/* 河北羽川科技有限公司 · 羽川科技官网（深色科技风） */
:root{
  --bg:#06080f;
  --panel:#0c111c;
  --panel-2:#101827;
  --line:rgba(255,255,255,.09);
  --text:#e9edf6;
  --muted:#9aa6bf;
  --cyan:#3ce0d0;
  --violet:#7b61ff;
  --radius:18px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:min(var(--max),calc(100% - 48px));margin:0 auto}
.eyebrow{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);font-weight:600}
h1,h2,h3{margin:0;line-height:1.25;letter-spacing:-.02em}
h1{font-size:clamp(34px,5vw,58px);font-weight:800}
h2{font-size:clamp(26px,3.4vw,38px);font-weight:750}
h3{font-size:19px;font-weight:700}
p{margin:0;color:var(--muted)}
.lead{font-size:clamp(16px,1.6vw,19px);color:#c3ccdd;max-width:640px}

/* 顶栏 */
.nav{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(14px);background:rgba(6,8,15,.72);
  border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  background:conic-gradient(from 210deg,var(--cyan),var(--violet),var(--cyan));
  box-shadow:0 0 26px rgba(60,224,208,.35);
}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.18em;text-transform:uppercase}
.menu{display:flex;gap:6px;align-items:center}
.menu a{padding:9px 14px;border-radius:999px;font-size:14px;color:#c3ccdd;transition:.2s}
.menu a:hover{background:rgba(255,255,255,.06);color:#fff}
.menu a.on{background:linear-gradient(120deg,rgba(60,224,208,.16),rgba(123,97,255,.18));color:#fff;border:1px solid rgba(60,224,208,.25)}
.nav-cta{margin-left:8px;padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;
  background:linear-gradient(120deg,var(--cyan),var(--violet));color:#051018}
.nav-cta:hover{filter:brightness(1.08)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:none;color:var(--text);font-size:20px}

/* 首屏 */
.hero{position:relative;overflow:hidden;padding:clamp(72px,10vw,132px) 0 clamp(64px,7vw,96px)}
.hero:before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(700px 420px at 12% 0%,rgba(123,97,255,.28),transparent 62%),
    radial-gradient(760px 460px at 92% 18%,rgba(60,224,208,.22),transparent 64%),
    linear-gradient(180deg,transparent,rgba(6,8,15,.9));
}
.grid-bg{
  position:absolute;inset:0;z-index:0;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
                    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
}
.hero .wrap{position:relative;z-index:2}
.hero h1{margin:18px 0 22px}
.hero h1 em{font-style:normal;background:linear-gradient(96deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin-bottom:34px}
.actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:999px;font-weight:650;font-size:15px;transition:.22s}
.btn-primary{background:linear-gradient(120deg,var(--cyan),var(--violet));color:#04121a;box-shadow:0 10px 34px rgba(60,224,208,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(60,224,208,.3)}
.btn-ghost{border:1px solid var(--line);color:#dbe3f2;background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:rgba(60,224,208,.45);background:rgba(60,224,208,.06)}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:56px}
.stat{padding:20px 22px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.03)}
.stat b{display:block;font-size:26px;font-weight:800;color:#fff}
.stat span{font-size:12.5px;color:var(--muted)}

/* 通用区块 */
.section{padding:clamp(64px,8vw,104px) 0}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,.022),transparent);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;gap:32px;align-items:flex-end;margin-bottom:42px}
.sec-head p{max-width:520px}
.cards{display:grid;gap:18px}
.cards.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cards.c4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  position:relative;padding:28px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  overflow:hidden;transition:.25s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(60,224,208,.35);box-shadow:0 18px 48px rgba(0,0,0,.45)}
.card:after{content:"";position:absolute;left:0;top:0;height:2px;width:100%;
  background:linear-gradient(90deg,var(--cyan),var(--violet));opacity:.0;transition:.25s}
.card:hover:after{opacity:1}
.card .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(60,224,208,.1);border:1px solid rgba(60,224,208,.22);color:var(--cyan)}
.card p{font-size:14.5px;margin-top:10px}
.card ul{margin:14px 0 0;padding-left:18px;color:var(--muted);font-size:14px}
.card li{margin:6px 0}

/* 能力清单 */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.list{display:grid;gap:0;border-top:1px solid var(--line)}
.list-row{display:flex;gap:20px;padding:22px 4px;border-bottom:1px solid var(--line);align-items:flex-start}
.list-row .no{font-size:12px;letter-spacing:.16em;color:var(--cyan);min-width:42px;padding-top:3px}
.list-row h3{margin-bottom:5px}
.list-row p{font-size:14px}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:s}
.step{padding:26px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.03)}
.step:before{counter-increment:s;content:"0" counter(s);display:block;font-size:12px;letter-spacing:.2em;color:var(--violet);margin-bottom:14px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:13.6px}

/* CTA */
.cta-band{margin:0 auto;padding:clamp(40px,5vw,64px);border-radius:24px;
  background:linear-gradient(120deg,rgba(60,224,208,.14),rgba(123,97,255,.16));
  border:1px solid rgba(60,224,208,.24);display:flex;gap:28px;justify-content:space-between;align-items:center;flex-wrap:wrap}
.cta-band h2{max-width:640px}

/* 页脚 */
.site-footer{margin-top:0;padding:56px 0 34px;border-top:1px solid var(--line);background:#04060b}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:36px}
.footer-grid .brand{font-size:19px;font-weight:800;margin-bottom:12px}
.footer-grid p{font-size:13.5px;line-height:1.9}
.footer-grid h4{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:#7d8aa6;margin:0 0 14px;font-weight:600}
.footer-grid a{display:block;font-size:13.5px;color:#b9c4d8;padding:4px 0}
.footer-grid a:hover{color:var(--cyan)}
.legal{margin-top:38px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7d8aa6}
.legal a{color:#a9b5cc}
.legal a:hover{color:var(--cyan)}

/* 内页头 */
.page-head{padding:clamp(68px,9vw,112px) 0 clamp(40px,5vw,64px);
  border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.page-head:before{content:"";position:absolute;inset:0;
  background:radial-gradient(620px 300px at 18% 0%,rgba(123,97,255,.22),transparent 65%)}
.page-head .wrap{position:relative}
.page-head h1{font-size:clamp(30px,4.2vw,48px);margin:14px 0 16px}

/* 关于页 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.info-table{width:100%;border-collapse:collapse;font-size:14px}
.info-table td{padding:13px 0;border-bottom:1px solid var(--line);vertical-align:top}
.info-table td:first-child{color:var(--muted);width:130px}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.contact-card{padding:30px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.03)}
.contact-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-item:last-child{border-bottom:0}
.contact-item .k{font-size:12px;letter-spacing:.16em;color:var(--cyan);min-width:70px;padding-top:2px}
.contact-item .v{font-size:14.5px;color:#d6deee;word-break:break-all}

/* 动效 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:980px){
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .cards.c4{grid-template-columns:repeat(2,1fr)}
  .split,.about-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .menu{
    position:absolute;top:72px;right:24px;left:24px;flex-direction:column;align-items:stretch;
    padding:14px;border:1px solid var(--line);border-radius:16px;background:#0a0f1a;display:none
  }
  .menu.open{display:flex}
  .burger{display:block}
  .nav-cta{display:none}
}
@media (max-width:620px){
  .cards.c2,.steps{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start}
  .hero-stats{grid-template-columns:1fr 1fr}
  .cta-band{padding:28px}
}