/* roulang page: index */
:root{
  --c-primary:#0e5cf6;
  --c-primary-dark:#0a3bb5;
  --c-primary-soft:#eaf1ff;
  --c-accent:#f9583e;
  --c-accent-dark:#d9432a;
  --c-accent-soft:#ffedea;
  --c-bg:#f6f8fc;
  --c-surface:#ffffff;
  --c-text:#0d1b2a;
  --c-text-2:#42546b;
  --c-text-3:#7c8aa0;
  --c-border:#e3e9f2;
  --radius-md:14px;
  --radius-lg:22px;
  --radius-pill:999px;
  --shadow-sm:0 4px 14px rgba(13,27,42,.06);
  --shadow-md:0 10px 30px rgba(13,27,42,.08);
  --shadow-lg:0 22px 55px rgba(13,27,42,.13);
  --sp-1:8px;--sp-2:14px;--sp-3:24px;--sp-4:40px;--sp-5:64px;--sp-6:88px;
  --r-lg:22px;
  --font-main:"PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Segoe UI",system-ui,-apple-system,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-main);background:var(--c-bg);color:var(--c-text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
body.no-scroll{overflow:hidden}
a{text-decoration:none;color:inherit;transition:color .25s}
img{max-width:100%;display:block;border:0}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:var(--sp-5) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--c-primary-soft);color:var(--c-primary);font-weight:600;font-size:13px;padding:6px 15px;border-radius:var(--radius-pill);letter-spacing:.3px;margin-bottom:12px}
.eyebrow i{font-size:12px}
.section-title{font-size:32px;line-height:1.25;font-weight:700;letter-spacing:-.5px}
.section-sub{color:var(--c-text-2);font-size:15px;margin-top:8px;max-width:680px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:var(--radius-pill);font-weight:600;transition:all .25s;border:0;font-size:15px;height:48px;padding:0 28px;letter-spacing:.2px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 22px rgba(14,92,246,.26)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:0 12px 28px rgba(14,92,246,.34)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 8px 22px rgba(249,88,62,.26)}
.btn-accent:hover{background:var(--c-accent-dark);transform:translateY(-2px);box-shadow:0 12px 28px rgba(249,88,62,.34)}
.btn-light{background:#fff;color:var(--c-text);box-shadow:var(--shadow-sm)}
.btn-light:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.btn-lg{height:54px;padding:0 36px;font-size:16px}
.btn:focus-visible,.card:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid rgba(14,92,246,.35);outline-offset:2px}
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--c-primary-soft);color:var(--c-primary);border-radius:var(--radius-pill);padding:4px 13px;font-size:12px;font-weight:600}
.badge-orange{background:var(--c-accent-soft);color:var(--c-accent)}
.badge-green{background:#e5f7ed;color:#0f9d58}
.section-white{background:#fff}
.site-header{background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);position:sticky;top:0;z-index:200;border-bottom:1px solid rgba(227,233,242,.7)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.logo{font-size:19px;font-weight:800;letter-spacing:-.3px;display:flex;align-items:center;gap:10px;line-height:1.2}
.logo-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),#3d82ff);display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;box-shadow:0 6px 18px rgba(14,92,246,.28);flex:0 0 auto}
.logo-text b{color:var(--c-primary)}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:var(--radius-pill);font-weight:500;font-size:15px;color:var(--c-text-2);transition:all .2s}
.nav-links a:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.nav-links a.active{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(14,92,246,.25)}
.header-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);font-size:19px;border:0}
.mobile-panel{display:none;position:fixed;top:0;right:-100%;width:310px;height:100vh;background:#fff;z-index:300;box-shadow:var(--shadow-lg);flex-direction:column;padding:30px 28px;transition:right .35s ease;overflow-y:auto}
.mobile-panel.open{right:0}
.mobile-panel .close-icon{align-self:flex-end;width:40px;height:40px;border-radius:10px;background:var(--c-bg);display:flex;align-items:center;justify-content:center;border:0;font-size:17px;color:var(--c-text);margin-bottom:22px}
.mobile-panel a{display:flex;align-items:center;gap:10px;padding:14px 8px;border-bottom:1px solid var(--c-border);font-weight:500;font-size:16px;color:var(--c-text-2)}
.mobile-panel a.active{color:var(--c-primary);font-weight:700}
.mobile-panel .panel-btn{margin-top:20px}
.panel-backdrop{position:fixed;inset:0;background:rgba(13,27,42,.5);z-index:250;opacity:0;visibility:hidden;transition:.3s}
.panel-backdrop.open{opacity:1;visibility:visible}
.hero{position:relative;background:linear-gradient(135deg,var(--c-primary) 0%,#2e6eff 60%,#5592ff 100%);color:#fff;padding:96px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.28}
.hero::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 80% 30%,rgba(255,255,255,.16) 0%,transparent 55%)}
.hero .container{position:relative;z-index:5}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);padding:7px 18px;border-radius:var(--radius-pill);font-size:13px;font-weight:600;margin-bottom:24px;backdrop-filter:blur(8px)}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-1px;margin-bottom:18px}
.hero h1 span{background:linear-gradient(90deg,#fff,#cfe0ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:17px;opacity:.92;margin-bottom:30px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.hero-stats{display:flex;gap:36px;flex-wrap:wrap;padding-top:26px;border-top:1px solid rgba(255,255,255,.2)}
.stat-item .num{font-size:30px;font-weight:800;letter-spacing:-.5px}
.stat-item .label{font-size:13px;opacity:.82}
.hero-visual{position:relative;display:flex;justify-content:center}
.hero-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);border-radius:28px;padding:28px;backdrop-filter:blur(14px);width:100%;max-width:390px;box-shadow:0 25px 55px rgba(2,20,60,.28)}
.phone-ui{background:rgba(255,255,255,.1);border-radius:18px;padding:14px;display:flex;align-items:center;gap:14px;margin-bottom:16px}
.phone-ui:last-child{margin-bottom:0}
.pui-icon{width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:17px;flex:0 0 auto}
.pui-text .t{font-size:15px;font-weight:600;line-height:1.3}
.pui-text .d{font-size:12px;opacity:.75}
.hero-badge-float{position:absolute;top:-16px;right:0;display:flex;align-items:center;gap:8px;background:#fff;color:var(--c-text);padding:10px 18px;border-radius:var(--radius-pill);font-size:13px;font-weight:600;box-shadow:var(--shadow-lg)}
.hero-badge-float i{color:var(--c-accent)}
.intro-card{background:#fff;border-radius:var(--r-lg);padding:38px;box-shadow:var(--shadow-sm);border:1px solid var(--c-border);display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;align-items:center}
.intro-card img{border-radius:16px}
.intro-copy h2{font-size:27px;margin-bottom:14px;font-weight:700}
.intro-copy p{color:var(--c-text-2);margin-bottom:15px}
.flow-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}
.flow-step{position:relative;background:var(--c-bg);border-radius:18px;padding:26px 22px;border:1px solid var(--c-border)}
.flow-step .step-num{width:38px;height:38px;background:var(--c-primary);color:#fff;border-radius:11px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;margin-bottom:16px}
.flow-step h3{font-size:17px;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--c-text-2)}
.category-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.category-card{position:relative;background:#fff;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--c-border);transition:transform .3s,box-shadow .3s;display:block}
.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.category-cover{position:relative;aspect-ratio:16/9;overflow:hidden}
.category-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.category-card:hover .category-cover img{transform:scale(1.04)}
