/* roulang page: index */
:root{
  --bg-0:#060A12;--bg-1:#0A1120;--bg-2:#0F1A2C;
  --glass:rgba(150,200,255,.06);--stroke:rgba(140,190,255,.14);--line:rgba(255,255,255,.08);
  --brand:#1FD1A5;--brand-2:#4DE8C2;--brand-deep:#12A98B;--accent:#FFB020;--alert:#FF5A5F;
  --text:#E8F1FF;--text-2:#9DB0C9;--text-3:#66788F;--btn-text:#04140F;
  --glow:0 0 0 1px rgba(31,209,165,.35),0 8px 28px rgba(31,209,165,.22);
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --r-lg:16px;--r-md:12px;--r-pill:999px;
  --maxw:1200px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --num:ui-monospace,"SFMono-Regular","Cascadia Mono","Roboto Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;background:var(--bg-0);color:var(--text);font-family:var(--font);
  font-size:16px;line-height:1.75;letter-spacing:.01em;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 600px at 12% -6%,rgba(31,209,165,.08),transparent 70%),
    radial-gradient(820px 560px at 96% 78%,rgba(255,176,32,.07),transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.03;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:56px 56px;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em;color:var(--text);word-break:break-word;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-family:var(--num);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

.wrap{position:relative;z-index:1}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0;border-top:1px solid var(--line)}
.section:first-of-type{border-top:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#1FD1A5,#12A98B);color:var(--btn-text);box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,209,165,.5),0 14px 34px rgba(31,209,165,.3);color:var(--btn-text)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.3)}
.btn-ghost{background:var(--glass);border-color:var(--stroke);color:var(--brand-2);backdrop-filter:blur(10px)}
.btn-ghost:hover{background:rgba(31,209,165,.12);border-color:rgba(31,209,165,.42);transform:translateY(-1px);color:var(--brand-2)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-2)}
.link-more svg{transition:transform .2s ease}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.02em;background:rgba(31,209,165,.14);color:var(--brand-2)}
.badge-accent{background:rgba(255,176,32,.14);color:var(--accent)}
.badge-mute{background:rgba(157,176,201,.12);color:var(--text-2)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:transparent;transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;border-bottom:1px solid transparent}
.site-header.is-stuck{background:rgba(8,14,24,.82);backdrop-filter:blur(16px) saturate(130%);border-bottom-color:var(--stroke);box-shadow:0 8px 30px rgba(0,0,0,.4)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.nav-left{display:flex;align-items:center;gap:32px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:16px;letter-spacing:.02em}
.brand:hover{color:var(--text)}
.brand-mark{width:24px;height:24px;flex:0 0 24px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;font-size:14px;font-weight:600;color:var(--text-2);padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand-2);transition:width .2s ease}
.nav-links a:hover{color:var(--brand-2)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{width:100%;background:var(--brand)}
.nav-right{display:flex;align-items:center;gap:14px}
.icon-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;background:var(--glass);border:1px solid var(--stroke);color:var(--text-2);cursor:pointer;transition:all .2s ease}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(31,209,165,.4)}
.burger{display:none}
.drawer{position:fixed;inset:0;z-index:80;background:rgba(6,10,18,.96);backdrop-filter:blur(18px);
  transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .25s ease;padding:20px 24px 32px;overflow-y:auto}
.drawer.open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:48px;margin-bottom:18px}
.drawer-nav a{display:flex;align-items:center;height:52px;font-size:16px;font-weight:600;color:var(--text-2);border-bottom:1px solid var(--line)}
.drawer-nav a.active,.drawer-nav a:hover{color:var(--brand-2)}
.drawer-cta{margin-top:24px}

/* ---------- hero ---------- */
.hero{padding:112px 0 96px;position:relative}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start}
.hero h1{font-size:40px;line-height:1.24;margin-bottom:20px}
.hero .lede{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.metrics{display:flex;gap:36px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--line)}
.metric-num{font-size:26px;font-weight:700;color:var(--brand-2);line-height:1.2}
.metric-num span{font-size:13px;color:var(--text-3);margin-left:4px;font-weight:400}
.metric-label{font-size:13px;color:var(--text-3);margin-top:2px}
.hero-visual{position:relative;padding-bottom:34px}
.hero-visual .frame{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow-card)}
.hero-visual .frame::after{content:"";position:absolute;inset:0;background:
  radial-gradient(70% 60% at 20% 10%,rgba(31,209,165,.18),transparent 65%),
  radial-gradient(60% 55% at 90% 95%,rgba(255,176,32,.14),transparent 68%);pointer-events:none}
.hero-visual .frame img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-mini{position:absolute;right:14px;bottom:0;width:132px;height:86px;border-radius:14px;overflow:hidden;
  border:1px solid var(--stroke);box-shadow:0 14px 34px rgba(0,0,0,.55);background:var(--bg-2)}
.hero-mini img{width:100%;height:100%;object-fit:cover}

/* ---------- section head ---------- */
.sec-head{margin-bottom:40px}
.sec-no{display:inline-block;font-family:var(--num);font-size:12px;font-weight:700;letter-spacing:.16em;
  color:var(--brand);opacity:.6;margin-bottom:12px}
.sec-head h2{font-size:30px;line-height:1.3;margin-bottom:12px}
.sec-head .sub{font-size:15px;color:var(--text-2);max-width:680px}

/* ---------- feature group ---------- */
.feature-layout{display:grid;grid-template-columns:3fr 9fr;gap:36px;align-items:start}
.feature-aside{position:sticky;top:96px}
.feature-aside h3{font-size:20px;margin-bottom:10px}
.feature-aside p{font-size:14px;color:var(--text-2);line-height:1.75}
.feature-cards{display:grid;grid-template-columns:1.15fr 1fr;gap:20px}
.fcard{background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-lg);padding:26px;
  backdrop-filter:blur(14px) saturate(120%);transition:all .25s ease}
.fcard:hover{border-color:rgba(31,209,165,.4);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.fcard.tall{grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between;gap:20px}
.fcard h4{font-size:18px;margin-bottom:10px}
.fcard p{font-size:14px;color:var(--text-2);margin-bottom:16px}
.fcard .fpic{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.fcard .fpic img{width:100%;aspect-ratio:16/10;object-fit:cover}
.fcard .ic{width:38px;height:38px;border-radius:10px;background:rgba(31,209,165,.12);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--brand-2)}
.bar-card{display:flex;align-items:center;gap:20px;margin-top:20px;padding:22px 26px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--stroke);backdrop-filter:blur(14px) saturate(120%);transition:all .25s ease}
.bar-card:hover{border-color:rgba(255,176,32,.38);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.bar-card .bar-ic{width:44px;height:44px;flex:0 0 44px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;background:rgba(255,176,32,.12);color:var(--accent)}
.bar-card .bar-txt{flex:1;min-width:0}
.bar-card h4{font-size:17px;margin-bottom:4px}
.bar-card p{font-size:14px;color:var(--text-2)}

