:root {
  --orange: #f04b21;
  --orange-dark: #b9341c;
  --ink: #202124;
  --muted: #696f77;
  --line: #e6e8ea;
  --paper: #ffffff;
  --soft: #f6f7f8;
  --charcoal: #3d4247;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(230, 232, 234, 0.9);
  backdrop-filter: blur(16px);
}

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

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 74px;
  height: 38px;
  color: #fff;
  background: var(--orange);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.brand-text {
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  color: var(--charcoal);
  font-size: 14px;
}

.site-nav a {
  padding: 10px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.site-nav a[aria-current="true"] {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #111;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(22, 24, 26, 0.88), rgba(22, 24, 26, 0.52) 44%, rgba(240, 75, 33, 0.48)),
    linear-gradient(0deg, rgba(0, 0, 0, 0.3), transparent 45%);
}

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

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(0.15);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: 80px 0 120px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #fff;
  opacity: 0.86;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 12px;
  font-size: clamp(40px, 6vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-en {
  margin-bottom: 24px;
  font-size: clamp(18px, 2.2vw, 30px);
  color: rgba(255, 255, 255, 0.88);
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 36px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  font-weight: 700;
}

.button.primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.button.ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(var(--max), calc(100% - 36px));
  margin: -72px auto 0;
  position: relative;
  z-index: 3;
  background: var(--orange);
  color: #fff;
  box-shadow: 0 24px 60px rgba(89, 40, 24, 0.2);
}

.stats div {
  min-height: 144px;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
}

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

.stats strong {
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1;
}

.stats span {
  font-size: 15px;
  opacity: 0.9;
}

.section {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(68px, 9vw, 116px) 0;
}

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

.section-heading h2,
.contact h2 {
  margin-bottom: 28px;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.15;
}

.intro {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(32px, 6vw, 86px);
}

.intro-copy {
  color: var(--charcoal);
  font-size: 17px;
  line-height: 2;
}

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

.service-card,
.customer-grid article {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.service-card span,
.customer-grid span {
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.service-card h3,
.customer-grid h3 {
  margin: 8px 0 16px;
  font-size: 22px;
}

.service-card ul,
.honor-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-card li {
  padding: 9px 0;
  color: var(--charcoal);
  border-top: 1px solid var(--line);
  line-height: 1.45;
}

.advantages {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(30px, 6vw, 80px);
  align-items: center;
}

.visual-panel {
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.visual-panel img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 28%;
}

.advantage-list {
  display: grid;
  gap: 14px;
}

.advantage-list p {
  margin: 0;
  padding: 18px 20px;
  color: #fff;
  background: var(--charcoal);
  border-left: 5px solid var(--orange);
  border-radius: 8px;
  font-size: 17px;
  line-height: 1.55;
}

.customers {
  border-top: 1px solid var(--line);
}

.customer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.customer-grid article {
  min-height: 178px;
}

.customer-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.honors {
  position: relative;
  width: 100%;
  min-height: 760px;
  margin: 0;
  padding: clamp(70px, 9vw, 116px) max(18px, calc((100vw - var(--max)) / 2));
  color: #fff;
  overflow: hidden;
  background: var(--orange-dark);
}

.honors::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(97, 31, 15, 0.88), rgba(240, 75, 33, 0.82));
}

.honors-bg {
  position: absolute;
  inset: 0;
}

.honors-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.9);
}

.honors-content {
  position: relative;
  z-index: 2;
  max-width: 940px;
}

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

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

.honor-list li {
  position: relative;
  padding-left: 24px;
  font-size: 16px;
  line-height: 1.8;
}

.honor-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
}

.source-pages {
  border-bottom: 1px solid var(--line);
}

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

.page-strip img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(25, 30, 36, 0.09);
}

.contact {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
  padding: clamp(52px, 8vw, 88px) max(18px, calc((100vw - var(--max)) / 2));
  color: #fff;
  background: var(--orange);
}

.contact .eyebrow {
  color: rgba(255, 255, 255, 0.82);
}

.contact h2 {
  max-width: 760px;
  margin-bottom: 0;
}

address {
  display: grid;
  gap: 12px;
  font-style: normal;
  font-size: 18px;
  white-space: nowrap;
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    min-height: 102px;
    gap: 8px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: calc(100vh - 102px);
  }

  .intro,
  .advantages,
  .contact {
    grid-template-columns: 1fr;
  }

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

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

  .contact {
    align-items: start;
  }

  address {
    white-space: normal;
  }
}

@media (max-width: 620px) {
  .brand-mark {
    width: 64px;
    height: 34px;
    font-size: 15px;
  }

  .brand-text {
    font-size: 15px;
  }

  .hero-content {
    padding: 56px 0 104px;
  }

  h1 {
    font-size: 36px;
  }

  .stats {
    grid-template-columns: 1fr;
    margin-top: -46px;
  }

  .stats div {
    min-height: 112px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  }

  .service-grid,
  .customer-grid,
  .page-strip {
    grid-template-columns: 1fr;
  }

  .section {
    width: min(100% - 28px, var(--max));
    padding: 58px 0;
  }

  .service-card,
  .customer-grid article {
    padding: 20px;
  }

  .honors {
    padding-left: 14px;
    padding-right: 14px;
  }

  .honor-list li {
    font-size: 15px;
  }
}