/* Design system */
:root{
  --bg:#0b0d10;
  --bg-alt:#0e1116;
  --card:#12161d;
  --text:#e6e9ef;
  --muted:#a6adbb;
  --brand:#6ea8fe;
  --brand-2:#7c5cff;
  --accent:#22d3ee;
  --line:rgba(255,255,255,0.08);
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,0.35);
}

*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}

/* Custom Scrollbar */
::-webkit-scrollbar{width:8px; height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(110,168,254,0.3); border-radius:4px; border:2px solid transparent; background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:rgba(110,168,254,0.5); background-clip:padding-box}
::-webkit-scrollbar-corner{background:transparent}

/* Firefox Scrollbar */
*{scrollbar-width:thin; scrollbar-color:rgba(110,168,254,0.3) transparent}
body{
  margin:0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color:var(--text); 
  background:
    radial-gradient(ellipse 1200px 800px at 85% -5%, rgba(110,168,254,0.12), transparent 50%),
    radial-gradient(ellipse 1000px 700px at 15% 20%, rgba(124,92,255,0.1), transparent 50%),
    radial-gradient(ellipse 800px 600px at 50% 80%, rgba(110,168,254,0.08), transparent 50%),
    linear-gradient(180deg, rgba(11,13,16,0.95) 0%, var(--bg) 100%),
    var(--bg);
  background-attachment:fixed;
  line-height:1.6; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  padding-top:64px; /* 为固定header留出空间 */
}

img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
a, button{ -webkit-tap-highlight-color: transparent }

/* Anchor offset for fixed header */
section[id]{ scroll-margin-top: 80px }

.container{width:100%; max-width:1160px; padding:0 20px; margin:0 auto}

/* Header */
.site-header{position:fixed; top:0; left:0; right:0; z-index:50; backdrop-filter:saturate(180%) blur(12px); background:rgba(11,13,16,0.6); border-bottom:1px solid var(--line); transition:all 0.3s ease}
.site-header.scrolled{background:rgba(11,13,16,0.9); box-shadow:0 2px 20px rgba(0,0,0,0.3)}
.header-inner{display:flex; align-items:center; justify-content:space-between; height:64px}
.logo{display:inline-flex; align-items:center; gap:10px; font-weight:700}
.logo-image{width:28px; height:28px; border-radius:6px; object-fit:cover}
.logo-text{letter-spacing:0.5px}

.nav-toggle{display:none; background:transparent; border:0; color:var(--text); font-size:22px}
.nav-list{list-style:none; display:flex; gap:18px; margin:0; padding:0; align-items:center}
.nav-list a{opacity:0.9; padding:8px 10px; transition:all 0.3s ease; position:relative}
.nav-list a:hover{opacity:1}
.nav-list a.active{opacity:1; color:var(--brand)}
.nav-list a.active::after{content:''; position:absolute; bottom:4px; left:10px; right:10px; height:2px; background:var(--brand); border-radius:2px}
.nav-list a.btn-primary{opacity:1; padding:8px 16px; font-size:14px}
.nav-list a.btn-primary.active{background:linear-gradient(135deg, var(--brand), var(--brand-2)); color:#0b0d10; box-shadow:0 4px 12px rgba(110,168,254,0.4); opacity:1}
.nav-list a.btn-primary.active::after{display:none}

.btn{display:inline-flex; align-items:center; gap:8px; padding:12px 18px; border-radius:999px; border:1px solid var(--line); background:linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); color:var(--text); transition:all 0.3s ease}
.btn:hover{transform:translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,0.3)}
.btn-sm{padding:8px 12px}
.btn-primary{border:0; background:linear-gradient(135deg, var(--brand), var(--brand-2)); color:#0b0d10}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 4px 12px rgba(110,168,254,0.4)}
.btn-ghost{background:rgba(255,255,255,0.08); border-color:var(--line)}
.btn-ghost:hover{background:rgba(255,255,255,0.15); transform:translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,0.3)}

