/* ========================================
   得亿广告 · 企业官网
   黑金专业体系 · Black / Gold / Crimson
   ======================================== */

:root {
  --bg: #0b0b0c;
  --bg-elevated: #121214;
  --bg-soft: #17171a;
  --bg-alt: #0f0f11;
  --ink: #f3efe6;
  --ink-muted: #a39e93;
  --ink-dim: #6f6a61;
  --gold: #c9a45c;
  --gold-bright: #e0c07a;
  --gold-deep: #8f6f32;
  --gold-line: rgba(201, 164, 92, 0.35);
  --crimson: #b91c2c;
  --line: rgba(255, 255, 255, 0.08);
  --shade: rgba(0, 0, 0, 0.55);
  --radius: 2px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Cormorant Garamond", Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 自定义滚动条 · 黑金风格 */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--gold-deep) #141414;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #0e0e0f;
  border-left: 1px solid rgba(201, 164, 92, 0.12);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--gold-bright), var(--gold-deep));
  border: 2px solid #0e0e0f;
  border-radius: 999px;
  min-height: 48px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #edd29a, var(--gold));
}

::-webkit-scrollbar-corner {
  background: #0e0e0f;
}

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

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul,
dl {
  list-style: none;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 9998;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.section {
  padding: 112px 0;
}

.eyebrow {
  font-family: var(--font-en);
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
  margin-bottom: 20px;
}

.section-desc {
  color: var(--ink-muted);
  max-width: 36em;
  font-size: 1.02rem;
}

.section-head {
  margin-bottom: 56px;
  max-width: 720px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  font-size: 0.92rem;
  letter-spacing: 0.12em;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease), transform 0.35s var(--ease);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-bright), var(--gold), var(--gold-deep));
  color: #1a1408;
  font-weight: 500;
}

.btn-gold:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
}

.btn-ghost {
  border: 1px solid var(--gold-line);
  color: var(--gold-bright);
}

.btn-ghost:hover {
  border-color: var(--gold);
  background: rgba(201, 164, 92, 0.08);
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(11, 11, 12, 0.88);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}

.header-inner {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.logo-img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border: 1px solid var(--gold-line);
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-text strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.logo-text em {
  font-family: var(--font-en);
  font-style: normal;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 0.88rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  position: relative;
  transition: color 0.25s;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s var(--ease);
}

.nav a:hover,
.nav a.is-active {
  color: var(--ink);
}

.nav a:hover::after,
.nav a.is-active::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 18px;
  border: 1px solid var(--gold-line);
  color: var(--gold-bright) !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: rgba(201, 164, 92, 0.1);
  border-color: var(--gold);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  gap: 7px;
  flex-direction: column;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  padding: calc(var(--header-h) + 48px) 0 72px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #0a0a0b;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(165deg, #12110f 0%, #0a0a0b 42%, #0d0c0a 100%),
    radial-gradient(ellipse 70% 55% at 78% 18%, rgba(201, 164, 92, 0.22), transparent 58%),
    radial-gradient(ellipse 50% 45% at 12% 82%, rgba(185, 28, 44, 0.12), transparent 55%),
    radial-gradient(ellipse 40% 35% at 48% 48%, rgba(224, 192, 122, 0.06), transparent 60%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
  animation: orbFloat 14s ease-in-out infinite;
}

.hero-orb-a {
  width: 42vw;
  height: 42vw;
  max-width: 560px;
  max-height: 560px;
  top: -12%;
  right: -6%;
  background: radial-gradient(circle, rgba(201, 164, 92, 0.28) 0%, rgba(201, 164, 92, 0.05) 45%, transparent 70%);
}

.hero-orb-b {
  width: 36vw;
  height: 36vw;
  max-width: 420px;
  max-height: 420px;
  bottom: -8%;
  left: -8%;
  background: radial-gradient(circle, rgba(143, 111, 50, 0.22) 0%, transparent 68%);
  animation-delay: -4s;
}

.hero-orb-c {
  width: 28vw;
  height: 28vw;
  max-width: 320px;
  max-height: 320px;
  top: 38%;
  left: 42%;
  background: radial-gradient(circle, rgba(185, 28, 44, 0.1) 0%, transparent 70%);
  animation-delay: -8s;
}

