/* roulang page: index */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1424;
  --bg-700:#101D33;
  --brand-500:#1FB6FF;
  --brand-600:#0B7BFF;
  --brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;
  --accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;
  --text-2:#9FB3CE;
  --text-3:#6B7F9B;
  --ink-1:#0B1A2E;
  --ink-2:#4A5C74;
  --line:rgba(120,170,225,.14);
  --line-strong:rgba(120,170,225,.28);
  --glass-bg:rgba(255,255,255,.06);
  --glass-brd:rgba(150,200,255,.18);
  --ok:#35D6A4;
  --warn:#FFC24A;
  --err:#FF6B7A;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(11,123,255,.18);
  --shadow-glow:0 0 0 1px rgba(124,255,178,.35),0 10px 30px -8px rgba(124,255,178,.5);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);object-fit:cover;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:Inter,-apple-system,"Segoe UI",Arial,sans-serif;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  background:#FFFFFF;
  border-bottom:1px solid rgba(11,26,46,.08);
  box-shadow:0 1px 2px rgba(11,26,46,.05);
  transition:height .25s ease, box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 6px 22px rgba(11,26,46,.14);}
.nav-wrap{
  height:68px;display:flex;align-items:center;gap:24px;
  transition:height .25s ease;
}
.site-header.scrolled .nav-wrap{height:60px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#03121F;font-size:17px;box-shadow:0 6px 16px rgba(11,123,255,.35);
}
.logo-text{font-size:17px;font-weight:700;color:var(--ink-1);letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1;}
.nav-links a{
  position:relative;padding:8px 12px;font-size:15px;color:var(--ink-2);border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand-600);background:rgba(11,123,255,.06);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-600);font-weight:600;}
.nav-aside{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:999px;border:1px solid rgba(11,26,46,.14);background:#F5F8FC;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search-box i{color:var(--ink-2);font-size:14px;}
.search-box input{
  border:0;background:transparent;width:132px;font-size:14px;color:var(--ink-1);
}
.search-box input::placeholder{color:#90A0B5;}
.search-box input:focus{outline:none;}
.search-box:focus-within{
  border-color:var(--brand-500);background:#fff;
  box-shadow:0 0 0 3px rgba(31,182,255,.16);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;padding:11px 22px;white-space:nowrap;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:var(--accent-400);color:var(--accent-ink);box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(124,255,178,.5),0 14px 38px -8px rgba(124,255,178,.6);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:var(--glass-bg);color:var(--brand-glow);
  border:1px solid var(--glass-brd);backdrop-filter:blur(16px) saturate(150%);
}
.btn-ghost:hover{border-color:var(--brand-500);color:#fff;transform:translateY(-1px);}
.btn-outline{
  background:transparent;color:var(--brand-600);border:1px solid rgba(11,123,255,.35);
}
.btn-outline:hover{background:rgba(11,123,255,.08);border-color:var(--brand-600);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn:disabled,.btn[disabled]{background:#3A4A63;color:#8B9BB4;box-shadow:none;cursor:not-allowed;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-size:14px;font-weight:600;
}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(3px);}
.burger{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(11,26,46,.14);
  background:#F5F8FC;color:var(--ink-1);cursor:pointer;
}
.mobile-drawer{
  display:none;background:#fff;border-top:1px solid rgba(11,26,46,.08);
  padding:12px 24px 20px;box-shadow:0 18px 32px rgba(11,26,46,.16);
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:block;padding:12px 10px;border-radius:10px;color:var(--ink-1);font-size:15px;
  border-bottom:1px solid rgba(11,26,46,.06);
}
.mobile-drawer a.active{color:var(--brand-600);font-weight:600;background:rgba(11,123,255,.07);}
.mobile-drawer .btn{width:100%;margin-top:14px;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(100deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.78) 42%,rgba(5,10,20,.62) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  padding:96px 0 88px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(700px 420px at 8% 12%,rgba(31,182,255,.22),transparent 65%),
             radial-gradient(520px 320px at 88% 88%,rgba(124,255,178,.12),transparent 70%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;left:0;bottom:0;width:340px;height:200px;opacity:.35;
  background-image:linear-gradient(rgba(111,219,255,.35) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(111,219,255,.35) 1px,transparent 1px);
  background-size:28px 28px;
  mask-image:radial-gradient(circle at 30% 70%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 30% 70%,#000,transparent 72%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(31,182,255,.12);border:1px solid rgba(31,182,255,.32);
  color:var(--brand-glow);font-size:13px;letter-spacing:.02em;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero h1 em{font-style:normal;color:var(--accent-400);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text-2);
  padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);
}
.chip i{color:var(--brand-500);font-size:12px;}
.glass-card{
  background:var(--glass-bg);border:1px solid var(--glass-brd);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  padding:28px;box-shadow:var(--shadow-1);
}
.glass-card h2{font-size:18px;font-weight:700;margin-bottom:18px;letter-spacing:-.01em;}
.glass-list li{
  display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);
}
.glass-list li:first-child{border-top:0;padding-top:0;}
.glass-list .g-idx{
  flex-shrink:0;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  background:rgba(31,182,255,.16);color:var(--brand-glow);font-size:13px;font-weight:700;
}
.glass-list strong{display:block;font-size:15px;font-weight:600;margin-bottom:3px;}
.glass-list span{font-size:13px;color:var(--text-2);line-height:1.6;}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.sec-head h2{
  font-size:clamp(22px,2.4vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.3;margin-top:10px;
}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-glow);letter-spacing:.06em;text-transform:uppercase;
}
.sec-tag::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-500);}
.sec-desc{color:var(--text-2);font-size:15px;max-width:640px;margin-top:12px;}

/* 序号主轴条目 */
.axis-wrap{display:grid;grid-template-columns:1.5fr .9fr;gap:48px;align-items:start;}
.axis-list{border-top:1px solid var(--line);}
.axis-item{
  display:grid;grid-template-columns:64px 1fr 34px;align-items:center;gap:18px;
  padding:26px 12px;border-bottom:1px solid var(--line);
  transition:background .2s ease,padding-left .2s ease;
}
.axis-item:hover{background:rgba(31,182,255,.06);padding-left:20px;}
.axis-num{
  font-size:22px;font-weight:700;color:var(--brand-500);letter-spacing:.02em;
}
.axis-item h3{font-size:18px;font-weight:600;margin-bottom:5px;letter-spacing:-.01em;}
.axis-item p{font-size:14px;color:var(--text-2);line-height:1.65;}
.axis-arrow{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-3);transition:all .2s ease;
}
.axis-item:hover .axis-arrow{border-color:var(--brand-500);color:var(--brand-500);transform:translateX(3px);}
.axis-figure{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--shadow-2);}
.axis-figure img{width:100%;height:520px;border-radius:0;}
.axis-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:22px;
  background:linear-gradient(to top,rgba(5,10,20,.92),rgba(5,10,20,0));
  font-size:14px;color:var(--text-1);
}

/* 数据带 */
.stats{
  background:var(--bg-700);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:52px 0;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.stat{
  padding:8px 28px;border-left:1px solid var(--line);position:relative;
}
.stat:first-child{border-left:0;}
.stat::after{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;
  background:linear-gradient(to bottom,transparent,rgba(31,182,255,.7),transparent);
  opacity:.7;
}
.stat:first-child::after{display:none;}
.stat-num{font-size:40px;font-weight:700;color:var(--brand-glow);line-height:1.1;letter-spacing:-.02em;}
.stat-num small{font-size:16px;color:var(--text-2);margin-left:4px;font-weight:600;}
.stat-label{font-size:14px;color:var(--text-2);margin-top:8px;}

/* 错位案例 */
.case-row{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  margin-bottom:56px;
}
.case-row:last-child{margin-bottom:0;}
.case-row.reverse .case-media{order:2;}
.case-media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line-strong);
  box-shadow:var(--shadow-1);
}
.case-media img{width:100%;height:340px;border-radius:0;transition:transform .5s ease;}
.case-media:hover img{transform:scale(1.03);}
.case-tag{
  position:absolute;left:16px;top:16px;padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(5,10,20,.7);color:var(--brand-glow);border:1px solid var(--glass-brd);
  backdrop-filter:blur(10px);
}
.case-body h3{font-size:22px;font-weight:700;margin-bottom:14px;letter-spacing:-.01em;}
.case-body p{color:var(--text-2);font-size:15px;margin-bottom:18px;}
.case-facts{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.case-facts span{
  font-size:12px;padding:5px 12px;border-radius:999px;
  background:rgba(167,139,250,.14);color:var(--violet-400);border:1px solid rgba(167,139,250,.28);
}

