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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #e8f4f8 0%, #f0f9ff 50%, #fff5f5 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #333;
    overflow-x: hidden;
    position: relative;
}

.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.cloud {
    position: absolute;
    font-size: 80px;
    opacity: 0.15;
    animation: cloudFloat 20s ease-in-out infinite;
}

.cloud-1 {
    top: 10%;
    left: -100px;
    animation-delay: 0s;
    animation-duration: 25s;
}

.cloud-2 {
    top: 30%;
    right: -100px;
    animation-delay: 5s;
    animation-duration: 30s;
}

.cloud-3 {
    top: 60%;
    left: -100px;
    animation-delay: 10s;
    animation-duration: 28s;
}

@keyframes cloudFloat {
    0% {
        transform: translateX(0) translateY(0);
    }
    50% {
        transform: translateX(calc(100vw + 200px)) translateY(-20px);
    }
    100% {
        transform: translateX(0) translateY(0);
    }
}

.rain-drop {
    position: absolute;
    width: 3px;
    height: 20px;
    background: linear-gradient(to bottom, rgba(69, 183, 209, 0.3), rgba(69, 183, 209, 0.1));
    border-radius: 2px;
    animation: rainFall linear infinite;
    opacity: 0.4;
}

.rain-drop:nth-child(4) { left: 10%; animation-duration: 1s; animation-delay: 0s; }
.rain-drop:nth-child(5) { left: 20%; animation-duration: 1.2s; animation-delay: 0.2s; }
.rain-drop:nth-child(6) { left: 30%; animation-duration: 0.9s; animation-delay: 0.1s; }
.rain-drop:nth-child(7) { left: 40%; animation-duration: 1.1s; animation-delay: 0.3s; }
.rain-drop:nth-child(8) { left: 50%; animation-duration: 1.3s; animation-delay: 0.15s; }
.rain-drop:nth-child(9) { left: 60%; animation-duration: 0.95s; animation-delay: 0.25s; }
.rain-drop:nth-child(10) { left: 70%; animation-duration: 1.15s; animation-delay: 0.05s; }
.rain-drop:nth-child(11) { left: 80%; animation-duration: 1.05s; animation-delay: 0.35s; }
.rain-drop:nth-child(12) { left: 90%; animation-duration: 1.25s; animation-delay: 0.2s; }

@keyframes rainFall {
    0% {
        top: -20px;
        opacity: 0.4;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        top: 100vh;
        opacity: 0;
    }
}

.container {
    width: 100%;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.content {
    background: #fff;
    backdrop-filter: blur(10px);
    border-radius: 30px;
    padding: 50px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out;
    transition: transform 0.3s ease;
}

.content:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.5);
}

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

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.logo-container {
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
}

.brand-logo {
    max-width: 450px;
    width: 100%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 2;
}

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

.logo-shine {
    position: absolute;
    top: 0;
    left: 50%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: translateX(-50%) skewX(-20deg);
    animation: shine 3s infinite;
    pointer-events: none;
}

@keyframes shine {
    0% {
        left: -100%;
    }
    100% {
        left: 200%;
    }
}

.old-logo {
    font-size: 32px;
    font-weight: 400;
    color: #666;
    margin-top: 15px;
    letter-spacing: 1px;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 15px;
}

.old-logo-text {
    position: relative;
    transition: all 0.3s ease;
}

.old-logo-text::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
    border-radius: 2px;
    animation: lineGrow 1s ease-out;
}

@keyframes lineGrow {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.arrow-transition {
    font-size: 28px;
    color: #4ecdc4;
    animation: arrowPulse 2s ease-in-out infinite;
}

@keyframes arrowPulse {
    0%, 100% {
        transform: translateX(0);
        opacity: 0.7;
    }
    50% {
        transform: translateX(5px);
        opacity: 1;
    }
}

.new-logo-hint {
    color: #45b7d1;
    font-weight: 600;
    opacity: 0.8;
}

.message-box {
    text-align: center;
    position: relative;
    z-index: 2;
}

.greeting {
    font-size: 42px;
    color: #333;
    margin-bottom: 40px;
    font-weight: 600;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4, #45b7d1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.transition-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
    position: relative;
}

.transition-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #4ecdc4, transparent);
    z-index: 0;
    opacity: 0.3;
}

.transition-section > * {
    position: relative;
    z-index: 1;
}

.site-link {
    font-size: 24px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 12px;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
}

.old-site {
    color: #666;
    background: #f5f5f5;
    border: 2px solid #ddd;
}

.old-site:hover {
    background: #eee;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.new-site {
    color: white;
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
    background-size: 200% 200%;
    animation: gradientMove 3s ease infinite;
    border: 2px solid transparent;
}

.video-container {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 16/12;
}

.video-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 16px;
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-container:hover::before {
    opacity: 1;
}

.transition-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    z-index: 0;
}

.transition-video.active {
    opacity: 1;
    z-index: 1;
}

.description {
    font-size: 18px;
    line-height: 1.8;
    color: #555;
    margin: 35px 0;
}

.appreciation-text {
    font-size: 18px;
    line-height: 1.8;
    color: #666;
    margin: 30px 0;
    font-style: italic;
    padding: 20px;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.05) 0%, rgba(78, 205, 196, 0.05) 50%, rgba(69, 183, 209, 0.05) 100%);
    border-radius: 12px;
    border-left: 4px solid #4ecdc4;
}

