/* =========================================================
   SOYO DESIGN — portfolio

   Typeface: Plus Jakarta Sans (self-hosted variable font).
   Weight / tracking hierarchy follows the Pentagram and Landor
   house style: medium-weight display type set very tight, small
   uppercase labels set very wide, body copy left neutral.
   No italic anywhere — emphasis is carried by weight and colour.

   Layout follows the project's Figma page map:
     模块 1 · 顶部导航      — shared header, every page
     模块 2 · Hero 轮播区   — home carousel + project detail 大图
     模块 3 · 作品网格列表  — works page grid
     模块 4 · 品牌宣言区    — home + about statement
     模块 5 · 页脚          — shared footer, every page
   ========================================================= */

/* ---------- 0. Fonts ---------- */
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../fonts/PlusJakartaSans-VariableFont_wght.ttf") format("truetype-variations"),
       url("../fonts/PlusJakartaSans-VariableFont_wght.ttf") format("truetype");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- 1. Tokens ---------- */
:root {
  /* colour */
  --ink:        #0B0B0C;
  --ink-2:      #17171A;
  --ink-3:      #26262B;
  --paper:      #FFFFFF;
  --accent:     #FF4A1C;
  --accent-ink: #C8340F;
  --sage:       #9BA88C;

  --text:       var(--ink);
  --text-mute:  rgba(11, 11, 12, .58);
  --text-faint: rgba(11, 11, 12, .38);
  --line:       rgba(11, 11, 12, .14);
  --line-soft:  rgba(11, 11, 12, .08);
  --line-inv:   rgba(255, 255, 255, .18);
  --text-inv:   var(--paper);
  --text-inv-mute: rgba(255, 255, 255, .62);

  /* type — one family, hierarchy via weight / size / tracking */
  --font-display: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto,
                  "Helvetica Neue", Arial, sans-serif;
  --font-body:    var(--font-display);
  --font-label:   var(--font-display);

  /* tracking rhythm (Pentagram / Landor style: tight display, wide labels) */
  --tracking-display: -.045em;
  --tracking-tight:   -.03em;
  --tracking-body:    -.005em;
  --tracking-label:   .1em;

  /* fluid scale */
  --step--1: clamp(.78rem, .76rem + .1vw, .84rem);
  --step-0:  clamp(.95rem, .92rem + .16vw, 1.06rem);
  --step-1:  clamp(1.1rem, 1.02rem + .4vw, 1.35rem);
  --step-2:  clamp(1.5rem, 1.25rem + 1.1vw, 2.2rem);
  --step-3:  clamp(2.1rem, 1.5rem + 2.6vw, 3.9rem);
  --step-4:  clamp(2.6rem, 1.4rem + 5.4vw, 6.4rem);
  --step-5:  clamp(3.1rem, 1.1rem + 9.2vw, 10.5rem);

  /* space */
  --gutter: clamp(1.25rem, 4.2vw, 4.5rem);
  --section-y: clamp(4.5rem, 10vw, 10rem);
  --page-top: calc(var(--header-h) + clamp(1.75rem, 4.5vw, 3.25rem));
  --maxw: 1440px;
  --header-h: clamp(3.75rem, 6vw, 4.4rem);

  /* misc */
  --radius: 4px;
  --radius-lg: 8px;
  --ease: cubic-bezier(.19, 1, .22, 1);
  --ease-out: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html:focus-within { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

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

h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; letter-spacing: inherit; }
button { background: none; border: 0; cursor: pointer; }

/* the site is set entirely upright — no synthetic or authored italics */
em, i, cite, dfn, address, blockquote, q { font-style: normal; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent); color: #fff; }

/* ---------- 3. Utilities ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.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: fixed;
  top: .75rem; left: .75rem;
  z-index: 1200;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--paper);
  padding: .7rem 1.1rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  transition: transform .3s var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

/* every page clears the fixed header */
.view > :first-child:not(.hero-carousel) { padding-top: var(--page-top); }

