/* ============================================================
   永欣 YONGXIN · 样式表
   结构：变量 → 基础 → 版式 → 组件 → 页面 → 响应式
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --paper: #f7f3ec;
  --paper-deep: #efe7db;
  --ink: #1a1611;
  --ink-soft: #4b443b;
  --muted: #7c7266;
  --line: rgba(26, 22, 17, 0.13);
  --line-strong: rgba(26, 22, 17, 0.28);
  --tan: #9a6b45;
  --tan-deep: #7a5233;
  --dark: #16130f;
  --dark-soft: #2a251f;

  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", Georgia, serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --latin: Georgia, "Times New Roman", serif;

  --hdr: 88px;
  --gutter: clamp(20px, 4.4vw, 72px);
  --max: 1480px;
  --ease: cubic-bezier(0.22, 0.61, 0.24, 1);
}

/* ---------- 2. 基础 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--hdr) + 24px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.subpage { padding-top: var(--hdr); }
body.no-scroll { overflow: hidden; }

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--tan); color: var(--paper); }

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

/* ---------- 3. 版式 ---------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  margin: 0;
  line-height: 1.24;
  letter-spacing: 0.01em;
}

p { margin: 0; }
p + p { margin-top: 1.1em; }

.display {
  font-size: clamp(2.35rem, 5.2vw, 4.6rem);
  line-height: 1.18;
  letter-spacing: 0.005em;
}

.display em {
  font-style: normal;
  color: var(--tan);
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 14px;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--line-strong);
  flex: none;
}

.eyebrow--plain::before { display: none; }

.lede {
  font-family: var(--serif);
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 2;
  color: var(--ink-soft);
}

.body-text { color: var(--ink-soft); font-size: 15px; line-height: 2; }

.latin {
  font-family: var(--latin);
  font-style: italic;
  letter-spacing: 0.02em;
}

.mono {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

/* ---------- 4. 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: clamp(72px, 9vw, 132px) 0; }
.section--tight { padding: clamp(56px, 6vw, 88px) 0; }
.rule { height: 1px; background: var(--line); }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 32px 64px;
  align-items: end;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(36px, 4vw, 60px);
}

.section-head h2 { font-size: clamp(1.7rem, 2.8vw, 2.6rem); }
.section-head .body-text { max-width: 44ch; }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--hdr);
  display: flex;
  align-items: center;
  transition: background 0.45s var(--ease), border-color 0.45s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-solid {
  background: rgba(247, 243, 236, 0.9);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  line-height: 1;
}

.brand__zh {
  font-family: var(--serif);
  font-size: 23px;
  letter-spacing: 0.16em;
  margin-right: -0.16em;
}

.brand__en {
  font-size: 9.5px;
  letter-spacing: 0.3em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 44px);
}

.nav a {
  position: relative;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  padding: 6px 0;
  transition: color 0.3s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.nav a:hover { color: var(--ink); }
.nav a:hover::after,
.nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav a[aria-current="page"] { color: var(--ink); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
  margin-right: -8px;
}

.nav-toggle span {
  position: absolute;
  left: 9px;
  width: 22px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.4s var(--ease), opacity 0.3s;
}

.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 23px; }
body.menu-open .nav-toggle span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--paper);
  padding: calc(var(--hdr) + 40px) var(--gutter) 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.4s var(--ease), transform 0.5s var(--ease), visibility 0.4s;
}

body.menu-open .mobile-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mobile-menu a {
  display: block;
  font-family: var(--serif);
  font-size: 32px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.mobile-menu__foot {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  line-height: 2.2;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 50px;
  padding: 0 28px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), border-color 0.4s var(--ease);
}

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

.btn--solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--solid:hover { background: var(--tan-deep); border-color: var(--tan-deep); }

.btn--light { border-color: rgba(247, 243, 236, 0.34); color: var(--paper); }
.btn--light:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.link-underline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 0.4s var(--ease), gap 0.4s var(--ease);
}

.link-underline:hover { border-color: var(--ink); gap: 16px; }

/* ---------- 7. 首页：首屏 ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(0, 1.06fr);
  min-height: 100svh;
}

.hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--hdr) + 40px) clamp(24px, 4.5vw, 84px) 56px;
}

.hero__copy .eyebrow { margin-bottom: 30px; }
.hero h1 { margin-bottom: 28px; }
.hero .lede { max-width: 34ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

.hero__foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-top: auto;
  padding-top: 56px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

.hero__media {
  position: relative;
  overflow: hidden;
  background: var(--paper-deep);
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.04);
  animation: heroDrift 18s var(--ease) forwards;
}

@keyframes heroDrift {
  to { transform: scale(1); }
}

/* ---------- 8. 首页：主张 ---------- */
.statement {
  display: grid;
  grid-template-columns: minmax(0, 0.5fr) minmax(0, 1.5fr);
  gap: 32px 64px;
  padding: clamp(64px, 8vw, 118px) 0;
  border-bottom: 1px solid var(--line);
}

