/*
 * 使用方法：
 * 1. 本样式与 about.html、header.css 配套使用。
 * 2. 1920px 宽度按 PSD 的 1920×7441 画布还原；980px 以下切换为内容流式布局。
 */
:root {
  --about-blue: #008cff;
  --about-cyan: #27c8ff;
  --about-deep-blue: #003873;
  --about-ink: #f4f8ff;
  --about-muted: rgba(232, 241, 255, 0.76);
  --about-black: #000;
  --about-container: 1404px;
  --header-height: 80px;
  --page-x: clamp(2rem, 8.35vw, 10rem);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: 94px;
  background: #000;
}

body {
  min-height: 100%;
  margin: 0;
  overflow-x: hidden;
  color: var(--about-ink);
  background: #000;
  font-family: "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", "Source Han Sans SC", Arial, "PingFang SC", sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

.about-page {
  overflow: hidden;
  background: #000;
}

.about-container {
  position: relative;
  width: min(calc(100% - 4rem), var(--about-container));
  height: 100%;
  margin: 0 auto;
}

@media (min-width: 1501px) {
  .about-container {
    margin-right: 0;
    margin-left: calc((100vw - var(--about-container)) / 2);
  }
}

.about-section {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: #000;
}

.section-title,
.section-heading h2 {
  color: #fff;
  font-size: 48px;
  line-height: 1.12;
  font-weight: 700;
  text-align: center;
  text-wrap: balance;
}

/* 默认保持内容可见；仅在脚本确认加载后启用入场状态。 */
[data-reveal] {
  opacity: 1;
  transform: none;
}

.about-reveal-ready [data-reveal] {
  opacity: 1;
  filter: none;
  transform: none;
  will-change: opacity, transform, filter;
}

.about-reveal-ready [data-reveal="up"].is-visible {
  animation: reveal-up 780ms var(--ease-out) var(--reveal-delay, 0ms) both;
}

.about-reveal-ready [data-reveal="left"].is-visible {
  animation: reveal-left 780ms var(--ease-out) var(--reveal-delay, 0ms) both;
}

.about-reveal-ready [data-reveal="right"].is-visible {
  animation: reveal-right 780ms var(--ease-out) var(--reveal-delay, 0ms) both;
}

.about-reveal-ready [data-reveal="zoom"].is-visible {
  animation: reveal-zoom 780ms var(--ease-out) var(--reveal-delay, 0ms) both;
}

@keyframes reveal-up {
  from {
    opacity: 0;
    filter: blur(6px);
    transform: translate3d(0, 38px, 0);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }
}

@keyframes reveal-left {
  from {
    opacity: 0;
    filter: blur(6px);
    transform: translate3d(46px, 0, 0);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }
}

@keyframes reveal-right {
  from {
    opacity: 0;
    filter: blur(6px);
    transform: translate3d(-46px, 0, 0);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }
}

@keyframes reveal-zoom {
  from {
    opacity: 0;
    filter: blur(6px);
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: none;
  }
}

/* 首屏 */
.about-hero {
  height: 799px;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("../image/sunlight-home/images/about/hero-factory.jpg") center top / 100% auto no-repeat;
}

.about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, transparent 82%, rgba(0, 0, 0, 0.14) 100%);
  pointer-events: none;
}

.about-reveal-ready .hero-backdrop {
  clip-path: inset(0);
}

.about-reveal-ready .about-hero.is-section-visible .hero-backdrop {
  animation: reveal-hero 1200ms var(--ease-out) both;
}

@keyframes reveal-hero {
  from {
    clip-path: inset(0 100% 0 0);
  }

  to {
    clip-path: inset(0);
  }
}

.hero-copy {
  display: flex;
  padding-bottom: 74px;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
}

.hero-copy img {
  margin-bottom: 26px;
  width: 130px;
}

.hero-brand {
  position: relative;
  margin: 0 0 20px 1px;
  font-size: 18px;
  line-height: 1;
  font-style: italic;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-copy h1 {
  margin-left: 2px;
  font-size: 48px;
  line-height: 1;
  font-weight: 400;
  letter-spacing: 0;
}

.hero-copy h1 span {
  position: relative;
  top: 2px;
  margin-left: 7px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0;
}

/* 企业介绍 */
.company-section {
  height: 664px;
}

.company-section .about-container {
  padding-top: 126px;
}

.section-heading p {
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 16px;
  line-height: 1.7;
  text-align: center;
}

