/* ===== 使用说明页 · page-disclaimer ===== */

.page-disclaimer {
  --use-soft: rgba(169, 196, 220, .34);
  --use-grid: rgba(169, 196, 220, .2);
}

/* --- 蓝图网格底纹 --- */
.page-disclaimer .use-intro,
.page-disclaimer .use-block {
  background-image:
    linear-gradient(to right, var(--use-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--use-grid) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
}

.page-disclaimer img {
  max-width: 100%;
  height: auto;
}

/* --- 首屏 --- */
.page-disclaimer .use-intro__panel {
  display: grid;
  gap: var(--gap-4);
  padding: var(--gap-4) var(--gap-3);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(255, 255, 255, .96), rgba(232, 237, 243, .82));
  box-shadow: var(--shadow-card);
}

.page-disclaimer .use-intro__copy {
  display: flex;
  flex-direction: column;
  gap: var(--gap-2);
  min-width: 0;
}

.page-disclaimer .use-intro__copy .crumbs {
  margin-bottom: 4px;
}

.page-disclaimer .use-intro__copy .t-display {
  margin: 0;
  font-size: clamp(26px, 6.4vw, 42px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-disclaimer .use-intro__copy .lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 54ch;
}

.page-disclaimer .use-intro__figure {
  margin: 0;
  min-width: 0;
}

.page-disclaimer .use-intro__figure .figure__media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(150deg, #EAF1F8, #F8FBFD 58%, #EDF6F1);
}

.page-disclaimer .use-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .use-intro__figure .figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* --- 三条摘要 --- */
.page-disclaimer .glance {
  list-style: none;
  margin: var(--gap-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap-2);
}

.page-disclaimer .glance__item {
  position: relative;
  padding: var(--gap-3);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--white);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-disclaimer .glance__item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-soft) 62%, var(--mint));
}

.page-disclaimer .glance__num {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-disclaimer .glance__key {
  margin: 6px 0 4px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--sea-900);
}

.page-disclaimer .glance__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

/* --- 章节 --- */
.page-disclaimer .use-block {
  padding-top: var(--gap-4);
}

.page-disclaimer .use-block .section__head {
  margin-bottom: var(--gap-3);
}

.page-disclaimer .use-block__intro {
  margin: var(--gap-2) 0 0;
  max-width: 62ch;
  color: var(--slate);
}

/* --- 条目卡片 --- */
.page-disclaimer .use-cards {
  display: grid;
  gap: var(--gap-3);
}

.page-disclaimer .use-card {
  display: flex;
  flex-direction: column;
  gap: var(--gap-2);
  padding: var(--gap-3);
  min-width: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition: border-color .26s var(--ease), box-shadow .26s var(--ease);
}

.page-disclaimer .use-card:hover,
.page-disclaimer .use-card:focus-within {
  border-color: var(--gold);
  box-shadow: 0 1px 0 rgba(11, 37, 69, .05), 0 20px 36px -28px rgba(201, 162, 39, .72);
}

.page-disclaimer .use-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px var(--gap-2);
}

.page-disclaimer .use-card__num {
  flex: none;
  padding: 2px 9px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--sea-500);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: var(--paper);
}

.page-disclaimer .use-card__head .t-h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.42;
  color: var(--sea-900);
}

.page-disclaimer .use-card > .t-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .use-card .acc {
  margin-top: auto;
  padding-top: var(--gap-2);
  border-top: 1px dashed var(--line-soft);
}

/* --- 卡片里的要点列表 --- */
.page-disclaimer .use-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .use-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-disclaimer .use-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .14);
}

/* --- 版本时间刻度 --- */
.page-disclaimer .timeline {
  margin-top: var(--gap-4);
  padding: var(--gap-3);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255, 255, 255, .95), rgba(245, 247, 250, .9));
}

.page-disclaimer .timeline__track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: var(--gap-3);
}

.page-disclaimer .timeline__year {
  display: block;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--sea-500);
}

.page-disclaimer .timeline__label {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

.page-disclaimer .timeline__note {
  margin: var(--gap-3) 0 0;
  padding-top: var(--gap-2);
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate);
}

.page-disclaimer .timeline__note a {
  color: var(--sea-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- 复制邮箱条 --- */
.page-disclaimer .use-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px var(--gap-2);
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.page-disclaimer .use-mail__addr {
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--sea-900);
  word-break: break-all;
}

.page-disclaimer .use-mail .copy {
  margin-left: auto;
  white-space: nowrap;
  flex: none;
}

/* --- 返回帮助中心引导条 --- */
.page-disclaimer .use-exit {
  margin-top: var(--gap-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-2) var(--gap-3);
  padding: var(--gap-3);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--sea-500);
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(30, 92, 143, .07), rgba(95, 199, 169, .1));
}

.page-disclaimer .use-exit__copy {
  min-width: 0;
  flex: 1 1 260px;
}

.page-disclaimer .use-exit__code {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sea-500);
}

.page-disclaimer .use-exit__copy .t-body {
  margin: 6px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* --- 中等屏幕 --- */
@media (min-width: 760px) {
  .page-disclaimer .glance {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap-3);
  }

  .page-disclaimer .use-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: var(--gap-3);
  }
}

/* --- 时间刻度：窄屏竖向 --- */
@media (max-width: 799px) {
  .page-disclaimer .timeline__track {
    padding-left: 22px;
  }

  .page-disclaimer .timeline__track::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: var(--line);
  }

  .page-disclaimer .timeline__node {
    position: relative;
  }

  .page-disclaimer .timeline__node::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 6px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 0 4px rgba(201, 162, 39, .16);
  }

  .page-disclaimer .timeline__node--old::before {
    background: var(--sea-500);
    box-shadow: 0 0 0 4px rgba(30, 92, 143, .16);
  }

  .page-disclaimer .timeline__node--live::before {
    background: var(--mint);
    box-shadow: 0 0 0 4px rgba(95, 199, 169, .2);
  }

  .page-disclaimer .timeline__node--keep::before {
    background: var(--amber);
    box-shadow: 0 0 0 4px rgba(242, 153, 74, .2);
  }
}

/* --- 时间刻度：宽屏横向 --- */
@media (min-width: 800px) {
  .page-disclaimer .timeline {
    padding: var(--gap-3) var(--gap-4) var(--gap-3);
  }

  .page-disclaimer .timeline__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--gap-3);
    padding-top: 24px;
  }

  .page-disclaimer .timeline__track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 11px;
    height: 1px;
    background: linear-gradient(90deg, var(--sea-500), var(--gold-soft) 52%, var(--mint));
  }

  .page-disclaimer .timeline__node {
    position: relative;
  }

  .page-disclaimer .timeline__node::before {
    content: "";
    position: absolute;
    left: 0;
    top: -19px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--sea-500);
  }

  .page-disclaimer .timeline__node--new::before {
    border-color: var(--gold);
    background: var(--gold-soft);
    box-shadow: 0 0 0 4px rgba(201, 162, 39, .16);
  }

  .page-disclaimer .timeline__node--live::before {
    border-color: var(--mint);
  }

  .page-disclaimer .timeline__node--keep::before {
    border-color: var(--amber);
  }

  .page-disclaimer .timeline__note {
    margin-top: var(--gap-2);
  }
}

/* --- 大屏首屏分栏 --- */
@media (min-width: 900px) {
  .page-disclaimer .use-intro__panel {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: var(--gap-4);
    padding: var(--gap-5) var(--gap-4);
  }
}

/* --- 动效降级 --- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .use-card {
    transition: none;
  }
}