/*
|--------------------------------------------------------------------------
| 文件级中文注释
|--------------------------------------------------------------------------
| 本文件是促销礼品网站前台的主样式表。
| 代码保持原有视觉效果不变，只增加注释，方便你以后按模块修改颜色、间距、布局。
| 修改建议：
| 1. 品牌主色优先修改 :root 里的 --primary、--primary-dark、--accent。
| 2. 页面最大宽度优先修改 .container。
| 3. 产品卡片、详情页、响应式布局都在本文件内统一管理。
*/

/* =========================================================
   公共 CSS 样式文件
   ---------------------------------------------------------
   设计目标：
   1. 促销礼品 B2B 产品展示网站风格。
   2. 顶部导航不固定，页面滚动时会自然滚走。
   3. 简洁、容易改成 PHP / Laravel 模板。
   ========================================================= */

:root {
  --primary: #145aa8;
  --primary-dark: #0d3f78;
  --accent: #ff9f1c;
  --text: #233044;
  --muted: #6b7686;
  --line: #e5eaf0;
  --bg: #f5f7fb;
  --white: #ffffff;
  --danger: #b42318;
  --success: #147a52;
  --shadow: 0 10px 24px rgba(15, 40, 70, 0.08);
  --radius: 12px;
}

/* 全局基础设置 */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }

/* 页面通用宽度容器 */
.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

/* 顶部提示栏：不是 fixed，所以会跟着页面一起滚走 */
.top-bar {
  background: var(--primary-dark);
  color: #fff;
  font-size: 14px;
  padding: 9px 0;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* 主头部区域：logo、搜索、联系方式 */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.header-main {
  display: grid;
  grid-template-columns: 260px 1fr 220px;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
}
.logo {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.logo strong {
  font-size: 28px;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.logo span { color: var(--muted); font-size: 13px; }
.search-form {
  display: flex;
  border: 2px solid var(--primary);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
}
.search-form input {
  flex: 1;
  padding: 13px 18px;
  border: 0;
  outline: 0;
}
.search-form button {
  border: 0;
  color: #fff;
  background: var(--primary);
  padding: 0 24px;
  cursor: pointer;
}
.header-contact {
  text-align: right;
  color: var(--muted);
  font-size: 14px;
}
.header-contact b { color: var(--text); display: block; }

/* 分类导航 */
.nav-bar {
  background: var(--primary);
  color: #fff;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
}
.nav-list a {
  padding: 14px 18px;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.18);
  font-weight: 600;
}
.nav-list a:hover, .nav-list a.active { background: var(--primary-dark); }

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  padding: 11px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
}
.btn.secondary { background: #fff; color: var(--primary); }
.btn.orange { background: var(--accent); border-color: var(--accent); color: #1d2733; }
.btn.full { width: 100%; }

/* 首页 Hero */
.hero {
  background: linear-gradient(120deg, rgba(20,90,168,0.95), rgba(13,63,120,0.86)), url('https://placehold.co/1600x620?text=Promotional+Products');
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 64px 0;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
  align-items: center;
}
.hero h1 { font-size: clamp(32px, 5vw, 54px); line-height: 1.1; margin: 0 0 18px; }
.hero p { font-size: 18px; max-width: 700px; color: rgba(255,255,255,0.9); }
.hero-card {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(5px);
}
.hero-card ul { padding-left: 18px; margin: 10px 0 0; }

/* 页面标题、面包屑 */
.page-title { padding: 30px 0 18px; }
.page-title h1 { margin: 0 0 8px; font-size: 34px; }
.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  padding: 18px 0 0;
}
.breadcrumb a { color: var(--primary); }

/* 卡片通用样式 */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.section { padding: 34px 0; }
.section-title {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 18px;
}
.section-title h2 { margin: 0; font-size: 28px; }
.section-title p { margin: 4px 0 0; color: var(--muted); }

/* 分类卡片 */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.category-card {
  padding: 22px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s;
}
.category-card:hover { transform: translateY(-3px); }
.category-card strong { font-size: 20px; color: var(--primary); }
.category-card span { color: var(--muted); }

/* 产品列表 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.product-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
/*.product-card img { aspect-ratio: 1.25 / 1; object-fit: cover; background: #eef2f6; }*/
/*图片显示窗口*/

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 改成 contain 保证整张图显示 */
    background: #eef2f6;
}
.product-info { padding: 15px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-info h3 { font-size: 16px; line-height: 1.35; margin: 0; }
.product-meta { color: var(--muted); font-size: 13px; }
.price-line { margin-top: auto; }
.price-line b { color: var(--danger); font-size: 20px; }
.price-line span { color: var(--muted); font-size: 13px; }

