/* ===== 一七九九网络 后台管理系统 样式 =====
   主色 #3370ff，与主站一致；系统字体栈 */

:root{
    --admin-bg:#f4f6fb;
    --admin-panel:#ffffff;
    --admin-border:#e7eefb;
    --admin-primary:#3370ff;
    --admin-primary-deep:#1c5ee9;
    --admin-primary-soft:#edf4ff;
    --admin-text:#1a2b4a;
    --admin-muted:#7f8da9;
    --admin-success:#22c55e;
    --admin-warning:#f59e0b;
    --admin-danger:#ef4444;
    --admin-shadow:0 2px 12px rgba(54,93,180,.08);
    --admin-radius:12px;
}

*{box-sizing:border-box;}
html,body{
    margin:0;
    padding:0;
    font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
    color:var(--admin-text);
    background:var(--admin-bg);
    font-size:14px;
    -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:var(--admin-primary);}
a:hover{opacity:.85;}
h1,h2,h3,h4{margin:0;font-weight:600;}
ul{margin:0;padding:0;list-style:none;}

/* ===== 布局骨架 ===== */
.admin-shell{display:flex;min-height:100vh;}

/* 侧边栏 */
.admin-sidebar{
    width:232px;
    background:#fff;
    border-right:1px solid var(--admin-border);
    display:flex;
    flex-direction:column;
    position:fixed;
    top:0;left:0;bottom:0;
    z-index:100;
    transition:transform .25s ease;
}
.admin-brand{
    display:flex;align-items:center;gap:10px;
    height:64px;padding:0 20px;
    border-bottom:1px solid var(--admin-border);
}
.admin-brand img{height:32px;width:auto;}
.admin-brand .brand-name{font-size:16px;font-weight:700;color:var(--admin-text);}
.admin-brand .brand-sub{font-size:11px;color:var(--admin-muted);}

.admin-menu{flex:1;padding:16px 12px;overflow-y:auto;}
.admin-menu-group-title{
    font-size:12px;color:var(--admin-muted);
    padding:8px 12px;margin-top:8px;
    letter-spacing:.5px;
}
.admin-menu-item{
    display:flex;align-items:center;gap:10px;
    padding:11px 14px;margin:2px 0;
    border-radius:10px;color:#4b5874;
    cursor:pointer;font-size:14px;
    transition:all .15s ease;
    position:relative;
}
.admin-menu-item:hover{background:var(--admin-primary-soft);color:var(--admin-primary);}
.admin-menu-item.active{
    background:var(--admin-primary);color:#fff;
    font-weight:600;
}
.admin-menu-item .mi-icon{width:18px;height:18px;flex-shrink:0;display:flex;align-items:center;justify-content:center;}
.admin-menu-item .mi-icon svg{width:18px;height:18px;fill:currentColor;}
.admin-menu-item .mi-badge{
    margin-left:auto;background:var(--admin-danger);color:#fff;
    font-size:11px;border-radius:10px;padding:1px 7px;
}
.admin-menu-item.active .mi-badge{background:#fff;color:var(--admin-danger);}

.admin-sidebar-foot{
    padding:16px;border-top:1px solid var(--admin-border);
    font-size:12px;color:var(--admin-muted);
}
.admin-user{display:flex;align-items:center;gap:10px;}
.admin-user .au-avatar{
    width:36px;height:36px;border-radius:50%;
    background:var(--admin-primary);color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-weight:700;font-size:15px;flex-shrink:0;
}
.admin-user .au-name{font-size:13px;color:var(--admin-text);font-weight:600;}
.admin-user .au-role{font-size:11px;color:var(--admin-muted);}
.admin-logout{margin-left:auto;cursor:pointer;color:var(--admin-muted);}
.admin-logout:hover{color:var(--admin-danger);}

/* 主内容区 */
.admin-main{
    flex:1;margin-left:232px;
    display:flex;flex-direction:column;
    min-width:0;
}

/* 顶部栏 */
.admin-topbar{
    height:64px;background:#fff;border-bottom:1px solid var(--admin-border);
    display:flex;align-items:center;padding:0 24px;
    position:sticky;top:0;z-index:90;
    gap:16px;
}
.admin-topbar .tb-title{font-size:17px;font-weight:700;}
.admin-topbar .tb-search{
    margin-left:auto;display:flex;align-items:center;
    background:var(--admin-bg);border-radius:20px;
    padding:8px 16px;width:260px;
}
.admin-topbar .tb-search input{border:none;background:transparent;outline:none;flex:1;font-size:13px;color:var(--admin-text);}
.admin-topbar .tb-search svg{width:16px;height:16px;fill:var(--admin-muted);}
.admin-topbar .tb-action{
    width:40px;height:40px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;position:relative;color:var(--admin-muted);
}
.admin-topbar .tb-action:hover{background:var(--admin-bg);color:var(--admin-primary);}
.admin-topbar .tb-action svg{width:20px;height:20px;fill:currentColor;}
.admin-topbar .tb-action .dot{
    position:absolute;top:8px;right:8px;width:8px;height:8px;
    background:var(--admin-danger);border-radius:50%;
    border:2px solid #fff;
}

/* 内容区 */
.admin-content{padding:24px;flex:1;}

/* 汉堡按钮(移动端) */
.admin-menu-toggle{
    display:none;width:40px;height:40px;border:none;background:transparent;
    cursor:pointer;border-radius:8px;align-items:center;justify-content:center;
}
.admin-menu-toggle:hover{background:var(--admin-bg);}
.admin-menu-toggle svg{width:22px;height:22px;fill:var(--admin-text);}

