/* ============================================================
   优链智能 OOOMOOO.COM — 官网样式
   色彩体系: 深海军蓝 #1E2A4A / Steel Blue #1E4E8C / 电光青 #22D3EE / 活力橙 #FF8A00
   ============================================================ */
:root{
  --navy:#1E2A4A; --navy-deep:#141E36; --steel:#1E4E8C; --steel-light:#E8F0FA;
  --cyan:#22D3EE; --orange:#FF8A00; --orange-soft:#FFF3E3;
  --ink:#1F2933; --gray:#5F6B7A; --line:#E3E8EF; --bg:#FFFFFF; --bg-alt:#F6F9FC;
  --radius:14px; --shadow:0 8px 30px rgba(20,32,64,.08);
  --shadow-hover:0 16px 44px rgba(20,32,64,.14);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.scrolled{box-shadow:0 4px 20px rgba(20,32,64,.08);}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand img{height:44px;width:auto;}
.brand .name{font-size:19px;font-weight:700;color:var(--navy);letter-spacing:1px;}
.brand .name small{display:block;font-size:11px;font-weight:500;color:var(--gray);letter-spacing:2.5px;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  padding:9px 16px;border-radius:8px;font-size:15px;color:var(--ink);
  transition:all .2s;position:relative;
}
.nav-links a:hover{background:var(--steel-light);color:var(--steel);}
.nav-links a.active{color:var(--steel);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:3px;height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));border-radius:2px;
}
.nav-cta{
  margin-left:10px;padding:10px 22px !important;border-radius:24px !important;
  background:linear-gradient(90deg,var(--steel),#2B6BC4);color:#fff !important;
  font-weight:600;box-shadow:0 4px 14px rgba(30,78,140,.3);
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(30,78,140,.4);}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.nav-toggle span{display:block;width:24px;height:2.5px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(34,211,238,.22), transparent 60%),
    radial-gradient(800px 460px at -5% 110%, rgba(255,138,0,.14), transparent 55%),
    linear-gradient(135deg,#141E36 0%, #1E2A4A 55%, #1E4E8C 130%);
  padding:110px 0 120px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 75% 70% at 50% 40%, #000 30%, transparent 75%);
}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;letter-spacing:1px;
  border:1px solid rgba(34,211,238,.45);color:var(--cyan);
  padding:7px 18px;border-radius:20px;margin-bottom:26px;background:rgba(34,211,238,.08);
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 10px var(--orange);animation:pulse 2s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:42px;line-height:1.35;font-weight:700;letter-spacing:1px;margin-bottom:20px;}
.hero h1 .l1,.hero h1 .l2{display:block;white-space:nowrap;}
.hero h1 .grad{
  background:linear-gradient(90deg,var(--cyan) 10%, #7DD3FC 45%, var(--orange) 95%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  display:inline-block;
}
.hero p.lead{font-size:17px;color:rgba(255,255,255,.82);max-width:580px;margin-bottom:36px;}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:14px 32px;border-radius:28px;
  font-size:16px;font-weight:600;transition:all .22s;cursor:pointer;border:none;
}
.btn-primary{background:linear-gradient(90deg,var(--orange),#FFA940);color:#fff;box-shadow:0 6px 20px rgba(255,138,0,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,138,0,.45);}
.btn-ghost{border:1.5px solid rgba(255,255,255,.4);color:#fff;background:transparent;}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(34,211,238,.06);}
.hero-stats{display:flex;gap:44px;margin-top:52px;flex-wrap:wrap;}
.hero-stats .s b{display:block;font-size:32px;font-weight:700;color:#fff;}
.hero-stats .s b em{font-style:normal;color:var(--cyan);}
.hero-stats .s span{font-size:13.5px;color:rgba(255,255,255,.6);letter-spacing:1px;}

