/* ==========================================================================
   速云梯官网 (suyunti.click) - 全站原生样式表
   设计准则：极致轻量、零外部依赖、响应式自适应、高无障碍标准 (WCAG 2.1 AA)
   ========================================================================== */

:root {
  /* 品牌双主色盘：荧光青蓝 (Cyan #00f3ff) & 激光洋红 (Magenta #ff007f) */
  --cyan: #00f3ff;
  --cyan-glow: rgba(0, 243, 255, 0.35);
  --cyan-hover: #38bdf8;
  
  --magenta: #ff007f;
  --magenta-glow: rgba(255, 0, 127, 0.35);
  --magenta-hover: #ff2a85;

  /* 核心主色与渐变系统 */
  --primary: #00f3ff;
  --primary-hover: #38bdf8;
  --primary-gradient: linear-gradient(135deg, #00f3ff 0%, #ec4899 50%, #ff007f 100%);
  --secondary-gradient: linear-gradient(135deg, #ff007f 0%, #ec4899 50%, #00f3ff 100%);
  --accent: #00f3ff;
  --accent-secondary: #ff007f;
  --accent-glow: rgba(0, 243, 255, 0.3);
  --success: #10b981;
  --warning: #f59e0b;
  
  /* 中性色 & 背景色 (赛博深邃暗夜) */
  --bg-main: #070b14;
  --bg-card: #0f1626;
  --bg-card-hover: #162035;
  --bg-subtle: #19243d;
  --border-color: rgba(56, 189, 248, 0.18);
  --border-focus: #00f3ff;

  /* 文字颜色 (对比度 >= 4.5:1) */
  --text-primary: #f9fafb;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #070b14;

  /* 布局与间距 */
  --container-max: 1200px;
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(0, 243, 255, 0.35);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* 全局重置与基础规范 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* 键盘可访问性：跳过导航链接 */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--primary);
  color: #fff;
  padding: 12px 20px;
  z-index: 9999;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
  text-decoration: none;
}
.skip-link:focus {
  top: 15px;
  outline: 3px solid #fff;
}

/* 锚点偏移处理（防止被固定顶栏遮挡） */
h1, h2, h3, h4, section, article {
  scroll-margin-top: calc(var(--nav-height) + 24px);
}

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

/* 链接与按钮通用 */
a {
  color: var(--cyan);
  text-decoration: none;
  transition: all 0.2s ease;
}
a:hover {
  color: var(--magenta);
  text-decoration: underline;
  text-shadow: 0 0 10px rgba(255, 0, 127, 0.4);
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 3px;
}

/* CTA 按钮标准（最小触摸区域 >= 44x44px） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 44px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-md);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 18px rgba(0, 243, 255, 0.35), 0 0 25px rgba(255, 0, 127, 0.3);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}
.btn-primary:hover {
  background: var(--secondary-gradient);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 0, 127, 0.5), 0 0 35px rgba(0, 243, 255, 0.45);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--cyan);
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.25);
  color: var(--cyan);
  text-decoration: none;
}
.btn-block {
  display: flex;
  width: 100%;
}

/* 徽标与标签 */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 9999px;
  background: rgba(0, 243, 255, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(0, 243, 255, 0.35);
  margin-bottom: 12px;
  white-space: nowrap;
}
.badge-hot {
  background: linear-gradient(135deg, rgba(255, 0, 127, 0.28) 0%, rgba(245, 158, 11, 0.28) 100%);
  color: #ff3399;
  border: 1px solid rgba(255, 0, 127, 0.65);
  box-shadow: 0 0 14px rgba(255, 0, 127, 0.4);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.3;
  vertical-align: middle;
}

