/* roulang page: index */
:root{
  --primary:#0f2470;
  --primary-2:#1e40af;
  --accent:#22d3ee;
  --accent-2:#818cf8;
  --warm:#fbbf24;
  --bg:#f2f6fc;
  --bg-dark:#0b1739;
  --card:#ffffff;
  --text:#14213d;
  --text-body:#3b4a6b;
  --muted:#8494b0;
  --border:#e1e8f4;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow:0 6px 30px rgba(14,27,61,.08);
  --shadow-lg:0 16px 50px rgba(14,27,61,.14);
  --container:1180px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:#fff}
.section-dark{background:var(--bg-dark);color:#fff}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,23,57,.92);backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:#fff;letter-spacing:.5px}
.brand-logo .logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-size:17px;color:#0b1739;box-shadow:0 0 18px rgba(34,211,238,.45)}
.brand-logo span{font-weight:400;font-size:15px;color:#a5b4fc;margin-left:2px}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  display:inline-block;padding:9px 18px;border-radius:999px;font-size:15px;font-weight:500;color:#c7d2fe;
  transition:all .25s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.1)}
.nav-link.active{color:#0b1739;background:linear-gradient(135deg,var(--accent),var(--accent-2));font-weight:700;box-shadow:0 2px 12px rgba(34,211,238,.35)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:999px;background:var(--warm);color:#14213d;
  font-weight:700;font-size:14px;transition:all .25s ease;box-shadow:0 4px 20px rgba(251,191,36,.3);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(251,191,36,.45);color:#0b1739}
.nav-toggle{display:none;background:none;border:none;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:4px;transition:all .3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{
  position:relative;background:linear-gradient(160deg,#0b1739 0%,#1e3a8a 55%,#1e1b4b 100%);
  padding:118px 0 100px;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.35;mix-blend-mode:screen;
}
.hero::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse at 75% 20%,rgba(34,211,238,.15),transparent 50%),
             radial-gradient(ellipse at 20% 80%,rgba(129,140,248,.12),transparent 50%);
}
.hero-content{position:relative;z-index:2;text-align:center;max-width:860px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 20px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#e0e7ff;
  font-size:14px;font-weight:500;backdrop-filter:blur(8px);margin-bottom:28px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:54px;font-weight:900;color:#fff;line-height:1.2;margin-bottom:20px;text-shadow:0 4px 30px rgba(0,0,0,.25)}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:18px;color:#c7d2fe;max-width:640px;margin:0 auto 36px;line-height:1.8}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 34px;border-radius:999px;font-size:16px;font-weight:700;transition:all .25s ease;border:2px solid transparent;
}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0b1739;box-shadow:0 6px 26px rgba(34,211,238,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(34,211,238,.5)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.3);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.6);transform:translateY(-3px)}
.hero-status{
  margin-top:44px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap;
}
.status-pill{
  padding:8px 18px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  color:#dbeafe;font-size:13px;display:flex;align-items:center;gap:8px;
}
.status-pill i{color:var(--accent)}
.status-pill strong{color:#fff;font-weight:700}

/* ===== Stats ===== */
.stats-section{margin-top:-56px;position:relative;z-index:5}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{
  background:var(--card);border-radius:var(--radius-md);padding:30px 24px;text-align:center;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.6);transition:all .3s ease;
}
.stat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.stat-num{font-size:40px;font-weight:900;background:linear-gradient(135deg,var(--primary-2),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2}
.stat-label{font-size:14px;color:var(--muted);margin-top:8px;font-weight:500}

/* ===== Section Heads ===== */
.section-head{text-align:center;max-width:700px;margin:0 auto 56px}
.section-tag{
  display:inline-block;padding:6px 18px;border-radius:999px;background:rgba(30,64,175,.08);
  color:var(--primary-2);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:16px;
}
.section-dark .section-tag{background:rgba(34,211,238,.15);color:var(--accent)}
.section-head h2{font-size:38px;font-weight:900;line-height:1.3;margin-bottom:14px}
.section-dark .section-head h2{color:#fff}
.section-head p{font-size:16px;color:var(--muted)}
.section-dark .section-head p{color:#a5b4fc}

