:root {
  color-scheme: dark;
  --ink: #f7f3e8;
  --muted: #b9c0b6;
  --deep: #080c0d;
  --panel: #111818;
  --panel-soft: rgba(247, 243, 232, 0.055);
  --line: rgba(247, 243, 232, 0.16);
  --line-strong: rgba(247, 243, 232, 0.28);
  --teal: #27dcc3;
  --teal-dark: #0b7d73;
  --warm: #e5ad63;
  --paper: #eef1e8;
  --paper-ink: #0d1414;
  --max: 1180px;
  --header: 72px;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 8%, rgba(39, 220, 195, 0.14), transparent 28vw),
    radial-gradient(circle at 86% 18%, rgba(229, 173, 99, 0.11), transparent 24vw),
    linear-gradient(180deg, #080c0d 0%, #0b1010 46%, #080c0d 100%);
  color: var(--ink);
  letter-spacing: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(247, 243, 232, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 243, 232, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, black, transparent 88%);
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(8, 12, 13, 0.92), rgba(8, 12, 13, 0));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  box-shadow: 0 0 24px rgba(39, 220, 195, 0.22);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  color: rgba(247, 243, 232, 0.76);
  font-size: 14px;
}

.site-header nav a {
  transition: color 180ms ease, transform 180ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: var(--ink);
  transform: translateY(-1px);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  overflow: hidden;
}

.hero__image,
.hero__shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__image {
  object-fit: cover;
  object-position: center center;
  transform: scale(1.04);
  filter: saturate(0.94) contrast(1.08);
  animation: heroImage 1200ms ease forwards;
}

.hero__shade {
  background:
    linear-gradient(90deg, rgba(8, 12, 13, 0.96) 0%, rgba(8, 12, 13, 0.78) 36%, rgba(8, 12, 13, 0.28) 66%, rgba(8, 12, 13, 0.58) 100%),
    linear-gradient(0deg, rgba(8, 12, 13, 0.72), rgba(8, 12, 13, 0.08) 48%);
}

.hero__shade::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0 48%, rgba(39, 220, 195, 0.16) 48.2% 48.45%, transparent 48.7%);
}

.hero__content {
  position: relative;
  z-index: 2;
  width: min(820px, calc(100% - 36px));
  margin-left: clamp(18px, 8vw, 112px);
  padding-top: var(--header);
  padding-bottom: 96px;
}

.eyebrow,
.section__kicker {
  margin: 0 0 18px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.manifesto h2,
.workflow h2,
.use-cases h2,
.product h2,
.course h2,
.curriculum h2,
.audience h2,
.enroll h2,
.media-section h2 {
  margin: 0;
  font-family: "Noto Serif TC", "Songti TC", "YuMincho", "Iowan Old Style", serif;
  font-weight: 700;
  letter-spacing: -0.045em;
}

.hero h1 {
  max-width: 860px;
  font-size: clamp(54px, 8vw, 122px);
  line-height: 0.98;
}

.hero__lead {
  max-width: 680px;
  margin: 30px 0 0;
  color: rgba(247, 243, 232, 0.88);
  font-size: clamp(20px, 2.2vw, 30px);
  line-height: 1.48;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button--primary {
  background: var(--teal);
  color: #031210;
  box-shadow: 0 14px 44px rgba(39, 220, 195, 0.22);
}

.button--primary:hover,
.button--primary:focus-visible {
  box-shadow: 0 18px 54px rgba(39, 220, 195, 0.3);
}

.button--quiet {
  border-color: rgba(247, 243, 232, 0.34);
  color: var(--ink);
  background: rgba(247, 243, 232, 0.06);
}

.hero__signal {
  position: absolute;
  z-index: 2;
  left: clamp(18px, 8vw, 112px);
  right: clamp(18px, 8vw, 112px);
  bottom: 24px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  color: rgba(247, 243, 232, 0.88);
  font-size: clamp(15px, 1.15vw, 18px);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.hero__signal span {
  min-height: 52px;
  display: flex;
  align-items: center;
  border-right: 1px solid var(--line);
}

