:root {
  --ink: #0e2224;
  --ink-2: #173638;
  --pine: #244841;
  --moss: #4c6f63;
  --paper: #fffaf0;
  --porcelain: #f7f4ed;
  --warm: #e9dfcc;
  --line: #d8cfbc;
  --brass: #bc803e;
  --oxide: #9a4d32;
  --blue: #255fa4;
  --cyan: #4d9fb0;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(14, 34, 36, 0.16);
  --radius: 8px;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--porcelain);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  transform: translateY(-160%);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem clamp(1rem, 4vw, 4.5rem);
  border-bottom: 1px solid rgba(255, 250, 240, 0.12);
  background: rgba(9, 24, 25, 0.58);
  color: var(--paper);
  backdrop-filter: blur(16px);
  transition: background 220ms ease, color 220ms ease, box-shadow 220ms ease, padding 220ms ease;
}

.site-header.is-scrolled,
.site-header.nav-active {
  background: rgba(255, 250, 240, 0.94);
  color: var(--ink);
  box-shadow: 0 10px 40px rgba(14, 34, 36, 0.1);
  backdrop-filter: blur(18px);
  padding-block: 0.7rem;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.25;
}

.brand strong {
  max-width: 18rem;
  overflow-wrap: anywhere;
  font-size: clamp(0.95rem, 1.25vw, 1.12rem);
}

.brand small {
  margin-top: 0.2rem;
  color: currentColor;
  font-size: 0.74rem;
  font-weight: 500;
  opacity: 0.72;
}

.brand__mark {
  position: relative;
  display: grid;
  width: 2.85rem;
  height: 2.85rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(255, 250, 240, 0.52);
  background: rgba(14, 34, 36, 0.56);
  overflow: hidden;
}

.site-header.is-scrolled .brand__mark,
.site-header.nav-active .brand__mark {
  border-color: rgba(14, 34, 36, 0.2);
  background: var(--ink);
}

.brand__mark::before {
  content: "鲁";
  position: relative;
  z-index: 2;
  color: var(--paper);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 800;
}

.brand__mark span {
  position: absolute;
  width: 72%;
  height: 2px;
  background: var(--brass);
  transform: rotate(-32deg);
}

.brand__mark span:first-child {
  top: 0.72rem;
  left: -0.25rem;
}

.brand__mark span:last-child {
  bottom: 0.75rem;
  right: -0.35rem;
}

.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.8rem);
}

.site-nav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: currentColor;
  font-size: 0.95rem;
  font-weight: 650;
  opacity: 0.84;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.42rem;
  height: 2px;
  background: var(--brass);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  opacity: 1;
}

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

.header-call {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font-weight: 800;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.header-call:hover {
  border-color: var(--brass);
  background: var(--brass);
  color: var(--ink);
}

.menu-button {
  display: none;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: transparent;
  color: currentColor;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}

.menu-button__icon,
.menu-button__icon::before,
.menu-button__icon::after {
  display: block;
  width: 1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.menu-button__icon {
  position: relative;
}

.menu-button__icon::before,
.menu-button__icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-button__icon::before {
  top: -0.34rem;
}

.menu-button__icon::after {
  top: 0.34rem;
}

.hero {
  position: relative;
  min-height: min(900px, 90dvh);
  display: grid;
  align-items: center;
  padding: clamp(7rem, 14vh, 10rem) clamp(1.25rem, 6vw, 6rem) clamp(6rem, 10vh, 8rem);
  color: var(--paper);
  overflow: hidden;
}

.hero__image,
.hero__shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__image {
  object-fit: cover;
  object-position: center;
}

.hero__shade {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(6, 21, 22, 0.72), rgba(6, 21, 22, 0.26) 46%, rgba(255, 250, 240, 0.02)),
    linear-gradient(0deg, rgba(6, 21, 22, 0.68), rgba(6, 21, 22, 0) 42%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 790px;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--oxide);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0;
}

.hero .eyebrow,
.capability .eyebrow,
.contact .eyebrow {
  color: #d3944d;
}

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

h1,
h2 {
  font-family: var(--serif);
  line-height: 1.14;
  letter-spacing: 0;
}

h1 {
  max-width: 8.4em;
  margin-bottom: 1.15rem;
  font-size: clamp(2.65rem, 7vw, 5.8rem);
  font-weight: 900;
}

.hero__lead {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: rgba(255, 250, 240, 0.88);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
}

.hero__actions,
.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.78rem 1.15rem;
  cursor: pointer;
  font-weight: 850;
  line-height: 1.2;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button svg {
  width: 1.15rem;
  height: 1.15rem;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

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

.button--primary {
  background: var(--brass);
  color: #101c1b;
  box-shadow: 0 15px 38px rgba(188, 128, 62, 0.25);
}

.button--primary:hover {
  background: #d19448;
}

.button--ghost {
  border-color: rgba(255, 250, 240, 0.56);
  color: var(--paper);
  background: rgba(255, 250, 240, 0.08);
}