.category-cover::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(13,20,35,.45))}
.category-body{position:absolute;bottom:0;left:0;right:0;padding:20px;color:#fff;z-index:2}
.category-body .cat-tag{background:rgba(255,255,255,.2);padding:4px 12px;border-radius:var(--radius-pill);font-size:12px;display:inline-flex;align-items:center;gap:6px;backdrop-filter:blur(6px)}
.category-body h3{font-size:21px;margin-top:10px;font-weight:700}
.category-body p{font-size:14px;opacity:.9;margin-top:5px}
.category-info{position:absolute;top:16px;right:16px;background:#fff;border-radius:var(--radius-pill);padding:6px 14px;font-size:13px;font-weight:600;color:var(--c-primary);box-shadow:var(--shadow-sm);z-index:3}
.list-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
.list-header h2{font-size:28px;font-weight:700}
.list-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px}
.post-list{display:flex;flex-direction:column;gap:16px}
.post-item{background:#fff;border-radius:16px;border:1px solid var(--c-border);padding:20px 22px;display:flex;gap:18px;align-items:flex-start;transition:box-shadow .25s,transform .25s}
.post-item:hover{box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.post-rank{font-size:18px;font-weight:800;color:var(--c-primary);min-width:36px;height:36px;background:var(--c-primary-soft);border-radius:10px;display:flex;align-items:center;justify-content:center}
.post-rank.top1{background:var(--c-accent);color:#fff}
.post-rank.top2{background:#ff9d45;color:#fff}
.post-rank.top3{background:#35a772;color:#fff}
.post-content{flex:1;min-width:0}
.post-title{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:6px}
.post-title a:hover{color:var(--c-primary)}
.post-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--c-text-3);flex-wrap:wrap}
.post-meta i{margin-right:4px}
.feature-panel{background:linear-gradient(135deg,#0d1b2a,#12293f);color:#fff;border-radius:22px;padding:28px;display:flex;flex-direction:column;gap:18px;box-shadow:var(--shadow-md)}
.feature-panel h3{font-size:20px;margin-bottom:6px}
.f-item{display:flex;gap:14px;align-items:flex-start}
.f-item i{width:38px;height:38px;border-radius:12px;background:var(--c-primary);display:flex;align-items:center;justify-content:center;flex:0 0 auto;font-size:15px}
.f-item .tx strong{display:block;font-size:15px;margin-bottom:4px}
.f-item .tx p{font-size:13px;opacity:.78}
.hot-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.hot-list li{display:flex;align-items:center;gap:12px;font-size:14px;padding:10px 12px;background:rgba(255,255,255,.05);border-radius:12px;transition:background .2s}
.hot-list li:hover{background:rgba(255,255,255,.1)}
.hot-list li i{color:var(--c-accent);font-size:12px}
.data-band{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:50px 0}
.data-item{text-align:center}
.data-item .dnum{font-size:42px;font-weight:800;color:var(--c-primary);letter-spacing:-1px;line-height:1.2}
.data-item .dnum em{font-style:normal;font-size:19px;font-weight:600}
.data-item .dlab{font-size:14px;color:var(--c-text-2);margin-top:8px;position:relative;padding-top:12px}
.data-item .dlab::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:24px;height:3px;border-radius:2px;background:var(--c-primary-soft)}
.feature-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border-radius:19px;border:1px solid var(--c-border);padding:28px 24px;box-shadow:var(--shadow-sm);transition:all .3s}
.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.feature-card .fc-icon{width:52px;height:52px;border-radius:14px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:18px}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--c-text-2);line-height:1.7}
.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.platform-card{background:#fff;border:1px solid var(--c-border);border-radius:18px;padding:22px;text-align:center;transition:all .3s}
.platform-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.platform-card i{font-size:32px;color:var(--c-primary);width:64px;height:64px;border-radius:18px;background:var(--c-primary-soft);display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.platform-card h3{font-size:16px;font-weight:600;margin-bottom:8px}
.platform-card p{font-size:13px;color:var(--c-text-3);margin-bottom:14px}
.frame-tag{display:inline-flex;align-items:center;gap:6px;font-size:11px;background:var(--c-accent-soft);color:var(--c-accent);border-radius:var(--radius-pill);padding:3px 10px;font-weight:600}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-item{background:#fff;border:1px solid var(--c-border);border-radius:16px;padding:22px 24px;transition:box-shadow .25s}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-item h3{font-size:16px;margin-bottom:8px;display:flex;gap:10px;align-items:flex-start}
.faq-item h3 i{color:var(--c-primary);margin-top:4px}
.faq-item p{font-size:14px;color:var(--c-text-2);margin-left:24px}
.cta-band{background:linear-gradient(135deg,var(--c-primary) 0%,#2b6ff0 60%,#4a8bff 100%);border-radius:26px;padding:54px 50px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;inset:0;opacity:.18}
.cta-band .container-in{position:relative;z-index:2;display:flex;width:100%;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta-copy h2{font-size:30px;font-weight:800;margin-bottom:10px}
.cta-copy p{opacity:.9;font-size:15px}
.site-footer{background:#0d1b2a;color:#c8d3e2;padding-top:62px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1.4fr;gap:42px;padding-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;opacity:.7;line-height:1.8;max-width:300px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:600}
.footer-col ul li{margin-bottom:11px;font-size:14px}
.footer-col ul li a{opacity:.72;transition:all .2s}
.footer-col ul li a:hover{opacity:1;color:#fff;padding-left:4px}
.footer-contact li{display:flex;gap:10px;align-items:baseline;font-size:14px;margin-bottom:12px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#7e8aa0}
.float-actions{position:fixed;right:26px;bottom:26px;display:flex;flex-direction:column;gap:10px;z-index:210}
.float-btn{width:48px;height:48px;border-radius:50%;background:#fff;box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;font-size:17px;color:var(--c-primary);transition:all .25s;border:1px solid var(--c-border)}
.float-btn:hover{background:var(--c-primary);color:#fff;transform:translateY(-3px)}
.mobile-nav-fixed{display:none}
@media(max-width:1024px){
  .hero h1{font-size:38px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-visual{max-width:460px;margin:0 auto;width:100%}
  .nav-links{display:none}
  .nav-toggle{display:flex;align-items:center;justify-content:center}
  .header-cta .btn{display:none}
  .list-grid{grid-template-columns:1fr}
  .category-grid{grid-template-columns:1fr}
  .feature-cards{grid-template-columns:1fr 1fr}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .intro-card{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:1fr 1fr}
  .faq-grid{grid-template-columns:1fr}
  .flow-steps{grid-template-columns:1fr}
}
@media(max-width:768px){
  .section{padding:44px 0}
  .container{padding-left:18px;padding-right:18px}
  .section-title{font-size:26px}
  .hero{padding:64px 0 58px}
  .hero h1{font-size:31px}
  .hero p{font-size:15px}
  .cta-band{padding:38px 26px}
  .cta-copy h2{font-size:24px}
  .feature-cards{grid-template-columns:1fr}
  .data-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .mobile-panel{display:flex}
  .float-actions{bottom:80px}
}
@media(max-width:520px){
  .hero-stats{flex-direction:column;gap:18px}
  .platform-grid{grid-template-columns:1fr}
  .category-info{display:none}
  .post-item{padding:16px}
  .post-title{font-size:15px}
  .data-item .dnum{font-size:32px}
  .btn{height:46px;padding:0 22px;font-size:14px}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center}
}