.section { padding-block: var(--section-y); }

/* emphasis without italics — same family, same slant, accent colour */
.hl { color: var(--accent-ink); }

/* buttons */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .7rem;
  padding: 1rem 1.5rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  border-radius: 100px;
  border: 1px solid transparent;
  overflow: hidden;
  isolation: isolate;
  transition: color .45s var(--ease-out), border-color .45s var(--ease-out);
}
.btn svg {
  width: 1.15em; height: 1.15em;
  fill: none; stroke: currentColor;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .45s var(--ease-out);
}
.btn::before {
  content: "";
  position: absolute; inset: 0;
  z-index: -1;
  background: var(--accent);
  transform: translateY(101%);
  transition: transform .55s var(--ease);
}
.btn--solid { background: var(--btn-bg); color: var(--btn-fg); }
.btn--ghost { border-color: var(--line); color: var(--text); }
.btn--ghost::before { background: var(--ink); }
.btn--full { width: 100%; }

@media (hover: hover) {
  .btn:hover { color: #fff; }
  .btn--ghost:hover { border-color: transparent; }
  .btn:hover::before { transform: translateY(0); }
  .btn:hover svg { transform: translateX(4px); }
}

/* ---------- 4. Cursor glow ---------- */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 460px; height: 460px;
  margin: -230px 0 0 -230px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  background: radial-gradient(circle, rgba(255, 74, 28, .16), rgba(255, 74, 28, 0) 62%);
  transition: opacity .6s var(--ease-out);
  mix-blend-mode: multiply;
}
.cursor-glow.is-on { opacity: 1; }

/* ---------- 5. 模块 1 · 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;              /* above the search overlay (900) so the nav stays crisp */
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 1px 0 var(--line-soft);
  transition: background-color .5s var(--ease-out), box-shadow .5s var(--ease-out);
}
.site-header.is-scrolled { box-shadow: 0 1px 0 var(--line), 0 10px 30px -24px rgba(11,11,12,.5); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(.95rem, .8rem + .5vw, 1.15rem);
  letter-spacing: -.02em;
  text-transform: uppercase;
  flex: none;
}
.wordmark__mark {
  width: .62em; height: .62em;
  background: var(--accent);
  border-radius: 50%;
  transition: transform .5s var(--ease);
}
.wordmark:hover .wordmark__mark { transform: scale(1.45); }

.nav-desktop ul { display: flex; align-items: center; gap: clamp(.9rem, 2.2vw, 2.2rem); }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: -.005em;
  padding-block: .25rem;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
}
.nav-link:hover::after,
.nav-link.is-active::after { transform: scaleX(1); }

/* text-free search entry — a square hit area so the icon reads as centred */
.nav-link--icon {
  width: 2.2rem;
  height: 2.2rem;
}
.nav-link--icon svg {
  width: 1.15rem; height: 1.15rem;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round;
}

.menu-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.menu-toggle__bars { display: grid; gap: 5px; width: 22px; }
.menu-toggle__bars span {
  display: block; height: 1.5px; width: 100%;
  background: currentColor;
  transition: transform .45s var(--ease), opacity .3s;
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:first-child { transform: translateY(3.25px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:last-child  { transform: translateY(-3.25px) rotate(-45deg); }

.header-progress {
  position: absolute;
  left: 0; bottom: 0;
  height: 2px; width: 0;
  background: var(--accent);
  transition: width .1s linear;
}

/* ---------- 6. Mobile menu ---------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 990;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--header-h) + 1.5rem) var(--gutter) clamp(2rem, 6vw, 3rem);
  background: var(--paper);
  opacity: 0;
  visibility: hidden;
  transition: opacity .5s var(--ease-out), visibility .5s;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu.is-open { opacity: 1; visibility: visible; }

