/* roulang page: index */
:root{
  --bg:#070B14;
  --bg-soft:#0F1729;
  --bg-elev:#111C31;
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.085);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.18);
  --brand:#3B62F6;
  --brand-2:#5B84FF;
  --brand-soft:rgba(59,98,246,.12);
  --teal:#2ED3A6;
  --teal-soft:rgba(46,211,166,.14);
  --amber:#F5A524;
  --amber-soft:rgba(245,165,36,.14);
  --text:#C9D3E4;
  --text-strong:#F2F6FF;
  --muted:#8A98B3;
  --radius-lg:20px;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --shadow-brand:0 8px 28px -10px rgba(59,98,246,.75);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(900px 520px at 78% -6%,rgba(59,98,246,.18),transparent 62%),
    radial-gradient(760px 460px at 6% 12%,rgba(46,211,166,.08),transparent 60%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;color:var(--text-strong);font-weight:700;line-height:1.3;letter-spacing:.01em}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18}
h2{font-size:clamp(24px,2.6vw,34px)}
h3{font-size:clamp(18px,1.8vw,21px)}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:15px}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;border-radius:6px}
::selection{background:rgba(59,98,246,.4);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
@media (min-width:1440px){.container{max-width:1280px}}

/* ============ 布局网格 ============ */
.layout{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:20px}
.layout > *{grid-column:span 12;min-width:0}
@media (min-width:640px){
  .md-4{grid-column:span 4}
  .md-6{grid-column:span 6}
  .md-8{grid-column:span 8}
}
@media (min-width:1024px){
  .lg-3{grid-column:span 3}
  .lg-4{grid-column:span 4}
  .lg-5{grid-column:span 5}
  .lg-6{grid-column:span 6}
  .lg-7{grid-column:span 7}
  .lg-8{grid-column:span 8}
  .lg-12{grid-column:span 12}
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:background .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.site-header.is-scrolled{background:rgba(7,11,20,.92);border-bottom-color:var(--line);box-shadow:0 12px 30px -22px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;gap:18px;height:72px;transition:height .22s ease}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;
  box-shadow:0 8px 22px -10px rgba(59,98,246,.9),inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
}
.logo-mark::after{
  content:"";width:13px;height:15px;border:2px solid #fff;border-left:0;border-radius:0 6px 6px 0;opacity:.95;
  transform:translateX(-1px);
}
.logo-mark::before{
  content:"";position:absolute;left:9px;top:50%;width:8px;height:2px;background:#fff;transform:translateY(-50%);border-radius:2px;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{color:var(--text-strong);font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.logo-text em{font-style:normal;font-size:10.5px;color:var(--muted);letter-spacing:.14em;white-space:nowrap}
.nav-wrap{
  display:flex;align-items:center;gap:6px;
  overflow-x:auto;scrollbar-width:none;
  flex:1 1 auto;min-width:0;
  padding:2px 0;
  border-left:1px solid var(--line);
  padding-left:18px;
}
.nav-wrap::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;
  padding:7px 14px;border-radius:999px;
  font-size:13.5px;color:var(--muted);white-space:nowrap;
  border:1px solid transparent;
  transition:color .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.chip:hover{color:var(--text-strong);background:var(--glass)}
.chip:active{transform:translateY(1px)}
.chip.is-active{
  color:#A6BEFF;background:var(--brand-soft);
  border-color:rgba(59,98,246,.45);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.2);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding-left:14px;border-left:1px solid var(--line)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:11px;
  border:1px solid var(--line-strong);background:var(--glass);
  padding:0;place-items:center;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text-strong);border-radius:2px;position:relative;transition:.2s}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--text-strong);border-radius:2px;transition:.2s;
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .12s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:var(--shadow-brand);
}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 12px 34px -10px rgba(59,98,246,.85)}
.btn-ghost{
  color:var(--text-strong);background:transparent;border-color:var(--line-strong);
}
.btn-ghost:hover{border-color:var(--teal);box-shadow:0 0 0 2px var(--teal-soft);transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:#9DB6FF;font-weight:600;
  transition:color .18s ease,gap .18s ease;
}
.link-arrow::after{content:"→";transition:transform .18s ease}
.link-arrow:hover{color:#C6D6FF}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:72px 0 84px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.16;
  -webkit-mask-image:radial-gradient(120% 80% at 70% 20%,#000 0%,rgba(0,0,0,.35) 55%,transparent 85%);
  mask-image:radial-gradient(120% 80% at 70% 20%,#000 0%,rgba(0,0,0,.35) 55%,transparent 85%);
}
.hero-inner{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:32px;align-items:center;position:relative;z-index:1}
.hero-copy{grid-column:span 12}
.hero-visual{grid-column:span 12}
@media (min-width:1024px){
  .hero-copy{grid-column:span 7}
  .hero-visual{grid-column:span 5}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.02em;color:var(--teal);
  background:var(--teal-soft);border:1px solid rgba(46,211,166,.28);
  padding:5px 14px;border-radius:999px;margin-bottom:20px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(46,211,166,.16)}
.hero h1{margin-bottom:18px;overflow-wrap:break-word}
.hero h1 .hl{
  background:linear-gradient(120deg,var(--brand-2),#9FC0FF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;line-height:1.85;color:var(--text);max-width:580px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.badge-line{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;color:var(--muted);
  background:var(--glass);border:1px solid var(--line);
  padding:6px 13px;border-radius:999px;
}
.badge-line::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal);flex:0 0 auto}

/* Hero 玻璃卡 */
.glass-card{
  position:relative;overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.glass-card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.hero-card{position:relative}
.hero-card-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.11;
  -webkit-mask-image:radial-gradient(85% 75% at 60% 30%,#000,transparent 78%);
  mask-image:radial-gradient(85% 75% at 60% 30%,#000,transparent 78%);
}
.hero-card-body{position:relative;z-index:1;padding:26px}
.status-row{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  font-size:13px;color:var(--text-strong);
  padding-bottom:16px;margin-bottom:18px;
  border-bottom:1px solid var(--line);
}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(46,211,166,.16);flex:0 0 auto}
.status-time{margin-left:auto;color:var(--muted);font-size:12px}
.hero-card-body h2{font-size:19px;margin-bottom:16px}
.quick-list{display:flex;flex-direction:column;gap:0;margin-bottom:20px}
.quick-list li{
  display:flex;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:14px;
}
.quick-list li:last-child{border-bottom:0}
.quick-list .k{color:var(--muted);flex:0 0 auto}
.quick-list .v{color:var(--text-strong);text-align:right;font-weight:500}
.hero-card-diagram{
  border-radius:14px;overflow:hidden;border:1px solid var(--line);
  margin-bottom:18px;position:relative;
}
.hero-card-diagram img{width:100%;height:150px;object-fit:cover;opacity:.85}

/* ============ 通用板块 ============ */
.section{padding:96px 0;position:relative}
.section + .section{border-top:1px solid var(--line)}
.section-alt{background:var(--bg-soft)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:44px;flex-wrap:wrap;
}
.section-head .head-text{max-width:720px}
.section-head h2{margin-top:12px}
.section-head p{margin:14px 0 0;color:var(--muted);font-size:15.5px;max-width:640px}
.label-sm{
  display:inline-block;font-size:12.5px;letter-spacing:.1em;
  color:var(--brand-2);text-transform:uppercase;font-weight:600;
}

/* 价值主张 */
.value-card{
  position:relative;background:var(--bg-elev);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;height:100%;
  box-shadow:var(--shadow);
  transition:border-color .2s ease,transform .2s ease;
  overflow:hidden;
}
.value-card:hover{border-color:rgba(59,98,246,.35);transform:translateY(-3px)}
.value-card .num{
  display:block;font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--amber);margin-bottom:14px;
}
.value-card .rule{width:44px;height:2px;background:var(--amber);opacity:.6;margin-bottom:18px;border-radius:2px}
.value-card h3{margin-bottom:12px;font-size:21px}
.value-card p{color:var(--muted);font-size:15px;margin:0}
.value-card.is-major{
  background:linear-gradient(160deg,rgba(59,98,246,.14),rgba(15,23,41,.6) 58%),var(--bg-elev);
  padding:34px;
}
.value-card.is-major h3{font-size:26px}
.value-card.is-major p{font-size:15.5px;color:var(--text)}
.value-card .meta-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:var(--teal-soft);color:var(--teal);
  border:1px solid rgba(46,211,166,.26);
}
.tag.amber{background:var(--amber-soft);color:var(--amber);border-color:rgba(245,165,36,.28)}
.tag.blue{background:var(--brand-soft);color:#9DB6FF;border-color:rgba(59,98,246,.32)}

/* 标签页 */
.feature-tabs{margin-top:8px}
.feature-tabs .tabs{
  display:flex;flex-wrap:wrap;gap:10px;border:0;background:transparent;margin:0 0 30px;padding:0;
}
.feature-tabs .tabs::before,.feature-tabs .tabs::after{display:none}
.feature-tabs .tabs-title{float:none}
.feature-tabs .tabs-title > a{
  display:inline-flex;align-items:center;
  padding:10px 20px;border-radius:999px;font-size:14px;
  color:var(--muted);background:rgba(255,255,255,.04);
  border:1px solid var(--line);transition:all .18s ease;
}
.feature-tabs .tabs-title > a:hover{color:var(--text-strong);border-color:var(--line-strong);background:var(--glass)}
.feature-tabs .tabs-title > a[aria-selected="true"]{
  color:#A6BEFF;background:var(--brand-soft);
  border-color:rgba(59,98,246,.5);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.2);
}
.feature-tabs .tabs-panel{padding:0}
.panel-inner{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:28px;align-items:center;
  animation:fadeUp .26s ease both;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.panel-text{grid-column:span 12}
.panel-media{grid-column:span 12}
@media (min-width:900px){
  .panel-text{grid-column:span 6}
  .panel-media{grid-column:span 6}
}
.panel-text h3{margin-bottom:14px;font-size:24px}
.panel-text p{color:var(--muted);font-size:15.5px}
.point-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.point-list li{
  display:flex;gap:11px;align-items:flex-start;
  font-size:14.5px;color:var(--text);
}
.point-list li::before{
  content:"";flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
  background:var(--teal-soft);border:1px solid rgba(46,211,166,.35);
  background-image:linear-gradient(var(--teal),var(--teal));
  background-size:8px 2px;background-position:center;background-repeat:no-repeat;
}
.panel-media .shot{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:var(--bg-elev);
}
.panel-media .shot img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* 场景交替块 */
.scene-block{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:32px;align-items:center;
  padding:34px;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--bg-elev);box-shadow:var(--shadow);
}
.scene-block + .scene-block{margin-top:24px}
.scene-copy{grid-column:span 12}
.scene-media{grid-column:span 12}
@media (min-width:900px){
  .scene-copy{grid-column:span 7}
  .scene-media{grid-column:span 5}
  .scene-block.is-flip .scene-copy{order:2}
  .scene-block.is-flip .scene-media{order:1}
}
.scene-copy h3{font-size:22px;margin-bottom:12px}
.scene-copy > p{color:var(--muted);font-size:15.5px}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:14px;border:1px solid var(--line)}

/* 最新信息卡片 */
.post-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:20px}
.post-card{
  grid-column:span 12;
  background:var(--bg-elev);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
@media (min-width:640px){.post-card{grid-column:span 6}}
@media (min-width:1024px){.post-card{grid-column:span 4}}
.post-card:hover{border-color:rgba(59,98,246,.38);transform:translateY(-3px);box-shadow:0 24px 48px -28px rgba(0,0,0,.9)}
.post-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#0A1222}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease;opacity:.92}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-badge{
  position:absolute;left:12px;top:12px;
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:rgba(7,11,20,.78);color:var(--teal);
  border:1px solid rgba(46,211,166,.35);
  backdrop-filter:blur(6px);
}
.post-body{padding:22px;display:flex;flex-direction:column;flex:1}
.post-title{
  font-size:17px;line-height:1.5;color:var(--text-strong);font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:10px;transition:color .18s ease;
}
.post-card:hover .post-title{color:#9DB6FF}
.post-excerpt{
  font-size:14px;color:var(--muted);line-height:1.75;margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted);
}
.post-foot .read{color:#9DB6FF;font-weight:600}
.post-card:hover .post-foot .read{color:#C6D6FF}
.empty-state{
  grid-column:span 12;text-align:center;padding:60px 24px;
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  color:var(--muted);background:rgba(255,255,255,.02);
}
.empty-state .empty-icon{
  width:46px;height:46px;border-radius:14px;margin:0 auto 16px;
  background:var(--brand-soft);border:1px solid rgba(59,98,246,.32);
  display:grid;place-items:center;color:#9DB6FF;font-size:20px;
}
.empty-state p{margin:0 0 18px;font-size:15px}