/* ===== Core Services ===== */
.core-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.core-card{
  background:var(--card);border-radius:var(--radius-lg);padding:36px 28px;border:1px solid var(--border);
  box-shadow:var(--shadow);transition:all .3s ease;position:relative;overflow:hidden;
}
.core-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:0;transition:opacity .3s}
.core-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.core-card:hover::before{opacity:1}
.core-icon{
  width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:22px;
  margin-bottom:20px;color:#fff;
}
.core-icon.ic-1{background:linear-gradient(135deg,#0ea5e9,#6366f1)}
.core-icon.ic-2{background:linear-gradient(135deg,#f59e0b,#f97316)}
.core-icon.ic-3{background:linear-gradient(135deg,#10b981,#0ea5e9)}
.core-icon.ic-4{background:linear-gradient(135deg,#8b5cf6,#ec4899)}
.core-card h3{font-size:19px;font-weight:800;margin-bottom:12px}
.core-card p{font-size:14px;color:var(--text-body);line-height:1.7}

/* ===== Category Cards ===== */
.cat-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.cat-card{
  border-radius:var(--radius-lg);overflow:hidden;position:relative;min-height:280px;display:flex;align-items:flex-end;
  box-shadow:var(--shadow);transition:all .3s ease;border:1px solid var(--border);
}
.cat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.cat-card .cat-bg{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .6s ease}
.cat-card:hover .cat-bg{transform:scale(1.06)}
.cat-card .cat-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,23,57,.1) 0%,rgba(11,23,57,.85) 100%)}
.cat-card .cat-body{position:relative;z-index:2;padding:32px;color:#fff}
.cat-card .cat-body h3{font-size:28px;font-weight:900;margin-bottom:8px}
.cat-card .cat-body p{font-size:14px;color:#dbeafe;margin-bottom:18px;line-height:1.7}
.cat-link{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;border-radius:999px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.35);font-size:14px;font-weight:600;backdrop-filter:blur(4px);transition:all .25s}
.cat-link:hover{background:var(--accent);color:#0b1739;border-color:var(--accent)}

/* ===== News ===== */
.news-section{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:28px;
  transition:all .3s ease;position:relative;display:block;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--accent);background:#fff}
.news-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.news-badge{padding:4px 14px;border-radius:999px;background:rgba(30,64,175,.1);color:var(--primary-2);font-size:12px;font-weight:700}
.news-date{font-size:13px;color:var(--muted)}
.news-card h3{font-size:18px;font-weight:700;margin-bottom:10px;line-height:1.5}
.news-card p{font-size:14px;color:var(--text-body);margin-bottom:16px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-more{font-size:13px;font-weight:700;color:var(--primary-2);display:inline-flex;align-items:center;gap:6px}
.news-more i{transition:transform .2s}
.news-card:hover .news-more i{transform:translateX(4px)}
.empty-tip{grid-column:1/-1;text-align:center;padding:48px;color:var(--muted);background:var(--bg);border-radius:var(--radius-md);font-size:15px}

/* ===== Steps ===== */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;counter-reset:step}
.step-card{position:relative;padding:32px 24px;background:var(--card);border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:var(--shadow);text-align:center;transition:all .3s}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.step-num{
  width:52px;height:52px;border-radius:50%;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0b1739;font-weight:900;font-size:20px;box-shadow:0 4px 16px rgba(34,211,238,.3);
}
.step-card h3{font-size:18px;font-weight:800;margin-bottom:10px}
.step-card p{font-size:14px;color:var(--text-body);line-height:1.6}

/* ===== Feature Split ===== */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.feature-visual{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.feature-visual img{width:100%;height:360px;object-fit:cover}
.feature-visual::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(11,23,57,.3))}
.feature-content h2{font-size:34px;font-weight:900;line-height:1.3;margin-bottom:18px}
.feature-content > p{font-size:15px;color:var(--text-body);margin-bottom:28px;line-height:1.8}
.feature-list{list-style:none;display:flex;flex-direction:column;gap:16px}
.feature-list li{display:flex;gap:14px;align-items:flex-start}
.feature-list li i{width:28px;height:28px;border-radius:8px;background:rgba(34,211,238,.15);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0;margin-top:2px}
.feature-list li strong{display:block;font-size:15px}
.feature-list li span{font-size:14px;color:var(--muted);line-height:1.5}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:all .3s}
.faq-item.active{box-shadow:var(--shadow);border-color:rgba(34,211,238,.4)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;
  background:none;border:none;text-align:left;font-size:16px;font-weight:700;color:var(--text);transition:background .2s;
}
.faq-q:hover{background:rgba(30,64,175,.03)}
.faq-q i{color:var(--accent);transition:transform .3s;flex-shrink:0}
.faq-item.active .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s;padding:0 24px;font-size:14px;color:var(--text-body);line-height:1.8}
.faq-item.active .faq-a{max-height:200px;padding:0 24px 20px}

