.page-disclaimer {
  --spec-line: rgba(232, 255, 249, 0.12);
  --spec-line-soft: rgba(232, 255, 249, 0.07);
  --spec-glow: rgba(52, 245, 208, 0.16);
  background: var(--c-ink);
  color: var(--c-paper);
  font-family: var(--font-body);
  padding-top: var(--bar-h);
  padding-left: 0;
  overflow-x: hidden;
}

@media (min-width: 900px) {
  .page-disclaimer {
    padding-left: var(--rail-w);
  }
}

.page-disclaimer h1,
.page-disclaimer h2,
.page-disclaimer h3,
.page-disclaimer p,
.page-disclaimer dl,
.page-disclaimer dd,
.page-disclaimer ol,
.page-disclaimer ul {
  margin: 0;
}

.page-disclaimer ol,
.page-disclaimer ul {
  list-style: none;
  padding: 0;
}

.page-disclaimer a {
  color: inherit;
  text-decoration: none;
}

.page-disclaimer a:hover {
  color: var(--c-cy);
}

.page-disclaimer a:focus-visible,
.page-disclaimer summary:focus-visible {
  outline: 2px solid var(--c-cy);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ---------- 首屏 ---------- */
.spec-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(24px, 5vw, 56px) var(--gutter) clamp(34px, 6vw, 76px);
  background: linear-gradient(175deg, var(--c-ink) 0%, var(--c-field) 62%, var(--c-ink) 100%);
  border-bottom: 1px solid var(--spec-line);
}

.spec-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.spec-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.spec-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 23, 19, 0.5) 0%, rgba(6, 23, 19, 0.9) 78%, var(--c-ink) 100%);
}

.spec-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
  max-width: var(--shell-max);
  margin: 0 auto;
}

.spec-hero__eyebrow {
  margin-bottom: 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-cy);
}

.spec-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(40px, 7.2vw, 80px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  margin-bottom: 18px;
}

.spec-hero__lede {
  max-width: 34em;
  font-size: clamp(15px, 2vw, 19px);
  line-height: 1.7;
  color: rgba(232, 255, 249, 0.8);
}

.spec-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.spec-hero__panel {
  padding: clamp(20px, 3.4vw, 30px);
  border: 1px solid rgba(52, 245, 208, 0.24);
  border-radius: var(--r-md);
  background: rgba(18, 59, 52, 0.72);
  backdrop-filter: blur(8px);
}

.spec-hero__panel-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.spec-hero__version {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(76px, 21vw, 132px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  margin: 6px 0 14px;
  background: linear-gradient(155deg, var(--c-cy) 12%, var(--c-orange) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--c-cy);
}

.spec-hero__panel-note {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 255, 249, 0.78);
  padding-bottom: 18px;
  border-bottom: 1px dashed rgba(52, 245, 208, 0.28);
}

.spec-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 16px;
  margin-top: 18px;
}

.spec-stats__item dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  margin-bottom: 4px;
}

.spec-stats__item dd {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  color: var(--c-paper);
}

/* ---------- 索引区 ---------- */
.spec-index {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 64px) var(--gutter) clamp(10px, 2vw, 20px);
}

.spec-index__grid {
  display: grid;
  gap: 16px;
}

.spec-index__panel {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--r-md);
  border: 1px solid var(--spec-line);
  background: var(--c-glass);
}

.spec-index__panel--versions {
  background: linear-gradient(150deg, rgba(42, 31, 77, 0.94), rgba(18, 59, 52, 0.7));
  border-color: rgba(52, 245, 208, 0.2);
}

.spec-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--c-paper);
  padding-bottom: 14px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--spec-line-soft);
}

.spec-index__head .mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}

.spec-index__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 2px;
  font-size: 15px;
  line-height: 1.5;
  color: rgba(232, 255, 249, 0.86);
  border-bottom: 1px solid var(--spec-line-soft);
  transition: color 180ms var(--ease), transform 180ms var(--ease);
}

.spec-index__list li:last-child .spec-index__link {
  border-bottom: 0;
}

.spec-index__link .mono {
  flex: none;
  min-width: 54px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.spec-index__link:hover,
.spec-index__link:focus-visible {
  transform: translateX(3px);
}

.spec-index__link:hover .mono {
  color: var(--c-cy);
}

.spec-index__list--versions .spec-index__link .mono {
  color: var(--c-gold);
  min-width: 46px;
}

/* ---------- 正文两栏 ---------- */
.spec-body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 30px) var(--gutter) clamp(48px, 8vw, 100px);
}

