:root {
  --red: #c60012;
  --dark: #101624;
  --soft: #f3f3f3;
  --text: #202020;
  --muted: #6f7379;
  --container: 1200px
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #fff
}

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

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto
}

.site-header {
  height: 200px;
  background: #fff;
  position: relative;
  z-index: 20
}

.site-header--overlay {
  position: absolute;
  inset: 0 0 auto;
  background: transparent;
  color: #fff
}

.nav-wrap {
  width: calc(100% - 310px);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 15px;
  line-height: 1;
}

.brand .logo-image {
  object-fit: cover;
}

.brand .logo-text {
  font-size: 36px;
  font-weight: 600;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 40px;
  color: #fff;
  background: var(--red);
  font: 900 23px Arial;
  border-radius: 2px
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 80px;
}

.main-nav a {
  height: 100%;
  display: grid;
  place-items: center;
  font-size: 22px;
  position: relative
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: -20px;
  right: -20px;
  bottom: -32px;
  height: 8px;
  background: var(--red);
  transform: scaleX(0);
  transition: .25s
}

.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1)
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 10px
}

.menu-toggle span {
  display: block;
  width: 27px;
  height: 2px;
  background: currentColor;
  margin: 6px
}

.home-hero {
  height: 1084px;
  display: grid;
  place-items: center;
  color: #fff;
  background-image: url("../images/home.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.hero-content {
  margin-top: 10px
}

.hero-content h1 {
  font-size: 62px;
  letter-spacing: 5px;
  margin: 0 0 0px
}

.hero-content p {
  font-size: 14px;
  letter-spacing: 1px;
  margin: 32px 0 0
}

.achievements {
  display: flex;
  justify-content: flex-end;
  width: calc(100% - 360px);
  margin-top: -240px;
  position: relative;
  background-color: rgba(255, 255, 255, 1);
  z-index: 2
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.25fr;
  width: 1200px;
  min-height: 200px;
}

.achievement-grid>div {
  background: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.achievement-grid strong {
  font-size: 40px
}

.achievement-grid span {
  font-size: 18px;
  margin-top: 10px
}

.achievement-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--red) !important;
  color: #fff
}

.achievement-title strong {
  font-size: 28px
}

.achievement-title span {
  font-size: 22px;
  margin-top: 15px
}

.section {
  padding: 100px 0 0
}

.home-about {
  min-height: 879px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  padding-bottom: 0;
  background: linear-gradient(#fff, #eef8ff)
}

.home-about-photo {
  height: 879px;
  background-image: url("../images/home-about.png");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: bottom center;
  align-self: end
}

.home-about-copy {
  max-width: 560px;
}

.home-about-copy h2 {
  font-size: 22px;
  margin: 0 0 28px
}

.eyebrow,
.section-heading h2 {
  font-size: 46px;
  font-weight: 600;
  margin: 0 0 10px
}

.home-about-copy p:not(.eyebrow) {
  color: #555;
  line-height: 2;
  font-size: 16px
}

.button {
  display: inline-block;
  margin-top: 22px;
  background: #b8172b;
  color: #fff;
  padding: 20px 52px;
  font-weight: 700;
  font-size: 18px
}

.section--soft {
  background: #f7f4f4
}

.section-heading {
  text-align: center;
  margin-bottom: 45px
}

.section-heading h2 {
  letter-spacing: 1px
}

.section-heading p {
  margin: 0;
  font-size: 22px
}

.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 120px 80px;
  padding: 0 0 150px;
}

.matrix-card {
  display: flex;
  justify-content: center;
  height: 400px;
  background-position: center;
  background-size: cover;
  position: relative
}

.matrix-card--1 {
  background-image: url("../images/product-bg-01.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.matrix-card--2 {
  background-image: url("../images/product-bg-02.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.matrix-card--3 {
  background-image: url("../images/product-bg-03.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.matrix-card--4 {
  background-image: url("../images/product-bg-04.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.matrix-card>div {
  position: absolute;
  bottom: -65px;
  width: 78%;
  min-height: 168px;
  padding: 35px;
  color: #fff;
  background: var(--red)
}

.matrix-card h3 {
  font-size: 24px;
  margin: 0 0 8px
}

.matrix-card small {
  position: relative;
  font-size: 12px
}

.matrix-card small::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -25px;
  width: 25px;
  height: 3px;
  background-color: rgba(255, 255, 255, 1);
}

.matrix-card p {
  font-size: 16px;
  line-height: 1.75;
  padding-top: 40px
}

.culture {
  overflow: hidden
}

.culture-orbit {
  width: calc(100% - 600px);
  min-height: 900px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  gap: 80px;
  position: relative;
  padding: 70px 75px 150px 50px;
  margin: 0 auto;
  background-image: url("../images/culture-bg.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.culture-card {
  z-index: 1;
  min-height: 328px;
  text-align: center;
  padding: 60px 40px;
  background: linear-gradient(180deg, rgba(255, 235, 238, 0.95), rgba(255, 255, 255, 0.8) 50%);
  border-radius: 12px;
  border: 2px solid rgba(255, 255, 255, 1);
  box-shadow: 0 2px 12px rgba(0, 120, 255, 0.5)
}

.culture-card:nth-child(1) {
  margin-top: -60px
}

.culture-card:nth-child(2) {
  margin-top: 160px
}

.culture-card:nth-child(3) {
  margin-top: 80px
}

.culture-card:nth-child(4) {
  margin-top: -70px
}

.culture-card h3 {
  font-size: 26px
}

.culture-card p {
  font-size: 16px;
  line-height: 1.8;
  color: #555
}

.home-contact {
  height: 750px;
  background: linear-gradient(180deg, #1379ee, #bcd8fa 75%);
  position: relative;
  overflow: hidden
}

.home-contact::after {
  content: "";
  position: absolute;
  top: 0;
  right: 200px;
  width: 100%;
  height: 100%;
  background-image: url("../images/contact-bg.png");
  background-repeat: no-repeat;
  background-position: bottom right;
}

.home-contact-copy {
  position: relative;
  z-index: 2;
  padding-top: 130px
}

.home-contact-copy h2 {
  font-size: 52px;
  letter-spacing: 2px
}

.home-contact-copy span {
  background: #1d60cf;
  color: #fff;
  padding: 5px 15px;
  font-size: 22px;
}

.home-contact-copy p:first-of-type {
  margin: 30px 0 0;
}

.home-contact-copy p {
  display: flex;
  align-items: center;
  font-size: 18px;
  margin: 10px 0 0;
}

.home-contact-copy p img {
  object-fit: cover;
  margin-right: 8px;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 0;
  background-color: rgba(20, 26, 50, 1);
}

.footer a,
.item-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 1);
}

.footer a {
  margin: 0 10px;
}

/* =========================
   Mobile responsive styles
   PC styles above remain unchanged
   ========================= */
@media (max-width: 768px) {
  .container {
    width: calc(100% - 32px);
  }

  .site-header {
    height: 72px;
  }

  .nav-wrap {
    width: calc(100% - 32px);
    position: relative;
  }

  .brand {
    gap: 10px;
  }

  .brand .logo-image {
    max-width: 42px;
    height: auto;
  }

  .brand .logo-text {
    font-size: 22px;
  }

  .menu-toggle {
    display: block;
    color: inherit;
    cursor: pointer;
    position: relative;
    z-index: 22;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: -16px;
    right: -16px;
    padding: 10px 16px 18px;
    gap: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(16, 22, 36, 0.96);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.16);
  }

  .main-nav.is-open,
  .menu-toggle[aria-expanded="true"]+.main-nav {
    display: flex;
  }

  .main-nav a {
    height: auto;
    padding: 14px 8px;
    font-size: 16px;
    text-align: center;
  }

  .main-nav a::after {
    left: 35%;
    right: 35%;
    bottom: 5px;
    height: 3px;
  }

  .home-hero {
    height: 520px;
    min-height: 520px;
    padding: 72px 0 30px;
    background-size: cover;
    background-position: center top;
  }

  .hero-content {
    margin-top: 0;
    text-align: center;
  }

  .hero-content h1 {
    font-size: clamp(28px, 8vw, 42px);
    line-height: 1.35;
    letter-spacing: 2px;
  }

  .hero-content p {
    margin-top: 18px;
    font-size: 11px;
    line-height: 1.7;
    letter-spacing: .5px;
  }

  .achievements {
    width: calc(100% - 32px);
    margin: -45px auto 0;
    justify-content: center;
  }

