/* roulang page: index */
:root {
  --bg-primary: #060A17;
  --surface: rgba(15, 22, 41, 0.66);
  --surface-solid: #0F1629;
  --accent: #22D3EE;
  --accent-hover: #38BDF8;
  --accent-blue: #3B82F6;
  --gold: #F2B84D;
  --text-primary: #EDF2F7;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #0A0F1E;
  --border-glass: rgba(255, 255, 255, 0.09);
  --border-soft: rgba(255, 255, 255, 0.06);
  --radius-card: 16px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
  --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 18px rgba(59, 130, 246, 0.3);
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  background-image: radial-gradient(ellipse at 20% -10%, rgba(59, 130, 246, 0.12) 0%, transparent 55%);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
section[id] { scroll-margin-top: 88px; }
.gold-text { color: var(--gold); }
.cyan-text { color: var(--accent); }

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-blue));
  color: var(--text-inverse);
  font-weight: 700;
  font-size: 14px;
  border: none;
  line-height: 1;
  box-shadow: var(--shadow-glow);
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.5), 0 6px 24px rgba(59, 130, 246, 0.4);
  background: linear-gradient(135deg, var(--accent-hover), var(--accent-blue));
}
.btn-primary:active {
  transform: translateY(-1px) translateY(1px) scale(0.98);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.25), 0 0 18px rgba(34, 211, 238, 0.3);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}
.btn-ghost:active {
  transform: scale(0.98);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}
.btn-sm { height: 38px; padding: 0 20px; font-size: 13px; }
.btn-lg { height: 56px; padding: 0 38px; font-size: 16px; border-radius: 12px; }
.btn-download-main { width: 320px; height: 56px; font-size: 17px; border-radius: 14px; }
.btn-disabled { opacity: 0.4; pointer-events: none; }

/* 顶部信息条 */
.topbar {
  height: 36px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-soft);
  position: relative;
  z-index: 60;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 32px;
  max-width: 1200px;
  margin: 0 auto;
}
.topbar-left { display: flex; align-items: center; gap: 8px; }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.7);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(34, 211, 238, 0.7); }
  50% { opacity: 0.5; box-shadow: 0 0 4px rgba(34, 211, 238, 0.3); }
}
.topbar-domain { font-size: 13px; color: var(--text-secondary); font-feature-settings: "tnum"; }
.topbar-right { display: flex; }
.topbar-action {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 0.2s;
  position: relative;
}
.topbar-action:hover { color: var(--accent); }
.topbar-action::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.2s;
}
.topbar-action:hover::after { width: 100%; }

/* 主导航 */
.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 10, 23, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.main-header.scrolled {
  background: rgba(6, 10, 23, 0.9);
  box-shadow: 0 8px 32px rgba(2, 6, 23, 0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  position: relative;
  width: 36px; height: 36px;
  border: 2px solid var(--accent);
  border-radius: 9px;
  display: block;
  flex-shrink: 0;
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.25);
}
.brand-mark::after {
  content: '';
  position: absolute;
  width: 10px; height: 10px;
  background: var(--gold);
  border-radius: 3px;
  right: 3px; top: 3px;
}
.brand-text { font-size: 18px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.01em; line-height: 1.2; }
.main-nav { display: flex; align-items: center; gap: 34px; }
.nav-link {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 0;
  position: relative;
  transition: color 0.25s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 24px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-blue));
}
.header-actions { display: flex; align-items: center; gap: 12px; }

/* 汉堡 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 0 10px;
  transition: border-color 0.2s;
}
.hamburger:hover { border-color: var(--accent); }
.hamburger span { display: block; height: 2px; border-radius: 2px; background: var(--text-primary); transition: all 0.3s; }

/* 移动端抽屉 */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }
.mobile-drawer {
  position: fixed;
  top: 0; right: 0;
  width: 100%;
  max-width: 360px;
  height: 100vh;
  background: rgba(6, 10, 23, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 99;
  padding: 32px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s ease;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-close {
  align-self: flex-end;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  width: 40px; height: 40px;
  border-radius: 10px;
  transition: all 0.2s;
}
.drawer-close:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.06); }
.drawer-link {
  font-size: 20px;
  line-height: 48px;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color 0.2s, padding-left 0.2s;
}
.drawer-link:hover { color: var(--accent); padding-left: 6px; }
.btn-drawer { margin-top: 36px; width: 100%; }

/* 区块 */
.section-pad { padding: 80px 0; }
.section-collapse { padding: 20px 0; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
  margin: 0;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 26px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-blue));
}
.section-desc { color: var(--text-secondary); font-size: 15px; margin-top: 12px; }

/* Hero */
.hero {
  position: relative;
  min-height: 680px;
  height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 40%;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  z-index: 1;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  z-index: 1;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, #000 0%, transparent 75%);
}
.hero-glow {
  position: absolute;
  width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.13) 0%, transparent 65%);
  top: -160px; right: -120px;
  z-index: 1;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
  padding-top: 40px;
  padding-bottom: 40px;
}
.hero-content { flex: 1.15; max-width: 620px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 30px;
  background: rgba(15, 22, 41, 0.7);
  border: 1px solid rgba(242, 184, 77, 0.35);
  color: var(--gold);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 0 0 20px 0;
}
.hero-title .gold-text { position: relative; }
.hero-title .gold-text::after {
  content: '';
  position: absolute;
  left: 0; bottom: 4px;
  width: 100%; height: 8px;
  background: rgba(242, 184, 77, 0.18);
  border-radius: 4px;
  z-index: -1;
}
.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 32px 0;
  max-width: 480px;
}
.hero-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.stat-item { display: flex; flex-direction: column; gap: 2px; }
.stat-value { font-size: 22px; font-weight: 700; color: var(--text-primary); font-feature-settings: "tnum"; }
.stat-label { font-size: 13px; color: var(--text-muted); }
.stat-divider { width: 1px; height: 36px; background: rgba(255, 255, 255, 0.1); }
.hero-visual { flex: 1; position: relative; max-width: 520px; }
.hero-mockup {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 70px rgba(2, 6, 23, 0.65);
  background: rgba(15, 22, 41, 0.55);
  backdrop-filter: blur(10px);
  padding: 14px;
  transform: perspective(1200px) rotateY(-6deg);
  transition: transform 0.4s ease;
}
.hero-mockup:hover { transform: perspective(1200px) rotateY(-2deg); }
.mockup-img { width: 100%; border-radius: 14px; display: block; }
.hero-mockup::before {
  content: '';
  position: absolute;
  width: 340px; height: 340px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.22), transparent 70%);
  bottom: -80px; left: -60px;
  z-index: -1;
  filter: blur(24px);
  pointer-events: none;
}
.hero-seal {
  position: absolute;
  top: 0;
  right: -6px;
  width: 90px; height: 90px;
  z-index: 3;
}
.seal-circle {
  width: 100%; height: 100%;
  border: 2px solid rgba(242, 184, 77, 0.55);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--gold);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  box-shadow: 0 0 24px rgba(242, 184, 77, 0.15);
  background: rgba(6, 10, 23, 0.75);
  backdrop-filter: blur(8px);
  transform: rotate(-8deg);
}
.seal-text { position: relative; }

