/* ===================================================================
   夜煞云 (Night Fury Cloud) - 官方轻量原生样式表 (v2.0 宇宙星云与波浪地平线版)
   UI 视觉规范：Cosmic Violet-Nebula & Wavy-Horizon
   色调：深邃皇家靛青 (#1e1b4b) -> 瑰丽紫红星云 (#86198f) -> 纯白波浪切边
   高质感毛玻璃 / 3D星际飞船与悬浮行星球 / 昼夜自适应 / 毫秒级极速响应
   =================================================================== */

/* --- 1. CSS 变量与主题定义 --- */
:root {
  /* 宇宙星云核心专属调色板 */
  --cosmos-indigo: #1e1b4b;
  --cosmos-violet: #86198f;
  --cosmos-purple: #581c87;
  --cosmos-magenta: #c026d3;
  --cosmos-glow: #e879f9;
  --cosmos-cyan: #38bdf8;
  --cosmos-pink: #f472b6;
  --cosmos-gradient: linear-gradient(135deg, #1e1b4b 0%, #3b0764 45%, #86198f 100%);
  --cosmos-card-bg: rgba(23, 15, 48, 0.75);

  /* 白天模式 (默认) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-badge: #eff6ff;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --border-color: rgba(226, 232, 240, 0.95);
  --border-subtle: rgba(203, 213, 225, 0.6);
  --border-accent: rgba(134, 25, 143, 0.3);

  --primary: #7c3aed;
  --primary-hover: #6d28d9;
  --primary-light: #ede9fe;
  --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #c026d3 100%);
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-gradient: linear-gradient(135deg, #9333ea 0%, #db2777 100%);

  --wave-fill: #f8fafc;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 32px -8px rgba(30, 27, 75, 0.12), 0 4px 10px -4px rgba(30, 27, 75, 0.06);
  --shadow-magenta: 0 0 25px rgba(232, 121, 249, 0.4);

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

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1220px;
}

/* 黑夜模式 */
[data-theme="dark"] {
  --bg-primary: #070913;
  --bg-secondary: #0d1124;
  --bg-card: rgba(15, 20, 39, 0.78);
  --bg-card-hover: rgba(24, 30, 56, 0.9);
  --bg-glass: rgba(10, 14, 28, 0.86);
  --bg-badge: rgba(124, 58, 237, 0.18);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #070913;

  --border-color: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-accent: rgba(216, 70, 239, 0.35);

  --primary: #a855f7;
  --primary-hover: #c084fc;
  --primary-light: rgba(168, 85, 247, 0.2);
  --primary-gradient: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
  --accent-cyan: #38bdf8;
  --accent-emerald: #34d399;
  --accent-gradient: linear-gradient(135deg, #c084fc 0%, #f472b6 100%);

  --wave-fill: #070913;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 18px 36px rgba(0, 0, 0, 0.7);
  --shadow-magenta: 0 0 35px rgba(232, 121, 249, 0.3);
}

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

html {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth; /* 锚点跳转平滑滚动 */
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

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

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

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

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* --- 3. 头部导航 (Header / Navbar) --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 110;
  background: rgba(30, 27, 75, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-smooth);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-icon-wrapper {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(168, 85, 247, 0.45);
  color: #fff;
  flex-shrink: 0;
}

.brand-name-text {
  color: #ffffff;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tag-mini {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(232, 121, 249, 0.2);
  color: #e879f9;
  border: 1px solid rgba(232, 121, 249, 0.35);
  letter-spacing: 0.5px;
}

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

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  padding: 6px 4px;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: #ffffff;
  text-shadow: 0 0 12px rgba(232, 121, 249, 0.6);
}

.nav-link.active-link::after,
.nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #e879f9, #38bdf8);
  border-radius: 2px;
}

/* 推荐资讯特殊微高亮标记 */
.nav-badge-hot {
  font-size: 10px;
  font-weight: 700;
  background: #f43f5e;
  color: #ffffff;
  padding: 1px 5px;
  border-radius: var(--radius-full);
  margin-left: 3px;
  vertical-align: super;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 昼夜模式切换按钮（精致透明质感，毛玻璃） */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.88);
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  color: #ffffff;
  border-color: rgba(232, 121, 249, 0.5);
  box-shadow: 0 0 16px rgba(232, 121, 249, 0.4);
  transform: translateY(-1px);
}

.theme-icon {
  width: 19px;
  height: 19px;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

