/* ===== 大连白山瓦物资贸易有限公司 · 瓦轴ZWZ授权经销商官网 ===== */
/* 共享样式：中文站 / 英文站通用 */

:root {
  --zwz-blue: #0b3d91;      /* 瓦轴蓝，主品牌色 */
  --zwz-blue-dark: #072a66;
  --accent: #e8b500;        /* 工业金，点缀 */
  --ink: #1a1f29;
  --gray: #5b6472;
  --line: #e3e7ee;
  --bg: #ffffff;
  --bg-soft: #f4f6fa;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(11, 61, 145, 0.08);
  --maxw: 1180px;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ===== 顶栏 ===== */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header .bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--zwz-blue), var(--zwz-blue-dark));
  color: #fff; font-weight: 800; display: grid; place-items: center;
  font-size: 18px; letter-spacing: 1px;
}
.brand .name { font-weight: 800; font-size: 17px; line-height: 1.2; }
.brand .sub { font-size: 12px; color: var(--zwz-blue); font-weight: 600; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { font-size: 15px; color: var(--gray); font-weight: 500; transition: color .2s; }
.nav a:hover, .nav a.active { color: var(--zwz-blue); }

.lang-switch { display: flex; gap: 6px; margin-left: 8px; }
.lang-switch a {
  padding: 6px 12px; border-radius: 20px; font-size: 13px; font-weight: 600;
  border: 1px solid var(--line); color: var(--gray);
}
.lang-switch a.active { background: var(--zwz-blue); color: #fff; border-color: var(--zwz-blue); }

.menu-btn { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--zwz-blue); }

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(232,181,0,.12), transparent),
    linear-gradient(135deg, var(--zwz-blue-dark), var(--zwz-blue));
  color: #fff; padding: 78px 0 86px;
}
.hero h1 { font-size: 40px; line-height: 1.25; font-weight: 800; margin-bottom: 14px; }
.hero .badge {
  display: inline-block; background: var(--accent); color: #1a1f29;
  font-weight: 700; font-size: 14px; padding: 6px 14px; border-radius: 20px; margin-bottom: 18px;
}
.hero p.lead { font-size: 18px; max-width: 640px; opacity: .95; margin-bottom: 28px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 30px; font-weight: 700; font-size: 15px;
  transition: transform .15s, box-shadow .2s; cursor: pointer; border: none;
}
.btn-primary { background: var(--accent); color: #1a1f29; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(232,181,0,.35); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }

/* ===== 通用区块 ===== */
section.block { padding: 66px 0; }
section.block.soft { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 42px; }
.section-head .eyebrow { color: var(--zwz-blue); font-weight: 700; letter-spacing: 2px; font-size: 13px; }
.section-head h2 { font-size: 30px; font-weight: 800; margin-top: 8px; }
.section-head p { color: var(--gray); margin-top: 10px; }

/* ===== 应用场景缩写展示 ===== */
.apps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.app-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 16px; text-align: center; box-shadow: var(--shadow);
}
.app-card .t { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.app-card .d { color: var(--gray); font-size: 13px; }

/* ===== 页脚 ===== */
.footer { background: var(--zwz-blue-dark); color: #cdd6ea; padding: 48px 0 26px; }
.footer .grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 30px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer a:hover { color: #fff; }
.footer .contact-line { font-size: 14px; margin-bottom: 8px; }
.footer .bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 30px; padding-top: 18px; font-size: 13px; color: #9fb0d6; text-align: center; }

/* ===== 内页通用 ===== */
.page-hero { background: linear-gradient(135deg, var(--zwz-blue-dark), var(--zwz-blue)); color: #fff; padding: 54px 0; }
.page-hero h1 { font-size: 32px; font-weight: 800; }
.page-hero p { opacity: .92; margin-top: 8px; }

.prose { max-width: 820px; }
.prose h3 { font-size: 21px; margin: 28px 0 12px; color: var(--zwz-blue); }
.prose p { margin-bottom: 14px; color: #2c3340; }

/* 预留提示块 */
.reserve {
  border: 1px dashed var(--accent); background: #fffdf3;
  border-radius: var(--radius); padding: 22px 24px; color: #7a6400;
  font-size: 14px; margin: 18px 0;
}
.reserve b { color: #5e4e00; }

/* ===== 产品分类导航 ===== */
.cat-nav { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }
.cat-nav a {
  border: 1px solid var(--line); border-radius: 30px; padding: 10px 20px;
  font-weight: 600; color: var(--gray); font-size: 14px;
}
.cat-nav a:hover, .cat-nav a.active { background: var(--zwz-blue); color: #fff; border-color: var(--zwz-blue); }

