:root {
  --ink: #1f1630;
  --orange: #ff3d00;
  --orange-hot: #ff6a1a;
  --purple: #6b2fff;
  --purple-deep: #4a18c9;
  --paper: #f4efe8;
  --paper-2: #ebe3d8;
  --white: #ffffff;
  --glass: rgba(255, 255, 255, 0.78);
  --shadow: 0 18px 40px rgba(40, 18, 70, 0.18);
  --font-display: "Bebas Neue", "Noto Sans SC", sans-serif;
  --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-cn);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  padding-top: 56px;
}

/* ---- Top sticky menu (full-width tiles) ---- */
.top-nav {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  min-height: 56px;
  padding: 0;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(74, 24, 201, 0.96), rgba(255, 61, 0, 0.92));
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 10px 28px rgba(40, 16, 70, 0.22);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.top-nav-menus {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
  align-items: stretch;
}

.top-nav-item {
  position: relative;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.top-nav-item:last-child {
  border-right: 0;
}

.top-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 56px;
  padding: 12px 10px;
  color: #fff;
  font-size: clamp(15px, 2.4vw, 18px);
  font-weight: 800;
  letter-spacing: 0.08em;
  border: 0;
  border-radius: 0;
  background: transparent;
  transition: background 180ms ease;
}

.top-nav-btn:hover,
.top-nav-item.is-open > .top-nav-btn,
.top-nav-btn.is-active {
  background: rgba(255, 255, 255, 0.16);
}

.top-nav-btn .caret {
  font-size: 10px;
  opacity: 0.85;
  transition: transform 180ms ease;
}

.top-nav-item.is-open .caret {
  transform: rotate(180deg);
}

.top-nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  min-width: 100%;
  padding: 8px;
  border-radius: 0 0 14px 14px;
  background: rgba(28, 16, 52, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-top: 0;
  box-shadow: 0 16px 36px rgba(20, 10, 40, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: 160ms ease;
}

.top-nav-item.is-open .top-nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.top-nav-dropdown a {
  display: block;
  padding: 10px 12px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 10px;
  transition: background 160ms ease;
}

.top-nav-dropdown a:hover {
  background: rgba(255, 61, 0, 0.28);
}

.top-nav-dropdown a em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.55);
}

img {
  display: block;
  max-width: 100%;
  user-select: none;
  -webkit-user-drag: none;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Halftone texture ---- */
.halftone {
  position: relative;
}

.halftone::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.22;
  mix-blend-mode: multiply;
  background-image: radial-gradient(circle, rgba(31, 22, 48, 0.55) 0.9px, transparent 1.2px);
  background-size: 7px 7px;
}

.halftone-light::before {
  opacity: 0.12;
  mix-blend-mode: soft-light;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.85) 0.8px, transparent 1.15px);
  background-size: 6px 6px;
}

/* ---- Side / bottom dot nav ---- */
.side-nav {
  position: fixed;
  z-index: 80;
  left: max(10px, env(safe-area-inset-left));
  top: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 8px;
  transform: translateY(-50%);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 18px;
  background: rgba(38, 24, 68, 0.42);
  box-shadow: 0 12px 32px rgba(29, 24, 45, 0.14);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
}

.side-nav-tip {
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  padding: 7px 11px;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border-radius: 10px;
  background: rgba(28, 16, 52, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 20px rgba(20, 10, 40, 0.25);
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

.side-nav-tip.is-show {
  opacity: 1;
}

.side-nav-tip.is-pulse {
  animation: tip-pulse 700ms ease;
}

@keyframes tip-pulse {
  0% {
    transform: translateY(-50%) scale(0.92);
  }
  40% {
    transform: translateY(-50%) scale(1.06);
  }
  100% {
    transform: translateY(-50%) scale(1);
  }
}

.side-nav button {
  position: relative;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
}

.nav-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.66);
  transition: 280ms ease;
}

.side-nav button.is-active .nav-dot {
  width: 11px;
  height: 11px;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255, 61, 0, 0.28);
}

.nav-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Cover ---- */
.cover {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: #fff;
  background: #3a1a8f;
}

.cover-collage {
  position: absolute;
  inset: 0;
}

.cover-collage img {
  position: absolute;
  object-fit: cover;
  border: 3px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 20px 50px rgba(20, 8, 40, 0.45);
}

.cover-collage .c1 {
  inset: -4% 28% 38% -8%;
  transform: rotate(-4deg);
}

.cover-collage .c2 {
  inset: 8% -10% 22% 42%;
  transform: rotate(5deg);
}

.cover-collage .c3 {
  inset: 52% 35% -8% -6%;
  transform: rotate(2deg);
}

.cover-collage .c4 {
  inset: 48% -8% -6% 48%;
  transform: rotate(-3deg);
}

.cover-wash {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(115deg, rgba(75, 24, 180, 0.72) 0%, rgba(255, 61, 0, 0.42) 55%, rgba(30, 12, 60, 0.55) 100%),
    radial-gradient(circle at 70% 20%, rgba(255, 106, 26, 0.35), transparent 40%);
}

