/* roulang page: index */
:root {
  --bg-primary: #0D1322;
  --bg-secondary: #121A2B;
  --bg-deep: #090D16;
  --brand-blue: #2F6BFF;
  --brand-cyan: #22D3EE;
  --brand-purple: #7C6CFF;
  --success: #34D399;
  --warning: #F59E0B;
  --text-primary: #EDF2F9;
  --text-body: #C5D0E0;
  --text-secondary: #8C9BB0;
  --text-muted: #5B6B82;
  --nav-bg: #FFFFFF;
  --nav-text: #1A2233;
  --nav-border: #E7EBF2;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0,0,0,0.2);
  --shadow-glass: 0 20px 45px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 0 1px rgba(47,107,255,0.4), 0 8px 30px rgba(47,107,255,0.35);
  --space-section: 96px;
  --space-section-mobile: 56px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}
ul, ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--space-section) 0;
  position: relative;
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: 1.875rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}
.section-head .head-icon {
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
  border-radius: 4px;
  margin: 16px auto 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 2px rgba(47,107,255,0.5), 0 12px 36px rgba(47,107,255,0.45);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 0 2px rgba(47,107,255,0.6), 0 6px 24px rgba(47,107,255,0.4);
}
.btn-primary:focus-visible {
  outline: 3px solid var(--brand-cyan);
  outline-offset: 2px;
}
.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-2px);
}
.btn-secondary:focus-visible {
  outline: 3px solid var(--brand-cyan);
  outline-offset: 2px;
}
.btn-large {
  padding: 16px 44px;
  font-size: 1rem;
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(47,107,255,0.15);
  color: var(--brand-cyan);
  border: 1px solid rgba(47,107,255,0.3);
}
.tag-cyan {
  background: rgba(34,211,238,0.12);
  color: var(--brand-cyan);
  border-color: rgba(34,211,238,0.3);
}
.tag-purple {
  background: rgba(124,108,255,0.12);
  color: var(--brand-purple);
  border-color: rgba(124,108,255,0.3);
}
.tag-amber {
  background: rgba(245,158,11,0.12);
  color: var(--warning);
  border-color: rgba(245,158,11,0.3);
}
.tag-green {
  background: rgba(52,211,153,0.12);
  color: var(--success);
  border-color: rgba(52,211,153,0.3);
}
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glass);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
}
.badge-recommend {
  background: linear-gradient(135deg, rgba(245,158,11,0.2), rgba(245,158,11,0.1));
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.4);
}
.empty-state {
  text-align: center;
  color: var(--text-secondary);
  padding: 32px;
  font-size: 0.9375rem;
}
/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nav-text);
  letter-spacing: 0.01em;
}
.nav-logo i {
  font-size: 1.5rem;
  color: var(--brand-blue);
  background: linear-gradient(135deg, rgba(47,107,255,0.12), rgba(34,211,238,0.12));
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 8px 2px;
  position: relative;
  transition: color 0.3s;
}
.nav-links a:hover {
  color: var(--brand-blue);
}
.nav-links a.active {
  color: var(--brand-blue);
  font-weight: 600;
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
  border-radius: 2px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F5F7FA;
  border: 1px solid #E7EBF2;
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.nav-search i {
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.nav-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.875rem;
  width: 140px;
  color: var(--nav-text);
}
.nav-search input::placeholder {
  color: var(--text-secondary);
}
.nav-search:focus-within {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.15);
}
.nav-cta {
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(47,107,255,0.25);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(47,107,255,0.35);
}
.nav-cta:focus-visible {
  outline: 3px solid var(--brand-cyan);
  outline-offset: 2px;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--nav-text);
  background: #F5F7FA;
  border: 1px solid var(--nav-border);
  transition: background 0.3s;
}
.menu-toggle:hover {
  background: #EDF0F4;
}
.mobile-menu {
  display: none;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 12px 24px rgba(0,0,0,0.08);
  padding: 16px 24px;
  z-index: 999;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a {
  display: block;
  padding: 14px 12px;
  color: var(--nav-text);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 10px;
  transition: background 0.2s;
}
.mobile-menu a:hover {
  background: #F5F7FA;
}
.mobile-menu a.active {
  color: var(--brand-blue);
  background: rgba(47,107,255,0.06);
}
.mobile-menu .mobile-cta {
  margin-top: 12px;
  text-align: center;
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  color: #fff;
  font-weight: 600;
}
/* ========== Hero ========== */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  padding: 80px 0 96px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.28;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg-primary) 0%, transparent 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 56px;
}
.hero-text {
  flex: 1;
}
.hero-badges {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
}
.hero-badge i {
  color: var(--success);
  font-size: 0.75rem;
}
.hero-badge-cyan i {
  color: var(--brand-cyan);
}
.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-visual {
  flex: 1;
  position: relative;
}
.hero-window {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(20px);
  aspect-ratio: 16 / 10;
  display: flex;
  flex-direction: column;
  position: relative;
}
.hero-window-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.hero-window-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.hero-window-header .dot-red { background: #FF5F57; }
.hero-window-header .dot-yellow { background: #FEBC2E; }
.hero-window-header .dot-green { background: #28C840; }
.hero-window-header span {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-window-header span i {
  color: var(--success);
}
.hero-window-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 30% 40%, rgba(47,107,255,0.15), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(34,211,238,0.1), transparent 50%),
    rgba(255,255,255,0.03);
  position: relative;
}
.hero-play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--brand-blue);
  box-shadow: 0 12px 32px rgba(47,107,255,0.4);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 12px 32px rgba(47,107,255,0.4); }
  50% { transform: scale(1.05); box-shadow: 0 12px 44px rgba(47,107,255,0.6); }
}
.hero-float-card {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(13,19,34,0.75);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-float-card .online-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(52,211,153,0.2), rgba(52,211,153,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
  font-size: 1rem;
}
.hero-float-card .info h4 {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 2px;
}
.hero-float-card .info p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.hero-float-card .status {
  margin-left: auto;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(52,211,153,0.15);
  color: var(--success);
  font-size: 0.75rem;
  font-weight: 600;
}
/* ========== Compare ========== */
.compare-section {
  background: var(--bg-secondary);
}
.compare-grid {
  display: flex;
  gap: 32px;
  align-items: stretch;
}
.compare-col {
  flex: 1;
  border-radius: var(--radius-lg);
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}
.compare-col:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glass);
}
.compare-col.member {
  background: linear-gradient(145deg, rgba(47,107,255,0.18), rgba(34,211,238,0.08), rgba(124,108,255,0.06));
  border: 1px solid rgba(47,107,255,0.4);
  box-shadow: var(--shadow-glow);
}
.compare-col.member:hover {
  box-shadow: 0 0 0 1px rgba(47,107,255,0.5), 0 20px 48px rgba(47,107,255,0.35);
}
.compare-col-head {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: relative;
}
.compare-col-head .role-name {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.compare-col-head .role-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}
.compare-col-head .recommend-badge {
  position: absolute;
  top: -8px;
  right: 20px;
}
.compare-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.compare-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
}
.compare-item .item-icon {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}
.compare-item .item-icon.yes {
  background: rgba(52,211,153,0.15);
  color: var(--success);
}
.compare-item .item-icon.no {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
}
.compare-item .item-label {
  flex: 1;
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.compare-item .item-value {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
}
.compare-item .item-value.weak {
  color: var(--text-muted);
  font-weight: 400;
}
/* ========== Tiers ========== */
.tiers-section {
  background: var(--bg-primary);
}
.tier-list {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 48px;
}
.tier-list::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--brand-blue), var(--brand-purple), var(--brand-cyan));
}
.tier-item {
  position: relative;
  padding: 28px 28px 24px;
  margin-bottom: 28px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  transition: all 0.3s ease;
}
.tier-item:hover {
  transform: translateX(8px);
