/* roulang page: index */
:root {
  --bg-primary: #0B1220;
  --bg-secondary: #111C2E;
  --bg-card: rgba(255,255,255,0.04);
  --brand-blue: #2E6BFF;
  --brand-cyan: #00E0C6;
  --brand-gold: #F5A623;
  --text-primary: #E8EDF7;
  --text-secondary: #98A6B8;
  --text-muted: #5E6C82;
  --border-light: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 6px;
  --shadow-card: 0 12px 40px rgba(0,0,0,0.35);
  --shadow-hover: 0 20px 60px rgba(0,0,0,0.5), 0 0 30px rgba(46,107,255,0.15);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --transition-base: 0.3s ease;
  --container-max: 1200px;
  --spacing-section: 90px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-cyan); text-decoration: none; transition: color var(--transition-base); }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand-blue); outline-offset: 2px; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--spacing-section) 0; position: relative; }
.section-alt { background-color: var(--bg-secondary); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-head .overline { display: inline-block; font-size: 13px; letter-spacing: 0.12em; color: var(--brand-cyan); margin-bottom: 12px; font-weight: 600; }
.section-head h2 { font-size: 36px; font-weight: 700; line-height: 1.3; margin-bottom: 14px; color: var(--text-primary); }
.section-head h2::before { content: ""; display: block; width: 40px; height: 4px; margin: 0 auto 16px; background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); border-radius: 3px; }
.section-head p { color: var(--text-secondary); font-size: 16px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: var(--radius-md); padding: 14px 32px; font-size: 16px; font-weight: 600; line-height: 1.2; transition: all var(--transition-base); min-height: 44px; cursor: pointer; }
.btn:active { transform: scale(0.98); opacity: 0.85; }
.btn-primary { background: linear-gradient(135deg, #2E6BFF, #00B4D8); color: #fff; box-shadow: 0 0 24px rgba(46,107,255,0.45), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-primary:hover { filter: brightness(1.12); box-shadow: 0 0 36px rgba(46,107,255,0.6), inset 0 1px 0 rgba(255,255,255,0.2); transform: translateY(-2px); text-decoration: none; }
.btn-secondary { background: transparent; border: 1px solid rgba(255,255,255,0.25); color: var(--brand-cyan); }
.btn-secondary:hover { border-color: var(--brand-blue); background: rgba(46,107,255,0.08); text-decoration: none; transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 17px; }

/* Header / Nav */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: 72px; background: rgba(11,18,32,0.75); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-light); transition: all var(--transition-base); }
.site-header.scrolled { height: 60px; background: rgba(11,18,32,0.95); }
.header-inner { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.logo:hover { text-decoration: none; }
.logo-icon { width: 34px; height: 34px; position: relative; flex-shrink: 0; }
.logo-icon svg { width: 100%; height: 100%; }
.logo-text { letter-spacing: 0.02em; }
.logo-text .logo-sub { display: block; font-size: 11px; color: var(--text-muted); font-weight: 400; letter-spacing: 0.08em; margin-top: -2px; }
.main-nav { display: flex; align-items: center; gap: 6px; list-style: none; }
.main-nav a { display: block; padding: 10px 14px; font-size: 15px; color: var(--text-secondary); border-radius: 8px; position: relative; transition: color var(--transition-base); }
.main-nav a:hover { color: var(--brand-cyan); text-decoration: none; }
.main-nav a::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); transform: scaleX(0); transform-origin: left center; transition: transform 0.3s ease; }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }
.main-nav a.active { color: #fff; font-weight: 700; }
.nav-cta { margin-left: 8px; }
.nav-cta .btn { padding: 10px 22px; font-size: 14px; min-height: 40px; border-radius: 10px; }
.hamburger { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); margin: 3px 0; transition: all 0.3s ease; border-radius: 2px; }
.hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.mobile-menu { position: fixed; inset: 0; background: rgba(11,18,32,0.98); backdrop-filter: blur(24px); z-index: 99; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a { font-size: 22px; color: var(--text-primary); padding: 12px 24px; min-height: 44px; display: flex; align-items: center; }
.mobile-menu a.active { color: var(--brand-cyan); }
.mobile-menu .btn { margin-top: 16px; }

/* Hero */
.hero { min-height: 100vh; min-height: 640px; display: flex; align-items: center; position: relative; overflow: hidden; padding-top: 72px; }
.hero-bg { position: absolute; inset: 0; z-index: 0; background: linear-gradient(135deg, #0B1220 0%, #101D38 60%, #0B1220 100%); }
.hero-bg::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 60px 60px; transform: rotate(45deg) scale(1.4); }
.hero-glow-blue { position: absolute; width: 520px; height: 520px; border-radius: 50%; background: radial-gradient(circle, rgba(46,107,255,0.22) 0%, transparent 70%); top: -160px; right: -120px; filter: blur(20px); }
.hero-glow-cyan { position: absolute; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(0,224,198,0.16) 0%, transparent 70%); bottom: -100px; left: -100px; filter: blur(20px); }
.hero-bg-imgs { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.35; z-index: 0; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 0.8fr; gap: 60px; align-items: center; padding: 80px 0 100px; }
.hero-copy { max-width: 680px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(46,107,255,0.12); border: 1px solid rgba(46,107,255,0.3); border-radius: 100px; padding: 8px 18px; font-size: 13px; color: var(--brand-cyan); margin-bottom: 24px; font-weight: 600; }
.hero h1 { font-size: 52px; line-height: 1.2; font-weight: 800; margin-bottom: 20px; letter-spacing: -0.01em; }
.hero h1 .hl { background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); background-size: 100% 30%; background-repeat: no-repeat; background-position: 0 85%; padding: 0 4px; color: #fff; border-radius: 4px; }
.hero-sub { font-size: 18px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 36px; max-width: 540px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-trust { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted); }
.hero-trust .dot { color: var(--brand-cyan); margin: 0 4px; }
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.hero-phone { position: relative; width: 280px; height: 500px; border-radius: 36px; border: 2px solid rgba(255,255,255,0.14); background: linear-gradient(160deg, #111C2E, #0B1220); box-shadow: 0 30px 80px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(46,107,255,0.12); overflow: hidden; }
.hero-phone::before { content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 100px; height: 20px; background: #111C2E; border-radius: 0 0 14px 14px; z-index: 2; }
.hero-phone-screen { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; }
.hero-phone-screen .screen-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--brand-cyan); box-shadow: 0 0 20px var(--brand-cyan); animation: pulse 2s infinite; }
.hero-phone-screen .screen-bar { width: 160px; height: 10px; border-radius: 6px; background: rgba(255,255,255,0.08); }
.hero-phone-screen .screen-bar.long { width: 200px; }
.hero-phone-screen .screen-bar.highlight { background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); }
.hero-phone-glow { position: absolute; inset: 0; border-radius: 36px; box-shadow: 0 0 60px rgba(46,107,255,0.25); pointer-events: none; }
.hero-scroll { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); color: var(--text-muted); font-size: 12px; display: flex; flex-direction: column; align-items: center; gap: 6px; z-index: 2; letter-spacing: 0.12em; }
.hero-scroll .line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--brand-cyan), transparent); }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(0.8); } }

/* Flow Divider */
.flow-divider { height: 1px; background: linear-gradient(90deg, transparent, var(--brand-blue), var(--brand-cyan), transparent); border: none; margin: 0; position: relative; }
.flow-divider::after { content: ""; position: absolute; top: -4px; left: 50%; width: 80px; height: 9px; transform: translateX(-50%); background: radial-gradient(ellipse, rgba(0,224,198,0.4), transparent); filter: blur(4px); }

/* Feature Cards */
.feature-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
.feature-card { grid-column: span 5; background: linear-gradient(135deg, rgba(46,107,255,0.10), rgba(0,224,198,0.04)) , var(--bg-card); border: 1px solid var(--border-card); border-radius: var(--radius-lg); padding: 34px 30px; position: relative; backdrop-filter: blur(14px); transition: all var(--transition-base); overflow: hidden; }
.feature-card::after { content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease; }
.feature-card:hover { border-color: rgba(0,224,198,0.4); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-card:hover::after { transform: scaleX(1); }
.feature-card.wide { grid-column: span 7; }
.feature-card.lg { grid-column: span 6; }
.feature-card.sm { grid-column: span 4; }
.feature-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: rgba(46,107,255,0.14); border: 1px solid rgba(46,107,255,0.2); margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
.feature-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.6; }

