/* 競賽專區特定樣式 */
        body[data-page="clubs"] .club-view {
            width: 100%;
            animation: fadeIn 0.3s ease-in-out;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        body[data-page="clubs"] .clubs-header-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            margin-bottom: 20px;
        }
        body[data-page="clubs"] .clubs-filter-tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 10px;
        }
        body[data-page="clubs"] .filter-tab {
            padding: 8px 16px;
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-weight: 500;
            border-radius: 20px;
            transition: all 0.3s;
        }
        body[data-page="clubs"] .filter-tab:hover {
            background: var(--hover-color);
        }
        body[data-page="clubs"] .filter-tab.active {
            background: var(--primary-color);
            color: white;
        }
        body[data-page="clubs"] .club-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 16px;
            transition: all 0.3s;
            cursor: pointer;
        }
        body[data-page="clubs"] .club-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 2px 8px rgba(29, 155, 240, 0.1);
        }
        body[data-page="clubs"] .club-card-header {
            display: flex;
            gap: 16px;
            margin-bottom: 16px;
        }
        body[data-page="clubs"] .club-avatar {
            width: 64px;
            height: 64px;
            border-radius: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
            font-weight: bold;
            flex-shrink: 0;
        }
        body[data-page="clubs"] .club-card-info {
            flex: 1;
            min-width: 0;
        }
        body[data-page="clubs"] .club-card-title {
            font-size: 1.25em;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        body[data-page="clubs"] .club-card-meta {
            display: flex;
            gap: 16px;
            color: var(--text-secondary);
            font-size: 0.9em;
        }
        body[data-page="clubs"] .club-card-meta-item {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        body[data-page="clubs"] .club-card-description {
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 16px;
        }
        body[data-page="clubs"] .club-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }
        body[data-page="clubs"] .club-stats {
            display: flex;
            gap: 20px;
            font-size: 0.9em;
        }
        body[data-page="clubs"] .club-stat {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
        }
        body[data-page="clubs"] .club-stat i {
            color: var(--primary-color);
        }
        body[data-page="clubs"] .club-type-badge {
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 0.85em;
            font-weight: 600;
        }
        body[data-page="clubs"] .club-type-public {
            background: rgba(29, 155, 240, 0.1);
            color: var(--primary-color);
        }
        body[data-page="clubs"] .club-type-private {
            background: rgba(118, 75, 162, 0.1);
            color: #764ba2;
        }
        body[data-page="clubs"] .empty-clubs {
            text-align: center;
            padding: 60px 20px;
        }
        body[data-page="clubs"] .empty-clubs-icon {
            font-size: 64px;
            color: var(--text-tertiary);
            margin-bottom: 16px;
        }
        body[data-page="clubs"] .empty-clubs-text {
            color: var(--text-secondary);
            font-size: 1.1em;
            margin-bottom: 24px;
        }
        /* 創建競賽模態框 */
        body[data-page="clubs"] .club-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 10000;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        body[data-page="clubs"] .club-modal.show {
            display: flex;
        }
        body[data-page="clubs"] .club-modal-content {
            background: var(--bg-primary);
            border-radius: 16px;
            padding: 32px;
            max-width: 600px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
            border: 1px solid var(--border-color);
        }
        body[data-page="clubs"] .club-modal-header {
            font-size: 1.5em;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--text-primary);
        }
        body[data-page="clubs"] .form-group {
            margin-bottom: 20px;
        }
        body[data-page="clubs"] .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        body[data-page="clubs"] .form-input,
body[data-page="clubs"] .form-textarea,
body[data-page="clubs"] .form-select {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1em;
            font-family: inherit;
            background: var(--bg-primary);
            color: var(--text-primary);
        }
        body[data-page="clubs"] .form-textarea {
            resize: vertical;
