/* roulang page: index */
:root {
  --primary: #1e5eff;
  --primary-dark: #1642c4;
  --primary-light: #4d82ff;
  --accent: #00b8d9;
  --accent-dark: #0098b8;
  --dark: #0b1220;
  --dark-2: #121c30;
  --dark-3: #1d2a45;
  --bg: #f4f7fc;
  --bg-deep: #e8eef7;
  --surface: #ffffff;
  --text: #172033;
  --text-body: #3e4a5f;
  --text-weak: #8592a9;
  --border: #e6ebf3;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(10,20,40,0.05);
  --shadow-md: 0 10px 32px rgba(10,20,40,0.08);
  --shadow-lg: 0 18px 48px rgba(10,20,40,0.13);
  --space-section: 92px;
  --container: 1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .25s ease}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4,h5{line-height:1.3;font-weight:700;letter-spacing:-.01em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-tag{display:inline-block;padding:7px 18px;background:rgba(30,94,255,.09);color:var(--primary);border-radius:100px;font-size:13px;font-weight:600;letter-spacing:.05em;margin-bottom:16px;border:1px solid rgba(30,94,255,.14)}
.section-head h2{font-size:34px;margin-bottom:12px;color:var(--dark)}
.section-head p{color:var(--text-body);font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 30px;border-radius:100px;font-weight:600;font-size:15px;border:none;transition:all .3s ease;line-height:1.4;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 20px rgba(30,94,255,.3)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 30px rgba(30,94,255,.35)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--dark);box-shadow:0 6px 20px rgba(0,0,0,.1)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.15)}
.btn-lg{padding:15px 42px;font-size:17px}
/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);box-shadow:0 1px 0 rgba(0,0,0,.04),0 8px 30px rgba(10,20,40,.05)}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--dark);letter-spacing:-.02em;flex-shrink:0}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:900;box-shadow:0 4px 14px rgba(30,94,255,.3)}
.header-search{display:flex;flex:0 1 340px;align-items:center;background:var(--bg-deep);border-radius:100px;height:42px;padding:0 6px 0 18px;border:1px solid var(--border);transition:border-color .3s,box-shadow .3s}
.header-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,94,255,.12)}
.header-search input{border:none;background:transparent;outline:none;flex:1;font-size:14px;color:var(--text)}
.header-search button{width:80px;height:34px;border-radius:100px;background:var(--primary);color:#fff;border:none;font-size:13px;font-weight:600;transition:background .3s}
.header-search button:hover{background:var(--primary-dark)}
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;background:var(--bg-deep);border:1px solid var(--border);align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:all .3s;content:'';position:relative}
.menu-toggle span::before{position:absolute;top:-6px;left:0}
.menu-toggle span::after{position:absolute;top:6px;left:0}
.menu-toggle.active span{background:transparent}
.menu-toggle.active span::before{top:0;transform:rotate(45deg)}
.menu-toggle.active span::after{top:0;transform:rotate(-45deg)}
.main-nav{display:flex;align-items:center;gap:6px;padding:0 0 12px;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{padding:9px 20px;border-radius:100px;font-size:14px;font-weight:600;color:var(--text-body);transition:all .3s;white-space:nowrap;position:relative}
.main-nav a:hover{color:var(--primary);background:rgba(30,94,255,.06)}
.main-nav a.active{color:var(--primary);background:rgba(30,94,255,.1)}
.main-nav .nav-trend{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-weak);padding:0 8px}
.main-nav .nav-trend .hot-key{background:var(--bg-deep);padding:4px 12px;border-radius:100px;font-size:12px;color:var(--text-body);cursor:pointer;transition:all .3s;white-space:nowrap}
.main-nav .nav-trend .hot-key:hover{background:rgba(30,94,255,.1);color:var(--primary)}
/* Hero */
.hero{position:relative;min-height:600px;display:flex;align-items:center;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;overflow:hidden}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(118deg,rgba(10,18,38,.88) 0%,rgba(10,18,38,.65) 45%,rgba(30,94,255,.35) 100%);}
.hero .container{position:relative;z-index:2}
.hero-content{max-width:680px;padding:80px 0}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);color:#fff;padding:8px 18px;border-radius:100px;font-size:13px;font-weight:600;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:#34f5c5;box-shadow:0 0 10px #34f5c5}
.hero h1{font-size:48px;color:#fff;margin-bottom:20px;line-height:1.2;font-weight:800}
.hero h1 .highlight{background:linear-gradient(120deg,var(--accent),#5b8cff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{color:rgba(255,255,255,.82);font-size:17px;line-height:1.8;margin-bottom:36px;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-bottom:48px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;padding-top:4px}
.hero-stats .stat-item{text-align:left}
.hero-stats .stat-num{font-size:28px;font-weight:800;color:#fff;line-height:1.2}
.hero-stats .stat-label{font-size:13px;color:rgba(255,255,255,.65);margin-top:2px}
.hero-stats .stat-item + .stat-item{border-left:1px solid rgba(255,255,255,.2);padding-left:36px}
/* Features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--surface);border-radius:var(--radius-lg);padding:40px 32px;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all .35s cubic-bezier(.2,.75,.3,1)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(30,94,255,.2)}
.feature-icon{width:60px;height:60px;border-radius:18px;background:linear-gradient(135deg,var(--primary-light),var(--primary));display:flex;align-items:center;justify-content:center;margin-bottom:22px;font-size:24px;color:#fff;box-shadow:0 8px 24px rgba(30,94,255,.25)}
.feature-card:nth-child(2) .feature-icon{background:linear-gradient(135deg,var(--accent),var(--accent-dark));box-shadow:0 8px 24px rgba(0,184,217,.25)}
.feature-card:nth-child(3) .feature-icon{background:linear-gradient(135deg,#7c5cff,#5b3fd4);box-shadow:0 8px 24px rgba(124,92,255,.25)}
.feature-card h3{font-size:19px;margin-bottom:10px;color:var(--dark)}
.feature-card p{font-size:14px;color:var(--text-body);line-height:1.75}
/* Categories */
.categories{background:var(--bg-deep)}
.categories-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.category-card{background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all .35s cubic-bezier(.2,.75,.3,1)}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.category-cover{position:relative;height:200px;overflow:hidden}
.category-cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.category-card:hover .category-cover img{transform:scale(1.05)}
.category-cover::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(10,18,38,.45))}
.category-badge{position:absolute;top:16px;left:16px;background:rgba(255,255,255,.92);color:var(--primary);font-size:13px;font-weight:700;padding:5px 14px;border-radius:100px;z-index:2;box-shadow:var(--shadow-sm)}
.category-body{padding:26px 26px 30px}
.category-body h3{font-size:19px;margin-bottom:8px;color:var(--dark)}
.category-body p{font-size:14px;color:var(--text-body);margin-bottom:18px;line-height:1.75}
.category-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.category-link span{transition:transform .3s}
.category-link:hover span{transform:translateX(4px)}
.category-link:hover{color:var(--primary-dark)}
/* Latest */
