/* roulang page: index */
:root{
  --primary:#4f46e5;
  --primary-600:#4338ca;
  --primary-700:#3730a3;
  --primary-50:#eef2ff;
  --accent:#06b6d4;
  --accent-600:#0891b2;
  --dark:#0b1120;
  --dark-800:#111827;
  --dark-900:#0f172a;
  --bg:#f5f6fb;
  --card:#ffffff;
  --text:#1e293b;
  --text-weak:#64748b;
  --border:#e2e8f0;
  --radius:18px;
  --radius-lg:26px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --shadow-md:0 10px 35px rgba(15,23,42,.08);
  --shadow-lg:0 24px 70px rgba(15,23,42,.12);
  --space-section:104px;
  --max-width:1200px;
  --transition:all .28s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{display:block;max-width:100%}
button,input,textarea{font-family:inherit;font-size:inherit;border:none;outline:none}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0;position:relative}
.section-alt{background:#fff}
.section-soft{background:var(--bg)}
.section-header{text-align:center;max-width:680px;margin:0 auto 56px}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--primary-50);color:var(--primary);
  font-size:13px;font-weight:600;
  padding:7px 18px;border-radius:30px;margin-bottom:16px;
  letter-spacing:.5px;
}
.section-tag i{font-size:12px}
.section-title{
  font-size:38px;font-weight:800;line-height:1.25;letter-spacing:-.5px;
  color:var(--dark);margin-bottom:16px;
}
.section-desc{font-size:17px;color:var(--text-weak);line-height:1.8}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(226,232,240,.7);
  box-shadow:0 2px 20px rgba(15,23,42,.04);
}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  min-height:76px;
  gap:20px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:6px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.brand-logo{
  font-size:24px;font-weight:800;letter-spacing:1px;
  color:var(--dark);text-align:center;
  display:flex;align-items:center;gap:10px;
  padding:6px 18px;border-radius:14px;
  transition:var(--transition);
}
.brand-logo:hover{background:var(--primary-50);color:var(--primary)}
.brand-logo .logo-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:16px;box-shadow:0 6px 18px rgba(79,70,229,.3);
}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  font-size:15px;font-weight:500;color:var(--text);
  padding:9px 16px;border-radius:10px;position:relative;
}
.nav-link i{font-size:13px;color:var(--text-weak);transition:var(--transition)}
.nav-link:hover{background:var(--primary-50);color:var(--primary)}
.nav-link:hover i{color:var(--primary)}
.nav-link.active{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(79,70,229,.3)}
.nav-link.active i{color:#fff}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--bg);color:var(--dark);font-size:18px;
  cursor:pointer;align-items:center;justify-content:center;
  transition:var(--transition);
}
.nav-toggle:hover{background:var(--primary-50);color:var(--primary)}
.mobile-menu{
  display:none;
  flex-direction:column;padding:12px 24px 20px;
  background:#fff;border-top:1px solid var(--border);
}
.mobile-menu.open{display:flex}
.mobile-link{
  padding:13px 14px;border-radius:10px;font-size:15px;font-weight:500;
  color:var(--text);display:flex;align-items:center;gap:10px;
}
.mobile-link i{color:var(--text-weak);font-size:14px}
.mobile-link:hover{background:var(--primary-50);color:var(--primary)}
.mobile-link.active{background:var(--primary);color:#fff}
.mobile-link.active i{color:#fff}

/* ===== Hero ===== */
.hero{
  position:relative;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:150px 0 180px;color:#fff;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(11,17,32,.92) 20%,rgba(79,70,229,.72) 70%,rgba(6,182,212,.5));
}
.hero::after{
  content:'';position:absolute;bottom:-2px;left:0;right:0;height:80px;
  background:var(--bg);clip-path:polygon(0 100%,100% 0,100% 100%,0 100%);
}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:800px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.22);
  padding:9px 22px;border-radius:40px;font-size:14px;font-weight:500;
  margin-bottom:28px;backdrop-filter:blur(8px);
}
.hero-badge i{color:#67e8f9}
.hero h1{
  font-size:56px;font-weight:900;line-height:1.15;
  letter-spacing:1px;margin-bottom:22px;
  text-shadow:0 4px 30px rgba(0,0,0,.3);
}
.hero-sub{
  font-size:19px;line-height:1.9;color:rgba(255,255,255,.88);
  max-width:620px;margin:0 auto 42px;
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:16px;font-weight:600;padding:14px 30px;border-radius:14px;
  cursor:pointer;transition:var(--transition);
  border:2px solid transparent;line-height:1.2;
}
.btn i{font-size:14px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 30px rgba(79,70,229,.35)}
.btn-primary:hover{background:var(--primary-600);transform:translateY(-3px);box-shadow:0 16px 40px rgba(79,70,229,.45)}
.btn-ghost{
  background:rgba(255,255,255,.1);color:#fff;
  border-color:rgba(255,255,255,.35);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.6);transform:translateY(-3px)}
.btn-light{background:#fff;color:var(--dark);box-shadow:0 8px 25px rgba(0,0,0,.15)}
.btn-light:hover{background:var(--primary-50);transform:translateY(-3px)}
.btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* ===== Stats ===== */
.stats{
  position:relative;z-index:5;
  margin-top:-70px;padding-bottom:30px;
}
.stats-grid{
  background:#fff;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:repeat(4,1fr);
  overflow:hidden;
}
.stat-card{
  padding:38px 30px;text-align:center;position:relative;
  transition:var(--transition);
}
.stat-card:not(:last-child){border-right:1px solid var(--border)}
.stat-card:hover{background:var(--primary-50)}
.stat-num{
  font-size:42px;font-weight:900;color:var(--primary);
  line-height:1.2;margin-bottom:6px;letter-spacing:-1px;
}
.stat-text{font-size:14px;color:var(--text-weak);font-weight:500}

