/* roulang page: index */
:root{
  --brand-600:#1D5FD6;
  --brand-500:#2E77F0;
  --brand-200:#BFD5FF;
  --brand-100:#E1EBFF;
  --brand-50:#F0F5FF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E9;
  --ink-900:#101A2B;
  --ink-600:#4A5A72;
  --ink-400:#8A97AC;
  --line:#E4EAF3;
  --bg:#F7F9FD;
  --surface:#FFFFFF;
  --ok:#16A34A;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(16,26,43,.04), 0 8px 24px -12px rgba(16,26,43,.10);
  --shadow-hover:0 12px 32px -12px rgba(29,95,214,.18);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{text-decoration:underline}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:.01em;color:var(--ink-900);line-height:1.35}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-sm{padding:64px 0}
@media (max-width:1023px){
  .section{padding:64px 0}
}
@media (max-width:640px){
  .container-x{padding:0 16px}
  .section{padding:56px 0}
  .section-sm{padding:44px 0}
}

.h1{font-size:clamp(32px,4.2vw,44px);line-height:1.28}
.h2{font-size:clamp(24px,2.6vw,30px);line-height:1.34}
.h3{font-size:clamp(18px,1.7vw,20px);line-height:1.44}
.lead{font-size:17px;color:var(--ink-600);line-height:1.8}
.muted{color:var(--ink-600)}
.dim{color:var(--ink-400)}
.small{font-size:14px}
.tiny{font-size:13px}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.section-head{margin-bottom:32px}
.section-head .h2{margin-bottom:12px}
.section-head p{color:var(--ink-600);max-width:760px;margin:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(16,26,43,.28)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:none;font-weight:600;font-size:17px;color:var(--ink-900)}
.brand:hover{text-decoration:none;color:var(--brand-600)}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;color:var(--brand-600);flex:none;
}
.brand-mark svg{width:15px;height:15px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 12px;
  border-radius:8px;font-size:15px;color:var(--ink-600);white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-50);color:var(--brand-600);text-decoration:none}
.nav-links a.active{color:var(--brand-600);background:var(--brand-50)}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{position:relative;width:220px}
.search-box svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--ink-400)}
.search-box input{
  width:100%;height:40px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:#FBFCFE;padding:0 12px 0 36px;color:var(--ink-900);outline:none;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.search-box input::placeholder{color:var(--ink-400)}
.search-box input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);background:#fff}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.btn:hover{text-decoration:none}
.btn:focus-visible{outline:none;box-shadow:0 0 0 2px var(--brand-200)}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:#FF9A55;box-shadow:0 10px 26px -12px rgba(255,138,61,.55);transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--ink-600);font-size:15px}
.btn-text:hover{color:var(--brand-600);text-decoration:none}
.btn-text span{transition:transform .18s ease}
.btn-text:hover span{transform:translateY(2px)}
.btn-text .arrow{transition:transform .18s ease}
.btn-text:hover .arrow{transform:translateX(3px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:500;line-height:1;letter-spacing:.01em;
}
.badge-blue{background:var(--brand-50);color:var(--brand-600)}
.badge-accent{background:var(--accent-50);color:#C2600F}
.badge-gray{background:#EEF3FB;color:var(--ink-600)}
.badge-ok{background:#EAF7EF;color:var(--ok)}

/* ---------- cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.card-pad{padding:24px}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card-link{display:block;color:inherit}
.card-link:hover{text-decoration:none}
.card-link:hover .card-title{color:var(--brand-600)}
.card-title{font-size:17px;font-weight:600;color:var(--ink-900);transition:color .18s ease;line-height:1.5}
.thumb{
  aspect-ratio:16/9;width:100%;object-fit:cover;border-radius:var(--radius-img);
  background:#EEF3FB;
}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta-row{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);
}
.dot-sep{width:3px;height:3px;border-radius:50%;background:var(--line)}

/* ---------- hero ---------- */
.hero{padding:56px 0 44px;position:relative}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:500;margin-bottom:20px;
}
.hero h1{margin-bottom:16px}
.hero-sub{font-size:18px;color:var(--ink-600);margin-bottom:26px;max-width:520px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:30px}
.trust-bar{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.trust-item{display:flex;align-items:baseline;gap:8px;font-size:14px;color:var(--ink-600)}
.trust-item b{font-family:var(--font-mono);font-size:20px;font-weight:600;color:var(--ink-900);font-variant-numeric:tabular-nums}
.trust-div{width:1px;height:22px;background:var(--line)}
.hero-visual{position:relative}
.hero-shot{
  border-radius:16px;overflow:hidden;border:1px solid var(--line);background:var(--surface);
  box-shadow:0 2px 6px rgba(16,26,43,.04), 0 24px 48px -28px rgba(16,26,43,.28);
}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-mini{
  display:flex;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-card);
  margin:-32px 0 0 24px;position:relative;max-width:340px;
}
.hero-mini img{width:56px;height:56px;border-radius:10px;object-fit:cover;flex:none;background:#EEF3FB}
.hero-mini .mini-title{font-size:14px;font-weight:500;color:var(--ink-900);line-height:1.5}
.hero-mini .mini-sub{font-size:12px;color:var(--ink-400);margin-top:2px}
.progress{height:5px;border-radius:999px;background:var(--brand-50);overflow:hidden;margin-top:8px}
.progress i{display:block;height:100%;width:78%;border-radius:999px;background:var(--brand-500)}

/* ---------- quick entry ---------- */
.quick-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.quick-item{
  display:flex;gap:12px;align-items:flex-start;padding:20px 22px;color:inherit;
  border-right:1px solid var(--line);transition:background-color .18s ease;
}
.quick-item:last-child{border-right:none}
.quick-item:hover{background:var(--brand-50);text-decoration:none}
.quick-ico{
  width:36px;height:36px;border-radius:10px;background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;flex:none;
}
.quick-ico svg{width:18px;height:18px}
.quick-title{font-size:15px;font-weight:600;color:var(--ink-900)}
.quick-desc{font-size:13px;color:var(--ink-400);line-height:1.6;margin-top:2px}

/* ---------- pain cards ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.pain-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  border-left:3px solid var(--ink-400);padding:24px;box-shadow:var(--shadow-card);
  transition:box-shadow .18s ease, transform .18s ease;
}
.pain-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.pain-card .ico{width:22px;height:22px;color:var(--ink-400);margin-bottom:14px}
.pain-card h3{font-size:17px;margin-bottom:10px}
.pain-card p{font-size:14px;color:var(--ink-600);margin:0}

/* ---------- solution blocks ---------- */
.sol-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:36px 0}
.sol-row + .sol-row{border-top:1px dashed rgba(16,26,43,.08)}
.sol-num{
  font-family:var(--font-mono);font-size:14px;color:var(--accent-500);
  border-bottom:2px solid var(--accent-500);padding-bottom:2px;display:inline-block;margin-bottom:14px;
}
.sol-row h3{margin-bottom:12px}
.sol-row p{color:var(--ink-600);margin-bottom:18px}
.sol-img{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:#EEF3FB}
.sol-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.sol-list{margin:0 0 18px;display:grid;gap:8px}
.sol-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-600)}
.sol-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-top:10px;flex:none;
}
.sol-row.reverse .sol-text{order:2}
.sol-row.reverse .sol-media{order:1}

/* ---------- metrics ---------- */
.metrics-band{background:var(--brand-50);border-top:1px solid var(--brand-100);border-bottom:1px solid var(--brand-100)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{background:var(--surface);border:1px solid var(--brand-100);border-radius:var(--radius-card);padding:24px}
.metric b{display:block;font-family:var(--font-mono);font-size:34px;font-weight:600;color:var(--brand-600);line-height:1.1;font-variant-numeric:tabular-nums}
.metric span{display:block;font-size:14px;color:var(--ink-600);margin-top:8px}
.timeline{margin-top:40px}
.timeline-track{height:6px;border-radius:999px;background:#fff;border:1px solid var(--brand-100);position:relative;overflow:hidden}
.timeline-track i{position:absolute;left:0;top:0;bottom:0;width:72%;border-radius:999px;background:linear-gradient(90deg,var(--brand-500),#6FB0FF)}
.timeline-labels{display:flex;justify-content:space-between;margin-top:12px;font-size:13px;color:var(--ink-600);flex-wrap:wrap;gap:8px}
.timeline-labels span{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- testimonial ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:var(--shadow-card)}
.quote-mark{font-family:var(--font-mono);font-size:28px;color:var(--brand-200);line-height:1;margin-bottom:10px}
.quote-card blockquote{margin:0 0 20px;font-size:15px;color:var(--ink-600);line-height:1.85}
.quote-person{display:flex;align-items:center;gap:12px}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;flex:none;
}
.quote-name{font-size:14px;font-weight:600;color:var(--ink-900)}
.quote-role{font-size:13px;color:var(--ink-400)}

/* ---------- cms posts ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;overflow:hidden;padding:14px}
.post-card .thumb{margin-bottom:16px}
.post-card--wide .thumb{aspect-ratio:21/9}
.post-body{display:flex;flex-direction:column;flex:1;gap:10px;padding:0 6px 6px}
.post-body .card-title{margin:0}
.post-body .desc{font-size:14px;color:var(--ink-600);margin:0}
.post-foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line)}
.empty-state{
  grid-column:1/-1;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;
}
.empty-state svg{width:32px;height:32px;color:var(--ink-400);margin:0 auto 14px}
.empty-state p{color:var(--ink-600);font-size:15px;margin-bottom:18px}