/* 数据条 & 案例 */
.metric-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;margin-bottom:32px;
}
.metric{background:var(--bg-soft);padding:30px 24px;text-align:center}
.metric b{display:block;font-size:clamp(26px,3vw,36px);color:var(--text-strong);line-height:1.1;letter-spacing:-.02em}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted)}
.case-card{
  background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;display:flex;flex-direction:column;gap:14px;
  transition:border-color .2s ease,transform .2s ease;
}
.case-card:hover{border-color:rgba(46,211,166,.32);transform:translateY(-3px)}
.case-card h3{font-size:18px}
.case-card p{color:var(--muted);font-size:14.5px;margin:0}
.case-card .case-tags{display:flex;flex-wrap:wrap;gap:8px}

/* 价格 */
.price-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:22px;align-items:stretch}
.price-card{
  grid-column:span 12;
  background:var(--bg-elev);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:30px;
  display:flex;flex-direction:column;position:relative;
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease;
}
@media (min-width:768px){.price-card{grid-column:span 4}}
.price-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.price-card .plan{font-size:14px;color:var(--muted);letter-spacing:.04em}
.price-card .amount{margin:14px 0 6px;font-size:34px;font-weight:700;color:var(--text-strong);line-height:1.1;letter-spacing:-.02em}
.price-card .amount small{font-size:14px;font-weight:500;color:var(--muted);letter-spacing:0;margin-left:4px}
.price-card .desc{font-size:13.5px;color:var(--muted);margin-bottom:22px}
.price-card ul{display:flex;flex-direction:column;gap:11px;margin-bottom:26px;flex:1}
.price-card ul li{display:flex;gap:10px;font-size:14.5px;color:var(--text);align-items:flex-start}
.price-card ul li::before{
  content:"";flex:0 0 auto;width:16px;height:16px;margin-top:4px;border-radius:5px;
  background:var(--brand-soft);border:1px solid rgba(59,98,246,.35);
  background-image:linear-gradient(#9DB6FF,#9DB6FF);
  background-size:7px 2px;background-position:center;background-repeat:no-repeat;
}
.price-card.is-featured{
  background:linear-gradient(170deg,rgba(59,98,246,.16),rgba(12,20,36,.92) 62%),var(--bg-elev);
  border-color:rgba(59,98,246,.45);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
@media (min-width:768px){
  .price-card.is-featured{transform:translateY(-16px)}
  .price-card.is-featured:hover{transform:translateY(-20px)}
}
.price-flag{
  position:absolute;right:22px;top:-13px;
  font-size:12px;font-weight:700;letter-spacing:.05em;
  color:#1A1206;background:var(--amber);
  padding:5px 13px;border-radius:999px;
  box-shadow:0 8px 20px -10px rgba(245,165,36,.9);
}

/* FAQ */
.faq-wrap{max-width:880px;margin:0 auto}
.accordion{border:0;background:transparent}
.accordion-item{
  border:1px solid var(--line);border-radius:14px;
  background:rgba(255,255,255,.035);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.accordion-item.is-active{border-color:rgba(59,98,246,.4);background:rgba(59,98,246,.06)}
.accordion-title{
  display:block;position:relative;
  padding:18px 52px 18px 22px;
  font-size:17px;font-weight:600;color:var(--text-strong);
  background:transparent;border:0;border-radius:14px;line-height:1.5;
  transition:color .18s ease,background .18s ease;
}
.accordion-title:hover{color:#fff;background:rgba(255,255,255,.03)}
.accordion-title::before{
  content:"";position:absolute;right:24px;top:50%;
  width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .18s ease,border-color .18s ease;
}
.accordion-item.is-active .accordion-title::before{transform:translateY(-30%) rotate(-135deg);border-color:#9DB6FF}
.accordion-content{
  padding:0 22px 20px !important;border:0 !important;
  font-size:15px;line-height:1.85;color:var(--text);background:transparent !important;
}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:linear-gradient(120deg,rgba(59,98,246,.2),rgba(15,23,41,.9) 55%),var(--bg-elev);
  padding:52px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,98,246,.35),transparent 68%);
  pointer-events:none;
}
.cta-band h2{margin-bottom:12px;position:relative;z-index:1}
.cta-band p{color:var(--muted);margin:0;max-width:560px;font-size:15.5px;position:relative;z-index:1}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* 页脚 */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-soft);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:32px;padding-bottom:48px}
.footer-brand{grid-column:span 12}
@media (min-width:768px){
  .footer-brand{grid-column:span 4}
  .footer-col{grid-column:span 3}
  .footer-col-wide{grid-column:span 2}
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px}
.footer-col h4{
  font-size:13px;letter-spacing:.1em;color:var(--text-strong);
  margin-bottom:16px;font-weight:700;text-transform:uppercase;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{
  font-size:14px;color:var(--muted);
  display:inline-block;transition:color .16s ease,transform .16s ease;
}
.footer-col ul li a:hover{color:var(--teal);transform:translateX(2px)}
.footer-note{font-size:14px;color:var(--muted);line-height:1.9}
.footer-note strong{color:var(--text-strong);font-weight:600}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* 移动端导航 */
@media (max-width:1023px){
  .header-actions .btn{display:none}
  .nav-toggle{display:grid}
  .nav-wrap{
    position:fixed;left:0;right:0;top:72px;
    flex-direction:column;align-items:stretch;gap:6px;
    background:rgba(9,14,26,.98);
    border-left:0;border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:16px 20px 24px;
    max-height:calc(100vh - 72px);overflow-y:auto;
    display:none;
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    z-index:55;
  }
  .nav-wrap.is-open{display:flex}
  .site-header.is-scrolled .nav-wrap{top:60px}
  .chip{padding:11px 16px;font-size:15px;border-radius:12px;border-color:var(--line)}
}
@media (max-width:639px){
  .section{padding:56px 0}
  .hero{padding:48px 0 60px}
  .container{padding:0 18px}
  .scene-block{padding:24px}
  .cta-band{padding:34px 24px}
  .metric-bar{grid-template-columns:1fr;}
  .metric{border-bottom:1px solid var(--line)}
  .metric:last-child{border-bottom:0}
  .logo-text strong{font-size:14.5px}
  .logo-text em{font-size:9.5px;letter-spacing:.1em}
  .hero-actions .btn{flex:1 1 auto}
  .price-card{padding:24px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:420px){
  .header-inner{height:62px;gap:10px}
  .logo-mark{width:34px;height:34px;border-radius:10px}
  .nav-wrap{top:62px}
  .site-header.is-scrolled .nav-wrap{top:62px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root{
  --bg:#070B14;
  --bg-2:#0F1729;
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.085);
  --primary:#3B62F6;
  --primary-2:#5B84FF;
  --mint:#2ED3A6;
  --amber:#F5A524;
  --text:#C9D3E4;
  --heading:#F2F6FF;
  --muted:#8A98B3;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.18);
  --radius:18px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --glow:0 8px 28px -10px rgba(59,98,246,.75);
  --container:1200px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    radial-gradient(1000px 620px at 10% -10%, rgba(59,98,246,.16), transparent 62%),
    radial-gradient(820px 520px at 96% 2%, rgba(46,211,166,.075), transparent 60%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary-2);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--mint);}
p{margin:0 0 1em;}
h1,h2,h3,h4,h5{color:var(--heading);margin:0;font-weight:700;letter-spacing:-.005em;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary-2);outline-offset:2px;}
::selection{background:rgba(59,98,246,.4);color:#fff;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:72px;
  display:flex;
  align-items:center;
  background:linear-gradient(180deg,rgba(7,11,20,.94),rgba(7,11,20,.62));
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:height .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(7,11,20,.9);
  border-bottom-color:var(--line);
  box-shadow:0 14px 32px -24px #000;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:16px;
  height:100%;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.logo-mark{
  width:34px;height:34px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
  position:relative;
  flex:0 0 auto;
}
.logo-mark::before{
  content:"";
  position:absolute;
  inset:9px 10px;
  border:2px solid rgba(255,255,255,.94);
  border-right-color:transparent;
  border-radius:3px 7px 7px 3px;
  transform:skewX(-7deg);
}
.logo-mark::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  width:5px;height:5px;
  margin:-2.5px 0 0 -2.5px;
  border-radius:50%;
  background:#fff;
  opacity:.9;
}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text strong{color:var(--heading);font-size:15.5px;font-weight:700;}
.logo-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.08em;}

.nav-wrap{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-wrap::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  display:inline-block;
  padding:8px 14px;
  border-radius:999px;
  font-size:13.5px;
  line-height:1.4;
  color:var(--muted);
  border:1px solid transparent;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.chip:hover{color:var(--heading);background:rgba(255,255,255,.06);}
.chip.is-active{
  color:var(--primary-2);
  background:rgba(59,98,246,.12);
  border-color:rgba(59,98,246,.35);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.16);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding-left:16px;
  border-left:1px solid var(--line);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .16s ease-out,box-shadow .16s ease-out,background .16s ease-out,border-color .16s ease-out,color .16s ease-out,filter .16s ease-out;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;
  box-shadow:var(--glow);
}
.btn-primary:hover{
  filter:brightness(1.07);
  transform:translateY(-1px);
  box-shadow:0 12px 34px -10px rgba(59,98,246,.92);
  color:#fff;
}
.btn-primary:active{transform:translateY(0);filter:brightness(.98);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line-strong);
}
.btn-ghost:hover{
  color:var(--heading);
  border-color:var(--mint);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px;}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  padding:0;
  border-radius:11px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.05);
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.nav-toggle span{
  position:relative;
  display:block;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--heading);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--heading);
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}

/* ============ 页面主体 ============ */
.page-main{padding-top:72px;}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:26px 0 0;
  font-size:13px;
  color:var(--muted);
}
.breadcrumb a{color:var(--muted);text-decoration:none;}
.breadcrumb a:hover{color:var(--primary-2);}
.breadcrumb .sep{opacity:.45;}
.breadcrumb .cur{
  color:var(--text);
  max-width:min(58vw,560px);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* 文章头部 */
.article-hero{padding:22px 0 30px;border-bottom:1px solid var(--line);}
.cat-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.02em;
  color:var(--mint);
  background:rgba(46,211,166,.14);
  border:1px solid rgba(46,211,166,.26);
}
.cat-badge::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 10px var(--mint);
}
.article-hero h1{
  margin:16px 0 18px;
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.26;
  font-weight:700;
  color:var(--heading);
  word-break:break-word;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  font-size:13px;
  color:var(--muted);
}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-row .meta-item::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:rgba(255,255,255,.28);
}
.meta-row .meta-item:first-child::before{display:none;}
.font-tools{display:inline-flex;align-items:center;gap:6px;margin-left:auto;color:var(--muted);}
.font-btn{
  width:27px;height:27px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:8px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.05);
  color:var(--text);
  font-size:12px;
  line-height:1;
  cursor:pointer;
  transition:all .16s ease;
}
.font-btn:hover{border-color:var(--primary);color:var(--primary-2);}

/* 文章布局 */
.article-layout{margin:0;padding-top:40px;row-gap:32px;}
.article-layout > .cell{padding-left:0;padding-right:0;}
@media (min-width:1024px){
  .article-main{padding-right:44px !important;}
}

/* 正文排版 */
.article-body{
  font-size:17.5px;
  line-height:1.9;
  color:var(--text);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  margin:2em 0 .8em;
  padding-left:14px;
  border-left:3px solid var(--primary);
  font-size:26px;
  line-height:1.4;
  font-weight:700;
  scroll-margin-top:96px;
}
.article-body h3{
  margin:1.6em 0 .7em;
  font-size:20px;
  line-height:1.5;
  font-weight:700;
  scroll-margin-top:96px;
}
.article-body h4{margin:1.4em 0 .6em;font-size:17px;font-weight:700;}
.article-body a{color:var(--primary-2);border-bottom:1px solid rgba(91,132,255,.4);}
.article-body a:hover{color:var(--mint);border-bottom-color:var(--mint);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em;}
.article-body li{margin-bottom:.5em;}
.article-body ul li::marker{color:var(--mint);}
.article-body ol li::marker{color:var(--amber);font-weight:700;}
.article-body blockquote{
  margin:1.6em 0;
  padding:16px 20px;
  border-left:2px solid var(--mint);
  background:rgba(255,255,255,.06);
  border-radius:0 12px 12px 0;
  color:#DCE5F5;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  max-width:100%;
  height:auto;
  margin:1.5em auto;
  border-radius:14px;
  border:1px solid var(--line);
}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.88em;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(255,255,255,.08);
  color:#A9C4FF;
}
.article-body pre{
  margin:1.5em 0;
  padding:16px 18px;
  border-radius:14px;
  border:1px solid var(--line);
  background:#0B1220;
  overflow-x:auto;
}
.article-body pre code{background:none;padding:0;color:#C9D3E4;}
.article-body table{
  width:100%;
  margin:1.5em 0;
  border-collapse:collapse;
  font-size:15px;
  display:block;
  overflow-x:auto;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:rgba(255,255,255,.05);color:var(--heading);font-weight:600;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0;}
.article-body iframe{max-width:100%;border-radius:14px;}

