.page-home {
  --home-gap: clamp(16px, 3vw, 28px);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-home .hero-home {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(24px, 5vw, 56px) 0 clamp(44px, 7vw, 96px);
}

.page-home .hero-home::before {
  content: "";
  position: absolute;
  inset: -22% -12% auto -30%;
  height: 130%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 16% 28%, rgba(30, 79, 216, .45), transparent 70%),
    radial-gradient(44% 44% at 80% 10%, rgba(23, 195, 162, .20), transparent 72%),
    radial-gradient(38% 42% at 64% 84%, rgba(255, 91, 46, .18), transparent 74%);
  animation: home-drift 12s ease-in-out infinite alternate;
}

.page-home .hero-home::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(201, 212, 230, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 212, 230, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(80% 70% at 40% 30%, #000 10%, transparent 78%);
  mask-image: radial-gradient(80% 70% at 40% 30%, #000 10%, transparent 78%);
}

@keyframes home-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(2%, -2.5%, 0) scale(1.06); }
}

.page-home .hero-home__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 42px);
}

.page-home .hero-home__crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--bd-silver);
}

.page-home .hero-home__crumb a {
  color: var(--bd-silver);
  text-decoration: none;
}

.page-home .hero-home__crumb a:hover {
  color: var(--bd-blue-soft);
}

.page-home .hero-home__main .bd-display {
  margin: 14px 0 18px;
  max-width: 15ch;
}

.page-home .hero-home__main .bd-lede {
  max-width: 46ch;
}

.page-home .hero-home__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-home .hero-home__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--bd-line);
}

.page-home .hero-home__meta .bd-note {
  margin: 0;
}

.page-home .hero-home__media {
  position: relative;
  margin: 0;
  border-radius: var(--bd-r-lg);
  overflow: hidden;
  border: 1px solid var(--bd-line);
  background: linear-gradient(150deg, rgba(30, 79, 216, .38), rgba(8, 26, 56, .92));
}

.page-home .hero-home__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .hero-home__media .bd-media__caption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--bd-silver);
  border-top: 1px solid var(--bd-line);
}

.page-home .hero-home__rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-home .rail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-r-sm);
  background: rgba(11, 34, 71, .6);
  color: var(--bd-white);
  text-decoration: none;
  font-size: 14px;
  transition: border-color .3s var(--bd-ease), transform .3s var(--bd-ease), background-color .3s var(--bd-ease);
}

.page-home .rail-item:hover,
.page-home .rail-item:focus-visible {
  border-color: var(--bd-blue-soft);
  background: rgba(18, 48, 107, .85);
  transform: translateY(-2px);
}

.page-home .rail-item__num {
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--bd-blue-soft);
}

.page-home .rail-item__text {
  flex: 1 1 auto;
  min-width: 0;
  white-space: nowrap;
}

.page-home .rail-item__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bd-silver);
  opacity: .5;
}

.page-home .rail-item__dot--update {
  background: var(--bd-teal);
  opacity: 1;
}

.page-home .rail-item__dot--alert {
  background: var(--bd-orange);
  opacity: 1;
}

/* ---------- 通用小节标题 ---------- */
.page-home .section-head {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-home .section-head .bd-eyebrow {
  margin-bottom: 12px;
}

.page-home .section-head .bd-lede {
  margin-top: 14px;
}

/* ---------- 三栏索引展开板 ---------- */
.page-home .idx-board__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--home-gap);
}

.page-home .idx-card {
  position: relative;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 30px);
  transition: transform .35s var(--bd-ease), border-color .35s var(--bd-ease), box-shadow .35s var(--bd-ease);
}

.page-home .idx-card:hover,
.page-home .idx-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--bd-blue-soft);
  box-shadow: var(--bd-shadow);
}

.page-home .idx-card__num {
  margin: 0;
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--bd-teal);
}

.page-home .idx-card--b .idx-card__num {
  color: var(--bd-orange);
}

.page-home .idx-card--c .idx-card__num {
  color: var(--bd-amber);
}

.page-home .idx-card .bd-card__title {
  margin: 0;
}

.page-home .idx-card .bd-card__body {
  margin: 0;
  font-size: 15px;
  color: var(--bd-silver);
}

.page-home .idx-card__list {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-home .idx-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--bd-white);
}

.page-home .idx-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--bd-blue-soft);
}

.page-home .idx-card .bd-tag {
  justify-self: start;
}

.page-home .idx-card__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .45s var(--bd-ease), opacity .35s var(--bd-ease);
}

.page-home .idx-card:hover .idx-card__more,
.page-home .idx-card:focus-within .idx-card__more {
  max-height: 180px;
  opacity: 1;
}

.page-home .idx-card__more p {
  margin: 0;
  padding: 12px 14px;
  border-radius: var(--bd-r-sm);
  background: rgba(30, 79, 216, .16);
  font-size: 14px;
  color: var(--bd-white);
}

.page-home .idx-card .bd-card__foot {
  margin-top: 4px;
}

.page-home .idx-board__figure {
  margin: clamp(28px, 4vw, 48px) auto 0;
  max-width: 960px;
  border-radius: var(--bd-r-lg);
  overflow: hidden;
  border: 1px solid var(--bd-line);
  background: linear-gradient(160deg, rgba(18, 48, 107, .7), rgba(8, 26, 56, .95));
}

.page-home .idx-board__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .idx-board__figure .bd-media__caption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--bd-silver);
  border-top: 1px solid var(--bd-line);
}

/* ---------- 产品线与资料库 ---------- */
.page-home .lines {
  color: var(--bd-navy);
}

.page-home .lines .bd-eyebrow {
  color: var(--bd-blue);
}

.page-home .lines .bd-h2,
.page-home .lines .bd-h3 {
  color: var(--bd-navy);
}

.page-home .lines .bd-lede {
  color: rgba(8, 26, 56, .72);
}

.page-home .lines .bd-tabs__list {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-home .lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 42px);
}

.page-home .lines__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .lines__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(8, 26, 56, .14);
}

.page-home .lines__item:first-child {
  border-top: 1px solid rgba(8, 26, 56, .14);
}

.page-home .lines__num {
  flex: 0 0 auto;
  min-width: 24px;
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--bd-blue);
}

.page-home .lines__item > div {
  flex: 1 1 240px;
}

.page-home .lines__item .bd-h3 {
  margin: 0 0 4px;
  font-size: 18px;
  line-height: 1.4;
}

.page-home .lines__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(8, 26, 56, .68);
}

.page-home .lines__ver {
  flex: 0 0 auto;
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--bd-teal-ink);
  border: 1px solid rgba(23, 195, 162, .5);
  border-radius: var(--bd-r-pill);
  padding: 4px 10px;
}

.page-home .lines__figure {
  margin: 0;
  border-radius: var(--bd-r-lg);
  overflow: hidden;
  border: 1px solid rgba(8, 26, 56, .12);
  background: linear-gradient(150deg, rgba(30, 79, 216, .12), rgba(8, 26, 56, .06));
}

.page-home .lines__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.page-home .lines__figure .bd-media__caption {
  padding: 10px 16px;
  font-size: 13px;
  color: rgba(8, 26, 56, .62);
  border-top: 1px solid rgba(8, 26, 56, .1);
}

.page-home .lib-block {
  padding: clamp(20px, 2.6vw, 28px);
  border-radius: var(--bd-r);
  border: 1px solid rgba(8, 26, 56, .12);
  background: #fff;
}

.page-home .lib-block .bd-h3 {
  margin-top: 0;
}

.page-home .lib-block p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(8, 26, 56, .72);
}

.page-home .lib-block--aside {
  background: linear-gradient(150deg, rgba(30, 79, 216, .1), rgba(23, 195, 162, .08));
}

.page-home .lib-block .bd-note {
  color: rgba(8, 26, 56, .6);
}

.page-home .lib-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin: 20px 0 0;
}

.page-home .lib-stats dt {
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(8, 26, 56, .58);
  margin-bottom: 6px;
}

.page-home .lib-stats dd {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--bd-blue);
}

/* ---------- 注册与提交 ---------- */
.page-home .help-home__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-home .help-home__intro .bd-eyebrow {
  margin-bottom: 12px;
}