/* ===== CTA ===== */
.cta-section{position:relative;background:linear-gradient(150deg,#0b1739,#1e3a8a);padding:80px 0;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');background-size:cover;background-position:center;opacity:.2}
.cta-box{position:relative;text-align:center;max-width:660px;margin:0 auto}
.cta-box h2{font-size:36px;font-weight:900;color:#fff;margin-bottom:16px}
.cta-box p{font-size:16px;color:#c7d2fe;margin-bottom:34px}
.cta-box .btn-primary{font-size:17px;padding:16px 40px}

/* ===== Footer ===== */
.site-footer{background:#081226;color:#8494b0;padding:64px 0 0}
.footer-main{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .brand-logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;left:0;bottom:0;width:24px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;transition:color .2s,padding-left .2s}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.07);padding:24px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px}
.footer-bottom a{color:#a5b4fc}

/* ===== Mobile ===== */
@media(max-width:1024px){
  .core-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .feature-row{grid-template-columns:1fr;gap:40px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:74px;left:0;right:0;background:#0b1739;flex-direction:column;padding:20px;gap:8px;
    transform:translateY(-120%);transition:transform .3s ease;box-shadow:0 10px 30px rgba(0,0,0,.3);
    align-items:stretch;z-index:99;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .main-nav.open{transform:translateY(0)}
  .nav-link{padding:14px 20px;border-radius:12px;text-align:center}
  .nav-cta{display:none}
  .hero{padding:90px 0 80px}
  .hero h1{font-size:36px}
  .hero-desc{font-size:16px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:64px 0}
  .section-head h2{font-size:30px}
  .cat-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr 1fr;gap:16px}
  .footer-main{grid-template-columns:1fr;gap:30px}
  .cta-box h2{font-size:28px}
}
@media(max-width:520px){
  .core-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:12px}
  .stat-num{font-size:30px}
  .hero h1{font-size:30px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: category1 */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-deep: #1e1b4b;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
  --space: 24px;
  --header-h: 76px;
}
*,
*::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: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color .25s ease;
}
img {
  max-width: 100%;
  display: block;
}
button,
input {
  font: inherit;
  border: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 84px 0;
}
.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 17px;
  color: var(--text-weak);
  line-height: 1.8;
}
.center {
  text-align: center;
}
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}
.nav-wrap {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
}
.brand-logo span {
  color: var(--primary);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-size: 16px;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.35);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  transition: all .25s ease;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
  transition: all .3s ease;
}
.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.4);
  color: #fff;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: all .3s ease;
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  padding: 84px 0 110px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.86), rgba(30, 27, 75, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
}
.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 26px;
}
.hero-breadcrumb a:hover {
  color: var(--accent);
}
.hero-breadcrumb i {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.hero-title {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  max-width: 760px;
  margin-bottom: 18px;
}
.hero-title .accent-text {
  color: var(--accent);
}
.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 680px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.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;
  cursor: pointer;
  transition: all .3s ease;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(79, 70, 229, 0.42);
  color: #fff;
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 38px;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
}
.hero-meta-item i {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.14);
  color: var(--accent);
  font-size: 14px;
}

/* ===== Stats ===== */
.stats-bar {
  position: relative;
  z-index: 2;
  margin-top: -54px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
}
.stat-item {
  text-align: center;
  padding: 10px;
}
.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -1px;
  line-height: 1.1;
}
.stat-label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-weak);
}

/* ===== Feature Cards ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: all .35s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #c7d2fe;
}
.feature-icon {
  width: 50px;
  height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-size: 20px;
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 18px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ===== Steps ===== */
.steps-wrap {
  background: linear-gradient(135deg, var(--primary-deep), #312e81);
  border-radius: var(--radius-lg);
  padding: 56px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.steps-wrap::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.steps-wrap .section-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 38px;
  position: relative;
  z-index: 1;
}
.step-item {
  position: relative;
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px);
  transition: all .3s ease;
}
.step-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary-deep);
  font-weight: 800;
  font-size: 15px;
  margin-bottom: 16px;
}
.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
}

