/* ==========================================
   Self-hosted Fonts — no CDN, no flip-flop
   ========================================== */

@font-face {
  font-family: 'Noto Serif SC';
  src: url('/fonts/NotoSerifSC-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Noto Serif SC';
  src: url('/fonts/NotoSerifSC-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-display: swap;
}

/* ==========================================
   Design Tokens (CSS Variables)
   全局一键改：颜色 / 字体 / 间距 / 字号
   ========================================== */

:root {
  /* ── Color Palette ── */
  --color-bg:        #FBF7F2;    /* 暖米白底 */
  --color-ink:        #2D2A26;    /* 最深墨色（正文/加粗） */
  --color-text:       #2D2A26;    /* 墨灰正文 */
  --color-text-light: #8A8580;    /* 次级文字 */
  --color-accent:     #C4A078;    /* 大地色点缀（只此一个） */
  --color-card-bg:    #F5F0EA;    /* 卡片底色 */
  --color-border:     #E8E3DD;    /* 细线 / 分隔 */
  --color-thumb-bg:   #EDE8E2;    /* 缩略图占位底色 */

  /* ── Typography ── */
  --font-display:   'Playfair Display', Georgia, serif;
  --font-serif-cjk: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-serif:     'Playfair Display', 'Noto Serif SC', Georgia, serif;
  --font-sans:      'Inter', 'PingFang SC', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, sans-serif;

  /* ── Type Scale (大字号梯度) ── */
  --text-xs:   0.75rem;     /* 12px */
  --text-sm:   0.875rem;    /* 14px */
  --text-base: 1rem;        /* 16px */
  --text-md:   1.125rem;    /* 18px */
  --text-lg:   1.375rem;    /* 22px */
  --text-xl:   1.75rem;     /* 28px */
  --text-2xl:  2.25rem;     /* 36px */
  --text-3xl:  3rem;        /* 48px */
  --text-4xl:  4rem;        /* 64px */

  /* ── Spacing Scale ── */
  --space-xs: 0.5rem;       /* 8px */
  --space-sm: 1rem;         /* 16px */
  --space-md: 2rem;         /* 32px */
  --space-lg: 5rem;         /* 80px */
  --space-xl: 9rem;         /* 144px */

  /* ── Layout ── */
  --max-width:      680px;   /* 正文舒适行宽 */
  --max-width-wide: 880px;   /* 卡片等较宽内容 */
  --header-height:  3.5rem;

  /* ── Transitions ── */
  --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-slow: 0.6s var(--ease-out);
}

/* ==========================================
   Reset & Base
   ========================================== */

*,
*::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);
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ==========================================
   Typography
   ========================================== */

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
}

.section-heading {
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--ease-slow);
}

a:hover {
  color: var(--color-text);
}

/* ==========================================
   Header
   ========================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  transition: background 0.4s var(--ease-out);
  mix-blend-mode: normal;
}

.site-header.scrimmed {
  background: rgba(251, 247, 242, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-name {
  font-family: var(--font-serif);
  font-size: var(--text-md);
  color: var(--color-text);
  text-decoration: none;
}

.site-name::after {
  content: 'Harvey Gong';
}

.site-nav {
  display: flex;
  align-items: center;
}

/* ── Nav list ── */

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-link {
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--ease-slow);
}

.nav-link:hover {
  color: var(--color-text);
}

/* ── Nav dropdown ── */

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  display: flex;
  flex-direction: column;
  background: rgba(251, 247, 242, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  padding-top: var(--space-sm);
  padding-bottom: var(--space-xs);
  white-space: nowrap;
  z-index: 110;

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, visibility 0s linear .22s;
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-dropdown:hover,
.nav-item.has-dropdown.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity .22s ease, transform .22s ease, visibility 0s;
  pointer-events: auto;
}

.nav-dropdown a {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--color-text-light);
  text-decoration: none;
  padding: 0.35em 1.4em;
  transition: color 0.2s var(--ease-out);
}

.nav-dropdown a:hover {
  color: var(--color-accent);
}

/* ==========================================
   Hero
   ========================================== */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.hero-name-zh {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-4xl);
  font-weight: 300;
  color: var(--color-ink);
  line-height: 1.1;
  margin-bottom: var(--space-xs);
}

.hero-name-zh::after {
  content: '龚施菡';
}

.hero-name-en {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.hero-name-en::after {
  content: 'Harvey Gong';
}

.hero-headline {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-text-light);
  letter-spacing: .06em;
  margin-bottom: 0.35rem;
}

.hero-email {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-text-light);
  letter-spacing: .06em;
  margin-bottom: 7rem;
}

.hero-thesis {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
  max-width: 14em;
  animation: heroFade .6s ease;
}

@keyframes heroFade {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   Sections (shared)
   ========================================== */

