/* roulang page: index */
:root {
  --bg-primary: #0A0E17;
  --bg-secondary: #101A2D;
  --bg-alt: #0D1424;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.12);
  --accent-blue: #3B82F6;
  --accent-cyan: #22D3EE;
  --accent-gold: #F59E0B;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 20px rgba(59,130,246,0.45), 0 0 40px rgba(34,211,238,0.18);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
input, button { font-family: inherit; outline: none; }

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

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); height: 44px; min-width: 112px;
  padding: 0 22px; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: 1px solid transparent;
  transition: all .28s ease;
}
.btn-primary {
  background: linear-gradient(135deg, #3B82F6 0%, #22D3EE 100%);
  color: #fff; box-shadow: 0 0 20px rgba(59,130,246,0.35);
}
.btn-primary:hover {
  box-shadow: 0 0 28px rgba(59,130,246,0.55), 0 4px 18px rgba(34,211,238,0.3);
  transform: translateY(-2px);
}
.btn-ghost {
  background: rgba(255,255,255,0.06); border-color: var(--glass-border);
  color: var(--text-primary); backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.25); }
.btn-gold {
  background: linear-gradient(135deg, #F59E0B 0%, #F97316 100%);
  color: #fff; box-shadow: 0 0 20px rgba(245,158,11,0.4);
}
.btn-gold:hover { box-shadow: 0 0 28px rgba(245,158,11,0.55); transform: translateY(-2px); }
.btn-cyanglow {
  background: linear-gradient(135deg, #3B82F6, #22D3EE);
  color: #fff; box-shadow: 0 0 20px rgba(34,211,238,0.35);
}
.btn-cyanglow:hover { box-shadow: 0 0 28px rgba(34,211,238,0.5); transform: translateY(-2px); }

.badge {
  display: inline-flex; align-items: center;
  font-size: 0.75rem; font-weight: 600;
  border-radius: 999px; padding: 4px 14px;
  background: rgba(59,130,246,0.15); color: #7DD0FF;
  border: 1px solid rgba(59,130,246,0.25);
}

/* Header / Nav */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 64px; display: flex; align-items: center;
  background: transparent; border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease;
}
.site-header.scrolled {
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(12px);
  border-bottom-color: rgba(255,255,255,0.06);
  box-shadow: 0 4px 24px rgba(0,0,0,0.35);
}
.nav-wrap {
  max-width: 1200px; width: 100%; margin: 0 auto;
  padding: 0 24px; display: flex; align-items: center; justify-content: space-between;
}
.nav-left { display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.15rem; font-weight: 800; letter-spacing: -0.01em; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, #3B82F6, #22D3EE);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #fff;
  box-shadow: 0 0 14px rgba(59,130,246,0.5);
}
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); position: relative; padding: 6px 2px; }
.nav-links a:hover { color: var(--text-primary); }
.nav-links a.active { color: var(--accent-blue); font-weight: 600; }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: linear-gradient(90deg, #3B82F6, #22D3EE); border-radius: 2px;
}
.nav-right { display: flex; align-items: center; gap: 16px; }
.search-box {
  display: flex; align-items: center;
  width: 200px; height: 38px; border-radius: 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  transition: border-color .3s ease, box-shadow .3s ease;
  overflow: hidden;
}
.search-box:focus-within {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.search-box input {
  flex: 1; background: transparent; border: none; color: var(--text-primary);
  padding: 0 12px; font-size: 0.85rem; height: 100%;
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box button {
  height: 100%; padding: 0 14px; background: transparent; border: none;
  color: var(--text-secondary); cursor: pointer; font-size: 0.85rem;
  transition: color .2s;
}
.search-box button:hover { color: var(--accent-blue); }

.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 24px; cursor: pointer; width: 40px; height: 40px; align-items: center; justify-content: center; }
.mobile-menu {
  position: fixed; top: 64px; left: 0; right: 0; z-index: 99;
  background: rgba(10,14,23,0.95); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: none; flex-direction: column; padding: 24px; gap: 18px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1rem; color: var(--text-secondary); padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.mobile-menu a.active { color: var(--accent-blue); }
.mobile-menu a:last-child { border-bottom: none; }

/* Hero */
.hero {
  position: relative; min-height: calc(100vh - 64px); padding-top: 64px;
  display: flex; align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 20%, rgba(34,211,238,0.18), transparent 42%),
    radial-gradient(circle at 20% 70%, rgba(59,130,246,0.18), transparent 45%),
    linear-gradient(180deg, #0A0E17 0%, #0D1424 100%);
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.35;
}
.hero-inner {
  position: relative; z-index: 2; width: 100%;
  display: grid; grid-template-columns: 58% 42%; gap: 48px; align-items: center;
  padding-top: 40px; padding-bottom: 64px;
}
.hero-text h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800; line-height: 1.2; letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.hero-text .sub {
  font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 28px;
  max-width: 440px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-visual-top-space { height: 68px; }
.hero-img-wrap {
  height: 380px; border-radius: var(--radius-lg);
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover; background-position: center;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-card);
  position: relative;
}
.float-card {
  position: absolute; background: rgba(255,255,255,0.07);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 14px; padding: 16px 20px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
  min-width: 170px;
}
.float-card .fc-num { font-size: 1.5rem; font-weight: 800; color: var(--accent-cyan); }
.float-card .fc-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 2px; }
.float-card.card-1 { top: 110px; right: -30px; }
.float-card.card-2 { bottom: 40px; left: -40px; }
.float-card.card-3 { top: -20px; left: 30px; }

/* Section general */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 40px; }
.section-head .sec-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--accent-cyan); font-weight: 600;
  margin-bottom: 8px; letter-spacing: 0.04em;
}
.section-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem); font-weight: 700; line-height: 1.3;
  display: flex; align-items: center; gap: 12px;
}
.sec-num {
  font-size: 0.9rem; font-weight: 700; color: var(--accent-blue);
  background: rgba(59,130,246,0.15); border-radius: 6px;
  padding: 2px 10px; letter-spacing: 0.02em;
}
.section-sub { font-size: 0.95rem; color: var(--text-secondary); margin-top: 8px; }

/* Catalog */
.catalog-list { display: flex; flex-direction: column; }
.catalog-item {
  display: flex; align-items: center; gap: 32px;
  padding: 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background .25s ease, padding-left .25s ease;
}
.catalog-item:hover { background: rgba(255,255,255,0.04); padding-left: 28px; }
.catalog-num {
  font-size: 1.8rem; font-weight: 700; color: var(--accent-blue);
  min-width: 72px; opacity: 0.75; transition: opacity .2s;
}
.catalog-item:hover .catalog-num { opacity: 1; }
.catalog-title { font-size: 1.15rem; font-weight: 600; min-width: 160px; }
.catalog-desc { font-size: 0.88rem; color: var(--text-secondary); flex: 1; }