/* ===== Split Feature ===== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.split-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.split-media:hover img {
  transform: scale(1.03);
}
.split-content .section-tag {
  margin-bottom: 14px;
}
.split-list {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}
.split-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: all .25s ease;
}
.split-list li:hover {
  box-shadow: var(--shadow-sm);
  border-color: #c7d2fe;
}
.split-list i {
  margin-top: 4px;
  color: var(--primary);
  font-size: 16px;
}
.split-list strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
}
.split-list span {
  font-size: 14px;
  color: var(--text-weak);
}

/* ===== Tutorial Cards ===== */
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tutorial-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .35s ease;
}
.tutorial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}
.tutorial-thumb {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.tutorial-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.tutorial-card:hover .tutorial-thumb img {
  transform: scale(1.06);
}
.tutorial-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  backdrop-filter: blur(6px);
}
.tutorial-body {
  padding: 24px;
}
.tutorial-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.tutorial-body p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 16px;
}
.tutorial-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.tutorial-meta i {
  margin-right: 5px;
  color: var(--primary);
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
}
.faq-item:hover {
  border-color: #c7d2fe;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}
.faq-question i {
  color: var(--primary);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(45deg);
}
.faq-answer {
  display: none;
  padding-top: 14px;
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin-top: 14px;
}
.faq-item.active .faq-answer {
  display: block;
}

/* ===== CTA ===== */
.cta-section {
  padding: 90px 0;
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.92), rgba(79, 70, 229, 0.9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-inner {
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.btn-white {
  background: #fff;
  color: var(--primary);
}
.btn-white:hover {
  background: #eef2ff;
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.2);
}
.btn-outline-white {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}
.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.site-footer {
  background: #0b1120;
  color: #94a3b8;
  padding: 68px 0 24px;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand-logo {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .brand-logo span {
  color: #a5b4fc;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #64748b;
  max-width: 380px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: #94a3b8;
  transition: color .25s ease;
}
.footer-col ul a:hover {
  color: #a5b4fc;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: #64748b;
}
.footer-bottom a {
  color: #94a3b8;
}
.footer-bottom a:hover {
  color: #a5b4fc;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tutorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .split-grid {
    gap: 36px;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  :root {
    --header-h: 66px;
  }
  .section {
    padding: 64px 0;
  }
  .page-hero {
    padding: 64px 0 90px;
  }
  .nav-wrap {
    height: var(--header-h);
  }
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    border-radius: 0 0 20px 20px;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
    justify-content: center;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    padding: 20px;
  }
  .stat-num {
    font-size: 28px;
  }
  .steps-wrap {
    padding: 36px 28px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .split-grid {
    grid-template-columns: 1fr;
  }
  .split-media {
    order: 2;
  }
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-brand p {
    max-width: 100%;
  }
}

/* roulang page: article */
:root {
  --primary: #16234a;
  --primary-light: #22366b;
  --primary-dark: #0d152e;
  --accent: #e3b348;
  --accent-dark: #c8932b;
  --accent-light: #f0c96b;
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --text: #1a2235;
  --text-muted: #5a6680;
  --text-light: #8a94ab;
  --border: #dfe5f0;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --shadow: 0 8px 30px rgba(13, 21, 46, 0.08);
  --shadow-hover: 0 14px 40px rgba(13, 21, 46, 0.14);
  --container: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 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;
  text-rendering: optimizeLegibility;
}

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

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

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

input {
  font-family: inherit;
}

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

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(227, 179, 72, 0.12);
  color: #a87612;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== Header / Nav ===== */
.site-header {
  background: rgba(13, 21, 46, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 20px rgba(13, 21, 46, 0.3);
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-logo span {
  color: var(--accent);
  font-weight: 700;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 10px;
  color: var(--primary-dark);
  font-size: 16px;
  box-shadow: 0 4px 14px rgba(227, 179, 72, 0.35);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: var(--accent);
  font-weight: 700;
  background: rgba(227, 179, 72, 0.12);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(227, 179, 72, 0.3);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(227, 179, 72, 0.42);
  color: var(--primary-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}

.btn:focus-visible {
  outline: 3px solid rgba(227, 179, 72, 0.5);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(227, 179, 72, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(227, 179, 72, 0.42);
  color: var(--primary-dark);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #ffffff;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(227, 179, 72, 0.08);
}

