/* ============================================================
   速维精密 RAPI3D — 科技蓝工业风样式
   ============================================================ */
:root{
  --navy:#0b1f33;
  --navy-2:#0f2a45;
  --blue:#1565c0;
  --blue-2:#0a4d8c;
  --blue-light:#2e7fd6;
  --cyan:#19c3d6;
  --cyan-bright:#2ff0e0;
  --gray-50:#f5f8fb;
  --gray-100:#eef3f8;
  --gray-200:#dde6ef;
  --gray-500:#6b7a8d;
  --gray-700:#3c4a5c;
  --text:#16243a;
  --white:#ffffff;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(11,31,51,.10);
  --shadow-lg:0 20px 50px rgba(11,31,51,.16);
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:88px 0}
.section-alt{background:var(--gray-50)}

/* ---------- Buttons ---------- */
.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:1.5px solid transparent;transition:.2s ease;white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{background:linear-gradient(120deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 8px 20px rgba(21,101,192,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,99,235,.30)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--gray-200)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--gray-100);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy)}
.brand-img{height:44px;width:auto;display:block;transition:opacity .2s}
.brand-img.hidden{display:none}
.main-nav{display:flex;gap:26px;font-size:14.5px;font-weight:500;color:var(--gray-700)}
.main-nav a{position:relative;padding:6px 0;transition:color .2s}
.main-nav a:hover{color:var(--blue)}
.main-nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--cyan);transition:width .25s}
.main-nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;background:var(--gray-100);border-radius:999px;padding:3px}
.lang-btn{border:none;background:transparent;cursor:pointer;padding:6px 12px;border-radius:999px;font-size:13px;font-weight:600;color:var(--gray-500);transition:.2s}
.lang-btn.is-active{background:#fff;color:var(--blue);box-shadow:var(--shadow)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:22px;height:2px;background:var(--navy);border-radius:2px;transition:.2s}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 120% at 80% 0%,#0f2a45 0%,#0b1f33 55%);color:#fff}
.hero-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(25,195,214,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(25,195,214,.08) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%);opacity:.7}
.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:84px 22px 40px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--cyan-bright);font-weight:600;margin-bottom:14px;
  padding:6px 14px;border:1px solid rgba(47,240,224,.35);border-radius:999px;background:rgba(47,240,224,.06)}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.15;font-weight:800;letter-spacing:.5px;margin-bottom:18px}
.hero-sub{color:#c7d6e6;font-size:17px;max-width:540px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero-cta .btn-ghost:hover{border-color:var(--cyan);color:var(--cyan-bright)}
.hero-badges{list-style:none;display:flex;gap:22px;flex-wrap:wrap}
.hero-badges li{position:relative;padding-left:18px;font-size:14px;color:#aebfd2}
.hero-visual{display:flex;justify-content:center;align-items:center}
.hero-art{width:100%;max-width:420px}
.spin-slow{animation:spin 26s linear infinite;transform-origin:210px 210px}
@keyframes spin{to{transform:rotate(360deg)}}
.hero-stats{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.08);
  border-radius:var(--radius);overflow:hidden;margin:8px 22px 0;transform:translateY(40px)}
.hero-stats .stat{background:rgba(11,31,51,.55);padding:22px 18px;text-align:center;backdrop-filter:blur(4px)}
.hero-stats .stat strong{display:block;font-size:30px;font-weight:800;color:var(--cyan-bright);font-variant-numeric:tabular-nums}
.hero-stats .stat span{font-size:13px;color:#bcccde}

/* ---------- Section heads ---------- */
.section-head{max-width:720px;margin:0 auto 46px;text-align:center}
.kicker{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--blue);font-weight:700;margin-bottom:12px}
.section-head h2{font-size:clamp(24px,3vw,36px);font-weight:800;color:var(--navy);line-height:1.25}
.section-lead{margin-top:14px;color:var(--gray-500);font-size:16px}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:46px;align-items:start}
.about-text p{margin-bottom:16px;color:var(--gray-700);font-size:16px}
.about-list{list-style:none;margin-top:8px;display:flex;flex-direction:column;gap:12px}
.about-list li{position:relative;padding-left:28px;color:var(--gray-700)}
.about-list li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;
  background:rgba(25,195,214,.15);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.about-cards{display:flex;flex-direction:column;gap:16px}
.mini-card{background:var(--white);border:1px solid var(--gray-200);border-left:4px solid var(--cyan);border-radius:var(--radius-sm);padding:18px 20px;box-shadow:var(--shadow)}
.mini-card h4{color:var(--navy);margin-bottom:6px;font-size:16px}
.mini-card p{color:var(--gray-500);font-size:14.5px}

/* ---------- Service cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.22s ease;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card:hover::before{width:100%}
.card-ico{font-size:30px;margin-bottom:14px;display:inline-flex;width:54px;height:54px;align-items:center;justify-content:center;
  border-radius:12px;background:linear-gradient(135deg,rgba(21,101,192,.1),rgba(25,195,214,.12))}
.card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--gray-500);font-size:14.5px;margin-bottom:14px}
.card-tag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--blue);background:var(--gray-100);padding:5px 12px;border-radius:999px}

/* ---------- Materials ---------- */
.mat-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.mat-col{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.mat-col h4{color:var(--navy);margin-bottom:14px;font-size:16px;display:flex;align-items:center;gap:8px}
.mat-col h4::before{content:"";width:10px;height:10px;border-radius:3px;background:linear-gradient(135deg,var(--blue),var(--cyan))}
.mat-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.mat-col li{padding:10px 12px;background:var(--gray-50);border-radius:8px;font-size:14.5px;color:var(--gray-700)}
.mat-note{margin-top:22px;font-size:13px;color:var(--gray-500);text-align:center}

