/* 自定义样式 */
:root {
    --app-primary: #0066ff;
    --app-secondary: #f5f5f7;
    --app-accent: #ff2d55;
    --app-dark: #1c1c1e;
    --app-light: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* iPhone 15 样式 */
.iphone-frame {
    border-radius: 40px;
    border: 1px solid #e0e0e0;
    background-color: var(--app-light);
    overflow: hidden;
}

.notch {
    background-color: #000;
    z-index: 1000;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 3px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--app-primary);
    color: white;
    border-radius: 12px;
    padding: 12px 20px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.2);
}

/* 卡片样式 */
.card {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
}

/* 导航栏激活状态 */
.nav-item {
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-item:active {
    transform: scale(0.95);
}

/* 3D悬浮效果 */
.hover-3d {
    transition: transform 0.3s ease;
}

.hover-3d:hover {
    transform: translateY(-5px) rotateX(5deg);
}