/* ========================================================================
   因大联科集团 — 蓝金品牌视觉 · 苹方 · 编辑式排版
   brand navy #1F2244 · gold #B88450 / #C99E65
   ======================================================================== */
:root{
  --bg:#ffffff;
  --soft:#f6f5f2;        /* 暖白 */
  --soft2:#efece6;
  --navy:#1f2244;        /* 品牌主蓝 */
  --navy2:#141733;
  --navy3:#2a2e57;
  --blue-a:#0a539a;      /* 点缀蓝（链接） */
  --gold:#b88450;
  --gold-l:#c99e65;
  --gold-ll:#dcc196;
  --gold-d:#9c6f3f;
  --ink:#1b1d2b;
  --ink2:#3a3d4e;
  --grey:#6b6e7d;
  --grey-l:#9a9caa;
  --line:#e6e4e0;
  --line-d:#cfccc6;
  --maxw:1320px;
  --ease:cubic-bezier(.19,1,.22,1);
  --nav-h:78px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-weight:400;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;font-size:16.5px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}
.wrap-n{max-width:980px;margin:0 auto;padding:0 40px}

/* ---------- type ---------- */
h1,h2,h3,h4{font-weight:600;line-height:1.14;letter-spacing:-.01em;color:var(--navy)}
.display{font-size:clamp(42px,6.6vw,98px);font-weight:600;line-height:1.02;letter-spacing:-.02em}
.h-xl{font-size:clamp(32px,4.4vw,60px);font-weight:600;line-height:1.08;letter-spacing:-.015em}
.h-lg{font-size:clamp(27px,3vw,42px);font-weight:600}
.h-md{font-size:clamp(21px,2vw,28px);font-weight:600}
.lead{font-size:clamp(18px,1.5vw,22px);font-weight:400;line-height:1.72;color:var(--ink2)}
.body{font-size:17px;font-weight:400;line-height:1.9;color:var(--ink2)}
.muted{color:var(--grey)}
.label{font-size:12.5px;font-weight:600;letter-spacing:.16em;color:var(--gold-d);display:inline-block}
.label.on-dark{color:var(--gold-l)}
em{font-style:normal}

/* ---------- NAV ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);
  display:flex;align-items:center;transition:background .5s var(--ease),border-color .5s,box-shadow .5s;
  border-bottom:1px solid transparent}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;width:100%}
.nav.solid,.nav.light{background:rgba(255,255,255,.9);backdrop-filter:blur(16px) saturate(160%);-webkit-backdrop-filter:blur(16px) saturate(160%);border-bottom-color:var(--line);box-shadow:0 2px 24px rgba(31,34,68,.05)}
.brand{display:flex;align-items:center;z-index:1002}
.brand img{height:36px;width:auto;transition:.4s var(--ease)}
.nav.on-hero:not(.solid) .brand img{filter:brightness(0) invert(1)}
.menu{display:flex;align-items:center;gap:2px}
.menu>li{position:relative;list-style:none}
.menu>li>a{display:block;padding:11px 17px;font-size:15.5px;font-weight:500;color:var(--ink);letter-spacing:.01em;transition:.25s;position:relative}
.nav.on-hero:not(.solid) .menu>li>a{color:rgba(255,255,255,.92)}
.menu>li>a::after{content:"";position:absolute;left:17px;right:17px;bottom:6px;height:2px;background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .32s var(--ease)}
.menu>li>a:hover::after,.menu>li.active>a::after{transform:scaleX(1)}
.menu>li.active>a{color:var(--navy)}
.nav.on-hero:not(.solid) .menu>li.active>a{color:#fff}
/* dropdown */
.subm{position:absolute;top:calc(100% - 4px);left:8px;min-width:214px;background:#fff;border:1px solid var(--line);
  box-shadow:0 26px 60px rgba(31,34,68,.16);padding:10px;
  opacity:0;visibility:hidden;transform:translateY(9px);transition:.3s var(--ease);list-style:none}
.menu>li.has-sub:hover .subm{opacity:1;visibility:visible;transform:none}
.subm li{list-style:none}
.subm a{display:block;padding:12px 16px;font-size:15px;color:var(--ink2);transition:.2s;border-left:2px solid transparent}
.subm a:hover{background:var(--soft);color:var(--navy);border-left-color:var(--gold);padding-left:20px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;z-index:1002}
.burger span{width:26px;height:2px;background:var(--navy);transition:.3s var(--ease)}
.nav.on-hero:not(.solid) .burger span{background:#fff}
.burger.open span{background:var(--navy)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;overflow:hidden;background:var(--navy)}
.hero-media{position:absolute;inset:0}
.hero-media .slide{position:absolute;inset:0;opacity:0;transition:opacity 1.6s var(--ease)}
.hero-media .slide.on{opacity:1}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:
  linear-gradient(105deg,rgba(20,23,51,.90) 0%,rgba(20,23,51,.62) 46%,rgba(20,23,51,.30) 100%),
  linear-gradient(0deg,rgba(15,17,38,.80),rgba(15,17,38,0) 55%)}
.hero-inner{position:relative;z-index:3;width:100%;padding-bottom:clamp(58px,9vh,112px);padding-top:130px}
.hero .label{color:var(--gold-l);margin-bottom:26px}
.hero h1{color:#fff;max-width:15ch}
.hero .lead{color:rgba(255,255,255,.86);max-width:50ch;margin-top:28px;font-weight:400}
.hero-actions{display:flex;gap:14px;margin-top:40px;flex-wrap:wrap}
.slide-dots{position:absolute;right:40px;bottom:clamp(58px,9vh,112px);z-index:5;display:flex;flex-direction:column;gap:10px}
.slide-dots button{width:9px;height:9px;border-radius:50%;border:0;background:rgba(255,255,255,.35);cursor:pointer;transition:.3s;padding:0}
.slide-dots button.on{background:var(--gold-l);height:26px;border-radius:5px}