.latest-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.latest-card{display:flex;flex-direction:column;background:var(--surface);border-radius:var(--radius-md);padding:26px 28px;border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:all .3s ease;position:relative;overflow:hidden}
.latest-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);opacity:0;transition:opacity .3s}
.latest-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(30,94,255,.25)}
.latest-card:hover::before{opacity:1}
.latest-card-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.latest-tag{background:rgba(30,94,255,.1);color:var(--primary);font-size:12px;font-weight:600;padding:4px 12px;border-radius:100px}
.latest-date{font-size:12px;color:var(--text-weak);margin-left:auto}
.latest-card h3{font-size:17px;margin-bottom:10px;color:var(--dark);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-card p{font-size:14px;color:var(--text-body);line-height:1.7;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-more{font-size:13px;font-weight:600;color:var(--primary);margin-top:auto}
.empty-text{grid-column:1/-1;text-align:center;padding:60px 20px;font-size:15px;color:var(--text-weak)}
/* Stats */
.stats{background:linear-gradient(135deg,var(--dark) 0%,var(--dark-2) 100%);padding:80px 0;position:relative;overflow:hidden}
.stats::before{content:'';position:absolute;top:-80px;right:-80px;width:320px;height:320px;border-radius:50%;background:rgba(30,94,255,.18);filter:blur(80px)}
.stats::after{content:'';position:absolute;bottom:-100px;left:-40px;width:260px;height:260px;border-radius:50%;background:rgba(0,184,217,.14);filter:blur(70px)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;position:relative;z-index:2}
.stats-item{text-align:center;padding:24px 12px}
.stats-item .num{font-size:44px;font-weight:800;color:#fff;line-height:1;margin-bottom:10px;letter-spacing:-.02em}
.stats-item .num strong{font-weight:800}
.stats-item .num .plus{font-size:26px;color:var(--accent)}
.stats-item .label{font-size:14px;color:rgba(255,255,255,.6)}
.stats-item + .stats-item{border-left:1px solid rgba(255,255,255,.1)}
/* Process */
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative}
.process-step{position:relative;text-align:center;padding:36px 22px;background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:all .3s}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.process-step::after{content:'→';position:absolute;right:-20px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--primary);z-index:2;background:var(--bg);width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);font-weight:700}
.process-step:last-child::after{display:none}
.process-num{width:44px;height:44px;border-radius:14px;background:rgba(30,94,255,.1);color:var(--primary);font-size:18px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 18px}
.process-step h3{font-size:16px;margin-bottom:8px;color:var(--dark)}
.process-step p{font-size:13px;color:var(--text-body);line-height:1.7}
/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{background:var(--surface);border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:var(--shadow-sm);margin-bottom:14px;overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq-item.active{border-color:rgba(30,94,255,.3);box-shadow:var(--shadow-md)}
.faq-header{display:flex;align-items:center;gap:16px;padding:22px 26px;cursor:pointer;transition:background .3s}
.faq-header:hover{background:rgba(30,94,255,.03)}
.faq-header h3{flex:1;font-size:15px;color:var(--dark);line-height:1.5}
.faq-icon{width:26px;height:26px;border-radius:50%;background:var(--bg-deep);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:16px;transition:all .3s;flex-shrink:0;font-weight:600}
.faq-item.active .faq-icon{background:var(--primary);color:#fff;transform:rotate(45deg)}
.faq-body{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 26px;font-size:14px;color:var(--text-body);line-height:1.8}
.faq-item.active .faq-body{max-height:320px;padding:0 26px 22px}
/* CTA */
.cta-section{padding:0 0 var(--space-section)}
.cta-box{background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;border-radius:28px;padding:70px 64px;position:relative;overflow:hidden;text-align:center}
.cta-box::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(30,94,255,.9),rgba(0,184,217,.82))}
.cta-box .cta-content{position:relative;z-index:2}
.cta-box h2{color:#fff;font-size:34px;margin-bottom:14px}
.cta-box p{color:rgba(255,255,255,.86);font-size:16px;margin-bottom:32px;max-width:480px;margin-left:auto;margin-right:auto}
/* Footer */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand-mark{width:36px;height:36px;font-size:16px}
.footer-brand-name{font-size:20px;color:#fff;font-weight:800}
.footer-desc{font-size:14px;line-height:1.8;margin-bottom:20px;max-width:340px}
.footer-social{display:flex;gap:10px}
.footer-social a{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;font-size:14px;transition:all .3s;border:1px solid rgba(255,255,255,.1)}
.footer-social a:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateY(-3px)}
.footer-title{font-size:16px;color:#fff;margin-bottom:22px;font-weight:700}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.65);transition:all .3s;display:inline-flex;align-items:center;gap:6px}
.footer-links a::before{content:'›';opacity:0;transform:translateX(-4px);transition:all .3s;color:var(--accent)}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-links a:hover::before{opacity:1;transform:translateX(0)}
.footer-links a[data-slug]{cursor:pointer}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding:24px 0;font-size:13px;color:rgba(255,255,255,.4);flex-wrap:wrap;gap:12px}
/* Responsive */
@media (max-width:1024px){
  :root{--space-section:70px}
  .hero{min-height:520px}
  .hero h1{font-size:40px}
  .features-grid,.categories-grid,.latest-grid{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .process-step::after{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .stats-item+.stats-item{border-left:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .cta-box{padding:56px 36px}
}
@media (max-width:768px){
  :root{--space-section:56px}
  .header-search{display:none}
  .menu-toggle{display:flex}
  .main-nav{display:none;flex-direction:column;align-items:stretch;padding:0 0 16px;gap:4px}
  .main-nav.show{display:flex}
  .main-nav a{padding:12px 20px;border-radius:var(--radius-sm)}
  .main-nav .nav-trend{margin-left:0;padding:12px 20px;flex-wrap:wrap;border-top:1px solid var(--border);margin-top:8px;padding-top:16px}
  .main-nav .nav-trend .hot-key{font-size:12px}
  .hero{min-height:480px;text-align:center}
  .hero-content{max-width:100%;padding:60px 0}
  .hero h1{font-size:32px}
  .hero p{font-size:15px}
  .hero-actions{justify-content:center}
  .hero-stats{justify-content:center;gap:24px;flex-wrap:wrap}
  .hero-stats .stat-item+.stat-item{border-left:none;padding-left:0}
  .features-grid,.categories-grid{grid-template-columns:1fr}
  .latest-grid{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section-head h2{font-size:26px}
  .cta-box{padding:48px 24px;border-radius:20px}
  .cta-box h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:28px}
  .hero-stats{gap:16px}
  .hero-stats .stat-num{font-size:22px}
  .process-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px}
  .stats-item .num{font-size:34px}
  .btn{padding:10px 22px;font-size:14px}
  .btn-lg{padding:12px 32px;font-size:16px}
  .feature-card,.category-card{padding:24px}
  .faq-header{padding:18px 20px}
  .faq-body{padding:0 20px}
  .faq-item.active .faq-body{padding:0 20px 18px}
  .cta-box{padding:40px 18px}
}

