/* ==========================================================================
   Nice加速机场官网 - 原生极简高转化样式表
   0 外部依赖 | 纯原生 CSS | 秒开级加载性能 | 完整响应式适配
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #0ea5e9;
  --accent-glow: rgba(14, 165, 233, 0.2);
  --success: #10b981;
  --warning: #f59e0b;
  
  /* ==========================================
     钛金灰色系 (Titanium Gray Palette)
     ========================================== */
  --titanium-base: #dce0e6;           /* 质感钛金灰 (页面主背景) */
  --titanium-alt: #cfd5de;            /* 次级区钛金灰 */
  --titanium-surface: #e9ecf1;        /* 高亮金属表面 */
  --titanium-border: #b8c0cc;         /* 钛金金属拉丝边框 */
  
  --titanium-dark: #181b22;           /* 深空钛金灰 (Hero / 页脚底色) */
  --titanium-dark-surface: #222630;   /* 深钛金表面 */
  --titanium-dark-card: #282d38;      /* 深钛金卡片 */
  --titanium-dark-border: #383f4e;    /* 深钛金边框 */
  
  --bg-dark: var(--titanium-dark);
  --bg-dark-surface: var(--titanium-dark-surface);
  --bg-dark-card: var(--titanium-dark-card);
  --bg-light: var(--titanium-base);
  --bg-white: #ffffff;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #5b687c;
  --text-white: #f8fafc;
  --text-light-muted: #94a3b8;
  
  --border-light: var(--titanium-border);
  --border-dark: var(--titanium-dark-border);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 8px -1px rgba(15, 23, 42, 0.12), 0 2px 4px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 20px -3px rgba(15, 23, 42, 0.14), 0 4px 6px -4px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.18), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-light);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* 键盘可访问性：跳过导航链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--primary);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--accent);
}

/* 焦点高亮 */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* 容器定义 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* 锚点防遮挡 */
[id] {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

/* ==========================================================================
   页眉与导航
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(24, 27, 34, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.02em;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: #0f172a;
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px var(--accent-glow);
  flex-shrink: 0;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-logo:hover .logo-badge {
  transform: scale(1.05);
  border-color: #38bdf8;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
}

.logo-badge svg {
  width: 100%;
  height: 100%;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-light-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-white);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.45);
}

/* ==========================================================================
   按钮系统 (满足触摸区域 >= 44x44px)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  min-width: 44px;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

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

.btn-light:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   主视觉区 (Hero Section)
   ========================================================================== */
.hero-section {
  background: radial-gradient(circle at 50% 10%, #2f3542 0%, var(--bg-dark) 85%);
  color: var(--text-white);
  padding: 4.5rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

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

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
  color: #ffffff;
}

.hero-title span {
  background: linear-gradient(135deg, #60a5fa 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: #cbd5e1;
  font-weight: 500;
  margin-bottom: 1.25rem;
}

.hero-desc {
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1rem;
  color: var(--text-light-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-light-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-badge-item svg {
  color: var(--success);
}

/* ==========================================================================
   通用板块标题与样式
   ========================================================================== */
.section {
  padding: 5rem 0;
}

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

.section-dark {
  background-color: var(--bg-dark-surface);
  color: var(--text-white);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section-dark .section-tag {
  color: var(--accent);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  color: inherit;
  margin-bottom: 1rem;
}

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

.section-dark .section-desc {
  color: var(--text-light-muted);
}

/* ==========================================================================
   核心优势 (3个图文卡片)
   ========================================================================== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.card-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  background: var(--primary-light);
  color: var(--primary);
}

.card-icon-box.accent {
  background: rgba(14, 165, 233, 0.1);
  color: var(--accent);
}

.card-icon-box.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.card-feature-list {
  list-style: none;
  margin-top: auto;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

.card-feature-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.card-feature-list li svg {
  color: var(--success);
  flex-shrink: 0;
}

/* ==========================================================================
   套餐价格对比表 (表格语义 + 响应式横向滚动)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.pricing-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.2);
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pricing-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  min-height: 40px;
  margin-bottom: 1.25rem;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

.currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.amount {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.pricing-features li svg {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* 规范语义化价格对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-top: 2rem;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  min-width: 680px;
}

.pricing-table caption {
  padding: 1.25rem;
  font-weight: 700;
  font-size: 1.1rem;
  text-align: left;
  color: var(--text-primary);
  background: var(--titanium-surface);
  border-bottom: 1px solid var(--border-light);
}

.pricing-table th,
.pricing-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.pricing-table th {
  background: var(--titanium-surface);
  font-weight: 600;
  color: var(--text-secondary);
}

