/* ==========================================================================
   长方体正方体表面积体积练习 /tool/cuboid-volume-drill
   视觉主题：立体工作台 —— 翠青 #0e7c6b + 橘红 #ea580c + 琥珀金 #b45309
   （独立色系与独立骨架：舞台 + 控制台双栏 + 底部横向数据带）
   ========================================================================== */

.cvd-page {
    --cvd-bg: #eef6f4;
    --cvd-panel: #ffffff;
    --cvd-panel-2: #f7fbfa;
    --cvd-panel-3: #e6f1ee;
    --cvd-ink: #11302a;
    --cvd-ink-2: #4b6a64;
    --cvd-ink-3: #8aa8a1;
    --cvd-line: #d9ebe6;
    --cvd-line-2: #c3ded8;
    --cvd-teal: #0e7c6b;
    --cvd-teal-2: #0a5e51;
    --cvd-teal-soft: #e0f2ee;
    --cvd-orange: #ea580c;
    --cvd-orange-soft: #fdeade;
    --cvd-gold: #b45309;
    --cvd-gold-soft: #fbf0dd;
    --cvd-red: #b91c1c;
    --cvd-red-soft: #fbe9e9;
    --cvd-shadow: 0 16px 38px rgba(15, 66, 58, .14);
    --cvd-shadow-sm: 0 3px 12px rgba(15, 66, 58, .09);
    --cvd-radius: 18px;
    color: var(--cvd-ink);
    font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.78;
    font-variant-numeric: tabular-nums;
    padding-bottom: 56px;
}

:root[data-theme="dark"] .cvd-page {
    --cvd-bg: #0a1614;
    --cvd-panel: #10201d;
    --cvd-panel-2: #162825;
    --cvd-panel-3: #1d322e;
    --cvd-ink: #e7f2ef;
    --cvd-ink-2: #a7c2bb;
    --cvd-ink-3: #6d8c85;
    --cvd-line: #23403a;
    --cvd-line-2: #2f534b;
    --cvd-teal: #45cdb9;
    --cvd-teal-2: #7fe0d1;
    --cvd-teal-soft: #14332d;
    --cvd-orange: #fb923c;
    --cvd-orange-soft: #3a2313;
    --cvd-gold: #e0b25c;
    --cvd-gold-soft: #34280f;
    --cvd-red: #f08a8a;
    --cvd-red-soft: #3a1d1d;
    --cvd-shadow: 0 16px 38px rgba(0, 0, 0, .5);
    --cvd-shadow-sm: 0 3px 12px rgba(0, 0, 0, .4);
}

.cvd-page * { box-sizing: border-box; }
.cvd-page h1, .cvd-page h2, .cvd-page h3 { font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif; margin: 0; }
.cvd-num { font-family: "SFMono-Regular", Consolas, Monaco, monospace; font-weight: 700; letter-spacing: -.3px; }

/* ===================== 首屏 ===================== */
.cvd-hero {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid var(--cvd-line);
    background:
        radial-gradient(760px 320px at 8% -10%, color-mix(in srgb, var(--cvd-teal) 14%, transparent), transparent 62%),
        radial-gradient(620px 300px at 96% 0%, color-mix(in srgb, var(--cvd-orange) 13%, transparent), transparent 60%),
        linear-gradient(180deg, var(--cvd-panel-2), var(--cvd-panel));
    box-shadow: var(--cvd-shadow);
    padding: 34px 34px 30px;
    margin-bottom: 22px;
}

.cvd-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 30px; align-items: start; }

.cvd-kicker {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 800; letter-spacing: 2px;
    color: var(--cvd-teal); background: var(--cvd-teal-soft);
    border: 1px solid color-mix(in srgb, var(--cvd-teal) 28%, transparent);
    border-radius: 999px; padding: 5px 14px; margin-bottom: 14px;
}
.cvd-hero h1 { font-size: 34px; line-height: 1.24; letter-spacing: -.8px; color: var(--cvd-ink); margin-bottom: 12px; }
.cvd-hero h1 em { font-style: normal; color: var(--cvd-orange); }
.cvd-lead { margin: 0 0 16px; font-size: 15.5px; line-height: 1.95; color: var(--cvd-ink-2); max-width: 62ch; }
.cvd-lead b { color: var(--cvd-ink); font-weight: 700; }

