/* ===================================================================
   木瓜云 (muguacloud.shop) - Warp-Portal & Dimensional Fold UI
   高维时空折叠风格核心样式表 · 极简原生无第三方依赖
   =================================================================== */

:root {
  /* 基础维度色彩系统 - 默认白天模式 (Cosmic Light) */
  --bg-event-horizon: #f8fafc;
  --bg-space: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-surface-glass: rgba(255, 255, 255, 0.85);
  --bg-hud: rgba(255, 255, 255, 0.92);
  --bg-hud-hover: rgba(255, 255, 255, 0.98);

  --twilight-indigo: #4338ca;
  --twilight-indigo-glow: rgba(67, 56, 202, 0.18);
  --portal-rose: #f43f5e;
  --portal-rose-glow: rgba(244, 63, 94, 0.28);
  --warp-blue: #0284c7;
  --warp-blue-glow: rgba(2, 132, 199, 0.25);
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;

  --text-main: #090d16;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --border-glass: rgba(226, 232, 240, 0.9);
  --border-portal: rgba(244, 63, 94, 0.35);
  --border-indigo: rgba(67, 56, 202, 0.25);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px -4px rgba(15, 23, 42, 0.08);
  --shadow-portal: 0 16px 40px -8px rgba(244, 63, 94, 0.18), 0 0 30px rgba(67, 56, 202, 0.15);
  --shadow-glow: 0 0 30px rgba(2, 132, 199, 0.22);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-portal: 140px 140px 18px 18px;
  --radius-full: 9999px;

  --trans-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --trans-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --trans-portal: 0.65s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] {
  /* 深度时空黑洞夜间模式 (Boundless High-Dimensional Dark) */
  --bg-event-horizon: #040508;
  --bg-space: #070913;
  --bg-surface: #0a0e1c;
  --bg-surface-glass: rgba(10, 14, 28, 0.82);
  --bg-hud: rgba(13, 18, 38, 0.72);
  --bg-hud-hover: rgba(20, 28, 58, 0.85);

  --twilight-indigo: #312e81;
  --twilight-indigo-glow: rgba(49, 46, 129, 0.6);
  --portal-rose: #f43f5e;
  --portal-rose-glow: rgba(244, 63, 94, 0.45);
  --warp-blue: #38bdf8;
  --warp-blue-glow: rgba(56, 189, 248, 0.35);
  --accent-cyan: #22d3ee;
  --accent-emerald: #34d399;

  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #040508;

  --border-glass: rgba(255, 255, 255, 0.1);
  --border-portal: rgba(244, 63, 94, 0.45);
  --border-indigo: rgba(79, 70, 229, 0.35);

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 12px 28px -6px rgba(0, 0, 0, 0.8);
  --shadow-portal: 0 0 50px -5px rgba(244, 63, 94, 0.35), 0 0 40px rgba(49, 46, 129, 0.5);
  --shadow-glow: 0 0 35px rgba(56, 189, 248, 0.3);
}

/* 基础全局配置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-event-horizon);
  color: var(--text-main);
  line-height: 1.65;
  transition: background-color var(--trans-normal), color var(--trans-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* 宇宙星云背景图层 (Cosmic Starfield & Space Folds) */
.cosmic-nebula-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -2;
  background: 
    radial-gradient(circle at 20% 15%, var(--twilight-indigo-glow) 0%, transparent 45%),
    radial-gradient(circle at 80% 25%, var(--portal-rose-glow) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, var(--warp-blue-glow) 0%, transparent 50%);
  filter: blur(55px);
  opacity: 0.85;
}

/* 布局系统 */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-py {
  padding-top: 90px;
  padding-bottom: 90px;
  position: relative;
}

/* 顶部导航栏 Header (Dark Glass HUD) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-glass);
  transition: background-color var(--trans-normal), border-color var(--trans-normal);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 850;
  font-size: 1.35rem;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #5db8f4 0%, #7988f4 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #132138;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-weight: 900;
  font-size: 19px;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(93, 184, 244, 0.4);
  flex-shrink: 0;
  user-select: none;
  transition: transform var(--trans-fast);
}