/* Scenarios */
.scene-wrap { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 50px; align-items: start; }
.scene-nav { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 8px; }
.scene-nav a { display: flex; align-items: center; gap: 10px; padding: 16px 20px; border-radius: 12px; background: rgba(255,255,255,0.02); border: 1px solid transparent; color: var(--text-secondary); font-size: 15px; transition: all var(--transition-base); min-height: 54px; }
.scene-nav a:hover, .scene-nav a.active { background: rgba(46,107,255,0.08); border-color: rgba(46,107,255,0.3); color: var(--brand-cyan); text-decoration: none; }
.scene-nav .num { font-family: "SF Mono", monospace; font-size: 12px; color: var(--text-muted); }
.scene-panels { display: flex; flex-direction: column; gap: 30px; }
.scene-panel { background: linear-gradient(135deg, rgba(46,107,255,0.10), rgba(0,224,198,0.04)) , var(--bg-card); border: 1px solid var(--border-card); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-base); }
.scene-panel:hover { box-shadow: var(--shadow-hover); border-color: rgba(0,224,198,0.3); }
.scene-panel-img { height: 220px; overflow: hidden; position: relative; background-color: #141E2E; }
.scene-panel-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.scene-panel:hover .scene-panel-img img { transform: scale(1.04); }
.scene-panel-body { padding: 28px; }
.scene-panel-body h3 { font-size: 22px; margin-bottom: 12px; }
.scene-panel-body p { color: var(--text-secondary); margin-bottom: 16px; }
.scene-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* Cases */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { background: var(--bg-card); border: 1px solid var(--border-card); border-radius: var(--radius-lg); padding: 30px; position: relative; transition: all var(--transition-base); }
.case-card:hover { border-color: rgba(0,224,198,0.4); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.case-stats { font-size: 40px; font-weight: 800; font-feature-settings: "tnum"; color: var(--brand-gold); margin-bottom: 12px; line-height: 1.2; }
.case-quote { color: var(--text-primary); font-size: 15px; line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.case-author { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: 13px; }
.case-avatar { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan)); display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: 14px; }
.case-conclusion { text-align: center; font-size: 20px; font-weight: 700; color: var(--text-primary); padding: 40px 20px 0; line-height: 1.6; }
.case-conclusion span { color: var(--brand-cyan); }

/* Pricing */
.pricing-wrap { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; }
.pricing-card { flex: 1; max-width: 340px; background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 20px; padding: 36px 30px; position: relative; transition: all var(--transition-base); }
.pricing-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(0,224,198,0.3); }
.pricing-card.recommended { background: linear-gradient(135deg, rgba(46,107,255,0.16), rgba(0,224,198,0.06)) , var(--bg-card); border: 1px solid rgba(46,107,255,0.45); box-shadow: 0 0 40px rgba(46,107,255,0.2); padding: 44px 30px; margin: -10px 0; }
.pricing-card.recommended::before { content: "推荐方案"; position: absolute; top: 14px; right: 14px; background: var(--brand-gold); color: #0B1220; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 100px; }
.pricing-name { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.pricing-desc { color: var(--text-secondary); font-size: 13px; margin-bottom: 20px; }
.pricing-value { font-size: 40px; font-weight: 800; font-feature-settings: "tnum"; margin-bottom: 22px; }
.pricing-value small { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.pricing-feats { list-style: none; margin-bottom: 28px; display: grid; gap: 10px; }
.pricing-feats li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text-secondary); line-height: 1.5; }
.pricing-feats .check { color: var(--brand-cyan); font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.pricing-card .btn { width: 100%; }

/* News */
.news-list { display: grid; gap: 20px; grid-template-columns: 1fr; }
.news-item { display: grid; grid-template-columns: 140px 1fr auto; gap: 22px; align-items: center; background: var(--bg-card); border: 1px solid var(--border-card); border-radius: var(--radius-lg); padding: 20px 24px; transition: all var(--transition-base); }
.news-item:hover { border-color: rgba(0,224,198,0.4); box-shadow: 0 8px 30px rgba(0,0,0,0.35); transform: translateY(-2px); }
.news-thumb { width: 140px; height: 90px; border-radius: 12px; overflow: hidden; background-color: #141E2E; position: relative; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.news-item:hover .news-thumb img { transform: scale(1.06); }
.news-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; line-height: 1.5; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-body h3 a { color: var(--text-primary); }
.news-body h3 a:hover { color: var(--brand-cyan); text-decoration: none; }
.news-desc { color: var(--text-secondary); font-size: 14px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; gap: 10px; margin-top: 8px; font-size: 12px; color: var(--text-muted); }
.news-cat { display: inline-block; background: rgba(0,224,198,0.12); color: var(--brand-cyan); padding: 3px 12px; border-radius: 100px; font-size: 12px; }
.news-more { color: var(--brand-cyan); font-size: 14px; font-weight: 600; white-space: nowrap; }
.news-empty { border: 1px dashed rgba(255,255,255,0.18); border-radius: var(--radius-lg); padding: 60px 30px; text-align: center; color: var(--text-muted); }
.news-empty .empty-icon { font-size: 40px; margin-bottom: 12px; }
.news-empty p { font-size: 15px; margin-bottom: 6px; color: var(--text-secondary); }
.news-empty small { font-size: 13px; }

/* CTA */
.cta-banner { background: linear-gradient(135deg, #1a3a8a 0%, #0B1220 55%, #0B3B4A 100%); border-radius: 24px; position: relative; overflow: hidden; padding: 70px 50px; text-align: center; }
.cta-banner::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px); background-size: 50px 50px; transform: rotate(45deg) scale(1.5); }
.cta-banner::after { content: ""; position: absolute; width: 300px; height: 300px; border-radius: 50%; background: radial-gradient(circle, rgba(0,224,198,0.25), transparent 70%); bottom: -100px; right: -50px; }
.cta-banner-inner { position: relative; z-index: 2; }
.cta-banner h2 { font-size: 34px; margin-bottom: 16px; font-weight: 700; }
.cta-banner p { font-size: 16px; color: var(--text-secondary); margin-bottom: 30px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-banner .btn { font-size: 17px; padding: 16px 44px; }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border-card); border-radius: var(--radius-lg); overflow: hidden; transition: border-color var(--transition-base); }
.faq-item:hover { border-color: rgba(0,224,198,0.3); }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: 22px 26px; cursor: pointer; font-size: 16px; font-weight: 600; min-height: 44px; }
.faq-q .icon { width: 24px; height: 24px; position: relative; flex-shrink: 0; margin-left: 16px; }
.faq-q .icon::before, .faq-q .icon::after { content: ""; position: absolute; background: var(--brand-cyan); border-radius: 2px; transition: all 0.3s ease; }
.faq-q .icon::before { width: 14px; height: 2px; top: 11px; left: 5px; }
.faq-q .icon::after { width: 2px; height: 14px; top: 5px; left: 11px; }
.faq-item.open .faq-q .icon::after { transform: scaleY(0); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a-inner { padding: 0 26px 22px; color: var(--text-secondary); font-size: 15px; line-height: 1.7; }

/* Footer */
.site-footer { background-color: #070D18; border-top: 1px solid var(--border-light); position: relative; }
.site-footer::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan), transparent); }
.footer-top { display: flex; gap: 40px; padding: 60px 0 40px; }
.footer-col { flex: 1; }
.footer-col.brand-col { flex: 1.6; }
.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 30px; height: 3px; background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan)); border-radius: 3px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.footer-desc { color: var(--text-muted); font-size: 14px; line-height: 1.65; margin-top: 14px; padding-right: 30px; }
.footer-links { list-style: none; display: grid; gap: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 14px; transition: all var(--transition-base); }
.footer-links a:hover { color: var(--brand-cyan); padding-left: 4px; }
.footer-contact { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.footer-bottom { border-top: 1px solid var(--border-light); padding: 20px 0; }
.footer-bottom-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-copy { color: var(--text-muted); font-size: 13px; }
.footer-legal { color: var(--text-muted); font-size: 12px; }

