/* ============================================================
   jc-doc.css
   「简单文档」(lcbk_doc for emlog) 前台样式
   配色：使用 CSS 变量，支持浅色 / 深色两套主题（html[data-theme]）
   ============================================================ */

:root {
    --jc-bg: #f5f7fb;
    --jc-surface: #ffffff;
    --jc-soft-1: #f7f9fd;
    --jc-soft-2: #fafbfe;
    --jc-soft-3: #f6f8ff;
    --jc-border: #e6eaf2;
    --jc-border-strong: #c9d4f5;
    --jc-border-soft: #cfd8ee;
    --jc-accent-border: #d7e0ff;
    --jc-text: #2b3340;
    --jc-ink: #333c4b;
    --jc-ink-2: #57627a;
    --jc-text-muted: #7a8699;
    --jc-faint: #a2adc0;
    --jc-accent: #3561ff;
    --jc-accent-dark: #2547cf;
    --jc-accent-soft: #eef2ff;
    --jc-code-bg: #f3f5f9;
    --jc-code-border: #e9edf5;
    --jc-code-text: #d6336c;
    --jc-pre-bg: #232a38;
    --jc-pre-text: #e7ecf5;
    --jc-header-bg: rgba(255, 255, 255, .92);
    --jc-hero-bg: linear-gradient(160deg, #eef2ff 0%, #f8faff 55%, #f5f7fb 100%);
    --jc-shadow: 0 1px 2px rgba(22, 41, 92, .05), 0 4px 18px rgba(22, 41, 92, .06);
    --jc-shadow-hover: 0 6px 24px rgba(22, 41, 92, .12);
    --jc-radius: 10px;
    --jc-toc-width: 256px;
}

[data-theme="dark"] {
    --jc-bg: #0e1420;
    --jc-surface: #161e2c;
    --jc-soft-1: #1b2536;
    --jc-soft-2: #182130;
    --jc-soft-3: #1d2943;
    --jc-border: #2a3550;
    --jc-border-strong: #40508a;
    --jc-border-soft: #35426a;
    --jc-accent-border: #3a4a80;
    --jc-text: #e6ebf5;
    --jc-ink: #c7d1e1;
    --jc-ink-2: #a2aec4;
    --jc-text-muted: #8b97ac;
    --jc-faint: #5d6a80;
    --jc-accent: #7c98ff;
    --jc-accent-dark: #9db3ff;
    --jc-accent-soft: #1d2a4a;
    --jc-code-bg: #202a44;
    --jc-code-border: #303c5c;
    --jc-code-text: #ff8ab3;
    --jc-pre-bg: #0a0f1b;
    --jc-pre-text: #dce4f0;
    --jc-header-bg: rgba(22, 30, 46, .9);
    --jc-hero-bg: linear-gradient(160deg, #18233f 0%, #131b2d 55%, #0f1522 100%);
    --jc-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 18px rgba(0, 0, 0, .32);
    --jc-shadow-hover: 0 6px 24px rgba(0, 0, 0, .42);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --jc-bg: #0e1420;
        --jc-surface: #161e2c;
        --jc-soft-1: #1b2536;
        --jc-soft-2: #182130;
        --jc-soft-3: #1d2943;
        --jc-border: #2a3550;
        --jc-border-strong: #40508a;
        --jc-border-soft: #35426a;
        --jc-accent-border: #3a4a80;
        --jc-text: #e6ebf5;
        --jc-ink: #c7d1e1;
        --jc-ink-2: #a2aec4;
        --jc-text-muted: #8b97ac;
        --jc-faint: #5d6a80;
        --jc-accent: #7c98ff;
        --jc-accent-dark: #9db3ff;
        --jc-accent-soft: #1d2a4a;
        --jc-code-bg: #202a44;
        --jc-code-border: #303c5c;
        --jc-code-text: #ff8ab3;
        --jc-pre-bg: #0a0f1b;
        --jc-pre-text: #dce4f0;
        --jc-header-bg: rgba(22, 30, 46, .9);
        --jc-hero-bg: linear-gradient(160deg, #18233f 0%, #131b2d 55%, #0f1522 100%);
        --jc-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 18px rgba(0, 0, 0, .32);
        --jc-shadow-hover: 0 6px 24px rgba(0, 0, 0, .42);
    }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--jc-bg);
    color: var(--jc-text);
    font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--jc-accent); text-decoration: none; }
a:hover { color: var(--jc-accent-dark); text-decoration: none; }

