.support-center {
  --support-bg: linear-gradient(180deg, #f6f8fb 0%, #ffffff 28%, #f2f6f8 100%);
  --support-paper: #ffffff;
  --support-soft: #eef4f7;
  --support-ink: #162235;
  --support-muted: #526173;
  --support-line: rgba(22, 34, 53, 0.12);
  --support-blue: #12304a;
  --support-accent: #2563eb;
  --support-teal: #0f766e;
  --support-shadow: rgba(22, 34, 53, 0.1) 0 20px 44px -32px;
  background: var(--support-bg);
  color: var(--support-ink);
  padding-bottom: 64px;
}

.support-shell {
  width: min(1040px, calc(100% - 48px));
  margin: 0 auto;
}

.support-hero {
  padding: 72px 0 32px;
}

.support-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin: 0 auto 24px;
}

.support-topline strong {
  color: #111827;
  font-size: 31px;
  line-height: 1;
  font-weight: 850;
}

.support-topline div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.support-topline span,
.support-topline a {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid rgba(30, 42, 56, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: #111827;
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.support-hero h1 {
  max-width: 820px;
  margin: 0 0 18px;
  color: var(--support-ink);
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.06;
  font-weight: 820;
  letter-spacing: 0;
  text-wrap: balance;
}

.support-hero p {
  max-width: 760px;
  margin: 0;
  color: var(--support-muted);
  font-size: 18px;
  line-height: 1.72;
}

.support-search {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  width: min(880px, 100%);
  min-height: 62px;
  margin-top: 30px;
  padding: 0 0 12px;
  border: 0;
  border-bottom: 1.5px solid var(--support-blue);
  background: transparent;
}

.support-search svg {
  width: 22px;
  height: 22px;
  margin-left: 2px;
  color: var(--support-blue);
}

.support-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: #111827;
  background: transparent;
  font: 700 18px/1.35 inherit;
}

.support-search input::placeholder {
  color: #7a838d;
  font-weight: 650;
}

.support-search button,
.support-chat-form button,
.support-email-form button {
  min-height: 48px;
  border: 0;
  border-radius: 10px;
  background: var(--support-blue);
  color: #ffffff;
  font: 900 14px/1 inherit;
  cursor: pointer;
  padding: 0 18px;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.support-search button:hover,
.support-chat-form button:hover,
.support-email-form button:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: rgba(30, 42, 56, 0.16) 0 18px 34px -24px;
}

.support-search button:focus-visible,
.support-chat-form button:focus-visible,
.support-email-form button:focus-visible,
.support-intent-button:focus-visible,
.support-chip-row button:focus-visible,
.support-category-card:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.28);
  outline-offset: 2px;
}

.support-hero-guide {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  width: min(960px, 100%);
  margin-top: 24px;
}

.support-hero-note {
  padding: 18px 18px 16px;
  border: 1px solid var(--support-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--support-shadow);
}

.support-hero-note strong {
  display: block;
  margin-bottom: 7px;
  color: var(--support-ink);
  font-size: 15px;
  line-height: 1.4;
}

.support-hero-note span {
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.62;
}

.support-section {
  padding: 30px 0;
}

.support-section-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 18px;
}

.support-section-head h2 {
  margin: 0;
  color: var(--support-ink);
  font-size: 30px;
  line-height: 1.22;
  letter-spacing: 0;
}

.support-section-head p,
.support-api-status {
  margin: 0;
  color: var(--support-muted);
  font-size: 14px;
  line-height: 1.62;
}

.support-api-status {
  padding: 7px 11px;
  border: 1px solid var(--support-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  font-weight: 800;
}

.support-category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 18px 0 10px;
}

.support-category-card {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 4px;
  min-height: 108px;
  padding: 18px;
  border: 1px solid rgba(22, 34, 53, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--support-shadow);
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.support-category-card:hover,
.support-category-card.is-active {
  transform: translateY(-1px);
  border-color: rgba(37, 99, 235, 0.28);
  background: #ffffff;
}

.support-category-icon {
  display: grid;
  place-items: center;
  grid-row: 1 / span 2;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: var(--support-blue);
  color: #ffffff;
  font-size: 19px;
  font-weight: 850;
}

.support-category-card strong {
  color: #111827;
  font-size: 16px;
  line-height: 1.35;
}

.support-category-card span {
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.58;
}

.support-chat-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.38fr) minmax(0, 0.62fr);
  gap: 18px;
  align-items: stretch;
}

.support-faq-panel,
.support-chat-panel {
  border: 1px solid var(--support-line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--support-shadow);
}

.support-faq-panel {
  padding: 22px;
}

.support-faq-panel h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
}

.support-faq-list {
  display: grid;
  gap: 0;
  margin-top: 16px;
}

.support-faq-item {
  display: grid;
  gap: 7px;
  padding: 14px 2px;
  border: 0;
  border-top: 1px solid rgba(22, 34, 53, 0.1);
  border-radius: 0;
  background: transparent;
}

.support-faq-item[hidden],
.support-category-card[hidden] {
  display: none;
}

.support-faq-item strong {
  color: var(--support-ink);
  font-size: 14px;
  line-height: 1.45;
}

.support-faq-item span {
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.6;
}

.support-chat-panel {
  min-height: 700px;
  display: grid;
  grid-template-rows: auto minmax(260px, 1fr) auto;
  overflow: hidden;
}