.about,
.work,
.contact {
  padding: var(--space-md);
  padding-top: 7rem;
  padding-bottom: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.about .section-heading {
  text-align: center;
}

.approach {
  padding: var(--space-md);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  max-width: 1440px;
  margin: 0 auto;
}

/* ==========================================
   About
   ========================================== */

.about-hero {
  display: grid;
  grid-template-columns: 1.32fr 0.68fr;
  gap: var(--space-md);
  align-items: start;
  margin-bottom: 5rem;
}

.about-hero-quote {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.about-hero-sub {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-md);
  color: var(--color-text-light);
  line-height: 1.6;
}

.about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1px 8px;
  margin-top: var(--space-xs);
  align-items: baseline;
}

.about-hero-tags span {
  font-family: var(--font-serif-cjk);
  color: #C4A078;
  font-size: .85rem;
  opacity: .55;
  white-space: nowrap;
}

.about-hero-tags span:nth-child(1) { font-size: 1.2rem;  opacity: .78; margin-left: 0px;   margin-top: 0px;   transform: rotate(-.8deg); }
.about-hero-tags span:nth-child(2) { font-size: .82rem; opacity: .48; margin-left: 72px;  margin-top: -6px;  transform: rotate(1.5deg); }
.about-hero-tags span:nth-child(3) { font-size: .92rem; opacity: .55; margin-left: 8px;   margin-top: -4px;  transform: rotate(.6deg); }
.about-hero-tags span:nth-child(4) { font-size: .8rem;  opacity: .52; margin-left: 56px;  margin-top: -8px;  transform: rotate(-1.4deg); }
.about-hero-tags span:nth-child(5) { font-size: 1.12rem;opacity: .72; margin-left: 4px;   margin-top: -5px;  transform: rotate(1.2deg); }
.about-hero-tags span:nth-child(6) { font-size: .88rem; opacity: .58; margin-left: 78px;  margin-top: -6px;  transform: rotate(-2deg); }

.about-hero-img {
  position: relative;
  margin-top: 1rem;
}

.about-hero-img img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  display: block;
}

.about-intro {
  max-width: var(--max-width);
  margin-bottom: var(--space-lg);
}

.about-intro p {
  font-family: var(--font-serif-cjk);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-ink);
}

.about-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.about-pillar {
  background: var(--color-thumb-bg);
  padding: var(--space-md);
  border-radius: 8px;
}

.about-pillar-title {
  font-family: var(--font-serif-cjk);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.about-pillar p {
  font-family: var(--font-serif-cjk);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink);
}

.about-close {
  max-width: var(--max-width);
  margin: var(--space-lg) 0;
}

.about-close-quote {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.about-close p {
  font-family: var(--font-serif-cjk);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-ink);
}

.about-toolbox {
  max-width: var(--max-width);
  margin: var(--space-lg) 0;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.about-toolbox-title {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.about-toolbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.about-toolbox-label {
  font-family: var(--font-sans);
  font-size: .7rem;
  color: var(--color-text-light);
  min-width: 90px;
}

.about-chip {
  font-family: var(--font-sans);
  font-size: .72rem;
  color: var(--color-ink);
  background: var(--color-thumb-bg);
  padding: 2px 10px;
  border-radius: 12px;
  opacity: .7;
}

.about-tags {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.about-tags-hint {
  font-family: var(--font-sans);
  font-size: .65rem;
  color: var(--color-text-light);
  opacity: .5;
  margin-bottom: var(--space-sm);
}

.about-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.about-tag {
  font-family: var(--font-serif-cjk);
  color: #C4A078;
  opacity: .55;
  font-size: .9rem;
}

.about-tag:nth-child(1) { font-size: 1.2rem; opacity: .7; }
.about-tag:nth-child(2) { font-size: 1rem; opacity: .5; }
.about-tag:nth-child(3) { font-size: 1.1rem; opacity: .6; }
.about-tag:nth-child(4) { font-size: .85rem; opacity: .5; }
.about-tag:nth-child(5) { font-size: 1rem; opacity: .55; }
.about-tag:nth-child(6) { font-size: 1.15rem; opacity: .65; }

@media (max-width: 760px) {
  .about-hero {
    grid-template-columns: 1fr;
  }
  .about-hero-img {
    order: -1;
    max-width: 320px;
    margin: 0 auto;
  }
  .about-pillars {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   Selected Work — Cards
   ========================================== */

.work {
  max-width: var(--max-width-wide);
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* ── Shared card ── */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: transform var(--ease-slow);
}

.card[data-modal] {
  cursor: pointer;
}

.card:hover {
  transform: translateY(-4px);
}

.card:hover .card-thumb {
  border-color: var(--color-accent);
}

/* Featured card gets extra bottom spacing */
.card--featured {
  margin-bottom: var(--space-sm);
}