/* ===== 通用组件 ===== */
.card{
    background:var(--admin-panel);
    border:1px solid var(--admin-border);
    border-radius:var(--admin-radius);
    box-shadow:var(--admin-shadow);
}
.card-head{
    padding:16px 20px;border-bottom:1px solid var(--admin-border);
    display:flex;align-items:center;justify-content:space-between;
}
.card-head .ch-title{font-size:15px;font-weight:700;}
.card-head .ch-extra{font-size:12px;color:var(--admin-muted);}
.card-body{padding:20px;}

/* 统计卡片 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:16px;}
.stat-card{
    background:#fff;border:1px solid var(--admin-border);
    border-radius:var(--admin-radius);padding:20px;
    box-shadow:var(--admin-shadow);
    display:flex;flex-direction:column;gap:8px;
}
.stat-card .sc-top{display:flex;align-items:center;justify-content:space-between;}
.stat-card .sc-label{font-size:13px;color:var(--admin-muted);}
.stat-card .sc-icon{
    width:44px;height:44px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
}
.stat-card .sc-icon svg{width:22px;height:22px;fill:currentColor;}
.stat-card .sc-value{font-size:26px;font-weight:700;color:var(--admin-text);}
.stat-card .sc-trend{font-size:12px;display:flex;align-items:center;gap:4px;}
.stat-card .sc-trend.up{color:var(--admin-success);}
.stat-card .sc-trend.down{color:var(--admin-danger);}

/* 表格 */
.table-wrap{overflow-x:auto;}
table.data-table{width:100%;border-collapse:collapse;font-size:13px;}
.data-table th{
    text-align:left;padding:12px 16px;color:var(--admin-muted);
    font-weight:600;border-bottom:1px solid var(--admin-border);
    white-space:nowrap;font-size:12px;
}
.data-table td{
    padding:14px 16px;border-bottom:1px solid var(--admin-border);
    color:#3a4a63;white-space:nowrap;
}
.data-table tbody tr:hover{background:var(--admin-primary-soft);}
.data-table tbody tr:last-child td{border-bottom:none;}

/* 标签/徽章 */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;}
.badge-blue{background:var(--admin-primary-soft);color:var(--admin-primary);}
.badge-green{background:#e8f9ef;color:var(--admin-success);}
.badge-orange{background:#fff4e5;color:var(--admin-warning);}
.badge-red{background:#fee9e9;color:var(--admin-danger);}
.badge-gray{background:#f0f2f7;color:var(--admin-muted);}

/* 按钮 */
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    padding:9px 18px;border-radius:8px;border:1px solid transparent;
    font-size:13px;font-weight:600;cursor:pointer;
    transition:all .15s ease;white-space:nowrap;
}
.btn-primary{background:var(--admin-primary);color:#fff;}
.btn-primary:hover{background:var(--admin-primary-deep);opacity:1;}
.btn-outline{background:#fff;color:var(--admin-primary);border-color:var(--admin-primary);}
.btn-outline:hover{background:var(--admin-primary-soft);opacity:1;}
.btn-light{background:var(--admin-bg);color:var(--admin-text);}
.btn-light:hover{background:#e8edf7;opacity:1;}
.btn-danger{background:var(--admin-danger);color:#fff;}
.btn-sm{padding:6px 12px;font-size:12px;}

/* 表单 */
.form-group{margin-bottom:16px;}
.form-label{display:block;font-size:13px;color:var(--admin-text);font-weight:600;margin-bottom:6px;}
.form-input{
    width:100%;padding:10px 14px;border:1px solid var(--admin-border);
    border-radius:8px;font-size:13px;color:var(--admin-text);
    outline:none;transition:border .15s;background:#fff;
}
.form-input:focus{border-color:var(--admin-primary);}
.form-select{appearance:none;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237f8da9' d='M6 8L1 3h10z'/%3E%3C/svg%3E") no-repeat right 14px center;}

/* 登录页 */
.login-page{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    background:
        radial-gradient(circle at top center, rgba(98,153,255,.18), transparent 40%),
        linear-gradient(180deg,#fbfdff 0%,#eef4ff 100%);
    padding:20px;
}
.login-box{
    width:100%;max-width:400px;
    background:#fff;border:1px solid var(--admin-border);
    border-radius:18px;padding:44px 36px;
    box-shadow:0 20px 60px rgba(54,93,180,.12);
}
.login-box .lb-logo{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:8px;}
.login-box .lb-logo img{height:40px;}
.login-box .lb-title{text-align:center;font-size:20px;font-weight:700;margin-bottom:4px;}
.login-box .lb-sub{text-align:center;font-size:13px;color:var(--admin-muted);margin-bottom:28px;}
.login-box .btn{width:100%;padding:12px;font-size:15px;margin-top:4px;}
.login-links{display:flex;justify-content:space-between;font-size:12px;margin-top:16px;color:var(--admin-muted);}
.login-links a{color:var(--admin-primary);}

/* 响应式 */
@media (max-width:991px){
    .stat-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:767px){
    .admin-sidebar{transform:translateX(-100%);}
    .admin-sidebar.open{transform:translateX(0);box-shadow:0 0 30px rgba(0,0,0,.15);}
    .admin-main{margin-left:0;}
    .admin-menu-toggle{display:flex;}
    .admin-topbar{padding:0 16px;}
    .admin-topbar .tb-search{display:none;}
    .admin-content{padding:16px;}
    .stat-grid{grid-template-columns:1fr 1fr;gap:12px;}
    .stat-card .sc-value{font-size:22px;}
    .admin-sidebar-backdrop{
        display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;
    }
    .admin-sidebar-backdrop.show{display:block;}
}