/* 产品列表（预留） */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); background: #fff;
}
.product-card .ph {
  height: 180px; background: repeating-linear-gradient(45deg,#eef1f7,#eef1f7 14px,#e7ebf3 14px,#e7ebf3 28px);
  display: grid; place-items: center; color: #aab3c5; font-size: 14px;
}
.product-card .body { padding: 18px; }
.product-card .body h3 { font-size: 17px; }
.product-card .body .meta { color: var(--gray); font-size: 13px; margin: 6px 0 12px; }
.product-card .body .price { color: var(--zwz-blue); font-weight: 800; font-size: 16px; }
.product-card .body .price small { color: var(--gray); font-weight: 500; font-size: 12px; }

/* 产品详情（预留） */
.spec-table { width: 100%; border-collapse: collapse; margin: 18px 0; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; font-size: 14px; }
.spec-table th { background: var(--bg-soft); width: 180px; color: var(--zwz-blue); }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
.detail-grid .ph {
  height: 320px; border-radius: var(--radius); background: repeating-linear-gradient(45deg,#eef1f7,#eef1f7 16px,#e7ebf3 16px,#e7ebf3 32px);
  display: grid; place-items: center; color: #aab3c5;
}

/* ===== 产品总览页 · 瓦轴风格大分类卡 ===== */
.cat-block {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 34px; align-items: center;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 36px; margin-bottom: 24px; box-shadow: var(--shadow); background: #fff;
  transition: box-shadow .2s ease, transform .2s ease;
}
.cat-block:hover { box-shadow: 0 10px 30px rgba(11,61,145,.14); transform: translateY(-2px); }
.cat-kicker { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--accent); text-transform: uppercase; margin-bottom: 8px; }
.cat-name { font-size: 27px; color: var(--zwz-blue); margin-bottom: 12px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.cat-name .cat-en { font-size: 15px; color: var(--gray); font-weight: 500; }
.cat-desc { color: var(--gray); font-size: 15px; line-height: 1.85; margin-bottom: 18px; }
.sub-type-list { display: flex; flex-wrap: wrap; gap: 10px; }
.sub-type-list a {
  border: 1px solid var(--zwz-blue); color: var(--zwz-blue); background: #fff;
  border-radius: 22px; padding: 8px 18px; font-size: 14px; font-weight: 600; transition: all .18s ease;
}
.sub-type-list a:hover { background: var(--zwz-blue); color: #fff; }
.cat-fig { height: 220px; border-radius: var(--radius); background: repeating-linear-gradient(45deg,#eef1f7,#eef1f7 16px,#e7ebf3 16px,#e7ebf3 32px); display: grid; place-items: center; color: #aab3c5; font-size: 14px; }
.crumb { font-size: 13px; color: var(--gray); margin-bottom: 10px; }
.crumb a { color: var(--zwz-blue); }

/* ===== 产品中心：平铺分类锚点导航 ===== */
.prod-index {
  display: flex; flex-wrap: wrap; gap: 10px;
  padding: 16px 18px; margin: 18px 0 30px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow);
}
.prod-index a {
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--ink);
  border-radius: 20px; padding: 7px 16px; font-size: 13.5px; font-weight: 600;
  text-decoration: none; transition: all .18s ease;
}
.prod-index a:hover { background: var(--zwz-blue); color: #fff; border-color: var(--zwz-blue); }

/* 平铺分类板块：序号 + 标题 */
.prod-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.prod-head .idx {
  font-size: 22px; font-weight: 800; color: var(--accent);
  background: rgba(232,181,0,.12); border-radius: 10px; padding: 2px 12px; line-height: 1.4;
}
.prod-head h2 {
  font-size: 23px; color: var(--zwz-blue); margin: 0;
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.prod-head h2 .en { font-size: 14px; color: var(--gray); font-weight: 500; letter-spacing: .3px; }
.prod-app {
  color: var(--ink); font-size: 14.5px; line-height: 1.8; margin-bottom: 18px;
  padding: 12px 16px; background: var(--bg-soft);
  border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0;
}
.prod-app b { color: var(--zwz-blue); }