/* roulang page: article */
:root {
  --primary: #1a5eff;
  --primary-dark: #0f46c8;
  --primary-light: #e8f0ff;
  --primary-glow: rgba(26, 94, 255, .22);
  --accent: #ff6b35;
  --accent-glow: rgba(255, 107, 53, .18);
  --dark: #0c1426;
  --dark-2: #131f38;
  --bg: #f4f7fc;
  --surface: #fff;
  --text: #182338;
  --text-light: #5e6e8c;
  --border: #dde5f2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 14px rgba(12, 20, 38, .06);
  --shadow: 0 10px 34px rgba(12, 20, 38, .10);
  --shadow-hover: 0 18px 46px rgba(12, 20, 38, .14);
  --nav-h: 74px;
  --font: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 6px 26px rgba(12,20,38,.08); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px;
  box-shadow: 0 4px 14px var(--primary-glow);
}
.logo-text { font-size: 18px; font-weight: 600; color: var(--text); letter-spacing: .02em; white-space: nowrap; }
.logo-text strong { color: var(--primary); font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  display: flex; align-items: center; gap: 7px;
  padding: 9px 16px; border-radius: 99px;
  font-size: 14.5px; font-weight: 500; color: var(--text-light);
  transition: all .25s ease; position: relative;
}
.nav-links a i { font-size: 13.5px; opacity: .85; }
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.header-cta { display: flex; align-items: center; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 99px; padding: 10px 22px;
  font-size: 14.5px; font-weight: 600; border: none;
  transition: all .25s ease; line-height: 1.4;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 6px 20px var(--primary-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(26,94,255,.32); }
.btn-ghost { background: transparent; border: 1.5px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.nav-toggle { display: none; background: transparent; border: none; font-size: 22px; color: var(--text); padding: 8px; }

