:root {
  --ink: #151719;
  --text: #2f3741;
  --muted: #65707c;
  --line: #d9dee5;
  --paper: #f4f6f8;
  --white: #ffffff;
  --red: #c40013;
  --red-dark: #9d0010;
  --steel: #26313d;
  --blue: #165f86;
  --gold: #d29a3c;
  --shadow: 0 16px 45px rgba(18, 30, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 92px;
}

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

html[lang="en"] body {
  font-family: Arial, Helvetica, sans-serif;
}

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

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

button {
  font: inherit;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  min-height: 78px;
  padding: 12px clamp(18px, 4vw, 48px);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(217, 222, 229, 0.88);
  box-shadow: 0 6px 24px rgba(20, 30, 42, 0.06);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled {
  min-height: 68px;
}

.brand {
  display: grid;
  grid-template-columns: 50px auto;
  align-items: center;
  gap: 12px;
  min-width: 250px;
}

.brand img {
  width: 50px;
  height: 50px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--white);
}

.brand strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.78rem;
}

.main-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  color: var(--steel);
  font-size: 0.94rem;
  font-weight: 700;
}

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

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

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

.main-nav .lang-switch {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.main-nav .lang-switch::after {
  display: none;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 6px;
  color: var(--white);
  background: var(--red);
  font-weight: 800;
  white-space: nowrap;
}

.contact-rail {
  position: fixed;
  right: 18px;
  bottom: 92px;
  z-index: 45;
  display: grid;
  gap: 8px;
}

.contact-rail a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 104px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid rgba(196, 0, 19, 0.22);
  border-radius: 6px;
  color: var(--red);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 26px rgba(18, 30, 42, 0.12);
  font-size: 0.86rem;
  font-weight: 850;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

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

.hero {
  position: relative;
  min-height: 88svh;
  color: var(--white);
  background: #111820;
  overflow: hidden;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("assets/images/sea-blade-carrier-2.webp");
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(11, 16, 22, 0.9) 0%, rgba(11, 16, 22, 0.72) 46%, rgba(11, 16, 22, 0.28) 100%),
    linear-gradient(0deg, rgba(11, 16, 22, 0.62), rgba(11, 16, 22, 0.12) 56%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 168px 0 58px;
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f1c15f;
}

.hero h1 {
  max-width: 930px;
  margin: 0;
  color: var(--white);
  font-size: clamp(2.8rem, 6.2vw, 5.7rem);
  line-height: 1.02;
  letter-spacing: 0;
}

html[lang="zh-CN"] .hero h1 {
  max-width: 860px;
  font-size: clamp(2.55rem, 5vw, 4.65rem);
}

.hero-copy {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  line-height: 1.2;
}

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

.button.primary:hover,
.header-cta:hover {
  background: var(--red-dark);
}

.button.light {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.54);
  background: rgba(255, 255, 255, 0.1);
}

.button.outline {
  color: var(--red);
  border-color: rgba(196, 0, 19, 0.42);
  background: var(--white);
}

.hero-facts {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr 0.9fr;
  gap: 1px;
  max-width: 940px;
  margin-top: 54px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.16);
}

.hero-facts div {
  padding: 18px;
  background: rgba(12, 18, 24, 0.56);
}

.hero-facts strong {
  display: block;
  color: var(--white);
  font-size: 1.06rem;
  line-height: 1.25;
}

.hero-facts span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

.quick-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 28px;
  padding: 18px 24px;
  color: var(--white);
  background: var(--steel);
  font-weight: 800;
}

.quick-bar span {
  position: relative;
}

.quick-bar span + span::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--gold);
}

.trust-band {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--white);
}

.trust-band div {
  min-height: 92px;
  padding: 18px;
  border-right: 1px solid var(--line);
}

.trust-band div:last-child {
  border-right: 0;
}

.trust-band strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.2;
}

.trust-band span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 84px 0;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(340px, 1.18fr);
  gap: 56px;
  align-items: start;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(300px, 1fr);
  gap: 38px;
  align-items: end;
  margin-bottom: 34px;
}

.section-heading .eyebrow,
.section-heading h2 {
  grid-column: 1;
}

.section-heading > p:not(.eyebrow) {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: end;
}

.section h2,
.contact-section h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 3.2vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-copy p,
.section-heading p:not(.eyebrow),
.contact-section p,
.vr-card p,
.product-card p,
.strength-grid p,
.video-points p {
  margin: 0;
  color: var(--muted);
}

.section-copy {
  display: grid;
  gap: 18px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.info-grid div {
  min-height: 108px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.info-grid span {
  display: block;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.info-grid strong {
  display: block;
  margin-top: 10px;
  color: var(--ink);
  line-height: 1.28;
}

.video-section,
.strength-section,
.cases-section {
  border-top: 1px solid var(--line);
}

.video-layout {
  display: grid;
  grid-template-columns: minmax(360px, 1.25fr) minmax(280px, 0.75fr);
  gap: 24px;
  align-items: stretch;
}

.company-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid #111;
  border-radius: 8px;
  background: #000;
  box-shadow: var(--shadow);
  object-fit: contain;
}

.video-points {
  display: grid;
  gap: 12px;
}

.video-points article {
  display: grid;
  align-content: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.video-points span {
  color: var(--red);
  font-weight: 900;
}

