/* 审校页样式：抽自设计稿 教材勘误-standalone-src.html 的内联 <style>。
   含全局 reset + .app/.topbar/.rail/.card/.diff/.toast/.modal 等。 */
  *, *::before, *::after { box-sizing: border-box; }
  html, body { height: 100%; margin: 0; }
  body {
    font-family: var(--spectrum-font-family-base);
    color: var(--spectrum-text-primary);
    background: var(--spectrum-background-base);
    -webkit-font-smoothing: antialiased;
  }

  .app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--spectrum-background-base);
    color: var(--spectrum-text-primary);
    /* accent remap so the tweakable accent flows into Spectrum components */
    --accent: #0265DC;
    --spectrum-accent-bg-default: var(--accent);
    --spectrum-accent-bg-hover: color-mix(in srgb, var(--accent) 86%, black);
    --spectrum-accent-bg-down: color-mix(in srgb, var(--accent) 74%, black);
    --spectrum-accent-color-900: var(--accent);
    --spectrum-accent-color-1000: var(--accent);
  }

  /* ── top bar ── */
  .topbar {
    flex: 0 0 auto;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;                 /* 与左侧栏(rail)16px 内边距对齐，返回键与「书稿/目录」同列 */
    background: var(--spectrum-background-base);
    border-bottom: 1px solid var(--spectrum-border-default);
  }
  .brand { display: flex; align-items: center; gap: 12px; }
  .brand-mark {
    width: 34px; height: 34px; border-radius: var(--spectrum-corner-radius-medium);
    background: var(--accent); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 700;
  }
  .brand-text h1 {
    margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -0.01em;
    line-height: 1.1; color: var(--spectrum-text-primary);
  }
  .brand-sub { font-size: 12px; color: var(--spectrum-text-tertiary); }
  .topbar-right { display: flex; align-items: center; gap: 10px; }

  /* both controls share the same 44px-tall pill shape so they read as a set */
  .mode-ctrl, .progress-stat {
    display: inline-flex; align-items: center; gap: 12px; height: 44px;
    padding: 0 14px; border-radius: var(--spectrum-corner-radius-medium);
    background: var(--spectrum-background-layer-1); border: 1px solid var(--spectrum-border-default);
  }
  .ctrl-stack { display: flex; flex-direction: column; gap: 2px; line-height: 1.15; text-align: left; }
  .ctrl-label {
    font-size: 10px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--spectrum-text-tertiary);
  }
  .ctrl-value { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); }

  .mode-ctrl {
    font-family: inherit; cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease;
  }
  .mode-ctrl:hover { background: var(--spectrum-overlay-hover); border-color: var(--spectrum-border-strong); }
  .ctrl-chevron { color: var(--spectrum-text-tertiary); flex: 0 0 auto; }

  .progress-num { font-size: 16px; font-weight: 700; color: var(--spectrum-text-primary); font-variant-numeric: tabular-nums; }
  .progress-den { font-size: 13px; font-weight: 400; color: var(--spectrum-text-tertiary); }
  .ring { flex: 0 0 auto; transform: rotate(-90deg); }
  .ring-track { fill: none; stroke: var(--spectrum-gray-200); stroke-width: 4; }
  .ring-fill {
    fill: none; stroke: var(--spectrum-positive-color); stroke-width: 4; stroke-linecap: round;
    transition: stroke-dashoffset 320ms ease;
  }

  /* ── body split ── */
  .body { flex: 1 1 auto; display: flex; min-height: 0; }

  /* ── filter rail ── */
  .rail {
    flex: 0 0 282px;
    overflow-y: auto;
    padding: 18px 16px 28px;
    background: var(--spectrum-background-layer-1);
    border-right: 1px solid var(--spectrum-border-default);
    display: flex; flex-direction: column; gap: 14px;
  }
  .rail-block { display: flex; flex-direction: column; gap: 8px; }
  .rail-head {
    font-size: 11px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase;
    color: var(--spectrum-text-tertiary); display: flex; align-items: center; justify-content: space-between;
  }
  .rail-dl-all {
    display: inline-flex; align-items: center; gap: 5px;
    font-family: inherit; font-weight: 600; letter-spacing: 0; text-transform: none; font-size: 12px;
    color: var(--accent); background: transparent; border: none; cursor: pointer; padding: 2px 4px;
    border-radius: var(--spectrum-corner-radius-small); transition: background 120ms ease;
  }
  .rail-dl-all:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
  .rail-dl-all svg { width: 13px; height: 13px; }

  .ch-list { display: flex; flex-direction: column; gap: 1px; }
  .ch-row {
    display: flex; align-items: stretch; gap: 2px;
    border-radius: var(--spectrum-corner-radius-medium); transition: background 130ms ease;
  }
  .ch-row:hover { background: var(--spectrum-overlay-hover); }
  .ch-row[data-active] { background: var(--spectrum-overlay-selected); }
  .ch-main {
    flex: 1 1 auto; display: flex; align-items: center; justify-content: space-between; gap: 10px;
    padding: 7px 4px 7px 10px; border: none; background: transparent;
    border-radius: var(--spectrum-corner-radius-medium);
    font-family: inherit; font-size: 13.5px; color: var(--spectrum-text-secondary);
    cursor: pointer; text-align: left; min-width: 0;
  }
  .ch-row[data-active] .ch-main { color: var(--accent); font-weight: 600; }
  .ch-label { flex: 1 1 auto; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .ch-count { font-size: 12.5px; font-variant-numeric: tabular-nums; color: var(--spectrum-text-tertiary); }
  .ch-row[data-active] .ch-count { color: var(--accent); }
  .ch-dl {
    flex: 0 0 auto; width: 30px; display: flex; align-items: center; justify-content: center;
    border: none; background: transparent; color: var(--spectrum-text-tertiary);
    border-radius: var(--spectrum-corner-radius-medium); cursor: pointer;
    transition: background 120ms ease, color 120ms ease;
  }
  .ch-dl:hover { background: var(--spectrum-overlay-hover); color: var(--accent); }

  .pill-wrap { display: flex; flex-wrap: wrap; gap: 6px; }
  .pill {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 4px 10px; border: 1px solid var(--spectrum-border-default);
    background: var(--spectrum-background-base); border-radius: var(--spectrum-corner-radius-pill);
    font-family: inherit; font-size: 13px; color: var(--spectrum-text-secondary);
    cursor: pointer; transition: background 130ms ease, border-color 130ms ease, color 130ms ease;
  }
  .pill:hover { background: var(--spectrum-overlay-hover); border-color: var(--spectrum-border-strong); }
  .pill[data-active] { background: var(--accent); border-color: var(--accent); color: #fff; }
  .pill-count {
    font-size: 11px; font-variant-numeric: tabular-nums; color: var(--spectrum-text-tertiary);
  }
  .pill[data-active] .pill-count { color: rgba(255,255,255,0.82); }

  /* ── content ── */
  .content { flex: 1 1 auto; min-width: 0; overflow-y: auto; display: flex; flex-direction: column; }

  .toolbar {
    position: sticky; top: 0; z-index: 5;
    display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
    /* 全宽底边/毛玻璃保留，但内容收进与卡片对齐的居中 1000px 列 */
    padding: 4px max(28px, calc((100% - 1000px) / 2));
    background: color-mix(in srgb, var(--spectrum-background-base) 92%, transparent);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--spectrum-border-default);
  }
  .tabs { display: flex; align-items: stretch; gap: 6px; }
  .tab {
    position: relative; border: none; background: transparent; font-family: inherit;
    font-size: 14px; color: var(--spectrum-text-secondary); padding: 12px 4px; cursor: pointer;
    display: inline-flex; align-items: center; gap: 7px; transition: color 120ms ease;
  }
  .tab:hover { color: var(--spectrum-text-primary); }
  .tab[data-active] { color: var(--spectrum-text-primary); font-weight: 600; }
  .tab[data-active]::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
    background: var(--accent); border-radius: 2px 2px 0 0;
  }
  .tab-count {
    font-size: 11px; font-variant-numeric: tabular-nums; min-width: 18px; padding: 0 5px; height: 17px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--spectrum-background-layer-2); color: var(--spectrum-text-tertiary);
    border-radius: var(--spectrum-corner-radius-pill);
  }
  .tab[data-active] .tab-count { background: var(--accent); color: #fff; }
  .toolbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
  .sel-summary { font-size: 13px; color: var(--spectrum-text-secondary); }
  .sel-summary strong { color: var(--spectrum-text-primary); font-weight: 700; }

  /* ── list ── */
  .list { padding: 20px 28px 64px; display: flex; flex-direction: column; gap: 12px; max-width: 1000px; margin: 0 auto; width: 100%; }

