:root {
  --ink: #111827;
  --muted: #5b6575;
  --line: #d9e0ea;
  --paper: #fffaf0;
  --blue: #1667e8;
  --sky: #bfe9ff;
  --orange: #ff8a34;
  --yellow: #ffd84d;
  --green: #32b07a;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(23, 35, 64, .16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #fffdf8;
}

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

[hidden] {
  display: none !important;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(20px, 4vw, 56px);
  background: rgba(255, 253, 248, .92);
  border-bottom: 1px solid rgba(17, 24, 39, .08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: var(--white);
  background: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: 4px 4px 0 var(--yellow);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

.top-nav a:hover {
  color: var(--blue);
}

.nav-cta,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  font-weight: 900;
  box-shadow: 4px 4px 0 var(--ink);
}

.nav-cta,
.primary-btn {
  color: var(--ink);
  background: var(--yellow);
}

.secondary-btn {
  background: var(--white);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(48px, 7vw, 86px) clamp(20px, 5vw, 72px) 38px;
  background:
    linear-gradient(180deg, #dff4ff 0%, #fffdf8 72%),
    var(--sky);
  border-bottom: 2px solid var(--ink);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(48px, 8vw, 96px);
  line-height: .95;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 650px;
  color: #263244;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.6;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 32px 0 26px;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-metrics span {
  padding: 12px 14px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  font-weight: 800;
}

.hero-metrics strong {
  margin-right: 5px;
  color: var(--orange);
}

.hero-stage {
  position: relative;
  border: 3px solid var(--ink);
  border-radius: 8px;
  overflow: hidden;
  background: #0c1430;
  box-shadow: 12px 12px 0 var(--ink);
}

.hero-stage img {
  width: 100%;
  height: min(58vw, 560px);
  object-fit: cover;
}

.stage-caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  color: var(--white);
  background: rgba(17, 24, 39, .78);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 8px;
}

.stage-caption span {
  color: var(--yellow);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.stage-caption strong {
  font-size: clamp(16px, 2vw, 22px);
}

.intro-band,
.tracks-section,
.works-section,
.outcomes-section,
.schedule-section,
.daily-section,
.scene-section,
.teacher-section,
.pricing-section,
.difference-section,
.faq-section,
.contact-section {
  padding: clamp(58px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(300px, .8fr);
  gap: 28px;
  align-items: center;
  background: var(--paper);
}

.intro-copy h2,
.section-heading h2,
.scene-copy h2,
.teacher-section h2,
.contact-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.05;
  letter-spacing: 0;
}

.intro-copy p,
.scene-copy p,
.teacher-section p,
.contact-copy p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
  font-weight: 650;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill-row span,
.mentor-points span {
  padding: 12px 14px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 999px;
  font-weight: 900;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.track-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.track-tab {
  min-height: 96px;
  padding: 18px;
  text-align: left;
  cursor: pointer;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform .2s ease, background .2s ease;
}

.track-tab:hover,
.track-tab.is-active {
  transform: translate(-2px, -2px);
  background: var(--yellow);
}

.track-tab span {
  display: block;
  margin-bottom: 8px;
  font-size: 24px;
  font-weight: 950;
}

.track-tab small {
  color: #3f4a5c;
  font-size: 14px;
  font-weight: 800;
}

.track-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .6fr);
  gap: 28px;
  padding: clamp(24px, 4vw, 42px);
  background: #edf8ff;
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 8px 8px 0 var(--ink);
}

.track-panel[data-panel="animation"] {
  background: #fff1e4;
}

.track-text h3 {
  margin-bottom: 16px;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
}

.track-text p {
  color: #314050;
  font-size: 18px;
  line-height: 1.8;
  font-weight: 650;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  font-weight: 850;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 3px;
  width: 16px;
  height: 16px;
  content: "";
  background: var(--green);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.track-info {
  display: grid;
  gap: 12px;
}

.track-info div {
  padding: 18px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
}

.track-info span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.track-info strong {
  font-size: 18px;
}

.works-section {
  background: #101827;
  color: var(--white);
}

.works-section .eyebrow {
  color: var(--yellow);
}

.works-section .section-heading p:not(.eyebrow) {
  max-width: 760px;
  color: #d8dfec;
  font-size: 18px;
  line-height: 1.8;
  font-weight: 650;
}

.project-comparisons {
  display: grid;
  gap: 28px;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(300px, .36fr) minmax(0, 1fr);
  gap: 24px;
  padding: clamp(18px, 3vw, 30px);
  color: var(--ink);
  background: var(--white);
  border: 2px solid var(--white);
  border-radius: 8px;
  box-shadow: 8px 8px 0 rgba(255, 216, 77, .9);
}

