/* ============================================================
   厨房宝 chufangbao.com — 四栈共享站点样式（权威版本）
   版本: v1.0 2026-08-15
   规则: 1) 本文件是四套后端(Node/Python/Go/PHP)门户页的唯一视觉契约
         2) 模板必须使用 HTML-SKELETON.md 定义的 class，不得自行增删改
         3) 无外链字体/CDN，系统字体栈，国内访问零阻塞
   ============================================================ */

:root {
  --cf-primary: #0E7C66;        /* 厨卫青绿 */
  --cf-primary-dark: #0A5F4E;
  --cf-primary-light: #E6F2EF;
  --cf-accent: #F59E0B;         /* 暖橙 */
  --cf-accent-light: #FEF3E2;
  --cf-text: #24312D;
  --cf-text-2: #5A6B66;
  --cf-line: #E3E9E7;
  --cf-bg: #F6F8F7;
  --cf-white: #FFFFFF;
  --cf-danger: #D9534F;
  --cf-radius: 12px;
  --cf-radius-sm: 8px;
  --cf-shadow: 0 1px 3px rgba(36, 49, 45, .06), 0 4px 14px rgba(36, 49, 45, .05);
  --cf-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
             "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--cf-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--cf-text);
  background: var(--cf-white);
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

main.cf-main { flex: 1; width: 100%; }

a { color: var(--cf-primary); text-decoration: none; }
a:hover { color: var(--cf-primary-dark); text-decoration: underline; }

img { max-width: 100%; height: auto; }

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

/* ---------- 顶部导航 ---------- */
.cf-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--cf-line);
  backdrop-filter: blur(6px);
}
.cf-header .cf-container {
  display: flex; align-items: center; gap: 24px; height: 64px;
}
.cf-logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 700; color: var(--cf-text); flex-shrink: 0; }
.cf-logo img { width: 32px; height: 32px; display: block; }
.cf-logo:hover { text-decoration: none; color: var(--cf-primary); }

.cf-nav { display: flex; align-items: center; gap: 4px; flex: 1; overflow-x: auto; }
.cf-nav a {
  padding: 6px 12px; border-radius: var(--cf-radius-sm);
  color: var(--cf-text-2); font-size: 15px; white-space: nowrap;
}
.cf-nav a:hover { color: var(--cf-primary); background: var(--cf-primary-light); text-decoration: none; }
.cf-nav a.cf-active { color: var(--cf-primary); background: var(--cf-primary-light); font-weight: 600; }

.cf-header-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.cf-lang-switch { font-size: 14px; color: var(--cf-text-2); white-space: nowrap; }
.cf-lang-switch a { font-weight: 600; }

/* 移动端菜单开关（纯 CSS，无 JS 依赖） */
.cf-nav-toggle { display: none; }
.cf-nav-toggle-label {
  display: none; width: 40px; height: 40px; cursor: pointer;
  align-items: center; justify-content: center; flex-direction: column; gap: 5px;
}
.cf-nav-toggle-label span {
  display: block; width: 20px; height: 2px; background: var(--cf-text);
  transition: transform .2s, opacity .2s;
}

/* ---------- 搜索 ---------- */
.cf-search { display: flex; }
.cf-search input {
  width: 200px; padding: 8px 12px; font-size: 14px; font-family: inherit;
  border: 1px solid var(--cf-line); border-right: none;
  border-radius: var(--cf-radius-sm) 0 0 var(--cf-radius-sm);
  outline: none; background: var(--cf-bg);
}
.cf-search input:focus { border-color: var(--cf-primary); background: var(--cf-white); }
.cf-search button {
  padding: 8px 14px; font-size: 14px; font-family: inherit; cursor: pointer;
  border: none; border-radius: 0 var(--cf-radius-sm) var(--cf-radius-sm) 0;
  background: var(--cf-primary); color: var(--cf-white);
}
.cf-search button:hover { background: var(--cf-primary-dark); }

/* ---------- 首屏 Hero ---------- */
.cf-hero {
  background: linear-gradient(180deg, var(--cf-primary-light), var(--cf-white));
  padding: 56px 0 48px;
  text-align: center;
}
.cf-hero h1 { font-size: 34px; line-height: 1.4; margin-bottom: 10px; }
.cf-hero p { font-size: 17px; color: var(--cf-text-2); margin-bottom: 24px; }
.cf-hero .cf-search { justify-content: center; max-width: 520px; margin: 0 auto 20px; }
.cf-hero .cf-search input { flex: 1; width: auto; }