  border-color: rgba(47,107,255,0.3);
  box-shadow: var(--shadow-card);
}
.tier-item::before {
  content: '';
  position: absolute;
  left: -38px;
  top: 36px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--brand-blue);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.3);
}
.tier-item:nth-child(2)::before {
  background: var(--brand-purple);
  box-shadow: 0 0 0 3px rgba(124,108,255,0.3);
}
.tier-item:nth-child(3)::before {
  background: var(--brand-cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.3);
}
.tier-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.tier-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}
.tier-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tier-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.tier-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tier-benefit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 0.75rem;
  color: var(--text-body);
}
.tier-benefit i {
  color: var(--success);
  font-size: 0.6875rem;
}
.tier-progress {
  margin-top: 20px;
  height: 6px;
  border-radius: 6px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.tier-progress-bar {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
}
.tier-item:nth-child(2) .tier-progress-bar {
  background: linear-gradient(90deg, var(--brand-purple), var(--brand-cyan));
}
.tier-item:nth-child(3) .tier-progress-bar {
  background: linear-gradient(90deg, var(--brand-cyan), var(--brand-purple));
}
/* ========== Preview ========== */
.preview-section {
  background: var(--bg-secondary);
}
.preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.preview-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}
.preview-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47,107,255,0.3);
  box-shadow: var(--shadow-card);
}
.preview-cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.preview-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.preview-lock {
  position: absolute;
  inset: 0;
  background: rgba(13,19,34,0.65);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: opacity 0.3s;
}
.preview-lock i {
  font-size: 1.5rem;
  color: rgba(255,255,255,0.8);
}
.preview-lock span {
  font-size: 0.8125rem;
  color: var(--text-body);
  font-weight: 500;
}
.preview-lock .unlock-btn {
  margin-top: 4px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(47,107,255,0.3);
  transition: all 0.3s;
}
.preview-lock .unlock-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(47,107,255,0.45);
}
.preview-card:hover .preview-lock {
  opacity: 0.9;
}
.preview-body {
  padding: 16px;
}
.preview-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.preview-body .preview-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}
/* ========== FAQ ========== */
.faq-section {
  background: var(--bg-primary);
}
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 0 4px;
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.3s;
}
.faq-question:hover {
  color: var(--brand-cyan);
}
.faq-question:focus-visible {
  outline: 3px solid rgba(47,107,255,0.5);
  outline-offset: -2px;
  border-radius: 8px;
}
.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--brand-cyan);
  flex-shrink: 0;
  transition: all 0.3s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(47,107,255,0.2);
  border-color: rgba(47,107,255,0.4);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer-inner {
  padding: 0 42px 22px 8px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
/* ========== News ========== */
.news-section {
  background: var(--bg-secondary);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  display: block;
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47,107,255,0.3);
  box-shadow: var(--shadow-card);
}
.news-card-cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.news-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-card-cover img {
  transform: scale(1.05);
}
.news-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
}
.news-card-body {
  padding: 20px;
}
.news-card-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-body p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.news-meta .news-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.news-meta .news-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--brand-cyan);
  transition: color 0.3s;
}
.news-card:hover .news-meta .news-link {
  color: var(--brand-blue);
}
.view-more-wrap {
  text-align: center;
  margin-top: 40px;
}
/* ========== CTA ========== */
.cta-section {
  background: var(--bg-primary);
}
.cta-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  background: linear-gradient(135deg, rgba(47,107,255,0.2), rgba(124,108,255,0.1), rgba(34,211,238,0.08));
  border: 1px solid rgba(47,107,255,0.3);
  box-shadow: var(--shadow-glass);
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  bottom: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(47,107,255,0.25), transparent 70%);
  pointer-events: none;
}
.cta-card h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  position: relative;
}
.cta-card p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  position: relative;
  flex-wrap: wrap;
}
.cta-guarantee {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 36px;
  flex-wrap: wrap;
  position: relative;
}
.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-body);
}
.guarantee-item i {
  color: var(--success);
  font-size: 0.9375rem;
}
/* ========== Footer ========== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.footer-brand .footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .footer-logo i {
  color: var(--brand-blue);
  font-size: 1.375rem;
}
.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.3s, padding-left 0.3s;
}
.footer-col ul li a:hover {
  color: var(--brand-cyan);
  padding-left: 4px;
}
.footer-subscribe p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}
.footer-subscribe-form {
  display: flex;
  gap: 8px;
}
.footer-subscribe-form input {
  flex: 1;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.footer-subscribe-form input::placeholder {
  color: var(--text-muted);
}
.footer-subscribe-form input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.15);
}
.footer-subscribe-form button {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.3s;
}
.footer-subscribe-form button:hover {
  box-shadow: var(--shadow-glow);
}
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom .footer-social {
  display: flex;
  gap: 12px;
}
.footer-bottom .footer-social a {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: all 0.3s;
}
.footer-bottom .footer-social a:hover {
  color: var(--brand-cyan);
  border-color: rgba(34,211,238,0.4);
  background: rgba(34,211,238,0.08);
}
/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.25rem; }
  .hero-inner { gap: 32px; }
  .preview-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .nav-links { display: none; }
  .nav-search { display: none; }
  .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .hero { padding: 48px 0 64px; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero-text { text-align: center; }
  .hero-badges { justify-content: center; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-window { max-width: 480px; margin: 0 auto; width: 100%; }
  .compare-grid { flex-direction: column; gap: 24px; }
  .compare-col { padding: 24px; }
  .tier-list { padding-left: 36px; }
  .tier-list::before { left: 14px; }
  .tier-item::before { left: -28px; width: 10px; height: 10px; }
  .tier-item { padding: 24px 20px; }
  .tier-item:hover { transform: none; }
  .preview-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 1.5rem; }
  .cta-guarantee { gap: 16px; }
  .section-head h2 { font-size: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .preview-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.75rem; }
  .hero-subtitle { font-size: 0.9375rem; }
  .btn-large { padding: 14px 32px; font-size: 0.9375rem; }
  .section { --space-section: 48px; }
  .section-head { margin-bottom: 32px; }
  .tier-list { padding-left: 28px; }
  .tier-list::before { left: 10px; }
  .tier-item::before { left: -20px; }
  .compare-item { flex-wrap: wrap; }
  .compare-item .item-value { width: 100%; text-align: left; padding-left: 36px; }
  .cta-guarantee { gap: 12px; flex-direction: column; align-items: center; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --bg-primary: #0D1322;
  --bg-secondary: #121A2B;
  --bg-deep: #080D18;
  --brand-blue: #2F6BFF;
  --accent-cyan: #22D3EE;
  --accent-violet: #7C6CFF;
  --success-green: #34D399;
  --warning-amber: #F59E0B;
  --text-primary: #EDF2F9;
  --text-body: #C5D0E0;
  --text-secondary: #8C9BB0;
  --text-muted: #5B6B82;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --nav-text: #1A2233;
  --nav-border: #E7EBF2;
  --white: #FFFFFF;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0,0,0,0.2);
  --shadow-glass: 0 20px 45px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 0 1px rgba(47,107,255,0.4), 0 8px 30px rgba(47,107,255,0.35);
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-section: 100px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--brand-blue); transition: color .2s ease; }
a:hover { color: var(--accent-cyan); }
ul, ol { list-style: none; margin: 0; padding: 0; }
input, button, textarea { font-family: inherit; }
a:focus, button:focus, input:focus { outline: 2px solid rgba(47,107,255,0.6); outline-offset: 2px; }

