:root {
  --blue: #3467ff;
  --blue-dark: #17306f;
  --cyan: #1fb7c9;
  --green: #31b579;
  --ink: #172033;
  --muted: #62708a;
  --line: #dce5f3;
  --surface: #f6f9fe;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(28, 55, 112, 0.12);
}

* {
  box-sizing: border-box;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  width: min(1180px, calc(100% - 36px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 260px;
}

.brand img {
  width: 46px;
  height: 46px;
}

.brand strong {
  display: block;
  font-size: 17px;
  line-height: 1.25;
}

.brand span {
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-links a {
  padding: 10px 13px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--blue-dark);
  background: #eef4ff;
}

.lang-switch {
  display: flex;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.lang-switch button {
  border: 0;
  border-radius: 6px;
  padding: 7px 10px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.lang-switch button.active {
  color: var(--white);
  background: var(--blue);
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(110deg, rgba(23, 48, 111, 0.96), rgba(52, 103, 255, 0.74)),
    url("logo.png") right 9% center / 360px no-repeat;
  color: var(--white);
}

.hero-inner {
  width: min(1180px, calc(100% - 36px));
  min-height: 560px;
  margin: 0 auto;
  padding: 92px 0 86px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 52px;
  align-items: center;
}

.eyebrow {
  color: #a6eff4;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 24px;
  max-width: 760px;
  font-size: clamp(40px, 6vw, 70px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 20px;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: var(--blue-dark);
  background: var(--white);
}

.section-head .button.primary,
.page-title + .section .button.primary {
  color: var(--white);
  background: var(--blue);
}

.button.secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.hero-panel {
  background: rgba(255, 255, 255, 0.11);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero-panel img {
  width: 82px;
  height: 82px;
  margin-bottom: 20px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.stat {
  min-height: 112px;
  padding: 18px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.13);
}

.stat strong {
  display: block;
  margin-bottom: 6px;
  font-size: 24px;
}

.section {
  padding: 82px 0;
}

.section.alt {
  background: var(--surface);
}

.container {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 34px;
}

.section-head h2,
.page-title h1 {
  margin-bottom: 12px;
  color: var(--blue-dark);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.16;
}

.section-head p,
.page-title p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 30px rgba(28, 55, 112, 0.06);
}

.card h3 {
  margin-bottom: 10px;
  color: var(--blue-dark);
  font-size: 21px;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.icon {
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  font-weight: 800;
}

.process {
  display: grid;
  grid-template-columns: repeat(7, minmax(120px, 1fr));
  gap: 12px;
}

.step {
  padding: 18px;
  border-top: 4px solid var(--cyan);
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(28, 55, 112, 0.06);
}

.step strong {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: start;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  padding: 16px 18px;
  border-left: 4px solid var(--green);
  background: var(--white);
  border-radius: 8px;
  color: var(--muted);
}

.page-title {
  padding: 74px 0 46px;
  background: var(--surface);
}

.contact-band {
  color: var(--white);
  background: var(--blue-dark);
}

.contact-band .container {
  padding: 42px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.contact-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.contact-items {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--white);
  font-weight: 700;
}

.form-shell {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 34px;
  align-items: start;
}

.form-shell aside img {
  width: 92px;
  height: 92px;
  margin-bottom: 18px;
}

.form-shell aside .contact-items {
  margin-top: 18px;
  color: var(--blue-dark);
}

.form {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field.full {
  grid-column: 1 / -1;
}

label {
  color: var(--blue-dark);
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
  background: #fbfdff;
}

textarea {
  min-height: 132px;
  resize: vertical;
}

.submit {
  margin-top: 22px;
  border: 0;
  color: var(--white);
  background: var(--blue);
  cursor: pointer;
}

.form-message {
  margin-top: 14px;
  color: var(--green);
  font-weight: 700;
}

.site-footer {
  padding: 34px 0;
  color: rgba(255, 255, 255, 0.78);
  background: #10182a;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 980px) {
  .nav {
    flex-wrap: wrap;
    padding: 14px 0;
  }

  .brand {
    min-width: auto;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .hero-inner,
  .split,
  .form-shell {
    grid-template-columns: 1fr;
  }

  .grid.three,
  .grid.two,
  .grid.four {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 620px) {
  .grid.three,
  .grid.two,
  .grid.four,
  .field-grid,
  .process {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding: 64px 0;
  }

  .section {
    padding: 58px 0;
  }

  .section-head,
  .contact-band .container,
  .site-footer .container {
    display: block;
  }

  .contact-items {
    margin-top: 18px;
  }
}