:root {
  color-scheme: dark;
  --support-ink: #21182e;
  --support-paper: #fff9f4;
  --support-paper-soft: #f6e9e1;
  --support-white: #fffdfb;
  --support-muted: #d9cddd;
  --support-gold: #ffd37e;
  --support-rose: #ff8fa8;
  --support-rose-deep: #cb416c;
  --support-lavender: #c7b8ff;
  --support-mint: #9ee6ce;
  --support-glass: rgba(40, 29, 55, 0.82);
  --support-glass-soft: rgba(255, 255, 255, 0.09);
  --support-line: rgba(255, 255, 255, 0.19);
  --support-shadow: 0 24px 70px rgba(12, 7, 24, 0.35);
  --support-radius-lg: 32px;
  --support-radius-md: 22px;
  --support-radius-sm: 15px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--support-white);
  background:
    linear-gradient(180deg, rgba(19, 13, 33, 0.45), rgba(27, 19, 39, 0.95) 44%, #1b1427 100%),
    url("backgrounds/cat-universe-sunset-v1.jpg") center top / cover no-repeat,
    #21172e;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Noto Sans TC", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

a,
button,
input,
summary {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 11px 15px;
  border-radius: 12px;
  color: var(--support-ink);
  background: var(--support-white);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.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;
}

.support-backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.support-glow {
  position: absolute;
  width: min(42vw, 520px);
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(26px);
  opacity: 0.24;
}

.support-glow-a {
  top: -12%;
  left: -9%;
  background: var(--support-rose);
}

.support-glow-b {
  right: -12%;
  top: 28%;
  background: var(--support-lavender);
}

.support-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: min(1180px, calc(100% - 32px));
  min-height: 70px;
  margin: 16px auto 0;
  padding: 10px 14px 10px 18px;
  border: 1px solid var(--support-line);
  border-radius: 999px;
  background: rgba(35, 25, 49, 0.83);
  box-shadow: 0 18px 46px rgba(12, 7, 24, 0.24);
  backdrop-filter: blur(22px) saturate(135%);
  -webkit-backdrop-filter: blur(22px) saturate(135%);
}

.support-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  text-decoration: none;
}

.support-brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--support-ink);
  background: linear-gradient(135deg, var(--support-gold), var(--support-rose));
  box-shadow: 0 8px 22px rgba(255, 143, 168, 0.28);
}

.support-brand span:last-child {
  display: grid;
  min-width: 0;
  line-height: 1.25;
}

.support-brand strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.support-brand small {
  color: var(--support-muted);
}

.support-header nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.support-header nav a {
  min-height: 44px;
  padding: 10px 13px;
  border-radius: 999px;
  color: var(--support-muted);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.support-header nav a:hover {
  color: var(--support-white);
  background: var(--support-glass-soft);
}

main,
.support-footer {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.support-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  min-height: 660px;
  padding: clamp(76px, 11vw, 132px) 0 72px;
}

.support-eyebrow,
.support-card-kicker {
  margin: 0 0 12px;
  color: var(--support-gold);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.support-hero h1,
.support-section-heading h2,
.support-contact h2,
.support-app-hero h1 {
  margin: 0;
  letter-spacing: -0.04em;
  line-height: 1.02;
}

.support-hero h1 {
  max-width: 760px;
  font-size: clamp(3.25rem, 8vw, 7.4rem);
}

.support-hero h1 span,
.support-app-hero h1 span {
  color: var(--support-rose);
}

.support-lead {
  max-width: 720px;
  margin: 26px 0 0;
  color: var(--support-muted);
  font-size: clamp(1.02rem, 2vw, 1.2rem);
}

.support-lead strong {
  color: var(--support-white);
}

.support-actions,
.support-app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.support-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.support-button:hover {
  transform: translateY(-2px);
}

.support-button-primary {
  color: var(--support-ink);
  background: linear-gradient(135deg, var(--support-gold), var(--support-rose));
  box-shadow: 0 12px 34px rgba(255, 143, 168, 0.22);
}

.support-button-secondary {
  color: var(--support-white);
  border-color: var(--support-line);
  background: var(--support-glass-soft);
}

.support-safety {
  margin: 16px 0 0;
  color: var(--support-muted);
  font-size: 0.9rem;
}

