/* roulang page: index */
:root{
  --bg-0:#060A13;
  --bg-1:#0A1120;
  --brand:#4C6BFF;
  --brand-2:#2FD8C6;
  --accent:#FFB15C;
  --ink-0:#EAF0FF;
  --ink-1:#A9B6D0;
  --ink-2:#6E7C99;
  --line:rgba(140,180,255,.14);
  --line-strong:rgba(140,180,255,.30);
  --glass-a:rgba(255,255,255,.06);
  --glass-b:rgba(255,255,255,.025);
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-card:0 20px 60px -30px rgba(76,107,255,.35);
  --shadow-btn:0 0 0 1px rgba(47,216,198,.35),0 10px 30px -10px rgba(47,216,198,.5);
  --container:1200px;
  --ease:.25s ease;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","Space Grotesk","SFMono-Regular",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:118px;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-0);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.01em;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.grid-container{max-width:var(--container);padding-left:24px;padding-right:24px;}
.glass{
  background-image:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
}
.section{padding:104px 0;border-bottom:1px solid var(--line);position:relative;}
.section-alt{background:var(--bg-1);}
.sec-head{max-width:720px;margin-bottom:52px;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-2);margin-bottom:16px;
}
.sec-kicker::before{content:"";width:22px;height:1px;background:var(--brand-2);}
.sec-head h2{font-size:36px;margin-bottom:16px;}
.sec-head p{color:var(--ink-1);font-size:16.5px;}
.sec-index{
  font-family:var(--font-num);font-size:13px;letter-spacing:.2em;color:var(--brand-2);
  display:block;margin-bottom:16px;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:46px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:0;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease),filter var(--ease);
}
.btn i{font-size:14px;}
.btn-primary{
  background:linear-gradient(90deg,var(--brand-2),var(--brand));
  color:#05121A;box-shadow:var(--shadow-btn);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,216,198,.45),0 16px 40px -12px rgba(47,216,198,.62);}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 10px rgba(0,0,0,.28);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink-0);}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(47,216,198,.42);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;}

.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-1);line-height:1.4;
}
.badge i{color:var(--brand-2);font-size:12px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand-2);
  font-size:14.5px;font-weight:600;transition:gap var(--ease),color var(--ease);
}
.link-arrow:hover{gap:12px;color:#6ff0e0;}

/* 导航 */
.site-header{position:sticky;top:0;z-index:70;padding:14px 24px 0;transition:padding .3s ease;}
.nav-panel{
  max-width:var(--container);margin:0 auto;
  display:flex;align-items:center;gap:20px;
  padding:12px 16px;border-radius:var(--radius-lg);
  background-color:rgba(6,10,19,.55);
  background-image:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.028));
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 18px 50px -34px rgba(0,0,0,.9);
  transition:padding .3s ease,background-color .3s ease,border-color .3s ease;
}
.site-header.is-compact{padding-top:8px;}
.site-header.is-compact .nav-panel{padding-top:7px;padding-bottom:7px;background-color:rgba(6,10,19,.88);border-color:var(--line-strong);}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(47,216,198,.24),rgba(76,107,255,.30));
  border:1px solid rgba(47,216,198,.38);color:var(--brand-2);font-size:16px;
  box-shadow:0 0 20px -6px rgba(47,216,198,.6);flex:0 0 auto;
}
.brand-text{font-size:16px;font-weight:700;white-space:nowrap;}
.nav-cards{
  display:flex;align-items:stretch;margin-left:auto;
  border:1px solid var(--line);border-radius:var(--radius-sm);
  overflow:hidden;background:rgba(255,255,255,.02);
}
.nav-card{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  font-size:14px;color:var(--ink-1);white-space:nowrap;
  border-right:1px solid var(--line);
  transition:color var(--ease),background var(--ease);
}
.nav-card:last-child{border-right:none;}
.nav-card i{font-size:15px;color:var(--ink-2);transition:color var(--ease);}
.nav-card:hover{color:var(--ink-0);background:rgba(255,255,255,.05);}
.nav-card:hover i{color:var(--brand-2);}
.nav-card.is-active{color:var(--brand-2);background:rgba(47,216,198,.08);}
.nav-card.is-active i{color:var(--brand-2);}
.nav-cta{flex:0 0 auto;height:42px;padding:0 20px;font-size:14.5px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--ink-0);font-size:16px;cursor:pointer;
}
.drawer{
  position:fixed;inset:0;z-index:90;padding:22px 20px 26px;
  background:rgba(6,10,19,.97);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  transform:translateY(-100%);transition:transform .35s ease;
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateY(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:42px;height:42px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--ink-0);font-size:16px;cursor:pointer;
}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.drawer-card{
  display:flex;flex-direction:column;gap:10px;padding:16px 14px;
  border:1px solid var(--line);border-radius:var(--radius-md);
  background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  font-size:14.5px;color:var(--ink-1);
}
.drawer-card i{font-size:18px;color:var(--brand-2);}
.drawer-card.is-active{border-color:rgba(47,216,198,.5);color:var(--ink-0);background:rgba(47,216,198,.08);}
.drawer-foot{margin-top:auto;padding-top:22px;}

/* 首屏 */
.hero{position:relative;overflow:hidden;padding:92px 0 104px;border-bottom:1px solid var(--line);}
.hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-1.webp");background-size:cover;background-position:center;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,19,.72),rgba(6,10,19,.88));}
.hero-beam{
  position:absolute;top:-35%;left:-12%;width:72%;height:170%;z-index:1;pointer-events:none;
  background:linear-gradient(115deg,rgba(47,216,198,.18),rgba(76,107,255,.09) 45%,transparent 72%);
  transform:rotate(-8deg);filter:blur(12px);
}
.hero-grid-lines{
  position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.6;
  background-image:linear-gradient(rgba(140,180,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(140,180,255,.055) 1px,transparent 1px);
  background-size:68px 68px;
}
.hero .grid-container{position:relative;z-index:3;}
.hero-copy h1{font-size:52px;margin:20px 0 22px;letter-spacing:-.015em;}
.hero-sub{color:var(--ink-1);font-size:17px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:34px 0 40px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;}
.hero-stat{display:flex;align-items:center;gap:11px;}
.hero-stat i{color:var(--brand-2);font-size:15px;}
.hero-stat b{font-family:var(--font-num);font-size:19px;font-weight:600;color:var(--ink-0);}
.hero-stat span{font-size:13.5px;color:var(--ink-2);}
.hero-card-wrap{display:flex;justify-content:flex-end;}
.hero-card{
  width:100%;max-width:520px;border-radius:var(--radius-lg);padding:22px;
  box-shadow:var(--shadow-card);
}
.hero-card-img{border-radius:var(--radius-md);overflow:hidden;aspect-ratio:16/10;background:rgba(255,255,255,.04);}
.hero-card-img img{width:100%;height:100%;object-fit:cover;}
.hero-card h2{font-size:17px;font-weight:600;margin:20px 0 14px;}
.hero-cap{display:flex;align-items:flex-start;gap:11px;padding:9px 0;font-size:14.5px;color:var(--ink-1);}
.hero-cap i{color:var(--brand-2);font-size:13px;margin-top:6px;}
.hero-card-bar{height:3px;border-radius:3px;background:rgba(255,255,255,.08);margin-top:20px;overflow:hidden;}
.hero-card-bar span{display:block;height:100%;width:74%;border-radius:3px;background:linear-gradient(90deg,var(--brand-2),rgba(47,216,198,0));}

