/* ===== CSS 变量 ===== */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --bg: #f7f8fa;
    --bg-card: #ffffff;
    --bg-hover: #f3f4f6;
    --border: #e5e7eb;
    --text: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --success: #10b981;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --warning: #f59e0b;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05);
    --header-h: 56px;
    --max-w: 960px;
    --font: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
    --mono: "SF Mono","Fira Code","Fira Mono","Roboto Mono",Consolas,monospace;
}

[data-theme="dark"] {
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --primary-light: #1e1b4b;
    --bg: #0f1115;
    --bg-card: #1a1d23;
    --bg-hover: #252932;
    --border: #2d3139;
    --text: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --danger: #f87171;
    --danger-bg: #1c1213;
    --danger-border: #3b1d1d;
    --success-bg: #0a1f17;
    --success-border: #1a3a2a;
    --shadow: 0 1px 3px rgba(0,0,0,.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.5);
}

/* ===== 重置 ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh;display:flex;flex-direction:column;transition:background .2s,color .2s}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea,select{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
img{max-width:100%;height:auto}

/* ===== 顶部导航 ===== */
.topbar{position:sticky;top:0;z-index:100;background:var(--bg-card);border-bottom:1px solid var(--border);height:var(--header-h)}
.topbar-inner{max-width:var(--max-w);margin:0 auto;height:100%;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:700;white-space:nowrap}
.brand-logo{width:28px;height:28px;border-radius:6px;object-fit:cover}
.brand-icon{font-size:24px}
.nav-actions{display:flex;align-items:center;gap:4px}
.nav-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-secondary);transition:all .15s;text-decoration:none;white-space:nowrap}
.nav-btn:hover{background:var(--bg-hover);color:var(--text)}
.nav-btn.active{color:var(--primary);font-weight:600;background:var(--primary-light)}
.nav-btn svg{flex-shrink:0}
.nav-avatar{background:none;border:none;cursor:pointer;padding:0;margin-left:4px;display:flex;align-items:center}
.nav-link{padding:6px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-secondary);transition:all .15s;display:flex;align-items:center;gap:6px}
.nav-link:hover{background:var(--bg-hover);color:var(--text)}
.nav-link.active{color:var(--primary);font-weight:600}

/* 主题切换 */
.theme-toggle{padding:8px;border-radius:var(--radius-sm);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;transition:all .15s}
.theme-toggle:hover{background:var(--bg-hover);color:var(--text)}
.theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:block}

/* 头像 */
.avatar{width:30px;height:30px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;text-transform:uppercase}

/* 下拉菜单 */
.dropdown{position:relative}
.dropdown-toggle{display:flex;align-items:center}
.dropdown-menu{position:absolute;right:0;top:100%;margin-top:4px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);min-width:160px;padding:4px;opacity:0;visibility:hidden;transform:translateY(-4px);transition:all .15s;z-index:200}
.dropdown.open .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-header{padding:8px 10px;font-size:12px;color:var(--text-muted);border-bottom:1px solid var(--border);margin-bottom:4px}
.dropdown-item{display:block;padding:8px 10px;border-radius:var(--radius-sm);font-size:14px;color:var(--text);transition:background .1s}
.dropdown-item:hover{background:var(--bg-hover)}
.dropdown-item.danger{color:var(--danger)}
.dropdown-item.danger:hover{background:var(--danger-bg)}

/* ===== 主内容 ===== */
.main-content{flex:1;max-width:var(--max-w);margin:0 auto;width:100%;padding:24px 16px}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;transition:all .15s;white-space:nowrap}
.btn-sm{padding:6px 14px;font-size:13px}
.btn-lg{padding:12px 24px;font-size:16px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-outline{border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{background:var(--bg-hover);border-color:var(--text-muted)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{opacity:.9}
.btn-ghost{color:var(--text-secondary)}
.btn-ghost:hover{background:var(--bg-hover);color:var(--text)}
.btn-block{width:100%}

/* ===== 工具栏 ===== */
.toolbar{display:flex;align-items:center;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.search-box{flex:1;min-width:200px;position:relative}
.search-box input{width:100%;padding:8px 12px 8px 36px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text);transition:border-color .15s}
.search-box input:focus{border-color:var(--primary);outline:none}
.search-box .search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}
.toolbar-actions{display:flex;gap:6px;align-items:center}

