/* 确保header在最前面 */
header {
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.2rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    font-size: 2.2rem;
    color: var(--secondary);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

nav ul li a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    transition: var(--transition);
}

nav ul li a:hover,
nav ul li a.active {
    background: var(--glass-highlight);
    box-shadow: 0 0 15px rgba(108, 99, 255, 0.3);
}

/* 页面头部 */
.page-header {
    padding: 3rem 0 2rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.page-header h1 i {
    color: var(--secondary);
}

.page-header p {
    font-size: 1.2rem;
    color: #ccc;
}

/* 首页布局 */
.hero {
    position: relative;
    z-index: 2;
    padding: 4rem 0;
    text-align: center;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* 内容网格 */
.content-grid {
    display: grid;
    gap: 2rem;
    margin: 2rem 0;
}

/* 搜索容器 */
.search-container {
    margin: 2rem 0;
}

/* 设备网格 */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}