/* ===== Features ===== */
.features-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
}
.feature-card{
  background:var(--card);border-radius:var(--radius);
  padding:36px 32px;border:1px solid var(--border);
  box-shadow:var(--shadow-sm);transition:var(--transition);
  position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:var(--transition);
}
.feature-card:hover{
  transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent;
}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:54px;height:54px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;color:#fff;margin-bottom:22px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 8px 24px rgba(79,70,229,.3);
}
.feature-card h3{font-size:19px;font-weight:700;margin-bottom:12px;color:var(--dark)}
.feature-card p{font-size:15px;color:var(--text-weak);line-height:1.75}

/* ===== Categories ===== */
.categories-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.category-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  display:block;min-height:310px;box-shadow:var(--shadow-md);
  transition:var(--transition);
}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.category-card img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .6s ease;
}
.category-card:hover img{transform:scale(1.06)}
.category-overlay{
  position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(11,17,32,.15) 0%,rgba(11,17,32,.55) 55%,rgba(15,23,42,.9) 100%);
}
.category-info{position:absolute;left:0;right:0;bottom:0;padding:34px;color:#fff;z-index:2}
.category-info .cat-label{
  display:inline-flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  padding:6px 14px;border-radius:30px;font-size:12px;font-weight:500;
  margin-bottom:14px;backdrop-filter:blur(6px);
}
.category-info h3{font-size:26px;font-weight:800;margin-bottom:8px}
.category-info p{font-size:15px;color:rgba(255,255,255,.82);max-width:360px;line-height:1.7}
.category-link{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;font-size:14px;font-weight:600;color:#fff;
  border-bottom:2px solid rgba(255,255,255,.4);padding-bottom:3px;
}
.category-link i{transition:transform .3s ease}
.category-card:hover .category-link i{transform:translateX(5px)}

/* ===== Latest / Post list ===== */
.latest-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.post-card{
  background:var(--card);border-radius:var(--radius);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
  padding:28px 30px;transition:var(--transition);
  display:flex;flex-direction:column;
}
.post-card:hover{
  transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:transparent;
}
.post-tag{
  align-self:flex-start;
  background:var(--primary-50);color:var(--primary);
  font-size:12px;font-weight:600;padding:5px 14px;border-radius:20px;
  margin-bottom:14px;
}
.post-title{font-size:19px;font-weight:700;line-height:1.5;margin-bottom:10px}
.post-title a{color:var(--dark)}
.post-title a:hover{color:var(--primary)}
.post-desc{
  font-size:14px;color:var(--text-weak);line-height:1.75;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:16px;
}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--border);padding-top:16px;
}
.post-date{font-size:13px;color:var(--text-weak);display:flex;align-items:center;gap:7px}
.post-link{font-size:13px;font-weight:600;color:var(--primary);display:flex;align-items:center;gap:6px}
.post-link i{transition:transform .3s ease}
.post-card:hover .post-link i{transform:translateX(4px)}
.empty-box{
  grid-column:1/-1;background:#fff;border:2px dashed var(--border);
  border-radius:var(--radius);padding:60px 30px;text-align:center;
  color:var(--text-weak);font-size:16px;
}
.empty-box i{font-size:36px;color:#cbd5e1;margin-bottom:14px;display:block}

/* ===== Featured ===== */
.featured-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.featured-card{
  background:var(--card);border-radius:var(--radius-lg);
  overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--shadow-sm);transition:var(--transition);
  display:flex;flex-direction:column;
}
.featured-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.featured-img{position:relative;height:220px;overflow:hidden}
.featured-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.featured-card:hover .featured-img img{transform:scale(1.05)}
.featured-tag{
  position:absolute;top:16px;left:16px;
  background:rgba(15,23,42,.78);color:#fff;
  font-size:12px;font-weight:600;padding:6px 14px;border-radius:20px;
  backdrop-filter:blur(6px);
}
.featured-body{padding:28px;display:flex;flex-direction:column;flex:1}
.featured-body h3{font-size:20px;font-weight:700;margin-bottom:10px;color:var(--dark)}
.featured-body p{font-size:14px;color:var(--text-weak);line-height:1.75;flex:1;margin-bottom:18px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.text-link i{transition:transform .3s ease}
.text-link:hover{color:var(--primary-600)}
.text-link:hover i{transform:translateX(5px)}