/* roulang page: category1 */
:root {
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --bg-soft: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 44px rgba(15, 23, 42, 0.12);
  --transition: all 0.28s ease;
  --container: 1200px;
  --space-section: 84px;
  --space-section-sm: 56px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.72;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

input {
  font-family: inherit;
  outline: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  box-shadow: 0 1px 0 var(--border), 0 4px 20px rgba(15, 23, 42, 0.04);
}

.header-top {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 6px 18px rgba(29, 78, 216, 0.3);
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 5px 5px 5px 18px;
  width: 100%;
  max-width: 380px;
  transition: var(--transition);
}

.header-search:focus-within {
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.12);
}

.header-search input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--text);
  min-width: 0;
}

.header-search input::placeholder {
  color: #94a3b8;
}

.header-search button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.header-search button:hover {
  background: var(--primary-dark);
  transform: scale(1.04);
}

.header-search button:active {
  transform: scale(0.96);
}

.search-hot {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-weak);
  margin-left: 4px;
}

.search-hot .hot-key {
  background: #fef3c7;
  color: #b45309;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}

.search-hot .hot-key:hover {
  background: #fde68a;
  transform: translateY(-1px);
}

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

.nav-toggle:hover {
  background: #e2e8f0;
}

.header-bottom {
  background: var(--surface);
}

.header-bottom-inner {
  display: flex;
  align-items: center;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  width: 100%;
}

.main-nav > a {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  padding: 16px 0 12px;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.main-nav > a:hover {
  color: var(--primary);
}

.main-nav > a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.nav-trend {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  white-space: nowrap;
}

.nav-trend .hot-key {
  background: var(--bg-soft);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-weak);
  transition: var(--transition);
}

.nav-trend .hot-key:hover {
  background: #e0e7ff;
  color: var(--primary);
}

.page-banner {
  background:
    linear-gradient(118deg, rgba(15, 23, 42, 0.86) 10%, rgba(29, 78, 216, 0.78) 54%, rgba(14, 165, 233, 0.62) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 96px 0 84px;
  position: relative;
  overflow: hidden;
}

.page-banner::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 22px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

.page-banner h1 {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 0.5px;
  max-width: 680px;
  margin-bottom: 18px;
}

.page-banner p {
  font-size: 16px;
  line-height: 1.8;
  max-width: 600px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 34px;
}

.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  border-radius: 999px;
  padding: 13px 30px;
  transition: var(--transition);
}

.btn-primary {
  background: var(--surface);
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.2);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px);
}

.btn-dark {
  background: var(--text);
  color: #fff;
}

.btn-dark:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
}

.section {
  padding: var(--space-section) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: #e0e7ff;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.section-head h2 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 0.3px;
}

.section-head .sub {
  color: var(--text-weak);
  font-size: 15px;
  max-width: 360px;
  text-align: right;
}

.guide-intro {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.intro-copy h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 18px;
}

.intro-copy h2 em {
  font-style: normal;
  color: var(--primary);
}

.intro-copy p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 16px;
}

.intro-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-soft);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}

.feature-tag:hover {
  background: #e0e7ff;
  color: var(--primary);
  transform: translateY(-2px);
}

.feature-tag i {
  color: var(--primary);
}

.intro-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--primary-light));
  border-radius: 0 4px 4px 0;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.15;
}

.stat-number span {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-weak);
  margin-left: 2px;
}

.stat-label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-weak);
  font-weight: 500;
}

.guide-list-section {
  background: var(--bg);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.guide-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #c7d2fe;
}

.guide-card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

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

.guide-card:hover .guide-card-media img {
  transform: scale(1.05);
}

.guide-card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.18));
}

.card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 5px 14px;
  backdrop-filter: blur(6px);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.guide-card-body {
  padding: 24px 24px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.guide-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
}

.guide-card-body h3 a {
  color: var(--text);
}

.guide-card-body h3 a:hover {
  color: var(--primary);
}

.guide-card-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-weak);
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-weak);
}

.card-meta a {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-meta a:hover {
  gap: 10px;
}

.workflow-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.workflow-section::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 78, 216, 0.06), transparent 70%);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: relative;
  transition: var(--transition);
  border: 1px solid transparent;
}

.step:hover {
  background: var(--surface);
  border-color: #c7d2fe;
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 18px;
  box-shadow: 0 6px 16px rgba(29, 78, 216, 0.28);
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: #e0e7ff;
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-weak);
}

.popular-section {
  background: var(--bg);
}

.popular-wrap {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 44px;
  align-items: stretch;
}

.popular-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.popular-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 22px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
  transition: var(--transition);
}

.popular-item:hover {
  box-shadow: var(--shadow);
  transform: translateX(6px);
  border-color: #c7d2fe;
}

.rank {
  font-size: 26px;
  font-weight: 800;
  color: #cbd5e1;
  line-height: 1;
  min-width: 46px;
}

.popular-item:first-child .rank {
  color: var(--accent);
}

.popular-item:nth-child(2) .rank {
  color: var(--primary-light);
}

.popular-item:nth-child(3) .rank {
  color: #94a3b8;
}

.popular-body {
  flex: 1;
  min-width: 0;
}

.popular-body h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.4;
}

.popular-body h4 a {
  color: var(--text);
}

.popular-body h4 a:hover {
  color: var(--primary);
}

.popular-body p {
  font-size: 13px;
  color: var(--text-weak);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tags {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.tags span {
  font-size: 12px;
  background: var(--bg-soft);
  border-radius: 999px;
  padding: 2px 12px;
  color: var(--text-weak);
  font-weight: 600;
}

.tags span.primary {
  background: #e0e7ff;
  color: var(--primary);
}

.popular-views {
  font-size: 12px;
  color: var(--text-weak);
  white-space: nowrap;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}

.popular-side {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 320px;
}

.popular-side img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.5s ease;
}

.popular-side:hover img {
  transform: scale(1.04);
}

.popular-side-content {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.72));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
  color: #fff;
}

.popular-side-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.popular-side-content p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.popular-side-link {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 8px 18px;
  backdrop-filter: blur(4px);
  width: fit-content;
  transition: var(--transition);
}

.popular-side-link:hover {
  background: var(--accent);
  color: #0f172a;
  transform: translateY(-2px);
}

.faq-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: flex-start;
}

.faq-side h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.faq-side p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 24px;
}

.faq-contact {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}

.faq-contact strong {
  display: block;
  font-size: 16px;
  margin-bottom: 6px;
}

.faq-contact span {
  font-size: 14px;
  color: var(--text-weak);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: #c7d2fe;
}

.faq-item.active {
  background: var(--surface);
  box-shadow: var(--shadow);
  border-color: #c7d2fe;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  background: transparent;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question i {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e0e7ff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer p {
  padding: 0 24px 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-weak);
}

.cta-section {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary) 55%, var(--primary-light));
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  left: -60px;
  bottom: -90px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-section::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.cta-box {
  position: relative;
  text-align: center;
  color: #fff;
}

.cta-box h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.footer-brand .brand-mark {
  background: linear-gradient(135deg, var(--primary-light), #0ea5e9);
}

.footer-brand-name {
  font-size: 19px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.4px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.85;
  max-width: 360px;
  margin-bottom: 22px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 3px;
  border-radius: 2px;
  background: var(--primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: #94a3b8;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 24px 0;
  font-size: 13px;
  color: #64748b;
}

@media (max-width: 1024px) {
  .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .popular-wrap {
    grid-template-columns: 1fr;
  }

  .popular-side {
    min-height: 260px;
  }

  .popular-side img {
    position: relative;
    height: 260px;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .header-search {
    max-width: 260px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 60px;
    --space-section-sm: 40px;
  }

  .header-top {
    padding: 10px 0;
  }

  .header-search {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-bottom .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 16px;
    box-shadow: 0 20px 36px rgba(15, 23, 42, 0.14);
    gap: 4px;
  }

  .header-bottom .main-nav.open {
    display: flex;
  }

  .header-bottom .main-nav > a {
    padding: 14px 4px;
    border-bottom: 1px solid var(--border);
    border-left: 3px solid transparent;
    font-size: 15px;
  }

  .header-bottom .main-nav > a.active {
    border-left-color: var(--primary);
    background: #f8fafc;
  }

  .nav-trend {
    margin-left: 0;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
  }

