/* roulang page: index */
:root {
  --bg-primary: #121418;
  --bg-secondary: #1A1E24;
  --bg-card: #1F242C;
  --bg-footer: #0D0F12;
  --accent: #F5A524;
  --accent-hover: #D99516;
  --accent-light: #FBD38D;
  --accent-subtle: rgba(245, 165, 36, 0.1);
  --accent-glow: rgba(245, 165, 36, 0.06);
  --gray-line: #3D4552;
  --text-gray: #B8C0CC;
  --text-heading: #F5F7FA;
  --text-muted: #78828F;
  --green: #4ADE80;
  --rating: #FBBF24;
  --border: #2A303A;
  --divider: #262C35;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-img: 10px;
  --radius-badge: 4px;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.35);
  --shadow-card-hover: 0 6px 24px rgba(0,0,0,0.45);
  --shadow-btn: 0 2px 8px rgba(245,165,36,0.3);
  --transition: 0.2s ease;
  --container-max: 1200px;
  --section-padding: 64px 0;
  --section-padding-mobile: 40px 0;
  --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-gray);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--text-gray);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition);
}

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

ul,ol {
  list-style: none;
}

h1,h2,h3,h4,h5,h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(18,20,24,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-heading);
  white-space: nowrap;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo .logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #121418;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

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

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

.nav-menu a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-gray);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all var(--transition);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-gray);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ============ Hero ============ */
.hero {
  padding: 120px 0 64px;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
  min-height: 480px;
  display: flex;
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--accent-glow) 0%, transparent 40%, transparent 100%);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-heading);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-content h1 .highlight {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-gray);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.5;
}

.btn-primary {
  background: var(--accent);
  color: #121418;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #121418;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245,165,36,0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-btn);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-secondary:hover {
  background: var(--accent-subtle);
  color: var(--accent-light);
  border-color: var(--accent-light);
}

.btn-secondary:active {
  background: rgba(245, 165, 36, 0.2);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.hero-visual {
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16/10;
  position: relative;
}

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

.hero-visual:hover img {
  transform: scale(1.02);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(18,20,24,0.6) 100%);
  pointer-events: none;
  border-radius: var(--radius-card);
}

/* ============ Section 通用 ============ */
.section {
  padding: var(--section-padding);
}

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

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

.section-header h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
  line-height: 1.3;
}

.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.75;
}

/* ============ 核心功能亮点 2+1 非对称栅格 ============ */
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.6fr;
  gap: 20px;
  align-items: stretch;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.feature-card.feature-wide {
  grid-column: span 2;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.feature-card .feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-subtle);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-bottom: 16px;
}

.feature-card.feature-wide .feature-icon {
  margin-bottom: 0;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ============ 资源库分类入口 ============ */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.resource-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.resource-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.resource-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.resource-card:hover::before {
  opacity: 1;
}

.resource-card .resource-icon {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.resource-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-heading);
}

.resource-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.resource-card .resource-count {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  margin-top: auto;
}

/* ============ 横向滚动卡片 ============ */
.scroll-row {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 12px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.scroll-row::-webkit-scrollbar {
  height: 6px;
}

.scroll-row::-webkit-scrollbar-track {
  background: transparent;
}

.scroll-row::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.scroll-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.scroll-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
}

.scroll-card .scroll-card-img {
  aspect-ratio: 3/2;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

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

.scroll-card .scroll-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.scroll-card .scroll-card-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  line-height: 1.4;
}

.scroll-card .scroll-card-body .scroll-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-badge);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
  background: var(--accent-subtle);
  color: var(--accent);
  white-space: nowrap;
}

.badge-green {
  background: rgba(74, 222, 128, 0.12);
  color: var(--green);
}

/* ============ 最新动态 CMS 列表 ============ */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.news-item {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 14px;
  transition: all var(--transition);
  align-items: center;
}

.news-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card);
}

.news-item .news-thumb {
  width: 120px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

.news-item .news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-item .news-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.news-item .news-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  line-height: 1.4;
  margin: 0;
}

.news-item .news-content .news-summary {
  font-size: 0.875rem;
  color: var(--text-gray);
  line-height: 1.6;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.news-item .news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.news-empty {
  padding: 32px;
  text-align: center;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  font-size: 0.9rem;
}

/* ============ 高清观影体验 ============ */
.hd-section {
  position: relative;
  overflow: hidden;
}

.hd-section .hd-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  pointer-events: none;
}

.hd-section .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.hd-content h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hd-content p {
  font-size: 1rem;
  color: var(--text-gray);
  line-height: 1.75;
  margin-bottom: 16px;
}

.hd-content .hd-features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hd-visual {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16/9;
  background: var(--bg-card);
}

.hd-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============ 多端设备兼容 ============ */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.device-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}

.device-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.device-card .device-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.device-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.device-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============ 会员权益对比 ============ */
.plans-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
}

.plan-card.plan-premium {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(245,165,36,0.15);
}

.plan-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.plan-tag {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--accent);
  color: #121418;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
}

.plan-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 4px;
}

.plan-card .plan-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 20px;
  line-height: 1.2;
}

.plan-card .plan-price small {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-card ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.plan-card ul li {
  font-size: 0.9rem;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
}

.plan-card ul li::before {
  content: "✓";
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
}

.plan-card ul li.muted-feature {
  color: var(--text-muted);
}

.plan-card ul li.muted-feature::before {
  content: "—";
  color: var(--text-muted);
}

.plan-card .btn {
  width: 100%;
}

/* ============ 用户评价 ============ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 22px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.review-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.review-stars {
  color: var(--rating);
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.7;
  flex: 1;
}

.review-author {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============ 品牌数据统计 ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: var(--accent);
}

.stat-item .stat-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-item .stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ============ 使用教程精选 ============ */
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tutorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.tutorial-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.tutorial-card .tutorial-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

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

.tutorial-card .tutorial-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.tutorial-card .tutorial-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-heading);
  line-height: 1.4;
}

.tutorial-card .tutorial-body p {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.6;
  flex: 1;
}

