/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --bg-primary: #081120;
  --bg-secondary: #0a1428;
  --bg-tertiary: #101d36;
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.09);
  --border-glass-hover: rgba(255, 255, 255, 0.2);
  --primary: #2f6bff;
  --secondary: #19c8d2;
  --accent: #f5a524;
  --text-primary: #e8edf7;
  --text-secondary: #9aa7bd;
  --text-muted: #6b7a93;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow-glow: 0 0 24px rgba(47, 107, 255, 0.45);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Helvetica Neue', Arial, sans-serif;
  --transition-base: all 0.25s ease;
  --section-padding: 88px;
}

/* ========== 基础 Reset ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image:
    linear-gradient(rgba(47, 107, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}
a:hover {
  color: var(--secondary);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}
p {
  margin: 0 0 1em;
  color: var(--text-secondary);
}
:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
  border-radius: 4px;
}
::selection {
  background: rgba(47, 107, 255, 0.4);
  color: #fff;
}

/* ========== 通用容器与间距 ========== */
.container {
  max-width: 1320px;
  padding-left: 24px;
  padding-right: 24px;
}
@media (max-width: 575.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ========== 按钮系统 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-base);
  min-height: 44px;
  letter-spacing: 0.01em;
}
.btn i {
  font-size: 14px;
}
.btn-primary {
  background: linear-gradient(135deg, #2f6bff, #19c8d2);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3d7eff, #2bd5de);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(47, 107, 255, 0.6);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 16px rgba(47, 107, 255, 0.4);
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--secondary);
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, #f5a524, #ffc75e);
  color: #1a1408;
  box-shadow: 0 0 20px rgba(245, 165, 36, 0.3);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(245, 165, 36, 0.45);
  color: #1a1408;
  background: linear-gradient(135deg, #ffb638, #ffd377);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
  min-height: 36px;
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: 16px 38px;
  font-size: 17px;
  min-height: 52px;
  border-radius: var(--radius-lg);
}
.text-link {
  color: var(--secondary);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.text-link i {
  transition: transform 0.2s ease;
}
.text-link:hover i {
  transform: translateX(4px);
}

/* ========== 标签 / 徽章 ========== */
.badge-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(25, 200, 210, 0.14);
  color: var(--secondary);
  border: 1px solid rgba(25, 200, 210, 0.28);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-accent {
  background: rgba(245, 165, 36, 0.15);
  color: var(--accent);
  border-color: rgba(245, 165, 36, 0.3);
}
.badge-primary {
  background: rgba(47, 107, 255, 0.15);
  color: #6ea0ff;
  border-color: rgba(47, 107, 255, 0.3);
}
.badge-light {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.12);
}

/* ========== Header / 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(8, 17, 32, 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 ease, border-color 0.3s ease, box-shadow 0.3s ease;
  padding: 14px 0;
}
.site-header.scrolled {
  background: rgba(6, 12, 24, 0.94);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #fff, #c8d6f0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.logo:hover {
  -webkit-text-fill-color: var(--secondary);
}
.logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--secondary);
  box-shadow: 0 0 12px rgba(25, 200, 210, 0.8);
  display: inline-block;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid transparent;
  transition: var(--transition-base);
  position: relative;
  white-space: nowrap;
}
.nav-chip:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}
.nav-chip.active {
  background: var(--bg-glass);
  border-color: rgba(25, 200, 210, 0.35);
  color: var(--text-primary);
  box-shadow: inset 0 0 20px rgba(25, 200, 210, 0.06);
}
.nav-chip.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--secondary);
  box-shadow: 0 0 10px rgba(25, 200, 210, 0.6);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition-base);
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}
@media (max-width: 991.98px) {
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 70px;
    left: 16px;
    right: 16px;
    background: rgba(8, 17, 32, 0.97);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    display: none;
    z-index: 999;
    box-shadow: var(--shadow-card);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-chip {
    justify-content: center;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
  }
  .nav-chip.active {
    background: rgba(25, 200, 210, 0.12);
  }
  .nav-chip.active::after {
    display: none;
  }
  .header-actions .btn {
    display: none;
  }
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 17, 32, 0.55) 0%, rgba(8, 17, 32, 0.82) 55%, var(--bg-primary) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  text-align: center;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(25, 200, 210, 0.16);
  border: 1px solid rgba(25, 200, 210, 0.35);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero h1 {
  font-size: 56px;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  font-weight: 800;
  background: linear-gradient(120deg, #fff 40%, #bcd0ff 80%, #7fdbe0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 19px;
  line-height: 1.7;
  color: rgba(232, 237, 247, 0.8);
  margin-bottom: 32px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-scroll-link {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 12px;
  transition: var(--transition-base);
}
.hero-scroll-link:hover {
  color: var(--secondary);
}
.hero-scroll-link i {
  font-size: 16px;
  animation: floatDown 2s infinite;
}
@keyframes floatDown {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(6px);
  }
}
@media (max-width: 767.98px) {
  .hero {
    min-height: 80vh;
    padding: 110px 0 60px;
  }
  .hero h1 {
    font-size: 32px;
    line-height: 1.3;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .hero-actions .btn {
    width: 100%;
  }
}

/* ========== 板块通用 ========== */
.section-block {
  padding: var(--section-padding) 0;
  position: relative;
}
.section-header {
  max-width: 720px;
  margin-bottom: 48px;
}
.section-header.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(47, 107, 255, 0.12);
  border: 1px solid rgba(47, 107, 255, 0.25);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 34px;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
}
@media (max-width: 767.98px) {
  .section-block {
    padding: 56px 0;
  }
  .section-header h2 {
    font-size: 26px;
  }
}

/* ========== 合集目录 ========== */
.catalog-section {
  padding: 88px 0;
}
.catalog-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}
.catalog-grid-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.catalog-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 32px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  position: relative;
  transition: var(--transition-base);
  overflow: hidden;
}
.catalog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
}
.catalog-card:hover {
  transform: translateY(-4px);
  background: var(--bg-glass-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card-hover);
}
.catalog-card-primary {
  background: linear-gradient(145deg, rgba(47, 107, 255, 0.12), rgba(25, 200, 210, 0.06));
  border-color: rgba(47, 107, 255, 0.3);
  justify-content: center;
  min-height: 100%;
}
.catalog-card-primary::before {
  background: linear-gradient(90deg, transparent, rgba(47, 107, 255, 0.6), transparent);
}
.catalog-card-primary .card-icon {
  width: 64px;
  height: 64px;
  background: rgba(47, 107, 255, 0.2);
  color: var(--primary);
}
.card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(25, 200, 210, 0.13);
  color: var(--secondary);
  font-size: 22px;
  margin-bottom: 8px;
}
.catalog-card h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.catalog-card p {
  font-size: 15px;
  margin-bottom: 16px;
  flex-grow: 1;
}
@media (max-width: 991.98px) {
  .catalog-grid {
    grid-template-columns: 1fr;
  }
  .catalog-grid-side {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 575.98px) {
  .catalog-grid-side {
    grid-template-columns: 1fr;
  }
  .catalog-card {
    padding: 24px;
  }
}

