/* ==========================================================================
   组合图形面积割补练习 /tool/polyarea-split-drill
   视觉主题：几何作图台 —— 海军蓝 #1c3d6e + 芥末黄 #d9a520 + 宣纸白
   （独立色系，与站内其它工具页完全错开；深浅双主题跟随导航栏 #themeToggle）
   ========================================================================== */

.pas-page {
    --pas-bg: #eef1f6;
    --pas-paper: #ffffff;
    --pas-paper-2: #f7f8fb;
    --pas-paper-3: #e9edf4;
    --pas-ink: #16233b;
    --pas-ink-2: #455574;
    --pas-ink-3: #7c8aa6;
    --pas-line: #dbe1ec;
    --pas-line-2: #bcc6d8;
    --pas-blue: #1c3d6e;
    --pas-blue-2: #142d52;
    --pas-blue-soft: #e3eaf5;
    --pas-yellow: #b9890f;
    --pas-yellow-2: #d9a520;
    --pas-yellow-soft: #fbf1d6;
    --pas-red: #c2453c;
    --pas-red-soft: #fbe9e7;
    --pas-green: #2c7d5b;
    --pas-green-soft: #e2f2ea;
    --pas-shadow: 0 14px 36px rgba(20, 40, 70, .13);
    --pas-shadow-sm: 0 3px 12px rgba(20, 40, 70, .08);
    --pas-radius: 16px;
}

:root[data-theme="dark"] .pas-page {
    --pas-bg: #0e1622;
    --pas-paper: #141d2b;
    --pas-paper-2: #1a2434;
    --pas-paper-3: #212d40;
    --pas-ink: #e8eef7;
    --pas-ink-2: #aebbd1;
    --pas-ink-3: #7b8aa4;
    --pas-line: #243044;
    --pas-line-2: #34425c;
    --pas-blue: #7ba6e0;
    --pas-blue-2: #9dbcea;
    --pas-blue-soft: #182740;
    --pas-yellow: #e5bb48;
    --pas-yellow-2: #f2cf6d;
    --pas-yellow-soft: #33290f;
    --pas-red: #f0837a;
    --pas-red-soft: #3a1f1d;
    --pas-green: #5cc294;
    --pas-green-soft: #16352a;
    --pas-shadow: 0 14px 36px rgba(0, 0, 0, .45);
    --pas-shadow-sm: 0 3px 12px rgba(0, 0, 0, .35);
}

.pas-page {
    color: var(--pas-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    font-variant-numeric: tabular-nums;
    padding-bottom: 48px;
}

.pas-page * { box-sizing: border-box; }
.pas-page h1, .pas-page h2, .pas-page h3 { font-family: "Songti SC", "SimSun", "PingFang SC", serif; margin: 0; letter-spacing: .4px; }
.pas-num { font-family: "Consolas", "Monaco", "DejaVu Sans Mono", monospace; letter-spacing: -.5px; }

/* ===================== 首屏 ===================== */
.pas-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--pas-paper-2), var(--pas-paper));
    border: 1px solid var(--pas-line);
    border-radius: 20px;
    box-shadow: var(--pas-shadow);
    padding: 30px 30px 24px;
    margin-bottom: 20px;
}

/* 顶部蓝图网格 */
.pas-hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 18px;
    background:
        repeating-linear-gradient(0deg, var(--pas-line-2) 0 1px, transparent 1px 12px),
        repeating-linear-gradient(90deg, var(--pas-line-2) 0 1px, transparent 1px 12px),
        var(--pas-blue-soft);
    opacity: .75;
}

.pas-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 26px; align-items: start; padding-top: 16px; }

.pas-kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    font-weight: 800;
    color: var(--pas-blue);
    border: 1px solid var(--pas-blue);
    background: var(--pas-blue-soft);
    border-radius: 999px;
    padding: 3px 14px;
    margin-bottom: 12px;
}

