/* ==========================================================================
   YwxApp 文档中心前台样式
   三栏布局：左侧目录树 / 中间正文 / 右侧本页锚点
   ========================================================================== */

:root {
    --dc-primary: #2f6fed;
    --dc-primary-soft: #eaf1ff;
    --dc-text: #24292f;
    --dc-text-sub: #656d76;
    --dc-border: #e6e8eb;
    --dc-bg: #ffffff;
    --dc-bg-soft: #f7f8fa;
    --dc-code-bg: #f6f8fa;
    --dc-header-h: 60px;
    --dc-sidebar-w: 268px;
    --dc-toc-w: 220px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--dc-bg);
    color: var(--dc-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--dc-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------- 顶部导航 ---------------------------- */
.dc-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--dc-header-h);
    background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--dc-border);
}

.dc-header-inner {
    max-width: 1440px;
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.dc-logo { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.dc-logo:hover { text-decoration: none; }

.dc-logo-mark {
    width: 30px; height: 30px;
    border-radius: 7px;
    background: linear-gradient(135deg, #2f6fed, #6c47ff);
    color: #fff;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}

.dc-logo-text { font-size: 16px; font-weight: 600; color: var(--dc-text); }

.dc-nav { display: flex; align-items: center; gap: 20px; flex: 1; overflow: hidden; }
.dc-nav a { color: var(--dc-text-sub); font-size: 14px; white-space: nowrap; }
.dc-nav a:hover { color: var(--dc-primary); text-decoration: none; }

.dc-search { position: relative; flex-shrink: 0; }
.dc-search input {
    width: 210px; height: 34px;
    padding: 0 34px 0 12px;
    border: 1px solid var(--dc-border);
    border-radius: 17px;
    background: var(--dc-bg-soft);
    font-size: 13px;
    outline: none;
    transition: all .2s;
}
.dc-search input:focus {
    width: 250px;
    border-color: var(--dc-primary);
    background: #fff;
}
.dc-search button {
    position: absolute; right: 4px; top: 3px;
    width: 28px; height: 28px;
    border: none; background: none;
    color: var(--dc-text-sub);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}

.dc-menu-toggle {
    display: none;
    width: 34px; height: 34px;
    border: 1px solid var(--dc-border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.dc-menu-toggle span { display: block; width: 16px; height: 2px; background: var(--dc-text); }

/* ---------------------------- 三栏骨架 ---------------------------- */
.dc-layout {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: var(--dc-sidebar-w) minmax(0, 1fr) var(--dc-toc-w);
    gap: 36px;
    align-items: start;
}

/* ---------------------------- 左侧目录 ---------------------------- */
.dc-sidebar {
    position: sticky;
    top: var(--dc-header-h);
    max-height: calc(100vh - var(--dc-header-h));
    overflow-y: auto;
    padding: 22px 8px 40px 0;
    border-right: 1px solid var(--dc-border);
}

.dc-sidebar::-webkit-scrollbar { width: 6px; }
.dc-sidebar::-webkit-scrollbar-thumb { background: #d8dce1; border-radius: 3px; }

.dc-sidebar-head { padding: 0 10px 14px; border-bottom: 1px solid var(--dc-border); margin-bottom: 12px; }
.dc-project-title { font-size: 15px; font-weight: 600; margin-bottom: 8px; }

.dc-version-select {
    width: 100%; height: 30px;
    padding: 0 8px;
    border: 1px solid var(--dc-border);
    border-radius: 6px;
    background: var(--dc-bg-soft);
    font-size: 13px;
    outline: none;
    cursor: pointer;
}

.dc-tree ul { list-style: none; margin: 0; padding: 0; }
.dc-tree > ul > li > .dc-tree-item > .dc-tree-link { font-weight: 600; color: var(--dc-text); }
.dc-tree ul ul { padding-left: 14px; display: none; }
.dc-tree li.is-open > ul { display: block; }

.dc-tree-item {
    display: flex; align-items: center;
    border-radius: 6px;
    margin: 1px 0;
    transition: background .15s;
}
.dc-tree-item:hover { background: var(--dc-bg-soft); }
.dc-tree-item.is-active { background: var(--dc-primary-soft); }
.dc-tree-item.is-active > .dc-tree-link { color: var(--dc-primary); font-weight: 600; }

