*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:#18202f;line-height:1.6;background:#fff}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}header{display:flex;justify-content:space-between;align-items:center;padding:18px 0}
.logo{font-weight:800;font-size:18px}.logo b{color:#1d4ed8}nav a{margin-left:16px;color:#4b5567;text-decoration:none;font-size:14px}
.hero{padding:56px 0 40px;text-align:center}.hero h1{font-size:40px;line-height:1.2;margin:0 0 14px}.hero p{font-size:18px;color:#4b5567;max-width:720px;margin:0 auto 26px}
form.check{display:flex;gap:8px;max-width:620px;margin:0 auto}form.check input{flex:1;padding:14px 16px;font-size:16px;border:2px solid #d6dce8;border-radius:10px}
.btn{background:#1d4ed8;color:#fff;border:0;padding:14px 22px;font-size:16px;font-weight:700;border-radius:10px;cursor:pointer;text-decoration:none;display:inline-block}
.btn.alt{background:#fff;color:#1d4ed8;border:2px solid #1d4ed8}.small{font-size:13px;color:#6b7385}
#result{max-width:620px;margin:18px auto 0;text-align:left;display:none}.card{border:1px solid #e3e8f0;border-radius:12px;padding:20px;background:#f8fafd}
section{padding:44px 0;border-top:1px solid #eef1f6}h2{font-size:26px;margin:0 0 18px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.grid .card h3{margin:0 0 6px;font-size:16px}
.price{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;max-width:760px;margin:0 auto}
.price .card.hl{border:2px solid #1d4ed8;background:#fff}.amount{font-size:40px;font-weight:800}.amount small{font-size:16px;color:#6b7385;font-weight:500}
ul.ticks{padding-left:0;list-style:none}ul.ticks li:before{content:"✓ ";color:#2e7d32;font-weight:700}
details{border-bottom:1px solid #eef1f6;padding:12px 0}summary{font-weight:600;cursor:pointer}
footer{padding:30px 0;color:#6b7385;font-size:13px;border-top:1px solid #eef1f6}
body.lang-zh .en{display:none}body.lang-en .zh{display:none}
@media(max-width:600px){.hero h1{font-size:28px}form.check{flex-direction:column}}