/* roulang page: index */
:root{
  --ink-900:#0B1020; --ink-800:#121A2E; --ink-700:#1C2740;
  --paper-0:#FFFFFF; --paper-1:#F4F5F7; --paper-2:#EDEFF2;
  --accent:#3FA79B; --accent-soft:#E6F4F2;
  --star:#C7A96B;
  --text-1:#161B26; --text-2:#59637A; --text-3:#8A93A6;
  --line:#E3E6EC; --line-dark:rgba(255,255,255,.10);
  --r-card:16px; --r-btn:11px; --r-input:10px; --r-img:12px;
  --sh-1:0 1px 2px rgba(11,16,32,.06), 0 8px 24px -12px rgba(11,16,32,.10);
  --sh-2:0 16px 40px -16px rgba(11,16,32,.18);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper-0);color:var(--text-1);
  font-family:var(--font-sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;color:var(--text-1);margin:0;line-height:1.3;letter-spacing:-0.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1220px;margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section-sm{padding:72px 0}
.bg-paper1{background:var(--paper-1)}
.bg-paper2{background:var(--paper-2)}
.bg-ink{background:var(--ink-800);color:#fff}
.bg-ink h2,.bg-ink h3,.bg-ink h4{color:#fff}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--accent);
  text-transform:uppercase;font-weight:500;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--star)}
.sec-head{max-width:660px;margin-bottom:56px}
.sec-head h2{font-size:clamp(24px,3vw,38px);margin-top:14px}
.sec-head p{margin-top:16px;color:var(--text-2);font-size:16px;max-width:600px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(18,26,46,.86);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background .3s ease, border-color .3s ease, padding .3s ease;
}
.site-header.scrolled{background:rgba(11,16,32,.95);border-bottom-color:var(--line-dark)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;transition:height .3s ease}
.site-header.scrolled .nav-inner{height:64px}
.brand{display:flex;align-items:center;gap:11px;color:#fff}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:linear-gradient(150deg,var(--ink-700),var(--ink-900));
  border:1px solid rgba(255,255,255,.14);
  display:grid;place-items:center;
}
.brand-mark svg{width:19px;height:19px}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:600;letter-spacing:-0.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;
  color:rgba(255,255,255,.72);transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-link.active{color:#fff}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--accent);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-login{
  font-size:14.5px;color:rgba(255,255,255,.72);
  padding-bottom:2px;border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.nav-login:hover{color:var(--accent);border-bottom-color:var(--accent)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;position:relative;overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,background .25s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--ink-800);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--ink-700);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary::after{
  content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.16) 50%,transparent 80%);
  transform:translateX(-120%);transition:transform .6s ease;
}
.btn-primary:hover::after{transform:translateX(120%)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.06)}
.btn-ghost-dark{background:transparent;border-color:rgba(255,255,255,.22);color:#fff}
.btn-ghost-dark:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.08)}
.btn-sm{padding:9px 17px;font-size:14px}
.btn-block{width:100%}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;color:var(--text-1);
  position:relative;padding-bottom:3px;font-weight:500;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);
  transition:width .18s ease;
}
.text-link:hover{color:var(--accent)}
.text-link:hover::after{width:100%}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--ink-900);color:#fff;
  padding:152px 0 104px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 90% at 78% 12%,rgba(63,167,155,.16),transparent 58%),
             radial-gradient(90% 70% at 8% 92%,rgba(199,169,107,.10),transparent 62%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(28px,4.2vw,52px);line-height:1.22;color:#fff;margin-top:20px}
.hero-sub{margin-top:22px;font-size:17px;color:rgba(255,255,255,.76);max-width:520px;line-height:1.85}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-cta .btn-primary{background:var(--accent);color:#08201D}
.hero-cta .btn-primary:hover{background:#48b6a9;color:#08201D}
.trust-row{
  display:flex;flex-wrap:wrap;gap:14px 30px;margin-top:38px;
  padding-top:24px;border-top:1px solid var(--line-dark);
}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:rgba(255,255,255,.70)}
.trust-item i{width:5px;height:5px;border-radius:50%;background:var(--star);flex:0 0 5px}
.hero-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  min-height:404px;border:1px solid var(--line-dark);
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,16,32,.68),rgba(11,16,32,.50) 45%,rgba(11,16,32,.82));
}
.hero-visual-inner{position:relative;z-index:2;padding:34px;height:100%;display:flex;flex-direction:column;justify-content:flex-end;gap:18px;min-height:404px}
.hero-panel{
  background:rgba(11,16,32,.62);border:1px solid var(--line-dark);
  border-radius:14px;padding:18px 20px;
}
.hero-panel .k{font-size:13px;color:rgba(255,255,255,.62)}
.hero-panel .v{font-family:var(--font-serif);font-size:20px;color:#fff;margin-top:6px}
.hero-panel-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stars{position:absolute;inset:0;z-index:1;pointer-events:none}
.star-dot{position:absolute;width:2px;height:2px;border-radius:50%;background:#fff;opacity:.5;animation:twinkle 5s ease-in-out infinite}
@keyframes twinkle{0%,100%{opacity:.35}50%{opacity:.8}}

/* ---------- services ---------- */
.svc-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.svc-aside h2{font-size:clamp(24px,3vw,36px);margin-top:14px}
.svc-aside p{margin-top:18px;color:var(--text-2)}
.svc-aside .text-link{margin-top:26px}
.svc-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.svc-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 28px;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.svc-card:nth-child(2){margin-top:34px}
.svc-card:nth-child(4){margin-top:34px}
.svc-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(63,167,155,.4)}
.svc-icon{width:42px;height:42px;border-radius:11px;background:var(--accent-soft);display:grid;place-items:center;color:var(--accent)}
.svc-card h3{font-size:21px;margin-top:20px}
.svc-card p{margin-top:12px;color:var(--text-2);font-size:15px;line-height:1.8}
.svc-card .text-link{margin-top:20px;font-size:14px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;position:relative}
.stat{padding-top:26px;border-top:1px solid var(--line-dark)}
.stat .num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:clamp(34px,4.4vw,54px);line-height:1;color:#fff;font-weight:600;letter-spacing:-0.02em;
}
.stat .num span{color:var(--accent)}
.stat .lbl{margin-top:14px;font-size:14.5px;color:rgba(255,255,255,.66)}

/* ---------- cases ---------- */
.case-scroll{
  display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 56px)/3);
  gap:28px;overflow-x:auto;padding:6px 2px 26px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.case-scroll::-webkit-scrollbar{height:6px}
.case-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.case-card{
  scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(63,167,155,.4)}
.case-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.case-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-cover img{transform:scale(1.04)}
.case-body{padding:24px}
.case-card h3{font-size:19px;margin-top:14px}
.case-card p{margin-top:10px;color:var(--text-2);font-size:14.5px;line-height:1.78}
.badge{
  display:inline-block;font-size:12.5px;font-weight:500;padding:3px 9px;border-radius:5px;
  border:1px solid rgba(63,167,155,.35);background:rgba(63,167,155,.08);color:#2C7C73;
}
.badge-star{border-color:rgba(199,169,107,.45);background:rgba(199,169,107,.10);color:#8A7136}

/* ---------- timeline ---------- */
.tl{position:relative;display:grid;gap:0;margin-top:8px}
.tl-item{
  display:grid;grid-template-columns:96px 1fr;gap:28px;padding:30px 0;
  border-bottom:1px solid var(--line);transition:background .25s ease;
}
.tl-item:first-child{border-top:1px solid var(--line)}
.tl-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:30px;font-weight:600;color:var(--text-3);line-height:1;letter-spacing:-.02em;
}
.tl-item:hover .tl-num{color:var(--accent)}
.tl-body h3{font-size:21px}
.tl-body p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:720px}
.tl-tag{margin-top:14px;display:inline-block}

/* ---------- news / cms ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1);min-height:230px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(63,167,155,.4)}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-3)}
.news-card h3{
  font-size:19px;margin-top:16px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  margin-top:12px;color:var(--text-2);font-size:14.5px;line-height:1.78;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .text-link{margin-top:20px;font-size:14px}
.empty-state{
  grid-column:1/-1;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:56px 28px;text-align:center;background:var(--paper-1);
}
.empty-state p{color:var(--text-2);font-size:15px}
.empty-state .btn{margin-top:22px}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-family:var(--font-serif);font-size:18px;font-weight:600;color:var(--text-1);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:1px;
  transition:transform .24s ease;
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{top:0;left:7px;width:2px;height:16px}
.faq-item.open .faq-icon::after{transform:rotate(45deg)}
.faq-item.open .faq-icon::before{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 60px 26px 0;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:38px;box-shadow:var(--sh-1);
}
.field{margin-top:20px}
.field:first-of-type{margin-top:0}
.field label{display:block;font-size:14px;color:var(--text-2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-input);
  background:var(--paper-0);transition:border-color .2s ease,box-shadow .2s ease;
}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,167,155,.18);
}
.field textarea{min-height:118px;resize:vertical}
.form-note{margin-top:16px;font-size:13px;color:var(--text-3)}
.form-msg{margin-top:16px;font-size:14px;color:#2C7C73;display:none}
.info-list{display:grid;gap:22px}
.info-item{display:flex;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.info-item:last-child{border-bottom:0;padding-bottom:0}
.info-icon{width:38px;height:38px;flex:0 0 38px;border-radius:10px;background:var(--accent-soft);display:grid;place-items:center;color:var(--accent)}
.info-item .k{font-size:13.5px;color:var(--text-3)}
.info-item .v{font-size:15.5px;color:var(--text-1);margin-top:4px;font-weight:500}
.map-box{
  margin-top:28px;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/10;
  position:relative;border:1px solid var(--line);
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
}
.map-box::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,16,32,.35),rgba(11,16,32,.62))}
.map-box .map-tag{
  position:absolute;left:18px;bottom:16px;z-index:2;color:#fff;font-size:14px;
  background:rgba(11,16,32,.6);border:1px solid var(--line-dark);padding:7px 13px;border-radius:8px;
}