.btn-ghost {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  background: rgba(227, 179, 72, 0.06);
}

.btn-dark {
  background: var(--primary-dark);
  color: #ffffff;
}

.btn-dark:hover {
  background: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(13, 21, 46, 0.25);
  color: #ffffff;
}

/* ===== Badge / Tags ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-accent {
  background: rgba(227, 179, 72, 0.18);
  color: #c8932b;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 100px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  background: rgba(227, 179, 72, 0.06);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb i {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.4);
}

.breadcrumb span {
  color: var(--accent);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  background-image: linear-gradient(135deg, rgba(13, 21, 46, 0.94), rgba(34, 54, 107, 0.86)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 72px 0 104px;
  color: #ffffff;
}

.article-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(227, 179, 72, 0.5), transparent);
}

.article-hero-title {
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 800;
  line-height: 1.35;
  max-width: 860px;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}

.hero-meta-item i {
  color: var(--accent);
}

/* ===== Article Content ===== */
.article-content-section {
  position: relative;
  margin-top: -48px;
  padding-bottom: 20px;
  z-index: 2;
}

.article-shell {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 52px 56px;
  border: 1px solid rgba(223, 229, 240, 0.6);
}

.article-body {
  font-size: 16.5px;
  line-height: 1.9;
  color: #2a3450;
}

.article-body > * + * {
  margin-top: 1.1em;
}

.article-body h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-top: 1.6em;
  padding-bottom: 0.35em;
  border-bottom: 2px solid var(--border);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 1.4em;
}

.article-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 1.3em;
}

.article-body p {
  margin-bottom: 1.2em;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  margin-bottom: 1.2em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body ul li::marker {
  color: var(--accent-dark);
}

.article-body blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(227, 179, 72, 0.07);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  color: var(--text-muted);
  font-style: italic;
}

.article-body a {
  color: #b57f16;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover {
  color: var(--accent-dark);
}

.article-body img {
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin: 1.5em 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: var(--bg);
  font-weight: 700;
  color: var(--primary-dark);
}

.article-body code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.9em;
  color: #c7254e;
}

.article-body pre {
  background: var(--primary-dark);
  color: #e8edf7;
  padding: 20px;
  border-radius: 12px;
  overflow-x: auto;
  line-height: 1.6;
  font-size: 14px;
  margin: 1.5em 0;
}

.article-body pre code {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}

/* ===== Article Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.article-tags-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-right: 4px;
  font-weight: 600;
}

/* ===== Article Footer Nav ===== */
.article-footer-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.article-footer-nav .btn {
  font-size: 14px;
  padding: 11px 20px;
}

/* ===== Empty State ===== */
.article-empty {
  text-align: center;
  padding: 60px 24px;
}

.article-empty .empty-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text-light);
  font-size: 30px;
}

.article-empty h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.article-empty p {
  color: var(--text-muted);
  margin-bottom: 10px;
}

.article-empty .btn {
  margin-top: 18px;
}

/* ===== Category Entry ===== */
.category-entry-section {
  padding: 80px 0;
  background: var(--bg);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 920px;
  margin: 0 auto;
}

.category-card {
  display: block;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(227, 179, 72, 0.45);
}

.category-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
}

.category-card-body {
  padding: 26px 28px 28px;
}

.category-card-body h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.category-card-body p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 14px;
  transition: var(--transition);
}

.btn-link i {
  transition: transform 0.3s ease;
}

.btn-link:hover {
  color: var(--accent-dark);
  gap: 12px;
}

.btn-link:hover i {
  transform: translateX(3px);
}

/* ===== Feature Strip ===== */
.feature-section {
  padding: 80px 0;
  background: #ffffff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.feature-item {
  text-align: center;
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid transparent;
  transition: var(--transition);
}

.feature-item:hover {
  border-color: rgba(227, 179, 72, 0.3);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  font-size: 22px;
  box-shadow: 0 6px 18px rgba(22, 35, 74, 0.2);
}

.feature-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.feature-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--bg);
}

.faq-grid {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  box-shadow: 0 2px 8px rgba(13, 21, 46, 0.04);
  transition: var(--transition);
  overflow: hidden;
}

.faq-item:hover {
  border-color: rgba(227, 179, 72, 0.4);
  box-shadow: var(--shadow);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  list-style: none;
  transition: var(--transition);
}

