/* 学情台：结构独立，颜色跟全站 theme.js */
:root {
  --bg: #171a22;
  --bg-2: #1f2430;
  --paper: #1a1f2a;
  --ink: #e8ecf4;
  --mute: #8a97ad;
  --line: rgba(255,255,255,0.08);
  --ok: #5dd39e;
  --bad: #e55c5c;
  --pend: #c9a227;
  /* 待批/提醒橙红（原散落的 rgba(239,123,99,…)） */
  --warn: #ef7b63;
  --warn-ink: #ffc4b8;
  --warn-soft: rgba(239,123,99,0.16);
  --warn-line: rgba(239,123,99,0.4);
  --warn-glow: rgba(239,123,99,0.45);
  /* 状态衍生色（图例、徽标用，与 --ok/--bad/--pend 同源） */
  --ok-soft: rgba(93,211,158,0.15);
  --ok-ink: #7ee2b4;
  --pend-ink: #e6b25c;
  --pend-line: rgba(230,178,92,0.4);
  /* 深一层的面板底（原 #1c222e / #141922 / #151922 / #0f1218 散落值） */
  --sunken: #1c222e;
  --sunken-2: #141922;
  /* 设计 token */
  --r-lg: 22px;
  --r-md: 14px;
  --r-sm: 10px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --t-fast: .15s var(--ease);
  --t-mid: .3s var(--ease);
  --shadow-lift: 0 16px 32px rgba(0,0,0,0.28);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body.sc-page {
  font-family: "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  flex-direction: column;
}
.hidden { display: none !important; }
[hidden] { display: none !important; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; min-height: 60px; padding: 10px 22px;
  background: #1f2430;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; }
.bc-home {
  width: 36px; height: 36px; border-radius: 12px;
  display: grid; place-items: center;
  text-decoration: none; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line);
}
.bc-home:hover { border-color: var(--accent); color: var(--accent-2); }
.brand-kicker { font-size: 10px; letter-spacing: 0.22em; color: var(--mute); }
.brand-title { font-size: 20px; font-weight: 800; letter-spacing: 0.08em; }
.top-actions { display: flex; gap: 8px; }

.tb-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink);
  font-size: 12px; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.tb-btn:hover { background: #323a4c; }
.tb-btn.primary {
  background: rgba(var(--accent-rgb, 91,140,255), 0.2);
  border-color: rgba(var(--accent-rgb, 91,140,255), 0.4);
  color: var(--accent-2, #c5d6ff);
  font-weight: 700;
}
.tb-btn.primary:hover { background: rgba(var(--accent-rgb, 91,140,255), 0.32); }
.tb-btn.ghost { background: transparent; }
.tb-btn.danger { color: #ff8a8a; border-color: rgba(255,138,138,0.25); }

.main { flex: 1; min-height: 0; overflow: auto; padding: 18px 20px 40px; }
body.is-grading .topbar { display: none; }
body.is-grading .main { padding: 0; overflow: hidden; }

.sc-page, .sc-page * {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.18) transparent;
}
.sc-page ::-webkit-scrollbar { width: 8px; height: 8px; }
.sc-page ::-webkit-scrollbar-track { background: transparent; }
.sc-page ::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.16);
  border-radius: 8px;
}
.sc-page ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.28); }
.view { width: 100%; max-width: 1320px; margin: 0 auto; }

/* ── 花名册：左票夹 + 右肖像墙 ── */
.studio {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
.studio-rail {
  position: sticky; top: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 16px 14px;
  min-height: 420px;
}
.studio-rail.is-flash { box-shadow: 0 0 0 2px var(--warn-glow); }
.rail-kicker { font-size: 10px; letter-spacing: 0.18em; color: var(--bad); font-weight: 700; }
.studio-rail h2 { margin: 2px 0 0; font-size: 26px; }
.rail-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.aside-hint { margin: 0 0 12px; font-size: 12px; color: var(--mute); line-height: 1.5; }
.aside-badge {
  min-width: 24px; height: 24px; padding: 0 7px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bad); color: #fff; font-size: 12px; font-weight: 800;
}
.inbox-list { display: flex; flex-direction: column; gap: 8px; max-height: 62vh; overflow: auto; }
.inbox-item {
  display: block; width: 100%; text-align: left;
  padding: 12px 12px 12px 14px; border: none; cursor: pointer;
  border-radius: 14px;
  background: var(--warn-soft);
  border: 1px solid var(--warn-line);
  color: var(--warn-ink);
}
.inbox-item .ii-name { font-size: 15px; font-weight: 800; }
.inbox-item .ii-meta { font-size: 11px; opacity: 0.88; margin-top: 4px; line-height: 1.35; }
.inbox-empty { padding: 20px 8px !important; }