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.row { max-width: 1200px; margin-left: auto; margin-right: auto; }
.columns { padding-left: 20px; padding-right: 20px; }

/* ===== 导航 ===== */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  flex-wrap: wrap;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nav-text);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.brand-logo i { color: var(--brand-blue); font-size: 1.5rem; }
.brand-logo:hover { color: var(--nav-text); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 18px;
  color: var(--nav-text);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: 8px;
  transition: all .2s ease;
  position: relative;
}
.nav-links a:hover { background: #F0F3FA; color: var(--brand-blue); }
.nav-links a.active { color: var(--brand-blue); font-weight: 600; }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 2px;
  height: 2px;
  background: var(--brand-blue);
  border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-search {
  display: flex;
  align-items: center;
  background: #F5F7FA;
  border: 1px solid #E7EBF2;
  border-radius: var(--radius-pill);
  padding: 0 14px;
  height: 40px;
  transition: border-color .2s, box-shadow .2s;
}
.header-search:focus-within {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.15);
}
.header-search i { color: #8C9BB0; font-size: 0.875rem; margin-right: 8px; }
.header-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.875rem;
  width: 140px;
  color: var(--nav-text);
  transition: width .2s;
}
.header-search input::placeholder { color: #9AA7B8; }
.header-search input:focus { width: 180px; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--brand-blue), #1e50d6);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all .3s ease;
  box-shadow: 0 4px 14px rgba(47,107,255,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}
.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--nav-text);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  line-height: 1;
}
.nav-toggle:hover { background: #F0F3FA; }

