/* =========================================================
   admin.css —— 教师后台
   ========================================================= */

body.admin { background: var(--cream-2); }

.admin-layout { display: flex; min-height: 100vh; }

/* ---------------- 侧边栏 ---------------- */
.side {
  width: 246px; flex: none; background: var(--wood-deep); color: #E4D5C4;
  padding: 22px 16px; display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}
.side-logo { display: flex; align-items: center; gap: 11px; padding: 0 6px 22px; }
.side-logo .logo-mark { width: 38px; height: 38px; border-radius: 12px; }
.side-logo b { color: #fff; font-size: 16px; display: block; letter-spacing: -.01em; }
.side-logo span { font-size: 10.5px; letter-spacing: .2em; color: #A88F76; }

.side-nav { display: grid; gap: 3px; }
.side-nav .sn-title { font-size: 11px; letter-spacing: .14em; color: #8C7663; padding: 16px 12px 7px; font-weight: 700; }
.side-item {
  display: flex; align-items: center; gap: 11px; width: 100%;
  padding: 11px 13px; border-radius: 12px; font-size: 14.5px; font-weight: 600;
  color: #C9B49C; transition: background .18s, color .18s; text-align: left;
  background: transparent; border: none; cursor: pointer; font-family: inherit;
}
.side-item i { font-style: normal; font-size: 16px; width: 20px; text-align: center; }
.side-item:hover { background: rgba(255,255,255,.07); color: #fff; }
.side-item.is-on { background: linear-gradient(120deg, var(--coral), #E85F3D); color: #fff; box-shadow: 0 8px 20px rgba(232,95,61,.35); }
.side-item .badge {
  margin-left: auto; background: rgba(255,255,255,.16); color: #fff;
  min-width: 22px; height: 20px; padding: 0 6px; border-radius: 99px;
  font-size: 11.5px; font-weight: 800; display: grid; place-items: center;
}
.side-item.is-on .badge { background: rgba(255,255,255,.28); }
.side-item .badge.warn { background: var(--gold); color: #4A3200; }

.side-foot { margin-top: auto; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.1); }
.side-teacher { display: flex; align-items: center; gap: 11px; padding: 8px 6px; }
.side-teacher .ava {
  width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(140deg,#D9BB99,#8B5E3C); color: #fff; font-weight: 800;
}
.side-teacher b { display: block; font-size: 14px; color: #fff; }
.side-teacher span { font-size: 11.5px; color: #8C7663; }

/* ---------------- 主区 ---------------- */
.main { flex: 1; min-width: 0; padding: 26px 30px 60px; }
.topbar { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; flex-wrap: wrap; }
.topbar h1 { font-size: 25px; color: var(--wood-deep); }
.topbar p { font-size: 13.5px; color: var(--ink-3); margin-top: 3px; }
.topbar-actions { margin-left: auto; display: flex; gap: 10px; flex-wrap: wrap; }

.search {
  display: flex; align-items: center; gap: 9px; background: var(--white);
  border: 1px solid var(--line); border-radius: var(--r-full); padding: 9px 16px;
  box-shadow: var(--shadow-sm); min-width: 220px;
}
.search input { border: none; outline: none; background: none; width: 100%; font-size: 14px; }
.search span { color: var(--ink-4); }

.pane { display: none; }
.pane.is-on { display: block; animation: popIn .28s; }

/* ---------------- KPI ---------------- */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 22px; }
.kpi { padding: 20px 22px; position: relative; overflow: hidden; }
.kpi .kpi-ic {
  width: 40px; height: 40px; border-radius: 13px; display: grid; place-items: center;
  font-size: 18px; margin-bottom: 12px;
}
.kpi b { font-family: var(--font-num); font-size: 32px; color: var(--wood-deep); line-height: 1; display: block; }
.kpi b small { font-size: 14px; color: var(--ink-3); font-family: var(--font); font-weight: 600; }
.kpi span { font-size: 13px; color: var(--ink-2); }
.kpi .kpi-delta { position: absolute; top: 20px; right: 20px; font-size: 12px; font-weight: 700; }