/* 价值横条 */
.values-strip {
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  padding: 18px 0;
  background: rgba(0, 0, 0, 0.25);
  overflow: hidden;
}
.values-track {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.values-track::-webkit-scrollbar { display: none; }
.value-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  white-space: nowrap;
  padding: 6px 10px;
  transition: color 0.2s;
}
.value-item:hover { color: var(--text-primary); }
.value-icon { color: var(--accent); font-size: 16px; width: 22px; text-align: center; }

/* 功能亮点 */
.features-section { padding: 80px 0; position: relative; }
.carousel-wrapper { position: relative; margin-top: 40px; }
.carousel-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 8px 4px 28px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}
.carousel-track::-webkit-scrollbar { display: none; }
.feature-card {
  flex: 0 0 260px;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  scroll-snap-align: start;
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 18px 50px rgba(2, 6, 23, 0.55), 0 0 20px rgba(34, 211, 238, 0.12);
}
.feature-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--surface-solid);
}
.feature-thumb img { width: 100%; height: 100%; object-fit: cover; }
.feature-icon {
  position: absolute;
  right: 10px; bottom: 10px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(6, 10, 23, 0.85);
  border: 1px solid rgba(34, 211, 238, 0.5);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  backdrop-filter: blur(8px);
}
.feature-card h3 { font-size: 17px; font-weight: 600; color: var(--text-primary); margin: 0 0 6px 0; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(6, 10, 23, 0.75);
  color: var(--text-primary);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  backdrop-filter: blur(10px);
  transition: all 0.25s;
}
.carousel-arrow:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 16px rgba(34, 211, 238, 0.2); }
.carousel-arrow.left { left: -14px; }
.carousel-arrow.right { right: -14px; }
.carousel-dots { display: flex; justify-content: center; gap: 6px; margin-top: 8px; }
.carousel-dot { width: 8px; height: 8px; border-radius: 4px; background: rgba(255, 255, 255, 0.2); transition: all 0.25s; }
.carousel-dot.active { background: var(--accent); width: 24px; }
.carousel-dot:hover { background: rgba(34, 211, 238, 0.5); }

/* 系统要求 */
.requirements { padding: 80px 0; }
.req-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.req-text p { color: var(--text-secondary); font-size: 15px; line-height: 1.8; margin: 16px 0 20px; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  transition: gap 0.2s, color 0.2s;
}
.text-link:hover { gap: 10px; color: var(--accent-hover); }
.req-lists { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; }
.req-col-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.req-col-title i { color: var(--accent); font-size: 16px; }
.req-row {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.2s;
  padding: 0 6px;
}
.req-row:last-child { border-bottom: none; }
.req-row:hover { background: rgba(255, 255, 255, 0.025); }
.req-icon { color: var(--text-muted); font-size: 16px; width: 22px; text-align: center; transition: all 0.2s; }
.req-row:hover .req-icon { color: var(--accent); text-shadow: 0 0 12px rgba(34, 211, 238, 0.5); }
.req-name { color: var(--text-secondary); font-size: 14px; flex-shrink: 0; }
.req-value { margin-left: auto; color: var(--text-secondary); font-size: 14px; text-align: right; font-feature-settings: "tnum"; }

/* 评价墙 */
.testimonials { position: relative; padding: 80px 0; }
.testimonials-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center 60%;
  z-index: 0;
}
.testimonials-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
}
.testimonials .container { position: relative; z-index: 1; }
.rating-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 52px;
}
.rating-score { font-size: 54px; font-weight: 800; color: var(--text-primary); line-height: 1; font-feature-settings: "tnum"; }
.rating-stars { color: var(--gold); font-size: 22px; letter-spacing: 8px; }
.rating-count { color: var(--text-secondary); font-size: 14px; }
.testimonial-grid { columns: 3; column-gap: 24px; }
.testimonial-card {
  break-inside: avoid;
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s, border-color 0.3s;
}
.testimonial-card:hover { transform: translateY(-4px); border-color: rgba(34, 211, 238, 0.3); }
.t-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}
.avatar-cyan { background: linear-gradient(135deg, #22D3EE, #3B82F6); }
.avatar-gold { background: linear-gradient(135deg, #F2B84D, #F97316); }
.avatar-blue { background: linear-gradient(135deg, #3B82F6, #8B5CF6); }
.avatar-green { background: linear-gradient(135deg, #10B981, #22D3EE); }
.t-name { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.t-stars { color: var(--gold); font-size: 12px; letter-spacing: 2px; margin-top: 2px; }
.t-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin: 0 0 12px 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.t-time { font-size: 13px; color: var(--text-muted); font-feature-settings: "tnum"; }

/* 下载区域 */
.download-section { padding: 80px 0; text-align: center; position: relative; }
.download-section::before {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.14), transparent 65%);
  top: -180px; left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}
.download-section .container { position: relative; z-index: 1; }
.download-desc { color: var(--text-secondary); font-size: 15px; margin: 16px 0 40px; text-align: center; }
.download-main-group { display: flex; justify-content: center; margin-bottom: 28px; }
.platform-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 32px; }
.platform-btn {
  min-width: 120px;
  height: 42px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  background: rgba(15, 22, 41, 0.4);
  transition: all 0.25s;
}
.platform-btn:hover { border-color: var(--accent); color: var(--text-primary); background: rgba(34, 211, 238, 0.05); box-shadow: 0 0 16px rgba(34, 211, 238, 0.12); }
.platform-btn i { font-size: 15px; }
.download-info { color: var(--text-muted); font-size: 13px; display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; font-feature-settings: "tnum"; }
.download-info .sep { opacity: 0.6; }

/* 最新动态 */
.news-section { padding: 80px 0; background: rgba(0, 0, 0, 0.15); }
.news-list { max-width: 860px; margin: 48px auto 0; display: flex; flex-direction: column; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  transition: all 0.3s;
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: rgba(255, 255, 255, 0.025); padding-left: 18px; padding-right: 6px; }
.news-thumb {
  flex: 0 0 96px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface-solid);
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-content { flex: 1; min-width: 0; }
.news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s;
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-title:hover { color: var(--accent); }
.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 6px 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta { display: flex; align-items: center; gap: 14px; margin-top: 10px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
}
.badge-cyan { background: rgba(34, 211, 238, 0.1); color: var(--accent); border: 1px solid rgba(34, 211, 238, 0.25); }
.badge-gold { background: rgba(242, 184, 77, 0.1); color: var(--gold); border: 1px solid rgba(242, 184, 77, 0.25); }
.news-time { color: var(--text-muted); font-size: 13px; font-feature-settings: "tnum"; }
.news-time i { margin-right: 4px; font-size: 12px; }
.news-empty {
  padding: 56px 24px;
  text-align: center;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  color: var(--text-secondary);
}
.news-empty-icon { font-size: 34px; margin-bottom: 12px; color: var(--text-muted); }
.news-empty p { margin: 0; font-size: 15px; }