.hero-lines {
  position: absolute;
  inset: 0;
  opacity: 0.45;
  background:
    linear-gradient(135deg, transparent 0%, transparent 46%, rgba(201, 164, 92, 0.09) 46.5%, transparent 47.2%),
    linear-gradient(135deg, transparent 0%, transparent 52%, rgba(201, 164, 92, 0.14) 52.4%, transparent 53%),
    linear-gradient(135deg, transparent 0%, transparent 58%, rgba(201, 164, 92, 0.07) 58.3%, transparent 59%),
    repeating-linear-gradient(
      -42deg,
      transparent 0,
      transparent 18px,
      rgba(201, 164, 92, 0.025) 18px,
      rgba(201, 164, 92, 0.025) 19px
    );
  mask-image: linear-gradient(120deg, transparent 15%, #000 45%, #000 75%, transparent 95%);
}

.hero-vignette {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 10, 11, 0.35) 0%, transparent 28%, transparent 55%, rgba(10, 10, 11, 0.88) 100%),
    linear-gradient(90deg, rgba(10, 10, 11, 0.55) 0%, transparent 40%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  max-width: 720px;
  animation: fadeUp 1s var(--ease) 0.15s both;
}

.hero-watermark {
  position: absolute;
  left: max(24px, calc((100% - 1180px) / 2));
  bottom: 40px;
  z-index: 1;
  font-family: var(--font-en);
  font-size: clamp(0.95rem, 1.6vw, 1.2rem);
  letter-spacing: 0.18em;
  color: rgba(201, 164, 92, 0.22);
  pointer-events: none;
  animation: fadeUp 1s var(--ease) 0.45s both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  color: var(--gold-bright);
  letter-spacing: 0.14em;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-bottom: 20px;
  max-width: 12em;
}

.hero-lead {
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 28em;
  margin-bottom: 36px;
}

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

.hero-meta {
  position: absolute;
  left: max(24px, calc((100% - 1180px) / 2));
  top: calc(var(--header-h) + 36px);
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-en);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  animation: fadeUp 1s var(--ease) 0.35s both;
}

.hero-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
}

.hero-scroll {
  position: absolute;
  right: max(24px, calc((100% - 1180px) / 2));
  bottom: 40px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  animation: fadeUp 1s var(--ease) 0.55s both;
}

.hero-scroll i {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, var(--gold), transparent);
  position: relative;
  overflow: hidden;
}

.hero-scroll i::after {
  content: "";
  position: absolute;
  left: 0;
  top: -40%;
  width: 100%;
  height: 40%;
  background: var(--gold-bright);
  animation: scrollLine 1.8s ease-in-out infinite;
}

/* About */
.about {
  background:
    radial-gradient(ellipse at 10% 0%, rgba(201, 164, 92, 0.08), transparent 50%),
    var(--bg);
  border-top: 1px solid var(--line);
}

.about-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 56px;
  align-items: center;
}

.about-visual {
  position: relative;
  isolation: isolate;
}

.about-visual img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--gold-line);
}

.about-visual-frame {
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid rgba(201, 164, 92, 0.2);
  z-index: -1;
  pointer-events: none;
}

.about-copy {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.about-body {
  color: var(--ink-muted);
  margin-bottom: 16px;
  font-size: 1.02rem;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat {
  background: var(--bg-elevated);
  padding: 28px 24px;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  transition: background 0.35s;
}

.stat:hover {
  background: var(--bg-soft);
}

.stat strong {
  font-family: var(--font-en);
  font-size: 2.6rem;
  font-weight: 500;
  color: var(--gold-bright);
  line-height: 1;
}

.stat span {
  font-size: 0.88rem;
  color: var(--ink-dim);
  letter-spacing: 0.04em;
}

/* Services */
.services {
  background: var(--bg-alt);
}

.service-rails {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.service-rail {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  border: 1px solid var(--line);
  isolation: isolate;
}

.rail-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.rail-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease), filter 0.8s var(--ease);
  filter: brightness(0.45) saturate(0.85);
}

.service-rail::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, transparent 20%, rgba(8, 8, 9, 0.92) 85%);
}

.rail-content {
  position: relative;
  z-index: 1;
  padding: 28px 22px;
  width: 100%;
}

.rail-num {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  display: block;
  margin-bottom: 14px;
}

