/* ===== 嘉兴蜂鸟 HUMMINGBIRD · 高端科幻风 ===== */
:root{
  --bg:#05070f;
  --bg-2:#080c18;
  --panel:rgba(18,26,46,.55);
  --panel-line:rgba(120,170,255,.16);
  --text:#e8eefc;
  --muted:#93a2c4;
  --cyan:#3ee6ff;
  --blue:#4d8bff;
  --violet:#9b6bff;
  --grad:linear-gradient(120deg,#3ee6ff 0%,#4d8bff 45%,#9b6bff 100%);
  --glow:0 0 24px rgba(77,139,255,.35);
  --radius:18px;
  --maxw:1180px;
  --font:"Segoe UI",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
em{font-style:normal}

/* ===== 动态背景 ===== */
#bg-canvas{position:fixed;inset:0;z-index:0;opacity:.55}
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(90,140,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(90,140,255,.06) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
}
.bg-glow{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 78% 8%,rgba(155,107,255,.20),transparent 60%),
    radial-gradient(560px 380px at 12% 18%,rgba(62,230,255,.16),transparent 60%),
    radial-gradient(900px 600px at 50% 105%,rgba(77,139,255,.18),transparent 60%);
  filter:blur(8px);
}
main,header,footer{position:relative;z-index:2}

/* ===== 通用 ===== */
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.32em;font-weight:700;
  color:var(--cyan);text-transform:uppercase;margin-bottom:14px;
  padding:5px 12px;border:1px solid var(--panel-line);border-radius:999px;
  background:rgba(62,230,255,.06);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;
  cursor:pointer;border:1px solid transparent;transition:.25s ease;white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#04101f;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(77,139,255,.55)}
.btn-line{border-color:var(--panel-line);color:var(--text);background:rgba(255,255,255,.02)}
.btn-line:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:var(--glow)}
.btn-ghost{border:1px solid var(--panel-line);color:var(--text);padding:9px 18px;font-size:14px}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.full{width:100%}

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:.3s ease;backdrop-filter:blur(0px);
}
.nav.scrolled{
  background:rgba(6,10,20,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--panel-line);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:18px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark svg{display:block}
.bm-core{fill:var(--cyan)}
.bm-ring{fill:none;stroke:var(--blue);stroke-width:1.4;opacity:.8;transform-origin:16px 16px;animation:spin 9s linear infinite}
.bm-ring2{stroke:var(--cyan);animation-duration:12s;animation-direction:reverse}
.bm-ring3{stroke:var(--violet);animation-duration:15s}
@keyframes spin{to{transform:rotate(360deg)}}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{font-size:18px;letter-spacing:.04em}
.brand-text em{font-size:11px;letter-spacing:.34em;color:var(--muted)}
.nav-links{display:flex;gap:30px}
.nav-links a{font-size:15px;color:var(--muted);position:relative;padding:4px 0;transition:.2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--grad);transition:.25s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.25s}

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;
  text-align:center;padding:120px 24px 80px;position:relative}
.hero-inner{max-width:880px}
.hero-title{font-size:clamp(38px,6.4vw,76px);line-height:1.08;font-weight:800;letter-spacing:-.01em;margin-bottom:24px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 22px rgba(77,139,255,.4))}
.hero-sub{color:var(--muted);font-size:clamp(15px,2vw,19px);max-width:640px;margin:0 auto 36px}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-meta{display:flex;gap:42px;justify-content:center;flex-wrap:wrap;margin-top:64px}
.hero-meta div{display:flex;flex-direction:column;align-items:center}
.hero-meta b{font-size:clamp(28px,4vw,40px);font-weight:800;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-meta b span{font-size:.6em}
.hero-meta i{font-style:normal;color:var(--muted);font-size:13px;margin-top:4px;letter-spacing:.05em}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);
  color:var(--muted);font-size:12px;letter-spacing:.2em;display:flex;flex-direction:column;align-items:center;gap:8px}
.scroll-hint span{width:1px;height:38px;background:linear-gradient(var(--cyan),transparent);animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* ===== 区块通用 ===== */
.section{max-width:var(--maxw);margin:0 auto;padding:110px 24px}
.section-alt{
  max-width:none;background:
    linear-gradient(180deg,rgba(10,15,28,.0),rgba(10,15,28,.6) 50%,rgba(10,15,28,0));
  border-top:1px solid var(--panel-line);border-bottom:1px solid var(--panel-line);
}
.section-alt>*{max-width:var(--maxw);margin-left:auto;margin-right:auto}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-head h2{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.01em}
.section-head p{color:var(--muted);margin-top:16px;font-size:16px}

/* ===== 卡片网格 ===== */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{
  position:relative;padding:30px 26px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--panel-line);
  backdrop-filter:blur(10px);overflow:hidden;transition:.3s ease;
}
.card::before{content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 50px rgba(5,10,25,.6)}
.card:hover::before{opacity:.9}
.card-ico{font-size:30px;width:60px;height:60px;display:grid;place-items:center;border-radius:14px;
  background:rgba(62,230,255,.08);border:1px solid var(--panel-line);margin-bottom:18px}
.card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}
.tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tags li{font-size:12px;color:var(--cyan);padding:4px 10px;border:1px solid var(--panel-line);
  border-radius:999px;background:rgba(62,230,255,.05)}

