:root {
  --blue: #28378f;
  --blue-deep: #1f2b78;
  --green: #36aa43;
  --teal: #0f8f83;
  --ink: #202431;
  --muted: #667085;
  --line: #d8dde8;
  --paper: #ffffff;
  --soft: #f4f7f5;
  --warm: #f6f3ed;
  --shadow: 0 18px 45px rgba(31, 43, 120, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.65;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(216, 221, 232, 0.75);
  backdrop-filter: blur(16px);
  transition: box-shadow 0.2s ease, min-height 0.2s ease;
}

.site-header.is-scrolled {
  min-height: 66px;
  box-shadow: 0 8px 30px rgba(31, 43, 120, 0.08);
}

.header-right {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 250px;
}

.brand > span:not(.brand-logos) {
  display: none;
}

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

.brand-logo {
  display: block;
  width: auto;
  object-fit: contain;
}

.brand-logo-zyf {
  height: 34px;
}

.brand-logo-zero {
  height: 48px;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--paper);
  background: linear-gradient(135deg, var(--green), var(--blue));
  border-radius: 50%;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand strong {
  display: block;
  color: var(--blue);
  font-size: 17px;
  line-height: 1.2;
  white-space: nowrap;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.2vw, 34px);
  color: #344054;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a {
  position: relative;
  padding: 9px 0;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

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

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: #f4f7f5;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.language-switch button {
  min-width: 32px;
  height: 28px;
  padding: 0 7px;
  color: var(--blue);
  background: transparent;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 900;
}

.language-switch button[aria-pressed="true"] {
  color: var(--paper);
  background: var(--blue);
}

html[dir="rtl"] body {
  text-align: right;
  font-family: Arial, "Tahoma", "Microsoft YaHei", sans-serif;
}

html[dir="rtl"] .site-header,
html[dir="rtl"] .header-right,
html[dir="rtl"] .site-nav,
html[dir="rtl"] .brand-logos,
html[dir="rtl"] .hero-actions,
html[dir="rtl"] .route {
  flex-direction: row-reverse;
}

html[dir="rtl"] .hero-bg {
  transform: scaleX(-1);
}

html[dir="rtl"] .hero-bg::after {
  transform: scaleX(-1);
}

html[dir="rtl"] .capability-list div {
  border-right: 4px solid var(--green);
  border-left: 0;
}

html[dir="rtl"] .business-grid article::before {
  background: linear-gradient(270deg, var(--blue), var(--green));
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--blue);
}

.hero {
  position: relative;
  min-height: min(760px, 92vh);
  padding: 146px clamp(20px, 7vw, 104px) 86px;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: linear-gradient(90deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.88) 34%, rgba(255,255,255,0.2) 70%), url("assets/hero-skyline-clean.jpg");
  background-repeat: no-repeat;
  background-position: right bottom;
  background-size: auto 92%;
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: -28%;
  left: 48%;
  z-index: -1;
  height: 42%;
  content: "";
  background: radial-gradient(ellipse at center, rgba(54, 170, 67, 0.18), rgba(54, 170, 67, 0));
}

.hero-content {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  color: var(--blue);
  font-size: clamp(42px, 6.2vw, 86px);
  line-height: 1.08;
  letter-spacing: 0;
}

h1 span,
.section h2 span {
  color: var(--green);
}

.hero-copy {
  max-width: 610px;
  margin-bottom: 34px;
  color: #3f4758;
  font-size: clamp(17px, 1.8vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 800;
}

.btn.primary {
  color: var(--paper);
  background: var(--blue);
}

.btn.secondary {
  color: var(--blue);
  background: rgba(255, 255, 255, 0.82);
  border-color: var(--blue);
}

.hero-strip {
  position: absolute;
  right: clamp(20px, 7vw, 104px);
  bottom: 26px;
  left: clamp(20px, 7vw, 104px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding-top: 20px;
  color: var(--blue);
  border-top: 1px solid rgba(40, 55, 143, 0.22);
  font-weight: 800;
}

.section {
  padding: clamp(64px, 8vw, 110px) clamp(20px, 7vw, 104px);
}

.section-head {
  max-width: 820px;
  margin-bottom: 42px;
}

.section-head.compact {
  max-width: 760px;
}

.section h2 {
  margin-bottom: 16px;
  color: var(--blue);
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section h3 {
  color: var(--blue-deep);
  font-size: 22px;
  line-height: 1.3;
}

.section p {
  color: #4a5162;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 22px;
}

.stat-row div {
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stat-row strong {
  display: block;
  color: var(--blue);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
}

.stat-row span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-weight: 700;
}

.position-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 230px;
  padding: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(31, 43, 120, 0.06);
}

.line-icon {
  display: inline-grid;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  place-items: center;
  color: var(--green);
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 15px;
  font-weight: 900;
}

.platform {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(340px, 1fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
  background: var(--soft);
}

.media-panel {
  min-height: 620px;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.media-panel img {
  height: 100%;
  object-fit: cover;
}

