/* =========================================================================
   商品监控后台 · 全局样式
   结构：1) 设计变量  2) 基础重置  3) 登录页布局  4) 表单组件  5) 响应式
   说明：使用系统字体栈（零外部字体请求）、CSS 变量便于统一换肤。
   ========================================================================= */

/* 1) 设计变量 ------------------------------------------------------------ */
:root {
  --c-bg: #f6f8fb;
  --c-surface: #ffffff;
  --c-surface-2: #f2f5f9;
  --c-border: #e5e9f0;
  --c-text: #1a2233;
  --c-text-muted: #6b7688;
  --c-text-faint: #9aa4b2;

  --c-primary: #4f6ef7;
  --c-primary-hover: #3f5ce0;
  --c-primary-soft: #eef1fe;
  --c-danger: #e5484d;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.04);
  --shadow-md: 0 8px 24px rgba(17, 24, 39, 0.06);
  --shadow-lg: 0 24px 60px rgba(31, 45, 90, 0.10);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --ring: 0 0 0 3px rgba(79, 110, 247, 0.18);
  --transition: 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 2) 基础重置 ------------------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button, input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

/* 3) 登录页布局（居中单卡片） ------------------------------------------- */
.auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-6);
}
.auth__panel {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.auth__card {
  width: 100%;
  max-width: 400px;
  padding: var(--space-7) var(--space-6);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.auth__header { margin-bottom: var(--space-6); text-align: center; }
.auth__logo--mobile { display: block; margin: 0 auto var(--space-4); }
.auth__title { margin: 0 0 var(--space-2); font-size: 1.6rem; font-weight: 700; }
.auth__subtitle { margin: 0; color: var(--c-text-muted); }

/* 4) 表单组件 ------------------------------------------------------------ */
.form { display: grid; gap: var(--space-4); }

.field { display: grid; gap: var(--space-2); }
.field__label { font-size: 0.85rem; font-weight: 600; color: var(--c-text); }
.field__control { position: relative; display: flex; align-items: center; }
.field__icon {
  position: absolute;
  left: 12px;
  color: var(--c-text-faint);
  pointer-events: none;
}
.field__input {
  width: 100%;
  padding: 12px 14px 12px 40px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field__input::placeholder { color: var(--c-text-faint); }
/* 隐藏 Edge/IE 密码框自带的"显示密码/清除"按钮，避免与自定义眼睛重叠 */
.field__input::-ms-reveal,
.field__input::-ms-clear { display: none; width: 0; height: 0; }
.field__input:hover { border-color: #d4dae4; }
.field__input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: var(--ring);
}
.field__toggle {
  position: absolute;
  right: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 0;
  background: transparent;
  color: var(--c-text-faint);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.field__toggle:hover { color: var(--c-text-muted); background: var(--c-surface-2); }
.field__toggle:focus-visible { outline: none; box-shadow: var(--ring); }
/* 单个眼睛图标：默认不显示斜杠，点击显示密码后（.is-visible）出现斜杠 */
.field__toggle .eye-slash { display: none; }
.field__toggle.is-visible .eye-slash { display: inline; }

.field__error { margin: 0; min-height: 1em; font-size: 0.78rem; color: var(--c-danger); }
.field--invalid .field__input { border-color: var(--c-danger); }
.field--invalid .field__input:focus { box-shadow: 0 0 0 3px rgba(229, 72, 77, 0.16); }

/* 控制台信息块 */
.info {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
}
.info__row { display: flex; justify-content: space-between; gap: var(--space-3); font-size: 0.9rem; }
.info__key { color: var(--c-text-muted); }
.info__val { color: var(--c-text); font-weight: 500; word-break: break-all; text-align: right; }

/* 按钮 */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: 12px 18px;
  border: 0;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--c-primary-hover); }
.btn--primary:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn[disabled] { opacity: 0.7; cursor: not-allowed; }

.btn__spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn.is-loading .btn__spinner { display: inline-block; }
.btn.is-loading .btn__label { opacity: 0.85; }