/* ---------- cta strip ---------- */
.cta-strip{
  background:var(--ink-800);border-radius:20px;padding:56px 52px;color:#fff;
  display:grid;grid-template-columns:1.4fr .6fr;gap:36px;align-items:center;
  border:1px solid var(--line-dark);
}
.cta-strip h2{font-size:clamp(23px,2.8vw,32px);color:#fff}
.cta-strip p{margin-top:14px;color:rgba(255,255,255,.70);font-size:15.5px;max-width:620px}
.cta-strip .btn-wrap{display:flex;flex-direction:column;gap:12px;align-items:flex-start}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-800);color:rgba(255,255,255,.68);padding:78px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{margin-top:20px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.58);max-width:320px}
.footer-col h4{font-size:15px;color:#fff;font-family:var(--font-sans);font-weight:600;letter-spacing:.02em}
.footer-col ul{margin-top:20px;display:grid;gap:12px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.62);transition:color .2s ease}
.footer-col a:hover{color:var(--accent)}
.footer-col li span{font-size:14.5px;color:rgba(255,255,255,.62)}
.footer-bottom{
  margin-top:64px;border-top:1px solid var(--line-dark);padding:26px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.46);
}

/* ---------- mobile tab bar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:rgba(11,16,32,.97);border-top:1px solid var(--line-dark);
  padding-bottom:env(safe-area-inset-bottom);
  backdrop-filter:saturate(140%) blur(8px);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr);height:60px}
.tab-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:11px;color:var(--text-3)}
.tab-item svg{width:20px;height:20px}
.tab-item.active{color:var(--accent)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-links{gap:0}
  .nav-link{padding:9px 10px;font-size:14px}
}
@media (max-width:1024px){
  .nav-links,.nav-login{display:none}
  .hero{padding:128px 0 84px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-visual,.hero-visual-inner{min-height:320px}
  .svc-grid{grid-template-columns:1fr;gap:40px}
  .faq-layout{grid-template-columns:1fr;gap:36px}
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .case-scroll{grid-auto-columns:60%}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:38px}
  .cta-strip{grid-template-columns:1fr;padding:44px 34px}
}
@media (max-width:768px){
  .section{padding:70px 0}
  .section-sm{padding:54px 0}
  .container{padding:0 18px}
  .nav-inner{height:64px}
  .site-header.scrolled .nav-inner{height:58px}
  .brand-text{font-size:15.5px}
  body{padding-bottom:70px}
  .tabbar{display:block}
  .stats{grid-template-columns:1fr 1fr;gap:28px}
  .svc-cards{grid-template-columns:1fr}
  .svc-card:nth-child(2),.svc-card:nth-child(4){margin-top:0}
  .case-scroll{grid-auto-columns:82%}
  .news-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:64px 1fr;gap:18px}
  .tl-num{font-size:22px}
  .form-card{padding:26px 22px}
  .faq-a p{padding-right:20px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .footer-brand p{max-width:none}
  .cta-strip{padding:36px 24px;border-radius:16px}
  .cta-strip .btn-wrap{align-items:stretch}
  .cta-strip .btn{width:100%}
}
@media (max-width:520px){
  .hero{padding:112px 0 68px}
  .stats{grid-template-columns:1fr}
  .hero-visual,.hero-visual-inner{min-height:270px}
  .hero-panel-row{grid-template-columns:1fr}
}
@media (min-width:1440px){
  .container{max-width:1270px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .star-dot{opacity:.5}
}

/* roulang page: article */
:root{
  --ink-900:#0B1020;
  --ink-800:#121A2E;
  --ink-700:#1C2740;
  --paper-0:#FFFFFF;
  --paper-1:#F4F5F7;
  --paper-2:#EDEFF2;
  --accent:#3FA79B;
  --accent-soft:#E6F4F2;
  --star:#C7A96B;
  --text-1:#161B26;
  --text-2:#59637A;
  --text-3:#8A93A6;
  --line:#E3E6EC;
  --line-dark:rgba(255,255,255,.10);
  --radius-card:15px;
  --radius-btn:11px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(11,16,32,.06),0 8px 24px -12px rgba(11,16,32,.10);
  --shadow-2:0 16px 40px -16px rgba(11,16,32,.18);
  --font-serif:"Source Han Serif SC","Noto Serif SC",Georgia,"Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.page-body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--text-1);
  background:var(--paper-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.page-body img{max-width:100%;height:auto;display:block}
body.page-body a{color:inherit;text-decoration:none}
body.page-body button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1220px;margin:0 auto;padding:0 28px}

/* ===== 顶部导航 ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:76px;
  background:rgba(18,26,46,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:height .3s ease,background .3s ease,border-color .3s ease;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(11,16,32,.96);
  border-bottom-color:var(--line-dark);
}
.nav-inner{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:30px;height:30px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(63,167,155,.35);
  border-radius:9px;
  background:rgba(63,167,155,.10);
}
.brand-mark svg{width:19px;height:19px}
.brand-text{
  font-family:var(--font-serif);
  font-size:16.5px;
  font-weight:600;
  letter-spacing:-.01em;
  color:#fff;
  white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  font-size:15px;
  color:rgba(255,255,255,.70);
  border-radius:9px;
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:4px;height:1.5px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:#fff}
.nav-actions{display:flex;align-items:center;gap:14px;flex:none}
.nav-login{
  font-size:14.5px;
  color:rgba(255,255,255,.72);
  border-bottom:1px solid rgba(255,255,255,.22);
  padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.nav-login:hover{color:var(--accent);border-color:var(--accent)}

/* ===== 按钮 ===== */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:500;
  line-height:1.2;
  border:1px solid transparent;
  overflow:hidden;
  transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{background:var(--ink-800);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:#1A2440;transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:var(--accent-soft);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.06)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost-light:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.10)}
.site-header .btn-primary{background:#fff;color:var(--ink-900);box-shadow:none}
.site-header .btn-primary:hover{background:var(--accent);color:#fff}

/* ===== 徽章 ===== */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:5px;
  font-size:12.5px;
  font-weight:500;
  color:var(--accent);
  background:rgba(63,167,155,.09);
  border:1px solid rgba(63,167,155,.24);
  white-space:nowrap;
}
.badge-star{
  color:#8A6F35;
  background:rgba(199,169,107,.10);
  border-color:rgba(199,169,107,.38);
}
.badge-light{
  color:rgba(255,255,255,.86);
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.22);
}

/* ===== 文章页首屏 ===== */
main{padding-top:76px}
.page-hero{
  position:relative;
  padding:48px 0 56px;
  background:var(--ink-900);
  overflow:hidden;
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  opacity:.40;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,16,32,.70) 0%,rgba(11,16,32,.90) 65%,rgba(11,16,32,.97) 100%);
}
.starfield{
  position:absolute;inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 8% 24%,rgba(255,255,255,.75),transparent 60%),
    radial-gradient(1.4px 1.4px at 18% 68%,rgba(255,255,255,.55),transparent 60%),
    radial-gradient(1.8px 1.8px at 27% 36%,rgba(199,169,107,.65),transparent 60%),
    radial-gradient(1.4px 1.4px at 36% 82%,rgba(255,255,255,.50),transparent 60%),
    radial-gradient(1.6px 1.6px at 46% 18%,rgba(255,255,255,.60),transparent 60%),
    radial-gradient(1.4px 1.4px at 55% 58%,rgba(255,255,255,.45),transparent 60%),
    radial-gradient(1.8px 1.8px at 64% 30%,rgba(255,255,255,.62),transparent 60%),
    radial-gradient(1.4px 1.4px at 73% 76%,rgba(199,169,107,.55),transparent 60%),
    radial-gradient(1.6px 1.6px at 82% 42%,rgba(255,255,255,.58),transparent 60%),
    radial-gradient(1.4px 1.4px at 90% 66%,rgba(255,255,255,.46),transparent 60%),
    radial-gradient(1.6px 1.6px at 95% 22%,rgba(255,255,255,.52),transparent 60%),
    radial-gradient(1.4px 1.4px at 12% 90%,rgba(255,255,255,.42),transparent 60%);
  animation:twinkle 5.4s ease-in-out infinite alternate;
}
@keyframes twinkle{from{opacity:.42}to{opacity:.82}}
.page-hero-inner{position:relative;z-index:2}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;
  color:rgba(255,255,255,.52);
  margin-bottom:26px;
}
.breadcrumb a{color:rgba(255,255,255,.62);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(255,255,255,.28)}
.breadcrumb .current{
  color:rgba(255,255,255,.82);
  max-width:56ch;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