/* Featured */
.featured-item {
  display: grid; grid-template-columns: 40% 60%; gap: 0;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  overflow: hidden;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
  transition: border-color .3s, box-shadow .3s;
}
.featured-item:hover {
  border-color: rgba(59,130,246,0.4);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}
.featured-item:nth-child(even) { direction: rtl; }
.featured-item > * { direction: ltr; }
.featured-img { min-height: 220px; background-size: cover; background-position: center; }
.featured-body { padding: 32px; display: flex; flex-direction: column; justify-content: center; gap: 12px; }
.featured-body h3 { font-size: 1.2rem; font-weight: 600; line-height: 1.4; }
.featured-body p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }
.featured-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent-cyan); font-size: 0.88rem; font-weight: 600;
  margin-top: 6px; transition: gap .25s;
}
.featured-link:hover { gap: 12px; }

/* Recommend slider */
.recommend-row {
  display: flex; gap: 20px; overflow-x: auto; padding-bottom: 12px; scrollbar-width: none;
}
.recommend-row::-webkit-scrollbar { display: none; }
.rec-card {
  min-width: 230px; max-width: 230px; flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  overflow: hidden; transition: border-color .25s, transform .25s;
}
.rec-card:hover { border-color: rgba(59,130,246,0.4); transform: translateY(-3px); }
.rec-card img { height: 96px; width: 100%; object-fit: cover; }
.rec-card .rec-body { padding: 14px; }
.rec-card h4 { font-size: 0.9rem; font-weight: 600; line-height: 1.4; margin-bottom: 6px; }
.rec-card .rec-tag {
  font-size: 0.7rem; border-radius: 999px; padding: 2px 10px;
  background: rgba(59,130,246,0.12); color: #7DD0FF; display: inline-block;
}

/* News (CMS list) */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 20px; align-items: center;
  padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background .2s;
}
.news-item:hover { background: rgba(255,255,255,0.02); }
.news-time { font-size: 0.82rem; color: var(--text-muted); white-space: nowrap; }
.news-title { font-weight: 600; font-size: 1rem; transition: color .2s; }
.news-title:hover { color: var(--accent-blue); }
.news-cat { font-size: 0.72rem; border-radius: 999px; padding: 3px 12px; background: rgba(255,255,255,0.06); color: var(--text-secondary); white-space: nowrap; }
.news-summary { grid-column: 2 / -1; font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; }
.news-empty {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
  border: 1px dashed rgba(255,255,255,0.12); border-radius: var(--radius-lg);
  font-size: 0.95rem;
}

/* CTA */
.cta-section { padding: 80px 0; }
.cta-box {
  max-width: 640px; margin: 0 auto; position: relative;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 24px; padding: 56px 40px; text-align: center;
  overflow: hidden;
}
.cta-box::before {
  content: ''; position: absolute; top: -40%; right: -30%; width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(34,211,238,0.35), transparent 70%);
  pointer-events: none;
}
.cta-box::after {
  content: ''; position: absolute; bottom: -40%; left: -30%; width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(59,130,246,0.3), transparent 70%);
  pointer-events: none;
}
.cta-box h2 { font-size: 1.7rem; font-weight: 700; margin-bottom: 10px; position: relative; z-index: 1; }
.cta-box p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 30px; position: relative; z-index: 1; }
.cta-box .cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }
.copy-tip { font-size: 0.8rem; color: var(--accent-cyan); margin-top: 12px; min-height: 18px; }

/* FAQ */
.faq-wrap { max-width: 768px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s;
}
.faq-item:hover { border-color: rgba(255,255,255,0.22); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; cursor: pointer; user-select: none;
}
.faq-q h3 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.faq-icon {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--text-secondary);
  transition: transform .3s ease, background .3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(59,130,246,0.2); color: var(--accent-blue); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 0.92rem; line-height: 1.75;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 20px; }

/* Footer */
.site-footer {
  background: #070B12;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 32px;
  margin-top: 30px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 48px; margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-secondary); max-width: 260px; }
.footer-col h5 { font-size: 0.95rem; font-weight: 600; margin-bottom: 18px; color: var(--text-primary); }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: 0.88rem; color: var(--text-secondary); }
.footer-col ul a:hover { color: var(--accent-cyan); }
.footer-sub { display: flex; gap: 8px; }
.footer-sub input {
  flex: 1; height: 40px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border); background: rgba(255,255,255,0.06);
  padding: 0 14px; color: var(--text-primary); font-size: 0.85rem;
}
.footer-sub input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
.footer-sub button {
  height: 40px; padding: 0 20px; border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg, #F59E0B, #F97316); color: #fff; font-weight: 600;
  cursor: pointer; font-size: 0.85rem; transition: transform .2s, box-shadow .2s;
}
.footer-sub button:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(245,158,11,0.4); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 0.8rem; color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .address-info { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .nav-links { display: none; }
  .nav-right .search-box { display: none; }
  .nav-right .btn-primary { display: none; }
  .nav-toggle { display: flex; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 24px; }
  .hero { min-height: auto; padding-bottom: 40px; }
  .hero-text h1 { font-size: 2.2rem; }
  .hero-visual { margin-top: 24px; }
  .hero-visual-top-space { display: none; }
  .featured-item { grid-template-columns: 1fr; }
  .featured-item:nth-child(even) { direction: ltr; }
  .featured-img { min-height: 180px; }
  .catalog-item { flex-wrap: wrap; gap: 10px; padding: 18px 12px; }
  .catalog-num { min-width: 50px; font-size: 1.4rem; }
  .catalog-desc { width: 100%; padding-left: 82px; }
  .news-item { grid-template-columns: 1fr; gap: 6px; padding: 16px 0; }
  .news-time { font-size: 0.78rem; }
  .news-summary { grid-column: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .float-card.card-1 { right: -10px; }
  .float-card.card-2 { left: -10px; }
}
@media (max-width: 520px) {
  .container { padding-left: 18px; padding-right: 18px; }
  .hero-text h1 { font-size: 1.8rem; }
  .hero-btns .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 40px 22px; }
}

