:root {
  --ink: #14202b;
  --muted: #66717c;
  --line: #d9e0e6;
  --paper: #f4f7f8;
  --surface: #ffffff;
  --navy: #122f2a;
  --steel: #0c7b52;
  --copper: #c62835;
  --red: #c62835;
  --shadow: 0 24px 70px rgba(18, 48, 42, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(217, 224, 230, 0.86);
  background: rgba(244, 247, 248, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-logo-img {
  width: 132px;
  height: 48px;
  object-fit: contain;
}

.brand-mark,
.brand-logo {
  display: grid;
  width: 42px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--navy);
  font-size: 14px;
  font-weight: 900;
}

.brand-logo {
  width: auto;
  padding: 0 12px;
  color: var(--steel);
  border: 1px solid rgba(12, 123, 82, 0.2);
  background: #fff;
  font-size: 20px;
  font-style: italic;
  letter-spacing: 0;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  color: var(--muted);
  font-size: 15px;
}

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

.header-action,
.primary-button,
.secondary-button,
.contact-form button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
}

.header-action,
.primary-button,
.contact-form button {
  color: #fff;
  background: var(--steel);
  box-shadow: 0 12px 24px rgba(47, 111, 143, 0.22);
}

.secondary-button {
  color: var(--navy);
  border-color: var(--line);
  background: #fff;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
  align-items: center;
  min-height: calc(100vh - 74px);
  gap: clamp(32px, 6vw, 82px);
  padding: clamp(48px, 7vw, 92px) clamp(20px, 5vw, 72px) 42px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--steel);
  font-size: 13px;
  font-weight: 800;
}

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

h1 {
  max-width: 800px;
  margin-bottom: 22px;
  font-size: clamp(40px, 5.6vw, 70px);
  line-height: 1.06;
}

h2 {
  max-width: 780px;
  margin-bottom: 0;
  font-size: clamp(29px, 3.8vw, 46px);
  line-height: 1.16;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 710px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 42px;
}

.hero-stats {
  display: grid;
  max-width: 590px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
}

.hero-stats dt {
  font-size: 30px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-media {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

.photo-media img {
  object-position: center;
}

.product-hero {
  background:
    linear-gradient(90deg, rgba(244, 247, 248, 0.96), rgba(244, 247, 248, 0.84)),
    linear-gradient(135deg, rgba(12, 123, 82, 0.12), rgba(198, 40, 53, 0.08));
}

.logo-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  padding: 0 clamp(20px, 5vw, 72px) 56px;
}

.logo-strip span {
  display: grid;
  min-height: 76px;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.75);
  font-weight: 700;
}

.model-strip span {
  color: var(--navy);
  font-size: 22px;
  letter-spacing: 0;
}

.section,
.feature-band,
.profile,
.contact {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 30px;
  align-items: end;
  margin-bottom: 34px;
}

.service-grid,
.product-grid,
.category-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-card,
.product-card,
.category-card,
.case-card {
  min-height: 255px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.service-card p,
.product-card p,
.category-card p,
.case-card p,
.profile-copy p,
.about-copy p,
.process-list p,
.solution-list p,
.contact-note {
  color: var(--muted);
}

.product-card ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.tag-list span {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  border-radius: 8px;
  padding: 0 12px;
  color: var(--navy);
  border: 1px solid rgba(12, 123, 82, 0.2);
  background: #f4fbf7;
  font-size: 14px;
  font-weight: 800;
}

.product-card li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 700;
}

.product-card li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--copper);
}

.service-icon {
  display: inline-flex;
  margin-bottom: 44px;
  color: var(--copper);
  font-weight: 900;
}

.feature-band {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 48px;
  color: #fff;
  background: var(--navy);
}

.feature-band .eyebrow,
.feature-band p {
  color: #cddce7;
}

.process-list,
.solution-list {
  display: grid;
  gap: 18px;
}

.process-list div,
.solution-list div {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.process-list strong,
.solution-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.case-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.case-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.98)),
    linear-gradient(135deg, var(--steel), var(--copper));
}

.case-tag {
  color: var(--steel);
  font-size: 13px;
  font-weight: 800;
}

.profile,
.about-band,
.process-section,
.models-section,
.contact-form-section,
.quote-guide-section,
.product-proof {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 44px;
  align-items: start;
  background: #fff;
}

.process-section,
.models-section,
.contact-form-section,
.quote-guide-section {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
  grid-template-columns: 1fr;
  background: var(--paper);
}

.models-section {
  background: #fff;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.model-grid article {
  min-height: 142px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.model-grid strong {
  display: block;
  margin-bottom: 12px;
  color: var(--steel);
  font-size: 28px;
  line-height: 1;
}