/* 方案对比 */
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.panel{
  background:var(--bg-800);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px;transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.panel:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:var(--shadow-2);}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:8px;}
.panel h3{font-size:20px;font-weight:700;}
.panel-badge{
  font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;
  background:rgba(124,255,178,.14);color:var(--accent-400);border:1px solid rgba(124,255,178,.3);
}
.panel-badge.alt{background:rgba(31,182,255,.14);color:var(--brand-glow);border-color:rgba(31,182,255,.3);}
.panel > p{color:var(--text-2);font-size:14px;margin-bottom:20px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:11px 0;font-size:15px;color:var(--text-1);
  border-top:1px dashed var(--line);
}
.check-list li:first-child{border-top:0;}
.check-list i{color:var(--accent-400);font-size:14px;margin-top:5px;}
.panel-foot{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.news-card{
  background:var(--bg-800);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2);}
.news-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-700);}
.news-cover img{width:100%;height:100%;border-radius:0;transition:transform .5s ease;}
.news-card:hover .news-cover img{transform:scale(1.05);}
.news-cover .badge{
  position:absolute;left:14px;top:14px;padding:5px 12px;border-radius:999px;font-size:12px;
  background:rgba(5,10,20,.74);color:var(--brand-glow);border:1px solid var(--glass-brd);
  backdrop-filter:blur(8px);
}
.news-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:18px;font-weight:600;line-height:1.5;margin-bottom:10px;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a:hover{color:var(--brand-glow);}
.news-body p{
  font-size:14px;color:var(--text-2);margin-bottom:18px;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding-top:14px;font-size:13px;color:var(--text-3);
}
.news-meta i{color:var(--brand-500);transition:transform .2s ease;}
.news-meta a{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;}
.news-meta a:hover i{transform:translateX(3px);}
.empty-state{
  padding:64px 24px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius-card);
  background:rgba(255,255,255,.02);
}
.empty-state i{font-size:48px;color:var(--text-3);display:block;margin-bottom:16px;}
.empty-state p{color:var(--text-2);margin-bottom:20px;}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--glass-bg);border:1px solid var(--glass-brd);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  overflow:hidden;position:relative;transition:border-color .2s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-500);
  box-shadow:0 0 14px rgba(31,182,255,.8);transform:scaleY(0);transform-origin:top;
  transition:transform .2s ease;
}
.faq-item.open::before{transform:scaleY(1);}
.faq-item:hover{border-color:var(--line-strong);}
.faq-q{
  width:100%;background:transparent;border:0;cursor:pointer;text-align:left;
  display:flex;align-items:center;gap:16px;padding:22px 24px;
}
.faq-q .q-idx{color:var(--brand-500);font-size:15px;font-weight:700;flex-shrink:0;}
.faq-q span{flex:1;font-size:16px;font-weight:600;color:var(--text-1);}
.faq-q i{color:var(--text-2);transition:transform .2s ease;font-size:14px;}
.faq-item.open .faq-q i{transform:rotate(45deg);color:var(--accent-400);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a p{padding:0 24px 22px 62px;color:var(--text-2);font-size:15px;line-height:1.8;}

/* 联系表单 */
.contact-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;
}
.contact-info h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;margin-bottom:16px;letter-spacing:-.01em;}
.contact-info p{color:var(--text-2);font-size:15px;margin-bottom:26px;}
.contact-list li{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line);}
.contact-list li:first-child{border-top:0;}
.contact-list .ci{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;flex-shrink:0;
  background:rgba(31,182,255,.14);color:var(--brand-glow);border:1px solid rgba(31,182,255,.28);
}
.contact-list strong{display:block;font-size:15px;font-weight:600;margin-bottom:3px;}
.contact-list span{font-size:13.5px;color:var(--text-2);}
.form-panel{
  background:var(--bg-800);border:1px solid var(--line);border-radius:var(--radius-card);padding:32px;
  box-shadow:var(--shadow-1);
}
.field{margin-bottom:20px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:9px;color:var(--text-1);}
.field input,.field textarea{
  width:100%;background:var(--bg-900);border:1px solid var(--line-strong);border-radius:10px;
  padding:13px 15px;font-size:15px;color:var(--text-1);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.18);
}
.field textarea{min-height:118px;resize:vertical;}
.field.error input,.field.error textarea{border-color:var(--err);}
.field .hint{font-size:12px;color:var(--text-3);margin-top:7px;}
.field.error .hint{color:var(--err);}
.form-note{font-size:13px;color:var(--text-3);margin-top:16px;line-height:1.7;}
.form-status{
  display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:14px;
  background:rgba(53,214,164,.12);color:var(--ok);border:1px solid rgba(53,214,164,.3);
}
.form-status.show{display:block;}

/* 页脚 */
.site-footer{background:#04070F;border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px;}
.footer-brand .logo-text{color:var(--text-1);}
.footer-brand p{font-size:14px;color:var(--text-2);margin-top:16px;line-height:1.8;max-width:300px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text-1);}
.footer-col li{margin-bottom:11px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);transition:color .18s ease;}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);
}

/* 响应式 */
@media (max-width:1280px){
  .container{max-width:1200px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .burger{display:grid;place-items:center;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero{padding:72px 0 64px;}
  .axis-wrap{grid-template-columns:1fr;gap:32px;}
  .axis-figure img{height:360px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .stat:nth-child(3){border-left:0;}
  .stat:nth-child(3)::after{display:none;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .case-row{grid-template-columns:1fr;gap:24px;}
  .case-row.reverse .case-media{order:0;}
  .contact-wrap{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
  .plan-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .axis-item{grid-template-columns:48px 1fr 30px;gap:12px;padding:20px 6px;}
  .axis-num{font-size:19px;}
  .stat-num{font-size:32px;}
  .hero h1{font-size:30px;}
  .hero-actions .btn{flex:1 1 auto;}
}
@media (max-width:560px){
  .container{padding:0 20px;}
  body{font-size:15px;}
  .section{padding:48px 0;}
  .stats{padding:40px 0;}
  .stats-grid{grid-template-columns:1fr;gap:24px;}
  .stat{border-left:0;padding:0;}
  .stat::after{display:none;}
  .panel,.form-panel{padding:22px;}
  .faq-q{padding:18px 18px;}
  .faq-a p{padding:0 18px 20px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .form-panel .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
}

/* roulang page: article */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1424;
  --bg-700:#101D33;
  --brand-500:#1FB6FF;
  --brand-600:#0B7BFF;
  --brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;
  --accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;
  --text-body:#CFDCEE;
  --text-2:#9FB3CE;
  --text-3:#6B7F9B;
  --line:rgba(120,170,225,.14);
  --line-strong:rgba(150,200,255,.28);
  --glass-bg:rgba(255,255,255,.06);
  --glass-brd:rgba(150,200,255,.18);
  --nav-bg:rgba(255,255,255,.97);
  --nav-ink:#0B1A2E;
  --nav-ink-2:#4A5C74;
  --success:#35D6A4;
  --warn:#FFC24A;
  --err:#FF6B7A;
  --disabled:#3A4A63;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(11,123,255,.18);
  --shadow-glow:0 0 0 1px rgba(124,255,178,.35), 0 10px 30px -8px rgba(124,255,178,.5);
  --header-h:68px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-body);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--nav-bg);
  border-bottom:1px solid rgba(11,26,46,.08);
  box-shadow:0 1px 2px rgba(11,26,46,.06);
  backdrop-filter:blur(12px) saturate(140%);
  transition:height .22s ease,box-shadow .22s ease,background-color .22s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--header-h);
  transition:height .22s ease;
}
.site-header.is-compact{box-shadow:0 6px 22px rgba(11,26,46,.14);}
.site-header.is-compact .header-inner{height:60px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;font-size:15px;
  box-shadow:0 6px 16px rgba(11,123,255,.35);
}
.logo-text{font-size:17px;font-weight:700;color:var(--nav-ink);letter-spacing:.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1;}
.nav-links a{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--nav-ink-2);
  font-weight:500;
  border-radius:8px;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-600),var(--brand-glow));
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand-600);background:rgba(31,182,255,.08);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-600);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;
  border:1px solid rgba(11,26,46,.14);
  border-radius:999px;
  background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box i{color:var(--nav-ink-2);font-size:13px;}
.search-box input{
  border:0;outline:0;background:transparent;
  font-size:14px;color:var(--nav-ink);width:150px;
}
.search-box input::placeholder{color:#93A2B6;}
.search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.16);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:600;line-height:1;
  transition:transform .16s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent-400);color:var(--accent-ink);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(124,255,178,.5),0 16px 38px -10px rgba(124,255,178,.65);}
.btn-primary:active{transform:translateY(0);}
.btn-brand{background:linear-gradient(135deg,var(--brand-600),var(--brand-500));color:#fff;box-shadow:0 10px 26px -10px rgba(11,123,255,.7);}
.btn-brand:hover{filter:brightness(1.06);transform:translateY(-1px);}
.btn-ghost{
  background:rgba(255,255,255,.04);color:var(--text-1);
  border:1px solid var(--line-strong);
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-glow);background:rgba(31,182,255,.1);}
.btn-outline{
  background:transparent;color:var(--brand-600);border:1px solid rgba(11,123,255,.45);
}
.btn-outline:hover{background:rgba(31,182,255,.1);border-color:var(--brand-600);}
.btn-sm{height:36px;padding:0 24px;font-size:13.5px;}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-glow);font-weight:600;font-size:14.5px;}
.text-link i{transition:transform .18s ease;}
.text-link:hover i{transform:translateX(3px);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid rgba(11,26,46,.14);color:var(--nav-ink);
  align-items:center;justify-content:center;font-size:16px;
}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-900);
}
.page-hero .hero-media{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.9;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.78) 46%,rgba(5,10,20,.55) 100%);
}
.page-hero .hero-inner{position:relative;z-index:2;padding:56px 24px 46px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:20px;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand-glow);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--text-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--brand-glow);
  background:rgba(31,182,255,.12);
  border:1px solid rgba(31,182,255,.3);
  margin-bottom:18px;
}
.kicker i{font-size:11px;}
.page-hero h1{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.22;
  max-width:920px;
  color:#fff;
  text-wrap:balance;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:24px;padding-top:18px;
  border-top:1px dashed rgba(150,200,255,.24);
  font-size:13.5px;color:var(--text-2);
  max-width:920px;
}
.meta-bar span{display:inline-flex;align-items:center;gap:7px;}
.meta-bar i{color:var(--brand-500);font-size:12.5px;}
.meta-bar .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);display:inline-block;}

/* ---------- article layout ---------- */
.article-wrap{padding:64px 0 24px;background:var(--bg-900);}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:0;}
.article-shell{max-width:820px;margin:0 auto;width:100%;}
.article-intro{
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px 24px;
  margin-bottom:36px;
  box-shadow:var(--shadow-1);
}
.article-intro h2{font-size:15px;color:var(--brand-glow);letter-spacing:.04em;margin-bottom:10px;display:flex;align-items:center;gap:8px;}
.article-intro ul{display:grid;gap:8px;}
.article-intro li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-2);}
.article-intro li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.16);}

