/* 全局样式重置与基础配置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

/* 核心：禁止滚动 + 满屏显示 */
html, body {
    height: 100%;
    overflow: hidden; /* 禁止页面滚动 */
    background: #fff;
    color: #333;
    line-height: 1.6;
}

/* 容器：100%高度居中 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 10;
}

/* 全屏背景：铺满屏幕，不滚动 */
.page-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

/* 头部导航 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    flex-shrink: 0;
}

.logo img {
    height: 50px;
    width: auto;
}

nav {
    display: flex;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    padding: 8px 30px;
    border-radius: 20px;
    transition: all 0.3s ease;
	font-weight: bold;
}

nav a.active,
nav a:hover {
    background-color: #ff9f33;
    color: #fff;
}

/* 主内容：自动占满剩余高度，垂直居中 */
.main-content {
    flex: 1;
    display: flex;
    align-items: flex-start;
    padding: 0;
}

/* 文字内容 中间偏上 + 自适应屏幕 */
.text-content {
    max-width: 70%;
    margin-top: 24vh; /* 核心：自适应屏幕高度的偏上间距 */
}

.text-about {
    max-width: 70%;
    margin-top: 12vh;
}

.text-content .sub-title {
    /*font-size: 30px;*/
	font-size: 22px;
    color: #ff9f33;
    margin-bottom: 4px;
}

.text-content .sub-title span{font-weight: bold;font-size: 34px;}

.text-content .main-title {
    font-size: 52px;
    font-weight: bold;
    margin-bottom: 20px;
    line-height: 1.2;
}

.text-content .main-title span {
    color: #f4802b;
}

.btn {
    display: inline-block;
    padding: 10px 44px;
    background-color: #ff9f33;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 18px;
    transition: background-color 0.3s ease;
	font-weight: bold;
}

.btn:hover {
    background-color: #e88a1a;
}

footer {
    text-align: left;
    padding: 0;
    font-size: 14px;
    color: #0e1d4d;
    position:absolute;
    left: 40px;
    bottom: 40px;
    z-index: 20;
}

/* 响应式适配 */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        padding: 20px 0;
    }
    nav {
        gap: 10px;
    }
    .main-content {
        text-align: center;
        padding: 0;
    }
    .text-content {
        max-width: 100%;
        margin-top: 12vh; /* 移动端自适应偏上 */
    }
    .text-content .main-title {
        font-size: 28px;
    }
}

/* 内容样式 */
.about-desc, .contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.about-desc p, .contact-info p {
    font-size: 18px;
    color: #555;
    line-height: 1.6;
	font-weight: 500;
}
.contact-info p strong {
    min-width: 80px;
    display: inline-block;
}