/* ==========================================================================
   闪跃 (FlashLeap) 网络加速器 - 官方推广落地页全套原生样式表 (新潮高级商业黑金风 Black Gold Theme)
   特色：纯 CSS3，无依赖，极速加载，黑金奢华科技风，高级质感自适应响应式
   ========================================================================== */

/* 重置与变量定义 (新潮高级黑金 Mode) */
:root {
  --bg-body: #0B0C10;
  --bg-card: rgba(18, 19, 26, 0.85);
  --bg-card-hover: rgba(26, 28, 38, 0.95);
  --bg-subtle: #12131A;
  
  --border-color: rgba(212, 175, 55, 0.2);
  --border-glow: rgba(212, 175, 55, 0.55);
  
  --primary-gold: #D4AF37;
  --gold-light: #FCE895;
  --gold-dark: #AA771C;
  --accent-gold: #FFD700;
  
  --text-main: #F3F4F6;
  --text-muted: #A3A3A8;
  --text-dim: #6E6E73;
  --text-gold: #FCE895;
  
  --gradient-gold: linear-gradient(135deg, #FFF2B2 0%, #D4AF37 50%, #996515 100%);
  --gradient-gold-btn: linear-gradient(135deg, #FFE89C 0%, #D4AF37 50%, #A8761D 100%);
  --gradient-accent: linear-gradient(135deg, #FFE082 0%, #FFB300 100%);
  --gradient-glow: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(170, 119, 28, 0.05) 100%);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-glow: 0 10px 30px -5px rgba(212, 175, 55, 0.35);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --shadow-hover: 0 15px 35px -5px rgba(212, 175, 55, 0.25);

  --max-width: 1200px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-body);
  color: var(--text-main);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background: 
    radial-gradient(circle at 15% 15%, rgba(212, 175, 55, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 65%, rgba(255, 215, 0, 0.05) 0%, transparent 50%),
    var(--bg-body);
  min-height: 100vh;
}

/* 通用容器与工具类 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 20px rgba(212, 175, 55, 0.2);
}

.text-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section-title-wrap {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-full);
  color: var(--gold-light);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
}

/* 统一高级黑金精致按钮设计 (High-End Metallic Gold) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  font-size: 1.05rem;
  font-weight: 800;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  border: none;
  white-space: nowrap;
  letter-spacing: 0.5px;
  position: relative;
  z-index: 1;
}

.btn-primary {
  background: linear-gradient(135deg, #FFF6D1 0%, #E8BD56 45%, #B3821E 100%);
  color: #0D0E12;
  border: 1px solid rgba(255, 243, 191, 0.8);
  box-shadow: 
    inset 0 1px 1px rgba(255, 255, 255, 0.85),
    inset 0 -2px 4px rgba(0, 0, 0, 0.2),
    0 4px 18px rgba(212, 175, 55, 0.25);
  position: relative;
  overflow: hidden;
}

/* 奢华光芒扫过动画 (Shimmer Reflection) */
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.5),
    transparent
  );
  transform: skewX(-25deg);
  transition: all 0.65s ease;
  pointer-events: none;
}

.btn-primary:hover::before {
  left: 140%;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  background: linear-gradient(135deg, #FFFFFF 0%, #F5CE69 45%, #C29124 100%);
  border-color: #FFFFFF;
  box-shadow: 
    inset 0 1px 2px rgba(255, 255, 255, 0.95),
    inset 0 -2px 4px rgba(0, 0, 0, 0.15),
    0 8px 28px rgba(212, 175, 55, 0.45);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.99);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--gold-light);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(212, 175, 55, 0.12);
  border-color: var(--primary-gold);
  transform: translateY(-2px);
  color: #FFFFFF;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.2);
}

.btn-glow {
  animation: pulse-glow-gold-subtle 3.5s infinite ease-in-out alternate;
}

@keyframes pulse-glow-gold-subtle {
  0% {
    box-shadow: 
      inset 0 1px 1px rgba(255, 255, 255, 0.8),
      inset 0 -2px 4px rgba(0, 0, 0, 0.2),
      0 4px 14px rgba(212, 175, 55, 0.2);
  }
  100% {
    box-shadow: 
      inset 0 1px 1px rgba(255, 255, 255, 0.9),
      inset 0 -2px 4px rgba(0, 0, 0, 0.15),
      0 6px 24px rgba(255, 215, 0, 0.45);
  }
}

/* 顶部导航栏 (黑金 Glassmorphism) */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  transition: all 0.3s ease;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 900;
  color: #FFFFFF;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-gold-btn);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
  fill: #0A0B0E;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 主视觉 Hero 区域 */
.hero {
  padding: 80px 0 100px 0;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: var(--radius-full);
  color: var(--gold-light);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge-pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-gold);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-gold);
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: #FFFFFF;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 40px auto;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* Hero 特性数据网格 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-gold);
  box-shadow: var(--shadow-hover);
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 900;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* 核心优势网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