/* ---------- scenario strip ---------- */
.scene-strip{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-strip::before{content:"";position:absolute;top:19px;left:6%;right:6%;height:1px;background:var(--line)}
.scene{position:relative;padding-top:52px}
.scene .dot{position:absolute;top:0;left:0;width:38px;height:38px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;background:var(--bg-1);border:1px solid rgba(31,209,165,.45);color:var(--brand-2);
  font-family:var(--num);font-size:13px;font-weight:700}
.scene h4{font-size:17px;margin-bottom:8px}
.scene p{font-size:14px;color:var(--text-2)}
.scene .thumb{margin-top:16px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.scene .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ---------- proof ---------- */
.databar{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:28px;border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(31,209,165,.07),rgba(15,26,44,.5));border:1px solid var(--stroke);margin-bottom:28px}
.databar .cell{text-align:center}
.databar .k{font-size:32px;font-weight:700;color:var(--brand-2)}
.databar .k em{font-style:normal;font-size:15px;color:var(--text-3);margin-left:4px}
.databar .v{font-size:13px;color:var(--text-2);margin-top:4px}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.case-card{background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-lg);overflow:hidden;
  backdrop-filter:blur(14px) saturate(120%);transition:all .25s ease}
.case-card:hover{border-color:rgba(31,209,165,.4);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.case-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.case-body{padding:24px}
.case-body h4{font-size:18px;margin:12px 0 10px}
.case-body p{font-size:14px;color:var(--text-2)}
.case-result{display:flex;gap:24px;margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.case-result b{display:block;font-size:20px;color:var(--accent)}
.case-result span{font-size:12px;color:var(--text-3)}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan{display:flex;flex-direction:column;padding:28px;border-radius:var(--r-lg);background:var(--glass);
  border:1px solid var(--stroke);backdrop-filter:blur(14px) saturate(120%);transition:all .25s ease}
.plan:hover{transform:translateY(-2px);border-color:rgba(31,209,165,.35);box-shadow:var(--shadow-card)}
.plan.hot{border-color:rgba(31,209,165,.55);box-shadow:var(--glow);background:linear-gradient(180deg,rgba(31,209,165,.08),rgba(15,26,44,.4))}
.plan h3{font-size:19px;margin-bottom:6px}
.plan .tag{font-size:13px;color:var(--text-3);margin-bottom:18px}
.plan .price{font-size:34px;font-weight:700;color:var(--text);line-height:1.2}
.plan .price em{font-style:normal;font-size:14px;color:var(--text-3);font-weight:400;margin-left:4px}
.plan ul{margin:20px 0 24px;display:flex;flex-direction:column;gap:12px}
.plan li{display:flex;gap:10px;font-size:14px;color:var(--text-2)}
.plan li svg{flex:0 0 16px;margin-top:5px;color:var(--brand)}
.plan .btn{margin-top:auto;width:100%}
.legend{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:28px}
.legend div{padding:20px 22px;border-radius:var(--r-md);background:rgba(15,26,44,.5);border:1px solid var(--line)}
.legend dt{font-size:14px;font-weight:700;color:var(--brand-2);margin-bottom:8px}
.legend dd{margin:0;font-size:14px;color:var(--text-2);line-height:1.8}

/* ---------- news ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--r-lg);overflow:hidden;backdrop-filter:blur(14px) saturate(120%);transition:all .25s ease}
.news-card:hover{border-color:rgba(31,209,165,.4);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.news-card .thumb{overflow:hidden;border-bottom:1px solid var(--line)}
.news-card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease}
.news-card:hover .thumb img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body .meta{font-size:13px;color:var(--text-3);margin-top:auto;display:flex;align-items:center;gap:10px}
.news-card a.tile{display:flex;flex-direction:column;height:100%;color:inherit}
.news-card a.tile:hover{color:inherit}
.empty-state{grid-column:1/-1;text-align:center;padding:56px 24px;border:1px dashed var(--stroke);border-radius:var(--r-lg);
  background:rgba(15,26,44,.4);display:flex;flex-direction:column;align-items:center;gap:14px}
.empty-state svg{color:var(--text-3)}
.empty-state p{font-size:15px;color:var(--text-2)}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;font-size:16px;font-weight:600;color:var(--text);transition:color .2s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-2)}
.faq-item summary .pm{position:relative;flex:0 0 18px;width:18px;height:18px}
.faq-item summary .pm::before,.faq-item summary .pm::after{content:"";position:absolute;background:var(--brand-2);transition:transform .25s ease}
.faq-item summary .pm::before{top:8px;left:0;width:18px;height:2px}
.faq-item summary .pm::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] summary .pm::after{transform:rotate(90deg);opacity:0}
.faq-item .ans{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:740px}

/* ---------- cta ---------- */
.cta-band{position:relative;overflow:hidden;border:1px solid var(--stroke);border-radius:var(--r-lg);
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:linear-gradient(120deg,rgba(31,209,165,.09),rgba(10,17,32,.6) 55%,rgba(255,176,32,.08))}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(320px 200px at 88% 20%,rgba(255,176,32,.14),transparent 70%)}
.cta-band h2{font-size:28px;margin-bottom:10px;position:relative}
.cta-band p{font-size:15px;color:var(--text-2);position:relative}
.cta-band .actions{display:flex;gap:14px;flex-wrap:wrap;position:relative}

/* ---------- footer ---------- */
.site-footer{margin-top:0;border-top:1px solid var(--stroke);background:linear-gradient(180deg,rgba(10,17,32,.6),rgba(6,10,18,.95));position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.footer-grid h5{font-size:14px;font-weight:700;color:var(--text);margin:0 0 16px;letter-spacing:.04em}
.footer-grid li{margin-bottom:10px}
.footer-grid li a,.footer-grid p{font-size:14px;color:var(--text-2);line-height:1.8}
.footer-grid li a:hover{color:var(--brand-2)}
.footer-brand p{margin-top:14px;font-size:14px;color:var(--text-2);max-width:320px}
.footer-brand .brand{margin-bottom:4px}
.footer-bottom{border-top:1px solid var(--line);padding:18px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:12px;color:var(--text-3)}
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;border:1px solid var(--stroke);
  background:rgba(15,26,44,.85);backdrop-filter:blur(12px);color:var(--text-2);display:flex;align-items:center;
  justify-content:center;cursor:pointer;z-index:70;opacity:0;visibility:hidden;transition:all .25s ease}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{color:var(--brand-2);box-shadow:var(--glow);border-color:rgba(31,209,165,.45)}