  .achievement-grid {
    width: 100%;
    min-height: 0;
    grid-template-columns: 1fr 1fr;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
  }

  .achievement-grid>div {
    min-height: 112px;
    padding: 18px 10px;
    text-align: center;
    align-items: center;
  }

  .achievement-grid strong {
    font-size: 28px;
  }

  .achievement-grid span {
    font-size: 14px;
    margin-top: 6px;
  }

  .achievement-title strong {
    font-size: 20px;
  }

  .achievement-title span {
    font-size: 16px;
    margin-top: 8px;
  }

  .section {
    padding-top: 64px;
  }

  .home-about {
    min-height: 0;
    grid-template-columns: 1fr;
    padding-top: 56px;
  }

  .home-about-photo {
    height: min(72vw, 430px);
    background-size: cover;
    background-position: center bottom;
  }

  .home-about-copy {
    max-width: none;
    padding: 36px 16px 56px;
  }

  .eyebrow,
  .section-heading h2 {
    font-size: 32px;
  }

  .home-about-copy h2,
  .section-heading p {
    font-size: 18px;
  }

  .home-about-copy h2 {
    margin-bottom: 20px;
  }

  .home-about-copy p:not(.eyebrow) {
    font-size: 14px;
    line-height: 1.85;
  }

  .button {
    margin-top: 12px;
    padding: 14px 34px;
    font-size: 15px;
  }

  .section-heading {
    margin-bottom: 32px;
    padding: 0 16px;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
    gap: 94px;
    padding: 0 0 110px;
  }

  .matrix-card {
    height: min(58vw, 360px);
    min-height: 220px;
  }

  .matrix-card--1,
  .matrix-card--2,
  .matrix-card--3,
  .matrix-card--4 {
    background-size: cover;
    background-position: center;
  }

  .matrix-card>div {
    bottom: -58px;
    width: calc(100% - 32px);
    min-height: 145px;
    padding: 24px;
  }

  .matrix-card h3 {
    font-size: 21px;
  }

  .matrix-card p {
    margin-bottom: 0;
    padding-top: 30px;
    font-size: 14px;
    line-height: 1.7;
  }

  .matrix-card small::after {
    bottom: -18px;
  }

  .culture {
    padding-bottom: 48px;
  }

  .culture-orbit {
    width: calc(100% - 32px);
    min-height: 0;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 30px 0;
    background-size: cover;
    background-position: center;
  }

  .culture-card,
  .culture-card:nth-child(1),
  .culture-card:nth-child(2),
  .culture-card:nth-child(3),
  .culture-card:nth-child(4) {
    min-height: 250px;
    margin-top: 0;
    padding: 34px 18px;
  }

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

  .culture-card p {
    font-size: 14px;
  }

  .home-contact {
    height: 510px;
  }

  .home-contact::after {
    right: -28%;
    width: 130%;
    background-size: auto 72%;
    opacity: .82;
  }

  .home-contact-copy {
    padding-top: 72px;
  }

  .home-contact-copy h2 {
    margin: 0 0 22px;
    font-size: 38px;
  }

  .home-contact-copy span {
    font-size: 17px;
  }

  .home-contact-copy p {
    max-width: 90%;
    align-items: flex-start;
    font-size: 14px;
    line-height: 1.7;
    word-break: break-word;
  }

  .home-contact-copy p img {
    flex: 0 0 auto;
    margin-top: 3px;
  }

  .footer {
    flex-direction: column;
    gap: 8px;
    padding: 18px 16px;
    text-align: center;
  }

  .footer a {
    margin: 0;
  }
}

@media (max-width: 480px) {
  .home-hero {
    height: 460px;
    min-height: 460px;
  }

  .hero-content h1 {
    font-size: 30px;
  }

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

  .achievement-grid>div {
    min-height: 100px;
  }

  .achievement-grid strong {
    font-size: 24px;
  }

  .culture-orbit {
    grid-template-columns: 1fr;
  }

  .culture-card,
  .culture-card:nth-child(1),
  .culture-card:nth-child(2),
  .culture-card:nth-child(3),
  .culture-card:nth-child(4) {
    min-height: 0;
    padding: 28px 20px;
  }

  .home-contact::after {
    right: -55%;
    width: 155%;
    opacity: .55;
  }
}