.video-points h3,
.strength-grid h3,
.product-card h3 {
  margin: 10px 0 8px;
  color: var(--ink);
  font-size: 1.2rem;
  line-height: 1.2;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 28px rgba(18, 30, 42, 0.06);
}

.product-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #e7ebef;
}

.product-card div {
  display: grid;
  align-content: start;
  padding: 18px;
}

.product-card a {
  display: inline-flex;
  width: fit-content;
  margin-top: 14px;
  color: var(--red);
  font-weight: 800;
  line-height: 1.35;
}

.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.strength-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.strength-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #e7ebef;
}

.strength-grid h3,
.strength-grid p {
  padding-inline: 18px;
}

.strength-grid h3 {
  padding-top: 16px;
}

.strength-grid p {
  padding-bottom: 20px;
}

.vr-section {
  padding-top: 20px;
}

.vr-card {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(20, 28, 36, 0.94), rgba(20, 28, 36, 0.82)),
    url("assets/images/project-special-wide.webp") center / cover;
}

.vr-card h2,
.vr-card p {
  color: var(--white);
}

.vr-card p:not(.eyebrow) {
  max-width: 780px;
  color: rgba(255, 255, 255, 0.78);
}

.case-strip {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 18px;
}

.case-strip figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.case-strip img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.case-strip figcaption {
  padding: 14px 16px;
  color: var(--ink);
  font-weight: 800;
}

.contact-section {
  padding: 84px 0;
  color: var(--white);
  background: var(--steel);
}

.contact-inner {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(340px, 1.15fr);
  gap: 42px;
  align-items: start;
}

.contact-section .eyebrow {
  color: #f1c15f;
}

.contact-section h2,
.contact-section p {
  color: var(--white);
}

.contact-section p {
  color: rgba(255, 255, 255, 0.76);
  margin-top: 18px;
}

.contact-panel {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact-panel dl {
  display: grid;
  gap: 0;
  margin: 0;
}

.contact-panel dl div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.contact-panel dt {
  color: #f1c15f;
  font-weight: 900;
}

.contact-panel dd {
  margin: 0;
  color: var(--white);
}

.contact-panel a {
  font-weight: 900;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 4vw, 48px);
  color: rgba(255, 255, 255, 0.72);
  background: #111820;
}

.site-footer div {
  display: grid;
  gap: 4px;
}

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

.site-footer a {
  color: #f1c15f;
  font-weight: 800;
}

@media (max-width: 1100px) {
  .site-header {
    grid-template-columns: auto auto 1fr;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
    grid-column: 3;
    grid-row: 1;
  }

  .header-cta {
    display: none;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 18px;
    display: none;
    width: min(330px, calc(100vw - 36px));
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: grid;
    gap: 4px;
  }

  .main-nav a {
    padding: 11px 12px;
    border-radius: 6px;
  }

  .main-nav a:hover {
    background: var(--paper);
  }

  .main-nav a::after {
    display: none;
  }

  .hero-facts,
  .info-grid,
  .strength-grid,
  .trust-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-section,
  .section-heading,
  .video-layout,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .section-heading > p:not(.eyebrow) {
    grid-column: 1;
    grid-row: auto;
  }

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

@media (max-width: 760px) {
  body {
    padding-bottom: 56px;
  }

  [id] {
    scroll-margin-top: 82px;
  }

  .site-header {
    min-height: 68px;
    padding-inline: 14px;
  }

  .brand {
    grid-template-columns: 42px auto;
    min-width: 0;
  }

  .brand img {
    width: 42px;
    height: 42px;
  }

  .brand strong {
    font-size: 0.94rem;
  }

  .brand small {
    font-size: 0.72rem;
  }

  .hero {
    min-height: 88svh;
  }

  .hero-media {
    background-position: 58% center;
  }

  .hero-inner {
    width: min(100% - 32px, 1180px);
    padding-top: 112px;
    padding-bottom: 36px;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .hero-actions {
    display: grid;
  }

  .hero-facts,
  .info-grid,
  .product-grid,
  .strength-grid,
  .trust-band,
  .case-strip,
  .vr-card,
  .contact-panel dl div,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .hero-facts {
    margin-top: 34px;
  }

  .quick-bar {
    justify-content: flex-start;
    padding-inline: 16px;
  }

  .quick-bar span + span::before {
    display: none;
  }

  .contact-rail {
    left: 0;
    right: 0;
    bottom: 0;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line);
    background: var(--white);
  }

  .contact-rail a {
    min-width: 0;
    min-height: 56px;
    border: 0;
    border-right: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
  }

  .contact-rail a:last-child {
    border-right: 0;
  }

  .trust-band {
    width: min(100% - 32px, 1180px);
    margin-top: 16px;
    border-top: 1px solid var(--line);
  }

  .trust-band div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .trust-band div:last-child {
    border-bottom: 0;
  }

  .section {
    width: min(100% - 32px, 1180px);
    padding: 62px 0;
  }

  .section-heading {
    gap: 18px;
    margin-bottom: 24px;
  }

  .company-video {
    aspect-ratio: 16 / 10;
  }

  .vr-card {
    align-items: start;
  }

  .contact-section {
    padding: 62px 0;
  }

  .contact-inner {
    width: min(100% - 32px, 1180px);
  }

  .contact-panel {
    padding: 20px;
  }

  .contact-panel dl div {
    gap: 6px;
  }

  .contact-actions {
    display: grid;
  }

  .site-footer {
    display: grid;
    padding: 24px 16px;
  }
}