/* ============================================================
   UI KIT 2026 · 工具页新设计系统层
   作用：为重新设计的工具页提供统一排版层级、色彩令牌与组件骨架。
   原则：所有规则限定在 .uk-* 作用域内，不影响任何既有页面；
        颜色/字体由各工具页在 .uk-root 上覆盖，保证每页视觉独立。
   ============================================================ */

.uk-root {
    /* 字体层级（行高与字距按阅读阻力调优） */
    --u-fs-2xs: 11.5px;
    --u-fs-xs: 12.5px;
    --u-fs-sm: 13.5px;
    --u-fs-base: 15px;
    --u-fs-md: 16px;
    --u-fs-lg: 19px;
    --u-fs-xl: 24px;
    --u-fs-2xl: clamp(26px, 3.4vw, 36px);
    --u-lh-tight: 1.35;
    --u-lh-body: 1.78;
    --u-lh-loose: 1.9;
    --u-ls-tight: -0.01em;

    /* 间距 */
    --u-gap-xs: 6px;
    --u-gap-sm: 10px;
    --u-gap: 16px;
    --u-gap-lg: 24px;
    --u-gap-xl: 34px;
    --u-pad-panel: 22px;

    /* 中性色（浅色） */
    --u-bg: #f6f7f9;
    --u-surface: #ffffff;
    --u-surface-2: #f2f4f7;
    --u-line: #e3e7ee;
    --u-line-strong: #cfd6e2;
    --u-ink: #16202e;
    --u-ink-2: #46536a;
    --u-ink-3: #7b8798;

    /* 主色（各页覆盖） */
    --u-accent: #2f6df6;
    --u-accent-2: #1b4fbd;
    --u-accent-soft: #eaf1ff;
    --u-accent-ink: #ffffff;

    /* 语义色 */
    --u-good: #14805e;
    --u-good-soft: #e6f6ef;
    --u-warn: #b26a00;
    --u-warn-soft: #fff3e0;
    --u-bad: #c0392f;
    --u-bad-soft: #fdecea;

    /* 形状与投影 */
    --u-r-sm: 8px;
    --u-r: 14px;
    --u-r-lg: 20px;
    --u-shadow-1: 0 1px 2px rgba(18, 28, 45, .05), 0 6px 18px rgba(18, 28, 45, .06);
    --u-shadow-2: 0 2px 6px rgba(18, 28, 45, .07), 0 18px 44px rgba(18, 28, 45, .1);

    --u-mono: "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
    --u-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    color: var(--u-ink);
    font-family: var(--u-sans);
    font-size: var(--u-fs-base);
    line-height: var(--u-lh-body);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

:root[data-theme="dark"] .uk-root {
    --u-bg: #0e131b;
    --u-surface: #161d28;
    --u-surface-2: #1d2634;
    --u-line: #2a3444;
    --u-line-strong: #3a4658;
    --u-ink: #e8edf5;
    --u-ink-2: #a7b3c4;
    --u-ink-3: #7c8899;
    --u-accent-soft: #16233c;
    --u-good: #4ec99a;
    --u-good-soft: #122a22;
    --u-warn: #e5a445;
    --u-warn-soft: #2c2214;
    --u-bad: #f08a7d;
    --u-bad-soft: #2c1a18;
    --u-shadow-1: 0 1px 2px rgba(0, 0, 0, .4);
    --u-shadow-2: 0 2px 8px rgba(0, 0, 0, .45), 0 18px 44px rgba(0, 0, 0, .4);
}

.uk-root *, .uk-root *::before, .uk-root *::after { box-sizing: border-box; }
.uk-root p { margin: 0 0 12px; line-height: var(--u-lh-body); }
.uk-root h1, .uk-root h2, .uk-root h3, .uk-root h4 {
    margin: 0; line-height: var(--u-lh-tight);
    letter-spacing: var(--u-ls-tight); font-weight: 700; color: var(--u-ink);
}
.uk-root strong, .uk-root b { font-weight: 700; color: var(--u-ink); }
.uk-root a { color: var(--u-accent); text-decoration: none; }
.uk-root a:hover { text-decoration: underline; }
.uk-root .uk-kw { font-weight: 700; color: var(--u-accent-2); }
:root[data-theme="dark"] .uk-root .uk-kw { color: color-mix(in srgb, var(--u-accent) 70%, #fff); }

