/* TAG VPN (tagvpn.cyou) 官方落地页样式表 - 白色极简科技版（对齐截图设计） */

:root {
  /* 品牌核心主色（亮天蓝与电极青 Gradient，对齐图片TAGVPN视觉） */
  --primary-blue: #0284c7;        /* 经典天蓝 */
  --primary-cyan: #0ea5e9;        /* 电极青 */
  --primary-hover: #0369a1;
  --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  --primary-btn-gradient: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);

  /* 辅助视觉色彩 */
  --accent-emerald: #10b981;      /* 线路在线绿 */
  --accent-indigo: #6366f1;       /* 紫靛 */
  --accent-amber: #f59e0b;        /* 星级黄 */
  --accent-red: #ef4444;          /* 对比红 */

  /* 页面背景（纯白与柔和灰，完全替代暗黑模式） */
  --bg-main: #ffffff;             /* 主背景纯白 */
  --bg-alt: #f8fafc;              /* 模块交替浅灰 */
  --bg-card: #ffffff;             /* 卡片纯白 */
  --bg-header: rgba(255, 255, 255, 0.95);

  /* 字色与排版 */
  --text-heading: #0f172a;        /* 标题深灰黑色 */
  --text-body: #334155;           /* 正文灰 */
  --text-muted: #64748b;          /* 辅助中灰 */
  --text-light: #94a3b8;          /* 浅灰 */

  /* 边框与阴影 */
  --border-light: #e2e8f0;
  --border-hover: #0ea5e9;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 12px 30px -4px rgba(14, 165, 233, 0.15);

  --font-main: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 容器与版式 */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: #e0f2fe;
  color: var(--primary-blue);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  border: 1px solid #bae6fd;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  color: var(--text-heading);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--primary-btn-gradient);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.45);
}

.btn-outline {
  background: #ffffff;
  color: var(--text-heading);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.btn-recommend {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.25);
}

.btn-recommend:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

/* 头部 Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--primary-blue);
  letter-spacing: -0.5px;
}

.brand-logo img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: contain;
}

.brand-title span {
  color: var(--primary-blue);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-body);
  font-size: 0.94rem;
  font-weight: 500;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-blue);
}

.nav-link.active-dot::before {
  content: '🟢 ';
  font-size: 0.75rem;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 1.4rem;
  cursor: pointer;
}

/* 英雄区 Hero Section（100% 对齐用户照片中居中微亮蓝渐变排版） */
.hero-section {
  padding: 150px 0 80px;
  text-align: center;
  background: 
    radial-gradient(ellipse at 50% 0%, rgba(14, 165, 233, 0.08) 0%, rgba(255, 255, 255, 0) 70%),
    var(--bg-main);
}

.hero-centered-content {
  max-width: 860px;
  margin: 0 auto;
}

/* 军事级加密胶囊标签 */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: var(--text-body);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 28px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.hero-main-title {
  font-size: 3.8rem;
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-paragraph {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto 36px;
}

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

/* Hero 数据卡片区（对齐照片中4个白色带阴影的并排数据框） */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1060px;
  margin: 0 auto;
}

.stat-box-white {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease;
}

.stat-box-white:hover {
  transform: translateY(-3px);
  border-color: var(--primary-cyan);
}

.stat-number-blue {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary-cyan);
  margin-bottom: 6px;
  line-height: 1;
}

.stat-label-gray {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* 核心功能卡片区（对齐照片底部绿色边框与蓝色边框卡片） */
.feature-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 50px;
}

.feature-card-photo {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: left;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.feature-card-photo.green-border {
  border-left: 5px solid var(--accent-emerald);
}

.feature-card-photo.blue-border {
  border-left: 5px solid var(--primary-cyan);
}

.feature-photo-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.feature-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.green-icon {
  background: #d1fae5;
  color: var(--accent-emerald);
}

.blue-icon {
  background: #e0f2fe;
  color: var(--primary-cyan);
}

.feature-photo-head h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-heading);
}

.feature-photo-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 全新独家 benchmark 专线对比设计 */
.benchmark-pill-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.benchmark-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-heading);
}

.comparison-grid-new {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: stretch;
}

.comp-box-pro {
  background: #ffffff;
  border: 2px solid var(--primary-cyan);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 12px 36px rgba(14, 165, 233, 0.12);
  position: relative;
}

.comp-box-cheap {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
}

.comp-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 22px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.comp-box-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.comp-pro-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.comp-cheap-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fee2e2;
  color: var(--accent-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.comp-pro-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-heading);
}

.comp-pro-subtitle {
  font-size: 0.82rem;
  color: var(--primary-blue);
  font-weight: 600;
}

.comp-cheap-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-heading);
}

.comp-cheap-subtitle {
  font-size: 0.82rem;
  color: var(--accent-red);
  font-weight: 600;
}

.badge-pro {
  background: #d1fae5;
  color: var(--accent-emerald);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid #a7f3d0;
}

.badge-cheap {
  background: #fee2e2;
  color: var(--accent-red);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid #fca5a5;
}

.comp-feature-rows {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.comp-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.comp-icon-check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #d1fae5;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.comp-icon-cross {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fee2e2;
  color: var(--accent-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.comp-text-wrap h4 {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 3px;
}

.comp-text-wrap p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* 独家 Bento 特性架构卡片组 */
.features-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-cyan);
  box-shadow: var(--shadow-hover);
}

.bento-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: #e0f2fe;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.bento-metric-tag {
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--accent-emerald);
  background: #d1fae5;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.bento-card h3 {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.bento-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 独家全球节点 Matrix 矩阵 */
.nodes-matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.node-card-pro {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.node-card-pro:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.node-pro-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.node-pro-flag {
  font-size: 2.2rem;
  line-height: 1;
}

.node-ping-badge {
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--accent-emerald);
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.node-pro-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.node-pro-tag {
  font-size: 0.78rem;
  color: var(--primary-blue);
  font-weight: 700;
  margin-bottom: 10px;
}

.node-pro-footer {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 10px;
  border-top: 1px dashed var(--border-light);
}

/* 时间线 Roadmap */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card-clean {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.step-num-blue {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary-cyan);
  margin-bottom: 8px;
  line-height: 1;
}

.step-title-clean {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.step-desc-clean {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 价格套餐 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pricing-card-clean {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.pricing-card-clean:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.pricing-card-clean.popular {
  border: 2px solid var(--primary-cyan);
}

.popular-badge-blue {
  position: absolute;
  top: -13px;
  right: 20px;
  background: var(--primary-btn-gradient);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.76rem;
  padding: 3px 12px;
  border-radius: var(--radius-full);
}

.plan-title-clean {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.plan-sub-clean {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 38px;
}

.plan-price-clean {
  margin-bottom: 24px;
}

.price-main-blue {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary-blue);
}

.price-cycle-gray {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-feature-list-clean {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-list-clean li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-body);
}

.plan-feature-list-clean i {
  color: var(--accent-emerald);
  font-size: 0.85rem;
}

/* 独家杂志风文章专栏设计 */
.articles-grid-magazine {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card-magazine {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.article-card-magazine::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary-btn-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.article-card-magazine:hover {
  transform: translateY(-5px);
  border-color: var(--primary-cyan);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.15);
}

.article-card-magazine:hover::before {
  opacity: 1;
}

.article-mag-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-category-pill {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--primary-blue);
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.article-read-badge {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.article-card-magazine h3 {
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--text-heading);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.article-card-magazine h3 a {
  color: var(--text-heading);
  transition: color 0.25s ease;
}

.article-card-magazine h3 a:hover {
  color: var(--primary-blue);
}

.article-summary-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

.article-mag-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
}

.article-author-info {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.article-author-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #e0f2fe;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

.article-read-more-link {
  color: var(--primary-blue);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s ease;
}

.article-read-more-link:hover {
  gap: 8px;
}

/* SEO文章卡片组 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card-clean {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

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

.article-tag-blue {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--primary-blue);
  background: #e0f2fe;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

/* 独家 Pro 用户评价卡片 */
.reviews-grid-pro {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card-pro {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.review-card-pro:hover {
  transform: translateY(-5px);
  border-color: var(--primary-cyan);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.12);
}

.review-user-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar-pro {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.avatar-pro.purple {
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
}

.avatar-pro.emerald {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.avatar-pro.cyan {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
}

.user-meta-wrap h4 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}

.user-meta-wrap span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.review-rating-stars {
  color: var(--accent-amber);
  font-size: 0.9rem;
  margin-bottom: 14px;
  display: flex;
  gap: 3px;
}

.review-quote-body {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.68;
  font-style: normal;
  position: relative;
}

.article-card-clean h3 {
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.article-card-clean h3 a:hover {
  color: var(--primary-blue);
}

.article-desc-gray {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.article-foot-meta-clean {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

/* 用户评价区 */
.reviews-grid-clean {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-box-clean {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.review-user-row-clean {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.review-avatar-blue {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-btn-gradient);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.review-user-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-heading);
}

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

.review-stars {
  color: var(--accent-amber);
  font-size: 0.85rem;
  margin-bottom: 12px;
  display: flex;
  gap: 3px;
}

.review-text-gray {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* 全新 Pro 手风琴 FAQ 设计 */
.faq-wrap-pro {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-box-pro {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.faq-box-pro.active {
  border-color: var(--primary-cyan);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.12);
}

.faq-head-pro {
  padding: 22px 28px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  transition: color 0.25s ease;
}

.faq-head-pro:hover {
  color: var(--primary-blue);
}

.faq-box-pro.active .faq-head-pro {
  color: var(--primary-blue);
  background: #f0f9ff;
}

.faq-icon-pro {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e0f2fe;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.faq-box-pro.active .faq-icon-pro {
  transform: rotate(180deg);
  background: var(--primary-blue);
  color: #ffffff;
}

.faq-body-pro {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-box-pro.active .faq-body-pro {
  max-height: 300px;
}

.faq-inner-pro {
  padding: 0 28px 22px 28px;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px dashed #e0f2fe;
  margin-top: 4px;
  padding-top: 16px;
}
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-heading);
}

.faq-head-clean:hover {
  color: var(--primary-blue);
}

.faq-icon-toggle {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.faq-box-clean.active .faq-icon-toggle {
  transform: rotate(180deg);
  color: var(--primary-blue);
}

.faq-body-clean {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  background: #f8fafc;
}

.faq-box-clean.active .faq-body-clean {
  max-height: 300px;
}

.faq-body-inner-clean {
  padding: 0 24px 18px;
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.7;
}

/* 页脚 Footer & PBN 链接 */
.site-footer-clean {
  background-color: #f8fafc;
  border-top: 1px solid var(--border-light);
  padding: 70px 0 35px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-grid-clean {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand-clean p {
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 360px;
}

.footer-col-clean h4 {
  color: var(--text-heading);
  font-size: 0.96rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-col-clean ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-clean a {
  color: var(--text-muted);
}

.footer-col-clean a:hover {
  color: var(--primary-blue);
}

/* PBN 友情链接输血管道 */
.footer-pbn-area {
  padding: 14px 0;
  margin-bottom: 16px;
  border-top: 1px dashed var(--border-light);
  text-align: center;
}

.pbn-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.82rem;
  color: #64748b;
}

.pbn-label {
  color: #64748b;
}

.pbn-link {
  color: #475569;
  text-decoration: none;
  font-weight: 500;
}

.pbn-link:hover {
  color: var(--primary-blue);
  text-decoration: underline;
}

.footer-bottom-copy {
  text-align: center;
  font-size: 0.82rem;
  color: #94a3b8;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

/* 文章详情页 White 方案 */
.article-header-clean {
  padding: 130px 0 35px;
  background: radial-gradient(ellipse at top, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
  border-bottom: 1px solid var(--border-light);
}

.breadcrumbs {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.breadcrumbs a {
  color: var(--primary-blue);
}

.article-title-clean {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-layout {
  display: grid;
  grid-template-columns: 2.5fr 1fr;
  gap: 40px;
  padding: 50px 0 90px;
}

.article-content {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-body);
}

.article-content h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-heading);
  margin: 32px 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 24px 0 10px;
}

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

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

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  background: #f0f9ff;
  border-left: 4px solid var(--primary-cyan);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.article-content blockquote p {
  margin: 0;
  color: var(--text-heading);
  font-size: 0.96rem;
}

.article-cta-box-clean {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid #bae6fd;
  border-radius: var(--radius-lg);
  padding: 30px;
  margin: 36px 0;
  text-align: center;
}

.article-cta-box-clean h3 {
  margin-top: 0;
  color: var(--text-heading);
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget-clean {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.sidebar-widget-clean h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.related-posts {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.88rem;
}

.related-posts a {
  color: var(--text-body);
  line-height: 1.5;
}

.related-posts a:hover {
  color: var(--primary-blue);
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .hero-stats-grid, .nodes-grid, .timeline-grid, .pricing-grid, .articles-grid, .reviews-grid-clean {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-cards-row, .comparison-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid-clean {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-card);
  }
  .nav-menu.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-main-title {
    font-size: 2.6rem;
  }
  .hero-sub-title {
    font-size: 1.4rem;
  }
  .hero-stats-grid, .nodes-grid, .timeline-grid, .pricing-grid, .articles-grid, .reviews-grid-clean {
    grid-template-columns: 1fr;
  }
  .footer-grid-clean {
    grid-template-columns: 1fr;
  }
}