/* ==========================================================================
   红杏云 (HongXing Cloud) - 原生设计系统样式表
   风格: Airy Minimalist Light Mode, Soft Coral-Pink & Sky-Blue Ambient Glow
   设计规范:
   - 画布: 纯白 (#FFFFFF)
   - 文字: 深度石板炭灰 (#0F172A)，副文本 (#475569)
   - 品牌主色: 珊瑚红 (#FF6B5B)
   - 辅助强调色: 晴空蓝 (#0EA5E9)
   - 柔和光晕: 柔粉桃 (#FFF0ED) 与 冰晶蓝 (#EFF8FF) 角部径向弥散
   - 严禁任何通用 AI 闪光/魔法棒/火箭 emoji，全采用纯净技术线框图标
   ========================================================================== */

:root {
  /* 白天模式 (默认) */
  --bg-body: #ffffff;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-surface-card: #ffffff;
  --bg-card-hover: #ffffff;
  
  --border-color: rgba(226, 232, 240, 0.85);
  --border-subtle: #f1f5f9;
  --border-focus: #ff6b5b;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #64748b;
  --text-inverse: #ffffff;

  /* 珊瑚红与晴空蓝色彩系统 */
  --primary-coral: #ff6b5b;
  --primary-coral-hover: #fa5544;
  --primary-coral-light: rgba(255, 107, 91, 0.08);
  --primary-coral-glow: rgba(255, 107, 91, 0.28);

  --secondary-blue: #0ea5e9;
  --secondary-blue-hover: #0284c7;
  --secondary-blue-light: rgba(14, 165, 233, 0.08);
  --secondary-blue-glow: rgba(14, 165, 233, 0.25);

  --ambient-peach: #fff0ed;
  --ambient-iceblue: #eff8ff;

  --gradient-coral-blue: linear-gradient(135deg, #ff6b5b 0%, #38bdf8 100%);
  --gradient-coral-soft: linear-gradient(135deg, #ff6b5b 0%, #ff8e82 100%);
  --gradient-blue-soft: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);

  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 16px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 16px 32px -4px rgba(15, 23, 42, 0.08), 0 6px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-coral: 0 8px 24px -2px rgba(255, 107, 91, 0.35);
  --shadow-blue: 0 8px 24px -2px rgba(14, 165, 233, 0.35);

  --nav-bg: rgba(255, 255, 255, 0.88);
  --nav-border: rgba(226, 232, 240, 0.7);

  --theme-btn-bg: rgba(241, 245, 249, 0.75);
  --theme-btn-border: rgba(203, 213, 225, 0.6);
  --theme-btn-hover: rgba(226, 232, 240, 1);
  --theme-btn-icon: #334155;
}

[data-theme="dark"] {
  /* 专业夜间模式 */
  --bg-body: #0b1120;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-surface-card: rgba(15, 23, 42, 0.85);
  --bg-card-hover: #172339;

  --border-color: rgba(51, 65, 85, 0.55);
  --border-subtle: #1e293b;
  --border-focus: #ff7e70;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #0b1120;

  --primary-coral: #ff7e70;
  --primary-coral-hover: #ff9487;
  --primary-coral-light: rgba(255, 126, 112, 0.16);
  --primary-coral-glow: rgba(255, 126, 112, 0.35);

  --secondary-blue: #38bdf8;
  --secondary-blue-hover: #7dd3fc;
  --secondary-blue-light: rgba(56, 189, 248, 0.16);
  --secondary-blue-glow: rgba(56, 189, 248, 0.32);

  --ambient-peach: rgba(255, 107, 91, 0.12);
  --ambient-iceblue: rgba(14, 165, 233, 0.12);

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 18px 0 rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 36px -4px rgba(0, 0, 0, 0.65);
  --shadow-coral: 0 8px 24px -2px rgba(255, 126, 112, 0.35);
  --shadow-blue: 0 8px 24px -2px rgba(56, 189, 248, 0.35);

  --nav-bg: rgba(11, 17, 32, 0.88);
  --nav-border: rgba(51, 65, 85, 0.5);

  --theme-btn-bg: rgba(30, 41, 59, 0.75);
  --theme-btn-border: rgba(71, 85, 105, 0.5);
  --theme-btn-hover: rgba(51, 65, 85, 0.9);
  --theme-btn-icon: #f8fafc;
}

