* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #fff;
    position: relative;
    overflow-x: hidden;
    background: url('https://i.ibb.co/5XMtX2TV/image.jpg') no-repeat center center fixed;
    background-size: cover;
}

/* 星空背景效果 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    animation: twinkle var(--duration) infinite ease-in-out;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}

.content {
    max-width: 700px;
    width: 100%;
    padding: 40px 30px;
    text-align: center;
    position: relative;
    z-index: 100;
    background: transparent;
    border: none;
    box-shadow: none;
    margin-top: 30px;
}

.logo {
    width: 140px;
    height: 140px;
    margin: 0 auto 25px;
    background: black;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 60px rgba(122, 63, 255, 0.6);
    animation: pulse 4s infinite;
    position: relative;
    z-index: 10;
    border: 2px solid rgba(180, 140, 255, 0.4);
    transition: all 0.5s ease;
    overflow: hidden;
}

.logo:hover {
    transform: scale(1.05);
    box-shadow: 0 0 80px rgba(122, 63, 255, 0.8);
}

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

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(122, 63, 255, 0.5); }
    70% { transform: scale(1); box-shadow: 0 0 0 30px rgba(122, 63, 255, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(122, 63, 255, 0); }
}

.header h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 15px;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(122, 63, 255, 0.8);
    color: #ffffff;
    transition: all 0.4s ease;
}

.header:hover h1 {
    text-shadow: 0 0 30px rgba(122, 63, 255, 0.9);
}

.header p {
    font-size: 35px;
    opacity: 0.9;
    max-width: 80%;
    margin: 0 auto 35px;
    line-height: 1.6;
    color: #ffffff;
    font-weight: 300;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.buttons {
    padding: 15px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 25px;
    margin: 20px 0;
    max-width: 350px;
    margin: 0 auto;
}

.btn {
    display: block;
    padding: 0;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 10;
    width: 100%;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
    border: none;
}

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

.btn:active {
    transform: translateY(2px);
}

.btn-img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 0;
}

.motto-container {
    padding: 30px 0;
    text-align: center;
    margin-top: 20px;
}

.motto-img {
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    display: block;
    filter: drop-shadow(0 0 20px rgba(79, 172, 254, 0.8));
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        filter: drop-shadow(0 0 10px rgba(79, 172, 254, 0.5));
    }
    to {
        filter: drop-shadow(0 0 30px rgba(79, 172, 254, 0.8))
        drop-shadow(0 0 40px rgba(79, 172, 254, 0.6));
    }
}

.footer {
    padding: 30px 20px;
    font-size: 16px;
    line-height: 1.7;
    text-align: center;
    position: relative;
    z-index: 10;
    margin-top: 40px;
    border-top: 1px solid rgba(120, 80, 200, 0.2);
    width: 100%;
    max-width: 800px;
    background: rgba(10, 5, 30, 0.25);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
}

.footer:hover {
    background: rgba(15, 8, 40, 0.35);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.footer p {
    margin: 12px 0;
    color: #c0d0f0;
    font-weight: 300;
}

.icp {
    margin-top: 15px;
    font-weight: 500;
    font-size: 14px;
    opacity: 0.9;
    color: #a78bfa;
}

/* 流星效果 */
.shooting-star {
    position: fixed;
    height: 3px;
    background: linear-gradient(to right,
    rgba(255,255,255,0) 0%,
    rgba(180,140,255,1) 30%,
    rgba(255,255,255,0.8) 50%,
    rgba(255,255,255,0) 100%);
    z-index: 1;
    opacity: 0;
    filter: blur(1.5px);
}

/* 功能卡片 */
.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 25px;
    margin: 30px 0;
    max-width: 800px;
}

.feature-card {
    width: 180px;
    padding: 25px 15px;
    background: rgba(20, 10, 50, 0.1);
    border-radius: 20px;
    border: 1px solid rgba(120, 80, 200, 0.3);
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 30px rgba(122, 63, 255, 0.3);
    background: rgba(25, 15, 60, 0.5);
}

