:root {
  --ink: #101923;
  --muted: #63706e;
  --deep: #082d2b;
  --green: #0c5c54;
  --teal: #2b7f75;
  --gold: #cda14e;
  --gold-soft: #f2dbad;
  --paper: #f6efe1;
  --cream: #fbf8f1;
  --line: rgba(16, 25, 35, 0.12);
  --shadow: 0 24px 70px rgba(6, 20, 22, 0.16);
  --radius: 8px;
  --header-h: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

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

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 80;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), #fff2c4);
  transform-origin: left center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(251, 248, 241, 0.82);
  border-bottom: 1px solid rgba(16, 25, 35, 0.08);
  backdrop-filter: blur(18px);
}

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

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(8, 45, 43, 0.22);
}

.brand span {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: clamp(15px, 1.7vw, 18px);
  letter-spacing: 0;
  white-space: nowrap;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 26px);
  color: #273331;
  font-size: 14px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms ease;
}

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

.site-nav .nav-cta {
  min-height: 42px;
  padding: 0 16px;
  color: #fff6df;
  background: var(--deep);
  border-radius: var(--radius);
}

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

.nav-toggle {
  display: none;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--deep);
  border: 0;
  border-radius: var(--radius);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: #fff4d8;
  transition: transform 180ms ease, opacity 180ms ease;
}

.hero {
  position: relative;
  min-height: min(760px, calc(100svh - var(--header-h) - 32px));
  overflow: hidden;
  isolation: isolate;
  display: grid;
  align-items: center;
  padding: clamp(38px, 5vw, 74px) clamp(18px, 5vw, 72px);
  color: #fff7e6;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
}

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

.hero-shade {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(4, 19, 21, 0.94) 0%, rgba(5, 25, 26, 0.84) 48%, rgba(6, 28, 31, 0.38) 100%),
    linear-gradient(0deg, rgba(4, 19, 21, 0.45), rgba(4, 19, 21, 0.06));
}

.hero-content {
  max-width: 780px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(40px, 5.7vw, 72px);
  line-height: 1.04;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.hero-lead {
  max-width: 660px;
  margin: 20px 0 0;
  color: rgba(255, 247, 230, 0.86);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.22);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

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

.button.primary {
  color: #13201f;
  background: var(--gold);
  border-color: var(--gold);
  font-weight: 700;
}

.button.ghost {
  color: #fff7e6;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.hero-metrics {
  position: absolute;
  left: clamp(18px, 5vw, 72px);
  bottom: clamp(18px, 3vw, 32px);
  width: min(760px, calc(100% - 36px));
  display: grid;
  grid-template-columns: repeat(4, minmax(118px, 1fr));
  gap: 1px;
  max-width: 760px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.hero-metrics div {
  padding: 18px;
  background: rgba(6, 31, 32, 0.38);
}

.hero-metrics dt {
  color: #fff5d5;
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800;
  line-height: 1;
}

.hero-metrics dd {
  margin: 8px 0 0;
  color: rgba(255, 249, 235, 0.75);
  font-size: 13px;
}

.hero-card {
  position: absolute;
  right: clamp(18px, 5vw, 72px);
  bottom: clamp(24px, 5vw, 64px);
  width: min(360px, calc(100% - 36px));
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: rgba(8, 45, 43, 0.7);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(16px);
}

.hero-card p {
  margin: 0 0 12px;
  color: var(--gold-soft);
  font-weight: 800;
}

.hero-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: rgba(255, 247, 230, 0.86);
}

.hero-card li {
  display: flex;
  gap: 10px;
}

.hero-card li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 10px;
  flex: 0 0 auto;
  background: var(--gold);
  border-radius: 99px;
}

.section {
  padding: clamp(72px, 10vw, 132px) clamp(18px, 5vw, 72px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(260px, 0.7fr);
  gap: clamp(26px, 6vw, 96px);
  align-items: end;
  max-width: 1220px;
  margin: 0 auto 42px;
}

.section-heading.compact {
  grid-template-columns: 1fr;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2,
.contact-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(31px, 5vw, 56px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.8vw, 19px);
}

.about {
  background: linear-gradient(180deg, var(--cream), #eef4ef);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 0.75fr);
  gap: 22px;
  max-width: 1220px;
  margin: 0 auto;
}

.about-story,
.credential-panel,
.service-card,
.advantage-lead,
.advantage-item,
.process-steps li,
.insight-card,
.contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 252, 245, 0.78);
  box-shadow: var(--shadow);
}