/* ==========================================================================
   全局重置与柔和背景网格动画
   ========================================================================== */
*, *::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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
  position: relative;
}

/* 柔和呼吸网格渐变背景 */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-blur-coral {
  position: absolute;
  top: -150px;
  right: -100px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--ambient-peach) 0%, rgba(255, 240, 237, 0) 70%);
  filter: blur(80px);
  animation: floatAmbient 16s ease-in-out infinite alternate;
  opacity: 0.9;
}

.ambient-blur-blue {
  position: absolute;
  bottom: 10%;
  left: -120px;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--ambient-iceblue) 0%, rgba(239, 248, 255, 0) 70%);
  filter: blur(80px);
  animation: floatAmbient 18s ease-in-out infinite alternate-reverse;
  opacity: 0.9;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 40px) scale(1.08); }
  100% { transform: translate(40px, -20px) scale(0.96); }
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   吸顶导航栏 Sticky Navbar
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  height: 34px;
  width: auto;
  max-width: 175px;
  display: block;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.logo:hover .logo-img {
  transform: translateY(-1px) scale(1.02);
}

/* 导航链接与滑动的珊瑚红下划线指示器 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  position: relative;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 550;
  color: var(--text-muted);
  position: relative;
  padding: 8px 2px;
  transition: color 0.2s ease;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-coral);
  border-radius: 9999px;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-link-badge {
  font-size: 0.68rem;
  font-weight: 700;
  background: var(--primary-coral-light);
  color: var(--primary-coral);
  padding: 1px 6px;
  border-radius: 9999px;
  margin-left: 4px;
}

/* 右侧交互区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 中文 | EN 语言切换胶囊按钮 */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 9999px;
  background: var(--theme-btn-bg);
  border: 1px solid var(--theme-btn-border);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.lang-switcher:hover {
  border-color: var(--primary-coral);
  color: var(--primary-coral);
  background: var(--bg-surface);
}

.lang-active {
  color: var(--primary-coral);
}

.lang-divider {
  margin: 0 4px;
  opacity: 0.4;
}

/* 昼夜切换按钮 */
.theme-toggle-btn {
  background: var(--theme-btn-bg);
  border: 1px solid var(--theme-btn-border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--theme-btn-icon);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
  outline: none;
}

.theme-toggle-btn:hover {
  background: var(--theme-btn-hover);
  transform: translateY(-1px);
  border-color: var(--primary-coral);
}

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

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-icon-sun { display: none; }
.theme-icon-moon { display: block; }

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

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-main);
}

.menu-toggle svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  stroke-width: 2;
}

/* ==========================================================================
   按钮组件 (CTA Buttons & Tactile Feedback)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  border: 1px solid transparent;
  user-select: none;
}

/* 触觉微交互：点击时缩放按压反馈 */
.btn:active {
  transform: scale(0.96) !important;
}

/* 珊瑚红核心 CTA */
.btn-coral {
  background: var(--primary-coral);
  color: #ffffff !important;
  box-shadow: var(--shadow-coral);
}

.btn-coral:hover {
  background: var(--primary-coral-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -2px rgba(255, 107, 91, 0.45);
}

/* 晴空蓝次级 CTA */
.btn-sky {
  background: var(--secondary-blue);
  color: #ffffff !important;
  box-shadow: var(--shadow-blue);
}

.btn-sky:hover {
  background: var(--secondary-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -2px rgba(14, 165, 233, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--primary-coral);
  color: var(--primary-coral);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 13px 30px;
  font-size: 1.02rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   主视觉区 (Hero Section)
   ========================================================================== */
.hero {
  position: relative;
  padding: 88px 0 64px;
  text-align: center;
  z-index: 1;
}

/* 顶部胶囊标签: 珊瑚红到晴空蓝渐变 + 网络脉冲动效 */
.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(226, 232, 240, 0.9);
  backdrop-filter: blur(8px);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 26px;
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .hero-pill-badge {
  background: rgba(30, 41, 59, 0.7);
  border-color: rgba(51, 65, 85, 0.6);
}

