/* ==========================================================================
   龙猫云 (TotoroCloud) - 院线级 4K 流媒体极致加速样式表
   域名: totoro-cloud.sbs
   设计语言: Cinematic 4K Streaming Console / Theater Dark Canvas (#08080a)
   光效: Netflix 绯红 (#E50914) / Disney 皇家蓝 (#0063E5) / HBO 魅紫 (#8B5CF6)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 基础色彩变量与昼夜主题系统
   -------------------------------------------------------------------------- */
:root {
  /* 白天优雅明亮模式 (Light Luxury Studio Mode) */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-console: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;

  --text-main: #0a0f1d;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --border-hairline: rgba(15, 23, 42, 0.08);
  --border-focus: rgba(0, 99, 229, 0.4);
  --border-glow: rgba(0, 99, 229, 0.25);

  --primary: #0063e5;
  --primary-hover: #0051b8;
  --primary-light: rgba(0, 99, 229, 0.08);

  /* 院线流媒体特征色彩 */
  --c-netflix: #e50914;
  --c-disney: #0063e5;
  --c-hbo: #8b5cf6;
  --c-youtube: #ff0000;
  --c-spotify: #1db954;
  --c-prime: #00a8e1;

  --grad-primary: linear-gradient(135deg, #0063e5 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-cinema: linear-gradient(135deg, #e50914 0%, #0063e5 50%, #8b5cf6 100%);
  --grad-badge: linear-gradient(135deg, rgba(0, 99, 229, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);

  /* 环境光晕 */
  --ambient-bloom: radial-gradient(circle at 50% -10%, rgba(0, 99, 229, 0.12) 0%, rgba(139, 92, 246, 0.08) 35%, transparent 70%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 14px 30px rgba(0, 0, 0, 0.1);
  --shadow-cinema: 0 16px 36px -10px rgba(0, 99, 229, 0.2);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --max-width: 1240px;

  --transition-fast: 0.18s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-theme: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

/* --------------------------------------------------------------------------
   夜间影院模式 (Theater Dark Canvas #08080a)
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --bg-body: #08080a;
  --bg-surface: #0e0f14;
  --bg-surface-alt: #13141c;
  --bg-console: #0c0d12;
  --bg-glass: rgba(8, 8, 10, 0.88);
  --bg-card: rgba(14, 15, 21, 0.78);
  --bg-card-hover: rgba(20, 22, 31, 0.9);

  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8e9bb0;
  --text-dim: #556277;

  /* 极致微发丝边框 (Ultra-thin hairline borders) */
  --border-hairline: rgba(255, 255, 255, 0.07);
  --border-focus: rgba(0, 99, 229, 0.6);
  --border-glow: rgba(0, 99, 229, 0.4);

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.15);

  --grad-primary: linear-gradient(135deg, #0063e5 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-cinema: linear-gradient(135deg, #e50914 0%, #0063e5 50%, #8b5cf6 100%);
  --grad-badge: linear-gradient(135deg, rgba(229, 9, 20, 0.15) 0%, rgba(0, 99, 229, 0.15) 50%, rgba(139, 92, 246, 0.15) 100%);

  /* 院线环境流光：Netflix绯红 + Disney皇家蓝 + HBO魅紫流动 */
  --ambient-bloom: 
    radial-gradient(ellipse 45% 35% at 20% 0%, rgba(229, 9, 20, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 55% 45% at 50% -10%, rgba(0, 99, 229, 0.22) 0%, transparent 70%),
    radial-gradient(ellipse 45% 35% at 85% 0%, rgba(139, 92, 246, 0.18) 0%, transparent 60%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 14px 34px rgba(0, 0, 0, 0.75);
  --shadow-cinema: 0 20px 45px rgba(0, 0, 0, 0.85), 0 0 40px rgba(0, 99, 229, 0.22);
}

/* --------------------------------------------------------------------------
   2. 基础重置与排版
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  transition: var(--transition-theme);
  position: relative;
  min-height: 100vh;
}

/* 顶部流光环境画布 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 750px;
  background: var(--ambient-bloom);
  pointer-events: none;
  z-index: 0;
  animation: ambientShift 12s ease-in-out infinite alternate;
}

