/* ==========================================================================
   智速力官网 · 响应式
   桌面优先：1440 完整还原，向下按档收缩。手机端保留全部内容与层级，
   不做逐屏精调（两栏表格类模块改单列）。
   ========================================================================== */

/* ---------- ≤1280：收窄页边距 ---------- */
@media (max-width: 1280px) {
  :root {
    --pad-x: 72px;
  }

  .hero h1 { font-size: 46px; }
  .foot__top { gap: 48px; }
  .foot__cols { gap: 40px; }
  .hero__desc { width: 460px; }
  .torque { flex-basis: 400px; width: 400px; }

  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .scenes { grid-template-columns: repeat(2, 1fr); }
  .case__left { flex-basis: 420px; width: 420px; }
  .case { gap: 40px; }

  .ct-form { flex-basis: 620px; width: 620px; }
  .ab-intro { gap: 44px; }
  .ab-intro__img { flex-basis: 460px; width: 460px; height: 360px; }
}

/* ---------- ≤1100：三列/两列收缩 ---------- */
@media (max-width: 1100px) {
  :root {
    --pad-x: 48px;
  }

  .hero { padding: 64px var(--pad-x) 72px; }
  .hero__inner { flex-direction: column; gap: 40px; }
  .hero__desc { width: 100%; max-width: 620px; }
  .torque { flex: 0 0 auto; width: 100%; max-width: 520px; }
  .section { padding: 72px var(--pad-x); }
  .cta-bar { padding: 72px var(--pad-x); }

  .nav__menu { gap: 20px; }
  .nav__right { gap: 16px; }
  .nav__tel { font-size: 14px; }

  /* 首页矩阵：去掉末列，保留四列 */
  .matrix__head,
  .matrix__row {
    grid-template-columns: 40px 96px 1fr 150px;
  }
  .matrix__io { display: none; }

  .inds { grid-template-columns: 1fr 1fr; gap: 28px 0; }
  .inds__item { padding: 0 24px; }
  .inds__item:nth-child(odd) { border-left: 0; padding-left: 0; }
  .inds__item:nth-child(even) { padding-right: 0; }
  .inds__item:nth-child(n+3) { border-top: 1px solid var(--c-line); padding-top: 24px; }

  .svcs { grid-template-columns: 1fr 1fr; gap: 28px; }
  .cred { overflow-x: auto; justify-content: flex-start; gap: 20px; padding-bottom: 10px; }

  .inq { flex-direction: column; gap: 40px; }
  .inq__form { flex: 0 0 auto; width: 100%; max-width: 560px; }

  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-card { height: auto; min-height: 340px; }
  .prod-card__img { flex-basis: 180px; height: 180px; }
  .parts__card { grid-template-columns: repeat(3, 1fr); gap: 24px; }

  .pd__top { flex-direction: column; gap: 32px; align-items: stretch; }
  .pd__gallery { flex: 0 0 auto; width: 100%; }
  .pd__main { width: 100%; height: auto; aspect-ratio: 1 / 1; max-width: 500px; }
  .pd__model { font-size: 38px; }
  .feats { grid-template-columns: 1fr; gap: 16px; }
  .pd-parts__grid { grid-template-columns: 1fr 1fr; }

  .case { flex-direction: column; align-items: stretch; }
  .case__left { flex: 0 0 auto; width: 100%; }

  .entries { grid-template-columns: repeat(3, 1fr); }
  .cal { grid-template-columns: 1fr; gap: 16px; }
  .cal__card { height: auto; }
  .steps { grid-template-columns: 1fr 1fr; }
  .faq { grid-template-columns: 1fr; gap: 0; }
  .faq__col:first-child .faq__item:last-child { border-bottom: 1px solid var(--c-line); }

  .ab-intro { flex-direction: column; align-items: stretch; gap: 28px; }
  .ab-intro__img { flex: 0 0 auto; width: 100%; height: 300px; }
  .fac { grid-template-columns: 1fr 1fr; }
  .caps { grid-template-columns: 1fr 1fr; gap: 28px; }
  .flow { grid-template-columns: 1fr 1fr; }
  .ab-inds { grid-template-columns: repeat(3, 1fr); }
  .ab-creds { grid-template-columns: 1fr; }

  .ct-main { flex-direction: column; gap: 32px; }
  .ct-form { flex: 0 0 auto; width: 100%; }
  .ct-map { width: 100%; }
  .ct-cards { grid-template-columns: 1fr; gap: 16px; }

  .dl-bar { gap: 16px; }
  .dl-search { width: 100%; }
  .dl-ask { flex-direction: column; align-items: flex-start; gap: 20px; }

  .cta-bar__inner { flex-direction: column; align-items: flex-start; gap: 28px; }

  .foot__top { flex-direction: column; gap: 36px; }
  .foot__brand { width: 100%; flex: 0 0 auto; }
  .foot__cols { gap: 40px; flex-wrap: wrap; }
}

/* ---------- ≤900：切移动端导航 ---------- */
@media (max-width: 900px) {
  :root {
    --pad-x: 24px;
  }

  .nav__inner { height: 64px; padding: 0 var(--pad-x); }
  .nav__menu,
  .nav__right { display: none; }
  .nav__toggle { display: flex; margin-left: auto; }
  .nav__logo img { width: 112px; height: auto; }

  .hero { padding: 48px var(--pad-x) 56px; }
  .hero h1 { font-size: 34px; line-height: 1.28; }
  .hero__btns .btn { flex: 1; min-width: 140px; }
  .hero__metrics { gap: 32px; }
  .metric b { font-size: 20px; }

  /* 通栏收尾卡：窄屏改回竖排，否则 40px 的 110+ 会把右侧描述挤成一列字 */
  .prod-card--more {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
  }

  .more-r {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .more-d { max-width: none; }

  .section,
  .cta-bar,
  .page-head,
  .pl-head,
  .pl-body,
  .pl-filters,
  .pd,
  .spec-block,
  .compare,
  .pd-parts,
  .foot { padding-left: var(--pad-x); padding-right: var(--pad-x); }

  .section { padding-top: 56px; padding-bottom: 56px; }
  .page-head { padding-top: 36px; padding-bottom: 36px; }
  .page-head h1 { font-size: 28px; }
  .page-head p { font-size: 14px; }
  .h2 { font-size: 22px; }
  .h3 { font-size: 24px; }
  .cta-bar__text h2 { font-size: 22px; }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .sec-head__note { padding-bottom: 0; }

  /* 首页矩阵：改卡片式 */
  .matrix__head { display: none; }
  .matrix__row {
    grid-template-columns: 40px 1fr;
    gap: 6px 12px;
    padding: 18px 0;
  }
  .matrix__no { grid-row: 1 / 2; font-size: 15px; }
  .matrix__name { grid-column: 2; grid-row: 1 / 2; font-size: 14px; }
  .matrix__desc,
  .matrix__torque,
  .matrix__io { grid-column: 2; }
  .matrix__io { display: block; font-size: 11px; }

  .inds { grid-template-columns: 1fr; gap: 0; }
  .inds__item {
    padding: 20px 0;
    border-left: 0;
    border-top: 1px solid var(--c-line);
  }
  .inds__item:first-child { border-top: 0; padding-top: 0; }
  .inds__item:nth-child(n+3) { padding-top: 20px; }

  .svcs { grid-template-columns: 1fr; gap: 20px; }

  .inq__form { padding: 24px; }
  .inq__row { gap: 12px; }

  .pl-cats { padding: 0 var(--pad-x); }
  .pl-cats__inner { flex-direction: column; align-items: stretch; gap: 12px; border-bottom: 0; }
  /* 手机上改成换行而不是横滑：横滑看不出还能滑，末项容易被裁 */
  .pl-tabs { flex-wrap: wrap; gap: 14px 22px; overflow: visible; }
  .pl-cats__count { padding-bottom: 0; justify-content: space-between; }
  .pl-filters__inner { gap: 16px; }
  .pl-divider { display: none; }

  /* 卡片改横向：手机屏点开列表，一列宽 460 的卡片配 160 高的图片区，
     竖长的电批图 contain 进去只剩 124px 宽，两边全是白。改成左图右字后
     图片区接近方形，卡片也矮了一半，一屏能看三张。 */
  .prod-grid { grid-template-columns: 1fr; gap: 14px; }
  .prod-card {
    height: auto;
    min-height: 0;
    flex-direction: row;
    align-items: stretch;
  }
  /* 通栏收尾卡不跟着变横向 —— 它的 1/-1 让它独占一行，
     横向排会把 40px 的 110+ 和 10px 的 MORE MODELS 挤在同一基线，比例失衡。 */
  .prod-card--more {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 22px 20px;
  }
  .more-l { gap: 10px; }
  .more-n { font-size: 32px; }
  .prod-card__img {
    flex: 0 0 42%;
    height: auto;
    align-self: stretch;
    padding: 12px;
  }
  .prod-card__body {
    flex: 1 1 auto;
    justify-content: center;
    gap: 7px;
    padding: 16px 16px 16px 4px;
  }
  .parts__card { grid-template-columns: 1fr 1fr; }
  .parts__head { padding: 0; flex-direction: column; align-items: flex-start; gap: 12px; }

  .pd__metrics { grid-template-columns: 1fr 1fr !important; gap: 16px; }
  .pd-parts__grid { grid-template-columns: 1fr; }
  .spec-table__row { grid-template-columns: 130px 1fr; gap: 16px; padding: 12px 18px; }
  .compare table { font-size: 12px; }
  .compare th,
  .compare td { padding: 10px 12px; }

  .scenes { grid-template-columns: 1fr; }
  .scene { height: auto; min-height: 176px; }

  .entries { grid-template-columns: 1fr 1fr; }
  .entry { height: auto; min-height: 168px; }
  .steps { grid-template-columns: 1fr; gap: 20px; }

  .fac { grid-template-columns: 1fr; }
  .caps { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .ab-inds { grid-template-columns: 1fr 1fr; }

  .ct-form__row { grid-template-columns: 1fr; gap: 16px; }
  .ct-form__alt { flex-direction: column; align-items: flex-start; gap: 12px; }

  .dl-row { flex-wrap: wrap; gap: 12px; }
  .dl-main { flex: 1 1 100%; order: 2; }
  .dl-act { order: 3; margin-left: auto; }
  .dl-type { order: 1; }
  .dl-ask { padding: 24px; }

  .foot { padding-top: 44px; }
  .foot__cols { gap: 28px 40px; }
  .foot__bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* ---------- ≤560：单列 ---------- */
@media (max-width: 560px) {
  .hero h1 { font-size: 28px; }
  .hero__metrics { gap: 24px; }
  .metric b { font-size: 18px; }
  .torque__read b { font-size: 40px; }
  .torque__foot { gap: 24px; }

  .prod-card__img { flex-basis: 38%; padding: 10px; }
  .parts__card { grid-template-columns: 1fr; }

  .entries { grid-template-columns: 1fr; }
  .ab-inds { grid-template-columns: 1fr; }
  .ab-inds__item { height: 84px; }

  .pd__model { font-size: 32px; }
  .pd__thumbs { gap: 8px; }
  .pd__thumb { width: 68px; height: 68px; }

  .cta-bar__act { flex-direction: column; align-items: flex-start; gap: 16px; }
  .cta-bar__act .btn { width: 100%; }

  .dl-tabs { gap: 6px; }
  .dl-tab { height: 30px; padding: 0 10px; font-size: 12px; }

  /* 资质墙：手机上竖滑比横滑好找，执照独占一行 */
  .cred {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    overflow: visible;
    padding-bottom: 0;
  }
  .cred__item,
  .cred__item--tall,
  .cred__item--wide { width: 100%; }
  .cred__item--wide { grid-column: 1 / -1; }
  /* 张数为奇数时最后一张独占一行，避免右侧空半格 */
  .cred__item:last-child { grid-column: 1 / -1; }
  .cred__box { height: 190px; }
  .cred__item--wide .cred__box { height: 200px; }
  .cred__item:last-child .cred__box { height: 160px; }
  .cred__name { font-size: 13px; }

  .foot__copy { flex-direction: column; gap: 6px; }

  /* 新闻列表：日期从左侧栏改为标题上方一行 */
  .news-item {
    flex-direction: column;
    gap: 10px;
    padding: 22px 0;
  }
  .news-item__date { flex: none; padding-top: 0; }
  .news-item__go { display: none; }
  .news-item h3 { font-size: 15.5px; }
  .news-item p { font-size: 13px; }
  .news-ask { flex-direction: column; align-items: flex-start; gap: 16px; }
  .news-ask .btn { width: 100%; }
  .article__foot { flex-direction: column; align-items: flex-start; }
  /* 手机上表格满宽 —— 桌面用的 55% 下限在这里只有 170px，两列会挤成一团 */
  .article__table table { width: 100%; min-width: 0; }
  .article__table th,
  .article__table td { padding: 9px 10px; font-size: 12px; }

  /* 对比表压到能放下：默认左右 20px 内边距在 6 列上要吃掉 240px。
     nowrap 是关键 —— 不加的话 375px 下 "0.01–0.1" 会被折成 "0.01-" / "0.1"，
     读者容易当成两个值。宁可让表格在 .compare__scroll 里横滑，也不要折断数值。 */
  .compare th,
  .compare td {
    padding: 10px 8px;
    white-space: nowrap;
  }
  .compare table { font-size: 12px; }
}

/* --- 404 --- */
@media (max-width: 900px) {
  .nf { padding: 72px 32px 88px; }
  .nf__code { font-size: 112px; }
  .nf__title { font-size: 30px; }
}

@media (max-width: 560px) {
  .nf { padding: 56px 20px 72px; }
  .nf__code { font-size: 88px; }
  .nf__title { font-size: 24px; }
  .nf__desc { font-size: 15px; margin-top: 12px; }
  .nf__grid { grid-template-columns: 1fr; gap: 10px; margin-top: 32px; }
  .nf__card { padding: 20px 20px; }
  .nf__foot { font-size: 14px; margin-top: 28px; }
}