/* ═══ 浩瀚集团官网 设计稿V5 · 深色科技风 · 首页＋关于我们合并（精简版） ═══ */
:root{
  --bg:#05070E; --panel:rgba(255,255,255,.032); --panel2:rgba(255,255,255,.055);
  --line:rgba(132,170,255,.12); --line2:rgba(132,170,255,.24);
  --blue:#3B82F6; --violet:#7C5CF5; --cyan:#22D3EE;
  --text:#E6EDFA; --muted:#8E9EBB;
  --grad:linear-gradient(115deg,#3B82F6,#7C5CF5 55%,#22D3EE);
  --shadow:0 16px 44px rgba(0,0,0,.42);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.85;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 40px}
img{max-width:100}
::selection{background:rgba(59,130,246,.4)}

/* 顶部提示条 */
.draft-bar{background:rgba(59,130,246,.14);color:#B9C8E4;text-align:center;font-size:12.5px;padding:9px 16px;letter-spacing:.12em;border-bottom:1px solid var(--line)}
.draft-bar b{color:#7FD7FF}

/* 导航 */
header{position:sticky;top:0;z-index:100;background:rgba(6,10,20,.8);backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{font-size:22px;font-weight:800;color:#fff;letter-spacing:.02em}
.logo span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo small{display:block;font-size:9.5px;font-weight:400;color:var(--muted);letter-spacing:.3em;margin-top:3px}
nav{display:flex;gap:28px;align-items:center}
nav a{font-size:14.5px;color:#B6C4DD;font-weight:500;padding:6px 0;position:relative;transition:.2s}
nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--grad);transition:.25s;border-radius:2px}
nav a:hover{color:#fff}nav a:hover::after{width:100%}
nav a.active{color:#fff;font-weight:700}nav a.active::after{width:100%}
.nav-cta{background:var(--grad);color:#fff !important;padding:10px 22px;border-radius:22px;font-weight:700;box-shadow:0 8px 24px rgba(59,130,246,.36)}
.nav-cta::after{display:none}
#menuBtn{display:none;background:none;border:1px solid var(--line2);border-radius:10px;font-size:19px;color:#fff;padding:6px 13px;cursor:pointer}
.m-menu{display:none}

/* 背景 */
.bg-layer{position:fixed;inset:0;z-index:0;pointer-events:none;background:
  radial-gradient(1000px 560px at 18% -8%,rgba(59,130,246,.17),transparent 64%),
  radial-gradient(820px 460px at 86% 6%,rgba(124,92,245,.12),transparent 64%),
  linear-gradient(180deg,#05070E 0%,#070C18 55%,#05070E 100%)}
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(120,165,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,165,255,.05) 1px,transparent 1px);
  background-size:80px 80px;mask-image:radial-gradient(ellipse 78% 55% at 50% 26%,#000 18%,transparent 78%)}
main,footer{position:relative;z-index:1}

/* HERO */
.hero{padding:120px 0 88px}
.kicker{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:.24em;color:#8FD2FF;border:1px solid rgba(59,130,246,.36);background:rgba(59,130,246,.07);padding:8px 20px;border-radius:22px;margin-bottom:30px}
.kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:#40E0FF;box-shadow:0 0 12px #40E0FF}
.hero h1{font-size:56px;font-weight:800;line-height:1.26;letter-spacing:.01em;color:#fff;max-width:960px}
.hero h1 em{font-style:normal;background:linear-gradient(96deg,#5B9BFF 8%,#9C7BFF 52%,#4FD8F5 96%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:18px;color:#AFBEDA;margin-top:26px;max-width:900px}
.hero .sub b{color:#fff}
.hero-cta{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:15px 34px;border-radius:30px;font-size:16px;font-weight:700;transition:.25s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 34px rgba(59,130,246,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 46px rgba(59,130,246,.55)}
.btn-ghost{border:1.5px solid rgba(150,185,255,.32);color:#E6EDFA;background:rgba(255,255,255,.04)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(150,185,255,.55);transform:translateY(-3px)}

