:root {
  --black: #0b0b0d;
  --text: #171717;
  --muted: #666b73;
  --line: #e7e7e7;
  --soft: #f7f7f7;
  --white: #ffffff;
  --red: #0b8f8a;
  --red-dark: #075f73;
  --signal: #19c2b5;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.12);
  --page-max: 1520px;
  --hero-max: 1600px;
  --page-gutter: clamp(32px, 4vw, 72px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 96px;
  padding: 0 clamp(20px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 34px;
  place-items: center;
  background: var(--black);
  color: var(--white);
  font-size: 13px;
  font-weight: 900;
}

.brand-logo {
  display: inline-flex;
  width: 218px;
  height: 86px;
  flex: 0 0 auto;
  align-items: center;
}

.brand-logo svg,
.brand-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-size: 19px;
  line-height: 1.1;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(18px, 3vw, 36px);
  color: #2b2b2b;
  font-size: 15px;
  font-weight: 800;
}

.site-nav a {
  padding: 28px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-email {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.lang-toggle,
.menu-toggle {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--black);
}

.lang-toggle {
  min-width: 44px;
  height: 38px;
  font-weight: 900;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 38px;
  place-items: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--black);
}

.hero {
  display: grid;
  grid-template-columns: minmax(480px, 0.95fr) minmax(480px, 1.05fr);
  gap: clamp(40px, 5vw, 74px);
  align-items: center;
  width: min(var(--hero-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: clamp(56px, 7vw, 92px) 0 clamp(52px, 6vw, 76px);
}

.hero-copy,
.hero-media,
.space-card,
.capability-list,
.solution-grid,
.service-map,
.brand-cloud {
  min-width: 0;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 18px;
  color: var(--red);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.03em;
}

.kicker::before {
  content: "";
  width: 52px;
  height: 3px;
  background: currentColor;
}

.hero h1 {
  margin: 0;
  color: var(--black);
  max-width: 880px;
  font-size: clamp(36px, 3.45vw, 56px);
  line-height: 1.14;
  letter-spacing: 0;
}

.hero p:not(.kicker) {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.45vw, 20px);
}

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

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  font-weight: 900;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--red-dark);
}

.btn-secondary {
  border: 1px solid var(--black);
  color: var(--black);
}

.hero-media {
  position: relative;
  border: 0;
  padding: 0;
  background: var(--soft);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-media img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-strip div {
  min-height: 132px;
  padding: 26px clamp(20px, 3vw, 36px);
  border-right: 1px solid var(--line);
}

.proof-strip div:last-child {
  border-right: 0;
}

.proof-strip strong {
  display: block;
  margin-bottom: 8px;
  color: var(--black);
  font-size: 19px;
}

.proof-strip span {
  display: block;
  color: var(--muted);
}

.capability-band {
  display: grid;
  grid-template-columns: minmax(320px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(36px, 5vw, 72px);
  width: min(var(--page-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: clamp(64px, 8vw, 96px) 0 0;
}

.capability-intro {
  position: sticky;
  top: 104px;
  align-self: start;
}

.capability-intro h2 {
  margin: 0;
  color: var(--black);
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.18;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.capability-list article {
  min-height: 210px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.capability-list span {
  display: inline-flex;
  margin-bottom: 30px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.capability-list h3 {
  margin: 0 0 12px;
  color: var(--black);
  font-size: 22px;
  line-height: 1.22;
}

.capability-list p {
  margin: 0;
  color: var(--muted);
}

.section {
  width: min(var(--page-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 120px) 0;
}

.muted-section {
  width: auto;
  max-width: none;
  margin: 0;
  padding-left: max(20px, calc((100vw - var(--page-max)) / 2));
  padding-right: max(20px, calc((100vw - var(--page-max)) / 2));
  background: var(--soft);
}

.section-head {
  max-width: 980px;
  margin-bottom: 36px;
}

.section-head h2 {
  margin: 0;
  color: var(--black);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-head p:not(.kicker) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.solution-grid article {
  min-height: 260px;
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.solution-grid span,
.service-map span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--red);
  font-weight: 900;
}

.solution-grid h3,
.space-card h3,
.service-map h3,
.service-note h3 {
  margin: 0 0 12px;
  color: var(--black);
  font-size: 24px;
  line-height: 1.2;
}

.solution-grid p,
.space-card p,
.service-map p,
.service-note p {
  margin: 0;
  color: var(--muted);
}

.standard-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: clamp(36px, 6vw, 82px);
  align-items: stretch;
  padding: clamp(70px, 8vw, 108px) max(20px, calc((100vw - var(--page-max)) / 2));
  background: var(--black);
  color: var(--white);
}

.standard-copy h2 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(32px, 3.7vw, 50px);
  line-height: 1.14;
}

.standard-copy p:not(.kicker) {
  max-width: 700px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.standard-board {
  display: grid;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.standard-board div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 22px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.standard-board span {
  color: var(--signal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.standard-board strong {
  color: var(--white);
  font-size: clamp(19px, 2vw, 26px);
  line-height: 1.3;
}

.engineering-section {
  display: grid;
  grid-template-columns: minmax(420px, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
  width: min(var(--page-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: clamp(72px, 9vw, 118px) 0;
}

.engineering-media button {
  position: relative;
  width: 100%;
  border: 0;
  padding: 0;
  background: var(--soft);
  overflow: hidden;
}

.engineering-media img {
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.engineering-copy h2 {
  margin: 0;
  color: var(--black);
  font-size: clamp(32px, 3.7vw, 50px);
  line-height: 1.14;
}

.engineering-copy p:not(.kicker) {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.engineering-points {
  display: grid;
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.engineering-points div {
  display: grid;
  gap: 7px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.engineering-points strong {
  color: var(--black);
  font-size: 20px;
}

.engineering-points span {
  color: var(--muted);
}

.space-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.space-card {
  display: grid;
  background: var(--white);
  border: 1px solid var(--line);
}

.space-card.large {
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1.25fr) minmax(340px, 0.75fr);
}

.space-card button {
  position: relative;
  border: 0;
  padding: 0;
  overflow: hidden;
  background: var(--soft);
}

.space-card img {
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.space-card button:hover img {
  transform: scale(1.035);
}

.space-card div {
  padding: 30px;
}

.space-card span {
  display: block;
  margin-bottom: 12px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.configuration-section {
  width: min(var(--page-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: clamp(72px, 9vw, 118px) 0;
}

.config-table {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.config-table article {
  min-height: 250px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.config-table span {
  display: inline-flex;
  margin-bottom: 42px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.config-table strong {
  display: block;
  margin-bottom: 12px;
  color: var(--black);
  font-size: 24px;
  line-height: 1.2;
}

.config-table p {
  margin: 0;
  color: var(--muted);
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 26px;
}

.service-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.service-map article {
  min-height: 220px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-note {
  padding: 32px;
  background: var(--black);
  color: var(--white);
}

.service-note h3 {
  color: var(--white);
  font-size: 30px;
}

.service-note p:not(.kicker) {
  color: rgba(255, 255, 255, 0.76);
}

.brand-cloud {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--white);
}

.brand-cloud > span {
  position: relative;
  display: flex;
  min-height: 150px;
  align-items: center;
  justify-content: center;
  padding: 28px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: #111318;
  line-height: 1;
  text-align: center;
  background: var(--white);
  border-top: 3px solid transparent;
  transition: opacity 0.2s ease;
}

.brand-cloud > span:hover {
  border-top-color: var(--signal);
  background: #fbfdfd;
}

.brand-cloud strong {
  display: block;
  color: var(--black);
  font-size: clamp(24px, 2.1vw, 34px);
  font-weight: 900;
  letter-spacing: 0;
}

.brand-cloud img,
.brand-logo-slot {
  display: block;
  width: min(230px, 92%);
  height: 72px;
  object-fit: contain;
  object-position: center;
}

.brand-logo-slot {
  color: var(--black);
  font-size: clamp(24px, 2.1vw, 34px);
  font-weight: 900;
}

.brand-logo-slot.wide {
  width: min(250px, 96%);
}

.brand-logo-slot svg {
  display: block;
  width: 100%;
  height: 100%;
}

.contact-section {
  padding: clamp(72px, 9vw, 110px) max(20px, calc((100vw - var(--page-max)) / 2));
  background: var(--black);
  color: var(--white);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 46px;
  align-items: center;
}

.contact-inner h2 {
  margin: 0;
  font-size: clamp(34px, 4.3vw, 56px);
  line-height: 1.12;
}

.contact-inner p:not(.kicker) {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.contact-card {
  display: grid;
  gap: 14px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-style: normal;
}

.contact-card a {
  color: var(--signal);
  font-weight: 900;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(20px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.media-dialog {
  width: min(1180px, calc(100% - 34px));
  padding: 0;
  border: 0;
  background: transparent;
}

