:root {
  --paper: #f4efe6;
  --paper-2: #fbf8f2;
  --paper-3: #eee6da;
  --ink: #1d1712;
  --moss: #253227;
  --moss-2: #314137;
  --wood: #a87444;
  --gold: #c89a63;
  --line: rgba(29, 23, 18, 0.12);
  --line-light: rgba(255, 255, 255, 0.16);
  --shadow: 0 18px 36px rgba(24, 20, 16, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body,
input,
select,
textarea,
button {
  font-size: 16px;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", serif;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.08;
}

h1 {
  font-size: 4rem;
}

h2 {
  font-size: 2.3rem;
}

h3 {
  font-size: 1.35rem;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 1000;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 239, 230, 0.88);
  border-bottom: 1px solid rgba(29, 23, 18, 0.08);
  backdrop-filter: blur(14px);
}

.topbar__inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 24px;
  justify-content: space-between;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}

.brand__kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--wood);
}

.brand__name {
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
  font-size: 1.24rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav a {
  text-decoration: none;
  font-size: 0.95rem;
  opacity: 0.82;
}

.nav a:hover,
.nav a.is-current {
  opacity: 1;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
  transition:
    transform 0.15s ease,
    background-color 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button--solid {
  background: var(--ink);
  color: #fff;
}

.button--solid:hover,
.button--solid:focus-visible {
  background: #120e0b;
}

.button--ghost {
  border-color: rgba(29, 23, 18, 0.16);
  color: var(--ink);
}

.button--light {
  border-color: rgba(255, 255, 255, 0.26);
  color: #fff;
}

.button--light:hover,
.button--light:focus-visible {
  border-color: rgba(255, 255, 255, 0.5);
}

.button--small {
  min-height: 40px;
  padding-inline: 14px;
  font-size: 0.94rem;
}

.icon {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

.hero {
  position: relative;
  min-height: calc(100svh - 76px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background: #13100d;
}

.hero__image,
.contact__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__scrim,
.contact__scrim {
  position: absolute;
  inset: 0;
}

.hero__scrim {
  background: linear-gradient(
    90deg,
    rgba(18, 15, 12, 0.82) 0%,
    rgba(18, 15, 12, 0.38) 48%,
    rgba(18, 15, 12, 0.18) 100%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding: 104px 0 56px;
}

.hero__copy {
  max-width: 760px;
}

.hero__lead {
  max-width: 46rem;
  margin-top: 18px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero__stats {
  margin: 36px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 760px;
}

.stat {
  padding: 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(20, 16, 12, 0.18);
}

.stat dt {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.66);
}

.stat dd {
  margin: 8px 0 0;
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
  font-size: 1.08rem;
}

.quote-band {
  background: var(--moss);
  color: #f5efe6;
}

.quote-band__inner {
  padding: 18px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  justify-content: space-between;
}

.quote-band__en {
  font-size: 0.94rem;
  letter-spacing: 0.02em;
}

.quote-band__zh {
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
}

.section {
  padding: 88px 0;
  scroll-margin-top: 92px;
}

.section--paper {
  background: var(--paper);
}

.section--alt {
  background: var(--paper-3);
}

.section--dark {
  background: var(--moss);
  color: #f7f2ea;
}

.section--contact {
  position: relative;
  overflow: hidden;
  color: #fff;
}

.section--contact .section__lead,
.section--contact .section__lead--light,
.section--contact .contact-points p,
.section--contact .eyebrow--light {
  color: rgba(255, 255, 255, 0.82);
}

.section__grid {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.94fr);
  align-items: start;
}

.section__grid--craft {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.96fr);
}

.section__copy {
  max-width: 100%;
}

.section__copy--light .section__lead {
  color: rgba(247, 242, 234, 0.8);
}

.section-head {
  margin-bottom: 28px;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-end;
}

.section-head--split {
  align-items: flex-start;
}

.section__lead {
  margin-top: 14px;
  max-width: 46rem;
  line-height: 1.75;
  color: rgba(29, 23, 18, 0.74);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--wood);
}