.cvd-points { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr)); gap: 9px; }
.cvd-points li {
    display: flex; align-items: flex-start; gap: 8px;
    font-size: 13px; line-height: 1.7; color: var(--cvd-ink-2);
    background: var(--cvd-panel); border: 1px solid var(--cvd-line);
    border-radius: 12px; padding: 10px 13px; font-weight: 600;
}
.cvd-points li i { font-style: normal; color: var(--cvd-orange); font-weight: 800; }

/* 首屏速算卡：操作入口直接落在首屏 */
.cvd-quick { background: var(--cvd-panel); border: 1px solid var(--cvd-line-2); border-radius: 16px; box-shadow: var(--cvd-shadow-sm); overflow: hidden; }
.cvd-quick-head {
    padding: 10px 16px; font-size: 12.5px; font-weight: 800; letter-spacing: 1.5px; color: #fff;
    background: linear-gradient(135deg, var(--cvd-teal), var(--cvd-teal-2));
}
:root[data-theme="dark"] .cvd-quick-head { color: #08201c; }
.cvd-quick-body { padding: 13px 14px 15px; display: grid; gap: 9px; }
.cvd-formula {
    display: flex; align-items: center; gap: 10px; width: 100%; text-align: left; cursor: pointer;
    border: 1px solid var(--cvd-line-2); background: var(--cvd-panel-2); color: var(--cvd-ink);
    border-radius: 12px; padding: 10px 12px; font-family: inherit; transition: .16s;
}
.cvd-formula:hover { border-color: var(--cvd-teal); transform: translateX(2px); }
.cvd-formula .fi { flex: 0 0 30px; width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; font-size: 15px; background: var(--cvd-teal-soft); }
.cvd-formula b { display: block; font-size: 13.5px; }
.cvd-formula small { display: block; font-size: 11.5px; color: var(--cvd-ink-3); line-height: 1.6; }
.cvd-formula .f { font-family: "SFMono-Regular", Consolas, monospace; font-weight: 700; color: var(--cvd-orange); font-size: 12.5px; }
.cvd-quick-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 4px; }
.cvd-quick-actions button {
    border: 1px solid var(--cvd-line-2); background: var(--cvd-panel-2); color: var(--cvd-ink-2);
    border-radius: 10px; padding: 9px 8px; font-size: 13px; font-weight: 700; font-family: inherit; cursor: pointer; transition: .16s;
}
.cvd-quick-actions button:hover { border-color: var(--cvd-orange); color: var(--cvd-orange); }
.cvd-quick-actions button.primary { background: linear-gradient(135deg, var(--cvd-orange), #c2410c); border-color: transparent; color: #fff; }
:root[data-theme="dark"] .cvd-quick-actions button.primary { color: #1b0c04; }

/* ===================== 工作台 ===================== */
.cvd-workbench { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 22px; align-items: start; margin-bottom: 22px; }

.cvd-stage {
    background: var(--cvd-panel); border: 1px solid var(--cvd-line);
    border-radius: var(--cvd-radius); box-shadow: var(--cvd-shadow); overflow: hidden;
}
.cvd-stage-bar {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    padding: 11px 18px; background: var(--cvd-panel-2); border-bottom: 1px solid var(--cvd-line);
}
.cvd-stage-bar .tag {
    font-size: 11.5px; font-weight: 800; letter-spacing: .5px; color: var(--cvd-teal);
    background: var(--cvd-teal-soft); border-radius: 999px; padding: 3px 11px;
}
.cvd-stage-bar .tag.or { color: var(--cvd-orange); background: var(--cvd-orange-soft); }
.cvd-stage-bar .sp { margin-left: auto; font-size: 12px; color: var(--cvd-ink-3); font-weight: 600; }

.cvd-canvas { padding: 16px 18px 8px; }
.cvd-canvas svg { display: block; width: 100%; height: auto; }

