:root {
  --paper: #f4f1eb;
  --panel: #fbfaf6;
  --ink: #111111;
  --muted: #6f6b62;
  --line: #cbc5b8;
  --deep: #050505;
  --oxide: #815b45;
  --sage: #5d655b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

button {
  font: inherit;
}

.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
}

.side-rail {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 24px 14px 30px;
  z-index: 5;
}

.logo-link {
  display: block;
  width: 68px;
  transition: transform 700ms ease;
}

.logo-link img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(1) contrast(0.82) brightness(0.92);
  opacity: 0.7;
  transition: filter 700ms ease, opacity 700ms ease, transform 700ms ease;
}

.logo-link:hover img,
.logo-link:focus-visible img {
  filter: grayscale(0) contrast(1) brightness(1);
  opacity: 1;
  transform: translateY(-2px);
}

.rail-meta {
  writing-mode: vertical-rl;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.site-main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  height: 86px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  padding: 0 46px;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 241, 235, 0.92);
  backdrop-filter: blur(18px);
  z-index: 4;
}

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
  font-size: 13px;
}

.nav a,
.language a {
  transition: color 240ms ease;
}

.nav a:hover,
.language a:hover {
  color: var(--oxide);
}

.language {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 12px;
}

.hero {
  min-height: calc(100vh - 86px);
  display: grid;
  grid-template-columns: minmax(340px, 34vw) minmax(0, 1fr);
}

.hero-copy {
  padding: 48px 42px 36px 46px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 86px);
}

.eyebrow,
.section-title p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  margin: 40px 0 42px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(42px, 4.3vw, 62px);
  line-height: 1.08;
  font-weight: 400;
  max-width: 520px;
}

.intro {
  max-width: 410px;
  color: #393631;
  font-size: 15px;
  line-height: 1.95;
  margin: 0 0 56px;
}

.project-index {
  margin-top: auto;
  border-top: 1px solid var(--line);
}

.project-item {
  width: 100%;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.project-item span,
.project-item em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}

.project-item strong {
  font-size: 14px;
  font-weight: 400;
  transition: color 240ms ease;
}

.project-item:hover strong,
.project-item:focus-visible strong,
.project-item.is-active strong {
  color: var(--oxide);
}

.hero-visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--deep);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: calc(100vh - 86px);
  object-fit: cover;
  display: block;
  filter: grayscale(78%) contrast(1.04) brightness(0.78);
  transform: scale(1.01);
  transition: filter 700ms ease, transform 900ms ease, opacity 260ms ease;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.42), transparent 42%),
    linear-gradient(180deg, rgba(5, 5, 5, 0.12), rgba(5, 5, 5, 0.52));
  pointer-events: none;
  transition: opacity 700ms ease;
}

.hero-visual:hover img,
.hero-visual:focus-within img {
  filter: grayscale(0%) contrast(1.02) brightness(0.96) saturate(1.06);
  transform: scale(1.035);
}

.hero-visual:hover::after,
.hero-visual:focus-within::after {
  opacity: 0.54;
}

.hero-visual figcaption {
  position: absolute;
  left: 38px;
  right: 38px;
  bottom: 34px;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  color: #f4f0e7;
  border-top: 1px solid rgba(244, 240, 231, 0.42);
  padding-top: 18px;
}

.hero-visual strong {
  display: block;
  font-size: 19px;
  font-weight: 400;
  margin-bottom: 8px;
}

.hero-visual p {
  margin: 0;
  color: rgba(244, 240, 231, 0.76);
  font-size: 12px;
  line-height: 1.65;
  max-width: 560px;
}

.hero-visual a {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(244, 240, 231, 0.72);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #f4f0e7;
  font-size: 22px;
  transition: background 240ms ease, color 240ms ease;
}

.hero-visual a:hover {
  background: #f4f0e7;
  color: var(--deep);
}

.section {
  padding: 92px 46px;
  border-top: 1px solid var(--line);
}

.section-title {
  display: grid;
  grid-template-columns: minmax(160px, 22vw) minmax(0, 720px);
  gap: 42px;
  align-items: start;
  margin-bottom: 54px;
}

.section-title h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  font-weight: 400;
}

.work-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.work-list article {
  min-height: 260px;
  padding: 28px 28px 34px 0;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.work-list article + article {
  padding-left: 28px;
}

.work-list article:last-child {
  border-right: 0;
}

.work-list span {
  color: var(--sage);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.work-list h3 {
  margin: 42px 0 18px;
  font-size: 22px;
  font-weight: 400;
}

.work-list p,
.method-list p,
.about-section > p,
.contact-section > p,
.seo-entry-list p,
.faq-list p {
  margin: 0;
  color: #3d3933;
  font-size: 15px;
  line-height: 1.9;
}

.method-section {
  background: #e9ece4;
}

.method-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid rgba(17, 17, 17, 0.18);
}