  .page-banner {
    padding: 64px 0 56px;
  }

  .page-banner h1 {
    font-size: 30px;
  }

  .page-banner p {
    font-size: 15px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 28px;
  }

  .section-head .sub {
    text-align: left;
    font-size: 14px;
  }

  .section-head h2 {
    font-size: 26px;
  }

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

  .stat-card {
    padding: 20px 16px;
  }

  .stat-number {
    font-size: 28px;
  }

  .guide-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .step {
    padding: 22px 18px;
  }

  .popular-item {
    padding: 18px;
    gap: 14px;
    flex-wrap: wrap;
  }

  .popular-views {
    display: none;
  }

  .rank {
    min-width: 34px;
    font-size: 22px;
  }

  .faq-question {
    font-size: 15px;
    padding: 18px 18px;
  }

  .faq-answer p {
    padding: 0 18px 18px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 17px;
  }

  .page-banner h1 {
    font-size: 26px;
    line-height: 1.35;
  }

  .banner-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }

  .intro-copy h2 {
    font-size: 24px;
  }

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

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

  .step {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    text-align: left;
  }

  .step-num {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .step-icon {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .popular-body p {
    white-space: normal;
  }

  .faq-layout {
    gap: 28px;
  }

  .footer-social a {
    width: 36px;
    height: 36px;
  }
}

/* roulang page: article */
:root {
  --color-primary: #1d3c92;
  --color-primary-deep: #142a63;
  --color-accent: #f5a623;
  --color-accent-dark: #d98e10;
  --color-green: #10b981;
  --color-bg: #f4f6fb;
  --color-surface: #ffffff;
  --color-dark: #0d172e;
  --color-text: #1e2a3d;
  --color-muted: #5c6b84;
  --color-border: #dfe5f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(13,23,46,.06);
  --shadow-md: 0 8px 28px rgba(13,23,46,.09);
  --shadow-lg: 0 18px 50px rgba(13,23,46,.13);
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --container: 1200px;
  --header-h: 76px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: 'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif; font-size: 15px; line-height: 1.7; color: var(--color-text); background: var(--color-bg); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
:focus-visible { outline: 3px solid rgba(29,60,146,.38); outline-offset: 2px; border-radius: 6px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px; border-radius: 999px; font-weight: 600; font-size: 15px; line-height: 1.2; transition: all var(--transition); white-space: nowrap; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 6px 18px rgba(29,60,146,.28); }
.btn-primary:hover { background: var(--color-primary-deep); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(29,60,146,.34); }
.btn-accent { background: var(--color-accent); color: #1a1a1a; box-shadow: 0 6px 18px rgba(245,166,35,.32); }
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(245,166,35,.4); }
.btn-light { background: #fff; color: var(--color-primary); box-shadow: 0 6px 18px rgba(255,255,255,.18); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255,255,255,.28); }
.btn-block { width: 100%; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid rgba(223,229,240,.8); box-shadow: 0 2px 16px rgba(13,23,46,.04); transition: box-shadow var(--transition); }
.site-header.scrolled { box-shadow: 0 4px 26px rgba(13,23,46,.1); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 20px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; flex-shrink: 0; }
.brand-mark { width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--color-primary), #3b5bdb); color: #fff; border-radius: 13px; font-size: 20px; font-weight: 900; box-shadow: 0 4px 14px rgba(29,60,146,.35); }
.brand-name { font-size: 20px; letter-spacing: .5px; color: var(--color-dark); white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 6px; flex: 1; justify-content: flex-end; }
.main-nav > a { padding: 10px 16px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--color-text); transition: all var(--transition); }
.main-nav > a:hover { color: var(--color-primary); background: rgba(29,60,146,.07); }
.main-nav > a.active { color: var(--color-primary); background: rgba(29,60,146,.1); font-weight: 700; }
.nav-trend { display: flex; align-items: center; gap: 6px; margin-left: 16px; padding-left: 16px; border-left: 1px solid var(--color-border); flex-shrink: 0; }
.trend-label { font-size: 13px; color: var(--color-muted); white-space: nowrap; }
.hot-key { display: inline-block; padding: 4px 13px; border-radius: 999px; font-size: 13px; background: #fff7e8; color: #a36a00; border: 1px solid #fbe3b3; cursor: default; transition: all var(--transition); }
.hot-key:hover { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--color-border); background: #fff; flex-direction: column; align-items: center; justify-content: center; gap: 4px; flex-shrink: 0; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--color-dark); border-radius: 2px; transition: all var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.article-hero { position: relative; background-color: var(--color-dark); background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; padding: 70px 0 62px; color: #fff; overflow: hidden; }
.article-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(13,23,46,.93) 10%, rgba(29,60,146,.78) 55%, rgba(13,23,46,.5) 100%); }
.article-hero-inner { position: relative; z-index: 2; max-width: 980px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13px; color: rgba(255,255,255,.68); margin-bottom: 22px; }
.breadcrumb a { color: rgba(255,255,255,.85); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb-sep { color: rgba(255,255,255,.4); }
.breadcrumb-current { color: var(--color-accent); }
.article-title { font-size: clamp(26px, 4vw, 38px); line-height: 1.3; font-weight: 800; margin-bottom: 20px; letter-spacing: .3px; text-wrap: balance; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; font-size: 14px; color: rgba(255,255,255,.82); }
.meta-badge { display: inline-block; padding: 5px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.category-badge { background: rgba(245,166,35,.18); color: var(--color-accent); border: 1px solid rgba(245,166,35,.42); }
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-section { padding: 48px 0 72px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 32px; align-items: start; }
.article-main { min-width: 0; }
.article-card { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); overflow: hidden; }
.article-body { padding: clamp(24px, 4vw, 44px); }
.article-body > *:first-child { margin-top: 0; }
.article-body > *:last-child { margin-bottom: 0; }
.article-body h2 { font-size: 24px; line-height: 1.45; color: var(--color-dark); font-weight: 800; margin: 30px 0 14px; padding-left: 14px; border-left: 4px solid var(--color-accent); border-radius: 2px; }
.article-body h3 { font-size: 20px; line-height: 1.5; color: var(--color-dark); font-weight: 700; margin: 26px 0 12px; }
.article-body p { margin: 16px 0; font-size: 16px; line-height: 1.9; }
.article-body strong { color: var(--color-dark); font-weight: 700; }
.article-body em { font-style: italic; }
.article-body a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--color-accent-dark); }
.article-body img { max-width: 100%; border-radius: var(--radius-md); margin: 26px 0; box-shadow: var(--shadow-sm); }
.article-body ul, .article-body ol { margin: 16px 0; padding-left: 24px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin: 9px 0; line-height: 1.8; padding-left: 4px; }
.article-body blockquote { border-left: 4px solid var(--color-accent); background: #fff8ec; padding: 18px 22px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 24px 0; color: var(--color-text); line-height: 1.8; }
.article-body blockquote p { margin: 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; border-radius: var(--radius-sm); overflow: hidden; }
.article-body th, .article-body td { border: 1px solid var(--color-border); padding: 11px 14px; text-align: left; font-size: 14px; }
.article-body th { background: #f0f3fa; font-weight: 700; color: var(--color-dark); }
.article-body hr { border: none; border-top: 1px solid var(--color-border); margin: 28px 0; }
.not-found { padding: 90px 30px; text-align: center; }
.not-found-icon { width: 66px; height: 66px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: #fdecec; color: #d64141; font-size: 30px; font-weight: 800; box-shadow: 0 6px 20px rgba(214,65,65,.12); }
.not-found h2 { font-size: 26px; margin-bottom: 10px; color: var(--color-dark); }
.not-found p { color: var(--color-muted); margin-bottom: 28px; }
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 20px; padding: 18px 24px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.tags-label { font-size: 14px; font-weight: 600; color: var(--color-muted); }
.tag-item { display: inline-block; padding: 6px 16px; border-radius: 999px; background: #f4f6fb; border: 1px solid var(--color-border); font-size: 13px; color: var(--color-text); transition: all var(--transition); }
.tag-item:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.article-sidebar { display: flex; flex-direction: column; gap: 22px; position: sticky; top: calc(var(--header-h) + 20px); }
.side-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 26px; box-shadow: var(--shadow-sm); }
.side-title { font-size: 18px; font-weight: 700; color: var(--color-dark); margin-bottom: 16px; position: relative; padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }
.side-title::after { content: ''; position: absolute; left: 0; bottom: -1px; width: 36px; height: 3px; border-radius: 3px; background: var(--color-accent); }
.about-card p { font-size: 14px; color: var(--color-muted); margin-bottom: 16px; }
.mini-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 18px; }
.mini-stat { background: #f4f6fb; border-radius: var(--radius-sm); padding: 12px 8px; text-align: center; border: 1px solid var(--color-border); }
.mini-stat strong { display: block; font-size: 20px; font-weight: 800; color: var(--color-primary); line-height: 1.3; }
.mini-stat span { font-size: 12px; color: var(--color-muted); }
.hot-list { display: flex; flex-direction: column; gap: 4px; }
.hot-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 14px; color: var(--color-text); transition: all var(--transition); }
.hot-item:hover { background: #f4f6fb; color: var(--color-primary); transform: translateX(4px); }
