:root{--ink:#1c2b27;--jade:#1f6f5c;--jade-soft:#e7f1ed;--gold:#c8a35b;--gold-soft:#f6efdf;--bg:#f7f8f6;--card:#fff;--line:#e4e8e4;--muted:#66756f;--shadow:0 8px 30px rgba(28,43,39,.08);--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
.wrap{width:min(1100px,92%);margin:0 auto}
html.lang-zh .t-en{display:none}html.lang-en .t-zh{display:none}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;padding:14px 0}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700}
.logo-mark{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--jade),#2c8f76);color:#fff;font-size:18px;box-shadow:var(--shadow)}
.brand-name{font-size:17px}.nav{margin-left:auto;display:flex;gap:22px}.nav a{color:var(--muted);text-decoration:none;font-size:15px}.nav a:hover{color:var(--jade)}
.lang-btn{border:1px solid var(--line);background:#fff;color:var(--jade);border-radius:999px;padding:7px 16px;cursor:pointer;font-weight:600;transition:.2s}.lang-btn:hover{border-color:var(--jade);background:var(--jade-soft)}
.hero{padding:70px 0 50px;background:radial-gradient(1200px 400px at 70% -10%,var(--jade-soft),transparent)}.eyebrow{color:var(--gold);font-weight:700;letter-spacing:.04em;margin:0 0 12px}
.hero h1{font-size:clamp(28px,5vw,46px);margin:0 0 16px;line-height:1.2}.lead{font-size:18px;color:var(--muted);max-width:760px;margin:0 0 26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-block;padding:12px 24px;border-radius:999px;text-decoration:none;font-weight:600;transition:.2s}
.btn.primary{background:var(--jade);color:#fff;box-shadow:var(--shadow)}.btn.primary:hover{background:#185a4a}.btn.ghost{border:1px solid var(--jade);color:var(--jade)}.btn.ghost:hover{background:var(--jade-soft)}
.section{padding:56px 0}.section h2{font-size:clamp(22px,3vw,30px);margin:0 0 8px}.section-sub{color:var(--muted);margin:0 0 24px}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}
.compare-table{border-collapse:collapse;width:100%;min-width:920px;font-size:14.5px}
.compare-table th,.compare-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.compare-table thead th{background:var(--jade);color:#fff;font-weight:600;position:sticky;top:0}
.compare-table tbody tr:hover{background:var(--jade-soft)}.brand-cell{white-space:nowrap}
.story{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.story-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:28px}
.story-text p{margin:0 0 14px}.story-title{font-size:19px;line-height:1.45;color:var(--jade);margin:0 0 18px}.story-text p:last-child{margin-bottom:0}
.story-points{margin:18px 0 0;padding:0;list-style:none}.story-points li{padding-left:22px;position:relative;margin-bottom:10px;color:var(--muted)}.story-points li::before{content:"◆";position:absolute;left:0;color:var(--jade)}
.story-card{background:var(--jade-soft);border-radius:var(--radius);padding:22px;align-self:start}.story-card h3{margin:0 0 10px;font-size:18px;color:var(--jade)}.story-card p{margin:0;color:var(--ink)}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}.guide-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.guide-card h3{margin:0 0 8px;color:var(--jade)}.guide-card p{margin:0;color:var(--muted);font-size:14.5px}
.faq{background:var(--card);border-top:1px solid var(--line)}.faq-list{display:grid;gap:12px}.faq-list details{border:1px solid var(--line);border-radius:12px;padding:4px 18px;background:#fff}.faq-list summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";float:right;color:var(--jade);font-size:20px}.faq-list details[open] summary::after{content:"−"}.faq-list p{margin:0 0 16px;color:var(--muted)}
.site-footer{padding:40px 0;background:var(--ink);color:#cfd8d4}.foot-brand{font-weight:700;color:#fff;margin:0 0 8px}.foot-note{font-size:13px;color:#9fb0aa;margin:0;max-width:820px}
@media(max-width:760px){.nav{display:none}.story-grid{grid-template-columns:1fr}}