/* Sections */
.section{padding:96px 0}
.section-head{max-width:720px; margin:0 auto 48px; text-align:center}
.section-head h2{margin:0 0 12px; font-size:36px; font-weight:700}
.section-head p{margin:0; color:var(--muted); font-size:17px}

.hero{
  padding:120px 0 80px;
  position:relative;
  min-height:70vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  background-attachment:fixed;
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  -webkit-backface-visibility:hidden;
  backface-visibility:hidden;
  transform:translateZ(0);
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(11,13,16,0.25) 0%, rgba(11,13,16,0.4) 40%, rgba(11,13,16,0.6) 100%);
  z-index:0;
  pointer-events:none;
}
.hero-inner{
  width:100%;
  max-width:860px;
  margin:0 auto;
  text-align:center;
  position:relative;
  z-index:1;
}
.hero-services{margin:0 0 40px}
.eyebrow{display:inline-flex; align-items:center; gap:10px; color:var(--text); font-size:18px; font-weight:600; letter-spacing:0.8px; margin:0 0 20px; text-shadow:0 1px 4px rgba(0,0,0,0.4)}
.eyebrow i{font-size:22px; color:var(--brand); filter:drop-shadow(0 0 10px rgba(110,168,254,0.6))}
.hero h1{margin:0 0 20px; font-size:50px; line-height:1.25; font-weight:700; color:#ffffff; text-shadow:2px 2px 8px rgba(0,0,0,0.8); letter-spacing:-0.3px}
.hero .slogan{color:var(--brand); font-size:19px; font-weight:500; margin:0 0 28px; text-shadow:0 0 15px rgba(110,168,254,0.4); letter-spacing:2px; display:block}
.hero .lead{color:rgba(255,255,255,0.95); font-size:18px; line-height:1.8; max-width:680px; margin:0 auto; text-shadow:1px 1px 4px rgba(0,0,0,0.5); font-weight:400}
.hero .lead strong{color:#ffffff; font-weight:600; text-shadow:0 0 8px rgba(110,168,254,0.4)}
.hero .cta-group{display:flex; gap:16px; margin:0 auto 44px; justify-content:center; flex-wrap:wrap}
.hero-divider{width:100px; height:1px; margin:0 auto 40px; background:linear-gradient(90deg, transparent, rgba(110,168,254,0.3), transparent)}
.hero .badges{display:flex; flex-wrap:wrap; gap:12px; margin:0 auto; justify-content:center; max-width:680px}
.badge{display:inline-flex; align-items:center; gap:6px; padding:6px 10px; border-radius:999px; background:rgba(255,255,255,0.06); border:1px solid var(--line); color:#ffffff; transition:all 0.3s ease}
.badge:hover{background:rgba(255,255,255,0.1); color:var(--brand); transform:translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,0.3)}

.glass-card{border-radius:var(--radius); background:linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03)); border:1px solid var(--line); box-shadow:var(--shadow); padding:18px}
.glass-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.glass-item{display:flex; align-items:center; gap:10px; padding:14px; border-radius:12px; background:rgba(255,255,255,0.04); border:1px dashed var(--line)}
.glass-item i{color:var(--brand)}

.grid{display:grid; gap:18px}  
.grid-4{grid-template-columns:repeat(4, 1fr)}
.grid-3{grid-template-columns:repeat(3, 1fr)}

.card{border-radius:var(--radius); background:var(--card); border:1px solid var(--line); padding:18px}
.card-icon{width:40px; height:40px; display:grid; place-items:center; border-radius:10px; background:linear-gradient(135deg, rgba(110,168,254,0.15), rgba(124,92,255,0.15)); color:var(--brand)}
.card h3{margin:12px 0}
.card p{margin:0 0 12px; color:var(--muted)}
.list{margin:0; padding-left:18px; color:var(--muted)}
.list.two-col{columns:2}

