/* ==========================================================================
   Wei Qu Design Studio — front-end design system
   Restrained editorial minimalism: warm paper ground, ink type, thin rules.
   ========================================================================== */

:root {
  /* surface */
  --paper: #f6f4f0;
  --paper-2: #efece6;
  --card: #fffefc;
  --ink: #17181a;
  --ink-2: #3d3f43;
  --ink-3: #6d7075;
  --ink-4: #9b9da1;
  --rule: rgba(23, 24, 26, 0.12);
  --rule-soft: rgba(23, 24, 26, 0.07);
  --accent: #a4552f;
  --accent-soft: rgba(164, 85, 47, 0.09);

  /* type */
  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* metrics */
  --shell: 1280px;
  --gut: clamp(20px, 5vw, 72px);
  --band: clamp(72px, 9vw, 148px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: 16px;
}

/* ------------------------------------------------------------------ layout */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gut);
}

.band {
  padding-block: var(--band);
}

.band--tight {
  padding-block: clamp(48px, 6vw, 96px);
}

.band--paper2 {
  background: var(--paper-2);
}

.hr {
  height: 1px;
  background: var(--rule);
  border: 0;
  margin: 0;
}

/* --------------------------------------------------------------- typography */

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.display {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

.display--xl {
  font-size: clamp(2.4rem, 6.2vw, 5rem);
  line-height: 1.08;
}
.display--l {
  font-size: clamp(1.75rem, 3.4vw, 2.9rem);
}
.display--m {
  font-size: clamp(1.35rem, 2.2vw, 1.95rem);
}

.lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  color: var(--ink-2);
  line-height: 1.85;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 24px 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: clamp(36px, 5vw, 64px);
}

.section-head__index {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  color: var(--ink-4);
}

/* ---------------------------------------------------------------- controls */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.28s var(--ease), color 0.28s var(--ease),
    transform 0.28s var(--ease);
}
.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn--ghost:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), gap 0.24s var(--ease);
}
.link-arrow:hover {
  color: var(--accent);
  border-color: var(--accent);
  gap: 16px;
}
.link-arrow::after {
  content: "→";
}

/* ------------------------------------------------------------------ header */

.masthead {
  position: sticky;
  top: 0;
  z-index: 90;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--rule-soft);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 15px;
  flex: none;
}
.brand__logo {
  flex: none;
  height: 38px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
}
.brand__zh {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.06em;
  display: block;
  line-height: 1.3;
}
.brand__en {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--ink-4);
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 38px);
}
.nav a {
  position: relative;
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  padding-block: 6px;
  transition: color 0.22s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.28s var(--ease);
}
.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
}
.nav a:hover::after,
.nav a[aria-current="page"]::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  position: absolute;
  left: 50%;
  width: 16px;
  height: 1px;
  background: var(--ink);
  transform: translateX(-50%);
  content: "";
}
.nav__toggle span {
  top: 50%;
}
.nav__toggle span::before {
  top: -5px;
}
.nav__toggle span::after {
  top: 5px;
}

@media (max-width: 860px) {
  .nav__toggle {
    display: block;
  }
  .nav {
    position: fixed;
    inset: 76px 0 auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px var(--gut) 28px;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
  }
  .nav[data-open="true"] {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .nav a {
    width: 100%;
    padding-block: 15px;
    border-bottom: 1px solid var(--rule-soft);
    font-size: 16px;
  }
}

/* -------------------------------------------------------------------- hero */

.hero {
  position: relative;
  padding-block: clamp(56px, 8vw, 110px) clamp(48px, 6vw, 88px);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
}

.hero__title .line-2 {
  display: block;
  color: var(--ink-3);
  font-size: 0.62em;
  letter-spacing: 0.16em;
  margin-bottom: 0.35em;
}

.hero__sub {
  margin-top: 28px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero__media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--paper-2);
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 1.2s var(--ease);
}
.hero__media:hover img {
  transform: scale(1.06);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(44px, 6vw, 80px);
  background: var(--rule);
  border-block: 1px solid var(--rule);
}
.hero__stats div {
  background: var(--paper);
  padding: 26px 8px 26px 0;
}
.hero__stats b {
  display: block;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 500;
  line-height: 1.1;
}
.hero__stats span {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-3);
}

@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }
  .hero__media {
    aspect-ratio: 3 / 2;
  }
}