/* ---------- cta ---------- */
.cta-band{
  background:var(--surface);border:1px solid var(--brand-100);border-radius:18px;
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(22px,2.2vw,26px);margin-bottom:8px}
.cta-band p{font-size:14px;color:var(--ink-600);margin:0}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .18s ease, box-shadow .18s ease}
.faq-item[open]{border-color:var(--brand-200);box-shadow:var(--shadow-card)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:500;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-600)}
.faq-item[open] summary{color:var(--brand-600)}
.faq-sign{
  width:20px;height:20px;flex:none;position:relative;transition:transform .18s ease;
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-sign::before{left:0;right:0;top:9px;height:2px}
.faq-sign::after{top:0;bottom:0;left:9px;width:2px;transition:opacity .18s ease}
.faq-item[open] .faq-sign{transform:rotate(45deg)}
.faq-item[open] .faq-sign::after{opacity:0}
.faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-600)}

/* ---------- footer ---------- */
.site-footer{background:#F2F6FC;border-top:1px solid var(--line);padding:64px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer-grid h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--ink-600)}
.footer-links a:hover{color:var(--brand-600);text-decoration:none}
.footer-brand p{font-size:14px;color:var(--ink-600);margin:14px 0 0;max-width:320px}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;display:flex;
  align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);
}

/* ---------- mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,26,43,.35);opacity:0;visibility:hidden;
  transition:opacity .2s ease, visibility .2s ease;z-index:70;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;background:var(--surface);
  z-index:80;transform:translateX(100%);transition:transform .24s ease;
  display:flex;flex-direction:column;padding:16px 20px 24px;overflow-y:auto;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .drawer{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--ink-600);cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.drawer-nav{display:grid;gap:4px;margin:12px 0 20px}
.drawer-nav a{
  display:flex;align-items:center;height:44px;padding:0 14px;border-radius:10px;
  font-size:16px;color:var(--ink-600);
}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--brand-50);color:var(--brand-600);text-decoration:none}
.drawer-actions{display:grid;gap:10px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;color:var(--ink-600);cursor:pointer;
}
.menu-toggle:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}

/* ---------- dots decoration ---------- */
.dot-bg{
  position:absolute;inset:auto auto -40px -40px;width:220px;height:220px;pointer-events:none;opacity:.06;
  background-image:radial-gradient(var(--ink-900) 1px, transparent 1px);
  background-size:14px 14px;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links,.nav-right .search-box,.nav-right .btn-ghost{display:none}
  .menu-toggle{display:flex}
  .nav-wrap{height:56px;gap:16px}
  .hero{padding:36px 0 32px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-mini{margin:-24px 0 0 16px}
  .quick-bar{grid-template-columns:repeat(2,1fr)}
  .quick-item:nth-child(2){border-right:none}
  .quick-item:nth-child(1),.quick-item:nth-child(2){border-bottom:1px solid var(--line)}
  .pain-grid,.quote-grid,.post-grid{grid-template-columns:repeat(2,1fr)}
  .pain-card:nth-child(2){margin-top:0}
  .post-card--wide{grid-column:span 2}
  .sol-row{grid-template-columns:1fr;gap:28px;padding:28px 0}
  .sol-row.reverse .sol-text{order:1}
  .sol-row.reverse .sol-media{order:2}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:640px){
  .quick-bar{grid-template-columns:1fr 1fr}
  .pain-grid,.quote-grid,.post-grid,.faq-grid,.metrics-grid{grid-template-columns:1fr}
  .post-card--wide{grid-column:span 1}
  .post-card--wide .thumb{aspect-ratio:16/9}
  .pain-card{transform:none!important;margin-top:0!important}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .trust-bar{gap:14px}
  .trust-div{display:none}
  .trust-item{width:100%}
  .hero-actions .btn{flex:1 1 auto}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --brand-600:#1D5FD6;
  --brand-500:#2E77F0;
  --brand-50:#F0F5FF;
  --brand-100:#DCE8FF;
  --brand-200:#BFD5FF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E9;
  --ink-900:#101A2B;
  --ink-600:#4A5A72;
  --ink-400:#8A97AC;
  --line:#E4EAF3;
  --bg:#F7F9FD;
  --surface:#FFFFFF;
  --ok:#16A34A;
  --warn:#D97706;
  --err:#DC2626;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-card:0 1px 2px rgba(16,26,43,.04), 0 8px 24px -12px rgba(16,26,43,.10);
  --shadow-hover:0 12px 32px -12px rgba(29,95,214,.18);
  --ease:180ms ease;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--ink-900);
  background:var(--bg);
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease);}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button,input{font-family:inherit;font-size:inherit;}
button{background:none;border:none;padding:0;color:inherit;}
:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;border-radius:8px;}
.container-x{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 22px -16px rgba(16,26,43,.35);}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-900);font-size:17px;font-weight:600;white-space:nowrap;flex:0 0 auto;}
.brand:hover{color:var(--brand-600);text-decoration:none;}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--brand-50);color:var(--brand-600);display:grid;place-items:center;flex:0 0 auto;}
.brand-mark svg{width:16px;height:16px;}
.nav-links{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0;}
.nav-links a{color:var(--ink-600);font-size:15px;padding:8px 13px;border-radius:8px;white-space:nowrap;}
.nav-links a:hover{background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.nav-links a.active{color:var(--brand-600);background:var(--brand-50);font-weight:500;}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex:0 0 auto;}
.nav-search{position:relative;display:flex;align-items:center;}
.nav-search svg{position:absolute;left:12px;width:16px;height:16px;color:var(--ink-400);pointer-events:none;}
.nav-search input{
  width:220px;height:40px;padding:0 12px 0 36px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;
  color:var(--ink-900);font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search input::placeholder{color:var(--ink-400);}
.nav-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;color:var(--ink-600);align-items:center;justify-content:center;cursor:pointer;
  transition:all var(--ease);
}
.nav-toggle:hover{background:var(--brand-50);color:var(--brand-600);border-color:var(--brand-200);}
.nav-toggle svg{width:18px;height:18px;}
.nav-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 16px 20px;}
.nav-drawer.open{display:block;}
.nav-drawer .d-search{position:relative;display:flex;align-items:center;margin-bottom:12px;}
.nav-drawer .d-search svg{position:absolute;left:12px;width:16px;height:16px;color:var(--ink-400);}
.nav-drawer .d-search input{
  width:100%;height:44px;padding:0 12px 0 36px;border:1px solid var(--line);
  border-radius:var(--r-btn);background:#fff;font-size:14px;color:var(--ink-900);
}
.nav-drawer .d-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);}
.nav-drawer a.d-link{display:flex;align-items:center;height:44px;padding:0 12px;border-radius:8px;color:var(--ink-600);font-size:15px;}
.nav-drawer a.d-link:hover,.nav-drawer a.d-link.active{background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.nav-drawer .d-actions{display:flex;gap:10px;margin-top:14px;}
.nav-drawer .d-actions .btn{flex:1;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 16px;border-radius:var(--r-btn);
  font-size:14px;font-weight:500;border:1px solid transparent;cursor:pointer;
  white-space:nowrap;transition:all var(--ease);
}
.btn:hover{text-decoration:none;}
.btn svg{width:15px;height:15px;}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-500);box-shadow:0 10px 24px -12px rgba(29,95,214,.55);transform:translateY(-1px);}
.btn-primary:active{background:var(--brand-600);transform:none;box-shadow:none;}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:#FF7A22;box-shadow:0 10px 24px -12px rgba(255,138,61,.6);transform:translateY(-1px);}
.btn-accent:active{background:var(--accent-500);transform:none;box-shadow:none;}
.btn-ghost{background:#fff;color:var(--ink-600);border-color:var(--line);}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600);}
.btn-ghost:active{background:var(--brand-50);}
.btn-text{background:none;border:none;color:var(--ink-600);padding:0;height:auto;font-weight:500;}
.btn-text:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px;}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-lg{height:46px;padding:0 22px;font-size:15px;}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:500;background:var(--brand-50);color:var(--brand-600);
}
.badge-accent{background:var(--accent-50);color:#C25A12;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--brand-50);color:var(--ink-600);font-size:13px;transition:all var(--ease);
}
.tag:hover{background:var(--brand-100);color:var(--brand-600);text-decoration:none;}

/* ---------- breadcrumb / article head ---------- */
.article-head{padding:32px 0 0;}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--ink-400);margin-bottom:20px;}
.breadcrumb a{color:var(--ink-400);}
.breadcrumb a:hover{color:var(--brand-600);text-decoration:none;}
.breadcrumb .sep{color:#C9D3E3;}
.breadcrumb .crumb-current{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-600);}
.article-title{font-size:clamp(32px,4vw,44px);line-height:1.25;max-width:900px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:18px;font-size:14px;color:var(--ink-400);}
.article-meta .num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;color:var(--ink-600);}
.article-cover{margin-top:28px;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#EEF3FB;}
.article-cover img{width:100%;aspect-ratio:21/9;object-fit:cover;background:#EEF3FB;}

