:root {
  --ink: #172126;
  --muted: #5c6b72;
  --line: #d9e1e4;
  --paper: #f7f9f8;
  --white: #ffffff;
  --yellow: #f2b705;
  --yellow-deep: #b77900;
  --green: #1f7a58;
  --blue: #206a8c;
  --brick: #a3412d;
  --shadow: 0 18px 42px rgba(23, 33, 38, 0.16);
  --radius: 8px;
  font-family:
    "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  letter-spacing: 0;
}

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;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: rgba(16, 24, 28, 0.42);
  backdrop-filter: blur(14px);
  transition:
    background 180ms ease,
    box-shadow 180ms ease,
    color 180ms ease;
}

.site-header.scrolled,
.site-header.menu-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 26px rgba(23, 33, 38, 0.09);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  color: #1e2528;
  background: var(--yellow);
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 6px;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-size: 18px;
}

.brand small {
  margin-top: 2px;
  font-size: 12px;
  opacity: 0.82;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
  font-weight: 700;
}

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

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: inherit;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.button svg,
.catalog-tab svg,
.strength-item svg,
.scope-card svg,
.service-icons svg,
.contact-row svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
}

.button {
  gap: 8px;
}

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

.button.primary {
  color: #1c2529;
  background: var(--yellow);
  box-shadow: 0 12px 28px rgba(242, 183, 5, 0.28);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.hero {
  position: relative;
  min-height: min(760px, 82svh);
  margin-top: -72px;
  overflow: hidden;
  color: var(--white);
  background: #111a1e;
}

.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 15, 17, 0.9) 0%, rgba(10, 15, 17, 0.66) 42%, rgba(10, 15, 17, 0.2) 100%),
    linear-gradient(180deg, rgba(10, 15, 17, 0.46) 0%, rgba(10, 15, 17, 0.08) 48%, rgba(10, 15, 17, 0.54) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(128px, 18vh, 188px) 0 76px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--yellow);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
}

.eyebrow.dark {
  color: var(--green);
}

.eyebrow.light {
  color: var(--yellow);
}

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

h1 {
  max-width: 720px;
  margin-bottom: 20px;
  font-size: clamp(44px, 8vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-facts span {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  min-height: 42px;
  padding: 0 14px;
  color: rgba(255, 255, 255, 0.84);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
}

.hero-facts strong {
  color: var(--yellow);
}

.section {
  padding: clamp(64px, 9vw, 100px) 0;
}

.section-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.65fr);
  gap: 28px;
  max-width: none;
  align-items: end;
}

.section-heading h2,
.service-copy h2,
.contact-layout h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.service-copy p,
.contact-layout p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.intro-band {
  background: var(--white);
}

.featured-brands-section {
  position: relative;
  background:
    linear-gradient(180deg, #ffffff 0%, #f3f7f5 100%);
}

.featured-heading {
  max-width: 920px;
  margin-bottom: 30px;
}

.featured-heading h2 {
  margin-bottom: 0;
  font-size: clamp(32px, 4.2vw, 54px);
  line-height: 1.14;
}

.no-break {
  white-space: nowrap;
}

.featured-heading p:not(.eyebrow) {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

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

@media (max-width: 1180px) {
  .featured-brand-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.featured-brand-card {
  display: grid;
  grid-template-rows: 174px minmax(0, 1fr);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 38px rgba(23, 33, 38, 0.1);
}

.featured-brand-card.yuhong {
  border-top: 6px solid #d71920;
}

.featured-brand-card.dufa {
  border-top: 6px solid #222222;
}

.featured-brand-card.motian {
  border-top: 6px solid #114d91;
}

.featured-brand-card.maco {
  border-top: 6px solid #d61034;
}

.featured-logo-panel {
  display: grid;
  place-items: center;
  padding: 20px;
  background:
    linear-gradient(135deg, #ffffff, #f5f8f8);
  border-bottom: 1px solid var(--line);
}

.featured-logo-panel.red-logo {
  background: #d61034;
}

.featured-logo-panel img {
  width: 100%;
  height: 126px;
  object-fit: contain;
}

.feature-wordmark {
  display: block;
  margin-top: 8px;
  color: #d71920;
  font-size: 28px;
  line-height: 1;
}

.featured-logo-panel.red-logo img {
  height: 138px;
}

.featured-brand-copy {
  padding: 24px;
}

.brand-tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin-bottom: 14px;
  padding: 0 10px;
  color: #172126;
  background: var(--yellow);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 900;
}

.featured-brand-copy h3 {
  margin-bottom: 10px;
  font-size: 25px;
}

.featured-brand-copy p {
  margin-bottom: 18px;
  color: var(--muted);
  line-height: 1.76;
}

.featured-brand-copy ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.featured-brand-copy li {
  padding: 7px 10px;
  color: #285346;
  background: #eaf3ef;
  border: 1px solid #d5e5dd;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.scope-card {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  padding: 28px;
  color: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 18px 36px rgba(23, 33, 38, 0.13);
}

.scope-card::after {
  position: absolute;
  right: -36px;
  bottom: -40px;
  width: 154px;
  height: 154px;
  content: "";
  background: rgba(255, 255, 255, 0.14);
  border-radius: 999px;
}

.scope-card.paint {
  background: linear-gradient(145deg, #0e83bf, #17a6d6);
}

.scope-card.waterproof {
  background: linear-gradient(145deg, #138449, #37ae5a);
}

.scope-card.powder {
  background: linear-gradient(145deg, #c95b11, #f2a007);
}

.scope-card span {
  display: block;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.scope-card svg {
  width: 38px;
  height: 38px;
  margin-bottom: 20px;
}