/* roulang page: category1 */
:root {
        --bg-primary: #0A0E17;
        --bg-secondary: #101A2D;
        --bg-section: #0D1424;
        --glass-bg: rgba(255,255,255,0.05);
        --glass-border: rgba(255,255,255,0.12);
        --accent: #3B82F6;
        --accent-2: #22D3EE;
        --accent-3: #F59E0B;
        --text-primary: #F1F5F9;
        --text-secondary: #94A3B8;
        --text-muted: #64748B;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
        --shadow-glow: 0 0 20px rgba(59,130,246,0.45), 0 0 40px rgba(34,211,238,0.18);
        --shadow-glow-accent: 0 0 20px rgba(245,158,11,0.35), 0 0 40px rgba(245,158,11,0.15);
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        background: var(--bg-primary);
        color: var(--text-primary);
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        line-height: 1.75;
        font-size: 1rem;
        min-height: 100vh;
        background-image: radial-gradient(rgba(255,255,255,0.045) 1px, transparent 1px);
        background-size: 24px 24px;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

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

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

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

    /* ========== Buttons ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        min-width: 112px;
        height: 44px;
        padding: 0 22px;
        border-radius: 10px;
        font-size: 0.95rem;
        font-weight: 600;
        transition: all 0.3s ease;
        cursor: pointer;
        white-space: nowrap;
    }

    .btn-primary {
        background: linear-gradient(135deg, #3B82F6, #22D3EE);
        color: #fff;
        box-shadow: var(--shadow-glow);
    }

    .btn-primary:hover {
        filter: brightness(1.1);
        transform: translateY(-2px);
        box-shadow: 0 0 28px rgba(59,130,246,0.6), 0 0 50px rgba(34,211,238,0.25);
    }

    .btn-ghost {
        background: transparent;
        border: 1px solid rgba(255,255,255,0.25);
        color: var(--text-primary);
    }

    .btn-ghost:hover {
        background: rgba(255,255,255,0.08);
        border-color: rgba(255,255,255,0.45);
    }

    .btn-accent {
        background: linear-gradient(135deg, #F59E0B, #FBBF24);
        color: #101A2D;
        box-shadow: var(--shadow-glow-accent);
        font-weight: 700;
    }

    .btn-accent:hover {
        filter: brightness(1.08);
        transform: translateY(-2px);
    }

    /* ========== Header / Nav ========== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 64px;
        z-index: 999;
        background: transparent;
        border-bottom: 1px solid transparent;
        transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    }

    .site-header.scrolled {
        background: rgba(10,14,23,0.85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom-color: rgba(255,255,255,0.06);
        box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    }

    .nav-wrap {
        max-width: 1200px;
        height: 64px;
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .nav-left {
        display: flex;
        align-items: center;
        gap: 32px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.15rem;
        font-weight: 800;
        letter-spacing: 0.01em;
    }

    .logo-mark {
        width: 34px;
        height: 34px;
        border-radius: 9px;
        background: linear-gradient(135deg, #3B82F6, #22D3EE);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        font-weight: 800;
        color: #fff;
        box-shadow: 0 0 14px rgba(59,130,246,0.5);
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 26px;
    }

    .nav-links a {
        font-size: 0.92rem;
        color: var(--text-secondary);
        transition: color 0.3s;
        position: relative;
        padding: 4px 0;
    }

    .nav-links a:hover {
        color: var(--text-primary);
    }

    .nav-links a.active {
        color: var(--accent-2);
    }

    .nav-links a.active::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 100%;
        height: 2px;
        background: var(--accent-2);
        border-radius: 2px;
    }

    .nav-right {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: rgba(255,255,255,0.05);
        border: 1px solid rgba(255,255,255,0.12);
        border-radius: 10px;
        height: 38px;
        padding: 0 8px 0 14px;
        transition: border-color 0.3s, box-shadow 0.3s;
    }

    .search-box input {
        background: transparent;
        border: none;
        color: var(--text-primary);
        font-size: 0.85rem;
        width: 160px;
    }

    .search-box input::placeholder {
        color: var(--text-muted);
    }

    .search-box button {
        background: transparent;
        color: var(--text-secondary);
        width: 28px;
        height: 28px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 6px;
        cursor: pointer;
        transition: color 0.3s, background 0.3s;
    }

    .search-box button:hover {
        color: var(--accent-2);
        background: rgba(255,255,255,0.08);
    }

    .search-box:focus-within {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
    }

    .nav-toggle {
        display: none;
        background: transparent;
        color: var(--text-primary);
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        border-radius: 8px;
        transition: background 0.3s;
    }

    .nav-toggle:hover {
        background: rgba(255,255,255,0.08);
    }

    .mobile-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(10,14,23,0.95);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(255,255,255,0.06);
        padding: 16px 24px 24px;
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 998;
    }

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

    .mobile-menu a {
        display: block;
        padding: 12px 14px;
        margin-bottom: 6px;
        border-radius: 10px;
        font-size: 0.95rem;
        color: var(--text-secondary);
        background: rgba(255,255,255,0.02);
        transition: all 0.3s;
    }

    .mobile-menu a:hover {
        background: rgba(255,255,255,0.08);
        color: var(--text-primary);
    }

    .mobile-menu a.active {
        color: var(--accent-2);
        background: rgba(34,211,238,0.08);
    }

    /* ========== Page Banner ========== */
    .page-banner {
        position: relative;
        min-height: 300px;
        display: flex;
        align-items: center;
        padding-top: 64px;
        background-image: linear-gradient(90deg, rgba(10,14,23,0.92) 0%, rgba(16,26,45,0.78) 100%), url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
    }

    .page-banner::before {
        content: "";
        position: absolute;
        top: -40%;
        right: 5%;
        width: 420px;
        height: 420px;
        background: radial-gradient(circle, rgba(34,211,238,0.12) 0%, rgba(34,211,238,0.02) 60%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }

    .banner-content {
        position: relative;
        z-index: 2;
        padding: 60px 0;
        max-width: 720px;
    }

    .banner-crumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 18px;
    }

    .banner-crumb a {
        transition: color 0.3s;
    }

    .banner-crumb a:hover {
        color: var(--accent-2);
    }

    .banner-crumb .sep {
        color: rgba(255,255,255,0.2);
    }

    .page-banner h1 {
        font-size: clamp(1.9rem, 3.4vw, 2.8rem);
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: -0.01em;
        margin-bottom: 16px;
        color: #fff;
    }

    .banner-desc {
        font-size: 1.02rem;
        color: rgba(241,245,249,0.8);
        max-width: 580px;
        line-height: 1.8;
    }

