:root {
    --primary: #2b6cb0;
    --primary-light: #3182ce;
    --accent: #f15a29;
    --text: #2b3a55;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-soft: #f6f9ff;
    --border: #e5ecf5;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(43, 60, 85, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.8;
    font-size: 16px;
}

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

/* ===== 顶部导航 ===== */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 12px rgba(43, 60, 85, 0.05);
}
.nav-inner {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-size: 18px; font-weight: 700; color: var(--text); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--primary); text-decoration: none; }
.nav-cta {
    background: var(--primary);
    color: #fff;
    border: 0;
    border-radius: 999px;
    padding: 8px 22px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.nav-cta:hover { background: var(--primary-light); }

/* ===== 主内容 ===== */
.page-wrap { max-width: 860px; margin: 0 auto; padding: 48px 24px 72px; }
.page-hero { background: linear-gradient(135deg, #e7f0fb 0%, #f6f9ff 100%); border-radius: var(--radius); padding: 40px 36px; margin-bottom: 36px; }
.page-hero .tag { display: inline-block; background: var(--primary); color: #fff; font-size: 13px; padding: 4px 14px; border-radius: 999px; margin-bottom: 16px; }
.page-hero h1 { font-size: 30px; margin-bottom: 10px; color: var(--text); }
.page-hero p { color: var(--text-light); max-width: 640px; }

/* ===== 内容卡片 ===== */
.block { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 30px; margin-bottom: 20px; box-shadow: var(--shadow); }
.block h2 { font-size: 21px; margin-bottom: 14px; color: var(--text); position: relative; padding-left: 14px; }
.block h2::before { content: ''; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px; border-radius: 4px; background: var(--primary-light); }
.block h3 { font-size: 17px; margin: 18px 0 8px; }
.block p { margin-bottom: 12px; color: var(--text); }
.block ul, .block ol { margin: 0 0 14px 22px; }
.block li { margin-bottom: 6px; color: var(--text); }
.block a { word-break: break-all; }

.highlight { background: var(--bg-soft); border-left: 4px solid var(--primary-light); padding: 14px 18px; border-radius: 8px; margin: 14px 0; }
.highlight p { margin: 0; color: var(--text-light); }

/* ===== 列表卡片 ===== */
.card-list { display: grid; gap: 16px; }
.card-item { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; box-shadow: var(--shadow); transition: transform .2s; }
.card-item:hover { transform: translateY(-3px); }
.card-item .card-date { font-size: 13px; color: var(--text-light); margin-bottom: 6px; }
.card-item h2 { font-size: 19px; margin-bottom: 8px; }
.card-item h2 a { color: var(--text); }
.card-item h2 a:hover { color: var(--primary); text-decoration: none; }
.card-item p { color: var(--text-light); font-size: 15px; }

/* ===== 页脚 ===== */
.site-footer { background: #1e2a3d; color: #c7d2e0; margin-top: 40px; }
.footer-grid { max-width: 1160px; margin: 0 auto; padding: 44px 24px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.footer-grid .f-col h4 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.footer-grid p { font-size: 14px; color: #a8b6c8; line-height: 1.8; }
.footer-grid a { color: #a8b6c8; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; }
.footer-bottom-inner { max-width: 1160px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: #8c9aaf; }
.footer-bottom-inner a { color: #8c9aaf; }

/* ===== 响应式 ===== */
@media (max-width: 860px) {
    .nav-links { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .page-wrap { padding: 32px 16px 56px; }
    .page-hero { padding: 28px 20px; }
    .page-hero h1 { font-size: 24px; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
    .block { padding: 20px 18px; }
}