/* ==========================================================================
   TAG 机场 (tagss.baby) - 极致光学物理与彩棱玻璃拟态 (Refractive Glass & Prism Fiber)
   奢华黑曜石/水晶底座 | 真实焦散光芒 | 色散彩虹光束 | 纯原生 CSS 架构
   ========================================================================== */

/* -------------------- 颜色与光学变量定义 -------------------- */
:root {
  /* 默认白天模式：高透射光学晶体与微彩虹色散 */
  --bg-primary: #f6f8fc;
  --bg-surface: rgba(255, 255, 255, 0.78);
  --bg-surface-elevated: rgba(255, 255, 255, 0.92);
  --bg-surface-translucent: rgba(255, 255, 255, 0.65);
  --border-color: rgba(226, 232, 240, 0.85);
  --border-subtle: rgba(226, 232, 240, 0.5);
  --border-glass: rgba(255, 255, 255, 0.8);
  --border-focus: #2563eb;

  --text-primary: #0a0f1d;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --accent-primary: #2563eb;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #ec4899 100%);
  --accent-spectrum: linear-gradient(90deg, #ff3b30, #ff9500, #ffd60a, #34c759, #007aff, #5856d6, #af52de);
  --accent-subtle: rgba(37, 99, 235, 0.08);

  --badge-bg: rgba(37, 99, 235, 0.08);
  --badge-text: #1d4ed8;
  --badge-border: rgba(37, 99, 235, 0.2);

  --crystal-glow: radial-gradient(circle, rgba(37, 99, 235, 0.18) 0%, rgba(124, 58, 237, 0.12) 35%, rgba(236, 72, 153, 0.05) 70%, transparent 100%);
  --prism-ray-opacity: 0.55;

  --success: #059669;
  --success-bg: rgba(5, 150, 105, 0.1);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12), 0 8px 12px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(15, 23, 42, 0.18);
  --shadow-prism: 0 0 30px rgba(99, 102, 241, 0.25);

  --nav-backdrop: rgba(246, 248, 252, 0.82);
  --theme-btn-bg: rgba(255, 255, 255, 0.85);
  --theme-btn-border: rgba(203, 213, 225, 0.8);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-theme: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}

/* 黑夜模式：Deep Obsidian (#08080C) 豪华黑曜石与高保真光学焦散 */
[data-theme="dark"] {
  --bg-primary: #08080c;
  --bg-surface: rgba(16, 18, 27, 0.72);
  --bg-surface-elevated: rgba(22, 26, 40, 0.88);
  --bg-surface-translucent: rgba(14, 16, 24, 0.65);
  --border-color: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-glass: rgba(255, 255, 255, 0.18);
  --border-focus: #60a5fa;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #08080c;

  --accent-primary: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #60a5fa 0%, #a855f7 50%, #ec4899 100%);
  --accent-spectrum: linear-gradient(90deg, #ff3b30, #ff9500, #ffd60a, #34c759, #007aff, #5856d6, #af52de);
  --accent-subtle: rgba(59, 130, 246, 0.15);

  --badge-bg: rgba(59, 130, 246, 0.16);
  --badge-text: #93c5fd;
  --badge-border: rgba(59, 130, 246, 0.32);

  --crystal-glow: radial-gradient(circle, rgba(59, 130, 246, 0.25) 0%, rgba(168, 85, 247, 0.18) 40%, rgba(236, 72, 153, 0.08) 75%, transparent 100%);
  --prism-ray-opacity: 0.85;

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.15);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.65);
  --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.75);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.85);
  --shadow-prism: 0 0 35px rgba(96, 165, 250, 0.4);

  --nav-backdrop: rgba(8, 8, 12, 0.82);
  --theme-btn-bg: rgba(22, 26, 40, 0.75);
  --theme-btn-border: rgba(255, 255, 255, 0.15);
}

/* -------------------- 基础重置与全局布局 -------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: var(--transition-theme);
  overflow-x: hidden;
  position: relative;
}