/* ===== 分类页 Hero ===== */
.category-hero {
  position: relative;
  min-height: 44vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 30%;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,19,34,0.97) 0%, rgba(18,26,43,0.88) 45%, rgba(47,107,255,0.35) 100%);
}
.category-hero-inner { position: relative; z-index: 2; }
.hero-breadcrumb {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-breadcrumb a { color: var(--accent-cyan); }
.hero-breadcrumb i { font-size: 0.75rem; color: var(--text-muted); }
.category-hero h1 {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin-bottom: 18px;
  max-width: 700px;
}
.hero-desc {
  font-size: 1.0625rem;
  color: var(--text-body);
  max-width: 560px;
  line-height: 1.8;
}

/* ===== 统计数据条 ===== */
.stats-bar {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 32px 0;
}
.stats-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.stat-item { text-align: center; flex: 1; }
.stat-item strong {
  display: block;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--brand-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item span {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 4px;
}

/* ===== 主体区域 ===== */
.category-main { padding: var(--space-section) 0; }
.section-heading { margin-bottom: 40px; }
.section-heading h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}
.section-heading p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  max-width: 520px;
}

/* ===== 水平图文信息卡 ===== */
.post-card-horizontal {
  display: flex;
  gap: 22px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 22px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
  box-shadow: var(--shadow-card);
}
.post-card-horizontal:hover {
  transform: translateY(-4px);
  border-color: rgba(47,107,255,0.4);
  box-shadow: var(--shadow-glass);
}
.post-thumb {
  flex: 0 0 200px;
  width: 200px;
  height: 150px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  background: var(--bg-deep);
}
.post-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-card-horizontal:hover .post-thumb img { transform: scale(1.05); }
.post-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(47,107,255,0.9);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
}
.post-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.post-meta {
  display: flex;
  gap: 14px;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  margin-bottom: 8px;
  align-items: center;
}
.post-meta .post-date i { margin-right: 4px; color: var(--text-muted); }
.post-meta .post-read i { margin-right: 4px; color: var(--text-muted); }
.post-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.post-body h3 a { color: inherit; transition: color .2s; }
.post-body h3 a:hover { color: var(--accent-cyan); }
.post-body p {
  color: var(--text-body);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-link {
  color: var(--accent-cyan);
  font-weight: 500;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s;
}
.post-link i { transition: transform .2s; }
.post-link:hover { color: var(--brand-blue); }
.post-link:hover i { transform: translateX(4px); }

