/* ===== 基础与变量 ===== */
:root{
  --wood-900:#2b1c12;
  --wood-800:#3d2818;
  --wood-700:#5a3d24;
  --wood-600:#7a5334;
  --wood-500:#9c6b3e;
  --gold:#c8a06a;
  --gold-light:#e2c79b;
  --cream:#f7f1e8;
  --cream-2:#efe6d7;
  --ink:#241a12;
  --muted:#7d7267;
  --white:#ffffff;
  --shadow:0 20px 50px rgba(43,28,18,.14);
  --radius:16px;
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ===== 按钮 ===== */
.btn{
  display:inline-block;padding:14px 34px;border-radius:50px;font-size:15px;
  font-weight:600;letter-spacing:.5px;transition:.3s ease;cursor:pointer;border:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--gold),var(--wood-600));
  color:#fff;box-shadow:0 10px 24px rgba(156,107,62,.35);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(156,107,62,.45)}
.btn-ghost{border:1.5px solid var(--gold);color:var(--wood-700)}
.btn-ghost:hover{background:var(--gold);color:#fff}

/* ===== 顶部导航 ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.35s ease;padding:18px 0;
}
.header.scrolled{
  background:rgba(247,241,232,.92);backdrop-filter:blur(12px);
  padding:10px 0;box-shadow:0 6px 24px rgba(43,28,18,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;flex-direction:column;line-height:1.1}
.brand-mark{
  font-size:26px;font-weight:800;letter-spacing:2px;
  background:linear-gradient(135deg,var(--gold),var(--wood-500));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.brand-sub{font-size:11px;letter-spacing:4px;color:var(--muted);font-weight:600}
.header:not(.scrolled) .brand-sub{color:rgba(255,255,255,.75)}
.header:not(.scrolled) .brand-mark{background:linear-gradient(135deg,var(--gold-light),#fff);-webkit-background-clip:text;background-clip:text}
.nav{display:flex;align-items:center;gap:34px}
.nav-link{
  font-size:15px;font-weight:500;color:var(--ink);position:relative;transition:.3s;
}
.header:not(.scrolled) .nav-link{color:rgba(255,255,255,.92)}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;
  background:var(--gold);transition:.3s;
}
.nav-link:hover{color:var(--gold)}
.nav-link:hover::after{width:100%}
.nav-cta{
  padding:9px 22px;border-radius:50px;font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--gold),var(--wood-600));color:#fff;
  box-shadow:0 8px 20px rgba(156,107,62,.3);transition:.3s;
}
.nav-cta:hover{transform:translateY(-2px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:26px;height:2.5px;background:var(--wood-700);border-radius:2px;transition:.3s}
.header:not(.scrolled) .nav-toggle span{background:#fff}

/* ===== 首屏 ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:
    linear-gradient(120deg,rgba(43,28,18,.82),rgba(90,61,36,.55)),
    repeating-linear-gradient(95deg,#3d2818 0px,#5a3d24 6px,#4a3016 12px,#5a3d24 20px);
  background-size:cover;
}
.hero-overlay{
  position:absolute;inset:0;
  background:radial-gradient(circle at 75% 30%,rgba(200,160,106,.28),transparent 55%);
}
.hero-content{position:relative;z-index:2;color:#fff;padding-top:80px}
.hero-eyebrow{
  font-size:15px;letter-spacing:3px;color:var(--gold-light);margin-bottom:18px;
  opacity:0;animation:fadeUp .8s ease .2s forwards;
}
.hero-title{
  font-size:clamp(38px,6vw,72px);font-weight:800;line-height:1.15;margin-bottom:24px;
  letter-spacing:2px;text-shadow:0 6px 30px rgba(0,0,0,.3);
  opacity:0;animation:fadeUp .8s ease .35s forwards;
}
.hero-desc{
  font-size:clamp(15px,2vw,19px);max-width:560px;color:rgba(255,255,255,.9);margin-bottom:38px;
  opacity:0;animation:fadeUp .8s ease .5s forwards;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;opacity:0;animation:fadeUp .8s ease .65s forwards}
.hero-stats{
  display:flex;gap:48px;margin-top:64px;flex-wrap:wrap;
  opacity:0;animation:fadeUp .8s ease .8s forwards;
}
.stat b{display:block;font-size:34px;font-weight:800;color:var(--gold-light)}
.stat span{font-size:14px;color:rgba(255,255,255,.75)}
.hero-scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2}
.hero-scroll span{
  display:block;width:24px;height:40px;border:2px solid rgba(255,255,255,.6);border-radius:14px;position:relative;
}
.hero-scroll span::before{
  content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);
  width:4px;height:8px;background:#fff;border-radius:2px;animation:scrollDot 1.6s infinite;
}
@keyframes scrollDot{0%{opacity:1;top:8px}100%{opacity:0;top:22px}}
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* ===== 通用区块 ===== */
.section{padding:100px 0}
.section-head{margin-bottom:56px}
.section-head.center{text-align:center;max-width:660px;margin-left:auto;margin-right:auto}
.section-eyebrow{
  font-size:14px;letter-spacing:3px;color:var(--gold);font-weight:700;margin-bottom:14px;
}
.section-eyebrow.light{color:var(--gold-light)}
.section-title{
  font-size:clamp(28px,4vw,42px);font-weight:800;line-height:1.25;color:var(--wood-800);letter-spacing:1px;
}
.section-title.light{color:#fff}
.section-lead{font-size:17px;color:var(--muted);margin-top:16px}