.badge-gradient-tag {
  background: var(--gradient-coral-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.network-pulse-icon {
  width: 16px;
  height: 16px;
  color: var(--primary-coral);
  animation: pulseRotate 3s infinite linear;
}

@keyframes pulseRotate {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  color: var(--text-main);
}

.hero-title .coral-text {
  color: var(--primary-coral);
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 38px;
  line-height: 1.75;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* 3列数据计数器指标条 (Metrics Row) */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
  padding: 26px 36px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -12px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-color);
}

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

.metric-number {
  font-size: 2.2rem;
  font-weight: 850;
  color: var(--primary-coral);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.metric-unit {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-coral);
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   通用的Section头
   ========================================================================== */
.section {
  padding: 88px 0;
  position: relative;
  z-index: 1;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-coral);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 850;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  color: var(--text-main);
}

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

/* ==========================================================================
   产品核心优势 Bento 网格 (为什么选择我们)
   规范: 3列Bento卡片，细致1px边框，柔和悬停浮起，纯净技术线框图标
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.bento-card {
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px 30px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.bento-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-coral);
  box-shadow: var(--shadow-md);
}

.bento-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.bento-icon-box.coral {
  background: var(--primary-coral-light);
  color: var(--primary-coral);
}

.bento-icon-box.blue {
  background: var(--secondary-blue-light);
  color: var(--secondary-blue);
}

.bento-icon-box svg {
  width: 26px;
  height: 26px;
  stroke-width: 2;
}

.bento-title {
  font-size: 1.25rem;
  font-weight: 750;
  margin-bottom: 12px;
  color: var(--text-main);
}

.bento-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.bento-specs {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bento-spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-subtle);
  font-weight: 500;
}

.bento-spec-item svg {
  width: 15px;
  height: 15px;
  color: var(--primary-coral);
  flex-shrink: 0;
}

/* ==========================================================================
   流媒体 & AI 专属图卡
   ========================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  padding: 38px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

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

.showcase-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.tech-icon-circle {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tech-icon-circle.streaming {
  background: var(--primary-coral-light);
  color: var(--primary-coral);
}

.tech-icon-circle.ai {
  background: var(--secondary-blue-light);
  color: var(--secondary-blue);
}

.tech-icon-circle svg {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.showcase-card-title {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--text-main);
}

.showcase-card-subtitle {
  font-size: 0.88rem;
  color: var(--text-subtle);
}

.showcase-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.app-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}

.app-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 10px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-main);
}

.app-pill-status {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tag-item {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--primary-coral-light);
  color: var(--primary-coral);
}

.tech-tag-item.blue {
  background: var(--secondary-blue-light);
  color: var(--secondary-blue);
}

/* ==========================================================================
   套餐价格对比表 (参考真实网上套餐价格)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-coral);
  box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
  border-color: var(--primary-coral);
  box-shadow: 0 12px 30px -4px rgba(255, 107, 91, 0.22);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-coral-soft);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 750;
  padding: 4px 16px;
  border-radius: 9999px;
  box-shadow: 0 4px 12px rgba(255, 107, 91, 0.4);
  white-space: nowrap;
}

.plan-header {
  text-align: center;
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.86rem;
  color: var(--text-subtle);
  min-height: 40px;
}

.plan-price-box {
  margin: 18px 0 24px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-coral);
}

.plan-price {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

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

.plan-features-list {
  margin: 0 0 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.plan-feature-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.plan-feature-row svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.plan-feature-row.enabled svg {
  color: #10b981;
}

.plan-feature-row.disabled {
  opacity: 0.45;
  text-decoration: line-through;
}

.plan-feature-row.disabled svg {
  color: var(--text-subtle);
}

.pricing-footer-tip {
  text-align: center;
  font-size: 0.86rem;
  color: var(--text-subtle);
  margin-top: 36px;
}

/* ==========================================================================
   用户评价 (User Reviews)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-coral);
}

.stars-row {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 14px;
}

.stars-row svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-quote {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

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

.author-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-coral-soft);
  color: #fff;
  font-weight: 750;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.author-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* ==========================================================================
   常见问题 (FAQ) 手风琴
   ========================================================================== */
.faq-box {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-card {
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--bg-surface-card);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-card:hover {
  border-color: var(--primary-coral);
}