/* 立体图 */
.cvdf-shadow { fill: color-mix(in srgb, var(--cvd-ink) 8%, transparent); stroke: none; }
.cvdf { stroke: var(--cvd-ink); stroke-width: 1.6; stroke-linejoin: round; }
.cvdf-top { fill: color-mix(in srgb, var(--cvd-teal) 26%, var(--cvd-panel)); }
.cvdf-front { fill: color-mix(in srgb, var(--cvd-orange) 24%, var(--cvd-panel)); }
.cvdf-side { fill: color-mix(in srgb, var(--cvd-gold) 26%, var(--cvd-panel)); }
.cvdf.ghost { fill: var(--cvd-panel-3); stroke: var(--cvd-ink-3); stroke-dasharray: 6 4; opacity: .75; }
.cvdf-dim { stroke: var(--cvd-ink-3); stroke-width: 1.1; stroke-dasharray: 4 3; }
.cvdf-dimt { font-size: 12.5px; fill: var(--cvd-ink); font-weight: 700; }
.cvdf-flag { font-size: 12px; fill: var(--cvd-ink-2); font-weight: 800; }
.cvd-legend { display: flex; flex-wrap: wrap; gap: 8px; padding: 4px 18px 14px; }
.cvd-legend span {
    display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--cvd-ink-2);
    background: var(--cvd-panel-2); border: 1px solid var(--cvd-line); border-radius: 999px; padding: 3px 10px;
}
.cvd-legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.cvd-legend i.t { background: var(--cvd-teal); }
.cvd-legend i.o { background: var(--cvd-orange); }
.cvd-legend i.g { background: var(--cvd-gold); }
.cvd-legend i.x { background: var(--cvd-ink-3); opacity: .55; }

.cvd-faces { padding: 0 18px 16px; }
.cvd-face-list { display: grid; gap: 7px; }
.cvd-face-item {
    display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--cvd-ink-2);
    background: var(--cvd-panel-2); border: 1px solid var(--cvd-line); border-radius: 10px; padding: 8px 12px;
}
.cvd-face-item b { color: var(--cvd-ink); }
.cvd-face-item .dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.cvd-face-item .dot.t { background: var(--cvd-teal); }
.cvd-face-item .dot.o { background: var(--cvd-orange); }
.cvd-face-item .dot.g { background: var(--cvd-gold); }
.cvd-face-item .dot.x { background: var(--cvd-ink-3); opacity: .5; }
.cvd-face-item.off { opacity: .6; }
.cvd-face-item.off .txt { text-decoration: line-through; }

/* ===================== 控制台 ===================== */
.cvd-console {
    background: var(--cvd-panel); border: 1px solid var(--cvd-line);
    border-radius: var(--cvd-radius); box-shadow: var(--cvd-shadow); overflow: hidden;
}
.cvd-console-head { padding: 14px 20px 12px; border-bottom: 1px solid var(--cvd-line); background: var(--cvd-panel-2); }
.cvd-console-head .k { font-size: 11.5px; font-weight: 800; letter-spacing: 2px; color: var(--cvd-orange); }
.cvd-console-head h2 { font-size: 18px; margin: 2px 0 0; color: var(--cvd-ink); }

.cvd-qtext { padding: 16px 20px 6px; font-size: 16.5px; line-height: 2; color: var(--cvd-ink); }
.cvd-qtext b { color: var(--cvd-orange); font-weight: 800; }
.cvd-qmeta { padding: 0 20px 14px; font-size: 12.5px; color: var(--cvd-ink-3); }

.cvd-inputs { padding: 4px 20px 16px; display: grid; gap: 10px; }
.cvd-field { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 10px; align-items: center; }
.cvd-field label { font-size: 12.5px; font-weight: 700; color: var(--cvd-ink-2); }
.cvd-field label i { font-style: normal; color: var(--cvd-ink-3); font-weight: 500; font-size: 11.5px; }
.cvd-input {
    width: 100%; padding: 10px 12px; border: 1px solid var(--cvd-line-2); border-radius: 10px;
    background: var(--cvd-panel-2); color: var(--cvd-ink); font-size: 15px; font-family: inherit; transition: border-color .16s, box-shadow .16s;
}
.cvd-input:focus { outline: none; border-color: var(--cvd-teal); box-shadow: 0 0 0 3px var(--cvd-teal-soft); }
.cvd-input.correct { border-color: var(--cvd-teal); background: var(--cvd-teal-soft); }
.cvd-input.wrong { border-color: var(--cvd-red); background: var(--cvd-red-soft); }
.cvd-input::placeholder { color: var(--cvd-ink-3); font-weight: 500; }