/* ---------------- 通用区块 ---------------- */
.grid-2 { display: grid; grid-template-columns: 1.35fr .65fr; gap: 18px; align-items: start; }
.grid-2b { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.panel { padding: 22px; margin-bottom: 18px; }
.panel-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.panel-head h3 { font-size: 16.5px; color: var(--wood-deep); }
.panel-head .ph-sub { font-size: 12.5px; color: var(--ink-3); }
.panel-head .ph-right { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.pr-min-label { font-size: 12.5px; color: var(--ink-3); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.pt-input {
  width: 64px; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--white); color: var(--ink); font-size: 13px; font-weight: 600; text-align: center;
}
.pt-input:focus { outline: none; border-color: var(--coral); box-shadow: 0 0 0 3px rgba(255,142,111,.18); }

/* ---------------- 表格 ---------------- */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th {
  text-align: left; font-size: 12px; letter-spacing: .05em; color: var(--ink-3);
  font-weight: 700; padding: 0 12px 11px; border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.tbl td { padding: 13px 12px; border-bottom: 1px solid var(--cream-2); font-size: 14px; vertical-align: middle; }
.tbl tbody tr { transition: background .15s; cursor: pointer; }
.tbl tbody tr:hover { background: var(--cream); }
.tbl tbody tr:last-child td { border-bottom: none; }

.stu-cell { display: flex; align-items: center; gap: 11px; }
.ava-sm {
  width: 38px; height: 38px; border-radius: 12px; flex: none; display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 15px;
}
.stu-cell b { display: block; font-size: 14.5px; color: var(--wood-deep); }
.stu-cell span { font-size: 12px; color: var(--ink-3); }

.grade-pill {
  display: inline-grid; place-items: center; min-width: 40px; height: 28px; padding: 0 10px;
  border-radius: 9px; font-weight: 800; font-size: 13px;
  background: var(--cream-2); color: var(--wood-dark);
}
.grade-pill.hi { background: var(--gold-soft); color: #A57A10; }

.score-pill {
  display: inline-grid; place-items: center; width: 34px; height: 26px; border-radius: 8px;
  font-weight: 800; font-size: 12.5px;
}
.sc-A { background: var(--mint-soft); color: #2F7D5F; }
.sc-B { background: var(--sky-soft); color: #2F6B99; }
.sc-C { background: var(--gold-soft); color: #A57A10; }

.cell-progress { min-width: 130px; }
.cell-progress .bar { margin-top: 5px; }
.cell-progress span { font-size: 12px; color: var(--ink-3); }

.row-actions { display: flex; gap: 6px; justify-content: flex-end; }
.icon-btn {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--cream-2); color: var(--ink-2); font-size: 13px; transition: all .15s;
}
.icon-btn:hover { background: var(--wood); color: #fff; }
.icon-btn.danger:hover { background: var(--coral-dark); }

.empty { text-align: center; padding: 46px 20px; color: var(--ink-3); }
.empty .em-ic { font-size: 40px; margin-bottom: 10px; opacity: .5; }

/* ---------------- 日历 ---------------- */
.cal-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.cal-title { font-size: 19px; font-weight: 800; color: var(--wood-deep); font-family: var(--font-num); }
.cal-nav { display: flex; gap: 6px; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 7px; }
.cal-dow { text-align: center; font-size: 12px; color: var(--ink-3); font-weight: 700; padding-bottom: 4px; }
.cal-cell {
  aspect-ratio: 1/.86; border-radius: 13px; background: var(--cream); padding: 8px 9px;
  border: 1.5px solid transparent; text-align: left; position: relative;
  transition: all .16s; display: flex; flex-direction: column; overflow: hidden;
}
.cal-cell:hover { border-color: var(--wood-light); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.cal-cell.is-out { opacity: .32; }
.cal-cell.is-today { background: var(--coral-soft); }
.cal-cell.is-today .cd-num { color: var(--coral-dark); }
.cal-cell.is-sel { border-color: var(--coral); box-shadow: 0 0 0 3px rgba(255,122,89,.16); }
.cd-num { font-family: var(--font-num); font-size: 15px; font-weight: 800; color: var(--wood-dark); }
.cd-dots { display: flex; flex-wrap: wrap; gap: 3px; margin-top: auto; }
.cd-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--wood-light); }
.cd-dot.plan { background: var(--sky); }
.cd-count {
  position: absolute; top: 7px; right: 8px; font-size: 10.5px; font-weight: 800;
  color: #fff; background: var(--wood); border-radius: 99px; padding: 1px 6px;
}
.cal-cell.is-today .cd-count { background: var(--coral-dark); }
.cal-cell.is-prac { background: var(--mint-soft); border-color: #BFE3D2; }
.cal-cell.is-prac .cd-num { color: var(--mint); }
.cal-cell.is-prac .cd-count { background: var(--mint); }

