:root {
  --black: #f6f9fe;
  --black-2: #ffffff;
  --black-3: #eaf2fb;
  --yellow: #1f6ed4;
  --orange: #ff8a00;
  --white: #172033;
  --muted: #66758a;
  --line: #d8e3ef;
  --shadow: 0 20px 48px rgba(24, 52, 86, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--black);
  color: var(--white);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  max-width: 100vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.72));
  color: var(--white);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 8px 26px rgba(24, 52, 86, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  overflow: hidden;
  border: 1px solid rgba(31, 110, 212, 0.16);
  background: linear-gradient(135deg, #1f6ed4 0%, #0f4fa8 100%);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(31, 110, 212, 0.22);
}

.brand-mark::before {
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  content: "";
}

.brand-mark::after {
  position: absolute;
  right: 9px;
  bottom: 13px;
  width: 20px;
  height: 10px;
  border-bottom: 4px solid #ffb13b;
  border-left: 4px solid #ffb13b;
  content: "";
  transform: rotate(-45deg);
}

.brand-mark span {
  position: relative;
  z-index: 1;
  transform: translate(-4px, -1px);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  white-space: nowrap;
}

.brand-text strong {
  font-size: clamp(19px, 2vw, 28px);
  font-weight: 900;
}

.brand-text span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.nav {
  display: flex;
  gap: 30px;
  font-size: 14px;
  font-weight: 800;
}

.nav a {
  position: relative;
  padding: 8px 0;
}

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

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
}

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

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #eef5ff;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.9) 0%, rgba(246, 249, 254, 0.72) 40%, rgba(246, 249, 254, 0.08) 78%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, rgba(246, 249, 254, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 40px));
  margin-left: clamp(20px, 6vw, 86px);
  padding-top: 72px;
  color: var(--white);
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--yellow);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 1100px;
  margin-bottom: 22px;
  font-size: clamp(30px, 4.6vw, 62px);
  line-height: 1.06;
  white-space: nowrap;
}

.hero-lead {
  max-width: 660px;
  margin-bottom: 34px;
  color: #40516a;
  font-size: clamp(18px, 2.1vw, 22px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 900;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  background: var(--orange);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(255, 138, 0, 0.22);
}

.btn.secondary {
  border-color: var(--yellow);
  color: var(--yellow);
  background: rgba(255, 255, 255, 0.72);
}

.btn.wide {
  width: 100%;
}

.section {
  padding: 88px clamp(20px, 5vw, 72px);
}

.spotlight {
  display: grid;
  grid-template-columns: minmax(320px, 1.45fr) repeat(2, minmax(220px, 0.8fr));
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.spotlight article {
  min-width: 0;
  min-height: 310px;
  padding: 38px clamp(20px, 5vw, 52px);
  border-right: 1px solid var(--line);
  background: var(--black-2);
}

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

.spotlight-lead {
  background: linear-gradient(135deg, #ffffff 0%, #edf5ff 100%);
}

.spotlight h2,
.section-split h2,
.people-panel h2,
.contact-copy h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 3.8vw, 50px);
  line-height: 1.16;
}

.spotlight h3 {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.2;
}

.spotlight p:not(.eyebrow),
.section-split p,
.service-rows p,
.timeline p,
.people-copy p,
.contact-copy p,
.spotlight span {
  color: var(--muted);
}

.spotlight a {
  display: inline-block;
  margin-top: 20px;
  color: var(--yellow);
  font-weight: 900;
}

.section-split {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(28px, 6vw, 96px);
  align-items: start;
  margin-bottom: 48px;
}

.section-split.compact {
  margin-bottom: 34px;
}

.service-rows {
  border-top: 1px solid var(--line);
}

.service-rows article {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.service-rows span,
.timeline span {
  color: var(--yellow);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.service-rows h3 {
  margin-bottom: 8px;
  font-size: 28px;
  line-height: 1.25;
}

.process,
.people {
  background: var(--black-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.timeline article {
  min-height: 230px;
  padding: 32px 24px 24px 0;
  border-right: 1px solid var(--line);
}

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

.timeline h3 {
  margin: 26px 0 10px;
  font-size: 24px;
}

.people-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 96px);
}

.people-copy ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.people-copy li {
  padding: 18px;
  border-left: 4px solid var(--yellow);
  background: #f4f8fe;
  font-weight: 800;
}

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

.metrics div {
  padding: 34px clamp(20px, 4vw, 48px);
  border-right: 1px solid var(--line);
}

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

.metrics strong {
  display: block;
  margin-bottom: 6px;
  color: var(--yellow);
  font-size: 30px;
  line-height: 1.1;
}

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

.contact {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 430px);
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
  background: linear-gradient(135deg, #0f4fa8 0%, #1f6ed4 100%);
  color: #ffffff;
}

.contact .eyebrow {
  color: #ffffff;
}

.contact-copy p:not(.eyebrow) {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.contact-card {
  display: grid;
  gap: 18px;
  padding: 32px;
  background: #ffffff;
  color: var(--white);
  box-shadow: var(--shadow);
}

.contact-card div {
  display: grid;
  gap: 4px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(17, 17, 17, 0.28);
}

.contact-card span {
  color: rgba(17, 17, 17, 0.68);
  font-size: 13px;
}

.contact-card strong {
  font-size: 18px;
  line-height: 1.35;
}

.contact-card .btn.primary {
  background: var(--orange);
  color: #ffffff;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 5vw, 72px);
  background: #10243d;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-block;
    flex: 0 0 42px;
  }

  .nav {
    position: absolute;
    top: 100%;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    background: var(--black);
    box-shadow: var(--shadow);
  }

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

  .nav a {
    padding: 14px 10px;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .hero {
    min-height: 820px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(255, 255, 255, 0.92) 0%, rgba(245, 249, 255, 0.78) 64%, rgba(245, 249, 255, 0.42) 100%),
      linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(246, 249, 254, 0.82) 100%);
  }

  .spotlight,
  .section-split,
  .people-panel,
  .contact {
    grid-template-columns: 1fr;
  }

  .spotlight article {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .timeline,
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline article:nth-child(2),
  .metrics div:nth-child(2) {
    border-right: 0;
  }
}

@media (max-width: 640px) {
  .site-header {
    gap: 10px;
    padding: 14px 68px 14px 16px;
  }

  .brand {
    gap: 10px;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
    position: absolute;
    top: 15px;
    right: 16px;
  }

  .brand-mark {
    width: 44px;
    height: 44px;
  }

  .brand-mark span {
    font-size: 21px;
  }

  .brand-text strong {
    font-size: clamp(12px, 3vw, 14px);
  }

  .brand-text span {
    display: none;
  }

  .hero {
    min-height: 760px;
  }

  .hero-content {
    width: calc(100% - 36px);
    margin-left: 18px;
  }

  h1 {
    font-size: clamp(18px, 5vw, 24px);
  }

  .spotlight h2,
  .section-split h2,
  .people-panel h2,
  .contact-copy h2 {
    font-size: 28px;
    word-break: break-all;
  }

  .spotlight p,
  .section-split p,
  .service-rows p,
  .timeline p,
  .people-copy p {
    word-break: break-all;
  }

  .hero-lead {
    max-width: min(100%, 340px);
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .section {
    padding: 64px 18px;
  }

  .spotlight article {
    padding: 32px 18px;
  }

  .service-rows article {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .timeline,
  .metrics,
  .people-copy ul {
    grid-template-columns: 1fr;
  }

  .timeline article,
  .timeline article:nth-child(2),
  .metrics div,
  .metrics div:nth-child(2) {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .contact-card {
    padding: 24px;
  }

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