/* ===================== 后台管理页样式 ===================== */
.admin-wrap { max-width: 1120px; margin: 0 auto; padding: 32px 20px 64px; }
.admin-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.admin-head h1 { font-size: 22px; color: #0f1b2d; margin: 0; }
.admin-head .sub { color: #6b7891; font-size: 13px; }
.admin-nav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.admin-nav button { border: 1px solid #d7deea; background: #fff; color: #2b3a52; padding: 8px 16px; border-radius: 10px; cursor: pointer; font-size: 14px; }
.admin-nav button.active { background: #2f7bff; border-color: #2f7bff; color: #fff; }
.admin-card { background: #fff; border: 1px solid #e7ecf5; border-radius: 14px; padding: 20px; box-shadow: 0 6px 20px rgba(18,42,89,.05); margin-bottom: 22px; }
.admin-card h2 { font-size: 17px; margin: 0 0 14px; color: #0f1b2d; }

/* 统计卡 */
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat-box { background: linear-gradient(135deg, #2f7bff, #1f5fe0); color: #fff; border-radius: 14px; padding: 18px; }
.stat-box .n { font-size: 30px; font-weight: 800; }
.stat-box .l { font-size: 13px; opacity: .92; margin-top: 4px; }

/* 表格 */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #eef2f8; vertical-align: top; }
.tbl th { color: #6b7891; font-weight: 600; background: #f7f9fc; }
.tbl tr:hover td { background: #fafcff; }
.tbl .thumb { width: 56px; height: 56px; object-fit: contain; border: 1px solid #eef2f8; border-radius: 8px; background: #fff; }
.tbl .msg-cell { max-width: 360px; white-space: pre-wrap; color: #34465f; }
.tag-pill { display: inline-block; padding: 2px 8px; border-radius: 999px; background: #eaf1ff; color: #2f7bff; font-size: 12px; }
.btn-sm { border: 1px solid #d7deea; background: #fff; border-radius: 8px; padding: 5px 12px; cursor: pointer; font-size: 13px; color: #2b3a52; }
.btn-sm.danger { color: #e23b53; border-color: #f3c2cb; }
.btn-sm.primary { background: #2f7bff; border-color: #2f7bff; color: #fff; }
.btn-sm:hover { filter: brightness(.97); }

/* 表单 / 弹窗 */
.modal-mask { position: fixed; inset: 0; background: rgba(15,27,45,.45); display: none; align-items: flex-start; justify-content: center; overflow: auto; z-index: 50; padding: 40px 16px; }
.modal-mask.show { display: flex; }
.modal { background: #fff; width: 100%; max-width: 620px; border-radius: 16px; padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal h3 { margin: 0 0 16px; color: #0f1b2d; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 13px; color: #51607a; margin-bottom: 5px; }
.field input, .field textarea, .field select {
  width: 100%; box-sizing: border-box; border: 1px solid #d7deea; border-radius: 9px; padding: 9px 11px; font-size: 14px; color: #1c2a3f; background: #fff;
}
.field textarea { min-height: 74px; resize: vertical; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.img-prev { width: 96px; height: 96px; object-fit: contain; border: 1px dashed #cfd8e8; border-radius: 10px; background: #fafcff; margin-top: 8px; }
.spec-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.mini-note { font-size: 12px; color: #8a96ab; margin-top: 8px; }
.admin-empty { color: #8a96ab; padding: 18px 0; text-align: center; }
.login-box { max-width: 380px; margin: 8vh auto 0; background: #fff; border: 1px solid #e7ecf5; border-radius: 16px; padding: 30px; box-shadow: 0 10px 30px rgba(18,42,89,.08); }
.login-box h1 { text-align: center; color: #0f1b2d; }
.login-box .brand { text-align: center; color: #6b7891; font-size: 13px; margin-bottom: 18px; }
.err { color: #e23b53; font-size: 13px; min-height: 18px; margin-top: 6px; }
@media (max-width: 640px) { .form-grid, .stat-grid { grid-template-columns: 1fr; } .tbl { font-size: 13px; } }