body {
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(160deg, #0d2f36 0%, #19b7b4 100%);
    color: white;
    font-family: "Helvetica Neue", "Yu Gothic", sans-serif;
    overflow: hidden;
}

.logo {
    font-size: 4rem;
    letter-spacing: 0.15em;
    color: #b3f2f7;
    animation: fadeIn 3s ease-in-out;
}

.tagline {
    margin-top: 1rem;
    font-size: 1.4rem;
    color: #ffffffb3;
    text-align: center;
    animation: fadeIn 4s ease-in-out;
}

.scroll-indicator {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: #b3f2f7;
    text-align: center;
    text-decoration: none;
    opacity: 0.8;
    animation: float 2.4s infinite ease-in-out;
    transition: opacity 0.3s ease, transform 0.3 ease;
}
.scroll-indicator span {
    display: block;
    font-size: 0.8rem;
    margin-top: 6px;
    letter-spacing: 0.1em;
    color: #8fd8dd;
}
.scroll-indicator: hover {
    opacity: 1;
    transform: transelate(-50%, 4px);
}

.intro-section {
    min-height: 100vh;
    background: linear-gradient(to bottom, #0d1c1f 0%, #142f35 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #eaf8fa;
    padding: 60px 20px;
}
.intro-section h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #b3f2f7;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}
.intro-section p {
    font-size: 1rem;
    line-height: 1.8;
    color: #d7eaea;
    max-width: 700px;
    margin: 0 auto;
}

footer {
    position: absolute;
    bottom: 10px;
    font-size: 0.8rem;
    opacity: 0.4;
    letter-spacing: 0.1em;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 768px) {
    .scroll-indicator {
        bottom: 100px;
    }
}