.cover-content {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100svh;
  padding: max(20px, env(safe-area-inset-top)) max(22px, 5vw) max(36px, env(safe-area-inset-bottom));
  max-width: 720px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.brand-logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: clamp(56px, 14vw, 92px);
  line-height: 0.85;
  letter-spacing: 0.04em;
  text-shadow: 0 8px 30px rgba(20, 8, 40, 0.35);
}

.cover h1 {
  margin: 0;
  font-size: clamp(34px, 8.5vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: 0.02em;
}

.cover-lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 3.8vw, 18px);
  font-weight: 600;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}

.cover-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  width: fit-content;
  padding: 14px 22px;
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), #ff7a33);
  box-shadow: 0 14px 32px rgba(255, 61, 0, 0.35);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.cover-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(255, 61, 0, 0.42);
}

.cover-cta span {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.08em;
}

/* ---- Shared section chrome ---- */
.section {
  position: relative;
  padding: clamp(48px, 8vw, 88px) clamp(18px, 5vw, 48px);
  scroll-margin-top: 0;
}

.section-inner {
  position: relative;
  z-index: 2;
  width: min(1100px, 100%);
  margin: 0 auto;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  padding: 6px 12px;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  border-radius: 999px;
  background: var(--purple);
}

.section-kicker.is-orange {
  background: var(--orange);
}

.section-title {
  margin: 0;
  font-size: clamp(30px, 6vw, 48px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 0.01em;
}

.section-desc {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 2.8vw, 17px);
  font-weight: 500;
  line-height: 1.75;
  color: rgba(31, 22, 48, 0.82);
}

.big-num {
  font-family: var(--font-display);
  font-size: clamp(96px, 22vw, 180px);
  line-height: 0.8;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(107, 47, 255, 0.35);
  text-shadow: 8px 10px 0 rgba(255, 61, 0, 0.12);
}

.big-num.is-solid {
  color: var(--orange);
  -webkit-text-stroke: 0;
  text-shadow: 6px 8px 0 rgba(107, 47, 255, 0.18);
}

/* ---- Intro split ---- */
.intro {
  background:
    linear-gradient(180deg, #efe7dc 0%, var(--paper) 100%);
}

.intro-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px 24px;
  align-items: end;
  margin-bottom: 36px;
}

.path-entry {
  margin-top: 40px;
}

.path-entry .path-grid {
  margin-top: 16px;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.path-cta {
  display: inline-flex;
  margin-top: 16px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), #ff7a33);
  box-shadow: 0 8px 18px rgba(255, 61, 0, 0.28);
}

.path-card.is-market .path-cta {
  background: linear-gradient(90deg, var(--purple), #8b5cff);
  box-shadow: 0 8px 18px rgba(107, 47, 255, 0.28);
}

.mini-collage.is-fill {
  gap: 8px;
  margin-top: 14px;
}

.mini-collage.is-fill img {
  width: 100%;
  height: 120px;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: center;
  border-radius: 12px;
  background: #111;
}

.intro-subhead {
  margin-top: 36px;
}

.intro-subhead h3 {
  margin: 8px 0 0;
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 900;
}

.intro-subhead p {
  margin: 8px 0 0;
  max-width: 42em;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.65;
  color: rgba(31, 22, 48, 0.75);
}

.checks-in-intro {
  margin-top: 28px;
  padding: 22px;
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(255, 61, 0, 0.08), rgba(107, 47, 255, 0.06)),
    var(--white);
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 5px 5px 0 rgba(255, 61, 0, 0.1);
}

.checks-in-intro .intro-subhead {
  margin-top: 0;
}

.checks-in-intro .check-grid {
  margin-top: 16px;
}

.path-card {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  padding: 22px;
  color: #fff;
  text-decoration: none;
  border-radius: 22px;
  box-shadow: var(--shadow);
  transform: translateY(0);
  transition: transform 240ms ease;
}

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

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

.path-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(40, 16, 70, 0.15), rgba(25, 10, 50, 0.78));
}

.path-card.is-night::after {
  background: linear-gradient(160deg, rgba(107, 47, 255, 0.25), rgba(20, 8, 45, 0.82));
}

.path-card.is-market::after {
  background: linear-gradient(160deg, rgba(255, 61, 0, 0.28), rgba(50, 16, 30, 0.8));
}