.brand-logo:hover .brand-icon {
  transform: scale(1.06);
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  color: var(--text-main);
}

.brand-tld {
  font-weight: 700;
  color: var(--portal-rose);
  margin-left: 1px;
}

.brand-tag {
  font-size: 0.68rem;
  padding: 2px 7px;
  background: rgba(244, 63, 94, 0.12);
  color: var(--portal-rose);
  border-radius: var(--radius-full);
  font-weight: 700;
  border: 1px solid rgba(244, 63, 94, 0.3);
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 550;
  transition: all var(--trans-fast);
  position: relative;
  padding: 6px 4px;
}

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

.nav-link.badge-news {
  position: relative;
  color: var(--warp-blue);
  font-weight: 650;
}

.nav-link.badge-news::after {
  content: 'HOT';
  font-size: 0.62rem;
  position: absolute;
  top: -4px;
  right: -18px;
  background: var(--portal-rose);
  color: #fff;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 800;
  line-height: 1;
}

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

/* 精致毛玻璃昼夜模式切换按钮 */
.theme-toggle-btn {
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  background: rgba(148, 163, 184, 0.24);
  border-color: var(--portal-rose);
  transform: translateY(-1.5px);
  box-shadow: 0 0 16px var(--portal-rose-glow);
}

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

/* 按钮体系 (严格遵守 rel="nofollow" target="_blank") */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 650;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: 11px 24px;
  font-size: 0.95rem;
  transition: all var(--trans-fast);
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #4338ca 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 50%, #3730a3 100%);
  box-shadow: 0 8px 26px rgba(37, 99, 235, 0.48), 0 0 15px var(--portal-rose-glow);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-rose {
  background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(244, 63, 94, 0.38);
}

.btn-rose:hover {
  background: linear-gradient(135deg, #e11d48 0%, #be123c 100%);
  box-shadow: 0 8px 28px rgba(244, 63, 94, 0.55);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-hud);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-hud-hover);
  border-color: var(--portal-rose);
  color: var(--portal-rose);
  transform: translateY(-1.5px);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-md);
}

/* ===================================================================
   主视觉区 (Warp-Portal Architecture & Interactive Doorway)
   =================================================================== */
.hero-portal-section {
  padding: 70px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
}

/* 左侧文本与呼吁控制台 */
.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 2;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

.status-dot-pulse {
  width: 9px;
  height: 9px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-headline {
  font-size: clamp(1.28rem, 2.6vw, 2.55rem);
  font-weight: 900;
  line-height: 1.26;
  letter-spacing: -0.6px;
  margin-bottom: 22px;
  word-break: keep-all;
}

.hero-headline-line {
  display: block;
  white-space: nowrap;
}

.gradient-rose-indigo {
  background: linear-gradient(135deg, var(--portal-rose) 0%, #a855f7 45%, var(--warp-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-intro {
  font-size: clamp(1.02rem, 1.8vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 34px;
  max-width: 580px;
}

.hero-cta-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-features-chips {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.hero-feature-chip {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-feature-chip svg {
  color: var(--portal-rose);
}

/* 右侧：互动式 3D 穿梭门 (3D Interactive Warp Portal) */
.portal-stage {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1200px;
  min-height: 520px;
}

/* 背景折叠光环 */
.portal-space-aura {
  position: absolute;
  width: 440px;
  height: 540px;
  border-radius: var(--radius-portal);
  background: radial-gradient(circle at 50% 50%, var(--portal-rose-glow) 0%, var(--twilight-indigo-glow) 50%, transparent 75%);
  filter: blur(40px);
  z-index: 0;
  animation: auraFloat 6s ease-in-out infinite alternate;
}

@keyframes auraFloat {
  0% { transform: scale(0.96) rotate(-2deg); opacity: 0.7; }
  100% { transform: scale(1.05) rotate(2deg); opacity: 0.95; }
}