.company-metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  margin-top: 63px;
}

.metric-card {
  display: flex;
  height: 286px;
  padding: 20px 10px 30px;
  border: 1px solid #0879d9;
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  color: #fff;
  background: linear-gradient(155deg, #003161 0%, #00427f 58%, #00366d 100%);
  box-shadow: inset 0 0 25px rgba(0, 137, 255, 0.1);
}

.metric-card img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.metric-card h3 {
  margin-top: 20px;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 700;
  /*white-space: nowrap;*/
  text-align: center;
}

.metric-card p {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 24px;
  text-align: center;
}

/* 发展历程 */
.history-section {
  height: 1020px;
}

.history-section::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 0;
  height: 314px;
  background: url("../image/sunlight-home/images/about/history-culture-transition.jpg") center / 100% 100% no-repeat;
  pointer-events: none;
}

.history-section>.section-title {
  position: relative;
  z-index: 3;
  padding-top: 20px;
}

.history-stage,
.timeline-list {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.history-stage {
  z-index: 1;
}

@media (min-width: 981px) {
  .history-curve,
  .timeline-list {
    transform: translateY(80px);
  }
}

.history-curve {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 605px;
  margin-top: 0;
  overflow: visible;
}

.history-line {
  fill: none;
  stroke: #008dff;
  stroke-width: 5;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 8px rgba(0, 132, 255, 0.48));
}

.history-arrow-head {
  fill: #3f86ff;
  stroke: none;
  filter: drop-shadow(0 0 8px rgba(0, 132, 255, 0.48));
}

.about-reveal-ready .history-line {
  stroke-dasharray: none;
  stroke-dashoffset: 0;
}

.timeline-item {
  --x: 50%;
  --y: 50%;
  position: absolute;
  z-index: 2;
  top: var(--y);
  left: var(--x);
  width: 0;
  height: 0;
  color: #fff;
  transition: opacity 320ms ease;
}

.timeline-item-1 {
  --x: 18.9583%;
  --y: 559px;
}

.timeline-item-2 {
  --x: 27.0052%;
  --y: 544px;
}

.timeline-item-3 {
  --x: 35%;
  --y: 526px;
}

.timeline-item-4 {
  --x: 43.0208%;
  --y: 503px;
}

.timeline-item-5 {
  --x: 50.9896%;
  --y: 474px;
}

.timeline-item-6 {
  --x: 59.0365%;
  --y: 439px;
}

.timeline-item-7 {
  --x: 67.0313%;
  --y: 395px;
}

.timeline-item-8 {
  --x: 75.0521%;
  --y: 337px;
}

/* 超宽屏保持箭头与右侧的视觉留白，不让留白随视口同比放大。 */
@media (min-width: 1921px) {

  .history-curve,
  .timeline-list {
    right: auto;
    width: calc(100% + 17.2877vw - 331.92px);
  }
}

.timeline-node {
  position: absolute;
  z-index: 2;
  top: -10px;
  left: -10px;
  width: 20px;
  height: 20px;
  border: 4px solid rgba(0, 126, 255, 0.38);
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 12px rgba(0, 145, 255, 0.85);
  transition: border-color 320ms ease, box-shadow 320ms ease, transform 320ms var(--ease-out);
}

.timeline-node>span {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: -1;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  opacity: 0;
  background: rgba(25, 145, 255, 0.42);
  transform: translate(-50%, -50%) scale(1);
  pointer-events: none;
}

.timeline-stem {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 1px;
  height: 136px;
  background: linear-gradient(180deg, rgba(0, 143, 255, 0), rgba(0, 143, 255, 0.8));
}

.timeline-item:nth-child(even) .timeline-stem {
  top: 0;
  bottom: auto;
  background: linear-gradient(180deg, rgba(0, 143, 255, 0.8), rgba(0, 143, 255, 0));
}

.timeline-item>div {
  position: absolute;
  right: -160px;
  bottom: 152px;
  width: 240px;
  transform-origin: left bottom;
  transition: opacity 320ms ease, transform 320ms var(--ease-out), color 320ms ease;
}

.timeline-item:nth-child(even)>div {
  top: 152px;
  right: -174px;
  bottom: auto;
  transform-origin: left top;
}

.timeline-item.is-history-active {
  z-index: 4;
}

.timeline-item.is-history-active>div {
  color: #fff;
  transform: scale(1.18);
}

.timeline-item.is-history-muted {
  opacity: 0.45;
}

.timeline-item.is-history-active strong,
.timeline-item.is-history-active .timeline-copy {
  color: #fff;
}

.timeline-item.is-history-active .timeline-node {
  border-color: rgba(72, 174, 255, 0.78);
  box-shadow: 0 0 16px rgba(0, 145, 255, 1);
  transform: scale(1.18);
}

.timeline-item.is-history-active .timeline-node>span {
  animation: timeline-node-pulse 6s ease infinite;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(1) {
  animation-delay: -1s;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(2) {
  animation-delay: -2s;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(3) {
  animation-delay: -3s;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(4) {
  animation-delay: -4s;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(5) {
  animation-delay: -5s;
}

.timeline-item.is-history-active .timeline-node>span:nth-child(6) {
  animation-delay: -6s;
}

@keyframes timeline-node-pulse {
  0% {
    opacity: 0.62;
    transform: translate(-50%, -50%) scale(1);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(8);
  }
}

.timeline-item strong {
  font-size: 22px;
  line-height: 1;
  transition: color 320ms ease;
}

.timeline-copy {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  line-height: 16px;
  overflow-wrap: anywhere;
  transition: color 320ms ease;
}

.timeline-copy p {
  margin: 0;
  color: inherit;
  font: inherit;
}

.timeline-line {
  position: relative;
  display: block;
  padding-left: 12px;
}

.timeline-line::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #008dff;
  box-shadow: 0 0 6px rgba(0, 141, 255, 0.72);
  transform: translateY(-50%);
}

.timeline-item-1>div {
  bottom: 150px;
}

.timeline-item-2:nth-child(even)>div {
  top: 153px;
}

.timeline-item-3>div {
  bottom: 145px;
}

.timeline-item-4:nth-child(even)>div {
  top: 150px;
}

.timeline-item-5>div {
  bottom: 125px;
}

.timeline-item-6:nth-child(even)>div {
  top: 150px;
}

.timeline-item-7>div {
  bottom: 130px;
}

.timeline-item-8:nth-child(even)>div {
  top: 153px;
}

@media (min-width: 981px) and (max-width: 1919px) {
  /* 文案始终锚定自身时间点；缩窄宽度，以增加换行高度换取横向间距。 */
  .timeline-item>div,
  .timeline-item:nth-child(even)>div {
    right: auto;
    left: max(-4.67vw, -73px);
    width: min(14vw, 220px);
  }

  .timeline-item.is-history-active>div {
    transform: scale(1.08);
  }
}

@media (min-width: 981px) and (max-width: 1100px) {
  .history-section {
    height: 1070px;
  }

  .history-curve,
  .timeline-list {
    transform: translateY(130px);
  }
}

/* 企业文化 */
.culture-section {
  height: 550px;
}

.culture-flow-bg,
.laboratory-flow-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("../image/sunlight-home/images/about/culture-flow-exact.jpg") center / 100% 100% no-repeat;
}

.culture-section .about-container {
  padding-top: 70px;
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 333px);
  justify-content: space-between;
  margin-top: 79px;
}

.culture-grid article {
  position: relative;
  height: 276px;
  padding: 30px 12px 30px;
  border: 0;
  background:
    url("../image/sunlight-home/images/about/culture-card-border.png") center / 100% 100% no-repeat;
  text-align: center;
}

.culture-grid h3 {
  font-size: 28px;
  line-height: 1;
}

.culture-grid p {
  min-height: 60px;
  margin-top: 25px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
  line-height: 25px;
}

.culture-grid span {
  position: absolute;
  bottom: -15px;
  left: 50%;
  padding: 0;
  color: #0479e8;
  font-size: 22px;
  line-height: 30px;
  background: transparent;
  transform: translateX(-50%);
}

/* 权威认证 */
.certification-section {
  height: 643px;
  background: #000 url("../image/sunlight-home/images/about/certification-flow-exact.jpg") center / 100% 100% no-repeat;
}

.certification-section .about-container {
  padding-top: 120px;
}

.certification-layout {
  display: flex;
  height: 381px;
  margin-top: 64px;
  align-items: center;
}

.certification-copy {
  position: relative;
  margin-left: 39px;
  padding-left: 22px;
}

.certification-copy::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  background: #008cff;
}

.certification-copy h3 {
  /*font-family: Georgia, "Times New Roman", serif;*/
  font-size: 54px;
  line-height: 1;
}

.certification-en {
  margin-top: 14px;
  /*font-family: Georgia, "Times New Roman", serif;*/
  font-size: 28px !important;
  line-height: 1.08 !important;
}

.certification-copy p:last-child {
  margin-top: 22px;
  color: #fff;
  font-size: 33px;
  line-height: 1.5;
}

.certificates {
  display: flex;
  gap: 27px;
  margin-left: auto;
}

.certificates figure {
  width: 277px;
  height: 381px;
  margin: 0;
  padding: 20px;
  border: 1px solid #0589ff;
  border-radius: 8px;
  background: linear-gradient(145deg, #003a77, #00569e);
}

.certificates img {
  width: 235px;
  height: 329px;
  object-fit: cover;
}

/* 专利成果 */
.patent-section {
  height: 1072px;
}

.patent-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: #03106b url("../image/sunlight-home/images/about/patent-wall-exact.jpg") center / cover no-repeat;
  transform: none;
}

.patent-section::after {
  content: none;
}

.about-reveal-ready .patent-backdrop {
  transform: none;
}

.about-reveal-ready .patent-section.is-section-visible .patent-backdrop {
  animation: none;
}

.patent-copy {
  position: absolute;
  inset: 0;
  text-align: center;
}

.patent-copy h2 {
  margin-top: 150px;
  color: #0096ff;
  font-size: 44px;
  line-height: 1.2;
  font-weight: 500;
}

.patent-count {
  margin-top: 260px;
}

.patent-count>span {
  display: block;
  font-size: 36px;
  font-weight: 700;
}

.patent-count strong {
  display: block;
  margin-top: 14px;
  font-size: 40px;
  line-height: 1;
}

.patent-count b {
  font-size: 70px;
}

/* 生产基地 */
.production-section {
  height: 642px;
}

.production-section::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  height: 163px;
  background: url("../image/sunlight-home/images/about/production-lab-transition.jpg") center / 100% 100% no-repeat;
  pointer-events: none;
}

.production-section .section-title {
  transform: translateY(-12px);
}

.production-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 52px;
  margin-top: 54px;
}

.production-grid article {
  position: relative;
  height: 460px;
  padding: 32px 31px 0;
  border-radius: 10px;
  background: #0e4f87;
  box-shadow: inset 0 0 0 1px #0989ef;
  transition: box-shadow 260ms ease;
}

.production-grid article::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: 0;
  border: 1px solid #168eff;
  border-radius: 10px;
  opacity: 0;
  background: linear-gradient(180deg, #124dff 0%, #087cff 48%, #0579ee 100%);
  box-shadow: 0 0 36px rgba(0, 114, 255, 0.72), inset 0 0 34px rgba(55, 190, 255, 0.2);
  transition: opacity 260ms ease;
  pointer-events: none;
}

.production-grid article:hover,
.production-grid article:focus-within {
  box-shadow: none;
}

.production-grid article:hover::before,
.production-grid article:focus-within::before {
  opacity: 1;
}

.production-grid article>* {
  position: relative;
  z-index: 1;
}

.production-grid img {
  width: 100%;
  height: 219px;
  object-fit: cover;
}

.production-grid article>div {
  padding: 20px 4px 0;
}

.production-grid h3 {
  font-size: 20px;
  line-height: 1.35;
}

.production-grid p {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  line-height: 24px;
}

/* 研发实验室 */
.laboratory-section {
  height: 910px;
}

.laboratory-flow-bg {
  background-image: url("../image/sunlight-home/images/about/lab-flow-exact.jpg");
  background-position: center;
}

.laboratory-section .about-container {
  padding-top: 133px;
}

.laboratory-layout {
  display: grid;
  grid-template-columns: 666px 1fr;
  gap: 140px;
  margin-top: 118px;
  align-items: center;
}

.laboratory-collage {
  position: relative;
  width: 666px;
  height: 455px;
  padding: 20px;
  border-radius: 10px;
  background: #0e4f87;
  box-shadow: inset 0 0 0 1px #0989ef;
  transition: box-shadow 260ms ease;
  cursor: pointer;
}

.laboratory-collage::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: 0;
  border: 1px solid #168eff;
  border-radius: 10px;
  opacity: 0;
  background: linear-gradient(180deg, #124dff 0%, #087cff 48%, #0579ee 100%);
  box-shadow: 0 0 36px rgba(0, 114, 255, 0.72), inset 0 0 34px rgba(55, 190, 255, 0.2);
  transition: opacity 260ms ease;
  pointer-events: none;
}

.laboratory-collage:hover {
  box-shadow: none;
}

.laboratory-collage:hover::before {
  opacity: 1;
}

.laboratory-collage>img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.laboratory-points {
  position: relative;
  /*display: block;*/
  height: 455px;
  padding-right: 66px;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
}

.laboratory-points article {
  /*position: absolute;
  right: 66px;
  left: 0;*/

}

/*.laboratory-points article:nth-child(1) {
  top: 51px;
}

.laboratory-points article:nth-child(2) {
  top: 207px;
}

.laboratory-points article:nth-child(3) {
  top: 353px;
}*/

.laboratory-points article::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  width: 3px;
  height: 30px;
  background: #3787ff;
}

.laboratory-points h3 {
  padding-left: 15px;
  font-size: 30px;
  line-height: 1.25;
}

.laboratory-points p {
  margin-top: 6px;
  color: white;
  font-size: 16px;
  line-height: 24px;
}

/* 全球布局 */
.global-section {
  height: 791px;
}

.global-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: #000 url("../image/sunlight-home/images/about/global-network-exact.jpg") center / 100% 100% no-repeat;
}

.global-section::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: none;
}

.about-reveal-ready .global-backdrop {
  opacity: 1;
  transform: scale(1);
}

.about-reveal-ready .global-section.is-section-visible .global-backdrop {
  animation: global-arrive 1600ms var(--ease-out) both;
}

@keyframes global-arrive {
  from {
    opacity: 0;
    transform: scale(1.06);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.global-copy {
  padding-top: 80px;
  text-align: center;
}

.global-copy>p {
  margin-top: 27px;
  color: rgba(255, 255, 255, 0.79);
  font-size: 16px;
  line-height: 1.75;
}

@media (max-width: 1500px) {
  .culture-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(8px, 1.25vw, 20px);
  }

  .culture-grid article {
    min-width: 0;
    padding-right: clamp(12px, 1.5vw, 24px);
    padding-left: clamp(12px, 1.5vw, 24px);
  }
}

@media (max-width: 1280px) {

  .metric-card h3,
  .culture-grid h3 {
    font-size: 24px;
  }

  .metric-card p{
    font-size: 12px;
  }

  .culture-grid p {
    font-size: 16px;
    line-height: 20px;
  }

  .certification-copy {
    margin-left: 0;
  }

  .laboratory-layout {
    grid-template-columns: minmax(480px, 1.2fr) 1fr;
    gap: 6vw;
  }

  .laboratory-collage {
    width: 100%;
    height: auto;
  }

  .laboratory-points {
    padding-right: 0;
  }

  .laboratory-points article {
    right: 0;
  }

  .production-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3vw;
  }
}

@media (max-width: 980px) {
  :root {
    --header-height: 67px;
  }

  .about-container {
    width: min(calc(100% - 2rem), 710px);
  }

  .about-section {
    height: auto;
    min-height: 0;
  }

  .about-hero {
    height: min(80vw, 600px);
  }

  .hero-backdrop {
    background-position: 42% top;
    background-size: cover;
  }

  .hero-copy {
    padding-bottom: min(6.4vw, 48px);
  }

  .hero-copy img {
    width: clamp(73px, 19.33vw, 145px);
    margin-bottom: min(2.4vw, 18px);
  }

  .hero-copy h1 {
    font-size: clamp(25px, 6.4vw, 48px);
  }

  .hero-copy h1 span {
    top: 0;
    margin-left: 5px;
    font-size: clamp(12px, 2.93vw, 22px);
  }

  .section-title,
  .section-heading h2 {
    font-size: clamp(22px, 4.8vw, 36px);
  }

  .company-section .about-container {
    padding-top: min(8vw, 60px);
    padding-bottom: min(8vw, 60px);
  }

  .section-heading p br,
  .global-copy>p br {
    display: initial;
  }

  .section-heading p {
    margin-top: min(2.93vw, 22px);
    padding: 0 7vw;
    font-size: clamp(11px, 1.87vw, 14px);
    line-height: 1.65;
  }

  .company-metrics {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: min(2.67vw, 20px);
    margin-top: min(4.8vw, 36px);
  }

  .metric-card:nth-child(1) {
    grid-column: 2 / span 2;
  }

  .metric-card:nth-child(2) {
    grid-column: 4 / span 2;
  }

  .metric-card:nth-child(3) {
    grid-column: 1 / span 2;
  }

  .metric-card:nth-child(4) {
    grid-column: 3 / span 2;
  }

  .metric-card:nth-child(5) {
    grid-column: 5 / span 2;
  }

  .metric-card {
    height: auto;
    min-height: clamp(128px, 32vw, 240px);
    padding: min(6vw, 45px) 8px 10px;
    border-radius: min(1.6vw, 12px);
  }

