:root {
  --background: #f6f7f8;
  --foreground: #171717;
  --muted: #656b70;
  --ink: #111719;
  --panel: #ffffff;
  --line: #dde1e5;
  --gold: #d4a24a;
  --gold-dark: #9f6e24;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: Arial, "Microsoft YaHei", sans-serif;
}

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

.site-header {
  align-items: center;
  background: rgba(12, 18, 20, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #ffffff;
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(280px, 1fr) auto;
  left: 0;
  padding: 16px clamp(20px, 5vw, 76px);
  position: fixed;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand {
  color: var(--gold);
  font-size: clamp(16px, 1.45vw, 20px);
  font-weight: 800;
  line-height: 1.25;
}

nav {
  display: flex;
  gap: clamp(18px, 3vw, 38px);
  font-size: 15px;
}

nav a {
  color: rgba(255, 255, 255, 0.78);
}

nav a:hover,
nav a:focus {
  color: var(--gold);
}

.hero {
  background: #0c1112;
  color: #ffffff;
  min-height: 760px;
  overflow: hidden;
  padding: 154px clamp(20px, 6vw, 92px) 46px;
  position: relative;
}

.hero::before {
  animation: heroMotion 18s ease-in-out infinite alternate;
  background:
    linear-gradient(90deg, rgba(10, 12, 12, 0.92) 0%, rgba(10, 12, 12, 0.72) 48%, rgba(10, 12, 12, 0.18) 100%),
    url("./assets/hero-commercial.png") center / cover;
  content: "";
  inset: 0;
  position: absolute;
  transform: scale(1.04);
  transform-origin: center;
  z-index: 0;
}

.hero::after {
  animation: lightSweep 9s ease-in-out infinite;
  background: linear-gradient(115deg, transparent 0%, rgba(212, 162, 74, 0.02) 32%, rgba(212, 162, 74, 0.18) 50%, rgba(255, 255, 255, 0.06) 56%, transparent 72%);
  content: "";
  height: 160%;
  left: -45%;
  opacity: 0.8;
  position: absolute;
  top: -30%;
  transform: rotate(6deg);
  width: 42%;
  z-index: 0;
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 18px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.16;
  margin-bottom: 22px;
  max-width: 760px;
}

h2 {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.16;
  margin-bottom: 18px;
}

h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.lead {
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.9;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.primary-button,
.secondary-button {
  align-items: center;
  border-radius: 6px;
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  min-height: 54px;
  padding: 0 24px;
}

.primary-button {
  background: var(--gold);
  color: #19130b;
}

.secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.42);
  color: #ffffff;
}

.service-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 24px;
}

.service-links span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

.service-links a {
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  line-height: 1.8;
}

.service-links a:hover,
.service-links a:focus-visible {
  border-bottom-color: var(--gold);
  color: #ffffff;
}

.hero-badges {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  bottom: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  left: clamp(20px, 6vw, 92px);
  max-width: 820px;
  position: absolute;
  right: clamp(20px, 6vw, 92px);
  z-index: 1;
}

@keyframes heroMotion {
  0% {
    background-position: center center;
    transform: scale(1.04);
  }

  100% {
    background-position: 54% 46%;
    transform: scale(1.1);
  }
}

@keyframes lightSweep {
  0%,
  34% {
    left: -48%;
  }

  72%,
  100% {
    left: 112%;
  }
}

.hero-badges span {
  background: rgba(16, 22, 20, 0.72);
  color: #ffffff;
  font-size: 16px;
  font-weight: 900;
  padding: 18px 22px;
  text-align: center;
}

.intro {
  background: #ffffff;
  color: var(--foreground);
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  padding: clamp(46px, 6vw, 78px) clamp(20px, 9vw, 150px);
}

.intro-copy p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 0;
  max-width: 760px;
}

.intro-copy h2 {
  max-width: 720px;
}

.intro-stats {
  border-left: 1px solid var(--line);
  display: grid;
  gap: 16px;
  padding-left: clamp(24px, 4vw, 48px);
}

