/* ==========================================================================
   筋斗云 (Jindouyun) - 纯原生极简高颜值响应式样式表 (现代明亮浅色风格)
   零外部框架，纯 CSS，极速秒开体验
   ========================================================================== */

:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border-color: #e2e8f0;
  --border-color-glow: rgba(79, 70, 229, 0.35);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent-primary: #4f46e5;
  --accent-secondary: #0284c7;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #0284c7 100%);
  --accent-glow: 0 6px 20px rgba(79, 70, 229, 0.25);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --container-width: 1200px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.09);
}

/* 基础重置 */
*, *::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;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* 顶部柔和微光装饰 */
body::before {
  content: "";
  position: fixed;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 450px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, rgba(2, 132, 199, 0.04) 50%, transparent 70%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 导航栏 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.03);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  flex-shrink: 0;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-name {
  background: linear-gradient(135deg, #0f172a 40%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  min-height: 44px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 22px rgba(79, 70, 229, 0.45);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-outline {
  background: #ffffff;
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

/* 标语标签 Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #4338ca;
  background: #e0e7ff;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* 主视觉区 (Hero) */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -1px;
  color: #0f172a;
}

.hero-highlight {
  background: linear-gradient(135deg, #4f46e5 0%, #0284c7 50%, #059669 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  max-width: 760px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

/* 状态概览指示卡片 */
.status-bar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  padding: 18px 36px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
}

.status-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #4f46e5;
}

.status-data {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0f172a;
}

.status-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 主视觉大图展示区 (Hero Showcase) */
.hero-showcase {
  max-width: 1060px;
  margin: 10px auto 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px -15px rgba(79, 70, 229, 0.16), 0 0 0 1px rgba(226, 232, 240, 0.8);
  background: #ffffff;
  padding: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-showcase:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px -12px rgba(79, 70, 229, 0.25), 0 0 0 1px #c7d2fe;
}

.hero-showcase-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius-xl) - 6px);
  object-fit: cover;
}

/* 统一区块标题 */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-tag {
  color: #4f46e5;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #0f172a;
}

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

/* 网格系统 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 卡片风格 */
.card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #4f46e5;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #0f172a;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 流媒体与 AI 支持专区 */
.media-ai-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-md);
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.service-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

.service-tag:hover {
  background: #eef2ff;
  border-color: #c7d2fe;
  color: #4338ca;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.check-icon {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 4px;
}

/* 价格对比表 */
.pricing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: var(--radius-lg);
  padding: 40px 30px 36px;
  background: #ffffff;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: visible;
}

.pricing-card.featured {
  border: 2px solid #4f46e5;
  background: linear-gradient(180deg, #f5f3ff 0%, #ffffff 100%);
  box-shadow: 0 12px 35px rgba(79, 70, 229, 0.16);
  transform: scale(1.03);
  position: relative;
  overflow: visible;
}

.pricing-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.4);
  white-space: nowrap;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.3px;
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #0f172a;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #4f46e5;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: #0f172a;
}

.price-period {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

/* 用户评价 */
.review-card {
  padding: 28px;
  background: #ffffff;
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 0.95rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #e0e7ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #4338ca;
  border: 1px solid #c7d2fe;
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
}

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

/* 常见问题 (FAQ) */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  color: #0f172a;
}

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

.faq-chevron {
  transition: transform 0.25s ease;
  color: var(--text-muted);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  color: #4f46e5;
}

.faq-item[open] {
  border-color: #c7d2fe;
  background: #f8fafc;
}

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* CTA 转化横幅 */
.cta-banner {
  margin: 60px 0 20px;
  padding: 60px 40px;
  background: radial-gradient(circle at 50% 50%, #e0e7ff 0%, #ffffff 100%);
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.cta-banner h2 {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #0f172a;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 30px;
}

/* 页脚 */
.footer {
  margin-top: auto;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 40px 0 35px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 36px;
  margin-bottom: 24px;
}

.footer-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 4px;
}

.footer-link:hover {
  color: #0f172a;
}

.footer-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.25s ease;
}

.footer-link:hover::after {
  width: 100%;
}

.footer-copy {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 内容页面样式（关于我们、服务条款、隐私政策、网站地图） */
.page-header {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 50px;
  background: #ffffff;
}

.page-title {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #0f172a;
}

.page-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

.article-content {
  max-width: 860px;
  margin: 0 auto 80px;
  line-height: 1.8;
}

.article-section {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
}

.article-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-section h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 20px 0 10px;
  color: #1e293b;
}

.article-section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.article-section ul {
  padding-left: 20px;
  margin-bottom: 16px;
  list-style: disc;
}

.article-section li {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.back-home-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

/* ==========================================================================
   响应式媒体查询 (@media) 保证移动端单栏且触控友好
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 16px;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
  
  .hero {
    padding: 40px 0;
  }
  
  .hero-title {
    font-size: 2.1rem;
    letter-spacing: normal;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  
  .hero-actions .btn {
    width: 100%;
  }

  .status-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 16px;
  }
  
  .status-item {
    justify-content: flex-start;
  }

  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .media-ai-box {
    padding: 24px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }

  .btn {
    min-height: 48px; /* 移动端拇指舒适点击区 */
    padding: 12px 20px;
  }

  .article-section {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .price-amount {
    font-size: 2.4rem;
  }
  .cta-banner {
    padding: 40px 20px;
  }
  .cta-banner h2 {
    font-size: 1.7rem;
  }
}