.page-disclaimer {
  --pd-pad: clamp(16px, 3.2vw, 34px);
  --pd-shadow: 7px 7px 0 rgba(2, 6, 20, 0.55);
  --pd-line: var(--ink-700);
  --pd-panel: var(--ink-800);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3.5vw, 38px) clamp(28px, 5vw, 54px);
  border-bottom: 2px solid var(--pd-line);
  background:
    radial-gradient(120% 95% at 102% -10%, rgba(40, 225, 255, 0.20), transparent 58%),
    radial-gradient(95% 85% at -6% 110%, rgba(255, 123, 46, 0.16), transparent 62%),
    var(--ink-900);
}
.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(143, 163, 196, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 196, 0.07) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.page-disclaimer .usage-hero .wrap {
  position: relative;
  z-index: 1;
}
.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 8.2vw, 4.3rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
  color: var(--ice);
  margin: 18px 0 0;
  max-width: 17ch;
}
.page-disclaimer .usage-hero__title em {
  font-style: normal;
  color: var(--cyan);
}
.page-disclaimer .usage-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}
.page-disclaimer .hero-facts {
  list-style: none;
  margin: clamp(22px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px 22px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.page-disclaimer .fact {
  border-left: 2px solid var(--cyan);
  padding-left: 12px;
}
.page-disclaimer .fact__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
  text-transform: uppercase;
}
.page-disclaimer .fact__v {
  display: block;
  margin-top: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ice);
}

/* ---------- 步骤导航 ---------- */
.page-disclaimer .step-nav {
  display: flex;
  overflow-x: auto;
  margin-top: clamp(24px, 4vw, 44px);
  border: 2px solid var(--pd-line);
  background: var(--ink-900);
  scrollbar-width: thin;
}
.page-disclaimer .step-nav__item {
  flex: 1 0 auto;
  min-width: 116px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-right: 2px solid var(--pd-line);
  text-decoration: none;
  color: var(--mist);
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}
.page-disclaimer .step-nav__item:last-child {
  border-right: none;
}
.page-disclaimer .step-nav__item:hover,
.page-disclaimer .step-nav__item:focus-visible {
  background: var(--pd-panel);
  color: var(--ice);
  box-shadow: inset 0 -3px 0 var(--cyan);
}
.page-disclaimer .step-nav__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.page-disclaimer .step-nav__label {
  font-size: 14px;
  font-weight: 600;
}

/* ---------- 步骤卡片 ---------- */
.page-disclaimer .step-flow {
  margin-top: clamp(26px, 4vw, 44px);
}
.page-disclaimer .step-card {
  display: grid;
  gap: 0;
  margin-bottom: clamp(18px, 3vw, 28px);
  background: var(--pd-panel);
  border: 2px solid var(--pd-line);
  box-shadow: var(--pd-shadow);
  scroll-margin-top: 24px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.page-disclaimer .step-card:hover {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
}
.page-disclaimer .step-card__visual {
  position: relative;
  min-height: 132px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 16px 18px;
  overflow: hidden;
  border-bottom: 2px solid var(--pd-line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(40, 225, 255, 0.22), transparent 60%),
    linear-gradient(140deg, #0C1A3E 0%, #050B1F 72%);
}
.page-disclaimer .step-card__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(143, 163, 196, 0.10) 0 1px,
    transparent 1px 13px
  );
  pointer-events: none;
}
.page-disclaimer .step-card__num {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(52px, 13vw, 92px);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 2px rgba(40, 225, 255, 0.75);
  letter-spacing: 0.02em;
}
.page-disclaimer .step-card__tag {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-900);
  background: var(--orange);
  padding: 4px 9px;
  border-radius: var(--radius);
}
.page-disclaimer .step-card__body {
  padding: clamp(18px, 3vw, 28px);
}
.page-disclaimer .step-card__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}
.page-disclaimer .step-card__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.15;
  color: var(--ice);
}
.page-disclaimer .step-card__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}
.page-disclaimer .step-card__body p:last-child {
  margin-bottom: 0;
}
.page-disclaimer .step-card--media .step-card__visual--media {
  padding: 0;
  min-height: 0;
  display: block;
  background: var(--ink-900);
}
.page-disclaimer .step-card--media .step-card__visual--media::after {
  display: none;
}
.page-disclaimer .step-card--media .media {
  border: none;
  border-radius: 0;
}