/* ===== 关于我们 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center}
.about-media{position:relative}
.about-img{
  height:460px;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
}
.about-img img{width:100%;height:100%;object-fit:cover;display:block}
.about-badge{
  position:absolute;bottom:-26px;right:-16px;
  background:linear-gradient(135deg,var(--gold),var(--wood-600));color:#fff;
  padding:22px 30px;border-radius:14px;box-shadow:0 16px 36px rgba(122,83,52,.4);text-align:center;
}
.about-badge b{font-size:22px;font-weight:800;display:block}
.about-badge span{font-size:13px;opacity:.9}
.about-text .section-title{margin-bottom:24px}
.about-p{color:var(--muted);margin-bottom:18px;font-size:16px}
.about-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.about-list li{
  position:relative;padding-left:28px;font-weight:600;color:var(--wood-700);font-size:15px;
}
.about-list li::before{
  content:"✦";position:absolute;left:0;color:var(--gold);
}

/* ===== 产品 ===== */
.products{background:linear-gradient(180deg,var(--cream),var(--cream-2))}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.product-card{
  background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 12px 34px rgba(43,28,18,.08);
  transition:.4s ease;
}
.product-card:hover{transform:translateY(-10px);box-shadow:0 26px 54px rgba(43,28,18,.16)}
.product-img{height:240px;position:relative;overflow:hidden}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.product-card:hover .product-img img{transform:scale(1.06)}
.product-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(43,28,18,.28));pointer-events:none}
.product-body{padding:30px 28px 34px}
.product-body h3{font-size:22px;font-weight:700;color:var(--wood-800);margin-bottom:14px}
.product-body p{color:var(--muted);font-size:15px;margin-bottom:20px}
.product-link{color:var(--gold);font-weight:700;font-size:15px;transition:.3s}
.product-link:hover{color:var(--wood-600);letter-spacing:1px}

