:root{
    --ink:#21312b;
    --deep:#163c31;
    --green:#235b49;
    --green-2:#4d7d68;
    --cream:#f7f1e3;
    --paper:#fffaf0;
    --mist:#eef3ec;
    --line:rgba(33,49,43,.13);
    --shadow:0 24px 60px rgba(22,60,49,.12);
}
*{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",Arial,sans-serif;background:var(--cream);color:var(--ink);line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px clamp(18px,4vw,56px);background:rgba(247,241,227,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;min-width:max-content}.brand-mark{width:42px;height:42px;border-radius:16px;background:var(--deep);color:var(--cream);display:grid;place-items:center;font-weight:800}.brand strong{display:block;font-size:18px;letter-spacing:.08em}.brand small{display:block;color:#66736b;font-size:12px;margin-top:-3px}.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.site-nav a{padding:9px 13px;border-radius:999px;color:#41544b;font-size:15px}.site-nav a:hover,.site-nav a.is-active{background:var(--deep);color:var(--cream)}
.nav-toggle{display:none;background:transparent;border:0;padding:8px}.nav-toggle span{display:block;width:24px;height:2px;background:var(--deep);margin:5px 0;border-radius:2px}
main{overflow:hidden}.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center;padding:clamp(48px,8vw,112px) clamp(18px,5vw,72px);min-height:680px}.hero-home{background:radial-gradient(circle at 78% 28%,rgba(77,125,104,.22),transparent 36%),linear-gradient(135deg,#fff8e8 0%,#eef3ec 58%,#e2eadc 100%)}.hero-copy{max-width:760px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:700;letter-spacing:.16em;font-size:13px;text-transform:uppercase}.eyebrow:before{content:"";width:26px;height:1px;background:var(--green-2)}h1,h2,h3{line-height:1.2;color:var(--deep);margin:0 0 16px}h1{font-size:clamp(36px,6vw,72px);letter-spacing:-.04em}h2{font-size:clamp(25px,3.2vw,42px);letter-spacing:-.025em}h3{font-size:21px}p{margin:0 0 18px;color:#52655c}.hero p{font-size:18px;max-width:680px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:999px;border:1px solid var(--deep);font-weight:700;transition:.2s ease}.btn.primary{background:var(--deep);color:var(--cream);box-shadow:0 10px 24px rgba(22,60,49,.18)}.btn.ghost{background:transparent;color:var(--deep)}.btn:hover{transform:translateY(-2px)}.hero-stats{display:flex;gap:16px;flex-wrap:wrap;margin-top:30px}.hero-stats span{padding:14px 18px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.56);color:#627369}.hero-stats strong{display:block;color:var(--deep);font-size:22px}.hero-art{position:relative}.hero-art:after{content:"";position:absolute;inset:8% 1% auto auto;width:34%;height:34%;border-radius:999px;background:rgba(77,125,104,.18);filter:blur(25px);z-index:0}.hero-art img{position:relative;z-index:1;filter:drop-shadow(0 30px 44px rgba(22,60,49,.16))}
.section{padding:clamp(48px,7vw,88px) clamp(18px,5vw,72px)}.intro-strip{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px;align-items:end;background:var(--paper)}.intro-strip p{font-size:18px}.section-head{max-width:760px;margin-bottom:34px}.section-head.center{text-align:center;margin-inline:auto}.card-grid{display:grid;gap:22px}.card-grid.three{grid-template-columns:repeat(3,1fr)}.card-grid.four{grid-template-columns:repeat(4,1fr)}.card-grid.five{grid-template-columns:repeat(5,1fr)}.topic-card,.info-card,.video-card,.learning-path article,.timeline-cards article{background:rgba(255,250,240,.84);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);overflow:hidden}.topic-card{padding:14px}.topic-card img{border-radius:22px;aspect-ratio:4/3;object-fit:cover;background:#dfe8d9}.topic-card span,.info-card span,.tag{display:inline-block;margin:18px 0 10px;color:var(--green);font-weight:800;font-size:13px;letter-spacing:.08em}.topic-card h3,.topic-card h2,.topic-card p{padding-inline:8px}.info-card{padding:28px;min-height:230px}.info-card span{margin-top:0}.split{display:grid;grid-template-columns:1fr .86fr;gap:42px;align-items:center}.split.reverse{grid-template-columns:.86fr 1fr}.split.reverse>div{order:2}.split.reverse>img{order:1}.split img{border-radius:32px;box-shadow:var(--shadow);background:var(--mist)}.feature-band{background:#eef3ec}.feature-band.pale,.pale{background:#fff8e8}.check-list{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:10px}.check-list li{position:relative;padding-left:30px;color:#41544b}.check-list li:before{content:"";position:absolute;left:0;top:.58em;width:12px;height:12px;border-radius:99px;background:var(--green)}.text-link{display:inline-flex;margin-top:14px;color:var(--deep);font-weight:800;border-bottom:1px