.article-body{
  font-size:16.5px;
  line-height:1.9;
  color:var(--text-body);
  letter-spacing:.005em;
}
.article-body > * + *{margin-top:1.1em;}
.article-body p{margin:0 0 1.1em;}
.article-body h2{
  font-size:clamp(20px,2vw,24px);
  line-height:1.4;
  margin:44px 0 16px;
  padding-left:14px;
  border-left:3px solid var(--brand-500);
  color:var(--text-1);
}
.article-body h3{
  font-size:18px;
  margin:32px 0 12px;
  color:var(--text-1);
  display:flex;align-items:center;gap:9px;
}
.article-body h3::before{
  content:"";width:7px;height:7px;border-radius:2px;background:var(--accent-400);
  transform:rotate(45deg);flex-shrink:0;
}
.article-body h4{font-size:16px;margin:22px 0 10px;color:var(--brand-glow);}
.article-body a{color:var(--brand-glow);border-bottom:1px solid rgba(111,219,255,.4);}
.article-body a:hover{color:#fff;border-bottom-color:#fff;}
.article-body strong{color:var(--text-1);font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;display:grid;gap:9px;}
.article-body ul li{position:relative;padding-left:22px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.14);
}
.article-body ol{counter-reset:li;}
.article-body ol li{
  position:relative;padding-left:36px;counter-increment:li;
}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-family:Inter,monospace;font-size:12.5px;font-weight:700;
  color:var(--brand-glow);
  background:rgba(31,182,255,.12);
  border:1px solid rgba(31,182,255,.28);
  border-radius:6px;padding:1px 6px;line-height:1.5;
}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  background:linear-gradient(90deg,rgba(31,182,255,.12),rgba(31,182,255,.02));
  border-left:3px solid var(--brand-500);
  border-radius:0 12px 12px 0;
  color:var(--text-1);
  font-size:15.5px;
}
.article-body img{
  border-radius:var(--radius-img);
  margin:24px auto;
  box-shadow:var(--shadow-1);
}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  margin-top:10px;text-align:center;font-size:13px;color:var(--text-3);
}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;
  font-size:14.5px;
  border:1px solid var(--line);
  border-radius:12px;overflow:hidden;
}
.article-body thead th{
  background:var(--bg-700);color:var(--text-1);
  font-weight:600;text-align:left;
}
.article-body th,.article-body td{
  padding:12px 14px;border-bottom:1px solid var(--line);
}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.025);}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body hr{
  border:0;border-top:1px dashed rgba(150,200,255,.22);margin:36px 0;
}
.article-body code{
  font-family:Inter,ui-monospace,monospace;font-size:14px;
  background:var(--bg-700);border:1px solid var(--line);
  border-radius:6px;padding:2px 6px;color:var(--brand-glow);
}

.empty-state{
  text-align:center;
  padding:64px 24px;
  background:var(--bg-800);
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
}
.empty-state i{font-size:48px;color:var(--text-3);margin-bottom:18px;display:block;}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{color:var(--text-2);font-size:14.5px;margin-bottom:24px;}

.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:44px;padding-top:26px;
  border-top:1px solid var(--line);
}

/* ---------- generic sections ---------- */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-dark{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);}
.section-head p{margin-top:10px;color:var(--text-2);font-size:14.5px;max-width:640px;}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.14em;
  color:var(--brand-500);margin-bottom:12px;
}

.panel{
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.panel:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-strong);}

.tips-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.tip-card{padding:24px;}
.tip-card .tip-num{
  font-family:Inter,monospace;font-size:12px;font-weight:700;
  color:var(--accent-400);letter-spacing:.1em;
}
.tip-card h3{font-size:18px;margin:12px 0 10px;}
.tip-card p{font-size:14.5px;color:var(--text-2);}

.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{overflow:hidden;display:flex;flex-direction:column;background:var(--bg-800);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-strong);}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-700);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.post-card:hover .post-thumb img{transform:scale(1.05);}
.badge{
  position:absolute;top:12px;left:12px;
  padding:4px 11px;border-radius:999px;
  font-size:12px;font-weight:600;
  background:rgba(5,10,20,.72);
  color:var(--brand-glow);
  border:1px solid rgba(31,182,255,.4);
  backdrop-filter:blur(6px);
}
.post-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1;}
.post-body h3{font-size:18px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px;}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);}
.post-meta i{transition:transform .18s ease;}
.post-card:hover .post-meta i{transform:translateX(3px);color:var(--brand-glow);}

/* ---------- form ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:20px;
  border:1px solid var(--line-strong);
  background:
    radial-gradient(900px 320px at 12% -10%,rgba(31,182,255,.22),transparent 60%),
    radial-gradient(700px 300px at 92% 120%,rgba(124,255,178,.16),transparent 62%),
    var(--bg-800);
  padding:48px;
}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:14px;}
.cta-inner p{color:var(--text-2);font-size:15px;margin-bottom:22px;}
.cta-list{display:grid;gap:10px;}
.cta-list li{font-size:14.5px;color:var(--text-2);display:flex;align-items:flex-start;gap:9px;}
.cta-list i{color:var(--accent-400);margin-top:5px;font-size:13px;}
.form-grid{display:grid;gap:16px;}
.field{display:grid;gap:7px;}
.field label{font-size:13.5px;color:var(--text-2);font-weight:500;}
.field input,.field textarea{
  width:100%;
  background:rgba(5,10,20,.6);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  padding:12px 14px;
  color:var(--text-1);
  font-size:14.5px;
  font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.field textarea{min-height:96px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:#5C6E88;}
.field input:focus,.field textarea:focus{
  outline:0;border-color:var(--brand-500);
  background:rgba(5,10,20,.85);
  box-shadow:0 0 0 3px rgba(31,182,255,.16);
}
.field .hint{font-size:12.5px;color:var(--text-3);}
.field.has-error input,.field.has-error textarea{border-color:var(--err);box-shadow:0 0 0 3px rgba(255,107,122,.14);}
.field.has-error .hint{color:var(--err);}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:6px;}
.form-note{font-size:12.5px;color:var(--text-3);}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;}
.faq-item{
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  border-radius:14px;
  backdrop-filter:blur(16px) saturate(150%);
  overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-q .num{font-family:Inter,monospace;font-size:12.5px;color:var(--brand-glow);}
.faq-q .plus{margin-left:auto;color:var(--brand-500);font-size:14px;transition:transform .2s ease;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a p{padding:0 22px 20px 50px;font-size:14.5px;color:var(--text-2);}
.faq-item.open{border-left:3px solid var(--brand-500);box-shadow:0 0 0 1px rgba(31,182,255,.18);}

/* ---------- footer ---------- */
.site-footer{
  background:#04080F;
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:320px;}
.footer-col h4{font-size:14.5px;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;}
.footer-bottom{
  margin-top:48px;padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 22px;}
  .nav-links a{padding:8px 9px;font-size:14px;}
  .search-box input{width:110px;}
  .tips-grid,.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  :root{--header-h:60px;}
  .container{padding:0 20px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;left:16px;right:16px;top:calc(var(--header-h) + 10px);
    flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border:1px solid rgba(11,26,46,.1);
    border-radius:16px;padding:12px;
    box-shadow:0 24px 48px rgba(11,26,46,.22);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
    margin-left:0;
    max-height:calc(100vh - 100px);overflow:auto;
  }
  .nav-links.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .nav-links a{padding:12px 14px;font-size:15px;border-radius:10px;}
  .nav-links a::after{display:none;}
  .nav-links a.active{background:rgba(31,182,255,.12);}
  .nav-links .nav-cta{display:inline-flex;margin-top:8px;justify-content:center;height:44px;}
  .search-box{display:none;}
  .header-actions .btn{height:38px;padding:0 16px;font-size:13.5px;}
  .page-hero .hero-inner{padding:36px 20px 32px;}
  .article-wrap{padding:44px 0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .tips-grid,.card-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px;border-radius:16px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .faq-a p{padding-left:22px;}
}
@media (max-width:560px){
  body{font-size:15.5px;}
  .logo-text{font-size:15.5px;}
  .header-actions .btn-secondary-hide{display:none;}
  .page-hero h1{font-size:26px;}
  .article-body{font-size:16px;line-height:1.85;}
  .section{padding:48px 0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .form-actions .btn{width:100%;}
  .meta-bar{gap:10px;font-size:13px;}
}

/* roulang page: category1 */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1424;
  --bg-700:#101D33;
  --brand-500:#1FB6FF;
  --brand-600:#0B7BFF;
  --brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;
  --accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;
  --text-2:#9FB3CE;
  --text-3:#6B7F9B;
  --ink-1:#0B1A2E;
  --ink-2:#4A5C74;
  --line:rgba(120,170,225,.14);
  --line-strong:rgba(150,200,255,.28);
  --glass-bg:rgba(255,255,255,.06);
  --glass-brd:rgba(150,200,255,.18);
  --ok:#35D6A4;
  --warn:#FFC24A;
  --err:#FF6B7A;
  --disabled:#3A4A63;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 8px 24px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(11,123,255,.18);
  --sh-glow:0 0 0 1px rgba(124,255,178,.35),0 10px 30px -8px rgba(124,255,178,.5);
  --container:1200px;
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);object-fit:cover;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}