.studio-board { min-width: 0; }
.board-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-end; margin-bottom: 16px; flex-wrap: wrap; }
.list-title { margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -0.03em; }
.list-desc { margin: 4px 0 0; color: var(--mute); font-size: 13px; }
.board-tools { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.search-input {
  width: 180px; padding: 8px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink); font-size: 13px;
}
.search-input.slim { width: 140px; }
.search-input:focus { outline: none; border-color: var(--accent); }
.filter-chips { display: flex; gap: 6px; }
.filter-chip {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--mute); font-size: 12px; cursor: pointer;
}
.filter-chip.active {
  background: rgba(var(--accent-rgb, 91,140,255), 0.18);
  border-color: rgba(var(--accent-rgb, 91,140,255), 0.45);
  color: var(--accent-2, #c5d6ff);
  font-weight: 700;
}
.muted { font-size: 12px; color: var(--mute); }
.muted.tight { display: inline-flex; align-items: center; gap: 6px; }

.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}
.student-card {
  position: relative;
  display: flex; flex-direction: column;
  border-radius: 22px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  cursor: pointer;
  text-align: left;
  padding: 0 0 12px;
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.student-card:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb, 91,140,255), 0.45);
  box-shadow: var(--shadow-lift);
}
.student-card.has-pending { border-color: var(--warn-line); }
.student-card .avatar-lg {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--sunken-2);
  display: grid; place-items: center;
  font-size: 42px; font-weight: 800; color: var(--accent);
}
.student-card .avatar-lg img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}
.student-card .sc-pad { padding: 10px 14px 2px; }
.student-card .sc-name { font-size: 18px; font-weight: 800; line-height: 1.25; }
.student-card .sc-meta { font-size: 12px; color: var(--mute); margin-top: 3px; }
.student-card .sc-badge {
  position: absolute; top: 10px; right: 10px;
  min-width: 22px; height: 22px; padding: 0 6px; border-radius: 999px;
  background: var(--bad); color: #fff; font-size: 11px; font-weight: 800;
  display: inline-flex; align-items: center; justify-content: center;
  z-index: 1;
}
.student-card.is-archived { opacity: 0.55; filter: grayscale(.25); }

.empty-text { padding: 36px 12px; text-align: center; color: var(--mute); }

/* ── 学生房间 ── */
.room { display: flex; flex-direction: column; gap: 18px; }
.room-hero {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "back back back"
    "id id rate"
    "actions actions actions";
  gap: 12px 18px;
  padding: 18px 20px;
  border-radius: 24px;
  background: #1f2430;
  border: 1px solid var(--line);
}
#btnBackList { grid-area: back; justify-self: start; }
.hero-id { grid-area: id; display: flex; align-items: center; gap: 14px; min-width: 0; }
.detail-avatar {
  position: relative;
  width: 72px; height: 72px; border-radius: 22px;
  overflow: hidden; display: grid; place-items: center;
  background: var(--sunken-2); border: 1px solid var(--line);
  font-size: 26px; font-weight: 800; color: var(--accent);
  flex-shrink: 0;
}
.detail-avatar img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: contain; display: block;
}
.detail-name-row { display: flex; align-items: center; gap: 8px; }
.detail-name-row h1 { margin: 0; font-size: 30px; letter-spacing: -0.03em; }
.archive-badge {
  padding: 2px 8px; border-radius: 999px; font-size: 10px;
  border: 1px solid var(--line); color: var(--mute);
}
.hero-rate { grid-area: rate; text-align: right; align-self: center; }
.rate-num {
  font-family: var(--font-display);
  font-size: 46px; font-weight: 400; letter-spacing: -0.01em;
  color: var(--ok); line-height: 1;
}
.rate-num.is-na { font-size: 22px; color: var(--mute); }
.rate-cap { font-size: 12px; color: var(--mute); margin-top: 4px; }
.hero-actions { grid-area: actions; display: flex; flex-wrap: wrap; gap: 8px; }

.room-tabs {
  display: flex; gap: 6px;
  padding: 4px;
  width: fit-content;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line);
}
.room-tab {
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid transparent;
  background: transparent; color: var(--mute);
  font-size: 13px; cursor: pointer;
}
.room-tab:hover { color: var(--ink); }
.room-tab.active {
  background: rgba(var(--accent-rgb, 91,140,255), 0.18);
  border-color: rgba(var(--accent-rgb, 91,140,255), 0.45);
  color: var(--accent-2, #c5d6ff);
  font-weight: 700;
}

.room-stream { display: flex; flex-direction: column; gap: 16px; }
.room-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 14px;
  align-items: start;
}
.room-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 16px 16px 18px;
}
.block-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px;
  margin-bottom: 12px;
}
.block-head h3 { margin: 0; font-size: 16px; flex: 1; }
.grade-guide { margin: 0 0 12px; font-size: 12px; color: var(--mute); line-height: 1.5; }