/* 卖点 */
.selling-head{position:sticky;top:126px;}
.selling-head h2{font-size:36px;margin-bottom:18px;}
.selling-head p{color:var(--ink-1);margin-bottom:26px;}
.stack-list{display:flex;flex-direction:column;}
.stack-card{
  position:relative;display:flex;gap:20px;padding:24px 26px;
  border:1px solid var(--line);border-radius:var(--radius-md);
  background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.stack-card + .stack-card{margin-top:8px;}
.stack-card::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--brand-2);opacity:0;transition:opacity var(--ease);
}
.stack-card:hover{transform:translateX(4px);border-color:var(--line-strong);box-shadow:var(--shadow-card);}
.stack-card:hover::before{opacity:1;}
.stack-num{font-family:var(--font-num);font-size:13px;color:var(--ink-2);letter-spacing:.12em;padding-top:5px;flex:0 0 auto;}
.stack-card h3{font-size:20px;margin-bottom:8px;font-weight:600;}
.stack-card p{color:var(--ink-1);font-size:15px;}

/* 演示 */
.demo-frame{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line-strong);aspect-ratio:16/9;background:rgba(255,255,255,.03);
  box-shadow:var(--shadow-card);
}
.demo-frame img{width:100%;height:100%;object-fit:cover;}
.frame-tag{
  position:absolute;left:16px;top:16px;padding:6px 14px;border-radius:8px;
  background:rgba(6,10,19,.62);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  font-size:12px;color:var(--ink-0);
}
.demo-tabs{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.demo-tab{
  padding:11px 20px;border-radius:var(--radius-sm);cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  color:var(--ink-1);font-size:14.5px;transition:all var(--ease);
}
.demo-tab:hover{color:var(--ink-0);border-color:var(--line-strong);}
.demo-tab.is-active{color:var(--brand-2);border-color:rgba(47,216,198,.55);background:rgba(47,216,198,.08);box-shadow:0 0 24px -10px rgba(47,216,198,.9);}
.demo-panel{display:none;}
.demo-panel.is-active{display:block;}
.demo-panel h3{font-size:22px;margin-bottom:16px;font-weight:600;}
.demo-panel ul li{display:flex;gap:12px;padding:10px 0;color:var(--ink-1);font-size:15px;border-bottom:1px dashed var(--line);}
.demo-panel ul li:last-child{border-bottom:none;}
.demo-panel ul li i{color:var(--brand-2);font-size:13px;margin-top:7px;}

/* 证据 */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  border-radius:var(--radius-lg);overflow:hidden;margin-bottom:52px;
}
.stat-item{
  padding:28px 24px;background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  border-left:1px solid var(--line);
}
.stat-item:first-child{border-left:none;}
.stat-num{display:block;font-family:var(--font-num);font-size:34px;font-weight:600;color:var(--accent);line-height:1.1;}
.stat-num em{font-style:normal;font-size:14px;color:var(--ink-1);margin-left:4px;}
.stat-label{display:block;margin-top:10px;font-size:13.5px;color:var(--ink-1);}
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:14px;scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none;}
.quote-card{
  flex:0 0 340px;scroll-snap-align:start;padding:26px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  transition:border-color var(--ease),transform var(--ease);
}
.quote-card:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.quote-top{display:flex;align-items:center;gap:14px;margin-bottom:18px;}
.avatar{
  width:42px;height:42px;border-radius:var(--radius-sm);display:grid;place-items:center;
  background:rgba(76,107,255,.18);border:1px solid rgba(76,107,255,.35);
  color:var(--brand);font-size:16px;flex:0 0 auto;
}
.quote-card p{color:var(--ink-1);font-size:15px;margin-bottom:18px;}
.quote-sign{padding-top:16px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-2);}
.quote-sign b{display:block;color:var(--ink-0);font-size:14.5px;font-weight:600;margin-bottom:2px;}
.rail-nav{display:flex;justify-content:flex-end;gap:10px;margin-top:8px;}
.rail-btn{
  width:42px;height:42px;border-radius:var(--radius-sm);cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--ink-1);
  transition:all var(--ease);
}
.rail-btn:hover{color:var(--brand-2);border-color:rgba(47,216,198,.45);}
.rail-dots{display:none;justify-content:center;gap:8px;margin-top:16px;}
.rail-dots span{width:7px;height:7px;border-radius:50%;background:var(--line-strong);}
.rail-dots span.is-active{background:var(--brand-2);}

/* 最新信息 */
.news-card{
  display:flex;flex-direction:column;height:100%;
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card);}
.news-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:rgba(255,255,255,.04);}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-badge{
  position:absolute;left:14px;top:14px;padding:5px 12px;border-radius:8px;
  font-size:12px;color:var(--ink-0);
  background:rgba(6,10,19,.66);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.news-body{padding:22px 24px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-body h3{
  font-size:18px;font-weight:600;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  color:var(--ink-1);font-size:14.5px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);font-size:13px;color:var(--ink-2);
}
.news-more{display:inline-flex;align-items:center;gap:7px;color:var(--brand-2);transition:gap var(--ease);}
.news-card:hover .news-more{gap:11px;}
.news-cell{margin-bottom:24px;}
.empty-state{
  padding:64px 30px;border-radius:var(--radius-lg);text-align:center;
  border:1px solid var(--line);background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
}
.empty-state i{font-size:34px;color:var(--ink-2);margin-bottom:18px;display:block;}
.empty-state p{color:var(--ink-1);margin-bottom:24px;}
.news-foot{display:flex;justify-content:center;margin-top:22px;}

/* 价格 */
.price-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch;}
.price-card{
  display:flex;flex-direction:column;padding:34px 32px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:linear-gradient(180deg,var(--glass-a),var(--glass-b));
  position:relative;transition:transform var(--ease),border-color var(--ease);
}
.price-card:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.price-card.is-featured{
  border-color:rgba(47,216,198,.55);padding:40px 34px;
  box-shadow:0 0 0 1px rgba(47,216,198,.22),0 26px 70px -34px rgba(47,216,198,.55);
}
.price-flag{
  position:absolute;top:-13px;left:32px;padding:5px 15px;border-radius:var(--radius-pill);
  background:linear-gradient(90deg,var(--brand-2),var(--brand));color:#05121A;
  font-size:12.5px;font-weight:700;
}
.price-card h3{font-size:22px;font-weight:600;margin-bottom:10px;}
.price-desc{color:var(--ink-1);font-size:14.5px;margin-bottom:26px;}
.price-num{font-family:var(--font-num);font-size:46px;font-weight:600;color:var(--accent);line-height:1;margin-bottom:8px;}
.price-num em{font-style:normal;font-size:14px;color:var(--ink-2);margin-left:6px;font-family:var(--font-sans);}
.price-list{margin:26px 0 32px;display:flex;flex-direction:column;gap:13px;flex:1 1 auto;}
.price-list li{display:flex;gap:11px;font-size:14.8px;color:var(--ink-1);}
.price-list i{color:var(--brand-2);font-size:13px;margin-top:7px;}