/* ===== 右侧 Widget ===== */
.widget {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  margin-bottom: 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}
.widget h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.widget h4 i { color: var(--brand-blue); font-size: 0.9375rem; }
.widget-categories li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.07);
  transition: padding-left .2s;
}
.widget-categories li:last-child { border-bottom: none; }
.widget-categories li:hover { padding-left: 6px; }
.widget-categories a { color: var(--text-body); font-size: 0.9375rem; font-weight: 500; }
.widget-categories a:hover { color: var(--accent-cyan); }
.widget-categories span {
  color: var(--text-muted);
  font-size: 0.75rem;
  background: rgba(255,255,255,0.06);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,0.06);
}
.tags-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tags-cloud a {
  color: var(--text-body);
  font-size: 0.8125rem;
  padding: 6px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-pill);
  transition: all .2s ease;
}
.tags-cloud a:hover {
  color: #fff;
  background: rgba(47,107,255,0.5);
  border-color: rgba(124,108,255,0.6);
  transform: translateY(-1px);
}
.popular-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.07);
}
.popular-list li:last-child { border-bottom: none; }
.popular-list .num {
  color: var(--warning-amber);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.6;
  min-width: 24px;
}
.popular-list a {
  color: var(--text-body);
  font-size: 0.875rem;
  line-height: 1.55;
  transition: color .2s;
}
.popular-list a:hover { color: var(--accent-cyan); }

/* ===== 次 CTA ===== */
.category-cta { padding: 0 0 var(--space-section); }
.cta-inner {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 56px 60px;
  text-align: center;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glass);
}
.cta-inner::before {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 420px;
  height: 160px;
  background: radial-gradient(ellipse, rgba(47,107,255,0.25), transparent 70%);
  pointer-events: none;
}
.cta-inner::after {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(34,211,238,0.1), transparent 70%);
  pointer-events: none;
}
.cta-inner h2 {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}
.cta-inner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  background: linear-gradient(135deg, var(--brand-blue), var(--accent-violet));
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all .3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(80,80,255,0.25);
}
.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all .3s ease;
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  color: var(--text-secondary);
  padding-top: 70px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 44px;
  padding-bottom: 50px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.footer-logo i { color: var(--brand-blue); font-size: 1.4rem; }
.footer-brand p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 14px;
  max-width: 320px;
  font-size: 0.875rem;
}
.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: var(--accent-cyan);
  padding-left: 4px;
}
.footer-subscribe p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 14px;
}
.footer-subscribe-form { display: flex; }
.footer-subscribe-form input {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  outline: none;
  font-size: 0.875rem;
  transition: border-color .2s, box-shadow .2s;
}
.footer-subscribe-form input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.15);
}
.footer-subscribe-form button {
  padding: 10px 22px;
  background: var(--brand-blue);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background .2s;
}
.footer-subscribe-form button:hover { background: #1e50d6; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-social { display: flex; gap: 18px; }
.footer-social a {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: color .2s, transform .2s;
}
.footer-social a:hover {
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  :root { --space-section: 80px; }
  .category-hero h1 { font-size: 2.2rem; }
  .post-thumb { flex: 0 0 160px; width: 160px; height: 130px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .stats-grid { flex-wrap: wrap; }
  .stat-item { min-width: 120px; }
}

@media (max-width: 768px) {
  .header-search { display: none; }
  .post-card-horizontal { flex-direction: column; }
  .post-thumb { flex: 0 0 auto; width: 100%; height: 180px; }
  .category-cta .cta-inner { padding: 44px 30px; }
}