/* 锚点滚动留出导航栏高度，避免遮挡标题 */
[id] {
  scroll-margin-top: 90px;
}

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

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* -------------------- 导航栏 Header -------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--nav-backdrop);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  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: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shine-prism 3.5s infinite;
}

@keyframes shine-prism {
  0% { left: -100%; }
  30%, 100% { left: 150%; }
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-primary);
  background-color: var(--accent-subtle);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--accent-spectrum);
  border-radius: 2px;
}

/* 推荐资讯高亮小徽章 */
.nav-link-badge {
  font-size: 0.68rem;
  background: var(--accent-spectrum);
  color: #ffffff;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  margin-left: 4px;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: inline-block;
}

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

/* 精致半透明光学质感昼夜切换按钮 */
.theme-toggle-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--theme-btn-bg);
  border: 1px solid var(--theme-btn-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.theme-icon-sun,
.theme-icon-moon {
  width: 21px;
  height: 21px;
  position: absolute;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.35s ease, color 0.3s ease;
  pointer-events: none;
}

/* 默认状态与白天模式 (严格隐藏月亮，仅展示优雅金光太阳) */
.theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  visibility: visible;
  color: #ea580c;
}

.theme-icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.3);
  visibility: hidden;
  color: #60a5fa;
}

/* 悬停微动效 */
.theme-toggle-btn:hover .theme-icon-sun {
  transform: rotate(30deg) scale(1.05);
  color: #f59e0b;
}

/* 黑夜模式 (严格隐藏太阳，仅展示清透月牙) */
[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.3);
  visibility: hidden;
}

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

[data-theme="dark"] .theme-toggle-btn:hover .theme-icon-moon {
  transform: rotate(-15deg) scale(1.05);
  color: #93c5fd;
}

/* 导航 CTA 按钮 */
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.5);
}

.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* -------------------- 通用按钮系统 -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 13px 30px;
  font-size: 1rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

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

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.08rem;
  border-radius: var(--radius-lg);
}

/* -------------------- 标签系统 -------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  backdrop-filter: blur(10px);
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
  70% { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

/* -------------------- 主视觉区 Hero Section -------------------- */
.hero-section {
  position: relative;
  padding: 90px 0 80px;
  overflow: hidden;
  perspective: 1200px;
}

/* 焦散光学渲染 Canvas 画布 (背景层) */
#caustics-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: var(--prism-ray-opacity);
}

.hero-glow-bg {
  position: absolute;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background: var(--crystal-glow);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-badge-wrap {
  margin-bottom: 24px;
}

/* 3D 浮动折射水晶 (Refractive Prism Crystal Block) */
.prism-crystal-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 30px;
  perspective: 1000px;
}

.prism-crystal-block {
  width: 130px;
  height: 130px;
  position: relative;
  transform-style: preserve-3d;
  animation: float-crystal 6s ease-in-out infinite;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes float-crystal {
  0%, 100% { transform: translateY(0px) rotateX(12deg) rotateY(15deg); }
  50% { transform: translateY(-14px) rotateX(-8deg) rotateY(-18deg); }
}

.crystal-facet {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0.05) 100%);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px) saturate(200%);
  box-shadow: inset 0 0 25px rgba(255, 255, 255, 0.35), var(--shadow-prism);
  display: flex;
  align-items: center;
  justify-content: center;
}

.crystal-brand-etching {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  background: var(--accent-spectrum);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.4));
  user-select: none;
}

.crystal-dispersion-beam {
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 220px;
  height: 4px;
  background: var(--accent-spectrum);
  filter: blur(4px);
  border-radius: var(--radius-full);
  opacity: 0.8;
}

/* 主标题：严格要求包含‘当前品牌名’ */
.hero-title {
  font-size: clamp(2.3rem, 5.2vw, 4rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-spectrum {
  background: var(--accent-spectrum);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 主视觉区详细简介 */
.hero-intro {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 780px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-guarantees {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.guarantee-item svg {
  color: var(--success);
  width: 18px;
  height: 18px;
}