.mobile-menu__nav { display: grid; gap: .2rem; }
.mobile-menu__nav a {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  padding-block: .35rem;
  border-bottom: 1px solid var(--line-soft);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease-out), transform .6s var(--ease);
}
.mobile-menu.is-open .mobile-menu__nav a { opacity: 1; transform: none; }
.mobile-menu.is-open .mobile-menu__nav a:nth-child(1) { transition-delay: .06s; }
.mobile-menu.is-open .mobile-menu__nav a:nth-child(2) { transition-delay: .11s; }
.mobile-menu.is-open .mobile-menu__nav a:nth-child(3) { transition-delay: .16s; }
.mobile-menu.is-open .mobile-menu__nav a:nth-child(4) { transition-delay: .21s; }
.mobile-menu.is-open .mobile-menu__nav a:nth-child(5) { transition-delay: .26s; }
.mobile-menu__foot {
  display: grid;
  gap: .4rem;
  color: var(--text-mute);
}
.mobile-menu__foot a { text-decoration: underline; text-underline-offset: .25em; }

/* ---------- 7. Pages (hash routed views) ---------- */
.view[hidden] { display: none; }
.view { animation: view-in .5s var(--ease-out) both; }
@keyframes view-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 8. 模块 2 · Hero 轮播区 ---------- */
.hero-carousel { padding-top: var(--header-h); }

.carousel {
  position: relative;
  height: calc(100svh - var(--header-h));
  min-height: 24rem;
  overflow: hidden;
  background: var(--ink-2);
}
.carousel__track {
  display: flex;
  height: 100%;
  transition: transform 1s var(--ease);
  touch-action: pan-y;
}

.slide {
  position: relative;
  flex: 0 0 100%;
  height: 100%;
  display: block;
  overflow: hidden;
}
.slide__media { position: absolute; inset: 0; display: block; }
.slide__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.4s var(--ease);
}
@media (hover: hover) {
  .slide:hover .slide__media img { transform: scale(1.03); }
}
.slide__scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(to top, rgba(6, 6, 7, .84) 0%, rgba(6, 6, 7, .34) 34%, rgba(6, 6, 7, 0) 62%),
    linear-gradient(to bottom, rgba(6, 6, 7, .28) 0%, rgba(6, 6, 7, 0) 24%);
}

/* 项目文字（左下角） */
.slide__caption {
  position: absolute;
  left: var(--gutter);
  bottom: clamp(2rem, 6vh, 3.6rem);
  z-index: 2;
  display: grid;
  gap: .5rem;
  color: var(--paper);
  max-width: min(28ch, 62vw);
}
.slide__cat {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: rgba(255, 255, 255, .72);
}
.slide__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5.2vw, 4.2rem);
  font-weight: 600;
  line-height: .98;
  letter-spacing: var(--tracking-display);
}
.slide__cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: .3rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.slide__cta svg {
  width: 1.05em; height: 1.05em;
  fill: none; stroke: currentColor;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .5s var(--ease);
}
.slide:hover .slide__cta svg { transform: translateX(5px); }

/* 左右箭头，图片两边高度居中 */
.carousel__nav {
  position: absolute;
  top: 50%;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(2.8rem, 5vw, 3.6rem);
  aspect-ratio: 1;
  transform: translateY(-50%);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .4);
  background: rgba(11, 11, 12, .3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--paper);
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out),
              border-color .4s var(--ease-out);
}
.carousel__nav svg {
  width: 1.25rem; height: 1.25rem;
  fill: none; stroke: currentColor;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
}
.carousel__nav--prev { left: clamp(1rem, 2.5vw, 2.4rem); }
.carousel__nav--next { right: clamp(1rem, 2.5vw, 2.4rem); }
.carousel__nav:hover,
.carousel__nav:focus-visible { background: var(--paper); border-color: var(--paper); color: var(--ink); }

.carousel__count {
  position: absolute;
  right: var(--gutter);
  bottom: clamp(2rem, 6vh, 3.6rem);
  z-index: 3;
  display: inline-flex;
  align-items: baseline;
  gap: .35rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  color: var(--paper);
}
.carousel__count b { font-weight: 700; color: var(--accent); }
.carousel__count span { color: rgba(255, 255, 255, .6); }

