/* ===== theme610 清洁工具库 common.css (A 骨架 sk-*) ===== */
:root {
    --color-primary: #2dd4bf;
    --color-primary-dark: #0d9488;
    --color-primary-light: #f0fdfa;
    --color-text-dark: #134e4a;
    --color-text-muted: #5b6b68;
    --color-text-light: #93a5a2;
    --color-bg-gray: #f5faf9;
    --color-border: #d9e8e5;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(13, 148, 136, 0.08);
    --shadow-md: 0 6px 18px rgba(13, 148, 136, 0.10);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ===== 基础 ===== */
body {
    font-family: var(--font-family);
    color: var(--color-text-dark);
    background: #fff;
    margin: 0;
    line-height: 1.7;
}
a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { color: var(--color-primary-dark); text-decoration: underline; }
img { max-width: 100%; }
.container { max-width: 1200px; }
.sk-container { padding: 30px 15px; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.4; }

/* A11y skip-link (A 骨架 sk-skip) */
.sk-skip, .skip-link { position: absolute; top: -50px; left: 8px; z-index: 9999; padding: 10px 18px; background: var(--color-primary); color: #fff !important; border-radius: 0 0 6px 6px; font-size: 14px; transition: top 0.2s ease-out; }
.sk-skip:focus, .skip-link:focus { top: 0; outline: 3px solid #fff; outline-offset: 1px; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 3px; }

/* ===== 顶栏（A 骨架：紧凑单行） ===== */
.sk-top {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    z-index: 100;
}
.sk-top-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.sk-logo { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.sk-logo img { height: 36px; width: auto; }
.sk-logo-text { font-size: 20px; font-weight: 800; color: var(--color-primary-dark); letter-spacing: 0.5px; }
.sk-tgl {
    display: none;
    margin-left: auto;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 20px;
    padding: 4px 10px;
    color: var(--color-primary-dark);
    cursor: pointer;
}
.sk-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
}
.sk-nav a {
    display: block;
    padding: 8px 14px;
    font-size: 15px;
    color: var(--color-text-dark);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}
.sk-nav a:hover { color: var(--color-primary-dark); text-decoration: none; background: var(--color-primary-light); }
.sk-nav a.active { color: var(--color-primary-dark); background: var(--color-primary-light); font-weight: 600; }

/* ===== 页脚（A 骨架：双列 + 版权） ===== */
.sk-foot { background: var(--color-text-dark); color: #d7e6e3; margin-top: 40px; }
.sk-foot-inner { max-width: 1200px; margin: 0 auto; padding: 40px 15px 20px; }
.sk-foot-cols { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.sk-brand { flex: 1 1 280px; min-width: 240px; }
.sk-brand .sk-logo-text { color: #fff; }
.sk-brand p { font-size: 13px; color: #9db5b1; margin: 12px 0 0; line-height: 1.8; }
.sk-links { flex: 1 1 360px; min-width: 260px; }
.sk-links h3, .sk-tags h3 { font-size: 15px; color: #fff; margin: 0 0 14px; }
.sk-links a {
    display: inline-block;
    font-size: 13px;
    color: #b8cdc9;
    margin: 0 10px 8px 0;
    padding: 3px 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 999px;
}
.sk-links a:hover { color: #fff; border-color: var(--color-primary); text-decoration: none; }
.sk-copy { margin-top: 30px; padding-top: 16px; border-top: 1px solid rgba(255, 255, 255, 0.1); font-size: 12px; color: #86a09b; text-align: center; }
.sk-copy a { color: #b8cdc9; }

/* ===== 首页 ===== */
.sk-hero {
    background: linear-gradient(135deg, var(--color-primary-light), #e0f7f1);
    border-bottom: 1px solid var(--color-border);
}
.sk-hero-inner { max-width: 1200px; margin: 0 auto; padding: 56px 15px; text-align: center; }
.sk-hero h1 { font-size: 34px; color: var(--color-text-dark); margin: 0 0 12px; }
.sk-hero p { font-size: 16px; color: var(--color-text-muted); margin: 0 0 24px; }
.sk-hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.sk-btn { display: inline-block; padding: 11px 26px; border-radius: 999px; font-size: 15px; font-weight: 600; transition: all 0.2s; }
.sk-btn-primary { background: var(--color-primary); color: #063a35 !important; }
.sk-btn-primary:hover { background: var(--color-primary-dark); color: #fff !important; text-decoration: none; }
.sk-btn-ghost { border: 1px solid var(--color-primary-dark); color: var(--color-primary-dark) !important; }
.sk-btn-ghost:hover { background: var(--color-primary-dark); color: #fff !important; text-decoration: none; }
.sk-body { max-width: 1200px; margin: 0 auto; padding: 30px 15px; display: flex; gap: 28px; align-items: flex-start; }
.sk-main { flex: 1; min-width: 0; }
.sk-aside { width: 300px; flex-shrink: 0; }
.sk-block { margin-bottom: 34px; }
.sk-block-head { display: flex; align-items: center; justify-content: space-between; border-bottom: 2px solid var(--color-primary); padding-bottom: 10px; margin-bottom: 18px; }
.sk-block-head h2 { font-size: 20px; margin: 0; }
.sk-more { font-size: 13px; color: var(--color-primary-dark); }
.sk-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

