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#0000000a;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--duration-fast:.12s;--duration-normal:.2s;--font-display:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans", sans-serif;--font-body:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans", "Microsoft YaHei", sans-serif;--font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, 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.el-tag{--el-tag-bg-color:var(--bg-elevated);--el-tag-border-color:var(--border);--el-tag-text-color:var(--text-secondary)}[data-theme=dark] .el-form-item__label{color:var(--text-secondary)}[data-theme=dark] .el-loading-mask{background-color:#161618bf}[data-theme=dark] #app{background:var(--bg)!important}[data-theme=dark] .navbar{border-bottom-color:var(--border)!important;background:#161618eb!important}[data-theme=dark] .search-wrap{background:#ffffff0f!important}[data-theme=dark] .search-wrap:focus-within{background:var(--bg-elevated)!important;border-color:var(--primary)!important}[data-theme=dark] .search-input{color:var(--text-primary)!important}[data-theme=dark] .user-avatar-wrap{background:#ffffff0d!important;border-color:#ffffff14!important}[data-theme=dark] .mobile-menu-panel{background:#1c1c1ffa!important}[data-theme=dark] .theme-toggle:hover,[data-theme=dark] .notif-bell:hover{background:#ffffff14}[data-theme=dark] .el-avatar{--el-avatar-bg-color:#2e2e32}[data-theme=dark] ::selection{background:#14b8a64d}[data-theme=dark] .el-dropdown-menu{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .el-dropdown-menu__item{color:var(--text-primary)!important}[data-theme=dark] .el-dropdown-menu__item:hover{background:var(--bg-subtle)!important}[data-theme=dark] .el-popper{--el-bg-color-overlay:var(--card-bg)}[data-theme=dark] .el-message{--el-message-bg-color:var(--card-bg);--el-message-border-color:var(--border);--el-message-text-color:var(--text-primary)}[data-theme=dark] .announcement-card{background:var(--card-bg)!important}[data-theme=dark] .announcement-card.pinned{background:linear-gradient(135deg, #14b8a614, var(--card-bg) 40%)!important}[data-theme=dark] .home-sidebar .sidebar-card,[data-theme=dark] .home-content-card,[data-theme=dark] .qa-card,[data-theme=dark] .blog-card,[data-theme=dark] .team-card,[data-theme=dark] .snippet-card,[data-theme=dark] .list-card,[data-theme=dark] .profile-card,[data-theme=dark] .profile-banner,[data-theme=dark] .heatmap-card,[data-theme=dark] .edit-panel{background:var(--card-bg)!important}[data-theme=dark] .profile-name{color:var(--text-primary)!important}[data-theme=dark] .profile-avatar{border-color:var(--border)!important}[data-theme=dark] .stat strong{filter:brightness(1.2)}[data-theme=dark] .level-bar-bg{background:#2e2e32!important}[data-theme=dark] ::-webkit-scrollbar-thumb{background:#3e3e44}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:#52525b}[data-theme=dark] .hero-section{background:linear-gradient(135deg,#0f766e 0%,#0d9488 50%,#115e59 100%)!important}[data-theme=dark] .sidebar-card{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .checkin-card,[data-theme=dark] .leaderboard-card{background:var(--card-bg)!important}[data-theme=dark] .tab-content-item,[data-theme=dark] .oj-page,[data-theme=dark] .problem-list-container,[data-theme=dark] .problem-table,[data-theme=dark] .oj-header-card{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .problem-row{border-color:var(--divider)!important}[data-theme=dark] .problem-row:hover{background:var(--bg-subtle)!important}[data-theme=dark] .diff-btn{background:var(--bg-subtle)!important;border-color:var(--border)!important;color:var(--text-secondary)!important}[data-theme=dark] .diff-btn:hover,[data-theme=dark] .diff-btn.active{background:var(--primary-bg)!important;color:var(--primary)!important}[data-theme=dark] .problem-title-text{color:var(--text-primary)!important}[data-theme=dark] .table-head{background:var(--bg-subtle)!important;border-color:var(--border)!important}[data-theme=dark] .table-head span{color:var(--text-tertiary)!important}[data-theme=dark] .detail-container,[data-theme=dark] .problem-info-panel,[data-theme=dark] .editor-panel,[data-theme=dark] .test-panel,[data-theme=dark] .result-panel,[data-theme=dark] .submission-card,[data-theme=dark] .solution-card{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .problem-info-panel h1,[data-theme=dark] .problem-info-panel h2,[data-theme=dark] .problem-info-panel h3{color:var(--text-primary)!important}[data-theme=dark] .test-case-item,[data-theme=dark] .sample-card{background:var(--bg-subtle)!important;border-color:var(--border)!important}[data-theme=dark] .sample-card