.support-hero-card,
.support-principles article,
.support-app-card,
.support-faq-list details,
.support-contact,
.support-app-panel,
.support-app-hero-card {
  border: 1px solid var(--support-line);
  background: linear-gradient(180deg, rgba(54, 40, 70, 0.88), rgba(38, 28, 52, 0.88));
  box-shadow: var(--support-shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.support-hero-card {
  padding: 28px;
  border-radius: var(--support-radius-lg);
  transform: rotate(1.2deg);
}

.support-hero-card ol {
  display: grid;
  gap: 15px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.support-hero-card li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--support-white);
  font-weight: 750;
}

.support-hero-card li span {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--support-ink);
  background: var(--support-gold);
}

.support-hero-card p {
  margin: 0;
  color: var(--support-muted);
}

.support-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 104px;
}

.support-principles article {
  padding: 24px;
  border-radius: var(--support-radius-md);
}

.support-principles article > span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: var(--support-ink);
  background: var(--support-mint);
}

.support-principles h2 {
  margin: 16px 0 7px;
  font-size: 1.06rem;
}

.support-principles p,
.support-section-heading p,
.support-contact p,
.support-app-panel p,
.support-app-panel li {
  color: var(--support-muted);
}

.support-principles p {
  margin: 0;
}

.support-section {
  padding: 58px 0 78px;
}

.support-section-heading {
  max-width: 780px;
}

.support-section-heading h2,
.support-contact h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.support-section-heading > p:last-child {
  margin: 16px 0 0;
}

.support-search {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 720px;
  min-height: 58px;
  margin-top: 30px;
  padding: 10px 17px;
  border: 1px solid var(--support-line);
  border-radius: 18px;
  background: rgba(26, 19, 38, 0.82);
  box-shadow: 0 14px 40px rgba(12, 7, 24, 0.2);
}

.support-search > span:first-child {
  color: var(--support-gold);
  font-size: 1.35rem;
}

.support-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--support-white);
  background: transparent;
}

.support-search input::placeholder {
  color: rgba(217, 205, 221, 0.7);
}

.support-results-status {
  min-height: 26px;
  margin: 16px 0;
  color: var(--support-muted);
}

.support-app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.support-app-card {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  min-height: 152px;
  padding: 20px;
  border-radius: var(--support-radius-md);
}

.support-app-card img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  object-fit: cover;
  background: var(--support-glass-soft);
  box-shadow: 0 10px 26px rgba(12, 7, 24, 0.28);
}

.support-app-card h3 {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 1rem;
  line-height: 1.3;
}

.support-app-meta {
  margin: 5px 0 11px;
  color: var(--support-muted);
  font-size: 0.84rem;
}

.support-app-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.support-app-links a {
  color: var(--support-gold);
  font-size: 0.88rem;
  font-weight: 800;
  text-underline-offset: 3px;
}

.support-empty {
  grid-column: 1 / -1;
  padding: 34px;
  border: 1px dashed var(--support-line);
  border-radius: var(--support-radius-md);
  color: var(--support-muted);
  text-align: center;
}

.support-faq-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.support-faq-list details {
  border-radius: 18px;
  overflow: clip;
}

.support-faq-list summary {
  min-height: 58px;
  padding: 18px 52px 18px 20px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
  position: relative;
}

.support-faq-list summary::-webkit-details-marker {
  display: none;
}

.support-faq-list summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  color: var(--support-gold);
  font-size: 1.4rem;
  transform: translateY(-50%);
}

.support-faq-list details[open] summary::after {
  content: "−";
}

.support-faq-list details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--support-muted);
}

.support-faq-list details a {
  color: var(--support-gold);
  text-underline-offset: 3px;
}

.support-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin: 60px 0 88px;
  padding: clamp(26px, 5vw, 48px);
  border-radius: var(--support-radius-lg);
}

.support-contact > div {
  max-width: 760px;
}

.support-contact p:last-child {
  margin-bottom: 0;
}

.support-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding: 34px 0 max(42px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--support-line);
}

.support-footer p {
  margin: 4px 0 0;
  color: var(--support-muted);
}

.support-footer > div:last-child {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

.support-footer a {
  color: var(--support-muted);
  text-underline-offset: 3px;
}

