/* ============ 神火软辰 官网样式 ============ */
:root{
  --bg:#05060a;            /* 深空黑 */
  --bg2:#080b14;
  --panel:#0b0f1c;
  --panel2:#0e1322;
  --cyan:#22d3ee;          /* 科技青 */
  --blue:#3b82f6;          /* 科技蓝 */
  --violet:#8b5cf6;
  --text:#e6edf6;
  --muted:#8a97ad;
  --line:rgba(120,160,220,.12);
  --glow:0 0 30px rgba(34,211,238,.25);
  --grad:linear-gradient(120deg,#22d3ee,#3b82f6 55%,#8b5cf6);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ============ 3D 背景 ============ */
#bg3d{position:fixed;inset:0;width:100vw;height:100vh;z-index:0;display:block;pointer-events:none}
.grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
/* 内容层浮在 3D 之上 */
nav,header,section,footer{position:relative;z-index:2}

/* ============ 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;
  justify-content:space-between;padding:14px 32px;transition:.35s;
  backdrop-filter:blur(0px);background:transparent}
.nav.scrolled{background:rgba(5,6,10,.72);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);padding:10px 32px}
.brand{display:flex;align-items:center;gap:11px}
.brand-logo{width:34px;height:34px;filter:drop-shadow(0 0 8px rgba(34,211,238,.5))}
.brand-text{font-weight:800;font-size:17px;letter-spacing:1px;display:flex;flex-direction:column;line-height:1.1}
.brand-text small{font-size:9px;letter-spacing:2.5px;color:var(--muted);font-weight:500}
.nav-links{display:flex;gap:30px;list-style:none}
.nav-links a{font-size:14px;color:var(--muted);transition:.25s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;
  background:var(--grad);transition:.3s}
.nav-links a:hover::after{width:100%}
.nav-cta{font-size:13px;font-weight:700;padding:9px 20px;border-radius:40px;color:#04121a;
  background:var(--grad);box-shadow:var(--glow);transition:.25s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 0 24px rgba(34,211,238,.5)}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer}
.nav-burger span{width:22px;height:2px;background:var(--text);border-radius:2px}