@keyframes ambientShift {
  0% { transform: scale(1) translateY(0); opacity: 0.9; }
  50% { transform: scale(1.05) translateY(-10px); opacity: 1; }
  100% { transform: scale(1) translateY(0); opacity: 0.9; }
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   3. 顶部导航栏 (Navbar)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-hairline);
  transition: var(--transition-theme);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  user-select: none;
}

.site-brand-logo-img {
  height: 40px;
  width: auto;
  max-width: 165px;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand-logo:hover .site-brand-logo-img {
  transform: scale(1.04);
}

.brand-logo-light {
  display: block;
}
.brand-logo-dark {
  display: none;
}

[data-theme="dark"] .brand-logo-light {
  display: none;
}
[data-theme="dark"] .brand-logo-dark {
  display: block;
  filter: drop-shadow(0 0 12px rgba(0, 99, 229, 0.4));
}

.brand-title-text {
  font-weight: 900;
  letter-spacing: -0.01em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.brand-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--grad-cinema);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(0, 99, 229, 0.35);
  position: relative;
}

.brand-icon-box::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(255,255,255,0.4), transparent);
  pointer-events: none;
}

.brand-name {
  font-weight: 900;
  letter-spacing: -0.01em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-subtag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-left: -4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  padding: 6px 4px;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
  border-radius: 2px;
}

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

/* 推荐资讯高亮徽标 */
.nav-link-badge {
  font-size: 10px;
  font-weight: 700;
  color: #ffffff;
  background: var(--c-netflix);
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  margin-left: 4px;
  vertical-align: middle;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 昼夜模式切换按钮 - 半透明影院调光盘质感 */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  color: var(--primary);
  border-color: var(--border-focus);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--border-glow);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  position: absolute;
}

.icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}
[data-theme="dark"] .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   4. 按钮组件 (CTA Button)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(0, 99, 229, 0.35);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(0, 99, 229, 0.5);
  filter: brightness(1.08);
}

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

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-hairline);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--border-focus);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-large {
  padding: 14px 30px;
  font-size: 16px;
}

.btn-glow-cinema {
  background: linear-gradient(135deg, #e50914 0%, #0063e5 50%, #8b5cf6 100%);
  box-shadow: 0 6px 24px rgba(229, 9, 20, 0.35);
  animation: pulse-cinema 3s infinite;
}

@keyframes pulse-cinema {
  0%, 100% {
    box-shadow: 0 4px 20px rgba(229, 9, 20, 0.35);
  }
  50% {
    box-shadow: 0 8px 30px rgba(0, 99, 229, 0.55);
  }
}

/* --------------------------------------------------------------------------
   5. 主视觉区 (Hero Section - 院线调色台监视器概念)
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  background: var(--grad-badge);
  border: 1px solid var(--border-focus);
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 24px;
}

.rec-pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--c-netflix);
  box-shadow: 0 0 12px var(--c-netflix);
  position: relative;
  display: inline-block;
}

.rec-pulse-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1.5px solid var(--c-netflix);
  animation: rec-ripple 1.6s infinite cubic-bezier(0, 0.2, 0.8, 1);
}

@keyframes rec-ripple {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2.4); opacity: 0; }
}

.hero-title {
  font-size: clamp(32px, 5vw, 58px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin-bottom: 18px;
  color: var(--text-main);
}

.hero-title .brand-highlight {
  background: var(--grad-cinema);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 600;
  color: var(--text-secondary);
  max-width: 860px;
  margin: 0 auto 16px;
  line-height: 1.5;
}

/* 主视觉简介 (Synopsis) */
.hero-synopsis {
  font-size: 15.5px;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   6. 专业调色台与 4K 60FPS 实时码率波形监视器 (Bitrate Waveform Monitor)
   -------------------------------------------------------------------------- */
.cinema-monitor-console {
  background: var(--bg-console);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-cinema);
  position: relative;
  overflow: hidden;
  max-width: 960px;
  margin: 0 auto 40px;
  transition: all var(--transition-base);
  cursor: pointer;
}

.cinema-monitor-console::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-cinema);
}

.cinema-monitor-console:hover {
  border-color: var(--border-focus);
  box-shadow: 0 24px 60px rgba(0, 99, 229, 0.28);
}

