/* ============================================================
   17c - www.gpahil.cn - 主样式文件
   现代极简高端风格
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --primary: #1a1a2e;
  --accent: #e94560;
  --accent-hover: #c73652;
  --bg: #f8f9fa;
  --bg-white: #ffffff;
  --text: #2d2d2d;
  --text-muted: #6c757d;
  --text-light: #adb5bd;
  --border: #e9ecef;
  --border-light: #f1f3f5;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
  --radius: 12px;
  --radius-sm: 6px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'PingFang SC','Noto Sans SC','Microsoft YaHei',sans-serif;
  --max-width: 1200px;
}

/* ---- 重置与基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }
input, textarea, select { font-family: var(--font); }

/* ---- 容器 ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 顶部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--primary);
  flex-shrink: 0;
}
.site-logo .logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: -1px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--accent);
  background: rgba(233,69,96,0.06);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-post {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-post:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(233,69,96,0.35);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---- 搜索栏 ---- */
.search-bar-wrap {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  padding: 12px 0;
}
.search-form {
  display: flex;
  align-items: center;
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-form:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233,69,96,0.10);
}
.search-input {
  flex: 1;
  padding: 10px 20px;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.9rem;
  color: var(--text);
}
.search-input::placeholder { color: var(--text-light); }
.search-btn {
  padding: 10px 20px;
  background: var(--accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0 50px 50px 0;
  transition: background var(--transition);
}
.search-btn:hover { background: var(--accent-hover); }

/* ---- 首屏Banner ---- */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.45;
  transition: transform 8s ease;
}
.hero-section:hover .hero-bg { transform: scale(1.03); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(26,26,46,0.65) 60%, rgba(233,69,96,0.18) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(233,69,96,0.18);
  border: 1px solid rgba(233,69,96,0.4);
  border-radius: 50px;
  color: #ffb3c1;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 18px;
}
.hero-title .accent { color: var(--accent); }
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(233,69,96,0.4);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(233,69,96,0.5);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border: 2px solid rgba(255,255,255,0.4);
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat { text-align: left; }
.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}
.hero-stat .num span { color: var(--accent); }
.hero-stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}

/* ---- 通用区块 ---- */
.section { padding: 80px 0; }
.section-sm { padding: 60px 0; }
.section-alt { background: var(--bg-white); }
.section-dark { background: var(--primary); color: #fff; }
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(233,69,96,0.08);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.section-dark .section-title { color: #fff; }
.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}
.section-dark .section-desc { color: rgba(255,255,255,0.65); }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1a2e;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,26,46,0.45);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: var(--accent); margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-info { padding: 16px 18px 18px; }
.video-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.video-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(233,69,96,0.08);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.video-date { font-size: 0.78rem; color: var(--text-light); }
.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-stats {
  display: flex;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-light);
}
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ---- 话题卡片 ---- */
.topic-list { display: flex; flex-direction: column; gap: 12px; }
.topic-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.topic-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.topic-rank {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text-light);
  min-width: 28px;
  text-align: center;
}
.topic-rank.top1 { color: var(--accent); }
.topic-rank.top2 { color: #ff8c42; }
.topic-rank.top3 { color: #f7c59f; }
.topic-content { flex: 1; min-width: 0; }
.topic-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topic-item:hover .topic-title { color: var(--accent); }
.topic-sub { font-size: 0.78rem; color: var(--text-light); }
.topic-views {
  font-size: 0.78rem;
  color: var(--text-light);
  white-space: nowrap;
}

/* ---- 板块分类 ---- */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.section-card {
  padding: 28px 24px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}
.section-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.section-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 14px;
}
.section-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.section-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.section-card .section-count {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ---- 数据统计 ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-item {
  padding: 40px 24px;
  background: var(--bg-white);
  text-align: center;
  transition: background var(--transition);
}
.stat-item:hover { background: var(--bg); }
.stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-num .unit { font-size: 1.2rem; color: var(--accent); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* ---- 用户评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  padding: 28px 24px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.review-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
  color: #ffc107;
  font-size: 0.9rem;
}
.review-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 18px;
  font-style: italic;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff8c42);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name { font-size: 0.875rem; font-weight: 700; color: var(--text); }
.review-role { font-size: 0.78rem; color: var(--text-light); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question.active { color: var(--accent); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1;
}
.faq-question.active .faq-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-answer.open { max-height: 300px; padding-bottom: 20px; }
.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---- 加入我们 ---- */
.join-section {
  background: linear-gradient(135deg, var(--primary) 0%, #16213e 100%);
  position: relative;
  overflow: hidden;
}
.join-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(233,69,96,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.join-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 32px auto 0;
}
.join-input {
  flex: 1;
  padding: 13px 18px;
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition);
}
.join-input::placeholder { color: rgba(255,255,255,0.45); }
.join-input:focus { border-color: var(--accent); }
.join-submit {
  padding: 13px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  transition: all var(--transition);
  white-space: nowrap;
}
.join-submit:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ---- 社交分享 ---- */
.social-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition);
}
.social-link:hover {
  background: rgba(233,69,96,0.2);
  border-color: var(--accent);
  color: #fff;
}

/* ---- 页脚 ---- */
.site-footer {
  background: #111122;
  color: rgba(255,255,255,0.6);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .site-logo { color: #fff; margin-bottom: 14px; }
.footer-desc {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.45);
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright { font-size: 0.8rem; color: rgba(255,255,255,0.35); }
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 0.82rem;
  color: var(--text-light);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text); }

/* ---- 页面头部 ---- */
.page-hero {
  background: var(--primary);
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 1rem;
  color: rgba(255,255,255,0.65);
  max-width: 480px;
  margin: 0 auto;
}

/* ---- 移动端菜单 ---- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(26,26,46,0.97);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1.3rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  padding: 12px 32px;
  border-radius: 8px;
  transition: all var(--transition);
}
.mobile-menu a:hover { color: var(--accent); background: rgba(233,69,96,0.1); }
.mobile-close {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 1.8rem;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* ---- 通知条 ---- */
.notice-bar {
  background: linear-gradient(90deg, var(--accent), #ff8c42);
  color: #fff;
  text-align: center;
  padding: 10px 24px;
  font-size: 0.82rem;
  font-weight: 500;
}
.notice-bar a { color: #fff; text-decoration: underline; }

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}
.tag-video { background: rgba(233,69,96,0.1); color: var(--accent); }
.tag-hot { background: rgba(255,140,66,0.1); color: #ff8c42; }
.tag-new { background: rgba(52,199,89,0.1); color: #34c759; }

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.page-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--bg-white);
  transition: all var(--transition);
  cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }
  .btn-post { display: none; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .sections-grid { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .join-form { flex-direction: column; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .sections-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 1.8rem; }
}