.rail-content h3 {
  font-size: 1.45rem;
  margin-bottom: 10px;
}

.rail-content p {
  color: var(--ink-muted);
  font-size: 0.9rem;
  margin-bottom: 18px;
  min-height: 3.2em;
}

.rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--gold-bright);
}

.rail-link::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

.service-rail:hover .rail-bg img {
  transform: scale(1.08);
  filter: brightness(0.55) saturate(1);
}

.service-rail:hover .rail-link::after {
  transform: translateX(4px);
}

.service-rail:hover {
  border-color: var(--gold-line);
}

/* Work sections */
.work-section {
  border-top: 1px solid var(--line);
}

.work-alt {
  background: var(--bg-alt);
}

.work-head {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: end;
  margin-bottom: 48px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 360px;
  justify-content: flex-end;
}

.tag-list li {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  border: 1px solid var(--line);
  padding: 8px 12px;
  transition: border-color 0.25s, color 0.25s;
}

.tag-list li:hover {
  border-color: var(--gold-line);
  color: var(--gold-bright);
}

/* Galleries */
.gallery-item {
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  cursor: zoom-in;
  border: 1px solid transparent;
  transition: border-color 0.35s;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease), filter 0.7s;
}

.gallery-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 16px;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
  transform: translateY(8px);
  opacity: 0;
  transition: opacity 0.35s, transform 0.35s var(--ease);
}

.gallery-item:hover {
  border-color: var(--gold-line);
}

.gallery-item:hover img {
  transform: scale(1.05);
  filter: brightness(1.05);
}

.gallery-item:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

.gallery-planning {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: 280px 240px;
  gap: 14px;
}

.gallery-featured {
  grid-row: 1 / 3;
}

.gallery-masonry {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 14px;
}

.gallery-masonry .gallery-item:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-masonry .gallery-item:nth-child(6) {
  grid-column: span 2;
}

.motion-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 14px;
  min-height: 560px;
}

.motion-hero {
  min-height: 560px;
}

.motion-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.gallery-online {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.gallery-online .gallery-item {
  aspect-ratio: 4 / 3;
}

.gallery-online .gallery-wide {
  grid-column: 1 / -1;
  aspect-ratio: 21 / 7;
}

/* Contact */
.contact {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(185, 28, 44, 0.08), transparent 45%),
    radial-gradient(ellipse at 0% 100%, rgba(201, 164, 92, 0.1), transparent 40%),
    var(--bg);
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.contact-list {
  margin: 36px 0 40px;
  display: grid;
  gap: 18px;
}

.contact-list > div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.contact-list dt {
  color: var(--ink-dim);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
}

.contact-list dd {
  font-size: 1.05rem;
}

.contact-list a {
  color: var(--gold-bright);
  transition: color 0.25s;
}

.contact-list a:hover {
  color: var(--ink);
}

.contact-card {
  position: relative;
  padding: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--gold-line);
}

.contact-card::before,
.contact-card::after {
  content: "";
  position: absolute;
  width: 56px;
  height: 56px;
  border: 1px solid var(--gold-line);
  pointer-events: none;
}

.contact-card::before {
  top: 10px;
  right: 10px;
  border-left: 0;
  border-bottom: 0;
}

.contact-card::after {
  bottom: 10px;
  left: 10px;
  border-right: 0;
  border-top: 0;
}

.contact-card img {
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
}

.contact-card p {
  text-align: center;
  margin-top: 18px;
  color: var(--ink-muted);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  background: #080809;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand .logo-img {
  width: 40px;
  height: 40px;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.06em;
}

.footer-brand p {
  color: var(--ink-dim);
  font-size: 0.82rem;
  margin-top: 4px;
}

.copyright {
  color: var(--ink-dim);
  font-size: 0.82rem;
  font-family: var(--font-en);
  letter-spacing: 0.06em;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(5, 5, 6, 0.92);
  display: grid;
  place-items: center;
  padding: 48px 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox[hidden] {
  display: none;
}

.lightbox.is-open[hidden] {
  display: grid;
}

.lightbox img {
  max-width: min(1100px, 92vw);
  max-height: 78vh;
  object-fit: contain;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

.lightbox p {
  margin-top: 16px;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 2rem;
  color: var(--ink-muted);
  line-height: 1;
  transition: color 0.25s;
}

.lightbox-close:hover {
  color: var(--gold-bright);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes scrollLine {
  0% {
    top: -40%;
  }
  100% {
    top: 120%;
  }
}

