/* ============================================================
   使用指引页 /usage/
   作用域：.page-disclaimer
   ============================================================ */

.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 4.5vw, 60px) clamp(56px, 8vw, 104px);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(46, 123, 255, 0.1) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(46, 123, 255, 0.1) 0 1px, transparent 1px 64px);
  mask-image: radial-gradient(120% 90% at 78% 0%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(120% 90% at 78% 0%, #000 0%, transparent 72%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 193, 78, 0.22) 0%, transparent 68%);
  pointer-events: none;
}

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

/* 面包屑（深色底适配） */
.page-disclaimer .usage-hero .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  list-style: none;
  font-size: var(--step-14);
}

.page-disclaimer .usage-hero .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-inline: 10px;
  color: rgba(237, 240, 250, 0.38);
}

.page-disclaimer .usage-hero .breadcrumb__link {
  color: var(--oninverse-muted);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-disclaimer .usage-hero .breadcrumb__link:hover,
.page-disclaimer .usage-hero .breadcrumb__link[aria-current="page"] {
  color: var(--gold);
}

/* 首屏标题与导语 */
.page-disclaimer .usage-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  max-width: min(100%, 16em);
  font-size: clamp(38px, 6.8vw, 76px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: #FFFFFF;
}

.page-disclaimer .usage-hero__lead {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 58ch;
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.72;
  color: var(--oninverse-muted);
}

.page-disclaimer .usage-hero__figure {
  margin: clamp(34px, 5vw, 60px) 0 0;
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid rgba(237, 240, 250, 0.16);
  object-fit: cover;
}

/* ============================================================
   条款区
   ============================================================ */

.page-disclaimer .usage-clauses {
  padding-block: clamp(56px, 8vw, 120px);
}

.page-disclaimer .usage-clauses__head {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-bottom: clamp(34px, 5vw, 62px);
}

.page-disclaimer .usage-clauses__head .section-head {
  margin: 0;
}

.page-disclaimer .usage-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.page-disclaimer .usage-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--text-strong);
  font-size: var(--step-14);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease),
    color 200ms var(--ease);
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  border-color: var(--gold);
  background: rgba(242, 193, 78, 0.16);
}

.page-disclaimer .usage-toc__link[aria-current="true"] {
  border-color: var(--gold);
  background: rgba(242, 193, 78, 0.16);
}

.page-disclaimer .usage-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--electric-ink);
}

.page-disclaimer .usage-clauses__list {
  display: grid;
  gap: clamp(20px, 2.8vw, 32px);
}

/* 单条条款 */
.page-disclaimer .clause {
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
  padding: clamp(24px, 3.2vw, 44px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-1);
  scroll-margin-top: calc(var(--top-h) + 24px);
  transition: box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}

.page-disclaimer .clause:hover {
  box-shadow: var(--shadow-2);
  border-color: rgba(46, 123, 255, 0.32);
}

.page-disclaimer .clause__no {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-navy);
}

.page-disclaimer .clause__no::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
}

.page-disclaimer .clause__title {
  margin: 0 0 14px;
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 800;
  line-height: 1.32;
  color: var(--text-strong);
}

.page-disclaimer .clause__body p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: var(--step-17);
  line-height: 1.75;
  color: var(--text-strong);
}

.page-disclaimer .clause__body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause__body .link {
  color: var(--electric-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 95, 217, 0.35);
  transition: border-color 240ms var(--ease), color 240ms var(--ease);
}

.page-disclaimer .clause__body .link:hover {
  color: var(--ink-navy);
  border-bottom-color: var(--gold);
}

/* 右侧旁注 */
.page-disclaimer .clause__side {
  padding: 16px 18px;
  background: var(--paper);
  border-left: 3px solid var(--electric);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
}

.page-disclaimer .clause__side-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.page-disclaimer .clause__side-text {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.72;
  color: var(--text-muted);
}

/* 费用条款：深蓝绿强调块 */
.page-disclaimer .clause--fee {
  background: var(--deep-teal);
  border-color: transparent;
}

.page-disclaimer .clause--fee:hover {
  border-color: rgba(242, 193, 78, 0.55);
}