.path-card > *:not(img) {
  position: relative;
  z-index: 1;
}

.path-card .path-num {
  font-family: var(--font-display);
  font-size: 64px;
  line-height: 1;
}

.path-card h3 {
  margin: 8px 0 0;
  font-size: 28px;
  font-weight: 900;
}

.path-card p {
  margin: 10px 0 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

.observe-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.observe-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 120px;
  padding: 20px 18px;
  background: var(--white);
  border-radius: 18px;
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 4px 4px 0 rgba(107, 47, 255, 0.12);
}

.observe-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, 56px);
  color: var(--orange);
  line-height: 0.9;
}

.observe-item span {
  display: block;
  margin-top: 10px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.35;
}

/* ---- TOC ---- */
.toc-section {
  background:
    radial-gradient(circle at 90% 10%, rgba(255, 61, 0, 0.1), transparent 40%),
    linear-gradient(180deg, #ebe3d8, var(--paper));
}

.toc-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.toc-list > li {
  background: var(--white);
  border-radius: 18px;
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 5px 5px 0 rgba(107, 47, 255, 0.1);
  overflow: hidden;
}

.toc-list > li > a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  transition: background 160ms ease;
}

.toc-list > li > a:hover {
  background: rgba(107, 47, 255, 0.06);
}

.toc-num {
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
  color: var(--orange);
}

.toc-body strong {
  display: block;
  font-size: 18px;
  font-weight: 900;
}

.toc-body em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 13px;
  font-weight: 600;
  color: rgba(31, 22, 48, 0.65);
}

.toc-list ul {
  margin: 0;
  padding: 0 18px 14px 74px;
  list-style: none;
}

.toc-list ul a {
  display: block;
  padding: 7px 0;
  color: var(--purple-deep);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  border-top: 1px dashed rgba(31, 22, 48, 0.1);
}

.toc-list ul a:hover {
  color: var(--orange);
}

/* ---- Typical cases band ---- */
.cases-band {
  margin: 8px 0 36px;
  padding: 22px;
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(107, 47, 255, 0.1), rgba(255, 61, 0, 0.08)),
    var(--white);
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: var(--shadow);
}

.cases-band-head h3 {
  margin: 8px 0 0;
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
}

.cases-band-head p:last-child {
  margin: 10px 0 0;
  max-width: 46em;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.65;
  color: rgba(31, 22, 48, 0.75);
}

.case-mosaic {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.case-tile {
  position: relative;
  display: grid;
  grid-template-rows: 160px auto;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  border-radius: 18px;
  background: var(--paper);
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 4px 4px 0 rgba(255, 61, 0, 0.12);
  transition: transform 200ms ease;
}

.case-tile:hover {
  transform: translateY(-3px);
}

.case-tile:nth-child(even) {
  box-shadow: 4px 4px 0 rgba(107, 47, 255, 0.14);
}

.case-tile img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.case-tile-body {
  padding: 14px 14px 16px;
}

.case-tile-no {
  display: inline-block;
  margin-bottom: 6px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #fff;
  border-radius: 999px;
  background: var(--purple);
}

.case-tile:nth-child(even) .case-tile-no {
  background: var(--orange);
}

.case-tile h4 {
  margin: 0;
  font-size: 20px;
  font-weight: 900;
}

.case-tile-rep {
  margin: 6px 0 0;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
  color: rgba(31, 22, 48, 0.7);
}

.case-tile-tip {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--purple-deep);
}

/* ---- Module badges ---- */
.module-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  background: rgba(107, 47, 255, 0.12);
  border: 1px solid rgba(107, 47, 255, 0.2);
}

.module-badge.is-orange {
  background: rgba(255, 61, 0, 0.12);
  border-color: rgba(255, 61, 0, 0.22);
}

.module-badge-idx {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1;
  color: #fff;
  border-radius: 50%;
  background: var(--purple);
}

.module-badge.is-orange .module-badge-idx {
  background: var(--orange);
}

.module-badge-meta {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: rgba(31, 22, 48, 0.75);
}

.module-lead {
  margin: -4px 0 16px;
  font-size: 14px;
  font-weight: 650;
  line-height: 1.6;
  color: rgba(31, 22, 48, 0.78);
}

/* ---- Shot blocks ---- */
.shot-block {
  position: relative;
  margin-top: 42px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(107, 47, 255, 0.08), rgba(255, 61, 0, 0.06)),
    var(--paper-2);
  border-radius: 28px;
  border: 1px solid rgba(31, 22, 48, 0.06);
  border-left: 6px solid var(--purple);
}

.shot-block.is-orange {
  background:
    linear-gradient(135deg, rgba(255, 61, 0, 0.1), rgba(107, 47, 255, 0.05)),
    #f7e8dc;
  border-left-color: var(--orange);
}