/* 实时专线监控看板 (磨砂色散玻璃拟态) */
.hero-dashboard {
  margin-top: 60px;
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow: var(--shadow-xl);
  padding: 28px;
  position: relative;
  transition: var(--transition-theme);
  overflow: hidden;
}

.hero-dashboard::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-spectrum);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.dashboard-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
}

.dashboard-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--success);
  font-weight: 600;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--bg-surface-elevated);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  text-align: left;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

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

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.stat-unit {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
}

/* -------------------- 模块通用标题 -------------------- */
.section-wrap {
  padding: 100px 0;
  position: relative;
}

.section-wrap.alt-bg {
  background-color: var(--bg-surface-elevated);
  transition: var(--transition-theme);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* -------------------- 核心优势 (3个图文卡片) -------------------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.advantage-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 38px 32px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-glass);
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.advantage-icon-box {
  width: 62px;
  height: 62px;
  border-radius: var(--radius-md);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid var(--badge-border);
}

.advantage-icon-box svg {
  width: 30px;
  height: 30px;
}

.advantage-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.advantage-card p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-bullets {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-bullet {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.feature-bullet svg {
  width: 17px;
  height: 17px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

/* -------------------- 流媒体图卡 & AI 支持图卡 -------------------- */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 42px 38px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.showcase-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.showcase-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-spectrum);
}

.showcase-header {
  margin-bottom: 28px;
}

.showcase-icon-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  margin-bottom: 16px;
}

.showcase-header h3 {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.showcase-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
}

.service-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.service-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.service-pill:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}

.service-pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
}

.showcase-features {
  border-top: 1px solid var(--border-color);
  padding-top: 22px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.showcase-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.showcase-item svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}

/* -------------------- 套餐价格对比表 (参考网上真实价格) -------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
  position: relative;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px 26px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  cursor: pointer;
}

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

/* 光束吸附高亮动画 (Light Beam Snapping) */
.pricing-card.beam-focused {
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 35px rgba(99, 102, 241, 0.45), var(--shadow-xl);
  transform: translateY(-8px) scale(1.02);
}

.pricing-card.popular {
  border: 2px solid var(--accent-primary);
  box-shadow: var(--shadow-prism);
  transform: scale(1.03);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-6px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 42px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.plan-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.plan-amount {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.plan-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}

.plan-feature-item.muted {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.6;
}

.plan-feature-item.muted svg {
  color: var(--text-muted);
}

/* 光束吸附闪烁指示 */
.optical-flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.8) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  border-radius: var(--radius-xl);
  animation: flash-burst 0.5s ease-out;
}

@keyframes flash-burst {
  0% { opacity: 0.9; transform: scale(0.9); }
  100% { opacity: 0; transform: scale(1.1); }
}

/* -------------------- 用户评价 -------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.testimonial-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.testimonial-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.testimonial-content {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  border: 1px solid var(--badge-border);
}

.author-info h4 {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* -------------------- 常见问题解答 FAQ -------------------- */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  background: none;
  cursor: pointer;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  padding: 0 26px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}

.faq-answer-inner {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
}

/* -------------------- 底部行动号召 Banner -------------------- */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner-box {
  background: var(--accent-gradient);
  border-radius: var(--radius-xl);
  padding: 68px 48px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px -10px rgba(37, 99, 235, 0.45);
}

.cta-banner-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-spectrum);
}

.cta-banner-box h2 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
}

.cta-banner-box p {
  font-size: 1.15rem;
  opacity: 0.92;
  max-width: 640px;
  margin: 0 auto 36px;
}

.cta-banner-btn {
  background: #ffffff !important;
  color: #08080c !important;
  font-weight: 700;
  padding: 16px 42px;
  font-size: 1.12rem;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.25);
}

.cta-banner-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
}

/* -------------------- 页脚 Footer (严格遵循规范：只保留这四个标题) -------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 40px;
  transition: var(--transition-theme);
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--accent-primary);
  background-color: var(--accent-subtle);
}