/* ========== 数据统计 ========== */
.stats-section {
  padding: 56px 0;
  background: linear-gradient(180deg, transparent, rgba(8, 17, 32, 0.7), transparent);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 24px 12px;
}
.stat-number {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}
@media (max-width: 767.98px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-number {
    font-size: 30px;
  }
}

/* ========== 精选条目 ========== */
.featured-section {
  padding: 88px 0;
}
.featured-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  transition: var(--transition-base);
  height: 100%;
  position: relative;
}
.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  z-index: 2;
}
.featured-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-card-hover);
}
.featured-card-img {
  position: relative;
  height: 180px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
}
.featured-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.featured-card:hover .featured-card-img img {
  transform: scale(1.05);
}
.featured-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 17, 32, 0) 40%, rgba(8, 17, 32, 0.55) 100%);
}
.featured-card-category {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}
.featured-card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.featured-card-body h4 {
  font-size: 17px;
  margin-bottom: 10px;
  transition: color 0.2s ease;
  color: var(--text-primary);
}
.featured-card-body h4:hover {
  color: var(--secondary);
}
.featured-card-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}
.featured-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  margin-top: auto;
}

/* ========== 最新信息 ========== */
.news-section {
  padding: 88px 0;
  background: linear-gradient(180deg, transparent, rgba(8, 17, 32, 0.5), transparent);
}
.news-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.news-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
  display: block;
  position: relative;
}
.news-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(25, 200, 210, 0.5), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-card);
}
.news-card:hover::before {
  opacity: 1;
}
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.news-date {
  font-size: 13px;
  color: var(--text-muted);
}
.news-card h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.news-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.6;
}
.news-card .news-more {
  font-size: 13px;
  color: var(--secondary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-glass);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-size: 15px;
}
@media (max-width: 767.98px) {
  .news-list {
    grid-template-columns: 1fr;
  }
}

/* ========== 相关推荐 ========== */
.recommend-section {
  padding: 88px 0;
}
.recommend-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.recommend-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(16px);
  transition: var(--transition-base);
}
.recommend-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card-hover);
}
.recommend-card-img {
  height: 140px;
  overflow: hidden;
}
.recommend-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.recommend-card:hover .recommend-card-img img {
  transform: scale(1.05);
}
.recommend-card-body {
  padding: 20px;
}
.recommend-card-body h4 {
  font-size: 16px;
  margin-bottom: 8px;
}
.recommend-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}
@media (max-width: 991.98px) {
  .recommend-scroll {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 575.98px) {
  .recommend-scroll {
    grid-template-columns: 1fr;
  }
}

/* ========== FAQ ========== */
.faq-section {
  padding: 88px 0;
  background: linear-gradient(180deg, transparent, rgba(8, 17, 32, 0.5), transparent);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
}
.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.18);
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  transition: var(--transition-base);
}
.faq-question::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--secondary);
  font-size: 16px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.faq-item.open {
  border-color: rgba(25, 200, 210, 0.25);
  background: rgba(25, 200, 210, 0.04);
}

/* ========== CTA 板块 ========== */
.cta-section {
  padding: 88px 0 112px;
}
.cta-card {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 48px;
  background: linear-gradient(145deg, rgba(47, 107, 255, 0.15), rgba(25, 200, 210, 0.08));
  border: 1px solid rgba(47, 107, 255, 0.3);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #2f6bff, #19c8d2, transparent);
}
.cta-card h2 {
  font-size: 30px;
  margin-bottom: 16px;
}
.cta-card p {
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 32px;
  color: var(--text-secondary);
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
@media (max-width: 767.98px) {
  .cta-card {
    padding: 36px 20px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
  .cta-actions .btn {
    width: 100%;
  }
}

/* ========== Footer ========== */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 72px 0 0;
  background: linear-gradient(180deg, transparent, rgba(6, 10, 20, 0.6));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand h3 {
  font-size: 24px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff, #80a0ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
.footer-brand p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 340px;
  line-height: 1.7;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition-base);
}
.footer-links a:hover {
  color: var(--secondary);
  transform: translateX(4px);
}
.footer-contact p {
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
@media (max-width: 991.98px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 767.98px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ========== 动画辅助 ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(47, 107, 255, 0.35);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(47, 107, 255, 0.6);
}

/* ========== Bootstrap 覆盖 ========== */
.accordion-button:not(.collapsed)::after {
  background-image: none;
}
.accordion-button::after {
  background-image: none;
}

/* roulang page: category1 */
:root {
            --bg-primary: #081120;
            --bg-secondary: #0A1428;
            --bg-elevated: #0E1D36;
            --bg-card: rgba(255, 255, 255, 0.035);
            --border-primary: rgba(255, 255, 255, 0.09);
            --border-strong: rgba(255, 255, 255, 0.16);
            --text-primary: #EEF3FB;
            --text-secondary: #A7B3CC;
            --text-muted: #66758F;
            --color-primary: #3D7EFF;
            --color-secondary: #19C8D2;
            --color-accent: #F5A524;
            --gradient-main: linear-gradient(135deg, #2F6BFF 0%, #19C8D2 100%);
            --shadow-primary: 0 0 24px rgba(47, 107, 255, 0.45);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.28);
            --radius-xl: 20px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
            --spacer: 80px;
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image: radial-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 26px 26px;
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 80% -10%, rgba(61, 126, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 10% 100%, rgba(25, 200, 210, 0.05) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            position: relative;
            z-index: 1;
        }
        ::selection {
            background: rgba(61, 126, 255, 0.3);
            color: #fff;
        }

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 26px;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .btn-primary-custom {
            background: var(--gradient-main);
            color: #fff;
            box-shadow: var(--shadow-primary);
        }
        .btn-primary-custom:hover,
        .btn-primary-custom:focus {
            color: #fff;
            filter: brightness(1.1);
            box-shadow: 0 0 36px rgba(47, 107, 255, 0.6);
            transform: translateY(-2px);
        }
        .btn-secondary-custom {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-strong);
            color: var(--text-primary);
            backdrop-filter: blur(8px);
        }
        .btn-secondary-custom:hover,
        .btn-secondary-custom:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(25, 200, 210, 0.45);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ---------- Badge / Tag ---------- */
        .badge-custom {
            display: inline-block;
            padding: 3px 13px;
            border-radius: 100px;
            font-size: 12.5px;
            font-weight: 600;
            background: rgba(25, 200, 210, 0.14);
            color: var(--color-secondary);
            border: 1px solid rgba(25, 200, 210, 0.22);
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: rgba(245, 165, 36, 0.13);
            color: var(--color-accent);
            border-color: rgba(245, 165, 36, 0.22);
        }