    /* ========== Section ========== */
    .section {
        padding: 96px 0;
    }

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

    .section-head {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-bottom: 40px;
    }

    .section-no {
        font-size: 0.85rem;
        font-weight: 700;
        color: var(--accent-2);
        letter-spacing: 0.02em;
        background: rgba(34,211,238,0.1);
        padding: 4px 12px;
        border-radius: 20px;
        white-space: nowrap;
    }

    .section-head h2 {
        font-size: clamp(1.4rem, 2.4vw, 1.9rem);
        font-weight: 700;
        line-height: 1.3;
    }

    .section-sub {
        font-size: 0.95rem;
        color: var(--text-secondary);
        margin-top: -32px;
        margin-bottom: 40px;
    }

    /* ========== Intro ========== */
    .intro-wrap {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .intro-wrap p {
        color: var(--text-secondary);
        font-size: 0.98rem;
        line-height: 1.85;
        text-align: justify;
    }

    /* ========== Cards / Features ========== */
    .glass-card {
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
    }

    .glass-card:hover {
        border-color: rgba(59,130,246,0.4);
        box-shadow: 0 12px 40px rgba(0,0,0,0.5);
        transform: translateY(-2px);
    }

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

    .feature-card {
        padding: 30px 26px;
        position: relative;
        overflow: hidden;
    }

    .feature-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background: linear-gradient(180deg, #3B82F6, #22D3EE);
        opacity: 0.6;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(34,211,238,0.12));
        border: 1px solid rgba(59,130,246,0.25);
        color: var(--accent-2);
        margin-bottom: 18px;
    }

    .feature-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--text-primary);
    }

    .feature-card p {
        font-size: 0.88rem;
        line-height: 1.7;
        color: var(--text-secondary);
    }

    /* ========== Content Cards ========== */
    .content-list {
        display: grid;
        gap: 24px;
    }

    .content-card {
        display: grid;
        grid-template-columns: 40% 60%;
        gap: 0;
        border-radius: var(--radius);
        overflow: hidden;
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
    }

    .content-card:nth-child(even) {
        grid-template-columns: 60% 40%;
    }

    .content-card:nth-child(even) .content-media {
        order: 2;
    }

    .content-card:hover {
        border-color: rgba(59,130,246,0.4);
        box-shadow: 0 12px 40px rgba(0,0,0,0.5);
        transform: translateY(-3px);
    }

    .content-media {
        min-height: 220px;
        overflow: hidden;
        position: relative;
    }

    .content-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
        inset: 0;
        transition: transform 0.6s ease;
    }

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

    .content-body {
        padding: 30px 34px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .badge {
        display: inline-flex;
        align-items: center;
        align-self: flex-start;
        padding: 4px 12px;
        border-radius: 999px;
        font-size: 0.8rem;
        font-weight: 600;
        background: rgba(59,130,246,0.14);
        color: #7FB4FF;
        margin-bottom: 14px;
    }

    .content-body h3 {
        font-size: 1.18rem;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--text-primary);
    }

    .content-body p {
        font-size: 0.9rem;
        line-height: 1.72;
        color: var(--text-secondary);
        margin-bottom: 16px;
    }

    .read-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 0.88rem;
        font-weight: 600;
        color: var(--accent-2);
        transition: gap 0.3s;
    }

    .read-link:hover {
        gap: 12px;
    }

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

    .stat-card {
        padding: 32px 24px;
        text-align: center;
        border-radius: var(--radius);
        background: rgba(255,255,255,0.04);
        border: 1px solid rgba(255,255,255,0.1);
        transition: all 0.3s ease;
    }

    .stat-card:hover {
        border-color: rgba(34,211,238,0.4);
        background: rgba(255,255,255,0.06);
        transform: translateY(-3px);
    }

    .stat-num {
        font-size: 2.2rem;
        font-weight: 800;
        background: linear-gradient(135deg, #3B82F6, #22D3EE);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        line-height: 1.2;
        margin-bottom: 6px;
    }

    .stat-label {
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 4px;
    }

    .stat-desc {
        font-size: 0.82rem;
        color: var(--text-muted);
    }

    /* ========== FAQ ========== */
    .faq-wrap {
        max-width: 768px;
        margin: 0 auto;
        display: grid;
        gap: 12px;
    }

    .faq-item {
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: 14px;
        overflow: hidden;
        transition: border-color 0.3s;
    }

    .faq-item.open {
        border-color: rgba(59,130,246,0.4);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 20px 24px;
        cursor: pointer;
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-primary);
        transition: color 0.3s;
    }

    .faq-question:hover {
        color: var(--accent-2);
    }

    .faq-toggle {
        width: 28px;
        height: 28px;
        min-width: 28px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255,255,255,0.08);
        color: var(--text-secondary);
        font-size: 1.1rem;
        transition: transform 0.3s, background 0.3s, color 0.3s;
    }

    .faq-item.open .faq-toggle {
        transform: rotate(45deg);
        background: rgba(59,130,246,0.2);
        color: var(--accent-2);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        padding: 0 24px;
    }

    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    .faq-answer p {
        font-size: 0.92rem;
        line-height: 1.7;
        color: var(--text-secondary);
        text-align: justify;
    }

    /* ========== CTA ========== */
    .cta-box {
        max-width: 640px;
        margin: 0 auto;
        text-align: center;
        padding: 56px 44px;
        border-radius: 20px;
        position: relative;
        overflow: hidden;
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        box-shadow: var(--shadow-card);
    }

    .cta-box::before {
        content: "";
        position: absolute;
        top: -60%;
        left: -30%;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(59,130,246,0.14) 0%, transparent 70%);
        pointer-events: none;
    }

    .cta-box::after {
        content: "";
        position: absolute;
        bottom: -60%;
        right: -30%;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(34,211,238,0.14) 0%, transparent 70%);
        pointer-events: none;
    }

    .cta-box h2 {
        font-size: clamp(1.3rem, 2.4vw, 1.8rem);
        font-weight: 800;
        margin-bottom: 12px;
        color: var(--text-primary);
        position: relative;
        z-index: 2;
    }

    .cta-box p {
        font-size: 0.95rem;
        color: var(--text-secondary);
        margin-bottom: 28px;
        position: relative;
        z-index: 2;
    }

    .cta-btns {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
        position: relative;
        z-index: 2;
    }

    /* ========== Footer ========== */
    .site-footer {
        background: #070B12;
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: 72px;
        padding-bottom: 32px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 48px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .footer-brand p {
        font-size: 0.88rem;
        color: var(--text-secondary);
        margin-top: 16px;
        line-height: 1.7;
        max-width: 260px;
    }