/* ===== Steps ===== */
.steps-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.step-card{
  background:#fff;border-radius:var(--radius);padding:38px 28px;
  text-align:center;border:1px solid var(--border);
  box-shadow:var(--shadow-sm);position:relative;transition:var(--transition);
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.step-num{
  width:52px;height:52px;margin:0 auto 22px;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 8px 24px rgba(79,70,229,.3);
}
.step-card h3{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--dark)}
.step-card p{font-size:14px;color:var(--text-weak);line-height:1.75}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:#fff;border-radius:var(--radius);
  border:1px solid var(--border);margin-bottom:16px;
  overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);
}
.faq-item:hover{border-color:var(--primary-50);box-shadow:var(--shadow-md)}
.faq-item.active{border-color:transparent;box-shadow:var(--shadow-md)}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:22px 26px;font-size:16px;font-weight:600;color:var(--dark);
  background:transparent;cursor:pointer;text-align:left;gap:16px;
}
.faq-question i{color:var(--text-weak);font-size:14px;transition:transform .3s ease;flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg);color:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 26px}
.faq-answer p{padding-bottom:22px;font-size:15px;color:var(--text-weak);line-height:1.85}

/* ===== CTA ===== */
.cta{
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  position:relative;padding:110px 0;color:#fff;text-align:center;
}
.cta::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(11,17,32,.92),rgba(79,70,229,.8),rgba(6,182,212,.6));
}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.cta-title{font-size:38px;font-weight:900;line-height:1.3;margin-bottom:16px;letter-spacing:.5px}
.cta-desc{font-size:17px;color:rgba(255,255,255,.85);line-height:1.85;margin-bottom:36px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{
  background:var(--dark-900);color:rgba(255,255,255,.75);
  padding:70px 0 0;position:relative;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:48px;
  padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{font-size:24px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .logo-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  font-size:15px;color:#fff;
}
.footer-desc{font-size:14px;line-height:1.8;max-width:320px}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:20px;letter-spacing:.5px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-links a{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14px;color:rgba(255,255,255,.7);transition:var(--transition);
}
.footer-links a i{font-size:10px;color:var(--accent)}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:14px}
.footer-contact li{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.7}
.footer-contact i{color:var(--accent);margin-top:3px;font-size:15px}
.footer-bottom{
  padding:26px 0;display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#fff}

/* ===== Responsive ===== */
@media (max-width:1024px){
  :root{--space-section:80px}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:46px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-card:nth-child(2){border-right:none}
  .stat-card:nth-child(1),.stat-card:nth-child(2){border-bottom:1px solid var(--border)}
}
@media (max-width:900px){
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:flex}
  .nav-inner{grid-template-columns:1fr auto 1fr}
  .brand-logo{justify-self:center}
  .nav-toggle{justify-self:end;grid-column:3}
  .mobile-menu{display:none}
  .mobile-menu.open{display:flex}
  .categories-grid{grid-template-columns:1fr}
  .featured-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--space-section:64px}
  .container{padding:0 18px}
  .section-title{font-size:28px}
  .section-desc{font-size:15px}
  .hero{padding:110px 0 140px}
  .hero h1{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .features-grid{grid-template-columns:1fr}
  .latest-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:2fr}
  .stat-card{border-right:none!important;border-bottom:1px solid var(--border)}
  .stat-card:last-child{border-bottom:none}
  .stat-num{font-size:32px}
  .cta-title{font-size:28px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .featured-body h3{font-size:17px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root {
  --primary: #0d1b2a;
  --primary-light: #1b2a41;
  --primary-dark: #08111c;
  --accent: #f0a500;
  --accent-hover: #ffbc33;
  --accent-light: rgba(240, 165, 0, .12);
  --bg-body: #f5f7fb;
  --bg-white: #ffffff;
  --bg-dark: #0d1b2a;
  --bg-card: #ffffff;
  --text-main: #16181d;
  --text-body: #3d4351;
  --text-weak: #7a8194;
  --text-light: #e8edf5;
  --border-light: #e6e9f0;
  --border-dark: rgba(255, 255, 255, .12);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(13, 27, 42, .05);
  --shadow: 0 8px 30px rgba(13, 27, 42, .08);
  --shadow-lg: 0 16px 48px rgba(13, 27, 42, .14);
  --transition: all .3s cubic-bezier(.4, 0, .2, 1);
  --container-w: 1200px;
  --space-section: 92px;
}

/* ============ Reset / Base ============ */
*, *::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;
  color: var(--text-body);
  background: var(--bg-body);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }

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

/* ============ Header / Nav ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 20px rgba(13, 27, 42, .04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  height: 68px;
}
.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-left { order: 1; }
.nav-center { order: 2; }
.nav-right { order: 3; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .5px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #ffbe3d);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  box-shadow: 0 4px 14px rgba(240, 165, 0, .35);
}
.logo span:last-child { font-size: 18px; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link i { font-size: 13px; }
.nav-link:hover {
  color: var(--primary);
  background: rgba(13, 27, 42, .05);
}
.nav-link.active {
  color: var(--accent);
  background: var(--accent-light);
  font-weight: 600;
}
.nav-link.active i { color: var(--accent); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  background: rgba(13, 27, 42, .05);
  transition: var(--transition);
  order: 0;
}
.nav-toggle:hover { background: rgba(13, 27, 42, .1); }