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

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:#FFFFFF;
  border-bottom:1px solid #E6EDF6;
  box-shadow:0 1px 2px rgba(11,26,46,.06);
  transition:height .22s ease,box-shadow .22s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--nav-h);
  transition:height .22s ease;
}
.site-header.is-compact{box-shadow:0 8px 26px rgba(11,26,46,.14);}
.site-header.is-compact .header-inner{height:60px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#FFFFFF;font-size:16px;
  box-shadow:0 6px 16px rgba(11,123,255,.28);
}
.logo-text{
  font-size:18px;font-weight:700;letter-spacing:-.01em;
  color:var(--ink-1);white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  color:var(--ink-2);
  border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;border-radius:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand-600);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-600);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;
  border:1px solid #DCE6F2;
  border-radius:999px;
  background:#F7FAFE;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.search-box i{color:#8CA2BC;font-size:13px;}
.search-box input{
  border:0;background:transparent;outline:none;
  width:170px;font-size:14px;color:var(--ink-1);
}
.search-box input::placeholder{color:#93A6BC;}
.search-box:focus-within{
  border-color:var(--brand-500);
  background:#FFFFFF;
  box-shadow:0 0 0 4px rgba(31,182,255,.14);
}
.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  border:1px solid #DCE6F2;background:#F7FAFE;
  color:var(--ink-1);font-size:16px;
}
.mobile-drawer{
  display:none;
  border-top:1px solid #E6EDF6;
  background:#FFFFFF;
  padding:12px 24px 20px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;
  padding:12px 4px;
  color:var(--ink-1);
  font-size:15px;
  border-bottom:1px dashed #E6EDF6;
}
.mobile-drawer a:last-of-type{border-bottom:0;}
.mobile-drawer a.active{color:var(--brand-600);font-weight:600;}
.mobile-drawer .btn{width:100%;justify-content:center;margin-top:14px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  cursor:pointer;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent-400);
  color:var(--accent-ink);
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{
  filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(124,255,178,.45),0 16px 38px -8px rgba(124,255,178,.62);
  transform:translateY(-1px);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  color:var(--brand-glow);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{
  border-color:var(--brand-500);
  color:#FFFFFF;
  transform:translateY(-1px);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn:disabled{background:var(--disabled);color:#93A2B8;box-shadow:none;cursor:not-allowed;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-glow);
  font-size:14px;font-weight:600;
}
.link-arrow i{transition:transform .18s ease;}
.link-arrow:hover i{transform:translateX(3px);}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  background-image:linear-gradient(rgba(5,10,20,.72),rgba(5,10,20,.72)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(900px 420px at 12% 8%,rgba(31,182,255,.22),transparent 62%),
             linear-gradient(180deg,rgba(5,10,20,.2),rgba(5,10,20,.86));
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(159,179,206,.16) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.5;
  mask-image:linear-gradient(180deg,transparent,rgba(0,0,0,.9) 70%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.35fr .95fr;
  gap:48px;
  align-items:center;
  padding:88px 0 84px;
}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin-bottom:18px;
}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--brand-glow);}
.crumb span{color:var(--text-3);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border:1px solid rgba(167,139,250,.4);
  border-radius:999px;
  background:rgba(167,139,250,.12);
  color:#D7CCFF;
  font-size:12px;letter-spacing:.06em;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--accent-400);
  box-shadow:0 0 10px var(--accent-400);
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,52px);
  font-weight:700;
  line-height:1.18;
  letter-spacing:-.01em;
  color:#FFFFFF;
  margin-bottom:16px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand-glow);
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  max-width:560px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.glass-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  border-radius:var(--r-card);
  padding:26px;
  backdrop-filter:blur(16px) saturate(150%);
  box-shadow:var(--sh-1);
}
.glass-card h2{
  font-size:16px;
  font-weight:600;
  color:#FFFFFF;
  margin-bottom:16px;
  display:flex;align-items:center;gap:8px;
}
.glass-card h2 i{color:var(--accent-400);}
.glass-list li{
  display:flex;gap:10px;
  padding:10px 0;
  font-size:14px;
  color:var(--text-2);
  border-bottom:1px dashed rgba(150,200,255,.16);
}
.glass-list li:last-child{border-bottom:0;padding-bottom:0;}
.glass-list li i{color:var(--brand-500);margin-top:4px;font-size:12px;}
.glass-list strong{color:var(--text-1);font-weight:600;}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-title{
  font-size:clamp(22px,2.4vw,32px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.3;
  margin-bottom:12px;
}
.section-desc{color:var(--text-2);font-size:15px;}
.section-head-row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:44px;
}
.section-head-row .section-head{margin-bottom:0;}

/* ============ 数据带 ============ */
.facts-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.fact{
  padding:26px 24px;
  border-right:1px solid var(--line);
  position:relative;
}
.fact:last-child{border-right:0;}
.fact::before{
  content:"";
  position:absolute;left:0;top:18px;bottom:18px;width:2px;
  background:linear-gradient(180deg,var(--brand-500),transparent);
  opacity:.6;
}
.fact-num{
  display:block;
  font-size:30px;font-weight:700;
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum";
  color:var(--brand-glow);
  letter-spacing:-.02em;
  line-height:1.2;
}
.fact-label{font-size:13px;color:var(--text-3);}

/* ============ 入口卡片网格 ============ */
.entry-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.entry-card{
  display:flex;flex-direction:column;
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--sh-2);
}
.entry-card.feature{
  grid-column:span 2;
  grid-row:span 2;
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,var(--bg-700),#0E2038);
}
.card-media img{
  width:100%;height:100%;
  border-radius:0;
  transition:transform .4s ease;
}
.entry-card:hover .card-media img{transform:scale(1.04);}
.badge{
  position:absolute;top:14px;left:14px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12px;font-weight:600;
  background:rgba(5,10,20,.7);
  border:1px solid rgba(124,255,178,.35);
  color:var(--accent-400);
  backdrop-filter:blur(8px);
}
.card-body{
  padding:24px;
  display:flex;flex-direction:column;
  gap:12px;
  flex:1;
}
.card-title{
  font-size:19px;font-weight:700;
  line-height:1.4;
  color:var(--text-1);
}
.entry-card.feature .card-title{font-size:24px;}
.card-text{
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
}
.card-foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px dashed var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.card-foot .link-arrow{color:var(--brand-glow);font-size:13px;}

/* ============ 步骤 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.step{
  position:relative;
  padding:26px 22px;
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:border-color .2s ease,transform .2s ease;
}
.step:hover{border-color:var(--line-strong);transform:translateY(-3px);}
.step-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;
  background:rgba(31,182,255,.12);
  border:1px solid rgba(31,182,255,.32);
  color:var(--brand-glow);
  font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-2);}

/* ============ 适用场景 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.scene{
  padding:28px 24px;
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(16,29,51,.9),rgba(10,20,36,.9));
  border:1px solid var(--line);
}
.scene i{
  display:inline-grid;place-items:center;
  width:44px;height:44px;border-radius:12px;
  background:rgba(124,255,178,.1);
  border:1px solid rgba(124,255,178,.28);
  color:var(--accent-400);
  font-size:18px;
  margin-bottom:18px;
}
.scene h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.scene p{font-size:14px;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  border-radius:var(--r-card);
  backdrop-filter:blur(16px) saturate(150%);
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-400));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.faq-item.is-open::before{transform:scaleX(1);}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:16px;
  padding:20px 24px;
  text-align:left;
  font-size:16px;font-weight:600;
  color:var(--text-1);
}
.faq-num{
  font-size:13px;font-weight:700;
  color:var(--brand-glow);
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.faq-q .faq-text{flex:1;}
.faq-icon{
  color:var(--text-2);
  font-size:14px;
  transition:transform .2s ease,color .2s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--accent-400);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a p{
  padding:0 24px 22px 62px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.85;
}

/* ============ CTA / 表单 ============ */
.cta-panel{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
  padding:48px;
  border-radius:22px;
  border:1px solid var(--line-strong);
  background:
    radial-gradient(700px 320px at 88% 0%,rgba(31,182,255,.2),transparent 62%),
    linear-gradient(180deg,var(--bg-700),var(--bg-800));
  box-shadow:var(--sh-1);
}
.cta-panel h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  line-height:1.35;
  margin-bottom:14px;
}
.cta-panel p{color:var(--text-2);font-size:15px;margin-bottom:22px;}
.cta-points{display:flex;flex-direction:column;gap:10px;}
.cta-points li{
  display:flex;gap:10px;
  font-size:14px;color:var(--text-2);
}
.cta-points i{color:var(--accent-400);margin-top:5px;font-size:12px;}
.form-card{
  background:rgba(5,10,20,.55);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
}
.field{margin-bottom:18px;}
.field label{
  display:block;
  font-size:13px;
  color:var(--text-2);
  margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;
  padding:12px 14px;
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--text-1);
  font-size:15px;
  outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(31,182,255,.14);
}
.field textarea{min-height:104px;resize:vertical;}
.field .hint{display:block;font-size:12px;color:var(--text-3);margin-top:6px;}
.form-note{font-size:12px;color:var(--text-3);margin-top:14px;text-align:center;}

/* ============ 页脚 ============ */
.site-footer{
  background:#03070F;
  border-top:1px solid var(--line);
  padding-top:64px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand .logo-text{color:var(--text-1);}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:320px;}
.footer-col h4{
  font-size:15px;font-weight:600;
  color:var(--text-1);
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{max-width:1120px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .nav-toggle{display:inline-grid;place-items:center;}
  .header-actions{margin-left:auto;}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:64px 0 60px;}
  .section{padding:64px 0;}
  .facts-bar{grid-template-columns:repeat(2,1fr);}
  .fact:nth-child(2){border-right:0;}
  .fact:nth-child(1),.fact:nth-child(2){border-bottom:1px solid var(--line);}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .entry-card.feature{grid-column:span 2;grid-row:auto;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:768px){
  .header-inner{gap:14px;}
  .logo-text{font-size:16px;}
  .section{padding:56px 0;}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:12px;}
  .entry-grid{grid-template-columns:1fr;}
  .entry-card.feature{grid-column:span 1;}
  .steps{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .faq-a p{padding-left:24px;}
  .cta-panel{padding:28px 22px;border-radius:18px;}
}
@media (max-width:560px){
  .container{padding:0 20px;}
  .page-hero h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .section{padding:48px 0;}
  .facts-bar{grid-template-columns:1fr;}
  .fact{border-right:0;border-bottom:1px solid var(--line);}
  .fact:last-child{border-bottom:0;}
  .card-body{padding:20px;}
  .entry-card.feature .card-title{font-size:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .form-card{padding:22px;}
}

/* roulang page: category3 */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1424;
  --bg-700:#101D33;
  --brand-500:#1FB6FF;
  --brand-600:#0B7BFF;
  --brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;
  --accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;
  --text-2:#9FB3CE;
  --text-3:#6B7F9B;
  --ink-1:#0B1A2E;
  --ink-2:#4A5C74;
  --line:rgba(120,170,225,.14);
  --line-strong:rgba(120,170,225,.28);
  --glass-bg:rgba(255,255,255,.06);
  --glass-brd:rgba(150,200,255,.18);
  --success:#35D6A4;
  --warning:#FFC24A;
  --error:#FF6B7A;
  --disabled:#3A4A63;
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:14px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(11,123,255,.18);
  --shadow-cta:0 0 0 1px rgba(124,255,178,.35),0 10px 30px -8px rgba(124,255,178,.5);
  --wrap:1200px;
  --font:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background:var(--bg-900);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(30px,4.2vw,52px);font-weight:700;line-height:1.18;letter-spacing:-.01em}
h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.28;letter-spacing:-.01em}
h3{font-size:19px;font-weight:700;line-height:1.4}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
::selection{background:rgba(31,182,255,.32)}