.orb-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.orb {
  padding: 14px;
  border-radius: 18px;
  background: var(--sunken);
  border: 1px solid var(--line);
}
.orb h4 { margin: 0 0 6px; font-size: 11px; color: var(--mute); font-weight: 600; }
.orb .an-big { font-size: 28px; font-weight: 800; }
.orb .an-hint { font-size: 11px; color: var(--mute); margin-top: 4px; }
.an-big.up { color: var(--ok); }
.an-big.down { color: var(--bad); }
.spark-card { padding-top: 4px; }
.spark-cap { font-size: 12px; color: var(--mute); margin-bottom: 6px; }
.an-chart { width: 100%; height: 140px; }
.an-chart svg { width: 100%; height: 100%; display: block; }
.dist-row { display: flex; align-items: center; gap: 12px; margin-top: 8px; }
.an-seg { display: flex; gap: 10px; flex-wrap: wrap; font-size: 11px; color: var(--mute); }
.an-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }

.work-stream { display: flex; flex-direction: column; gap: 8px; }
.work-card {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 8px 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--sunken);
  border: 1px solid var(--line);
}
.work-card.is-pend { border-color: var(--warn-line); background: rgba(239,123,99,0.06); }
.work-rate { font-size: 20px; font-weight: 800; color: var(--ok); font-variant-numeric: tabular-nums; }
.work-rate.na { font-size: 16px; color: var(--pend); }
.work-body h4 { margin: 0 0 4px; font-size: 15px; }
.work-meta { font-size: 12px; color: var(--mute); }
.work-bar { height: 6px; border-radius: 99px; background: rgba(255,255,255,0.06); margin-top: 8px; overflow: hidden; display: flex; }
.work-bar i { display: block; height: 100%; }
.work-bar .ok { background: var(--ok); }
.work-bar .bad { background: var(--bad); }
.work-bar .pend { background: var(--pend); }
.src-tag {
  display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px;
  font-size: 10px; font-weight: 700; border: 1px solid var(--line); color: var(--mute);
}
.src-tag.teacher { color: var(--pend); border-color: var(--pend-line); }

.wrong-board { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.wrong-card {
  display: block;
  padding: 12px;
  border-radius: 16px;
  background: var(--sunken);
  border: 1px solid var(--line);
}
.wrong-card .wc-top { display: flex; gap: 8px; align-items: flex-start; }
.wrong-card .wc-stem { font-size: 13px; line-height: 1.45; }
.wrong-card .wc-stat { margin-top: 8px; font-size: 11px; color: var(--mute); }
.tag-streak, .tag-mastered {
  display: inline-block; padding: 1px 6px; border-radius: 999px; font-size: 10px; font-weight: 700; margin-left: 4px;
}
.tag-streak { background: rgba(239,123,99,0.18); color: var(--warn-ink); }
.tag-streak.hot { background: rgba(239,123,99,0.32); }
.tag-mastered { background: var(--ok-soft); color: var(--ok-ink); }

