/* ==========================================================================
   红杏云 (Hongxing Cloud) - 官方推广落地页核心样式表
   风格体系：Sleek Dark Mode SaaS with Ambient Coral & Azure Mesh Glow
   调色系统：
   - 深度板岩曜黑：#0B0F19 (Deep Slate Obsidian)
   - 高级深色卡片：#131A2A (Elevated Dark Card Surface)
   - 活力珊瑚红：  #FF6B5B (Vibrant Coral Red)
   - 极光天蓝：    #0EA5E9 (Luminous Sky Blue / Azure)
   - 纯净晶白文字：#F8FAFC (Crisp Off-White Text)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量系统 (CSS Variables) - 默认高精暗夜模式，无缝兼容日间模式
   -------------------------------------------------------------------------- */
:root {
  /* 品牌核心双色：活力珊瑚红 & 极光天蓝 */
  --coral-primary: #FF6B5B;
  --coral-hover: #ff5240;
  --coral-glow: rgba(255, 107, 91, 0.35);
  --coral-glow-strong: rgba(255, 107, 91, 0.6);

  --azure-accent: #0EA5E9;
  --azure-hover: #0284c7;
  --azure-glow: rgba(14, 165, 233, 0.35);

  --brand-gradient: linear-gradient(135deg, #FF6B5B 0%, #0EA5E9 100%);
  --brand-gradient-hover: linear-gradient(135deg, #ff5240 0%, #0284c7 100%);
  --card-border-gradient: linear-gradient(135deg, rgba(255, 107, 91, 0.6), rgba(14, 165, 233, 0.6));

  /* 默认深色模式 (Sleek Dark Mode SaaS) */
  --bg-body: #0B0F19;
  --bg-surface: #101626;
  --bg-surface-elevated: #131A2A;
  --bg-card: rgba(19, 26, 42, 0.75);
  --bg-card-hover: rgba(23, 32, 52, 0.9);
  --bg-glass: rgba(11, 15, 25, 0.85);
  --bg-tag-coral: rgba(255, 107, 91, 0.12);
  --bg-tag-azure: rgba(14, 165, 233, 0.12);

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #0B0F19;

  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-card: rgba(148, 163, 184, 0.16);
  --border-highlight: rgba(255, 107, 91, 0.4);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.65);
  --shadow-xl: 0 24px 48px -6px rgba(0, 0, 0, 0.85);

  --badge-success-bg: rgba(16, 185, 129, 0.18);
  --badge-success-text: #34D399;

  --transition-speed: 0.3s;
  --transition-timing: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
}

/* 白天模式对应调色 (Light Mode Counterpart) */
[data-theme="light"] {
  --bg-body: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #F1F5F9;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-card-hover: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-tag-coral: rgba(255, 107, 91, 0.1);
  --bg-tag-azure: rgba(14, 165, 233, 0.1);

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  --border-subtle: rgba(226, 232, 240, 0.85);
  --border-card: rgba(226, 232, 240, 0.95);
  --border-highlight: rgba(255, 107, 91, 0.3);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 36px rgba(15, 23, 42, 0.12);

  --badge-success-bg: rgba(16, 185, 129, 0.1);
  --badge-success-text: #059669;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

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

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

/* --------------------------------------------------------------------------
   3. 布局与微动态背景系统 (Ambient Mesh Breathing Glows)
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: linear-gradient(180deg, transparent 0%, rgba(14, 165, 233, 0.03) 50%, transparent 100%);
}

/* 背景环境呼吸光晕 (Ambient Radial Mesh Glows) */
.ambient-glow-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-coral {
  position: absolute;
  top: 5%;
  right: -5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(255, 107, 91, 0.18) 0%, rgba(255, 107, 91, 0.03) 50%, transparent 75%);
  filter: blur(90px);
  animation: meshBreatheCoral 14s ease-in-out infinite alternate;
}

.ambient-glow-azure {
  position: absolute;
  top: 25%;
  left: -8%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.16) 0%, rgba(14, 165, 233, 0.03) 50%, transparent 75%);
  filter: blur(100px);
  animation: meshBreatheAzure 16s ease-in-out infinite alternate;
}

