/* ==========================================================
   轻文档 · 全局样式（前台 + 安装页 + 登录页通用）
   风格：清爽的飞书文档式排版
   ========================================================== */

:root {
    --color-primary: #3370FF;
    --color-primary-hover: #245BDB;
    --color-primary-light: #E8F0FF;
    --color-text: #1F2329;
    --color-text-secondary: #646A73;
    --color-text-placeholder: #8F959E;
    --color-border: #DEE0E3;
    --color-bg-page: #F5F6F7;
    --color-bg-card: #FFFFFF;
    --color-success: #34C724;
    --color-success-bg: #E8FBE8;
    --color-danger: #F54A45;
    --color-danger-hover: #D93025;
    --radius-card: 12px;
    --radius-control: 8px;
    --shadow-card: 0 2px 8px rgba(31, 35, 41, .06);
    --shadow-card-hover: 0 6px 20px rgba(31, 35, 41, .10);
    --max-width-list: 960px;
    --max-width-reading: 800px;
    --transition: .2s ease;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text);
    background-color: var(--color-bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-hover);
}

img {
    max-width: 100%;
}

.container {
    max-width: var(--max-width-list);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}

.site-logo:hover {
    color: var(--color-primary);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.site-nav a {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.site-nav a:hover {
    color: var(--color-primary);
}

/* ---------- 面包屑导航 ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: var(--max-width-reading);
    margin: 0 auto 16px;
    padding: 0 8px;
    font-size: 13px;
    color: var(--color-text-placeholder);
}

.breadcrumb-link {
    color: var(--color-text-secondary);
}

.breadcrumb-link:hover {
    color: var(--color-primary);
}

.breadcrumb-current {
    color: var(--color-text-placeholder);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 280px;
}

/* ---------- 首页列表 ---------- */
.page-list {
    padding-top: 40px;
    padding-bottom: 64px;
}

.page-heading {
    margin-bottom: 24px;
}

.page-heading h1 {
    margin: 0 0 6px;
    font-size: 26px;
    font-weight: 600;
}

.page-heading p {
    margin: 0;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.article-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.article-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-card);
    padding: 24px;
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
    transition: transform var(--transition), box-shadow var(--transition),
        border-color var(--transition);
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-border);
}

.article-card-title {
    margin: 0 0 8px;
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
}

.article-card-title a {
    color: var(--color-text);
}

.article-card-title a:hover {
    color: var(--color-primary);
}

.article-card-excerpt {
    margin: 0 0 14px;
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.article-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-placeholder);
}

.meta-more {
    color: var(--color-primary);
    font-weight: 500;
}

/* ---------- 文章阅读页 ---------- */
.page-article {
    padding: 40px 20px 64px;
}

.article-detail {
    max-width: var(--max-width-reading);
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 48px 56px;
}

.article-detail-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.article-detail-header h1 {
    margin: 0 0 12px;
    font-size: 30px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
}

.article-detail-meta {
    font-size: 14px;
    color: var(--color-text-placeholder);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.meta-dot {
    color: var(--color-border);
}

.article-back {
    max-width: var(--max-width-reading);
    margin: 16px auto 0;
    padding: 0 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-dot {
    color: var(--color-border);
}

.back-link {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.back-link:hover {
    color: var(--color-primary);
}

.empty-content-hint {
    color: var(--color-text-placeholder);
}

/* ---------- 富文本正文排版（WangEditor 产出内容） ---------- */
.article-content {
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text);
    word-break: break-word;
    overflow-wrap: break-word;
}

.article-content > *:first-child {
    margin-top: 0;
}

.article-content > *:last-child {
    margin-bottom: 0;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5 {
    margin: 1.6em 0 .6em;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
}

.article-content h1 { font-size: 26px; }
.article-content h2 { font-size: 22px; }
.article-content h3 { font-size: 19px; }
.article-content h4 { font-size: 17px; }
.article-content h5 { font-size: 16px; }

.article-content p {
    margin: 0 0 1em;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1em;
    padding-left: 1.8em;
}