/* subpage hero */
.phero{position:relative;padding:calc(var(--nav-h) + 96px) 0 84px;background:var(--navy);overflow:hidden}
.phero.photo .phero-bg{position:absolute;inset:0}
.phero.photo .phero-bg img{width:100%;height:100%;object-fit:cover}
.phero.photo .phero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,23,51,.72),rgba(20,23,51,.86))}
.phero .inner{position:relative;z-index:2}
.phero .label{color:var(--gold-l);margin-bottom:20px}
.phero h1{color:#fff}
.phero .lead{color:rgba(255,255,255,.85);max-width:60ch;margin-top:22px}
.crumb{position:relative;z-index:2;font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:30px;letter-spacing:.02em}
.crumb a:hover{color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:11px;padding:15px 28px;font-size:15px;font-weight:500;
  border:1px solid var(--navy);color:var(--navy);background:transparent;cursor:pointer;transition:.35s var(--ease);letter-spacing:.01em}
.btn:hover{background:var(--navy);color:#fff}
.btn .arw{transition:transform .35s var(--ease)}
.btn:hover .arw{transform:translateX(5px)}
.btn.inv{border-color:rgba(255,255,255,.55);color:#fff}
.btn.inv:hover{background:#fff;color:var(--navy);border-color:#fff}
.btn.solid{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn.solid:hover{background:var(--gold);border-color:var(--gold);color:#fff}
.btn.gold{background:linear-gradient(135deg,var(--gold-l),var(--gold-d));border-color:transparent;color:#fff}
.btn.gold:hover{background:linear-gradient(135deg,var(--gold-ll),var(--gold))}
.tlink{display:inline-flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--navy);
  border-bottom:2px solid var(--gold);padding-bottom:4px;transition:.3s}
.tlink .arw{transition:transform .3s var(--ease)}
.tlink:hover{color:var(--gold-d)}
.tlink:hover .arw{transform:translateX(5px)}
.tlink.on-dark{color:#fff;border-color:var(--gold-l)}
.tlink.on-dark:hover{color:var(--gold-l)}

/* ---------- sections ---------- */
section{position:relative}
.sec{padding:clamp(76px,11vh,148px) 0}
.sec.soft{background:var(--soft)}
.sec.dark{background:var(--navy);color:#fff}
.sec.dark h2,.sec.dark h3,.sec.dark h4{color:#fff}
.sec.dark .body{color:rgba(255,255,255,.76)}
.sec-head{max-width:840px;margin-bottom:60px}
.sec-head .label{margin-bottom:20px}
.sec-head h2{margin-top:6px}

.split{display:grid;grid-template-columns:0.9fr 1.1fr;gap:clamp(30px,6vw,88px);align-items:start}
.split.mid{align-items:center}

/* ---------- stats（纯文字） ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.dark .stats{border-color:rgba(255,255,255,.2)}
.stat{padding:36px 26px 30px;border-right:1px solid var(--line)}
.dark .stat{border-color:rgba(255,255,255,.16)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:clamp(40px,4.4vw,58px);font-weight:600;letter-spacing:-.02em;line-height:1;color:var(--navy)}
.dark .stat b{color:var(--gold-l)}
.stat b sup{font-size:.44em;font-weight:500;vertical-align:super;margin-left:2px}
.stat .st{font-size:15px;font-weight:600;margin:16px 0 6px;color:var(--ink)}
.dark .stat .st{color:#fff}
.stat .sd{font-size:14px;color:var(--grey);line-height:1.65}
.dark .stat .sd{color:rgba(255,255,255,.6)}

