:root{--bg:#f4f8fa;--surface:#fff;--surface-soft:#eef6f7;--ink:#17323a;--muted:#667d83;--line:#d9e6e8;--primary:#197a82;--primary-dark:#125f66;--accent:#dff1f2;--ok:#2f7d65;--danger:#a63c3c;--shadow:0 18px 50px rgba(29,72,79,.10);--radius:22px;--sans:"Noto Sans TC","Segoe UI",system-ui,-apple-system,sans-serif}
*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:var(--sans);color:var(--ink);background:radial-gradient(circle at 15% 18%,rgba(63,149,157,.09),transparent 28%),linear-gradient(180deg,#f8fbfc 0%,var(--bg) 100%)}
.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 42px;border-bottom:1px solid rgba(217,230,232,.9);background:rgba(255,255,255,.88);backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.02em}.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--primary);display:grid;place-items:center;color:#fff;font-size:20px;box-shadow:0 6px 16px rgba(25,122,130,.2)}.brand-sub{font-size:12px;color:var(--muted);font-weight:600;margin-top:2px}.help{font-size:13px;color:var(--muted)}
.shell{min-height:calc(100vh - 72px);display:grid;grid-template-columns:minmax(0,1.1fr) minmax(380px,.9fr);gap:48px;align-items:center;max-width:1180px;margin:0 auto;padding:64px 40px 80px}.hero{padding:20px 12px 20px 0}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--primary-dark);background:var(--accent);border:1px solid #cce5e7;border-radius:999px;padding:7px 12px}.hero h1{font-size:46px;line-height:1.18;margin:22px 0 18px;letter-spacing:-.03em;max-width:620px}.hero p{font-size:18px;line-height:1.9;color:var(--muted);max-width:650px;margin:0 0 30px}
.features{display:grid;gap:14px;margin-top:30px;max-width:620px}.feature{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid var(--line)}.feature:first-child{border-top:0}.icon{width:38px;height:38px;flex:0 0 38px;border-radius:12px;background:var(--surface-soft);display:grid;place-items:center;color:var(--primary);font-weight:900}.feature b{display:block;margin-bottom:3px}.feature span{font-size:14px;color:var(--muted);line-height:1.6}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}.card h2{font-size:26px;margin:0 0 10px}.card .lead{color:var(--muted);font-size:15px;line-height:1.75;margin:0 0 24px}.secure{display:flex;align-items:center;gap:10px;padding:12px 14px;background:#f7fbfa;border:1px solid #d9ece7;border-radius:14px;color:#4b7168;font-size:13px;margin-bottom:18px}
.btn{width:100%;border:0;border-radius:14px;background:var(--primary);color:#fff;padding:14px 18px;font-size:16px;font-weight:800;cursor:pointer;box-shadow:0 8px 20px rgba(25,122,130,.18);transition:.18s ease}.btn:hover{background:var(--primary-dark);transform:translateY(-1px)}
.smallprint{font-size:12.5px;color:var(--muted);line-height:1.7;margin:16px 2px 0;text-align:center}.tech-toggle{border:0;background:none;color:#748a8f;font-size:12px;cursor:pointer;display:block;margin:18px auto 0;text-decoration:underline;text-underline-offset:3px}.tech{display:none;margin-top:14px;padding:13px 14px;border-radius:12px;background:#f6f8f9;border:1px solid var(--line);color:#61777c;font-size:12px;line-height:1.7;word-break:break-all}.tech.show{display:block}.err{margin-top:14px;background:#fff3f3;border:1px solid #efcaca;color:var(--danger);padding:11px 12px;border-radius:12px;font-size:13px;line-height:1.6;display:none}
@media(max-width:900px){.topbar{padding:0 20px}.shell{grid-template-columns:1fr;padding:38px 22px 54px;gap:26px}.hero{padding:0}.hero h1{font-size:36px}.hero p{font-size:16px}.card{padding:26px}}