:root {
  --bg: #ffffff;
  --surface: #f7f8fa;
  --surface-strong: #eef1f5;
  --text: #101318;
  --muted: #5d6572;
  --quiet: #8d95a1;
  --line: #d9dee6;
  --line-soft: #edf0f4;
  --blue: #071f49;
  --blue-hover: #0b2b61;
  --gold: #b9975b;
  --shadow: 0 22px 60px rgba(20, 28, 42, 0.12);
  --max: 1180px;
  --radius: 8px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
}

body::selection {
  background: rgba(7, 31, 73, 0.12);
}

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

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

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

h1,
h2,
h3,
.brand,
.footer-brand {
  letter-spacing: 0;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}

h1 {
  font-size: clamp(3rem, 5.8vw, 5.45rem);
  line-height: 0.98;
  max-width: 840px;
}

h2 {
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.03;
}

h3 {
  font-size: 1.02rem;
  font-weight: 620;
  line-height: 1.25;
}

html[lang="zh-CN"] body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
}

html[lang="zh-CN"] h1,
html[lang="zh-CN"] h2 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-weight: 600;
  line-height: 1.12;
}

p {
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 72px;
  padding: 0 clamp(22px, 5vw, 72px);
  border-bottom: 1px solid rgba(217, 222, 230, 0.84);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(24px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 680;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 740;
  letter-spacing: 0.06em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 40px);
  color: #20242b;
  font-size: 0.95rem;
}

.site-nav a {
  position: relative;
  padding: 27px 0 24px;
  color: #242a34;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 1px;
  background: var(--blue);
  content: "";
  opacity: 0;
  transform: scaleX(0.3);
  transition: opacity 180ms ease, transform 180ms ease;
}

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

.site-nav .language-switch {
  margin-left: 2px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
  color: var(--blue);
  font-weight: 700;
}

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

.nav-toggle span {
  display: block;
  width: 17px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
}

.section,
.band,
.contact-panel,
.page-hero,
.legal-page {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(400px, 0.82fr);
  min-height: max(560px, calc(100vh - 180px));
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(56px, 8vw, 104px) clamp(22px, 7vw, 96px);
}

.lead {
  margin-top: 22px;
  color: #3d4653;
  font-size: clamp(1.2rem, 2vw, 1.62rem);
  line-height: 1.35;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 610;
  line-height: 1;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 14px 36px rgba(7, 31, 73, 0.18);
}

.button.primary:hover {
  background: var(--blue-hover);
}

.button.secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
}

.button.secondary:hover {
  border-color: #bbc3cf;
}

.hero-media {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  border-left: 1px solid var(--line);
  background: var(--surface);
}

.hero-media::after {
  position: absolute;
  inset: 0 auto 0 0;
  width: 28%;
  background: linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, 0) 100%);
  content: "";
  pointer-events: none;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 57% 50%;
}

.section {
  padding: clamp(72px, 10vw, 128px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.section.compact {
  padding-top: clamp(62px, 8vw, 96px);
}

.section-heading {
  display: grid;
  gap: 18px;
  max-width: 730px;
  margin-bottom: clamp(42px, 6vw, 72px);
}

.section-heading.split {
  grid-template-columns: minmax(0, 0.92fr) minmax(280px, 0.65fr);
  align-items: end;
  max-width: none;
}

.section-heading p,
.text-stack p,
.content-columns p {
  font-size: 1.04rem;
}

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

.service-strip article {
  min-height: 208px;
  padding: 32px 28px;
  border-right: 1px solid var(--line);
}

.service-strip article:last-child {
  border-right: 0;
}

.service-strip span,
.services-list span,
.value-list span {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 680;
}

.service-strip h3 {
  margin-bottom: 12px;
}

.service-strip p {
  font-size: 0.92rem;
}

.band {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

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

.metric-row div {
  padding: 28px 22px;
  text-align: center;
  border-right: 1px solid var(--line);
}

.metric-row div:last-child {
  border-right: 0;
}

.metric-row strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 3vw, 2.65rem);
  font-weight: 500;
  line-height: 1;
}

.metric-row span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 0.7fr);
  gap: clamp(44px, 8vw, 108px);
}

.subtle-label {
  margin-bottom: 18px;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 720;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.text-stack {
  display: grid;
  gap: 20px;
  align-content: start;
}

.text-link {
  width: fit-content;
  margin-top: 12px;
  border-bottom: 1px solid currentColor;
  color: var(--blue);
  font-weight: 650;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.person-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.person-card h3,
.profile-list h2 {
  margin-top: 22px;
}

.person-card p,
.role {
  margin-top: 7px;
  color: var(--text);
  font-weight: 590;
}

.person-card span,
.profile-list span {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.avatar {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 25%, #fff 0, rgba(255, 255, 255, 0) 42%),
    linear-gradient(145deg, #f8f9fb, #e9edf3);
  color: var(--blue);
  font-weight: 720;
}

.avatar.large {
  width: 104px;
  height: 104px;
  flex: 0 0 104px;
  font-size: 1.2rem;
}

.contact-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: clamp(64px, 9vw, 110px);
  margin-bottom: clamp(64px, 9vw, 110px);
  padding: clamp(38px, 6vw, 64px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(247, 248, 250, 0.94), rgba(255, 255, 255, 0.98)),
    var(--surface);
}

.contact-panel h2 {
  max-width: 720px;
  font-size: clamp(2rem, 4vw, 3.7rem);
}

.contact-panel p {
  max-width: 580px;
  margin-top: 18px;
}

.page-hero {
  padding: clamp(86px, 13vw, 150px) 0 clamp(64px, 9vw, 92px);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  max-width: 1000px;
}

.page-hero p {
  max-width: 720px;
  margin-top: 26px;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.values-section {
  padding-top: clamp(56px, 8vw, 96px);
}

.value-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.value-list article {
  padding: 34px 30px 0 0;
  border-right: 1px solid var(--line);
}

.value-list article + article {
  padding-left: 30px;
}

.value-list article:last-child {
  border-right: 0;
}

.value-list h3 {
  margin-bottom: 12px;
}

.text-only h2 {
  max-width: 760px;
}

.content-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(28px, 6vw, 76px);
  margin-top: 36px;
}

.services-list {
  display: grid;
  padding-top: clamp(52px, 8vw, 92px);
}

.services-list article {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 32px;
  padding: 42px 0;
  border-bottom: 1px solid var(--line);
}

.services-list article:first-child {
  border-top: 1px solid var(--line);
}

.services-list h2 {
  max-width: 780px;
  font-size: clamp(1.75rem, 3vw, 3.1rem);
}

.services-list p {
  max-width: 720px;
  margin-top: 16px;
}

.profile-list {
  display: grid;
  gap: 0;
}

.profile-list article {
  display: flex;
  gap: 32px;
  padding: 38px 0;
  border-top: 1px solid var(--line);
}

.profile-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.profile-list h2 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 620;
}

.profile-list p:not(.role) {
  max-width: 720px;
  margin-top: 14px;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(360px, 0.9fr);
  gap: clamp(42px, 8vw, 100px);
}

.contact-details {
  align-self: start;
}

.contact-details h2 {
  margin-bottom: 28px;
}

dl {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

dt,
dd {
  margin: 0;
}

dl div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

dt {
  color: var(--quiet);
  font-size: 0.86rem;
}

dd a {
  color: var(--blue);
  font-weight: 620;
}

.fine-print {
  margin-top: 28px;
  font-size: 0.92rem;
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 620;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 0.98rem;
  padding: 11px 12px;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(7, 31, 73, 0.12);
}

.form-status {
  min-height: 22px;
  font-size: 0.9rem;
}

.legal-page {
  max-width: 820px;
  padding: clamp(76px, 12vw, 130px) 0;
}

.legal-page h1 {
  font-size: clamp(3rem, 7vw, 5.8rem);
}

.legal-page .updated {
  margin-top: 18px;
  color: var(--quiet);
}

.legal-page h2 {
  margin-top: 48px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.25rem;
  font-weight: 680;
}

.legal-page p {
  margin-top: 16px;
}

.legal-page a {
  color: var(--blue);
  font-weight: 650;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
  gap: 36px;
  padding: 38px clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin-top: 8px;
  font-size: 0.88rem;
}

.site-footer nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer nav a:hover {
  color: var(--blue);
}

.copyright {
  justify-self: end;
  text-align: right;
}

.not-found {
  display: grid;
  align-content: center;
  gap: 22px;
  min-height: 100vh;
  width: min(760px, calc(100% - 44px));
  margin: 0 auto;
}

.not-found h1 {
  font-size: clamp(3rem, 8vw, 6rem);
}

.not-found .button {
  width: fit-content;
}

@media (max-width: 980px) {
  .section-grid,
  .section-heading.split,
  .two-column,
  .contact-layout,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .section-grid {
    min-height: auto;
  }

  .hero-copy {
    padding-top: 86px;
    padding-bottom: 70px;
  }

  .hero-media {
    min-height: 430px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .service-strip,
  .team-grid,
  .metric-row,
  .value-list,
  .content-columns {
    grid-template-columns: 1fr 1fr;
  }

  .service-strip article:nth-child(2n),
  .metric-row div:nth-child(2n),
  .value-list article:nth-child(2n) {
    border-right: 0;
  }

  .value-list article {
    padding-left: 0;
    padding-bottom: 28px;
  }

  .value-list article + article {
    padding-left: 30px;
  }

  .site-footer {
    align-items: start;
  }

  .copyright {
    justify-self: start;
    text-align: left;
  }
}

@media (max-width: 720px) {
  h1 {
    font-size: clamp(2.55rem, 11vw, 3.3rem);
  }

  .site-header {
    min-height: 66px;
    padding: 0 18px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 12px;
    left: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 13px 12px;
    border-radius: 6px;
  }

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

  .site-nav a.active,
  .site-nav a:hover {
    background: var(--surface);
  }

  .site-nav .language-switch {
    margin-top: 8px;
    margin-left: 0;
    padding-left: 12px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section,
  .band,
  .contact-panel,
  .page-hero,
  .legal-page {
    width: min(100% - 32px, var(--max));
  }

  .hero-copy {
    padding: 48px 20px 42px;
  }

  .hero-media {
    min-height: 230px;
  }

  .lead {
    font-size: 1.1rem;
  }

  .button {
    width: 100%;
  }

  .service-strip,
  .team-grid,
  .metric-row,
  .value-list,
  .content-columns {
    grid-template-columns: 1fr;
  }

  .service-strip article,
  .metric-row div,
  .value-list article,
  .value-list article + article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-left: 0;
  }

  .service-strip article:last-child,
  .metric-row div:last-child,
  .value-list article:last-child {
    border-bottom: 0;
  }

  .services-list article {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .profile-list article {
    display: grid;
  }

  .contact-panel {
    align-items: stretch;
    padding: 28px;
  }

  dl div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .contact-form {
    padding: 22px;
  }

  .site-footer nav {
    flex-wrap: wrap;
  }
}