:root {
  --ink: #10201f;
  --muted: #5c6b69;
  --deep: #082523;
  --deep-2: #314f4c;
  --amber: #e2a02f;
  --amber-2: #f0b44e;
  --paper: #f4f7f7;
  --line: #d8e1df;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(14, 38, 36, 0.16);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

button,
input,
textarea {
  font: inherit;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
  padding: 0 72px;
  color: #edf7f4;
  background: rgba(54, 82, 79, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 320px;
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

.brand-logo {
  display: block;
  width: 320px;
  height: 64px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: #10201f;
  background: var(--amber);
  font-size: 18px;
  font-weight: 900;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  white-space: nowrap;
}

.site-nav a {
  opacity: 0.92;
}

.site-nav a:hover {
  opacity: 1;
}

.nav-button,
.button,
.quote-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  padding: 0 22px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.nav-button,
.button.primary,
.quote-form button {
  color: #101a18;
  background: var(--amber);
}

.button.secondary {
  color: #f7fffc;
  border: 1px solid rgba(255, 255, 255, 0.82);
  background: transparent;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: #ffffff;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 560px);
  gap: 80px;
  min-height: 612px;
  padding: 86px 72px 108px;
  color: #f7fffc;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(7, 31, 30, 0.98) 0%, rgba(9, 38, 36, 0.9) 49%, rgba(9, 38, 36, 0.36) 100%),
    linear-gradient(135deg, #0b302e 0%, #365b57 56%, #9aa7a7 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 86px;
  background: linear-gradient(180deg, rgba(244, 247, 247, 0), var(--paper));
  pointer-events: none;
}

.hero-copy,
.hero-media {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 18px;
  color: #ffffff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.3;
  text-transform: uppercase;
}

.eyebrow.dark {
  color: #986417;
}

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

h1 {
  max-width: 700px;
  font-size: 62px;
  line-height: 1.03;
  font-weight: 900;
}

h1 span {
  display: block;
}

h2 {
  font-size: 38px;
  line-height: 1.16;
  font-weight: 900;
}

h3 {
  font-size: 22px;
  line-height: 1.25;
  font-weight: 900;
}

p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.58;
}

.hero-lead {
  max-width: 650px;
  margin-top: 24px;
  color: #f2fbf8;
  font-size: 20px;
}

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

.hero-media {
  align-self: center;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 34px 90px rgba(2, 17, 16, 0.42);
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0) 42%, rgba(9, 24, 24, 0.66)),
    linear-gradient(90deg, rgba(4, 19, 18, 0.22), rgba(255, 255, 255, 0));
}

.hero-media img {
  width: 100%;
  height: 386px;
  object-fit: cover;
}

.metrics {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1296px;
  margin: -64px auto 0;
  padding: 0 0 40px;
}

.metrics article {
  min-height: 130px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.metrics strong {
  display: block;
  margin-bottom: 12px;
  color: #063f3c;
  font-size: 30px;
  line-height: 1;
}

.metrics span {
  display: block;
  color: #5a6b68;
  font-size: 15px;
  line-height: 1.45;
}

.section {
  padding: 78px 72px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 0.9fr);
  gap: 44px;
  max-width: 1296px;
  margin: 0 auto 34px;
}

.section-heading.compact {
  display: block;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading p:last-child {
  align-self: end;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1296px;
  margin: 0 auto;
}

.product-card {
  position: relative;
  min-height: 214px;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.product-card::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 168px;
  height: 102px;
  background:
    repeating-linear-gradient(125deg, transparent 0 16px, rgba(14, 64, 61, 0.18) 17px 22px),
    linear-gradient(135deg, rgba(226, 160, 47, 0.18), rgba(255, 255, 255, 0));
  transform: skewX(-8deg);
}

.card-index {
  display: inline-block;
  margin-bottom: 18px;
  color: #a76d17;
  font-size: 13px;
  font-weight: 900;
}

.product-card h3 {
  position: relative;
  z-index: 1;
  margin-bottom: 12px;
  color: #063f3c;
}

.product-card p {
  position: relative;
  z-index: 1;
}

.projects-section {
  background: #ffffff;
}

.project-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  max-width: 1296px;
  margin: 0 auto;
}

.project-feature,
.project-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfc;
}

.project-feature {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  overflow: hidden;
}

.project-feature > div:last-child {
  padding: 30px;
  align-self: center;
}

.project-feature h3 {
  margin-bottom: 12px;
}

.project-visual {
  min-height: 330px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0)),
    url("assets/oceanbird-hero.webp");
  background-position: center;
  background-size: cover;
}

