*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body {
  margin: 0;
}
h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}
ol,
ul {
  margin: 0;
  padding: 0;
}
ul {
  list-style: none;
}
.development-history {
  --theme-color: #30c6d1;
  --separate-line-width: 2px;
  --separate-dot-size: 16px;
  --event-block-width: 360px;
  --track-path-width: 4px;
  --track-path-height: 60px;
  --track-path-count: 24;
  overflow-x: hidden;
  font-family: 'Source Han Sans SC', 'Source Han Sans SC VF', 'Source Han Sans CN', 'Source Han Sans CN VF', 'Noto Sans CJK SC', 'Noto Sans SC', 'HanHei SC', 'HarmonyOS Sans SC', '方正兰亭黑Pro Global', '方正兰亭黑_GB18030', '方正兰亭黑_GBK', 'ui-sans-serif', 'system-ui', 'sans-serif', emoji;
  font-size: 16px;
  line-height: 1.5;
  color: #282828;
}
.development-history .section-header {
  /* padding-top: 40px;
    padding-bottom: 40px; */
  user-select: none;
}
.development-history .section-header .title {
  font-size: 2.75em;
  font-weight: 500;
  text-align: center;
}
@media (max-width: 1536px) {
  .development-history .section-header .title {
    font-size: 2.5em;
  }
}
@media (max-width: 1024px) {
  .development-history .section-header .title {
    font-size: 2.25em;
  }
}
@media (max-width: 768px) {
  .development-history .section-header .title {
    font-size: 2em;
  }
}
@media (max-width: 480px) {
  .development-history .section-header .title {
    font-size: 1.75em;
  }
}
.development-history .section-header .subtitle {
  margin-top: 12px;
  font-size: 1.125em;
  text-align: center;
}
@media (max-width: 768px) {
  .development-history .section-header .subtitle {
    font-size: 1em;
  }
}
@media (max-width: 480px) {
  .development-history .section-header .subtitle {
    font-size: 0.875em;
  }
}
.development-history .section-body {
  background-color: #f9f9f9;
}
.development-history .section-body.desktop {
  overflow-x: scroll;
  scrollbar-width: none;
  padding: 80px;
}
.development-history .section-body.desktop::-webkit-scrollbar {
  display: none;
}
.development-history .section-body.desktop .events-group::before {
  display: block;
  position: absolute;
  left: calc(var(--separate-line-width) / -2);
  width: var(--separate-line-width);
  height: 100%;
  background-color: var(--theme-color);
  content: '';
}
.development-history .section-body.desktop .events-group::after {
  display: block;
  position: absolute;
  left: calc(var(--separate-dot-size) / -2);
  width: var(--separate-dot-size);
  height: var(--separate-dot-size);
  background-color: var(--theme-color);
  border-radius: 9999px;
  content: '';
}
.development-history .section-body.desktop .events-wrapper-odd .events-group::after {
  bottom: calc(var(--separate-dot-size) / -2);
}
.development-history .section-body.desktop .events-wrapper-even {
  margin-left: var(--event-block-width);
}
.development-history .section-body.desktop .events-wrapper-even .events-group::after {
  top: calc(var(--separate-dot-size) / -2);
}
.development-history .section-body.desktop .track-axis {
  margin-top: 40px;
  margin-bottom: 40px;
}
.development-history .section-body.mobile {
  padding-bottom: 60px;
}
.development-history .section-body.mobile .track-axis {
  width: unset;
}
.development-history .section-body.mobile .track-axis .path-group {
  justify-content: center;
}
.development-history .section-body.mobile .track-axis .car {
  --car-position: calc(50% - var(--track-path-height) * var(--car-aspect-ratio) / 2);
}
.development-history .events-wrapper,
.development-history .track-axis {
  width: fit-content;
}
.development-history .events-wrapper {
  display: flex;
  column-gap: calc(var(--event-block-width) * 0.5);
}
.development-history .events-group {
  flex: none;
  position: relative;
  width: calc(var(--event-block-width) * 1.5);
  padding-left: 32px;
}
.development-history .events-group .events-title {
  font-size: 1.875em;
  font-weight: 500;
  line-height: 1;
  transition: color 1s;
  user-select: none;
  cursor: pointer;
}
.development-history .events-group .text-emphasis {
  margin-right: 0.1em;
  font-family: 'Bebas';
  font-size: 1.75em;
  font-weight: 600;
  font-style: normal;
  letter-spacing: 2px;
}
.development-history .events-group .events {
  display: flex;
  flex-direction: column;
  row-gap: 1em;
  margin-top: 1.25em;
