/* ==========================================================================
   dove加速器 - 官方奢华平流层层流空气动力学样式表 (Luxury Laminar-Airflow UI)
   品牌名: dove加速器
   官方域名: https://dovejiasu.homes
   UI设计语言:
   - Stratospheric laminar-airflow & biomimetic-winglet luxury daylight UI
   - Palette: Pure sky-dome white (#f8fafc), silver-mist airflow lines (#cbd5e1),
              crisp aerodynamic azure (#0284c7), dense midnight-ink (#0f172a)
   - Zero generic AI bot or cartoonish bird icons. High precision aerospace aesthetics.
   - Coandă-effect smooth micro-interactions & frictionless inertia.
   ========================================================================== */

/* --- 核心色彩与层流设计变量 --- */
:root {
  /* 空气动力学主色谱 */
  --aero-azure: #0284c7;
  --aero-azure-hover: #0369a1;
  --aero-cyan: #0ea5e9;
  --aero-sky: #38bdf8;
  --aero-glow: rgba(2, 132, 199, 0.22);
  --aero-gradient: linear-gradient(135deg, #0284c7 0%, #0ea5e9 45%, #38bdf8 100%);
  --winglet-accent: linear-gradient(90deg, #0284c7, #38bdf8);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* 白天模式 (默认高空平流层昼光) */
  --bg-page: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: #ffffff;
  --bg-card-solid: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --bg-nav: rgba(248, 250, 252, 0.82);
  
  --streamline-color: rgba(203, 213, 225, 0.45);
  --streamline-active: rgba(2, 132, 199, 0.35);

  --text-main: #0f172a;       /* 浓郁深夜墨黑 */
  --text-muted: #475569;      /* 灰云中性色 */
  --text-subtle: #94a3b8;     /* 浅银雾 */
  --text-inverse: #ffffff;

  --border-light: rgba(226, 232, 240, 0.85);
  --border-subtle: #cbd5e1;   /* 银雾流线边框 */
  --border-card: rgba(203, 213, 225, 0.55);

  --shadow-airfoil: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --shadow-hover: 0 16px 36px -6px rgba(2, 132, 199, 0.12), 0 6px 16px -4px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 35px rgba(2, 132, 199, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;          /* 仿生翼尖小翼大圆角 */
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-air: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.18s ease;
}

/* 夜间模式 (平流层深空暗夜) */
[data-theme="dark"] {
  --bg-page: #060913;
  --bg-card: rgba(13, 19, 36, 0.78);
  --bg-card-hover: rgba(18, 26, 48, 0.95);
  --bg-card-solid: #0d1324;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-nav: rgba(6, 9, 19, 0.85);

  --streamline-color: rgba(30, 41, 59, 0.6);
  --streamline-active: rgba(56, 189, 248, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #070b14;

  --border-light: rgba(30, 41, 59, 0.7);
  --border-subtle: #334155;
  --border-card: rgba(51, 65, 85, 0.55);

  --shadow-airfoil: 0 4px 20px -2px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 16px 40px -6px rgba(2, 132, 199, 0.28), 0 0 30px rgba(14, 165, 233, 0.15);
  --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.3);
}

/* --- 重置与基础布局 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  transition: background-color var(--transition-air), color var(--transition-air);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 全屏层流风洞流线背景画布 (Coandă Effect) */
#laminar-flow-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

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

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

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

.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* --- 顶部层流导航栏 (Laminar Navbar) --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition-air), border-color var(--transition-air);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
  flex-shrink: 0;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.38);
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 900;
}

.brand-name-highlight {
  background: var(--aero-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 导航目录 (包含首页、各板块锚点与推荐资讯) */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 8px 6px;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--aero-azure);
}

/* 仿生翼片导流高亮横线 */
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--winglet-accent);
  transition: all var(--transition-air);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 80%;
}

/* 特别高亮：推荐资讯标签 */
.nav-badge-pill {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.12);
  color: var(--aero-azure);
  margin-left: 4px;
  vertical-align: middle;
  font-weight: 700;
  white-space: nowrap;
}