/* ---------- search overlay ---------- */
.search-overlay{position:fixed;inset:0;z-index:90;background:rgba(6,10,18,.94);backdrop-filter:blur(16px);
  display:none;align-items:flex-start;justify-content:center;padding:120px 24px}
.search-overlay.open{display:flex}
.search-box{width:100%;max-width:620px;background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-lg);padding:20px}
.search-box form{display:flex;gap:12px}
.search-box input{flex:1;height:48px;padding:0 16px;border-radius:10px;background:rgba(6,10,18,.7);
  border:1px solid var(--stroke);color:var(--text);outline:none}
.search-box input:focus{border-color:rgba(31,209,165,.5)}
.search-box .hint{margin-top:12px;font-size:13px;color:var(--text-3)}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .fcard,.plan,.news-card,.case-card,.bar-card,.search-overlay,.to-top{backdrop-filter:none}
  .fcard,.plan,.news-card,.case-card,.bar-card{background:#0E1828}
  .site-header.is-stuck{backdrop-filter:none;background:rgba(8,14,24,.96)}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero{padding:80px 0 64px}
  .feature-layout{grid-template-columns:1fr;gap:24px}
  .feature-aside{position:static}
  .section{padding:64px 0}
  .scene-strip{grid-template-columns:repeat(2,1fr);gap:28px}
  .scene-strip::before{display:none}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
  .nav-links{display:none}
  .burger{display:inline-flex}
  .nav-right .btn-primary{display:none}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .hero h1{font-size:28px;line-height:1.34}
  .hero .lede{font-size:16px}
  .sec-head h2{font-size:24px}
  .cta-band h2{font-size:22px}
  .feature-cards{grid-template-columns:1fr}
  .fcard.tall{grid-row:auto}
  .scene-strip{grid-template-columns:1fr}
  .databar{grid-template-columns:1fr;gap:24px;padding:24px}
  .case-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .legend{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 24px}
  .section{padding:48px 0}
  .nav-inner{height:56px}
  .to-top{right:16px;bottom:16px}
  .footer-grid{grid-template-columns:1fr}
  .hero-mini{width:104px;height:70px}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A12;
  --bg-1:#0A1120;
  --bg-2:#0F1A2C;
  --glass:rgba(150,200,255,.06);
  --stroke:rgba(140,190,255,.14);
  --line:rgba(255,255,255,.08);
  --brand:#1FD1A5;
  --brand-2:#4DE8C2;
  --brand-deep:#12A98B;
  --accent:#FFB020;
  --alert:#FF5A5F;
  --text:#E8F1FF;
  --text-2:#9DB0C9;
  --text-3:#66788F;
  --glow:0 0 0 1px rgba(31,209,165,.35), 0 8px 28px rgba(31,209,165,.22);
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --r-lg:16px;
  --r-md:12px;
  --r-pill:999px;
  --font-cn:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:28px;
  color:var(--text);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 620px at 12% -6%, rgba(31,209,165,.075), transparent 62%),
    radial-gradient(1000px 700px at 104% 88%, rgba(255,176,32,.06), transparent 60%),
    linear-gradient(transparent 31px, rgba(255,255,255,.03) 32px),
    linear-gradient(90deg, transparent 31px, rgba(255,255,255,.03) 32px);
  background-size:auto,auto,32px 32px,32px 32px;
  background-attachment:fixed,fixed,scroll,scroll;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-2);text-decoration:none;transition:color .2s ease,background-color .2s ease;}
a:hover,a:focus{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,p{margin:0;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
section{position:relative;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .2s ease,box-shadow .25s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  height:48px;color:#04140F;
  background:linear-gradient(135deg,#1FD1A5,#12A98B);
  box-shadow:var(--glow);
}
.btn-primary:hover{color:#04140F;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,209,165,.5),0 12px 34px rgba(31,209,165,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.28);}
.btn-ghost{
  color:var(--brand-2);background:var(--glass);
  border:1px solid var(--stroke);
}
.btn-ghost:hover{color:var(--brand-2);background:rgba(31,209,165,.12);border-color:rgba(31,209,165,.45);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);background:rgba(31,209,165,.18);}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-2);}
.link-arrow svg{transition:transform .2s ease;}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;line-height:1;
  color:var(--brand-2);background:rgba(31,209,165,.14);
}
.badge-accent{color:var(--accent);background:rgba(255,176,32,.14);}
.badge-mute{color:var(--text-2);background:rgba(255,255,255,.07);}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,18,.72);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.scrolled{
  background:rgba(8,13,24,.92);
  border-bottom-color:var(--line);
  backdrop-filter:blur(14px) saturate(120%);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;gap:16px;
}
.header-left,.header-right{display:flex;align-items:center;gap:26px;}
.header-right{gap:12px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:16px;letter-spacing:.01em;}
.brand:hover{color:var(--text);}
.brand-mark{width:24px;height:24px;flex:0 0 24px;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;padding:6px 0;
  font-size:14px;font-weight:600;color:var(--text-2);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand-2);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--text);}
.nav-links a.active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:3px;height:16px;border-radius:2px;background:var(--brand);
}
.icon-btn{
  width:40px;height:40px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--stroke);background:var(--glass);color:var(--text-2);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(31,209,165,.45);background:rgba(31,209,165,.1);}
.menu-toggle{display:none;}

/* 搜索条 */
.search-bar{
  max-height:0;overflow:hidden;
  transition:max-height .25s ease;
  border-top:1px solid transparent;
}
.search-bar.open{max-height:96px;border-top-color:var(--line);}
.search-inner{display:flex;align-items:center;gap:12px;padding:14px 24px;max-width:1200px;margin:0 auto;}
.search-inner input{
  flex:1;height:46px;padding:0 16px;border-radius:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--stroke);color:var(--text);
}
.search-inner input::placeholder{color:var(--text-3);}
.search-inner input:focus{outline:none;border-color:rgba(31,209,165,.5);box-shadow:0 0 0 3px rgba(31,209,165,.12);}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(7,12,22,.96);
  backdrop-filter:blur(16px) saturate(120%);
  display:flex;flex-direction:column;
  transform:translateX(100%);opacity:0;pointer-events:none;
  transition:transform .25s ease,opacity .25s ease;
}
.mobile-drawer.open{transform:translateX(0);opacity:1;pointer-events:auto;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:56px;padding:0 16px;border-bottom:1px solid var(--line);}
.drawer-nav{padding:8px 16px;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 4px;font-size:16px;font-weight:600;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-2);}
.drawer-bottom{padding:16px;border-top:1px solid var(--line);}
.drawer-bottom .btn{width:100%;}

/* ============ 页面首屏 ============ */
.page-hero{padding:96px 0 44px;position:relative;}
.breadcrumb{margin-bottom:24px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--text-3);}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb [aria-current] {color:var(--text-2);}
.hero-grid{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.hero-copy{max-width:660px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;
  border-radius:var(--r-pill);background:rgba(31,209,165,.12);
  color:var(--brand-2);font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:18px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}
.page-hero h1{
  font-size:40px;line-height:48px;font-weight:700;letter-spacing:.01em;
  word-break:break-word;
}
.page-hero h1 em{font-style:normal;color:var(--brand-2);}
.hero-sub{margin-top:16px;font-size:16px;line-height:28px;color:var(--text-2);max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:10px;}
.hero-meta .metric{min-width:110px;}
.hero-meta .metric b{display:block;font-size:26px;line-height:32px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;}
.hero-meta .metric span{font-size:13px;color:var(--text-3);}

/* 横幅 */
.page-banner{
  position:relative;margin-top:44px;border-radius:20px;overflow:hidden;
  border:1px solid var(--stroke);box-shadow:var(--shadow-card);
  aspect-ratio:16/6;background:var(--bg-2);
}
.page-banner img{width:100%;height:100%;object-fit:cover;opacity:.72;}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,10,18,.86) 0%,rgba(6,10,18,.32) 55%,rgba(6,10,18,.1) 100%);
}
.banner-caption{
  position:absolute;left:28px;bottom:24px;right:28px;z-index:2;
  font-size:15px;line-height:26px;color:var(--text);max-width:620px;
}

/* ============ 板块通用 ============ */
.section{padding:72px 0;}
.section-head{margin-bottom:36px;max-width:760px;}
.sec-num{
  display:block;font-size:12px;font-weight:700;letter-spacing:.22em;
  color:var(--brand);opacity:.75;font-variant-numeric:tabular-nums;margin-bottom:12px;
}
.section-head h2{font-size:30px;line-height:38px;font-weight:700;letter-spacing:.01em;}
.section-head p{margin-top:12px;font-size:15px;line-height:26px;color:var(--text-2);}