.article-head h1{
  font-family:var(--font-serif);
  font-size:clamp(26px,3.3vw,40px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.32;
  color:#fff;
  max-width:22ch;
  margin-bottom:22px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding-top:20px;
  border-top:1px solid var(--line-dark);
  font-size:14px;
  color:rgba(255,255,255,.58);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.30)}
.article-meta time{font-family:var(--font-mono);letter-spacing:.02em;color:rgba(255,255,255,.75)}

/* ===== 文章布局 ===== */
.article-section{padding:72px 0 96px;background:var(--paper-0)}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 316px;
  gap:60px;
  align-items:start;
}
.article-main{min-width:0}

/* 正文排版 */
.article-body{
  max-width:760px;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text-1);
  word-break:break-word;
}
.article-body > * + *{margin-top:1.2em}
.article-body p{margin:0}
.article-body h2{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.2vw,27px);
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--text-1);
  margin:2.4em 0 .8em;
  padding-left:14px;
  border-left:3px solid var(--accent);
  scroll-margin-top:96px;
}
.article-body h3{
  font-family:var(--font-serif);
  font-size:20px;
  font-weight:600;
  color:var(--text-1);
  margin:2em 0 .6em;
  scroll-margin-top:96px;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  margin:1.6em 0 .5em;
  color:var(--ink-800);
}
.article-body strong{font-weight:600;color:var(--ink-900)}
.article-body a{
  color:var(--accent);
  border-bottom:1px solid rgba(63,167,155,.42);
  transition:border-color .2s ease,color .2s ease;
}
.article-body a:hover{border-color:var(--accent)}
.article-body ul,.article-body ol{margin:1.2em 0;padding-left:4px}
.article-body ul li,.article-body ol li{
  position:relative;
  padding-left:24px;
  margin:.55em 0;
  color:var(--text-1);
}
.article-body ul li::before{
  content:"";
  position:absolute;left:4px;top:.82em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--accent);
  transform:rotate(45deg);
}
.article-body ol{counter-reset:art-ol}
.article-body ol li{counter-increment:art-ol}
.article-body ol li::before{
  content:counter(art-ol,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--star);
  letter-spacing:.02em;
}
.article-body ol li{padding-left:34px}
.article-body blockquote{
  margin:1.8em 0;
  padding:6px 0 6px 20px;
  border-left:2px solid var(--accent);
  color:var(--text-2);
  font-size:16px;
}
.article-body blockquote p + p{margin-top:.8em}
.article-body img{
  border-radius:var(--radius-img);
  margin:1.8em auto;
  box-shadow:var(--shadow-1);
}
.article-body figure{margin:1.8em 0}
.article-body figcaption{
  margin-top:12px;
  text-align:center;
  font-size:13px;
  color:var(--text-3);
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.8em 0;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
}
.article-body thead th{
  background:var(--paper-1);
  font-weight:600;
  text-align:left;
}
.article-body th,.article-body td{
  padding:12px 16px;
  border:1px solid var(--line);
  color:var(--text-1);
}
.article-body tbody tr:nth-child(even){background:#FAFBFC}
.article-body code{
  font-family:var(--font-mono);
  font-size:14px;
  background:var(--paper-1);
  border:1px solid var(--line);
  border-radius:5px;
  padding:1px 6px;
  color:var(--ink-800);
}
.article-body pre{
  background:var(--ink-800);
  color:#E8ECF4;
  padding:18px 20px;
  border-radius:var(--radius-img);
  overflow-x:auto;
  font-size:14px;
  line-height:1.7;
}
.article-body pre code{background:none;border:none;color:inherit;padding:0}
.article-body hr{
  border:none;
  height:1px;
  background:var(--line);
  margin:2.4em 0;
}

/* 空态 */
.empty-state{
  max-width:760px;
  padding:56px 40px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-1);
  box-shadow:var(--shadow-1);
  text-align:center;
}
.empty-state .empty-mark{
  width:46px;height:46px;
  margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(63,167,155,.35);
  border-radius:12px;
  background:var(--accent-soft);
}
.empty-state .empty-mark svg{width:24px;height:24px}
.empty-state h2{
  font-family:var(--font-serif);
  font-size:21px;
  color:var(--text-1);
  margin-bottom:10px;
}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:24px}

/* ===== 侧栏 ===== */
.article-aside{
  display:flex;
  flex-direction:column;
  gap:20px;
  position:sticky;
  top:96px;
}
.aside-card{
  padding:24px 22px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-0);
  box-shadow:var(--shadow-1);
}
.aside-title{
  display:flex;align-items:center;gap:9px;
  font-family:var(--font-serif);
  font-size:15.5px;
  color:var(--text-1);
  padding-bottom:14px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.aside-title::before{
  content:"";
  width:14px;height:1.5px;
  background:var(--star);
  flex:none;
}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow-y:auto}
.toc-list li a{
  display:block;
  padding:7px 0 7px 14px;
  font-size:14px;
  line-height:1.55;
  color:var(--text-2);
  border-left:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease;
}
.toc-list li a:hover{color:var(--accent);border-left-color:var(--accent)}
.toc-list li.toc-lv3 a{padding-left:28px;font-size:13.5px;color:var(--text-3)}
.toc-list li a.is-active{color:var(--accent);border-left-color:var(--accent)}
.aside-links{display:flex;flex-direction:column;gap:12px}
.aside-links li a{
  display:block;
  font-size:14.5px;
  line-height:1.6;
  color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
}
.aside-links li a:hover{color:var(--accent);transform:translateX(3px)}
.aside-links li span{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px}
.aside-note{
  font-size:13.5px;
  color:var(--text-2);
  line-height:1.75;
}
.aside-note strong{color:var(--text-1)}

/* ===== 相关推荐 ===== */
.article-tail{
  max-width:760px;
  margin-top:64px;
  padding-top:44px;
  border-top:1px solid var(--line);
}
.section-title-sm{
  font-family:var(--font-serif);
  font-size:21px;
  color:var(--text-1);
  margin-bottom:24px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.rel-card{
  display:flex;
  flex-direction:column;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-0);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.rel-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-2);
  border-color:rgba(63,167,155,.45);
}
.rel-card-lg{grid-column:1 / -1}
.rel-card img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.rel-body{padding:22px 24px 24px}
.rel-body h3{
  font-family:var(--font-serif);
  font-size:17.5px;
  line-height:1.5;
  color:var(--text-1);
  margin:12px 0 8px;
}
.rel-body p{
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rel-time{
  display:inline-block;
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--text-3);
  letter-spacing:.02em;
}
.rel-card-sm .rel-body{padding:18px 20px 22px}
.rel-card-sm .rel-body h3{font-size:16px;margin-top:0}

.article-navline{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:40px;
  padding:20px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-1);
  font-size:14.5px;
  color:var(--text-2);
}
.article-navline a{
  color:var(--text-1);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.article-navline a:hover{color:var(--accent);border-color:var(--accent)}

/* ===== CTA 区 ===== */
.cta-band{
  position:relative;
  padding:72px 0;
  background:var(--ink-800);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    radial-gradient(1.6px 1.6px at 14% 30%,rgba(255,255,255,.55),transparent 60%),
    radial-gradient(1.4px 1.4px at 38% 72%,rgba(255,255,255,.42),transparent 60%),
    radial-gradient(1.8px 1.8px at 62% 26%,rgba(199,169,107,.55),transparent 60%),
    radial-gradient(1.4px 1.4px at 84% 64%,rgba(255,255,255,.45),transparent 60%);
  animation:twinkle 6s ease-in-out infinite alternate;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-inner h2{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.6vw,30px);
  color:#fff;
  margin-bottom:12px;
}
.cta-inner p{
  max-width:56ch;
  font-size:15.5px;
  color:rgba(255,255,255,.66);
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink-800);
  border-top:1px solid var(--line-dark);
  padding:72px 0 30px;
  color:rgba(255,255,255,.62);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid var(--line-dark);
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.55);
  max-width:38ch;
}
.footer-col h4{
  font-family:var(--font-serif);
  font-size:15px;
  color:#fff;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li a,.footer-col li span{
  font-size:14px;
  color:rgba(255,255,255,.58);
  line-height:1.7;
  transition:color .2s ease;
}
.footer-col li a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.42);
}
.footer-bottom span:last-child{font-family:var(--font-mono);letter-spacing:.03em}

/* ===== 移动端底部 Tab ===== */
.mobile-tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:90;
  height:calc(60px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(11,16,32,.97);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-top:1px solid var(--line-dark);
}
.tab-item{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11.5px;
  color:var(--text-3);
  transition:color .2s ease;
}
.tab-item svg{width:20px;height:20px;stroke-width:1.5}
.tab-item.is-active{color:var(--accent)}