/* FAQ */
.faq-wrap{max-width:880px;margin:0 auto;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:600;color:var(--ink-0);
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\2b";font-family:var(--font-num);font-size:20px;line-height:1;
  color:var(--ink-2);flex:0 0 auto;transition:transform var(--ease),color var(--ease);
}
.faq-item summary:hover{color:var(--brand-2);}
.faq-item[open] summary{color:var(--brand-2);}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--brand-2);}
.faq-body{padding:0 20px 26px;color:var(--ink-1);font-size:15.5px;line-height:1.8;}

/* CTA 与表单 */
.cta-band{
  border-radius:var(--radius-lg);padding:52px 48px;
  border:1px solid var(--line);
  background-image:linear-gradient(120deg,rgba(47,216,198,.10),rgba(76,107,255,.12) 55%,rgba(255,255,255,.02));
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;
}
.cta-copy h2{font-size:34px;margin-bottom:16px;}
.cta-copy p{color:var(--ink-1);margin-bottom:26px;}
.cta-points li{display:flex;gap:11px;padding:8px 0;font-size:14.8px;color:var(--ink-1);}
.cta-points i{color:var(--brand-2);font-size:13px;margin-top:7px;}
.form-card{
  border-radius:var(--radius-lg);padding:28px;
  border:1px solid var(--line);background:rgba(6,10,19,.55);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;color:var(--ink-1);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;height:46px;padding:0 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  color:var(--ink-0);outline:none;transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-2);}
.field input:focus,.field textarea:focus{
  border-color:rgba(47,216,198,.7);box-shadow:0 0 0 2px rgba(47,216,198,.22);
  background:rgba(255,255,255,.06);
}
.form-note{margin-top:14px;font-size:12.5px;color:var(--ink-2);line-height:1.7;}

/* 页脚 */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line);
  padding:72px 0 34px;
}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px;}
.footer-brand span{font-size:16px;font-weight:700;}
.footer-desc{color:var(--ink-1);font-size:14.5px;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink-0);margin-bottom:18px;letter-spacing:.02em;}
.footer-col a{
  display:block;padding:6px 0;font-size:14.5px;color:var(--ink-1);
  transition:color var(--ease),transform var(--ease);
}
.footer-col a:hover{color:var(--brand-2);transform:translateX(2px);}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-size:12px;color:var(--ink-2);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:75;
  display:inline-flex;align-items:center;gap:10px;
  height:50px;padding:0 24px;border-radius:var(--radius-pill);
  background:linear-gradient(90deg,var(--brand-2),var(--brand));color:#05121A;
  font-size:14.8px;font-weight:600;
  box-shadow:var(--shadow-btn);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .35s ease,transform .35s ease,filter var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{filter:brightness(1.08);}
.float-cta i{font-size:14px;}

/* 进场 */
html.js-ready .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
html.js-ready .reveal.is-visible{opacity:1;transform:none;}

