:root {
    --primary: #0d9488;
    --primary-light: #5eead4;
    --primary-dark: #0f766e;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --bg-light: #f0fdfa;
    --bg-gradient: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 50%, #f0f9ff 100%);
    --text-dark: #134e4a;
    --text-light: #5eead4;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(13, 148, 136, 0.15);
    --shadow-hover: 0 20px 60px rgba(13, 148, 136, 0.25);
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(13, 148, 136, 0.1);
    transition: all 0.3s ease;
    padding: 0 20px;
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: '黑体', serif;
    font-size: 1.4rem;
    color: var(--primary-dark);
    font-weight: 700;
    text-decoration: none;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    width: 50px;
    height: 50px;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    padding: 8px 0;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    transition: width 0.3s ease;
}

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

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

.nav-links a.active {
    color: var(--primary);
}

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

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #134e4a 0%, #0f766e 100%);
    padding: 60px 5% 30px;
    color: white;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    font-family: '黑体', serif;
    font-size: 1.8rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-logo img {
    width: 50px;
    height: 50px;
    margin-right: 10px;
}

.footer-slogan {
    font-size: 1.2rem;
    color: #5eead4;
    margin-bottom: 30px;
}

.footer-info {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-bottom {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* 动画 */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 5%;
        gap: 5px;
        border-bottom: 1px solid rgba(13, 148, 136, 0.1);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

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

    .nav-links a {
        padding: 12px 16px;
        border-radius: 10px;
        font-size: 1rem;
    }

    .nav-links a:hover {
        background: var(--bg-light);
    }

    .menu-toggle {
        display: flex;
    }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}