/* ===================================================================
   WgetCloud - Photonic Mesh-Tapestry UI
   Deep Telecommunication Cosmos · Woven Optical Fiber Topology
   原生纯净 · 极速秒开 · 昼夜自适应平滑过渡 · 响应式单栏与大触控
   =================================================================== */

:root {
  /* 默认白天模式 (Light Mode) */
  --bg-cosmos: #f8fafc;
  --bg-surface: rgba(255, 255, 255, 0.88);
  --bg-surface-elevated: rgba(241, 245, 249, 0.92);
  --bg-nav: rgba(255, 255, 255, 0.82);
  --bg-glass-card: rgba(255, 255, 255, 0.75);
  --bg-tag: rgba(37, 99, 235, 0.08);

  --border-glass: rgba(226, 232, 240, 0.85);
  --border-glow: rgba(37, 99, 235, 0.25);
  --border-focus: #2563eb;

  --text-main: #0a0f1d;
  --text-muted: #334155;
  --text-sub: #64748b;
  --text-inverse: #ffffff;

  /* 核心光学色彩 (Deep Telecommunication Cosmos) */
  --laser-cobalt: #2563eb;
  --laser-cobalt-hover: #1d4ed8;
  --optical-cyan: #0284c7;
  --optical-cyan-glow: rgba(2, 132, 199, 0.2);
  --filament-gradient: linear-gradient(135deg, #2563eb 0%, #0284c7 50%, #06b6d4 100%);
  --edge-bleed-glow: 0 0 24px rgba(37, 99, 235, 0.12);

  --badge-live-bg: rgba(16, 185, 129, 0.1);
  --badge-live-text: #059669;
  --badge-live-border: rgba(16, 185, 129, 0.3);

  --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 20px 40px -10px rgba(37, 99, 235, 0.15);
  --nav-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);

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

  --transition-theme: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                      color 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                      border-color 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                      box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* 深色模式：Photonic Mesh-Tapestry Cosmos (#06080d) */
[data-theme="dark"] {
  --bg-cosmos: #06080d;
  --bg-surface: rgba(11, 16, 26, 0.82);
  --bg-surface-elevated: rgba(17, 24, 39, 0.88);
  --bg-nav: rgba(6, 8, 13, 0.82);
  --bg-glass-card: rgba(11, 16, 26, 0.65);
  --bg-tag: rgba(56, 189, 248, 0.12);

  --border-glass: rgba(56, 189, 248, 0.15);
  --border-glow: rgba(56, 189, 248, 0.35);
  --border-focus: #38bdf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  --text-inverse: #06080d;

  --laser-cobalt: #3b82f6;
  --laser-cobalt-hover: #60a5fa;
  --optical-cyan: #38bdf8;
  --optical-cyan-glow: rgba(56, 189, 248, 0.35);
  --filament-gradient: linear-gradient(135deg, #2563eb 0%, #38bdf8 60%, #a5f3fc 100%);
  --edge-bleed-glow: 0 0 30px rgba(56, 189, 248, 0.18), inset 0 1px 1px 0 rgba(56, 189, 248, 0.25);

  --badge-live-bg: rgba(16, 185, 129, 0.14);
  --badge-live-text: #34d399;
  --badge-live-border: rgba(16, 185, 129, 0.35);

  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --card-shadow-hover: 0 24px 50px -12px rgba(37, 99, 235, 0.35), 0 0 25px rgba(56, 189, 248, 0.2);
  --nav-shadow: 0 4px 25px rgba(0, 0, 0, 0.65);
}

/* 基础重置与平滑滚动 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

body {
  background-color: var(--bg-cosmos);
  color: var(--text-main);
  transition: var(--transition-theme);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 3D 数学光纤编织动态画布 Background Canvas */
.photonic-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

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

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

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

/* ===================================================================
   烟熏玻璃容器体系 (Smoked-Glass Modular Containers)
   =================================================================== */
.glass-container {
  background: var(--bg-glass-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--card-shadow), var(--edge-bleed-glow);
  transition: var(--transition-smooth);
  position: relative;
}

.glass-container:hover {
  border-color: var(--border-glow);
  box-shadow: var(--card-shadow-hover);
}

/* ===================================================================
   页眉 Header 与全板块导航目录
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--nav-shadow);
  transition: var(--transition-theme);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.logo-beacon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--filament-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 0 16px var(--optical-cyan-glow);
  position: relative;
}

.logo-beacon::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  border: 1px solid var(--optical-cyan);
  opacity: 0.5;
  animation: pulse-ring 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 0.1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.brand-text span {
  color: var(--optical-cyan);
}