/* ===== Hero ===== */
.article-hero {
  position: relative; padding: 76px 0 88px;
  background: linear-gradient(135deg, #0b1222 0%, #16233f 50%, #0e1b33 100%);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  color: #fff; overflow: hidden;
}
.article-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(8,14,28,.85) 20%, rgba(18,32,58,.72) 70%, rgba(20,44,88,.6));
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13.5px; color: rgba(255,255,255,.68); margin-bottom: 28px; }
.breadcrumb a { color: rgba(255,255,255,.82); transition: color .2s; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { opacity: .5; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.22);
  border-radius: 99px; padding: 5px 14px; font-size: 12.5px; font-weight: 500;
  margin-bottom: 18px; backdrop-filter: blur(6px);
}
.hero-tag i { color: #ffd166; }
.article-hero h1 { font-size: 36px; line-height: 1.35; font-weight: 700; max-width: 820px; letter-spacing: .01em; text-shadow: 0 2px 20px rgba(0,0,0,.25); }
.hero-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 22px; font-size: 13.5px; color: rgba(255,255,255,.72); }
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta i { color: rgba(255,255,255,.55); }

/* ===== 文章主体 ===== */
.article-main { position: relative; margin-top: -44px; padding-bottom: 70px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 34px; align-items: start; }
.article-card {
  background: var(--surface); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
  border: 1px solid rgba(221,229,242,.8);
}
.article-cover { position: relative; aspect-ratio: 16 / 8; overflow: hidden; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.article-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(8,14,28,.25)); }
.article-body { padding: 44px 48px 54px; }
.article-body h2 { font-size: 24px; font-weight: 700; margin: 34px 0 16px; padding-left: 15px; border-left: 4px solid var(--primary); line-height: 1.4; }
.article-body h3 { font-size: 19px; font-weight: 600; margin: 28px 0 12px; color: var(--dark); }
.article-body p { font-size: 15.5px; color: #2c3a55; margin-bottom: 18px; line-height: 1.85; }
.article-body ul, .article-body ol { margin: 0 0 20px; padding-left: 24px; }
.article-body li { font-size: 15.5px; color: #2c3a55; margin-bottom: 8px; line-height: 1.8; }
.article-body li::marker { color: var(--primary); font-weight: 600; }
.article-body blockquote {
  margin: 24px 0; padding: 18px 24px; border-radius: 12px;
  background: var(--primary-light); border-left: 4px solid var(--primary);
  font-size: 15px; color: #34405a; font-style: normal;
}
.article-body blockquote p { margin-bottom: 0; }
.article-body img { border-radius: var(--radius-md); box-shadow: var(--shadow-sm); margin: 20px auto; }
.article-body table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 14.5px; border-radius: var(--radius-sm); overflow: hidden; box-shadow: var(--shadow-sm); }
.article-body th, .article-body td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.article-body th { background: var(--dark); color: #fff; font-weight: 600; }
.article-body td { background: var(--surface); }
.article-body tr:last-child td { border-bottom: none; }
.article-footer {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 14px; padding: 22px 48px 40px;
  border-top: 1px solid var(--border);
}
.article-tags { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.tag { display: inline-flex; align-items: center; gap: 6px; background: var(--primary-light); color: var(--primary); border-radius: 99px; padding: 5px 14px; font-size: 12.5px; font-weight: 500; transition: all .2s; }
.tag:hover { background: var(--primary); color: #fff; }
.article-share { display: flex; align-items: center; gap: 8px; }
.share-btn { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 14px; transition: all .2s; }
.share-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); transform: translateY(-2px); }

/* ===== 侧边栏 ===== */
.sidebar { display: flex; flex-direction: column; gap: 26px; position: sticky; top: calc(var(--nav-h) + 20px); }
.sidebar-widget { background: var(--surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid rgba(221,229,242,.75); padding: 28px 26px; }
.sidebar-widget h3 { font-size: 17px; font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.sidebar-widget h3::after { content: ''; position: absolute; left: 0; bottom: 0; width: 36px; height: 3px; border-radius: 3px; background: var(--primary); }
.widget-label { display: inline-flex; align-items: center; gap: 6px; background: var(--primary-light); color: var(--primary); padding: 4px 12px; border-radius: 99px; font-size: 12px; font-weight: 600; margin-bottom: 12px; }
.widget-info { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; margin-bottom: 18px; background: var(--bg); }
.widget-info-item { display: flex; align-items: center; justify-content: space-between; font-size: 13px; padding: 7px 0; border-bottom: 1px dashed var(--border); }
.widget-info-item:last-child { border-bottom: 0; }
.widget-info-item .k { color: var(--text-light); }
.widget-info-item .v { font-weight: 600; color: var(--text); }
.sidebar-list { list-style: none; }
.sidebar-list li { display: flex; align-items: flex-start; gap: 12px; padding: 11px 0; border-bottom: 1px dashed var(--border); transition: background .2s; }
.sidebar-list li:last-child { border-bottom: 0; }
.sidebar-list li:hover { background: #f8fbff; }
.sidebar-list .num { width: 26px; height: 26px; border-radius: 8px; background: var(--primary-light); color: var(--primary); font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.sidebar-list .title { font-size: 14px; line-height: 1.45; color: var(--text); transition: color .2s; }
.sidebar-list li:hover .title { color: var(--primary); }
.sidebar-list .date { font-size: 12px; color: var(--text-light); display: block; margin-top: 3px; }
.widget-card-banner {
  border-radius: var(--radius-md); overflow: hidden; position: relative;
  background: linear-gradient(135deg, var(--dark), #1b2d4e); color: #fff;
  padding: 26px 24px; text-align: center;
}
.widget-card-banner .b-icon { font-size: 34px; color: #ffd166; margin-bottom: 12px; }
.widget-card-banner p { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,.85); margin-bottom: 16px; }
.widget-card-banner .btn { width: 100%; }