/* ---------- layout ---------- */
.article-main{padding:48px 0 8px;}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
.article-col{min-width:0;}
.article-body{max-width:760px;font-size:16px;line-height:1.85;color:var(--ink-900);word-break:break-word;}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  font-size:24px;margin:40px 0 16px;padding-left:14px;position:relative;line-height:1.4;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--brand-500);
}
.article-body h3{font-size:20px;margin:28px 0 12px;}
.article-body h4{font-size:17px;margin:22px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:22px;}
.article-body li{margin-bottom:.5em;}
.article-body ul li::marker{color:var(--brand-500);}
.article-body ol li::marker{color:var(--brand-600);font-family:ui-monospace,Menlo,monospace;}
.article-body blockquote{
  margin:1.4em 0;padding:16px;border-left:3px solid var(--brand-500);
  background:var(--brand-50);border-radius:0 12px 12px 0;color:var(--ink-600);
}
.article-body blockquote p:last-child{margin:0;}
.article-body img{border-radius:12px;margin:1.4em auto;}
.article-body figure{margin:1.4em 0;}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:8px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top;}
.article-body th{background:var(--brand-50);font-weight:500;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:#EEF3FB;padding:2px 6px;border-radius:6px;font-size:14px;
}
.article-body pre{
  background:#EEF3FB;border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow-x:auto;margin:1.4em 0;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;padding:0;}

/* ---------- article footer blocks ---------- */
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;}
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px;}
.postnav-card{
  display:block;padding:18px 20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--shadow-card);transition:all var(--ease);
}
.postnav-card:hover{border-color:var(--brand-200);background:var(--brand-50);transform:translateY(-2px);box-shadow:var(--shadow-hover);text-decoration:none;}
.postnav-card .pn-label{font-size:12px;color:var(--ink-400);display:block;margin-bottom:6px;}
.postnav-card .pn-title{font-size:15px;color:var(--ink-900);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.postnav-card:hover .pn-title{color:var(--brand-600);}
.article-back{margin-top:24px;}

/* ---------- sidebar ---------- */
.article-side{min-width:0;}
.side-sticky{position:sticky;top:88px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-card);margin-bottom:20px;
}
.side-card h3{font-size:16px;margin-bottom:14px;}
.toc-list{list-style:none;font-size:14px;}
.toc-list li{margin-bottom:8px;}
.toc-list a{color:var(--ink-600);display:block;line-height:1.6;}
.toc-list a:hover{color:var(--brand-600);text-decoration:none;}
.toc-list a.lvl-3{padding-left:14px;font-size:13px;color:var(--ink-400);}
.side-links{display:flex;flex-direction:column;gap:4px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  height:40px;padding:0 12px;border-radius:8px;color:var(--ink-600);font-size:14px;
}
.side-links a:hover{background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.side-links a svg{width:14px;height:14px;color:var(--ink-400);}
.side-note{font-size:13px;color:var(--ink-400);line-height:1.7;}

/* ---------- empty state ---------- */
.empty-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;box-shadow:var(--shadow-card);max-width:760px;
}
.empty-card .ic{width:48px;height:48px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);display:grid;place-items:center;margin:0 auto 16px;}
.empty-card .ic svg{width:22px;height:22px;}
.empty-card h2{font-size:20px;margin-bottom:8px;}
.empty-card p{color:var(--ink-600);font-size:15px;margin-bottom:20px;}

/* ---------- sections ---------- */
.section{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px;}
.section-head h2{font-size:clamp(24px,2.6vw,30px);}
.section-head .sub{font-size:14px;color:var(--ink-600);margin-top:10px;}

/* ---------- related cards ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:all var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);text-decoration:none;}
.rel-card .thumb{aspect-ratio:16/9;background:#EEF3FB;overflow:hidden;}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 260ms ease;}
.rel-card:hover .thumb img{transform:scale(1.03);}
.rel-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.rel-title{
  font-size:17px;line-height:1.55;margin:10px 0 8px;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card:hover .rel-title{color:var(--brand-600);}
.rel-desc{
  font-size:14px;color:var(--ink-600);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:16px;font-size:13px;color:var(--ink-400);
  border-top:1px dashed var(--line);
}
.rel-meta .num{font-family:ui-monospace,Menlo,monospace;font-variant-numeric:tabular-nums;}

/* ---------- CTA ---------- */
.cta-card{
  background:#fff;border:1px solid var(--brand-200);border-radius:16px;
  padding:32px;display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;box-shadow:var(--shadow-card);
}
.cta-card h2{font-size:clamp(22px,2.4vw,26px);}
.cta-card p{font-size:14px;color:var(--ink-600);margin-top:8px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:#F2F6FC;border-top:1px solid var(--line);padding:56px 0 24px;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer-brand .brand{font-size:16px;}
.footer-brand p{color:var(--ink-600);font-size:14px;line-height:1.8;margin-top:12px;max-width:320px;}
.footer-grid h4{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--ink-900);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:var(--ink-600);font-size:14px;}
.footer-links a:hover{color:var(--brand-600);}
.small{font-size:13px;}
.dim{color:var(--ink-400);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-search{display:none;}
  .nav-actions .btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{height:56px;}
  .article-grid{grid-template-columns:1fr;gap:32px;}
  .side-sticky{position:static;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:48px 0;}
}
@media (max-width:640px){
  .container-x{padding:0 16px;}
  .article-head{padding-top:24px;}
  .article-title{font-size:clamp(28px,7vw,34px);}
  .article-main{padding-top:32px;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .postnav{grid-template-columns:1fr;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-card{padding:24px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .section{padding:40px 0;}
}

/* roulang page: category1 */
:root{
  --brand-600:#1D5FD6;
  --brand-500:#2E77F0;
  --brand-100:#E1ECFF;
  --brand-50:#F0F5FF;
  --brand-200:#BFD5FF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E9;
  --ink-900:#101A2B;
  --ink-600:#4A5A72;
  --ink-400:#8A97AC;
  --line:#E4EAF3;
  --bg:#F7F9FD;
  --surface:#FFFFFF;
  --ok:#16A34A;
  --warn:#D97706;
  --err:#DC2626;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(16,26,43,.04), 0 8px 24px -12px rgba(16,26,43,.10);
  --shadow-hover:0 12px 32px -12px rgba(29,95,214,.18);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-500)}
button,input{font:inherit}
ul,ol{margin:0;padding:0}
.icon{width:1em;height:1em;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- 容器 ---------- */
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:1024px){.container-x{padding:0 32px}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .18s ease}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(16,26,43,.32)}
.header-inner{display:flex;align-items:center;gap:18px;height:56px}
@media (min-width:1024px){.header-inner{height:64px;gap:28px}}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900)}
.brand:hover{color:var(--ink-900)}
.brand-mark{width:24px;height:24px;border-radius:8px;background:var(--brand-50);color:var(--brand-600);display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--brand-200);flex:0 0 auto}
.brand-mark .icon{width:15px;height:15px}
.brand-name{font-size:17px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.nav-links{display:none}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:4px;flex:1}
  .nav-links a{font-size:15px;color:var(--ink-600);padding:8px 12px;border-radius:8px;position:relative;white-space:nowrap}
  .nav-links a:hover{background:var(--brand-50);color:var(--brand-600)}
  .nav-links a.active{color:var(--brand-600);background:var(--brand-50)}
  .nav-links a.active::after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:18px;height:2px;border-radius:2px;background:var(--brand-600)}
}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{align-items:center;gap:8px;height:38px;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;transition:border-color .18s ease,box-shadow .18s ease}
.search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100)}
.search-box input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink-900)}
.search-box input::placeholder{color:var(--ink-400)}
.search-icon{width:16px;height:16px;color:var(--ink-400);flex:0 0 auto}
.search-desktop{display:none}
@media (min-width:1024px){.search-desktop{display:flex;width:220px}}
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--radius-btn);border:1px solid var(--line);background:#fff;color:var(--ink-600);cursor:pointer;transition:background-color .18s ease,border-color .18s ease,color .18s ease}
.menu-toggle:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.menu-toggle:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px}
@media (min-width:1024px){.menu-toggle{display:none}}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:16px 0 22px}
.mobile-drawer.is-open{display:block}
@media (min-width:1024px){.mobile-drawer{display:none !important}}
.drawer-search{display:flex;margin-bottom:14px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:16px}
.drawer-nav a{display:flex;align-items:center;height:44px;padding:0 12px;border-radius:var(--radius-btn);color:var(--ink-600);font-size:15px}
.drawer-nav a:hover{background:var(--brand-50);color:var(--brand-600)}
.drawer-nav a.active{background:var(--brand-50);color:var(--brand-600)}
.drawer-actions{display:flex;flex-direction:column;gap:10px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:40px;padding:0 16px;border-radius:var(--radius-btn);font-size:15px;font-weight:500;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease}
.btn:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px}
.btn .icon{width:16px;height:16px}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);color:#fff;box-shadow:0 10px 22px -12px rgba(29,95,214,.7);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:#F97B2A;color:#fff;box-shadow:0 10px 22px -12px rgba(255,138,61,.75);transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0);box-shadow:none}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-secondary:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.btn-secondary:active{transform:translateY(0)}
.btn-sm{height:36px;padding:0 14px;font-size:14px}
.btn-lg{height:48px;padding:0 22px;font-size:16px}
.btn-text{background:none;border:0;padding:0;height:auto;color:var(--ink-600);font-weight:500}
.btn-text:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:500;background:var(--brand-50);color:var(--brand-600);border:1px solid var(--brand-200);white-space:nowrap}
.badge-accent{background:var(--accent-50);color:#C2570F;border-color:#FFD9BE}
.badge-plain{background:#F2F6FC;color:var(--ink-600);border-color:var(--line)}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--ink-400);margin-bottom:18px}
.breadcrumb a{color:var(--ink-400)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .current{color:var(--ink-600);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 页面头部 ---------- */
.page-hero{background:#fff;border-bottom:1px solid var(--line);padding:32px 0 0}
@media (min-width:1024px){.page-hero{padding:52px 0 0}}
.hero-grid{display:grid;gap:28px;align-items:center;padding-bottom:32px}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;padding-bottom:44px}}
.page-title{font-size:clamp(32px,4.4vw,44px);line-height:1.25;font-weight:600;letter-spacing:0;margin:14px 0 12px;color:var(--ink-900)}
.page-lead{font-size:16px;line-height:1.8;color:var(--ink-600);margin:0;max-width:760px}
.hero-media{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#EEF3FB;aspect-ratio:16/10;box-shadow:var(--shadow-card)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;font-size:14px;color:var(--ink-600)}
.hero-points span{display:inline-flex;align-items:center;gap:7px}
.hero-points .icon{width:15px;height:15px;color:var(--ok)}
.hero-points .num{font-family:var(--mono);color:var(--ink-900);font-weight:500}