  .card {
    display: flex; gap: 14px; align-items: flex-start; cursor: pointer;
    padding: 16px 18px; background: var(--spectrum-gray-50);
    border: 1px solid var(--spectrum-border-default);
    border-radius: var(--spectrum-corner-radius-large);
    transition: border-color 130ms ease, box-shadow 130ms ease, background 130ms ease;
  }
  .card:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
  .card:hover { box-shadow: 0 1px 4px var(--spectrum-dropshadow); border-color: var(--spectrum-border-strong); }
  .card[data-selected] {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
    background: color-mix(in srgb, var(--accent) 4%, var(--spectrum-gray-50));
  }
  .card[data-applied] { background: var(--spectrum-background-layer-1); cursor: default; }
  .card[data-applied]:hover { box-shadow: none; }
  .card[data-applied] .card-note, .card[data-applied] .diff { opacity: 0.62; }
  .card[data-ignored] { background: var(--spectrum-background-layer-1); cursor: default; }
  .card[data-ignored]:hover { box-shadow: none; }
  .card[data-ignored] .card-note, .card[data-ignored] .diff { opacity: 0.5; }

  .card-gutter {
    flex: 0 0 auto; min-width: 30px; padding-top: 1px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
  }
  .gutter-check[aria-pressed="true"] {
    background: var(--accent); border-color: var(--accent); color: #fff;
  }
  .gutter-check:hover { border-color: var(--spectrum-border-strong); color: var(--spectrum-text-secondary); }
  .gutter-check[aria-pressed="true"]:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
  .gutter-btn {
    width: 28px; height: 28px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-base);
    color: var(--spectrum-text-tertiary); cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
  }
  .gutter-btn svg { width: 15px; height: 15px; }
  .gutter-ignore:hover { background: var(--spectrum-red-100); border-color: var(--spectrum-red-400); color: var(--spectrum-negative-color); }
  .gutter-restore {
    background: var(--spectrum-gray-200); border-color: var(--spectrum-gray-300); color: var(--spectrum-gray-700);
  }
  .gutter-restore:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
  .gutter-tick.applied {
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--spectrum-positive-color); color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700;
  }
  .card-main { flex: 1 1 auto; min-width: 0; }

  .card-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
  .card-loc { font-size: 12.5px; color: var(--spectrum-text-tertiary); font-variant-numeric: tabular-nums; }
  .card-applied-chip {
    margin-left: auto; font-size: 11px; font-weight: 600; color: var(--spectrum-positive-color);
    background: var(--spectrum-green-100); padding: 2px 8px; border-radius: var(--spectrum-corner-radius-pill);
  }
  .card-ignored-chip {
    margin-left: auto; font-size: 11px; font-weight: 600; color: var(--spectrum-text-tertiary);
    background: var(--spectrum-gray-200); padding: 2px 8px; border-radius: var(--spectrum-corner-radius-pill);
  }
  .card-note { margin: 0 0 12px; font-size: 13.5px; line-height: 1.5; color: var(--spectrum-text-secondary); }

  /* ── inline "查看原文" link, trailing the original-text line ── */
  .src-link {
    display: inline-flex; align-items: center; gap: 4px; vertical-align: baseline;
    margin-left: 10px; padding: 1px 7px; border-radius: var(--spectrum-corner-radius-small);
    font-family: inherit; font-size: 12.5px; font-weight: 600; line-height: 1.4;
    color: var(--spectrum-informative-color); background: transparent;
    border: 1px solid transparent; cursor: pointer; white-space: nowrap;
    transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
  }
  .src-link:hover { background: var(--spectrum-blue-100); border-color: var(--spectrum-blue-200); }
  .src-link[data-open] { background: var(--spectrum-blue-100); border-color: var(--spectrum-informative-color); }
  .src-link svg { flex: 0 0 auto; width: 13px; height: 13px; }

  /* ── source-context preview popover ── */
  .src-pop {
    position: fixed; z-index: 80; box-sizing: border-box;
    background: var(--spectrum-background-elevated);
    border: 1px solid var(--spectrum-border-default);
    border-radius: var(--spectrum-corner-radius-large);
    box-shadow: 0 12px 40px var(--spectrum-dropshadow);
    padding: 16px 18px; animation: src-in 130ms cubic-bezier(0.45,0,0.40,1);
  }
  @keyframes src-in { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
  .src-pop[data-up] { animation-name: src-in-up; }
  @keyframes src-in-up { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
  .src-pop-head {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding-bottom: 11px; margin-bottom: 11px; border-bottom: 1px solid var(--spectrum-border-default);
  }
  .src-file {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 13px; font-weight: 700; color: var(--spectrum-text-primary);
  }
  .src-file svg { color: var(--spectrum-informative-color); }
  .src-loc { font-size: 12px; color: var(--spectrum-text-tertiary); font-variant-numeric: tabular-nums; white-space: nowrap; }
  .src-para {
    margin: 0; font-size: 14.5px; line-height: 1.85; color: var(--spectrum-text-secondary);
    text-indent: 2em; text-align: justify;
  }
  .src-focus { color: var(--spectrum-text-primary); }
  .src-mark {
    background: color-mix(in srgb, var(--spectrum-yellow-400) 80%, transparent);
    color: var(--spectrum-text-primary); border-radius: 3px; padding: 1px 3px;
    font-weight: 700; box-shadow: 0 0 0 1px color-mix(in srgb, var(--spectrum-yellow-700) 50%, transparent);
  }
  .src-pop-foot {
    margin-top: 13px; padding-top: 11px; border-top: 1px solid var(--spectrum-border-default);
    display: flex; flex-direction: column; gap: 6px;
  }
  .src-legend { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--spectrum-text-tertiary); }
  .src-legend-dot { width: 10px; height: 10px; border-radius: 3px; background: color-mix(in srgb, var(--spectrum-yellow-400) 80%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--spectrum-yellow-700) 50%, transparent); }
  .src-suggest { font-size: 12.5px; color: var(--spectrum-text-secondary); line-height: 1.5; }
  .src-suggest strong { color: var(--spectrum-positive-color); font-weight: 700; }

  .diff { display: flex; flex-direction: column; gap: 6px; }
  .diff-line {
    display: flex; gap: 10px; align-items: baseline;
    padding: 8px 12px; border-radius: var(--spectrum-corner-radius-medium);
    font-size: 14.5px; line-height: 1.55;
  }
  .diff-line.del { background: color-mix(in srgb, var(--spectrum-red-100) 65%, var(--spectrum-gray-50)); }
  .diff-line.add { background: color-mix(in srgb, var(--spectrum-green-100) 50%, var(--spectrum-gray-50)); }
  .diff-gutter { flex: 0 0 auto; width: 12px; text-align: center; font-weight: 700; }
  .diff-line.del .diff-gutter { color: var(--spectrum-red-900); }
  .diff-line.add .diff-gutter { color: var(--spectrum-green-900); }
  .diff-text { color: var(--spectrum-text-primary); word-break: break-word; }
  .diff-chg { border-radius: 3px; padding: 0 2px; font-weight: 600; }
  .diff-chg.del { background: color-mix(in srgb, var(--spectrum-red-400) 70%, transparent); color: var(--spectrum-red-1000); text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--spectrum-red-1000) 55%, transparent); }
  .diff-chg.add { background: color-mix(in srgb, var(--spectrum-green-400) 70%, transparent); color: var(--spectrum-green-1100); }

  /* ── empty ── */
  .empty {
    margin: 48px auto; text-align: center; color: var(--spectrum-text-tertiary);
    display: flex; flex-direction: column; align-items: center; gap: 6px;
  }
  .empty-mark {
    width: 48px; height: 48px; border-radius: 50%; margin-bottom: 6px;
    background: var(--spectrum-background-layer-2); color: var(--spectrum-text-tertiary);
    display: flex; align-items: center; justify-content: center; font-size: 22px;
  }
  .empty p { margin: 0; font-size: 15px; color: var(--spectrum-text-secondary); font-weight: 600; }
  .empty span { font-size: 13px; }

  /* ── toast ── */
  .toast {
    position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
    background: var(--spectrum-neutral-bg-default); color: var(--spectrum-text-inverse);
    padding: 11px 18px; border-radius: var(--spectrum-corner-radius-large);
    font-size: 13.5px; box-shadow: 0 8px 24px var(--spectrum-dropshadow); z-index: 50;
    animation: toast-in 200ms cubic-bezier(0.45,0,0.40,1);
  }
  @keyframes toast-in { from { opacity: 0; transform: translate(-50%, 10px); } to { opacity: 1; transform: translate(-50%, 0); } }