/* 页脚 */
.footer {
  background: #04070F;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-desc { color: var(--text-secondary); font-size: 14px; line-height: 1.7; max-width: 260px; margin: 0; }
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-col a, .footer-col p {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 4px 0;
  margin: 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }
.footer-col .footer-contact { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); font-size: 14px; padding: 4px 0; }
.footer-col .footer-contact i { color: var(--accent); font-size: 13px; width: 18px; text-align: center; }
.footer-col .footer-contact a { display: inline; padding: 0; color: var(--text-secondary); }
.footer-col .footer-contact a:hover { color: var(--accent); }
.footer-copyright {
  text-align: center;
  padding-top: 28px;
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 13px;
  font-feature-settings: "tnum";
}

/* 响应式 */
@media (max-width: 1024px) {
  .container, .header-inner, .topbar-inner { padding-left: 24px; padding-right: 24px; }
  .hero-inner { gap: 32px; }
  .carousel-arrow.left { left: -6px; }
  .carousel-arrow.right { right: -6px; }
  .req-layout { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 859px) {
  .main-nav { gap: 20px; }
  .header-actions .btn-ghost { display: none; }
}
@media (max-width: 768px) {
  .container, .header-inner, .topbar-inner { padding-left: 16px; padding-right: 16px; }
  .main-nav { display: none; }
  .header-actions { display: none; }
  .hamburger { display: flex; }
  .header-inner { height: 64px; }
  .brand-text { font-size: 16px; }
  .hero { height: auto; min-height: 680px; padding: 70px 0 60px; }
  .hero-inner { flex-direction: column; padding-top: 20px; gap: 40px; }
  .hero-content { max-width: 100%; }
  .hero-visual { max-width: 420px; width: 100%; }
  .hero-stats { gap: 18px; margin-top: 28px; padding-top: 22px; }
  .stat-value { font-size: 19px; }
  .values-track { justify-content: flex-start; }
  .features-section, .requirements, .testimonials, .download-section, .news-section { padding: 60px 0; }
  .carousel-track { gap: 16px; }
  .feature-card { flex: 0 0 230px; }
  .req-layout { grid-template-columns: 1fr; gap: 40px; }
  .req-lists { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .testimonial-grid { columns: 1; }
  .btn-download-main { width: 82%; max-width: 320px; }
  .platform-buttons { display: grid; grid-template-columns: repeat(2, 1fr); max-width: 320px; margin-left: auto; margin-right: auto; }
  .platform-btn { width: 100%; min-width: 0; }
  .news-item { flex-direction: column; gap: 12px; padding: 20px 8px; }
  .news-thumb { flex: 0 0 auto; width: 100%; height: auto; aspect-ratio: 16 / 7; }
  .news-thumb img { object-fit: cover; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-stats { gap: 12px; }
  .stat-divider { display: none; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn-primary, .hero-cta .btn-ghost { width: 100%; }
  .hero-seal { width: 72px; height: 72px; top: 4px; right: -2px; }
  .seal-circle { font-size: 12px; }
  .section-title { font-size: 1.35rem; }
  .download-info { flex-direction: column; gap: 4px; }
  .download-info .sep { display: none; }
}

/* roulang page: category1 */
:root {
  --bg-primary: #060A17;
  --bg-deep: #04070F;
  --bg-surface: rgba(15, 22, 41, 0.66);
  --glass-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  --glass-border: rgba(255, 255, 255, 0.09);
  --accent-cyan: #22D3EE;
  --accent-blue: #3B82F6;
  --accent-gold: #F2B84D;
  --text-primary: #EDF2F7;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
  --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 18px rgba(59, 130, 246, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(ellipse at 15% 10%, rgba(34, 211, 238, 0.08) 0%, transparent 55%);
}

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

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

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

input {
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ===== Top Bar ===== */
.top-bar {
  height: 36px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.top-bar-domain {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34D399;
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.6);
  flex-shrink: 0;
}

.top-bar-action {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 0.2s;
  letter-spacing: 0.5px;
}

.top-bar-action:hover {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ===== Header / Nav ===== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 23, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}

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

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.25), rgba(59, 130, 246, 0.15));
  border: 1px solid rgba(34, 211, 238, 0.3);
  position: relative;
  display: block;
  flex-shrink: 0;
}

.brand-mark::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent-gold);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(242, 184, 77, 0.5);
}

.brand-mark::after {
  content: "";
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 14px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
  opacity: 0.7;
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2px;
  white-space: nowrap;
  color: var(--text-primary);
}

.gold-text {
  color: var(--accent-gold);
}

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

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding-bottom: 6px;
  transition: color 0.25s;
  white-space: nowrap;
}

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

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

.nav-link:hover::after {
  width: 24px;
}

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

.nav-link.active::after {
  width: 24px;
}

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

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.25s;
  background: transparent;
  white-space: nowrap;
}

.btn-ghost:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.btn-ghost:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #0A0F1E;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
  transition: all 0.25s;
  white-space: nowrap;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 26px rgba(34, 211, 238, 0.45), 0 6px 24px rgba(59, 130, 246, 0.35);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.25);
}

.btn-lg {
  height: 56px;
  padding: 0 36px;
  font-size: 16px;
  border-radius: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  z-index: 120;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

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

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

/* Mobile drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6, 10, 23, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 110;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

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

.mobile-drawer-link {
  font-size: 1.25rem;
  color: var(--text-secondary);
  padding: 14px 0;
  line-height: 48px;
  transition: color 0.25s;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  width: 70%;
  text-align: center;
}

.mobile-drawer-link:hover {
  color: var(--accent-cyan);
}

.mobile-drawer-link.active {
  color: var(--text-primary);
}

.mobile-drawer .btn-primary {
  margin-top: 28px;
  width: 70%;
  justify-content: center;
  height: 48px;
}

/* ===== Hero Category ===== */
.hero-category {
  position: relative;
  padding: 70px 0 72px;
  background-image: url(/assets/images/backpic/back-1.webp);
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-category::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 10, 23, 0.72) 0%, rgba(6, 10, 23, 0.85) 60%, var(--bg-primary) 100%);
  pointer-events: none;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 36px;
}

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

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

.breadcrumb-sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.hero-category-content {
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(242, 184, 77, 0.12);
  border: 1px solid rgba(242, 184, 77, 0.25);
  color: var(--accent-gold);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-category h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}

.hero-category h1 .gold-text {
  color: var(--accent-gold);
}

.hero-category-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 560px;
}

/* ===== Alternating Sections ===== */
.alt-section {
  padding: 80px 0;
}

.alt-section.second {
  background: transparent;
}

.alt-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.alt-row:last-child {
  margin-bottom: 0;
}

