* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    background: #0f0f1e;
}

.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.background-gradient {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(circle at 30% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(237, 100, 166, 0.1) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(-10%, -10%) rotate(180deg);
    }
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.download-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-radius: 30px;
    padding: 50px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    animation: cardFadeIn 0.6s ease;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.icon-container {
    margin-bottom: 30px;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.app-icon {
    width: 120px;
    height: 120px;
    filter: drop-shadow(0 10px 30px rgba(102, 126, 234, 0.5));
}

.app-title {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.app-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 30px;
    word-break: break-all;
    padding: 0 10px;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 35px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.info-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-value {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
}

.download-button {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 15px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.download-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.download-button:hover::before {
    left: 100%;
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
}

.download-button:active {
    transform: translateY(0);
}

.download-button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.button-icon {
    width: 24px;
    height: 24px;
}

.progress-container {
    margin-top: 25px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.6);
}

.progress-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.tips {
    margin-top: 35px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tips p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
}

.footer p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 0.5px;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .download-card {
        padding: 40px 25px;
        border-radius: 25px;
    }

    .app-title {
        font-size: 24px;
    }

    .app-icon {
        width: 100px;
        height: 100px;
    }

    .download-info {
        gap: 25px;
    }

    .download-button {
        font-size: 16px;
        padding: 16px;
    }

    .tips {
        font-size: 13px;
    }
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    body {
        background: #0f0f1e;
    }
}

/* 动画性能优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}