.page-disclaimer {
  --step-num-w: 76px;
  --panel-pad: clamp(16px, 3vw, 24px);
  background: var(--c-void);
  color: var(--c-cream);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-disclaimer .num {
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-disclaimer h1 {
  margin: 14px 0 18px;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-disclaimer .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 4px;
  font-size: 13px;
  color: var(--c-stone);
}

.page-disclaimer .eyebrow {
  color: var(--c-orange);
  letter-spacing: 0.2em;
  font-size: 11px;
  text-transform: uppercase;
}

/* 首屏 */
.usage-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(20px, 5vw, 40px) 0 clamp(30px, 5vw, 52px);
}

.usage-hero::before,
.usage-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  pointer-events: none;
  filter: blur(4px);
}

.usage-hero::before {
  inset: -34% 34% auto -18%;
  height: 360px;
  background: radial-gradient(ellipse at 42% 42%, rgba(255, 106, 26, 0.18), transparent 66%);
}

.usage-hero::after {
  inset: auto -14% -32% 46%;
  height: 320px;
  background: radial-gradient(ellipse at 60% 50%, rgba(37, 230, 214, 0.14), transparent 68%);
}

.usage-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.usage-hero__lede {
  max-width: 60ch;
  margin: 0;
  color: var(--c-silver);
  font-size: clamp(1rem, 1.6vw, 1.06rem);
  line-height: 1.8;
}

.usage-hero__meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

.usage-hero__meta .num {
  color: var(--c-orange);
  font-size: 14px;
}

.hero-panel {
  display: grid;
  gap: 4px;
  padding: var(--panel-pad);
  border: 1px solid var(--line-glass);
  border-radius: var(--radius-card);
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.hero-panel__block {
  display: grid;
  gap: 10px;
  padding-block: 12px;
}

.hero-panel__block + .hero-panel__block {
  border-top: 1px solid var(--line-soft);
}

.hero-panel__key {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.round-strip {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.round-chip {
  flex: none;
  padding: 6px 10px;
  border: 1px solid var(--line-mid);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-silver);
}

.round-chip.is-active {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-void);
}

.round-chip--ghost {
  border-style: dashed;
  color: var(--c-stone);
}

.mini-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* 快速跳转条 */
.quick-jump {
  border-block: 1px solid var(--line-soft);
  background: var(--glass-solid);
}

.quick-jump__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-block: 12px;
}

.quick-jump__key {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-stone);
}

.quick-jump__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.quick-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--c-silver);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.quick-jump__link .num {
  font-size: 11px;
  color: var(--c-cyan);
}

.quick-jump__link:hover,
.quick-jump__link:focus-visible {
  color: var(--c-cream);
  border-color: var(--c-orange);
  background: rgba(255, 106, 26, 0.12);
}

/* 步骤流 */
.steps {
  padding: clamp(24px, 4vw, 46px) 0 clamp(8px, 2vw, 18px);
}

.step {
  position: relative;
  display: grid;
  gap: 14px;
  padding-block: clamp(26px, 4vw, 42px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 120px;
  transition: background-color 0.24s var(--ease);
}

.step:first-of-type {
  border-top: none;
}

.step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-stone);
  transition: color 0.2s var(--ease), -webkit-text-stroke-color 0.2s var(--ease);
}

.step:target {
  background: linear-gradient(90deg, rgba(255, 106, 26, 0.09), transparent 62%);
}

.step:target .step__num,
.step:focus-within .step__num {
  -webkit-text-stroke-color: var(--c-orange);
  color: var(--c-orange-soft);
}

.step__title {
  margin: 0 0 12px;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.step__body > p {
  max-width: 66ch;
  margin: 0 0 14px;
  color: var(--c-silver);
  font-size: 1rem;
  line-height: 1.8;
}

.step__body .num {
  color: var(--c-orange-soft);
  font-size: 0.95em;
}

.inline-link {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.inline-link:hover {
  color: var(--c-cream);
}

/* 四步顺序清单 */
.order-list {
  counter-reset: order;
  display: grid;
  gap: 10px;
  margin: 18px 0 16px;
  padding: 0;
  list-style: none;
}

.order-list li {
  position: relative;
  counter-increment: order;
  padding: 13px 15px 13px 50px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background: var(--c-night);
  color: var(--c-silver);
  font-size: 0.96rem;
  line-height: 1.75;
}

.order-list li::before {
  content: counter(order, decimal-leading-zero);
  position: absolute;
  left: 15px;
  top: 14px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

.order-list strong {
  color: var(--c-cream);
}

/* 图 */
.usage-figure {
  margin: 22px 0 6px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--c-night);
}

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

.usage-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-stone);
}

/* 主客场色卡 */
.swatch-row {
  display: grid;
  gap: 12px;
  margin: 20px 0 6px;
}

.swatch {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 30px 18px 16px;
  border-radius: 120px 120px var(--radius-card) var(--radius-card);
  color: var(--c-void);
  outline: none;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.swatch--home {
  background: linear-gradient(180deg, var(--c-orange-soft) 0%, var(--c-orange) 84%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.swatch--away {
  background: linear-gradient(180deg, var(--c-cyan) 0%, var(--c-cyan-deep) 90%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.swatch:hover,
.swatch:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 26px rgba(6, 10, 18, 0.6);
}

.swatch__role {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.swatch__hex {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

.swatch__note {
  font-size: 12.5px;
  line-height: 1.6;
  opacity: 0.92;
}

/* 集锦角标示意 */
.clip-demo {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  max-width: 420px;
  margin: 20px 0 8px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-card);
  background: repeating-linear-gradient(135deg, #0b1320 0 14px, #101b2c 14px 28px);
  overflow: hidden;
}

.clip-demo__badge {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 4px 8px;
  border-radius: 3px;
  background: var(--c-orange);
  color: var(--c-void);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.clip-demo__hint {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-stone);
  text-align: center;
  padding: 0 16px;
}

.clip-demo__caption {
  margin: 0 0 16px;
  font-size: 12.5px;
  color: var(--c-stone);
}

/* 联系信息块 */
.contact-lite {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 16px 18px;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background: var(--c-night);
}

.contact-lite li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.contact-lite__key {
  flex: none;
  min-width: 46px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.contact-lite__val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-cream);
  word-break: break-all;
}

.contact-lite .copy-btn {
  margin-left: auto;
}

/* 后续入口 */
.next-steps {
  padding: clamp(26px, 4vw, 48px) 0 clamp(40px, 6vw, 80px);
}

.next-steps__title {
  margin: 0 0 10px;
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
  color: var(--c-cream);
}

.next-steps__note {
  max-width: 56ch;
  margin: 0 0 22px;
  color: var(--c-stone);
  font-size: 0.95rem;
  line-height: 1.75;
}

.next-grid {
  display: grid;
  gap: 12px;
}

.next-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background: var(--c-carbon);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.next-card:hover,
.next-card:focus-visible {
  border-color: var(--c-cyan);
  transform: translateY(-3px);
}

.next-card__key {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.next-card__title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-cream);
}

.next-card__go {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-orange);
}

@media (min-width: 560px) {
  .swatch-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 720px) {
  .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .step {
    grid-template-columns: var(--step-num-w) minmax(0, 1fr);
    column-gap: clamp(20px, 4vw, 48px);
    align-items: start;
  }

  .step__num {
    position: sticky;
    top: 110px;
  }
}

@media (min-width: 940px) {
  .usage-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}