  .metric-card img {
    width: clamp(22px, 5.87vw, 44px);
    height: clamp(22px, 5.87vw, 44px);
  }

  .metric-card h3 {
    margin-top: min(4vw, 30px);
    font-size: clamp(9px, 2.93vw, 22px);
  }

  .metric-card p {
    margin-top: min(2vw, 15px);
    font-size: clamp(9px, 1.8vw, 14px);
    line-height: 1.5;
  }

  .history-section {
    height: min(164vw, 1230px);
    /*padding: min(9.33vw, 70px) 0 0;*/
  }

  .history-section>.section-title {
    padding-top: 0;
  }

  .history-stage,
  .timeline-list {
    position: absolute;
    inset: 0;
  }

  .history-stage {
    top: clamp(170px, 24vw, 220px);
    width: 100%;
    height: min(80vw, 600px);
    margin: 0;
  }

  .history-curve {
    display: block;
    top: 36.8234%;
    width: 115%;
    height: 32.0444%;
  }

  .history-arrow-head {
    opacity: 1;
    transform: scale(var(--history-arrow-scale-x, 1.2), var(--history-arrow-scale-y, 2));
    transform-box: fill-box;
    transform-origin: center;
  }

  .timeline-list {
    display: block;
  }

  .timeline-item,
  .timeline-item-1,
  .timeline-item-2,
  .timeline-item-3,
  .timeline-item-4,
  .timeline-item-5,
  .timeline-item-6,
  .timeline-item-7,
  .timeline-item-8 {
    position: absolute;
    display: block;
    width: 0;
    min-height: 0;
    height: 0;
    padding: 0;
  }

  .timeline-item-1 {
    top: 67.406%;
    left: 6.5%;
  }

  .timeline-item-2 {
    top: 66.8068%;
    left: 18%;
  }

  .timeline-item-3 {
    top: 65.8973%;
    left: 29.5%;
  }

  .timeline-item-4 {
    top: 64.6593%;
    left: 41%;
  }

  .timeline-item-5 {
    top: 63.0364%;
    left: 52.5%;
  }

  .timeline-item-6 {
    top: 60.9274%;
    left: 64%;
  }

  .timeline-item-7 {
    top: 58.1522%;
    left: 75.5%;
  }

  .timeline-item-8 {
    top: 54.3463%;
    left: 87%;
  }

  .timeline-node {
    top: -6px;
    left: -6px;
    width: 12px;
    height: 12px;
    border-width: 2px;
  }

  .timeline-stem {
    display: block;
    height: min(18.67vw, 140px);
  }

  .timeline-item>div {
    position: absolute;
    right: auto;
    bottom: min(20vw, 150px);
    left: max(-2vw, -15px);
    width: min(20vw, 150px);
  }

  .timeline-item:nth-child(even)>div {
    top: min(20vw, 150px);
    right: auto;
    bottom: auto;
    left: max(-2vw, -15px);
  }

  .timeline-item-1>div,
  .timeline-item-3>div,
  .timeline-item-5>div,
  .timeline-item-7>div {
    bottom: min(20vw, 150px);
  }

  .timeline-item-2:nth-child(even)>div,
  .timeline-item-4:nth-child(even)>div,
  .timeline-item-6:nth-child(even)>div,
  .timeline-item-8:nth-child(even)>div {
    top: min(20vw, 150px);
  }

  .timeline-item-8:nth-child(even)>div {
    right: auto;
    left: max(-2vw, -15px);
    width: min(14vw, 130px);
    transform-origin: right top;
  }

  .timeline-item strong {
    font-size: clamp(14px, 3.2vw, 24px);
  }

  .timeline-copy {
    margin-top: min(1.33vw, 10px);
    font-size: clamp(9px, 1.6vw, 12px);
    line-height: 1.3;
  }

  .timeline-item.is-history-active>div {
    transform: scale(1.12);
  }

  .culture-section {
    height: auto;
    min-height: min(113.33vw, 850px);
  }

  .culture-section::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: -1;
    height: min(24vw, 180px);
    background: linear-gradient(180deg, rgba(0, 0, 0, 0), #000 94%);
    pointer-events: none;
  }

  .culture-section .about-container {
    padding-top: min(8vw, 60px);
    padding-bottom: min(8vw, 60px);
  }

  .culture-grid {
    grid-template-columns: repeat(2, 1fr);
    column-gap: min(2.67vw, 20px);
    row-gap: min(7.33vw, 55px);
    margin-top: min(7.33vw, 55px);
  }

  .culture-grid article {
    height: auto;
    min-height: clamp(160px, 37.33vw, 280px);
    padding: 30px 12px 15px;
  }

  .culture-grid h3 {
    font-size: 22px;
  }

  .culture-grid p,
  .culture-grid article:last-child p {
    min-height: 0;
    margin-top: min(3.2vw, 24px);
    font-size: 16px;
    line-height: 1.65;
  }

  .culture-grid span {
    bottom: max(-2vw, -15px);
    font-size: clamp(12px, 2.67vw, 20px);
  }

  .certification-section {
    height: auto;
    min-height: min(108vw, 810px);
    background: #000;
  }

  .certification-section .about-container {
    padding-top: min(8vw, 60px);
    padding-bottom: min(8vw, 60px);
  }

  .certification-layout {
    height: auto;
    margin-top: min(7.33vw, 55px);
    flex-direction: column;
    align-items: stretch;
  }

  .certification-copy {
    /*width: min(64vw, 480px);*/
    margin: 0 auto;
    padding-left: min(2.67vw, 20px);
  }

  .certification-copy::before {
    width: 3px;
  }

  .certification-copy h3 {
    font-size: clamp(30px, 6.93vw, 54px);
  }

  .certification-en {
    margin-top: min(1.87vw, 14px);
    font-size: clamp(18px, 3.47vw, 28px) !important;
  }

  .certification-copy p:last-child {
    margin-top: min(2.93vw, 22px);
    font-size: clamp(13px, 2.27vw, 33px);
  }

  .certificates {
    gap: min(3.6vw, 27px);
    margin: min(7.33vw, 55px) auto 0;
  }

  .certificates figure {
    width: min(36.93vw, 277px);
    height: auto;
    padding: min(2.67vw, 20px);
  }

  .certificates img {
    width: 100%;
    height: auto;
  }

  .patent-section {
    height: min(94.67vw, 710px);
  }

  .patent-copy h2 {
    margin-top: min(12vw, 90px);
    padding: 0 1rem;
    font-size: clamp(20px, 4.8vw, 36px);
  }

  .patent-count {
    margin-top: min(22.67vw, 170px);
  }

  .patent-count>span {
    font-size: clamp(20px, 4.53vw, 34px);
  }

  .patent-count strong {
    margin-top: min(1.87vw, 14px);
    font-size: clamp(22px, 5.07vw, 38px);
  }

  .patent-count b {
    font-size: clamp(42px, 9.33vw, 70px);
  }

  .production-section {
    height: auto;
    min-height: min(121.33vw, 910px);
    padding: min(8vw, 60px) 0;
  }

  .production-section .section-title {
    transform: none;
  }

  .production-grid {
    grid-template-columns: 1fr;
    width: 100%;
    gap: min(2.67vw, 20px);
    margin: min(6.67vw, 50px) auto 0;
  }

  .production-grid article {
    display: grid;
    grid-template-columns: 46% 54%;
    height: auto;
    min-height: min(25.33vw, 190px);
    padding: min(1.87vw, 14px);
  }

  .production-grid article::before {
    inset: -1px;
  }

  .production-grid img {
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
  }

  .production-grid article>div {
    min-height: 0;
    padding: min(3.2vw, 24px) min(2.67vw, 20px);
  }

  .production-grid h3 {
    font-size: clamp(14px, 3.2vw, 24px);
  }

  .production-grid p {
    margin-top: min(1.87vw, 14px);
    font-size: clamp(10px, 1.87vw, 14px);
    line-height: 1.55;
  }

  .laboratory-section {
    height: min(153.33vw, 1150px);
  }

  .laboratory-section .about-container {
    padding-top: min(9.33vw, 70px);
  }

  .laboratory-layout {
    grid-template-columns: 1fr;
    gap: min(8vw, 60px);
    margin-top: min(6.67vw, 50px);
  }

  .laboratory-collage {
    width: 100%;
    height: auto;
  }

  .laboratory-points {
    display: grid;
    gap: min(5.33vw, 40px);
    height: auto;
    padding: 0 min(7.33vw, 55px);
  }