.button--ghost:hover {
  border-color: var(--paper);
  background: rgba(255, 250, 240, 0.18);
}

.hero__facts {
  position: absolute;
  z-index: 2;
  left: clamp(1.25rem, 6vw, 6rem);
  right: clamp(1.25rem, 6vw, 6rem);
  bottom: clamp(1rem, 3vh, 2.2rem);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(255, 250, 240, 0.28);
  list-style: none;
}

.hero__facts li {
  min-width: 0;
  padding-right: 1rem;
}

.hero__facts strong {
  display: block;
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 2.3rem);
  line-height: 1;
}

.hero__facts span {
  color: rgba(255, 250, 240, 0.78);
  font-size: 0.9rem;
}

.intro-strip {
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.intro-strip__inner {
  display: flex;
  width: max-content;
  min-width: 100%;
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  padding: 1rem clamp(1rem, 6vw, 6rem);
  color: rgba(255, 250, 240, 0.78);
  font-weight: 750;
  white-space: nowrap;
}

.intro-strip__inner span {
  position: relative;
}

.intro-strip__inner span::before {
  content: "";
  display: inline-block;
  width: 0.48rem;
  height: 0.48rem;
  margin-right: 0.75rem;
  border-radius: 50%;
  background: var(--brass);
  vertical-align: 0.08rem;
}

.section {
  padding: clamp(4.5rem, 9vw, 8rem) clamp(1.25rem, 6vw, 6rem);
}

.section__header {
  max-width: 860px;
  margin-bottom: clamp(2rem, 5vw, 3.8rem);
}

.section__header h2,
.contact h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4.6vw, 4.4rem);
  font-weight: 900;
}

.section__header p:not(.eyebrow) {
  max-width: 46rem;
  color: rgba(14, 34, 36, 0.76);
  font-size: 1.05rem;
}

.about {
  background:
    linear-gradient(90deg, rgba(216, 207, 188, 0.28) 1px, transparent 1px),
    linear-gradient(0deg, rgba(216, 207, 188, 0.28) 1px, transparent 1px),
    var(--porcelain);
  background-size: 56px 56px;
}

.about__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.about__copy {
  max-width: 58rem;
  color: rgba(14, 34, 36, 0.8);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
}

.about__copy p {
  margin-bottom: 1.2rem;
}

.about__ledger {
  border-left: 2px solid var(--ink);
  background: rgba(255, 250, 240, 0.6);
}

.about__ledger div {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0 1.1rem 1.4rem;
}

.about__ledger div:last-child {
  border-bottom: 0;
}

.about__ledger span {
  color: var(--oxide);
  font-size: 0.88rem;
  font-weight: 850;
}

.about__ledger strong {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
}

.services {
  background: var(--paper);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

.service-card {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--porcelain);
  box-shadow: var(--shadow);
}

.service-card picture,
.service-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
}

.service-card picture {
  display: block;
  overflow: hidden;
}

.service-card img {
  object-fit: cover;
}

.service-card__body {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 2.2rem);
}

.service-card__label {
  width: fit-content;
  margin-bottom: 0.95rem;
  border-bottom: 2px solid var(--brass);
  color: var(--oxide);
  font-size: 0.86rem;
  font-weight: 900;
}

.service-card h3 {
  margin-bottom: 0.8rem;
  font-family: var(--serif);
  font-size: clamp(1.55rem, 2.6vw, 2.35rem);
  line-height: 1.22;
  overflow-wrap: anywhere;
}

.service-card p {
  color: rgba(14, 34, 36, 0.72);
  overflow-wrap: anywhere;
}

.service-card--dark {
  background: var(--ink);
  color: var(--paper);
}

.service-card--dark .service-card__label {
  color: #d3944d;
}

.service-card--dark p {
  color: rgba(255, 250, 240, 0.76);
}

.check-list {
  display: grid;
  gap: 0.7rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
  overflow-wrap: anywhere;
}

.check-list li {
  position: relative;
  padding-left: 1.75rem;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.54rem;
  width: 0.78rem;
  height: 0.42rem;
  border-bottom: 2px solid var(--brass);
  border-left: 2px solid var(--brass);
  transform: rotate(-45deg);
}

.capability {
  background: var(--ink);
  color: var(--paper);
}

.capability .section__header p:not(.eyebrow) {
  color: rgba(255, 250, 240, 0.76);
}

.capability__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 250, 240, 0.18);
  border-left: 1px solid rgba(255, 250, 240, 0.18);
}

.capability-item {
  min-height: 265px;
  border-right: 1px solid rgba(255, 250, 240, 0.18);
  border-bottom: 1px solid rgba(255, 250, 240, 0.18);
  padding: clamp(1.2rem, 2.6vw, 2rem);
  transition: background 180ms ease, transform 180ms ease;
}

.capability-item:hover {
  background: rgba(255, 250, 240, 0.06);
}

.number {
  display: block;
  margin-bottom: 3rem;
  color: var(--brass);
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 900;
}

