:root {
  --ink: #10243f;
  --muted: #5d6b7d;
  --line: #dbe4ee;
  --brand: #0b4f8a;
  --brand-dark: #052e5b;
  --accent: #16a6c9;
  --warm: #f2b84b;
  --paper: #ffffff;
  --soft: #f5f8fb;
  --soft-blue: #e8f4f8;
  --shadow: 0 20px 60px rgba(16, 36, 63, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--paper);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(219, 228, 238, 0.85);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand img {
  width: 190px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #243a58;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 6px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--brand);
  background: var(--soft-blue);
  outline: none;
}

.nav-admin {
  color: #ffffff !important;
  background: var(--brand) !important;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.92fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: calc(100vh - 76px);
  padding: clamp(40px, 7vw, 86px) clamp(18px, 5vw, 72px) 56px;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(232, 244, 248, 0.92), rgba(255, 255, 255, 0.96) 52%),
    radial-gradient(circle at 82% 18%, rgba(242, 184, 75, 0.18), transparent 30%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-text {
  max-width: 660px;
  margin-bottom: 28px;
  color: #3e5067;
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--brand);
  border-radius: 6px;
  font-weight: 800;
}

.btn.primary {
  color: #ffffff;
  background: var(--brand);
}

.btn.secondary {
  color: var(--brand);
  background: #ffffff;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 760px;
  margin: 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid rgba(11, 79, 138, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.hero-stats dt {
  margin-bottom: 4px;
  color: var(--brand-dark);
  font-size: 20px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-media {
  position: relative;
  min-height: 520px;
}

.hero-media::before {
  position: absolute;
  inset: 56px 0 0 18%;
  border-radius: 48% 52% 42% 58%;
  background: linear-gradient(135deg, #dff2f7, #ffffff);
  box-shadow: var(--shadow);
  content: "";
}

.hero-product {
  position: absolute;
  right: -3vw;
  bottom: 0;
  width: min(760px, 110%);
  filter: drop-shadow(0 28px 28px rgba(16, 36, 63, 0.16));
}

.section {
  padding: 86px clamp(18px, 5vw, 72px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  max-width: 1180px;
  margin: 0 auto 34px;
}

.intro {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  background: var(--brand-dark);
  color: #ffffff;
}

.intro .section-heading,
.intro .intro-text {
  max-width: none;
  margin: 0;
}

.intro .eyebrow {
  color: #8bd8e8;
}

.intro-text {
  display: grid;
  gap: 18px;
  color: #dbe9f4;
  font-size: 18px;
}

.intro-text p {
  margin: 0;
}

.products {
  background: #ffffff;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
}

.product-card {
  min-height: 430px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 34px rgba(16, 36, 63, 0.07);
}

.product-card img {
  width: 100%;
  height: 240px;
  margin-bottom: 20px;
  object-fit: contain;
}

.product-card p,
.advantage-list p,
.steps span,
.contact-copy p {
  color: var(--muted);
}

.advantages {
  background: var(--soft);
}

.advantage-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: 1180px;
  margin: 0 auto;
  background: var(--line);
  border: 1px solid var(--line);
}

.advantage-list article {
  min-height: 260px;
  padding: 30px 24px;
  background: #ffffff;
}

.advantage-list span {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 900;
}

.process {
  background: #ffffff;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.steps li {
  position: relative;
  min-height: 190px;
  padding: 28px 24px;
  border-radius: 8px;
  background: linear-gradient(180deg, #f7fbfd, #ffffff);
  border: 1px solid var(--line);
}

.steps li::before {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 22px;
  border-radius: 50%;
  color: #ffffff;
  background: var(--brand);
  font-weight: 900;
  content: counter(list-item);
}

.steps strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.steps span {
  display: block;
}

.contact {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 480px);
  gap: 36px;
  align-items: center;
  padding: 78px clamp(18px, 5vw, 72px);
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  color: #ffffff;
}

.contact-copy {
  max-width: 720px;
}

.contact-copy .eyebrow,
.contact-copy p {
  color: #c9edf5;
}

.contact-panel {
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
}

.contact-panel p {
  margin-bottom: 12px;
}

.contact-panel p:last-child {
  margin-bottom: 0;
}

.contact-panel a {
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.72);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: #607086;
  background: #071f3a;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #d8ecf7;
}

.site-footer span {
  margin-left: 8px;
}

@media (max-width: 980px) {
  .site-nav {
    position: fixed;
    inset: 76px 14px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--shadow);
  }

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

  .nav-toggle {
    display: block;
  }

  .hero,
  .intro,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-media {
    min-height: 390px;
  }

  .hero-product {
    right: 0;
    width: min(680px, 104%);
  }

  .section-heading {
    display: block;
  }

  .product-grid,
  .advantage-list,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .brand img {
    width: 150px;
  }

  .hero-stats,
  .product-grid,
  .advantage-list,
  .steps {
    grid-template-columns: 1fr;
  }

  .hero-media {
    min-height: 300px;
  }

  .hero-media::before {
    inset: 40px 0 0 10%;
  }

  .product-card {
    min-height: auto;
  }

  .contact-panel {
    padding: 22px;
  }

  .site-footer span {
    display: block;
    margin: 4px 0 0;
  }
}