.statement__text {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.6vw, 2.15rem);
  line-height: 1.85;
  max-width: 26em;
}

.statement__meta {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 40px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 9. 作品卡片 ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(32px, 4vw, 56px) clamp(20px, 2.6vw, 40px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.works-grid--feature {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(40px, 5vw, 72px) clamp(24px, 4vw, 64px);
}

.works-grid--feature > :nth-child(even) { transform: translateY(clamp(20px, 5vw, 72px)); }

.card { position: relative; }

.card__media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--paper-deep);
  aspect-ratio: 4 / 5;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease), filter 1.1s var(--ease);
}

.card:hover .card__media img { transform: scale(1.045); }
.card:focus-within .card__media img { transform: scale(1.045); }

.card__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 12px;
  background: rgba(247, 243, 236, 0.92);
  backdrop-filter: blur(6px);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  border-radius: 999px;
}

.card__badge--sold { background: rgba(26, 22, 17, 0.82); color: var(--paper); }
.card__badge--making { background: rgba(154, 107, 69, 0.92); color: var(--paper); }

.card__body {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid transparent;
}

.card__title {
  font-family: var(--serif);
  font-size: 1.32rem;
  letter-spacing: 0.06em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.card__title .latin {
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.card__meta {
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.card__price {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.card__link {
  position: absolute;
  inset: 0;
  z-index: 2;
}

/* ---------- 10. 首页：皮料 ---------- */
.materials {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 2.4vw, 36px);
}

.mat__img {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--paper-deep);
}

.mat__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease); }
.mat:hover .mat__img img { transform: scale(1.04); }

.mat h3 { font-size: 1.05rem; margin-top: 16px; letter-spacing: 0.08em; }
.mat p { font-size: 12px; color: var(--muted); letter-spacing: 0.06em; margin-top: 6px; }

/* ---------- 11. 首页：工序 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.process__item {
  padding: 28px 24px 0 0;
  border-right: 1px solid var(--line);
}

.process__item:last-child { border-right: 0; padding-right: 0; }

.process__num {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--tan);
  font-variant-numeric: tabular-nums;
}

.process__item h3 { font-size: 1.1rem; margin: 14px 0 10px; letter-spacing: 0.06em; }
.process__item p { font-size: 13px; line-height: 1.9; color: var(--ink-soft); }

/* ---------- 12. 首页：定制 ---------- */
.cta {
  background: var(--dark);
  color: var(--paper);
  padding: clamp(64px, 8vw, 120px) 0;
}

.cta .eyebrow { color: rgba(247, 243, 236, 0.5); }
.cta .eyebrow::before { background: rgba(247, 243, 236, 0.3); }

.cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 40px 64px;
  align-items: end;
  margin-top: 28px;
}

.cta h2 { font-size: clamp(1.9rem, 3.6vw, 3.2rem); line-height: 1.3; max-width: 18em; }
.cta p { color: rgba(247, 243, 236, 0.66); font-size: 14.5px; line-height: 2; max-width: 40ch; }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: rgba(247, 243, 236, 0.72);
  padding: clamp(48px, 6vw, 80px) 0 28px;
  border-top: 1px solid rgba(247, 243, 236, 0.08);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 0.8fr));
  gap: 40px 32px;
}

.footer__brand .brand__zh { color: var(--paper); }
.footer__brand p {
  margin-top: 18px;
  font-size: 13px;
  line-height: 2;
  color: rgba(247, 243, 236, 0.45);
  max-width: 30ch;
}

.site-footer h4 {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: rgba(247, 243, 236, 0.42);
  margin-bottom: 16px;
  font-family: var(--sans);
}

.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { font-size: 13px; transition: color 0.3s; }
.site-footer a:hover { color: var(--paper); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: 22px;
  border-top: 1px solid rgba(247, 243, 236, 0.1);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(247, 243, 236, 0.35);
}

/* ---------- 14. 内页通用页头 ---------- */
.page-hero {
  padding: clamp(56px, 7vw, 96px) 0 clamp(32px, 4vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: 32px 64px;
  align-items: end;
}

.page-hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.8rem); margin: 22px 0 0; }
.page-hero .body-text { max-width: 40ch; }
.page-hero__count {
  margin-top: 20px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ---------- 15. 档案页：筛选 ---------- */
.filters {
  position: sticky;
  top: var(--hdr);
  z-index: 40;
  background: rgba(247, 243, 236, 0.94);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.filters .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
}

.filters [data-filter-group="category"] { flex: 1 1 100%; }
.filters .filter-search { margin-left: auto; }

.filter-group { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.filter-label {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-right: 2px;
  white-space: nowrap;
}