/* ---------- 版心与面板 ---------- */
.uk-shell { max-width: 1180px; margin: 0 auto; padding: 22px 24px 90px; }
.uk-panel {
    background: var(--u-surface); border: 1px solid var(--u-line);
    border-radius: var(--u-r-lg); padding: var(--u-pad-panel);
    box-shadow: var(--u-shadow-1); margin-bottom: var(--u-gap-lg);
}
.uk-panel--flush { padding: 0; overflow: hidden; }
.uk-panel__head {
    display: flex; align-items: baseline; justify-content: space-between;
    gap: 12px; flex-wrap: wrap; margin-bottom: 16px;
}
.uk-panel__title { font-size: var(--u-fs-lg); font-weight: 700; }
.uk-panel__desc { font-size: var(--u-fs-sm); color: var(--u-ink-3); margin: 0; }
.uk-panel__hint {
    font-size: var(--u-fs-xs); color: var(--u-ink-3);
    background: var(--u-surface-2); border-radius: 999px; padding: 3px 10px;
}

/* ---------- 面包屑 ---------- */
.uk-crumb { margin-bottom: 18px; font-size: var(--u-fs-xs); color: var(--u-ink-3); }
.uk-crumb a { color: var(--u-ink-2); }
.uk-crumb a:hover { color: var(--u-accent); }
.uk-crumb .sep { margin: 0 7px; opacity: .45; }
.uk-crumb .current { color: var(--u-ink); font-weight: 600; }

/* ---------- 首屏 Hero ---------- */
.uk-hero { margin-bottom: var(--u-gap-lg); }
.uk-hero__kicker {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: var(--u-fs-xs); font-weight: 700; letter-spacing: .08em;
    color: var(--u-accent-2); background: var(--u-accent-soft);
    border-radius: 999px; padding: 5px 12px; margin-bottom: 14px;
}
.uk-hero__title { font-size: var(--u-fs-2xl); margin-bottom: 12px; }
.uk-hero__lead {
    font-size: var(--u-fs-md); line-height: 1.72; color: var(--u-ink-2);
    max-width: 62ch; margin-bottom: 18px;
}
.uk-hero__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.uk-hero__tag {
    font-size: var(--u-fs-xs); color: var(--u-ink-2);
    background: var(--u-surface); border: 1px solid var(--u-line);
    border-radius: 999px; padding: 5px 11px;
}
.uk-hero__acts { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* ---------- 按钮 ---------- */
.uk-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    height: 40px; padding: 0 18px; border-radius: 10px;
    border: 1px solid transparent; cursor: pointer;
    font-family: inherit; font-size: var(--u-fs-sm); font-weight: 600;
    transition: transform .12s ease, box-shadow .16s ease, background .16s ease;
    user-select: none;
}
.uk-btn:active { transform: translateY(1px); }
.uk-btn:focus-visible { outline: 2px solid var(--u-accent); outline-offset: 2px; }
.uk-btn--primary { background: var(--u-accent); color: var(--u-accent-ink); box-shadow: 0 6px 16px color-mix(in srgb, var(--u-accent) 26%, transparent); }
.uk-btn--primary:hover { background: var(--u-accent-2); }
.uk-btn--ghost { background: var(--u-surface); color: var(--u-ink); border-color: var(--u-line-strong); }
.uk-btn--ghost:hover { border-color: var(--u-accent); color: var(--u-accent); }
.uk-btn--soft { background: var(--u-accent-soft); color: var(--u-accent-2); }
.uk-btn--sm { height: 32px; padding: 0 12px; font-size: var(--u-fs-xs); border-radius: 8px; }

/* ---------- KPI ---------- */
.uk-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin-bottom: var(--u-gap-lg); }
.uk-kpi {
    background: var(--u-surface); border: 1px solid var(--u-line);
    border-radius: var(--u-r); padding: 16px 18px; box-shadow: var(--u-shadow-1);
    position: relative; overflow: hidden;
}
.uk-kpi::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--u-line-strong); }
.uk-kpi--main::before { background: var(--u-accent); }
.uk-kpi--good::before { background: var(--u-good); }
.uk-kpi--warn::before { background: var(--u-warn); }
.uk-kpi__label { font-size: var(--u-fs-xs); color: var(--u-ink-3); margin-bottom: 6px; }
.uk-kpi__value {
    font-family: var(--u-mono); font-size: clamp(20px, 2.3vw, 27px); font-weight: 700;
    letter-spacing: -.02em; color: var(--u-ink); line-height: 1.2; word-break: break-all;
}
.uk-kpi__unit { font-size: var(--u-fs-sm); font-weight: 600; color: var(--u-ink-3); margin-left: 3px; }
.uk-kpi__sub { font-size: var(--u-fs-xs); color: var(--u-ink-3); margin-top: 6px; line-height: 1.6; }