.article-content li {
    margin: .35em 0;
}

.article-content blockquote {
    margin: 1em 0;
    padding: 12px 16px;
    border-left: 4px solid var(--color-primary);
    background: var(--color-bg-page);
    border-radius: 0 var(--radius-control) var(--radius-control) 0;
    color: var(--color-text-secondary);
}

.article-content code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: .88em;
    background: #F2F3F5;
    color: #D83931;
    padding: 2px 6px;
    border-radius: 4px;
}

.article-content pre {
    margin: 0 0 1em;
    padding: 16px 18px;
    background: #2B2F36;
    border-radius: var(--radius-control);
    overflow-x: auto;
    line-height: 1.6;
}

.article-content pre code {
    background: none;
    color: #E6E8EB;
    padding: 0;
    font-size: 14px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-control);
    margin: 8px 0;
    display: block;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1em;
    font-size: 15px;
    display: block;
    overflow-x: auto;
}

.article-content th,
.article-content td {
    border: 1px solid var(--color-border);
    padding: 8px 12px;
    text-align: left;
}

.article-content th {
    background: var(--color-bg-page);
    font-weight: 600;
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 24px 0;
}

/* ---------- 通用控件 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 36px;
    padding: 0 18px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-control);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: #fff;
}

.btn-secondary {
    background: #fff;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
    color: #fff;
}

.btn-sm {
    height: 30px;
    padding: 0 12px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

/* ---------- 提示/空状态 ---------- */
.alert {
    border-radius: var(--radius-card);
    padding: 20px 24px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert strong {
    display: block;
    margin-bottom: 6px;
    font-size: 15px;
}

.alert ul {
    margin: 8px 0 0;
    padding-left: 20px;
}

.alert-error {
    background: #FEF0F0;
    border: 1px solid #FBC4C4;
    color: #8C1D18;
}

.alert-error a {
    color: var(--color-danger);
    font-weight: 500;
}

.alert-success {
    background: var(--color-success-bg);
    border: 1px solid #B7ECB7;
    color: #1D6B15;
}

.alert-tip {
    margin: 6px 0 0;
    font-size: 13px;
    opacity: .85;
}

.empty-state {
    background: var(--color-bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 72px 24px;
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.empty-state p {
    margin: 0 0 20px;
}

.not-found-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 24px;
    color: var(--color-text);
}

/* ---------- 安装页 ---------- */
.install-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.install-card {
    width: 100%;
    max-width: 520px;
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 36px;
}

.install-card h1 {
    margin: 0 0 20px;
    font-size: 22px;
    font-weight: 600;
}

.install-actions {
    display: flex;
    gap: 12px;
    margin: 20px 0 0;
}

.install-warning {
    margin: 20px 0 0;
    padding: 12px 14px;
    font-size: 13px;
    color: #8C1D18;
    background: #FEF0F0;
    border-radius: var(--radius-control);
}

/* ---------- 登录页 ---------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 36px 32px;
}

.login-card h1 {
    margin: 0 0 6px;
    font-size: 22px;
    font-weight: 600;
    text-align: center;
}

.login-subtitle {
    margin: 0 0 28px;
    text-align: center;
    font-size: 14px;
    color: var(--color-text-placeholder);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.form-control {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    font-size: 15px;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-control);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(51, 112, 255, .12);
}

textarea.form-control {
    height: auto;
    padding: 10px 12px;
}

.form-error {
    margin: 0 0 16px;
    padding: 10px 14px;
    font-size: 13px;
    color: #8C1D18;
    background: #FEF0F0;
    border-radius: var(--radius-control);
}

/* ---------- 页脚 ---------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    background: #fff;
    padding: 20px 0;
    text-align: center;
}

.site-footer p {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-placeholder);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    body {
        font-size: 15px;
    }

    .container,
    .page-article {
        padding-left: 16px;
        padding-right: 16px;
    }

    .page-list {
        padding-top: 24px;
    }

    .page-heading h1 {
        font-size: 22px;
    }

    .article-card {
        padding: 20px;
    }

    .article-card-title {
        font-size: 18px;
    }

    .article-card-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .article-detail {
        padding: 28px 20px;
        border-radius: var(--radius-card);
    }

    .article-detail-header h1 {
        font-size: 23px;
    }

    .site-nav {
        gap: 16px;
    }
}