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

.pricing-table tbody tr:hover {
  background: var(--titanium-surface);
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.ecosystem-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
}

.ecosystem-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.ecosystem-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.2);
  color: var(--accent);
}

.ecosystem-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-white);
}

.ecosystem-desc {
  color: var(--text-light-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: auto;
}

.eco-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #e2e8f0;
  font-weight: 500;
}

.eco-tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

/* ==========================================================================
   用户真实评价
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.review-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.review-stars {
  color: #f59e0b;
  display: flex;
  gap: 0.2rem;
  margin-bottom: 1rem;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 0.9rem;
}

.user-meta-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.user-meta-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答 (FAQ) - details/summary 默认 open 展开
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: #cbd5e1;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  transition: transform 0.2s ease;
  color: var(--text-muted);
}

.faq-item[open] .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

.faq-answer a {
  text-decoration: underline;
  font-weight: 600;
}

/* ==========================================================================
   知识科普文章列表与内容页样式
   ========================================================================== */
.knowledge-hero {
  background: radial-gradient(circle at 50% 10%, #2f3542 0%, var(--bg-dark) 85%);
  color: var(--text-white);
  padding: 3.5rem 0;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.article-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.article-tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.article-card-title a {
  color: inherit;
}

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

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

/* 文章详情页单栏排版 */
.article-detail-wrap {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  margin-top: -2rem;
  margin-bottom: 4rem;
  position: relative;
  z-index: 10;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

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

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

.breadcrumbs span {
  color: #94a3b8;
}

.article-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.article-header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.75rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  color: #1e3a8a;
  font-size: 0.95rem;
}

.article-content strong {
  color: var(--text-primary);
}

.article-cta-box {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: var(--radius-md);
  padding: 2rem;
  color: #ffffff;
  text-align: center;
  margin: 2.5rem 0;
}

.article-cta-box h3 {
  color: #ffffff;
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.article-cta-box p {
  color: #94a3b8;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   独立信息页排版 (关于我们、服务条款、隐私政策、网站地图)
   ========================================================================== */
.page-hero {
  background: radial-gradient(circle at 50% 10%, #2f3542 0%, var(--bg-dark) 85%);
  color: var(--text-white);
  padding: 3.5rem 0;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: #94a3b8;
  font-size: 1.05rem;
}

.static-page-card {
  max-width: 860px;
  margin: -2rem auto 4rem;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  position: relative;
  z-index: 10;
}

.static-page-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-light);
}

.static-page-card h2:first-of-type {
  margin-top: 0;
}

.static-page-card p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #334155;
  margin-bottom: 1rem;
}

.static-page-card ul {
  margin: 0.75rem 0 1.25rem 1.5rem;
}

.static-page-card li {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #334155;
  margin-bottom: 0.4rem;
}

/* HTML 网站地图链接分组 */
.sitemap-group {
  margin-bottom: 2.25rem;
}

.sitemap-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sitemap-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.sitemap-list li a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--titanium-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: #1e293b;
  transition: all 0.15s ease;
}

.sitemap-list li a:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateX(3px);
}

/* ==========================================================================
   页脚规范：根据提示词，页脚只保留四个标题 (网站地图、关于我们、服务条款、隐私政策)
   并且全部点击在新页面打开
   ========================================================================== */
.site-footer {
  background-color: var(--bg-dark);
  color: var(--text-light-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3rem 0 2.5rem;
  margin-top: auto;
}

.footer-nav-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-nav-wrap a {
  color: #cbd5e1;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.5rem 0.25rem;
  transition: color 0.2s ease;
}

.footer-nav-wrap a:hover {
  color: var(--accent);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.75rem;
  font-size: 0.85rem;
  color: #64748b;
}

/* ==========================================================================
   响应式媒体查询适配 (单栏手机端，触控优化)
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .site-header {
    height: auto;
    padding: 0.75rem 0;
  }
  
  .nav-container {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1rem;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .sitemap-list {
    grid-template-columns: 1fr;
  }
  
  .hero-section {
    padding: 3rem 0 3.5rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .article-detail-wrap,
  .static-page-card {
    padding: 1.75rem 1.25rem;
    margin-top: 0;
    margin-bottom: 2rem;
    border-radius: var(--radius-md);
  }
  
  .footer-nav-wrap {
    gap: 1.25rem 2rem;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 1.75rem;
  }
  .pricing-card {
    padding: 1.75rem 1.25rem;
  }
  .ecosystem-card {
    padding: 1.5rem 1.25rem;
  }
}