:root {
  --ink: #2b2a26;
  --ink-soft: #6b675e;
  --paper: #faf7f1;
  --card: #ffffff;
  --brand: #1f5c4d;
  --brand-deep: #143d34;
  --accent: #c98a2d;
  --line: #e7e1d5;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(43, 42, 38, .08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 247, 241, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--brand-deep);
}
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, #1f5c4d 0%, #2e8b74 55%, #d8a94e 100%);
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav-links a { color: var(--ink-soft); transition: color .2s; }
.nav-links a:hover { color: var(--brand); }
.lang-btn {
  border: 1px solid var(--brand); color: var(--brand);
  background: transparent; padding: 6px 14px; border-radius: 999px;
  font-size: 13px; cursor: pointer; transition: all .2s;
}
.lang-btn:hover { background: var(--brand); color: #fff; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(216, 169, 78, .18), transparent),
    radial-gradient(900px 420px at 10% 110%, rgba(31, 92, 77, .14), transparent),
    var(--paper);
  padding: 92px 0 84px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 50px);
  line-height: 1.25; color: var(--brand-deep);
  font-weight: 800; letter-spacing: 1px;
}
.hero p.sub {
  margin: 18px auto 0; max-width: 720px;
  color: var(--ink-soft); font-size: 17px;
}
.hero-actions { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 999px;
  font-size: 15px; transition: all .2s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-deep); }
.btn-ghost { border: 1px solid var(--brand); color: var(--brand); }
.btn-ghost:hover { background: var(--brand); color: #fff; }

/* ---------- 区块通用 ---------- */
section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block; color: var(--accent); font-weight: 700;
  letter-spacing: 3px; font-size: 13px; text-transform: uppercase;
}
.section-head h2 { font-size: clamp(24px, 3.4vw, 34px); color: var(--brand-deep); margin-top: 6px; }
.section-head p { color: var(--ink-soft); margin-top: 10px; }

/* ---------- 关于我们 ---------- */
.about { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.about-text p { color: var(--ink-soft); margin-bottom: 14px; font-size: 15.5px; }
.about-company {
  border-left: 4px solid var(--accent); padding-left: 16px; margin-bottom: 18px;
}
.about-company .name { font-size: 20px; font-weight: 700; color: var(--brand-deep); }
.about-company .name-en { color: var(--ink-soft); font-size: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 12px; text-align: center;
}
.stat b { display: block; font-size: 26px; color: var(--brand); }
.stat span { font-size: 13px; color: var(--ink-soft); }

/* ---------- 产品展示 ---------- */
.cat-tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 34px; }
.cat-tab {
  border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 8px 20px; border-radius: 999px; font-size: 14px; cursor: pointer; transition: all .2s;
}
.cat-tab.active, .cat-tab:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 22px;
}
.product-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s, box-shadow .25s;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.product-card .thumb { aspect-ratio: 1/1; overflow: hidden; background: #f3efe7; }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.product-card:hover .thumb img { transform: scale(1.05); }
.product-card .info { padding: 14px 16px 18px; }
.product-card .info h3 { font-size: 14.5px; font-weight: 600; line-height: 1.5; color: var(--ink); }
.product-card .info .cat-tag {
  display: inline-block; margin-top: 10px; font-size: 12px; color: var(--brand);
  background: rgba(31, 92, 77, .08); padding: 2px 10px; border-radius: 999px;
}

/* ---------- 优势 ---------- */
.features { background: #fff; border-top: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.feature {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 22px; text-align: center;
}
.feature .icon { font-size: 30px; margin-bottom: 12px; }
.feature h3 { font-size: 16px; color: var(--brand-deep); margin-bottom: 8px; }
.feature p { font-size: 13.5px; color: var(--ink-soft); }

/* ---------- 联系我们 ---------- */
.contact-card {
  background: linear-gradient(135deg, var(--brand-deep), var(--brand));
  color: #fff; border-radius: 20px; padding: 56px 40px; text-align: center;
}
.contact-card h2 { font-size: 28px; margin-bottom: 10px; }
.contact-card p { opacity: .85; max-width: 560px; margin: 0 auto 24px; }
.contact-mail {
  display: inline-block; background: #fff; color: var(--brand-deep);
  padding: 13px 34px; border-radius: 999px; font-weight: 700; font-size: 16px;
  transition: transform .2s;
}
.contact-mail:hover { transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
footer { background: #14100c; color: rgba(255, 255, 255, .6); padding: 36px 0; font-size: 13.5px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-brand { color: #fff; font-weight: 600; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links a { display: none; }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 60px; }
}