.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 24px}}
@media(min-width:1440px){.container{max-width:1280px}}

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:#FFFFFF;
  border-bottom:1px solid rgba(11,26,46,.08);
  box-shadow:0 4px 18px rgba(11,26,46,.06);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 28px rgba(11,26,46,.14)}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:68px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  color:#fff;font-size:16px;
  box-shadow:0 6px 16px rgba(11,123,255,.28);
}
.logo-text{
  font-size:18px;font-weight:800;letter-spacing:.01em;
  color:var(--ink-1);white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav-links a{
  position:relative;
  padding:10px 12px;
  font-size:15px;font-weight:600;
  color:var(--ink-2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--brand-600);background:rgba(31,182,255,.07)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand-600)}
.nav-links a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;min-width:200px;
  border:1px solid rgba(11,26,46,.14);
  border-radius:999px;
  background:#F6F9FD;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.search-box i{color:var(--ink-2);font-size:13px}
.search-box input{
  border:0;background:transparent;outline:none;
  width:100%;font-size:14px;color:var(--ink-1);
}
.search-box input::placeholder{color:#8C9CB0}
.search-box:focus-within{
  border-color:var(--brand-500);background:#fff;
  box-shadow:0 0 0 4px rgba(31,182,255,.14);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  border-radius:var(--r-btn);
  font-weight:700;font-size:15px;
  padding:12px 22px;
  transition:transform .18s ease,background .2s ease,box-shadow .22s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{
  background:var(--accent-400);color:var(--accent-ink);
  box-shadow:var(--shadow-cta);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(124,255,178,.5),0 16px 40px -8px rgba(124,255,178,.62)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:var(--glass-bg);color:var(--brand-glow);
  border-color:var(--glass-brd);
  backdrop-filter:blur(14px) saturate(150%);
}
.btn-ghost:hover{border-color:var(--brand-500);color:#fff;background:rgba(31,182,255,.14)}
.btn-outline{
  background:transparent;color:var(--text-1);border-color:var(--line-strong);
}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-glow)}
.btn[disabled],.btn.is-disabled{background:var(--disabled);color:#93A3BA;box-shadow:none;cursor:not-allowed;transform:none}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-glow);font-weight:600;font-size:14px;
}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover i{transform:translateX(3px)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  background:#F1F5FB;border:1px solid rgba(11,26,46,.1);
  color:var(--ink-1);cursor:pointer;
}
.mobile-drawer{
  display:none;
  border-top:1px solid rgba(11,26,46,.08);
  background:#fff;padding:12px 0 20px;
}
.mobile-drawer.open{display:block}
.mobile-drawer a{
  display:block;padding:13px 0;font-size:16px;font-weight:600;
  color:var(--ink-1);border-bottom:1px solid rgba(11,26,46,.07);
}
.mobile-drawer a.active{color:var(--brand-600)}
.mobile-drawer .btn{margin-top:16px;width:100%}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  padding:96px 0 84px;
  background-color:var(--bg-900);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(105deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.78) 46%,rgba(5,10,20,.62) 100%),
    linear-gradient(180deg,rgba(5,10,20,.35),rgba(5,10,20,.9));
}
.hero::after{
  content:"";position:absolute;left:-8%;top:-30%;width:52%;height:150%;
  background:radial-gradient(ellipse at center,rgba(31,182,255,.22),transparent 66%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid var(--glass-brd);background:var(--glass-bg);
  backdrop-filter:blur(12px);
  font-size:13px;font-weight:600;color:var(--brand-glow);
  margin-bottom:20px;
}
.hero h1{color:#fff}
.hero h1 span{
  background:linear-gradient(100deg,var(--brand-glow),var(--accent-400));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  margin-top:18px;max-width:560px;
  font-size:17px;line-height:1.8;color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-card{
  border:1px solid var(--glass-brd);
  background:var(--glass-bg);
  backdrop-filter:blur(16px) saturate(150%);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow-1);
}
.hero-card h3{color:#fff;font-size:16px;letter-spacing:.02em;margin-bottom:6px}
.hero-card p{font-size:13px;color:var(--text-3);margin-bottom:18px}
.hero-card ul{display:grid;gap:14px}
.hero-card li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14px;color:var(--text-1);line-height:1.65;
}
.hero-card li i{color:var(--accent-400);margin-top:5px;font-size:13px}
.hero-metrics{
  display:flex;gap:28px;margin-top:40px;
  padding-top:24px;border-top:1px solid var(--line);
  flex-wrap:wrap;
}
.hero-metrics div strong{
  display:block;font-size:24px;color:#fff;
  font-variant-numeric:tabular-nums;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.hero-metrics div span{font-size:13px;color:var(--text-3)}

/* ---------- SECTION BASE ---------- */
.section{padding:88px 0;background:var(--bg-900)}
.section.alt{background:var(--bg-800)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head .tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand-500);
  letter-spacing:.06em;margin-bottom:14px;
}
.section-head h2{color:#fff}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px}

/* ---------- QUICK FIND ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.quick-card{
  background:var(--bg-700);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.quick-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2)}
.quick-card .ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(31,182,255,.12);color:var(--brand-glow);
  border:1px solid rgba(31,182,255,.24);margin-bottom:16px;
}
.quick-card h3{font-size:16px;color:#fff;margin-bottom:8px}
.quick-card p{font-size:14px;color:var(--text-2);line-height:1.7}
.quick-card .count{
  margin-top:16px;font-size:12px;color:var(--text-3);
  display:inline-flex;align-items:center;gap:6px;
}

/* ---------- TIMELINE ---------- */
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:27px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,rgba(31,182,255,.75),rgba(31,182,255,.18) 60%,rgba(124,255,178,.42));
  border-radius:2px;
}
.tl-item{
  position:relative;
  display:grid;grid-template-columns:56px 1fr;gap:26px;
  padding-bottom:40px;
}
.tl-item:last-child{padding-bottom:0}
.tl-node{
  width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--bg-800);
  border:1px solid var(--line-strong);
  color:var(--brand-glow);
  font-weight:800;font-size:16px;
  font-variant-numeric:tabular-nums;
  z-index:2;
  box-shadow:0 0 0 6px rgba(5,10,20,.9),0 0 22px rgba(31,182,255,.22);
}
.tl-body{
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.tl-body:hover{border-color:var(--line-strong);box-shadow:var(--shadow-2);transform:translateY(-3px)}
.tl-body h3{color:#fff;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-body h3 .badge{
  font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;
  background:rgba(167,139,250,.14);color:var(--violet-400);
  border:1px solid rgba(167,139,250,.3);
}
.tl-body p{margin-top:10px;color:var(--text-2);font-size:14.5px}
.check-list{margin-top:16px;display:grid;gap:10px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--text-1);line-height:1.7;
}
.check-list li i{color:var(--brand-500);margin-top:5px;font-size:12px}
.tl-media{margin-top:18px}
.tl-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
}
.tl-note{
  margin-top:16px;padding:14px 16px;
  border-left:3px solid var(--warning);
  background:rgba(255,194,74,.08);
  border-radius:0 10px 10px 0;
  font-size:13.5px;color:#F2D9A8;
}

/* ---------- ATTR PANEL ---------- */
.panel-wrap{
  background:var(--bg-700);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;border-bottom:1px solid var(--line);
  background:rgba(31,182,255,.05);
}
.panel-head h3{color:#fff;font-size:16px}
.panel-head span{font-size:13px;color:var(--text-3)}
.attr-row{
  display:grid;grid-template-columns:200px 1fr 130px;
  gap:20px;align-items:center;
  padding:20px 24px;border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.attr-row:last-child{border-bottom:0}
.attr-row:hover{background:rgba(31,182,255,.05)}
.attr-row .attr-key{
  font-size:14px;font-weight:700;color:var(--text-1);
  display:flex;align-items:center;gap:9px;
}
.attr-row .attr-key i{color:var(--brand-500);font-size:13px}
.attr-row .attr-val{font-size:14px;color:var(--text-2);line-height:1.7}
.attr-row .attr-stat{text-align:right}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:700;white-space:nowrap;
}
.pill-ok{background:rgba(53,214,164,.12);color:var(--success);border:1px solid rgba(53,214,164,.3)}
.pill-warn{background:rgba(255,194,74,.12);color:var(--warning);border:1px solid rgba(255,194,74,.3)}
.pill-info{background:rgba(31,182,255,.12);color:var(--brand-glow);border:1px solid rgba(31,182,255,.3)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{
  border:1px solid var(--glass-brd);
  background:var(--glass-bg);
  backdrop-filter:blur(16px) saturate(150%);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:border-color .22s ease;
}
.faq-item[open]{border-color:rgba(31,182,255,.42)}
.faq-item summary{
  display:flex;align-items:center;gap:14px;
  padding:20px 22px;cursor:pointer;list-style:none;
  position:relative;
  font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--accent-400));
  border-radius:3px;opacity:0;transition:opacity .2s ease;
}
.faq-item[open] summary::before{opacity:1}
.faq-num{
  font-size:12px;font-weight:800;color:var(--brand-glow);
  font-variant-numeric:tabular-nums;
  min-width:26px;
}
.faq-item summary .plus{
  margin-left:auto;color:var(--brand-glow);font-size:14px;
  transition:transform .2s ease;
}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-answer{
  padding:0 22px 22px 62px;
  color:var(--text-2);font-size:14.5px;line-height:1.8;
}

