/* ==========================================================================
   西游云 (xiyou.lol) 核心样式表
   风格体系：现代新中式宣纸白 (Neo-Chinese Parchment) × 琥珀金 (Sovereign Amber) × 霁蓝 (Sky Cyan)
   严格无第三方重型库，纯原生 CSS，秒开加载，完美支持昼夜模式与移动端自适应
   ========================================================================== */

:root {
  /* 基础主色调（新中式宣纸白 Parchment & Ink） */
  --bg-primary: #fcfbf9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f5f4ef;
  --bg-card: rgba(255, 255, 255, 0.92);
  --bg-card-hover: #ffffff;
  --border-color: #e5e3dc;
  --border-color-focus: #d97706;

  /* 墨色文字梯队 */
  --text-primary: #0f172a;       /* 浓墨 slate */
  --text-secondary: #475569;     /* 沉灰 stone */
  --text-muted: #94a3b8;         /* 淡黛 */
  --text-inverse: #ffffff;

  /* 主题色系：琥珀金 (Primary Amber) 与 霁蓝 (Secondary Sky) */
  --amber-primary: #d97706;
  --amber-hover: #b45309;
  --amber-light: #fef3c7;
  --amber-gradient: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
  --amber-glow: rgba(217, 119, 6, 0.18);

  --sky-primary: #0ea5e9;
  --sky-hover: #0284c7;
  --sky-light: #e0f2fe;
  --sky-gradient: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);
  --sky-glow: rgba(14, 165, 233, 0.18);

  --success: #10b981;
  --success-bg: #ecfdf5;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.06), 0 2px 4px -1px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 20px 38px -6px rgba(15, 23, 42, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --header-bg: rgba(252, 251, 249, 0.88);
  --header-border: rgba(229, 227, 220, 0.8);
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 沉浸式夜间模式（深墨黛底，琥珀金与霁蓝荧光） */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2234;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(26, 34, 52, 0.95);
  --border-color: #243048;
  --border-color-focus: #f59e0b;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --text-inverse: #0b0f19;

  --amber-primary: #f59e0b;
  --amber-hover: #fbbf24;
  --amber-light: rgba(245, 158, 11, 0.16);
  --amber-glow: rgba(245, 158, 11, 0.25);

  --sky-primary: #38bdf8;
  --sky-hover: #7dd3fc;
  --sky-light: rgba(56, 189, 248, 0.16);
  --sky-glow: rgba(56, 189, 248, 0.25);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 38px -6px rgba(0, 0, 0, 0.7);

  --header-bg: rgba(11, 15, 25, 0.9);
  --header-border: rgba(36, 48, 72, 0.8);
}

/* 全局重置与平滑滚动 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 柔和角隅流光 (Subtle Amber-Gold & Sky-Cyan Mesh) */
.ambient-glow-amber {
  position: fixed;
  top: -120px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--amber-glow) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
  z-index: -1;
  animation: drift 18s ease-in-out infinite alternate;
}

.ambient-glow-sky {
  position: fixed;
  top: 180px;
  left: -150px;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, var(--sky-glow) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
  z-index: -1;
  animation: drift 22s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.1); }
}

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

/* 导航栏 (Sticky Navbar) */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--header-border);
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: opacity var(--transition-fast);
}

.logo-light {
  display: block;
}

.logo-dark {
  display: none;
}

[data-theme="dark"] .logo-light {
  display: none;
}

[data-theme="dark"] .logo-dark {
  display: block;
}

/* 极简几何云环标志 (Minimalist Geometric Cloud-Ring Logo) */
.brand-symbol {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--amber-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px var(--amber-glow);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 26px;
}

/* 导航项与琥珀金悬停动效下划线 */
.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 550;
  font-size: 0.94rem;
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--amber-primary);
  border-radius: 2px;
  transition: width 0.25s ease;
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav-badge-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  background: var(--amber-light);
  color: var(--amber-primary);
  border-radius: var(--radius-full);
  margin-left: 4px;
  vertical-align: middle;
}

/* 头部右侧功能区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 中英文简易切换装饰胶囊 (CN | EN) */
.lang-switcher-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(125, 125, 125, 0.08);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.lang-active {
  color: var(--amber-primary);
}

/* 昼夜模式切换按钮（半透明磨砂、精细专业、纯SVG无粗糙表情） */
.theme-toggle-btn {
  background: rgba(125, 125, 125, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  background: rgba(125, 125, 125, 0.15);
  color: var(--amber-primary);
  border-color: var(--border-color-focus);
  transform: rotate(15deg);
}

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
  transition: transform var(--transition-smooth);
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

/* 琥珀金主按钮 */
.btn-amber {
  background: var(--amber-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--amber-glow);
}

.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px var(--amber-glow);
  filter: brightness(1.05);
}

/* 霁蓝辅助按钮 */
.btn-sky {
  background: var(--sky-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--sky-glow);
}