  /* ── modify-mode dialog ── */
  .modal-backdrop {
    position: fixed; inset: 0; background: var(--spectrum-overlay-modal);
    display: flex; align-items: center; justify-content: center; z-index: 60;
    animation: fade 120ms ease;
  }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
  .modal {
    width: 470px; max-width: calc(100vw - 32px);
    background: var(--spectrum-background-elevated);
    border-radius: var(--spectrum-corner-radius-large);
    box-shadow: 0 16px 48px var(--spectrum-dropshadow); padding: 24px;
    animation: modal-in 160ms cubic-bezier(0.45,0,0.40,1);
  }
  @keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
  .modal-title { margin: 0 0 4px; font-size: 18px; font-weight: 700; color: var(--spectrum-text-primary); }
  .modal-sub { margin: 0 0 18px; font-size: 13px; color: var(--spectrum-text-tertiary); line-height: 1.5; }
  .mode-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
  .mode-option {
    display: flex; gap: 12px; align-items: flex-start; text-align: left;
    padding: 14px; border: 1px solid var(--spectrum-border-default);
    border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-base);
    cursor: pointer; font-family: inherit; transition: border-color 120ms ease, background 120ms ease;
  }
  .mode-option:hover { border-color: var(--spectrum-border-strong); }
  .mode-option[data-active] { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 5%, var(--spectrum-background-base)); }
  .mode-radio {
    flex: 0 0 auto; width: 18px; height: 18px; margin-top: 1px; border-radius: 50%;
    border: 2px solid var(--spectrum-border-strong); transition: border-color 120ms ease; position: relative;
  }
  .mode-option[data-active] .mode-radio { border-color: var(--accent); }
  .mode-option[data-active] .mode-radio::after { content: ''; position: absolute; inset: 3px; border-radius: 50%; background: var(--accent); }
  .mode-text { display: flex; flex-direction: column; gap: 4px; }
  .mode-name { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); display: flex; align-items: center; gap: 8px; }
  .mode-default { font-size: 10px; font-weight: 700; letter-spacing: 0.04em; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); padding: 1px 6px; border-radius: var(--spectrum-corner-radius-pill); }
  .mode-desc { font-size: 12.5px; color: var(--spectrum-text-tertiary); line-height: 1.5; }
  .modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

  /* ── compact density ── */
  .app.is-compact .list { gap: 8px; }
  .app.is-compact .card { padding: 11px 14px; }
  .app.is-compact .card-note { margin-bottom: 8px; }
  .app.is-compact .diff-line { padding: 6px 10px; font-size: 13.5px; }
  .app.is-compact .rail-block { gap: 6px; }
  .app.is-compact .ch-row { padding: 5px 10px; }

  /* responsive */
  @media (max-width: 900px) {
    .rail { flex-basis: 240px; }
  }

  /* ── 真实后端适配补充 ── */
  .src-pop { max-height: 60vh; overflow-y: auto; }
  .src-para.src-dim { color: var(--spectrum-text-tertiary); }
  .src-para + .src-para { margin-top: 8px; }
  .boot {
    min-height: 100vh; display: flex; flex-direction: column; gap: 14px;
    align-items: center; justify-content: center;
    background: var(--spectrum-background-base); color: var(--spectrum-text-tertiary); font-size: 14px;
  }
  .boot-mark {
    width: 48px; height: 48px; border-radius: var(--spectrum-corner-radius-medium);
    background: #0265DC; color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 24px; font-weight: 700;
  }

  /* 修复：Spectrum 按钮的 hover/active 覆盖层(div,inset:0)默认画在文字之上，
     实色 accent 会盖住白字。给按钮单独建层叠上下文，再把覆盖层压到文字之下、
     按钮底色之上（负 z-index 才生效）。 */
  button:has(> div[style*="inset: 0"]) { isolation: isolate; }
  button > div[style*="position: absolute"][style*="inset: 0"] { z-index: -1; }

  /* ── 右侧分屏：完整 Word 文档查看器 ── */
  .docview {
    flex: 0 0 50vw; min-width: 360px; display: flex; flex-direction: column;
    border-left: 1px solid var(--spectrum-border-default);
    background: var(--spectrum-background-base);
  }
  .docview-head {
    flex: 0 0 auto; height: 44px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 14px; border-bottom: 1px solid var(--spectrum-border-default);
    background: var(--spectrum-background-layer-1);
  }
  .docview-title { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 700; color: var(--spectrum-text-primary); }
  .docview-title svg { color: var(--spectrum-informative-color); }
  .docview-close {
    border: none; background: transparent; cursor: pointer; font-size: 15px;
    width: 28px; height: 28px; border-radius: var(--spectrum-corner-radius-medium); color: var(--spectrum-text-tertiary);
  }
  .docview-close:hover { background: var(--spectrum-overlay-hover); color: var(--spectrum-text-primary); }
  .docview-body { flex: 1 1 auto; overflow-y: auto; padding: 22px 28px 64px; }
  .docview-msg { color: var(--spectrum-text-tertiary); font-size: 14px; padding: 20px 0; }
  .docview-prose {
    max-width: 760px; margin: 0 auto; font-size: 15px; line-height: 1.9; color: var(--spectrum-text-primary);
    font-family: var(--spectrum-font-family-serif, Georgia, serif);
  }
  .docview-prose p { margin: 0 0 12px; text-align: justify; }
  .docview-prose h1, .docview-prose h2, .docview-prose h3 { font-weight: 700; line-height: 1.4; margin: 18px 0 10px; font-family: var(--spectrum-font-family-base); }
  .docview-prose table { border-collapse: collapse; margin: 12px 0; font-size: 13.5px; }
  .docview-prose td, .docview-prose th { border: 1px solid var(--spectrum-border-default); padding: 5px 9px; }
  .docview-prose img { max-width: 100%; height: auto; }
  .docview-md {
    margin: 0; padding: 4px 2px; white-space: pre-wrap; word-break: break-word;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12.5px; line-height: 1.7; color: var(--spectrum-text-primary);
  }
  .docview-hit {
    background: color-mix(in srgb, var(--spectrum-yellow-400) 85%, transparent);
    color: var(--spectrum-text-primary); border-radius: 3px; padding: 1px 2px; font-weight: 700;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--spectrum-yellow-700) 55%, transparent);
    scroll-margin: 40vh;
  }

  /* 悬浮窗底部「查看完整文档」按钮 */
  .src-pop-click { cursor: pointer; transition: box-shadow 120ms ease, border-color 120ms ease; }
  .src-pop-click:hover { border-color: var(--spectrum-informative-color); box-shadow: 0 14px 44px var(--spectrum-dropshadow); }
  .src-openhint { align-self: flex-start; display: inline-flex; align-items: center; gap: 5px; color: var(--accent); font-size: 12px; font-weight: 600; }
  .src-openhint svg { width: 13px; height: 13px; }

  /* 目录右侧「管理」按钮 + 管理书稿弹窗 */
  .rail-manage {
    font-family: inherit; font-weight: 600; letter-spacing: 0; text-transform: none; font-size: 12px;
    color: var(--accent); background: transparent; border: none; cursor: pointer;
    padding: 2px 6px; border-radius: var(--spectrum-corner-radius-small);
  }
  .rail-manage:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
  .manage-modal { width: 480px; }
  .manage-list { display: flex; flex-direction: column; gap: 6px; max-height: 52vh; overflow-y: auto; margin-bottom: 18px; }
  .manage-empty { color: var(--spectrum-text-tertiary); font-size: 14px; padding: 16px 0; text-align: center; }
  .manage-row {
    display: flex; align-items: center; gap: 10px; padding: 9px 12px;
    border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium);
    background: var(--spectrum-background-layer-1);
  }
  .manage-name { flex: 1 1 auto; min-width: 0; font-size: 13.5px; font-weight: 600; color: var(--spectrum-text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .manage-meta { flex: 0 0 auto; font-size: 12px; color: var(--spectrum-text-tertiary); }
  .manage-act {
    flex: 0 0 auto; font-size: 12.5px; font-weight: 600; text-decoration: none; cursor: pointer;
    padding: 4px 11px; border-radius: var(--spectrum-corner-radius-medium);
    border: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-base);
    color: var(--spectrum-text-secondary);
  }
  .manage-act:hover { border-color: var(--spectrum-border-strong); color: var(--spectrum-text-primary); }
  .manage-del { color: var(--spectrum-negative-color); }
  .manage-del:hover { background: var(--spectrum-red-100); border-color: var(--spectrum-red-400); }
  .manage-del:disabled { opacity: .5; cursor: not-allowed; }

  /* ── 分屏 PDF（pdf.js 自建查看器：顶部工具条固定高度 + 内容区自滚动）── */
  .docview-pdfwrap { flex: 1 1 auto; min-height: 0; display: flex; flex-direction: column; }
  /* 顶部工具条：固定高度，只含「翻页导航 + 搜索」 */
  .docview-pdfbar {
    flex: 0 0 auto; height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 0 12px; border-bottom: 1px solid var(--spectrum-border-default);
    background: var(--spectrum-background-layer-1); font-size: 12.5px;
  }
  .pdfbar-grp { display: flex; align-items: center; gap: 6px; }
  .pdfbar-find { flex: 1 1 auto; justify-content: flex-end; min-width: 0; }
  .pdfbar-btn {
    flex: 0 0 auto; width: 26px; height: 26px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-base);
    color: var(--spectrum-text-secondary); border-radius: var(--spectrum-corner-radius-small);
    font-size: 15px; line-height: 1; cursor: pointer;
  }
  .pdfbar-btn:hover:not(:disabled) { border-color: var(--spectrum-border-strong); color: var(--spectrum-text-primary); }
  .pdfbar-btn:disabled { opacity: .4; cursor: not-allowed; }
  .pdfbar-page {
    width: 46px; height: 26px; text-align: center; font-size: 12.5px;
    border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-small);
    background: var(--spectrum-background-base); color: var(--spectrum-text-primary);
  }
  .pdfbar-total { flex: 0 0 auto; color: var(--spectrum-text-tertiary); }
  .pdfbar-search {
    flex: 1 1 auto; min-width: 80px; max-width: 240px; height: 26px; padding: 0 9px;
    border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-small);
    background: var(--spectrum-background-base); color: var(--spectrum-text-primary); font-size: 12.5px;
  }
  .pdfbar-count { flex: 0 0 auto; color: var(--spectrum-text-tertiary); white-space: nowrap; min-width: 34px; text-align: right; }
  /* 内容区：相对定位的舞台 + 绝对定位的滚动容器（pdf.js 要求 container 为 absolute） */
  .docview-pdfstage { position: relative; flex: 1 1 auto; min-height: 0; }
  .docview-pdfscroll { position: absolute; inset: 0; overflow: auto; background: var(--spectrum-gray-200); }
  .docview-pdfscroll .pdfViewer { padding: 8px 0; }
  .docview-pdfmsg {
    position: absolute; top: 0; left: 0; right: 0; text-align: center; pointer-events: none;
  }