.pas-hero-copy h1 { font-size: 33px; line-height: 1.26; color: var(--pas-blue-2); margin-bottom: 10px; }
.pas-lead { margin: 0 0 14px; font-size: 15px; color: var(--pas-ink-2); max-width: 64ch; line-height: 1.9; }
.pas-lead b { color: var(--pas-ink); font-weight: 700; }

.pas-tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.pas-tags li {
    font-size: 12.5px; color: var(--pas-ink-2); background: var(--pas-paper-3);
    border: 1px solid var(--pas-line); border-radius: 999px; padding: 4px 12px; font-weight: 700;
}

.pas-start { background: var(--pas-paper); border: 1px solid var(--pas-line-2); border-radius: 14px; box-shadow: var(--pas-shadow-sm); overflow: hidden; }
.pas-start-head { background: linear-gradient(135deg, var(--pas-blue), var(--pas-blue-2)); color: #fff; font-size: 13px; font-weight: 800; letter-spacing: 2px; padding: 9px 14px; }
:root[data-theme="dark"] .pas-start-head { color: #061019; }
.pas-start-body { padding: 14px; }

.pas-field { display: block; margin-bottom: 12px; }
.pas-label { display: block; font-size: 12px; font-weight: 800; color: var(--pas-ink-3); letter-spacing: .4px; margin-bottom: 6px; }

.pas-input, .pas-select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--pas-line-2); border-radius: 10px;
    background: var(--pas-paper-2); color: var(--pas-ink); font-size: 14px; font-family: inherit; transition: border-color .16s, box-shadow .16s;
}
.pas-input:focus, .pas-select:focus { outline: none; border-color: var(--pas-blue); box-shadow: 0 0 0 3px var(--pas-blue-soft); }

.pas-start-btn {
    width: 100%; margin-top: 4px; border: none; border-radius: 12px; padding: 13px 18px;
    font-size: 15px; font-weight: 800; font-family: inherit; cursor: pointer; color: #fff;
    background: linear-gradient(135deg, var(--pas-blue), var(--pas-blue-2));
    box-shadow: 0 8px 20px rgba(28, 61, 110, .28); transition: transform .14s, box-shadow .18s;
}
:root[data-theme="dark"] .pas-start-btn { color: #061019; }
.pas-start-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(28, 61, 110, .34); }
.pas-start-note { margin: 10px 0 0; font-size: 11.5px; color: var(--pas-ink-3); line-height: 1.7; text-align: center; }

/* ===================== 面板 ===================== */
.pas-panel { background: var(--pas-paper); border: 1px solid var(--pas-line); border-radius: var(--pas-radius); box-shadow: var(--pas-shadow-sm); margin-bottom: 20px; overflow: hidden; }
.pas-panel-head { padding: 15px 22px 13px; border-bottom: 1px solid var(--pas-line); background: var(--pas-paper-2); }
.pas-panel-kicker { display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: 2px; color: var(--pas-yellow); margin-bottom: 4px; }
.pas-panel-head h2 { font-size: 19px; color: var(--pas-ink); margin-bottom: 4px; }
.pas-panel-head p { margin: 0; font-size: 13px; color: var(--pas-ink-3); line-height: 1.8; }
.pas-panel-body { padding: 18px 22px 22px; }

.pas-setup { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; }
.pas-chip-group { display: flex; flex-wrap: wrap; gap: 7px; }
.pas-chip {
    border: 1px solid var(--pas-line-2); background: var(--pas-paper-2); color: var(--pas-ink-2);
    padding: 7px 14px; border-radius: 999px; font-size: 13.5px; font-weight: 700; font-family: inherit; cursor: pointer; transition: .16s; white-space: nowrap;
}
.pas-chip:hover { border-color: var(--pas-blue); color: var(--pas-blue); }
.pas-chip.active { background: var(--pas-blue); border-color: var(--pas-blue); color: #fff; box-shadow: 0 4px 12px rgba(28, 61, 110, .22); }
:root[data-theme="dark"] .pas-chip.active { color: #061019; }
.pas-chip.yel.active { background: var(--pas-yellow); border-color: var(--pas-yellow); box-shadow: 0 4px 12px rgba(185, 137, 15, .24); }
.pas-chip.yel:hover { border-color: var(--pas-yellow); color: var(--pas-yellow); }
:root[data-theme="dark"] .pas-chip.yel.active { color: #241a04; }

