/* ===== Shenzhen Hanyu · highuse.com ===== */
:root{
  --bg:#0a0e17;
  --bg-alt:#0f1524;
  --surface:#131a2b;
  --surface-2:#1a2338;
  --ink:#e8edf6;
  --muted:#93a0b8;
  --border:rgba(255,255,255,.08);
  --accent:#2f7bff;
  --accent-2:#5aa7ff;
  --accent-ink:#0a0e17;
  --radius:14px;
  --shadow:0 18px 50px rgba(0,0,0,.35);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.container{width:min(1120px,92%);margin:0 auto}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ===== NAVBAR ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s,box-shadow .3s;background:rgba(10,14,23,.6);backdrop-filter:blur(14px);border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(10,14,23,.92);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:var(--accent-ink);font-weight:800;display:grid;place-items:center;font-size:16px;letter-spacing:.5px}
.brand-logo{width:44px;height:44px;object-fit:contain;display:block}
.brand-logo-full{height:104px;width:auto;object-fit:contain;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:700}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:flex;gap:6px}
.nav-links a{padding:9px 14px;border-radius:8px;font-size:14.5px;font-weight:500;color:var(--muted);transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ink);background:var(--surface-2)}
.nav-links a.active{color:var(--ink);background:var(--surface-2);color:var(--accent-2)}
.nav-actions{display:flex;align-items:center;gap:10px}
.lang-toggle{background:var(--surface-2);border:1px solid var(--border);color:var(--ink);padding:7px 14px;border-radius:8px;font-weight:600;font-size:13px;cursor:pointer;transition:background .2s}
.lang-toggle:hover{background:var(--accent);color:var(--accent-ink)}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}
@media(max-width:820px){
  .nav-links{position:fixed;top:72px;right:0;bottom:0;width:min(300px,80%);background:var(--bg-alt);flex-direction:column;padding:24px;gap:4px;transform:translateX(100%);transition:transform .3s;border-left:1px solid var(--border)}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{padding:14px;font-size:16px}
  .nav-burger{display:flex}
}

/* ===== HERO ===== */
.hero{position:relative;padding:170px 0 100px;overflow:hidden;background:var(--bg)}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(60% 50% at 70% 20%,rgba(47,123,255,.22),transparent 60%),
  radial-gradient(50% 40% at 15% 70%,rgba(90,167,255,.12),transparent 60%),
  linear-gradient(180deg,var(--bg),var(--bg-alt));z-index:0}
.hero-bg::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(60% 60% at 60% 40%,#000,transparent)}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--accent-2);border:1px solid var(--border);padding:7px 16px;border-radius:999px;background:rgba(47,123,255,.08);margin-bottom:26px}
.hero-title{font-size:clamp(40px,7vw,72px);font-weight:800;line-height:1.08;letter-spacing:-1px}
.hero-accent{background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;display:block}
.hero-sub{max-width:620px;margin:26px auto 0;color:var(--muted);font-size:17px}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 28px;border-radius:10px;font-weight:600;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:var(--accent-ink);box-shadow:0 10px 30px rgba(47,123,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(47,123,255,.45)}
.btn-ghost{border:1px solid var(--border);color:var(--ink);background:rgba(255,255,255,.02)}
.btn-ghost:hover{background:var(--surface-2);transform:translateY(-2px)}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:64px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;align-items:center}
.stat strong{font-size:30px;font-weight:800;color:var(--ink)}
.stat span{font-size:13px;color:var(--muted);margin-top:2px}

/* ===== SECTIONS ===== */
.section{padding:100px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:680px;margin:0 auto 56px;text-align:center}
.section-kicker{font-size:13px;letter-spacing:2px;color:var(--accent-2);text-transform:uppercase;margin-bottom:14px}
.section-title{font-size:clamp(28px,4vw,40px);font-weight:800;line-height:1.2;letter-spacing:-.5px}
.section-desc{color:var(--muted);font-size:16px;margin-top:16px}

.grid{display:grid;gap:20px}
.about-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.about-card,.product-card{padding:30px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);transition:transform .25s,border-color .25s}
.about-card:hover,.product-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.4)}
.about-card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--ink)}
.about-card p,.product-card p{color:var(--muted);font-size:14.5px}

.products-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.product-icon{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;font-size:15px;font-weight:800;letter-spacing:.5px;background:linear-gradient(135deg,rgba(47,123,255,.25),rgba(90,167,255,.15));color:var(--accent-2);border:1px solid rgba(47,123,255,.3);margin-bottom:20px}
.product-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.product-link{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:var(--accent-2);text-decoration:none;transition:color .2s}
.product-link:hover{color:#fff}

.apps-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.app-card{padding:26px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);transition:transform .25s,border-color .25s}
.app-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.4)}
.app-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.app-card p{color:var(--muted);font-size:14px}

.partner-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.partner-logo{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:34px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);text-align:center;transition:transform .25s,border-color .25s}
.partner-logo:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.4)}
.partner-logo strong{font-size:22px;font-weight:800;letter-spacing:1px}
.partner-logo span{font-size:13px;color:var(--muted);margin-top:6px}

.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.contact-item{padding:28px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border)}
.contact-item span{font-size:13px;letter-spacing:1px;color:var(--accent-2);text-transform:uppercase}
.contact-item p{font-size:16px;font-weight:600;margin-top:10px;color:var(--ink)}

/* ===== FOOTER ===== */
.footer{border-top:1px solid var(--border);padding:40px 0;background:var(--bg-alt)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand strong{font-size:16px}
.footer-brand p{font-size:12px;color:var(--muted)}
.footer-copy{color:var(--muted);font-size:13px}

@media(max-width:600px){
  .section{padding:70px 0}
  .hero{padding:140px 0 70px}
  .hero-stats{gap:24px}
}