.hero__signal span:last-child {
  border-right: 0;
}

.section {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(76px, 12vw, 150px) 0;
}

.manifesto {
  max-width: 980px;
  margin-left: clamp(18px, 12vw, 170px);
}

.manifesto h2,
.workflow h2,
.use-cases h2,
.product h2,
.curriculum h2,
.audience h2,
.media-section h2 {
  max-width: 900px;
  font-size: clamp(34px, 5vw, 78px);
  line-height: 1.05;
}

.manifesto p,
.workflow__copy p,
.media-section__copy p,
.course p,
.enroll p,
.product p,
.case-card p {
  max-width: 700px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.78;
}

.workflow {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(42px, 8vw, 96px);
  align-items: start;
  border-top: 1px solid var(--line);
}

.workflow__copy {
  position: sticky;
  top: calc(var(--header) + 38px);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 34px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 22px rgba(39, 220, 195, 0.55);
  opacity: 0;
  transform: translateX(-18px);
  transition: opacity 280ms ease, transform 280ms ease;
}

.step:hover::before {
  opacity: 1;
  transform: translateX(-4px);
}

.step__index {
  grid-row: 1 / span 2;
  color: var(--warm);
  font-size: 13px;
  font-weight: 900;
}

.step h3,
.product h3,
.case-card h3 {
  grid-column: 2;
  margin: 0;
  font-size: clamp(22px, 2vw, 28px);
}

.step p {
  grid-column: 2;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.media-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: center;
  padding: clamp(72px, 10vw, 130px) clamp(18px, 5vw, 72px);
  background: var(--paper);
  color: var(--paper-ink);
}

.media-section__image {
  overflow: hidden;
  min-height: 380px;
  background: #dfe7dc;
  box-shadow: 0 28px 70px rgba(8, 12, 13, 0.18);
}

.media-section__image img {
  width: 100%;
  height: 100%;
  min-height: 380px;
  object-fit: cover;
  transition: transform 500ms ease;
}

.media-section__image:hover img {
  transform: scale(1.03);
}

.media-section .section__kicker {
  color: var(--teal-dark);
}

.media-section__copy p {
  color: #425350;
}

.divider-list {
  margin-top: 34px;
  border-top: 1px solid rgba(13, 20, 20, 0.2);
}

.divider-list span {
  display: block;
  padding: 15px 0;
  border-bottom: 1px solid rgba(13, 20, 20, 0.16);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  color: #173c38;
}

.use-cases {
  border-bottom: 1px solid var(--line);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 44px;
}

.case-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 26px;
  background:
    linear-gradient(180deg, rgba(247, 243, 232, 0.08), rgba(247, 243, 232, 0.025)),
    var(--panel);
  transition: transform 220ms ease, border-color 220ms ease, background-color 220ms ease;
}

.case-card:hover {
  transform: translateY(-6px);
  border-color: rgba(39, 220, 195, 0.55);
}

.case-card span {
  margin-bottom: auto;
  color: var(--warm);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.case-card p {
  margin-top: 14px;
  font-size: 16px;
}

.product {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(340px, 1fr);
  gap: clamp(34px, 7vw, 90px);
}

.product__grid {
  border-top: 1px solid var(--line);
}

.product__grid > div {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.product__grid p {
  font-size: 17px;
}

.course {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(54px, 8vw, 92px);
  border: 1px solid rgba(39, 220, 195, 0.3);
  border-radius: 36px;
  background:
    radial-gradient(circle at 88% 12%, rgba(39, 220, 195, 0.2), transparent 26vw),
    linear-gradient(135deg, rgba(247, 243, 232, 0.09), rgba(247, 243, 232, 0.035));
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.22);
}

.course__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.52fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: start;
}

.course h2,
.enroll h2 {
  max-width: 850px;
  font-size: clamp(38px, 6vw, 86px);
  line-height: 1.02;
}