            min-height: 100px;
        }
        body[data-page="clubs"] .form-input:focus,
body[data-page="clubs"] .form-textarea:focus,
body[data-page="clubs"] .form-select:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        body[data-page="clubs"] .modal-actions {
            display: flex;
            gap: 12px;
            justify-content: flex-end;
            margin-top: 24px;
        }
        body[data-page="clubs"] .btn-secondary {
            padding: 10px 24px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        body[data-page="clubs"] .btn-secondary:hover {
            background: var(--hover-color);
        }

        /* ==================== 手機版排版（2026-07-20新增）====================
           clubs.css原本全站唯一沒有任何@media的CSS檔案，卡片/表單/modal沿用桌面版
           固定尺寸在窄螢幕會擠壓變形。以下針對768px以下調整：
           - 競賽卡片：頭像縮小、meta資訊改直排避免溢出、footer按鈕群改可換行
           - 篩選tabs：允許橫向捲動避免文字被壓縮換行
           - modal：改滿版全螢幕式（貼齊常見手機App慣例），padding縮小
           - 表單：input/select字體避免iOS Safari自動放大(16px下限) */
        @media (max-width: 768px) {
            body[data-page="clubs"] .page-header {
                padding: 12px 16px;
            }
            body[data-page="clubs"] .page-title {
                font-size: 1.1em;
            }
            body[data-page="clubs"] .clubs-header-card > div {
                padding: 14px 16px !important;
                flex-wrap: wrap;
            }
            body[data-page="clubs"] .clubs-header-card .action-btn {
                padding: 8px 14px !important;
                font-size: 12px !important;
            }
            body[data-page="clubs"] .clubs-filter-tabs {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                flex-wrap: nowrap;
                gap: 8px;
                margin-bottom: 16px;
                padding-bottom: 8px;
            }
            body[data-page="clubs"] .filter-tab {
                flex-shrink: 0;
                padding: 8px 14px;
                font-size: 0.9em;
                white-space: nowrap;
            }
            body[data-page="clubs"] .club-card {
                padding: 16px;
                margin-bottom: 12px;
                border-radius: 12px;
            }
            body[data-page="clubs"] .club-card-header {
                gap: 10px;
                flex-wrap: wrap;
            }
            body[data-page="clubs"] .club-avatar {
                width: 48px;
                height: 48px;
                font-size: 20px;
                border-radius: 10px;
            }
            body[data-page="clubs"] .club-card-title {
                font-size: 1.05em;
            }
            body[data-page="clubs"] .club-card-meta {
                flex-direction: column;
                gap: 4px;
                font-size: 0.85em;
            }
            body[data-page="clubs"] .club-card-header .btn-secondary {
                margin-left: 0 !important;
                padding: 6px 12px !important;
                font-size: 0.85em;
            }
            body[data-page="clubs"] .club-card-footer {
                flex-wrap: wrap;
                gap: 10px;
            }
            body[data-page="clubs"] .club-stats {
                flex-wrap: wrap;
                gap: 10px;
            }
            body[data-page="clubs"] .club-type-badge {
                font-size: 0.8em;
                padding: 3px 10px;
            }
            /* Modal 改滿版全螢幕式，貼齊手機App慣例，避免小螢幕上90%寬度仍顯擁擠 */
            body[data-page="clubs"] .club-modal {
                padding: 0;
                align-items: flex-end;
            }
            body[data-page="clubs"] .club-modal-content {
                width: 100%;
                max-width: 100%;
                max-height: 92vh;
                border-radius: 16px 16px 0 0;
                padding: 20px 16px calc(20px + env(safe-area-inset-bottom));
            }
            body[data-page="clubs"] .club-modal-header {
                font-size: 1.25em;
                margin-bottom: 18px;
            }
            body[data-page="clubs"] .form-input,
            body[data-page="clubs"] .form-textarea,
            body[data-page="clubs"] .form-select {
                font-size: 16px; /* 避免 iOS Safari focus 時自動放大整頁 */
                padding: 10px 12px;
            }
            body[data-page="clubs"] .modal-actions {
                flex-direction: column-reverse;
                gap: 10px;
            }
            body[data-page="clubs"] .modal-actions .action-btn,
            body[data-page="clubs"] .modal-actions .btn-secondary {
                width: 100%;
                text-align: center;
                padding: 12px 0;
            }
            body[data-page="clubs"] .empty-clubs {
                padding: 40px 16px;
            }
            body[data-page="clubs"] .empty-clubs-icon {
                font-size: 48px;
            }
        }