.chip {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.chip:hover { border-color: var(--line-strong); color: var(--ink); }

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.filter-search {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 5px;
  min-width: 160px;
}

.filter-search input {
  border: 0;
  background: none;
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ink);
  width: 100%;
  padding: 2px 0;
}

.filter-search input:focus { outline: none; }
.filter-search input::placeholder { color: var(--muted); }

.archive { padding: clamp(40px, 5vw, 64px) 0 clamp(72px, 9vw, 120px); }

.empty {
  padding: 96px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.empty strong { display: block; font-family: var(--serif); font-size: 1.4rem; color: var(--ink); margin-bottom: 10px; font-weight: 400; }

/* ---------- 16. 作品详情 ---------- */
.piece {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(32px, 5vw, 88px);
  padding-top: clamp(28px, 4vw, 48px);
  align-items: start;
}

.piece--empty { grid-template-columns: minmax(0, 640px); }
.piece--empty .piece__title h1 { font-size: clamp(1.8rem, 3vw, 2.4rem); }

.breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 26px;
}

.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { opacity: 0.5; }

.piece__gallery { position: sticky; top: calc(var(--hdr) + 28px); }

.piece__main {
  position: relative;
  overflow: hidden;
  background: var(--paper-deep);
  aspect-ratio: 4 / 5;
}

.piece__main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s var(--ease);
}

.piece__main img.is-fading { opacity: 0; }

.piece__thumbs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.piece__thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--paper-deep);
  opacity: 0.62;
  transition: opacity 0.35s var(--ease);
}

.piece__thumb img { width: 100%; height: 100%; object-fit: cover; }
.piece__thumb:hover { opacity: 1; }
.piece__thumb[aria-current="true"] { opacity: 1; }
.piece__thumb[aria-current="true"]::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--ink);
}

.piece__info { padding-bottom: 24px; }

.piece__title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.piece__title h1 { font-size: clamp(2.1rem, 3.4vw, 3rem); letter-spacing: 0.08em; }
.piece__title .latin { font-size: 0.8rem; letter-spacing: 0.26em; color: var(--muted); text-transform: uppercase; }

.piece__tags {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.piece__price {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.piece__price .num {
  font-family: var(--serif);
  font-size: 1.7rem;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--tan);
}

.status--sold::before { background: var(--muted); }
.status--making::before { background: var(--tan-deep); animation: pulse 2.4s infinite; }

@keyframes pulse { 50% { opacity: 0.3; } }

.piece__intro {
  margin-top: 26px;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  line-height: 2;
  color: var(--ink);
}

.piece__block { margin-top: 30px; }

.piece__block h3 {
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.piece__block p { font-size: 14.5px; line-height: 2; color: var(--ink-soft); }

.specs {
  margin: 36px 0 0;
  border-top: 1px solid var(--line);
}

.specs__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
}

.specs__row dt {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.16em;
  padding-top: 3px;
}

.specs__row dd { margin: 0; color: var(--ink-soft); line-height: 1.8; }
.specs__row dd small { display: block; color: var(--muted); font-size: 11.5px; letter-spacing: 0.04em; }

.accordion {
  margin-top: 32px;
  border-top: 1px solid var(--line);
}

.accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  border-bottom: 1px solid var(--line);
}

.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "+";
  font-size: 15px;
  color: var(--muted);
  transition: transform 0.35s var(--ease);
  line-height: 1;
}
.accordion[open] summary::after { transform: rotate(45deg); }
.accordion p { padding: 16px 0 20px; font-size: 13.5px; line-height: 2; color: var(--ink-soft); border-bottom: 1px solid var(--line); }

.actions,
.piece__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.piece__note {
  margin-top: 16px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.9;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  margin-top: clamp(56px, 7vw, 96px);
}

.pager a {
  padding: 30px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pager a + a { text-align: right; align-items: flex-end; border-left: 1px solid var(--line); }
.pager span { font-size: 10.5px; letter-spacing: 0.22em; color: var(--muted); text-transform: uppercase; }
.pager strong { font-family: var(--serif); font-size: 1.25rem; font-weight: 400; letter-spacing: 0.06em; }
.pager a:hover strong { color: var(--tan-deep); }

/* ---------- 17. 工艺页 ---------- */
.craft-hero {
  padding: clamp(56px, 8vw, 104px) 0 clamp(40px, 5vw, 64px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 32px 64px;
  align-items: end;
  border-bottom: 1px solid var(--line);
}

.craft-hero h1 { font-size: clamp(2.4rem, 5vw, 4rem); margin-top: 22px; }
.craft-hero p { max-width: 40ch; }

.craft-block { padding: clamp(56px, 7vw, 96px) 0; border-bottom: 1px solid var(--line); }
.craft-block:last-of-type { border-bottom: 0; }