/* ============ 首屏 ============ */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;
  position:relative;text-align:center;padding:120px 24px 80px}
.hero-inner{position:relative;z-index:3;max-width:900px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--cyan);
  padding:7px 16px;border:1px solid rgba(34,211,238,.3);border-radius:40px;
  background:rgba(34,211,238,.06);margin-bottom:26px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}
.hero-title{font-size:clamp(34px,6.5vw,72px);font-weight:900;line-height:1.12;letter-spacing:1px}
.hero-sub{margin-top:22px;font-size:clamp(15px,2vw,20px);color:var(--text);font-weight:500;letter-spacing:1px}
.hero-slogan{margin-top:14px;font-size:15px;color:var(--muted);letter-spacing:2px}
.hero-btns{margin-top:38px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:700;
  padding:14px 30px;border-radius:50px;cursor:pointer;transition:.3s;border:1px solid transparent}
.btn svg{width:18px;height:18px;stroke:currentColor;stroke-width:2;fill:none}
.btn-primary{color:#04121a;background:var(--grad);box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(34,211,238,.5)}
.btn-ghost{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(34,211,238,.05)}
.btn-block{width:100%;justify-content:center}
.hero-stats{margin-top:54px;display:flex;gap:40px;justify-content:center;flex-wrap:wrap}
.stat{display:flex;flex-direction:column}
.stat b{font-size:32px;font-weight:800;background:var(--grad);-webkit-background-clip:text;
  background-clip:text;color:transparent}
.stat span{font-size:12px;color:var(--muted);letter-spacing:1px}
.hero-hud{position:absolute;bottom:90px;left:0;right:0;display:flex;gap:12px;
  justify-content:center;flex-wrap:wrap;z-index:3}
.hud-chip{font-size:11px;color:var(--cyan);padding:6px 14px;border-radius:20px;
  border:1px solid rgba(34,211,238,.2);background:rgba(8,11,20,.5);
  backdrop-filter:blur(6px);letter-spacing:1px}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;
  font-size:11px;color:var(--muted);letter-spacing:2px;display:flex;flex-direction:column;
  align-items:center;gap:8px}
.scroll-hint span{width:1px;height:34px;background:linear-gradient(var(--cyan),transparent);
  animation:scroll 1.8s infinite}
@keyframes scroll{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ============ 通用 section ============ */
.section{padding:110px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(11,15,28,.5),rgba(5,6,10,.2));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{text-align:center;margin-bottom:64px}
.sec-tag{font-size:13px;color:var(--cyan);letter-spacing:3px;font-weight:600}
.sec-title{font-size:clamp(28px,4vw,44px);font-weight:800;margin-top:14px;letter-spacing:1px}
.sec-desc{margin-top:14px;color:var(--muted);font-size:15px}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:50px;align-items:center}
.about-text p{font-size:16px;color:var(--muted);margin-bottom:18px}
.about-text p b{color:var(--text)}
.about-diff{font-size:19px!important;color:var(--text)!important;font-weight:600;
  border-left:3px solid var(--cyan);padding-left:18px;margin:24px 0}
.about-diff b{color:var(--cyan)}
.about-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.about-chips span{font-size:13px;padding:7px 15px;border-radius:30px;
  border:1px solid var(--line);background:rgba(255,255,255,.02);color:var(--muted)}
.about-visual{display:flex;flex-direction:column;align-items:center;gap:18px}
.avatar-core{position:relative;width:240px;height:240px;display:flex;align-items:center;justify-content:center}
.avatar-ring{position:absolute;border-radius:50%;border:1px solid rgba(34,211,238,.3)}
.avatar-ring.r1{width:240px;height:240px;animation:spin 18s linear infinite}
.avatar-ring.r2{width:190px;height:190px;border-color:rgba(139,92,246,.3);animation:spin 12s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}
.avatar-face{position:relative;width:120px;height:140px;border-radius:50% 50% 46% 46%;
  background:radial-gradient(circle at 50% 40%,rgba(34,211,238,.18),rgba(8,11,20,.9));
  border:1px solid rgba(34,211,238,.4);box-shadow:var(--glow);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.eye{width:16px;height:22px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 14px var(--cyan);animation:blink 4s infinite}
.eye.e2{animation-delay:.2s}
.eyes-row{display:flex;gap:24px}
@keyframes blink{0%,92%,100%{transform:scaleY(1)}96%{transform:scaleY(.1)}}
.mouth{width:34px;height:8px;border-radius:0 0 20px 20px;background:rgba(34,211,238,.5)}
.avatar-glow{position:absolute;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.15),transparent 70%);
  filter:blur(20px);z-index:-1}
.avatar-cap{font-size:13px;color:var(--muted);letter-spacing:1px}

/* ============ 业务卡片 ============ */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.biz-card{position:relative;padding:34px 28px;border-radius:18px;
  background:linear-gradient(160deg,var(--panel),var(--panel2));
  border:1px solid var(--line);overflow:hidden;transition:.4s;
  transform-style:preserve-3d;will-change:transform}
.biz-card::before{content:"";position:absolute;inset:0;border-radius:18px;
  background:radial-gradient(400px circle at var(--mx,50%) var(--my,50%),rgba(34,211,238,.12),transparent 60%);
  opacity:0;transition:.4s}
.biz-card:hover::before{opacity:1}
.biz-card:hover{border-color:rgba(34,211,238,.4);box-shadow:0 20px 50px rgba(0,0,0,.5),var(--glow)}
.biz-ico{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.2);margin-bottom:22px}
.biz-ico svg{width:28px;height:28px;stroke:var(--cyan);stroke-width:1.5;fill:none;
  filter:drop-shadow(0 0 8px rgba(34,211,238,.5))}
.biz-card h3{font-size:19px;font-weight:700;margin-bottom:12px;letter-spacing:.5px}
.biz-card p{font-size:14px;color:var(--muted);margin-bottom:16px}
.biz-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.biz-list li{font-size:13px;color:var(--muted);padding-left:18px;position:relative}
.biz-list li::before{content:"▸";position:absolute;left:0;color:var(--cyan)}

/* ============ 技术优势 ============ */
.tech-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:900px;margin:0 auto}
.tech-item{display:flex;gap:18px;align-items:flex-start;padding:24px;border-radius:14px;
  background:var(--panel);border:1px solid var(--line);transition:.3s}
.tech-item:hover{border-color:rgba(34,211,238,.35);transform:translateY(-4px)}
.check{flex-shrink:0;width:30px;height:30px;border-radius:8px;display:flex;align-items:center;
  justify-content:center;background:var(--grad);color:#04121a;font-weight:900;font-size:16px}
.tech-item h4{font-size:16px;font-weight:700;margin-bottom:6px}
.tech-item p{font-size:13px;color:var(--muted)}

