:root {
  --bg: #ffffff;
  --ink: #13202a;
  --muted: #667582;
  --line: #dfe7ec;
  --soft: #f3f7f9;
  --soft-blue: #e9f5fb;
  --accent: #087fa3;
  --accent-dark: #075e7b;
  --green: #1e9c70;
  --shadow: 0 22px 55px rgba(19, 32, 42, 0.14);
  font-family:
    Inter, "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--bg);
}

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

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 30px;
  width: 100%;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(223, 231, 236, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
  background: linear-gradient(135deg, var(--accent), var(--green));
  border-radius: 8px;
}

.brand strong {
  display: block;
  font-size: 21px;
  line-height: 1.05;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #394b58;
  font-size: 15px;
  font-weight: 600;
}

.desktop-nav a:hover {
  color: var(--accent);
}

.nav-cta,
.primary-button,
.secondary-button,
.inquiry-form button,
.mobile-quote {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 700;
}

.nav-cta,
.primary-button,
.inquiry-form button,
.mobile-quote {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 14px 30px rgba(8, 127, 163, 0.24);
}

.nav-cta:hover,
.primary-button:hover,
.inquiry-form button:hover,
.mobile-quote:hover {
  background: var(--accent-dark);
}

.secondary-button {
  color: var(--ink);
  border: 1px solid var(--line);
  background: #fff;
}

.secondary-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.mobile-panel {
  display: none;
  position: absolute;
  top: 74px;
  right: 20px;
  left: 20px;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.mobile-panel a {
  padding: 8px 4px;
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(32px, 5vw, 82px);
  align-items: center;
  min-height: calc(100vh - 82px);
  padding: clamp(42px, 6vw, 76px) clamp(20px, 5vw, 72px) clamp(38px, 5vw, 58px);
  background:
    linear-gradient(90deg, #fff 0%, #fff 52%, rgba(233, 245, 251, 0.8) 52%, rgba(233, 245, 251, 0.28) 100%),
    #fff;
}

.hero-copy {
  max-width: 650px;
}

.hero h1 {
  margin: 0;
  max-width: 660px;
  font-size: clamp(40px, 4.5vw, 58px);
  line-height: 1.02;
  font-weight: 850;
  letter-spacing: 0;
}

.hero p {
  max-width: 620px;
  margin: 22px 0 0;
  color: #485a66;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.75;
}

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

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  margin-top: 34px;
  color: #40515d;
  font-size: 15px;
  font-weight: 700;
}

.hero-proof span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-proof svg {
  color: var(--green);
}

.hero-media {
  position: relative;
  min-height: 500px;
}

.hero-media img {
  width: 100%;
  height: min(48vw, 500px);
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel {
  position: absolute;
  right: 28px;
  bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 310px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 8px;
  color: #fff;
  background: rgba(19, 32, 42, 0.72);
  backdrop-filter: blur(16px);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
}

.section {
  padding: clamp(72px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(160px, 0.4fr) minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 44px;
}

.section-heading.narrow {
  grid-template-columns: minmax(160px, 0.35fr) minmax(0, 1fr);
  max-width: 960px;
}

.section-heading span,
.factory-copy span,
.quality-copy span,
.contact-copy span {
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
}

.section-heading h2,
.factory-copy h2,
.quality-copy h2,
.contact-copy h2 {
  margin: 0;
  font-size: clamp(30px, 3.8vw, 50px);
  line-height: 1.14;
  letter-spacing: 0;
}

.section-heading p,
.factory-copy p,
.quality-copy p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

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

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(8, 127, 163, 0.35);
  box-shadow: 0 18px 40px rgba(19, 32, 42, 0.12);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--soft);
}

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

.product-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.product-card p {
  min-height: 78px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.product-card a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 18px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
}

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

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.process-item {
  min-height: 250px;
  padding: 30px;
  background: #fff;
}

.process-item strong {
  display: block;
  margin-bottom: 54px;
  color: var(--accent);
  font-size: 18px;
}

.process-item h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.process-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.factory-section {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
  gap: clamp(34px, 5vw, 76px);
  align-items: center;
  padding: clamp(72px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.factory-image img {
  width: 100%;
  height: 640px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.factory-copy p {
  margin-top: 22px;
}

.strength-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.strength-grid div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.strength-grid strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
}

.strength-grid small {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-size: 14px;
}

.quality {
  display: grid;
  grid-template-columns: 0.82fr 0.9fr 0.72fr;
  gap: 36px;
  align-items: center;
  background: #10202a;
  color: #fff;
}

.quality-copy p {
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.72);
}

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

.quality-list article {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.quality-list svg {
  flex: 0 0 auto;
  color: #52cfa8;
}

.quality-list h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.quality-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  line-height: 1.7;
}

.quality-image {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.7fr);
  gap: clamp(34px, 6vw, 88px);
  padding: clamp(72px, 9vw, 124px) clamp(20px, 5vw, 72px);
  background:
    linear-gradient(120deg, rgba(233, 245, 251, 0.95), rgba(255, 255, 255, 0.65)),
    #fff;
}

.contact-copy p {
  max-width: 720px;
  margin-top: 22px;
}

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.contact-lines a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  font-weight: 800;
}

.contact-lines svg {
  color: var(--accent);
}

.inquiry-form {
  display: grid;
  gap: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.inquiry-form label {
  display: grid;
  gap: 8px;
  color: #334551;
  font-size: 14px;
  font-weight: 800;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 15px;
  color: var(--ink);
  background: #fff;
  outline: none;
  font-size: 15px;
  resize: vertical;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(8, 127, 163, 0.1);
}

.inquiry-form button {
  width: 100%;
  border: 0;
  cursor: pointer;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: #6c7a84;
  border-top: 1px solid var(--line);
  background: #fff;
}

footer div {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

footer strong {
  color: var(--ink);
  font-size: 20px;
}

footer p {
  margin: 0;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .hero,
  .factory-section,
  .contact-section,
  .quality {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    background: #fff;
  }

  .hero-media,
  .hero-media img,
  .factory-image img {
    min-height: 0;
    height: min(62vw, 560px);
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

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

  .quality-image {
    height: min(58vw, 480px);
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 14px 18px;
  }

  .desktop-nav,
  .nav-cta {
    display: none;
  }

  .menu-button {
    display: grid;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand strong {
    font-size: 19px;
  }

  .hero,
  .section,
  .factory-section,
  .contact-section {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1 {
    font-size: clamp(38px, 13vw, 58px);
  }

  .hero p {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .hero-media img,
  .factory-image img,
  .quality-image {
    height: 320px;
  }

  .hero-panel {
    right: 14px;
    bottom: 14px;
    left: 14px;
    max-width: none;
    font-size: 14px;
  }

  .product-grid,
  .process-grid,
  .strength-grid {
    grid-template-columns: 1fr;
  }

  .process-item {
    min-height: 210px;
  }

  .process-item strong {
    margin-bottom: 34px;
  }

  .quality {
    padding-right: 18px;
    padding-left: 18px;
  }

  .inquiry-form {
    padding: 20px;
  }

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

.mobile-panel.is-open {
  display: grid;
}