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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    width: 100vw;
    position: relative;
    background: #0a0e27;
}

/* 基础星空背景 */
.stars-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at top, #1a1f3a 0%, #0a0e27 50%, #000000 100%),
        linear-gradient(to bottom, #0a0e27 0%, #000000 100%);
    z-index: 1;
}

/* 多层星星效果 */
.stars-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    overflow: hidden;
}

.stars-layer-1 {
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(2px 2px at 90% 40%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 33% 60%, rgba(255, 255, 255, 0.7), transparent),
        radial-gradient(1px 1px at 55% 80%, rgba(255, 255, 255, 0.7), transparent),
        radial-gradient(2px 2px at 15% 80%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 75% 20%, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(2px 2px at 40% 10%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 65% 45%, rgba(255, 255, 255, 0.7), transparent),
        radial-gradient(2px 2px at 25% 90%, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 85% 65%, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(2px 2px at 10% 40%, rgba(255, 255, 255, 0.9), transparent);
    background-size: 200% 200%;
    background-repeat: repeat;
    animation: twinkle 8s ease-in-out infinite, drift 120s linear infinite;
    opacity: 0.9;
}

.stars-layer-2 {
    background-image: 
        radial-gradient(1px 1px at 25% 25%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(1px 1px at 45% 45%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(2px 2px at 65% 65%, rgba(125, 195, 255, 0.9), transparent),
        radial-gradient(1px 1px at 85% 85%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(1px 1px at 10% 50%, rgba(125, 195, 255, 0.7), transparent),
        radial-gradient(2px 2px at 30% 70%, rgba(125, 195, 255, 0.9), transparent),
        radial-gradient(1px 1px at 50% 30%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(1px 1px at 70% 50%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(2px 2px at 90% 70%, rgba(125, 195, 255, 0.9), transparent),
        radial-gradient(1px 1px at 20% 90%, rgba(125, 195, 255, 0.7), transparent),
        radial-gradient(1px 1px at 35% 15%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(2px 2px at 55% 85%, rgba(125, 195, 255, 0.9), transparent),
        radial-gradient(1px 1px at 75% 35%, rgba(125, 195, 255, 0.8), transparent),
        radial-gradient(2px 2px at 95% 55%, rgba(125, 195, 255, 0.9), transparent);
    background-size: 250% 250%;
    background-repeat: repeat;
    animation: twinkle 12s ease-in-out infinite reverse, drift 150s linear infinite reverse;
    opacity: 0.7;
}

.stars-layer-3 {
    background-image: 
        radial-gradient(3px 3px at 15% 35%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(2px 2px at 45% 75%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 70% 25%, rgba(255, 255, 255, 0.5), transparent),
        radial-gradient(2px 2px at 85% 60%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(3px 3px at 30% 80%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 60% 15%, rgba(255, 255, 255, 0.5), transparent),
        radial-gradient(2px 2px at 95% 90%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 5% 50%, rgba(255, 255, 255, 0.5), transparent),
        radial-gradient(3px 3px at 50% 95%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(2px 2px at 35% 20%, rgba(255, 255, 255, 0.6), transparent);
    background-size: 300% 300%;
    background-repeat: repeat;
    animation: twinkle 15s ease-in-out infinite, drift 180s linear infinite;
    opacity: 0.5;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

@keyframes drift {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(-50px, -50px);
    }
}

/* 流星效果 */
.shooting-stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    overflow: hidden;
}

.shooting-stars::before,
.shooting-stars::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    box-shadow: 
        0 0 6px rgba(255, 255, 255, 0.8),
        0 0 12px rgba(125, 195, 255, 0.6),
        -100px 0 0 rgba(255, 255, 255, 0.6),
        -200px 0 0 rgba(255, 255, 255, 0.4),
        -300px 0 0 rgba(255, 255, 255, 0.2);
}

.shooting-stars::before {
    top: 20%;
    left: 20%;
    animation: shootingStar1 3s linear infinite;
}

.shooting-stars::after {
    top: 50%;
    left: 80%;
    animation: shootingStar2 4s linear infinite;
    animation-delay: 1.5s;
}

