/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
    background-color: #0a0a0a;
    color: #ffffff;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: rgba(0, 0, 0, 0.8);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #ff00cc, #3333ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lang-btn {
    background: transparent;
    border: 1px solid #fff;
    color: #fff;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
}

.lang-btn:hover {
    background: #fff;
    color: #000;
}

/* Hero 区域 */
.hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a2e 0%, #000000 100%);
    padding: 0 20px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 0.5rem;
}

.hero h2 {
    font-size: 2rem;
    color: #aaa;
    margin-bottom: 2rem;
    letter-spacing: 5px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 3rem auto;
    color: #ddd;
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    background: linear-gradient(45deg, #ff00cc, #3333ff);
    color: white;
    text-decoration: none;
    font-weight: bold;
    border-radius: 50px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 20px rgba(255, 0, 204, 0.5);
}

/* 特性区域 */
.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 5rem 5%;
    background-color: #111;
}

.feature-item {
    flex: 1;
    min-width: 250px;
    margin: 1rem;
    padding: 2rem;
    background: #1a1a1a;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #333;
}

.feature-item h3 {
    color: #ff00cc;
    margin-bottom: 1rem;
}

/* 底部 */
footer {
    text-align: center;
    padding: 3rem 0;
    color: #666;
    font-size: 0.9rem;
    border-top: 1px solid #222;
}

.beian a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.beian a:hover {
    color: #fff;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero h2 { font-size: 1.5rem; }
    .features { flex-direction: column; }
}