    .footer-col h5 {
        font-size: 0.95rem;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 16px;
    }

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

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

    .footer-col ul a {
        font-size: 0.88rem;
        color: var(--text-muted);
        transition: color 0.3s, padding-left 0.3s;
    }

    .footer-col ul a:hover {
        color: var(--accent-2);
        padding-left: 4px;
    }

    .footer-sub {
        display: flex;
        gap: 8px;
        margin-top: 12px;
    }

    .footer-sub input {
        flex: 1;
        height: 38px;
        padding: 0 12px;
        border-radius: 8px;
        background: rgba(255,255,255,0.05);
        border: 1px solid rgba(255,255,255,0.12);
        color: var(--text-primary);
        font-size: 0.85rem;
        transition: border-color 0.3s, box-shadow 0.3s;
    }

    .footer-sub input::placeholder {
        color: var(--text-muted);
    }

    .footer-sub input:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
    }

    .footer-sub button {
        height: 38px;
        padding: 0 16px;
        border-radius: 8px;
        background: linear-gradient(135deg, #F59E0B, #FBBF24);
        color: #101A2D;
        font-weight: 700;
        font-size: 0.85rem;
        cursor: pointer;
        transition: filter 0.3s, transform 0.3s;
        white-space: nowrap;
    }

    .footer-sub button:hover {
        filter: brightness(1.1);
        transform: translateY(-1px);
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        padding-top: 24px;
        font-size: 0.82rem;
        color: var(--text-muted);
    }

    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
        .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }

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

        .content-card,
        .content-card:nth-child(even) {
            grid-template-columns: 1fr;
        }

        .content-card:nth-child(even) .content-media {
            order: 0;
        }

        .content-media {
            height: 240px;
            min-height: auto;
        }

        .content-media img {
            position: static;
            height: 240px;
        }

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

        .nav-links {
            display: none;
        }

        .nav-toggle {
            display: flex;
        }

        .mobile-menu {
            display: block;
        }

        .search-box input {
            width: 120px;
        }

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

    @media (max-width: 768px) {
        .section {
            padding: 56px 0;
        }

        .page-banner {
            min-height: 260px;
        }

        .banner-content {
            padding: 40px 0;
        }

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

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

        .stat-card {
            padding: 24px 16px;
        }

        .stat-num {
            font-size: 1.7rem;
        }

        .cta-box {
            padding: 40px 24px;
        }

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

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

        .search-box {
            display: none;
        }

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

        .cta-btns .btn {
            min-width: 100px;
            padding: 0 16px;
        }

        .content-body {
            padding: 24px 20px;
        }

        .section-head {
            flex-wrap: wrap;
        }
    }

    @media (max-width: 768px) {
        .mobile-menu {
            display: block;
        }
    }

/* roulang page: article */
:root {
  --bg-primary: #0A0E17;
  --bg-secondary: #101A2D;
  --bg-alt: #0D1424;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.12);
  --accent-blue: #3B82F6;
  --accent-cyan: #22D3EE;
  --accent-amber: #F59E0B;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 20px rgba(59,130,246,0.45), 0 0 40px rgba(34,211,238,0.18);
  --container: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font-family: inherit; font-size: 100%; border: none; outline: none; background: none; color: inherit; }
ul, ol { list-style: none; }
.container { width: min(1200px, 100%); margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 999px;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  color: #7EB8FF;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.section-desc {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ========== Button ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  min-width: 112px;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  box-shadow: 0 0 20px rgba(59,130,246,0.45), 0 0 40px rgba(34,211,238,0.18);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(59,130,246,0.6), 0 0 50px rgba(34,211,238,0.3);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}
.btn-ghost {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  color: var(--text-primary);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-2px);
}
.btn-ghost:focus-visible {
  outline: 2px solid rgba(255,255,255,0.5);
  outline-offset: 3px;
}
.btn-accent {
  background: linear-gradient(135deg, #F59E0B, #FBBF24);
  color: #0A0E17;
  box-shadow: 0 0 20px rgba(245,158,11,0.4), 0 0 40px rgba(251,191,36,0.15);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(245,158,11,0.5), 0 0 50px rgba(251,191,36,0.25);
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: 64px;
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.scrolled {
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(255,255,255,0.06);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
.nav-wrap {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.nav-left {
  display: flex;
  align-items: center;
  gap: 36px;
  flex: 1;
  min-width: 0;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}
.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 14px rgba(59,130,246,0.4);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  transition: width 0.25s ease;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active {
  color: var(--accent-blue);
}
.nav-links a.active::after { width: 100%; }
.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  width: 200px;
  height: 38px;
  padding: 0 6px 0 14px;
  border-radius: 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.search-box:focus-within {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.search-box input {
  flex: 1;
  min-width: 0;
  background: transparent;
  font-size: 0.82rem;
  color: var(--text-primary);
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box button {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}
.search-box button:hover { color: var(--text-primary); background: rgba(255,255,255,0.08); }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-primary);
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
}
.nav-toggle:hover { background: rgba(255,255,255,0.10); }

/* ========== Article Header ========== */
.article-header {
  padding: 168px 0 60px;
  background:
    radial-gradient(ellipse at 18% 18%, rgba(59,130,246,0.16), transparent 55%),
    radial-gradient(ellipse at 82% 70%, rgba(34,211,238,0.10), transparent 50%),
    linear-gradient(135deg, rgba(10,14,23,0.96), rgba(16,26,45,0.88)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}
.article-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.article-header .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb-sep { color: var(--text-muted); }
.breadcrumb-current {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-muted);
}
.article-title-wrap { max-width: 860px; }
.article-title-wrap h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item:first-child {
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.25);
  color: #7EB8FF;
  font-size: 0.78rem;
  font-weight: 600;
}
.meta-divider {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