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

.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--accent-dark);
  transition: var(--transition);
  flex-shrink: 0;
}

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

.faq-item[open] summary {
  color: var(--accent-dark);
}

.faq-answer {
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 18px;
  margin-top: 0;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background-image: linear-gradient(135deg, rgba(13, 21, 46, 0.95), rgba(34, 54, 107, 0.88)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 88px 0;
  text-align: center;
  color: #ffffff;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(227, 179, 72, 0.6), transparent);
}

.cta-content {
  max-width: 640px;
  margin: 0 auto;
}

.cta-content .section-tag {
  background: rgba(227, 179, 72, 0.16);
  color: var(--accent);
}

.cta-content h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 14px;
  color: #ffffff;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  margin-bottom: 32px;
  line-height: 1.8;
}

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

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand-logo {
  font-size: 22px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 360px;
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

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

.footer-col a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

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

.footer-bottom a {
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ===== Back to Top ===== */
.to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 50;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--primary);
  color: var(--accent);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
}

.to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .article-shell {
    padding: 40px 36px;
  }

  .feature-grid {
    gap: 20px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 21, 46, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 40px rgba(13, 21, 46, 0.4);
    display: none;
  }

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

  .nav-link {
    padding: 13px 16px;
    border-radius: 10px;
    font-size: 16px;
    justify-content: flex-start;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .brand-logo {
    font-size: 18px;
  }

  .logo-mark {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  .article-hero {
    padding: 48px 0 88px;
  }

  .article-hero-title {
    font-size: clamp(1.4rem, 4vw, 1.9rem);
  }

  .article-shell {
    padding: 28px 24px;
    border-radius: 16px;
    margin-top: -36px;
  }

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

  .category-card img {
    height: 160px;
  }

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

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

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

  .cta-section {
    padding: 64px 0;
  }

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

  .footer-brand {
    grid-column: 1;
  }

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

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .brand-logo {
    font-size: 16px;
    gap: 8px;
  }

  .logo-mark {
    width: 30px;
    height: 30px;
    font-size: 12px;
    border-radius: 8px;
  }

  .article-hero {
    padding: 40px 0 76px;
  }

  .article-hero-meta {
    gap: 10px;
    flex-direction: column;
    align-items: flex-start;
  }

  .article-shell {
    padding: 24px 16px;
  }

  .article-body {
    font-size: 15.5px;
    line-height: 1.85;
  }

  .article-body h2 {
    font-size: 20px;
  }

  .article-body h3 {
    font-size: 18px;
  }

  .article-tags {
    gap: 8px;
  }

  .article-footer-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .article-footer-nav .btn {
    width: 100%;
    justify-content: center;
  }

  .category-card-body {
    padding: 20px;
  }

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

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

  .to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #1e5eff;
  --primary-dark: #1144b8;
  --primary-light: #e7eeff;
  --accent: #f5b942;
  --accent-dark: #d99a1f;
  --navy: #0b1730;
  --navy-2: #101f3e;
  --bg-body: #f2f5fa;
  --bg-soft: #e9eef7;
  --bg-deep: #0a1222;
  --text-title: #0b1730;
  --text-body: #3e4b61;
  --text-weak: #7f8ea6;
  --text-white: #f5f8ff;
  --border: #dfe6f0;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 10px rgba(8, 20, 50, .05);
  --shadow-md: 0 10px 30px rgba(8, 20, 50, .09);
  --shadow-lg: 0 24px 60px rgba(8, 20, 50, .14);
  --container: 1200px;
  --space: 90px;
  --space-sm: 56px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  border: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .25s ease, background .25s ease, box-shadow .25s ease, border-color .25s ease, transform .25s ease;
}

ul, ol {
  list-style: none;
}

input, button, textarea {
  font-family: inherit;
  font-size: 100%;
  border: 0;
  outline: none;
}

button {
  cursor: pointer;
  background: none;
}

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

/* ---------- Site Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--navy);
  white-space: nowrap;
}

