/* ===================================================================
   流量光 (liuliangguang) - 极简高性能纯原生 CSS 样式表
   无外部框架，无多余依赖，保障秒开与极致流畅体验
   =================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-card: #151b29;
  --bg-card-hover: #1c2436;
  --border-color: #232d42;
  --border-focus: #00d2ff;
  
  --text-primary: #f0f4fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-cyan: #00d2ff;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #00d2ff 0%, #3b82f6 50%, #8b5cf6 100%);
  --accent-glow: 0 0 25px rgba(0, 210, 255, 0.35);
  
  --success: #10b981;
  --warning: #f59e0b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

/* 全局重置与排版规范 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

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

/* 渐变与强调文本 */
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 按钮规范 (满足移动端无障碍触控) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 28px;
  min-height: 48px;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 210, 255, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 18px;
  min-height: 38px;
  font-size: 0.9rem;
}

/* 顶部导航栏 */
.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 rgba(35, 45, 66, 0.6);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
}

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

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

.nav-links a:hover {
  color: var(--accent-cyan);
}

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

.hero-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 350px;
  background: radial-gradient(circle, rgba(0, 210, 255, 0.15) 0%, rgba(139, 92, 246, 0.08) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.3);
  color: var(--accent-cyan);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

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

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
  background: rgba(17, 22, 34, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.stat-item h4 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 通用 Section 标题规范 */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.section-label {
  display: inline-block;
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

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

.section-padding {
  padding: 90px 0;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 210, 255, 0.5);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(0, 210, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* 流媒体与 AI 支持专区 */
.service-support-section {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.support-category {
  margin-bottom: 40px;
}

.category-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.category-title svg {
  color: var(--accent-cyan);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.support-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
}

.support-item:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.support-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.support-info h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.support-info span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.tag-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  margin-left: 6px;
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 28, 48, 0.95) 0%, var(--bg-card) 100%);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 35px rgba(0, 210, 255, 0.18);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-5px);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(0, 210, 255, 0.4);
}

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

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

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  min-height: 42px;
}

.plan-price {
  margin: 18px 0 6px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
}

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

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

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-features li.highlight {
  color: var(--text-primary);
  font-weight: 600;
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

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

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

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-cyan);
  border: 1px solid var(--border-color);
}

.user-meta h4 {
  font-size: 1rem;
  font-weight: 600;
}

.user-meta span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stars {
  display: flex;
  gap: 3px;
  color: #fbbf24;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 常见问题 (FAQ 原生无 JS 伸缩实现) */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(0, 210, 255, 0.4);
}

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

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

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--text-secondary);
}

.faq-item details[open] summary .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.faq-item details[open] .faq-content {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* 底部 CTA 通栏 */
.bottom-cta-banner {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

.bottom-cta-banner h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 14px;
}

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

/* 页脚 - 严格仅保留四个指定标题并新标签页打开 */
.footer {
  background: #07090e;
  border-top: 1px solid var(--border-color);
  padding: 40px 0 30px;
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 32px;
  list-style: none;
  margin-bottom: 24px;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 10px;
}

.footer-nav a:hover {
  color: var(--accent-cyan);
}

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

/* 独立内容页通用样式 (关于我们/条款/隐私/网站地图) */
.page-header {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(180deg, rgba(0, 210, 255, 0.05) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}

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

.page-content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin: 40px auto 80px;
  max-width: 900px;
  line-height: 1.8;
}

.page-content-box h2 {
  font-size: 1.45rem;
  margin: 28px 0 12px;
  color: var(--accent-cyan);
  border-left: 4px solid var(--accent-cyan);
  padding-left: 12px;
}

.page-content-box h2:first-child {
  margin-top: 0;
}

.page-content-box p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.page-content-box ul {
  color: var(--text-secondary);
  margin: 0 0 20px 24px;
}

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

/* 网站地图与高科技文章网格通用卡片样式 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 20px;
}

/* 高科技网格卡片 (Grid Cards) - 12篇 SEO 文章专栏 */
.article-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 50px 0 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.article-section-title h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  border-left: none;
  padding-left: 0;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 210, 255, 0.45);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

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

.article-card-header {
  margin-bottom: 14px;
}

.article-card-tag {
  display: inline-block;
  background: rgba(0, 210, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 210, 255, 0.25);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}

.article-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: 10px;
  transition: var(--transition);
}

.article-card:hover .article-card-title {
  color: var(--accent-cyan);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

.article-read-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent-cyan);
  font-weight: 600;
}

.article-read-btn:hover {
  text-decoration: underline;
}

/* 单篇文章内容专属布局 */
.article-content-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--accent-cyan);
  border-left: 4px solid var(--accent-cyan);
  padding-left: 12px;
}

.article-content-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: #f1f5f9;
}

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

.article-content-body ul, .article-content-body ol {
  margin: 0 0 24px 28px;
}

.article-content-body li {
  margin-bottom: 10px;
}

.article-content-body a {
  color: var(--accent-cyan);
  text-decoration: underline;
  font-weight: 600;
}

.article-content-body a:hover {
  color: #60a5fa;
}

.article-pbn-box {
  background: rgba(0, 210, 255, 0.05);
  border: 1px solid rgba(0, 210, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 30px 0;
}

.article-single-back-wrapper {
  margin: 40px 0 20px;
  text-align: center;
}

.sitemap-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-card h3 {
  font-size: 1.15rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}

.sitemap-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sitemap-card li {
  margin-bottom: 10px;
}

.sitemap-card a {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sitemap-card a:hover {
  color: var(--accent-cyan);
  text-decoration: underline;
}

/* ===================================================================
   响应式适配 (原生媒体查询 @media)
   确保移动端完美的单栏自适应与触控体验
   =================================================================== */

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    height: auto;
    padding: 12px 0 8px;
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .nav-links {
    display: flex;
    order: 3;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    gap: 18px;
    padding: 8px 4px 4px;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .hero-section {
    padding: 50px 0 40px;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .support-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .section-padding {
    padding: 60px 0;
  }

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

  .footer-nav a {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    width: 200px;
    text-align: center;
  }

  .page-content-box {
    padding: 24px 18px;
    margin: 20px auto 50px;
  }

  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
}