:root {
  color-scheme: light;
  --ink: #101827;
  --ink-soft: #38445a;
  --paper: #f6f8fb;
  --white: #ffffff;
  --midnight: #07111f;
  --blue: #00a8c8;
  --blue-strong: #00d5ff;
  --green: #64c36f;
  --amber: #d69b2d;
  --line: rgba(16, 24, 39, 0.12);
  --dark-line: rgba(255, 255, 255, 0.16);
  --shadow: 0 22px 60px rgba(3, 13, 28, 0.18);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.en {
  display: none;
}

body.lang-en .cn {
  display: none;
}

body.lang-en .en {
  display: inline;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 52px);
  color: var(--white);
  background: rgba(7, 17, 31, 0.74);
  border-bottom: 1px solid var(--dark-line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img {
  width: 43px;
  height: 43px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.brand strong {
  display: block;
  font-size: 17px;
  line-height: 1.1;
  letter-spacing: 0;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.66);
  font-size: 11px;
  line-height: 1.1;
  letter-spacing: 0;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 2vw, 30px);
  flex: 1 1 auto;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}

.main-nav a {
  padding: 8px 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.main-nav a:hover {
  color: var(--white);
  border-color: var(--blue-strong);
}

.language-toggle,
.menu-button {
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.language-toggle {
  min-width: 62px;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  cursor: pointer;
}

.menu-button {
  display: none;
  width: 42px;
  height: 38px;
  padding: 9px;
  border-radius: 8px;
  cursor: pointer;
}

.menu-button span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 86vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 118px clamp(20px, 6vw, 72px) 42px;
  color: var(--white);
  background: var(--midnight);
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 17, 31, 0.95) 0%, rgba(7, 17, 31, 0.72) 42%, rgba(7, 17, 31, 0.18) 100%),
    linear-gradient(0deg, rgba(7, 17, 31, 0.88) 0%, rgba(7, 17, 31, 0.18) 55%, rgba(7, 17, 31, 0.52) 100%),
    url("assets/hero-cleanroom.png") center right / cover no-repeat;
  transform: scale(1.01);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 213, 255, 0.7), transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(56px, 8vw, 108px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  width: min(680px, 100%);
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(16px, 2vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
}

.primary-action {
  color: var(--midnight);
  background: var(--blue-strong);
}

.secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel {
  position: absolute;
  z-index: 1;
  right: clamp(20px, 5vw, 64px);
  bottom: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 1px;
  width: min(620px, calc(100% - 40px));
  border: 1px solid var(--dark-line);
  background: var(--dark-line);
  box-shadow: var(--shadow);
}

.hero-panel div {
  min-height: 92px;
  padding: 18px;
  background: rgba(7, 17, 31, 0.82);
}

.hero-panel strong {
  display: block;
  color: var(--blue-strong);
  font-size: 15px;
}

.hero-panel span {
  display: block;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

body.lang-en .hero-panel .en {
  display: block;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(var(--max), calc(100% - 40px));
  margin: 28px auto 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.quick-stats div {
  min-height: 130px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.quick-stats div:last-child {
  border-right: 0;
}

.quick-stats strong {
  display: block;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--ink);
}

.quick-stats span {
  display: block;
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 14px;
}

body.lang-en .quick-stats .en {
  display: block;
}

.section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  color: var(--ink-soft);
}

.section-label > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.section-label p {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.72fr);
  gap: 52px;
  align-items: center;
}

.section-copy h2,
.section-heading h2,
.matrix-copy h2,
.contact-panel h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-copy p,
.section-heading p,
.contact-panel p,
.matrix-copy p {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.process-photo {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.process-photo img {
  width: 100%;
  height: 560px;
  object-fit: cover;
}

.capabilities-section,
.cases-section {
  width: 100%;
  max-width: none;
  padding-left: max(20px, calc((100% - var(--max)) / 2));
  padding-right: max(20px, calc((100% - var(--max)) / 2));
}

.capabilities-section {
  background: #ffffff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 36px;
  margin-bottom: 34px;
}

.section-heading p {
  max-width: 460px;
  margin: 0;
}

.section-heading.compact {
  display: block;
  margin-bottom: 30px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.service-card {
  min-height: 238px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfd;
}

.service-index {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.service-card h3,
.case-card h3,
.workflow h3,
.news-list h3 {
  margin: 0;
  color: var(--ink);
  font-size: 21px;
  line-height: 1.2;
  letter-spacing: 0;
}

.service-card p,
.workflow p,
.news-list p {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.matrix-section {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  gap: 56px;
  align-items: start;
}

.matrix-table {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.matrix-table > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  min-height: 82px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.matrix-table strong {
  color: var(--ink);
}

.matrix-table span {
  color: var(--ink-soft);
}

.cases-section {
  color: var(--white);
  background: #111417;
}

.cases-section .section-label,
.cases-section .section-heading p {
  color: rgba(255, 255, 255, 0.68);
}

