/* =============================================
   国产 修车改装视频社区 - 主样式表
   品牌色：深夜钢铁蓝 #0d1b2a + 橙焰 #f4600c + 铬银 #c8cdd2
   字体：系统中文优先
   ============================================= */

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  background: #0a1520;
  color: #d4dae0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: #f4600c; text-decoration: none; transition: color .2s; }
a:hover { color: #ff8c42; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ---- CSS Variables ---- */
:root {
  --brand:       #f4600c;
  --brand-dark:  #c44a00;
  --brand-light: #ff8c42;
  --navy:        #0d1b2a;
  --navy-mid:    #132233;
  --navy-light:  #1c3048;
  --chrome:      #c8cdd2;
  --chrome-dark: #8a9099;
  --text-main:   #d4dae0;
  --text-muted:  #7a8899;
  --text-white:  #f0f4f8;
  --border:      rgba(244,96,12,.18);
  --card-bg:     #111f2e;
  --card-hover:  #162840;
  --shadow:      0 4px 24px rgba(0,0,0,.45);
  --radius:      10px;
  --radius-lg:   18px;
  --transition:  .25s ease;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy); }
::-webkit-scrollbar-thumb { background: var(--brand); border-radius: 3px; }

/* ---- Utility ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-alt { background: var(--navy-mid); }
.text-center { text-align: center; }
.text-brand { color: var(--brand); }
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
}
.badge-brand { background: var(--brand); color: #fff; }
.badge-new { background: #22c55e; color: #fff; }
.badge-hot { background: #ef4444; color: #fff; }
.badge-live { background: #8b5cf6; color: #fff; animation: pulse-badge 1.5s infinite; }
@keyframes pulse-badge { 0%,100%{opacity:1} 50%{opacity:.6} }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius); font-size: .95rem;
  font-weight: 700; cursor: pointer; border: none; transition: var(--transition);
  letter-spacing: .03em;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(244,96,12,.4); }
.btn-outline { background: transparent; color: var(--brand); border: 2px solid var(--brand); }
.btn-outline:hover { background: var(--brand); color: #fff; }
.btn-ghost { background: rgba(255,255,255,.07); color: var(--text-white); border: 1px solid rgba(255,255,255,.12); }
.btn-ghost:hover { background: rgba(255,255,255,.14); color: #fff; }
.section-header { margin-bottom: 44px; }
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800;
  color: var(--text-white); line-height: 1.25;
}
.section-header h2 span { color: var(--brand); }
.section-header p { color: var(--text-muted); margin-top: 10px; font-size: .97rem; }
.divider {
  width: 52px; height: 4px; background: var(--brand);
  border-radius: 2px; margin: 14px 0 0;
}
.divider-center { margin: 14px auto 0; }

/* ---- Topbar ---- */
#topbar {
  background: var(--brand);
  padding: 7px 0;
  font-size: .82rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
}
#topbar .container { display: flex; justify-content: space-between; align-items: center; }
#topbar a { color: #fff; }
#topbar a:hover { text-decoration: underline; }
.topbar-ticker { display: flex; gap: 24px; }

/* ---- Header ---- */
#siteHeader {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(13,27,42,.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 24px;
}
.site-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.site-logo img.logo-img { height: 44px; width: auto; }
.site-logo img.favicon-img { height: 32px; width: 32px; border-radius: 6px; }
.site-logo .logo-text { font-size: 1.5rem; font-weight: 900; color: var(--brand); letter-spacing: -.02em; }

/* ---- Nav ---- */
#mainNav { display: flex; align-items: center; gap: 4px; }
#mainNav a {
  padding: 8px 14px; border-radius: var(--radius); font-size: .9rem;
  font-weight: 600; color: var(--text-main); transition: var(--transition);
  white-space: nowrap;
}
#mainNav a:hover, #mainNav a.active { color: var(--brand); background: rgba(244,96,12,.1); }

