* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 20px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2rem;
}


/* toast样式 */
.toast {
    position: fixed;
    top: 10px;
    right: 10px;
    background: #2ecc71;
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    display: none;
    z-index: 10;
    font-weight: 600;
}
/* 定义动画帧fadeInOut */
@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    10% {
        opacity: 1;
        transform: translateY(0);
    }
    90% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-20px);
    }
}
.toast.show {
    display: block;
    animation: fadeInOut 3s forwards;
}
.toast.error {
    background: #e74c3c;
}