.tutorial-card .tutorial-link {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

.tutorial-card .tutorial-link:hover {
  color: var(--accent-light);
}

/* ============ 离线缓存功能 ============ */
.offline-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.offline-visual {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16/10;
  background: var(--bg-card);
}

.offline-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.offline-content h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 16px;
  line-height: 1.3;
}

.offline-content p {
  font-size: 1rem;
  color: var(--text-gray);
  line-height: 1.75;
  margin-bottom: 16px;
}

.offline-content .offline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.faq-item.active {
  border-color: var(--accent);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  width: 100%;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition);
  line-height: 1.5;
}

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

.faq-question .faq-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition);
  font-weight: 400;
}

.faq-item.active .faq-question .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
}

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

.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 0.875rem;
  color: var(--text-gray);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* ============ 更新日志 ============ */
.timeline {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--divider);
}

.timeline-item {
  position: relative;
  padding-bottom: 28px;
  padding-left: 16px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.timeline-item .timeline-version {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
  display: block;
}

.timeline-item .timeline-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 6px;
  line-height: 1.4;
}

.timeline-item p {
  font-size: 0.875rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ============ 底部 CTA ============ */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--bg-footer);
  overflow: hidden;
}

.cta-section .cta-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.cta-section h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-section p {
  font-size: 1rem;
  color: var(--text-gray);
  margin-bottom: 28px;
  line-height: 1.75;
}

.cta-section .btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--divider);
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 0.875rem;
  color: var(--text-gray);
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--divider);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .feature-card.feature-wide {
    grid-column: span 1;
    flex-direction: column;
  }
  .feature-card.feature-wide .feature-icon {
    margin-bottom: 16px;
  }
  .resource-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .devices-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .tutorial-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .hd-section .container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .offline-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 56px;
  }
  .nav-menu {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(18,20,24,0.98);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 40px 24px;
    gap: 24px;
    z-index: 999;
    overflow-y: auto;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-menu a {
    font-size: 1.125rem;
    padding: 8px 0;
    border-bottom: none;
    color: var(--text-heading);
  }
  .nav-menu a:hover,
  .nav-menu a.active {
    color: var(--accent);
    border-bottom: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero {
    padding: 100px 0 40px;
    min-height: auto;
  }
  .hero .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-visual {
    order: -1;
    aspect-ratio: 16/9;
  }
  .section {
    padding: 40px 0;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature-card.feature-wide {
    grid-column: span 1;
  }
  .resource-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .scroll-card {
    flex: 0 0 75vw;
  }
  .devices-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .plans-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .stat-item .stat-number {
    font-size: 1.75rem;
  }
  .tutorial-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .news-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-item .news-thumb {
    width: 100%;
    height: 160px;
    border-radius: 8px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .container {
    padding: 0 16px;
  }
}

@media (max-width: 520px) {
  .section {
    padding: 32px 0;
  }
  .section-header h2 {
    font-size: 1.5rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .btn-lg {
    padding: 12px 20px;
    font-size: 1rem;
  }
  .feature-card {
    padding: 18px;
  }
  .resource-card {
    padding: 18px;
  }
  .scroll-card {
    flex: 0 0 82vw;
  }
  .device-card {
    padding: 20px 14px;
  }
  .device-card .device-icon {
    font-size: 2rem;
  }
  .plan-card {
    padding: 24px 18px;
  }
  .stat-item .stat-number {
    font-size: 1.5rem;
  }
  .tutorial-card .tutorial-body {
    padding: 14px;
  }
  .news-item {
    padding: 10px;
  }
  .news-item .news-thumb {
    height: 140px;
  }
  .faq-question {
    padding: 14px 16px;
    font-size: 0.95rem;
  }
  .faq-answer-inner {
    padding: 0 16px 14px;
    font-size: 0.85rem;
  }
  .cta-section {
    padding: 56px 0;
  }
  .cta-section .btn-group {
    flex-direction: column;
  }
  .cta-section .btn-group .btn {
    width: 100%;
  }
  .footer-grid {
    gap: 16px;
    padding-bottom: 24px;
  }
}