/* ---------- Timeline ---------- */
.timeline{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:step}
.timeline li{position:relative;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow)}
.timeline li:not(:last-child)::after{content:"";position:absolute;top:42px;right:-18px;width:18px;height:2px;background:var(--gray-200)}
.tl-step{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:12px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-weight:800;font-size:15px;margin-bottom:14px}
.timeline h4{color:var(--navy);font-size:16px;margin-bottom:8px}
.timeline p{color:var(--gray-500);font-size:14px}

/* ---------- Cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.case{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.22s}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-img{height:150px;display:flex;align-items:flex-end;padding:14px;color:#fff;font-weight:700;letter-spacing:1px}
.img-a{background:linear-gradient(135deg,#1565c0,#19c3d6)}
.img-b{background:linear-gradient(135deg,#0a4d8c,#2e7fd6)}
.img-c{background:linear-gradient(135deg,#12476f,#19c3d6)}
.img-d{background:linear-gradient(135deg,#0b1f33,#2e7fd6)}
.case figcaption{padding:16px 18px}
.case figcaption h4{color:var(--navy);font-size:16px;margin-bottom:6px}
.case figcaption p{color:var(--gray-500);font-size:13.5px}
.case-note{margin-top:20px;font-size:13px;color:var(--gray-500);text-align:center}

/* ---------- Quality ---------- */
.quality-inner{display:grid;grid-template-columns:1.3fr .7fr;gap:46px;align-items:center}
.quality-copy h2{font-size:clamp(22px,2.6vw,32px);color:var(--navy);margin:10px 0 16px;font-weight:800}
.quality-copy p{color:var(--gray-700);margin-bottom:18px}
.quality-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.quality-list li{position:relative;padding-left:26px;color:var(--gray-700);font-size:15px}
.quality-list li::before{content:"✓";position:absolute;left:0;top:2px;width:18px;height:18px;border-radius:50%;background:var(--cyan);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.quality-badge{display:flex;flex-direction:column;align-items:center;gap:12px}
.q-ring{width:170px;height:170px;border-radius:50%;border:3px solid var(--cyan);display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:radial-gradient(circle at 50% 40%,rgba(25,195,214,.12),transparent);box-shadow:0 12px 30px rgba(25,195,214,.18)}
.q-ring span{font-size:15px;letter-spacing:3px;color:var(--blue)}
.q-ring strong{font-size:34px;color:var(--navy)}
.quality-badge p{font-size:13px;color:var(--gray-500)}

/* ---------- Contact ---------- */
.contact-inner{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start}
.contact-copy h2{font-size:clamp(24px,3vw,34px);color:var(--navy);margin:10px 0 16px;font-weight:800}
.contact-copy p{color:var(--gray-700);margin-bottom:22px}
.contact-info{list-style:none;display:flex;flex-direction:column;gap:12px}
.contact-info li{display:flex;gap:12px;align-items:center;font-size:15px;color:var(--gray-700)}
.contact-info li span{color:var(--gray-500);min-width:48px;font-size:13px}
.contact-info a{color:var(--blue);font-weight:600}
.contact-form{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);
  display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field-full{grid-column:1 / -1}
.field label{font-size:13.5px;font-weight:600;color:var(--gray-700)}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:14.5px;padding:12px 14px;border:1.5px solid var(--gray-200);border-radius:var(--radius-sm);
  background:var(--gray-50);color:var(--text);transition:.18s;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(21,101,192,.12)}
.field textarea{resize:vertical}
.file-drop{border:1.5px dashed var(--gray-200);border-radius:var(--radius-sm);padding:18px;text-align:center;color:var(--gray-500);font-size:13.5px;cursor:pointer;transition:.18s;background:var(--gray-50)}
.file-drop:hover,.file-drop.is-drag{border-color:var(--cyan);background:rgba(25,195,214,.06);color:var(--blue)}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.form-hint{font-size:12.5px;color:var(--gray-500)}
.form-actions .btn{flex:0 0 auto}
#formHint.success{color:#1a9e6b;font-weight:600}
#formHint.error{color:#d64545;font-weight:600}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#aebfd2;padding:54px 0 22px}
.footer-inner{display:grid;grid-template-columns:1fr 1.6fr;gap:40px}
.footer-brand strong{font-size:20px;color:#fff}
.footer-brand em{display:block;font-style:normal;letter-spacing:3px;font-size:12px;color:var(--cyan);margin-bottom:10px}
.footer-brand p{font-size:13.5px;margin-top:6px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h5{color:#fff;font-size:14px;margin-bottom:14px}
.footer-cols a,.footer-cols span{display:block;font-size:13.5px;color:#9fb1c6;margin-bottom:9px;transition:.2s}
.footer-cols a:hover{color:var(--cyan)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);font-size:12.5px;color:#8194aa}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;padding-top:60px}
  .hero-visual{order:-1;max-width:320px;margin:0 auto}
  .about-grid,.quality-inner,.contact-inner{grid-template-columns:1fr;gap:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .mat-tabs{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr 1fr}
  .timeline li:not(:last-child)::after{display:none}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:680px){
  .section{padding:64px 0}
  .main-nav{position:fixed;inset:68px 0 auto 0;flex-direction:column;background:#fff;padding:18px 22px;gap:6px;
    box-shadow:var(--shadow-lg);transform:translateY(-120%);transition:transform .28s;z-index:40}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:10px 0;border-bottom:1px solid var(--gray-100)}
  .nav-toggle{display:flex}
  .hero-stats{grid-template-columns:1fr 1fr}
  .card-grid,.timeline,.case-grid{grid-template-columns:1fr}
  .contact-form{grid-template-columns:1fr}
  .quality-list{grid-template-columns:1fr}
  .header-actions .btn-primary{display:none}
}