.cases-section .section-heading h2,
.cases-section .section-label p {
  color: var(--white);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.case-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: #1b2026;
}

.case-card img {
  width: 100%;
  height: 270px;
  object-fit: cover;
}

.case-card div {
  padding: 20px;
}

.case-card span {
  display: block;
  margin-bottom: 10px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.case-card h3 {
  color: var(--white);
}

.case-card p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.featured-case {
  grid-column: span 2;
}

.featured-case img {
  height: 360px;
}

.workflow-section {
  padding-bottom: 60px;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  background: var(--white);
}

.workflow > div {
  min-height: 230px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.workflow > div:last-child {
  border-right: 0;
}

.workflow span {
  display: inline-flex;
  margin-bottom: 42px;
  color: var(--amber);
  font-weight: 800;
}

.news-section {
  padding-top: 70px;
}

.news-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.news-list article {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.news-list time {
  display: block;
  margin-bottom: 42px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.contact-section {
  width: 100%;
  max-width: none;
  padding: 82px max(20px, calc((100% - var(--max)) / 2));
  background: var(--midnight);
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 56px;
  align-items: center;
  color: var(--white);
}

.contact-panel p {
  color: rgba(255, 255, 255, 0.72);
}

.contact-methods {
  display: grid;
  gap: 12px;
}

.contact-methods a {
  display: block;
  padding: 20px;
  border: 1px solid var(--dark-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.contact-methods span {
  display: block;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.contact-methods strong {
  display: block;
  margin-top: 8px;
  color: var(--white);
  font-size: 18px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px max(20px, calc((100% - var(--max)) / 2));
  color: rgba(255, 255, 255, 0.7);
  background: #050a12;
}

.site-footer .brand img {
  width: 36px;
  height: 36px;
}

.site-footer p {
  margin: 0;
  font-size: 13px;
}

body:not(.lang-en) .en {
  display: none !important;
}

body.lang-en .cn {
  display: none !important;
}

body.lang-en .en {
  display: inline !important;
}

body.lang-en .hero-panel .en,
body.lang-en .quick-stats .en,
body.lang-en .matrix-table .en,
body.lang-en .case-card .en,
body.lang-en .contact-methods .en {
  display: block !important;
}

@media (max-width: 980px) {
  .site-header {
    min-height: 68px;
  }

  .menu-button {
    display: inline-block;
    margin-left: auto;
  }

  .main-nav {
    position: fixed;
    inset: 68px 0 auto;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 8px 20px 20px;
    background: rgba(7, 17, 31, 0.96);
    border-bottom: 1px solid var(--dark-line);
  }

  body.nav-open .main-nav {
    display: grid;
  }

  .main-nav a {
    padding: 15px 0;
    border-bottom: 1px solid var(--dark-line);
  }

  .language-toggle {
    order: 2;
  }

  .hero {
    min-height: 88vh;
    padding-top: 108px;
    padding-bottom: 230px;
  }

  .hero-backdrop {
    background:
      linear-gradient(90deg, rgba(7, 17, 31, 0.94), rgba(7, 17, 31, 0.58)),
      linear-gradient(0deg, rgba(7, 17, 31, 0.92), rgba(7, 17, 31, 0.18)),
      url("assets/hero-cleanroom.png") center right / cover no-repeat;
  }

  .hero-panel {
    left: 20px;
    right: 20px;
    grid-template-columns: 1fr;
  }

  .hero-panel div {
    min-height: 72px;
    padding: 14px 16px;
  }

  .quick-stats,
  .service-grid,
  .case-grid,
  .workflow,
  .news-list,
  .split-layout,
  .matrix-section,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .quick-stats div,
  .workflow > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .quick-stats div:last-child,
  .workflow > div:last-child {
    border-bottom: 0;
  }

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 18px;
  }

  .featured-case {
    grid-column: span 1;
  }

  .featured-case img,
  .case-card img {
    height: 270px;
  }

  .process-photo img {
    height: 440px;
  }

  .contact-panel {
    gap: 30px;
  }

  .site-footer {
    display: grid;
  }
}

@media (max-width: 620px) {
  .brand small {
    display: none;
  }

  .site-header {
    gap: 10px;
    padding-inline: 14px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .language-toggle {
    min-width: 52px;
    padding: 0 10px;
  }

  .hero {
    min-height: 89vh;
    padding-inline: 18px;
  }

  .hero h1 {
    font-size: clamp(48px, 15vw, 76px);
  }

  .hero-copy {
    font-size: 16px;
  }

  .primary-action,
  .secondary-action {
    width: 100%;
  }

  .section,
  .quick-stats {
    width: calc(100% - 32px);
  }

  .section {
    padding: 70px 0;
  }

  .section-copy h2,
  .section-heading h2,
  .matrix-copy h2,
  .contact-panel h2 {
    font-size: clamp(30px, 10vw, 42px);
  }

  .matrix-table > div {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .process-photo img {
    height: 360px;
  }

  .case-card img,
  .featured-case img {
    height: 220px;
  }
}