.cvd-actions { padding: 0 20px 14px; display: flex; gap: 9px; flex-wrap: wrap; }
.cvd-btn {
    border: 1px solid var(--cvd-line-2); background: var(--cvd-panel-2); color: var(--cvd-ink);
    padding: 10px 17px; border-radius: 11px; font-size: 14px; font-weight: 700; font-family: inherit; cursor: pointer;
    transition: transform .14s, border-color .16s, box-shadow .16s;
}
.cvd-btn:hover { transform: translateY(-1px); border-color: var(--cvd-teal); }
.cvd-btn--primary { background: linear-gradient(135deg, var(--cvd-teal), var(--cvd-teal-2)); border-color: transparent; color: #fff; box-shadow: 0 6px 18px rgba(14, 124, 107, .26); }
:root[data-theme="dark"] .cvd-btn--primary { color: #06201c; }
.cvd-btn--or { background: linear-gradient(135deg, var(--cvd-orange), #c2410c); border-color: transparent; color: #fff; box-shadow: 0 6px 18px rgba(234, 88, 12, .26); }
:root[data-theme="dark"] .cvd-btn--or { color: #1b0c04; }
.cvd-btn--sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }
.cvd-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.cvd-hints { margin: 0 20px 16px; border: 1px dashed var(--cvd-line-2); border-radius: 13px; overflow: hidden; background: var(--cvd-panel-2); }
.cvd-hints-head { padding: 9px 14px; font-size: 12.5px; font-weight: 800; color: var(--cvd-teal); background: var(--cvd-teal-soft); }
.cvd-hints ol { list-style: none; margin: 0; padding: 0; }
.cvd-hints li { display: flex; gap: 9px; padding: 10px 14px; font-size: 13.5px; line-height: 1.9; color: var(--cvd-ink-2); border-bottom: 1px dashed var(--cvd-line); }
.cvd-hints li:last-child { border-bottom: none; }
.cvd-hints li .no { flex: 0 0 21px; width: 21px; height: 21px; border-radius: 7px; background: var(--cvd-panel); color: var(--cvd-teal); font-size: 11.5px; font-weight: 800; display: grid; place-items: center; margin-top: 3px; }
.cvd-hints li b { color: var(--cvd-ink); }

.cvd-feedback { margin: 0 20px 20px; border-radius: 13px; border: 1px solid var(--cvd-line); background: var(--cvd-panel-2); padding: 15px 17px; display: none; }
.cvd-feedback.show { display: block; animation: cvdFade .22s ease; }
@keyframes cvdFade { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
.cvd-feedback.ok { border-color: var(--cvd-teal); background: var(--cvd-teal-soft); }
.cvd-feedback.no { border-color: var(--cvd-red); background: var(--cvd-red-soft); }
.cvd-fb-head { display: flex; align-items: center; gap: 9px; font-size: 15.5px; font-weight: 800; margin-bottom: 9px; }
.cvd-feedback.ok .cvd-fb-head { color: var(--cvd-teal); }
.cvd-feedback.no .cvd-fb-head { color: var(--cvd-red); }
.cvd-fb-head .mark { width: 25px; height: 25px; border-radius: 8px; display: grid; place-items: center; font-size: 14px; background: rgba(255, 255, 255, .55); }
.cvd-fb-body { font-size: 13.5px; line-height: 1.95; color: var(--cvd-ink-2); }
.cvd-fb-body b { color: var(--cvd-ink); }
.cvd-fb-body .k { display: inline-block; background: rgba(255, 255, 255, .6); border-radius: 6px; padding: 1px 7px; font-weight: 800; color: var(--cvd-ink); font-family: "SFMono-Regular", Consolas, monospace; }
.cvd-steps { margin: 7px 0 0; padding-left: 19px; }
.cvd-steps li { margin-bottom: 5px; }
.cvd-check { margin-top: 9px; border: 1px solid var(--cvd-line); border-radius: 11px; background: var(--cvd-panel); padding: 11px 13px; font-size: 12.5px; line-height: 1.9; color: var(--cvd-ink-2); }
.cvd-check b { color: var(--cvd-teal); }