@keyframes spin { to { transform: rotate(360deg); } }

/* 5) 响应式 -------------------------------------------------------------- */
/* 手机：更紧凑 */
@media (max-width: 480px) {
  body { font-size: 14px; }
  .auth { padding: var(--space-4) var(--space-3); }
  .auth__card { padding: var(--space-6) var(--space-5); box-shadow: var(--shadow-md); }
  .auth__title { font-size: 1.4rem; }
}

/* 尊重用户的减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* =========================================================================
   6) 管理后台外壳（侧栏 + 顶栏 + 内容区），沿用登录页浅色简约风
   ========================================================================= */
:root { --sidebar-w: 248px; }

.app { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; min-height: 100dvh; }

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
  z-index: 20;
}
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 20px;
  font-size: 1.02rem;
  font-weight: 700;
  border-bottom: 1px solid var(--c-border);
}
.nav { flex: 1; display: flex; flex-direction: column; gap: 4px; padding: 14px 12px; }
.nav__item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 11px 14px;
  border: 0;
  background: transparent;
  color: var(--c-text-muted);
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}
.nav__item svg { flex: none; color: var(--c-text-faint); transition: color var(--transition); }
.nav__item:hover { background: var(--c-surface-2); color: var(--c-text); }
.nav__item.is-active { background: var(--c-primary-soft); color: var(--c-primary); }
.nav__item.is-active svg { color: var(--c-primary); }
.sidebar__footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--c-border);
  font-size: 0.8rem;
  color: var(--c-text-faint);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15); }

/* 移动端遮罩 */
.backdrop { position: fixed; inset: 0; background: rgba(17, 24, 39, 0.35); z-index: 15; }

/* 主区域 */
.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 60px;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.topbar__menu {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 0;
  background: transparent;
  color: var(--c-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.topbar__menu:hover { background: var(--c-surface-2); }
.topbar__title { flex: 1; margin: 0; font-size: 1.1rem; font-weight: 700; }
.topbar__right { display: flex; align-items: center; gap: 14px; }
.topbar__user { font-size: 0.9rem; color: var(--c-text-muted); }

.content { padding: 24px; width: 100%; }

/* 视图切换 */
.view { display: none; }
.view.is-active { display: block; animation: viewIn 0.2s ease; }
@keyframes viewIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.view__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.view__title { margin: 0; font-size: 1.25rem; font-weight: 700; }
.view__desc { margin: 4px 0 0; font-size: 0.9rem; color: var(--c-text-muted); }
.view__actions { display: flex; gap: 10px; flex: none; }

/* 卡片 */
.card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; }
.card + .card { margin-top: 16px; }
.card__head { padding: 14px 20px; border-bottom: 1px solid var(--c-border); font-weight: 600; font-size: 0.95rem; }
.card__body { padding: 20px; }

/* 工具栏与表单控件 */
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.toolbar .spacer { flex: 1; }
.control {
  padding: 9px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-surface);
  color: var(--c-text);
  min-width: 160px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.control:focus { outline: none; border-color: var(--c-primary); box-shadow: var(--ring); }
.control:disabled { background: var(--c-surface-2); color: var(--c-text-faint); cursor: not-allowed; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.form-grid .control { width: 100%; min-width: 0; }

/* 按钮变体 */
.btn--ghost { width: auto; background: var(--c-surface); border: 1px solid var(--c-border); color: var(--c-text); box-shadow: none; }
.btn--ghost:hover { background: var(--c-surface-2); }
.btn--sm { width: auto; padding: 8px 14px; font-size: 0.85rem; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* 徽标 */
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge--muted { background: var(--c-surface-2); color: var(--c-text-muted); }
.badge--ok { background: #e7f7ee; color: #12855a; }
.badge--warn { background: #fdf0e6; color: #b25b00; }
.badge--err { background: #fdecec; color: #c0353a; }