.shot-block::before {
  content: attr(data-module);
  position: absolute;
  right: 18px;
  top: 18px;
  font-family: var(--font-display);
  font-size: clamp(64px, 12vw, 96px);
  line-height: 0.8;
  color: rgba(107, 47, 255, 0.08);
  pointer-events: none;
}

.shot-block.is-orange::before {
  color: rgba(255, 61, 0, 0.1);
}

.shot-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.shot-head h3 {
  margin: 0;
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
}

.shot-tag {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
  border-radius: 999px;
  background: var(--purple);
}

.shot-tag.is-orange {
  background: var(--orange);
}

.photo-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.photo-card {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background: #ddd;
  box-shadow: 6px 8px 0 rgba(31, 22, 48, 0.12);
  transform: rotate(-0.6deg);
}

.photo-card:nth-child(even) {
  transform: rotate(0.8deg);
}

.photo-card .photo-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.photo-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.photo-card .label {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 3;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 800;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
}

/* Yellow callout annotations from PPT */
.anno {
  position: absolute;
  z-index: 2;
  transform: translate(-50%, -50%);
  max-width: 46%;
  padding: 5px 9px;
  color: #3a2200;
  font-size: clamp(10px, 1.8vw, 12px);
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
  white-space: nowrap;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffe566, #ffd000);
  border: 1.5px solid rgba(180, 110, 0, 0.45);
  box-shadow:
    0 2px 0 rgba(120, 70, 0, 0.25),
    0 6px 14px rgba(40, 20, 0, 0.18);
  pointer-events: none;
}

.anno.is-wrap {
  white-space: normal;
  text-align: left;
}

.anno.is-sm {
  padding: 3px 7px;
  font-size: clamp(9px, 1.5vw, 11px);
}

.collage-3 {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 12px;
}

.collage-3 .tall {
  grid-row: span 2;
}

.collage-3 .photo-card img {
  aspect-ratio: auto;
  height: 100%;
  min-height: 160px;
}

.info-box {
  margin-top: 16px;
  padding: 18px 18px 16px;
  background: var(--white);
  border-radius: 18px;
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 5px 5px 0 rgba(255, 61, 0, 0.14);
}

.info-box.is-purple {
  box-shadow: 5px 5px 0 rgba(107, 47, 255, 0.16);
}

.info-box h4 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--purple);
}

.info-box.is-orange h4 {
  color: var(--orange);
}

.info-box ul {
  margin: 0;
  padding: 0 0 0 1.1em;
}

.info-box li {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 550;
  line-height: 1.55;
}

.info-box li:last-child {
  margin-bottom: 0;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  padding: 7px 11px;
  font-size: 12px;
  font-weight: 800;
  border-radius: 999px;
  background: rgba(107, 47, 255, 0.1);
  color: var(--purple-deep);
}

.chip.is-orange {
  background: rgba(255, 61, 0, 0.12);
  color: #c22e00;
}

.time-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: linear-gradient(90deg, rgba(255, 61, 0, 0.12), rgba(107, 47, 255, 0.1));
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.time-banner b {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--orange);
  line-height: 1;
}

/* ---- Consume / form grids ---- */
.triple-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.triple-card {
  padding: 16px;
  background: var(--white);
  border-radius: 18px;
  box-shadow: 4px 4px 0 rgba(31, 22, 48, 0.1);
}

.triple-card .num {
  font-family: var(--font-display);
  font-size: 42px;
  color: var(--orange);
  line-height: 1;
}

.triple-card h4 {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 900;
}

.triple-card p {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.55;
  color: rgba(31, 22, 48, 0.78);
}

.mini-collage {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-top: 12px;
}

.mini-collage img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 10px;
}

.mini-tagged {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
}

.mini-tagged img {
  display: block;
}

.collage-3 .photo-frame,
.collage-3 .photo-card img {
  height: 100%;
  min-height: 160px;
}

.collage-3 .photo-card img {
  aspect-ratio: auto;
  object-fit: cover;
}

.section [id] {
  scroll-margin-top: 72px;
}

.module-badge-idx.is-part {
  width: auto;
  min-width: 52px;
  padding: 0 8px;
  font-size: 17px;
  border-radius: 999px;
}

/* ---- Prominent field tasks ---- */
.task-brief {
  position: relative;
  overflow: hidden;
  margin: -8px 0 34px;
  padding: 22px;
  color: #fff;
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 255, 255, 0.2), transparent 34%),
    linear-gradient(135deg, var(--purple-deep), var(--purple));
  box-shadow: 8px 10px 0 rgba(255, 61, 0, 0.18);
}

.task-brief.is-orange {
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 255, 255, 0.22), transparent 34%),
    linear-gradient(135deg, #d93400, var(--orange));
  box-shadow: 8px 10px 0 rgba(107, 47, 255, 0.18);
}

