:root{--teacher-navy:#071f49;--teacher-blue:#0d4ca3;--teacher-gold:#d99a20;--teacher-ink:#10254a;--teacher-muted:#62718c;--teacher-line:#d9e3f0;--teacher-bg:#f3f7fc}
*{box-sizing:border-box}.teacher-body{margin:0;background:var(--teacher-bg);color:var(--teacher-ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif}.teacher-header{height:76px;padding:0 clamp(24px,6vw,96px);display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--teacher-line)}.teacher-brand{text-decoration:none;color:var(--teacher-navy);display:flex;flex-direction:column}.teacher-brand span{font-size:11px;letter-spacing:.18em;color:var(--teacher-gold);font-weight:800}.teacher-brand strong{font-size:20px}.teacher-header nav{display:flex;gap:24px}.teacher-header nav a{color:#435574;text-decoration:none;font-weight:650;font-size:14px}.teacher-shell{width:min(1480px,calc(100% - 40px));margin:0 auto;padding:48px 0 72px}.teacher-gate,.teacher-review-panel,.teacher-students-panel{background:#fff;border:1px solid var(--teacher-line);border-radius:24px}.teacher-gate{padding:64px;text-align:center}.teacher-hero{display:flex;justify-content:space-between;align-items:flex-end;padding:12px 4px 32px}.eyebrow{margin:0 0 8px;color:var(--teacher-gold);font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.teacher-hero h1{margin:0;color:var(--teacher-navy);font-size:clamp(34px,5vw,58px);line-height:1.08}.teacher-hero p{margin:12px 0 0;color:var(--teacher-muted);font-size:16px}.teacher-hero-stat{min-width:210px;padding:20px 24px;background:var(--teacher-navy);color:#fff;border-radius:20px;box-shadow:0 18px 42px #071f4926}.teacher-hero-stat span,.teacher-hero-stat small{display:block;color:#aebdda}.teacher-hero-stat strong{display:block;margin:5px 0;font-size:34px}.teacher-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:22px;align-items:start}.teacher-students-panel{padding:22px;position:sticky;top:20px}.teacher-section-heading h2,.teacher-review-head h2{margin:0;color:var(--teacher-navy)}.teacher-add-form{margin-top:20px;padding:16px;background:#f5f8fd;border-radius:16px}.teacher-add-form label span{display:block;margin-bottom:7px;font-size:12px;font-weight:750}.teacher-add-form input{width:100%;height:44px;border:1px solid #c8d6e9;border-radius:11px;padding:0 12px;background:#fff}.teacher-add-form button,.teacher-open-mock{width:100%;margin-top:10px;padding:12px;border:0;border-radius:11px;background:var(--teacher-blue);color:#fff;font-weight:750;cursor:pointer;text-align:center;text-decoration:none;display:block}.teacher-add-form p{min-height:18px;margin:8px 0 0;font-size:12px;color:var(--teacher-muted)}.teacher-student-list{display:grid;gap:9px;margin-top:16px}.teacher-student-card{width:100%;padding:14px;border:1px solid var(--teacher-line);border-radius:14px;background:#fff;text-align:left;cursor:pointer}.teacher-student-card:hover,.teacher-student-card.is-active{border-color:var(--teacher-blue);box-shadow:0 8px 24px #174c9220}.teacher-student-card.is-active{background:#eef5ff}.teacher-student-card strong,.teacher-student-card span,.teacher-student-card small{display:block}.teacher-student-card span,.teacher-student-card small{margin-top:3px;color:var(--teacher-muted);overflow:hidden;text-overflow:ellipsis}.teacher-review-panel{padding:28px;min-height:570px}.teacher-review-empty{min-height:500px;display:grid;place-content:center;text-align:center}.teacher-review-empty span{margin:auto;width:52px;height:52px;display:grid;place-content:center;border-radius:50%;background:#e9f1fc;color:var(--teacher-blue);font-weight:850}.teacher-review-empty h2{margin:16px 0 5px}.teacher-review-empty p{color:var(--teacher-muted)}.teacher-review-head{display:flex;justify-content:space-between;gap:20px}.teacher-review-head p{margin:7px 0;color:var(--teacher-muted)}.teacher-open-mock{width:auto;margin:0;align-self:flex-start;padding:11px 18px}.teacher-session-tabs{display:flex;gap:8px;overflow:auto;padding:20px 0 14px;border-bottom:1px solid var(--teacher-line)}.teacher-session-tabs button{white-space:nowrap;border:1px solid #cbd8ea;background:#f7faff;color:var(--teacher-ink);border-radius:999px;padding:10px 14px;font-weight:700;cursor:pointer}.teacher-session-tabs button[aria-selected="true"]{background:var(--teacher-navy);border-color:var(--teacher-navy);color:#fff}.teacher-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}.teacher-summary div{padding:16px;background:#f5f8fd;border-radius:14px}.teacher-summary span,.teacher-summary strong{display:block}.teacher-summary span{font-size:12px;color:var(--teacher-muted)}.teacher-summary strong{margin-top:5px;font-size:24px;color:var(--teacher-navy)}.teacher-attempt-list{display:grid;gap:12px}.teacher-attempt-card{border:1px solid var(--teacher-line);border-radius:16px;overflow:hidden}.teacher-attempt-card summary{list-style:none;cursor:pointer;padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:15px}.teacher-attempt-card summary::-webkit-details-marker{display:none}.teacher-attempt-card summary div{min-width:0}.teacher-attempt-card summary strong,.teacher-attempt-card summary span{display:block}.teacher-attempt-card summary span{margin-top:4px;color:var(--teacher-muted);font-size:13px}.teacher-attempt-card summary em{font-style:normal;color:var(--teacher-blue);font-weight:750}.teacher-attempt-body{padding:0 18px 18px;border-top:1px solid var(--teacher-line);background:#fbfdff}.teacher-answer-block{margin-top:14px}.teacher-answer-block span{display:block;margin-bottom:6px;color:var(--teacher-muted);font-size:12px;font-weight:750}.teacher-answer-block pre{margin:0;white-space:pre-wrap;word-break:break-word;font:inherit;line-height:1.65;padding:13px;background:#f0f5fb;border-radius:10px}.teacher-audio-list{display:grid;gap:8px;margin-top:14px}.teacher-audio-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:11px;background:#edf4fc;border-radius:10px}.teacher-audio-row button{border:0;background:var(--teacher-blue);color:#fff;border-radius:8px;padding:8px 10px;cursor:pointer}.teacher-audio-row audio{grid-column:1/-1;width:100%}.teacher-empty-list{padding:30px;text-align:center;color:var(--teacher-muted);border:1px dashed #cbd8ea;border-radius:14px}
@media(max-width:850px){.teacher-header{height:auto;padding:16px 20px;align-items:flex-start}.teacher-header nav{gap:12px;flex-wrap:wrap;justify-content:flex-end}.teacher-shell{width:min(100% - 24px,1480px);padding-top:26px}.teacher-hero{align-items:flex-start;gap:20px}.teacher-hero-stat{display:none}.teacher-layout{grid-template-columns:1fr}.teacher-students-panel{position:static}.teacher-review-panel{padding:18px}.teacher-summary{grid-template-columns:1fr}.teacher-review-head{display:block}.teacher-open-mock{margin-top:12px;width:100%}}