/* ===== 使用规范页 /usage/ ===== */
.page-disclaimer {
  --scope-personal: var(--green);
  --scope-derivative: var(--violet);
  --scope-commercial: var(--orange);
  background: var(--ink);
  color: var(--fog);
  padding-bottom: clamp(40px, 6vw, 80px);
  overflow-x: clip;
}

.page-disclaimer [id] {
  scroll-margin-top: 28px;
}

.page-disclaimer a:focus-visible,
.page-disclaimer [tabindex]:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

/* ---- 顶部区块 ---- */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(28px, 6vw, 64px) 0 clamp(24px, 4vw, 42px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 92% at 6% 0%, rgba(255, 122, 26, .24), transparent 58%),
    radial-gradient(88% 80% at 94% 14%, rgba(139, 92, 246, .22), transparent 62%),
    radial-gradient(72% 70% at 58% 104%, rgba(31, 169, 122, .16), transparent 64%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(124, 135, 152, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 135, 152, .12) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(120% 100% at 22% 8%, #000 18%, transparent 76%);
  mask-image: radial-gradient(120% 100% at 22% 8%, #000 18%, transparent 76%);
  pointer-events: none;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
}

.page-disclaimer .usage-hero__eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 3px solid var(--orange);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 52px);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 0 0 18px;
  max-width: 16em;
  text-shadow: 0 0 30px rgba(255, 122, 26, .22);
}

.page-disclaimer .usage-hero__title::after {
  content: "";
  display: block;
  width: clamp(110px, 24vw, 250px);
  height: 6px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--orange), var(--yellow) 42%, var(--green) 74%, var(--blue));
  transform: skewX(-14deg);
  border-radius: 2px;
}

.page-disclaimer .usage-hero__lede {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: rgba(242, 245, 250, .82);
}

.page-disclaimer .usage-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- 首屏图 ---- */
.page-disclaimer .scope-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border-radius: var(--radius-m);
}

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

.page-disclaimer .scope-figure .img-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---- 章节跳转 ---- */
.page-disclaimer .scope-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: clamp(16px, 2.8vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .scope-toc__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mute);
}

.page-disclaimer .scope-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .scope-toc__list a {
  display: inline-block;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  color: var(--pale);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(26, 32, 48, .5);
  transition: color .2s var(--ease), border-color .2s var(--ease),
              background .2s var(--ease), transform .2s var(--ease);
}

.page-disclaimer .scope-toc__list a:hover {
  color: var(--fog);
  border-color: var(--blue);
  background: rgba(47, 168, 255, .16);
  transform: translateY(-2px);
}

/* ---- 范围速览带 ---- */
.page-disclaimer .scope-band {
  padding: clamp(32px, 5vw, 62px) 0 clamp(30px, 4vw, 52px);
  background:
    linear-gradient(180deg, rgba(139, 92, 246, .12), rgba(26, 32, 48, .28) 70%, transparent);
}

.page-disclaimer .section-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-disclaimer .section-head .section-title {
  font-family: var(--font-display);
  font-weight: 900;
}

.page-disclaimer .section-note {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 245, 250, .68);
}

.page-disclaimer .scope-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .scope-card {
  --accent: var(--blue);
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: var(--panel);
  overflow: hidden;
  transition: transform .26s var(--ease), opacity .26s var(--ease),
              border-color .26s var(--ease), box-shadow .26s var(--ease);
}

.page-disclaimer .scope-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--accent);
}

.page-disclaimer .scope-card--personal { --accent: var(--scope-personal); }
.page-disclaimer .scope-card--derivative { --accent: var(--scope-derivative); }
.page-disclaimer .scope-card--commercial { --accent: var(--scope-commercial); }

.page-disclaimer .scope-cards:hover .scope-card,
.page-disclaimer .scope-cards:focus-within .scope-card {
  opacity: .58;
}

.page-disclaimer .scope-cards:hover .scope-card:hover,
.page-disclaimer .scope-cards:focus-within .scope-card:focus-within {
  opacity: 1;
}

.page-disclaimer .scope-card:hover,
.page-disclaimer .scope-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 16px 38px rgba(0, 0, 0, .46), 0 0 0 1px rgba(255, 255, 255, .04) inset;
}

.page-disclaimer .scope-card__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 26px;
  padding: 0 10px;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
  border: 1px solid currentColor;
  border-radius: 999px;
  background: rgba(255, 255, 255, .05);
}

.page-disclaimer .scope-card__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.45;
}

.page-disclaimer .scope-card__brief {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 245, 250, .72);
}

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

.page-disclaimer .scope-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 245, 250, .86);
}

.page-disclaimer .scope-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.page-disclaimer .scope-card .cta-link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: opacity .2s var(--ease);
}

.page-disclaimer .scope-card .cta-link:hover {
  opacity: .72;
}

/* ---- 细则章节 ---- */
.page-disclaimer .rule-section {
  padding: clamp(32px, 5vw, 60px) 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .rule-section--alt {
  background: rgba(26, 32, 48, .5);
}

.page-disclaimer .rule-list {
  display: grid;
  gap: 12px;
}

.page-disclaimer .rule-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(124, 135, 152, .5);
  border-radius: var(--radius-s);
  background: rgba(17, 20, 28, .62);
  transition: transform .22s var(--ease), border-color .22s var(--ease),
              background .22s var(--ease);
}

.page-disclaimer .rule-item:hover {
  transform: translateX(4px);
  border-left-color: var(--orange);
  background: rgba(17, 20, 28, .92);
}