/* 断点 */
@media (max-width:1199px){
  .hero-copy h1{font-size:44px;}
  .sec-head h2,.selling-head h2,.cta-copy h2{font-size:30px;}
  .section{padding:84px 0;}
}
@media (max-width:959px){
  .nav-cards,.nav-cta{display:none;}
  .nav-toggle{display:grid;place-items:center;margin-left:auto;}
  .hero{padding:64px 0 78px;}
  .hero-copy h1{font-size:38px;}
  .hero-card-wrap{justify-content:flex-start;margin-top:40px;}
  .hero-card{max-width:100%;}
  .selling-head{position:static;margin-bottom:34px;}
  .stat-band{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(3){border-left:none;}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line);}
  .price-grid{grid-template-columns:1fr;}
  .price-card.is-featured{order:-1;}
  .cta-band{grid-template-columns:1fr;padding:38px 28px;gap:34px;}
  .section{padding:80px 0;}
  .sec-head h2,.selling-head h2,.cta-copy h2{font-size:28px;}
}
@media (max-width:639px){
  body{font-size:16px;line-height:1.8;}
  .site-header{padding:10px 16px 0;}
  .nav-panel{padding:10px 12px;gap:12px;}
  .brand-text{font-size:14.5px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .section{padding:64px 0;}
  .hero{padding:52px 0 66px;}
  .hero-copy h1{font-size:34px;}
  .hero-sub{font-size:15.5px;}
  .hero-stats{gap:20px;}
  .hero-card{padding:16px;}
  .stack-card{padding:18px 16px;gap:14px;}
  .stack-card h3{font-size:18px;}
  .demo-frame{border-radius:var(--radius-md);}
  .stat-item{padding:20px 16px;}
  .stat-num{font-size:26px;}
  .quote-card{flex:0 0 82%;padding:20px;}
  .rail-nav{display:none;}
  .rail-dots{display:flex;}
  .news-body{padding:18px 16px;}
  .price-card{padding:26px 20px;}
  .price-card.is-featured{padding:30px 22px;}
  .price-num{font-size:38px;}
  .faq-item summary{font-size:15.5px;padding:20px 2px;}
  .faq-body{padding:0 10px 22px;}
  .cta-band{padding:30px 20px;border-radius:var(--radius-md);}
  .form-card{padding:20px;}
  .sec-head h2,.selling-head h2,.cta-copy h2{font-size:26px;}
  .float-cta{
    left:0;right:0;bottom:0;height:auto;
    padding:15px 16px calc(15px + env(safe-area-inset-bottom));
    border-radius:0;justify-content:center;font-size:15px;
  }
  .site-footer{padding-bottom:96px;}
  .drawer-grid{grid-template-columns:1fr 1fr;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none!important;animation:none!important;}
  html.js-ready .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --bg-0:#060A13;
  --bg-1:#0A1120;
  --brand:#4C6BFF;
  --brand-2:#2FD8C6;
  --accent:#FFB15C;
  --ink-0:#EAF0FF;
  --ink-1:#A9B6D0;
  --ink-2:#6E7C99;
  --line:rgba(140,180,255,0.14);
  --line-strong:rgba(140,180,255,0.28);
  --glass:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.025));
  --glass-soft:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-card:0 20px 60px -30px rgba(76,107,255,.35);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35),0 10px 30px -10px rgba(47,216,198,.5);
  --space-section:104px;
  --font-cn:"Noto Sans SC","PingFang SC","HarmonyOS Sans",system-ui,sans-serif;
  --font-num:"Inter","Space Grotesk",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-0);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-lock{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-2);}
button{font-family:inherit;}
h1,h2,h3,h4{font-weight:700;letter-spacing:-0.01em;line-height:1.2;margin:0;}
p{margin:0 0 1.2em;}
ul{margin:0;padding:0;list-style:none;}
input,textarea,select{font-family:inherit;}
::selection{background:rgba(47,216,198,.3);}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;}
.section{padding:var(--space-section) 0;border-top:1px solid var(--line);}
.section-alt{background:var(--bg-1);}
.section-head{margin-bottom:44px;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand-2);letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;
  border:1px solid rgba(47,216,198,.28);
  background:rgba(47,216,198,.08);
  margin-bottom:16px;
}
.section-head h2{font-size:36px;margin-bottom:14px;}
.section-head p{color:var(--ink-1);font-size:16px;margin:0;}
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
}
/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .25s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(90deg,var(--brand-2),var(--brand));
  color:#05121A;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{color:#05121A;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,216,198,.5),0 16px 40px -12px rgba(47,216,198,.65);}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.25);}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:var(--ink-0);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(47,216,198,.45);color:var(--ink-0);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;}
/* ---------- 导航 ---------- */
.site-header{position:sticky;top:14px;z-index:60;padding:0 24px;}
.nav-panel{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:12px 18px;border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  box-shadow:0 24px 60px -40px rgba(0,0,0,.9);
  transition:padding .3s ease,background .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled .nav-panel{
  padding:8px 18px;
  background:linear-gradient(180deg,rgba(10,17,32,.92),rgba(10,17,32,.82));
  box-shadow:0 24px 60px -34px rgba(0,0,0,1),0 0 0 1px rgba(47,216,198,.06);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(47,216,198,.22),rgba(76,107,255,.28));
  border:1px solid rgba(47,216,198,.32);
  color:var(--brand-2);font-size:16px;
}
.brand-text{font-weight:700;font-size:16px;letter-spacing:.01em;white-space:nowrap;}
.nav-cards{display:flex;align-items:center;gap:0;margin-left:auto;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:rgba(255,255,255,.02);}
.nav-card{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;font-size:14px;color:var(--ink-1);
  border-right:1px solid var(--line);
  transition:background .22s ease,color .22s ease;
}
.nav-card:last-child{border-right:none;}
.nav-card i{font-size:14px;color:var(--ink-2);transition:color .22s ease;}
.nav-card:hover{background:rgba(255,255,255,.05);color:var(--ink-0);}
.nav-card:hover i{color:var(--brand-2);}
.nav-card.is-active{background:rgba(47,216,198,.08);color:var(--ink-0);box-shadow:inset 0 0 0 1px rgba(47,216,198,.32);}
.nav-card.is-active i{color:var(--brand-2);}
.nav-cta{height:42px;padding:0 20px;font-size:14.5px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  color:var(--ink-0);font-size:16px;cursor:pointer;
}
.nav-toggle:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;}
/* ---------- 阅读进度 ---------- */
.read-progress{position:fixed;top:0;left:0;right:0;height:3px;background:rgba(255,255,255,.05);z-index:90;}
.read-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand-2),var(--brand));box-shadow:0 0 14px rgba(47,216,198,.6);transition:width .1s linear;}
/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;overflow:hidden;
  padding:96px 0 56px;
  border-bottom:1px solid var(--line);
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.28;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,19,.86),rgba(6,10,19,.96) 70%,var(--bg-0)),
             linear-gradient(115deg,rgba(47,216,198,.16),transparent 46%);
}
.article-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-2);margin-bottom:22px;
}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb span.sep{opacity:.6;}
.breadcrumb .now{color:var(--ink-1);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;border-radius:8px;font-size:12.5px;
  color:var(--brand-2);
  background:rgba(47,216,198,.09);
  border:1px solid rgba(47,216,198,.26);
  margin-bottom:18px;
}
.article-hero h1{font-size:44px;max-width:900px;margin-bottom:22px;}
.meta-row{
  display:flex;flex-wrap:wrap;gap:22px;
  padding-top:18px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-2);
}
.meta-row i{color:var(--brand-2);margin-right:6px;font-size:12px;}
/* ---------- 正文布局 ---------- */
.article-wrap{padding:72px 0 96px;}
.article-main{max-width:760px;}
.article-body{font-size:16.5px;line-height:1.9;color:var(--ink-1);}
.article-body h2{
  position:relative;
  font-size:28px;color:var(--ink-0);
  margin:48px 0 18px;padding-top:6px;
}
.article-body h2::before{
  content:"";position:absolute;top:-22px;left:0;
  width:40px;height:3px;border-radius:2px;
  background:var(--brand-2);box-shadow:0 0 12px rgba(47,216,198,.6);
}
.article-body h2:first-child{margin-top:0;}
.article-body h2:first-child::before{display:none;}
.article-body h3{font-size:20px;color:var(--ink-0);margin:34px 0 14px;}
.article-body p{margin:0 0 1.2em;color:var(--ink-1);}
.article-body strong{color:var(--ink-0);}
.article-body a{color:var(--brand-2);border-bottom:1px solid rgba(47,216,198,.35);}
.article-body a:hover{color:var(--brand-2);opacity:.85;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0;}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--ink-1);}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:12px;
  width:7px;height:7px;border-radius:50%;
  background:var(--brand-2);box-shadow:0 0 8px rgba(47,216,198,.6);
}
.article-body ol{counter-reset:num;}
.article-body ol li{counter-increment:num;}
.article-body ol li::before{
  content:counter(num);
  position:absolute;left:0;top:2px;
  font-family:var(--font-num);font-size:14px;font-weight:600;
  color:var(--brand-2);
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;
  border-left:3px solid var(--brand-2);
  background:var(--glass-soft);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  color:var(--ink-1);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-sm);margin:22px 0;width:100%;height:auto;object-fit:cover;background:rgba(255,255,255,.04);}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:10px;}
.article-body table{
  display:block;overflow-x:auto;width:100%;
  border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--radius-sm);
}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;}
.article-body th{background:rgba(76,107,255,.1);color:var(--ink-0);font-weight:600;}
.article-body pre{
  overflow-x:auto;padding:18px 20px;margin:24px 0;
  background:#050912;border:1px solid var(--line);
  border-radius:var(--radius-sm);font-size:14px;color:var(--ink-1);
}
.article-body code{font-family:var(--font-num);background:rgba(76,107,255,.14);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--ink-0);}
.article-body pre code{background:none;padding:0;}
.empty-state{
  text-align:center;padding:64px 28px;
  background:var(--glass-soft);border:1px dashed var(--line-strong);
  border-radius:var(--radius-lg);
}
.empty-state i{font-size:30px;color:var(--brand-2);margin-bottom:16px;display:block;}
.empty-state p{color:var(--ink-1);margin-bottom:22px;}
/* ---------- 文末 ---------- */
.article-foot{margin-top:56px;padding-top:26px;border-top:1px solid var(--line);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag{
  padding:5px 13px;border-radius:999px;font-size:13px;color:var(--ink-1);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.tag:hover{color:var(--brand-2);border-color:rgba(47,216,198,.35);}
.article-nav{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;}
/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:110px;align-self:flex-start;}
.aside-card{padding:22px;margin-bottom:18px;}
.aside-card h4{font-size:15px;margin-bottom:12px;color:var(--ink-0);}
.aside-card p{font-size:14px;color:var(--ink-2);margin:0 0 16px;line-height:1.75;}
.aside-list a{
  display:flex;align-items:center;gap:9px;
  font-size:14px;color:var(--ink-1);padding:9px 0;
  border-bottom:1px solid var(--line);
}
.aside-list a:last-child{border-bottom:none;}
.aside-list a:hover{color:var(--brand-2);transform:translateX(2px);}
.aside-list i{color:var(--brand-2);font-size:12px;}
/* ---------- 相关推荐 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 26px 70px -32px rgba(76,107,255,.5);}
.post-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:rgba(255,255,255,.04);}
.post-cover img{width:100%;height:100%;object-fit:cover;}
.post-badge{
  position:absolute;top:12px;left:12px;
  padding:4px 10px;border-radius:8px;font-size:12px;
  color:var(--ink-0);background:rgba(6,10,19,.6);
  border:1px solid var(--line);backdrop-filter:blur(10px);
}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.post-body h3{
  font-size:17px;line-height:1.45;margin-bottom:10px;color:var(--ink-0);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body p{
  font-size:14px;color:var(--ink-2);line-height:1.7;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
}
.post-meta i{color:var(--brand-2);}
/* ---------- CTA 表单 ---------- */
.cta-section{position:relative;padding:var(--space-section) 0;border-top:1px solid var(--line);background:var(--bg-1);}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.cta-copy h2{font-size:34px;margin-bottom:16px;}
.cta-copy p{color:var(--ink-1);max-width:460px;}
.cta-points{margin-top:26px;display:grid;gap:12px;}
.cta-points div{display:flex;gap:10px;align-items:center;font-size:14.5px;color:var(--ink-1);}
.cta-points i{color:var(--brand-2);}
.form-card{padding:28px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--ink-1);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;height:44px;padding:0 14px;
  background:rgba(6,10,19,.6);
  border:1px solid var(--line);border-radius:var(--radius-sm);
  color:var(--ink-0);font-size:15px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-2);}
.field input:focus,.field textarea:focus{border-color:var(--brand-2);box-shadow:0 0 0 2px rgba(47,216,198,.22);}
.form-note{font-size:12.5px;color:var(--ink-2);margin:14px 0 0;}
.form-card .btn{width:100%;}
/* ---------- 页脚 ---------- */
.site-footer{background:#050912;border-top:1px solid var(--line);padding:68px 0 26px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--ink-2);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--ink-0);}
.footer-col a{display:block;font-size:14px;color:var(--ink-2);padding:6px 0;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:var(--brand-2);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12px;color:var(--ink-2);
}
/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:9px;
  height:50px;padding:0 22px;border-radius:999px;
  background:linear-gradient(90deg,var(--brand-2),var(--brand));
  color:#05121A;font-weight:700;font-size:15px;
  box-shadow:var(--shadow-glow);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{color:#05121A;}
/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-inview{opacity:1;transform:none;}
/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--space-section:88px;}
  .article-hero h1{font-size:38px;}
  .article-body h2{font-size:25px;}
  .section-head h2{font-size:32px;}
}
@media (max-width:959px){
  :root{--space-section:80px;}
  .nav-cards{
    position:fixed;inset:0;z-index:80;
    display:grid;grid-template-columns:1fr 1fr;gap:12px;
    align-content:start;padding:88px 24px 24px;
    background:rgba(6,10,19,.97);backdrop-filter:blur(20px);
    border:none;border-radius:0;overflow-y:auto;
    transform:translateY(-100%);transition:transform .32s ease;
  }
  .nav-cards.is-open{transform:translateY(0);}
  .nav-card{
    flex-direction:column;justify-content:center;gap:8px;
    height:96px;border:1px solid var(--line);border-radius:var(--radius-md);
    font-size:15px;
  }
  .nav-card:last-child{border:1px solid var(--line);}
  .nav-toggle{display:flex;align-items:center;justify-content:center;margin-left:auto;}
  .nav-cta{display:none;}
  .nav-cards::after{
    content:"";grid-column:1 / -1;
  }
  .article-hero{padding:76px 0 44px;}
  .article-aside{position:static;margin-top:40px;}
  .article-main{max-width:100%;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .article-body h2{font-size:23px;}
}
@media (max-width:639px){
  :root{--space-section:64px;}
  body{font-size:16px;padding-bottom:86px;}
  .site-header{padding:0 16px;top:10px;}
  .nav-panel{padding:10px 14px;border-radius:16px;}
  .brand-text{font-size:15px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .article-hero{padding:64px 0 36px;}
  .article-hero h1{font-size:30px;}
  .section-head h2{font-size:26px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:21px;margin-top:40px;}
  .article-body h2::before{top:-18px;}
  .related-grid{grid-template-columns:1fr;}
  .cta-copy h2{font-size:26px;}
  .form-card{padding:20px;}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    justify-content:center;height:60px;
    padding-bottom:env(safe-area-inset-bottom);
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A13;
  --bg-1:#0A1120;
  --brand:#4C6BFF;
  --brand-2:#2FD8C6;
  --accent:#FFB15C;
  --ink-0:#EAF0FF;
  --ink-1:#A9B6D0;
  --ink-2:#6E7C99;
  --line:rgba(140,180,255,.14);
  --line-strong:rgba(140,180,255,.28);
  --glass:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.025));
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow:0 20px 60px -30px rgba(76,107,255,.35);
  --glow:0 0 0 1px rgba(47,216,198,.35),0 10px 30px -10px rgba(47,216,198,.5);
  --sec-y:104px;
  --font:"Noto Sans SC","PingFang SC","HarmonyOS Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","Space Grotesk","SF Mono",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-0);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
h1,h2,h3,h4,h5{font-family:var(--font);color:var(--ink-0);font-weight:700;line-height:1.2;letter-spacing:-.01em;margin:0}
p{margin:0;color:var(--ink-1);line-height:1.85}
a{color:inherit;text-decoration:none;transition:color .25s ease,background .25s ease,border-color .25s ease}
a:hover{color:var(--brand-2)}
img{max-width:100%;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;margin:0}
ul{margin:0;padding:0;list-style:none}
figure{margin:0}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}
[id]{scroll-margin-top:118px}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:60;padding:16px 24px;background:linear-gradient(180deg,rgba(6,10,19,.9),rgba(6,10,19,0));transition:background .3s ease,padding .3s ease}
.site-header.is-compact{background:rgba(6,10,19,.92);padding:8px 24px;backdrop-filter:blur(14px)}
.nav-panel{
  max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:16px;
  padding:10px 14px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:rgba(10,17,32,.74);backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow);transition:padding .3s ease,background .3s ease;
}
.site-header.is-compact .nav-panel{padding:6px 12px;background:rgba(10,17,32,.92)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(47,216,198,.9),rgba(76,107,255,.9));
  color:#05121A;font-size:17px;box-shadow:0 8px 22px -12px rgba(47,216,198,.8);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-cards{
  display:flex;align-items:center;flex:1;min-width:0;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:rgba(255,255,255,.02);
}
.nav-card{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 15px;font-size:14px;color:var(--ink-1);
  border-right:1px solid var(--line);white-space:nowrap;transition:background .25s ease,color .25s ease;
}
.nav-card:last-child{border-right:none}
.nav-card i{font-size:14px;opacity:.9}
.nav-card:hover{background:rgba(255,255,255,.06);color:var(--ink-0)}
.nav-card.is-active{color:var(--ink-0);background:rgba(47,216,198,.08);box-shadow:inset 0 0 0 1px rgba(47,216,198,.45)}
.nav-cta{flex-shrink:0;height:42px;padding:0 20px;font-size:14.5px}
.drawer-cta{display:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--ink-0);cursor:pointer;flex-shrink:0;
}
.nav-toggle:hover{background:rgba(255,255,255,.09)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,filter .25s ease;
}
.btn-primary{
  background:linear-gradient(90deg,#2FD8C6,#4C6BFF);color:#05121A;box-shadow:var(--glow);
}
.btn-primary:hover{
  filter:brightness(1.08);transform:translateY(-2px);color:#05121A;
  box-shadow:0 0 0 1px rgba(47,216,198,.5),0 16px 36px -12px rgba(47,216,198,.65);
}
.btn-primary:active{transform:none;box-shadow:inset 0 2px 10px rgba(0,0,0,.35)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink-0)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(47,216,198,.4);color:var(--ink-0)}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:var(--r-pill);
  background:linear-gradient(90deg,#2FD8C6,#4C6BFF);color:#05121A;font-size:14.5px;font-weight:700;
  box-shadow:var(--glow);opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta:hover{color:#05121A;filter:brightness(1.07)}

