* { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
            background: linear-gradient(180deg, #181A20 0%, #0F1115 100%);
            color: #EAECEF;
            line-height: 1.6;
            min-height: 100vh;
        }
        
        .container {
            max-width: 375px;
            margin: 0 auto;
            padding: 0 16px 32px;
        }
        
        /* Hero Section */
        .hero {
            text-align: center;
            padding: 32px 0 24px;
            background: linear-gradient(180deg, rgba(252,213,53,0.08) 0%, transparent 100%);
            margin: 0 -16px 24px;
            padding-left: 16px;
            padding-right: 16px;
        }
        
        .hero-logo {
            width: 100px;
            height: 100px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 8px 32px rgba(252,213,53,0.25);
            background: #ffffff;
        }
        
        .hero-logo img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .hero h1 {
            font-size: 24px;
            font-weight: 700;
            color: #FCD535;
            margin-bottom: 8px;
        }
        
        .hero p {
            font-size: 13px;
            color: #8A8B8E;
            padding: 0 20px;
        }
        
        /* Section */
        .section {
            margin-bottom: 28px;
        }
        
        .section-title {
            font-size: 17px;
            font-weight: 600;
            color: #EAECEF;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .section-title .icon {
            font-size: 20px;
        }
        
        /* Exchange Card */
        .exchange-group {
            margin-bottom: 24px;
        }
        
        .exchange-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            padding: 0 4px;
        }
        
        .exchange-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
        }
        
        .exchange-logo img {
            width: 100%;
            height: 100%;
            border-radius: 10px;
        }
        
        .exchange-logo-img {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            object-fit: contain;
            background: transparent;
            flex-shrink: 0;
        }
        
        .exchange-name {
            font-size: 16px;
            font-weight: 600;
            color: #EAECEF;
        }
        
        .exchange-order {
            font-size: 11px;
            color: #8A8B8E;
            margin-left: auto;
        }
        
        /* Card */
        .card {
            background: #1E2028;
            border-radius: 14px;
            padding: 16px;
            margin-bottom: 10px;
            border: 1px solid rgba(255,255,255,0.04);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .card:active {
            transform: scale(0.98);
        }
        
        .card-header {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
        }
        
        .card-title {
            font-size: 15px;
            font-weight: 600;
            color: #EAECEF;
        }
        
        .badge {
            font-size: 10px;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
            flex-shrink: 0;
        }
        
        .badge.hot {
            background: rgba(252,213,53,0.15);
            color: #FCD535;
        }
        
        .badge.recommend {
            background: rgba(76,175,80,0.15);
            color: #66BB6A;
        }
        
        .badge.rebate {
            background: rgba(255,152,0,0.15);
            color: #FF9800;
        }
        
        .card-content {
            font-size: 13px;
            color: #8A8B8E;
            margin-bottom: 14px;
            line-height: 1.5;
        }
        
        .card-btn {
            display: block;
            width: 100%;
            padding: 10px 0;
            border-radius: 10px;
            border: none;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            text-align: center;
            text-decoration: none;
            transition: opacity 0.2s;
        }
        
        .card-btn:active { opacity: 0.7; }
        
        .btn-binance { background: #FCD535; color: #181A20; }
        .btn-okx { background: #ffffff; color: #181A20; }
        .btn-bybit { background: #F7931A; color: #ffffff; }
        .btn-bitget { background: #1E1E3F; color: #ffffff; border: 1px solid rgba(255,255,255,0.1); }
        
        .invite-row {
            display: flex;
            gap: 8px;
            margin-top: 10px;
        }
        
        .invite-code {
            flex: 1;
            background: #181A20;
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 13px;
            color: #FCD535;
            font-weight: 600;
            letter-spacing: 1px;
            text-align: center;
            font-family: monospace;
        }
        
        .copy-btn {
            padding: 8px 14px;
            background: rgba(252,213,53,0.12);
            border: 1px solid rgba(252,213,53,0.25);
            border-radius: 8px;
            color: #FCD535;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
            transition: background 0.2s;
        }
        
        .copy-btn:active { background: rgba(252,213,53,0.25); }
        
        /* Features */
        .features {
            background: #181A20;
            border-radius: 10px;
            padding: 12px;
            margin-top: 10px;
        }
        
        .feature-item {
            font-size: 12px;
            color: #8A8B8E;
            padding: 4px 0;
            display: flex;
            align-items: flex-start;
            gap: 6px;
        }
        
        .feature-item::before {
            content: "✅";
            flex-shrink: 0;
        }
        
        .warning-item {
            font-size: 12px;
            color: #FF9800;
            padding: 4px 0;
            display: flex;
            align-items: flex-start;
            gap: 6px;
        }
        
        /* Tutorial */
        .tutorial-card {
            background: #1E2028;
            border-radius: 14px;
            padding: 14px 16px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
            border: 1px solid rgba(255,255,255,0.04);
            text-decoration: none;
            color: inherit;
            transition: transform 0.2s;
        }
        
        .tutorial-card:active { transform: scale(0.98); }
        
        .tutorial-icon {
            font-size: 28px;
            flex-shrink: 0;
        }
        
