/*
 Theme Name: Brainee Theme
 Theme URI: https://www.workbuddy.cn/
 Description: 可复用 B2B 企业站框架 —— CSS 变量 + Customizer 换肤，模块化模板（首页/About/联系/询价/文章列表/产品列表/产品详情），后台基线（关评论、询价/表单/多语种/SEO/统计）。
 Version: 0.1.0
 Author: 小聪
 Author URI: https://www.workbuddy.cn/
 Requires at least: 6.0
 Tested up to: 6.6
 License: GPL-2.0-or-later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
 Text Domain: brainee-theme
*/

/* =========================================================
   1. 设计令牌（Design Tokens）—— 全部可被 Customizer 覆盖
   改色/改字/改圆角只需在后台「外观 → 自定义」调整，无需动代码
   ========================================================= */
:root {
  --brainee-color-bg: #ffffff;
  --brainee-color-surface: #f5f7fa;
  --brainee-color-text: #1f2933;
  --brainee-color-muted: #647084;
  --brainee-color-primary: #1f6feb;
  --brainee-color-primary-dark: #1450b0;
  --brainee-color-accent: #0fb98c;
  --brainee-color-border: #e3e8ef;

  --brainee-font-base: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --brainee-font-head: "Fraunces", Georgia, "Times New Roman", serif;

  --brainee-radius: 12px;
  --brainee-radius-sm: 6px;
  --brainee-btn-radius: 999px;

  --brainee-container: 1200px;
  --brainee-gap: 24px;
  --brainee-section-y: 80px;

  --brainee-shadow: 0 6px 24px rgba(20, 40, 80, .08);
  --brainee-shadow-sm: 0 2px 10px rgba(20, 40, 80, .06);
  --brainee-transition: 180ms ease;
}

/* =========================================================
   2. 基础重置
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--brainee-font-base);
  color: var(--brainee-color-text);
  background: var(--brainee-color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main { flex: 1 0 auto; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brainee-color-primary); text-decoration: none; transition: color var(--brainee-transition); }
a:hover { color: var(--brainee-color-primary-dark); }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--brainee-font-head);
  color: var(--brainee-color-text);
  line-height: 1.2;
  font-weight: 600;
  margin: 0 0 .6em;
}
h1 { font-size: clamp(2rem, 4vw, 3.25rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
.container { max-width: var(--brainee-container); margin: 0 auto; padding: 0 20px; }
.section { padding: var(--brainee-section-y) 0; }
.section--surface { background: var(--brainee-color-surface); }
.text-muted { color: var(--brainee-color-muted); }
.eyebrow {
  display: inline-block; font-family: var(--brainee-font-base);
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brainee-color-primary); margin-bottom: 12px;
}
.lead { font-size: 1.15rem; color: var(--brainee-color-muted); }

/* =========================================================
   3. 按钮
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--brainee-font-base); font-weight: 700; font-size: .95rem;
  padding: 13px 26px; border-radius: var(--brainee-btn-radius);
  border: 1px solid transparent; cursor: pointer; transition: var(--brainee-transition);
  text-align: center; line-height: 1.2;
}
.btn--primary { background: var(--brainee-color-primary); color: #fff; }
.btn--primary:hover { background: var(--brainee-color-primary-dark); color: #fff; }
.btn--accent { background: var(--brainee-color-accent); color: #fff; }
.btn--accent:hover { filter: brightness(.95); color: #fff; }
.btn--ghost { background: transparent; border-color: var(--brainee-color-border); color: var(--brainee-color-text); }
.btn--ghost:hover { border-color: var(--brainee-color-primary); color: var(--brainee-color-primary); }
.btn--block { width: 100%; }

/* =========================================================
   4. 页头
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--brainee-color-border);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.site-logo img { height: 40px; width: auto; }
.site-nav ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.site-nav a { font-weight: 600; color: var(--brainee-color-text); }
.site-nav a:hover { color: var(--brainee-color-primary); }
.site-header__cta { display: flex; align-items: center; gap: 14px; }
.site-nav-toggle { display: none; background: none; border: 0; font-size: 1.6rem; line-height: 1; cursor: pointer; color: var(--brainee-color-text); padding: 4px 8px; }

/* =========================================================
   5. Hero 部件
   ========================================================= */
.hero { position: relative; padding: 100px 0; background: var(--brainee-color-surface); overflow: hidden; }
.hero__inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero__title { margin-bottom: 18px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.hero__media img { border-radius: var(--brainee-radius); box-shadow: var(--brainee-shadow); }
.hero__pattern {
  position: absolute; inset: 0; z-index: 0; opacity: .5;
  background-image: radial-gradient(circle at 20% 20%, var(--brainee-color-primary) 0, transparent 38%),
                    radial-gradient(circle at 80% 60%, var(--brainee-color-accent) 0, transparent 36%);
  filter: blur(60px);
}
.hero .container { position: relative; z-index: 1; }

/* =========================================================
   6. 区块标题
   ========================================================= */
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }

/* =========================================================
   7. 产品网格 / 卡片
   ========================================================= */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--brainee-gap); }
.product-card {
  background: var(--brainee-color-bg); border: 1px solid var(--brainee-color-border);
  border-radius: var(--brainee-radius); overflow: hidden; transition: var(--brainee-transition);
  display: flex; flex-direction: column;
}
.product-card:hover { box-shadow: var(--brainee-shadow); transform: translateY(-4px); border-color: var(--brainee-color-primary); }
.product-card__media { aspect-ratio: 4 / 3; background: var(--brainee-color-surface); }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; }
.product-card__body { padding: 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-card__title { font-size: 1.1rem; margin: 0; }
.product-card__title a { color: inherit; }
.product-card__meta { font-size: .85rem; color: var(--brainee-color-muted); margin-top: auto; }

/* 筛选条 */
.product-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.product-filter__btn {
  border: 1px solid var(--brainee-color-border); background: var(--brainee-color-bg);
  border-radius: var(--brainee-btn-radius); padding: 8px 18px; font-weight: 600; cursor: pointer;
  transition: var(--brainee-transition);
}
.product-filter__btn:hover, .product-filter__btn.is-active {
  border-color: var(--brainee-color-primary); background: var(--brainee-color-primary); color: #fff;
}

/* =========================================================
   8. 文章列表
   ========================================================= */
.article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--brainee-gap); }
.article-card {
  display: flex; gap: 18px; padding: 18px; border: 1px solid var(--brainee-color-border);
  border-radius: var(--brainee-radius); background: var(--brainee-color-bg); transition: var(--brainee-transition);
}
.article-card:hover { box-shadow: var(--brainee-shadow); }
.article-card__thumb { width: 140px; flex: 0 0 140px; border-radius: var(--brainee-radius-sm); overflow: hidden; background: var(--brainee-color-surface); }
.article-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-card__title { font-size: 1.05rem; margin: 0 0 6px; }
.article-card__date { font-size: .8rem; color: var(--brainee-color-muted); }

/* =========================================================
   9. 表单（询价 / 联系）
   ========================================================= */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 4px; }
.field--full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .9rem; }
.field input, .field textarea, .field select {
  font-family: var(--brainee-font-base); font-size: .95rem; padding: 11px 14px;
  border: 1px solid var(--brainee-color-border); border-radius: var(--brainee-radius-sm);
  background: var(--brainee-color-bg); color: var(--brainee-color-text); transition: var(--brainee-transition);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brainee-color-primary); box-shadow: 0 0 0 3px rgba(31,111,235,.15);
}
.form-card { max-width: 720px; margin: 0 auto; background: var(--brainee-color-bg); border: 1px solid var(--brainee-color-border); border-radius: var(--brainee-radius); padding: 32px; box-shadow: var(--brainee-shadow-sm); }
.form-note { font-size: .85rem; color: var(--brainee-color-muted); margin-top: 14px; }

/* =========================================================
   10. CTA / 页脚
   ========================================================= */
.cta { background: linear-gradient(120deg, var(--brainee-color-primary), var(--brainee-color-primary-dark)); color: #fff; border-radius: var(--brainee-radius); padding: 48px; text-align: center; }
.cta h2 { color: #fff; }
.cta .lead { color: rgba(255,255,255,.85); }
.cta .btn--primary { background: #fff; color: var(--brainee-color-primary); }
.cta .btn--primary:hover { background: rgba(255,255,255,.9); }

.site-footer { background: #0f1722; color: #c7d0dc; padding: 56px 0 28px; margin-top: 0; }
.site-footer a { color: #c7d0dc; }
.site-footer a:hover { color: #fff; }
.site-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; font-family: var(--brainee-font-base); font-size: .95rem; letter-spacing: .04em; }
.site-footer__bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 36px; padding-top: 20px; font-size: .85rem; color: #8a97a8; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.contact-line { display: flex; gap: 8px; align-items: center; margin: 6px 0; font-size: .9rem; }
.contact-line .icon { width: 16px; height: 16px; flex: 0 0 16px; color: var(--brainee-color-primary); }
.contact-cta { margin-top: 40px; padding: 32px; background: var(--brainee-color-surface); border: 1px solid var(--brainee-color-border); border-radius: var(--brainee-radius); text-align: center; }
.contact-cta h2 { font-family: var(--brainee-font-heading); font-size: 1.4rem; margin-bottom: 8px; }
.contact-cta .btn--primary { margin-top: 18px; display: inline-block; }

/* =========================================================
   11. 响应式
   ========================================================= */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  :root { --brainee-section-y: 56px; }
  .product-grid, .article-list { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .article-card { flex-direction: column; }
  .article-card__thumb { width: 100%; flex-basis: auto; aspect-ratio: 16/9; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .site-nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--brainee-color-border); padding: 10px 20px; box-shadow: var(--brainee-shadow); }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: flex-start; gap: 4px; }
  .cta { padding: 32px 20px; }
}