/* ===================== 练习区 ===================== */
.pas-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 20px; align-items: start; }

.pas-quiz { background: var(--pas-paper); border: 1px solid var(--pas-line); border-radius: var(--pas-radius); box-shadow: var(--pas-shadow); overflow: hidden; }

.pas-quiz-bar {
    display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
    padding: 12px 20px; background: var(--pas-paper-2); border-bottom: 1px solid var(--pas-line);
}
.pas-progress { flex: 1 1 160px; height: 8px; border-radius: 999px; background: var(--pas-paper-3); border: 1px solid var(--pas-line); overflow: hidden; min-width: 120px; }
.pas-progress i { display: block; height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--pas-blue), var(--pas-yellow)); transition: width .3s ease; }
.pas-quiz-stat { font-size: 12.5px; color: var(--pas-ink-3); font-weight: 700; white-space: nowrap; }
.pas-quiz-stat b { color: var(--pas-ink); font-size: 15px; font-weight: 800; }
.pas-quiz-stat.score b { color: var(--pas-blue); }
.pas-quiz-stat.wrong b { color: var(--pas-red); }

/* 图形区 */
.pas-figure-wrap { padding: 20px 22px 8px; display: flex; flex-direction: column; align-items: center; }
.pas-figure {
    width: 100%; max-width: 480px; background: var(--pas-paper-2);
    border: 1px solid var(--pas-line); border-radius: 14px; padding: 6px;
}
.pas-figure svg { display: block; width: 100%; height: auto; }
.pas-figure-note { margin: 10px 0 0; font-size: 12.5px; color: var(--pas-ink-3); text-align: center; line-height: 1.8; }

.pas-question { padding: 12px 24px 18px; text-align: center; border-bottom: 1px dashed var(--pas-line); }
.pas-qtag { display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: 1px; color: var(--pas-yellow); background: var(--pas-yellow-soft); border-radius: 999px; padding: 3px 12px; margin-bottom: 10px; }
.pas-qtext { font-size: 17.5px; color: var(--pas-ink-2); line-height: 1.9; margin: 0 0 12px; }
.pas-qtext b { color: var(--pas-ink); }
.pas-shape-desc { display: inline-block; font-size: 13px; color: var(--pas-ink-2); background: var(--pas-paper-3); border: 1px solid var(--pas-line); border-radius: 10px; padding: 7px 14px; line-height: 1.8; }

/* 作答区 */
.pas-answer { padding: 18px 24px 22px; background: var(--pas-paper-2); }
.pas-answer-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; justify-content: center; }
.pas-answer-field { flex: 0 1 200px; min-width: 150px; }
.pas-answer-field .pas-input { font-size: 20px; font-weight: 800; text-align: center; padding: 11px 12px; font-family: "Consolas", "Monaco", monospace; }

