/* === Design Tokens === */
:root {
  --black: #111111;
  --white: #ffffff;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #cccccc;
  --gray-500: #999999;
  --gray-600: #777777;
  --gray-700: #555555;
  --gray-900: #333333;

  --font-serif-en: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-serif-cn: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', serif;
  --font-sans-en: Inter, 'Helvetica Neue', Arial, sans-serif;
  --font-sans-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --text-base: 16px;
  --text-sm: 13px;
  --text-lg: 20px;
  --text-xl: 28px;
  --text-2xl: 40px;
  --text-3xl: 56px;

  --leading-relaxed: 1.8;
  --leading-normal: 1.6;
  --leading-tight: 1.2;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 96px;
  --space-2xl: 128px;

  --max-width: 1080px;
  --max-width-narrow: 720px;

  --transition: 0.25s ease;
}

/* === Reset === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans-en), var(--font-sans-cn);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--gray-900);
  background: var(--white);
  overflow-x: hidden;
}

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--font-serif-en), var(--font-serif-cn);
  font-weight: 350;
  line-height: var(--leading-tight);
  color: var(--black);
}

/* Chinese headings: use 300 weight to match Cormorant Garamond's lighter feel */
.project h2 {
  font-weight: 300;
  font-family: var(--font-serif-cn), var(--font-serif-en);
}
.about-section h3, .contact-section h3 {
  font-weight: 300;
}

.serif { font-family: var(--font-serif-en), var(--font-serif-cn); }
.sans  { font-family: var(--font-sans-en), var(--font-sans-cn); }

.cn { font-family: var(--font-sans-cn), var(--font-sans-en); }

p {
  margin-bottom: var(--space-sm);
}

a {
  color: var(--gray-700);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-300);
  transition: border-color var(--transition);
}
a:hover { border-color: var(--black); color: var(--black); }

/* === Scroll Progress === */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.6);
  z-index: 10001;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* === Page Loader === */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--black);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
.page-loader--done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-line {
  width: 0;
  max-width: 120px;
  height: 1px;
  background: rgba(255,255,255,0.5);
  animation: loaderExpand 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}
@keyframes loaderExpand {
  0%   { width: 0; }
  100% { width: 100px; }
}

/* === Hero === */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  background: var(--black);
  color: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
}

/* Generative canvas animation background */
.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Dark overlay for text readability */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1;
  pointer-events: none;
}

/* Hero text above video */
.hero-name,
.hero-name-cn,
.hero-sub,
.hero-tag,
.hero-slogan,
.hero-scroll,
.hero-lang {
  position: relative;
  z-index: 2;
}

.hero-name {
  font-family: var(--font-serif-en), var(--font-serif-cn);
  font-size: clamp(32px, 5vw, var(--text-3xl));
  font-weight: 300;
  letter-spacing: 6px;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.hero-name-cn {
  font-family: var(--font-serif-cn), var(--font-serif-en);
  font-size: clamp(20px, 3vw, var(--text-xl));
  font-weight: 300;
  letter-spacing: 12px;
  color: var(--white);
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: var(--text-sm);
  letter-spacing: 3px;
  color: var(--gray-500);
  text-transform: uppercase;
}

.hero-tag {
  font-size: var(--text-sm);
  color: var(--gray-600);
  margin-top: var(--space-md);
  letter-spacing: 2px;
}

.hero-slogan {
  font-family: var(--font-sans-cn), var(--font-sans-en);
  font-size: 13px;
  line-height: 1.9;
  color: var(--gray-600);
  margin-top: var(--space-md);
  max-width: 600px;
  text-align: center;
  letter-spacing: 0.5px;
}

.hero-lang {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--gray-600);
  background: none;
  border: 1px solid var(--gray-600);
  padding: 6px 14px;
  cursor: pointer;
  font-family: var(--font-sans-en);
  text-transform: uppercase;
  transition: border-color var(--transition), color var(--transition);
}
.hero-lang:hover { border-color: var(--white); color: var(--white); }

.hero-scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.25);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.2; height: 40px; }
  50% { opacity: 0.8; height: 56px; }
}