/* ===== 密钥卡片网格 ===== */
.secret-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.secret-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;transition:all .2s;position:relative;cursor:pointer;box-shadow:var(--shadow)}
.secret-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary);transform:translateY(-2px)}
.secret-card-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.secret-icon{width:40px;height:40px;border-radius:10px;background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.secret-info{flex:1;min-width:0}
.secret-issuer{font-weight:600;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.secret-account{font-size:12px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:2px}
.secret-code{font-family:var(--mono);font-size:30px;font-weight:700;letter-spacing:3px;color:var(--primary);text-align:center;padding:10px 0;user-select:none;cursor:pointer;transition:opacity .15s;background:var(--bg);border-radius:var(--radius-sm);margin:4px 0}
.secret-code.copied{color:var(--success)}
.secret-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:10px}
.progress-bar{flex:1;height:4px;background:var(--border);border-radius:2px;overflow:hidden;margin-right:10px}
.progress-fill{height:100%;background:var(--primary);border-radius:2px;transition:width 1s linear,width .3s ease}

.card-menu{position:absolute;top:8px;right:8px;opacity:0;transition:opacity .15s}
.secret-card:hover .card-menu{opacity:1}
.card-menu-btn{padding:4px 6px;border-radius:var(--radius-sm);color:var(--text-muted);transition:all .15s;font-size:18px;line-height:1}
.card-menu-btn:hover{background:var(--bg-hover);color:var(--text)}

/* 空状态 */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.empty-state .empty-icon{font-size:48px;margin-bottom:12px}
.empty-state h3{font-size:18px;color:var(--text);margin-bottom:8px}
.empty-state p{font-size:14px;margin-bottom:20px}

/* ===== 表单 ===== */
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text)}
input[type="color"].form-input{height:42px;padding:4px;cursor:pointer}
input[type="color"].form-input::-webkit-color-swatch-wrapper{padding:0}
input[type="color"].form-input::-webkit-color-swatch{border:none;border-radius:4px}
input[type="color"].form-input::-moz-color-swatch{border:none;border-radius:4px}
.form-input,.form-select,.form-textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text);transition:border-color .15s}
.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.form-textarea{resize:vertical;min-height:80px}
.form-hint{font-size:12px;color:var(--text-muted);margin-top:4px}
.form-row{display:flex;gap:12px}
.form-row .form-group{flex:1}
.advanced-toggle{font-size:13px;color:var(--primary);cursor:pointer;display:inline-flex;align-items:center;gap:4px;margin-bottom:12px}
.advanced-toggle:hover{text-decoration:underline}
.advanced-fields{display:none}
.advanced-fields.open{display:block}

/* ===== Auth 页面 ===== */
.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - var(--header-h));padding:20px}
.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:32px;width:100%;max-width:400px}
.auth-title{font-size:24px;font-weight:700;text-align:center;margin-bottom:8px}
.auth-sub{font-size:14px;color:var(--text-secondary);text-align:center;margin-bottom:24px}
.auth-notice{background:var(--primary-light);color:var(--primary);padding:10px 12px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:16px}
.auth-footer{text-align:center;font-size:14px;margin-top:16px;color:var(--text-secondary)}
.auth-footer a{color:var(--primary)}
.form-error{background:var(--danger-bg);color:var(--danger);padding:10px 12px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:16px}

/* 游客提示 */
.guest-banner{background:var(--primary-light);border:1px solid var(--primary);border-radius:var(--radius);padding:12px 16px;margin-bottom:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px}
.guest-banner-text{flex:1}
.guest-banner-actions{display:flex;gap:8px}

/* ===== 游客动态码查看器 ===== */
.guest-viewer{max-width:560px;margin:0 auto;padding:8px 0}
.guest-viewer-card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:32px 28px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.guest-viewer-header{text-align:center;margin-bottom:24px}
.guest-viewer-header h2{font-size:22px;font-weight:700;margin-bottom:6px;color:var(--text)}
.guest-viewer-sub{font-size:13px;color:var(--text-muted);line-height:1.5}
.guest-viewer-input{margin-bottom:20px}
.guest-viewer-input .input-row{display:flex;gap:8px;align-items:stretch}
.guest-viewer-input input{flex:1;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:14px;transition:border-color .2s}
.guest-viewer-input input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.guest-hint{font-size:12px;color:var(--text-muted);margin-top:6px;padding-left:4px}