/* 通用胶囊 CTA（区块标题行右侧） */
.cf-cta-pill { display: inline-block; padding: 8px 20px; border-radius: 999px; background: var(--cf-accent); color: #fff; font-weight: 600; }
.cf-cta-pill:hover { background: #D98D09; color: #fff; text-decoration: none; }

/* 栏目快捷入口（首页问答百科下方） */
.cf-quick-links { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.cf-quick-links a {
  display: flex; flex-direction: column; gap: 4px; padding: 14px 8px;
  background: var(--cf-white); border: 1px solid var(--cf-line); border-radius: var(--cf-radius);
  color: var(--cf-text); font-size: 14px; text-align: center;
}
.cf-quick-links a:hover { border-color: var(--cf-primary); color: var(--cf-primary); text-decoration: none; box-shadow: var(--cf-shadow); }
.cf-quick-links .cf-ql-emoji { font-size: 22px; }

/* ---------- 通用区块 ---------- */
.cf-section { padding: 40px 0; }
.cf-section.cf-section-alt { background: var(--cf-bg); }
.cf-section-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.cf-section-title { font-size: 24px; margin-bottom: 6px; }
.cf-section-title a { color: inherit; }
.cf-section-sub { color: var(--cf-text-2); font-size: 14px; margin-bottom: 20px; }

/* ---------- 卡片列表 ---------- */
.cf-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cf-card {
  display: flex; flex-direction: column; background: var(--cf-white);
  border: 1px solid var(--cf-line); border-radius: var(--cf-radius);
  padding: 18px; transition: box-shadow .15s, border-color .15s;
}
.cf-card:hover { box-shadow: var(--cf-shadow); border-color: var(--cf-primary); }
.cf-card a { color: inherit; }
.cf-card a:hover { text-decoration: none; }
.cf-card-title { font-size: 17px; font-weight: 600; line-height: 1.5; margin-bottom: 8px; }
.cf-card-title a { color: var(--cf-text); }
.cf-card-title a:hover { color: var(--cf-primary); }
.cf-card-summary { font-size: 14px; color: var(--cf-text-2); flex: 1; }
.cf-card-meta { margin-top: 10px; font-size: 13px; color: var(--cf-text-2); display: flex; gap: 12px; }

/* 整卡可点击链接（文章卡整块区域跳转详情页，而非仅标题可点） */
.cf-card-link { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.cf-card-link:hover { text-decoration: none; }
.cf-card-link .cf-card-title { color: var(--cf-text); }
.cf-card-link:hover .cf-card-title { color: var(--cf-primary); }

/* ---------- 面包屑 ---------- */
.cf-breadcrumb { padding: 14px 0; font-size: 14px; color: var(--cf-text-2); }
.cf-breadcrumb a { color: var(--cf-text-2); }
.cf-breadcrumb a:hover { color: var(--cf-primary); }
.cf-breadcrumb .cf-sep { margin: 0 6px; color: var(--cf-line); }

/* ---------- 栏目页 ---------- */
.cf-cats-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.cf-cats-nav a {
  padding: 6px 16px; border-radius: 999px; border: 1px solid var(--cf-line);
  font-size: 14px; color: var(--cf-text-2); background: var(--cf-white);
}
.cf-cats-nav a:hover, .cf-cats-nav a.cf-active { background: var(--cf-primary); border-color: var(--cf-primary); color: #fff; text-decoration: none; }

.cf-page-title { font-size: 28px; margin-bottom: 8px; }
.cf-page-desc { color: var(--cf-text-2); margin-bottom: 24px; }

/* 列表条目（栏目页用紧凑横条卡片） */
.cf-cards.cf-cards-list { grid-template-columns: 1fr; gap: 12px; }
.cf-cards-list .cf-card { flex-direction: row; align-items: flex-start; gap: 16px; padding: 16px 18px; }
.cf-cards-list .cf-card-body { flex: 1; }
.cf-cards-list .cf-card-title { margin-bottom: 4px; }
.cf-cards-list .cf-card-link { flex-direction: row; align-items: flex-start; gap: 16px; }
.cf-card-tag {
  flex-shrink: 0; font-size: 12px; padding: 2px 10px; border-radius: 999px;
  background: var(--cf-primary-light); color: var(--cf-primary-dark); margin-top: 4px;
}