/* Hero 右侧:链环节点动画 */
.hero-visual{display:flex;justify-content:center;position:relative;}
.orbit{position:relative;width:400px;height:400px;}
.orbit .ring{
  position:absolute;border-radius:50%;border:1px dashed rgba(34,211,238,.35);
  animation:spin 40s linear infinite;
}
.orbit .ring.r1{inset:0;}
.orbit .ring.r2{inset:52px;animation-duration:28s;animation-direction:reverse;border-color:rgba(255,138,0,.3);}
.orbit .ring.r3{inset:104px;animation-duration:20s;}
@keyframes spin{to{transform:rotate(360deg)}}
.orbit .core{
  position:absolute;inset:150px;border-radius:26px;
  background:linear-gradient(145deg,rgba(34,211,238,.16),rgba(255,138,0,.1));
  border:1px solid rgba(34,211,238,.4);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  box-shadow:0 0 60px rgba(34,211,238,.18), inset 0 0 34px rgba(34,211,238,.08);
}
.orbit .core .k{font-size:11px;letter-spacing:2px;color:var(--cyan);text-align:center;}
.orbit .core .v{font-size:22px;font-weight:700;white-space:nowrap;}
.node{
  position:absolute;width:16px;height:16px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 16px var(--cyan);
}
.node.o{background:var(--orange);box-shadow:0 0 16px var(--orange);}
.node.n1{top:-8px;left:192px;} .node.n2{top:118px;right:-8px;}
.node.n3.o{bottom:104px;left:-8px;} .node.n4{bottom:-8px;left:192px;}
.node.n5{top:118px;left:-8px;} .node.n6.o{top:52px;right:44px;}
.hero-card{
  position:absolute;background:rgba(255,255,255,.08);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:12px 18px;font-size:13px;
}
.hero-card.c1{top:8px;right:-6px;color:var(--cyan);}
.hero-card.c2{bottom:22px;left:-14px;color:#FFB25C;}

/* ---------- 通用 Section ---------- */
section.block{padding:92px 0;}
section.block.alt{background:var(--bg-alt);}
.sec-head{text-align:center;max-width:720px;margin:0 auto 58px;}
.sec-head .kicker{
  display:inline-block;font-size:13px;letter-spacing:4px;color:var(--steel);
  border:1px solid var(--steel-light);background:var(--steel-light);
  padding:5px 16px;border-radius:16px;margin-bottom:18px;font-weight:600;
}
.sec-head h2{font-size:33px;font-weight:700;color:var(--navy);letter-spacing:1px;margin-bottom:14px;}
.sec-head p{color:var(--gray);font-size:16.5px;}
.grid{display:grid;gap:24px;}
.g3{grid-template-columns:repeat(3,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}
.g2{grid-template-columns:1fr 1fr;}

/* ---------- 能力卡片 ---------- */
.cap-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 28px;transition:all .25s;position:relative;overflow:hidden;
}
.cap-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--cyan),var(--steel));opacity:0;transition:.25s;
}
.cap-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent;}
.cap-card:hover::before{opacity:1;}
.cap-card .icon{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;background:var(--steel-light);
}
.cap-card .icon svg{width:28px;height:28px;stroke:var(--steel);}
.cap-card:nth-child(2) .icon{background:var(--orange-soft);}
.cap-card:nth-child(2) .icon svg{stroke:var(--orange);}
.cap-card:nth-child(3) .icon{background:#E9FBF3;}
.cap-card:nth-child(3) .icon svg{stroke:#0E9F6E;}
.cap-card:nth-child(4) .icon{background:#F3E8FF;}
.cap-card:nth-child(4) .icon svg{stroke:#7C3AED;}
.cap-card h3{font-size:19px;color:var(--navy);margin-bottom:10px;font-weight:700;}
.cap-card p{font-size:14.5px;color:var(--gray);}
.cap-card .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px;}
.cap-card .tags span{
  font-size:12px;padding:3px 11px;border-radius:12px;
  background:var(--bg-alt);color:var(--steel);border:1px solid var(--line);
}

/* ---------- 数字带 ---------- */
.band{background:linear-gradient(120deg,var(--navy-deep),var(--steel));color:#fff;padding:64px 0;}
.band .grid{gap:20px;}
.band .cell{text-align:center;padding:10px;}
.band .cell b{font-size:34px;font-weight:700;display:block;line-height:1.15;white-space:nowrap;}
.band .cell b em{font-style:normal;color:var(--cyan);}
.band .cell span{font-size:14px;color:rgba(255,255,255,.65);letter-spacing:2px;}