        /* ---------- Header ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 17, 32, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(6, 12, 24, 0.92);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 20px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.2px;
            flex-shrink: 0;
        }
        .logo:hover {
            color: #fff;
        }
        .logo-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--color-secondary);
            box-shadow: 0 0 12px rgba(25, 200, 210, 0.7);
            display: inline-block;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            flex-wrap: nowrap;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 17px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: var(--transition);
        }
        .nav-chip:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.1);
        }
        .nav-chip.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(25, 200, 210, 0.3);
            box-shadow: 0 0 18px rgba(25, 200, 210, 0.12);
        }
        .nav-chip.active::after {
            content: "";
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-secondary);
            box-shadow: 0 0 8px rgba(25, 200, 210, 0.8);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-primary);
            color: var(--text-primary);
            font-size: 17px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(25, 200, 210, 0.35);
        }

        /* ---------- Hero ---------- */
        .cat-hero {
            position: relative;
            padding: 168px 0 80px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            isolation: isolate;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 17, 32, 0.88) 0%, rgba(8, 17, 32, 0.72) 50%, var(--bg-primary) 100%);
            z-index: -1;
        }
        .cat-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8, 17, 32, 0.4) 0%, transparent 60%);
            z-index: -1;
        }
        .cat-hero .breadcrumb-custom {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 20px;
        }
        .cat-hero .breadcrumb-custom a {
            color: var(--text-muted);
        }
        .cat-hero .breadcrumb-custom a:hover {
            color: var(--color-secondary);
        }
        .cat-hero .breadcrumb-custom .sep {
            opacity: 0.5;
        }
        .cat-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            max-width: 700px;
        }
        .cat-hero h1 .gradient-text {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .cat-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.75;
            margin-bottom: 30px;
        }
        .hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ---------- Intro ---------- */
        .cat-intro {
            padding: 70px 0 40px;
        }
        .intro-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            backdrop-filter: blur(14px);
            overflow: hidden;
        }
        .intro-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(25, 200, 210, 0.5), transparent);
        }
        .intro-card .intro-label {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            background: rgba(61, 126, 255, 0.14);
            color: #7FA5FF;
            border: 1px solid rgba(61, 126, 255, 0.2);
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .intro-card p {
            color: var(--text-secondary);
            font-size: 15.5px;
            line-height: 1.8;
            margin: 0;
            max-width: 900px;
        }

        /* ---------- Main Layout ---------- */
        .cat-main {
            padding: 40px 0 70px;
        }
        .cat-layout {
            display: grid;
            grid-template-columns: 1fr 400px;
            gap: 36px;
            align-items: start;
        }

        /* Left list */
        .cat-content-list .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 30px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0;
        }
        .section-head .head-line {
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.1), transparent);
            margin-left: 24px;
        }
        .section-head .count-note {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .post-card-horizontal {
            display: flex;
            gap: 22px;
            padding: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            margin-bottom: 20px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .post-card-horizontal::before {
            content: "";
            position: absolute;
            top: 0;
            left: 18px;
            right: 18px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
        }
        .post-card-horizontal:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: var(--shadow-card);
            background: rgba(255, 255, 255, 0.05);
        }
        .post-card-horizontal .post-thumb {
            width: 190px;
            min-width: 190px;
            height: 130px;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .post-card-horizontal .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .post-card-horizontal:hover .post-thumb img {
            transform: scale(1.05);
        }
        .post-card-horizontal .post-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(8, 17, 32, 0.4));
        }
        .post-card-horizontal .post-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-horizontal .post-body .badge-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }
        .post-card-horizontal .post-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin: 0 0 8px;
            color: var(--text-primary);
            transition: var(--transition);
        }
        .post-card-horizontal:hover .post-body h3 {
            color: var(--color-secondary);
        }
        .post-card-horizontal .post-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 12px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-horizontal .post-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .post-card-horizontal .post-meta i {
            margin-right: 5px;
            color: rgba(255, 255, 255, 0.4);
        }
        .post-card-horizontal .post-meta .read-more {
            margin-left: auto;
            color: var(--color-secondary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .post-card-horizontal .post-meta .read-more i {
            color: inherit;
            transition: transform 0.3s ease;
        }
        .post-card-horizontal:hover .post-meta .read-more i {
            transform: translateX(4px);
        }