img { max-width: 100%; }

.jc-skip {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--jc-accent);
    color: #fff;
    padding: 8px 14px;
    z-index: 99;
    border-radius: 0 0 8px 0;
}
.jc-skip:focus { left: 0; }

/* ---------- 顶栏 ---------- */
.jc-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--jc-header-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--jc-border);
}

.jc-header-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.jc-header-right { display: flex; align-items: center; gap: 18px; }

.jc-brand {
    font-size: 19px;
    font-weight: 700;
    color: var(--jc-text);
    letter-spacing: .5px;
}
.jc-brand:hover { color: var(--jc-accent); }

.jc-nav { display: flex; gap: 22px; align-items: center; font-size: 15px; }
.jc-nav a { color: var(--jc-text-muted); position: relative; padding: 4px 0; }
.jc-nav a:hover { color: var(--jc-accent); }
.jc-nav a.is-active {
    color: var(--jc-accent);
    font-weight: 600;
}
.jc-nav a.is-active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 2px;
    border-radius: 2px;
    background: var(--jc-accent);
}

/* 主题切换按钮 */
.jc-theme {
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--jc-border);
    border-radius: 9px;
    background: var(--jc-surface);
    color: var(--jc-text-muted);
    cursor: pointer;
    transition: color .15s ease, border-color .15s ease;
    padding: 0;
}
.jc-theme:hover { color: var(--jc-accent); border-color: var(--jc-accent-border); }
.jc-theme svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.jc-theme .jc-ico-sun { display: none; }
[data-theme="dark"] .jc-theme .jc-ico-moon { display: none; }
[data-theme="dark"] .jc-theme .jc-ico-sun { display: block; }

/* ---------- 主区 ---------- */
.jc-main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 30px 20px;
    min-height: calc(100vh - 220px);
}
.jc-main--narrow { max-width: 1180px; }

/* ---------- 首页 Hero ---------- */
.jc-hero {
    text-align: center;
    padding: 58px 20px 46px;
    background: var(--jc-hero-bg);
    border: 1px solid var(--jc-border);
    border-radius: 16px;
    margin-bottom: 34px;
}

.jc-hero-title { margin: 0 0 10px; font-size: 34px; line-height: 1.3; }
.jc-hero-subtitle { margin: 0 auto 14px; max-width: 640px; color: var(--jc-accent); font-size: 18px; font-weight: 500; }
.jc-hero-intro { margin: 0 auto; max-width: 700px; color: var(--jc-text-muted); font-size: 15px; }

/* ---------- 文档卡片列表 ---------- */
.jc-docs { margin-top: 6px; }

.jc-docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.jc-card {
    background: var(--jc-surface);
    border: 1px solid var(--jc-border);
    border-radius: var(--jc-radius);
    padding: 20px 20px 16px;
    box-shadow: var(--jc-shadow);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    display: flex;
    flex-direction: column;
}

.jc-card:hover { transform: translateY(-3px); box-shadow: var(--jc-shadow-hover); border-color: var(--jc-border-strong); }

.jc-card-title { margin: 0 0 8px; font-size: 18px; line-height: 1.4; }
.jc-card-title a { color: var(--jc-text); }
.jc-card-title a:hover { color: var(--jc-accent); }