.pas-btn {
    border: 1px solid var(--pas-line-2); background: var(--pas-paper); color: var(--pas-ink);
    padding: 11px 20px; border-radius: 11px; font-size: 14px; font-weight: 700; font-family: inherit; cursor: pointer;
    transition: transform .14s, border-color .16s;
}
.pas-btn:hover { transform: translateY(-1px); border-color: var(--pas-blue); }
.pas-btn--primary { background: linear-gradient(135deg, var(--pas-blue), var(--pas-blue-2)); border-color: var(--pas-blue-2); color: #fff; box-shadow: 0 6px 18px rgba(28, 61, 110, .26); }
:root[data-theme="dark"] .pas-btn--primary { color: #061019; }
.pas-btn--yel { background: linear-gradient(135deg, var(--pas-yellow), var(--pas-yellow-2)); border-color: var(--pas-yellow-2); color: #fff; box-shadow: 0 6px 18px rgba(185, 137, 15, .24); }
:root[data-theme="dark"] .pas-btn--yel { color: #241a04; }
.pas-btn--ghost { background: transparent; }
.pas-btn--sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }
.pas-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* 分步提示 */
.pas-hints { margin-top: 16px; border: 1px dashed var(--pas-line-2); border-radius: 13px; background: var(--pas-paper); overflow: hidden; }
.pas-hints-head { padding: 10px 15px; font-size: 13px; font-weight: 800; color: var(--pas-yellow); background: var(--pas-yellow-soft); display: flex; align-items: center; gap: 8px; }
.pas-hints-list { list-style: none; margin: 0; padding: 0; }
.pas-hints-list li {
    padding: 11px 16px; font-size: 13.5px; line-height: 1.9; color: var(--pas-ink-2);
    border-bottom: 1px dashed var(--pas-line); display: flex; gap: 10px;
}
.pas-hints-list li:last-child { border-bottom: none; }
.pas-hints-list .no {
    flex: 0 0 22px; width: 22px; height: 22px; border-radius: 7px; background: var(--pas-yellow-soft);
    color: var(--pas-yellow); font-size: 12px; font-weight: 800; display: grid; place-items: center; margin-top: 2px;
}
.pas-hints-list b { color: var(--pas-ink); }
.pas-hints-list .blank {
    display: inline-block; min-width: 56px; border-bottom: 2px solid var(--pas-yellow);
    text-align: center; color: var(--pas-ink); font-weight: 800;
}

/* 反馈 */
.pas-feedback { margin-top: 16px; border-radius: 13px; border: 1px solid var(--pas-line); background: var(--pas-paper); padding: 16px 18px; display: none; }
.pas-feedback.show { display: block; animation: pasFade .22s ease; }
@keyframes pasFade { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
.pas-feedback.ok { border-color: var(--pas-green); background: var(--pas-green-soft); }
.pas-feedback.no { border-color: var(--pas-red); background: var(--pas-red-soft); }
.pas-fb-head { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 800; margin-bottom: 10px; }
.pas-feedback.ok .pas-fb-head { color: var(--pas-green); }
.pas-feedback.no .pas-fb-head { color: var(--pas-red); }
.pas-fb-head .mark { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 15px; background: rgba(255, 255, 255, .5); }
.pas-fb-body { font-size: 13.5px; line-height: 1.95; color: var(--pas-ink-2); }
.pas-fb-body b { color: var(--pas-ink); }
.pas-fb-body .k { display: inline-block; background: rgba(255, 255, 255, .55); border-radius: 6px; padding: 1px 7px; font-weight: 800; color: var(--pas-ink); font-family: "Consolas", "Monaco", monospace; }
.pas-fb-steps { margin: 8px 0 0; padding-left: 20px; }
.pas-fb-steps li { margin-bottom: 6px; }
.pas-solution {
    margin-top: 10px; border: 1px solid var(--pas-line); border-radius: 11px; background: var(--pas-paper);
    padding: 12px 14px; font-size: 13px; line-height: 1.9;
}
.pas-solution h4 { font-size: 13px; margin: 0 0 5px; color: var(--pas-blue); font-family: inherit; font-weight: 800; }
.pas-solution p { margin: 0 0 4px; color: var(--pas-ink-2); }
.pas-solution p:last-child { margin-bottom: 0; }
.pas-solution .f { font-family: "Consolas", "Monaco", monospace; font-weight: 800; color: var(--pas-ink); }
.pas-solution.alt { border-left: 3px solid var(--pas-yellow); }

/* ===================== SVG 图形 ===================== */
/* 注意：图形路径放在 transform: scale() 的 <g> 内，描边宽度会被一起放大，
   必须加 vector-effect: non-scaling-stroke 才能保持描边恒定粗细 */
.pas-figure .fig-shape {
    fill: var(--pas-blue-soft);
    stroke: var(--pas-blue);
    stroke-width: 1.6;
    stroke-linejoin: round;
    vector-effect: non-scaling-stroke;
}