/* ---------- 锚点条 ---------- */
.anchor-bar{display:flex;gap:10px;overflow-x:auto;padding:18px 0 20px;scrollbar-width:none}
.anchor-bar::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink-600);font-size:14px;white-space:nowrap;transition:background-color .18s ease,border-color .18s ease,color .18s ease}
.chip:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.chip.is-active:hover{color:#fff}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:88px 0}}
.section-tint{background:var(--brand-50)}
.section-white{background:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.section-title{font-size:clamp(24px,2.6vw,30px);line-height:1.35;font-weight:600;letter-spacing:0;margin:0;color:var(--ink-900)}
.section-sub{margin:10px 0 0;font-size:15px;line-height:1.8;color:var(--ink-600);max-width:660px}
.section-meta{font-size:13px;color:var(--ink-400);font-family:var(--mono)}

/* ---------- 横向通道列表 ---------- */
.channel-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden}
.channel-row{display:grid;gap:18px;padding:20px;border-bottom:1px dashed var(--line);transition:background-color .18s ease}
.channel-row:last-child{border-bottom:0}
.channel-row:hover{background:var(--brand-50)}
@media (min-width:768px){.channel-row{grid-template-columns:240px 1fr;gap:26px;padding:24px}}
.row-media{border-radius:var(--radius-img);overflow:hidden;background:#EEF3FB;aspect-ratio:4/3}
.row-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.channel-row:hover .row-media img{transform:scale(1.03)}
.row-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.row-title{font-size:17px;line-height:1.5;font-weight:600;margin:0 0 10px;letter-spacing:0}
.row-title a{color:var(--ink-900)}
.channel-row:hover .row-title a{color:var(--brand-600)}
.row-desc{font-size:15px;line-height:1.85;color:var(--ink-600);margin:0 0 8px}
.row-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:10px;font-size:13px;color:var(--ink-400)}
.row-meta .idx{font-family:var(--mono);color:var(--brand-600);font-weight:500}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card)}
.data-table{width:100%;border-collapse:collapse;min-width:660px;font-size:15px}
.data-table th{background:var(--brand-50);color:var(--ink-900);font-weight:600;text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap}
.data-table td{padding:16px 18px;border-bottom:1px solid var(--line);color:var(--ink-600);line-height:1.75;vertical-align:top}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover{background:#FAFCFF}
.data-table td:first-child{color:var(--ink-900);font-weight:500}

/* ---------- 步骤条 ---------- */
.step-strip{list-style:none;display:grid;gap:16px}
@media (min-width:640px){.step-strip{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.step-strip{grid-template-columns:repeat(4,1fr)}}
.step-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-card);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.step-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-200)}
.step-num{display:inline-block;font-family:var(--mono);font-size:13px;font-weight:500;color:var(--accent-500);letter-spacing:.06em;padding-bottom:6px;border-bottom:2px solid var(--accent-500);margin-bottom:12px}
.step-title{font-size:17px;font-weight:600;line-height:1.5;margin:0 0 8px;color:var(--ink-900)}
.step-desc{font-size:14px;line-height:1.8;color:var(--ink-600);margin:0}

/* ---------- CTA ---------- */
.cta-card{display:flex;flex-direction:column;gap:20px;background:#fff;border:1px solid var(--brand-200);border-radius:16px;padding:28px;box-shadow:var(--shadow-card)}
@media (min-width:768px){.cta-card{flex-direction:row;align-items:center;justify-content:space-between;padding:34px 38px}}
.cta-title{font-size:clamp(20px,2.2vw,26px);line-height:1.4;font-weight:600;margin:0 0 8px;color:var(--ink-900)}
.cta-desc{margin:0;font-size:14px;line-height:1.8;color:var(--ink-600);max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;gap:14px}
@media (min-width:1024px){.faq-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 20px;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item:hover{border-color:var(--brand-200);box-shadow:var(--shadow-card)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;font-size:16px;font-weight:500;color:var(--ink-900);line-height:1.6}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--mono);font-size:18px;line-height:1;color:var(--ink-400);transition:transform .2s ease,color .2s ease;flex:0 0 auto}
.faq-item[open] summary{color:var(--brand-600)}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--brand-600)}
.faq-item summary:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;border-radius:8px}
.faq-answer{padding:0 0 18px;margin:0;font-size:15px;line-height:1.85;color:var(--ink-600)}

/* ---------- 页脚 ---------- */
.site-footer{background:#F2F6FC;border-top:1px solid var(--line);padding:52px 0 24px}
@media (min-width:1024px){.site-footer{padding:64px 0 26px}}
.footer-grid{display:grid;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--ink-600);margin:0;max-width:340px}
.site-footer h4{font-size:15px;font-weight:600;margin:0 0 14px;color:var(--ink-900);letter-spacing:0}
.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.footer-links a{font-size:14px;color:var(--ink-600)}
.footer-links a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.small{font-size:13px}
.dim{color:var(--ink-400)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;border-top:1px solid var(--line);margin-top:36px;padding-top:20px;font-size:13px;color:var(--ink-400)}

/* roulang page: category2 */
:root{
  --brand-600:#1D5FD6;
  --brand-500:#2E77F0;
  --brand-100:#DCE8FF;
  --brand-50:#F0F5FF;
  --brand-200:#BFD5FF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E9;
  --ink-900:#101A2B;
  --ink-600:#4A5A72;
  --ink-400:#8A97AC;
  --line:#E4EAF3;
  --bg:#F7F9FD;
  --surface:#FFFFFF;
  --ok:#16A34A;
  --warn:#D97706;
  --err:#DC2626;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(16,26,43,.04), 0 8px 24px -12px rgba(16,26,43,.10);
  --sh-hover:0 12px 32px -12px rgba(29,95,214,.18);
  --sec-y-desktop:88px;
  --sec-y-mobile:56px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-weight:400;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-500);text-decoration:underline;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:600;letter-spacing:.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;}

.container-x{max-width:1200px;margin:0 auto;padding:0 32px;}
.read-x{max-width:760px;}
.sec{padding:var(--sec-y-desktop) 0;}
.sec-tight{padding:56px 0;}
.sec-title{font-size:clamp(24px,2.4vw,30px);line-height:1.35;}
.sec-sub{margin-top:12px;color:var(--ink-600);font-size:15px;max-width:660px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.site-header.scrolled{box-shadow:0 6px 20px -14px rgba(16,26,43,.28);}
.header-inner{display:flex;align-items:center;gap:28px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);font-size:17px;font-weight:600;line-height:1.2;}
.brand:hover{text-decoration:none;color:var(--brand-600);}
.brand-mark{width:24px;height:24px;border-radius:8px;background:var(--brand-50);border:1px solid var(--brand-200);display:inline-flex;align-items:center;justify-content:center;flex:none;}
.brand-mark svg{width:14px;height:14px;fill:var(--brand-600);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-links a{position:relative;display:inline-block;padding:8px 12px;border-radius:8px;font-size:15px;color:var(--ink-600);white-space:nowrap;}
.nav-links a:hover{background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.nav-links a.active{color:var(--brand-600);font-weight:500;background:var(--brand-50);}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand-600);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{position:relative;width:220px;}
.search-box svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:15px;height:15px;stroke:var(--ink-400);fill:none;stroke-width:1.8;}
.search-box input{width:100%;height:40px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);padding:0 12px 0 34px;font-size:14px;color:var(--ink-900);transition:border-color .18s ease,box-shadow .18s ease;}
.search-box input::placeholder{color:var(--ink-400);}
.search-box input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:500;border:1px solid transparent;transition:all .18s ease;white-space:nowrap;}
.btn:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-500);box-shadow:0 10px 24px -12px rgba(29,95,214,.55);transform:translateY(-1px);color:#fff;text-decoration:none;}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:#F97A28;box-shadow:0 10px 24px -12px rgba(255,138,61,.6);transform:translateY(-1px);color:#fff;text-decoration:none;}
.btn-accent:active{transform:translateY(0);box-shadow:none;}
.btn-accent svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--ink-900);}
.btn-secondary:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.btn-secondary:active{background:var(--brand-100);}
.btn-text{display:inline-flex;align-items:center;gap:6px;height:auto;padding:0;border:0;background:none;color:var(--ink-600);font-size:15px;font-weight:500;}
.btn-text:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.btn-text svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .18s ease;}
.btn-text:hover svg{transform:translateX(3px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;align-items:center;justify-content:center;}
.nav-toggle svg{width:18px;height:18px;stroke:var(--ink-900);fill:none;stroke-width:1.8;}
.mobile-drawer{display:none;}