        /* Sidebar */
        .cat-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            padding: 30px;
            backdrop-filter: blur(14px);
            position: relative;
            overflow: hidden;
        }
        .sidebar-card::after {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(25, 200, 210, 0.08), transparent 70%);
            pointer-events: none;
        }
        .sidebar-card .side-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card .side-title i {
            color: var(--color-secondary);
            font-size: 18px;
        }
        .sidebar-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .quick-index {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }
        .quick-index li {
            margin-bottom: 4px;
        }
        .quick-index a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .quick-index a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: var(--color-secondary);
            padding-left: 16px;
        }
        .quick-index a .idx-num {
            font-size: 12px;
            color: var(--color-accent);
            font-weight: 700;
            width: 22px;
            text-align: right;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 12px 8px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .stat-item .num {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-secondary);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ---------- Recommend ---------- */
        .recommend-section {
            padding: 70px 0;
            background: linear-gradient(180deg, transparent, rgba(10, 20, 40, 0.5), transparent);
        }
        .recommend-section .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .recommend-section .section-head h2 {
            font-size: 30px;
            font-weight: 700;
        }
        .recommend-section .section-head .sub-tip {
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 6px;
        }
        .recommend-card {
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: var(--transition);
            backdrop-filter: blur(12px);
            display: block;
            height: 100%;
            position: relative;
        }
        .recommend-card:hover {
            transform: translateY(-6px);
            border-color: rgba(25, 200, 210, 0.35);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .recommend-card .rec-thumb {
            height: 160px;
            overflow: hidden;
            position: relative;
        }
        .recommend-card .rec-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .recommend-card:hover .rec-thumb img {
            transform: scale(1.06);
        }
        .recommend-card .rec-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(8, 17, 32, 0.45));
        }
        .recommend-card .rec-thumb .badge-custom {
            position: absolute;
            left: 16px;
            bottom: 14px;
            z-index: 1;
            background: rgba(8, 17, 32, 0.8);
            backdrop-filter: blur(6px);
        }
        .recommend-card .rec-body {
            padding: 20px 22px 24px;
        }
        .recommend-card .rec-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .recommend-card .rec-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .recommend-card .rec-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .recommend-card .rec-link i {
            transition: transform 0.3s ease;
        }
        .recommend-card:hover .rec-link i {
            transform: translateX(4px);
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 70px 0;
        }
        .faq-section .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-section .section-head h2 {
            font-size: 30px;
            font-weight: 700;
        }
        .faq-section .section-head .sub-tip {
            color: var(--text-muted);
            font-size: 14px;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.16);
        }
        .faq-item[open] {
            border-color: rgba(25, 200, 210, 0.3);
            box-shadow: 0 4px 24px rgba(25, 200, 210, 0.06);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-secondary);
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            width: 30px;
            height: 30px;
            min-width: 30px;
            border-radius: 50%;
            background: rgba(25, 200, 210, 0.1);
            border: 1px solid rgba(25, 200, 210, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--color-secondary);
            transition: transform 0.4s ease;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 40px 0 80px;
        }
        .cta-card {
            position: relative;
            background: linear-gradient(135deg, rgba(47, 107, 255, 0.12), rgba(25, 200, 210, 0.06));
            border: 1px solid rgba(61, 126, 255, 0.28);
            border-radius: 24px;
            padding: 60px 48px;
            text-align: center;
            overflow: hidden;
            backdrop-filter: blur(16px);
        }
        .cta-card::before {
            content: "";
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 140px;
            background: radial-gradient(ellipse, rgba(61, 126, 255, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-card p {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 30px;
        }
        .cta-card .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: rgba(6, 12, 24, 0.8);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 60px 0 0;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand h3 .logo-dot {
            width: 8px;
            height: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-links h4,
        .footer-contact h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .footer-links a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.1;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2;
            margin-bottom: 4px;
        }
        .footer-contact p i {
            margin-right: 8px;
            color: var(--color-secondary);
            font-size: 13px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1199.98px) {
            .cat-layout {
                grid-template-columns: 1fr 340px;
                gap: 28px;
            }
        }
        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(10, 20, 42, 0.98);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-primary);
                padding: 16px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                overflow: visible;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-chip {
                width: 100%;
                border-radius: var(--radius-md);
                padding: 12px 16px;
                font-size: 15px;
            }
            .nav-chip.active {
                background: rgba(25, 200, 210, 0.08);
            }
            .nav-toggle {
                display: inline-flex;
            }
            .header-inner {
                min-height: 62px;
            }
            .header-actions .btn {
                padding: 8px 18px;
                font-size: 14px;
            }
            .cat-layout {
                grid-template-columns: 1fr;
            }
            .cat-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1;
                min-width: 260px;
            }
            .post-card-horizontal .post-thumb {
                width: 150px;
                min-width: 150px;
                height: 110px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cat-hero {
                padding: 140px 0 60px;
            }
            .cat-hero h1 {
                font-size: 36px;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --spacer: 48px;
            }
            .cat-intro {
                padding: 50px 0 30px;
            }
            .intro-card {
                padding: 28px 24px;
            }
            .post-card-horizontal {
                flex-direction: column;
                padding: 18px;
            }
            .post-card-horizontal .post-thumb {
                width: 100%;
                min-width: 0;
                height: 170px;
            }
            .post-card-horizontal .post-body p {
                -webkit-line-clamp: 3;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .cat-hero {
                padding: 120px 0 48px;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
            .cat-hero .hero-sub {
                font-size: 15px;
            }
            .hero-btn-group .btn {
                width: 100%;
            }
            .cta-card {
                padding: 40px 24px;
                border-radius: 18px;
            }
            .cta-card h2 {
                font-size: 24px;
            }
            .section-head h2 {
                font-size: 23px;
            }
            .recommend-section .section-head h2 {
                font-size: 26px;
            }
            .faq-section .section-head h2 {
                font-size: 26px;
            }
            .header-actions .btn {
                display: none;
            }
            .header-actions {
                gap: 8px;
            }
            .stat-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .stat-item .num {
                font-size: 18px;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .cat-hero h1 {
                font-size: 27px;
            }
            .cat-hero {
                padding-top: 108px;
            }
            .btn {
                padding: 9px 18px;
                font-size: 14px;
            }
            .post-card-horizontal .post-thumb {
                height: 140px;
            }
            .select-none {
                user-select: none;
            }
        }

/* roulang page: article */
:root {
  --bg-primary: #081120;
  --bg-secondary: #0A1428;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border-light: rgba(255, 255, 255, 0.09);
  --border-light-hover: rgba(255, 255, 255, 0.16);
  --primary: #2F6BFF;
  --primary-light: #3D7EFF;
  --accent: #19C8D2;
  --gold: #F5A524;
  --text-primary: #E8EEF9;
  --text-secondary: #9AA7C0;
  --text-muted: #6B7A99;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-primary: 0 0 24px rgba(47, 107, 255, 0.45);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.32);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Helvetica Neue', sans-serif;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(47, 107, 255, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(25, 200, 210, 0.04) 0%, transparent 35%),
    linear-gradient(rgba(47, 107, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, 0.018) 1px, transparent 1px);
  background-size: auto, auto, 36px 36px, 36px 36px;
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--primary-light);
}
img {
  max-width: 100%;
  height: auto;
}
.container {
  max-width: 1320px;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.28s ease;
  gap: 8px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.btn:focus,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 34px rgba(47, 107, 255, 0.65);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 20px rgba(47, 107, 255, 0.4);
}
.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-light-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-gold {
  background: rgba(245, 165, 36, 0.12);
  border: 1px solid rgba(245, 165, 36, 0.35);
  color: var(--gold);
}
.btn-gold:hover {
  background: rgba(245, 165, 36, 0.18);
  border-color: rgba(245, 165, 36, 0.55);
  color: var(--gold);
  transform: translateY(-2px);
}
.btn-gold.active {
  background: rgba(245, 165, 36, 0.22);
  border-color: var(--gold);
  box-shadow: 0 0 20px rgba(245, 165, 36, 0.25);
}

/* ===== 徽章 / 标签 ===== */
.badge-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.02em;
  background: rgba(25, 200, 210, 0.1);
  border: 1px solid rgba(25, 200, 210, 0.28);
  color: var(--accent);
}
.badge-gold {
  background: rgba(245, 165, 36, 0.1);
  border: 1px solid rgba(245, 165, 36, 0.3);
  color: var(--gold);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(8, 17, 32, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  border-bottom-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}
.logo:hover {
  color: var(--text-primary);
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 12px rgba(47, 107, 255, 0.7);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar {
  display: none;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: all 0.25s ease;
}
.nav-chip:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}
.nav-chip.active {
  color: var(--text-primary);
  background: rgba(47, 107, 255, 0.15);
  border-color: rgba(47, 107, 255, 0.35);
  box-shadow: 0 0 16px rgba(47, 107, 255, 0.18);
  position: relative;
}
.nav-chip.active::after {
  content: '';
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  margin: 4px auto 0;
  box-shadow: 0 0 8px rgba(25, 200, 210, 0.6);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 16px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.18);
}

