.page-privacy {
  --privacy-measure: 62ch;
  --privacy-rail-width: 172px;
  --privacy-gap: clamp(32px, 5vw, 76px);
  --privacy-step: clamp(56px, 7vw, 92px);
  --privacy-hairline: rgba(31, 64, 56, 0.72);
  --privacy-body: rgba(233, 245, 242, 0.84);
  position: relative;
  padding-bottom: clamp(80px, 11vw, 140px);
}

/* 阅读进度：滚动驱动，不做脚本也能优雅降级 */
.page-privacy .privacy-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  background: rgba(31, 64, 56, 0.55);
  z-index: 30;
  pointer-events: none;
}

.page-privacy .privacy-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

@supports (animation-timeline: scroll()) {
  @media (prefers-reduced-motion: no-preference) {
    .page-privacy .privacy-progress span {
      animation: privacy-scroll-fill linear both;
      animation-timeline: scroll(root block);
    }
  }
}

@keyframes privacy-scroll-fill {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 首屏 */
.page-privacy .privacy-hero {
  position: relative;
  background: linear-gradient(180deg, var(--charcoal) 0%, var(--ink) 72%);
  padding: clamp(104px, 15vw, 176px) 0 clamp(56px, 8vw, 96px);
  overflow: hidden;
}

.page-privacy .privacy-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--edge) 16%, var(--edge) 84%, transparent);
}

.page-privacy .privacy-hero-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(36px, 5vw, 60px);
  align-items: end;
}

.page-privacy .privacy-hero-copy .breadcrumb {
  margin-bottom: 26px;
}

.page-privacy .privacy-hero-copy .eyebrow {
  margin: 0 0 14px;
}

.page-privacy .privacy-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 22px;
  max-width: 20ch;
}

.page-privacy .privacy-lede {
  max-width: 54ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 22px;
}

.page-privacy .privacy-stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 8px 16px 8px 13px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: rgba(22, 48, 42, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-privacy .privacy-hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--deep-green);
  isolation: isolate;
}

.page-privacy .privacy-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, rgba(47, 230, 198, 0.14), rgba(10, 19, 17, 0.6));
  pointer-events: none;
}

.page-privacy .privacy-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) brightness(0.86);
}

/* 正文骨架 */
.page-privacy .privacy-layout {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(44px, 6vw, 72px);
  align-items: start;
}

.page-privacy .privacy-rail {
  min-width: 0;
}

.page-privacy .privacy-rail-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-privacy .privacy-rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-privacy .privacy-rail-list::-webkit-scrollbar {
  display: none;
}

.page-privacy .privacy-rail-list li {
  flex: 0 0 auto;
}

.page-privacy .privacy-rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--deep-green);
  color: var(--mist);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-privacy .privacy-rail-list a:hover,
.page-privacy .privacy-rail-list a:focus-visible {
  background: var(--signal);
  color: var(--ink);
}

.page-privacy .privacy-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  opacity: 0.7;
}

.page-privacy .privacy-article {
  min-width: 0;
  max-width: var(--privacy-measure);
  counter-reset: privacy-sec;
}

/* 段落 */
.page-privacy .privacy-section {
  position: relative;
  counter-increment: privacy-sec;
  padding: var(--privacy-step) 0;
  border-top: 1px solid var(--privacy-hairline);
}

.page-privacy .privacy-section:first-of-type {
  border-top: 0;
  padding-top: clamp(24px, 3vw, 40px);
}

.page-privacy .privacy-section::before {
  content: counter(privacy-sec, decimal-leading-zero);
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--signal);
}

.page-privacy .privacy-label {
  display: inline-block;
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-privacy .privacy-section h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 33px);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 20px;
  max-width: 24ch;
}

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

.page-privacy .privacy-section p:last-child {
  margin-bottom: 0;
}

.page-privacy .privacy-section a {
  color: var(--signal-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-privacy .privacy-section a:hover {
  color: var(--signal);
}

/* 四类功能清单 */
.page-privacy .privacy-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-privacy .privacy-list li {
  padding: 20px 0;
  border-top: 1px solid var(--privacy-hairline);
}

.page-privacy .privacy-list li:last-child {
  padding-bottom: 0;
}

.page-privacy .privacy-list h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-privacy .privacy-list p {
  margin: 0;
  font-size: 15.5px;
  color: var(--mist);
}

/* 使用方式 */
.page-privacy .privacy-purpose {
  margin: 26px 0 22px;
  display: grid;
  gap: 18px;
}

.page-privacy .privacy-purpose p {
  margin: 0;
  font-size: 15.5px;
  color: var(--privacy-body);
}

.page-privacy .privacy-inline-label {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--deep-green);
  color: var(--signal);
  font-size: 12px;
  letter-spacing: 0.1em;
  vertical-align: 2px;
}

/* 保留与安全 */
.page-privacy .privacy-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-privacy .privacy-facts li {
  padding-left: 16px;
  border-left: 1px solid var(--privacy-hairline);
}

.page-privacy .privacy-fact-key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-privacy .privacy-facts p {
  margin: 0;
  font-size: 15.5px;
  color: var(--mist);
}

/* 可展开的操作说明 */
.page-privacy .privacy-action {
  border-top: 1px solid var(--privacy-hairline);
  padding: 18px 0;
}

.page-privacy .privacy-action:last-of-type {
  padding-bottom: 0;
}

.page-privacy .privacy-action summary {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding-left: 16px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}

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

.page-privacy .privacy-action summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 2px;
  background: var(--signal);
}

.page-privacy .privacy-action summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--signal);
  transition: transform 0.22s var(--ease);
}

.page-privacy .privacy-action[open] summary::after {
  transform: rotate(45deg);
}

.page-privacy .privacy-action-text {
  padding-right: 12px;
}

.page-privacy .privacy-action p {
  margin: 12px 0 0;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* 联系段落 */
.page-privacy .privacy-mail {
  color: var(--score-soft);
  font-size: 15px;
  letter-spacing: 0.02em;
  word-break: break-all;
}

/* 延伸阅读 */
.page-privacy .privacy-more {
  margin-top: var(--privacy-step);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--edge);
}

.page-privacy .privacy-more-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-privacy .privacy-more-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-privacy .privacy-more-list a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  color: var(--white);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid var(--privacy-hairline);
  transition: color 0.2s var(--ease);
}

.page-privacy .privacy-more-list a::before {
  content: "";
  flex: 0 0 auto;
  width: 18px;
  height: 1px;
  background: var(--signal);
  transition: width 0.22s var(--ease);
}

.page-privacy .privacy-more-list a:hover,
.page-privacy .privacy-more-list a:focus-visible {
  color: var(--signal);
}

.page-privacy .privacy-more-list a:hover::before {
  width: 34px;
}

/* 平板 */
@media (min-width: 768px) {
  .page-privacy .privacy-purpose {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-privacy .privacy-facts {
    grid-template-columns: 1fr 1fr;
    gap: 24px 32px;
  }
}

/* 桌面：左侧轨道 + 窄栏长文 */
@media (min-width: 1000px) {
  .page-privacy .privacy-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  }

  .page-privacy .privacy-layout {
    grid-template-columns: var(--privacy-rail-width) minmax(0, 1fr);
    gap: var(--privacy-gap);
  }

  .page-privacy .privacy-rail {
    position: sticky;
    top: 128px;
  }

  .page-privacy .privacy-rail-list {
    flex-direction: column;
    overflow: visible;
    gap: 4px;
    padding-bottom: 0;
  }

  .page-privacy .privacy-rail-list a {
    width: 100%;
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 10px 12px;
  }

  .page-privacy .privacy-rail-list a:hover,
  .page-privacy .privacy-rail-list a:focus-visible {
    background: var(--deep-green);
    color: var(--white);
  }

  .page-privacy .privacy-rail-list a:hover .privacy-rail-num {
    color: var(--signal);
    opacity: 1;
  }

  .page-privacy .privacy-section::before {
    margin-bottom: 18px;
  }
}

/* 宽屏：段落序号移到栏外 */
@media (min-width: 1240px) {
  .page-privacy .privacy-article {
    max-width: 68ch;
  }

  .page-privacy .privacy-section::before {
    position: absolute;
    top: calc(var(--privacy-step) + 6px);
    left: -42px;
    margin: 0;
  }

  .page-privacy .privacy-section:first-of-type::before {
    top: calc(clamp(24px, 3vw, 40px) + 6px);
  }

  .page-privacy .privacy-section h2,
  .page-privacy .privacy-list p,
  .page-privacy .privacy-facts p,
  .page-privacy .privacy-purpose p,
  .page-privacy .privacy-action p,
  .page-privacy .privacy-section > p {
    max-width: var(--privacy-measure);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .privacy-progress span {
    animation: none;
    transform: scaleX(1);
    opacity: 0.4;
  }

  .page-privacy .privacy-action summary::after,
  .page-privacy .privacy-more-list a::before {
    transition: none;
  }
}