.footer-meta {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.8;
}

.footer-meta a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* -------------------- 独立详情页面样式 (关于/条款/隐私/资讯/地模) -------------------- */
.page-container {
  max-width: 900px;
  margin: 48px auto 96px;
  padding: 0 24px;
}

.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.page-header-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.page-header-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.prose-section {
  margin-bottom: 42px;
}

.prose-section h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.prose-section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--text-primary);
}

.prose-section p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.prose-list {
  margin-left: 20px;
  margin-bottom: 22px;
}

.prose-list li {
  list-style-type: disc;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 10px;
}

.highlight-box {
  background: var(--bg-surface-elevated);
  border-left: 4px solid var(--accent-primary);
  padding: 22px 26px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.highlight-box.danger {
  border-left-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

.highlight-box.success {
  border-left-color: var(--success);
  background: var(--success-bg);
}

.highlight-box p {
  margin-bottom: 0;
}

/* 资讯卡片网格 (推荐资讯专用) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 32px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.article-meta-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-snippet {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 网站地图列表卡片 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.sitemap-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 14px;
}

.sitemap-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sitemap-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-links a:hover {
  color: var(--accent-primary);
  transform: translateX(4px);
}

/* -------------------- 响应式适配 @media -------------------- */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-card.popular:hover {
    transform: translateY(-6px);
  }

  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    box-shadow: var(--shadow-xl);
    display: none;
  }

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

  .mobile-toggle {
    display: flex;
  }

  .btn-nav-cta {
    display: none;
  }

  .advantages-grid,
  .media-ai-grid,
  .testimonials-grid,
  .pricing-grid,
  .articles-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }

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

  .showcase-features {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .cta-banner-box {
    padding: 44px 24px;
  }
}

@media (max-width: 480px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .hero-guarantees {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   深度 SEO 文章专栏与排版样式 (Article Layout & Typography)
   ========================================================================== */
.article-detail-container {
  max-width: 920px;
  margin: 40px auto 90px;
  padding: 0 24px;
}

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

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

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

.breadcrumb-separator {
  color: var(--border-color);
}

.article-header-box {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.article-meta-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.article-category-tag {
  background: var(--accent-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--badge-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}

.article-meta-info {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 14px;
}

.article-main-title {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.article-lead-summary {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  background: var(--bg-surface-elevated);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

/* 目录盒子 (Table of Contents) */
.toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 30px;
  margin: 36px 0;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 8px;
}

.toc-item a {
  color: var(--text-secondary);
  font-size: 0.96rem;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

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

.toc-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
}

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

.article-body-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 44px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-body-content h2::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 22px;
  background: var(--accent-spectrum);
  border-radius: 4px;
}

.article-body-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 14px;
}

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

.article-body-content strong {
  color: var(--text-primary);
}

.article-body-content ul,
.article-body-content ol {
  margin: 16px 0 24px 24px;
}

.article-body-content li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-body-content ul li {
  list-style: disc;
}

.article-body-content ol li {
  list-style: decimal;
}

/* 文章中的比较表格 */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.article-data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

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

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

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

.article-data-table tr:hover td {
  background: var(--accent-subtle);
}

/* 文章中的内嵌提示框 */
.article-callout {
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin: 28px 0;
  background: var(--bg-surface-elevated);
  border-left: 4px solid var(--accent-primary);
}

.article-callout.tip {
  border-left-color: var(--success);
  background: var(--success-bg);
}

.article-callout.warning {
  border-left-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}

.article-callout p:last-child {
  margin-bottom: 0;
}

/* 文章中的内链高亮 */
.internal-link {
  color: var(--accent-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

/* 文章独立 FAQ 模块 */
.article-faq-container {
  margin: 48px 0;
  padding: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.article-faq-header {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-faq-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

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

.article-faq-item p {
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 24px;
}

/* 相关阅读模块 (Related Reading) */
.related-posts-container {
  margin: 56px 0 36px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.related-posts-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.related-post-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.related-post-card h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.45;
}

.related-post-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-post-card .read-more {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
  
  .article-detail-container {
    padding: 0 16px;
  }
  
  .toc-box {
    padding: 20px 18px;
  }
}