/* ==========================================================================
   红杏云 (hongxin-yun.homes) - 官方极简高性能纯原生CSS样式表
   零重型框架依赖 · 秒开级加载 · 移动优先完美响应式
   ========================================================================== */

:root {
  --bg-main: #0a0d14;
  --bg-secondary: #0f1420;
  --bg-card: #151b29;
  --bg-card-hover: #1c2436;
  --bg-card-subtle: rgba(255, 255, 255, 0.03);
  
  --accent-red: #ff334b;
  --accent-red-hover: #ff4d63;
  --accent-coral: #ff7675;
  --accent-glow: rgba(255, 51, 75, 0.35);
  --accent-gradient: linear-gradient(135deg, #ff334b 0%, #ff6b81 100%);
  --accent-gradient-alt: linear-gradient(135deg, #ff4757 0%, #ffa502 100%);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 51, 75, 0.5);
  --border-card: rgba(255, 255, 255, 0.06);
  
  --success: #10b981;
  --warning: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 30px rgba(255, 51, 75, 0.3);
  
  --container-width: 1240px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 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", "WenQuanYi Micro Hei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% -20%, rgba(255, 51, 75, 0.12) 0%, rgba(10, 13, 20, 0) 65%),
              var(--bg-main);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* 导航栏 */
.site-header {
  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(--border-light);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: 0 4px 15px rgba(255, 51, 75, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: block;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(255, 51, 75, 0.65);
}

.logo-badge {
  width: 38px;
  height: 38px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(255, 51, 75, 0.4);
}

.brand-tag {
  font-size: 0.7rem;
  background: rgba(255, 51, 75, 0.15);
  color: var(--accent-coral);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 51, 75, 0.3);
  font-weight: 600;
}

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

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

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

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

/* 通用按钮系统 (严格支持 rel="nofollow" target="_blank") */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 51, 75, 0.5);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

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

.btn-block {
  width: 100%;
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 51, 75, 0.08);
  border: 1px solid rgba(255, 51, 75, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--accent-coral);
  margin-bottom: 24px;
}

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

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 22px;
  letter-spacing: -0.025em;
}

.text-gradient {
  background: linear-gradient(135deg, #ff4d63 0%, #ff8597 50%, #ffa502 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  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: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid var(--border-light);
}

.metric-item {
  text-align: center;
}

.metric-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  display: block;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 核心特性与优势卡片 (3个图文卡片) */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

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

.section-tag {
  color: var(--accent-red);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 14px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(255, 51, 75, 0.1);
  border: 1px solid rgba(255, 51, 75, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-red);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.feature-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge-tag {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* 流媒体与 AI 支持图卡区 */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.unlock-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.unlock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.unlock-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.unlock-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.unlock-name {
  font-weight: 700;
  font-size: 1.05rem;
}

.status-pill {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.unlock-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}

.unlock-meta {
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 10px;
}

/* 价格对比表 (所有价格同排) */
.pricing-wrapper {
  margin-top: 20px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch; /* 确保所有套餐高度一致、同排呈现 */
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 51, 75, 0.4);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #1b2336 0%, #151b29 100%);
  border: 2px solid var(--accent-red);
  box-shadow: 0 10px 30px rgba(255, 51, 75, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(255, 51, 75, 0.4);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-height: 38px;
  margin-bottom: 20px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

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

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

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

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-feature-item {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-feature-item svg {
  flex-shrink: 0;
  color: var(--accent-red);
}

.plan-cta {
  margin-top: auto;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.review-stars {
  color: #f59e0b;
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  font-size: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-red);
}

.author-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

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

/* 常见问题解答 (纯原生details/summary 无JS) */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--accent-red);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* 推荐文章精选区 (SEO内链聚合) */
.articles-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.article-preview-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-tag {
  color: var(--accent-red);
  font-weight: 600;
  background: rgba(255, 51, 75, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.article-preview-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #ffffff;
}

.article-preview-title a:hover {
  color: var(--accent-coral);
}

.article-preview-snippet {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-coral);
  font-size: 0.9rem;
  font-weight: 600;
}

.article-read-more:hover {
  color: #ffffff;
}

/* 底部CTA横幅 */
.cta-banner {
  background: linear-gradient(135deg, rgba(255, 51, 75, 0.15) 0%, rgba(15, 20, 32, 0.9) 100%);
  border: 1px solid rgba(255, 51, 75, 0.3);
  border-radius: var(--radius-xl);
  padding: 50px 40px;
  text-align: center;
  margin: 40px 0;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
}

/* 页脚 (严格只保留四个标题: 网站地图, 关于我们, 服务条款, 隐私政策) */
.site-footer {
  margin-top: auto;
  background: #07090e;
  border-top: 1px solid var(--border-light);
  padding: 40px 0 30px;
}

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

.footer-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
}

/* ==========================================================================
   文章详情页专有样式 (支持 800-1500 字深度长文阅读)
   ========================================================================== */
.article-header {
  padding: 50px 0 30px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 40px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
}

.breadcrumbs a:hover {
  color: var(--accent-coral);
}

.article-main-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #f1f5f9;
  margin: 28px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
}

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

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

.article-content blockquote {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-red);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: #e2e8f0;
  font-style: italic;
}

.article-content strong {
  color: #ffffff;
  font-weight: 700;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 26px 0;
  font-size: 0.92rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid var(--border-card);
  text-align: left;
}

.article-content th {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  font-weight: 700;
}

.article-content td {
  color: var(--text-secondary);
}

.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #ffffff;
  border-left: 3px solid var(--accent-red);
  padding-left: 10px;
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: block;
}

.sidebar-links a:hover {
  color: var(--accent-coral);
}

.internal-link {
  color: var(--accent-coral);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

.internal-link:hover {
  color: #ffffff;
}

.article-keywords-box {
  margin-top: 40px;
  padding: 18px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.article-keywords-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-red);
}

.keyword-tag {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* 网站地图与关于页面专有样式 */
.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin: 40px 0 60px;
  line-height: 1.8;
}

.legal-card h2 {
  font-size: 1.5rem;
  color: #ffffff;
  margin: 30px 0 14px;
}

.legal-card h2:first-of-type {
  margin-top: 0;
}

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

.legal-card ul {
  margin: 0 0 20px 20px;
  color: var(--text-secondary);
}

/* ==========================================================================
   响应式断点适配 (移动端优先极致兼容)
   ========================================================================== */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unlock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding: 50px 0 40px;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .unlock-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .articles-preview-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none; /* 移动端精简模式，保持秒开与极致紧凑 */
  }
  .legal-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .footer-nav-container {
    gap: 16px;
    flex-direction: column;
  }
}