/* ==========================================================================
   知识付费课程定价与毛利计算器
   设计语言：课程上架后台 + 价签 / 深紫封面
   作用域：.cb-page（变量 cb- 前缀）
   ========================================================================== */

.cb-page {
    --cb-bg: #f6f4fb;
    --cb-card: #ffffff;
    --cb-ink: #1b1526;
    --cb-ink-2: #554c68;
    --cb-ink-3: #8b8299;
    --cb-line: #e3def0;
    --cb-line-2: #f0ecfa;
    --cb-violet: #6d4aff;
    --cb-violet-2: #9b7bff;
    --cb-violet-soft: #efeafe;
    --cb-gold: #d99a2b;
    --cb-gold-soft: #fdf3df;
    --cb-pink: #e0557a;
    --cb-green: #17876a;
    --cb-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
    --cb-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;

    background:
        radial-gradient(600px 320px at 0% 0%, rgba(109, 74, 255, .08), transparent 62%),
        radial-gradient(520px 260px at 100% 8%, rgba(224, 169, 60, .08), transparent 60%),
        var(--cb-bg);
    color: var(--cb-ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

:root[data-theme="dark"] .cb-page {
    --cb-bg: #0e0b16;
    --cb-card: #171225;
    --cb-ink: #efeaf9;
    --cb-ink-2: #b0a6c4;
    --cb-ink-3: #7d7292;
    --cb-line: #2a2340;
    --cb-line-2: #201a33;
    --cb-violet: #a78bff;
    --cb-violet-2: #c3afff;
    --cb-violet-soft: #241b41;
    --cb-gold: #e7b959;
    --cb-gold-soft: #2c2312;
    --cb-pink: #f0819f;
    --cb-green: #5cc9a8;
    background:
        radial-gradient(600px 320px at 0% 0%, rgba(167, 139, 255, .1), transparent 62%),
        radial-gradient(520px 260px at 100% 8%, rgba(231, 185, 89, .06), transparent 60%),
        var(--cb-bg);
}

.cb-page *, .cb-page *::before, .cb-page *::after { box-sizing: border-box; }
.cb-wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.cb-page a { color: inherit; text-decoration: none; }

/* ---------- 首屏（深色，课程货架感） ---------- */
.cb-hero {
    position: relative;
    overflow: hidden;
    padding: 26px 0 54px;
    color: #f3eefc;
    background:
        radial-gradient(620px 340px at 88% -4%, rgba(155, 123, 255, .34), transparent 62%),
        radial-gradient(520px 300px at 4% 18%, rgba(224, 169, 60, .16), transparent 66%),
        linear-gradient(158deg, #171022 0%, #241a3d 56%, #120d1d 100%);
}

.cb-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, .6), transparent 78%);
    pointer-events: none;
}

.cb-hero > .cb-wrap { position: relative; z-index: 1; }

.cb-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.cb-crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(243, 238, 252, .56); }
.cb-crumb a { color: rgba(243, 238, 252, .82); }
.cb-crumb a:hover { color: var(--cb-violet-2); }
.cb-crumb i { font-style: normal; opacity: .45; }
.cb-crumb b { color: #fff; font-weight: 600; }

.cb-modes { display: inline-flex; padding: 3px; border: 1px solid rgba(243, 238, 252, .18); border-radius: 999px; background: rgba(255, 255, 255, .05); }
.cb-modes button { border: 0; background: transparent; color: rgba(243, 238, 252, .72); font: inherit; font-size: 12.5px; padding: 7px 12px; border-radius: 999px; cursor: pointer; transition: all .18s ease; }
.cb-modes button.is-on { background: var(--cb-violet); color: #fff; font-weight: 600; }

.cb-hero-grid { display: grid; grid-template-columns: minmax(0, .96fr) minmax(0, 1.04fr); gap: 40px; align-items: start; }