/* ============ Main 公共 ============ */
main { padding-top: 68px; }

/* ============ Page Hero ============ */
.page-hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 120px 0 100px;
  text-align: center;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 17, 28, .88), rgba(13, 27, 42, .72), rgba(13, 27, 42, .82));
}
.page-hero .container { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 30px;
  background: rgba(240, 165, 0, .16);
  border: 1px solid rgba(240, 165, 0, .3);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 20px;
}
.hero-badge i { font-size: 12px; }

.page-hero h1 {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.page-hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.page-hero p {
  max-width: 640px;
  margin: 0 auto 34px;
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
  opacity: .92;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.btn i { font-size: 14px; transition: transform .3s ease; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ffbe3d);
  color: var(--primary-dark);
  box-shadow: 0 6px 24px rgba(240, 165, 0, .35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 34px rgba(240, 165, 0, .45);
}
.btn-primary:hover i { transform: translateX(3px); }
.btn-outline-light {
  border: 1px solid rgba(255, 255, 255, .35);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .6);
  transform: translateY(-2px);
}

/* ============ 页面面包屑 ============ */
.breadcrumb {
  padding: 14px 0;
  background: transparent;
}
.breadcrumb ul {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
}
.breadcrumb a { color: var(--text-weak); transition: color .3s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 10px; color: #bfc5d1; }

/* ============ Section 通用 ============ */
.section {
  padding: var(--space-section) 0;
}
.section-alt { background: var(--bg-white); }
.section-head {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 50px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  border-radius: 30px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.25;
}
.section-head p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.7;
}

/* ============ 数据指标 ============ */
.stats-section {
  padding: 0;
  margin-top: -60px;
  position: relative;
  z-index: 5;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.stat-card::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-light);
  top: -24px;
  right: -24px;
  opacity: .4;
  transition: var(--transition);
}
.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.stat-card:hover::after { transform: scale(1.4); opacity: .6; }
.stat-num {
  position: relative;
  z-index: 1;
  display: block;
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-num span { color: var(--accent); }
.stat-label {
  position: relative;
  z-index: 1;
  font-size: 14px;
  color: var(--text-weak);
  font-weight: 500;
}

/* ============ 资讯卡片 ============ */
.news-section { padding: 70px 0 92px; }
.news-grid {
  display: grid;
  gap: 28px;
}
.news-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.news-thumb {
  position: relative;
  overflow: hidden;
  min-height: 210px;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 27, 42, .18), transparent);
}
.news-body {
  padding: 30px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
}
.badge-blue {
  background: rgba(13, 27, 42, .08);
  color: var(--primary);
}
.news-meta time {
  font-size: 13px;
  color: var(--text-weak);
}
.news-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 16px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}
.text-link:hover { color: var(--accent-hover); gap: 10px; }
.text-link i { font-size: 13px; }

/* ============ 时间线 ============ */
.timeline-section {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
  padding: 92px 0;
}
.timeline-section::before {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(240, 165, 0, .12), transparent 70%);
  top: -120px;
  right: -80px;
}
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255, 255, 255, .6); }

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), rgba(240, 165, 0, .2));
}
.timeline-item {
  position: relative;
  padding: 24px 0 24px 40px;
  animation: fadeUp .6s ease both;
}
.timeline-item:nth-child(1) { animation-delay: .1s; }
.timeline-item:nth-child(2) { animation-delay: .2s; }
.timeline-item:nth-child(3) { animation-delay: .3s; }
.timeline-item:nth-child(4) { animation-delay: .4s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.timeline-dot {
  position: absolute;
  left: 0;
  top: 30px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 6px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(240, 165, 0, .2);
  z-index: 1;
}
.timeline-date {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  background: rgba(240, 165, 0, .16);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}
.timeline-item h3 {
  font-size: 18px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 6px;
}
.timeline-item p {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  line-height: 1.6;
}

/* ============ 热门主题 ============ */
.topics-section { padding: 92px 0; }
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.topic-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.topic-card i {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.topic-card span {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
}
.topic-card p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.5;
  margin: 0;
}
.topic-card:hover {
  transform: translateY(-5px);
  border-color: rgba(240, 165, 0, .4);
  box-shadow: var(--shadow);
}
.topic-card:hover i {
  background: var(--accent);
  color: #fff;
  transform: scale(1.08);
}

/* ============ FAQ ============ */
.faq-section {
  background: var(--bg-white);
  padding: 92px 0;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  background: var(--bg-body);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active {
  border-color: rgba(240, 165, 0, .4);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  text-align: left;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question i {
  font-size: 14px;
  color: var(--text-weak);
  transition: transform .35s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer p {
  padding: 0 22px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-weak);
}
.faq-item.active .faq-answer { max-height: 300px; }

/* ============ CTA ============ */
.cta-section {
  padding: 92px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(240, 165, 0, .2), transparent 70%);
  right: -100px;
  bottom: -180px;
}
.cta-box {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-box h2 {
  font-size: clamp(24px, 3.4vw, 36px);
  color: #fff;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  font-size: 15px;
  color: rgba(255, 255, 255, .7);
  margin-bottom: 32px;
  line-height: 1.7;
}
.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 24px rgba(255, 255, 255, .15);
}
.btn-light:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(255, 255, 255, .25);
}
.btn-light:hover i { transform: translateX(3px); }