/* 表格 */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td { padding: 12px 16px; text-align: left; }
.table thead th { background: var(--c-surface-2); color: var(--c-text-muted); font-weight: 600; font-size: 0.8rem; border-bottom: 1px solid var(--c-border); }
.table tbody td { border-bottom: 1px solid var(--c-border); }
.table tbody tr:last-child td { border-bottom: 0; }

/* 空状态 */
.empty { padding: 44px 20px; text-align: center; color: var(--c-text-faint); }
.empty svg { display: block; margin: 0 auto 12px; color: #cbd3df; }
.empty p { margin: 0; font-size: 0.9rem; }

/* 关键词筛选：小号胶囊勾选框（不勾选 = 显示全部） */
.choice-group--kw { align-items: center; gap: 10px; }
.choice--sm { padding: 8px 14px; border-radius: 999px; }
.choice--sm .choice__label { font-size: 0.85rem; font-weight: 600; }
.filter-count { font-size: 0.82rem; color: var(--c-text-muted); white-space: nowrap; }

/* 监控操作栏：吸顶（顶栏高 60px，留 12px 间距） */
.card--sticky { position: sticky; top: 72px; z-index: 9; }
.monbar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.monbar .choice-group--kw { flex: 1 1 auto; min-width: 0; }
.monbar__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-left: auto; }

/* 分段按钮（正序/倒序） */
.seg { display: inline-flex; border: 1px solid var(--c-border); border-radius: var(--radius-sm); overflow: hidden; }
.seg__btn {
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 0;
  background: var(--c-surface);
  color: var(--c-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.seg__btn + .seg__btn { border-left: 1px solid var(--c-border); }
.seg__btn:hover { color: var(--c-primary); }
.seg__btn.is-active { background: var(--c-primary); color: #fff; }

/* 监控商品网格：宽屏一行 8 个，窄屏逐级递减 */
.pgrid { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 1280px) { .pgrid { grid-template-columns: repeat(6, minmax(0, 1fr)); } }
@media (max-width: 1000px) { .pgrid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 640px)  { .pgrid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 480px)  { .pgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* 商品卡片 */
.pcard {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--c-surface);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.pcard:hover { border-color: #d4dae4; box-shadow: var(--shadow-sm); }
.pcard.is-new { animation: pcardIn 0.5s ease; border-color: var(--c-primary); }
@keyframes pcardIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: none; } }
.pcard__img { display: block; aspect-ratio: 1 / 1; background: linear-gradient(135deg, #eef1f6, #e6eaf1); }
.pcard__img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.pcard__info { display: flex; flex-direction: column; gap: 6px; padding: 10px; flex: 1; }
.pcard__name {
  font-size: 0.76rem;
  line-height: 1.4;
  color: var(--c-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.pcard__price { font-size: 0.86rem; font-weight: 700; color: var(--c-primary); }
.pcard__acts { display: grid; gap: 6px; margin-top: auto; }
.pbtn {
  display: block;
  width: 100%;
  padding: 6px 0;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-text);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.pbtn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pbtn--buy { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.pbtn--buy:hover { background: var(--c-primary-hover, #3557d6); color: #fff; }
.pbtn:disabled { opacity: 0.55; cursor: not-allowed; }

/* 订单网格：宽屏一行 4 条，窄屏逐级递减 */
.ogrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 1200px) { .ogrid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 900px)  { .ogrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px)  { .ogrid { grid-template-columns: 1fr; } }

