:root {
  --bg: #f7f7f7;
  --paper: #ffffff;
  --ink: #111111;
  --muted: #6a6a6a;
  --line: #d8d8d8;
  --soft: #eeeeee;
  --danger: #b00020;
  --max: 1440px;
  --pad: 48px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header,
.admin-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px var(--pad);
  background: rgba(247, 247, 247, 0.96);
  border-bottom: 1px solid var(--line);
}

.admin-header {
  grid-template-columns: 1fr auto auto;
  max-width: none;
}

.brand-mark {
  font-size: 20px;
  font-weight: 760;
  line-height: 1;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

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

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
  min-height: 76vh;
  max-width: var(--max);
  margin: 0 auto;
  padding: 112px var(--pad) 72px;
  align-content: end;
  border-bottom: 1px solid var(--line);
}

.hero-label {
  grid-column: 1 / 4;
  align-self: start;
  color: var(--muted);
  font-size: 14px;
}

.hero h1 {
  grid-column: 4 / 13;
  margin: 0;
  font-size: 112px;
  line-height: 0.96;
  font-weight: 760;
}

.hero-copy {
  grid-column: 4 / 10;
  margin-top: 32px;
  color: var(--muted);
  font-size: 20px;
}

.hero-copy p {
  margin: 0 0 10px;
}

.section-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px var(--pad);
  border-bottom: 1px solid var(--line);
}

.section-label,
.kicker {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.2;
}

.kicker {
  margin: 0 0 20px;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px 24px;
}

.works-grid-large {
  margin-top: 64px;
}

.work-tile {
  display: grid;
  gap: 10px;
}

.work-tile:hover h3 {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.work-thumb {
  overflow: hidden;
  background: var(--soft);
  border: 1px solid var(--line);
}

.work-thumb img,
.image-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.work-tile h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.18;
  font-weight: 680;
}

.work-tile p {
  margin: 0;
  color: var(--muted);
}

.work-index {
  color: var(--muted);
  font-size: 13px;
}

.work-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.image-placeholder,
.qr-placeholder {
  display: grid;
  place-items: center;
  min-height: 180px;
  color: var(--muted);
  background:
    linear-gradient(90deg, transparent 49%, var(--line) 50%, transparent 51%),
    linear-gradient(0deg, transparent 49%, var(--line) 50%, transparent 51%),
    var(--soft);
}

.image-placeholder span {
  font-weight: 700;
}

.manifesto-preview h2,
.contact-strip h2 {
  max-width: 860px;
  margin: 0 0 18px;
  font-size: 48px;
  line-height: 1.06;
  font-weight: 720;
}

.manifesto-preview p,
.contact-strip p {
  max-width: 720px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 20px;
}

.section-action {
  margin-top: 28px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid currentColor;
  color: var(--ink);
}

.text-link:hover {
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px var(--pad);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.page-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px var(--pad) 96px;
}

.page-shell.narrow {
  max-width: 900px;
}

.page-intro {
  max-width: 980px;
}

.page-heading {
  margin: 0;
  font-size: 72px;
  line-height: 1.02;
  font-weight: 740;
}

.lead {
  color: var(--muted);
  font-size: 22px;
}

.empty-state {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.empty-state p {
  margin: 0 0 8px;
}

.case-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  align-items: end;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}

.case-meta,
.contact-list {
  margin: 0;
}

.case-meta div,
.contact-list div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.case-meta dt,
.contact-list dt {
  color: var(--muted);
  font-size: 13px;
}

.case-meta dd,
.contact-list dd {
  margin: 0;
}

.case-summary,
.case-body {
  max-width: 880px;
  margin: 56px 0;
  font-size: 22px;
  color: var(--ink);
}

.case-summary p,
.case-body p,
.methodology-head p,
.manifesto-body p,
.contact-note p {
  margin: 0 0 18px;
}

.case-gallery {
  display: grid;
  gap: 24px;
  margin-top: 56px;
}

.case-gallery figure {
  margin: 0;
  background: var(--soft);
  border: 1px solid var(--line);
}

.case-gallery img {
  width: 100%;
  height: auto;
}

.case-placeholder {
  min-height: 420px;
}

.methodology-head {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
  padding-bottom: 72px;
  border-bottom: 1px solid var(--line);
}

.methodology-head .kicker {
  grid-column: 1 / 2;
}

.methodology-head h1 {
  grid-column: 2 / 3;
  margin: 0;
  font-size: 88px;
  line-height: 0.98;
  font-weight: 760;
}