.support-chat-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 22px;
  border-bottom: 1px solid var(--support-line);
  background: linear-gradient(135deg, #ffffff 0%, #f6f8fb 62%, rgba(37, 99, 235, 0.08) 100%);
}

.support-chat-brand {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.support-chat-brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: rgba(22, 34, 53, 0.16) 0 14px 28px -20px;
}

.support-chat-brand strong {
  display: block;
  color: var(--support-ink);
  font-size: 18px;
  line-height: 1.3;
}

.support-chat-brand span,
.support-chat-safety {
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.56;
}

.support-chat-safety {
  max-width: 260px;
  text-align: right;
  font-weight: 750;
}

.support-chat-messages {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 22px;
  overflow: auto;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fb 100%);
}

.support-message {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: end;
  max-width: 88%;
}

.support-message.is-user {
  grid-template-columns: minmax(0, 1fr);
  justify-self: end;
  max-width: 82%;
}

.support-message-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(22, 34, 53, 0.12);
  border-radius: 8px;
  background: #eef4f7;
  overflow: hidden;
}

.support-message-mark img {
  width: 32px;
  height: 32px;
}

.support-bubble {
  padding: 13px 15px;
  border: 1px solid rgba(22, 34, 53, 0.1);
  border-radius: 14px 14px 14px 4px;
  background: #ffffff;
  color: var(--support-ink);
  font-size: 14px;
  line-height: 1.68;
  white-space: pre-wrap;
}

.support-message.is-user .support-bubble {
  border-color: var(--support-blue);
  border-radius: 14px 14px 4px 14px;
  background: var(--support-blue);
  color: #ffffff;
}

.support-chat-compose {
  display: grid;
  gap: 14px;
  padding: 18px 22px 22px;
  border-top: 1px solid var(--support-line);
  background: #ffffff;
}

.support-intent-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.support-intent-button {
  min-height: 38px;
  border: 1px solid rgba(30, 42, 56, 0.12);
  border-radius: 999px;
  background: #eef4f7;
  color: var(--support-ink);
  font: 850 12px/1 inherit;
  cursor: pointer;
  padding: 0 14px;
}

.support-intent-button.is-active {
  border-color: rgba(37, 99, 235, 0.3);
  background: var(--support-blue);
  color: #ffffff;
}

.support-intent-summary,
.support-privacy-note {
  margin: 0;
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.58;
}

.support-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.support-chip-row button {
  min-height: 34px;
  border: 1px solid rgba(37, 99, 235, 0.22);
  border-radius: 999px;
  background: #eef4f7;
  color: var(--support-ink);
  font: 850 12px/1 inherit;
  cursor: pointer;
  padding: 0 12px;
}

.support-chip-row button:hover {
  background: rgba(37, 99, 235, 0.1);
}

.support-chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.support-chat-form textarea,
.support-email-form input {
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(22, 34, 53, 0.14);
  border-radius: 10px;
  background: #ffffff;
  color: var(--support-ink);
  font: 700 14px/1.5 inherit;
}

.support-chat-form textarea {
  min-height: 64px;
  max-height: 160px;
  padding: 14px 16px;
  resize: vertical;
}

.support-email-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 12px;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: 10px;
  background: rgba(15, 118, 110, 0.07);
}

.support-email-form input {
  min-height: 48px;
  padding: 0 14px;
}

.support-status {
  min-height: 18px;
  margin: 0;
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.5;
}

.support-status[data-state="error"] {
  color: #a14f4a;
}

.support-status[data-state="warning"] {
  color: #8c6b2b;
}

.support-status[data-state="ok"] {
  color: var(--support-teal);
}

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

.support-trust-card {
  padding: 20px;
  border: 1px solid var(--support-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--support-shadow);
}

.support-trust-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--support-ink);
}

.support-trust-card span {
  color: var(--support-muted);
  font-size: 13px;
  line-height: 1.6;
}

.support-policy-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.support-policy-links a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid rgba(22, 34, 53, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--support-ink);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

#support-chat {
  scroll-margin-top: 28px;
}

@media (max-width: 1120px) {
  .support-category-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .support-hero-guide,
  .support-category-grid,
  .support-chat-shell,
  .support-trust-row {
    grid-template-columns: 1fr;
  }

  .support-chat-safety {
    max-width: none;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .support-center {
    padding-bottom: 40px;
  }

  .support-shell {
    width: min(100% - 28px, 1120px);
  }

  .support-hero {
    padding: 34px 0 20px;
  }

  .support-topline {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 18px;
  }

  .support-topline strong {
    font-size: 24px;
  }

  .support-hero h1 {
    font-size: 34px;
  }

  .support-hero p {
    font-size: 16px;
  }

  .support-search,
  .support-chat-form,
  .support-email-form {
    grid-template-columns: 1fr;
  }

  .support-search {
    margin-top: 22px;
  }

  .support-search svg {
    display: none;
  }

  .support-section {
    padding: 22px 0;
  }

  .support-section-head,
  .support-chat-head {
    align-items: stretch;
    flex-direction: column;
  }

  .support-chat-panel {
    min-height: 620px;
  }

  .support-chat-compose,
  .support-chat-head,
  .support-faq-panel {
    padding-left: 16px;
    padding-right: 16px;
  }

  .support-chat-messages {
    padding: 16px;
  }

  .support-message,
  .support-message.is-user {
    max-width: 100%;
  }

  .support-intent-row,
  .support-chip-row,
  .support-policy-links {
    gap: 8px;
  }
}