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

.nav-link-item {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 4px;
  transition: var(--transition-smooth);
}

.nav-link-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  background: var(--filament-gradient);
  transition: transform 0.25s ease;
  border-radius: 2px;
}

.nav-link-item:hover,
.nav-link-item.active {
  color: var(--text-main);
}

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

/* 推荐资讯高亮徽标 */
.nav-badge-hot {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-tag);
  border: 1px solid var(--border-glow);
  color: var(--optical-cyan) !important;
  font-weight: 600;
  font-size: 0.85rem;
}

.nav-badge-hot:hover {
  background: var(--filament-gradient);
  color: #ffffff !important;
  border-color: transparent;
  box-shadow: 0 0 14px var(--optical-cyan-glow);
}

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

/* 精致专业化透明昼夜模式切换按钮 */
.theme-toggle-btn {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass);
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: var(--transition-smooth);
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.theme-toggle-btn:hover {
  border-color: var(--optical-cyan);
  background: var(--bg-surface-elevated);
  box-shadow: 0 0 14px var(--optical-cyan-glow);
  transform: translateY(-1px);
}

.theme-icon {
  position: absolute;
  width: 18px;
  height: 18px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

[data-theme="light"] .theme-icon.moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
[data-theme="light"] .theme-icon.sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.3);
}

[data-theme="dark"] .theme-icon.moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.3);
}
[data-theme="dark"] .theme-icon.sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-glass);
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

/* ===================================================================
   CTA 呼吁性统一按钮规范 (严格要求 nofollow + target=_blank)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 12px 24px;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-smooth);
  white-space: nowrap;
  text-align: center;
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px var(--optical-cyan-glow), 0 0 16px rgba(56, 189, 248, 0.4);
}

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

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--optical-cyan);
  color: var(--optical-cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   主视觉区 (Hero Section) - 包含当前品牌名大标题 + 简介
   =================================================================== */
.hero-section {
  position: relative;
  padding: 90px 0 70px;
  overflow: hidden;
}

.hero-ambient-cosmos {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(circle, var(--optical-cyan-glow) 0%, rgba(37, 99, 235, 0.08) 50%, rgba(6, 8, 13, 0) 80%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: var(--badge-live-bg);
  color: var(--badge-live-text);
  border: 1px solid var(--badge-live-border);
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 26px;
  backdrop-filter: blur(8px);
}

.pulse-filament-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
  box-shadow: 0 0 10px currentColor;
  animation: live-pulse 2s infinite;
}

@keyframes live-pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 14px currentColor; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

/* 核心大标题：包含品牌名 WgetCloud */
.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-main);
}

.hero-title .brand-highlight {
  background: var(--filament-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
}

.hero-subtitle {
  font-size: 1.18rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 38px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* 核心指标微交互面板 */
.hero-stats-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  max-width: 960px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
  padding: 8px 12px;
  border-right: 1px solid var(--border-glass);
}

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

.stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--laser-cobalt);
  line-height: 1.2;
}

[data-theme="dark"] .stat-num {
  color: var(--optical-cyan);
  text-shadow: 0 0 20px var(--optical-cyan-glow);
}

.stat-label {
  font-size: 0.84rem;
  color: var(--text-sub);
  margin-top: 4px;
}

/* 多数据中心集群光子互联探测模拟器 */
.cluster-telemetry-box {
  margin-top: 36px;
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 16px;
}

.telemetry-node {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.telemetry-node:hover {
  color: var(--text-main);
  transform: translateY(-2px);
}

.beacon-flare {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
}

.telemetry-latency {
  background: var(--bg-tag);
  color: var(--laser-cobalt);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
}

[data-theme="dark"] .telemetry-latency {
  color: var(--optical-cyan);
}

/* ===================================================================
   板块通用框架 (Section Framework)
   =================================================================== */
.section-padding {
  padding: 85px 0;
  position: relative;
  z-index: 1;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--laser-cobalt);
  background: var(--bg-tag);
  border: 1px solid var(--border-glass);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

[data-theme="dark"] .section-tag {
  color: var(--optical-cyan);
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}

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

/* ===================================================================
   产品核心优势介绍 (3个图文卡片)
   =================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  transform: translateY(-6px);
}

.card-icon-beacon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--bg-tag);
  border: 1px solid var(--border-glass);
  color: var(--laser-cobalt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] .card-icon-beacon {
  color: var(--optical-cyan);
  box-shadow: 0 0 16px var(--optical-cyan-glow);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.card-feature-list {
  list-style: none;
  border-top: 1px solid var(--border-glass);
  padding-top: 18px;
}

