/* ========== 厦门沛顺进出口有限公司官网全局样式 ========== */
:root {
  /* 品牌色取自官方 logo：六边形标志 #0B2E74，中文字样 #151727 */
  --primary: #0b2e74;
  --primary-dark: #071f52;
  --primary-mid: #17439a;
  --primary-light: #e8edf7;
  --text: #151727;
  --text-muted: #6b7280;
  --bg: #ffffff;
  --bg-gray: #f4f6fb;
  --border: #e3e8f2;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(11, 46, 116, .08);
  --shadow-lg: 0 8px 30px rgba(11, 46, 116, .16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ========== 顶部导航 ========== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.navbar-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.brand { font-size: 20px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 10px; letter-spacing: .5px; }
.brand:hover { color: var(--text); }
.brand-mark { height: 34px; width: auto; flex-shrink: 0; }

.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { color: var(--text); font-size: 15px; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

.lang-switch {
  border: 1px solid var(--border); background: var(--bg);
  border-radius: 999px; padding: 5px 14px; font-size: 13px;
  cursor: pointer; color: var(--text); font-weight: 600;
  transition: all .2s;
}
.lang-switch:hover { border-color: var(--primary); color: var(--primary); }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: .3s; }

/* ========== Hero ========== */
.hero {
  min-height: 480px; margin-top: 64px;
  background: linear-gradient(135deg, #05173c 0%, var(--primary) 55%, var(--primary-mid) 100%);
  color: #fff; display: flex; align-items: center;
}
.hero-inner { max-width: 1160px; margin: 0 auto; padding: 72px 24px; width: 100%; }
.hero h1 { font-size: 42px; line-height: 1.3; margin-bottom: 18px; }
.hero p { font-size: 18px; opacity: .9; max-width: 620px; margin-bottom: 32px; }
.btn {
  display: inline-block; padding: 12px 32px; border-radius: 8px;
  font-size: 16px; font-weight: 600; cursor: pointer; border: none; transition: all .2s;
}
.btn-primary { background: #fff; color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); color: var(--primary-dark); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); margin-left: 12px; }
.btn-outline:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ========== 通用区块 ========== */
section { padding: 80px 0; }
section.alt { background: var(--bg-gray); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 32px; margin-bottom: 10px; }
.section-title p { color: var(--text-muted); font-size: 16px; max-width: 640px; margin: 0 auto; }
.section-title .divider { width: 48px; height: 4px; background: var(--primary); border-radius: 2px; margin: 16px auto 0; }

/* ========== 公司介绍 ========== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-grid img { border-radius: var(--radius); box-shadow: var(--shadow); }
/* 左栏两张实拍（厂区 + 车间）纵向排列；各自保持原始比例，不做统一裁切 */
.about-photos { display: flex; flex-direction: column; gap: 16px; }
.about-text h3 { font-size: 24px; margin-bottom: 16px; }
.about-text p { color: var(--text-muted); margin-bottom: 14px; }

/* ========== 核心优势 ========== */
/* 首页三条实证（取自产品目录 2.jpg 的 "OUR CORE STRENGTHS"）：
   20 年模具工程 / 7 年精密配件制造 / 卡斯卡特供货商 */
.strength-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.strength-card {
  background: var(--bg-gray); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 26px;
}
.strength-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; }
.strength-card p { color: var(--text-muted); font-size: 14px; }

/* ========== 业务范围 ========== */
.scope-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scope-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; transition: all .25s;
}
.scope-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }
.scope-icon {
  width: 52px; height: 52px; border-radius: 12px; background: var(--primary-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.scope-icon svg { width: 26px; height: 26px; stroke: var(--primary); }
.scope-card h3 { font-size: 18px; margin-bottom: 8px; }
.scope-card p { color: var(--text-muted); font-size: 14px; }

/* ========== 产品卡片 ========== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; transition: all .25s;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
/* contain 而非 cover：产品图统一为 4:3 白底画布，比例一致时两者等价，
   但日后换成非 4:3 的照片也不会被裁掉主体 */
.product-card img { width: 100%; aspect-ratio: 4/3; object-fit: contain; background: #fff; }
.product-card .card-body { padding: 18px 20px 22px; }
.product-card h3 { font-size: 17px; margin-bottom: 6px; }
.product-card p { color: var(--text-muted); font-size: 14px; }
.center-btn { text-align: center; margin-top: 40px; }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-dark); color: #fff; }