/* ===== 滚动入场 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1280px){
  .article-layout{gap:44px;grid-template-columns:minmax(0,1fr) 290px}
}
@media (max-width:1024px){
  .nav-links{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-aside{position:static;margin-top:52px}
  .article-body{max-width:100%}
  .article-tail{max-width:100%}
  .mobile-tabbar{display:flex}
  .page-body{padding-bottom:calc(60px + env(safe-area-inset-bottom))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:768px){
  main{padding-top:66px}
  .site-header{height:66px}
  .site-header.is-scrolled{height:60px}
  .container{padding:0 18px}
  .nav-login{display:none}
  .brand-text{font-size:15px}
  .page-hero{padding:34px 0 42px}
  .article-section{padding:48px 0 64px}
  .article-head h1{max-width:100%}
  .breadcrumb .current{max-width:100%;white-space:normal}
  .cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .related-grid{grid-template-columns:1fr}
  .article-body{font-size:16px}
  .article-navline{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#0B1020;
  --ink-800:#121A2E;
  --ink-700:#1C2740;
  --paper-0:#FFFFFF;
  --paper-1:#F4F5F7;
  --paper-2:#EDEFF2;
  --accent:#3FA79B;
  --accent-soft:#E6F4F2;
  --star:#C7A96B;
  --text-1:#161B26;
  --text-2:#59637A;
  --text-3:#8A93A6;
  --line:#E3E6EC;
  --radius-card:16px;
  --radius-btn:11px;
  --radius-input:10px;
  --radius-img:14px;
  --shadow-1:0 1px 2px rgba(11,16,32,.06),0 8px 24px -12px rgba(11,16,32,.10);
  --shadow-2:0 16px 40px -16px rgba(11,16,32,.18);
  --container:1240px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text-1);
  background:var(--paper-0);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
button{font:inherit;cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{
  font-family:"Noto Serif SC","Source Han Serif SC",serif;
  font-weight:600;
  line-height:1.32;
  letter-spacing:-.01em;
  margin:0;
  color:var(--text-1);
}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(11,16,32,.82);
  border-bottom:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background-color .3s ease,box-shadow .3s ease;
}
.site-header.shrink{background:rgba(11,16,32,.96);box-shadow:0 6px 24px -16px rgba(0,0,0,.6)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:78px;transition:height .3s ease}
.site-header.shrink .nav-inner{height:64px}

.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-mark svg{width:100%;height:100%}
.brand-text{font-family:"Noto Serif SC",serif;font-size:16px;font-weight:600;color:#fff;letter-spacing:.01em;white-space:nowrap}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  padding:9px 14px;
  font-size:15px;
  color:rgba(255,255,255,.72);
  border-radius:8px;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-link.active{color:var(--accent);background:rgba(63,167,155,.12)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}

.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.nav-login{
  font-size:14px;color:rgba(255,255,255,.78);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.nav-login:hover{color:var(--accent);border-bottom-color:var(--accent)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;font-size:15px;font-weight:500;line-height:1.2;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  position:relative;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease,color .25s ease,border-color .25s ease;
}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-primary{background:var(--ink-800);color:#fff;border-color:var(--ink-800)}
.btn-primary:hover{background:#1B2540;border-color:#1B2540;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.22),transparent);
  transform:skewX(-18deg);transition:left .55s ease;
}
.btn-primary:hover::after{left:130%}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line)}
.btn-ghost:hover{color:var(--accent);border-color:var(--accent);background:rgba(63,167,155,.06)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--accent);
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  padding-bottom:3px;transition:background-size .18s ease;
}
.btn-link:hover{background-size:100% 1px}

.site-header .btn-primary{background:#fff;color:var(--ink-900);border-color:#fff}
.site-header .btn-primary:hover{background:#F0F3F8;border-color:#F0F3F8}
.site-header .btn-primary::after{display:none}

/* ---------- sections ---------- */
.section{padding:104px 0}
.section-alt{background:var(--paper-1)}
.section-dark{background:var(--ink-900);color:rgba(255,255,255,.78)}
.section-dark h2,.section-dark h3{color:#fff}

.sec-head{max-width:760px;margin-bottom:52px}
.sec-label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;
}
.sec-label::before{content:"";width:26px;height:1px;background:var(--star)}
.sec-title{font-size:clamp(26px,3.1vw,38px);margin-top:16px}
.sec-desc{margin-top:18px;font-size:16.5px;color:var(--text-2);line-height:1.85}
.section-dark .sec-desc{color:rgba(255,255,255,.66)}

/* ---------- category hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);
  padding:168px 0 104px;
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.48;
}
.cat-hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,16,32,.95) 0%,rgba(11,16,32,.84) 46%,rgba(11,16,32,.58) 100%);
}
.cat-hero-stars{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 24%,rgba(255,255,255,.75),transparent 60%),
    radial-gradient(1.4px 1.4px at 26% 62%,rgba(255,255,255,.55),transparent 60%),
    radial-gradient(1.8px 1.8px at 44% 18%,rgba(255,255,255,.7),transparent 60%),
    radial-gradient(1.3px 1.3px at 58% 74%,rgba(255,255,255,.5),transparent 60%),
    radial-gradient(1.6px 1.6px at 72% 34%,rgba(255,255,255,.65),transparent 60%),
    radial-gradient(1.4px 1.4px at 86% 58%,rgba(255,255,255,.55),transparent 60%),
    radial-gradient(1.2px 1.2px at 92% 16%,rgba(199,169,107,.8),transparent 60%),
    radial-gradient(1.2px 1.2px at 34% 86%,rgba(199,169,107,.7),transparent 60%);
  animation:twinkle 5.2s ease-in-out infinite alternate;
}
@keyframes twinkle{from{opacity:.42}to{opacity:.82}}

.cat-hero-inner{position:relative;z-index:2;max-width:820px}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13.5px;color:rgba(255,255,255,.55);margin-bottom:26px;
}
.crumb a:hover{color:var(--accent)}
.crumb span.sep{color:rgba(255,255,255,.3)}
.crumb .current{color:rgba(255,255,255,.85)}
.cat-hero h1{
  color:#fff;
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.28;
  letter-spacing:-.015em;
}
.cat-hero-lead{
  margin-top:22px;font-size:17.5px;color:rgba(255,255,255,.74);max-width:640px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-tag{
  font-size:13.5px;color:rgba(255,255,255,.78);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);
  border-radius:6px;padding:7px 14px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.cat-hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.cat-hero .btn-ghost:hover{color:var(--accent);border-color:var(--accent);background:rgba(63,167,155,.12)}
.cat-hero .btn-primary{background:#fff;color:var(--ink-900);border-color:#fff}
.cat-hero .btn-primary:hover{background:#EDF1F7;border-color:#EDF1F7;transform:translateY(-1px)}
.cat-hero .btn-primary::after{display:none}

/* ---------- intro ---------- */
.intro-wrap{max-width:860px}
.intro-wrap p{font-size:17px;color:var(--text-2);line-height:1.9}
.intro-wrap p + p{margin-top:22px}
.intro-wrap strong{color:var(--text-1);font-weight:600}

/* ---------- zigzag ---------- */
.zz-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:60px;align-items:center}
.zz-row + .zz-row{margin-top:96px}
.zz-row.reverse .zz-media{order:2}
.zz-row.reverse .zz-text{order:1}
.zz-media{
  position:relative;border-radius:var(--radius-img);overflow:hidden;
  box-shadow:var(--shadow-1);background:var(--paper-2);
  aspect-ratio:16/10;
}
.zz-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.zz-media:hover img{transform:scale(1.03)}
.zz-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,16,32,0) 55%,rgba(11,16,32,.35) 100%);
}
.zz-index{
  font-family:"SFMono-Regular",Consolas,monospace;
  font-size:40px;line-height:1;font-weight:600;color:var(--paper-2);
  letter-spacing:.02em;
}
.zz-text h3{font-size:clamp(21px,2.2vw,25px);margin-top:10px}
.zz-text > p{margin-top:18px;font-size:16.5px;color:var(--text-2);line-height:1.88}
.check-list{margin-top:24px;display:grid;gap:12px}
.check-list li{
  position:relative;padding-left:28px;font-size:15.5px;color:var(--text-1);line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(-45deg);border-radius:1px;
}

/* ---------- key points ---------- */
.kp-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.kp-card{
  background:var(--paper-0);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:30px 26px;
  box-shadow:var(--shadow-1);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.kp-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(63,167,155,.5)}
.kp-num{
  font-family:"SFMono-Regular",Consolas,monospace;
  font-size:13px;font-weight:600;color:var(--star);letter-spacing:.14em;
}
.kp-card h3{font-size:17.5px;margin-top:16px}
.kp-card p{margin-top:12px;font-size:15px;color:var(--text-2);line-height:1.78}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px;align-items:start}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:24px 4px;font-size:17px;font-weight:500;color:var(--text-1);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;margin-top:3px;position:relative;
  transition:transform .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:1.6px}
.faq-icon::after{left:10px;top:0;width:1.6px;height:22px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 44px 26px 4px;font-size:15.5px;color:var(--text-2);line-height:1.85}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  background:var(--ink-800);
  border-radius:20px;
  padding:66px 60px;
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:40px;align-items:center;
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(1.6px 1.6px at 78% 22%,rgba(255,255,255,.6),transparent 60%),
    radial-gradient(1.4px 1.4px at 88% 62%,rgba(255,255,255,.45),transparent 60%),
    radial-gradient(1.4px 1.4px at 66% 76%,rgba(199,169,107,.65),transparent 60%);
  opacity:.7;
}
.cta-panel h2{position:relative;color:#fff;font-size:clamp(24px,2.6vw,32px)}
.cta-panel p{position:relative;margin-top:16px;color:rgba(255,255,255,.7);font-size:16px;max-width:520px}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-panel .btn-primary{background:#fff;color:var(--ink-900);border-color:#fff}
.cta-panel .btn-primary:hover{background:#EDF1F7;border-color:#EDF1F7}
.cta-panel .btn-primary::after{display:none}
.cta-panel .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.cta-panel .btn-ghost:hover{color:var(--accent);border-color:var(--accent);background:rgba(63,167,155,.12)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.6);padding:76px 0 28px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);gap:44px}
.footer-brand .brand{margin-bottom:20px}
.footer-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.58);max-width:340px}
.footer-col h4{
  font-family:"Noto Sans SC",sans-serif;
  font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;
  margin-bottom:20px;position:relative;padding-bottom:12px;
}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:22px;height:1px;background:var(--star)}
.footer-col ul{display:grid;gap:12px}
.footer-col li a,.footer-col li span{font-size:14.5px;color:rgba(255,255,255,.6);line-height:1.6}
.footer-col li a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:56px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.45);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{display:none}
@media (max-width:860px){
  .mobile-tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;
    background:rgba(255,255,255,.97);
    border-top:1px solid var(--line);
    padding:6px 0 calc(6px + env(safe-area-inset-bottom));
    box-shadow:0 -8px 26px -20px rgba(11,16,32,.45);
  }
  .tab-item{
    flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;
    font-size:11.5px;color:var(--text-2);padding:6px 2px;
  }
  .tab-item svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
  .tab-item.active{color:var(--accent)}
  body{padding-bottom:calc(66px + env(safe-area-inset-bottom))}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .section{padding:84px 0}
  .zz-row{gap:40px}
  .kp-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-layout{grid-template-columns:1fr;gap:36px}
  .cta-panel{grid-template-columns:1fr;padding:52px 40px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px}
}