/* ============ 主体两栏 ============ */
.layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start;}
.list-item{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:22px;
  padding:22px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .25s ease;
  margin-bottom:20px;
}
.list-item:hover{
  transform:translateY(-2px);
  background:rgba(150,200,255,.1);
  border-color:rgba(31,209,165,.4);
  box-shadow:var(--shadow-card);
}
.item-thumb{
  border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/10;background:var(--bg-2);
  border:1px solid var(--stroke);
}
.item-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.list-item:hover .item-thumb img{transform:scale(1.04);}
.item-body{min-width:0;}
.item-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.item-body h3{font-size:20px;line-height:28px;font-weight:600;letter-spacing:.01em;}
.item-body h3 a{color:var(--text);}
.item-body h3 a:hover{color:var(--brand-2);}
.item-body p{margin-top:10px;font-size:14px;line-height:25px;color:var(--text-2);}
.item-meta{
  display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;padding-top:14px;
  border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.item-meta strong{color:var(--text-2);font-weight:600;}

/* 侧栏 */
.sidebar{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  padding:24px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(14px) saturate(120%);
}
.side-card h3{font-size:16px;font-weight:600;margin-bottom:16px;letter-spacing:.01em;}
.side-nav li+li{margin-top:4px;}
.side-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:0 12px;border-radius:10px;
  font-size:14px;font-weight:600;color:var(--text-2);
  border:1px solid transparent;transition:all .2s ease;
}
.side-nav a:hover{color:var(--brand-2);background:rgba(31,209,165,.1);border-color:var(--stroke);}
.side-nav a.active{color:var(--brand-2);background:rgba(31,209,165,.12);border-color:rgba(31,209,165,.38);}
.side-nav a.active::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);}
.hot-list li+li{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);}
.hot-list a{display:grid;grid-template-columns:64px minmax(0,1fr);gap:12px;align-items:center;}
.hot-list .hot-thumb{aspect-ratio:16/10;border-radius:8px;overflow:hidden;border:1px solid var(--stroke);background:var(--bg-2);}
.hot-list .hot-thumb img{width:100%;height:100%;object-fit:cover;}
.hot-list b{display:block;font-size:14px;font-weight:600;color:var(--text);line-height:22px;}
.hot-list span{display:block;font-size:12px;color:var(--text-3);margin-top:2px;}
.hot-list a:hover b{color:var(--brand-2);}
.side-cta{
  padding:24px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(31,209,165,.14),rgba(15,26,44,.6));
  border:1px solid rgba(31,209,165,.32);
  box-shadow:0 12px 34px rgba(31,209,165,.14);
}
.side-cta h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.side-cta p{font-size:13px;line-height:24px;color:var(--text-2);}
.sub-form{display:flex;flex-direction:column;gap:10px;margin-top:16px;}
.sub-form input{
  height:44px;padding:0 14px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid var(--stroke);color:var(--text);
}
.sub-form input::placeholder{color:var(--text-3);}
.sub-form input:focus{outline:none;border-color:rgba(31,209,165,.5);box-shadow:0 0 0 3px rgba(31,209,165,.12);}
.form-tip{font-size:12px;color:var(--text-3);line-height:20px;}
.form-tip.ok{color:var(--brand-2);}

/* ============ 数据条 ============ */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
  padding:28px;border-radius:var(--r-lg);
  background:var(--bg-1);border:1px solid var(--stroke);
}
.stat{border-left:3px solid rgba(31,209,165,.35);padding-left:18px;}
.stat-num{font-size:34px;line-height:40px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.stat-unit{font-size:14px;font-weight:600;color:var(--brand-2);margin-left:4px;}
.stat p{margin-top:6px;font-size:13px;line-height:22px;color:var(--text-3);}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;position:relative;}
.flow::before{
  content:"";position:absolute;top:22px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,rgba(31,209,165,.05),rgba(31,209,165,.4),rgba(31,209,165,.05));
}
.flow-step{position:relative;padding-top:56px;}
.flow-dot{
  position:absolute;top:8px;left:0;
  width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:#04140F;font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#1FD1A5,#12A98B);
  box-shadow:0 0 0 5px rgba(31,209,165,.12);
}
.flow-step h3{font-size:17px;font-weight:600;line-height:26px;}
.flow-step p{margin-top:8px;font-size:14px;line-height:25px;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;}
.faq-item{
  background:var(--glass);border:1px solid var(--stroke);
  border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,background-color .2s ease;
}
.faq-item[open]{border-color:rgba(31,209,165,.36);background:rgba(150,200,255,.09);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-2);}
.faq-sign{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--stroke);color:var(--brand-2);font-size:16px;line-height:1;
  transition:transform .25s ease,background-color .25s ease;
}
.faq-item[open] .faq-sign{transform:rotate(45deg);background:rgba(31,209,165,.16);}
.faq-answer{padding:0 22px 20px;font-size:15px;line-height:28px;color:var(--text-2);}

/* ============ CTA ============ */
.cta-band{
  padding:48px 40px;border-radius:20px;
  background:linear-gradient(120deg,rgba(31,209,165,.13),rgba(15,26,44,.72) 55%,rgba(255,176,32,.09));
  border:1px solid var(--stroke);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;width:520px;height:520px;right:-160px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,209,165,.16),transparent 68%);
}
.cta-band h2{font-size:28px;line-height:38px;font-weight:700;position:relative;}
.cta-band p{margin-top:10px;font-size:15px;line-height:26px;color:var(--text-2);max-width:560px;position:relative;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:72px;padding:64px 0 0;
  background:linear-gradient(180deg,rgba(10,17,32,.4),rgba(6,10,18,1));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:25px;color:var(--text-2);max-width:320px;}
.footer-grid h5{font-size:14px;font-weight:700;color:var(--text);margin-bottom:18px;letter-spacing:.02em;}
.footer-grid ul li+li{margin-top:10px;}
.footer-grid ul a{font-size:14px;color:var(--text-2);}
.footer-grid ul a:hover{color:var(--brand-2);}
.footer-bottom{
  margin-top:48px;padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12px;line-height:20px;color:var(--text-3);}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--stroke);color:var(--brand-2);
  backdrop-filter:blur(12px);
  opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,box-shadow .25s ease;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{box-shadow:var(--glow);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .site-header.scrolled{backdrop-filter:none;}
  .glass,.list-item,.side-card,.side-cta,.faq-item,.stat-strip,.mobile-drawer{
    backdrop-filter:none;
  }
  .list-item,.side-card,.faq-item{background:#0E1828;}
  .side-cta{background:linear-gradient(160deg,rgba(31,209,165,.16),rgba(14,24,40,.95));}
  .stat-strip{background:#0A1120;}
  .mobile-drawer{background:rgba(8,13,24,.98);backdrop-filter:none;}
  .header-left,.header-right{gap:16px;}
  .menu-toggle{display:inline-flex;}
  .nav-links{display:none;}
  .header-right .btn-primary{display:none;}
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .sidebar{position:static;}
  .section{padding:64px 0;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .page-hero h1{font-size:28px;line-height:36px;}
  .section-head h2{font-size:24px;line-height:32px;}
  .cta-band h2{font-size:22px;line-height:32px;}
  .list-item{grid-template-columns:minmax(0,1fr);}
  .item-thumb{aspect-ratio:16/9;}
  .page-banner{aspect-ratio:16/9;}
  .banner-caption{left:18px;right:18px;bottom:16px;font-size:14px;line-height:24px;}
  .cta-band{padding:32px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;}
}
@media (max-width:639px){
  .container{padding:0 16px;}
  .page-hero{padding:96px 0 32px;}
  .section{padding:48px 0;}
  .hero-meta{gap:20px;}
  .stat-strip{grid-template-columns:minmax(0,1fr);gap:16px;padding:22px;}
  .flow{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .search-inner{flex-wrap:wrap;padding:12px 16px;}
  .to-top{right:16px;bottom:16px;}
  .side-card,.side-cta{padding:20px;}
}