@keyframes orbFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(-18px, 22px, 0) scale(1.06);
  }
}

/* Responsive */
@media (max-width: 1100px) {
  .service-rails {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-planning {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }

  .gallery-featured {
    grid-row: auto;
    grid-column: 1 / -1;
    min-height: 320px;
  }

  .gallery-masonry {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 200px;
  }

  .gallery-masonry .gallery-item:nth-child(1),
  .gallery-masonry .gallery-item:nth-child(6) {
    grid-column: span 2;
  }

  .gallery-online {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-online .gallery-wide {
    aspect-ratio: 16 / 7;
  }
}

@media (max-width: 860px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    inset: 0;
    background: rgba(8, 8, 9, 0.98);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s, visibility 0.35s;
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    font-size: 1.15rem;
  }

  .about-layout,
  .contact-grid,
  .motion-layout,
  .work-head {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .about-visual {
    max-width: 420px;
  }

  .about-visual-frame {
    inset: 12px -12px -12px 12px;
  }

  .motion-hero {
    min-height: 280px;
  }

  .tag-list {
    justify-content: flex-start;
    max-width: none;
  }

  .hero-meta,
  .hero-watermark {
    display: none;
  }

  .section {
    padding: 80px 0;
  }
}

@media (max-width: 640px) {
  .container,
  .header-inner,
  .hero-content {
    width: calc(100% - 32px);
  }

  .service-rails,
  .gallery-planning,
  .gallery-masonry,
  .gallery-online,
  .motion-side,
  .about-stats {
    grid-template-columns: 1fr;
  }

  .gallery-masonry .gallery-item:nth-child(1),
  .gallery-masonry .gallery-item:nth-child(6),
  .gallery-featured,
  .gallery-online .gallery-wide {
    grid-column: auto;
  }

  .gallery-masonry {
    grid-auto-rows: 220px;
  }

  .service-rail {
    min-height: 280px;
  }

  .gallery-online .gallery-wide {
    aspect-ratio: 16 / 9;
  }

  .contact-list > div {
    grid-template-columns: 72px 1fr;
  }

  .hero {
    align-items: center;
    padding-bottom: 100px;
  }

  .hero-scroll {
    right: 50%;
    transform: translateX(50%);
  }
}

.about-more {
  margin-top: 8px;
}

/* ========== 公司简介页 ========== */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 64px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 85% 20%, rgba(201, 164, 92, 0.16), transparent 55%),
    radial-gradient(ellipse 40% 50% at 10% 90%, rgba(185, 28, 44, 0.08), transparent 50%),
    linear-gradient(165deg, #12110f 0%, #0a0a0b 100%);
}

.page-hero-inner {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  margin-bottom: 14px;
}

.page-hero-lead {
  color: var(--ink-muted);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.intro-page {
  background:
    radial-gradient(ellipse at 0% 0%, rgba(201, 164, 92, 0.05), transparent 40%),
    var(--bg);
}

.intro-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: start;
}

.intro-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.intro-side img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--gold-line);
}

.intro-side-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 14px;
  background: var(--line);
  border: 1px solid var(--line);
}

.intro-side-meta > div {
  background: var(--bg-elevated);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.intro-side-meta strong {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--gold-bright);
  line-height: 1;
}

.intro-side-meta span {
  font-size: 0.82rem;
  color: var(--ink-dim);
  letter-spacing: 0.04em;
}

.intro-article h2 {
  margin-bottom: 28px;
}

.intro-prose {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.intro-prose p {
  color: var(--ink-muted);
  font-size: 1.05rem;
  line-height: 1.9;
}

.intro-prose strong {
  color: var(--gold-bright);
  font-weight: 500;
}

.intro-scope {
  margin-bottom: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.intro-scope h3 {
  font-size: 1.15rem;
  margin-bottom: 24px;
  letter-spacing: 0.06em;
}

.intro-scope ul {
  display: grid;
  gap: 0;
}

.intro-scope li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.intro-scope li span {
  font-family: var(--font-en);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  padding-top: 4px;
}

.intro-scope strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.intro-scope p {
  color: var(--ink-dim);
  font-size: 0.92rem;
  line-height: 1.6;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 860px) {
  .intro-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .intro-side {
    position: static;
    max-width: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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