/* ---------------- 练琴评价卡 ---------------- */
.eval-card {
  display: flex; align-items: center; gap: 18px;
  background: linear-gradient(135deg, #FFF3EA, #FBE7D6);
  border: 1px solid #F0DCAA; border-radius: var(--r-lg); padding: 20px 22px; margin-bottom: 6px;
}
.eval-badge {
  width: 74px; height: 74px; border-radius: 20px; display: grid; place-items: center;
  flex: none; font-size: 26px; font-weight: 900; color: #fff; box-shadow: var(--shadow);
}
.eval-main { flex: 1; }
.eval-main .ev-level { font-size: 21px; font-weight: 900; color: var(--wood-deep); }
.eval-main .ev-desc { font-size: 13px; color: var(--ink-2); margin-top: 4px; line-height: 1.55; }
.eval-score { text-align: right; flex: none; }
.eval-score b { font-family: var(--font-num); font-size: 30px; color: var(--wood-deep); line-height: 1; display: block; }
.eval-score b small { font-size: 13px; color: var(--ink-3); font-weight: 700; }
.eval-score span { font-size: 12px; color: var(--ink-3); }

.day-list { display: grid; gap: 10px; }
.day-item {
  display: flex; align-items: center; gap: 12px; padding: 13px 14px;
  background: var(--cream); border-radius: var(--r); border-left: 4px solid var(--wood-light);
}
.day-item.plan { border-left-color: var(--sky); }
.day-time { font-family: var(--font-num); font-weight: 800; font-size: 15px; color: var(--wood-dark); min-width: 46px; }
.day-item .di-main b { display: block; font-size: 14px; color: var(--wood-deep); }
.day-item .di-main span { font-size: 12.5px; color: var(--ink-3); }
.day-hours {
  margin-left: auto; font-size: 12.5px; font-weight: 800; color: var(--wood);
  background: var(--white); padding: 4px 11px; border-radius: 99px; white-space: nowrap;
}

/* ---------------- 热力图 ---------------- */
.heat-wrap { overflow-x: auto; padding-bottom: 6px; }
.heat {
  display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 13px);
  gap: 3px; min-width: max-content;
}
.heat i {
  width: 13px; height: 13px; border-radius: 3.5px; background: var(--cream-2);
  display: block; transition: transform .1s;
}
.heat i:hover { transform: scale(1.4); outline: 1.5px solid var(--wood); }
.heat i.l1 { background: #F3DEC6; }
.heat i.l2 { background: #E0B98C; }
.heat i.l3 { background: #C89B6E; }
.heat i.l4 { background: #A2714A; }
.heat i.l5 { background: #7A4E2C; }
.heat-legend { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-3); margin-top: 12px; }
.heat-legend i { width: 12px; height: 12px; border-radius: 3.5px; display: block; }
.heat-months { display: flex; font-size: 11px; color: var(--ink-3); gap: 0; margin-bottom: 5px; min-width: max-content; }