/* ════════════════════════════════════════════════════════════════════════
   配套资源（教学大纲/教案/题库/AI助教/物料下载/学生端预览）—— 自 Claude Design 设计稿移植
   ════════════════════════════════════════════════════════════════════════ */
/* ── P1: 书卡配套资源状态行 ── */
.book-res {
  margin-top: 12px; padding-top: 11px; border-top: 1px dashed var(--spectrum-border-default);
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  cursor: pointer; border-radius: var(--spectrum-corner-radius-small);
}
.book-res-text { font-size: 12.5px; font-weight: 600; }
.book-res[data-tone="muted"]  .book-res-text { color: var(--spectrum-text-tertiary); }
.book-res[data-tone="amber"]  .book-res-text { color: var(--spectrum-orange-900, #b14c00); }
.book-res[data-tone="blue"]   .book-res-text { color: var(--accent); }
.book-res[data-tone="green"]  .book-res-text { color: var(--spectrum-positive-color); }
.book-res[data-tone="purple"] .book-res-text { color: var(--spectrum-purple-900, #7326d3); }
.book-res-action {
  border: 1px solid var(--accent); background: transparent; color: var(--accent);
  font: inherit; font-size: 12px; font-weight: 600; cursor: pointer;
  padding: 2px 11px; border-radius: var(--spectrum-corner-radius-pill);
  transition: background 120ms ease, color 120ms ease;
}
.book-res-action:hover { background: var(--accent); color: #fff; }
.book-res-go { color: var(--spectrum-text-tertiary); display: inline-flex; }
.book-res-go svg { width: 13px; height: 13px; }
.book-res:hover .book-res-go { color: var(--accent); }

/* ── P2: 平级标签栏 ── */
.restabs {
  flex: 0 0 auto; display: flex; align-items: stretch; gap: 2px;
  padding: 0 24px; background: var(--spectrum-background-base);
  border-bottom: 1px solid var(--spectrum-border-default);
}
.restab {
  position: relative; border: none; background: transparent; font-family: inherit;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 13px 14px; font-size: 14px; color: var(--spectrum-text-secondary);
  cursor: pointer; transition: color 120ms ease;
}
.restab:hover { color: var(--spectrum-text-primary); }
.restab[data-active] { color: var(--spectrum-text-primary); font-weight: 600; }
.restab[data-active]::after {
  content: ''; position: absolute; left: 10px; right: 10px; bottom: 0; height: 2px;
  background: var(--accent); border-radius: 2px 2px 0 0;
}
.restab-badge {
  font-size: 11px; font-variant-numeric: tabular-nums; padding: 0 6px; height: 17px; min-width: 17px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--spectrum-background-layer-2); color: var(--spectrum-text-tertiary);
  border-radius: var(--spectrum-corner-radius-pill);
}
.restab[data-active] .restab-badge { background: var(--accent); color: #fff; }
.restab-dot { width: 7px; height: 7px; border-radius: 50%; flex: 0 0 auto; }
.restab-dot[data-tone="blue"]   { background: var(--accent); }
.restab-dot[data-tone="amber"]  { background: var(--spectrum-orange-700, #e46f00); }
.restab-dot[data-tone="green"]  { background: var(--spectrum-positive-color); }
.restab-dot[data-tone="purple"] { background: var(--spectrum-purple-900, #7326d3); }

/* ── 资源面板滚动容器 ── */
.res-scroll { flex: 1 1 auto; min-height: 0; overflow-y: auto; background: var(--spectrum-background-base); }
.res-panel { max-width: 1000px; margin: 0 auto; padding: 26px 28px 80px; display: flex; flex-direction: column; gap: 18px; }

/* ── 空态 ── */
.res-empty {
  margin: 40px auto; max-width: 480px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.res-empty-icon {
  width: 60px; height: 60px; border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-background-layer-2); color: var(--spectrum-text-secondary);
  display: flex; align-items: center; justify-content: center; margin-bottom: 8px;
}
.res-empty-icon svg { width: 30px; height: 30px; }
.res-empty-title { margin: 0; font-size: 19px; font-weight: 700; color: var(--spectrum-text-primary); }
.res-empty-desc { margin: 2px 0 16px; font-size: 14px; line-height: 1.6; color: var(--spectrum-text-secondary); }
.res-empty-ver { margin-top: 12px; font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.res-sample-note {
  margin-top: 14px; display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; color: var(--spectrum-notice-color);
  background: var(--spectrum-orange-100, #fff1e0); border: 1px solid var(--spectrum-orange-300, #ffc77d);
  padding: 8px 14px; border-radius: var(--spectrum-corner-radius-medium);
}
.res-sample-note svg { width: 14px; height: 14px; flex: 0 0 auto; }

/* ── 题库空态：上传已有题库 / 基于书稿生成 二选一 ── */
.quiz-choice-wrap { margin: 36px auto; max-width: 760px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.quiz-choice { margin-top: 18px; width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.quiz-choice-card {
  display: flex; flex-direction: column; align-items: center; gap: 9px; text-align: center;
  padding: 28px 22px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-gray-50);
  transition: border-color .12s ease, background .12s ease;
}
.quiz-choice-card.is-drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.quiz-choice-ic {
  width: 54px; height: 54px; border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-background-layer-2); color: var(--spectrum-text-secondary);
  display: flex; align-items: center; justify-content: center;
}
.quiz-choice-ic-accent { background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); }
.quiz-choice-ic svg { width: 27px; height: 27px; }
.quiz-choice-title { margin: 2px 0 0; font-size: 16px; font-weight: 700; color: var(--spectrum-text-primary); }
.quiz-choice-desc { margin: 0; min-height: 42px; font-size: 13px; line-height: 1.55; color: var(--spectrum-text-secondary); }
.quiz-choice-chip {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700;
  color: var(--spectrum-positive-color); background: var(--spectrum-green-100);
  padding: 4px 11px; border-radius: var(--spectrum-corner-radius-pill);
}
.quiz-choice-chip svg { width: 12px; height: 12px; }
.quiz-choice-hint { font-size: 11.5px; color: var(--spectrum-text-tertiary); }
@media (max-width: 720px) { .quiz-choice { grid-template-columns: 1fr; } }

/* ── 题库已上传文件 管理视图 ── */
.quiz-files { display: flex; flex-direction: column; gap: 14px; }
.quiz-files-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.quiz-files-title { margin: 0; font-size: 17px; font-weight: 700; color: var(--spectrum-text-primary); }
.quiz-files-sub { margin: 3px 0 0; font-size: 13px; line-height: 1.5; color: var(--spectrum-text-secondary); }
.quiz-files-drop {
  display: flex; flex-direction: column; gap: 8px;
  border: 1px dashed var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  padding: 14px; background: var(--spectrum-gray-50); transition: border-color .12s ease, background .12s ease;
}
.quiz-files-drop.is-drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.quiz-file-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-base);
}
.quiz-file-ext {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: var(--spectrum-corner-radius-medium);
  background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700;
}
.quiz-file-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.quiz-file-name { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.quiz-file-meta { font-size: 12px; color: var(--spectrum-text-tertiary); }
.quiz-file-del {
  flex: 0 0 auto; border: none; background: none; cursor: pointer; padding: 6px;
  color: var(--spectrum-text-tertiary); border-radius: var(--spectrum-corner-radius-medium);
  display: inline-flex; align-items: center; justify-content: center;
}
.quiz-file-del:hover { color: var(--spectrum-negative-color); background: color-mix(in srgb, var(--spectrum-negative-color) 10%, transparent); }
.quiz-files-hint { font-size: 11.5px; color: var(--spectrum-text-tertiary); text-align: center; padding: 4px 0 2px; }

/* ── 生成中 ── */
.res-gen { margin: 60px auto; max-width: 520px; }
.res-gen-inner {
  padding: 26px 24px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-gray-50);
}
.res-gen-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.res-gen-title { font-size: 15px; font-weight: 600; color: var(--spectrum-text-primary); }
.res-gen-pct { font-size: 15px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.res-gen-bar { height: 8px; border-radius: var(--spectrum-corner-radius-pill); background: var(--spectrum-gray-200); overflow: hidden; }
.res-gen-fill { height: 100%; background: var(--accent); border-radius: inherit; transition: width 420ms cubic-bezier(0.45,0,0.40,1); }
.res-gen-note { margin: 14px 0 0; font-size: 13px; color: var(--spectrum-text-tertiary); }