.pas-figure .fig-dim { stroke: var(--pas-ink-3); stroke-width: 1; }
.pas-figure .fig-dim-t {
    fill: var(--pas-ink-2);
    font-size: 12px;
    font-weight: 700;
    text-anchor: middle;
    font-family: "Consolas", "Monaco", monospace;
}
.pas-figure .fig-dim-t.v { fill: var(--pas-ink-2); }

.pas-figure .fig-fill--minus {
    fill: var(--pas-red-soft);
    stroke: var(--pas-red);
    stroke-width: 1.4;
    opacity: .9;
    vector-effect: non-scaling-stroke;
}

.pas-figure .fig-split {
    stroke: var(--pas-red);
    stroke-width: 2.6;
    stroke-dasharray: 9 6;
    stroke-linecap: round;
}

.pas-figure .fig-outline {
    fill: none;
    stroke: var(--pas-yellow);
    stroke-width: 2;
    stroke-dasharray: 8 6;
}

/* ===================== 侧栏 ===================== */
.pas-side { display: grid; gap: 18px; }
.pas-card { background: var(--pas-paper); border: 1px solid var(--pas-line); border-radius: 14px; box-shadow: var(--pas-shadow-sm); overflow: hidden; }
.pas-card > header { padding: 11px 16px; background: var(--pas-paper-2); border-bottom: 1px solid var(--pas-line); font-size: 14px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.pas-card > header .note { margin-left: auto; font-size: 11.5px; color: var(--pas-ink-3); font-weight: 600; }
.pas-card-body { padding: 14px 16px 16px; }

.pas-score-ring { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.pas-ring { position: relative; width: 74px; height: 74px; flex: 0 0 auto; }
.pas-ring svg { transform: rotate(-90deg); display: block; }
.pas-ring .val { position: absolute; inset: 0; display: grid; place-items: center; font-size: 19px; font-weight: 800; color: var(--pas-blue); }
.pas-score-meta { font-size: 13px; color: var(--pas-ink-2); line-height: 1.8; }
.pas-score-meta b { color: var(--pas-ink); font-size: 15px; }

.pas-stat-list { list-style: none; margin: 0; padding: 0; }
.pas-stat-list li { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--pas-line); font-size: 13px; color: var(--pas-ink-2); }
.pas-stat-list li:last-child { border-bottom: none; }
.pas-stat-list li b { color: var(--pas-ink); font-weight: 800; }

.pas-type-row { display: flex; align-items: center; gap: 9px; padding: 7px 0; font-size: 13px; }
.pas-type-row .nm { flex: 0 0 88px; color: var(--pas-ink-2); font-weight: 700; }
.pas-type-row .track { flex: 1 1 auto; height: 8px; border-radius: 999px; background: var(--pas-paper-3); overflow: hidden; }
.pas-type-row .track i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--pas-blue), var(--pas-green)); }
.pas-type-row .track i.low { background: linear-gradient(90deg, var(--pas-red), var(--pas-yellow)); }
.pas-type-row .pv { flex: 0 0 56px; text-align: right; font-weight: 800; font-size: 12.5px; }

.pas-wrong-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 300px; overflow: auto; }
.pas-wrong-item { border: 1px solid var(--pas-line); background: var(--pas-paper-2); border-radius: 10px; padding: 9px 11px; font-size: 12.5px; line-height: 1.7; }
.pas-wrong-item .q { color: var(--pas-ink); font-weight: 700; margin-bottom: 3px; }
.pas-wrong-item .a { color: var(--pas-ink-3); }
.pas-wrong-item .a b { color: var(--pas-green); }
.pas-empty { font-size: 13px; color: var(--pas-ink-3); line-height: 1.8; }