.cb-kicker { margin: 0 0 14px; font-family: var(--cb-mono); font-size: 11px; letter-spacing: .22em; color: var(--cb-gold); font-weight: 700; }

.cb-intro h1 { margin: 0 0 16px; font-family: var(--cb-display); font-size: clamp(32px, 3.9vw, 50px); line-height: 1.18; font-weight: 800; letter-spacing: -.02em; color: #fff; }
.cb-intro h1 em { font-style: normal; color: var(--cb-violet-2); }

.cb-lede { margin: 0 0 20px; max-width: 33em; font-size: 15px; line-height: 1.95; color: rgba(243, 238, 252, .72); }
.cb-lede strong { color: #fff; font-weight: 700; }

.cb-chips { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 9px; }
.cb-chips li { display: flex; gap: 10px; align-items: baseline; font-size: 13.5px; color: rgba(243, 238, 252, .72); }
.cb-chips b { flex: none; min-width: 36px; padding: 1px 7px; border-radius: 4px; border: 1px solid rgba(155, 123, 255, .42); color: var(--cb-violet-2); font-size: 11.5px; text-align: center; }

.cb-presets { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.cb-presets > span { font-size: 12.5px; color: rgba(243, 238, 252, .5); }
.cb-presets button { font: inherit; font-size: 12.5px; padding: 7px 12px; border-radius: 6px; border: 1px solid rgba(243, 238, 252, .22); background: transparent; color: rgba(243, 238, 252, .84); cursor: pointer; transition: all .16s ease; }
.cb-presets button:hover,
.cb-presets button.is-on { border-color: var(--cb-gold); background: rgba(224, 169, 60, .14); color: #fff; }

/* ---------- 上架编辑卡 ---------- */
.cb-editor { border-radius: 14px; overflow: hidden; background: #fff; color: var(--cb-ink); box-shadow: 0 40px 70px -40px rgba(0, 0, 0, .8); }

.cb-cover {
    position: relative;
    padding: 18px 20px 20px;
    background:
        radial-gradient(240px 160px at 88% 10%, rgba(224, 169, 60, .5), transparent 60%),
        linear-gradient(135deg, #6d4aff 0%, #8f5cff 46%, #4b2fb0 100%);
    color: #fff;
}

.cb-cover::after {
    content: "";
    position: absolute;
    right: -30px; bottom: -46px;
    width: 150px; height: 150px;
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 50%;
    box-shadow: 0 0 0 18px rgba(255, 255, 255, .08);
}

.cb-cover-tag { display: inline-block; padding: 2px 8px; border-radius: 3px; background: rgba(255, 255, 255, .18); font-size: 10px; letter-spacing: .1em; }
.cb-cover-title { margin-top: 26px; font-size: 24px; line-height: 1.35; font-weight: 800; letter-spacing: -.01em; }
.cb-cover-meta { margin-top: 6px; font-family: var(--cb-mono); font-size: 10.5px; letter-spacing: .06em; opacity: .78; }

.cb-editor-body { padding: 16px 20px 18px; }
.cb-editor-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding-bottom: 10px; border-bottom: 1px solid var(--cb-line); }
.cb-editor-head h2 { margin: 0; font-size: 15px; font-weight: 800; }
.cb-editor-head span { font-family: var(--cb-mono); font-size: 9px; letter-spacing: .12em; color: var(--cb-ink-3); }