/* Hero */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:52px 0 72px}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,19,.74),rgba(6,10,19,.94)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.cat-hero::after{
  content:"";position:absolute;top:-30%;left:-15%;width:65%;height:160%;pointer-events:none;
  background:linear-gradient(100deg,rgba(0,0,0,0),rgba(47,216,198,.17),rgba(0,0,0,0));
  transform:rotate(-8deg);filter:blur(24px);
}
.cat-hero .grid-container{position:relative;z-index:2}
.crumb{font-size:13px;color:var(--ink-2);display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand-2)}
.crumb .sep{opacity:.6}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.05);font-size:12.5px;color:var(--ink-1);
}
.badge i{color:var(--brand-2);font-size:12px}
.cat-hero h1{font-size:52px;margin:20px 0 18px}
.hero-sub{font-size:17px;color:var(--ink-1);max-width:660px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.glass-strip{
  margin-top:30px;padding:18px 20px;border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(16px) saturate(140%);
  font-size:14.5px;color:var(--ink-1);line-height:1.8;max-width:680px;
}
.hero-visual{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:rgba(255,255,255,.04);box-shadow:var(--shadow);
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual figcaption{
  padding:12px 16px;font-size:13px;color:var(--ink-2);border-top:1px solid var(--line);
  background:rgba(6,10,19,.5);
}