@keyframes meshBreatheCoral {
  0% { transform: scale(1) translate(0, 0); opacity: 0.7; }
  50% { transform: scale(1.15) translate(-30px, 40px); opacity: 1; }
  100% { transform: scale(0.95) translate(20px, -20px); opacity: 0.6; }
}

@keyframes meshBreatheAzure {
  0% { transform: scale(0.95) translate(0, 0); opacity: 0.6; }
  50% { transform: scale(1.18) translate(40px, -30px); opacity: 0.95; }
  100% { transform: scale(1) translate(-20px, 20px); opacity: 0.7; }
}

/* 标题头部排版 */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--bg-tag-coral);
  color: var(--coral-primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 107, 91, 0.25);
  box-shadow: 0 0 15px rgba(255, 107, 91, 0.1);
}

.section-tag-azure {
  background: var(--bg-tag-azure);
  color: var(--azure-accent);
  border-color: rgba(14, 165, 233, 0.25);
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.1);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 850;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   4. 粘性吸顶导航栏 (Translucent Dark Glass Navbar)
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-speed) var(--transition-timing);
}

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

/* 品牌 Logo: 几何珊瑚红 Logo + 红杏云官网 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--text-primary);
  letter-spacing: -0.015em;
}

.brand-logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(255, 126, 107, 0.45));
  transition: transform 0.25s ease, filter 0.25s ease;
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.03);
  filter: drop-shadow(0 0 18px rgba(255, 126, 107, 0.75));
}

.brand-icon-geom {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #FF6B5B 0%, #ff412e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--coral-glow);
  color: #FFFFFF;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.brand-icon-geom svg {
  width: 22px;
  height: 22px;
  z-index: 1;
}

.brand-title-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--azure-accent);
  background: var(--bg-tag-azure);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  margin-left: 6px;
  vertical-align: middle;
  border: 1px solid rgba(14, 165, 233, 0.25);
}

/* 导航目录 (包含首页、各功能板块及推荐资讯) */
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color 0.25s ease;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #FF6B5B, #0EA5E9);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.nav-link-badge {
  font-size: 0.65rem;
  background: linear-gradient(135deg, #FF6B5B, #0EA5E9);
  color: #fff;
  padding: 1px 6px;
  border-radius: 8px;
  margin-left: 4px;
  vertical-align: top;
}

/* 导航右侧控件群 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 中文 | EN 语言切换小胶囊 (Active Coral Highlight) */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  gap: 4px;
}

.lang-toggle .active {
  color: #fff;
  background: var(--coral-primary);
  border-radius: var(--radius-full);
  padding: 2px 7px;
  box-shadow: 0 0 8px var(--coral-glow);
}

.lang-toggle .inactive {
  padding: 2px 5px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.lang-toggle .inactive:hover {
  color: var(--text-primary);
}

/* 昼夜模式切换按钮：精致微发光胶囊按钮 */
.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--coral-primary);
  box-shadow: 0 0 12px rgba(255, 107, 91, 0.15);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  background: rgba(255, 107, 91, 0.15);
  border-color: rgba(255, 107, 91, 0.4);
  box-shadow: 0 0 20px var(--coral-glow);
  transform: translateY(-1px);
}

.theme-icon-sun,
.theme-icon-moon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

/* 默认暗黑模式：展现发光太阳图标，随时切换回白天模式 */
:root:not([data-theme="light"]) .theme-icon-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: #FBBF24; /* 太阳暖金发光 */
  filter: drop-shadow(0 0 6px rgba(251, 191, 36, 0.6));
}

:root:not([data-theme="light"]) .theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

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

[data-theme="light"] .theme-icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: #0EA5E9;
  filter: drop-shadow(0 0 6px rgba(14, 165, 233, 0.5));
}

/* 移动端汉堡按钮 */
.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   5. 通用按钮规范与发光光晕 (Glowing Hover Auras)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 650;
  font-size: 0.95rem;
  padding: 11px 26px;
  border-radius: var(--radius-full);
  transition: all 0.28s var(--transition-timing);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