.cb-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px 12px; padding: 12px 0; }
.cb-field { display: grid; gap: 3px; min-width: 0; }
.cb-field > span { font-size: 11px; color: var(--cb-ink-3); }
.cb-field .cb-input { display: flex; align-items: center; gap: 5px; padding: 0 9px; border: 1px solid var(--cb-line); border-radius: 7px; background: #f8f7fd; transition: border-color .16s ease, box-shadow .16s ease; }
.cb-field .cb-input:focus-within { border-color: var(--cb-violet); box-shadow: 0 0 0 3px rgba(109, 74, 255, .13); }
.cb-field input { width: 100%; min-width: 0; border: 0; outline: none; background: transparent; color: #1b1526; font: inherit; font-family: var(--cb-mono); font-size: 13.5px; padding: 7px 0; font-variant-numeric: tabular-nums; }
.cb-page .cb-field .cb-input input { background: transparent; color: #1b1526; -webkit-text-fill-color: #1b1526; }
:root[data-theme="dark"] .cb-field .cb-input { background: #120e1e; border-color: #2c2442; }
:root[data-theme="dark"] .cb-field .cb-input input { color: #efeaf9; -webkit-text-fill-color: #efeaf9; }
.cb-field .cb-input em { flex: none; font-style: normal; font-size: 10.5px; color: var(--cb-ink-3); }

.cb-preview { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; padding-top: 12px; border-top: 1px dashed var(--cb-line); }
.cb-preview > div > span { display: block; font-size: 11.5px; color: var(--cb-ink-3); }
.cb-preview b { display: flex; align-items: baseline; gap: 2px; font-family: var(--cb-display); font-size: clamp(30px, 3.4vw, 38px); font-weight: 800; line-height: 1.1; color: var(--cb-violet); font-variant-numeric: tabular-nums; }
.cb-preview b small { font-size: 14px; }
.cb-preview-side { display: grid; gap: 5px; text-align: right; font-size: 11px; color: var(--cb-ink-3); }
.cb-preview-side b { display: block; font-family: var(--cb-mono); font-size: 13.5px; color: var(--cb-ink); }
.cb-preview-side b span { font: inherit; color: inherit; }

.cb-note { margin: 10px 0 0; font-size: 11.5px; line-height: 1.6; color: var(--cb-ink-3); }

/* ---------- 正文 ---------- */
.cb-body { display: grid; grid-template-columns: minmax(0, 1fr) 292px; gap: 30px; padding: 38px 0 30px; align-items: start; }
.cb-main { display: grid; gap: 20px; min-width: 0; }
.cb-main > * { min-width: 0; }
.cb-card { background: var(--cb-card); border: 1px solid var(--cb-line); border-radius: 14px; padding: 24px 26px; box-shadow: 0 20px 44px -46px rgba(27, 21, 38, .55); }
.cb-card-head { margin-bottom: 12px; }
.cb-card-head h2 { margin: 0; font-size: 18px; font-weight: 800; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cb-card-head h2 i { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--cb-violet-soft); color: var(--cb-violet); font-style: normal; font-family: var(--cb-mono); font-size: 11px; font-weight: 700; }
.cb-card-head p { margin: 7px 0 0; font-size: 13px; color: var(--cb-ink-3); }

.cb-flow { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; margin: 14px 0 16px; }
.cb-flow-node { padding: 4px 9px; border-radius: 5px; background: var(--cb-line-2); font-size: 11px; color: var(--cb-ink-2); }
.cb-flow-node.is-end { background: var(--cb-violet); color: #fff; font-weight: 700; }
.cb-flow i { width: 12px; height: 1px; background: var(--cb-line); position: relative; }
.cb-flow i::after { content: ""; position: absolute; right: 0; top: -2px; border: 2.5px solid transparent; border-left-color: var(--cb-line); }

.cb-bill { display: grid; gap: 0; border: 1px solid var(--cb-line); border-radius: 10px; padding: 2px 14px; }
.cb-bill-row { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--cb-line); font-size: 13px; }
.cb-bill-row:last-of-type { border-bottom: 0; }
.cb-bill-row span { color: var(--cb-ink-2); }
.cb-bill-row b { font-family: var(--cb-mono); font-variant-numeric: tabular-nums; }
.cb-bill-row.is-minus b { color: var(--cb-pink); }
.cb-bill-total { display: flex; justify-content: space-between; gap: 10px; margin: 4px -14px 0; padding: 11px 14px; border-radius: 0 0 10px 10px; background: var(--cb-ink); color: #fff; font-size: 13px; }
.cb-bill-total b { font-family: var(--cb-mono); font-size: 18px; color: #fff; }