/* ---------- badges / pills ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:500;background:var(--brand-50);color:var(--brand-600);border:1px solid var(--brand-200);}
.badge-accent{background:var(--accent-50);color:#C2610F;border-color:#FFD9BE;}
.badge-soft{background:#F2F6FC;color:var(--ink-600);border-color:var(--line);}
.pill-bar{display:flex;gap:10px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:none;}
.pill-bar::-webkit-scrollbar{display:none;}
.pill{flex:none;display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;color:var(--ink-600);font-size:14px;transition:all .18s ease;}
.pill:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600);text-decoration:none;}
.pill.is-current{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);padding:18px 0 0;}
.crumb a{color:var(--ink-400);}
.crumb a:hover{color:var(--brand-600);text-decoration:none;}
.crumb .sep{color:#C7D2E2;}
.crumb .now{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-600);}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:#fff;}
.page-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.09;}
.page-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px);opacity:.6;}
.page-hero .hero-inner{position:relative;z-index:1;padding:40px 0 44px;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-600);background:var(--brand-50);border:1px solid var(--brand-200);border-radius:var(--r-pill);padding:4px 12px;}
.hero-h1{margin-top:18px;font-size:clamp(32px,3.6vw,44px);line-height:1.28;max-width:900px;}
.hero-h1 .hl{color:var(--brand-600);}
.hero-lead{margin-top:14px;color:var(--ink-600);font-size:16px;max-width:720px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:26px;}
.hero-meta .m{display:flex;flex-direction:column;gap:2px;padding-right:26px;border-right:1px solid var(--line);}
.hero-meta .m:last-child{border-right:0;padding-right:0;}
.hero-meta .m b{font-size:22px;font-weight:600;color:var(--ink-900);font-family:var(--mono);}
.hero-meta .m span{font-size:13px;color:var(--ink-400);}

/* ---------- cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;}
.card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);border-color:var(--brand-200);}
.card-body{padding:22px;}
.card-title{font-size:17px;line-height:1.5;margin-top:12px;}
.card:hover .card-title{color:var(--brand-600);}
.card-text{margin-top:10px;color:var(--ink-600);font-size:15px;line-height:1.8;}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink-400);}
.card-meta .mono{font-size:13px;}
.thumb{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);background:#EEF3FB;}
.line-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.line-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- login grid (category2) ---------- */
.login-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.card-feature{grid-column:span 2;}
.card-feature .card-body{padding:24px;}
.feature-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:center;}
.feature-tag{display:inline-flex;align-items:center;gap:6px;}
.feature-list{margin-top:14px;display:grid;gap:8px;}
.feature-list li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-600);line-height:1.75;}
.feature-list li::before{content:"";position:absolute;left:4px;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);}
.mini-progress{height:6px;border-radius:var(--r-pill);background:#EEF3FB;overflow:hidden;margin-top:16px;}
.mini-progress i{display:block;height:100%;width:64%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--brand-500),#6FB0FF);}

/* ---------- table ---------- */
.table-wrap{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-card);overflow-x:auto;}
table.rec{width:100%;border-collapse:collapse;min-width:720px;}
table.rec th,table.rec td{padding:14px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);vertical-align:top;}
table.rec th{background:var(--brand-50);color:var(--ink-900);font-weight:600;font-size:14px;white-space:nowrap;}
table.rec td:first-child{color:var(--ink-900);font-weight:500;white-space:nowrap;}
table.rec td{color:var(--ink-600);}
table.rec tr:last-child td{border-bottom:0;}
.tag-ok{color:var(--ok);font-weight:500;}
.tag-warn{color:var(--warn);font-weight:500;}
.tag-err{color:var(--err);font-weight:500;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-card);transition:box-shadow .18s ease,transform .18s ease;}
.step-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);}
.step-num{font-family:var(--mono);font-size:15px;font-weight:600;color:var(--brand-600);border-bottom:2px solid var(--accent-500);display:inline-block;padding-bottom:4px;}
.step-card h3{margin-top:16px;font-size:18px;}
.step-card p{margin-top:10px;color:var(--ink-600);font-size:15px;}

/* ---------- cta ---------- */
.cta-box{background:#fff;border:1px solid var(--brand-50);border-radius:16px;box-shadow:var(--sh-card);padding:32px;display:flex;align-items:center;justify-content:space-between;gap:28px;}
.cta-box h2{font-size:clamp(20px,2vw,24px);}
.cta-box p{margin-top:8px;color:var(--ink-600);font-size:14px;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;}
.faq-item:hover{border-color:var(--brand-200);}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:16px;font-weight:500;color:var(--ink-900);cursor:pointer;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item[open] summary{color:var(--brand-600);}
.faq-icon{position:relative;width:16px;height:16px;flex:none;transition:transform .2s ease;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-600);border-radius:2px;}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{padding:0 20px 18px;color:var(--ink-600);font-size:15px;line-height:1.8;}
.faq-body p+p{margin-top:10px;}

/* ---------- footer ---------- */
.site-footer{background:#F2F6FC;border-top:1px solid var(--line);margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding:56px 0 36px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{color:var(--ink-600);font-size:14px;max-width:320px;}
.site-footer h4{font-size:15px;margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:var(--ink-600);font-size:14px;}
.footer-links a:hover{color:var(--brand-600);}
.footer-links .small{font-size:13px;color:var(--ink-400);}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding:18px 0;font-size:13px;color:var(--ink-400);}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .container-x{padding:0 24px;}
  .nav-links,.search-box,.header-actions .btn-secondary{display:none;}
  .nav-toggle{display:inline-flex;}
  .login-grid{grid-template-columns:repeat(2,1fr);}
  .card-feature{grid-column:span 2;}
  .feature-inner{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .mobile-drawer.open{display:block;position:fixed;inset:56px 0 0;background:#fff;z-index:59;overflow-y:auto;padding:16px 24px 28px;border-top:1px solid var(--line);}
  .drawer-search{position:relative;margin-bottom:16px;}
  .drawer-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:15px;height:15px;stroke:var(--ink-400);fill:none;stroke-width:1.8;}
  .drawer-search input{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 12px 0 34px;font-size:15px;}
  .drawer-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);}
  .drawer-links{display:flex;flex-direction:column;}
  .drawer-links a{height:44px;display:flex;align-items:center;font-size:16px;color:var(--ink-900);border-bottom:1px solid var(--line);}
  .drawer-links a.active{color:var(--brand-600);}
  .drawer-actions{display:flex;gap:12px;margin-top:20px;}
  .drawer-actions .btn{flex:1;}
}
@media (max-width:767px){
  :root{--sec-y-desktop:64px;}
  .header-inner{height:56px;gap:12px;}
  .brand{font-size:16px;}
  .logo-text-long{display:none;}
  .hero-meta .m{padding-right:18px;}
  .steps{grid-template-columns:1fr;}
  .cta-box{flex-direction:column;align-items:flex-start;padding:24px;}
  .cta-box .btn{width:100%;}
}
@media (max-width:639px){
  .container-x{padding:0 16px;}
  .sec{padding:56px 0;}
  .sec-tight{padding:44px 0;}
  .login-grid{grid-template-columns:1fr;}
  .card-feature{grid-column:span 1;}
  .hero-h1{font-size:30px;}
  .footer-grid{grid-template-columns:1fr;}
  .card-body{padding:20px;}
}

/* roulang page: category3 */
:root{
    --brand-600:#1D5FD6;
    --brand-500:#2E77F0;
    --brand-100:#DCE8FF;
    --brand-50:#F0F5FF;
    --brand-200:#BFD5FF;
    --accent-500:#FF8A3D;
    --accent-50:#FFF3E9;
    --ink-900:#101A2B;
    --ink-600:#4A5A72;
    --ink-400:#8A97AC;
    --line:#E4EAF3;
    --bg:#F7F9FD;
    --surface:#FFFFFF;
    --ok:#16A34A;
    --warn:#D97706;
    --err:#DC2626;
    --radius-card:14px;
    --radius-btn:10px;
    --radius-img:12px;
    --shadow-card:0 1px 2px rgba(16,26,43,.04),0 8px 24px -12px rgba(16,26,43,.10);
    --shadow-hover:0 12px 32px -12px rgba(29,95,214,.18);
    --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    color:var(--ink-900);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
  a:hover{color:var(--brand-500);}
  button{font-family:inherit;}
  h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:.01em;font-weight:600;}
  p{margin:0 0 1.15em;}
  ul,ol{margin:0;padding:0;list-style:none;}
  svg{display:block;}
  .mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
  .container-x{max-width:1200px;margin:0 auto;padding:0 32px;width:100%;}
  .section{padding:88px 0;}
  .section-tight{padding:56px 0;}
  .muted{color:var(--ink-600);}
  .dim{color:var(--ink-400);}
  .small{font-size:14px;}
  .tiny{font-size:13px;}

