:root {
  --primary: #e2721f;
  --primary-dark: #c85f13;
  --dark: #1f2937;
  --text: #374151;
  --muted: #6b7280;
  --bg: #f7f7f5;
  --card: #ffffff;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 14px rgba(0,0,0,.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans", "Noto Sans Arabic", "Noto Sans KR", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 头部 ---------- */
.site-header {
  background: var(--dark);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.brand { font-size: 1.25rem; font-weight: 700; letter-spacing: .5px; white-space: nowrap; }
.brand:hover { color: #ffd9b0; }

.nav { display: flex; gap: 6px; }
.nav-link { padding: 8px 14px; border-radius: 8px; color: #e5e7eb; font-size: .95rem; }
.nav-link:hover { background: rgba(255,255,255,.1); color: #fff; }
.nav-link.active { background: var(--primary); color: #fff; }

.header-right { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.4rem; cursor: pointer; }

/* 语言切换器 */
.lang-switcher { position: relative; }
.lang-btn {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: .9rem;
}
.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 140px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.lang-menu.open { display: block; }
.lang-menu li a { display: block; padding: 9px 14px; font-size: .92rem; }
.lang-menu li a:hover { background: #f3f4f6; }
.lang-menu li a.active { background: var(--primary); color: #fff; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #2b3a4a 55%, #3a4a3a 100%);
  color: #fff;
  padding: 90px 0;
  text-align: center;
}
.hero h1 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 18px; line-height: 1.25; }
.hero p { font-size: 1.15rem; color: #d1d5db; max-width: 640px; margin: 0 auto 30px; }

/* ---------- 按钮 ---------- */
.btn { display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 600; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); margin-left: 8px; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 区块 ---------- */
.section { padding: 60px 0; }
.section-alt { background: #fff; }
.section-title { font-size: 1.7rem; color: var(--dark); margin-bottom: 10px; }
.section-sub { color: var(--muted); margin-bottom: 30px; max-width: 720px; }

/* ---------- 类目卡片 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
.cat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.cat-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.cat-card-name { display: block; font-weight: 600; color: var(--dark); font-size: 1.05rem; }
.cat-card-count { display: inline-block; margin-top: 8px; font-size: .85rem; color: var(--muted); background: var(--bg); padding: 2px 10px; border-radius: 999px; }

/* ---------- 产品卡片 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 18px; }
.prod-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.prod-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.prod-thumb {
  display: block;
  height: 150px;
  background: linear-gradient(135deg, #eef2f6 0%, #dfe6ec 100%);
  position: relative;
}
.prod-thumb::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,.6) 0 12px, rgba(255,255,255,0) 12px 24px);
}
.prod-thumb.big { height: 320px; }
.prod-name { display: block; padding: 14px 16px 6px; font-weight: 600; color: var(--dark); }
.prod-more { display: block; padding: 0 16px 14px; font-size: .85rem; color: var(--primary); }

/* ---------- 面包屑 ---------- */
.breadcrumb { background: #fff; border-bottom: 1px solid var(--border); padding: 12px 0; font-size: .9rem; color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }

/* ---------- 产品详情 ---------- */
.product-head { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; margin-bottom: 40px; }
.product-media { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.product-info h1 { font-size: 1.9rem; color: var(--dark); margin-bottom: 14px; }
.product-info p { color: var(--muted); margin-bottom: 22px; }
.related-title { margin-top: 10px; }

/* ---------- 关于/联系 ---------- */
.about-text { max-width: 760px; color: var(--text); font-size: 1.02rem; }
.about-text p { margin-bottom: 14px; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--border); font-size: 1.02rem; }
.contact-list strong { display: inline-block; min-width: 120px; color: var(--dark); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #cbd5e1; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; padding-top: 48px; padding-bottom: 40px; }
.footer-col h4 { color: #fff; margin-bottom: 14px; font-size: 1.05rem; }
.footer-col p { font-size: .92rem; }
.footer-links li { margin-bottom: 7px; }
.footer-links a { font-size: .92rem; }
.footer-links a:hover { color: #ffd9b0; }
.footer-contact li { font-size: .92rem; margin-bottom: 7px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 16px 0; font-size: .85rem; color: #94a3b8; }

/* ---------- RTL（阿拉伯语） ---------- */
[dir="rtl"] .lang-menu { right: auto; left: 0; }
[dir="rtl"] .btn-ghost { margin-left: 0; margin-right: 8px; }
[dir="rtl"] .prod-more,
[dir="rtl"] .breadcrumb,
[dir="rtl"] .contact-list strong { text-align: right; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--dark);
    flex-direction: column;
    padding: 12px 20px 20px;
  }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .product-head { grid-template-columns: 1fr; }
}