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

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  background: rgba(212, 175, 55, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--gold-light);
  border: 1px solid rgba(212, 175, 55, 0.25);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 流媒体与 AI 支持专区 */
.services-box {
  background: linear-gradient(180deg, rgba(18, 19, 26, 0.9) 0%, rgba(11, 12, 16, 0.98) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.service-category-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-tags-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.service-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(212, 175, 55, 0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.25s ease;
}

.service-item:hover {
  background: rgba(212, 175, 55, 0.08);
  border-color: rgba(212, 175, 55, 0.4);
  transform: translateY(-2px);
}

.service-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.service-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #FFFFFF;
}

.service-status {
  font-size: 0.75rem;
  color: var(--gold-light);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid rgba(212, 175, 55, 0.25);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: auto;
  font-weight: 600;
}

/* 套餐价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-gold);
  box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(212, 175, 55, 0.12) 0%, rgba(18, 19, 26, 0.95) 100%);
  border: 2px solid var(--primary-gold);
  box-shadow: 0 0 35px rgba(212, 175, 55, 0.3);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 28px;
  background: var(--gradient-gold-btn);
  color: #0A0B0E;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.4);
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold-light);
}

.price {
  font-size: 3rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 14px;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  fill: var(--primary-gold);
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* FAQ 常见问题 (原生 CSS/HTML details summary 黑金适配) */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-hover);
}

.faq-item details {
  width: 100%;
}

.faq-item summary {
  padding: 22px 28px;
  font-size: 1.1rem;
  font-weight: 700;
  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: 1.5rem;
  color: var(--gold-light);
  font-weight: 400;
  transition: transform 0.25s ease;
}

.faq-item details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 28px 24px 28px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(212, 175, 55, 0.08);
  margin-top: 4px;
  padding-top: 16px;
}

/* 用户评价区域 */
.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-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.stars {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 24px;
  font-style: italic;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-gold-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: #0A0B0E;
  font-size: 1rem;
  box-shadow: 0 2px 10px rgba(212, 175, 55, 0.4);
}

.reviewer-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

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

/* 页脚区域 (严格遵守规范：只保留四个标题，在新页面展示) */
.footer {
  background: #060709;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 35px 0;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold-light);
  text-decoration: none;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}

.footer-nav-link:hover {
  color: #FFFFFF;
  border-color: var(--primary-gold);
  background: rgba(212, 175, 55, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.2);
}

.copyright {
  font-size: 0.875rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  max-width: 600px;
  margin: 0 auto;
}

/* 子页面独立布局 (about.html, terms.html, privacy.html, sitemap.html) */
.page-header {
  padding: 60px 0 40px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 50px;
  text-align: center;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gold-light);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.back-link:hover {
  text-decoration: underline;
}

.doc-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 900px;
  margin: 0 auto 80px auto;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
}

.doc-content h2 {
  font-size: 1.6rem;
  color: #FFFFFF;
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

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

.doc-content h3 {
  font-size: 1.2rem;
  color: var(--gold-light);
  margin: 24px 0 12px 0;
}

.doc-content p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.doc-content ul {
  margin: 0 0 20px 24px;
  color: var(--text-muted);
  line-height: 1.8;
}

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

.highlight-box {
  background: rgba(212, 175, 55, 0.08);
  border-left: 4px solid var(--primary-gold);
  padding: 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: var(--gold-light);
}

/* 网站地图节点网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.sitemap-group {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(212, 175, 55, 0.12);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-group h3 {
  font-size: 1.1rem;
  color: #FFFFFF;
  margin-top: 0;
  margin-bottom: 16px;
}

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

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

.sitemap-list a {
  color: var(--gold-light);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.sitemap-list a:hover {
  text-decoration: underline;
  color: #FFFFFF;
}

/* ==========================================================================
   响应式适配 (Media Queries) - 移动端单栏自适应
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: repeat(1, 1fr);
    max-width: 500px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }

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

  .reviews-grid {
    grid-template-columns: repeat(1, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 60px 0;
  }

  .header {
    height: auto;
  }

  .navbar {
    height: 64px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 40px 0 60px 0;
  }

  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    min-height: 50px;
    font-size: 1.05rem;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-card {
    padding: 16px 12px;
  }

  .stat-value {
    font-size: 1.6rem;
  }

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

  .services-box {
    padding: 24px 16px;
  }

  .service-tags-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .service-item {
    padding: 12px;
    gap: 8px;
  }

  .service-name {
    font-size: 0.85rem;
  }

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

  .footer-nav-link {
    width: 100%;
    max-width: 280px;
  }

  .doc-content {
    padding: 24px 16px;
  }

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