@media (max-width: 640px) {
  :root { --space-section: 60px; }
  .site-header { position: sticky; }
  .header-inner { min-height: 60px; padding: 10px 0; }
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--white);
    border-top: 1px solid var(--nav-border);
    margin-top: 10px;
    padding: 12px 0;
    gap: 4px;
  }
  .nav-links.show { display: flex; }
  .nav-links a { padding: 12px 16px; border-radius: 8px; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: #F0F3FA; }
  .header-actions {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 12px 0;
    gap: 10px;
  }
  .header-actions.show { display: flex; }
  .btn-primary.btn-sm { width: 100%; text-align: center; }
  .nav-toggle { display: block; }
  .category-hero { min-height: auto; padding: 56px 0; }
  .category-hero h1 { font-size: 1.7rem; }
  .hero-desc { font-size: 0.9375rem; }
  .stats-bar { padding: 24px 0; }
  .stats-grid { gap: 16px; }
  .stat-item { min-width: calc(50% - 16px); }
  .stat-item strong { font-size: 1.4rem; }
  .section-heading h2 { font-size: 1.4rem; }
  .post-card-horizontal { padding: 12px; }
  .post-thumb { height: 160px; }
  .cta-inner { padding: 36px 20px; }
  .cta-inner h2 { font-size: 1.25rem; }
  .cta-actions { flex-direction: column; }
  .btn-secondary, .btn-ghost { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --bg-dark: #0D1322;
            --bg-deep: #121A2B;
            --bg-header: #FFFFFF;
            --bg-card: rgba(255, 255, 255, 0.05);
            --border-card: rgba(255, 255, 255, 0.1);
            --border-glass: rgba(255, 255, 255, 0.12);
            --blue: #2F6BFF;
            --cyan: #22D3EE;
            --purple: #7C6CFF;
            --green: #34D399;
            --amber: #F59E0B;
            --text-main: #EDF2F9;
            --text-body: #C5D0E0;
            --text-sub: #8C9BB0;
            --text-mute: #5B6B82;
            --nav-text: #1A2233;
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.2);
            --shadow-glow: 0 8px 30px rgba(47, 107, 255, 0.35);
            --transition: all .25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            letter-spacing: 0.01em;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        ul, ol { list-style: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
        input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header / 导航 ===== */
        .site-header {
            background: var(--bg-header);
            border-bottom: 1px solid #E7EBF2;
            box-shadow: 0 2px 12px rgba(26, 34, 51, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 72px;
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--nav-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .brand i {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(47, 107, 255, 0.3);
        }
        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a {
            color: var(--nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0; bottom: 0;
            width: 0; height: 2px;
            background: linear-gradient(90deg, var(--blue), var(--cyan));
            border-radius: 2px;
            transition: width .3s;
        }
        .nav-links a:hover { color: var(--blue); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--blue); }
        .nav-links a.active::after { width: 100%; }
        .header-actions { display: flex; align-items: center; gap: 16px; }
        .header-search {
            display: flex;
            align-items: center;
            background: #F4F6FA;
            border: 1px solid #E7EBF2;
            border-radius: 999px;
            padding: 8px 16px;
            gap: 8px;
            transition: var(--transition);
        }
        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.875rem;
            color: var(--nav-text);
            width: 140px;
        }
        .header-search input::placeholder { color: var(--text-sub); }
        .header-search i { color: var(--text-sub); font-size: 0.8rem; }
        .header-search:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15); }
        .btn-nav {
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            font-weight: 600;
            font-size: 0.875rem;
            padding: 10px 20px;
            border-radius: 12px;
            box-shadow: 0 4px 16px rgba(47, 107, 255, 0.3);
            transition: var(--transition);
        }
        .btn-nav:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(47, 107, 255, 0.45); }
        .menu-toggle { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 10px; background: #F4F6FA; color: var(--nav-text); font-size: 1.1rem; }

        /* ===== 文章头部 ===== */
        .article-header {
            position: relative;
            padding: 56px 0 48px;
            background:
                linear-gradient(135deg, rgba(13, 19, 34, 0.96) 0%, rgba(18, 26, 43, 0.9) 60%, rgba(20, 30, 54, 0.84) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-sub);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-sub); transition: var(--transition); }
        .breadcrumb a:hover { color: var(--blue); }
        .breadcrumb .sep { color: var(--text-mute); }
        .breadcrumb .current { color: #A8C0FF; max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .article-title {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
            max-width: 900px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .article-meta { display: flex; align-items: center; gap: 24px; font-size: 0.875rem; color: var(--text-sub); flex-wrap: wrap; }
        .article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
        .article-meta .meta-item i { color: var(--blue); font-size: 0.85rem; }
        .article-meta .category-badge {
            background: rgba(47, 107, 255, 0.18);
            border: 1px solid rgba(47, 107, 255, 0.35);
            color: #A8C0FF;
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 0.8rem;
        }

        /* ===== 文章主区 ===== */
        .article-main {
            padding: 56px 0 80px;
            background:
                radial-gradient(ellipse at 20% 0%, rgba(47, 107, 255, 0.08) 0%, transparent 55%),
                var(--bg-dark);
        }
        .article-main .row { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .article-main .columns { padding: 0 12px; }
        .article-body-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
        }
        .cms-content { font-size: 1rem; line-height: 1.8; color: var(--text-body); }
        .cms-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 40px 0 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .cms-content h3 { font-size: 1.25rem; font-weight: 600; color: var(--text-main); margin: 32px 0 12px; }
        .cms-content h4 { font-size: 1.1rem; font-weight: 600; color: var(--text-main); margin: 24px 0 10px; }
        .cms-content p { margin-bottom: 24px; letter-spacing: 0.01em; }
        .cms-content a { color: #6FA0FF; border-bottom: 1px solid rgba(47, 107, 255, 0.4); }
        .cms-content a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
        .cms-content img { border-radius: 12px; margin: 24px auto; box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3); }
        .cms-content figure { margin: 24px 0; text-align: center; }
        .cms-content figcaption { text-align: center; color: var(--text-sub); font-size: 0.85rem; margin-top: 8px; }
        .cms-content blockquote {
            border-left: 4px solid var(--blue);
            background: rgba(47, 107, 255, 0.08);
            padding: 16px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: #A8C0FF;
        }
        .cms-content ul, .cms-content ol { margin: 0 0 24px 24px; padding: 0; }
        .cms-content ul { list-style: disc; }
        .cms-content ol { list-style: decimal; }
        .cms-content li { margin-bottom: 8px; }
        .cms-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.9rem; }
        .cms-content th { background: rgba(47, 107, 255, 0.15); color: var(--text-main); text-align: left; padding: 12px 16px; border: 1px solid rgba(255, 255, 255, 0.1); }
        .cms-content td { padding: 12px 16px; border: 1px solid rgba(255, 255, 255, 0.08); }
        .cms-content code { background: rgba(0, 0, 0, 0.3); color: var(--cyan); padding: 2px 8px; border-radius: 6px; font-size: 0.9em; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
        .cms-content pre { background: rgba(0, 0, 0, 0.4); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 20px; overflow-x: auto; margin: 24px 0; }
        .cms-content pre code { background: none; padding: 0; color: var(--text-body); }
        .cms-content hr { border: none; border-top: 1px solid rgba(255, 255, 255, 0.1); margin: 40px 0; }