/* Responsive */
@media (max-width: 1199px) {
  .hero h1 { font-size: 42px; }
  .hero-inner { gap: 40px; }
  .feature-card, .feature-card.wide, .feature-card.lg, .feature-card.sm { grid-column: span 6; }
  .section-head h2 { font-size: 32px; }
}
@media (max-width: 991px) {
  .main-nav, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; padding-top: 60px; }
  .hero-visual { display: none; }
  .scene-wrap { grid-template-columns: 1fr; }
  .scene-nav { position: static; flex-direction: row; flex-wrap: wrap; }
  .scene-nav a { flex: 1; min-width: 160px; }
  .case-grid { grid-template-columns: 1fr; }
  .pricing-wrap { flex-direction: column; }
  .pricing-card { max-width: 100%; width: 100%; }
  .pricing-card.recommended { margin: 16px 0; }
  .news-item { grid-template-columns: 100px 1fr; }
  .news-thumb { width: 100px; height: 76px; }
  .news-more { display: none; }
  .footer-top { flex-wrap: wrap; }
  .footer-col, .footer-col.brand-col { flex: 1 1 45%; }
}
@media (max-width: 767px) {
  :root { --spacing-section: 60px; }
  .section-head h2 { font-size: 28px; }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card, .feature-card.wide, .feature-card.lg, .feature-card.sm { grid-column: span 1; }
  .scene-nav { flex-direction: column; }
  .scene-nav a { width: 100%; }
  .pricing-card { padding: 30px 22px; }
  .case-stats { font-size: 34px; }
  .cta-banner { padding: 50px 24px; }
  .cta-banner h2 { font-size: 28px; }
  .news-item { grid-template-columns: 1fr; gap: 12px; }
  .news-thumb { width: 100%; height: 160px; }
  .news-body h3 { white-space: normal; -webkit-line-clamp: 2; display: -webkit-box; -webkit-box-orient: vertical; }
  .footer-top { flex-direction: column; gap: 30px; }
  .footer-col, .footer-col.brand-col { flex: 1 1 100%; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* roulang page: category1 */
:root {
  --bg: #0B1220;
  --bg-secondary: #111C2E;
  --primary: #2E6BFF;
  --primary-deep: #00B4D8;
  --accent: #00E0C6;
  --gold: #F5A623;
  --text-main: #E8EDF7;
  --text-secondary: #98A6B8;
  --text-muted: #5E6C82;
  --border: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 4px 20px rgba(0,0,0,0.25);
  --shadow-md: 0 12px 40px rgba(0,0,0,0.35);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --glow-primary: 0 0 24px rgba(46,107,255,0.45), inset 0 1px 0 rgba(255,255,255,0.2);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

a:hover {
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button {
  font-family: var(--font-family);
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head .head-line {
  display: inline-block;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 36px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head p {
  color: var(--text-secondary);
  max-width: 640px;
  margin: 16px auto 0;
  font-size: 16px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: 72px;
  background: rgba(11, 18, 32, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: height 0.3s ease, background 0.3s ease;
}

.site-header.scrolled {
  height: 62px;
  background: rgba(11, 18, 32, 0.95);
}

.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: height 0.3s ease;
}

.site-header.scrolled .header-inner {
  height: 62px;
}

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

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(46,107,255,0.12);
  border: 1px solid rgba(46,107,255,0.25);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

.main-nav > li > a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  border-radius: 8px;
  position: relative;
  white-space: nowrap;
  transition: var(--transition);
}

.main-nav > li > a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
}

.main-nav > li > a:hover,
.main-nav > li > a.active {
  color: var(--text-main);
  font-weight: 600;
}

.main-nav > li > a:hover::after,
.main-nav > li > a.active::after {
  width: 24px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: var(--glow-primary);
  transition: var(--transition);
  border: none;
}

.nav-cta:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 0 30px rgba(46,107,255,0.55);
}

.nav-cta:active {
  transform: translateY(0);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 8px;
  z-index: 1101;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
  margin: 0 auto;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(11, 18, 32, 0.97);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer .main-nav {
  flex-direction: column;
  gap: 8px;
}

.mobile-drawer .main-nav > li > a {
  font-size: 22px;
  padding: 12px 32px;
  color: var(--text-main);
}

.mobile-drawer .nav-cta {
  margin-top: 16px;
  font-size: 16px;
  padding: 12px 32px;
}

/* ========== Page Hero (小尺寸) ========== */
.page-hero {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: center;
  padding: 140px 0 70px;
  background:
    linear-gradient(135deg, rgba(11,18,32,0.88) 0%, rgba(17,28,46,0.70) 50%, rgba(46,107,255,0.30) 100%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat,
    var(--bg);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,224,198,0.25), transparent 70%);
  pointer-events: none;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -140px;
  left: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,107,255,0.3), transparent 70%);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0,224,198,0.12);
  border: 1px solid rgba(0,224,198,0.3);
  border-radius: 24px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.page-hero h1 {
  font-size: 52px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.page-hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero .hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 32px;
}

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

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--glow-primary);
  transition: var(--transition);
  cursor: pointer;
  min-height: 48px;
}

.btn-primary:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(46,107,255,0.55);
  text-decoration: none;
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 14px rgba(46,107,255,0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  background: transparent;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  min-height: 48px;
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(46,107,255,0.08);
  text-decoration: none;
  color: var(--text-main);
}

.btn-secondary:active {
  opacity: 0.85;
}

/* ========== Intro Section ========== */
.intro-section {
  padding: 80px 0 40px;
  background: var(--bg);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.intro-copy h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 20px;
}

.intro-copy .head-line {
  display: inline-block;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin-bottom: 18px;
}

.intro-copy p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.intro-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item {
  text-align: center;
}

.stat-item .num {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  font-feature-settings: "tnum";
  line-height: 1.2;
}

.stat-item .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ========== Cards Grid ========== */
.cards-section {
  padding: 70px 0 90px;
  background: var(--bg);
  position: relative;
}

.cards-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46,107,255,0.5), rgba(0,224,198,0.5), transparent);
}

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

.news-card {
  position: relative;
  background: linear-gradient(135deg, rgba(46,107,255,0.10), rgba(0,224,198,0.04)), rgba(255,255,255,0.04);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.news-card:hover {
  border-color: rgba(0,224,198,0.4);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(46,107,255,0.15);
  transform: translateY(-6px);
}

.news-card:hover::after {
  transform: scaleX(1);
}

.card-media {
  position: relative;
  height: 190px;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

.news-card:hover .card-media img {
  transform: scale(1.04);
}

.card-media .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(0,224,198,0.12);
  border: 1px solid rgba(0,224,198,0.35);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  border-radius: 24px;
  backdrop-filter: blur(8px);
}

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

.card-body h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

.news-card:hover .card-body h3 {
  color: var(--accent);
}

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

.card-link {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}

.card-link:hover {
  color: var(--accent);
  gap: 10px;
  text-decoration: none;
}

.card-link .arrow {
  transition: transform 0.3s ease;
}

.card-link:hover .arrow {
  transform: translateX(4px);
}

/* ========== Flow Section ========== */
.flow-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.flow-step {
  position: relative;
  padding: 32px 24px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.flow-step:hover {
  border-color: rgba(46,107,255,0.4);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.step-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.step-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(46,107,255,0.12);
  border-radius: 12px;
  margin-bottom: 16px;
}

.step-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  stroke-width: 1.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.flow-step h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 90px 0;
  background: var(--bg);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: linear-gradient(135deg, rgba(46,107,255,0.06), transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.active {
  border-color: rgba(46,107,255,0.4);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.3s ease;
  min-height: 56px;
}

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

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.faq-icon::before {
  width: 14px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
}

.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease, opacity 0.3s ease;
  opacity: 0;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  opacity: 1;
  padding: 0 24px 22px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  border-left: 2px solid rgba(46,107,255,0.5);
  padding-left: 16px;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background:
    linear-gradient(135deg, rgba(46,107,255,0.85), rgba(0,180,216,0.75)),
    radial-gradient(circle at 20% 50%, rgba(0,224,198,0.4), transparent 60%),
    var(--bg);
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

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

.cta-inner h2 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.cta-inner p {
  color: rgba(255,255,255,0.85);
  font-size: 16px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.cta-inner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
  font-size: 16px;
  padding: 16px 36px;
}

.cta-inner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
  filter: none;
}

/* ========== Footer ========== */
.site-footer {
  background: #070D18;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.site-footer .container {
  padding-top: 64px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(46,107,255,0.12);
  border: 1px solid rgba(46,107,255,0.25);
  flex-shrink: 0;
}

.footer-brand span {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
  text-decoration: none;
}

.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal {
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== Responsive ========== */
@media (max-width: 1199px) {
  .container {
    padding: 0 20px;
  }

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

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

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

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-drawer .main-nav {
    display: flex;
  }

  .page-hero h1 {
    font-size: 40px;
  }

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

  .intro-stats {
    margin-top: 24px;
  }

  .section-head h2 {
    font-size: 30px;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

  .page-hero {
    min-height: 300px;
    padding: 120px 0 50px;
  }

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

  .page-hero .hero-sub {
    font-size: 16px;
  }

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

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    justify-content: center;
    width: 100%;
  }

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

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 32px;
  }

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

  .cta-section {
    padding: 70px 0;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