/* ---------- 联系条 ---------- */
.page-disclaimer .contact-strip {
  margin-top: 18px;
  border: 2px solid var(--pd-line);
  background: var(--ink-900);
  padding: 14px 16px;
}
.page-disclaimer .contact-strip__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 10px !important;
  font-size: 14px !important;
}
.page-disclaimer .contact-strip__row:last-child {
  margin-bottom: 0 !important;
}
.page-disclaimer .contact-strip__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
}
.page-disclaimer .contact-strip__v {
  color: var(--ice);
  word-break: break-all;
}

/* ---------- 通用小节头 ---------- */
.page-disclaimer .pd-section {
  padding-block: clamp(34px, 6vw, 66px);
  border-top: 2px solid var(--pd-line);
}
.page-disclaimer .pd-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 22px);
}
.page-disclaimer .pd-head .sec-num {
  font-size: clamp(38px, 8vw, 66px);
  line-height: 0.8;
}
.page-disclaimer .pd-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
  text-transform: uppercase;
}
.page-disclaimer .pd-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.12;
  color: var(--ice);
}
.page-disclaimer .pd-lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 自查清单 ---------- */
.page-disclaimer .check-list {
  list-style: none;
  margin: clamp(20px, 3.5vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-disclaimer .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--pd-line);
  background: var(--pd-panel);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}
.page-disclaimer .check-item:hover {
  border-color: var(--cyan);
}
.page-disclaimer .check-item__box {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--cyan);
}
.page-disclaimer .check-item__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice);
}
.page-disclaimer .check-item:has(.check-item__box:checked) {
  border-color: var(--green);
  background: rgba(53, 224, 138, 0.07);
}

/* ---------- 时间轴 ---------- */
.page-disclaimer .timeline {
  list-style: none;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 0 0 0 30px;
  position: relative;
}
.page-disclaimer .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--orange) 78%, var(--amber));
}
.page-disclaimer .tl-item {
  position: relative;
  padding-bottom: clamp(20px, 3.6vw, 30px);
}
.page-disclaimer .tl-item:last-child {
  padding-bottom: 0;
}
.page-disclaimer .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}
.page-disclaimer .tl-time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
}
.page-disclaimer .tl-title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  color: var(--ice);
}
.page-disclaimer .tl-text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 回到顶部 ---------- */
.page-disclaimer .back-top {
  padding-block: clamp(26px, 4vw, 46px) clamp(40px, 6vw, 72px);
  display: flex;
  justify-content: flex-end;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-disclaimer .step-card {
    grid-template-columns: 5fr 7fr;
    align-items: stretch;
  }
  .page-disclaimer .step-card--flip {
    grid-template-columns: 7fr 5fr;
  }
  .page-disclaimer .step-card--flip .step-card__visual {
    order: 2;
  }
  .page-disclaimer .step-card__visual {
    min-height: 100%;
    border-bottom: none;
    border-right: 2px solid var(--pd-line);
  }
  .page-disclaimer .step-card--flip .step-card__visual {
    border-right: none;
    border-left: 2px solid var(--pd-line);
  }
  .page-disclaimer .step-card__num {
    font-size: clamp(72px, 8vw, 108px);
  }
  .page-disclaimer .step-card--media {
    grid-template-columns: 1fr;
  }
  .page-disclaimer .step-card--media .step-card__visual--media {
    border-right: none;
    border-bottom: 2px solid var(--pd-line);
  }
  .page-disclaimer .step-card__body {
    padding: clamp(24px, 3.4vw, 40px);
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .step-card {
    grid-template-columns: 4fr 8fr;
  }
  .page-disclaimer .step-card--flip {
    grid-template-columns: 8fr 4fr;
  }
}