/* ---------- numbered rows ---------- */
.rows{border-top:1px solid var(--line)}
.dark .rows{border-color:rgba(255,255,255,.18)}
.frow{display:grid;grid-template-columns:78px 1fr 1.4fr;gap:30px;padding:38px 0;border-bottom:1px solid var(--line);align-items:baseline;transition:.4s var(--ease)}
.dark .frow{border-color:rgba(255,255,255,.16)}
.frow:hover{padding-left:14px}
.frow .n{font-size:19px;font-weight:600;color:var(--gold-d);letter-spacing:.02em}
.dark .frow .n{color:var(--gold-l)}
.frow h4{font-size:22px}
.frow p{font-size:16px;color:var(--grey);line-height:1.8}
.dark .frow p{color:rgba(255,255,255,.64)}

/* ---------- cards grid ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.grid.c2{grid-template-columns:1fr 1fr}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.cell{background:var(--bg);padding:42px 36px;transition:.4s var(--ease);display:block}
.cell:hover{background:var(--soft)}
.cell .n{font-size:15px;color:var(--gold-d);font-weight:600;letter-spacing:.06em}
.cell h4{font-size:21px;margin:12px 0 13px}
.cell p{font-size:15.5px;color:var(--grey);line-height:1.8}
.cell.linkable:hover h4{color:var(--gold-d)}

/* ---------- five-chain nodes ---------- */
.chain{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}
.chain .node{padding:14px 28px;border:1px solid var(--line-d);border-radius:44px;font-size:17px;font-weight:500;
  transition:.35s var(--ease);background:var(--bg);color:var(--navy)}
.chain .node:hover{background:var(--navy);color:#fff;border-color:var(--navy);transform:translateY(-3px)}
.dark .chain .node{border-color:rgba(255,255,255,.3);color:#fff;background:transparent}
.dark .chain .node:hover{background:var(--gold);border-color:var(--gold)}

/* ---------- photo band ---------- */
.band{position:relative;min-height:clamp(360px,54vh,580px);overflow:hidden;display:flex;align-items:center}
.band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,23,51,.86),rgba(20,23,51,.42))}
.band .bc{position:relative;z-index:2;color:#fff;padding:60px 0}
.band .bc h2{color:#fff;max-width:18ch}

/* ---------- project cards（自营园区） ---------- */
.projs{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.proj{border:1px solid var(--line);background:#fff;transition:.4s var(--ease);display:flex;flex-direction:column;overflow:hidden}
.proj:hover{transform:translateY(-5px);box-shadow:0 28px 60px rgba(31,34,68,.13)}
.proj .pv{aspect-ratio:16/9;overflow:hidden;background:var(--soft2)}
.proj .pv img{width:100%;height:100%;object-fit:cover;transition:.7s var(--ease)}
.proj:hover .pv img{transform:scale(1.05)}
.proj .pb{padding:30px 32px 34px;flex:1;display:flex;flex-direction:column}
.proj .loc{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--gold-d);text-transform:uppercase}
.proj h3{font-size:23px;margin:10px 0 12px}
.proj p{font-size:15.5px;color:var(--grey);line-height:1.75;flex:1}
.proj .pm{margin-top:20px;display:flex;gap:24px;flex-wrap:wrap}
.proj .pm .kv b{font-size:24px;color:var(--navy);font-weight:600;display:block;line-height:1}
.proj .pm .kv span{font-size:12.5px;color:var(--grey)}

/* ---------- news ---------- */
.ncards{display:grid;grid-template-columns:repeat(3,1fr);gap:34px}
.ncard{border:1px solid var(--line);background:#fff;transition:.4s var(--ease);display:flex;flex-direction:column}
.ncard:hover{transform:translateY(-5px);box-shadow:0 26px 56px rgba(31,34,68,.12)}
.ncard .cover{aspect-ratio:16/10;overflow:hidden;background:var(--soft2)}
.ncard .cover img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
.ncard:hover .cover img{transform:scale(1.05)}
.ncard .nb{padding:24px 26px 30px;flex:1;display:flex;flex-direction:column}
.ncard .date{font-size:13px;color:var(--grey)}
.ncard .date b{color:var(--gold-d);font-weight:600}
.ncard h3{font-size:19.5px;margin:10px 0 10px;line-height:1.45}
.ncard p{font-size:15px;color:var(--grey);flex:1;line-height:1.7}
.nlist{border-top:1px solid var(--line)}
.nitem{display:grid;grid-template-columns:180px 1fr auto;gap:36px;padding:38px 0;border-bottom:1px solid var(--line);align-items:baseline;transition:.4s var(--ease)}
.nitem:hover{padding-left:14px;background:linear-gradient(90deg,var(--soft),transparent)}
.nitem .date{font-size:14px;color:var(--grey)}
.nitem .tag{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--gold-d);margin-bottom:8px;display:block}
.nitem h3{font-size:23px;font-weight:600}
.nitem p{font-size:15.5px;color:var(--grey);margin-top:8px;max-width:64ch}
.nitem .go{font-size:22px;color:var(--gold-d);transition:.3s}
.nitem:hover .go{transform:translateX(5px)}