/* ---------- 案例 ---------- */
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:all .25s;display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.case-card .cover{
  height:190px;position:relative;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:17px;font-weight:600;letter-spacing:2px;
}
.case-card .cover.c1{background:linear-gradient(130deg,#1E4E8C,#22D3EE);}
.case-card .cover.c2{background:linear-gradient(130deg,#B45309,#FF8A00);}
.case-card .cover.c3{background:linear-gradient(130deg,#14532D,#34D399);}
.case-card .cover.c4{background:linear-gradient(130deg,#4C1D95,#A78BFA);}
.case-card .cover .ind{
  position:absolute;top:16px;left:16px;font-size:12px;background:rgba(255,255,255,.2);
  backdrop-filter:blur(4px);padding:4px 12px;border-radius:12px;letter-spacing:1px;font-weight:500;
}
.case-card .body{padding:24px 26px 28px;flex:1;display:flex;flex-direction:column;}
.case-card h3{font-size:18px;color:var(--navy);margin-bottom:10px;}
.case-card p{font-size:14px;color:var(--gray);flex:1;}
.case-card .metrics{display:flex;gap:22px;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);}
.case-card .metrics div b{font-size:21px;color:var(--orange);font-weight:700;}
.case-card .metrics div span{display:block;font-size:12px;color:var(--gray);}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative;}
.flow::before{
  content:"";position:absolute;top:34px;left:8%;right:8%;height:2px;
  background:repeating-linear-gradient(90deg,var(--steel-light) 0 10px,transparent 10px 20px);
}
.step{text-align:center;position:relative;}
.step .num{
  width:68px;height:68px;border-radius:50%;margin:0 auto 16px;
  background:#fff;border:2px solid var(--steel-light);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;color:var(--steel);position:relative;z-index:1;transition:.25s;
}
.step:hover .num{border-color:var(--orange);color:var(--orange);box-shadow:0 8px 22px rgba(255,138,0,.2);}
.step h4{font-size:16.5px;color:var(--navy);margin-bottom:6px;}
.step p{font-size:13px;color:var(--gray);}

/* ---------- CTA ---------- */
.cta{
  position:relative;overflow:hidden;border-radius:20px;color:#fff;text-align:center;
  background:
    radial-gradient(700px 300px at 90% 0%, rgba(34,211,238,.25), transparent 60%),
    radial-gradient(600px 300px at 5% 100%, rgba(255,138,0,.22), transparent 55%),
    linear-gradient(120deg,#141E36,#1E4E8C);
  padding:70px 40px;
}
.cta h2{font-size:31px;margin-bottom:14px;font-weight:700;}
.cta p{color:rgba(255,255,255,.75);margin-bottom:32px;font-size:16.5px;}

/* ---------- 页脚 ---------- */
footer{background:var(--navy-deep);color:rgba(255,255,255,.68);padding:64px 0 0;font-size:14px;}
footer .grid{gap:40px;}
footer h4{color:#fff;font-size:15.5px;margin-bottom:18px;letter-spacing:1px;}
footer li{margin-bottom:10px;}
footer a:hover{color:var(--cyan);}
footer .fbrand img{background:#fff;border-radius:10px;padding:7px;height:52px;width:auto;margin-bottom:14px;}
footer .fbrand p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.55);}
.fbottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:rgba(255,255,255,.4);
}
.fbottom a.icp{color:rgba(255,255,255,.4);text-decoration:none;}
.fbottom a.icp:hover{color:var(--cyan);}

/* ---------- 内页 ---------- */
.page-hero{
  background:
    radial-gradient(900px 420px at 88% -20%, rgba(34,211,238,.2), transparent 60%),
    linear-gradient(125deg,#141E36,#1E2A4A 60%,#1E4E8C 140%);
  color:#fff;padding:76px 0 66px;
}
.page-hero h1{font-size:36px;font-weight:700;margin-bottom:12px;}
.page-hero .crumb{font-size:13px;color:rgba(255,255,255,.55);margin-bottom:22px;letter-spacing:1px;}
.page-hero .crumb a:hover{color:var(--cyan);}
.page-hero p{color:rgba(255,255,255,.78);max-width:760px;font-size:16.5px;}

/* 解决方案 */
.sol-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;}
.sol-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);}
.sol-card .head{padding:26px 28px 20px;color:#fff;}
.sol-card .head h3{font-size:20px;font-weight:700;}
.sol-card .head span{font-size:13px;opacity:.85;letter-spacing:1px;}
.sol-card .body{padding:24px 28px 28px;}
.sol-card .body ul{margin-bottom:18px;}
.sol-card .body li{
  position:relative;padding-left:22px;font-size:14.5px;color:var(--gray);margin-bottom:9px;
}
.sol-card .body li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--cyan),var(--steel));transform:rotate(45deg);
}
.sol-card .body .val{
  display:inline-block;font-size:13px;color:var(--orange);background:var(--orange-soft);
  padding:5px 14px;border-radius:14px;font-weight:600;
}

/* 技术栈 */
.tech-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px;}
.tech-row span{
  font-size:12.5px;padding:5px 14px;border-radius:14px;background:#fff;
  border:1px solid var(--line);color:var(--gray);
}

