/* ========== Project detail page ========== */
.project {
  padding-left: var(--rail-w);
}
.project__head {
  padding: 70px 60px 30px 280px;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.project__case {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 14px;
}
.project__title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.5vw, 80px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.01em;
}
.project__sub {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--text-dim);
}
.project__back {
  position: absolute;
  top: 76px;
  left: 60px;
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  transition: color .25s;
}
.project__back:hover { color: var(--accent); }

/* ========== Sidebar TOC ========== */
.toc {
  position: fixed;
  top: 50%;
  left: calc(var(--rail-w) + 24px);
  transform: translateY(-50%);
  z-index: 40;
  width: 200px;
  max-height: 80vh;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 14px 0;
  scrollbar-width: thin;
}
.toc::-webkit-scrollbar { width: 0; }
.toc__title {
  font-size: 9px;
  color: var(--text-faint);
  letter-spacing: 0.3em;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.toc ol { list-style: none; }
.toc__item {
  display: block;
  padding: 7px 12px 7px 14px;
  color: var(--text-dim);
  border-left: 1px solid var(--border);
  cursor: pointer;
  transition: color .25s, border-color .25s, padding .3s;
  position: relative;
}
.toc__item.lvl-2 { padding-left: 28px; font-size: 10px; color: var(--text-faint); }
.toc__item.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  padding-left: 18px;
}
.toc__item.lvl-2.is-active { padding-left: 32px; }
.toc__item .num { color: var(--accent); margin-right: 8px; }

/* ========== Sections (each section is full-page tall) ========== */
.project__sections {
  margin-left: 240px;
}
.psec {
  min-height: 100vh;
  padding: 80px 80px;
  position: relative;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.psec__head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 36px;
}
.psec__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
}
.psec__title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 52px);
  font-weight: 400;
  line-height: 1.05;
}
.psec__lead {
  max-width: 700px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  margin-bottom: 30px;
}

/* === Cover === */
.psec--cover {
  align-items: center;
  text-align: center;
  justify-content: center;
}
.psec--cover .psec__title {
  font-size: clamp(32px, 4.8vw, 72px);
}
.psec--cover .cover-frame {
  margin-top: 40px;
  width: min(80vw, 1100px);
  aspect-ratio: 16/9;
  position: relative;
}
.cover-frame .ph {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(255,255,255,0.08), transparent 60%),
    repeating-linear-gradient(135deg, #1c1c1c 0 8px, #131313 8px 16px);
  filter: grayscale(0.6);
}

/* === Background text === */
.psec--text { padding: 100px 80px; }
.psec--text .psec__body {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  max-width: 1200px;
}
.psec--text .meta-col {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  line-height: 2;
}
.psec--text .meta-col .lab { color: var(--accent); display: block; margin-bottom: 4px; }
.psec--text .meta-col .item { margin-bottom: 18px; }
.psec--text .text-col p {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 22px;
}
.psec--text .text-col p:first-child::first-letter {
  font-family: var(--font-serif);
  font-size: 64px;
  float: left;
  line-height: 0.9;
  margin: 6px 12px 0 0;
  color: var(--accent);
}

/* === Hero image === */
.psec--hero { padding: 0; }
.psec--hero .hero-img {
  flex: 1;
  margin: 60px 80px 60px;
  position: relative;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(230,57,70,0.05), transparent 60%),
    repeating-linear-gradient(45deg, #1a1a1a 0 8px, #0e0e0e 8px 16px);
  border: 1px solid var(--border);
}
.psec--hero .psec__head { padding: 60px 80px 0; margin-bottom: 0; }

/* === No-header variant: any psec can be headless (only image / only text) === */
.psec--noheader .psec__head { display: none; }
.psec--noheader.psec--hero .hero-img { margin: 80px; }
.psec--noheader.psec--cover { padding: 80px; }
.psec--noheader.psec--slider { padding-top: 80px; }
.psec--noheader.psec--specs { padding-top: 80px; }

/* ========== FULL (沉浸式详情) — 70% 屏幕居中（rail 是浮层不占位） ========== */
.project.p-full {
  padding: 0;                  /* 顶部不留白：第一个模块直接贴顶 */
  width: 70%;
  max-width: 1400px;
  margin: 0 auto;              /* 真正屏幕居中 */
  background: var(--project-bg, #ec7e3b);
  position: relative;
  z-index: 2;                  /* 画布在背景图（z 0）之上 */
  overflow: hidden;            /* 防止子模块横向/纵向溢出画布 */
}
/* 详情页第一个模块顶到画布顶 */
.project.p-full .project__sections > :first-child { margin-top: 0; }
.project.p-full .toc { display: none !important; }
.project.p-full .project__head { display: none; }
.project.p-full .project__sections { margin-left: 0; }
.project.p-full .psec__head { display: none; }
.project.p-full .psec__lead { display: none; }
.project.p-full .spec-title { display: none; }
.project.p-full .spec-cap { display: none; }
.project.p-full .multitall__col::before { display: none; }
.project.p-full .psec--text { display: none; }

/* 可选的小标题 + 文案（页面上方，靠近图，居左）— psec 加 .has-head 启用 */
.project.p-full .psec.has-head .psec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 0 0 6px;             /* 紧贴图片，不留大空 */
  margin: 0;
  text-align: left;
}
.project.p-full .psec.has-head .psec__head .psec__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(0, 0, 0, 0.45);
  flex: 0 0 auto;
}
.project.p-full .psec.has-head .psec__head .psec__title {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.88);
  letter-spacing: 0;
  line-height: 1.3;
  margin: 0;
}
.project.p-full .psec.has-head .psec__lead {
  display: block;
  padding: 0;
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.6;
  color: rgba(0, 0, 0, 0.55);
  max-width: 60ch;
  text-align: left;
}

/* 统一：高度按内容自适应（取消 100vh 强制）、无分隔线、透明（让 main 画布色透出） */
.project.p-full .psec {
  height: auto;
  min-height: 0;
  border: none !important;
  background: transparent;       /* 透明 → main 的画布色统一透出 */
  padding: 0;                    /* 默认无 padding，每种模块自己控制 */
  box-sizing: border-box;
  max-width: 100%;
}
.project.p-full .site-foot {
  background: transparent;
  border-top: 1px solid rgba(255,255,255,0.12);
}

/* === 大图模块（cover / hero-image）：占满整页，覆盖底色，四边无留白 === */
.project.p-full .psec--cover,
.project.p-full .psec--hero {
  padding: 0;
}
.project.p-full .psec--cover .cover-frame,
.project.p-full .psec--hero .hero-img {
  width: 100%;
  height: 100%;
  margin: 0;
  aspect-ratio: auto;
  flex: 1;
}
.project.p-full .psec--cover .cover-frame .ph {
  width: 100%;
  height: 100%;
}
/* 大图角落十字标记隐藏（避免画框感） */
.project.p-full .psec--cover .cover-frame > span,
.project.p-full .psec--hero .hero-img > span {
  display: none;
}

/* === 小图模块（slider / specs / multitall）：四周留白 40px，顶部多 60px 让出 topbar === */
.project.p-full .psec--slider,
.project.p-full .psec--specs,
.project.p-full .psec--multitall {
  padding: 100px 40px 40px 40px;  /* 上 100 (含 topbar 60) / 下 40 / 左右 40 */
  display: flex;
  flex-direction: column;
}
.project.p-full .psec--slider .slider-shell {
  flex: 1;                     /* 撑满剩余空间，去掉上下大块空白 */
  padding: 0;                  /* 父级已处理边距 */
  gap: 16px;
  align-items: stretch;
}
.project.p-full .psec--specs .specs-grid {
  flex: 1;
  gap: 16px;
}
.project.p-full .psec--multitall .multitall {
  flex: 1;
  padding: 0;
  height: auto;
  gap: 16px;
}

/* slider 内容居中（少图时不再贴左偏右；多图时正常滚动） */
.project.p-full .slider-shell {
  justify-content: center;
}
.project.p-full .slider-shell::before,
.project.p-full .slider-shell::after {
  content: '';
  flex: 0 0 0;
  margin: auto;
}

