.page-disclaimer {
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(880px 420px at 10% -8%, rgba(245, 197, 66, 0.10), transparent 62%),
    radial-gradient(760px 380px at 94% 2%, rgba(34, 211, 238, 0.10), transparent 60%);
  background-repeat: no-repeat;
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding: 22px 0 42px;
}

.page-disclaimer .hero-grid {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-disclaimer h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 6.4vw, 54px);
  line-height: 1.06;
  letter-spacing: 0.012em;
  margin: 14px 0 0;
}

.page-disclaimer .lede {
  margin: 18px 0 0;
  max-width: 48ch;
  color: var(--ink-dim);
  font-size: 16.5px;
  line-height: 1.78;
}

.page-disclaimer .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-disclaimer .hero-figure {
  margin: 0;
}

.page-disclaimer .hero-figure .img-frame {
  aspect-ratio: 3 / 2;
}

.page-disclaimer .hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-disclaimer .hero-figure .img-cap {
  display: block;
  margin-top: 12px;
  color: var(--ink-dim);
  font-size: 13px;
  line-height: 1.7;
}

@media (min-width: 940px) {
  .page-disclaimer .usage-hero {
    padding: 30px 0 56px;
  }

  .page-disclaimer .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 48px;
    align-items: center;
  }
}

/* ---------- 段落索引 ---------- */
.page-disclaimer .usage-toc {
  padding: 0 0 38px;
}

.page-disclaimer .toc-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .toc-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-disclaimer .toc-link:hover,
.page-disclaimer .toc-link:focus-visible {
  border-color: var(--cyan);
  background: var(--panel-deep);
  transform: translateY(-2px);
}

.page-disclaimer .toc-num {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  background: var(--panel-deep);
  border: 1px solid var(--line);
  padding: 5px 8px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.page-disclaimer .toc-text {
  font-size: 15px;
  line-height: 1.55;
  min-width: 0;
}

@media (min-width: 640px) {
  .page-disclaimer .toc-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-disclaimer .toc-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 分节骨架 ---------- */
.page-disclaimer .usage-section {
  padding: 38px 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-row {
  display: grid;
  gap: 14px;
}

.page-disclaimer .usage-index {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent, var(--cyan));
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-disclaimer .usage-index::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.page-disclaimer .sec-access { --accent: var(--cyan); }
.page-disclaimer .sec-rooms { --accent: var(--violet); }
.page-disclaimer .sec-records { --accent: var(--gold); }
.page-disclaimer .sec-contact { --accent: var(--newbie); }

.page-disclaimer .usage-body {
  min-width: 0;
}

.page-disclaimer .usage-body h2 {
  font-family: var(--font-head);
  font-size: clamp(23px, 3.8vw, 32px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0 0 14px;
}

.page-disclaimer .usage-body > p {
  margin: 0 0 16px;
  max-width: 70ch;
  color: var(--ink-dim);
  line-height: 1.78;
}

.page-disclaimer .usage-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-disclaimer .usage-body a:hover {
  color: var(--gold);
}

@media (min-width: 860px) {
  .page-disclaimer .usage-section {
    padding: 56px 0;
  }

  .page-disclaimer .usage-row {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 40px;
  }

  .page-disclaimer .usage-index {
    display: block;
    padding-top: 8px;
    font-size: 30px;
    letter-spacing: 0.04em;
  }

  .page-disclaimer .usage-index::after {
    display: block;
    flex: none;
    width: 40px;
    height: 2px;
    margin-top: 14px;
    background: linear-gradient(90deg, var(--accent, var(--cyan)), transparent);
  }
}

/* ---------- 设备支持 ---------- */
.page-disclaimer .device-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-disclaimer .device-list li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
}

/* ---------- 房间规则板 ---------- */
.page-disclaimer .rule-board {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .rule-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--item-accent, var(--cyan));
  border-radius: var(--radius);
  padding: 16px 16px 18px;
  overflow: hidden;
  transition: transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-disclaimer .rule-item::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(225deg, var(--item-accent, var(--cyan)), transparent 72%);
  opacity: 0.35;
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-disclaimer .rule-item:hover {
  transform: translateY(-2px);
  border-color: var(--item-accent, var(--cyan));
}

.page-disclaimer .rule-item--newbie { --item-accent: var(--newbie); }
.page-disclaimer .rule-item--classic { --item-accent: var(--classic); }
.page-disclaimer .rule-item--arena { --item-accent: var(--arena); }
.page-disclaimer .rule-item--casual { --item-accent: var(--casual); }
.page-disclaimer .rule-item--violet { --item-accent: var(--violet); }
.page-disclaimer .rule-item--ret { --item-accent: var(--ret); }

.page-disclaimer .rule-item h3 {
  font-family: var(--font-head);
  font-size: 16.5px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  margin: 10px 0 8px;
}

.page-disclaimer .rule-item p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.72;
}

@media (min-width: 700px) {
  .page-disclaimer .rule-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .rule-board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 折叠问答 ---------- */
.page-disclaimer .fold-list {
  margin: 26px 0 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .rule-fold {
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-disclaimer .rule-fold[open] {
  border-color: #2c3a5e;
}

.page-disclaimer .rule-fold summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  font-family: var(--font-head);
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink);
}

.page-disclaimer .rule-fold summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .rule-fold summary::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

.page-disclaimer .rule-fold[open] summary::after {
  content: "－";
}

.page-disclaimer .rule-fold summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--radius);
}

.page-disclaimer .rule-fold .fold-body {
  margin: 0;
  padding: 0 18px 16px;
  max-width: 72ch;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.76;
}

/* ---------- 记录说明列表 ---------- */
.page-disclaimer .record-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-disclaimer .record-list li {
  background: var(--panel);
  padding: 15px 18px;
  display: grid;
  gap: 6px;
}

.page-disclaimer .record-key {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-disclaimer .record-val {
  min-width: 0;
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.72;
}

.page-disclaimer .record-note {
  margin: 20px 0 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.76;
}

@media (min-width: 760px) {
  .page-disclaimer .record-list li {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 22px;
  }
}

/* ---------- 联系区 ---------- */
.page-disclaimer .reach-band {
  margin-top: 24px;
  padding: 22px;
  display: grid;
  gap: 18px;
  background:
    linear-gradient(115deg, rgba(52, 211, 153, 0.10), transparent 58%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-disclaimer .reach-band h3 {
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
}

.page-disclaimer .reach-band p {
  margin: 0;
  max-width: 56ch;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.74;
}

.page-disclaimer .reach-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: center;
}

.page-disclaimer .slash-rule {
  height: 8px;
  margin: 32px 0 0;
  background: repeating-linear-gradient(-52deg, var(--line) 0 2px, transparent 2px 12px);
  opacity: 0.75;
}

@media (min-width: 820px) {
  .page-disclaimer .reach-band {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
    padding: 26px 28px;
  }

  .page-disclaimer .reach-actions {
    justify-content: flex-end;
  }
}