/* /* 任意门物理外门框 (Portal Archway Frame - 统一无遮挡高维视窗) */
.portal-archway {
  position: relative;
  width: 300px;
  height: 450px;
  border-radius: var(--radius-portal);
  background: linear-gradient(180deg, rgba(244, 63, 94, 0.45) 0%, rgba(49, 46, 129, 0.75) 100%);
  padding: 6px;
  box-shadow: var(--shadow-portal);
  z-index: 2;
  cursor: pointer;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.5s ease;
}

.portal-archway:hover,
.portal-archway.warping {
  transform: scale(1.025) translateY(-4px);
  box-shadow: 0 0 45px rgba(244, 63, 94, 0.5), 0 0 35px rgba(56, 189, 248, 0.4);
}

/* 门框边缘时空折射流光 */
.portal-archway::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: var(--radius-portal);
  background: linear-gradient(135deg, var(--portal-rose) 0%, var(--warp-blue) 50%, var(--twilight-indigo) 100%);
  z-index: -1;
  opacity: 0.85;
  filter: blur(3px);
}

/* 门洞内舱 (Portal Interior Vortex) */
.portal-interior {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 134px 134px 12px 12px;
  background: #040508;
  overflow: hidden;
  box-shadow: inset 0 0 45px rgba(0, 0, 0, 0.95), inset 0 0 25px var(--twilight-indigo);
}

/* 侧边量子发光状态指示条 */
.portal-quantum-edge {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 56px;
  border-radius: 99px;
  background: linear-gradient(180deg, #f43f5e 0%, #e11d48 100%);
  box-shadow: 0 0 14px var(--portal-rose);
  opacity: 0.85;
  z-index: 3;
}

/* 门洞背景时空虫洞粒子与网格 */
.portal-vortex-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.15) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: center bottom;
  transform: perspective(300px) rotateX(60deg) translateY(20px);
  transform-origin: center bottom;
  opacity: 0.4;
  animation: gridWarp 8s linear infinite;
}

@keyframes gridWarp {
  0% { background-position: 0 0; }
  100% { background-position: 0 80px; }
}

/* 门内统一遥测 HUD (单一清晰图层，层级分明，绝无双层文字重叠) */
.portal-hud-content {
  position: relative;
  z-index: 2;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
  padding: 24px 20px;
  text-align: center;
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
  padding-bottom: 12px;
}

.telemetry-tag {
  font-size: 0.74rem;
  font-weight: 800;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.telemetry-ping {
  font-size: 0.82rem;
  font-weight: 750;
  color: var(--accent-emerald);
}

/* 中部全息穿梭目标 (清爽直观) */
.telemetry-destination {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: auto 0;
  padding: 10px 0;
}

.dest-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, #5db8f4, #7988f4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 900;
  color: #132138;
  margin-bottom: 14px;
  box-shadow: 0 0 22px rgba(93, 184, 244, 0.45);
}

.dest-city {
  font-size: 1.55rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 6px;
  letter-spacing: -0.5px;
}

.dest-line {
  font-size: 0.88rem;
  color: var(--warp-blue);
  font-weight: 650;
  margin-bottom: 12px;
}

.dest-hint {
  font-size: 0.74rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  display: inline-block;
}

/* 底部遥测规格 */
.telemetry-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.75rem;
  backdrop-filter: blur(8px);
}

.spec-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.spec-val {
  font-weight: 850;
  color: #ffffff;
  font-size: 0.88rem;
}

.spec-lbl {
  color: #94a3b8;
  font-size: 0.68rem;
  margin-top: 2px;
}

/* 悬浮暗色玻璃 HUD 卡片 (浮动在拱门外缘两侧，完全避开门内文字) */
.hud-card-float {
  position: absolute;
  background: var(--bg-hud);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  z-index: 5;
  transition: all var(--trans-fast);
  white-space: nowrap;
}

.hud-card-float:hover {
  border-color: var(--portal-rose);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* 浮动在拱门左肩上方，完全不遮挡门内任何文字 */
.hud-float-1 {
  top: -15px;
  left: -45px;
  animation: floatCardA 5s ease-in-out infinite alternate;
}