.alt-bg{background:rgba(14,17,22,0.4)}
 
.product-card{border-radius:var(--radius); background:var(--card); border:1px solid var(--line); overflow:hidden}
.product-card h3{margin:14px 14px 6px}
.product-card p{margin:0 14px 10px; color:var(--muted)}
.product-card .tags{display:flex; gap:8px; padding:0 14px 16px}
.product-card .tags span{padding:4px 8px; border-radius:999px; background:rgba(255,255,255,0.06); color:var(--muted); border:1px solid var(--line)}
.media-ratio{position:relative; overflow:hidden}
.media-ratio::before{content:""; display:block; padding-top:62%}
.media-ratio img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover}

.cases-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:20px}
.case-item{border:1px solid var(--line); background:var(--card); border-radius:14px; overflow:hidden; transition:transform 0.3s ease, box-shadow 0.3s ease}
.case-item:hover{transform:translateY(-4px); box-shadow:0 8px 25px rgba(0,0,0,0.3)}
.case-video{position:relative; width:100%; height:200px; overflow:hidden; cursor:pointer}
.case-video video{width:100%; height:100%; object-fit:cover; background:var(--bg-alt); cursor:pointer}
.case-video .play-button{position:absolute; top:50%; left:50%; transform:translate(-50%, -50%); font-size:48px; color:rgba(255,255,255,0.9); cursor:pointer; transition:all 0.3s ease; z-index:2; pointer-events:auto}
.case-video .play-button:hover{color:var(--brand); transform:translate(-50%, -50%) scale(1.1)}
.case-video::before{content:''; position:absolute; inset:0; background:linear-gradient(45deg, rgba(0,0,0,0.1), rgba(0,0,0,0.3)); z-index:1; pointer-events:none}
.case-content{padding:16px}
.case-content h3{margin:0 0 8px; color:var(--text)}
.case-content p{margin:0 0 12px; color:var(--muted); font-size:14px; line-height:1.5}
.chip{display:inline-block; padding:4px 8px; border-radius:999px; background:rgba(255,255,255,0.06); color:var(--muted); border:1px solid var(--line); font-size:12px}

.about-intro{max-width:800px; margin:0 auto 48px; text-align:center}
.about-intro p{margin:0; color:var(--muted); font-size:16px; line-height:1.8}
.about-intro p strong{color:var(--text); font-weight:600}
.about-grid{display:grid; grid-template-columns:1.2fr 0.8fr; gap:40px; align-items:start}
.about-text{color:var(--text)}
.mission-vision{display:flex; flex-direction:column; gap:16px}
.mission-item, .vision-item, .values-item{padding:20px; border-radius:14px; background:rgba(255,255,255,0.03); border:1px solid var(--line); transition:all 0.3s ease}
.mission-item:hover, .vision-item:hover, .values-item:hover{background:rgba(255,255,255,0.05); border-color:rgba(110,168,254,0.3); transform:translateY(-2px)}
.mission-item h3, .vision-item h3, .values-item h3{display:flex; align-items:center; gap:10px; margin:0 0 12px; font-size:18px; color:var(--brand); font-weight:600}
.mission-item h3 i, .vision-item h3 i, .values-item h3 i{font-size:22px}
.mission-item p, .vision-item p{margin:0; color:var(--muted); line-height:1.7; font-size:15px}
.values-tags{display:flex; flex-wrap:wrap; gap:8px; margin-top:4px}
.value-tag{display:inline-block; padding:6px 14px; border-radius:999px; background:linear-gradient(135deg, rgba(110,168,254,0.15), rgba(124,92,255,0.15)); border:1px solid rgba(110,168,254,0.2); color:var(--brand); font-size:13px; font-weight:500; transition:all 0.3s ease}
.value-tag:hover{background:linear-gradient(135deg, rgba(110,168,254,0.25), rgba(124,92,255,0.25)); transform:translateY(-1px)}
.about-stats{display:flex; flex-direction:column; gap:16px}
.stat{display:flex; flex-direction:column; align-items:center; justify-content:center; border:1px solid var(--line); background:var(--card); border-radius:14px; padding:24px; transition:all 0.3s ease}
.stat:hover{border-color:rgba(110,168,254,0.3); transform:translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,0.2)}
.stat .num{font-size:28px; font-weight:700; background:linear-gradient(135deg, var(--brand), var(--brand-2)); -webkit-background-clip:text; background-clip:text; color:transparent; margin-bottom:8px}
.stat span:last-child{color:var(--muted); font-size:14px; font-weight:400}