.project-title span,
.shot-head span,
.ui-shots span,
.price-card > span,
.difference-grid span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
  text-transform: uppercase;
}

.project-title h3 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.05;
}

.project-title p {
  color: var(--muted);
  line-height: 1.7;
  font-weight: 700;
}

.project-notes {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.project-notes div {
  padding: 12px;
  background: #f8fafc;
  border: 2px solid var(--ink);
  border-radius: 8px;
}

.project-notes strong,
.project-notes em {
  display: block;
}

.project-notes strong {
  margin-bottom: 5px;
  color: var(--blue);
  font-size: 14px;
}

.project-notes em {
  color: #3f4a5c;
  font-size: 14px;
  font-style: normal;
  line-height: 1.55;
  font-weight: 700;
}

.comparison-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.15fr);
  gap: 16px;
  align-items: stretch;
}

.prototype-shot,
.ui-shots figure {
  margin: 0;
  padding: 10px;
  background: #f8fafc;
  border: 2px solid var(--ink);
  border-radius: 8px;
}

.shot-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mini-actions {
  display: inline-flex;
  gap: 8px;
}

.mini-actions button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  color: var(--ink);
  cursor: pointer;
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
}

.prototype-track {
  display: grid;
  grid-auto-columns: 100%;
  grid-auto-flow: column;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.prototype-track figure {
  display: grid;
  place-items: center;
  min-height: 520px;
  margin: 0;
  scroll-snap-align: start;
}

.prototype-track img {
  width: 100%;
  max-height: 520px;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  background: #eef2f7;
}

.ui-shots {
  display: grid;
  grid-auto-columns: minmax(220px, 42%);
  grid-auto-flow: column;
  gap: 10px;
  align-items: start;
  overflow-x: auto;
  padding-bottom: 4px;
  scroll-snap-type: x proximity;
}

.ui-shots figure:first-child {
  background: #fff8d6;
}

.ui-shots figure {
  height: 520px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-snap-align: start;
}

.ui-shots img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: top;
  border-radius: 6px;
  background: #eef2f7;
}

.phone-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 34px);
  align-items: start;
}

.phone-gallery figure {
  margin: 0;
  padding: 14px;
  background: #ffffff;
  border: 2px solid var(--white);
  border-radius: 8px;
  box-shadow: 8px 8px 0 rgba(255, 216, 77, .9);
}

.phone-gallery img {
  width: 100%;
  max-height: 640px;
  object-fit: cover;
  object-position: top;
  border-radius: 6px;
}

.phone-gallery figcaption {
  padding: 14px 4px 2px;
  color: var(--ink);
  font-weight: 900;
}

.outcomes-section {
  background: var(--paper);
}

.outcome-grid,
.pricing-grid,
.difference-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.outcome-grid article,
.price-card,
.difference-grid article {
  padding: 24px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 5px 5px 0 var(--ink);
}

.outcome-grid h3,
.price-card h3,
.difference-grid h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

.outcome-grid p,
.price-card p,
.difference-grid p {
  color: var(--muted);
  line-height: 1.7;
  font-weight: 650;
}

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

.timeline article {
  min-height: 250px;
  padding: 24px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 6px 6px 0 var(--orange);
}

.timeline span {
  display: inline-block;
  margin-bottom: 28px;
  padding: 8px 12px;
  color: var(--white);
  background: var(--blue);
  border-radius: 8px;
  font-weight: 950;
}

.timeline h3 {
  margin-bottom: 12px;
  font-size: 26px;
}

.timeline p {
  color: var(--muted);
  line-height: 1.7;
  font-weight: 650;
}

.daily-section {
  background: #fff7eb;
}

.daily-section .section-heading p:not(.eyebrow) {
  max-width: 820px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
  font-weight: 650;
}

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

.daily-card {
  padding: clamp(18px, 3vw, 28px);
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 6px 6px 0 var(--ink);
}

.daily-head {
  margin-bottom: 18px;
}

.daily-head span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
  text-transform: uppercase;
}

.daily-head h3 {
  margin-bottom: 0;
  font-size: clamp(26px, 3.5vw, 40px);
  line-height: 1.12;
}

.daily-card details {
  box-shadow: none;
}

.daily-card details + details {
  margin-top: 12px;
}

.daily-card summary {
  padding: 16px 18px;
  font-size: 17px;
}

.day-detail {
  padding: 0 18px 18px;
}

.day-detail h4 {
  margin: 16px 0 8px;
  font-size: 17px;
}

.day-detail p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-weight: 650;
}

.day-detail ul {
  display: grid;
  gap: 7px;
  margin: 12px 0 0;
  padding-left: 20px;
  color: #334155;
  line-height: 1.65;
  font-weight: 750;
}