/* === Project Grid (ChromaGrid spotlight) === */
.project-grid {
  padding: var(--space-md);
  background: var(--white);
}
.project-grid-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  position: relative;
  z-index: 2;
}
.grid-card {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
  display: block;
  text-decoration: none;
  border-bottom: none;
  background: var(--gray-200);
  --mouse-x: 50%;
  --mouse-y: 50%;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              box-shadow 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              border-color 0.5s ease;
  z-index: 1;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  border: 2px solid transparent;
}
.grid-card:hover {
  transform: scale(1.05);
  z-index: 10;
  border-color: var(--black);
  box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}
.grid-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x) var(--mouse-y), rgba(255,255,255,0.25), transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 3;
}
.grid-card:hover::before {
  opacity: 1;
}
.grid-card-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
/* Chroma card — individual image spotlight */
.chroma-card {
  --mouse-x: 50%;
  --mouse-y: 50%;
}
.chroma-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle 300px at var(--mouse-x) var(--mouse-y), rgba(255,255,255,0.35), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
  border-radius: inherit;
}
.chroma-card:hover::after {
  opacity: 1;
}
.grid-card-num {
  position: absolute;
  top: 16px;
  left: 20px;
  color: #fff;
  font-size: 11px;
  letter-spacing: 2px;
  font-family: var(--font-sans-en);
  z-index: 2;
  opacity: 0.7;
}
.grid-card-title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px 20px 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: #fff;
  font-size: 15px;
  font-family: var(--font-serif-cn), var(--font-serif-en);
  letter-spacing: 1px;
  z-index: 2;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.grid-card:hover .grid-card-title {
  opacity: 1;
  transform: translateY(0);
}

/* === Dot Navigation === */
.dot-nav {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 12px 10px;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
}
.dot-nav a {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  border-bottom: none;
  transition: background 0.3s ease, transform 0.3s ease;
  text-indent: -9999px;
  overflow: hidden;
}
.dot-nav a:hover,
.dot-nav a.active {
  background: #fff;
  transform: scale(1.8);
}

/* === Project Section === */
.project {
  padding: var(--space-xl) var(--space-md);
  position: relative;
}
/* Section divider — subtle gradient instead of hard line */
.project::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gray-300), transparent);
}
.project:last-of-type::after {
  display: none;
}
/* First project: reduced top padding — hero already provides breathing room */
.project:first-of-type {
  padding-top: var(--space-lg);
}

/* Full-bleed: every 3rd project breaks the container */
.project:nth-of-type(3n) .project-hero-img {
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  max-width: 100vw;
  border-radius: 0;
  aspect-ratio: 21 / 9;
}
.project:nth-of-type(3n) .project-container {
  max-width: none;
  padding: 0;
}
.project:nth-of-type(3n) .project-body,
.project:nth-of-type(3n) .gallery-label,
.project:nth-of-type(3n) .cascade-grid,
.project:nth-of-type(3n) .project-meta,
.project:nth-of-type(3n) .project-header {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}
/* Gallery stays wide on full-bleed projects too */
.project:nth-of-type(3n) .project-gallery {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}
.project:nth-of-type(3n) .project-hero-img {
  margin-bottom: var(--space-lg);
}

.project-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.project-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.project-number {
  font-size: var(--text-sm);
  color: var(--gray-500);
  letter-spacing: 2px;
  font-family: var(--font-sans-en);
}

.project h2 {
  font-size: clamp(22px, 3vw, var(--text-xl));
  font-weight: 400;
  letter-spacing: 1px;
}

.project-title-en {
  font-size: var(--text-sm);
  color: var(--gray-500);
  font-style: italic;
  margin-left: var(--space-xs);
  font-family: var(--font-serif-en), var(--font-serif-cn);
}

/* Hero image */
.project-hero-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--gray-200);
  margin-bottom: var(--space-lg);
  display: block;
  border-radius: 2px;
}

/* Project hero video (alternative to image) */
.project-hero-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--gray-200);
  margin-bottom: var(--space-lg);
  display: block;
  border-radius: 2px;
}

/* Two column layout */
.project-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.project-desc-cn {
  font-family: var(--font-sans-cn), var(--font-sans-en);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--gray-900);
}

.project-desc-en {
  font-family: var(--font-sans-en);
  font-size: 14px;
  line-height: 1.65;
  color: var(--gray-600);
}

.project-desc-cn p + p,
.project-desc-en p + p {
  margin-top: var(--space-sm);
}

/* === Cascade Stack — fanned overlapping cards === */
.cascade-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  position: relative;
  min-height: 380px;
  overflow: hidden;
  padding: 16px 0;
}
.cascade-grid img {
  width: 360px;
  height: 300px;
  object-fit: cover;
  background: #fff;
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  flex: 0 0 auto;
  border: 6px solid #fff;
  box-shadow: 0 4px 24px rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.05);
  transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1),
              box-shadow 0.45s ease,
              filter 0.5s ease,
              z-index 0.3s ease,
              margin 0.4s ease;
  filter: blur(15px);
}
.cascade-grid img.loaded {
  filter: blur(0);
}

/* 4-image fan */
.cascade-4 img {
  margin-left: -80px;
}
.cascade-4 img:first-child { margin-left: 0; }
.cascade-4 img:nth-child(1) { z-index: 4; transform: rotate(-2deg) translateY(10px); }
.cascade-4 img:nth-child(2) { z-index: 3; transform: rotate(1deg) translateY(-6px); }
.cascade-4 img:nth-child(3) { z-index: 2; transform: rotate(-1.5deg) translateY(8px); }
.cascade-4 img:nth-child(4) { z-index: 1; transform: rotate(2deg) translateY(-4px); }
.cascade-4 img.loaded:nth-child(1) { transform: rotate(-2deg) translateY(10px); }
.cascade-4 img.loaded:nth-child(2) { transform: rotate(1deg) translateY(-6px); }
.cascade-4 img.loaded:nth-child(3) { transform: rotate(-1.5deg) translateY(8px); }
.cascade-4 img.loaded:nth-child(4) { transform: rotate(2deg) translateY(-4px); }
.cascade-4 img:hover {
  z-index: 10 !important;
  transform: rotate(0deg) translateY(-20px) scale(1.08) !important;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2), 0 4px 12px rgba(0,0,0,0.1);
}

/* 3-image fan */
.cascade-3 img {
  margin-left: -100px;
}
.cascade-3 img:first-child { margin-left: 0; }
.cascade-3 img:nth-child(1) { z-index: 3; transform: rotate(-3deg) translateY(4px); }
.cascade-3 img:nth-child(2) { z-index: 2; transform: rotate(0deg) translateY(-16px); }
.cascade-3 img:nth-child(3) { z-index: 1; transform: rotate(3deg) translateY(4px); }
.cascade-3 img.loaded:nth-child(1) { transform: rotate(-3deg) translateY(4px); }
.cascade-3 img.loaded:nth-child(2) { transform: rotate(0deg) translateY(-16px); }
.cascade-3 img.loaded:nth-child(3) { transform: rotate(3deg) translateY(4px); }
.cascade-3 img:hover {
  z-index: 10 !important;
  transform: rotate(0deg) translateY(-20px) scale(1.08) !important;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2), 0 4px 12px rgba(0,0,0,0.1);
}

/* Side-by-side gallery row */
.gallery-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.gallery-col .project-gallery {
  flex-wrap: wrap;
  margin-left: 0;
  margin-right: 0;
  justify-content: flex-start;
}
.gallery-col .project-gallery img {
  height: 340px;
  max-width: 100%;
  min-width: 0;
}
@media (max-width: 768px) {
  .gallery-row { grid-template-columns: 1fr; }
}

/* Module split layout — overview left, details stacked right */
.module-split {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}
.module-main img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  display: block;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.4s ease;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.module-main img:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}
.module-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.module-stack img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  display: block;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.4s ease;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.module-stack img:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}
@media (max-width: 768px) {
  .module-split { grid-template-columns: 1fr; }
  .module-stack { grid-template-rows: repeat(5, 120px); }
}

/* Gallery section label */
.gallery-label {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--gray-700);
  text-transform: uppercase;
  font-family: var(--font-sans-en);
  margin-bottom: var(--space-sm);
  margin-top: var(--space-md);
  padding-left: 2px;
  position: relative;
}
.gallery-label::after {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--gray-300);
  margin-left: var(--space-sm);
  vertical-align: middle;
}
.gallery-label:first-of-type {
  margin-top: 0;
}

/* Gallery — horizontal scroll */
.project-gallery {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 6px;
  margin-bottom: var(--space-lg);
  margin-left: calc(-50vw + 50% + var(--space-md));
  margin-right: calc(-50vw + 50% + var(--space-md));
  padding-bottom: var(--space-xs);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.project-gallery::-webkit-scrollbar {
  display: none;
}
.project-gallery:active {
  cursor: grabbing;
}