/* roulang page: category1 */
:root {
      --bg-primary: #121418;
      --bg-secondary: #1A1E24;
      --bg-card: #1F242C;
      --bg-footer: #0D0F12;
      --accent: #F5A524;
      --accent-hover: #D99516;
      --accent-light: #FBD38D;
      --accent-subtle: rgba(245, 165, 36, 0.1);
      --accent-glow: rgba(245, 165, 36, 0.06);
      --gray-line: #3D4552;
      --text-gray: #B8C0CC;
      --text-heading: #F5F7FA;
      --text-muted: #78828F;
      --green: #4ADE80;
      --rating: #FBBF24;
      --border: #2A303A;
      --divider: #262C35;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-img: 10px;
      --radius-badge: 4px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.35);
      --shadow-card-hover: 0 6px 24px rgba(0,0,0,0.45);
      --shadow-btn: 0 2px 8px rgba(245,165,36,0.3);
      --transition: 0.2s ease;
      --container-max: 1200px;
      --section-padding: 64px 0;
      --section-padding-mobile: 40px 0;
      --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-family);
      font-size: 16px;
      font-weight: 400;
      line-height: 1.75;
      color: var(--text-gray);
      background: var(--bg-primary);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
      padding-top: 64px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--text-gray);
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
    }
    a:hover {
      color: var(--accent-light);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 2px solid var(--accent-light);
      outline-offset: 2px;
    }
    button {
      font-family: var(--font-family);
      cursor: pointer;
      border: none;
      background: none;
      transition: all var(--transition);
    }
    button:focus-visible {
      outline: 2px solid var(--accent-light);
      outline-offset: 2px;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* ============ 导航 ============ */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(18,20,24,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      height: 64px;
      display: flex;
      align-items: center;
    }
    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: 100%;
    }
    .logo {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-heading);
      white-space: nowrap;
      letter-spacing: 0.01em;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo .logo-icon {
      width: 28px;
      height: 28px;
      border-radius: 6px;
      background: var(--accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #121418;
      font-size: 0.875rem;
      font-weight: 700;
      flex-shrink: 0;
    }
    .logo:hover {
      color: var(--accent);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      flex-wrap: wrap;
    }
    .nav-menu a {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-gray);
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      white-space: nowrap;
      transition: color var(--transition), border-color var(--transition);
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }
    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--bg-card);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      transition: all var(--transition);
    }
    .nav-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text-gray);
      border-radius: 2px;
      transition: all var(--transition);
    }
    .nav-toggle.active span:nth-child(1) {
      transform: translateY(6px) rotate(45deg);
    }
    .nav-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
      transform: translateY(-6px) rotate(-45deg);
    }
    /* ============ 面包屑 ============ */
    .breadcrumb-section {
      background: var(--bg-primary);
      padding: 32px 0 20px;
      border-bottom: 1px solid var(--divider);
    }
    .breadcrumb-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 14px;
    }
    .breadcrumb-nav a {
      color: var(--text-gray);
      transition: color var(--transition);
    }
    .breadcrumb-nav a:hover {
      color: var(--accent);
    }
    .breadcrumb-nav .separator {
      color: var(--text-muted);
      user-select: none;
    }
    .breadcrumb-nav .current {
      color: var(--accent);
    }
    .breadcrumb-section h1 {
      font-size: clamp(1.75rem, 3.5vw, 2.5rem);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-heading);
      margin-bottom: 8px;
      letter-spacing: -0.01em;
    }
    /* ============ 通用 Section ============ */
    .section {
      padding: var(--section-padding);
      background: var(--bg-primary);
    }
    .section-alt {
      background: var(--bg-secondary);
    }
    .section-heading {
      font-size: clamp(1.5rem, 2.5vw, 1.875rem);
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-heading);
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }
    .section-subheading {
      font-size: 1rem;
      color: var(--text-gray);
      margin-bottom: 28px;
      max-width: 760px;
      line-height: 1.75;
    }
    /* ============ 按钮 ============ */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 1rem;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      border: 1px solid transparent;
      transition: all var(--transition);
      white-space: nowrap;
      line-height: 1.5;
    }
    .btn-primary {
      background: var(--accent);
      color: #121418;
      box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      color: #121418;
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(245,165,36,0.4);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: var(--shadow-btn);
    }
    .btn-secondary {
      background: transparent;
      color: var(--accent);
      border-color: var(--accent);
    }
    .btn-secondary:hover {
      background: var(--accent-subtle);
      color: var(--accent-light);
      border-color: var(--accent-light);
    }
    .btn-secondary:active {
      background: rgba(245, 165, 36, 0.2);
    }
    .btn-lg {
      padding: 14px 28px;
      font-size: 1.05rem;
    }
    /* ============ 分类说明栏 ============ */
    .intro-bar {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 22px 24px;
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: flex-start;
      justify-content: space-between;
    }
    .intro-bar .intro-text {
      flex: 1 1 560px;
      font-size: 0.95rem;
      line-height: 1.75;
      color: var(--text-gray);
    }
    .intro-bar .intro-stat {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
      flex-shrink: 0;
    }
    .intro-stat .stat-item {
      text-align: center;
      min-width: 80px;
    }
    .intro-stat .stat-number {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }
    .intro-stat .stat-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 4px;
    }
    /* ============ 专题卡片列表 ============ */
    .topic-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .topic-card {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 24px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    }
    .topic-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }
    .topic-card .topic-thumb {
      position: relative;
      min-height: 100%;
      background: var(--bg-secondary);
    }
    .topic-card .topic-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      aspect-ratio: 16 / 9;
    }
    .topic-card .topic-body {
      padding: 20px 24px 20px 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .topic-card .topic-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      font-weight: 500;
      color: var(--accent);
      background: var(--accent-subtle);
      border-radius: var(--radius-badge);
      padding: 4px 10px;
      margin-bottom: 10px;
    }
    .topic-card .topic-title {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .topic-card .topic-meta {
      font-size: 0.875rem;
      color: var(--text-muted);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .topic-card .topic-meta span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    /* ============ 筛选工具条 ============ */
    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 28px;
    }
    .filter-chip {
      padding: 8px 18px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--bg-card);
      color: var(--text-gray);
      font-size: 0.875rem;
      font-weight: 500;
      transition: all var(--transition);
    }
    .filter-chip:hover {
      border-color: var(--accent);
      color: var(--accent-light);
    }
    .filter-chip.active {
      background: var(--accent);
      color: #121418;
      border-color: var(--accent);
      font-weight: 600;
    }
    /* ============ 精选推荐横向滚动 ============ */
    .scroll-row {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: 260px;
      gap: 18px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .scroll-row::-webkit-scrollbar {
      height: 6px;
    }
    .scroll-row::-webkit-scrollbar-track {
      background: var(--bg-card);
      border-radius: 3px;
    }
    .scroll-row::-webkit-scrollbar-thumb {
      background: var(--gray-line);
      border-radius: 3px;
    }
    .scroll-row::-webkit-scrollbar-thumb:hover {
      background: var(--accent);
    }
    .mini-card {
      scroll-snap-align: start;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
      display: block;
    }
    .mini-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
      color: var(--text-gray);
    }
    .mini-card img {
      width: 100%;
      aspect-ratio: 3 / 2;
      object-fit: cover;
    }
    .mini-card .mini-info {
      padding: 14px 16px;
    }
    .mini-card .mini-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 4px;
      line-height: 1.4;
    }
    .mini-card .mini-count {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    /* ============ 下载 CTA ============ */
    .download-cta {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 32px 36px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .download-cta .cta-text h3 {
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .download-cta .cta-text p {
      font-size: 0.95rem;
      color: var(--text-gray);
      margin-bottom: 0;
    }
    /* ============ FAQ ============ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 800px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: border-color var(--transition);
    }
    .faq-item:hover {
      border-color: var(--gray-line);
    }
    .faq-item.open {
      border-color: var(--accent);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 16px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-heading);
      text-align: left;
      background: transparent;
      border: none;
      cursor: pointer;
      transition: color var(--transition);
    }
    .faq-question:hover {
      color: var(--accent-light);
    }
    .faq-question .faq-icon {
      width: 24px;
      height: 24px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      background: var(--bg-secondary);
      color: var(--accent);
      font-size: 1.125rem;
      line-height: 1;
      transition: transform var(--transition);
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }
    .faq-answer-inner {
      padding: 0 20px 18px;
      font-size: 0.875rem;
      color: var(--text-gray);
      line-height: 1.75;
    }
    /* ============ 查看更多 ============ */
    .view-more-wrap {
      display: flex;
      justify-content: center;
      padding: 12px 0;
    }
    /* ============ 页脚 ============ */
    .site-footer {
      background: var(--bg-footer);
      padding: 64px 0 24px;
      border-top: 1px solid var(--border);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-brand .logo {
      margin-bottom: 16px;
      display: inline-flex;
    }
    .footer-brand p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 280px;
      margin-bottom: 0;
    }
    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      font-size: 0.875rem;
      color: var(--text-muted);
      transition: color var(--transition);
    }
    .footer-col ul li a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid var(--divider);
      padding-top: 20px;
      text-align: center;
    }
    .footer-bottom p {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }
    /* ============ 响应式 ============ */
    @media (max-width: 1024px) {
      .topic-card {
        grid-template-columns: 260px 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 16px 24px 24px;
        border-bottom: 1px solid var(--border);
        display: none;
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-menu a {
        padding: 12px 0;
        font-size: 1.125rem;
        border-bottom: 1px solid var(--divider);
        width: 100%;
      }
      .nav-menu a.active,
      .nav-menu a:hover {
        border-bottom-color: var(--accent);
      }
      .nav-toggle {
        display: flex;
      }
      .section {
        padding: var(--section-padding-mobile);
      }
      .topic-card {
        grid-template-columns: 1fr;
      }
      .topic-card .topic-body {
        padding: 18px 20px;
      }
      .topic-card .topic-thumb img {
        aspect-ratio: 16 / 9;
      }
      .intro-bar {
        flex-direction: column;
      }
      .intro-bar .intro-stat {
        width: 100%;
        justify-content: space-around;
      }
      .download-cta {
        flex-direction: column;
        text-align: center;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
      .footer-brand {
        grid-column: 1 / -1;
      }
      .scroll-row {
        grid-auto-columns: 78vw;
      }
    }
    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }
      .section {
        padding: 32px 0;
      }
      .section-heading {
        font-size: 1.5rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .download-cta {
        padding: 24px 20px;
      }
      .scroll-row {
        grid-auto-columns: 78vw;
      }
      .breadcrumb-section {
        padding: 24px 0 16px;
      }
    }

