:root {
  --navy: #0b1f33;
  --black: #050505;
  --black-soft: #090909;
  --graphite: #20262c;
  --paper: #f1efe9;
  --paper-bright: #f7f5ef;
  --aluminum: #a9b1b7;
  --copper: #c96a3d;
  --copper-light: #d89570;
  --copper-dark: #9c4d2a;
  --manual-blue: #435fae;
  --white: #ffffff;
  --ink-muted: #66615a;
  --line: rgba(23, 23, 23, 0.18);
  --line-strong: rgba(23, 23, 23, 0.55);
  --line-light: rgba(255, 255, 255, 0.18);
  --header-height: 86px;
  --shell: min(1440px, calc(100vw - 64px));
  --page-pad: max(32px, calc((100vw - 1440px) / 2));
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  /* First+ 在 Safari 的实际可见字形：拉丁 Times，中文回退至宋体。 */
  --font-sans: Times, "Times New Roman", "Songti SC", STSong, SimSun, serif;
  --font-mono: Times, "Times New Roman", "Songti SC", STSong, SimSun, serif;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--graphite);
  background: var(--paper);
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  text-rendering: optimizeLegibility;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--graphite);
  background:
    linear-gradient(rgba(11, 31, 51, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 31, 51, 0.022) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  border-radius: 0;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

img {
  display: block;
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

::selection {
  color: var(--white);
  background: var(--copper);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: #050505;
  border-bottom: 1px solid rgba(244, 241, 232, 0.14);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header__bar {
  height: 100%;
  align-items: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
}

.site-header__brand {
  display: inline-flex;
  justify-self: start;
  color: #f4f1e8;
}

.site-header__wordmark {
  display: block;
  font-size: clamp(20px, 1.5vw, 26px);
  font-weight: 620;
  letter-spacing: 0.12em;
  line-height: 1;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 2.4vw, 40px);
}

.site-header__nav a {
  position: relative;
  display: block;
  color: #f4f1e8;
  font-size: 12px;
  font-weight: 620;
  letter-spacing: 0.08em;
  line-height: normal;
  white-space: nowrap;
  transition: color 180ms ease;
}

.site-header__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -12px;
  width: 100%;
  height: 1px;
  background: #f4f1e8;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-header__nav a:hover,
.site-header__nav a.is-active,
.site-header__nav a[aria-current="page"] {
  color: var(--white);
}

.site-header__nav a:hover::after,
.site-header__nav a:focus-visible::after,
.site-header__nav a.is-active::after,
.site-header__nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 22px;
}

.jf-header-button {
  min-width: 116px;
  min-height: 42px;
  padding: 8px 16px;
  display: inline-flex;
  align-items: flex-start;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  color: #111111;
  background: #f4f1e8;
  border: 1px solid #f4f1e8;
  line-height: normal;
  transition: background 180ms ease, border-color 180ms ease;
}

.jf-header-button:hover,
.jf-header-button:focus-visible {
  background: #ffffff;
  border-color: #ffffff;
}

.jf-header-button.is-active {
  background: #d89570;
  border-color: #d89570;
}

.jf-header-button > span {
  font-size: 12px;
  font-weight: 700;
  line-height: 1.15;
}

.jf-header-button > small {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: normal;
  opacity: 0.62;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  color: var(--paper);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  margin: 7px auto;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.section {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
}

.section__inner {
  position: relative;
  z-index: 2;
  width: var(--shell);
  min-height: 100svh;
  margin-inline: auto;
  padding: calc(var(--header-height) + clamp(52px, 6vh, 80px)) 0 clamp(72px, 8vh, 104px);
}

.screen-index {
  position: absolute;
  top: calc(var(--header-height) + 26px);
  left: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--graphite);
}

.screen-index span,
.screen-index small {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 620;
  letter-spacing: 0.12em;
}

.screen-index i {
  width: 46px;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}

.screen-index small {
  color: inherit;
  opacity: 0.54;
}

.screen-index--light {
  color: var(--paper);
}

.hero {
  color: var(--white);
  background: var(--black);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(circle at 64% 46%, transparent 0 26%, rgba(0, 0, 0, 0.2) 66%, rgba(0, 0, 0, 0.48) 100%);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(360px, 0.82fr) minmax(520px, 1.18fr);
  gap: clamp(44px, 6vw, 96px);
  align-items: center;
}

.hero__copy {
  position: relative;
  z-index: 3;
  align-self: center;
  padding-bottom: 18px;
}

.hero__kicker,
.section-label,
.archive-label {
  margin: 0;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.18em;
  line-height: 1.5;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 9em;
  margin: 28px 0;
  color: var(--white);
  font-size: clamp(54px, 5.5vw, 86px);
  font-weight: 620;
  letter-spacing: -0.052em;
  line-height: 1.08;
}

.hero h1 span {
  display: block;
}

.hero__lead {
  max-width: 34em;
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.9;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__actions {
  margin-top: 38px;
}

.button {
  min-height: 52px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms var(--ease-out);
}

.button b {
  font-size: 15px;
  font-weight: 500;
}

.button:hover {
  transform: translateY(-2px);
}

.button--copper {
  color: var(--white);
  background: var(--copper-dark);
}

.button--copper:hover {
  background: #7f3f22;
}

.button--light {
  color: var(--paper);
  background: transparent;
  border-color: rgba(244, 241, 232, 0.42);
}

.button--light:hover {
  background: rgba(244, 241, 232, 0.08);
  border-color: var(--paper);
}

.button--navy {
  color: var(--paper);
  background: var(--navy);
}

.hero__media {
  position: relative;
  height: min(72svh, 760px);
  min-height: 520px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-light);
  background: #111;
  isolation: isolate;
}

.hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.52), transparent 34%),
    linear-gradient(180deg, rgba(5, 5, 5, 0.2), transparent 28%, rgba(5, 5, 5, 0.72));
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 48% 52%;
  filter: grayscale(0.42) saturate(0.66) contrast(1.1);
  transition: transform 1.2s var(--ease-out), filter 360ms ease;
}

.hero__media:hover img {
  transform: scale(1.018);
  filter: grayscale(0.25) saturate(0.74) contrast(1.08);
}

.media-code {
  position: absolute;
  inset: 0 0 auto;
  z-index: 4;
  min-height: 38px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.64);
  background: rgba(5, 5, 5, 0.72);
  border-bottom: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.12em;
}

.media-code b {
  color: var(--copper-light);
  font-weight: 600;
}

.hero__caption {
  position: absolute;
  z-index: 4;
  right: 18px;
  bottom: 15px;
  margin: 0;
  color: rgba(255, 255, 255, 0.64);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.hero__footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 25px;
  z-index: 4;
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 580;
  letter-spacing: 0.13em;
}

.process-spine {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 51px;
  z-index: 4;
  height: 28px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.process-spine::before,
.process-spine::after {
  content: "";
  position: absolute;
  top: 14px;
  left: 0;
  height: 1px;
}

.process-spine::before {
  right: 0;
  background: rgba(255, 255, 255, 0.17);
}

.process-spine::after {
  width: 33.333%;
  background: var(--copper);
}

.process-spine span {
  position: relative;
  z-index: 2;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.46);
  background: var(--black);
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-family: var(--font-mono);
  font-size: 7px;
}

.process-spine span:first-child {
  color: var(--paper);
  border-color: var(--copper);
}

/* First+ 首页首屏：结构、影像、字号和节奏直接来自 First+。 */
.jf-page-shell {
  width: var(--shell);
  margin-inline: auto;
}

.jf-editorial-hero {
  position: relative;
  height: calc(100svh - var(--header-height));
  min-height: 620px;
  max-height: 940px;
  margin-top: 0;
  overflow: hidden;
  color: var(--white);
  background: var(--black);
}

.jf-editorial-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.08);
}

.jf-editorial-hero__image {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  filter: saturate(0.72) contrast(1.04);
}

.jf-editorial-hero__content {
  position: relative;
  z-index: 1;
  height: 100%;
  padding-bottom: 52px;
  display: flex;
  align-items: center;
}

.jf-editorial-hero__copy {
  width: 48%;
  max-width: 660px;
}

.jf-editorial-hero__copy h1 {
  margin: 28px 0;
  color: var(--white);
  font-size: clamp(52px, 4.35vw, 72px);
  font-weight: 620;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.jf-editorial-hero__copy h1 span {
  display: block;
}

.jf-editorial-hero__lead {
  max-width: 540px;
  margin: 0;
  display: grid;
  gap: 14px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.8;
}

.jf-editorial-hero__lead-primary,
.jf-editorial-hero__lead-secondary {
  display: block;
}

.jf-editorial-hero__lead-primary {
  max-width: 30em;
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.55;
  letter-spacing: 0.01em;
}

.jf-editorial-hero__lead-secondary {
  --lead-rule-offset: 14px;
  position: relative;
  max-width: 35em;
  padding-left: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.82;
}

.jf-editorial-hero__lead-secondary::before {
  content: "";
  position: absolute;
  top: 0.12em;
  bottom: 0.12em;
  left: calc(-1 * var(--lead-rule-offset));
  width: 1px;
  background: rgba(255, 255, 255, 0.42);
}

.jf-editorial-hero__footer {
  position: absolute;
  left: 50%;
  bottom: 26px;
  z-index: 1;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}

.jf-editorial-hero__footer strong {
  color: rgba(255, 255, 255, 0.68);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 550;
  letter-spacing: 0.15em;
}

.factory {
  color: var(--graphite);
  background: var(--paper);
}

.factory__grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(56px, 7vw, 112px);
  align-items: start;
}

.factory__intro {
  padding-bottom: 8px;
}

.section-title {
  max-width: 10em;
  margin: 24px 0 0;
  color: var(--navy);
  font-size: clamp(44px, 4.55vw, 68px);
  font-weight: 590;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.section-copy {
  max-width: 37em;
  margin: 28px 0 0;
  color: var(--ink-muted);
  font-size: clamp(14px, 1.08vw, 16px);
  line-height: 1.9;
}

.process-list {
  margin: clamp(34px, 4vw, 56px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.process-list li {
  min-height: 62px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  transition: padding 180ms ease, background 180ms ease;
}

.process-list li:hover {
  padding-inline: 12px;
  background: rgba(23, 23, 23, 0.035);
}

.process-list span,
.process-list small {
  color: var(--copper-dark);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 620;
  letter-spacing: 0.1em;
}

.process-list strong {
  color: #24211e;
  font-size: 15px;
  font-weight: 590;
}

.process-list small {
  color: #868078;
  font-size: 7px;
}

.factory-gallery {
  position: relative;
  min-width: 0;
}

.factory-gallery__frame {
  border: 1px solid var(--line-strong);
  background: var(--black-soft);
}

.factory-gallery__stage {
  position: relative;
  aspect-ratio: 16 / 9.6;
  overflow: hidden;
  background: #dedcd6;
}

.factory-gallery__stage::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 58%, rgba(5, 5, 5, 0.76));
}

.factory-gallery__stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.5) saturate(0.5) contrast(1.05);
  transition: opacity 220ms ease, transform 640ms var(--ease-out), filter 220ms ease;
}

.factory-gallery__stage:hover img {
  transform: scale(1.03);
  filter: grayscale(0) saturate(1.12) brightness(1.05) contrast(1);
}

.factory-gallery__caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 15px;
  z-index: 3;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  color: var(--white);
}

.factory-gallery__caption span {
  font-size: 13px;
  font-weight: 600;
}

.factory-gallery__caption small,
.factory-gallery__meta {
  color: rgba(255, 255, 255, 0.54);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.11em;
}

.factory-gallery__meta {
  min-height: 40px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.48);
  border-top: 1px solid var(--line-light);
}

.factory-gallery__meta b {
  color: var(--copper-light);
  font-weight: 600;
}

.factory-gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.gallery-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  padding: 0;
  overflow: hidden;
  border: 1px solid transparent;
  background: #dedcd6;
  cursor: pointer;
  transition: border-color 160ms ease;
}

.gallery-thumb[aria-pressed="true"] {
  border-color: var(--copper-dark);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.78) saturate(0.3) contrast(0.96);
  opacity: 0.6;
  transition: filter 180ms ease, opacity 180ms ease, transform 300ms var(--ease-out);
}

.gallery-thumb:hover img,
.gallery-thumb[aria-pressed="true"] img {
  filter: grayscale(0) saturate(1.04) brightness(1.02);
  opacity: 1;
  transform: scale(1.03);
}

.gallery-thumb span {
  position: absolute;
  left: 8px;
  bottom: 6px;
  z-index: 2;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 8px;
}

.about {
  color: var(--white);
  background: var(--black-soft);
}

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(58px, 7vw, 96px);
  align-items: start;
}

.about__intro {
  display: grid;
  grid-template-columns: minmax(220px, 0.64fr) minmax(0, 1.36fr);
  gap: clamp(42px, 5.5vw, 88px);
  align-items: start;
}

.about__intro .section-title {
  margin-top: 0;
}

.about__copy {
  max-width: 62em;
  margin-top: 0;
}

.about__lower {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(42px, 5.5vw, 88px);
  align-items: stretch;
}

.about__contact {
  min-width: 0;
  display: flex;
}

.about__contact .contact-block {
  width: 100%;
  margin-top: 0;
  padding-top: 22px;
  display: flex;
  flex-direction: column;
}

.about__contact .contact-block .button-row {
  margin-top: auto;
  padding-top: 20px;
}

.about .section-title {
  color: var(--paper);
  font-size: clamp(30px, 2.9vw, 44px);
}

.about__copy {
  color: rgba(244, 241, 232, 0.9);
  font-size: clamp(15px, 1.15vw, 17px);
  display: grid;
  gap: 18px;
}

.about__copy p {
  margin: 0;
}

.contact-block {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line-light);
}

.contact-block__phones {
  margin-top: 18px;
  border-top: 1px solid var(--line-light);
}

.contact-block__phones a {
  min-height: 52px;
  display: grid;
  grid-template-columns: 30px 1fr auto;
  align-items: center;
  border-bottom: 1px solid var(--line-light);
  transition: padding 180ms ease, background 180ms ease;
}

.contact-block__phones a:hover {
  padding-inline: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.contact-block__phones small,
.contact-block__phones span {
  font-family: var(--font-mono);
}

.contact-block__phones small {
  color: var(--copper-light);
  font-size: 8px;
}

.contact-block__phones span {
  color: var(--paper);
  font-size: clamp(15px, 1.3vw, 19px);
  letter-spacing: 0.02em;
}

.contact-block__phones b {
  color: var(--copper-light);
  font-weight: 500;
}

.contact-block__qr {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 98px 1fr;
  gap: 16px;
  align-items: center;
}

.contact-block__qr img {
  width: 98px;
  aspect-ratio: 1;
  padding: 4px;
  object-fit: cover;
  background: var(--white);
}

.contact-block__qr p {
  margin: 0;
  display: grid;
  gap: 5px;
}

.contact-block__qr strong {
  color: var(--paper);
  font-size: 13px;
  font-weight: 600;
}

.contact-block__qr span {
  max-width: 18em;
  color: rgba(244, 241, 232, 0.58);
  font-size: 11px;
  line-height: 1.7;
}

.contact-block .button-row {
  margin-top: 20px;
}

.timeline {
  min-width: 0;
}

.about__lower .timeline {
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-light);
  padding-top: 22px;
}

.about__lower .timeline__rail {
  margin-top: auto;
}

.timeline__heading {
  min-height: 30px;
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 20px;
}

.timeline__status {
  margin: 0;
  color: rgba(244, 241, 232, 0.58);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.09em;
}

.timeline__stage {
  position: relative;
  min-height: clamp(390px, 52vh, 560px);
  overflow: hidden;
  background: #0e0e0e;
  border: 1px solid var(--line-light);
}

.about__lower .timeline__stage {
  min-height: 0;
  aspect-ratio: 16 / 9;
}

.timeline__image,
.timeline__placeholder {
  position: absolute;
  inset: 0;
}

.timeline__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(0.64) saturate(0.45) contrast(1.05);
  transition: opacity 360ms ease, filter 360ms ease, transform 640ms var(--ease-out);
}

.timeline__image[hidden] {
  display: none;
}

.timeline__image--secondary:not([hidden]) {
  object-position: center;
}

.timeline__image--secondary:not([hidden])[data-fit="contain"] {
  object-fit: contain;
  background: #fff;
}

.timeline__image[data-fit="contain"] {
  object-fit: contain;
  background: #0e0e0e;
}

.timeline__stage:hover .timeline__image {
  filter: grayscale(0.4) saturate(0.62) contrast(1.04);
  transform: none;
}

.timeline__placeholder {
  display: none;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    #0d0d0d;
  background-size: 32px 32px;
}

.timeline__placeholder.is-visible {
  display: flex;
}

.placeholder-frame {
  width: min(66%, 390px);
  aspect-ratio: 4 / 3;
  border: 1px solid rgba(244, 241, 232, 0.24);
}

.timeline__stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0.04) 62%, rgba(5, 5, 5, 0.62) 96%);
}

.timeline__year {
  margin: 0;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: clamp(58px, 7.5vw, 112px);
  font-weight: 620;
  letter-spacing: -0.07em;
  line-height: 0.78;
}

.timeline__title {
  margin: 0;
  color: var(--paper);
  font-size: clamp(18px, 1.6vw, 25px);
  font-weight: 580;
  line-height: 1.25;
}

.timeline__description {
  max-width: 36em;
  margin: 8px 0 0;
  color: rgba(244, 241, 232, 0.55);
  font-size: 12px;
  line-height: 1.7;
}

.timeline__counter {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 4;
  color: rgba(244, 241, 232, 0.58);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.timeline__counter span {
  color: var(--copper-light);
}

.timeline__carousel-controls {
  position: absolute;
  top: 28px;
  right: 14px;
  z-index: 4;
  padding: 4px 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(244, 241, 232, 0.64);
  background: rgba(5, 5, 5, 0.62);
  border: 1px solid rgba(244, 241, 232, 0.18);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.timeline__carousel-controls[hidden] {
  display: none;
}

.timeline__carousel-controls button {
  width: 40px;
  height: 40px;
  padding: 0;
  color: rgba(244, 241, 232, 0.78);
  background: rgba(5, 5, 5, 0.78);
  border: 1px solid rgba(244, 241, 232, 0.42);
  font: inherit;
  line-height: 1;
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.timeline__carousel-controls button:hover,
.timeline__carousel-controls button:focus-visible {
  color: var(--white);
  background: rgba(172, 75, 39, 0.72);
  border-color: var(--copper-light);
}

.timeline__carousel-controls b {
  color: var(--copper-light);
  font-weight: 500;
}

.timeline__rail {
  --timeline-progress: 0%;
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--timeline-year-count, 10), minmax(42px, 1fr));
  margin-top: 19px;
}

.timeline__rail::before,
.timeline__rail::after {
  content: "";
  position: absolute;
  left: 2%;
  top: 12px;
  height: 1px;
}

.timeline__rail::before {
  right: 2%;
  background: rgba(244, 241, 232, 0.2);
}

.timeline__rail::after {
  width: var(--timeline-progress);
  background: var(--copper);
  transition: width 420ms var(--ease-out);
}

.year-button {
  position: relative;
  z-index: 2;
  min-width: 42px;
  min-height: 48px;
  padding: 25px 0 0;
  color: rgba(244, 241, 232, 0.58);
  background: transparent;
  border: 0;
  font-family: var(--font-mono);
  font-size: 9px;
  cursor: pointer;
}

.year-button::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 7px;
  height: 7px;
  transform: translateX(-50%);
  background: var(--black-soft);
  border: 1px solid rgba(244, 241, 232, 0.58);
}

.year-button:hover,
.year-button[aria-current="true"] {
  color: var(--paper);
}

.year-button[aria-current="true"]::before {
  background: var(--copper);
  border-color: var(--copper);
}

.site-footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 21px;
  display: flex;
  justify-content: space-between;
  color: rgba(244, 241, 232, 0.54);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.site-footer a {
  color: inherit;
}

.subpage {
  min-height: 100svh;
  padding-top: 0;
  background: var(--paper);
}

.subpage-hero {
  position: relative;
  min-height: min(78svh, 760px);
  color: var(--white);
  background: var(--black);
  border-bottom: 1px solid var(--line-light);
  overflow: hidden;
}

.subpage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 86%);
  mask-image: linear-gradient(90deg, #000, transparent 86%);
}

.subpage-hero__inner,
.subpage-content,
.requirement-section__inner {
  position: relative;
  z-index: 2;
  width: var(--shell);
  margin-inline: auto;
}

.subpage-hero__inner {
  padding: clamp(40px, 5vw, 68px) 0 clamp(54px, 6vw, 84px);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(244, 241, 232, 0.4);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.breadcrumbs a {
  color: rgba(244, 241, 232, 0.65);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 5px;
}

.breadcrumbs a:hover {
  color: var(--copper-light);
  text-decoration-color: currentColor;
}

.breadcrumbs strong {
  color: rgba(244, 241, 232, 0.48);
  font-weight: 500;
}

.subpage-hero__grid {
  position: relative;
  margin-top: clamp(62px, 8vw, 112px);
  display: grid;
  grid-template-columns: 140px minmax(420px, 1.25fr) minmax(300px, 0.75fr);
  gap: clamp(34px, 5vw, 80px);
  align-items: end;
}

.subpage-hero__grid .screen-index {
  position: static;
  align-self: start;
  margin-top: 8px;
}

.subpage-hero h1 {
  max-width: 8em;
  margin: 25px 0 0;
  color: var(--white);
  font-size: clamp(54px, 6.5vw, 96px);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.subpage-hero__lead {
  margin: 0;
  color: rgba(244, 241, 232, 0.64);
  font-size: clamp(14px, 1.2vw, 17px);
  line-height: 1.9;
}

.page-brief {
  margin-top: clamp(54px, 6vw, 80px);
  display: grid;
  grid-template-columns: minmax(220px, 0.88fr) minmax(390px, 1.5fr) minmax(220px, 0.62fr);
  border-top: 1px solid rgba(244, 241, 232, 0.5);
  border-bottom: 1px solid rgba(244, 241, 232, 0.5);
}

.page-brief > * {
  min-width: 0;
  padding: 20px 22px;
}

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

.page-brief small {
  display: block;
  margin-bottom: 10px;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-brief strong {
  color: rgba(244, 241, 232, 0.8);
  font-size: 12px;
  font-weight: 560;
  line-height: 1.65;
}

.page-brief ol {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 5px;
  list-style: none;
}

.page-brief li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 8px;
  color: rgba(244, 241, 232, 0.58);
  font-size: 10px;
  line-height: 1.5;
}

.page-brief li span {
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 8px;
}

.page-brief > a {
  display: grid;
  grid-template-columns: 1fr auto;
  align-content: center;
  color: var(--black);
  background: var(--paper);
  transition: background 180ms ease;
}

.page-brief > a:hover {
  background: var(--copper-light);
}

.page-brief > a small {
  grid-column: 1 / -1;
  color: var(--copper-dark);
}

.page-brief > a strong {
  color: var(--black);
}

.subpage-content {
  padding: clamp(80px, 9vw, 136px) 0;
}

.section-intro {
  display: grid;
  grid-template-columns: 160px minmax(420px, 1fr) minmax(300px, 0.7fr);
  gap: clamp(34px, 5vw, 80px);
  align-items: start;
  margin-bottom: clamp(54px, 6vw, 82px);
}

.section-intro h2,
.requirement-intro h2,
.journal-toolbar h2,
.requirement-output h2 {
  margin: -8px 0 0;
  color: var(--navy);
  font-size: clamp(38px, 4vw, 60px);
  font-weight: 590;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.section-intro > p:last-child {
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.9;
}

.step-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.step-card {
  min-height: 288px;
  padding: 28px 30px 32px;
}

.step-card + .step-card {
  border-left: 1px solid var(--line);
}

.step-card__number {
  display: block;
  color: var(--copper-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.1em;
}

.step-card > small {
  display: block;
  margin-top: 5px;
  color: #8a857f;
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.1em;
}

.step-card h3 {
  margin: 66px 0 15px;
  color: #24211e;
  font-size: clamp(20px, 1.8vw, 26px);
  font-weight: 580;
  line-height: 1.2;
}

.step-card p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.8;
}

.requirement-section {
  min-height: calc(100svh - var(--header-height) - 82px);
  color: var(--white);
  background: var(--black-soft);
  scroll-margin-top: var(--header-height);
}

.customization-page {
  min-height: calc(100svh - var(--header-height) - 82px);
  background: var(--black-soft);
}

.requirement-section__inner {
  min-height: calc(100svh - var(--header-height) - 82px);
  padding: clamp(30px, 4.5vh, 54px) 0;
  display: grid;
  grid-template-columns: minmax(320px, 0.58fr) minmax(0, 1.42fr);
  gap: clamp(42px, 5vw, 78px);
  align-items: start;
}

.requirement-intro {
  position: sticky;
  top: calc(var(--header-height) + 30px);
}

.requirement-intro h2,
.requirement-output h2 {
  color: var(--paper);
}

.requirement-intro h2 {
  margin-top: 0;
}

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

.requirement-output h2 {
  margin-top: 26px;
}

.requirement-intro > p:not(.section-label),
.requirement-output > div > p:not(.section-label) {
  margin: 26px 0 0;
  color: rgba(244, 241, 232, 0.56);
  font-size: 14px;
  line-height: 1.9;
}

.process-summary {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line-light);
}

.process-summary__heading h3 {
  margin: 0;
  color: var(--paper);
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 580;
  line-height: 1.25;
}

.process-summary__heading > p {
  margin: 8px 0 0;
  color: rgba(244, 241, 232, 0.58);
  font-size: 11px;
  line-height: 1.6;
}

.process-summary ol {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--line-light);
}

.process-summary li {
  padding: 9px 0;
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  border-top: 1px solid var(--line-light);
}

.process-summary li > span {
  padding-top: 2px;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.1em;
}

.process-summary li strong {
  color: rgba(244, 241, 232, 0.84);
  font-size: 12px;
  font-weight: 600;
}

.process-summary li p {
  margin: 3px 0 0;
  color: rgba(244, 241, 232, 0.56);
  font-size: 10px;
  line-height: 1.5;
}

.requirement-form {
  min-width: 0;
}

.form-header {
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 0.55fr);
  gap: 24px;
  align-items: end;
}

.form-header .section-label {
  margin-bottom: 15px;
  color: var(--copper-light);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.form-header h2 {
  margin: 0;
  color: var(--paper);
  font-size: clamp(26px, 2.4vw, 38px);
  font-weight: 590;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.form-header > p {
  margin: 0;
  color: rgba(244, 241, 232, 0.56);
  font-size: 12px;
  line-height: 1.8;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}

.form-grid > label,
.form-grid > fieldset,
.form-grid__section {
  min-width: 0;
  padding: 21px 24px;
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  background: rgba(255, 255, 255, 0.018);
}

.form-grid > label {
  display: grid;
  gap: 10px;
}

.form-grid > fieldset {
  margin: 0;
  border: 0;
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.form-grid > label > span,
.form-grid > fieldset > legend {
  color: var(--copper-light);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.form-grid > fieldset > legend {
  padding: 0;
}

.form-grid > label > span small,
.form-grid > fieldset > legend small {
  margin-left: 5px;
  color: rgba(244, 241, 232, 0.62);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 450;
  letter-spacing: 0;
}

.form-grid__section {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(216, 149, 112, 0.075);
}

.form-grid__section-index {
  flex: 0 0 auto;
  padding-top: 2px;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.1em;
}

.form-grid__section h3 {
  margin: 0;
  color: var(--paper);
  font-size: 19px;
  font-weight: 590;
  line-height: 1.25;
}

.form-grid__section p,
.field-help {
  margin: 8px 0 0;
  color: rgba(244, 241, 232, 0.68);
  font-size: 12px;
  line-height: 1.75;
}

.field-help {
  margin-top: 9px;
}

.form-field--wide {
  grid-column: 1 / -1;
}

.choice-list {
  margin-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.choice {
  position: relative;
  min-width: 0;
  min-height: 44px;
  padding: 10px 15px;
  display: inline-flex;
  align-items: center;
  color: rgba(244, 241, 232, 0.7);
  border: 1px solid rgba(244, 241, 232, 0.2);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.choice span {
  color: inherit;
  font-size: 13px;
  line-height: 1.45;
}

.choice:focus-within {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

.choice:has(input:checked) {
  color: var(--paper);
  border-color: var(--copper-light);
  background: rgba(184, 92, 57, 0.2);
}

.choice-list--status .choice {
  flex: 1 1 220px;
}

.choice-list--stacked {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.choice-list--stacked .choice {
  width: 100%;
}

.field-error {
  min-height: 0;
  margin: 7px 0 0;
  color: #e09b78;
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1.4;
}

.form-field.has-error {
  background: rgba(173, 78, 51, 0.08);
}

.form-field.has-error .choice {
  border-color: rgba(224, 155, 120, 0.5);
}

.form-data-block .field-help {
  margin-top: 7px;
}

.form-data-block > textarea {
  height: 104px;
  margin-top: 14px;
}

.form-grid input,
.form-grid textarea {
  width: 100%;
  padding: 10px 0 9px;
  color: var(--paper);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(244, 241, 232, 0.24);
  outline: 0;
  resize: vertical;
  font-size: 15px;
  line-height: 1.7;
}

.form-grid textarea {
  min-height: 0;
  height: 104px;
}

.form-field--notes textarea {
  height: 78px;
}

.form-grid input::placeholder,
.form-grid textarea::placeholder {
  color: rgba(244, 241, 232, 0.66);
}

