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

:root {
    --bg-color: #0a0a0a;
    --text-color: #ffffff;
    --accent-color: #aa8c5e;
    --border-color: rgba(255, 255, 255, 0.2);
    --overlay-color: rgba(0, 0, 0, 0.75);
}

body {
    background: var(--bg-color) url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4MCIgaGVpZ2h0PSI4MCIgdmlld0JveD0iMCAwIDQwIDQwIj48cGF0aCBmaWxsPSIjMTUxNTE1IiBmaWxsLXJ1bGU9ImV2ZW5vZGQiIGQ9Ik0wIDBoNDB2NDBIMHoiLz48cGF0aCBmaWxsPSIjMjAyMDIwIiBkPSJNMjAgNUwxNSAxMGwxMCA1eiIvPjwvc3ZnPg==') repeat;
    background-size: 40px 40px;
    font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center; /* 保留基础居中 */
    border-bottom: 1px solid var(--border-color);
}

.logo-nav {
    height: 40px;
    width: auto;
    transform: translateY(4px); /* 把logo往下移2像素，视觉上正好居中 */
}

.nav-links {
    display: flex;
    gap: 3rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* 移动端导航 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    transform: translateY(1px); /* 把菜单按钮往下移1像素，和logo对齐 */
    line-height: 1; /* 消除字符自带的行高偏移 */
}

/* 通用容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 页面标题 */
.page-title {
    text-align: center;
    padding: 8rem 0 4rem;
}

.page-title h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.page-title .divider {
    width: 80px;
    height: 2px;
    background: var(--accent-color);
    margin: 0 auto;
}

/* 页脚样式 */
.footer {
    margin-top: 6rem;
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer .copyright {
    margin-bottom: 1rem;
}

.footer .contact-info {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.95);
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .page-title h1 {
        font-size: 2rem;
    }
}