/* ---------------- 抽屉：学生档案卡 ---------------- */
.drawer-mask {
  position: fixed; inset: 0; background: rgba(62,41,25,.42); z-index: 200;
  opacity: 0; pointer-events: none; transition: opacity .28s; backdrop-filter: blur(2px);
}
.drawer-mask.is-on { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(720px, 96vw);
  background: var(--cream); z-index: 201; box-shadow: -20px 0 60px rgba(62,41,25,.22);
  transform: translateX(100%); transition: transform .34s cubic-bezier(.22,1,.36,1);
  display: flex; flex-direction: column;
}
.drawer.is-on { transform: none; }
.drawer-head {
  padding: 22px 26px; background: var(--white); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 14px;
}
.drawer-body { flex: 1; overflow-y: auto; padding: 22px 26px 40px; }
.drawer-close {
  width: 36px; height: 36px; border-radius: 11px; background: var(--cream-2);
  display: grid; place-items: center; font-size: 16px; color: var(--ink-2); margin-left: auto;
}
.drawer-close:hover { background: var(--coral-soft); color: var(--coral-dark); }

.profile-hero {
  background: linear-gradient(135deg, #FFF3EA, #FBE7D6);
  border-radius: var(--r-lg); padding: 22px; margin-bottom: 18px;
  display: flex; gap: 18px; align-items: center; flex-wrap: wrap;
}
.profile-hero .ava-lg {
  width: 68px; height: 68px; border-radius: 20px; display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 26px; box-shadow: var(--shadow);
}
.profile-hero h2 { font-size: 23px; color: var(--wood-deep); }
.profile-hero .ph-meta { font-size: 13.5px; color: var(--ink-2); margin-top: 4px; }
.profile-hero .ph-tags { display: flex; gap: 6px; margin-top: 9px; flex-wrap: wrap; }

.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 18px; }
.info-item {
  background: var(--white); border-radius: var(--r); padding: 13px 16px; border: 1px solid var(--line);
}
.info-item span { font-size: 12px; color: var(--ink-3); display: block; }
.info-item b { font-size: 14.5px; color: var(--wood-deep); font-weight: 700; }

.prog-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 20px; margin-bottom: 18px; }
.prog-row { margin-bottom: 16px; }
.prog-row:last-child { margin-bottom: 0; }
.prog-label { display: flex; justify-content: space-between; font-size: 13.5px; margin-bottom: 7px; }
.prog-label b { color: var(--wood-deep); }
.prog-label span { color: var(--ink-3); }

.alert-box {
  display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: var(--r);
  background: var(--gold-soft); border: 1px solid #F0DCAA; margin-bottom: 18px;
}
.alert-box.danger { background: var(--coral-soft); border-color: #FFC0AD; }
.alert-box .ab-ic { font-size: 18px; }
.alert-box b { display: block; font-size: 14px; color: var(--wood-deep); }
.alert-box p { font-size: 13px; color: var(--ink-2); margin-top: 2px; }

.timeline { position: relative; padding-left: 22px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; margin-bottom: 14px; }
.tl-item::before {
  content: ""; position: absolute; left: -20px; top: 16px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--wood-light); border: 2px solid var(--cream);
}
.tl-item.plan::before { background: var(--sky); }
.tl-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; }
.tl-top { display: flex; align-items: center; gap: 10px; margin-bottom: 7px; flex-wrap: wrap; }
.tl-date { font-family: var(--font-num); font-weight: 800; color: var(--wood-dark); font-size: 14px; }
.tl-course { font-size: 14px; color: var(--wood-deep); font-weight: 700; }
.tl-hw { font-size: 13px; color: var(--ink-2); background: var(--cream); border-radius: 9px; padding: 8px 11px; margin-top: 8px; }
.tl-hw b { color: var(--wood); }
.tl-remark { font-size: 12.5px; color: var(--ink-3); margin-top: 7px; }