.form-grid input:focus,
.form-grid textarea:focus {
  border-bottom-color: var(--copper-light);
}

.form-grid input:focus-visible,
.form-grid textarea:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 4px;
}

.form-grid .choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.form-note {
  margin: 18px 0 0;
  color: rgba(244, 241, 232, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
}

.form-note > span {
  margin-right: 6px;
  color: var(--copper-light);
}

.form-note a {
  color: var(--copper-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.form-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.text-button {
  min-height: 44px;
  padding: 0;
  color: rgba(244, 241, 232, 0.54);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(244, 241, 232, 0.36);
  font-size: 11px;
  cursor: pointer;
}

.requirement-output {
  grid-column: 2;
  padding: clamp(26px, 3vw, 42px);
  border: 1px solid var(--line-light);
  background: #101010;
}

.requirement-output textarea {
  width: 100%;
  margin-top: 28px;
  padding: 20px;
  color: var(--graphite);
  background: var(--paper);
  border: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  resize: vertical;
}

.copy-status {
  min-height: 22px;
  margin: 12px 0 0;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 9px;
}

.news-page {
  min-height: calc(100svh - var(--header-height) - 82px);
}

.journal-section {
  min-height: calc(100svh - var(--header-height) - 82px);
  padding: clamp(26px, 4vh, 42px) 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.journal-toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  margin-bottom: clamp(20px, 3vh, 30px);
}

.journal-toolbar h2 {
  margin-top: 0;
}

.news-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 28px;
}

.news-filter {
  position: relative;
  min-height: 40px;
  padding: 0;
  color: #6e6962;
  background: transparent;
  border: 0;
  font-size: 12px;
  cursor: pointer;
}

.news-filter::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 2px;
  height: 1px;
  background: var(--copper-dark);
  transition: right 180ms var(--ease-out);
}

.news-filter:hover,
.news-filter.is-active {
  color: var(--navy);
}

.news-filter:hover::after,
.news-filter.is-active::after {
  right: 0;
}

.news-empty {
  min-height: clamp(270px, 35vh, 320px);
  padding: clamp(26px, 3.2vw, 46px);
  display: grid;
  grid-template-columns: 64px minmax(170px, 0.72fr) minmax(210px, 0.92fr) minmax(210px, 1fr);
  gap: clamp(24px, 3vw, 44px);
  align-items: center;
  color: var(--white);
  background: var(--black-soft);
}

.news-empty__index {
  align-self: start;
  display: grid;
  gap: 12px;
  color: rgba(244, 241, 232, 0.54);
  font-family: var(--font-mono);
}

.news-empty__index span {
  color: var(--copper-light);
  font-size: 11px;
}

.news-empty__index i {
  width: 46px;
  height: 1px;
  background: currentColor;
}

.news-empty__index small {
  font-size: 7px;
  letter-spacing: 0.1em;
}

.news-empty h2 {
  margin: 0;
  color: var(--paper);
  font-size: clamp(32px, 3.2vw, 48px);
  line-height: 1.12;
}

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

.news-empty > p {
  margin: 0;
  color: rgba(244, 241, 232, 0.54);
  font-size: 12px;
  line-height: 1.75;
}

.news-empty__frame {
  min-height: 160px;
  padding: 20px;
  display: grid;
  align-content: center;
  gap: 18px;
  color: rgba(244, 241, 232, 0.48);
  border: 1px solid var(--line-light);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 26px 26px;
  text-align: center;
}

.news-empty__frame span,
.news-empty__frame small {
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.1em;
}

.news-empty__frame strong {
  color: rgba(244, 241, 232, 0.7);
  font-size: 15px;
  font-weight: 520;
}

.journal-boundary {
  margin-top: 16px;
  padding: 14px 0;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.journal-boundary > span {
  color: var(--copper-dark);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.journal-boundary a {
  justify-self: end;
  padding-bottom: 4px;
  color: var(--navy);
  border-bottom: 1px solid var(--navy);
  font-size: 11px;
  font-weight: 620;
}

.subpage-footer {
  min-height: 82px;
  padding-inline: max(32px, calc((100vw - 1440px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(244, 241, 232, 0.56);
  background: var(--black);
  border-top: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.subpage-footer a {
  color: rgba(244, 241, 232, 0.72);
}

.effects-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
}

.effects-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 520ms var(--ease-out) var(--reveal-delay, 0ms), transform 520ms var(--ease-out) var(--reveal-delay, 0ms);
}


/* ===== 甲方反馈修订 2026-08-23 ===== */

.hero-cta {
  margin-top: 30px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 26px;
}

.hero-cta .button {
  min-height: 54px;
}


.timeline__info {
  margin: 0 0 20px;
  display: grid;
  grid-template-rows: auto minmax(36px, auto) minmax(48px, auto);
  min-height: 150px;
  align-content: start;
  gap: 7px;
}

@media (max-width: 620px) {
  .timeline__info {
    grid-template-rows: auto minmax(52px, auto) minmax(72px, auto);
    min-height: 174px;
  }
}

.timeline__info .timeline__year {
  margin: 0;
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: clamp(22px, 2vw, 30px);
  font-weight: 620;
  letter-spacing: -0.03em;
  line-height: 1;
}

.timeline__info .timeline__title {
  color: var(--paper);
  font-size: clamp(20px, 1.9vw, 28px);
  line-height: 1.28;
}

.timeline__info .timeline__description {
  margin: 0;
  color: rgba(244, 241, 232, 0.82);
  font-size: 14px;
  line-height: 1.7;
}

.contact-map {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.contact-map__visual {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-light);
}

.contact-map__visual {
  position: relative;
}

.contact-map__visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

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

.contact-map__pin {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, calc(-100% - 26px));
  padding: 5px 10px;
  color: #2d2d2d;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
  font-size: 12px;
  font-weight: 560;
  line-height: 1.2;
  white-space: nowrap;
  pointer-events: none;
}

.contact-map__pin::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(255, 255, 255, 0.96);
  border-bottom: 0;
}

.contact-map__meta {
  display: grid;
  gap: 4px;
}

.contact-map__meta strong {
  color: var(--paper);
  font-size: 14px;
  font-weight: 620;
}

.contact-map__meta small {
  color: rgba(244, 241, 232, 0.55);
  font-size: 11px;
}

.contact-block__split {
  margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 22px;
  align-items: start;
}

.contact-block__split .contact-block__phones {
  margin-top: 0;
}

.contact-block__split .contact-block__qr {
  margin-top: 0;
}

/* ===== 关于九发 v19 主次重排 2026-08-25 ===== */

@media (min-width: 961px) {
  .about__grid {
    grid-template-columns: minmax(270px, 0.74fr) minmax(0, 1.46fr);
    grid-template-rows: auto auto;
    grid-template-areas:
      "intro timeline"
      "contact timeline";
    column-gap: clamp(42px, 5.5vw, 88px);
    row-gap: clamp(42px, 5vw, 72px);
    align-items: start;
  }

  .about__intro {
    grid-area: intro;
    display: block;
    max-width: 34em;
  }

  .about__intro .section-title {
    margin-top: 0;
  }

  .about__intro .about__copy {
    max-width: 34em;
    margin-top: 28px;
    line-height: 1.88;
  }

  .about__contact {
    grid-area: contact;
    min-width: 0;
    display: block;
  }

  .about__contact .contact-block {
    width: 100%;
    margin-top: 0;
    padding-top: 20px;
    display: block;
  }

  .about__contact .contact-block .button-row {
    margin-top: 18px;
    padding-top: 0;
  }

  .about__contact .contact-map {
    margin-top: 16px;
    gap: 8px;
  }

  .about__contact .contact-map__visual img {
    aspect-ratio: 16 / 6.4;
  }

  .about__contact .contact-block__split {
    grid-template-columns: minmax(0, 0.74fr) minmax(0, 1.26fr);
    gap: 14px;
  }

  .about__contact .contact-block__qr {
    grid-template-columns: 76px 1fr;
    gap: 10px;
  }

  .about__contact .contact-block__qr img {
    width: 76px;
  }

  .about__contact .contact-block__phones a {
    min-height: 46px;
  }

  .about__contact .contact-block__phones span {
    font-size: 14px;
  }

  .about__grid > .timeline {
    grid-area: timeline;
    min-width: 0;
    align-self: start;
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--line-light);
    padding-top: 20px;
  }

  .about__grid > .timeline .timeline__stage {
    min-height: 0;
    aspect-ratio: 16 / 10;
  }

  .about__grid > .timeline .timeline__rail {
    margin-top: 22px;
  }
}

@media (max-width: 960px) {
  .about__grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    grid-template-areas:
      "intro"
      "contact"
      "timeline";
    row-gap: 58px;
    column-gap: 0;
  }

  .about__intro {
    grid-area: intro;
    display: block;
    max-width: 650px;
  }

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

  .about__contact {
    grid-area: contact;
    display: block;
  }

  .about__contact .contact-block {
    height: auto;
    margin-top: 0;
  }

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

  .about__grid > .timeline {
    grid-area: timeline;
    height: auto;
    border-top: 1px solid var(--line-light);
    padding-top: 20px;
  }

  .about__grid > .timeline .timeline__stage {
    min-height: 520px;
    aspect-ratio: auto;
  }

  .about__grid > .timeline .timeline__rail {
    margin-top: 19px;
  }
}

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

/* ===== 历程年份条位于图片上方 2026-08-25 ===== */
.about__grid > .timeline .timeline__rail {
  margin-top: 22px;
  margin-bottom: 26px;
}

@media (max-width: 960px) {
  .about__grid > .timeline .timeline__rail {
    margin-top: 19px;
    margin-bottom: 22px;
  }
}

/* ===== 历程当前年份强调 2026-08-25 ===== */
.about__grid > .timeline .timeline__info .timeline__year {
  font-size: clamp(36px, 3.5vw, 52px);
  line-height: 0.95;
}

/* ===== 历程产品图使用白色背景 2026-08-25 ===== */
.timeline__stage:has(.timeline__image--secondary:not([hidden])[data-fit="contain"]) {
  background: #fff;
}

.timeline__stage:has(.timeline__image--secondary:not([hidden])[data-fit="contain"])::after {
  background: transparent;
}

.timeline__stage:has(.timeline__image--secondary:not([hidden])[data-fit="contain"]) .timeline__image--secondary {
  background: #fff;
}

/* ===== 历程年份与产品照片优化 2026-08-30 ===== */
.about__grid > .timeline .year-button {
  font-size: clamp(12px, 0.9vw, 14px);
  font-weight: 560;
  letter-spacing: 0.01em;
}

.timeline__stage:has(.timeline__image:not([hidden])[data-fit="contain"]) {
  background: #fff;
}

.timeline__stage:has(.timeline__image:not([hidden])[data-fit="contain"])::after {
  background: transparent;
}

.timeline__image:not([hidden])[data-fit="contain"],
.timeline__image--secondary:not([hidden])[data-fit="contain"],
.timeline__stage:hover .timeline__image:not([hidden])[data-fit="contain"],
.timeline__stage:hover .timeline__image--secondary:not([hidden])[data-fit="contain"] {
  background: #fff;
  filter: none;
}

/* ===== 工序定制桌面端单屏工作台 2026-08-31 ===== */
@media (min-width: 1024px) and (min-height: 650px) {
  .customization-document {
    height: 100svh;
    background: var(--black-soft);
  }

  .customization-document .customization-page,
  .customization-document .requirement-section,
  .customization-document .requirement-section__inner {
    height: calc(100svh - var(--header-height) - 44px);
    min-height: 0;
  }

  .customization-document .requirement-section__inner {
    padding: clamp(16px, 2.25vh, 22px) 0;
    grid-template-columns: minmax(220px, 0.44fr) minmax(0, 1.56fr);
    gap: clamp(28px, 3vw, 48px);
    align-content: center;
    align-items: start;
  }

  .customization-document .requirement-intro {
    position: static;
  }

  .customization-document .requirement-intro h2 {
    font-size: clamp(40px, 3.3vw, 50px);
    line-height: 1.02;
  }

  .customization-document .requirement-intro > p:not(.section-label) {
    margin-top: 16px;
    font-size: 13px;
    line-height: 1.68;
  }

  .customization-document .process-summary {
    margin-top: 18px;
    padding-top: 14px;
  }

  .customization-document .process-summary__heading h3 {
    font-size: 18px;
  }

  .customization-document .process-summary__heading > p {
    margin-top: 6px;
    font-size: 11px;
    line-height: 1.5;
  }

  .customization-document .process-summary ol {
    margin-top: 10px;
  }

  .customization-document .process-summary li {
    min-height: 33px;
    padding: 6px 0;
    grid-template-columns: 26px 1fr;
    gap: 8px;
    align-items: center;
  }

  .customization-document .process-summary li > span {
    padding-top: 0;
  }

  .customization-document .process-summary li strong {
    font-size: 12px;
  }

  .customization-document .requirement-form {
    min-width: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 18px;
    align-items: end;
  }

  .customization-document .form-header,
  .customization-document .form-grid {
    grid-column: 1 / -1;
  }

  .customization-document .form-header {
    min-height: 34px;
    margin-bottom: 9px;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: end;
  }

  .customization-document .form-header > div {
    min-width: 0;
    display: flex;
    align-items: baseline;
    gap: 13px;
  }

  .customization-document .form-header .section-label {
    flex: 0 0 auto;
    margin: 0;
    font-size: 9px;
  }

  .customization-document .form-header h2 {
    font-size: clamp(24px, 2vw, 30px);
    line-height: 1;
  }

  .customization-document .form-header > p {
    max-width: 24em;
    font-size: 10px;
    line-height: 1.45;
    text-align: right;
  }

  .customization-document .form-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: 38px 132px 38px 128px 56px;
    grid-template-areas:
      "context context context context"
      "industry industry process status"
      "problem-title problem-title goal-title goal-title"
      "problem capacity goal notes"
      "contact contact contact contact";
  }

  .customization-document .form-grid__section--context {
    grid-area: context;
  }

  .customization-document .form-field--industry {
    grid-area: industry;
  }

  .customization-document .form-field--process {
    grid-area: process;
  }

  .customization-document .form-field--status {
    grid-area: status;
  }

  .customization-document .form-grid__section--problem {
    grid-area: problem-title;
  }

  .customization-document .form-field--problem {
    grid-area: problem;
  }

  .customization-document .form-field--capacity {
    grid-area: capacity;
  }

  .customization-document .form-grid__section--goal {
    grid-area: goal-title;
  }

  .customization-document .form-field--goal {
    grid-area: goal;
  }

  .customization-document .form-field--notes {
    grid-area: notes;
  }

  .customization-document .form-field--contact {
    grid-area: contact;
  }

  .customization-document .form-grid > label,
  .customization-document .form-grid > fieldset,
  .customization-document .form-grid__section {
    min-height: 0;
    padding: 8px 10px;
  }

  .customization-document .form-grid__section {
    gap: 9px;
    align-items: center;
  }

  .customization-document .form-grid__section-index {
    padding-top: 0;
    font-size: 8px;
  }

  .customization-document .form-grid__section h3 {
    font-size: 14px;
    line-height: 1.15;
  }

  .customization-document .form-grid__section > div {
    min-width: 0;
    display: flex;
    align-items: baseline;
    gap: 12px;
  }

  .customization-document .form-grid__section p {
    display: block;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    color: rgba(244, 241, 232, 0.58);
    font-size: 8.5px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .customization-document .field-help {
    display: block;
    margin: 3px 0 0;
    overflow: hidden;
    font-size: 8.5px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .customization-document .form-grid > label {
    gap: 4px;
  }

  .customization-document .form-grid > label > span,
  .customization-document .form-grid > fieldset > legend {
    font-size: 11px;
    line-height: 1.28;
  }

  .customization-document .form-grid > label > span small,
  .customization-document .form-grid > fieldset > legend small {
    margin-left: 3px;
    font-size: 9px;
  }

  .customization-document .choice-list {
    margin-top: 5px;
    gap: 5px;
  }

  .customization-document .choice {
    min-height: 31px;
    padding: 4px 8px;
  }

  .customization-document .choice span {
    font-size: 11px;
    line-height: 1.25;
  }

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

  .customization-document .choice-list--status .choice {
    width: 100%;
    min-height: 34px;
  }

  .customization-document .form-grid input,
  .customization-document .form-grid textarea {
    padding: 3px 0 5px;
    font-size: 12px;
    line-height: 1.4;
    resize: none;
  }

  .customization-document .form-grid textarea,
  .customization-document .form-field--notes textarea,
  .customization-document .form-data-block > textarea {
    height: 76px;
    margin-top: 0;
  }

  .customization-document .form-field--contact {
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: center;
    gap: 14px;
  }

  .customization-document .form-field--contact input {
    height: 32px;
  }

  .customization-document .field-error {
    position: absolute;
    right: 8px;
    bottom: 2px;
    margin: 0;
    font-size: 8px;
  }

  .customization-document .form-grid > fieldset {
    position: relative;
  }

  .customization-document .form-note {
    grid-column: 1;
    margin: 9px 0 0;
    font-size: 9px;
    line-height: 1.4;
  }

  .customization-document .requirement-form > .form-actions {
    grid-column: 2;
    margin-top: 9px;
    flex-wrap: nowrap;
    gap: 13px;
  }

  .customization-document .requirement-form > .form-actions .button {
    min-height: 38px;
    padding-inline: 16px;
    gap: 24px;
    font-size: 11px;
  }

  .customization-document .requirement-form > .form-actions .text-button {
    min-height: 38px;
    font-size: 10px;
  }

  .customization-document .requirement-output {
    grid-column: 2;
    max-height: 100%;
    overflow: auto;
  }

  .customization-document .subpage-footer {
    min-height: 44px;
  }
}