@keyframes shootingStar1 {
    0% {
        transform: translate(0, 0) rotate(45deg);
        opacity: 1;
    }
    100% {
        transform: translate(-500px, 500px) rotate(45deg);
        opacity: 0;
    }
}

@keyframes shootingStar2 {
    0% {
        transform: translate(0, 0) rotate(-45deg);
        opacity: 1;
    }
    100% {
        transform: translate(500px, 500px) rotate(-45deg);
        opacity: 0;
    }
}

/* 内容区域 */
.content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    text-align: center;
}

.logo-container {
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
    transform: translateY(-30px);
}

.logo {
    max-width: 400px;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 20px rgba(125, 195, 255, 0.5));
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
    text-shadow: 
        0 0 10px rgba(125, 195, 255, 0.8),
        0 0 20px rgba(125, 195, 255, 0.6),
        0 0 30px rgba(125, 195, 255, 0.4),
        0 0 40px rgba(125, 195, 255, 0.2);
    animation: fadeInUp 1s ease-out 0.2s both;
    letter-spacing: 0.05em;
}

.slogan {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 3rem;
    font-weight: 400;
    text-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.5),
        0 0 20px rgba(125, 195, 255, 0.3);
    animation: fadeInUp 1s ease-out 0.4s both;
    letter-spacing: 0.05em;
    transform: translateY(-30px);
}

.coming-soon {
    animation: fadeInUp 1s ease-out 0.6s both;
    transform: translateY(30px);
}

.coming-soon-text {
    display: inline-block;
    font-size: clamp(0.75rem, 2.5vw, 1.1rem);
    color: #7DC3FF;
    font-weight: 300;
    padding: 1rem 2rem;
    border: 2px solid rgba(125, 195, 255, 0.5);
    border-radius: 50px;
    background: rgba(125, 195, 255, 0.1);
    backdrop-filter: blur(10px);
    text-shadow: 
        0 0 10px rgba(125, 195, 255, 0.8),
        0 0 20px rgba(125, 195, 255, 0.4);
    box-shadow: 
        0 0 20px rgba(125, 195, 255, 0.3),
        inset 0 0 20px rgba(125, 195, 255, 0.1);
    animation: pulse 2s ease-in-out infinite;
    transition: all 0.3s ease;
}

.coming-soon-text:hover {
    transform: scale(1.05);
    border-color: rgba(125, 195, 255, 0.8);
    box-shadow: 
        0 0 30px rgba(125, 195, 255, 0.5),
        inset 0 0 30px rgba(125, 195, 255, 0.2);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 
            0 0 20px rgba(125, 195, 255, 0.3),
            inset 0 0 20px rgba(125, 195, 255, 0.1);
    }
    50% {
        box-shadow: 
            0 0 30px rgba(125, 195, 255, 0.5),
            inset 0 0 30px rgba(125, 195, 255, 0.2);
    }
}

/* 版权信息 */
.copyright {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 1.5rem 2rem;
    z-index: 10;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.copyright p {
    font-size: clamp(0.75rem, 2vw, 0.9rem);
    color: rgba(255, 255, 255, 0.6);
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.02em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .logo {
        max-width: 280px;
    }
    
    .content {
        padding: 1.5rem;
    }
    
    .title {
        margin-bottom: 0.5rem;
    }
    
    .slogan {
        margin-bottom: 2rem;
    }
    
    .stars-layer-1,
    .stars-layer-2,
    .stars-layer-3 {
        background-size: 150% 150%;
    }
}

@media (max-width: 480px) {
    .logo {
        max-width: 200px;
    }
    
    .coming-soon-text {
        padding: 0.8rem 1.5rem;
        font-size: 0.7rem;
    }
    
    .stars-layer-1,
    .stars-layer-2,
    .stars-layer-3 {
        background-size: 120% 120%;
    }
    
    .copyright {
        padding: 1rem 1.5rem;
    }
}

@media (orientation: landscape) and (max-height: 600px) {
    .content {
        padding: 1rem;
    }
    
    .logo {
        max-width: 200px;
        margin-bottom: 1rem;
    }
    
    .title {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }
    
    .slogan {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .coming-soon-text {
        padding: 0.5rem 1.5rem;
        font-size: 0.7rem;
    }
    
    .copyright {
        padding: 0.8rem 1rem;
    }
}