.task-brief-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.task-brief-mark {
  display: grid;
  place-items: center;
  flex: 0 0 74px;
  min-height: 74px;
  padding: 8px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1;
  letter-spacing: 0.08em;
  text-align: center;
  border-radius: 50%;
  background: #ffe100;
  transform: rotate(-5deg);
  box-shadow: 4px 5px 0 rgba(31, 22, 48, 0.28);
}

.task-brief .section-kicker {
  color: rgba(255, 255, 255, 0.72);
}

.task-brief h3 {
  margin: 4px 0 0;
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
  line-height: 1.2;
}

.task-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.task-metric {
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
}

.task-metric strong,
.task-metric span {
  display: block;
}

.task-metric strong {
  color: #ffe100;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.12;
}

.task-metric span {
  margin-top: 9px;
  font-size: clamp(16px, 1.7vw, 18px);
  font-weight: 800;
  line-height: 1.5;
}

.task-brief-note {
  margin: 16px 0 0;
  padding-top: 14px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.55;
  border-top: 1px dashed rgba(255, 255, 255, 0.38);
}

.shared-form-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 22, 48, 0.08);
}

.shared-form-copy h4 {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 900;
}

.shared-form-copy p {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.55;
}

.shared-layout-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 18px;
  align-items: center;
  margin-top: 16px;
  padding: 18px;
  border: 2px solid rgba(255, 61, 0, 0.26);
  border-radius: 18px;
  background: #fff9e7;
  box-shadow: 5px 6px 0 rgba(107, 47, 255, 0.1);
}

.shared-layout-copy h4 {
  margin: 12px 0 0;
  font-size: 22px;
  font-weight: 900;
}

.shared-layout-copy ul {
  margin: 10px 0 0;
  padding-left: 20px;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.58;
}

.shared-layout-copy li + li {
  margin-top: 6px;
}

.shared-layout-photo {
  position: relative;
  overflow: hidden;
  margin: 0;
  border-radius: 14px;
  background: #ddd;
}

.shared-layout-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.shared-layout-photo figcaption {
  position: absolute;
  right: 8px;
  bottom: 8px;
  left: 8px;
  padding: 7px 9px;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  line-height: 1.35;
  border-radius: 8px;
  background: rgba(31, 22, 48, 0.78);
}

.mini-tagged-wide {
  grid-column: 1 / -1;
}

.mini-tagged-wide img {
  aspect-ratio: 4 / 3;
}

/* ---- Wet-market consumption ---- */
.market-consume-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.market-consume-card {
  min-width: 0;
  padding: 16px;
  border-radius: 18px;
  background: var(--white);
  box-shadow: 4px 4px 0 rgba(31, 22, 48, 0.1);
}

.market-consume-card .num {
  color: var(--orange);
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
}

.market-consume-card h4 {
  margin: 6px 0 0;
  font-size: 19px;
  font-weight: 900;
}

.market-consume-card > p {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.55;
  color: rgba(31, 22, 48, 0.78);
}

.market-feature-photo,
.market-scene-grid figure {
  position: relative;
  overflow: hidden;
  margin: 14px 0 0;
  border-radius: 13px;
  background: #ddd;
}

.market-feature-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.market-feature-photo.is-portrait img {
  aspect-ratio: 3 / 4;
}

.market-feature-photo figcaption,
.market-scene-grid figcaption {
  position: absolute;
  right: 7px;
  bottom: 7px;
  left: 7px;
  padding: 6px 8px;
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  line-height: 1.3;
  border-radius: 8px;
  background: rgba(31, 22, 48, 0.76);
  backdrop-filter: blur(5px);
}

.market-scene-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  margin-top: 14px;
}

.market-scene-grid figure {
  margin: 0;
}

.market-scene-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* ---- Wet-market research modules ---- */
.market-research-block {
  margin-top: 28px;
}

.research-stack {
  display: grid;
  gap: 18px;
}

.research-panel {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(31, 22, 48, 0.09);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 5px 6px 0 rgba(31, 22, 48, 0.08);
}

.research-panel-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.research-panel-head .num {
  color: var(--purple);
  font-family: var(--font-display);
  font-size: 46px;
  line-height: 1;
}

.research-panel:nth-child(2) .research-panel-head .num {
  color: var(--orange);
}

.research-panel-head h4 {
  margin: 2px 0 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 900;
  line-height: 1.2;
}

.research-panel-head .section-kicker {
  margin: 0;
}

.research-panel-tag {
  padding: 6px 10px;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  border-radius: 999px;
  background: var(--purple);
}

.research-panel-tag.is-orange {
  background: var(--orange);
}

.research-panel-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: 18px;
  align-items: start;
  margin-top: 16px;
}

