@media (min-width: 961px) and (max-height: 800px) {
  .factory .section__inner {
    padding-top: calc(var(--header-height) + 30px);
    padding-bottom: 34px;
  }

  .factory .screen-index {
    top: calc(var(--header-height) + 16px);
  }

  .factory__copy {
    margin-top: 20px;
    line-height: 1.72;
  }

  .factory .process-list {
    margin-top: 24px;
  }

  .factory .process-list li {
    min-height: 54px;
  }

  .about .section__inner {
    padding-top: calc(var(--header-height) + 34px);
    padding-bottom: 42px;
  }

  .about .screen-index {
    top: calc(var(--header-height) + 18px);
  }

  .contact-block {
    margin-top: 24px;
    padding-top: 18px;
  }

  .contact-block__phones {
    margin-top: 12px;
  }

  .contact-block__phones a {
    min-height: 48px;
  }

  .contact-block__qr {
    margin-top: 14px;
  }

  .contact-block__qr img {
    width: 88px;
  }

  .timeline__stage {
    min-height: 350px;
  }

  .timeline__rail {
    margin-top: 12px;
  }
}

@media (max-width: 1180px) {
  :root {
    --shell: min(100% - 40px, 1120px);
  }

  .site-header__nav {
    gap: 18px;
  }

  .site-header__actions {
    display: none;
  }

  .hero__grid {
    grid-template-columns: minmax(330px, 0.88fr) minmax(440px, 1.12fr);
    gap: 44px;
  }

  .factory__grid,
  .about__grid {
    gap: 54px;
  }

  .timeline__rail {
    overflow-x: auto;
    grid-template-columns: repeat(var(--timeline-year-count, 10), 52px);
    padding-bottom: 6px;
  }

  .subpage-hero__grid {
    grid-template-columns: 100px minmax(360px, 1.2fr) minmax(260px, 0.8fr);
    gap: 34px;
  }

  .section-intro {
    grid-template-columns: 130px minmax(360px, 1fr) minmax(250px, 0.7fr);
    gap: 36px;
  }

}

@media (max-width: 960px) {
  .section,
  .section__inner {
    min-height: auto;
  }

  .section__inner {
    padding-top: calc(var(--header-height) + 86px);
    padding-bottom: 88px;
  }

  .screen-index {
    top: calc(var(--header-height) + 26px);
  }

  .hero__grid,
  .factory__grid,
  .about__grid {
    grid-template-columns: 1fr;
  }

  .hero__grid {
    gap: 48px;
  }

  .hero__copy {
    max-width: 680px;
    padding-top: 18px;
  }

  .hero h1 {
    max-width: 8.5em;
  }

  .hero__media {
    height: min(66svh, 680px);
    min-height: 480px;
  }

  .hero__footer {
    position: static;
    margin-top: -20px;
  }

  .process-spine {
    display: none;
  }

  .factory__grid,
  .about__grid {
    gap: 58px;
  }

  .factory__intro,
  .about__intro {
    max-width: 650px;
  }

  .section-title {
    max-width: 9em;
  }

  .timeline__stage {
    min-height: 520px;
  }

  .site-footer {
    position: static;
    grid-column: 1;
    margin-top: 24px;
  }

  .subpage-hero {
    min-height: auto;
  }

  .subpage-hero__grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .subpage-hero__grid .screen-index {
    display: none;
  }

  .subpage-hero__lead {
    max-width: 560px;
  }

  .page-brief {
    grid-template-columns: 1fr 1.4fr;
  }

  .page-brief > a {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line-light);
    border-left: 0;
  }

  .section-intro {
    grid-template-columns: 1fr 1fr;
  }

  .section-intro .section-label {
    grid-column: 1 / -1;
  }

  .step-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .step-card:nth-child(3) {
    border-left: 0;
  }

  .step-card:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .requirement-section__inner {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-block: 72px;
  }

  .requirement-intro {
    position: static;
    max-width: 660px;
  }

  .requirement-intro h2 span {
    display: inline;
  }

  .form-header {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .form-header > p {
    max-width: 36em;
  }

  .requirement-output {
    grid-column: 1;
  }

  .journal-toolbar {
    grid-template-columns: 1fr;
  }

  .news-filters {
    justify-content: flex-start;
  }

  .news-empty {
    grid-template-columns: 80px 1fr;
    align-items: start;
  }

  .news-empty h2 span {
    display: inline;
  }

  .news-empty > p {
    grid-column: 2;
  }

  .news-empty__frame {
    grid-column: 2;
  }

  .journal-boundary {
    grid-template-columns: 1fr;
  }

  .journal-boundary a {
    grid-column: 1;
    justify-self: end;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 68px;
    --shell: min(100% - 36px, 760px);
  }

  .site-header__bar {
    display: flex;
    justify-content: space-between;
  }

  .site-header__actions {
    display: none;
  }

  .menu-toggle {
    position: relative;
    z-index: 3;
    display: block;
  }

  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .site-header__nav {
    position: fixed;
    inset: var(--header-height) 0 0;
    z-index: 2;
    display: none;
    max-height: calc(100dvh - var(--header-height));
    padding: 24px 18px 36px;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: #050505;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav a {
    width: 100%;
    min-height: 64px;
    padding: 16px 0;
    display: flex;
    align-items: center;
    color: var(--paper);
    border-top: 1px solid var(--line-light);
    font-size: 16px;
    font-weight: 580;
    letter-spacing: 0;
  }

  .site-header__nav a:last-child {
    border-bottom: 1px solid var(--line-light);
  }

  .site-header__nav a::after {
    display: none;
  }

  .site-header__nav a.is-active,
  .site-header__nav a[aria-current="page"] {
    color: #d89570;
  }

  .jf-editorial-hero {
    height: calc(100svh - var(--header-height));
    min-height: 650px;
    max-height: none;
  }

  .jf-editorial-hero::after {
    background: rgba(0, 0, 0, 0.3);
  }

  .jf-editorial-hero__image {
    object-position: 62% center;
  }

  .jf-editorial-hero__copy {
    width: 68%;
  }

  .jf-editorial-hero__copy h1 {
    font-size: clamp(46px, 8vw, 66px);
  }

}

@media (max-width: 620px) {
  :root {
    --header-height: 68px;
    --shell: calc(100% - 32px);
  }

  body {
    font-size: 15px;
  }

  .section__inner {
    padding-top: calc(var(--header-height) + 78px);
    padding-bottom: 72px;
  }

  .screen-index {
    top: calc(var(--header-height) + 22px);
  }

  .jf-editorial-hero {
    min-height: 630px;
  }

  .jf-editorial-hero__content {
    align-items: flex-end;
    padding-bottom: 102px;
  }

  .jf-editorial-hero__copy {
    width: 100%;
  }

  .jf-editorial-hero__copy h1 {
    margin: 20px 0;
    font-size: clamp(39px, 11.2vw, 54px);
    line-height: 1.13;
  }

  .jf-editorial-hero__lead {
    max-width: 520px;
    font-size: 13px;
    line-height: 1.75;
  }

  .jf-editorial-hero__lead-primary {
    font-size: 15px;
    line-height: 1.55;
  }

  .jf-editorial-hero__lead-secondary {
    --lead-rule-offset: 11px;
    padding-left: 0;
    font-size: 12.5px;
    line-height: 1.75;
  }

  .about__copy {
    gap: 15px;
  }

  .jf-editorial-hero__footer strong {
    max-width: 155px;
    text-align: right;
  }

  .hero h1 {
    margin-block: 24px;
    font-size: clamp(46px, 14.5vw, 64px);
    line-height: 1.03;
  }

  .hero__lead {
    font-size: 15px;
  }

  .button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .hero__media {
    height: 56svh;
    min-height: 390px;
  }

  .media-code {
    font-size: 6px;
  }

  .hero__footer {
    display: none;
  }

  .section-title {
    font-size: clamp(40px, 12vw, 56px);
  }

  .process-list li {
    grid-template-columns: 34px 1fr;
  }

  .process-list small {
    display: none;
  }

  .factory-gallery__caption {
    align-items: start;
    flex-direction: column;
    gap: 4px;
  }

  .factory-gallery__thumbs {
    grid-template-columns: repeat(4, minmax(116px, 1fr));
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }

  .factory-gallery__thumbs::-webkit-scrollbar {
    display: none;
  }

  .contact-block__qr {
    grid-template-columns: 88px 1fr;
  }

  .contact-block__qr img {
    width: 88px;
  }

  .timeline__heading {
    display: grid;
    gap: 6px;
  }

  .timeline__stage {
    min-height: 430px;
  }

  .timeline__overlay {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .timeline__year {
    font-size: clamp(62px, 23vw, 92px);
  }

  .site-footer {
    display: grid;
    gap: 5px;
  }

  .subpage-hero__inner {
    padding-top: 30px;
  }

  .subpage-hero__grid {
    margin-top: 66px;
  }

  .subpage-hero h1 {
    font-size: clamp(50px, 16vw, 72px);
  }

  .page-brief {
    grid-template-columns: 1fr;
  }

  .page-brief > * + * {
    border-top: 1px solid var(--line-light);
    border-left: 0;
  }

  .section-intro {
    grid-template-columns: 1fr;
  }

  .section-intro .section-label {
    grid-column: auto;
  }

  .step-flow {
    grid-template-columns: 1fr;
  }

  .step-card,
  .step-card + .step-card {
    min-height: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .step-card:first-child {
    border-top: 0;
  }

  .step-card h3 {
    margin-top: 42px;
  }

  .requirement-section__inner {
    gap: 52px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-field--wide {
    grid-column: auto;
  }

  .form-grid textarea,
  .form-field--notes textarea {
    height: 112px;
  }

  .form-grid > label,
  .form-grid > fieldset,
  .form-grid__section {
    padding: 18px 16px;
  }

  .form-field--notes textarea {
    height: 86px;
  }

  .form-data-block > textarea {
    height: 124px;
  }

  .form-grid__section h3 {
    font-size: 18px;
  }

  .form-grid__section p,
  .field-help {
    font-size: 11px;
  }

  .choice-list--status {
    display: grid;
    grid-template-columns: 1fr;
  }

  .form-header h2 {
    font-size: clamp(25px, 7vw, 34px);
  }

  .form-grid__section {
    padding-block: 14px;
  }

  .requirement-output {
    padding: 22px 16px;
  }

  .requirement-output textarea {
    padding: 14px;
    font-size: 10px;
  }

  .news-filters {
    gap: 16px;
  }

  .news-empty {
    min-height: 0;
    padding: 30px 22px;
    grid-template-columns: 1fr;
  }

  .news-empty__index,
  .news-empty > p,
  .news-empty__frame {
    grid-column: 1;
  }

  .news-empty__frame {
    min-height: 220px;
  }

  .journal-boundary {
    grid-template-columns: 1fr;
  }

  .journal-boundary a {
    grid-column: 1;
  }

  .subpage-footer {
    padding-inline: 16px;
  }
}

@media (max-width: 560px) {
  :root {
    --shell: calc(100vw - 28px);
  }

}

/* ===== 甲方反馈修订 2026-08-23 ===== */

@media (max-width: 620px) {
  .contact-block__split {
    gap: 14px;
  }

  .contact-block__split .contact-block__qr {
    grid-template-columns: 88px 1fr;
  }

  .contact-block__split .contact-block__qr img {
    width: 88px;
  }

  .hero-cta {
    gap: 12px 16px;
    margin-top: 24px;
  }

  .hero-cta .button {
    width: auto;
    min-height: 50px;
  }

}

@media (max-width: 420px) {
  .contact-block__split {
    grid-template-columns: 1fr;
  }
}

/* ===== 关于九发布局重构 2026-08-25 ===== */

@media (min-width: 961px) {
  .about__lower .timeline__stage {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }

  .about__contact .contact-map__visual img {
    aspect-ratio: 16 / 8.6;
  }
}

@media (max-width: 960px) {
  .about__intro {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .about__intro .about__copy {
    margin-top: 22px;
  }

  .about__lower {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .about__lower .timeline {
    height: auto;
  }

  .about__lower .timeline__stage {
    min-height: 520px;
    aspect-ratio: auto;
  }

  .about__lower .timeline__rail {
    margin-top: 19px;
  }

  .about__contact .contact-map__visual img {
    aspect-ratio: 16 / 10;
  }
}

@media (max-width: 620px) {
  .about__lower .timeline__stage {
    min-height: 430px;
  }
}