.scene-section {
  display: grid;
  grid-template-columns: minmax(300px, .72fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  background: #eaf6eb;
}

.activity-carousel {
  position: relative;
  min-width: 0;
}

.carousel-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-bottom: 12px;
}

.carousel-btn {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--ink);
  cursor: pointer;
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 3px 3px 0 var(--ink);
  font-size: 28px;
  font-weight: 950;
  line-height: 1;
}

.activity-track {
  display: grid;
  grid-auto-columns: minmax(300px, 74%);
  grid-auto-flow: column;
  gap: 16px;
  overflow-x: auto;
  padding: 0 8px 14px 0;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.activity-track figure {
  display: grid;
  place-items: center;
  min-height: 360px;
  margin: 0;
  padding: 12px;
  background: #f8fafc;
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 5px 5px 0 var(--ink);
  scroll-snap-align: start;
}

.activity-track img {
  width: 100%;
  height: 360px;
  object-fit: contain;
  border-radius: 6px;
  background: #e8eef6;
}

.teacher-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .55fr);
  gap: 36px;
  align-items: center;
  background: var(--white);
}

.mentor-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pricing-section {
  background: #edf8ff;
}

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

.price-card {
  box-shadow: 7px 7px 0 var(--blue);
}

.price-card h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: clamp(44px, 6vw, 72px);
  line-height: 1;
}

.price-card small {
  font-size: 18px;
}

.price-card ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.price-card li {
  position: relative;
  padding-left: 25px;
  line-height: 1.6;
  font-weight: 800;
}

.price-card li::before {
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  content: "";
  background: var(--orange);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.difference-section {
  display: grid;
  grid-template-columns: minmax(260px, .55fr) minmax(0, 1fr);
  gap: 32px;
  background: #fff7eb;
}

.difference-section h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
}

.difference-grid {
  grid-template-columns: 1fr;
}

.difference-grid strong {
  display: block;
  margin-top: 12px;
  font-size: 18px;
  line-height: 1.5;
}

.faq-section {
  background: #f4f0ff;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 960px;
}

details {
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 4px 4px 0 var(--ink);
}

summary {
  padding: 18px 20px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 950;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 650;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .48fr);
  gap: 28px;
  align-items: center;
  color: var(--white);
  background: #101827;
}

.contact-section .eyebrow {
  color: var(--yellow);
}

.contact-copy p {
  color: #d8dfec;
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: center;
  padding: 28px;
  color: var(--ink);
  background: var(--yellow);
  border: 2px solid var(--white);
  border-radius: 8px;
  box-shadow: 8px 8px 0 var(--white);
}

.contact-card span,
.contact-card small {
  display: block;
  font-weight: 900;
}

.contact-card a {
  display: block;
  margin: 10px 0 14px;
  font-size: clamp(30px, 3.4vw, 42px);
  line-height: 1;
  font-weight: 950;
}

.contact-card small {
  color: #4a3e17;
  line-height: 1.6;
}

.qr-code {
  width: 150px;
  aspect-ratio: 1;
  object-fit: contain;
  justify-self: start;
  padding: 8px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 8px;
}

@media (max-width: 980px) {
  .top-nav {
    display: none;
  }

  .hero,
  .intro-band,
  .track-panel,
  .scene-section,
  .teacher-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-stage img {
    height: 420px;
  }

  .phone-gallery,
  .timeline,
  .daily-grid,
  .outcome-grid,
  .pricing-grid,
  .difference-section {
    grid-template-columns: 1fr;
  }

  .project-card,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .prototype-track figure {
    min-height: 430px;
  }

  .prototype-track img {
    max-height: none;
  }

  .ui-shots figure {
    height: 430px;
  }

  .phone-gallery {
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 64px;
  }

  .brand {
    font-size: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .nav-cta {
    min-height: 40px;
    padding: 0 12px;
    font-size: 14px;
  }

  .contact-card {
    grid-template-columns: 1fr;
  }

  .qr-code {
    width: min(190px, 70vw);
    justify-self: center;
  }

  .hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 50px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-stage {
    box-shadow: 7px 7px 0 var(--ink);
  }

  .hero-stage img {
    height: 300px;
  }

  .stage-caption {
    position: static;
    display: block;
    border-radius: 0;
  }

  .stage-caption span {
    display: block;
    margin-bottom: 5px;
  }

  .track-tabs {
    grid-template-columns: 1fr;
  }

  .track-tab span {
    font-size: 21px;
  }

  .ui-shots {
    grid-auto-columns: 78%;
    grid-auto-flow: column;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .activity-track {
    grid-auto-columns: minmax(270px, 88%);
  }

  .activity-track figure {
    min-height: 300px;
  }

  .activity-track img {
    height: 300px;
  }
}