:root{
    --green:#143d32;
    --green-2:#1f5948;
    --sage:#dfe7dc;
    --cream:#f6f0e4;
    --paper:#fffaf0;
    --ink:#26302d;
    --muted:#66716c;
    --line:rgba(20,61,50,.14);
    --shadow:0 22px 60px rgba(20,61,50,.12);
    --radius:28px;
}
*{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:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1160px,92vw);margin:0 auto}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--green);color:#fff;padding:8px 12px;border-radius:8px;z-index:20}
.skip-link:focus{left:12px}
.site-header{position:sticky;top:0;z-index:10;background:rgba(255,250,240,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--green);font-size:22px;letter-spacing:.03em}
.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.main-nav a{padding:9px 13px;border-radius:999px;color:#3c4743;font-size:15px}
.main-nav a:hover,.main-nav a.active{background:var(--green);color:#fff}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--green);border-radius:12px;padding:6px 10px;font-size:22px}
.hero{position:relative;overflow:hidden}
.hero-home{padding:74px 0 44px;background:radial-gradient(circle at 78% 22%,rgba(223,231,220,.8),transparent 34%),linear-gradient(135deg,var(--cream),#eef4ee 70%,#fffaf0)}
.inner-hero{padding:70px 0;background:linear-gradient(135deg,#f6f0e4,#e5ede2)}
.hero-grid,.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.reverse{grid-template-columns:.95fr 1.05fr}
.hero-copy h1,.inner-hero h1{font-size:clamp(38px,6vw,68px);line-height:1.08;margin:14px 0 22px;color:var(--green);letter-spacing:-.03em}
.inner-hero h1{font-size:clamp(34px,5vw,56px)}
.hero-copy p,.inner-hero p,.section-head p{font-size:18px;color:#47534e;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:800;color:var(--green-2);letter-spacing:.08em;text-transform:uppercase}
.eyebrow:before{content:"";width:28px;height:1px;background:var(--green-2);display:inline-block}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;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:#fff;box-shadow:0 16px 34px rgba(20,61,50,.2)}
.btn-primary:hover{transform:translateY(-2px);background:#0f3028}
.btn-ghost{color:var(--green);background:rgba(255,255,255,.45)}
.btn-ghost:hover{background:#fff}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:560px;margin:24px 0 0}
.hero-stats div{background:rgba(255,250,240,.8);border:1px solid var(--line);border-radius:22px;padding:14px 18px}
.hero-stats dt{font-size:28px;color:var(--green);font-weight:900}
.hero-stats dd{margin:0;color:var(--muted)}
.hero-art,.feature-img{filter:drop-shadow(0 26px 50px rgba(20,61,50,.16))}
.section{padding:82px 0}
.muted{background:#edf3ed}
.section-head{margin-bottom:34px;max-width:820px}
.section-head h2,.two-col h2,.contact-card h2,.quote-card p{font-size:clamp(28px,4vw,44px);line-height:1.18;color:var(--green);margin:12px 0 12px;letter-spacing:-.02em}
.category-grid,.topic-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.category-card,.topic-card,.column-grid article,.path-cards article,.plan-card,.contact-info,.message-form,.quote-card,.video-card{background:rgba(255,250,240,.92);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.category-card{padding:18px;min-height:245px}
.category-card img{height:112px;object-fit:contain;margin-bottom:12px;border-radius:18px;background:#f2eddf}
.category-card h3,.path-cards h3,.column-grid h3,.video-card h3,.video-card h2,.topic-card h2,.plan-card h2,.contact-info h2{color:var(--green);line-height:1.25;margin:8px 0 8px}
.category-card p,.path-cards p,.column-grid p,.video-card p,.topic-card p,.plan-card p,.contact-info p,.form-note{color:var(--muted);margin:0}
.check-list{padding:0;margin:24px 0 0;list-style:none;display:grid;gap:12px}
.check-list li{position:relative;padding-left:28px;color:#3f4b46}
.check-list li:before{content:"";position:absolute;left:0;top:.72em;width:10px;height:10px;border-radius:50%;background:var(--green-2);box-shadow:0 0 0 5px rgba(31,89,72,.12)}
.info-row{display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding:15px 0;color:#46514d}
.info-row span:first-child{font-weight:800;color:var(--green)}
.text-link{display:inline-flex;margin-top:18px;color:var(--green);font-weight:900;border-bottom:2px solid var(--green)}
.path-cards,.column-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.path-cards article,.column-grid article{padding:24px}
.path-cards article span{display:inline-flex;min-width:42px;height:42px;border-radius:50%;align-items:center;justify-content:center;background:var(--green);color:#fff;font-weight:900;margin-bottom:14px}
