*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:#f0f2f5;color:#1a1a2e;line-height:1.7}
.hero{background:linear-gradient(135deg,#1a2a4a 0%,#2d5aa0 100%);color:#fff;text-align:center;padding:56px 20px 48px}
.hero h1{font-size:32px;font-weight:700;letter-spacing:1px}
.hero .sub{font-size:15px;opacity:.88;margin-top:10px;max-width:720px;margin-left:auto;margin-right:auto}
.hero .badges{margin-top:16px}
.hero .badge{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.35);border-radius:20px;padding:4px 14px;font-size:12px;margin:4px}
.container{max-width:960px;margin:0 auto;padding:32px 20px 50px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-top:8px}
.card{background:#fff;border-radius:14px;padding:20px 22px;box-shadow:0 2px 12px rgba(0,0,0,.08);border:1px solid #e8ecf2}
.card h3{font-size:16px;color:#1a2a4a;margin-bottom:8px}
.card p{font-size:13.5px;color:#5a6478}
.cta{text-align:center;margin-top:28px}
.btn{display:inline-block;padding:12px 34px;border-radius:10px;font-size:15px;font-weight:700;text-decoration:none;transition:background .2s;color:#fff}
.btn-primary{background:#2d5aa0}
.btn-primary:hover{background:#1a2a4a}
.btn-green{background:#43a047}
.btn-green:hover{background:#2e7d32}
.note{background:#fff;border-left:4px solid #2d5aa0;border-radius:0 8px 8px 0;padding:12px 18px;margin-top:26px;font-size:13px;color:#5a6478}
.note b{color:#1a2a4a}
.ai-score{background:linear-gradient(135deg,#0f2027 0%,#203a43 50%,#2c5364 100%);color:#fff;border-radius:16px;padding:28px 24px;margin-top:28px;text-align:center}
.ai-score h2{font-size:20px;letter-spacing:1px}
.ai-score .sub{font-size:13px;opacity:.85;margin-top:6px}
.score-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}
.score-item{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:12px;padding:16px 10px}
.score-item .icon{font-size:22px;margin-bottom:4px}
.score-item .num{font-size:26px;font-weight:800;color:#7ee787}
.score-item .label{font-size:12px;opacity:.92;margin-top:4px}
.score-item .desc{font-size:11px;opacity:.68;margin-top:4px;line-height:1.5}
.score-demo{margin-top:22px;text-align:left;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:16px 18px}
.score-demo .demo-title{font-size:13px;opacity:.9;margin-bottom:10px;text-align:center}
.score-demo .demo-row{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:12.5px;padding:8px 10px;border-radius:8px;flex-wrap:wrap}
.score-demo .demo-before{background:rgba(255,107,107,.12)}
.score-demo .demo-after{background:rgba(46,204,113,.14);margin-top:6px}
.score-demo .demo-tag{font-weight:700;white-space:nowrap}
.score-demo .demo-note{font-size:11.5px;opacity:.7;margin-top:10px;border-top:1px dashed rgba(255,255,255,.2);padding-top:8px}
.footer{text-align:center;color:#9aa;font-size:12px;padding:20px 0 30px}
.footer a{color:#2d5aa0;text-decoration:none}
@media(max-width:640px){.hero h1{font-size:24px}.container{padding:20px 14px 40px}.score-grid{grid-template-columns:repeat(2,1fr)}}