:root{
  --red:#9E1B32;
  --red-bright:#C8102E;
  --gold:#C8A45C;
  --gold-soft:#E4C98A;
  --ink:#1F1A17;
  --paper:#FAF6EF;
  --paper-2:#F2E9DC;
  --muted:#6B5E52;
  --line:rgba(158,27,50,.14);
  --shadow:0 10px 30px rgba(31,26,23,.08);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.7;
}
.en{display:none}
body.lang-en .zh{display:none}
body.lang-en .en{display:inline}

/* ===== 导航 ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(250,246,239,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:24px;padding:14px 20px}
.brand{text-decoration:none;color:var(--ink);display:flex;flex-direction:column;line-height:1.1}
.brand-zh{font-size:20px;font-weight:800;letter-spacing:2px}
.brand-en{font-size:11px;letter-spacing:1px;color:var(--muted)}
.links{display:flex;gap:22px;margin-left:auto}
.links a{text-decoration:none;color:var(--ink);font-size:15px;opacity:.82;transition:opacity .2s,color .2s}
.links a:hover{opacity:1;color:var(--red)}
.lang-btn{margin-left:8px;border:1px solid var(--red);color:var(--red);background:transparent;border-radius:999px;padding:6px 14px;font-size:13px;cursor:pointer;transition:all .2s}
.lang-btn:hover{background:var(--red);color:#fff}

/* ===== Hero ===== */
.hero{position:relative;min-height:78vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden;
  background:radial-gradient(120% 120% at 50% 0%,#7d1426 0%,#9E1B32 45%,#5c1020 100%);}
.hero-overlay{position:absolute;inset:0;opacity:.18;
  background-image:radial-gradient(circle at 20% 30%,var(--gold) 0 2px,transparent 3px),
    radial-gradient(circle at 80% 20%,var(--gold-soft) 0 2px,transparent 3px),
    radial-gradient(circle at 70% 70%,var(--gold) 0 2px,transparent 3px),
    radial-gradient(circle at 30% 80%,var(--gold-soft) 0 2px,transparent 3px);
  background-size:140px 140px,180px 180px,160px 160px,200px 200px;}
.hero-content{position:relative;z-index:2;max-width:780px;padding:0 20px}
.hero-kicker{letter-spacing:4px;font-size:13px;color:var(--gold-soft);margin-bottom:18px;text-transform:uppercase}
.hero h1{font-size:clamp(30px,5vw,52px);font-weight:800;line-height:1.25;margin-bottom:20px;text-shadow:0 2px 18px rgba(0,0,0,.25)}
.hero-sub{font-size:clamp(15px,2vw,18px);opacity:.92;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;text-decoration:none;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;transition:transform .15s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--gold);color:#3a2a10;box-shadow:0 8px 20px rgba(200,164,92,.35)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.7);color:#fff}

/* ===== 通用区块 ===== */
.section{padding:84px 0}
.section-alt{background:var(--paper-2)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section-title{text-align:center;font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:14px;position:relative}
.section-title::after{content:"";display:block;width:54px;height:4px;background:var(--red);margin:14px auto 0;border-radius:2px}
.section-lead{text-align:center;color:var(--muted);max-width:680px;margin:0 auto 44px}

/* ===== 关于 ===== */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.about-text p{margin-bottom:18px;font-size:16px}
.about-stats{list-style:none;display:flex;flex-direction:column;gap:18px}
.about-stats li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.about-stats strong{font-size:30px;color:var(--red);font-weight:800}
.about-stats span{font-size:14px;color:var(--muted);margin-top:2px}

/* ===== 产品 ===== */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 18px;text-align:center;box-shadow:var(--shadow);transition:transform .18s,box-shadow .2s}
.product-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(31,26,23,.14)}
.product-char{width:72px;height:72px;border-radius:50%;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--red),#c0392b)}
.product-card h3{font-size:17px;margin-bottom:6px}
.product-card p{font-size:13px;color:var(--muted);line-height:1.5}

/* ===== 优势 ===== */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 22px;box-shadow:var(--shadow)}
.why-icon{width:46px;height:46px;border-radius:12px;background:var(--paper-2);color:var(--red);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;margin-bottom:14px}
.why-card h3{font-size:17px;margin-bottom:8px}
.why-card p{font-size:14px;color:var(--muted)}

/* ===== 联系 ===== */
.contact-wrap{text-align:center}
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px}
.contact-card span{font-size:13px;color:var(--muted)}
.contact-card strong{font-size:16px;color:var(--ink);word-break:break-all}
.contact-note{margin-top:24px;font-size:13px;color:var(--muted)}

/* ===== 页脚 ===== */
.footer{background:var(--ink);color:#fff;padding:30px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:14px;opacity:.85}
.footer-domain{color:var(--gold)}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr;gap:28px}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .contact-cards{grid-template-columns:1fr}
}
@media (max-width:560px){
  .links{display:none}
  .product-grid{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:1fr}
}