/* ===== 相关文章 ===== */
.related-section { padding: 72px 0 40px; }
.section-head { text-align: center; margin-bottom: 42px; }
.section-head .sub-label { display: inline-flex; align-items: center; gap: 6px; background: var(--primary-light); color: var(--primary); border-radius: 99px; padding: 5px 16px; font-size: 13px; font-weight: 600; margin-bottom: 14px; }
.section-head h2 { font-size: 30px; font-weight: 700; letter-spacing: .01em; }
.section-head p { color: var(--text-light); font-size: 15px; margin-top: 10px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.related-card {
  background: var(--surface); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid rgba(221,229,242,.75);
  transition: all .3s ease; display: flex; flex-direction: column;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.related-card .rc-img { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.related-card .rc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .rc-img img { transform: scale(1.05); }
.related-card .rc-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.related-card .rc-cat { display: inline-block; font-size: 12px; color: var(--primary); background: var(--primary-light); border-radius: 99px; padding: 3px 12px; font-weight: 600; margin-bottom: 12px; width: fit-content; }
.related-card h3 { font-size: 16.5px; line-height: 1.5; font-weight: 600; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color .2s; }
.related-card:hover h3 { color: var(--primary); }
.related-card .rc-meta { margin-top: auto; font-size: 12.5px; color: var(--text-light); display: flex; align-items: center; gap: 14px; padding-top: 14px; border-top: 1px solid var(--border); }

/* ===== FAQ ===== */
.faq-section { padding: 80px 0; background: var(--dark); background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; background-attachment: fixed; }
.faq-section .section-head h2 { color: #fff; }
.faq-section .section-head p { color: rgba(255,255,255,.6); }
.faq-section .sub-label { background: rgba(26,94,255,.25); color: #8db3ff; }
.faq-grid { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-md); overflow: hidden;
  transition: background .3s;
}
.faq-item summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 19px 24px; font-size: 15.5px; font-weight: 600; color: #fff; transition: background .2s; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); font-size: 16px; transition: transform .3s; }
.faq-item[open] summary { background: rgba(26,94,255,.15); }
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 24px 20px; color: rgba(255,255,255,.72); font-size: 14.5px; line-height: 1.85; }

/* ===== CTA ===== */
.cta-section { padding: 64px 0; }
.cta-card {
  border-radius: var(--radius-lg); overflow: hidden; position: relative;
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff; padding: 52px 56px; text-align: center;
  box-shadow: 0 16px 46px var(--primary-glow);
}
.cta-card::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: .12; }
.cta-card h2 { font-size: 28px; font-weight: 700; margin-bottom: 10px; position: relative; }
.cta-card p { font-size: 15.5px; color: rgba(255,255,255,.85); max-width: 600px; margin: 0 auto 28px; position: relative; }
.cta-card .btn-white { background: #fff; color: var(--primary); border-radius: 99px; padding: 12px 30px; font-weight: 600; display: inline-flex; align-items: center; gap: 8px; font-size: 15px; position: relative; transition: all .25s; box-shadow: 0 6px 20px rgba(0,0,0,.16); }
.cta-card .btn-white:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,.24); }

/* ===== 页脚 ===== */
.site-footer { background: var(--dark); color: rgba(255,255,255,.75); padding: 68px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 42px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.75; color: rgba(255,255,255,.58); max-width: 340px; }
.footer-col h4 { font-size: 15.5px; font-weight: 700; color: #fff; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 26px; height: 2px; background: var(--primary); }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 11px; font-size: 14px; }
.footer-col a { color: rgba(255,255,255,.65); transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 13.5px; color: rgba(255,255,255,.6); }
.footer-contact li i { margin-top: 4px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding: 22px 0; font-size: 13px; color: rgba(255,255,255,.42); }

/* ===== 未找到 ===== */
.not-found-box { text-align: center; padding: 80px 40px; }
.not-found-box .nf-icon { width: 76px; height: 76px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 30px; margin: 0 auto 24px; }
.not-found-box h2 { font-size: 26px; margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 24px; }

/* ===== 移动端 ===== */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: minmax(0, 1fr) 290px; gap: 22px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .header-cta .btn { display: none; }
  .nav-links.open { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; background: #fff; padding: 18px 24px; box-shadow: var(--shadow); border-radius: 0 0 var(--radius-lg) var(--radius-lg); z-index: 99; gap: 6px; }
  .nav-links.open a { padding: 13px 16px; border-radius: var(--radius-sm); justify-content: flex-start; font-size: 15px; }
  .article-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; gap: 18px; }
  .sidebar-widget { flex: 1 1 46%; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .logo-text { font-size: 16px; }
  .article-hero { padding: 52px 0 60px; }
  .article-hero h1 { font-size: 26px; }
  .article-body { padding: 28px 22px 36px; }
  .article-footer { padding: 18px 22px 28px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-card { padding: 38px 24px; }
  .cta-card h2 { font-size: 23px; }
  .sidebar { display: flex; flex-direction: column; }
  .sidebar-widget { width: 100%; }
  .not-found-box { padding: 50px 20px; }
  .section-head h2 { font-size: 25px; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #2a6df4;
  --primary-dark: #1745b0;
  --primary-light: #5b96ff;
  --accent: #ff6b35;
  --accent-light: #ff9a6b;
  --bg: #f4f6fb;
  --bg-deep: #0d1630;
  --card: #ffffff;
  --text: #182236;
  --text-weak: #6b7a99;
  --border: #e3e9f4;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(20, 40, 80, 0.06);
  --shadow-md: 0 12px 32px rgba(20, 40, 80, 0.10);
  --shadow-lg: 0 24px 56px rgba(20, 40, 80, 0.16);
  --container: 1200px;
  --space-section: 84px;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ========== 基础 Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
  border: none;
  outline: none;
}

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

/* ========== Header 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(227, 233, 244, 0.8);
  box-shadow: 0 2px 20px rgba(20, 40, 80, 0.05);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(42, 109, 244, 0.28);
}

.logo-text {
  font-size: 18px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.logo-text strong {
  color: var(--primary);
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  color: var(--text-weak);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
}

.nav-links a i {
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--primary);
  background: rgba(42, 109, 244, 0.08);
}

.nav-links a.active {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 6px 18px rgba(42, 109, 244, 0.28);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(42, 109, 244, 0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(42, 109, 244, 0.35);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.btn-light:hover {
  background: #f0f4ff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.nav-toggle:hover {
  background: rgba(42, 109, 244, 0.1);
  color: var(--primary);
}