.jc-card-text {
    margin: 0 0 12px;
    color: var(--jc-text-muted);
    font-size: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.jc-card-meta { font-size: 12.5px; color: var(--jc-faint); border-top: 1px dashed var(--jc-border); padding-top: 10px; }

/* ---------- 面包屑 + 返回列表 ---------- */
.jc-doc-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin: 0 0 18px;
}

.jc-breadcrumb { font-size: 13.5px; color: var(--jc-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.jc-breadcrumb a { color: var(--jc-text-muted); }
.jc-breadcrumb a:hover { color: var(--jc-accent); }
.jc-breadcrumb-sep { margin: 0 8px; color: var(--jc-faint); }

.jc-doc-listlink {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--jc-text-muted);
    border: 1px solid var(--jc-border);
    background: var(--jc-surface);
    padding: 5px 13px;
    border-radius: 8px;
    line-height: 1.4;
    transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.jc-doc-listlink:hover { color: var(--jc-accent); border-color: var(--jc-accent-border); background: var(--jc-soft-3); }

/* ---------- 文档详情布局 ---------- */
.jc-doc-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
}
.jc-doc-layout.is-toc { grid-template-columns: minmax(0, 1fr) var(--jc-toc-width); }

.jc-doc-article {
    background: var(--jc-surface);
    border: 1px solid var(--jc-border);
    border-radius: 14px;
    padding: 36px 44px;
    box-shadow: var(--jc-shadow);
    min-width: 0;
}

.jc-doc-header { border-bottom: 1px solid var(--jc-border); padding-bottom: 20px; margin-bottom: 24px; }
.jc-doc-title { margin: 0 0 10px; font-size: 30px; line-height: 1.35; word-break: break-word; }
.jc-doc-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--jc-text-muted); font-size: 13px; }
.jc-doc-abstract {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--jc-soft-2);
    border-left: 3px solid var(--jc-accent);
    border-radius: 6px;
    color: var(--jc-ink-2);
    font-size: 14.5px;
}

/* ---------- Markdown 正文排版 ---------- */
.jc-md > *:first-child { margin-top: 0; }

.jc-md {
    font-size: 15.5px;
    line-height: 1.85;
    color: var(--jc-ink);
    overflow-wrap: break-word;
}

.jc-md h1, .jc-md h2, .jc-md h3, .jc-md h4, .jc-md h5, .jc-md h6 {
    color: var(--jc-text);
    line-height: 1.4;
    margin: 1.7em 0 .7em;
    scroll-margin-top: 84px;
    font-weight: 700;
}

.jc-md h1 { font-size: 25px; border-bottom: 1px solid var(--jc-border); padding-bottom: 10px; }
.jc-md h2 {
    font-size: 21px;
    padding: 4px 0 4px 12px;
    border-left: 4px solid var(--jc-accent);
    border-radius: 6px;
    background: linear-gradient(90deg, var(--jc-accent-soft), transparent);
}
.jc-md h3 { font-size: 18px; }
.jc-md h4 { font-size: 16px; }

.jc-md p { margin: .85em 0; }
.jc-md a { text-decoration: underline; text-underline-offset: 3px; }
.jc-md a:hover { text-decoration: underline; }

.jc-md ul, .jc-md ol { margin: .9em 0; padding-left: 1.6em; }
.jc-md li { margin: .3em 0; }
.jc-md li > ul, .jc-md li > ol { margin: .2em 0; }

.jc-md blockquote {
    margin: 1.1em 0;
    padding: 6px 18px;
    border-left: 4px solid var(--jc-border-soft);
    color: var(--jc-ink-2);
    background: var(--jc-soft-1);
    border-radius: 6px;
}
.jc-md blockquote p { margin: .4em 0; }

.jc-md code {
    font-family: "SFMono-Regular", Consolas, Menlo, monospace;
    background: var(--jc-code-bg);
    border: 1px solid var(--jc-code-border);
    border-radius: 5px;
    padding: .12em .42em;
    font-size: 88%;
    color: var(--jc-code-text);
}