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

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

  .page-hero h1 {
    font-size: 28px;
  }

  .page-hero .hero-sub {
    font-size: 15px;
  }

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

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

/* roulang page: article */
:root {
  --bg-primary: #0B1220;
  --bg-secondary: #111C2E;
  --bg-card: rgba(255,255,255,0.04);
  --brand-blue: #2E6BFF;
  --brand-cyan: #00E0C6;
  --brand-gold: #F5A623;
  --text-main: #E8EDF7;
  --text-sub: #98A6B8;
  --text-dim: #5E6C82;
  --border-light: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-small: 6px;
  --shadow-card: 0 12px 40px rgba(0,0,0,0.35);
  --shadow-hover: 0 20px 60px rgba(0,0,0,0.5), 0 0 30px rgba(46,107,255,0.15);
  --glow-blue: 0 0 24px rgba(46,107,255,0.45), inset 0 1px 0 rgba(255,255,255,0.2);
  --container-w: 1200px;
  --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-blue); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: var(--brand-cyan); }
a:focus-visible { outline: 2px solid var(--brand-blue); outline-offset: 2px; }
button { font-family: var(--font-stack); cursor: pointer; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; position: relative; }
.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* Header 导航 */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(11,18,32,0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: height 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  height: 60px;
  background: rgba(11,18,32,0.95);
}
.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.logo:hover { color: var(--text-main); }
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(46,107,255,0.2), rgba(0,224,198,0.1));
  border: 1px solid rgba(46,107,255,0.3);
  flex-shrink: 0;
}
.logo-text { background: linear-gradient(135deg, #fff, #B8D0FF); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.main-nav { display: flex; align-items: center; gap: 4px; list-style: none; }
.main-nav li a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--text-sub);
  border-radius: 8px;
  position: relative;
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
}
.main-nav li a::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.main-nav li a:hover { color: var(--brand-blue); }
.main-nav li a:hover::after { transform: scaleX(1); }
.main-nav li a.active { color: #fff; font-weight: 600; }
.main-nav li a.active::after { transform: scaleX(1); }
.nav-cta {
  margin-left: 12px;
  padding: 9px 22px !important;
  background: linear-gradient(135deg, var(--brand-blue), #00B4D8);
  border-radius: var(--radius-btn) !important;
  color: #fff !important;
  font-weight: 600;
  box-shadow: var(--glow-blue);
  transition: filter 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(46,107,255,0.6), inset 0 1px 0 rgba(255,255,255,0.25);
  color: #fff !important;
}
.nav-cta:active { transform: translateY(0); box-shadow: 0 0 16px rgba(46,107,255,0.35); }
.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: background 0.25s ease;
}
.menu-toggle:hover { background: rgba(255,255,255,0.06); }
.menu-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-drawer {
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(11,18,32,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  padding: 24px;
  z-index: 999;
  transform: translateY(-120%);
  transition: transform 0.35s ease;
}
.mobile-drawer.open { transform: translateY(0); }
.mobile-drawer ul { list-style: none; }
.mobile-drawer li a {
  display: block;
  padding: 14px 12px;
  font-size: 18px;
  color: var(--text-main);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  border-radius: 8px;
}
.mobile-drawer li a:hover { background: rgba(46,107,255,0.1); color: var(--brand-cyan); }
.mobile-drawer li a.active { color: var(--brand-cyan); font-weight: 600; }
.mobile-drawer .nav-cta { margin-top: 16px; text-align: center; border-radius: var(--radius-btn) !important; color: #fff !important; background: linear-gradient(135deg, var(--brand-blue), #00B4D8); }

/* 文章页横幅 */
.article-banner {
  padding-top: 152px;
  padding-bottom: 56px;
  background: linear-gradient(135deg, rgba(11,18,32,0.95), rgba(17,28,46,0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}
.article-banner::before {
  content: "";
  position: absolute;
  top: 80px; right: -60px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,107,255,0.16), transparent 70%);
  pointer-events: none;
}
.article-banner::after {
  content: "";
  position: absolute;
  bottom: -80px; left: -60px;
  width: 260px; height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,224,198,0.1), transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--brand-cyan); }
.breadcrumb-sep { color: var(--text-dim); }
.breadcrumb-current { color: var(--text-sub); max-width: 420px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.breadcrumb-cat { color: var(--brand-cyan); }

.article-header {
  max-width: 860px;
  position: relative;
  z-index: 2;
}
.article-header h1 {
  font-size: 52px;
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-dim);
}
.meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 24px;
  background: rgba(0,224,198,0.12);
  color: var(--brand-cyan);
  font-weight: 500;
  font-size: 12px;
}
.meta-badge-blue {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 24px;
  background: rgba(46,107,255,0.15);
  color: var(--brand-blue);
  font-weight: 500;
  font-size: 12px;
}
.article-meta .meta-sep { width: 3px; height: 3px; border-radius: 50%; background: var(--text-dim); }
.meta-date, .meta-views { display: inline-flex; align-items: center; gap: 4px; }
.meta-views span { font-feature-settings: "tnum"; }

/* 正文区 */
.article-main {
  padding: 72px 0 40px;
  background: var(--bg-primary);
  position: relative;
}
.article-main::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46,107,255,0.4), rgba(0,224,198,0.4), transparent);
}
.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
  font-size: 17px;
  line-height: 1.85;
  color: #D5DFEF;
}
.article-body p { margin-bottom: 24px; }
.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin: 48px 0 20px;
  line-height: 1.35;
  position: relative;
  padding-left: 18px;
}
.article-body h2::before {
  content: "";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--brand-blue), var(--brand-cyan));
}
.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-main);
  margin: 36px 0 16px;
}
.article-body img {
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  margin: 32px 0;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.article-body blockquote {
  border-left: 4px solid var(--brand-blue);
  background: rgba(46,107,255,0.08);
  padding: 20px 24px;
  margin: 32px 0;
  border-radius: 0 12px 12px 0;
  color: var(--text-sub);
  font-style: normal;
}
.article-body ul, .article-body ol { margin: 20px 0 28px; padding-left: 26px; }
.article-body li { margin-bottom: 10px; }
.article-body a { color: var(--brand-cyan); border-bottom: 1px solid rgba(0,224,198,0.3); }
.article-body a:hover { border-bottom-color: var(--brand-cyan); }
.article-body strong { color: #fff; font-weight: 600; }
.article-body table { width: 100%; border-collapse: collapse; margin: 28px 0; font-size: 15px; }
.article-body table th, .article-body table td { border: 1px solid var(--border-light); padding: 12px 16px; text-align: left; }
.article-body table th { background: rgba(46,107,255,0.1); color: var(--text-main); font-weight: 600; }
.article-body code { background: rgba(46,107,255,0.12); padding: 2px 8px; border-radius: 6px; font-size: 14px; color: var(--brand-cyan); }
.article-body .note {
  border-left: 4px solid var(--brand-gold);
  background: rgba(245,166,35,0.08);
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--text-sub);
  font-size: 15px;
}

/* 内容未找到 */
.not-found {
  max-width: 760px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-card);
  background: rgba(17,28,46,0.4);
}
.not-found-icon { font-size: 52px; margin-bottom: 16px; opacity: 0.6; }
.not-found h2 { font-size: 26px; color: var(--text-main); margin-bottom: 12px; }
.not-found p { color: var(--text-dim); margin-bottom: 24px; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--brand-blue), #00B4D8);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: none;
  box-shadow: var(--glow-blue);
  transition: filter 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  text-decoration: none;
}
.btn-primary:hover { filter: brightness(1.12); transform: translateY(-2px); box-shadow: 0 0 32px rgba(46,107,255,0.6); color: #fff; }
.btn-primary:active { transform: translateY(0); box-shadow: 0 0 16px rgba(46,107,255,0.35); }
.btn-primary:focus-visible { outline: 4px solid rgba(46,107,255,0.4); outline-offset: 2px; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: transparent;
  color: var(--brand-blue);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255,255,255,0.25);
  text-decoration: none;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.btn-secondary:hover { border-color: var(--brand-blue); background: rgba(46,107,255,0.08); color: var(--brand-cyan); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }

/* 相关推荐 */
.related-section {
  padding: 80px 0 60px;
  background: var(--bg-primary);
  position: relative;
}
.related-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}
.related-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}
.related-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  position: relative;
  padding-top: 14px;
}
.related-header h2::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 40px; height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: linear-gradient(135deg, rgba(46,107,255,0.10), rgba(0,224,198,0.04)) , rgba(255,255,255,0.04);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  text-decoration: none;
  color: var(--text-main);
  position: relative;
}
.related-card::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
  transition: width 0.4s ease;
}
.related-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,224,198,0.4);
  box-shadow: var(--shadow-hover);
  color: var(--text-main);
}
.related-card:hover::after { width: 100%; }
.related-card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #141E2E;
}
.related-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .related-card-img img { transform: scale(1.04); }
.related-card-body { padding: 22px; }
.related-card-date {
  font-size: 12px;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 8px;
}
.related-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-tag {
  display: inline-flex;
  padding: 3px 12px;
  border-radius: 24px;
  background: rgba(0,224,198,0.12);
  color: var(--brand-cyan);
  font-size: 12px;
  font-weight: 500;
}
.related-more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--brand-cyan);
  font-size: 15px;
  font-weight: 500;
  transition: gap 0.25s ease;
}
.related-more-link:hover { gap: 12px; color: var(--brand-blue); }

/* 返回入口 */
.article-return {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 24px 80px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* CTA 区块 */
.cta-section {
  padding: 90px 0;
  position: relative;
  background:
    linear-gradient(rgba(46,107,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,107,255,0.08) 1px, transparent 1px),
    linear-gradient(135deg, #0B1220, #111C2E);
  background-size: 44px 44px, 44px 44px, 100% 100%;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse, rgba(46,107,255,0.15), transparent 70%);
  pointer-events: none;
}
.cta-inner { text-align: center; position: relative; z-index: 2; }
.cta-inner h2 {
  font-size: 38px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-inner p {
  font-size: 17px;
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto 36px;
}
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 页脚 */
.site-footer {
  background: #070D18;
  border-top: 1px solid rgba(46,107,255,0.25);
  padding-top: 64px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-brand .logo-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, rgba(46,107,255,0.2), rgba(0,224,198,0.1));
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.footer-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 24px; height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-sub);
  font-size: 14px;
  transition: color 0.25s ease, padding-left 0.25s ease;
}
.footer-links a:hover { color: var(--brand-cyan); padding-left: 6px; }
.footer-contact p { color: var(--text-sub); font-size: 14px; margin-bottom: 8px; }
.footer-bottom { padding: 24px 0; }
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copy { color: var(--text-dim); font-size: 13px; }
.footer-legal { color: var(--text-dim); font-size: 12px; }

/* 响应式 */
@media (max-width: 1024px) {
  .article-header h1 { font-size: 44px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .site-header { height: 64px; }
  .mobile-drawer { top: 64px; }
  .article-banner { padding-top: 120px; padding-bottom: 40px; }
  .article-header h1 { font-size: 36px; }
  .article-meta { gap: 8px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-header h2 { font-size: 28px; }
  .cta-inner h2 { font-size: 30px; }
  .article-return { flex-direction: column; }
  .article-return .btn-primary, .article-return .btn-secondary { width: 100%; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .container-narrow { padding: 0 18px; }
  .article-header h1 { font-size: 30px; line-height: 1.3; }
  .article-body { font-size: 15px; line-height: 1.8; padding: 0 18px; }
  .article-body h2 { font-size: 23px; }
  .article-body h3 { font-size: 19px; }
  .article-banner { padding-top: 108px; }
  .breadcrumb { font-size: 13px; }
  .breadcrumb-current { max-width: 160px; }
  .related-card-body { padding: 18px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .cta-buttons .btn-primary, .cta-buttons .btn-secondary { width: 100%; }
  .article-main { padding-top: 48px; }
  .related-section { padding: 56px 0 40px; }
  .article-return { padding-bottom: 56px; }
}
@media (max-width: 360px) {
  .logo { font-size: 17px; }
  .article-header h1 { font-size: 26px; }
}

/* 动画 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.article-header, .article-body, .related-grid, .cta-inner {
  animation: fadeInUp 0.6s ease both;
}
.article-body { animation-delay: 0.1s; }
.related-grid { animation-delay: 0.2s; }
.cta-inner { animation-delay: 0.3s; }

/* 触屏压感 */
@media (hover: none) {
  a:active, button:active, .related-card:active, .btn-primary:active, .btn-secondary:active {
    opacity: 0.85;
    transform: scale(0.98);
  }
}

/* roulang page: category2 */
:root{
  --bg-primary:#0B1220;
  --bg-secondary:#111C2E;
  --brand:#2E6BFF;
  --accent:#00E0C6;
  --amber:#F5A623;
  --text-primary:#E8EDF7;
  --text-secondary:#98A6B8;
  --text-muted:#5E6C82;
  --border:rgba(255,255,255,0.08);
  --border-card:rgba(255,255,255,0.10);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:6px;
  --shadow-card:0 12px 40px rgba(0,0,0,0.35);
  --shadow-hover:0 20px 60px rgba(0,0,0,0.5), 0 0 30px rgba(46,107,255,0.15);
  --container:1200px;
  --font-stack:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-stack);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{text-decoration:underline;}
button{font-family:var(--font-stack);cursor:pointer;border:0;background:none;}
ul,ol{list-style:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);border:0;}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 28px;border-radius:var(--radius-md);
  transition:all .25s ease;text-decoration:none;cursor:pointer;
  border:1px solid transparent;gap:8px;
}
.btn-primary{
  background:linear-gradient(135deg,#2E6BFF,#00B4D8);
  color:#fff;
  box-shadow:0 0 24px rgba(46,107,255,0.45),inset 0 1px 0 rgba(255,255,255,0.2);
}
.btn-primary:hover{
  filter:brightness(1.12);
  box-shadow:0 0 36px rgba(46,107,255,0.6),inset 0 1px 0 rgba(255,255,255,0.25);
  transform:translateY(-2px);
  color:#fff;text-decoration:none;
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(46,107,255,0.35);}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,0.25);
  color:var(--text-primary);
}
.btn-ghost:hover{
  border-color:var(--brand);
  background:rgba(46,107,255,0.08);
  color:var(--text-primary);text-decoration:none;
}
.btn-ghost:active{opacity:.85;}
.btn:focus-visible,a:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:3px;
  box-shadow:0 0 0 4px rgba(46,107,255,0.4);
}

/* ===== Header / Nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(11,18,32,0.75);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  height:72px;transition:height .3s ease,background .3s ease;
}
.site-header.scrolled{
  height:60px;
  background:rgba(11,18,32,0.95);
}
.header-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  height:100%;
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  text-decoration:none;flex-shrink:0;
}
.brand:hover{text-decoration:none;}
.brand-text{
  font-size:20px;font-weight:800;letter-spacing:.02em;
  color:var(--text-primary);white-space:nowrap;
}
.main-nav{display:flex;align-items:center;gap:2px;}
.main-nav a{
  display:inline-block;
  padding:10px 14px;
  font-size:15px;letter-spacing:.02em;
  color:var(--text-secondary);
  text-decoration:none;
  border-radius:8px;
  position:relative;
  transition:color .2s ease;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;
  height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.main-nav a:hover{color:var(--text-primary);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{
  color:var(--text-primary);font-weight:700;
}
.main-nav a.active::after{transform:scaleX(1);}
.nav-cta{margin-left:12px;flex-shrink:0;}
.nav-cta .btn{padding:10px 22px;font-size:14px;}
.hamburger{
  display:none;
  width:44px;height:44px;
  border-radius:8px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border);
}
.hamburger span{
  display:block;width:20px;height:2px;
  background:var(--text-primary);
  border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  display:none;
  position:fixed;top:72px;left:0;right:0;bottom:0;z-index:99;
  background:rgba(11,18,32,0.97);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  padding:32px 24px;
  overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .main-nav{
  flex-direction:column;align-items:stretch;gap:4px;
}
.mobile-drawer .main-nav a{
  display:block;padding:16px 8px;
  font-size:20px;color:var(--text-primary);
  border-bottom:1px solid var(--border);
}
.mobile-drawer .main-nav a::after{display:none;}
.mobile-drawer .main-nav a.active{
  color:var(--accent);
  padding-left:16px;
  border-left:3px solid var(--accent);
}
.mobile-drawer .nav-cta{margin:24px 0 0;display:block;}
.mobile-drawer .nav-cta .btn{width:100%;padding:16px;font-size:16px;}