/* ===================== 表格 / 预览 ===================== */
.pas-csv-scroll { overflow-x: auto; border: 1px solid var(--pas-line); border-radius: 12px; background: var(--pas-paper-2); }
.pas-csv-table { width: 100%; border-collapse: collapse; font-size: 12.5px; min-width: 620px; }
.pas-csv-table th { text-align: left; font-size: 11.5px; font-weight: 800; color: var(--pas-ink-3); padding: 9px 11px; background: var(--pas-paper-3); border-bottom: 1px solid var(--pas-line-2); white-space: nowrap; }
.pas-csv-table td { padding: 8px 11px; border-bottom: 1px dashed var(--pas-line); color: var(--pas-ink-2); white-space: nowrap; vertical-align: top; }
.pas-csv-table td:nth-child(3) { white-space: normal; min-width: 200px; max-width: 300px; line-height: 1.7; }
.pas-csv-table tr:last-child td { border-bottom: none; }
.pas-csv-table td:first-child { color: var(--pas-ink); font-weight: 800; }
.pas-csv-table td.ok { color: var(--pas-green); font-weight: 800; }
.pas-csv-table td.no { color: var(--pas-red); font-weight: 800; }
.pas-csv-more { margin: 10px 0 0; font-size: 12.5px; color: var(--pas-ink-3); line-height: 1.8; }
.pas-csv-more b { color: var(--pas-blue); }
.pas-export-tip { margin: 14px 0 0; font-size: 12.5px; line-height: 1.9; color: var(--pas-ink-3); background: var(--pas-paper-2); border: 1px dashed var(--pas-line-2); border-radius: 12px; padding: 11px 14px; }

.pas-note-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.pas-note-table th, .pas-note-table td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--pas-line); vertical-align: top; line-height: 1.85; }
.pas-note-table th { width: 104px; color: var(--pas-ink); font-weight: 800; white-space: nowrap; }
.pas-note-table td { color: var(--pas-ink-2); }
.pas-note-table td b { color: var(--pas-ink); }
.pas-note-table tr:last-child th, .pas-note-table tr:last-child td { border-bottom: none; }
.pas-panel-sub { float: right; font-size: 12px; font-weight: 600; color: var(--pas-ink-3); }

/* ===================== 底部标签页 ===================== */
.pas-tabs { display: flex; gap: 4px; margin: 26px 0 14px; border-bottom: 1px solid var(--pas-line); flex-wrap: wrap; }
.pas-tab { border: 0; background: none; cursor: pointer; font-family: inherit; font-size: 14px; font-weight: 700; color: var(--pas-ink-3); padding: 10px 16px; position: relative; transition: color .18s; }
.pas-tab:hover { color: var(--pas-blue); }
.pas-tab.active { color: var(--pas-blue); }
.pas-tab.active::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -1px; height: 3px; border-radius: 3px 3px 0 0; background: linear-gradient(90deg, var(--pas-blue), var(--pas-yellow)); }
.pas-tabpane { display: none; background: var(--pas-paper); border: 1px solid var(--pas-line); border-radius: var(--pas-radius); padding: 24px 26px; box-shadow: var(--pas-shadow-sm); }
.pas-tabpane.active { display: block; animation: pasFade .26s ease; }
.pas-tabpane h2 { font-size: 17px; margin: 0 0 12px; color: var(--pas-ink); }
.pas-tabpane h2:not(:first-child) { margin-top: 24px; }
.pas-tabpane p, .pas-tabpane li { font-size: 14px; line-height: 1.95; color: var(--pas-ink-2); }
.pas-tabpane p b, .pas-tabpane li b { color: var(--pas-ink); }
.pas-tabpane ol { padding-left: 20px; margin: 0; }
.pas-timeline { list-style: none; padding: 0; margin: 0; }
.pas-timeline li { display: flex; gap: 12px; align-items: baseline; margin-bottom: 12px; }
.pas-timeline .ver { font-weight: 800; color: var(--pas-blue); flex: none; }
.pas-timeline .date { color: var(--pas-ink-3); font-size: 12.5px; flex: none; width: 86px; }
.pas-timeline .txt { font-size: 13.5px; line-height: 1.8; color: var(--pas-ink-2); }
.pas-tabpane .pas-faq details { border: 1px solid var(--pas-line); border-radius: 12px; padding: 0 16px; margin-bottom: 10px; background: var(--pas-paper-2); }
.pas-tabpane .pas-faq summary { cursor: pointer; font-size: 14px; font-weight: 700; padding: 13px 0; list-style: none; color: var(--pas-ink); }
.pas-tabpane .pas-faq summary::-webkit-details-marker { display: none; }
.pas-tabpane .pas-faq summary::after { content: "＋"; float: right; color: var(--pas-blue); font-weight: 800; }
.pas-tabpane .pas-faq details[open] summary::after { content: "－"; }
.pas-tabpane .pas-faq .a { padding: 0 0 14px; font-size: 13.5px; line-height: 1.95; color: var(--pas-ink-2); }
.pas-tabpane .pas-faq .a b { color: var(--pas-ink); }

