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

.page-disclaimer {
  --u-line: var(--gray-200);
  background: var(--gray-050);
  color: var(--text-900);
  overflow-x: clip;
}

/* --- 顶部速查条 --- */
.page-disclaimer .usage-quickbar {
  position: sticky;
  top: var(--bar-h);
  z-index: 30;
  background: rgba(7, 12, 20, .95);
  border-bottom: 1px solid rgba(168, 201, 238, .22);
}

.page-disclaimer .usage-quickbar__inner {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 9px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-disclaimer .usage-quickbar__inner::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .usage-quickbar__lbl {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--blue-200);
  padding-right: 12px;
  margin-right: 4px;
  border-right: 1px solid rgba(168, 201, 238, .28);
}

.page-disclaimer .usage-quickbar__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  color: #c5d6ea;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-quickbar__link:hover,
.page-disclaimer .usage-quickbar__link:focus-visible {
  color: #fff;
  background: var(--blue-600);
  border-color: var(--blue-600);
}

.page-disclaimer .usage-quickbar__link--accent {
  color: var(--orange-100);
  border-color: rgba(255, 107, 53, .5);
}

.page-disclaimer .usage-quickbar__link--accent:hover,
.page-disclaimer .usage-quickbar__link--accent:focus-visible {
  color: #fff;
  background: var(--orange-500);
  border-color: var(--orange-500);
}

/* --- 首屏 --- */
.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-950);
  color: #fff;
  padding: 34px 0 46px;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(168, 201, 238, .07) 0 1px, transparent 1px 68px),
    repeating-linear-gradient(0deg, rgba(168, 201, 238, .05) 0 1px, transparent 1px 68px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), rgba(0, 0, 0, .2));
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), rgba(0, 0, 0, .2));
}

.page-disclaimer .usage-hero > .container {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(168, 201, 238, .9);
  margin-bottom: 20px;
}

.page-disclaimer .usage-hero .breadcrumb a {
  color: rgba(168, 201, 238, .9);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-hero .breadcrumb a:hover,
.page-disclaimer .usage-hero .breadcrumb a:focus-visible {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, .6);
}

.page-disclaimer .usage-hero .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--orange-500);
  margin-bottom: 10px;
}

.page-disclaimer .usage-hero h1 {
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -.01em;
  font-weight: 800;
  max-width: 20ch;
  margin: 0;
}

.page-disclaimer .usage-hero__lead {
  margin-top: 18px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: #b7c8de;
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-disclaimer .usage-hero__meta .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(168, 201, 238, .26);
  color: #cfe0f5;
}

.page-disclaimer .usage-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* --- 内容分区 --- */
.page-disclaimer .usage-section {
  padding: 42px 0;
}

.page-disclaimer .usage-section--paper {
  background: #fff;
  border-top: 1px solid var(--u-line);
  border-bottom: 1px solid var(--u-line);
}

.page-disclaimer .usage-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--u-line);
}

.page-disclaimer .usage-section__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--blue-600);
}

.page-disclaimer .usage-section h2 {
  font-size: clamp(20px, 4.8vw, 28px);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 0;
}

.page-disclaimer .usage-section p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-900);
  max-width: 68ch;
}

.page-disclaimer .usage-section p + p {
  margin-top: 12px;
}

.page-disclaimer .usage-section a {
  color: var(--blue-700);
  font-weight: 500;
  text-underline-offset: 4px;
  text-decoration-color: var(--blue-200);
  transition: color var(--dur) var(--ease), text-decoration-color var(--dur) var(--ease);
}

.page-disclaimer .usage-section a:hover,
.page-disclaimer .usage-section a:focus-visible {
  color: var(--blue-600);
  text-decoration-color: var(--blue-600);
}

.page-disclaimer .usage-inline {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--u-line);
  font-size: 15px;
  color: var(--gray-600);
}

/* --- 双栏 --- */
.page-disclaimer .usage-cols {
  display: grid;
  gap: 22px;
}

/* --- 提示块 --- */
.page-disclaimer .usage-note {
  background: var(--blue-050);
  border: 1px solid var(--blue-200);
  border-radius: var(--radius-m);
  padding: 18px 18px 16px;
}

.page-disclaimer .usage-note--plain {
  background: var(--gray-050);
  border-color: var(--u-line);
}

.page-disclaimer .usage-note__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-700);
  margin: 0 0 12px;
  letter-spacing: .01em;
}

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

.page-disclaimer .usage-note__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-900);
}

.page-disclaimer .usage-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-600);
}

.page-disclaimer .usage-note--plain .usage-note__list li::before {
  background: var(--gray-600);
}

.page-disclaimer .usage-note__foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(168, 201, 238, .6);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray-600);
}

/* --- 条款版本列表 --- */
.page-disclaimer .clause-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .clause-row {
  display: grid;
  gap: 10px;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--u-line);
  border-left: 3px solid var(--blue-600);
  border-radius: var(--radius-s);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-disclaimer .clause-row:hover {
  border-left-color: var(--orange-500);
  box-shadow: var(--shadow-1);
}

.page-disclaimer .clause-row__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray-600);
}

.page-disclaimer .clause-token {
  position: relative;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--blue-700);
  background: var(--blue-050);
  border: 1px solid var(--blue-200);
  border-radius: 999px;
  padding: 5px 13px;
  cursor: help;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-disclaimer .clause-token:hover,
.page-disclaimer .clause-token:focus-visible {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: #fff;
  outline: none;
}

.page-disclaimer .clause-token__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 9px);
  width: max-content;
  max-width: min(280px, 72vw);
  padding: 10px 13px;
  border-radius: 10px;
  background: var(--ink-950);
  color: #dbe7f5;
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.65;
  text-align: left;
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  pointer-events: none;
  z-index: 6;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease), visibility 180ms var(--ease);
}