.model-grid span {
  color: var(--muted);
  font-size: 14px;
}

.product-proof {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
  align-items: center;
}

.product-proof-copy p {
  max-width: 680px;
  margin: 22px 0;
  color: var(--muted);
  font-size: 17px;
}

.proof-photo {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.proof-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.model-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(12, 123, 82, 0.08), rgba(198, 40, 53, 0.06)),
    #fff;
  box-shadow: var(--shadow);
}

.model-board span {
  display: grid;
  min-height: 64px;
  place-items: center;
  border: 1px solid rgba(12, 123, 82, 0.18);
  border-radius: 8px;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.86);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 900;
}

.process-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-cards div {
  min-height: 210px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.process-cards span {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--copper);
  font-weight: 900;
}

.process-cards strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

.process-cards p {
  margin-bottom: 0;
  color: var(--muted);
}

.about-band {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
}

.about-copy p {
  max-width: 720px;
  margin-top: 22px;
  font-size: 17px;
}

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

.about-points div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.about-points strong {
  color: var(--navy);
  font-size: 22px;
}

.about-points span {
  color: var(--muted);
  text-align: right;
}

.profile-copy p {
  max-width: 720px;
  margin-top: 22px;
  font-size: 17px;
}

.profile-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.profile-list div {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.profile-list dt {
  color: var(--muted);
  font-weight: 700;
}

.profile-list dd {
  margin: 0;
  font-weight: 700;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.72fr);
  gap: 54px;
  align-items: start;
}

.contact-rich {
  background: var(--navy);
  color: #fff;
}

.contact-rich .eyebrow,
.contact-rich .contact-note {
  color: #b7d7ca;
}

.contact-person {
  display: grid;
  gap: 10px;
  max-width: 520px;
  margin-top: 26px;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact-person span {
  color: #b7d7ca;
  font-weight: 800;
}

.contact-person strong {
  font-size: clamp(36px, 6vw, 58px);
  line-height: 1;
}

.contact-person a {
  color: #fff;
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
}

.contact-person p {
  margin: 6px 0 0;
  color: #dcebe5;
}

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

.contact-panel div {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact-panel span {
  display: block;
  margin-bottom: 10px;
  color: #b7d7ca;
  font-size: 13px;
  font-weight: 800;
}

.contact-panel strong {
  display: block;
  margin-bottom: 10px;
  color: #fff;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
}

.contact-panel p {
  margin: 0;
  color: #dcebe5;
}

.contact-form-section {
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.72fr);
  background: var(--paper);
}

.quote-guide-section {
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1.18fr);
}

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

.quote-guide div {
  min-height: 132px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.quote-guide strong {
  display: block;
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 20px;
}

.quote-guide span {
  color: var(--muted);
}

.contact-note {
  max-width: 680px;
  margin-top: 22px;
  font-size: 17px;
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--ink);
  background: #fbfcfd;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form button {
  width: 100%;
  margin-top: 6px;
  cursor: pointer;
  font: inherit;
}

.contact-form button:disabled {
  cursor: default;
  opacity: 0.75;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .nav,
  .header-action {
    display: none;
  }

  .menu-button {
    display: block;
    justify-self: end;
  }

  .site-header.menu-open .nav {
    position: absolute;
    top: 73px;
    right: 20px;
    left: 20px;
    display: grid;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

  .site-header.menu-open .nav a {
    padding: 15px 18px;
    border-bottom: 1px solid var(--line);
  }

  .hero,
  .section-heading,
  .feature-band,
  .profile,
  .about-band,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .service-grid,
  .product-grid,
  .category-grid,
  .case-grid,
  .logo-strip,
  .process-cards,
  .model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-proof,
  .contact-form-section,
  .quote-guide-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand span:last-child {
    max-width: 12em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .brand-logo-img {
    width: 108px;
    height: 40px;
  }

  .hero,
  .section,
  .feature-band,
  .profile,
  .about-band,
  .process-section,
  .models-section,
  .product-proof,
  .contact-form-section,
  .quote-guide-section,
  .contact {
    padding-right: 16px;
    padding-left: 16px;
  }

  .hero-stats,
  .service-grid,
  .product-grid,
  .category-grid,
  .case-grid,
  .logo-strip,
  .process-cards,
  .model-board,
  .quote-guide,
  .model-grid {
    grid-template-columns: 1fr;
  }

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

  .service-card,
  .product-card,
  .category-card,
  .case-card {
    min-height: auto;
  }

  .process-cards div {
    min-height: auto;
  }

  .about-points div {
    display: grid;
    gap: 6px;
  }

  .about-points span {
    text-align: left;
  }

  .profile-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .contact-form {
    padding: 20px;
  }

  .site-footer {
    flex-direction: column;
  }
}