.history-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.history-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 10px;
  padding: 8px 10px;
  border-radius: 12px;
  background: var(--sunken);
  border: 1px solid var(--line);
}
.history-card.is-open { align-items: start; }
.history-card.is-missing { border-color: var(--pend-line, rgba(239,123,99,0.35)); }
.history-card .hc-main { min-width: 0; }
.history-card .hc-title {
  font-weight: 700;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-card .hc-title b { color: var(--accent-2, #c5d6ff); margin-right: 6px; }
.history-card .hc-meta { font-size: 11px; color: var(--mute); margin-top: 2px; }
.history-card .hc-actions { display: flex; flex-wrap: wrap; gap: 4px; justify-content: flex-end; }
.hc-rate {
  display: inline-block;
  margin-left: 6px;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 800;
  color: var(--ok);
  vertical-align: middle;
}
.hc-rate.missing { color: var(--pend); font-weight: 700; font-size: 11px; }
.hc-pics {
  display: inline-block;
  margin-left: 6px;
  font-size: 10px;
  font-weight: 700;
  color: var(--mute);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 6px;
}
.backfill-panel {
  grid-column: 1 / -1;
  margin-top: 4px;
  padding: 10px;
  border-radius: 10px;
  background: var(--paper);
  border: 1px dashed var(--line);
}
.bf-drop {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 12px 10px;
  font-size: 12px;
  color: var(--mute);
  text-align: center;
  cursor: pointer;
}
.bf-drop.is-over { border-color: var(--accent, #5b8cff); color: var(--ink); background: rgba(91,140,255,0.08); }
.bf-thumbs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.bf-thumb {
  position: relative;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--sunken-2, #161b26);
}
.bf-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bf-thumb button {
  position: absolute; top: 2px; right: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  border: 0; background: rgba(0,0,0,0.65); color: #fff;
  font-size: 12px; line-height: 18px; cursor: pointer; padding: 0;
}
.bf-keep { font-size: 11px; color: var(--mute); margin-top: 6px; }
.bf-row {
  display: flex; flex-wrap: wrap; gap: 8px 12px;
  align-items: center; margin-top: 10px; font-size: 12px;
}
.bf-row label { display: flex; align-items: center; gap: 4px; color: var(--mute); }
.bf-row input[type=number] {
  width: 56px; padding: 4px 6px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--sunken); color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.bf-row input[type=date] {
  padding: 4px 6px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--sunken); color: var(--ink);
}
.bf-rate { font-weight: 800; font-variant-numeric: tabular-nums; color: var(--ok); }
.bf-actions { display: flex; gap: 6px; margin-left: auto; }
.bf-q-block { margin-top: 10px; }
.bf-q-label { font-size: 12px; color: var(--mute); margin-bottom: 6px; }
.bf-q-label .optional { font-weight: 400; opacity: 0.8; margin-left: 4px; }
.bf-q-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.bf-q-chip {
  min-width: 28px; height: 28px; padding: 0 7px;
  border-radius: 8px; border: 1px solid var(--line);
  background: var(--sunken); color: var(--mute);
  font-size: 12px; font-weight: 700; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.bf-q-chip:hover { color: var(--ink); border-color: var(--ink); }
.bf-q-chip.active {
  background: rgba(229, 62, 62, 0.16);
  border-color: rgba(229, 62, 62, 0.55);
  color: #c45c4a;
}
.bf-q-hint { font-size: 11px; color: var(--mute); margin: 6px 0 0; }
.row-btn {
  display: inline-block; padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--ink);
  font-size: 11px; cursor: pointer; text-decoration: none;
}
.row-btn.primary-ish { background: var(--bad); border-color: var(--bad); color: #fff; font-weight: 700; }
.row-btn.danger { color: #ffc4b8; }

.room-profile { display: flex; flex-direction: column; gap: 16px; }
.profile-block { max-width: 640px; }
.profile-tip { font-size: 12px; color: var(--mute); margin: 0 0 8px; line-height: 1.55; }
.avatar-row { display: flex; align-items: center; gap: 12px; margin: 12px 0; }
.avatar-preview {
  position: relative;
  width: 72px; height: 72px; border-radius: 18px; overflow: hidden;
  display: grid; place-items: center; background: var(--sunken-2); border: 1px solid var(--line);
  font-size: 11px; color: var(--mute); flex-shrink: 0;
}
.avatar-preview img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: contain; display: block;
}
.props-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.props-group.full { grid-column: 1 / -1; }
.props-group label { display: block; font-size: 11px; color: var(--mute); margin-bottom: 4px; }
.props-group input, .props-group .select-box, .select-box {
  width: 100%; padding: 8px 10px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--sunken-2); color: var(--ink); font-size: 13px;
}
.form-actions { margin-top: 14px; }
.archive-hint { font-size: 12px; color: var(--mute); }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; z-index: 100; padding: 16px;
}
.modal-box {
  width: min(520px, 100%); background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 18px; max-height: 90vh; overflow: auto;
}
.modal-title { padding: 16px 18px 0; font-size: 16px; font-weight: 800; }
.modal-body { padding: 14px 18px; font-size: 13px; line-height: 1.6; }
.modal-actions { padding: 0 18px 16px; display: flex; justify-content: flex-end; gap: 8px; }
.toast-wrap { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 200; }
.toast {
  padding: 10px 16px; border-radius: 12px; background: var(--paper);
  border: 1px solid var(--line); margin-top: 8px; font-size: 13px;
}
.toast.error { border-color: var(--warn-line); color: var(--warn-ink); }