.cb-compose { display: flex; height: 16px; margin-top: 14px; border-radius: 4px; overflow: hidden; background: var(--cb-line-2); }
.cb-seg { height: 100%; width: 0; transition: width .4s ease; }
.cb-seg.seg-net { background: linear-gradient(180deg, var(--cb-violet-2), var(--cb-violet)); }
.cb-seg.seg-platform { background: var(--cb-pink); }
.cb-seg.seg-pay { background: var(--cb-gold); }
.cb-seg.seg-cac { background: #7d88a8; }
.cb-seg.seg-fulfill { background: #b9c0cf; }

.cb-legend { list-style: none; margin: 9px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 11.5px; color: var(--cb-ink-3); }
.cb-legend li { display: flex; align-items: center; gap: 5px; }
.cb-legend i { width: 8px; height: 8px; border-radius: 2px; }
.cb-legend .seg-net { background: var(--cb-violet); }
.cb-legend .seg-platform { background: var(--cb-pink); }
.cb-legend .seg-pay { background: var(--cb-gold); }
.cb-legend .seg-cac { background: #7d88a8; }
.cb-legend .seg-fulfill { background: #b9c0cf; }
.cb-legend b { font-family: var(--cb-mono); color: var(--cb-ink); }

.cb-fixed { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px 12px; margin-top: 14px; }
.cb-fixed-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.cb-fixed-stats > div { border: 1px solid var(--cb-line); border-radius: 10px; padding: 12px 14px; background: linear-gradient(180deg, var(--cb-violet-soft), transparent 150%); }
.cb-fixed-stats > div > span { display: block; font-size: 11px; color: var(--cb-ink-3); }
.cb-fixed-stats b { display: block; margin-top: 2px; font-family: var(--cb-mono); font-size: 20px; font-variant-numeric: tabular-nums; }
.cb-fixed-stats b span { font: inherit; color: inherit; }
.cb-fixed-stats em { display: block; margin-top: 2px; font-style: normal; font-size: 10.5px; color: var(--cb-ink-3); }

.cb-table-wrap { margin-top: 14px; overflow-x: auto; border: 1px solid var(--cb-line); border-radius: 10px; }
.cb-table { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 13px; }
.cb-table th, .cb-table td { padding: 10px 12px; text-align: right; border-bottom: 1px solid var(--cb-line-2); white-space: nowrap; }
.cb-table th { background: var(--cb-bg); color: var(--cb-ink-2); font-size: 12px; font-weight: 600; }
.cb-table th:first-child, .cb-table td:first-child { text-align: left; }
.cb-table td { font-family: var(--cb-mono); font-variant-numeric: tabular-nums; }
.cb-table tbody tr:last-child td { border-bottom: 0; }
.cb-table tr.is-on { background: var(--cb-violet-soft); }
.cb-table tr.is-on td { color: var(--cb-violet); font-weight: 700; }
.cb-tip { margin: 10px 0 0; font-size: 11.5px; color: var(--cb-ink-3); }

.cb-bars { display: flex; align-items: flex-end; gap: 10px; height: 150px; margin-top: 16px; padding-top: 6px; border-bottom: 1px solid var(--cb-line); }
.cb-bar-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; gap: 4px; height: 100%; min-width: 0; }
.cb-bar-space { position: relative; flex: 1; min-height: 0; }
.cb-bar { position: absolute; left: 0; right: 0; bottom: 0; border-radius: 4px 4px 0 0; background: linear-gradient(180deg, var(--cb-violet-2), var(--cb-violet)); opacity: .85; transition: height .35s ease; }
.cb-bar.is-bad { background: linear-gradient(180deg, #f2a08f, var(--cb-pink)); }
.cb-bar-col em { font-style: normal; text-align: center; font-family: var(--cb-mono); font-size: 10px; color: var(--cb-ink-3); }
.cb-axis { display: flex; justify-content: space-between; padding: 6px 4px 0; font-family: var(--cb-mono); font-size: 10.5px; color: var(--cb-ink-3); }