.column-grid{grid-template-columns:repeat(3,1fr)}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.video-card{overflow:hidden}
.video-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#ebe3d4}
.video-card div{padding:20px}
.video-card.large{display:grid;grid-template-columns:42% 1fr;grid-column:auto / span 1}
.video-card.large img{height:100%;aspect-ratio:auto;object-fit:cover}
.tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--sage);color:var(--green);font-weight:800;font-size:13px}
.faq-wrap{max-width:900px}
details{background:rgba(255,250,240,.95);border:1px solid var(--line);border-radius:22px;margin:14px 0;padding:18px 22px;box-shadow:0 14px 35px rgba(20,61,50,.08)}
summary{cursor:pointer;font-weight:900;color:var(--green);font-size:18px}
details p{color:var(--muted);margin:12px 0 0}
.contact-band{background:linear-gradient(135deg,var(--green),#244f43);color:#fff}
.contact-card{display:flex;align-items:center;justify-content:space-between;gap:26px}
.contact-card h2,.contact-card p,.contact-card .eyebrow{color:#fff}.contact-card .eyebrow:before{background:#fff}
.prose-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prose-grid article{padding:28px;border-radius:var(--radius);background:#fffaf0;border:1px solid var(--line);box-shadow:var(--shadow)}
.prose-grid h2{color:var(--green);margin-top:0}.prose-grid p{color:var(--muted)}
.quote-card{padding:42px;text-align:center}.quote-card p{margin:0;max-width:900px;margin-inline:auto}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filter-btn{border:1px solid var(--line);background:#fffaf0;color:var(--green);border-radius:999px;padding:10px 18px;font-weight:900;cursor:pointer}
.filter-btn.active,.filter-btn:hover{background:var(--green);color:#fff}
.topic-grid{grid-template-columns:repeat(3,1fr)}
.topic-card{padding:20px}.topic-card img{height:150px;object-fit:contain;background:#f1eadc;border-radius:22px;margin-bottom:16px}.topic-card span{font-weight:900;color:var(--green-2)}
.learning-layout,.contact-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:start}
.timeline-list{display:grid;gap:18px}.timeline-list article{position:relative;padding:26px 28px 26px 76px;background:#fffaf0;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.timeline-list article span{position:absolute;left:24px;top:28px;background:var(--green);color:#fff;border-radius:999px;padding:5px 10px;font-weight:900;font-size:13px}.timeline-list h2{color:var(--green);margin:0 0 8px}.timeline-list p{color:var(--muted);margin:0}
.plan-card,.contact-info,.message-form{padding:28px}.plan-card ul{margin:18px 0 0;padding-left:20px;color:#46514d}.plan-card li{margin:8px 0}
.domain-box{font-weight:900;color:var(--green);background:var(--sage);padding:16px 18px;border-radius:18px;word-break:break-all}
.message-form{display:grid;gap:14px}.message-form label{display:grid;gap:7px;font-weight:900;color:var(--green)}
input,select,textarea{width:100%;border:1px solid var(--line);background:#fffef8;border-radius:16px;padding:12px 14px;font:inherit;color:var(--ink)}
textarea{resize:vertical}.message-form .btn{width:max-content;cursor:pointer}
.site-footer{background:#0f3028;color:#e9f0e8;padding:52px 0 24px}.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}.site-footer p{color:#c9d7d1;margin:8px 0 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:18px;color:#c9d7d1;font-size:14px}
@media (max-width:980px){.hero-grid,.two-col,.reverse,.learning-layout,.contact-layout{grid-template-columns:1fr}.category-grid{grid-template-columns:repeat(2,1fr)}.topic-grid,.video-grid,.prose-grid,.column-grid,.path-cards{grid-template-columns:1fr 1fr}.video-card.large{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.contact-card{align-items:flex-start;flex-direction:column}.hero-home{padding-top:54px}}
@media (max-width:720px){.header-inner{min-height:66px}.nav-toggle{display:inline-flex}.main-nav{position:absolute;left:4vw;right:4vw;top:68px;background:#fffaf0;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{padding:12px 14px}.hero-stats,.category-grid,.topic-grid,.video-grid,.prose-grid,.column-grid,.path-cards,.footer-grid{grid-template-columns:1fr}.section{padding:58px 0}.hero-copy h1,.inner-hero h1{font-size:36px}.contact-card h2,.section-head h2,.two-col h2{font-size:30px}.footer-bottom{flex-direction:column}.timeline-list article{padding-left:26px}.timeline-list article span{position:static;margin-bottom:10px;display:inline-flex}.message-form .btn{width:100%}}