.feature-card i {
    font-size: 42px;
    margin-bottom: 15px;
    color: #a78bfa;
    text-shadow: 0 0 15px rgba(167, 139, 250, 0.6);
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #d6c8ff;
}

.feature-card p {
    font-size: 14px;
    color: #b0c4de;
}

/* 行星样式 */
.planet {
    position: fixed;
    border-radius: 50%;
    z-index: 0;
    box-shadow:
            inset -10px -15px 30px rgba(0, 0, 0, 0.7),
            inset 10px 15px 30px rgba(255, 255, 255, 0.2),
            0 0 30px rgba(255, 255, 255, 0.4);
    transform-style: preserve-3d;
    filter: drop-shadow(0 0 15px rgba(180, 140, 255, 0.3));
    transition: all 0.5s ease;
    animation: planetFloat 15s infinite ease-in-out;
}

@keyframes planetFloat {
    0%, 100% { transform: translateY(0) rotate(0deg) scale(1); }
    50% { transform: translateY(-20px) rotate(5deg) scale(1.05); }
}

/* 行星纹理 */
.moon {
    background: radial-gradient(circle at 30% 30%, #d3d3d3, #a9a9a9);
    box-shadow:
            inset -10px -15px 30px rgba(0, 0, 0, 0.7),
            inset 10px 15px 30px rgba(255, 255, 255, 0.3),
            0 0 40px rgba(255, 255, 255, 0.5);
}
.venus {
    background: radial-gradient(circle at 30% 30%, #e39e54, #b36a2e);
    box-shadow:
            inset -10px -15px 30px rgba(0, 0, 0, 0.7),
            inset 10px 15px 30px rgba(255, 200, 150, 0.3),
            0 0 40px rgba(255, 180, 100, 0.5);
}
.jupiter {
    background: radial-gradient(circle at 30% 30%, #d8ca9d, #b89e65);
    box-shadow:
            inset -15px -20px 40px rgba(0, 0, 0, 0.8),
            inset 15px 20px 40px rgba(255, 230, 180, 0.3),
            0 0 50px rgba(255, 200, 120, 0.6);
}
.mercury {
    background: radial-gradient(circle at 30% 30%, #a9a9a9, #5a5a5a);
    box-shadow:
            inset -8px -12px 25px rgba(0, 0, 0, 0.7),
            inset 8px 12px 25px rgba(255, 255, 255, 0.3),
            0 0 35px rgba(200, 200, 200, 0.5);
}
.mars {
    background: radial-gradient(circle at 30% 30%, #e27b58, #8c3e2e);
    box-shadow:
            inset -10px -15px 30px rgba(0, 0, 0, 0.7),
            inset 10px 15px 30px rgba(255, 180, 150, 0.3),
            0 0 40px rgba(255, 120, 80, 0.5);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .content {
        padding: 30px 20px;
        margin-top: 20px;
    }

    .logo {
        width: 110px;
        height: 110px;
    }

    .header h1 {
        font-size: 36px;
    }

    .header p {
        font-size: 28px;
        max-width: 90%;
    }

    .btn {
        padding: 0;
    }

    .motto-img {
        max-width: 90%;
    }

    .planet {
        transform: scale(0.7);
    }
}

@media (max-width: 600px) {
    .buttons {
        gap: 20px;
    }

    .header h1 {
        font-size: 32px;
    }

    .header p {
        max-width: 95%;
        margin-bottom: 25px;
    }

    .motto-img {
        max-width: 85%;
    }

    .planet {
        transform: scale(0.6);
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 28px;
    }

    .header p {
        font-size: 24px;
    }

    .motto-img {
        max-width: 80%;
    }

    .footer {
        padding: 25px 15px;
        font-size: 14px;
    }

    .planet {
        transform: scale(0.5);
    }
}