.research-panel-copy h5 {
  margin: 0;
  font-size: 16px;
  font-weight: 900;
}

.research-panel-copy h5:not(:first-child) {
  margin-top: 16px;
}

.research-panel-copy > p {
  margin: 8px 0 0;
  color: rgba(31, 22, 48, 0.8);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.55;
}

.research-checklist {
  margin: 8px 0 0;
  padding-left: 19px;
  color: rgba(31, 22, 48, 0.82);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.5;
}

.research-checklist li + li {
  margin-top: 5px;
}

.process-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 9px 0 0;
  padding: 0;
  list-style: none;
}

.process-tags li {
  padding: 5px 8px;
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  line-height: 1.25;
  border-radius: 999px;
  background: var(--purple-deep);
}

.research-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.research-photo-grid.is-four {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-photo-grid figure {
  position: relative;
  overflow: hidden;
  min-width: 0;
  margin: 0;
  border-radius: 12px;
  background: #ddd;
}

.research-photo-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.research-photo-grid figcaption {
  position: absolute;
  right: 6px;
  bottom: 6px;
  left: 6px;
  padding: 5px 7px;
  color: #fff;
  font-size: 9px;
  font-weight: 800;
  line-height: 1.3;
  border-radius: 7px;
  background: rgba(31, 22, 48, 0.78);
  backdrop-filter: blur(4px);
}

.process-definition {
  margin: 12px 0 0;
  padding: 10px 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 750;
  line-height: 1.45;
  border-left: 4px solid var(--orange);
  border-radius: 0 10px 10px 0;
  background: #fff4b8;
}

.process-definition strong {
  color: var(--orange);
}

.craft-task-divider {
  margin: 34px 0 4px;
  padding: 18px 20px;
  border: 2px solid var(--orange);
  border-radius: 18px;
  background: #fff9d9;
  box-shadow: 6px 7px 0 rgba(107, 47, 255, 0.14);
}

.craft-task-divider span {
  display: inline-block;
  padding: 4px 9px;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.1em;
  border-radius: 999px;
  background: var(--orange);
}

.craft-task-divider h3 {
  margin: 9px 0 0;
  font-size: clamp(21px, 3.8vw, 28px);
  font-weight: 900;
}

.craft-task-divider p {
  margin: 8px 0 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
}

.craft-task-divider strong {
  color: var(--orange);
}

/* ---- Click-to-zoom image lightbox ---- */
main img[role="button"] {
  cursor: zoom-in;
}

.image-lightbox[hidden] {
  display: none;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 60px 64px 52px;
  color: #fff;
  background: rgba(16, 9, 29, 0.94);
  backdrop-filter: blur(12px);
}

.image-lightbox figure {
  display: grid;
  justify-items: center;
  gap: 12px;
  width: min(1120px, 100%);
  max-height: 100%;
  margin: 0;
}

.image-lightbox figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(100vh - 150px);
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}

.image-lightbox figcaption {
  min-height: 1.3em;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  color: rgba(255, 255, 255, 0.86);
}

.image-lightbox-close,
.image-lightbox-nav {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  color: #fff;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.13);
  cursor: pointer;
}

.image-lightbox-close {
  top: 16px;
  right: 18px;
  width: 44px;
  height: 44px;
  font-size: 34px;
  line-height: 1;
}

.image-lightbox-nav {
  top: 50%;
  width: 48px;
  height: 48px;
  font-size: 42px;
  transform: translateY(-50%);
}

.image-lightbox-prev { left: 12px; }
.image-lightbox-next { right: 12px; }

.image-lightbox-hint {
  position: absolute;
  right: 0;
  bottom: 14px;
  left: 0;
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 11px;
  text-align: center;
}

body.is-lightbox-open {
  overflow: hidden;
}

.survey-confirm[hidden] {
  display: none;
}

.survey-confirm {
  position: fixed;
  inset: 0;
  z-index: 1300;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(20, 12, 34, 0.72);
  backdrop-filter: blur(8px);
}

.survey-confirm-card {
  width: min(430px, 100%);
  padding: 28px;
  text-align: center;
  border-radius: 24px;
  background: var(--white);
  box-shadow: 0 24px 70px rgba(20, 12, 34, 0.38);
}

.survey-confirm-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  color: #fff;
  font-family: var(--font-display);
  font-size: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--purple), var(--orange));
}

.survey-confirm-card h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 900;
}

.survey-confirm-card p {
  margin: 12px 0 0;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.65;
  color: rgba(31, 22, 48, 0.72);
}

.survey-confirm-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 22px;
}

.survey-confirm-actions button {
  padding: 12px 16px;
  font: inherit;
  font-size: 15px;
  font-weight: 850;
  border-radius: 999px;
  cursor: pointer;
}