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .18s ease;
  }
  .site-header.scrolled{box-shadow:0 8px 22px -16px rgba(16,26,43,.35);}
  .header-inner{display:flex;align-items:center;gap:18px;height:64px;}
  .brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:var(--ink-900);white-space:nowrap;}
  .brand:hover{color:var(--brand-600);}
  .brand-mark{
    width:26px;height:26px;border-radius:8px;
    background:var(--brand-50);color:var(--brand-600);
    display:grid;place-items:center;flex:0 0 auto;
  }
  .brand-mark svg{width:15px;height:15px;}
  .nav-links{display:flex;align-items:center;gap:4px;}
  .nav-links a{
    position:relative;
    padding:8px 12px;border-radius:8px;
    font-size:15px;color:var(--ink-600);
    transition:background .18s ease,color .18s ease;
  }
  .nav-links a:hover{background:var(--brand-50);color:var(--brand-600);}
  .nav-links a.active{background:var(--brand-50);color:var(--brand-600);font-weight:500;}
  .nav-links a.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
    border-radius:2px;background:var(--brand-600);
  }
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
  .search-box{position:relative;width:220px;}
  .search-box svg{
    position:absolute;left:11px;top:50%;transform:translateY(-50%);
    width:15px;height:15px;color:var(--ink-400);
  }
  .search-box input{
    height:38px;width:100%;
    padding:0 12px 0 34px;
    border:1px solid var(--line);border-radius:var(--radius-btn);
    background:#fff;color:var(--ink-900);font-size:14px;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .search-box input::placeholder{color:var(--ink-400);}
  .search-box input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100);}
  .nav-toggle{
    display:none;width:40px;height:40px;margin-left:auto;
    border:1px solid var(--line);border-radius:var(--radius-btn);
    background:#fff;color:var(--ink-600);place-items:center;cursor:pointer;
    transition:background .18s ease,border-color .18s ease;
  }
  .nav-toggle:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600);}
  .nav-toggle:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;}
  .nav-toggle svg{width:18px;height:18px;}
  .mobile-drawer{
    display:none;
    border-top:1px solid var(--line);
    background:#fff;padding:16px 32px 20px;
  }
  .mobile-drawer.open{display:block;}
  .mobile-drawer .search-box{width:100%;margin-bottom:12px;}
  .mobile-drawer .drawer-links{display:flex;flex-direction:column;}
  .mobile-drawer .drawer-links a{
    height:44px;display:flex;align-items:center;
    padding:0 12px;border-radius:8px;font-size:15px;color:var(--ink-600);
  }
  .mobile-drawer .drawer-links a:hover{background:var(--brand-50);color:var(--brand-600);}
  .mobile-drawer .drawer-links a.active{background:var(--brand-50);color:var(--brand-600);font-weight:500;}
  .drawer-actions{display:flex;gap:10px;margin-top:14px;}
  .drawer-actions .btn{flex:1;justify-content:center;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    height:42px;padding:0 18px;
    border:1px solid transparent;border-radius:var(--radius-btn);
    font-size:15px;font-weight:500;line-height:1;
    cursor:pointer;white-space:nowrap;
    transition:background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
  }
  .btn svg{width:15px;height:15px;}
  .btn-sm{height:36px;padding:0 14px;font-size:14px;}
  .btn-primary{background:var(--brand-600);color:#fff;}
  .btn-primary:hover{background:var(--brand-500);color:#fff;box-shadow:0 10px 22px -12px rgba(29,95,214,.6);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);box-shadow:none;}
  .btn-primary:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;}
  .btn-primary:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
  .btn-accent{background:var(--accent-500);color:#fff;}
  .btn-accent:hover{background:#f07b2b;color:#fff;box-shadow:0 10px 22px -12px rgba(255,138,61,.7);transform:translateY(-1px);}
  .btn-accent:active{transform:translateY(0);box-shadow:none;}
  .btn-accent:focus-visible{outline:2px solid #FFD7B8;outline-offset:2px;}
  .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900);}
  .btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600);}
  .btn-ghost:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;}
  .btn-text{
    display:inline-flex;align-items:center;gap:4px;
    height:auto;padding:0;border:0;background:none;
    color:var(--ink-600);font-size:15px;font-weight:500;
    transition:color .18s ease;
  }
  .btn-text:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px;}
  .btn-text svg{width:14px;height:14px;}
  .btn-text:focus-visible{outline:2px solid var(--brand-200);outline-offset:3px;border-radius:4px;}

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    height:24px;padding:0 10px;border-radius:999px;
    font-size:12px;font-weight:500;line-height:1;
    background:var(--brand-50);color:var(--brand-600);
    border:1px solid var(--brand-200);
  }
  .badge-accent{background:var(--accent-50);color:#B65B1C;border-color:#FFDCC2;}
  .badge-plain{background:#fff;color:var(--ink-600);border-color:var(--line);}
  .chip-row{
    display:flex;gap:10px;overflow-x:auto;padding:4px 0 2px;
    scrollbar-width:thin;-webkit-overflow-scrolling:touch;
  }
  .chip{
    display:inline-flex;align-items:center;flex:0 0 auto;
    height:34px;padding:0 14px;border-radius:999px;
    border:1px solid var(--line);background:#fff;
    font-size:14px;color:var(--ink-600);
    transition:background .18s ease,border-color .18s ease,color .18s ease;
  }
  .chip:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600);}
  .chip.current{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
  .chip.current:hover{background:var(--brand-500);border-color:var(--brand-500);color:#fff;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{
    display:flex;align-items:center;gap:8px;
    padding:20px 0 0;
    font-size:14px;color:var(--ink-400);
  }
  .breadcrumb a{color:var(--ink-400);}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:var(--line);}
  .breadcrumb .crumbb-current{
    max-width:320px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
    color:var(--ink-600);
  }

  /* ---------- 页面头部 ---------- */
  .page-hero{padding:32px 0 0;}
  .page-hero h1{
    font-size:clamp(32px,4.2vw,44px);
    line-height:1.3;
    margin:16px 0 12px;
  }
  .page-hero .lead{
    max-width:760px;font-size:17px;color:var(--ink-600);margin:0 0 22px;
  }
  .hero-facts{
    display:flex;flex-wrap:wrap;gap:0;
    border-top:1px solid var(--line);
    padding-top:18px;margin-top:6px;
  }
  .hero-facts .fact{
    padding:0 22px;border-left:1px solid var(--line);
  }
  .hero-facts .fact:first-child{padding-left:0;border-left:0;}
  .hero-facts .fact b{
    display:block;font-family:var(--font-mono);font-size:20px;font-weight:600;color:var(--ink-900);
  }
  .hero-facts .fact span{font-size:13px;color:var(--ink-400);}

  /* ---------- 两栏布局 ---------- */
  .layout-2col{
    display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);
    gap:32px;align-items:start;
  }
  .panel{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
  }
  .panel-head{
    display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
    padding:22px 24px 0;
  }
  .panel-body{padding:20px 24px 24px;}
  .section-head{margin-bottom:26px;}
  .section-head h2{
    font-size:clamp(24px,2.6vw,30px);
    line-height:1.35;
  }
  .section-head p{margin:10px 0 0;color:var(--ink-600);font-size:15px;max-width:720px;}
  .head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}

  /* ---------- 大卡（带编号角标） ---------- */
  .card-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .big-card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    padding:24px;
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .big-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-hover);
    border-color:var(--brand-200);
  }
  .big-card:hover h3{color:var(--brand-600);}
  .big-card .index{
    display:inline-flex;align-items:center;gap:8px;
    font-family:var(--font-mono);font-size:13px;font-weight:600;
    color:var(--brand-600);letter-spacing:.04em;
  }
  .big-card .index::after{
    content:"";display:block;width:26px;height:2px;border-radius:2px;background:var(--accent-500);
  }
  .big-card h3{
    font-size:17px;line-height:1.55;margin:12px 0 10px;
    transition:color .18s ease;
  }
  .big-card p{font-size:15px;color:var(--ink-600);margin:0 0 16px;}
  .big-card .meta{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    border-top:1px dashed var(--line);padding-top:14px;
    font-size:13px;color:var(--ink-400);
  }
  .big-card .media{
    margin-top:18px;border-radius:var(--radius-img);overflow:hidden;background:#EEF3FB;
    aspect-ratio:16/9;
  }
  .big-card .media img{width:100%;height:100%;object-fit:cover;}

