:root{
  --ink:#12211f; --ink-2:#3d5250; --ink-3:#6b8280;
  --brand:#0f766e; --brand-d:#0b5d57; --brand-l:#e6f4f2;
  --bg:#ffffff; --bg-2:#f6f9f8; --line:#e2ebe9;
  --r:14px; --max:1120px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.75; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px;white-space:nowrap}
.logo i{width:32px;height:32px;border-radius:9px;background:var(--brand);color:#fff;display:grid;place-items:center;font-style:normal;font-size:16px;font-weight:800}
.nav-right{display:flex;align-items:center;gap:22px}
.menu{display:flex;gap:28px;font-size:15px;color:var(--ink-2)}
.menu a:hover{color:var(--brand)}

/* 语言切换 */
.lang{
  display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;font-size:13.5px;font-weight:600;
  color:var(--ink-2);transition:.2s;white-space:nowrap;
}
.lang:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-l)}
.lang .globe{font-size:14px;line-height:1}

.btn{display:inline-block;padding:11px 22px;border-radius:999px;font-size:15px;font-weight:600;transition:.2s;white-space:nowrap}
.btn-p{background:var(--brand);color:#fff}
.btn-p:hover{background:var(--brand-d)}
.btn-o{border:1px solid var(--line);color:var(--ink-2)}
.btn-o:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 首屏 ---------- */
.hero{padding:88px 0 76px;background:linear-gradient(180deg,#fbfdfc,#fff)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.tag{display:inline-flex;align-items:center;gap:8px;background:var(--brand-l);color:var(--brand-d);padding:7px 15px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:22px}
.tag b{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block}
h1{font-size:44px;line-height:1.28;letter-spacing:-.5px;font-weight:800;margin-bottom:20px}
h1 em{font-style:normal;color:var(--brand)}
.lead{font-size:17px;color:var(--ink-2);margin-bottom:32px;max-width:520px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:0 18px 44px -28px rgba(15,118,110,.35)}
.hero-card h3{font-size:15px;color:var(--ink-3);font-weight:600;margin-bottom:18px}
.kv{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.kv:last-child{border:0;padding-bottom:0}
.kv span{color:var(--ink-3)}
.kv b{font-weight:700;text-align:right}

/* ---------- 通用区块 ---------- */
section{padding:78px 0}
.sec-h{text-align:center;max-width:660px;margin:0 auto 52px}
.sec-h h2{font-size:32px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px}
.sec-h p{color:var(--ink-2);font-size:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;transition:.25s}
.card:hover{border-color:#bfdcd8;box-shadow:0 14px 36px -26px rgba(15,118,110,.4);transform:translateY(-3px)}
.card .num{font-size:13px;font-weight:800;color:var(--brand);letter-spacing:1px;margin-bottom:14px}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--ink-2)}

.alt{background:var(--bg-2)}
.list{display:grid;grid-template-columns:1fr 1fr;gap:18px 40px;margin-top:8px}
.li{display:flex;gap:14px;align-items:flex-start}
.li i{flex:0 0 22px;height:22px;border-radius:50%;background:var(--brand-l);color:var(--brand);display:grid;place-items:center;font-size:12px;font-style:normal;font-weight:800;margin-top:4px}
.li div b{display:block;font-size:15.5px;margin-bottom:2px}
.li div span{font-size:14px;color:var(--ink-3)}

/* ---------- 联系 ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.contact h2{font-size:30px;font-weight:800;margin-bottom:16px}
.contact p{color:var(--ink-2);margin-bottom:26px}
.cline{display:flex;align-items:center;gap:14px;padding:15px 0;border-bottom:1px solid var(--line)}
.cline span{font-size:13px;color:var(--ink-3);width:72px;flex:0 0 72px}
.cline b{font-size:16px;font-weight:700}
.form{background:var(--bg-2);border:1px solid var(--line);border-radius:18px;padding:30px}
.form label{display:block;font-size:13.5px;font-weight:600;margin:0 0 7px;color:var(--ink-2)}
.form input,.form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;margin-bottom:16px;background:#fff;color:var(--ink)}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--brand)}
.form button{width:100%;padding:13px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:15.5px;font-weight:700;cursor:pointer;font-family:inherit}
.form button:hover{background:var(--brand-d)}
.form .note{font-size:12.5px;color:var(--ink-3);margin:12px 0 0;line-height:1.6}

/* ---------- 页脚 ---------- */
footer{background:#0d1f1d;color:#a9bfbc;padding:52px 0 30px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:38px}
footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
footer a{display:block;margin-bottom:10px;color:#a9bfbc}
footer a:hover{color:#fff}
.copy{border-top:1px solid #1f3634;padding-top:22px;display:flex;justify-content:space-between;font-size:13px;color:#7d9592;flex-wrap:wrap;gap:10px}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .menu{display:none}
  .nav-right{gap:12px}
}
@media (max-width:900px){
  .hero-grid,.contact{grid-template-columns:1fr;gap:36px}
  .grid3{grid-template-columns:1fr}
  .list{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr;gap:28px}
  h1{font-size:32px}
  section{padding:56px 0}
  .hero{padding:56px 0 48px}
  .lang{padding:0 11px;font-size:12.5px}
  .btn{padding:9px 16px;font-size:14px}
}