/* 动态码显示区 */
.guest-code-display{background:var(--bg-hover);border-radius:12px;padding:28px 20px;min-height:180px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;margin-bottom:20px}
.guest-code-empty{color:var(--text-muted)}
.guest-code-icon{font-size:48px;display:block;margin-bottom:12px;opacity:.5}
.guest-code-empty p{font-size:14px}
.guest-code-info{margin-bottom:10px;min-height:20px}
.guest-code-issuer{font-size:14px;font-weight:600;color:var(--text);margin-right:8px}
.guest-code-account{font-size:13px;color:var(--text-muted)}
.guest-code-value{font-family:var(--mono);font-size:42px;font-weight:700;letter-spacing:4px;color:var(--primary);cursor:pointer;user-select:none;transition:transform .15s;line-height:1.2;padding:4px 12px;border-radius:8px}
.guest-code-value:hover{transform:scale(1.03)}
.guest-code-value:active{transform:scale(.98)}
.guest-code-meta{display:flex;align-items:center;gap:10px;margin-top:14px;width:100%;max-width:240px}
.guest-code-progress{flex:1;height:3px;background:var(--border);border-radius:2px;overflow:hidden}
.guest-code-progress-bar{height:100%;background:var(--primary);border-radius:2px;transition:width 1s linear}
.guest-code-countdown{font-size:12px;color:var(--text-muted);min-width:32px;text-align:right;font-variant-numeric:tabular-nums}
.guest-code-hint{font-size:11px;color:var(--text-muted);margin-top:14px;opacity:.7}

.guest-viewer-actions{display:flex;gap:10px;justify-content:center;padding-top:8px;border-top:1px solid var(--border);padding-top:16px}
.guest-viewer-actions .btn{min-width:120px}

/* 移动端适配 */
@media (max-width:640px){
    .guest-viewer-card{padding:24px 18px}
    .guest-viewer-input .input-row{flex-wrap:wrap}
    .guest-viewer-input input{width:100%;flex:1 1 100%}
    .guest-viewer-input .input-row .btn{flex:1}
    .guest-code-value{font-size:34px;letter-spacing:3px}
    .guest-viewer-actions{flex-direction:column}
    .guest-viewer-actions .btn{width:100%}
}

/* ===== 管理后台 ===== */
.admin-layout{display:flex;gap:0;max-width:var(--max-w);margin:0 auto;width:100%;padding:0 16px;gap:16px}
.admin-sidebar{width:200px;flex-shrink:0;padding-top:16px}
.admin-content{flex:1;min-width:0;padding-top:16px;padding-bottom:24px}
.admin-nav-item{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-secondary);transition:all .15s;margin-bottom:2px}
.admin-nav-item:hover{background:var(--bg-hover);color:var(--text)}
.admin-nav-item.active{background:var(--primary);color:#fff}
.admin-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:16px;box-shadow:var(--shadow)}
.admin-section-title{font-size:18px;font-weight:600;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}

/* 后台卡片 */
.admin-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow);transition:box-shadow .2s}
.admin-card:hover{box-shadow:var(--shadow-md)}
.admin-card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 20px;background:var(--bg-hover);border-bottom:1px solid var(--border);flex-wrap:wrap}
.admin-card-header h3{font-size:15px;font-weight:600;color:var(--text);margin:0}
.admin-card-desc{font-size:12px;color:var(--text-muted)}
.admin-card-body{padding:20px}
.admin-alert{padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:16px;font-size:14px}
.admin-alert-success{background:var(--success-bg);color:var(--success);border:1px solid var(--success-border)}
.admin-alert-error{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}
.admin-save-bar{position:sticky;bottom:0;left:0;right:0;background:var(--bg-card);padding:16px 20px;text-align:right;border:1px solid var(--border);border-radius:var(--radius);margin-top:16px;box-shadow:var(--shadow-md)}
.form-row-switch{align-items:flex-end}
.form-group-switch{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.form-switch-label{font-size:14px;color:var(--text);white-space:nowrap}
.footer-links-list{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
.footer-link-row{align-items:center}
.form-textarea-code{font-family:var(--mono);font-size:13px;min-height:100px}
.form-file{font-size:14px;padding:8px}

