:root {
    --bg: #f7f3ec;
    --panel: #fffaf2;
    --ink: #15130f;
    --muted: #6f675d;
    --line: rgba(21, 19, 15, .12);
    --gold: #c19a5b;
    --deep: #11110f;
    --soft: rgba(255, 255, 255, .72);
    --radius: 28px;
    --shadow: 0 24px 70px rgba(21, 19, 15, .09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 8%, rgba(193, 154, 91, .16), transparent 26rem),
        radial-gradient(circle at 90% 16%, rgba(196, 210, 203, .36), transparent 28rem),
        var(--bg);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; height: auto; }
button, input, textarea { font: inherit; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(247, 243, 236, .84);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 18px 24px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}
.brand img, .footer-logo img { width: 180px; height: auto; }
.main-nav { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; font-size: 14px; color: var(--muted); }
.main-nav a { position: relative; padding: 8px 0; }
.main-nav a::after { content: ""; position: absolute; left: 0; bottom: 2px; width: 0; height: 1px; background: var(--ink); transition: width .25s ease; }
.main-nav a:hover::after { width: 100%; }
.search-band {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px 16px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: center;
}
.search-form {
    display: flex;
    border: 1px solid var(--line);
    background: rgba(255, 250, 242, .78);
    border-radius: 999px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(21, 19, 15, .04);
}
.search-form input { flex: 1; border: 0; outline: 0; padding: 13px 20px; background: transparent; min-width: 0; }
.search-form button { border: 0; padding: 13px 22px; background: var(--deep); color: #fffaf2; cursor: pointer; }
.search-note { margin: 0; color: var(--muted); font-size: 13px; }
.section-pad { max-width: 1240px; margin: 0 auto; padding: 88px 24px; }
.hero, .sub-hero { min-height: calc(100vh - 120px); display: grid; grid-template-columns: minmax(0, .92fr) minmax(320px, 1fr); align-items: center; gap: 64px; }
.eyebrow { margin: 0 0 14px; color: var(--gold); letter-spacing: .14em; text-transform: uppercase; font-size: 13px; font-weight: 700; }
h1, h2, h3 { line-height: 1.16; letter-spacing: -.03em; margin: 0; }
h1 { font-size: clamp(42px, 7vw, 86px); }
h2 { font-size: clamp(30px, 4.2vw, 54px); }
h3 { font-size: 22px; }
p { color: var(--muted); }
.hero-text, .sub-copy p { font-size: 18px; max-width: 680px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 34px 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; padding: 14px 24px; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease, background .25s ease; cursor: pointer; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(21, 19, 15, .12); }
.btn.primary { background: var(--deep); color: #fffaf2; }
.btn.ghost { background: rgba(255, 250, 242, .65); }
.hero-media, .sub-media { margin: 0; position: relative; }
.hero-media img, .sub-media img { border-radius: 42px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.7); }
figcaption { margin-top: 12px; color: var(--muted); font-size: 13px; }
.mini-stats, .video-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0; }
.mini-stats div, .video-stats div { border-top: 1px solid var(--line); padding-top: 14px; }
dt { color: var(--muted); font-size: 13px; }
dd { margin: 0; font-weight: 800; font-size: 22px; }
.section-head { display: grid; grid-template-columns: .8fr 1fr; gap: 40px; align-items: end; margin-bottom: 38px; }
.section-head.narrow { display: block; max-width: 820px; margin-left: auto; margin-right: auto; text-align: center; }
.intro-grid, .service-grid, .review-grid, .inner-grid, .strength-grid, .article-grid { display: grid; gap: 18px; }
.intro-grid { grid-template-columns: repeat(4, 1fr); }
.service-grid { grid-template-columns: repeat(3, 1fr); }
.review-grid { grid-template-columns: repeat(3, 1fr); }
.inner-grid { grid-template-columns: repeat(5, 1fr); }
.strength-grid { grid-template-columns: repeat(4, 1fr); }
.article-grid { grid-template-columns: repeat(3, 1fr); }
.soft-card, .service-card, .review-card, .inner-card, .metric, .article-card, .faq-item {
    background: rgba(255, 250, 242, .72);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
    box-shadow: 0 12px 44px rgba(21, 19, 15, .04);
}
.soft-card span, .card-num { color: var(--gold); font-weight: 800; letter-spacing: .12em; }
.service-card { min-height: 248px; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.small-grid { grid-template-columns: repeat(3, 1fr); }
