:root{
  --brand-1:#4f46e5; --brand-2:#7c3aed; --brand-3:#0ea5e9;
  --bg:#f5f7fb; --panel:#ffffff; --ink:#1f2937; --muted:#6b7280; --line:#e5e7eb;
  --radius:16px;
  --shadow:0 1px 3px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ===== 站点级导航（首页/关于/联系/日报共用） ===== */
.site-nav{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-nav .inner{max-width:var(--maxw);margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px}
.brand{font-size:18px;font-weight:800;color:var(--brand-1);letter-spacing:.5px;white-space:nowrap}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.1em}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:auto;overflow-x:auto}
.nav-links a{flex:0 0 auto;font-size:14px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 14px;white-space:nowrap;transition:transform .2s,background .2s,color .2s}
.nav-links a:hover{background:#f3f4f6;transform:translateY(-1px)}
.nav-links a.active{color:#fff;background:var(--brand-1);border-color:transparent}
.nav-links a.soon{color:var(--muted);cursor:default;opacity:.7}
.nav-links a.soon:hover{background:transparent;transform:none}
.tag-soon{font-size:10px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:1px 6px;margin-left:6px;color:var(--muted)}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,var(--brand-1) 0%,var(--brand-2) 55%,var(--brand-3) 100%);color:#fff;padding:56px 24px 48px;text-align:center}
.hero .kicker{font-size:13px;letter-spacing:.18em;opacity:.85;margin:0 0 10px}
.hero h1{margin:0;font-size:clamp(28px,5vw,46px);font-weight:800;letter-spacing:.5px}
.hero p.lead{margin:14px auto 0;max-width:560px;font-size:15px;opacity:.95}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;padding:12px 24px;border-radius:999px;transition:transform .2s,box-shadow .2s;cursor:pointer;border:1px solid transparent}
.btn:hover{transform:scale(1.05)}
.btn:active{transform:scale(.95)}
.btn-primary{background:#fff;color:var(--brand-1)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ===== 布局 ===== */
.wrap{max-width:var(--maxw);margin:0 auto;padding:28px 20px 60px}
.section{margin:38px 0}
.sec-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.sec-head .bar{width:5px;height:26px;border-radius:3px;background:var(--brand-1)}
.sec-head h2{margin:0;font-size:21px;font-weight:800}
.sec-head .pill{margin-left:auto;font-size:13px;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px 12px}

/* ===== 往期归档 ===== */
.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.archive-card{display:flex;flex-direction:column;gap:6px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.archive-card:hover{transform:translateY(-3px);box-shadow:0 6px 16px rgba(16,24,40,.12)}
.archive-card .date{font-size:16px;font-weight:700}
.archive-card .meta{font-size:13px;color:var(--muted)}
.archive-card .go{margin-top:6px;font-size:13px;font-weight:700;color:var(--brand-1)}

/* ===== 关于正文 ===== */
.prose{max-width:760px}
.prose p{font-size:15px;color:#374151}
.prose h2{font-size:21px;font-weight:800;display:flex;align-items:center;gap:12px;margin:0 0 18px}
.prose h2 .bar{width:5px;height:26px;border-radius:3px;background:var(--brand-1)}
.prose h3{font-size:17px;margin-top:26px;color:var(--ink)}
.prose a{color:var(--brand-1);font-weight:600}
.prose code{background:#eef1f6;padding:2px 6px;border-radius:6px;font-size:13px}

/* ===== 联系 ===== */
.contact-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-top:8px}
.contact-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.contact-card .k{font-size:13px;color:var(--muted)}
.contact-card .v{font-size:16px;font-weight:700;margin-top:4px}
.contact-card a{color:var(--brand-1)}

/* ===== 页脚 ===== */
.site-footer{max-width:var(--maxw);margin:0 auto;padding:24px 20px 50px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.site-footer a{color:var(--brand-1);font-weight:600}
.site-footer .note{margin-top:8px;font-size:12.5px;opacity:.85}

/* ===== 响应式 ===== */
@media (max-width:560px){
  .hero{padding:40px 16px 32px}
  .wrap{padding:20px 14px 50px}
  .nav-links a{padding:6px 12px;font-size:13px}
  .brand small{display:none}
  .archive-grid{grid-template-columns:1fr}
}