/* ============ Footer ============ */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, .75);
  padding: 64px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 44px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #ffbe3d);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(240, 165, 0, .25);
}
.footer-brand span {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .55);
  max-width: 340px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-title::after {
  content: '';
  width: 22px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  transition: var(--transition);
}
.footer-links a i { font-size: 12px; color: var(--accent); transition: transform .3s; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-links a:hover i { transform: translateX(3px); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
}
.footer-contact li i {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .06);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--accent);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, .4);
}
.footer-bottom a { color: rgba(255, 255, 255, .6); transition: color .3s; }
.footer-bottom a:hover { color: var(--accent); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  :root { --space-section: 76px; }
  .nav-link { padding: 8px 12px; font-size: 13px; }
  .logo span:last-child { font-size: 16px; }
  .stats-grid { gap: 16px; }
  .stat-num { font-size: 36px; }
  .news-card { grid-template-columns: 260px 1fr; }
  .news-body { padding: 24px; }
  .footer-grid { gap: 32px; }
}

@media (max-width: 768px) {
  .site-header { position: relative; }
  main { padding-top: 0; }
  .header-inner { flex-wrap: wrap; }
  .logo {
    position: static;
    transform: none;
    order: 1;
    margin: 0 auto;
    font-size: 17px;
  }
  .logo-mark {
    width: 32px;
    height: 32px;
    font-size: 13px;
    border-radius: 8px;
  }
  .logo span:last-child { font-size: 16px; }
  .nav-toggle { display: inline-flex; order: 0; }
  .nav-left, .nav-right {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    order: 3;
    padding: 12px 0 16px;
    border-top: 1px solid var(--border-light);
    margin-top: 8px;
  }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }
  .site-header.nav-open .nav-left,
  .site-header.nav-open .nav-right { display: flex; }

  .page-hero { padding: 80px 0 90px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero p { font-size: 15px; }

  .stats-section { margin-top: -50px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .stat-card { padding: 22px 18px; }
  .stat-num { font-size: 32px; }

  .news-card { grid-template-columns: 1fr; }
  .news-thumb { min-height: 200px; }
  .news-body { padding: 20px 20px 24px; }

  .timeline-section { padding: 72px 0; }
  .timeline { padding-left: 36px; }
  .timeline-item { padding-left: 30px; }

  .topics-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .topic-card { padding: 22px 16px; }

  .faq-section, .cta-section, .news-section, .topics-section { padding: 70px 0; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .header-inner { height: 62px; }
  .logo { font-size: 15px; }
  .logo .logo-mark { width: 30px; height: 30px; font-size: 12px; }

  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .page-hero p { font-size: 14px; }

  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-num { font-size: 28px; }
  .stat-label { font-size: 13px; }

  .news-meta { gap: 8px; }
  .news-body h3 { font-size: 17px; }

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

  .timeline { padding-left: 32px; }
  .timeline-item { padding-left: 24px; padding-right: 0; }

  .faq-question { padding: 15px 16px; font-size: 14px; }
  .faq-answer p { padding: 0 16px 16px; }

  .cta-box h2 { font-size: 23px; }
  .cta-box p { font-size: 14px; }

  .footer-bottom span { display: block; line-height: 1.8; }
}

/* roulang page: article */
:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #6366f1;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --light: #f8fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 10px 30px rgba(15,23,42,0.08);
  --shadow-lg: 0 24px 60px rgba(15,23,42,0.12);
  --gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  --section-pad: 88px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
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(--white);
}
a { text-decoration: none; color: inherit; }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; }
button { cursor: pointer; border: none; background: none; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(79,70,229,0.35);
  outline-offset: 2px;
  border-radius: 6px;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226,232,240,0.8);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 8px 30px rgba(15,23,42,0.08); }
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 76px;
  gap: 20px;
}
.nav-left { display: flex; align-items: center; gap: 6px; }
.nav-right { display: flex; align-items: center; justify-content: flex-end; gap: 6px; }
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: opacity .3s ease;
}
.logo:hover { opacity: 0.85; color: var(--text); }
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--gradient);
  color: #fff;
  font-size: 16px;
  box-shadow: 0 6px 16px rgba(79,70,229,0.35);
}
.logo-text { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all .25s ease;
}
.nav-link i { font-size: 13px; }
.nav-link:hover { color: var(--primary); background: rgba(79,70,229,0.08); }
.nav-link.active { color: var(--primary); background: rgba(79,70,229,0.12); font-weight: 600; }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--light);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
  transition: all .25s ease;
}
.nav-toggle:hover { background: #eef2ff; color: var(--primary); }
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 12px 20px 20px;
  gap: 8px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link { border-radius: 12px; padding: 12px 16px; background: var(--light); }
.mobile-menu .nav-link.active { background: rgba(79,70,229,0.1); }