.video-card {
    background: rgba(255, 250, 242, .78);
    border: 1px solid var(--line);
    border-radius: 32px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform .25s ease, border-color .25s ease;
}
.video-card:hover, .video-card:focus { transform: translateY(-6px); border-color: rgba(193,154,91,.45); outline: 0; }
.video-card figure { margin: 0; position: relative; }
.video-card figure img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.video-card figcaption { padding: 0 22px; }
.play-badge {
    position: absolute;
    left: 50%; top: 50%; transform: translate(-50%, -50%) scale(.88);
    width: 74px; height: 74px; border-radius: 50%;
    display: grid; place-items: center;
    background: rgba(17, 17, 15, .82); color: #fffaf2; font-size: 14px;
    opacity: 0; transition: opacity .25s ease, transform .25s ease;
}
.video-card:hover .play-badge, .video-card:focus .play-badge, .video-card.is-active .play-badge { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-body { padding: 22px; }
.tags { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.tags span { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; background: rgba(255,255,255,.48); }
.video-stats dd { font-size: 17px; }
.metric strong { display: block; font-size: 44px; line-height: 1; }
.metric span { display: block; margin-top: 10px; font-weight: 800; }
.review-card p { font-size: 17px; color: var(--ink); }
.review-card span { color: var(--muted); font-size: 13px; }
.faq-list { display: grid; gap: 12px; max-width: 900px; margin: 0 auto; }
.faq-item { padding: 0; overflow: hidden; }
.faq-item summary { cursor: pointer; list-style: none; padding: 24px 28px; font-weight: 800; display: flex; justify-content: space-between; gap: 24px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--gold); font-size: 24px; line-height: 1; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { padding: 0 28px 26px; margin: 0; }
.contact-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; background: var(--deep); color: #fffaf2; border-radius: 42px; padding: clamp(28px, 5vw, 58px); box-shadow: var(--shadow); }
.contact-panel p, .contact-panel li { color: rgba(255,250,242,.72); }
.contact-list { padding-left: 18px; }
.contact-form { display: grid; gap: 14px; }
.contact-form label { display: grid; gap: 8px; color: rgba(255,250,242,.86); }
.contact-form input, .contact-form textarea { border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.06); color: #fffaf2; border-radius: 18px; padding: 13px 16px; outline: 0; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(255,250,242,.42); }
.contact-form .btn.primary { background: #fffaf2; color: var(--deep); }
.sub-hero { min-height: 560px; }
.breadcrumb { display: flex; gap: 10px; flex-wrap: wrap; color: var(--muted); margin-top: 26px; font-size: 14px; }
.site-footer { border-top: 1px solid var(--line); padding: 56px 24px; background: rgba(255, 250, 242, .5); }
.footer-grid { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px; }
.footer-grid h2 { font-size: 17px; margin-bottom: 14px; }
.footer-grid a { display: block; color: var(--muted); margin: 8px 0; }
.domain-line { font-size: 13px; }
.back-top { position: fixed; right: 18px; bottom: 18px; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow); cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .25s ease; }
.back-top.show { opacity: 1; pointer-events: auto; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.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: 1040px) {
    .hero, .sub-hero, .contact-panel { grid-template-columns: 1fr; }
    .intro-grid, .service-grid, .review-grid, .video-grid, .strength-grid, .article-grid { grid-template-columns: repeat(2, 1fr); }
    .inner-grid { grid-template-columns: repeat(3, 1fr); }
    .section-head { grid-template-columns: 1fr; gap: 12px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
    .header-inner { align-items: flex-start; }
    .main-nav { gap: 12px; }
    .search-band { grid-template-columns: 1fr; }
    .section-pad { padding: 64px 18px; }
    .hero, .sub-hero { min-height: auto; gap: 34px; }
    .intro-grid, .service-grid, .review-grid, .video-grid, .strength-grid, .article-grid, .inner-grid, .small-grid { grid-template-columns: 1fr; }
    .mini-stats { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .search-form { border-radius: 24px; display: grid; }
    .search-form button { border-radius: 0; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
    .reveal { opacity: 1; transform: none; }
}