/**
 * /privacy/policy.html — 用户协议阅读页
 * 在站点既有色板上强化长文阅读与章节导航
 */
.policy-page {
  --policy-ink: #1f2430;
  --policy-muted: #5c6578;
  --policy-line: rgba(31, 36, 48, 0.08);
  --policy-surface: #fff;
  --policy-soft: #f4f6f9;
  --policy-accent: var(--primary, #ff522b);
  /* 由 JS 按真实顶栏高度写入；默认贴近移动端实测 ~43px */
  --policy-nav-h: 2.75rem;
  --policy-toc-h: 0px;
  --policy-header-h: var(--policy-nav-h);
  background:
    radial-gradient(1200px 420px at 12% -10%, rgba(255, 82, 43, 0.08), transparent 55%),
    radial-gradient(900px 380px at 92% 0%, rgba(52, 150, 142, 0.1), transparent 50%),
    var(--background-color, #f7f7fb);
}

/* 本页顶栏与首页共用 site_navbar，不再单独改写间距 */

.nice-dark-mode .policy-page {
  --policy-ink: #e8eaef;
  --policy-muted: #9aa3b5;
  --policy-line: rgba(255, 255, 255, 0.1);
  --policy-surface: var(--night-bg-dark, #1a1c22);
  --policy-soft: rgba(255, 255, 255, 0.04);
  background:
    radial-gradient(1000px 360px at 10% -8%, rgba(255, 82, 43, 0.12), transparent 55%),
    radial-gradient(800px 320px at 95% 0%, rgba(52, 150, 142, 0.12), transparent 50%),
    var(--night-bg-body, #12141a);
}

.policy-hero {
  position: relative;
  overflow: hidden;
  /* 避开 fixed 顶栏，避免标题被遮挡 */
  padding: calc(var(--policy-nav-h) + 1.15rem) 0 1.35rem;
  border-bottom: 1px solid var(--policy-line);
}

.policy-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(125deg, #1a2030 0%, #243044 48%, #1e2a28 100%),
    radial-gradient(600px 220px at 85% 20%, rgba(255, 82, 43, 0.22), transparent 60%);
  z-index: 0;
}

.policy-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.045'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

.policy-hero .container {
  position: relative;
  z-index: 1;
}

.policy-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.62);
  margin-bottom: 0.45rem;
}

.policy-hero-title {
  margin: 0;
  color: #fff;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  font-weight: 650;
  letter-spacing: 0.01em;
  line-height: 1.25;
}

.policy-hero-desc {
  margin: 0.55rem 0 0;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.9rem;
  line-height: 1.55;
}

.policy-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.policy-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.62rem;
  border-radius: 999px;
  font-size: 0.75rem;
  line-height: 1.2;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

@media (max-width: 767.98px) {
  .policy-hero {
    padding: calc(var(--policy-nav-h) + 0.7rem) 0 0.95rem;
  }
  .policy-hero-kicker {
    display: none;
  }
  .policy-hero-desc {
    display: none;
  }
  .policy-hero-title {
    font-size: 1.28rem;
  }
  .policy-chip-chapters {
    display: none;
  }
  .policy-intro > p {
    display: none;
  }
  .policy-intro {
    padding: 0.75rem 0.85rem;
    margin-bottom: 1rem;
  }
  .policy-intro h2 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
  }
  .policy-intro-meta {
    margin-top: 0.55rem;
    padding-top: 0.55rem;
    gap: 0.45rem 0.9rem;
  }
}

.policy-main {
  padding: 0.85rem 0 3rem;
}

@media (min-width: 992px) {
  .policy-main {
    padding-top: 1.75rem;
    padding-bottom: 4rem;
  }
}

.policy-layout {
  display: grid;
  gap: 1rem;
}

@media (min-width: 992px) {
  .policy-layout {
    grid-template-columns: minmax(0, 1fr) 17.5rem;
    gap: 1.5rem;
    align-items: start;
  }
}

.policy-panel {
  background: var(--policy-surface);
  border: 1px solid var(--policy-line);
  border-radius: 1rem;
  box-shadow: 0 10px 30px rgba(20, 24, 36, 0.04);
}

.policy-content {
  padding: 1.25rem 1.15rem 1.75rem;
}

@media (min-width: 768px) {
  .policy-content {
    padding: 1.75rem 1.75rem 2.25rem;
  }
}

.policy-intro {
  padding: 1rem 1.05rem;
  margin-bottom: 1.5rem;
  border-radius: 0.85rem;
  background: var(--policy-soft);
  border: 1px solid var(--policy-line);
}

.policy-intro h2 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  color: var(--policy-ink);
}

.policy-intro p {
  margin: 0;
  color: var(--policy-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.policy-intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.9rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--policy-line);
  font-size: 0.875rem;
  color: var(--policy-muted);
}

