/* 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 { white-space: nowrap; }
  .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: toast-in 160ms cubic-bezier(0.45,0,0.40,1);
  }
  .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; }