.dc-tree-toggle {
    width: 18px; height: 28px;
    flex-shrink: 0;
    cursor: pointer;
    position: relative;
}
.dc-tree-toggle::before {
    content: '';
    position: absolute;
    left: 6px; top: 11px;
    width: 5px; height: 5px;
    border-right: 1.5px solid var(--dc-text-sub);
    border-bottom: 1.5px solid var(--dc-text-sub);
    transform: rotate(-45deg);
    transition: transform .18s;
}
li.is-open > .dc-tree-item > .dc-tree-toggle::before { transform: rotate(45deg); }

.dc-tree-link {
    flex: 1;
    padding: 5px 10px 5px 4px;
    font-size: 14px;
    color: var(--dc-text-sub);
    line-height: 1.5;
    word-break: break-word;
}
.dc-tree-link:hover { color: var(--dc-primary); text-decoration: none; }
.dc-tree-link.is-dir { cursor: pointer; color: var(--dc-text); font-weight: 500; }

/* 没有折叠箭头的节点需要补齐缩进，保持文字左对齐 */
.dc-tree-item > .dc-tree-link:first-child { padding-left: 22px; }

/* ---------------------------- 中间正文 ---------------------------- */
.dc-main { min-width: 0; padding: 22px 0 60px; }

.dc-crumbs { font-size: 13px; color: var(--dc-text-sub); margin-bottom: 18px; }
.dc-crumb-sep { margin: 0 7px; color: #c9ced4; }
.dc-crumb-current { color: var(--dc-text); }

.dc-article-title {
    font-size: 30px;
    line-height: 1.35;
    margin: 0 0 12px;
    font-weight: 650;
    letter-spacing: -.3px;
}

.dc-article-meta { font-size: 13px; color: var(--dc-text-sub); padding-bottom: 18px; border-bottom: 1px solid var(--dc-border); }
.dc-dot { margin: 0 8px; }

/* 正文排版 */
.dc-content { padding-top: 22px; }
.dc-content h2 {
    font-size: 22px;
    margin: 34px 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--dc-border);
    scroll-margin-top: calc(var(--dc-header-h) + 16px);
}
.dc-content h3 {
    font-size: 18px;
    margin: 26px 0 12px;
    scroll-margin-top: calc(var(--dc-header-h) + 16px);
}
.dc-content h4 { font-size: 16px; margin: 20px 0 10px; }
.dc-content p { margin: 0 0 15px; }
.dc-content ul, .dc-content ol { margin: 0 0 15px; padding-left: 26px; }
.dc-content li { margin: 5px 0; }
.dc-content img { max-width: 100%; border-radius: 6px; }

.dc-content blockquote {
    margin: 0 0 15px;
    padding: 10px 16px;
    border-left: 4px solid var(--dc-primary);
    background: var(--dc-primary-soft);
    border-radius: 0 6px 6px 0;
    color: var(--dc-text-sub);
}
.dc-content blockquote p:last-child { margin-bottom: 0; }

.dc-content code {
    padding: 2px 6px;
    background: var(--dc-code-bg);
    border-radius: 4px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 13px;
    color: #d63384;
}

.dc-content pre {
    position: relative;
    margin: 0 0 18px;
    padding: 16px;
    background: #1f2430;
    border-radius: 8px;
    overflow-x: auto;
}
.dc-content pre code {
    padding: 0;
    background: none;
    color: #e6e6e6;
    font-size: 13px;
    line-height: 1.65;
}

.dc-copy-btn {
    position: absolute;
    top: 8px; right: 8px;
    padding: 3px 10px;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 5px;
    background: rgba(255, 255, 255, .08);
    color: #cfd4dc;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity .18s;
}
.dc-content pre:hover .dc-copy-btn { opacity: 1; }
.dc-copy-btn:hover { background: rgba(255, 255, 255, .18); color: #fff; }
.dc-copy-btn.is-done { color: #7ee2a8; border-color: rgba(126, 226, 168, .4); }

.dc-content table {
    width: 100%;
    margin: 0 0 18px;
    border-collapse: collapse;
    font-size: 14px;
}
.dc-content th, .dc-content td { padding: 9px 12px; border: 1px solid var(--dc-border); text-align: left; }
.dc-content th { background: var(--dc-bg-soft); font-weight: 600; }
.dc-content tr:nth-child(even) td { background: #fbfcfd; }

.dc-content hr { margin: 28px 0; border: none; border-top: 1px solid var(--dc-border); }