/* ========== Article Content ========== */
.article-section { padding: 72px 0; }
.article-content-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.article-body {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-secondary);
}
.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.4em 0 0.9em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.9em 0 0.7em;
  line-height: 1.4;
}
.article-body p {
  margin-bottom: 1.5em;
  text-align: justify;
}
.article-body p:last-child { margin-bottom: 0; }
.article-body img {
  border-radius: var(--radius-md);
  margin: 1.8em 0;
  box-shadow: var(--shadow-card);
}
.article-body figure {
  margin: 1.8em 0;
}
.article-body figcaption {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}
.article-body blockquote {
  border-left: 3px solid var(--accent-blue);
  background: rgba(59,130,246,0.08);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.8em 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-body blockquote p { margin-bottom: 0; text-align: left; }
.article-body ul,
.article-body ol {
  margin: 1.4em 0 1.6em;
  padding-left: 1.4em;
  color: var(--text-secondary);
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
  margin-bottom: 0.5em;
  padding-left: 0.2em;
}
.article-body a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}
.article-body a:hover { color: #67E8F9; }
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 0.9rem;
}
.article-body th,
.article-body td {
  border: 1px solid rgba(255,255,255,0.1);
  padding: 10px 14px;
  text-align: left;
}
.article-body th {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  font-weight: 600;
}
.article-empty {
  text-align: center;
  padding: 72px 24px;
  border: 1px dashed rgba(255,255,255,0.14);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.02);
}
.article-empty p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
}

/* ========== Tags ========== */
.tags-section { padding: 0 0 72px; }
.tags-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.07);
}
.tags-inner > span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag {
  display: inline-block;
  padding: 5px 15px;
  border-radius: 999px;
  background: rgba(59,130,246,0.10);
  border: 1px solid rgba(59,130,246,0.2);
  color: #7EB8FF;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s;
}
.tag:hover {
  background: rgba(59,130,246,0.18);
  border-color: rgba(59,130,246,0.35);
}

/* ========== Related ========== */
.related-section {
  background: var(--bg-alt);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59,130,246,0.4);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}
.related-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}
.related-card-info {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.related-cat {
  align-self: flex-start;
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.22);
  color: #67E8F9;
  font-size: 0.7rem;
  font-weight: 600;
}
.related-card-info h3 {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}
.related-card-info p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: auto;
}
.related-card-info .link-more {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}
.related-card-info .link-more:hover { gap: 8px; }

/* ========== CTA ========== */
.cta-section { padding: 72px 0 96px; }
.cta-box {
  max-width: 720px;
  margin: 0 auto;
  padding: 52px 44px;
  border-radius: 20px;
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 0%, rgba(34,211,238,0.14), transparent 50%),
    radial-gradient(circle at 15% 100%, rgba(59,130,246,0.16), transparent 50%);
  pointer-events: none;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.cta-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin: 14px auto 28px;
  max-width: 440px;
  line-height: 1.7;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.site-footer {
  background: #070B12;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 44px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 280px;
  line-height: 1.7;
}
.footer-col h5 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 0.84rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.footer-col ul a:hover { color: var(--accent-blue); }
.footer-sub {
  display: flex;
  gap: 8px;
}
.footer-sub input {
  flex: 1;
  min-width: 0;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  color: var(--text-primary);
  font-size: 0.84rem;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.footer-sub input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.footer-sub button {
  height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #F59E0B, #FBBF24);
  color: #0A0E17;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.2s;
  flex-shrink: 0;
}
.footer-sub button:hover { filter: brightness(1.1); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 8px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .nav-links { gap: 18px; }
  .search-box { width: 170px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .nav-left { gap: 16px; }
  .search-box { display: none; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: rgba(10,14,23,0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    z-index: 40;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a {
    padding: 12px 8px;
    font-size: 0.95rem;
    border-radius: 8px;
  }
  .nav-links a:hover { background: rgba(255,255,255,0.06); }
  .nav-links a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .article-header { padding: 130px 0 44px; }
  .article-title-wrap h1 { font-size: 1.7rem; }
  .article-section { padding: 48px 0; }
  .tags-section { padding: 0 0 48px; }
  .cta-section { padding: 56px 0 72px; }
  .cta-box { padding: 40px 24px; }
  .cta-title { font-size: 1.3rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
  .related-grid { grid-template-columns: 1fr; }
  .container { padding: 0 20px; }
  .nav-wrap { padding: 0 20px; }
  .article-title-wrap h1 { font-size: 1.45rem; }
  .article-meta { gap: 10px; }
  .btn { min-width: 96px; padding: 0 18px; }
  .cta-buttons .btn { width: 100%; }
  .footer-sub { flex-direction: column; }
  .footer-sub button { width: 100%; }
}

@media (max-width: 520px) {
  .nav-wrap { gap: 10px; }
  .logo { font-size: 0.95rem; }
  .logo-mark { width: 28px; height: 28px; font-size: 0.85rem; }
  .nav-right .btn-primary {
    display: none;
  }
  .article-header { padding: 120px 0 36px; }
  .breadcrumb { font-size: 0.76rem; margin-bottom: 20px; }
  .article-title-wrap h1 { font-size: 1.3rem; }
  .article-body { font-size: 0.95rem; }
  .article-body h2 { font-size: 1.25rem; }
  .article-body h3 { font-size: 1.05rem; }
}

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #101A2D;
            --bg-alt: #0D1424;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.12);
            --accent-blue: #3B82F6;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --font-family: '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-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1000;
            width: 100%;
            height: 64px;
            background: transparent;
            border-bottom: 1px solid transparent;
            transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .nav-wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.1rem;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            gap: 28px;
        }

        .nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 2px;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: var(--text-primary);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 0 8px 0 14px;
            height: 38px;
            width: 210px;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .search-box:focus-within {
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }

        .search-box input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 0.85rem;
            height: 100%;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: background 0.2s, color 0.2s;
        }

        .search-box button:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: var(--text-primary);
            cursor: pointer;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* ===== 页面头部 ===== */
        .page-hero {
            position: relative;
            min-height: 260px;
            display: flex;
            align-items: center;
            padding: 120px 0 60px;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.94) 0%, rgba(16, 26, 45, 0.88) 50%, rgba(10, 14, 23, 0.76) 100%);
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.22) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .page-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.2;
            margin-bottom: 12px;
        }

        .page-hero h1 span {
            color: var(--accent-cyan);
        }

        .page-hero p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }

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

        .breadcrumb .sep {
            opacity: 0.5;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 96px 0;
        }

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

        .section-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 48px;
        }

        .section-num {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-blue);
            letter-spacing: 0.08em;
            border: 1px solid rgba(59, 130, 246, 0.35);
            border-radius: 8px;
            padding: 4px 12px;
            background: rgba(59, 130, 246, 0.08);
            white-space: nowrap;
        }

        .section-header h2 {
            font-size: clamp(1.4rem, 2.4vw, 1.9rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

        .section-sub {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 640px;
            margin-top: -32px;
            margin-bottom: 40px;
        }

        .section-sub + .grid,
        .section-sub + .cards-grid {
            margin-top: 0;
        }