/* 空状态 */
.empty-state{
  text-align:center;
  padding:64px 28px;
  border-radius:var(--radius-lg);
  border:1px dashed var(--line-strong);
  background:var(--glass);
}
.empty-state .empty-icon{
  width:56px;height:56px;
  margin:0 auto 20px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(59,98,246,.14);
  border:1px solid rgba(59,98,246,.32);
  color:var(--primary-2);
  font-size:22px;
  font-weight:700;
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:24px;}

/* 标签 */
.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:38px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13px;color:var(--muted);margin-right:2px;}
.tag{
  display:inline-block;
  padding:7px 15px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--muted);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  text-decoration:none;
  transition:all .16s ease;
}
.tag:hover{color:var(--primary-2);border-color:rgba(59,98,246,.45);background:rgba(59,98,246,.1);}

/* 侧栏 */
.side-card{
  padding:22px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  margin-bottom:20px;
}
.side-card h3{
  font-size:15px;
  margin:0 0 14px;
  color:var(--heading);
  letter-spacing:.02em;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:3px;height:14px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--primary-2),var(--mint));
}
.toc-list{
  list-style:none;
  margin:0;
  padding:0;
  max-height:320px;
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:2px;
  scrollbar-width:thin;
}
.toc-list a{
  display:block;
  padding:8px 10px;
  border-radius:8px;
  border-left:2px solid transparent;
  font-size:13.5px;
  line-height:1.6;
  color:var(--muted);
  text-decoration:none;
  transition:all .16s ease;
}
.toc-list a:hover{color:var(--primary-2);background:rgba(59,98,246,.1);border-left-color:var(--primary);}
.toc-list a.is-sub{padding-left:24px;font-size:13px;}
.toc-empty{font-size:13px;color:var(--muted);margin:0;}
.side-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:10px 13px;
  border-radius:10px;
  font-size:14px;
  color:var(--text);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  text-decoration:none;
  transition:all .16s ease;
}
.side-links a:hover{
  color:var(--heading);
  border-color:rgba(59,98,246,.5);
  transform:translateX(2px);
}
.side-links a span{color:var(--muted);font-size:12px;}
.side-card .btn{width:100%;}
.side-sticky{position:static;}
@media (min-width:1024px){
  .side-sticky{position:sticky;top:92px;}
}

/* 相关推荐 */
.rel-section{padding:64px 0 0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px;
  margin-bottom:26px;
}
.section-head h2{font-size:26px;line-height:1.3;}
.section-head p{margin:6px 0 0;font-size:14px;color:var(--muted);}
.rel-grid{margin-top:4px;}
.rel-card{
  display:flex;
  flex-direction:column;
  height:100%;
  margin-bottom:20px;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.rel-card:hover{
  transform:translateY(-3px);
  border-color:rgba(59,98,246,.45);
}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-body .rel-badge{
  align-self:flex-start;
  font-size:11.5px;
  padding:4px 11px;
  border-radius:999px;
  color:var(--amber);
  background:rgba(245,165,36,.14);
  border:1px solid rgba(245,165,36,.26);
}
.rel-body h3{font-size:16px;line-height:1.5;margin:0;font-weight:600;}
.rel-body h3 a{color:var(--heading);text-decoration:none;}
.rel-card:hover .rel-body h3 a{color:var(--primary-2);}
.rel-body p{
  margin:0;
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

/* CTA */
.cta-band{
  margin-top:64px;
  padding:44px 40px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(59,98,246,.3);
  background:linear-gradient(120deg,rgba(59,98,246,.2),rgba(46,211,166,.08));
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;top:-80px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(59,98,246,.34),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:26px;line-height:1.35;margin-bottom:8px;}
.cta-band p{margin:0;font-size:14.5px;color:var(--text);max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:80px;
  padding-top:56px;
  border-top:1px solid var(--line);
  background:#05080F;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;}
}
.footer-brand p{
  margin:16px 0 0;
  font-size:13.5px;
  line-height:1.9;
  color:var(--muted);
  max-width:36ch;
}
.footer-col h4{
  font-size:14px;
  margin:0 0 14px;
  color:var(--heading);
  font-weight:600;
  letter-spacing:.02em;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.footer-col a{
  display:inline-block;
  font-size:13.5px;
  color:var(--muted);
  text-decoration:none;
  transition:color .16s ease,transform .16s ease;
}
.footer-col a:hover{color:var(--mint);transform:translateX(2px);}
.footer-note{font-size:13.5px;line-height:1.9;color:var(--muted);margin:0;}
.footer-note strong{color:var(--text);font-weight:600;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  margin-top:44px;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--muted);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}
  .nav-wrap{
    position:fixed;
    top:72px;left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:14px 20px 22px;
    background:#0A1120;
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px -26px #000;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    z-index:79;
  }
  .nav-wrap.is-open{display:flex;}
  .chip{padding:12px 14px;border-radius:12px;font-size:15px;}
  .header-actions{padding-left:12px;}
  .font-tools{margin-left:0;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-main{padding-top:72px;}
  .article-hero h1{font-size:clamp(24px,6.4vw,30px);}
  .article-body{font-size:16.5px;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:18px;}
  .cta-band{padding:32px 22px;}
  .cta-band h2{font-size:22px;}
  .section-head h2{font-size:22px;}
  .logo-text em{display:none;}
  .header-actions .btn-sm{padding:8px 14px;font-size:13px;}
  .rel-section{padding-top:48px;}
  .site-footer{margin-top:56px;}
}
@media (max-width:519px){
  .header-actions .btn-sm{display:none;}
  .breadcrumb{font-size:12px;}
  .meta-row{font-size:12.5px;gap:6px 14px;}
  .empty-state{padding:44px 18px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category1 */
:root{
  --bg:#070B14;
  --bg-panel:#0F1729;
  --bg-soft:#0B1220;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.085);
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --primary:#3B62F6;
  --primary-2:#5B84FF;
  --teal:#2ED3A6;
  --gold:#F5A524;
  --text:#C9D3E4;
  --text-strong:#EAF0FB;
  --muted:#8A98B3;
  --radius:18px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --shadow-soft:0 10px 30px -18px rgba(0,0,0,.65);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Manrope","Inter",system-ui,-apple-system,sans-serif;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 520px at 78% -8%,rgba(59,98,246,.18),transparent 62%),
    radial-gradient(700px 420px at 8% 4%,rgba(46,211,166,.08),transparent 60%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary-2);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:#9DB7FF;}
h1,h2,h3,h4,p,ul,ol{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;border:0;background:none;cursor:pointer;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:8px;}

/* ============ 容器与通用 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
.section{
  padding:88px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
  position:relative;
}
.section:last-of-type{border-bottom:0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:36px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.3;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:-.01em;
  margin-bottom:10px;
}
.section-head p{
  color:var(--muted);
  font-size:15px;
  max-width:640px;
  line-height:1.8;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.02em;
  color:#A7B9EA;
  background:rgba(59,98,246,.12);
  border:1px solid rgba(59,98,246,.32);
  padding:5px 13px;
  border-radius:999px;
  line-height:1.6;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(46,211,166,.16);
  flex:0 0 auto;
}
.link-more{
  font-size:14px;
  color:var(--teal);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:transform .18s ease,color .18s ease;
}
.link-more::after{content:"→";font-size:14px;transition:transform .18s ease;}
.link-more:hover{color:#68E9C6;}
.link-more:hover::after{transform:translateX(3px);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  white-space:nowrap;
  border:1px solid transparent;
  transition:transform .15s ease-out,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;
  box-shadow:0 8px 28px -10px rgba(59,98,246,.75);
}
.btn-primary:hover{
  color:#fff;
  filter:brightness(1.06);
  transform:translateY(-1px);
  box-shadow:0 16px 36px -10px rgba(59,98,246,.85);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.97);}
.btn-ghost{
  background:rgba(255,255,255,.03);
  border-color:rgba(255,255,255,.18);
  color:#DDE6F7;
}
.btn-ghost:hover{
  color:#fff;
  border-color:rgba(46,211,166,.65);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px;}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:72px;
  display:flex;
  align-items:center;
  background:rgba(7,11,20,.66);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:height .22s ease,background .22s ease,border-color .22s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(7,11,20,.92);
  border-bottom-color:var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  color:var(--text-strong);
}
.logo:hover{color:var(--text-strong);}
.logo-mark{
  width:34px;height:34px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-2));
  position:relative;
  box-shadow:0 8px 22px -10px rgba(59,98,246,.95);
  flex:0 0 auto;
}
.logo-mark::before{
  content:"";
  position:absolute;
  inset:9px 12px 9px 11px;
  border:2px solid rgba(255,255,255,.94);
  border-right-color:transparent;
  border-radius:4px;
}
.logo-mark::after{
  content:"";
  position:absolute;
  right:8px;top:50%;
  width:8px;height:2px;
  background:#fff;
  border-radius:2px;
  transform:translateY(-50%);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;}
.logo-text em{font-size:11px;font-style:normal;color:var(--muted);letter-spacing:.06em;margin-top:3px;}

.nav-wrap{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  margin-left:10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-wrap::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  padding:7px 14px;
  border-radius:999px;
  font-size:13.5px;
  color:var(--muted);
  border:1px solid transparent;
  white-space:nowrap;
  transition:color .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.chip:hover{color:var(--text-strong);background:rgba(255,255,255,.06);}
.chip.is-active{
  color:#BBCBFF;
  background:rgba(59,98,246,.12);
  border-color:rgba(59,98,246,.36);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.12);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
  padding-left:14px;
  border-left:1px solid rgba(255,255,255,.1);
}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.05);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:50%;
  width:16px;height:2px;
  background:#DDE6F7;
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  padding:132px 0 64px;
  border-bottom:1px solid var(--border);
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.22;
  -webkit-mask-image:radial-gradient(120% 92% at 76% 6%,#000 0%,transparent 74%);
  mask-image:radial-gradient(120% 92% at 76% 6%,#000 0%,transparent 74%);
  z-index:0;
}
.cat-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--teal);}
.breadcrumb span.sep{color:rgba(255,255,255,.22);}
.cat-hero h1{
  font-size:clamp(30px,4vw,48px);
  line-height:1.2;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:-.015em;
  margin:16px 0 18px;
  max-width:16em;
}
.cat-hero h1 .accent{
  background:linear-gradient(120deg,#8FA9FF,#2ED3A6);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cat-hero .lead{
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  max-width:38em;
}
.hero-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:28px;
}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:26px;
  font-size:13.5px;
  color:var(--muted);
}
.hero-facts li{
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.hero-facts li::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:var(--teal);
  flex:0 0 auto;
}

/* Hero 视觉卡 */
.hero-visual{
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:18px;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.hero-visual::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.24),transparent);
}
.hero-shot{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--border);
  aspect-ratio:16/10;
  background:var(--bg-soft);
}
.hero-shot img{
  width:100%;height:100%;
  object-fit:cover;
  opacity:.92;
}
.hero-shot::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.05) 0%,rgba(7,11,20,.72) 100%);
}
.hero-shot-tag{
  position:absolute;
  left:12px;bottom:12px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:#DCE6FA;
  background:rgba(7,11,20,.68);
  border:1px solid rgba(255,255,255,.16);
  padding:5px 11px;
  border-radius:999px;
  backdrop-filter:blur(6px);
}
.hero-shot-tag i{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(46,211,166,.18);
  display:inline-block;
}
.hero-bullets{margin-top:16px;display:grid;gap:10px;}
.hero-bullets li{
  display:flex;
  gap:10px;
  font-size:13.5px;
  line-height:1.7;
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.06);
}
.hero-bullets li b{
  color:#A9BDF3;
  font-weight:600;
  flex:0 0 auto;
}

/* ============ 筛选 chip 行 ============ */
.filter-bar{
  padding:22px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(15,23,41,.5);
}
.filter-chips{
  display:flex;
  gap:8px;
  overflow-x:auto;
  scrollbar-width:none;
  padding-bottom:2px;
}
.filter-chips::-webkit-scrollbar{display:none;}
.filter-chip{
  flex:0 0 auto;
  font-size:13.5px;
  color:var(--muted);
  padding:8px 16px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.03);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.filter-chip:hover{color:var(--text-strong);border-color:rgba(59,98,246,.45);background:rgba(59,98,246,.1);}
.filter-chip.is-on{
  color:#BBF3E2;
  border-color:rgba(46,211,166,.42);
  background:rgba(46,211,166,.1);
}