.spec-toc {
  padding: 18px 20px;
  border-left: 1px solid rgba(52, 245, 208, 0.3);
  background: linear-gradient(90deg, rgba(18, 59, 52, 0.55), rgba(18, 59, 52, 0));
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.spec-toc__title {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cy);
  margin-bottom: 12px;
}

.spec-toc__list {
  display: grid;
  gap: 2px;
}

.spec-toc__link {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(232, 255, 249, 0.74);
  border-bottom: 1px solid var(--spec-line-soft);
}

.spec-toc__link:hover,
.spec-toc__link:focus-visible {
  color: var(--c-cy);
}

.spec-toc__back {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}

@media (min-width: 1000px) {
  .spec-body {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }

  .spec-toc {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }
}

/* ---------- 条款 ---------- */
.spec-terms {
  min-width: 0;
}

.term {
  padding: clamp(22px, 3.6vw, 40px) 0;
  border-top: 1px solid var(--spec-line);
}

.term:first-child {
  border-top: 0;
  padding-top: 0;
}

.term__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.term__no {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}

.term__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.term__sub {
  margin: 26px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 20px);
  letter-spacing: 0.01em;
  color: var(--c-cy);
}

.term__body p {
  max-width: 46em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: rgba(232, 255, 249, 0.84);
  margin-bottom: 14px;
}

.term__body a {
  color: var(--c-cy);
  border-bottom: 1px solid rgba(52, 245, 208, 0.4);
}

.term__body a:hover {
  border-bottom-color: var(--c-cy);
}

.term__list {
  display: grid;
  gap: 10px;
  max-width: 46em;
  margin-bottom: 16px;
}

.term__list li {
  position: relative;
  padding-left: 20px;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: rgba(232, 255, 249, 0.82);
}

.term__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--c-cy);
}

.term__note {
  max-width: 46em;
  margin-top: 16px;
  padding-left: 14px;
  border-left: 2px solid rgba(255, 138, 61, 0.55);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 版本区块 ---------- */
.term--versions {
  margin-top: 8px;
  padding: clamp(22px, 3.6vw, 38px) clamp(16px, 3vw, 34px);
  border-top: 1px solid rgba(52, 245, 208, 0.24);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(42, 31, 77, 0.62) 0%, rgba(11, 42, 36, 0.72) 68%, rgba(6, 23, 19, 0.9) 100%);
}

.timeline {
  position: relative;
  margin-top: 16px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cy) 0%, rgba(255, 138, 61, 0.5) 100%);
}

.ver {
  position: relative;
  padding-left: 34px;
  margin-bottom: 8px;
}

.ver::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--c-field);
  border: 2px solid var(--c-orange);
}

.ver--current::before {
  border-color: var(--c-cy);
  box-shadow: 0 0 0 4px var(--spec-glow);
}

.ver__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px 10px 0;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--spec-line-soft);
}

.ver__head::-webkit-details-marker {
  display: none;
}

.ver__tag {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

.ver--current .ver__tag {
  color: var(--c-cy);
}

.ver__name {
  flex: 1 1 12em;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-paper);
}

.ver__chevron {
  flex: none;
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 1.5px solid var(--c-muted);
  border-bottom: 1.5px solid var(--c-muted);
  transform: rotate(45deg);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.ver[open] .ver__chevron {
  transform: rotate(225deg);
  border-color: var(--c-cy);
}

.ver__body {
  padding: 12px 0 16px;
}

.ver__body p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 255, 249, 0.8);
}

/* ---------- 联系面板 ---------- */
.term--contact .spec-contact {
  display: grid;
  gap: 1px;
  max-width: 46em;
  margin: 18px 0 18px;
  border: 1px solid rgba(255, 138, 61, 0.3);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(255, 138, 61, 0.16);
}

.spec-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 18px;
  background: var(--c-field);
}

.spec-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.spec-contact__row dd {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

.spec-contact__row dd.mono {
  font-size: 16px;
  color: var(--c-orange);
}

@media (min-width: 620px) {
  .spec-contact__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .spec-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .spec-toc__list {
    gap: 0;
  }

  .spec-toc__link {
    font-size: 14.5px;
  }
}

@media (min-width: 960px) {
  .spec-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
  }

  .spec-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .spec-index__link,
  .page-disclaimer .ver__chevron {
    transition: none;
  }

  .page-disclaimer .spec-index__link:hover,
  .page-disclaimer .spec-index__link:focus-visible {
    transform: none;
  }
}