.jc-md pre {
    margin: 1.15em 0;
    background: var(--jc-pre-bg);
    color: var(--jc-pre-text);
    border: 1px solid var(--jc-border);
    border-radius: 9px;
    padding: 16px 18px;
    overflow-x: auto;
    line-height: 1.6;
    font-size: 13.5px;
}
.jc-md pre code {
    background: transparent;
    border: 0;
    padding: 0;
    color: inherit;
    font-size: inherit;
    display: block;
}

.jc-md table {
    display: block;
    width: 100%;
    overflow: auto;
    word-break: normal;
    word-break: keep-all;
    border-collapse: collapse;
    margin: 1.1em 0;
    font-size: 14px;
}

.jc-md th, .jc-md td {
    border: 1px solid var(--jc-border);
    padding: 8px 12px;
    text-align: left;
}
.jc-md th { background: var(--jc-soft-1); font-weight: 600; }
.jc-md tr:nth-child(even) td { background: var(--jc-soft-2); }

.jc-md hr { border: 0; border-top: 1px solid var(--jc-border); margin: 1.6em 0; }
.jc-md img { border-radius: 8px; }

.jc-md .jc-h2 { cursor: default; }

/* ---------- TOC ---------- */
.jc-toc-toggle { display: none; }

.jc-doc-toc { min-width: 0; }
.jc-doc-toc-inner {
    position: sticky;
    top: 84px;
    background: var(--jc-surface);
    border: 1px solid var(--jc-border);
    border-radius: var(--jc-radius);
    box-shadow: var(--jc-shadow);
    padding: 16px 16px 12px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.jc-doc-toc-title { font-size: 13px; color: var(--jc-text-muted); letter-spacing: 1px; padding: 0 4px 8px; border-bottom: 1px solid var(--jc-border); margin-bottom: 8px; }

.jc-doc-toc-nav ul { list-style: none; margin: 0; padding: 0; }
.jc-doc-toc-nav li { margin: 1px 0; }

.jc-doc-toc-link {
    display: block;
    padding: 5px 10px;
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--jc-ink-2);
    border-left: 2px solid transparent;
    border-radius: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.jc-doc-toc-link:hover { color: var(--jc-accent); background: var(--jc-soft-3); }
.jc-doc-toc-link.is-active { color: var(--jc-accent); background: var(--jc-accent-soft); border-left-color: var(--jc-accent); font-weight: 600; }

/* ---------- 附件下载 ---------- */
.jc-attach { margin-top: 40px; border-top: 1px solid var(--jc-border); padding-top: 22px; }
.jc-attach-title { font-size: 19px; margin: 0 0 14px; }

.jc-attach-list { list-style: none; margin: 0; padding: 0; }
.jc-attach-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 14px;
    border: 1px solid var(--jc-border);
    border-radius: 10px;
    background: var(--jc-soft-2);
    margin-bottom: 10px;
    transition: border-color .15s ease, background .15s ease;
}
.jc-attach-item:hover { border-color: var(--jc-border-strong); background: var(--jc-surface); }

.jc-attach-ico {
    flex: 0 0 auto;
    width: 46px;
    height: 46px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--jc-accent);
    background: var(--jc-accent-soft);
    border: 1px solid var(--jc-accent-border);
    letter-spacing: .5px;
}

.jc-attach-info { flex: 1; min-width: 0; }
.jc-attach-name { font-size: 15px; color: var(--jc-text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.jc-attach-meta { font-size: 12.5px; color: var(--jc-text-muted); margin-top: 2px; }

.jc-btn {
    display: inline-block;
    background: var(--jc-accent);
    color: #fff;
    font-size: 14px;
    line-height: 1;
    padding: 10px 18px;
    border-radius: 8px;
    border: 1px solid var(--jc-accent);
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease;
}
.jc-btn:hover { background: var(--jc-accent-dark); border-color: var(--jc-accent-dark); color: #fff; }

