/*
 Theme Name: Nine Billion Bag
 Theme URI: https://www.ninebillionbag.com
 Description: 极简轻奢风格企业官网主题 —— 木质/暖米色主色调，含产品自定义文章类型与联系表单。
 Version: 1.0.0
 Author: WorkBuddy
 License: MIT
 Text Domain: nbb
*/

:root {
  --cream: #FBF7F0;
  --beige: #F1E7D8;
  --beige-2: #E9DCC8;
  --wood: #A9744F;
  --wood-dark: #8B5E3C;
  --ink: #2E2A26;
  --muted: #8A7E72;
  --line: #E4D8C7;
  --white: #FFFFFF;
  --serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans: "Jost", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --maxw: 1200px;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 300;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 .5em;
  letter-spacing: .01em;
}

a { color: var(--wood-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--wood); }

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid var(--wood-dark);
  background: var(--wood-dark);
  color: var(--cream);
  cursor: pointer;
  transition: all .25s;
}
.btn:hover { background: transparent; color: var(--wood-dark); }
.btn-ghost { background: transparent; color: var(--wood-dark); }
.btn-ghost:hover { background: var(--wood-dark); color: var(--cream); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,247,240,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 74px;
}
.brand { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: .02em; color: var(--ink); }
.brand small { display:block; font-family: var(--sans); font-size: 10px; letter-spacing: .28em; color: var(--muted); text-transform: uppercase; font-weight: 400; }
.nav-menu { display: flex; gap: 34px; list-style: none; margin: 0; padding: 0; }
.nav-menu a { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink); }
.nav-menu a:hover { color: var(--wood); }
.nav-toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 120px 0 100px;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(169,116,79,.10), transparent 60%),
    linear-gradient(180deg, var(--cream), var(--beige));
}
.hero h1 { font-size: clamp(40px, 6vw, 76px); margin-bottom: .3em; }
.hero p { font-size: 18px; color: var(--muted); max-width: 560px; margin: 0 0 32px; }
.hero .eyebrow { font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: var(--wood); margin-bottom: 18px; }

/* ---------- 区块 ---------- */
section.block { padding: 90px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-head .eyebrow { font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: var(--wood); }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); }
.section-head p { color: var(--muted); }

/* ---------- 产品网格 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px; }
.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(139,94,60,.12); }
.product-thumb { aspect-ratio: 4/3; background: linear-gradient(135deg, var(--beige), var(--beige-2)); display:flex; align-items:center; justify-content:center; color: var(--wood); font-family: var(--serif); font-size: 40px; }
.product-body { padding: 22px 24px 26px; }
.product-body h3 { font-size: 22px; margin-bottom: 8px; }
.product-meta { font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 12px; }
.product-meta b { color: var(--ink); font-weight: 500; }
.cat-pills { display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-bottom: 40px; }
.cat-pill { padding: 8px 20px; border:1px solid var(--line); border-radius: 999px; font-size:13px; letter-spacing:.08em; color: var(--ink); }
.cat-pill:hover { border-color: var(--wood); color: var(--wood-dark); }

/* ---------- 两张图带 ---------- */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:center; }
.split .visual { aspect-ratio: 4/3; border-radius: var(--radius); background: linear-gradient(135deg, var(--wood), var(--wood-dark)); }

/* ---------- 表单 ---------- */
.form-row { margin-bottom: 18px; }
.form-row label { display:block; font-size: 12px; letter-spacing:.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 13px 16px; border:1px solid var(--line); border-radius: 10px;
  font-family: var(--sans); font-size: 15px; background: var(--white); color: var(--ink);
}
.form-row input:focus, .form-row textarea:focus { outline: none; border-color: var(--wood); }
.form-note { font-size: 13px; color: var(--muted); }
.form-ok { background: #eaf3ea; border:1px solid #bcdcbc; color:#2f5d2f; padding: 14px 18px; border-radius: 10px; margin-bottom: 20px; }
.form-err { background: #fbeaea; border:1px solid #e7bcbc; color:#7a2f2f; padding: 14px 18px; border-radius: 10px; margin-bottom: 20px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: #d9cfc2; padding: 64px 0 30px; margin-top: 40px; }
.site-footer h3 { color: var(--cream); }
.site-footer a { color: #d9cfc2; }
.site-footer a:hover { color: var(--wood); }
.footer-grid { display:grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-grid p { color:#b7ac9e; font-size: 14px; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.08); margin-top: 40px; padding-top: 20px; font-size: 12px; color:#9a8f80; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }

/* ---------- 文章/详情 ---------- */
.single-product .product-hero { display:grid; grid-template-columns: 1fr 1fr; gap:50px; padding: 60px 0; }
.meta-table { width:100%; border-collapse: collapse; margin-top: 18px; }
.meta-table td { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.meta-table td:first-child { color: var(--muted); width: 40%; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
.star { color: var(--wood); }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .nav-menu { display:none; position:absolute; top:74px; left:0; right:0; background: var(--cream); flex-direction:column; gap:0; border-bottom:1px solid var(--line); padding: 10px 0; }
  .nav-menu.open { display:flex; }
  .nav-menu li { padding: 12px 24px; }
  .nav-toggle { display:block; }
  .split, .single-product .product-hero { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}