/* roulang page: article */
:root {
    --bg-primary: #121418;
    --bg-secondary: #1A1E24;
    --bg-card: #1F242C;
    --bg-footer: #0D0F12;
    --accent: #F5A524;
    --accent-hover: #D99516;
    --accent-light: #FBD38D;
    --accent-subtle: rgba(245, 165, 36, 0.1);
    --accent-glow: rgba(245, 165, 36, 0.06);
    --gray-line: #3D4552;
    --text-gray: #B8C0CC;
    --text-heading: #F5F7FA;
    --text-muted: #78828F;
    --green: #4ADE80;
    --rating: #FBBF24;
    --border: #2A303A;
    --divider: #262C35;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-img: 10px;
    --radius-badge: 4px;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.35);
    --shadow-card-hover: 0 6px 24px rgba(0,0,0,0.45);
    --shadow-btn: 0 2px 8px rgba(245,165,36,0.3);
    --transition: 0.2s ease;
    --container-max: 1200px;
    --section-padding: 64px 0;
    --section-padding-mobile: 40px 0;
    --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  }
  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }
  body {
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.75;
    color: var(--text-gray);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding-top: 64px;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
  }
  a:hover {
    color: var(--accent-light);
  }
  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 2px;
  }
  button {
    font-family: var(--font-family);
    cursor: pointer;
    border: none;
    background: none;
    transition: all var(--transition);
  }
  button:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 2px;
  }
  .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
  }
  /* ============ 导航 ============ */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(18,20,24,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: 64px;
    display: flex;
    align-items: center;
  }
  .site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
  }
  .logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-heading);
    white-space: nowrap;
    letter-spacing: 0.01em;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .logo .logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #121418;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
  }
  .logo:hover {
    color: var(--accent);
  }
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
    flex-wrap: wrap;
  }
  .nav-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-gray);
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition);
  }
  .nav-menu a:hover,
  .nav-menu a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
  }
  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all var(--transition);
  }
  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-gray);
    border-radius: 2px;
    transition: all var(--transition);
  }
  .nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
  /* ============ 按钮 ============ */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-btn);
    border: 1px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1.5;
  }
  .btn-primary {
    background: var(--accent);
    color: #121418;
    box-shadow: var(--shadow-btn);
  }
  .btn-primary:hover {
    background: var(--accent-hover);
    color: #121418;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(245,165,36,0.4);
  }
  .btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-btn);
  }
  .btn-secondary {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent);
  }
  .btn-secondary:hover {
    background: var(--accent-subtle);
    color: var(--accent-light);
    border-color: var(--accent-light);
  }
  .btn-secondary:active {
    background: rgba(245, 165, 36, 0.2);
  }
  .btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
  }
  /* ============ 面包屑 ============ */
  .breadcrumb-zone {
    padding: 28px 0 16px;
    background: var(--bg-primary);
  }
  .breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-muted);
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .breadcrumb li {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .breadcrumb li + li::before {
    content: "/";
    color: var(--text-muted);
    margin-right: 6px;
    opacity: 0.6;
  }
  .breadcrumb a {
    color: var(--text-gray);
  }
  .breadcrumb a:hover {
    color: var(--accent-light);
  }
  .breadcrumb .current {
    color: var(--text-heading);
    font-weight: 500;
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  /* ============ 文章标题区 ============ */
  .article-title-zone {
    padding: 16px 0 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--divider);
  }
  .article-title-zone h1 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
  }
  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 20px;
    font-size: 0.875rem;
    color: var(--text-muted);
  }
  .article-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .article-meta .meta-label {
    color: var(--text-muted);
    opacity: 0.75;
  }
  .article-meta .meta-value {
    color: var(--text-gray);
  }
  .article-meta .tag-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-badge);
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid rgba(245,165,36,0.25);
  }
  /* ============ 文章布局 ============ */
  .article-layout {
    padding: 40px 0 0;
    background: var(--bg-secondary);
  }
  .article-layout .container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
    align-items: start;
  }
  .article-main {
    min-width: 0;
  }
  .article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 80px;
  }
  /* ============ 正文阅读区 ============ */
  .article-body {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 32px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-gray);
  }
  .article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--text-heading);
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--divider);
  }
  .article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-heading);
    margin: 24px 0 12px;
  }
  .article-body p {
    margin: 0 0 16px;
    line-height: 1.85;
  }
  .article-body ul,
  .article-body ol {
    margin: 0 0 16px 20px;
    padding: 0;
  }
  .article-body li {
    margin-bottom: 8px;
    line-height: 1.75;
  }
  .article-body blockquote {
    margin: 16px 0 20px;
    padding: 12px 20px;
    border-left: 3px solid var(--accent);
    background: var(--accent-subtle);
    color: var(--text-gray);
    border-radius: 0 var(--radius-img) var(--radius-img) 0;
    font-size: 0.9375rem;
  }
  .article-body img {
    border-radius: var(--radius-img);
    margin: 16px 0;
    width: 100%;
    border: 1px solid var(--border);
  }
  .article-body code {
    display: block;
    background: var(--bg-primary);
    border: 1px solid var(--divider);
    border-radius: var(--radius-btn);
    padding: 12px 16px;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--accent-light);
    margin: 16px 0;
    overflow-x: auto;
  }
  .article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .article-body a:hover {
    color: var(--accent-light);
  }
  .article-body .empty-article {
    text-align: center;
    padding: 48px 24px;
  }
  .article-body .empty-article h2 {
    font-size: 1.5rem;
    color: var(--text-heading);
    margin-bottom: 12px;
    border: none;
    padding: 0;
  }
  .article-body .empty-article p {
    color: var(--text-muted);
    margin-bottom: 20px;
  }
  /* ============ 下载转化卡 ============ */
  .download-banner {
    margin: 24px 0 0;
    border-radius: var(--radius-card);
    padding: 36px 32px;
    background: var(--bg-footer);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }
  .download-banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(245,165,36,0.12) 0%, transparent 45%, transparent 100%);
    pointer-events: none;
  }
  .download-banner-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
  }
  .download-banner-text h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
  }
  .download-banner-text p {
    font-size: 0.9375rem;
    color: var(--text-gray);
    margin: 0;
    max-width: 400px;
  }
  /* ============ 相关推荐 ============ */
  .related-section {
    margin: 32px 0 0;
  }
  .related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
  }
  .related-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
    margin: 0;
  }
  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .related-card {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
    display: block;
  }
  .related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent);
    color: var(--text-gray);
  }
  .related-card img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: var(--radius-card) var(--radius-card) 0 0;
  }
  .related-card-body {
    padding: 16px;
  }
  .related-card-body h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 0 0 8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 48px;
  }
  .related-card-body .related-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-subtle);
    border-radius: var(--radius-badge);
    padding: 2px 8px;
    margin-top: 4px;
  }
  /* ============ 返回入口 ============ */
  .back-entry {
    margin: 24px 0 0;
    display: flex;
    justify-content: center;
  }
  .back-entry .btn {
    min-width: 240px;
  }
  /* ============ 前后篇导航 ============ */
  .prev-next-nav {
    margin: 24px 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: space-between;
  }
  .prev-next-nav a,
  .prev-next-nav .disabled {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9375rem;
    padding: 14px 20px;
    border-radius: var(--radius-btn);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-gray);
    transition: all var(--transition);
    flex: 1;
    min-width: 200px;
    justify-content: center;
    text-align: center;
  }
  .prev-next-nav a:hover {
    border-color: var(--accent);
    color: var(--accent-light);
    background: var(--accent-subtle);
  }
  .prev-next-nav .disabled {
    opacity: 0.45;
    cursor: default;
  }
  /* ============ 侧边栏 ============ */
  .sidebar-widget {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
  }
  .sidebar-widget h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--divider);
  }
  .sidebar-news-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .sidebar-news-list li {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .sidebar-news-list a {
    font-size: 0.9375rem;
    color: var(--text-gray);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition);
  }
  .sidebar-news-list a:hover {
    color: var(--accent-light);
  }
  .sidebar-news-list .news-time {
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  /* ============ 页脚 ============ */
  .site-footer {
    background: var(--bg-footer);
    padding: 48px 0 24px;
    border-top: 1px solid var(--border);
    margin-top: 48px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }
  .footer-brand .logo {
    font-size: 1.125rem;
    margin-bottom: 12px;
  }
  .footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
  }
  .footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 0 0 14px;
  }
  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .footer-col ul li a {
    font-size: 0.875rem;
    color: var(--text-gray);
  }
  .footer-col ul li a:hover {
    color: var(--accent-light);
  }
  .footer-bottom {
    border-top: 1px solid var(--divider);
    padding-top: 20px;
    text-align: center;
  }
  .footer-bottom p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
  }
  /* ============ 响应式 ============ */
  @media (max-width: 1024px) {
    .article-layout .container {
      grid-template-columns: 1fr;
    }
    .article-sidebar {
      position: static;
      margin-top: 24px;
    }
    .related-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (max-width: 768px) {
    .nav-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: var(--bg-card);
      padding: 24px;
      flex-direction: column;
      align-items: flex-start;
      gap: 24px;
      border-bottom: 1px solid var(--border);
      z-index: 999;
    }
    .nav-menu.open {
      display: flex;
    }
    .nav-menu a {
      font-size: 1.125rem;
      border-bottom: 2px solid transparent;
    }
    .nav-toggle {
      display: flex;
    }
    .article-body {
      padding: 20px;
    }
    .related-grid {
      grid-template-columns: 1fr;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
    .footer-brand {
      grid-column: 1 / -1;
    }
    .article-title-zone h1 {
      font-size: 1.75rem;
    }
    .download-banner {
      padding: 24px 20px;
    }
    .download-banner-content {
      flex-direction: column;
      align-items: flex-start;
    }
  }
  @media (max-width: 520px) {
    .container {
      padding: 0 16px;
    }
    .article-body {
      padding: 16px;
      font-size: 0.9375rem;
    }
    .related-grid {
      grid-template-columns: 1fr;
    }
    .footer-grid {
      grid-template-columns: 1fr;
    }
    .prev-next-nav {
      flex-direction: column;
    }
    .prev-next-nav a,
    .prev-next-nav .disabled {
      min-width: 100%;
    }
    .article-meta {
      gap: 6px 14px;
      font-size: 0.8125rem;
    }
    .breadcrumb {
      font-size: 0.8125rem;
    }
    .breadcrumb .current {
      max-width: 160px;
    }
    .article-title-zone h1 {
      font-size: 1.5rem;
    }
  }