.page-disclaimer .clause--fee .clause__no {
  color: var(--gold);
}

.page-disclaimer .clause--fee .clause__title {
  color: #FFFFFF;
}

.page-disclaimer .clause--fee .clause__body p {
  color: var(--oninverse);
}

.page-disclaimer .clause--fee .clause__body strong {
  color: var(--gold);
  font-weight: 700;
}

.page-disclaimer .clause--fee .clause__body .link {
  color: var(--gold);
  border-bottom-color: rgba(242, 193, 78, 0.4);
}

.page-disclaimer .clause--fee .clause__body .link:hover {
  color: #FFFFFF;
  border-bottom-color: #FFFFFF;
}

.page-disclaimer .clause--fee .clause__side {
  background: rgba(237, 240, 250, 0.09);
  border-left-color: var(--gold);
}

.page-disclaimer .clause--fee .clause__side-label {
  color: rgba(242, 193, 78, 0.85);
}

.page-disclaimer .clause--fee .clause__side-text {
  color: var(--oninverse-muted);
}

/* ============================================================
   联系方式面板
   ============================================================ */

.page-disclaimer .usage-contact {
  padding-block: clamp(52px, 7vw, 108px);
}

.page-disclaimer .usage-contact__panel {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
  padding: clamp(28px, 4vw, 56px);
  border-radius: var(--r-xl);
  background: var(--deep-indigo);
  color: var(--oninverse);
  box-shadow: var(--shadow-2);
}

.page-disclaimer .usage-contact__title {
  margin: 0 0 14px;
  font-size: clamp(23px, 2.8vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  color: #FFFFFF;
}

.page-disclaimer .usage-contact__note {
  margin: 0;
  max-width: 46ch;
  font-size: var(--step-14);
  line-height: 1.78;
  color: var(--oninverse-muted);
}

.page-disclaimer .usage-contact__rows {
  display: grid;
  align-content: start;
}

.page-disclaimer .usage-contact .contact-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid rgba(237, 240, 250, 0.15);
}

.page-disclaimer .usage-contact .contact-row__label {
  font-size: var(--step-14);
  color: var(--oninverse-muted);
}

.page-disclaimer .usage-contact .contact-row__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--step-14);
  color: var(--gold);
  word-break: break-word;
}

.page-disclaimer .usage-contact .contact-row__value--plain {
  color: var(--oninverse);
  word-break: break-word;
}

.page-disclaimer .usage-contact .contact-row__hours {
  font-family: var(--font-mono);
  font-size: var(--step-14);
  color: var(--oninverse);
}

.page-disclaimer .copy-btn {
  padding: 4px 13px;
  border: 1px solid rgba(242, 193, 78, 0.55);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--gold);
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.6;
  cursor: pointer;
  transition: background-color 200ms var(--ease), color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-disclaimer .copy-btn:hover,
.page-disclaimer .copy-btn:focus-visible {
  background: rgba(242, 193, 78, 0.18);
}

.page-disclaimer .copy-btn[data-copied="true"] {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink-navy);
}

.page-disclaimer .usage-contact__legal {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.04em;
  color: rgba(237, 240, 250, 0.55);
}

/* ============================================================
   响应式
   ============================================================ */

@media (min-width: 720px) {
  .page-disclaimer .usage-clauses__head {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-disclaimer .usage-contact .contact-row {
    grid-template-columns: 96px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-disclaimer .clause {
    grid-template-columns: 78px minmax(0, 1fr) 264px;
    align-items: start;
    gap: clamp(22px, 3vw, 42px);
  }

  .page-disclaimer .clause__no {
    position: sticky;
    top: calc(var(--top-h) + 32px);
  }

  .page-disclaimer .usage-contact__panel {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-disclaimer .clause {
    grid-template-columns: 88px minmax(0, 1fr) 300px;
  }
}

@media (max-width: 719px) {
  .page-disclaimer .usage-hero__lead {
    font-size: var(--step-17);
  }

  .page-disclaimer .clause__body p {
    font-size: var(--step-17);
  }

  .page-disclaimer .usage-toc__link {
    padding: 8px 13px;
    font-size: var(--step-12);
  }

  .page-disclaimer .usage-contact .contact-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .clause,
  .page-disclaimer .usage-toc__link,
  .page-disclaimer .copy-btn,
  .page-disclaimer .clause__body .link,
  .page-disclaimer .usage-hero .breadcrumb__link {
    transition: none;
  }
}
<<<END>>>