:root {
  --red: #d7002f;
  --red-dark: #a90022;
  --ink: #171717;
  --muted: #666b73;
  --line: #e6e8eb;
  --soft: #f5f6f8;
  --white: #fff;
  --shadow: 0 18px 42px rgba(0, 0, 0, 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(--white);
  overflow-x: hidden;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  color: var(--white);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent);
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-solid {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 14px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--white);
  background: var(--red);
  font-weight: 800;
  clip-path: polygon(18% 0, 100% 0, 82% 100%, 0 100%);
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand strong {
  font-size: 16px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.82;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 15px;
}

.nav a {
  position: relative;
  white-space: nowrap;
}

.nav a::after {
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 0;
  height: 2px;
  content: "";
  background: var(--red);
  transition: width 0.22s ease;
}

.nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 9px 18px;
  border: 1px solid currentColor;
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 760px;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 34%, rgba(215, 0, 47, 0.22), transparent 23%),
    linear-gradient(135deg, #111419 0%, #242a31 56%, #0b0d10 100%);
  overflow: hidden;
}

.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(90deg, transparent 30%, #000 70%);
  mask-image: linear-gradient(90deg, transparent 30%, #000 70%);
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 40%, transparent 0 150px, rgba(215, 0, 47, 0.54) 151px 153px, transparent 154px 232px, rgba(255, 255, 255, 0.1) 233px 234px, transparent 235px),
    linear-gradient(116deg, transparent 0 68%, rgba(215, 0, 47, 0.16) 68% 79%, transparent 79%),
    linear-gradient(90deg, rgba(5, 7, 9, 0.44), transparent 66%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 188px 48px 200px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--red);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ff5b75;
}

h1,
h2,
h3,
p,
a,
span,
dd,
dt {
  min-width: 0;
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 58px;
  line-height: 1.12;
  font-weight: 700;
}

.hero-content p:not(.eyebrow) {
  max-width: 640px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 20px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 38px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 26px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn.primary:hover {
  background: var(--red-dark);
}

.btn.ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

.hero-strip {
  position: absolute;
  z-index: 2;
  left: 48px;
  right: 48px;
  bottom: 34px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.hero-strip div {
  min-width: 0;
  padding: 26px 30px;
  border-right: 1px solid var(--line);
}

.hero-strip div:last-child {
  border-right: 0;
}

.hero-strip strong {
  display: block;
  color: var(--red);
  font-size: 32px;
}

.hero-strip span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 104px 48px;
}

.section-head {
  max-width: 740px;
  margin-bottom: 42px;
}

.section-head.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

h2 {
  margin: 0;
  font-size: 40px;
  line-height: 1.22;
}

h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.3;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 52px;
  align-items: center;
}

.intro-copy {
  max-width: 680px;
}

.intro-copy p {
  margin: 0 0 22px;
  color: #34383d;
  font-size: 20px;
  line-height: 1.85;
}

.feature-photo {
  height: 420px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.solution-grid article {
  min-height: 242px;
  padding: 30px;
  background: var(--white);
  border-top: 4px solid var(--red);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.solution-grid article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.solution-grid span {
  display: block;
  margin-bottom: 26px;
  color: var(--red);
  font-size: 14px;
  font-weight: 800;
}

.solution-grid p,
.spec-panel dd,
.quality-card p {
  color: var(--muted);
  line-height: 1.72;
}

.image-band {
  position: relative;
  display: grid;
  min-height: 560px;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.image-band img {
  position: absolute;
  inset: 0;
}

.image-band::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.08));
}

.image-band div {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding: 0 48px 78px;
}

.image-band p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.82);
  font-size: 19px;
  line-height: 1.7;
}

.capacity-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(330px, 0.65fr);
  gap: 28px;
}

.equipment-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.equipment-cards article {
  background: var(--white);
  border: 1px solid var(--line);
}

.equipment-cards img {
  height: 250px;
  object-fit: contain;
  padding: 20px;
  background: #fafafa;
}

.equipment-cards h3,
.equipment-cards p {
  padding: 0 24px;
}

.equipment-cards h3 {
  margin-top: 22px;
}

.equipment-cards p {
  margin: 10px 0 24px;
  color: var(--muted);
  line-height: 1.6;
}

.spec-panel {
  padding: 34px;
  color: var(--white);
  background: #1f2329;
}

.spec-panel h3 {
  margin-bottom: 26px;
}

.spec-panel dl {
  margin: 0;
}

.spec-panel div {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.spec-panel dt {
  margin-bottom: 8px;
  color: #ff6a80;
  font-weight: 700;
}

.spec-panel dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.quality {
  background: #111;
}

.quality-card {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1.15fr);
  gap: 46px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  color: var(--white);
}

.quality-card h2 {
  max-width: 560px;
}

.quality-card p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.core-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.core-list span {
  padding: 20px 22px;
  background: rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--red);
  font-weight: 700;
}

.factory-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

figure {
  margin: 0;
  overflow: hidden;
  background: var(--soft);
}

figure img {
  height: 250px;
  transition: transform 0.28s ease;
}

figure:hover img {
  transform: scale(1.04);
}

figcaption {
  padding: 18px 20px;
  font-weight: 700;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.8fr);
  align-items: center;
  gap: 54px;
  padding: 82px 48px;
  color: var(--white);
  background: linear-gradient(120deg, var(--red), #77121c);
  scroll-margin-top: 72px;
}

.contact h2 {
  max-width: 780px;
}

.contact-intro {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.72;
}

.contact .eyebrow {
  color: rgba(255, 255, 255, 0.78);
}

.contact-methods {
  display: grid;
  gap: 14px;
}

.contact-method {
  display: grid;
  gap: 7px;
  padding: 22px 24px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.contact-method:hover,
.contact-method:focus-visible {
  transform: translateY(-2px);
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.17);
}

.contact-method span,
.contact-method small {
  color: rgba(255, 255, 255, 0.72);
}

.contact-method span {
  font-size: 14px;
}

.contact-method strong {
  font-size: 21px;
  overflow-wrap: anywhere;
}

.contact-method small {
  font-size: 12px;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 48px;
  color: #8a8f96;
  background: #151515;
}

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

@media (max-width: 1060px) {
  .site-header {
    padding: 0 26px;
  }

  .nav {
    gap: 18px;
  }

  h1 {
    font-size: 46px;
  }

  h2 {
    font-size: 34px;
  }

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

  .intro-grid,
  .capacity-layout,
  .quality-card,
  .contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    height: 64px;
    padding: 0 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .menu-toggle {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    padding: 0;
    color: currentColor;
    background: transparent;
    border: 0;
  }

  .menu-toggle span {
    width: 22px;
    height: 2px;
    background: currentColor;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 18px 24px;
    color: var(--ink);
    background: var(--white);
    box-shadow: 0 16px 28px rgba(0, 0, 0, 0.12);
  }

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

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

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

  .hero {
    min-height: 760px;
  }

  .hero-content {
    padding: 132px 22px 250px;
  }

  h1 {
    font-size: 34px;
    word-break: break-all;
  }

  .hero-content p:not(.eyebrow) {
    font-size: 17px;
  }

  .hero-strip {
    left: 18px;
    right: 18px;
    bottom: 20px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-strip div {
    padding: 18px;
  }

  .hero-strip strong {
    font-size: 25px;
  }

  .section {
    padding: 70px 22px;
  }

  h2 {
    font-size: 27px;
    word-break: break-all;
  }

  .intro-copy p {
    font-size: 17px;
  }

  .feature-photo {
    height: 280px;
  }

  .solution-grid,
  .equipment-cards,
  .factory-grid,
  .core-list {
    grid-template-columns: 1fr;
  }

  .image-band {
    min-height: 520px;
  }

  .image-band div {
    padding: 0 22px 58px;
  }

  .equipment-cards img {
    height: 220px;
  }

  .quality-card {
    gap: 28px;
  }

  .contact {
    gap: 30px;
    padding: 66px 22px;
    scroll-margin-top: 64px;
  }

  .contact-method {
    padding: 20px;
  }

  .contact-method strong {
    font-size: 18px;
  }

  .footer {
    padding: 26px 22px;
  }
}