.about-story {
  padding: clamp(26px, 4vw, 48px);
}

.about-story h3,
.credential-panel strong,
.service-card h3,
.advantage-lead h3,
.advantage-item h3,
.process-steps h3,
.insight-card h3,
.case-copy h3 {
  margin: 0;
  letter-spacing: 0;
}

.about-story h3 {
  font-size: 25px;
}

.about-story p {
  margin: 18px 0 0;
  color: #4e5a58;
  font-size: 17px;
}

.credential-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  padding: clamp(26px, 4vw, 42px);
  color: #fff6df;
  background: linear-gradient(145deg, #0a3a37, #112a3b);
}

.panel-label {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 6px 10px;
  color: #102421;
  background: var(--gold);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.credential-panel strong {
  display: block;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.16;
}

.credential-panel p {
  margin: 18px 0 0;
  color: rgba(255, 247, 230, 0.76);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gold-soft);
  font-weight: 700;
}

.text-link svg,
.insight-card a svg {
  width: 16px;
  height: 16px;
}

.services {
  background: #f7f3ea;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1220px;
  margin: 0 auto;
}

.service-card {
  min-height: 250px;
  padding: 26px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(205, 161, 78, 0.45);
  box-shadow: 0 28px 80px rgba(6, 20, 22, 0.18);
}

.service-card svg {
  width: 34px;
  height: 34px;
  color: var(--green);
  stroke-width: 1.7;
}

.service-card h3 {
  margin-top: 28px;
  font-size: 21px;
}

.service-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.advantages {
  color: #fff7e6;
  background: #0b2f2d;
}

.advantages .section-heading h2,
.advantages .section-heading p {
  color: inherit;
}

.advantages .section-heading p,
.advantage-lead p,
.advantage-item p {
  color: rgba(255, 247, 230, 0.72);
}

.advantage-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1.2fr);
  gap: 18px;
  max-width: 1220px;
  margin: 0 auto;
}

.advantage-lead {
  min-height: 100%;
  padding: clamp(28px, 4vw, 46px);
  color: #fff7e6;
  background: linear-gradient(160deg, rgba(205, 161, 78, 0.24), rgba(19, 73, 70, 0.92));
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: none;
}

.advantage-lead span {
  color: var(--gold);
  font-size: 15px;
  font-weight: 800;
}

.advantage-lead h3 {
  margin-top: 78px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
}

.advantage-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.advantage-item {
  display: flex;
  gap: 18px;
  min-height: 190px;
  padding: 24px;
  color: #fff7e6;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow: none;
}

.advantage-item svg {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  color: var(--gold);
}

.advantage-item h3 {
  font-size: 21px;
}

.advantage-item p,
.advantage-lead p {
  margin: 12px 0 0;
}

.process {
  background: #eef4ef;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.process-steps li {
  position: relative;
  min-height: 220px;
  padding: 24px;
  box-shadow: none;
}

.process-steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: #fff8df;
  background: var(--deep);
  border-radius: 999px;
  font-weight: 800;
}

.process-steps h3 {
  margin-top: 34px;
  font-size: 21px;
}

.process-steps p {
  margin: 10px 0 0;
  color: var(--muted);
}

.cases {
  background: #fbf8f1;
}

.case-carousel {
  position: relative;
  max-width: 1220px;
  margin: 0 auto;
}

.case-track {
  position: relative;
  min-height: clamp(520px, 62vw, 720px);
  overflow: hidden;
  border-radius: var(--radius);
  background: #102421;
  box-shadow: 0 28px 90px rgba(7, 26, 29, 0.23);
}

.case-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  opacity: 0;
  transform: translateX(28px);
  transition: opacity 420ms ease, transform 420ms ease;
  pointer-events: none;
}

.case-slide.is-active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.case-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  padding: clamp(12px, 2vw, 28px);
  background: #eef1eb;
}

.case-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 5vw, 60px);
  color: #fff7e6;
  background: linear-gradient(160deg, #092d2b, #162a38);
}

.case-copy span {
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-copy h3 {
  margin-top: 20px;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.13;
}

.case-copy p {
  margin: 18px 0 0;
  color: rgba(255, 247, 230, 0.75);
  font-size: 17px;
}

.carousel-controls {
  position: absolute;
  right: 24px;
  bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(5, 25, 26, 0.72);
  backdrop-filter: blur(16px);
}

.carousel-controls button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  color: #fff7e6;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  cursor: pointer;
}