/* Meta */
.project-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--gray-500);
  letter-spacing: 1px;
  font-family: var(--font-sans-en);
  flex-wrap: wrap;
}
.project-meta span { white-space: nowrap; }
.project-meta .dot { color: var(--gray-300); }

/* === About & Contact === */
.about-contact {
  padding: var(--space-2xl) var(--space-md);
  background: var(--gray-100);
}

.about-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.about-section h3,
.contact-section h3 {
  font-size: clamp(18px, 2vw, var(--text-lg));
  font-weight: 400;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
  color: var(--black);
}

.about-section p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray-700);
}

.about-section .cn {
  color: var(--gray-600);
}
.about-section em {
  font-size: 12px;
  line-height: 1.65;
  color: var(--gray-600);
}

.contact-section p {
  font-size: var(--text-base);
  line-height: 2;
  color: var(--gray-700);
  font-family: var(--font-sans-en);
}

.contact-section a {
  display: inline-block;
  margin-right: var(--space-sm);
}

/* === Footer === */
.footer {
  padding: var(--space-md);
  text-align: center;
  font-size: 11px;
  letter-spacing: 1px;
  background: var(--black);
  color: var(--gray-600);
  font-family: var(--font-sans-en);
}

/* === Animations === */

/* Keyframes */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes revealClip {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}
@keyframes scaleReveal {
  from { transform: scale(1.08); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
@keyframes slideLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Initial hidden state — animated by JS */
[data-animate] {
  opacity: 0;
}
[data-animate].visible {
  animation-duration: 0.8s;
  animation-fill-mode: forwards;
  animation-timing-function: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* Animation variants */
[data-animate="fade-up"].visible     { animation-name: fadeUp; }
[data-animate="fade-in"].visible     { animation-name: fadeIn; }
[data-animate="slide-left"].visible  { animation-name: slideLeft; }

/* Stagger delays */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.15s; }
.stagger-3 { animation-delay: 0.25s; }
.stagger-4 { animation-delay: 0.35s; }
.stagger-5 { animation-delay: 0.45s; }

/* Hero entrance — plays on load */
.hero-name, .hero-name-cn, .hero-sub, .hero-tag {
  animation: fadeUp 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}
.hero-name     { animation-delay: 0.1s; }
.hero-name-cn  { animation-delay: 0.25s; }
.hero-sub      { animation-delay: 0.4s; }
.hero-tag      { animation-delay: 0.55s; }
.hero-slogan   { animation-delay: 0.65s; }
.hero-scroll   { animation-delay: 0.85s; }

/* Image reveal */
.project-hero-img {
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), opacity 0.7s ease;
}
.project-hero-img[data-animate].visible {
  animation-name: scaleReveal;
  animation-duration: 0.9s;
  animation-timing-function: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* Gallery item wrapper */
.gallery-item {
  position: relative;
  flex: 0 0 auto;
  height: 360px;
  overflow: hidden;
  border-radius: 2px;
  cursor: pointer;
  user-select: none;
}
.gallery-item img {
  -webkit-user-drag: none;
  user-select: none;
}

/* Gallery images — horizontal scroll items */
.project-gallery img {
  height: 100%;
  width: auto;
  max-width: 100%;
  min-width: 480px;
  aspect-ratio: auto;
  object-fit: cover;
  background: var(--gray-100);
  display: block;
  transition: filter 0.5s ease, transform 0.5s ease, opacity 0.4s ease;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: auto;
}

/* BIG-style blur-up loading */
img[data-src] {
  filter: blur(15px);
  transform: scale(1.05);
}

/* Gallery caption overlay (ZHA-style) */
.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 100%);
  color: #fff;
  font-size: 12px;
  letter-spacing: 1px;
  font-family: var(--font-sans-en);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}
.gallery-item:hover .gallery-caption {
  opacity: 1;
  transform: translateY(0);
}
.gallery-item:hover img {
  transform: scale(1.03);
}

/* Project number animation */
.project-number {
  display: inline-block;
  transition: transform 0.3s ease, color 0.3s ease;
}
.project:hover .project-number {
  transform: translateX(-4px);
  color: var(--gray-900);
}

/* Header stagger */
.project-header > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.project-header.visible > * {
  opacity: 1;
  transform: translateY(0);
}
.project-header.visible > *:nth-child(1) { transition-delay: 0.05s; }
.project-header.visible > *:nth-child(2) { transition-delay: 0.1s; }
.project-header.visible > *:nth-child(3) { transition-delay: 0.15s; }

