/* Header 移动端汉堡菜单样式 */

.site-shell-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: transparent;
    border: 0;
    padding: 0;
    cursor: pointer;
    margin-left: auto;
    transition: transform 0.3s ease;
}

.site-shell-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--brand-ink-900);
    transition: all 0.3s ease;
}

.site-shell-hamburger.is-active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.site-shell-hamburger.is-active span:nth-child(2) {
    opacity: 0;
}

.site-shell-hamburger.is-active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* 移动端响应式 */
@media (max-width: 800px) {
    .site-shell-hamburger {
        display: flex;
    }

    .site-shell-nav {
        position: fixed;
        top: 82px;
        left: 0;
        right: 0;
        background: var(--brand-surface);
        border-bottom: 1px solid var(--brand-line);
        padding: 24px;
        margin: 0;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s 0.3s;
        z-index: 1000;
        box-shadow: 0 8px 16px rgba(23, 33, 31, 0.08);
    }

    .site-shell-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .site-shell-nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .site-shell-nav__list a {
        display: block;
        font-size: 16px;
        padding: 8px 0;
    }

    .site-shell-cta {
        display: none;
    }
}

@media (max-width: 480px) {
    .site-shell-header__inner {
        min-height: 64px;
        gap: 16px;
    }

    .site-shell-logo {
        font-size: 20px;
    }

    .site-shell-logo span {
        font-size: 10px;
    }

    .site-shell-nav {
        top: 64px;
        padding: 20px;
    }

    .site-shell-hamburger {
        width: 24px;
        height: 18px;
    }
}