:root {
    --bg-main: linear-gradient(135deg, #eefdf7 0%, #f7fffc 55%, #ffffff 100%);
    --bg-soft: linear-gradient(135deg, #f2fef8 0%, #ffffff 100%);
    --panel: rgba(255, 255, 255, 0.92);
    --card: #ffffff;
    --text-strong: #123f34;
    --text-body: #5d746e;
    --primary: #16a085;
    --accent: #00b4d8;
    --line: rgba(22, 160, 133, 0.12);
    --shadow: 0 20px 50px rgba(18, 86, 77, 0.12);
    --radius-lg: 26px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--text-body); line-height: 1.7; background: var(--bg-main); }
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }
.site-nav { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(14px); background: rgba(255,255,255,.82); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--primary); font-size: 24px; font-weight: 800; }
.logo img { width: 34px; height: 34px; }
.nav-links { display: flex; gap: 22px; flex-wrap: wrap; }
.nav-links a { color: var(--text-strong); font-weight: 700; opacity: .85; }
.nav-links a[aria-current="page"], .nav-links a:hover { color: var(--primary); opacity: 1; }
.hero, .section { padding: 76px 0; }
.hero-grid, .split-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(280px,.9fr); gap: 34px; align-items: center; }
.eyebrow { display:inline-flex; padding:7px 14px; margin-bottom:16px; border-radius:999px; background: rgba(22,160,133,.12); color:var(--primary); font-weight:800; font-size:14px; letter-spacing:.04em; }
h1,h2,h3 { color: var(--text-strong); line-height:1.15; }
h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); margin-bottom:18px; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom:14px; }
p { color: var(--text-body); }
.hero-copy p,.section-head p { font-size:1.08rem; }
.hero-actions { display:flex; flex-wrap:wrap; gap:14px; margin-top:28px; }
.btn { display:inline-flex; align-items:center; justify-content:center; min-height:58px; padding:0 30px; border-radius:999px; font-weight:800; transition: transform .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color:#fff; background: linear-gradient(135deg,var(--primary),var(--accent)); box-shadow:0 16px 34px rgba(22,160,133,.22); }
.btn-secondary { color: var(--primary); background: rgba(22,160,133,.1); }
.btn-wide { width:100%; min-height:60px; font-size:18px; }
.hero-points,.site-footer ul,.faq-list { list-style:none; }
.hero-points { display:grid; gap:12px; margin-top:24px; }
.hero-points li,.mini-list li { position:relative; padding-left:22px; }
.hero-points li::before,.mini-list li::before { content:""; position:absolute; left:0; top:11px; width:9px; height:9px; border-radius:50%; background: linear-gradient(135deg,var(--primary),var(--accent)); }
.visual-box,.metric-box,.card,.faq-item,.notice-box,.download-card { background: var(--panel); border:1px solid rgba(255,255,255,.8); border-radius:var(--radius-lg); box-shadow:var(--shadow); }
.visual-box { min-height:360px; padding:28px; position:relative; overflow:hidden; }
.visual-box::before,.visual-box::after { content:""; position:absolute; border-radius:50%; background: linear-gradient(135deg, rgba(22,160,133,.18), rgba(0,180,216,.08)); }
.visual-box::before { width:210px; height:210px; right:-30px; top:-30px; }
.visual-box::after { width:160px; height:160px; left:24px; bottom:-34px; }
.visual-stack { position:relative; z-index:1; display:grid; gap:16px; }
.bubble { padding:18px 20px; border-radius:20px; background:#fff; border:1px solid var(--line); }
.section-soft { background: var(--bg-soft); }
.section-head { max-width:760px; margin-bottom:34px; }
.grid-3,.download-grid,.faq-grid { display:grid; gap:22px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(230px,1fr)); }
.download-grid { grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); }
.card,.download-card,.metric-box,.notice-box { padding:28px; }
.card-icon { width:56px; height:56px; margin-bottom:16px; display:inline-flex; align-items:center; justify-content:center; border-radius:16px; background: rgba(22,160,133,.12); font-size:28px; }
.mini-list { display:grid; gap:12px; margin-top:18px; }
.faq-grid { grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); }
.faq-item { padding:24px; }
.site-footer { padding:48px 0 24px; background:#13362f; color: rgba(255,255,255,.82); }
.footer-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap:26px; }
.site-footer h3,.site-footer a:hover { color:#fff; }
.site-footer ul { display:grid; gap:10px; }
.footer-bottom { margin-top:24px; padding-top:16px; border-top:1px solid rgba(255,255,255,.12); font-size:14px; }
@media (max-width:900px) { .hero-grid,.split-grid { grid-template-columns:1fr; } }
@media (max-width:720px) { .nav-wrap { padding:14px 0; align-items:flex-start; flex-direction:column; } .hero,.section { padding:58px 0; } .btn,.btn-wide { width:100%; } }