.alt-row.reverse .alt-media {
  order: 2;
}

.alt-row.reverse .alt-text {
  order: 1;
}

.alt-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
  position: relative;
  background: var(--bg-surface);
}

.alt-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.alt-media:hover img {
  transform: scale(1.02);
}

.alt-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.alt-text {
  padding: 8px 0;
}

.alt-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.alt-kicker i {
  font-size: 12px;
}

.alt-text h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
  position: relative;
  padding-left: 16px;
}

.alt-text h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: calc(100% - 12px);
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
}

.alt-text p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 20px;
}

.alt-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.alt-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.alt-list li:last-child {
  border-bottom: none;
}

.alt-list li i {
  color: var(--accent-cyan);
  font-size: 13px;
  margin-top: 5px;
  flex-shrink: 0;
}

/* ===== CTA Band ===== */
.cta-band {
  position: relative;
  padding: 64px 0;
  background-image: url(/assets/images/backpic/back-2.webp);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(6, 10, 23, 0.82);
  pointer-events: none;
}

.cta-band .container {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-band-text {
  max-width: 620px;
}

.cta-band-text h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  margin-bottom: 10px;
}

.cta-band-text p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.cta-band .btn-primary {
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
}

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

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  position: relative;
  display: inline-block;
  padding-left: 16px;
  margin-bottom: 12px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 68%;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--glass-gradient);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item:hover {
  border-color: rgba(34, 211, 238, 0.25);
}

.faq-item.open {
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 8px 30px rgba(2, 6, 23, 0.35);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  transition: color 0.25s;
  cursor: pointer;
}

.faq-q-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(242, 184, 77, 0.15);
  border: 1px solid rgba(242, 184, 77, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-gold);
  flex-shrink: 0;
}

.faq-question-text {
  flex: 1;
}

.faq-toggle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform 0.3s, color 0.3s, border-color 0.3s;
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

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

.faq-answer-inner {
  padding: 0 24px 24px 72px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
  border-left: 2px solid rgba(255, 255, 255, 0.04);
  margin-left: 55px;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
  margin-top: 16px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color 0.2s, padding-left 0.2s;
}

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

.footer-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
}

.footer-contact i {
  width: 16px;
  color: var(--accent-cyan);
  font-size: 13px;
}

.footer-contact a {
  color: var(--text-secondary);
  padding: 0;
  transition: color 0.2s;
}

.footer-contact a:hover {
  color: var(--accent-cyan);
  padding: 0;
}

.footer-copyright {
  text-align: center;
  padding: 28px 0 32px;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 14px;
  }

  .header-inner {
    gap: 16px;
  }

  .alt-row {
    gap: 40px;
  }

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

@media (max-width: 767px) {
  .top-bar-inner {
    justify-content: space-between;
  }

  .top-bar-domain span:not(.status-dot) {
    display: none;
  }

  .main-nav,
  .header-actions .btn-ghost,
  .header-actions .btn-primary {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-drawer {
    display: flex;
  }

  .header-inner {
    height: 60px;
  }

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

  .hero-category {
    padding: 48px 0 56px;
  }

  .hero-category h1 {
    font-size: 1.75rem;
  }

  .hero-category-desc {
    font-size: 15px;
  }

  .alt-section {
    padding: 56px 0;
  }

  .alt-row {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }

  .alt-row.reverse .alt-media {
    order: 1;
  }

  .alt-row.reverse .alt-text {
    order: 2;
  }

  .cta-band {
    padding: 48px 0;
    background-attachment: scroll;
  }

  .cta-band .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .cta-band .btn-primary {
    width: 100%;
    justify-content: center;
  }

  .faq-section {
    padding: 56px 0;
  }

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

  .faq-answer-inner {
    padding: 0 16px 20px 20px;
    margin-left: 40px;
    font-size: 14px;
  }

  .footer {
    padding-top: 48px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 32px;
  }
}

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

  .alt-text h2 {
    font-size: 1.35rem;
  }

  .section-title {
    font-size: 1.4rem;
  }
}

/* roulang page: article */
:root {
  --bg-primary: #060A17;
  --bg-surface: rgba(15, 22, 41, 0.66);
  --accent: #22D3EE;
  --accent-hover: #38BDF8;
  --accent-secondary: #3B82F6;
  --gold: #F2B84D;
  --text-primary: #EDF2F7;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: rgba(255, 255, 255, 0.09);
  --radius-card: 16px;
  --radius-control: 10px;
  --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
  --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 18px rgba(59, 130, 246, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-feature-settings: "tnum";
  background:
    radial-gradient(ellipse 80% 50% at 85% 0%, rgba(59, 130, 246, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 40% at 10% 10%, rgba(34, 211, 238, 0.05), transparent 50%),
    var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.gold-text {
  color: var(--gold);
}

/* ===== Topbar ===== */
.topbar {
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.topbar-domain {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  display: inline-block;
}

.topbar-action {
  color: var(--accent);
  font-weight: 500;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.topbar-action:hover {
  border-bottom-color: var(--accent);
}

/* ===== Main Nav ===== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 23, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.main-nav.scrolled {
  background: rgba(6, 10, 23, 0.9);
  box-shadow: 0 8px 30px rgba(2, 6, 23, 0.5);
}

.main-nav .container {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 32px;
}

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

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  position: relative;
  flex-shrink: 0;
  background: rgba(34, 211, 238, 0.08);
}

.brand-mark::after {
  content: '';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 2px;
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nav-link.active {
  color: var(--text-primary);
  font-weight: 500;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 2px;
  width: 24px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 10px;
  padding: 0 18px;
  height: 38px;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  color: #04121A;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.45), 0 6px 24px rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2), 0 0 20px rgba(34, 211, 238, 0.3);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* ===== Mobile Drawer ===== */
.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(6, 10, 23, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  padding: 24px;
}

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

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 48px;
}

.drawer-close {
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  color: var(--text-primary);
  font-size: 1.125rem;
  cursor: pointer;
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-links a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 12px 16px;
  border-radius: 12px;
  transition: all 0.25s ease;
}

.drawer-links a:hover,
.drawer-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.drawer-cta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.drawer-cta .btn {
  width: 100%;
  height: 48px;
  font-size: 1rem;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 28px 0 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb .sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 260px;
}

/* ===== Article ===== */
.article-page {
  padding-bottom: 80px;
  background:
    linear-gradient(rgba(6, 10, 23, 0.4), rgba(6, 10, 23, 0.92)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  background-attachment: fixed;
}

.article-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-meta .sep {
  opacity: 0.4;
}

.meta-author {
  color: var(--text-secondary);
}

.meta-badge {
  display: inline-block;
  background: rgba(242, 184, 77, 0.12);
  border: 1px solid rgba(242, 184, 77, 0.35);
  color: var(--gold);
  font-size: 0.75rem;
  padding: 2px 12px;
  border-radius: 999px;
  font-weight: 500;
}

