:root{--font-main: "PDFRover Sans", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", "Helvetica Neue", Arial, sans-serif;--text-main: #102a43;--text-soft: #334e68;--surface-1: rgba(255, 255, 255, .82);--surface-2: rgba(255, 255, 255, .62);--border: rgba(16, 42, 67, .15);--accent: #0d9488;--accent-strong: #0f766e;--accent-warm: #e76f51;--shadow: 0 18px 48px rgba(16, 42, 67, .18)}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{font-family:var(--font-main);color:var(--text-main);background:radial-gradient(circle at 0% 0%,rgba(13,148,136,.2),transparent 35%),radial-gradient(circle at 100% 10%,rgba(231,111,81,.26),transparent 40%),linear-gradient(165deg,#f1f7f8,#e3f1f2 45%,#f8f3ea);line-height:1.6}a{color:inherit;text-decoration:none}.site-shell{max-width:1120px;margin:0 auto;padding:24px 18px 40px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:24px}.brand{font-weight:800;letter-spacing:.02em;font-size:1.2rem}.main-nav{display:flex;align-items:center;gap:14px}.main-nav a{padding:8px 12px;border-radius:999px;color:var(--text-soft);font-weight:500}.main-nav a.is-active{background:#0d948821;color:var(--accent-strong)}.topbar-usage{padding:8px 12px;border-radius:999px;color:var(--text-soft);font-weight:500;font-size:.95rem}.lang-switch{display:flex;align-items:center;gap:10px}.lang-switch a{font-size:.92rem;padding:6px 10px;border-radius:999px;border:1px solid transparent}.lang-switch a.is-active{border-color:var(--border);background:#ffffff94}.panel{background:linear-gradient(160deg,var(--surface-1),var(--surface-2));border:1px solid var(--border);box-shadow:var(--shadow);border-radius:18px;padding:24px}.hero .eyebrow{margin:0;font-size:.86rem;text-transform:uppercase;letter-spacing:.14em;color:var(--accent-strong)}.hero h1{margin:10px 0 8px;font-size:clamp(1.9rem,3.2vw,2.9rem);line-height:1.1}.hero-value{margin:0;font-size:1.05rem;font-weight:600;color:var(--accent-strong);max-width:760px}.hero p{margin:0;max-width:760px;color:var(--text-soft)}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid transparent;font-weight:600;font-size:.95rem;padding:10px 16px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 12px 28px #0d948859}.btn-primary:hover{background:var(--accent-strong)}.btn-muted{background:#ffffffad;border-color:var(--border)}.section-head{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}.section-head h2{margin:0;font-size:1.35rem}.section-head p{margin:0;color:var(--text-soft)}.footer{margin-top:24px;display:flex;justify-content:space-between;gap:16px;color:var(--text-soft);font-size:.92rem}.reveal{animation:rise-in .56s ease both}@keyframes rise-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media(max-width:840px){.site-shell{padding:14px 12px 28px}.topbar{flex-wrap:wrap;margin-bottom:16px}.panel{padding:18px}.footer{flex-direction:column}}