.page-privacy {
  --privacy-num-col: 68px;
  --privacy-rule: rgba(47, 243, 208, .2);
  --privacy-rule-soft: rgba(31, 74, 64, .9);
  color: var(--arena-text);
}

/* ---------- 顶部窄幅色带 ---------- */

.page-privacy .privacy-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(76px, 11vw, 132px) 0 clamp(40px, 6vw, 76px);
  background: var(--arena-slate-a);
  border-bottom: 1px solid var(--arena-line);
}

.page-privacy .privacy-hero-img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .38;
  filter: saturate(.75);
}

.page-privacy .privacy-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(102deg, var(--arena-ink) 14%, rgba(6, 26, 21, .62) 48%, rgba(6, 26, 21, .92) 100%),
    linear-gradient(180deg, rgba(6, 26, 21, .35) 0%, var(--arena-ink) 94%);
}

.page-privacy .privacy-hero-body {
  position: relative;
}

.page-privacy .privacy-h1 {
  margin: 14px 0 18px;
}

.page-privacy .privacy-hero .arena-lede {
  max-width: 58ch;
}

.page-privacy .privacy-effective {
  margin: 26px 0 0;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--arena-muted);
  padding-left: 14px;
  border-left: 2px solid var(--arena-cyan);
}

/* ---------- 正文长卷 ---------- */

.page-privacy .privacy-wrap {
  padding-block: clamp(28px, 5vw, 56px) clamp(72px, 10vw, 128px);
}

.page-privacy .privacy-clause {
  display: grid;
  grid-template-columns: var(--privacy-num-col) minmax(0, 1fr);
  gap: 16px 24px;
  padding-block: clamp(36px, 5vw, 60px);
  border-top: 1px solid var(--privacy-rule);
}

.page-privacy .privacy-clause:first-of-type {
  border-top: 0;
}

.page-privacy .privacy-num {
  position: sticky;
  top: 104px;
  align-self: start;
}

.page-privacy .privacy-num span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 15px 15px 15px 5px;
  border: 1px solid var(--arena-line);
  background: var(--arena-panel);
  font-family: var(--arena-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--arena-cyan);
  font-variant-numeric: tabular-nums;
}

.page-privacy .privacy-body {
  max-width: 68ch;
  min-width: 0;
}

.page-privacy .privacy-h2 {
  margin: 0 0 18px;
  font-size: clamp(22px, 2.6vw, 31px);
  line-height: 1.24;
  letter-spacing: -.025em;
  font-weight: 900;
  color: var(--arena-text);
}

.page-privacy .privacy-body > p {
  margin: 0 0 16px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--arena-text);
}

.page-privacy .privacy-note {
  margin-top: 22px;
  padding: 14px 18px;
  border-left: 2px solid var(--arena-line);
  background: rgba(12, 44, 36, .6);
  border-radius: 0 16px 16px 0;
  font-size: 15px;
  color: var(--arena-muted);
}

/* ---------- 列表 ---------- */

.page-privacy .privacy-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-privacy .privacy-list li {
  position: relative;
  padding-left: 24px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--arena-text);
}

.page-privacy .privacy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 13px;
  height: 1px;
  background: var(--arena-cyan);
}

.page-privacy .privacy-key {
  color: var(--arena-cyan-soft);
  text-decoration: underline;
  text-decoration-color: var(--arena-cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

/* ---------- 三块信息 ---------- */

.page-privacy .privacy-blocks {
  display: grid;
  gap: 1px;
  margin: 22px 0 4px;
  background: var(--privacy-rule-soft);
  border: 1px solid var(--privacy-rule-soft);
  border-radius: var(--arena-radius-sm);
  overflow: hidden;
}

.page-privacy .privacy-block {
  background: var(--arena-panel);
  padding: clamp(18px, 3vw, 26px);
}

.page-privacy .privacy-block h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--arena-cyan-soft);
}

.page-privacy .privacy-block p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--arena-muted);
}