[data-theme="dark"] .theme-icon-sun {
  display: block;
  color: #fbbf24;
}

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

/* 白色/对比药丸按钮 (Stark White Pill Button) */
.btn-pill-white {
  background: #ffffff !important;
  color: #1e1b4b !important;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14.5px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
}

.btn-pill-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.4), 0 0 20px rgba(232, 121, 249, 0.4);
  filter: brightness(1.05);
}

.btn-pill-trans {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff !important;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-pill-trans:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(232, 121, 249, 0.5);
  transform: translateY(-1px);
}

/* 移动端汉堡按钮 */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

/* --- 4. Cosmic Violet-Nebula 主视觉区 (Hero Section) --- */
.hero-cosmic-wrapper {
  background: var(--cosmos-gradient);
  position: relative;
  overflow: hidden;
  padding: 80px 0 0;
  color: #ffffff;
}

/* 星云背景光晕纹理与星点 */
.hero-cosmic-wrapper::before {
  content: "";
  position: absolute;
  top: -150px;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(232, 121, 249, 0.22) 0%, rgba(134, 25, 143, 0.12) 50%, transparent 75%);
  border-radius: 50%;
  filter: blur(50px);
  pointer-events: none;
}

.hero-cosmic-wrapper::after {
  content: "";
  position: absolute;
  bottom: 80px;
  right: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, rgba(124, 58, 237, 0.15) 50%, transparent 80%);
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

/* 悬浮发光粉紫行星球 (Luminous lavender-pink planetary spheres) */
.floating-planet {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: floatSlow 8s ease-in-out infinite alternate;
}

.planet-1 {
  width: 90px;
  height: 90px;
  top: 60px;
  right: 18%;
  background: radial-gradient(circle at 30% 30%, #f472b6, #86198f 70%, #1e1b4b);
  box-shadow: 0 0 35px rgba(244, 114, 182, 0.5), inset -8px -8px 20px rgba(0, 0, 0, 0.6);
  opacity: 0.85;
}

.planet-2 {
  width: 46px;
  height: 46px;
  top: 240px;
  left: 6%;
  background: radial-gradient(circle at 35% 35%, #e879f9, #701a75 75%);
  box-shadow: 0 0 25px rgba(232, 121, 249, 0.6);
  animation-duration: 11s;
  animation-delay: -3s;
}

.planet-3 {
  width: 32px;
  height: 32px;
  bottom: 140px;
  left: 45%;
  background: radial-gradient(circle at 30% 30%, #38bdf8, #1e1b4b 80%);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
  animation-duration: 9s;
  animation-delay: -5s;
}

@keyframes floatSlow {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-16px) rotate(4deg); }
  100% { transform: translateY(12px) rotate(-3deg); }
}

.hero-asymmetric-grid {
  display: grid;
  grid-template-columns: 1.28fr 0.82fr;
  align-items: center;
  gap: 40px;
  padding-bottom: 60px;
  position: relative;
  z-index: 2;
}

/* 左侧标题与引导区 */
.hero-content-col {
  text-align: left;
}

.hero-tag-glow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(232, 121, 249, 0.4);
  color: #fce7f3;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 10px #34d399;
}

.hero-brand-headline {
  font-size: clamp(22px, 3.5vw, 46px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: #ffffff;
  white-space: nowrap;
}

.hero-brand-headline .brand-highlight {
  background: linear-gradient(135deg, #ffffff 10%, #f472b6 60%, #e879f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtext-intro {
  font-size: clamp(16px, 1.8vw, 18.5px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 34px;
  max-width: 600px;
}

.hero-cta-btns {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-speed-badges {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  flex-wrap: wrap;
}

.speed-badge-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.speed-badge-item svg {
  color: #34d399;
}

/* 右侧复合卡片：3D 星际飞船 + 4K 流媒体展示卡 (Angled Spacecraft & 4K Showcase) */
.hero-visual-col {
  position: relative;
  display: flex;
  justify-content: center;
}

/* 4K 悬浮流媒体展示卡 (Hovering with crisp magenta rim-glow) */
.media-showcase-card {
  width: 100%;
  max-width: 440px;
  background: var(--cosmos-card-bg);
  border: 1px solid rgba(232, 121, 249, 0.35);
  border-radius: var(--radius-xl);
  padding: 26px 24px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), var(--shadow-magenta);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  transition: all var(--transition-normal);
  z-index: 3;
}

.media-showcase-card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: #e879f9;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(232, 121, 249, 0.6);
}

.showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.showcase-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stream-pulse-ring {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #e879f9;
  box-shadow: 0 0 12px #e879f9;
}