.policy-intro-meta strong {
  color: var(--policy-accent);
  font-weight: 600;
}

.policy-intro-meta a {
  color: var(--policy-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.policy-preamble {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--policy-line);
}

.policy-preamble h3 {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  color: var(--policy-ink);
}

.policy-preamble p {
  margin: 0 0 0.9rem;
  color: var(--policy-ink);
  font-size: 0.95rem;
  line-height: 1.8;
}

.policy-preamble p:last-child {
  margin-bottom: 0;
}

.policy-section {
  scroll-margin-top: calc(var(--policy-nav-h) + var(--policy-toc-h) + 0.85rem);
  padding: 1.25rem 0 1.35rem;
  border-bottom: 1px solid var(--policy-line);
}

.policy-section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.policy-section-title {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 0 0 0.95rem;
  color: var(--policy-ink);
  font-size: 1.05rem;
  line-height: 1.35;
  font-weight: 650;
}

.policy-section-num {
  flex: 0 0 auto;
  min-width: 1.85rem;
  height: 1.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: var(--policy-accent);
}

.policy-body {
  color: var(--policy-ink);
  font-size: 0.95rem;
  line-height: 1.85;
}

.policy-body p {
  margin: 0 0 0.85rem;
}

.policy-body p:last-child {
  margin-bottom: 0;
}

.policy-body h4,
.policy-body h5,
.policy-body h6 {
  margin: 1.15rem 0 0.55rem;
  font-size: 0.98rem;
  font-weight: 650;
  color: var(--policy-ink);
  line-height: 1.45;
}

.policy-body a {
  color: var(--policy-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.policy-body strong,
.policy-body b {
  font-weight: 650;
}

/* 侧栏目录 */
.policy-toc-wrap {
  position: sticky;
  top: calc(var(--policy-nav-h) + 0.75rem);
}

.policy-toc {
  padding: 1rem;
}

.policy-toc-label {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--policy-muted);
}

.policy-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.policy-toc-list a {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  border-radius: 0.65rem;
  color: var(--policy-muted);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

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

.policy-toc-list a.is-active {
  color: var(--policy-accent);
  background: rgba(255, 82, 43, 0.08);
  transform: translateX(2px);
}

.policy-toc-list .toc-num {
  flex: 0 0 auto;
  width: 1.35rem;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  opacity: 0.75;
}

.policy-toc-list .toc-text {
  flex: 1 1 auto;
  font-size: 0.875rem;
  line-height: 1.4;
}

/* 移动端章节导航：圆角卡片 + 内边距胶囊（与正文卡片对齐） */
.policy-toc-mobile {
  display: none;
  position: sticky;
  top: calc(var(--policy-nav-h) + 0.45rem);
  z-index: 30;
  margin: 0 0 0.9rem;
  padding: 0.55rem 0.6rem;
  background: var(--policy-surface);
  border: 1px solid var(--policy-line);
  border-radius: 1rem;
  box-shadow: 0 10px 28px rgba(20, 24, 36, 0.06);
}

.nice-dark-mode .policy-toc-mobile {
  background: var(--policy-surface);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.policy-toc-mobile-inner {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
}

.policy-toc-mobile-inner::before,
.policy-toc-mobile-inner::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1.15rem;
  z-index: 2;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.policy-toc-mobile-inner::before {
  left: 0;
  background: linear-gradient(90deg, var(--policy-surface), transparent);
}

.policy-toc-mobile-inner::after {
  right: 0;
  background: linear-gradient(270deg, var(--policy-surface), transparent);
}

.policy-toc-mobile-inner.has-left::before,
.policy-toc-mobile-inner.has-right::after {
  opacity: 1;
}

.policy-toc-mobile-scroller {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.1rem 0.15rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
}

.policy-toc-mobile-scroller::-webkit-scrollbar {
  display: none;
}

.policy-toc-mobile a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  min-height: 2rem;
  padding: 0.38rem 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--policy-line);
  background: var(--policy-soft);
  color: var(--policy-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  scroll-snap-align: start;
  box-shadow: inset 0 0 0 1px transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.policy-toc-mobile a .toc-n {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  opacity: 0.75;
}

.policy-toc-mobile a .toc-full {
  display: none;
}

.policy-toc-mobile a.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #ff6a3d 0%, var(--policy-accent) 100%);
  box-shadow: 0 6px 14px rgba(255, 82, 43, 0.28);
}

.policy-toc-mobile a.is-active .toc-n {
  opacity: 1;
}

@media (max-width: 991.98px) {
  .policy-toc-desktop {
    display: none;
  }
  .policy-toc-mobile {
    display: block;
  }
  .policy-section {
    scroll-margin-top: calc(var(--policy-nav-h) + var(--policy-toc-h) + 0.85rem);
  }
}

.policy-empty {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--policy-muted);
}

@media (prefers-reduced-motion: reduce) {
  .policy-toc-list a,
  .policy-toc-mobile a {
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

html {
  scroll-behavior: smooth;
}