.article-hero {
  position: relative;
  background: var(--dark) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 110px 0 80px;
  color: #fff;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,27,75,0.78) 60%, rgba(6,182,212,0.35) 100%);
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.85); transition: color .3s ease; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { font-size: 11px; color: rgba(255,255,255,0.5); }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: #fff;
  margin-bottom: 18px;
}
.hero-badge i { color: var(--accent-light); }
.article-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  max-width: 860px;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
  overflow-wrap: break-word;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  color: rgba(255,255,255,0.75);
  font-size: 14px;
}
.article-meta span { display: inline-flex; align-items: center; gap: 8px; }
.article-meta i { color: var(--accent-light); }

.article-body { padding: var(--section-pad) 0; background: var(--light); }
.body-grid { display: grid; grid-template-columns: minmax(0,1fr) 360px; gap: 48px; align-items: start; }
.content-wrap { min-width: 0; }
.content-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.article-content { font-size: 16.5px; line-height: 1.9; color: var(--text); }
.article-content > * + * { margin-top: 1.4em; }
.article-content h1, .article-content h2 { font-size: 24px; font-weight: 700; margin-top: 1.8em; padding-bottom: 12px; border-bottom: 2px solid var(--border); }
.article-content h3 { font-size: 20px; font-weight: 700; margin-top: 1.6em; }
.article-content p { color: #334155; }
.article-content ul, .article-content ol { padding-left: 1.4em; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.5em; }
.article-content li::marker { color: var(--primary); }
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: #f1f5f9;
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  color: #475569;
  font-style: italic;
}
.article-content img { border-radius: var(--radius); box-shadow: var(--shadow); margin: 1.6em 0; }
.article-content a { color: var(--primary); font-weight: 500; border-bottom: 1px solid rgba(79,70,229,0.3); transition: all .25s ease; }
.article-content a:hover { border-color: var(--primary); }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: 15px; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.article-content th { background: var(--light); font-weight: 600; }
.article-content iframe { max-width: 100%; border-radius: var(--radius); }

.article-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}
.tag-label { font-weight: 600; color: var(--text); font-size: 15px; margin-right: 4px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--light);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  transition: all .25s ease;
}
.tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(79,70,229,0.06); }
.tag i { font-size: 10px; color: var(--primary); }
.article-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: all .3s ease;
  border: 1px solid transparent;
}
.btn i { font-size: 13px; }
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 8px 20px rgba(79,70,229,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(79,70,229,0.4); color: #fff; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(79,70,229,0.04); transform: translateY(-2px); }
.btn-light { background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.35); color: #fff; backdrop-filter: blur(6px); }
.btn-light:hover { background: rgba(255,255,255,0.24); transform: translateY(-2px); color: #fff; }

.sidebar { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 28px; }
.side-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.side-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.side-card h3 i {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  background: rgba(79,70,229,0.1);
  color: var(--primary);
  font-size: 14px;
}
.side-about p { font-size: 14.5px; color: var(--text-muted); line-height: 1.8; }
.side-links { display: flex; flex-direction: column; gap: 4px; }
.side-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: all .25s ease;
}
.side-links a i { width: 24px; color: var(--text-muted); font-size: 13px; transition: all .25s ease; }
.side-links a:hover { background: rgba(79,70,229,0.06); color: var(--primary); }
.side-links a:hover i { color: var(--primary); }
.side-list { display: flex; flex-direction: column; gap: 2px; }
.side-list-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  transition: background .25s ease;
}
.side-list-item:last-child { border-bottom: none; }
.side-list-item .num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(79,70,229,0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}
.side-list-item .info { min-width: 0; }
.side-list-item .title {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .25s ease;
}
.side-list-item:hover .title { color: var(--primary); }
.side-list-item .date { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.side-empty { font-size: 14px; color: var(--text-muted); padding: 10px 0; }
.side-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.related-section { padding: var(--section-pad) 0; background: #fff; }
.section-header { text-align: center; margin-bottom: 44px; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(79,70,229,0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}
.section-eyebrow i { font-size: 12px; }
.section-header h2 { font-size: 34px; font-weight: 800; letter-spacing: 0.5px; }
.section-header p { color: var(--text-muted); font-size: 15px; margin-top: 10px; }
.related-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.related-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .35s ease;
  display: flex;
  flex-direction: column;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.relate-img { aspect-ratio: 16/9; overflow: hidden; }
.relate-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .relate-img img { transform: scale(1.06); }
.relate-body { padding: 20px 22px 26px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.relate-cat { font-size: 12px; font-weight: 600; color: var(--primary); letter-spacing: 0.5px; }
.relate-cat i { font-size: 11px; margin-right: 3px; }
.relate-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .3s ease;
}
.related-card:hover .relate-title { color: var(--primary); }
.relate-meta { margin-top: auto; font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.relate-meta i { font-size: 12px; }
.related-empty {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-muted);
  font-size: 15px;
  background: var(--light);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}

.faq-section { padding: var(--section-pad) 0; background: var(--light); }
.faq-grid { max-width: 800px; margin: 44px auto 0; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: box-shadow .3s ease; }
.faq-item.open { box-shadow: var(--shadow); border-color: rgba(79,70,229,0.3); }
.faq-q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  color: var(--text);
  transition: color .25s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-q .faq-label { display: inline-flex; align-items: center; gap: 10px; }
.faq-q .faq-label i { color: var(--primary); transition: transform .3s ease; }
.faq-item.open .faq-label i { transform: rotate(90deg); }
.faq-arrow { color: var(--primary); transition: transform .3s ease; font-size: 14px; margin-left: auto; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  transition: max-height .35s ease, padding .35s ease;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 26px 24px; }

