* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }
        html, body {
            width: 100%;
            min-height: 100vh;
            background: #0b1219;
        }
        body {
            display: flex;
            justify-content: center;
            align-items: flex-start;
            padding: 0;
        }
        .app {
            width: 100%;
            max-width: 100%;
            min-height: 100vh;
            background: transparent;
            background-image: url("img/bg2.png");
            background-size: cover;
            display: flex;
            flex-direction: column;
            padding-bottom: 86px;
            position: relative;
        }

        /* ===== 頂部 (返回按鈕) ===== */
        .header {
            display: flex;
            align-items: center;
            padding: 16px 16px 12px;
            background: rgba(15, 26, 38, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            flex-shrink: 0;
            gap: 12px;
        }
        .back-btn {
            background: rgba(26, 41, 56, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: #cfdde9;
            width: 40px;
            height: 40px;
            border-radius: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            cursor: pointer;
            transition: 0.2s;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
            backdrop-filter: blur(4px);
            flex-shrink: 0;
            text-decoration: none;
        }
        .back-btn:hover {
            background: rgba(36, 56, 75, 0.85);
            color: #fff;
        }
        .header-title {
            font-weight: 700;
            font-size: 18px;
            color: #eaeef3;
            flex: 1;
        }
        .header-right {
            width: 40px;
            flex-shrink: 0;
        }

        /* ===== 主內容 ===== */
        .main {
            flex: 1;
            padding: 12px 16px 0;
            width: 100%;
        }

        /* ===== 當前VIP狀態卡片 ===== */
        .vip-status-card {
            background: linear-gradient(145deg, rgba(20, 33, 46, 0.8), rgba(10, 20, 30, 0.8));
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 24px;
            padding: 22px 20px;
            border: 1px solid rgba(212, 175, 110, 0.2);
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
            margin-bottom: 16px;
            position: relative;
            overflow: hidden;
        }
        .vip-status-card::before {
            content: '👑';
            position: absolute;
            right: 16px;
            top: 16px;
            font-size: 40px;
            opacity: 0.15;
        }
        .vip-current-level {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .vip-current-level .level-badge {
            background: linear-gradient(135deg, #d4af6e, #b8924a);
            color: #0b1219;
            font-size: 20px;
            font-weight: 800;
            padding: 8px 20px;
            border-radius: 40px;
            letter-spacing: 1px;
        }
        .vip-current-level .level-label {
            font-size: 14px;
            color: #8aa4bb;
        }
        .vip-current-level .level-label strong {
            color: #eaeef3;
            font-size: 18px;
        }

        .vip-stats {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 10px;
            margin-top: 16px;
        }
        .vip-stat-item {
            background: rgba(14, 26, 38, 0.5);
            border-radius: 14px;
            padding: 12px 10px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.04);
        }
        .vip-stat-item .num {
            font-size: 18px;
            font-weight: 700;
            color: #d4af6e;
        }
        .vip-stat-item .lbl {
            font-size: 11px;
            color: #6b8aa3;
            margin-top: 2px;
        }

        /* ===== 升級進度 ===== */
        .upgrade-progress {
            margin-top: 14px;
            padding: 14px 16px;
            background: rgba(14, 26, 38, 0.5);
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.04);
        }
        .upgrade-progress .progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: #8aa4bb;
            margin-bottom: 6px;
        }
        .upgrade-progress .progress-label strong {
            color: #eaeef3;
        }
        .upgrade-progress .progress-bar {
            width: 100%;
            height: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 20px;
            overflow: hidden;
        }
        .upgrade-progress .progress-bar .fill {
            height: 100%;
            background: linear-gradient(90deg, #d4af6e, #e8c97a);
            border-radius: 20px;
            transition: width 0.5s ease;
        }
        .upgrade-progress .progress-hint {
            font-size: 12px;
            color: #6b8aa3;
            margin-top: 6px;
            text-align: center;
        }
        .upgrade-progress .progress-hint .highlight {
            color: #d4af6e;
            font-weight: 600;
        }

        /* ===== VIP等級列表 ===== */
        .vip-list-title {
            font-size: 17px;
            font-weight: 700;
            color: #eaeef3;
            margin: 18px 0 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .vip-list-title i {
            color: #d4af6e;
        }

        .vip-level-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(20, 33, 46, 0.6);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-radius: 18px;
            padding: 14px 18px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            margin-bottom: 10px;
            transition: 0.2s;
        }
        .vip-level-card.current {
            border-color: #d4af6e;
            background: rgba(212, 175, 110, 0.08);
        }
        .vip-level-card.locked {
            opacity: 0.5;
        }
        .vip-level-card .level-info {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .vip-level-card .level-tag {
            font-size: 16px;
            font-weight: 800;
            color: #d4af6e;
            min-width: 56px;
        }
        .vip-level-card .level-tag.current-tag {
            color: #e8c97a;
        }
        .vip-level-card .level-detail {
            display: flex;
            flex-direction: column;
        }
        .vip-level-card .level-detail .name {
            font-size: 14px;
            font-weight: 600;
            color: #eaeef3;
        }
        .vip-level-card .level-detail .desc {
            font-size: 12px;
            color: #8aa4bb;
        }
        .vip-level-card .level-requirement {
            text-align: right;
        }
        .vip-level-card .level-requirement .req {
            font-size: 13px;
            font-weight: 600;
            color: #b0ccdf;
        }
        .vip-level-card .level-requirement .status {
            font-size: 11px;
            color: #6b8aa3;
        }
        .vip-level-card .level-requirement .status.reached {
            color: #d4af6e;
        }
        .vip-level-card .level-requirement .status.current-status {
            color: #e8c97a;
            font-weight: 600;
        }

        /* ===== 底部菜單 ===== */
        .bottom-nav {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            display: flex;
            justify-content: space-around;
            align-items: center;
            background: rgba(14, 26, 38, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 10px 6px 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 0;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
            z-index: 100;
            max-width: 100%;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            font-size: 12px;
            color: #6f8aa0;
            transition: 0.2s;
            padding: 4px 12px;
            border-radius: 8px;
            cursor: pointer;
            background: transparent;
            min-width: 56px;
            text-decoration: none;
        }
        .nav-item i {
            font-size: 26px;
            margin-bottom: 2px;
        }
        .nav-item.active {
            color: #e0d5c0;
            font-weight: 600;
        }
        .nav-item.active i {
            color: #d4af6e;
        }
        .nav-item:hover {
            color: #e0d5c0;
        }

        /* ===== 響應式 ===== */
        @media (max-width: 480px) {
            .vip-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 6px;
            }
            .vip-stat-item .num {
                font-size: 15px;
            }
            .vip-current-level .level-badge {
                font-size: 16px;
                padding: 6px 14px;
            }
            .vip-level-card {
                padding: 12px 14px;
                flex-wrap: wrap;
                gap: 8px;
            }
            .vip-level-card .level-requirement {
                text-align: left;
                width: 100%;
                padding-left: 70px;
            }
            .nav-item {
                font-size: 11px;
                min-width: 44px;
                padding: 2px 8px;
            }
            .nav-item i {
                font-size: 22px;
            }
        }
        @media (min-width: 600px) {
            .app {
                max-width: 420px;
                margin: 0 auto;
            }
            .bottom-nav {
                max-width: 420px;
                left: 50%;
                transform: translateX(-50%);
            }
        }
        .bottom-spacer {
            height: 10px;
        }