[data-theme="dark"] .nav-badge-pill {
  background: rgba(56, 189, 248, 0.18);
  color: var(--aero-sky);
}

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

/* 昼夜模式切换按钮: 奢华平流层胶囊造型 */
.theme-toggle-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-airfoil);
  transition: all var(--transition-air);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  border-color: var(--aero-azure);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  color: var(--aero-azure);
}

.theme-icon-sun, .theme-icon-moon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-air), opacity var(--transition-air);
}

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

.mobile-toggle-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  background: var(--bg-card);
}

/* --- 空气动力学按钮系统 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  font-size: 0.98rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all var(--transition-air);
  text-align: center;
  white-space: nowrap;
  line-height: 1;
  min-height: 48px;
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--aero-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 18px var(--aero-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(2, 132, 199, 0.45);
}

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

.btn-secondary:hover {
  border-color: var(--aero-azure);
  color: var(--aero-azure);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.88rem;
  min-height: 40px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* --- 徽章与遥测指示 --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
  word-break: keep-all;
}

.badge-aero {
  background: rgba(2, 132, 199, 0.08);
  color: var(--aero-azure);
  border: 1px solid rgba(2, 132, 199, 0.28);
  backdrop-filter: blur(8px);
}

[data-theme="dark"] .badge-aero {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--aero-sky);
}

.badge-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 10px var(--success);
  animation: aeroPulse 2.2s infinite;
}

@keyframes aeroPulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* --- 通用板块排版 --- */
.section {
  padding: 96px 0;
  position: relative;
  z-index: 1;
}

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

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px auto;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.6px;
  margin-bottom: 16px;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- 主视觉区 (Hero Section) --- */
.hero-section {
  padding: 85px 0 100px 0;
  position: relative;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 520px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.16) 0%, rgba(14, 165, 233, 0.05) 50%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] .hero-bg-glow {
  background: radial-gradient(circle, rgba(14, 165, 233, 0.25) 0%, rgba(2, 132, 199, 0.08) 60%, transparent 80%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-badge-wrap {
  margin-bottom: 26px;
}

/* 大标题包含“当前品牌名” */
.hero-title {
  font-size: clamp(2.5rem, 5.2vw, 3.8rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1.2px;
  margin-bottom: 24px;
}

/* 详细简介 (Hero Intro / Subtitle) */
.hero-subtitle {
  font-size: clamp(1.1rem, 2.1vw, 1.28rem);
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 820px;
  margin: 0 auto 40px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 54px;
  flex-wrap: wrap;
}

/* 遥测数据 HUD 仪表板 (Airfoil Telemetry Bar) */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 26px 28px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-airfoil);
  margin-top: 40px;
  text-align: left;
}

.stat-item {
  display: flex;
  flex-direction: column;
  padding: 8px 18px;
  border-right: 1px solid var(--border-light);
}

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

.stat-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--aero-azure);
  line-height: 1.15;
  font-feature-settings: "tnum";
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 600;
}

/* 实时层流专线节点状态卡片 (Borderless Floating Airfoil) */
.speed-preview-card {
  margin-top: 50px;
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-airfoil);
  padding: 26px;
  text-align: left;
}

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

.preview-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 700;
}

.preview-indicator {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 600;
}

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

.node-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-air);
}

.node-item:hover {
  transform: translateY(-3px);
  border-color: var(--aero-azure);
  box-shadow: var(--shadow-airfoil);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-name {
  font-size: 0.92rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.node-ping {
  font-size: 0.86rem;
  font-weight: 800;
  color: var(--success);
  font-feature-settings: "tnum";
}

.node-protocol {
  font-size: 0.78rem;
  color: var(--text-subtle);
}

/* --- 产品核心优势 (3个图文卡片 - 仿生翼片微交互) --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-airfoil);
  transition: transform var(--transition-air), box-shadow var(--transition-air), border-color var(--transition-air);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 翼尖小翼空气动力倾斜微交互 (Coandă Pitch-and-Lift) */
.feature-card:hover {
  transform: translateY(-8px) perspective(900px) rotateX(1.8deg);
  box-shadow: var(--shadow-hover);
  border-color: var(--aero-azure);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--aero-gradient);
  opacity: 0;
  transition: opacity var(--transition-air);
}