.method-list li {
  min-height: 220px;
  padding: 28px 30px 0 0;
  border-right: 1px solid rgba(17, 17, 17, 0.18);
}

.method-list li + li {
  padding-left: 30px;
}

.method-list li:last-child {
  border-right: 0;
}

.method-list span {
  color: var(--sage);
  font-size: 12px;
}

.method-list strong {
  display: block;
  margin: 36px 0 16px;
  font-size: 22px;
  font-weight: 400;
}

.services-section {
  background: #f7f5ef;
}

.seo-entry-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.seo-entry-list a {
  display: grid;
  grid-template-columns: 72px minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: 28px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.seo-entry-list span {
  color: var(--muted);
  font-size: 12px;
}

.seo-entry-list strong {
  font-size: 22px;
  font-weight: 400;
  transition: color 240ms ease;
}

.seo-entry-list a:hover strong {
  color: var(--oxide);
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.faq-list article {
  min-height: 220px;
  padding: 28px 32px 28px 0;
  border-bottom: 1px solid var(--line);
}

.faq-list article:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.faq-list article:nth-child(even) {
  padding-left: 32px;
}

.faq-list h3 {
  margin: 0 0 24px;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 400;
}

.about-section,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.about-section > p {
  max-width: 720px;
  margin-left: calc(22vw + 42px);
}

.contact-section {
  background: #10100f;
  color: #f4f1eb;
}

.contact-section .section-title p,
.contact-section > p {
  color: rgba(244, 241, 235, 0.68);
}

.contact-content {
  margin-left: calc(22vw + 42px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 168px;
  gap: 42px;
  align-items: end;
}

.contact-link {
  display: inline-block;
  width: fit-content;
  margin-bottom: 22px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.1;
  color: #f4f1eb;
  border-bottom: 1px solid rgba(244, 241, 235, 0.46);
}

.contact-content p {
  color: rgba(244, 241, 235, 0.68);
}

.wechat-card {
  margin: 0;
  width: 168px;
}

.wechat-card img {
  width: 168px;
  aspect-ratio: 1;
  display: block;
  padding: 10px;
  background: #f4f1eb;
  border: 1px solid rgba(244, 241, 235, 0.26);
}

.wechat-card figcaption {
  margin-top: 12px;
  color: rgba(244, 241, 235, 0.68);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.seo-page {
  background: var(--paper);
}

.seo-page-header {
  min-height: 72vh;
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
}

.seo-page-main {
  padding: 54px 46px 72px;
}

.breadcrumb {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 78px;
}

.breadcrumb a {
  border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
  border-bottom-color: var(--muted);
}

.seo-title-block {
  max-width: 860px;
}

.seo-title-block p {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.seo-title-block h1 {
  max-width: 760px;
}

.seo-title-block .lead {
  max-width: 650px;
  color: #393631;
  font-size: 17px;
  line-height: 1.9;
}

.seo-title-block .seo-meta {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.seo-content {
  max-width: 980px;
  margin: 0 auto;
  padding: 86px 46px;
}

.seo-content section {
  display: grid;
  grid-template-columns: minmax(160px, 0.3fr) minmax(0, 1fr);
  gap: 42px;
  padding: 38px 0;
  border-top: 1px solid var(--line);
}

.seo-content h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  font-weight: 400;
}

.seo-content h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 400;
}

.seo-content p,
.seo-content li {
  color: #3d3933;
  font-size: 16px;
  line-height: 1.95;
}

.seo-content p {
  margin-top: 0;
}

.seo-content p + p {
  margin-top: 18px;
}

.seo-content ul {
  margin: 0;
  padding-left: 1.2em;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.content-grid > div {
  min-width: 0;
  padding: 24px 24px 4px 0;
  border-right: 1px solid var(--line);
}

.content-grid > div + div {
  padding-left: 24px;
}

.content-grid > div:last-child {
  border-right: 0;
}

.content-grid strong {
  display: block;
  margin-bottom: 14px;
  font-size: 18px;
  font-weight: 400;
}

.content-grid p {
  margin: 0;
  font-size: 14px;
}

.service-notes {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: service-step;
}

.service-notes li {
  position: relative;
  padding: 16px 0 16px 48px;
  border-top: 1px solid var(--line);
  counter-increment: service-step;
}

.service-notes li::before {
  content: counter(service-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--muted);
  font-size: 12px;
}

.service-notes strong {
  color: var(--ink);
  font-weight: 400;
}

.question-list {
  border-top: 1px solid var(--line);
}

.question-list article {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.question-list article:last-child {
  border-bottom: 0;
}

.question-list h3 {
  margin-bottom: 14px;
  line-height: 1.5;
}

.question-list p {
  margin: 0;
}

.page-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.page-link-row a {
  border: 1px solid var(--line);
  padding: 12px 16px;
  color: var(--ink);
  transition: border-color 240ms ease, color 240ms ease;
}