/* article */
.article{max-width:780px;margin:0 auto}
.article .cover{margin:0 0 44px}
.article .cover img{width:100%}
.article h1{font-size:clamp(29px,4vw,46px);margin-bottom:20px}
.article .meta{font-size:14.5px;color:var(--grey);margin-bottom:40px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.article .meta b{color:var(--gold-d)}
.article .content{font-size:17.5px;line-height:1.95;color:var(--ink2)}
.article .content p{margin-bottom:24px}
.article .content img{margin:32px 0;width:100%}
.article .content h2{font-size:26px;margin:42px 0 16px;color:var(--navy)}

/* ---------- contact ---------- */
.cgrid{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line)}
.cblock{padding:46px 44px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.cblock:nth-child(2n){border-right:0}
.cblock .label{margin-bottom:16px}
.cblock h3{font-size:21px;margin-bottom:12px}
.cblock p{font-size:16.5px;color:var(--ink2);line-height:1.8}
.mapbox{aspect-ratio:21/9;background:var(--soft2);border:1px solid var(--line)}
.mapbox iframe{width:100%;height:100%;border:0}

/* ---------- form ---------- */
.form{display:grid;gap:20px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field label{display:block;font-size:13px;letter-spacing:.06em;color:var(--grey);margin-bottom:9px;font-weight:500}
.field input,.field textarea,.field select{width:100%;padding:14px 16px;border:1px solid var(--line-d);background:#fff;font-family:inherit;font-size:16px;color:var(--ink);transition:.3s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--navy)}

/* ---------- footer ---------- */
.foot{background:var(--navy2);color:#fff;padding:82px 0 0}
.foot-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.14)}
.foot-brand img{height:42px;filter:brightness(0) invert(1);margin-bottom:24px}
.foot-brand p{font-size:14.5px;color:rgba(255,255,255,.56);line-height:1.85;max-width:42ch}
.foot-col h5{font-size:13px;letter-spacing:.1em;color:var(--gold-l);margin-bottom:20px;font-weight:600}
.foot-col a{display:block;font-size:15px;color:rgba(255,255,255,.82);margin-bottom:13px;transition:.25s;width:fit-content}
.foot-col a:hover{color:var(--gold-l);transform:translateX(4px)}
.foot-bot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;padding:26px 0}
.foot-bot p,.foot-bot a{font-size:13.5px;color:rgba(255,255,255,.48)}
.foot-bot a:hover{color:var(--gold-l)}
.foot-bot .icp{display:flex;gap:22px;flex-wrap:wrap}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}.rv.d4{transition-delay:.32s}

/* ========================================================================
   RESPONSIVE
   ======================================================================== */
@media(max-width:1024px){
  .wrap{padding:0 32px}
  .split{grid-template-columns:1fr;gap:36px}
  .stats{grid-template-columns:1fr 1fr}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .grid.c3{grid-template-columns:1fr 1fr}
  .ncards{grid-template-columns:1fr 1fr}
  .projs{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr 1fr;gap:34px}
  .frow{grid-template-columns:56px 1fr;gap:20px}
  .frow p{grid-column:2}
}
@media(max-width:720px){
  body{font-size:16px}
  .wrap,.wrap-n{padding:0 22px}
  .burger{display:flex}
  .slide-dots{display:none}
  .menu{position:fixed;inset:0;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    background:#fff;padding:calc(var(--nav-h) + 20px) 22px 40px;transform:translateX(100%);transition:transform .5s var(--ease);overflow-y:auto}
  .menu.open{transform:none}
  .menu>li>a{padding:18px 4px;font-size:20px;color:var(--navy)!important;border-bottom:1px solid var(--line)}
  .menu>li>a::after{display:none}
  .subm{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 12px 6px;
    max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
  .menu>li.has-sub.open-sub .subm{max-height:420px}
  .subm a{padding:12px 6px;font-size:16.5px;color:var(--grey)}
  .grid.c2,.grid.c3,.ncards,.cgrid,.form .row2,.foot-top{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .cblock{border-right:0}
  .nitem{grid-template-columns:1fr;gap:8px}
  .nitem .go{display:none}
  .band{min-height:auto}
  .hero-inner{padding-top:112px}
}