:root{
  --navy:#102a43; --navy2:#0b1f33; --teal:#0e9f8a; --teal-d:#0b7f6f;
  --bg:#f6f9fb; --card:#ffffff; --ink:#1f2d3d; --muted:#5d6f82;
  --line:#e3ebf1; --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:17px}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}
a{color:var(--teal-d);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--navy);letter-spacing:.2px}
.brand:hover{text-decoration:none}
.brand-mark{width:30px;height:30px;border-radius:8px;background:var(--navy);display:inline-flex;align-items:center;justify-content:center}
.main-nav{display:flex;gap:22px;margin-left:auto}
.main-nav a{color:var(--muted);font-size:15px;font-weight:500}
.main-nav a:hover{color:var(--navy);text-decoration:none}
.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:14px}
.lang-switch a{padding:6px 13px;color:var(--muted);font-weight:600}
.lang-switch a:hover{text-decoration:none;background:#eef4f7}
.lang-switch a.active{background:var(--navy);color:#fff}

/* hero */
.hero{background:linear-gradient(160deg,var(--navy2),var(--navy) 60%,#16405f);color:#fff;padding:84px 0 70px;position:relative;overflow:hidden}
.hero .eyebrow{display:inline-block;font-size:14px;font-weight:700;letter-spacing:2px;color:#7fe3d2;border:1px solid rgba(127,227,210,.4);border-radius:999px;padding:6px 16px;margin-bottom:22px}
.hero h1{font-size:44px;line-height:1.35;font-weight:800;max-width:640px}
.hero p.lead{margin-top:18px;font-size:19px;color:#c9d8e3;max-width:620px}
.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-weight:700;font-size:16px;border:2px solid transparent}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{border-color:#fff}
.pulse{position:absolute;right:-40px;bottom:24px;opacity:.5;width:min(520px,60vw)}

/* sections */
.section{padding:72px 0}
.section h2{font-size:30px;font-weight:800;color:var(--navy);text-align:center}
.section .sub{text-align:center;color:var(--muted);margin-top:10px;max-width:640px;margin-left:auto;margin-right:auto}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;box-shadow:0 6px 24px rgba(16,42,67,.06)}
.card .tag{display:inline-block;font-size:13px;font-weight:700;color:var(--teal-d);background:#e6f6f2;border-radius:6px;padding:4px 12px;margin-bottom:14px;letter-spacing:1px}
.card h3{font-size:22px;color:var(--navy);margin-bottom:8px}
.card p.desc{color:var(--muted);font-size:15.5px;margin-bottom:18px}
.check-list{list-style:none}
.check-list li{padding:9px 0 9px 32px;position:relative;border-top:1px dashed var(--line);font-size:15.5px}
.check-list li::before{content:"✓";position:absolute;left:4px;color:var(--teal);font-weight:800}

/* process */
.process{background:var(--navy);color:#fff}
.process h2{color:#fff}
.process .sub{color:#a9bccd}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:28px 24px}
.step .num{font-size:34px;font-weight:800;color:var(--teal)}
.step h4{margin:8px 0 6px;font-size:18px}
.step p{color:#b9c9d8;font-size:15px}

/* contact */
.contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:40px}
.mail-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;display:block;color:var(--ink)}
.mail-card:hover{text-decoration:none;border-color:var(--teal);box-shadow:0 6px 24px rgba(16,42,67,.08)}
.mail-card .label{font-size:14px;color:var(--muted);font-weight:600}
.mail-card .addr{font-size:20px;font-weight:800;color:var(--navy);margin-top:6px;word-break:break-all}
.placeholders{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:26px}
.placeholder{background:#eef2f5;border:1px dashed #b9c7d3;border-radius:var(--radius);padding:24px 30px;color:var(--muted)}
.placeholder .ph-title{font-weight:700;color:#7b8ea1}
.placeholder .ph-note{font-size:14px}

/* footer */
footer{background:var(--navy2);color:#8fa3b8;padding:34px 0;font-size:14px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.foot-brand{font-weight:800;color:#fff;font-size:16px}

/* chooser */
.chooser{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,var(--navy2),var(--navy));color:#fff;text-align:center;padding:40px 24px}
.chooser h1{font-size:34px;margin:18px 0 8px}
.chooser p{color:#a9bccd;margin-bottom:34px}
.chooser .langs{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.chooser .langs a{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:19px;font-weight:700;padding:16px 38px;border-radius:14px}
.chooser .langs a:hover{background:var(--teal);border-color:var(--teal);text-decoration:none}
.chooser .langs a.suggest{border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,159,138,.35)}

@media(max-width:760px){
  .hero h1{font-size:32px}
  .cards,.contact-cards,.placeholders{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .main-nav{display:none}
  .header-inner{gap:14px}
  .pulse{display:none}
}