/* ===== 核心优势 ===== */
.advantage{
  background:
    linear-gradient(135deg,rgba(43,28,18,.94),rgba(90,61,36,.92)),
    repeating-linear-gradient(100deg,#3d2818 0,#5a3d24 8px,#43301a 18px);
}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.adv-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(226,199,155,.18);
  border-radius:var(--radius);padding:38px 26px;text-align:center;transition:.4s;
  backdrop-filter:blur(4px);
}
.adv-card:hover{background:rgba(200,160,106,.16);transform:translateY(-8px);border-color:var(--gold)}
.adv-icon{
  font-size:34px;color:var(--gold-light);margin-bottom:18px;
  width:74px;height:74px;line-height:74px;margin-inline:auto;border-radius:50%;
  background:rgba(200,160,106,.15);border:1px solid rgba(226,199,155,.3);
}
.adv-card h3{color:#fff;font-size:20px;font-weight:700;margin-bottom:12px}
.adv-card p{color:rgba(255,255,255,.72);font-size:14.5px}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:center}
.contact-list{list-style:none;margin:32px 0}
.contact-list li{
  display:flex;gap:20px;padding:16px 0;border-bottom:1px dashed rgba(122,83,52,.2);align-items:flex-start;
}
.ci-label{
  flex:0 0 64px;font-weight:700;color:var(--gold);font-size:15px;
}
.ci-value{color:var(--wood-800);font-size:16px;font-weight:500}
.ci-value a{color:var(--wood-700);font-weight:700}
.ci-value a:hover{color:var(--gold)}
.contact-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:10px}
.contact-card{
  background:linear-gradient(150deg,var(--wood-800),var(--wood-600));
  border-radius:20px;padding:6px;box-shadow:var(--shadow);
}
.cc-inner{
  border:1.5px solid rgba(226,199,155,.35);border-radius:16px;padding:46px 34px;text-align:center;color:#fff;
}
.cc-mark{
  font-size:40px;font-weight:800;letter-spacing:3px;
  background:linear-gradient(135deg,var(--gold-light),var(--gold));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:20px;
}
.cc-name{font-size:19px;font-weight:700;margin-bottom:20px}
.cc-line{font-size:17px;color:var(--gold-light);font-weight:600}
.cc-addr{font-size:14px;color:rgba(255,255,255,.7);margin-top:20px}

/* ===== 页脚 ===== */
.footer{background:var(--wood-900);color:rgba(255,255,255,.75);padding:56px 0 0}
.footer-inner{display:grid;grid-template-columns:1fr 1fr 1.4fr;gap:40px;padding-bottom:40px}
.footer-brand .brand-mark{font-size:28px}
.footer-brand p{margin-top:12px;font-size:14px}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14.5px;transition:.3s}
.footer-links a:hover{color:var(--gold)}
.footer-contact p{font-size:14px;margin-bottom:10px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);text-align:center;padding:22px 0;font-size:13px;color:rgba(255,255,255,.5);
}

/* ===== 悬浮电话 ===== */
.float-call{
  position:fixed;right:22px;bottom:26px;z-index:90;
  display:flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--gold),var(--wood-600));color:#fff;
  padding:14px 22px;border-radius:50px;font-weight:700;font-size:15px;
  box-shadow:0 12px 30px rgba(156,107,62,.5);transition:.3s;
}
.float-call:hover{transform:translateY(-4px) scale(1.04)}
.fc-icon{font-size:18px}

/* ===== 滚动出现动画 ===== */
.reveal{opacity:0;transform:translateY(40px);transition:.8s cubic-bezier(.2,.7,.3,1)}
.reveal.show{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:48px}
  .product-grid{grid-template-columns:1fr 1fr}
  .adv-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .about-badge{right:16px}
}
@media(max-width:720px){
  .nav{
    position:fixed;top:0;right:-100%;width:74%;max-width:320px;height:100vh;
    flex-direction:column;align-items:flex-start;justify-content:center;gap:28px;
    background:linear-gradient(160deg,var(--wood-800),var(--wood-600));padding:0 40px;
    transition:.4s ease;box-shadow:-10px 0 40px rgba(0,0,0,.3);
  }
  .nav.open{right:0}
  .nav-link{color:#fff!important;font-size:20px}
  .nav-cta{margin-top:10px}
  .nav-toggle{display:flex;z-index:110}
  .nav-toggle.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
  .nav-toggle.active span:nth-child(2){opacity:0}
  .nav-toggle.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
  .nav-toggle.active span{background:#fff!important}
  .section{padding:70px 0}
  .product-grid{grid-template-columns:1fr}
  .about-list{grid-template-columns:1fr}
  .hero-stats{gap:32px}
  .stat b{font-size:28px}
  .footer-inner{grid-template-columns:1fr;gap:28px}
  .fc-text{display:none}
  .float-call{padding:16px}
  .about-badge{position:static;display:inline-block;margin-top:20px}
}
@media(max-width:420px){
  .container{padding:0 18px}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .btn{width:auto}
}