/* ---------- 分页 ---------- */
.cf-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 32px; }
.cf-pagination a, .cf-pagination span {
  min-width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center;
  padding: 0 10px; border-radius: var(--cf-radius-sm); border: 1px solid var(--cf-line);
  font-size: 14px; color: var(--cf-text-2); background: var(--cf-white);
}
.cf-pagination a:hover { border-color: var(--cf-primary); color: var(--cf-primary); text-decoration: none; }
.cf-pagination .cf-cur { background: var(--cf-primary); border-color: var(--cf-primary); color: #fff; font-weight: 600; }
.cf-pagination .cf-disabled { color: var(--cf-line); cursor: default; }

/* ---------- 文章页 ---------- */
.cf-article { max-width: 820px; margin: 0 auto; }
.cf-article-title { font-size: 30px; line-height: 1.4; margin-bottom: 12px; }
.cf-article-meta { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; color: var(--cf-text-2); margin-bottom: 24px; padding-bottom: 18px; border-bottom: 1px solid var(--cf-line); }
.cf-article-cover { border-radius: var(--cf-radius); overflow: hidden; margin-bottom: 24px; }

.cf-article-body { font-size: 17px; }
.cf-article-body h2 { font-size: 22px; margin: 30px 0 12px; padding-left: 12px; border-left: 4px solid var(--cf-primary); }
.cf-article-body h3 { font-size: 19px; margin: 24px 0 10px; }
.cf-article-body p { margin-bottom: 14px; }
.cf-article-body ul, .cf-article-body ol { margin: 0 0 14px 22px; }
.cf-article-body li { margin-bottom: 6px; }
.cf-article-body img { border-radius: var(--cf-radius-sm); }
.cf-article-body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; }
.cf-article-body th, .cf-article-body td { border: 1px solid var(--cf-line); padding: 8px 12px; text-align: left; }
.cf-article-body th { background: var(--cf-primary-light); color: var(--cf-primary-dark); }

/* 语言回退提示 */
.cf-lang-note {
  margin-bottom: 20px; padding: 10px 16px; border-radius: var(--cf-radius-sm);
  background: var(--cf-accent-light); color: #8A5B00; font-size: 14px;
}

/* ---------- FAQ（文章/工具页） ---------- */
.cf-faq { margin-top: 36px; }
.cf-faq h2 { font-size: 20px; margin-bottom: 14px; }
.cf-faq details {
  border: 1px solid var(--cf-line); border-radius: var(--cf-radius-sm);
  padding: 12px 16px; margin-bottom: 10px; background: var(--cf-white);
}
.cf-faq summary { font-weight: 600; cursor: pointer; }
.cf-faq details[open] summary { color: var(--cf-primary); margin-bottom: 6px; }
.cf-faq .cf-faq-a { color: var(--cf-text-2); font-size: 15px; }
.cf-faq .cf-faq-more { margin-top: 6px; font-size: 14px; }

/* ---------- 相关推荐 ---------- */
.cf-related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--cf-line); }
.cf-related h2 { font-size: 20px; margin-bottom: 14px; }
.cf-related ul { list-style: none; }
.cf-related li { padding: 8px 0; border-bottom: 1px dashed var(--cf-line); font-size: 15px; }
.cf-related li a { display: block; }

/* ---------- 工具页 ---------- */
.cf-tool { max-width: 720px; margin: 0 auto; }
.cf-tool-intro { color: var(--cf-text-2); margin-bottom: 24px; }
.cf-tool-form {
  background: var(--cf-bg); border: 1px solid var(--cf-line);
  border-radius: var(--cf-radius); padding: 24px;
}
.cf-field { margin-bottom: 16px; }
.cf-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.cf-field input, .cf-field select {
  width: 100%; padding: 9px 12px; font-size: 15px; font-family: inherit;
  border: 1px solid var(--cf-line); border-radius: var(--cf-radius-sm);
  outline: none; background: var(--cf-white);
}
.cf-field input:focus, .cf-field select:focus { border-color: var(--cf-primary); }
.cf-field .cf-field-error { color: var(--cf-danger); font-size: 13px; margin-top: 4px; display: none; }
.cf-field.cf-field-invalid input, .cf-field.cf-field-invalid select { border-color: var(--cf-danger); }
.cf-field.cf-field-invalid .cf-field-error { display: block; }
.cf-tool-submit {
  display: inline-block; padding: 10px 28px; border: none; cursor: pointer;
  border-radius: 999px; background: var(--cf-primary); color: #fff;
  font-size: 15px; font-weight: 600; font-family: inherit;
}
.cf-tool-submit:hover { background: var(--cf-primary-dark); }
.cf-tool-result {
  margin-top: 20px; padding: 18px 20px; border-radius: var(--cf-radius);
  background: var(--cf-primary-light); border: 1px solid #CFE5DF; display: none;
}
.cf-tool-result.cf-show { display: block; }
.cf-tool-result h3 { font-size: 16px; color: var(--cf-primary-dark); margin-bottom: 10px; }
.cf-tool-result ul { margin-left: 20px; }
.cf-tool-result li { margin-bottom: 6px; font-size: 15px; }
.cf-tool-steps { margin-top: 28px; }
.cf-tool-steps h2 { font-size: 20px; margin-bottom: 12px; }
.cf-tool-steps ol { margin-left: 22px; color: var(--cf-text-2); }

