/* ---------- tutorial ---------- */
.guide-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.toc-card {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-title {
  font-size: 11.5px;
  font-weight: 800;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.toc-card nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-card nav a {
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #3E3850;
  transition: .2s;
}

.toc-card nav a:hover,
.toc-card nav a.is-active {
  background: var(--brand-l);
  color: var(--brand-d);
  font-weight: 700;
}

.toc-card .btn {
  margin-top: 6px;
}

.guide-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.guide-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px;
}

.guide-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.guide-num {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 13px;
  background: var(--brand-l);
  color: var(--brand-d);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 900;
  font-family: ui-monospace, Consolas, monospace;
}

.guide-head h2 {
  font-size: 22px;
  margin: 0 0 4px;
}

.guide-head p {
  margin: 0;
  font-size: 13.5px;
  color: var(--sub);
}

.guide-list {
  padding: 0;
  list-style: none;
  counter-reset: g;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guide-list li {
  counter-increment: g;
  position: relative;
  padding-left: 34px;
  font-size: 13.5px;
  color: var(--sub);
  line-height: 1.75;
}

.guide-list li::before {
  content: counter(g);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brand-l);
  color: var(--brand-d);
  font-size: 11px;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.guide-list li b {
  display: block;
  color: var(--ink);
  font-size: 14px;
}

.tip-box {
  margin-top: 18px;
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-left: 4px solid var(--brand);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 12.5px;
  color: var(--sub);
}

.tip-box b {
  display: block;
  color: var(--ink);
  font-size: 13px;
  margin-bottom: 3px;
}

.tip-box p {
  margin: 0;
}

.split-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.mini-card {
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-radius: 12px;
  padding: 16px 18px;
}

.mini-card h4 {
  margin: 0 0 8px;
  font-size: 14px;
}

.mini-card ul {
  margin: 0;
  padding-left: 17px;
  font-size: 12.5px;
  color: var(--sub);
  line-height: 1.8;
}

.mini-card li b {
  color: var(--ink);
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding: 11px 12px 11px 36px;
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-radius: 10px;
  font-size: 12.5px;
  color: #3E3850;
  line-height: 1.6;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 12px;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  display: grid;
  place-items: center;
}

.compat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px;
}

.compat-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.compat-head h2 {
  font-size: 22px;
  margin: 6px 0 4px;
}

.compat-head p {
  margin: 0;
  font-size: 12.5px;
  color: var(--sub);
  max-width: 560px;
}

.search-field {
  min-width: 220px;
}

.search-field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 13px;
  font-size: 13px;
  outline: none;
  transition: .2s;
  background: #FAF8FE;
}

.search-field input:focus {
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(104, 64, 200, .10);
}

.compat-table b {
  font-size: 13px;
}

.protocol-tag {
  display: inline-block;
  background: var(--brand-l);
  color: var(--brand-d);
  font-size: 11px;
  font-weight: 800;
  border-radius: 5px;
  padding: 2px 6px;
  white-space: nowrap;
}

.muted-cell {
  color: var(--muted);
  font-size: 12px;
}

.compat-note {
  margin: 12px 0 0;
  font-size: 11.5px;
  color: var(--muted);
}

.compat-table tr.is-hidden {
  display: none;
}

/* ---------- contact ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.contact-section {
  padding-top: 30px;
}

/* 联系页：分组列表风格，贴近微信 / QQ 原生列表质感 */
.contact-board {
  max-width: 720px;
  margin: 0 auto;
  padding: 0;
  border-color: rgba(104, 64, 200, .09);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(23, 19, 38, .04), 0 14px 34px rgba(23, 19, 38, .05);
}

.contact-board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px 16px;
  border-bottom: 1px solid #F1EEF8;
}

.contact-board-head h2 {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.3;
}

.contact-hours {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-size: 12.5px;
  color: var(--sub);
  white-space: nowrap;
}

.contact-hours span {
  flex: none;
  color: #9A93AB;
  font-size: 11.5px;
}

.contact-board-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 208px;
  gap: 0;
  align-items: stretch;
}

.contact-board-grid.is-single {
  grid-template-columns: minmax(0, 1fr);
}

.contact-info-grid {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 6px 10px;
  align-content: stretch;
}

.contact-tile {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  min-width: 0;
  padding: 13px 12px;
  font: inherit;
  color: inherit;
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color .16s ease;
}