/* slide-item 高度撑满 shell，宽度按 layout 比例 */
.project.p-full .slide-item {
  height: 100%;
  width: auto;
  flex: 0 0 auto;
}
.project.p-full .slide-item.size-1x1 { aspect-ratio: 1 / 1; }
.project.p-full .slide-item.size-2x1 { aspect-ratio: 1 / 2; }   /* 2 行 1 列 → 高>宽 */
.project.p-full .slide-item.size-3x1 { aspect-ratio: 1 / 3; }
.project.p-full .slide-item.size-1x2 { aspect-ratio: 2 / 1; }   /* 1 行 2 列 → 宽>高 */
.project.p-full .slide-item.size-2x2 { aspect-ratio: 1 / 1; }

/* N×N 卡内子格 gap 8px，无内 padding（让图贴边对齐） */
.project.p-full .slide-item.size-2x1,
.project.p-full .slide-item.size-3x1,
.project.p-full .slide-item.size-1x2,
.project.p-full .slide-item.size-2x2 {
  gap: 8px;
  padding: 0;
}

/* spec-card 撑满高度，内部 canvas flex 1 占满 */
.project.p-full .spec-card {
  display: flex;
  flex-direction: column;
}
.project.p-full .spec-card .spec-canvas {
  flex: 1;
  height: auto;
}

/* === 全部图 / 卡片去除边框 === */
.project.p-full .slide-item,
.project.p-full .spec-card,
.project.p-full .multitall__col,
.project.p-full .cover-frame,
.project.p-full .psec--hero .hero-img,
.project.p-full .ph,
.project.p-full .spec-canvas {
  border: none !important;
  outline: none;
}
/* 卡片本身不再涂深色面板 — 让 .ph 占满 */
.project.p-full .slide-item,
.project.p-full .spec-card {
  background: transparent;
  padding: 0;
}
.project.p-full .slide-item__cap { display: none; }

/* 真实图片保持原有比例：放到最大、居中、不变形（卡片内多余区域为底色） */
.project.p-full .ph,
.project.p-full .spec-canvas,
.project.p-full .cover-frame .ph,
.project.p-full .psec--hero .hero-img {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  width: 100%;
  height: 100%;
}

/* multitall 自动滚动（每列不同节奏，类似老虎机） */
.project.p-full .multitall__col {
  overflow: hidden;       /* 取消用户滚动，改自动 */
}
.project.p-full .multitall__strip {
  height: 200%;           /* 内容 = 容器 2 倍，translateY -50% 无缝循环 */
  animation: stripAuto var(--strip-dur, 32s) linear infinite;
}
.project.p-full .multitall__col:nth-child(1) .multitall__strip { --strip-dur: 28s; animation-delay: 0s; }
.project.p-full .multitall__col:nth-child(2) .multitall__strip { --strip-dur: 38s; animation-delay: -7s; }
.project.p-full .multitall__col:nth-child(3) .multitall__strip { --strip-dur: 32s; animation-delay: -3s; }
.project.p-full .multitall__col:nth-child(4) .multitall__strip { --strip-dur: 44s; animation-delay: -12s; }
.project.p-full .multitall__col:nth-child(5) .multitall__strip { --strip-dur: 36s; animation-delay: -5s; }

@keyframes stripAuto {
  from { transform: translateY(0); }
  to   { transform: translateY(-50%); }
}

/* 顶部 fixed bar（详情模式） */
.p-full__topbar {
  position: fixed;
  top: 0; left: var(--rail-w); right: 0;
  height: 60px;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 30px;
  z-index: 70;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
}
.p-full__topbar .left { display: flex; align-items: center; gap: 16px; }
.p-full__topbar .case { color: var(--accent); }
.p-full__topbar .title {
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 0;
  color: var(--text);
}
.p-full__topbar .nav-mini {
  display: flex; gap: 14px;
  font-size: 10px;
  color: var(--text-dim);
}
.p-full__topbar .nav-mini .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background .3s;
  cursor: pointer;
}
.p-full__topbar .nav-mini .dot.is-active { background: var(--accent); }
.p-full__topbar .close {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 16px;
  letter-spacing: 0.22em;
  transition: all .25s;
  display: inline-flex; align-items: center; gap: 8px;
}
.p-full__topbar .close:hover { background: var(--accent); color: #fff; }

/* 详情页底部翻页提示 */
.p-full__navbar {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.p-full__navbar button {
  width: 38px; height: 38px;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  background: rgba(10,10,10,0.7);
  backdrop-filter: blur(6px);
  transition: all .25s;
}
.p-full__navbar button:hover { color: var(--accent); border-color: var(--accent); }

/* 模块右上角小编号（详情模式） */
.psec__corner-num {
  position: absolute;
  top: 24px; right: 24px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--accent);
  z-index: 5;
  opacity: 0;
  display: none;
}
.project.p-full .psec__corner-num { display: block; opacity: 0.6; }
.project.p-full .psec:hover .psec__corner-num { opacity: 1; }

/* === Slider sections (IP / Posters / Other ref) === */
.psec--slider { padding: 80px 0; }
.psec--slider .psec__head { padding: 0 80px; }
.psec--slider .slider-shell {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 0 80px 20px;
  scrollbar-width: thin;
  scroll-snap-type: x mandatory;
}
.psec--slider .slider-shell::-webkit-scrollbar { height: 4px; }
.psec--slider .slider-shell::-webkit-scrollbar-thumb { background: var(--accent); }
.slide-item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  position: relative;
  background: #161616;
  border: 1px solid var(--border);
}
.slide-item .ph {
  background:
    repeating-linear-gradient(135deg, #1f1f1f 0 6px, #141414 6px 12px);
}
.slide-item__cap {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}
/* layouts: rows × cols within a single slide group */
.slide-item.size-1x1 { width: 60vh; height: 60vh; }
.slide-item.size-2x1 { width: 60vh; height: 60vh; display: grid; grid-template-rows: 1fr 1fr; gap: 4px; padding: 4px; }
.slide-item.size-3x1 { width: 60vh; height: 60vh; display: grid; grid-template-rows: 1fr 1fr 1fr; gap: 4px; padding: 4px; }
.slide-item.size-1x2 { width: 90vh; height: 60vh; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; }
.slide-item.size-2x2 { width: 60vh; height: 60vh; display: grid; grid-template: 1fr 1fr / 1fr 1fr; gap: 4px; padding: 4px; }

/* === Design specs (multi-column poster style) === */
.psec--specs { padding: 80px; }
.specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.spec-card {
  background: var(--panel-solid);
  border: 1px solid var(--border);
  padding: 26px;
  position: relative;
}
.spec-card .spec-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 14px;
}
.spec-card .spec-canvas {
  height: 320px;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(255,255,255,0.06), transparent 60%),
    repeating-linear-gradient(45deg, #181818 0 6px, #111 6px 12px);
}
.spec-card .spec-cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

/* === Multi-column tall vertical scroll === */
.psec--multitall { padding: 0; }
.psec--multitall .psec__head { padding: 60px 80px 30px; }
.multitall {
  flex: 1;
  display: flex;
  gap: 14px;
  padding: 0 80px 60px;
  height: calc(100vh - 200px);
  align-items: stretch;
}
.multitall__col {
  flex: 1;
  overflow-y: auto;
  background: #0e0e0e;
  border: 1px solid var(--border);
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-line) transparent;
}
.multitall__col::-webkit-scrollbar { width: 3px; }
.multitall__col::-webkit-scrollbar-thumb { background: var(--accent-line); }
.multitall__col::before {
  content: attr(data-col);
  position: sticky;
  display: block;
  top: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--accent);
  background: linear-gradient(180deg, #0e0e0e 70%, transparent);
  z-index: 2;
}
.multitall__strip {
  width: 100%;
  height: 240%;
  background:
    repeating-linear-gradient(0deg, #1a1a1a 0 18px, #131313 18px 36px),
    radial-gradient(ellipse at 50% 30%, rgba(230,57,70,0.1), transparent 50%);
  background-blend-mode: overlay;
  position: relative;
}
.multitall__strip::after {
  content: '';
  position: absolute; inset: 12px;
  border: 1px dashed rgba(255,255,255,0.06);
}

@media (max-width: 1100px) {
  .toc { display: none; }
  .project__sections { margin-left: 0; }
  .project__head { padding: 60px 30px 30px; }
  .project__back { left: 30px; top: 70px; }
  .psec { padding: 60px 30px; min-height: auto; }
  .psec--text .psec__body { grid-template-columns: 1fr; gap: 24px; }
  .psec--specs { padding: 60px 30px; }
  .specs-grid { grid-template-columns: 1fr; }
  .multitall { padding: 0 20px 40px; }
}