/* ── Color wheel card: crossfade only, no color overrides ── */

.work-card--dark .card-visual {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.work-card--dark .card-visual img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  transition: opacity .45s ease;
}

.work-card--dark .card-visual-signature {
  opacity: 1;
}

.work-card--dark .card-visual-reveal {
  opacity: 0;
}

.work-card--dark:hover .card-visual-signature,
.work-card--dark:focus-within .card-visual-signature {
  opacity: 0;
}

.work-card--dark:hover .card-visual-reveal,
.work-card--dark:focus-within .card-visual-reveal {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .work-card--dark .card-visual img {
    transition: none;
  }
  .work-card--dark:hover .card-visual-reveal,
  .work-card--dark:focus-within .card-visual-reveal {
    opacity: 0;
  }
  .work-card--dark:hover .card-visual-signature,
  .work-card--dark:focus-within .card-visual-signature {
    opacity: 1;
  }
}

/* ── Thumbnail ── */

.card-thumb {
  aspect-ratio: 16 / 9;
  background: var(--color-thumb-bg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: border-color var(--ease-slow);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-thumb-placeholder {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-text-light);
  opacity: 0.4;
}

/* ── Card crossfade hover (signature → reveal) ── */
.card .card-visual {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.card .card-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity .45s ease;
}

.card .card-visual-signature {
  opacity: 1;
}

.card .card-visual-reveal {
  opacity: 0;
}

.card:hover .card-visual-signature,
.card:focus-within .card-visual-signature {
  opacity: 0;
}

.card:hover .card-visual-reveal,
.card:focus-within .card-visual-reveal {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .card .card-visual img {
    transition: none;
  }
  .card:hover .card-visual-reveal,
  .card:focus-within .card-visual-reveal {
    opacity: 0;
  }
  .card:hover .card-visual-signature,
  .card:focus-within .card-visual-signature {
    opacity: 1;
  }
}

/* ── Fan convention card: hover crossfade (signature → venue) ── */

.card-fan .card-visual {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.card-fan .card-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity .45s ease;
}

.card-fan .card-visual-signature {
  opacity: 1;
  filter: saturate(.92) brightness(.99);
}

.card-fan .card-visual-reveal {
  opacity: 0;
}

.card-fan:hover .card-visual-signature,
.card-fan:focus-within .card-visual-signature {
  opacity: 0;
}

.card-fan:hover .card-visual-reveal,
.card-fan:focus-within .card-visual-reveal {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .card-fan .card-visual img {
    transition: none;
  }
  .card-fan:hover .card-visual-reveal,
  .card-fan:focus-within .card-visual-reveal {
    opacity: 0;
  }
  .card-fan:hover .card-visual-signature,
  .card-fan:focus-within .card-visual-signature {
    opacity: 1;
  }
}

/* ── Card thumb caption overlay ── */
.card-thumb--captioned {
  position: relative;
}

.card-thumb--captioned::after {
  content: '';
  position: absolute;
  inset: 0;
  background: #FBF7F2;
  opacity: .08;
  mix-blend-mode: normal;
  pointer-events: none;
  border-radius: 14px;
}

.card-thumb-cap {
  position: absolute;
  bottom: 12px;
  left: 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: #2D2A26;
  opacity: .72;
  background: rgba(251,247,242,.55);
  padding: 3px 8px;
  border-radius: 3px;
  line-height: 1.3;
  z-index: 2;
}

/* ── Card body ── */

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

/* ── Tags ── */

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.3em;
}

.tag {
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.2em 0.85em;
  white-space: nowrap;
}

/* ── Title / subtitle / tagline ── */

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.08;
  margin-bottom: 0.15em;
}

.card-subtitle {
  font-family: var(--font-serif-cjk);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-top: 0;
  margin-bottom: 0.6em;
}

.card-tagline {
  font-size: var(--text-base);
  color: color-mix(in srgb, var(--color-ink) 70%, transparent);
  line-height: 1.8;
  margin-top: 0;
}

/* ── Compact card desc (placeholders) ── */

.card-desc {
  font-size: var(--text-base);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ── Card hint (clickable indicator) ── */

.card-hint {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--ease-slow), transform var(--ease-slow);
  margin-top: var(--space-xs);
}

.card:hover .card-hint {
  opacity: 1;
  transform: translateX(0);
}

/* ── Detail section (inside modal) ── */

.card-detail {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Thesis blockquote */
.card-thesis {
  margin: 0;
  padding: 0;
}

.card-thesis p {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-style: italic;
  line-height: 1.5;
  color: var(--color-text);
}

/* Case thesis (static gold line card — no animation) */

.case-thesis {
  margin: 0;
  padding: 0;
  padding-left: var(--space-lg);
  border-left: 3px solid var(--color-accent);
  background: none;
}

