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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(180deg, #FFD93D 0%, #FFC700 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* Logo Section */
.logo-section {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInDown 0.8s ease-out;
}

.logo-text {
    font-size: 72px;
    font-weight: 900;
    color: #2C2C2C;
    letter-spacing: 8px;
    margin-bottom: 16px;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.1);
    font-family: 'Noto Sans SC', sans-serif;
}

.tagline {
    font-size: 18px;
    font-weight: 500;
    color: #2C2C2C;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.copyright {
    font-size: 13px;
    color: #666;
    font-weight: 400;
}

/* Mascot Section */
.mascot-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
    animation: fadeIn 1s ease-out 0.3s both;
}

.mascot {
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.mascot-image {
    width: 280px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.15));
    transition: transform 0.3s ease;
}

.mascot:hover .mascot-image {
    transform: scale(1.05) rotate(2deg);
}

/* Download Section */
.download-section {
    text-align: center;
    margin-top: auto;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.download-btn {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF5252 100%);
    color: white;
    border: none;
    border-radius: 50px;
    padding: 18px 50px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(255, 82, 82, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.download-btn:hover::before {
    width: 300px;
    height: 300px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 82, 82, 0.5);
}

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

.download-text {
    position: relative;
    z-index: 1;
}

.download-hint {
    margin-top: 16px;
    font-size: 14px;
    color: #666;
    font-weight: 400;
}

/* Features Section */
.features {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.7s both;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 36px;
    background: white;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-item:hover .feature-icon {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    transform: scale(1.1);
}

.feature-text {
    font-size: 14px;
    font-weight: 500;
    color: #2C2C2C;
}

/* Floating Bubbles */
.bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    animation: rise 8s infinite ease-in-out;
    z-index: 0;
}

.bubble-1 {
    width: 80px;
    height: 80px;
    left: 10%;
    bottom: -100px;
    animation-delay: 0s;
}

.bubble-2 {
    width: 120px;
    height: 120px;
    right: 15%;
    bottom: -150px;
    animation-delay: 2s;
}

.bubble-3 {
    width: 60px;
    height: 60px;
    left: 70%;
    bottom: -80px;
    animation-delay: 4s;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes rise {
    0% {
        bottom: -150px;
        opacity: 0;
    }

    50% {
        opacity: 0.3;
    }

    100% {
        bottom: 100vh;
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    .logo-text {
        font-size: 56px;
        letter-spacing: 6px;
    }

    .tagline {
        font-size: 16px;
    }

    .mascot-image {
        width: 220px;
    }

    .download-btn {
        padding: 16px 40px;
        font-size: 18px;
    }

    .features {
        gap: 20px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 30px;
    }

    .feature-text {
        font-size: 13px;
    }
}

@media (max-width: 360px) {
    .logo-text {
        font-size: 48px;
    }

    .mascot-image {
        width: 180px;
    }

    .download-btn {
        padding: 14px 35px;
        font-size: 16px;
    }
}