/* ===== 面包屑 ===== */
.article-breadcrumb {
  padding: calc(var(--header-height) + 40px) 0 0;
  background: transparent;
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb-nav a {
  color: var(--text-secondary);
  transition: color 0.2s;
}
.breadcrumb-nav a:hover {
  color: var(--accent);
}
.breadcrumb-nav .sep {
  color: var(--text-muted);
  opacity: 0.6;
}
.breadcrumb-nav .current {
  color: var(--text-secondary);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 文章 Hero ===== */
.article-hero {
  padding: 56px 0 48px;
  position: relative;
}
.article-hero-inner {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}
.article-hero .badge-tag {
  margin-bottom: 16px;
}
.article-hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 14px;
  color: var(--text-muted);
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta i {
  color: var(--accent);
}

/* ===== 正文区 ===== */
.article-content-section {
  padding: 16px 0 48px;
}
.article-body-panel {
  max-width: 860px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}
.article-body-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 32px;
  right: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  border-radius: 50%;
}
.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 238, 249, 0.88);
  word-break: break-word;
}
.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 44px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
  line-height: 1.4;
}
.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 14px;
  line-height: 1.5;
}
.article-body h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px;
}
.article-body p {
  margin-bottom: 18px;
}
.article-body ul {
  margin: 0 0 20px;
  padding-left: 26px;
  list-style: disc;
}
.article-body ul li {
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-body ol {
  margin: 0 0 20px;
  padding-left: 26px;
  list-style: decimal;
}
.article-body ol li {
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-body blockquote {
  border-left: 4px solid var(--accent);
  padding: 18px 22px;
  background: rgba(25, 200, 210, 0.06);
  border-radius: 0 14px 14px 0;
  margin: 28px 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-body pre {
  overflow-x: auto;
  padding: 20px 24px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
  color: #c9d8ef;
  margin: 24px 0;
}
.article-body code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.92em;
  background: rgba(47, 107, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}
.article-body pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}
.article-body table {
  width: 100%;
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
  white-space: nowrap;
}
.article-body table th {
  background: rgba(47, 107, 255, 0.12);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.article-body table td {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}
.article-body table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}
.article-body img {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  margin: 24px 0;
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
.article-body a:hover {
  color: var(--primary-light);
}

/* ===== 操作区 ===== */
.article-actions-section {
  padding: 16px 0 40px;
}
.article-actions-panel {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding: 24px 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}
.article-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.article-tags .label {
  font-size: 13px;
  color: var(--text-muted);
}
.action-buttons {
  display: flex;
  gap: 12px;
}

/* ===== 上下篇 ===== */
.article-pagination-section {
  padding: 8px 0 40px;
}
.pagination-grid {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.pagination-card {
  display: block;
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all 0.28s ease;
  position: relative;
}
.pagination-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.pagination-card .dir {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}
.pagination-card .title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.pagination-card.next {
  text-align: right;
}
.pagination-card.next .dir {
  letter-spacing: 0.08em;
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 48px 0 56px;
}
.section-heading {
  text-align: center;
  margin-bottom: 40px;
}
.section-heading h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.section-heading .sub {
  font-size: 15px;
  color: var(--text-secondary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.related-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}
.related-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}
.related-card .card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.related-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .card-img img {
  transform: scale(1.04);
}
.related-card .card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.related-card .card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.related-card .card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.related-card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}
.related-card .card-link:hover {
  color: var(--primary-light);
  gap: 10px;
}

/* ===== 返回列表 ===== */
.article-back-section {
  padding: 8px 0 56px;
  text-align: center;
}
.article-back-section .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* ===== 内容未找到 ===== */
.article-not-found-section {
  padding: 80px 0;
}
.article-not-found {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 40px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
}
.article-not-found h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.article-not-found p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ===== CTA 区块 ===== */
.article-cta {
  padding: 48px 0 64px;
}
.article-cta .cta-panel {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 40px;
  background: rgba(47, 107, 255, 0.06);
  border: 1px solid rgba(47, 107, 255, 0.2);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.article-cta .cta-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
}
.article-cta h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.article-cta p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.article-cta .cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: rgba(6, 12, 24, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 56px 0 24px;
  margin-top: 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 991.98px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(8, 17, 32, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: none;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-chip {
    justify-content: flex-start;
    padding: 12px 18px;
    border-radius: var(--radius-sm);
  }
  .nav-chip.active::after {
    margin: 4px 0 0 0;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .header-actions .btn {
    display: none;
  }
  .article-hero h1 {
    font-size: 32px;
  }
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767.98px) {
  .article-body-panel {
    padding: 32px 24px;
  }
  .article-body h2 {
    font-size: 24px;
  }
  .article-body h3 {
    font-size: 20px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .pagination-grid {
    grid-template-columns: 1fr;
  }
  .article-actions-panel {
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
  }
  .action-buttons {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 575.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .article-hero {
    padding: 36px 0 28px;
  }
  .article-hero h1 {
    font-size: 28px;
  }
  .article-body-panel {
    padding: 24px 16px;
    border-radius: var(--radius-md);
  }
  .article-body h2 {
    font-size: 21px;
    padding-left: 12px;
  }
  .article-body h3 {
    font-size: 18px;
  }
  .article-cta .cta-panel {
    padding: 32px 20px;
  }
  .article-cta h2 {
    font-size: 21px;
  }
  .section-heading h2 {
    font-size: 26px;
  }
}