/* ========== Hero ========== */
.cat-hero {
  position: relative;
  padding: 96px 0 88px;
  background: linear-gradient(135deg, rgba(10, 20, 50, 0.93), rgba(25, 55, 115, 0.78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.cat-hero::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -20px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(42, 109, 244, 0.22);
  filter: blur(60px);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

.hero-breadcrumb a:hover {
  color: #fff;
}

.hero-breadcrumb i {
  font-size: 12px;
}

.cat-hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.cat-hero h1 span {
  color: var(--primary-light);
}

.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.hero-badge i {
  color: var(--accent-light);
}

/* ========== 特性卡片 ========== */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(42, 109, 244, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 14px;
}

.section-sub {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(42, 109, 244, 0.1), rgba(42, 109, 244, 0.04));
  color: var(--primary);
  font-size: 24px;
  margin-bottom: 22px;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ========== 赛事卡片网格 ========== */
.event-grid-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.event-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.event-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.event-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
}

.event-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.event-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.event-card:hover .event-cover img {
  transform: scale(1.05);
}

.event-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.28), transparent 60%);
}

.event-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.event-tag i {
  font-size: 11px;
}

.event-info {
  padding: 22px 22px 24px;
}

.event-info h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.event-info p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 18px;
}

.event-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.event-meta span {
  font-size: 13px;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 6px;
}

.event-meta a {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.event-meta a:hover {
  color: var(--primary-dark);
  gap: 8px;
}

/* ========== 排行列表 ========== */
.ranking-section {
  background: var(--bg-deep);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.ranking-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(42, 109, 244, 0.25);
  filter: blur(80px);
}

.ranking-wrap {
  position: relative;
  z-index: 2;
}

.ranking-section .section-title {
  color: #fff;
}

.ranking-section .section-sub {
  color: rgba(255, 255, 255, 0.7);
}

.ranking-section .section-tag {
  background: rgba(91, 150, 255, 0.16);
  color: var(--primary-light);
}

.ranking-list {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 12px 20px;
  backdrop-filter: blur(8px);
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.25s ease;
}

.rank-item:last-child {
  border-bottom: none;
}

.rank-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 10px;
}

.rank-num {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.1);
  color: var(--primary-light);
  flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-num {
  background: rgba(255, 107, 53, 0.25);
  color: var(--accent-light);
}

.rank-item:nth-child(2) .rank-num {
  background: rgba(91, 150, 255, 0.25);
  color: var(--primary-light);
}

.rank-item:nth-child(3) .rank-num {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.rank-info {
  flex: 1;
  min-width: 0;
}

.rank-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-bar {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
  max-width: 280px;
}

.rank-bar span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

.rank-heat {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-light);
  white-space: nowrap;
}

/* ========== 数据统计 ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  text-align: center;
  padding: 36px 20px;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
  font-family: "DIN Alternate", "PingFang SC", var(--font);
}

.stat-card p {
  font-size: 15px;
  color: var(--text-weak);
  font-weight: 500;
}

/* ========== 流程步骤 ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.step-card {
  position: relative;
  text-align: center;
  padding: 40px 30px;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.step-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 8px 22px rgba(42, 109, 244, 0.3);
}

.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

.step-line {
  position: absolute;
  top: 68px;
  right: -30px;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), transparent);
}

.step-card:last-child .step-line {
  display: none;
}

/* ========== FAQ ========== */
.faq-section {
  background: #fff;
  border-top: 1px solid var(--border);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: background 0.25s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '\f078';
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--text-weak);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-item[open] summary {
  background: rgba(42, 109, 244, 0.03);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin: 0 20px;
  padding-top: 16px;
  padding-left: 4px;
  padding-right: 4px;
}

/* ========== CTA ========== */
.cta-section {
  padding: 84px 0;
  background: linear-gradient(135deg, rgba(10, 20, 50, 0.94), rgba(20, 50, 110, 0.85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
}

.cta-content {
  max-width: 620px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ========== Footer ========== */
.site-footer {
  background: #0c1322;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.8fr 1.1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col h4 {
  font-size: 16px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all 0.25s ease;
}

.footer-col ul li a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-contact li i {
  width: 20px;
  text-align: center;
  color: var(--primary-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ========== 响应式断点 ========== */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .event-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 56px;
  }

  .container {
    padding: 0 18px;
  }

  .nav-wrap {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 18px 18px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 32px rgba(20, 40, 80, 0.1);
    display: none;
    border-radius: 0 0 18px 18px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    justify-content: center;
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 12px;
  }

  .nav-links a i {
    display: none;
  }

  .header-cta .btn {
    display: none;
  }

  .cat-hero {
    padding: 72px 0 64px;
  }

  .cat-hero h1 {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .event-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }

  .section-title {
    font-size: 26px;
  }

  .ranking-list {
    padding: 8px 12px;
  }

  .rank-item {
    gap: 12px;
    padding: 16px 8px;
  }

  .rank-num {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .rank-bar {
    max-width: 120px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .stat-num {
    font-size: 30px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .step-line {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-content h2 {
    font-size: 26px;
  }
}

@media (max-width: 520px) {
  .cat-hero h1 {
    font-size: 26px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section-title {
    font-size: 23px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat-card {
    padding: 24px 14px;
  }

  .stat-num {
    font-size: 26px;
  }

  .rank-bar {
    display: none;
  }

  .event-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .faq-item summary {
    font-size: 15px;
    padding: 16px 18px;
  }

  .faq-answer {
    font-size: 14px;
    padding: 14px 0 18px;
    margin: 0 16px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

