:root {
  color-scheme: dark;
  --ink: #090b0f;
  --ink-deep: #050608;
  --ink-soft: #111419;
  --signal: #ff5c35;
  --signal-dark: #d93d19;
  --paper: #f5f4ef;
  --steel: #a6a6a3;
  --steel-dim: #74777c;
  --rule: rgba(245, 244, 239, 0.3);
  --rule-soft: rgba(245, 244, 239, 0.14);
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-condensed: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --shell: 96rem;
  --header-height: 7.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  background: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::selection {
  background: var(--signal);
  color: var(--ink);
}

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

img,
svg {
  display: block;
}

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

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--paper);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: none;
}

.shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: var(--header-height);
  padding-inline: var(--gutter);
  background: rgba(9, 11, 15, 0.96);
  color: var(--paper);
}

.site-header__inner {
  width: min(100%, calc(var(--shell) - (2 * var(--gutter))));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid var(--rule);
}

.site-header__inner::before {
  content: "";
  position: absolute;
  bottom: -1px;
  width: 2.7rem;
  height: 2px;
  background: var(--signal);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.1;
}

.brand__cn {
  font-size: clamp(1.15rem, 1.6vw, 1.7rem);
  font-weight: 900;
  letter-spacing: 0.08em;
}

.brand__en {
  color: var(--steel);
  font-family: var(--font-condensed);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.site-nav {
  align-self: stretch;
  display: flex;
  align-items: center;
}

.site-nav a {
  position: relative;
  min-width: 8.6rem;
  padding: 0.5rem 1.8rem;
  border-left: 1px solid var(--rule-soft);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 1.8rem;
  bottom: -0.65rem;
  left: 1.8rem;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--signal);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav__contact {
  border-right: 0;
}

.site-nav a.site-nav__login {
  min-width: 5.6rem;
  margin-left: 0.75rem;
  padding: 0.72rem 1.35rem;
  border: 1px solid var(--signal);
  background: var(--signal);
  color: var(--ink);
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.site-nav a.site-nav__login::after {
  display: none;
}

.site-nav a.site-nav__login:hover,
.site-nav a.site-nav__login:focus-visible {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--ink);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: max(48rem, 100svh);
  overflow: hidden;
  background: var(--ink);
}

.hero__media {
  position: absolute;
  z-index: -2;
  inset: 0 0 0 auto;
  width: 69%;
  height: 100%;
  object-fit: cover;
  object-position: 62% center;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 24%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 24%, #000 100%);
  animation: hero-image-in 1.4s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero__route {
  position: absolute;
  z-index: -1;
  top: 12%;
  right: 2.5%;
  width: min(38vw, 35rem);
  opacity: 0.82;
}

.hero__route-grid {
  fill: none;
  stroke: rgba(245, 244, 239, 0.08);
  stroke-width: 1;
}

.hero__route-line {
  fill: none;
  stroke: var(--signal);
  stroke-width: 2.5;
  stroke-linecap: square;
  stroke-dasharray: 7 5;
  animation: route-dash 9s linear infinite;
}

.hero__route-node {
  fill: var(--signal);
}

.hero__route-pin {
  fill: var(--ink);
  stroke: var(--signal);
  stroke-width: 4;
}

.hero__route-pin-core {
  fill: var(--signal);
}

.hero__inner {
  position: relative;
  min-height: max(48rem, 100svh);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 8.5rem;
}

.hero__copy {
  width: min(55%, 49rem);
  animation: hero-copy-in 800ms 120ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.4rem, 7.5vw, 8.5rem);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 1.05;
  text-wrap: balance;
}

.hero h1 span {
  display: inline-block;
  margin-right: 0.06em;
  color: var(--signal);
}

.hero__lead {
  width: fit-content;
  margin: clamp(1.75rem, 3vw, 3rem) 0 0;
  padding: 0.8rem 0 0.85rem 1.1rem;
  border-left: 1px solid var(--paper);
  border-bottom: 2px solid var(--signal);
  color: #d4d2cd;
  font-size: clamp(1rem, 1.45vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.14em;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: clamp(2rem, 4vw, 3.5rem);
}

.arrow-button,
.phone-cta {
  display: inline-flex;
  align-items: stretch;
  min-height: 4rem;
  background: var(--signal);
  color: var(--ink);
  font-weight: 800;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.arrow-button span {
  display: grid;
  place-items: center;
  padding: 0.8rem 1.4rem;
  border-right: 1px solid rgba(9, 11, 15, 0.45);
}

