/* ============================================
   17c 影视传媒 - 原创样式表
   配色方案：活力红 + 深海蓝 + 暖橙
   ============================================ */

/* CSS Variables */
:root {
  --primary: #E63946;
  --primary-dark: #C62833;
  --secondary: #1D3557;
  --secondary-light: #264773;
  --accent: #F4A261;
  --accent-light: #F7BD8A;
  --bg-light: #F8F9FA;
  --bg-dark: #0D1117;
  --bg-card: #161B22;
  --text-dark: #2B2D42;
  --text-light: #8D99AE;
  --text-white: #EDF2F4;
  --border: #30363D;
  --shadow: rgba(0,0,0,0.15);
  --radius: 12px;
  --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--secondary); }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 70px 0; }

/* ============ HEADER / NAV ============ */
.site-header {
  background: var(--secondary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
}
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-link img { height: 42px; width: auto; }
.logo-text { color: #fff; font-size: 1.5rem; font-weight: 800; letter-spacing: 1px; }
.logo-text span { color: var(--primary); }

.main-nav { display: flex; align-items: center; gap: 0; }
.main-nav a {
  color: var(--text-white);
  padding: 22px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.main-nav a:hover::after, .main-nav a.active::after { width: 60%; }

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: #fff;
  margin: 5px 0;
  border-radius: 2px;
  transition: var(--transition);
}

/* Search Bar */
.search-bar {
  background: var(--secondary-light);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.search-bar .container { display: flex; justify-content: center; }
.search-wrap {
  display: flex;
  max-width: 600px;
  width: 100%;
  background: rgba(255,255,255,0.1);
  border-radius: 30px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.15);
}
.search-wrap input {
  flex: 1;
  padding: 10px 20px;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
}
.search-wrap input::placeholder { color: rgba(255,255,255,0.5); }
.search-wrap button {
  padding: 10px 24px;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-wrap button:hover { background: var(--primary-dark); }

/* ============ HERO BANNER ============ */
.hero-banner {
  position: relative;
  height: 520px;
  overflow: hidden;
  background: var(--bg-dark);
}
.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(29,53,87,0.85) 0%, rgba(13,17,23,0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-content {
  text-align: center;
  color: #fff;
  max-width: 750px;
  padding: 0 20px;
}
.hero-content h1 {
  font-size: 2.8rem;
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.hero-content h1 span { color: var(--primary); }
.hero-content p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 30px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230,57,70,0.4);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: #fff;
}
.btn-outline:hover {
  background: #fff;
  color: var(--secondary);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: #e8943a;
  transform: translateY(-2px);
  color: #fff;
}

/* ============ SECTION TITLES ============ */
.section-title {
  text-align: center;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: 2rem;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary);
  margin: 12px auto 0;
  border-radius: 2px;
}
.section-title p {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============ VIDEO CARDS ============ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-btn-icon {
  width: 60px;
  height: 60px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(230,57,70,0.5);
  transition: var(--transition);
}
.play-btn-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-card:hover .play-btn-icon { transform: scale(1.1); }
.video-info { padding: 16px; }
.video-info h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  gap: 16px;
  color: var(--text-light);
  font-size: 0.82rem;
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tag {
  display: inline-block;
  background: rgba(230,57,70,0.1);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  margin-top: 8px;
  font-weight: 500;
}
.duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ============ CATEGORY MODULES ============ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.category-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
}
.category-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--primary);
  box-shadow: 0 8px 28px rgba(0,0,0,0.15);
}
.category-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: #fff;
}
.category-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
.category-card p { color: var(--text-light); font-size: 0.9rem; }

/* ============ DARK SECTION ============ */
.dark-section {
  background: var(--bg-dark);
  color: var(--text-white);
}
.dark-section .section-title h2 { color: #fff; }
.dark-section .section-title p { color: var(--text-light); }
.dark-section .video-card { background: var(--bg-card); }
.dark-section .video-info h4 { color: #fff; }

/* ============ AI SECTION ============ */
.ai-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.ai-feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.ai-feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(230,57,70,0.15);
}
.ai-feature-card .icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), #ff6b7a);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}
.ai-feature-card h4 { color: #fff; font-size: 1.15rem; margin-bottom: 10px; }
.ai-feature-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.7; }

/* ============ COMMUNITY SECTION ============ */
.community-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.community-card {
  display: flex;
  gap: 20px;
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
}
.community-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.12);
}
.community-card .icon-box {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
}
.community-card h4 { font-size: 1.05rem; margin-bottom: 6px; }
.community-card p { color: var(--text-light); font-size: 0.88rem; }

/* ============ EXPERTS ============ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.expert-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}
.expert-card .info { padding: 20px 16px; }
.expert-card h4 { font-size: 1.05rem; margin-bottom: 4px; }
.expert-card .role { color: var(--primary); font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; }
.expert-card p { color: var(--text-light); font-size: 0.82rem; line-height: 1.6; }
.expert-card .expert-btns { display: flex; gap: 8px; justify-content: center; margin-top: 14px; }
.expert-card .expert-btns a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ============ PARTNERS ============ */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: #fff;
  padding: 20px 32px;
  border-radius: 10px;
  box-shadow: 0 2px 12px var(--shadow);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--secondary);
  transition: var(--transition);
  min-width: 160px;
  text-align: center;
}
.partner-item:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ============ FAQ ============ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: 0 2px 10px var(--shadow);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  font-size: 0.98rem;
}
.faq-question:hover { background: rgba(230,57,70,0.04); }
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 300;
  transition: var(--transition);
}
.faq-item.active .faq-question::after { content: '-'; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 24px 18px;
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ============ REVIEWS ============ */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); }
.review-stars { color: var(--accent); font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { color: var(--text-dark); font-size: 0.92rem; line-height: 1.8; margin-bottom: 14px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}
.review-author .name { font-weight: 600; font-size: 0.9rem; }
.review-author .date { color: var(--text-light); font-size: 0.8rem; }

/* ============ CONTACT ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.contact-item .icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
}
.contact-item h5 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-item p { color: var(--text-light); font-size: 0.88rem; }

.qrcode-wrap {
  display: flex;
  gap: 30px;
  justify-content: center;
}
.qrcode-item { text-align: center; }
.qrcode-item img { width: 150px; height: 150px; border-radius: 10px; margin-bottom: 8px; }
.qrcode-item p { font-size: 0.85rem; color: var(--text-light); font-weight: 500; }

/* ============ HOW-TO GUIDE ============ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.howto-step {
  text-align: center;
  padding: 24px 16px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 4px 16px var(--shadow);
  position: relative;
  counter-increment: step;
}
.howto-step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 auto 16px;
}
.howto-step h5 { font-size: 1rem; margin-bottom: 8px; }
.howto-step p { color: var(--text-light); font-size: 0.85rem; }

/* ============ SOCIAL SHARE ============ */
.social-share {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 500;
  color: #fff;
  transition: var(--transition);
}
.share-btn:hover { transform: translateY(-2px); color: #fff; opacity: 0.9; }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00A1D6; }

/* ============ FOOTER ============ */
.site-footer {
  background: var(--secondary);
  color: var(--text-white);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-text { font-size: 1.8rem; margin-bottom: 12px; }
.footer-brand p { color: var(--text-light); font-size: 0.88rem; line-height: 1.8; }
.footer-col h5 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}
.footer-col a {
  display: block;
  color: var(--text-light);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary); padding-left: 6px; }
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}
.footer-bottom a { color: var(--accent); }

/* ============ BREADCRUMB ============ */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--text-light);
  background: #fff;
  border-bottom: 1px solid #eee;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }

/* ============ INNER PAGE ============ */
.page-hero {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
  padding: 60px 0;
  text-align: center;
  color: #fff;
}
.page-hero h1 { color: #fff; font-size: 2.2rem; margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.8); font-size: 1.05rem; }

.content-section { padding: 50px 0; }
.content-section h2 { margin-bottom: 20px; }
.content-section h3 { margin-bottom: 14px; font-size: 1.3rem; }
.content-section p { margin-bottom: 16px; color: var(--text-dark); line-height: 1.9; }

/* Tags */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.tag {
  display: inline-block;
  background: rgba(230,57,70,0.08);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 0.82rem;
  font-weight: 500;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .ai-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--secondary);
    flex-direction: column;
    padding: 10px 0;
    box-shadow: 0 8px 20px var(--shadow);
  }
  .main-nav.active { display: flex; }
  .main-nav a { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .menu-toggle { display: block; }

  .hero-banner { height: 400px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content p { font-size: 0.95rem; }

  .ai-feature-grid { grid-template-columns: 1fr; }
  .community-features { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

@media (max-width: 480px) {
  .hero-banner { height: 320px; }
  .hero-content h1 { font-size: 1.5rem; }
  .expert-grid { grid-template-columns: 1fr; }
  .section-padding { padding: 40px 0; }
  .section-title h2 { font-size: 1.5rem; }
}

/* ============ LAZY LOAD ============ */
img[loading="lazy"] { transition: opacity 0.5s ease; }

/* ============ ANIMATIONS ============ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ LIVE BADGE ============ */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  position: absolute;
  top: 10px;
  left: 10px;
}
.live-dot {
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--text-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }