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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
        "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    background: #ffffff;
    color: #222222;
    line-height: 1.8;
}

header {
    border-bottom: 1px solid #eeeeee;
    background: rgba(255, 255, 255, 0.95);
}

.header-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 25px;
    font-weight: 800;
    color: #ff66c4;
    text-decoration: none;
}

nav a {
    color: #555555;
    text-decoration: none;
    margin-left: 22px;
    font-size: 14px;
}

nav a:hover {
    color: #ff66c4;
}

.hero {
    min-height: 560px;
    padding: 100px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background:
        radial-gradient(circle at 50% 25%, rgba(255, 102, 196, 0.16), transparent 40%),
        #ffffff;
}

.hero h1 {
    font-size: clamp(36px, 7vw, 68px);
    line-height: 1.2;
    margin-bottom: 25px;
}

.hero h1 span {
    color: #ff66c4;
}

.hero p {
    font-size: 18px;
    color: #666666;
    max-width: 650px;
}

.content {
    max-width: 900px;
    margin: 0 auto;
    padding: 80px 24px;
}

.content h1 {
    font-size: 36px;
    margin-bottom: 35px;
}

.content h2 {
    font-size: 23px;
    margin-top: 48px;
    margin-bottom: 14px;
}

.content p {
    margin-bottom: 18px;
    color: #4b4b4b;
}

.features {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 24px 100px;
}

.features-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 45px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 30px 24px;
    border-radius: 22px;
    background: #fafafa;
    border: 1px solid #eeeeee;
}

.feature-card h3 {
    margin-bottom: 10px;
    color: #ff66c4;
}

.feature-card p {
    color: #666666;
    font-size: 14px;
}

.contact-box {
    padding: 28px;
    margin: 30px 0;
    background: #fff4fb;
    border-radius: 18px;
}

.contact-box a {
    color: #e94eae;
}

footer {
    border-top: 1px solid #eeeeee;
    padding: 40px 24px;
    text-align: center;
    color: #888888;
    font-size: 13px;
}

.footer-links {
    margin-bottom: 14px;
}

.footer-links a {
    margin: 0 10px;
    color: #666666;
    text-decoration: none;
}

.footer-links a:hover {
    color: #ff66c4;
}

@media (max-width: 700px) {
    nav {
        display: none;
    }

    .hero {
        min-height: 480px;
        padding: 70px 20px;
    }

    .hero p {
        font-size: 16px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .content {
        padding: 55px 20px;
    }

    .content h1 {
        font-size: 30px;
    }
}