/* Description fade */
.project-desc-cn, .project-desc-en {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease 0.2s, transform 0.6s ease 0.2s;
}
.project-body.visible .project-desc-cn,
.project-body.visible .project-desc-en {
  opacity: 1;
  transform: translateY(0);
}

/* Gallery reveal */
.project-gallery {
  opacity: 0;
  transition: opacity 0.6s ease 0.35s;
}
.project-gallery.visible {
  opacity: 1;
}

/* Meta fade */
.project-meta {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease 0.45s, transform 0.5s ease 0.45s;
}
.project-meta.visible {
  opacity: 1;
  transform: translateY(0);
}

/* About section reveal */
.about-section, .contact-section {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.about-section.visible, .contact-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Link hover effect */
.contact-section a {
  position: relative;
  border-bottom-color: transparent;
}
.contact-section a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--black);
  transition: width 0.3s ease;
}
.contact-section a:hover::after {
  width: 100%;
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* === Lazy Loading === */
img[data-src] {
  opacity: 0;
  transition: opacity 0.4s ease;
}
img.loaded {
  opacity: 1;
}

/* === Lightbox === */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.lightbox--open {
  pointer-events: auto;
  opacity: 1;
}

.lightbox-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  cursor: pointer;
}

.lightbox-img {
  position: relative;
  z-index: 1;
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  cursor: default;
  border-radius: 2px;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  z-index: 2;
  color: #999;
  font-size: 40px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s;
  font-family: Inter, sans-serif;
}
.lightbox-close:hover {
  color: #fff;
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(255,255,255,0.1);
  border: none;
  color: #ccc;
  font-size: 48px;
  cursor: pointer;
  padding: 16px 12px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
  font-family: Inter, sans-serif;
  line-height: 1;
}
.lightbox-prev { left: 12px; }
.lightbox-next { right: 12px; }
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .project-body {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .gallery-item { height: 300px; }
  .project-gallery img { min-width: 400px; }
  .cascade-grid img { width: 280px; height: 240px; }
  .cascade-4 img { margin-left: -60px; }
  .cascade-3 img { margin-left: -70px; }
  .project-grid-container { grid-template-columns: repeat(3, 1fr); }
  .project:nth-of-type(3n) .project-hero-img {
    aspect-ratio: 16 / 9;
  }
  .about-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .hero { padding: var(--space-lg) var(--space-sm); }
  .hero-name { font-size: 28px; letter-spacing: 3px; }
  .hero-name-cn { font-size: 18px; letter-spacing: 6px; }
  .project { padding: var(--space-lg) var(--space-sm); }
  .gallery-item { height: 240px; }
  .project-gallery img { min-width: 320px; }
  .cascade-grid { flex-wrap: wrap; min-height: auto; justify-content: flex-start; }
  .cascade-grid img { width: 46%; height: 200px; margin: 2% !important; }
  .cascade-grid img:nth-child(n) { transform: none !important; z-index: auto !important; }
  .cascade-grid img:hover { transform: scale(1.04) !important; }
  .project-meta { gap: var(--space-sm); font-size: 11px; }
  .about-contact { padding: var(--space-lg) var(--space-sm); }
  .dot-nav { display: none; }
  .project-grid-container { grid-template-columns: repeat(3, 1fr); }
  .project:nth-of-type(3n) .project-hero-img {
    width: 100%;
    margin-left: 0;
    aspect-ratio: 16 / 9;
  }
  :root {
    --text-base: 15px;
  }
}

@media (max-width: 480px) {
  .hero-name { font-size: 24px; letter-spacing: 2px; }
  .hero-name-cn { font-size: 16px; letter-spacing: 4px; }
  .gallery-item { height: 200px; }
  .project-gallery img { max-width: 80vw; }
  .cascade-grid img { width: 90%; height: 200px; margin: 8px auto !important; }
  .project-meta { flex-direction: column; gap: 2px; }
  .project-meta .dot { display: none; }
  .dot-nav { display: none; }
  .project-grid-container { grid-template-columns: repeat(2, 1fr); }
  .grid-card-title { font-size: 12px; opacity: 0.8; transform: none; }
  .project:nth-of-type(3n) .project-hero-img {
    width: 100%;
    margin-left: 0;
    aspect-ratio: 16 / 9;
  }
  :root {
    --space-xl: 48px;
    --space-2xl: 64px;
  }
}