.craft-block .sec-num {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--tan);
  margin-bottom: 18px;
  font-variant-numeric: tabular-nums;
}

.craft-block h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); margin-bottom: 24px; }

.leather-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 2.6vw, 36px);
  margin-top: 8px;
}

.leather-list .mat__img { aspect-ratio: 4 / 5; }
.leather-list h3 { font-size: 1.02rem; margin-top: 16px; }
.leather-list p { font-size: 12px; color: var(--muted); margin-top: 6px; line-height: 1.9; }

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

.step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  padding: 26px 32px 26px 0;
  border-bottom: 1px solid var(--line);
}

.step:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 40px; }
.step:nth-child(even) { padding-left: 40px; }

.step__num { font-size: 11px; letter-spacing: 0.16em; color: var(--tan); padding-top: 4px; }
.step h3 { font-size: 1.06rem; margin-bottom: 8px; letter-spacing: 0.04em; }
.step p { font-size: 13px; line-height: 1.95; color: var(--ink-soft); }

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 64px;
  align-items: start;
}

.two-col .body-text { max-width: 46ch; }

.craft-fig { margin: 32px 0 0; }
.craft-fig img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--paper-deep); }
.craft-fig figcaption {
  margin-top: 12px;
  font-size: 11.5px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.note-list { list-style: none; margin: 0; padding: 0; }
.note-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-soft);
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 12px;
}
.note-list li::before { content: "—"; color: var(--tan); }


/* ---------- 品类页 ---------- */
.cat-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 28px 64px;
  align-items: end;
  padding: clamp(36px, 5vw, 64px) 0 clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.cat-hero h1 {
  font-size: clamp(2.8rem, 6.4vw, 5rem);
  line-height: 1.1;
  margin-top: 18px;
  letter-spacing: 0.04em;
}

.cat-hero__meta { padding-bottom: 6px; }
.cat-hero__meta .body-text { max-width: 34ch; }

.cat-switch {
  margin-top: clamp(56px, 7vw, 88px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.cat-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.cat-chip:hover { border-color: var(--line-strong); color: var(--ink); }

.cat-chip[aria-current="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.cat-chip__n {
  font-size: 10.5px;
  opacity: 0.55;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 900px) {
  .cat-hero { grid-template-columns: 1fr; gap: 18px; }
  .cat-hero__meta { padding-bottom: 0; }
}

/* ---------- 18. 滚动出现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-in { opacity: 1; transform: none; }
.reveal.instant { transition: none; }

.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__media img { animation: none; transform: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ---------- 19. 响应式 ---------- */
@media (max-width: 1180px) {
  .materials, .leather-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .process__item { padding-bottom: 26px; border-bottom: 1px solid var(--line); }
  .works-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  :root { --hdr: 64px; }

  .nav { display: none; }
  .nav-toggle { display: block; }

  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero__media { order: -1; height: 56svh; min-height: 300px; }
  .hero__copy { padding: 36px var(--gutter) 48px; }
  .hero__foot { padding-top: 36px; }
  .hero__media img { animation: none; transform: none; }

  .statement { grid-template-columns: 1fr; gap: 24px; }
  .section-head { grid-template-columns: 1fr; gap: 18px; align-items: start; }

  .works-grid--feature > :nth-child(even) { transform: none; }

  .cta__grid { grid-template-columns: 1fr; gap: 28px; }

  .page-hero { grid-template-columns: 1fr; gap: 20px; }

  .filters { position: static; }
  .filters .wrap { display: block; }
  .filters .wrap > .filter-group { margin-bottom: 10px; }
  .filter-search { width: 100%; margin-top: 6px; }
  .filters .wrap > .filter-group { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; -webkit-overflow-scrolling: touch; width: 100%; }
  .filters .wrap > .filter-group::-webkit-scrollbar { display: none; }

  .piece { grid-template-columns: 1fr; }
  .piece__gallery { position: static; }

  .craft-hero { grid-template-columns: 1fr; gap: 22px; }
  .steps, .two-col { grid-template-columns: 1fr; }
  .step:nth-child(odd) { border-right: 0; padding-right: 0; }
  .step:nth-child(even) { padding-left: 0; }

  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .footer__brand { grid-column: 1 / -1; }

  .pager strong { font-size: 1.05rem; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .works-grid { grid-template-columns: 1fr; gap: 40px; }
  .materials, .leather-list, .process { grid-template-columns: 1fr; }
  .process__item { border-right: 0; padding-right: 0; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__brand { grid-column: auto; }
  .hero__actions .btn { flex: 1 1 auto; }
  .specs__row { grid-template-columns: 78px minmax(0, 1fr); }
  .piece__thumbs { gap: 8px; }
  .pager { grid-template-columns: 1fr; }
  .pager a + a { border-left: 0; border-top: 1px solid var(--line); text-align: left; align-items: flex-start; }
}