/* ===== 卡片（网格 + 横卡） ===== */
.sk-card {
    display: block;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.25s, transform 0.25s;
}
.sk-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); text-decoration: none; }
.sk-card-cover { position: relative; padding-top: 62%; background: var(--color-primary-light); overflow: hidden; }
.sk-card-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sk-card-cover > span { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 46px; }
.sk-card-body { padding: 14px 16px 16px; }
.sk-card-body h3 { font-size: 15px; margin: 0 0 6px; color: var(--color-text-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sk-card-body p { font-size: 13px; color: var(--color-text-muted); margin: 0 0 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sk-card-meta { font-size: 12px; color: var(--color-text-light); }

/* 列表页横卡（矩阵 list=horizontal） */
.sk-list { display: flex; flex-direction: column; gap: 16px; }
.sk-card-img { width: 260px; height: 170px; flex-shrink: 0; position: relative; overflow: hidden; background: var(--color-primary-light); display: block; }
.sk-card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sk-card-img > span { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 44px; }
.sk-card-info { flex: 1; min-width: 0; padding: 6px 4px; }
.sk-card-title { font-size: 17px; margin: 0 0 8px; color: var(--color-text-dark); }
.sk-card-title a:hover { color: var(--color-primary-dark); text-decoration: none; }
.sk-card-excerpt { font-size: 14px; color: var(--color-text-muted); margin: 0 0 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sk-card-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.sk-card-cat { color: var(--color-primary-dark); font-weight: 600; }

/* ===== Banner + 面包屑 ===== */
.sk-banner { background: var(--color-primary-light); border-bottom: 1px solid var(--color-border); }
.sk-banner .container { padding: 26px 15px; }
.sk-banner-title { font-size: 24px; margin: 0 0 8px; }
.sk-crumb { font-size: 13px; color: var(--color-text-muted); }
.sk-crumb a { color: var(--color-primary-dark); }
.sk-crumb i { margin: 0 6px; }

/* ===== 侧边栏 Widget ===== */
.sk-widget { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: 18px; overflow: hidden; }
.sk-widget-head { background: var(--color-primary-light); padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
.sk-widget-title { font-size: 15px; margin: 0; color: var(--color-text-dark); }
.sk-widget-body { padding: 12px 16px; }
.sk-nav-list { list-style: none; margin: 0; padding: 0; }
.sk-nav-item a { display: block; padding: 8px 10px; font-size: 14px; color: var(--color-text-dark); border-radius: var(--radius-sm); }
.sk-nav-item a:hover { background: var(--color-primary-light); text-decoration: none; color: var(--color-primary-dark); }
.sk-nav-item.active a { background: var(--color-primary-light); color: var(--color-primary-dark); font-weight: 600; }
.sk-nav-divider { border-top: 1px dashed var(--color-border); margin: 6px 0; }
.sk-nav-item.sk-nav-sub a { padding-left: 24px; font-size: 13px; color: var(--color-text-muted); }
.sk-rank-list, .sk-latest-list { list-style: none; margin: 0; padding: 0; }
.sk-rank-item { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--color-border); }
.sk-rank-item:last-child { border-bottom: none; }
.sk-rank-num { flex-shrink: 0; width: 22px; height: 22px; line-height: 22px; text-align: center; font-size: 12px; font-weight: 700; color: var(--color-text-light); background: var(--color-bg-gray); border-radius: var(--radius-sm); }
.sk-rank-num.sk-rank-top { background: var(--color-primary); color: #063a35; }
.sk-rank-content { flex: 1; min-width: 0; }
.sk-rank-title { display: block; font-size: 13px; color: var(--color-text-dark); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sk-rank-title:hover { color: var(--color-primary-dark); text-decoration: none; }
.sk-rank-meta { font-size: 12px; color: var(--color-text-light); }
.sk-latest-item { padding: 8px 0; border-bottom: 1px dashed var(--color-border); }
.sk-latest-item:last-child { border-bottom: none; }
.sk-latest-title { display: block; font-size: 13px; color: var(--color-text-dark); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sk-latest-title:hover { color: var(--color-primary-dark); text-decoration: none; }
.sk-latest-date { font-size: 12px; color: var(--color-text-light); }