/* ==========================================================================
   页眉导航 (Header & Nav)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}
.brand-logo svg, .brand-logo img {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
}
.brand-logo:hover {
  text-decoration: none;
}
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 24px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 4px;
  position: relative;
  transition: color 0.2s ease;
}
.nav-link:hover, .nav-link.active {
  color: #ffffff;
  text-decoration: none;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ==========================================================================
   Hero 主视觉区 (醒目独一无二文案)
   ========================================================================== */
.hero-section {
  padding: 120px 0 90px;
  position: relative;
  text-align: center;
  background-color: var(--bg-main);
  background-image: 
    linear-gradient(180deg, rgba(11, 15, 25, 0.82) 0%, rgba(11, 15, 25, 0.52) 35%, rgba(11, 15, 25, 0.82) 75%, #0b0f19 100%),
    url('hero-bg.jpg');
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  overflow: hidden;
}
.hero-content {
  max-width: 860px;
  margin: 0 auto;
}
.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.95), 0 4px 25px rgba(0, 0, 0, 0.9);
}
.hero-title-highlight {
  color: #00f3ff;
  text-shadow: 
    0 0 10px rgba(0, 243, 255, 0.9),
    0 0 25px rgba(0, 243, 255, 0.7),
    0 0 45px rgba(2, 132, 199, 0.6),
    0 2px 6px rgba(0, 0, 0, 0.95);
  display: inline-block;
  font-weight: 900;
}
.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: #e2e8f0;
  line-height: 1.7;
  margin-bottom: 36px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.85);
}
.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(55, 65, 81, 0.5);
  padding-top: 24px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--success);
}

/* ==========================================================================
   功能区块通用标题与网格
   ========================================================================== */
.section {
  padding: 70px 0;
}
.section-alt {
  background-color: rgba(17, 24, 39, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* 核心优势卡片（3个图文卡片） */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 25px rgba(0, 243, 255, 0.3);
}
.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 243, 255, 0.15) 0%, rgba(255, 0, 127, 0.15) 100%);
  border: 1px solid rgba(0, 243, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--cyan);
  transition: all 0.3s ease;
}
.feature-card:hover .feature-icon-wrapper {
  color: var(--magenta);
  border-color: var(--magenta);
  box-shadow: 0 0 16px rgba(255, 0, 127, 0.45);
}
.feature-icon-wrapper svg {
  width: 28px;
  height: 28px;
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 流媒体与 AI 支持图卡 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}
.media-ai-card:first-child {
  border-color: rgba(0, 243, 255, 0.35);
}
.media-ai-card:first-child:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-card), 0 0 25px rgba(0, 243, 255, 0.35);
}
.media-ai-card:last-child {
  border-color: rgba(255, 0, 127, 0.35);
}
.media-ai-card:last-child:hover {
  border-color: var(--magenta);
  box-shadow: var(--shadow-card), 0 0 25px rgba(255, 0, 127, 0.35);
}
.media-ai-card h3 {
  font-size: 1.35rem;
  color: #ffffff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.service-pill {
  padding: 6px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  background: var(--bg-subtle);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: border-color 0.2s ease;
}
.service-pill:hover {
  border-color: var(--cyan);
}
.service-pill svg {
  width: 14px;
  height: 14px;
  color: var(--cyan);
}
.media-ai-card:last-child .service-pill svg {
  color: var(--magenta);
}

/* ==========================================================================
   套餐价格 2x2 网格卡片 (2x2 Pricing Grid)
   ========================================================================== */
.pricing-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1040px;
  margin: 0 auto;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.pricing-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 25px rgba(0, 243, 255, 0.3);
}
.pricing-card.featured {
  border-color: var(--magenta);
  background: linear-gradient(180deg, rgba(255, 0, 127, 0.14) 0%, rgba(0, 243, 255, 0.04) 50%, rgba(15, 22, 38, 0.98) 100%);
  box-shadow: 0 0 30px rgba(255, 0, 127, 0.3), 0 0 45px rgba(0, 243, 255, 0.15);
  position: relative;
}
.pricing-card.featured:hover {
  border-color: #ff3399;
  box-shadow: 0 0 40px rgba(255, 0, 127, 0.5), 0 0 50px rgba(0, 243, 255, 0.3);
}
.pricing-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.pricing-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-card-price {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 8px;
}
.pricing-card.featured .pricing-card-price {
  color: #ff3399;
  text-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
}
.pricing-card-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}
.pricing-card-traffic {
  font-size: 0.95rem;
  color: var(--cyan-hover);
  font-weight: 600;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}
.pricing-card.featured .pricing-card-traffic {
  color: #f472b6;
}
.pricing-features-list {
  list-style: none;
  margin: 0 0 32px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}
.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.pricing-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}
.pricing-card .btn {
  width: 100%;
}