.brand-logo span {
  color: var(--primary);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, #4f8bff 100%);
  color: #fff;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(30, 94, 255, .32);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-body);
  border-radius: 8px;
  transition: color .25s, background .25s;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--primary), #4b81ff);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 40px;
  box-shadow: 0 6px 16px rgba(30, 94, 255, .28);
  transition: transform .25s, box-shadow .25s;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(30, 94, 255, .36);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--primary-light);
  padding: 0 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Page Banner / Hero ---------- */
.page-banner {
  position: relative;
  padding: 120px 0 100px;
  color: #fff;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(8, 18, 38, .93) 0%, rgba(8, 18, 38, .72) 50%, rgba(8, 18, 38, .38) 100%);
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.banner-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 60px;
  align-items: center;
}

.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 40px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .25);
  color: #dcebff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 20px;
  backdrop-filter: blur(6px);
}

.banner-tag i {
  color: var(--accent);
}

.banner-title {
  font-size: clamp(34px, 4.6vw, 54px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: .5px;
  color: #fff;
  margin-bottom: 18px;
}

.banner-title em {
  font-style: normal;
  color: var(--accent);
}

.banner-sub {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(235, 243, 255, .88);
  max-width: 520px;
  margin-bottom: 34px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 700;
  transition: transform .25s, box-shadow .25s, background .25s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ffcd66);
  color: #12202f;
  box-shadow: 0 8px 24px rgba(245, 185, 66, .38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(245, 185, 66, .48);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, .4);
  color: #fff;
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, .16);
  border-color: rgba(255, 255, 255, .7);
  transform: translateY(-2px);
}

.banner-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.banner-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(232, 240, 255, .76);
}

.banner-meta i {
  color: var(--accent);
}

/* Passport Card Preview */
.passport-preview {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.passport-card {
  width: 100%;
  max-width: 440px;
  background: linear-gradient(145deg, #f8fbff, #eef3ff);
  border-radius: 22px;
  padding: 34px 32px;
  box-shadow: 0 30px 70px rgba(3, 12, 30, .45);
  border: 1px solid rgba(255, 255, 255, .7);
  position: relative;
  overflow: hidden;
  transform: rotate(2deg);
}

.passport-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(30, 94, 255, .16), transparent 70%);
}

.passport-card::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(245, 185, 66, .2), transparent 70%);
}

.passport-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  position: relative;
  z-index: 2;
}

.passport-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1e5eff, #5c94ff);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 6px 16px rgba(30, 94, 255, .3);
}

.passport-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 30px;
  background: linear-gradient(135deg, #f5b942, #ffcf72);
  color: #14212f;
  font-size: 12px;
  font-weight: 800;
}

.passport-user {
  font-size: 26px;
  font-weight: 900;
  color: var(--navy);
  margin-bottom: 4px;
  position: relative;
  z-index: 2;
}

.passport-id {
  font-size: 14px;
  color: var(--text-weak);
  letter-spacing: 1px;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}

.passport-card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 18px;
  border-top: 1px dashed rgba(11, 23, 48, .15);
  position: relative;
  z-index: 2;
}

.passport-card-bottom span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-body);
}

.passport-card-bottom i {
  color: #1e5eff;
}

/* ---------- Section base ---------- */
.section {
  padding: var(--space) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 30px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-title {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 900;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.85;
}

/* ---------- Feature Matrix ---------- */
.feature-matrix {
  background: #fff;
}

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

.feature-card {
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 84px;
  height: 84px;
  background: radial-gradient(circle, rgba(30, 94, 255, .08), transparent 70%);
  transition: transform .3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(30, 94, 255, .35);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #5b91ff);
  color: #fff;
  font-size: 20px;
  margin-bottom: 20px;
  box-shadow: 0 8px 18px rgba(30, 94, 255, .3);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-body);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}

.feature-link:hover {
  color: var(--primary-dark);
}

.feature-link i {
  transition: transform .25s;
}

.feature-link:hover i {
  transform: translateX(4px);
}

/* ---------- Stats ---------- */
.stats-section {
  background: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  padding: 76px 0;
}

.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(8, 18, 38, .86);
}

.stats-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.stat-item {
  text-align: center;
  padding: 22px 18px;
}

.stat-num {
  font-size: clamp(34px, 4vw, 50px);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-num small {
  font-size: 20px;
  color: var(--accent);
  font-weight: 800;
}

.stat-label {
  font-size: 14px;
  color: rgba(230, 239, 255, .75);
  letter-spacing: 1px;
}

/* ---------- Process ---------- */
.process-section {
  background: var(--bg-body);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.process-item {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 24px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s;
}