.capability-item h3,
.process-list h3 {
  margin-bottom: 0.6rem;
  font-size: 1.35rem;
}

.capability-item p {
  color: rgba(255, 250, 240, 0.72);
}

.process {
  background: var(--porcelain);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.process-list li {
  position: relative;
  min-height: 280px;
  border-right: 1px solid var(--line);
  padding: clamp(1.1rem, 2.4vw, 1.8rem);
}

.process-list li:first-child {
  border-left: 1px solid var(--line);
}

.process-list span {
  display: block;
  margin-bottom: 3.5rem;
  color: var(--oxide);
  font-family: var(--serif);
  font-size: 2.15rem;
  font-weight: 900;
}

.process-list p {
  color: rgba(14, 34, 36, 0.72);
}

.industries {
  background: var(--paper);
}

.industry-band {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-block: 1px solid var(--ink);
}

.industry-band span {
  display: grid;
  min-height: 136px;
  place-items: center;
  border-right: 1px solid var(--line);
  padding: 1rem;
  text-align: center;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 850;
}

.industry-band span:last-child {
  border-right: 0;
}

.coverage {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  background: var(--porcelain);
}

.coverage__details {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.coverage__details div {
  border-left: 3px solid var(--brass);
  padding-left: 1rem;
}

.coverage__details span {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--oxide);
  font-weight: 900;
}

.coverage__details p {
  margin-bottom: 0;
  color: rgba(14, 34, 36, 0.78);
}

.coverage__map {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

.contact {
  padding: clamp(4.5rem, 9vw, 8rem) clamp(1.25rem, 6vw, 6rem);
  background:
    radial-gradient(circle at 18% 0%, rgba(188, 128, 62, 0.16), transparent 30rem),
    linear-gradient(135deg, var(--ink), #17312e);
  color: var(--paper);
}

.contact__panel {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.contact__copy p:not(.eyebrow) {
  max-width: 38rem;
  color: rgba(255, 250, 240, 0.74);
}

.contact-phone {
  display: inline-flex;
  margin: 0.35rem 0 1.25rem;
  color: var(--brass);
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  font-weight: 900;
  line-height: 1;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  border: 1px solid rgba(255, 250, 240, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.07);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field--full {
  grid-column: 1 / -1;
}

label {
  color: rgba(255, 250, 240, 0.84);
  font-size: 0.9rem;
  font-weight: 800;
}

input,
textarea,
select {
  width: 100%;
  min-height: 48px;
  border: 1px solid rgba(255, 250, 240, 0.28);
  border-radius: 6px;
  background: rgba(255, 250, 240, 0.96);
  color: var(--ink);
  padding: 0.78rem 0.85rem;
}

textarea {
  min-height: 128px;
  resize: vertical;
}

.form-status {
  min-height: 1.5rem;
  margin: 0;
  color: var(--brass);
  font-weight: 850;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1.25rem, 6vw, 6rem);
  background: #091819;
  color: rgba(255, 250, 240, 0.8);
}

.site-footer strong {
  color: var(--paper);
}

.site-footer p,
.site-footer span {
  margin: 0;
  font-size: 0.92rem;
}

.site-footer a {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--brass);
  font-weight: 900;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: auto auto 1fr;
  }

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

  .site-nav {
    position: fixed;
    inset: 4.8rem 1rem auto 1rem;
    z-index: 99;
    display: grid;
    justify-self: stretch;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper);
    color: var(--ink);
    padding: 0.45rem;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

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

  .site-nav a {
    min-height: 52px;
    border-bottom: 1px solid rgba(216, 207, 188, 0.78);
    padding: 0 0.75rem;
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

  .site-nav a::after {
    display: none;
  }

  .header-call {
    justify-self: end;
  }

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

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

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

@media (max-width: 860px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .header-call {
    display: none;
  }

  .brand strong {
    max-width: min(58vw, 18rem);
  }

  .hero {
    min-height: 88dvh;
    padding-top: 7.2rem;
    padding-bottom: 11rem;
  }

  .hero__image {
    object-position: 58% center;
  }

  .hero__shade {
    background:
      linear-gradient(90deg, rgba(6, 21, 22, 0.86), rgba(6, 21, 22, 0.48)),
      linear-gradient(0deg, rgba(6, 21, 22, 0.76), rgba(6, 21, 22, 0.04) 56%);
  }

  .hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 1rem;
  }

  .intro-strip__inner {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    white-space: normal;
  }

  .about__layout,
  .service-grid,
  .coverage,
  .contact__panel {
    grid-template-columns: 1fr;
  }

  .coverage__map {
    order: -1;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .brand__mark {
    width: 2.5rem;
    height: 2.5rem;
  }

  .brand small {
    display: none;
  }

  .hero__actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .capability__grid,
  .process-list,
  .industry-band {
    grid-template-columns: 1fr;
  }

  .process-list li,
  .capability-item {
    min-height: auto;
  }

  .number,
  .process-list span {
    margin-bottom: 1.5rem;
  }

  .site-footer {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}