.console-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-size: 12.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.console-status-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.console-rec {
  color: var(--c-netflix);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.console-spec {
  color: var(--text-dim);
}

.console-speed-readout {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 4K 码率波形画布容器 */
.waveform-container {
  height: 90px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.waveform-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* 动态波浪线 (4K 60FPS 流畅波动) */
.waveform-path-active {
  fill: none;
  stroke: url(#cinemaGradient);
  stroke-width: 2.8;
  stroke-linecap: round;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 0 10px rgba(0, 99, 229, 0.6));
}

/* 悬停锁定时：波形平滑变为绝对平直的无抖动直线，证明 0 缓冲 */
.cinema-monitor-console:hover .waveform-path-active {
  d: path("M 0,45 L 200,45 L 400,45 L 600,45 L 800,45 L 1000,45");
  stroke: #10b981;
  filter: drop-shadow(0 0 12px rgba(16, 185, 129, 0.8));
}

.waveform-hover-hint {
  position: absolute;
  bottom: 6px;
  right: 14px;
  font-size: 11.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--text-dim);
  background: var(--bg-surface);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-hairline);
  transition: all var(--transition-fast);
}

.cinema-monitor-console:hover .waveform-hover-hint {
  color: #10b981;
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  content: "专线锁定 · 零缓冲 · 零抖动 (ZERO BUFFERING)";
}

/* 控制台底部参数栏 */
.console-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 18px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 14px;
  text-align: left;
}

.console-metric-item {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metric-key {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.metric-val {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   7. 通用模块标题区
   -------------------------------------------------------------------------- */
.section {
  padding: 85px 0;
  position: relative;
}

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

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  background: var(--grad-badge);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-focus);
}

.section-title {
  font-size: clamp(26px, 3.8vw, 40px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-desc {
  font-size: 16.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   8. 核心优势模块 (3个宽荧幕图文卡片)
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-cinema);
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: var(--grad-badge);
  color: var(--primary);
  border: 1px solid var(--border-hairline);
  transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.08) rotate(3deg);
}

.feature-title {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-highlights {
  list-style: none;
  border-top: 1px dashed var(--border-hairline);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-highlights li {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-highlights li svg {
  color: #10b981;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   9. 流媒体图卡与电视氛围动态背光微交互 (TV-Ambient Backlight Bloom)
   -------------------------------------------------------------------------- */
.streaming-cinema-wrap {
  position: relative;
}

/* 氛围光晕投影层 */
.streaming-cinema-wrap::before {
  content: "";
  position: absolute;
  inset: -20px;
  background: transparent;
  pointer-events: none;
  z-index: 0;
  transition: all 0.5s ease;
  border-radius: var(--radius-lg);
}

.streaming-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  position: relative;
  z-index: 1;
}

/* 宽画幅影院流媒体卡片 */
.streaming-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 悬停时产生电视环境光泛光投影 */
.streaming-card.stream-netflix:hover {
  border-color: var(--c-netflix);
  box-shadow: 0 14px 40px -5px rgba(229, 9, 20, 0.45), 0 0 50px rgba(229, 9, 20, 0.2);
  transform: translateY(-5px);
}

.streaming-card.stream-disney:hover {
  border-color: var(--c-disney);
  box-shadow: 0 14px 40px -5px rgba(0, 99, 229, 0.45), 0 0 50px rgba(0, 99, 229, 0.2);
  transform: translateY(-5px);
}

.streaming-card.stream-hbo:hover {
  border-color: var(--c-hbo);
  box-shadow: 0 14px 40px -5px rgba(139, 92, 246, 0.45), 0 0 50px rgba(139, 92, 246, 0.2);
  transform: translateY(-5px);
}

.streaming-card.stream-youtube:hover {
  border-color: var(--c-youtube);
  box-shadow: 0 14px 40px -5px rgba(255, 0, 0, 0.4), 0 0 50px rgba(255, 0, 0, 0.2);
  transform: translateY(-5px);
}

.streaming-card.stream-spotify:hover {
  border-color: var(--c-spotify);
  box-shadow: 0 14px 40px -5px rgba(29, 185, 84, 0.4), 0 0 50px rgba(29, 185, 84, 0.2);
  transform: translateY(-5px);
}