.showcase-badge-telemetry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(52, 211, 153, 0.18);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.stream-screen-preview {
  background: rgba(10, 8, 26, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 18px;
  position: relative;
}

.preview-channels {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.channel-icon-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: #ffffff;
}

.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  text-align: center;
}

.telemetry-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 8px 6px;
}

.telemetry-num {
  font-size: 16px;
  font-weight: 800;
  color: #ffffff;
}

.telemetry-lbl {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
}

.telemetry-highlight {
  color: #e879f9;
}

.showcase-footer-action {
  margin-top: 16px;
}

/* 3D 风格星际飞船矢量图 (Angled 3D Spacecraft Ascending) */
.spacecraft-illustration {
  position: absolute;
  top: -45px;
  right: -25px;
  width: 140px;
  height: 140px;
  pointer-events: none;
  z-index: 4;
  animation: rocketHover 5s ease-in-out infinite alternate;
}

@keyframes rocketHover {
  0% { transform: translateY(0px) rotate(-8deg); }
  100% { transform: translateY(-14px) rotate(-14deg); }
}

/* 波浪地平线底部切割线 (Smooth Cloud-White Wavy Horizon Bottom Cut) */
.wavy-horizon-divider {
  width: 100%;
  line-height: 0;
  direction: ltr;
  position: relative;
  z-index: 5;
  margin-top: -1px;
}

.wavy-horizon-divider svg {
  width: 100%;
  height: 68px;
  display: block;
}

.wave-fill-path {
  fill: var(--wave-fill);
  transition: fill var(--transition-smooth);
}

/* 波浪下方居中标题 ("为你 量身定制 的服务") */
.section-post-wave {
  padding: 30px 0 60px;
  text-align: center;
}

.customized-headline-centered {
  font-size: clamp(26px, 3.8vw, 36px);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.6px;
  margin-bottom: 12px;
}

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

.customized-sub-centered {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* --- 5. 核心板块与卡片通用样式 --- */
.section {
  padding: 80px 0;
  position: relative;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

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

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

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.08);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

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

.feature-checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px dashed var(--border-color);
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-secondary);
}

.checklist-item svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* --- 6. 流媒体图卡 & AI 支持图卡 (Showcase Cards) --- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 38px 32px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  width: fit-content;
}

.badge-media {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-ai {
  background: rgba(168, 85, 247, 0.1);
  color: #a855f7;
  border: 1px solid rgba(168, 85, 247, 0.25);
}

.showcase-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.showcase-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.pill-tags-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.tech-pill:hover {
  border-color: var(--primary);
  background: var(--bg-card);
  transform: translateY(-2px);
}

.tech-pill svg {
  width: 16px;
  height: 16px;
}

.showcase-status-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  border: 1px solid var(--border-subtle);
}

.status-label {
  font-size: 13.5px;
  color: var(--text-muted);
}

.status-spec {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* --- 7. 套餐价格与真实对比表 (Pricing) --- */
.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 52px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.22);
  transform: scale(1.03);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-5px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
  white-space: nowrap;
}

.plan-name {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 13.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* 按钮基础类 */
.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-full);
  transition: all var(--transition-normal);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(124, 58, 237, 0.45);
  filter: brightness(1.05);
}

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

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 16px;
  border-radius: var(--radius-full);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13.5px;
}

/* 参数对比表格 */
.comparison-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

.comparison-table-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, 
.comparison-table td {
  padding: 16px 20px;
  font-size: 14.5px;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  color: var(--text-primary);
  font-weight: 700;
  background: var(--bg-secondary);
}

.comparison-table th:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.comparison-table th:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

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

.comparison-table tr:hover td {
  background-color: var(--bg-secondary);
}

.check-yes {
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

/* --- 8. 用户评价 (Testimonials) --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

.review-content {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

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

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.reviewer-info h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.reviewer-info p {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* --- 9. 常见问题 (FAQ) --- */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

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

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text-primary);
  gap: 16px;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition-normal);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1), padding 0.35s ease;
  padding: 0 24px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 24px;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.35s ease;
}

/* --- 10. 页底行动呼吁 (Bottom CTA) --- */
.cta-banner {
  margin: 70px 0 30px;
  background: linear-gradient(135deg, #1e1b4b 0%, #4c1d95 50%, #86198f 100%);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(30, 27, 75, 0.3);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232, 121, 249, 0.25) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner-title {
  font-size: clamp(26px, 3.8vw, 38px);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-banner-desc {
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 16.5px;
  opacity: 0.92;
  line-height: 1.6;
}