solid var(--deep)}.timeline-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.timeline-cards article{padding:26px;position:relative}.timeline-cards b,.learning-path b{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:18px;background:var(--deep);color:var(--cream);margin-bottom:18px}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.video-card{display:flex;flex-direction:column}.video-card img{aspect-ratio:16/10;object-fit:cover;background:var(--mist)}.video-card div{padding:22px}.editor-pick,.contact-cta,.muted-panel{border:1px solid var(--line);border-radius:34px;margin-inline:clamp(18px,5vw,72px);padding:clamp(32px,5vw,58px);background:var(--deep);color:var(--cream);box-shadow:var(--shadow)}.editor-pick{display:flex;align-items:center;justify-content:space-between;gap:28px}.editor-pick h2,.editor-pick p,.contact-cta h2,.contact-cta p,.muted-panel h2,.muted-panel p{color:var(--cream)}.editor-pick .eyebrow,.contact-cta .eyebrow{color:#c8d9c7}.editor-pick .eyebrow:before,.contact-cta .eyebrow:before{background:#c8d9c7}.muted-panel{background:#fffaf0;color:var(--ink)}.muted-panel h2{color:var(--deep)}.muted-panel p{color:#52655c}.faq-list{display:grid;gap:14px}.faq-list details{border:1px solid var(--line);border-radius:22px;background:#fffaf0;padding:18px 22px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--deep)}.faq-list p{padding-top:12px}.contact-cta{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,#163c31,#235b49)}
.page-hero{padding:clamp(52px,8vw,104px) clamp(18px,5vw,72px);background:linear-gradient(135deg,#fffaf0,#eef3ec);border-bottom:1px solid var(--line)}.page-hero h1{max-width:980px}.page-hero p{max-width:790px;font-size:18px}.filter-panel{display:flex;gap:12px;flex-wrap:wrap;padding-bottom:10px}.filter-btn{border:1px solid var(--line);background:#fffaf0;border-radius:999px;padding:12px 20px;color:var(--deep);cursor:pointer;font-weight:800}.filter-btn.is-active,.filter-btn:hover{background:var(--deep);color:var(--cream)}.documentary-grid .video-card[data-hidden="true"]{display:none}.topic-map{display:grid;grid-template-columns:.95fr 1.05fr;gap:38px;align-items:center}.topic-map img{border-radius:34px;background:#eef3ec;box-shadow:var(--shadow)}.map-copy{max-width:680px}.learning-path{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.learning-path article{padding:28px}.contact-box{margin-top:26px;padding:22px;border-radius:24px;background:rgba(35,91,73,.08);border:1px solid var(--line)}.contact-box span{font-weight:800;color:var(--green)}.form-section{max-width:880px;margin:0 auto}.contact-form{display:grid;gap:16px;background:#fffaf0;border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow)}.contact-form label{display:grid;gap:8px;color:var(--deep);font-weight:800}.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid var(--line);border-radius:16px;padding:13px 14px;background:#fff;color:var(--ink);font:inherit}.form-note{font-size:14px;color:#718077}.site-footer{padding:48px clamp(18px,5vw,72px) 24px;background:#112b24;color:#e9efdf}.site-footer p,.site-footer a,.site-footer span{color:#cdd8cd}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:28px}.footer-grid a{display:block;margin-top:8px}.footer-grid strong{display:block;color:#fff;margin-bottom:12px}.domain-line{font-weight:800}.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:34px}.muted{font-size:14px;opacity:.78}
@media (max-width:1100px){.card-grid.four,.card-grid.five,.timeline-cards,.learning-path{grid-template-columns:repeat(2,1fr)}.video-grid,.card-grid.three{grid-template-columns:repeat(2,1fr)}.hero,.intro-strip,.split,.split.reverse,.topic-map{grid-template-columns:1fr}.split.reverse>div,.split.reverse>img{order:initial}.hero{min-height:auto}.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:760px){.site-header{align-items:flex-start}.nav-toggle{display:block;margin-left:auto}.site-nav{display:none;position:absolute;left:18px;right:18px;top:74px;padding:14px;background:#fffaf0;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.site-nav.is-open{display:grid}.site-nav a{padding:12px 14px}.hero,.section,.page-hero{padding-left:18px;padding-right:18px}.hero-actions,.editor-pick,.contact-cta{align-items:stretch;flex-direction:column}.card-grid.four,.card-grid.five,.card-grid.three,.timeline-cards,.learning-path,.video-grid{grid-template-columns:1fr}.editor-pick,.contact-cta,.muted-panel{margin-inline:18px}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:grid}.hero-stats{display:grid;grid-template-columns:1fr}.brand small{display:none}}