/* roulang page: article */
:root{
  --bg-0:#060A12;
  --bg-1:#0A1120;
  --bg-2:#0F1A2C;
  --glass:rgba(150,200,255,0.06);
  --stroke:rgba(140,190,255,0.14);
  --line:rgba(255,255,255,0.08);
  --brand:#1FD1A5;
  --brand-2:#4DE8C2;
  --brand-deep:#12A98B;
  --accent:#FFB020;
  --alert:#FF5A5F;
  --text:#E8F1FF;
  --text-2:#9DB0C9;
  --text-3:#66788F;
  --on-brand:#04140F;
  --glow:0 0 0 1px rgba(31,209,165,.35), 0 8px 28px rgba(31,209,165,.22);
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --r-lg:16px;
  --r-md:12px;
  --r-pill:999px;
  --gutter:24px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(1100px 620px at 12% -8%, rgba(31,209,165,.075), transparent 62%),
    radial-gradient(920px 540px at 96% 92%, rgba(255,176,32,.055), transparent 60%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--brand-2)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.num,.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--gutter);position:relative;z-index:1}
.section{padding:88px 0}
.section-index{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--brand);opacity:.78;margin-bottom:10px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.section-head h2{font-size:30px;line-height:1.32;font-weight:700;letter-spacing:.01em;margin:0 0 8px}
.section-head p{margin:0;color:var(--text-2);font-size:15px;max-width:560px;line-height:1.7}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:700;line-height:1;white-space:nowrap;transition:transform .2s ease,box-shadow .25s ease,background-color .2s ease,border-color .2s ease,color .2s ease,filter .2s ease}
.btn-primary{background:linear-gradient(135deg,#1FD1A5,#12A98B);color:var(--on-brand);box-shadow:var(--glow)}
.btn-primary:hover{color:var(--on-brand);filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,209,165,.5),0 12px 34px rgba(31,209,165,.3)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 10px rgba(0,0,0,.35)}
.btn-ghost{background:var(--glass);border:1px solid var(--stroke);color:var(--brand-2)}
.btn-ghost:hover{background:rgba(31,209,165,.12);border-color:rgba(31,209,165,.45);color:var(--brand-2);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-2)}
.text-link .arrow{transition:transform .2s ease}
.text-link:hover .arrow{transform:translateX(4px)}

/* 徽章 */
.badge{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;letter-spacing:.02em;background:rgba(31,209,165,.14);color:var(--brand-2);white-space:nowrap}
.badge-accent{background:rgba(255,176,32,.14);color:var(--accent)}
.badge-neutral{background:rgba(255,255,255,.07);color:var(--text-2)}

/* 卡片 */
.card{background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-lg);color:var(--text);padding:0;box-shadow:none;backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background-color .25s ease}
.card:hover{border-color:rgba(31,209,165,.4);transform:translateY(-2px);box-shadow:var(--shadow-card);color:var(--text)}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:80;background:transparent;transition:background-color .3s ease}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line);opacity:0;transition:opacity .3s ease}
.site-header.is-scrolled{background:rgba(6,10,18,.88);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%)}
.site-header.is-scrolled::after{opacity:1}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.nav-content{display:flex;align-items:center;gap:36px;min-width:0}
.nav-visual{display:flex;align-items:center;gap:12px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text);white-space:nowrap}
.brand:hover{color:var(--text)}
.brand-mark{width:24px;height:24px;flex:0 0 24px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;display:inline-block;padding:6px 0;font-size:14px;font-weight:600;color:var(--text-2)}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand-2);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-links a:hover{color:var(--brand-2)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{transform:scaleX(1);background:var(--brand)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--stroke);background:var(--glass);color:var(--text-2);transition:color .2s ease,border-color .2s ease,background-color .2s ease}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(31,209,165,.45);background:rgba(31,209,165,.1)}
.hamburger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--stroke);background:var(--glass);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:background-color .2s ease}
.hamburger:hover span{background:var(--brand-2)}
.search-bar{position:absolute;left:0;right:0;top:100%;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(6,10,18,.96);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.search-inner{display:flex;align-items:center;gap:12px}
.search-inner input{flex:1;height:46px;padding:0 16px;border-radius:10px;border:1px solid var(--stroke);background:rgba(255,255,255,.04);color:var(--text);font-size:15px}
.search-inner input::placeholder{color:var(--text-3)}
.search-inner input:focus{outline:none;border-color:rgba(31,209,165,.55);box-shadow:0 0 0 3px rgba(31,209,165,.15)}

/* 移动抽屉 */
.drawer{position:fixed;inset:0;z-index:120;display:none}
.drawer.is-open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(3,6,12,.72)}
.drawer-panel{position:absolute;top:0;right:0;width:min(340px,86vw);height:100%;padding:20px;display:flex;flex-direction:column;gap:20px;background:rgba(10,17,32,.97);border-left:1px solid var(--stroke);animation:drawerIn .25s ease}
@keyframes drawerIn{from{transform:translateX(100%)}to{transform:translateX(0)}}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-title{font-size:15px;font-weight:700;color:var(--text)}
.drawer-links{display:flex;flex-direction:column;flex:1}
.drawer-links a{display:flex;align-items:center;height:52px;border-bottom:1px solid var(--line);font-size:16px;color:var(--text-2)}
.drawer-links a:hover{color:var(--brand-2)}
.drawer-links a.active{color:var(--brand-2)}

/* 面包屑 */
.breadcrumb{margin-bottom:22px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px;min-width:0}
.breadcrumb li+li::before{content:"/";color:var(--text-3);opacity:.6}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb li[aria-current] span{display:inline-block;max-width:440px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;color:var(--text-3)}

/* 文章头部 */
.article-hero{padding:52px 0 26px}
.article-title{font-size:38px;line-height:1.32;font-weight:700;letter-spacing:.01em;margin:0 0 18px;max-width:920px;word-break:break-word}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13.5px;color:var(--text-3)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .meta-item b{font-weight:600;color:var(--text-2)}
.article-cover{max-width:1000px;margin:26px auto 0;border-radius:18px;overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow-card)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* 文章主体 */
.article-section{padding:44px 0 76px}
.article-grid{margin:0 !important}
.article-grid>.cell{padding-left:14px;padding-right:14px}
.article-main{min-width:0}
.article-body{max-width:760px;font-size:17px;line-height:1.85;color:var(--text);word-break:break-word}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 20px;color:var(--text)}
.article-body h2{font-size:24px;line-height:1.42;font-weight:700;margin:42px 0 16px;padding-left:14px;border-left:3px solid var(--brand);scroll-margin-top:96px}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;margin:30px 0 12px;scroll-margin-top:96px}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li{margin-bottom:10px}
.article-body blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;background:var(--glass);color:var(--text-2)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:-8px}
.article-body a{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px}
.article-body strong{color:#fff}
.article-body code{padding:2px 6px;border-radius:6px;background:rgba(255,255,255,.06);font-family:var(--mono);font-size:14px;color:var(--brand-2)}
.article-body pre{padding:16px 18px;border-radius:var(--r-md);border:1px solid var(--stroke);background:rgba(6,10,18,.7);overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7}
.article-body pre code{background:none;padding:0;color:var(--text)}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px}
.article-body th,.article-body td{padding:12px 14px;border:1px solid var(--line);text-align:left}
.article-body th{background:rgba(255,255,255,.04);color:var(--text);font-weight:600}
.article-body td{color:var(--text-2)}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}

/* 标签与翻页 */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.tag-row .tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);border:1px solid var(--stroke);background:var(--glass);font-size:13px;color:var(--text-2)}
.tag-row .tag:hover{color:var(--brand-2);border-color:rgba(31,209,165,.45)}
.pager-cards{max-width:760px;margin:32px 0 0 !important}
.pager-cards>.cell{display:flex}
.pager-card{display:flex;flex-direction:column;justify-content:center;width:100%;padding:18px 20px;border-radius:var(--r-md);border:1px solid var(--stroke);background:var(--glass);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.pager-card:hover{border-color:rgba(31,209,165,.4);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.pager-label{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--text-3);margin-bottom:8px}
.pager-card h4{margin:0;font-size:15px;font-weight:600;line-height:1.6;color:var(--text)}
.back-links{display:flex;flex-wrap:wrap;gap:16px;max-width:760px;margin-top:28px;font-size:14px;color:var(--text-2)}
.back-links a{display:inline-flex;align-items:center;gap:6px;color:var(--text-2)}
.back-links a:hover{color:var(--brand-2)}

/* 空态 */
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;max-width:760px;padding:56px 24px;border:1px dashed var(--stroke);border-radius:var(--r-lg);background:var(--glass);text-align:center}
.empty-state p{color:var(--text-2);font-size:15px}

/* 侧栏 */
.article-aside{position:relative}
.sidebar-inner{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.sidebar-card{padding:20px;border-radius:var(--r-lg);border:1px solid var(--stroke);background:var(--glass);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%)}
.sidebar-card h4{margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--text-2);font-family:var(--mono)}
.sidebar-card>p{margin:0 0 14px;font-size:14px;line-height:1.75;color:var(--text-2)}
.toc-list{display:flex;flex-direction:column;border-left:1px solid var(--line)}
.toc-list a{display:block;padding:8px 12px;margin-left:-1px;border-left:2px solid transparent;font-size:14px;line-height:1.55;color:var(--text-2)}
.toc-list a:hover{color:var(--brand-2);border-left-color:rgba(31,209,165,.5);background:rgba(31,209,165,.07)}
.toc-list a.is-active{color:var(--brand-2);border-left-color:var(--brand);background:rgba(31,209,165,.09)}
.toc-list a.level-3{padding-left:26px;font-size:13px}
.toc-empty{font-size:13px;color:var(--text-3);margin:0}
.side-links{display:flex;flex-direction:column;gap:8px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:10px;border:1px solid transparent;font-size:14px;color:var(--text-2)}
.side-links a:hover{border-color:var(--stroke);background:rgba(255,255,255,.04);color:var(--brand-2)}
.mini-form{display:flex;flex-direction:column;gap:10px}
.mini-form input{height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--stroke);background:rgba(255,255,255,.04);color:var(--text);font-size:14px}
.mini-form input::placeholder{color:var(--text-3)}
.mini-form input:focus{outline:none;border-color:rgba(31,209,165,.55);box-shadow:0 0 0 3px rgba(31,209,165,.15)}
.form-tip{font-size:13px;color:var(--brand-2);min-height:18px;margin:0}

/* 相关阅读 */
.related-section{padding-top:20px}
.news-grid>.cell{display:flex}
.news-card{display:flex;flex-direction:column;width:100%;overflow:hidden}
.thumb{overflow:hidden;background:var(--bg-2)}
.ratio-16-10{aspect-ratio:16/10}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .thumb img{transform:scale(1.04)}
.news-card-body{display:flex;flex-direction:column;gap:12px;flex:1;padding:20px}
.news-card-body h3{margin:0;font-size:17px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-body p{margin:0;font-size:14px;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3)}

/* 底部 CTA */
.cta-band{position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(15,26,44,.92),rgba(10,17,32,.92))}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(620px 320px at 12% 18%,rgba(31,209,165,.16),transparent 62%),radial-gradient(520px 280px at 88% 92%,rgba(255,176,32,.12),transparent 62%)}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;padding:58px 0}
.cta-copy h2{margin:0 0 10px;font-size:28px;line-height:1.35;font-weight:700}
.cta-copy p{margin:0;font-size:15px;color:var(--text-2)}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{margin-top:0;padding:64px 0 24px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(6,10,18,0),rgba(6,10,18,.9))}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{max-width:330px;margin:0 0 8px;font-size:14px;line-height:1.85;color:var(--text-2)}
.site-footer h5{margin:0 0 16px;font-size:14px;font-weight:600;letter-spacing:.04em;color:var(--text)}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul a{font-size:14px;color:var(--text-2)}
.site-footer ul a:hover{color:var(--brand-2)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:20px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3)}
.footer-bottom p{margin:0}

/* 返回顶部 */
.to-top{position:fixed;right:24px;bottom:24px;z-index:70;display:none;align-items:center;justify-content:center;width:46px;height:46px;border-radius:50%;border:1px solid var(--stroke);background:rgba(15,26,44,.88);color:var(--text-2);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .25s ease}
.to-top.is-visible{display:inline-flex}
.to-top:hover{color:var(--brand-2);border-color:rgba(31,209,165,.5);transform:translateY(-2px);box-shadow:var(--glow)}

@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .hamburger{display:inline-flex}
  .card,.sidebar-card{backdrop-filter:none;-webkit-backdrop-filter:none;background:#0E1828}
  .article-aside{display:none}
  .section{padding:64px 0}
  .article-title{font-size:32px}
  .article-hero{padding:40px 0 22px}
  .related-section{padding-top:12px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  :root{--gutter:16px}
  .section{padding:48px 0}
  .section-head{margin-bottom:24px}
  .section-head h2{font-size:24px}
  .article-title{font-size:28px;line-height:1.38}
  .article-hero{padding:28px 0 18px}
  .article-cover{border-radius:14px;margin-top:18px}
  .article-section{padding:32px 0 56px}
  .article-grid>.cell{padding-left:0;padding-right:0}
  .article-body{font-size:17px}
  .article-body h2{font-size:21px;margin-top:34px}
  .cta-inner{padding:42px 0}
  .cta-copy h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .to-top{right:16px;bottom:16px;width:44px;height:44px}
  .breadcrumb li[aria-current] span{max-width:200px}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --bg-0:#060A12;
  --bg-1:#0A1120;
  --bg-2:#0F1A2C;
  --glass:rgba(150,200,255,0.06);
  --glass-solid:#0E1828;
  --stroke:rgba(140,190,255,0.14);
  --line:rgba(255,255,255,0.08);
  --brand:#1FD1A5;
  --brand-2:#4DE8C2;
  --brand-deep:#12A98B;
  --accent:#FFB020;
  --alert:#FF5A5F;
  --text:#E8F1FF;
  --text-2:#9DB0C9;
  --text-3:#66788F;
  --on-brand:#04140F;
  --glow:0 0 0 1px rgba(31,209,165,.35), 0 8px 28px rgba(31,209,165,.22);
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --r-lg:16px;
  --r-md:12px;
  --r-pill:999px;
  --container:1200px;
  --font-cn:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 560px at 10% -12%, rgba(31,209,165,.08), transparent 62%),
    radial-gradient(880px 640px at 102% 82%, rgba(255,176,32,.06), transparent 62%),
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px) 0 0/100% 68px,
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px) 0 0/68px 100%;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:.01em;word-break:break-word}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(31,209,165,.32);color:#fff}