/* roulang page: category2 */
:root {
  --bg-primary: #121418;
  --bg-secondary: #1A1E24;
  --bg-card: #1F242C;
  --bg-footer: #0D0F12;
  --accent: #F5A524;
  --accent-hover: #D99516;
  --accent-light: #FBD38D;
  --accent-subtle: rgba(245, 165, 36, 0.1);
  --accent-glow: rgba(245, 165, 36, 0.06);
  --gray-line: #3D4552;
  --text-gray: #B8C0CC;
  --text-heading: #F5F7FA;
  --text-muted: #78828F;
  --green: #4ADE80;
  --rating: #FBBF24;
  --border: #2A303A;
  --divider: #262C35;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-img: 10px;
  --radius-badge: 4px;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.35);
  --shadow-card-hover: 0 6px 24px rgba(0,0,0,0.45);
  --shadow-btn: 0 2px 8px rgba(245,165,36,0.3);
  --transition: 0.2s ease;
  --container-max: 1200px;
  --section-padding: 64px 0;
  --section-padding-mobile: 40px 0;
  --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-gray);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--text-gray);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}
a:hover {
  color: var(--accent-light);
}
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}
button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition);
}
button:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(18,20,24,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}
.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-heading);
  white-space: nowrap;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo .logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #121418;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}
.logo:hover {
  color: var(--accent);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.nav-menu a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-gray);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all var(--transition);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-gray);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ============ 分类页 Hero 面包屑 ============ */
.category-hero {
  padding: 120px 0 40px;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}
.category-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--accent-glow) 0%, transparent 45%, transparent 100%);
  pointer-events: none;
}
.category-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb-nav a {
  color: var(--text-muted);
  transition: color var(--transition);
}
.breadcrumb-nav a:hover {
  color: var(--accent-light);
}
.breadcrumb-nav .separator {
  color: var(--gray-line);
  padding: 0 4px;
}
.breadcrumb-nav .current {
  color: var(--accent);
}
.category-hero h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-heading);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.category-hero .category-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-gray);
  max-width: 760px;
  margin-bottom: 0;
}

