*{box-sizing:border-box}
body{margin:0;background:#f5f9fd;color:#253c51;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}
header{background:white;border-bottom:1px solid #e3edf5;padding:20px 6%;display:flex;justify-content:space-between;align-items:center}
.brand{font-size:22px;font-weight:750;color:#407eaf}
.brand small{display:block;font-size:11px;letter-spacing:2px;color:#91a8ba;margin-top:5px}
header a{color:#507a99;text-decoration:none;font-size:14px}
main{max-width:1080px;margin:auto;padding:65px 24px}
.tag{color:#6897bf;font-size:12px;letter-spacing:3px;font-weight:700}
h1{font-size:clamp(32px,5vw,54px);margin:18px 0;color:#254d6b}
.desc{font-size:16px;color:#758b9e;line-height:2}
.hero{margin-bottom:48px}
.subjects{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.subject{background:white;padding:26px 18px;border:1px solid #e3edf5;border-radius:16px}
.subject .number{color:#94b8d4;font-size:12px}
.subject h3{font-size:22px;margin:20px 0 6px}
.subject p{font-size:13px;color:#899dae;margin:0}
section{margin-top:48px}
h2{font-size:25px}
.panel{background:white;border:1px solid #e3edf5;border-radius:18px;padding:28px;margin-top:18px}
.exam{border-bottom:1px solid #edf2f7;padding:18px 0;display:flex;align-items:center;justify-content:space-between;gap:15px}
.exam:last-child{border:0}
.exam strong{display:block;margin-bottom:8px}
.exam small{color:#8195a6}
button{background:#477fa9;color:white;border:0;padding:12px 22px;border-radius:10px;cursor:pointer;font-weight:600}
button:disabled{opacity:.5;cursor:not-allowed}
input{padding:14px;border:1px solid #d6e5ef;border-radius:10px;font-size:15px;width:100%;max-width:420px}
.note{font-size:13px;color:#8295a4;line-height:1.8}
footer{text-align:center;padding:50px 15px;color:#9aabba;font-size:12px}
@media(max-width:700px){.subjects{grid-template-columns:repeat(2,1fr)}main{padding-top:40px}.exam{align-items:flex-start;flex-direction:column}}