:root{--brown:#76503c;--brown2:#5f3f31;--green:#285f58;--cream:#f6f1e8;--paper:#fffdfa;--ink:#24211f;--muted:#6f645c;--line:#d8caba}
*{box-sizing:border-box}body{margin:0;background:#e9e1d6;color:var(--ink);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.62}
.page{max-width:920px;margin:auto;background:var(--cream);min-height:100vh;box-shadow:0 0 32px #3b251a1a}.teacher{padding:28px 30px;background:linear-gradient(135deg,#faf6ef,#eadfce);border-top:9px solid var(--brown);border-bottom:1px solid var(--line)}
.teacher-in{max-width:790px;margin:auto;display:flex;align-items:center;gap:28px}.teacher img{width:132px;height:132px;object-fit:contain;background:#fff;padding:7px;border-radius:8px}.teacher .tag{display:inline-block;background:var(--green);color:#fff;border-radius:16px;padding:3px 12px;font-size:12px;font-weight:bold}.teacher strong{display:block;color:var(--brown);font-size:23px;margin:10px 0 3px}.teacher p{margin:0;color:#615850}
header{background:var(--brown);color:#fff;padding:28px 30px}header>div,main{max-width:860px;margin:auto}h1{font-size:27px;margin:0 0 5px}header p{margin:0;opacity:.9}
main{padding:29px 30px 58px}.full,.material,.directory{background:var(--paper);border-radius:10px;box-shadow:0 3px 13px #4d30200f}.full{padding:20px;border-left:6px solid var(--green)}audio{width:100%;margin-top:12px}h2{color:var(--brown);font-size:20px;margin:31px 0 16px}.material{margin:19px 0;padding:18px 20px;border-left:4px solid var(--green)}.mhead{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:12px}.range{font-weight:bold;color:var(--brown)}
.play{border:0;border-radius:21px;background:var(--green);color:#fff;padding:9px 18px;font-weight:bold;cursor:pointer;white-space:nowrap}.play.playing{background:var(--brown)}
.questions{border-top:1px solid #eee4d8;padding-top:12px}.q{margin:8px 0 18px}.stem{font-weight:600;margin-bottom:7px}.opts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:22px;align-items:start}.opt{min-width:0}.hint{font-size:13px;color:var(--muted);margin:12px 2px 0}
.directory{padding:6px 18px}.directory a{display:grid;grid-template-columns:62px 74px 1fr;gap:8px;padding:12px 4px;color:var(--brown);text-decoration:none;border-bottom:1px solid #eee3d6}.directory a:last-child{border:0}.directory a.current{color:#fff;background:var(--green);margin:0 -8px;padding-left:12px;padding-right:12px}.directory .year{font-weight:bold}.directory .setno{font-variant-numeric:tabular-nums}
footer{text-align:center;color:#796f67;font-size:12px;padding:0 18px 34px}
@media(max-width:600px){.teacher{padding:18px 14px}.teacher-in{gap:14px}.teacher img{width:104px;height:104px}.teacher strong{font-size:18px}.teacher p{font-size:13px}header{padding:24px 18px}h1{font-size:22px}main{padding:23px 14px 48px}.material{padding:15px 13px}.mhead{align-items:flex-start}.play{padding:8px 13px}.opts{grid-template-columns:1fr;row-gap:3px}.directory a{grid-template-columns:58px 65px 1fr}}