.carousel__bar {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  z-index: 3;
  background: rgba(255, 255, 255, .16);
}
.carousel__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width .6s var(--ease);
}

/* ---------- 9. 模块 4 · 品牌宣言区 ---------- */
.statement { padding-block: var(--section-y); }

.statement__title {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: .95;
  letter-spacing: var(--tracking-display);
  max-width: 22ch;
  text-wrap: balance;
}
.statement__lede {
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  max-width: 58ch;
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--text-mute);
  text-wrap: pretty;
}
.statement__cta {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

/* ---------- 10. 模块 3 · 作品网格列表 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-bottom: clamp(1.4rem, 3vw, 2.2rem);
}
.chip {
  padding: .6rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-mute);
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out),
              border-color .4s var(--ease-out);
}
.chip:hover { color: var(--text); border-color: var(--text); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.tile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2.4rem);
}

.tile { display: grid; gap: clamp(.8rem, 2vw, 1.1rem); }
.tile.is-hidden { display: none; }

.tile__media {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  aspect-ratio: 16 / 11;
}
.tile__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}

.tile__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--line);
  transition: border-color .4s var(--ease-out);
}
.tile__name {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: 1.05;
}
.tile__arrow {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(2.4rem, 5vw, 3rem);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: background-color .45s var(--ease-out), border-color .45s var(--ease-out),
              color .45s var(--ease-out), transform .45s var(--ease);
}
.tile__arrow svg {
  width: 1.2rem; height: 1.2rem;
  fill: none; stroke: currentColor;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
}
@media (hover: hover) {
  .tile:hover .tile__media img { transform: scale(1.04); }
  .tile:hover .tile__foot { border-color: var(--ink); }
  .tile:hover .tile__arrow {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
    transform: translateX(4px);
  }
}

.work-empty {
  padding-block: 3rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- 11. 作品详情页 · 大图 / 项目名称 ---------- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: clamp(1.4rem, 3vw, 2rem);
  padding: 0;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-mute);
  transition: color .35s var(--ease-out);
}
.back-link svg {
  width: 1em; height: 1em;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .4s var(--ease);
}
.back-link:hover { color: var(--text); }
.back-link:hover svg { transform: translateX(-4px); }

.project-detail[hidden] { display: none; }

.detail-head { padding-bottom: clamp(1.4rem, 3vw, 2.2rem); }
.detail-cat {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-faint);
}
.detail-title {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: .95;
  letter-spacing: var(--tracking-display);
  margin-top: .7rem;
  text-wrap: balance;
}

.detail-info {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding-top: clamp(1.4rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
}
.detail-desc {
  max-width: 62ch;
  color: var(--text-mute);
  line-height: 1.7;
  text-wrap: pretty;
}
.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  justify-content: flex-end;
}
.project__tags li {
  padding: .4rem .85rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--text-mute);
  white-space: nowrap;
}

/* ---------- 12. Gallery ---------- */
.gallery { display: grid; gap: .7rem; }

.gallery__stage {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  padding: 0;
  background: #FFFFFF;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: zoom-in;
}
.gallery__stage img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform 1s var(--ease);
}
@media (hover: hover) {
  .gallery__stage:hover img { transform: scale(1.012); }
}

.gallery__hint,
.gallery__count {
  position: absolute;
  bottom: 1rem;
  padding: .4rem .8rem;
  border-radius: 100px;
  background: rgba(11, 11, 12, .74);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: var(--paper);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  transition: opacity .45s var(--ease-out), transform .45s var(--ease-out);
}
.gallery__count { left: 1rem; }
.gallery__count b { font-weight: 700; }
.gallery__hint { right: 1rem; }
@media (hover: hover) {
  .gallery__hint { opacity: 0; transform: translateY(6px); }
  .gallery__stage:hover .gallery__hint { opacity: 1; transform: none; }
}
@media (hover: none) {
  .gallery__hint { display: none; }
}