/* ===== 瓦轴风格产品分类介绍块 ===== */
.prod-block {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 32px; margin-bottom: 26px; box-shadow: var(--shadow); background: #fff;
}
.prod-title { font-size: 23px; color: var(--zwz-blue); margin-bottom: 14px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.prod-en { font-size: 14px; color: var(--gray); font-weight: 500; letter-spacing: .3px; }
.prod-intro { color: var(--gray); font-size: 15px; line-height: 1.85; margin-bottom: 18px; }
.prod-types { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 22px; }
.prod-types .tag {
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--ink);
  border-radius: 20px; padding: 6px 14px; font-size: 13px; font-weight: 500;
}
.rep-head { font-size: 16px; margin-bottom: 4px; color: var(--ink); }
.rep-head b { color: var(--zwz-blue); font-size: 18px; }
.src-tag { display: inline-block; font-size: 12px; font-weight: 700; border-radius: 6px; padding: 2px 9px; vertical-align: middle; margin-left: 6px; }
.src-zwz { background: #e7f0ff; color: var(--zwz-blue); border: 1px solid #c3d6f7; }
.src-std { background: #fff4d6; color: #8a6d00; border: 1px solid #f0d98a; }
.app-line { color: var(--gray); font-size: 14px; margin: 10px 0 16px; }
.app-line b { color: var(--zwz-blue); }

/* 案例 */
.case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.case-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); background: #fff; }
.case-card h3 { color: var(--zwz-blue); margin-bottom: 8px; }
.case-card p { color: var(--gray); font-size: 14px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info .line { margin-bottom: 16px; }
.contact-info .line .k { font-weight: 700; color: var(--zwz-blue); }
.contact-info .line .v { font-size: 17px; }

/* RFQ 表单 */
.rfq-form { display: grid; gap: 16px; max-width: 560px; }
.rfq-form label { font-weight: 600; font-size: 14px; }
.rfq-form input, .rfq-form textarea, .rfq-form select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; font-size: 15px; font-family: inherit;
}
.rfq-form textarea { min-height: 110px; resize: vertical; }
.rfq-note { font-size: 13px; color: var(--gray); }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 14px; }
.faq-item h3 { font-size: 16px; color: var(--zwz-blue); margin-bottom: 6px; }
.faq-item p { color: var(--gray); font-size: 14px; }

/* ===== 授权经销商信息卡（首页/关于/认证通用） ===== */
.cred-card {
  background: linear-gradient(180deg, #ffffff 0%, #f5f8fd 100%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--zwz-blue);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: 0 2px 10px rgba(20,40,80,0.05);
}
.cred-card--wide { margin-bottom: 28px; }
.cred-card-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
.cred-card-kicker { display: inline-block; background: var(--zwz-blue); color: #fff; font-size: 12px; letter-spacing: 0.5px; padding: 4px 10px; border-radius: 4px; font-weight: 600; }
.cred-card-stars { color: var(--zwz-gold); font-size: 18px; letter-spacing: 4px; }
.cred-card-name { font-size: 20px; font-weight: 600; color: var(--ink); margin: 10px 0 16px; }
.cred-card-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 24px; padding: 16px 0; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); }
.cred-meta-item { display: flex; flex-direction: column; gap: 2px; }
.cred-meta-item .lbl { font-size: 12px; color: var(--gray); letter-spacing: 0.3px; }
.cred-meta-item .val { font-size: 15px; color: var(--ink); font-weight: 500; word-break: break-word; }
.cred-card-cta { margin-top: 18px; }

/* ===== 授权证书原图展示 ===== */
.cert-image-wrap {
  display: block;
  position: relative;
  margin: 8px auto 0;
  max-width: 720px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #f7f8fb;
  box-shadow: 0 4px 18px rgba(20,40,80,0.08);
  transition: transform .25s ease, box-shadow .25s ease;
}
.cert-image-wrap:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(20,40,80,0.14); }
.cert-image { display: block; width: 100%; height: auto; }
.cert-image-zoom {
  position: absolute; right: 12px; bottom: 12px;
  background: rgba(20,40,80,0.78); color: #fff;
  font-size: 12px; padding: 6px 12px; border-radius: 4px;
  opacity: 0; transition: opacity .2s ease;
  pointer-events: none;
}
.cert-image-wrap:hover .cert-image-zoom { opacity: 1; }
.cert-footnote { font-size: 12px; color: var(--gray); margin-top: 14px; max-width: 720px; margin-left: auto; margin-right: auto; line-height: 1.7; }

@media (max-width: 640px) {
  .cred-card-meta { grid-template-columns: 1fr; }
  .cred-card { padding: 20px; }
}

/* ===== 响应式 ===== */
@media (max-width: 920px) {
  .features { grid-template-columns: repeat(2, 1fr); }
  .apps { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid, .contact-grid, .footer .grid, .cat-block { grid-template-columns: 1fr; }
  .cat-fig { height: 200px; }
  .nav { display: none; }
  .nav.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column;
    background: #fff; padding: 16px 22px; gap: 14px; border-bottom: 1px solid var(--line); }
  .menu-btn { display: block; }
  .hero h1 { font-size: 30px; }
}
@media (max-width: 560px) {
  .features, .apps, .product-grid, .case-grid { grid-template-columns: 1fr; }
}