/* ============================================================
   057999.xyz — 公共卫生监测与防控工具
   共享设计系统 · 医疗专业风
   主色 teal(可信、专业) + slate 中性色
   ============================================================ */

:root {
    /* 主色 — teal,比 emerald 更沉稳专业 */
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #14b8a6;
    --primary-darker: #115e59;

    /* 背景与卡片 */
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-alt: #f1f5f9;

    /* 文字 */
    --text: #0f172a;
    --text-muted: #64748b;
    --text-inverse: #ffffff;

    /* 边框与高亮 */
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --highlight: #ccfbf1;

    /* 阴影 */
    --shadow: 0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 8px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 12px 24px -8px rgba(15, 23, 42, 0.12), 0 4px 10px -4px rgba(15, 23, 42, 0.06);

    /* 圆角与字号 */
    --radius: 14px;
    --radius-sm: 8px;
    --radius-lg: 20px;

    /* 布局 */
    --maxw: 1180px;
    --maxw-text: 820px;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* ---------- 顶部 topbar ---------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg);
}
.topbar-inner { max-width: var(--maxw); margin: 0 auto; padding: 18px 20px 14px; }
.title { font-size: 22px; font-weight: 700; margin: 0 0 4px; letter-spacing: .3px; }
.subtitle { font-size: 13px; color: rgba(255,255,255,0.85); margin: 0; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
    width: 40px; height: 40px; flex-shrink: 0;
    border-radius: 10px;
    background: rgba(255,255,255,0.16);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 800;
    border: 1px solid rgba(255,255,255,0.25);
}

/* ---------- 主导航 ---------- */
.nav {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px;
}
.nav a {
    color: #fff; text-decoration: none;
    font-size: 13px; font-weight: 500;
    padding: 6px 14px;
    border: 1px solid rgba(255,255,255,0.22);
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    transition: background .15s ease;
}
.nav a:hover { background: rgba(255,255,255,0.18); text-decoration: none; }

/* ---------- 容器与内容区 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 24px 20px 40px; }
.container-text { max-width: var(--maxw-text); margin: 0 auto; padding: 28px 20px 48px; }

/* ---------- 区块标题 ---------- */
section { margin-top: 32px; }
.section-head {
    display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.section-head h2 { margin: 0; font-size: 20px; font-weight: 700; color: var(--text); }
.badge {
    font-size: 12px; font-weight: 600;
    padding: 3px 12px; border-radius: 999px;
    background: var(--highlight); color: var(--primary-darker);
}
.desc { margin: 0 0 16px; color: var(--text-muted); font-size: 14px; }

/* ---------- 卡片网格 ---------- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}
.card-title { font-size: 15px; font-weight: 700; margin: 0 0 8px; color: var(--text); }
.card-badge {
    display: inline-block; font-size: 11px; font-weight: 600;
    padding: 3px 10px; border-radius: 999px;
    background: var(--highlight); color: var(--primary-darker); margin-bottom: 10px;
}
.card-desc { font-size: 13px; color: var(--text); margin: 0 0 14px; }
.card-icon {
    width: 38px; height: 38px; border-radius: 10px;
    background: var(--highlight); color: var(--primary-dark);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 18px; margin-bottom: 10px;
}
.actions { display: flex; justify-content: flex-end; }
.actions a {
    text-decoration: none; font-size: 13px; font-weight: 600;
    padding: 8px 16px; border-radius: 999px;
    background: var(--primary); color: #fff;
    transition: background .15s ease;
}
.actions a:hover { background: var(--primary-dark); text-decoration: none; }

/* ---------- 信息框 ---------- */
.info-box {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
}
.info-box p { margin: 0; color: var(--text-muted); font-size: 14px; }

/* ---------- 文章/长文内容(用于详情页) ---------- */
.article { color: var(--text); }
.article h1 { font-size: 26px; line-height: 1.3; margin: 0 0 8px; }
.article h2 {
    font-size: 19px; color: var(--primary-dark);
    margin: 28px 0 12px; padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
}
.article h3 { font-size: 16px; color: var(--primary-darker); margin: 20px 0 10px; }
.article p { margin: 0 0 14px; }
.article ul, .article ol { padding-left: 22px; margin: 0 0 14px; }
.article li { margin: 6px 0; }
.article a { color: var(--primary); }
.article blockquote {
    background: #fffbeb; border-left: 4px solid #f59e0b;
    padding: 12px 16px; margin: 16px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: #92400e;
}
.article pre {
    background: #1e293b; color: #e2e8f0;
    padding: 14px 16px; border-radius: var(--radius-sm);
    overflow-x: auto; margin: 16px 0; font-size: 13px;
}
.article code {
    background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: .9em;
}
.article pre code { background: none; padding: 0; }
.article table {
    width: 100%; border-collapse: collapse; margin: 16px 0;
    background: #fff; border-radius: var(--radius-sm); overflow: hidden; box-shadow: var(--shadow);
    font-size: 14px;
}
.article table th {
    background: var(--highlight); color: var(--primary-darker);
    padding: 10px 12px; text-align: left; border-bottom: 2px solid var(--border);
    font-weight: 600;
}
.article table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.article hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.intro-text {
    background: var(--bg-card); border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 14px 18px; margin-bottom: 20px; box-shadow: var(--shadow);
}
.meta-info { color: var(--text-muted); font-size: 13px; margin-bottom: 14px; }

/* ---------- 广告占位(不显式插入,预留类以备后用) ---------- */
.ad-slot { margin: 18px 0; }
.ad-label {
    font-size: 10px; color: var(--text-muted); text-align: center;
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px;
}

/* ---------- 页脚 ---------- */
footer {
    margin-top: 32px; padding: 22px 20px 26px;
    border-top: 1px solid var(--border);
    text-align: center; color: var(--text-muted); font-size: 12px;
}
footer a { color: var(--primary-dark); text-decoration: none; }
footer a:hover { text-decoration: underline; }
.footer-links { margin-top: 12px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; }
.wechat { margin-top: 10px; color: var(--text-muted); }
.wechat strong { color: var(--text); }

/* ---------- 通用工具类 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
    .title { font-size: 19px; }
    .topbar-inner { padding: 14px 16px 12px; }
    .container { padding: 16px 14px 30px; }
    .container-text { padding: 20px 14px 36px; }
    .section-head h2 { font-size: 17px; }
    .nav a { font-size: 12px; padding: 5px 10px; }
    .article h1 { font-size: 22px; }
    .article h2 { font-size: 17px; }
}

/* ---------- 无障碍:尊重减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .card, .nav a, .actions a { transition: none; }
    .card:hover { transform: none; }
}