/* ==========================================================================
   考证投入回本周期计算器
   设计语言：资格证书 + 烫金边框 + 回本标尺
   作用域：.cr-page（变量 cr- 前缀）
   ========================================================================== */

.cr-page {
    --cr-paper: #f8f4e9;
    --cr-bg: #f2eee2;
    --cr-card: #fffdf7;
    --cr-ink: #1b2436;
    --cr-ink-2: #4d5568;
    --cr-ink-3: #857f70;
    --cr-line: #e0d8c4;
    --cr-line-2: #ece6d6;
    --cr-navy: #172741;
    --cr-navy-2: #24395c;
    --cr-bronze: #a67c3d;
    --cr-bronze-2: #c9a25c;
    --cr-bronze-soft: #f3e9d5;
    --cr-teal: #2a7f72;
    --cr-teal-soft: #e4f1ec;
    --cr-red: #a63d32;
    --cr-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
    --cr-serif: "Songti SC", "SimSun", Georgia, "Times New Roman", serif;

    background:
        radial-gradient(640px 320px at 8% -6%, rgba(166, 124, 61, .12), transparent 62%),
        radial-gradient(560px 300px at 96% 2%, rgba(42, 127, 114, .09), transparent 60%),
        var(--cr-bg);
    color: var(--cr-ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.78;
    -webkit-font-smoothing: antialiased;
}

:root[data-theme="dark"] .cr-page {
    --cr-paper: #14161d;
    --cr-bg: #0e1016;
    --cr-card: #171a23;
    --cr-ink: #ece6d8;
    --cr-ink-2: #b3ac9c;
    --cr-ink-3: #7f7969;
    --cr-line: #2b2f3c;
    --cr-line-2: #21252f;
    --cr-navy: #0c1220;
    --cr-navy-2: #16233a;
    --cr-bronze: #d3a462;
    --cr-bronze-2: #e6c088;
    --cr-bronze-soft: #2b2417;
    --cr-teal: #5dbdab;
    --cr-teal-soft: #142a27;
    --cr-red: #e08a78;
    background:
        radial-gradient(640px 320px at 8% -6%, rgba(211, 164, 98, .08), transparent 62%),
        radial-gradient(560px 300px at 96% 2%, rgba(93, 189, 171, .06), transparent 60%),
        var(--cr-bg);
}

.cr-page *, .cr-page *::before, .cr-page *::after { box-sizing: border-box; }
.cr-wrap { width: min(1150px, calc(100% - 40px)); margin: 0 auto; }
.cr-page a { color: inherit; text-decoration: none; }

/* ---------- 首屏 ---------- */
.cr-hero {
    position: relative;
    overflow: hidden;
    padding: 26px 0 54px;
    background:
        radial-gradient(700px 340px at 92% -10%, rgba(201, 162, 92, .22), transparent 62%),
        linear-gradient(180deg, #faf6ea 0%, #f4efe0 76%, transparent 100%);
    border-bottom: 1px solid var(--cr-line);
}

.cr-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(72deg, rgba(166, 124, 61, .08) 0 1px, transparent 1px 9px),
        repeating-linear-gradient(-72deg, rgba(42, 127, 114, .06) 0 1px, transparent 1px 11px);
    mask-image: radial-gradient(700px 420px at 24% 20%, #000, transparent 76%);
    pointer-events: none;
}

:root[data-theme="dark"] .cr-hero {
    background:
        radial-gradient(700px 340px at 92% -10%, rgba(211, 164, 98, .12), transparent 62%),
        linear-gradient(180deg, #14161d 0%, #101218 78%, transparent 100%);
}

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

.cr-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.cr-crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--cr-ink-3); }
.cr-crumb a:hover { color: var(--cr-bronze); }
.cr-crumb i { font-style: normal; opacity: .5; }
.cr-crumb b { color: var(--cr-ink); font-weight: 600; }

.cr-modes { display: inline-flex; padding: 3px; border: 1px solid var(--cr-line); border-radius: 3px; background: rgba(255, 255, 255, .6); }
.cr-modes button { border: 0; background: transparent; color: var(--cr-ink-2); font: inherit; font-size: 12.5px; padding: 6px 12px; border-radius: 2px; cursor: pointer; transition: all .18s ease; }
.cr-modes button.is-on { background: var(--cr-navy); color: #f8f4e9; font-weight: 600; }
:root[data-theme="dark"] .cr-modes { background: rgba(255, 255, 255, .04); }
:root[data-theme="dark"] .cr-modes button.is-on { background: var(--cr-bronze); color: #171a23; }