.case-thesis p {
  font-family: var(--font-serif-cjk);
  font-size: 1.5rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-ink);
  margin: 0;
}

/* ── Thesis with decorative diagonal quotes ── */

.thesis-quoted {
  position: relative;
  padding-top: var(--space-md);
  padding-bottom: var(--space-sm);
  /* inherits border-left + padding-left from .case-thesis */
}

.thesis-quoted p {
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  padding-left: 0.3em;
  padding-right: 2.7em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}

.thesis-quoted::before,
.thesis-quoted::after {
  font-family: var(--font-display);   /* Playfair Display */
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0;
  position: absolute;
  pointer-events: none;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.thesis-quoted::before {
  content: '\201C';                    /* " left double quotation */
  top: -0.3em;
  left: 0.5em;
}

.thesis-quoted::after {
  content: '\201D';                    /* " right double quotation */
  bottom: -0.55em;
  right: 0;
}

/* Animated: quotes appear, then text follows */
.thesis-quoted.animated::before,
.thesis-quoted.animated::after {
  opacity: 0.4;
  transform: scale(1);
}

.thesis-quoted.animated p {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion: static visible, no animation */
@media (prefers-reduced-motion: reduce) {
  .thesis-quoted::before,
  .thesis-quoted::after {
    opacity: 0.4;
    transform: scale(1);
    transition: none;
  }
  .thesis-quoted p {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Case section (scroll-triggered fade-in per block) */

.case-section {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s ease, transform .7s ease;
}

.case-section.in-view {
  opacity: 1;
  transform: none;
}

/* Optional stagger */
.case-section:nth-child(2) { transition-delay: .05s; }
.case-section:nth-child(3) { transition-delay: .12s; }
.case-section:nth-child(4) { transition-delay: .19s; }
.case-section:nth-child(5) { transition-delay: .26s; }

/* Detail list */

.detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.detail-list li {
  font-family: var(--font-serif-cjk);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.85;
  color: var(--color-ink);
  padding-left: 1.4em;
  position: relative;
  list-style: none;
}

.detail-list li::before {
  content: '';
  position: absolute;
  left: 0.15em;
  top: calc(1.85em / 2); /* 首行行高一半 = 视觉中线 */
  transform: translateY(-50%);
  width: 0.36em;
  height: 0.36em;
  border-radius: 50%;
  background: var(--color-accent);
}

/* Detail blocks */
.case-section p {
  font-family: var(--font-serif-cjk);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.85;
  color: var(--color-ink);
  margin-top: var(--space-xs);
}

.case-section p strong,
.detail-list li strong {
  font-weight: 700;
  color: var(--color-ink);
}

.card-detail-label {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  text-transform: none;
  color: #A07A4A;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
}

/* Term emphasis (no bold) */
.term {
  letter-spacing: 0.02em;
  color: #A07A4A;
}

/* Accent-highlighted quoted terms in case body */
.accent-quote {
  color: var(--color-accent);
}

.accent-quote-alt {
  color: #A07A4A;
}

/* ==========================================
   Work — Pillars
   ========================================== */

.pillar {
  margin-top: var(--space-xl);
  padding-top: 0;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.pillar:first-child {
  margin-top: 0;
}

.pillar-keyword {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.15;
}

.pillar-verb {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-text);
  margin-top: var(--space-xs);
  line-height: 1.5;
}

.pillar-def {
  font-size: var(--text-base);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

/* ==========================================
   Work Modal
   ========================================== */

.work-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ease-slow);
}

.work-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.work-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(45, 42, 38, 0.35);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.work-modal-panel {
  position: relative;
  background: var(--color-bg);
  max-width: var(--max-width-wide);
  width: calc(100% - 2 * var(--space-md));
  max-height: 88vh;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  transform: translateY(16px);
  transition: transform var(--ease-slow);
}

.work-modal.active .work-modal-panel {
  transform: translateY(0);
}

.work-modal-close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: none;
  border: none;
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1;
  color: var(--color-text-light);
  cursor: pointer;
  padding: var(--space-xs);
  transition: color var(--ease-slow);
}

.work-modal-close:hover {
  color: var(--color-text);
}

.work-modal-body {
  max-width: 42em;
  margin: 0 auto;
}

/* Prevent body scroll when modal is open */
body.modal-open {
  overflow: hidden;
}

/* ==========================================
   Approach
   ========================================== */

.approach {
  padding: 3rem var(--space-md) var(--space-xl);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* ── Intro band ── */
.approach-intro {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.approach-intro .section-heading {
  margin-bottom: 50px;
}

.approach-thesis {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.2;
  margin: 0 0 var(--space-md);
  position: relative;
  left: 0.5em;
}

.approach-lede {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-md);
  line-height: 1.85;
  color: var(--color-text);
  max-width: 36em;
  margin: 0 auto;
}