        /* ===== 卡片 ===== */
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
        }

        .glass-card:hover {
            border-color: rgba(59, 130, 246, 0.4);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
            transform: translateY(-2px);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            height: 44px;
            min-width: 112px;
            padding: 0 24px;
            font-size: 0.92rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.35), 0 0 40px rgba(34, 211, 238, 0.12);
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.5), 0 0 60px rgba(34, 211, 238, 0.2);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text-primary);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-accent {
            background: linear-gradient(135deg, #F59E0B, #F97316);
            color: #fff;
            box-shadow: 0 0 24px rgba(245, 158, 11, 0.35);
        }

        .btn-accent:hover {
            filter: brightness(1.08);
            box-shadow: 0 0 36px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }

        /* ===== 简介区 ===== */
        .intro-wrap {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .intro-text p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 16px;
            text-align: justify;
        }

        .intro-text p:last-child {
            margin-bottom: 0;
        }

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

        .stat-card {
            text-align: center;
            padding: 28px 16px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 卖点卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            padding: 36px 28px;
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
            pointer-events: none;
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(34, 211, 238, 0.15));
            border: 1px solid rgba(59, 130, 246, 0.25);
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 场景卡片 ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .scenario-card {
            display: flex;
            gap: 20px;
            padding: 28px;
            align-items: flex-start;
        }

        .scenario-index {
            font-size: 1.4rem;
            font-weight: 800;
            color: rgba(59, 130, 246, 0.5);
            line-height: 1.2;
            min-width: 36px;
        }

        .scenario-info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .scenario-info p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 流程 ===== */
        .process-wrap {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-wrap::before {
            content: '';
            position: absolute;
            top: 30px;
            left: 60px;
            right: 60px;
            height: 2px;
            background: linear-gradient(90deg, rgba(59, 130, 246, 0.5), rgba(34, 211, 238, 0.5));
            opacity: 0.4;
            z-index: 0;
        }

        .process-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }

        .process-dot {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 16px;
            box-shadow: 0 0 24px rgba(59, 130, 246, 0.4);
        }

        .process-item h3 {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 服务详情列表 ===== */
        .service-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .service-item {
            display: flex;
            gap: 24px;
            padding: 24px 28px;
            align-items: center;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
        }

        .service-item:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(59, 130, 246, 0.3);
            transform: translateX(4px);
        }

        .service-img {
            width: 120px;
            height: 84px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .service-body {
            flex: 1;
        }

        .service-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .service-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .service-badge {
            flex-shrink: 0;
            font-size: 0.75rem;
            border-radius: 999px;
            padding: 4px 14px;
            background: rgba(59, 130, 246, 0.12);
            color: rgba(59, 130, 246, 0.9);
            border: 1px solid rgba(59, 130, 246, 0.2);
            white-space: nowrap;
        }

        /* ===== 延伸阅读 ===== */
        .related-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
            cursor: pointer;
        }

        .related-card:hover {
            border-color: rgba(59, 130, 246, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
        }

        .related-img {
            height: 130px;
            object-fit: cover;
            width: 100%;
        }

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

        .related-body h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .related-body p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border-radius: var(--radius-md);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }

        .faq-item.open {
            border-color: rgba(59, 130, 246, 0.4);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
        }

        .faq-question h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            flex: 1;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-secondary);
            transition: transform 0.3s;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-cyan);
            border-color: rgba(34, 211, 238, 0.4);
        }

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

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-box {
            position: relative;
            max-width: 640px;
            margin: 0 auto;
            text-align: center;
            padding: 56px 48px;
            border-radius: 24px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -30px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.22), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(1.3rem, 2.2vw, 1.8rem);
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 32px;
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070B12;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 80px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 56px;
        }

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

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

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

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

        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: color 0.2s;
        }

        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }

        .footer-sub {
            display: flex;
            gap: 8px;
        }

        .footer-sub input {
            flex: 1;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 0 14px;
            color: var(--text-primary);
            font-size: 0.85rem;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .footer-sub input:focus {
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }

        .footer-sub button {
            height: 40px;
            border-radius: 10px;
            padding: 0 18px;
            background: linear-gradient(135deg, var(--accent-amber), #F97316);
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            transition: filter 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .footer-sub button:hover {
            filter: brightness(1.08);
            transform: translateY(-1px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* ===== 移动端导航 ===== */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 14, 23, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: none;
            opacity: 0;
            transition: opacity 0.3s;
            padding: 80px 32px 32px;
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: block;
            opacity: 1;
        }

        .mobile-menu a {
            display: block;
            padding: 16px 0;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-menu a.active {
            color: var(--accent-cyan);
        }

        .mobile-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            cursor: pointer;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-wrap {
                grid-template-columns: repeat(3, 1fr);
                row-gap: 40px;
            }

            .process-wrap::before {
                display: none;
            }

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

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

            .nav-links {
                gap: 16px;
            }

            .search-box {
                width: 170px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .site-header .nav-links {
                display: none;
            }

            .search-box {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                min-height: 220px;
                padding: 100px 0 48px;
            }

            .page-hero h1 {
                font-size: 1.7rem;
            }

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

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

            .process-wrap {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .service-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .service-img {
                width: 100%;
                height: 160px;
            }

            .service-badge {
                align-self: flex-start;
            }

            .cta-box {
                padding: 40px 24px;
            }

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

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

            .nav-wrap {
                padding: 0 16px;
            }

            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 480px) {
            .process-wrap {
                grid-template-columns: 1fr;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                margin-bottom: 32px;
            }

            .section-sub {
                margin-top: 0;
            }

            .intro-stats {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .cta-btns {
                flex-direction: column;
                width: 100%;
            }

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

/* roulang page: category2 */
:root {
  --bg-primary: #0A0E17;
  --bg-secondary: #101A2D;
  --bg-alt: #0D1424;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --color-primary: #3B82F6;
  --color-secondary: #22D3EE;
  --color-accent: #F59E0B;
  --text-main: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.45), 0 0 40px rgba(34, 211, 238, 0.18);
  --shadow-glow-amber: 0 0 20px rgba(245, 158, 11, 0.4), 0 0 40px rgba(245, 158, 11, 0.15);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --space-section: 96px;
  --space-section-mobile: 56px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease;
}

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

button, input {
  font-family: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

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

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

.section-head {
  margin-bottom: 40px;
}

.section-head .sec-label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-head .sec-label::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
  color: var(--text-main);
}