.card-feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.check-icon {
  color: #10b981;
  flex-shrink: 0;
}

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

.media-ai-card {
  border-radius: var(--radius-lg);
  padding: 40px 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.media-ai-card:hover {
  transform: translateY(-5px);
}

.card-badge-top {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.badge-stream {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.28);
}

.badge-ai {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.28);
}

.chips-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 24px;
}

.media-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.media-chip:hover {
  border-color: var(--optical-cyan);
  transform: translateY(-1px);
}

.media-chip svg {
  width: 16px;
  height: 16px;
}

.card-highlight-box {
  background: var(--bg-tag);
  border-left: 3px solid var(--laser-cobalt);
  padding: 16px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: auto;
}

[data-theme="dark"] .card-highlight-box {
  border-left-color: var(--optical-cyan);
}

/* ===================================================================
   套餐价格对比表 (参考 WgetCloud 官方真实季度/年度价格)
   =================================================================== */
.pricing-cycle-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: -20px auto 44px;
  padding: 5px 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  width: fit-content;
  max-width: 95%;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.cycle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-smooth);
  white-space: nowrap;
  user-select: none;
}

.cycle-btn.active {
  background: var(--filament-gradient);
  color: #ffffff;
  box-shadow: 0 2px 10px var(--optical-cyan-glow);
}

.cycle-discount-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.74rem;
  font-weight: 700;
  background: #10b981;
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1.2;
}

@media (max-width: 480px) {
  .pricing-cycle-switcher {
    gap: 4px;
    padding: 4px;
  }
  .cycle-btn {
    padding: 8px 12px;
    font-size: 0.85rem;
  }
  .cycle-discount-pill {
    font-size: 0.68rem;
    padding: 1px 5px;
  }
}


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

.pricing-card {
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--laser-cobalt);
  box-shadow: 0 12px 40px var(--optical-cyan-glow);
  transform: scale(1.02);
}

[data-theme="dark"] .pricing-card.featured {
  border-color: var(--optical-cyan);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--filament-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px var(--optical-cyan-glow);
  white-space: nowrap;
}

.pricing-header {
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 24px;
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 900;
  margin-bottom: 6px;
  color: var(--text-main);
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 18px;
}

.price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--laser-cobalt);
}

[data-theme="dark"] .price-currency {
  color: var(--optical-cyan);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

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

.price-effective {
  font-size: 0.8rem;
  color: #10b981;
  font-weight: 600;
  margin-top: 6px;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.45;
}

.plan-features li strong {
  color: var(--text-main);
}

/* ===================================================================
   用户评价 (User Reviews)
   =================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
}

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

.review-stars {
  color: #f59e0b;
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--filament-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: 0 0 12px var(--optical-cyan-glow);
}

.author-info h4 {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
}

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

[data-theme="dark"] .faq-icon {
  color: var(--optical-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: var(--bg-surface-elevated);
}

.faq-answer-inner {
  padding: 0 26px 22px 26px;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-muted);
}

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

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

/* ===================================================================
   底部行动号召 CTA Banner
   =================================================================== */
.final-cta-section {
  padding: 60px 0 85px;
}

.final-cta-box {
  background: var(--filament-gradient);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  box-shadow: 0 18px 45px var(--optical-cyan-glow);
  position: relative;
  overflow: hidden;
}

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

.final-cta-box p {
  font-size: 1.12rem;
  opacity: 0.92;
  max-width: 680px;
  margin: 0 auto 34px;
}

.btn-white {
  background: #ffffff;
  color: #1e3a8a !important;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-white:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

/* ===================================================================
   页脚 Footer (严格遵循：只保留这四个标题，内容打开新页面)
   =================================================================== */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-glass);
  padding: 42px 0 32px;
  transition: var(--transition-theme);
  position: relative;
  z-index: 1;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 12px;
}

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

[data-theme="dark"] .footer-link:hover {
  color: var(--optical-cyan);
}

.footer-copy {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-sub);
  border-top: 1px solid var(--border-glass);
  padding-top: 22px;
}

/* ===================================================================
   独立二级页面通用样式 (about, terms, privacy, sitemap, pulse-insights)
   =================================================================== */
.page-container {
  max-width: 880px;
  margin: 40px auto 85px;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.doc-card {
  border-radius: var(--radius-lg);
  padding: 48px;
}

.doc-header {
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.doc-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 10px;
}

.doc-meta {
  font-size: 0.86rem;
  color: var(--text-sub);
}

.doc-section {
  margin-bottom: 38px;
}

.doc-section h2 {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-section p {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 14px;
}