/* ============ 卡片通用 ============ */
.card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  overflow:hidden;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
  z-index:2;
}
.card:hover{
  border-color:rgba(59,98,246,.32);
  transform:translateY(-2px);
  box-shadow:0 22px 46px -24px rgba(0,0,0,.8);
}
.thumb{
  overflow:hidden;
  background:var(--bg-soft);
  display:block;
}
.thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .28s ease;
}
.card:hover .thumb img,
.mini-row:hover .thumb img,
.scene-media:hover img{transform:scale(1.03);}
.badge{
  display:inline-block;
  font-size:12px;
  letter-spacing:.02em;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(46,211,166,.14);
  color:#84EBD0;
  border:1px solid rgba(46,211,166,.24);
  line-height:1.6;
}
.badge-gold{
  background:rgba(245,165,36,.14);
  color:#F8C874;
  border-color:rgba(245,165,36,.26);
}
.badge-blue{
  background:rgba(59,98,246,.14);
  color:#A6BEFF;
  border-color:rgba(59,98,246,.3);
}
.meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:var(--muted);
  margin-top:16px;
}
.meta .dot{
  width:3px;height:3px;
  border-radius:50%;
  background:rgba(255,255,255,.24);
}

/* ============ 编辑推荐 ============ */
.rec-main{display:flex;flex-direction:column;height:100%;}
.rec-main .thumb{aspect-ratio:16/8;}
.rec-body{padding:26px 28px 28px;}
.rec-body h2{
  font-size:22px;
  line-height:1.45;
  font-weight:700;
  color:var(--text-strong);
  margin:14px 0 12px;
}
.rec-body h2 a{color:var(--text-strong);}
.rec-body h2 a:hover{color:var(--primary-2);text-decoration:underline;text-underline-offset:4px;}
.rec-body p{font-size:15px;color:var(--text);line-height:1.85;}

.mini-row{
  display:flex;
  align-items:stretch;
  gap:0;
  margin-top:20px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.mini-row:hover{
  border-color:rgba(59,98,246,.3);
  background:rgba(255,255,255,.06);
  transform:translateY(-2px);
}
.mini-row .thumb{
  flex:0 0 132px;
  width:132px;
  height:auto;
  min-height:98px;
}
.mini-row .mini-body{
  padding:16px 18px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:8px;
  min-width:0;
}
.mini-row h3{
  font-size:15.5px;
  font-weight:600;
  line-height:1.55;
  color:var(--text-strong);
}
.mini-row h3 a{color:var(--text-strong);}
.mini-row h3 a:hover{color:var(--primary-2);text-decoration:underline;text-underline-offset:3px;}
.mini-row .meta{margin-top:2px;}

.side-card{
  background:rgba(15,23,41,.72);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:8px 22px 10px;
  height:100%;
}
.side-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:16px 0 14px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.side-head h3{
  font-size:15px;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:.01em;
}
.side-head span{font-size:12px;color:var(--muted);}
.side-item{
  display:flex;
  gap:14px;
  padding:18px 0;
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:transform .18s ease;
}
.side-item:last-child{border-bottom:0;}
.side-item:hover{transform:translateX(2px);}
.side-num{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  color:var(--gold);
  line-height:1.5;
  padding-top:2px;
  flex:0 0 auto;
  letter-spacing:.02em;
}
.side-item h4{
  font-size:15px;
  font-weight:600;
  line-height:1.6;
  color:var(--text-strong);
  margin-bottom:6px;
}
.side-item h4 a{color:var(--text-strong);}
.side-item h4 a:hover{color:var(--primary-2);text-decoration:underline;text-underline-offset:3px;}
.side-item p{
  font-size:13px;
  color:var(--muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.side-item .meta{margin-top:8px;font-size:12px;}

/* ============ 步骤板块 ============ */
.steps{
  background:linear-gradient(180deg,rgba(15,23,41,.62),rgba(7,11,20,0));
}
.step-card{
  position:relative;
  padding:28px 24px 26px;
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  height:100%;
  transition:border-color .2s ease,transform .2s ease;
}
.step-card:hover{border-color:rgba(59,98,246,.32);transform:translateY(-2px);}
.step-card .step-idx{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  color:var(--gold);
  letter-spacing:.08em;
  display:block;
  margin-bottom:14px;
}
.step-card .step-idx::after{
  content:"";
  display:block;
  width:38px;height:1px;
  margin-top:12px;
  background:linear-gradient(90deg,rgba(245,165,36,.8),rgba(245,165,36,0));
}
.step-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:10px;
}
.step-card p{font-size:14.5px;color:var(--text);line-height:1.85;}

/* ============ 场景板块 ============ */
.scene-row{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:40px;
  align-items:center;
  padding:34px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.scene-row:last-child{border-bottom:0;padding-bottom:0;}
.scene-row.reverse .scene-media{order:2;}
.scene-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
  background:var(--bg-soft);
}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.scene-body h3{
  font-size:22px;
  font-weight:700;
  color:var(--text-strong);
  margin:12px 0 12px;
  line-height:1.4;
}
.scene-body > p{font-size:15px;color:var(--text);line-height:1.85;}
.check-list{margin:18px 0 20px;display:grid;gap:11px;}
.check-list li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--text);
}
.check-list li::before{
  content:"";
  flex:0 0 auto;
  width:16px;height:16px;
  margin-top:5px;
  border-radius:5px;
  background:rgba(46,211,166,.14);
  border:1px solid rgba(46,211,166,.36);
  position:relative;
}
.check-list li::after{
  content:"";
  position:absolute;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;}
.faq-list{margin:0;border:0;background:transparent;}
.faq-list .accordion-item{
  background:rgba(255,255,255,.045);
  border:1px solid var(--border) !important;
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-list .accordion-item:hover{border-color:rgba(255,255,255,.18) !important;}
.faq-list .accordion-item.is-active{
  border-color:rgba(59,98,246,.38) !important;
  background:rgba(59,98,246,.08);
}
.faq-list .accordion-title{
  position:relative;
  display:block;
  padding:19px 56px 19px 22px;
  font-size:17px;
  font-weight:700;
  line-height:1.55;
  color:var(--text-strong);
  border:0;
  background:transparent;
  transition:color .2s ease;
}
.faq-list .accordion-title:hover,
.faq-list .accordion-title:focus{color:#B9CBFF;}
.faq-list .accordion-title::before{
  content:"";
  position:absolute;
  right:24px;
  top:50%;
  width:9px;height:9px;
  margin:0;
  border-right:2px solid var(--teal);
  border-bottom:2px solid var(--teal);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .2s ease;
  background:none;
  inset-inline-start:auto;
}
.faq-list .accordion-item.is-active .accordion-title::before{
  transform:translateY(-30%) rotate(-135deg);
}
.faq-list .accordion-content{
  padding:0 22px 20px !important;
  border:0 !important;
  background:transparent !important;
  color:var(--text);
  font-size:15px;
  line-height:1.9;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  background:rgba(255,255,255,.055);
  border:1px solid var(--border);
  border-radius:24px;
  padding:44px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(600px 240px at 12% 0%,rgba(59,98,246,.24),transparent 70%);
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  color:var(--text-strong);
  line-height:1.35;
  margin-bottom:10px;
}
.cta-band p{font-size:15px;color:var(--muted);max-width:44em;line-height:1.8;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid rgba(255,255,255,.08);
  background:rgba(9,14,26,.85);
  padding:64px 0 28px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{
  font-size:13.5px;
  line-height:1.85;
  color:var(--muted);
  max-width:34em;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul li a{
  font-size:13.5px;
  color:var(--muted);
  display:inline-block;
  transition:color .18s ease,transform .18s ease;
}
.footer-col ul li a:hover{color:var(--teal);transform:translateX(2px);}
.footer-note{
  font-size:13px;
  line-height:1.9;
  color:var(--muted);
}
.footer-note strong{color:#A9B6CE;font-weight:600;}
.footer-bottom{
  margin-top:46px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.07);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:rgba(160,175,200,.72);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-col-wide{grid-column:1 / -1;}
}
@media (max-width:1023px){
  .nav-wrap{
    position:fixed;
    top:60px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin-left:0;
    padding:14px 20px 22px;
    background:rgba(9,14,26,.98);
    border-bottom:1px solid var(--border);
    box-shadow:0 26px 48px -24px rgba(0,0,0,.9);
    transform:translateY(-10px);
    opacity:0;
    pointer-events:none;
    max-height:calc(100vh - 60px);
    overflow-y:auto;
    transition:transform .22s ease,opacity .22s ease;
    z-index:95;
  }
  .nav-wrap.is-open{transform:none;opacity:1;pointer-events:auto;}
  .nav-wrap .chip{padding:11px 15px;border-radius:12px;font-size:14.5px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .header-actions{padding-left:12px;gap:10px;}
  .cat-hero{padding:112px 0 52px;}
  .hero-visual{margin-top:32px;}
  .section{padding:64px 0;}
  .scene-row{grid-template-columns:1fr;gap:24px;padding:26px 0;}
  .scene-row.reverse .scene-media{order:0;}
  .cta-band{padding:32px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .header-inner{padding:0 18px;gap:12px;}
  .logo-text em{display:none;}
  .logo-text strong{font-size:15px;}
  .cat-hero{padding:104px 0 44px;}
  .cat-hero h1{font-size:clamp(26px,7vw,34px);}
  .cat-hero .lead{font-size:15.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .rec-body{padding:20px 20px 22px;}
  .rec-body h2{font-size:19px;}
  .mini-row .thumb{flex:0 0 104px;width:104px;min-height:88px;}
  .mini-row .mini-body{padding:14px 14px;}
  .mini-row h3{font-size:14.5px;}
  .side-card{padding:6px 18px 8px;}
  .section-head{margin-bottom:26px;}
  .faq-list .accordion-title{font-size:15.5px;padding:16px 48px 16px 18px;}
  .faq-list .accordion-content{padding:0 18px 18px !important;font-size:14.5px;}
  .cta-band{padding:26px 20px;border-radius:18px;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:519px){
  .logo-mark{width:30px;height:30px;border-radius:9px;}
  .logo-mark::before{inset:8px 10px 8px 9px;}
  .logo-text strong{font-size:14px;letter-spacing:0;}
  .header-actions .btn-sm{padding:8px 12px;font-size:12.5px;}
  .hero-facts{gap:8px 16px;font-size:12.5px;}
  .step-card{padding:22px 18px;}
  .scene-body h3{font-size:19px;}
  .filter-bar{padding:16px 0;}
}
@media (min-width:1440px){
  .container,.header-inner{max-width:1280px;}
}

/* roulang page: category3 */
:root{
  --bg:#070B14;
  --bg-soft:#0F1729;
  --bg-elev:#121C33;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.085);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.18);
  --brand:#3B62F6;
  --brand-2:#5B84FF;
  --mint:#2ED3A6;
  --gold:#F5A524;
  --text:#EAF0FB;
  --body:#C9D3E4;
  --muted:#8A98B3;
  --radius:18px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --ease:120ms ease-out;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 480px at 82% -8%,rgba(59,98,246,.20),transparent 62%),
    radial-gradient(700px 420px at 4% 8%,rgba(46,211,166,.10),transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand-2);text-decoration:none;transition:color var(--ease);}
a:hover{color:#8FA9FF;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;}
p{margin:0 0 16px;}
ul,ol{margin:0 0 16px;padding-left:20px;}
li{margin-bottom:8px;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){.container{max-width:1280px;}}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:background 200ms ease,border-color 200ms ease,box-shadow 200ms ease;
}
.site-header.is-scrolled{
  background:rgba(9,14,26,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -22px rgba(0,0,0,.9);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
  transition:height 200ms ease;
}
.site-header.is-scrolled .header-inner{height:60px;}
.logo{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text);
  text-decoration:none;
}
.logo:hover{color:var(--text);}
.logo-mark{
  width:36px;height:36px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  box-shadow:0 10px 24px -12px rgba(59,98,246,.9),inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
  flex:0 0 auto;
}
.logo-mark::before{
  content:"";
  position:absolute;
  left:9px;top:9px;bottom:9px;width:11px;
  border:2px solid #fff;
  border-right:none;
  border-radius:3px 0 0 3px;
  opacity:.95;
}
.logo-mark::after{
  content:"";
  position:absolute;
  right:9px;top:50%;
  width:11px;height:2px;
  background:#fff;
  transform:translateY(-50%);
  border-radius:2px;
  box-shadow:0 0 0 1px rgba(255,255,255,0);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:16px;letter-spacing:.01em;color:var(--text);white-space:nowrap;}
.logo-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.08em;}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:8px;
  flex:1 1 auto;
  overflow-x:auto;
  scrollbar-width:none;
  padding:4px 2px;
}
.nav-wrap::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  padding:7px 14px;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.02em;
  color:var(--muted);
  border:1px solid transparent;
  white-space:nowrap;
  transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease);
}
.chip:hover{color:var(--text);background:rgba(255,255,255,.06);}
.chip.is-active{
  color:#C3D2FF;
  background:rgba(59,98,246,.16);
  border-color:rgba(59,98,246,.42);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.chip:active{transform:translateY(1px);}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
  padding-left:16px;
  border-left:1px solid var(--line);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  text-align:center;
  line-height:1.2;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;
  box-shadow:0 8px 28px -10px rgba(59,98,246,.75),inset 0 1px 0 rgba(255,255,255,.22);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 14px 36px -12px rgba(59,98,246,.95),inset 0 1px 0 rgba(255,255,255,.3);
  filter:brightness(1.06);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line-strong);
}
.btn-ghost:hover{
  color:var(--text);
  border-color:var(--mint);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
  transform:translateY(-1px);
}
.btn-sm{padding:9px 18px;font-size:13px;border-radius:10px;}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:11px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.05);
  position:relative;
  padding:0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:50%;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--text);
  transform:translateX(-50%);
  transition:transform 200ms ease,opacity 200ms ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;left:0;transform:none;}
.nav-toggle span::after{top:6px;left:0;transform:none;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:rotate(45deg) translateY(6px);}
.nav-toggle.is-open span::after{transform:rotate(-45deg) translateY(-6px);}