/* Foundation 覆盖 */
.grid-x{margin-left:0;margin-right:0}
.grid-x>.cell{padding-left:0;padding-right:0}
.grid-container{padding-left:0;padding-right:0}
body,button,input,select,textarea{font-family:var(--font-cn)}

/* ============ 容器与通用 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){:root{--container:1280px}}
.site-header,main,.site-footer{position:relative;z-index:1}

.section{padding:96px 0;position:relative}
.section--tight{padding:72px 0}
.section--alt{background:linear-gradient(180deg, rgba(15,26,44,.55), rgba(6,10,18,0));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

.section-head{max-width:760px;margin-bottom:44px}
.section-head .sec-num{
  display:inline-block;
  font-variant-numeric:tabular-nums;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--brand);
  opacity:.72;
  margin-bottom:10px;
  font-weight:700;
}
.section-head h2{font-size:30px;line-height:1.32;margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:15px;line-height:1.8;max-width:640px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head--center p{margin-left:auto;margin-right:auto}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 22px;
  border-radius:10px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform .2s ease, box-shadow .25s ease, background-color .25s ease, color .25s ease, border-color .25s ease, filter .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#1FD1A5,#12A98B);
  color:var(--on-brand);
  box-shadow:var(--glow);
}
.btn-primary:hover{
  color:var(--on-brand);
  filter:brightness(1.06);
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(31,209,165,.5), 0 14px 38px rgba(31,209,165,.3);
}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 10px rgba(0,0,0,.4)}
.btn-ghost{
  background:rgba(150,200,255,.05);
  border-color:var(--stroke);
  color:var(--brand-2);
}
.btn-ghost:hover{
  background:rgba(31,209,165,.12);
  border-color:rgba(31,209,165,.42);
  color:var(--brand-2);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(0);background:rgba(31,209,165,.18)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;border-radius:9px}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-2);
}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(4px)}
.link-arrow:hover{color:var(--brand)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  background:rgba(31,209,165,.14);
  color:var(--brand-2);
  border:1px solid rgba(31,209,165,.26);
  white-space:nowrap;
}
.badge--accent{background:rgba(255,176,32,.14);color:var(--accent);border-color:rgba(255,176,32,.3)}
.badge--muted{background:rgba(157,176,201,.12);color:var(--text-2);border-color:var(--stroke)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.82);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line);
}
.grid-x.nav-grid{
  display:flex;
  flex-wrap:nowrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
}
.grid-x.nav-grid>.cell{width:auto;flex:0 0 auto}
.nav-content{display:flex;align-items:center;gap:34px;flex:1 1 auto;min-width:0}
.nav-visual{display:flex;align-items:center;gap:10px;justify-content:flex-end;flex:0 0 auto}

.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand:hover{color:var(--text)}
.brand-mark{width:24px;height:24px;flex:0 0 auto}
.site-footer .brand{font-size:16px}

.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14px;
  font-weight:600;
  color:var(--text-2);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--brand-2);
  border-radius:2px;
  transition:width .2s ease, background-color .2s ease;
}
.nav-links a:hover{color:var(--brand-2)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{width:100%;height:3px;background:var(--brand)}

.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid var(--stroke);
  background:rgba(150,200,255,.05);
  color:var(--text-2);
  transition:color .2s ease, border-color .2s ease, background-color .2s ease;
}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(31,209,165,.4);background:rgba(31,209,165,.1)}

.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;border-radius:10px;border:1px solid var(--stroke);background:rgba(150,200,255,.05)}
.hamburger span{display:block;width:18px;height:2px;margin:0 auto;background:var(--text-2);border-radius:2px;transition:background-color .2s}
.hamburger:hover span{background:var(--brand-2)}

/* 搜索条 */
.search-panel{
  display:none;
  position:absolute;
  left:0;right:0;top:100%;
  background:rgba(10,17,32,.96);
  border-bottom:1px solid var(--line);
  padding:18px 0;
}
.search-panel.is-open{display:block}
.search-inner{display:flex;align-items:center;gap:12px}
.search-inner input{
  flex:1 1 auto;
  min-height:48px;
  padding:0 16px;
  border-radius:10px;
  border:1px solid var(--stroke);
  background:rgba(6,10,18,.7);
  color:var(--text);
  font-size:15px;
}
.search-inner input::placeholder{color:var(--text-3)}
.search-inner input:focus{border-color:rgba(31,209,165,.5);outline:none;box-shadow:0 0 0 3px rgba(31,209,165,.14)}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(6,10,18,.96);
  backdrop-filter:blur(14px) saturate(120%);
  transform:translateY(-100%);
  transition:transform .25s ease;
  display:flex;
  flex-direction:column;
  padding:20px 24px 32px;
  visibility:hidden;
}
.mobile-drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;min-height:40px;margin-bottom:14px}
.drawer-nav{display:flex;flex-direction:column;margin-bottom:auto}
.drawer-nav a{
  display:flex;
  align-items:center;
  min-height:52px;
  font-size:16px;
  font-weight:600;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-2)}
.drawer-cta{display:flex;flex-direction:column;gap:12px;margin-top:24px}
.drawer-cta .btn{width:100%}

/* ============ Hero ============ */
.hero{padding:70px 0 84px;position:relative;overflow:hidden}
.hero::after{
  content:"";
  position:absolute;
  right:-140px;top:-120px;
  width:560px;height:560px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(31,209,165,.10), transparent 68%);
  pointer-events:none;
}
.breadcrumb{margin-bottom:26px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--text-3);opacity:.6}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb [aria-current="page"]{color:var(--brand-2)}

.grid-x.hero-grid{display:flex;flex-wrap:wrap;gap:32px}
@media (min-width:1024px){
  .grid-x.hero-grid{flex-wrap:nowrap;gap:56px;align-items:flex-start}
  .grid-x.hero-grid>.hero-copy{flex:7 1 0;width:auto;min-width:0}
  .grid-x.hero-grid>.hero-panel{flex:5 1 0;width:auto;min-width:0}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(31,209,165,.12);
  border:1px solid rgba(31,209,165,.28);
  color:var(--brand-2);
  font-size:12px;font-weight:600;letter-spacing:.1em;
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.2;
  margin-bottom:18px;
}
.hero-sub{
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:620px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}

.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  padding-top:24px;
  border-top:1px solid var(--line);
  max-width:560px;
}
.metric-num{
  display:block;
  font-size:26px;
  font-weight:700;
  color:var(--text);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
  line-height:1.2;
}
.metric-label{display:block;font-size:13px;color:var(--text-3);margin-top:4px}

.hero-panel{display:flex;flex-direction:column;gap:18px}
.filter-panel{
  background:var(--glass);
  border:1px solid var(--stroke);
  border-radius:var(--r-lg);
  padding:22px;
  backdrop-filter:blur(14px) saturate(120%);
}
.filter-title{margin:0 0 14px;font-size:13px;color:var(--text-3);letter-spacing:.1em}
.pill-group{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.pill{
  height:36px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--stroke);
  background:rgba(150,200,255,.04);
  color:var(--text-2);
  font-size:14px;
  font-weight:600;
  transition:color .2s ease, border-color .2s ease, background-color .2s ease, transform .2s ease;
}
.pill:hover{color:var(--brand-2);border-color:rgba(31,209,165,.4);transform:translateY(-1px)}
.pill.is-active{
  color:var(--brand-2);
  border-color:rgba(31,209,165,.62);
  background:rgba(31,209,165,.14);
  box-shadow:0 0 0 1px rgba(31,209,165,.28);
}
.filter-note{margin:0;font-size:13px;line-height:1.7;color:var(--text-3)}