/* ── Zigzag band ── */
.approach-band {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.approach-band--flip {
  grid-template-columns: 1.2fr 1fr;
}

.approach-band--flip .approach-band-visual {
  order: -1;
}

.approach-num {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 400;
  color: var(--color-accent);
  opacity: 0.5;
  line-height: 1;
  display: block;
  margin-bottom: var(--space-xs);
}

.approach-band-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.2;
  margin: 0;
}

.approach-band-text {
  display: flex;
  flex-direction: column;
}

.approach-band-sub {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.approach-band-text p {
  font-family: var(--font-serif-cjk);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
  margin: 0;
}

/* Override: subtitle keeps its own font-size */
.approach-band-text .approach-band-sub {
  font-size: 1.25rem;
}

/* Only the body paragraph after subtitle gets spacing */
.approach-band-sub + p {
  margin-top: 20px;
}

.approach-band-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.approach-band-visual svg {
  width: 100%;
  height: auto;
  transform-origin: center center;
}

/* 02 Cross-Model: scale up to match 01/03 */
.approach-band--flip .approach-band-visual svg {
  transform: scale(1.18);
}

.state-svg {
  width: 100%;
  height: auto;
  max-width: 320px;
  margin: 0 auto;
  display: block;
}

/* ── SVG diagram tokens ── */
.ap-axis {
  stroke: #2D2A26;
  stroke-width: 1.5;
  opacity: 0.5;
}

.ap-axis-label {
  font-family: var(--font-serif-cjk);
  font-size: 17px;
  fill: #2D2A26;
  opacity: 0.5;
}

.ap-calib {
  stroke: #C4A078;
  stroke-width: 1;
  opacity: 0.5;
}

.ap-calib-label {
  font-family: var(--font-sans);
  font-size: 15px;
  fill: #C4A078;
  opacity: 0.6;
}

.ap-node-circle {
  stroke: #C4A078;
  stroke-width: 2;
  fill: none;
}

.ap-node-text {
  font-family: var(--font-sans);
  font-size: 15px;
  fill: #2D2A26;
  opacity: 0.7;
}

/* ── Case meta card ── */
.case-meta-card {
  background: var(--color-thumb-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-sm) 0 var(--space-md);
  font-family: var(--font-sans);
  font-size: .8rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.case-meta-card p {
  margin: 0;
}

/* ── Cognitive Map: figure + overlay (Path B) ── */
.cm-figure {
  position: relative;
  width: 100%;
}

.cm-svg {
  width: 100%;
  height: auto;
}

.cm-hitarea {
  fill: rgba(0,0,0,0.001);
  pointer-events: all;
  cursor: pointer;
}

.cm-node {
  stroke: #C4A078;
  stroke-width: 2;
  fill: none;
  pointer-events: none;
}

.cm-guide {
  stroke: #C4A078;
  stroke-dasharray: 4 3;
  stroke-width: 1.5;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}

.cm-point {
  cursor: pointer;
}

.cm-point:focus {
  outline: none;
}

.cm-point.is-active .cm-guide {
  opacity: .6;
}

/* Top-right overlay readout */
.cm-readout {
  position: relative;
  margin: 16px 0 0 auto;
  width: 100%;
  max-width: 400px;
  min-height: 105px;
}

.cm-cap {
  margin: 0;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.45;
  color: #2D2A26;
  background: #FBF7F2;
  border: 1px solid #C4A078;
  border-radius: 8px;
  padding: 8px 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,.1);
  box-sizing: border-box;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}

.cm-cap--hint {
  position: relative;
  opacity: 1;
  background: transparent;
  border: 0;
  color: #9b8e7d;
}

.cm-readout.has-active .cm-cap--hint {
  opacity: 0;
}

.cm-cap.is-active {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .cm-cap,
  .cm-guide {
    transition: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cm-guide,
  .cm-readout__item {
    transition: none;
  }
}

.ap-legend {
  font-family: var(--font-sans);
  font-size: 17px;
  fill: #2D2A26;
  opacity: 0.5;
}

/* ── Approach keyword emphasis ── */
.kw {
  border-bottom: 1.5px solid #C4A078;
  color: #2D2A26;
  cursor: default;
}

.about-intro .kw {
  border-bottom: none;
}

.umwelt {
  border-bottom: 1.5px dashed #C4A078;
  color: #2D2A26;
  cursor: help;
  position: relative;
}

.umwelt::after {
  content: 'umwelt（环境界）· 源自符号学：每个主体只感知、并据以行动的那层「属于自己的现实」。放到模型上，就是它从语境里读出的、区别于公共世界知识的那部分。';
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: #2D2A26;
  color: #FBF7F2;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  line-height: 1.55;
  padding: 10px 14px;
  border-radius: 4px;
  white-space: normal;
  width: 320px;
  max-width: 80vw;
  text-align: left;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s ease;
  z-index: 10;
}

