/* ==========================================================================
   极速云 (Jisuyun) - 官方优雅现代浅色版原生样式表
   0 外部依赖 | 纯原生 CSS | 现代纯净 SaaS 浅色风格 | 秒开响应式架构
   ========================================================================== */

:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-glow: rgba(37, 99, 235, 0.22);
  --accent-cyan: #0284c7;
  --accent-purple: #7c3aed;
  --accent-green: #059669;
  --accent-amber: #d97706;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-sub: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08);
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 12% 18%, rgba(37, 99, 235, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 88% 55%, rgba(124, 58, 237, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 50% 95%, rgba(2, 132, 199, 0.04) 0%, transparent 50%);
  background-attachment: fixed;
}

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

img, svg {
  vertical-align: middle;
}

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

/* 徽章与标签 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
  box-shadow: var(--shadow-sm);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px rgba(5, 150, 105, 0.5);
}

/* 渐变标题 */
.gradient-text {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-alt {
  background: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #1e293b;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  display: flex;
}

/* 导航栏 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.02);
  transition: var(--transition-smooth);
}

.nav-wrap {
  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;
  color: #0f172a;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #2563eb, #0284c7);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.logo-icon-img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.32);
  vertical-align: middle;
  transition: var(--transition-smooth);
}

.logo:hover .logo-icon-img {
  transform: scale(1.06);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.45);
}

.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: 600;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

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

.hero-content {
  max-width: 860px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 24px 0;
  letter-spacing: -1.2px;
  color: #0f172a;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 720px;
  margin: 0 auto 36px;
}

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

/* 信任指标 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

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

.metric-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* 主视觉区核心科技大图 (极速云塔台) */
.hero-image-wrap {
  margin: 40px auto 28px;
  max-width: 920px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.1);
  position: relative;
  background: #0f172a;
  transition: var(--transition-smooth);
}

.hero-image-wrap:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: 0 24px 60px rgba(37, 99, 235, 0.18);
}

.hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.hero-image-caption {
  position: absolute;
  bottom: 16px;
  left: 20px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  color: #f8fafc;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.caption-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #06b6d4;
  box-shadow: 0 0 10px #06b6d4;
}

/* 状态仪表盘模拟卡片 */
.status-card {
  margin: 32px auto 0;
  max-width: 900px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 30px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.status-node-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.status-node {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
}

.ping-tag {
  color: var(--accent-green);
  font-weight: 700;
  font-size: 0.82rem;
}

/* 分区通用排版 */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.6px;
  margin-bottom: 14px;
  color: #0f172a;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

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

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #0284c7);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  border-color: #93c5fd;
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.icon-blue { background: #eff6ff; color: #2563eb; }
.icon-cyan { background: #f0f9ff; color: #0284c7; }
.icon-purple { background: #faf5ff; color: #7c3aed; }
.icon-green { background: #ecfdf5; color: #059669; }
.icon-amber { background: #fffbeb; color: #d97706; }
.icon-rose { background: #fff1f2; color: #e11d48; }

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #0f172a;
}

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

/* 流媒体与 AI 支持专区 */
.unlock-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.unlock-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.unlock-box-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.unlock-box-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #0f172a;
}

.unlock-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 24px;
}

.unlock-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: #1e293b;
}

.tag-dot-green {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
}

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

.unlock-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.unlock-checklist svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--primary);
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: #94a3b8;
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
  border: 2px solid #2563eb;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.16);
}

.featured-ribbon {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #2563eb, #0284c7);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #0f172a;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 40px;
  margin-bottom: 18px;
}

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

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: #0f172a;
}

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

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

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: #334155;
}

.plan-features li svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

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

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

.review-stars {
  color: var(--accent-amber);
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.68;
  margin-bottom: 20px;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #eff6ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  border: 1px solid #bfdbfe;
}

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

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

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

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

.faq-item[open] {
  border-color: #93c5fd;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f172a;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: var(--transition-smooth);
}

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

.faq-arrow {
  transition: transform 0.25s ease;
  color: var(--primary);
}

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

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}

/* 页脚规范：只保留四个标题，打开新页面展示 */
.footer {
  border-top: 1px solid var(--border-color);
  background: #ffffff;
  padding: 60px 0 40px;
  margin-top: 60px;
}

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

.footer-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: #334155;
  position: relative;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: var(--primary);
  background: #f1f5f9;
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-top: 20px;
}

/* 子页面独立排版专用（关于我们、条款、隐私、地图） */
.subpage-container {
  max-width: 860px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

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

.subpage-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #0f172a;
}

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

.subpage-article {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  color: #334155;
  line-height: 1.8;
}

.subpage-article h2 {
  font-size: 1.4rem;
  color: #0f172a;
  margin: 32px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}

.subpage-article h2:first-of-type {
  margin-top: 0;
}

.subpage-article p {
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.subpage-article ul, .subpage-article ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

.sitemap-group {
  margin-bottom: 28px;
}

.sitemap-group-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-list {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.sitemap-list a {
  display: block;
  padding: 14px 18px;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #1e293b;
  transition: var(--transition-smooth);
}

.sitemap-list a:hover {
  background: #eff6ff;
  border-color: #93c5fd;
  color: var(--primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏与大触控按钮
   ========================================================================== */

@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
    letter-spacing: -0.5px;
  }
  
  .hero-subtitle {
    font-size: 1.02rem;
    margin-bottom: 28px;
  }
  
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 16px;
  }
  
  .metric-number {
    font-size: 1.55rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .unlock-wrapper {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .sitemap-list {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    min-height: 48px;
    font-size: 1.05rem;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }
  
  .subpage-article {
    padding: 24px 18px;
  }
  
  .status-card {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .hero-image-caption {
    font-size: 0.76rem;
    padding: 4px 12px;
    bottom: 10px;
    left: 10px;
  }
}

/* ==========================================================================
   高科技 SEO 文章网格卡片 (Grid Cards)
   ========================================================================== */
.seo-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 28px 0 36px;
}

.seo-card {
  background: #ffffff;
  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-smooth);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.seo-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #0284c7);
  opacity: 0;
  transition: var(--transition-smooth);
}

.seo-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

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

.seo-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  width: fit-content;
}

.seo-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-main);
}

.seo-card-title a {
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.seo-card-title a:hover {
  color: var(--primary);
}

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

.seo-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #f1f5f9;
  font-size: 0.82rem;
  color: var(--text-sub);
}

.seo-card-link {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-smooth);
}

.seo-card-link:hover {
  color: #1d4ed8;
  transform: translateX(2px);
}

@media (max-width: 1080px) {
  .seo-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .seo-articles-grid {
    grid-template-columns: 1fr;
  }
}