.page-link-row a:hover {
  border-color: var(--oxide);
  color: var(--oxide);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  align-items: center;
  justify-content: space-between;
  padding: 22px 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.site-footer a {
  border-bottom: 1px solid transparent;
  transition: color 240ms ease, border-color 240ms ease;
}

.site-footer a:hover {
  color: var(--oxide);
  border-bottom-color: var(--oxide);
}

@media (max-width: 980px) {
  .site-shell {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .logo-link {
    width: 52px;
  }

  .topbar {
    padding: 0 24px;
  }

  .nav {
    gap: 20px;
  }

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

  .hero-copy {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    min-height: auto;
    padding: 42px 24px 34px;
  }

  .hero-visual img {
    min-height: 58vh;
  }

  .section {
    padding: 72px 24px;
  }

  .section-title,
  .work-list,
  .method-list,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .work-list article,
  .work-list article + article,
  .method-list li,
  .method-list li + li,
  .faq-list article,
  .faq-list article:nth-child(even) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 28px 0;
    min-height: auto;
  }

  .seo-entry-list a {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 18px;
  }

  .seo-entry-list p {
    grid-column: 2;
  }

  .method-list li,
  .method-list li + li {
    border-bottom-color: rgba(17, 17, 17, 0.18);
  }

  .about-section > p,
  .contact-content {
    margin-left: 0;
  }

  .contact-content {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .seo-page-header {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .seo-content,
  .seo-page-main {
    padding-left: 24px;
    padding-right: 24px;
  }

  .site-footer {
    padding-left: 24px;
    padding-right: 24px;
  }

  .seo-content section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

  .content-grid > div,
  .content-grid > div + div {
    padding: 22px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .content-grid > div:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 640px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

  .side-rail {
    position: static;
    height: 72px;
    flex-direction: row;
    padding: 10px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .logo-link {
    width: 46px;
  }

  .rail-meta {
    writing-mode: horizontal-tb;
  }

  .topbar {
    top: 0;
    height: 64px;
    padding: 0 18px;
  }

  .nav {
    gap: 16px;
    font-size: 12px;
  }

  .language {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  .project-item {
    grid-template-columns: 32px minmax(0, 1fr) 42px;
  }

  .hero-visual figcaption {
    left: 22px;
    right: 22px;
    bottom: 22px;
  }

  .seo-page-header {
    grid-template-columns: 1fr;
  }

  .seo-page-header .side-rail {
    position: static;
  }

  .breadcrumb {
    margin-bottom: 52px;
  }
}

.admin-page {
  background: #ece7dd;
}

.admin-shell {
  grid-template-columns: 116px minmax(0, 1fr);
}

.admin-main {
  padding: 0 46px 72px;
}

.admin-header {
  min-height: 220px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: end;
  padding: 42px 0 36px;
}

.admin-header h1,
.admin-panel h2,
.admin-card h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.admin-header h1 {
  margin-top: 18px;
  font-size: clamp(38px, 4vw, 60px);
  line-height: 1.08;
}

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

.admin-button {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  background: rgba(251, 250, 246, 0.86);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 240ms ease, color 240ms ease, background 240ms ease;
}

.admin-button:hover {
  border-color: var(--oxide);
  color: var(--oxide);
}

.admin-button-primary {
  background: #151412;
  color: #f4f1eb;
  border-color: #151412;
}

.admin-button-primary:hover {
  color: #f4f1eb;
  background: #2b241e;
  border-color: #2b241e;
}

.admin-upload {
  display: inline-flex;
  align-items: center;
}

.admin-panel {
  margin-top: 18px;
  padding: 28px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  background: rgba(251, 250, 246, 0.78);
  backdrop-filter: blur(12px);
}

.admin-panel-compact {
  margin-bottom: 40px;
}

.admin-section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 18px;
  margin-bottom: 22px;
}

.admin-section-heading h2 {
  font-size: 28px;
}

.admin-section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.admin-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.admin-field,
.admin-card {
  min-width: 0;
}

.admin-field {
  display: grid;
  gap: 8px;
}

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

.admin-field span {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-field input,
.admin-field textarea {
  width: 100%;
  border: 1px solid rgba(17, 17, 17, 0.12);
  background: #f9f6f0;
  color: var(--ink);
  font: inherit;
  padding: 14px 16px;
  resize: vertical;
  border-radius: 0;
}

.admin-field input:focus,
.admin-field textarea:focus {
  outline: none;
  border-color: var(--oxide);
}

.admin-card {
  padding: 18px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: #f8f5ee;
}

.admin-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.admin-card h3 {
  font-size: 21px;
}

.admin-remove {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
}

.admin-remove:hover {
  color: var(--oxide);
}

@media (max-width: 980px) {
  .admin-main {
    padding-left: 24px;
    padding-right: 24px;
  }

  .admin-header,
  .admin-grid,
  .admin-grid.two-col,
  .admin-stack {
    grid-template-columns: 1fr;
  }
}