.umwelt:hover::after {
  opacity: 1;
}

/* ── Closing band ── */
.approach-closing {
  text-align: center;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-lg);
}

.approach-closing-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-accent);
  margin: 0 0 var(--space-md);
}

.approach-closing p {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-md);
  line-height: 1.85;
  color: var(--color-text);
  max-width: 36em;
  margin: 0 auto;
}

/* ── Mobile ── */
@media (max-width: 760px) {
  .approach-band {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .approach-band--flip .approach-band-visual {
    order: 0;
  }
  .approach-band-visual svg {
    max-width: 100%;
  }
  .approach-thesis {
    font-size: var(--text-2xl);
  }
}

/* ==========================================
   Contact
   ========================================== */

.contact {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-inner {
  text-align: center;
}

.contact-cta {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.contact-btn {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-ink);
  text-decoration: none;
  border: 1.5px solid #C4A078;
  border-radius: 8px;
  padding: 12px 32px;
  transition: background .2s ease, color .2s ease;
}

.contact-btn:hover {
  background: #C4A078;
  color: #FBF7F2;
}

/* Work: tighten heading-to-pillar gap */
.work {
  padding-top: var(--space-md) !important;
  padding-bottom: var(--space-md) !important;
}

.work .section-heading {
  text-align: center;
  margin-bottom: 0 !important;
  padding-bottom: 0 !important;
}

.work .pillar:first-child {
  margin-top: -1rem !important;
}

/* ==========================================
   Craft
   ========================================== */

.craft {
  padding-top: 10rem !important;
  padding-right: var(--space-md);
  padding-bottom: var(--space-xl);
  padding-left: var(--space-md);
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.craft-intro {
  text-align: center;
  margin-bottom: 60px;
}

.craft-intro .section-heading {
  margin-bottom: 0;
}

/* Thesis: serif with decorative quotes */
.craft-thesis {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
  margin-top: 1.5rem;
  position: relative;
  padding: 0 0.45em 0 0.75em;
}

.craft-thesis::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.28;
  position: absolute;
  top: -0.25em;
  left: -0.1em;
  line-height: 1;
  pointer-events: none;
}

.craft-thesis::after {
  content: '\201D';
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.28;
  line-height: 1;
  vertical-align: -0.7em;
  margin-left: 0.3em;
}


.craft-group + .craft-group {
  margin-top: 4rem;
}

.craft-group-title {
  font-family: var(--font-sans);
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 1.25rem;
}

/* Photography: structured grid wall */
.photo-row {
  display: grid;
  gap: 12px;
  align-items: start;
}

.photo-row.triptychs {
  grid-template-columns: repeat(4, 1fr);
}

.photo-row.triptychs img {
  aspect-ratio: 1 / 2;
  object-fit: contain;
  background: var(--color-thumb-bg);
}

.triptych-row img {
  flex: 1;
  min-width: 0;
  height: auto;
  max-height: 100%;
  display: block;
  border-radius: var(--card-radius, 2px);
}

.photo-row.pairs {
  grid-template-columns: repeat(4, 1fr);
  margin-top: 12px;
}

.photo-row figure {
  margin: 0;
}

.photo-row img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--card-radius, 2px);
}

/* Stills: 5×5 contact-sheet, square crops */
.stills-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.stills-grid img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

@media (max-width: 760px) {
  .photo-row.pairs {
    grid-template-columns: repeat(2, 1fr);
  }
  .triptych-row {
    flex-wrap: wrap;
  }
  .triptych-row img {
    flex: 1 1 40%;
  }
  .stills-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================
   Footer
   ========================================== */

.site-footer {
  padding: var(--space-md);
  padding-bottom: var(--space-lg);
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.site-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  opacity: 0.6;
}

/* ==========================================
   Fade-in (triggered by Intersection Observer)
   ========================================== */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.fade-in.visible,
.work.fade-in {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   Mechanism Diagram (SVG animation)
   ========================================== */

.mechanism-diagram {
  margin: 1.5rem 0;
  max-width: 100%;
  overflow: visible;
}

.mechanism-svg {
  width: 100%;
  height: auto;
  display: block;
  max-width: 760px;
  margin: 0 auto;
}

/* Color wheel overlay: positioned HTML div (no foreignObject, Safari-safe) */

.cw-pos {
  position: absolute;
  left: calc(55 / 720 * 100%);
  top:  calc(71 / 340 * 100%);
  transform: translate(-50%, -50%);   /* anchor: center on node coords */
  pointer-events: none;
}