/* ============ hero ============ */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center right;
  opacity:.10;
  -webkit-mask-image:radial-gradient(120% 90% at 78% 20%,#000 0%,transparent 72%);
  mask-image:radial-gradient(120% 90% at 78% 20%,#000 0%,transparent 72%);
  z-index:0;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.55fr .95fr;
  gap:44px;
  align-items:center;
  position:relative;
  z-index:1;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.02em;
  color:#BFD0FF;
  background:rgba(59,98,246,.14);
  border:1px solid rgba(59,98,246,.34);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:20px;
}
.eyebrow .dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(46,211,166,.18);
}
.page-hero h1{
  font-size:clamp(30px,4.1vw,50px);
  line-height:1.18;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.page-hero h1 .hl{
  background:linear-gradient(120deg,var(--brand-2),#9FB8FF 65%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  max-width:620px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  letter-spacing:.02em;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--muted);
}
.tag-mint{color:#8FF0D6;background:rgba(46,211,166,.12);border-color:rgba(46,211,166,.3);}
.tag-gold{color:#FFD79A;background:rgba(245,165,36,.13);border-color:rgba(245,165,36,.3);}
.tag-brand{color:#C3D2FF;background:rgba(59,98,246,.14);border-color:rgba(59,98,246,.34);}
.hero-card{
  background:linear-gradient(160deg,rgba(255,255,255,.085),rgba(255,255,255,.035));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:22px;
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.hero-figure{
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  margin-bottom:18px;
  position:relative;
  background:var(--bg-soft);
}
.hero-figure img{width:100%;height:168px;object-fit:cover;opacity:.92;}
.hero-figure .figure-badge{
  position:absolute;
  left:12px;bottom:12px;
  font-size:12px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(7,11,20,.78);
  border:1px solid var(--line-strong);
  color:var(--text);
  backdrop-filter:blur(6px);
}
.status-row{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:14px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.status-light{
  width:8px;height:8px;border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(46,211,166,.15);
  flex:0 0 auto;
}
.hero-list{list-style:none;margin:0;padding:0;}
.hero-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--body);
  margin-bottom:12px;
  line-height:1.7;
}
.hero-list li:last-child{margin-bottom:0;}
.hero-list .num{
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:3px;
  border-radius:6px;
  background:rgba(59,98,246,.16);
  color:#BFD0FF;
  font-size:11px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;
}

/* ============ section base ============ */
.section{padding:72px 0;}
.section + .section{border-top:1px solid var(--line);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:34px;
  flex-wrap:wrap;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.3;
}
.section-head .sub{
  font-size:14px;
  color:var(--muted);
  max-width:560px;
  margin-top:8px;
}
.section-link{
  font-size:14px;
  color:#BFD0FF;
  white-space:nowrap;
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),color var(--ease);
}
.section-link:hover{color:#fff;border-bottom-color:var(--brand-2);}

/* ============ filter chips ============ */
.filter-bar{
  display:flex;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:2px 0 4px;
  margin-bottom:28px;
  border-bottom:1px solid var(--line);
  padding-bottom:18px;
}
.filter-bar::-webkit-scrollbar{display:none;}
.filter-chip{
  flex:0 0 auto;
  font-size:13px;
  letter-spacing:.02em;
  padding:8px 16px;
  border-radius:999px;
  color:var(--muted);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:all var(--ease);
}
.filter-chip:hover{color:var(--text);border-color:var(--line-strong);background:rgba(255,255,255,.07);}
.filter-chip.is-active{
  color:#D4E0FF;
  background:rgba(59,98,246,.18);
  border-color:rgba(59,98,246,.5);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
}
.filter-chip:active{transform:translateY(1px);}

/* ============ wide row cards ============ */
.row-list{display:flex;flex-direction:column;gap:20px;}
.row-card{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:22px;
  padding:20px;
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05);
  transition:border-color 200ms ease,transform 200ms ease,box-shadow 200ms ease,background 200ms ease;
}
.row-card:hover{
  border-color:rgba(59,98,246,.4);
  background:var(--bg-elev);
  transform:translateY(-2px);
  box-shadow:0 22px 46px -26px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.08);
}
.row-thumb{
  width:160px;height:110px;
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-elev);
  position:relative;
}
.row-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 200ms ease;}
.row-card:hover .row-thumb img{transform:scale(1.06);}
.row-body{min-width:0;}
.row-top{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:8px;
}
.row-body h3{
  font-size:20px;
  line-height:1.4;
  margin-bottom:8px;
}
.row-body h3 a{color:var(--text);}
.row-body h3 a:hover{
  color:var(--brand-2);
  text-decoration:underline;
  text-underline-offset:3px;
}
.row-body p{
  font-size:15px;
  line-height:1.75;
  color:var(--body);
  margin-bottom:12px;
}
.row-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted);
  padding-top:12px;
  border-top:1px dashed rgba(255,255,255,.08);
}
.row-foot .meta{display:flex;gap:14px;flex-wrap:wrap;}
.row-link{
  font-size:13px;
  color:#BFD0FF;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color var(--ease),gap var(--ease);
}
.row-link::after{content:"→";font-size:13px;}
.row-link:hover{color:#fff;gap:10px;}
.empty-note{
  display:none;
  text-align:center;
  padding:48px 20px;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius);
  color:var(--muted);
  font-size:14px;
}

/* ============ flow ============ */
.flow-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  align-items:start;
}
.flow-steps{display:flex;flex-direction:column;gap:16px;position:relative;}
.flow-step{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:16px;
  padding:20px 22px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.flow-num{
  width:44px;height:44px;
  border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;
  font-size:15px;
  color:var(--gold);
  background:rgba(245,165,36,.12);
  border:1px solid rgba(245,165,36,.28);
}
.flow-step h3{font-size:17px;margin-bottom:6px;}
.flow-step p{font-size:14px;line-height:1.7;color:var(--body);margin:0;}
.check-card{
  background:linear-gradient(165deg,rgba(46,211,166,.09),rgba(255,255,255,.03));
  border:1px solid rgba(46,211,166,.26);
  border-radius:var(--radius-lg);
  padding:26px;
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.1);
}
.check-card h3{font-size:19px;margin-bottom:6px;}
.check-card .check-sub{font-size:13px;color:var(--muted);margin-bottom:18px;}
.check-list{list-style:none;margin:0;padding:0;}
.check-list li{
  position:relative;
  padding-left:26px;
  font-size:14.5px;
  line-height:1.75;
  margin-bottom:13px;
  color:var(--body);
}
.check-list li:last-child{margin-bottom:0;}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:8px;
  width:14px;height:14px;
  border-radius:4px;
  border:1px solid rgba(46,211,166,.55);
  background:rgba(46,211,166,.14);
}
.check-list li::after{
  content:"";
  position:absolute;
  left:4px;top:11px;
  width:5px;height:8px;
  border:2px solid var(--mint);
  border-top:none;
  border-left:none;
  transform:rotate(40deg);
}

/* ============ stat strip ============ */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-top:28px;
}
.stat-item{
  padding:20px;
  border-radius:var(--radius);
  background:var(--bg-soft);
  border:1px solid var(--line);
  text-align:left;
}
.stat-item strong{
  display:block;
  font-size:26px;
  color:var(--text);
  letter-spacing:-.01em;
  line-height:1.2;
  margin-bottom:4px;
}
.stat-item span{font-size:13px;color:var(--muted);}

/* ============ faq ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--bg-soft);
  overflow:hidden;
  transition:border-color 200ms ease,background 200ms ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item[open]{
  border-color:rgba(59,98,246,.42);
  background:var(--bg-elev);
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:18px 52px 18px 20px;
  font-size:17px;
  font-weight:700;
  color:var(--text);
  position:relative;
  line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  position:absolute;
  right:20px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform 180ms ease,border-color 180ms ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand-2);}
.faq-answer{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--body);
  border-top:1px solid rgba(255,255,255,.06);
  padding-top:16px;
  margin-top:0;
}
.faq-answer p:last-child{margin-bottom:0;}

/* ============ cta ============ */
.cta-band{
  position:relative;
  border-radius:var(--radius-lg);
  border:1px solid rgba(59,98,246,.34);
  background:
    radial-gradient(600px 240px at 88% 0%,rgba(59,98,246,.28),transparent 70%),
    linear-gradient(150deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  padding:44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.14);
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;bottom:-80px;
  width:280px;height:280px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(46,211,166,.22),transparent 68%);
  pointer-events:none;
}
.cta-band h2{
  font-size:clamp(22px,2.4vw,30px);
  margin-bottom:10px;
  position:relative;
  z-index:1;
}
.cta-band p{
  margin:0;
  font-size:15px;
  color:var(--body);
  max-width:620px;
  position:relative;
  z-index:1;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1;}

/* ============ footer ============ */
.site-footer{
  margin-top:72px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(15,23,41,.7),rgba(7,11,20,.95));
  padding:56px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr 1.1fr;
  gap:36px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  margin-top:16px;
  max-width:340px;
}
.footer-col h4{
  font-size:14px;
  letter-spacing:.04em;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  font-size:14px;
  color:var(--muted);
  display:inline-block;
  transition:color var(--ease),transform var(--ease);
}
.footer-col a:hover{color:var(--mint);transform:translateX(2px);}
.footer-note{font-size:13.5px;line-height:1.85;color:var(--muted);margin:0;}
.footer-note strong{color:var(--body);font-weight:600;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:13px;
  color:var(--muted);
}

/* ============ responsive ============ */
@media (max-width:1023px){
  .header-inner{height:64px;gap:14px;}
  .nav-toggle{display:inline-block;}
  .header-actions .btn-primary{display:none;}
  .nav-wrap{
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    background:rgba(9,14,26,.97);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    padding:16px 24px 22px;
    max-height:0;
    overflow:hidden;
    opacity:0;
    pointer-events:none;
    transition:max-height 260ms ease,opacity 200ms ease,padding 200ms ease;
    box-shadow:0 24px 40px -28px rgba(0,0,0,.95);
  }
  .nav-wrap.is-open{max-height:480px;opacity:1;pointer-events:auto;}
  .chip{width:100%;justify-content:flex-start;padding:11px 16px;font-size:14px;border-radius:12px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-card{max-width:560px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .flow-wrap{grid-template-columns:1fr;}
  .section{padding:56px 0;}
}
@media (max-width:767px){
  .page-hero{padding:44px 0 40px;}
  .hero-lead{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .row-card{grid-template-columns:120px 1fr;gap:16px;padding:16px;}
  .row-thumb{width:120px;height:96px;}
  .row-body h3{font-size:17px;}
  .stat-strip{grid-template-columns:1fr;}
  .cta-band{padding:30px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (max-width:519px){
  .container{padding:0 18px;}
  .row-card{grid-template-columns:1fr;}
  .row-thumb{width:100%;height:150px;}
  .hero-figure img{height:150px;}
  .faq-item summary{font-size:16px;padding:16px 46px 16px 16px;}
  .logo-text em{display:none;}
  .logo-text strong{font-size:15px;}
}

/* roulang page: category2 */
:root{
  --bg:#070B14;
  --bg-panel:#0F1729;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.18);
  --brand:#3B62F6;
  --brand-2:#5B84FF;
  --teal:#2ED3A6;
  --gold:#F5A524;
  --text:#EAF0FA;
  --body:#C9D3E4;
  --muted:#8A98B3;
  --radius:18px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --container:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;
  background:var(--bg);
  background-image:
    radial-gradient(90% 60% at 85% -10%,rgba(59,98,246,.20),transparent 60%),
    radial-gradient(70% 50% at 0% 0%,rgba(46,211,166,.10),transparent 55%);
  background-repeat:no-repeat;
  color:var(--body);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-2);text-decoration:none;transition:color .16s ease}
a:hover{color:#8FAEFF}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;border-radius:8px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  height:72px;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:height .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(9,14,26,.88);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -24px rgba(0,0,0,.9);
}
.header-inner{display:flex;align-items:center;gap:18px;height:100%}