/* 上下篇 */
.dc-pager { display: flex; gap: 16px; margin-top: 44px; }
.dc-pager-item {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--dc-border);
    border-radius: 8px;
    transition: all .18s;
    min-height: 66px;
}
a.dc-pager-item:hover { border-color: var(--dc-primary); background: var(--dc-primary-soft); text-decoration: none; }
.dc-pager-item.is-disabled { border: none; background: none; }
.dc-pager-next { text-align: right; }
.dc-pager-label { display: block; font-size: 12px; color: var(--dc-text-sub); margin-bottom: 4px; }
.dc-pager-title { display: block; font-size: 14px; font-weight: 500; color: var(--dc-text); }

/* ---------------------------- 右侧锚点 ---------------------------- */
.dc-toc {
    position: sticky;
    top: var(--dc-header-h);
    max-height: calc(100vh - var(--dc-header-h));
    overflow-y: auto;
    padding: 30px 0 40px;
}

.dc-toc-title { font-size: 12px; font-weight: 600; color: var(--dc-text-sub); letter-spacing: .5px; text-transform: uppercase; margin-bottom: 10px; }

.dc-toc-list { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--dc-border); }
.dc-toc-list li a {
    display: block;
    padding: 4px 0 4px 12px;
    margin-left: -2px;
    border-left: 2px solid transparent;
    font-size: 13px;
    color: var(--dc-text-sub);
    line-height: 1.5;
}
.dc-toc-list li a:hover { color: var(--dc-primary); text-decoration: none; }
.dc-toc-list li a.is-active { color: var(--dc-primary); border-left-color: var(--dc-primary); font-weight: 500; }
.dc-toc-h3 a { padding-left: 24px !important; font-size: 12.5px; }

/* ---------------------------- 首页 ---------------------------- */
.dc-hero {
    padding: 66px 24px 54px;
    background: linear-gradient(160deg, #f4f7ff 0%, #ffffff 100%);
    border-bottom: 1px solid var(--dc-border);
    text-align: center;
}
.dc-hero-inner { max-width: 720px; margin: 0 auto; }
.dc-hero h1 { font-size: 36px; margin: 0 0 12px; font-weight: 700; letter-spacing: -.5px; }
.dc-hero p { color: var(--dc-text-sub); margin: 0 0 26px; font-size: 16px; }

.dc-hero-search { display: flex; gap: 10px; max-width: 520px; margin: 0 auto; }
.dc-hero-search input {
    flex: 1; height: 44px;
    padding: 0 16px;
    border: 1px solid var(--dc-border);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
}
.dc-hero-search input:focus { border-color: var(--dc-primary); }
.dc-hero-search button {
    height: 44px; padding: 0 26px;
    border: none; border-radius: 8px;
    background: var(--dc-primary);
    color: #fff; font-size: 15px; cursor: pointer;
}
.dc-hero-search button:hover { background: #2560d8; }

.dc-projects { max-width: 1200px; margin: 0 auto; padding: 44px 24px 60px; }
.dc-project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 20px; }

.dc-project-card {
    padding: 22px;
    border: 1px solid var(--dc-border);
    border-radius: 10px;
    background: #fff;
    transition: all .2s;
    display: flex; flex-direction: column;
}
.dc-project-card:hover { border-color: var(--dc-primary); box-shadow: 0 6px 20px rgba(47, 111, 237, .1); transform: translateY(-2px); }

.dc-project-head { display: flex; gap: 14px; margin-bottom: 14px; }
.dc-project-icon {
    width: 46px; height: 46px; flex-shrink: 0;
    border-radius: 10px;
    background: linear-gradient(135deg, #2f6fed, #6c47ff);
    color: #fff;
    font-size: 20px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.dc-project-icon img { width: 100%; height: 100%; object-fit: cover; }
.dc-project-info h2 { font-size: 17px; margin: 0 0 5px; }
.dc-project-info h2 a { color: var(--dc-text); }
.dc-project-info p { margin: 0; font-size: 13px; color: var(--dc-text-sub); line-height: 1.6; }

.dc-project-meta { display: flex; gap: 10px; align-items: center; font-size: 12px; color: var(--dc-text-sub); margin-bottom: 14px; }
.dc-tag { padding: 2px 8px; background: var(--dc-bg-soft); border-radius: 4px; }

.dc-project-recent { list-style: none; margin: 0 0 16px; padding: 12px 0 0; border-top: 1px dashed var(--dc-border); flex: 1; }
.dc-project-recent li { margin: 6px 0; font-size: 13px; }
.dc-project-recent li a { color: var(--dc-text-sub); }
.dc-project-recent li a::before { content: '›'; margin-right: 6px; color: #c9ced4; }
.dc-project-recent li a:hover { color: var(--dc-primary); text-decoration: none; }