.hero-visual{
  position:relative;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--stroke);
  box-shadow:0 18px 44px rgba(0,0,0,.5), 0 0 34px rgba(31,209,165,.08);
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(160deg, rgba(31,209,165,.14), rgba(255,176,32,.06) 55%, transparent 85%);
  pointer-events:none;
}

/* ============ 矩阵卡 ============ */
.matrix{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  align-items:start;
}
.matrix-card{
  background:var(--glass);
  border:1px solid var(--stroke);
  border-radius:var(--r-lg);
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.matrix-card:hover{
  transform:translateY(-2px);
  border-color:rgba(31,209,165,.4);
  box-shadow:var(--shadow-card);
}
.mc-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--bg-2)}
.matrix-card--tall .mc-media{aspect-ratio:4/3}
.mc-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.matrix-card:hover .mc-media img{transform:scale(1.04)}
.mc-badge{
  position:absolute;left:14px;top:14px;
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:rgba(6,10,18,.72);
  border:1px solid rgba(31,209,165,.36);
  color:var(--brand-2);
  backdrop-filter:blur(6px);
}
.mc-body{padding:22px 24px 24px}
.mc-body h3{font-size:19px;line-height:1.4;margin-bottom:10px}
.mc-body p{font-size:15px;line-height:1.8;color:var(--text-2);margin-bottom:16px}
.mc-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.mc-meta .num{font-variant-numeric:tabular-nums;color:var(--text);font-weight:600;letter-spacing:-.01em}

/* ============ 数据条 ============ */
.stat-band{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(100deg, rgba(31,209,165,.07), rgba(255,176,32,.045) 60%, rgba(31,209,165,.05));
  padding:44px 0;
}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;text-align:center}
.stat-num{
  display:block;
  font-size:clamp(26px,3.4vw,36px);
  font-weight:700;
  color:var(--text);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
  line-height:1.15;
}
.stat-num em{font-style:normal;font-size:.6em;color:var(--brand);margin-left:2px}
.stat p{margin:8px 0 0;font-size:13px;color:var(--text-3);letter-spacing:.04em}
.stat+.stat{border-left:1px solid var(--line)}

/* ============ 流程 ============ */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  position:relative;
}
.flow::before{
  content:"";
  position:absolute;
  left:4%;right:4%;top:26px;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--stroke) 8%, var(--stroke) 92%, transparent);
}
.flow-item{position:relative;padding-top:64px}
.flow-num{
  position:absolute;top:0;left:0;
  width:52px;height:52px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--bg-1);
  border:1px solid var(--stroke);
  color:var(--brand);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.flow-item h3{font-size:17px;margin-bottom:8px}
.flow-item p{font-size:14px;line-height:1.8;color:var(--text-2)}

/* ============ 场景分屏 ============ */
.grid-x.scene-split{display:flex;flex-wrap:wrap;gap:32px;align-items:center}
@media (min-width:1024px){
  .grid-x.scene-split{flex-wrap:nowrap;gap:56px}
  .grid-x.scene-split>.scene-media{flex:1 1 0;width:auto;min-width:0}
  .grid-x.scene-split>.scene-copy{flex:1 1 0;width:auto;min-width:0}
}
.scene-media{
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-card);
}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.scene-copy h2{font-size:30px;line-height:1.32;margin:10px 0 14px}
.scene-copy>p{color:var(--text-2);font-size:15px;line-height:1.85;margin-bottom:20px}

.check-list{display:flex;flex-direction:column;gap:14px;margin-bottom:26px}
.check-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.check-list li svg{flex:0 0 auto;margin-top:6px}
.check-list strong{color:var(--text);font-weight:600}

/* ============ FAQ ============ */
.faq-list{max-width:820px;margin:0 auto;border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  position:relative;
  list-style:none;
  cursor:pointer;
  padding:20px 48px 20px 0;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  transition:color .2s ease;
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:hover{color:var(--brand-2)}
.faq-list summary::after{
  content:"+";
  position:absolute;
  right:10px;top:50%;
  transform:translateY(-50%);
  font-size:20px;
  line-height:1;
  color:var(--brand);
  transition:transform .25s ease;
}
.faq-list details[open] summary::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq-body{
  padding:0 44px 22px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  animation:faqIn .25s ease;
}
@keyframes faqIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  margin:0 auto;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(120deg, rgba(31,209,165,.10), rgba(10,17,32,.6) 46%, rgba(255,176,32,.07));
}
.cta-band::before{
  content:"";
  position:absolute;left:-120px;top:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle, rgba(31,209,165,.16), transparent 66%);
}
.cta-band::after{
  content:"";
  position:absolute;right:-140px;bottom:-200px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle, rgba(255,176,32,.12), transparent 66%);
}
.cta-inner{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:56px 24px;
}
.cta-inner h2{font-size:28px;line-height:1.34;margin-bottom:10px}
.cta-inner p{color:var(--text-2);font-size:15px;max-width:620px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:rgba(6,10,18,.72);
  padding:64px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--text-3);margin:16px 0 0;max-width:340px}
.site-footer h5{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul a{font-size:14px;color:var(--text-2)}
.site-footer ul a:hover{color:var(--brand-2)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  font-size:12px;
  color:var(--text-3);
}
.footer-bottom p{margin:0}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:70;
  width:46px;height:46px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(15,26,44,.9);
  border:1px solid var(--stroke);
  color:var(--brand-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease, visibility .25s ease, box-shadow .25s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:var(--glow);border-color:rgba(31,209,165,.5)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .grid-x>.cell{flex:0 0 auto;width:100%}
  .grid-x.nav-grid>.cell{width:auto}
  .nav-links{display:none}
  .hamburger{display:flex}
  .nav-cta{display:none}
  .section{padding:64px 0}
  .section-head h2{font-size:26px}
  .scene-copy h2{font-size:26px}
  .cta-inner h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .matrix{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow::before{display:none}
  .flow-item{padding-top:60px}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .stat+.stat{border-left:0}
  .stat:nth-child(even){border-left:1px solid var(--line)}
  .hero{padding:44px 0 64px}
  .filter-panel,.matrix-card,.icon-btn,.hamburger,.to-top,.search-inner input{
    backdrop-filter:none;
    -webkit-backdrop-filter:none;
  }
  .filter-panel,.matrix-card{background:var(--glass-solid)}
  .site-header.is-scrolled{backdrop-filter:none;background:rgba(6,10,18,.94)}
  .mobile-drawer{backdrop-filter:none;background:rgba(6,10,18,.98)}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .hero-metrics{grid-template-columns:1fr;gap:14px}
  .hero-metrics .metric{padding-bottom:12px;border-bottom:1px solid var(--line)}
  .hero-metrics .metric:last-child{border-bottom:0;padding-bottom:0}
  .flow{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr;gap:22px}
  .stat:nth-child(even){border-left:0}
  .stat{padding-bottom:18px;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0;padding-bottom:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-inner{padding:44px 16px}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .to-top{right:16px;bottom:16px}
  .mc-body{padding:18px}
  .section-head{margin-bottom:32px}
}