:root{
    --bg:#f6f4ef;
    --panel:#ffffff;
    --panel-soft:#ede9df;
    --ink:#14171f;
    --muted:#6b7280;
    --line:rgba(20,23,31,.12);
    --shadow:0 24px 80px rgba(20,23,31,.08);
    --radius:28px;
    --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
button,input{font:inherit}
.site-header{position:sticky;top:0;z-index:20;background:rgba(246,244,239,.84);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--max);margin:auto;padding:18px 22px;display:flex;align-items:center;gap:24px;justify-content:space-between}
.brand-lockup{display:inline-flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em}
.brand-mark{width:46px;height:46px;display:grid;place-items:center;border:1px solid var(--line);border-radius:16px;background:#111;color:#fff;box-shadow:var(--shadow)}
.brand-copy{white-space:nowrap}.top-nav{display:flex;gap:4px;align-items:center;justify-content:center;flex:1}.top-nav a{padding:9px 14px;border-radius:999px;color:#333}.top-nav a:hover,.top-nav a.is-active{background:#fff;box-shadow:0 8px 28px rgba(20,23,31,.06)}
.mini-cta,.primary-btn,.ghost-btn{border-radius:999px;padding:12px 18px;font-weight:700;transition:transform .25s ease,box-shadow .25s ease,background .25s ease}.mini-cta,.primary-btn{background:#111;color:#fff}.ghost-btn{background:#fff;border:1px solid var(--line)}.mini-cta:hover,.primary-btn:hover,.ghost-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.search-strip{max-width:var(--max);margin:0 auto 14px;padding:0 22px;display:flex;gap:16px;align-items:center;justify-content:space-between}.search-form{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 8px 8px 18px;min-width:min(620px,100%)}.search-form label{font-weight:700;white-space:nowrap}.search-form input{border:0;outline:0;background:transparent;width:100%;min-width:180px}.search-form button{border:0;background:#111;color:#fff;border-radius:999px;padding:9px 16px;cursor:pointer}.domain-note{font-size:14px;color:var(--muted);white-space:nowrap}
.section,.section-xl{max-width:var(--max);margin:auto;padding:92px 22px}.section-xl{padding-top:76px}.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}.eyebrow{margin:0 0 14px;color:#8b6f42;text-transform:uppercase;letter-spacing:.14em;font-size:13px;font-weight:800}.hero h1,.page-hero h1{font-size:clamp(42px,7vw,78px);line-height:1.04;letter-spacing:-.055em;margin:0 0 22px}.hero-lead,.section-heading p,.page-hero p{font-size:18px;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.trust-row{display:flex;gap:20px;margin-top:34px;flex-wrap:wrap}.trust-row span{display:flex;flex-direction:column;color:var(--muted)}.trust-row strong{font-size:26px;color:var(--ink)}
.hero-media,.page-figure{margin:0;padding:12px;background:rgba(255,255,255,.62);border:1px solid var(--line);border-radius:36px;box-shadow:var(--shadow);overflow:hidden}.hero-media img,.page-figure img{border-radius:26px}.hero-media figcaption,.page-figure figcaption,.video-card figcaption{font-size:13px;color:var(--muted);padding:10px 4px 0}.section-heading{margin-bottom:34px}.section-heading.centered{text-align:center;display:grid;place-items:center}.section-heading h2{font-size:clamp(30px,4.6vw,54px);line-height:1.1;letter-spacing:-.04em;margin:0 0 14px}.section-heading.split{display:flex;justify-content:space-between;align-items:end;gap:22px}.text-link{border-bottom:1px solid currentColor;color:#6f552d;font-weight:700}
.principle-grid,.board-grid,.stats-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.principle-grid article,.board-card,.review-card,.article-card{background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 14px 40px rgba(20,23,31,.04)}.principle-grid h3,.board-card h3,.article-card h2{font-size:22px;margin:0 0 10px}.principle-grid p,.board-card p,.review-card p,.article-card p{color:var(--muted);margin:0}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.video-card{background:#fff;border:1px solid var(--line);border-radius:30px;overflow:hidden;box-shadow:0 16px 46px rgba(20,23,31,.05);transition:transform .25s ease,box-shadow .25s ease}.video-card:hover,.video-card:focus{transform:translateY(-6px);box-shadow:var(--shadow);outline:0}.video-card figure{position:relative;margin:0;padding:10px}.video-card img{border-radius:22px;aspect-ratio:3/2;object-fit:cover}.play-btn{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.82);width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.88);opacity:0;transition:opacity .2s ease,transform .2s ease;box-shadow:0 16px 40px rgba(0,0,0,.16)}.video-card:hover .play-btn,.video-card:focus .play-btn,.video-card.is-ready .