.scope-card h3 {
  margin-bottom: 12px;
  font-size: 25px;
}

.scope-card p {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
  line-height: 1.82;
}

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

.strength-item {
  min-height: 230px;
  padding: 24px;
  background: linear-gradient(180deg, #ffffff, #f4f8f7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.strength-item svg {
  width: 34px;
  height: 34px;
  margin-bottom: 20px;
  color: var(--green);
}

.strength-item:nth-child(2) svg {
  color: var(--blue);
}

.strength-item:nth-child(3) svg {
  color: var(--brick);
}

.strength-item:nth-child(4) svg {
  color: var(--yellow-deep);
}

.strength-item h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.strength-item p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.78;
}

.catalog-section {
  background:
    linear-gradient(180deg, #f7f9f8 0%, #eef4f2 100%);
}

.brands-section {
  background: #f2f6f4;
}

.brand-logo-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.brand-logo-grid article {
  display: grid;
  gap: 12px;
  align-content: center;
  min-height: 164px;
  padding: 16px;
  text-align: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 26px rgba(23, 33, 38, 0.06);
}

.brand-logo-grid img {
  width: 100%;
  height: 96px;
  object-fit: contain;
}

.brand-logo-grid span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.catalog-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.catalog-tabs {
  display: grid;
  gap: 10px;
}

.catalog-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 0 16px;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition:
    background 160ms ease,
    color 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.catalog-tab:hover,
.catalog-tab:focus-visible {
  transform: translateX(2px);
}

.catalog-tab.active {
  color: var(--white);
  background: var(--green);
  border-color: var(--green);
}

.catalog-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  min-height: 302px;
}

.product-card {
  display: flex;
  min-height: 144px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(23, 33, 38, 0.06);
}

.product-card::before {
  width: 5px;
  margin-right: 14px;
  content: "";
  background: var(--yellow);
  border-radius: 4px;
}

.product-card:nth-child(2n)::before {
  background: var(--green);
}

.product-card:nth-child(3n)::before {
  background: var(--brick);
}

.product-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.product-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.68;
}

.service-section {
  background: var(--white);
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.service-copy {
  position: sticky;
  top: 102px;
}

.service-copy h2 {
  margin-bottom: 22px;
}

.service-steps {
  display: grid;
  gap: 14px;
}

.service-steps article {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  min-height: 138px;
  padding: 24px;
  background: #f7f9f8;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.service-icons article {
  grid-template-columns: 52px minmax(0, 1fr);
}

.service-icons svg {
  width: 34px;
  height: 34px;
  color: var(--green);
}

.service-icons p {
  grid-column: 2;
}

.service-icons article:nth-child(2) svg {
  color: var(--blue);
}

.service-icons article:nth-child(3) svg {
  color: var(--brick);
}

.service-steps span {
  color: var(--green);
  font-size: 24px;
  font-weight: 900;
}

.service-steps h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.service-steps p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.75;
}

.contact-section {
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(23, 33, 38, 0.98), rgba(31, 122, 88, 0.9)),
    #172126;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
}

.contact-layout p {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.78);
}

.contact-card {
  padding: 26px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-row {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-row:first-child {
  padding-top: 0;
}

.contact-row svg {
  margin-top: 4px;
  color: var(--yellow);
}

.contact-row small {
  display: block;
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.contact-row.pending {
  color: rgba(255, 255, 255, 0.78);
}

.contact-button {
  width: 100%;
  margin-top: 20px;
  color: #172126;
  background: var(--yellow);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 4vw, 56px);
  color: rgba(255, 255, 255, 0.76);
  background: #11181b;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover {
  color: #ffffff;
}

@media (max-width: 920px) {
  .site-header {
    min-height: 66px;
  }

  .brand small {
    max-width: 210px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .menu-button {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 18px;
    left: 18px;
    display: grid;
    gap: 4px;
    padding: 12px;
    color: var(--ink);
    pointer-events: none;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 18px 40px rgba(23, 33, 38, 0.14);
    opacity: 0;
    transform: translateY(-8px);
    transition:
      opacity 160ms ease,
      transform 160ms ease;
  }

  .site-nav.open {
    pointer-events: auto;
    opacity: 1;
    transform: translateY(0);
  }

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

  .hero {
    min-height: 78svh;
    margin-top: -66px;
  }

  .hero-content {
    padding-top: 118px;
  }

  .section-heading.split,
  .catalog-shell,
  .service-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .strength-grid,
  .featured-brand-grid,
  .scope-grid,
  .brand-logo-grid,
  .catalog-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .service-copy {
    position: static;
  }
}

@media (max-width: 620px) {
  .hero-content,
  .section-inner {
    width: calc(100% - 40px);
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
    font-size: 15px;
  }

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

  .brand small {
    max-width: 170px;
    font-size: 11px;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(10, 15, 17, 0.74) 0%, rgba(10, 15, 17, 0.66) 46%, rgba(10, 15, 17, 0.82) 100%),
      linear-gradient(90deg, rgba(10, 15, 17, 0.72), rgba(10, 15, 17, 0.2));
  }

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

  .hero-copy {
    font-size: 16px;
    overflow-wrap: break-word;
  }

  .featured-heading h2 {
    font-size: 30px;
    line-height: 1.18;
  }

  .button {
    min-width: 0;
    width: 100%;
  }

  .hero-facts span {
    width: 100%;
  }

  .strength-grid,
  .featured-brand-grid,
  .scope-grid,
  .brand-logo-grid,
  .catalog-panel,
  .catalog-tabs {
    grid-template-columns: 1fr;
  }

  .product-card,
  .scope-card,
  .strength-item {
    min-height: auto;
  }

  .service-steps article {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: grid;
  }
}