.logo{display:flex;align-items:center;gap:11px;flex:0 0 auto;text-decoration:none}
.logo-mark{
  position:relative;width:30px;height:30px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 6px 18px -8px rgba(59,98,246,.9);
}
.logo-mark::before{
  content:"";position:absolute;inset:8px 8px 8px 9px;
  border-left:2px solid #fff;border-top:2px solid #fff;border-radius:3px 0 0 0;opacity:.95;
}
.logo-mark::after{
  content:"";position:absolute;right:8px;bottom:8px;width:8px;height:8px;
  border-right:2px solid #fff;border-bottom:2px solid #fff;border-radius:0 0 3px 0;opacity:.95;
}
.logo-text strong{display:block;font-size:16px;line-height:1.2;color:#fff;letter-spacing:.02em;font-weight:700}
.logo-text em{display:block;font-style:normal;font-size:11px;line-height:1.4;color:var(--muted);letter-spacing:.08em}

.nav-wrap{display:flex;align-items:center;gap:6px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none;padding:4px 2px}
.nav-wrap::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;white-space:nowrap;
  padding:8px 14px;border-radius:999px;
  font-size:13.5px;color:var(--muted);text-decoration:none;
  border:1px solid transparent;background:transparent;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.chip:hover{color:#fff;background:rgba(255,255,255,.055)}
.chip.is-active{
  color:#A6BCFF;
  background:rgba(59,98,246,.13);
  border-color:rgba(59,98,246,.45);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.14);
}

.header-actions{display:flex;align-items:center;gap:14px;padding-left:16px;border-left:1px solid var(--line);flex:0 0 auto}
.nav-toggle{
  display:none;width:38px;height:34px;border-radius:10px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  cursor:pointer;position:relative;padding:0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:16px;height:1.6px;border-radius:2px;background:#D7E1F2;transform:translateX(-50%);transition:.18s ease;
}
.nav-toggle span{top:50%;margin-top:-.8px}
.nav-toggle span::before{top:-5.5px}
.nav-toggle span::after{top:5.5px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:translateX(-50%) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:translateX(-50%) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;line-height:1.2;
  padding:12px 22px;border:1px solid transparent;cursor:pointer;
  text-decoration:none;white-space:nowrap;
  transition:transform .12s ease-out,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#3B62F6,#5B84FF);
  color:#fff;
  box-shadow:0 8px 28px -10px rgba(59,98,246,.75);
}
.btn-primary:hover{
  color:#fff;transform:translateY(-1px);
  background:linear-gradient(135deg,#4A70FF,#7095FF);
  box-shadow:0 14px 34px -12px rgba(59,98,246,.95);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(59,98,246,.9)}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:#DCE5F5;
}
.btn-ghost:hover{
  color:#fff;border-color:rgba(46,211,166,.65);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:64px 0 68px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(180deg,rgba(7,11,20,.86),rgba(7,11,20,.97)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(59,98,246,.6),transparent);
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--teal)}
.crumb .sep{color:rgba(255,255,255,.25)}
.crumb .now{color:#C9D3E4}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:12.5px;letter-spacing:.04em;
  color:#9CD8C6;background:rgba(46,211,166,.10);
  border:1px solid rgba(46,211,166,.30);
  margin-bottom:20px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 3px rgba(46,211,166,.18)}

h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.18;font-weight:700;color:#fff;letter-spacing:-.01em;
  margin-bottom:18px;
}
h1 .hl{color:#9BB4FF}
.lede{font-size:16.5px;line-height:1.9;color:var(--body);max-width:46em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.meta-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  font-size:13px;color:#B9C6DD;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
}
.meta-pill i{width:6px;height:6px;border-radius:50%;background:var(--brand-2);display:inline-block}

.hero-visual{position:relative}
.visual-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  padding:14px;
  overflow:hidden;
}
.visual-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 80% at 80% 0%,rgba(59,98,246,.18),transparent 62%);
}
.visual-media{border-radius:14px;overflow:hidden;border:1px solid var(--line);position:relative}
.visual-media img{width:100%;height:210px;object-fit:cover;opacity:.94}
.visual-body{position:relative;padding:16px 8px 6px}
.status-line{display:flex;align-items:center;gap:8px;font-size:13px;color:#8FE3CB;margin-bottom:14px}
.status-line .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(46,211,166,.15)}
.visual-list{display:flex;flex-direction:column;gap:10px}
.visual-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--muted);
  padding:10px 12px;border-radius:12px;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.06);
}
.visual-list strong{color:#DCE6F6;font-weight:600}

/* ---------- jump bar ---------- */
.jump-bar{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:18px 20px;border-radius:16px;
  background:rgba(15,23,41,.85);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.jump-label{font-size:12.5px;color:var(--muted);letter-spacing:.08em;padding-right:12px;border-right:1px solid var(--line);margin-right:4px}
.jump-bar .chip{border-color:rgba(255,255,255,.10);background:rgba(255,255,255,.03)}
.jump-bar .chip:hover{border-color:rgba(59,98,246,.45);color:#fff}

/* ---------- sections ---------- */
.section{padding:92px 0}
.section--tight{padding:36px 0 0}
.section--alt{background:linear-gradient(180deg,rgba(15,23,41,.65),rgba(7,11,20,0))}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:28px;
  flex-wrap:wrap;margin-bottom:38px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);line-height:1.32;color:#fff;font-weight:700;letter-spacing:-.01em;
}
.section-head .kicker{
  display:block;font-size:12.5px;letter-spacing:.14em;color:var(--teal);
  text-transform:uppercase;margin-bottom:10px;font-weight:600;
}
.section-head p{color:var(--muted);font-size:14.5px;margin-top:12px;max-width:52em}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:#9BB4FF;white-space:nowrap;
}
.text-link::after{content:"→";transition:transform .18s ease}
.text-link:hover{color:#fff}
.text-link:hover::after{transform:translateX(3px)}

/* ---------- foundation overrides ---------- */
.grid-x.grid-margin-x{margin-left:-10px;margin-right:-10px}
.grid-x.grid-margin-x>.cell{margin-left:0;margin-right:0;padding-left:10px;padding-right:10px;margin-bottom:20px}

/* ---------- check cards ---------- */
.check-card{
  height:100%;display:flex;flex-direction:column;
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.check-card:hover{
  transform:translateY(-3px);
  border-color:rgba(59,98,246,.42);
  box-shadow:0 24px 48px -26px rgba(0,0,0,.85),0 0 0 1px rgba(59,98,246,.14);
}
.check-media{position:relative;display:block;overflow:hidden;background:#0A1120}
.check-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .22s ease;opacity:.92}
.check-card:hover .check-media img{transform:scale(1.03)}
.check-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0) 40%,rgba(7,11,20,.72));
  pointer-events:none;
}
.num-badge{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:3px 11px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--gold);background:rgba(245,165,36,.15);
  border:1px solid rgba(245,165,36,.42);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.check-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.check-tags{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 11px;border-radius:999px;
  font-size:12px;letter-spacing:.02em;
  color:#A9B7CE;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.09);
}
.badge-teal{color:#8FE3CB;background:rgba(46,211,166,.13);border-color:rgba(46,211,166,.32)}
.badge-blue{color:#A6BCFF;background:rgba(59,98,246,.14);border-color:rgba(59,98,246,.34)}
.check-body h3{font-size:19px;line-height:1.45;color:#fff;font-weight:700}
.check-body h3 a{color:#fff}
.check-body h3 a:hover{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px}
.check-body p{font-size:14.5px;line-height:1.85;color:var(--muted)}
.check-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:12.5px;color:#7C8AA5;
}

/* ---------- flow ---------- */
.flow-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start}
.flow-intro h2{font-size:clamp(24px,2.6vw,32px);line-height:1.34;color:#fff;margin-bottom:16px;font-weight:700}
.flow-intro p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:22px}
.flow-note{
  padding:16px 18px;border-radius:14px;
  background:rgba(46,211,166,.06);
  border:1px solid rgba(46,211,166,.24);
  font-size:13.5px;color:#A9D9CB;line-height:1.8;
}
.steps{display:flex;flex-direction:column;gap:14px}
.step{
  display:grid;grid-template-columns:48px 1fr;gap:16px;
  padding:20px 22px;border-radius:16px;
  background:var(--bg-panel);
  border:1px solid var(--line);
  transition:border-color .2s ease,transform .2s ease;
}
.step:hover{border-color:rgba(59,98,246,.4);transform:translateX(3px)}
.step-num{
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#BFCEFF;
  background:rgba(59,98,246,.14);border:1px solid rgba(59,98,246,.34);
}
.step h3{font-size:17px;color:#fff;margin-bottom:6px;font-weight:700}
.step p{font-size:14.5px;line-height:1.82;color:var(--muted)}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);position:relative}
.split-media img{width:100%;height:340px;object-fit:cover;opacity:.92}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(100% 80% at 20% 100%,rgba(59,98,246,.24),transparent 62%);
}
.split-body h2{font-size:clamp(23px,2.4vw,30px);line-height:1.34;color:#fff;margin-bottom:14px;font-weight:700}
.split-body>p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:22px}
.check-list{display:flex;flex-direction:column;gap:14px}
.check-list li{
  display:grid;grid-template-columns:24px 1fr;gap:12px;
  font-size:14.8px;color:#C4D0E2;line-height:1.8;
}
.check-list li .mk{
  width:20px;height:20px;margin-top:5px;border-radius:50%;
  border:1px solid rgba(46,211,166,.5);
  background:rgba(46,211,166,.14);
  position:relative;
}
.check-list li .mk::after{
  content:"";position:absolute;left:6px;top:4px;width:6px;height:9px;
  border-right:1.8px solid var(--teal);border-bottom:1.8px solid var(--teal);
  transform:rotate(40deg);
}
.check-list li strong{color:#fff;font-weight:600}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  border:1px solid var(--line);border-radius:16px;
  background:rgba(255,255,255,.032);
  overflow:hidden;transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.16)}
.faq-item.is-open{border-color:rgba(59,98,246,.42);background:rgba(59,98,246,.055)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;background:none;border:0;cursor:pointer;text-align:left;
  color:#EAF0FA;font-size:16.5px;font-weight:700;line-height:1.6;
}
.faq-q .ico{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-2);font-size:12px;
  transition:transform .18s ease,border-color .18s ease,color .18s ease;
}
.faq-item.is-open .faq-q .ico{transform:rotate(180deg);border-color:rgba(59,98,246,.6);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 22px 20px;font-size:14.8px;line-height:1.9;color:var(--muted)}

/* ---------- cta ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:42px 44px;border-radius:24px;
  background:linear-gradient(135deg,rgba(59,98,246,.20),rgba(46,211,166,.10));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);color:#fff;line-height:1.34;margin-bottom:8px;font-weight:700}
.cta-band p{color:#B7C5DB;font-size:14.5px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:#060A11;
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.5fr;gap:36px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--muted)}
.footer-col h4{font-size:14px;color:#EAF0FA;font-weight:700;margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{display:inline-block;font-size:14px;color:var(--muted);transition:color .15s ease,transform .15s ease}
.footer-col a:hover{color:var(--teal);transform:translateX(2px)}
.footer-note{font-size:14px;line-height:1.9;color:var(--muted)}
.footer-note strong{color:#C4D0E2;font-weight:600}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  margin-top:42px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.06);
  font-size:13px;color:#6F7C95;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-wrap{
    position:fixed;left:0;right:0;top:64px;
    flex-direction:column;align-items:stretch;
    gap:8px;padding:18px 22px 26px;
    background:rgba(9,14,26,.98);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -28px rgba(0,0,0,.95);
    max-height:calc(100vh - 64px);overflow-y:auto;
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
    z-index:65;
  }
  .nav-wrap.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav-wrap .chip{padding:12px 16px;font-size:15px;border-radius:12px;border-color:rgba(255,255,255,.08);background:rgba(255,255,255,.03)}
  .header-actions{padding-left:0;border-left:0}
  .flow-grid,.split{grid-template-columns:1fr;gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .split-media img{height:280px}
  .page-hero{padding:48px 0 54px}
  .section{padding:64px 0}
  .section--tight{padding:26px 0 0}
}
@media (max-width:767px){
  .header-inner{gap:12px}
  .logo-text em{display:none}
  .btn-sm{padding:8px 14px;font-size:13px}
  .cta-band{padding:30px 24px;border-radius:20px}
  .section-head{align-items:flex-start}
  .jump-bar{padding:14px}
  .jump-label{width:100%;border-right:0;padding-right:0;margin-right:0;padding-bottom:4px}
  .step{grid-template-columns:40px 1fr;padding:18px}
  .step-num{width:40px;height:40px;border-radius:12px;font-size:14px}
  .split-media img{height:220px}
  .site-footer{margin-top:64px;padding:48px 0 24px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .check-body{padding:18px 18px 20px}
  .faq-q{font-size:15.5px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category4 */
:root{
  --bg:#070B14;
  --panel:#0F1729;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.18);
  --text:#E8EEF9;
  --body:#C9D3E4;
  --muted:#8A98B3;
  --primary:#3B62F6;
  --primary-2:#5B84FF;
  --teal:#2ED3A6;
  --amber:#F5A524;
  --radius:18px;
  --radius-lg:20px;
  --radius-btn:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --section-gap:96px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding-top:72px;
  background:var(--bg);
  color:var(--body);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 78% -8%, rgba(59,98,246,.20), transparent 62%),
    radial-gradient(700px 420px at 6% 18%, rgba(46,211,166,.10), transparent 66%);
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary-2);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--teal);}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--primary-2);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:.01em;}
h1{font-size:clamp(32px,4.2vw,52px);line-height:1.18;}
h2{font-size:clamp(26px,2.6vw,34px);line-height:1.3;}
h3{font-size:20px;line-height:1.45;}
p{margin:0 0 1em;color:var(--body);}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:72px;
  background:rgba(7,11,20,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:height .2s ease,background .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(7,11,20,.93);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:22px;
  height:100%;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text);
}
.logo:hover{color:var(--text);}
.logo-mark{
  width:36px;height:36px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--primary) 0%,#5B84FF 55%,#2ED3A6 140%);
  box-shadow:0 10px 26px -12px rgba(59,98,246,.85),inset 0 1px 0 rgba(255,255,255,.32);
  position:relative;
  flex:0 0 auto;
}
.logo-mark::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:13px;height:13px;
  border-right:2.4px solid rgba(7,11,20,.88);
  border-bottom:2.4px solid rgba(7,11,20,.88);
  transform:translate(-62%,-50%) rotate(-45deg);
  border-radius:2px;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:16px;letter-spacing:.02em;color:var(--text);white-space:nowrap;}
.logo-text em{
  font-style:normal;
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  margin-top:3px;
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-wrap::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;
  align-items:center;
  flex:0 0 auto;
  padding:8px 14px;
  border-radius:999px;
  font-size:13.5px;
  letter-spacing:.02em;
  color:var(--muted);
  background:transparent;
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.chip:hover{
  color:var(--text);
  background:rgba(255,255,255,.055);
  border-color:rgba(255,255,255,.08);
}
.chip.is-active{
  color:#C3D2FF;
  background:rgba(59,98,246,.14);
  border-color:rgba(59,98,246,.42);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.16);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding-left:20px;
  border-left:1px solid var(--line);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease,color .16s ease;
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-2) 100%);
  box-shadow:0 8px 28px -10px rgba(59,98,246,.75);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 14px 34px -10px rgba(59,98,246,.95);
  filter:brightness(1.06);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  color:var(--text);
  background:transparent;
  border-color:var(--line-strong);
}
.btn-ghost:hover{
  color:var(--teal);
  border-color:rgba(46,211,166,.7);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
  transform:translateY(-1px);
}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:11px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.04);
  position:relative;
  cursor:pointer;
  padding:0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:50%;
  width:16px;height:2px;
  background:var(--text);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--section-gap) 0;}
.section-tight{padding:56px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
  flex-wrap:wrap;
}
.section-head h2{margin-bottom:8px;}
.section-head p{margin:0;color:var(--muted);font-size:15px;max-width:640px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--teal);
  text-transform:uppercase;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:linear-gradient(90deg,var(--teal),transparent);
}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  padding:72px 0 64px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:-10% -6% auto -6%;
  height:120%;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.10;
  mask-image:radial-gradient(60% 70% at 62% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(60% 70% at 62% 30%,#000 0%,transparent 78%);
  z-index:0;
}
.cat-hero .container{position:relative;z-index:1;}
.cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
}
.cat-hero h1{margin-bottom:20px;}
.cat-hero h1 .accent{
  background:linear-gradient(120deg,var(--primary-2),var(--teal));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cat-hero .lead{
  font-size:17px;
  line-height:1.9;
  color:var(--body);
  max-width:600px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-facts div{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);}
.dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 4px rgba(46,211,166,.14);
  flex:0 0 auto;
}
.hero-figure{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:var(--glass);
}
.hero-figure img{
  width:100%;
  height:300px;
  object-fit:cover;
  opacity:.92;
  transition:transform .4s ease;
}
.hero-figure:hover img{transform:scale(1.03);}
.hero-figure figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:18px 20px;
  font-size:13.5px;
  color:var(--body);
  background:linear-gradient(to top,rgba(7,11,20,.94),rgba(7,11,20,.05));
  border-top:1px solid rgba(255,255,255,.07);
}

/* ---------- 筛选 chip ---------- */
.filter-row{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:18px 0 4px;
  scrollbar-width:none;
  border-top:1px solid var(--line);
  margin-top:40px;
}
.filter-row::-webkit-scrollbar{display:none;}
.filter-row .chip{
  background:rgba(255,255,255,.04);
  border-color:rgba(255,255,255,.09);
  color:var(--muted);
  font-size:13px;
  padding:7px 14px;
}
.filter-row .chip.is-on{
  color:#C3D2FF;
  background:rgba(59,98,246,.16);
  border-color:rgba(59,98,246,.48);
}

/* ---------- 标签云 ---------- */
.tag-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  padding:26px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  font-size:13.5px;
  letter-spacing:.02em;
  color:var(--body);
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.10);
  transition:color .18s ease,border-color .18s ease,background .18s ease,transform .18s ease;
}
.tag::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:var(--primary-2);
  opacity:.85;
}
.tag:hover{
  color:var(--teal);
  border-color:rgba(46,211,166,.55);
  background:rgba(46,211,166,.08);
  transform:translateY(-1px);
}
.tag .count{
  font-size:12px;
  color:var(--muted);
  padding-left:6px;
  border-left:1px solid rgba(255,255,255,.12);
}

/* ---------- 三列等高卡 ---------- */
.perm-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  align-items:stretch;
}
.perm-card{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:26px;
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.perm-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
  opacity:.6;
}
.perm-card:hover{
  transform:translateY(-3px);
  border-color:rgba(59,98,246,.42);
  box-shadow:0 24px 48px -26px rgba(0,0,0,.85);
}
.perm-card .num{
  font-family:Manrope,Inter,system-ui,sans-serif;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--amber);
  margin-bottom:14px;
}
.perm-card h3{font-size:19px;margin-bottom:10px;}
.perm-card p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
  margin-bottom:18px;
  flex:1 1 auto;
}
.perm-card .card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13.5px;
}
.perm-card .card-foot a{display:inline-flex;align-items:center;gap:6px;}
.badge{
  display:inline-flex;
  align-items:center;
  padding:3px 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.02em;
  color:var(--teal);
  background:rgba(46,211,166,.14);
  border:1px solid rgba(46,211,166,.24);
}
.badge-amber{
  color:var(--amber);
  background:rgba(245,165,36,.13);
  border-color:rgba(245,165,36,.26);
}
.badge-blue{
  color:#AFC3FF;
  background:rgba(59,98,246,.14);
  border-color:rgba(59,98,246,.28);
}

/* ---------- 流程步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.step{
  padding:24px 22px;
  border-radius:var(--radius);
  background:rgba(15,23,41,.72);
  border:1px solid var(--line);
  position:relative;
  transition:border-color .2s ease,background .2s ease;
}
.step:hover{
  border-color:rgba(46,211,166,.38);
  background:rgba(15,23,41,.95);
}
.step .step-no{
  font-family:Manrope,Inter,system-ui,sans-serif;
  font-size:26px;
  font-weight:700;
  color:rgba(255,255,255,.16);
  line-height:1;
  margin-bottom:14px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.8;color:var(--muted);margin:0;}

/* ---------- 对照条 ---------- */
.compare{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:20px;
}
.compare-card{
  padding:28px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
}
.compare-card.hl{
  background:linear-gradient(160deg,rgba(59,98,246,.16),rgba(46,211,166,.06));
  border-color:rgba(59,98,246,.34);
}
.compare-card h3{margin-bottom:16px;font-size:19px;}
.tick-list li{
  display:flex;
  gap:12px;
  padding:10px 0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--body);
  border-bottom:1px dashed rgba(255,255,255,.07);
}
.tick-list li:last-child{border-bottom:0;}
.tick-list li::before{
  content:"";
  flex:0 0 auto;
  width:16px;height:16px;
  margin-top:6px;
  border-radius:50%;
  background:rgba(46,211,166,.16);
  border:1px solid rgba(46,211,166,.5);
  position:relative;
}
.tick-list li::after{
  content:"";
  position:absolute;
}

/* ---------- FAQ ---------- */
.faq{
  display:grid;
  gap:12px;
  max-width:920px;
}
.faq details{
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  transition:border-color .2s ease,background .2s ease;
  overflow:hidden;
}
.faq details[open]{
  border-color:rgba(59,98,246,.42);
  background:rgba(59,98,246,.07);
}
.faq summary{
  list-style:none;
  cursor:pointer;
  padding:18px 22px;
  font-size:17px;
  font-weight:700;
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"";
  width:10px;height:10px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  flex:0 0 auto;
  transition:transform .18s ease,border-color .18s ease;
}
.faq details[open] summary::after{
  transform:rotate(-135deg);
  border-color:var(--teal);
}
.faq .answer{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--body);
  border-top:1px solid rgba(255,255,255,.06);
  padding-top:16px;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:24px;
  padding:48px;
  background:linear-gradient(120deg,rgba(59,98,246,.20),rgba(46,211,166,.08) 70%,rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;top:-90px;
  width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(59,98,246,.35),transparent 66%);
  pointer-events:none;
}
.cta-band h2{margin-bottom:10px;}
.cta-band p{margin:0;color:rgba(233,240,252,.82);font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--section-gap);
  border-top:1px solid var(--line);
  background:rgba(9,14,26,.82);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  line-height:1.9;
  color:var(--muted);
}
.footer-col h4{
  font-size:15px;
  margin-bottom:16px;
  color:var(--text);
  letter-spacing:.04em;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{
  font-size:14px;
  color:var(--muted);
  display:inline-block;
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:var(--teal);transform:translateX(2px);}
.footer-note{
  font-size:13.5px;
  line-height:1.9;
  color:var(--muted);
  margin:0;
}
.footer-note strong{color:var(--body);font-weight:600;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .perm-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:1023px){
  :root{--section-gap:72px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-wrap{
    position:fixed;
    top:72px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:16px 18px 22px;
    background:rgba(9,14,26,.985);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -24px rgba(0,0,0,.9);
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    display:none;
    z-index:79;
  }
  .nav-wrap.is-open{display:flex;}
  .nav-wrap .chip{
    width:100%;
    justify-content:flex-start;
    padding:12px 16px;
    font-size:14.5px;
    border-radius:12px;
  }
  .header-actions{border-left:0;padding-left:0;}
  .cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .hero-figure img{height:250px;}
  .perm-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .compare{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:767px){
  :root{--section-gap:56px;}
  body{font-size:15.5px;}
  .container{padding:0 18px;}
  .cat-hero{padding:48px 0 40px;}
  .hero-figure img{height:200px;}
  .cta-band{padding:30px 22px;}
  .perm-grid{grid-template-columns:minmax(0,1fr);}
  .steps{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .section-head{margin-bottom:26px;}
}
@media (max-width:519px){
  .logo-text em{display:none;}
  .hero-actions .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .tag{padding:8px 13px;font-size:13px;}
}

/* roulang page: category5 */
:root{
  --bg:#070B14;
  --bg-soft:#0F1729;
  --bg-deep:#0A1120;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.085);
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --primary:#3B62F6;
  --primary-2:#5B84FF;
  --primary-soft:rgba(59,98,246,.14);
  --mint:#2ED3A6;
  --amber:#F5A524;
  --text:#C9D3E4;
  --text-strong:#F2F6FF;
  --muted:#8A98B3;
  --radius-sm:12px;
  --radius:18px;
  --radius-lg:20px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.7);
  --shadow-glow:0 8px 28px -10px rgba(59,98,246,.75);
  --ease:120ms ease-out;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(59,98,246,.18),transparent 62%),
    radial-gradient(760px 460px at 96% 4%,rgba(46,211,166,.10),transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary-2);text-decoration:none;transition:color var(--ease);}
a:hover{color:#8FA9FF;}
h1,h2,h3,h4{color:var(--text-strong);margin:0;font-weight:700;line-height:1.3;letter-spacing:.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary-2);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media screen and (min-width:1440px){
  .container{max-width:1280px;}
}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  height:72px;
  display:flex;
  align-items:center;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:height .22s ease,background .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(9,14,26,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 32px -24px rgba(0,0,0,.9);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:22px;
  width:100%;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex-shrink:0;
  color:var(--text-strong);
}
.logo-mark{
  width:34px;height:34px;
  border-radius:11px;
  background:linear-gradient(145deg,var(--primary),#7B5BFF 62%,#2ED3A6);
  position:relative;
  box-shadow:0 8px 22px -10px rgba(59,98,246,.9),inset 0 1px 0 rgba(255,255,255,.35);
  flex-shrink:0;
}
.logo-mark::before{
  content:"";
  position:absolute;
  inset:9px 8px 9px 12px;
  border:2px solid rgba(255,255,255,.92);
  border-left:0;
  border-radius:0 6px 6px 0;
}
.logo-mark::after{
  content:"";
  position:absolute;
  left:9px;top:50%;
  width:9px;height:2px;
  background:rgba(255,255,255,.92);
  transform:translateY(-50%);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-text strong{font-size:16px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.logo-text em{
  font-style:normal;
  font-size:11px;
  color:var(--muted);
  letter-spacing:.06em;
  white-space:nowrap;
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding:4px 2px;
}
.nav-wrap::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;
  align-items:center;
  padding:7px 14px;
  border-radius:999px;
  font-size:13.5px;
  color:var(--muted);
  white-space:nowrap;
  border:1px solid transparent;
  transition:color var(--ease),background var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.chip:hover{
  color:var(--text-strong);
  background:rgba(255,255,255,.06);
}
.chip.is-active{
  color:#BCCBFF;
  background:var(--primary-soft);
  box-shadow:inset 0 0 0 1px rgba(59,98,246,.45);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  padding-left:18px;
  border-left:1px solid var(--line-soft);
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:40px;height:38px;
  border-radius:10px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  position:relative;
  cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:16px;height:2px;
  border-radius:2px;
  background:#D9E2F5;
  transform:translate(-50%,-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translate(-50%,-50%) rotate(45deg);top:50%;}
.nav-toggle[aria-expanded="true"] span::after{transform:translate(-50%,-50%) rotate(-45deg);top:50%;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  text-align:center;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 14px 34px -12px rgba(59,98,246,.9);
  filter:brightness(1.06);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  color:var(--text-strong);
  background:transparent;
  border-color:rgba(255,255,255,.18);
}
.btn-ghost:hover{
  color:var(--text-strong);
  border-color:var(--mint);
  box-shadow:0 0 0 2px rgba(46,211,166,.18);
}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:10px;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--primary-2);
}
.text-link::after{content:"→";transition:transform var(--ease);}
.text-link:hover::after{transform:translateX(3px);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  padding:132px 0 56px;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.20;
  filter:saturate(.9);
  -webkit-mask-image:radial-gradient(120% 90% at 28% 18%,#000 8%,rgba(0,0,0,.35) 52%,transparent 86%);
  mask-image:radial-gradient(120% 90% at 28% 18%,#000 8%,rgba(0,0,0,.35) 52%,transparent 86%);
  z-index:0;
}
.cat-hero .container{position:relative;z-index:1;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:20px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--mint);}
.crumb span.sep{color:rgba(255,255,255,.22);}
.crumb span.now{color:var(--text);}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:40px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(46,211,166,.10);
  border:1px solid rgba(46,211,166,.28);
  font-size:12.5px;
  letter-spacing:.06em;
  color:#8EF0D6;
  margin-bottom:20px;
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(46,211,166,.16);
}
.cat-hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.18;
  margin-bottom:18px;
}
.cat-hero h1 .accent{
  background:linear-gradient(120deg,#8FA9FF,#F2F6FF 62%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:16.5px;
  color:var(--text);
  max-width:620px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:26px;
}
.tag{
  font-size:12.5px;
  padding:5px 12px;
  border-radius:999px;
  color:#9FB0CC;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  letter-spacing:.02em;
}
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.10);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.hero-visual{
  padding:16px;
  position:relative;
  overflow:hidden;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  opacity:.10;
  pointer-events:none;
}
.hero-visual .shot{
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
  z-index:1;
}
.hero-visual .shot img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.hero-visual .visual-meta{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 6px 4px;
  font-size:13px;
  color:var(--muted);
}
.visual-meta .pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:#8EF0D6;
  font-size:12.5px;
}
.visual-meta .pill i{
  width:7px;height:7px;border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(46,211,166,.14);
  display:inline-block;
}

/* ============ 筛选 chip ============ */
.filter-bar{
  border-bottom:1px solid var(--line-soft);
  background:rgba(10,17,32,.6);
}
.filter-inner{
  display:flex;
  align-items:center;
  gap:18px;
  padding:16px 0;
}
.filter-label{
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--muted);
  flex-shrink:0;
}
.filter-chips{
  display:flex;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding-bottom:2px;
}
.filter-chips::-webkit-scrollbar{display:none;}
.filter-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 16px;
  border-radius:999px;
  font-size:13.5px;
  color:var(--muted);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  white-space:nowrap;
  transition:color var(--ease),background var(--ease),border-color var(--ease);
}
.filter-chip:hover{color:var(--text-strong);border-color:rgba(255,255,255,.2);}
.filter-chip.is-active{
  color:#fff;
  background:linear-gradient(135deg,rgba(59,98,246,.9),rgba(91,132,255,.9));
  border-color:transparent;
  box-shadow:0 8px 22px -12px rgba(59,98,246,.9);
}

/* ============ 通用板块 ============ */
.section{padding:72px 0;position:relative;}
.section-tight{padding:48px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:34px;
  flex-wrap:wrap;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.3;
}
.section-head p{
  margin:10px 0 0;
  font-size:14.5px;
  color:var(--muted);
  max-width:660px;
}
.divider{
  height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.14),rgba(255,255,255,.02));
  border:0;
  margin:0;
}

/* ============ 对照式排查段 ============ */
.compare{
  padding:64px 0;
  border-top:1px solid var(--line-soft);
}
.compare:first-of-type{border-top:0;}
.compare-grid{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:32px;
  align-items:start;
}
.compare-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:16px;
}
.section-index{
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--amber);
  padding:4px 10px;
  border-radius:8px;
  background:rgba(245,165,36,.10);
  border:1px solid rgba(245,165,36,.28);
}
.compare h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.32;
}
.compare .lead{
  font-size:15px;
  color:var(--muted);
  margin:14px 0 22px;
}
.check-list{display:grid;gap:13px;}
.check-list li{
  position:relative;
  padding-left:28px;
  font-size:15px;
  color:var(--text);
  line-height:1.75;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:14px;height:14px;
  border-radius:5px;
  background:rgba(46,211,166,.14);
  border:1px solid rgba(46,211,166,.5);
  box-shadow:inset 0 0 0 3px rgba(46,211,166,.12);
}
.check-list li strong{color:var(--text-strong);font-weight:600;}
.compare-card{
  padding:22px;
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.09);
}
.compare-card .card-shot{
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  margin-bottom:20px;
  background:var(--bg-deep);
}
.compare-card .card-shot img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .3s ease;
}
.compare-card:hover .card-shot img{transform:scale(1.03);}
.compare-card h3{
  font-size:19px;
  margin-bottom:10px;
}
.compare-card p{
  font-size:14.5px;
  color:var(--text);
  margin-bottom:16px;
}
.mini-list{
  display:grid;
  gap:10px;
  margin-bottom:18px;
  padding-top:16px;
  border-top:1px dashed rgba(255,255,255,.12);
}
.mini-list li{
  display:flex;
  gap:10px;
  font-size:13.8px;
  color:var(--muted);
  line-height:1.7;
}
.mini-list li b{
  color:var(--amber);
  font-weight:700;
  flex-shrink:0;
  font-size:12.5px;
  letter-spacing:.04em;
  padding-top:2px;
}

/* ============ 自查顺序 ============ */
.steps-wrap{
  background:rgba(15,23,41,.65);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:30px;
}
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  counter-reset:step;
}
.steps li{
  position:relative;
  padding:20px 18px 18px;
  border-radius:var(--radius);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-soft);
  counter-increment:step;
  transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.steps li:hover{
  transform:translateY(-2px);
  border-color:rgba(59,98,246,.45);
  background:rgba(59,98,246,.07);
}
.steps li::before{
  content:counter(step,decimal-leading-zero);
  display:block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--amber);
  margin-bottom:10px;
}
.steps li h3{font-size:15.5px;margin-bottom:8px;}
.steps li p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.7;}

/* ============ 指标条 ============ */
.metric-bar{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.metric-bar .metric{
  background:rgba(12,19,34,.92);
  padding:24px 26px;
}
.metric .num{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  color:var(--text-strong);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:6px;
}
.metric .num span{font-size:15px;color:var(--mint);margin-left:4px;font-weight:600;}
.metric .cap{font-size:13.5px;color:var(--muted);}

/* ============ FAQ ============ */
.faq-list{
  display:grid;
  gap:12px;
  max-width:900px;
}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(255,255,255,.04);
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item:hover{border-color:rgba(255,255,255,.18);}
.faq-item.is-open{
  border-color:rgba(59,98,246,.5);
  background:rgba(59,98,246,.07);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 22px;
  background:transparent;
  border:0;
  cursor:pointer;
  text-align:left;
  font-size:17px;
  font-weight:700;
  color:var(--text-strong);
  line-height:1.5;
}
.faq-q .arrow{
  flex-shrink:0;
  width:22px;height:22px;
  border-radius:50%;
  border:1px solid var(--line);
  position:relative;
  transition:transform .18s ease,border-color var(--ease),background var(--ease);
}
.faq-q .arrow::before{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:7px;height:7px;
  border-right:1.6px solid var(--text);
  border-bottom:1.6px solid var(--text);
  transform:translate(-50%,-68%) rotate(45deg);
}
.faq-item.is-open .faq-q .arrow{
  transform:rotate(180deg);
  border-color:rgba(59,98,246,.6);
  background:rgba(59,98,246,.16);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .18s ease;
}
.faq-a .inner{
  padding:0 22px 20px;
  font-size:15px;
  color:var(--text);
  line-height:1.85;
}
.faq-a .inner p:last-child{margin-bottom:0;}

/* ============ CTA ============ */
.cta-band{
  border-radius:var(--radius-lg);
  padding:38px 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:26px;
  flex-wrap:wrap;
  background:
    radial-gradient(520px 240px at 88% 10%,rgba(59,98,246,.28),transparent 66%),
    rgba(255,255,255,.055);
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
}
.cta-band h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:10px;}
.cta-band p{margin:0;font-size:14.5px;color:var(--muted);max-width:600px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:64px;
  border-top:1px solid var(--line);
  background:rgba(8,13,24,.85);
  padding:56px 0 26px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:38px;
  border-bottom:1px solid var(--line-soft);
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{
  font-size:13.5px;
  color:var(--muted);
  line-height:1.85;
  margin:0;
  max-width:330px;
}
.footer-col h4{
  font-size:14px;
  letter-spacing:.08em;
  color:var(--text-strong);
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul li a{
  font-size:13.5px;
  color:var(--muted);
  display:inline-block;
  transition:color var(--ease),transform var(--ease);
}
.footer-col ul li a:hover{
  color:var(--mint);
  transform:translateX(2px);
}
.footer-note{
  font-size:13px;
  color:var(--muted);
  line-height:1.85;
  margin:0;
}
.footer-note strong{color:var(--text);font-weight:600;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:12.5px;
  color:#6C7A95;
}
.footer-bottom span{line-height:1.7;}

/* ============ 响应式 ============ */
@media screen and (max-width:1200px){
  .nav-wrap{gap:4px;}
  .chip{font-size:13px;padding:7px 11px;}
}
@media screen and (max-width:1023px){
  .nav-toggle{display:inline-block;}
  .nav-wrap{
    position:fixed;
    top:72px;
    left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:16px 20px 22px;
    background:rgba(9,14,26,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s;
    z-index:55;
  }
  .site-header.is-scrolled .nav-wrap{top:60px;}
  .nav-wrap.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .chip{padding:11px 16px;font-size:14.5px;border-radius:12px;}
  .header-actions{margin-left:auto;border-left:0;padding-left:0;}
  .header-inner{gap:12px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .cat-hero{padding:112px 0 44px;}
  .compare-grid{grid-template-columns:1fr;gap:26px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media screen and (max-width:767px){
  .section{padding:52px 0;}
  .compare{padding:48px 0;}
  .metric-bar{grid-template-columns:1fr;}
  .filter-inner{flex-direction:column;align-items:flex-start;gap:12px;padding:14px 0;}
  .filter-chips{width:100%;}
  .cta-band{padding:28px 22px;}
  .steps-wrap{padding:20px;}
  .faq-q{font-size:16px;padding:16px 18px;}
  .faq-a .inner{padding:0 18px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media screen and (max-width:520px){
  .container{padding:0 18px;}
  .cat-hero h1{font-size:28px;}
  .hero-lead{font-size:15px;}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .logo-text em{display:none;}
  .steps{grid-template-columns:1fr;}
  .compare-card{padding:18px;}
  .check-list li{font-size:14.5px;}
}