/* ============================================================ */
/* ===== 项目页 v2：动态模板渲染（简介 + 详情 通用 sections） ===== */
/* ============================================================ */

/* ---- 简介页：一栏垂直堆叠（无动效） ---- */
.p-intro__blocks-v2 {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 900px;
  margin: 50px 0;
}
.p-intro__blocks-v2 > .psec {
  margin: 0;
  padding: 0;
  min-height: 0;
  height: auto;
  background: transparent;
  border: none;
}
.p-intro__blocks-v2 .psec--single-img img,
.p-intro__blocks-v2 .psec--gallery img {
  width: 100%;
  height: auto;
  display: block;
}
.p-intro__blocks-v2 .psec--gallery {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.p-intro__blocks-v2 .psec--text-v2 h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.005em;
  margin-bottom: 14px;
  color: var(--text);
  position: relative;
  padding-bottom: 12px;
}
.p-intro__blocks-v2 .psec--text-v2 h2::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 36px; height: 2px;
  background: var(--accent);
}
.p-intro__blocks-v2 .psec--text-v2 .text-body p {
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 16px;
  color: var(--text);
}

.p-intro__cta-wrap {
  margin: 40px 0 80px;
  text-align: center;
}

/* ---- 详情页 v2：4 种排版（70vw 画布连续；模块紧贴；支持宽度比例缩放） ---- */
.project.p-full > .project__sections {
  display: flex;
  flex-direction: column;
  gap: 0;                       /* 模块之间默认无间距，缩小后两图自然贴近 */
}

/* 通用：所有 v2 模块清掉默认 100vh，让每种模块自定 */
.project.p-full .psec--single-img,
.project.p-full .psec--strip-v2,
.project.p-full .psec--text-v2,
.project.p-full .psec--gallery {
  height: auto;
  min-height: 0;
}

/* 模块共享变量：--img-scale (0~1)、--module-gap（cell 间距，固定 16px 不再随 scale 缩） */
.project.p-full .psec--single-img.is-full,
.project.p-full .psec--strip-v2,
.project.p-full .psec--multitall-v2,
.project.p-full .psec--text-v2 {
  --img-scale: 1;
  --module-gap: 16px;
}

/* ===== 通用：模块自带 title + body（caption），黑色文字，紧贴下方图 ===== */
.project.p-full .psec__caption {
  width: 100%;
  padding: 0 40px;
  color: #000;
  margin-bottom: 8px;          /* 文字到图间距（≈30%） */
  box-sizing: border-box;
}
.project.p-full .psec__caption h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-lg);     /* 20px：再放大一档 */
  font-weight: 700;
  color: #000;
  letter-spacing: 0;
  line-height: 1.3;
  margin: 0 0 4px;
}
.project.p-full .psec__caption p {
  font-family: var(--font-sans);
  font-size: var(--fs-md);     /* 16px：放大一档 */
  line-height: 1.6;
  color: #000;
  margin: 0;
  white-space: pre-line;
}

/* 1) 大图：宽度按 scale 居中（默认 100% 全幅），高度按图比例自动，封顶 100vh；
      模块外四周无任何间距；caption 出现时只占左右内边距 */
.project.p-full .psec--single-img.is-full {
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: transparent;
  overflow: hidden;
}
.project.p-full .psec--single-img.is-full .psec__caption {
  padding: 48px 40px 8px;     /* 大图模块外 0 padding；caption 顶部留白翻倍 = 48px */
}
/* frame 收缩到 img 实际尺寸（inline-block + max-width / max-height）：
   这样阴影/圆角加在 frame 上时贴合真实图，不会出现"加在画布宽占位符上"的 bug */
.project.p-full .psec--single-img.is-full .si-frame {
  display: inline-block;
  position: relative;
  width: calc(100% * var(--img-scale, 1));
  max-width: 100%;                 /* 永不超出画布宽 */
  line-height: 0;
  vertical-align: top;
}
.project.p-full .psec--single-img.is-full .si-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  max-height: none;        /* 取消高度限制：保留原图比例 */
}
/* 取消详情页图片高度封顶，保留原始比例（strip / multitall / dual / imgtext） */
.project.p-full .strip-cell img,
.project.p-full .multitall-v2 img,
.project.p-full .psec--dual .dual-col img,
.project.p-full .psec--imgtext .imgtext__img img {
  max-height: none;
  object-fit: contain;
}

/* ===== 装饰开关：has-decorate 给模块内所有图加 5px 圆角 + 黑色投影 ===== */
/* 注意：si-frame 之前同时给 frame 和 img 加 border-radius，frame 是 block 而 img 是 absolute 100%
   会导致大图右下角出现一块"未铺满"的米白底色块（用户反馈）。
   修正：只给 img 加圆角和投影；frame 容器透明、不加圆角不加 overflow:hidden */
.project.p-full .has-decorate .si-frame {
  background: transparent;
  border-radius: 0;
  overflow: visible;
}
/* ===== has-decorate：圆角 + 真正的投影（box-shadow 跟随 border-radius） =====
   关键：drop-shadow 在 jpg（不透明 alpha）上不跟随 border-radius，会在圆角外溢出形成"灰色 halo"
   改用 box-shadow + 容器收缩到图大小 + overflow:hidden 让圆角真正生效 */
.project.p-full .has-decorate .si-frame,
.project.p-full .has-decorate .dual-col,
.project.p-full .has-decorate .imgtext__img .img-frame,
.p-intro__main .has-decorate .img-frame {
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 8px 8px 20px 0 rgba(0, 0, 0, 0.25);
}
/* img 自身加圆角（即使父级 overflow hidden 失效时仍然有圆角；container-img 同时圆角） */
.project.p-full .has-decorate .si-frame img,
.project.p-full .has-decorate .dual-col img,
.project.p-full .has-decorate .imgtext__img img,
.p-intro__main .has-decorate .img-frame img {
  border-radius: 15px;
}
/* strip 每张图独立加圆角+阴影（wrap 不再收缩到图大小，shadow 直接走 img） */
.project.p-full .has-decorate .strip-cell__wrap img {
  border-radius: 15px;
  box-shadow: 8px 8px 20px 0 rgba(0, 0, 0, 0.25);
}
/* multitall：图本身加 box-shadow + 圆角（每张图独立，列容器不撑满图大小） */
.project.p-full .has-decorate .multitall-v2__strip img {
  border-radius: 15px;
  box-shadow: 8px 8px 20px 0 rgba(0, 0, 0, 0.25);
  margin-bottom: 8px;
}

/* ===== caption 横排：详情页 image / strip / multitall 通用 ===== */
.project.p-full .psec.has-cap-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 4vw, 60px);
  align-items: flex-start;        /* 文字与图片顶部对齐（不垂直居中） */
  padding: 60px 40px;
}
.project.p-full .psec.has-cap-side .psec__caption-side {
  display: flex;
  align-items: flex-start;
  min-width: 0;
}
.project.p-full .psec.has-cap-side .psec__caption {
  margin: 0;
  padding: 0;
}
.project.p-full .psec.has-cap-side .si-frame,
.project.p-full .psec.has-cap-side .strip-pages,
.project.p-full .psec.has-cap-side .multitall-v2 {
  width: 100%;
}
/* caption 在下方 */
.project.p-full .psec.has-cap-bottom .psec__caption {
  padding-top: 16px;
  padding-bottom: 0;
}
@media (max-width: 720px) {
  .project.p-full .psec.has-cap-side {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 40px 18px;
  }
  .project.p-full .psec.has-cap-right .psec__caption-side { order: -1; }
}

/* imgtext 图文左右排版（详情页用） */
.project.p-full .psec--imgtext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 60px);
  align-items: center;
  padding: 60px 40px;
}
.project.p-full .psec--imgtext .imgtext__img { line-height: 0; }
.project.p-full .psec--imgtext .imgtext__img img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
}
.project.p-full .psec--imgtext .imgtext__copy h3 {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  color: var(--bg);
  margin-bottom: 12px;
}
.project.p-full .psec--imgtext .imgtext__copy .text-body p {
  font-size: 15px;
  line-height: 1.8;
  color: #222;
  margin-bottom: 10px;
}
@media (max-width: 720px) {
  .project.p-full .psec--imgtext { grid-template-columns: 1fr; padding: 40px 18px; }
}

