/* ===================================================================
   极速云 (Jisuyun) - 官方极简高效原生样式表
   零外部依赖 | 纯原生CSS | 毫秒级秒开 | 移动端自适应
   =================================================================== */

:root {
  --bg-main: #0a0d14;
  --bg-card: rgba(20, 26, 42, 0.7);
  --bg-card-hover: rgba(28, 36, 58, 0.85);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-border-glow: rgba(59, 130, 246, 0.3);
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.4);
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-emerald: #10b981;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --container-max: 1160px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景光效与微网格 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: 
    radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

img, svg {
  display: inline-block;
  vertical-align: middle;
}

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

/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--bg-card-border);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: #fff;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: 1px solid transparent;
  min-height: 48px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2563eb);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4f91fd, #1d4ed8);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-full);
  color: #93c5fd;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  color: #ffffff;
}

.gradient-text {
  background: linear-gradient(135deg, #60a5fa 10%, #a78bfa 60%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 920px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid var(--bg-card-border);
}

.stat-item {
  padding: 12px;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 公共板块标题 */
.section {
  padding: 80px 0;
}

.section-alt {
  background: rgba(16, 22, 38, 0.4);
  border-top: 1px solid var(--bg-card-border);
  border-bottom: 1px solid var(--bg-card-border);
}

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

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1rem;
}

/* 核心优势卡片网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s ease;
  position: relative;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--bg-card-border-glow);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #60a5fa;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与 AI 支持专区 */
.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-box {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.showcase-box::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.showcase-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.showcase-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
}

.showcase-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.chips-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: #e5e7eb;
  transition: all 0.2s ease;
}

.chip:hover {
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.4);
  color: #93c5fd;
  transform: translateY(-2px);
}

.chip-tag {
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  font-weight: 700;
}

/* 套餐价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.pricing-card:hover {
  border-color: var(--bg-card-border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.pricing-featured {
  background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.25) 0%, transparent 60%),
              linear-gradient(180deg, rgba(28, 41, 75, 0.95) 0%, rgba(14, 20, 36, 0.98) 100%);
  border: 2px solid #3b82f6;
  box-shadow: 0 0 45px rgba(59, 130, 246, 0.35), 0 20px 40px -10px rgba(0, 0, 0, 0.6);
  transform: scale(1.04);
  z-index: 2;
  position: relative;
}

.pricing-featured:hover {
  transform: scale(1.04) translateY(-6px);
  border-color: #60a5fa;
  box-shadow: 0 0 55px rgba(59, 130, 246, 0.5), 0 24px 45px -10px rgba(0, 0, 0, 0.7);
}

.featured-ribbon {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #ef4444, #f59e0b);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 18px rgba(239, 68, 68, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.badge-saving {
  font-size: 0.75rem;
  font-weight: 700;
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.18);
  border: 1px solid rgba(239, 68, 68, 0.35);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.price-original {
  font-size: 1rem;
  color: var(--text-dim);
  text-decoration: line-through;
  margin-left: 8px;
}

.featured-social-proof {
  background: rgba(59, 130, 246, 0.12);
  border: 1px dashed rgba(59, 130, 246, 0.35);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.85rem;
  color: #93c5fd;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-featured-cta {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #3b82f6, #2563eb 60%, #1d4ed8);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-featured-cta:hover {
  background: linear-gradient(135deg, #60a5fa, #3b82f6 60%, #2563eb);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.7);
  transform: translateY(-2px);
}

.plan-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--bg-card-border);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: #d1d5db;
}

.plan-feature-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--accent-emerald);
}

/* 常见问题解答 (FAQ) - 原生 details 极简无 JS */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.faq-item[open] {
  border-color: var(--bg-card-border-glow);
  background: var(--bg-card-hover);
}

.faq-question {
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  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(--text-muted);
  transition: transform 0.25s ease;
}

.faq-item[open] .faq-question::after {
  content: "−";
  color: var(--primary);
}

.faq-answer {
  padding: 0 22px 20px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 用户评价 (User Reviews) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: #e5e7eb;
  line-height: 1.65;
  margin-bottom: 22px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--bg-card-border);
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
}

.user-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
}

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

/* 转化引导横幅 (Bottom CTA) */
.cta-banner {
  margin: 60px auto 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  backdrop-filter: blur(16px);
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.cta-banner p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 28px;
}

/* 页脚 (Footer) - 严格遵循用户指令：仅保留四个标题，在新页面打开 */
.footer {
  border-top: 1px solid var(--bg-card-border);
  padding: 40px 0 30px;
  background: rgba(8, 10, 16, 0.95);
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s ease;
  position: relative;
  padding: 6px 10px;
}

.footer-link:hover {
  color: #60a5fa;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* 法律与详情子页面通用排版 */
.doc-page {
  padding: 60px 0 100px;
}

.doc-box {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 860px;
  margin: 0 auto;
  backdrop-filter: blur(12px);
}

.doc-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--bg-card-border);
}

.doc-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.doc-meta {
  font-size: 0.88rem;
  color: var(--text-dim);
}

.doc-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin: 32px 0 14px;
}

.doc-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #93c5fd;
  margin: 20px 0 10px;
}

.doc-content p, .doc-content li {
  font-size: 0.98rem;
  color: #d1d5db;
  line-height: 1.75;
  margin-bottom: 14px;
}

.doc-content ul {
  padding-left: 24px;
  margin-bottom: 20px;
}

.doc-content li {
  margin-bottom: 8px;
}

.doc-highlight-box {
  background: rgba(59, 130, 246, 0.1);
  border-left: 4px solid var(--primary);
  padding: 18px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.doc-highlight-box p {
  margin-bottom: 0;
  color: #bfdbfe;
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏并适配触摸
   =================================================================== */

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-featured {
    transform: none;
  }
  .pricing-featured:hover {
    transform: translateY(-6px);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 14px 0;
  }
  .nav-links {
    display: none; /* 移动端精简，突出行动按钮 */
  }
  .hero {
    padding: 50px 0 40px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .section {
    padding: 50px 0;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .media-ai-container {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .doc-box {
    padding: 28px 20px;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .showcase-box {
    padding: 24px 18px;
  }
  .pricing-card {
    padding: 28px 20px;
  }
  .btn {
    padding: 14px 20px;
    font-size: 1rem;
  }
}