/* 珊瑚红发光主按钮 (Glowing Coral CTA Button) */
.btn-coral {
  background: linear-gradient(135deg, #FF6B5B 0%, #ff4b38 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 18px var(--coral-glow);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-coral:hover {
  background: linear-gradient(135deg, #ff7a6c 0%, #ff5c4a 100%);
  box-shadow: 0 0 28px var(--coral-glow-strong), 0 6px 20px rgba(255, 107, 91, 0.4);
  transform: translateY(-2px);
  color: #FFFFFF;
}

/* 极光天蓝轮廓次按钮 (Sky-Blue Outline CTA Button) */
.btn-azure {
  background: rgba(14, 165, 233, 0.08);
  color: var(--azure-accent);
  border: 1px solid rgba(14, 165, 233, 0.35);
  box-shadow: 0 2px 12px rgba(14, 165, 233, 0.15);
}

.btn-azure:hover {
  background: rgba(14, 165, 233, 0.16);
  border-color: var(--azure-accent);
  box-shadow: 0 0 22px var(--azure-glow);
  color: #38bdf8;
  transform: translateY(-2px);
}

.btn-lg {
  font-size: 1.05rem;
  padding: 14px 34px;
  min-height: 52px;
}

.btn-sm {
  font-size: 0.86rem;
  padding: 8px 18px;
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   6. 主视觉区 (Hero Section - Bold White Headline + 详细简介 + 动态光标)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  padding: 100px 0 85px;
  overflow: hidden;
  text-align: center;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.hero-pill-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 10px #10B981;
  animation: pulseLight 2s infinite;
}

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

/* 大标题：必须包含当前品牌名“红杏云” */
.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  color: #FFFFFF;
}

.hero-brand-highlight {
  background: linear-gradient(135deg, #FF6B5B 0%, #0EA5E9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 30px rgba(255, 107, 91, 0.3));
}

/* 主视觉详细简介 (Muted Cool-Gray Subtitle) */
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 740px;
  margin: 0 auto 40px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}

/* 核心参数指标展示 (Luminous Coral & Azure Metrics: "300+ / 1000 / 24/7") */
.hero-metrics {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(14px);
}

.metric-item {
  text-align: center;
  padding: 0 16px;
  border-right: 1px solid var(--border-subtle);
}

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

.metric-number-coral {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--coral-primary);
  line-height: 1.05;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
  text-shadow: 0 0 25px var(--coral-glow);
}

.metric-number-azure {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--azure-accent);
  line-height: 1.05;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
  text-shadow: 0 0 25px var(--azure-glow);
}

.metric-label {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.metric-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   7. "为什么选择我们" 核心优势 (3个图文卡片 + 悬停渐变边框 + 数据脉冲微图)
   Strict Constraints: NO sparkles or starry icons. Geometric shield, routing, latency gauge.
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-md);
  transition: all 0.35s var(--transition-timing);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 悬停时激活 Coral-to-Azure 渐变边框高亮 */
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1.5px;
  background: var(--card-border-gradient);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7), 0 0 25px rgba(255, 107, 91, 0.2);
}

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

/* 矢量微拓扑图容器与数据包脉冲动画 */
.feature-micro-topology {
  width: 100%;
  height: 84px;
  background: rgba(11, 15, 25, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  position: relative;
  overflow: hidden;
}

.feature-micro-topology svg {
  width: 100%;
  height: 100%;
}

/* SVG 数据包脉冲微动画 (Animated SVG Data-Packet Pulses) */
.data-packet {
  animation: pulsePacket 2.5s infinite ease-in-out;
}

.data-packet-delay {
  animation: pulsePacket 2.5s infinite ease-in-out 1.25s;
}

@keyframes pulsePacket {
  0% { transform: scale(0.8); opacity: 0.3; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.8); opacity: 0.3; }
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.tech-tag {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--azure-accent);
  background: var(--bg-tag-azure);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

/* --------------------------------------------------------------------------
   8. 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-card);
  border-radius: var(--radius-lg);
  padding: 40px 34px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.showcase-header {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 24px;
}

.showcase-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--coral-primary);
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(255, 107, 91, 0.2);
}