/* 批改台 */
.view-grade {
  max-width: none;
  height: calc(100vh - 60px - 36px);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
body.is-grading .view-grade {
  height: 100vh;
  padding: 10px 14px 14px;
}
.view-grade.hidden { display: none !important; }
.grade-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.grade-who { flex: 1; min-width: 0; }
.grade-who strong { display: block; font-size: 16px; }
.grade-who span { font-size: 12px; color: var(--mute); }
.grade-score { font-size: 20px; font-weight: 800; color: var(--ok); }
.grade-score.is-pend { color: var(--pend); }
.grade-split {
  flex: 1; min-height: 0;
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.8fr); gap: 12px;
}
.grade-pics, .grade-side {
  min-height: 0; display: flex; flex-direction: column;
  background: var(--paper); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
}
.grade-pic-stage {
  flex: 1; min-height: 240px; background: var(--sunken-2);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  touch-action: none;
}
.grade-pic-stage img {
  max-width: 100%; max-height: 100%; object-fit: contain;
  transform-origin: center center;
  cursor: grab;
  user-select: none;
  -webkit-user-drag: none;
}
.grade-pic-stage.is-panning img { cursor: grabbing; }
.grade-pic-empty { color: var(--mute); }
.grade-thumbs {
  display: flex; gap: 8px; padding: 8px 10px;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  background: var(--sunken-2);
}
.grade-thumb {
  flex: 0 0 auto;
  width: 56px; height: 56px;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid transparent;
  padding: 0;
  background: var(--sunken-2);
  cursor: pointer;
}
.grade-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.grade-thumb.active { border-color: var(--accent, #5b8cff); }
.grade-blank-list { flex: 1; overflow: auto; padding: 10px; }
.grade-blank { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; background: #1c222e; }
.grade-blank.is-ok { border-color: rgba(var(--accent-rgb, 91,140,255), 0.4); }
.grade-blank.is-bad { border-color: var(--warn-line); }
.grade-blank.is-pend { border-color: var(--pend-line); }
.grade-blank-top { display: flex; justify-content: space-between; margin-bottom: 6px; }
.gb-stem { font-size: 12px; color: var(--mute); }
.gb-ans { font-size: 12px; }
.grade-acts { display: flex; gap: 6px; margin-top: 8px; }
.grade-acts button {
  flex: 1; padding: 7px; border-radius: 8px; cursor: pointer; font-weight: 700;
  border: 1px solid var(--line); background: transparent; color: var(--ink);
}
.grade-acts button.is-on.ok { background: var(--ok-soft); border-color: #5dd39e; color: var(--ok-ink); }
.grade-acts button.is-on.bad { background: rgba(239,123,99,0.2); border-color: var(--bad); color: var(--warn-ink); }
.grade-tools { border-top: 1px solid var(--line); padding: 12px; max-height: 38%; overflow: auto; }
.grade-tools textarea {
  width: 100%; min-height: 88px; padding: 8px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--sunken-2); color: var(--ink); font-size: 12px;
}

.an-card { background: #1c222e; border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.an-hint { font-size: 11px; color: var(--mute); }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.form-card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }

@media (max-width: 900px) {
  .studio { grid-template-columns: 1fr; }
  .studio-rail { position: static; min-height: 0; }
  .inbox-list { max-height: 180px; flex-direction: row; overflow-x: auto; }
  .inbox-item { min-width: 180px; }
  .orb-row { grid-template-columns: 1fr; }
  .room-split { grid-template-columns: 1fr; }
  .work-card { grid-template-columns: 1fr; }
  .grade-split { grid-template-columns: 1fr; }
  .view-grade { height: auto; }
}

/* ════ 精修层：动效 / 骨架屏 / 空态 / 组件细化 ════ */

/* 图例色统一走 token */
.an-dot.ok { background: var(--ok); }
.an-dot.bad { background: var(--warn); }
.an-dot.pend { background: var(--pend); }
.an-small { font-size: 14px; color: var(--mute); font-weight: 600; }
.muted.is-bad-text { color: var(--warn-ink); }
.gb-ai { margin-top: 4px; }

/* 视图切换过渡 */
.view:not(.hidden) { animation: viewIn var(--t-mid); }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* 学生卡片入场 stagger + 待批徽标脉动 */
.student-card { animation: cardIn .35s var(--ease) backwards; }
.student-card:nth-child(1) { animation-delay: .02s; }
.student-card:nth-child(2) { animation-delay: .06s; }
.student-card:nth-child(3) { animation-delay: .1s; }
.student-card:nth-child(4) { animation-delay: .14s; }
.student-card:nth-child(5) { animation-delay: .18s; }
.student-card:nth-child(6) { animation-delay: .22s; }
.student-card:nth-child(7) { animation-delay: .26s; }
.student-card:nth-child(8) { animation-delay: .3s; }
@keyframes cardIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.sc-badge { animation: badgePulse 2.4s ease-in-out infinite; }
@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,123,99,0.35); }
  50% { box-shadow: 0 0 0 5px rgba(239,123,99,0); }
}
/* 无头像：品牌渐变底 + 姓氏 */
.student-card .avatar-lg {
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(var(--accent-rgb, 91,140,255), 0.22), transparent 60%),
    var(--sunken-2);
}
/* 有头像：浅纸色垫底，透明 PNG 浮在上面 */
.student-card .avatar-lg.avatar-matte,
.detail-avatar.avatar-matte,
.avatar-preview.avatar-matte,
.pf-avatar.avatar-matte {
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(255,255,255,0.78), transparent 58%),
    linear-gradient(165deg, #fbf6ea 0%, #efe2c9 55%, #e8d5b0 100%);
  color: #4a4136;
}
.tb-btn.icon-only { padding: 8px 10px; }
.tb-btn svg { flex-shrink: 0; }