.cb-sens { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; margin-top: 14px; }
.cb-sens > div { border: 1px solid var(--cb-line); border-radius: 8px; padding: 9px 11px; font-size: 11px; color: var(--cb-ink-3); }
.cb-sens b { display: block; font-family: var(--cb-mono); font-size: 14px; color: var(--cb-ink); }

.cb-formula { margin-top: 12px; padding: 13px 15px; border: 1px dashed var(--cb-line); border-radius: 8px; background: var(--cb-bg); font-family: var(--cb-mono); font-size: 12px; line-height: 2; color: var(--cb-ink-2); overflow-x: auto; }
.cb-notes { display: grid; gap: 10px; margin-top: 14px; }
.cb-notes > div { padding: 12px 14px; border-radius: 8px; background: var(--cb-bg); border-left: 3px solid var(--cb-violet); font-size: 13px; color: var(--cb-ink-2); }
.cb-notes b { color: var(--cb-ink); }

.cb-faq details { border-bottom: 1px solid var(--cb-line-2); }
.cb-faq details:last-child { border-bottom: 0; }
.cb-faq summary { position: relative; list-style: none; cursor: pointer; padding: 12px 30px 12px 0; font-size: 14.5px; font-weight: 600; }
.cb-faq summary::-webkit-details-marker { display: none; }
.cb-faq summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font-family: var(--cb-mono); font-size: 18px; color: var(--cb-violet); transition: transform .2s ease; }
.cb-faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.cb-faq p { margin: 0; padding: 0 8px 14px 0; font-size: 13.5px; line-height: 1.95; color: var(--cb-ink-2); }

/* ---------- 侧栏 ---------- */
.cb-rail { position: sticky; top: 24px; display: grid; gap: 14px; }
.cb-rail-card { background: var(--cb-card); border: 1px solid var(--cb-line); border-radius: 12px; padding: 18px; }
.cb-rail-card h3 { margin: 0 0 10px; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--cb-ink-3); font-weight: 700; }
.cb-rail-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.cb-rail-list li { display: flex; justify-content: space-between; gap: 10px; font-size: 12.5px; color: var(--cb-ink-2); }
.cb-rail-list b { font-family: var(--cb-mono); color: var(--cb-ink); }
.cb-links { display: grid; gap: 8px; }
.cb-links a { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 11px; border: 1px solid var(--cb-line); border-radius: 8px; font-size: 13px; color: var(--cb-ink-2); transition: all .16s ease; }
.cb-links a:hover { border-color: var(--cb-violet); color: var(--cb-violet); background: var(--cb-violet-soft); }
.cb-links a::after { content: "→"; font-family: var(--cb-mono); opacity: .5; }
.cb-rail-note { margin: 0; font-size: 12px; line-height: 1.8; color: var(--cb-ink-3); }

@media (max-width: 1020px) {
    .cb-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
    .cb-body { grid-template-columns: minmax(0, 1fr); }
    .cb-rail { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cb-fixed { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
    .cb-wrap { width: calc(100% - 28px); }
    .cb-hero { padding-top: 18px; padding-bottom: 38px; }
    .cb-intro h1 { font-size: 31px; }
    .cb-lede { font-size: 14px; }
    .cb-editor-body { padding: 14px 14px 16px; }
    .cb-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .cb-card { padding: 20px 16px; }
    .cb-fixed { grid-template-columns: 1fr 1fr; }
    .cb-fixed-stats { grid-template-columns: minmax(0, 1fr); }
    .cb-rail { grid-template-columns: minmax(0, 1fr); }
    .cb-preview { flex-wrap: wrap; }
    .cb-preview-side { text-align: left; }
}