/* ===== 核心能力 ===== */
.cap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:8px}
.cap{padding:30px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--panel-line);
  position:relative;overflow:hidden;transition:.3s}
.cap:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.4)}
.cap-num{font-size:46px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;
  color:transparent;opacity:.85;line-height:1}
.cap h3{font-size:20px;margin:14px 0 8px}
.cap p{color:var(--muted);font-size:15px}

/* ===== 案例 ===== */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{border-radius:var(--radius);overflow:hidden;background:var(--panel);border:1px solid var(--panel-line);
  transition:.3s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-6px);box-shadow:0 18px 50px rgba(5,10,25,.6);border-color:rgba(120,170,255,.4)}
.case-visual{height:170px;position:relative;overflow:hidden}
.case-a{background:radial-gradient(circle at 30% 30%,rgba(62,230,255,.5),transparent 60%),linear-gradient(135deg,#0a2a3a,#06203a)}
.case-b{background:radial-gradient(circle at 70% 30%,rgba(155,107,255,.5),transparent 60%),linear-gradient(135deg,#241046,#0e0a2e)}
.case-c{background:radial-gradient(circle at 40% 70%,rgba(77,139,255,.5),transparent 60%),linear-gradient(135deg,#0a1f4a,#0a1230)}
.case-visual::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:26px 26px;opacity:.5}
.case-tag{position:absolute;top:14px;left:14px;z-index:2;font-size:12px;letter-spacing:.1em;
  padding:5px 12px;border-radius:999px;background:rgba(5,10,20,.6);border:1px solid var(--panel-line);color:var(--cyan)}
.case-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:18px;font-weight:700}
.case-body p{color:var(--muted);font-size:14.5px;flex:1}
.case-metrics{display:flex;align-items:baseline;gap:8px}
.case-metrics b{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.case-metrics i{font-style:normal;color:var(--muted);font-size:13px}

/* ===== 关于我们 ===== */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.about-text h2{font-size:clamp(28px,4vw,42px);font-weight:800;margin-bottom:18px}
.about-text p{color:var(--muted);margin-bottom:14px;font-size:15.5px}
.about-values{display:flex;flex-wrap:wrap;gap:14px;margin-top:20px;color:var(--cyan);font-size:14px}
.about-visual{display:grid;place-items:center;min-height:320px}
.orbit{position:relative;width:300px;height:300px;display:grid;place-items:center}
.o-core{width:54px;height:54px;border-radius:50%;background:var(--grad);box-shadow:0 0 40px rgba(77,139,255,.6);position:absolute}
.o-ring{position:absolute;border:1px solid rgba(120,170,255,.3);border-radius:50%}
.r1{width:140px;height:140px;animation:spin 14s linear infinite}
.r2{width:210px;height:210px;animation:spin 22s linear infinite reverse;border-color:rgba(62,230,255,.25)}
.r3{width:286px;height:286px;animation:spin 30s linear infinite;border-color:rgba(155,107,255,.22)}
.o-dot{position:absolute;width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan)}
.d1{top:8px;left:50%;transform:translateX(-50%)}
.d2{bottom:24px;right:34px;background:var(--violet);box-shadow:0 0 14px var(--violet)}
.d3{top:120px;left:6px;background:var(--blue);box-shadow:0 0 14px var(--blue)}

/* ===== 联系我们 ===== */
.contact{display:grid;grid-template-columns:1.2fr .8fr;gap:34px;align-items:start}
.contact-form{padding:34px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--panel-line);
  display:flex;flex-direction:column;gap:18px;backdrop-filter:blur(10px)}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--muted);letter-spacing:.05em}
.field input,.field textarea{
  background:rgba(5,10,20,.5);border:1px solid var(--panel-line);border-radius:12px;
  padding:13px 15px;color:var(--text);font-size:15px;font-family:inherit;resize:vertical;transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(62,230,255,.12)}
.form-note{color:var(--cyan);font-size:14px;text-align:center}
.contact-info{display:flex;flex-direction:column;gap:18px}
.ci-item{display:flex;gap:16px;padding:18px 20px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--panel-line)}
.ci-ico{font-size:22px}
.ci-item b{font-size:14px;color:var(--text);display:block;margin-bottom:2px}
.ci-item p{color:var(--muted);font-size:14px}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--panel-line);background:rgba(6,10,20,.6);margin-top:40px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:54px 24px 30px;display:grid;
  grid-template-columns:1.2fr 2fr;gap:40px}
.footer-brand p{color:var(--muted);font-size:14px;margin-top:12px;max-width:280px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h4{font-size:14px;margin-bottom:14px;color:var(--text)}
.footer-cols a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:.2s}
.footer-cols a:hover{color:var(--cyan)}
.footer-bar{max-width:var(--maxw);margin:0 auto;padding:18px 24px;border-top:1px solid var(--panel-line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px}

/* ===== 滚动入场动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.show{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .grid-3,.cases{grid-template-columns:repeat(2,1fr)}
  .cap-grid{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:30px}
  .contact{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media(max-width:680px){
  .nav-links{position:fixed;top:68px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(6,10,20,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--panel-line);
    padding:10px 0;transform:translateY(-120%);transition:.3s;z-index:40}
  .nav-links.open{transform:none}
  .nav-links a{padding:14px 24px;width:100%}
  .nav-toggle{display:flex}
  .grid-3,.cases{grid-template-columns:1fr}
  .hero-meta{gap:26px}
  .section{padding:80px 20px}
  .footer-cols{grid-template-columns:1fr 1fr}
  .footer-bar{justify-content:center;text-align:center}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}