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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
}

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

.site-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
    border-bottom: 1px solid #e8ecef;
}

.header-top {
    background: var(--color-dark);
    padding: 8px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

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

.header-info {
    display: flex;
    gap: 20px;
}

.header-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.header-social {
    display: flex;
    gap: 12px;
}

.header-social a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

.header-social a:hover {
    color: #fff;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
}

.brand-block {
    flex-shrink: 0;
}

.brand-mark {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo img {
    height: 52px;
    width: auto;
    display: block;
    transition: transform 0.3s ease;
}

.brand-mark:hover .brand-logo img {
    transform: scale(1.05);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1;
    margin-bottom: 4px;
}

.brand-slogan {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 5px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links > li {
    margin: 0;
    position: relative;
}

.nav-links > li > a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 12px 20px;
    display: block;
    border-radius: 8px;
    position: relative;
}

.nav-links > li > a::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    transition: transform 0.3s ease;
}

.nav-links > li > a:hover {
    color: var(--primary-color);
    background: rgba(145, 151, 255, 0.12);
}

.nav-links > li > a:hover::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 8px 0;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
    margin: 0;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    padding: 10px 20px;
    display: block;
    transition: all 0.3s ease;
}

.dropdown-menu a:hover {
    background: rgba(145, 151, 255, 0.16);
    color: var(--primary-color);
    padding-left: 25px;
}

.nav-cta {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 10px 22px;
    border-radius: 25px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn.ghost {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn.ghost:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(145, 151, 255, 0.3);
}

.btn.solid {
    background: var(--primary-color);
    color: #fff;
    border-color: transparent;
}

.btn.solid:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(145, 151, 255, 0.3);
}

@media (max-width: 992px) {
    .header-inner {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .nav-links a {
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .brand-logo img {
        height: 45px;
    }
    
    .nav-links {
        gap: 10px;
    }
    
    .nav-links a {
        font-size: 13px;
        padding: 6px 0;
    }
    
    .btn {
        padding: 8px 18px;
        font-size: 13px;
    }
}