/* roulang page: category2 */
:root {
            --bg-deep: #081120;
            --bg-main: #0a1428;
            --bg-secondary: #0f1e38;
            --primary: #2f6bff;
            --primary-light: #3d7eff;
            --accent: #19c8d2;
            --gold: #f5a524;
            --text-primary: #e8edf7;
            --text-secondary: #a0aec0;
            --text-muted: #718096;
            --border-glass: rgba(255, 255, 255, 0.09);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-glow: 0 0 24px rgba(47, 107, 255, 0.45);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            background-image: radial-gradient(circle at 20% 20%, rgba(47, 107, 255, 0.08) 0%, transparent 40%), radial-gradient(circle at 80% 0%, rgba(25, 200, 210, 0.05) 0%, transparent 35%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
            z-index: 0;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 17, 32, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 17, 32, 0.92);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo:hover {
            color: #fff;
        }
        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 12px rgba(47, 107, 255, 0.7);
            display: inline-block;
        }
        .main-nav {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex: 1;
            justify-content: center;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid transparent;
            white-space: nowrap;
            background: transparent;
            transition: var(--transition);
        }
        .nav-chip:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .nav-chip.active {
            color: #fff;
            background: rgba(25, 200, 210, 0.12);
            border-color: rgba(25, 200, 210, 0.35);
            box-shadow: 0 0 18px rgba(25, 200, 210, 0.12);
            position: relative;
        }
        .nav-chip.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(25, 200, 210, 0.6);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 32px rgba(47, 107, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(8px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-gold {
            background: linear-gradient(135deg, #e69a1a, #f7b733);
            color: #141414;
            box-shadow: 0 0 20px rgba(245, 165, 36, 0.3);
        }
        .btn-gold:hover {
            box-shadow: 0 0 32px rgba(245, 165, 36, 0.5);
            transform: translateY(-2px);
            color: #141414;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        @media (max-width: 992px) {
            .header-inner {
                height: 64px;
                gap: 12px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(8, 17, 32, 0.97);
                border-bottom: 1px solid var(--border-glass);
                padding: 16px 20px;
                flex-direction: column;
                gap: 8px;
                max-height: none;
                overflow-y: auto;
                backdrop-filter: blur(20px);
            }
            .main-nav.open {
                display: flex;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-chip {
                justify-content: center;
                border-radius: var(--radius-sm);
                padding: 12px 18px;
                font-size: 15px;
            }
            .nav-chip.active::after {
                display: none;
            }
        }
        @media (max-width: 576px) {
            .header-actions .btn-primary {
                padding: 8px 14px;
                font-size: 13px;
            }
            .logo {
                font-size: 20px;
            }
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 160px 0 70px;
            background: linear-gradient(135deg, rgba(8, 17, 32, 0.88) 0%, rgba(8, 17, 32, 0.75) 100%);
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--bg-deep) 0%, transparent 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(25, 200, 210, 0.12);
            border: 1px solid rgba(25, 200, 210, 0.3);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 18px;
            backdrop-filter: blur(8px);
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 1px;
            color: #fff;
        }
        .page-hero h1 .gradient-text {
            background: linear-gradient(120deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .page-hero .lead {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-indicator {
            display: flex;
            gap: 24px;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-indicator .item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 12px 20px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            min-width: 120px;
            backdrop-filter: blur(8px);
        }
        .hero-indicator .num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-indicator .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 130px 0 50px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero .lead {
                font-size: 15px;
            }
            .hero-indicator {
                flex-wrap: wrap;
                gap: 12px;
            }
            .hero-indicator .item {
                min-width: calc(50% - 12px);
                padding: 10px 16px;
            }
            .hero-indicator .num {
                font-size: 24px;
            }
        }

        /* ===== Section ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .tag {
            display: inline-block;
            font-size: 13px;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
            font-weight: 600;
            background: rgba(25, 200, 210, 0.08);
            padding: 4px 16px;
            border-radius: 999px;
            border: 1px solid rgba(25, 200, 210, 0.2);
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.8;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Intro card ===== */
        .intro-block {
            background: var(--bg-main);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .intro-inner {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 48px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
        }
        .intro-inner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(25, 200, 210, 0.4), transparent);
        }
        .intro-text {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            max-width: 800px;
        }
        .intro-text strong {
            color: var(--text-primary);
        }
        .intro-metrics {
            display: flex;
            gap: 32px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .intro-metrics .metric {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .intro-metrics .metric i {
            color: var(--accent);
            font-size: 18px;
            width: 20px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .intro-inner {
                padding: 28px 20px;
            }
            .intro-text {
                font-size: 15px;
            }
            .intro-metrics {
                gap: 16px;
                flex-direction: column;
            }
        }

        /* ===== Flow cards (horizontal) ===== */
        .flow-section {
            background: var(--bg-deep);
            position: relative;
        }
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .flow-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .flow-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 107, 255, 0.5), transparent);
        }
        .flow-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: var(--shadow-card);
            background: rgba(255, 255, 255, 0.06);
        }
        .flow-card:hover::before {
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
        }
        .flow-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(47, 107, 255, 0.2), rgba(25, 200, 210, 0.2));
            border: 1px solid rgba(47, 107, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .flow-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }
        .flow-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        @media (max-width: 992px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .flow-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .flow-card {
                padding: 22px 18px;
            }
        }

        /* ===== Topic cards (horizontal flow) ===== */
        .topics-section {
            background: var(--bg-main);
            position: relative;
        }
        .topics-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 107, 255, 0.4), transparent);
        }
        .topics-scroll {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .topic-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(12px);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .topic-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, rgba(47, 107, 255, 0.4), transparent);
            transition: var(--transition);
        }
        .topic-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: var(--shadow-card);
            background: rgba(255, 255, 255, 0.05);
        }
        .topic-card:hover::before {
            background: linear-gradient(90deg, var(--accent), transparent);
        }
        .topic-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .topic-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .topic-card:hover .card-img img {
            transform: scale(1.05);
        }
        .topic-card .card-img::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60%;
            background: linear-gradient(to top, rgba(8, 17, 32, 0.9) 0%, transparent 100%);
        }
        .topic-card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(25, 200, 210, 0.2);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(25, 200, 210, 0.35);
            color: var(--accent);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 12px;
            border-radius: 999px;
        }
        .topic-card .card-body {
            padding: 22px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card .card-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .topic-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }
        .topic-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        .topic-card .card-meta .bookmark {
            color: var(--gold);
            cursor: pointer;
            transition: var(--transition);
            font-size: 15px;
        }
        .topic-card .card-meta .bookmark:hover {
            transform: scale(1.15);
        }
        .topic-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-light);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }
        .topic-card .card-link:hover {
            color: var(--accent);
            gap: 10px;
        }
        @media (max-width: 992px) {
            .topics-scroll {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .topics-scroll {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .topic-card .card-img {
                height: 160px;
            }
        }

        /* ===== Metrics ===== */
        .metrics-section {
            background: var(--bg-deep);
        }
        .metrics-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            backdrop-filter: blur(16px);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .metric-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 107, 255, 0.5), transparent);
        }
        .metric-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: var(--shadow-card);
        }
        .metric-card .icon {
            font-size: 30px;
            color: var(--accent);
            margin-bottom: 16px;
            display: block;
        }
        .metric-card .value {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-card .label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .metric-card.gold .icon {
            color: var(--gold);
        }
        .metric-card.gold .value {
            background: linear-gradient(135deg, #f5a524, #e67e22);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        @media (max-width: 992px) {
            .metrics-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .metrics-wrap {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .metric-card {
                padding: 20px 14px;
            }
            .metric-card .value {
                font-size: 28px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-main);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            backdrop-filter: blur(12px);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.15);
        }
        .faq-item.active {
            border-color: rgba(25, 200, 210, 0.3);
            box-shadow: 0 0 24px rgba(25, 200, 210, 0.08);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 500;
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: #fff;
        }
        .faq-question .icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(25, 200, 210, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition);
            font-size: 13px;
            color: var(--accent);
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(135deg);
            background: rgba(25, 200, 210, 0.3);
        }
        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
            margin-top: 0;
            animation: fadeIn 0.3s ease;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @media (max-width: 576px) {
            .faq-question {
                padding: 16px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 18px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 50% 50%, rgba(47, 107, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-card {
            position: relative;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: calc(var(--radius-lg) + 8px);
            padding: 56px 48px;
            text-align: center;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            max-width: 900px;
            margin: 0 auto;
            overflow: hidden;
        }
        .cta-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(25, 200, 210, 0.5), transparent);
        }
        .cta-card h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-actions .btn-gold {
            color: #111;
        }
        .cta-actions .btn-gold:hover {
            color: #111;
        }
        @media (max-width: 768px) {
            .cta-card {
                padding: 36px 20px;
            }
            .cta-card h2 {
                font-size: 24px;
            }
            .cta-card p {
                font-size: 15px;
            }
        }

