:root {
  --ink: #142033;
  --muted: #667589;
  --line: #dce5ef;
  --blue: #0e74bd;
  --blue-dark: #064f84;
  --green: #2b9b61;
  --bg: #f5f8fb;
  --white: #ffffff;
  --shadow: 0 18px 46px rgba(12, 38, 66, .16);
}

* {
  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(--white);
  line-height: 1.65;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid rgba(220, 229, 239, .86);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  min-width: 245px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: var(--white);
  font-weight: 800;
  letter-spacing: 0;
}

.brand-logo {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand strong,
.brand em {
  display: block;
  font-style: normal;
}

.brand strong {
  font-size: 18px;
  line-height: 1.25;
}

.brand em {
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  flex: 1;
  font-size: 15px;
  font-weight: 600;
}

.main-nav a {
  padding: 29px 0;
  border-bottom: 3px solid transparent;
}

.main-nav a:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.mobile-nav-phone,
.mobile-top-phone,
.mobile-contact-bar {
  display: none;
}

.header-phone {
  white-space: nowrap;
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue);
  font-weight: 700;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 10px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  background: #0a1727;
}

.hero-media img {
  height: 100%;
  object-fit: cover;
  filter: saturate(.95) contrast(1.04);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 20, 36, .9) 0%, rgba(3, 20, 36, .74) 37%, rgba(3, 20, 36, .18) 75%),
    linear-gradient(0deg, rgba(3, 20, 36, .78), rgba(3, 20, 36, .08) 42%);
}

.hero-content {
  position: relative;
  padding: 115px 0 90px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #1d87ce;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #78d7ff;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: 62px;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 640px;
  margin-bottom: 34px;
  font-size: 20px;
  color: rgba(238, 248, 255, .92);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  height: 48px;
  border-radius: 8px;
  font-weight: 800;
}

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

.btn.secondary {
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .4);
  color: var(--white);
}

.hero-stats {
  width: min(720px, 100%);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 58px;
  background: rgba(255, 255, 255, .2);
  border: 1px solid rgba(255, 255, 255, .2);
}

.hero-stats span {
  padding: 20px;
  background: rgba(6, 27, 45, .56);
}

.hero-stats strong {
  display: block;
  margin-bottom: 3px;
  font-size: 30px;
  line-height: 1;
  color: #87dcff;
}

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

.search-inner {
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.search-inner strong {
  padding-right: 16px;
  border-right: 1px solid rgba(255, 255, 255, .34);
}

.search-inner a {
  color: rgba(255, 255, 255, .86);
}

.section {
  padding: 88px 0;
}

.section:nth-of-type(odd) {
  background: var(--bg);
}

.section-head {
  text-align: center;
  margin-bottom: 42px;
}

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

.section-head h2,
.about h2,
.contact h2 {
  margin-bottom: 14px;
  font-size: 38px;
  line-height: 1.25;
  letter-spacing: 0;
}

.section-head p:last-child,
.about p,
.contact p {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  color: var(--muted);
}

.align-left p:last-child {
  margin-left: 0;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card,
.case-showcase article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 34px rgba(16, 52, 85, .08);
}

.product-card img {
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center center;
  padding: 10px;
  background: #f2f7fb;
}

.product-card div,
.case-showcase article p,
.case-showcase article h3 {
  padding-left: 22px;
  padding-right: 22px;
}

.product-card div {
  padding-top: 22px;
  padding-bottom: 24px;
}

.product-card h3,
.case-showcase h3,
.advantage-list h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.product-card p,
.case-showcase p,
.advantage-list p,
.news-list span {
  color: var(--muted);
}

.product-meta {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.product-meta li {
  position: relative;
  padding-left: 18px;
  color: #44566d;
  font-size: 14px;
}

.product-meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--green);
}

.split {
  display: grid;
  grid-template-columns: .9fr 1.25fr;
  gap: 56px;
  align-items: start;
}

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

.advantage-list article {
  min-height: 190px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.advantage-list span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--blue);
  font-size: 28px;
  font-weight: 900;
}