/* 上传 Logo 按钮 */
.upload-logo-wrapper{display:flex;align-items:center;gap:10px}
.upload-logo-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--bg-card);border:1px dashed var(--primary);border-radius:var(--radius-sm);color:var(--primary);cursor:pointer;font-size:14px;transition:all .15s;white-space:nowrap}
.upload-logo-btn:hover{background:var(--primary);color:#fff;border-style:solid}
.upload-logo-wrapper input[type="file"]{display:none}
.upload-file-name{font-size:13px;color:var(--text-muted)}

/* 分组筛选条 */
.group-filter-bar{display:flex;align-items:center;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.group-filter-label{font-size:13px;color:var(--text-muted);white-space:nowrap}
.group-chip{display:inline-flex;align-items:center;padding:4px 14px;border:1px solid var(--border);border-radius:16px;font-size:13px;color:var(--text-secondary);cursor:pointer;transition:all .15s;white-space:nowrap;background:var(--bg-card)}
.group-chip:hover{border-color:var(--primary);color:var(--primary)}
.group-chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.group-chip .group-count{font-size:11px;opacity:.7;margin-left:4px}
.group-chip-manage{border-style:dashed}
.setting-switch-row{display:flex;align-items:center;gap:12px;padding:12px 0}
.setting-switch-row .switch{flex-shrink:0}
.setting-switch-row .setting-switch-info{flex:1}
.setting-switch-row .setting-switch-label{font-size:14px;font-weight:500;color:var(--text)}
.setting-switch-row .setting-switch-desc{font-size:12px;color:var(--text-muted);margin-top:2px}

/* 表格 */
.data-table{width:100%;border-collapse:collapse;table-layout:auto}
.admin-card-body{overflow-x:auto;-webkit-overflow-scrolling:touch}
.data-table th,.data-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border);font-size:14px;vertical-align:middle}
.data-table th{font-weight:600;color:var(--text-secondary);font-size:13px;white-space:nowrap}
.data-table tr:hover td{background:var(--bg-hover)}
.badge{display:inline-flex;align-items:center;justify-content:center;padding:3px 10px;border-radius:12px;font-size:12px;font-weight:500;line-height:1.5;white-space:nowrap}
.badge-admin{background:#dbeafe;color:#1e40af}
.badge-user{background:var(--bg-hover);color:var(--text-secondary)}
.badge-active{background:#d1fae5;color:#065f46}
.badge-disabled{background:var(--danger-bg);color:var(--danger)}

/* 页脚链接行 (手机端垂直排列) */
.footer-link-row{align-items:center}
@media (max-width:768px){
    .footer-link-row{flex-direction:column;align-items:stretch;gap:6px}
    .footer-link-row .btn{width:100%}
}

/* 统计卡片 */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:20px}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.stat-value{font-size:28px;font-weight:700;color:var(--primary)}
.stat-label{font-size:13px;color:var(--text-secondary);margin-top:4px}

/* 用户头像 */
.user-avatar-sm{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-size:13px;font-weight:600;flex-shrink:0}

/* 用户表格行 */
.user-row-name{display:flex;align-items:center;gap:8px}
.user-row-name .user-name-text{font-weight:500;color:var(--text)}
.text-muted-2{color:var(--text-muted);font-size:12px;white-space:nowrap}
.data-table .col-email{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.data-table .col-action{white-space:nowrap}

/* 操作按钮组 */
.action-btns{display:flex;gap:6px;align-items:center;flex-wrap:nowrap}
.action-btn{display:inline-flex;align-items:center;padding:5px 12px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:all .15s;white-space:nowrap;line-height:1.5}
.action-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.action-btn.danger:hover{background:var(--danger);color:#fff;border-color:var(--danger)}

