/* ==========================================================================
   Nexitally奶昔机场 - Cashmere-Cream Luxury 原生极简样式表
   UI主题：Viscous Cashmere-Cream Luxury Palette (羊绒凝乳奢华质感)
   专为顶级专线品牌 Nexitally 打造 · 纯原生 CSS · 零外部重型依赖
   ========================================================================== */

/* --------------------------------------------------
   1. 奢华配色变量与流体物理系统 (默认温暖浅色奶霜白)
   -------------------------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, Monaco, monospace;

  /* 核心奶香奢华色谱 (Viscous Cashmere-Cream Palette) */
  --bg-canvas: #fcfbf7;            /* 温暖羊绒打底生乳白 (whipped-cream ivory) */
  --bg-surface: #ffffff;           /* 凝脂白卡片载体 */
  --bg-surface-elevated: #faf8f3;  /* 微升浮奶霜底色 */
  --bg-subtle: #f3f1ea;            /* 燕麦奶霜灰 (frosted oat-milk grey) */
  --bg-glass: rgba(252, 251, 247, 0.82);

  /* 浓缩意式咖啡墨黑排版 (dense espresso typography) */
  --text-espresso: #191816;        /* 稠密浓缩浓黑 */
  --text-body: #44403a;            /* 柔和黑咖啡中调 */
  --text-muted: #7e786d;           /* 羊绒柔灰浅调 */
  --text-subtle: #a69f92;          /* 极浅灰字 */

  /* 珍珠流光与轻奢香槟金点缀 (subtle pearlescent highlights) */
  --pearl-glow: rgba(212, 184, 135, 0.18);
  --pearl-accent: #a38248;         /* 润泽香槟古金 */
  --pearl-accent-hover: #8c6e38;
  --pearl-gradient: linear-gradient(135deg, #191816 0%, #35322b 60%, #524d43 100%);
  --pearl-border: rgba(163, 130, 72, 0.22);
  --accent-pill-bg: rgba(163, 130, 72, 0.08);

  /* 边框与微光折射 */
  --border-light: #e8e4db;
  --border-glass: rgba(25, 24, 22, 0.07);
  --rim-refraction: inset 0 1px 1px 0 rgba(255, 255, 255, 0.95), inset 0 -1px 2px 0 rgba(25, 24, 22, 0.03);

  /* 深层漫反射微重力阴影 (deep diffuse ambient occlusion) */
  --shadow-velvet-sm: 0 4px 14px -2px rgba(25, 24, 22, 0.04), 0 2px 6px -1px rgba(25, 24, 22, 0.02);
  --shadow-velvet-md: 0 16px 36px -8px rgba(25, 24, 22, 0.06), 0 4px 12px -2px rgba(25, 24, 22, 0.03);
  --shadow-velvet-lg: 0 32px 68px -14px rgba(25, 24, 22, 0.09), 0 12px 24px -4px rgba(25, 24, 22, 0.04);
  --shadow-cta: 0 16px 32px -8px rgba(25, 24, 22, 0.35);

  /* 有机枕型圆角 (Organic Pillow-Soft Radii) */
  --radius-pillow: 32px;
  --radius-card: 22px;
  --radius-item: 16px;
  --radius-full: 9999px;

  /* 表面张力黏滞过渡系统 (Viscoelastic Damping) */
  --viscous-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --viscous-smooth: cubic-bezier(0.25, 1, 0.5, 1);
  --transition-squish: transform 0.4s var(--viscous-bounce), box-shadow 0.4s ease, border-color 0.3s ease;
  --transition-theme: background-color 0.45s ease, color 0.45s ease, border-color 0.45s ease, box-shadow 0.45s ease;

  /* 昼夜切换按钮 */
  --toggle-btn-bg: rgba(25, 24, 22, 0.04);
  --toggle-btn-border: rgba(25, 24, 22, 0.1);
  --toggle-btn-icon: #191816;
}

/* --------------------------------------------------
   2. 深色模式：烟熏松露黑巧与暗金 (Smoked Truffle & Dark Espresso)
   -------------------------------------------------- */
[data-theme="dark"] {
  --bg-canvas: #121110;            /* 烟熏深咖黑 */
  --bg-surface: #1a1917;           /* 松露巧黑载体 */
  --bg-surface-elevated: #22201d;  /* 微升黑曜岩底色 */
  --bg-subtle: #1c1b18;            /* 暗温燕麦灰 */
  --bg-glass: rgba(18, 17, 16, 0.85);

  --text-espresso: #f7f5ef;        /* 亮霜奶昔白 */
  --text-body: #cfcac0;            /* 浅羊绒灰白 */
  --text-muted: #8c867a;           /* 柔暮灰 */
  --text-subtle: #635e54;