.case-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-showcase img {
  height: 300px;
  object-fit: cover;
}

.case-showcase h3 {
  padding-top: 22px;
}

.case-showcase p {
  padding-bottom: 24px;
}

.about {
  color: var(--white);
  background: linear-gradient(120deg, #06243d 0%, #083b64 52%, #0b6b65 100%);
}

.about .eyebrow,
.contact .eyebrow {
  color: #8fe4ff;
}

.about p {
  margin-left: 0;
  color: rgba(237, 249, 255, .9);
}

.about-wrap {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 70px;
  align-items: center;
}

.check-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.check-list li {
  padding-left: 24px;
  position: relative;
  color: rgba(255, 255, 255, .9);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: #68d391;
}

.about-panel {
  padding: 36px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
}

.about-panel strong,
.about-panel span {
  display: block;
}

.about-panel strong {
  margin-bottom: 12px;
  font-size: 34px;
}

.about-panel span {
  color: rgba(255, 255, 255, .84);
}

.news-list {
  display: grid;
  gap: 14px;
}

.news-list a {
  display: grid;
  grid-template-columns: 132px 1fr 1.2fr;
  gap: 24px;
  align-items: center;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.news-list time {
  color: var(--blue);
  font-weight: 800;
}

.contact {
  padding: 78px 0;
  color: var(--white);
  background: #06243d;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 58px;
  align-items: center;
}

.contact p {
  margin-left: 0;
  color: rgba(237, 249, 255, .9);
}

.contact-card {
  display: grid;
  gap: 14px;
  padding: 30px;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
}

.contact-card a {
  color: var(--blue);
  font-size: 22px;
  font-weight: 900;
}

.site-footer {
  background: #031322;
  color: rgba(255, 255, 255, .72);
}

.footer-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 980px) {
  .header-inner {
    min-height: 72px;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    display: none;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    padding: 10px 20px 18px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
  }

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

  .main-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav-phone {
    display: block;
    grid-column: 1 / -1;
    padding: 13px 14px;
    border: 0;
    border-radius: 8px;
    background: #eef7ff;
    color: var(--blue);
    font-weight: 800;
    text-align: center;
  }

  .header-phone {
    display: none;
  }

  .mobile-top-phone {
    display: block;
    padding: 8px 14px 10px;
    border-top: 1px solid var(--line);
    background: #eef7ff;
    color: var(--blue);
    font-size: 15px;
    font-weight: 800;
    line-height: 1.35;
    text-align: center;
  }

  h1 {
    font-size: 46px;
  }

  .hero {
    min-height: 660px;
  }

  .product-grid,
  .split,
  .about-wrap,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .about-wrap,
  .contact-inner,
  .split {
    gap: 32px;
  }

  .news-list a {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .brand {
    min-width: 0;
  }

  .brand em {
    display: none;
  }

  .brand strong {
    font-size: 16px;
  }

  .hero {
    min-height: 620px;
  }

  .hero-content {
    padding: 64px 0 58px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    margin-top: 34px;
  }

  .section {
    padding: 62px 0;
  }

  .section-head h2,
  .about h2,
  .contact h2 {
    font-size: 30px;
  }

  .search-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
    gap: 7px;
  }

  .search-inner strong {
    border-right: 0;
    padding-right: 0;
  }

  .advantage-list,
  .case-showcase {
    grid-template-columns: 1fr;
  }

  .case-showcase img {
    height: 260px;
  }

  .about-panel strong {
    font-size: 28px;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    padding: 18px 0 86px;
  }

  .mobile-contact-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    border-top: 1px solid rgba(220, 229, 239, .95);
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 -10px 28px rgba(6, 31, 52, .14);
    backdrop-filter: blur(12px);
  }

  .mobile-contact-bar a,
  .mobile-contact-bar span {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 800;
    text-align: center;
  }

  .mobile-contact-bar a {
    background: var(--blue);
    color: var(--white);
  }

  .mobile-contact-bar span {
    border: 1px solid var(--line);
    background: #f7fbff;
    color: var(--ink);
  }
}