.arrow-button svg,
.phone-cta svg {
  width: 3.9rem;
  padding: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.arrow-button:hover,
.phone-cta:hover {
  background: var(--paper);
  transform: translateY(-2px);
}

.text-link {
  position: relative;
  color: var(--steel);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.text-link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.35rem;
  left: 0;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transition: transform 180ms ease;
}

.text-link:hover {
  color: var(--paper);
}

.text-link:hover::after {
  transform: scaleX(0.45);
}

.next-rail {
  position: absolute;
  right: var(--gutter);
  bottom: 2rem;
  left: var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "label label label" "title . arrow";
  align-items: center;
  min-height: 5.2rem;
  padding: 1rem 1.8rem 1rem 1.5rem;
  border-top: 1px solid var(--rule);
  border-right: 2px solid var(--signal);
  border-left: 1px solid var(--paper);
  transition: border-color 180ms ease, background 180ms ease;
}

.next-rail:hover {
  background: rgba(245, 244, 239, 0.035);
  border-left-color: var(--signal);
}

.next-rail__label {
  grid-area: label;
  color: var(--signal);
  font-family: var(--font-condensed);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.next-rail__title {
  grid-area: title;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.next-rail svg {
  grid-area: arrow;
  width: 2rem;
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.8;
  transition: transform 180ms ease;
}

.next-rail:hover svg {
  transform: translateX(0.35rem);
}

.section {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--rule-soft);
  background: var(--ink);
}

.section > .shell {
  position: relative;
  padding-top: clamp(5.5rem, 9vw, 9rem);
  padding-bottom: clamp(9rem, 13vw, 13rem);
}

.section-heading {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: clamp(1rem, 2vw, 2.5rem);
  align-items: start;
}

.section-heading__index {
  padding-top: 0.8rem;
  border-top: 2px solid var(--signal);
  color: var(--steel-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.section-heading h2,
.about h2,
.contact h2 {
  margin: 0;
  font-size: clamp(3rem, 6.2vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.065em;
  line-height: 1.07;
}

.process__steps {
  margin: clamp(4rem, 7vw, 7rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.process__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.4rem;
  min-height: 10rem;
  padding: 2rem clamp(1.25rem, 2.5vw, 2.8rem);
  border-left: 1px solid var(--rule-soft);
}

.process__steps li:first-child {
  padding-left: 0;
  border-left: 0;
}

.process__number {
  color: var(--paper);
  font-family: var(--font-condensed);
  font-size: clamp(3.8rem, 5vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.85;
}

.process__steps h3 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2rem);
  font-weight: 800;
  line-height: 1.1;
}

.process__steps p {
  margin: 0.7rem 0 0;
  color: var(--steel);
  font-size: 0.95rem;
}

.process__steps li:first-child h3,
.process__steps li:first-child .process__number {
  color: var(--signal);
}

.process__visual {
  position: relative;
  margin: clamp(2rem, 4vw, 4rem) calc(-1 * var(--gutter)) 0;
  overflow: hidden;
}

.process__visual img {
  width: 100%;
  min-height: 26rem;
  max-height: 44rem;
  object-fit: cover;
  object-position: center;
}

.process__track {
  position: absolute;
  top: 18%;
  right: 10%;
  left: 10%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--rule) 0 8px, transparent 8px 15px);
}

.process__progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 36%;
  background: var(--signal);
}

.process__track i {
  position: absolute;
  top: 50%;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--paper);
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.process__track i:nth-of-type(1) {
  left: 36%;
  border-color: var(--signal);
  box-shadow: 0 0 0 0 rgba(255, 92, 53, 0.45);
  animation: marker-pulse 2.4s ease-out infinite;
}

.process__track i:nth-of-type(2) {
  left: 66%;
}

.process__track i:nth-of-type(3) {
  left: 100%;
}

.next-rail--section {
  bottom: 2.5rem;
}

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(24rem, 0.85fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: end;
}

.about__statement .section-heading__index {
  display: block;
  width: 4.5rem;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.about h2 span {
  color: var(--signal);
}

.about__statement p {
  max-width: 47rem;
  margin: clamp(2rem, 4vw, 3.5rem) 0 0;
  color: var(--steel);
  font-size: clamp(1rem, 1.25vw, 1.2rem);
  line-height: 1.9;
}

.about__facts {
  margin: 0;
  border-top: 1px solid var(--rule);
}

.about__facts > div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  min-height: 8rem;
  border-bottom: 1px solid var(--rule);
}

.about__facts dt,
.about__facts dd {
  margin: 0;
  display: flex;
  align-items: center;
  padding: 1.5rem;
}