/* roulang page: category2 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #60a5fa;
  --accent: #f59e0b;
  --accent-soft: #fef3c7;
  --dark: #0b1220;
  --dark-2: #101b30;
  --dark-3: #1a2744;
  --bg: #f5f8ff;
  --bg-light: #ffffff;
  --text: #172033;
  --muted: #5b6b83;
  --border: #e2e9f4;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 8px;
  --shadow: 0 8px 26px rgba(15, 23, 42, .08);
  --shadow-lg: 0 22px 56px rgba(15, 23, 42, .14);
  --shadow-blue: 0 12px 32px rgba(37, 99, 235, .26);
  --transition: all .3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
button, input { font-family: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 18, 32, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  box-shadow: 0 4px 22px rgba(0, 0, 0, .24);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 42px; height: 42px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  border-radius: 12px; color: #fff; font-size: 20px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, .35);
}
.logo-text { font-size: 17px; font-weight: 600; color: #fff; letter-spacing: .5px; white-space: nowrap; }
.logo-text strong { color: #7da7ff; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  display: flex; align-items: center; gap: 7px;
  padding: 9px 17px; border-radius: 999px;
  color: rgba(255, 255, 255, .78); font-size: 14.5px; font-weight: 500;
  transition: var(--transition); border: 1px solid transparent;
}
.nav-links a i { font-size: 13px; }
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.nav-links a.active {
  color: #fff; background: var(--primary); border-color: rgba(96, 165, 250, .4);
  box-shadow: 0 6px 18px rgba(37, 99, 235, .32);
}
.header-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; border-radius: 999px; cursor: pointer; transition: var(--transition); }
.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff; padding: 10px 22px; font-size: 14px;
  box-shadow: 0 8px 22px rgba(37, 99, 235, .3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(37, 99, 235, .42); color: #fff; }
.btn-outline {
  border: 1.5px solid rgba(255, 255, 255, .5); color: #fff;
  padding: 10px 22px; font-size: 14px; background: transparent;
}
.btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, .1); color: #fff; }
.btn-light { background: #fff; color: var(--primary-dark); padding: 11px 26px; font-size: 14.5px; box-shadow: 0 8px 24px rgba(0, 0, 0, .1); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(0, 0, 0, .16); color: var(--primary-dark); }
.nav-toggle { display: none; background: rgba(255, 255, 255, .1); color: #fff; width: 42px; height: 42px; border-radius: 12px; font-size: 18px; cursor: pointer; align-items: center; justify-content: center; }

/* ===== Page Hero ===== */
.page-hero {
  position: relative; overflow: hidden;
  background: var(--dark) url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  color: #fff; padding: 92px 0 84px;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(11, 18, 32, .92) 10%, rgba(11, 18, 32, .72) 55%, rgba(30, 58, 138, .55));
}
.page-hero::after {
  content: ""; position: absolute; right: -120px; bottom: -160px; width: 420px; height: 420px;
  border-radius: 50%; background: radial-gradient(circle, rgba(59, 130, 246, .30), transparent 70%);
}
.hero-inner { position: relative; z-index: 2; max-width: 780px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245, 158, 11, .14); border: 1px solid rgba(245, 158, 11, .45);
  color: #fbbf24; font-size: 13px; font-weight: 600;
  padding: 6px 15px; border-radius: 999px; margin-bottom: 20px;
}
.hero-badge i { font-size: 12px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, .6); margin-bottom: 16px; }
.breadcrumb a:hover { color: #7da7ff; }
.breadcrumb .sep { opacity: .5; }
.hero-title { font-size: 42px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; margin-bottom: 14px; }
.hero-title span { color: #7da7ff; }
.hero-sub { font-size: 17px; color: rgba(255, 255, 255, .78); max-width: 620px; margin-bottom: 30px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 42px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 28px; padding-top: 26px; border-top: 1px solid rgba(255, 255, 255, .14); }
.stat-item .stat-num { font-size: 28px; font-weight: 800; color: #7da7ff; line-height: 1.2; }
.stat-item .stat-label { font-size: 13px; color: rgba(255, 255, 255, .65); }

/* ===== Section base ===== */
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 50px; }
.section-tag { display: inline-block; background: rgba(37, 99, 235, .1); color: var(--primary); font-size: 13px; font-weight: 600; padding: 5px 16px; border-radius: 999px; margin-bottom: 12px; }
.section-title { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 12px; letter-spacing: .5px; }
.section-sub { color: var(--muted); font-size: 15.5px; line-height: 1.8; }

/* ===== Features ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-light); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px 28px;
  box-shadow: var(--shadow); transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::after {
  content: ""; position: absolute; top: 0; right: 0; width: 100px; height: 100px;
  border-radius: 0 0 0 100%; background: rgba(37, 99, 235, .04);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(37, 99, 235, .2); }
.feature-card:hover::after { background: rgba(37, 99, 235, .1); width: 130px; height: 130px; }
.feature-icon {
  width: 62px; height: 62px; display: flex; align-items: center; justify-content: center;
  border-radius: 16px; font-size: 24px; color: #fff; margin-bottom: 22px;
  background: linear-gradient(135deg, #3b82f6, #1e40af); box-shadow: var(--shadow-blue);
}
.feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, #f59e0b, #d97706); box-shadow: 0 10px 26px rgba(245, 158, 11, .28); }
.feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #10b981, #047857); box-shadow: 0 10px 26px rgba(16, 185, 129, .28); }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--muted); font-size: 14.5px; line-height: 1.75; }

/* ===== Steps Section (dark) ===== */
.steps-section { background: var(--dark); position: relative; overflow: hidden; color: #fff; }
.steps-section::before {
  content: ""; position: absolute; inset: 0;
  background: url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity: .12;
}
.steps-section .container { position: relative; z-index: 2; }
.steps-section .section-tag { background: rgba(245, 158, 11, .12); color: #fbbf24; }
.steps-section .section-title { color: #fff; }
.steps-section .section-sub { color: rgba(255, 255, 255, .6); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step-item {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-lg); padding: 30px 24px; text-align: center;
  transition: var(--transition); position: relative;
}
.step-item:hover { background: rgba(255, 255, 255, .09); transform: translateY(-4px); border-color: rgba(96, 165, 250, .3); }
.step-num {
  width: 52px; height: 52px; margin: 0 auto 18px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3b82f6, #2563eb); border-radius: 50%;
  font-size: 20px; font-weight: 800; box-shadow: 0 8px 22px rgba(37, 99, 235, .4);
}
.step-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step-item p { font-size: 13.5px; color: rgba(255, 255, 255, .62); line-height: 1.7; }

