:root{
    --ink:#1e2722;
    --soft-ink:#556259;
    --green:#264b3a;
    --green-2:#3f6b55;
    --sage:#d9e3d3;
    --sand:#f4efe4;
    --paper:#fffaf0;
    --stone:#e8e0d2;
    --line:rgba(38,75,58,.18);
    --shadow:0 24px 70px rgba(30,39,34,.12);
    --radius:24px;
}
*{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;color:var(--ink);background:var(--paper);line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1160px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,250,240,.86);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;min-width:max-content}.brand-mark{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:var(--paper);font-weight:800}.brand-copy{display:flex;flex-direction:column;line-height:1.2}.brand-copy strong{font-size:20px}.brand-copy em{font-style:normal;color:var(--soft-ink);font-size:12px;letter-spacing:.18em}
.site-nav{display:flex;align-items:center;gap:4px}.nav-link{padding:10px 14px;border-radius:999px;color:var(--soft-ink);font-size:15px}.nav-link:hover,.nav-link.is-active{background:var(--green);color:var(--paper)}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--paper);color:var(--green);border-radius:999px;padding:8px 14px;font-weight:700}
.hero{padding:86px 0 70px;background:radial-gradient(circle at 12% 12%,rgba(217,227,211,.95),transparent 30%),linear-gradient(135deg,var(--paper),var(--sand))}.hero-grid,.page-hero-grid,.split-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(34px,6vw,68px);line-height:1.08;margin:12px 0 22px;letter-spacing:-.04em}.lead,.page-hero p{font-size:18px;color:var(--soft-ink)}.eyebrow{margin:0 0 10px;color:var(--green-2);font-weight:800;letter-spacing:.18em;text-transform:uppercase;font-size:13px}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 22px;font-weight:800;border:1px solid var(--green);transition:.2s ease}.btn.primary{background:var(--green);color:var(--paper)}.btn.ghost{background:transparent;color:var(--green)}.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(38,75,58,.18)}.trust-list{display:grid;gap:8px;margin:22px 0 0;padding:0;list-style:none;color:var(--soft-ink)}.trust-list li{position:relative;padding-left:22px}.trust-list li:before{content:"";position:absolute;left:0;top:.65em;width:8px;height:8px;border-radius:50%;background:var(--green-2)}.hero-visual,.image-panel{margin:0;background:rgba(255,255,255,.62);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.hero-visual figcaption{font-size:14px;color:var(--soft-ink);text-align:center;margin-top:12px}
.section{padding:78px 0}.section.muted{background:#eef3ea}.section.pale{background:var(--sand)}.section-head{max-width:780px;margin:0 auto 38px;text-align:center}.section-head.narrow{max-width:680px}.section-head h2,.split-grid h2,.contact-card h2,.message-form h2{font-size:clamp(28px,4vw,44px);line-height:1.18;margin:0 0 16px;letter-spacing:-.03em}.section-head p,.split-grid p{color:var(--soft-ink)}
.card-grid{display:grid;gap:22px}.card-grid.four{grid-template-columns:repeat(4,1fr)}.topic-card,.video-card,.recommend-grid article,.feature-row article,.map-node,.study-grid article,.learning-steps article,.value-panel article,.plan-card,.contact-card,.message-form{background:rgba(255,250,240,.86);border:1px solid var(--line);border-radius:22px;box-shadow:0 16px 40px rgba(30,39,34,.08)}.topic-card{padding:16px}.topic-card img{border-radius:16px;margin-bottom:16px;background:var(--sand)}.topic-card span,.tag,.recommend-grid span,.map-node span{display:inline-flex;font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--green);background:var(--sage);border-radius:999px;padding:5px 10px}.topic-card h3,.video-card h3,.video-card h2,.recommend-grid h3,.feature-row h3,.map-node h2,.study-grid h3,.learning-steps h2{margin:12px 0 8px;line-height:1.25}.topic-card p,.video-card p,.recommend-grid p,.feature-row p,.map-node p,.study-grid p,.learning-steps p{color:var(--soft-ink);margin:0}.split-section{background:linear-gradient(180deg,var(--paper),#f7f1e7)}.split-grid.reverse{grid-template-columns:.95fr 1.05fr}.mini-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.mini-list span{padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,250,240,.8);color:var(--green);font-weight:700}.text-link{display:inline-flex;margin-top:18px;color:var(--green);font-weight:800;border-bottom:2px solid var(--green)}