  /* ---------- 侧栏 ---------- */
  .sidebar{display:grid;gap:20px;position:sticky;top:84px;}
  .side-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    padding:22px;
  }
  .side-card h3{font-size:16px;margin-bottom:14px;}
  .quick-list{display:grid;gap:8px;}
  .quick-list a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:11px 12px;border-radius:10px;
    border:1px solid var(--line);background:#fff;
    font-size:14px;color:var(--ink-900);
    transition:background .18s ease,border-color .18s ease,color .18s ease;
  }
  .quick-list a:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600);}
  .quick-list a svg{width:14px;height:14px;color:var(--ink-400);flex:0 0 auto;}
  .quick-list a:hover svg{color:var(--brand-600);}
  .side-links{display:grid;gap:10px;}
  .side-links a{
    display:flex;align-items:center;justify-content:space-between;
    font-size:14px;color:var(--ink-600);
    padding-bottom:10px;border-bottom:1px solid var(--line);
  }
  .side-links a:last-child{border-bottom:0;padding-bottom:0;}
  .side-links a:hover{color:var(--brand-600);}
  .side-links a span:last-child{color:var(--ink-400);font-family:var(--font-mono);font-size:12px;}
  .progress-wrap{margin-top:14px;}
  .progress-bar{
    height:6px;border-radius:999px;background:#EEF3FB;overflow:hidden;
  }
  .progress-bar i{
    display:block;height:100%;width:72%;border-radius:999px;
    background:linear-gradient(135deg,#2E77F0,#6FB0FF);
  }
  .progress-note{
    display:flex;justify-content:space-between;margin-top:8px;
    font-size:12px;color:var(--ink-400);font-family:var(--font-mono);
  }

  /* ---------- 表格 ---------- */
  .table-scroll{overflow-x:auto;border-radius:var(--radius-img);}
  table.data-table{
    width:100%;min-width:560px;border-collapse:collapse;
    font-size:14.5px;
  }
  table.data-table th,table.data-table td{
    border:1px solid var(--line);
    padding:12px 14px;text-align:left;vertical-align:top;
  }
  table.data-table th{
    background:var(--brand-50);color:var(--ink-900);font-weight:500;
  }
  table.data-table td{color:var(--ink-600);}
  table.data-table tbody tr:hover td{background:#FAFCFF;}
  .dot-ok,.dot-warn{display:inline-block;width:8px;height:8px;border-radius:999px;margin-right:8px;}
  .dot-ok{background:var(--ok);}
  .dot-warn{background:var(--warn);}

  /* ---------- 步骤序列 ---------- */
  .step-list{display:grid;gap:14px;}
  .step-item{
    display:grid;grid-template-columns:auto 1fr;gap:16px;
    padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius-card);
    background:var(--surface);
    transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  }
  .step-item:hover{border-color:var(--brand-200);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .step-item .num{
    font-family:var(--font-mono);font-size:14px;font-weight:600;color:var(--brand-600);
    padding-top:2px;
  }
  .step-item h3{font-size:16px;margin-bottom:6px;}
  .step-item p{font-size:14.5px;color:var(--ink-600);margin:0;}

  /* ---------- 指标条 ---------- */
  .metrics{
    background:var(--brand-50);
    border:1px solid var(--brand-200);
    border-radius:16px;
    padding:28px 26px;
  }
  .metrics h2{font-size:clamp(22px,2.4vw,26px);margin-bottom:8px;}
  .metrics .metrics-note{font-size:14px;color:var(--ink-600);margin:0 0 22px;}
  .metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
  .metric{
    background:#fff;border:1px solid var(--line);border-radius:12px;
    padding:18px 18px 16px;
  }
  .metric .num{
    font-family:var(--font-mono);font-size:26px;font-weight:600;color:var(--brand-600);
    line-height:1.2;
  }
  .metric .label{font-size:14px;font-weight:500;color:var(--ink-900);margin-top:8px;}
  .metric .desc{font-size:13px;color:var(--ink-400);margin-top:4px;}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
  .faq-item{
    border:1px solid var(--line);border-radius:12px;background:#fff;
    padding:0 20px;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .faq-item:hover{border-color:var(--brand-200);box-shadow:var(--shadow-card);}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    padding:18px 0;
    font-size:16px;font-weight:500;color:var(--ink-900);
    transition:color .18s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand-600);}
  .faq-item summary:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px;border-radius:8px;}
  .faq-item .plus{
    position:relative;flex:0 0 auto;width:16px;height:16px;
    transition:transform .18s ease;
  }
  .faq-item .plus::before,.faq-item .plus::after{
    content:"";position:absolute;background:var(--brand-600);border-radius:2px;
  }
  .faq-item .plus::before{left:0;right:0;top:7px;height:2px;}
  .faq-item .plus::after{top:0;bottom:0;left:7px;width:2px;transition:opacity .18s ease;}
  .faq-item[open]{border-color:var(--brand-200);}
  .faq-item[open] summary{color:var(--brand-600);}
  .faq-item[open] .plus{transform:rotate(45deg);}
  .faq-item .answer{
    padding:0 0 18px;
    font-size:15px;line-height:1.8;color:var(--ink-600);
    border-top:1px dashed var(--line);padding-top:14px;
  }

  /* ---------- CTA ---------- */
  .cta-card{
    background:#fff;
    border:1px solid var(--brand-200);
    border-radius:16px;
    padding:32px;
    display:flex;align-items:center;justify-content:space-between;gap:28px;
    box-shadow:var(--shadow-card);
  }
  .cta-card h2{font-size:clamp(22px,2.4vw,26px);margin-bottom:8px;}
  .cta-card p{margin:0;font-size:14px;color:var(--ink-600);}
  .cta-actions{display:flex;gap:12px;flex:0 0 auto;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:#F2F6FC;
    border-top:1px solid var(--line);
    margin-top:88px;
    padding:56px 0 24px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;
  }
  .footer-brand .brand{margin-bottom:12px;}
  .footer-brand p{font-size:14px;color:var(--ink-600);margin:0;max-width:340px;}
  .site-footer h4{font-size:15px;font-weight:600;margin-bottom:14px;}
  .footer-links{display:grid;gap:10px;}
  .footer-links a{font-size:14px;color:var(--ink-600);}
  .footer-links a:hover{color:var(--brand-600);}
  .footer-links .small{font-size:13px;}
  .footer-bottom{
    margin-top:36px;padding-top:18px;
    border-top:1px solid var(--line);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:var(--ink-400);
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-links,.header-actions{display:none;}
    .nav-toggle{display:grid;}
    .header-inner{height:56px;}
    .layout-2col{grid-template-columns:minmax(0,1fr);}
    .sidebar{position:static;}
    .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
    .section{padding:64px 0;}
  }
  @media (max-width:767px){
    .container-x{padding:0 20px;}
    .mobile-drawer{padding:16px 20px 20px;}
    .card-grid-2{grid-template-columns:minmax(0,1fr);}
    .faq-grid{grid-template-columns:minmax(0,1fr);}
    .cta-card{flex-direction:column;align-items:flex-start;padding:24px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1;justify-content:center;}
    .hero-facts .fact{padding:0 16px;}
    .section{padding:56px 0;}
  }
  @media (max-width:520px){
    .container-x{padding:0 16px;}
    .metric-grid{grid-template-columns:minmax(0,1fr);}
    .footer-grid{grid-template-columns:minmax(0,1fr);}
    .hero-facts{flex-direction:column;gap:14px;}
    .hero-facts .fact{padding:0;border-left:0;}
    .footer-bottom{flex-direction:column;}
  }

/* roulang page: category4 */
:root{
  --brand-600:#1D5FD6;
  --brand-500:#2E77F0;
  --brand-100:#DCE8FF;
  --brand-200:#BFD5FF;
  --brand-50:#F0F5FF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E9;
  --ink-900:#101A2B;
  --ink-600:#4A5A72;
  --ink-400:#8A97AC;
  --line:#E4EAF3;
  --bg:#F7F9FD;
  --surface:#FFFFFF;
  --ok:#16A34A;
  --warn:#D97706;
  --err:#DC2626;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(16,26,43,.04), 0 8px 24px -12px rgba(16,26,43,.10);
  --shadow-hover:0 12px 32px -12px rgba(29,95,214,.18);
  --section-y:88px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-500)}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px}
::selection{background:var(--brand-100)}

.container-x{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:var(--section-y) 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{font-size:clamp(24px,2.6vw,30px);font-weight:600;line-height:1.4;letter-spacing:0}
.section-head p{font-size:14px;color:var(--ink-400);margin-top:8px}
h1{font-size:clamp(32px,4vw,44px);line-height:1.28;font-weight:600;letter-spacing:0}
h3{font-size:clamp(18px,1.8vw,20px);font-weight:600;line-height:1.5}
.muted{color:var(--ink-600)}
.small{font-size:13px}
.dim{color:var(--ink-400)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow .18s ease}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(16,26,43,.35)}
.header-inner{height:64px;display:flex;align-items:center;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:var(--ink-900);letter-spacing:.01em;white-space:nowrap}
.brand:hover{color:var(--ink-900)}
.brand-mark{width:26px;height:26px;border-radius:8px;background:var(--brand-50);display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);flex:none}
.brand-mark svg{width:16px;height:16px}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:12px}
.nav-links a{position:relative;font-size:15px;color:var(--ink-600);padding:7px 10px;border-radius:8px;transition:background .18s ease,color .18s ease}
.nav-links a:hover{background:var(--brand-50);color:var(--brand-600)}
.nav-links a.active{color:var(--brand-600);background:var(--brand-50)}
.nav-links a.active::after{content:"";position:absolute;left:10px;right:10px;bottom:1px;height:2px;border-radius:2px;background:var(--brand-600)}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{position:relative;display:flex;align-items:center}
.search-box svg{position:absolute;left:12px;width:16px;height:16px;color:var(--ink-400);pointer-events:none}
.search-box input{width:220px;height:40px;padding:0 12px 0 34px;border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface);color:var(--ink-900);transition:border-color .18s ease,box-shadow .18s ease}
.search-box input::placeholder{color:var(--ink-400)}
.search-box input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100)}
.header-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface);align-items:center;justify-content:center;color:var(--ink-600)}
.menu-toggle:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:500;transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.btn svg{width:16px;height:16px;transition:transform .18s ease}
.btn:focus-visible{outline:2px solid var(--brand-200);outline-offset:2px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);color:#fff;box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:#F2792A;color:#fff;box-shadow:0 10px 26px -14px rgba(255,138,61,.65);transform:translateY(-1px)}
.btn-accent:hover svg{transform:translateX(3px)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:var(--surface);color:var(--ink-600);border-color:var(--line)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-600)}
.btn-sm{height:36px;padding:0 14px;font-size:14px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--ink-600);font-size:15px;background:none;border:none;padding:0}
.btn-text:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}