        /* ===== 标签区 ===== */
        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .tag-label { color: var(--text-sub); font-size: 0.875rem; display: flex; align-items: center; gap: 6px; }
        .tag-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--text-body);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .tag-item:hover { border-color: var(--blue); color: #6FA0FF; background: rgba(47, 107, 255, 0.1); }

        /* ===== 上一篇 / 下一篇 ===== */
        .post-pagination {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            flex-wrap: wrap;
        }
        .pagination-link {
            flex: 1;
            min-width: 200px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 18px 24px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .pagination-link:hover { border-color: rgba(47, 107, 255, 0.5); background: rgba(47, 107, 255, 0.08); transform: translateY(-3px); }
        .pagination-link .p-label { font-size: 0.8rem; color: var(--text-sub); display: flex; align-items: center; gap: 8px; }
        .pagination-link .p-label i { color: var(--blue); }
        .pagination-link .p-title { font-size: 0.95rem; color: var(--text-main); font-weight: 500; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .pagination-link.next { text-align: right; }
        .pagination-link.next .p-label { justify-content: flex-end; }
        .pagination-link.next .p-title { color: #A8C0FF; }
        .pagination-spacer { flex: 1; min-width: 200px; }
        .back-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-sub);
            font-size: 0.9rem;
            margin-top: 24px;
            transition: var(--transition);
            padding: 8px 16px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .back-btn:hover { color: #6FA0FF; border-color: rgba(47, 107, 255, 0.4); transform: translateX(-4px); }

        /* ===== 侧栏 ===== */
        .sidebar-inner { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 24px; }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(12px);
        }
        .sidebar-card h4 {
            font-size: 1.05rem;
            color: var(--text-main);
            font-weight: 600;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i { color: var(--blue); }
        .latest-list li { padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
        .latest-list li:last-child { border-bottom: none; }
        .latest-list a { color: var(--text-body); font-size: 0.9rem; line-height: 1.5; display: block; transition: var(--transition); }
        .latest-list a:hover { color: #6FA0FF; padding-left: 4px; }
        .latest-list .item-date { font-size: 0.75rem; color: var(--text-mute); margin-top: 4px; display: block; }
        .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag-cloud a {
            background: rgba(47, 107, 255, 0.12);
            border: 1px solid rgba(47, 107, 255, 0.25);
            border-radius: 999px;
            color: #A8C0FF;
            font-size: 0.8rem;
            padding: 5px 14px;
            transition: var(--transition);
        }
        .tag-cloud a:hover { background: rgba(47, 107, 255, 0.25); transform: translateY(-2px); }
        .about-card p { font-size: 0.875rem; color: var(--text-body); margin-bottom: 16px; line-height: 1.7; }
        .about-card .about-mark { color: var(--purple); }
        .btn-outline {
            display: inline-block;
            border: 1px solid rgba(47, 107, 255, 0.5);
            color: #6FA0FF;
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .btn-outline:hover { background: rgba(47, 107, 255, 0.15); color: #A8C0FF; }

        /* ===== 空状态 ===== */
        .not-found { text-align: center; padding: 80px 20px; background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius-lg); max-width: 640px; margin: 0 auto; }
        .not-found i { font-size: 3rem; color: var(--blue); margin-bottom: 20px; }
        .not-found h2 { font-size: 1.5rem; color: var(--text-main); margin-bottom: 12px; }
        .not-found p { color: var(--text-sub); margin-bottom: 24px; }
        .btn-primary-solid {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 12px 28px;
            border-radius: 12px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
        }
        .btn-primary-solid:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(47, 107, 255, 0.5); color: #fff; }

