:root{
  --navy:#12305a; --blue:#2e7dc4; --blue-l:#e8f1fa;
  --ink:#182231; --gray:#5f6b7c; --gray-l:#8b97a8;
  --line:#e2e8f1; --line-s:#eef2f8; --bg:#f6f8fc; --card:#ffffff;
  --radius:14px;
  --shadow:0 1px 2px rgba(18,48,90,.05), 0 10px 28px -14px rgba(18,48,90,.22);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.78; font-size:16px; -webkit-font-smoothing:antialiased;
}
a{color:var(--blue); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:940px; margin:0 auto; padding:0 24px}

/* ---------- 顶栏 ---------- */
header.site{
  position:sticky; top:0; z-index:30;
  background:rgba(18,48,90,.93);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
header.site .wrap{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; padding-top:13px; padding-bottom:13px}
header.site a{color:#c7dbf1}
header.site .brand{font-weight:700; letter-spacing:.04em; color:#fff; font-size:15px}
header.site .brand:hover{text-decoration:none}
header.site nav{display:flex; gap:22px; font-size:14px}
header.site nav a:hover{color:#fff; text-decoration:none}

/* ---------- Hero ---------- */
.hero{
  position:relative; color:#fff; padding:66px 0 58px; overflow:hidden;
  background:
    radial-gradient(1100px 380px at 12% -12%, rgba(46,125,196,.55), transparent 62%),
    linear-gradient(155deg,#0e2a4f 0%,#1b4478 55%,#2e7dc4 140%);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 85%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 85%);
}
.hero .wrap{position:relative; z-index:1}
.hero h1{margin:0 0 8px; font-size:41px; letter-spacing:.03em; line-height:1.14}
.hero .role{color:#a9cdf0; font-weight:600; font-size:16px; margin-bottom:20px}
.hero p.lead{margin:0 0 24px; color:#dce8f7; max-width:670px; font-size:16.5px}
.tags{display:flex; flex-wrap:wrap; gap:8px; margin-bottom:26px}
.tag{background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2); color:#eaf3fc; border-radius:999px; padding:4px 13px; font-size:13px}
.hero .cta{display:flex; gap:12px; flex-wrap:wrap}
.btn{
  display:inline-block; background:#fff; color:var(--navy); font-weight:650; font-size:14.5px;
  padding:11px 22px; border-radius:10px; box-shadow:0 8px 20px -10px rgba(0,0,0,.55);
  transition:transform .15s, box-shadow .15s;
}
.btn:hover{text-decoration:none; transform:translateY(-1px); box-shadow:0 12px 26px -12px rgba(0,0,0,.6)}
.btn.ghost{background:transparent; color:#fff; border:1px solid rgba(255,255,255,.45); box-shadow:none}
.btn.ghost:hover{background:rgba(255,255,255,.1)}

main{padding:10px 0 72px}
section{padding:34px 0 4px}
h2.sec{font-size:21px; margin:0 0 18px; padding-left:15px; position:relative; letter-spacing:.01em}
h2.sec::before{
  content:""; position:absolute; left:0; top:.18em; bottom:.18em; width:4px; border-radius:2px;
  background:linear-gradient(180deg,var(--blue),var(--navy));
}

/* ---------- 项目卡片 ---------- */
.cards{display:grid; grid-template-columns:repeat(auto-fill,minmax(292px,1fr)); gap:18px}
.card{
  position:relative; display:block; background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius); padding:20px; overflow:hidden;
  transition:transform .18s, box-shadow .18s, border-color .18s;
}
.card::before{
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px; background:var(--blue);
  transform:scaleY(0); transform-origin:top; transition:transform .22s;
}
.card:hover{transform:translateY(-3px); box-shadow:var(--shadow); border-color:#cfdcec; text-decoration:none}
.card:hover::before{transform:scaleY(1)}
.card h3{margin:0 0 6px; font-size:17px; color:var(--navy); line-height:1.45}
.card .meta{font-size:12.5px; color:var(--gray-l); margin-bottom:10px}
.card p{margin:0 0 14px; font-size:14.5px; color:#43505f}
.card .k{display:flex; flex-wrap:wrap; gap:6px}
.k span{background:var(--blue-l); color:#1d4a80; font-size:12px; border-radius:6px; padding:3px 9px}

/* ---------- 文字块 ---------- */
.about p{margin:0 0 14px}
.skillrow{display:grid; grid-template-columns:160px 1fr; gap:12px; padding:11px 0; border-bottom:1px dashed var(--line); font-size:15px}
.skillrow:last-child{border-bottom:0}
.skillrow .lab{font-weight:700; color:var(--navy)}
.contact{display:grid; grid-template-columns:repeat(auto-fill,minmax(228px,1fr)); gap:14px}
.contact div{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:14px 18px; font-size:14.5px}
.contact .lab{display:block; font-size:12.5px; color:var(--gray-l); margin-bottom:3px}
.stats{display:grid; grid-template-columns:repeat(auto-fill,minmax(206px,1fr)); gap:14px}
.stat{background:linear-gradient(160deg,#fff,#f3f8fd); border:1px solid var(--line); border-radius:12px; padding:16px 18px}
.stat .lab{display:block; font-size:12.5px; color:var(--gray-l); margin-bottom:4px}
.stat b{font-size:19px; color:var(--navy); letter-spacing:.01em; font-weight:700}
footer.site{border-top:1px solid var(--line); padding:26px 0 48px; color:var(--gray-l); font-size:13.5px}