/* 浮动在拱门右底座下方，完全不遮挡门内任何文字 */
.hud-float-2 {
  bottom: -15px;
  right: -40px;
  animation: floatCardB 6s ease-in-out infinite alternate;
}

@keyframes floatCardA {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

@keyframes floatCardB {
  0% { transform: translateY(0); }
  100% { transform: translateY(8px); }
}

.hud-icon-badge {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hud-icon-badge.rose {
  background: rgba(244, 63, 94, 0.15);
  color: var(--portal-rose);
}

.hud-icon-badge.blue {
  background: rgba(56, 189, 248, 0.15);
  color: var(--warp-blue);
}

.hud-info h5,
.hud-info strong,
.hud-info .hud-chip-title {
  display: block;
  font-size: 0.86rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 2px;
}

.hud-info p {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* 维度穿梭目标切换控制器 (Regional Destination Fold Controls) */
.destination-switch-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.dest-btn {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 650;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--trans-fast);
  backdrop-filter: blur(8px);
}

.dest-btn:hover {
  border-color: var(--portal-rose);
  color: var(--portal-rose);
  transform: translateY(-1.5px);
}

.dest-btn.active {
  background: var(--portal-rose);
  border-color: var(--portal-rose);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
}

/* ===================================================================
   产品核心优势 (3个图文卡片 · 空间折叠微拟态)
   =================================================================== */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--portal-rose);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.5rem);
  font-weight: 850;
  margin-bottom: 14px;
  letter-spacing: -0.8px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--trans-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* 悬停边缘折射光晕 (Refraction Boundary Pattern) */
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--portal-rose) 0%, var(--twilight-indigo) 50%, var(--warp-blue) 100%);
  opacity: 0;
  transition: opacity var(--trans-fast);
}

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

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

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon-wrap.bg-rose {
  background: rgba(244, 63, 94, 0.15);
  color: var(--portal-rose);
}

.feature-icon-wrap.bg-indigo {
  background: rgba(67, 56, 202, 0.16);
  color: var(--twilight-indigo);
}

.feature-icon-wrap.bg-blue {
  background: rgba(2, 132, 199, 0.15);
  color: var(--warp-blue);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 22px;
}

.feature-points {
  list-style: none;
  margin-top: auto;
  border-top: 1px dashed var(--border-glass);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

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

/* ===================================================================
   流媒体 & AI 支持图卡 (Showcase 2 Cards)
   =================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.showcase-card {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all var(--trans-normal);
  backdrop-filter: blur(14px);
}

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

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 750;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  width: fit-content;
}

.badge-stream {
  background: rgba(244, 63, 94, 0.12);
  color: var(--portal-rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.badge-ai {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.showcase-title {
  font-size: 1.5rem;
  font-weight: 850;
  margin-bottom: 12px;
}

.showcase-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.brand-chips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.brand-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 12px 8px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all var(--trans-fast);
}

.brand-chip:hover {
  border-color: var(--portal-rose);
  color: var(--portal-rose);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.brand-chip-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.showcase-footer-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--border-glass);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.status-online {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-emerald);
  font-weight: 650;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
}

/* ===================================================================
   套餐价格对比表 (参考行业真实真实价格体系)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--trans-normal);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

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

.pricing-card.featured {
  border: 2px solid var(--portal-rose);
  box-shadow: var(--shadow-portal);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-5px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--portal-rose) 0%, #be123c 100%);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.45);
}

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

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 850;
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

.price-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--portal-rose);
}

.price-amount {
  font-size: 2.9rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  letter-spacing: -1px;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
  flex-grow: 1;
  font-size: 0.93rem;
}

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

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

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

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

.pricing-cta {
  width: 100%;
  margin-top: auto;
}

/* ===================================================================
   用户口碑评价 (Testimonials)
   =================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  transition: all var(--trans-fast);
}

