:root {
  --ink: #14213d;
  --muted: #667085;
  --line: #dfe7ef;
  --paper: #f6f8fb;
  --white: #ffffff;
  --blue: #2454d6;
  --blue-dark: #101b3f;
  --teal: #14a6a1;
  --coral: #ff6b5f;
  --amber: #ffb84d;
  --green: #2f8f6f;
  --shadow: 0 18px 55px rgba(20, 33, 61, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: var(--white);
  transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.site-header.scrolled,
.site-header.open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 35px rgba(8, 32, 51, 0.12);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 176px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--teal));
  font-weight: 800;
}

.site-header.scrolled .brand-mark,
.site-header.open .brand-mark {
  border-color: transparent;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
}

.brand small {
  margin-top: 2px;
  font-size: 11px;
  color: currentColor;
  opacity: 0.72;
}

.nav {
  display: flex;
  justify-content: center;
  gap: clamp(18px, 3vw, 38px);
  font-size: 14px;
}

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

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

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

.header-action,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid currentColor;
  border-radius: 6px;
  font-weight: 700;
  white-space: nowrap;
}

.header-action {
  font-size: 14px;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid currentColor;
  border-radius: 6px;
  color: inherit;
  background: transparent;
}

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

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  color: var(--white);
  background: #101b3f;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(16, 27, 63, 0.92) 0%, rgba(16, 27, 63, 0.76) 42%, rgba(16, 27, 63, 0.28) 76%),
    linear-gradient(180deg, rgba(16, 27, 63, 0.32) 0%, rgba(16, 27, 63, 0.08) 58%, rgba(246, 248, 251, 1) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 178px 0 90px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  font-weight: 850;
}

.hero-copy {
  max-width: 620px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button.primary {
  border-color: var(--coral);
  color: var(--white);
  background: var(--coral);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 180px));
  gap: 18px;
  margin: 72px 0 0;
}

.hero-metrics div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(16, 27, 63, 0.48);
  backdrop-filter: blur(10px);
}

.hero-metrics dt {
  font-size: 34px;
  font-weight: 850;
}

.hero-metrics dd {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

.trust-strip {
  display: grid;
  grid-template-columns: auto repeat(5, 1fr);
  gap: 1px;
  width: min(1120px, calc(100% - 40px));
  margin: -36px auto 0;
  position: relative;
  z-index: 3;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.trust-strip span,
.trust-strip strong {
  min-height: 72px;
  display: grid;
  place-items: center;
  padding: 12px 18px;
  background: var(--white);
}

.trust-strip span {
  color: var(--muted);
  font-size: 13px;
}

.trust-strip strong {
  font-size: 16px;
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 104px 0;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.align-left {
  margin: 0;
  text-align: left;
}

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

.section h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
}

.section-heading p:not(.eyebrow),
.case-copy p,
.contact p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.service-card {
  min-height: 320px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 36px rgba(20, 44, 63, 0.06);
}

.icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 6px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--teal));
  font-weight: 800;
}

.service-card h3 {
  margin: 24px 0 12px;
  font-size: 21px;
}

.service-card p,
.service-card li {
  color: var(--muted);
  line-height: 1.75;
}

.service-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.band {
  width: 100%;
  max-width: none;
  padding-right: max(20px, calc((100vw - 1120px) / 2));
  padding-left: max(20px, calc((100vw - 1120px) / 2));
  background: #eaf1f8;
}

.industry-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
}

.industry-panel {
  padding: 32px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue-dark);
}

.industry-panel h3 {
  margin: 0 0 20px;
  font-size: 24px;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.tab {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 6px;
  color: var(--white);
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.tab.active {
  border-color: var(--coral);
  background: var(--coral);
}

.tab-copy {
  min-height: 180px;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.tab-copy h4 {
  margin: 0 0 12px;
  font-size: 26px;
}

.tab-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.85;
}

.process {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.process div {
  min-height: 170px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.process span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--teal);
  font-weight: 800;
}

.process strong {
  display: block;
  margin: 18px 0 8px;
  font-size: 20px;
}

.process p,
.risk-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.split {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 56px;
  align-items: start;
}

.risk-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.risk-list article {
  min-height: 152px;
  padding: 26px;
  border-left: 4px solid var(--green);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 32px rgba(20, 44, 63, 0.06);
}

.risk-list strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

.cases {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-copy h2,
.contact h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
}

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

.case-stats div {
  display: grid;
  min-height: 190px;
  align-content: center;
  padding: 24px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue);
}

.case-stats div:nth-child(2) {
  background: var(--teal);
}

.case-stats div:nth-child(3) {
  background: var(--green);
}

.insights {
  padding-top: 32px;
}

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

.insight-card {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 36px rgba(20, 33, 61, 0.06);
}

.insight-card p {
  margin: 0 0 22px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.insight-card h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.35;
}

.insight-card span {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.case-stats strong {
  display: block;
  font-size: clamp(32px, 5vw, 52px);
}

.case-stats span {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.5;
}

.contact {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-simple {
  grid-template-columns: 1fr;
  max-width: 860px;
}

.contact-points {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.contact-points div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.contact-points strong,
.contact-points span {
  display: block;
}

.contact-points strong {
  margin-bottom: 6px;
  font-size: 16px;
}

.contact-points span {
  color: var(--muted);
  line-height: 1.6;
}

.contact-points a {
  color: var(--blue);
  font-weight: 800;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.72);
  background: #101b3f;
}

.site-footer strong {
  color: var(--white);
}

.site-footer p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--white);
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .nav {
    position: fixed;
    top: 80px;
    right: 20px;
    left: 20px;
    display: none;
    grid-column: 1 / -1;
    padding: 18px;
    border-radius: 8px;
    color: var(--ink);
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-header.open .nav {
    display: grid;
  }

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

  .menu-button {
    display: inline-block;
  }

  .service-grid,
  .industry-layout,
  .split,
  .cases,
  .contact {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .risk-list,
  .case-stats,
  .insight-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .trust-strip span {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 14px 16px;
    gap: 10px;
  }

  .brand {
    min-width: 0;
  }

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

  .hero {
    min-height: 860px;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(16, 27, 63, 0.94) 0%, rgba(16, 27, 63, 0.76) 58%, rgba(246, 248, 251, 1) 100%),
      linear-gradient(90deg, rgba(16, 27, 63, 0.82), rgba(16, 27, 63, 0.36));
  }

  .hero-content {
    width: calc(100% - 32px);
    padding-top: 128px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-metrics,
  .service-grid,
  .risk-list,
  .case-stats,
  .insight-grid,
  .process,
  .trust-strip {
    grid-template-columns: 1fr;
  }

  .section {
    width: calc(100% - 32px);
    padding: 72px 0;
  }

  .band {
    width: 100%;
    padding-right: 16px;
    padding-left: 16px;
  }

  .tabs {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: block;
  }

  .footer-links {
    margin: 20px 0;
  }
}