/* 2) 多图横滑 strip — N×N 网格分页，多余横滑下一页；高度由 JS 按图比例自动算
      宽度比例（width_pct）应用到「cell 内图片」，cell 占位符（grid 1fr）保持不变 */
.project.p-full .psec--strip-v2 {
  /* 上下 padding 按 scale 缩；上方留白增加一倍（=60×scale），下方保持 30×scale */
  padding: calc(60px * var(--img-scale, 1)) 40px calc(30px * var(--img-scale, 1));
  overflow: visible;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  box-sizing: border-box;
}
/* 多图横滑：rows 行等高（1fr），列宽按图实际比例（height × ratio），
   gap 一致，整体横向溢出可滑；不再分 page，scroll-snap 也取消 */
.project.p-full .strip-pages {
  width: 100%;
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(var(--rows, 1), minmax(0, 1fr));
  grid-auto-columns: max-content;
  gap: var(--module-gap);
  overflow-x: auto;
  overflow-y: hidden;
  height: var(--strip-page-h, 60vh);
  max-height: calc(100vh - 60px);
  /* scrollbar 与底图间距 14px（避免压在图上） */
  box-sizing: content-box;
  padding-bottom: 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-line) transparent;
}
.project.p-full .strip-pages::-webkit-scrollbar { height: 6px; }
.project.p-full .strip-pages::-webkit-scrollbar-track { background: transparent; }
.project.p-full .strip-pages::-webkit-scrollbar-thumb {
  background: var(--accent-line);
  border-radius: 3px;
}
.project.p-full .strip-pages::-webkit-scrollbar-thumb:hover { background: var(--accent); }
/* cell：占满分配到的行高，宽度由内部图按比例撑开 */
.project.p-full .strip-cell {
  background: transparent;
  display: flex;
  align-items: stretch;
  justify-content: center;
  min-width: 0;
}
.project.p-full .strip-cell__wrap {
  display: block;
  height: 100%;
  line-height: 0;
}
.project.p-full .strip-cell__wrap img {
  display: block;
  height: 100%;
  width: auto;
  max-width: none;
  max-height: 100%;
  object-fit: contain;
}

/* 简介页 strip 也支持 N×N（不过简介页通常用 gallery，这里兜底） */
.p-intro__blocks-v2 .strip-pages {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}
.p-intro__blocks-v2 .strip-page {
  flex: 0 0 100%;
  scroll-snap-align: start;
  display: grid;
  grid-template-rows: repeat(var(--rows, 1), 1fr);
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  gap: 12px;
  aspect-ratio: 16/9;
}

/* 3) 多列竖滚 — 容器 100vh（带蒙层），列宽等分，列内图片按列宽 100% 显示，
      高度按原比例自适应，gap 跟图实际尺寸走 */
.project.p-full .psec--multitall-v2 {
  height: 100vh;
  max-height: 100vh;
  padding: 60px 40px 30px;
  box-sizing: border-box;
  overflow: hidden;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.project.p-full .multitall-v2 {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(var(--cols-n, 1), 1fr);
  gap: var(--module-gap);
  flex: 1;                       /* 填满 caption 之后剩下的高度 */
  min-height: 0;
}
.project.p-full .multitall-v2__col {
  overflow: hidden;
  position: relative;
  min-width: 0;                  /* grid 列收紧避免 1fr 被图撑爆 */
  /* 两端渐隐蒙版（顶/底） */
  -webkit-mask-image: linear-gradient(180deg,
    transparent 0%, #000 8%, #000 92%, transparent 100%);
  mask-image: linear-gradient(180deg,
    transparent 0%, #000 8%, #000 92%, transparent 100%);
}
.project.p-full .multitall-v2__strip {
  display: flex;
  flex-direction: column;
  gap: var(--module-gap);
  will-change: transform;
  align-items: stretch;
}
.project.p-full .multitall-v2__strip img,
.project.p-full .multitall-v2__strip video {
  display: block;
  width: 100%;                  /* 列宽 100%，不再被 img-scale 缩 */
  height: auto;                 /* 按原图比例自适应 */
  flex-shrink: 0;
  border-radius: 10px;
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.18),
    0 2px 6px rgba(0, 0, 0, 0.10);
  overflow: hidden;
}
@keyframes multitallScrollV2 {
  from { transform: translateY(0); }
  to   { transform: translateY(-50%); }
}

/* 4) 文字模块 */
.project.p-full .psec--text-v2 {
  padding: 60px 40px;
  text-align: left;
  height: auto;
  min-height: 0;
  background: transparent;
}
.project.p-full .psec--text-v2 h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 400;
  letter-spacing: -0.005em;
  margin-bottom: 24px;
  color: var(--text);
}
.project.p-full .psec--text-v2 .text-body p {
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 18px;
  max-width: 65ch;
  color: var(--text);
}

/* （旧版简介页 v2 双栏样式已迁至 project-intro.css） */

/* 项目页：禁用全站 body 暗角 / 扫描线，让画布纯色 */
body[data-page="project-detail"]::before,
body[data-page="project-detail"]::after,
body[data-page="project-intro"]::before,
body[data-page="project-intro"]::after {
  display: none !important;
}

/* ===== 详情页滚动渐显（IntersectionObserver） + 内部元素 stagger ===== */
/* 整体模块：fade + translate + scale + blur */
.project__sections .reveal {
  opacity: 0;
  transform: translateY(48px) scale(0.98);
  filter: blur(6px);
  transition: opacity .95s cubic-bezier(.2,.8,.25,1),
              transform .95s cubic-bezier(.2,.8,.25,1),
              filter .95s cubic-bezier(.2,.8,.25,1);
}
.project__sections .reveal.is-in {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

/* caption 文字独立 stagger：h3 -> p 依次浮现 */
.project.p-full .psec__caption h3,
.project.p-full .psec__caption p {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s cubic-bezier(.2,.8,.25,1),
              transform .7s cubic-bezier(.2,.8,.25,1);
}
.project.p-full .psec.is-in .psec__caption h3 {
  opacity: 1; transform: translateY(0);
  transition-delay: .15s;
}
.project.p-full .psec.is-in .psec__caption p {
  opacity: 1; transform: translateY(0);
  transition-delay: .26s;
}

/* 大图：clip-path 从上向下揭开（mask reveal） */
.project.p-full .psec--single-img.is-full .si-frame {
  clip-path: inset(0 0 100% 0);
  transition: clip-path 1.1s cubic-bezier(.2,.8,.25,1);
}
.project.p-full .psec--single-img.is-full.is-in .si-frame {
  clip-path: inset(0 0 0 0);
  transition-delay: .15s;
}

/* strip：cell 左→右依次出现（fade+up+scale） */
.project.p-full .psec--strip-v2 .strip-cell {
  opacity: 0;
  transform: translateY(36px) scale(0.95);
  transition: opacity .7s cubic-bezier(.2,.8,.25,1),
              transform .7s cubic-bezier(.2,.8,.25,1);
  transition-delay: calc(var(--si, 0) * 0.1s + 0.15s);
}
.project.p-full .psec--strip-v2.is-in .strip-cell {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* multitall：列从下方依次"揭开"——列容器 clip-path inset 让内部图卡片一张张出现 */
.project.p-full .psec--multitall-v2 .multitall-v2__col {
  opacity: 0;
  transform: translateY(60px) scale(0.96);
  clip-path: inset(100% 0 0 0);            /* 列默认从底部完全遮住 */
  transition: opacity .9s cubic-bezier(.2,.8,.25,1),
              transform .9s cubic-bezier(.2,.8,.25,1),
              clip-path 1.2s cubic-bezier(.2,.8,.25,1);
  transition-delay: calc(var(--si, 0) * 0.22s + 0.1s);
}
.project.p-full .psec--multitall-v2.is-in .multitall-v2__col {
  opacity: 1;
  transform: translateY(0) scale(1);
  clip-path: inset(0 0 0 0);                /* 揭开 → 图卡一张张露出 */
}
/* 视口外暂停滚动动画（性能优化） */
.project.p-full .psec--multitall-v2:not(.is-in) .multitall-v2__strip {
  animation-play-state: paused !important;
}
/* 浏览器跳过非视口部分的渲染 */
.project.p-full .psec--multitall-v2,
.project.p-full .psec--strip-v2 {
  content-visibility: auto;
  contain-intrinsic-size: 70vh;
}

/* gallery（详情页若有，简介页 gallery 不加；这里用 detail 限定） */
.project.p-full .psec--gallery .img-frame {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s, transform .55s;
  transition-delay: calc(var(--si, 0) * 0.08s);
}
.project.p-full .psec--gallery.is-in .img-frame {
  opacity: 1;
  transform: translateY(0);
}