.btn-sky:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px var(--sky-glow);
  filter: brightness(1.05);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--amber-primary);
  color: var(--amber-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 13px 30px;
  font-size: 1.02rem;
}

.btn-block {
  width: 100%;
}

/* 主视觉区 (Hero Section) */
.hero-section {
  padding: 75px 0 50px;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: var(--amber-light);
  color: var(--amber-primary);
  font-size: 0.86rem;
  font-weight: 650;
  margin-bottom: 24px;
  border: 1px solid rgba(217, 119, 6, 0.25);
  box-shadow: var(--shadow-sm);
}

.signal-wave-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 850;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 18px;
}

.hero-title-brand {
  background: var(--amber-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.22rem;
  color: var(--text-primary);
  font-weight: 600;
  max-width: 820px;
  margin: 0 auto 12px;
}

.hero-intro {
  font-size: 1.02rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 34px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 44px;
}

/* 3-Column 动画指标行 */
.hero-metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 860px;
  margin: 0 auto 32px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
}

.metric-col {
  text-align: center;
}

.metric-val {
  font-size: 2.1rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 4px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.metric-val .val-highlight {
  color: var(--amber-primary);
}

.metric-title {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 交互式西游航线实时测速条 (Interactive Westward Route Strip) */
.route-strip-box {
  max-width: 920px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 22px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.route-strip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.86rem;
}

.route-strip-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  color: var(--text-primary);
}

.route-status-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--success);
  font-weight: 600;
  font-size: 0.82rem;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.route-hubs-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.route-hub-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.route-hub-btn:hover,
.route-hub-btn.active {
  border-color: var(--amber-primary);
  background: var(--amber-light);
  transform: translateY(-2px);
}

[data-theme="dark"] .route-hub-btn:hover,
[data-theme="dark"] .route-hub-btn.active {
  background: rgba(245, 158, 11, 0.15);
}

.hub-name {
  font-size: 0.86rem;
  font-weight: 650;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.hub-ping {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
}

/* 通用区块排版 */
.section {
  padding: 76px 0;
}

.section-alt {
  background-color: var(--bg-tertiary);
  transition: background-color var(--transition-smooth);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 46px;
}

.section-tag {
  color: var(--amber-primary);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.section-description {
  font-size: 1.02rem;
  color: var(--text-secondary);
}

/* Bento 核心优势图卡 (3张图文卡，纯技术硬核线框图标) */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
  position: relative;
}

.bento-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-color-focus);
  box-shadow: var(--shadow-xl);
  background: var(--bg-card-hover);
}

.bento-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--amber-light);
  color: var(--amber-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.bento-card h3 {
  font-size: 1.25rem;
  font-weight: 750;
  margin-bottom: 12px;
}

.bento-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.68;
}

/* 流媒体图卡 & AI 支持图卡 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.feature-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-panel:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-focus);
  box-shadow: var(--shadow-lg);
}

.panel-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.panel-tag.media-tag {
  background: var(--sky-light);
  color: var(--sky-primary);
}

.panel-tag.ai-tag {
  background: var(--amber-light);
  color: var(--amber-primary);
}

.feature-panel h3 {
  font-size: 1.42rem;
  font-weight: 750;
  margin-bottom: 12px;
}

.feature-panel p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.65;
  margin-bottom: 24px;
}

.badge-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge-item svg {
  width: 17px;
  height: 17px;
  color: var(--amber-primary);
}

/* 套餐价格对比表 (参考真实市场价) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.price-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.price-card.featured {
  border: 2px solid var(--amber-primary);
  box-shadow: 0 8px 30px var(--amber-glow);
  transform: scale(1.02);
}

.price-card.featured:hover {
  transform: scale(1.04);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--amber-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--amber-glow);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  line-height: 1;
  z-index: 2;
}

.popular-ribbon svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  fill: currentColor;
}

.plan-name {
  font-size: 1.32rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--amber-primary);
}

.price-amount {
  font-size: 2.7rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-primary);
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 13px;
}

.plan-features li svg {
  width: 17px;
  height: 17px;
  color: var(--amber-primary);
  flex-shrink: 0;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-smooth);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-focus);
  box-shadow: var(--shadow-md);
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 12px;
  display: flex;
  gap: 2px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--amber-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.92rem;
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.9rem;
}

.reviewer-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 常见问题解答 (FAQ) */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-color-focus);
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  background: none;
  border: none;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.02rem;
  font-weight: 650;
}

.faq-icon {
  width: 19px;
  height: 19px;
  transition: transform var(--transition-smooth);
  color: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--amber-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
  padding: 0 22px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 22px 20px;
}

/* 页脚 (规范：仅保留四个标题，在新页面打开展示) */
.footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 44px 0 32px;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 600;
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--amber-primary);
  background: var(--bg-tertiary);
}

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.84rem;
  border-top: 1px solid var(--border-color);
  padding-top: 22px;
}