.article-body {
  background: rgba(6, 10, 23, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 40px 48px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.article-body .content {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-primary);
}

.article-body .content h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 4px solid var(--accent);
}

.article-body .content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-body .content p {
  margin-bottom: 24px;
  line-height: 1.75;
  color: rgba(237, 242, 247, 0.85);
}

.article-body .content blockquote {
  border-left: 4px solid var(--gold);
  background: rgba(255, 255, 255, 0.04);
  padding: 16px 24px;
  border-radius: 0 10px 10px 0;
  margin: 24px 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body .content img {
  border-radius: 12px;
  margin: 24px 0;
  width: 100%;
}

.article-body .content code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.875em;
  font-family: "SF Mono", Consolas, monospace;
}

.article-body .content ul {
  margin: 16px 0 24px;
  padding-left: 12px;
  list-style: none;
}

.article-body .content ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: rgba(237, 242, 247, 0.85);
}

.article-body .content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.article-body .content a {
  color: var(--accent);
  border-bottom: 1px solid rgba(34, 211, 238, 0.3);
  transition: border-color 0.25s ease;
}

.article-body .content a:hover {
  border-bottom-color: var(--accent);
}

/* ===== Tags & Share ===== */
.article-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  padding: 4px 14px;
  border-radius: 999px;
  transition: all 0.25s ease;
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(34, 211, 238, 0.06);
}

.share-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.share-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-right: 8px;
}

.share-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.share-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(34, 211, 238, 0.08);
  transform: translateY(-2px);
}

.share-btn:active {
  transform: translateY(0);
}

.share-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Related Section ===== */
.related-section {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

.related-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-title::before {
  content: '';
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-secondary));
}

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

.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(15, 22, 41, 0.5);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
  transition: all 0.3s ease;
}

.related-card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(15, 22, 41, 0.8);
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}

.related-card .thumb {
  width: 96px;
  height: 64px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
}

.related-card .info {
  flex: 1;
  min-width: 0;
}

.related-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.related-card h3 a:hover {
  color: var(--accent);
}

.related-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.related-card .time {
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  font-feature-settings: "tnum";
}

/* ===== Back Link ===== */
.back-link-wrap {
  max-width: 760px;
  margin: 32px auto 0;
  padding: 0 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all 0.25s ease;
}

.back-link i {
  transition: transform 0.25s ease;
}

.back-link:hover {
  color: var(--accent);
}

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

/* ===== Not Found ===== */
.not-found {
  text-align: center;
  padding: 100px 24px;
  max-width: 560px;
  margin: 0 auto;
}

.not-found .icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: var(--accent);
}

.not-found h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.not-found .btn {
  height: 44px;
  padding: 0 28px;
  font-size: 0.9375rem;
}

/* ===== Footer ===== */
.footer {
  background: #04070F;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 64px 0 24px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .brand-text {
  font-size: 1.25rem;
}

.footer-desc {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color 0.25s ease, transform 0.25s ease;
}

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

.footer-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 6px 0;
}

.footer-contact i {
  width: 18px;
  color: var(--accent);
  font-size: 0.875rem;
}

.footer-contact a {
  padding: 0;
  display: inline;
  color: var(--text-secondary);
}

.footer-contact a:hover {
  color: var(--accent);
  transform: none;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 24px;
  }

  .nav-links {
    gap: 2px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.875rem;
  }

  .nav-actions .btn-ghost {
    display: none;
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
  }

  .nav-actions .btn-ghost {
    display: none;
  }

  .nav-actions .btn-primary {
    display: none;
  }

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

  .article-page {
    background-attachment: scroll;
  }

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

  .topbar-action {
    font-size: 0.75rem;
  }

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

  .related-card {
    flex-direction: row;
  }

  .related-card .time {
    display: none;
  }
}

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

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

  .article-body {
    padding: 20px 16px;
    border-radius: 12px;
  }

  .breadcrumb {
    padding: 20px 0 16px;
    font-size: 0.75rem;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .article-header h1 {
    font-size: 1.375rem;
  }

  .article-meta {
    gap: 8px;
    font-size: 0.8125rem;
  }

  .related-section,
  .back-link-wrap {
    padding: 0 16px;
  }

  .related-card {
    padding: 12px;
    gap: 12px;
  }

  .related-card .thumb {
    width: 72px;
    height: 48px;
  }

  .share-btn {
    width: 32px;
    height: 32px;
  }
}

/* roulang page: category2 */
:root {
      --bg-primary: #060A17;
      --bg-surface: rgba(15, 22, 41, 0.66);
      --bg-elevated: rgba(20, 30, 50, 0.75);
      --accent-primary: #22D3EE;
      --accent-hover: #38BDF8;
      --accent-secondary: #3B82F6;
      --accent-gold: #F2B84D;
      --text-primary: #EDF2F7;
      --text-secondary: #94A3B8;
      --text-muted: #64748B;
      --text-inverse: #0A0F1E;
      --border-glass: rgba(255, 255, 255, 0.09);
      --border-strong: rgba(255, 255, 255, 0.14);
      --radius-card: 16px;
      --radius-control: 10px;
      --radius-large: 20px;
      --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
      --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 18px rgba(59, 130, 246, 0.3);
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.75;
      font-feature-settings: "tnum";
      font-size: 15px;
      overflow-x: hidden;
    }

    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(ellipse at 20% 0%, rgba(37, 99, 235, 0.18) 0%, transparent 55%),
        radial-gradient(ellipse at 90% 90%, rgba(34, 211, 238, 0.08) 0%, transparent 45%);
      pointer-events: none;
      z-index: 0;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 16px;
      padding-right: 16px;
      position: relative;
      z-index: 1;
    }

    @media (min-width: 768px) {
      .container {
        padding-left: 24px;
        padding-right: 24px;
      }
    }

    @media (min-width: 1024px) {
      .container {
        padding-left: 32px;
        padding-right: 32px;
      }
    }

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

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

    button {
      font-family: inherit;
    }

    input, textarea {
      font-family: inherit;
    }

    /* 顶部信息条 */
    .top-info {
      height: 36px;
      background: rgba(0, 0, 0, 0.3);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 12px;
      color: var(--text-secondary);
      position: relative;
      z-index: 100;
    }

    .top-info .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    .top-info .left {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #22C55E;
      box-shadow: 0 0 6px rgba(34, 197, 94, 0.6);
      flex-shrink: 0;
    }

    .domain-text {
      font-family: "SF Mono", "Consolas", monospace;
      letter-spacing: 0.3px;
    }

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

    .top-info .right a:hover {
      color: var(--accent-primary);
      text-decoration: underline;
    }

    @media (max-width: 640px) {
      .top-info .middle-text {
        display: none;
      }
    }

    /* 主导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(6, 10, 23, 0.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      transition: all 0.3s;
    }

    .main-header.scrolled {
      background: rgba(6, 10, 23, 0.92);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    }