/* 详情页打开过渡（整体淡入） */
@keyframes pFullEnter {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
body[data-page="project-detail"] .project.p-full {
  animation: pFullEnter .5s cubic-bezier(.2,.8,.25,1) both;
}
/* close 是 fixed + translateX(-50%) 居中，不能用 pFullEnter（会覆盖 transform 导致水平偏移） */
@keyframes pFullCloseEnter {
  from { opacity: 0; }
  to   { opacity: 1; }
}
body[data-page="project-detail"] .p-intro__close {
  animation: pFullCloseEnter .5s .15s cubic-bezier(.2,.8,.25,1) both;
}

/* ===== 详情页 dual 双图+文字 ===== */
.project.p-full .psec--dual {
  width: 70vw;
  margin: 0 auto;
  padding: 100px 0;
}
.project.p-full .psec--dual .dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  gap: clamp(20px, 4vw, 60px);
}
.project.p-full .psec--dual .dual-col img {
  width: 100%;
  height: auto;
  display: block;
}
.project.p-full .psec--dual .dual-col--center {
  text-align: center;
  padding: 0 4%;
}
.project.p-full .psec--dual .dual-col--center h3 {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 32px);
  font-weight: 500;
  line-height: 1.25;
  color: var(--bg);
  letter-spacing: -0.005em;
  margin-bottom: 14px;
}
.project.p-full .psec--dual .dual-col--center .dual-body p {
  font-size: 13px;
  line-height: 1.8;
  color: #333;
  margin-bottom: 8px;
}

/* dual 入场：图片在画布内小距离滑动（不超出画布） + 中间文字渐显 */
.project.p-full .psec--dual {
  overflow: hidden;             /* 限制子图 transform 不溢出画布外（黑色底色区域） */
}
.project.p-full .psec--dual .dual-col--left,
.project.p-full .psec--dual .dual-col--right,
.project.p-full .psec--dual .dual-col--center {
  opacity: 0;
  transition: opacity .9s cubic-bezier(.2,.8,.25,1),
              transform .9s cubic-bezier(.2,.8,.25,1);
}
.project.p-full .psec--dual .dual-col--left  { transform: translateX(-50px); }
.project.p-full .psec--dual .dual-col--right { transform: translateX(50px); }
.project.p-full .psec--dual .dual-col--center { transform: translateY(20px); }
.project.p-full .psec--dual.is-in .dual-col--left {
  opacity: 1; transform: translateX(0); transition-delay: .15s;
}
.project.p-full .psec--dual.is-in .dual-col--right {
  opacity: 1; transform: translateX(0); transition-delay: .15s;
}
.project.p-full .psec--dual.is-in .dual-col--center {
  opacity: 1; transform: translateY(0); transition-delay: .35s;
}
/* dual 外层模块不参与通用 reveal，让子动画自由发挥 */
.project__sections .psec--dual.reveal {
  opacity: 1; transform: none; filter: none;
}

@media (max-width: 900px) {
  .project.p-full .psec--dual { width: 88vw; padding: 60px 0; }
  .project.p-full .psec--dual .dual-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .project.p-full .psec--dual .dual-col--left,
  .project.p-full .psec--dual .dual-col--right { transform: translateY(40px); }
}

/* ===== 详情页 mobile：全宽画布 + 模块去 100vh 限制 ===== */
@media (max-width: 720px) {
  .p-intro { padding: 40px 18px 60px; }

  /* mobile 画布占满整屏宽度（rail 是浮层不占位）；顶部 0 留白让首图贴顶 */
  .project.p-full {
    width: 100%;
    max-width: none;
    margin: 0;
    padding-top: 0;
  }

  /* 所有 v2 模块：去掉 100vh 限制，按内容自适应；横向 padding 收紧 */
  .project.p-full .psec {
    height: auto;
    min-height: 0;
  }
  .project.p-full .psec--single-img.is-full .psec__caption { padding: 32px 18px 6px; }
  .project.p-full .psec__caption { padding: 0 18px; }
  .project.p-full .psec__caption h3 { font-size: 16px; }
  .project.p-full .psec__caption p { font-size: 14px; line-height: 1.6; }

  /* 大图：mobile 不限 100vh，按图自身比例 */
  .project.p-full .psec--single-img.is-full .si-frame {
    max-height: none;
  }

  /* strip 多图横滑：保留分页滑动，padding 收紧 */
  .project.p-full .psec--strip-v2 {
    padding: calc(40px * var(--img-scale, 1)) 14px calc(20px * var(--img-scale, 1));
  }
  .project.p-full .strip-pages { max-height: none; }

  /* multitall：mobile 改成 70vh（垂直滚动列高度） */
  .project.p-full .psec--multitall-v2 {
    height: 70vh;
    max-height: 70vh;
    padding: calc(40px * var(--img-scale, 1)) 14px calc(20px * var(--img-scale, 1));
  }

  /* text 模块 */
  .project.p-full .psec--text-v2 { padding: 60px 18px 30px; }
  .project.p-full .psec--text-v2 h2 { font-size: clamp(22px, 6vw, 30px); }

  /* dual 单列已处理；mobile 再缩 padding */
  .project.p-full .psec--dual { width: 90vw; padding: 40px 0; }

  /* 详情页底部联系页 / 返回按钮等左边距适配 */
  .project__back { left: 16px !important; top: 56px !important; }
}
@media (max-width: 420px) {
  .project.p-full .psec--single-img.is-full .psec__caption { padding: 24px 14px 4px; }
}

/* ============================================================
   可交互演示区块（demo block）
   iframe 原型 / ElevenLabs 语音 / WeKnora 知识库问答
   ============================================================ */
.psec--demo { padding: 6vh 0; }
.psec--demo h2 { margin: 0 0 .6rem; }
.psec--demo .demo-note {
  margin: 0 0 1.6rem; max-width: 62ch;
  font-size: .92rem; line-height: 1.75; opacity: .62;
}
.demo-stage {
  position: relative;
  width: 100%;
  height: var(--demo-h, 640px);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 4px;
  background: rgba(255,255,255,.03);
  overflow: hidden;
}
.demo-frame { width: 100%; height: 100%; border: 0; display: block; background: #fff; }
/* 手机框只露机身，iframe 的白底必须透明，否则机身四周会有一圈白 */
.demo-phone .demo-frame { background: transparent; }
/* 桌面布局的原型在窄容器里等比缩小（缩放系数由 render.js 按容器宽度算） */
.demo-scaler { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.demo-notice--narrow {
  display: flex; flex-direction: column; align-items: flex-start; gap: 1.1rem;
  justify-content: center; height: 100%; opacity: 1; padding: 1.8rem 1.5rem;
}
.demo-notice--narrow { font-size: .88rem; line-height: 1.75; opacity: .72; }
.demo-open--inline { position: static; align-self: flex-start; }

/* ============================================================
   演示外壳：电脑显示器框 / 手机框 + 分屏导航 + 放大弹窗
   ============================================================ */
.demo-stage--framed {
  height: auto; border: 0; background: none; overflow: visible;
  display: flex; flex-direction: column; align-items: center; gap: 1rem;
}
.demo-stage__bar { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: center; }
.demo-stage__bar .demo-open { position: static; }