@media (max-width:768px){
  .container{padding:0 18px}
  .site-header .nav-login{display:none}
  .nav-inner{height:64px;gap:12px}
  .site-header.shrink .nav-inner{height:58px}
  .brand-text{font-size:15px}
  .cat-hero{padding:126px 0 72px}
  .cat-hero-lead{font-size:16px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:36px}
  .sec-desc{font-size:15.5px}
  .zz-row{grid-template-columns:1fr;gap:26px}
  .zz-row + .zz-row{margin-top:60px}
  .zz-row.reverse .zz-media{order:0}
  .zz-row.reverse .zz-text{order:0}
  .zz-media{aspect-ratio:16/9}
  .intro-wrap p{font-size:16px}
  .kp-grid{grid-template-columns:1fr}
  .kp-card{padding:26px 22px}
  .faq-item summary{font-size:16px;padding:20px 2px}
  .faq-answer{padding:0 12px 22px 2px;font-size:15px}
  .cta-panel{padding:42px 24px;border-radius:16px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .site-footer{padding:56px 0 24px}
  .footer-bottom{margin-top:40px;font-size:13px}
  .hero-actions .btn{flex:1 1 auto}
}

@media (max-width:520px){
  .brand-text{font-size:14px;max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .site-header .btn-sm{padding:9px 15px;font-size:13px}
  .cat-hero h1{font-size:28px}
  .hero-tag{font-size:12.5px;padding:6px 10px}
  .zz-index{font-size:32px}
  .cta-panel h2{font-size:22px}
}

@media (min-width:1440px){
  :root{--container:1280px}
  .cat-hero{padding:184px 0 116px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#0B1020;
  --ink-800:#121A2E;
  --ink-700:#1C2740;
  --paper-0:#FFFFFF;
  --paper-1:#F4F5F7;
  --paper-2:#EDEFF2;
  --accent:#3FA79B;
  --accent-soft:#E6F4F2;
  --star:#C7A96B;
  --text-1:#161B26;
  --text-2:#59637A;
  --text-3:#8A93A6;
  --line:#E3E6EC;
  --line-dark:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:11px;
  --r-input:10px;
  --shadow-1:0 1px 2px rgba(11,16,32,.06),0 8px 24px -12px rgba(11,16,32,.10);
  --shadow-2:0 16px 40px -16px rgba(11,16,32,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.82;
  color:var(--text-1);
  background:var(--paper-0);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  padding-bottom:0;
}
h1,h2,h3,h4,h5{
  font-family:"Noto Serif SC","Source Han Serif SC",Georgia,serif;
  font-weight:600;
  line-height:1.32;
  letter-spacing:-0.01em;
  margin:0;
}
p{margin:0;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease);}
img{max-width:100%;display:block;border-radius:12px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(18,26,46,.94);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line-dark);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.site-header.scrolled{background:rgba(11,16,32,.97);border-bottom-color:rgba(63,167,155,.24);}
.nav-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:78px;
  transition:height .3s var(--ease);
}
.site-header.scrolled .nav-inner{height:66px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;}
.brand-mark svg{width:28px;height:28px;}
.brand-text{
  font-family:"Noto Serif SC",serif;
  font-weight:700;
  font-size:18px;
  color:#fff;
  letter-spacing:0;
  white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:9px 14px;
  font-size:15px;
  color:rgba(255,255,255,.72);
  border-radius:9px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:3px;
  height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:#fff;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#fff;}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:16px;flex-shrink:0;}
.nav-login{
  font-size:14.5px;
  color:rgba(255,255,255,.72);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.nav-login:hover{color:var(--accent);border-bottom-color:var(--accent);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:500;
  line-height:1.2;
  border:1px solid transparent;
  position:relative;
  overflow:hidden;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{background:var(--ink-800);color:#fff;border-color:var(--ink-800);}
.btn-primary::after{
  content:"";
  position:absolute;
  top:0;left:-60%;
  width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.22),transparent);
  transform:skewX(-18deg);
  transition:left .55s var(--ease);
}
.btn-primary:hover{background:#1D2843;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:hover::after{left:120%;}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.06);transform:translateY(-1px);}
.on-dark .btn-ghost,.btn-ghost-dark{background:transparent;color:#E8ECF4;border-color:rgba(255,255,255,.22);}
.on-dark .btn-ghost:hover,.btn-ghost-dark:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.10);}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn-accent:hover{background:#358f85;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.link-more{
  font-size:14.5px;
  color:var(--accent);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  position:relative;
}
.link-more::after{
  content:"";
  position:absolute;left:0;bottom:-1px;width:100%;height:1px;
  background:var(--accent);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.link-more:hover::after{transform:scaleX(1);}

/* ============ 深色区通用 ============ */
.on-dark{color:#DDE3EE;}
.on-dark h1,.on-dark h2,.on-dark h3{color:#fff;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:#DDE3EE;
  isolation:isolate;
}
.page-hero .hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 40%;
  opacity:.62;
  z-index:-2;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(105deg,rgba(11,16,32,.94) 0%,rgba(11,16,32,.80) 46%,rgba(11,16,32,.58) 100%);
  z-index:-1;
}
.star-layer{position:absolute;inset:0;pointer-events:none;z-index:0;}
.star-layer span{
  position:absolute;
  width:2px;height:2px;
  border-radius:50%;
  background:rgba(255,255,255,.85);
  animation:twinkle 5s ease-in-out infinite;
}
.star-layer span:nth-child(1){top:14%;left:8%;animation-delay:.2s;}
.star-layer span:nth-child(2){top:24%;left:22%;animation-delay:1.1s;}
.star-layer span:nth-child(3){top:9%;left:38%;animation-delay:2.3s;}
.star-layer span:nth-child(4){top:31%;left:52%;animation-delay:.7s;}
.star-layer span:nth-child(5){top:17%;left:66%;animation-delay:3.1s;}
.star-layer span:nth-child(6){top:38%;left:79%;animation-delay:1.7s;}
.star-layer span:nth-child(7){top:12%;left:90%;animation-delay:2.7s;}
.star-layer span:nth-child(8){top:56%;left:14%;animation-delay:.9s;}
.star-layer span:nth-child(9){top:66%;left:44%;animation-delay:3.6s;}
.star-layer span:nth-child(10){top:72%;left:70%;animation-delay:2.1s;}
.star-layer span:nth-child(11){top:48%;left:88%;animation-delay:1.4s;}
.star-layer span:nth-child(12){top:80%;left:30%;animation-delay:4.2s;}
.star-layer span:nth-child(13){top:26%;left:4%;animation-delay:3.3s;background:rgba(199,169,107,.9);}
.star-layer span:nth-child(14){top:62%;left:60%;animation-delay:1.9s;background:rgba(199,169,107,.85);}
@keyframes twinkle{0%,100%{opacity:.4;}50%{opacity:.85;}}

.hero-inner{
  position:relative;
  z-index:2;
  padding:88px 0 92px;
  max-width:820px;
}
.crumb{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13.5px;
  color:rgba(255,255,255,.6);
  margin-bottom:26px;
}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:rgba(255,255,255,.28);}
.crumb .current{color:rgba(255,255,255,.9);}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--star);
  border:1px solid rgba(199,169,107,.55);
  background:rgba(199,169,107,.08);
  border-radius:5px;
  padding:5px 11px;
  margin-bottom:22px;
}
.hero-tag .dot{width:5px;height:5px;border-radius:50%;background:var(--star);}
.page-hero h1{
  font-size:48px;
  line-height:1.24;
  letter-spacing:-0.012em;
  color:#fff;
  margin-bottom:20px;
}
.hero-sub{
  font-size:17.5px;
  color:rgba(221,227,238,.88);
  margin-bottom:16px;
  max-width:640px;
}
.hero-desc{
  font-size:16px;
  color:rgba(221,227,238,.72);
  max-width:660px;
  margin-bottom:34px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.hero-marks{
  display:flex;
  flex-wrap:wrap;
  gap:12px 30px;
  font-size:13.5px;
  color:rgba(221,227,238,.7);
  border-top:1px solid var(--line-dark);
  padding-top:22px;
  max-width:700px;
}
.hero-marks span{display:inline-flex;align-items:center;gap:8px;}
.hero-marks i{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-sm{padding:72px 0;}
.section-tint{background:var(--paper-1);}
.section-dark{background:var(--ink-800);color:#DDE3EE;}
.section-dark h2,.section-dark h3{color:#fff;}

.sec-head{max-width:720px;margin-bottom:52px;}
.sec-head .eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:500;color:var(--accent);letter-spacing:.04em;margin-bottom:14px;
}
.sec-head .eyebrow::before{content:"";width:22px;height:1px;background:var(--star);}
.sec-head h2{font-size:36px;line-height:1.3;margin-bottom:16px;}
.sec-head p{font-size:16.5px;color:var(--text-2);max-width:640px;}
.section-dark .sec-head p{color:rgba(221,227,238,.74);}

/* ============ 介绍区 ============ */
.intro-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:56px;
  align-items:start;
}
.intro-copy p{color:var(--text-2);margin-bottom:20px;font-size:16.5px;}
.intro-copy p:last-child{margin-bottom:0;}
.intro-copy strong{color:var(--text-1);font-weight:600;}
.side-card{
  background:var(--paper-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px 28px;
  box-shadow:var(--shadow-1);
}
.side-card h3{font-size:20px;margin-bottom:18px;}
.side-list li{
  display:flex;
  gap:12px;
  padding:13px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--text-2);
}
.side-list li:last-child{border-bottom:none;padding-bottom:0;}
.side-list li:first-child{padding-top:0;}
.side-list .tick{
  flex-shrink:0;
  width:18px;height:18px;
  margin-top:5px;
  border-radius:50%;
  border:1.5px solid var(--accent);
  position:relative;
}
.side-list .tick::after{
  content:"";
  position:absolute;
  left:4px;top:7px;
  width:7px;height:1.5px;
  background:var(--accent);
  transform:rotate(-45deg);
  transform-origin:left center;
}

/* ============ 时间轴 ============ */
.timeline{
  position:relative;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:28px;
  margin-top:8px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:0;right:0;top:26px;
  height:1px;
  background:linear-gradient(90deg,var(--accent) 0%,rgba(63,167,155,.32) 55%,rgba(63,167,155,0) 100%);
}
.tl-item{position:relative;padding-top:64px;}
.tl-num{
  position:absolute;
  top:0;left:0;
  width:52px;height:52px;
  display:flex;align-items:center;justify-content:center;
  border-radius:14px;
  background:var(--paper-0);
  border:1px solid var(--line);
  font-family:"Noto Serif SC",serif;
  font-size:17px;
  font-weight:700;
  color:var(--accent);
  box-shadow:var(--shadow-1);
}
.tl-item h3{font-size:20px;margin-bottom:10px;}
.tl-item p{font-size:15px;color:var(--text-2);}
.tl-item .tl-note{
  display:inline-block;
  margin-top:12px;
  font-size:12.5px;
  color:var(--text-3);
  border:1px solid var(--line);
  border-radius:5px;
  padding:3px 9px;
  background:var(--paper-0);
}

/* ============ 卡片网格 ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--paper-0);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(63,167,155,.32);}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--ink-800);
}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,16,32,0) 45%,rgba(11,16,32,.45) 100%);
  pointer-events:none;
}
.card-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1;}
.badge{
  display:inline-block;
  font-size:12.5px;
  font-weight:500;
  padding:4px 10px;
  border-radius:5px;
  border:1px solid rgba(63,167,155,.36);
  background:rgba(63,167,155,.08);
  color:#2E7F76;
  margin-bottom:14px;
  align-self:flex-start;
}
.badge-warm{
  border-color:rgba(199,169,107,.5);
  background:rgba(199,169,107,.1);
  color:#8E7742;
}
.card-body h3{font-size:20px;line-height:1.42;margin-bottom:11px;}
.card-body p{font-size:15px;color:var(--text-2);margin-bottom:18px;flex:1;}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
  border-top:1px solid var(--line);
  padding-top:15px;
}

/* ============ 场景区 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.scene-item{
  border:1px solid var(--line-dark);
  border-radius:var(--r-card);
  padding:28px 26px;
  background:rgba(28,39,64,.62);
  transition:border-color .3s var(--ease),background .3s var(--ease),transform .3s var(--ease);
}
.scene-item:hover{border-color:rgba(63,167,155,.5);background:rgba(28,39,64,.9);transform:translateY(-2px);}
.scene-item .idx{
  font-family:"Noto Serif SC",serif;
  font-size:15px;
  font-weight:700;
  color:var(--star);
  letter-spacing:.06em;
  display:block;
  margin-bottom:14px;
}
.scene-item h3{font-size:19px;margin-bottom:10px;}
.scene-item p{font-size:15px;color:rgba(221,227,238,.74);}

/* ============ FAQ ============ */
.faq-wrap{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:56px;
  align-items:start;
}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  cursor:pointer;
  font-family:"Noto Serif SC",serif;
  font-size:18px;
  font-weight:600;
  color:var(--text-1);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--accent);}
.faq-icon{
  flex-shrink:0;
  width:22px;height:22px;
  margin-top:6px;
  position:relative;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:1.5px;}
.faq-icon::after{left:10px;top:0;width:1.5px;height:22px;transition:opacity .24s var(--ease);}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-answer{
  padding:0 0 24px;
  font-size:15.5px;
  color:var(--text-2);
  max-width:640px;
}
.faq-item[open] .faq-answer{animation:fadeUp .34s var(--ease);}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

/* ============ CTA ============ */
.cta-panel{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  background:var(--ink-800);
  border:1px solid var(--line-dark);
  padding:60px 56px;
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;
  align-items:center;
}
.cta-panel::before{
  content:"";
  position:absolute;
  top:-120px;right:-80px;
  width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(63,167,155,.20) 0%,rgba(63,167,155,0) 70%);
}
.cta-panel h2{font-size:32px;margin-bottom:16px;position:relative;}
.cta-panel p{color:rgba(221,227,238,.76);font-size:16px;position:relative;margin-bottom:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;}
.login-card{
  position:relative;
  background:rgba(11,16,32,.6);
  border:1px solid rgba(63,167,155,.34);
  border-radius:var(--r-card);
  padding:26px 24px;
}
.login-card .lc-top{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--star);margin-bottom:14px;
}
.login-card .lc-top .pulse{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  animation:twinkle 3.4s ease-in-out infinite;
}
.login-card h3{font-size:19px;margin-bottom:10px;color:#fff;}
.login-card p{font-size:14.5px;color:rgba(221,227,238,.72);margin-bottom:18px;}
.login-card ul li{
  font-size:14px;color:rgba(221,227,238,.66);
  display:flex;gap:9px;padding:6px 0;
}
.login-card ul li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);margin-top:9px;flex-shrink:0;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-800);
  color:rgba(221,227,238,.68);
  border-top:1px solid var(--line-dark);
  padding:72px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,2.6fr) minmax(0,2.6fr) minmax(0,3fr);
  gap:44px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14.5px;line-height:1.85;max-width:330px;color:rgba(221,227,238,.62);}
.footer-col h4{
  font-family:"Noto Serif SC",serif;
  font-size:15.5px;
  color:#fff;
  margin-bottom:18px;
  font-weight:600;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul li a,.footer-col ul li span{
  font-size:14.5px;
  color:rgba(221,227,238,.62);
  transition:color .22s var(--ease);
}
.footer-col ul li a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding:22px 0 26px;
  border-top:1px solid var(--line-dark);
  font-size:13.5px;
  color:rgba(221,227,238,.5);
}

/* ============ 移动端底部 Tab ============ */
.mobile-tabs{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:80;
  background:rgba(18,26,46,.97);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-top:1px solid var(--line-dark);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs ul{display:flex;}
.mobile-tabs li{flex:1;}
.mobile-tabs a{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  height:60px;
  font-size:11.5px;
  color:var(--text-3);
  transition:color .22s var(--ease);
}
.mobile-tabs a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.mobile-tabs a.active{color:var(--accent);}
.mobile-tabs a:hover{color:var(--accent);}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .nav-links{gap:2px;}
  .nav-link{padding:9px 11px;font-size:14.5px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-actions{margin-left:auto;}
  .hero-inner{padding:72px 0 76px;}
  .page-hero h1{font-size:38px;}
  .section{padding:76px 0;}
  .sec-head h2{font-size:30px;}
  .intro-grid{grid-template-columns:1fr;gap:34px;}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .timeline::before{display:none;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .faq-wrap{grid-template-columns:1fr;gap:30px;}
  .cta-panel{grid-template-columns:1fr;padding:44px 34px;gap:34px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}
}
@media (max-width:768px){
  body{font-size:16px;padding-bottom:64px;}
  .container{padding:0 18px;}
  .nav-inner{height:64px;gap:14px;}
  .site-header.scrolled .nav-inner{height:60px;}
  .brand-text{font-size:16px;}
  .nav-login{display:none;}
  .page-hero h1{font-size:30px;}
  .hero-sub{font-size:16px;}
  .hero-desc{font-size:15.5px;}
  .hero-inner{padding:56px 0 62px;}
  .hero-cta{gap:11px;}
  .btn{padding:12px 20px;font-size:14.5px;}
  .hero-marks{font-size:13px;gap:10px 20px;}
  .section{padding:60px 0;}
  .section-sm{padding:52px 0;}
  .sec-head{margin-bottom:34px;}
  .sec-head h2{font-size:25px;}
  .timeline{grid-template-columns:1fr;gap:26px;}
  .tl-item{padding-top:0;padding-left:64px;min-height:56px;}
  .tl-num{width:46px;height:46px;font-size:15px;}
  .card-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .faq-item summary{font-size:16.5px;padding:19px 0;}
  .cta-panel{padding:34px 22px;border-radius:16px;}
  .cta-panel h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:36px;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;padding:18px 0 22px;}
  .mobile-tabs{display:block;}
}
@media (max-width:520px){
  .page-hero h1{font-size:27px;}
  .hero-tag{font-size:12px;}
  .crumb{font-size:12.5px;flex-wrap:wrap;gap:7px;}
  .card-body{padding:20px 18px 22px;}
  .side-card{padding:24px 20px;}
  .scene-item{padding:22px 20px;}
}

/* roulang page: category3 */
:root{
    --ink-900:#0B1020;
    --ink-800:#121A2E;
    --ink-700:#1C2740;
    --paper-0:#FFFFFF;
    --paper-1:#F4F5F7;
    --paper-2:#EDEFF2;
    --accent:#3FA79B;
    --accent-soft:#E6F4F2;
    --star:#C7A96B;
    --text-1:#161B26;
    --text-2:#59637A;
    --text-3:#8A93A6;
    --line:#E3E6EC;
    --line-dark:rgba(255,255,255,.10);
    --r-card:16px;
    --r-btn:11px;
    --r-input:10px;
    --sh-1:0 1px 2px rgba(11,16,32,.06), 0 8px 24px -12px rgba(11,16,32,.10);
    --sh-2:0 16px 40px -16px rgba(11,16,32,.18);
    --serif:"Source Han Serif SC","Noto Serif SC","Songti SC",Georgia,serif;
    --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body.app-body{
    margin:0;
    font-family:var(--sans);
    font-size:16px;
    line-height:1.8;
    color:var(--text-1);
    background:var(--paper-0);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;}
  button{font-family:inherit;}
  h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:600;letter-spacing:-.01em;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:80;
    background:rgba(11,16,32,.86);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    border-bottom:1px solid transparent;
    transition:background .28s ease, border-color .28s ease;
  }
  .site-header.is-scrolled{background:rgba(11,16,32,.97);border-bottom-color:var(--line-dark);}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:78px;transition:height .28s ease;}
  .site-header.is-scrolled .nav-inner{height:66px;}
  .brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
  .brand-mark{display:inline-flex;width:26px;height:26px;}
  .brand-mark svg{width:100%;height:100%;}
  .brand-text{color:#fff;font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:-.01em;white-space:nowrap;}
  .nav-links{display:flex;align-items:center;gap:4px;}
  .nav-link{
    position:relative;padding:8px 14px;border-radius:9px;
    font-size:15px;color:rgba(255,255,255,.72);text-decoration:none;
    transition:color .2s ease, background .2s ease;
  }
  .nav-link:hover{color:#fff;background:rgba(255,255,255,.07);}
  .nav-link.active{color:#fff;}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
    background:var(--accent);border-radius:2px;
  }
  .nav-actions{display:flex;align-items:center;gap:16px;}
  .nav-login{
    font-size:14px;color:rgba(255,255,255,.74);text-decoration:none;
    border-bottom:1px solid transparent;padding-bottom:2px;
    transition:color .2s ease, border-color .2s ease;
  }
  .nav-login:hover{color:var(--accent);border-bottom-color:var(--accent);}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 24px;border-radius:var(--r-btn);border:1px solid transparent;
    font-size:15px;font-weight:500;line-height:1.2;text-decoration:none;cursor:pointer;
    transition:background .25s ease, color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
    position:relative;overflow:hidden;
  }
  .btn-sm{padding:9px 16px;font-size:14px;border-radius:10px;}
  .btn-primary{background:var(--ink-800);color:#fff;}
  .btn-primary:hover{background:#1B2540;transform:translateY(-1px);box-shadow:var(--sh-2);}
  .btn-primary::after{
    content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent);
    transform:skewX(-18deg);transition:left .55s ease;
  }
  .btn-primary:hover::after{left:120%;}
  .btn-light{background:#fff;color:var(--ink-900);}
  .btn-light:hover{background:#F2F4F8;transform:translateY(-1px);}
  .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
  .btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.08);}
  .btn-outline{background:transparent;color:var(--text-1);border-color:var(--line);}
  .btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(63,167,155,.06);}
  .btn:focus-visible,.nav-link:focus-visible,.nav-login:focus-visible,.tab-item:focus-visible,
  .faq-q:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

  /* ---------- Hero ---------- */
  .hero{position:relative;background:var(--ink-900);overflow:hidden;padding:154px 0 92px;}
  .hero-bg{
    position:absolute;inset:0;
    background-image:
      linear-gradient(102deg, rgba(11,16,32,.95) 0%, rgba(11,16,32,.87) 44%, rgba(11,16,32,.60) 100%),
      url(/assets/images/backpic/back-2.webp);
    background-size:cover;background-position:center;
  }
  .hero-stars{
    position:absolute;inset:0;pointer-events:none;
    background-image:
      radial-gradient(1.4px 1.4px at 11% 26%, rgba(255,255,255,.78), transparent),
      radial-gradient(1.2px 1.2px at 22% 68%, rgba(255,255,255,.62), transparent),
      radial-gradient(1.6px 1.6px at 33% 16%, rgba(199,169,107,.80), transparent),
      radial-gradient(1.2px 1.2px at 46% 78%, rgba(255,255,255,.55), transparent),
      radial-gradient(1.4px 1.4px at 58% 34%, rgba(255,255,255,.70), transparent),
      radial-gradient(1.2px 1.2px at 67% 62%, rgba(63,167,155,.80), transparent),
      radial-gradient(1.6px 1.6px at 78% 22%, rgba(255,255,255,.68), transparent),
      radial-gradient(1.2px 1.2px at 88% 72%, rgba(255,255,255,.58), transparent),
      radial-gradient(1.4px 1.4px at 94% 44%, rgba(199,169,107,.72), transparent),
      radial-gradient(1.2px 1.2px at 6% 84%, rgba(255,255,255,.52), transparent);
    animation:twinkle 5.4s ease-in-out infinite alternate;
  }
  @keyframes twinkle{from{opacity:.42;}to{opacity:.85;}}
  .hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
  .crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.5);margin-bottom:22px;}
  .crumb a{color:rgba(255,255,255,.62);text-decoration:none;transition:color .2s ease;}
  .crumb a:hover{color:var(--accent);}
  .crumb-cur{color:rgba(255,255,255,.86);}
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:500;color:var(--star);
    border:1px solid rgba(199,169,107,.45);border-radius:6px;
    padding:4px 11px;margin-bottom:22px;letter-spacing:.02em;
  }
  .hero-title{
    font-size:clamp(30px,4vw,52px);line-height:1.24;color:#fff;font-weight:600;
    letter-spacing:-.01em;margin-bottom:18px;
  }
  .hero-sub{font-size:18px;color:var(--accent);font-weight:500;margin-bottom:16px;}
  .hero-desc{font-size:16.5px;color:rgba(255,255,255,.70);line-height:1.9;max-width:560px;}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 30px;}
  .hero-marks{display:flex;flex-wrap:wrap;gap:10px 26px;}
  .hero-marks li{
    display:flex;align-items:center;gap:8px;
    font-size:13.5px;color:rgba(255,255,255,.66);
  }
  .hero-marks li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto;}
  .hero-media{
    position:relative;border-radius:18px;overflow:hidden;
    border:1px solid var(--line-dark);box-shadow:0 30px 70px -30px rgba(0,0,0,.7);
  }
  .hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}

  /* ---------- 通用板块 ---------- */
  .section{padding:104px 0;}
  .section-alt{background:var(--paper-1);}
  .section-dark{background:var(--ink-800);color:#fff;}
  .section-head{max-width:720px;margin-bottom:52px;}
  .eyebrow{display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.12em;color:var(--accent);margin-bottom:14px;}
  .section-title{font-size:clamp(24px,3vw,38px);line-height:1.32;color:var(--text-1);margin-bottom:16px;}
  .section-dark .section-title{color:#fff;}
  .section-desc{font-size:16.5px;color:var(--text-2);line-height:1.9;}
  .section-dark .section-desc{color:rgba(255,255,255,.68);}
  .divider-star{display:flex;align-items:center;gap:12px;margin:0 0 26px;}
  .divider-star span{height:1px;width:44px;background:var(--star);display:block;}
  .divider-star em{font-size:12.5px;color:var(--star);font-style:normal;letter-spacing:.1em;}