/* ── 勘误处理中：各章真实状态列表 ── */
.audit-chlist { max-width: 520px; margin: 14px auto 0; display: flex; flex-direction: column; gap: 6px; }
.audit-chrow {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 9px 14px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-base);
}
.audit-chlabel { font-size: 13.5px; color: var(--spectrum-text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.audit-chbadge { flex: 0 0 auto; font-size: 11.5px; font-weight: 700; padding: 2px 10px; border-radius: var(--spectrum-corner-radius-pill); }
.audit-chbadge-done { color: var(--spectrum-positive-color); background: var(--spectrum-green-100); }
.audit-chbadge-failed { color: var(--spectrum-negative-color); background: color-mix(in srgb, var(--spectrum-negative-color) 12%, transparent); }
.audit-chbadge-queued, .audit-chbadge-uploading, .audit-chbadge-processing { color: var(--spectrum-text-secondary); background: var(--spectrum-background-layer-2); }

/* ── 版本警示条（§6） ── */
.res-vwarn {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px; border-radius: var(--spectrum-corner-radius-medium);
  background: var(--spectrum-red-100); border: 1px solid var(--spectrum-red-300);
}
.res-vwarn-ic { color: var(--spectrum-negative-color); display: inline-flex; flex: 0 0 auto; }
.res-vwarn-text { flex: 1 1 auto; font-size: 13px; font-weight: 600; color: var(--spectrum-red-1000, #930006); }
.res-vwarn-btn {
  flex: 0 0 auto; border: 1px solid var(--spectrum-negative-color); background: var(--spectrum-negative-color);
  color: #fff; font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer;
  padding: 5px 12px; border-radius: var(--spectrum-corner-radius-pill);
}
.res-vwarn-btn:hover { filter: brightness(0.94); }

/* ── 预览态顶部操作条 ── */
.res-actionbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-background-layer-1);
}
.res-actionbar-left { display: flex; align-items: center; gap: 8px; }
.res-btn-ico { display: inline-flex; align-items: center; gap: 6px; }
.res-btn-ico svg { width: 15px; height: 15px; flex: 0 0 auto; }

/* ── 作者确认状态条 ── */
.res-statusbar {
  display: flex; align-items: center; gap: 11px;
  padding: 12px 16px; border-radius: var(--spectrum-corner-radius-large);
  border: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-layer-1);
}
.res-statusbar-ic { width: 26px; height: 26px; border-radius: 50%; flex: 0 0 auto; display: flex; align-items: center; justify-content: center; color: #fff; }
.res-statusbar-ic { background: var(--spectrum-positive-color); }
.res-statusbar-ic-blue { background: var(--accent); }
.res-statusbar-ic-pub { background: var(--spectrum-purple-900, #7326d3); }
.res-statusbar-text { flex: 1 1 auto; font-size: 13.5px; color: var(--spectrum-text-primary); font-weight: 600; }
.res-statusbar-sub { color: var(--spectrum-text-secondary); font-weight: 400; }
.res-statusbar-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.res-statusbar-sent { background: color-mix(in srgb, var(--accent) 7%, var(--spectrum-background-layer-1)); border-color: color-mix(in srgb, var(--accent) 28%, var(--spectrum-border-default)); }
.res-statusbar-ok { background: var(--spectrum-green-100); border-color: var(--spectrum-green-300, #93e0b6); }
.res-statusbar-pub { background: var(--spectrum-purple-100, #f6ebff); border-color: var(--spectrum-purple-300, #d8b8ff); }
.res-statusbar-pub .res-statusbar-text strong { color: var(--spectrum-purple-900, #7326d3); }

.res-tlink {
  display: inline-flex; align-items: center; gap: 5px;
  border: none; background: transparent; color: var(--accent);
  font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer;
  padding: 4px 8px; border-radius: var(--spectrum-corner-radius-small);
}
.res-tlink:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.res-tlink svg { flex: 0 0 auto; }
.res-subactions { display: flex; align-items: center; gap: 6px; margin-top: -6px; padding-left: 2px; }

/* ── 文档式预览（大纲 / 教案） ── */
.res-doc-wrap {
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50); overflow: hidden;
}
.res-doc { padding: 30px 36px 36px; }
.res-doc-title { font-size: 21px; font-weight: 700; color: var(--spectrum-text-primary); text-align: center; letter-spacing: -0.01em; }
.res-doc-metaline {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px;
  margin-top: 12px; font-size: 13px; color: var(--spectrum-text-secondary);
}
.res-doc-metaline-sub { margin-top: 6px; font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.res-doc-h {
  margin: 26px 0 10px; font-size: 15px; font-weight: 700; color: var(--spectrum-text-primary);
  padding-bottom: 7px; border-bottom: 1px solid var(--spectrum-border-default);
}
.res-doc-p { margin: 0; font-size: 14px; line-height: 1.85; color: var(--spectrum-text-secondary); text-align: justify; text-indent: 2em; }
.res-doc-ol { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 7px; }
.res-doc-ol li { font-size: 14px; line-height: 1.7; color: var(--spectrum-text-secondary); }
.res-doc-hours { display: flex; gap: 12px; flex-wrap: wrap; }
.res-hour-cell {
  flex: 1 1 120px; padding: 14px 16px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-base);
  display: flex; flex-direction: column; gap: 4px;
}
.res-hour-num { font-size: 26px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; line-height: 1; }
.res-hour-lbl { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.res-doc-assess { display: flex; gap: 10px; flex-wrap: wrap; }
.res-assess-chip {
  font-size: 13px; color: var(--spectrum-text-secondary);
  background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default);
  padding: 6px 14px; border-radius: var(--spectrum-corner-radius-pill);
}
.res-assess-chip strong { color: var(--spectrum-text-primary); }
.res-doc-more { margin-top: 6px; font-size: 12.5px; color: var(--spectrum-text-tertiary); text-align: center; font-style: italic; }

/* 表格 */
.res-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.res-table th {
  text-align: left; font-weight: 700; color: var(--spectrum-text-tertiary); font-size: 12px;
  padding: 8px 12px; border-bottom: 2px solid var(--spectrum-border-strong); background: var(--spectrum-background-layer-1);
}
.res-table td { padding: 9px 12px; border-bottom: 1px solid var(--spectrum-border-default); color: var(--spectrum-text-secondary); vertical-align: top; }
.res-td-num { font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--spectrum-text-tertiary); }
.res-td-strong { color: var(--spectrum-text-primary); font-weight: 600; }
.res-td-dim { color: var(--spectrum-text-tertiary); font-size: 13px; }

/* 教案单元 */
.res-lesson-unit { margin-top: 22px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); overflow: hidden; }
.res-lesson-unit-head {
  display: flex; align-items: center; gap: 10px; padding: 11px 16px;
  background: var(--spectrum-background-layer-1); border-bottom: 1px solid var(--spectrum-border-default);
}
.res-lesson-unit-no { font-size: 12px; font-weight: 700; color: var(--accent); }
.res-lesson-unit-title { font-size: 15px; font-weight: 700; color: var(--spectrum-text-primary); flex: 1 1 auto; }
.res-lesson-unit-h { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.res-lesson-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 16px; }
.res-lesson-field { padding: 0 0; }
.res-lesson-k {
  display: block; font-size: 11.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--spectrum-text-tertiary); margin-bottom: 5px;
}
.res-lesson-v { margin: 0; font-size: 13.5px; line-height: 1.65; color: var(--spectrum-text-secondary); }
.res-lesson-ol { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 5px; }
.res-lesson-ol li { font-size: 13.5px; line-height: 1.6; color: var(--spectrum-text-secondary); }
.res-lesson-proc { display: flex; flex-direction: column; gap: 6px; margin: 0 16px 16px; }
.res-proc-row { display: flex; gap: 12px; align-items: baseline; padding: 9px 12px; background: var(--spectrum-background-layer-1); border-radius: var(--spectrum-corner-radius-small); }
.res-proc-phase { flex: 0 0 64px; font-size: 13px; font-weight: 700; color: var(--spectrum-text-primary); }
.res-proc-min { flex: 0 0 36px; font-size: 12.5px; color: var(--accent); font-variant-numeric: tabular-nums; font-weight: 600; }
.res-proc-desc { flex: 1 1 auto; font-size: 13px; line-height: 1.6; color: var(--spectrum-text-secondary); }