.contact-info{border:1px solid var(--line); background:var(--card); border-radius:var(--radius); padding:24px; max-width:1000px; margin:0 auto}
.contact-methods-section{margin-bottom:32px}
.contact-methods-section h3{margin:0 0 20px; color:var(--text); text-align:center}
.contact-methods{display:grid; grid-template-columns:repeat(2, 1fr); gap:16px; margin-bottom:24px}
.qr-codes-grid{display:grid; grid-template-columns:repeat(4, 1fr); gap:20px; margin-bottom:24px}
.qr-code-section h3{margin:0 0 12px; color:var(--text); text-align:center; font-size:15px}
.contact-item{display:flex; align-items:center; gap:12px; margin-bottom:16px; padding:12px; border-radius:10px; background:rgba(255,255,255,0.04); border:1px solid var(--line)}
.contact-item i{font-size:20px; color:var(--brand)}
.contact-item strong{display:block; margin-bottom:4px; color:var(--text)}
.contact-item p{margin:0; color:var(--muted)}
.qr-code-section{text-align:center}
.qr-code{width:120px; height:120px; margin:0 auto 12px; border-radius:12px; overflow:hidden; border:1px solid var(--line); background:rgba(255,255,255,0.05)}
.qr-code img{width:100%; height:100%; object-fit:cover; display:block}
.qr-code-section p{margin:0; color:var(--muted); font-size:13px; line-height:1.5}
.contact-tips{border-top:1px solid var(--line); padding-top:20px}
.contact-tips h4{margin:0 0 12px; color:var(--text)}
.contact-tips ul{margin:0; padding-left:18px; color:var(--muted)}
.contact-tips li{margin-bottom:8px}

.site-footer{border-top:1px solid var(--line); margin-top:80px; padding-top:72px; padding-bottom:0}
.footer-inner{display:flex; align-items:center; justify-content:space-between; gap:40px; padding-bottom:56px; flex-wrap:wrap}
.footer-left{flex:1; min-width:300px}
.footer-left .logo{margin-bottom:20px}
.footer-left p{margin:0; color:var(--muted); font-size:15px; line-height:1.7; opacity:0.9; font-weight:400; max-width:400px}
.footer-right{flex-shrink:0}
.footer-links{list-style:none; display:flex; flex-direction:row; gap:32px; margin:0; padding:0; flex-wrap:wrap; align-items:center}
.footer-links a{color:var(--muted); font-size:15px; transition:color 0.3s ease; display:block; font-weight:400; white-space:nowrap}
.footer-links a:hover{color:var(--brand)}
.icp{border-top:1px solid var(--line); text-align:center; color:var(--muted); font-size:14px; padding:36px 0 48px; margin-top:0}
.icp p{margin:8px 0; line-height:1.7}
.icp a{color:var(--muted); transition:color 0.3s ease; font-size:14px}
.icp a:hover{color:var(--text)}
.icp .record a{display:inline-flex; align-items:center; gap:6px; color:var(--muted); transition:color 0.3s ease}
.icp .record a:hover{color:var(--text)}
.icp .record img{width:16px; height:16px; vertical-align:middle}

/* Reveal animation */
.reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease}
.reveal.visible{opacity:1; transform:none}

/* Back to top button */
.back-to-top{position:fixed; right:20px; bottom:24px; width:44px; height:44px; border-radius:999px; border:1px solid var(--line); background:rgba(18,22,29,0.7); backdrop-filter:blur(6px); color:var(--text); display:grid; place-items:center; box-shadow:0 8px 24px rgba(0,0,0,0.35); cursor:pointer; opacity:0; visibility:hidden; transform:translateY(8px); transition:opacity .25s ease, transform .25s ease, visibility .25s ease}
.back-to-top:hover{transform:translateY(4px); color:var(--brand)}
.back-to-top.show{opacity:1; visibility:visible; transform:translateY(0)}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto }
  .reveal{ transition: none }
}