.cr-hero-grid { display: grid; grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr); gap: 42px; align-items: start; }

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

.cr-intro h1 { margin: 0 0 16px; font-family: var(--cr-serif); font-size: clamp(32px, 3.8vw, 48px); line-height: 1.24; font-weight: 700; letter-spacing: -.01em; color: var(--cr-navy); }
:root[data-theme="dark"] .cr-intro h1 { color: var(--cr-ink); }
.cr-intro h1 em { font-style: normal; color: var(--cr-bronze); border-bottom: 3px double var(--cr-bronze-2); }

.cr-lede { margin: 0 0 20px; max-width: 33em; font-size: 15px; line-height: 1.95; color: var(--cr-ink-2); }
.cr-lede strong { color: var(--cr-ink); font-weight: 700; }

.cr-chips { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 8px; }
.cr-chips li { display: flex; gap: 10px; align-items: baseline; font-size: 13.5px; color: var(--cr-ink-2); }
.cr-chips b { flex: none; min-width: 34px; text-align: center; padding: 1px 6px; border: 1px solid var(--cr-line); border-radius: 2px; background: var(--cr-paper); color: var(--cr-bronze); font-size: 11.5px; letter-spacing: .06em; }

.cr-presets { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.cr-presets > span { font-size: 12.5px; color: var(--cr-ink-3); }
.cr-presets button { font: inherit; font-size: 12.5px; padding: 7px 12px; border: 1px solid var(--cr-line); border-radius: 3px; background: var(--cr-card); color: var(--cr-ink-2); cursor: pointer; transition: all .16s ease; }
.cr-presets button:hover { border-color: var(--cr-bronze); color: var(--cr-bronze); }
.cr-presets button.is-on { border-color: var(--cr-bronze); background: var(--cr-bronze-soft); color: var(--cr-bronze); font-weight: 600; }

/* ---------- 证书卡 ---------- */
.cr-cert {
    position: relative;
    padding: 7px;
    border-radius: 3px;
    background: linear-gradient(150deg, var(--cr-bronze-2), #e8d3a8 42%, var(--cr-bronze));
    box-shadow: 0 30px 60px -44px rgba(23, 39, 65, .7);
}

.cr-cert-inner {
    position: relative;
    border: 1px solid rgba(23, 39, 65, .12);
    border-radius: 2px;
    background: var(--cr-card);
    padding: 18px 20px 18px;
    box-shadow: inset 0 0 0 6px rgba(255, 255, 255, .7), inset 0 0 0 7px rgba(166, 124, 61, .22);
}

:root[data-theme="dark"] .cr-cert-inner { box-shadow: inset 0 0 0 6px rgba(0, 0, 0, .18), inset 0 0 0 7px rgba(211, 164, 98, .22); }

.cr-cert-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--cr-line); }
.cr-cert-org { font-family: var(--cr-mono); font-size: 9px; letter-spacing: .18em; color: var(--cr-bronze); }
.cr-cert-head h2 { margin: 4px 0 0; font-family: var(--cr-serif); font-size: 19px; letter-spacing: .02em; color: var(--cr-navy); }
:root[data-theme="dark"] .cr-cert-head h2 { color: var(--cr-ink); }

.cr-seal {
    flex: none;
    width: 52px; height: 52px;
    display: grid; place-items: center;
    border: 2px solid rgba(166, 61, 50, .55);
    border-radius: 50%;
    color: rgba(166, 61, 50, .78);
    font-family: var(--cr-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    transform: rotate(-9deg);
    box-shadow: inset 0 0 0 2px rgba(166, 61, 50, .18);
}
:root[data-theme="dark"] .cr-seal { border-color: rgba(224, 138, 120, .6); color: rgba(224, 138, 120, .9); }

.cr-cert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; padding: 12px 0; }