/* 数据带 */
.metrics-section{padding:56px 0 8px}
.metric-strip{
  display:flex;flex-wrap:wrap;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;background:var(--glass);backdrop-filter:blur(16px) saturate(140%);
}
.metric{
  flex:1 1 25%;min-width:200px;padding:22px 24px;
  box-shadow:inset -1px -1px 0 0 var(--line);
}
.metric .num{font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.metric .unit{font-size:14px;color:var(--ink-1);margin-left:5px;font-weight:500}
.metric .label{display:block;font-size:13.5px;color:var(--ink-2);margin-top:6px}

/* 主体区 */
.section{padding:var(--sec-y) 0}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:34px}
.sec-index{font-family:var(--font-num);font-size:13px;letter-spacing:.18em;color:var(--brand-2);display:block;margin-bottom:12px}
.sec-head h2{font-size:36px}
.sec-head p{font-size:16px;color:var(--ink-1);margin-top:14px;max-width:720px}

/* 目录卡 */
.toc-card{
  position:sticky;top:104px;padding:20px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--shadow);
}
.toc-card h3{font-size:13px;letter-spacing:.14em;color:var(--ink-2);font-weight:600;margin-bottom:14px}
.toc-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:14px;color:var(--ink-1);margin-bottom:6px;
}
.toc-link:last-child{margin-bottom:0}
.toc-link i{font-size:11px;opacity:.6}
.toc-link:hover{background:rgba(255,255,255,.05);color:var(--ink-0)}
.toc-link.is-current{color:var(--ink-0);border-color:rgba(47,216,198,.45);background:rgba(47,216,198,.08)}
.toc-note{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);line-height:1.7;
}

/* 内容流 */
.flow-block{padding:38px 0;border-top:1px solid var(--line)}
.flow-block:first-child{padding-top:0;border-top:none}
.flow-block h2{font-size:32px;margin-bottom:14px}
.flow-block h3{font-size:22px;margin-bottom:12px}
.flow-block p + p{margin-top:14px}
.flow-lead{font-size:16.5px;color:var(--ink-1)}
.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.point-card{
  padding:20px;border-radius:var(--r-md);border:1px solid var(--line);
  background:rgba(255,255,255,.03);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.point-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.4);box-shadow:var(--shadow)}
.icon-block{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;margin-bottom:14px;
  background:rgba(76,107,255,.16);border:1px solid var(--line);color:var(--brand-2);font-size:15px;
}
.point-card h4{font-size:16px;margin-bottom:8px}
.point-card p{font-size:14.5px;color:var(--ink-1);line-height:1.8}
.media-card{
  margin-top:26px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);
  background:rgba(255,255,255,.04);
}
.media-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.media-card figcaption{padding:11px 16px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-2);background:rgba(6,10,19,.55)}
.dot-list{margin-top:20px;display:grid;gap:12px}
.dot-list li{
  position:relative;padding-left:20px;font-size:15px;color:var(--ink-1);line-height:1.8;
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--brand-2);box-shadow:0 0 12px rgba(47,216,198,.7);
}
.steps{margin-top:24px;display:grid;gap:14px}
.step{
  display:flex;gap:18px;padding:18px 20px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(12px);
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:rgba(47,216,198,.4);transform:translateX(4px)}
.step-num{font-family:var(--font-num);font-size:20px;font-weight:700;color:var(--brand-2);min-width:34px}
.step h4{font-size:16px;margin-bottom:6px}
.step p{font-size:14.5px}
.next-card{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  margin-top:24px;padding:26px;border-radius:var(--r-lg);border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,216,198,.12),rgba(76,107,255,.12));
}
.next-card h3{font-size:20px;margin-bottom:8px}
.next-card p{font-size:14.5px;max-width:520px}

/* 表单 CTA */
.cta-section{padding:var(--sec-y) 0;border-top:1px solid var(--line);background:var(--bg-1);position:relative;overflow:hidden}
.cta-section::after{
  content:"";position:absolute;right:-10%;top:-40%;width:45%;height:180%;pointer-events:none;
  background:radial-gradient(closest-side,rgba(47,216,198,.16),rgba(0,0,0,0));filter:blur(10px);
}
.cta-section .grid-container{position:relative;z-index:2}
.cta-copy h2{font-size:36px;margin-bottom:16px}
.cta-copy p{font-size:16px;color:var(--ink-1);max-width:520px}
.cta-points{margin-top:26px;display:grid;gap:12px}
.cta-points li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--ink-1)}
.cta-points i{color:var(--brand-2);font-size:13px}
.form-card{
  padding:28px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--shadow);
}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--ink-1);margin-bottom:8px}
.field input,.field textarea{
  width:100%;padding:0 14px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(6,10,19,.72);color:var(--ink-0);
  font-size:15px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-2)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-2);background:rgba(6,10,19,.9);
  box-shadow:0 0 0 2px rgba(47,216,198,.28);
}
.form-card .btn{width:100%;margin-top:6px}
.privacy-note{margin-top:14px;font-size:12.5px;color:var(--ink-2);line-height:1.7}