/* ---------------- 弹窗表单 ---------------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(62,41,25,.42); z-index: 220;
  display: none; align-items: center; justify-content: center; padding: 20px;
  backdrop-filter: blur(2px);
}
.modal-mask.is-on { display: flex; }
.modal {
  background: var(--white); border-radius: var(--r-xl); width: min(600px, 100%);
  max-height: 88vh; overflow-y: auto; box-shadow: var(--shadow-lg); animation: popIn .24s;
}
.modal-head { padding: 22px 26px 0; display: flex; align-items: center; }
.modal-head h3 { font-size: 19px; color: var(--wood-deep); }
.modal-body { padding: 20px 26px; }
.modal-foot { padding: 0 26px 24px; display: flex; gap: 10px; justify-content: flex-end; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: grid; gap: 6px; }
.field .hint { font-size: 11.5px; color: var(--ink-3); line-height: 1.4; margin-top: -2px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; color: var(--ink-2); font-weight: 700; }
.field input, .field select, .field textarea {
  border: 1.5px solid var(--line); border-radius: 11px; padding: 10px 13px;
  background: var(--cream); outline: none; font-size: 14px; transition: border-color .18s, background .18s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--wood-light); background: var(--white); }
.field textarea { resize: vertical; min-height: 74px; font-family: inherit; }

.seg { display: flex; gap: 6px; background: var(--cream-2); padding: 4px; border-radius: var(--r-full); }
.seg button {
  flex: 1; padding: 7px 12px; border-radius: var(--r-full); font-size: 13px; font-weight: 700; color: var(--ink-2);
}
.seg button.is-on { background: var(--white); color: var(--wood); box-shadow: var(--shadow-sm); }

/* ---------------- 榜单/小列表 ---------------- */
.rank-list { display: grid; gap: 9px; }
.rank-item { display: flex; align-items: center; gap: 11px; padding: 10px 12px; border-radius: var(--r); background: var(--cream); }
.rank-no {
  width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center;
  font-family: var(--font-num); font-weight: 800; font-size: 12.5px;
  background: var(--cream-3); color: var(--wood-dark); flex: none;
}
.rank-item:nth-child(1) .rank-no { background: var(--gold); color: #fff; }
.rank-item:nth-child(2) .rank-no { background: #C9C9C9; color: #fff; }
.rank-item:nth-child(3) .rank-no { background: #D9A15B; color: #fff; }
.rank-item b { font-size: 14px; color: var(--wood-deep); }
.rank-item .rk-val { margin-left: auto; font-family: var(--font-num); font-weight: 800; color: var(--wood); }

.mini-alert {
  display: flex; align-items: center; gap: 10px; padding: 11px 13px;
  border-radius: var(--r); background: var(--coral-soft); margin-bottom: 8px;
}
.mini-alert.warn { background: var(--gold-soft); }
.mini-alert b { font-size: 13.5px; color: var(--wood-deep); }
.mini-alert span { font-size: 12px; color: var(--ink-2); }
.mini-alert .ma-right { margin-left: auto; font-size: 12.5px; font-weight: 800; color: var(--coral-dark); }
.mini-alert.warn .ma-right { color: #A57A10; }

/* ---------------- 作业/回课 ---------------- */
.hw-item {
  display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: start;
  padding: 15px 16px; background: var(--cream); border-radius: var(--r); margin-bottom: 10px;
}
.hw-item .hw-date { font-family: var(--font-num); font-weight: 800; color: var(--wood-dark); font-size: 13.5px; }
.hw-item .hw-body b { display: block; font-size: 14px; color: var(--wood-deep); margin-bottom: 3px; }
.hw-item .hw-body p { font-size: 13px; color: var(--ink-2); }
.hw-item .hw-body .hw-note { font-size: 12.5px; color: var(--ink-3); margin-top: 5px; }

.toolbar-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.chip-filter {
  padding: 7px 15px; border-radius: var(--r-full); font-size: 13px; font-weight: 700;
  background: var(--white); border: 1px solid var(--line); color: var(--ink-2);
}
.chip-filter.is-on { background: var(--wood); border-color: var(--wood); color: #fff; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1180px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-2b { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .side { position: fixed; left: 0; top: 0; z-index: 150; transform: translateX(-100%); transition: transform .3s; }
  .side.is-open { transform: none; }
  .main { padding: 18px 16px 50px; }
  .topbar { gap: 12px; }
  .topbar-actions { flex: 1 1 100%; }
  .search { flex: 1; min-width: 0; }
  .topbar-actions .btn { flex: 1; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .tbl thead { display: none; }
  .tbl td { display: block; border: none; padding: 5px 0; }
  .tbl tbody tr { display: block; padding: 14px; border-bottom: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .main { padding: 14px 12px 40px; }
  .panel { padding: 16px; }
  .topbar h1 { font-size: 21px; }
  .topbar-actions { flex-direction: column; align-items: stretch; }
  .search { width: 100%; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .grid-2b { grid-template-columns: 1fr; }
  .cal-head { flex-wrap: wrap; }
}
.side-toggle { display: none; }
@media (max-width: 860px) { .side-toggle { display: grid; } }

