/* --- Mobile-first refined styles for FOMA (EN/简/繁) --- */

/* Color tokens */
:root{
  --bg:#0a0a0b;
  --card:#0f1114;
  --fg:#f5f7fb;
  --muted:#cbd5e1;
  --border:#25262b;
  --brand:#16a34a;
  --accent:#60a5fa;
}

/* Base */
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,Helvetica,"PingFang SC","Microsoft YaHei","Noto Sans TC",sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}

/* Fluid type */
h1{font-size:clamp(28px,6vw,54px);line-height:1.15;margin:16px 0 10px}
h2{font-size:clamp(22px,4.2vw,34px);margin:10px 0 12px}
h3{font-size:clamp(18px,3.2vw,22px);margin:8px 0 8px}
.lead{font-size:clamp(14px,2.6vw,18px);color:#d1d5db;max-width:880px}

/* Links / Buttons */
a{color:var(--fg);text-decoration:none}
a:hover{opacity:.92}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;border-radius:12px;border:1px solid #2a2a2f;background:#f5f7fb;color:#0b0b0b;
  font-weight:600;min-height:44px}
.btn.secondary{background:transparent;color:#f5f7fb;border-color:#3a3a40}
.btn.block{width:100%}

/* Layout */
.container{max-width:1200px;margin:0 auto;padding:20px}
.section{padding:56px 20px}
.grid{display:grid;gap:16px}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}

/* Header / Nav */
.header{position:sticky;top:0;background:rgba(10,10,11,.86);
  backdrop-filter:blur(7px);z-index:20;border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.nav .spacer{flex:1 1 auto}
.nav a{padding:10px;border-radius:10px;color:#e5e7eb;white-space:nowrap}
.nav a.active{background:rgba(255,255,255,.09)}
.flags{display:flex;gap:8px;flex-wrap:nowrap}
.flag{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);
  padding:6px 10px;border-radius:12px;background:#111214;cursor:pointer;white-space:nowrap}
.flag img{width:18px;height:12px;border-radius:2px;border:1px solid #000}

/* Hero */
.hero{position:relative;min-height:68vh;display:grid;align-items:center}
.hero .bg{position:absolute;inset:0;background:url('https://images.unsplash.com/photo-1509395176047-4a66953fd231?q=80&w=2400&auto=format&fit=crop') center/cover no-repeat;
  filter:brightness(.58)}
.hero .content{position:relative;z-index:2;padding:80px 0 32px}
.badge{display:inline-flex;gap:8px;align-items:center;border:1px solid var(--border);background:rgba(255,255,255,.06);
  padding:6px 12px;border-radius:999px;color:#e5e7eb}

/* Cards / KPIs */
.card{background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid var(--border);border-radius:18px;padding:18px}
.kpis{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
.kpi{background:rgba(0,0,0,.35);border:1px solid var(--border);border-radius:16px;padding:14px 16px;min-width:150px}
.kpi strong{display:block;font-size:clamp(18px,4.6vw,26px)}

/* Footer */
.footer{border-top:1px solid var(--border);padding:28px 0;margin-top:40px;color:#cbd5e1}
.notice{background:#0f1114;border:1px dashed var(--border);padding:12px;border-radius:12px;color:#d1d5db}
.small{color:#a1a1aa;font-size:13px}

/* Reveal */
.reveal{opacity:0;transform:translateY(10px);transition:.6s ease}
.reveal.in{opacity:1;transform:none}

/* --- Responsive adjustments --- */

/* <= 1024px */
@media (max-width: 1024px){
  .container{padding:18px}
  .section{padding:48px 18px}
  .grid.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero{min-height:62vh}
}

/* <= 768px (tablets/phones) */
@media (max-width: 768px){
  .container{padding:16px}
  .section{padding:42px 16px}
  .nav{gap:8px}
  .flags{gap:6px}
  .hero .content{padding:64px 0 28px}
  .kpi{min-width:45%}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .btn-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
}

/* <= 480px (small phones) */
@media (max-width: 480px){
  .container{padding:14px}
  .section{padding:36px 14px}
  .hero{min-height:56vh}
  .kpi{min-width:100%}
  .btn-row,.btn-stack{display:grid;grid-template-columns:1fr;gap:10px}
  .btn{width:100%}
}