/* 关键数据条 */
.stats{margin-top:66px;display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.03);overflow:hidden}
.stats .s{padding:26px 28px;border-right:1px solid var(--line)}
.stats .s:last-child{border-right:none}
.stats b{display:block;font-size:24px;font-weight:800;color:#fff;letter-spacing:.01em}
.stats b i{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:13px;color:var(--muted)}

/* 区块 */
.sec{padding:96px 0}
.cap{display:flex;align-items:baseline;gap:13px;font-size:12.5px;letter-spacing:.24em;color:#6F87AD;margin-bottom:16px}
.cap i{font-style:normal;font-family:Consolas,monospace;color:#5B9BFF;font-weight:700}
.sec h2{font-size:36px;font-weight:800;color:#fff;line-height:1.34}
.sec h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec .lead{font-size:16.5px;color:#A6B6D2;margin-top:14px;max-width:820px}
.sec-head{margin-bottom:44px}

/* 公司简介 */
.about{display:grid;grid-template-columns:1.4fr 1fr;gap:56px}
.about .body p{font-size:15.5px;color:#B4C2DC;margin-bottom:16px}
.about .body p:last-child{margin-bottom:0}
.about .facts{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:26px 26px}
.about .facts .row{display:flex;gap:16px;font-size:13.5px;padding:12px 0;border-bottom:1px dashed rgba(132,170,255,.14)}
.about .facts .row:last-child{border-bottom:none;padding-bottom:0}
.about .facts .row:first-child{padding-top:0}
.about .facts .k{color:var(--muted);min-width:66px;flex:none}
.about .facts .v{color:#DCE6F7}

/* 业务板块 */
.biz{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.b-card{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:26px 24px;transition:.25s}
.b-card:hover{transform:translateY(-4px);border-color:var(--line2);background:rgba(59,130,246,.07);box-shadow:var(--shadow)}
.b-card h3{font-size:17px;color:#fff;margin-bottom:10px}
.b-card ul{list-style:none}
.b-card li{font-size:13.5px;color:#98A8C5;padding-left:14px;position:relative;margin-bottom:6px}
.b-card li::before{content:"";position:absolute;left:0;top:12px;width:5px;height:5px;border-radius:50%;background:#5B9BFF;opacity:.8}
.b-card .go{display:inline-block;margin-top:14px;font-size:13px;color:#7FD7FF;font-weight:600}

/* 专业能力与成果 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:44px}
.c-cell{border-left:2px solid rgba(91,155,255,.55);padding:4px 0 4px 20px}
.c-cell h4{font-size:16.5px;color:#fff;margin-bottom:8px}
.c-cell p{font-size:13.5px;color:#98A8C5}
.res{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.r-cell{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:24px 22px}
.r-cell .num{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.35}
.r-cell .who{font-size:13.5px;color:#DCE6F7;margin-top:8px}
.r-cell .scope{font-size:12.5px;color:var(--muted);margin-top:5px}

/* 合作流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.f-step{border:1px solid var(--line);border-radius:15px;background:var(--panel);padding:22px 20px}
.f-step .n{font-family:Consolas,monospace;font-size:18px;font-weight:700;color:#5B9BFF}
.f-step h4{font-size:15px;color:#fff;margin:10px 0 8px}
.f-step p{font-size:12.8px;color:#93A2BD}
.note-line{margin-top:26px;font-size:13.5px;color:#93A2BD;border-top:1px solid var(--line);padding-top:20px}
.note-line b{color:#B9C8E4;font-weight:600}

/* FAQ */
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:20px 0;font-size:16px;font-weight:600;color:#E6EDFA;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"＋";color:#5B9BFF;flex:none}
.faq details[open] summary::after{content:"－"}
.faq .a{font-size:14.5px;color:#A6B6D2;padding-bottom:22px;max-width:900px}