/* ── 题库 ── */
.quiz-wrap { display: flex; flex-direction: column; gap: 14px; }
.quiz-stats {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 14px 18px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-background-layer-1);
}
.quiz-stats-total { font-size: 15px; color: var(--spectrum-text-secondary); }
.quiz-stats-total strong { font-size: 20px; color: var(--accent); font-variant-numeric: tabular-nums; }
.quiz-stats-sep { width: 1px; height: 22px; background: var(--spectrum-border-default); }
.quiz-stats-item { font-size: 13.5px; color: var(--spectrum-text-secondary); }
.quiz-stats-item strong { color: var(--spectrum-text-primary); font-variant-numeric: tabular-nums; margin-left: 2px; }
.quiz-list { display: flex; flex-direction: column; gap: 12px; }
.quiz-card {
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50); padding: 16px 18px;
}
.quiz-card-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 11px; }
.quiz-idx { font-family: var(--spectrum-font-family-code); font-size: 13px; font-weight: 700; color: var(--spectrum-text-tertiary); }
.quiz-kp { font-size: 12px; color: var(--spectrum-text-tertiary); }
.quiz-page { font-size: 12px; color: var(--spectrum-text-tertiary); font-variant-numeric: tabular-nums; }
.quiz-card-actions { margin-left: auto; display: flex; gap: 4px; }
.quiz-iconbtn {
  width: 28px; height: 28px; border-radius: var(--spectrum-corner-radius-medium);
  border: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-base);
  color: var(--spectrum-text-tertiary); cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.quiz-iconbtn:hover { background: var(--spectrum-overlay-hover); color: var(--spectrum-text-primary); border-color: var(--spectrum-border-strong); }
.quiz-iconbtn-del:hover { background: var(--spectrum-red-100); color: var(--spectrum-negative-color); border-color: var(--spectrum-red-400); }
.quiz-stem { margin: 0 0 12px; font-size: 14.5px; line-height: 1.65; color: var(--spectrum-text-primary); font-weight: 500; }
.quiz-options { display: flex; flex-direction: column; gap: 7px; margin-bottom: 12px; }
.quiz-opt {
  display: flex; align-items: baseline; gap: 9px; padding: 7px 12px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium);
  font-size: 13.5px; color: var(--spectrum-text-secondary); background: var(--spectrum-background-base);
}
.quiz-opt-letter { font-weight: 700; color: var(--spectrum-text-tertiary); flex: 0 0 auto; }
.quiz-opt-ans { border-color: var(--spectrum-positive-color); background: var(--spectrum-green-100); color: var(--spectrum-text-primary); }
.quiz-opt-ans .quiz-opt-letter { color: var(--spectrum-positive-color); }
.quiz-answer {
  border-top: 1px dashed var(--spectrum-border-default); padding-top: 11px;
  display: flex; flex-direction: column; gap: 8px;
}
.quiz-answer-row { display: flex; gap: 10px; align-items: baseline; }
.quiz-answer-k {
  flex: 0 0 38px; font-size: 11.5px; font-weight: 700; color: var(--spectrum-text-tertiary);
  background: var(--spectrum-background-layer-2); border-radius: var(--spectrum-corner-radius-small);
  padding: 2px 0; text-align: center;
}
.quiz-answer-v { font-size: 14px; font-weight: 700; color: var(--spectrum-positive-color); }
.quiz-analysis { font-size: 13px; line-height: 1.65; color: var(--spectrum-text-secondary); }
.quiz-code {
  margin: 0; font-family: var(--spectrum-font-family-code); font-size: 12.5px; line-height: 1.6;
  background: var(--spectrum-gray-800); color: var(--spectrum-gray-100); padding: 12px 14px;
  border-radius: var(--spectrum-corner-radius-medium); overflow-x: auto; white-space: pre; flex: 1 1 auto;
}

/* ── 发送确认弹框 ── */
.res-send-modal { width: 480px; }
.res-send-field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }
.res-send-label { font-size: 12px; font-weight: 700; letter-spacing: 0.03em; text-transform: uppercase; color: var(--spectrum-text-tertiary); }
.res-send-author { display: flex; align-items: center; gap: 11px; padding: 11px 14px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-layer-1); }
.res-send-ava { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; flex: 0 0 auto; }
.res-send-author-meta { display: flex; flex-direction: column; gap: 2px; }
.res-send-author-name { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); }
.res-send-author-title { font-size: 12px; font-weight: 400; color: var(--spectrum-text-tertiary); margin-left: 4px; }
.res-send-author-sub { font-size: 12px; color: var(--spectrum-text-tertiary); }
.res-send-scope { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); padding: 10px 14px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-layer-1); }
.res-send-link { display: flex; align-items: center; gap: 10px; padding: 9px 9px 9px 14px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-base); }
.res-send-link-url { flex: 1 1 auto; min-width: 0; font-family: var(--spectrum-font-family-code); font-size: 12px; color: var(--spectrum-text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.res-send-preview { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--spectrum-border-strong); background: var(--spectrum-background-base); color: var(--spectrum-text-primary); font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer; padding: 5px 11px; border-radius: var(--spectrum-corner-radius-pill); }
.res-send-preview:hover { background: var(--spectrum-overlay-hover); border-color: var(--accent); color: var(--accent); }

.res-input {
  width: 100%; box-sizing: border-box; height: 34px; font: inherit; font-size: 14px;
  border: 1px solid var(--spectrum-border-strong); border-radius: var(--spectrum-corner-radius-medium);
  padding: 0 11px; color: var(--spectrum-text-primary); background: var(--spectrum-background-base);
}
.res-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.res-textarea { height: 64px; padding: 8px 11px; resize: vertical; }
.res-deliver-items { display: flex; flex-direction: column; gap: 8px; }
.res-deliver-item {
  display: flex; align-items: center; gap: 11px; padding: 10px 14px; cursor: pointer;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium);
  background: var(--spectrum-background-base); font: inherit; text-align: left;
}
.res-deliver-item[data-on] { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 5%, var(--spectrum-background-base)); }
.res-deliver-check {
  width: 20px; height: 20px; border-radius: var(--spectrum-corner-radius-small); flex: 0 0 auto;
  border: 1.5px solid var(--spectrum-border-strong); display: flex; align-items: center; justify-content: center; color: #fff;
}
.res-deliver-item[data-on] .res-deliver-check { background: var(--accent); border-color: var(--accent); }
.res-deliver-label { flex: 1 1 auto; font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); }
.res-deliver-price { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.res-deliver-sum { font-size: 22px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.res-deliver-sum-unit { font-size: 13px; font-weight: 400; color: var(--spectrum-text-tertiary); }

/* ── P5: 挂码交付 ── */
.res-delivery { display: flex; flex-direction: column; gap: 18px; }
.res-delivery-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.dl-card {
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50); padding: 20px; display: flex; flex-direction: column; gap: 14px;
}
.dl-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.dl-card-head h3 { margin: 0; font-size: 15px; font-weight: 700; color: var(--spectrum-text-primary); }
.dl-card-note { font-size: 11.5px; color: var(--spectrum-text-tertiary); }
.dl-qr-box { align-self: center; padding: 14px; background: #fff; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); }
.qr-grid { display: grid; width: 188px; height: 188px; gap: 0; }
.qr-cell { background: transparent; }
.qr-cell.on { background: #16181d; }
.dl-qr-note { margin: 0; font-size: 12.5px; line-height: 1.6; color: var(--spectrum-text-secondary); text-align: center; }
.dl-qr-dl { display: flex; gap: 8px; justify-content: center; }

/* student landing phone shell */
.dl-phone { align-self: center; width: 224px; border: 8px solid var(--spectrum-gray-800); border-radius: 28px; overflow: hidden; background: var(--spectrum-gray-800); box-shadow: 0 8px 24px var(--spectrum-dropshadow); }
.dl-phone-screen { background: var(--spectrum-background-base); min-height: 360px; display: flex; flex-direction: column; }
.dl-phone-top { padding: 22px 16px 16px; background: var(--accent); color: #fff; }
.dl-phone-book { font-size: 14px; font-weight: 700; line-height: 1.35; }
.dl-phone-sub { font-size: 11px; opacity: 0.85; margin-top: 4px; }
.dl-phone-list { padding: 12px; display: flex; flex-direction: column; gap: 9px; }
.dl-phone-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 13px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-gray-50); }
.dl-phone-item-label { font-size: 13px; font-weight: 600; color: var(--spectrum-text-primary); }
.dl-phone-tag { font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: var(--spectrum-corner-radius-pill); }
.dl-phone-tag.free { color: var(--spectrum-positive-color); background: var(--spectrum-green-100); }
.dl-phone-tag.paid { color: var(--spectrum-orange-900, #b14c00); background: var(--spectrum-orange-100, #fff1e0); }

.dl-register {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-background-layer-1);
}
.dl-register-text h3 { margin: 0 0 4px; font-size: 15px; font-weight: 700; color: var(--spectrum-text-primary); }
.dl-register-text p { margin: 0; font-size: 13px; color: var(--spectrum-text-tertiary); line-height: 1.55; }

/* 资源面板响应式 */
@media (max-width: 860px) {
  .res-delivery-grid { grid-template-columns: 1fr; }
  .res-lesson-grid { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════════════════════════════════
   计费（空态价签 + 首次计费说明弹窗）/ 物料下载 / AI 助教 / 学生端预览
   ════════════════════════════════════════════════════════════════════════ */