/* 分页 */
.pagination{display:flex;justify-content:center;gap:6px;margin-top:16px;flex-wrap:wrap}
.pagination .page-btn{min-width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;color:var(--text-secondary);background:var(--bg-card);cursor:pointer;transition:all .15s;text-decoration:none}
.pagination .page-btn:hover{border-color:var(--primary);color:var(--primary)}
.pagination .page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== 模态框 ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px;opacity:0;visibility:hidden;transition:opacity .2s}
.modal-overlay.open{opacity:1;visibility:visible}
.modal{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;max-width:460px;max-height:90vh;overflow-y:auto;transform:scale(.95);transition:transform .2s}
.modal-overlay.open .modal{transform:scale(1)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-title{font-size:18px;font-weight:600}
.modal-close{padding:4px;color:var(--text-muted);font-size:22px;line-height:1}
.modal-close:hover{color:var(--text)}
.modal-body{padding:20px}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:16px 20px;border-top:1px solid var(--border)}

/* ===== Toast ===== */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--text);color:var(--bg);padding:10px 20px;border-radius:var(--radius);font-size:14px;box-shadow:var(--shadow-lg);z-index:2000;opacity:0;transition:all .3s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== QR 码弹窗 ===== */
.qr-display{text-align:center;padding:20px}
.qr-display canvas,.qr-display img{border-radius:8px}
.qr-uri{margin-top:12px;padding:8px;border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--mono);font-size:12px;word-break:break-all;color:var(--text-secondary);text-align:left}

/* 开关 */
.switch{position:relative;display:inline-block;width:42px;height:24px}
.switch input{opacity:0;width:0;height:0}
.switch-slider{position:absolute;cursor:pointer;inset:0;background:var(--border);border-radius:24px;transition:.3s}
.switch-slider:before{content:"";position:absolute;height:18px;width:18px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.3s}
.switch input:checked + .switch-slider{background:var(--primary)}
.switch input:checked + .switch-slider:before{transform:translateX(18px)}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg-card);border-top:1px solid var(--border);padding:16px;margin-top:auto}
.footer-inner{max-width:var(--max-w);margin:0 auto;padding:0 16px;text-align:center}
.footer-copy{font-size:13px;color:var(--text-muted)}
.footer-beian{margin-top:4px}
.beian-link{font-size:12px;color:var(--text-muted)}
.beian-link:hover{color:var(--text-secondary)}
.footer-links{margin-top:6px;display:flex;gap:12px;justify-content:center}
.footer-links a{font-size:12px;color:var(--text-muted)}
.footer-links a:hover{color:var(--text-secondary)}

/* ===== 导入导出区域 ===== */
.import-area{width:100%;min-height:120px;padding:12px;border:2px dashed var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);resize:vertical;font-family:var(--mono);font-size:13px;transition:border-color .15s}
.import-area:focus{border-color:var(--primary);outline:none}
.import-area.dragover{border-color:var(--primary);background:var(--primary-light)}

/* ===== 拖拽排序 ===== */
.secret-card.dragging{opacity:.4;transform:scale(.95)}
.secret-card.drag-over{border:2px dashed var(--primary);border-radius:var(--radius)}

/* ===== 置顶标记 ===== */
.star-indicator{position:absolute;top:8px;left:8px;color:#fbbf24;font-size:14px;z-index:5}