/* ===== Tips Cards ===== */
.tips-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.tip-card {
  display: flex; gap: 20px; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow); transition: var(--transition);
}
.tip-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: rgba(37, 99, 235, .18); }
.tip-thumb { width: 120px; height: 120px; flex-shrink: 0; border-radius: var(--radius); overflow: hidden; }
.tip-thumb img { width: 100%; height: 100%; object-fit: cover; }
.tip-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.tip-tag { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; color: var(--primary); background: rgba(37, 99, 235, .08); padding: 3px 10px; border-radius: 999px; margin-bottom: 8px; width: fit-content; }
.tip-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.tip-body p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.tip-link { margin-top: 10px; font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 5px; }
.tip-link:hover { gap: 9px; color: var(--primary-dark); }

/* ===== Hot List ===== */
.hot-section { background: var(--bg-light); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.hot-wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.hot-list { display: flex; flex-direction: column; gap: 14px; }
.hot-item {
  display: flex; align-items: center; gap: 16px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 20px;
  transition: var(--transition); position: relative;
}
.hot-item:hover { background: #fff; box-shadow: var(--shadow); transform: translateX(6px); border-color: rgba(37, 99, 235, .2); }
.hot-rank {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: 10px; background: rgba(37, 99, 235, .08); color: var(--primary);
  font-weight: 800; font-size: 15px; flex-shrink: 0;
}
.hot-item:first-child .hot-rank { background: var(--accent); color: #fff; box-shadow: 0 6px 16px rgba(245, 158, 11, .35); }
.hot-info { flex: 1; min-width: 0; }
.hot-info h3 { font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-bottom: 2px; }
.hot-info p { font-size: 12.5px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hot-badge { font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 999px; flex-shrink: 0; }
.hot-badge.hot { background: #fee2e2; color: #dc2626; }
.hot-badge.new { background: #dcfce7; color: #16a34a; }
.hot-badge.trend { background: var(--accent-soft); color: #d97706; }
.hot-note { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); position: relative; }
.hot-note img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
.hot-note-overlay {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 28px; background: linear-gradient(to top, rgba(11, 18, 32, .85), transparent 65%); color: #fff;
}
.hot-note-overlay .tag { font-size: 12px; background: rgba(245, 158, 11, .9); color: #fff; padding: 4px 12px; border-radius: 999px; width: fit-content; margin-bottom: 10px; font-weight: 700; }
.hot-note-overlay h3 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
.hot-note-overlay p { font-size: 13px; color: rgba(255, 255, 255, .72); }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
}
.faq-item:hover { border-color: rgba(37, 99, 235, .25); box-shadow: var(--shadow); }
.faq-question {
  width: 100%; background: none; display: flex; align-items: center; justify-content: space-between;
  padding: 19px 24px; font-size: 15.5px; font-weight: 600; color: var(--text); cursor: pointer; text-align: left;
}
.faq-question i { font-size: 13px; color: var(--primary); transition: transform .3s ease; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .4s ease; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { font-size: 14px; color: var(--muted); line-height: 1.8; }

/* ===== CTA ===== */
.cta-section {
  position: relative; overflow: hidden; text-align: center; padding: 84px 0;
  background: var(--dark) url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  color: #fff;
}
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(11, 18, 32, .78); }
.cta-inner { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-size: 34px; font-weight: 800; margin-bottom: 14px; line-height: 1.3; }
.cta-inner p { font-size: 16px; color: rgba(255, 255, 255, .75); margin-bottom: 30px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: #0b1220; color: rgba(255, 255, 255, .68); padding: 66px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 42px; }
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand p { font-size: 13.5px; line-height: 1.85; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15.5px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 13.5px; color: rgba(255, 255, 255, .6); }
.footer-col ul li a:hover { color: #7da7ff; }
.footer-contact li { display: flex; align-items: center; gap: 9px; font-size: 13.5px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0; display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, .45);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 36px; }
  .features-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .hot-wrap { grid-template-columns: 1fr; }
  .hot-note img { min-height: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 26px; }
  .nav-wrap { height: 64px; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--dark-2); flex-direction: column; align-items: stretch;
    padding: 18px 24px; gap: 10px; border-bottom: 1px solid rgba(255, 255, 255, .08);
    transform: translateY(-120%); opacity: 0; pointer-events: none;
    transition: var(--transition); box-shadow: 0 24px 48px rgba(0, 0, 0, .4);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 16px; border-radius: 12px; }
  .nav-links a.active { background: var(--primary); }
  .page-hero { padding: 68px 0 60px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .hero-stats { gap: 20px; }
  .stat-item .stat-num { font-size: 23px; }
  .features-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .tip-card { flex-direction: row; }
  .tip-thumb { width: 100px; height: 100px; }
  .cta-inner h2 { font-size: 27px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .logo-text { font-size: 15px; }
  .logo-mark { width: 36px; height: 36px; font-size: 17px; border-radius: 10px; }
  .header-cta .btn-primary { padding: 8px 14px; font-size: 13px; }
  .nav-links { top: 60px; }
  .hero-title { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .steps-grid { grid-template-columns: 1fr; }
  .tip-card { flex-direction: column; }
  .tip-thumb { width: 100%; height: 160px; }
  .hot-item { padding: 14px 14px; gap: 12px; }
  .hot-info p { display: none; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}