* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: #0a0a0a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
}
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 30%, #16213e 60%, #0a0a0a 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}
.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(243, 198, 105, 0.3);
    animation: floatUp linear infinite;
}
@keyframes floatUp {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}
.container {
    position: relative;
    z-index: 10;
    text-align: center;
}
.title {
    color: #fff;
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 10px;
    opacity: 0;
    animation: fadeInDown 0.8s ease 0.2s forwards;
}
.subtitle {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    letter-spacing: 2px;
    margin-bottom: 50px;
    opacity: 0;
    animation: fadeInDown 0.8s ease 0.4s forwards;
}
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.btn-wrapper {
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.btn {
    position: relative;
    display: inline-block;
    padding: 16px 60px;
    font-size: 18px;
    font-weight: bold;
    color: #0a0a0a;
    background: linear-gradient(135deg, #f3c669 0%, #e8a840 100%);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    letter-spacing: 3px;
    text-decoration: none;
    transition: all 0.4s ease;
    box-shadow: 0 8px 30px rgba(243, 198, 105, 0.3);
    overflow: hidden;
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(243, 198, 105, 0.5);
    background: linear-gradient(135deg, #f5d080 0%, #f0b850 100%);
}
.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 20px rgba(243, 198, 105, 0.4);
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}
.btn:hover::before {
    left: 100%;
}
.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(0);
    animation: rippleEffect 0.6s linear;
    pointer-events: none;
}
@keyframes rippleEffect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}
.loading-dots {
    display: none;
    margin-top: 20px;
}
.loading-dots.active {
    display: block;
}
.loading-dots span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #f3c669;
    margin: 0 4px;
    animation: dotBounce 1.4s ease-in-out infinite both;
}
.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }
@keyframes dotBounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}
.footer-text {
    position: fixed;
    bottom: 30px;
    left: 0;
    width: 100%;
    text-align: center;
    color: rgba(255, 255, 255, 0.2);
    font-size: 12px;
    letter-spacing: 1px;
    z-index: 10;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}
@media (max-width: 768px) {
    .title {
        font-size: 22px;
        letter-spacing: 2px;
    }
    .subtitle {
        font-size: 12px;
    }
    .btn {
        padding: 14px 45px;
        font-size: 16px;
    }
}