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

body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: #fff;
}

.nav {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: #fff;
    border-bottom: 1px solid #eee;
    z-index: 10;
}

.nav__brand {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.nav__menu {
    display: flex;
    gap: 24px;
}

.nav__link {
    text-decoration: none;
    color: #888;
    font-size: 14px;
    transition: color 0.2s;
}

.nav__link:hover { color: #000; }

.nav__link.is-active {
    color: #000;
    font-weight: 600;
}

.page {
    padding: 0;
}

.page__img {
    display: block;
    width: 100%;
    max-width: 1080px;
    height: auto;
    object-fit: contain;
    margin: 0 auto;
}