.hot-rank { width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; border-radius: 8px; background: #f4f6fb; font-size: 12px; font-weight: 700; color: var(--color-muted); flex-shrink: 0; }
.hot-item:nth-child(1) .hot-rank { background: rgba(245,166,35,.2); color: #b57510; }
.hot-item:nth-child(2) .hot-rank { background: rgba(29,60,146,.12); color: var(--color-primary); }
.hot-item:nth-child(3) .hot-rank { background: rgba(16,185,129,.14); color: #07815c; }
.cta-card { background: linear-gradient(150deg, var(--color-primary), #274a96 65%, #1d3c92); color: #fff; border: none; overflow: hidden; }
.cta-card .side-title { color: #fff; border-bottom-color: rgba(255,255,255,.15); }
.cta-card .side-title::after { background: var(--color-accent); }
.cta-card p { font-size: 14px; color: rgba(255,255,255,.8); margin-bottom: 20px; }
.related-section { padding: 70px 0; background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 30px; flex-wrap: wrap; gap: 8px; }
.section-title { font-size: clamp(22px, 3vw, 28px); font-weight: 800; color: var(--color-dark); position: relative; padding-left: 16px; }
.section-title::before { content: ''; position: absolute; left: 0; top: 6px; width: 5px; height: 24px; border-radius: 4px; background: var(--color-accent); }
.section-subtitle { font-size: 14px; color: var(--color-muted); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); box-shadow: var(--shadow-sm); display: flex; flex-direction: column; }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(29,60,146,.22); }
.related-img { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #e9edf3; }
.related-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-img img { transform: scale(1.06); }
.img-badge { position: absolute; top: 12px; left: 12px; padding: 5px 14px; border-radius: 999px; background: rgba(13,23,46,.72); color: #fff; font-size: 12px; font-weight: 600; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.related-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.related-body h3 { font-size: 17px; line-height: 1.5; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; }
.related-body p { font-size: 13px; color: var(--color-muted); line-height: 1.7; margin-bottom: 14px; flex: 1; }
.related-link { font-size: 14px; font-weight: 600; color: var(--color-primary); display: inline-flex; align-items: center; gap: 6px; }
.related-link::after { content: '→'; transition: transform var(--transition); }
.related-card:hover .related-link::after { transform: translateX(4px); }
.faq-section { padding: 70px 0; }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition); }
.faq-item[open] { box-shadow: var(--shadow-md); border-color: rgba(29,60,146,.2); }
.faq-item summary { list-style: none; cursor: pointer; padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--color-dark); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 22px; font-weight: 400; color: var(--color-primary); transition: transform var(--transition); flex-shrink: 0; line-height: 1; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 24px 20px; font-size: 14px; color: var(--color-muted); line-height: 1.8; }
.cta-section { background: linear-gradient(120deg, #0d172e 0%, #142a63 60%, #1d3c92 120%); padding: 60px 0; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -80px; right: -60px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(245,166,35,.22), transparent 65%); }
.cta-section::after { content: ''; position: absolute; bottom: -100px; left: 10%; width: 220px; height: 220px; border-radius: 50%; background: radial-gradient(circle, rgba(29,60,146,.5), transparent 65%); }
.cta-inner { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 32px; color: #fff; flex-wrap: wrap; }
.cta-inner h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 800; margin-bottom: 8px; }
.cta-inner p { color: rgba(255,255,255,.72); font-size: 15px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer { background: var(--color-dark); color: rgba(255,255,255,.72); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand-name { color: #fff; font-size: 18px; font-weight: 800; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.62); margin-bottom: 18px; max-width: 380px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border-radius: 10px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.1); color: #fff; font-size: 14px; font-weight: 600; transition: all var(--transition); }
.footer-social a:hover { background: var(--color-accent); border-color: var(--color-accent); color: #1a1a1a; transform: translateY(-2px); }
.footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.6); transition: all var(--transition); }
.footer-links a:hover { color: var(--color-accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); 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); }
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; }
  .article-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .side-card { flex: 1 1 calc(50% - 12px); min-width: 260px; }
  .cta-card { flex: 1 1 100%; }
  .nav-trend { display: none; }
}
@media (max-width: 768px) {
  .header-inner { padding: 0 16px; }
  .nav-toggle { display: flex; }
  .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--color-surface); flex-direction: column; align-items: flex-start; gap: 4px; padding: 18px 24px 24px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--color-border); transform: translateY(-120%); opacity: 0; visibility: hidden; transition: transform .35s ease, opacity .3s ease, visibility .3s; }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav > a { width: 100%; padding: 13px 16px; border-radius: 10px; }
  .main-nav > a.active, .main-nav > a:hover { background: rgba(29,60,146,.08); }
  .nav-trend { display: flex; margin-left: 0; padding-left: 0; border-left: none; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--color-border); flex-wrap: wrap; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-hero { padding: 52px 0 46px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .section-head { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-meta { gap: 10px 14px; }
  .side-card { flex: 1 1 100%; }
  .article-body { padding: 20px; }
  .article-tags { padding: 16px 18px; }
  .faq-item summary { padding: 17px 18px; font-size: 15px; }
  .faq-item p { padding: 0 18px 18px; }
  .btn { padding: 11px 22px; font-size: 14px; }
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root {
  --primary: #1e3a8a;
  --primary-light: #2563eb;
  --primary-soft: #dbeafe;
  --accent: #f59e0b;
  --accent-soft: #fef3c7;
  --dark: #0f172a;
  --body-bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-weak: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  --container-w: 1200px;
  --header-h: 76px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", SimSun, serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
a:hover, a:focus {
  color: var(--primary-light);
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  border: none;
  background: none;
}
button {
  cursor: pointer;
}
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.45);
  outline-offset: 2px;
  border-radius: 4px;
}
ul, ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 72px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.section-head .kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary-light);
  text-transform: uppercase;
  background: var(--primary-soft);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--dark);
  letter-spacing: -0.02em;
}
.section-title .accent {
  color: var(--primary);
  position: relative;
}
.section-title .accent::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 100px;
  opacity: 0.6;
}
.section-desc {
  margin-top: 12px;
  color: var(--text-light);
  font-size: 16px;
  max-width: 640px;
  line-height: 1.8;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 20px rgba(15, 23, 42, 0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}
.brand-name {
  font-size: 21px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand-name span {
  color: var(--primary-light);
  font-weight: 800;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 12px;
}
.main-nav::-webkit-scrollbar { display: none; }
.main-nav a {
  position: relative;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  border-radius: 100px;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--primary-light);
  border-radius: 100px;
  opacity: 0;
  transition: all 0.3s ease;
}
.main-nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.main-nav a:hover::after,
.main-nav a.active::after {
  opacity: 1;
  width: 24px;
}
.main-nav a.active {
  color: var(--primary);
  font-weight: 700;
  background: var(--primary-soft);
}
.nav-trend {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--accent-soft);
  border-radius: 100px;
  flex-shrink: 0;
  font-size: 13px;
  white-space: nowrap;
}
.nav-trend span:first-child {
  color: var(--text-light);
  font-weight: 500;
}
.nav-trend .hot-key {
  font-weight: 700;
  color: var(--dark);
  background: #fff;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 12px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.nav-trend .hot-key:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
}
.header-mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ===== Hero 横幅 ===== */
.class-hero {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #2563eb 100%);
  color: #fff;
  padding: 90px 0;
  overflow: hidden;
}
.class-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.25;
  mix-blend-mode: overlay;
}
.class-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.15);
  filter: blur(60px);
  pointer-events: none;
}
.class-hero .container {
  position: relative;
  z-index: 2;
}
.class-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
}
.class-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}
.class-hero .breadcrumb a:hover {
  color: var(--accent);
}
.class-hero .breadcrumb .separator {
  opacity: 0.5;
}
.class-hero .breadcrumb .current {
  color: var(--accent);
  font-weight: 600;
}
.class-hero h1 {
  font-size: clamp(34px, 5vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 760px;
  letter-spacing: -0.02em;
}
.class-hero h1 .gradient-text {
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.class-hero .hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 32px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
}
.hero-stats .stat-item {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  text-align: center;
  min-width: 130px;
  transition: all 0.3s ease;
}
.hero-stats .stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}
.hero-stats .stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero-stats .stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 6px;
  letter-spacing: 0.5px;
}

