/* 庄锦数 — 墨黑琥珀企业官网 */
:root {
  --bg: #0e0e0e;
  --bg-elevated: #161310;
  --bg-soft: #1c1814;
  --ink: #f5ede4;
  --ink-muted: #c4b5a5;
  --ink-dim: #8a7b6c;
  --amber: #d4a574;
  --amber-bright: #e8c49a;
  --line: rgba(212, 165, 116, 0.22);
  --line-strong: rgba(212, 165, 116, 0.4);
  --danger: #e07a6a;
  --success: #8fbf8a;
  --font-display: "Noto Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Source Sans 3", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --max: 1120px;
  --header-h: 4.25rem;
  --radius: 2px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  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)' opacity='0.55'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

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

a {
  color: var(--amber-bright);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

p {
  margin: 0 0 1rem;
  color: var(--ink-muted);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.section {
  padding: clamp(4.5rem, 10vw, 7rem) 0;
  position: relative;
  z-index: 1;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  color: var(--ink);
  max-width: 16ch;
}

.section-lead {
  max-width: 38rem;
  font-size: 1.08rem;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  backdrop-filter: blur(14px);
  background: rgba(14, 14, 14, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(14, 14, 14, 0.9);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, var(--max));
}

.brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.12em;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  gap: 0.15rem;
}

.brand-text small {
  font-family: var(--font-body);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.brand:hover {
  color: var(--amber-bright);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.25rem;
}

.nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-left: 0.5rem;
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-dim);
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-switch button.is-active {
  background: var(--amber);
  color: #1a120c;
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.25s ease, top 0.25s ease, opacity 0.25s ease;
}

.nav-toggle span {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Hero */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-h) + 2rem) 0 4.5rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 78% 18%, rgba(212, 165, 116, 0.2), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(166, 124, 82, 0.12), transparent 55%),
    linear-gradient(165deg, #0e0e0e 0%, #16120f 42%, #241c14 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 35%;
  background: linear-gradient(to top, var(--bg), transparent);
}

.hero-logo {
  width: 72px;
  height: 72px;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: rise 0.9s ease 0.05s forwards;
  filter: drop-shadow(0 8px 24px rgba(212, 165, 116, 0.25));
}

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 1.4rem;
  opacity: 0;
  animation: rise 0.9s ease 0.15s forwards;
}

.hero-title {
  font-size: clamp(3.4rem, 12vw, 7rem);
  letter-spacing: 0.08em;
  line-height: 1;
  margin: 0 0 1.25rem;
  color: var(--ink);
  opacity: 0;
  animation: rise 0.95s ease 0.28s forwards;
}

.hero-tagline {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  max-width: 32rem;
  color: var(--ink-muted);
  margin-bottom: 2.25rem;
  opacity: 0;
  animation: rise 0.95s ease 0.42s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  animation: rise 0.95s ease 0.55s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.45rem;
  font: inherit;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--amber);
  color: #1a120c;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--amber-bright);
  color: #1a120c;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--amber);
  color: var(--amber-bright);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 {
  transition-delay: 0.08s;
}
.reveal-delay-2 {
  transition-delay: 0.16s;
}
.reveal-delay-3 {
  transition-delay: 0.24s;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  margin-top: 2.5rem;
}

.stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.stat-list li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.stat-list .label {
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.stat-list .value {
  color: var(--ink);
  font-weight: 500;
}

/* Capabilities */
.capability-list {
  margin-top: 2.75rem;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.capability {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1.25rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s ease, padding-left 0.25s ease;
}

.capability:hover {
  padding-left: 0.5rem;
  background: linear-gradient(90deg, rgba(212, 165, 116, 0.06), transparent 60%);
}

.capability-index {
  font-family: var(--font-display);
  color: var(--amber);
  font-size: 1.1rem;
  padding-top: 0.15rem;
}

.capability h3 {
  font-size: 1.25rem;
  margin-bottom: 0.4rem;
}

.capability p {
  margin: 0;
  max-width: 42rem;
}

/* Cases */
.case-list {
  margin-top: 2.75rem;
  display: grid;
  gap: 2rem;
}

.case-study {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 0;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  overflow: hidden;
}

.case-study.reverse .case-media {
  order: 2;
}

.case-study.reverse .case-copy {
  order: 1;
}

.case-media {
  min-height: 280px;
  background: #111;
}

.case-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.case-copy {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.75rem;
}

.case-meta .dot {
  opacity: 0.5;
}

.case-copy h3 {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  margin-bottom: 0.65rem;
  color: var(--ink);
}

.case-product {
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 0.65rem;
}

.case-copy > p:not(.case-meta):not(.case-product) {
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  margin: 0 0 1.35rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.95rem;
  color: var(--ink-muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.case-copy .btn {
  align-self: flex-start;
}

/* Social product gallery */
.case-study-wide {
  grid-template-columns: 1.25fr 0.85fr;
}

.case-gallery {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: repeat(2, minmax(140px, 1fr));
  gap: 2px;
  min-height: 360px;
  background: #0a0a0a;
}

.gallery-item {
  margin: 0;
  position: relative;
  overflow: hidden;
  min-height: 140px;
}

.gallery-hero {
  grid-row: 1 / span 2;
  min-height: 100%;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  min-height: 140px;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
  transition: transform 0.45s ease;
}

.gallery-hero img {
  min-height: 100%;
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.6rem 0.75rem 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f5ede4;
  background: linear-gradient(to top, rgba(14, 14, 14, 0.85), transparent);
  pointer-events: none;
}