/* ---- 电脑：屏幕 + 转轴 + 底座 ---- */
.demo-monitor { width: 100%; display: flex; flex-direction: column; align-items: center; }
.demo-monitor__bezel {
  position: relative; width: 100%;
  background: linear-gradient(var(--bg-2), var(--bg));
  border: 1px solid var(--border-strong);
  border-radius: 14px 14px 6px 6px;
  padding: 22px 10px 12px; overflow: hidden;
  box-shadow: 0 30px 70px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.09);
}
.demo-monitor__cam {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-faint); box-shadow: inset 0 0 0 1px rgba(0,0,0,.6);
}
.demo-monitor__bar {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 12px; background: var(--bg-2);
  border-radius: 6px 6px 0 0; border: 1px solid rgba(255,255,255,.08); border-bottom: 0;
}
.demo-monitor__bar .d { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.demo-monitor__bar .d.r { background: #ff5f57; }
.demo-monitor__bar .d.y { background: #febc2e; }
.demo-monitor__bar .d.g { background: #28c840; }
.demo-monitor__url {
  margin-left: 10px; padding: 3px 12px; border-radius: 4px;
  background: rgba(0,0,0,.4); color: var(--text-dim);
  font-size: .68rem; letter-spacing: .04em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
/* 屏幕本体：固定 16:10，高度由比例决定，不跟着容器高度乱变 */
.demo-monitor__screen {
  position: relative; width: 100%; aspect-ratio: 16 / 10;
  background: #fff; overflow: hidden;
  border: 1px solid rgba(255,255,255,.08); border-top: 0;
  border-radius: 0 0 4px 4px;
}
/* 转轴 + 底座：做出一台真机的收口 */
.demo-monitor__hinge {
  width: 26%; max-width: 200px; height: 10px;
  background: var(--panel-solid);
  border: 1px solid rgba(255,255,255,.1); border-top: 0;
  border-radius: 0 0 4px 4px;
}
.demo-monitor__base {
  position: relative; width: 46%; max-width: 340px; height: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: 0 0 10px 10px;
  box-shadow: 0 12px 26px rgba(0,0,0,.5);
}
.demo-monitor__notch {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 64px; height: 5px; border-radius: 0 0 6px 6px;
  background: rgba(0,0,0,.45);
}

/* ---- 手机：不加任何承托，直接露原型自带的机身，四周不留白边 ---- */
.demo-phone { width: 100%; max-width: 620px; margin: 0 auto; }
.demo-phone__screen {
  position: relative; width: 100%; height: var(--demo-h, 720px);
  overflow: hidden; background: transparent;
}

/* ---- 分屏导航：竖排在设备左侧（原型自带的侧栏已隐藏，这是替代品）---- */
.demo-shell {
  display: flex; align-items: stretch; gap: 1.6rem;
  width: 100%; justify-content: center;
}
.demo-shell__main { order: 1; flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; }
.demo-modal--phone .demo-shell__main,
.demo-stage--phone .demo-shell__main { flex: 0 1 620px; }

/* 目录 + 放大按钮一列，排在设备右边 */
.demo-side {
  flex: 0 0 auto; order: 2;
  display: flex; flex-direction: column; align-items: stretch; gap: .9rem;
  align-self: center; width: 172px;
}
.demo-side .demo-zoom { position: static; width: 100%; text-align: center; }
.demo-nav {
  display: flex; flex-direction: column; gap: 1px;
  max-height: 60vh; overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,.13); padding-right: .1rem;
}
.demo-nav:empty { display: none; }
.demo-nav__chip {
  display: flex; align-items: center; gap: .55rem; width: 100%;
  padding: .5rem .7rem; font: inherit; font-size: .72rem; text-align: left;
  color: var(--text-dim); background: none; border: 0;
  border-right: 2px solid transparent; cursor: pointer; line-height: 1.3;
}
.demo-nav__chip:hover { background: rgba(255,255,255,.06); color: var(--text); }
.demo-nav__chip.is-on {
  color: var(--text); background: var(--accent-soft);
  border-right-color: var(--accent); font-weight: 600;
}
.demo-nav__n {
  flex: none; min-width: 1.5em; font-size: .62rem; letter-spacing: .04em;
  opacity: .5; font-variant-numeric: tabular-nums;
}
.demo-nav__chip.is-on .demo-nav__n { opacity: .85; }
.demo-nav__t { flex: 1 1 auto; }

/* ---- 放大弹窗 ---- */
.demo-modal { position: fixed; inset: 0; z-index: 9000; display: flex;
  align-items: center; justify-content: center; padding: 2vh 3vw; }
.demo-modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.9);
  backdrop-filter: blur(3px); }
.demo-modal__box { position: relative; z-index: 1; width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: .85rem; }
.demo-modal--desktop .demo-modal__box { max-width: 1320px; }
.demo-modal--phone   .demo-modal__box { max-width: 900px; }
.demo-modal__stage { position: relative; width: 100%; }
.demo-modal .demo-shell { align-items: center; }
.demo-modal--desktop .demo-modal__box { max-width: min(1320px, 126vh); }
.demo-modal--phone   .demo-modal__stage .demo-phone__screen   { height: min(86vh, 1000px); }
.demo-modal__bar { display: flex; gap: .6rem; justify-content: center; }
.demo-modal__bar .demo-open { position: static; }

@media (max-width: 760px) {
  .demo-modal { padding: 2vh 2vw; }
  .demo-modal--phone   .demo-modal__stage .demo-phone__screen   { height: 70vh; }
  .demo-shell { flex-direction: column; gap: .9rem; }
  .demo-side { width: 100%; order: 2; }
  .demo-nav { width: 100%; flex-direction: row; flex-wrap: wrap; justify-content: center;
    border-right: 0; padding-right: 0; max-height: 6rem; }
  .demo-nav__chip { width: auto; border-right: 0; border-radius: 999px;
    border: 1px solid var(--border); padding: .3rem .6rem; }
  .demo-nav__chip.is-on { border-color: var(--accent); background: var(--accent); color: var(--text); }
  .demo-nav__chip.is-on .demo-nav__n { opacity: .6; }
}
.demo-open {
  position: absolute; right: 10px; bottom: 10px; z-index: 2;
  padding: 7px 13px; font-size: .7rem; letter-spacing: .08em;
  background: rgba(0,0,0,.7); color: var(--text); text-decoration: none;
  border: 1px solid rgba(255,255,255,.22); border-radius: 3px;
  backdrop-filter: blur(6px);
}
.demo-open:hover { background: var(--accent); }
.demo-notice {
  padding: 2.2rem 2rem; font-size: .9rem; line-height: 1.8;
  opacity: .55; max-width: 60ch;
}

/* 语音 */
/* ============================================================
   语音 Agent 自研界面（黑底 + 彩带波形 + 大字转录 + 三枚圆键）
   ============================================================ */
.demo-stage.is-voice {
  height: auto; min-height: 0; padding: 0;
  display: block; overflow: visible; background: transparent; border: 0;
}
.va {
  display: flex; flex-direction: column; align-items: center;
  gap: 1.7rem; padding: 3.4rem 1.6rem 3rem;
  background: var(--bg); border-radius: 14px;
  border: 0;                       /* 去掉外框，直接嵌进页面 */
}
/* 跨出 256px 侧栏 + 44px 间距，和 BI 演示一致 */
/* 向左出血。原来写死 -300px：1024px 视口下面板左边只剩 79px，
   减 300 就把内容切掉 221px（body 的 overflow-x:hidden 藏了它，没有滚动条，
   只是看不见）。改成按左侧实际剩余空间出血，最多 300px，任何视口都切不到。 */
.proj-panel .demo-stage.is-voice {
  --bleed: min(300px, max(0px, calc((100vw - 100%) / 2 - 16px)));
  width: calc(100% + var(--bleed));
  margin-left: calc(var(--bleed) * -1);
}
@media (max-width: 900px) {
  .proj-panel .demo-stage.is-voice { --bleed: 0px; width: 100%; margin-left: 0; }
}
.va__status {
  font-size: .95rem; letter-spacing: .08em;
  color: var(--text-dim); text-align: center; min-height: 1.2em;
}
.va__wave { width: 100%; max-width: 900px; height: 210px; display: block; }

/* 转录：尾部渐暗，像实时字幕正说到这里 */
.va__script {
  width: 100%; max-width: 880px; min-height: 4.2em;
  font-size: clamp(1.3rem, 2.6vw, 2.1rem); line-height: 1.4;
  letter-spacing: -.01em; text-align: left;
}
.va__lead { color: var(--text); }
.va__tail { color: var(--text-dim); }
.va__hint { font-size: .86rem; line-height: 1.7; color: rgba(255,255,255,.34); letter-spacing: 0; }

/* 打字输入 */
.va__type { display: flex; gap: .5rem; width: 100%; max-width: 620px; }
.va__type[hidden] { display: none; }
.va__type input {
  flex: 1 1 auto; min-width: 0; padding: .6rem .9rem; font: inherit; font-size: .9rem;
  color: var(--text); background: rgba(255,255,255,.05); border: 1px solid var(--border-strong);
  border-radius: 999px; outline: none;
}
.va__type input:focus { border-color: var(--text-dim); }
.va__type button {
  flex: none; padding: .6rem 1.1rem; font: inherit; font-size: .82rem;
  color: var(--bg); background: var(--text); border: 0; border-radius: 999px; cursor: pointer;
}

/* 三枚圆键 */
.va__ctrl { display: flex; align-items: center; gap: 1.1rem; }
.va__btn {
  width: 58px; height: 58px; flex: none; padding: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); background: rgba(255,255,255,.06);
  border: 0; border-radius: 50%;
  transition: background .18s, color .18s, transform .18s;
}
.va__btn svg { width: 23px; height: 23px; }
.va__btn:hover { background: rgba(255,255,255,.16); color: var(--text); }
.va__btn:active { transform: scale(.94); }
.va__btn--main {
  width: 78px; height: 78px; color: var(--bg); background: var(--text);
}
.va__btn--main svg { width: 30px; height: 30px; }
.va__btn--main:hover { background: var(--text); color: var(--bg); }
.va__btn--main.is-live { box-shadow: 0 0 0 0 var(--text-dim); animation: va-pulse 2s infinite; }
.va__btn--main.is-muted { background: rgba(255,255,255,.18); color: var(--text); animation: none; box-shadow: none; }
@keyframes va-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(255,255,255,.35); }
  70%  { box-shadow: 0 0 0 18px rgba(255,255,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}
@media (prefers-reduced-motion: reduce) {
  .va__btn--main.is-live { animation: none; }
}
@media (max-width: 640px) {
  .va { padding: 1.8rem 1rem 1.6rem; gap: 1.1rem; }
  .va__wave { height: 108px; }
  .va__btn { width: 46px; height: 46px; }
  .va__btn--main { width: 60px; height: 60px; }
}

/* 问答 */
.demo-stage.is-chat { display: flex; flex-direction: column; }
.wk-log { flex: 1; min-height: 0; overflow-y: auto; padding: 1.6rem 1.7rem; }
.wk-empty { opacity: .38; font-size: .78rem; letter-spacing: .1em; text-align: center; padding: 3rem 1rem; }
.wk-msg { margin-bottom: 1.4rem; }
.wk-who { font-size: .64rem; letter-spacing: .14em; opacity: .45; margin-bottom: .45rem; }
.wk-body {
  font-size: .95rem; line-height: 1.85; white-space: pre-wrap;
  padding: .85rem 1.05rem; border-radius: 4px;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.09);
}
.wk-msg--me .wk-body { background: rgba(255,255,255,.02); }
.wk-src { display: flex; flex-wrap: wrap; gap: 6px; margin-top: .65rem; }
.wk-src button {
  font: inherit; font-size: .72rem; cursor: pointer;
  padding: 5px 10px; border-radius: 3px;
  background: transparent; color: inherit;
  border: 1px solid rgba(255,255,255,.22); opacity: .8;
}
.wk-src button:hover { opacity: 1; border-color: var(--text-dim); }
.wk-src button.is-open { background: var(--border-strong); opacity: 1; }
.wk-chunk {
  margin-top: .65rem; padding: .85rem 1.05rem; border-radius: 4px;
  font-size: .85rem; line-height: 1.8; white-space: pre-wrap;
  background: rgba(255,255,255,.03); border: 1px dashed rgba(255,255,255,.25);
}
.wk-chunk__meta { font-size: .64rem; letter-spacing: .1em; opacity: .5; margin-bottom: .5rem; }
.wk-input {
  display: flex; gap: 8px; padding: .9rem;
  border-top: 1px solid var(--border-strong); background: rgba(0,0,0,.18);
}
.wk-input input {
  flex: 1; min-width: 0; font: inherit; font-size: .92rem;
  padding: .65rem .85rem; border-radius: 3px; color: inherit;
  background: rgba(255,255,255,.06); border: 1px solid var(--border-strong);
}
.wk-input input:focus { outline: none; border-color: var(--text-dim); }
.wk-input button {
  font: inherit; font-size: .78rem; letter-spacing: .08em; cursor: pointer;
  padding: .65rem 1.3rem; border-radius: 3px; color: inherit;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
}
.wk-input button:hover { background: rgba(255,255,255,.18); }

@media (max-width: 760px) {
  .demo-stage { height: min(var(--demo-h, 640px), 74vh); }
  .wk-log { padding: 1.1rem 1rem; }
}


/* ============================================================
   Logo 墙（logos 区块）
   logo 必须完整显示，所以用 contain + 留白，不能像照片那样裁切
   ============================================================ */
.psec--logos .logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.1rem;
  margin-top: 1.6rem;
}
.logo-cell { margin: 0; }
.logo-cell__box {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 16 / 10; padding: 1.4rem;
  background: var(--text);          /* logo 多为深色，给浅底才看得清 */
  border: 0;
  border-radius: 14px;
  overflow: hidden;
}
.logo-cell__box img {
  max-width: 100%; max-height: 100%;
  width: auto; height: auto;
  object-fit: contain; display: block;
}
.logo-cell__name {
  margin-top: .6rem; font-size: .82rem; line-height: 1.4;
}
.logo-cell__note {
  margin-top: .2rem; font-size: .72rem; line-height: 1.5;
  color: var(--text-dim);
}
@media (max-width: 640px) {
  .psec--logos .logo-grid { grid-template-columns: repeat(auto-fill, minmax(124px, 1fr)); gap: .7rem; }
  .logo-cell__box { padding: 1rem; }
}


/* ---- 整页长截图：显示器框内部滚动 ---- */
.psec--longshot .demo-monitor__screen.longshot__screen {
  aspect-ratio: auto;                    /* 长图不按 16:10，用固定高度 + 内部滚动 */
  height: var(--shot-h, 620px);
}
.longshot__scroll {
  width: 100%; height: 100%;
  overflow-y: auto; overflow-x: hidden;
  background: #fff;
  scrollbar-width: thin;
}
.longshot__scroll img { display: block; width: 100%; height: auto; }
.longshot__scroll::-webkit-scrollbar { width: 8px; }
.longshot__scroll::-webkit-scrollbar-thumb { background: rgba(0,0,0,.25); border-radius: 4px; }


/* ---- 整张放大的图片（image 区块 full:true）：无角框 + 圆角 ---- */
.psec--img-full .img-plain { display: block; width: 100%; }
.psec--img-full .img-plain img {
  display: block; width: 100%; height: auto;
  max-height: none;                       /* 覆盖简介页的 max-height:80vh，不然截图会被压 */
  border-radius: 14px;
  border: 0;
}


/* ============================================================
   流程图（flow 区块）：带编号的链路，箭头用伪元素画
   ============================================================ */
.psec--flow .flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(178px, 1fr));
  gap: 0; margin: 1.6rem 0 0; padding: 0; list-style: none;
  counter-reset: flow;
}
.flow__step {
  position: relative;
  display: flex; flex-direction: column; gap: .4rem;
  padding: 1.1rem 1.5rem 1.2rem 1.1rem;
  border: 1px solid var(--border);
  border-right: 0;
  background: rgba(255,255,255,.02);
}
.flow__step:last-child { border-right: 1px solid var(--border); }
/* 箭头：右边缘一个小三角 */
.flow__step:not(:last-child)::after {
  content: ''; position: absolute; right: -7px; top: 50%;
  width: 12px; height: 12px; transform: translateY(-50%) rotate(45deg);
  border-top: 1px solid var(--border);
  border-right: 1px solid var(--border);
  background: var(--bg);
  z-index: 1;
}
.flow__n {
  font-family: var(--font-mono);
  font-size: .6rem; letter-spacing: .12em;
  color: var(--text-dim);
}
.flow__label { font-size: .92rem; line-height: 1.35; font-weight: 600; }
.flow__note {
  font-size: .72rem; line-height: 1.6;
  color: var(--text-dim);
}
/* 卡口：流程在这里会被拦下，用强调色标出来 */
.flow__step.is-gate {
  border-color: var(--accent);
  background: rgba(226,55,47,.07);
}
.flow__step.is-gate .flow__n,
.flow__step.is-gate .flow__label { color: var(--accent); }
.flow__step.is-gate::after { border-color: var(--accent); }

@media (max-width: 700px) {
  .psec--flow .flow { grid-template-columns: 1fr; }
  .flow__step { border-right: 1px solid var(--border); border-bottom: 0; }
  .flow__step:last-child { border-bottom: 1px solid var(--border); }
  .flow__step:not(:last-child)::after {
    right: auto; left: 50%; top: auto; bottom: -7px;
    transform: translateX(-50%) rotate(135deg);
  }
}


