.page-home {
  --ph-cut: 20px;
  --ph-amber-ink: #9A5F12;
  --ph-paper-line: rgba(20, 26, 62, .16);
  display: block;
}

.page-home .og-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ============ 01 分类矩阵 ============ */

.page-home .ph-catalog {
  position: relative;
  overflow: hidden;
  padding-top: clamp(36px, 7vw, 76px);
  padding-bottom: clamp(40px, 7vw, 76px);
}

.page-home .ph-catalog__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .2;
  mix-blend-mode: screen;
}

.page-home .ph-catalog__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-home .ph-catalog__intro,
.page-home .ph-matrix__bar,
.page-home .ph-matrix,
.page-home .ph-index {
  position: relative;
  z-index: 1;
}

.page-home .ph-context {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--muted);
}

.page-home .ph-title {
  margin: 0 0 18px;
  max-width: 18ch;
  font-size: var(--fs-56);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: .02em;
  color: var(--ivory);
}

.page-home .ph-lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
}

.page-home .ph-catalog__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-home .ph-matrix__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(30px, 5vw, 50px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
}

.page-home .og-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-home .ph-matrix__count {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--muted);
}

.page-home .ph-matrix__count .og-num {
  color: var(--amber);
  font-size: var(--fs-14);
}

.page-home .ph-matrix {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-home .ph-matrix > li {
  min-width: 0;
}

.page-home .ph-matrix > li[hidden] {
  display: none;
}

.page-home .ph-cell__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: 18px 18px 20px;
  background:
    linear-gradient(140deg, rgba(69, 224, 230, .07), transparent 58%),
    var(--ink-2);
  border: 1px solid var(--hair);
  color: var(--ivory);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ph-cut)), calc(100% - var(--ph-cut)) 100%, 0 100%);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-home .ph-cell__link:hover,
.page-home .ph-cell__link:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.page-home .ph-cell__idx {
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--amber);
}

.page-home .ph-cell__name {
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: .02em;
}

.page-home .ph-cell__desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

.page-home .ph-cell__meta {
  margin-top: auto;
  padding-top: 10px;
  font-size: var(--fs-12);
  color: var(--haze);
  border-top: 1px solid var(--hair);
}

.page-home .ph-index {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: clamp(28px, 4vw, 42px);
  padding-top: 18px;
  border-top: 1px solid var(--hair);
}

.page-home .ph-index a {
  padding: 3px 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-home .ph-index a:hover,
.page-home .ph-index a[data-active="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ============ 章节通用头部 ============ */

.page-home .og-section {
  padding-top: clamp(46px, 8vw, 88px);
  padding-bottom: clamp(46px, 8vw, 88px);
}

.page-home .og-section__head {
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-home .og-section__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-home .og-section__title {
  margin: 8px 0 10px;
  font-size: var(--fs-40);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: .02em;
}

.page-home .og-section__lede {
  margin: 0;
  max-width: 50ch;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 02 四步路径 ============ */

.page-home .ph-path__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  counter-reset: none;
}

.page-home .ph-path__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
}

.page-home .ph-path__idx {
  font-size: var(--fs-12);
  letter-spacing: .2em;
  color: var(--amber);
}

.page-home .ph-path__name {
  margin: 0;
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--ivory);
}

.page-home .ph-path__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

.page-home .ph-path__time {
  margin-top: auto;
  padding-top: 10px;
  font-size: var(--fs-12);
  color: var(--cyan);
}

/* ============ 03 时间戳带 ============ */

.page-home .ph-stamps {
  background: linear-gradient(180deg, rgba(58, 58, 92, .38), transparent 72%);
}

.page-home .ph-stamps__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-home .ph-stamps__figure {
  margin: 0;
}

.page-home .ph-stamps__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--hair);
}

.page-home .ph-stamps__figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--muted);
}

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

.page-home .ph-stamp {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 4px 14px;
  margin-bottom: 10px;
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
  border-left: 2px solid var(--amber);
}

.page-home .ph-stamp:last-child {
  margin-bottom: 0;
}

.page-home .ph-stamp__k {
  font-size: var(--fs-14);
  letter-spacing: .12em;
  color: var(--muted);
}

.page-home .ph-stamp__v {
  font-size: var(--fs-20);
  color: var(--amber);
}

.page-home .ph-stamp__hint {
  grid-column: 1 / -1;
  font-size: var(--fs-12);
  color: var(--muted);
  opacity: .55;
  transform: translateY(2px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}

.page-home .ph-stamp:hover .ph-stamp__hint,
.page-home .ph-stamp:focus-within .ph-stamp__hint,
.page-home .ph-stamp:focus .ph-stamp__hint {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 04 资料入口 ============ */

.page-home .ph-dl__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-home .ph-dl__figure {
  margin: 0;
}

.page-home .ph-dl__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--hair);
}

.page-home .ph-dl__figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--muted);
}

.page-home .ph-dl__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-home .ph-dl__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
}

.page-home .ph-dl__ver {
  margin: 0;
  font-size: var(--fs-28);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber);
}

.page-home .ph-dl__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--muted);
}

.page-home .ph-dl__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

.page-home .og-copy {
  align-self: flex-start;
  margin-top: auto;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--hair);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-home .og-copy:hover,
.page-home .og-copy:focus-visible {
  border-color: var(--cyan);
}

.page-home .ph-dl__more {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

/* ============ 05 帮助文档（纸面） ============ */

.page-home .ph-docs {
  padding: clamp(44px, 7vw, 84px) 0;
  background: var(--paper);
  color: var(--ink-2);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.page-home .ph-docs__inner,
.page-home .ph-faq__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.page-home .ph-docs .og-section__title,
.page-home .ph-docs .og-section__lede {
  color: var(--ink-2);
}

.page-home .ph-docs .og-section__lede {
  color: #4A4E72;
}

.page-home .ph-docs .og-section__num {
  color: var(--ph-amber-ink);
}

.page-home .ph-docs__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-home .ph-docs__figure {
  margin: 0;
}

.page-home .ph-docs__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--paper-2);
}

.page-home .ph-docs__figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: #5C5F80;
}

.page-home .ph-docs__list {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--paper-2);
  border: 1px solid var(--paper-2);
}

.page-home .ph-docs__item {
  background: var(--paper);
}

.page-home .ph-docs__item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  font-size: var(--fs-14);
  color: var(--ink-2);
  text-decoration: none;
  transition: background-color .2s var(--ease);
}

.page-home .ph-docs__item a:hover,
.page-home .ph-docs__item a:focus-visible {
  background: rgba(69, 224, 230, .14);
}

.page-home .ph-docs__no {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--ph-amber-ink);
}

.page-home .ph-docs__name {
  flex: 1 1 auto;
}

.page-home .ph-docs__item .og-tag {
  flex: 0 0 auto;
  font-size: var(--fs-12);
  letter-spacing: .1em;
}

/* ============ 06 更新节奏 ============ */

.page-home .ph-rhythm__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-home .ph-rhythm__team,
.page-home .ph-rhythm__cadence {
  padding: 20px 18px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
}

.page-home .ph-rhythm__title {
  margin: 0 0 14px;
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--ivory);
}

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

.page-home .ph-rhythm__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--hair);
}

.page-home .ph-rhythm__list li:first-child {
  border-top: none;
}

.page-home .ph-rhythm__n {
  flex: 0 0 auto;
  font-size: var(--fs-20);
  color: var(--cyan);
}

.page-home .ph-rhythm__dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-home .ph-rhythm__dl dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--amber);
}

.page-home .ph-rhythm__dl dd {
  margin: 4px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 07 常见疑问（纸面） ============ */

.page-home .ph-faq {
  padding: clamp(44px, 7vw, 76px) 0;
  background: var(--paper-2);
  color: var(--ink-2);
}

.page-home .ph-faq .og-section__title,
.page-home .ph-faq .og-section__lede {
  color: var(--ink-2);
}

.page-home .ph-faq .og-section__lede {
  color: #4A4E72;
}

.page-home .ph-faq .og-section__num {
  color: var(--ph-amber-ink);
}

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

.page-home .ph-faq__item {
  border-top: 1px solid var(--ph-paper-line);
}

.page-home .ph-faq__item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  font-size: var(--fs-20);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-2);
  cursor: pointer;
  list-style: none;
}

.page-home .ph-faq__item summary::-webkit-details-marker {
  display: none;
}

.page-home .ph-faq__item summary::after {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--ph-amber-ink);
  content: "＋";
}

.page-home .ph-faq__item[open] summary::after {
  content: "－";
}

.page-home .ph-faq__item p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: #3C4066;
}

.page-home .ph-faq__item p a {
  color: var(--ph-amber-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-home .ph-faq__more {
  margin: 26px 0 0;
  font-size: var(--fs-14);
  color: #3C4066;
}

.page-home .ph-faq__more a {
  color: var(--ph-amber-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============ 响应式 ============ */

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

  .page-home .ph-dl__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .ph-docs__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .ph-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-home .ph-path__item {
    background: transparent;
    border: none;
    border-left: 1px solid var(--hair);
    padding: 4px 22px 8px;
  }

  .page-home .ph-path__item:first-child {
    border-left: none;
    padding-left: 0;
  }

  .page-home .ph-stamps__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-home .ph-dl__grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.6fr);
    align-items: start;
  }

  .page-home .ph-dl__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-home .ph-cell__link,
  .page-home .ph-stamp__hint,
  .page-home .ph-index a,
  .page-home .ph-docs__item a {
    transition: none;
  }

  .page-home .ph-cell__link:hover,
  .page-home .ph-cell__link:focus-visible {
    transform: none;
  }
}