.eyebrow--light {
  color: #d9b17c;
}

.values-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.value-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.46);
}

.value-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
}

.value-card p {
  line-height: 1.7;
  color: rgba(29, 23, 18, 0.76);
}

.statement {
  margin-top: 20px;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.statement p {
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
  font-size: 1.08rem;
}

.statement span {
  display: block;
  margin-top: 6px;
  color: rgba(29, 23, 18, 0.72);
}

.media-frame {
  margin: 0;
  border: 1px solid rgba(29, 23, 18, 0.1);
  border-radius: 6px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.media-frame--wide {
  aspect-ratio: 1132 / 834;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.section--dark .media-frame {
  background: #f4eee3;
}

.tablist {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.tab {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(29, 23, 18, 0.16);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
}

.tab.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.series-layout {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 0.96fr) minmax(320px, 1.04fr);
  align-items: start;
}

.series-copy {
  padding-top: 4px;
}

.series-meta {
  display: grid;
  gap: 16px;
}

.series-meta h3 {
  font-size: 1.6rem;
}

.series-meta p {
  line-height: 1.78;
  color: rgba(29, 23, 18, 0.76);
}

.series-note {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.series-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.series-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.series-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 0.58em;
  border-radius: 999px;
  background: var(--gold);
  flex: 0 0 auto;
}

.timeline {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.timeline li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.timeline__index {
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
  font-size: 1.16rem;
  color: var(--gold);
}

.timeline__body strong {
  display: block;
  margin-bottom: 4px;
  font-size: 1rem;
}

.timeline__body p {
  line-height: 1.72;
  color: rgba(247, 242, 234, 0.82);
}

.climate-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.climate-card {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
}

.climate-card strong {
  display: block;
  margin-bottom: 8px;
}

.climate-card p {
  line-height: 1.68;
  color: rgba(247, 242, 234, 0.82);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.filters label {
  display: grid;
  gap: 8px;
  min-width: 128px;
  font-size: 0.92rem;
}

.filters span {
  color: rgba(29, 23, 18, 0.62);
}

.filters select {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid rgba(29, 23, 18, 0.16);
  border-radius: 6px;
  background: #fff;
  color: inherit;
}

.case-detail {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  margin-bottom: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow);
}

.case-detail__media {
  min-width: 0;
  aspect-ratio: 1132 / 834;
  border: 1px solid rgba(29, 23, 18, 0.08);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}

.case-detail__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.case-detail__body {
  display: grid;
  gap: 14px;
  align-content: start;
}

.case-detail__body h3 {
  font-size: 1.7rem;
}

.case-detail__summary {
  line-height: 1.78;
  color: rgba(29, 23, 18, 0.76);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.meta-grid div {
  padding: 12px;
  border: 1px solid rgba(29, 23, 18, 0.08);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.7);
}

.meta-grid dt {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(29, 23, 18, 0.58);
}

.meta-grid dd {
  margin: 8px 0 0;
  font-weight: 600;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(29, 23, 18, 0.06);
  font-size: 0.9rem;
}

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

.case-card {
  display: grid;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(24, 20, 16, 0.04);
}

.case-card.is-active {
  border-color: rgba(168, 116, 68, 0.45);
  box-shadow: 0 12px 30px rgba(168, 116, 68, 0.12);
}

.case-card__media {
  aspect-ratio: 1132 / 834;
  border: 1px solid rgba(29, 23, 18, 0.08);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}

.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.case-card__body {
  display: grid;
  gap: 8px;
}

.case-card__title {
  font-size: 1.02rem;
  font-weight: 700;
}

.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(29, 23, 18, 0.66);
  font-size: 0.9rem;
}

.case-card__summary {
  line-height: 1.65;
  color: rgba(29, 23, 18, 0.76);
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.promise-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
}

.promise-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.promise-card p {
  line-height: 1.7;
  color: rgba(29, 23, 18, 0.76);
}