/* 订单卡片（紧凑横排：小缩略图 + 信息） */
.ocard {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-surface);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.ocard:hover { border-color: #d4dae4; box-shadow: var(--shadow-sm); }
.ocard__head { display: flex; gap: 10px; align-items: flex-start; }
.ocard__thumb {
  width: 64px;
  height: 64px;
  flex: none;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: linear-gradient(135deg, #eef1f6, #e6eaf1);
}
.ocard__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ocard__headinfo { flex: 1; min-width: 0; }
.ocard__name {
  font-size: 0.76rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ocard__pricerow { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; }
.ocard__price { font-size: 0.88rem; font-weight: 700; color: var(--c-primary); }
.ocard__meta { display: grid; gap: 3px; padding-top: 8px; border-top: 1px dashed var(--c-border); font-size: 0.74rem; color: var(--c-text-muted); }
.ocard__meta .row { display: flex; justify-content: space-between; gap: 10px; }
.ocard__meta .row b { color: var(--c-text); font-weight: 600; text-align: right; word-break: break-all; }
.ocard__err { font-size: 0.74rem; color: var(--c-danger); }

/* 设置行 */
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--c-border); }
.setting-row__title { font-weight: 600; font-size: 0.92rem; }
.setting-row__desc { margin-top: 2px; font-size: 0.82rem; color: var(--c-text-muted); }

/* 后台响应式：窄屏侧栏抽屉化 */
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 0; width: var(--sidebar-w); transform: translateX(-100%); transition: transform 0.22s ease; }
  .sidebar.is-open { transform: none; box-shadow: var(--shadow-lg); }
  .topbar__menu { display: inline-flex; }
}
@media (min-width: 861px) {
  .backdrop { display: none; }
}

/* =========================================================================
   7) 模态框 + 轻提示
   ========================================================================= */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.modal__backdrop { position: absolute; inset: 0; background: rgba(17, 24, 39, 0.42); animation: fadeIn 0.15s ease; }
.modal__dialog {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  animation: modalIn 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal__title { margin: 0 0 var(--space-2); font-size: 1.15rem; font-weight: 700; }
.modal__msg { margin: 0 0 var(--space-5); color: var(--c-text-muted); font-size: 0.92rem; }
.modal__actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: var(--space-5); }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }

/* 危险操作按钮 */
.btn--danger { background: var(--c-danger); color: #fff; box-shadow: none; }
.btn--danger:hover { background: #d13b40; }

/* 状态圆点小字 */
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; }
.status__dot { width: 8px; height: 8px; border-radius: 50%; }
.status--ok .status__dot { background: #22c55e; }
.status--bad .status__dot { background: var(--c-danger); }
.status--ok { color: #12855a; }
.status--bad { color: var(--c-danger); }

/* 行内操作按钮：小号描边按钮，左对齐（贴着表头） */
.row-actions { display: flex; gap: 8px; justify-content: flex-start; align-items: center; }
.link-btn {
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-primary);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.link-btn:hover { background: var(--c-primary-soft); border-color: var(--c-primary); }
.link-btn--danger { color: var(--c-danger); }
.link-btn--danger:hover { background: rgba(229, 72, 77, 0.08); border-color: var(--c-danger); }
.link-btn:disabled { opacity: 0.5; cursor: not-allowed; background: var(--c-surface); border-color: var(--c-border); }

/* 多选便利店：卡片式复选项 */
.choice-group { display: flex; flex-wrap: wrap; gap: 12px; }
.choice {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-surface);
  cursor: pointer;
  user-select: none;
  transition: border-color var(--transition), background var(--transition);
}
.choice:hover { border-color: #d4dae4; }
.choice input { position: absolute; opacity: 0; width: 0; height: 0; }
.choice__box {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: var(--c-surface);
  transition: background var(--transition), border-color var(--transition);
}
.choice__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: transform var(--transition);
}
.choice__label { font-size: 0.92rem; }
.choice input:checked + .choice__box { background: var(--c-primary); border-color: var(--c-primary); }
.choice input:checked + .choice__box::after { transform: rotate(45deg) scale(1); }
.choice:has(input:checked) { border-color: var(--c-primary); background: var(--c-primary-soft); }
.choice input:focus-visible + .choice__box { box-shadow: var(--ring); }

/* 轻提示 toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(10px);
  z-index: 60;
  max-width: 90vw;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: #1a2233;
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast--ok { background: #12855a; }
.toast--err { background: var(--c-danger); }