.gallery__thumbs {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding-bottom: .4rem;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.gallery__thumbs li { flex: 0 0 auto; scroll-snap-align: start; }
.gallery__thumbs button {
  display: block;
  width: clamp(4.8rem, 11vw, 8.5rem);
  aspect-ratio: 4 / 3;
  padding: 0;
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  opacity: .5;
  transition: opacity .4s var(--ease-out), border-color .4s var(--ease-out);
}
.gallery__thumbs img { width: 100%; height: 100%; object-fit: cover; }
.gallery__thumbs button:hover { opacity: 1; }
.gallery__thumbs button.is-active {
  opacity: 1;
  border-color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink);
}

/* ---------- 13. Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1100;              /* above the header so the image viewer stays full-bleed */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 5vw, 4rem);
  background: rgba(8, 8, 9, .94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity .4s var(--ease-out);
}
.lightbox[hidden] { display: none; }
.lightbox.is-open { opacity: 1; }

.lightbox__figure {
  display: grid;
  gap: 1rem;
  justify-items: center;
  max-width: 100%;
  max-height: 100%;
}
.lightbox__figure img {
  width: auto;
  max-width: 100%;
  max-height: min(74svh, 860px);
  object-fit: contain;
  border-radius: var(--radius);
  background: #FFFFFF;
}
.lightbox__caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  color: var(--text-inv-mute);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.lightbox__counter { color: var(--text-inv); white-space: nowrap; }
.lightbox__counter b { font-weight: 700; }

.lightbox__close,
.lightbox__nav {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(2.6rem, 6vw, 3.1rem);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--line-inv);
  background: rgba(11, 11, 12, .45);
  color: var(--text-inv);
  transition: background-color .35s var(--ease-out), color .35s var(--ease-out),
              border-color .35s var(--ease-out);
}
.lightbox__close svg,
.lightbox__nav svg {
  width: 1.25rem; height: 1.25rem;
  fill: none; stroke: currentColor;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
}
.lightbox__close { top: clamp(1rem, 3vw, 2rem); right: clamp(1rem, 3vw, 2rem); }
.lightbox__nav--prev { left: clamp(.6rem, 3vw, 2rem); top: 50%; transform: translateY(-50%); }
.lightbox__nav--next { right: clamp(.6rem, 3vw, 2rem); top: 50%; transform: translateY(-50%); }
.lightbox__close:hover,
.lightbox__nav:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* the [hidden] attribute must win over the display above */
.lightbox__nav[hidden],
.lightbox__close[hidden] { display: none; }

/* ---------- 14. 搜索结果页 · 全屏搜索遮罩层 ---------- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 4rem) var(--gutter) clamp(3rem, 12vh, 7rem);
  background: rgba(255, 255, 255, .68);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  opacity: 0;
  visibility: hidden;
  transition: opacity .45s var(--ease-out), visibility .45s;
}
.search-overlay[hidden] { display: none; }
.search-overlay.is-open { opacity: 1; visibility: visible; }

/* 返回按钮 —— 与导航同层，浮在模糊背景之上，不被模糊 */
.search-back {
  position: fixed;
  top: calc(var(--header-h) + clamp(.75rem, 2.5vw, 1.5rem));
  left: var(--gutter);
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: 0;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity .35s var(--ease-out), transform .45s var(--ease-out),
              color .35s var(--ease-out);
}
.search-back[hidden] { display: none; }
.search-back.is-open { opacity: 1; transform: none; }
.search-back:hover { color: var(--accent); }
.search-back svg {
  width: 1em; height: 1em;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .4s var(--ease);
}
.search-back:hover svg { transform: translateX(-4px); }

/* 搜索核心区 */
.search-overlay__form {
  display: flex;
  align-items: center;
  gap: clamp(.8rem, 2vw, 1.4rem);
  width: min(100%, 62rem);
  transform: translateY(14px);
  transition: transform .7s var(--ease);
}
.search-overlay.is-open .search-overlay__form { transform: none; }