.carousel-controls svg {
  width: 20px;
  height: 20px;
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 7px;
}

.carousel-dots button {
  width: 30px;
  height: 4px;
  min-height: 0;
  border: 0;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.28);
}

.carousel-dots button.is-active {
  background: var(--gold);
}

.insights {
  background: #f7f3ea;
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 1220px;
  margin: 0 auto;
}

.insight-card {
  min-height: 310px;
  padding: 28px;
  box-shadow: none;
}

.insight-card span {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.insight-card h3 {
  margin-top: 28px;
  font-size: clamp(22px, 2.7vw, 30px);
  line-height: 1.24;
}

.insight-card p {
  margin: 14px 0 0;
  color: var(--muted);
}

.insight-card a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 26px;
  color: var(--green);
  font-weight: 800;
}

.contact-section {
  padding: clamp(72px, 10vw, 126px) clamp(18px, 5vw, 72px);
  background: #0b2f2d;
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(300px, 0.8fr);
  gap: clamp(26px, 6vw, 88px);
  max-width: 1220px;
  margin: 0 auto;
}

.contact-copy h2,
.contact-copy p {
  color: #fff7e6;
}

.contact-copy p {
  margin-top: 22px;
  color: rgba(255, 247, 230, 0.72);
}

.contact-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  color: #fff7e6;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow: none;
}

.contact-row {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  align-items: center;
  min-height: 82px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(7, 35, 36, 0.45);
}

.contact-row svg {
  width: 24px;
  height: 24px;
  color: var(--gold);
}

.contact-row small {
  display: block;
  color: rgba(255, 247, 230, 0.62);
  font-size: 13px;
}

.contact-row strong {
  display: block;
  margin-top: 2px;
  word-break: break-word;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(18px, 5vw, 72px);
  color: rgba(255, 247, 230, 0.8);
  background: #071f1f;
}

.site-footer strong {
  color: #fff7e6;
}

.site-footer p {
  max-width: 690px;
  margin: 6px 0 0;
  font-size: 13px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}

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

@media (max-width: 1400px) {
  .hero-card {
    display: none;
  }
}

@media (max-width: 1120px) {
  .site-nav {
    gap: 14px;
    font-size: 13px;
  }

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

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

  .hero-card {
    display: none;
  }
}

@media (max-width: 860px) {
  :root {
    --header-h: 68px;
  }

  .site-header {
    min-height: var(--header-h);
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .brand small {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 14px;
    left: 14px;
    display: grid;
    gap: 4px;
    padding: 16px;
    background: rgba(251, 248, 241, 0.97);
    border: 1px solid rgba(16, 25, 35, 0.1);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transform: translateY(-14px);
    opacity: 0;
    pointer-events: none;
    transition: transform 180ms ease, opacity 180ms ease;
  }

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

  .site-nav a,
  .site-nav .nav-cta {
    justify-content: center;
    min-height: 46px;
  }

  .nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
    padding-bottom: 36px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(36px, 10vw, 48px);
  }

  .hero-metrics {
    position: static;
    width: auto;
    max-width: none;
    margin: 32px 0 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-card {
    display: none;
  }

  .section-heading,
  .about-grid,
  .advantage-layout,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: start;
  }

  .advantage-list,
  .insight-grid {
    grid-template-columns: 1fr;
  }

  .case-slide {
    grid-template-columns: 1fr;
    grid-template-rows: 300px auto;
    align-content: start;
  }

  .case-slide img {
    height: 300px;
  }

  .case-track {
    min-height: 650px;
  }

  .case-copy {
    justify-content: flex-start;
  }

  .carousel-controls {
    right: 14px;
    bottom: 14px;
  }

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

@media (max-width: 620px) {
  .site-header {
    padding-inline: 14px;
  }

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

  .hero,
  .section,
  .contact-section {
    padding-inline: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .hero-metrics {
    grid-template-columns: 1fr 1fr;
  }

  .hero-metrics div {
    padding: 16px 14px;
  }

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

  .service-card,
  .process-steps li,
  .insight-card {
    min-height: auto;
  }

  .case-slide img {
    height: 250px;
  }

  .case-slide {
    grid-template-rows: 250px auto;
  }

  .case-track {
    min-height: 640px;
  }

  .case-copy {
    padding: 26px;
  }

  .case-copy h3 {
    font-size: 29px;
  }

  .carousel-controls {
    position: static;
    justify-content: center;
    margin-top: 14px;
    background: #0b2f2d;
  }
}

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