/* ===== 离耀光子 跨境宣传站 · 静态版（Cloudflare Pages 免费） ===== */
:root{
  --ink:#0f172a; --sub:#475569; --line:#e2e8f0; --bg:#ffffff;
  --soft:#f8fafc; --brand:#0ea5e9; --brand2:#0369a1; --cta:#f97316;
  --red:#dc2626; --redbg:#fef2f2; --ok:#16a34a; --okbg:#f0fdf4;
  --warn:#b45309; --warnbg:#fffbeb;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:var(--brand2);text-decoration:none}
img{max-width:100%}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
/* header */
header.top{background:#0b1220;color:#fff;padding:13px 0;position:sticky;top:0;z-index:50;box-shadow:0 2px 14px rgba(0,0,0,.25)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:800;font-size:19px;letter-spacing:.5px}
.logo small{font-weight:400;opacity:.65;font-size:11px;margin-left:8px}
nav.menu a{color:#cbd5e1;margin-left:18px;font-size:14px;font-weight:600}
nav.menu a:hover{color:#fff}
.menu-btn{display:none;background:none;border:1px solid #334155;color:#fff;border-radius:8px;padding:6px 10px;font-size:13px;cursor:pointer}
/* hero */
.hero{background:linear-gradient(120deg,#0c4a6e,#0369a1 55%,#0ea5e9);color:#fff;padding:66px 0 58px}
.hero .tag{display:inline-block;background:var(--cta);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:99px;margin-bottom:16px}
.hero h1{font-size:40px;line-height:1.18;margin-bottom:14px;max-width:820px}
.hero p{color:#dbeafe;max-width:680px;font-size:16px}
.hero .cta{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;font-weight:800;padding:12px 24px;border-radius:10px;font-size:15px}
.btn-cta{background:var(--cta);color:#fff}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.4)}
/* sections */
section{padding:48px 0;background:#fff;border-bottom:1px solid var(--line)}
section.alt{background:var(--soft)}
h2.sec{font-size:28px;margin-bottom:8px;text-align:center}
p.lead{color:var(--sub);text-align:center;max-width:760px;margin:0 auto 26px;font-size:15px}
/* trust bar */
.trust{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.trust span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);color:#e0f2fe;font-size:13px;font-weight:600;padding:7px 14px;border-radius:99px}
/* grid */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.card h3{font-size:18px;margin-bottom:6px;color:var(--brand2)}
.card .price{color:var(--cta);font-weight:800;font-size:15px;margin:8px 0}
.card ul{margin:10px 0 0 18px;font-size:14px;color:var(--sub)}
.card .quote-btn{display:inline-block;margin-top:14px;background:var(--brand);color:#fff;font-weight:700;padding:9px 18px;border-radius:9px;font-size:14px}
/* solutions 2x2 */
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:880px;margin:0 auto}
.sol{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:10px;padding:18px 20px}
.sol h3{font-size:16px;color:var(--brand2);margin-bottom:5px}
.sol p{font-size:13.5px;color:var(--sub)}
/* about */
.about{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}
.about .txt p{font-size:14.5px;color:var(--sub);margin-bottom:10px}
.about .box{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:18px}
.about .box b{color:var(--brand2)}
/* contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.chan{display:flex;flex-direction:column;gap:12px}
.ch{border:1px solid var(--line);border-radius:11px;padding:15px 18px;display:flex;align-items:center;gap:14px;background:#fff}
.ch .ic{font-size:22px}
.ch b{display:block;font-size:15px;color:var(--ink)}
.ch span{font-size:13px;color:var(--sub)}
.ch a{color:var(--brand2);font-weight:700}
form.lead-form{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:20px}
form.lead-form label{display:block;font-size:13px;font-weight:700;margin:10px 0 5px;color:var(--ink)}
form.lead-form input,form.lead-form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit}
form.lead-form button{margin-top:14px;width:100%;background:var(--cta);color:#fff;font-weight:800;border:none;padding:12px;border-radius:9px;font-size:15px;cursor:pointer}
.note{background:var(--warnbg);border:1px solid #fde68a;border-radius:10px;padding:14px 16px;font-size:13.5px;margin:18px 0;color:#78350f}
.note.red{background:var(--redbg);border-color:#fecaca;color:#7f1d1d}
.note b{font-weight:800}
footer{background:#0b1220;color:#94a3b8;padding:34px 0;font-size:13px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}
/* responsive */
@media(max-width:860px){
  nav.menu{display:none}
  .menu-btn{display:block}
  nav.menu.open{display:flex;position:absolute;top:54px;left:0;right:0;background:#0b1220;flex-direction:column;padding:14px 20px;gap:6px;border-top:1px solid #1e293b}
  .hero h1{font-size:28px}
  .grid3,.grid2,.about,.contact{grid-template-columns:1fr}
}