.review-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-portal);
}

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

.review-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  font-style: normal;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(244, 63, 94, 0.14);
  color: var(--portal-rose);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  border: 2px solid rgba(244, 63, 94, 0.35);
}

.author-info h3,
.author-info h4 {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--text-main);
  margin: 0 0 2px;
}

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

/* ===================================================================
   常见问题 FAQ 手风琴
   =================================================================== */
.faq-wrapper {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.faq-item {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--trans-fast);
  backdrop-filter: blur(12px);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.06rem;
  font-weight: 750;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 14px;
}

.faq-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  transition: transform var(--trans-fast);
  color: var(--portal-rose);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 22px;
  transition: max-height 0.35s ease-in-out;
}

.faq-answer p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   底部行动召唤 Banner
   =================================================================== */
.bottom-cta-banner {
  background: linear-gradient(135deg, #1e1b4b 0%, #040508 100%);
  border: 1px solid var(--border-portal);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  margin-top: 50px;
  box-shadow: var(--shadow-portal);
}

.bottom-cta-banner h2 {
  font-size: clamp(1.9rem, 3.8vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 14px;
}

.bottom-cta-banner p {
  font-size: 1.08rem;
  color: #cbd5e1;
  max-width: 640px;
  margin: 0 auto 30px;
}

/* ===================================================================
   页脚 (Footer) - 严格保留 4 个标题，并在新页面打开
   =================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-glass);
  padding: 54px 0 38px;
  margin-top: auto;
  transition: background-color var(--trans-normal);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 850;
  color: var(--text-main);
  text-decoration: none;
}

/* 严格限定页脚只保留这四个标题 */
.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 1.02rem;
  font-weight: 650;
  transition: all var(--trans-fast);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
}

.footer-nav a:hover {
  color: var(--portal-rose);
  background: rgba(244, 63, 94, 0.12);
}

.footer-copyright {
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* ===================================================================
   次级页面专用布局 (about, terms, privacy, sitemap, news)
   =================================================================== */
.page-header {
  padding: 55px 0 35px;
  text-align: center;
  border-bottom: 1px solid var(--border-glass);
  background: var(--bg-surface-glass);
  backdrop-filter: blur(14px);
}

.page-title {
  font-size: clamp(2rem, 4vw, 2.7rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

.content-box {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin: 44px auto 65px;
  max-width: 880px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

.content-box h2 {
  font-size: 1.48rem;
  margin: 34px 0 16px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 2px solid var(--border-glass);
  padding-bottom: 10px;
}

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

.content-box p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.8;
}

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

.content-box li {
  margin-bottom: 9px;
}

.sitemap-links-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 20px;
  list-style: none;
  padding: 0;
}

.sitemap-card {
  padding: 22px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  text-decoration: none;
  display: block;
  transition: all var(--trans-fast);
}

.sitemap-card:hover {
  border-color: var(--portal-rose);
  transform: translateY(-2.5px);
  box-shadow: var(--shadow-sm);
}

.sitemap-card h3 {
  font-size: 1.12rem;
  color: var(--text-main);
  margin-bottom: 6px;
}

.sitemap-card p {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: 0;
}

/* 推荐资讯列表样式 */
.news-feed-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 24px;
}

.news-article-card {
  display: block;
  text-decoration: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--trans-fast);
}

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

.news-article-card:hover .news-title {
  color: var(--portal-rose);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-tag {
  background: rgba(244, 63, 94, 0.12);
  color: var(--portal-rose);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
}

.news-title {
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--text-main);
  margin-bottom: 12px;
}

.news-summary {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   响应式媒体查询适配 (@media)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-intro {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-cta-wrap {
    justify-content: center;
  }
  .hero-features-chips {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
    order: -1;
    grid-column: span 2;
  }
  .pricing-card.featured:hover {
    transform: translateY(-5px);
  }
}

@media (max-width: 768px) {
  .section-py {
    padding-top: 60px;
    padding-bottom: 60px;
  }

