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

body {
    background-color: #000;
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 浮动导航栏 */
.floating-nav {
    position: fixed;
    top: 20px;
    width: 80%;
    background: rgba(35, 35, 40, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 50px;
    padding: 14px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
    z-index: 1000;
    border: 1px solid rgba(100, 100, 100, 0.15);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    background: linear-gradient(to right, #00ffcc, #00ccff, #cc00ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    padding: 0 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 10px 17px;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background: rgba(100, 100, 100, 0.3);
    color: #fff;
}

/* 主内容区 */
.hero {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 80px;
    position: relative;
}

/* 动态标题 */
.hero-title {
    font-size: 5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    max-width: 900px;
}

.welcome-text {
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    letter-spacing: 2px;
    display: block;
}

.bopid-text {
    background: linear-gradient(-45deg, 
        #00ffcc, 
        #00ccff, 
        #cc00ff, 
        #ff00cc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 300% 300%;
    animation: colorFlow 8s ease infinite;
}

/* 按钮容器 */
.btn-container {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    max-width: 900px;
}

.main-btn {
    width: 180px;
    height: 180px;
    border-radius: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    background: rgba(30, 30, 35, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(90, 90, 120, 0.2);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.main-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 255, 204, 0.1), 
        rgba(0, 204, 255, 0.1), 
        rgba(204, 0, 255, 0.1));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.main-btn:hover {
    transform: translateY(-15px) scale(1.05);
    box-shadow: 0 25px 40px rgba(0, 0, 0, 0.6);
}

.main-btn:hover::before {
    opacity: 1;
}

.btn-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.btn-1 .btn-icon { color: #00ccff; }
.btn-2 .btn-icon { color: #cc00ff; }
.btn-3 .btn-icon { color: #00ffcc; }
.btn-4 .btn-icon { color: #00b3ff; }
.btn-5 .btn-icon { color: #ff00ee; }
.btn-6 .btn-icon { color: #00ff88; }
.btn-7 .btn-icon { color: #00c3ff; }
.btn-8 .btn-icon { color: #8800ff; }

.btn-text {
    font-size: 1.8rem;
    font-weight: 600;
    color: #fff;
}

/* 动画效果 */
@keyframes colorFlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 背景装饰 */
.bg-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -2;
}

.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.15;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: #cc00ff;
    top: 20%;
    left: 10%;
}

.circle-2 {
    width: 350px;
    height: 350px;
    background: #00ccff;
    bottom: 15%;
    right: 20%;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: #00ffcc;
    top: 50%;
    right: 10%;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .btn-container {
        gap: 40px;
    }
    
    .main-btn {
        width: 150px;
        height: 150px;
    }
    
    .btn-icon {
        font-size: 2.8rem;
    }
    
    .btn-text {
        font-size: 1.5rem;
    }
}

@media (max-width: 600px) {
    .floating-nav {
        top: 10px;
        width: 95%;
        padding: 12px 15px;
    }
    
    .logo {
        font-size: 1.4rem;
    }
    
    .nav-links {
        gap: 12px;
    }
    
    .nav-links a {
        font-size: 0.95rem;
        padding: 6px 10px;
    }
    
    .hero-title {
        font-size: 2.8rem;
        margin-bottom: 60px;
    }
    
    .btn-container {
        gap: 30px;
    }
    
    .main-btn {
        width: 130px;
        height: 130px;
    }
    
    .btn-icon {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }
    
    .btn-text {
        font-size: 1.3rem;
    }
}