  font-size: 1.125em;
}
.development-history .events-group .events .events-item {
  display: flex;
  column-gap: 1em;
}
.development-history .events-group .events .events-item .date {
  flex: none;
  font-weight: 500;
  user-select: none;
}
.development-history .events-group .events .events-item .text {
  color: #666;
  user-select: none;
}
.development-history .events-group.active .events-title,
.development-history .events-group.swiper-slide-active .events-title {
  color: var(--theme-color);
}
.development-history .track-axis {
  position: relative;
  user-select: none;
}
.development-history .track-axis .path-group,
.development-history .track-axis .path-group-swiper {
  height: var(--track-path-height);
}
.development-history .track-axis .path-group .path-item,
.development-history .track-axis .path-group-swiper .path-item {
  flex: none;
  position: relative;
  width: calc(var(--event-block-width) / 2);
  height: calc(var(--track-path-height) * 0.6);
  background-image: repeating-linear-gradient(to right, transparent 0 calc(var(--event-block-width) / var(--track-path-count) - var(--track-path-width) / 2), #ccc calc(var(--event-block-width) / var(--track-path-count) - var(--track-path-width) / 2) calc(var(--event-block-width) / var(--track-path-count)));
}
.development-history .track-axis .path-group .path-item::before,
.development-history .track-axis .path-group-swiper .path-item::before,
.development-history .track-axis .path-group .path-item::after,
.development-history .track-axis .path-group-swiper .path-item::after {
  display: block;
  position: absolute;
  top: calc(var(--track-path-height) * -0.2);
  width: calc(var(--track-path-width) / 2);
  height: var(--track-path-height);
  background-color: var(--theme-color);
  content: '';
}
.development-history .track-axis .path-group .path-item:not(:first-of-type)::before,
.development-history .track-axis .path-group-swiper .path-item:not(:first-of-type)::before {
  left: 0;
}
.development-history .track-axis .path-group .path-item:not(:last-of-type)::after,
.development-history .track-axis .path-group-swiper .path-item:not(:last-of-type)::after {
  right: 0;
}
.development-history .track-axis .path-group .path-item:first-of-type::before,
.development-history .track-axis .path-group-swiper .path-item:first-of-type::before,
.development-history .track-axis .path-group .path-item:last-of-type::after,
.development-history .track-axis .path-group-swiper .path-item:last-of-type::after {
  width: var(--track-path-width);
}
.development-history .track-axis .path-group .path-item:first-of-type::before,
.development-history .track-axis .path-group-swiper .path-item:first-of-type::before {
  left: calc(var(--track-path-width) / -2);
}
.development-history .track-axis .path-group .path-item:last-of-type::after,
.development-history .track-axis .path-group-swiper .path-item:last-of-type::after {
  right: calc(var(--track-path-width) / -2);
}
.development-history .track-axis .path-group {
  display: flex;
  align-items: center;
}
.development-history .track-axis .path-group-swiper .swiper-wrapper {
  display: flex;
  align-items: center;
  transition-timing-function: linear;
}
.development-history .track-axis .car {
  --car-aspect-ratio: 164 / 75;
  --car-position: calc(var(--track-path-height) * var(--car-aspect-ratio) / -2);
  position: absolute;
  top: 0;
  left: var(--car-position);
  width: calc(var(--track-path-height) * var(--car-aspect-ratio));
  height: var(--track-path-height);
  aspect-ratio: var(--car-aspect-ratio);
  z-index: 2;
  background: url('../assets/car-plain-view.png') center / contain no-repeat;
  filter: drop-shadow(0 0 8px rgba(0, 0, 0, 0.25));
  transition: left 1s ease-in-out;
}
.development-history .track-axis .car.backwards {
  transform: rotateY(180deg);
}
.development-history .events-swiper .events-group {
  padding: 60px 20px;
  transition: filter 0.5s;
}
.development-history .events-swiper .events-group .events-title {
  font-size: 1.5em;
}
.development-history .events-swiper .events-group .events {
  font-size: 1em;
}
.development-history .events-swiper .events-group .events .events-item {
  flex-direction: column;
}
.development-history .events-swiper .events-group:not(.swiper-slide-active) {
  filter: blur(2px) opacity(0.75);
}