/* css/style.css */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: url('../assets/images/bg.jpg') no-repeat center center fixed;
    background-size: cover;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    min-width: 100%; /* 确保导航栏宽度占满整个屏幕 */
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    max-width: 1400px; /* 增加最大宽度以容纳更多内容 */
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0; /* 防止logo在空间不足时被压缩 */
}

.logo img {
    width: 50px;
    /* height: 50px; */
    /* border-radius: 50%; */
    border: 3.4px solid #201e1e;
    
}

.logo h1 {
    font-size: 2rem;
    color: #d32f2f;
    text-decoration: none;
    font-family: 'Microsoft YaHei', 'SimHei', sans-serif; /* 独立字体样式 */
    white-space: nowrap; /* 防止标题文字换行 */
}

.nav {
    flex-shrink: 1; /* 允许导航在空间不足时适当收缩 */
    min-width: 0; /* 允许导航栏收缩 */
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 20px; /* 减小导航项之间的间距 */
    flex-wrap: nowrap; /* 防止导航项换行 */
    justify-content: flex-end; /* 导航项右对齐 */
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 1000;
    font-size: 1.2rem; /* 稍微减小字体大小以适应更多导航项 */
    transition: color 0.3s;
    white-space: nowrap; /* 防止链接文字换行 */
}

.nav a:hover,
.nav a.active {
    color: #d32f2f;
}

/* 按钮通用样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #d32f2f;
    color: white;
}

.btn-primary:hover {
    background-color: #b71c1c;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: #d32f2f;
    border: 2px solid #d32f2f;
}

.btn-secondary:hover {
    background-color: rgba(211, 47, 47, 0.1);
}

/* Footer */
.footer {
  background: #2c3e50;
  color: white;
  text-align: center;
  padding: 2rem 0;
}

/* 汉堡按钮样式 */
.menu-toggle {
    display: none; /* 默认隐藏，小屏幕才显示 */
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 101;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #333;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* 汉堡动画：激活状态 */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    transform-origin: top left;
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    transform-origin: bottom left;
}

/* 中等屏幕适配（最大宽度 1024px） */
@media (max-width: 1024px) {
    .nav ul {
        gap: 15px; /* 在中等屏幕上进一步减小导航项间距 */
    }
    
    .nav a {
        font-size: 1.1rem; /* 进一步减小字体大小 */
    }
    
    .header .container {
        max-width: 1200px;
    }
}

/* 小屏幕适配（最大宽度 768px） */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex; /* 手机端显示汉堡按钮 */
    }

    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.4s ease, opacity 0.4s ease;
        z-index: 99;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav ul {
        flex-direction: column;
        gap: 0;
        overflow: hidden;
    }

    .nav ul li {
        border-bottom: 1px solid #eee;
    }

    .nav a {
        display: block;
        padding: 15px 20px;
        font-size: 1.2rem;
    }

    .nav a:hover,
    .nav a.active {
        background-color: #f5f5f5;
        color: #d32f2f;
    }

    /* 容器自适应 */
    .header .container {
        padding: 0 15px;
    }

    .logo h1 {
        font-size: 1.6rem;
    }
    
    .header {
        min-width: 100%;
    }
}

/* 超小屏幕适配（最大宽度 480px） */
@media (max-width: 480px) {
    .header .container {
        padding: 0 10px;
    }
    
    .logo img {
        width: 40px;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .nav a {
        font-size: 1.1rem;
        padding: 12px 15px;
    }
}