  /* ---------- 介绍区 ---------- */
  .intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
  .intro-text p{font-size:16.5px;color:var(--text-2);line-height:1.92;margin-bottom:20px;}
  .intro-text p:last-child{margin-bottom:0;}
  .intro-text strong{color:var(--text-1);font-weight:600;}
  .attr-panel{
    background:var(--ink-800);border-radius:18px;padding:30px 28px;color:#fff;
    box-shadow:var(--sh-1);
  }
  .attr-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line-dark);}
  .attr-head h3{font-size:19px;color:#fff;}
  .attr-head span{font-size:12px;color:var(--star);border:1px solid rgba(199,169,107,.45);border-radius:5px;padding:2px 8px;}
  .attr-row{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px solid var(--line-dark);font-size:14.5px;}
  .attr-row:last-child{border-bottom:0;padding-bottom:4px;}
  .attr-key{color:rgba(255,255,255,.58);flex:0 0 auto;}
  .attr-val{color:#fff;text-align:right;font-weight:500;}
  .intro-figure{margin-top:26px;border-radius:14px;overflow:hidden;border:1px solid var(--line);}
  .intro-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}

  /* ---------- 对比表 ---------- */
  .compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-1);}
  table.compare{width:100%;min-width:860px;border-collapse:collapse;}
  .compare th{
    text-align:left;padding:15px 22px;background:var(--paper-1);
    font-size:13px;font-weight:600;color:var(--text-2);letter-spacing:.02em;
    border-bottom:1px solid var(--line);white-space:nowrap;
  }
  .compare td{padding:17px 22px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-1);vertical-align:top;line-height:1.75;}
  .compare tbody tr:last-child td{border-bottom:0;}
  .compare tbody tr{transition:background .2s ease;}
  .compare tbody tr:hover{background:#FAFBFC;}
  .compare .v-name{font-family:var(--serif);font-weight:600;font-size:16px;}
  .scroll-hint{display:none;font-size:13px;color:var(--text-3);margin-top:12px;}
  .table-note{
    display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;
  }
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;font-weight:500;color:var(--text-2);
    background:var(--paper-1);border:1px solid var(--line);border-radius:6px;padding:4px 10px;
  }
  .badge-accent{color:var(--accent);background:var(--accent-soft);border-color:rgba(63,167,155,.32);}
  .badge-star{color:var(--star);background:rgba(199,169,107,.10);border-color:rgba(199,169,107,.42);}

  /* ---------- 卡片 ---------- */
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);padding:28px 26px;
    transition:transform .28s ease, box-shadow .28s ease, border-color .28s ease;
  }
  .card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(63,167,155,.34);}
  .card-icon{
    width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;
    background:var(--accent-soft);color:var(--accent);margin-bottom:18px;
  }
  .card-icon svg{width:22px;height:22px;}
  .card h3{font-size:19px;line-height:1.45;margin-bottom:10px;}
  .card p{font-size:15px;color:var(--text-2);line-height:1.85;}
  .card-media{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--paper-1);}
  .card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}

  .verify-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:52px;align-items:center;}
  .verify-list{margin-top:8px;}
  .verify-list li{
    display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);
  }
  .verify-list li:last-child{border-bottom:0;}
  .verify-num{
    font-family:var(--mono);font-size:14px;color:var(--accent);font-weight:600;
    flex:0 0 auto;padding-top:2px;
  }
  .verify-list h4{font-size:16.5px;margin-bottom:5px;}
  .verify-list p{font-size:15px;color:var(--text-2);line-height:1.8;}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
  .faq-side .section-title{margin-bottom:14px;}
  .faq-side p{font-size:15.5px;color:var(--text-2);line-height:1.9;}
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;background:none;border:0;text-align:left;cursor:pointer;
    padding:22px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:22px;
    font-size:17px;font-weight:500;color:var(--text-1);font-family:var(--sans);line-height:1.6;
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--accent);}
  .faq-icon{flex:0 0 auto;width:20px;height:20px;color:var(--accent);transition:transform .24s ease;margin-top:4px;}
  .faq-item.open .faq-icon{transform:rotate(45deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease;}
  .faq-item.open .faq-a{max-height:260px;}
  .faq-a-inner{padding:0 44px 24px 0;font-size:15.5px;color:var(--text-2);line-height:1.88;max-width:660px;}

  /* ---------- CTA ---------- */
  .cta-panel{
    position:relative;overflow:hidden;
    background:var(--ink-800);border-radius:20px;padding:56px;
    display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
  }
  .cta-panel::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      radial-gradient(1.4px 1.4px at 8% 22%, rgba(255,255,255,.62), transparent),
      radial-gradient(1.4px 1.4px at 24% 76%, rgba(199,169,107,.72), transparent),
      radial-gradient(1.2px 1.2px at 44% 30%, rgba(63,167,155,.75), transparent),
      radial-gradient(1.4px 1.4px at 62% 84%, rgba(255,255,255,.55), transparent),
      radial-gradient(1.2px 1.2px at 82% 18%, rgba(255,255,255,.60), transparent),
      radial-gradient(1.4px 1.4px at 92% 62%, rgba(199,169,107,.68), transparent);
    animation:twinkle 6s ease-in-out infinite alternate;
  }
  .cta-copy{position:relative;z-index:1;}
  .cta-copy h2{font-size:clamp(23px,2.8vw,34px);color:#fff;line-height:1.35;margin-bottom:16px;}
  .cta-copy p{font-size:16px;color:rgba(255,255,255,.68);line-height:1.9;max-width:520px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .login-card{
    position:relative;z-index:1;
    background:var(--ink-700);border:1px solid var(--line-dark);border-radius:16px;padding:28px;
  }
  .login-card h3{font-size:17px;color:#fff;margin-bottom:14px;}
  .login-card ul li{
    display:flex;align-items:center;gap:10px;
    font-size:14.5px;color:rgba(255,255,255,.72);
    padding:10px 0;border-bottom:1px solid var(--line-dark);
  }
  .login-card ul li:last-child{border-bottom:0;}
  .login-card ul li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--star);flex:0 0 auto;}
  .login-card .btn{width:100%;margin-top:20px;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink-800);color:rgba(255,255,255,.66);padding:76px 0 0;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;}
  .footer-brand .brand{margin-bottom:18px;}
  .footer-brand p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.58);max-width:330px;}
  .footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;font-family:var(--sans);font-weight:600;}
  .footer-col ul li{margin-bottom:11px;font-size:14.5px;color:rgba(255,255,255,.58);line-height:1.7;}
  .footer-col ul li a{text-decoration:none;color:rgba(255,255,255,.58);transition:color .2s ease;}
  .footer-col ul li a:hover{color:var(--accent);}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    border-top:1px solid var(--line-dark);padding:22px 0 26px;
    font-size:13.5px;color:rgba(255,255,255,.46);
  }

  /* ---------- 移动端底部 Tab ---------- */
  .mobile-tab{
    position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;
    background:rgba(11,16,32,.98);
    border-top:1px solid var(--line-dark);
    padding-bottom:env(safe-area-inset-bottom);
    backdrop-filter:blur(8px);
  }
  .tab-item{
    display:flex;flex-direction:column;align-items:center;gap:5px;
    padding:10px 4px 11px;text-decoration:none;
    font-size:11px;color:var(--text-3);transition:color .2s ease;
  }
  .tab-item svg{width:20px;height:20px;}
  .tab-item.active{color:var(--accent);}
  .tab-item:hover{color:#fff;}

  /* ---------- 动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease, transform .55s ease;}
  .reveal.in{opacity:1;transform:none;}

  @media (prefers-reduced-motion: reduce){
    *{animation:none !important;transition:none !important;}
    .reveal{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1280px){
    .container{padding:0 22px;}
  }
  @media (max-width:1024px){
    .nav-inner{height:70px;}
    .hero{padding:132px 0 76px;}
    .hero-inner{grid-template-columns:1fr;gap:40px;}
    .hero-media{max-width:620px;}
    .intro-grid{grid-template-columns:1fr;gap:40px;}
    .verify-grid{grid-template-columns:1fr;gap:36px;}
    .faq-grid{grid-template-columns:1fr;gap:32px;}
    .cta-panel{grid-template-columns:1fr;gap:34px;padding:44px 36px;}
    .grid-3{grid-template-columns:repeat(2,1fr);gap:22px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
    .compare-wrap{scrollbar-width:thin;}
    .scroll-hint{display:block;}
  }
  @media (max-width:768px){
    .nav-links{display:none;}
    .nav-login{display:none;}
    .nav-inner{height:64px;}
    .brand-text{font-size:15.5px;}
    .section{padding:64px 0;}
    .section-head{margin-bottom:34px;}
    .hero{padding:112px 0 60px;}
    .hero-desc{font-size:15.5px;}
    .hero-cta{margin:26px 0 24px;}
    .btn{padding:12px 20px;font-size:14.5px;flex:1 1 auto;}
    .hero-cta .btn{flex:1 1 46%;}
    .mobile-tab{display:grid;grid-template-columns:repeat(4,1fr);}
    .main-content{padding-bottom:calc(72px + env(safe-area-inset-bottom));}
    .grid-3{grid-template-columns:1fr;}
    .card{padding:24px 22px;}
    .cta-panel{padding:34px 24px;border-radius:16px;}
    .cta-actions .btn{flex:1 1 100%;}
    .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:38px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;font-size:13px;}
    .faq-a-inner{padding-right:0;}
    .hero-media{max-width:100%;}
  }
  @media (max-width:520px){
    .container{padding:0 16px;}
    .hero-title{font-size:29px;}
    .hero-sub{font-size:16px;}
    .hero-badge{font-size:12px;}
    .section-title{font-size:23px;}
    .hero-marks{gap:8px 18px;}
    .hero-marks li{font-size:13px;}
  }