/* 房间 hero：渐变 + accent 光晕 + 按钮分组 */
.room-hero {
  position: relative;
  background:
    radial-gradient(90% 140% at 100% 0%, rgba(var(--accent-rgb, 91,140,255), 0.12), transparent 55%),
    var(--bg-2);
  overflow: hidden;
}
.room-hero::after {
  content: ''; position: absolute; right: -60px; top: -60px;
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb, 91,140,255), 0.16), transparent 70%);
  pointer-events: none;
}
.hero-actions { gap: 10px 14px; }
.hero-main, .hero-side { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.hero-side { margin-left: auto; }
.btn-hero-primary {
  padding: 10px 22px; font-size: 13px;
  background: rgba(var(--accent-rgb, 91,140,255), 0.28);
  border-color: rgba(var(--accent-rgb, 91,140,255), 0.5);
}

/* 骨架屏 */
.sk {
  position: relative; overflow: hidden;
  background: rgba(255,255,255,0.06); border-radius: 8px;
}
.sk::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}
.sk-card {
  display: flex; flex-direction: column; gap: 8px;
  border-radius: var(--r-lg); border: 1px solid var(--line);
  background: var(--paper); padding: 0 14px 14px;
}
.sk-avatar { aspect-ratio: 1 / 1; height: auto; border-radius: 0; margin: 0 -14px; }
.sk-line { height: 14px; }
.sk-line.w60 { width: 60%; }
.sk-line.w40 { width: 40%; }
.sk-line.w80 { width: 80%; }
.sk-block { height: 60px; border-radius: var(--r-md); margin-top: auto; }
.sk-pill { height: 58px; border-radius: var(--r-md); }
.sk-row { display: flex; flex-direction: column; gap: 8px; padding: 12px; border-radius: var(--r-md); border: 1px solid var(--line); }
.sk-num { width: 52px; height: 24px; }
.orb .sk-block { margin-top: 0; }

/* 空态 */
.empty-text {
  display: block; border-radius: var(--r-md);
  border: 1px dashed var(--line);
  font-size: 13px; line-height: 1.6;
}
.inbox-empty { color: var(--ok-ink); border-color: rgba(93,211,158,0.25); }

.modal-overlay:not(.hidden) { animation: fadeIn var(--t-fast); }
.modal-overlay:not(.hidden) .modal-box { animation: popIn var(--t-mid); }
@keyframes fadeIn { from { opacity: 0; } }
@keyframes popIn { from { transform: scale(0.96) translateY(8px); opacity: 0; } }

/* modal 辅助文案 */
.modal-tip { font-size: 12px; color: var(--mute); margin: 6px 0 0; line-height: 1.6; }
.modal-tip.warn { color: var(--warn-ink); }

/* toast 上滑入场 */
.toast { animation: toastIn var(--t-mid); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
}

/* 话术工具（批改台 / 提交详情共用） */
.gt-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.gt-vision { margin: 0 0 8px; }
.gt-foot { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
.fb-textarea {
  width: 100%; min-height: 100px; padding: 10px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--sunken-2); color: var(--ink);
  font-size: 13px; line-height: 1.55; resize: vertical; font-family: inherit;
}
.fb-detail-card { margin-top: 14px; }
.fb-detail-title { margin: 0 0 8px; font-size: 13px; }

/* 站点设置弹窗 */
.ss-lead { font-size: 13px; line-height: 1.65; color: var(--ink); margin: 0; }
.ss-list { margin: 8px 0 0; padding-left: 18px; font-size: 12px; color: var(--mute); line-height: 1.7; }
.ss-list code { color: var(--accent-2, #c5d6ff); }
.ss-label { display: block; font-size: 11px; color: var(--mute); margin-top: 12px; }
.ss-input {
  width: 100%; padding: 8px 10px; margin-top: 4px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--sunken-2); color: var(--ink); font-size: 13px;
}
.ss-toggle { display: flex; align-items: center; gap: 8px; margin-top: 14px; font-size: 12px; color: var(--ink); }
.ss-note { font-size: 11px; color: var(--mute); margin: 6px 0 0; }

/* 批改台：缩放控制条 + 快捷键提示 */
.grade-zoom-bar {
  display: flex; align-items: center; justify-content: center; gap: 4px;
  padding: 5px 8px;
  border-top: 1px solid var(--line);
  background: var(--sunken-2);
}
.zoom-tip { margin-left: 10px; font-size: 11px; color: var(--mute); }
.zoom-btn {
  min-width: 28px; height: 28px; padding: 0 8px; border-radius: 999px;
  border: none; background: transparent; color: var(--ink);
  font-size: 14px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center;
}
.zoom-btn:hover { background: rgba(255,255,255,0.1); }
.zoom-btn.wide { font-size: 12px; }
.zoom-label {
  min-width: 48px; text-align: center; font-size: 12px;
  color: var(--mute); font-variant-numeric: tabular-nums;
}
.kbd-hint { font-size: 11px; color: var(--mute); display: inline-flex; align-items: center; gap: 3px; }
.kbd-hint kbd {
  padding: 1px 5px; border-radius: 5px; font-size: 10px; font-family: inherit;
  border: 1px solid var(--line); background: var(--sunken); color: var(--mute);
}
/* 图表入场淡入 */
.an-chart { animation: viewIn .4s var(--ease); }