/* ---------- 四行说明 ---------- */

.page-privacy .privacy-rows {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--privacy-rule-soft);
}

.page-privacy .privacy-row {
  padding: 20px 0;
  border-bottom: 1px solid var(--privacy-rule-soft);
}

.page-privacy .privacy-row h3 {
  margin: 0 0 8px;
  font-family: var(--arena-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--arena-amber);
}

.page-privacy .privacy-row p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--arena-text);
}

/* ---------- 折叠补充 ---------- */

.page-privacy .privacy-details {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--arena-line);
}

.page-privacy .privacy-details summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--arena-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--arena-cyan);
}

.page-privacy .privacy-details summary::-webkit-details-marker {
  display: none;
}

.page-privacy .privacy-details summary::before {
  content: "+ ";
  color: var(--arena-cyan);
}

.page-privacy .privacy-details[open] summary::before {
  content: "− ";
}

.page-privacy .privacy-details summary:focus-visible {
  outline: 2px solid var(--arena-cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-privacy .privacy-details p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--arena-muted);
}

/* ---------- 链接 ---------- */

.page-privacy .privacy-link {
  color: var(--arena-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(47, 243, 208, .45);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 180ms var(--arena-ease), text-decoration-color 180ms var(--arena-ease);
}

.page-privacy .privacy-link:hover {
  color: var(--arena-cyan-soft);
  text-decoration-color: var(--arena-cyan-soft);
}

.page-privacy .privacy-link--strong {
  font-family: var(--arena-mono);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
  text-decoration-color: var(--arena-cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

/* ---------- 联系方式 ---------- */

.page-privacy .privacy-contact {
  display: grid;
  gap: 0;
  margin: 6px 0 26px;
  border-top: 1px solid var(--privacy-rule);
}

.page-privacy .privacy-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--privacy-rule);
}

.page-privacy .privacy-contact-label {
  flex: 0 0 auto;
  min-width: 76px;
  font-family: var(--arena-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--arena-muted);
}

.page-privacy .privacy-contact-value {
  font-size: 16px;
  line-height: 1.7;
  color: var(--arena-text);
}

/* ---------- 回到顶部 ---------- */

.page-privacy .privacy-backtop {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 11px 22px;
  border: 1px solid var(--arena-line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--arena-cyan);
  text-decoration: none;
  background: rgba(12, 44, 36, .7);
  transition: border-color 200ms var(--arena-ease), color 200ms var(--arena-ease), background-color 200ms var(--arena-ease);
}

.page-privacy .privacy-backtop::before {
  content: "↑";
  font-family: var(--arena-mono);
}

.page-privacy .privacy-backtop:hover {
  border-color: var(--arena-cyan);
  color: var(--arena-ink);
  background: var(--arena-cyan);
}

.page-privacy .privacy-backtop:focus-visible {
  outline: 2px solid var(--arena-cyan);
  outline-offset: 3px;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 760px) {
  .page-privacy .privacy-clause {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding-block: 32px;
  }

  .page-privacy .privacy-num {
    position: static;
  }

  .page-privacy .privacy-num span {
    width: 40px;
    height: 40px;
    font-size: 13.5px;
    border-radius: 13px 13px 13px 5px;
  }

  .page-privacy .privacy-body > p {
    font-size: 16px;
  }

  .page-privacy .privacy-list li {
    font-size: 15.5px;
    padding-left: 20px;
  }

  .page-privacy .privacy-list li::before {
    width: 10px;
  }

  .page-privacy .privacy-contact-row {
    flex-direction: column;
    gap: 6px;
  }

  .page-privacy .privacy-contact-label {
    min-width: 0;
  }

  .page-privacy .privacy-backtop {
    width: 100%;
    justify-content: center;
  }
}

@media (min-width: 1000px) {
  .page-privacy .privacy-clause {
    gap: 20px 36px;
  }

  .page-privacy .privacy-hero-body {
    padding-right: 34%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .privacy-link,
  .page-privacy .privacy-backtop {
    transition: none;
  }
}