:root {
  --bg: #f6f6f4;
  --ink: #111112;
  --muted: #696965;
  --line: rgba(17, 17, 18, 0.12);
  --yellow: #ffc83d;
  --gold: #e99719;
  --cream: #fff7dc;
  --blue: #1777ff;
  --nav: rgba(248, 248, 246, 0.78);
  --radius: 8px;
  font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(24px);
}

.global-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 24px;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  gap: 10px;
  font-size: 14px;
  font-weight: 900;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--yellow);
  font-size: 13px;
}

.nav-links a {
  color: #353536;
  font-size: 12px;
  font-weight: 700;
}

.buy-button,
.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.ip-hero {
  position: relative;
  min-height: 0;
  height: calc(100vw * 941 / 1672);
  display: grid;
  grid-template-rows: 1fr;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: #f6bd13;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-color: #f6bd13;
  background-image: url("assets/ip/huibao-hero-main.png");
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  transform: translateY(calc(var(--hero-progress, 0) * 18px)) scale(calc(1 + var(--hero-progress, 0) * 0.015));
  will-change: transform;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 18%, transparent 78%, rgba(111, 69, 0, 0.12)),
    radial-gradient(circle at 67% 45%, rgba(255, 255, 255, 0.16), transparent 30%);
  pointer-events: none;
}

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

.eyebrow {
  margin: 0 0 14px;
  color: #ffe08a;
  font-size: 17px;
  font-weight: 900;
}

.eyebrow.dark {
  color: #9d6507;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(92px, 18vw, 230px);
  line-height: 0.82;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 840px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(20px, 2.55vw, 34px);
  line-height: 1.28;
  font-weight: 800;
}

.hero-character {
  display: none;
}

.hero-stats {
  display: none;
}

.hero-stats span {
  padding: 16px 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.26);
  font-size: 13px;
}

.hero-stats strong {
  display: block;
  color: #fff;
  font-size: 28px;
  line-height: 1.05;
}

.intro-strip {
  padding: 28px 24px 34px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.intro-inner {
  display: inline-grid;
  grid-template-columns: repeat(4, minmax(112px, 1fr));
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f6f4ef;
}

.intro-inner span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: #111112;
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}

.intro-inner span:not(:first-child) {
  background: transparent;
  color: #4b4b47;
}

.intro-strip p {
  max-width: 780px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  font-weight: 600;
}

.scroll-scene {
  --progress: 0;
  position: relative;
}

.sticky-stage {
  position: sticky;
  top: 52px;
  min-height: calc(100vh - 52px);
  overflow: hidden;
}

.story-scene {
  min-height: 410vh;
  background: #0b0b0b;
  color: #fff;
}

.story-stage {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(360px, 1.05fr);
  gap: 20px;
  align-items: center;
  padding: 56px max(24px, 7vw);
  background:
    radial-gradient(circle at calc(70% - var(--progress) * 25%) 42%, rgba(255, 200, 61, 0.26), transparent 34%),
    linear-gradient(180deg, #111 0%, #030303 100%);
}

.story-copy {
  position: relative;
  z-index: 4;
  max-width: 610px;
  transform: translateY(calc(var(--progress) * -44px));
}

h2 {
  margin-bottom: 0;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.96;
  font-weight: 900;
  letter-spacing: 0;
}

.story-copy p:last-child,
.motion-copy p:last-child,
.final-section p:last-child {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.55;
  font-weight: 700;
}

.persona-frame {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: end center;
  min-height: 720px;
}

.persona-image {
  position: absolute;
  bottom: -8%;
  width: min(620px, 48vw);
  opacity: 0;
  filter: drop-shadow(0 40px 80px rgba(0, 0, 0, 0.45));
  transform: translateY(70px) scale(0.84) rotate(0deg);
  transition: opacity 420ms ease, transform 620ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.persona-image.active {
  opacity: 1;
  transform: translateY(calc(34px - var(--progress) * 42px)) scale(calc(0.92 + var(--progress) * 0.12)) rotate(calc((var(--active-step, 0) - 1.5) * 2deg));
}

.orb {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 200, 61, 0.85);
  filter: blur(26px);
  opacity: 0.34;
}

.orb-one {
  width: 180px;
  height: 180px;
  right: 8%;
  top: 14%;
  transform: translateY(calc(var(--progress) * 90px));
}

.orb-two {
  width: 110px;
  height: 110px;
  left: 16%;
  bottom: 16%;
  background: rgba(255, 255, 255, 0.7);
  transform: translateY(calc(var(--progress) * -80px));
}