/* ===== 学习路径 / 流程 ===== */
.learning-path {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-light);
}
.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.path-item {
  position: relative;
  padding: 28px 24px;
  background: linear-gradient(145deg, var(--border-light), #f8fafc);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  transition: all 0.35s ease;
  overflow: hidden;
}
.path-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-light), var(--accent));
  opacity: 0;
  transition: all 0.35s ease;
}
.path-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.path-item:hover::before {
  opacity: 1;
}
.path-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}
.path-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.path-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 教学内容分类卡片 ===== */
.tutorial-cards {
  background: var(--body-bg);
}
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tutorial-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.tutorial-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.tutorial-card .cover {
  position: relative;
  height: 220px;
  overflow: hidden;
  cursor: pointer;
}
.tutorial-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.tutorial-card:hover .cover img {
  transform: scale(1.08);
}
.tutorial-card .cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.35) 0%, transparent 55%);
  pointer-events: none;
}
.tutorial-card .cover .cat-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 100px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}
.tutorial-card .cover .play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -40%);
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  z-index: 2;
}
.tutorial-card:hover .play-btn {
  opacity: 1;
  transform: translate(-50%, -50%);
}
.tutorial-card .play-btn i {
  margin-left: 3px;
}
.tutorial-card .body {
  padding: 24px 24px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.tutorial-card .meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 10px;
}
.tutorial-card .meta .tag {
  background: var(--primary-soft);
  color: var(--primary-light);
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 12px;
}
.tutorial-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 10px;
}
.tutorial-card h3 a {
  transition: all 0.3s ease;
}
.tutorial-card h3 a:hover {
  color: var(--primary);
}
.tutorial-card .desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.tutorial-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}
.tutorial-card .author-note {
  font-size: 13px;
  color: var(--text-light);
}
.tutorial-card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tutorial-card .card-link i {
  transition: transform 0.3s ease;
}
.tutorial-card .card-link:hover i {
  transform: translateX(4px);
}

/* ===== 列表区块 ===== */
.list-section {
  background: var(--card-bg);
}
.list-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 40px;
  align-items: start;
}
.tutorial-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.tutorial-list .list-item {
  display: flex;
  gap: 20px;
  padding: 18px;
  background: var(--body-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}
.tutorial-list .list-item:hover {
  background: var(--card-bg);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.tutorial-list .thumb {
  width: 120px;
  height: 84px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.tutorial-list .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.tutorial-list .list-item:hover .thumb img {
  transform: scale(1.1);
}
.tutorial-list .content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.tutorial-list .content h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
  line-height: 1.4;
}
.tutorial-list .content h4 a:hover {
  color: var(--primary);
}
.tutorial-list .content .meta {
  font-size: 13px;
  color: var(--text-weak);
  display: flex;
  gap: 12px;
  align-items: center;
}
.tutorial-list .content .meta span i {
  margin-right: 4px;
  color: var(--primary-light);
}
.coach-card {
  background: linear-gradient(145deg, var(--primary) , var(--primary-light));
  border-radius: var(--radius-lg);
  padding: 36px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.coach-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}
.coach-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
}
.coach-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: 20px;
}
.coach-card .coach-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}
.coach-card .coach-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  font-weight: 700;
}
.coach-card .coach-info {
  font-size: 14px;
}
.coach-card .coach-info strong {
  display: block;
  font-size: 16px;
}