/* ============ 案例 ============ */
.case-tabs{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.tab{font-size:14px;padding:9px 22px;border-radius:30px;border:1px solid var(--line);
  background:transparent;color:var(--muted);cursor:pointer;transition:.25s}
.tab:hover{color:var(--text);border-color:var(--cyan)}
.tab.active{background:var(--grad);color:#04121a;border-color:transparent;font-weight:700}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:var(--panel);
  transition:.4s;animation:fadeUp .5s both}
.case-card:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.4);box-shadow:var(--glow)}
.case-thumb{height:150px;display:flex;align-items:center;justify-content:center;font-size:40px;
  background:linear-gradient(135deg,rgba(34,211,238,.12),rgba(139,92,246,.12))}
.case-body{padding:22px}
.case-cat{font-size:11px;color:var(--cyan);letter-spacing:1px;text-transform:uppercase}
.case-body h4{font-size:17px;font-weight:700;margin:8px 0}
.case-body p{font-size:13px;color:var(--muted)}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

/* ============ 流程 ============ */
.flow{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;flex-wrap:wrap}
.flow-step{flex:1;min-width:120px;text-align:center;position:relative}
.flow-num{width:52px;height:52px;margin:0 auto 16px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:20px;font-weight:800;color:#04121a;background:var(--grad);
  box-shadow:var(--glow)}
.flow-step h4{font-size:16px;font-weight:700;margin-bottom:6px}
.flow-step p{font-size:13px;color:var(--muted)}
.flow-line{flex:0 0 40px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent);
  margin-top:26px}

/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info{display:flex;flex-direction:column;gap:14px}
.c-row{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;
  border-radius:12px;background:var(--panel);border:1px solid var(--line)}
.c-row span{font-size:13px;color:var(--muted)}
.c-row b{font-size:14px;font-weight:600}
.c-call{margin-top:14px;justify-content:center}
.contact-form{padding:32px;border-radius:18px;background:var(--panel);border:1px solid var(--line)}
.contact-form h3{font-size:20px;font-weight:700;margin-bottom:22px}
.f-row{margin-bottom:16px}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:13px 16px;
  border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.02);
  color:var(--text);font-size:14px;font-family:inherit;transition:.25s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.1)}
.contact-form select{appearance:none;cursor:pointer}
.contact-form option{background:var(--panel2)}
.form-ok{display:none;margin-top:14px;font-size:14px;color:var(--cyan);text-align:center}
.form-ok.show{display:block}

/* ============ 页脚 ============ */
.footer{border-top:1px solid var(--line);padding:56px 0 0;background:rgba(5,6,10,.6)}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:40px}
.footer-brand{max-width:300px}
.footer-brand p{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.8}
.footer-links{display:flex;gap:56px;flex-wrap:wrap}
.footer-links h5{font-size:13px;font-weight:700;margin-bottom:14px;letter-spacing:1px}
.footer-links a{display:block;font-size:13px;color:var(--muted);margin-bottom:10px;transition:.2s}
.footer-links a:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid var(--line);padding:20px 24px;text-align:center;
  font-size:12px;color:var(--muted)}

/* ============ 滚动渐入 ============ */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s,transform .8s}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:900px){
  .nav-links,.nav-cta{display:none}
  .nav-burger{display:flex}
  .nav-links.open{display:flex;position:fixed;top:60px;right:16px;left:16px;flex-direction:column;
    gap:18px;background:rgba(8,11,20,.97);backdrop-filter:blur(16px);padding:24px;border-radius:16px;
    border:1px solid var(--line)}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .biz-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
  .tech-grid{grid-template-columns:1fr}
  .flow-line{display:none}
  .flow{gap:20px}
  .flow-step{flex:0 0 40%}
  .hero-stats{gap:24px}
  .stat b{font-size:24px}
}
@media(max-width:560px){
  .biz-grid,.case-grid{grid-template-columns:1fr}
  .flow-step{flex:0 0 100%}
  .section{padding:70px 0}
  .footer-links{gap:30px}
}