/* ==========================================================================
   用户真实评价区
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}
.reviewer-info h4 {
  font-size: 0.95rem;
  color: #ffffff;
}
.reviewer-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.review-stars {
  color: #fbbf24;
  margin-bottom: 12px;
  font-size: 0.875rem;
  letter-spacing: 2px;
}
.review-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ 常见问题（默认展开、语义原生 details/summary）
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item:hover {
  border-color: rgba(0, 243, 255, 0.45);
  box-shadow: 0 0 16px rgba(0, 243, 255, 0.15);
}
.faq-item summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "▼";
  font-size: 0.8rem;
  color: var(--cyan);
  transition: transform 0.2s ease, color 0.2s ease;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--magenta);
}
.faq-content {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid rgba(55, 65, 81, 0.4);
  padding-top: 16px;
}

/* ==========================================================================
   页脚规范 (只保留4个标题，新页面打开)
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: #05080f;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
}
.footer-links-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.footer-link-item {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
}
.footer-link-item:hover {
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0, 243, 255, 0.6);
  text-decoration: none;
}
.footer-copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 24px;
  border-top: 1px solid rgba(55, 65, 81, 0.4);
}

/* ==========================================================================
   文章与科普页面特有布局 (Article & Knowledge Pages)
   ========================================================================== */
.article-header {
  padding: 50px 0 30px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}
.article-header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.article-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.article-body {
  max-width: 820px;
  margin: 0 auto;
  color: #d1d5db;
  font-size: 1.05rem;
  line-height: 1.85;
}
.article-body h2 {
  font-size: 1.5rem;
  color: #ffffff;
  margin: 36px 0 16px;
  border-left: 4px solid var(--cyan);
  padding-left: 12px;
  text-shadow: 0 0 15px rgba(0, 243, 255, 0.3);
}
.article-body h3 {
  font-size: 1.25rem;
  color: #f3f4f6;
  margin: 24px 0 12px;
}
.article-body p {
  margin-bottom: 20px;
}
.article-body ul, .article-body ol {
  margin: 0 0 24px 28px;
}
.article-body li {
  margin-bottom: 8px;
}
.article-body strong {
  color: #ffffff;
}
.article-callout {
  background: rgba(255, 0, 127, 0.05);
  border-left: 4px solid var(--magenta);
  box-shadow: 0 0 20px rgba(255, 0, 127, 0.1);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 30px 0;
}
.article-callout p:last-child {
  margin-bottom: 0;
}
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 50px;
}
.knowledge-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.knowledge-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.25);
}
.knowledge-card h3 {
  font-size: 1.2rem;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.4;
}
.knowledge-card p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* ==========================================================================
   移动端与响应式适配 (@media 规范覆盖 360, 390, 768, 1440)
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid, .reviews-grid, .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
  .site-header .container {
    padding-left: 14px;
    padding-right: 14px;
  }
  .nav-menu {
    gap: 12px;
  }
  .nav-link {
    font-size: 0.875rem;
    padding: 6px 4px;
  }
  .hero-section {
    padding: 50px 0 40px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .features-grid, .media-ai-grid, .reviews-grid, .knowledge-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .pricing-grid-2x2 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .footer-links-container {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 390px) {
  .brand-logo span {
    font-size: 1.05rem;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .section-title {
    font-size: 1.45rem;
  }
  .feature-card, .media-ai-card {
    padding: 24px 18px;
  }
}