/* ============================================================
   首页 · 章节预览式内容流
   作用域：.page-home
   ============================================================ */

.page-home {
  --home-block: clamp(56px, 8.5vh, 100px);
  --home-gap: clamp(28px, 4.4vw, 52px);
  display: block;
  overflow-x: clip;
}

.page-home .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(22px, 3.4vh, 36px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

.page-home .crumbs__now {
  color: var(--cyan-500);
}

.page-home .crumbs__sep {
  opacity: 0.45;
}

/* ---------- 首屏 ---------- */

.page-home .hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(64px, 11vh, 118px) clamp(44px, 6.5vh, 76px);
  border-bottom: 1px solid var(--line);
}

.page-home .hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -12%;
  width: min(560px, 64vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(20, 224, 208, 0.15), rgba(6, 11, 24, 0) 62%);
  pointer-events: none;
  z-index: 0;
}

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

.page-home .hero__grid {
  display: grid;
  gap: clamp(32px, 5vw, 60px);
  align-items: end;
}

.page-home .hero__title {
  margin: clamp(14px, 2vh, 22px) 0 clamp(18px, 3vh, 26px);
  max-width: 17ch;
}

.page-home .hero__lede {
  max-width: 54ch;
  margin: 0 0 clamp(22px, 3.4vh, 34px);
}

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

.page-home .hero__meta {
  margin: clamp(22px, 3.2vh, 32px) 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

.page-home .media {
  overflow: hidden;
}

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

.page-home .hero__media {
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

/* ---------- 章节预览 ---------- */

.page-home .chapter {
  margin-top: clamp(46px, 7vh, 86px);
  padding-top: clamp(18px, 2.6vh, 26px);
  border-top: 1px solid var(--line);
}

.page-home .chapter__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
}

.page-home .chapter__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-home .chapter__item {
  border-bottom: 1px solid var(--line);
}

.page-home .chapter__link {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 6px;
  color: var(--ink);
  text-decoration: none;
  transition: background 0.3s var(--ease), padding-inline-start 0.3s var(--ease);
}

.page-home .chapter__link:hover,
.page-home .chapter__link:focus-visible {
  background: rgba(20, 224, 208, 0.08);
  padding-inline-start: 14px;
}

.page-home .chapter__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-500);
}

.page-home .chapter__name {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.page-home .chapter__note {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ---------- 通用分区 ---------- */

.page-home .band {
  padding-block: var(--home-block);
  border-bottom: 1px solid var(--line);
}

.page-home .band--last {
  border-bottom: 0;
}

.page-home .section-title {
  margin: clamp(12px, 2vh, 18px) 0 clamp(14px, 2.4vh, 22px);
  max-width: 24ch;
}

/* ---------- 资料库 ---------- */

.page-home .library__grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.page-home .library__media {
  border: 1px solid var(--line);
}

.page-home .facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: clamp(24px, 3.6vh, 36px);
  padding-top: clamp(20px, 3vh, 28px);
  border-top: 1px solid var(--line);
}

.page-home .fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--cyan-300);
}

.page-home .fact__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-dim);
}

.page-home .filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 3.8vh, 38px);
  border: 1px solid var(--line);
  background: var(--line);
}

.page-home .filter {
  padding: 16px 14px;
  background: var(--bg-soft);
}

.page-home .filter__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan-500);
}

.page-home .filter__v {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------- 产品线 ---------- */

.page-home .lines__intro {
  display: grid;
  gap: var(--home-gap);
  align-items: end;
  margin-bottom: clamp(28px, 4.4vh, 48px);
}

.page-home .lines__media {
  border: 1px solid var(--line);
}

.page-home .lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
}

.page-home .line-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: var(--glass);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease), box-shadow 0.32s var(--ease);
}

.page-home .line-card:hover,
.page-home .line-card:focus-visible {
  border-color: var(--cyan-500);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.page-home .line-card__top {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-home .line-card__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-500);
}

.page-home .line-card__name {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-home .line-card__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-home .line-card__more {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 0;
  margin-top: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
}

.page-home .line-card:hover .line-card__more,
.page-home .line-card:focus-visible .line-card__more,
.page-home .line-card:focus-within .line-card__more {
  max-height: 96px;
  margin-top: 8px;
  opacity: 1;
}

.page-home .lines__actions {
  margin: clamp(24px, 3.6vh, 34px) 0 0;
}

/* ---------- 发布记录 ---------- */

.page-home .releases__grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.page-home .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vh, 28px);
}

.page-home .releases__actions {
  margin: clamp(22px, 3.2vh, 30px) 0 0;
}

.page-home .releases__panel {
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  background: var(--glass);
  box-shadow: var(--shadow-soft);
}

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

.page-home .timeline__item {
  position: relative;
  margin-inline-start: 4px;
  padding: 0 0 26px 26px;
  border-inline-start: 1px solid var(--line);
}

.page-home .timeline__item:last-child {
  padding-bottom: 0;
  border-inline-start-color: transparent;
}

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  inset-inline-start: -4px;
  inset-block-start: 6px;
  width: 7px;
  height: 7px;
  background: var(--cyan-500);
  box-shadow: 0 0 0 4px rgba(20, 224, 208, 0.14);
}

.page-home .timeline__when {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-home .timeline__time {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

.page-home .timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-home .releases__media {
  margin-top: clamp(22px, 3.2vh, 30px);
  padding-top: clamp(18px, 2.6vh, 26px);
  border-top: 1px solid var(--line);
}

/* ---------- 三步上手（浅色分区） ---------- */

.page-home .steps {
  list-style: none;
  margin: clamp(28px, 4.4vh, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-home .step {
  position: relative;
  padding-top: 22px;
  border-top: 2px solid var(--cyan-500);
}

.page-home .step__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange-500);
}

.page-home .step__title {
  margin: 10px 0 8px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-home .step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-home .steps__note {
  margin: clamp(26px, 3.6vh, 36px) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dim);
  max-width: 62ch;
}

/* ---------- 服务与联系 ---------- */

.page-home .service__grid {
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}

.page-home .service__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(22px, 3.2vh, 32px) 0 0;
}

.page-home .service__facts {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-home .srv {
  display: grid;
  gap: 6px;
  padding: 18px;
  background: var(--bg-soft);
}

.page-home .srv__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan-500);
}

.page-home .srv__v {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-home .lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-home .chapter__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3.6vw, 56px);
  }

  .page-home .facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .srv {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-home .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-home .library__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-home .lines__intro {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-home .releases__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-home .service__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-home .lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .page-home .line-card__more {
    max-height: none;
    margin-top: 8px;
    opacity: 1;
    transition: none;
  }

  .page-home .hero__title {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .chapter__link,
  .page-home .line-card,
  .page-home .line-card__more {
    transition: none;
  }

  .page-home .line-card:hover,
  .page-home .line-card:focus-visible {
    transform: none;
  }
}