.page-home {
  --home-dot: rgba(74, 112, 118, 0.55);
}

/* ---------- 首屏框景 ---------- */
.page-home .hero {
  position: relative;
  margin-top: 24px;
  padding: clamp(22px, 4vw, 44px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-home .hero::before,
.page-home .hero::after {
  content: "";
  position: absolute;
  inset: 8px;
  pointer-events: none;
  background-image:
    radial-gradient(circle, var(--home-dot) 1px, transparent 1.1px),
    radial-gradient(circle, var(--home-dot) 1px, transparent 1.1px);
  background-size: 16px 16px, 16px 16px;
  opacity: 0.45;
}

.page-home .hero::before {
  background-repeat: repeat-x, repeat-x;
  background-position: left top, left bottom;
}

.page-home .hero::after {
  background-repeat: repeat-y, repeat-y;
  background-position: left top, right top;
}

.page-home .hero .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: 18px;
}

.page-home .hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-home .hero__copy .label {
  margin: 0;
}

.page-home .hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
  max-width: 16em;
}

.page-home .hero__lead {
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 34em;
}

.page-home .hero__stats {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-home .hero__stats li {
  border-top: 2px solid var(--sand);
  padding-top: 12px;
}

.page-home .hero__num {
  display: inline-block;
  font-family: var(--font-num);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-deep);
}

.page-home .hero__unit {
  margin-left: 4px;
  font-size: 14px;
  color: var(--muted);
}

.page-home .hero__desc {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

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

.page-home .entry-btn {
  display: block;
  padding: 16px 18px;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-home .entry-btn--sand {
  background: var(--sand);
  color: var(--ink);
  border-color: var(--sand);
}

.page-home .entry-btn--cyan {
  background: transparent;
  border-color: var(--cyan-deep);
  color: var(--cyan-deep);
}

.page-home .entry-btn:hover,
.page-home .entry-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(42, 37, 32, 0.12);
}

.page-home .entry-btn__title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-home .entry-btn__hint {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-home .entry-btn--cyan .entry-btn__hint {
  color: var(--cyan-deep);
}

@media (hover: hover) and (min-width: 768px) {
  .page-home .entry-btn__hint {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    overflow: hidden;
    transition: max-height 0.24s ease, opacity 0.24s ease, margin-top 0.24s ease;
  }

  .page-home .entry-btn:hover .entry-btn__hint,
  .page-home .entry-btn:focus-visible .entry-btn__hint {
    max-height: 4em;
    opacity: 1;
    margin-top: 6px;
  }
}

.page-home .hero__visual {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--cyan-soft), var(--sand-soft));
}

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

/* ---------- 主体两栏与章节跟随 ---------- */
.page-home .home-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(28px, 4vw, 52px);
}

.page-home .home-toc {
  order: -1;
}

.page-home .home-toc .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-home .home-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-home .home-toc .toc__link {
  display: block;
  white-space: nowrap;
  padding: 6px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-home .home-toc .toc__link:hover {
  color: var(--cyan-deep);
}

.page-home .home-toc .toc__link[data-active="true"] {
  color: var(--ink);
  background: var(--sand-soft);
  border-bottom-color: var(--flame);
}

.page-home .home-block {
  scroll-margin-top: 88px;
  padding: clamp(26px, 3.6vw, 44px) 0;
  border-top: 1px solid var(--line);
}

.page-home .home-sections > .home-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-home .section-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-home .section-head__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
}

.page-home .section-head__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 图与图注 ---------- */
.page-home .home-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-home .home-figure img,
.page-home .collect__figure img,
.page-home .update-grid__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--sand-soft);
}

.page-home .figure__caption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 阶梯入口 ---------- */
.page-home .stairs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-home .stairs__item {
  border-radius: var(--radius);
  padding: 20px;
}

.page-home .stairs__item--one {
  background: var(--sand);
  color: var(--ink);
}

.page-home .stairs__item--two {
  background: transparent;
  border: 1.5px solid var(--cyan-deep);
}

.page-home .stairs__item--three {
  background: transparent;
  border: 0;
  border-top: 1px dashed var(--line-strong);
  border-radius: 0;
  padding-left: 0;
  padding-right: 0;
}

.page-home .stairs__step {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .stairs__item--one .stairs__step {
  color: rgba(42, 37, 32, 0.68);
}

.page-home .stairs__title {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.1vw, 23px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.page-home .stairs__item--two .stairs__title {
  color: var(--cyan-deep);
}

.page-home .stairs__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .stairs__item--two .stairs__text,
.page-home .stairs__item--three .stairs__text {
  color: var(--muted);
}

.page-home .stairs__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 2px solid currentColor;
  padding-bottom: 2px;
}

.page-home .stairs__item--one .stairs__link {
  color: var(--ink);
}

.page-home .stairs__link:hover,
.page-home .stairs__link:focus-visible {
  color: var(--flame);
}

/* ---------- 并排对照 ---------- */
.page-home .home-block--cyan {
  background: var(--cyan-soft);
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 40px) clamp(18px, 3vw, 34px);
  border-top: 1px solid var(--line);
}

.page-home .compare-grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-home .compare-grid__prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-home .compare-steps {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .compare-steps li::marker {
  font-family: var(--font-num);
  color: var(--cyan-deep);
  font-weight: 700;
}

.page-home .compare-steps strong {
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-home .compare-pair {
  display: grid;
  gap: 10px;
}

.page-home .compare-pair__side {
  padding: 16px;
  border-radius: var(--radius);
  background: var(--paper);
}