.story-steps {
  position: absolute;
  z-index: 5;
  left: max(24px, 7vw);
  right: max(24px, 7vw);
  bottom: 36px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.story-step {
  min-height: 132px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
  color: rgba(255, 255, 255, 0.55);
  transform: translateY(14px);
  transition: color 320ms ease, border-color 320ms ease, background 320ms ease, transform 320ms ease;
}

.story-step.active {
  color: #fff;
  border-color: rgba(255, 200, 61, 0.58);
  background: rgba(255, 200, 61, 0.12);
  transform: translateY(0);
}

.story-step span {
  display: block;
  margin-bottom: 12px;
  color: var(--yellow);
  font-size: 12px;
  font-weight: 900;
}

.story-step strong {
  display: block;
  margin-bottom: 8px;
  font-size: 22px;
}

.story-step p {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
}

.design-section,
.world-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 106px 24px;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 36px;
}

.section-heading.compact {
  max-width: 760px;
}

.turnaround-panel {
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.turnaround-panel img {
  width: 100%;
}

.design-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.design-notes article {
  min-height: 220px;
  padding: 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.design-notes span,
.world-card span {
  display: inline-block;
  margin-bottom: 22px;
  color: #a56707;
  font-size: 12px;
  font-weight: 900;
}

.design-notes h3,
.world-card h3 {
  margin-bottom: 14px;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.08;
  font-weight: 900;
}

.design-notes p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.motion-scene {
  min-height: auto;
  background: #fff;
}

.motion-stage {
  max-width: 1180px;
  margin: 0 auto;
  padding: 106px 24px;
  background:
    linear-gradient(180deg, #fff 0%, #fff8de 52%, #fff 100%);
}

.motion-copy {
  position: relative;
  z-index: 5;
  max-width: 960px;
  padding: 0 24px;
  margin: 0 auto;
  text-align: center;
}

.motion-copy p:last-child {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(17, 17, 18, 0.62);
}

.expression-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  grid-template-rows: auto auto;
  gap: 18px;
  margin-top: 44px;
}

.expression-card {
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid rgba(17, 17, 18, 0.08);
  box-shadow: 0 28px 90px rgba(176, 121, 13, 0.12);
}

.expression-main {
  grid-row: 1 / span 2;
  background: #fff;
}

.expression-main img,
.sticker-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.expression-main img {
  transform: scale(1.015);
}

.sticker-card {
  display: grid;
  gap: 18px;
  padding: 16px;
}

.sticker-card img {
  aspect-ratio: 16 / 10;
  border-radius: 6px;
}

.sticker-card div,
.tone-card {
  padding: 8px;
}

.sticker-card span,
.tone-card span {
  display: inline-block;
  margin-bottom: 14px;
  color: #a56707;
  font-size: 12px;
  font-weight: 900;
}

.sticker-card h3,
.tone-card h3 {
  margin-bottom: 0;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.08;
  font-weight: 900;
}

.tone-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(145deg, #121212, #2a1a00);
  color: #fff;
}

.tone-card span {
  color: #ffe08a;
}

.tone-card p {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 650;
}

.expression-card {
  transition: transform 500ms ease, box-shadow 500ms ease;
}

.expression-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 34px 100px rgba(176, 121, 13, 0.18);
}

.sticker-card p {
  margin: 12px 4px 4px;
  color: #4c4b48;
  font-size: 14px;
  line-height: 1.55;
  font-weight: 700;
}

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

.world-card {
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.world-card.wide {
  grid-column: 1 / -1;
}

.world-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transform: scale(1.04);
  transition: transform 900ms ease;
}

.world-card.visible img {
  transform: scale(1);
}

.world-card div {
  padding: 24px;
}

.world-card p {
  color: var(--muted);
}

.final-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(300px, 1fr);
  align-items: center;
  gap: 28px;
  min-height: 90vh;
  padding: 86px max(24px, 8vw);
  overflow: hidden;
  background: #0b0b0b;
  color: #fff;
}

.final-section img {
  width: min(460px, 90vw);
  justify-self: center;
  filter: drop-shadow(0 35px 70px rgba(255, 200, 61, 0.22));
}

.final-section h2 {
  max-width: 820px;
}

.site-footer {
  padding: 28px 24px;
  background: #f0efeb;
  color: #77736a;
  text-align: center;
  font-size: 12px;
}

.site-footer p {
  margin: 0;
}

.home-page {
  background: #f6f6f4;
}

.home-hero {
  min-height: calc(100vh - 52px);
  display: grid;
  align-content: center;
  gap: 48px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 92px 24px 80px;
}

.home-copy {
  max-width: 930px;
}

.home-copy h1 {
  max-width: 1020px;
  margin-bottom: 22px;
  color: var(--ink);
  font-size: clamp(48px, 8vw, 108px);
  line-height: 0.98;
}

