/* ============================================================
   dgygwh.com - 悦刚进出口 有色金属贵金属贸易 双语官网
   全局样式
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #0F4C81;      /* 主色 - 深蓝 */
  --secondary: #C8A24B;    /* 辅色 - 金属金 */
  --secondary-dark: #A9852F;
  --text: #333;
  --text-light: #666;
  --bg: #fff;
  --bg-light: #f5f7fa;
  --border: #e5e7eb;
  --footer: #0b2a47;
}

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

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

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

/* ---------- 顶部导航 ---------- */
.header {
  background: var(--primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  flex-wrap: wrap;
  gap: 10px;
}
.logo { font-size: 22px; font-weight: 700; letter-spacing: 1px; }
.logo span { color: var(--secondary); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.nav-menu a { color: #fff; font-size: 15px; transition: color .2s; }
.nav-menu a:hover { color: var(--secondary); }
.nav-menu a.active { color: var(--secondary); font-weight: 600; }

.lang-switch { display: flex; gap: 6px; margin-left: 6px; }
.lang-switch button {
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  padding: 5px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all .2s;
}
.lang-switch button.active {
  background: var(--secondary);
  border-color: var(--secondary);
  color: #fff;
  font-weight: 600;
}

/* 移动端菜单 */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,.4);
  color: #fff;
  font-size: 24px;
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
}

/* ---------- 首页 Banner ---------- */
.banner {
  background: linear-gradient(120deg, var(--primary) 0%, #1a6bb0 100%);
  color: #fff;
  padding: 90px 0;
}
.banner h1 { font-size: 40px; line-height: 1.3; margin-bottom: 16px; font-weight: 700; }
.banner p { font-size: 18px; max-width: 720px; opacity: .92; margin-bottom: 30px; }
.btn-group { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 5px;
  font-size: 16px;
  font-weight: 600;
  transition: all .2s;
}
.btn-primary { background: var(--secondary); color: #fff; }
.btn-primary:hover { background: var(--secondary-dark); }
.btn-outline { background: transparent; border: 2px solid #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.15); }

/* ---------- 数据统计 ---------- */
.stats { background: var(--bg-light); padding: 40px 0; border-bottom: 1px solid var(--border); }
.stats-row { display: flex; gap: 30px; flex-wrap: wrap; justify-content: space-around; }
.stat-item { text-align: center; padding: 10px; }
.stat-item .num { font-size: 40px; font-weight: 700; color: var(--primary); }
.stat-item .label { color: var(--text-light); font-size: 15px; margin-top: 4px; }

/* ---------- 通用区块 ---------- */
.section { padding: 70px 0; }
.section.alt { background: var(--bg-light); }
.section-title {
  text-align: center;
  font-size: 30px;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 700;
}
.section-sub {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 44px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 26px 22px;
  background: var(--bg);
  transition: transform .25s, box-shadow .25s;
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-5px); box-shadow: 0 10px 24px rgba(0,0,0,.08); }
.product-card h3 { color: var(--primary); margin-bottom: 10px; font-size: 19px; }
.product-card .desc { color: var(--text-light); font-size: 14px; flex: 1; margin-bottom: 16px; }
.product-card .en-name { color: var(--secondary-dark); font-size: 13px; font-weight: 600; margin-bottom: 8px; text-transform: uppercase; letter-spacing: .5px; }
.product-card .btn-sm {
  align-self: flex-start;
  padding: 8px 20px;
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: 4px;
  font-size: 14px;
  transition: all .2s;
}
.product-card .btn-sm:hover { background: var(--primary); color: #fff; }

/* ---------- 关于区块 ---------- */
.about-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-text p { margin-bottom: 16px; color: var(--text-light); }
.about-text h3 { color: var(--primary); margin-bottom: 12px; }
.tag-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.tag {
  background: var(--bg-light);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
}

/* ---------- 资质区块 ---------- */
.cert-center { text-align: center; }
.cert-badge {
  display: inline-block;
  background: linear-gradient(135deg, #f7e9c9, #ecd9a8);
  border: 2px solid var(--secondary);
  border-radius: 14px;
  padding: 34px 50px;
  margin-bottom: 20px;
}
.cert-badge .cn { font-size: 20px; font-weight: 700; color: var(--primary); }
.cert-badge .no { font-size: 30px; font-weight: 700; color: var(--secondary-dark); margin-top: 8px; letter-spacing: 1px; }
.cert-badge .org { color: var(--text-light); margin-top: 6px; font-size: 14px; }

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  background: var(--bg);
  transition: transform .25s, box-shadow .25s;
}
.news-item:hover { transform: translateY(-5px); box-shadow: 0 10px 24px rgba(0,0,0,.08); }
.news-item .date { color: var(--secondary-dark); font-size: 13px; margin-bottom: 8px; }
.news-item h3 { color: var(--primary); font-size: 17px; margin-bottom: 8px; }
.news-item p { color: var(--text-light); font-size: 14px; }

/* ---------- 内页通用 ---------- */
.page-hero {
  background: linear-gradient(120deg, var(--primary) 0%, #1a6bb0 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { font-size: 34px; margin-bottom: 10px; }
.page-hero p { opacity: .9; max-width: 680px; margin: 0 auto; }