.streaming-card.stream-prime:hover {
  border-color: var(--c-prime);
  box-shadow: 0 14px 40px -5px rgba(0, 168, 225, 0.4), 0 0 50px rgba(0, 168, 225, 0.2);
  transform: translateY(-5px);
}

.streaming-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.streaming-logo-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 15px;
  color: #ffffff;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-fast);
}

.streaming-card:hover .streaming-logo-badge {
  transform: scale(1.08);
}

.streaming-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
}

.streaming-badge {
  font-size: 11.5px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  margin-top: 3px;
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.streaming-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.streaming-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag-pill {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-alt);
  color: var(--text-secondary);
  font-weight: 500;
  border: 1px solid var(--border-hairline);
}

/* --------------------------------------------------------------------------
   10. AI 生态支持模块 (硬核算力与干净住宅IP，无俗套bot卡通)
   -------------------------------------------------------------------------- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.ai-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.ai-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-cinema);
}

.ai-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.ai-card-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ai-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border-hairline);
}

.ai-card-title {
  font-size: 18.5px;
  font-weight: 700;
  color: var(--text-main);
}

.ai-status-badge {
  font-size: 12px;
  font-weight: 600;
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.ai-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.ai-card-specs {
  background-color: var(--bg-surface-alt);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border-hairline);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* --------------------------------------------------------------------------
   11. 套餐价格对比模块 (参考网上真实套餐价格)
   -------------------------------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 48px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-cinema);
  transform: scale(1.02);
  background-color: var(--bg-surface);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-cinema);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 14px rgba(229, 9, 20, 0.4);
  white-space: nowrap;
}

.pricing-header {
  margin-bottom: 20px;
  text-align: center;
}

.pricing-plan-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-cost {
  margin: 18px 0;
  text-align: center;
}

.pricing-currency {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  vertical-align: top;
  margin-right: 2px;
}

.pricing-amount {
  font-size: 44px;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.03em;
  line-height: 1;
}

.pricing-cycle {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin: 20px 0 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}

.pricing-features li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: #10b981;
}

.pricing-cta {
  margin-top: auto;
}

.pricing-cta .btn {
  width: 100%;
}

/* 详细参数对比表 */
.pricing-matrix-wrap {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.pricing-matrix-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  text-align: center;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.pricing-table th, .pricing-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-hairline);
}

.pricing-table th {
  background-color: var(--bg-surface-alt);
  color: var(--text-main);
  font-weight: 700;
}

.pricing-table td {
  color: var(--text-secondary);
}

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

/* --------------------------------------------------------------------------
   12. 用户评价模块 (User Reviews)
   -------------------------------------------------------------------------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.review-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 14px;
  font-size: 15px;
}

.review-content {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 16px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 15px;
  flex-shrink: 0;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
}

.author-title {
  font-size: 12px;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   13. 常见问题解答模块 (FAQ Accordion)
   -------------------------------------------------------------------------- */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text-main);
  background: none;
  cursor: pointer;
}

.faq-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px dashed var(--border-hairline);
  padding-top: 16px;
}

/* 底部行动号召 */
.pre-footer-cta {
  background: var(--grad-cinema);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-cinema);
  margin-top: 40px;
}

.pre-footer-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.15), transparent 70%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: clamp(26px, 3.8vw, 42px);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-banner-desc {
  font-size: 17px;
  max-width: 680px;
  margin: 0 auto 30px;
  opacity: 0.95;
}

.pre-footer-cta .btn-light {
  background-color: #ffffff;
  color: #0b1120 !important;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.pre-footer-cta .btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  background-color: #f8fafc;
}

/* --------------------------------------------------------------------------
   14. 页脚规范 (严格只保留四个标题，在新页面打开)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-hairline);
  padding: 50px 0 35px;
  transition: var(--transition-theme);
  margin-top: 40px;
}

.footer-nav-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
}

.footer-links-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-nav-item {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav-item:hover {
  color: var(--primary);
  background-color: var(--bg-surface-alt);
}

.footer-bottom-info {
  text-align: center;
  border-top: 1px solid var(--border-hairline);
  padding-top: 24px;
}

