:root{
  --ink:#1f2723;
  --deep:#13382f;
  --deep-2:#1e4b3f;
  --moss:#6f8b70;
  --sand:#f5efe3;
  --paper:#fbf8ef;
  --line:#d9d0bf;
  --muted:#67726c;
  --warm:#c6a978;
  --shadow:0 24px 60px rgba(23,45,39,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92vw);margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,239,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(31,39,35,.08)}
.nav-wrap{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--deep)}
.brand-mark{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:16px;background:var(--deep);color:var(--sand);letter-spacing:.5px;box-shadow:0 10px 24px rgba(19,56,47,.22)}
.brand-text{font-size:18px;letter-spacing:.08em}
.main-nav{display:flex;align-items:center;gap:8px;font-size:15px;color:#34433d}
.main-nav a{padding:10px 14px;border-radius:999px;transition:.2s ease}
.main-nav a:hover,.main-nav a.active{background:#e8deca;color:var(--deep)}
.nav-toggle{display:none;background:transparent;border:0;padding:8px;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--deep);margin:5px 0;border-radius:2px}
.hero{position:relative;overflow:hidden;padding:72px 0 46px;background:linear-gradient(135deg,#f8f2e7 0%,#edf1e5 52%,#dfe9df 100%)}
.hero::before{content:"";position:absolute;inset:auto -18vw -30vw auto;width:56vw;height:56vw;background:radial-gradient(circle,rgba(30,75,63,.2),rgba(30,75,63,0) 66%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:58px;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border:1px solid rgba(19,56,47,.16);border-radius:999px;background:rgba(255,255,255,.5);color:var(--deep);font-weight:700;font-size:14px}
h1,h2,h3{line-height:1.22;margin:0;color:var(--deep)}
h1{font-size:clamp(36px,5vw,68px);letter-spacing:-.04em;margin-top:22px}
.hero p{font-size:18px;color:#44524c;margin:24px 0 0;max-width:720px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.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(--sand);box-shadow:0 14px 30px rgba(19,56,47,.24)}
.btn.ghost{background:rgba(255,255,255,.3);color:var(--deep)}
.btn:hover{transform:translateY(-2px)}
.hero-media{position:relative}
.hero-card{border:1px solid rgba(19,56,47,.14);background:rgba(255,255,255,.48);border-radius:32px;padding:22px;box-shadow:var(--shadow)}
.hero-card img{border-radius:24px;border:1px solid rgba(19,56,47,.12);background:#efe6d5}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.hero-stats span{display:block;padding:14px;border-radius:18px;background:rgba(19,56,47,.08);color:#31413a;font-size:13px}
.hero-stats strong{display:block;color:var(--deep);font-size:21px}
.section{padding:76px 0}
.section.soft{background:#f1eadc}
.section.dark{background:var(--deep);color:var(--sand)}
.section.dark h2,.section.dark h3{color:var(--sand)}
.section.dark .section-intro{color:#d9e2d6}
.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:30px}
.section-kicker{color:var(--moss);font-weight:800;letter-spacing:.12em;font-size:13px;text-transform:uppercase;margin-bottom:10px}
.section h2{font-size:clamp(28px,3.4vw,44px)}
.section-intro{max-width:680px;color:var(--muted);margin:13px 0 0}
.grid{display:grid;gap:22px}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.card{background:rgba(255,255,255,.72);border:1px solid rgba(31,39,35,.1);border-radius:28px;padding:24px;box-shadow:0 12px 34px rgba(31,39,35,.06)}
.card img{width:100%;border-radius:20px;background:#eee4d2;border:1px solid rgba(31,39,35,.08);margin-bottom:18px}
.card h3{font-size:22px;margin-bottom:10px}
.card p{margin:0;color:#5d6862}
.card .tag,.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:#e6ddcb;color:var(--deep);font-size:13px;font-weight:700;margin-bottom:12px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0}
.meta-row span{font-size:13px;border:1px solid rgba(19,56,47,.16);border-radius:999px;padding:4px 10px;color:#40524a;background:rgba(255,255,255,.55)}
.split{display:grid;grid-template-columns:.92fr 1.08fr;gap:34px;align-items:center}
.panel{background:rgba(255,255,255,.7);border:1px solid rgba(31,39,35,.1);border-radius:34px;padding:32px;box-shadow:var(--shadow)}
.list-clean{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:14px}
.list-clean li{padding-left:28px;position:relative;color:#4e5b55}
.list-clean li::before{content:"";position:absolute;left:0;top:.72em;width:10px;height:10px;border-radius:50%;background:var(--warm);box-shadow:0 0 0 5px rgba(198,169,120,.18)}
.timeline{position:relative;display:grid;gap:18px;margin-top:28px}
.timeline::before{content:"";position:absolute;left:20px;top:12px;bottom:12px;width:2px;background:rgba(19,56,47,.16)}
.timeline-item{position:relative;padding-left:58px}
.timeline-item::before{content:"";position:absolute;left:9px;top:6px;width:24px;height:24px;border-radius:50%;background:var(--deep);border:6px solid #eee4d2}
.timeline-item h3{font-size:20px;margin-bottom:6px}
.video-card{overflow:hidden;padding:0}
.video-cover{position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:28px 28px 0 0;background:#e6ddcb}
.video-cover img{height:100%;object-fit:cover;border-radius:0;margin:0;border:0}
.play-dot{position:absolute;left:22px;bottom:22px;width:52px;height:52px;border-radius:50%;background:rgba(19,56,47,.9);display:grid;place-items:center;color:#fff;font-weight:900}
.video-body{padding:22px}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.filter-btn{border:1px solid rgba(19,56,47,.18);background:rgba(255,255,255,.55);padding:9px 14px;border-radius:999px;color:var(--deep);font-weight:700;cursor:pointer}
.filter-btn.active{background:var(--deep);color:var(--sand)}
.faq{display:grid;gap:12px}
details{border:1px solid rgba(19,56,47,.12);border-radius:22px;background:rgba(255,255,255,.64);padding:18px 20px}
summary{cursor:pointer;color:var(--deep);font-weight:800}
details p{margin:12px 0 0;color:#56625d}
.page-hero{padding:74px 0 48px;background:linear-gradient(140deg,#f4eddc,#e5eee1)}
.page-hero p{max-width:760px;color:#4d5a54;font-size:18px}
.breadcrumb{font-size:14px;color:#65736c;margin-bottom:18px}
.breadcrumb a{color:var(--deep);font-weight:700}
.contact-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px}
.form-grid{display:grid;gap:14px}
label{display:grid;gap:6px;font-weight:700;color:var(--deep)}
input,textarea,select{width:100%;border:1px solid rgba(19,56,47,.18);border-radius:16px;background:#fffaf1;padding:13px 14px;font:inherit;color:var(--ink)}
textarea{min-height:140px;resize:vertical}
.notice{display:none;margin-top:14px;padding:12px 14px;border-radius:16px;background:#e8deca;color:var(--deep);font-weight:700}
.site-footer{background:#102d27;color:#e9e0cf;padding:44px 0}
.footer-grid{display:grid;grid-template-columns:1.3fr .7fr 1fr;gap:30px}
.site-footer p{margin:10px 0;color:#cdd6cc}
.site-footer h3{font-size:17px;color:#f6eddd;margin-bottom:12px}
.site-footer a{display:block;color:#e9e0cf;margin:8px 0}
.footer-brand{font-size:20px;color:#fff}
@media (max-width:920px){
  .hero-grid,.split,.contact-box{grid-template-columns:1fr}
  .grid.three,.grid.four{grid-template-columns:repeat(2,1fr)}
  .section-head{display:block}
  .main-nav{position:absolute;left:4vw;right:4vw;top:68px;display:none;flex-direction:column;align-items:stretch;background:var(--paper);padding:14px;border-radius:24px;border:1px solid rgba(19,56,47,.12);box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
}
@media (max-width:620px){
  .hero{padding-top:44px}
  .grid.three,.grid.four,.footer-grid,.hero-stats{grid-template-columns:1fr}
  .section{padding:56px 0}
  .card,.panel{border-radius:22px;padding:20px}
  .hero-card{border-radius:24px;padding:14px}
  h1{font-size:36px}
}