/* ===== 文章详情（详情页矩阵 detail=toc → 8+4） ===== */
.sk-article { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 26px 30px; }
.sk-article-head { margin-bottom: 18px; }
.sk-article-cat { display: inline-block; background: var(--color-primary-light); color: var(--color-primary-dark); font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }
.sk-article-title { font-size: 26px; margin: 0 0 10px; }
.sk-article-meta { font-size: 13px; color: var(--color-text-light); display: flex; gap: 14px; flex-wrap: wrap; }
.sk-article-content { font-size: 15px; line-height: 1.9; color: var(--color-text-dark); margin-top: 16px; }
.sk-article-content h2 { font-size: 20px; margin: 26px 0 12px; padding-left: 12px; border-left: 4px solid var(--color-primary); }
.sk-article-content p { margin: 0 0 14px; }
.sk-article-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--color-border); }
.sk-nav-item { display: block; flex: 1; min-width: 0; padding: 12px 16px; background: var(--color-bg-gray); border-radius: var(--radius-md); }
.sk-nav-item:hover { background: var(--color-primary-light); text-decoration: none; }
.sk-nav-label { display: block; font-size: 12px; color: var(--color-text-light); margin-bottom: 4px; }
.sk-nav-title { display: block; font-size: 14px; color: var(--color-text-dark); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sk-nav-next { text-align: right; }

/* TOC 目录侧栏 */
.sk-toc .sk-toc-list { list-style: none; margin: 0; padding: 0; max-height: 320px; overflow-y: auto; }
.sk-toc .sk-toc-list li { border-bottom: 1px dashed var(--color-border); }
.sk-toc .sk-toc-list a { display: block; padding: 7px 10px; font-size: 13px; color: var(--color-text-muted); }
.sk-toc .sk-toc-list a:hover { color: var(--color-primary-dark); background: var(--color-primary-light); text-decoration: none; }

/* ===== 分页 ===== */
.sk-pagination { text-align: center; margin-top: 26px; }
.pagination { display: inline-flex; list-style: none; padding: 0; margin: 0; gap: 6px; }
.pagination li a, .pagination li span { display: inline-block; min-width: 38px; height: 38px; line-height: 36px; padding: 0 14px; border: 1px solid var(--color-border); background: #fff; text-align: center; border-radius: var(--radius-sm); color: var(--color-text-dark); }
.pagination li a:hover { border-color: var(--color-primary); color: var(--color-primary-dark); text-decoration: none; }
.pagination .active a, .pagination .active span { background: var(--color-primary); color: #063a35; border-color: var(--color-primary); font-weight: 600; }

/* ===== Article Summary（摘要模块） ===== */
.article-summary {
    --as-primary: var(--color-primary);
    --as-bg: var(--color-primary-light);
    --as-border: var(--color-border);
    --as-text: var(--color-text-dark);
    --as-muted: var(--color-text-muted);
    margin: 24px 0;
    padding: 18px 22px;
    background: var(--as-bg);
    border-left: 4px solid var(--as-primary);
    border-radius: var(--radius-sm);
}
.article-summary-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.summary-deco { color: var(--as-primary); flex-shrink: 0; }
.article-summary-title { font-size: 15px; margin: 0; color: var(--as-text); font-weight: 600; }
.article-summary-text { color: var(--as-text); font-size: 14px; line-height: 1.8; margin: 0; }

/* ===== 回顶 ===== */
#floatbtn { position: fixed; right: 22px; bottom: 26px; z-index: 99; }
#back-to-top { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: var(--color-primary); color: #063a35; border-radius: 50%; box-shadow: var(--shadow-md); transition: background 0.2s; }
#back-to-top:hover { background: var(--color-primary-dark); color: #fff; text-decoration: none; }
#back-to-top i { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; line-height: 1; }

/* ===== 卡片 padding 兜底 ===== */
.card > :where(:last-child):not(img):not(a) { padding: 15px; }

/* ===== 响应式 ===== */
@media (max-width: 991px) {
    .sk-aside { width: 260px; }
    .sk-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
    .sk-top-inner { height: 54px; }
    .sk-tgl { display: block; }
    .sk-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        align-items: stretch;
        padding: 8px 0;
        margin: 0;
    }
    .sk-nav.open { display: flex; }
    .sk-nav a { padding: 12px 20px; }
    .sk-body { flex-direction: column; }
    .sk-aside { width: 100%; }
    .sk-grid { grid-template-columns: 1fr; }
    .sk-card-img { width: 100%; height: auto; padding-top: 62%; }
    .sk-card { flex-direction: column; }
    .sk-hero-inner { padding: 36px 15px; }
    .sk-hero h1 { font-size: 26px; }
    .sk-article { padding: 18px; }
}