/* ==========================================================================
   闪电猫机场 (SpeedCAT) 全局原生极简响应式样式表
   薄荷绿 (Mint Green) 清爽主题 | 零重型框架 | 4.5:1+高对比度 | 无障碍触控
   ========================================================================== */

:root {
  /* 薄荷绿 (Mint Green) 主题色彩体系 */
  --bg-primary: #edf8f4;         /* 整体主背景：清爽纯正浅薄荷绿 */
  --bg-secondary: #e0f2eb;       /* 辅助交替区块背景：柔和淡薄荷绿 */
  --bg-card: #ffffff;            /* 内容卡片底色：纯净亮白，层次分明 */
  --bg-card-hover: #f5fcf9;      /* 卡片悬停微光 */
  --text-primary: #0f2e26;       /* 主标题与正文：深林墨绿，对比度超 11:1 */
  --text-secondary: #285448;     /* 副标题与描述：深雅苔绿，对比度超 5.5:1 */
  --text-muted: #537a6f;         /* 弱化辅助字色，对比度符合 4.5:1 */
  --accent-cyan: #059669;        /* 翡翠薄荷绿高光主色 */
  --accent-cyan-hover: #047857;  /* 交互深绿 */
  --accent-amber: #d97706;       /* 暖橙微调标签 */
  --accent-purple: #0d9488;      /* 青碧科技过渡色 */
  --accent-glow: rgba(5, 150, 105, 0.12);
  --border-color: rgba(5, 150, 105, 0.16);  /* 浅薄荷精细微边框 */
  --border-active: rgba(5, 150, 105, 0.45); /* 激活与焦点边框 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --header-height: 72px;
  --shadow-card: 0 10px 25px -5px rgba(15, 46, 38, 0.07), 0 8px 10px -6px rgba(15, 46, 38, 0.04);
  --shadow-btn: 0 4px 14px 0 rgba(5, 150, 105, 0.28);
}

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-base);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-primary);
}

/* 键盘无障碍跳过导航 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--accent-cyan);
  color: #ffffff;
  font-weight: 700;
  padding: 12px 20px;
  z-index: 9999;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 15px;
  outline: 3px solid #047857;
}

/* 焦点轮廓 */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 锚点防遮挡 */
[id] {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

/* 导航栏 Header (清新薄荷毛玻璃) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(237, 248, 244, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  display: flex;
  align-items: center;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  display: block;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.2);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.brand-logo:hover .brand-icon {
  transform: scale(1.06);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
}
.footer-brand .brand-icon {
  width: 28px;
  height: 28px;
}
.brand-logo .brand-highlight {
  color: var(--accent-cyan);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
}
.nav-link:hover, .nav-link:focus, .nav-link.active {
  color: var(--accent-cyan);
}

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

/* 统一按钮设计 (触摸区 >= 44x44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
  color: #ffffff;
  font-weight: 700;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #10b981 0%, #0f766e 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(5, 150, 105, 0.4);
}
.btn-secondary {
  background: rgba(5, 150, 105, 0.08);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: rgba(5, 150, 105, 0.16);
  border-color: var(--border-active);
  color: var(--accent-cyan);
}
.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  min-height: 48px;
  border-radius: var(--radius-md);
}

/* 区块通用结构 */
.section-block {
  padding: 72px 0;
}
.section-block-alt {
  background-color: var(--bg-secondary);
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px auto;
}
.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  padding: 4px 12px;
  background: var(--accent-glow);
  border-radius: 9999px;
  border: 1px solid rgba(5, 150, 105, 0.25);
}
.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 首页 Hero 主视觉区 */
.hero-section {
  padding: 80px 0 60px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(5, 150, 105, 0.08) 0%, transparent 70%);
}
.hero-content {
  max-width: 860px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(5, 150, 105, 0.1);
  border: 1px solid rgba(5, 150, 105, 0.25);
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}
.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.hero-title .gradient-text {
  background: linear-gradient(135deg, #059669 0%, #0d9488 50%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 700;
  color: #047857;
  margin-bottom: 18px;
  line-height: 1.45;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #047857 0%, #0f766e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-intro {
  font-size: 1.12rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.hero-features-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  margin-top: 20px;
  box-shadow: var(--shadow-card);
}
.hero-feat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.hero-feat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-cyan);
}
.hero-feat-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 核心优势卡片（3个图文卡片） */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card-advantage {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-card);
}
.card-advantage:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-4px);
  box-shadow: 0 14px 30px -4px rgba(15, 46, 38, 0.12);
}
.card-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid rgba(5, 150, 105, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  flex-shrink: 0;
}
.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.card-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-list li::before {
  content: "✓";
  color: var(--accent-cyan);
  font-weight: 800;
}

