*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    background: #FFFFFF;
    color: #1D1D1F;
    line-height: 1.5;
}
a {
    color: #007AFF;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 32px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 100;
}
.site-header__wordmark {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.3px;
}
.site-header__cta {
    background: #007AFF;
    color: #FFFFFF;
    font-size: 14px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 8px;
    transition: background 0.15s ease;
}
.site-header__cta:hover {
    background: #0062CC;
    text-decoration: none;
}
.hero {
    max-width: 640px;
    margin: 0 auto;
    padding: 80px 24px 64px;
    text-align: center;
}
.hero__title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: 14px;
}
.hero__subtitle {
    font-size: 19px;
    color: #6E6E73;
    line-height: 1.5;
    margin-bottom: 24px;
}
.hero__cta {
    display: inline-block;
    background: #007AFF;
    color: #FFFFFF;
    font-size: 17px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: 12px;
    transition: background 0.15s ease, transform 0.15s ease;
}
.hero__cta:hover {
    background: #0062CC;
    text-decoration: none;
    transform: translateY(-1px);
}
.hero__note {
    font-size: 13px;
    color: #8E8E93;
    margin-top: 12px;
}
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 24px 72px;
}
.feature__title {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.2px;
}
.feature__text {
    font-size: 15px;
    color: #6E6E73;
    line-height: 1.6;
}
.proof {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 24px 72px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.proof__figure {
    text-align: center;
}
.proof__image {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    background: #F5F5F7;
}
.proof__image--trend {
    aspect-ratio: 1.941 / 1;
    object-fit: cover;
    width: 100%;
}
.proof__image--alert {
    aspect-ratio: 1.864 / 1;
    object-fit: cover;
    width: 100%;
    max-width: 620px;
}
.proof__caption {
    font-size: 14px;
    color: #8E8E93;
    margin-top: 12px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}
.privacy {
    background: #F5F5F7;
    padding: 56px 24px;
    text-align: center;
}
.privacy__statement {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    max-width: 640px;
    margin: 0 auto 12px;
}
.privacy__text {
    font-size: 16px;
    color: #6E6E73;
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}
.faq {
    max-width: 680px;
    margin: 0 auto;
    padding: 64px 24px 80px;
}
.faq__heading {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 20px;
}
.faq__item {
    border-bottom: 1px solid #E5E5EA;
    padding: 14px 0;
}
.faq__question {
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    list-style: none;
    position: relative;
    padding-right: 28px;
}
.faq__question::-webkit-details-marker {
    display: none;
}
.faq__question::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 0;
    font-size: 20px;
    font-weight: 400;
    color: #8E8E93;
    transition: transform 0.15s ease;
}
.faq__item[open] .faq__question::after {
    transform: rotate(45deg);
}
.faq__answer {
    font-size: 15px;
    color: #6E6E73;
    line-height: 1.6;
    margin-top: 8px;
}
.site-footer {
    text-align: center;
    padding: 40px 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}
.site-footer__wordmark {
    font-size: 13px;
    font-weight: 600;
    color: #8E8E93;
    margin-bottom: 8px;
}
.site-footer__links a {
    color: #8E8E93;
    font-size: 12px;
    margin: 0 8px;
}
.site-footer__links a:hover {
    color: #007AFF;
    text-decoration: none;
}
@media (max-width: 768px) {
    .hero {
        padding: 56px 20px 48px;
    }
    .hero__title {
        font-size: 34px;
    }
    .hero__subtitle {
        font-size: 17px;
    }
    .features {
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 0 20px 56px;
    }
    .proof {
        padding: 0 20px 56px;
        gap: 32px;
    }
    .privacy {
        padding: 44px 20px;
    }
    .privacy__statement {
        font-size: 22px;
    }
    .faq {
        padding: 48px 20px 56px;
    }
}