.page-home .help-home__intro p {
  color: var(--bd-silver);
  max-width: 42ch;
}

.page-home .help-home__intro .bd-btn {
  margin-top: 20px;
}

.page-home .help-home__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-home .help-home__steps li {
  position: relative;
  padding: 18px 20px 18px 26px;
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-r);
  background: rgba(11, 34, 71, .55);
  overflow: hidden;
}

.page-home .help-home__steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--bd-blue-soft), var(--bd-teal));
}

.page-home .step__num {
  display: inline-block;
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--bd-teal);
  margin-bottom: 6px;
}

.page-home .help-home__steps .bd-h3 {
  margin: 0 0 6px;
  font-size: 19px;
}

.page-home .help-home__steps p {
  margin: 0;
  font-size: 15px;
  color: var(--bd-silver);
}

/* ---------- 维护节奏 ---------- */
.page-home .cadence__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-home .cadence__figure {
  margin: 0;
  border-radius: var(--bd-r-lg);
  overflow: hidden;
  border: 1px solid var(--bd-line);
  background: radial-gradient(70% 70% at 50% 40%, rgba(23, 195, 162, .18), rgba(8, 26, 56, .95));
}

.page-home .cadence__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.page-home .cadence__figure .bd-media__caption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--bd-silver);
  border-top: 1px solid var(--bd-line);
}

.page-home .cadence__body p {
  color: var(--bd-silver);
  max-width: 46ch;
}

.page-home .cadence__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-home .cadence__stats > div {
  padding: 14px 16px;
  border-radius: var(--bd-r-sm);
  border: 1px solid var(--bd-line);
  background: rgba(18, 48, 107, .35);
}

.page-home .cadence__stats dt {
  font-family: var(--bd-font-index);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--bd-blue-soft);
  margin-bottom: 6px;
}

.page-home .cadence__stats dd {
  margin: 0;
  font-size: 15px;
  color: var(--bd-white);
}

/* ---------- 联系 ---------- */
.page-home .contact-home__card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(20px, 3vw, 44px);
  padding: clamp(26px, 4vw, 52px);
  border-radius: var(--bd-r-lg);
  border: 1px solid var(--bd-line-strong);
  background:
    radial-gradient(60% 130% at 92% 8%, rgba(255, 91, 46, .24), transparent 70%),
    linear-gradient(120deg, rgba(30, 79, 216, .3), rgba(8, 26, 56, .95) 58%);
}

.page-home .contact-home__body {
  flex: 1 1 320px;
}

.page-home .contact-home__body .bd-eyebrow {
  margin-bottom: 12px;
}

.page-home .contact-home__body p {
  margin: 14px 0 0;
  max-width: 52ch;
  color: var(--bd-silver);
}

.page-home .contact-home__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-home .help-home__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .hero-home__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr) minmax(158px, 190px);
    align-items: start;
    gap: clamp(24px, 3.2vw, 40px);
  }

  .page-home .hero-home__main {
    padding-top: clamp(8px, 2vw, 28px);
  }

  .page-home .hero-home__media {
    margin-top: 10px;
    border-radius: 0;
    clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
    border: none;
  }

  .page-home .hero-home__rail {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: clamp(14px, 3vw, 44px);
  }

  .page-home .lines__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-home .lines__figure {
    position: sticky;
    top: calc(var(--bd-header-h) + 24px);
  }

  .page-home .help-home__grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-home .cadence__grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  }
}

@media (min-width: 1024px) {
  .page-home .idx-board__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-home .idx-card--a {
    grid-column: span 5;
  }

  .page-home .idx-card--b {
    grid-column: span 4;
    margin-top: 34px;
  }

  .page-home .idx-card--c {
    grid-column: span 3;
    margin-top: 68px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hero-home::before {
    animation: none;
  }

  .page-home .rail-item,
  .page-home .idx-card,
  .page-home .idx-card__more {
    transition: none;
  }

  .page-home .idx-card:hover,
  .page-home .idx-card:focus-within,
  .page-home .rail-item:hover,
  .page-home .rail-item:focus-visible {
    transform: none;
  }
}