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

.feature-icon-box {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(2, 132, 199, 0.09);
  color: var(--aero-azure);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  transition: all var(--transition-air);
}

.feature-card:hover .feature-icon-box {
  background: var(--aero-gradient);
  color: #ffffff;
  transform: scale(1.06);
}

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

.feature-title {
  font-size: 1.38rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

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

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

.feature-point-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.check-icon-svg {
  width: 17px;
  height: 17px;
  color: var(--aero-azure);
  flex-shrink: 0;
}

/* --- 流媒体图卡 (Streaming Card Showcase) --- */
.media-showcase-wrap {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-airfoil);
}

.showcase-info h2,
.showcase-info h3 {
  font-size: 1.95rem;
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.3;
}

.showcase-info p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 26px;
}

.streaming-services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-badge-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  text-align: center;
  transition: all var(--transition-air);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.service-badge-card:hover {
  transform: translateY(-4px);
  border-color: var(--aero-azure);
  box-shadow: var(--shadow-airfoil);
}

.service-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.15rem;
}

.service-name {
  font-size: 0.92rem;
  font-weight: 700;
}

.service-tag {
  font-size: 0.74rem;
  color: var(--text-subtle);
  background: var(--bg-card);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* --- AI 支持图卡 (AI Showcase) --- */
.ai-showcase-wrap {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 48px;
  align-items: center;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-airfoil);
}

.ai-cards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-card-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px 22px;
  transition: all var(--transition-air);
}

.ai-card-item:hover {
  border-color: var(--aero-azure);
  transform: translateX(6px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-airfoil);
}

.ai-card-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.ai-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--aero-azure);
  box-shadow: var(--shadow-airfoil);
}

.ai-title {
  font-size: 0.98rem;
  font-weight: 700;
}

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

.ai-status-pill {
  font-size: 0.76rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.12);
  color: var(--success);
  font-weight: 700;
}

/* --- 套餐价格表 (参考真实机场/专线网络定价) --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 42px 34px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-air), box-shadow var(--transition-air), border-color var(--transition-air);
  position: relative;
  box-shadow: var(--shadow-airfoil);
}

.pricing-card:hover {
  transform: translateY(-8px) perspective(900px) rotateX(1.8deg);
  box-shadow: var(--shadow-hover);
}

/* 热门主力套餐 */
.pricing-card.featured {
  border: 2px solid var(--aero-azure);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.pricing-badge-popular {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--aero-gradient);
  color: #ffffff;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--aero-glow);
  white-space: nowrap !important;
  word-break: keep-all !important;
  width: max-content;
  max-width: 90%;
  text-align: center;
  z-index: 2;
}

.pricing-header {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 26px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 44px;
}

.plan-price-wrap {
  margin: 20px 0 10px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--aero-azure);
}

.price-num {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  font-feature-settings: "tnum";
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-subtle);
  font-weight: 500;
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  font-size: 0.94rem;
  color: var(--text-muted);
}

.plan-feature-item strong {
  color: var(--text-main);
}

/* 价格对比矩阵表 */
.comparison-wrap {
  margin-top: 65px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-airfoil);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: center;
  min-width: 680px;
}

.comparison-table th, .comparison-table td {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.94rem;
}

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

.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-main);
}

/* --- 用户评价 (Testimonials) --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-airfoil);
  transition: all var(--transition-air);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--aero-azure);
}

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

.testimonial-comment {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

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

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

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.94rem;
  font-weight: 700;
}

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

/* --- 常见问题解答 (FAQ 手风琴) --- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-air);
  box-shadow: var(--shadow-airfoil);
}

.faq-item.active {
  border-color: var(--aero-azure);
  box-shadow: var(--shadow-hover);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: left;
  gap: 16px;
}