.color-wheel.cw-mechanism {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: conic-gradient(from -90deg, #C77B68, #D9B566, #E0CDAE, #9CA86E, #C77B68);
  -webkit-mask: radial-gradient(circle, transparent 54%, #000 55%);
  mask: radial-gradient(circle, transparent 54%, #000 55%);
  transform-origin: center;
  animation: beat-rotate 3.6s steps(8) infinite paused;
}

@keyframes beat-rotate {
  to { transform: rotate(360deg); }
}

/* Waveform bars: beat-synced pulse */
.wave-bar {
  transform-origin: center;
  animation: beat-pulse 0.45s steps(2) infinite paused;
}

.wave-bar:nth-child(odd) {
  animation-delay: 0.225s;
}

@keyframes beat-pulse {
  0%, 100% { transform: scaleY(0.5); }
  50%      { transform: scaleY(1); }
}

/* Hover: speed up the beat */
.mechanism-diagram:hover .color-wheel {
  animation-duration: 2.4s;
}

.mechanism-diagram:hover .wave-bar {
  animation-duration: 0.3s;
}

/* Reduced motion: static diagram */
@media (prefers-reduced-motion: reduce) {
  .color-wheel,
  .wave-bar {
    animation: none;
  }
}

/* ==========================================
   Evidence Banner (horizontal link cards)
   ========================================== */

.evidence-module {
  margin-top: var(--space-md);
  padding-top: 0;
  border-top: none;
  margin-bottom: var(--space-sm);
}

.evidence-heading {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.evidence-banner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-thumb-bg);
  border-radius: 6px;
}

.evidence-banner + .evidence-banner {
  margin-top: var(--space-sm);
}

.evidence-banner:first-child {
  border-top: 1px solid var(--color-border);
}

.evidence-banner-thumb {
  flex-shrink: 0;
  width: 100px;
  height: 62px;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.evidence-banner-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.evidence-banner-body {
  flex: 1;
  min-width: 0;
}

.evidence-banner-title {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.4;
  margin: 0;
}

.case-section p.evidence-banner-meta {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: 0.15em;
}

.evidence-banner-meta {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: 0.15em;
}

.evidence-banner-cta {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
  transition: opacity .2s ease;
}

.evidence-banner-cta:hover {
  opacity: 0.7;
}

/* Phone frame */
.evidence-phone {
  flex-shrink: 0;
}

.phone-frame {
  width: 44px;
  height: 76px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.phone-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Small color wheel ring inside phone mockup */
.color-wheel-thumb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: conic-gradient(from -90deg, #C77B68, #D9B566, #E0CDAE, #9CA86E, #C77B68);
  -webkit-mask: radial-gradient(circle, transparent 54%, #000 55%);
  mask: radial-gradient(circle, transparent 54%, #000 55%);
}

.phone-notch {
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-border);
}

.evidence-info {
  flex: 1;
  min-width: 0;
}

.evidence-title {
  font-family: var(--font-serif-cjk);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.4;
}

.evidence-meta {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: 0.15em;
}

.evidence-cta {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
  transition: color var(--ease-slow);
}

.evidence-cta:hover {
  color: var(--color-ink);
}

@media (max-width: 640px) {
  .evidence-banner {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  .evidence-banner-cta {
    width: 100%;
    text-align: right;
  }
  .case-phone-row {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }
  .case-phone-row .case-phone-mockup {
    flex: 0 1 auto;
    max-width: 160px;
  }
  .case-visual-grid {
    max-width: 100%;
  }
}

/* ── Card thumb image ── */
.card-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Case hero band (hero bg + Harvey cutout overlay + CTA) ── */
.case-hero-band {
  margin: 0 0 var(--space-lg) 0;
}

.case-hero-bg {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: var(--color-ink);
}

.case-hero-img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  display: block;
  opacity: 0.7;
  filter: saturate(0.6) brightness(0.85);
}

.case-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45,42,38,0.35) 0%, transparent 60%);
  pointer-events: none;
}

.case-hero-cutout {
  position: absolute;
  right: 6%;
  bottom: 0;
  width: 28%;
  max-width: 220px;
  z-index: 2;
}

.case-hero-cutout img {
  width: 100%;
  display: block;
  object-fit: contain;
  filter: saturate(0.85) contrast(1.05);
  mask-image: linear-gradient(to top, rgba(0,0,0,1) 75%, rgba(0,0,0,0));
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,1) 75%, rgba(0,0,0,0));
}

.case-hero-cta {
  display: inline-block;
  margin-top: var(--space-sm);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}

.case-hero-cta:hover {
  border-bottom-color: var(--color-accent);
}

.case-disclaimer {
  margin-top: var(--space-xs);
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--color-ink);
  opacity: 0.35;
  line-height: 1.5;
}