/* ===== 技巧提示 ===== */
.tips-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  color: #fff;
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.tip-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}
.tip-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.5);
}
.tip-item .tip-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(245, 158, 11, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--accent);
  margin-bottom: 16px;
}
.tip-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}
.tip-item p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--body-bg);
}
.faq-layout {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 40px;
}
.faq-side {
  position: sticky;
  top: 100px;
  align-self: start;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.faq-side h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 12px;
}
.faq-side p {
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}
.faq-side .contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 100px;
  transition: all 0.3s ease;
}
.faq-side .contact-btn:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--primary-light);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary {
  color: var(--primary);
  border-bottom: 1px solid var(--border-light);
}
.faq-item[open] summary::after {
  content: "\f068";
  transform: rotate(180deg);
}
.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-light);
}
.cta-box {
  position: relative;
  background: linear-gradient(135deg, var(--primary), #051b54);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  background: rgba(245, 158, 11, 0.3);
  border-radius: 50%;
  filter: blur(50px);
}
.cta-box .container {
  position: relative;
  z-index: 2;
}
.cta-box h2 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 660px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.cta-box .cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--dark);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 100px;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}
.cta-btn:hover {
  background: #fbbf24;
  color: var(--dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(245, 158, 11, 0.5);
}
.cta-btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 100px;
  transition: all 0.3s ease;
}
.cta-btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.brand-mark.small {
  width: 36px;
  height: 36px;
  font-size: 16px;
  border-radius: 10px;
}
.footer-brand-name {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
  max-width: 360px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}
.footer-social a:hover {
  background: var(--accent);
  color: var(--dark);
  transform: translateY(-3px);
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 3px;
  background: var(--accent);
  border-radius: 100px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-links a::before {
  content: "\f105";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 12px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: all 0.3s ease;
}
.footer-links a:hover {
  color: #fff;
  transform: translateX(4px);
}
.footer-links a:hover::before {
  opacity: 1;
  transform: translateX(0);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .path-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .list-layout {
    grid-template-columns: 1fr;
  }
  .faq-layout {
    grid-template-columns: 1fr;
  }
  .faq-side {
    position: static;
  }
  .tutorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .header-mobile-toggle {
    display: flex;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    padding: 20px;
    gap: 8px;
    align-items: flex-start;
    overflow-y: auto;
    max-height: calc(100vh - var(--header-h));
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav a {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
  }
  .main-nav a.active {
    background: var(--primary-soft);
  }
  .main-nav a::after {
    display: none;
  }
  .nav-trend {
    margin-top: 12px;
    padding: 10px 16px;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .header-inner {
    gap: 12px;
  }
  .brand-name {
    font-size: 18px;
  }
  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
  .hero-stats {
    gap: 12px;
  }
  .hero-stats .stat-item {
    padding: 12px 16px;
    min-width: 100px;
    flex: 1;
  }
  .hero-stats .stat-num {
    font-size: 24px;
  }
  .class-hero {
    padding: 64px 0;
  }
  .path-grid,
  .tips-grid {
    grid-template-columns: 1fr;
  }
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
  .tutorial-card .cover {
    height: 180px;
  }
  .cta-box {
    padding: 40px 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-bottom span:last-child {
    font-size: 12px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .section {
    padding: 44px 0;
  }
  .brand-name {
    font-size: 16px;
    letter-spacing: 0;
  }
  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 16px;
    border-radius: 8px;
  }
  .header-mobile-toggle {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
  .class-hero h1 {
    font-size: 28px;
  }
  .class-hero .hero-lead {
    font-size: 15px;
  }
  .section-title {
    font-size: 24px;
  }
  .tutorial-card .cover {
    height: 160px;
  }
  .tutorial-list .list-item {
    flex-direction: column;
    padding: 14px;
  }
  .tutorial-list .thumb {
    width: 100%;
    height: 80px;
  }
  .tutorial-list .content h4 {
    font-size: 15px;
  }
  .faq-item summary {
    padding: 16px 18px;
    font-size: 15px;
  }
  .faq-item .faq-answer {
    padding: 0 16px 14px;
    font-size: 14px;
  }
  .cta-box h2 {
    font-size: 22px;
  }
  .cta-box p {
    font-size: 14px;
  }
  .cta-btn, .cta-btn-outline {
    width: 100%;
    justify-content: center;
  }
  .footer-brand-name {
    font-size: 16px;
  }
  .footer-links, .footer-desc, .footer-title {
    font-size: 14px;
  }
  .nav-trend {
    font-size: 12px;
  }
  .nav-trend .hot-key {
    font-size: 11px;
    padding: 2px 8px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #1a5cff;
  --primary-dark: #0e42c8;
  --primary-light: #eaf1ff;
  --accent: #ff6b35;
  --accent-light: #fff0ea;
  --bg: #f5f7fc;
  --bg-deep: #0c1226;
  --bg-card: #ffffff;
  --text: #17223b;
  --text-weak: #64718c;
  --text-mute: #97a1b5;
  --border: #e2e8f3;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 6px 24px rgba(20, 36, 80, 0.07);
  --shadow-hover: 0 16px 44px rgba(20, 36, 80, 0.13);
  --header-h: 120px;
  --container-w: 1200px;
  --transition: all 0.3s cubic-bezier(0.22, 0.68, 0.32, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button, input { font-family: inherit; border: 0; outline: none; background: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

/* ====== Header 吸顶导航 ====== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(20, 36, 80, 0.05);
}
.header-top { background: var(--bg-deep); }
.header-top-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 52px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #3a86ff);
  color: #fff; font-size: 17px; font-weight: 800;
  box-shadow: 0 4px 14px rgba(26, 92, 255, 0.35);
}
.brand-name {
  color: #fff; font-size: 18px; font-weight: 700; letter-spacing: 0.5px;
  white-space: nowrap;
}
.header-search {
  display: flex; align-items: center;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 40px;
  padding: 4px 4px 4px 16px;
  width: 320px; max-width: 40%;
  transition: var(--transition);
}
.header-search:focus-within { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.35); }
.header-search input {
  flex: 1; background: none; color: #fff; font-size: 13px;
  padding: 6px 0;
}
.header-search input::placeholder { color: rgba(255,255,255,0.55); }
.header-search button {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 14px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.header-search button:hover { background: var(--primary-dark); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 40px; font-weight: 600; cursor: pointer;
  padding: 10px 24px; font-size: 14px; line-height: 1.4;
  transition: var(--transition);
}
.btn-sm { padding: 6px 18px; font-size: 13px; }
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 16px rgba(26, 92, 255, 0.3);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26, 92, 255, 0.4); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.2); }
.nav-toggle { display: none; color: #fff; font-size: 22px; cursor: pointer; }

.header-nav-wrap {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.main-nav {
  display: flex; align-items: center; gap: 4px;
  height: 56px; overflow-x: auto; scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.main-nav > a {
  display: inline-flex; align-items: center;
  padding: 8px 18px; border-radius: 30px;
  font-size: 15px; font-weight: 500; color: var(--text);
  white-space: nowrap; position: relative;
}
.main-nav > a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav > a.active { color: var(--primary); font-weight: 700; background: var(--primary-light); }
.main-nav > a.active::after {
  content: ''; position: absolute; left: 24px; right: 24px; bottom: 2px;
  height: 3px; border-radius: 3px; background: var(--primary);
}
.nav-trend {
  display: flex; align-items: center; gap: 6px;
  margin-left: auto; padding-left: 16px; color: var(--text-weak); font-size: 13px;
  white-space: nowrap;
}
.hot-key {
  background: var(--accent-light); color: var(--accent);
  padding: 3px 10px; border-radius: 20px; font-weight: 600; font-size: 12px;
  cursor: pointer; transition: var(--transition);
}
.hot-key:hover { background: var(--accent); color: #fff; transform: translateY(-1px); }

/* ====== Hero ====== */
.page-hero {
  position: relative;
  padding: 88px 0 72px;
  background: linear-gradient(135deg, rgba(12,18,38,0.92) 0%, rgba(14,42,88,0.82) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
}
.page-hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 30px; padding: 6px 16px;
  font-size: 13px; font-weight: 600; backdrop-filter: blur(6px);
  margin-bottom: 20px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #38f2af; animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(0.8); } }
.page-hero h1 {
  font-size: 44px; font-weight: 800; line-height: 1.25;
  letter-spacing: 1px; margin-bottom: 16px;
}
.page-hero h1 span { color: #66a3ff; }
.page-hero .hero-desc {
  max-width: 640px; font-size: 16px; line-height: 1.9;
  color: rgba(255,255,255,0.82); margin-bottom: 30px;
}
.hero-meta { display: flex; gap: 28px; flex-wrap: wrap; }
.hero-meta div {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: rgba(255,255,255,0.85);
}
.hero-meta .hl { font-weight: 700; font-size: 20px; color: #fff; }