/* ===================== 底部数据带 ===================== */
.cvd-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-bottom: 22px; }
.cvd-card { background: var(--cvd-panel); border: 1px solid var(--cvd-line); border-radius: 16px; box-shadow: var(--cvd-shadow-sm); overflow: hidden; }
.cvd-card > header { padding: 11px 16px; background: var(--cvd-panel-2); border-bottom: 1px solid var(--cvd-line); font-size: 14px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.cvd-card > header .note { margin-left: auto; font-size: 11.5px; color: var(--cvd-ink-3); font-weight: 600; }
.cvd-card-body { padding: 14px 16px 16px; }

.cvd-ring-row { display: flex; align-items: center; gap: 14px; }
.cvd-ring { position: relative; width: 78px; height: 78px; flex: 0 0 auto; }
.cvd-ring svg { transform: rotate(-90deg); display: block; }
.cvd-ring .val { position: absolute; inset: 0; display: grid; place-items: center; font-size: 20px; font-weight: 800; color: var(--cvd-teal); }
.cvd-score-meta { font-size: 13px; color: var(--cvd-ink-2); line-height: 1.85; }
.cvd-score-meta b { color: var(--cvd-ink); font-size: 15px; }

.cvd-type-row { display: flex; align-items: center; gap: 9px; padding: 6px 0; font-size: 13px; }
.cvd-type-row .nm { flex: 0 0 92px; color: var(--cvd-ink-2); font-weight: 700; }
.cvd-type-row .track { flex: 1 1 auto; height: 8px; border-radius: 999px; background: var(--cvd-panel-3); overflow: hidden; }
.cvd-type-row .track i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--cvd-teal), var(--cvd-orange)); }
.cvd-type-row .track i.low { background: linear-gradient(90deg, var(--cvd-red), var(--cvd-gold)); }
.cvd-type-row .pv { flex: 0 0 52px; text-align: right; font-weight: 800; font-size: 12.5px; }

.cvd-wrong-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 262px; overflow: auto; }
.cvd-wrong-item { border: 1px solid var(--cvd-line); background: var(--cvd-panel-2); border-radius: 10px; padding: 9px 11px; font-size: 12.5px; line-height: 1.7; }
.cvd-wrong-item .q { color: var(--cvd-ink); font-weight: 700; margin-bottom: 3px; }
.cvd-wrong-item .a { color: var(--cvd-ink-3); }
.cvd-wrong-item .a b { color: var(--cvd-teal); }
.cvd-empty { font-size: 13px; color: var(--cvd-ink-3); line-height: 1.85; }

/* ===================== 导出表格 ===================== */
.cvd-panel2 { background: var(--cvd-panel); border: 1px solid var(--cvd-line); border-radius: var(--cvd-radius); box-shadow: var(--cvd-shadow-sm); margin-bottom: 22px; overflow: hidden; }
.cvd-panel2-head { padding: 15px 22px 13px; border-bottom: 1px solid var(--cvd-line); background: var(--cvd-panel-2); }
.cvd-panel2-head .k { font-size: 11.5px; font-weight: 800; letter-spacing: 2px; color: var(--cvd-teal); }
.cvd-panel2-head h2 { font-size: 19px; margin: 3px 0 4px; }
.cvd-panel2-head p { margin: 0; font-size: 13px; color: var(--cvd-ink-3); line-height: 1.8; }
.cvd-panel2-body { padding: 18px 22px 22px; }

.cvd-csv-scroll { overflow-x: auto; border: 1px solid var(--cvd-line); border-radius: 12px; background: var(--cvd-panel-2); }
.cvd-csv-table { width: 100%; border-collapse: collapse; font-size: 12.5px; min-width: 680px; }
.cvd-csv-table th { text-align: left; font-size: 11.5px; font-weight: 800; color: var(--cvd-ink-3); padding: 9px 11px; background: var(--cvd-panel-3); border-bottom: 1px solid var(--cvd-line-2); white-space: nowrap; }
.cvd-csv-table td { padding: 8px 11px; border-bottom: 1px dashed var(--cvd-line); color: var(--cvd-ink-2); white-space: nowrap; vertical-align: top; }
.cvd-csv-table td.wrap { white-space: normal; min-width: 260px; max-width: 360px; line-height: 1.75; }
.cvd-csv-table tr:last-child td { border-bottom: none; }
.cvd-csv-table td:first-child { color: var(--cvd-ink); font-weight: 800; }
.cvd-csv-table td.ok { color: var(--cvd-teal); font-weight: 800; }
.cvd-csv-table td.no { color: var(--cvd-red); font-weight: 800; }
.cvd-csv-more { margin: 10px 0 0; font-size: 12.5px; color: var(--cvd-ink-3); line-height: 1.8; }
.cvd-csv-more b { color: var(--cvd-teal); }
.cvd-export-tip { margin: 14px 0 0; font-size: 12.5px; line-height: 1.9; color: var(--cvd-ink-3); background: var(--cvd-panel-2); border: 1px dashed var(--cvd-line-2); border-radius: 12px; padding: 11px 14px; }