    .main-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }

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

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 9px;
      background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
      position: relative;
      box-shadow: 0 0 14px rgba(34, 211, 238, 0.3);
      flex-shrink: 0;
    }

    .brand-mark::after {
      content: '';
      position: absolute;
      top: 8px;
      right: 8px;
      width: 8px;
      height: 8px;
      background: var(--accent-gold);
      border-radius: 2px;
    }

    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .gold-text {
      color: var(--accent-gold);
    }

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

    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 2px;
      position: relative;
      transition: color 0.2s;
    }

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

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

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 24px;
      height: 3px;
      background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
      border-radius: 3px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-ghost {
      padding: 8px 18px;
      border: 1px solid var(--border-glass);
      border-radius: 8px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
      background: transparent;
      transition: all 0.2s;
    }

    .btn-ghost:hover {
      border-color: var(--accent-primary);
      background: rgba(255, 255, 255, 0.08);
      color: var(--text-primary);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 22px;
      background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
      color: #0A0F1E;
      font-weight: 600;
      font-size: 13px;
      border-radius: 8px;
      box-shadow: var(--shadow-glow);
      transition: all 0.25s;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(34, 211, 238, 0.45), 0 6px 24px rgba(59, 130, 246, 0.4);
      filter: brightness(1.1);
    }

    .btn-primary:active {
      transform: translateY(-1px);
      box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .hamburger {
      display: none;
      width: 40px;
      height: 40px;
      background: transparent;
      border: 1px solid var(--border-glass);
      border-radius: 8px;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-primary);
      font-size: 18px;
    }

    .hamburger:hover {
      border-color: var(--accent-primary);
    }

    /* 移动端抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 100%;
      max-width: 320px;
      height: 100vh;
      background: rgba(6, 10, 23, 0.96);
      backdrop-filter: blur(20px);
      z-index: 200;
      padding: 80px 32px 40px;
      transition: right 0.35s ease;
      border-left: 1px solid var(--border-glass);
      display: flex;
      flex-direction: column;
    }

    .mobile-drawer.open {
      right: 0;
    }

    .mobile-drawer a {
      font-size: 20px;
      line-height: 48px;
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 0.2s;
    }

    .mobile-drawer a:hover,
    .mobile-drawer a.active {
      color: var(--accent-primary);
    }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      z-index: 195;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s;
    }

    .drawer-overlay.open {
      opacity: 1;
      pointer-events: auto;
    }

    .drawer-download {
      margin-top: 32px;
      padding: 14px 0;
      text-align: center;
      background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
      color: #0A0F1E;
      border-radius: 10px;
      font-weight: 600;
      font-size: 15px;
    }

    /* 页面Hero */
    .page-hero {
      position: relative;
      padding: 72px 0 56px;
      background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
      border-bottom: 1px solid var(--border-glass);
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(6, 10, 23, 0.78);
    }

    .page-hero::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(ellipse at 80% 10%, rgba(34, 211, 238, 0.12) 0%, transparent 50%);
      animation: pulseGlow 6s ease-in-out infinite alternate;
    }

    @keyframes pulseGlow {
      0% { opacity: 0.6; }
      100% { opacity: 1; }
    }

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

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 20px;
    }

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

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

    .breadcrumb .sep {
      color: var(--text-muted);
      font-size: 11px;
    }

    .breadcrumb .current {
      color: var(--text-primary);
      font-weight: 500;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 260px;
    }

    .page-hero h1 {
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 700;
      letter-spacing: -0.01em;
      margin-bottom: 16px;
      color: var(--text-primary);
      line-height: 1.25;
    }

    .page-hero .hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 640px;
      line-height: 1.75;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border-glass);
      border-radius: 999px;
      font-size: 12px;
      color: var(--text-secondary);
      margin-bottom: 18px;
    }

    .hero-badge .dot {
      width: 5px;
      height: 5px;
      background: var(--accent-gold);
      border-radius: 50%;
    }

    /* 主体两栏 */
    .manual-section {
      padding: 72px 0 80px;
      position: relative;
      z-index: 1;
    }

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

    @media (min-width: 1024px) {
      .manual-section {
        padding: 88px 0 100px;
      }
      .manual-layout {
        grid-template-columns: 260px 1fr;
        gap: 56px;
      }
    }

    /* 左侧目录 */
    .manual-toc {
      position: static;
      align-self: start;
    }

    @media (min-width: 1024px) {
      .manual-toc {
        position: sticky;
        top: 96px;
        max-height: calc(100vh - 120px);
        overflow-y: auto;
      }
    }

    .toc-card {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      box-shadow: var(--shadow-card);
    }

    .toc-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 18px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border-glass);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .toc-title i {
      color: var(--accent-primary);
      font-size: 13px;
    }

    .toc-list {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .toc-link {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 400;
      color: var(--text-secondary);
      transition: all 0.2s;
      border-left: 3px solid transparent;
    }

    .toc-link i {
      font-size: 11px;
      color: var(--text-muted);
      width: 16px;
      text-align: center;
      transition: color 0.2s;
    }

    .toc-link:hover {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
      border-left-color: var(--accent-primary);
    }

    .toc-link:hover i {
      color: var(--accent-primary);
    }

    .toc-link.active {
      background: rgba(34, 211, 238, 0.08);
      color: var(--accent-primary);
      border-left-color: var(--accent-primary);
      font-weight: 500;
    }

    /* 右侧长文 */
    .manual-content {
      min-width: 0;
    }

    .manual-block {
      margin-bottom: 72px;
    }

    .manual-block:last-child {
      margin-bottom: 0;
    }

    .manual-block h2 {
      font-size: clamp(1.5rem, 3vw, 2rem);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
      position: relative;
      padding-left: 18px;
      color: var(--text-primary);
      letter-spacing: -0.01em;
    }

    .manual-block h2::before {
      content: '';
      position: absolute;
      left: 0;
      top: 4px;
      width: 4px;
      height: 24px;
      border-radius: 4px;
      background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    }

    .manual-block .block-number {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(34, 211, 238, 0.12);
      color: var(--accent-primary);
      font-size: 13px;
      font-weight: 700;
      margin-right: 10px;
      vertical-align: middle;
    }

    .manual-block p {
      font-size: 15px;
      line-height: 1.8;
      color: var(--text-secondary);
      margin-bottom: 20px;
    }

    .manual-block strong {
      color: var(--text-primary);
      font-weight: 600;
    }

    .manual-block ul {
      margin: 16px 0 24px;
      padding-left: 0;
      list-style: none;
    }

    .manual-block ul li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 12px;
      font-size: 15px;
      line-height: 1.7;
      color: var(--text-secondary);
    }

    .manual-block ul li::before {
      content: '\f00c';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 11px;
      position: absolute;
      left: 0;
      top: 5px;
      color: var(--accent-primary);
    }