.home-copy p:last-child {
  max-width: 700px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.55;
  font-weight: 700;
}

.featured-work {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 30px 90px rgba(37, 26, 3, 0.08);
}

.featured-media {
  min-height: 430px;
  background: #f7bc14;
}

.featured-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-info {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
}

.featured-info span,
.home-grid span {
  margin-bottom: 20px;
  color: #a56707;
  font-size: 12px;
  font-weight: 900;
}

.featured-info h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1;
}

.featured-info p {
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 650;
}

.featured-info strong {
  color: var(--blue);
  font-size: 15px;
}

.home-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 96px 24px;
}

.home-section > h2 {
  max-width: 860px;
  margin-bottom: 34px;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.home-grid article {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.home-grid h3 {
  margin-bottom: 14px;
  font-size: 30px;
  line-height: 1.1;
}

.home-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.home-contact {
  min-height: 70vh;
  display: grid;
  place-items: center;
  align-content: center;
  padding: 90px 24px;
  background: #0b0b0b;
  color: #fff;
  text-align: center;
}

.home-contact h2 {
  max-width: 880px;
}

.home-contact p:not(.eyebrow) {
  max-width: 680px;
  margin: 22px auto 28px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 20px;
  line-height: 1.55;
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 720ms ease, transform 720ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .nav-links {
    display: none;
  }

  .hero-character {
    display: none;
  }

  .hero-copy {
    position: absolute;
  }

  .hero-bg {
    background-size: contain;
    background-position: center;
  }

  .hero-stats,
  .design-notes,
  .world-grid,
  .story-stage,
  .final-section,
  .featured-work,
  .home-grid {
    grid-template-columns: 1fr;
  }

  .featured-media {
    min-height: 320px;
  }

  .story-stage {
    align-items: start;
    padding: 42px 18px;
  }

  .persona-frame {
    min-height: 520px;
  }

  .persona-image {
    width: min(440px, 84vw);
  }

  .story-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    left: 18px;
    right: 18px;
  }

  .story-step {
    min-height: 112px;
    padding: 14px;
  }

  .world-card.wide {
    grid-column: auto;
  }

  .expression-layout {
    grid-template-columns: 1fr;
  }

  .expression-main {
    grid-row: auto;
  }

  .final-section {
    text-align: center;
  }
}

@media (max-width: 620px) {
  .global-nav {
    padding: 0 14px;
  }

  h1 {
    font-size: clamp(78px, 30vw, 124px);
  }

  h2 {
    font-size: clamp(40px, 12vw, 62px);
  }

  .hero-subtitle {
    font-size: 19px;
  }

  .ip-hero {
    height: max(420px, calc(100vw * 941 / 1672));
  }

  .hero-stats {
    grid-template-columns: 1fr;
    margin-bottom: 18px;
  }

  .intro-inner {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-radius: 18px;
  }

  .intro-inner span {
    border-radius: 12px;
  }

  .story-scene {
    min-height: auto;
  }

  .story-scene .sticky-stage {
    position: relative;
    top: auto;
    min-height: auto;
    overflow: visible;
  }

  .story-stage {
    display: flex;
    flex-direction: column;
    min-height: auto;
    gap: 28px;
    padding: 44px 16px 52px;
    background:
      radial-gradient(circle at 50% 48%, rgba(255, 200, 61, 0.26), transparent 38%),
      linear-gradient(180deg, #111 0%, #030303 100%);
  }

  .story-copy {
    max-width: none;
    transform: none;
  }

  .story-copy .eyebrow {
    margin-bottom: 10px;
    font-size: 13px;
  }

  .story-copy h2 {
    font-size: clamp(30px, 9.6vw, 42px);
    line-height: 1.08;
  }

  .story-copy p:last-child,
  .motion-copy p:last-child {
    font-size: 17px;
  }

  .persona-frame {
    min-height: 0;
    place-items: center;
    padding: 6px 0 0;
  }

  .persona-image {
    display: none;
    position: relative;
    bottom: auto;
    width: min(310px, 74vw);
    opacity: 1;
    transform: none;
    filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.5));
  }

  .persona-image.active {
    display: block;
    transform: none;
  }

  .orb {
    display: none;
  }

  .story-steps {
    position: static;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 0;
  }

  .story-step {
    min-height: auto;
    padding: 16px;
    transform: none;
  }

  .story-step.active {
    transform: none;
  }

  .story-step strong {
    margin-bottom: 0;
    font-size: 23px;
  }

  .story-step p {
    display: none;
  }

  .design-section,
  .world-section {
    padding: 72px 16px;
  }

  .motion-stage {
    padding: 72px 16px;
  }

  .sticker-card {
    margin: 0;
  }

  .tone-card {
    min-height: 220px;
  }
}