.contact-tile:hover,
.contact-tile:focus-visible {
  background: #F7F4FB;
  outline: none;
}

.contact-tile:active {
  background: #EFEBF9;
}

.contact-tile + .contact-tile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 61px;
  right: 12px;
  height: 1px;
  background: #F1EEF8;
}

.contact-tile-icon {
  display: grid;
  flex: none;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: linear-gradient(160deg, #F7F3FF 0%, #ECE3FB 100%);
  box-shadow: inset 0 0 0 1px rgba(104, 64, 200, .07);
  color: var(--brand);
}

.contact-tile-icon svg {
  width: 19px;
  height: 19px;
}

.contact-tile-text {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.contact-tile-label {
  font-size: 12.5px;
  font-weight: 500;
  color: #8F88A1;
  letter-spacing: 0;
}

.contact-tile-label::before {
  content: none;
}

.contact-tile-value {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  color: #191622;
  overflow-wrap: anywhere;
}

.contact-tile-action {
  flex: none;
  padding: 5px 11px;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--brand);
  background: #fff;
  border: 1px solid rgba(104, 64, 200, .18);
  border-radius: 999px;
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}

.contact-tile:hover .contact-tile-action,
.contact-tile:focus-visible .contact-tile-action {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
}

.contact-tile-action.is-done,
.contact-tile:hover .contact-tile-action.is-done {
  color: #15803D;
  background: #EAF7EF;
  border-color: rgba(21, 128, 61, .18);
}

.contact-qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-width: 0;
  margin: 0;
  padding: 16px 16px 18px;
  text-align: center;
  border-left: 1px solid #F1EEF8;
}

.contact-qr-card img {
  width: 160px;
  height: 160px;
  max-width: 100%;
  object-fit: contain;
  border: 1px solid #F1EEF8;
  border-radius: 12px;
  background: #fff;
}

.contact-qr-card figcaption {
  font-size: 11.5px;
  color: #8F88A1;
}

.contact-board-grid.is-single .contact-qr-card {
  width: 100%;
  max-width: 280px;
  justify-self: center;
  border-left: 0;
}

.contact-board-empty {
  margin: 0;
  padding: 46px 22px;
  font-size: 13px;
  color: var(--sub);
  text-align: center;
}

.contact-board-foot {
  display: flex;
  padding: 12px 22px 18px;
  border-top: 1px solid #F1EEF8;
}

.contact-board-foot .contact-tutorial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 46px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #7448D6 0%, #5A32B8 100%);
  border: 0;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(104, 64, 200, .22);
  transition: filter .16s ease, transform .12s ease, box-shadow .16s ease;
}

.contact-board-foot .contact-tutorial:hover {
  filter: brightness(1.06);
}

.contact-board-foot .contact-tutorial:active {
  transform: translateY(1px);
  box-shadow: 0 4px 12px rgba(104, 64, 200, .2);
}

/* ---------- legal ---------- */
.legal-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.legal-aside {
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.legal-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 34px 38px;
  font-size: 14px;
  color: #3E3850;
  min-width: 0;
}

.legal-card section + section {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid #F0F3F8;
}

.legal-card h2 {
  font-size: 19px;
  margin: 0 0 8px;
}

.legal-card p {
  margin: 0 0 10px;
  color: #4A5568;
}

.legal-card p:last-child {
  margin-bottom: 0;
}

.legal-card ul {
  margin: 0 0 10px;
  padding-left: 20px;
  color: #4A5568;
}

.legal-card li {
  margin: 4px 0;
}

.legal-card a {
  color: var(--brand-d);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-card b {
  color: var(--ink);
}

/* ---------- error ---------- */
.error-page {
  padding: 70px 0 80px;
  text-align: center;
}

.error-inner {
  max-width: 620px;
}

.error-code {
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -4px;
  color: #EDE6FB;
  margin-bottom: 8px;
  font-family: ui-monospace, Consolas, monospace;
}

.error-page h1 {
  font-size: 36px;
  margin: 4px 0 10px;
}

.error-page .lede {
  margin-left: auto;
  margin-right: auto;
  max-width: 520px;
}

.error-page .cta-row {
  justify-content: center;
  margin-top: 22px;
}

.error-links {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 22px;
  font-size: 12.5px;
  color: var(--muted);
}

.error-links a:hover {
  color: var(--brand);
}