/* ── 空态价签 ── */
.res-price-chip {
  display: inline-flex; align-items: center; gap: 9px; margin: 6px 0 16px;
  padding: 7px 8px 7px 14px; border-radius: var(--spectrum-corner-radius-pill);
  background: var(--spectrum-background-layer-1); border: 1px solid var(--spectrum-border-default);
}
.res-price-now { font-size: 14px; font-weight: 700; color: var(--spectrum-text-primary); }
.res-price-bundle { font-size: 12px; color: var(--spectrum-text-tertiary); }
.res-price-chip[data-free] { background: var(--spectrum-green-100); border-color: var(--spectrum-green-300, #93e0b6); }
.res-price-free { font-size: 13px; font-weight: 700; color: var(--spectrum-positive-color); }
.res-price-strike { font-size: 12px; color: var(--spectrum-text-tertiary); text-decoration: line-through; }
.res-price-link {
  border: none; background: var(--spectrum-background-base); color: var(--accent);
  font: inherit; font-size: 12px; font-weight: 600; cursor: pointer;
  padding: 3px 10px; border-radius: var(--spectrum-corner-radius-pill);
}
.res-price-link:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* ── 计费说明弹窗 ── */
.res-pricing-modal { width: 460px; }
.res-pricing-head { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 18px; }
.res-pricing-ic { flex: 0 0 auto; width: 38px; height: 38px; border-radius: var(--spectrum-corner-radius-medium); background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.res-pricing-rows { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.res-pricing-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 13px 16px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-background-layer-1);
}
.res-pricing-name { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); display: flex; align-items: center; gap: 8px; }
.res-pricing-tag { font-size: 10.5px; font-weight: 700; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); padding: 1px 7px; border-radius: var(--spectrum-corner-radius-pill); }
.res-pricing-price { font-size: 18px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.res-pricing-price span { font-size: 12px; font-weight: 400; color: var(--spectrum-text-tertiary); }
.res-pricing-notes { margin: 0 0 14px; padding-left: 20px; display: flex; flex-direction: column; gap: 7px; }
.res-pricing-notes li { font-size: 13px; line-height: 1.6; color: var(--spectrum-text-secondary); }
.res-pricing-notes strong { color: var(--spectrum-text-primary); font-weight: 700; }
.res-pricing-free-banner {
  display: flex; align-items: center; gap: 8px; margin-bottom: 18px;
  font-size: 13px; font-weight: 600; color: var(--spectrum-positive-color);
  background: var(--spectrum-green-100); border: 1px solid var(--spectrum-green-300, #93e0b6);
  border-radius: var(--spectrum-corner-radius-medium); padding: 10px 14px;
}
.res-pricing-free-banner svg { width: 15px; height: 15px; flex: 0 0 auto; }
.res-pricing-free-banner strong { font-weight: 700; }

/* ── 物料下载 ── */
.mat { display: flex; flex-direction: column; gap: 22px; }
.mat-block { display: flex; flex-direction: column; gap: 14px; }
.mat-block-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.mat-block-head h3 { margin: 0; font-size: 16px; font-weight: 700; color: var(--spectrum-text-primary); }
.mat-block-sub { font-size: 12.5px; color: var(--spectrum-text-tertiary); flex: 1 1 auto; }
.mat-files { display: flex; flex-direction: column; gap: 10px; }
.mat-file {
  display: flex; align-items: center; gap: 14px; padding: 13px 16px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50);
}
.mat-file[data-ready] { background: var(--spectrum-background-base); }
.mat-file-ext {
  flex: 0 0 auto; width: 44px; height: 48px; border-radius: var(--spectrum-corner-radius-small);
  background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--spectrum-font-family-code); font-size: 11px; font-weight: 700; color: var(--spectrum-text-secondary);
}
.mat-file[data-ready] .mat-file-ext { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--spectrum-border-default)); }
.mat-file-main { flex: 1 1 auto; min-width: 0; }
.mat-file-name { display: block; font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mat-file-meta { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.mat-file-lock { flex: 0 0 auto; font-size: 12.5px; font-weight: 600; color: var(--spectrum-text-tertiary); background: var(--spectrum-gray-200); padding: 5px 12px; border-radius: var(--spectrum-corner-radius-pill); }

.mat-qr-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 12px; }
.mat-qr-card {
  display: flex; flex-direction: column; align-items: center; gap: 9px; padding: 14px 12px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50);
}
.mat-qr-card-all { border-color: color-mix(in srgb, var(--accent) 40%, var(--spectrum-border-default)); background: color-mix(in srgb, var(--accent) 4%, var(--spectrum-gray-50)); }
.mat-qr-thumb { padding: 8px; background: #fff; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); }
.mat-qr-thumb .qr-grid { width: 92px; height: 92px; }
.mat-qr-label { font-size: 12.5px; font-weight: 700; color: var(--spectrum-text-primary); text-align: center; line-height: 1.3; }
.mat-qr-label span { display: block; font-size: 11px; font-weight: 400; color: var(--spectrum-text-tertiary); margin-top: 2px; }
.mat-qr-dl {
  display: inline-flex; align-items: center; gap: 5px; border: none; background: transparent; color: var(--accent);
  font: inherit; font-size: 12px; font-weight: 600; cursor: pointer; padding: 3px 8px; border-radius: var(--spectrum-corner-radius-small);
}
.mat-qr-dl:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.mat-qr-dl svg { width: 13px; height: 13px; }

.mat-code-bar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 14px 16px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-background-layer-1);
}
.mat-code-label { font-size: 13px; font-weight: 600; color: var(--spectrum-text-secondary); }
.mat-code-qty { display: flex; gap: 6px; }
.mat-qty-btn {
  border: 1px solid var(--spectrum-border-strong); background: var(--spectrum-background-base);
  color: var(--spectrum-text-secondary); font: inherit; font-size: 13px; font-weight: 600;
  padding: 6px 14px; border-radius: var(--spectrum-corner-radius-pill); cursor: pointer; font-variant-numeric: tabular-nums;
}
.mat-qty-btn[data-on] { background: var(--accent); border-color: var(--accent); color: #fff; }
.mat-code-result { border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-gray-50); padding: 14px 16px; }
.mat-code-result-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 11px; font-size: 13px; color: var(--spectrum-text-secondary); }
.mat-code-result-head strong { color: var(--accent); font-variant-numeric: tabular-nums; }
.mat-code-result-actions { display: flex; gap: 6px; }
.mat-code-list { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.mat-code-chip { font-family: var(--spectrum-font-family-code); font-size: 12.5px; font-weight: 600; color: var(--spectrum-text-primary); background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default); padding: 5px 10px; border-radius: var(--spectrum-corner-radius-small); }
.mat-code-more { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.mat-code-empty { font-size: 13px; color: var(--spectrum-text-tertiary); padding: 14px 16px; border: 1px dashed var(--spectrum-border-strong); border-radius: var(--spectrum-corner-radius-large); text-align: center; }
.mat-code-pdf { display: flex; align-items: center; gap: 14px; margin-top: 12px; padding: 13px 16px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-background-base); }
.mat-code-pdf-ic { flex: 0 0 auto; width: 40px; height: 46px; border-radius: var(--spectrum-corner-radius-small); background: color-mix(in srgb, var(--spectrum-red-700, #d31510) 9%, transparent); color: var(--spectrum-red-900, #b40000); border: 1px solid color-mix(in srgb, var(--spectrum-red-700, #d31510) 28%, var(--spectrum-border-default)); display: flex; align-items: center; justify-content: center; font-family: var(--spectrum-font-family-code); font-size: 11px; font-weight: 700; }
.mat-code-pdf-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.mat-code-pdf-name { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mat-code-pdf-meta { font-size: 12px; color: var(--spectrum-notice-color); }
.mat-code-pdf-dl { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 6px; height: 32px; padding: 0 16px; border-radius: var(--spectrum-corner-radius-medium); background: var(--accent); color: #fff; font-size: 13px; font-weight: 600; text-decoration: none; cursor: pointer; transition: background 120ms ease; white-space: nowrap; }
.mat-code-pdf-dl:hover { background: color-mix(in srgb, var(--accent) 88%, black); }

/* ── 学生端预览 ── */
.prev { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.prev-intro { text-align: center; max-width: 420px; }
.prev-intro h3 { margin: 0 0 5px; font-size: 16px; font-weight: 700; color: var(--spectrum-text-primary); }
.prev-intro p { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--spectrum-text-secondary); }
.prev-note { color: var(--spectrum-text-tertiary); }
.prev-phone { width: 280px; border: 9px solid var(--spectrum-gray-800); border-radius: 34px; overflow: hidden; background: var(--spectrum-gray-800); box-shadow: 0 16px 40px -16px var(--spectrum-dropshadow); }
.prev-phone-screen { background: var(--spectrum-background-base); display: flex; flex-direction: column; }
.prev-phone-top { padding: 26px 18px 18px; background: var(--accent); color: #fff; }
.prev-phone-book { font-size: 16px; font-weight: 700; line-height: 1.35; }
.prev-phone-sub { font-size: 12px; opacity: .85; margin-top: 5px; }
.prev-phone-list { padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.prev-phone-item { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 13px 14px; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); background: var(--spectrum-gray-50); }
.prev-phone-item-main { display: flex; flex-direction: column; gap: 2px; }
.prev-phone-item-label { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); }
.prev-phone-item-desc { font-size: 11.5px; color: var(--spectrum-text-tertiary); }
.dl-phone-tag { font-size: 10.5px; font-weight: 700; padding: 3px 9px; border-radius: var(--spectrum-corner-radius-pill); flex: 0 0 auto; }
.dl-phone-tag.free { color: var(--spectrum-positive-color); background: var(--spectrum-green-100); }
.dl-phone-tag.paid { color: var(--spectrum-orange-900, #b14c00); background: var(--spectrum-orange-100, #fff1e0); }