/* ====== 板块通用 ====== */
.section { padding: 72px 0; }
.section-alt { background: #fff; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 36px; gap: 16px;
}
.section-head h2 { font-size: 28px; font-weight: 800; letter-spacing: 0.5px; position: relative; }
.section-head h2::before {
  content: ''; display: inline-block; width: 6px; height: 24px;
  border-radius: 4px; background: var(--primary); margin-right: 12px;
  vertical-align: -3px;
}
.section-head .sub { color: var(--text-weak); font-size: 15px; margin-top: 6px; }
.section-more { color: var(--primary); font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.section-more:hover { gap: 8px; }

/* ====== 频道Tabs ====== */
.channel-tabs {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 40px;
  background: #fff; border-radius: var(--radius);
  padding: 10px; border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.channel-tab {
  padding: 9px 22px; border-radius: 30px;
  font-size: 14px; font-weight: 500;
  color: var(--text-weak); cursor: pointer;
  background: transparent; transition: var(--transition);
}
.channel-tab:hover { color: var(--primary); background: var(--primary-light); }
.channel-tab.active { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 4px 14px rgba(26,92,255,0.3); }

/* ====== 资讯卡片 ====== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: var(--transition);
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26,92,255,0.25);
}
.card-thumb { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .card-thumb img { transform: scale(1.06); }
.card-tag {
  position: absolute; top: 12px; left: 12px;
  background: rgba(255,255,255,0.92);
  color: var(--primary); font-size: 12px; font-weight: 700;
  padding: 4px 12px; border-radius: 20px; backdrop-filter: blur(4px);
}
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 17px; font-weight: 700; line-height: 1.5; margin-bottom: 10px; }
.card-body h3 a:hover { color: var(--primary); }
.card-body p { font-size: 14px; color: var(--text-weak); line-height: 1.7; flex: 1; }
.card-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--text-mute);
}
.card-meta .views { display: inline-flex; align-items: center; gap: 4px; }

/* ====== 热门赛事数据 ====== */
.stats-section {
  background: linear-gradient(135deg, #0c1226 0%, #0f1e3e 100%);
  color: #fff;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; text-align: center;
}
.stat-item { padding: 20px; position: relative; }
.stat-item::after {
  content: ''; position: absolute; right: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 60px; background: rgba(255,255,255,0.12);
}
.stat-item:last-child::after { display: none; }
.stat-num { font-size: 44px; font-weight: 800; color: #fff; line-height: 1.2; }
.stat-num em { font-style: normal; color: #66a3ff; font-size: 24px; margin-left: 2px; }
.stat-label { font-size: 14px; color: rgba(255,255,255,0.65); margin-top: 8px; }
.stat-icon { font-size: 28px; margin-bottom: 8px; }

/* ====== 精选专题 ====== */
.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}
.feature-card {
  border-radius: var(--radius);
  overflow: hidden; position: relative;
  min-height: 340px;
  background-size: cover; background-position: center;
  display: flex; align-items: flex-end;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(8,14,30,0.88) 0%, rgba(8,14,30,0.2) 50%, rgba(8,14,30,0) 100%);
}
.feature-content { position: relative; z-index: 2; padding: 32px; color: #fff; }
.feature-tag {
  background: var(--accent); color: #fff;
  padding: 4px 14px; border-radius: 20px;
  font-size: 12px; font-weight: 700;
  display: inline-block; margin-bottom: 14px;
}
.feature-content h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.feature-content p { font-size: 14px; color: rgba(255,255,255,0.8); max-width: 420px; }
.feature-more { display: inline-flex; align-items: center; gap: 4px; margin-top: 16px; font-size: 14px; font-weight: 600; color: #66a3ff; }
.feature-more:hover { gap: 8px; }

/* ====== 热门排行 ====== */
.rank-list {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  overflow: hidden;
}
.rank-item { display: flex; align-items: center; gap: 20px; padding: 20px 24px; border-bottom: 1px solid var(--border); transition: var(--transition); }
.rank-item:last-child { border-bottom: 0; }
.rank-item:hover { background: var(--primary-light); padding-left: 30px; }
.rank-num {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--bg); color: var(--text-weak);
  font-weight: 800; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.rank-item:nth-child(1) .rank-num { background: linear-gradient(135deg, #ff6b35, #ff9a5c); color: #fff; }
.rank-item:nth-child(2) .rank-num { background: linear-gradient(135deg, #4a90d9, #7ab0e8); color: #fff; }
.rank-item:nth-child(3) .rank-num { background: linear-gradient(135deg, #34a874, #5cc997); color: #fff; }
.rank-info { flex: 1; }
.rank-info h3 { font-size: 15px; font-weight: 600; line-height: 1.5; }
.rank-item:hover .rank-info h3 { color: var(--primary); }
.rank-meta { font-size: 12px; color: var(--text-mute); margin-top: 4px; }
.rank-heat { font-size: 13px; font-weight: 700; color: var(--accent); white-space: nowrap; }

/* ====== FAQ ====== */
.faq-wrap { max-width: 840px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 14px; overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(26,92,255,0.3); }
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; cursor: pointer;
  font-size: 16px; font-weight: 600;
}
.faq-q .icon { font-size: 20px; color: var(--primary); transition: transform 0.3s; }
.faq-item.active .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  padding: 0 24px;
  color: var(--text-weak); font-size: 14px; line-height: 1.8;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.active .faq-a { max-height: 300px; padding-bottom: 20px; }

/* ====== CTA ====== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #3a86ff 100%);
  color: #fff; text-align: center;
  padding: 64px 0;
}
.cta-section h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 28px; font-size: 15px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ====== Footer ====== */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,0.7); padding: 64px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 48px; padding-bottom: 40px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand-name { color: #fff; font-size: 18px; font-weight: 700; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: #fff; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); transform: translateY(-3px); }
.footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.65); }
.footer-links a:hover { color: #fff; padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 22px 0; display: flex;
  justify-content: space-between; align-items: center;
  font-size: 13px; color: rgba(255,255,255,0.45);
  gap: 12px; flex-wrap: wrap;
}

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .header-search { width: 240px; }
}
@media (max-width: 768px) {
  .header-top-inner { height: 56px; }
  .header-search { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 8px; background: rgba(255,255,255,0.1); }
  .header-nav-wrap { position: fixed; top: 56px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); transform: translateY(-120%); transition: transform 0.35s ease; z-index: 99; box-shadow: var(--shadow); }
  .header-nav-wrap.open { transform: translateY(0); }
  .main-nav { flex-direction: column; gap: 0; padding: 16px; height: auto; max-height: calc(100vh - 56px); overflow-y: auto; }
  .main-nav > a { width: 100%; padding: 14px 20px; border-radius: 10px; font-size: 15px; }
  .main-nav > a.active::after { display: none; }
  .nav-trend { margin-left: 0; padding-left: 0; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 12px; }
  .page-hero { padding: 56px 0 48px; }
  .page-hero h1 { font-size: 30px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item::after { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 22px; }
  .rank-item { padding: 16px 18px; gap: 14px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .news-grid { grid-template-columns: 1fr; gap: 20px; }
  .brand-name { font-size: 16px; }
  .hero-meta { gap: 14px; }
  .hero-meta div { font-size: 13px; }
  .hero-meta .hl { font-size: 17px; }
  .cta-section h2 { font-size: 24px; }
  .cta-actions .btn { width: 100%; }
  .feature-card { min-height: 260px; }
  .feature-content { padding: 22px; }
  .feature-content h3 { font-size: 18px; }
  .stat-num { font-size: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}