.intro-stats div {
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.intro-stats strong {
  color: var(--gold);
  display: block;
  font-size: clamp(30px, 3.5vw, 46px);
  line-height: 1;
  margin-bottom: 8px;
}

.intro-stats span {
  color: var(--muted);
  font-size: 15px;
}

.section,
.dark-section,
.contact {
  padding: clamp(58px, 7vw, 96px) clamp(20px, 6vw, 92px);
}

.section-heading {
  max-width: 780px;
}

.section-heading.wide {
  max-width: 980px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.service-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
}

.service-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 250px;
  padding: clamp(24px, 3vw, 34px);
  scroll-margin-top: 120px;
}

.service-card:target {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(216, 162, 76, 0.14);
}

.service-card span {
  color: var(--gold-dark);
  display: block;
  font-weight: 900;
  margin-bottom: 34px;
}

.service-card p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.dark-section {
  background: #111816;
  color: #ffffff;
}

.dark-section .section-heading p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.68);
}

.case-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 48px;
}

.case-feature {
  align-items: stretch;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(216, 162, 76, 0.28);
  border-radius: 8px;
  display: grid;
  gap: 0;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  margin-top: 48px;
  overflow: hidden;
}

.case-feature img {
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  width: 100%;
}

.case-feature > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 5vw, 56px);
}

.case-feature h3 {
  color: #ffffff;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.16;
}

.case-feature p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  line-height: 1.85;
}

.case-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(216, 162, 76, 0.28);
  border-radius: 8px;
  overflow: hidden;
}

.case-card img {
  aspect-ratio: 16 / 10;
  display: block;
  object-fit: cover;
  width: 100%;
}

.case-card p {
  color: var(--gold);
  font-size: 14px;
  font-weight: 900;
  margin: 22px 24px 10px;
}

.case-card h3 {
  color: #ffffff;
  font-size: 20px;
  line-height: 1.35;
  margin: 0;
  padding: 0 24px 26px;
}

.split {
  display: grid;
  gap: clamp(28px, 6vw, 96px);
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
}

.resource-list {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-list div {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.resource-list strong {
  color: var(--ink);
  display: block;
  font-size: 20px;
  margin-bottom: 14px;
}

.resource-list p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 0;
}

.contact {
  align-items: center;
  background:
    linear-gradient(90deg, rgba(16, 22, 20, 0.94), rgba(16, 22, 20, 0.76)),
    url("./assets/case-launch.jpg") center / cover;
  color: #ffffff;
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
}

.contact h2 {
  max-width: 780px;
}

.contact p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 17px;
  line-height: 1.85;
}

.contact-panel {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(216, 162, 76, 0.45);
  border-radius: 8px;
  color: var(--foreground);
  justify-self: end;
  max-width: 380px;
  padding: clamp(22px, 3vw, 30px);
  width: 100%;
}

.contact-panel span {
  color: var(--gold-dark);
  display: block;
  font-size: 14px;
  font-weight: 900;
  margin-bottom: 10px;
}

.contact-panel p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 12px 0 0;
}

.contact-phone {
  color: var(--ink);
  display: block;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  line-height: 1;
}

.site-footer {
  align-items: center;
  background: #0f1516;
  color: rgba(255, 255, 255, 0.62);
  display: flex;
  flex-wrap: wrap;
  font-size: 14px;
  gap: 12px 28px;
  justify-content: space-between;
  padding: 22px clamp(20px, 6vw, 92px);
}

.detail-hero {
  background-color: #0c1112;
  background-position: center;
  background-size: cover;
  color: #ffffff;
  min-height: 590px;
  padding: 160px clamp(20px, 8vw, 126px) 88px;
  position: relative;
}

.detail-hero::before {
  background: linear-gradient(90deg, rgba(10, 14, 15, 0.94), rgba(10, 14, 15, 0.68) 58%, rgba(10, 14, 15, 0.24));
  content: "";
  inset: 0;
  position: absolute;
}

.detail-hero.planning {
  background-image: url("./assets/hero-commercial.png");
}

