:root{
  --ink:#1f2933;
  --muted:#5f6b76;
  --navy:#1e3a5f;
  --navy-dk:#162c49;
  --line:#dde3e9;
  --bg:#f4f6f8;
  --card:#ffffff;
  --accent:#9e2b25;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  background:var(--bg);color:var(--ink);font-size:15px;line-height:1.7;
  display:flex;flex-direction:column;min-height:100vh;
}
a{color:var(--navy);text-decoration:none}

/* 顶栏 */
header{background:var(--navy);border-bottom:3px solid var(--accent)}
.topbar{max-width:1080px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:baseline;gap:12px}
.brand b{color:#fff;font-size:20px;letter-spacing:2px}
.brand span{color:#a9bdd4;font-size:12px;letter-spacing:1px}
nav{display:flex;gap:4px}
nav a{color:#c9d6e4;padding:8px 18px;font-size:14px;border-radius:3px}
nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
nav a.active{color:#fff;background:rgba(255,255,255,.14);font-weight:bold}

/* 页头横幅 */
.hero{background:#fff;border-bottom:1px solid var(--line)}
.hero-in{max-width:1080px;margin:0 auto;padding:40px 24px 34px}
.hero h1{font-size:26px;color:var(--navy-dk);letter-spacing:1px;font-weight:700}
.hero p{color:var(--muted);margin-top:8px;max-width:720px}

/* 主体 */
main{flex:1}
.wrap{max-width:1080px;margin:0 auto;padding:34px 24px 50px}
.sec-title{display:flex;align-items:center;gap:10px;margin-bottom:20px}
.sec-title::before{content:"";width:4px;height:18px;background:var(--accent);border-radius:1px}
.sec-title h2{font-size:18px;color:var(--navy-dk);letter-spacing:1px}

/* 工具卡片 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:26px 26px 22px;display:flex;flex-direction:column;transition:box-shadow .15s,border-color .15s}
.card:hover{box-shadow:0 6px 18px rgba(30,58,95,.10);border-color:#c3ceda}
.card .icon{width:46px;height:46px;border-radius:8px;background:#eef2f7;color:var(--navy);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .icon svg{width:24px;height:24px}
.card h3{font-size:17px;color:var(--ink);margin-bottom:6px}
.card .desc{color:var(--muted);font-size:13.5px;flex:1}
.card ul{list-style:none;margin:14px 0 18px;flex:1}
.card ul li{font-size:13px;color:var(--muted);padding:3px 0 3px 18px;position:relative}
.card ul li::before{content:"";position:absolute;left:2px;top:12px;width:5px;height:5px;border-radius:50%;background:#b9c6d4}
.card .foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px}
.card .tag{font-size:12px;color:#7d8894}
.btn{display:inline-block;background:var(--navy);color:#fff;padding:8px 22px;border-radius:3px;font-size:14px;letter-spacing:1px}
.btn:hover{background:var(--navy-dk);color:#fff}
.btn.ghost{background:#fff;color:var(--navy);border:1px solid var(--navy)}
.btn.ghost:hover{background:#eef2f7}

/* 说明条 */
.notice{margin-top:30px;background:#fbfcfd;border:1px solid var(--line);border-left:3px solid var(--navy);border-radius:4px;padding:14px 18px;font-size:13px;color:var(--muted)}

/* 下载页表格 */
.dl-table{width:100%;background:#fff;border:1px solid var(--line);border-radius:6px;border-collapse:separate;border-spacing:0;overflow:hidden}
.dl-table th{background:#f0f3f7;color:var(--navy-dk);font-size:13.5px;text-align:left;padding:12px 18px;border-bottom:1px solid var(--line);letter-spacing:1px;white-space:nowrap}
.dl-table td{padding:14px 18px;border-bottom:1px solid #edf0f4;font-size:14px;vertical-align:middle}
.dl-table tr:last-child td{border-bottom:none}
.dl-table .name{font-weight:bold;color:var(--ink);white-space:nowrap}
.dl-table .name small{display:block;font-weight:normal;color:#8a94a0;font-size:12px;margin-top:2px}
.dl-table .meta{color:var(--muted);font-size:13px;white-space:nowrap}
.dl-table .note{color:var(--muted);font-size:13px;min-width:200px}
.dl-btn{display:inline-block;background:var(--navy);color:#fff;padding:6px 18px;border-radius:3px;font-size:13px;white-space:nowrap}
.dl-btn:hover{background:var(--navy-dk);color:#fff}
.group-row td{background:#f7f9fb;color:var(--navy-dk);font-weight:bold;font-size:13.5px;letter-spacing:1px;padding:10px 18px}

/* 页脚 */
footer{background:#fff;border-top:1px solid var(--line)}
.foot-in{max-width:1080px;margin:0 auto;padding:20px 24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:#8a94a0;font-size:12.5px}

@media (max-width:720px){
  .topbar{padding:0 16px}
  .brand span{display:none}
  .hero-in,.wrap{padding-left:16px;padding-right:16px}
  .dl-table .note{display:none}
  .dl-table th:nth-child(3),.dl-table td:nth-child(3){display:none}
}