.showcase-icon-box.azure-theme {
  color: var(--azure-accent);
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.2);
}

.showcase-title {
  font-size: 1.45rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.showcase-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 服务矩阵徽标 */
.service-badges-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 20px 0 26px;
}

.service-badge {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.25s ease;
  text-align: center;
}

.service-badge:hover {
  border-color: var(--coral-primary);
  transform: translateY(-3px);
  box-shadow: 0 4px 14px rgba(255, 107, 91, 0.2);
}

.service-badge svg {
  width: 26px;
  height: 26px;
}

.service-badge-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.service-badge-tag {
  font-size: 0.68rem;
  color: var(--coral-primary);
  background: var(--bg-tag-coral);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.showcase-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #10B981;
  font-weight: 600;
}

.status-indicator::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10B981;
  box-shadow: 0 0 8px #10B981;
}

/* --------------------------------------------------------------------------
   9. 套餐价格对比表 (参考网上真实主流专线机场价格与规格)
   -------------------------------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 42px 32px;
  box-shadow: var(--shadow-md);
  transition: all 0.35s var(--transition-timing);
  display: flex;
  flex-direction: column;
  position: relative;
}

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

/* 热门推荐高亮方案 (Coral & Azure Highlight) */
.pricing-card-popular {
  border: 2px solid var(--coral-primary);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 40px var(--coral-glow);
  transform: scale(1.02);
}

.pricing-card-popular:hover {
  transform: scale(1.02) translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #FF6B5B 0%, #ff412e 100%);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 750;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px var(--coral-glow);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.pricing-header {
  margin-bottom: 22px;
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 20px 0 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-subtle);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--coral-primary);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 950;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.04em;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  width: 17px;
  height: 17px;
  color: #10B981;
  flex-shrink: 0;
  margin-top: 3px;
}

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

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

.pricing-card-footer {
  margin-top: auto;
}

.pricing-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(255, 107, 91, 0.4);
}

.review-rating {
  display: flex;
  gap: 4px;
  color: #F59E0B;
  margin-bottom: 16px;
}

.review-rating svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.review-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-tag-coral);
  border: 1px solid rgba(255, 107, 91, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: var(--coral-primary);
  flex-shrink: 0;
}

.review-name {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--text-primary);
}

.review-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   11. 常见问题解答 (FAQ Accordion)
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(255, 107, 91, 0.35);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 26px;
}

.faq-item.active .faq-answer {
  padding-bottom: 22px;
}

.faq-answer-inner {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

/* --------------------------------------------------------------------------
   12. 极简底部转换区 (CTA Banner)
   -------------------------------------------------------------------------- */
.cta-banner {
  background: linear-gradient(135deg, #131A2A 0%, #1a2238 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 35px var(--coral-glow);
  margin-bottom: 80px;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 250px;
  background: radial-gradient(circle, var(--coral-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 34px;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   13. 规范页脚 (严格只保留四个标题，在新页面打开)
   -------------------------------------------------------------------------- */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 38px;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

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

.footer-link-item a {
  font-size: 0.96rem;
  font-weight: 650;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-link-item a:hover {
  color: var(--coral-primary);
  background: var(--bg-tag-coral);
}

.footer-link-item a svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

/* --------------------------------------------------------------------------
   14. 子页面与推荐资讯专属样式 (Subpages & News)
   -------------------------------------------------------------------------- */
.subpage-hero {
  padding: 70px 0 48px;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-body) 100%);
}

.subpage-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.subpage-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

.content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 50px 44px;
  box-shadow: var(--shadow-sm);
  margin: 48px 0 80px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.content-box h2 {
  font-size: 1.55rem;
  font-weight: 850;
  color: var(--text-primary);
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.content-box h3 {
  font-size: 1.18rem;
  font-weight: 750;
  color: var(--text-primary);
  margin: 26px 0 12px;
}

.content-box p {
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.content-box ul, .content-box ol {
  padding-left: 24px;
  margin-bottom: 22px;
}