/* 新闻 */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column;}
.news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);}
.news-card .thumb{height:170px;background:linear-gradient(130deg,var(--navy),var(--steel));display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.85);font-size:15px;letter-spacing:2px;}
.news-card .body{padding:22px 24px 26px;flex:1;display:flex;flex-direction:column;}
.news-card .date{font-size:12.5px;color:var(--orange);letter-spacing:1px;margin-bottom:8px;font-weight:600;}
.news-card h3{font-size:17.5px;color:var(--navy);margin-bottom:10px;line-height:1.55;}
.news-card p{font-size:13.5px;color:var(--gray);flex:1;}
.news-card .more{margin-top:16px;font-size:13.5px;color:var(--steel);font-weight:600;}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:start;}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;}
.info-item{display:flex;gap:16px;margin-bottom:24px;}
.info-item:last-child{margin-bottom:0;}
.info-item .ic{
  width:46px;height:46px;border-radius:12px;background:var(--steel-light);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.info-item .ic svg{width:22px;height:22px;stroke:var(--steel);}
.info-item b{display:block;font-size:15px;color:var(--navy);margin-bottom:3px;}
.info-item span{font-size:14px;color:var(--gray);}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;}
.form-card h3{font-size:20px;color:var(--navy);margin-bottom:22px;}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.form-card input,.form-card select,.form-card textarea{
  width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;
  font-size:14.5px;font-family:inherit;color:var(--ink);background:var(--bg-alt);transition:.2s;
}
.form-card input:focus,.form-card select:focus,.form-card textarea:focus{
  outline:none;border-color:var(--steel);background:#fff;box-shadow:0 0 0 4px rgba(30,78,140,.08);
}
.form-card textarea{min-height:120px;resize:vertical;}
.form-note{font-size:12.5px;color:var(--gray);margin-top:14px;}
.form-ok{
  display:none;background:#E9FBF3;border:1px solid #A7F3D0;color:#065F46;
  padding:14px 18px;border-radius:10px;font-size:14px;margin-bottom:16px;
}

/* 关于页 */
.about-lead{font-size:19px;line-height:2;color:var(--ink);max-width:860px;}
.about-lead b{color:var(--steel);}
.mv-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;transition:.25s;}
.mv-card:hover{box-shadow:var(--shadow-hover);}
.mv-card .k{font-size:13px;letter-spacing:3px;color:var(--orange);font-weight:700;margin-bottom:10px;}
.mv-card h3{font-size:22px;color:var(--navy);margin-bottom:12px;}
.mv-card p{color:var(--gray);font-size:15px;}
.timeline{position:relative;padding-left:34px;}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--cyan),var(--orange));}
.tl-item{position:relative;margin-bottom:30px;}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:8px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--steel);
}
.tl-item .y{font-size:15px;font-weight:700;color:var(--orange);margin-bottom:4px;}
.tl-item h4{font-size:17px;color:var(--navy);margin-bottom:5px;}
.tl-item p{font-size:14px;color:var(--gray);}

/* 文章页 */
.article{max-width:820px;margin:0 auto;}
.article h2{font-size:22px;color:var(--navy);margin:36px 0 14px;}
.article p{color:#374151;margin-bottom:16px;}
.article ul{margin:0 0 16px 22px;list-style:disc;}
.article li{margin-bottom:6px;color:#374151;}
.article blockquote{
  border-left:4px solid var(--orange);background:var(--orange-soft);
  padding:14px 20px;border-radius:0 10px 10px 0;color:#7C4A03;margin:18px 0;font-size:15px;
}
.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;}
.article th{background:var(--steel-light);color:var(--steel);padding:10px 14px;text-align:left;font-weight:600;}
.article td{padding:10px 14px;border-bottom:1px solid var(--line);}

/* 动画：默认内容完全可见；仅在 JS 就绪后才启用渐入，避免内容"消失" */
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
html.js .reveal.on{opacity:1;transform:none;}

/* 响应式 */
@media (max-width:1000px){
  .hero .container{grid-template-columns:1fr;}
  .hero-visual{display:none;}
  .g4{grid-template-columns:repeat(2,1fr);}
  .g3{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);}
  .flow::before{display:none;}
  .contact-grid{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .nav-links{
    display:none;position:absolute;top:72px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:14px 20px 20px;
    border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(20,32,64,.1);
  }
  .nav-links.open{display:flex;}
  .nav-toggle{display:block;}
  .hero h1{font-size:29px;}
  .hero h1 .l1,.hero h1 .l2{white-space:normal;display:inline;}
  .hero p.lead{font-size:15.5px;}
  .g3,.g4,.g2,.frow{grid-template-columns:1fr;}
  section.block{padding:64px 0;}
  .hero{padding:72px 0 84px;}
  .hero-stats{gap:26px;}
  .sec-head h2{font-size:26px;}
  .band .cell b{font-size:34px;}
}