/* ===== 响应式 - 平板 ===== */
@media (max-width: 1100px) {
    .site-nav__list { gap: 14px; }
    .site-header__quote { display: none; }

    .hero__grid { gap: 40px; }
    .hero__metrics { gap: 28px; }

    .card-grid--four { grid-template-columns: repeat(2, 1fr); }
    .check-list { grid-template-columns: repeat(2, 1fr); }

    .process-list { grid-template-columns: repeat(3, 1fr); row-gap: 32px; }
    .process-list li::after { display: none; }

    .stats-band__grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }

    .site-footer__grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .site-footer__contact { grid-column: 1 / -1; max-width: 560px; }
}

/* ===== 响应式 - 小平板/大手机 ===== */
@media (max-width: 820px) {
    :root { --header-height: 66px; }

    .container { width: min(calc(100% - 32px), var(--container-width)); }
    .section { padding: 68px 0; }

    /* 导航转移动端 */
    .site-nav { display: none; }
    .site-header__inner { min-height: var(--header-height); justify-content: space-between; }
    .menu-toggle {
        display: grid;
        gap: 4px;
        width: 42px;
        height: 42px;
        place-content: center;
    }
    .menu-toggle span:not(.screen-reader-text) {
        width: 20px;
        height: 2px;
        border-radius: 2px;
        background: var(--color-heading);
    }

    .mobile-navigation[hidden] { display: none; }
    .mobile-navigation {
        position: fixed;
        z-index: 100;
        inset: 0;
        display: block;
        background: rgba(10, 22, 40, .50);
        backdrop-filter: blur(4px);
    }
    .mobile-navigation__panel {
        width: min(88vw, 360px);
        min-height: 100%;
        padding: 22px;
        background: #fff;
        box-shadow: var(--shadow-float);
    }
    .mobile-navigation__top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-bottom: 18px;
        border-bottom: 1px solid var(--color-border);
    }
    .mobile-navigation__top img { width: 130px; }
    .menu-close { display: block; font-size: 30px; line-height: 1; }
    .mobile-navigation__list { padding: 14px 0 24px; }
    .mobile-navigation__list a {
        display: block;
        padding: 13px 0;
        border-bottom: 1px solid var(--color-border-light);
        color: var(--color-heading);
        font-weight: 700;
    }

    /* Hero */
    .hero { padding: 80px 0 64px; }
    .hero__grid { grid-template-columns: 1fr; }
    .hero__visual { max-width: 600px; width: 100%; margin-inline: auto; }
    .hero__metrics { flex-wrap: wrap; }

    /* 网格转2列 */
    .service-grid, .case-grid, .article-grid { grid-template-columns: repeat(2, 1fr); }

    /* 页脚 */
    .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
    .site-footer__brand { grid-column: 1 / -1; }

    /* CTA */
    .consultation__inner { display: block; }
    .consultation__actions { margin-top: 26px; }

    /* 隐藏浮动咨询，显示底部固定栏 */
    .consultation-float { display: none; }
    .mobile-consultation {
        position: fixed;
        z-index: 40;
        right: 0; bottom: 0; left: 0;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        padding-bottom: env(safe-area-inset-bottom);
        background: #fff;
        box-shadow: 0 -6px 20px rgba(15, 23, 42, .10);
    }
    .mobile-consultation a {
        padding: 13px 6px;
        border-right: 1px solid var(--color-border-light);
        color: var(--color-primary);
        text-align: center;
        font-size: 13px;
        font-weight: 700;
    }
    .mobile-consultation a:last-child {
        border-right: 0;
        background: var(--gradient-accent);
        color: #fff;
    }
    .site-footer { padding-bottom: 56px; }
}

/* ===== 响应式 - 手机 ===== */
@media (max-width: 560px) {
    .section-heading { margin-bottom: 34px; }
    .hero h1 { font-size: 36px; }
    .hero__lead { font-size: 17px; }
    .hero__actions .button { width: 100%; }
    .hero__actions .text-link { margin: 4px auto 0; }
    .hero__visual { min-height: auto; padding: 18px; }
    .hero__metrics { gap: 20px; }
    .hero__metric strong { font-size: 26px; }
    .answer-panel { width: 92%; }

    .card-grid--four,
    .service-grid,
    .case-grid,
    .article-grid,
    .check-list,
    .stats-band__grid { grid-template-columns: 1fr; }

    .process-list { grid-template-columns: 1fr; gap: 20px; }
    .process-list li {
        display: grid;
        grid-template-columns: 52px 1fr;
        gap: 16px;
        align-items: start;
        padding: 0;
        text-align: left;
    }
    .process-list span { margin: 0; }
    .process-list li::after { display: none; }

    .site-footer__grid { grid-template-columns: 1fr; gap: 30px; }
    .site-footer__contact { grid-column: auto; }
    .site-footer__bottom .container { display: block; }
    .site-footer__bottom nav { margin-top: 10px; }

    .comparison-table th, .comparison-table td { padding: 14px; }
    .consultation__actions .button { width: 100%; }
}