.pas-related { margin-top: 26px; }
.pas-related h2 { font-size: 18px; margin-bottom: 14px; color: var(--pas-ink); }
.pas-rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.pas-rel { display: flex; align-items: center; gap: 11px; padding: 14px 16px; background: var(--pas-paper); border: 1px solid var(--pas-line); border-radius: 14px; text-decoration: none; color: var(--pas-ink); box-shadow: var(--pas-shadow-sm); transition: transform .18s, border-color .18s; }
.pas-rel:hover { transform: translateY(-3px); border-color: var(--pas-blue); }
.pas-rel .ri { font-size: 22px; }
.pas-rel b { font-size: 14px; display: block; }
.pas-rel small { font-size: 12px; color: var(--pas-ink-3); }

.pas-foot { margin: 26px 0 0; text-align: center; font-size: 12.5px; color: var(--pas-ink-3); line-height: 1.9; }

/* ===================== Toast ===================== */
.pas-toast {
    position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 12px);
    background: rgba(14, 30, 52, .95); color: #e6eef8; padding: 11px 20px; border-radius: 12px;
    font-size: 14px; box-shadow: 0 10px 28px rgba(0, 0, 0, .3); opacity: 0; pointer-events: none;
    transition: .22s; z-index: 99998; max-width: 88vw; text-align: center;
}
.pas-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1000px) {
    .pas-hero-grid { grid-template-columns: 1fr; }
    .pas-workspace { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
    .pas-hero { padding: 22px 18px 20px; }
    .pas-hero-copy h1 { font-size: 25px; }
    .pas-panel-head { padding: 13px 16px 11px; }
    .pas-panel-body { padding: 14px 16px 18px; }
    .pas-question { padding: 10px 14px 16px; }
    .pas-answer { padding: 16px 14px 18px; }
    .pas-figure-wrap { padding: 14px 12px 6px; }
    .pas-answer-field { flex: 1 1 100%; }
    .pas-tabpane { padding: 18px 16px; }
}

/* ===================== 打印 ===================== */
.pas-print-only { display: none; }
@media print {
    @page { size: A4 portrait; margin: 12mm 10mm; }
    .pas-page { background: #fff !important; }
    .pas-hero, .pas-panel:not(.pas-print-panel), .pas-workspace > .pas-side, .pas-toast, .pas-foot, .pas-tabs, .pas-tabpane { display: none !important; }
    .pas-print-only { display: block !important; }
    .pas-workspace { display: block; }
    .pas-quiz { border: none; box-shadow: none; }
    .pas-figure { background: #fff; border-color: #999; }
    .pas-print-head { display: block !important; text-align: center; margin-bottom: 5mm; font-size: 15px; font-weight: 800; }
    .pas-print-head small { display: block; font-size: 11px; font-weight: 600; color: #555; margin-top: 2mm; }
    .pas-sheet-item { break-inside: avoid; page-break-inside: avoid; border-bottom: 1px solid #ccc; padding: 3mm 0; }
    .pas-sheet-item .qq { font-size: 13px; color: #111; }
    .pas-sheet-item .aa { font-size: 12px; color: #555; margin-top: 1mm; }
}