:root {
    --bg: #f7f7f2;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --line: #e2e8f0;
    --brand: #f97316;
    --deep: #0f172a;
    --soft: #fff7ed;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
img { max-width: 100%; display: block; }
.site-header {
    background: linear-gradient(135deg, #fff7ed 0%, #ffffff 56%, #eef6ff 100%);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 22px 20px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
}
.brand-logo, .footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 900;
    letter-spacing: .04em;
    color: var(--deep);
}
.brand-logo span { font-size: 30px; }
.brand-logo img, .footer-logo img { border-radius: 20px; box-shadow: 0 10px 30px rgba(15, 23, 42, .12); }
.header-slogan { margin: 0; color: var(--muted); font-weight: 700; }
.site-nav {
    max-width: 1180px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,.76);
    border: 1px solid var(--line);
    font-weight: 700;
}
.search-panel {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px 22px;
}
.search-panel label { display: block; font-weight: 800; margin-bottom: 8px; }
.search-row { display: flex; gap: 10px; }
.search-row input {
    flex: 1;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 13px 14px;
    font-size: 16px;
    background: #fff;
}
.search-row button, .btn {
    border: 0;
    background: var(--deep);
    color: #fff;
    border-radius: 14px;
    padding: 12px 18px;
    font-weight: 800;
    cursor: pointer;
}
.search-message { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
main { max-width: 1180px; margin: 0 auto; padding: 26px 20px 42px; }
.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr);
    gap: 22px;
    align-items: stretch;
}
.panel, .video-card, .author-card, .comment-card, .faq-item, .article-page, .topic-card, .contact-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, .06);
}
.panel { padding: 24px; }
.kicker, .eyebrow {
    display: inline-flex;
    color: var(--brand);
    background: var(--soft);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 13px;
    font-weight: 900;
    margin: 0 0 10px;
}
h1, h2, h3 { line-height: 1.25; color: var(--deep); }
h1 { font-size: clamp(30px, 4vw, 54px); margin: 0 0 16px; }
h2 { font-size: clamp(22px, 2.4vw, 32px); margin: 0 0 18px; }
h3 { font-size: 20px; margin: 0 0 10px; }
.lead { font-size: 18px; color: #475569; }
.section { margin-top: 34px; }
.section-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: end;
    margin-bottom: 16px;
}
.section-head p { margin: 0; color: var(--muted); }
.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.video-card { overflow: hidden; }
.video-card.featured { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .9fr); }
.video-cover {
    position: relative;
    min-height: 260px;
    background: #111827;
    overflow: hidden;
}
.video-cover img { width: 100%; height: 100%; object-fit: cover; min-height: 260px; transition: transform .35s ease; }
.play-overlay {
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%) scale(.86);
    opacity: 0;
    transition: .25s ease;
    width: 76px; height: 76px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(15, 23, 42, .86);
    color: #fff;
    font-weight: 900;
    box-shadow: 0 10px 35px rgba(0,0,0,.28);
}
.video-card:hover .play-overlay, .video-card:focus-within .play-overlay { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-card:hover .video-cover img { transform: scale(1.04); }
.video-body { padding: 18px; }
.video-body p { margin: 8px 0; }
.stats { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.stats span {
    background: #f1f5f9;
    border-radius: 999px;
    padding: 6px 10px;
    font-weight: 800;
    color: #334155;
    font-size: 13px;
}
.meta { color: var(--muted); font-size: 13px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud span {
    display: inline-flex;
    padding: 5px 9px;
    background: #eff6ff;
    border-radius: 999px;
    color: #1d4ed8;
    font-size: 13px;
    font-weight: 700;
}
.news-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.news-list li { padding-bottom: 12px; border-bottom: 1px dashed var(--line); }
.news-list a { font-weight: 800; color: var(--deep); }
.author-card, .comment-card, .faq-item, .topic-card, .contact-card { padding: 18px; }
.author-card p, .comment-card p, .faq-item p, .topic-card p { margin: 6px 0 0; color: #475569; }
.comment-card strong { display: block; margin-bottom: 8px; color: var(--deep); }
.breadcrumb { display: flex; gap: 9px; flex-wrap: wrap; color: var(--muted); margin-bottom: 18px; font-size: 14px; }
.breadcrumb strong { color: var(--deep); }
.article-page { padding: clamp(18px, 4vw, 42px); }
.article-hero img { width: 100%; border-radius: 24px; margin: 18px 0; }
.article-content h2 { margin-top: 30px; }
.article-content p { font-size: 17px; }
.article-note {
    padding: 16px;
    border-left: 5px solid var(--brand);
    background: var(--soft);
    border-radius: 16px;
}
.site-footer {
    background: #0f172a;
    color: #e2e8f0;
    padding: 36px 20px;
}
.footer-grid {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr .8fr 1fr;
    gap: 24px;
}
.footer-logo { color: #fff; }
.site-footer a { color: #fff; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer p { color: #cbd5e1; }
@media (max-width: 860px) {
    .hero, .video-card.featured, .footer-grid { grid-template-columns: 1fr; }
    .grid.two, .grid.three { grid-template-columns: 1fr; }
    .header-inner { align-items: flex-start; flex-direction: column; }
    .search-row { flex-direction: column; }
    .section-head { align-items: flex-start; flex-direction: column; }
}