/* ============================================================
   后台管理样式 —— 响应式
   ============================================================ */
:root {
    --c-primary: #8f1f1f;
    --c-primary-dark: #6e1616;
    --c-side: #23201d;
    --c-border: #e5e2dc;
    --c-bg: #f5f4f1;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px; color: #2b2b2b; background: var(--c-bg); line-height: 1.6;
}
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }

.admin-layout { display: flex; min-height: 100vh; }

/* 侧栏 */
.admin-side {
    width: 200px; flex-shrink: 0; background: var(--c-side); color: #cfc8c0;
    display: flex; flex-direction: column;
}
.admin-brand {
    padding: 20px 18px; font-size: 17px; font-weight: 700; color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, .08); letter-spacing: 2px;
}
.admin-side nav { display: flex; flex-direction: column; padding: 10px 0; }
.admin-side a { padding: 11px 20px; font-size: 14px; transition: background .2s; }
.admin-side a:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.admin-side a.active { background: var(--c-primary); color: #fff; }

/* 主区 */
.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
    background: #fff; padding: 12px 22px; display: flex; align-items: center; gap: 14px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, .05);
}
.admin-topbar span { flex: 1; }
.logout-btn { color: var(--c-primary); font-size: 14px; }
.logout-btn:hover { text-decoration: underline; }
.side-toggle { display: none; background: none; border: 1px solid var(--c-border); border-radius: 4px; padding: 4px 10px; font-size: 16px; cursor: pointer; }

.admin-content { padding: 22px; flex: 1; min-width: 0; }
.page-title { font-size: 20px; margin-bottom: 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* 提示 */
.notice { padding: 11px 16px; border-radius: 4px; margin-bottom: 16px; font-size: 14px; }
.notice.ok { background: #eef7ee; color: #2e7d32; border: 1px solid #bfe3c0; }
.notice.err { background: #fdecec; color: #c62828; border: 1px solid #f3c1c1; }

/* 统计卡片 */
.stat-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 22px; }
.stat-card {
    background: #fff; border-radius: 8px; padding: 18px; text-align: center;
    box-shadow: 0 1px 6px rgba(0, 0, 0, .04); transition: transform .2s;
}
.stat-card:hover { transform: translateY(-3px); }
.stat-card strong { display: block; font-size: 28px; color: var(--c-primary); }
.stat-card.warn strong { color: #d84315; }
.stat-card span { color: #888; font-size: 13px; }

.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.panel { background: #fff; border-radius: 8px; padding: 18px; box-shadow: 0 1px 6px rgba(0, 0, 0, .04); min-width: 0; }
.panel h3 { font-size: 15px; margin-bottom: 12px; padding-left: 10px; border-left: 4px solid var(--c-primary); }

/* 表格 */
.tbl { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; box-shadow: 0 1px 6px rgba(0, 0, 0, .04); }
.tbl th, .tbl td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--c-border); font-size: 13px; vertical-align: middle; }
.tbl th { background: #faf8f5; font-weight: 600; white-space: nowrap; }
.tbl tr:hover td { background: #fbf9f6; }
.tbl .ellipsis { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tbl .empty { text-align: center; color: #999; padding: 30px; }
.c-warn { color: #d84315; }
.row-unread td { background: #fffaf2; }
.thumb { width: 46px; height: 34px; object-fit: cover; border-radius: 4px; display: inline-block; vertical-align: middle; }
.thumb.preview { width: 180px; height: auto; margin-bottom: 12px; display: block; }

.op { color: #1565c0; margin-right: 6px; white-space: nowrap; }
.op:hover { text-decoration: underline; }
.op.del { color: #c62828; }

/* 表单 */
.form { background: #fff; border-radius: 8px; padding: 24px; box-shadow: 0 1px 6px rgba(0, 0, 0, .04); max-width: 760px; }
.form.narrow { max-width: 440px; }
.form label { display: block; font-size: 14px; margin-bottom: 16px; font-weight: 500; }
.form input[type="text"], .form input[type="password"], .form input[type="number"],
.form input[type="tel"], .form input[type="email"], .form input[type="datetime-local"],
.form select, .form textarea, .form input[type="file"] {
    width: 100%; margin-top: 6px; border: 1px solid var(--c-border); border-radius: 4px;
    padding: 10px 12px; font-size: 14px; font-family: inherit; outline: none; background: #fff;
}
.form textarea.rich { font-family: Consolas, "Courier New", monospace; font-size: 13px; line-height: 1.7; }
.form input:focus, .form textarea:focus, .form select:focus { border-color: var(--c-primary); }
.form .checkbox { display: flex; align-items: center; gap: 8px; }
.form .checkbox input { width: auto; margin: 0; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.inline-form {
    background: #fff; border-radius: 8px; padding: 14px 16px; margin-bottom: 16px;
    display: flex; gap: 10px; flex-wrap: wrap; box-shadow: 0 1px 6px rgba(0, 0, 0, .04);
}
.inline-form input {
    border: 1px solid var(--c-border); border-radius: 4px; padding: 8px 12px; font-size: 13px; outline: none;
}

/* 按钮 */
.btn {
    display: inline-block; padding: 10px 24px; border: none; cursor: pointer;
    border-radius: 4px; font-size: 14px; transition: all .2s; text-align: center;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); }
.btn-outline { border: 1px solid var(--c-border); color: #666; background: #fff; }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-block { width: 100%; }

/* 分类栏 / 分页 */
.cate-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.cate-bar a { padding: 6px 16px; border-radius: 999px; background: #fff; border: 1px solid var(--c-border); font-size: 13px; }
.cate-bar a.active, .cate-bar a:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.pagination { display: flex; gap: 8px; justify-content: center; margin: 18px 0; flex-wrap: wrap; }
.pagination a, .pagination .current {
    min-width: 34px; padding: 6px 10px; text-align: center; background: #fff;
    border: 1px solid var(--c-border); border-radius: 4px; font-size: 13px;
}
.pagination .current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* 登录页 */
.login-body {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #2a2320 0%, #4a2622 100%); padding: 16px;
}
.login-box {
    width: 100%; max-width: 380px; background: #fff; border-radius: 10px;
    padding: 34px 30px; box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
}
.login-box h2 { text-align: center; font-size: 21px; margin-bottom: 4px; }
.login-sub { text-align: center; color: #999; margin-bottom: 22px; font-size: 13px; }
.login-box label { display: block; margin-bottom: 16px; font-size: 14px; }
.login-box input {
    width: 100%; margin-top: 6px; border: 1px solid var(--c-border);
    border-radius: 4px; padding: 11px 12px; font-size: 14px; outline: none;
}
.login-box input:focus { border-color: var(--c-primary); }
.login-tip { text-align: center; color: #b0a89f; font-size: 12px; margin-top: 14px; }

/* ============================================================
   后台响应式
   ============================================================ */
@media (max-width: 991px) {
    .stat-cards { grid-template-columns: repeat(3, 1fr); }
    .panel-grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
    .side-toggle { display: block; }
    .admin-side {
        position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
        transform: translateX(-100%); transition: transform .25s; box-shadow: 4px 0 16px rgba(0,0,0,.2);
    }
    .admin-side.open { transform: translateX(0); }
    .admin-content { padding: 14px; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .admin-content { overflow-x: auto; }   /* 宽表格横向滚动，不撑破布局 */
    .tbl { min-width: 640px; }
    .tbl .ellipsis { max-width: 160px; }
}

@media (max-width: 480px) {
    .stat-cards { gap: 10px; }
    .stat-card strong { font-size: 22px; }
    .inline-form input { flex: 1 1 100%; }
}