/* 页脚 */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 26px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--ink-2);line-height:1.85;max-width:340px}
.footer-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;font-weight:600}
.footer-col a{display:block;font-size:14px;color:var(--ink-2);margin-bottom:11px}
.footer-col a:hover{color:var(--brand-2);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12px;color:var(--ink-2);
}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* 平板 */
@media screen and (max-width:1199px){
  .cat-hero h1{font-size:44px}
  .sec-head h2,.cta-copy h2{font-size:32px}
  .flow-block h2{font-size:28px}
  .nav-card{padding:0 12px;font-size:13.5px}
}
@media screen and (max-width:959px){
  :root{--sec-y:80px}
  .site-header{padding:12px 16px}
  .site-header.is-compact{padding:8px 16px}
  .nav-cta{display:none}
  .nav-toggle{display:inline-grid;place-items:center}
  .nav-cards{
    position:fixed;inset:0;z-index:80;flex:none;
    display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:start;
    padding:104px 20px 40px;border:none;border-radius:0;
    background:rgba(6,10,19,.97);backdrop-filter:blur(20px) saturate(140%);
    transform:translateY(-100%);opacity:0;visibility:hidden;
    transition:transform .32s ease,opacity .32s ease,visibility .32s ease;
  }
  .nav-cards.is-open{transform:none;opacity:1;visibility:visible}
  .nav-cards .nav-card{
    height:auto;padding:20px 16px;border:1px solid var(--line);border-radius:var(--r-md);
    flex-direction:column;align-items:flex-start;gap:10px;font-size:14.5px;
  }
  .nav-cards .nav-card i{font-size:18px;color:var(--brand-2)}
  .drawer-cta{display:inline-flex;grid-column:1/-1;margin-top:12px;height:50px}
  .cat-hero{padding:36px 0 56px}
  .cat-hero h1{font-size:34px;margin:16px 0 14px}
  .hero-sub{font-size:16px}
  .metrics-section{padding:40px 0 0}
  .metric{flex:1 1 50%;min-width:0}
  .toc-card{position:static;margin-bottom:26px}
  .point-grid{grid-template-columns:1fr}
  .footer-col{margin-top:28px}
}
@media screen and (max-width:639px){
  :root{--sec-y:64px}
  body{font-size:16px}
  .grid-container{padding-left:16px;padding-right:16px}
  .brand-text{font-size:15px}
  .brand-mark{width:34px;height:34px;font-size:15px}
  .nav-panel{gap:10px;padding:8px 10px}
  .cat-hero h1{font-size:34px}
  .sec-head h2,.cta-copy h2,.flow-block h2{font-size:26px}
  .flow-block h3{font-size:19px}
  .btn{height:46px;padding:0 20px;font-size:14.5px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .metric{padding:18px}
  .metric .num{font-size:25px}
  .form-card{padding:20px}
  .site-footer{padding-bottom:100px}
  .float-cta{
    left:0;right:0;bottom:0;justify-content:center;border-radius:0;
    padding:15px 16px calc(15px + env(safe-area-inset-bottom,0px));
    font-size:15px;
  }
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --bg-0:#060A13;
  --bg-1:#0A1120;
  --brand:#4C6BFF;
  --brand-2:#2FD8C6;
  --accent:#FFB15C;
  --ink-0:#EAF0FF;
  --ink-1:#A9B6D0;
  --ink-2:#6E7C99;
  --line:rgba(140,180,255,.14);
  --line-strong:rgba(140,180,255,.3);
  --glass:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.025));
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow:0 20px 60px -30px rgba(76,107,255,.35);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35),0 10px 30px -10px rgba(47,216,198,.5);
  --pad-section:104px;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Space Grotesk","Inter",var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-0);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(76,107,255,.16),transparent 70%),
    radial-gradient(760px 460px at 92% 6%,rgba(47,216,198,.1),transparent 72%);
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-sm)}
a{color:var(--ink-0);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--brand-2)}
p{margin:0 0 1.05em}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em;color:var(--ink-0)}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px}
.grid-x{display:flex;flex-wrap:wrap}
.cell{min-width:0}

/* 通用 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,filter .25s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:linear-gradient(90deg,var(--brand-2),var(--brand));color:#05121A;box-shadow:var(--shadow-glow)}
.btn-primary:hover{color:#05121A;transform:translateY(-2px);filter:brightness(1.08)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 10px rgba(0,0,0,.35)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-0)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(47,216,198,.4);color:var(--ink-0)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{display:flex;width:100%}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed}

.badge{
  display:inline-flex;align-items:center;gap:7px;
  height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:13px;color:var(--ink-1);letter-spacing:.02em;
}
.badge i{font-size:12px;color:var(--brand-2)}

.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow);
}

.section{padding:var(--pad-section) 0;position:relative;z-index:1}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:13px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--brand-2);margin-bottom:14px;
}
.section-head h2{font-size:36px;margin-bottom:14px}
.section-head p{color:var(--ink-1);font-size:16px;margin:0}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;padding:16px 24px 0}
.nav-panel{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:12px 18px;border-radius:18px;
  border:1px solid var(--line);
  background:rgba(10,17,32,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow);
  transition:padding .3s ease,background .3s ease,box-shadow .3s ease;
}
.site-header.is-compact .nav-panel{padding:7px 18px;background:rgba(7,12,23,.94)}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;font-size:15px;color:#05121A;
  background:linear-gradient(135deg,var(--brand-2),var(--brand));
  box-shadow:0 8px 22px -10px rgba(47,216,198,.7);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.005em;white-space:nowrap}
.nav-cards{
  display:flex;align-items:center;margin:0 auto;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:rgba(255,255,255,.02);
}
.nav-card{
  display:flex;align-items:center;gap:7px;
  height:40px;padding:0 15px;font-size:14px;color:var(--ink-1);
  border-right:1px solid var(--line);transition:background .22s ease,color .22s ease;
}
.nav-card:last-child{border-right:none}
.nav-card i{font-size:14px;opacity:.85}
.nav-card:hover{background:rgba(255,255,255,.06);color:var(--ink-0)}
.nav-card.is-active{color:var(--brand-2);background:rgba(47,216,198,.08);box-shadow:inset 0 0 0 1px rgba(47,216,198,.35)}
.nav-cta{flex-shrink:0;height:42px;padding:0 20px;font-size:14.5px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--ink-0);font-size:16px;cursor:pointer;
}

/* 分类首屏 */
.cat-hero{
  position:relative;overflow:hidden;
  padding:118px 0 104px;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,19,.88),rgba(6,10,19,.74));
}
.cat-hero::after{
  content:"";position:absolute;top:-45%;left:-12%;width:64%;height:190%;
  background:linear-gradient(100deg,rgba(47,216,198,.2),rgba(47,216,198,0) 62%);
  transform:rotate(9deg);pointer-events:none;
}
.cat-hero .hero-inner{position:relative;z-index:2;max-width:880px}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);margin-bottom:22px}
.crumbs a{color:var(--ink-1)}
.crumbs a:hover{color:var(--brand-2)}
.crumbs span{color:var(--ink-2)}
.cat-hero h1{font-size:52px;margin:18px 0 20px;max-width:15em}
.cat-hero .hero-sub{font-size:17.5px;color:var(--ink-1);max-width:640px;margin:0 0 30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}