        .tutorial-body {
            flex: 1;
        }
        
        .tutorial-title {
            font-size: 14px;
            font-weight: 600;
            color: #EAECEF;
            margin-bottom: 2px;
        }
        
        .tutorial-desc {
            font-size: 12px;
            color: #8A8B8E;
        }
        
        .tutorial-arrow {
            color: #8A8B8E;
            font-size: 14px;
        }
        
        /* Contact */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        
        .contact-card {
            background: #1E2028;
            border-radius: 12px;
            padding: 14px;
            text-align: center;
            text-decoration: none;
            color: inherit;
            border: 1px solid rgba(255,255,255,0.04);
            transition: transform 0.2s;
        }
        
        .contact-card:active { transform: scale(0.96); }
        
        .contact-icon {
            font-size: 24px;
            margin-bottom: 6px;
        }
        
        .contact-label {
            font-size: 12px;
            color: #8A8B8E;
        }
        
        .contact-value {
            font-size: 13px;
            color: #EAECEF;
            font-weight: 500;
            margin-top: 2px;
        }
        
        /* Footer */
        .footer {
            text-align: center;
            padding: 24px 0 16px;
            color: #5E6066;
            font-size: 12px;
        }
        
        /* VIP Modal */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }
        
        .modal-overlay.active { display: flex; }
        
        .modal {
            background: #1E2028;
            border-radius: 20px;
            padding: 28px 24px;
            width: 300px;
            text-align: center;
        }
        
        .modal h3 {
            font-size: 17px;
            color: #EAECEF;
            margin-bottom: 16px;
        }
        
        .modal input {
            width: 100%;
            padding: 12px 14px;
            background: #181A20;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 10px;
            color: #EAECEF;
            font-size: 15px;
            text-align: center;
            outline: none;
            margin-bottom: 16px;
        }
        
        .modal input:focus { border-color: #FCD535; }
        
        .modal-btn {
            width: 100%;
            padding: 12px;
            background: #FCD535;
            color: #181A20;
            border: none;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
        }
        
        .modal-error {
            color: #EF5350;
            font-size: 12px;
            margin-top: 10px;
            display: none;
        }
        
        .modal-error.show { display: block; }
        
        /* Toast */
        .toast {
            position: fixed;
            bottom: 60px;
            left: 50%;
            transform: translateX(-50%) translateY(20px);
            background: #2D2D3F;
            color: #EAECEF;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 13px;
            opacity: 0;
            transition: opacity 0.3s, transform 0.3s;
            z-index: 999;
            pointer-events: none;
        }
        
        .toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }
        
        /* Welcome Popup */
        /* APP Collection Grid */
        .app-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        
        @media (max-width: 360px) {
            .app-grid {
                grid-template-columns: 1fr;
            }
        }
        
        .app-card {
            background: #1E2028;
            border-radius: 12px;
            padding: 14px;
            border: 1px solid rgba(255,255,255,0.06);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .app-card:active {
            transform: scale(0.97);
        }
        
        .app-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(255,255,255,0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 10px;
        }
        
        .app-card-icon img {
            width: 100%;
            height: 100%;
            border-radius: 10px;
            object-fit: cover;
        }
        
        .app-card-name {
            font-size: 14px;
            font-weight: 600;
            color: #EAECEF;
            margin-bottom: 3px;
            line-height: 1.3;
        }
        
        .app-card-desc {
            font-size: 11px;
            color: #8A8B8E;
            margin-bottom: 10px;
            line-height: 1.3;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        
        .app-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .app-card-version {
            font-size: 11px;
            color: #C0C0C0;
        }
        
        .app-card-size {
            font-size: 10px;
            color: #8A8B8E;
        }
        
        .app-card-btn {
            padding: 6px 14px;
            border-radius: 6px;
            border: none;
            background: #FCD535;
            color: #181A20;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            transition: opacity 0.2s;
        }
        
        .app-card-btn:active { opacity: 0.7; }
        
        .welcome-overlay {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.85);
            z-index: 2000;
            display: none;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.3s ease;
        }
        
        .welcome-overlay.active { display: flex; }
        
        .welcome-modal {
            background: #1E2028;
            border-radius: 20px;
            padding: 0;
            width: 340px;
            max-height: 80vh;
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(252,213,53,0.2);
            animation: scaleIn 0.3s ease;
        }
        
        .welcome-close {
            position: absolute;
            top: 12px;
            right: 12px;
            background: rgba(0,0,0,0.5);
            color: #fff;
            border: none;
            border-radius: 50%;
            width: 32px;
            height: 32px;
            font-size: 16px;
            cursor: pointer;
            z-index: 10;
        }
        
        .welcome-content {
            padding: 20px;
            text-align: center;
        }
        
        .welcome-content img {
            width: 100%;
            border-radius: 12px;
            margin-bottom: 16px;
        }
        
        .welcome-content video {
            width: 100%;
            border-radius: 12px;
            margin-bottom: 16px;
        }
        
        .welcome-content .welcome-text {
            font-size: 15px;
            color: #EAECEF;
            line-height: 1.6;
            padding: 12px 0;
        }
        
        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
        @keyframes scaleIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }