.page-disclaimer {
  --u-rail: 96px;
  --u-line: 1px solid rgba(220, 229, 223, 0.16);
  --u-line-soft: 1px solid rgba(220, 229, 223, 0.1);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-disclaimer .breadcrumbs {
  margin: 22px 0 0;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  margin-top: 20px;
  padding: clamp(28px, 4vw, 44px) 0 clamp(26px, 3vw, 38px);
  border-top: var(--line-strong);
  overflow: hidden;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: min(44%, 420px);
  background: linear-gradient(155deg, rgba(59, 240, 206, 0.16), rgba(59, 240, 206, 0) 68%);
  clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-disclaimer .usage-hero__title {
  position: relative;
  z-index: 1;
  margin: 16px 0 0;
  max-width: 20ch;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-disclaimer .usage-hero__lead {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 248, 244, 0.84);
}

.page-disclaimer .usage-facts {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin-top: clamp(26px, 4vw, 38px);
  padding-top: 22px;
  border-top: var(--u-line);
  max-width: 840px;
}

.page-disclaimer .usage-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-disclaimer .usage-fact .metric__num {
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  color: var(--cyan-400);
}

.page-disclaimer .usage-fact:nth-child(3) .metric__num {
  color: var(--amber-500);
}

.page-disclaimer .usage-fact .metric__label {
  font-size: 12.5px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--slate-600);
}

/* ---------- 首屏图像 ---------- */
.page-disclaimer .usage-hero__media {
  display: grid;
  gap: 14px;
  margin: clamp(34px, 5vw, 52px) 0 0;
}

.page-disclaimer .usage-hero__media .media__frame {
  overflow: hidden;
  border: var(--u-line);
  background: linear-gradient(180deg, rgba(10, 46, 39, 0.9), rgba(4, 26, 22, 0.9));
}

.page-disclaimer .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .usage-hero__media .media__caption {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--slate-600);
}

/* ---------- 条目式小节 ---------- */
.page-disclaimer .usage-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: clamp(30px, 4vw, 46px) 0;
  border-top: var(--u-line);
  scroll-margin-top: 96px;
}

.page-disclaimer .usage-item > * {
  min-width: 0;
}

.page-disclaimer .usage-item__no {
  display: block;
  padding-top: 0.45em;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-disclaimer .usage-item__body {
  max-width: 960px;
  min-width: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(245, 248, 244, 0.84);
}

.page-disclaimer .usage-item__body > p {
  max-width: 62ch;
}

.page-disclaimer .usage-item__body > p + p {
  margin-top: 14px;
}

.page-disclaimer .usage-item__title {
  margin: 0 0 16px;
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-disclaimer .usage-inline-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 206, 0.45);
  padding-bottom: 2px;
}

.page-disclaimer .usage-inline-link:hover,
.page-disclaimer .usage-inline-link:focus-visible {
  color: var(--amber-300);
  border-bottom-color: var(--amber-300);
}

/* ---------- 许可范围 ---------- */
.page-disclaimer .license-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 20px;
}

.page-disclaimer .license-chip {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--pitch-950);
  transition: transform var(--dur) var(--ease);
}

.page-disclaimer .license-chip--open {
  background: var(--cyan-200);
}

.page-disclaimer .license-chip--team {
  background: var(--cyan-400);
}

.page-disclaimer .license-chip--public {
  background: var(--pitch-600);
  color: var(--paper-50);
}

.page-disclaimer .license-chip:hover,
.page-disclaimer .license-chip:focus-visible {
  transform: translateY(-2px);
}

.page-disclaimer .license-panels {
  display: grid;
  gap: 14px;
  margin-bottom: 20px;
}

.page-disclaimer .license-panel {
  padding: 20px 20px 22px;
  background: rgba(10, 46, 39, 0.72);
  border: var(--u-line);
  scroll-margin-top: 96px;
}

.page-disclaimer .license-panel h3 {
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.page-disclaimer .license-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 248, 244, 0.76);
}

.page-disclaimer .license-panel--open {
  border-left: 3px solid var(--cyan-200);
}

.page-disclaimer .license-panel--team {
  border-left: 3px solid var(--cyan-400);
}

.page-disclaimer .license-panel--public {
  border-left: 3px solid var(--amber-500);
}

.page-disclaimer .license-panel:target {
  background: rgba(20, 82, 69, 0.55);
}

/* ---------- 引用标注示例 ---------- */
.page-disclaimer .citation-sample {
  margin: 22px 0;
  padding: 18px 20px;
  background: rgba(10, 46, 39, 0.6);
  border-left: 3px solid var(--cyan-400);
}

