:root {
    --bg: #f6f7fb;
    --card: #ffffff;
    --ink: #101828;
    --muted: #667085;
    --line: #e5e7ef;
    --accent: #f5b14c;
    --accent-2: #2563eb;
    --green: #16846a;
    --shadow: 0 18px 42px rgba(16, 24, 40, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #fff 0%, var(--bg) 42%, #fff 100%);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.topbar, .main-nav, .search-wrap, main, .footer-grid { width: min(1180px, calc(100% - 32px)); margin-inline: auto; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 18px 0 12px; gap: 20px; }
.brand, .footer-logo { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; }
.brand img { width: 132px; height: auto; }
.brand span { letter-spacing: .02em; }
.domain-pill { font-size: 14px; color: var(--muted); background: #f2f4f7; padding: 8px 12px; border-radius: 999px; }
.main-nav { display: flex; gap: 10px; overflow-x: auto; padding: 0 0 12px; }
.main-nav a { white-space: nowrap; padding: 8px 12px; border-radius: 999px; color: #344054; font-weight: 700; }
.main-nav a:hover { background: #fff4df; color: #8a4b00; }
.search-wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; padding-bottom: 16px; }
.search-wrap input { border: 1px solid var(--line); border-radius: 14px; padding: 13px 16px; font-size: 15px; background: #fff; }
.search-wrap button, .btn, .tag { border: 0; border-radius: 14px; padding: 13px 18px; background: var(--ink); color: #fff; font-weight: 800; cursor: pointer; }
#searchHint { grid-column: 1 / -1; margin: 0; min-height: 22px; color: var(--muted); font-size: 14px; }
main { padding: 28px 0 56px; }
.hero { display: grid; grid-template-columns: 1.25fr .75fr; gap: 24px; align-items: stretch; }
.hero-card, .card, .panel, .video-card, .author-card, .comment-card, .faq-item { background: var(--card); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); }
.hero-card { padding: 30px; position: relative; overflow: hidden; }
.eyebrow { color: var(--green); font-weight: 900; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
h1 { font-size: clamp(32px, 5vw, 58px); line-height: 1.08; margin: 10px 0 16px; letter-spacing: -.04em; }
h2 { font-size: clamp(24px, 3vw, 36px); line-height: 1.2; letter-spacing: -.03em; margin: 0 0 16px; }
h3 { margin: 0 0 8px; font-size: 20px; line-height: 1.35; }
p { margin: 0 0 12px; color: #475467; }
.meta, .stats, .breadcrumb { display: flex; flex-wrap: wrap; gap: 8px 14px; color: var(--muted); font-size: 14px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.btn.secondary { background: #fff4df; color: #8a4b00; }
.hero-side { display: grid; gap: 16px; }
.panel { padding: 22px; }
.panel strong { font-size: 28px; display: block; }
.section { margin-top: 36px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.section-head p { max-width: 680px; }
.grid { display: grid; gap: 18px; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .author-card, .comment-card, .faq-item { padding: 20px; }
.video-card { overflow: hidden; position: relative; }
.video-thumb { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #e9eef5; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.play-button { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%) scale(.85); width: 68px; height: 68px; border-radius: 999px; border: 0; background: rgba(16, 24, 40, .78); color: #fff; font-size: 28px; opacity: 0; transition: .25s ease; cursor: pointer; }
.video-card:hover .play-button, .video-card:focus-within .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-body { padding: 18px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.tag { background: #eef4ff; color: #175cd3; padding: 6px 10px; border-radius: 999px; font-size: 13px; }
.article-list { display: grid; gap: 12px; }
.article-row { display: grid; grid-template-columns: 88px 1fr; gap: 14px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.article-row img { width: 88px; height: 64px; border-radius: 12px; object-fit: cover; }
.rank { font-size: 22px; font-weight: 900; color: var(--accent-2); }
.author-card { display: grid; gap: 10px; }
.author-avatar { width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center; background: #fff4df; color: #8a4b00; font-weight: 900; }
.faq-item details { cursor: pointer; }
.faq-item summary { font-weight: 900; }
.comment-card blockquote { margin: 0; color: #344054; }
.contact-box { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.notice { padding: 14px 16px; background: #ecfdf3; color: #067647; border: 1px solid #abefc6; border-radius: 16px; }
.article-main { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; }
.article-content { background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 28px; box-shadow: var(--shadow); }
.article-content figure { margin: 24px 0; }
.article-content figcaption { color: var(--muted); font-size: 14px; margin-top: 8px; }
.article-content ul { padding-left: 1.2em; }
.sidebar { position: sticky; top: 170px; display: grid; gap: 16px; }
.site-footer { background: #101828; color: #fff; padding: 42px 0; }
.site-footer p, .site-footer a { color: #d0d5dd; display: block; margin: 8px 0; }
.site-footer h2 { font-size: 18px; color: #fff; margin-bottom: 12px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 26px; }
.footer-logo img { width: 140px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 900px) {
    .hero, .grid.three, .grid.two, .contact-box, .article-main, .footer-grid { grid-template-columns: 1fr; }
    .topbar { align-items: flex-start; flex-direction: column; }
    .search-wrap { grid-template-columns: 1fr; }
    .sidebar { position: static; }
}