/* 独立内容页通用样式 */
.page-container {
  max-width: 920px;
  margin: 46px auto 76px;
  padding: 0 24px;
}

.page-header {
  margin-bottom: 32px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 2.3rem;
  font-weight: 850;
  margin-bottom: 10px;
}

.page-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px;
  box-shadow: var(--shadow-sm);
}

.content-box h2 {
  font-size: 1.4rem;
  font-weight: 750;
  margin: 30px 0 14px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-box h2:first-of-type {
  margin-top: 0;
}

.content-box p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-box ul {
  padding-left: 22px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.content-box li {
  margin-bottom: 8px;
}

.alert-notice {
  background: var(--amber-light);
  border-left: 4px solid var(--amber-primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  color: var(--text-primary);
  font-size: 0.94rem;
}

[data-theme="dark"] .alert-notice {
  background: rgba(245, 158, 11, 0.15);
}

/* 推荐资讯卡片列表 */
.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 24px;
}

.news-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-fast);
}

.news-card:hover {
  border-color: var(--amber-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.news-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--amber-light);
  color: var(--amber-primary);
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 700;
  margin-bottom: 10px;
}

[data-theme="dark"] .news-tag {
  background: rgba(245, 158, 11, 0.16);
}

.news-card h3 {
  font-size: 1.2rem;
  font-weight: 750;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.news-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 14px;
}

.news-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 22px;
}

.sitemap-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  background: var(--bg-tertiary);
}

.sitemap-card h3 {
  font-size: 1.12rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.sitemap-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-card li {
  margin-bottom: 9px;
}

.sitemap-card a {
  color: var(--amber-primary);
  text-decoration: none;
  font-weight: 550;
}

.sitemap-card a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   响应式媒体查询 (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.7rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .price-card.featured {
    transform: none;
  }
  .price-card.featured:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 64px;
  }
  .nav-menu {
    display: none;
  }
  .lang-switcher-pill {
    display: none;
  }
  .hero-section {
    padding: 50px 0 35px;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.22;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .hero-intro {
    font-size: 0.95rem;
    margin-bottom: 26px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .hero-metric-row {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 16px;
  }
  .metric-val {
    font-size: 1.8rem;
  }
  .route-hubs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .route-hub-btn:last-child {
    grid-column: span 2;
  }
  .bento-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  .content-box {
    padding: 24px 18px;
  }
  .footer-nav {
    gap: 14px;
  }
}
/* ==========================================================================
   文章详情页 (SEO In-Depth Article Template) 专属扩展样式
   ========================================================================== */

.article-container {
  max-width: 900px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.article-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-category-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--amber-light);
  color: var(--amber-primary);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 16px;
}

[data-theme="dark"] .article-category-tag {
  background: rgba(245, 158, 11, 0.16);
}

.article-title {
  font-size: 2.25rem;
  font-weight: 850;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录 (Table of Contents - TOC) */
.article-toc {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--amber-primary);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 28px 0 36px;
}

.article-toc-title {
  font-size: 1.1rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.article-toc-list li {
  margin-bottom: 10px;
}

.article-toc-list a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 550;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list a:hover {
  color: var(--amber-primary);
  text-decoration: underline;
}

.article-toc-num {
  color: var(--amber-primary);
  font-weight: 700;
  font-size: 0.85rem;
}

/* 文章正文排版 */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 750;
  color: var(--text-primary);
  margin: 28px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 26px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body blockquote {
  border-left: 4px solid var(--amber-primary);
  background: var(--amber-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-primary);
  font-size: 0.98rem;
}

[data-theme="dark"] .article-body blockquote {
  background: rgba(245, 158, 11, 0.14);
}

.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.article-table th {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover {
  background: rgba(217, 119, 6, 0.04);
}

/* 文章内置 CTA 卡片 */
.article-cta-box {
  background: var(--bg-card);
  border: 2px solid var(--amber-primary);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 44px 0;
  box-shadow: 0 8px 24px var(--amber-glow);
}

.article-cta-box h3 {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.article-cta-box p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  max-width: 600px;
  margin: 0 auto 22px;
}

/* 文章 FAQ 板块 */
.article-faq-section {
  margin: 50px 0;
}

.article-faq-section h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 22px;
  color: var(--text-primary);
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.faq-card h4 {
  font-size: 1.08rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-card h4::before {
  content: "Q:";
  color: var(--amber-primary);
  font-weight: 800;
}

.faq-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 相关阅读 (Related Reading) */
.article-related-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 2px dashed var(--border-color);
}

.article-related-title {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  text-decoration: none;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  border-color: var(--amber-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.related-tag {
  font-size: 0.75rem;
  color: var(--amber-primary);
  font-weight: 700;
  margin-bottom: 8px;
  display: block;
}

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.related-arrow {
  font-size: 0.85rem;
  color: var(--sky-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .article-title {
    font-size: 1.8rem;
  }
  .article-toc {
    padding: 18px 20px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}