/* 批改台：作答 vs 标准答案对照块 */
.gb-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  margin: 8px 0 2px;
}
.gb-cell {
  min-width: 0; padding: 8px 10px; border-radius: 10px;
  background: var(--sunken-2); border: 1px solid var(--line);
}
.gb-cell .gb-k {
  display: block; font-size: 10px; color: var(--mute);
  font-weight: 700; letter-spacing: 0.06em; margin-bottom: 4px;
}
.gb-cell b {
  font-size: 13px; color: var(--ink); line-height: 1.5; word-break: break-all;
}
.gb-cell.std {
  background: rgba(13, 110, 106, 0.14);
  border-color: rgba(13, 110, 106, 0.4);
}
.gb-cell.std .gb-k { color: #6fc7c0; }
.gb-cell.std b { color: #b8ece7; }
.gb-none { font-style: normal; font-size: 11px; color: var(--mute); font-weight: 400; }

/* 勾/叉判分按钮 */
.grade-acts { display: flex; gap: 8px; margin-top: 10px; }
.grade-acts .vg {
  flex: 1; height: 42px; border-radius: 10px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); background: transparent; color: var(--mute);
  transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast), transform .1s;
}
.grade-acts .vg svg { width: 20px; height: 20px; }
.grade-acts .vg:active { transform: scale(0.94); }
.grade-acts .vg.ok:hover { border-color: var(--ok); color: var(--ok-ink); }
.grade-acts .vg.bad:hover { border-color: var(--bad); color: var(--warn-ink); }
.grade-acts .vg.ok.is-on { background: var(--ok-soft); border-color: #5dd39e; color: var(--ok-ink); }
.grade-acts .vg.bad.is-on { background: rgba(239,123,99,0.2); border-color: var(--bad); color: var(--warn-ink); }

/* 待批跳转按钮 */
.tb-btn.pend-jump {
  background: var(--warn-soft); border-color: var(--warn-line);
  color: var(--warn-ink); font-weight: 700;
}
.grade-blank.is-flash-target { animation: pendFlash 1.2s var(--ease); }
@keyframes pendFlash {
  0% { box-shadow: 0 0 0 0 var(--warn-glow); }
  100% { box-shadow: 0 0 0 8px rgba(239,123,99,0); }
}

/* 卷面主图点击放大 */
.grade-pic-stage img { cursor: zoom-in; }

@media (max-width: 640px) {
  .gb-compare { grid-template-columns: 1fr; }
}

/* ════ 学生档案卡：纸色展示卡 ════ */
.pf-card {
  background:
    radial-gradient(140% 90% at 18% 0%, rgba(255,255,255,0.55), transparent 55%),
    repeating-linear-gradient(0deg, transparent, transparent 26px, rgba(180,150,110,0.09) 27px),
    #f7efe0;
  color: #241f18;
  border-radius: 18px;
  padding: 18px 16px 12px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.7) inset, 0 12px 32px rgba(0,0,0,0.38);
}
.pf-card, .pf-card * { box-sizing: border-box; }

.pf-head { display: flex; gap: 14px; align-items: flex-start; }
.pf-avatar {
  position: relative;
  width: 72px; height: 72px; border-radius: 18px; flex-shrink: 0;
  display: grid; place-items: center; overflow: hidden;
  background: #efe6d4; border: 1px solid #e2d5bc;
  font-size: 26px; font-weight: 800; color: #0d6e6a;
}
.pf-avatar img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: contain; display: block;
}
.pf-avatar.avatar-matte { border-color: #e2d5bc; }
.pf-id { min-width: 0; flex: 1; }
.pf-name {
  font-family: var(--font-song);
  font-size: 26px; font-weight: 400; letter-spacing: 0.04em; line-height: 1.15;
}
.pf-archived {
  display: inline-block; margin-left: 8px; padding: 1px 8px;
  border: 1px solid #cbbfa4; border-radius: 999px;
  font-size: 10px; font-weight: 700; color: #8a7f6d; vertical-align: 3px;
}
.pf-badges { margin-top: 5px; display: flex; flex-wrap: wrap; gap: 4px 6px; }
.pf-badges span {
  padding: 2px 8px; border-radius: 999px;
  background: rgba(13,110,106,0.08); border: 1px solid rgba(13,110,106,0.22);
  font-size: 11px; font-weight: 600; color: #0d6e6a;
}
.pf-joined { margin-top: 6px; font-size: 12px; color: #8a7f6d; font-family: var(--font-kai); }
.pf-zhongkao {
  display: inline-block; margin-top: 7px; padding: 2px 10px;
  border-radius: 999px; font-size: 11px; font-weight: 800;
  background: rgba(13,110,106,0.12); border: 1.5px solid rgba(13,110,106,0.55);
  color: #0d6e6a;
}

