/* ===================================================================
   极速cloud机场 (jisu-cloud.site) - 纯原生轻量高性能样式表
   零重型外部依赖 | 秒开级加载 | 严格无障碍与高对比度规范
   =================================================================== */

:root {
  --color-bg-base: #0b0f19;
  --color-bg-surface: #111827;
  --color-bg-elevated: #1f2937;
  --color-bg-card: #151d30;
  --color-border: #243048;
  --color-border-hover: #38bdf8;
  
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-dark: #0f172a;
  
  --color-primary: #0284c7;
  --color-primary-hover: #0369a1;
  --color-accent: #38bdf8;
  --color-accent-alt: #818cf8;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  
  --container-max-width: 1200px;
  --header-height: 72px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

/* 锚点防遮挡 */
h1, h2, h3, h4, h5, h6, section, article {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

/* 无障碍跳转至主内容 */
.skip-link {
  position: absolute;
  top: -999px;
  left: 16px;
  background: var(--color-accent);
  color: var(--color-text-dark);
  padding: 12px 20px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid #ffffff;
}

/* 键盘焦点指示器 */
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

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

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  min-height: 44px;
}

.site-logo img {
  height: 40px;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 10px 8px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 10px 22px;
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.5);
  color: #ffffff;
}

/* 主视觉区 Hero */
.hero-section {
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 6px 14px;
  background-color: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 10px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 140px;
  padding: 12px 28px;
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.6);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 140px;
  padding: 12px 26px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--color-border);
  border-color: var(--color-accent);
}

.hero-guarantee {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-visual img {
  width: 100%;
  max-width: 560px;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(56, 189, 248, 0.25);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55), 0 0 35px rgba(56, 189, 248, 0.12);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.hero-visual img:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.65), 0 0 45px rgba(56, 189, 248, 0.25);
}

/* 通用区块头 */
.section {
  padding: 64px 0;
}

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

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: rgba(56, 189, 248, 0.12);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.feature-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon-wrapper img {
  width: 48px;
  height: 48px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* 套餐价格对比表 */
.pricing-table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

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

.pricing-table caption {
  caption-side: top;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

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

.pricing-table thead th {
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 0.95rem;
}

.pricing-table tbody tr:hover {
  background-color: rgba(56, 189, 248, 0.04);
}

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

.plan-name {
  font-weight: 700;
  color: var(--color-text-primary);
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-badge-hot {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: #ef4444;
  color: #ffffff;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.plan-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
}

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

.table-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 110px;
  padding: 8px 18px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.table-btn:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
}

/* 流媒体与 AI 支持图卡 */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.unlock-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.unlock-tag {
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
}

.tag-media { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.tag-ai { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.tag-game { background: rgba(129, 140, 248, 0.15); color: #818cf8; }
.tag-work { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }

.unlock-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.unlock-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.unlock-list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 用户真实评价 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.testimonial-rating {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #0284c7 0%, #818cf8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
}

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

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

/* 常见问题解答 FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

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

.faq-item[open] {
  border-color: rgba(56, 189, 248, 0.4);
}

.faq-question {
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  user-select: none;
}

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

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 4px;
  padding-top: 14px;
}

.faq-answer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* CTA 转换引导条 */
.cta-banner {
  background: linear-gradient(135deg, #0f2744 0%, #172554 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin: 40px 0;
}

.cta-banner h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: #ffffff;
}

.cta-banner p {
  max-width: 680px;
  font-size: 1.05rem;
  color: #cbd5e1;
}

/* 页脚：严格只保留 4 个跳转新页面的入口 */
.site-footer {
  margin-top: auto;
  background-color: #070a12;
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 36px;
  margin-bottom: 28px;
}

.footer-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 10px 14px;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  line-height: 1.6;
}

/* 文章与内容页专用排版样式 */
.content-layout {
  padding: 48px 0 80px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.breadcrumbs a {
  color: var(--color-accent);
  text-decoration: none;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.35;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #e2e8f0;
}

.article-body h2 {
  font-size: 1.55rem;
  color: var(--color-text-primary);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-body h3 {
  font-size: 1.25rem;
  color: var(--color-text-primary);
  margin: 28px 0 12px;
}

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

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

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

.article-body strong {
  color: #ffffff;
}

.article-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-callout {
  background-color: rgba(2, 132, 199, 0.08);
  border-left: 4px solid var(--color-accent);
  padding: 18px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  font-size: 0.98rem;
}

.article-faq {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.article-faq h3 {
  font-size: 1.35rem;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

/* 知识库卡片列表 */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.knowledge-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.knowledge-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.knowledge-card-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background-color: rgba(56, 189, 248, 0.12);
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 12px;
}

.knowledge-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.knowledge-card-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}

.knowledge-card-title a:hover {
  color: var(--color-accent);
}

.knowledge-card-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.knowledge-card-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* 移动端媒体查询适配 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }
  
  .hero-badge {
    align-self: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-guarantee {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .main-nav {
    gap: 12px;
  }
  
  .nav-link {
    font-size: 0.9rem;
    padding: 8px 6px;
  }
  
  .nav-cta {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
  
  .hero-section {
    padding: 40px 0;
  }
  
  .section {
    padding: 44px 0;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    min-width: unset;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: 0 12px;
  }
  
  .site-logo img {
    height: 32px;
  }
  
  .nav-link {
    font-size: 0.85rem;
  }
  
  .pricing-table-container {
    border-radius: var(--radius-md);
  }
}

/* 用户偏好减少动画 */
@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;
  }
}