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-body{padding:8px 22px 24px}.tag{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:4px 10px;color:#7a633d;background:#faf7ef;font-size:13px;font-weight:700}.video-body h3{font-size:20px;line-height:1.35;margin:14px 0 8px}.video-body p{color:var(--muted);margin:0 0 16px}.metric-row{display:flex;gap:12px;flex-wrap:wrap;color:#606775;font-size:13px}.metric-row span{padding:5px 8px;border-radius:999px;background:#f5f5f5}.soft-panel{background:rgba(255,255,255,.44);border:1px solid var(--line);border-radius:42px}.board-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:18px;background:#111;color:#fff;font-weight:800;margin-bottom:18px}.board-card a{display:inline-block;margin-top:18px;font-weight:800;color:#6f552d}.stats-band{padding-top:74px;padding-bottom:74px}.stats-grid{grid-template-columns:repeat(4,1fr)}.stats-grid div{background:#111;color:#fff;border-radius:28px;padding:30px;text-align:center}.stats-grid strong{display:block;font-size:42px;letter-spacing:-.04em}.stats-grid span{color:rgba(255,255,255,.72)}.share-row{display:flex;gap:8px;flex-wrap:wrap}.share-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer}.review-grid{grid-template-columns:repeat(5,1fr)}.review-card{padding:24px}.review-card strong{display:block;margin-top:18px}.review-card span{color:var(--muted);font-size:14px}.faq-list{max-width:880px;margin:auto;display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 22px}.faq-list summary{cursor:pointer;font-weight:800}.faq-list p{color:var(--muted);margin:12px 0 0}.join-panel{display:grid;grid-template-columns:1fr 380px;gap:28px;align-items:center;background:#111;color:#fff;border-radius:42px;padding:46px}.join-panel p{color:rgba(255,255,255,.72)}.join-form{display:grid;gap:12px}.join-form input{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#fff;border-radius:18px;padding:14px}.join-form input::placeholder{color:rgba(255,255,255,.55)}.join-form button{border:0;border-radius:18px;padding:14px;background:#fff;color:#111;font-weight:800}.join-form small{color:rgba(255,255,255,.58)}.site-footer{border-top:1px solid var(--line);padding:54px 22px;background:#ebe7dd}.footer-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px}.site-footer h2{font-size:16px}.site-footer a{display:block;margin:8px 0;color:#353b46}.site-footer p{color:var(--muted)}.footer-brand{margin-bottom:18px}.breadcrumb{display:flex;gap:10px;margin-bottom:26px;color:var(--muted)}.breadcrumb a{color:#6f552d}.page-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}.article-grid{grid-template-columns:repeat(2,1fr)}.join-panel.compact{grid-template-columns:1fr auto}.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#111;color:#fff;border-radius:999px;padding:12px 18px;box-shadow:var(--shadow);z-index:50;font-size:14px}
@media (max-width: 920px){.header-inner{flex-wrap:wrap}.top-nav{order:3;width:100%;overflow-x:auto;justify-content:flex-start}.search-strip{display:block}.search-form{min-width:0}.domain-note{white-space:normal}.hero,.page-hero-grid,.join-panel,.join-panel.compact{grid-template-columns:1fr}.video-grid,.principle-grid,.board-grid,.review-grid,.article-grid{grid-template-columns:1fr 1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.section-heading.split{display:block}.hero h1,.page-hero h1{font-size:clamp(38px,12vw,64px)}}
@media (max-width: 620px){.section,.section-xl{padding:62px 18px}.header-inner{padding:14px 18px}.video-grid,.principle-grid,.board-grid,.review-grid,.article-grid,.stats-grid,.footer-grid{grid-template-columns:1fr}.search-form{border-radius:24px;display:grid;grid-template-columns:1fr}.search-form button{width:100%}.hero-actions{display:grid}.join-panel{padding:30px;border-radius:30px}.hero-media,.page-figure{border-radius:26px}.mini-cta{display:none}}