.media-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
}

.dialog-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  width: 44px;
  height: 44px;
  border: 0;
  background: var(--white);
  color: var(--black);
  font-size: 28px;
}

.dialog-content {
  background: var(--black);
}

.lightbox-image {
  max-height: 88vh;
  object-fit: contain;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .site-nav {
    position: fixed;
    top: 88px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    gap: 0;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 15px 18px;
    border-bottom: 1px solid var(--line);
  }

  .header-actions {
    justify-self: end;
  }

  .header-email {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .hero,
  .capability-band,
  .standard-section,
  .engineering-section,
  .space-card.large,
  .service-layout,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .proof-strip,
  .capability-list,
  .solution-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-cloud {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .capability-intro {
    position: static;
  }
}

@media (max-width: 680px) {
  * {
    min-width: 0 !important;
  }

  body * {
    overflow-wrap: anywhere;
  }

  body,
  main,
  section,
  header,
  footer {
    max-width: 100vw;
  }

  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    padding: 0 12px;
  }

  .brand {
    gap: 8px;
    padding-right: 52px;
  }

  .brand-mark {
    width: 40px;
    height: 32px;
  }

  .brand-logo {
    width: 172px;
    height: 68px;
  }

  .brand strong {
    display: none;
  }

  .brand small,
  .header-email {
    display: none;
  }

  .header-actions {
    position: static;
    transform: none;
    gap: 6px;
  }

  .lang-toggle {
    position: fixed;
    top: 20px;
    left: min(338px, calc(100vw - 52px));
    right: auto;
    z-index: 60;
    min-width: 36px;
    height: 38px;
  }

  .menu-toggle {
    display: none;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) !important;
    width: calc(100vw - 32px);
    padding-top: 46px;
    overflow: hidden;
  }

  .hero-copy,
  .hero-media {
    width: 100%;
    max-width: calc(100vw - 32px);
    overflow: hidden;
  }

  .capability-band,
  .standard-section,
  .engineering-section,
  .space-card.large,
  .service-layout,
  .contact-inner {
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100%;
    max-width: 100vw;
  }

  .proof-strip,
  .capability-list,
  .solution-grid,
  .config-table,
  .space-grid,
  .service-map {
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100%;
    max-width: 100%;
  }

  .brand-cloud {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    width: 100%;
    max-width: 100%;
  }

  .hero h1 {
    width: min(320px, 100%);
    max-width: 100%;
    font-size: 26px;
    line-height: 1.18;
    overflow-wrap: anywhere;
    word-break: break-all;
    line-break: anywhere;
    white-space: normal;
  }

  .hero p:not(.kicker),
  .proof-strip span,
  .capability-list p,
  .solution-grid p,
  .space-card p,
  .service-map p,
  .service-note p,
  .standard-copy p:not(.kicker),
  .engineering-copy p:not(.kicker) {
    overflow-wrap: anywhere;
    word-break: break-all;
    line-break: anywhere;
    max-width: min(320px, calc(100vw - 40px));
  }

  .proof-strip span,
  .config-table p,
  .brand-cloud > span {
    max-width: 100%;
    white-space: normal;
  }

  .section-head h2,
  .capability-intro h2,
  .standard-copy h2,
  .engineering-copy h2,
  .contact-inner h2 {
    width: min(320px, 100%);
    font-size: 28px;
    line-height: 1.18;
    overflow-wrap: anywhere;
    word-break: break-all;
    line-break: anywhere;
  }

  .proof-strip div,
  .capability-list article,
  .solution-grid article,
  .config-table article,
  .service-map article,
  .space-card div {
    padding-left: 20px;
    padding-right: 20px;
  }

  .capability-band,
  .engineering-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 10px;
  }

  .btn {
    width: 100%;
    flex: 1 1 auto;
    padding: 0 14px;
  }

  .hero-media img,
  .engineering-media img {
    aspect-ratio: 4 / 3;
  }

  .space-card img {
    min-height: 230px;
  }

  .proof-strip,
  .capability-list,
  .solution-grid,
  .config-table,
  .space-grid,
  .service-map {
    grid-template-columns: 1fr;
  }

  .section,
  .muted-section,
  .configuration-section {
    width: auto;
    padding-left: 16px;
    padding-right: 16px;
  }

  .standard-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .standard-board div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    flex-direction: column;
  }
}