/* ---------- 表单 ---------- */
.uk-grid { display: grid; gap: 14px; }
.uk-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.uk-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.uk-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.uk-grid--6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.uk-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.uk-field__label { font-size: var(--u-fs-sm); font-weight: 600; color: var(--u-ink-2); }
.uk-field__label .req { color: var(--u-bad); margin-left: 2px; }
.uk-field__unit { font-weight: 500; color: var(--u-ink-3); font-size: var(--u-fs-xs); }
.uk-input, .uk-select, .uk-textarea {
    width: 100%; height: 40px; padding: 0 12px;
    border: 1px solid var(--u-line-strong); border-radius: 10px;
    background: var(--u-surface); color: var(--u-ink);
    font-family: inherit; font-size: var(--u-fs-sm);
    transition: border-color .15s ease, box-shadow .15s ease;
}
.uk-textarea { height: auto; min-height: 92px; padding: 10px 12px; line-height: 1.7; resize: vertical; }
.uk-input:focus, .uk-select:focus, .uk-textarea:focus {
    outline: none; border-color: var(--u-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--u-accent) 18%, transparent);
}
.uk-input.is-bad, .uk-select.is-bad { border-color: var(--u-bad); }
.uk-input--num { font-family: var(--u-mono); }
.uk-check { display: inline-flex; align-items: center; gap: 7px; font-size: var(--u-fs-sm); color: var(--u-ink-2); cursor: pointer; }
.uk-check input { width: 15px; height: 15px; accent-color: var(--u-accent); }

/* ---------- 提示条 ---------- */
.uk-alert {
    display: flex; gap: 10px; align-items: flex-start;
    border-radius: var(--u-r); padding: 12px 14px; margin-bottom: 14px;
    font-size: var(--u-fs-sm); line-height: 1.7;
}
.uk-alert--err { background: var(--u-bad-soft); color: var(--u-bad); border: 1px solid color-mix(in srgb, var(--u-bad) 26%, transparent); }
.uk-alert--ok { background: var(--u-good-soft); color: var(--u-good); border: 1px solid color-mix(in srgb, var(--u-good) 26%, transparent); }
.uk-alert--tip { background: var(--u-accent-soft); color: var(--u-accent-2); border: 1px solid color-mix(in srgb, var(--u-accent) 22%, transparent); }
.uk-alert[hidden] { display: none; }

/* ---------- 表格 ---------- */
.uk-table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.uk-table { width: 100%; border-collapse: collapse; font-size: var(--u-fs-sm); min-width: 560px; }
.uk-table th, .uk-table td { padding: 10px 12px; border-bottom: 1px solid var(--u-line); text-align: left; vertical-align: middle; }
.uk-table thead th {
    background: var(--u-surface-2); color: var(--u-ink-3);
    font-size: var(--u-fs-xs); font-weight: 700; letter-spacing: .04em;
    white-space: nowrap; position: sticky; top: 0; z-index: 1;
}
.uk-table tbody tr:hover { background: var(--u-surface-2); }
.uk-table tbody tr.is-best { background: color-mix(in srgb, var(--u-good) 10%, transparent); }
.uk-table .num { font-family: var(--u-mono); text-align: right; white-space: nowrap; }
.uk-table .act { width: 46px; text-align: center; }
.uk-table .act button {
    border: none; background: transparent; color: var(--u-ink-3);
    cursor: pointer; font-size: 15px; line-height: 1; padding: 4px 6px; border-radius: 6px;
}
.uk-table .act button:hover { color: var(--u-bad); background: var(--u-bad-soft); }

.uk-tag {
    display: inline-flex; align-items: center; height: 22px; padding: 0 9px;
    border-radius: 999px; font-size: var(--u-fs-2xs); font-weight: 700;
    background: var(--u-surface-2); color: var(--u-ink-2);
}
.uk-tag--best { background: var(--u-good-soft); color: var(--u-good); }
.uk-tag--warn { background: var(--u-warn-soft); color: var(--u-warn); }
.uk-tag--bad { background: var(--u-bad-soft); color: var(--u-bad); }