/* Responsive */
@media (max-width: 1024px){
  .hero{min-height:60vh; padding:100px 0 60px}
  .hero h1{font-size:40px}
  .hero .lead{font-size:16px}
  .about-intro{margin-bottom:40px}
  .about-grid{grid-template-columns:1fr; gap:32px}
  .about-stats{flex-direction:row; flex-wrap:wrap; gap:12px}
  .stat{flex:1; min-width:140px}
  .footer-inner{grid-template-columns:1fr; gap:48px}
  .footer-links-group{grid-template-columns:repeat(3, 1fr); gap:32px; max-width:100%}
}
@media (max-width: 1024px){
  .contact-methods{grid-template-columns:1fr; gap:12px}
  .qr-codes-grid{grid-template-columns:1fr 1fr; gap:20px}
}
@media (max-width: 860px){
  .grid-4{grid-template-columns:1fr 1fr}
  .grid-3{grid-template-columns:1fr 1fr}
  .about-stats{grid-template-columns:1fr 1fr 1fr}
  .cases-grid{grid-template-columns:1fr 1fr}
  .footer-links-group{grid-template-columns:repeat(2, 1fr); gap:32px}
}
@media (max-width: 640px){
  body{padding-top:56px} /* 移动端header高度 */
  .section{padding:72px 0}
  .section-head{margin-bottom:36px}
  .section-head h2{font-size:28px}
  .section-head p{font-size:15px}
  .header-inner{height:56px}
  .nav-toggle{display:inline-flex}
  .nav-list{position:fixed; inset:56px 12px auto 12px; flex-direction:column; gap:12px; padding:12px; background:var(--card); border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow); display:none}
  .nav-list.open{display:flex}
  section[id]{ scroll-margin-top: 70px } /* 移动端锚点偏移 */
  .hero{min-height:50vh; padding:80px 0 40px}
  .hero-services{margin-bottom:32px}
  .hero .eyebrow{font-size:15px; margin-bottom:16px; gap:8px; letter-spacing:0.5px}
  .hero .eyebrow i{font-size:18px}
  .hero h1{font-size:30px; line-height:1.25; letter-spacing:-0.3px; margin-bottom:12px}
  .hero .slogan{font-size:16px; letter-spacing:1.5px; margin-bottom:20px}
  .hero .lead{font-size:15px; max-width:90%; margin:0 auto; line-height:1.75}
  .hero .cta-group{margin-bottom:32px; gap:12px}
  .hero-divider{width:80px; margin-bottom:32px}
  .hero .badges{gap:10px}
  .hero .badges{gap:8px}
  .hero .badges .badge{font-size:13px; padding:5px 8px}
  .grid-4, .grid-3{grid-template-columns:1fr}
  .qr-codes-grid{grid-template-columns:1fr; gap:20px}
  .cases-grid{grid-template-columns:1fr}
  .about-intro{margin-bottom:32px}
  .about-intro p{font-size:14px; line-height:1.7}
  .about-grid{grid-template-columns:1fr; gap:28px}
  .mission-item, .vision-item, .values-item{padding:18px}
  .about-stats{flex-direction:column; gap:12px}
  .stat{padding:20px}
  .stat .num{font-size:24px}
  .site-footer{margin-top:64px; padding-top:56px}
  .footer-inner{flex-direction:column; align-items:flex-start; gap:32px; padding-bottom:40px}
  .footer-left{min-width:100%; max-width:100%}
  .footer-left .logo{margin-bottom:20px}
  .footer-left p{font-size:14px; line-height:1.7; max-width:100%}
  .footer-right{width:100%}
  .footer-links{flex-direction:row; gap:24px; justify-content:flex-start; flex-wrap:wrap}
  .footer-links a{font-size:14px}
  .cta-group .btn{flex:1 1 100%; justify-content:center}
  .icp{padding:32px 0 40px; font-size:13px}
  .back-to-top{right:14px; bottom:18px; width:40px; height:40px}
}