.cta-section {
  position: relative;
  padding: 90px 0;
  background: var(--dark) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,23,42,0.82); }
.cta-inner { position: relative; z-index: 2; }
.cta-inner h2 { font-size: 34px; font-weight: 800; margin-bottom: 16px; }
.cta-inner p { max-width: 560px; margin: 0 auto 34px; color: rgba(255,255,255,0.8); font-size: 16px; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-btns .btn-light { background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.35); color: #fff; backdrop-filter: blur(6px); }
.cta-btns .btn-light:hover { background: rgba(255,255,255,0.24); transform: translateY(-2px); color: #fff; }

.not-found-box { text-align: center; padding: 60px 30px; }
.not-found-box i { font-size: 56px; color: var(--border); margin-bottom: 18px; }
.not-found-box h3 { font-size: 20px; margin-bottom: 12px; }
.not-found-box p { color: var(--text-muted); margin-bottom: 24px; }

.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-brand .logo-mark { width: 36px; height: 36px; font-size: 15px; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.55); max-width: 340px; }
.footer-title { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; letter-spacing: 1px; }
.footer-links, .footer-contact { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255,255,255,0.6); transition: all .3s ease; }
.footer-links a i { font-size: 11px; color: var(--accent); }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.6); }
.footer-contact li i { width: 18px; color: var(--accent); font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 13px; color: rgba(255,255,255,0.45); flex-wrap: wrap; }
.footer-bottom a { color: rgba(255,255,255,0.65); transition: color .3s ease; }
.footer-bottom a:hover { color: #fff; }

@media (max-width: 1024px) {
  :root { --section-pad: 72px; }
  .body-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .side-card { flex: 1 1 calc(50% - 14px); }
  .related-grid { grid-template-columns: repeat(2,1fr); }
  .article-hero h1 { font-size: 36px; }
}
@media (max-width: 860px) {
  .header-inner { display: flex; justify-content: space-between; height: 68px; gap: 0; }
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: inline-flex; }
  .logo { order: 1; font-size: 20px; }
  .nav-toggle { order: 2; }
  .mobile-menu { display: none; }
  .mobile-menu.open { display: flex; }
  .article-hero { padding: 80px 0 56px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 640px) {
  :root { --section-pad: 60px; }
  body { font-size: 15px; }
  .content-card { padding: 26px 20px; }
  .article-hero h1 { font-size: 27px; }
  .article-meta { gap: 14px; flex-direction: column; align-items: flex-start; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .side-card { flex: 1 1 100%; }
  .article-body .container, .related-section .container, .faq-section .container, .cta-section .container { padding: 0 18px; }
  .cta-inner h2 { font-size: 26px; }
  .section-header h2 { font-size: 26px; }
  .faq-q { padding: 18px 20px; font-size: 15px; }
  .faq-a { padding: 0 20px; }
  .faq-item.open .faq-a { padding: 0 20px 20px; }
}
@media (max-width: 520px) {
  .article-body, .related-section, .faq-section, .cta-section { padding: 50px 0; }
  .content-card { padding: 22px 16px; box-shadow: none; }
  .btn { width: 100%; }
  .article-actions .btn { width: 100%; }
  .hero-badge { font-size: 12px; padding: 5px 12px; }
  .breadcrumb { font-size: 13px; }
  .cta-btns .btn { width: 100%; }
  .logo { font-size: 18px; }
  .logo-mark { width: 32px; height: 32px; font-size: 13px; }
}

/* roulang page: category2 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #60a5fa;
  --accent: #f59e0b;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --bg: #f8fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(2, 6, 23, 0.08);
  --shadow-lg: 0 12px 40px rgba(2, 6, 23, 0.12);
  --space: 120px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  position: relative;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--dark);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  transition: opacity .2s;
}
.logo:hover { opacity: .85; }
.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.nav-left, .nav-right { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 12px;
  color: var(--text-light);
  font-weight: 600;
  font-size: 15px;
  transition: all .25s;
}
.nav-link i { font-size: 14px; }
.nav-link:hover { color: var(--primary); background: rgba(37, 99, 235, 0.06); }
.nav-link.active { color: var(--primary); background: rgba(37, 99, 235, 0.10); }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  color: var(--dark);
  font-size: 20px;
  transition: background .2s;
}
.menu-toggle:hover { background: rgba(15, 23, 42, 0.06); }
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 20px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 12px;
  font-weight: 600;
  color: var(--text);
  font-size: 16px;
  transition: background .2s;
}
.mobile-link:hover { background: var(--bg); }
.mobile-link.active { color: var(--primary); background: rgba(37, 99, 235, 0.08); }