.dc-project-enter { font-size: 13.5px; font-weight: 500; }

/* ---------------------------- 搜索页 ---------------------------- */
.dc-search-page { max-width: 820px; margin: 0 auto; padding: 40px 24px 60px; }
.dc-search-form { display: flex; gap: 10px; margin-bottom: 26px; }
.dc-search-form input { flex: 1; height: 42px; padding: 0 14px; border: 1px solid var(--dc-border); border-radius: 8px; font-size: 15px; outline: none; }
.dc-search-form input:focus { border-color: var(--dc-primary); }
.dc-search-form select { height: 42px; padding: 0 10px; border: 1px solid var(--dc-border); border-radius: 8px; background: #fff; outline: none; cursor: pointer; }
.dc-search-form button { height: 42px; padding: 0 24px; border: none; border-radius: 8px; background: var(--dc-primary); color: #fff; font-size: 15px; cursor: pointer; }

.dc-search-summary { font-size: 14px; color: var(--dc-text-sub); padding-bottom: 14px; border-bottom: 1px solid var(--dc-border); }
.dc-search-list { list-style: none; margin: 0; padding: 0; }
.dc-search-list li { padding: 18px 0; border-bottom: 1px solid var(--dc-border); }
.dc-search-title { font-size: 17px; font-weight: 600; }
.dc-search-path { font-size: 12px; color: var(--dc-text-sub); margin: 5px 0 7px; }
.dc-search-snippet { margin: 0; font-size: 14px; color: var(--dc-text-sub); line-height: 1.7; }
.dc-search-snippet mark { background: #fff3bf; color: inherit; padding: 0 2px; border-radius: 2px; }

/* ---------------------------- 空态与 404 ---------------------------- */
.dc-empty { padding: 70px 20px; text-align: center; color: var(--dc-text-sub); }
.dc-empty p { margin: 6px 0; }
.dc-empty-tip { font-size: 13px; color: #9aa1a9; }

.dc-notfound { max-width: 560px; margin: 0 auto; padding: 90px 24px; text-align: center; }
.dc-notfound-code { font-size: 84px; font-weight: 800; color: var(--dc-primary-soft); line-height: 1; }
.dc-notfound h1 { font-size: 21px; margin: 12px 0 8px; }
.dc-notfound p { color: var(--dc-text-sub); margin: 0 0 26px; }
.dc-notfound-ops { display: flex; gap: 12px; justify-content: center; }

.dc-btn { display: inline-block; padding: 9px 22px; border: 1px solid var(--dc-border); border-radius: 7px; color: var(--dc-text); font-size: 14px; }
.dc-btn:hover { text-decoration: none; border-color: var(--dc-primary); color: var(--dc-primary); }
.dc-btn-primary { background: var(--dc-primary); border-color: var(--dc-primary); color: #fff; }
.dc-btn-primary:hover { background: #2560d8; color: #fff; }

/* ---------------------------- 页脚 ---------------------------- */
.dc-footer { padding: 26px 24px; border-top: 1px solid var(--dc-border); text-align: center; color: var(--dc-text-sub); font-size: 13px; }
.dc-footer p { margin: 0; }

/* ---------------------------- 遮罩 ---------------------------- */
.dc-mask {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 98;
}
.dc-mask.is-show { display: block; }

/* ---------------------------- 响应式 ---------------------------- */
@media (max-width: 1180px) {
    .dc-layout { grid-template-columns: var(--dc-sidebar-w) minmax(0, 1fr); }
    .dc-toc { display: none; }
}

@media (max-width: 860px) {
    .dc-nav { display: none; }
    .dc-menu-toggle { display: flex; }
    .dc-search input { width: 140px; }
    .dc-search input:focus { width: 170px; }

    .dc-layout { grid-template-columns: minmax(0, 1fr); padding: 0 16px; }

    .dc-sidebar {
        position: fixed;
        top: var(--dc-header-h);
        left: 0;
        z-index: 99;
        width: 280px;
        height: calc(100vh - var(--dc-header-h));
        max-height: none;
        padding: 18px 14px 40px;
        background: #fff;
        border-right: 1px solid var(--dc-border);
        transform: translateX(-100%);
        transition: transform .25s;
    }
    .dc-sidebar.is-open { transform: translateX(0); }

    .dc-article-title { font-size: 24px; }
    .dc-pager { flex-direction: column; }
    .dc-hero h1 { font-size: 27px; }
    .dc-project-grid { grid-template-columns: 1fr; }
    .dc-search-form { flex-wrap: wrap; }
    .dc-search-form input { flex: 1 1 100%; }
}