/* ---------- CTA / FORM ---------- */
.cta-section{
  position:relative;
  padding:88px 0;
  background-color:var(--bg-800);
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(5,10,20,.95),rgba(10,20,36,.86));
}
.cta-section .container{position:relative;z-index:2}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.cta-copy h2{color:#fff;max-width:440px}
.cta-copy p{margin-top:16px;color:var(--text-2);font-size:15.5px;max-width:460px}
.prepare{margin-top:28px;display:grid;gap:12px}
.prepare li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14.5px;color:var(--text-1);
}
.prepare li i{color:var(--accent-400);margin-top:4px;font-size:13px}
.form-card{
  background:var(--bg-700);
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow-1);
}
.form-card h3{color:#fff;font-size:18px;margin-bottom:6px}
.form-card > p{font-size:13.5px;color:var(--text-3);margin-bottom:22px}
.field{margin-bottom:18px}
.field label{
  display:block;font-size:13.5px;font-weight:600;color:var(--text-2);
  margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;
  background:var(--bg-800);
  border:1px solid var(--line-strong);
  border-radius:var(--r-input);
  padding:12px 14px;
  font-size:14.5px;color:var(--text-1);
  outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#5B6E88}
.field input:focus,.field textarea:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(31,182,255,.14);
}
.field textarea{resize:vertical;min-height:110px}
.field .hint{font-size:12px;color:var(--text-3);margin-top:6px}
.field .err{font-size:12px;color:var(--error);margin-top:6px;display:none}
.field.has-error input,.field.has-error textarea{border-color:var(--error)}
.field.has-error .err{display:block}
.form-card .btn{width:100%;margin-top:6px}

/* ---------- FOOTER ---------- */
.site-footer{
  background:#03070F;
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s ease}
.footer-col a:hover{color:var(--text-1);text-decoration:underline}
.footer-col span{font-size:14px;color:var(--text-2);line-height:1.7}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1180px){
  .nav-links{margin-left:4px}
  .nav-links a{padding:10px 9px;font-size:14px}
  .search-box{min-width:150px}
}
@media(max-width:1024px){
  .hero{padding:76px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media(max-width:900px){
  .nav-links{display:none}
  .menu-toggle{display:grid;place-items:center}
  .search-box{display:none}
}
@media(max-width:768px){
  .hero{padding:60px 0 52px}
  .hero-metrics{gap:20px}
  .attr-row{grid-template-columns:1fr;gap:8px;padding:18px 20px}
  .attr-row .attr-stat{text-align:left}
  .timeline::before{left:20px}
  .tl-item{grid-template-columns:44px 1fr;gap:16px;padding-bottom:32px}
  .tl-node{width:44px;height:44px;font-size:14px;box-shadow:0 0 0 5px rgba(5,10,20,.9)}
  .faq-answer{padding-left:22px}
  .section{padding:56px 0}
  .cta-section{padding:56px 0}
}
@media(max-width:560px){
  .quick-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .hero-actions .btn{width:100%}
  .form-card{padding:22px}
  .tl-body{padding:20px}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --bg-900:#050A14;
  --bg-800:#0A1424;
  --bg-700:#101D33;
  --brand-500:#1FB6FF;
  --brand-600:#0B7BFF;
  --brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;
  --accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;
  --text-2:#9FB3CE;
  --text-3:#6B7F9B;
  --line:rgba(120,170,225,.14);
  --glass-bg:rgba(255,255,255,.06);
  --glass-brd:rgba(150,200,255,.18);
  --ink-1:#0B1A2E;
  --ink-2:#4A5C74;
  --ink-line:#E4EAF2;
  --success:#35D6A4;
  --warning:#FFC24A;
  --error:#FF6B7A;
  --disabled:#3A4A63;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(11,123,255,.18);
  --glow-btn:0 0 0 1px rgba(124,255,178,.35),0 10px 30px -8px rgba(124,255,178,.5);
  --c-max:1200px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(31,182,255,.35);color:#fff;}

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

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:#FFFFFF;
  border-bottom:1px solid var(--ink-line);
  box-shadow:0 1px 2px rgba(11,26,46,.04);
  transition:box-shadow .25s ease,background-color .25s ease;
}
.site-header.scrolled{
  box-shadow:0 10px 28px rgba(11,26,46,.12);
  background:#FFFFFF;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:68px;
  transition:height .25s ease;
}
.site-header.scrolled .header-inner{height:60px;}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--ink-1);
  font-weight:700;
  letter-spacing:-.01em;
}
.logo-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;
  font-size:15px;
  box-shadow:0 6px 16px rgba(11,123,255,.28);
}
.logo-text{font-size:17px;}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
  flex:1 1 auto;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--ink-2);
  border-radius:8px;
  transition:color .2s ease,background-color .2s ease;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand-500);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--brand-600);background:rgba(31,182,255,.07);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-600);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 14px;
  border:1px solid var(--ink-line);
  border-radius:var(--r-pill);
  background:#F6F9FD;
  color:var(--ink-2);
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.search-box i{font-size:13px;color:var(--ink-2);}
.search-box input{
  width:132px;
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink-1);
}
.search-box input::placeholder{color:#94A3B8;}
.search-box:focus-within{
  border-color:var(--brand-500);
  background:#fff;
  box-shadow:0 0 0 3px rgba(31,182,255,.16);
}
.btn-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 18px;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;
  font-size:14.5px;
  font-weight:600;
  box-shadow:0 8px 20px rgba(11,123,255,.26);
  transition:transform .18s ease,box-shadow .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-cta:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 12px 26px rgba(11,123,255,.34);}
.btn-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--ink-line);
  color:var(--ink-1);
  font-size:17px;
  background:#fff;
}
.mobile-drawer{
  display:none;
  padding:12px 0 18px;
  border-top:1px solid var(--ink-line);
  background:#fff;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:block;
  padding:12px 4px;
  font-size:15.5px;
  color:var(--ink-2);
  border-bottom:1px dashed var(--ink-line);
}
.mobile-drawer a.active{color:var(--brand-600);font-weight:600;}
.mobile-drawer .btn-cta{
  width:100%;
  justify-content:center;
  margin-top:16px;
  height:44px;
}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  font-size:15.5px;
  font-weight:600;
  transition:transform .18s ease,box-shadow .22s ease,background-color .2s ease,border-color .2s ease,filter .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent-400);
  color:var(--accent-ink);
  box-shadow:var(--glow-btn);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(124,255,178,.5),0 16px 38px -10px rgba(124,255,178,.65);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:var(--glass-bg);
  color:var(--text-1);
  border:1px solid var(--glass-brd);
  backdrop-filter:blur(12px) saturate(150%);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-glow);transform:translateY(-1px);}
.btn-outline{
  background:transparent;
  color:var(--brand-glow);
  border:1px solid rgba(111,219,255,.34);
}
.btn-outline:hover{border-color:var(--brand-500);background:rgba(31,182,255,.1);}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand-glow);
}
.link-arrow i{transition:transform .2s ease;font-size:12px;}
.link-arrow:hover i{transform:translateX(3px);}

/* ===== Hero ===== */
.hero{
  position:relative;
  overflow:hidden;
  background-color:var(--bg-900);
  background-image:linear-gradient(105deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.82) 42%,rgba(5,10,20,.66) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle at 84% 22%,rgba(31,182,255,.22),transparent 46%),radial-gradient(circle at 12% 88%,rgba(124,255,178,.12),transparent 42%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  padding:84px 0 76px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-2);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand-glow);}
.breadcrumb .sep{opacity:.6;}
.breadcrumb .current{color:var(--text-1);}
.hero-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:44px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:rgba(31,182,255,.12);
  border:1px solid rgba(31,182,255,.3);
  color:var(--brand-glow);
  font-size:12.5px;
  letter-spacing:.04em;
  margin-bottom:20px;
}
.eyebrow i{font-size:11px;}
.hero h1{
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.18;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero h1 .hl{
  background:linear-gradient(100deg,var(--brand-glow),var(--accent-400));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  max-width:640px;
  margin-bottom:16px;
}
.hero-note{
  font-size:14.5px;
  color:var(--text-3);
  max-width:620px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

.glass-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  border-radius:var(--r-card);
  padding:26px;
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  box-shadow:var(--shadow-1);
}
.glass-card h3{
  font-size:15px;
  letter-spacing:.02em;
  color:var(--text-2);
  font-weight:600;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:8px;
}
.glass-card h3 i{color:var(--brand-glow);}
.glass-list li{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-top:1px dashed rgba(150,200,255,.16);
  font-size:14.5px;
  color:var(--text-2);
}
.glass-list li:first-child{border-top:0;padding-top:0;}
.glass-list .dot{
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:9px;
  border-radius:50%;
  background:var(--accent-400);
  box-shadow:0 0 10px rgba(124,255,178,.7);
}
.glass-list strong{color:var(--text-1);font-weight:600;}

/* ===== 板块通用 ===== */
.section{padding:88px 0;}
.section-sm{padding:64px 0;}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
  flex-wrap:wrap;
}
.section-head .label{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--brand-glow);
  margin-bottom:10px;
}
.section-head h2{
  font-size:clamp(22px,2.4vw,32px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.section-head p{
  color:var(--text-2);
  font-size:15px;
  max-width:680px;
}

/* ===== 两栏主体 ===== */
.two-col{
  display:grid;
  grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr);
  gap:32px;
  align-items:start;
}
.num-list{border-top:1px solid var(--line);}
.num-list li{
  display:flex;
  gap:20px;
  padding:22px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .22s ease,padding-left .22s ease;
}
.num-list li:hover{
  background:rgba(31,182,255,.05);
  padding-left:12px;
}
.num-list .num{
  flex:0 0 auto;
  font-family:var(--font-num);
  font-size:15px;
  font-weight:600;
  color:var(--brand-glow);
  letter-spacing:.04em;
  padding-top:3px;
  min-width:34px;
}
.num-list h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:6px;
}
.num-list p{color:var(--text-2);font-size:14.8px;}