  .nav-menu {
    display: none; /* 移动端精简模式 */
  }

  .features-grid,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .sitemap-links-list {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    grid-column: auto;
  }

  .hud-float-1,
  .hud-float-2 {
    display: none; /* 手机端隐藏悬浮气泡保证主穿梭门居中清晰 */
  }

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

  .hero-headline {
    font-size: clamp(1.2rem, 5.2vw, 1.85rem);
  }

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

  .hero-cta-wrap .btn {
    width: 100%;
    min-height: 50px;
    font-size: 1.05rem;
  }

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

  .content-box {
    padding: 26px 18px;
  }
}

/* ===================================================================
   长篇深度 SEO 文章专用样式系统 (Article, TOC, FAQ, Related)
   =================================================================== */
.article-container {
  max-width: 900px;
  margin: 40px auto 70px;
  padding: 0 20px;
}

.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 26px;
}

.article-tags-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.article-tag {
  background: rgba(244, 63, 94, 0.12);
  color: var(--portal-rose);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 750;
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.article-title {
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  font-weight: 900;
  line-height: 1.28;
  margin-bottom: 18px;
  letter-spacing: -0.6px;
  color: var(--text-main);
}

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

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

/* 目录 Table of Contents */
.article-toc {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-left: 4px solid var(--portal-rose);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 850;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-toc-list a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list a:hover {
  color: var(--portal-rose);
  transform: translateX(4px);
}

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

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 850;
  margin: 44px 0 18px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 12px;
  letter-spacing: -0.4px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-body p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  color: var(--text-secondary);
}

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

.article-callout {
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.25);
  border-left: 4px solid var(--warp-blue);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 26px 0;
}

.article-callout.rose {
  background: rgba(244, 63, 94, 0.08);
  border-color: rgba(244, 63, 94, 0.25);
  border-left-color: var(--portal-rose);
}

.article-callout-title {
  font-size: 1.02rem;
  font-weight: 800;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-callout p {
  margin: 0;
  font-size: 0.96rem;
}

/* 内链样式 */
.internal-link {
  color: var(--warp-blue);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--trans-fast);
}

.internal-link:hover {
  color: var(--portal-rose);
}

/* 响应式数据表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
  background: var(--bg-surface);
}

.article-table th {
  background: var(--bg-hud);
  color: var(--text-main);
  padding: 14px 18px;
  font-weight: 800;
  border-bottom: 1px solid var(--border-glass);
  white-space: nowrap;
}

.article-table td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-secondary);
}

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

/* 常见问答 FAQ 区块 */
.article-faq-section {
  margin: 48px 0;
  padding-top: 24px;
  border-top: 2px dashed var(--border-glass);
}

.faq-card-item {
  background: var(--bg-hud);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.faq-card-item h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-card-item p {
  margin: 0;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 相关阅读与扩展链接 */
.article-related-section {
  margin: 50px 0 20px;
  padding-top: 30px;
  border-top: 1px solid var(--border-glass);
}

.article-related-title {
  font-size: 1.35rem;
  font-weight: 850;
  margin-bottom: 22px;
  color: var(--text-main);
}

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

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  text-decoration: none;
  transition: all var(--trans-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  border-color: var(--portal-rose);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.related-card h5 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.55;
}

/* 文章底部 CTA 挂件 */
.article-bottom-cta {
  background: linear-gradient(135deg, #1e1b4b 0%, #040508 100%);
  border: 1px solid var(--border-portal);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  margin: 45px 0 10px;
  color: #fff;
  box-shadow: var(--shadow-portal);
}

.article-bottom-cta h3 {
  font-size: 1.6rem;
  font-weight: 850;
  margin-bottom: 10px;
}

.article-bottom-cta p {
  color: #cbd5e1;
  font-size: 0.98rem;
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  .article-related-grid {
    grid-template-columns: 1fr;
  }
  .article-container {
    padding: 0 14px;
    margin-top: 24px;
  }
  .article-toc {
    padding: 18px 20px;
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: clamp(1.08rem, 5.4vw, 1.38rem);
  }
}