/* ---------- 搜索结果 ---------- */
.cf-search-result-info { color: var(--cf-text-2); margin-bottom: 20px; font-size: 15px; }
.cf-empty { text-align: center; padding: 60px 0; color: var(--cf-text-2); }

/* ---------- 页脚 ---------- */
.cf-footer { background: #1E2B27; color: #B9C6C2; margin-top: 56px; font-size: 14px; }
.cf-footer .cf-container { padding: 36px 20px 20px; }
.cf-footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 28px; }
.cf-footer h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.cf-footer a { color: #B9C6C2; }
.cf-footer a:hover { color: #fff; }
.cf-footer ul { list-style: none; }
.cf-footer li { margin-bottom: 8px; }
.cf-footer-links { border-top: 1px solid #33413C; }
.cf-footer-bottom { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; padding-top: 16px; }
.cf-icp a { color: #8FA09B; }
.cf-police a { color: #8FA09B; display: inline-flex; align-items: center; gap: 5px; }
.cf-police img { width: 14px; height: 14px; flex: none; }

/* ---------- 返回顶部 ---------- */
.cf-backtop {
  position: fixed; right: 20px; bottom: 32px; width: 44px; height: 44px;
  border-radius: 50%; border: none; cursor: pointer; z-index: 99;
  background: var(--cf-primary); color: #fff; font-size: 20px;
  box-shadow: var(--cf-shadow); opacity: 0; visibility: hidden;
  transition: opacity .2s, visibility .2s;
}
.cf-backtop.cf-show { opacity: 1; visibility: visible; }
.cf-backtop:hover { background: var(--cf-primary-dark); }

/* ---------- 404 ---------- */
.cf-notfound { text-align: center; padding: 90px 20px; }
.cf-notfound h1 { font-size: 72px; color: var(--cf-primary); margin-bottom: 8px; }
.cf-notfound p { color: var(--cf-text-2); margin-bottom: 24px; }

/* ---------- 响应式（≤768px） ---------- */
@media (max-width: 768px) {
  .cf-header .cf-container { height: auto; flex-wrap: wrap; padding: 10px 16px; gap: 10px; }
  .cf-nav-toggle-label { display: flex; }
  .cf-nav {
    display: none; order: 5; width: 100%; flex-direction: column;
    align-items: stretch; gap: 2px; padding: 8px 0; overflow: visible;
  }
  .cf-nav-toggle:checked ~ .cf-nav { display: flex; }
  .cf-nav a { padding: 10px 12px; }
  .cf-search input { width: 130px; }

  .cf-hero { padding: 36px 0 32px; }
  .cf-hero h1 { font-size: 24px; }
  .cf-hero .cf-search { margin-bottom: 14px; }
  .cf-quick-links { grid-template-columns: repeat(3, 1fr); gap: 10px; }

  .cf-cards { grid-template-columns: 1fr; }
  .cf-cards-list .cf-card { flex-direction: column; gap: 8px; }
  .cf-cards-list .cf-card-link { flex-direction: column; gap: 8px; }
  .cf-card-tag { align-self: flex-start; }

  .cf-section { padding: 28px 0; }
  .cf-section-title { font-size: 20px; }
  .cf-article-title { font-size: 24px; }
  .cf-article-body { font-size: 16px; }
  .cf-article-body h2 { font-size: 19px; }
  .cf-article-body table { display: block; overflow-x: auto; }

  .cf-footer-cols { grid-template-columns: 1fr; gap: 20px; }
  .cf-footer-bottom { flex-direction: column; }
}