/* 极简输入框：无边框、背景透明，只保留底部细横线 */
.search-overlay__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0 0 .7rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.6vw, 3.4rem);
  font-weight: 600;
  letter-spacing: var(--tracking-display);
  color: var(--ink);
}
.search-overlay__input:focus { outline: none; }
.search-overlay__input::placeholder {
  color: var(--text-faint);
  font-weight: 400;
  letter-spacing: var(--tracking-body);
}
.search-overlay__input::-webkit-search-cancel-button,
.search-overlay__input::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }

/* 纯文字 Search 按钮（黑色底，沿用 .btn 的悬停动效，无图标） */
.search-overlay__submit {
  flex: none;
  text-transform: none;
  letter-spacing: .01em;
}

/* ---------- 15. About page ---------- */
.about-copy {
  display: grid;
  gap: 1.1rem;
  max-width: 62ch;
  margin-top: clamp(2rem, 5vw, 3.4rem);
  padding-top: clamp(1.6rem, 4vw, 2.6rem);
  border-top: 1px solid var(--line);
  color: var(--text-mute);
  text-wrap: pretty;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: clamp(1.6rem, 3.5vw, 2.4rem);
}
.pill-list li {
  padding: .5rem 1rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--text-mute);
  transition: border-color .4s var(--ease-out), color .4s var(--ease-out),
              transform .4s var(--ease-out);
}
@media (hover: hover) {
  .pill-list li:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
}

/* ---------- 16. Contact page ---------- */
.contact {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  background: var(--ink);
  color: var(--text-inv);
  overflow: hidden;
}
.contact__bg { position: absolute; inset: 0; pointer-events: none; }
.contact__bg span {
  position: absolute;
  width: clamp(20rem, 55vw, 46rem); aspect-ratio: 1;
  right: -12%; top: -18%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 74, 28, .3), rgba(255, 74, 28, 0) 68%);
  filter: blur(60px);
}
.contact > .shell { position: relative; z-index: 1; }

.contact__title {
  font-family: var(--font-display);
  font-size: var(--step-5);
  font-weight: 600;
  line-height: .9;
  letter-spacing: var(--tracking-display);
}
.contact__title .hl { color: var(--accent); }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  margin-top: clamp(2.4rem, 6vw, 4rem);
  padding-top: clamp(1.6rem, 4vw, 2.4rem);
  border-top: 1px solid var(--line-inv);
}

.contact-mail {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  border-bottom: 1px solid var(--line-inv);
  padding-bottom: .15em;
  transition: color .4s var(--ease-out), border-color .4s var(--ease-out);
}
.contact-mail:hover { color: var(--accent); border-color: var(--accent); }

.contact-note {
  margin-top: 1.2rem;
  max-width: 40ch;
  color: var(--text-inv-mute);
  text-wrap: pretty;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}
.socials a {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem 1.1rem;
  border: 1px solid var(--line-inv);
  border-radius: 100px;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out),
              border-color .4s var(--ease-out);
}
.socials svg {
  width: .95em; height: .95em;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.socials a:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* WeChat — click the ID to copy it */
.wechat {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding: .55rem 1.1rem;
  border: 1px dashed var(--line-inv);
  border-radius: 100px;
}
.wechat__label {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-inv-mute);
}
.wechat__id {
  padding: 0 0 1px;
  font-family: var(--font-label);
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text-inv);
  border-bottom: 1px solid var(--line-inv);
  transition: color .35s var(--ease-out), border-color .35s var(--ease-out);
}
.wechat__id:hover { color: var(--accent); border-color: var(--accent); }
.wechat__note {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0;
  transition: opacity .35s var(--ease-out);
}
.wechat__note.is-on { opacity: 1; }