/* ---------- 结论 / 建议 ---------- */
.uk-notes { display: grid; gap: 10px; }
.uk-note {
    display: flex; gap: 11px; align-items: flex-start;
    background: var(--u-surface-2); border-radius: var(--u-r);
    padding: 13px 15px; font-size: var(--u-fs-sm); line-height: 1.75;
    border: 1px solid var(--u-line);
}
.uk-note__idx {
    flex: 0 0 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
    background: var(--u-accent); color: var(--u-accent-ink);
    font-size: var(--u-fs-xs); font-weight: 700; font-family: var(--u-mono);
}
.uk-note__idx--good { background: var(--u-good); }
.uk-note__idx--warn { background: var(--u-warn); }

/* ---------- 转义预览 ---------- */
.uk-pre {
    background: var(--u-surface-2); border: 1px solid var(--u-line);
    border-radius: var(--u-r-sm); padding: 12px 14px;
    font-family: var(--u-mono); font-size: var(--u-fs-xs); line-height: 1.8;
    white-space: pre-wrap; word-break: break-all; color: var(--u-ink-2);
    max-height: 260px; overflow: auto; margin: 0;
}
.uk-pre b { color: var(--u-accent-2); }

/* ---------- FAQ ---------- */
.uk-faq { display: grid; gap: 10px; }
.uk-faq__item { border: 1px solid var(--u-line); border-radius: var(--u-r); background: var(--u-surface); overflow: hidden; }
.uk-faq__q {
    width: 100%; text-align: left; background: transparent; border: none; cursor: pointer;
    padding: 14px 16px; font-family: inherit; font-size: var(--u-fs-base); font-weight: 600;
    color: var(--u-ink); display: flex; justify-content: space-between; gap: 12px; align-items: center;
}
.uk-faq__q::after { content: "+"; color: var(--u-ink-3); font-size: 19px; line-height: 1; }
.uk-faq__item.is-open .uk-faq__q::after { content: "\2212"; }
.uk-faq__a { display: none; padding: 0 16px 15px; font-size: var(--u-fs-sm); color: var(--u-ink-2); line-height: var(--u-lh-loose); }
.uk-faq__item.is-open .uk-faq__a { display: block; }
.uk-faq__a[hidden] { display: none; }

/* ---------- 相关工具 ---------- */
.uk-rel { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.uk-rel__item {
    display: block; background: var(--u-surface); border: 1px solid var(--u-line);
    border-radius: var(--u-r); padding: 14px 16px; color: var(--u-ink);
    transition: border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.uk-rel__item:hover { text-decoration: none; border-color: var(--u-accent); transform: translateY(-2px); box-shadow: var(--u-shadow-2); }
.uk-rel__name { font-size: var(--u-fs-base); font-weight: 700; margin-bottom: 4px; }
.uk-rel__desc { font-size: var(--u-fs-xs); color: var(--u-ink-3); line-height: 1.65; }

/* ---------- Toast（仅用户操作后出现，禁止加载即弹） ---------- */
.uk-toast {
    position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 12px);
    background: var(--u-ink); color: var(--u-surface);
    font-size: var(--u-fs-sm); font-weight: 600; padding: 11px 20px;
    border-radius: 999px; z-index: 9999; opacity: 0; pointer-events: none;
    transition: opacity .2s ease, transform .2s ease; box-shadow: var(--u-shadow-2);
    max-width: 88vw; text-align: center;
}
.uk-toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 打印稿 ---------- */
.uk-sheet { display: none; }
.uk-print-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
    .uk-grid--4, .uk-grid--6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .uk-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
    .uk-shell { padding: 16px 14px 72px; }
    .uk-panel { padding: 16px 14px; border-radius: var(--u-r); }
    .uk-grid--2, .uk-grid--3, .uk-grid--4, .uk-grid--6 { grid-template-columns: minmax(0, 1fr); }
    .uk-hero__title { font-size: 26px; }
    .uk-hero__lead { font-size: var(--u-fs-base); }
    .uk-kpis { grid-template-columns: minmax(0, 1fr); gap: 10px; }
    .uk-btn { height: 42px; }
    .uk-table { font-size: var(--u-fs-xs); }
}

@media print {
    .nav-header, .footer, .back-to-top, #navEvadeBtn, .nav-evade-btn,
    #evadeFab, .evade-fab, #navMask, .nav-mask, .ma-page-modal,
    #clicaptcha-container, #ai-captcha-holder, .uk-print-hide { display: none !important; }
    body { background: #fff; }
    .uk-root { --u-surface: #fff; --u-surface-2: #fff; --u-line: #999; --u-ink: #000; --u-ink-2: #333; }
    .uk-sheet { display: block !important; }
    .uk-shell { padding: 0; }
}