.footer-copyright {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-meta-brand {
  font-weight: 700;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   15. 独立子页面通用样式 (包含推荐资讯列表)
   -------------------------------------------------------------------------- */
.subpage-container {
  max-width: 960px;
  margin: 40px auto 80px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-theme);
}

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

.subpage-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 10px;
}

.subpage-meta {
  font-size: 14px;
  color: var(--text-muted);
}

.subpage-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin: 32px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}

.subpage-content p {
  font-size: 15.5px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.subpage-content ul, .subpage-content ol {
  margin-bottom: 20px;
  padding-left: 22px;
}

.subpage-content li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.subpage-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
}

.subpage-back-link:hover {
  text-decoration: underline;
}

.subpage-callout {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-hairline);
  border-left: 4px solid #10b981;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 22px 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.subpage-callout.warning {
  border-left-color: var(--c-netflix);
  background-color: rgba(229, 9, 20, 0.05);
}

/* 推荐资讯卡片流 */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 24px;
}

.insight-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.insight-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-cinema);
  transform: translateY(-3px);
}

.insight-tag-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.insight-tag {
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--grad-badge);
  color: var(--primary);
}

.insight-date {
  font-size: 12px;
  color: var(--text-dim);
}

.insight-title {
  font-size: 18.5px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.insight-excerpt {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
}

/* --------------------------------------------------------------------------
   16. 移动端响应式适配 (@media)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .streaming-grid, .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .console-metrics-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-hairline);
    padding: 20px 24px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
  }
  .mobile-menu-toggle {
    display: flex;
  }
  .hero-section {
    padding: 45px 0 30px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .features-grid, .streaming-grid, .ai-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .footer-links-row {
    gap: 18px;
    flex-direction: column;
  }
  .subpage-container {
    padding: 24px 18px;
    margin: 20px 14px 40px;
  }
  .console-metrics-row {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-title {
    font-size: 26px;
  }
  .pre-footer-cta {
    padding: 40px 20px;
  }
  .btn {
    padding: 13px 20px;
    font-size: 15px;
  }
  .site-brand-logo-img {
    height: 32px;
    max-width: 130px;
  }
  .brand-title-text {
    font-size: 17px;
  }
  .console-metrics-row {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   17. SEO 长篇深度科普文章排版组件 (Articles / TOC / FAQ / Related Reading)
   -------------------------------------------------------------------------- */
.article-wrapper {
  max-width: 920px;
  margin: 36px auto 70px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-theme);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.article-header {
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 28px;
  margin-bottom: 32px;
}

.article-category-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--grad-badge);
  color: var(--primary);
  margin-bottom: 14px;
}

.article-main-title {
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13.5px;
  color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, monospace;
  flex-wrap: wrap;
}

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

.toc-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0;
  list-style: none;
}

.toc-item a {
  font-size: 14.5px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toc-item a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

/* 文章正文排版 */
.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin: 26px 0 12px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin: 14px 0 22px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

.article-body a:hover {
  filter: brightness(1.15);
}

.article-callout-box {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-hairline);
  border-left: 4px solid #10b981;
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 24px 0;
  font-size: 15px;
}

.article-callout-box.highlight {
  border-left-color: var(--c-netflix);
  background: rgba(229, 9, 20, 0.05);
}

/* 文章内嵌对比表格 */
.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0 32px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.article-table th {
  background-color: var(--bg-surface-alt);
  color: var(--text-main);
  padding: 12px 16px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-hairline);
}

.article-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-hairline);
  color: var(--text-secondary);
}

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

/* 常见问题 (FAQ in Articles) */
.article-faq-section {
  margin: 44px 0 36px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 32px;
}

.article-faq-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}

.faq-qa-card {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 14px;
}

.faq-qa-q {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-qa-q::before {
  content: "Q:";
  color: var(--primary);
  font-weight: 900;
}

.faq-qa-a {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* 相关阅读模块 (Related Articles) */
.related-posts-section {
  margin-top: 50px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 36px;
}

.related-posts-title {
  font-size: 21px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 22px;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.related-card {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

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

.related-card-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .article-wrapper {
    padding: 26px 18px;
    margin: 20px 14px 40px;
  }
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}