/* ============================================================
   指标卡 / 决策记录 / 前后对比 / 角色卡
   ============================================================ */
.metric-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 1px; margin-top: 1.5rem;
  background: var(--border);
  border: 1px solid var(--border);
}
.metric { padding: 1.3rem 1.2rem; background: var(--bg); }
.metric__from {
  font-size: .68rem; color: var(--text-dim);
  text-decoration: line-through; margin-bottom: .25rem;
}
.metric__val { font-size: 2rem; line-height: 1.05; letter-spacing: -.02em; }
.metric__unit { font-size: .82rem; margin-left: .18rem; opacity: .55; letter-spacing: 0; }
.metric__label {
  margin-top: .5rem; font-size: .74rem; line-height: 1.5;
  color: var(--text-dim);
}



.decision-list { display: flex; flex-direction: column; gap: 1px; margin-top: 1.5rem;
  background: var(--border);
  border: 1px solid var(--border); }
.decision { padding: 1.2rem 1.3rem; background: var(--bg); }
.decision__q { font-size: .88rem; line-height: 1.5; margin-bottom: .8rem; opacity: .8; }
.decision__pair { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.decision__opt {
  display: flex; flex-direction: column; gap: .3rem;
  padding: .7rem .85rem; font-size: .84rem; line-height: 1.45;
  border: 1px solid var(--border);
}
.decision__opt.is-chosen { border-color: var(--accent-line); background: var(--accent-soft); }
.decision__opt.is-dropped { opacity: .5; text-decoration-color: transparent; }
.decision__opt.is-dropped > span:last-child { text-decoration: line-through; }
.decision__tag {
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .12em;
  color: var(--text-dim);
}
.decision__opt.is-chosen .decision__tag { color: var(--accent); }
.decision__why {
  margin-top: .85rem; max-width: 46em;
  font-size: .8rem; line-height: 1.8;
  color: var(--text-dim); text-wrap: pretty;
}
.decision__because {
  display: inline-block; margin-right: .5rem;
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .12em;
  color: var(--accent);
}

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 1.5rem;
  background: var(--border);
  border: 1px solid var(--border); }
.compare__col { padding: 1.2rem 1.3rem; background: var(--bg); }
.compare__head {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .14em;
  color: var(--text-dim); margin-bottom: .9rem;
}
.compare__col.is-after .compare__head { color: var(--accent); }
.compare__col ul { margin: 0; padding: 0; list-style: none; }
.compare__col li {
  position: relative; padding-left: 1rem; margin-bottom: .6rem;
  font-size: .82rem; line-height: 1.65;
}
.compare__col li::before {
  content: '—'; position: absolute; left: 0;
  color: var(--text-dim);
}
.compare__col.is-after li::before { content: '+'; color: var(--accent); }

.persona-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px; margin-top: 1.5rem;
  background: var(--border);
  border: 1px solid var(--border); }
.persona { padding: 1.2rem 1.2rem 1.3rem; background: var(--bg); }
.persona__who { font-size: .92rem; font-weight: 600; margin-bottom: .5rem; }
.persona__wants { font-size: .8rem; line-height: 1.78; color: var(--text-dim); text-wrap: balance; }
.persona__tension {
  margin-top: .7rem; padding-top: .7rem; font-size: .76rem; line-height: 1.6;
  border-top: 1px dashed var(--border, var(--border-strong));
  color: var(--accent);
}

@media (max-width: 640px) {
  .decision__pair, .compare { grid-template-columns: 1fr; }
  .metric__val { font-size: 1.7rem; }
}


/* ============================================================
   金句卡 / 问题-洞察-动作 / 硬约束
   ============================================================ */
.psec--callout { padding: 1.6rem 0; }
.callout {
  margin: 0; padding: 1.5rem 0 1.5rem 1.6rem;
  border-left: 2px solid var(--accent);
}
.callout p {
  margin: 0; max-width: 30em;
  font-size: clamp(1.05rem, 1.8vw, 1.42rem);
  line-height: 1.68; letter-spacing: -.01em;
  text-wrap: balance;
}
.callout footer {
  margin-top: .8rem; font-size: .74rem; line-height: 1.6;
  color: var(--text-dim);
}

.tk { margin-top: 1.5rem; border-top: 1px solid var(--border); }
.tk__head, .tk__row {
  display: grid;
  grid-template-columns: 2.2rem 1fr 1fr 1.15fr;
  gap: 1.4rem;
  align-items: start;
}
/* 表头：只出现一次 */
.tk__head {
  padding: .7rem 0;
  border-bottom: 1px solid var(--border-strong);
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .14em;
  color: var(--text-faint);
}
.tk__head .is-action { color: var(--accent); }
/* 行：靠行号和横线分组，不再重复标签 */
.tk__row { padding: 1rem 0; border-bottom: 1px solid var(--border); }
.tk__n {
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em;
  color: var(--text-faint); padding-top: .18rem;
}
.tk__c { font-size: .84rem; line-height: 1.78; color: var(--text-dim); text-wrap: balance; }
.tk__c.is-action {
  padding-left: .9rem; border-left: 2px solid var(--accent);
  color: var(--text); font-weight: 500;
}

.constraint-list { margin: 1.4rem 0 0; padding: 0; list-style: none;
  border-top: 1px solid var(--border); }
.constraint {
  display: grid; grid-template-columns: 148px 1fr; gap: 1.2rem;
  padding: .9rem 0; border-bottom: 1px solid var(--border);
}
.constraint__k {
  font-size: .78rem; line-height: 1.6; font-weight: 600;
}
.constraint__v {
  max-width: 42em;
  font-size: .8rem; line-height: 1.8; color: var(--text-dim);
  text-wrap: pretty;
}

@media (max-width: 700px) {
  .tk__head { display: none; }
  .tk__row { grid-template-columns: 2rem 1fr; gap: .5rem 1rem; padding: .9rem 0; }
  .tk__n { grid-row: span 3; }
  .constraint { grid-template-columns: 1fr; gap: .3rem; }
}


/* ---- 三层目标 ---- */
.goal-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  gap: 1px; margin-top: 1.5rem;
  background: var(--border); border: 1px solid var(--border); }
.goal { padding: 1.2rem 1.25rem 1.35rem; background: var(--bg); }
.goal__k { display: block; margin-bottom: .6rem;
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .14em; color: var(--accent); }
.goal__v { margin: 0; font-size: .86rem; line-height: 1.8; text-wrap: balance; }

/* ---- 复盘反思 ---- */
.retro { margin: 1.4rem 0 0; padding: 0; list-style: none; }
.retro__row {
  display: grid; grid-template-columns: 2.2rem 1fr; gap: 1rem;
  padding: .95rem 0; border-bottom: 1px solid var(--border);
}
.retro__row:first-child { border-top: 1px solid var(--border); }
.retro__n { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em;
  color: var(--text-faint); padding-top: .3rem; }
.retro__row p {
  margin: 0; max-width: 40em;
  font-size: .84rem; line-height: 1.8; color: var(--text-dim);
  text-wrap: pretty;
}


/* ===== 窄屏：小程序原型整宽内嵌 =====
   分屏目录固定 172px 宽，在 390px 的屏上会把原型挤到放不下，
   于是走了「需要更宽的屏幕」的兜底，点开是桌面版的原始页面。
   手机上把目录和「放大查看」收起来，整个宽度让给原型本身。 */
@media (max-width: 720px) {
  .demo-shell { flex-direction: column; gap: 0.9rem; }
  .demo-shell__main { width: 100%; order: 1; }
  .demo-side { width: 100%; order: 2; align-self: stretch; }
  .demo-stage--phone .demo-phone { max-width: none; }

  /* 目录竖排要占 172px 宽，手机上放不下；但原型有七个界面全靠它切换，
     不能藏。改成横向排列、自动换行放在机身下面：七个条目全在视野里，
     比横向滚动好 —— 后者会把后面几屏藏起来，手机上没人知道能滑。 */
  .demo-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
    max-height: none;
    overflow: visible;
    border-right: 0;
    padding: 0;
  }
  .demo-nav__chip {
    flex: 0 0 auto;
    width: auto;
    min-height: 40px;
    padding: .45rem .7rem;
    border: 1px solid rgba(255, 255, 255, .16);
    border-right-width: 1px;
    white-space: nowrap;
  }
  .demo-nav__chip.is-on {
    border-color: var(--accent);
    border-right-color: var(--accent);
  }
  .demo-side .demo-zoom { display: none; }   /* 已经是整宽了，没有可放大的余地 */
}