:root {
  --ink: #161616;
  --muted: #63666a;
  --line: #dedbd4;
  --paper: #f7f3ec;
  --panel: #ffffff;
  --gold: #b67a2f;
  --green: #315d50;
  --coral: #d9654a;
  --charcoal: #24282b;
  --shadow: 0 22px 50px rgba(27, 26, 23, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Helvetica Neue",
    Arial,
    sans-serif;
  background: var(--paper);
  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: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(247, 243, 236, 0.92);
  border-bottom: 1px solid rgba(22, 22, 22, 0.08);
  backdrop-filter: blur(16px);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  color: #fff;
  background: var(--green);
  border-radius: 8px;
  font-weight: 800;
}

.brand-text {
  display: grid;
  gap: 1px;
}

.brand-text strong {
  font-size: 16px;
  line-height: 1.25;
}

.brand-text small {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  color: #343434;
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--gold);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.92fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 83px);
  padding: clamp(48px, 7vw, 96px) clamp(18px, 4vw, 56px) 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 84px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 34px;
  color: #4f5350;
  font-size: clamp(17px, 2vw, 21px);
}

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

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 6px;
  font-weight: 800;
}

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

.secondary-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.hero-visual {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--charcoal);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 540px;
  object-fit: cover;
  opacity: 0.88;
}

.hero-panel {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: min(320px, calc(100% - 48px));
  padding: 22px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(22, 22, 22, 0.7);
  backdrop-filter: blur(14px);
}

.hero-panel span {
  display: block;
  margin-bottom: 6px;
  color: #f2c37d;
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.hero-panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
}

.section {
  padding: clamp(58px, 7vw, 94px) clamp(18px, 4vw, 56px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.68fr) minmax(280px, 0.32fr);
  gap: 30px;
  align-items: end;
  margin-bottom: 34px;
}

.section-heading.compact {
  display: block;
  max-width: 720px;
}

.section-heading h2,
.split-copy h2,
.contact-band h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.14;
  letter-spacing: 0;
}

.about {
  background: #fff;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  color: #4e514f;
  font-size: 17px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 42px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.facts div {
  padding: 24px;
  background: #fbfaf7;
}

.facts strong,
.facts span {
  display: block;
}

.facts strong {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.facts span {
  font-weight: 800;
}

.usage-note {
  margin-top: 22px;
  padding: 22px 24px;
  border: 1px solid rgba(49, 93, 80, 0.22);
  border-radius: 8px;
  background: #f3f8f4;
}

.usage-note strong {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 15px;
}

.usage-note p {
  margin: 0;
  color: #4d5651;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-grid article {
  min-height: 230px;
  padding: 26px;
  border: 1px solid rgba(22, 22, 22, 0.09);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.service-index {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--coral);
  font-weight: 900;
}

.service-grid h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.service-grid p {
  margin: 0;
  color: #555957;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(360px, 1fr);
  align-items: stretch;
  background: #18251f;
}

.split-media {
  min-height: 560px;
}

.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.split-copy {
  display: grid;
  align-content: center;
  padding: clamp(48px, 7vw, 92px) clamp(24px, 6vw, 84px);
  color: #fff;
}

.split-copy h2 {
  margin-bottom: 30px;
}

.check-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: rgba(255, 255, 255, 0.82);
}

.check-list li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 3px;
  content: "✓";
  color: #f1be70;
  font-weight: 900;
}

.process {
  background: #fff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.timeline div {
  padding: 24px;
  border-left: 3px solid var(--gold);
  background: #f8f5ef;
  border-radius: 0 8px 8px 0;
}

.timeline span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--green);
  border-radius: 999px;
  font-weight: 900;
}

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

.timeline p {
  margin: 0;
  color: #5d605d;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: 34px;
  align-items: center;
  padding: clamp(58px, 7vw, 90px) clamp(18px, 4vw, 56px);
  color: #fff;
  background:
    linear-gradient(115deg, rgba(24, 37, 31, 0.96), rgba(31, 48, 43, 0.88)),
    url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80")
      center/cover;
}

.contact-band h2 {
  max-width: 860px;
  margin-bottom: 20px;
}

.contact-band p {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
}

.contact-card {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
}

.contact-card dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.contact-card div {
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.contact-card div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-card dt {
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.contact-card dd {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px clamp(18px, 4vw, 56px);
  color: #676964;
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

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

  .hero {
    min-height: auto;
  }

  .hero-visual,
  .hero-visual img,
  .split-media {
    min-height: 380px;
  }

  .service-grid,
  .facts,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: relative;
  }

  .brand-text strong {
    font-size: 14px;
  }

  .nav {
    gap: 16px;
    font-size: 13px;
  }

  h1 {
    font-size: 38px;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-actions a {
    width: 100%;
  }

  .service-grid,
  .facts,
  .timeline {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    position: static;
    width: auto;
    margin: -112px 16px 16px;
  }

  .contact-card dd {
    font-size: 16px;
  }
}