:root {
  /* 明确声明本站只支持浅色：阻止手机浏览器（系统深色模式）自动反色/压暗页面与表单控件 */
  color-scheme: light;
  --primary: #FF6900;        /* 小米橙 */
  --primary-dark: #E85D00;
  --soft: #FFF4EC;           /* 浅橙底（hover / 选中） */
  --text: #000000;           /* 纯黑文本 */
  --muted: #4B5563;
  --border: #E5E7EB;
  --bg: #FFFFFF;             /* 页面纯白 */
  --card: #FFFFFF;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

/* 顶部栏 */
.site-header {
  background: linear-gradient(135deg, #FF8A3D 0%, #FF6900 62%, #F25C00 100%);
  color: #fff;
}
.site-header .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header .logo { color: #fff; font-weight: 700; font-size: 18px; }
.site-header .logo:hover { text-decoration: none; }
.site-header .top-links a { color: #FFE9D6; margin-left: 18px; font-size: 14px; }

.container { max-width: 1100px; margin: 0 auto; padding: 22px 20px 60px; }

.page-title { font-size: 24px; margin: 6px 0 18px; }

/* 页签 */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.tab { position: relative; }
.tab-title {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}
.tab.active .tab-title { background: var(--primary); color: #fff; border-color: var(--primary); }
.tab-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 20;
  min-width: 200px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  padding: 6px;
  display: none;
}
.tab:hover .tab-menu,
.tab.open .tab-menu { display: block; }
.tab-menu a { display: block; padding: 7px 10px; border-radius: 6px; color: var(--text); font-size: 14px; }
.tab-menu a:hover { background: var(--soft); text-decoration: none; }
.tab-menu a.active { background: var(--soft); color: var(--primary-dark); font-weight: 600; }

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}

/* 生成器两栏 */
.generator { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.pane-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }

#input {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  /* 显式指定底色与文字色，避免被浏览器深色模式改写 */
  background: #fff;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
}
#input:focus { outline: 2px solid #FFD2A8; border-color: var(--primary); }

.input-actions { display: flex; gap: 8px; margin: 10px 0; }
.hint { font-size: 12.5px; color: var(--muted); margin: 8px 0 0; }
kbd { background: var(--soft); border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; font-size: 12px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: var(--soft); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { font-size: 13px; padding: 6px 12px; }
.chev { font-size: 11px; }

/* 输出 */
.output-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.download-wrap { position: relative; }
.download-menu {
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 4px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  padding: 6px;
  min-width: 110px;
  display: none;
  z-index: 30;
}
.download-menu.open { display: block; }
.download-menu button { display: block; width: 100%; text-align: left; padding: 8px 12px; border: 0; background: none; border-radius: 6px; cursor: pointer; font-size: 14px; font-family: inherit; }
.download-menu button:hover { background: var(--soft); }

.output {
  min-height: 240px;
  max-height: 520px;
  overflow: auto;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-content: flex-start;
  justify-content: center;
  background: #fff;
}
.output .item { text-align: center; }
.output .item svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  /* 保持条码纯黑，禁止浏览器强制配色/深色模式改写线条颜色 */
  forced-color-adjust: none;
}
.output .item .err { color: #dc2626; font-size: 12px; max-width: 220px; }
.output .empty { color: var(--muted); font-size: 14px; align-self: center; }

.output-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* 选项 */
.options-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.opt label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.opt input[type="number"], .opt select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.opt input[type="checkbox"] { width: 20px; height: 20px; margin-top: 4px; accent-color: var(--primary); }

/* 类型列表 */
.type-list h2 { font-size: 20px; margin: 30px 0 14px; }
.type-group { margin-bottom: 18px; }
.type-group h3 { font-size: 15px; margin: 0 0 8px; color: var(--muted); }
.type-group ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.type-group li a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 13.5px;
  color: var(--text);
}
.type-group li a:hover { border-color: var(--primary); text-decoration: none; }
.type-group li a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* FAQ */
.faq h2 { font-size: 20px; margin: 30px 0 14px; }
.faq details { background: #fff; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; padding: 10px 14px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 14.5px; }
.faq details p, .faq details ul { margin: 10px 0 4px; color: var(--text); font-size: 14px; }

/* 页脚 */
.site-footer { background: #fff; border-top: 1px solid var(--border); color: var(--muted); margin-top: 30px; }
.site-footer .inner { max-width: 1100px; margin: 0 auto; padding: 28px 20px; }
.site-footer .brand { color: var(--text); font-weight: 700; margin-bottom: 6px; }
.site-footer .desc { font-size: 13px; margin: 0 0 12px; }
.site-footer .footer-links a { color: var(--primary); margin-right: 16px; font-size: 13px; }
.site-footer .copyright { font-size: 12px; margin: 14px 0 0; color: var(--muted); }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 100;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
}

@media (max-width: 820px) {
  /* 竖屏：生成器两栏变单栏，并按手机端收紧间距 */
  .container { padding: 16px 14px 40px; }
  .page-title { font-size: 20px; margin: 2px 0 14px; }
  .generator { grid-template-columns: 1fr; gap: 14px; }
  .tabs { gap: 6px; margin-bottom: 14px; }
  .tab-title { padding: 6px 12px; font-size: 13.5px; }
  .tab-menu { max-width: 78vw; }
  .card { padding: 14px; }
  #input { min-height: 160px; }
  .output { min-height: 200px; max-height: 420px; }
  .options-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
  .output-actions .btn { flex: 1 1 auto; justify-content: center; }
}

/* 打印标签：只输出条码区域 */
@media print {
  .site-header, .tabs, .options, .type-list, .faq, .site-footer,
  .input-actions, .output-actions, .download-wrap, .hint { display: none !important; }
  .container { max-width: none; padding: 0; }
  .generator { grid-template-columns: 1fr; border: 0; padding: 0; }
  .input-pane { display: none; }
  .output { border: 0; background: #fff; max-height: none; }
}