.cr-field { display: grid; gap: 3px; min-width: 0; }
.cr-field > span { font-size: 11px; color: var(--cr-ink-3); }
.cr-field .cr-input { display: flex; align-items: center; gap: 5px; padding: 0 8px; border: 1px solid var(--cr-line); border-radius: 3px; background: #faf7ee; transition: border-color .16s ease, box-shadow .16s ease; }
:root[data-theme="dark"] .cr-field .cr-input { background: #12141b; border-color: #2b2f3c; }
.cr-field .cr-input:focus-within { border-color: var(--cr-bronze); box-shadow: 0 0 0 3px rgba(166, 124, 61, .14); }
.cr-field input { width: 100%; min-width: 0; border: 0; outline: none; background: transparent; color: #1b2436; font: inherit; font-family: var(--cr-mono); font-size: 13.5px; padding: 7px 0; font-variant-numeric: tabular-nums; }
.cr-page .cr-field .cr-input input { background: transparent; color: #1b2436; -webkit-text-fill-color: #1b2436; }
:root[data-theme="dark"] .cr-field .cr-input input { color: #ece6d8; -webkit-text-fill-color: #ece6d8; }
.cr-field .cr-input em { flex: none; font-style: normal; font-size: 10.5px; color: var(--cr-ink-3); }

.cr-cert-result { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; padding-top: 12px; border-top: 1px solid var(--cr-line); }
.cr-cert-main > span { display: block; font-size: 11.5px; color: var(--cr-ink-3); }
.cr-cert-main b { display: flex; align-items: baseline; gap: 4px; font-family: var(--cr-serif); font-size: clamp(32px, 4vw, 42px); font-weight: 700; line-height: 1.1; color: var(--cr-navy); font-variant-numeric: tabular-nums; }
:root[data-theme="dark"] .cr-cert-main b { color: var(--cr-ink); }
.cr-cert-main small { font-family: var(--cr-mono); font-size: 12px; color: var(--cr-ink-3); }
.cr-cert-side { display: grid; gap: 5px; text-align: right; font-size: 11px; color: var(--cr-ink-3); }
.cr-cert-side b { display: block; font-family: var(--cr-mono); font-size: 13.5px; color: var(--cr-ink); }
.cr-cert-side b span { font: inherit; color: inherit; }

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

/* ---------- 正文 ---------- */
.cr-body { display: grid; grid-template-columns: minmax(0, 1fr) 292px; gap: 30px; padding: 38px 0 30px; align-items: start; }
.cr-main { display: grid; gap: 20px; min-width: 0; }
.cr-main > * { min-width: 0; }
.cr-card { background: var(--cr-card); border: 1px solid var(--cr-line); border-radius: 4px; padding: 24px 26px; box-shadow: 0 20px 44px -46px rgba(23, 39, 65, .5); }
.cr-card-head { margin-bottom: 12px; }
.cr-card-head h2 { margin: 0; font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cr-card-head h2 i { display: inline-grid; place-items: center; width: 26px; height: 24px; border: 1px solid var(--cr-bronze); border-radius: 2px; color: var(--cr-bronze); font-style: normal; font-family: var(--cr-mono); font-size: 11px; }
.cr-card-head p { margin: 7px 0 0; font-size: 13px; color: var(--cr-ink-3); }

.cr-cost-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; margin-top: 14px; }
.cr-cost-list { border: 1px solid var(--cr-line); border-radius: 4px; padding: 2px 14px; }
.cr-cost-row { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--cr-line); font-size: 13px; color: var(--cr-ink-2); }
.cr-cost-row b { font-family: var(--cr-mono); color: var(--cr-ink); }
.cr-cost-row.is-time b { color: var(--cr-bronze); }
.cr-cost-total { display: flex; justify-content: space-between; gap: 10px; margin: 4px -14px 0; padding: 11px 14px; background: var(--cr-navy); color: #f8f4e9; font-size: 13px; border-radius: 0 0 3px 3px; }
.cr-cost-total b { font-family: var(--cr-mono); font-size: 18px; }