  .laboratory-points article,
  .laboratory-points article:nth-child(1),
  .laboratory-points article:nth-child(2),
  .laboratory-points article:nth-child(3) {
    position: relative;
    top: auto;
    right: auto;
    left: auto;
  }

  .laboratory-points article::before {
    top: 0;
    height: calc(clamp(15px, 3.2vw, 24px) * 1.25);
  }

  .laboratory-points h3 {
    font-size: clamp(15px, 3.2vw, 24px);
  }

  .laboratory-points p {
    margin-top: min(1.33vw, 10px);
    font-size: clamp(10px, 1.87vw, 14px);
    line-height: 1.55;
  }

  .global-section {
    height: min(72vw, 540px);
  }

  .global-backdrop {
    background-position: center bottom;
    background-size: auto 66%;
  }

  .global-copy {
    padding-top: min(8vw, 60px);
    text-align: center;
  }

  .global-copy>p {
    margin-top: min(3.2vw, 24px);
    margin-right: auto;
    margin-left: auto;
    padding: 0;
    width: min(88vw, 660px);
    font-size: clamp(10px, 1.87vw, 14px);
    line-height: 1.75;
  }
}

@media (max-width: 640px) {

  .about-container {
    width: calc(100% - 2rem);
  }

  .section-heading p {
    padding: 0;
  }

  /* 手机端改为单列时间轴，完整文案按内容自然增高，不再压缩进曲线坐标。 */
  .history-section {
    height: auto;
    padding: 56px 32px 88px;
  }

  .history-section::after {
    height: 220px;
  }

  .history-stage {
    position: relative;
    top: auto;
    width: auto;
    height: auto;
    margin: 48px 0 0 24px;
  }

  .history-curve {
    display: none;
  }

  .timeline-list {
    position: relative;
    inset: auto;
    display: grid;
    gap: 32px;
  }

  .timeline-item,
  .timeline-item-1,
  .timeline-item-2,
  .timeline-item-3,
  .timeline-item-4,
  .timeline-item-5,
  .timeline-item-6,
  .timeline-item-7,
  .timeline-item-8 {
    position: relative;
    top: auto;
    left: auto;
    width: auto;
    height: auto;
    min-height: 0;
    padding-left: 32px;
  }

  .timeline-node {
    top: 4px;
    left: 0;
  }

  .timeline-stem,
  .timeline-item:nth-child(even) .timeline-stem {
    top: 18px;
    bottom: auto;
    left: 5px;
    display: block;
    width: 1px;
    height: calc(100% + 32px);
    background: linear-gradient(180deg, rgba(0, 143, 255, 0.8), rgba(0, 143, 255, 0.08));
  }

  .timeline-item:last-child .timeline-stem {
    display: none;
  }

  .timeline-item>div,
  .timeline-item:nth-child(even)>div,
  .timeline-item-8:nth-child(even)>div {
    position: static;
    width: auto;
    transform-origin: left top;
  }

  .timeline-item.is-history-active>div {
    transform: none;
  }

  .timeline-item.is-history-active strong {
    font-size: 22px;
  }

  .timeline-item.is-history-active .timeline-copy {
    font-size: 14px;
  }

  .timeline-item strong {
    font-size: 20px;
  }

  .timeline-copy {
    margin-top: 8px;
    font-size: 13px;
    line-height: 1.75;
  }

  /* 窄屏继续保持设计稿的两列/三列关系，仅收紧文字与内边距。 */
  .metric-card {
    padding-right: 4px;
    padding-left: 4px;
  }

  .culture-grid article {
    padding-right: 6px;
    padding-left: 6px;
  }

  .production-grid article>div {
    padding-right: 10px;
    padding-left: 12px;
  }

  .laboratory-points {
    padding-right: 4vw;
    padding-left: 4vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .about-reveal-ready [data-reveal],
  .about-reveal-ready .hero-backdrop,
  .about-reveal-ready .patent-backdrop,
  .about-reveal-ready .global-backdrop,
  .history-line,
  .timeline-item>div,
  .timeline-node {
    opacity: 1 !important;
    filter: none !important;
    clip-path: none !important;
    transform: none !important;
    transition-duration: 1ms !important;
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }

  .timeline-node>span {
    transition-duration: 1ms !important;
    animation: none !important;
  }

  .timeline-item.is-history-active .timeline-node>span:first-child {
    opacity: 0.24 !important;
    transform: translate(-50%, -50%) scale(2.2) !important;
  }
}