/* 移动端侧栏遮罩 */
.side-mask {
  position: fixed; inset: 0; background: rgba(62, 41, 25, .42);
  z-index: 140; opacity: 0; pointer-events: none; transition: opacity .3s; backdrop-filter: blur(2px);
}
.side-mask.is-on { opacity: 1; pointer-events: auto; }
@media (min-width: 861px) { .side-mask { display: none; } }

/* ---------------- Toast ---------------- */
.toast-wrap { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 300; display: grid; gap: 10px; }
.toast {
  background: var(--wood-deep); color: #fff; padding: 12px 22px; border-radius: var(--r-full);
  font-size: 14px; font-weight: 600; box-shadow: var(--shadow-lg); animation: popIn .25s;
}

/* ---------------- 参数设置 ---------------- */
.param-eq {
  display: inline-block; margin-top: 10px; padding: 7px 14px; border-radius: var(--r-full);
  background: var(--mint-soft); color: var(--wood-deep); font-weight: 600; font-size: 13.5px;
}
.param-summary {
  display: flex; gap: 14px 30px; flex-wrap: wrap; margin-top: 20px; padding: 16px 20px;
  border-radius: var(--r-lg); background: var(--cream); border: 1px solid var(--line);
}
.param-summary > div { display: flex; flex-direction: column; gap: 4px; }
.param-summary span { font-size: 12.5px; color: var(--ink-3); }
.param-summary b { font-size: 15px; color: var(--wood-deep); }

/* ---------------- 站点设置 ---------------- */
.qr-row { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.qr-box {
  width: 124px; height: 124px; flex: none; border-radius: 14px;
  border: 2px dashed var(--line); background: var(--cream);
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: var(--ink-3); font-size: 12px; line-height: 1.7; overflow: hidden; padding: 8px;
}
.qr-box img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.qr-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.set-actions { display: flex; gap: 12px; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }

/* ---------------- 学员成果展示 ---------------- */
.ach-video-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.ach-video-item {
  display: grid; grid-template-columns: 110px 1fr; gap: 14px;
  padding: 16px; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--cream);
}
.ach-thumb {
  width: 110px; height: 146px; border-radius: 12px; overflow: hidden; flex: none;
  background: var(--cream-2); display: grid; place-items: center; color: var(--ink-3);
  font-size: 12px; text-align: center; position: relative;
}
.ach-thumb img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.ach-thumb .ach-upload { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.ach-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-content: start; }
.ach-fields .field { margin: 0; }
.ach-fields .field.full { grid-column: 1 / -1; }
.ach-fields input, .ach-fields select { width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--white); color: var(--ink); font-size: 13px; }
.ach-fields input:focus { outline: none; border-color: var(--coral); box-shadow: 0 0 0 3px rgba(255,142,111,.18); }
.ach-fields label { font-size: 11.5px; color: var(--ink-3); margin-bottom: 4px; display: block; }
.ach-actions { grid-column: 1 / -1; display: flex; gap: 8px; justify-content: flex-end; margin-top: 4px; }
.ach-actions button { font-size: 12px; padding: 5px 10px; border-radius: 7px; border: 1px solid var(--line); background: var(--white); color: var(--ink-2); cursor: pointer; }
.ach-actions button:hover { background: var(--coral-soft); color: var(--coral-dark); border-color: var(--coral-soft); }
.ach-actions .ach-danger { color: var(--coral-dark); }
@media (max-width: 860px) {
  .ach-video-list { grid-template-columns: 1fr; }
  .ach-video-item { grid-template-columns: 1fr; }
  .ach-thumb { width: 100%; height: 180px; }
  .ach-fields { grid-template-columns: 1fr; }
}