.page-body { padding: 60px 0; }

/* 关于 - 优势 */
.advantage-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 30px; }
.advantage {
  background: var(--bg-light);
  border-radius: 10px;
  padding: 26px;
  border-left: 4px solid var(--secondary);
}
.advantage h4 { color: var(--primary); margin-bottom: 8px; font-size: 17px; }
.advantage p { color: var(--text-light); font-size: 14px; }

/* 关于 - 发展历程时间轴 */
.timeline { max-width: 820px; margin: 30px auto 0; position: relative; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(var(--secondary), var(--primary));
  border-radius: 2px;
}
.tl-item { position: relative; margin-bottom: 30px; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--secondary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--secondary);
}
.tl-item .year { color: var(--secondary-dark); font-weight: 700; font-size: 16px; }
.tl-item h4 { color: var(--primary); margin: 4px 0; font-size: 17px; }
.tl-item p { color: var(--text-light); font-size: 14px; }

/* 使命愿景 */
.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 40px; }
.mv-box {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 30px;
  border-top: 4px solid var(--secondary);
}
.mv-box h3 { color: var(--primary); margin-bottom: 12px; }
.mv-box p { color: var(--text-light); }

/* 产品页 */
.product-row {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  background: var(--bg);
  transition: box-shadow .25s;
}
.product-row:hover { box-shadow: 0 8px 20px rgba(0,0,0,.07); }
.product-row h3 { color: var(--primary); font-size: 21px; margin-bottom: 8px; }
.product-row .en { color: var(--secondary-dark); font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.product-row p { color: var(--text-light); font-size: 14px; }
.product-row .btn-sm {
  padding: 10px 26px;
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: 5px;
  white-space: nowrap;
  transition: all .2s;
}
.product-row .btn-sm:hover { background: var(--primary); color: #fff; }

/* 资质证书页 */
.cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 30px; }
.cert-card {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 30px;
  border: 1px solid var(--border);
}
.cert-card h4 { color: var(--primary); margin-bottom: 10px; font-size: 18px; }
.cert-card p { color: var(--text-light); font-size: 14px; }
.cert-card .flag { color: var(--secondary-dark); font-weight: 600; }

.promise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 30px; }
.promise {
  text-align: center;
  background: var(--bg-light);
  border-radius: 12px;
  padding: 26px 14px;
}
.promise .icon { font-size: 30px; color: var(--secondary); margin-bottom: 10px; }
.promise h4 { color: var(--primary); font-size: 16px; margin-bottom: 6px; }
.promise p { color: var(--text-light); font-size: 13px; }

/* 新闻列表 */
.news-list { max-width: 860px; margin: 0 auto; }
.news-list .news-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
  align-items: center;
}
.news-list .date-box {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 12px 16px;
  border-radius: 8px;
  min-width: 72px;
}
.news-list .date-box .d { font-size: 22px; font-weight: 700; }
.news-list .date-box .m { font-size: 13px; opacity: .85; }
.news-list h3 { color: var(--primary); font-size: 17px; margin-bottom: 6px; }
.news-list p { color: var(--text-light); font-size: 14px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info-box { background: var(--bg-light); border-radius: 12px; padding: 30px; }
.contact-info-box h3 { color: var(--primary); margin-bottom: 20px; font-size: 20px; }
.contact-line { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.contact-line .label { font-weight: 600; color: var(--primary); min-width: 90px; }
.contact-line .value { color: var(--text-light); }

.contact-form { background: var(--bg-light); border-radius: 12px; padding: 30px; }
.contact-form h3 { color: var(--primary); margin-bottom: 20px; font-size: 20px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; color: var(--text-light); font-size: 14px; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--primary); }
.btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
}
.btn-submit:hover { background: #0a3d6b; }

/* ---------- 页脚 ---------- */
.footer { background: var(--footer); color: #cdd7e0; padding: 44px 0 30px; margin-top: 40px; }
.footer-wrap { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer h4 { color: #fff; margin-bottom: 14px; font-size: 16px; }
.footer p, .footer a { font-size: 14px; color: #cdd7e0; margin-bottom: 8px; display: block; }
.footer a:hover { color: var(--secondary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 30px; padding-top: 20px; text-align: center; font-size: 13px; }

/* 表单成功提示 */
.form-tip {
  display: none;
  margin-top: 12px;
  padding: 12px;
  border-radius: 6px;
  text-align: center;
  background: #e7f6ec;
  color: #1a7f3d;
  font-size: 14px;
}
.form-tip.show { display: block; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .promise-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 14px;
    padding: 16px 0;
    border-top: 1px solid rgba(255,255,255,.2);
    margin-top: 10px;
    align-items: flex-start;
  }
  .nav-menu.open { display: flex; }
  .banner { padding: 60px 0; }
  .banner h1 { font-size: 28px; }
  .banner p { font-size: 16px; }
  .about-wrap { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .mv-grid { grid-template-columns: 1fr; }
  .product-row { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-wrap { grid-template-columns: 1fr; gap: 24px; }
  .news-list .news-item { grid-template-columns: 1fr; }
}

@media (max-width: 500px) {
  .product-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .promise-grid { grid-template-columns: 1fr; }
}