.intro-strip{padding:0;position:relative;z-index:5;margin-top:-46px}
.glass-strip{
  padding:24px 28px;border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);
}
.glass-strip p{margin:0;color:var(--ink-1);font-size:15.5px;line-height:1.8}
.glass-strip strong{color:var(--ink-0);font-weight:600}

/* 卡片矩阵 */
.matrix-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.matrix-card{
  display:flex;flex-direction:column;
  padding:26px 24px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.matrix-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 60px -34px rgba(76,107,255,.55)}
.matrix-icon{
  width:44px;height:44px;border-radius:13px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;color:var(--brand-2);
  background:rgba(47,216,198,.1);
  border:1px solid rgba(47,216,198,.28);
  margin-bottom:18px;
}
.matrix-card h3{font-size:19px;margin-bottom:10px}
.matrix-card p{color:var(--ink-1);font-size:15px;line-height:1.8;margin:0 0 18px}
.card-link{
  margin-top:auto;padding-top:16px;
  border-top:1px solid var(--line);
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--ink-1);
}
.card-link i{font-size:12px;transition:transform .22s ease}
.card-link:hover{color:var(--brand-2)}
.card-link:hover i{transform:translateX(3px)}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  padding:24px 22px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:border-color .25s ease,background .25s ease;
}
.step:hover{border-color:rgba(47,216,198,.35);background:rgba(47,216,198,.05)}
.step-num{
  font-family:var(--font-num);font-size:13px;letter-spacing:.14em;
  color:var(--accent);margin-bottom:14px;display:block;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--ink-1);font-size:14.5px;line-height:1.78;margin:0}

/* 图文区 */
.split{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center}
.split-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.split-media img{width:100%;height:380px;object-fit:cover;border-radius:0}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,19,.05),rgba(6,10,19,.55));
}
.split-media .media-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  padding:6px 12px;border-radius:8px;font-size:12.5px;
  background:rgba(10,17,32,.72);border:1px solid var(--line);
  backdrop-filter:blur(10px);color:var(--ink-1);
}
.checks li{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 0;border-bottom:1px dashed var(--line);
}
.checks li:last-child{border-bottom:none}
.checks i{color:var(--brand-2);font-size:15px;margin-top:6px}
.checks strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px}
.checks span{color:var(--ink-1);font-size:14.5px;line-height:1.78}

/* FAQ */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0;background:transparent;border:none;cursor:pointer;
  text-align:left;font-size:17px;font-weight:600;color:var(--ink-0);
  transition:color .22s ease;
}
.faq-q:hover{color:var(--brand-2)}
.faq-q i{font-size:14px;color:var(--ink-2);transition:transform .28s ease,color .22s ease;flex-shrink:0}
.faq-item.is-open .faq-q{color:var(--brand-2)}
.faq-item.is-open .faq-q i{transform:rotate(135deg);color:var(--brand-2)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{
  margin:0;padding:0 20px 24px;color:var(--ink-1);
  font-size:15.5px;line-height:1.8;
}

/* CTA 表单 */
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.cta-copy h2{font-size:34px;margin-bottom:16px}
.cta-copy p{color:var(--ink-1);font-size:16px}
.cta-points{margin-top:26px;display:grid;gap:12px}
.cta-points li{display:flex;gap:10px;align-items:center;color:var(--ink-1);font-size:15px}
.cta-points i{color:var(--brand-2);font-size:13px}
.form-card{padding:30px 28px;border-radius:var(--r-lg)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--ink-1);margin-bottom:8px}
.lead-form input,.lead-form textarea{
  width:100%;height:44px;padding:0 14px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--ink-0);font-size:15px;font-family:inherit;
  box-shadow:none;margin:0;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.lead-form textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7}
.lead-form input::placeholder,.lead-form textarea::placeholder{color:var(--ink-2)}
.lead-form input:focus,.lead-form textarea:focus{
  outline:none;border-color:var(--brand-2);
  box-shadow:0 0 0 2px rgba(47,216,198,.28);
  background:rgba(255,255,255,.06);
}
.form-note{font-size:12.5px;color:var(--ink-2);margin:14px 0 0;line-height:1.7}
.form-msg{display:none;margin-top:14px;font-size:14px;color:var(--brand-2)}
.form-msg.is-show{display:block}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.is-show{opacity:1;transform:translateY(0);pointer-events:auto}

/* 页脚 */
.site-footer{
  position:relative;z-index:1;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(6,10,19,.9),rgba(4,8,15,1));
  padding:72px 0 28px;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;margin-bottom:16px}
.footer-desc{color:var(--ink-1);font-size:14.5px;line-height:1.85;margin:0;max-width:340px}
.footer-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;letter-spacing:.02em}
.footer-col a{
  display:block;font-size:14px;color:var(--ink-1);
  padding:6px 0;transition:color .22s ease,transform .22s ease;
}
.footer-col a:hover{color:var(--brand-2);transform:translateX(2px)}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12px;color:var(--ink-2);
}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1199px){
  .cat-hero h1{font-size:44px}
  .section-head h2{font-size:31px}
  :root{--pad-section:88px}
}
@media (max-width:960px){
  .nav-cards{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:80;
    margin:0;padding:96px 20px 120px;
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
    grid-auto-rows:min-content;gap:12px;align-content:start;
    background:rgba(6,10,19,.985);
    border:none;border-radius:0;overflow-y:auto;
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform .32s ease,opacity .32s ease;
  }
  .nav-cards.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-card{
    height:auto;min-height:60px;padding:0 16px;font-size:15px;
    border:1px solid var(--line);border-radius:var(--r-md);
    background:rgba(255,255,255,.03);
  }
  .nav-toggle{display:inline-flex;order:3}
  .nav-panel.is-open .nav-cta{
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    height:54px;border-radius:0;display:flex;
    margin:0;padding:0 20px calc(12px + env(safe-area-inset-bottom)) 20px;
    height:auto;min-height:54px;
  }
  .site-header{padding:12px 16px 0}
  .brand-text{font-size:15px}
  .nav-cta{display:none}
  .nav-panel.is-open .nav-cta{display:flex}
  .cat-hero{padding:88px 0 84px}
  .cat-hero h1{font-size:36px}
  .cat-hero .hero-sub{font-size:16px}
  .intro-strip{margin-top:-38px}
  .matrix-grid{grid-template-columns:1fr;gap:18px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:28px}
  .split-media img{height:300px}
  .cta-grid{grid-template-columns:1fr;gap:30px}
  .section-head h2{font-size:27px}
  :root{--pad-section:76px}
}
@media (max-width:639px){
  .grid-container{padding-left:16px;padding-right:16px}
  body{font-size:16px}
  .cat-hero h1{font-size:34px}
  .cat-hero{padding:74px 0 76px}
  .hero-actions .btn{flex:1 1 auto}
  .glass-strip{padding:20px}
  .matrix-card{padding:22px 18px}
  .steps{grid-template-columns:1fr}
  .split-media img{height:230px}
  .cta-copy h2{font-size:26px}
  .form-card{padding:24px 18px}
  .float-cta{left:0;right:0;bottom:0;padding:0 12px calc(12px + env(safe-area-inset-bottom))}
  .float-cta .btn{width:100%;height:50px}
  .site-footer{padding-bottom:96px}
  .faq-q{font-size:16px}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}