:root{
  --bg:#f7f6f1;
  --panel:#ffffff;
  --ink:#1f2937;
  --muted:#5f6b7a;
  --line:#e6e2d8;
  --brand:#245b4f;
  --brand-2:#f2b84b;
  --soft:#eaf3ef;
  --shadow:0 18px 50px rgba(31,41,55,.10);
}
*{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:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block;border-radius:24px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,241,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top-nav{display:flex;align-items:center;justify-content:space-between;gap:22px;max-width:1180px;margin:auto;padding:14px 20px}
.logo,.footer-logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--brand)}
.logo img,.footer-logo img{border-radius:12px;box-shadow:0 6px 16px rgba(36,91,79,.16)}
.nav-links{display:flex;gap:16px;list-style:none;padding:0;margin:0;align-items:center;flex-wrap:wrap}
.nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px}
.nav-links a:hover{background:var(--soft);color:var(--brand)}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:8px 14px}
.site-search{max-width:1180px;margin:0 auto 14px;padding:0 20px;display:grid;grid-template-columns:auto minmax(180px,1fr) auto;gap:10px;align-items:center}
.site-search label{font-weight:700;color:var(--brand);font-size:14px}
.site-search input{width:100%;border:1px solid var(--line);border-radius:999px;padding:12px 16px;background:white;outline:none}
.site-search input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(36,91,79,.10)}
.site-search button,.btn,.copy-link{border:0;border-radius:999px;background:var(--brand);color:white;padding:12px 18px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.search-tip{grid-column:2 / 4;margin:0;font-size:13px;color:var(--muted)}
.hero,.page-hero{max-width:1180px;margin:0 auto;padding:64px 20px;display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
.page-hero{display:block;text-align:left;padding-bottom:34px}
.breadcrumb,.eyebrow{color:var(--brand);font-weight:800;letter-spacing:.02em;margin:0 0 10px}
h1,h2,h3{line-height:1.25;margin:0 0 14px;color:#17231f}
h1{font-size:clamp(34px,5vw,62px);letter-spacing:-.04em}
h2{font-size:clamp(26px,3vw,38px);letter-spacing:-.03em}
h3{font-size:21px}
p{margin:0 0 14px}.hero-lead,.page-hero p{font-size:18px;color:var(--muted)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.btn.primary{background:var(--brand)}.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--line)}
.hero-points{display:flex;gap:12px;list-style:none;margin:18px 0 0;padding:0;flex-wrap:wrap}.hero-points li,.tags span{background:var(--soft);color:var(--brand);font-weight:700;border-radius:999px;padding:8px 12px;font-size:14px}
.hero-media figcaption,figure figcaption{font-size:13px;color:var(--muted);margin-top:10px}.hero-media img{box-shadow:var(--shadow)}
.section{max-width:1180px;margin:0 auto;padding:58px 20px}.section.accent{background:linear-gradient(180deg,#eef7f2,#fbfaf6);max-width:none}.section.accent>*{max-width:1180px;margin-left:auto;margin-right:auto}.section-head{max-width:760px;margin-bottom:28px}.section-head p{color:var(--muted)}
.card-grid,.video-grid,.review-grid,.faq-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.review-grid,.faq-grid{grid-template-columns:repeat(3,1fr)}
.card,.review-grid article,.faq-grid article,.scenario-list article,.timeline article,.video-card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 8px 26px rgba(31,41,55,.06)}
.card .icon{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:16px;background:var(--soft);font-size:24px;margin-bottom:10px}.card p,.video-card p,.review-grid p,.faq-grid p,.scenario-list p,.timeline p,.rich-list{color:var(--muted)}
.video-grid{grid-template-columns:repeat(3,1fr)}.video-card{overflow:hidden}.video-frame{position:relative;border-radius:20px;overflow:hidden;background:#10261f;aspect-ratio:16/10;margin-bottom:16px}.video-frame video{width:100%;height:100%;object-fit:cover;display:block}.play-button{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.86);width:62px;height:62px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.92);color:var(--brand);font-weight:900;box-shadow:0 16px 36px rgba(0,0,0,.22);opacity:0;transition:.2s}.video-card:hover .play-button,.video-card.is-hover .play-button{opacity:1;transform:translate(-50%,-50%) scale(1)}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.metrics{font-size:13px;color:var(--brand)!important;font-weight:700}
.scenario-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.split{display:grid;grid-template-columns:1fr .9fr;gap:34px;align-items:center}.steps{padding-left:20px}.steps li{margin-bottom:12px;color:var(--muted)}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.timeline time{display:inline-block;color:var(--brand);font-weight:800;margin-bottom:8px}.rich-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;list-style:none;padding:0;margin:0}.rich-list li{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:18px}.contact-block{display:flex;align-items:center;justify-content:space-between;gap:24px;background:var(--brand);color:white;border-radius:34px;margin-bottom:60px}.contact-block h2,.contact-block .eyebrow,.contact-block p{color:white}.contact-block .btn{background:white;color:var(--brand)}
.site-footer{background:#15231f;color:#dfe8e3;padding:44px 20px 22px}.footer-grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:28px}.site-footer h2{font-size:18px;color:white}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin-bottom:8px}.site-footer a{color:#dfe8e3}.site-footer p{color:#b8c8c1}.copyright{max-width:1180px;margin:26px auto 0;border-top:1px solid rgba(255,255,255,.14);padding-top:18px;font-size:14px}
@media (max-width:920px){.hero{grid-template-columns:1fr}.card-grid,.video-grid,.review-grid,.faq-grid,.scenario-list,.timeline,.rich-list,.footer-grid,.split{grid-template-columns:1fr 1fr}.contact-block{display:block}.contact-block .btn{margin-top:18px}.nav-toggle{display:inline-flex}.nav-links{display:none;position:absolute;left:20px;right:20px;top:70px;background:white;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow)}.nav-links.open{display:grid}.site-search{grid-template-columns:1fr}.search-tip{grid-column:auto}}
@media (max-width:620px){.hero,.page-hero{padding:38px 16px}.section{padding:42px 16px}.card-grid,.video-grid,.review-grid,.faq-grid,.scenario-list,.timeline,.rich-list,.footer-grid,.split{grid-template-columns:1fr}h1{font-size:34px}.site-search{padding:0 16px 12px}.top-nav{padding:12px 16px}.hero-actions{display:grid}.btn{width:100%}}