.feature-row,.recommend-grid,.video-grid,.study-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.feature-row article{padding:26px}.feature-row strong,.learning-steps span{font-size:38px;color:rgba(38,75,58,.25);font-weight:900}.path-list{counter-reset:path;margin:24px 0 0;padding:0;list-style:none;display:grid;gap:14px}.path-list li{background:rgba(255,250,240,.78);border:1px solid var(--line);border-radius:18px;padding:16px 18px;color:var(--soft-ink)}.path-list span{display:block;color:var(--green);font-weight:800}.video-grid{grid-template-columns:repeat(3,1fr)}.video-card{overflow:hidden}.video-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--sage)}.video-body{padding:20px}.video-body a{display:inline-flex;margin-top:14px;font-weight:800;color:var(--green)}.recommend-grid article{padding:24px}.note-stack{display:grid;gap:14px}.note-stack div,.plan-card div{display:flex;gap:14px;align-items:flex-start;padding:18px;border-radius:18px;background:rgba(255,250,240,.78);border:1px solid var(--line)}.note-stack strong,.plan-card strong{color:var(--green);min-width:74px}.note-stack span,.plan-card span{color:var(--soft-ink)}.note-stack.compact strong{min-width:52px}.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px}.faq-list details{background:rgba(255,250,240,.9);border:1px solid var(--line);border-radius:18px;padding:18px 20px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--green)}.faq-list p{color:var(--soft-ink);margin:12px 0 0}.contact-cta{padding-top:0}.cta-card{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:36px;border-radius:28px;background:var(--green);color:var(--paper);box-shadow:var(--shadow)}.cta-card .eyebrow,.cta-card p{color:rgba(255,250,240,.78)}.cta-card h2{font-size:clamp(26px,4vw,42px);line-height:1.15;margin:0 0 10px}.cta-card .btn{border-color:var(--paper);background:var(--paper);color:var(--green)}
.page-hero{padding:72px 0;background:linear-gradient(135deg,#eef3ea,var(--sand))}.page-hero img{background:rgba(255,255,255,.6);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:14px}.value-panel{display:grid;gap:14px}.value-panel article{padding:20px}.value-panel span{color:rgba(38,75,58,.3);font-size:30px;font-weight:900}.pill-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.pill-grid article{border:1px solid var(--line);border-radius:20px;padding:20px;background:rgba(255,250,240,.8)}.pill-grid strong{display:block;color:var(--green);font-size:22px}.pill-grid span{color:var(--soft-ink);font-size:14px}.check-list{list-style:none;padding:0;margin:22px 0;display:grid;gap:12px}.check-list li{position:relative;padding-left:26px;color:var(--soft-ink)}.check-list li:before{content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:3px;background:var(--green)}
.filter-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:30px}.filter-btn{border:1px solid var(--line);background:var(--paper);color:var(--green);padding:10px 16px;border-radius:999px;font-weight:800;cursor:pointer}.filter-btn.is-active{background:var(--green);color:var(--paper)}.filter-grid .video-card.is-hidden{display:none}.topic-map{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:20px}.map-node{padding:24px}.map-node.large{grid-row:span 2;background:linear-gradient(145deg,var(--green),#5f7f65);color:var(--paper)}.map-node.large span{background:rgba(255,250,240,.2);color:var(--paper)}.map-node.large p{color:rgba(255,250,240,.8)}.timeline{max-width:850px;margin:0 auto;display:grid;gap:18px;position:relative}.timeline article{padding:22px 22px 22px 30px;border-left:4px solid var(--green);background:rgba(255,250,240,.84);border-radius:0 20px 20px 0}.timeline span{font-weight:900;color:var(--green)}.learning-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.learning-steps article{padding:26px}.plan-card{padding:10px;display:grid;gap:10px}.study-grid{grid-template-columns:repeat(4,1fr)}.study-grid article{padding:22px}.media-card .video-body{min-height:235px}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:start}.contact-card,.message-form{padding:28px}.domain-box{padding:16px 18px;border-radius:16px;background:#1f352b;color:var(--paper);font-weight:800;word-break:break-all}.message-form{display:grid;gap:16px}.message-form label{display:grid;gap:8px;color:var(--green);font-weight:800}.message-form input,.message-form select,.message-form textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:#fffdf7;color:var(--ink);font:inherit}.form-note{margin:0;border:1px solid rgba(63,107,85,.35);background:var(--sage);border-radius:14px;padding:12px;color:var(--green)}
.site-footer{background:#18231d;color:rgba(255,250,240,.78);padding:58px 0 28px}.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:28px}.footer-brand{display:inline-block;color:var(--paper);font-size:26px;font-weight:900;margin-bottom:12px}.site-footer h2{font-size:18px;color:var(--paper);margin:0 0 12px}.site-footer p{margin:0 0 8px}.footer-bottom{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,250,240,.14);display:flex;justify-content:space-between;gap:18px}.footer-bottom a{color:var(--paper);font-weight:800}
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