.support-noscript {
  padding: 18px;
  border: 1px solid var(--support-line);
  border-radius: 16px;
  color: var(--support-muted);
}

/* Per-App support pages */
.support-app-main {
  padding: 74px 0 86px;
}

.support-app-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: stretch;
}

.support-app-hero-card {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: clamp(24px, 5vw, 44px);
  border-radius: var(--support-radius-lg);
}

.support-app-icon {
  width: 128px;
  height: 128px;
  border-radius: 30px;
  object-fit: cover;
  background: var(--support-glass-soft);
  box-shadow: 0 18px 42px rgba(12, 7, 24, 0.3);
}

.support-app-hero h1 {
  overflow-wrap: anywhere;
  font-size: clamp(2.4rem, 6vw, 5.6rem);
}

.support-app-intro {
  margin: 15px 0 0;
  color: var(--support-muted);
}

.support-app-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 0;
}

.support-app-facts div {
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--support-glass-soft);
}

.support-app-facts dt {
  color: var(--support-muted);
  font-size: 0.76rem;
}

.support-app-facts dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  font-weight: 800;
}

.support-app-quick {
  display: grid;
  align-content: center;
  gap: 16px;
  padding: 28px;
  border-radius: var(--support-radius-lg);
  background: linear-gradient(150deg, rgba(255, 211, 126, 0.18), rgba(255, 143, 168, 0.14));
}

.support-app-quick h2 {
  margin: 0;
  font-size: 1.5rem;
}

.support-app-quick p {
  margin: 0;
  color: var(--support-muted);
}

.support-app-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: 18px;
  margin-top: 20px;
}

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

.support-app-panel {
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--support-radius-md);
}

.support-app-panel h2 {
  margin: 0 0 12px;
  font-size: 1.35rem;
}

.support-app-panel h3 {
  margin: 22px 0 7px;
  font-size: 1rem;
}

.support-app-panel p:last-child,
.support-app-panel ul:last-child {
  margin-bottom: 0;
}

.support-app-panel a {
  color: var(--support-gold);
  font-weight: 800;
  text-underline-offset: 3px;
}

.support-app-checklist {
  padding-left: 1.2em;
}

.support-app-checklist li + li {
  margin-top: 9px;
}

.support-app-warning {
  border-color: rgba(255, 211, 126, 0.32);
  background: linear-gradient(180deg, rgba(78, 58, 68, 0.92), rgba(43, 31, 53, 0.92));
}

.support-app-mini-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

:focus-visible {
  outline: 3px solid var(--support-mint);
  outline-offset: 4px;
}

@media (max-width: 960px) {
  .support-app-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-app-hero,
  .support-app-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 16px;
  }

  .support-header {
    position: relative;
    align-items: flex-start;
    width: min(100% - 24px, 1180px);
    border-radius: 24px;
  }

  .support-header nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-header nav a {
    padding-inline: 10px;
    text-align: center;
  }

  main,
  .support-footer {
    width: min(100% - 24px, 1180px);
  }

  .support-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 74px 0 52px;
  }

  .support-hero-card {
    transform: none;
  }

  .support-principles {
    grid-template-columns: 1fr;
    margin-bottom: 58px;
  }

  .support-app-grid {
    grid-template-columns: 1fr;
  }

  .support-contact,
  .support-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .support-contact .support-button {
    width: 100%;
  }

  .support-footer > div:last-child {
    justify-content: flex-start;
  }

  .support-app-main {
    padding-top: 48px;
  }

  .support-app-hero-card {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 17px;
  }

  .support-app-icon {
    width: 88px;
    height: 88px;
    border-radius: 22px;
  }
}

@media (max-width: 520px) {
  .support-header {
    display: grid;
  }

  .support-header nav {
    width: 100%;
  }

  .support-hero h1 {
    font-size: clamp(2.8rem, 15vw, 4.4rem);
  }

  .support-actions,
  .support-app-actions {
    display: grid;
  }

  .support-button {
    width: 100%;
  }

  .support-app-card {
    grid-template-columns: 58px minmax(0, 1fr);
    padding: 17px;
  }

  .support-app-card img {
    width: 58px;
    height: 58px;
    border-radius: 15px;
  }

  .support-app-hero-card {
    grid-template-columns: 1fr;
  }

  .support-app-facts {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}