:root {
  --ink: #222236;
  --muted: #686174;
  --paper: #fffaf6;
  --cream: #fff4df;
  --purple: #7440b8;
  --purple-deep: #4f2b88;
  --pink: #f05286;
  --teal: #1b9aa2;
  --green: #61b83f;
  --yellow: #f7b928;
  --line: rgba(116, 64, 184, 0.16);
  --shadow: 0 18px 45px rgba(60, 38, 91, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}

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;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 250, 246, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-title {
  display: block;
  font-size: 18px;
  font-weight: 900;
  color: var(--purple-deep);
  line-height: 1.2;
}

.brand-subtitle {
  display: block;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  font-weight: 700;
  color: #4c4558;
  white-space: nowrap;
}

.nav a {
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--purple);
  border-color: var(--yellow);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  color: #fff;
  background: var(--purple);
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(116, 64, 184, 0.22);
}

.hero {
  min-height: 86vh;
  display: grid;
  align-items: end;
  position: relative;
  padding: 120px clamp(20px, 5vw, 72px) 52px;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(255, 250, 246, 0.94) 0%, rgba(255, 250, 246, 0.76) 34%, rgba(255, 250, 246, 0.16) 70%),
    url("assets/taotao-campus.jpg") center / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 18px;
  z-index: -1;
  background: linear-gradient(90deg, var(--purple) 0 24%, var(--pink) 24% 48%, var(--yellow) 48% 72%, var(--teal) 72% 100%);
}

.hero-content {
  width: min(720px, 100%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 4px;
  border-radius: 999px;
  background: var(--yellow);
}

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

h1 {
  max-width: 620px;
  margin-bottom: 18px;
  color: var(--purple-deep);
  font-size: clamp(42px, 8vw, 84px);
  line-height: 1.04;
  font-weight: 900;
}

.hero-lede {
  max-width: 570px;
  margin-bottom: 30px;
  color: #42394d;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 600;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-weight: 900;
}

.button.primary {
  color: #fff;
  background: var(--pink);
  box-shadow: 0 12px 26px rgba(240, 82, 134, 0.24);
}

.button.secondary {
  color: var(--purple-deep);
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(116, 64, 184, 0.22);
}

.section {
  padding: clamp(58px, 8vw, 96px) clamp(20px, 5vw, 72px);
  scroll-margin-top: 88px;
}

.section.alt {
  background: #fff;
}

.section-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 34px;
}

.section-heading.center {
  text-align: center;
  justify-items: center;
}

.section-kicker {
  color: var(--pink);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

h2 {
  margin-bottom: 0;
  color: var(--purple-deep);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  font-weight: 900;
}

.section-heading p {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  min-height: 210px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(62, 42, 88, 0.08);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--purple);
  border-radius: 18px 18px 18px 4px;
  font-size: 24px;
  font-weight: 900;
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--green);
}

.feature-card:nth-child(3) .feature-icon {
  background: var(--yellow);
  color: var(--ink);
}

.feature-card:nth-child(4) .feature-icon {
  background: var(--pink);
}

.feature-card h3 {
  margin-bottom: 8px;
  font-size: 22px;
  line-height: 1.25;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: center;
}

.photo-stack {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 16px;
  align-items: end;
}

.photo-stack img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.photo-stack img:first-child {
  aspect-ratio: 3 / 4;
}

.photo-stack img:last-child {
  aspect-ratio: 4 / 3;
}

.soft-panel {
  padding: clamp(28px, 4vw, 42px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.soft-panel p {
  color: var(--muted);
  font-size: 17px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 14px;
  color: var(--purple-deep);
  background: #f3eafb;
  border: 1px solid rgba(116, 64, 184, 0.16);
  border-radius: 999px;
  font-weight: 800;
}

.app-band {
  padding-top: 104px;
  background:
    linear-gradient(135deg, rgba(116, 64, 184, 0.94), rgba(80, 43, 136, 0.96)),
    url("assets/back-to-school.jpg") center / cover no-repeat;
  color: #fff;
}

.app-band h2,
.app-band .section-kicker {
  color: #fff;
}

.app-band .section-heading p {
  color: rgba(255, 255, 255, 0.86);
}

.pikogo-logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 18px;
}

.pikogo-logo-lockup img {
  width: 88px;
  height: 88px;
  flex: 0 0 88px;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.86);
  border-radius: 24px;
  box-shadow: 0 18px 36px rgba(37, 27, 59, 0.22);
}

.pikogo-logo-lockup span {
  color: var(--purple-deep);
  font-size: 20px;
  font-weight: 900;
}

.app-band .pikogo-logo-lockup {
  justify-content: center;
}

.app-band .pikogo-logo-lockup span {
  color: #fff;
}

.app-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.app-card {
  padding: 22px;
  min-height: 150px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.app-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.app-card p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 15px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: start;
}

.contact-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(116, 64, 184, 0.12);
}

.contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-list span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.contact-list strong,
.contact-list a {
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
}

.poster {
  width: min(520px, 100%);
  margin-left: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.page-hero {
  padding: 142px clamp(20px, 5vw, 72px) 58px;
  background:
    linear-gradient(90deg, rgba(255, 250, 246, 0.96), rgba(255, 250, 246, 0.72)),
    url("assets/back-to-school.jpg") center / cover no-repeat;
}

.page-hero .section-inner {
  margin: 0;
}

.page-hero h1 {
  max-width: 760px;
  font-size: clamp(36px, 6vw, 62px);
}

.content-page {
  background: #fff;
}

.content-body {
  width: min(880px, 100%);
  margin: 0 auto;
  font-size: 16px;
}

.content-body h2 {
  margin-top: 42px;
  margin-bottom: 12px;
  font-size: 26px;
}

.content-body h2:first-child {
  margin-top: 0;
}

.content-body p,
.content-body li {
  color: #4d4656;
}

.content-body ul {
  padding-left: 1.2em;
}

.notice {
  padding: 18px 20px;
  margin: 22px 0;
  background: #fff7d9;
  border: 1px solid rgba(247, 185, 40, 0.36);
  border-radius: 8px;
}

.site-footer {
  padding: 34px clamp(20px, 5vw, 72px);
  color: #fff;
  background: #251b3b;
}

.footer-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-weight: 700;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.78);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #fff;
}

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

  .feature-grid,
  .app-panel,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .photo-stack {
    max-width: 620px;
  }

  .poster {
    margin: 0;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: sticky;
  }

  .brand-title {
    font-size: 16px;
  }

  .hero {
    min-height: 78vh;
    padding-top: 72px;
    background: var(--paper);
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(255, 250, 246, 0.96) 0%, rgba(255, 250, 246, 0.84) 46%, rgba(255, 250, 246, 0.38) 100%),
      url("assets/taotao-campus.jpg") center / cover no-repeat;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .pikogo-logo-lockup {
    gap: 10px;
    margin-bottom: 14px;
  }

  .pikogo-logo-lockup img {
    width: 64px;
    height: 64px;
    flex-basis: 64px;
    border-radius: 18px;
  }

  .pikogo-logo-lockup span {
    font-size: 18px;
  }

  .photo-stack {
    grid-template-columns: 1fr;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}