pre,[data-theme=dark] .test-case-input,[data-theme=dark] .test-case-output{background:var(--bg)!important;border-color:var(--border)!important;color:var(--text-primary)!important}[data-theme=dark] .tab-btn{background:var(--bg-subtle)!important;color:var(--text-secondary)!important;border-color:var(--border)!important}[data-theme=dark] .tab-btn.active,[data-theme=dark] .tab-btn:hover{background:var(--primary-bg)!important;color:var(--primary)!important}[data-theme=dark] .submission-row{border-color:var(--divider)!important}[data-theme=dark] .submission-row:hover{background:var(--bg-subtle)!important}[data-theme=dark] .status-badge{border-color:var(--border)!important}[data-theme=dark] .run-result-panel{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .modal-overlay{background:#0009!important}[data-theme=dark] .modal-content,[data-theme=dark] .problem-list-card,[data-theme=dark] .list-detail-card,[data-theme=dark] .problem-list-header{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .problem-list-card:hover{background:var(--bg-subtle)!important}[data-theme=dark] .create-form-card,[data-theme=dark] .create-section{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .create-section input,[data-theme=dark] .create-section select,[data-theme=dark] .create-section textarea{background:var(--bg)!important;border-color:var(--border)!important;color:var(--text-primary)!important}[data-theme=dark] .register-card{background:var(--card-bg)!important}[data-theme=dark] .captcha-box{background:var(--bg-subtle)!important}[data-theme=dark] .profile-provider-badge.local{background:var(--primary-bg)!important;color:var(--primary)!important}[data-theme=dark] .profile-stats{background:linear-gradient(180deg, var(--bg-subtle), var(--card-bg) 80%)!important}[data-theme=dark] .upload-card{background:var(--bg)!important;border-color:var(--border)!important}[data-theme=dark] .banner-preview{background:linear-gradient(135deg,#0f766e 0%,#0d9488 42%,#14b8a6 78%,#115e59 100%)!important}[data-theme=dark] .heatmap-cell{opacity:.9}[data-theme=dark] .profile-submissions-table th{border-color:var(--border)!important}[data-theme=dark] .profile-submissions-table td{border-color:var(--divider)!important}[data-theme=dark] .submission-profile-row:hover{background:var(--bg-subtle)!important}[data-theme=dark] .score-log-item{border-color:var(--divider)!important}[data-theme=dark] .admin-page .admin-card{background:var(--card-bg)!important}[data-theme=dark] .ai-chat-container,[data-theme=dark] .chat-message,[data-theme=dark] .chat-input-area{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .ai-message-content{background:var(--bg-subtle)!important}[data-theme=dark] .qa-detail-card,[data-theme=dark] .answer-card,[data-theme=dark] .answer-form-card,[data-theme=dark] .snippet-detail-card,[data-theme=dark] .snippet-header,[data-theme=dark] .team-detail-card,[data-theme=dark] .team-info-card{background:var(--card-bg)!important;border-color:var(--border)!important}[data-theme=dark] .nav-link:hover,[data-theme=dark] .mobile-nav-link:hover{background:#ffffff0f!important}[data-theme=dark] .podium-item.gold{background:linear-gradient(#fbbf2426,#fbbf240d)!important;border-color:#fbbf244d!important}[data-theme=dark] .podium-item.silver{background:linear-gradient(#94a3b826,#94a3b80d)!important;border-color:#94a3b84d!important}[data-theme=dark] .podium-item.bronze{background:linear-gradient(#d9770626,#d977060d)!important;border-color:#d977064d!important}[data-theme=dark] .leaderboard-table th{background:var(--bg-subtle)!important;border-color:var(--border)!important}[data-theme=dark] .leaderboard-table td{border-color:var(--divider)!important}[data-theme=dark] .leaderboard-table tr.top-three{background:#14b8a60f!important}[data-theme=dark] .rank-badge.gold{background:#fbbf2433!important}[data-theme=dark] .rank-badge.silver{background:#94a3b833!important}[data-theme=dark] .rank-badge.bronze{background:#d9770633!important}[data-theme=dark] .contest-card{background:var(--card-bg)!important}[data-theme=dark] .site-footer{background:var(--bg-elevated)!important;border-color:var(--border)!important}[data-theme=dark] 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var(--card-border);transition:border-color var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);margin-bottom:12px;padding:16px}.card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm)}.tag-item{border-radius:var(--radius-full);letter-spacing:.01em;transition:opacity var(--duration-fast);align-items:center;margin-bottom:4px;margin-right:6px;padding:3px 10px;font-size:12px;font-weight:500;display:inline-flex}.tag-item:hover{opacity:.85}.page-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.page-header h2{color:var(--text-primary);font-size:20px;font-weight:600}.markdown-body{color:var(--text-primary);font-size:15px;line-height:1.75}.markdown-body pre{color:#e2e8f0;border-radius:var(--radius-md);background:#1e293b;margin:16px 0;padding:20px;font-size:14px;overflow-x:auto}.markdown-body code{font-family:var(--font-mono);font-size:14px}.markdown-body p 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th{background:var(--bg);text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary);font-size:13px;font-weight:600}.el-button--primary{--el-button-bg-color:var(--primary);--el-button-border-color:var(--primary);--el-button-hover-bg-color:var(--primary-dark);--el-button-hover-border-color:var(--primary-dark)}.el-tabs__active-bar{background-color:var(--primary)!important}.el-tabs__item.is-active{color:var(--primary)!important}.el-menu--horizontal .el-menu-item.is-active{border-bottom-color:var(--primary)!important;color:var(--primary)!important}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}::-webkit-scrollbar-track{background:0 0}@media (width<=768px){.page-container{padding:12px 14px 32px}.card{padding:14px}}