.methodology-head div {
  grid-column: 2 / 3;
  max-width: 780px;
  color: var(--muted);
  font-size: 21px;
}

.manifesto-list {
  display: grid;
}

.manifesto-row {
  display: grid;
  grid-template-columns: 120px 320px minmax(0, 1fr);
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.manifesto-number {
  color: var(--muted);
  font-size: 13px;
}

.manifesto-row h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.12;
  font-weight: 720;
}

.manifesto-body {
  max-width: 640px;
  color: var(--muted);
  font-size: 19px;
}

.manifesto-body ul {
  margin: 0;
  padding-left: 18px;
}

.contact-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 72px;
}

.contact-note {
  max-width: 680px;
  margin-top: 36px;
  color: var(--muted);
  font-size: 20px;
}

.contact-panel {
  display: grid;
  gap: 32px;
  align-content: start;
}

.qr-block {
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.qr-block img,
.current-qr img {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--paper);
}

.qr-block p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.admin-body {
  background: var(--paper);
}

.admin-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px var(--pad) 88px;
}

.admin-title-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 36px;
}

.admin-title-row h1,
.login-box h1 {
  margin: 0;
  font-size: 48px;
  line-height: 1;
}

.admin-table {
  border-top: 1px solid var(--line);
}

.admin-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.admin-row h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.admin-row p {
  margin: 4px 0;
  color: var(--muted);
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.admin-form {
  display: grid;
  gap: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

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

.field span {
  color: var(--muted);
  font-size: 13px;
}

.field small {
  color: var(--muted);
  font-size: 12px;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  padding: 13px 14px;
  outline: none;
}

.field textarea {
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--ink);
}

.checkbox-field {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 48px;
}

.checkbox-field input {
  width: auto;
}

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

.primary-button,
.plain-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 42px;
  border: 1px solid var(--ink);
  padding: 0 18px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

.plain-button {
  min-height: auto;
  border-color: transparent;
  padding: 0;
  background: transparent;
  color: var(--ink);
}

.plain-button:hover {
  color: var(--muted);
}

.plain-button.danger,
.danger {
  color: var(--danger);
}

.notice {
  margin: 0 0 24px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.notice-error {
  border-color: var(--danger);
  color: var(--danger);
  background: #fff7f7;
}

.admin-subsection {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.admin-subsection h2 {
  margin: 0 0 20px;
  font-size: 28px;
}

.image-admin-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.image-admin-grid figure {
  margin: 0;
  display: grid;
  gap: 8px;
}

.image-admin-grid img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
}

.image-admin-grid figcaption {
  color: var(--muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.current-qr {
  display: grid;
  gap: 14px;
  max-width: 260px;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-box {
  width: min(100%, 420px);
  display: grid;
  gap: 22px;
  padding: 36px;
  border: 1px solid var(--line);
  background: var(--paper);
}

@media (max-width: 1024px) {
  :root {
    --pad: 28px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 68vh;
  }

  .hero-label,
  .hero h1,
  .hero-copy {
    grid-column: auto;
  }

  .hero h1 {
    font-size: 80px;
  }

  .section-grid,
  .methodology-head,
  .case-head,
  .contact-page {
    grid-template-columns: 1fr;
  }

  .methodology-head .kicker,
  .methodology-head h1,
  .methodology-head div {
    grid-column: auto;
  }

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

  .manifesto-row {
    grid-template-columns: 80px minmax(0, 1fr);
  }

  .manifesto-body {
    grid-column: 2 / 3;
  }
}

@media (max-width: 720px) {
  :root {
    --pad: 20px;
  }

  .site-header,
  .admin-header {
    position: static;
    grid-template-columns: 1fr;
    gap: 16px;
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .site-nav {
    gap: 14px;
  }

  .hero {
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 50px;
  }

  .hero-copy,
  .manifesto-preview p,
  .contact-strip p,
  .contact-note,
  .case-summary,
  .case-body,
  .methodology-head div,
  .manifesto-body {
    font-size: 17px;
  }

  .page-heading,
  .methodology-head h1 {
    font-size: 42px;
  }

  .manifesto-preview h2,
  .contact-strip h2 {
    font-size: 34px;
  }

  .works-grid,
  .form-grid,
  .image-admin-grid {
    grid-template-columns: 1fr;
  }

  .section-grid,
  .page-shell,
  .admin-shell {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .site-footer,
  .admin-title-row,
  .admin-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .manifesto-row {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 32px 0;
  }

  .manifesto-body {
    grid-column: auto;
  }

  .case-meta div,
  .contact-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .login-box {
    padding: 24px;
  }
}