.doc-section ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.doc-section li {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.highlight-notice {
  background: var(--bg-tag);
  border-left: 4px solid var(--laser-cobalt);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 0.95rem;
  color: var(--text-main);
}

[data-theme="dark"] .highlight-notice {
  border-left-color: var(--optical-cyan);
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--laser-cobalt);
  font-weight: 600;
  margin-bottom: 24px;
}

[data-theme="dark"] .back-home-link {
  color: var(--optical-cyan);
}

.back-home-link:hover {
  text-decoration: underline;
}

/* 资讯列表卡片 */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 24px;
}

.insight-item {
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition-smooth);
}

.insight-item:hover {
  transform: translateY(-3px);
}

.insight-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.insight-tag {
  background: var(--bg-tag);
  color: var(--laser-cobalt);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

[data-theme="dark"] .insight-tag {
  color: var(--optical-cyan);
}

.insight-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.insight-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===================================================================
   响应式媒体查询 (手机端完美单栏与大触控区域)
   =================================================================== */
@media (max-width: 1024px) {
  .advantages-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    box-shadow: var(--card-shadow);
    gap: 16px;
  }

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

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

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-stats-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .advantages-grid,
  .media-ai-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .doc-card {
    padding: 24px 18px;
  }

  .doc-title {
    font-size: 1.7rem;
  }
}

/* ===================================================================
   深度 SEO 长文专区样式体系 (Article, TOC, FAQ, Related)
   =================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-sub);
}

.breadcrumbs a:hover {
  color: var(--laser-cobalt);
}

[data-theme="dark"] .breadcrumbs a:hover {
  color: var(--optical-cyan);
}

.breadcrumbs span.separator {
  color: var(--border-glass);
}

.article-hero {
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 28px;
  margin-bottom: 34px;
}

.article-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-sub);
  flex-wrap: wrap;
}

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

/* 核心要点速览 TL;DR */
.tldr-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glass);
  border-left: 4px solid var(--laser-cobalt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 22px 24px;
  margin-bottom: 36px;
}

[data-theme="dark"] .tldr-box {
  border-left-color: var(--optical-cyan);
}

.tldr-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tldr-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tldr-box li {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
  position: relative;
  padding-left: 20px;
  margin-bottom: 6px;
}

.tldr-box li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: var(--laser-cobalt);
  font-weight: bold;
}

[data-theme="dark"] .tldr-box li::before {
  color: var(--optical-cyan);
}

/* 文章目录 Table of Contents */
.article-toc {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
  backdrop-filter: blur(12px);
}

.toc-header {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc-counter;
}

.toc-item {
  margin-bottom: 10px;
}

.toc-item a {
  font-size: 0.94rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.toc-item a::before {
  counter-increment: toc-counter;
  content: counter(toc-counter) ".";
  font-weight: 700;
  color: var(--laser-cobalt);
  min-width: 18px;
}

[data-theme="dark"] .toc-item a::before {
  color: var(--optical-cyan);
}

.toc-item a:hover {
  color: var(--laser-cobalt);
  transform: translateX(4px);
}

[data-theme="dark"] .toc-item a:hover {
  color: var(--optical-cyan);
}

/* 正文排版 */
.article-body {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glass);
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 30px 0 14px;
}

.article-body p {
  margin-bottom: 18px;
}

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

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

.article-body li {
  margin-bottom: 10px;
  line-height: 1.8;
}

/* 正文内链高亮 */
.article-body a.in-text-link {
  color: var(--laser-cobalt);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

[data-theme="dark"] .article-body a.in-text-link {
  color: var(--optical-cyan);
}

.article-body a.in-text-link:hover {
  opacity: 0.85;
}

/* 比较表格 Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
}

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

.article-table th {
  background: var(--bg-surface-elevated);
  padding: 14px 18px;
  font-weight: 700;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-glass);
  white-space: nowrap;
}

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

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

.article-table tr:hover td {
  background: var(--bg-tag);
}

/* 文章专属 FAQ 区块 */
.article-faq-section {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid var(--border-glass);
}

.article-faq-section h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 24px;
}

/* 文章末尾相关阅读 Related Reading */
.related-reading-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-glass);
}

.related-reading-section h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 22px;
}

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

.related-card {
  border-radius: var(--radius-md);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.related-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.45;
}

.related-card p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-link {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--laser-cobalt);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

[data-theme="dark"] .related-link {
  color: var(--optical-cyan);
}

@media (max-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-title {
    font-size: 1.7rem;
  }
}