.pf-tiles {
  margin-top: 14px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.pf-tile {
  padding: 10px 10px 8px; border-radius: 12px;
  background: #fffaf1; border: 1px solid #e2d5bc;
  box-shadow: 0 1px 0 rgba(255,255,255,0.8) inset;
}
.pf-tile b {
  display: block; font-size: 20px; font-weight: 400; color: #1c1814;
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums; line-height: 1.15;
}
.pf-tile span { display: block; margin-top: 3px; font-size: 10px; color: #8a7f6d; letter-spacing: 0.04em; }
.pf-tile.warn b { color: #b45309; }
.pf-tile.warn { border-color: #ecc48a; background: #fdf3e3; }

.pf-sec-title {
  margin: 16px 0 6px; font-size: 11px; font-weight: 800;
  letter-spacing: 0.1em; color: #a4977e;
}
.pf-spark { background: #fffaf1; border: 1px solid #e2d5bc; border-radius: 12px; padding: 6px 6px 2px; }
.pf-spark-svg { width: 100%; height: 76px; display: block; }
.pf-empty-line {
  padding: 12px; border: 1px dashed #d9ccb2; border-radius: 12px;
  font-size: 12px; color: #8a7f6d; text-align: center;
}

.pf-timeline { display: flex; flex-direction: column; }
.pf-ev { display: grid; grid-template-columns: 44px 16px 1fr; align-items: baseline; }
.pf-ev-date { font-size: 11px; color: #a4977e; font-variant-numeric: tabular-nums; text-align: right; }
.pf-ev-dot { position: relative; height: 100%; min-height: 26px; }
.pf-ev-dot::before {
  content: ''; position: absolute; left: 6px; top: 5px;
  width: 7px; height: 7px; border-radius: 50%;
  background: #0d6e6a; box-shadow: 0 0 0 3px rgba(13,110,106,0.14);
}
.pf-ev:not(:last-child) .pf-ev-dot::after {
  content: ''; position: absolute; left: 9px; top: 16px; bottom: -4px;
  width: 1px; background: #e2d5bc;
}
.pf-ev.assign .pf-ev-dot::before { background: #4a4136; box-shadow: 0 0 0 3px rgba(74,65,54,0.12); }
.pf-ev-text { font-size: 12px; color: #241f18; padding: 2px 0 10px; line-height: 1.45; min-width: 0; }
.pf-month {
  margin: 8px 0 4px; font-size: 11px; font-weight: 800;
  letter-spacing: 0.08em; color: #a4977e;
}
.pf-more {
  display: block; width: 100%; margin-top: 8px; padding: 7px 10px;
  border-radius: 10px; border: 1px dashed #d9ccb2;
  background: transparent; color: #4a4136;
  font-size: 12px; cursor: pointer; font-family: inherit;
}
.pf-more:hover { background: #fffaf1; }

.pf-note {
  margin: 14px 0 0; padding: 10px 12px;
  border-left: 3px solid rgba(13,110,106,0.5);
  background: rgba(13,110,106,0.06); border-radius: 0 10px 10px 0;
  font-size: 13px; color: #4a4136; line-height: 1.7;
  font-family: var(--font-zhuo);
}
.pf-foot {
  margin-top: 14px; padding-top: 10px; border-top: 1px dashed #d9ccb2;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 10px; color: #a4977e; letter-spacing: 0.06em;
}
.pf-seal {
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1.5px solid rgba(13,110,106,0.65); color: #0d6e6a;
  font-family: var(--font-kangxi);
  font-size: 14px; font-weight: 400;
  transform: rotate(-12deg); opacity: 0.85;
}

@media (max-width: 640px) {
  .pf-tiles { grid-template-columns: repeat(2, 1fr); }
  .pf-name { font-size: 21px; }
}

@media (max-width: 640px) {
  .main { padding: 12px 12px 32px; }
  .list-title { font-size: 22px; }
  .detail-name-row h1 { font-size: 24px; }
  .rate-num { font-size: 34px; }
  .hero-main, .hero-side { width: 100%; }
  .hero-side { margin-left: 0; }
  .btn-hero-primary { flex: 1; }
  .grade-head { gap: 6px; }
  .kbd-hint { display: none; }
  .student-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}