  --pearl-glow: rgba(212, 184, 135, 0.15);
  --pearl-accent: #d8b877;
  --pearl-accent-hover: #ead099;
  --pearl-gradient: linear-gradient(135deg, #f7f5ef 0%, #d8b877 60%, #b89858 100%);
  --pearl-border: rgba(216, 184, 119, 0.28);
  --accent-pill-bg: rgba(216, 184, 119, 0.12);

  --border-light: rgba(247, 245, 239, 0.08);
  --border-glass: rgba(247, 245, 239, 0.1);
  --rim-refraction: inset 0 1px 1px 0 rgba(247, 245, 239, 0.12), inset 0 -1px 2px 0 rgba(0, 0, 0, 0.5);

  --shadow-velvet-sm: 0 4px 14px -2px rgba(0, 0, 0, 0.4);
  --shadow-velvet-md: 0 16px 36px -8px rgba(0, 0, 0, 0.6);
  --shadow-velvet-lg: 0 32px 68px -14px rgba(0, 0, 0, 0.8);
  --shadow-cta: 0 16px 36px -8px rgba(216, 184, 119, 0.25);

  --toggle-btn-bg: rgba(247, 245, 239, 0.08);
  --toggle-btn-border: rgba(247, 245, 239, 0.16);
  --toggle-btn-icon: #f7f5ef;
}

/* --------------------------------------------------
   3. 全局重置与排版规范
   -------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-body);
  transition: var(--transition-theme);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 非牛顿流体光影层 (Displacement Fluid Caustics) */
.fluid-caustics-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
  background: radial-gradient(circle 600px at var(--mouse-x, 50%) var(--mouse-y, 30%), rgba(212, 184, 135, 0.08), transparent 70%);
  transition: opacity 0.5s ease;
}

[data-theme="dark"] .fluid-caustics-layer {
  background: radial-gradient(circle 650px at var(--mouse-x, 50%) var(--mouse-y, 30%), rgba(216, 184, 119, 0.05), transparent 75%);
  opacity: 0.8;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

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

.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
  position: relative;
  z-index: 1;
}

.section-spacer {
  padding: 100px 0;
  position: relative;
}

@media (max-width: 768px) {
  .section-spacer {
    padding: 60px 0;
  }
}

/* 奢华浓缩咖啡与珠光标题字 */
.espresso-title {
  color: var(--text-espresso);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.22;
}

.pearlescent-text {
  background: linear-gradient(135deg, #a38248 0%, #c5a059 50%, #8c6e38 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

[data-theme="dark"] .pearlescent-text {
  background: linear-gradient(135deg, #e5cf9d 0%, #f7f5ef 50%, #d8b877 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 区域头部统一样式 */
.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 60px auto;
}

.fluid-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: var(--accent-pill-bg);
  color: var(--pearl-accent);
  border: 1px solid var(--pearl-border);
  margin-bottom: 20px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  box-shadow: var(--shadow-velvet-sm);
  backdrop-filter: blur(8px);
  white-space: nowrap;
}

.section-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-top: 16px;
}

/* --------------------------------------------------
   4. 粘性顶部导航栏 (Navbar with Comprehensive Anchors)
   -------------------------------------------------- */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-velvet-sm);
  transition: var(--transition-theme);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.24rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-espresso);
}

.brand-emblem {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--pearl-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f7f5ef;
  box-shadow: 0 6px 14px rgba(25, 24, 22, 0.15);
  box-shadow: var(--rim-refraction);
}

[data-theme="dark"] .brand-emblem {
  color: #191816;
}

/* 导航目录：首页 + 每个板块 + 推荐资讯 */
.nav-directory {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 22px;
}

.nav-directory a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-body);
  padding: 8px 6px;
  position: relative;
  transition: color 0.2s ease;
}

.nav-directory a:hover,
.nav-directory a.active {
  color: var(--text-espresso);
  font-weight: 700;
}

.nav-directory a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--pearl-accent);
  transition: transform 0.25s var(--viscous-bounce);
}

.nav-directory a:hover::after,
.nav-directory a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* 特色：‘推荐资讯’专享高光胶囊徽章入口 */
.nav-directory a.nav-highlight-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--accent-pill-bg);
  color: var(--pearl-accent);
  border: 1px solid var(--pearl-border);
  font-weight: 600;
}

.nav-directory a.nav-highlight-link::after {
  display: none;
}

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

/* 精致专业化昼夜模式切换按钮 */
.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--toggle-btn-bg);
  border: 1px solid var(--toggle-btn-border);
  color: var(--toggle-btn-icon);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
  border-color: var(--pearl-accent);
}

.theme-toggle-btn:active {
  transform: scale(0.92);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.4s var(--viscous-bounce), opacity 0.3s ease;
}

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

/* 奢华质感按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  transition: var(--transition-squish);
  box-shadow: var(--rim-refraction);
  cursor: pointer;
  white-space: nowrap;
}