/* ---------- 项目页头 ---------- */
.proj-head{
  position:relative; color:#fff; padding:36px 0 30px;
  background:
    radial-gradient(900px 300px at 8% -25%, rgba(46,125,196,.5), transparent 62%),
    linear-gradient(150deg,#0e2a4f,#1b4478 70%,#28609b);
}
.proj-head h1{margin:0 0 10px; font-size:28px; line-height:1.34}
.proj-head .meta{color:#a9cdf0; font-size:14.5px; margin-bottom:16px}
.backlink{font-size:14px; margin-bottom:14px}
.backlink a{color:#a9cdf0}
.backlink a:hover{color:#fff}

/* ---------- 媒体展示位：统一比例，长短图都不会撑乱网格 ---------- */
.media{display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:18px; margin:6px 0 4px}
.slot{
  margin:0; background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; box-shadow:0 1px 2px rgba(18,48,90,.04);
  transition:border-color .18s, box-shadow .18s;
}
.slot:hover{border-color:#cfdcec; box-shadow:var(--shadow)}
.slot a{display:block; background:#eef3f9; aspect-ratio:16/10; cursor:zoom-in; line-height:0}
.slot img{width:100%; height:100%; object-fit:contain; display:block}
.slot video{width:100%; aspect-ratio:16/10; object-fit:contain; background:#0b1622; display:block}
.slot figcaption{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:10px 14px; font-size:13.5px; color:var(--gray);
  border-top:1px solid var(--line-s); line-height:1.5;
}
.slot figcaption .zoom{color:var(--gray-l); font-size:12px; white-space:nowrap}
.certs{grid-template-columns:repeat(auto-fit,minmax(286px,1fr))}
/* 正文内嵌图：跟着结论走 */
.fig{margin:14px 0 2px; background:#fff; border:1px solid var(--line); border-radius:12px; overflow:hidden}
.fig:hover{border-color:#cfdcec}
.fig a{display:block; background:#f3f6fa; cursor:zoom-in; line-height:0}
.fig img{width:100%; height:auto; display:block}
.fig figcaption{padding:11px 15px; font-size:13.5px; color:var(--gray); border-top:1px solid var(--line-s); line-height:1.66}
.figs{display:grid; gap:14px; margin:14px 0 2px}
.figs.two{grid-template-columns:repeat(auto-fit,minmax(252px,1fr))}
.mini-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:12px; margin:13px 0 2px}
.mini-tbl{width:100%; border-collapse:collapse; font-size:14px; min-width:460px}
.mini-tbl th,.mini-tbl td{padding:9px 12px; text-align:left; border-bottom:1px solid var(--line-s)}
.mini-tbl thead th{background:#f1f6fc; color:var(--navy); font-weight:700; white-space:nowrap}
.mini-tbl tbody tr:last-child td{border-bottom:0}
.mini-tbl td:last-child{color:var(--blue); font-weight:650}
.certs .slot a{aspect-ratio:4/3; background:#f1f5fa}

/* ---------- 列表 / 信息盒 ---------- */
ul.bul{margin:0; padding-left:0; list-style:none}
ul.bul li{position:relative; padding-left:20px; margin-bottom:11px}
ul.bul li::before{
  content:""; position:absolute; left:4px; top:.72em; width:6px; height:6px;
  border-radius:50%; background:var(--blue); opacity:.75;
}
ul.bul li b{color:var(--navy)}
.box{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:18px 22px; margin:6px 0 4px}
.box .lab{font-weight:700; color:var(--navy); margin-right:6px}
.twocol{column-count:2; column-gap:36px}
.twocol li{break-inside:avoid}

/* ---------- 数据表 ---------- */
.tbl-wrap{overflow-x:auto; background:#fff; border:1px solid var(--line); border-radius:var(--radius)}
table.tbl{width:100%; border-collapse:collapse; font-size:14.5px; min-width:520px}
table.tbl th,table.tbl td{padding:12px 15px; text-align:left; border-bottom:1px solid var(--line-s)}
table.tbl thead th{background:#f1f6fc; color:var(--navy); font-weight:700; white-space:nowrap}
table.tbl tbody tr:last-child td{border-bottom:0}
table.tbl tbody tr:hover{background:#fafcfe}
table.tbl td:last-child{color:var(--blue); font-weight:650}
.tbl-note{font-size:13px; color:var(--gray-l); margin-top:9px}

/* ---------- 图片灯箱 ---------- */
.lb{
  position:fixed; inset:0; z-index:99; padding:26px; cursor:zoom-out;
  background:rgba(9,20,35,.93); display:flex; align-items:center; justify-content:center;
  animation:fade .16s ease;
}
.lb[hidden]{display:none}
.lb img{max-width:100%; max-height:100%; border-radius:8px; box-shadow:0 26px 64px -22px rgba(0,0,0,.85)}
.lb .cap{position:absolute; left:0; right:0; bottom:16px; text-align:center; color:#c7dbf1; font-size:13.5px; padding:0 24px}
.lb .x{position:absolute; top:12px; right:20px; color:#dce8f7; font-size:30px; line-height:1; opacity:.8}
@keyframes fade{from{opacity:0}to{opacity:1}}

@media(max-width:680px){
  .hero{padding:46px 0 38px} .hero h1{font-size:30px} .hero p.lead{font-size:15.5px}
  .proj-head h1{font-size:22px}
  .skillrow{grid-template-columns:1fr; gap:2px; padding:10px 0}
  .twocol{column-count:1}
  header.site nav{gap:16px}
}