/* ========== 质量检测 ========== */
/* 首页"质量检测"区的四个检测指标（数据取自产品目录第 15 页） */
.quality-chips { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.quality-chips div {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 12px; text-align: center; font-size: 17px; font-weight: 600;
}
/* 质量检测页的 01 / 02 / 03 三块 */
.quality-block { margin-bottom: 72px; }
.quality-block:last-child { margin-bottom: 0; }
.quality-block h3 { font-size: 24px; margin-bottom: 12px; }
.quality-block h3 .qn { color: var(--primary); margin-right: 10px; }
.quality-block > p { color: var(--text-muted); max-width: 720px; }
/* 图文左右分栏（01 拉力测试）。原图是竖版（约 2:3），限高避免把整块撑得过高 */
.quality-split { display: grid; grid-template-columns: auto 1fr; gap: 44px; align-items: center; }
.quality-split > img { height: 480px; width: auto; max-width: 100%; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
/* 报告/证书并排（02 材料性能检测、03 第三方检测报告）
   各份报告原图比例不一致，统一给固定高度 + contain，保证图注对齐、不拉伸变形 */
.quality-figures { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 24px; }
.quality-figures figure { margin: 0; }
.quality-figures img {
  width: 100%; height: 440px; object-fit: contain;
  border: 1px solid var(--border); border-radius: var(--radius); background: #fff;
}
.quality-figures figcaption { margin-top: 10px; text-align: center; color: var(--text-muted); font-size: 14px; }

/* ========== 联系方式 ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.contact-item .icon {
  flex-shrink: 0; width: 42px; height: 42px; border-radius: 10px;
  background: var(--primary-light); display: flex; align-items: center; justify-content: center;
}
.contact-item .icon svg { width: 20px; height: 20px; stroke: var(--primary); }
.contact-item h4 { font-size: 15px; margin-bottom: 2px; }
.contact-item p { color: var(--text-muted); font-size: 14px; }

.contact-form { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 15px; font-family: inherit; transition: border .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 110px; }

/* ========== 页脚 ========== */
footer { background: #081a41; color: #a8b4cc; padding: 40px 0 24px; font-size: 14px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; margin-bottom: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: 8px; letter-spacing: .5px; }
.footer-mark { height: 30px; width: auto; flex-shrink: 0; }
.footer-links { display: flex; gap: 24px; list-style: none; flex-wrap: wrap; }
.footer-links a { color: #a8b4cc; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #17305f; padding-top: 20px; text-align: center; font-size: 13px; }

/* ========== 产品弹窗 ========== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200; background: rgba(17, 24, 39, .55);
  display: none; align-items: center; justify-content: center; padding: 24px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg); border-radius: var(--radius); max-width: 820px; width: 100%;
  max-height: 88vh; overflow-y: auto; position: relative; box-shadow: var(--shadow-lg);
  animation: pop .25s ease;
}
@keyframes pop { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 36px; height: 36px;
  border: none; border-radius: 50%; background: var(--bg-gray); cursor: pointer;
  font-size: 18px; line-height: 1; color: var(--text); z-index: 2;
}
.modal-close:hover { background: var(--border); }
.modal-body { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
/* 弹窗左栏：主图 + 缩略图（多图产品才出现缩略图，见 main.js） */
.modal-gallery { display: flex; flex-direction: column; justify-content: center; background: #fff; }
.modal-gallery .gallery-main { width: 100%; aspect-ratio: 4/3; object-fit: contain; background: #fff; }
.modal-gallery .gallery-thumbs { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px; }
.modal-gallery .gallery-thumbs img {
  width: 72px; height: 54px; object-fit: cover; background: #fff;
  border-radius: 8px; border: 2px solid transparent; cursor: pointer;
  opacity: .6; transition: opacity .2s, border-color .2s;
}
.modal-gallery .gallery-thumbs img:hover { opacity: 1; }
.modal-gallery .gallery-thumbs img.active { border-color: var(--primary); opacity: 1; }
.modal-info { padding: 32px 28px; }
.modal-info h3 { font-size: 22px; margin-bottom: 10px; }
.modal-info > p { color: var(--text-muted); font-size: 14px; margin-bottom: 20px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 20px; }
.spec-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); }
.spec-table td:first-child { color: var(--text-muted); width: 40%; }
.spec-table td:last-child { font-weight: 500; }

/* ========== 页面标题条 ========== */
.page-header {
  margin-top: 64px; padding: 64px 0; text-align: center; color: #fff;
  background: linear-gradient(135deg, #05173c 0%, var(--primary) 55%, var(--primary-mid) 100%);
}
.page-header h1 { font-size: 36px; margin-bottom: 10px; }
.page-header p { opacity: .9; font-size: 16px; }

/* ========== 响应式 ========== */
@media (max-width: 1000px) {
  .scope-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .quality-chips { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .scope-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .quality-figures { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .about-grid, .contact-grid, .modal-body, .quality-split { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 16px; }
  .menu-toggle { display: block; }
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: flex-start;
    padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--border);
    transform: translateY(-120%); transition: transform .3s; box-shadow: var(--shadow);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 10px 0; }
  section { padding: 56px 0; }
  .modal-gallery .gallery-main { aspect-ratio: 16/10; }
  .quality-split > img { height: auto; width: 100%; }
  .strength-grid { grid-template-columns: 1fr; }
}