/* --- 11. 页脚 (Footer 严格只保留四个标题) --- */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-card);
  padding: 50px 0 36px;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}

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

.footer-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

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

.footer-divider {
  width: 100%;
  max-width: 400px;
  height: 1px;
  background: var(--border-color);
}

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

.footer-copyright a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-copyright a:hover {
  color: var(--primary);
}

/* --- 12. 独立子页面内容通用样式 --- */
.page-hero {
  padding: 60px 0 36px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.page-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.page-content-wrapper {
  max-width: 860px;
  margin: 50px auto 90px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}

.content-block {
  margin-bottom: 38px;
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-block p, 
.content-block li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.content-block ul {
  padding-left: 20px;
  list-style-type: disc;
  margin: 12px 0;
}

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

.highlight-box {
  background: var(--bg-badge);
  border-left: 4px solid var(--primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 18px 0;
  color: var(--text-primary);
  font-size: 14.5px;
  line-height: 1.7;
}

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

/* 资讯卡片网格样式 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.news-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.news-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 12px;
  width: fit-content;
}

.news-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.news-meta {
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px dashed var(--border-subtle);
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.sitemap-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.sitemap-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px dashed var(--border-color);
  transition: color var(--transition-fast);
}

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

/* --- 13. 响应式媒体查询 (@media) --- */
@media (max-width: 1024px) {
  .hero-asymmetric-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content-col {
    text-align: center;
  }

  .hero-subtext-intro {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-btns, .hero-speed-badges {
    justify-content: center;
  }

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

  .pricing-cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(30, 27, 75, 0.98);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.5);
    gap: 18px;
  }

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

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-cosmic-wrapper {
    padding: 50px 0 0;
  }

  .hero-brand-headline {
    font-size: clamp(16px, 4.6vw, 30px);
    white-space: nowrap;
  }

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

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

  .pricing-cards-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.popular {
    transform: none;
  }

  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }

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

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

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

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

  .hero-cta-btns .btn,
  .hero-cta-btns .btn-pill-white {
    width: 100%;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .page-content-wrapper {
    padding: 24px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }
}

/* --- 14. SEO 深度长篇文章专用排版系统 (Article Page Styling) --- */
.article-page-header {
  background: var(--cosmos-gradient);
  padding: 60px 0 50px;
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.article-page-header::before {
  content: "";
  position: absolute;
  top: -80px;
  left: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232, 121, 249, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 20px;
}

.article-breadcrumb a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.article-title-main {
  font-size: clamp(25px, 3.8vw, 38px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.6px;
  margin-bottom: 20px;
  color: #ffffff;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.85);
  flex-wrap: wrap;
}

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

.article-layout-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  margin: 50px auto 90px;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 96px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.toc-link {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.45;
  padding: 4px 0;
  transition: all var(--transition-fast);
}

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

.toc-sublink {
  padding-left: 16px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.toc-sublink:hover {
  color: var(--primary);
}

.sidebar-cta-box {
  margin-top: 24px;
  background: var(--primary-light);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: center;
}

.sidebar-cta-box h4 {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.sidebar-cta-box p {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-content-body {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 46px 42px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.article-lead {
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 36px;
}

.article-content-body h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
  scroll-margin-top: 96px;
}

.article-content-body h3 {
  font-size: 18.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 14px;
  scroll-margin-top: 96px;
}

.article-content-body p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.article-content-body ul, 
.article-content-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

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

.article-content-body a.inline-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content-body a.inline-link:hover {
  color: var(--primary-hover);
}

.prose-table-wrapper {
  overflow-x: auto;
  margin: 24px 0 30px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.prose-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.prose-table th, 
.prose-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border-color);
}

.prose-table th {
  background: var(--bg-secondary);
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
}

.prose-table tr:hover td {
  background: var(--bg-secondary);
}

.in-article-cta {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.95) 0%, rgba(134, 25, 143, 0.95) 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  margin: 36px 0;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.in-article-cta h3 {
  color: #ffffff !important;
  font-size: 21px;
  margin: 0 0 10px;
}

.in-article-cta p {
  color: rgba(255, 255, 255, 0.88) !important;
  font-size: 14.5px;
  max-width: 540px;
  margin: 0 auto 20px;
}

.article-faq-section {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 2px dashed var(--border-color);
}

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

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

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

.faq-card-a {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.related-reading-section {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.related-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.related-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .article-layout-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .article-sidebar {
    position: static;
  }

  .article-content-body {
    padding: 28px 20px;
  }

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