.faq-trigger {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 1.02rem;
  font-weight: 650;
  color: var(--text-main);
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.faq-trigger:hover {
  color: var(--primary-coral);
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-subtle);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-card.active .faq-body {
  max-height: 320px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   底部全宽 CTA 横幅
   ========================================================================== */
.bottom-cta-banner {
  background: var(--gradient-coral-soft);
  color: #fff;
  border-radius: 26px;
  padding: 56px 40px;
  text-align: center;
  margin: 40px 0 80px;
  box-shadow: 0 20px 40px -10px rgba(255, 107, 91, 0.45);
  position: relative;
  overflow: hidden;
}

.bottom-cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.bottom-cta-heading {
  font-size: 2.3rem;
  font-weight: 850;
  margin-bottom: 14px;
  color: #ffffff;
}

.bottom-cta-sub {
  font-size: 1.05rem;
  opacity: 0.94;
  max-width: 650px;
  margin: 0 auto 32px;
  color: #ffffff;
}

.btn-white {
  background: #ffffff;
  color: var(--primary-coral) !important;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.btn-white:hover {
  transform: translateY(-2px);
  background: #fdfdfd;
}

/* ==========================================================================
   页脚 (Footer) - 严格只保留四个标题，在新页面打开
   ========================================================================== */
.footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 36px;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.footer-link {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 4px 0;
  transition: color 0.2s ease;
}

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

.footer-divider {
  width: 100%;
  max-width: 800px;
  height: 1px;
  background: var(--border-color);
  margin: 0 auto 24px;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==========================================================================
   子页面内容通用容器 (关于我们, 服务条款, 隐私政策, 网站地图, 推荐资讯)
   ========================================================================== */
.page-header {
  padding: 64px 0 42px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  position: relative;
  z-index: 1;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  color: var(--text-main);
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

.content-box {
  max-width: 900px;
  margin: 48px auto 80px;
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 48px;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
}

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

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

.content-section h2 {
  font-size: 1.45rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-coral-light);
}

.content-section p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.content-section ul {
  padding-left: 22px;
  margin-bottom: 16px;
}

.content-section ul li {
  list-style: disc;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.highlight-box {
  background: var(--primary-coral-light);
  border-left: 4px solid var(--primary-coral);
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  margin: 20px 0;
}

.highlight-box p {
  margin: 0;
  color: var(--text-main);
  font-weight: 600;
}

/* 推荐资讯卡片流样式 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.news-card {
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 28px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

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

.news-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.8rem;
}

.news-category {
  color: var(--primary-coral);
  background: var(--primary-coral-light);
  padding: 3px 10px;
  border-radius: 6px;
  font-weight: 700;
}

.news-date {
  color: var(--text-subtle);
}

.news-card-title {
  font-size: 1.2rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.45;
}

.news-card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.news-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--primary-coral);
}

.news-read-more svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.news-card:hover .news-read-more svg {
  transform: translateX(4px);
}

/* 网站地图卡片网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 24px;
}

.sitemap-card h3 {
  font-size: 1.15rem;
  margin-bottom: 14px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-card ul {
  list-style: none;
  padding: 0;
}

.sitemap-card ul li {
  margin-bottom: 10px;
}

.sitemap-card ul li a {
  color: var(--primary-coral);
  font-weight: 550;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sitemap-card ul li a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   SEO 深度长文专版样式 (Article Layout & Typography)
   ========================================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-subtle);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.breadcrumb-sep {
  opacity: 0.45;
}

.breadcrumb-current {
  color: var(--text-main);
  font-weight: 600;
}

.article-wrap {
  max-width: 920px;
  margin: 32px auto 80px;
  background: var(--bg-surface-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 56px 48px;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
}

.article-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 28px;
  margin-bottom: 32px;
}

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

.article-category-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 9999px;
  background: var(--primary-coral-light);
  color: var(--primary-coral);
}

.article-h1 {
  font-size: 2.25rem;
  font-weight: 850;
  line-height: 1.35;
  letter-spacing: -0.025em;
  color: var(--text-main);
  margin-bottom: 18px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
}

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

.article-meta-item svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
  color: var(--primary-coral);
}

