/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 414px;
    margin: 0 auto;
    min-height: 100vh;
    background: #fff;
    position: relative;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.logo {
    position: relative;
    z-index: 1;
}

.logo-icon {
    font-size: 48px;
    margin-bottom: 10px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 300;
}

/* 主要内容区域 */
.main-content {
    padding: 30px 20px;
}

/* 应用信息卡片 */
.app-card {
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.app-icon {
    font-size: 48px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.app-info h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #333;
}

.version {
    font-size: 12px;
    color: #666;
    margin-bottom: 8px;
    background: #f0f0f0;
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-block;
}

.description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

/* 下载按钮区域 */
.download-section {
    text-align: center;
    margin-bottom: 40px;
}

.download-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50px;
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 0 auto 15px;
    min-width: 200px;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-btn::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;
}

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

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.6);
}

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

.btn-icon {
    font-size: 20px;
}

.download-tip {
    font-size: 14px;
    color: #666;
    margin: 0 0 15px 0;
}

/* iOS教程按钮 */
.ios-tutorial-btn {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    border-radius: 50px;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 auto;
    min-width: 180px;
    transition: all 0.3s ease;
}

.ios-tutorial-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.ios-tutorial-btn:active {
    transform: translateY(0);
}

.ios-tutorial-btn .btn-icon {
    font-size: 18px;
}

/* 功能特色 */
.features {
    margin-bottom: 30px;
}

.features h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
    text-align: center;
}

.feature-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.feature-item {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-item:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 24px;
    display: block;
    margin-bottom: 8px;
}

.feature-item span:last-child {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

/* 微信提示弹窗 */
.wechat-tip {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.wechat-tip.hidden {
    display: none;
}

.tip-content {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    max-width: 350px;
    width: 100%;
    animation: slideIn 0.5s ease;
    box-shadow: 0 20px 60px rgba(255, 107, 107, 0.4);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.tip-icon {
    font-size: 60px;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.tip-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.tip-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 20px;
    font-weight: 500;
}

.tip-note {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
    margin-top: 15px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.highlight {
    background: rgba(255, 255, 255, 0.3);
    color: white;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 18px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* 底部信息 */
.footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    border-top: 1px solid #e9ecef;
}

.footer p {
    font-size: 12px;
    color: #666;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 375px) {
    .container {
        max-width: 100%;
    }
    
    .header {
        padding: 30px 15px 25px;
    }
    
    .main-content {
        padding: 25px 15px;
    }
    
    .app-card {
        padding: 15px;
    }
    
    .download-btn {
        padding: 14px 35px;
        font-size: 16px;
        min-width: 180px;
    }
    
    .feature-list {
        gap: 10px;
    }
    
    .feature-item {
        padding: 12px;
    }
}

/* 加载动画 */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}