/* ---- Search Bar ---- */
#headerSearchWrap {
  flex: 1; max-width: 340px;
  display: flex; align-items: center;
  background: var(--navy-light); border: 1px solid var(--border);
  border-radius: 24px; padding: 0 16px; gap: 8px;
  transition: var(--transition);
}
#headerSearchWrap:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(244,96,12,.15); }
#headerSearchInput {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text-main); font-size: .88rem; padding: 9px 0;
}
#headerSearchInput::placeholder { color: var(--text-muted); }
#headerSearchBtn {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 1rem; padding: 0;
  transition: color .2s;
}
#headerSearchBtn:hover { color: var(--brand); }
#searchDropdown {
  display: none; position: absolute; top: 100%; left: 0; right: 0;
  background: var(--navy-mid); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; margin-top: 6px;
  box-shadow: var(--shadow); z-index: 200;
}
#searchDropdown.show { display: block; }
.search-hot-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.search-hot-tags a {
  padding: 4px 12px; background: var(--navy-light); border-radius: 20px;
  font-size: .8rem; color: var(--text-muted); border: 1px solid var(--border);
}
.search-hot-tags a:hover { border-color: var(--brand); color: var(--brand); background: rgba(244,96,12,.08); }

/* ---- Header Actions ---- */
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-actions .btn { padding: 8px 18px; font-size: .85rem; }

/* ---- Mobile Nav Toggle ---- */
#mobileNavToggle {
  display: none; background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px; padding: 4px;
}
#mobileNavToggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-main); border-radius: 2px; transition: var(--transition);
}
#mobileNav {
  display: none; position: fixed; top: 0; right: 0; bottom: 0;
  width: 280px; background: var(--navy-mid); z-index: 2000;
  padding: 24px; overflow-y: auto;
  box-shadow: -8px 0 40px rgba(0,0,0,.5);
  transform: translateX(100%); transition: transform .3s ease;
}
#mobileNav.open { transform: translateX(0); }
#mobileNav .close-btn {
  background: none; border: none; color: var(--text-muted);
  font-size: 1.4rem; cursor: pointer; float: right; margin-bottom: 24px;
}
#mobileNav a {
  display: block; padding: 12px 0; border-bottom: 1px solid var(--border);
  color: var(--text-main); font-weight: 600;
}
#mobileNav a:hover { color: var(--brand); }
.nav-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.6); z-index: 1999;
}
.nav-overlay.show { display: block; }

/* ---- Hero Banner ---- */
#heroBanner {
  position: relative; min-height: 580px;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('/assets/images/hero_banner.jpg');
  background-size: cover; background-position: center;
  filter: brightness(.45);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(13,27,42,.85) 0%, rgba(244,96,12,.12) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 680px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(244,96,12,.15); border: 1px solid rgba(244,96,12,.3);
  border-radius: 20px; padding: 5px 14px; margin-bottom: 20px;
  font-size: .82rem; font-weight: 700; color: var(--brand-light); letter-spacing: .06em;
}
.hero-eyebrow .dot { width: 7px; height: 7px; background: var(--brand); border-radius: 50%; animation: pulse-badge 1.5s infinite; }
#heroBanner h1 {
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 900;
  color: #fff; line-height: 1.15; margin-bottom: 18px;
}
#heroBanner h1 em { color: var(--brand); font-style: normal; }
.hero-desc {
  font-size: 1.05rem; color: rgba(255,255,255,.75);
  margin-bottom: 32px; line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 1.8rem; font-weight: 900; color: var(--brand); line-height: 1; }
.hero-stat-label { font-size: .78rem; color: var(--text-muted); margin-top: 4px; }

/* ---- Video Cards ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  overflow: hidden; transition: var(--transition);
  border: 1px solid rgba(255,255,255,.05);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-5px); box-shadow: 0 12px 36px rgba(0,0,0,.5); border-color: var(--border); background: var(--card-hover); }
.video-thumb {
  position: relative; aspect-ratio: 16/9; overflow: hidden;
  background: var(--navy-light);
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.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(0,0,0,.3); opacity: 0; transition: opacity .25s;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 54px; height: 54px; background: var(--brand);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(244,96,12,.6);
  transform: scale(.85); transition: transform .25s;
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: ''; border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,.75); color: #fff;
  font-size: .75rem; font-weight: 700; padding: 2px 7px; border-radius: 4px;
}
.video-tag {
  position: absolute; top: 8px; left: 8px;
}
.video-meta { padding: 14px 16px; }
.video-meta h3 {
  font-size: .92rem; font-weight: 700; color: var(--text-white);
  line-height: 1.4; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-author { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.author-avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--brand); display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 800; color: #fff; flex-shrink: 0;
}
.author-name { font-size: .8rem; color: var(--text-muted); }
.video-stats { display: flex; gap: 12px; font-size: .78rem; color: var(--text-muted); }
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ---- Featured Video (Big Card) ---- */
.featured-video-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  overflow: hidden; display: grid; grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border); transition: var(--transition);
}
.featured-video-card:hover { box-shadow: var(--shadow); }
.featured-video-card .video-thumb { aspect-ratio: auto; height: 100%; min-height: 240px; }
.featured-video-card .video-info { padding: 28px; display: flex; flex-direction: column; justify-content: center; }
.featured-video-card h2 { font-size: 1.3rem; font-weight: 800; color: var(--text-white); margin: 12px 0 10px; }
.featured-video-card p { font-size: .9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }

/* ---- Category Tabs ---- */
.cat-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.cat-tab {
  padding: 7px 18px; border-radius: 20px; font-size: .85rem; font-weight: 700;
  cursor: pointer; border: 1.5px solid var(--border); background: transparent;
  color: var(--text-muted); transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--brand); border-color: var(--brand); color: #fff;
}

/* ---- Expert Cards ---- */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.expert-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 28px 22px; text-align: center;
  border: 1px solid rgba(255,255,255,.05); transition: var(--transition);
}
.expert-card:hover { border-color: var(--border); transform: translateY(-4px); box-shadow: var(--shadow); }
.expert-avatar {
  width: 80px; height: 80px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  margin: 0 auto 16px; display: flex; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 900; color: #fff;
  border: 3px solid var(--brand);
}
.expert-card h3 { font-size: 1.05rem; font-weight: 800; color: var(--text-white); margin-bottom: 4px; }
.expert-role { font-size: .82rem; color: var(--brand); font-weight: 700; margin-bottom: 10px; }
.expert-bio { font-size: .83rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.expert-tag { padding: 3px 10px; background: var(--navy-light); border-radius: 12px; font-size: .75rem; color: var(--chrome-dark); }
.expert-award { font-size: .8rem; color: #f59e0b; font-weight: 700; margin-bottom: 16px; }
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.expert-actions .btn { padding: 7px 14px; font-size: .8rem; }

/* ---- AI Section ---- */
.ai-features { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.ai-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 28px 22px; border: 1px solid rgba(255,255,255,.05);
  transition: var(--transition); position: relative; overflow: hidden;
}
.ai-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand), #8b5cf6);
}
.ai-card:hover { border-color: var(--border); transform: translateY(-4px); }
.ai-icon { font-size: 2.2rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1rem; font-weight: 800; color: var(--text-white); margin-bottom: 8px; }
.ai-card p { font-size: .85rem; color: var(--text-muted); line-height: 1.65; }

/* ---- Partners ---- */
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; }
.partner-item {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 18px; text-align: center; border: 1px solid rgba(255,255,255,.05);
  font-weight: 700; font-size: .88rem; color: var(--text-muted);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--border); color: var(--brand); background: var(--card-hover); }

/* ---- How To Steps ---- */
.steps-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.step-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 28px 22px; border: 1px solid rgba(255,255,255,.05);
  position: relative;
}
.step-num {
  width: 44px; height: 44px; background: var(--brand); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 900; color: #fff; margin-bottom: 16px;
}
.step-card h3 { font-size: 1rem; font-weight: 800; color: var(--text-white); margin-bottom: 8px; }
.step-card p { font-size: .85rem; color: var(--text-muted); line-height: 1.65; }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg); border-radius: var(--radius);
  margin-bottom: 10px; border: 1px solid rgba(255,255,255,.05);
  overflow: hidden;
}
.faq-question {
  width: 100%; background: none; border: none; cursor: pointer;
  padding: 18px 22px; display: flex; justify-content: space-between; align-items: center;
  color: var(--text-white); font-size: .95rem; font-weight: 700; text-align: left;
  transition: color .2s;
}
.faq-question:hover { color: var(--brand); }
.faq-icon { font-size: 1.2rem; color: var(--brand); transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
  padding: 0 22px;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }
.faq-answer p { font-size: .9rem; color: var(--text-muted); line-height: 1.75; }

/* ---- Reviews ---- */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.review-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 24px; border: 1px solid rgba(255,255,255,.05); transition: var(--transition);
}
.review-card:hover { border-color: var(--border); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.reviewer-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), #8b5cf6);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1rem; color: #fff; flex-shrink: 0;
}
.reviewer-info h4 { font-size: .9rem; font-weight: 700; color: var(--text-white); }
.reviewer-info span { font-size: .78rem; color: var(--text-muted); }
.review-stars { color: #f59e0b; font-size: .95rem; margin-bottom: 10px; }
.review-text { font-size: .87rem; color: var(--text-muted); line-height: 1.7; }