.side-panel{position:sticky;top:96px;}
.side-nav{
  list-style:none;
  margin:0 0 20px;
}
.side-nav li+li{border-top:1px dashed rgba(150,200,255,.16);}
.side-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:12px 0;
  font-size:14.8px;
  color:var(--text-2);
  transition:color .2s ease,padding-left .2s ease;
}
.side-nav a i{font-size:12px;opacity:.7;}
.side-nav a:hover{color:var(--brand-glow);padding-left:6px;}
.side-nav a.current{color:var(--accent-400);font-weight:600;}
.side-tips{
  border-top:1px solid rgba(150,200,255,.18);
  padding-top:18px;
}
.side-tips h4{
  font-size:14px;
  color:var(--text-2);
  font-weight:600;
  margin-bottom:12px;
}
.side-tips li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  padding:7px 0;
}
.side-tips li i{
  color:var(--brand-500);
  font-size:12px;
  margin-top:7px;
}

/* ===== 差异对照卡片 ===== */
.card-grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  display:flex;
  flex-direction:column;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(111,219,255,.4);
  box-shadow:var(--shadow-2);
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-700);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
  transition:transform .35s ease;
}
.card:hover .card-media img{transform:scale(1.05);}
.badge{
  position:absolute;
  top:12px;left:12px;
  padding:4px 11px;
  border-radius:var(--r-pill);
  background:rgba(5,10,20,.72);
  border:1px solid rgba(167,139,250,.5);
  color:#D9CCFF;
  font-size:12px;
  letter-spacing:.02em;
  backdrop-filter:blur(6px);
}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card-body h3{font-size:18px;font-weight:600;line-height:1.45;}
.card-body p{color:var(--text-2);font-size:14.6px;}
.card-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px dashed var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13.5px;
  color:var(--text-3);
}

/* ===== 更新记录速览 ===== */
.record-head,.record-row{
  display:grid;
  grid-template-columns:110px 130px 120px minmax(0,1fr);
  gap:18px;
  align-items:center;
}
.record-head{
  padding:0 20px 12px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--text-3);
  border-bottom:1px solid var(--line);
}
.record-list{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--bg-800);
}
.record-row{
  padding:18px 20px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.record-row:last-child{border-bottom:0;}
.record-row:nth-child(even){background:rgba(255,255,255,.022);}
.record-row:hover{background:rgba(31,182,255,.07);}
.record-ver{
  font-family:var(--font-num);
  font-size:15px;
  font-weight:600;
  color:var(--brand-glow);
  font-variant-numeric:tabular-nums;
}
.record-date{
  font-family:var(--font-num);
  font-size:14px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:var(--r-pill);
  font-size:12px;
  border:1px solid rgba(31,182,255,.34);
  color:var(--brand-glow);
  background:rgba(31,182,255,.09);
  width:fit-content;
}
.tag.fix{border-color:rgba(53,214,164,.4);color:#8FF0D0;background:rgba(53,214,164,.1);}
.tag.ui{border-color:rgba(167,139,250,.45);color:#D6C8FF;background:rgba(167,139,250,.12);}
.tag.opt{border-color:rgba(255,194,74,.4);color:#FFDC9A;background:rgba(255,194,74,.1);}
.record-text{color:var(--text-2);font-size:14.6px;}

/* ===== 端别卡片 ===== */
.term-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.term-card{
  background:linear-gradient(180deg,rgba(16,29,51,.9),rgba(10,20,36,.9));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px 24px;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.term-card:hover{
  transform:translateY(-4px);
  border-color:rgba(111,219,255,.4);
  box-shadow:var(--shadow-2);
}
.term-icon{
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:12px;
  background:rgba(31,182,255,.12);
  border:1px solid rgba(31,182,255,.3);
  color:var(--brand-glow);
  font-size:18px;
  margin-bottom:16px;
}
.term-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.term-card p{color:var(--text-2);font-size:14.6px;margin-bottom:16px;}

/* ===== FAQ ===== */
.faq-list{
  display:grid;
  gap:14px;
  max-width:900px;
  margin:0 auto;
}
.faq-item{
  position:relative;
  border-radius:var(--r-card);
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  overflow:hidden;
  transition:border-color .22s ease,background-color .22s ease;
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:linear-gradient(180deg,var(--brand-glow),var(--accent-400));
  opacity:0;
  transition:opacity .2s ease;
}
.faq-item[open]::before{opacity:1;box-shadow:0 0 18px rgba(111,219,255,.6);}
.faq-item[open]{border-color:rgba(111,219,255,.36);background:rgba(255,255,255,.08);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:16px;
  padding:20px 22px;
  font-size:16.5px;
  font-weight:600;
  color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .idx{
  font-family:var(--font-num);
  font-size:13.5px;
  color:var(--brand-glow);
  letter-spacing:.05em;
}
.faq-item summary .plus{
  margin-left:auto;
  color:var(--text-2);
  font-size:14px;
  transition:transform .22s ease,color .22s ease;
}
.faq-item[open] summary .plus{transform:rotate(45deg);color:var(--accent-400);}
.faq-body{
  padding:0 22px 22px 54px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.9;
}

/* ===== CTA 表单 ===== */
.cta-wrap{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid var(--line);
  background-image:linear-gradient(120deg,rgba(5,10,20,.95),rgba(5,10,20,.82)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  padding:48px;
}
.cta-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:44px;
  align-items:start;
  position:relative;
  z-index:2;
}
.cta-grid h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  line-height:1.32;
  margin-bottom:14px;
}
.cta-grid .lead{color:var(--text-2);font-size:15.5px;margin-bottom:22px;}
.cta-points li{
  display:flex;
  gap:12px;
  padding:9px 0;
  font-size:14.8px;
  color:var(--text-2);
}
.cta-points i{color:var(--accent-400);font-size:13px;margin-top:8px;}
.form-panel{
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:14px;
  color:var(--text-2);
  margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;
  padding:12px 14px;
  border-radius:var(--r-btn);
  background:var(--bg-700);
  border:1px solid var(--line);
  color:var(--text-1);
  font-size:15px;
  outline:0;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(31,182,255,.16);
}
.field textarea{min-height:104px;resize:vertical;}
.field-hint{font-size:12.5px;color:var(--text-3);margin-top:6px;}
.form-panel .btn-primary{width:100%;margin-top:4px;}

/* ===== 页脚 ===== */
.site-footer{
  background:#04080F;
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand .logo{color:var(--text-1);margin-bottom:16px;}
.footer-brand p{color:var(--text-2);font-size:14.4px;max-width:330px;}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--text-1);
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  color:var(--text-2);
  font-size:14.2px;
  transition:color .2s ease;
}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;}
.footer-col span{color:var(--text-2);font-size:14.2px;line-height:1.7;display:block;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0;
  border-top:1px solid var(--line);
  color:var(--text-3);
  font-size:13.2px;
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .two-col{grid-template-columns:1fr;}
  .side-panel{position:static;}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .term-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-grid;place-items:center;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .section-sm{padding:46px 0;}
  .hero-inner{padding:60px 0 54px;}
  .search-box{display:none;}
  .header-inner{gap:14px;}
  .card-grid-3{grid-template-columns:1fr;}
  .term-grid{grid-template-columns:1fr;}
  .record-head{display:none;}
  .record-row{
    grid-template-columns:1fr 1fr;
    gap:10px 14px;
    padding:16px 18px;
  }
  .record-text{grid-column:1 / -1;}
  .cta-wrap{padding:32px 22px;}
  .container{padding:0 20px;}
}
@media (max-width:560px){
  .section{padding:48px 0;}
  .hero h1{font-size:29px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .num-list li{gap:14px;}
  .faq-body{padding-left:22px;}
  .form-panel{padding:20px;}
  .glass-card{padding:20px;}
}

/* roulang page: category4 */
:root{
  --bg-900:#050A14;--bg-800:#0A1424;--bg-700:#101D33;
  --brand-500:#1FB6FF;--brand-600:#0B7BFF;--brand-glow:#6FDBFF;
  --accent-400:#7CFFB2;--accent-ink:#04231A;
  --violet-400:#A78BFA;
  --text-1:#E8F1FF;--text-2:#9FB3CE;--text-3:#6B7F9B;
  --line:rgba(120,170,225,.14);
  --glass-bg:rgba(255,255,255,.06);--glass-brd:rgba(150,200,255,.18);
  --success:#35D6A4;--warn:#FFC24A;--danger:#FF6B7A;--disabled:#3A4A63;
  --nav-ink:#0B1A2E;--nav-ink-2:#4A5C74;--nav-line:#E6EDF6;
  --r-card:16px;--r-btn:10px;--r-input:10px;--r-img:14px;--r-pill:999px;
  --sh-1:0 8px 24px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(11,123,255,.18);
  --sh-glow:0 0 0 1px rgba(124,255,178,.35),0 10px 30px -8px rgba(124,255,178,.5);
  --max:1200px;--gap:24px;
  --font:"-apple-system",BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,Arial,sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--text-1);background:var(--bg-900);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,textarea{font:inherit;color:inherit}
button{background:none;border:none;cursor:pointer}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
[hidden]{display:none !important}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
@media(min-width:1440px){:root{--max:1280px}}
@media(max-width:560px){.container{padding:0 20px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--nav-line);box-shadow:0 1px 0 rgba(11,26,46,.03),0 6px 18px rgba(11,26,46,.06);transition:box-shadow .25s ease}
.header-inner{max-width:var(--max);margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;gap:22px;transition:height .25s ease}
.site-header.shrink{box-shadow:0 2px 0 rgba(11,26,46,.04),0 12px 28px rgba(11,26,46,.14)}
.site-header.shrink .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:#fff;font-size:16px;background:linear-gradient(135deg,var(--brand-500),var(--brand-600));box-shadow:0 6px 16px -6px rgba(11,123,255,.75)}
.logo-text{font-size:18px;font-weight:700;letter-spacing:-.01em;color:var(--nav-ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:8px}
.nav-links a{position:relative;padding:9px 2px;font-size:15px;color:var(--nav-ink-2);transition:color .2s ease;white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:center;transition:transform .22s ease}
.nav-links a:hover{color:var(--brand-600)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand-600);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--r-pill);background:#F4F8FD;border:1px solid #E3EBF5;transition:border-color .2s,box-shadow .2s}
.search-box i{color:var(--nav-ink-2);font-size:14px}
.search-box input{border:none;background:transparent;outline:none;width:170px;font-size:14px;color:var(--nav-ink)}
.search-box input::placeholder{color:#93A3B8}
.search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.16)}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--nav-line);color:var(--nav-ink);align-items:center;justify-content:center;font-size:17px;background:#F7FAFE}
.menu-toggle:hover{border-color:var(--brand-500);color:var(--brand-600)}
.mobile-drawer{display:none}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;cursor:pointer}
.btn i{font-size:13px}
.btn-primary{background:var(--accent-400);color:var(--accent-ink);box-shadow:var(--sh-glow)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(124,255,178,.5),0 16px 38px -10px rgba(124,255,178,.6)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(124,255,178,.35),0 6px 16px -8px rgba(124,255,178,.5)}
.btn-primary:disabled,.btn-primary.is-disabled{background:var(--disabled);color:#8FA2BD;box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;border-color:var(--glass-brd);color:var(--text-1);backdrop-filter:blur(12px)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-glow);transform:translateY(-1px)}
.btn-outline{background:rgba(31,182,255,.08);border-color:rgba(31,182,255,.45);color:var(--brand-glow)}
.btn-outline:hover{background:rgba(31,182,255,.16);border-color:var(--brand-500)}
.btn-sm{padding:10px 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--brand-glow)}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover i{transform:translateX(3px)}
.text-link{color:var(--brand-glow);border-bottom:1px solid rgba(111,219,255,.4);transition:border-color .2s,color .2s}
.text-link:hover{color:#fff;border-color:#fff}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background-image:linear-gradient(180deg,rgba(5,10,20,.74),rgba(5,10,20,.9)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 420px at 8% 12%,rgba(31,182,255,.26),transparent 62%),radial-gradient(620px 340px at 88% 88%,rgba(167,139,250,.18),transparent 66%);pointer-events:none}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(180deg,transparent,rgba(5,10,20,.92));pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .85fr;gap:48px;align-items:center;padding-top:88px;padding-bottom:88px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:var(--r-pill);font-size:13px;color:var(--brand-glow);background:rgba(31,182,255,.12);border:1px solid rgba(31,182,255,.32)}
.hero h1{margin-top:20px;font-size:clamp(30px,4.2vw,52px);line-height:1.18;letter-spacing:-.01em;font-weight:700}
.hero-sub{margin-top:16px;font-size:clamp(15px,1.5vw,18px);color:var(--text-2);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;font-size:13px;color:var(--text-3)}
.hero-meta li{display:inline-flex;align-items:center;gap:7px}
.hero-meta i{color:var(--brand-500)}
.glass-card{background:var(--glass-bg);border:1px solid var(--glass-brd);border-radius:var(--r-card);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);padding:26px;box-shadow:var(--sh-1)}
.hero-panel .panel-title{font-size:14px;font-weight:600;color:var(--brand-glow);letter-spacing:.04em}
.stat-list{margin-top:18px;display:grid;gap:14px}
.stat-list li{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px dashed var(--line)}
.stat-list li:last-child{border-bottom:none;padding-bottom:0}
.stat-num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--accent-400);font-variant-numeric:tabular-nums}
.stat-label{font-size:14px;color:var(--text-2)}
.panel-note{margin-top:20px;font-size:13px;color:var(--text-3);line-height:1.7}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section-alt{background:linear-gradient(180deg,rgba(16,29,51,.72),rgba(5,10,20,0))}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.4vw,32px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.section-desc{margin-top:12px;font-size:15px;color:var(--text-2);max-width:640px}
.section-head .link-arrow{flex:0 0 auto;padding-bottom:4px}

/* ---------- filter + notice wall ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{padding:9px 18px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--bg-800);color:var(--text-2);font-size:14px;transition:border-color .2s,color .2s,background .2s,box-shadow .2s,transform .2s}
.chip:hover{border-color:var(--brand-500);color:var(--text-1);transform:translateY(-1px)}
.chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 10px 24px -10px rgba(11,123,255,.85)}
.chip:active{transform:translateY(1px)}
.notice-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.notice-card{display:flex;flex-direction:column;background:var(--bg-800);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.notice-card:hover{transform:translateY(-4px);border-color:rgba(31,182,255,.45);box-shadow:var(--sh-2)}
.notice-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#0d1b30,#132a45)}
.notice-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.notice-card:hover .notice-thumb img{transform:scale(1.05)}
.badge{position:absolute;top:12px;left:12px;padding:5px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;letter-spacing:.02em;background:rgba(6,14,28,.74);border:1px solid var(--glass-brd);color:var(--brand-glow);backdrop-filter:blur(8px)}
.badge.is-version{color:#C7B7FF;border-color:rgba(167,139,250,.4)}
.badge.is-activity{color:var(--accent-400);border-color:rgba(124,255,178,.38)}
.badge.is-service{color:#FFD68A;border-color:rgba(255,194,74,.36)}
.notice-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
.notice-body h3{font-size:17px;line-height:1.45;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.notice-summary{font-size:14px;color:var(--text-2);line-height:1.7;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.notice-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3)}
.notice-foot i{transition:transform .2s ease}
.notice-card:hover .notice-foot i{transform:translateX(3px);color:var(--brand-glow)}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;padding:64px 24px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);background:rgba(10,20,36,.6)}
.empty-state i{font-size:48px;color:var(--text-3)}
.empty-state p{font-size:15px;color:var(--text-2)}

/* ---------- points ---------- */
.point-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.point-card{background:var(--bg-800);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;transition:border-color .25s,transform .25s,box-shadow .25s}
.point-card:hover{border-color:rgba(31,182,255,.4);transform:translateY(-4px);box-shadow:var(--sh-2)}
.point-num{font-family:var(--mono);font-size:14px;font-weight:700;color:var(--brand-500);letter-spacing:.08em}
.point-card h3{margin-top:14px;font-size:18px;font-weight:600;line-height:1.4}
.point-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.72}

/* ---------- scenario ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.scene-card{background:var(--bg-800);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;display:grid;gap:16px}
.scene-card h3{font-size:19px;font-weight:600;display:flex;align-items:center;gap:10px}
.scene-card h3 i{color:var(--brand-500);font-size:16px}
.scene-list{display:grid;gap:12px}
.scene-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.scene-list li i{color:var(--accent-400);font-size:12px;margin-top:7px;flex:0 0 auto}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);counter-reset:step}
.step{position:relative;padding:26px 22px;border-radius:var(--r-card);background:linear-gradient(180deg,rgba(16,29,51,.9),rgba(10,20,36,.9));border:1px solid var(--line)}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;top:-14px;left:22px;font-family:var(--mono);font-size:13px;font-weight:700;padding:4px 10px;border-radius:var(--r-pill);background:var(--bg-900);border:1px solid rgba(31,182,255,.45);color:var(--brand-glow)}
.step h3{margin-top:8px;font-size:17px;font-weight:600}
.step p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.7}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{position:relative;background:var(--glass-bg);border:1px solid var(--glass-brd);border-radius:14px;backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 56px 18px 24px;font-size:16px;font-weight:600;position:relative;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand-500);box-shadow:0 0 14px var(--brand-500);transform:scaleY(0);transition:transform .2s ease}
.faq-item summary::after{content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;right:24px;top:50%;transform:translateY(-50%) rotate(0deg);font-size:13px;color:var(--brand-glow);transition:transform .2s ease}
.faq-item[open] summary{color:#fff}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item summary:hover{color:var(--brand-glow)}
.faq-body{padding:0 24px 20px 24px;font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ---------- cta / form ---------- */
.cta-wrap{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);background-image:linear-gradient(180deg,rgba(5,10,20,.86),rgba(5,10,20,.94)),url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;padding:48px}
.cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.cta-copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3}
.cta-copy p{margin-top:14px;font-size:15px;color:var(--text-2)}
.cta-list{margin-top:22px;display:grid;gap:12px}
.cta-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2)}
.cta-list i{color:var(--accent-400);font-size:12px;margin-top:7px}
.form-card{background:rgba(10,20,36,.86);border:1px solid var(--glass-brd);border-radius:var(--r-card);padding:26px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:14px;color:var(--text-2)}
.field input,.field textarea{width:100%;background:var(--bg-800);border:1px solid var(--line);border-radius:var(--r-input);padding:12px 14px;font-size:14.5px;color:var(--text-1);transition:border-color .2s,box-shadow .2s}
.field input::placeholder,.field textarea::placeholder{color:#5C7191}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(31,182,255,.16)}
.field textarea{resize:vertical;min-height:108px}
.field-hint{font-size:12px;color:var(--text-3)}
.form-actions{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.form-note{font-size:12.5px;color:var(--text-3)}

/* ---------- footer ---------- */
.site-footer{background:#04080F;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .logo-mark{background:linear-gradient(135deg,var(--brand-500),var(--brand-600))}
.footer-brand .logo-text{color:var(--text-1);font-size:17px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);transition:color .2s}
.footer-col a:hover{color:var(--text-1);text-decoration:underline}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:var(--text-3)}

/* ---------- responsive ---------- */
@media(max-width:1100px){
  .search-box{display:none}
  .notice-grid{grid-template-columns:repeat(2,1fr)}
  .point-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px;padding-top:64px;padding-bottom:64px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .scene-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-links,.header-actions .btn{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{gap:14px}
  .mobile-drawer{display:block;position:fixed;left:16px;right:16px;top:76px;z-index:90;background:#fff;border-radius:16px;border:1px solid var(--nav-line);box-shadow:0 24px 60px rgba(11,26,46,.22);padding:16px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s ease,transform .2s ease,visibility .2s}
  .mobile-drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
  .mobile-drawer a{display:block;padding:12px 14px;border-radius:12px;font-size:15px;color:var(--nav-ink-2)}
  .mobile-drawer a:hover{background:#F2F7FE;color:var(--brand-600)}
  .mobile-drawer a.active{background:#EAF4FF;color:var(--brand-600);font-weight:600}
  .mobile-drawer .btn{width:100%;margin-top:12px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-wrap{padding:28px 20px}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media(max-width:560px){
  .notice-grid{grid-template-columns:1fr}
  .point-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .section{padding:48px 0}
  .hero h1{font-size:30px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .form-actions .btn{width:100%}
  .stat-num{font-size:22px}
}