.cr-ruler-box h3 { margin: 0 0 10px; font-size: 12px; letter-spacing: .06em; color: var(--cr-ink-3); font-weight: 600; }
.cr-ruler { position: relative; height: 12px; margin-top: 30px; border-radius: 2px; background: var(--cr-line-2); border: 1px solid var(--cr-line); }
.cr-ruler-fill { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: linear-gradient(90deg, var(--cr-bronze-2), var(--cr-bronze)); transition: width .4s ease; }
.cr-ruler-mark { position: absolute; top: -26px; left: 0; transform: translateX(-50%); transition: left .4s ease; white-space: nowrap; }
.cr-ruler-mark b { display: inline-block; padding: 1px 6px; border-radius: 2px; background: var(--cr-navy); color: #fff; font-family: var(--cr-mono); font-size: 10.5px; font-weight: 600; }
.cr-ruler-mark::after { content: ""; position: absolute; left: 50%; bottom: -7px; margin-left: -3px; border: 3px solid transparent; border-top-color: var(--cr-navy); }
.cr-ruler-ticks { display: flex; justify-content: space-between; margin-top: 6px; font-family: var(--cr-mono); font-size: 10px; color: var(--cr-ink-3); }
.cr-ruler-note { margin: 10px 0 0; font-size: 11.5px; line-height: 1.7; color: var(--cr-ink-3); }

.cr-gain-box { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.cr-gain-box > div { border: 1px solid var(--cr-line); border-radius: 3px; padding: 9px 10px; }
.cr-gain-box > div > span { display: block; font-size: 10.5px; color: var(--cr-ink-3); }
.cr-gain-box b { display: block; margin-top: 2px; font-family: var(--cr-mono); font-size: 14px; font-variant-numeric: tabular-nums; }
.cr-gain-box b span { display: inline; font: inherit; color: inherit; }

.cr-table-wrap { margin-top: 14px; overflow-x: auto; border: 1px solid var(--cr-line); border-radius: 4px; }
.cr-table { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 13px; }
.cr-table th, .cr-table td { padding: 10px 12px; text-align: right; border-bottom: 1px solid var(--cr-line-2); white-space: nowrap; }
.cr-table th { background: var(--cr-paper); color: var(--cr-ink-2); font-size: 12px; font-weight: 600; }
.cr-table th:first-child, .cr-table td:first-child { text-align: left; }
.cr-table td { font-family: var(--cr-mono); font-variant-numeric: tabular-nums; }
.cr-table tbody tr:last-child td { border-bottom: 0; }
.cr-table tr.is-on { background: var(--cr-bronze-soft); }
.cr-table tr.is-on td { color: var(--cr-bronze); font-weight: 700; }
.cr-table tr.is-bad td:last-child { color: var(--cr-red); }

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

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

/* ---------- 侧栏 ---------- */
.cr-rail { position: sticky; top: 24px; display: grid; gap: 14px; }
.cr-rail-card { background: var(--cr-card); border: 1px solid var(--cr-line); border-radius: 4px; padding: 18px; }
.cr-rail-card h3 { margin: 0 0 10px; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--cr-ink-3); font-weight: 700; }
.cr-rail-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.cr-rail-list li { display: flex; justify-content: space-between; gap: 10px; font-size: 12.5px; color: var(--cr-ink-2); }
.cr-rail-list b { font-family: var(--cr-mono); color: var(--cr-ink); }
.cr-links { display: grid; gap: 8px; }
.cr-links a { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 11px; border: 1px solid var(--cr-line); border-radius: 3px; font-size: 13px; color: var(--cr-ink-2); transition: all .16s ease; }
.cr-links a:hover { border-color: var(--cr-bronze); color: var(--cr-bronze); background: var(--cr-bronze-soft); }
.cr-links a::after { content: "→"; font-family: var(--cr-mono); opacity: .5; }
.cr-rail-note { margin: 0; font-size: 12px; line-height: 1.8; color: var(--cr-ink-3); }

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

@media (max-width: 700px) {
    .cr-wrap { width: calc(100% - 28px); }
    .cr-hero { padding-top: 18px; padding-bottom: 38px; }
    .cr-intro h1 { font-size: 30px; }
    .cr-lede { font-size: 14px; }
    .cr-cert-inner { padding: 14px 14px 16px; }
    .cr-cert-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .cr-card { padding: 20px 16px; }
    .cr-gain-box { grid-template-columns: 1fr; }
    .cr-rail { grid-template-columns: minmax(0, 1fr); }
    .cr-cert-result { flex-wrap: wrap; }
    .cr-cert-side { text-align: left; }
    .cr-ruler-mark { top: -24px; }
}