/* ============ Section 通用 ============ */
.section {
  padding: var(--section-padding);
}
.section-alt {
  background: var(--bg-secondary);
}
.section-dark {
  background: var(--bg-primary);
}
.section-title {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.25;
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 640px;
}

/* ============ 教程分类导航入口 ============ */
.tutorial-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}
.tutorial-tab {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-gray);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  transition: all var(--transition);
  cursor: pointer;
}
.tutorial-tab:hover {
  color: var(--accent-light);
  border-color: var(--accent);
}
.tutorial-tab.active {
  background: var(--accent);
  color: #121418;
  border-color: var(--accent);
  font-weight: 600;
}
.tutorial-tab:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}

/* ============ 教程列表编号卡片 ============ */
.tutorial-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.tutorial-item {
  display: flex;
  gap: 28px;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.tutorial-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.tutorial-number {
  font-size: 2.25rem;
  font-weight: 300;
  color: rgba(245, 165, 36, 0.35);
  line-height: 1;
  min-width: 64px;
  letter-spacing: -0.02em;
}
.tutorial-content {
  flex: 1;
}
.tutorial-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
  line-height: 1.4;
}
.tutorial-content h3 a {
  color: var(--text-heading);
  transition: color var(--transition);
}
.tutorial-content h3 a:hover {
  color: var(--accent);
}
.tutorial-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 12px;
}
.tutorial-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition);
}
.tutorial-link:hover {
  color: var(--accent-light);
}
.empty-state {
  text-align: center;
  padding: 36px 20px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============ 热门教程推荐卡片 ============ */
.tutorial-popular-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tutorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}
.tutorial-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.tutorial-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.tutorial-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.tutorial-card:hover .tutorial-card-img img {
  transform: scale(1.04);
}
.tutorial-card-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.tutorial-card-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
  line-height: 1.4;
}
.tutorial-card-body h3 a {
  color: var(--text-heading);
  transition: color var(--transition);
}
.tutorial-card-body h3 a:hover {
  color: var(--accent);
}
.tutorial-card-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
  flex: 1;
}
.tutorial-card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  align-self: flex-start;
  transition: color var(--transition);
}
.tutorial-card-link:hover {
  color: var(--accent-light);
}

/* ============ 软件下载卡 ============ */
.download-card-section {
  background: var(--bg-primary);
}
.download-card {
  background: linear-gradient(135deg, #1F242C 0%, #191D23 55%, #14171B 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 40px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.download-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(245,165,36,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.download-card-text {
  flex: 1;
  min-width: 280px;
  position: relative;
  z-index: 1;
}
.download-card-text h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.download-card-text p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.7;
  margin-bottom: 0;
}
.download-card-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* ============ 帮助支持栏 ============ */
.help-support-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.help-support-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.help-support-text {
  font-size: 0.95rem;
  color: var(--text-gray);
  max-width: 600px;
}
.help-support-text strong {
  color: var(--text-heading);
}
.help-support-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ============ 资讯列表 ============ */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.news-item {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 14px;
  transition: all var(--transition);
}
.news-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card);
}
.news-thumb {
  width: 120px;
  height: 80px;
  flex-shrink: 0;
  border-radius: var(--radius-img);
  overflow: hidden;
  background: var(--bg-secondary);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-body {
  flex: 1;
  min-width: 0;
}
.news-body h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 6px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-body h4 a {
  color: var(--text-heading);
  transition: color var(--transition);
}
.news-body h4 a:hover {
  color: var(--accent);
}
.news-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.news-meta .badge-tag {
  background: var(--accent-subtle);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: var(--radius-badge);
  font-weight: 500;
}
.news-meta .news-date {
  color: var(--text-muted);
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--bg-footer);
  padding: 56px 0 24px;
  border-top: 1px solid var(--divider);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 14px;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-col ul li a:hover {
  color: var(--accent-light);
}
.footer-bottom {
  border-top: 1px solid var(--divider);
  padding-top: 20px;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.5;
}
.btn-primary {
  background: var(--accent);
  color: #121418;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #121418;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245,165,36,0.4);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-btn);
}
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-secondary:hover {
  background: var(--accent-subtle);
  color: var(--accent-light);
  border-color: var(--accent-light);
}
.btn-secondary:active {
  background: rgba(245, 165, 36, 0.2);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .tutorial-popular-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(18,20,24,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-menu a {
    font-size: 1.05rem;
  }
  .nav-toggle {
    display: flex;
  }
  .category-hero {
    padding: 100px 0 32px;
  }
  .section {
    padding: var(--section-padding-mobile);
  }
  .tutorial-item {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }
  .tutorial-number {
    font-size: 1.75rem;
    min-width: auto;
  }
  .tutorial-popular-grid {
    grid-template-columns: 1fr;
  }
  .download-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px;
  }
  .help-support-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-thumb {
    width: 100px;
    height: 68px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}
@media (max-width: 480px) {
  .section {
    padding: 32px 0;
  }
  .container {
    padding: 0 16px;
  }
  .category-hero {
    padding: 88px 0 24px;
  }
  .tutorial-tabs {
    gap: 8px;
  }
  .tutorial-tab {
    padding: 6px 14px;
    font-size: 0.8rem;
  }
  .news-item {
    flex-direction: column;
  }
  .news-thumb {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }
}

/* roulang page: category3 */
:root {
    --bg-primary: #121418;
    --bg-secondary: #1A1E24;
    --bg-card: #1F242C;
    --bg-footer: #0D0F12;
    --accent: #F5A524;
    --accent-hover: #D99516;
    --accent-light: #FBD38D;
    --accent-subtle: rgba(245, 165, 36, 0.1);
    --accent-glow: rgba(245, 165, 36, 0.06);
    --gray-line: #3D4552;
    --text-gray: #B8C0CC;
    --text-heading: #F5F7FA;
    --text-muted: #78828F;
    --green: #4ADE80;
    --rating: #FBBF24;
    --border: #2A303A;
    --divider: #262C35;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-img: 10px;
    --radius-badge: 4px;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.35);
    --shadow-card-hover: 0 6px 24px rgba(0,0,0,0.45);
    --shadow-btn: 0 2px 8px rgba(245,165,36,0.3);
    --transition: 0.2s ease;
    --container-max: 1200px;
    --section-padding: 64px 0;
    --section-padding-mobile: 40px 0;
    --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }

  body {
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.75;
    color: var(--text-gray);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

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

  a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
  }

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

  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 2px;
  }

  button {
    font-family: var(--font-family);
    cursor: pointer;
    border: none;
    background: none;
    transition: all var(--transition);
  }

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

  .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ============ 导航 ============ */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(18,20,24,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: 64px;
    display: flex;
    align-items: center;
  }

  .site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
  }

  .logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-heading);
    white-space: nowrap;
    letter-spacing: 0.01em;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .logo .logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #121418;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
  }

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

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

  .nav-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-gray);
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition);
  }

  .nav-menu a:hover,
  .nav-menu a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
  }

  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all var(--transition);
  }

  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-gray);
    border-radius: 2px;
    transition: all var(--transition);
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

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

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* ============ 分类页头部 ============ */
  .category-hero {
    padding: 120px 0 48px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
  }

  .category-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, var(--accent-glow) 0%, transparent 45%, transparent 100%);
    pointer-events: none;
  }

  .category-hero .container {
    position: relative;
    z-index: 1;
  }

  .breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    flex-wrap: wrap;
  }

  .breadcrumb-nav a {
    color: var(--text-muted);
    transition: color var(--transition);
  }

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

  .breadcrumb-nav .separator {
    color: var(--gray-line);
  }

  .breadcrumb-nav .current {
    color: var(--accent);
    font-weight: 500;
  }

  .category-hero h1 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-heading);
    margin-bottom: 14px;
    letter-spacing: -0.005em;
  }

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

  .category-desc {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-gray);
    max-width: 680px;
    margin-bottom: 0;
  }

  /* ============ 板块通用 ============ */
  section {
    padding: var(--section-padding);
  }

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

  .section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
  }

  .section-heading h2 {
    font-size: clamp(1.5rem, 2.5vw, 1.875rem);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0;
    line-height: 1.3;
  }

  .section-heading .heading-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-subtle);
    border: 1px solid rgba(245,165,36,0.25);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 8px;
  }

  .section-heading p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0;
    max-width: 480px;
  }

  /* ============ 按钮 ============ */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-btn);
    border: 1px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1.5;
  }

  .btn-primary {
    background: var(--accent);
    color: #121418;
    box-shadow: var(--shadow-btn);
  }

  .btn-primary:hover {
    background: var(--accent-hover);
    color: #121418;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(245,165,36,0.4);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-btn);
  }

  .btn-secondary {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent);
  }

  .btn-secondary:hover {
    background: var(--accent-subtle);
    color: var(--accent-light);
    border-color: var(--accent-light);
  }

  .btn-secondary:active {
    background: rgba(245, 165, 36, 0.2);
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
  }

  /* ============ 统计概览 ============ */
  .stats-overview {
    padding: 40px 0 64px;
    background: var(--bg-primary);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

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

  .stat-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-card-hover);
  }

  .stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
  }

  /* ============ 影单卡片列表 ============ */
  .collection-grid-section {
    background: var(--bg-secondary);
  }

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

  .collection-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
  }

  .collection-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
  }

  .collection-card-image {
    width: 100%;
    aspect-ratio: 3/2;
    overflow: hidden;
    position: relative;
    background: var(--bg-secondary);
  }

  .collection-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
  }

  .collection-card:hover .collection-card-image img {
    transform: scale(1.03);
  }

  .collection-card-body {
    padding: 18px 20px 20px;
  }

  .collection-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 8px;
    line-height: 1.4;
  }

  .collection-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
  }

  .collection-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-subtle);
    padding: 3px 10px;
    border-radius: var(--radius-badge);
    border: 1px solid rgba(245,165,36,0.2);
  }

  .collection-count {
    font-size: 0.8rem;
    color: var(--text-muted);
  }

  .collection-update {
    font-size: 0.8rem;
    color: var(--text-muted);
  }

  /* ============ 标签筛选 ============ */
  .tag-filter-section {
    background: var(--bg-primary);
    padding: 48px 0;
  }

  .tag-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .tag-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-gray);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 8px 18px;
    transition: all var(--transition);
  }

  .tag-filter-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-subtle);
  }

  .tag-filter-btn.active {
    color: #121418;
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 600;
  }

  /* ============ 相关推荐 ============ */
  .related-section {
    background: var(--bg-secondary);
  }

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

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

  .related-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-card-hover);
  }

  .related-card-image {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--bg-secondary);
  }

  .related-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
  }

  .related-card:hover .related-card-image img {
    transform: scale(1.03);
  }

  .related-card-body {
    padding: 16px 18px;
  }

  .related-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 6px;
    line-height: 1.4;
  }

  .related-card-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
  }

  /* ============ 会员转化 CTA ============ */
  .member-cta-section {
    background: var(--bg-primary);
  }

  .member-cta-box {
    background: linear-gradient(135deg, #1F242C 0%, #1A1E24 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 40px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-card);
  }

  .member-cta-content h2 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
  }

  .member-cta-content p {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0;
    max-width: 520px;
  }

  .member-cta-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
  }

  /* ============ 底部快速入口 ============ */
  .quick-links-section {
    background: var(--bg-secondary);
    padding: 48px 0;
  }

  .quick-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .quick-link-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-gray);
    transition: all var(--transition);
  }

  .quick-link-item:hover {
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--shadow-card-hover);
  }

  .quick-link-item .link-icon {
    font-size: 1.25rem;
  }

  /* ============ 查看更多按钮区 ============ */
  .view-more-section {
    background: var(--bg-secondary);
    padding: 0 0 64px;
    text-align: center;
  }

  .view-more-section .btn {
    min-width: 200px;
  }

  /* ============ 页脚 ============ */
  .site-footer {
    background: var(--bg-footer);
    padding: 48px 0 24px;
    border-top: 1px solid var(--border);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }

  .footer-brand .logo {
    margin-bottom: 12px;
    display: flex;
  }

  .footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    max-width: 320px;
    line-height: 1.7;
  }

  .footer-col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 14px;
  }

  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .footer-col ul li {
    margin-bottom: 8px;
  }

  .footer-col ul li a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition);
  }

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

  .footer-bottom {
    border-top: 1px solid var(--divider);
    padding-top: 20px;
    text-align: center;
  }

  .footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0;
  }

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

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

  @media (max-width: 768px) {
    .site-header {
      height: 60px;
    }

    .nav-menu {
      position: fixed;
      top: 60px;
      left: 0;
      right: 0;
      background: rgba(18,20,24,0.97);
      backdrop-filter: blur(12px);
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      padding: 16px 24px;
      border-bottom: 1px solid var(--border);
      display: none;
      max-height: calc(100vh - 60px);
      overflow-y: auto;
    }

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

    .nav-menu a {
      display: block;
      width: 100%;
      padding: 14px 0;
      font-size: 1.05rem;
      border-bottom: 1px solid var(--divider);
    }

    .nav-menu a:last-child {
      border-bottom: none;
    }

    .nav-menu a.active,
    .nav-menu a:hover {
      border-bottom-color: var(--accent);
    }

    .nav-toggle {
      display: flex;
    }

    .category-hero {
      padding: 100px 0 40px;
    }

    section {
      padding: var(--section-padding-mobile);
    }

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

    .related-scroll {
      grid-template-columns: 1fr;
      gap: 16px;
    }

    .quick-links {
      grid-template-columns: 1fr;
      gap: 12px;
    }

    .stats-grid {
      gap: 12px;
    }

    .stat-card {
      padding: 16px;
    }

    .stat-number {
      font-size: 1.5rem;
    }

    .member-cta-box {
      flex-direction: column;
      align-items: flex-start;
      padding: 28px 20px;
    }

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

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

    .category-hero h1 {
      font-size: 1.5rem;
    }

    .category-desc {
      font-size: 0.875rem;
    }

    .stats-grid {
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .stat-number {
      font-size: 1.25rem;
    }

    .stat-label {
      font-size: 0.75rem;
    }

    .member-cta-actions {
      width: 100%;
      flex-direction: column;
      gap: 10px;
    }

    .member-cta-actions .btn {
      width: 100%;
    }

    .view-more-section .btn {
      width: 100%;
    }
  }