.about__facts dt {
  padding-left: 0;
  color: var(--signal);
  font-weight: 800;
  border-right: 1px solid var(--rule);
}

.about__facts dd {
  color: #d0cfcb;
}

.about__media {
  position: relative;
  margin: clamp(4rem, 7vw, 7rem) calc(-1 * var(--gutter)) 0;
  overflow: hidden;
}

.about__media::after {
  content: "";
  position: absolute;
  right: 8%;
  bottom: 12%;
  width: 1.2rem;
  height: 1.2rem;
  border: 2px solid var(--signal);
}

.about__media img {
  width: 100%;
  max-height: 36rem;
  object-fit: cover;
  object-position: center 64%;
}

.contact {
  border-top: 1px solid var(--signal);
}

.contact__signal {
  background: var(--signal);
  color: var(--ink);
}

.contact__signal-inner {
  min-height: min(43rem, 78svh);
  display: grid;
  align-content: center;
  justify-items: start;
  padding-top: clamp(5rem, 8vw, 8rem);
  padding-bottom: clamp(5rem, 8vw, 8rem);
}

.contact h2 {
  max-width: 58rem;
  font-size: clamp(4rem, 8vw, 9rem);
}

.phone-cta {
  margin-top: clamp(2.5rem, 4vw, 4rem);
  background: var(--ink);
  color: var(--paper);
}

.phone-cta svg {
  border-right: 1px solid rgba(245, 244, 239, 0.25);
}

.phone-cta span {
  display: grid;
  place-items: center;
  padding: 1rem 1.7rem;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  letter-spacing: 0.04em;
}

.phone-cta:hover {
  background: var(--paper);
  color: var(--ink);
}

.contact__details {
  background: var(--ink);
  padding-block: clamp(4rem, 7vw, 7rem);
}

.contact__manifest {
  margin: 0;
  border-top: 1px solid var(--rule);
}

.contact__manifest > div {
  display: grid;
  grid-template-columns: minmax(14rem, 22rem) 1fr;
  border-bottom: 1px solid var(--rule);
}

.contact__manifest dt,
.contact__manifest dd {
  margin: 0;
  min-height: 5.4rem;
  display: flex;
  align-items: center;
  padding: 1.2rem 1.5rem;
}

.contact__manifest dt {
  gap: clamp(1.2rem, 3vw, 4rem);
  padding-left: 0;
  color: var(--signal);
  border-right: 1px solid var(--rule);
  font-weight: 800;
}

.contact__manifest dt span {
  width: 0.9rem;
  height: 0.9rem;
  flex: 0 0 auto;
  border: 2px solid var(--signal);
}

.contact__manifest dd {
  color: #d7d6d1;
}

.contact__manifest a {
  position: relative;
}

.contact__manifest a::after,
.site-footer a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.25rem;
  left: 0;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.contact__manifest a:hover::after,
.site-footer a:hover::after {
  transform: scaleX(1);
}

.site-footer {
  border-top: 1px solid var(--rule);
  background: var(--ink-deep);
}

.site-footer__inner {
  min-height: 9rem;
  display: grid;
  grid-template-columns: 1fr 1.5fr auto;
  gap: clamp(2rem, 5vw, 6rem);
  align-items: center;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.site-footer__brand strong {
  font-size: 1.15rem;
  letter-spacing: 0.07em;
}

.site-footer__brand span {
  color: var(--steel-dim);
  font-family: var(--font-condensed);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.site-footer p,
.site-footer a {
  position: relative;
  margin: 0;
  color: var(--steel);
  font-size: 0.86rem;
}

@keyframes hero-image-in {
  from {
    opacity: 0;
    transform: scale(1.04);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes hero-copy-in {
  from {
    opacity: 0;
    transform: translateY(2rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes route-dash {
  to {
    stroke-dashoffset: -120;
  }
}

@keyframes marker-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 92, 53, 0.45);
  }
  65%,
  100% {
    box-shadow: 0 0 0 1.2rem rgba(255, 92, 53, 0);
  }
}

@media (max-width: 1120px) {
  :root {
    --header-height: 6.4rem;
  }

  .site-nav a {
    min-width: auto;
    padding-inline: 1.15rem;
  }

  .site-nav a.site-nav__login {
    min-width: 4.8rem;
    padding-inline: 1rem;
  }

  .hero__copy {
    width: 61%;
  }

  .hero h1 {
    font-size: clamp(4rem, 8vw, 6.5rem);
  }

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

  .about__facts {
    width: min(100%, 50rem);
    margin-left: auto;
  }
}

@media (max-width: 760px) {
  :root {
    --gutter: 1.25rem;
    --header-height: 5.6rem;
  }

