* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", Arial, sans-serif;
}

:root {
    --blue: #0052cc;
    --gray-100: #f1f5f9;
    --primary-blue: #0070e0;
    --primary-hover: #005fc7;
    --border-light: #ddd;
    --text-dark: #333;
    --white: #fff;
    --red: red;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* 主标题动画：从下往上渐入 */
.banner-content h2 {
    font-size: 55px;
    opacity: 0;
    transform: translateY(40px);
    animation: slideUpFadeIn 0.8s ease forwards;
}

/* 副标题动画：延迟出现 */
.banner-content p {
    font-size: 25px;
    margin-top: 30px;
    opacity: 0;
    transform: translateY(40px);
    animation: slideUpFadeIn 0.8s ease 0.4s forwards;
}

@keyframes slideUpFadeIn {
    0% {
        opacity: 0;
        transform: translateY(100px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}