:root {
    --primary-color: #007AFF;
    --secondary-color: #0040FF;
    --text-color: #1a1a1a;
    --bg-color: #f8f9fa;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

body {
    background: var(--bg-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

.app-card {
    background: white;
    border-radius: 18px;
    box-shadow: 0 12px 24px var(--shadow-color);
    padding: 120px 40px 220px;

    width: 75vw;

    max-width: 600px;
    text-align: center;
    transition: transform 0.3s ease;
    margin-top: 20px;
}

.app-card:hover {
    /*transform: translateY(-4px);*/
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    margin: 0 auto 30px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    background: var(--primary-color) center/cover no-repeat;
}

.app-name {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
}

.version-info {
    color: #666;
    font-size: 16px;
    margin-bottom: 30px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    font-size: 18px;
    font-weight: 500;
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
}

.download-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.35);
}

.download-btn:active {
    transform: scale(0.98);
}

.file-size {
    color: #888;
    font-size: 14px;
    margin-top: 15px;
    display: block;
}

/* 微信遮罩层 */
.wx-mask {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    z-index: 999;
}

/* 微信指引箭头 */
.guide-arrow {
    position: fixed;
    top: 0;
    right: 16px;
    animation: arrowPulse 0.8s infinite;
}

.guide-arrow::before {
    content: '';
    position: fixed;
    top: 18px;
    right: 0;
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    border-bottom: 20px solid #fff;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* 动画 */
@keyframes arrowPulse {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.tip-text {
    position: fixed;
    top: 30px;
    right: 15px;
    color: #fff;
    text-align: right;
    font-size: 18px;
    line-height: 1.5;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.1);
    padding: 12px;
    border-radius: 8px;
}