  .site-header {
    padding-inline: var(--gutter);
  }

  .brand__cn {
    font-size: 1rem;
  }

  .brand__en {
    display: none;
  }

  .site-nav a {
    padding-inline: 0.65rem;
    border-left: 0;
    font-size: 0.75rem;
    letter-spacing: 0;
  }

  .site-nav a:first-child {
    display: none;
  }

  .site-nav a.site-nav__login {
    min-width: auto;
    margin-left: 0.35rem;
    padding: 0.55rem 0.75rem;
  }

  .hero,
  .hero__inner {
    min-height: max(43rem, 100svh);
  }

  .hero__media {
    inset: 42% 0 0;
    width: 100%;
    height: 58%;
    object-position: 68% center;
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 28%, #000 100%);
    mask-image: linear-gradient(180deg, transparent 0%, #000 28%, #000 100%);
  }

  .hero__route {
    top: 42%;
    right: -15%;
    width: 78vw;
    opacity: 0.6;
  }

  .hero__inner {
    justify-content: flex-start;
    padding-top: calc(var(--header-height) + 3rem);
    padding-bottom: 7.5rem;
  }

  .hero__copy {
    width: 100%;
  }

  .hero h1 {
    max-width: 22rem;
    font-size: clamp(3.2rem, 14.5vw, 5rem);
    line-height: 1.08;
  }

  .hero__lead {
    margin-top: 1.4rem;
    padding-block: 0.45rem;
    font-size: 0.88rem;
    letter-spacing: 0.08em;
  }

  .hero__actions {
    gap: 1.2rem;
    margin-top: 1.5rem;
  }

  .arrow-button {
    min-height: 3.35rem;
  }

  .arrow-button svg {
    width: 3.2rem;
    padding: 0.85rem;
  }

  .arrow-button span {
    padding-inline: 1rem;
    font-size: 0.88rem;
  }

  .next-rail {
    bottom: 1rem;
    min-height: 4.4rem;
    padding: 0.75rem 1rem;
  }

  .next-rail__title {
    font-size: 1rem;
  }

  .section > .shell {
    padding-top: 4.5rem;
    padding-bottom: 8rem;
  }

  .section-heading {
    grid-template-columns: 3rem 1fr;
  }

  .section-heading h2,
  .about h2 {
    font-size: clamp(2.7rem, 12vw, 4.5rem);
  }

  .process__steps {
    margin-top: 3rem;
    grid-template-columns: 1fr;
    border-bottom: 0;
  }

  .process__steps li,
  .process__steps li:first-child {
    min-height: auto;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--rule-soft);
    border-left: 0;
  }

  .process__number {
    width: 4rem;
    font-size: 3.5rem;
  }

  .process__visual {
    margin-top: 2rem;
  }

  .process__visual img {
    min-height: 22rem;
    object-position: center;
  }

  .process__track {
    top: 14%;
    right: 7%;
    left: 7%;
  }

  .about__grid {
    gap: 3rem;
  }

  .about__statement .section-heading__index {
    margin-bottom: 2rem;
  }

  .about__statement p {
    margin-top: 1.75rem;
    font-size: 0.95rem;
    line-height: 1.8;
  }

  .about__facts > div {
    grid-template-columns: 6.5rem 1fr;
    min-height: 6.5rem;
  }

  .about__facts dt,
  .about__facts dd {
    padding: 1rem;
    font-size: 0.9rem;
  }

  .about__facts dt {
    padding-left: 0;
  }

  .about__media {
    margin-top: 3.5rem;
  }

  .about__media img {
    min-height: 20rem;
  }

  .contact__signal-inner {
    min-height: 34rem;
  }

  .contact h2 {
    font-size: clamp(3.8rem, 17vw, 6.4rem);
  }

  .phone-cta {
    min-height: 3.8rem;
  }

  .phone-cta span {
    padding-inline: 1.1rem;
  }

  .contact__manifest > div {
    grid-template-columns: 1fr;
    padding: 1.15rem 0;
  }

  .contact__manifest dt,
  .contact__manifest dd {
    min-height: auto;
    padding: 0.35rem 0;
    border: 0;
  }

  .contact__manifest dt {
    gap: 0.75rem;
    font-size: 0.85rem;
  }

  .contact__manifest dt span {
    width: 0.65rem;
    height: 0.65rem;
  }

  .contact__manifest dd {
    padding-left: 1.4rem;
    word-break: break-word;
  }

  .site-footer__inner {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 1.3rem;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}