.faq-icon-arrow {
  width: 22px;
  height: 22px;
  transition: transform var(--transition-air);
  color: var(--aero-azure);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding-bottom: 24px;
}

/* --- 底部通用 CTA 横幅 --- */
.bottom-cta-banner {
  background: var(--aero-gradient);
  border-radius: var(--radius-lg);
  padding: 60px 44px;
  text-align: center;
  color: #ffffff;
  margin-top: 65px;
  box-shadow: 0 12px 35px var(--aero-glow);
  position: relative;
  overflow: hidden;
}

.bottom-cta-banner h2 {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.bottom-cta-banner p {
  font-size: 1.12rem;
  opacity: 0.92;
  max-width: 680px;
  margin: 0 auto 32px auto;
}

.btn-white {
  background: #ffffff;
  color: #0369a1 !important;
  font-weight: 800;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

/* --- 资讯卡片网格样式 (用于推荐资讯页面) --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.news-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-air);
  box-shadow: var(--shadow-airfoil);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--aero-azure);
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 0.84rem;
  color: var(--text-subtle);
}

.news-category {
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.1);
  color: var(--aero-azure);
  font-weight: 700;
  font-size: 0.78rem;
}

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

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

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

/* --- 页脚 (Footer): 严格只保留四个标题 --- */
.site-footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-light);
  padding: 55px 0 38px 0;
  margin-top: auto;
  transition: background-color var(--transition-air);
  position: relative;
  z-index: 1;
}

.footer-nav-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--aero-azure);
  background: var(--bg-secondary);
}

.footer-copyright {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-subtle);
  border-top: 1px solid var(--border-light);
  padding-top: 26px;
}

/* --- 独立子页面通用样式 --- */
.page-header {
  padding: 65px 0 40px 0;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.page-title {
  font-size: 2.45rem;
  font-weight: 900;
  margin-bottom: 14px;
}

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

.page-content-wrap {
  padding: 55px 0 85px 0;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px 54px;
  box-shadow: var(--shadow-airfoil);
}

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

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

.article-heading {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 12px;
}

.article-heading-icon {
  width: 26px;
  height: 26px;
  color: var(--aero-azure);
}

.article-text {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-list {
  list-style: disc;
  padding-left: 26px;
  margin-bottom: 18px;
  color: var(--text-muted);
  line-height: 1.8;
}

.article-callout {
  background: var(--bg-secondary);
  border-left: 4px solid var(--aero-azure);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 18px 22px;
  margin: 22px 0;
  color: var(--text-main);
  font-size: 0.98rem;
  line-height: 1.75;
}

.article-callout.warning {
  border-left-color: var(--danger);
  background: rgba(239, 68, 68, 0.08);
}

/* --- 响应式适配媒体查询 (@media) --- */
@media (max-width: 1024px) {
  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
  .stat-item:nth-child(3) {
    border-top: 1px solid var(--border-light);
    padding-top: 16px;
  }
  .stat-item:nth-child(4) {
    border-top: 1px solid var(--border-light);
    padding-top: 16px;
    border-right: none;
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .news-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .media-showcase-wrap, .ai-showcase-wrap {
    grid-template-columns: 1fr;
    padding: 34px 26px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 65px 0;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .hero-section {
    padding: 45px 0 65px 0;
  }
  .hero-title {
    font-size: 2.15rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .mobile-toggle-btn {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-card-solid);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);
    display: none;
  }
  .nav-menu.show {
    display: flex;
  }
  .nav-link {
    padding: 12px 0;
    font-size: 1.05rem;
  }

  .hero-stats-bar {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding: 14px 0;
  }
  .stat-item:last-child {
    border-bottom: none;
  }
  .nodes-grid {
    grid-template-columns: 1fr;
  }

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

  .article-card {
    padding: 30px 22px;
  }
  
  .footer-nav-container {
    flex-direction: column;
    gap: 16px;
  }

  .bottom-cta-banner {
    padding: 40px 24px;
  }
  .bottom-cta-banner h2 {
    font-size: 1.75rem;
  }
}