:root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --accent-color: #2DD4BF;
    --secondary-color: #1F2937;
    --nav-height: 80px;
    --max-width: 1200px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
}

.navbar {
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    height: 50px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(45, 212, 191, 0.3));
    transition: filter 0.3s ease, transform 0.3s ease;
}

.logo img:hover {
    filter: drop-shadow(0 0 12px rgba(45, 212, 191, 0.5));
    transform: scale(1.05);
}

.logo-text {
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.logo:hover .logo-text {
    color: var(--accent-color);
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 2.5rem;
    font-size: 1rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.lang-switch {
    padding: 0.5rem 1rem;
    border: 1px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.9rem;
}

.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 2rem;
    max-width: 100%;
    margin: 0 auto;
    position: relative;
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero h1,
.hero p {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--accent-color);
}

.hero p {
    font-size: 1.5rem;
    opacity: 0.8;
    max-width: 600px;
}

.services {
    padding: 6rem 2rem;
    background: var(--secondary-color);
}

.services h2, .about h2, .contact h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--accent-color);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.service-card {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
    min-height: 3em;
    display: flex;
    align-items: flex-start;
    line-height: 1.4;
    margin-top: -0.8rem;
}

.service-card p {
    opacity: 0.8;
    font-size: 1.1rem;
    margin-top: 0;
    text-align: left;
    align-self: flex-start;
}

.about {
    padding: 6rem 2rem;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    font-size: 1.2rem;
    opacity: 0.8;
    line-height: 1.8;
}

.contact {
    padding: 6rem 2rem;
    background: var(--secondary-color);
}

.contact-links {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    gap: 2rem;
    align-items: center;
    justify-content: center;
}

.contact-button {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 3rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
    min-width: 300px;
    justify-content: center;
}

.email-button {
    background: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 4px 6px rgba(45, 212, 191, 0.1);
}

.email-button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(45, 212, 191, 0.2);
}

.twitter-button {
    background: #1DA1F2;  /* Twitter蓝色 */
    color: white;
    box-shadow: 0 4px 6px rgba(29, 161, 242, 0.1);
}

.twitter-button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(29, 161, 242, 0.2);
}

.contact-button i {
    font-size: 1.3rem;
}

footer {
    text-align: center;
    padding: 2rem;
    opacity: 0.6;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 0 1rem;
    }
    
    .contact-button {
        min-width: 250px;
        padding: 1rem 2rem;
    }
    
    .contact-links {
        flex-direction: column;
        gap: 1.5rem;
    }
}