.contact-form { display: grid; gap: 1.1rem; align-content: start; }
.form-hint {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 500;
  line-height: 1.7;
  color: var(--text-inv-mute);
  border-left: 2px solid var(--accent);
  padding-left: .9rem;
}
.field { display: grid; gap: .4rem; }
.field label {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-inv-mute);
}
.field input,
.field textarea {
  width: 100%;
  padding: .85rem 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-inv);
  color: var(--text-inv);
  font-size: var(--step-1);
  resize: vertical;
  transition: border-color .4s var(--ease-out);
}
.field input::placeholder,
.field textarea::placeholder { color: rgba(255, 255, 255, .34); }
.field input:focus,
.field textarea:focus { outline: none; border-color: var(--accent); }
.field.has-error input,
.field.has-error textarea { border-color: var(--accent); }
.field__error {
  min-height: 1em;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--accent);
}
.form-status {
  min-height: 1.4em;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--text-inv-mute);
}

/* ---------- 17. 模块 5 · 页脚 ---------- */
.site-footer {
  background: var(--ink-2);
  color: var(--text-inv);
  padding-block: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line-inv);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: end;
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}
.footer-wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  line-height: .95;
}
.footer-tag {
  margin-top: .8rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 500;
  line-height: 1.8;
  letter-spacing: .04em;
  color: var(--text-inv-mute);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  justify-content: flex-end;
}
.footer-pill {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem 1.1rem;
  border: 1px solid var(--line-inv);
  border-radius: 100px;
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-inv);
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out),
              border-color .4s var(--ease-out);
}
.footer-pill svg {
  width: .95em; height: .95em;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.footer-pill:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: clamp(1.2rem, 3vw, 1.8rem);
  border-top: 1px solid var(--line-inv);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-inv-mute);
}
.to-top {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: 0;
  color: var(--text-inv);
}
.to-top svg {
  width: 1em; height: 1em;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .45s var(--ease);
}
.to-top:hover svg { transform: translateY(-4px); }

/* ---------- 18. Reveal motion ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .9s var(--ease-out), transform .9s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ---------- 19. Responsive ---------- */
@media (max-width: 980px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: inline-flex; }

  .contact-grid { grid-template-columns: 1fr; }
  .detail-info { grid-template-columns: 1fr; }
  .project__tags { justify-content: flex-start; }
  .footer-top { grid-template-columns: 1fr; align-items: start; }
  .footer-contact { justify-content: flex-start; }
}

@media (max-width: 760px) {
  .tile-grid { grid-template-columns: 1fr; }
  .tile__foot { padding-bottom: .7rem; }
  .gallery__stage { aspect-ratio: 4 / 3; }
  .lightbox__figure img { max-height: 62svh; }

  .carousel { min-height: 30rem; }
  .slide__caption { max-width: 82vw; bottom: 5.5rem; }
  .carousel__count { bottom: 1.6rem; }
  .carousel__nav--prev { left: .7rem; }
  .carousel__nav--next { right: .7rem; }

  .search-overlay { padding: calc(var(--header-h) + 3rem) var(--gutter) 4rem; }
  .search-overlay__form { flex-direction: column; align-items: stretch; gap: 1.4rem; }
  .search-overlay__submit { width: 100%; }
}

@media (max-width: 520px) {
  .statement__cta { flex-direction: column; align-items: stretch; }
  .statement__cta .btn { width: 100%; }
  .filters { gap: .4rem; }
  .chip { padding: .5rem .9rem; }
  .gallery__hint { display: none; }
  .footer-contact { flex-direction: column; align-items: stretch; }
  .footer-pill { justify-content: center; }
}

@media (hover: none) {
  .cursor-glow { display: none; }
}

/* ---------- 20. Motion / contrast preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .carousel__track { transition: none; }
}

@media (prefers-contrast: more) {
  :root { --text-mute: rgba(11, 11, 12, .78); --line: rgba(11, 11, 12, .4); }
}

/* ---------- 21. Print ---------- */
@media print {
  .site-header, .mobile-menu, .hero-carousel, .cursor-glow,
  .contact-form, .lightbox, .search-overlay, .search-back { display: none !important; }
  [data-view][hidden], .project-detail[hidden] { display: block !important; }
  body { background: #fff; }
  .contact, .site-footer { background: #fff; color: #000; }
}