:root {
  color-scheme: light;
  --legal-bg: #f4f7f6;
  --legal-surface: rgba(255, 255, 255, 0.82);
  --legal-ink: #122023;
  --legal-muted: #657276;
  --legal-line: rgba(18, 32, 35, 0.12);
  --legal-accent: #168f87;
  --legal-accent-soft: #dff4f0;
  --legal-shadow: 0 24px 80px rgba(29, 47, 48, 0.1);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --legal-bg: #0f1618;
  --legal-surface: rgba(25, 35, 38, 0.88);
  --legal-ink: #eef6f4;
  --legal-muted: #9badaa;
  --legal-line: rgba(218, 239, 233, 0.12);
  --legal-accent: #55d2c4;
  --legal-accent-soft: rgba(50, 160, 148, 0.17);
  --legal-shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 4% 4%, rgba(80, 202, 187, 0.14), transparent 28%),
    radial-gradient(circle at 96% 54%, rgba(231, 187, 104, 0.1), transparent 32%),
    var(--legal-bg);
  color: var(--legal-ink);
  min-height: 100vh;
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

.legal-header {
  width: min(1440px, calc(100% - 48px));
  min-height: 84px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--legal-line);
}

.legal-brand,
.legal-actions,
.legal-return,
.legal-nav {
  display: flex;
  align-items: center;
}

.legal-brand {
  width: fit-content;
  gap: 11px;
  color: var(--legal-ink);
  text-decoration: none;
}

.legal-brand-mark {
  width: 42px;
  height: 42px;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(22, 143, 135, 0.2);
}

.legal-brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.legal-brand strong,
.legal-brand small {
  display: block;
}

.legal-brand strong {
  font-size: 15px;
  letter-spacing: 0.02em;
}

.legal-brand small {
  margin-top: 2px;
  color: var(--legal-muted);
  font-size: 10px;
}

.legal-nav {
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--legal-line);
  border-radius: 999px;
  background: var(--legal-surface);
  box-shadow: 0 10px 34px rgba(28, 50, 52, 0.06);
  backdrop-filter: blur(24px);
}

.legal-nav a {
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--legal-muted);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: 180ms ease;
}

.legal-nav a:hover,
.legal-nav a:focus-visible,
.legal-nav a.active {
  background: var(--legal-accent-soft);
  color: var(--legal-accent);
}

.legal-actions {
  justify-self: end;
  gap: 10px;
}

.legal-return {
  min-height: 24px;
  gap: 7px;
  color: var(--legal-muted);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}

.legal-return:hover,
.legal-return:focus-visible {
  color: var(--legal-accent);
}

.legal-theme-toggle {
  height: 36px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--legal-line);
  border-radius: 999px;
  background: var(--legal-surface);
  color: var(--legal-muted);
  box-shadow: 0 8px 24px rgba(28, 50, 52, 0.06);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: 180ms ease;
}

.legal-theme-toggle:hover,
.legal-theme-toggle:focus-visible {
  border-color: color-mix(in srgb, var(--legal-accent) 35%, var(--legal-line));
  background: var(--legal-accent-soft);
  color: var(--legal-accent);
  transform: translateY(-1px);
}

.legal-shell {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0 88px;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 72px;
  align-items: start;
}

.legal-rail {
  position: sticky;
  top: 36px;
  padding-top: 12px;
}

.legal-rail > span,
.legal-hero > span {
  color: var(--legal-accent);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.legal-rail > strong {
  display: block;
  margin: 14px 0 12px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  line-height: 1.15;
}

.legal-rail > p {
  margin: 0;
  color: var(--legal-muted);
  font-size: 13px;
  line-height: 1.8;
}

.legal-rail-note {
  margin-top: 28px;
  padding: 16px;
  display: flex;
  gap: 10px;
  border: 1px solid var(--legal-line);
  border-radius: 16px;
  background: var(--legal-surface);
  color: var(--legal-muted);
  font-size: 11px;
  line-height: 1.7;
}

.legal-rail-note i {
  color: var(--legal-accent);
  font-size: 18px;
}

.legal-document {
  min-width: 0;
}

.legal-hero {
  max-width: 820px;
  margin-bottom: 38px;
}

.legal-hero h1 {
  margin: 15px 0 18px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(44px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.legal-hero p {
  max-width: 680px;
  margin: 0;
  color: var(--legal-muted);
  font-size: 16px;
  line-height: 1.9;
}

.legal-highlight {
  margin-bottom: 32px;
  padding: 24px 26px;
  border: 1px solid color-mix(in srgb, var(--legal-accent) 24%, var(--legal-line));
  border-radius: 22px;
  background:
    linear-gradient(135deg, var(--legal-accent-soft), transparent 70%),
    var(--legal-surface);
  box-shadow: var(--legal-shadow);
}

.legal-highlight strong {
  color: var(--legal-accent);
  font-size: 12px;
}

.legal-highlight p {
  margin: 9px 0 0;
  color: var(--legal-muted);
  font-size: 13px;
  line-height: 1.85;
}

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

.legal-copy > section {
  padding: 34px 0;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 22px;
  border-bottom: 1px solid var(--legal-line);
}

.legal-copy > section > span {
  color: var(--legal-accent);
  font-family: Georgia, serif;
  font-size: 12px;
  font-style: italic;
}

.legal-copy h2 {
  margin: -5px 0 14px;
  font-size: 21px;
  letter-spacing: -0.02em;
}

.legal-copy p,
.legal-copy li {
  color: var(--legal-muted);
  font-size: 14px;
  line-height: 1.95;
}

