/* ===== 设计令牌 ===== */
:root{
  --bg:#F6F2E9;
  --bg-deep:#EFE8D9;
  --surface:#FFFFFF;
  --ink:#2A3A2E;
  --ink-2:#5C6B5F;
  --ink-3:#8A968B;
  --line:#E6DFCD;
  --green:#3E6B4F;
  --green-deep:#2E5340;
  --green-soft:#E3ECE4;
  --amber:#DE9A3C;
  --amber-deep:#B87A24;
  --amber-soft:#F7E9CB;
  --terra:#C96F4A;
  --terra-soft:#F6E2D8;
  --shadow:0 12px 34px rgba(42,58,46,.10);
  --shadow-sm:0 4px 14px rgba(42,58,46,.08);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:10px;
  --serif:"Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans:"Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  font-weight:400;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--green);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
.container{max-width:1080px;margin:0 auto;padding:0 22px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--green);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--amber);border-radius:2px}
h1,h2,h3,.serif{font-family:var(--serif);font-weight:700;line-height:1.28}
section{padding:24px 0}
.section-head{max-width:640px;margin-bottom:34px}
.section-head h2{font-size:clamp(26px,4vw,36px);margin-top:10px;color:var(--ink)}
.section-head p{color:var(--ink-2);margin-top:12px;font-size:16px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:50px;padding:0 26px;border-radius:999px;
  font-size:16px;font-weight:700;letter-spacing:.02em;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  user-select:none;
}
.btn svg{width:19px;height:19px;flex:none}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 10px 24px rgba(62,107,79,.28)}
.btn-primary:hover{background:var(--green-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(62,107,79,.34)}
.btn-amber{background:var(--amber);color:#fff;box-shadow:0 10px 24px rgba(222,154,60,.30)}
.btn-amber:hover{background:var(--amber-deep);transform:translateY(-2px)}
.btn-ghost{background:var(--surface);color:var(--green);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--green);background:var(--green-soft)}
.btn-block{width:100%}

/* ===== 顶部导航 ===== */
header.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,242,233,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:900;font-size:20px;color:var(--green-deep)}
.brand .brand-icon{width:34px;height:34px;border-radius:10px;background:var(--green);color:#fff;display:grid;place-items:center}
.brand .brand-icon svg{width:22px;height:22px}
.brand small{font-family:var(--sans);font-weight:500;font-size:11px;color:var(--ink-3);letter-spacing:.08em;display:block;line-height:1.2;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:10px 14px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--ink-2);transition:.18s}
.nav-links a:hover{color:var(--green);background:var(--green-soft)}
.nav-links .nav-cta{background:var(--green);color:#fff;font-weight:700}
.nav-links .nav-cta:hover{background:var(--green-deep);color:#fff}

/* ===== 底部 ===== */
footer{background:var(--green-deep);color:rgba(255,255,255,.85)}
.footer-inner{padding:44px 0 36px;display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-start}
.footer-brand{max-width:360px}
.footer-brand .brand{color:#fff;margin-bottom:8px}
.footer-brand p{font-size:13.5px;color:rgba(255,255,255,.7)}
.footer-links{display:flex;gap:26px;flex-wrap:wrap;font-size:14px}
.footer-links a{color:rgba(255,255,255,.8)}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:16px 0;font-size:12.5px;color:rgba(255,255,255,.55);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ===== toast ===== */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:99;box-shadow:var(--shadow)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 响应式 ===== */
@media (max-width:768px){
  section{padding:52px 0}
  .nav-links .nav-link{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}