.process-row {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.process-step {
  min-height: 136px;
  padding: 18px;
  border-radius: 6px;
  background: var(--moss);
  color: #f5efe6;
}

.process-step strong {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
}

.process-step p {
  line-height: 1.68;
  color: rgba(245, 239, 230, 0.82);
}

.contact__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 28px;
  align-items: start;
}

.contact__scrim {
  background: linear-gradient(
    90deg,
    rgba(13, 18, 14, 0.82) 0%,
    rgba(13, 18, 14, 0.52) 56%,
    rgba(13, 18, 14, 0.34) 100%
  );
}

.contact__copy {
  max-width: 42rem;
  padding: 16px 0;
}

.contact-points {
  margin-top: 24px;
  display: grid;
  gap: 0;
}

.contact-point {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.contact-point strong {
  font-size: 1rem;
}

.contact-point p {
  line-height: 1.7;
}

.form {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(247, 243, 236, 0.94);
  color: var(--ink);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
}

.form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form label {
  display: grid;
  gap: 8px;
}

.form span {
  font-size: 0.92rem;
  color: rgba(29, 23, 18, 0.68);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  min-height: 44px;
  padding: 11px 12px;
  border: 1px solid rgba(29, 23, 18, 0.16);
  border-radius: 6px;
  background: #fff;
  color: inherit;
}

.form textarea {
  min-height: 132px;
  resize: vertical;
}

.form__full {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.form__actions {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.form__status {
  min-height: 1.5em;
  color: rgba(29, 23, 18, 0.72);
}

.footer {
  padding: 22px 0;
  background: #15110d;
  color: rgba(255, 255, 255, 0.9);
}

.footer__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: space-between;
}

.footer__brand {
  font-family: "Songti SC", "STSong", "Source Han Serif SC", serif;
  font-size: 1.1rem;
}

.footer__meta {
  color: rgba(255, 255, 255, 0.68);
}

.dialog {
  width: min(980px, calc(100% - 24px));
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
}

.dialog::backdrop {
  background: rgba(12, 10, 8, 0.72);
}

.dialog__panel {
  position: relative;
  display: grid;
  gap: 18px;
  padding: 16px;
  margin: 0;
  border-radius: 6px;
  background: #fff;
  box-shadow: var(--shadow);
}

.dialog__panel img {
  width: 100%;
  max-height: min(72vh, 720px);
  object-fit: contain;
  background: #fff;
}

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

.dialog__close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(29, 23, 18, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
}

@media (max-width: 1100px) {
  h1 {
    font-size: 3.35rem;
  }

  h2 {
    font-size: 2rem;
  }

  .section__grid,
  .series-layout,
  .case-detail,
  .contact__inner {
    grid-template-columns: 1fr;
  }

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

  .promise-grid,
  .process-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 760px) {
  .shell {
    width: min(100% - 24px, 1180px);
  }

  h1 {
    font-size: 2.45rem;
  }

  h2 {
    font-size: 1.65rem;
  }

  h3 {
    font-size: 1.18rem;
  }

  .topbar__inner,
  .section-head,
  .footer__inner {
    flex-direction: column;
    align-items: stretch;
  }

  .nav {
    justify-content: flex-start;
    gap: 14px 18px;
  }

  .hero {
    min-height: calc(100svh - 68px);
  }

  .hero__inner {
    padding-top: 92px;
  }

  .hero__stats,
  .values-grid,
  .case-grid,
  .promise-grid,
  .process-row,
  .form__grid,
  .meta-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }

  .media-frame--wide {
    aspect-ratio: auto;
    min-height: 0;
  }

  .case-card__media,
  .case-detail__media {
    aspect-ratio: 1132 / 834;
  }

  .filters {
    justify-content: flex-start;
  }

  .filters label {
    min-width: 100%;
  }

  .tablist {
    justify-content: flex-start;
  }

  .dialog {
    width: min(100% - 16px, 980px);
  }
}