.survey-confirm-cancel {
  color: var(--ink);
  border: 1px solid rgba(31, 22, 48, 0.16);
  background: #f3efea;
}

.survey-confirm-submit {
  color: #fff;
  border: 0;
  background: linear-gradient(135deg, var(--purple), var(--orange));
  box-shadow: 0 8px 18px rgba(107, 47, 255, 0.22);
}

.survey-confirm-actions button:focus-visible {
  outline: 3px solid rgba(107, 47, 255, 0.3);
  outline-offset: 3px;
}

body.is-confirm-open {
  overflow: hidden;
}

/* ---- Craft cases ---- */
.craft-section {
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 61, 0, 0.12), transparent 35%),
    radial-gradient(circle at 90% 20%, rgba(107, 47, 255, 0.12), transparent 40%),
    var(--paper);
}

.case-stack {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.case-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 16px;
  padding: 18px;
  background: var(--white);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.case-card > .module-badge {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.case-media {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  min-height: 240px;
  background: #eee;
}

.case-media img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  object-position: center;
}

.case-no {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
  color: #fff;
  text-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.case-body h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 900;
}

.case-body .sub {
  margin: 6px 0 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--purple);
}

.shot-steps {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.shot-steps li {
  list-style: none;
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  background: var(--paper);
  border-radius: 12px;
  border-left: 4px solid var(--orange);
}

.note-quote {
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
  border-radius: 12px;
  background: rgba(107, 47, 255, 0.08);
}

/* ---- Survey jumps + accordion ---- */
.survey-jumps {
  margin-top: 36px;
  padding: 20px;
  border-radius: 22px;
  background: var(--white);
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 5px 5px 0 rgba(255, 61, 0, 0.12);
}

.survey-jumps p {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
}

.survey-jump-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.jump-btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 18px;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 999px;
  background: var(--purple);
  box-shadow: 0 8px 18px rgba(107, 47, 255, 0.25);
  transition: transform 180ms ease;
}

.jump-btn.is-orange {
  background: linear-gradient(90deg, var(--orange), #ff7a33);
  box-shadow: 0 8px 18px rgba(255, 61, 0, 0.28);
}

.jump-btn:hover {
  transform: translateY(-2px);
}

.surveys-section {
  background:
    radial-gradient(circle at 20% 0%, rgba(107, 47, 255, 0.1), transparent 40%),
    var(--paper);
}

.survey-acc-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.survey-acc {
  background: var(--white);
  border-radius: 20px;
  border: 1px solid rgba(31, 22, 48, 0.08);
  box-shadow: 6px 6px 0 rgba(107, 47, 255, 0.12);
  overflow: hidden;
}

.survey-acc.is-orange {
  box-shadow: 6px 6px 0 rgba(255, 61, 0, 0.14);
}

.survey-acc summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.survey-acc summary::-webkit-details-marker {
  display: none;
}

.survey-acc-idx {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1;
  color: var(--orange);
}

.survey-acc-text strong {
  display: block;
  font-size: 18px;
  font-weight: 900;
}

.survey-acc-text em {
  display: block;
  margin-top: 3px;
  font-style: normal;
  font-size: 12px;
  font-weight: 650;
  color: rgba(31, 22, 48, 0.6);
}

.survey-acc-action {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  border-radius: 999px;
  background: var(--purple);
}

.survey-acc.is-orange .survey-acc-action {
  background: var(--orange);
}

.survey-acc[open] .survey-acc-action {
  background: rgba(31, 22, 48, 0.55);
  font-size: 0;
}

.survey-acc[open] .survey-acc-action::after {
  content: "收起";
  font-size: 12px;
}

.survey-acc-body {
  padding: 0 14px 16px;
}

.survey-acc-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.survey-refresh {
  display: none;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 850;
  line-height: 1;
  border: 0;
  border-radius: 999px;
  background: var(--purple);
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(107, 47, 255, 0.2);
}

.survey-acc[open] .survey-refresh {
  display: inline-flex;
}

.survey-acc.is-orange .survey-refresh {
  background: var(--orange);
  box-shadow: 0 6px 14px rgba(255, 61, 0, 0.2);
}

.survey-refresh:hover {
  filter: brightness(1.08);
}

.survey-refresh:focus-visible {
  outline: 3px solid rgba(107, 47, 255, 0.28);
  outline-offset: 3px;
}

.survey-refresh:disabled {
  opacity: 0.65;
  cursor: wait;
}

.survey-refresh.is-loading span {
  animation: survey-refresh-spin 800ms linear infinite;
}

.survey-refresh-status {
  min-width: 0;
  font-size: 13px;
  font-weight: 700;
  color: rgba(31, 22, 48, 0.62);
}