.page-disclaimer .rule-item__no {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-disclaimer .rule-item__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-disclaimer .rule-item__text {
  margin: 0;
  font-size: 14.6px;
  line-height: 1.82;
  color: rgba(242, 245, 250, .76);
}

.page-disclaimer .rule-item__text a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 168, 255, .45);
}

.page-disclaimer .rule-item__text a:hover {
  border-bottom-color: var(--blue);
}

/* ---- 署名示例框 ---- */
.page-disclaimer .sample-box {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: var(--ink-deep);
}

.page-disclaimer .sample-box__label {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--green);
}

.page-disclaimer .sample-box code {
  display: block;
  margin-bottom: 8px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: #D6E0F0;
  word-break: break-word;
  border-left: 2px solid rgba(31, 169, 122, .6);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(31, 169, 122, .07);
}

.page-disclaimer .sample-box code:last-child {
  margin-bottom: 0;
}

/* ---- 旧版本列表 ---- */
.page-disclaimer .archive-list {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .archive-row {
  display: grid;
  gap: 6px;
  padding: 15px 17px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--violet);
  border-radius: var(--radius-s);
  background: rgba(26, 32, 48, .68);
}

.page-disclaimer .archive-row--current {
  border-left-color: var(--orange);
  background: rgba(255, 122, 26, .08);
}

.page-disclaimer .archive-row__ver {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-disclaimer .archive-row--current .archive-row__ver {
  color: var(--orange);
}

.page-disclaimer .archive-row__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-disclaimer .archive-row__desc {
  margin: 0;
  font-size: 14.4px;
  line-height: 1.75;
  color: rgba(242, 245, 250, .74);
}

/* ---- 申请流程 ---- */
.page-disclaimer .flow-list {
  counter-reset: flow;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .flow-list li {
  counter-increment: flow;
  position: relative;
  padding: 16px 18px 16px 60px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(17, 20, 28, .6);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

.page-disclaimer .flow-list li:hover {
  border-color: rgba(255, 212, 0, .5);
  background: rgba(17, 20, 28, .9);
}

.page-disclaimer .flow-list li::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--yellow);
}

.page-disclaimer .flow-list__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-disclaimer .flow-list__text {
  margin: 0;
  font-size: 14.6px;
  line-height: 1.8;
  color: rgba(242, 245, 250, .76);
}

.page-disclaimer .flow-list__text a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 168, 255, .45);
}

.page-disclaimer .flow-list__text a:hover {
  border-bottom-color: var(--blue);
}

/* ---- 联系条 ---- */
.page-disclaimer .contact-strip {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: linear-gradient(120deg, rgba(255, 122, 26, .1), rgba(139, 92, 246, .08) 55%, rgba(31, 169, 122, .1));
}

.page-disclaimer .contact-strip__item {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0 0 10px;
  font-size: 14.6px;
  line-height: 1.7;
  color: var(--fog);
}

.page-disclaimer .contact-strip__key {
  min-width: 46px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--blue);
  padding-top: 3px;
}

.page-disclaimer .contact-strip__note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(242, 245, 250, .7);
}

/* ---- 收尾入口 ---- */
.page-disclaimer .usage-cta-section {
  padding: clamp(30px, 5vw, 56px) 0 0;
}

.page-disclaimer .usage-cta {
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background:
    linear-gradient(135deg, rgba(255, 122, 26, .18), rgba(139, 92, 246, .18) 52%, rgba(31, 169, 122, .16));
}

.page-disclaimer .usage-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.35;
}

.page-disclaimer .usage-cta__text {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 15.2px;
  line-height: 1.85;
  color: rgba(242, 245, 250, .84);
}

.page-disclaimer .usage-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-cta__links a {
  display: inline-block;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  border-radius: 999px;
  background: var(--fog);
  transition: transform .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}

.page-disclaimer .usage-cta__links a:hover {
  transform: translateY(-2px);
  background: var(--yellow);
}

/* ---- 断点 ---- */
@media (min-width: 640px) {
  .page-disclaimer .rule-item {
    grid-template-columns: 56px minmax(0, 1fr);
    padding: 18px 22px;
    gap: 6px 18px;
  }

  .page-disclaimer .rule-item__title {
    font-size: 17.5px;
  }

  .page-disclaimer .archive-row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 18px;
    padding: 17px 20px;
  }

  .page-disclaimer .archive-row__ver {
    grid-row: 1 / span 2;
  }

  .page-disclaimer .contact-strip__item {
    gap: 6px 18px;
  }
}

@media (min-width: 860px) {
  .page-disclaimer .scope-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-disclaimer .scope-card:nth-child(2) {
    margin-top: 26px;
  }

  .page-disclaimer .scope-card:nth-child(3) {
    margin-top: 52px;
  }

  .page-disclaimer .scope-card {
    padding: 24px 22px 22px;
  }

  .page-disclaimer .scope-card__name {
    font-size: 19px;
  }

  .page-disclaimer .rule-list {
    gap: 14px;
  }

  .page-disclaimer .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .usage-hero__inner {
    padding-right: 8%;
  }

  .page-disclaimer .rule-item {
    padding: 20px 24px;
  }

  .page-disclaimer .rule-item__text {
    max-width: 78ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .scope-card,
  .page-disclaimer .rule-item,
  .page-disclaimer .flow-list li,
  .page-disclaimer .scope-toc__list a,
  .page-disclaimer .usage-cta__links a {
    transition: none;
  }

  .page-disclaimer .scope-card:hover,
  .page-disclaimer .scope-card:focus-visible,
  .page-disclaimer .rule-item:hover,
  .page-disclaimer .scope-toc__list a:hover,
  .page-disclaimer .usage-cta__links a:hover {
    transform: none;
  }
}