/* 目录盒子 (Table of Contents) */
.article-toc {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px 28px;
  margin-bottom: 36px;
}

.article-toc-title {
  font-size: 1.1rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.article-toc-item {
  font-size: 0.94rem;
  font-weight: 550;
}

.article-toc-item a {
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

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

.article-toc-num {
  color: var(--primary-coral);
  font-weight: 700;
  font-size: 0.85rem;
}

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

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 44px 0 18px;
  padding-left: 14px;
  border-left: 4px solid var(--primary-coral);
  letter-spacing: -0.015em;
  scroll-margin-top: 90px;
}

.article-content h3 {
  font-size: 1.22rem;
  font-weight: 750;
  color: var(--text-main);
  margin: 28px 0 14px;
  letter-spacing: -0.01em;
  scroll-margin-top: 90px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  margin: 16px 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.75;
}

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

/* 站内高亮内链 */
.internal-link {
  color: var(--primary-coral);
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity 0.2s ease;
}

.internal-link:hover {
  opacity: 0.85;
}

/* 提示卡片 */
.callout {
  border-radius: 14px;
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 0.96rem;
  line-height: 1.7;
}

.callout-coral {
  background: var(--primary-coral-light);
  border: 1px solid rgba(255, 107, 91, 0.25);
  color: var(--text-main);
}

.callout-blue {
  background: var(--secondary-blue-light);
  border: 1px solid rgba(14, 165, 233, 0.25);
  color: var(--text-main);
}

/* 数据对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 14px;
  border: 1px solid var(--border-color);
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

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

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

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

.seo-table tr:hover td {
  background: var(--bg-surface-elevated);
}

/* 文章专属 FAQ 区域 */
.article-faq-section {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.article-faq-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-item {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px 22px;
  margin-bottom: 14px;
}

.article-faq-q {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-q-icon {
  color: var(--primary-coral);
  font-weight: 800;
}

.article-faq-a {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 相关阅读区域 (Related Reading) */
.article-related-section {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}

.article-related-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.article-related-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

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

.article-related-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-coral);
  margin-bottom: 8px;
}

.article-related-headline {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 8px;
  flex-grow: 1;
}

.article-related-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-coral);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 文章内置高转化 CTA 框 */
.article-cta-box {
  background: var(--gradient-coral-soft);
  color: #fff;
  border-radius: 20px;
  padding: 36px 32px;
  margin: 44px 0 20px;
  text-align: center;
  box-shadow: 0 16px 36px -4px rgba(255, 107, 91, 0.4);
}

.article-cta-box h3 {
  font-size: 1.6rem;
  font-weight: 850;
  color: #fff;
  margin: 0 0 10px;
}

.article-cta-box p {
  font-size: 0.98rem;
  opacity: 0.92;
  max-width: 600px;
  margin: 0 auto 24px;
  color: #fff;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端单栏与轻快触控
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.75rem;
  }
  .bento-grid,
  .pricing-grid,
  .testimonials-grid,
  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    display: none;
    box-shadow: var(--shadow-lg);
  }

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

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 56px 0 40px;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

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

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

  /* 3列计数器在手机端变为垂直单列或紧凑列 */
  .metrics-row {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 20px;
  }

  .metric-item:not(:last-child)::after {
    display: none;
  }

  .metric-item:not(:last-child) {
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 14px;
  }

  /* 手机端完美单栏展示 */
  .bento-grid,
  .showcase-grid,
  .pricing-grid,
  .testimonials-grid,
  .news-grid,
  .article-related-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .article-wrap {
    padding: 30px 20px;
    margin: 20px auto 48px;
    border-radius: 16px;
  }

  .article-h1 {
    font-size: 1.65rem;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .content-box {
    padding: 24px;
    margin: 28px auto 48px;
  }

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

  .bottom-cta-banner {
    padding: 40px 20px;
    border-radius: 20px;
  }

  .bottom-cta-heading {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .logo-img {
    height: 28px;
    max-width: 140px;
  }

  .app-pills {
    grid-template-columns: 1fr;
  }

  .bento-card,
  .showcase-card,
  .pricing-card {
    padding: 24px 18px;
  }

  .plan-price {
    font-size: 2.6rem;
  }
}