/* Company info */
.info-panel {
  margin-top: 2.5rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(212, 165, 116, 0.05), transparent 40%),
    var(--bg-elevated);
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  text-align: left;
  vertical-align: top;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  font-weight: 400;
}

.info-table tr:last-child th,
.info-table tr:last-child td {
  border-bottom: 0;
}

.info-table th {
  width: 8.5rem;
  color: var(--ink-dim);
  font-size: 0.92rem;
}

.info-table td {
  color: var(--ink);
  word-break: break-all;
}

.info-table a {
  text-decoration: none;
  color: var(--amber-bright);
}

/* Contact */
.contact-layout {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.contact-meta {
  display: grid;
  gap: 1.5rem;
}

.contact-meta h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
  color: var(--ink);
}

.contact-meta p,
.contact-meta a {
  margin: 0;
  color: var(--ink-muted);
  text-decoration: none;
}

.contact-meta a:hover {
  color: var(--amber-bright);
}

.qr-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.5rem;
}

.qr-block img {
  width: 148px;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.qr-block p {
  font-size: 0.92rem;
  max-width: 12rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  background: rgba(22, 19, 16, 0.65);
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-size: 0.88rem;
  color: var(--ink-dim);
}

.form-row input,
.form-row textarea {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  background: #0e0e0e;
  color: var(--ink);
  font: inherit;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s ease;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--amber);
}

.form-row textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-row .error {
  color: var(--danger);
  font-size: 0.82rem;
  min-height: 1.1em;
}

.form-status {
  font-size: 0.92rem;
  min-height: 1.4em;
  color: var(--success);
}

.form-status.is-error {
  color: var(--danger);
}

.form-note {
  font-size: 0.82rem;
  color: var(--ink-dim);
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  position: relative;
  z-index: 1;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--ink-muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--amber-bright);
}

/* Floating contact dock — always fixed to viewport middle-right */
.float-contact {
  position: fixed !important;
  right: 16px;
  top: 50%;
  left: auto;
  bottom: auto;
  transform: translateY(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin: 0;
  padding: 0;
  pointer-events: none;
}

.float-contact > * {
  pointer-events: auto;
}

.float-contact-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--line-strong);
  background: rgba(22, 19, 16, 0.95);
  color: var(--amber);
  writing-mode: vertical-rl;
  letter-spacing: 0.18em;
  font: inherit;
  font-size: 0.85rem;
  padding: 1rem 0.55rem;
  cursor: pointer;
  border-radius: 4px 0 0 4px;
}

.float-contact-panel {
  display: block;
  width: 228px;
  background: rgba(18, 15, 12, 0.96);
  border: 1px solid var(--line);
  border-radius: 12px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.float-contact-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--amber);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.float-contact-close {
  display: none;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-dim);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.2rem;
}

.float-contact-block {
  display: block;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
}

.float-contact-block:last-child {
  border-bottom: 0;
}

.float-block-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.float-block-title p,
.float-row p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.float-block-title small {
  color: var(--ink-dim);
  font-size: 0.72rem;
}

.float-qr {
  text-align: center;
}

.float-qr img {
  width: 132px;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 4px;
}

.float-qr-cap {
  margin: 0.65rem 0 0;
  font-size: 0.78rem;
  color: var(--ink-dim);
}

.float-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  transition: background 0.2s ease;
}

.float-row:hover {
  background: rgba(212, 165, 116, 0.08);
}

.float-row strong {
  display: block;
  margin-top: 0.15rem;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 560;
  word-break: break-all;
}

.float-ico {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(212, 165, 116, 0.1);
  position: relative;
}

.float-ico::before,
.float-ico::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
}

.float-ico-chat::before {
  width: 12px;
  height: 10px;
  border: 1.5px solid var(--amber);
  border-radius: 3px;
}

.float-ico-phone::before {
  width: 8px;
  height: 12px;
  border: 1.5px solid var(--amber);
  border-radius: 2px;
}

.float-ico-mail::before {
  width: 12px;
  height: 9px;
  border: 1.5px solid var(--amber);
  border-radius: 1px;
}

@media (max-width: 860px) {
  .float-contact {
    right: 0;
    top: auto;
    bottom: 22vh;
    transform: none;
  }

  .float-contact-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .float-contact-close {
    display: inline-block;
  }

  .float-contact-panel {
    display: none;
    position: absolute;
    right: 0;
    bottom: 0;
    width: min(78vw, 240px);
  }

  .float-contact.is-open .float-contact-panel {
    display: block;
  }

  .float-contact.is-open .float-contact-toggle {
    display: none;
  }
}

@media (max-width: 900px) {
  .case-study,
  .case-study.reverse,
  .case-study-wide {
    grid-template-columns: 1fr;
  }

  .case-study.reverse .case-media,
  .case-study.reverse .case-copy {
    order: initial;
  }

  .case-media img {
    min-height: 200px;
  }

  .case-gallery {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
    min-height: 0;
  }

  .gallery-hero {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 200px;
  }

  .gallery-item,
  .gallery-item img {
    min-height: 120px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(14, 14, 14, 0.96);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .lang-switch {
    margin: 0.85rem 0 0;
    width: fit-content;
  }

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

  .stat-list li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .hero-title {
    letter-spacing: 0.05em;
  }
}

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

  .hero-eyebrow,
  .hero-title,
  .hero-tagline,
  .hero-actions,
  .reveal {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
}