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

.process-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 16px;
  font-weight: 900;
  margin-bottom: 18px;
}

.process-item h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 10px;
}

.process-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
}

.process-arrow {
  position: absolute;
  top: 50%;
  right: -22px;
  z-index: 3;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transform: translateY(-50%);
}

/* ---------- Passport Types (Cards) ---------- */
.ctype-section {
  background: #fff;
}

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

.ctype-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex;
  flex-direction: column;
}

.ctype-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 94, 255, .3);
}

.ctype-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.ctype-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}

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

.ctype-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: rgba(11, 23, 48, .72);
  backdrop-filter: blur(6px);
}

.ctype-body {
  padding: 26px 24px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.ctype-body h3 {
  font-size: 20px;
  font-weight: 900;
  color: var(--text-title);
  margin-bottom: 6px;
}

.ctype-price {
  font-size: 14px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 14px;
}

.ctype-price strong {
  font-size: 28px;
  font-weight: 900;
}

.ctype-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 20px;
}

.ctype-list {
  margin-bottom: 24px;
  flex: 1;
}

.ctype-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 10px;
}

.ctype-list li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 4px;
}

.ctype-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: #fff;
  transition: background .25s, color .25s, transform .25s, box-shadow .25s;
}

.ctype-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 94, 255, .3);
}

.ctype-btn.is-primary {
  background: linear-gradient(135deg, var(--primary), #4f87ff);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(30, 94, 255, .3);
}

.ctype-btn.is-primary:hover {
  box-shadow: 0 12px 30px rgba(30, 94, 255, .4);
  transform: translateY(-2px);
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--bg-body);
}

.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}

.faq-item.open {
  border-color: rgba(30, 94, 255, .3);
  box-shadow: var(--shadow-sm);
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
  text-align: left;
  cursor: pointer;
  transition: color .25s;
}

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

.faq-q .faq-arrow {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  transition: transform .3s, background .3s;
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}

.faq-a {
  max-height: 0;
  padding: 0 26px;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}

.faq-item.open .faq-a {
  max-height: 320px;
  padding: 0 26px 22px;
}

.faq-a p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.85;
  padding-top: 4px;
  border-top: 1px dashed var(--border);
}

/* ---------- CTA ---------- */
.cta-section {
  background: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 90px 0;
  text-align: center;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 23, 48, .95), rgba(16, 32, 62, .82));
}

.cta-box {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

.cta-box .section-title {
  color: #fff;
}

.cta-box .section-sub {
  color: rgba(230, 239, 255, .8);
  margin-bottom: 32px;
}

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

.cta-phone {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 40px;
  border: 1px solid rgba(255, 255, 255, .35);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  transition: background .25s, transform .25s;
}

.cta-phone:hover {
  background: rgba(255, 255, 255, .1);
  transform: translateY(-2px);
}

.cta-phone i {
  color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: rgba(225, 234, 250, .78);
  padding: 64px 0 0;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr;
  gap: 44px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.footer-brand .brand-logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(225, 234, 250, .65);
  margin-top: 14px;
  max-width: 380px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 18px;
}

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

.footer-col ul a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(225, 234, 250, .72);
  transition: color .25s, transform .25s;
}

.footer-col ul a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 0;
  font-size: 13px;
  color: rgba(225, 234, 250, .5);
}

.footer-bottom a {
  color: rgba(225, 234, 250, .7);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  :root {
    --space: 72px;
  }

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

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

  .process-arrow {
    display: none;
  }

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

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

  .passport-preview {
    order: 2;
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 6px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    transition: transform .3s, opacity .3s, visibility .3s;
    z-index: 99;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 13px 16px;
    text-align: left;
    font-size: 16px;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .page-banner {
    padding: 84px 0 72px;
  }

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

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

  .feature-grid,
  .ctype-grid {
    grid-template-columns: 1fr;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .faq-q {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-a p {
    font-size: 14px;
  }
}

@media (max-width: 520px) {
  :root {
    --space: 56px;
    --space-sm: 40px;
  }

  .container {
    padding: 0 18px;
  }

  .banner-title {
    font-size: 30px;
  }

  .banner-sub {
    font-size: 15px;
  }

  .passport-card {
    padding: 24px 20px;
  }

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

  .ctype-body {
    padding: 20px 18px;
  }

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

  .section-title {
    font-size: 25px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}