/* 流媒体与 AI 支持图卡 */
.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-card);
}
.support-header {
  display: flex;
  align-items: center;
  gap: 16px;
}
.support-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(13, 148, 136, 0.12);
  border: 1px solid rgba(13, 148, 136, 0.25);
  color: var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.support-icon.ai-icon {
  background: rgba(5, 150, 105, 0.12);
  border-color: rgba(5, 150, 105, 0.25);
  color: var(--accent-cyan);
}
.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.service-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* 套餐价格对比表 */
.pricing-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-card);
}
.pricing-table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}
.pricing-table caption {
  caption-side: bottom;
  text-align: right;
  font-size: 0.825rem;
  color: var(--text-muted);
  padding: 12px 16px 4px;
}
.pricing-table th, .pricing-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}
.pricing-table th {
  background: rgba(5, 150, 105, 0.05);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.95rem;
}
.pricing-table tbody tr:hover {
  background: rgba(5, 150, 105, 0.03);
}
.pricing-table tbody tr.popular-row {
  background: rgba(5, 150, 105, 0.06);
}
.plan-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.plan-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--accent-amber);
  color: #ffffff;
  font-weight: 800;
  border-radius: 4px;
}
.price-tag {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-cyan);
}
.price-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: normal;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-card);
}
.review-rating {
  color: var(--accent-amber);
  font-size: 1.1rem;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  font-style: italic;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}
.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}
.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ 常见问题 (默认原生展开 details open) */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-card);
}
.faq-item:hover, .faq-item[open] {
  border-color: var(--border-active);
  box-shadow: 0 6px 18px rgba(5, 150, 105, 0.1);
}
.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--accent-cyan);
  font-weight: 400;
  line-height: 1;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq-item[open] > .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 24px 24px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(5, 150, 105, 0.12);
  padding-top: 16px;
}
.faq-answer a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
}
.faq-answer a:hover {
  color: var(--accent-cyan-hover);
}

/* 页脚 Footer (高雅深林墨绿底色，压轴沉稳，对比鲜明) */
.site-footer {
  background: #08211a;
  border-top: 1px solid rgba(5, 150, 105, 0.25);
  padding: 56px 0 32px 0;
  margin-top: auto;
  color: #ecfdf5;
}
.site-footer .brand-logo {
  color: #ffffff;
}
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand {
  max-width: 360px;
}
.footer-brand p {
  color: #a7f3d0;
  font-size: 0.875rem;
  margin-top: 8px;
}

/* 严格限定仅保留 4 个标题 */
.footer-nav-exact {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  flex-wrap: wrap;
}
.footer-nav-exact a {
  color: #f0fdf9;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 4px;
}
.footer-nav-exact a:hover {
  color: #34d399;
}
.footer-bottom {
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.825rem;
  color: #6ee7b7;
}

/* 知识科普中心 & 文章排版样式 */
.knowledge-hero {
  padding: 60px 0 40px 0;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(5, 150, 105, 0.08) 0%, transparent 70%);
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-card);
}
.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -3px rgba(15, 46, 38, 0.1);
}
.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}
.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}
.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}
.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(5, 150, 105, 0.1);
  padding-top: 14px;
}
.article-read-more {
  color: var(--accent-cyan);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
}

/* 文章详情页排版 */
.article-container {
  max-width: 840px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.article-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
}
.article-breadcrumb a:hover {
  color: var(--accent-cyan);
}
.article-post-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.28;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #1e3a32;
}
.article-content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(5, 150, 105, 0.16);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px 0;
}
.article-content p {
  margin-bottom: 20px;
}
.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
}
.article-content blockquote {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(5, 150, 105, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-secondary);
}
.article-cta-box {
  background: linear-gradient(135deg, rgba(5, 150, 105, 0.08) 0%, rgba(13, 148, 136, 0.12) 100%);
  border: 1px solid rgba(5, 150, 105, 0.28);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}
.article-cta-box h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* 单页专属样式（关于我们、服务条款、隐私政策、网站地图） */
.page-hero {
  padding: 60px 0 36px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}
.page-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}
.page-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px;
}
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-card);
}
.content-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.content-card p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}
.content-card ul {
  padding-left: 20px;
  margin-bottom: 16px;
}
.content-card li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

/* 网站地图层级树 */
.sitemap-tree {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.sitemap-group {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.sitemap-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(5, 150, 105, 0.12);
}
.sitemap-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sitemap-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
}
.sitemap-links a:hover {
  color: var(--accent-cyan);
}
.sitemap-links a::before {
  content: "→";
  color: var(--accent-cyan);
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏与手指点击体验
   ========================================================================== */

@media (max-width: 1024px) {
  .advantages-grid, .reviews-grid, .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-features-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-subtitle {
    font-size: 1.12rem;
  }
  .section-title {
    font-size: 1.65rem;
  }
  .hero-intro {
    font-size: 1rem;
  }
  .main-nav {
    display: none; /* 移动端精简模式 */
  }
  .advantages-grid, .reviews-grid, .support-grid, .article-grid, .sitemap-tree {
    grid-template-columns: 1fr;
  }
  .hero-features-bar {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-nav-exact {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .pricing-wrapper {
    padding: 8px;
  }
  .content-card {
    padding: 24px 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .card-advantage, .support-card, .review-card, .article-card {
    padding: 20px 16px;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 0.98rem;
  }
  .faq-answer {
    padding: 0 18px 18px 18px;
  }
}