/* ---------- breadcrumb ---------- */
.crumbs{padding-top:22px;font-size:14px;color:var(--ink-400);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumbs a{color:var(--ink-400)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:var(--line)}
.crumbs .current{color:var(--ink-600);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- banner ---------- */
.page-banner{
  margin-top:16px;
  border-radius:16px;
  overflow:hidden;
  position:relative;
  background-color:var(--brand-50);
  background-image:linear-gradient(100deg,rgba(255,255,255,.96) 34%,rgba(240,245,255,.72) 68%,rgba(240,245,255,.35) 100%),url(/assets/images/backpic/back-2.webp);
  background-size:cover;
  background-position:center;
  border:1px solid var(--line);
}
.banner-inner{padding:52px 48px;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;color:var(--brand-600);background:var(--surface);border:1px solid var(--brand-200);border-radius:999px;padding:5px 12px;margin-bottom:18px}
.eyebrow .dot{width:6px;height:6px;border-radius:999px;background:var(--accent-500)}
.banner-inner p.lead{margin-top:16px;font-size:16px;color:var(--ink-600);max-width:640px}

/* ---------- anchor chips ---------- */
.chip-bar{display:flex;gap:10px;overflow-x:auto;padding:4px 0 10px;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.chip-bar::-webkit-scrollbar{height:6px}
.chip-bar::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
.chip{flex:none;display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink-600);font-size:14px;transition:all .18s ease}
.chip:hover{border-color:var(--brand-200);background:var(--brand-50);color:var(--brand-600)}
.chip .num{font-family:var(--mono);font-size:12px;color:var(--accent-500)}

/* ---------- KPI ---------- */
.kpi-band{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:16px;padding:32px}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.kpi{border-left:1px solid var(--brand-200);padding-left:20px}
.kpi:first-child{border-left:none;padding-left:0}
.kpi .num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(26px,3vw,34px);color:var(--brand-600);line-height:1.2;font-weight:600}
.kpi .txt{font-size:14px;color:var(--ink-600);margin-top:6px}
.kpi-track{margin-top:28px;height:6px;border-radius:999px;background:var(--surface);border:1px solid var(--brand-100);overflow:hidden}
.kpi-track span{display:block;height:100%;width:72%;background:linear-gradient(135deg,#2E77F0,#6FB0FF);opacity:.85;border-radius:999px}
.kpi-legend{margin-top:12px;display:flex;justify-content:space-between;font-size:12px;color:var(--ink-400);gap:12px;flex-wrap:wrap}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;left:23px;top:10px;bottom:34px;width:2px;background:var(--line)}
.tl-item{position:relative;padding-left:68px;padding-bottom:28px}
.tl-node{position:absolute;left:12px;top:14px;width:24px;height:24px;border-radius:999px;background:var(--surface);border:2px solid var(--accent-500);box-shadow:0 0 0 5px rgba(255,138,61,.10)}
.tl-node span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:10px;color:var(--accent-500);font-weight:600}
.step-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;display:grid;grid-template-columns:1fr 168px;gap:24px;transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.step-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--brand-200)}
.step-card .idx{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--accent-500);letter-spacing:.06em;margin-bottom:8px;display:block}
.step-card h3{margin-bottom:10px}
.step-card p{font-size:15px;line-height:1.8;color:var(--ink-600)}
.step-meta{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;font-size:13px;color:var(--ink-400)}
.step-meta b{font-weight:500;color:var(--ink-600)}
.step-thumb{border-radius:var(--radius-img);overflow:hidden;background:#EEF3FB;aspect-ratio:4/3;align-self:start}
.step-thumb img{width:100%;height:100%;object-fit:cover}
.step-tips{margin-top:14px;display:flex;flex-direction:column;gap:6px}
.step-tips li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-600)}
.step-tips li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:999px;background:var(--brand-200)}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);box-shadow:var(--shadow-card)}
table{width:100%;border-collapse:collapse;min-width:720px}
caption{caption-side:top;text-align:left;font-size:13px;color:var(--ink-400);padding:16px 20px 0}
th,td{text-align:left;padding:14px 20px;font-size:14.5px;border-bottom:1px solid var(--line);color:var(--ink-600)}
th{background:var(--brand-50);color:var(--ink-900);font-weight:500;font-size:14px;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:#FAFCFF}
td strong{color:var(--ink-900);font-weight:500}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;background:var(--brand-50);color:var(--brand-600);border:1px solid var(--brand-100)}
.tag.warn{background:var(--accent-50);color:#B0560F;border-color:#FFE0C7}
.tag.ok{background:#EAF8EF;color:#12683A;border-color:#CBEBD8}

/* ---------- card grid (related) ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mini-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:22px;display:flex;flex-direction:column;gap:10px;transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.mini-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--brand-200)}
.mini-card h3{font-size:17px}
.mini-card p{font-size:14px;color:var(--ink-600);line-height:1.75}
.mini-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-400);padding-top:8px}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item:hover{border-color:var(--brand-200)}
.faq-item[open]{border-color:var(--brand-200);box-shadow:var(--shadow-card)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:16px;font-weight:500;color:var(--ink-900)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{color:var(--brand-600)}
.faq-icon{position:relative;width:18px;height:18px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-400);border-radius:2px;transition:transform .2s ease,background .2s ease}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-icon::before{background:var(--brand-600)}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);background:var(--brand-600)}
.faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-600)}

/* ---------- CTA ---------- */
.cta-card{background:var(--surface);border:1px solid var(--brand-100);border-radius:16px;padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;box-shadow:var(--shadow-card)}
.cta-card h2{font-size:clamp(22px,2.4vw,28px);font-weight:600;line-height:1.4}
.cta-card p{margin-top:10px;font-size:14px;color:var(--ink-600)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:#F2F6FC;border-top:1px solid var(--line);margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding:56px 0 40px}
.footer-brand p{margin-top:14px;font-size:14px;color:var(--ink-600);max-width:320px;line-height:1.8}
.site-footer h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--ink-900)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a,.footer-links span{font-size:14px;color:var(--ink-600)}
.footer-links a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-400)}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:0;z-index:80;display:none}
.drawer.open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(16,26,43,.38)}
.drawer-panel{position:absolute;top:0;right:0;width:min(360px,88vw);height:100%;background:var(--surface);box-shadow:-16px 0 40px -24px rgba(16,26,43,.4);display:flex;flex-direction:column;padding:18px 20px 24px;overflow-y:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:inline-flex;align-items:center;justify-content:center;color:var(--ink-600)}
.drawer-close:hover{background:var(--brand-50);color:var(--brand-600)}
.drawer .search-box input{width:100%}
.drawer-nav{display:flex;flex-direction:column;margin:18px 0 auto}
.drawer-nav a{height:44px;display:flex;align-items:center;font-size:15px;color:var(--ink-600);border-bottom:1px solid var(--line)}
.drawer-nav a.active{color:var(--brand-600);font-weight:500}
.drawer-foot{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.drawer-foot .btn{width:100%}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links,.header-tools .search-box,.header-tools .btn-ghost{display:none}
  .menu-toggle{display:inline-flex}
  .header-tools .btn-accent span{display:none}
  .header-tools .btn-accent{padding:0 14px}
  .step-card{grid-template-columns:1fr}
  .step-thumb{max-width:280px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--section-y:56px}
  .container-x{padding:0 16px}
  .banner-inner{padding:34px 22px}
  .grid-3,.faq-grid,.kpi-grid{grid-template-columns:1fr}
  .kpi{border-left:none;padding-left:0;border-top:1px solid var(--brand-200);padding-top:14px}
  .kpi:first-child{border-top:none;padding-top:0}
  .cta-card{flex-direction:column;align-items:flex-start;padding:26px 22px}
  .timeline::before{left:9px;width:1px}
  .tl-item{padding-left:34px}
  .tl-node{left:0;top:12px;width:19px;height:19px;box-shadow:0 0 0 4px rgba(255,138,61,.10)}
  .tl-node span{font-size:9px}
  .step-card{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .header-inner{height:56px;gap:12px}
  .brand{font-size:15px}
  .btn{height:40px;padding:0 16px;font-size:14px}
  .chip{height:34px;padding:0 13px;font-size:13px}
  h1{font-size:30px}
}