/* Hero */
.category-hero {
  position: relative;
  padding: 130px 0 120px;
  background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
  color: #fff;
  overflow: hidden;
}
.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.88) 55%, rgba(37, 99, 235, 0.55) 100%);
}
.category-hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.22) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 820px; margin: 0 auto; }
.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);
  color: #fff;
  padding: 8px 22px;
  border-radius: 32px;
  font-size: 14px;
  font-weight: 500;
  backdrop-filter: blur(8px);
  margin-bottom: 26px;
}
.hero-badge i { color: var(--accent); }
.category-hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.category-hero h1 span {
  background: linear-gradient(135deg, #93c5fd, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.category-hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.88);
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all .3s;
}
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(37, 99, 235, 0.5); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-light {
  background: var(--white);
  color: var(--primary-dark);
  border: 2px solid var(--white);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
.btn-light:hover { background: #f1f5f9; transform: translateY(-2px); }

/* Stats */
.stats-section {
  position: relative;
  z-index: 5;
  margin-top: -56px;
  padding-bottom: 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  text-align: center;
  transition: transform .3s, box-shadow .3s;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-icon { width: 48px; height: 48px; margin: 0 auto 14px; background: rgba(37, 99, 235, 0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 20px; }
.stat-num {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 14px; color: var(--text-light); margin-top: 6px; font-weight: 500; }

/* Section */
.section { padding: var(--space) 0; }
.section-alt { background: var(--white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 56px; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 32px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.section-title { font-size: 36px; font-weight: 800; color: var(--dark); line-height: 1.3; margin: 14px 0 14px; }
.section-desc { color: var(--text-light); font-size: 16px; line-height: 1.8; }

/* Steps */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
  transition: transform .3s, box-shadow .3s;
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step-num { font-size: 48px; font-weight: 800; color: rgba(37, 99, 235, 0.14); line-height: 1; }
.step-icon {
  position: absolute;
  top: 28px;
  right: 26px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.step-card h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin: 18px 0 8px; }
.step-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* Content Cards */
.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.content-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.content-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.content-card-img { position: relative; height: 220px; overflow: hidden; }
.content-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.content-card:hover .content-card-img img { transform: scale(1.05); }
.content-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent 60%);
}
.content-card-body { padding: 24px; }
.card-tag {
  display: inline-block;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}
.content-card-body h3 { font-size: 18px; font-weight: 700; color: var(--dark); line-height: 1.4; margin-bottom: 8px; }
.content-card-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .2s;
}
.card-link:hover { gap: 10px; }

/* Timeline */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 28px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 2px;
}
.timeline-item { position: relative; padding: 0 0 28px 24px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}
.timeline-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.timeline-content:hover { transform: translateX(4px); box-shadow: var(--shadow-lg); }
.timeline-content h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.timeline-content p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}
.faq-item.active { box-shadow: var(--shadow); border-color: rgba(37, 99, 235, 0.3); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  gap: 16px;
  transition: color .2s;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: transform .3s, background .3s;
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
  padding: 0 26px;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
}
.faq-answer-inner { padding-bottom: 22px; }

/* CTA */
.cta-section {
  position: relative;
  padding: 110px 0;
  background: var(--dark) url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
  overflow: hidden;
  text-align: center;
  color: #fff;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.8));
}
.cta-content { position: relative; z-index: 2; max-width: 680px; margin: 0 auto; }
.cta-section h2 { font-size: 38px; font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.cta-section p { color: rgba(255, 255, 255, 0.85); font-size: 17px; margin-bottom: 34px; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* Footer */
.site-footer { background: var(--dark); color: rgba(255, 255, 255, 0.75); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 360px; color: rgba(255, 255, 255, 0.6); }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  transition: color .2s, transform .2s;
}
.footer-links a:hover { color: var(--accent); transform: translateX(4px); }
.footer-links a i { font-size: 12px; color: var(--primary-light); }
.footer-contact { list-style: none; display: flex; flex-direction: column; gap: 12px; font-size: 14px; color: rgba(255, 255, 255, 0.65); }
.footer-contact i { width: 20px; color: var(--primary-light); margin-right: 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);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(255, 255, 255, 0.55); text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1024px) {
  :root { --space: 90px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: repeat(2, 1fr); }
  .category-hero h1 { font-size: 44px; }
  .nav-link { padding: 9px 14px; font-size: 14px; }
}
@media (max-width: 820px) {
  .nav-left, .nav-right { display: none; }
  .menu-toggle { display: inline-flex; }
  .logo { position: static; transform: none; }
  .header-inner { justify-content: space-between; }
}
@media (max-width: 768px) {
  :root { --space: 70px; }
  .category-hero { padding: 90px 0 100px; }
  .category-hero h1 { font-size: 36px; }
  .category-hero p { font-size: 16px; }
  .section-title { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .timeline { padding-left: 20px; }
  .timeline-item { padding-left: 16px; }
  .cta-section h2 { font-size: 30px; }
}
@media (max-width: 520px) {
  :root { --space: 56px; }
  .container { padding: 0 18px; }
  .category-hero h1 { font-size: 30px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .steps-grid { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .stat-num { font-size: 30px; }
  .section-title { font-size: 24px; }
  .faq-question { padding: 18px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px; font-size: 14px; }
  .cta-section h2 { font-size: 26px; }
  .logo { font-size: 19px; }
  .logo-mark { width: 34px; height: 34px; font-size: 15px; }
}