        /* ===== Related ===== */
        .related-section {
            background: var(--bg-main);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 24px;
            backdrop-filter: blur(12px);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: var(--shadow-card);
        }
        .related-card .related-img {
            width: 100%;
            height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 18px;
        }
        .related-card .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .related-img img {
            transform: scale(1.05);
        }
        .related-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .related-card .related-link {
            font-size: 14px;
            color: var(--primary-light);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .related-link:hover {
            color: var(--accent);
            gap: 10px;
        }
        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060d1a;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 60px 0 0;
            position: relative;
            z-index: 2;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-links h4,
        .footer-contact h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            color: var(--text-secondary);
            font-size: 14px;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-contact p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 2;
            margin-bottom: 4px;
        }
        .footer-contact p i {
            color: var(--accent);
            width: 20px;
            margin-right: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom span:first-child {
            color: var(--text-secondary);
        }
        @media (max-width: 768px) {
            .site-footer {
                padding-top: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: rgba(47, 107, 255, 0.2);
            border: 1px solid rgba(47, 107, 255, 0.4);
            color: #fff;
            font-size: 16px;
            backdrop-filter: blur(10px);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: rgba(47, 107, 255, 0.4);
            box-shadow: 0 0 24px rgba(47, 107, 255, 0.4);
        }
        @media (max-width: 576px) {
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
            }
        }

/* roulang page: category3 */
:root {
  --bg-deep: #081120;
  --bg-panel: #0A1428;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --border-glass: rgba(255,255,255,0.09);
  --border-glass-hover: rgba(255,255,255,0.18);
  --primary: #2F6BFF;
  --primary-hover: #4D83FF;
  --secondary: #19C8D2;
  --amber: #F5A524;
  --amber-hover: #FFC46B;
  --text-main: #E8EFF8;
  --text-body: #A7B4C8;
  --text-muted: #6C7A90;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-btn: 0 0 24px rgba(47,107,255,0.45);
  --font-main: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 24px 24px, 60px 60px, 60px 60px;
  color: var(--text-body);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--secondary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--text-main); }
img { max-width: 100%; height: auto; }
button, input, select, textarea { font-family: inherit; }
:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; }
.container { max-width: 1320px; }
.page-wrap { padding-top: 72px; }

/* ---------- Header & Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1040;
  background: rgba(8,17,32,0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  background: rgba(8,17,32,0.92);
  border-bottom-color: rgba(255,255,255,0.12);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 12px rgba(47,107,255,0.8);
}
.logo:hover { color: var(--text-main); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  border: 1px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}
.nav-chip:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.nav-chip.active {
  background: rgba(47,107,255,0.15);
  border-color: rgba(47,107,255,0.4);
  color: #fff;
}
.nav-chip.active::after {
  content: '';
  display: block;
  width: 16px;
  height: 2px;
  margin: 4px auto 0;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 500;
  transition: all .25s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  color: #fff;
  box-shadow: var(--shadow-btn);
  padding: 10px 22px;
}
.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, var(--primary-hover), #2ACBD5);
  color: #fff;
  box-shadow: 0 0 34px rgba(47,107,255,0.65);
  transform: translateY(-2px);
}
.btn-ghost {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 10px 22px;
}
.btn-ghost:hover, .btn-ghost:focus {
  background: rgba(255,255,255,0.08);
  border-color: var(--border-glass-hover);
  color: #fff;
  transform: translateY(-2px);
}
.btn-amber {
  background: linear-gradient(135deg, var(--amber), var(--amber-hover));
  border: none;
  color: #1A1508;
  box-shadow: 0 0 24px rgba(245,165,36,0.35);
  padding: 10px 22px;
}
.btn-amber:hover, .btn-amber:focus {
  background: linear-gradient(135deg, #FFB63A, #FFD27E);
  color: #1A1508;
  box-shadow: 0 0 34px rgba(245,165,36,0.55);
  transform: translateY(-2px);
}
.btn-sm { padding: 6px 16px; font-size: 14px; border-radius: 10px; }
.nav-toggle {
  display: none;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-main);
  width: 42px; height: 42px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: all .25s ease;
}
.nav-toggle:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--border-glass-hover);
}

/* ---------- Cate Hero ---------- */
.cate-hero {
  position: relative;
  padding: 150px 0 88px;
  background:
    linear-gradient(180deg, rgba(8,17,32,0.75), rgba(10,20,40,0.95)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(25,200,210,0.12);
  border: 1px solid rgba(25,200,210,0.3);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.cate-hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-body);
  max-width: 640px;
  margin-bottom: 28px;
  line-height: 1.75;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 28px;
  position: relative;
  overflow: hidden;
}
.hero-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}
.hero-card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(47,107,255,0.35), rgba(25,200,210,0.25));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  margin-bottom: 18px;
}
.hero-card h3 { color: #fff; font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.hero-card p { color: var(--text-body); font-size: 14px; margin-bottom: 18px; }
.progress-item {
  display: grid;
  grid-template-columns: 72px 1fr 42px;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13px;
}
.progress-item span { color: var(--text-body); white-space: nowrap; }
.progress-item em { color: var(--text-main); font-style: normal; text-align: right; font-weight: 600; }
.progress-track {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 6px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 6px;
}

/* ---------- Section Base ---------- */
section {
  position: relative;
}
.section-pad { padding: 88px 0; }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head h2, .section-head h2 {
  font-size: 32px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-body);
  margin-bottom: 0;
}
.text-start { text-align: left; margin-left: 0; }

