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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: #000;
}

.landing-page {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(255, 107, 107, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(78, 205, 196, 0.3) 0%, transparent 50%);
    animation: backgroundPulse 8s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

.content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 1200px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeIn 1s ease-out;
    min-height: 100vh;
}

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

.logo {
    position: absolute;
    top: 30px;
    left: 30px;
    animation: slideInLeft 1s ease-out 0.3s both;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.logo-img {
    width: 150px;
    height: auto;
    object-fit: contain;
}

.character {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    margin: 0;
    animation: characterFloat 3s ease-in-out infinite;
    z-index: 1;
}

@keyframes characterFloat {
    0%, 100% {
        transform: translate(-50%, -50%);
    }
    50% {
        transform: translate(-50%, calc(-50% - 20px));
    }
}

.character-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 30px rgba(255, 107, 107, 0.5));
}

.text-content {
    position: absolute;
    z-index: 20;
    text-align: center;
    bottom: 250px;
    padding: 20px;
    animation: slideInUp 1s ease-out 0.5s both;
    max-width: 700px;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-title {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 107, 107, 0.8),
                 0 0 40px rgba(255, 107, 107, 0.6),
                 0 0 60px rgba(255, 107, 107, 0.4);
    margin-bottom: 15px;
    letter-spacing: 2px;
    animation: titleGlow 2s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% {
        text-shadow: 0 0 20px rgba(255, 107, 107, 0.8),
                     0 0 40px rgba(255, 107, 107, 0.6),
                     0 0 60px rgba(255, 107, 107, 0.4);
    }
    50% {
        text-shadow: 0 0 30px rgba(255, 107, 107, 1),
                     0 0 60px rgba(255, 107, 107, 0.8),
                     0 0 90px rgba(255, 107, 107, 0.6);
    }
}

.sub-title {
    font-size: 1.5rem;
    color: #ffd700;
    margin-bottom: 10px;
    font-weight: 600;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.description {
    font-size: 1.1rem;
    color: #e0e0e0;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.download-section {
    position: absolute;
    z-index: 20;
    bottom: 100px;
    animation: slideInUp 1s ease-out 0.7s both;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 60px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4),
                0 0 0 0 rgba(255, 107, 107, 0.7);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-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;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.6),
                0 0 0 10px rgba(255, 107, 107, 0.3);
}

.download-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.btn-icon {
    font-size: 1.5rem;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(5px);
    }
}

.download-info {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #a0a0a0;
}

.features {
    position: relative;
    z-index: 20;
    display: flex;
    gap: 30px;
    margin-top: 30px;
    animation: slideInUp 1s ease-out 0.9s both;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2rem;
}

.feature-text {
    font-size: 0.9rem;
    color: #fff;
    font-weight: 500;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.particle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: particleFloat 15s linear infinite;
}

.particle-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.particle-2 {
    top: 20%;
    right: 15%;
    animation-delay: 3s;
}

.particle-3 {
    bottom: 30%;
    left: 20%;
    animation-delay: 6s;
}

.particle-4 {
    bottom: 20%;
    right: 10%;
    animation-delay: 9s;
}

.particle-5 {
    top: 50%;
    left: 50%;
    animation-delay: 12s;
}

.particle-6 {
    top: 15%;
    right: 30%;
    animation-delay: 2s;
}

.particle-7 {
    bottom: 40%;
    right: 25%;
    animation-delay: 5s;
}

.particle-8 {
    top: 35%;
    left: 15%;
    animation-delay: 8s;
}

.particle-9 {
    bottom: 15%;
    left: 40%;
    animation-delay: 11s;
}

.particle-10 {
    top: 60%;
    right: 20%;
    animation-delay: 14s;
}

@keyframes particleFloat {
    0% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(100px) scale(0);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .logo {
        top: 15px;
        left: 15px;
    }

    .logo-img {
        width: 150px;
    }

    .character {
        max-width: 800px;
    }

    .main-title {
        font-size: 2rem;
        letter-spacing: 1px;
    }

    .sub-title {
        font-size: 1.2rem;
    }

    .description {
        font-size: 1rem;
    }

    .download-btn {
        padding: 15px 40px;
        font-size: 1.1rem;
    }

    .features {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .feature-item {
        padding: 12px 20px;
    }

    .feature-icon {
        font-size: 1.5rem;
    }

    .feature-text {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .content {
        padding: 15px;
    }

    .logo {
        top: 10px;
        left: 10px;
    }

    .logo-img {
        width: 150px;
    }

    .character {
        max-width: 400px;
    }

    .main-title {
        font-size: 1.6rem;
    }

    .sub-title {
        font-size: 1rem;
    }

    .description {
        font-size: 0.9rem;
    }

    .download-btn {
        padding: 12px 35px;
        font-size: 1rem;
    }

    .btn-icon {
        font-size: 1.2rem;
    }

    .download-info {
        font-size: 0.8rem;
    }

    .features {
        gap: 10px;
    }

    .feature-item {
        padding: 10px 15px;
    }

    .feature-icon {
        font-size: 1.3rem;
    }

    .feature-text {
        font-size: 0.75rem;
    }
}

@media (min-width: 1200px) {
    .main-title {
        font-size: 3.5rem;
    }

    .sub-title {
        font-size: 1.8rem;
    }

    .description {
        font-size: 1.2rem;
    }

    .character {
        max-width: 900px;
    }
}