    .manual-block ul li strong {
      color: var(--text-primary);
    }

    .tip-box {
      display: flex;
      gap: 14px;
      padding: 20px 24px;
      background: rgba(242, 184, 77, 0.06);
      border: 1px solid rgba(242, 184, 77, 0.2);
      border-radius: var(--radius-card);
      margin: 24px 0;
    }

    .tip-box i {
      color: var(--accent-gold);
      font-size: 18px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .tip-box p {
      margin-bottom: 0;
      color: var(--text-secondary);
      font-size: 14px;
      line-height: 1.7;
    }

    .info-box {
      display: flex;
      gap: 14px;
      padding: 20px 24px;
      background: rgba(34, 211, 238, 0.04);
      border: 1px solid rgba(34, 211, 238, 0.15);
      border-radius: var(--radius-card);
      margin: 24px 0;
    }

    .info-box i {
      color: var(--accent-primary);
      font-size: 18px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .info-box p {
      margin-bottom: 0;
      color: var(--text-secondary);
      font-size: 14px;
    }

    .manual-img {
      border-radius: var(--radius-large);
      overflow: hidden;
      margin: 28px 0;
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: var(--shadow-card);
    }

    .manual-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .manual-img:hover img {
      transform: scale(1.01);
    }

    .manual-img .img-caption {
      padding: 12px 16px;
      background: rgba(6, 10, 23, 0.9);
      font-size: 13px;
      color: var(--text-muted);
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    /* 步骤条 */
    .step-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0 32px;
    }

    .step-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      padding: 20px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-card);
      transition: all 0.2s;
    }

    .step-item:hover {
      background: rgba(34, 211, 238, 0.04);
      border-color: rgba(34, 211, 238, 0.2);
    }

    .step-num {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
      color: #0A0F1E;
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
      box-shadow: 0 0 12px rgba(34, 211, 238, 0.2);
    }

    .step-content {
      flex: 1;
    }

    .step-content h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 4px;
    }

    .step-content p {
      font-size: 14px;
      line-height: 1.65;
      color: var(--text-secondary);
      margin-bottom: 0;
    }

    /* 中后部下载按钮组 */
    .inline-download {
      margin: 48px 0;
      padding: 36px 32px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-large);
      text-align: center;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }

    .inline-download::before {
      content: '';
      position: absolute;
      top: -60px;
      right: -60px;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.1), transparent 70%);
    }

    .inline-download h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-primary);
    }

    .inline-download p {
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 24px;
    }

    .inline-download .btn-group {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-download {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
      color: #0A0F1E;
      font-weight: 600;
      font-size: 15px;
      border-radius: 10px;
      box-shadow: var(--shadow-glow);
      transition: all 0.25s;
      cursor: pointer;
      border: none;
    }

    .btn-download:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(34, 211, 238, 0.5), 0 6px 24px rgba(59, 130, 246, 0.4);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 28px;
      border: 1px solid var(--border-glass);
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.03);
      transition: all 0.25s;
    }

    .btn-outline:hover {
      border-color: var(--accent-primary);
      color: var(--accent-primary);
      background: rgba(255, 255, 255, 0.06);
    }

    .btn-sm {
      padding: 10px 22px;
      font-size: 14px;
    }

    /* 导航锚点定位间距 */
    .anchor-target {
      scroll-margin-top: 90px;
    }

    /* 相关分类链接条 */
    .related-cats {
      padding: 64px 0;
      border-top: 1px solid var(--border-glass);
      background: rgba(4, 7, 15, 0.6);
    }

    .related-cats .section-title {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 28px;
      color: var(--text-primary);
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    @media (max-width: 768px) {
      .related-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }
    }

    .related-card {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 24px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-card);
      transition: all 0.25s;
    }

    .related-card:hover {
      background: rgba(34, 211, 238, 0.04);
      border-color: rgba(34, 211, 238, 0.25);
      transform: translateY(-2px);
    }

    .related-card .icon-wrap {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      background: rgba(34, 211, 238, 0.1);
      color: var(--accent-primary);
      font-size: 18px;
    }

    .related-card h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 2px;
    }

    .related-card p {
      font-size: 13px;
      color: var(--text-muted);
      margin: 0;
    }

    /* Footer */
    .footer {
      background: #04070F;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding: 64px 0 24px;
      position: relative;
      z-index: 1;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 40px;
      }
    }

    .footer-brand .brand {
      margin-bottom: 14px;
    }

    .footer-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 280px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 16px;
    }

    .footer-col a {
      display: block;
      font-size: 14px;
      color: var(--text-secondary);
      padding: 6px 0;
      transition: color 0.2s;
    }

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

    .footer-contact {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-secondary);
      padding: 6px 0;
    }

    .footer-contact i {
      color: var(--accent-gold);
      width: 16px;
      font-size: 13px;
    }

    .footer-copyright {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .main-nav {
        gap: 18px;
      }
      .nav-actions .btn-ghost {
        display: none;
      }
    }

    @media (max-width: 768px) {
      .main-nav {
        display: none;
      }
      .nav-actions {
        display: none;
      }
      .hamburger {
        display: flex;
      }

      .page-hero {
        padding: 56px 0 44px;
      }

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

      .manual-section {
        padding: 48px 0 56px;
      }

      .manual-block {
        margin-bottom: 48px;
      }

      .manual-block h2 {
        font-size: 22px;
        padding-left: 14px;
      }

      .manual-block h2::before {
        width: 3px;
        height: 20px;
      }

      .step-item {
        padding: 16px;
        flex-direction: column;
        gap: 10px;
      }

      .inline-download {
        padding: 28px 20px;
      }

      .inline-download h3 {
        font-size: 18px;
      }

      .btn-download,
      .btn-outline {
        width: 100%;
        justify-content: center;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding-left: 14px;
        padding-right: 14px;
      }
      .brand-text {
        font-size: 16px;
      }
      .page-hero {
        padding: 44px 0 36px;
      }
      .page-hero h1 {
        font-size: 24px;
      }
      .hero-desc {
        font-size: 14px;
      }
      .related-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 滚动条 */
    ::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }

    ::-webkit-scrollbar-track {
      background: rgba(255, 255, 255, 0.02);
    }

    ::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.12);
      border-radius: 3px;
    }

    ::-webkit-scrollbar-thumb:hover {
      background: rgba(255, 255, 255, 0.2);
    }

    /* 焦点可见性 */
    :focus-visible {
      outline: 2px solid var(--accent-primary);
      outline-offset: 2px;
    }

    /* 目录中的下载卡片 */
    .toc-download {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid var(--border-glass);
      text-align: center;
    }

    .toc-download .btn-primary {
      width: 100%;
      justify-content: center;
    }

    .toc-download .version-hint {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 10px;
    }