/* ===== Category Hero ===== */
.cat-hero{
  position:relative;
  min-height:420px;
  display:flex;align-items:center;
  padding:120px 0 64px;
  overflow:hidden;
  background:var(--bg-primary);
}
.cat-hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(135deg,rgba(46,107,255,0.18),rgba(0,224,198,0.06)),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.cat-hero-grid-overlay{
  position:absolute;inset:0;z-index:1;
  background-image:
    repeating-linear-gradient(45deg,rgba(255,255,255,0.03) 0,rgba(255,255,255,0.03) 1px,transparent 1px,transparent 14px);
}
.cat-hero-glow{
  position:absolute;z-index:1;border-radius:50%;filter:blur(60px);
}
.cat-hero-glow.g-blue{width:360px;height:360px;background:rgba(46,107,255,0.25);top:-120px;right:10%;}
.cat-hero-glow.g-cyan{width:300px;height:300px;background:rgba(0,224,198,0.12);bottom:-80px;left:5%;}
.cat-hero-content{
  position:relative;z-index:2;
  max-width:760px;
}
.cat-hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;
  border-radius:24px;
  background:rgba(0,224,198,0.12);
  color:var(--accent);
  font-size:13px;font-weight:600;
  border:1px solid rgba(0,224,198,0.2);
  margin-bottom:20px;
}
.cat-hero h1{
  font-size:46px;line-height:1.2;font-weight:800;
  color:var(--text-primary);
  margin-bottom:16px;
  letter-spacing:.01em;
}
.cat-hero .gradient-underline{
  background:linear-gradient(90deg,var(--brand),var(--accent));
  height:4px;width:64px;border-radius:4px;
  margin-bottom:20px;
}
.cat-hero p{
  font-size:17px;line-height:1.8;
  color:var(--text-secondary);
  max-width:660px;
  margin-bottom:32px;
}
.cat-hero .hero-actions{
  display:flex;gap:16px;flex-wrap:wrap;
}
.cat-hero .hero-trust{
  display:flex;align-items:center;gap:10px;
  margin-top:24px;
  font-size:13px;color:var(--text-muted);
}
.cat-hero .hero-trust .dot{
  width:4px;height:4px;border-radius:50%;
  background:var(--accent);
}

/* ===== Section base ===== */
.section{padding:80px 0;}
.section-alt{background:var(--bg-secondary);}
.section-head{
  margin-bottom:48px;
  max-width:680px;
}
.section-tagline{
  display:inline-block;
  font-size:13px;font-weight:700;
  letter-spacing:.08em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head h2{
  font-size:34px;line-height:1.3;font-weight:800;
  color:var(--text-primary);
  margin-bottom:14px;
}
.section-head h2 .highlight{
  color:var(--brand);
}
.section-head p{
  font-size:16px;line-height:1.8;
  color:var(--text-secondary);
}
.section-divider{
  height:1px;
  background:linear-gradient(90deg,transparent,var(--brand),var(--accent),transparent);
  border:0;
  opacity:.4;
}

/* ===== Category Intro ===== */
.cat-intro{
  padding:48px 0 0;
}
.cat-intro-card{
  background:linear-gradient(135deg,rgba(46,107,255,0.08),rgba(0,224,198,0.03));
  border:1px solid var(--border-card);
  border-radius:20px;
  padding:40px 44px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.cat-intro-card h2{
  font-size:24px;font-weight:700;
  margin-bottom:16px;
  color:var(--text-primary);
}
.cat-intro-card p{
  font-size:16px;line-height:1.9;
  color:var(--text-secondary);
  margin-bottom:16px;
}
.cat-intro-card p:last-child{margin-bottom:0;}
.cat-intro-card .intro-meta{
  display:flex;gap:24px;flex-wrap:wrap;
  margin-top:20px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,0.06);
}
.cat-intro-card .intro-meta span{
  font-size:14px;color:var(--text-secondary);
  display:inline-flex;align-items:center;gap:8px;
}
.cat-intro-card .intro-meta i{
  color:var(--accent);
  font-style:normal;
}

/* ===== Waterfall Cards (场景卡片) ===== */
.scene-section{padding:72px 0 80px;}
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  align-items:start;
}
.scene-card{
  background:linear-gradient(135deg,rgba(46,107,255,0.10),rgba(0,224,198,0.04)),rgba(255,255,255,0.04);
  border:1px solid var(--border-card);
  border-radius:var(--radius-lg);
  overflow:hidden;
  position:relative;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  display:flex;flex-direction:column;
}
.scene-card::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transform:scaleX(0);transform-origin:left;
  transition:transform .3s ease;
}
.scene-card:hover{
  transform:translateY(-6px);
  border-color:rgba(0,224,198,0.4);
  box-shadow:var(--shadow-hover);
}
.scene-card:hover::after{transform:scaleX(1);}
.scene-card:nth-child(3n+2){margin-top:44px;}
.scene-card:nth-child(3n){margin-top:22px;}
.scene-card-img{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:#141E2E;
}
.scene-card-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.scene-card:hover .scene-card-img img{transform:scale(1.05);}
.scene-card-img .img-fallback{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--text-muted);
}
.scene-card-body{
  padding:24px 24px 28px;
  display:flex;flex-direction:column;flex:1;
}
.scene-card-tag{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  border-radius:24px;
  background:rgba(0,224,198,0.12);
  color:var(--accent);
  font-size:12px;font-weight:600;
  align-self:flex-start;
  margin-bottom:12px;
}
.scene-card h3{
  font-size:20px;font-weight:700;line-height:1.4;
  color:var(--text-primary);
  margin-bottom:12px;
}
.scene-card p{
  font-size:14px;line-height:1.85;
  color:var(--text-secondary);
  flex:1;
  margin-bottom:20px;
}
.scene-card-link{
  font-size:14px;font-weight:600;
  color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
  transition:gap .25s ease;
  text-decoration:none;
}
.scene-card-link:hover{color:var(--accent);gap:10px;text-decoration:none;}

/* ===== Process Steps ===== */
.process-section{padding:80px 0;}
.process-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  margin-top:48px;
}
.process-item{
  position:relative;
  padding:32px 24px;
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,0.03);
  border:1px solid var(--border);
  transition:background .3s ease,border-color .3s ease,transform .3s ease;
  text-align:center;
}
.process-item:hover{
  background:rgba(46,107,255,0.08);
  border-color:rgba(46,107,255,0.3);
  transform:translateY(-4px);
}
.process-num{
  width:52px;height:52px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;
  font-size:20px;font-weight:800;
  color:var(--text-primary);
  background:linear-gradient(135deg,rgba(46,107,255,0.25),rgba(0,224,198,0.12));
  border:1px solid rgba(46,107,255,0.3);
  font-feature-settings:"tnum";
}
.process-item h3{
  font-size:18px;font-weight:700;
  color:var(--text-primary);
  margin-bottom:8px;
}
.process-item p{
  font-size:13px;line-height:1.7;
  color:var(--text-secondary);
}
.process-arrow{
  position:absolute;top:50%;right:-16px;
  width:24px;height:24px;
  color:var(--accent);
  opacity:.6;
  transform:translateY(-50%);
  pointer-events:none;
}
.process-item:last-child .process-arrow{display:none;}

/* ===== Scenario Detail Alternating ===== */
.detail-section{padding:80px 0;}
.detail-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.detail-media{
  position:relative;
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--shadow-hover);
  aspect-ratio:4/3;
  background:#141E2E;
}
.detail-media img{
  width:100%;height:100%;object-fit:cover;
}
.detail-media .media-badge{
  position:absolute;left:16px;bottom:16px;
  padding:6px 16px;
  background:rgba(11,18,32,0.75);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--border-card);
  border-radius:24px;
  font-size:13px;color:var(--text-primary);
}
.detail-content h3{
  font-size:26px;font-weight:800;line-height:1.35;
  color:var(--text-primary);
  margin-bottom:16px;
}
.detail-content h3 .highlight{color:var(--accent);}
.detail-content p{
  font-size:16px;line-height:1.9;
  color:var(--text-secondary);
  margin-bottom:20px;
}
.detail-list{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.detail-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:15px;line-height:1.7;
  color:var(--text-secondary);
}
.detail-list li i{
  flex-shrink:0;
  width:20px;height:20px;
  border-radius:50%;
  background:rgba(0,224,198,0.14);
  color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;font-style:normal;
  margin-top:2px;
}
.detail-media-wrap:nth-child(2){order:-1;}

/* ===== FAQ ===== */
.faq-section{padding:80px 0;}
.faq-title{text-align:center;}
.faq-list{
  max-width:820px;
  margin:48px auto 0;
  display:flex;flex-direction:column;gap:16px;
}
.faq-item{
  background:linear-gradient(135deg,rgba(46,107,255,0.08),rgba(0,224,198,0.03)),rgba(255,255,255,0.03);
  border:1px solid var(--border-card);
  border-radius:var(--radius-lg);
  overflow:hidden;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .3s ease;
}
.faq-item.open{border-color:rgba(46,107,255,0.35);}
.faq-question{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  padding:22px 24px;
  text-align:left;
  font-size:16px;font-weight:600;
  color:var(--text-primary);
  background:transparent;
  transition:background .2s ease;
}
.faq-question:hover{background:rgba(255,255,255,0.03);}
.faq-icon{
  width:24px;height:24px;flex-shrink:0;
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;
  transition:transform .3s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;
  background:var(--accent);
  border-radius:2px;
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease,padding .3s ease;
  padding:0 24px;
}
.faq-item.open .faq-answer{
  max-height:300px;
  padding:0 24px 24px;
}
.faq-answer p{
  font-size:15px;line-height:1.85;
  color:var(--text-secondary);
  padding-top:4px;
  border-top:1px solid rgba(255,255,255,0.06);
}

/* ===== CTA Banner ===== */
.cta-section{padding:80px 0;}
.cta-banner{
  position:relative;
  border-radius:24px;
  overflow:hidden;
  padding:64px 56px;
  text-align:center;
  background:
    linear-gradient(135deg,rgba(46,107,255,0.85),rgba(0,180,216,0.7)),
    url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  box-shadow:0 20px 60px rgba(0,0,0,0.5);
  border:1px solid rgba(255,255,255,0.1);
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(45deg,rgba(255,255,255,0.04) 0,rgba(255,255,255,0.04) 1px,transparent 1px,transparent 16px);
}
.cta-banner .cta-glow{
  position:absolute;width:420px;height:420px;border-radius:50%;
  background:rgba(0,224,198,0.2);filter:blur(80px);
  top:-180px;left:50%;transform:translateX(-50%);
}
.cta-banner h2{
  position:relative;z-index:1;
  font-size:36px;font-weight:800;
  color:#fff;
  margin-bottom:12px;
}
.cta-banner p{
  position:relative;z-index:1;
  font-size:16px;color:rgba(255,255,255,0.9);
  margin-bottom:32px;
}
.cta-banner .btn-primary{
  position:relative;z-index:1;
  background:#fff;color:var(--brand);
  box-shadow:0 0 24px rgba(255,255,255,0.3);
}
.cta-banner .btn-primary:hover{
  filter:brightness(.95);
  transform:translateY(-2px);
  box-shadow:0 0 40px rgba(255,255,255,0.45);
}
.cta-banner .btn-secondary{
  position:relative;z-index:1;
  background:transparent;border:1px solid rgba(255,255,255,0.6);
  color:#fff;
  margin-left:12px;
}
.cta-banner .btn-secondary:hover{
  background:rgba(255,255,255,0.12);
  border-color:#fff;
}

/* ===== Footer ===== */
.site-footer{
  background:#070D18;
  border-top:1px solid rgba(46,107,255,0.25);
  padding:64px 0 24px;
  margin-top:40px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:48px;
  padding-bottom:40px;
  border-bottom:1px solid var(--border);
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  margin-bottom:16px;
}
.footer-brand .logo-icon{display:inline-flex;}
.footer-brand span:last-child{
  font-size:18px;font-weight:800;color:var(--text-primary);
}
.footer-desc{
  font-size:14px;line-height:1.8;
  color:var(--text-muted);
  max-width:280px;
}
.footer-col h4{
  font-size:14px;font-weight:700;
  color:var(--text-primary);
  margin-bottom:16px;
  padding-bottom:8px;
  position:relative;
}
.footer-col h4::after{
  content:"";position:absolute;left:0;bottom:0;
  width:32px;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  border-radius:3px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  font-size:14px;
  color:var(--text-secondary);
  transition:color .2s ease;
  text-decoration:none;
}
.footer-links a:hover{color:var(--accent);text-decoration:underline;}
.footer-contact p{
  font-size:14px;color:var(--text-secondary);
  margin-bottom:8px;
}
.footer-bottom{
  padding-top:24px;
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;
}
.footer-copy{
  font-size:13px;color:var(--text-muted);
}
.footer-legal{
  font-size:12px;color:var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .desktop-nav{display:none;}
  .hamburger{display:flex;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .scene-card:nth-child(3n+2){margin-top:0;}
  .scene-card:nth-child(3n){margin-top:0;}
  .scene-card:nth-child(even){margin-top:32px;}
  .detail-grid{grid-template-columns:1fr;gap:40px;}
  .process-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .process-arrow{display:none;}
}
@media (max-width:767px){
  .site-header{height:64px;}
  .mobile-drawer{top:64px;}
  .brand-text{font-size:18px;}
  .cat-hero{padding:100px 0 48px;min-height:auto;}
  .cat-hero h1{font-size:32px;}
  .cat-hero p{font-size:15px;}
  .cat-intro-card{padding:28px 24px;}
  .scene-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .section-head h2{font-size:28px;}
  .cta-banner{padding:48px 24px;}
  .cta-banner h2{font-size:28px;}
  .cta-banner .btn-primary,.cta-banner .btn-secondary{width:100%;margin:8px 0;}
  .footer-top{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
  .footer-bottom{flex-direction:column;text-align:center;}
  .detail-list li{font-size:14px;}
  .process-grid{grid-template-columns:1fr;}
  .cat-hero .hero-actions .btn{width:100%;}
  .cat-hero .hero-actions .btn-ghost{margin-top:0;}
}
@media (max-width:520px){
  .footer-top{grid-template-columns:1fr;}
  .cat-hero h1{font-size:28px;}
  .brand-text{font-size:16px;}
  .nav-cta{display:none;}
  .btn{padding:12px 20px;}
}

/* roulang page: category3 */
/* ============ Design Tokens ============ */
:root {
  --bg-primary: #0B1220;
  --bg-secondary: #111C2E;
  --bg-deep: #070D18;
  --brand-blue: #2E6BFF;
  --brand-cyan: #00B4D8;
  --accent-cyan: #00E0C6;
  --accent-amber: #F5A623;
  --text-main: #E8EDF7;
  --text-sub: #98A6B8;
  --text-muted: #5E6C82;
  --border: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.06);
  --card-gradient: linear-gradient(135deg, rgba(46, 107, 255, 0.10), rgba(0, 224, 198, 0.04));
  --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 6px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(46, 107, 255, 0.15);
  --btn-primary: linear-gradient(135deg, #2E6BFF, #00B4D8);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --header-height: 72px;
  --container-width: 1200px;
}
/* ============ Reset / Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-blue); text-decoration: none; transition: color 0.2s ease, border-color 0.2s ease; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand-blue); outline-offset: 3px; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: var(--container-width); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section { padding: 90px 0; }
.section-alt { background: var(--bg-secondary); }
.text-sub { color: var(--text-sub); }
.text-muted { color: var(--text-muted); }
/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
  line-height: 1.2;
  text-decoration: none;
}
.btn:active { transform: scale(0.98); opacity: 0.85; }
.btn-primary {
  background: var(--btn-primary);
  color: #fff;
  box-shadow: 0 0 24px rgba(46, 107, 255, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn-primary:hover {
  filter: brightness(1.12);
  box-shadow: 0 0 36px rgba(46, 107, 255, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  text-decoration: none;
  color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 0 16px rgba(46, 107, 255, 0.35); }
.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--text-main);
  min-height: 44px;
  padding: 12px 26px;
}
.btn-secondary:hover {
  border-color: var(--brand-blue);
  background: rgba(46, 107, 255, 0.08);
  color: #fff;
  text-decoration: none;
}
.btn-sm { padding: 8px 18px; font-size: 14px; min-height: 40px; border-radius: 10px; }
/* ============ Header / Nav ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 18, 32, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-soft);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(11, 18, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  transition: height 0.3s ease;
}
.site-header.scrolled .container { height: 60px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: #fff; text-decoration: none; }
.brand-text {
  background: linear-gradient(90deg, #fff, #c9d8f5);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.logo-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(46, 107, 255, 0.12);
  border: 1px solid rgba(46, 107, 255, 0.3);
}
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  display: inline-block;
  position: relative;
  color: var(--text-sub);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 3px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--accent-cyan));
  transition: left 0.25s ease, right 0.25s ease;
}
.main-nav a:hover { color: var(--brand-blue); text-decoration: none; }
.main-nav a:hover::after { left: 16px; right: 16px; }
.main-nav a.active { color: #fff; font-weight: 700; }
.main-nav a.active::after { left: 16px; right: 16px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 8px;
  background: transparent;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  margin: 0 auto;
}
.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); }
/* ============ Banner ============ */
.cat-banner {
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  padding: 140px 0 64px;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
}
.cat-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 18, 32, 0.92) 0%, rgba(11, 18, 32, 0.72) 50%, rgba(11, 18, 32, 0.45) 100%);
  z-index: 1;
}
.cat-banner::after {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(0, 224, 198, 0.18), transparent 70%);
  z-index: 0;
}
.cat-banner .banner-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.cat-banner .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 18px;
}
.cat-banner .breadcrumb a { color: var(--text-sub); text-decoration: none; transition: color 0.2s ease; }
.cat-banner .breadcrumb a:hover { color: var(--brand-blue); }
.cat-banner .breadcrumb .current { color: var(--accent-cyan); }
.cat-banner h1 {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 0.01em;
  margin-bottom: 16px;
  color: #fff;
}
.cat-banner h1 .highlight {
  color: var(--accent-cyan);
  position: relative;
}
.cat-banner .banner-sub {
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 620px;
}
/* ============ Intro ============ */
.intro-section { position: relative; }
.intro-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 107, 255, 0.5), rgba(0, 224, 198, 0.5), transparent);
}
.intro-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 60px;
  align-items: center;
}
.intro-copy .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: rgba(0, 224, 198, 0.12);
  border-radius: 24px;
  padding: 4px 14px;
  margin-bottom: 16px;
}
.intro-copy h2 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-main);
}
.intro-copy h2 .accent { color: var(--brand-blue); }
.intro-copy p { color: var(--text-sub); font-size: 16px; line-height: 1.8; margin-bottom: 14px; }
.intro-copy p:last-child { margin-bottom: 0; }
.intro-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 240px;
  background-image: url('/assets/images/coverpic/cover-1.webp');
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
}
.intro-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.25), rgba(0, 224, 198, 0.08));
}
.intro-visual .visual-caption {
  position: absolute;
  z-index: 2;
  left: 16px;
  bottom: 16px;
  background: rgba(11, 18, 32, 0.8);
  backdrop-filter: blur(12px);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
/* ============ Content Cards (首卡横置 + 双列) ============ */
.cards-section { background: var(--bg-secondary); }
.section-header { margin-bottom: 48px; max-width: 720px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: rgba(0, 224, 198, 0.12);
  border-radius: 24px;
  padding: 4px 14px;
  margin-bottom: 14px;
}
.section-header h2 { font-size: 34px; line-height: 1.3; font-weight: 700; color: var(--text-main); }
.section-header h2 .accent { color: var(--brand-blue); }
.section-header p { color: var(--text-sub); font-size: 16px; margin-top: 12px; line-height: 1.7; }
.feature-card {
  background: var(--card-gradient);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
}
.feature-card::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--brand-blue), var(--accent-cyan));
  transition: width 0.3s ease;
}
.feature-card:hover {
  border-color: rgba(0, 224, 198, 0.4);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-card:hover::after { width: 100%; }
.feature-card .card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #141E2E;
}
.feature-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.feature-card:hover .card-img img { transform: scale(1.04); }
.feature-card .card-body { padding: 24px; }
.feature-card .card-body h3 { font-size: 20px; font-weight: 600; color: var(--text-main); margin-bottom: 10px; line-height: 1.4; }
.feature-card .card-body p { color: var(--text-sub); font-size: 15px; line-height: 1.75; margin-bottom: 16px; }
.feature-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-blue);
  text-decoration: none;
  transition: color 0.2s ease, gap 0.2s ease;
}
.feature-card .card-link:hover { color: var(--accent-cyan); gap: 10px; text-decoration: none; }
/* 首卡横置 */
.card-large {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  margin-bottom: 28px;
}
.card-large .card-img { aspect-ratio: auto; min-height: 100%; }
.card-large .card-body { display: flex; flex-direction: column; justify-content: center; padding: 36px; }
.card-large .card-body h3 { font-size: 24px; }
.card-large .card-body p { font-size: 16px; }
/* 下方双列 */
.cards-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
/* ============ Steps ============ */
.steps-section { position: relative; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 44px;
}
.step-item {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px 28px;
  backdrop-filter: blur(10px);
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}
.step-item:hover {
  border-color: rgba(0, 224, 198, 0.3);
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.12), rgba(0, 224, 198, 0.06));
  transform: translateY(-3px);
}
.step-num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  font-feature-settings: "tnum";
  color: #fff;
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  box-shadow: 0 0 20px rgba(46, 107, 255, 0.35);
  margin-bottom: 18px;
}
.step-item h3 { font-size: 18px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }
/* ============ Feature Icons ============ */
.features-section { background: var(--bg-secondary); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-icon-item {
  background: var(--card-gradient);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.feature-icon-item:hover {
  border-color: rgba(0, 224, 198, 0.4);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-icon-item .icon-wrap {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: rgba(46, 107, 255, 0.12);
  border: 1px solid rgba(46, 107, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-icon-item h3 { font-size: 18px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; }
.feature-icon-item p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }
/* ============ FAQ ============ */
.faq-section { position: relative; }
.faq-list { max-width: 820px; margin: 0 auto; margin-top: 44px; }
.faq-item {
  background: var(--card-gradient);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.faq-item:hover { border-color: rgba(0, 224, 198, 0.3); }
.faq-item.active { border-color: rgba(0, 224, 198, 0.4); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  min-height: 60px;
}
.faq-question .faq-icon {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(46, 107, 255, 0.15);
  border: 1px solid rgba(46, 107, 255, 0.3);
  position: relative;
  transition: transform 0.3s ease, background 0.3s ease;
}
.faq-question .faq-icon::before, .faq-question .faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--accent-cyan);
  transition: background 0.3s ease;
}
.faq-question .faq-icon::before { width: 12px; height: 1.6px; transform: translate(-50%, -50%); }
.faq-question .faq-icon::after { width: 1.6px; height: 12px; transform: translate(-50%, -50%); }
.faq-item.active .faq-icon { transform: rotate(45deg); background: rgba(0, 224, 198, 0.2); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-answer-inner { padding: 0 24px 22px; color: var(--text-sub); font-size: 15px; line-height: 1.8; border-top: 1px solid var(--border-soft); padding-top: 18px; }
/* ============ CTA ============ */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: linear-gradient(135deg, #0B1220 0%, #11224a 55%, #0b2c36 100%);
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(46, 107, 255, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 107, 255, 0.18) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.25;
}
.cta-section::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 224, 198, 0.12), transparent 65%);
  pointer-events: none;
}
.cta-content { position: relative; z-index: 1; text-align: center; max-width: 720px; margin: 0 auto; }
.cta-content h2 { font-size: 38px; font-weight: 800; color: #fff; line-height: 1.3; margin-bottom: 16px; }
.cta-content h2 .accent { color: var(--accent-cyan); }
.cta-content p { font-size: 17px; color: var(--text-sub); margin-bottom: 32px; line-height: 1.7; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
/* ============ Footer ============ */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--brand-blue), var(--accent-cyan));
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.2fr 1.6fr;
  gap: 44px;
  padding: 64px 0 48px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand .logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(46, 107, 255, 0.12);
  border: 1px solid rgba(46, 107, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-brand span { font-size: 18px; font-weight: 700; color: var(--text-main); }
.footer-desc { font-size: 14px; color: var(--text-muted); line-height: 1.8; max-width: 300px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.06em;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--accent-cyan));
}
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: var(--text-sub); text-decoration: none; transition: color 0.2s ease, padding-left 0.2s ease; }
.footer-links a:hover { color: var(--accent-cyan); padding-left: 4px; }
.footer-contact p { font-size: 14px; color: var(--text-sub); margin-bottom: 6px; line-height: 1.6; }
.footer-bottom {
  border-top: 1px solid var(--border-soft);
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}
/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .intro-visual { min-height: 220px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-toggle { display: flex; }
  .site-header .container { height: 60px; }
  .main-nav, .site-header.scrolled .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 82vw);
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    background: rgba(11, 18, 32, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    padding: 88px 28px 40px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 999;
    overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { font-size: 18px; padding: 14px 16px; width: 100%; }
  .main-nav a::after { display: none; }
  .main-nav a.active, .main-nav a:hover { background: rgba(46, 107, 255, 0.12); color: #fff; border-radius: 10px; }
  .brand { font-size: 16px; }
  .cat-banner { padding: 110px 0 48px; min-height: 260px; }
  .cat-banner h1 { font-size: 30px; }
  .cat-banner .banner-sub { font-size: 15px; }
  .card-large { grid-template-columns: 1fr; }
  .card-large .card-img { min-height: 200px; }
  .cards-duo { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .cta-content h2 { font-size: 30px; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; padding: 48px 0 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .cat-banner h1 { font-size: 26px; }
  .section-header h2 { font-size: 28px; }
  .cta-content h2 { font-size: 26px; }
  .cta-buttons .btn { width: 100%; }
}