.page-disclaimer .citation-sample__label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate-600);
}

.page-disclaimer .citation-sample__text {
  margin: 0;
  font-size: clamp(15px, 1.8vw, 18px);
  letter-spacing: 0.04em;
  color: var(--amber-500);
  word-break: break-word;
}

/* ---------- 维护窗口时间条 ---------- */
.page-disclaimer .window-wrap {
  margin: 24px 0 0;
}

.page-disclaimer .window-bar {
  display: grid;
  gap: 14px;
}

.page-disclaimer .window-bar__seg {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  min-height: 96px;
  border: var(--u-line);
  outline: none;
}

.page-disclaimer .window-bar__seg--live {
  background: linear-gradient(90deg, rgba(59, 240, 206, 0.16), rgba(20, 82, 69, 0.5));
  border-left: 3px solid var(--cyan-400);
}

.page-disclaimer .window-bar__seg--maint {
  background: rgba(20, 82, 69, 0.45);
  border-left: 3px solid var(--pitch-600);
}

.page-disclaimer .window-bar__seg--delay {
  background: rgba(10, 46, 39, 0.7);
  border-left: 3px solid var(--amber-500);
}

.page-disclaimer .window-bar__seg:focus-visible {
  box-shadow: inset 0 0 0 1px var(--cyan-400);
}

.page-disclaimer .window-bar__label {
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-disclaimer .window-bar__range {
  font-size: 13px;
  color: var(--cyan-200);
}

.page-disclaimer .window-bar__seg--delay .window-bar__range {
  color: var(--amber-300);
}

.page-disclaimer .window-bar__tip {
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(245, 248, 244, 0.74);
}

/* ---------- 反馈路径 ---------- */
.page-disclaimer .feedback-flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-disclaimer .feedback-flow__node {
  position: relative;
  padding: 20px;
  background: rgba(10, 46, 39, 0.55);
  border-top: 3px solid var(--pitch-600);
}

.page-disclaimer .feedback-flow__step {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--slate-600);
}

.page-disclaimer .feedback-flow__title {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
}

.page-disclaimer .feedback-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 248, 244, 0.76);
}

.page-disclaimer .feedback-tail {
  margin-top: 28px;
  padding-top: 18px;
  border-top: var(--u-line);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 248, 244, 0.76);
}

.page-disclaimer .feedback-tail a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 206, 0.45);
}

.page-disclaimer .feedback-tail a:hover,
.page-disclaimer .feedback-tail a:focus-visible {
  color: var(--amber-300);
  border-bottom-color: var(--amber-300);
}

/* ---------- 进入动效 ---------- */
:is(.js) .page-disclaimer [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

:is(.js) .page-disclaimer [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 大屏布局 ---------- */
@media (min-width: 780px) {
  .page-disclaimer .usage-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-disclaimer .license-panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-disclaimer .usage-item {
    grid-template-columns: var(--u-rail) minmax(0, 1fr);
    gap: 0 34px;
  }

  .page-disclaimer .window-bar {
    grid-template-columns: 1.6fr 1fr 1fr;
  }

  .page-disclaimer .window-wrap {
    padding-bottom: 96px;
  }

  .page-disclaimer .window-bar__tip {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 100%;
    margin-top: 10px;
    padding-top: 10px;
    border-top: var(--u-line-soft);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }

  .page-disclaimer .window-bar__seg:hover .window-bar__tip,
  .page-disclaimer .window-bar__seg:focus .window-bar__tip,
  .page-disclaimer .window-bar__seg:focus-within .window-bar__tip {
    opacity: 1;
    visibility: visible;
  }

  .page-disclaimer .feedback-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-disclaimer .feedback-flow__node {
    background: transparent;
    padding: 20px 24px 20px 0;
    border-top: 3px solid var(--cyan-400);
  }

  .page-disclaimer .feedback-flow__node + .feedback-flow__node {
    padding-left: 24px;
    border-left: var(--u-line);
  }

  .page-disclaimer .feedback-flow__node:last-child {
    border-top-color: var(--amber-500);
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__media {
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: end;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .license-chip:hover,
  .page-disclaimer .license-chip:focus-visible {
    transform: none;
  }

  :is(.js) .page-disclaimer [data-reveal] {
    transform: none;
    transition: opacity var(--dur) linear;
  }
}