/* ── Phone mockup (发现·竖屏 recap 进手机框) ── */
.case-phone-mockup {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.case-phone-frame {
  position: relative;
  width: 160px;
  border: 3px solid var(--color-ink);
  border-radius: 18px;
  overflow: hidden;
  background: var(--color-ink);
  opacity: 0.85;
}

.case-phone-frame::before {
  content: '';
  display: block;
  padding-top: 216%;  /* 9:19.5 竖屏比例 */
}

.case-phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 14px;
  background: var(--color-ink);
  border-radius: 0 0 8px 8px;
  z-index: 2;
  opacity: 0.6;
}

.case-phone-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  box-shadow: none;  /* phone frame already has border */
}

/* 色轮卡三连帧: 缩小 + 16:9 满铺 */
#modal-3 .case-phone-row .case-phone-mockup {
  flex: 0 1 140px;
  min-width: 90px;
}
#modal-3 .case-phone-frame {
  width: 100%;
}
#modal-3 .case-phone-frame img {
  object-fit: cover;
}

/* Global: soft shadow on all case detail images */
.case-visual-grid .case-visual-img {
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
}

.case-pullquote-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* ── Case visual row (side-by-side image + diagram) ── */
.case-visual-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-sm) 0;
  align-items: stretch;
}

.case-visual-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-visual-row .case-visual-figure .case-visual-img {
  object-fit: cover;
  flex-shrink: 0;
  aspect-ratio: 7 / 5;
}

.case-visual-img {
  width: 100%;
  display: block;
  border-radius: 4px;
  background: var(--color-ink);
  opacity: 0.9;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}

.case-visual-cap {
  margin-top: 1.2em;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-ink);
  opacity: 0.4;
  text-align: center;
}

/* ── Flow diagram (SVG) ── */
.case-flow-diagram {
  margin: 0;
}

.case-flow-svg {
  width: 100%;
  display: block;
}

/* ── Phone row: 3-phone horizontal layout (发现·脊) ── */
.case-phone-row {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.case-phone-row .case-phone-mockup {
  flex: 0 1 180px;
  min-width: 120px;
}

/* ── Pull-quote (deprecated, keep minimal) ── */
.case-pullquote-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* ── Visual grid (2-col image gallery) ── */
.case-visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-md) auto;
  align-items: stretch;
  max-width: 80%;
}

.case-visual-grid .case-visual-figure {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-visual-grid .case-visual-figure .case-visual-img {
  flex: 1;
  object-fit: cover;
  min-height: 0;
}

.case-visual-grid .case-visual-img {
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}

/* ── Color wheel: method two-shot gallery ── */
.cw-method-shots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 2rem 0;
}

.cw-method-shots figure {
  margin: 0;
}

/* Landscape device mockup — matches .case-phone-frame style */
.cw-landscape-mockup {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 3px solid var(--color-ink);
  border-radius: 18px;
  overflow: hidden;
  background: var(--color-ink);
  opacity: 0.85;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
}

.cw-mockup-notch {
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-border);
  z-index: 2;
  opacity: 0.6;
}

.cw-landscape-mockup img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 0;
  box-shadow: none;
}

/* Caption for method shots — centered below grid */
.case-section p.cw-shot-cap {
  margin-top: 0.9em;
  font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', -apple-system, sans-serif;
  font-size: 0.75rem;
  color: var(--color-ink);
  opacity: 0.45;
  text-align: center;
}

@media (max-width: 640px) {
  .cw-method-shots {
    grid-template-columns: 1fr;
  }
}

/* ── Battle report placeholder ── */
.case-stat-placeholder {
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-lg) 0;
  border: 1px dashed var(--color-accent);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-ink);
  opacity: 0.45;
}

.case-stat-icon {
  font-size: 0.7rem;
}

/* ==========================================
   Responsive — Mobile (< 640px)
   ========================================== */

@media (max-width: 640px) {
  :root {
    --text-4xl: 2.75rem;
    --text-3xl: 2.25rem;
    --text-2xl: 1.75rem;
    --text-xl:  1.375rem;
    --text-lg:  1.125rem;

    --space-xl: 6rem;
    --space-lg: 3rem;
    --space-md: 1.5rem;
  }

  .site-header {
    padding: var(--space-sm) var(--space-sm);
  }

  .nav-list {
    gap: var(--space-sm);
  }

  .hero {
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
  }

  .about,
  .work,
  .approach,
  .contact {
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
  }

  .card-list {
    gap: var(--space-lg);
  }

  /* Stack visual rows on mobile */
  .case-visual-row,
  .case-visual-pullquote,
  .case-visual-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .case-hero-img {
    max-height: 240px;
  }
}

/* ==========================================
   Responsive — Tablet (640–1024px)
   ========================================== */

@media (min-width: 641px) and (max-width: 1024px) {
  :root {
    --text-4xl: 3.25rem;
    --space-xl: 7rem;
  }
}