/* ── AI 助教 ── */
.ai { display: flex; flex-direction: column; gap: 18px; }
.ai-cta {
  text-align: center; display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 30px 24px; border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-gray-50);
}
.ai-cta-ic { width: 58px; height: 58px; border-radius: var(--spectrum-corner-radius-large); background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 4px; }
.ai-cta-ic svg { width: 30px; height: 30px; }
.ai-cta-title { margin: 0; font-size: 19px; font-weight: 700; color: var(--spectrum-text-primary); }
.ai-cta-desc { margin: 0; max-width: 460px; font-size: 14px; line-height: 1.65; color: var(--spectrum-text-secondary); }
.ai-cta-desc strong { color: var(--spectrum-positive-color); font-weight: 700; }
.ai-free-chip { display: inline-flex; align-items: center; gap: 5px; margin: 6px 0 12px; font-size: 12.5px; font-weight: 700; color: var(--spectrum-positive-color); background: var(--spectrum-green-100); padding: 5px 12px; border-radius: var(--spectrum-corner-radius-pill); }
.ai-free-chip svg { width: 13px; height: 13px; }

.ai-preview { position: relative; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large); background: var(--spectrum-gray-50); overflow: hidden; }
.ai-preview-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 13px 18px; border-bottom: 1px solid var(--spectrum-border-default); background: var(--spectrum-background-layer-1); }
.ai-preview-title { font-size: 13px; font-weight: 700; color: var(--spectrum-text-primary); }
.ai-preview-badge { font-size: 11px; font-weight: 700; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); padding: 2px 9px; border-radius: var(--spectrum-corner-radius-pill); }
.ai-chat { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.ai-msg { display: flex; gap: 9px; max-width: 82%; }
.ai-msg-student { align-self: flex-end; flex-direction: row-reverse; }
.ai-msg-ai { align-self: flex-start; }
.ai-avatar { flex: 0 0 auto; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }
.ai-bubble { padding: 11px 14px; border-radius: 14px; }
.ai-msg-student .ai-bubble { background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.ai-msg-ai .ai-bubble { background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default); border-bottom-left-radius: 4px; }
.ai-bubble-text { margin: 0; font-size: 13.5px; line-height: 1.6; }
.ai-msg-ai .ai-bubble-text { color: var(--spectrum-text-primary); }
.ai-cite { display: inline-block; margin-top: 7px; font-size: 11px; font-weight: 600; color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); padding: 2px 8px; border-radius: var(--spectrum-corner-radius-pill); }
.ai-inputbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 4px; padding: 10px 14px; border: 1px solid var(--spectrum-border-strong); border-radius: var(--spectrum-corner-radius-pill); background: var(--spectrum-background-base); }
.ai-input-ph { font-size: 13px; color: var(--spectrum-text-tertiary); }
.ai-input-send { font-size: 13px; font-weight: 700; color: var(--accent); }
.ai-preview[data-active] { border-color: color-mix(in srgb, var(--spectrum-positive-color) 40%, var(--spectrum-border-default)); }
.ai-preview-veil { position: absolute; inset: 46px 0 0; background: color-mix(in srgb, var(--spectrum-gray-50) 62%, transparent); backdrop-filter: blur(1.5px); display: flex; align-items: center; justify-content: center; }
.ai-preview-veil span { font-size: 13px; font-weight: 700; color: var(--spectrum-text-secondary); background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default); padding: 8px 16px; border-radius: var(--spectrum-corner-radius-pill); box-shadow: 0 4px 14px var(--spectrum-dropshadow); }

@media (max-width: 700px) {
  .ai-msg { max-width: 92%; }
}

/* ── 标签不换行 ── */
.restab { white-space: nowrap; }

/* ── 物料下载：手填数量 + 单枚章节二维码 ── */
.mat-code-input {
  width: 120px; height: 34px; box-sizing: border-box; font: inherit; font-size: 14px;
  font-variant-numeric: tabular-nums; border: 1px solid var(--spectrum-border-strong);
  border-radius: var(--spectrum-corner-radius-medium); padding: 0 11px;
  color: var(--spectrum-text-primary); background: var(--spectrum-background-base);
}
.mat-code-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.mat-code-unit { font-size: 13px; color: var(--spectrum-text-tertiary); margin-left: -6px; }

.mat-qr-single {
  display: flex; gap: 18px; align-items: stretch; padding: 16px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50);
}
.mat-qr-single-thumb { flex: 0 0 auto; align-self: center; padding: 10px; background: #fff; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); }
.mat-qr-single-thumb .qr-grid { width: 112px; height: 112px; }
.mat-qr-single-main { flex: 1 1 auto; display: flex; flex-direction: column; justify-content: center; gap: 12px; min-width: 0; }
.mat-qr-single-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.mat-qr-single-hint { font-size: 12.5px; color: var(--spectrum-text-tertiary); }
.mat-qr-single-divider { height: 1px; background: var(--spectrum-border-default); }
.mat-ch-select { position: relative; }
.mat-ch-select select {
  height: 34px; font: inherit; font-size: 13.5px; border: 1px solid var(--spectrum-border-strong);
  border-radius: var(--spectrum-corner-radius-medium); padding: 0 30px 0 11px;
  background: var(--spectrum-background-base); color: var(--spectrum-text-primary); cursor: pointer;
  -webkit-appearance: none; appearance: none; max-width: 260px;
}
.mat-ch-select::after { content: '▾'; position: absolute; right: 11px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--spectrum-text-tertiary); font-size: 11px; }
.mat-ch-select select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

/* 章节练习二维码：横排两卡片（仅下载，无二维码图） */
.mat-qr-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mat-qr-dlcard {
  display: flex; align-items: center; gap: 14px; padding: 16px;
  border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-large);
  background: var(--spectrum-gray-50);
}
.mat-qr-dlcard-ic { flex: 0 0 auto; width: 44px; height: 44px; border-radius: var(--spectrum-corner-radius-medium); background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.mat-qr-dlcard-ic svg { width: 23px; height: 23px; }
.mat-qr-dlcard-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.mat-qr-dlcard-title { font-size: 14px; font-weight: 600; color: var(--spectrum-text-primary); }
.mat-qr-dlcard-desc { font-size: 12.5px; line-height: 1.5; color: var(--spectrum-text-tertiary); }
@media (max-width: 720px) { .mat-qr-cards { grid-template-columns: 1fr; } }

/* ── 学生端预览：悬浮二维码 + 开通标记 ── */
.prev-stage { position: relative; display: flex; justify-content: center; width: 100%; padding-top: 8px; }
.prev-qr-float {
  position: absolute; top: 0; right: max(8px, calc(50% - 248px)); width: 196px;
  background: var(--spectrum-background-base); border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large); box-shadow: 0 16px 40px -16px var(--spectrum-dropshadow);
  padding: 14px; display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center;
}
.prev-qr-float-thumb { padding: 8px; background: #fff; border: 1px solid var(--spectrum-border-default); border-radius: var(--spectrum-corner-radius-medium); }
.prev-qr-float-thumb .qr-grid { width: 118px; height: 118px; }
.prev-qr-float-text strong { display: block; font-size: 14px; font-weight: 700; color: var(--spectrum-text-primary); }
.prev-qr-float-text span { display: block; margin-top: 3px; font-size: 11.5px; line-height: 1.5; color: var(--spectrum-text-tertiary); }
.prev-on-badge { display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: var(--spectrum-corner-radius-pill); flex: 0 0 auto; }
.prev-on-badge svg { width: 12px; height: 12px; }
.prev-on-badge .res-btn-ico { gap: 4px; }
.prev-on-badge.on { color: var(--spectrum-positive-color); background: var(--spectrum-green-100); }
.prev-on-badge.off { color: var(--spectrum-text-tertiary); background: var(--spectrum-gray-200); }

@media (max-width: 780px) {
  .prev-stage { flex-direction: column; align-items: center; gap: 16px; }
  .prev-qr-float { position: static; width: 100%; max-width: 300px; flex-direction: row; text-align: left; gap: 14px; }
  .prev-qr-float-thumb { flex: 0 0 auto; }
}

/* ── 上传页：自动勘误开关 ── */
.up-autoaudit {
  display: flex; flex-direction: column; gap: 7px; margin: 2px 0 18px;
  padding: 14px 16px; background: var(--spectrum-gray-50);
  border: 1px solid var(--spectrum-border-default);
  border-radius: var(--spectrum-corner-radius-large);
}
.up-autoaudit-hint { font-size: 12.5px; line-height: 1.6; color: var(--spectrum-text-tertiary); padding-left: 2px; }

/* ── 登录/注册 切换链接 ── */
.auth-switch {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px solid var(--spectrum-border-default);
  font-size: 13px; color: var(--spectrum-text-tertiary); text-align: center;
}
.auth-switch .auth-link { margin-left: 4px; }