/* CTA */
.cta{padding:96px 0 88px;text-align:center;border-top:1px solid var(--line);position:relative;overflow:hidden}
.cta .glow{position:absolute;inset:0;background:radial-gradient(720px 340px at 50% 0%,rgba(59,130,246,.18),transparent 72%)}
.cta .wrap{position:relative;z-index:1}
.cta h2{font-size:34px;font-weight:800;color:#fff;line-height:1.4}
.cta h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cta p{color:#A6B6D2;margin-top:14px;font-size:16px}
.cta .hero-cta{justify-content:center;margin-top:32px}
.contact-line{margin-top:34px;font-size:14px;color:#9DAECB}
.contact-line b{color:#fff;font-weight:600}
.contact-line span{margin:0 14px}

/* Footer */
footer{border-top:1px solid var(--line);background:rgba(4,7,14,.7);padding:56px 0 28px}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
footer .brand{font-size:20px;font-weight:800;color:#fff}
footer .brand span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
footer p{font-size:13.5px;color:var(--muted)}
footer h5{font-size:14px;color:#fff;margin-bottom:16px}
footer .cols a{display:block;font-size:13.5px;color:#9DAECB;margin-bottom:10px}
footer .cols a:hover{color:#7FD7FF}
footer .copy{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font-size:12.5px;color:#6F87AD;text-align:center}

/* ═══ 响应式 ═══ */
@media(max-width:1100px){
  nav{display:none}
  #menuBtn{display:block}
  .m-menu{display:none;flex-direction:column;padding:10px 24px 22px;border-top:1px solid var(--line);background:rgba(6,10,20,.98)}
  .m-menu.open{display:flex}
  .m-menu a{padding:13px 4px;font-size:15.5px;color:#C6D3EA;border-bottom:1px solid rgba(132,170,255,.1)}
  .about{grid-template-columns:1fr;gap:32px}
  .biz,.res{grid-template-columns:1fr 1fr}
  .cap-grid{grid-template-columns:1fr;gap:22px}
  .flow{grid-template-columns:1fr 1fr 1fr}
  footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .wrap{padding:0 20px}
  .hero{padding:56px 0 44px}
  .draft-bar{font-size:11px;letter-spacing:.05em}
  .sec{padding:56px 0}
  .sec h2{font-size:25px}
  .sec .lead{font-size:15px}
  .sec-head{margin-bottom:30px}
  .kicker{font-size:11px;letter-spacing:.16em;padding:7px 15px;margin-bottom:22px}
  .hero h1{font-size:30px}
  .hero .sub{font-size:15px;margin-top:18px}
  .hero-cta{margin-top:28px;gap:12px}
  .btn{padding:13px 26px;font-size:15px;flex:1 1 auto;text-align:center}
  .stats{margin-top:34px;grid-template-columns:1fr}
  .stats .s{padding:14px 18px;border-right:none;border-bottom:1px solid var(--line)}
  .stats .s:last-child{border-bottom:none}
  .stats b{font-size:19px}
  .stats span{font-size:12.5px}
  .about .body p{font-size:14.5px}
  /* 手机：横向滑动行，避免页面过长 */
  .biz,.res,.flow,.cap-grid{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;margin:0 -20px;padding:0 20px 10px;scrollbar-width:none}
  .biz::-webkit-scrollbar,.res::-webkit-scrollbar,.flow::-webkit-scrollbar,.cap-grid::-webkit-scrollbar{display:none}
  .b-card,.r-cell,.f-step{flex:0 0 74%;scroll-snap-align:start;padding:22px 20px}
  .cap-grid{margin-bottom:26px}
  .c-cell{flex:0 0 78%;scroll-snap-align:start;padding-right:6px}
  .faq summary{font-size:15px;padding:17px 0}
  .faq .a{font-size:14px;padding-bottom:18px}
  .cta{padding:60px 0}
  .cta h2{font-size:23px}
  .cta p{font-size:15px}
  .contact-line{font-size:13.5px}
  .contact-line span{display:block;margin:6px 0}
  footer{padding:40px 0 22px}
  footer .cols{grid-template-columns:1fr 1fr;gap:22px 18px}
  footer .cols>div:first-child{grid-column:1 / -1}
  footer .cols a{margin-bottom:8px;font-size:13px}
  footer h5{margin-bottom:12px}
}