/* -------------------------------------------------------------- categories */

.cats {
  border-top: 1px solid var(--rule);
}

.cat {
  display: grid;
  grid-template-columns: 88px 1.1fr 1fr 150px;
  align-items: center;
  gap: clamp(16px, 3vw, 44px);
  padding-block: clamp(22px, 3vw, 34px);
  border-bottom: 1px solid var(--rule);
  position: relative;
  transition: padding-inline 0.4s var(--ease);
}
.cat::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--card);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  z-index: -1;
}
.cat:hover {
  padding-inline: 18px;
}
.cat:hover::before {
  opacity: 1;
}

.cat__no {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--ink-4);
  line-height: 1;
}
.cat__zh {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  margin: 0 0 6px;
  font-weight: 500;
}
.cat__en {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
  text-transform: uppercase;
}
.cat__desc {
  font-size: 14px;
  color: var(--ink-3);
  margin: 0;
  line-height: 1.7;
}
.cat__go {
  justify-self: end;
}

.cat__thumb {
  position: absolute;
  right: 170px;
  top: 50%;
  width: 190px;
  aspect-ratio: 4 / 3;
  transform: translateY(-50%) scale(0.94);
  opacity: 0;
  pointer-events: none;
  overflow: hidden;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.cat:hover .cat__thumb {
  opacity: 1;
  transform: translateY(-50%) scale(1);
}
.cat__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 900px) {
  .cat {
    grid-template-columns: 56px 1fr;
    row-gap: 10px;
  }
  .cat__desc {
    grid-column: 2;
  }
  .cat__go {
    grid-column: 2;
    justify-self: start;
  }
  .cat__thumb {
    display: none;
  }
}

/* ------------------------------------------------------------------- works */

.works {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(28px, 3.4vw, 52px) clamp(20px, 2.4vw, 36px);
}

.work {
  display: flex;
  flex-direction: column;
  gap: 16px;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.work.is-in {
  opacity: 1;
  transform: none;
}

.work__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
}
.work__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease), filter 0.5s var(--ease);
}
.work:hover .work__media img {
  transform: scale(1.05);
}

.work__tag {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 6px 13px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-2);
}

.work__title {
  font-family: var(--serif);
  font-size: 1.13rem;
  font-weight: 500;
  line-height: 1.55;
  margin: 0;
  transition: color 0.24s var(--ease);
}
.work:hover .work__title {
  color: var(--accent);
}

.work__summary {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.work__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--rule-soft);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-4);
}
.work__meta em {
  font-style: normal;
  color: var(--ink-2);
}

/* ------------------------------------------------------------------- about */

.about {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.about__media {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--paper-2);
  position: sticky;
  top: 110px;
}
.about__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about__body p {
  color: var(--ink-2);
  line-height: 1.95;
}
.about__list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
}
.about__list li {
  background: var(--paper);
  padding: 22px 0;
}
.about__list h4 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 500;
}
.about__list p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.75;
}

@media (max-width: 900px) {
  .about {
    grid-template-columns: 1fr;
  }
  .about__media {
    position: static;
    aspect-ratio: 3 / 2;
  }
}

/* --------------------------------------------------------------------- cta */

.cta {
  background: var(--ink);
  color: var(--paper);
}
.cta .eyebrow {
  color: rgba(246, 244, 240, 0.6);
}
.cta__inner {
  display: grid;
  grid-template-columns: 1.4fr auto;
  gap: 32px;
  align-items: end;
}
.cta .btn {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.cta .btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}
.cta p {
  color: rgba(246, 244, 240, 0.72);
}
@media (max-width: 760px) {
  .cta__inner {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------------ filter */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(32px, 4vw, 56px);
}
.filter {
  padding: 10px 20px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.26s var(--ease);
}
.filter:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.filter[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.filter b {
  font-weight: 400;
  opacity: 0.55;
  margin-left: 6px;
  font-size: 11px;
}

.cat-note {
  display: grid;
  gap: 6px;
  padding: 22px 0 30px;
  border-top: 1px solid var(--rule);
  margin-bottom: clamp(28px, 4vw, 48px);
}
.cat-note strong {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
}
.cat-note span {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
  text-transform: uppercase;
}
.cat-note p {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--ink-3);
  max-width: 68ch;
}

.empty {
  padding: 80px 0;
  text-align: center;
  color: var(--ink-3);
  border-top: 1px solid var(--rule);
}

/* ------------------------------------------------------------------ detail */

.crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 34px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-4);
}
.crumbs a:hover {
  color: var(--accent);
}