.detail-hero.led-audio {
  background-image: url("./assets/case-launch.jpg");
}

.detail-hero.stage {
  background-image: url("./assets/case-open.jpg");
}

.detail-hero-content {
  max-width: 820px;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  margin-bottom: 34px;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--gold);
}

.detail-hero .lead {
  max-width: 760px;
}

.detail-section,
.detail-band,
.related-services {
  padding: clamp(58px, 7vw, 92px) clamp(20px, 8vw, 126px);
}

.detail-section {
  background: #ffffff;
  display: grid;
  gap: clamp(34px, 7vw, 100px);
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
}

.detail-copy {
  max-width: 780px;
}

.detail-copy p,
.detail-band > p,
.detail-media p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.95;
}

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

.detail-points div {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}

.detail-points strong {
  color: var(--ink);
  display: block;
  font-size: 18px;
  margin-bottom: 7px;
}

.detail-points span {
  color: var(--muted);
  line-height: 1.7;
}

.detail-band {
  background: var(--background);
}

.detail-band.dark {
  background: #111816;
  color: #ffffff;
}

.detail-band.dark > p {
  color: rgba(255, 255, 255, 0.7);
}

.scenario-grid,
.process-grid {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 42px;
}

.scenario-grid article,
.process-grid article {
  border-left: 1px solid var(--line);
  padding: 10px clamp(20px, 3vw, 38px) 10px;
}

.scenario-grid article:first-child,
.process-grid article:first-child {
  border-left: 0;
  padding-left: 0;
}

.scenario-grid h3,
.process-grid h3 {
  font-size: 20px;
  line-height: 1.45;
}

.scenario-grid p,
.process-grid p {
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 0;
}

.process-grid article {
  border-color: rgba(255, 255, 255, 0.16);
}

.process-grid span {
  color: var(--gold);
  display: block;
  font-size: 13px;
  font-weight: 900;
  margin-bottom: 18px;
}

.process-grid h3 {
  color: #ffffff;
}

.process-grid p {
  color: rgba(255, 255, 255, 0.68);
}

.detail-media {
  align-items: center;
  background: #ffffff;
  display: grid;
  gap: clamp(32px, 6vw, 82px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  padding: clamp(58px, 7vw, 92px) clamp(20px, 8vw, 126px);
}

.detail-media img {
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  object-fit: cover;
  width: 100%;
}

.related-services {
  background: #eef0f1;
}

.related-links {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 32px;
}

.related-links a {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
  padding: 24px;
}

.related-links a:hover,
.related-links a:focus-visible {
  border-color: var(--gold);
  color: var(--gold-dark);
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr;
    position: absolute;
  }

  nav {
    flex-wrap: wrap;
  }

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

  .hero {
    min-height: auto;
    padding-top: 220px;
  }

  .hero-badges,
  .intro,
  .service-grid,
  .case-feature,
  .case-grid,
  .split,
  .resource-list,
  .contact,
  .detail-section,
  .detail-media,
  .scenario-grid,
  .process-grid,
  .related-links {
    grid-template-columns: 1fr;
  }

  .scenario-grid article,
  .process-grid article,
  .scenario-grid article:first-child,
  .process-grid article:first-child {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 26px 0;
  }

  .process-grid article,
  .process-grid article:first-child {
    border-color: rgba(255, 255, 255, 0.16);
  }

  .hero-badges {
    margin-top: 46px;
    position: relative;
    left: auto;
    right: auto;
  }

  .intro-stats {
    border-left: 0;
    border-top: 1px solid rgba(216, 162, 76, 0.32);
    padding-left: 0;
    padding-top: 24px;
  }

  .contact-panel {
    justify-self: stretch;
  }
}

@media (max-width: 620px) {
  h1 {
    font-size: 34px;
  }

  .hero {
    padding-top: 210px;
  }

  .detail-hero {
    min-height: auto;
    padding-top: 210px;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .service-links {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .contact-phone {
    font-size: 28px;
  }
}