/* 产品列表页布局：左侧筛选 + 右侧产品 */
.catalog-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 22px;
  align-items: start;
}
.sidebar {
  padding: 18px;
  position: static; /* 明确不吸附、不固定 */
}
.sidebar h3 { margin: 0 0 12px; }
.filter-list { display: grid; gap: 8px; }
.filter-list a, .filter-list button {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  text-align: left;
  cursor: pointer;
}
.filter-list .active { background: var(--primary); color: #fff; }
.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 16px;
}
.toolbar select { padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; }

/* 产品详情页：参考 B2B 促销品详情页结构，但为原创实现 */
.detail-layout {
  display: grid;
  grid-template-columns: 48% 52%;
  gap: 28px;
  align-items: start;
}
.gallery { padding: 16px; }
/*.main-image {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #eef2f6;
}*/
.main-image {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    aspect-ratio: 1.18 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
/*.main-image img { width: 100%; aspect-ratio: 1.18 / 1; object-fit: cover; }*/
.main-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.thumbs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 12px;
}
/*.thumbs button {
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
}*/
.thumbs button {
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 0;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
    aspect-ratio: 1 / 1;
}

.thumbs button.active { border-color: var(--primary); }
/*.thumbs img { aspect-ratio: 1 / 1; object-fit: cover; }*/
.thumbs img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.product-summary { padding: 2px 0; }
.category-label { color: var(--primary); font-weight: 700; margin-bottom: 6px; }
.product-summary h1 { font-size: 32px; line-height: 1.15; margin: 0 0 10px; }
.id-line { color: var(--muted); margin-bottom: 18px; }
.retail-price { color: var(--muted); font-size: 17px; }
.our-price { color: var(--danger); font-size: 26px; font-weight: 800; margin: 3px 0 12px; }
.summary-desc { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 16px 0; }
.price-table-wrap { overflow-x: auto; margin: 16px 0; }
.price-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); }
.price-table caption { text-align: left; font-weight: 800; padding: 12px 0; }
.price-table th, .price-table td { border: 1px solid var(--line); padding: 10px; text-align: center; white-space: nowrap; }
.price-table th { background: #f1f5f9; }
.price-table .highlight { color: var(--danger); font-weight: 800; }
.notice-list { color: var(--muted); font-size: 14px; padding-left: 18px; }
.action-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0; }

/* 详情页 tab 信息区域 */
.tabs { margin-top: 30px; }
.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
}
.tab-buttons button {
  border: 1px solid var(--line);
  border-bottom: 0;
  background: #f8fafc;
  padding: 12px 18px;
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  font-weight: 700;
}
.tab-buttons button.active { background: #fff; color: var(--primary); }
.tab-panel {
  display: none;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 0;
  padding: 22px;
  border-radius: 0 0 var(--radius) var(--radius);
}
.tab-panel.active { display: block; }
.detail-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.spec-item { border: 1px solid var(--line); padding: 12px; border-radius: 8px; background: #fbfdff; }
.spec-item b { display: block; margin-bottom: 4px; color: var(--text); }
.spec-item span { color: var(--muted); }

/* 表单页面 */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 700; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 12px; background: #fff; }
.field textarea { min-height: 120px; resize: vertical; }

/* About 页面 */
.content-card { padding: 26px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.feature-list { display: grid; gap: 12px; }
.feature-list div { padding: 14px; background: #f8fafc; border: 1px solid var(--line); border-radius: 8px; }

/* 页脚 */
.footer {
  margin-top: 40px;
  background: #1d2733;
  color: #dce3ed;
  padding: 36px 0 18px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.footer h3, .footer h4 { color: #fff; margin-top: 0; }
.footer a { display: block; color: #dce3ed; margin: 8px 0; }
.copyright { border-top: 1px solid rgba(255,255,255,0.12); margin-top: 24px; padding-top: 16px; color: #aeb9c8; font-size: 13px; }

/* 响应式：平板和手机 */
@media (max-width: 900px) {
  .header-main, .hero-grid, .catalog-layout, .detail-layout, .two-col, .footer-grid { grid-template-columns: 1fr; }
  .header-contact { text-align: left; }
  .category-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .container { width: min(100% - 20px, 1180px); }
  .category-grid, .product-grid, .detail-specs, .form-grid { grid-template-columns: 1fr; }
  .hero { padding: 42px 0; }
  .product-summary h1 { font-size: 26px; }
  .action-row .btn { width: 100%; }
}