/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    background: #1a1a1a;
    color: #fff;
    overflow-x: hidden;
}

/* 通用标题样式 */
.section-title {
    font-size: 32px;
    text-align: center;
    margin: 40px 0;
    font-weight: normal;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: #c59c5f;
    margin: 10px auto;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: transform 0.3s;
}

.header--hidden {
    transform: translateY(-100%);
}

.header__logo {
    position: absolute;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
}

.header__logo img {
    height: 40px;
    width: auto;
}

.header__nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header__nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 40px;
}

.nav__item {
    position: relative;
}

.nav__link {
    color: #fff;
    text-decoration: none;
    padding: 10px 0;
    font-size: 18px;
    transition: color 0.3s;
    display: block;
}

.nav__link:hover {
    color: #c59c5f;
}

.nav__submenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(10px);
    min-width: 150px;
    padding: 10px 0;
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    transform-origin: top center;
    transform: translateX(-50%) scaleY(0.8);
}

.nav__item:hover .nav__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scaleY(1);
}

.nav__submenu a {
    display: block;
    padding: 8px 20px;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
    text-align: center;
}

.nav__submenu a:hover {
    color: #c59c5f;
    background: rgba(197,156,95,0.1);
}

/* 页脚样式 */
.footer {
    background: #000;
    padding: 60px 0 30px;
    margin-top: 100px;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer__column h4 {
    color: #c59c5f;
    margin-bottom: 20px;
    font-size: 18px;
}

.footer__column a {
    display: block;
    color: #999;
    text-decoration: none;
    margin: 10px 0;
    transition: color 0.3s;
}

.footer__column a:hover {
    color: #fff;
}

.footer__copyright {
    text-align: center;
    color: #666;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #333;
}