.section-head p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 10px 0 0;
  max-width: 640px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-wrap {
  max-width: 1200px;
  margin: 0 auto;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-main);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active {
  color: #fff;
  font-weight: 600;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-box {
  display: flex;
  align-items: center;
  width: 200px;
  height: 38px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  gap: 8px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.search-box:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.search-box input {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text-main);
  background: transparent;
  width: 100%;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box button {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.25s ease;
}

.search-box button:hover {
  color: var(--color-secondary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  transition: background 0.25s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(10, 14, 23, 0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px;
  display: none;
  flex-direction: column;
  gap: 6px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
}

.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
}

.mobile-menu a.active {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.08);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 112px;
  height: 42px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 28px rgba(59, 130, 246, 0.6), 0 0 50px rgba(34, 211, 238, 0.25);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-main);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, #F59E0B, #FBBF24);
  color: #0A0E17;
  box-shadow: var(--shadow-glow-amber);
}

.btn-accent:hover {
  filter: brightness(1.08);
  box-shadow: 0 0 30px rgba(245, 158, 11, 0.55), 0 0 50px rgba(245, 158, 11, 0.25);
  transform: translateY(-2px);
}

/* ---------- Page Hero (category banner) ---------- */
.page-hero {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  padding: 140px 0 70px;
  background:
    linear-gradient(180deg, rgba(10, 14, 23, 0.15) 0%, rgba(10, 14, 23, 0.55) 50%, rgba(10, 14, 23, 0.92) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -10%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.16) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}

.page-hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

.page-hero .hero-breadcrumb {
  margin-bottom: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-hero .hero-breadcrumb a {
  color: var(--color-secondary);
}

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

.page-hero .hero-breadcrumb span {
  margin: 0 8px;
  color: var(--text-muted);
}

/* ---------- Category intro ---------- */
.category-intro {
  background: var(--bg-alt);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.intro-text p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.85;
  margin: 0 0 18px;
  text-align: justify;
}

.intro-text p:last-child {
  margin-bottom: 0;
}

.intro-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.stat-card .stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ---------- Tutorial Section ---------- */
.tutorial-section {
  background: var(--bg-primary);
}

.tutorial-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.tutorial-card {
  display: grid;
  grid-template-columns: 40% 60%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.tutorial-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  transform: translateY(-3px);
}

.tutorial-card.card-reverse {
  direction: rtl;
}

.tutorial-card.card-reverse > * {
  direction: ltr;
}

.tutorial-card .tutorial-img {
  position: relative;
  min-height: 220px;
  overflow: hidden;
}

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

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

.tutorial-card .tutorial-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 23, 0), rgba(10, 14, 23, 0.25));
}

.tutorial-card .tutorial-img .tutorial-no {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-secondary);
}

.tutorial-card .tutorial-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tutorial-card .tutorial-body .badge {
  align-self: flex-start;
  background: rgba(59, 130, 246, 0.12);
  color: #60A5FA;
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.tutorial-card .tutorial-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--text-main);
  line-height: 1.4;
}

.tutorial-card .tutorial-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 20px;
  text-align: justify;
}

.tutorial-card .tutorial-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-secondary);
  transition: gap 0.25s ease;
}

.tutorial-card .tutorial-more:hover {
  gap: 12px;
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--bg-alt);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.faq-list {
  max-width: 768px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item.active {
  border-color: rgba(59, 130, 246, 0.35);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.03);
}

.faq-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-primary);
  transition: transform 0.35s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(59, 130, 246, 0.2);
}

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

.faq-item.active .faq-answer {
  padding: 0 24px 22px;
  max-height: 300px;
}

.faq-answer p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

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

.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.process-step {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px 24px 28px;
  text-align: center;
  transition: all var(--transition);
}

.process-step:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.process-step::before {
  content: attr(data-step);
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 14px rgba(59, 130, 246, 0.45);
}

.process-step .step-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
  display: block;
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text-main);
}

.process-step p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
  text-align: justify;
}

/* ---------- Related ---------- */
.related-section {
  background: var(--bg-alt);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

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

.related-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.related-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  transform: translateY(-4px);
}

.related-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

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

.related-card .related-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-main);
}

.related-card .related-body p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0 0 14px;
  text-align: justify;
}

.related-card .related-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-secondary);
  transition: gap 0.25s ease;
}

.related-card .related-link:hover {
  gap: 12px;
}

/* ---------- CTA ---------- */
.cta-bar {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-top: 40px;
}

.cta-bar::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.1), transparent 70%);
  border-radius: 50%;
}

.cta-bar::after {
  content: "";
  position: absolute;
  bottom: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12), transparent 70%);
  border-radius: 50%;
}

.cta-bar h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 10px;
  position: relative;
  z-index: 2;
}

.cta-bar p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0 0 24px;
  position: relative;
  z-index: 2;
}

.cta-bar .btn-group {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #070B12;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 0.8fr 1.1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  margin: 14px 0 0;
  line-height: 1.7;
  text-align: justify;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 16px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

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

.footer-sub {
  display: flex;
  gap: 8px;
}

.footer-sub input {
  flex: 1;
  height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 0.85rem;
  color: var(--text-main);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.footer-sub input::placeholder {
  color: var(--text-muted);
}

.footer-sub input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.footer-sub button {
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent), #FBBF24);
  color: #0A0E17;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}

.footer-sub button:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.4);
}

.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .search-box {
    width: 170px;
  }

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

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

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

  .tutorial-card {
    grid-template-columns: 38% 62%;
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-section-mobile) 0;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .nav-wrap {
    padding: 0 16px;
  }

  .nav-right .btn {
    display: none;
  }

  .search-box {
    width: 44px;
    padding: 0;
    justify-content: center;
    border-color: transparent;
  }

  .search-box input {
    display: none;
  }

  .search-box button {
    display: flex;
  }

  .page-hero {
    padding: 110px 0 48px;
    min-height: 240px;
  }

  .page-hero h1 {
    font-size: 1.6rem;
  }

  .tutorial-card {
    grid-template-columns: 1fr;
  }

  .tutorial-card .tutorial-img {
    min-height: 180px;
  }

  .tutorial-card .tutorial-body {
    padding: 22px 20px;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .cta-bar {
    padding: 32px 20px;
  }

  .cta-bar .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .cta-bar .btn-group .btn {
    width: 100%;
  }

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

@media (max-width: 520px) {
  .nav-wrap {
    gap: 10px;
  }

  .logo {
    font-size: 1rem;
  }

  .logo-mark {
    width: 30px;
    height: 30px;
  }

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

  .tutorial-card .tutorial-img {
    min-height: 160px;
  }
}