/* roulang page: category3 */
:root {
            --bg-primary: #060A17;
            --bg-card: rgba(15, 22, 41, 0.66);
            --accent: #22D3EE;
            --accent-hover: #38BDF8;
            --accent-secondary: #3B82F6;
            --gold: #F2B84D;
            --text-primary: #EDF2F7;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-color: rgba(255,255,255,0.09);
            --radius-card: 16px;
            --radius-control: 10px;
            --radius-large: 20px;
            --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 18px rgba(59, 130, 246, 0.3);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 0%, rgba(34, 211, 238, 0.08), transparent 55%),
                radial-gradient(ellipse at 80% 100%, rgba(59, 130, 246, 0.06), transparent 50%);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
        }

        button {
            font-family: inherit;
        }

        ::selection {
            background: rgba(34, 211, 238, 0.3);
            color: #fff;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Top Bar ===== */
        .top-bar {
            height: 36px;
            background: rgba(0, 0, 0, 0.3);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .domain-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--gold);
            box-shadow: 0 0 8px rgba(242, 184, 77, 0.6);
            flex-shrink: 0;
        }
        .top-bar a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }
        .top-bar a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        /* ===== Main Nav ===== */
        .main-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 10, 23, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: background 0.3s ease;
        }
        .main-nav.scrolled {
            background: rgba(6, 10, 23, 0.95);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 32px;
            height: 32px;
            border: 1.5px solid var(--accent);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: rgba(34, 211, 238, 0.08);
        }
        .brand-mark::before {
            content: '';
            width: 8px;
            height: 8px;
            background: var(--gold);
            border-radius: 2px;
            position: absolute;
            bottom: 5px;
            right: 5px;
        }
        .brand-text {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .gold-text {
            color: var(--gold);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-link {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9375rem;
            font-weight: 500;
            position: relative;
            padding: 20px 0;
            transition: color 0.25s;
        }
        .nav-link:hover {
            color: var(--text-primary);
        }
        .nav-link.active {
            color: var(--text-primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: var(--radius-control);
            font-weight: 500;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
            font-size: 0.9375rem;
            border: none;
            line-height: 1;
        }
        .btn-ghost {
            height: 38px;
            padding: 0 18px;
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }
        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.08);
        }
        .btn-primary {
            height: 38px;
            padding: 0 22px;
            background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
            color: #0A0F1E;
            font-weight: 600;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(34, 211, 238, 0.45), 0 6px 22px rgba(59, 130, 246, 0.35);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.2);
        }
        .btn:focus-visible,
        .nav-link:focus-visible,
        .brand:focus-visible,
        .card-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .hamburger span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 10, 23, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 200;
            padding: 80px 32px 32px;
            flex-direction: column;
            gap: 24px;
        }
        .mobile-drawer.open {
            display: flex;
        }
        .mobile-drawer a {
            color: var(--text-primary);
            font-size: 1.25rem;
            line-height: 48px;
            text-decoration: none;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer a.active {
            color: var(--accent);
        }
        .mobile-drawer .btn-primary {
            margin-top: 24px;
            height: 48px;
            justify-content: center;
            font-size: 1rem;
        }
        .drawer-close {
            position: absolute;
            top: 24px;
            right: 24px;
            background: none;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 10px;
            font-size: 1.25rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: border-color 0.2s, color 0.2s;
        }
        .drawer-close:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 72px 0 56px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(6, 10, 23, 0.78);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(34, 211, 238, 0.15), transparent 55%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--text-secondary);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(242, 184, 77, 0.1);
            border: 1px solid rgba(242, 184, 77, 0.3);
            color: var(--gold);
            font-size: 0.8125rem;
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 18px;
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4vw, 2.75rem);
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .hero-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .hero-stats {
            display: flex;
            align-items: center;
            gap: 32px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .hero-stat .num {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--text-primary);
            font-feature-settings: "tnum";
        }
        .hero-stat .label {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* ===== Section Base ===== */
        .section {
            padding: 72px 0;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--accent), var(--accent-secondary));
            flex-shrink: 0;
        }
        .section-sub {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            max-width: 620px;
            margin-bottom: 40px;
        }

        /* ===== Support Cards ===== */
        .support-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .support-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-large);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .support-card:hover {
            transform: translateY(-4px);
            border-color: rgba(34, 211, 238, 0.35);
            box-shadow: 0 18px 50px rgba(2, 6, 23, 0.55), 0 0 24px rgba(34, 211, 238, 0.08);
        }
        .card-banner {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--border-color);
        }
        .card-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .card-title i {
            color: var(--accent);
            font-size: 1rem;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: rgba(34, 211, 238, 0.12);
            flex-shrink: 0;
        }
        .card-desc {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .card-list {
            list-style: none;
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .card-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.6;
        }
        .card-list li i {
            color: var(--gold);
            font-size: 0.75rem;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            text-decoration: none;
            font-size: 0.875rem;
            font-weight: 500;
            transition: gap 0.25s ease, color 0.2s;
            margin-top: auto;
        }
        .card-link:hover {
            gap: 10px;
            color: var(--accent-hover);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item.open {
            border-color: rgba(34, 211, 238, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-primary);
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: var(--text-primary);
        }
        .faq-q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(242, 184, 77, 0.12);
            border: 1px solid rgba(242, 184, 77, 0.3);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 0.8125rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-toggle {
            margin-left: auto;
            font-size: 1.25rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-weight: 400;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            margin-left: 28px;
            border-left: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.75;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            text-align: center;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(6, 10, 23, 0.82);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(34, 211, 238, 0.12), transparent 60%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 0.9375rem;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            height: 56px;
            padding: 0 40px;
            font-size: 1rem;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
            color: #0A0F1E;
            font-weight: 600;
            box-shadow: var(--shadow-glow);
            text-decoration: none;
            transition: all 0.25s ease;
            cursor: pointer;
            border: none;
        }
        .btn-large:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(34, 211, 238, 0.45), 0 6px 22px rgba(59, 130, 246, 0.35);
            filter: brightness(1.08);
        }
        .btn-large:active {
            transform: translateY(-1px);
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.2);
        }

        /* ===== Footer ===== */
        .footer {
            background: #04070F;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            color: var(--text-primary);
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.875rem;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-contact {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.875rem;
            padding: 4px 0;
        }
        .footer-contact i {
            width: 16px;
            color: var(--text-secondary);
        }
        .footer-contact a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.2s;
            display: inline;
            padding: 0;
        }
        .footer-contact a:hover {
            color: var(--accent);
        }
        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.8125rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }
            .top-bar {
                padding: 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-links {
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-actions .btn-ghost {
                display: none;
            }
            .nav-actions .btn-primary {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .support-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .top-bar {
                padding: 0 16px;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .section {
                padding: 56px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat .num {
                font-size: 1.125rem;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 1rem;
            }
            .brand-mark {
                width: 28px;
                height: 28px;
            }
            .top-bar .center-text {
                display: none;
            }
            .card-body {
                padding: 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.875rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                margin-left: 20px;
            }
            .btn-large {
                width: 100%;
                justify-content: center;
                padding: 0 24px;
            }
        }