/* ==========================================================================
   魔戒机场官网 (mojie-jichang.monster) - 原生极简高转化样式表
   无外部字体依赖，秒开加载，完美响应式，无障碍适配 (WCAG AA 4.5:1+)
   ========================================================================== */

:root {
  --color-bg: #090d16;
  --color-bg-alt: #0f172a;
  --color-surface: #131c31;
  --color-surface-hover: #1b2742;
  --color-card-border: rgba(255, 255, 255, 0.08);
  --color-card-border-glow: rgba(99, 102, 241, 0.35);

  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;

  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-secondary: #06b6d4;
  --color-accent: #f43f5e;
  --color-success: #10b981;

  --gradient-cta: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #a855f7 100%);
  --gradient-cta-hover: linear-gradient(135deg, #4338ca 0%, #6d28d9 50%, #9333ea 100%);
  --gradient-badge: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 30%, #818cf8 100%);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);

  --container-max: 1200px;
  --header-height: 72px;
}

/* 基础重置与无障碍 */
*, *::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(--color-text-secondary);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151b33 0%, #090d16 70%);
}

/* 键盘可访问无障碍跳跃链接 */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--color-primary);
  color: #ffffff;
  padding: 12px 20px;
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 15px;
  outline: 3px solid #ffffff;
}

/* 锚点偏移量，防止固定导航遮挡 */
[id] {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}
a:hover {
  color: #ffffff;
}
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 3px;
}

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

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: rgba(15, 23, 42, 0.4);
  border-top: 1px solid var(--color-card-border);
  border-bottom: 1px solid var(--color-card-border);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-secondary);
  background: var(--gradient-badge);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 13, 22, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-card-border);
  min-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: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-primary);
  text-decoration: none;
}
.brand-logo svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary-light);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 0;
  position: relative;
}
.nav-link:hover, .nav-link.active {
  color: #ffffff;
}
.nav-link.highlight {
  color: var(--color-secondary);
  font-weight: 600;
}

/* 核心 CTA 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  min-width: 44px;
  padding: 10px 24px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-cta);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  background: var(--gradient-cta-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
  border-color: var(--color-card-border);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-lg {
  min-height: 54px;
  padding: 14px 34px;
  font-size: 1.125rem;
  border-radius: var(--radius-md);
}

/* 主视觉区 (Hero Section) */
.hero {
  padding: 90px 0 70px 0;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 880px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--gradient-badge);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-size: 0.925rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.18;
  color: var(--color-text-primary);
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.hero-title .text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-features-bar {
  display: flex;
  justify-content: center;
  gap: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--color-card-border);
  flex-wrap: wrap;
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.hero-feature-item svg {
  color: var(--color-secondary);
  width: 20px;
  height: 20px;
}

/* 核心优势卡片 (3 Cards) */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--color-card-border-glow);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--color-primary-light);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.card-desc {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 流媒体与 AI 支持图卡 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.support-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.support-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-card-border);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.support-tag svg {
  width: 16px;
  height: 16px;
  color: var(--color-secondary);
}

/* 套餐价格对比表 */
.pricing-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.pricing-table caption {
  font-size: 1rem;
  color: var(--color-text-muted);
  text-align: left;
  margin-bottom: 16px;
}

.pricing-table th,
.pricing-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-card-border);
}

.pricing-table thead th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 1rem;
}

.pricing-table tbody tr:hover {
  background: rgba(99, 102, 241, 0.05);
}

.plan-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-hot {
  font-size: 0.75rem;
  background: var(--color-accent);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.plan-price {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-primary-light);
}
.plan-price small {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* 用户评价 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 12px;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.925rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-badge);
  border: 1px solid rgba(6, 182, 212, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-secondary);
}

.author-info h4 {
  font-size: 0.95rem;
  color: var(--color-text-primary);
}
.author-info p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* FAQ 常见问题 (默认展开原生 details/summary) */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item[open] {
  border-color: rgba(99, 102, 241, 0.4);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-primary-light);
  transition: transform 0.25s ease;
}
.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 22px 24px;
  color: var(--color-text-secondary);
  font-size: 0.975rem;
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}
.faq-answer a {
  text-decoration: underline;
}

/* 页脚 (只保留 网站地图、关于我们、服务条款、隐私政策 四个标题) */
.site-footer {
  background: #060910;
  border-top: 1px solid var(--color-card-border);
  padding: 50px 0 30px 0;
  margin-top: auto;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}
.footer-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.footer-bottom p {
  margin-bottom: 6px;
}

/* 科普列表与文章内容页排版 */
.article-header {
  padding: 60px 0 30px 0;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.article-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.article-body {
  max-width: 820px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-card-border);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 24px 0 12px 0;
}

.article-body p {
  margin-bottom: 18px;
  color: var(--color-text-secondary);
}

.article-body ul, .article-body ol {
  margin: 0 0 20px 24px;
  color: var(--color-text-secondary);
}

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

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--color-text-secondary);
}

.article-cta-box {
  margin: 40px 0;
  padding: 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid rgba(99, 102, 241, 0.35);
  text-align: center;
}

/* 知识科普列表页网格 */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.knowledge-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.knowledge-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-card-border-glow);
}

.knowledge-card-tag {
  font-size: 0.8rem;
  color: var(--color-secondary);
  font-weight: 600;
  margin-bottom: 10px;
}

.knowledge-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.knowledge-card-desc {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.knowledge-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--color-card-border);
  font-size: 0.85rem;
}

/* 响应式媒体查询适配 (严格遵循 @media 移动端单栏与触摸规范) */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 110px;
  }

  .site-header {
    height: auto;
    padding: 10px 0 6px 0;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 8px;
  }

  .site-nav {
    display: flex;
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 16px;
    padding: 6px 0 4px 0;
    scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    white-space: nowrap;
    font-size: 0.9rem;
    padding: 8px 4px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .section {
    padding: 50px 0;
  }

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

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

  .grid-3, .grid-2, .knowledge-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }

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

  .pricing-wrapper {
    padding: 16px 12px;
  }

  .article-body {
    padding: 24px 18px;
  }

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

/* 动效适配 */
@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;
  }
}