/* ---------- Cate Index ---------- */
.cate-index {
  padding: 88px 0;
  background: linear-gradient(180deg, rgba(8,17,32,0) 0%, rgba(10,20,40,0.4) 50%, rgba(8,17,32,0) 100%);
}
.index-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.index-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.index-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.index-item:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card);
}
.index-item:hover .index-arrow { transform: translateX(4px); color: var(--secondary); }
.index-num {
  font-size: 20px;
  font-weight: 700;
  color: rgba(47,107,255,0.7);
  min-width: 42px;
  font-variant-numeric: tabular-nums;
}
.index-content { flex: 1; }
.index-content h3 {
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}
.index-content p {
  color: var(--text-body);
  font-size: 14px;
  margin-bottom: 0;
}
.index-arrow {
  color: var(--text-muted);
  font-size: 18px;
  transition: transform .3s ease, color .3s ease;
}
.index-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
  height: 100%;
}
.aside-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 26px;
  position: relative;
  overflow: hidden;
}
.aside-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
}
.aside-card.accent {
  background: linear-gradient(180deg, rgba(47,107,255,0.09), rgba(255,255,255,0.03));
  border-color: rgba(47,107,255,0.25);
  flex: 1;
}
.aside-card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(47,107,255,0.35), rgba(25,200,210,0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  margin-bottom: 16px;
}
.aside-card h3 {
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.aside-card p {
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 10px;
}
.aside-card p:last-of-type { margin-bottom: 16px; }
.aside-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(25,200,210,0.1);
  border: 1px solid rgba(25,200,210,0.25);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 500;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-body);
}
.check-list li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--secondary);
  font-size: 13px;
}

/* ---------- Article Cards ---------- */
.cate-articles {
  padding: 88px 0;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  transition: all .3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  z-index: 1;
}
.article-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card);
}
.article-thumb {
  position: relative;
  height: 185px;
  overflow: hidden;
}
.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,17,32,0) 40%, rgba(8,17,32,0.6) 100%);
}
.badge-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(25,200,210,0.85);
  color: #04242a;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.article-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.article-body h3 {
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
}
.article-body p {
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 14px;
  font-size: 13px;
}
.article-meta span { color: var(--text-muted); }
.article-meta span i { margin-right: 5px; }
.article-link {
  color: var(--secondary);
  font-weight: 500;
  transition: color .2s ease;
}
.article-link i { transition: transform .2s ease; font-size: 12px; }
.article-link:hover { color: #fff; }
.article-link:hover i { transform: translateX(3px); }

/* ---------- Metrics ---------- */
.cate-metrics {
  padding: 88px 0;
  background:
    linear-gradient(180deg, rgba(10,20,40,0.85), rgba(8,17,32,0.95)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 28px 24px;
  text-align: center;
  height: 100%;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.metric-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.metric-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47,107,255,0.35);
  box-shadow: var(--shadow-card);
}
.metric-card i {
  font-size: 30px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}
.metric-card h4 {
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.metric-card strong {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
}
.metric-card p {
  color: var(--text-body);
  font-size: 13px;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- FAQ ---------- */
.cate-faq {
  padding: 88px 0;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.accordion-item {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-glass) !important;
  border-radius: var(--radius-md) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: border-color .3s ease;
}
.accordion-item:not(:first-of-type) { border-top: 1px solid var(--border-glass) !important; }
.accordion-item:focus-within { border-color: var(--secondary) !important; }
.accordion-button {
  background: transparent !important;
  color: var(--primary) !important;
  font-weight: 600;
  font-size: 16px;
  padding: 20px 22px;
  box-shadow: none !important;
}
.accordion-button:not(.collapsed) { color: var(--primary) !important; }
.accordion-button::after {
  background-image: none !important;
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--text-muted);
  transform: rotate(-90deg);
  transition: transform .3s ease;
}
.accordion-button:not(.collapsed)::after {
  color: var(--secondary);
  transform: rotate(0deg);
}
.accordion-body {
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.75;
  padding: 0 22px 20px;
}

/* ---------- More / Related ---------- */
.cate-more {
  padding: 88px 0 0;
}
.more-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 18px;
  height: 100%;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.more-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.more-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card);
}
.more-thumb {
  width: 110px;
  height: 84px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.more-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.more-info { flex: 1; padding-right: 6px; }
.more-info h3 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
}
.more-info p {
  color: var(--text-body);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- CTA ---------- */
.cate-cta {
  padding: 88px 0;
}
.cta-panel {
  background: linear-gradient(135deg, rgba(47,107,255,0.16), rgba(25,200,210,0.10)), var(--bg-panel);
  border: 1px solid rgba(47,107,255,0.3);
  border-radius: 24px;
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
}
.cta-panel::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47,107,255,0.18), transparent 70%);
  bottom: -200px;
  right: -100px;
  pointer-events: none;
}
.cta-panel h2 {
  color: #fff;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.cta-panel p {
  color: var(--text-body);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 30px;
  line-height: 1.75;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  background: rgba(5,10,22,0.9);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand h3 {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-brand p {
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.7;
  max-width: 360px;
  margin-bottom: 0;
}
.footer-links h4, .footer-contact h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
}
.footer-links a {
  color: var(--text-body);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color .2s ease, transform .2s ease;
}
.footer-links a:hover {
  color: var(--secondary);
  transform: translateX(3px);
}
.footer-contact p {
  color: var(--text-body);
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom span {
  color: var(--text-muted);
  font-size: 13px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1199.98px) {
  .nav-chip { padding: 8px 14px; font-size: 13px; }
}
@media (max-width: 991.98px) {
  .main-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 12px; right: 12px;
    background: rgba(8,17,32,0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  }
  .main-nav.show { display: flex; }
  .nav-chip { padding: 12px 16px; border-radius: 12px; }
  .nav-chip.active { background: rgba(47,107,255,0.15); }
  .nav-chip.active::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .cate-hero { padding: 130px 0 64px; }
  .cate-hero h1 { font-size: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .index-aside { margin-top: 24px; }
}
@media (max-width: 767.98px) {
  .section-head h2 { font-size: 26px; }
  .cate-hero h1 { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .cate-index, .cate-articles, .cate-metrics, .cate-faq, .cate-more, .cate-cta { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-panel { padding: 40px 24px; }
  .cta-panel h2 { font-size: 26px; }
  .more-card { flex-direction: column; align-items: flex-start; }
  .more-thumb { width: 100%; height: 150px; }
  .header-actions .btn-primary { padding: 10px 16px; font-size: 14px; }
}
@media (max-width: 575.98px) {
  .cate-hero { padding: 120px 0 48px; }
  .cate-hero h1 { font-size: 27px; }
  .hero-actions .btn { width: 100%; }
  .header-inner { gap: 10px; }
  .logo { font-size: 18px; }
  .header-actions .btn-primary { padding: 8px 14px; font-size: 13px; }
  .section-head { margin-bottom: 32px; }
  .section-head p { font-size: 14px; }
  .index-num { min-width: 32px; font-size: 16px; }
}