.legal-copy p,
.legal-copy ul {
  margin: 0;
}

.legal-copy ul {
  padding-left: 1.2em;
}

.legal-copy li + li {
  margin-top: 8px;
}

.legal-copy a {
  color: var(--legal-accent);
  font-weight: 700;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(230px, 0.72fr) minmax(360px, 1.28fr);
  gap: 22px;
}

.contact-intro,
.contact-form {
  border: 1px solid var(--legal-line);
  border-radius: 26px;
  background: var(--legal-surface);
  box-shadow: var(--legal-shadow);
}

.contact-intro {
  padding: 32px;
  background:
    radial-gradient(circle at 86% 10%, rgba(85, 210, 196, 0.22), transparent 30%),
    #102126;
  color: #eff8f6;
}

.contact-orbit {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  color: #55d2c4;
  font-size: 24px;
}

.contact-intro h2 {
  margin: 30px 0 13px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 28px;
  line-height: 1.25;
}

.contact-intro > p {
  margin: 0;
  color: rgba(236, 248, 245, 0.68);
  font-size: 13px;
  line-height: 1.9;
}

.contact-intro dl {
  margin: 36px 0 0;
}

.contact-intro dl div {
  padding: 12px 0;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
}

.contact-intro dt {
  color: rgba(236, 248, 245, 0.54);
}

.contact-intro dd {
  margin: 0;
  text-align: right;
}

.contact-form {
  padding: 32px;
}

.contact-form > label:not(.contact-consent) {
  display: block;
  margin-bottom: 20px;
}

.contact-form label > span {
  display: block;
  margin-bottom: 8px;
  color: var(--legal-muted);
  font-size: 11px;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--legal-line);
  border-radius: 13px;
  outline: none;
  background: color-mix(in srgb, var(--legal-surface) 82%, var(--legal-bg));
  color: var(--legal-ink);
  transition: 180ms ease;
}

.contact-form input,
.contact-form select {
  height: 46px;
  padding: 0 14px;
}

.contact-form textarea {
  min-height: 154px;
  padding: 13px 14px;
  resize: vertical;
  line-height: 1.7;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--legal-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--legal-accent) 13%, transparent);
}

.contact-form label > small {
  display: block;
  margin-top: 6px;
  color: var(--legal-muted);
  font-size: 10px;
  text-align: right;
}

.contact-consent {
  margin: 3px 0 20px;
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 9px;
  align-items: start;
}

.contact-consent input {
  width: 16px;
  height: 16px;
  margin: 1px 0 0;
}

.contact-consent span {
  margin: 0 !important;
  font-weight: 500 !important;
  line-height: 1.65;
}

.contact-consent a {
  color: var(--legal-accent);
  font-weight: 700;
}

.contact-form button {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 14px;
  background: var(--legal-accent);
  color: #fff;
  cursor: pointer;
  font-weight: 800;
  box-shadow: 0 14px 30px color-mix(in srgb, var(--legal-accent) 28%, transparent);
}

.contact-form button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.contact-result {
  min-height: 0;
  margin-top: 16px;
  color: var(--legal-muted);
  font-size: 12px;
  line-height: 1.6;
}

.contact-result.success,
.contact-result.error {
  padding: 13px 15px;
  border-radius: 13px;
}

.contact-result.success {
  background: var(--legal-accent-soft);
  color: var(--legal-accent);
}

.contact-result.error {
  background: rgba(208, 65, 65, 0.1);
  color: #c84444;
}

.contact-result strong,
.contact-result span {
  display: block;
}

.legal-footer {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
  padding: 26px 0 38px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--legal-line);
  color: var(--legal-muted);
  font-size: 11px;
}

.legal-footer nav {
  display: flex;
  gap: 18px;
}

.legal-footer a {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.legal-footer a:hover,
.legal-footer a:focus-visible {
  color: var(--legal-accent);
}

@media (max-width: 900px) {
  .legal-header {
    grid-template-columns: 1fr auto;
  }

  .legal-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: center;
    margin-bottom: 16px;
  }

  .legal-shell {
    padding-top: 46px;
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .legal-rail {
    position: static;
  }

  .legal-rail-note {
    width: fit-content;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .legal-header,
  .legal-shell,
  .legal-footer {
    width: min(100% - 28px, 1280px);
  }

  .legal-header {
    min-height: 72px;
    gap: 14px;
  }

  .legal-brand small,
  .legal-return span,
  .legal-theme-toggle span {
    display: none;
  }

  .legal-return {
    width: 44px;
    height: 44px;
    justify-content: center;
  }

  .legal-theme-toggle {
    width: 44px;
    height: 44px;
    padding: 0;
  }

  .legal-nav {
    width: 100%;
    justify-content: stretch;
  }

  .legal-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding-inline: 8px;
    text-align: center;
  }

  .legal-shell {
    padding: 38px 0 62px;
  }

  .legal-hero h1 {
    font-size: 46px;
  }

  .legal-copy > section {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
  }

  .contact-intro,
  .contact-form {
    padding: 24px;
    border-radius: 20px;
  }

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

  .legal-footer a {
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .legal-document:not([hidden]) .legal-hero,
  .legal-document:not([hidden]) .legal-highlight,
  .legal-document:not([hidden]) .legal-copy > section,
  .legal-document:not([hidden]) .contact-grid {
    animation: legal-reveal 480ms cubic-bezier(0.22, 1, 0.36, 1) both;
  }

  .legal-document:not([hidden]) .legal-highlight { animation-delay: 70ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(1) { animation-delay: 100ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(2) { animation-delay: 130ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(3) { animation-delay: 160ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(4) { animation-delay: 190ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(5) { animation-delay: 220ms; }
  .legal-document:not([hidden]) .legal-copy > section:nth-child(6) { animation-delay: 250ms; }

  @keyframes legal-reveal {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
  }
}