.content-box li {
  margin-bottom: 9px;
  font-size: 0.96rem;
}

.alert-box {
  background: var(--bg-tag-coral);
  border-left: 4px solid var(--coral-primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-size: 0.94rem;
  color: var(--text-primary);
}

/* 资讯列表网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 32px;
}

.article-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--coral-primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-category {
  color: var(--coral-primary);
  font-weight: 700;
  background: var(--bg-tag-coral);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

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

.article-snippet {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--azure-accent);
}

.article-read-link:hover {
  color: var(--coral-primary);
}

/* --------------------------------------------------------------------------
   16. SEO 深度长篇科普文章专属样式体系 (Long-form Technical SEO Articles)
   -------------------------------------------------------------------------- */
.article-page-wrap {
  padding: 60px 0 90px;
  position: relative;
  z-index: 2;
}

.article-header {
  margin-bottom: 40px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 30px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

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

.article-breadcrumb a:hover {
  color: var(--coral-primary);
}

.article-main-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.28;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.025em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

.article-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-secondary);
  background: var(--bg-surface-elevated);
  border-left: 4px solid var(--coral-primary);
  padding: 22px 26px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 36px;
}

/* 目录 (Table of Contents - TOC) */
.article-toc {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-sm);
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.article-toc-item a {
  font-size: 0.95rem;
  font-weight: 550;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

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

.article-toc-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--azure-accent);
  background: var(--bg-tag-azure);
  padding: 1px 7px;
  border-radius: 4px;
}

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

.article-body h2 {
  font-size: 1.8rem;
  font-weight: 850;
  color: var(--text-primary);
  margin: 54px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 34px 0 16px;
  letter-spacing: -0.01em;
}

.article-body p {
  margin-bottom: 22px;
}

.article-body ul, .article-body ol {
  padding-left: 26px;
  margin-bottom: 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* 数据对比表格 */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--bg-surface-elevated);
}

.article-table th {
  background: rgba(14, 165, 233, 0.08);
  color: var(--text-primary);
  padding: 14px 18px;
  font-weight: 750;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

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

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

.article-table tr:hover td {
  background: rgba(255, 107, 91, 0.04);
}

/* 文章专属 FAQ 板块 */
.article-faq-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.article-faq-title {
  font-size: 1.7rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 24px;
}

/* 相关阅读板块 (Related Posts) */
.article-related-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.article-related-title {
  font-size: 1.6rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 24px;
}

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

.article-related-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

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

.article-related-card-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.article-related-card:hover .article-related-card-title {
  color: var(--coral-primary);
}

.article-related-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* 文末高转化引流卡片 */
.article-cta-box {
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.12) 0%, rgba(14, 165, 233, 0.12) 100%);
  border: 1px solid rgba(255, 107, 91, 0.35);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  text-align: center;
  margin: 54px 0 36px;
}

.article-cta-title {
  font-size: 1.7rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-cta-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 26px;
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.9rem;
  }
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card-popular {
    transform: none;
  }
  .pricing-card-popular:hover {
    transform: translateY(-8px);
  }
  .service-badges-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 68px 0;
  }
  .container {
    padding: 0 18px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    padding: 26px 22px;
    flex-direction: column;
    gap: 18px;
    box-shadow: var(--shadow-xl);
  }
  .nav-links.is-open {
    display: flex;
  }
  .mobile-menu-toggle {
    display: flex;
  }
  .lang-toggle {
    display: none;
  }
  .header .btn-coral {
    display: none;
  }
  .hero-section {
    padding: 50px 0 44px;
  }
  .hero-title {
    font-size: 2.2rem;
    line-height: 1.25;
  }
  .hero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 30px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 16px;
  }
  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 16px;
  }
  .metric-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .features-grid,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid,
  .article-related-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .article-main-title {
    font-size: 1.9rem;
    line-height: 1.3;
  }
  .service-badges-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .content-box {
    padding: 30px 22px;
  }
  .footer-links {
    gap: 18px;
  }
  .btn-lg {
    padding: 14px 24px;
    width: 100%;
  }
  .cta-banner {
    padding: 44px 24px;
  }
  .cta-banner-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .price-amount {
    font-size: 2.7rem;
  }
}