.page-home .compare-pair__side--old {
  border-left: 3px solid var(--cyan);
}

.page-home .compare-pair__side--new {
  border-left: 3px solid var(--flame);
}

.page-home .compare-pair__side p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .compare-cta {
  margin-top: 16px;
  width: 100%;
  text-align: center;
}

/* ---------- 收藏索引 ---------- */
.page-home .collect {
  position: relative;
}

.page-home .collect__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-home .collect__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-home .collect__filters label {
  cursor: pointer;
  font-size: 14px;
  line-height: 1.5;
  padding: 6px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  background: var(--paper);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-home .collect__filters label:hover {
  border-color: var(--cyan-deep);
  color: var(--cyan-deep);
}

.page-home #cf-all:checked ~ .collect__filters label[for="cf-all"],
.page-home #cf-return:checked ~ .collect__filters label[for="cf-return"],
.page-home #cf-new:checked ~ .collect__filters label[for="cf-new"],
.page-home #cf-long:checked ~ .collect__filters label[for="cf-long"] {
  background: var(--cyan-deep);
  border-color: var(--cyan-deep);
  color: #FFFFFF;
}

.page-home #cf-return:checked ~ .collect__body .index-item:not([data-aud~="return"]),
.page-home #cf-new:checked ~ .collect__body .index-item:not([data-aud~="new"]),
.page-home #cf-long:checked ~ .collect__body .index-item:not([data-aud~="long"]) {
  display: none;
}

.page-home .collect__radio:focus-visible ~ .collect__filters label {
  outline: 2px solid var(--flame);
  outline-offset: 2px;
}

.page-home .collect__body {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-home .collect__figure {
  margin: 0;
}

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

.page-home .index-item {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-home .index-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-home .index-item__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  text-decoration: none;
  color: var(--ink);
}

.page-home .index-item__no {
  flex: none;
  width: 24px;
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--flame);
}

.page-home .index-item__name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-home .index-item__link:hover .index-item__name,
.page-home .index-item__link:focus-visible .index-item__name {
  color: var(--cyan-deep);
  border-bottom-color: var(--cyan-deep);
}

.page-home .index-item__aud {
  flex: none;
  margin-left: auto;
  padding: 1px 9px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
}

.page-home .index-item__desc {
  margin: 4px 0 0 34px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 本季更新 ---------- */
.page-home .home-block--sand {
  background: var(--sand-soft);
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 40px) clamp(18px, 3vw, 34px);
  border-top: 1px solid var(--line);
}

.page-home .update-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-home .update-meta {
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-deep);
}

.page-home .update-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0 0 0 20px;
  border-left: 2px solid var(--cyan);
  display: grid;
  gap: 22px;
}

.page-home .update-item__no {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--flame);
  margin-bottom: 4px;
}

.page-home .update-item__title {
  margin: 0 0 6px;
  font-size: 18px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--ink);
}

.page-home .update-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .update-cta {
  display: inline-block;
}

.page-home .update-grid__figure {
  margin: 0;
  align-self: start;
}

/* ---------- 第一次来 ---------- */
.page-home .first-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-home .first-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-home .first-steps__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-home .first-steps__no {
  font-family: var(--font-num);
  font-size: 22px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--cyan);
}

.page-home .first-steps__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-home .first-steps__item strong {
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-home .first-callout {
  background: var(--sand-soft);
  border-radius: var(--radius);
  padding: 20px;
  border-left: 3px solid var(--sand);
}

.page-home .first-callout .callout__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-home .first-callout p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 页尾收藏提示 ---------- */
.page-home .save-strip {
  margin: 0 0 clamp(28px, 4vw, 48px);
  padding: 18px 20px;
  background: var(--cyan-soft);
  border-radius: var(--radius);
  border-left: 3px solid var(--cyan-deep);
}

.page-home .save-strip__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .save-strip__lead a {
  color: var(--cyan-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  margin-left: 4px;
}

.page-home .save-strip__lead a:hover {
  color: var(--flame);
}

.page-home .save-strip__more {
  margin-top: 12px;
}

.page-home .save-strip__more summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-deep);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-home .save-strip__more summary::-webkit-details-marker {
  display: none;
}

.page-home .save-strip__more summary::after {
  content: "▾";
  font-size: 12px;
  transition: transform 0.24s ease;
}

.page-home .save-strip__more[open] summary::after {
  transform: rotate(180deg);
}

.page-home .save-strip__more ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-home .hero__actions {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 640px) {
  .page-home .hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 768px) {
  .page-home .section-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(20px, 4vw, 40px);
    align-items: end;
  }

  .page-home .index-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 4vw, 44px);
  }

  .page-home .index-item:nth-child(1) {
    border-top: 1px solid var(--line);
  }

  .page-home .index-item:last-child {
    border-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-home .stairs__item--one {
    width: 100%;
  }

  .page-home .stairs__item--two {
    width: 84%;
  }

  .page-home .stairs__item--three {
    width: 66%;
  }

  .page-home .compare-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-home .collect__body {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-home .collect__figure {
    position: sticky;
    top: 32px;
  }

  .page-home .update-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-home .first-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-home .home-body {
    grid-template-columns: minmax(0, 1fr) 190px;
    align-items: start;
  }

  .page-home .home-toc {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 32px;
    order: 0;
  }

  .page-home .home-sections {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .page-home .home-toc .toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }

  .page-home .home-toc .toc__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius) var(--radius) 0;
    white-space: normal;
    padding: 7px 12px;
  }

  .page-home .home-toc .toc__link[data-active="true"] {
    border-left-color: var(--flame);
    border-bottom-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .entry-btn,
  .page-home .entry-btn__hint,
  .page-home .index-item__name,
  .page-home .save-strip__more summary::after,
  .page-home .home-toc .toc__link {
    transition: none;
  }
}
<<<END>>>