.detail__head {
  padding-block: clamp(28px, 4vw, 52px) clamp(32px, 4vw, 56px);
}
.detail__title {
  max-width: 22ch;
}
.detail__summary {
  margin-top: 26px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
  margin-top: clamp(32px, 4vw, 52px);
}
.facts > div {
  background: var(--paper);
  padding: 22px 22px 22px 0;
}
.facts dt {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 8px;
}
.facts dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.6;
}

.detail__cover {
  margin-top: clamp(36px, 5vw, 64px);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--paper-2);
}
.detail__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blocks {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  max-width: 74ch;
}
.block h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  margin: 0 0 12px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
}
.block p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.95;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.gallery figure {
  margin: 0;
  cursor: zoom-in;
}
.gallery__media {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
}
.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.gallery figure:hover img {
  transform: scale(1.05);
}
.gallery figcaption {
  padding-top: 12px;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vw, 56px);
  background: rgba(20, 20, 22, 0.94);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.lightbox[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}
.lightbox img {
  max-width: 100%;
  max-height: 82vh;
  object-fit: contain;
}
.lightbox__cap {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  text-align: center;
  padding-top: 16px;
}
.lightbox__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  background: transparent;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
}
.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  background: transparent;
  color: #fff;
  cursor: pointer;
}
.lightbox__nav--prev {
  left: 16px;
}
.lightbox__nav--next {
  right: 16px;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
}
.pager a {
  background: var(--paper);
  padding: 30px 24px;
  display: grid;
  gap: 8px;
  transition: background 0.3s var(--ease);
}
.pager a:hover {
  background: var(--card);
}
.pager span {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.pager strong {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.02rem;
  line-height: 1.6;
}
.pager a:last-child {
  text-align: right;
}
@media (max-width: 700px) {
  .pager {
    grid-template-columns: 1fr;
  }
  .pager a:last-child {
    text-align: left;
  }
}

/* ----------------------------------------------------------------- contact */

.contact {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: start;
}
.info {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.info li {
  background: var(--paper);
  padding: 20px 0;
}
.info dt {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 8px;
}
.info dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.6;
}
.info a:hover {
  color: var(--accent);
}

.form {
  background: var(--card);
  padding: clamp(24px, 3.4vw, 44px);
  border: 1px solid var(--rule-soft);
}
.form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}
.field {
  display: grid;
  gap: 8px;
}
.field--full {
  grid-column: 1 / -1;
}
.field label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}
.field label b {
  color: var(--accent);
  font-weight: 400;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--paper);
  font-size: 14.5px;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}
.field textarea {
  min-height: 132px;
  resize: vertical;
  line-height: 1.75;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--ink);
  background: var(--card);
}
.form__foot {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.form__msg {
  font-size: 13px;
  color: var(--ink-3);
}
.form__msg[data-state="ok"] {
  color: #2f6b45;
}
.form__msg[data-state="err"] {
  color: #a4302f;
}

@media (max-width: 900px) {
  .contact {
    grid-template-columns: 1fr;
  }
  .form__grid {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------------ footer */

.footer {
  background: var(--ink);
  color: rgba(246, 244, 240, 0.78);
  padding-block: clamp(48px, 6vw, 84px) 28px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr repeat(2, minmax(0, 0.8fr));
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(246, 244, 240, 0.14);
}
.footer .brand__mark {
  border-color: rgba(246, 244, 240, 0.5);
  color: var(--paper);
}
.footer .brand__logo {
  filter: brightness(0) invert(1);
}
.footer .brand__zh {
  color: var(--paper);
}
.footer__tag {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--paper);
}
.footer h5 {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(246, 244, 240, 0.5);
  font-weight: 500;
}
.footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}
.footer ul a {
  font-size: 13.5px;
  transition: color 0.22s var(--ease);
}
.footer ul a:hover {
  color: var(--paper);
}
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding-top: 24px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(246, 244, 240, 0.45);
}
.footer__bottom a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 244, 240, 0.24);
}
.footer__bottom a:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}
@media (max-width: 800px) {
  .footer__top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ----------------------------------------------------------------- reveal */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal],
  .work {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ----------------------------------------------------------- phone (≤480px) */

@media (max-width: 480px) {
  .works {
    grid-template-columns: 1fr;
    gap: clamp(24px, 7vw, 36px);
  }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero__actions .btn {
    width: 100%;
    text-align: center;
  }
  .cat {
    grid-template-columns: 1fr;
    gap: 6px;
    padding-block: 22px;
  }
  .cat__no {
    display: none;
  }
  .cat__go {
    justify-self: start;
  }
  .cta__inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .info li {
    padding: 16px 0;
  }
  .pager a {
    padding: 18px 0;
  }
}