:root {
    --primary: #6e44ff;
    --secondary: #b892ff;
    --accent: #ff44a8;
    --dark: #121212;
    --darker: #020200;
    --light: #f8f9fa;
    --gray: #2d2d2d;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--darker);
    color: var(--light);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--secondary);
    transition: var(--transition);
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(110, 68, 255, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(110, 68, 255, 0.5);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--light);
}

.logo span {
    color: var(--primary);
}

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

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--light);
    font-weight: 500;
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

/* 语言切换器样式 */
.language-switcher {
    position: relative;
    display: inline-block;
    margin-left: 20px;
}

.language-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--light);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--dark);
    border-radius: 10px;
    padding: 10px 0;
    min-width: 120px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    display: none;
    z-index: 1001;
}

.language-dropdown.active {
    display: block;
}

.language-option {
    padding: 8px 15px;
    cursor: pointer;
    transition: var(--transition);
}

.language-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.language-option.active {
    color: var(--primary);
    font-weight: bold;
}

/* 邮箱显示样式 */
.social-display {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    background: var(--gray);
    border-radius: 50%;
    color: var(--light);
    cursor: pointer;
    transition: var(--transition);
}

.social-display:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.social-display.active {
    background: var(--primary);
}

.social-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--light);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 100;
    margin-bottom: 10px;
}

.social-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--dark);
}

.social-display:hover .social-tooltip,
.social-display.active .social-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 5s infinite alternate;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #ccc;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.hero-image {
    margin-top: 50px;
    position: relative;
}

.hero-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Features Section */
.features {
    padding: 100px 0;
    background-color: var(--dark);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--light);
}

.section-title p {
    color: #aaa;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
    padding: 30px;
    border-radius: 15px;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* Projects Section */
.projects {
    padding: 100px 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--gray);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-img {
    height: 200px;
    background: linear-gradient(135deg, #3a1c71, #d76d77, #ffaf7b);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.project-content {
    padding: 20px;
}

.project-content h3 {
    margin-bottom: 10px;
}

.project-content p {
    color: #aaa;
    margin-bottom: 15px;
}

/* Footer */
footer {
    background-color: var(--dark);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--light);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-links a {
    color: #aaa;
}

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gray);
    border-radius: 50%;
    color: var(--light);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
}

/* Animations */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 100% 50%;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Team Section */
.team {
    padding: 100px 0;
    background-color: var(--dark);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.member-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 5px solid var(--gray);
}

.member-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-member h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.role {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 15px;
}

.bio {
    color: #aaa;
    margin-bottom: 20px;
}

.team-member .social-links {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.team-member .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    background: var(--gray);
    border-radius: 50%;
    color: var(--light);
    transition: var(--transition);
}

.team-member .social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--darker);
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }

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

    .nav-links li {
        margin: 10px 0;
    }

    .hamburger {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .features-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .language-switcher {
        margin-left: 0;
        margin-top: 15px;
    }

    .language-dropdown {
        right: auto;
        left: 0;
    }

    .social-tooltip {
        left: 0;
        transform: none;
    }

    .social-tooltip::after {
        left: 20px;
    }
}