/* ---------- 文档底部（上一篇 / 下一篇） ---------- */
.jc-doc-bottom { margin-top: 40px; border-top: 1px dashed var(--jc-border); padding-top: 22px; }

.jc-doc-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.jc-doc-pager--next { grid-column: 2; text-align: right; }

.jc-doc-pager-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
    padding: 12px 16px;
    border: 1px solid var(--jc-border);
    border-radius: 10px;
    background: var(--jc-soft-2);
    text-decoration: none;
    transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.jc-doc-pager-link:hover { border-color: var(--jc-border-strong); background: var(--jc-soft-3); box-shadow: var(--jc-shadow); }
.jc-doc-pager-dir { font-size: 12.5px; color: var(--jc-text-muted); }
.jc-doc-pager-title { font-size: 15px; font-weight: 600; color: var(--jc-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.jc-doc-pager-link:hover .jc-doc-pager-title { color: var(--jc-accent); }

/* ---------- 返回顶部 ---------- */
.jc-top {
    position: fixed;
    right: 22px;
    bottom: 24px;
    z-index: 60;
    width: 42px;
    height: 42px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--jc-accent-border);
    background: var(--jc-surface);
    color: var(--jc-accent);
    box-shadow: var(--jc-shadow);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s, color .15s ease, background .15s ease, border-color .15s ease;
}
.jc-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.jc-top:hover { color: #fff; background: var(--jc-accent); border-color: var(--jc-accent); }
.jc-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- 空状态 / 404 ---------- */
.jc-empty { text-align: center; padding: 80px 20px; color: var(--jc-text-muted); }
.jc-empty p { margin: 6px 0; }
.jc-empty-tip { font-size: 13px; }
.jc-empty--404 { padding: 60px 20px; }
.jc-404-code { font-size: 72px; font-weight: 800; color: var(--jc-border-soft); line-height: 1; margin-bottom: 8px; }

/* ---------- 页脚 ---------- */
.jc-footer { border-top: 1px solid var(--jc-border); background: var(--jc-surface); }
.jc-footer-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 6px 16px;
    font-size: 14px;
    color: var(--jc-text-muted);
}
.jc-footer-copy { font-size: 12.5px; color: var(--jc-faint); }
.jc-footer-copy a { color: var(--jc-faint); }
.jc-footer-copy a:hover { color: var(--jc-accent); }

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
    .jc-doc-layout.is-toc { grid-template-columns: minmax(0, 1fr); }
    .jc-doc-toc { display: none; }
    .jc-doc-toc.is-open { display: block; }

    .jc-toc-toggle {
        display: inline-block;
        margin: 0 0 14px;
        padding: 6px 14px;
        font-size: 13px;
        color: var(--jc-accent);
        background: var(--jc-accent-soft);
        border: 1px solid var(--jc-accent-border);
        border-radius: 7px;
        cursor: pointer;
    }
    .jc-toc-toggle:hover { background: var(--jc-soft-3); }
}

@media (max-width: 640px) {
    .jc-main { padding: 20px 14px 40px; }
    .jc-hero { padding: 36px 16px 28px; border-radius: 12px; }
    .jc-hero-title { font-size: 26px; }
    .jc-doc-article { padding: 22px 18px; border-radius: 10px; }
    .jc-doc-title { font-size: 23px; }
    .jc-md { font-size: 15px; }
    .jc-attach-item { flex-wrap: wrap; }
    .jc-footer-inner { justify-content: center; text-align: center; }
    .jc-header-right { gap: 12px; }
    .jc-nav { gap: 14px; font-size: 14px; }
    .jc-nav a.is-active::after { bottom: -6px; }
    .jc-doc-pager { grid-template-columns: 1fr; }
    .jc-doc-pager--next { grid-column: auto; }
    .jc-top { right: 14px; bottom: 16px; width: 38px; height: 38px; }
    .jc-breadcrumb { white-space: normal; }
}