:root{
  --paper:#F7F4EC;
  --paper-2:#EFE9DC;
  --pine:#2F4A3C;
  --pine-deep:#22382E;
  --clay:#A8763E;
  --ink:#2A2A26;
  --ink-soft:#6B6B63;
  --line:#D9D2C2;
  --white:#FFFFFF;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;
  font-size:17px;
}
h1,h2,h3{font-family:Georgia,"Times New Roman","Songti SC","SimSun",serif;font-weight:600;color:var(--pine-deep);line-height:1.25}
a{color:var(--pine);text-decoration:none}
a:hover{color:var(--clay)}

/* language switching */
body.lang-zh .en{display:none}
body.lang-en .zh{display:none}
.lang-toggle{cursor:pointer}

/* header */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,244,236,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:1080px;margin:0 auto;padding:14px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:baseline;gap:8px;font-family:Georgia,serif}
.brand .en{font-size:20px;font-weight:700;color:var(--pine);letter-spacing:.5px}
.brand .zh{font-size:15px;color:var(--clay)}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{font-size:15px;color:var(--ink-soft)}
.nav-links a:hover{color:var(--pine)}
.lang-btn{
  border:1px solid var(--line);background:var(--white);
  padding:5px 12px;border-radius:20px;font-size:13px;color:var(--ink-soft);
}
.lang-btn:hover{border-color:var(--clay);color:var(--clay)}

/* hero */
.hero{
  background:linear-gradient(160deg,var(--pine) 0%,var(--pine-deep) 100%);
  color:var(--paper);text-align:center;padding:88px 22px 76px;
}
.hero h1{color:var(--paper);font-size:clamp(34px,6vw,58px);margin-bottom:14px}
.hero .sub{font-size:clamp(16px,2.4vw,21px);color:#D8E2D8;max-width:640px;margin:0 auto 10px}
.hero .tag{display:inline-block;margin-top:18px;padding:7px 18px;border:1px solid rgba(255,255,255,.3);border-radius:30px;font-size:14px;color:var(--paper)}
.cta{
  display:inline-block;margin-top:30px;background:var(--clay);color:#fff;
  padding:13px 30px;border-radius:30px;font-size:16px;font-weight:600;
}
.cta:hover{background:#94652f;color:#fff}

/* sections */
section{padding:64px 22px;max-width:1080px;margin:0 auto}
.section-title{font-size:clamp(24px,4vw,34px);margin-bottom:8px}
.section-lead{color:var(--ink-soft);max-width:620px;margin-bottom:34px}
.center{text-align:center}

/* story */
.story{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.story .pic{
  height:280px;border-radius:16px;
  background:linear-gradient(135deg,var(--paper-2),var(--clay));
  display:flex;align-items:center;justify-content:center;color:var(--pine-deep);
  font-family:Georgia,serif;font-size:20px;text-align:center;padding:20px;
}
.story p{margin-bottom:14px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:14px;
  padding:24px;transition:.2s;
}
.card:hover{border-color:var(--clay);transform:translateY(-3px)}
.card .ic{font-size:26px;margin-bottom:10px}
.card h3{font-size:20px;margin-bottom:8px}
.card p{font-size:15px;color:var(--ink-soft)}

/* lead form */
.lead{
  background:var(--paper-2);border-radius:18px;padding:44px 26px;text-align:center;
}
.lead h2{margin-bottom:8px}
.lead p{color:var(--ink-soft);max-width:520px;margin:0 auto 22px}
form{display:flex;flex-direction:column;gap:14px;max-width:440px;margin:0 auto;text-align:left}
input[type=email]{
  padding:13px 16px;border:1px solid var(--line);border-radius:10px;font-size:16px;background:#fff;
}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-soft)}
.consent input{margin-top:5px}
.submit{
  background:var(--pine);color:#fff;border:none;padding:13px;border-radius:10px;
  font-size:16px;font-weight:600;cursor:pointer;
}
.submit:hover{background:var(--pine-deep)}
.note{font-size:12px;color:var(--ink-soft);margin-top:12px}

/* footer */
footer{background:var(--pine-deep);color:#cfd8cf;padding:40px 22px;text-align:center;font-size:14px}
footer a{color:#e6c9a3}
footer .links{margin-bottom:14px;display:flex;gap:20px;justify-content:center;flex-wrap:wrap}

/* privacy page */
.doc{max-width:760px;margin:0 auto;padding:56px 22px}
.doc h1{font-size:32px;margin-bottom:18px}
.doc h2{font-size:22px;margin:28px 0 10px}
.doc p,.doc li{color:var(--ink);margin-bottom:12px}
.doc ul{padding-left:22px}
.placeholder{background:#fff7e6;border:1px solid #f0d9a8;color:#7a5a1e;padding:8px 12px;border-radius:8px;font-size:14px;display:inline-block;margin:4px 0}

/* responsive */
@media(max-width:720px){
  .nav-links{gap:14px}
  .nav-links a{font-size:13px}
  .brand .en{font-size:17px}
  .story{grid-template-columns:1fr;gap:24px}
  section{padding:48px 18px}
  .hero{padding:64px 18px 56px}
}