        /* ===== 相关推荐 ===== */
        .related-section { padding: 64px 0 80px; background: var(--bg-deep); border-top: 1px solid rgba(255, 255, 255, 0.06); }
        .related-section .section-title { font-size: 1.6rem; color: var(--text-main); font-weight: 700; margin-bottom: 32px; display: flex; align-items: center; gap: 12px; }
        .related-section .section-title i { color: var(--blue); }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .related-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-6px); border-color: rgba(47, 107, 255, 0.4); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); }
        .related-card .related-img { width: 100%; height: 160px; object-fit: cover; }
        .related-body { padding: 16px 20px 20px; }
        .related-body h4 { font-size: 0.95rem; font-weight: 600; line-height: 1.5; color: var(--text-main); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-body h4 a { color: inherit; }
        .related-body h4 a:hover { color: #6FA0FF; }
        .related-date { font-size: 0.8rem; color: var(--text-mute); display: flex; align-items: center; gap: 6px; }
        .related-date i { color: var(--blue); font-size: 0.75rem; }

        /* ===== 底部 CTA ===== */
        .article-cta { padding: 40px 0 0; }
        .article-cta .cta-box {
            background: linear-gradient(135deg, rgba(47, 107, 255, 0.12) 0%, rgba(34, 211, 238, 0.08) 100%);
            border: 1px solid rgba(47, 107, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 32px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .article-cta .cta-box h3 { font-size: 1.25rem; color: var(--text-main); font-weight: 600; margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
        .article-cta .cta-box h3 i { color: var(--cyan); }
        .article-cta .cta-box p { font-size: 0.875rem; color: var(--text-sub); }

        /* ===== 页脚 ===== */
        .site-footer { background: #0A0F1C; border-top: 1px solid rgba(255, 255, 255, 0.06); padding: 64px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 48px; }
        .footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700; color: var(--text-main); margin-bottom: 16px; }
        .footer-logo i { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--blue), var(--cyan)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; }
        .footer-brand p { font-size: 0.875rem; color: var(--text-sub); line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: var(--text-main); font-size: 0.95rem; font-weight: 600; margin-bottom: 18px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { color: var(--text-sub); font-size: 0.875rem; transition: var(--transition); }
        .footer-col ul a:hover { color: #6FA0FF; padding-left: 4px; }
        .footer-subscribe p { font-size: 0.8rem; color: var(--text-sub); margin-bottom: 12px; line-height: 1.6; }
        .footer-subscribe-form { display: flex; gap: 8px; }
        .footer-subscribe-form input {
            flex: 1;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 10px 14px;
            color: var(--text-main);
            font-size: 0.85rem;
            outline: none;
            transition: border-color .2s;
        }
        .footer-subscribe-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15); }
        .footer-subscribe-form input::placeholder { color: var(--text-mute); }
        .footer-subscribe-form button {
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            border-radius: 10px;
            padding: 10px 18px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .footer-subscribe-form button:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(47, 107, 255, 0.4); }
        .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.06); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--text-mute); flex-wrap: wrap; gap: 12px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 36px; height: 36px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-sub);
            transition: var(--transition);
        }
        .footer-social a:hover { color: #6FA0FF; border-color: var(--blue); transform: translateY(-3px); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
                border-bottom: 1px solid #E7EBF2;
                transform: translateY(-120%);
                transition: transform .3s;
                z-index: 999;
            }
            .nav-links.open { transform: translateY(0); }
            .nav-links a { display: block; padding: 12px 0; font-size: 1rem; border-bottom: 1px solid #F4F6FA; width: 100%; }
            .nav-links a::after { display: none; }
            .menu-toggle { display: flex; }
            .header-search input { width: 100px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-body-card { padding: 28px; }
        }
        @media (max-width: 768px) {
            .site-header { height: 64px; }
            .article-title { font-size: 1.8rem; }
            .article-main .row { padding: 0 16px; }
            .sidebar-inner { position: static; margin-top: 32px; }
            .article-main .columns { padding: 0 16px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-cta .cta-box { padding: 24px; }
        }
        @media (max-width: 640px) {
            .header-actions .btn-nav { display: none; }
            .site-header .container { padding: 0 16px; }
            .brand { font-size: 1.1rem; }
            .article-header { padding: 36px 0 32px; }
            .article-main { padding: 40px 0 56px; }
            .post-pagination { flex-direction: column; }
            .pagination-link { min-width: auto; }
            .article-body-card { padding: 20px; }
            .related-section { padding: 48px 0 56px; }
            .footer-grid { padding-bottom: 32px; }
            .header-search { display: none; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-meta { gap: 12px; font-size: 0.8rem; }
            .breadcrumb .current { max-width: 200px; }
            .article-title { font-size: 1.5rem; }
            .cms-content h2 { font-size: 1.3rem; }
            .cms-content h3 { font-size: 1.15rem; }
            .article-cta .cta-box h3 { font-size: 1.1rem; }
        }