.capability-list {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.capability-list div {
  padding: 20px 22px;
  background: var(--paper);
  border-left: 4px solid var(--green);
  border-radius: 6px;
  box-shadow: 0 12px 32px rgba(31, 43, 120, 0.06);
}

.capability-list strong,
.capability-list span {
  display: block;
}

.capability-list strong {
  color: var(--blue);
  font-size: 20px;
}

.capability-list span {
  color: var(--muted);
}

.metrics-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--blue);
}

.metrics-band div {
  min-height: 180px;
  padding: 34px;
  background: rgba(255, 255, 255, 0.05);
}

.metrics-band span,
.metrics-band strong {
  display: block;
}

.metrics-band span {
  color: rgba(255, 255, 255, 0.76);
  font-weight: 700;
}

.metrics-band strong {
  margin-top: 14px;
  color: var(--paper);
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.15;
}

.business {
  background: #fbfcff;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.business-grid article {
  position: relative;
  min-height: 365px;
  padding: 28px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.business-grid article::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  content: "";
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.business-grid article > span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--green);
  font-size: 28px;
  font-weight: 900;
}

.business-grid ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.business-grid li {
  padding: 5px 10px;
  color: var(--blue);
  background: #eef4ff;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 800;
}

.strategy {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
}

.strategy img {
  max-height: 560px;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.route {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  color: var(--blue);
  font-weight: 900;
}

.route span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.route i {
  width: 42px;
  height: 2px;
  background: var(--green);
}

.cases {
  background: var(--warm);
}

.case-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 18px;
}

.case-card {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(32, 36, 49, 0.07);
}

.case-card.large {
  grid-row: span 2;
  display: grid;
  grid-template-rows: 1fr auto;
}

.case-card img {
  height: 220px;
  object-fit: cover;
}

.case-card.large img {
  height: 360px;
}

.case-card div,
.case-card h3,
.case-card span {
  margin-right: 22px;
  margin-left: 22px;
}

.case-card div {
  margin-top: 24px;
  margin-bottom: 28px;
}

.case-card span {
  display: block;
  margin-top: 18px;
  color: var(--green);
  font-weight: 900;
}

.case-card h3 {
  margin-top: 8px;
  margin-bottom: 24px;
  font-size: 19px;
}

.case-card strong {
  color: var(--green);
  font-size: 22px;
}

.cooperation {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(340px, 1fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: center;
}

.cooperation-media {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.cooperation-media img {
  height: 560px;
  object-fit: cover;
}

.solution-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.solution-list div {
  padding: 18px 20px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.solution-list strong,
.solution-list span {
  display: block;
}

.solution-list strong {
  color: var(--blue);
}

.solution-list span {
  margin-top: 4px;
  color: var(--muted);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(300px, 0.78fr);
  gap: clamp(28px, 6vw, 72px);
  padding: 72px clamp(20px, 7vw, 104px);
  color: var(--paper);
  background: var(--blue-deep);
}

.site-footer h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.18;
}

.site-footer p {
  color: rgba(255, 255, 255, 0.74);
}

.site-footer address {
  display: grid;
  gap: 14px;
  align-content: center;
  font-style: normal;
}

.site-footer address span {
  display: block;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.site-footer a {
  color: #a7e2ae;
  font-weight: 900;
}

@media (max-width: 1080px) {
  .position-grid,
  .business-grid,
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-card.large {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .metrics-band {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .site-header {
    min-height: 68px;
    padding: 10px 18px;
  }

  .brand {
    min-width: 0;
    gap: 10px;
  }

  .brand strong {
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .brand-logos {
    gap: 8px;
  }

  .brand-logo-zyf {
    height: 25px;
  }

  .brand-logo-zero {
    height: 36px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .language-switch {
    order: -1;
  }

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

  .site-nav a {
    padding: 12px;
  }

  .hero {
    min-height: 700px;
    padding-top: 118px;
  }

  .hero-bg {
    background-image: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.9) 48%, rgba(255,255,255,0.28) 80%), url("assets/hero-skyline-clean.jpg");
    background-position: center bottom;
    background-size: auto 54%;
  }

  .hero-strip {
    position: relative;
    right: auto;
    bottom: auto;
    left: auto;
    margin-top: 56px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(40, 55, 143, 0.18);
    border-radius: 8px;
  }

  .stat-row,
  .position-grid,
  .business-grid,
  .case-grid,
  .platform,
  .strategy,
  .cooperation,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .media-panel,
  .cooperation-media img {
    min-height: 0;
    height: auto;
  }

  .route {
    flex-wrap: wrap;
  }
}

@media (max-width: 560px) {
  .hero {
    min-height: 720px;
    padding-bottom: 58px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-actions {
    display: grid;
  }

  .section {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .metrics-band {
    grid-template-columns: 1fr;
  }

  .metrics-band div {
    min-height: 145px;
  }

  .case-card.large img,
  .case-card img {
    height: 230px;
  }

  .brand-logos {
    gap: 6px;
  }

  .brand-logo-zyf {
    height: 21px;
  }

  .brand-logo-zero {
    height: 30px;
  }
}