/* 知几公开合规页 · 以「知微轨迹」组织长内容，保持阅读优先。 */
.legal-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 9% 12%, rgba(158, 223, 242, 0.2), transparent 28rem),
    radial-gradient(circle at 92% 32%, rgba(232, 246, 241, 0.92), transparent 30rem),
    var(--background);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 12px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: #fff;
  transform: translateY(-160%);
}

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

.legal-page a:focus-visible,
.legal-page summary:focus-visible {
  outline: 3px solid rgba(90, 187, 217, 0.42);
  outline-offset: 4px;
  border-radius: 6px;
}

.legal-nav { border-bottom-color: rgba(221, 232, 232, 0.9); }
.legal-nav .nav-inner { max-width: 1180px; }

.legal-nav-links {
  display: none;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  color: var(--ink-soft);
  font-size: 13.5px;
}

.legal-nav-links a { transition: color 0.2s ease; }
.legal-nav-links a:hover,
.legal-nav-links a[aria-current="page"] { color: var(--ink); }
.legal-nav .btn { margin-left: auto; }

.legal-main { padding-top: var(--nav-h); }

.legal-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(221, 232, 232, 0.88);
}

.legal-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(23, 38, 41, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 38, 41, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 90%);
  mask-image: linear-gradient(to bottom, #000, transparent 90%);
}

.legal-hero-inner {
  position: relative;
  max-width: 940px;
  margin: 0 auto;
  padding: 76px 24px 64px;
}

.legal-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--mint);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.legal-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.legal-hero h1 {
  max-width: 780px;
  margin-top: 20px;
  font-family: var(--font-serif);
  font-size: clamp(34px, 7vw, 58px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.015em;
}

.legal-lede {
  max-width: 730px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.9;
}

.legal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 26px;
  color: var(--ink-faint);
  font-size: 12.5px;
}

.legal-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 1180px;
  margin: 0 auto;
  padding: 38px 24px 96px;
}

.legal-toc {
  margin-bottom: 36px;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.74);
}

.legal-toc-label {
  margin-bottom: 12px;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.legal-toc nav {
  display: flex;
  gap: 9px;
  overflow-x: auto;
  padding-bottom: 3px;
  scrollbar-width: thin;
}

.legal-toc a {
  flex: 0 0 auto;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-size: 12.5px;
  white-space: nowrap;
}

.legal-toc a:hover { background: var(--mint-soft); color: var(--ink); }

.legal-document {
  position: relative;
  min-width: 0;
  padding-left: 29px;
}

.legal-document::before {
  content: "";
  position: absolute;
  top: 13px;
  bottom: 30px;
  left: 6px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent-strong), var(--mint), rgba(97, 181, 158, 0.08));
}

.legal-section {
  position: relative;
  scroll-margin-top: calc(var(--nav-h) + 24px);
  padding: 0 0 48px;
}

.legal-section::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -29px;
  width: 11px;
  height: 11px;
  border: 3px solid var(--background);
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 1px rgba(97, 181, 158, 0.52);
}

.legal-section h2 {
  font-family: var(--font-serif);
  font-size: clamp(23px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.35;
}

.legal-section h3 {
  margin-top: 26px;
  font-size: 16px;
  line-height: 1.55;
}

.legal-section p,
.legal-section li {
  color: #425659;
  font-size: 14.5px;
  line-height: 1.9;
}

.legal-section p { margin-top: 14px; }
.legal-section ul,
.legal-section ol { margin: 12px 0 0 1.2em; }
.legal-section li + li { margin-top: 7px; }
.legal-section strong { color: var(--ink); }
.legal-section a { color: #2788a7; text-decoration: underline; text-underline-offset: 3px; }

.legal-note {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 3px solid var(--mint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(232, 246, 241, 0.72);
}

.legal-note p { margin-top: 0; }
.legal-note-warning { border-left-color: #e69a6e; background: rgba(241, 160, 113, 0.1); }

.legal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 22px;
}

.legal-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
}

.legal-card h3 { margin-top: 0; font-size: 15.5px; }
.legal-card p { margin-top: 7px; font-size: 13.5px; }

.legal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 22px;
}

.legal-actions .btn { min-height: 44px; padding: 0 20px; font-size: 13.5px; text-decoration: none; }

.support-faq { margin-top: 20px; border-top: 1px solid var(--line); }
.support-faq details { border-bottom: 1px solid var(--line); }
.support-faq summary {
  position: relative;
  padding: 18px 34px 18px 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.support-faq summary::-webkit-details-marker { display: none; }
.support-faq summary::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 4px;
  color: var(--mint);
  font-size: 20px;
  font-weight: 400;
}
.support-faq details[open] summary::after { content: "−"; }
.support-faq details p { margin: -4px 28px 18px 0; }

.deletion-steps { counter-reset: deletion-step; list-style: none; margin-left: 0 !important; }
.deletion-steps li {
  position: relative;
  min-height: 46px;
  padding: 0 0 18px 46px;
  counter-increment: deletion-step;
}
.deletion-steps li::before {
  content: counter(deletion-step, decimal-leading-zero);
  position: absolute;
  top: 1px;
  left: 0;
  color: var(--mint);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
}

.legal-page .footer { background: rgba(255, 255, 255, 0.48); }
.legal-page .footer-inner { padding-top: 44px; }

@media (min-width: 720px) {
  .legal-nav-links { display: flex; }
  .legal-nav .btn { margin-left: 2px; }
  .legal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .legal-hero-inner { padding-top: 94px; padding-bottom: 78px; }
}

@media (min-width: 940px) {
  .legal-layout { grid-template-columns: 218px minmax(0, 760px); justify-content: space-between; gap: 64px; padding-top: 64px; }
  .legal-toc { position: sticky; top: calc(var(--nav-h) + 28px); align-self: start; margin-bottom: 0; padding: 0; border: 0; border-radius: 0; background: transparent; }
  .legal-toc nav { flex-direction: column; gap: 3px; overflow: visible; }
  .legal-toc a { padding: 8px 11px; background: transparent; white-space: normal; }
  .legal-toc a:hover { transform: translateX(3px); }
  .legal-document { padding-left: 36px; }
  .legal-document::before { left: 6px; }
  .legal-section::before { left: -36px; }
}

@media (max-width: 460px) {
  .legal-nav .nav-en { display: none; }
  .legal-nav .btn { min-height: 36px; padding: 0 14px; font-size: 12.5px; }
  .legal-hero-inner { padding: 58px 20px 48px; }
  .legal-layout { padding-right: 20px; padding-left: 20px; }
  .legal-section p,
  .legal-section li { font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .legal-nav-links a,
  .legal-toc a { transition: none; }
}