/* ---- Contact Section ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info h3 { font-size: 1.2rem; font-weight: 800; color: var(--text-white); margin-bottom: 20px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 18px; }
.contact-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.contact-item h4 { font-size: .88rem; font-weight: 700; color: var(--text-white); margin-bottom: 3px; }
.contact-item p, .contact-item a { font-size: .85rem; color: var(--text-muted); }
.qr-row { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 24px; }
.qr-box { text-align: center; }
.qr-box img { width: 100px; height: 100px; border-radius: var(--radius); background: #fff; padding: 6px; }
.qr-box p { font-size: .78rem; color: var(--text-muted); margin-top: 6px; }
.social-share { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.share-btn {
  padding: 8px 16px; border-radius: var(--radius); font-size: .82rem; font-weight: 700;
  cursor: pointer; border: none; transition: var(--transition);
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #010101; color: #fff; border: 1px solid #333; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: .85; transform: translateY(-2px); }

/* ---- Footer ---- */
#siteFooter {
  background: var(--navy); border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .logo-wrap img { height: 38px; }
.footer-brand .logo-wrap .logo-text { font-size: 1.3rem; font-weight: 900; color: var(--brand); }
.footer-brand p { font-size: .87rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 18px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--navy-light); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: var(--text-muted); transition: var(--transition);
}
.footer-social a:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
.footer-col h4 { font-size: .92rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: .85rem; color: var(--text-muted); transition: color .2s; }
.footer-col ul li a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
}
.footer-bottom p { font-size: .82rem; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--brand); }
.footer-links { display: flex; gap: 18px; }

/* ---- Breadcrumb ---- */
.breadcrumb {
  padding: 14px 0; font-size: .83rem; color: var(--text-muted);
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--brand); }

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-light) 100%);
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 900; color: var(--text-white); margin-bottom: 10px; }
.page-hero h1 span { color: var(--brand); }
.page-hero p { font-size: 1rem; color: var(--text-muted); max-width: 600px; }

/* ---- Stats Bar ---- */
.stats-bar {
  background: var(--navy-mid); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.stats-bar-inner { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 20px; }
.stat-item { text-align: center; }
.stat-item .num { font-size: 2rem; font-weight: 900; color: var(--brand); line-height: 1; }
.stat-item .label { font-size: .8rem; color: var(--text-muted); margin-top: 4px; }

/* ---- Live Section ---- */
.live-section-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.live-thumb {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 16/9;
}
.live-thumb img { width: 100%; height: 100%; object-fit: cover; }
.live-badge {
  position: absolute; top: 14px; left: 14px;
  background: #ef4444; color: #fff; font-size: .78rem; font-weight: 800;
  padding: 4px 12px; border-radius: 20px; letter-spacing: .08em;
  display: flex; align-items: center; gap: 6px;
}
.live-dot { width: 7px; height: 7px; background: #fff; border-radius: 50%; animation: pulse-badge 1s infinite; }
.live-info h2 { font-size: 1.5rem; font-weight: 900; color: var(--text-white); margin-bottom: 12px; }
.live-info p { font-size: .93rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 20px; }
.live-stats { display: flex; gap: 20px; margin-bottom: 24px; flex-wrap: wrap; }
.live-stat { font-size: .85rem; color: var(--text-muted); }
.live-stat strong { color: var(--brand); }

/* ---- Lazy Load ---- */
img[data-src] { opacity: 0; transition: opacity .4s; }
img.loaded { opacity: 1; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .featured-video-card { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .live-section-inner { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  #mainNav, #headerSearchWrap, .header-actions .btn:not(.btn-primary) { display: none; }
  #mobileNavToggle { display: flex; }
  .hero-stats { gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 48px 0; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .expert-grid, .ai-features, .steps-grid { grid-template-columns: 1fr; }
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp .6s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }
.delay-4 { animation-delay: .4s; }

/* ---- Highlight strip ---- */
.highlight-strip {
  background: linear-gradient(90deg, var(--brand) 0%, #ff6b35 50%, var(--brand-dark) 100%);
  padding: 18px 0; text-align: center;
  font-size: .92rem; font-weight: 700; color: #fff; letter-spacing: .03em;
}
.highlight-strip a { color: #fff; text-decoration: underline; }