/* 表面张力回弹微交互 (Soft-body squish by 2px on active) */
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-velvet-md);
}

.btn:active {
  transform: scale(0.98) translateY(2px) !important;
}

.btn-luxury-dark {
  background: var(--pearl-gradient);
  color: #fcfbf7;
  box-shadow: var(--shadow-cta);
}

.btn-luxury-dark:hover {
  color: #ffffff;
  box-shadow: 0 18px 36px -6px rgba(25, 24, 22, 0.45);
}

[data-theme="dark"] .btn-luxury-dark {
  background: linear-gradient(135deg, #d8b877 0%, #edd8a8 60%, #c49e54 100%);
  color: #121110;
  box-shadow: var(--shadow-cta);
}

.btn-cream-surface {
  background-color: var(--bg-surface);
  color: var(--text-espresso);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-velvet-sm);
}

.btn-cream-surface:hover {
  border-color: var(--pearl-border);
  background-color: var(--bg-surface-elevated);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
  font-weight: 700;
}

/* 移动端菜单按钮 */
.mobile-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-item);
  background: var(--toggle-btn-bg);
  border: 1px solid var(--toggle-btn-border);
  color: var(--text-espresso);
  align-items: center;
  justify-content: center;
}

/* --------------------------------------------------
   5. 主视觉区 (Hero Section - Headline + 简介 + 延时流体微交互)
   -------------------------------------------------- */
.hero-section {
  position: relative;
  padding: 100px 0 90px 0;
  text-align: center;
}

.hero-surface-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--text-body);
  box-shadow: var(--shadow-velvet-sm);
  margin-bottom: 28px;
  box-shadow: var(--rim-refraction);
  white-space: nowrap;
}

.pulse-drop {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--pearl-accent);
  box-shadow: 0 0 0 3px rgba(163, 130, 72, 0.25);
  animation: liquidPulse 3s ease-in-out infinite;
}

@keyframes liquidPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.7; }
}

.hero-headline {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.04em;
  margin-bottom: 26px;
  color: var(--text-espresso);
}

.hero-intro {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 780px;
  margin: 0 auto 40px auto;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* 等宽毫秒级专线延迟监视仪 (Monospace Latency Module) */
.latency-cockpit {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 24px 32px;
  box-shadow: var(--shadow-velvet-md);
  box-shadow: var(--rim-refraction);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  transition: var(--transition-theme);
}

.latency-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 12px;
  border-right: 1px solid var(--border-light);
}

.latency-item:last-child {
  border-right: none;
}

.latency-region {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.latency-val {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-espresso);
  letter-spacing: -0.02em;
}

.latency-unit {
  font-size: 0.8rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* --------------------------------------------------
   6. 产品核心优势 (3个有机枕型图文卡片)
   -------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.organic-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 44px 34px;
  box-shadow: var(--shadow-velvet-sm);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  display: flex;
  flex-direction: column;
  position: relative;
}

.organic-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-velvet-lg);
  border-color: var(--pearl-border);
}

.organic-card:active {
  transform: scale(0.985) translateY(2px);
}

.luxury-glyph-wrapper {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-card);
  background: var(--bg-subtle);
  color: var(--pearl-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  box-shadow: var(--rim-refraction);
}

.luxury-glyph-wrapper svg {
  width: 32px;
  height: 32px;
}

.card-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-espresso);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-body);
}

.spec-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--pearl-accent);
  flex-shrink: 0;
}

/* --------------------------------------------------
   7. 流媒体与 AI 支持图卡 (两大多媒体专属展示卡片)
   -------------------------------------------------- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.showcase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 46px 40px;
  box-shadow: var(--shadow-velvet-md);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  display: flex;
  flex-direction: column;
}

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

.showcase-card:active {
  transform: scale(0.985) translateY(2px);
}

.dairy-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0;
}

.dairy-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-espresso);
  box-shadow: var(--rim-refraction);
  transition: all 0.25s ease;
  white-space: nowrap;
}

.dairy-tag:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--pearl-border);
  transform: translateY(-2px);
}

.dairy-tag-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.showcase-feature-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px dashed var(--border-light);
}

.showcase-point {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.showcase-point strong {
  color: var(--text-espresso);
}

/* --------------------------------------------------
   8. 套餐价格对比表 (真实的网上套餐价格体系)
   -------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 44px 34px;
  box-shadow: var(--shadow-velvet-sm);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-velvet-lg);
}

.pricing-card:active {
  transform: scale(0.985) translateY(2px);
}

/* 主力旗舰款高光高阶样式 */
.pricing-card.flagship-tier {
  border: 2px solid var(--pearl-accent);
  background: var(--bg-surface-elevated);
  box-shadow: var(--shadow-velvet-lg);
  transform: scale(1.03);
}

.pricing-card.flagship-tier:hover {
  transform: scale(1.03) translateY(-8px);
}

.flagship-ribbon {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pearl-gradient);
  color: #f7f5ef;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.6px;
  box-shadow: 0 6px 16px rgba(25, 24, 22, 0.2);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: max-content;
  max-width: 92%;
  z-index: 2;
}

[data-theme="dark"] .flagship-ribbon {
  color: #121110;
}

.tier-code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--pearl-accent);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.tier-name {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-espresso);
  margin-bottom: 10px;
}

.tier-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  min-height: 48px;
  margin-bottom: 24px;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-espresso);
}

.price-num {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--text-espresso);
  line-height: 1;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.tier-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.tier-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--text-body);
}

.tier-feature-item strong {
  color: var(--text-espresso);
}

.check-glyph {
  color: var(--pearl-accent);
  flex-shrink: 0;
}

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

.review-capsule {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 36px 30px;
  box-shadow: var(--shadow-velvet-sm);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  display: flex;
  flex-direction: column;
}

.review-capsule:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-velvet-md);
  border-color: var(--pearl-border);
}

.review-stars {
  color: #c5a059;
  letter-spacing: 3px;
  margin-bottom: 18px;
  font-size: 1.05rem;
}

.review-body {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
}

.reviewer-monogram {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--pearl-gradient);
  color: #f7f5ef;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
}

[data-theme="dark"] .reviewer-monogram {
  color: #121110;
}

.reviewer-name {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-espresso);
}

.reviewer-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --------------------------------------------------
   10. 常见问题解答 (FAQ Accordion)
   -------------------------------------------------- */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-row {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-velvet-sm);
  box-shadow: var(--rim-refraction);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-row:hover {
  border-color: var(--pearl-border);
}

.faq-trigger {
  width: 100%;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-espresso);
  cursor: pointer;
  background: none;
  border: none;
}

.faq-chevron {
  width: 22px;
  height: 22px;
  color: var(--pearl-accent);
  transition: transform 0.35s var(--viscous-bounce);
  flex-shrink: 0;
}

.faq-row.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-collapsible {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--viscous-smooth), padding 0.35s ease;
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.faq-row.active .faq-collapsible {
  max-height: 520px;
  padding: 0 28px 26px 28px;
}

/* --------------------------------------------------
   11. 页脚 (Footer) - 严格仅保留四个核心标题
   -------------------------------------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 64px 0 40px 0;
  margin-top: auto;
  transition: var(--transition-theme);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 32px;
}

.footer-quad-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-quad-links a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-body);
  padding: 8px 6px;
  position: relative;
  transition: color 0.2s ease;
}

.footer-quad-links a:hover {
  color: var(--pearl-accent);
}

.footer-divider-line {
  width: 100%;
  max-width: 860px;
  height: 1px;
  background-color: var(--border-light);
}

.footer-copyright {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* --------------------------------------------------
   12. 资讯页与次级页面排版规范 (Cashmere Content Wrapper)
   -------------------------------------------------- */
.page-hero-banner {
  padding: 70px 0 50px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  background-color: var(--bg-surface);
}

.luxury-content-wrapper {
  max-width: 900px;
  margin: 50px auto 90px auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pillow);
  padding: 56px 48px;
  box-shadow: var(--shadow-velvet-md);
  box-shadow: var(--rim-refraction);
}

.content-block {
  margin-bottom: 40px;
}

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

.content-block h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-espresso);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-block p {
  font-size: 1.04rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 16px;
}

.callout-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--pearl-accent);
  border-radius: var(--radius-item);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-body);
}

/* 推荐资讯卡片流 */
.insight-article-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.insight-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-velvet-sm);
  box-shadow: var(--rim-refraction);
  transition: var(--transition-squish);
  display: flex;
  flex-direction: column;
}

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

.insight-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--pearl-accent);
  font-weight: 600;
  margin-bottom: 12px;
}

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

.insight-summary {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

/* --------------------------------------------------
   13. 响应式移动端适配 (@media queries)
   -------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-headline {
    font-size: 2.8rem;
  }
  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.flagship-tier {
    transform: none;
  }
  .pricing-card.flagship-tier:hover {
    transform: translateY(-6px);
  }
  .latency-cockpit {
    grid-template-columns: repeat(2, 1fr);
  }
  .latency-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .nav-directory {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-velvet-lg);
  }

  .nav-directory.active {
    display: flex;
  }

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

  .hero-headline {
    font-size: 2.2rem;
  }

  .hero-intro {
    font-size: 1.06rem;
  }

  .features-grid,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .latency-cockpit {
    grid-template-columns: 1fr;
  }

  .latency-item {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 12px;
  }
  .latency-item:last-child {
    border-bottom: none;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
  }

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

  .luxury-content-wrapper {
    padding: 30px 20px;
    border-radius: var(--radius-card);
  }
}