.project-list {
  display: grid;
  gap: 16px;
}

.project-list article {
  min-height: 100px;
  padding: 24px;
}

.project-list strong {
  display: block;
  margin-bottom: 8px;
  color: #173431;
  font-size: 20px;
}

.project-list span {
  color: var(--muted);
  line-height: 1.5;
}

.factory-section {
  background: #edf3f2;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1296px;
  margin: 0 auto;
}

.process-grid article {
  min-height: 246px;
  padding: 28px;
  border-radius: 8px;
  color: #ffffff;
  background: #173632;
}

.process-grid strong {
  display: block;
  margin-bottom: 26px;
  color: var(--amber-2);
  font-size: 18px;
}

.process-grid h3 {
  margin-bottom: 12px;
}

.process-grid p {
  color: rgba(255, 255, 255, 0.78);
}

.quality-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: 54px;
  color: #f8fffc;
  background:
    linear-gradient(90deg, rgba(9, 34, 32, 0.96), rgba(9, 34, 32, 0.78)),
    url("assets/oceanbird-hero.webp");
  background-position: center;
  background-size: cover;
}

.quality-section > div {
  max-width: 640px;
}

.quality-section h2 {
  margin-bottom: 18px;
}

.quality-section p {
  color: rgba(255, 255, 255, 0.78);
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.quality-grid article {
  min-height: 118px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.quality-grid strong,
.quality-grid span {
  display: block;
}

.quality-grid strong {
  margin-bottom: 10px;
  color: var(--amber-2);
  font-size: 20px;
}

.quality-grid span {
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.5;
}

.faq-section {
  background: #ffffff;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 1296px;
  margin: 0 auto;
}

.faq-grid article {
  min-height: 200px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfc;
}

.faq-grid h3 {
  margin-bottom: 14px;
  font-size: 21px;
}

.quote-section {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 54px;
  padding: 82px 72px;
  color: #ffffff;
  background: #102a27;
}

.quote-section > div {
  align-self: center;
}

.quote-section h2 {
  margin-bottom: 18px;
}

.quote-section p {
  color: rgba(255, 255, 255, 0.78);
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.contact-list a {
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact-list span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.contact-list strong {
  color: #ffffff;
  font-size: 18px;
  line-height: 1.2;
}

.quote-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 28px 80px rgba(4, 18, 16, 0.34);
}

.quote-form label {
  display: grid;
  gap: 8px;
  color: #253432;
  font-size: 13px;
  font-weight: 900;
}

.quote-form input,
.quote-form textarea {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  color: #1a2927;
  background: #f8fbfa;
  outline: none;
}

.quote-form textarea {
  min-height: 110px;
  resize: vertical;
}

.quote-form input:focus,
.quote-form textarea:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(226, 160, 47, 0.16);
}

.quote-form .wide {
  grid-column: 1 / -1;
}

.quote-form button {
  grid-column: 1 / -1;
  min-height: 54px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 112px;
  padding: 22px 72px;
  color: #d7e4e1;
  background: #071b19;
}

.site-footer div,
.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer strong {
  margin-bottom: 8px;
  color: #ffffff;
  font-size: 18px;
}

.site-footer a {
  color: var(--amber-2);
  font-weight: 800;
}

.footer-contacts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 20px;
}

.footer-contacts a {
  color: #d7e4e1;
  font-size: 14px;
  font-weight: 700;
}

@media (max-width: 1100px) {
  .site-header {
    padding: 0 28px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 80px;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    background: #213f3c;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 14px 12px;
  }

  .nav-button {
    margin-top: 8px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 72px 28px 96px;
  }

  h1 {
    font-size: 48px;
  }

  h2 {
    font-size: 32px;
  }

  .metrics,
  .product-grid,
  .process-grid,
  .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-left: 28px;
    margin-right: 28px;
  }

  .section,
  .quote-section {
    padding-left: 28px;
    padding-right: 28px;
  }

  .section-heading,
  .project-layout,
  .quality-section,
  .quote-section {
    grid-template-columns: 1fr;
  }

  .project-feature {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding: 26px 28px;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 72px;
  }

  .brand {
    min-width: 0;
    font-size: 18px;
  }

  .brand-logo {
    width: 230px;
    height: auto;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .site-nav {
    top: 72px;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 28px;
  }

  h3 {
    font-size: 20px;
  }

  .hero-lead {
    font-size: 18px;
  }

  .hero-media img {
    height: 260px;
  }

  .metrics,
  .product-grid,
  .process-grid,
  .quality-grid,
  .faq-grid,
  .quote-form {
    grid-template-columns: 1fr;
  }

  .metrics {
    margin-top: -46px;
  }

  .section {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .project-visual {
    min-height: 230px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-contacts {
    justify-content: flex-start;
  }
}