.cvd-note-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.cvd-note-table th, .cvd-note-table td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--cvd-line); vertical-align: top; line-height: 1.85; }
.cvd-note-table th { width: 108px; color: var(--cvd-ink); font-weight: 800; white-space: nowrap; }
.cvd-note-table td { color: var(--cvd-ink-2); }
.cvd-note-table td b { color: var(--cvd-ink); }
.cvd-note-table tr:last-child th, .cvd-note-table tr:last-child td { border-bottom: none; }

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

.cvd-related { margin-top: 26px; }
.cvd-related h2 { font-size: 18px; margin-bottom: 14px; }
.cvd-rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.cvd-rel { display: flex; align-items: center; gap: 11px; padding: 14px 16px; background: var(--cvd-panel); border: 1px solid var(--cvd-line); border-radius: 14px; text-decoration: none; color: var(--cvd-ink); box-shadow: var(--cvd-shadow-sm); transition: transform .18s, border-color .18s; }
.cvd-rel:hover { transform: translateY(-3px); border-color: var(--cvd-teal); }
.cvd-rel .ri { font-size: 22px; }
.cvd-rel b { font-size: 14px; display: block; }
.cvd-rel small { font-size: 12px; color: var(--cvd-ink-3); }
.cvd-foot { margin: 26px 0 0; text-align: center; font-size: 12.5px; color: var(--cvd-ink-3); line-height: 1.9; }

/* ===================== Toast ===================== */
.cvd-toast {
    position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 12px);
    background: rgba(10, 40, 35, .95); color: #eafaf6; 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;
}
.cvd-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1080px) {
    .cvd-hero-grid { grid-template-columns: 1fr; }
    .cvd-workbench { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
    .cvd-hero { padding: 24px 18px 22px; }
    .cvd-hero h1 { font-size: 26px; }
    .cvd-field { grid-template-columns: 1fr; gap: 5px; }
    .cvd-qtext { padding: 14px 16px 6px; font-size: 15.5px; }
    .cvd-inputs, .cvd-actions { padding-left: 16px; padding-right: 16px; }
    .cvd-hints, .cvd-feedback { margin-left: 16px; margin-right: 16px; }
    .cvd-panel2-body { padding: 14px 16px 18px; }
    .cvd-tabpane { padding: 18px 16px; }
}

/* ===================== 打印 ===================== */
.cvd-print-only { display: none; }
@media print {
    @page { size: A4 portrait; margin: 12mm 10mm; }
    .cvd-page { background: #fff !important; }
    .cvd-hero, .cvd-panel2, .cvd-stats, .cvd-toast, .cvd-foot, .cvd-tabs, .cvd-tabpane { display: none !important; }
    .cvd-print-only { display: block !important; }
    .cvd-workbench { display: block; }
    .cvd-stage { border: none; box-shadow: none; }
    .cvd-console { display: none !important; }
    .cvd-print-head { display: block !important; text-align: center; margin-bottom: 5mm; font-size: 15px; font-weight: 800; }
    .cvd-print-head small { display: block; font-size: 11px; font-weight: 600; color: #555; margin-top: 2mm; }
    .cvd-sheet-item { break-inside: avoid; page-break-inside: avoid; border-bottom: 1px solid #ccc; padding: 3mm 0; }
    .cvd-sheet-item .qq { font-size: 13px; color: #111; }
    .cvd-sheet-item .aa { font-size: 12px; color: #555; margin-top: 1mm; }
}