/* ---------- 商品中心 ---------- */
.cf-price { color: #c2410c; font-weight: 600; }
.cf-price a { color: inherit; }
.cf-spec-table { width: 100%; border-collapse: collapse; margin: 20px 0 28px; }
.cf-spec-table th, .cf-spec-table td { border: 1px solid #dfe7e3; padding: 10px 14px; font-size: 14px; text-align: left; }
.cf-spec-table th { background: #f4f8f6; width: 160px; color: #42554c; font-weight: 600; }
.cf-warn-box { border: 1px solid #f0c36d; background: #fdf6e7; border-radius: 8px; padding: 14px 16px; margin: 20px 0; color: #7c5a12; line-height: 1.7; }
.cf-cats-nav a small { margin-left: 4px; opacity: .7; font-size: 12px; }

/* 商品缩略图（网格卡：顶部通栏；横条卡：左侧固定宽） */
.cf-card-thumb {
  display: block; aspect-ratio: 4 / 3; overflow: hidden;
  border-radius: 8px; margin-bottom: 12px; background: var(--cf-bg);
}
.cf-card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 首页推荐+热点排行同行双栏（推荐占 2 栏 2×2，排行占 1 栏，双栏底部对齐） */
.cf-home-duo { display: grid; grid-template-columns: 2fr 1fr; gap: 32px; }
.cf-duo-side { display: flex; flex-direction: column; }
.cf-duo-cards { grid-template-columns: repeat(2, 1fr); gap: 16px; }

/* 热点排行竖排榜单（右侧栏，随左栏高度撑开等高对齐） */
.cf-rank-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; flex: 1; justify-content: space-between; }
.cf-rank-list li {
  display: flex; align-items: center; gap: 10px;
  background: var(--cf-white); border: 1px solid var(--cf-line);
  border-radius: var(--cf-radius); padding: 8px 10px;
  transition: box-shadow .15s, border-color .15s;
}
.cf-rank-list li:hover { box-shadow: var(--cf-shadow); border-color: var(--cf-primary); }
.cf-rank-num {
  flex: none; min-width: 20px; height: 20px; padding: 0 5px; border-radius: 6px;
  background: #8aa39b; color: #fff; font-size: 12px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
}
.cf-rank-num.cf-rank-top { background: #c2410c; }
.cf-rank-thumb { flex: none; display: block; width: 64px; height: 48px; border-radius: 6px; overflow: hidden; background: var(--cf-bg); }
.cf-rank-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cf-rank-info { flex: 1; min-width: 0; }
.cf-rank-name { display: block; font-size: 13px; font-weight: 600; color: var(--cf-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cf-rank-name:hover { color: var(--cf-primary); text-decoration: none; }
.cf-rank-price { margin: 2px 0 0; font-size: 12px; }

/* 商品详情主图 */
.cf-product-img {
  display: block; max-width: 480px; margin: 0 0 20px;
  border: 1px solid var(--cf-line); border-radius: var(--cf-radius); overflow: hidden; background: var(--cf-bg);
}
.cf-product-img img { display: block; width: 100%; }

@media (max-width: 768px) {
  .cf-home-duo { grid-template-columns: 1fr; }
  .cf-product-img { max-width: 100%; }
}

/* ===== HTML sitemap ===== */
.cf-sitemap-info { font-size: 14px; color: var(--cf-text-2); margin-bottom: 8px; }
.cf-sitemap-block { margin: 28px 0; }
.cf-sitemap-block h2 { font-size: 20px; padding-bottom: 8px; border-bottom: 2px solid var(--cf-line); margin-bottom: 14px; }
.cf-sitemap-links { list-style: none; margin: 0; padding: 0; }
.cf-sitemap-links li { padding: 6px 0; }
.cf-sitemap-section { margin-bottom: 18px; }
.cf-sitemap-section h3 { font-size: 16px; margin: 10px 0 6px; }
.cf-sitemap-section h3 a { color: inherit; }
.cf-sitemap-count { color: var(--cf-text-2); font-size: 13px; font-weight: normal; margin-left: 4px; }
.cf-sitemap-depth-1 { margin-left: 22px; }
.cf-sitemap-depth-2 { margin-left: 44px; }
.cf-sitemap-articles { list-style: none; margin: 0; padding: 0; }
.cf-sitemap-articles li { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; padding: 5px 0; border-bottom: 1px dashed var(--cf-line); }
.cf-sitemap-date { color: var(--cf-text-2); font-size: 13px; white-space: nowrap; }
@media (max-width: 640px) { .cf-sitemap-articles li { flex-direction: column; gap: 2px; } }