.announcement {
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
    color: white;
    padding: 35px;
    border-radius: 20px;
    margin: 35px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.announcement::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    animation: rotate 15s linear infinite;
}

.announcement::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.announcement-icon {
    font-size: 56px;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-10px) scale(1.1);
    }
}

.announcement-title {
    font-size: 32px;
    font-weight: 700;
    margin: 0;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.sparkles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.sparkle {
    position: absolute;
    font-size: 20px;
    animation: sparkleFloat 3s ease-in-out infinite;
}

.sparkle:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.sparkle:nth-child(2) {
    top: 30%;
    right: 25%;
    animation-delay: 1s;
}

.sparkle:nth-child(3) {
    bottom: 25%;
    left: 30%;
    animation-delay: 2s;
}

@keyframes sparkleFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translate(10px, -10px) scale(1.2);
        opacity: 1;
    }
}

.description {
    font-size: 17px;
    line-height: 1.8;
    color: #555;
    margin: 30px 0;
}

.highlight-box {
    background: linear-gradient(135deg, #fff9e6 0%, #fff5e6 100%);
    padding: 30px;
    border-radius: 20px;
    margin: 35px 0;
    border-left: 5px solid #ffd93d;
    box-shadow: 0 4px 15px rgba(255, 217, 61, 0.25);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-box:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(255, 217, 61, 0.35);
}

.highlight-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    transition: left 0.5s;
}

.highlight-box:hover::before {
    left: 100%;
}

.highlight-text {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
    margin: 0;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
    color: white;
    padding: 20px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 600;
    margin: 40px 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
    background-size: 200% 200%;
    animation: gradientMove 3s ease infinite;
}

@keyframes gradientMove {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.button-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cta-button:hover .button-bg {
    opacity: 1;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
}

.button-text {
    position: relative;
    z-index: 2;
}

.button-arrow {
    font-size: 24px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    z-index: 2;
}

.cta-button:hover .button-arrow {
    transform: translateX(8px) scale(1.2);
}

.button-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cta-button:hover .particle {
    opacity: 1;
    animation: particleFloat 1s ease-out forwards;
}

.particle:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    top: 30%;
    right: 20%;
    animation-delay: 0.1s;
}

.particle:nth-child(3) {
    bottom: 20%;
    left: 30%;
    animation-delay: 0.2s;
}

.particle:nth-child(4) {
    bottom: 30%;
    right: 30%;
    animation-delay: 0.3s;
}

@keyframes particleFloat {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx, 20px), var(--ty, -30px)) scale(0);
        opacity: 0;
    }
}

.footer-text {
    font-size: 18px;
    color: #666;
    margin-top: 30px;
    line-height: 1.6;
}

.footer-text strong {
    color: #333;
    font-weight: 600;
    transition: color 0.3s ease;
}

.footer-text strong:hover {
    color: #45b7d1;
}

.tagline {
    display: block;
    font-size: 16px;
    color: #999;
    font-style: italic;
    margin-top: 8px;
    font-weight: normal;
    transition: color 0.3s ease;
}

.tagline:hover {
    color: #4ecdc4;
}

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

.dot {
    position: absolute;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    filter: blur(1px);
}

.dot-1 {
    width: 15px;
    height: 15px;
    background: #ff6b6b;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
    opacity: 0.3;
}

.dot-2 {
    width: 12px;
    height: 12px;
    background: #4ecdc4;
    top: 20%;
    right: 15%;
    animation-delay: 1.5s;
    opacity: 0.3;
}

.dot-3 {
    width: 18px;
    height: 18px;
    background: #45b7d1;
    bottom: 15%;
    left: 20%;
    animation-delay: 3s;
    opacity: 0.3;
}

.dot-4 {
    width: 10px;
    height: 10px;
    background: #ffd93d;
    bottom: 25%;
    right: 10%;
    animation-delay: 4.5s;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1) rotate(0deg);
        opacity: 0.3;
    }
    25% {
        transform: translateY(-15px) scale(1.1) rotate(90deg);
        opacity: 0.5;
    }
    50% {
        transform: translateY(-25px) scale(1.2) rotate(180deg);
        opacity: 0.6;
    }
    75% {
        transform: translateY(-15px) scale(1.1) rotate(270deg);
        opacity: 0.5;
    }
}

@media (max-width: 768px) {
    .content {
        padding: 35px 25px;
    }
    
    .brand-logo {
        max-width: 320px;
    }
    
    .greeting {
        font-size: 32px;
        margin-bottom: 30px;
    }
    
    .transition-section {
        flex-direction: column;
        gap: 15px;
        margin: 30px 0;
    }
    
    .site-link {
        font-size: 18px;
        padding: 10px 20px;
    }
    
    .video-container {
        min-width: 100%;
        max-width: 100%;
    }
    
    .description,
    .appreciation-text {
        font-size: 16px;
        margin: 25px 0;
    }
    
    .appreciation-text {
        padding: 15px;
    }
    
    .highlight-box {
        padding: 20px;
    }
    
    .highlight-text {
        font-size: 15px;
    }
    
    .cta-button {
        padding: 16px 30px;
        font-size: 18px;
    }
    
    .cloud {
        font-size: 60px;
    }
}