@font-face {
    font-family: 'JiYingHuiPianYuan';
    src: url('../JiYingHuiPianYuan.ttf') format('truetype');
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'JiYingHuiPianYuan', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background-color: #fff;
}

.section {
    width: 100%;
    position: relative;
    background-position: center top;
    background-repeat: no-repeat;
    background-size: cover;
    overflow: hidden;
}

/* Section 1 - 固定高度 540px */
.section-1 {
    width: 100%;
    height: 540px;
    margin-top: 100px; /* Account for fixed header */
}

/* Section 2 - 初始高度 1310px，可自适应展开 */
.section-2 {
    width: 100%;
    min-height: 1310px;
    height: auto;
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
}

/* Section 3 - 固定高度 410px */
.section-3 {
    width: 100%;
    height: 410px;
}

/* Content Containers */
.section-1-content,
.section-2-content,
.section-3-content {
    width: 100%;
    max-width: 1920px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

/* Responsive */
@media screen and (max-width: 1920px) {
    .section-1 {
        height: 28.125vw; /* 540/1920 */
        margin-top: 5.2vw; /* Account for fixed header */
    }
    
    .section-2 {
        min-height: 68.23vw; /* 1310/1920 */
    }
    
    .section-3 {
        height: 21.35vw; /* 410/1920 */
    }
}

@media screen and (min-width: 1920px) {
    .section-1 {
        margin-top: 100px;
    }
}