:root {
  color-scheme: light;
  --ink: #192024;
  --muted: #5b6770;
  --paper: #f7f8f4;
  --surface: #ffffff;
  --line: rgba(25, 32, 36, 0.12);
  --green: #23705a;
  --green-dark: #174d40;
  --coral: #d76e4a;
  --gold: #d6ad55;
  --blue: #426f8f;
  --shadow: 0 24px 80px rgba(24, 41, 45, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 clamp(18px, 4vw, 64px);
  color: #fff;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(14px);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--coral), var(--green));
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(35, 112, 90, 0.3);
}

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

.brand strong {
  font-size: 16px;
  line-height: 1.2;
}

.brand small {
  margin-top: 3px;
  font-size: 11px;
  opacity: 0.75;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  font-size: 14px;
  font-weight: 600;
}

.desktop-nav a {
  position: relative;
}

.desktop-nav a::after {
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.18s ease;
  content: "";
}

.desktop-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: inherit;
  background: transparent;
  cursor: pointer;
}

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

.mobile-nav {
  position: fixed;
  top: 72px;
  left: 16px;
  right: 16px;
  z-index: 19;
  display: none;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow);
}

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

.mobile-nav a {
  padding: 13px 10px;
  color: var(--ink);
  font-weight: 700;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: #15201d;
}

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

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

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(12, 21, 21, 0.88), rgba(13, 29, 33, 0.58) 52%, rgba(13, 29, 33, 0.2)),
    linear-gradient(0deg, rgba(8, 12, 12, 0.55), rgba(8, 12, 12, 0.02) 44%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100% - 36px));
  margin: 0 auto;
  padding: 168px 0 84px;
}

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

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(40px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2.2vw, 22px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    background 0.16s ease;
}

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

.button.primary {
  color: #fff;
  background: var(--coral);
  box-shadow: 0 16px 38px rgba(215, 110, 74, 0.28);
}

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.48);
  background: rgba(255, 255, 255, 0.08);
}

.button.full {
  width: 100%;
  margin-top: 26px;
}

.section {
  padding: clamp(68px, 9vw, 116px) 0;
}

.section-inner {
  width: min(1160px, calc(100% - 36px));
  margin: 0 auto;
}

.intro-band {
  padding: clamp(46px, 7vw, 72px) 0;
  background: #fff;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.intro-grid h2,
.section-heading h2,
.profile-panel h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

.intro-grid p:last-child {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.align-left {
  margin: 0;
  text-align: left;
}

.section-heading p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

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

.service-card {
  min-height: 282px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(24, 41, 45, 0.07);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  color: #fff;
  background: var(--green);
  font-size: 14px;
  font-weight: 900;
}

.service-card:nth-child(2) .card-icon {
  background: var(--coral);
}

.service-card:nth-child(3) .card-icon {
  background: var(--blue);
}

.service-card:nth-child(4) .card-icon {
  background: var(--gold);
}

.service-card h3,
.timeline-item h3,
.scope-panel h3 {
  margin: 22px 0 10px;
  font-size: 20px;
  line-height: 1.25;
}

.service-card p,
.timeline-item p,
.scope-panel p {
  margin: 0;
  color: var(--muted);
}

.process-section {
  background: #ffffff;
}

.process-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(32px, 7vw, 86px);
  align-items: center;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf6;
}

.timeline-item span {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  color: #fff;
  background: var(--green-dark);
  font-weight: 900;
}

.timeline-item h3 {
  margin: 0 0 6px;
}

.profile-section {
  background:
    linear-gradient(135deg, rgba(35, 112, 90, 0.1), rgba(215, 110, 74, 0.09)),
    var(--paper);
}

.profile-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.82fr);
  gap: 22px;
}

.profile-panel,
.scope-panel,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 20px 60px rgba(24, 41, 45, 0.08);
}

.profile-panel {
  padding: clamp(28px, 5vw, 48px);
}

.scope-panel {
  padding: clamp(28px, 5vw, 42px);
}

.scope-panel h3 {
  margin-top: 0;
}

.scope-panel p + p {
  margin-top: 18px;
}

.info-list {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
}

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

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

.info-list dd {
  margin: 0;
  font-weight: 800;
}

.contact-section {
  padding: clamp(72px, 9vw, 108px) 0;
  color: #fff;
  background: #17382f;
}

.contact-section .section-kicker {
  color: #f0c96e;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 390px);
  gap: clamp(28px, 7vw, 84px);
  align-items: center;
}

.contact-layout p {
  max-width: 700px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.contact-card {
  padding: 28px;
  color: var(--ink);
  background: #fff;
}

.contact-card p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
}

.contact-card strong {
  display: block;
  font-size: 19px;
  line-height: 1.45;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(18px, 4vw, 64px);
  color: #dce6df;
  background: #10231f;
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer span,
.site-footer a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

@media (max-width: 980px) {
  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-layout,
  .profile-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 66px;
    padding: 0 16px;
  }

  .brand small {
    display: none;
  }

  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .mobile-nav {
    top: 66px;
  }

  .hero {
    min-height: 88vh;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(12, 21, 21, 0.9), rgba(13, 29, 33, 0.62)),
      linear-gradient(0deg, rgba(8, 12, 12, 0.58), rgba(8, 12, 12, 0.05) 45%);
  }

  .hero-content {
    width: min(100% - 32px, 720px);
    padding: 128px 0 54px;
  }

  .hero h1 {
    font-size: clamp(36px, 12vw, 58px);
  }

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

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

  .service-card {
    min-height: auto;
  }

  .timeline-item {
    grid-template-columns: 44px minmax(0, 1fr);
    padding: 18px;
  }

  .timeline-item span {
    width: 44px;
    height: 44px;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 5px;
  }

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