.page-disclaimer .clause-token:hover .clause-token__tip,
.page-disclaimer .clause-token:focus-visible .clause-token__tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* --- 配图 --- */
.page-disclaimer .usage-figure {
  margin: 22px 0 0;
  border: 1px solid var(--u-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-950);
}

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

.page-disclaimer .usage-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--gray-600);
  background: var(--gray-050);
  border-top: 1px solid var(--u-line);
}

/* --- 升级步骤 --- */
.page-disclaimer .usage-steps {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
}

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

.page-disclaimer .usage-steps__check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-disclaimer .usage-steps__label {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--u-line);
  border-radius: var(--radius-m);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-disclaimer .usage-steps__label:hover {
  border-color: var(--blue-200);
}

.page-disclaimer .usage-steps__check:focus-visible + .usage-steps__label {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
}

.page-disclaimer .usage-steps__check:checked + .usage-steps__label {
  background: #f2fbf7;
  border-color: rgba(14, 124, 90, .35);
}

.page-disclaimer .usage-steps__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1.5px solid var(--blue-200);
  background: #fff;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-steps__mark::after {
  content: "";
  width: 12px;
  height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(1px, -2px) scale(.4);
  opacity: 0;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

.page-disclaimer .usage-steps__check:checked + .usage-steps__label .usage-steps__mark {
  background: var(--green-600);
  border-color: var(--green-600);
}

.page-disclaimer .usage-steps__check:checked + .usage-steps__label .usage-steps__mark::after {
  opacity: 1;
  transform: rotate(-45deg) translate(1px, -2px) scale(1);
}

.page-disclaimer .usage-steps__body {
  display: block;
}

.page-disclaimer .usage-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--blue-600);
  margin-bottom: 5px;
}

.page-disclaimer .usage-steps__title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-900);
}

.page-disclaimer .usage-steps__desc {
  display: block;
  margin-top: 5px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gray-600);
}

/* --- 警示条 --- */
.page-disclaimer .usage-alert {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--orange-100);
  border-left: 4px solid var(--orange-500);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-disclaimer .usage-alert__icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--orange-500);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

.page-disclaimer .usage-alert__body strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: #8a3413;
  margin-bottom: 6px;
}

.page-disclaimer .usage-alert__body p {
  font-size: 14.5px;
  line-height: 1.74;
  color: #6d2d13;
  max-width: 66ch;
}

/* --- 更新节奏卡 --- */
.page-disclaimer .usage-cadence {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-disclaimer .usage-cadence__item {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--u-line);
  border-radius: var(--radius-m);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-disclaimer .usage-cadence__item:hover {
  border-color: var(--blue-200);
  box-shadow: var(--shadow-1);
}

.page-disclaimer .usage-cadence__k {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--blue-600);
  background: var(--blue-050);
  border-radius: 999px;
  padding: 3px 10px;
}

.page-disclaimer .usage-cadence__v {
  display: block;
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-900);
}

.page-disclaimer .usage-cadence__d {
  font-size: 14px;
  line-height: 1.72;
  color: var(--gray-600);
  max-width: none;
}

/* --- 价格档位 --- */
.page-disclaimer .price-tiers {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-disclaimer .price-tier {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 13px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--u-line);
  font-size: 13.5px;
}

.page-disclaimer .price-tier__name {
  font-weight: 600;
  color: var(--text-900);
}

.page-disclaimer .price-tier__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--blue-700);
}

/* --- 纠错区块 --- */
.page-disclaimer .usage-report {
  display: grid;
  gap: 20px;
  margin-top: 22px;
  padding: 24px 20px;
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, var(--ink-950) 0%, var(--ink-800) 62%, var(--blue-700) 100%);
  color: #fff;
}

.page-disclaimer .usage-report__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--orange-500);
  margin-bottom: 10px;
}

.page-disclaimer .usage-report__text p {
  font-size: 15px;
  line-height: 1.78;
  color: #bdcde1;
  max-width: 52ch;
}

.page-disclaimer .usage-report__text .btn {
  margin-top: 16px;
}

.page-disclaimer .usage-report__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(168, 201, 238, .2);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-disclaimer .usage-report__list li {
  display: grid;
  gap: 4px;
  padding: 13px 16px;
  background: rgba(7, 12, 20, .55);
}

.page-disclaimer .usage-report__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--blue-200);
}

.page-disclaimer .usage-report__v {
  font-size: 14.5px;
  line-height: 1.6;
  color: #fff;
  word-break: break-word;
}

/* --- 平板及以上 --- */
@media (min-width: 720px) {
  .page-disclaimer .usage-section {
    padding: 54px 0;
  }

  .page-disclaimer .usage-hero {
    padding: 44px 0 58px;
  }

  .page-disclaimer .clause-row {
    grid-template-columns: 148px 1fr;
    align-items: center;
    gap: 20px;
    padding: 16px 18px;
  }

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

  .page-disclaimer .usage-report {
    padding: 32px 30px;
  }

  .page-disclaimer .usage-report__list {
    align-self: start;
  }
}

/* --- 桌面 --- */
@media (min-width: 960px) {
  .page-disclaimer .usage-cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
    align-items: start;
  }

  .page-disclaimer .usage-report {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    gap: 36px;
    padding: 38px 40px;
  }

  .page-disclaimer .usage-steps {
    gap: 12px;
  }

  .page-disclaimer .usage-steps__label {
    grid-template-columns: 28px 1fr;
    padding: 18px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .clause-token__tip,
  .page-disclaimer .usage-steps__mark,
  .page-disclaimer .usage-steps__mark::after {
    transition: none;
  }
}
</main>