*{box-sizing:border-box}
body{margin:0;background:#fff8ec;color:#3a2e22;font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;font-size:20px;line-height:1.9;-webkit-text-size-adjust:100%}
a{color:#b5522b}
.wrap{max-width:760px;margin:0 auto;padding:16px 18px 40px}
header.top{background:#ffb94f;color:#4a2a00;padding:18px;text-align:center;border-radius:0 0 22px 22px;box-shadow:0 3px 0 #f0a030}
header.top h1{margin:0;font-size:28px;letter-spacing:2px}
header.top p{margin:4px 0 0;font-size:16px}
.nav{font-size:17px;margin:14px 0}
.nav a{text-decoration:none;background:#fff;border:2px solid #f3c98b;border-radius:20px;padding:4px 14px;display:inline-block;margin:2px 4px 2px 0}
.grades{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.grades a{display:block;text-align:center;text-decoration:none;font-size:28px;font-weight:bold;padding:26px 0;border-radius:20px;color:#fff;box-shadow:0 5px 0 rgba(0,0,0,.15)}
.grades a:active{transform:translateY(3px);box-shadow:0 2px 0 rgba(0,0,0,.15)}
.g2{background:#f47c6a}.g3{background:#f6a53c}.g4{background:#5bb57a}.g5{background:#4d9de0}.g6{background:#9a6fd0}
.dates{list-style:none;padding:0;margin:0}
.dates li a{display:block;background:#fff;border:2px solid #f3d6aa;border-radius:16px;padding:14px 18px;margin:12px 0;text-decoration:none;color:#3a2e22}
.dates li a b{font-size:22px}
.dates li a span{display:block;font-size:16px;color:#8a7560}
.today{border-color:#f6a53c!important;background:#fff3dc!important}
.tag{background:#f6a53c;color:#fff;border-radius:10px;padding:0 8px;font-size:15px;margin-left:6px}
article{background:#fff;border-radius:20px;padding:20px 20px 10px;margin:22px 0;box-shadow:0 2px 10px rgba(160,110,40,.12)}
article h2{margin:0 0 10px;font-size:25px;line-height:1.5;color:#a3461f}
article h2 small{display:inline-block;background:#ffe2b8;color:#8a4a10;border-radius:10px;padding:0 10px;font-size:16px;margin-right:8px;vertical-align:middle}
article p{margin:0 0 14px;text-indent:2em}
article ul{margin:0 0 14px;padding-left:1.6em}
code{background:#f6eee2;border-radius:6px;padding:0 4px;font-size:.85em;word-break:break-all}
.hw{background:#eef8ee;border:2px dashed #7cc28f;border-radius:16px;padding:14px 16px;margin:18px 0 12px}
.hw h3{margin:0 0 6px;font-size:21px;color:#2f7a45}
.hw .tip{font-size:16px;color:#4d6b55;margin:0 0 8px}
.hw ol{margin:0;padding-left:1.6em}
.hw li{margin:6px 0}
.answer-head{background:#fff4dc;border:2px solid #f3c98b;border-radius:16px;padding:14px 16px;margin:18px 0}
.answer-head label,.answer-box label{display:block;font-weight:bold;margin:6px 0}
.answer-head select,.answer-box textarea{width:100%;font:inherit;color:#3a2e22;background:#fff;border:2px solid #d9c29e;border-radius:12px;padding:9px 11px}
.answer-head select{min-height:48px}
.answer-box{border-top:1px solid #b9dbbf;margin-top:12px;padding-top:8px}
.answer-box textarea{display:block;min-height:100px;resize:vertical;line-height:1.6}
.answer-submit{display:block;width:100%;border:0;border-radius:14px;background:#e8753d;color:#fff;font:inherit;font-weight:bold;padding:13px 18px;margin:18px 0;cursor:pointer;box-shadow:0 4px 0 #bd5527}
.answer-submit:active{transform:translateY(2px);box-shadow:0 2px 0 #bd5527}
.answer-note{font-size:16px;color:#76634f;margin:6px 0 0}
footer{text-align:center;font-size:14px;color:#a8957f;margin-top:30px}
@media (max-width:420px){body{font-size:19px}.grades a{font-size:24px;padding:22px 0}}