.course-card {
  border-left: 1px solid var(--line-strong);
  padding-left: clamp(20px, 4vw, 42px);
}

.course-card__label {
  display: block;
  margin-bottom: 18px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.course-card strong {
  display: block;
  max-width: 420px;
  font-family: "Noto Serif TC", "Songti TC", "YuMincho", serif;
  font-size: clamp(30px, 3.2vw, 44px);
  line-height: 1.12;
}

.course-card p {
  max-width: 420px;
  margin-bottom: 24px;
  font-size: 17px;
}

.course-card__meta {
  display: grid;
  gap: 10px;
  margin: 24px 0 28px;
}

.course-card__meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  color: rgba(247, 243, 232, 0.78);
  font-size: 14px;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 44px;
  background: var(--line);
  border: 1px solid var(--line);
}

.curriculum-item {
  min-height: 86px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
  background: var(--deep);
  color: rgba(247, 243, 232, 0.9);
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.45;
}

.curriculum-item span {
  color: var(--warm);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.audience {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.9fr);
  gap: clamp(34px, 7vw, 90px);
  border-top: 1px solid var(--line);
}

.audience-list {
  border-top: 1px solid var(--line);
}

.audience-list span {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  color: rgba(247, 243, 232, 0.86);
  font-size: clamp(17px, 1.8vw, 23px);
  line-height: 1.5;
}

.enroll {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto clamp(34px, 7vw, 82px);
  padding: clamp(64px, 10vw, 118px) clamp(24px, 6vw, 76px);
  border-radius: 38px;
  color: var(--paper-ink);
  background:
    linear-gradient(135deg, rgba(238, 241, 232, 0.94), rgba(207, 231, 222, 0.94)),
    var(--paper);
}

.enroll__inner {
  max-width: 940px;
}

.enroll .eyebrow {
  color: var(--teal-dark);
}

.enroll p {
  color: #40524d;
}

.enroll .button {
  margin-top: 30px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px clamp(18px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: rgba(247, 243, 232, 0.58);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 620ms ease, transform 620ms ease;
}

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

@keyframes heroImage {
  to {
    transform: scale(1);
  }
}

@media (max-width: 980px) {
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  :root {
    --header: 64px;
  }

  .site-header {
    padding-inline: 16px;
  }

  .site-header nav {
    gap: 14px;
  }

  .hero {
    min-height: 760px;
  }

  .hero__image {
    object-position: 58% center;
  }

  .hero__shade {
    background:
      linear-gradient(180deg, rgba(8, 12, 13, 0.9), rgba(8, 12, 13, 0.54) 44%, rgba(8, 12, 13, 0.92)),
      linear-gradient(90deg, rgba(8, 12, 13, 0.9), rgba(8, 12, 13, 0.12));
  }

  .hero__content {
    width: calc(100% - 36px);
    margin: 0 18px;
    align-self: end;
    padding-bottom: 88px;
  }

  .hero h1 {
    font-size: clamp(48px, 13vw, 72px);
  }

  .hero__signal {
    left: 18px;
    right: 18px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .hero__signal span {
    min-height: 44px;
    justify-content: center;
    font-size: 14px;
  }

  .manifesto {
    margin-left: auto;
  }

  .workflow,
  .media-section,
  .product,
  .course__inner,
  .audience {
    grid-template-columns: 1fr;
  }

  .workflow__copy {
    position: static;
  }

  .media-section {
    padding-inline: 18px;
  }

  .course {
    padding-inline: clamp(22px, 5vw, 42px);
    border-radius: 28px;
  }

  .course-card {
    border-left: 0;
    border-top: 1px solid var(--line-strong);
    padding: 28px 0 0;
  }
}

@media (max-width: 620px) {
  .site-header nav {
    display: none;
  }

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

  .button {
    width: 100%;
  }

  .step {
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }

  .case-grid,
  .curriculum-grid {
    grid-template-columns: 1fr;
  }

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

  .media-section__image,
  .media-section__image img {
    min-height: 280px;
  }

  .enroll {
    border-radius: 28px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }

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