@keyframes survey-refresh-spin {
  to { transform: rotate(360deg); }
}

.survey-frame {
  width: 100%;
  min-height: 520px;
  overflow: auto;
  border-radius: 14px;
  background: #faf7f2;
}

.survey-frame iframe {
  width: 100% !important;
  max-width: 100% !important;
  border: 0;
}

/* ---- Checklist / outro ---- */
.check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.check-card {
  padding: 18px;
  border-radius: 18px;
  background: var(--white);
  box-shadow: 4px 4px 0 rgba(31, 22, 48, 0.1);
}

.check-card h4 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 900;
}

.check-card ul {
  margin: 0;
  padding-left: 1.1em;
}

.check-card li {
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

.outro {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: #2a1458;
}

.outro-collage {
  position: absolute;
  inset: 0;
  opacity: 0.55;
}

.outro-collage img {
  position: absolute;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.outro-collage .o1 {
  inset: 8% 40% 30% 4%;
  transform: rotate(-3deg);
}

.outro-collage .o2 {
  inset: 28% 4% 8% 42%;
  transform: rotate(4deg);
}

.outro .section-inner {
  min-height: 70svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 20px;
}

.outro h2 {
  margin: 0;
  font-size: clamp(40px, 10vw, 72px);
  font-weight: 900;
  line-height: 1.05;
}

.outro p {
  margin: 14px 0 0;
  max-width: 28em;
  font-size: 16px;
  font-weight: 650;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
}

.footer-note {
  margin-top: 28px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.65);
}

.footer-icp {
  color: inherit;
  text-decoration: none;
}

.footer-icp:hover,
.footer-icp:focus-visible {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

/* ---- Motion ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms cubic-bezier(0.2, 0.7, 0.2, 1),
    transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .path-grid,
  .case-mosaic,
  .info-grid,
  .triple-grid,
  .task-metrics,
  .shared-form-grid,
  .shared-layout-card,
  .market-consume-grid,
  .research-panel-grid,
  .check-grid,
  .case-card,
  .collage-3,
  .photo-pair {
    grid-template-columns: 1fr;
  }

  .observe-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .collage-3 .tall {
    grid-row: auto;
  }

  .intro-head {
    grid-template-columns: 1fr;
  }

  .side-nav {
    top: auto;
    bottom: max(12px, env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    flex-direction: row;
    border-radius: 999px;
    padding: 8px 12px;
  }

  .side-nav-tip {
    left: 50%;
    top: auto;
    bottom: calc(100% + 10px);
    transform: translateX(-50%);
  }

  .side-nav-tip.is-show {
    transform: translateX(-50%);
  }

  .side-nav-tip.is-pulse {
    animation: tip-pulse-mobile 700ms ease;
  }

  @keyframes tip-pulse-mobile {
    0% {
      transform: translateX(-50%) scale(0.92);
    }
    40% {
      transform: translateX(-50%) scale(1.06);
    }
    100% {
      transform: translateX(-50%) scale(1);
    }
  }

  .top-nav-btn {
    min-height: 50px;
    padding: 10px 4px;
    font-size: 13px;
    letter-spacing: 0.04em;
  }

  body {
    padding-top: 50px;
  }

  .anno {
    max-width: 55%;
  }

  .cover-collage .c3,
  .cover-collage .c4 {
    display: none;
  }

  .case-media {
    min-height: 200px;
  }

  .toc-list ul {
    padding-left: 18px;
  }

  .survey-acc summary {
    grid-template-columns: auto 1fr;
    gap: 10px;
  }

  .survey-acc-controls {
    grid-column: 1 / -1;
    justify-self: start;
  }

  .task-brief {
    padding: 18px;
  }

  .task-brief-head {
    align-items: flex-start;
  }

  .task-brief-mark {
    flex-basis: 58px;
    min-height: 58px;
    font-size: 14px;
  }

  .market-feature-photo.is-portrait img {
    aspect-ratio: 4 / 3;
  }

  .research-panel-head {
    grid-template-columns: auto 1fr;
  }

  .research-panel-tag {
    grid-column: 1 / -1;
    justify-self: start;
  }

  .research-photo-grid,
  .research-photo-grid.is-four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .image-lightbox {
    padding: 54px 14px 58px;
  }

  .image-lightbox figure img {
    max-height: calc(100vh - 170px);
  }

  .image-lightbox-nav {
    top: auto;
    bottom: 12px;
    width: 42px;
    height: 42px;
    font-size: 36px;
    transform: none;
  }

  .image-lightbox-prev { left: 14px; }
  .image-lightbox-next { right: 14px; }

  .image-lightbox-hint {
    bottom: 25px;
    padding: 0 58px;
  }
}