/* ===== 响应式 ===== */
@media (max-width:768px){
    .main-content{padding:16px 12px}
    .secret-grid{grid-template-columns:1fr;gap:12px}
    .topbar-inner{padding:0 12px;gap:4px}
    .brand{font-size:15px;gap:6px;min-width:0;overflow:hidden}
    .brand-logo{width:24px;height:24px;flex-shrink:0}
    .brand-icon{font-size:20px;flex-shrink:0}
    .brand-name{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:140px}
    .nav-actions{gap:2px}
    .nav-btn{padding:7px 8px;font-size:13px}
    .nav-btn span{display:none}
    .nav-btn svg{width:18px;height:18px}
    .nav-link{padding:6px 8px}
    .theme-toggle{padding:6px}
    .auth-card{padding:24px 18px}
    .admin-layout{flex-direction:column;gap:12px;padding:0 12px}
    .admin-sidebar{width:100%;display:flex;overflow-x:auto;padding-top:8px;-webkit-overflow-scrolling:touch;gap:6px}
    .admin-sidebar::-webkit-scrollbar{height:4px}
    .admin-nav-item{white-space:nowrap;margin-right:0;margin-bottom:0;padding:8px 12px;font-size:13px}
    .admin-content{padding-top:8px;padding-bottom:20px;width:100%;min-width:0}
    .form-row{flex-direction:column}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:10px}
    .stat-card{padding:12px}
    .stat-value{font-size:22px}
    .stat-label{font-size:12px}
    .secret-code{font-size:26px;letter-spacing:2px}
    .secret-card{padding:14px}
    .secret-card-header{gap:10px;margin-bottom:10px}
    .secret-icon{width:36px;height:36px;font-size:18px}
    .secret-issuer{font-size:14px}
    .modal{max-width:calc(100vw - 24px)}
    .modal-body{padding:16px}
    .modal-header{padding:12px 16px}
    .modal-footer{padding:12px 16px;flex-wrap:wrap}
    .modal-footer .btn{flex:1;min-width:80px}
    .admin-section{padding:16px;margin-bottom:12px}
    .admin-section-title{font-size:16px;margin-bottom:12px;padding-bottom:8px}
    .admin-card-body{padding:14px}
    .admin-card-header{padding:12px 14px}
    .toolbar{flex-direction:column;align-items:stretch;gap:10px}
    .toolbar-actions{justify-content:stretch;flex-wrap:wrap}
    .toolbar-actions .btn{flex:1;min-width:0;padding:8px 10px;font-size:12px}
    .search-box{min-width:auto}
    .search-box input{padding:10px 12px 10px 34px;font-size:14px}
    .data-table{font-size:12px}
    .data-table th,.data-table td{padding:8px 8px}
    .action-btn{padding:4px 10px;font-size:12px}
    .pagination{gap:4px}
    .pagination .page-btn{min-width:28px;height:28px;font-size:12px}
    .group-filter-bar{gap:6px}
    .group-chip{padding:3px 10px;font-size:12px}
    .form-input,.form-select,.form-textarea{padding:10px;font-size:15px}
    .upload-logo-wrapper{flex-wrap:wrap}
    .footer-inner{padding:0 12px}
    .footer-copy{font-size:12px}
    .footer-links{gap:8px;flex-wrap:wrap}
    .footer-links a{font-size:11px}
    .guest-viewer-card{padding:24px 18px}
    .guest-viewer-header h2{font-size:18px}
    .guest-viewer-input input{padding:12px;font-size:15px}
    .guest-code-value{font-size:34px;letter-spacing:3px}
    .guest-code-display{padding:20px 14px;min-height:140px}
    .beian-link{font-size:11px}
    .admin-save-bar{padding:12px;text-align:center}
    .admin-save-bar .btn{width:100%}
    .dropdown-menu{min-width:140px;right:-8px}
}

@media (max-width:480px){
    .stats-grid{grid-template-columns:1fr;gap:8px}
    .secret-card{padding:12px}
    .secret-code{font-size:24px;letter-spacing:1px}
    .secret-issuer{font-size:13px}
    .secret-account{font-size:11px}
    .toolbar-actions .btn{font-size:12px;padding:8px 8px}
    .toolbar-actions{gap:6px}
    .auth-card{padding:20px 16px}
    .auth-title{font-size:20px}
    .modal-body{padding:14px}
    .modal-title{font-size:16px}
    .btn{padding:10px 14px;font-size:14px}
    .btn-sm{padding:8px 12px}
    .guest-code-value{font-size:28px;letter-spacing:2px}
    .data-table{font-size:11px}
    .data-table th,.data-table td{padding:6px 6px}
    .action-btns{gap:4px}
    .action-btn{padding:4px 8px;font-size:11px}
    .user-avatar-sm{width:24px;height:24px;font-size:11px}
    .user-row-name{gap:6px}
    .form-row{gap:0}
    .upload-logo-btn{font-size:12px;padding:6px 12px}
    .footer-links{flex-direction:column;gap:4px}
    .pagination .page-btn{min-width:26px;height:26px;font-size:11px}
    .brand-name{max-width:100px;font-size:14px}
}

/* 平板 */
@media (min-width:769px) and (max-width:1024px){
    .secret-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
    .admin-layout{padding:0 12px}
}

/* 动画 */
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeIn .2s ease}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite;display:inline-block}

/* 滚动条 */
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}