.page-home {
  --home-shadow: 0 1px 0 rgba(15, 76, 69, .05), 0 20px 44px -34px rgba(15, 76, 69, .5);
  display: block;
  background: var(--snow);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  position: relative;
  padding: clamp(22px, 4vw, 46px) 0 clamp(52px, 8vw, 92px);
  overflow: hidden;
  background:
    radial-gradient(120% 88% at 88% 4%, rgba(46, 127, 163, .12), transparent 62%),
    radial-gradient(96% 72% at 4% 96%, rgba(143, 191, 106, .16), transparent 60%),
    var(--snow);
}

.page-home .hero__stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
}

.page-home .hero__vol {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-home .hero__title {
  margin: 0;
  font-family: var(--font-display);
}

.page-home .hero__brand {
  display: block;
  font-size: clamp(54px, 13.5vw, 118px);
  line-height: .96;
  letter-spacing: -.035em;
  font-weight: 700;
  color: var(--deep);
}

.page-home .hero__claim {
  display: block;
  margin-top: clamp(12px, 2vw, 20px);
  font-size: clamp(17px, 2.3vw, 26px);
  line-height: 1.44;
  font-weight: 500;
  color: var(--clay);
  max-width: 22ch;
  letter-spacing: .01em;
}

.page-home .hero__intro {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink);
}

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

.page-home .hero__collage {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  position: relative;
}

.page-home .hero__photo {
  grid-column: 1 / -1;
  position: relative;
  margin: 0;
  min-height: clamp(190px, 46vw, 260px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--home-shadow);
  background: var(--paper);
}

.page-home .hero__photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-home .hero__stamp {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--snow);
  background: rgba(15, 76, 69, .88);
  border-radius: 2px;
  text-decoration: none;
}

.page-home .hero__stamp:hover,
.page-home .hero__stamp:focus-visible {
  background: var(--clay);
}

.page-home .chip {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 13px 12px;
  background: var(--snow);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

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

.page-home .chip__num {
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--clay);
}

.page-home .chip__title {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  color: var(--deep);
  line-height: 1.3;
}

.page-home .chip__more {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  opacity: 0;
  transform: translateX(-5px);
  transition: opacity .22s ease, transform .22s ease, color .22s ease;
}

.page-home .chip:hover .chip__more,
.page-home .chip:focus-visible .chip__more {
  opacity: 1;
  transform: translateX(0);
  color: var(--clay);
}

.page-home .hero__line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: clamp(58px, 9vw, 130px);
  color: var(--line-strong);
  pointer-events: none;
}

/* ---------- 四季分区 ---------- */
.page-home .seasons {
  padding: clamp(46px, 7vw, 86px) 0;
  background: var(--snow);
}

.page-home .seasons__head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-home .seasons__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.28;
  color: var(--deep);
  font-weight: 700;
}

.page-home .seasons__note {
  margin: 14px 0 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--muted);
}

.page-home .season-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px;
  margin-bottom: clamp(20px, 3vw, 30px);
  border-radius: 2px;
  overflow: hidden;
}

.page-home .season-tabs__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 4px;
  font-family: var(--font-display);
  font-size: clamp(13px, 1.6vw, 17px);
  letter-spacing: .04em;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper);
  transition: filter .2s ease, transform .2s ease;
}

.page-home .season-tabs__item--spring { background: rgba(143, 191, 106, .44); }
.page-home .season-tabs__item--summer { background: rgba(46, 127, 163, .24); }
.page-home .season-tabs__item--autumn { background: rgba(201, 106, 43, .28); }
.page-home .season-tabs__item--winter { background: rgba(143, 166, 178, .38); }

.page-home .season-tabs__item:hover,
.page-home .season-tabs__item:focus-visible,
.page-home .season-tabs__item[aria-current="true"] {
  filter: brightness(.94);
  transform: translateY(-2px);
}

.page-home .season-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 26px);
}

.page-home .season {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--snow);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  scroll-margin-top: 92px;
}

.page-home .season::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--line-strong);
}

.page-home .season--spring::before { background: var(--spring); }
.page-home .season--summer::before { background: var(--summer); }
.page-home .season--autumn::before { background: var(--autumn); }
.page-home .season--winter::before { background: var(--winter); }

.page-home .season__num {
  position: absolute;
  top: 4px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 66px);
  line-height: 1;
  color: rgba(15, 76, 69, .09);
  letter-spacing: -.04em;
  pointer-events: none;
}

.page-home .season__tag {
  align-self: flex-start;
  margin: 0;
}

.page-home .season__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.35;
  color: var(--deep);
  font-weight: 700;
  max-width: 14ch;
}

.page-home .season__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .season__media {
  margin: 4px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-home .season__swatch {
  height: 104px;
  margin-top: 4px;
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(242, 201, 76, .55), transparent 62%),
    linear-gradient(135deg, rgba(201, 106, 43, .92), rgba(166, 58, 46, .78));
}

.page-home .season__link {
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
  transition: border-color .2s ease;
}

.page-home .season__link:hover,
.page-home .season__link:focus-visible {
  border-bottom-color: var(--clay);
}

/* ---------- 版本比对 ---------- */
.page-home .version {
  padding: clamp(46px, 7vw, 86px) 0;
  background:
    radial-gradient(110% 84% at 100% 0%, rgba(46, 127, 163, .12), transparent 62%),
    var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 92px;
}

.page-home .version__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 42px);
}

.page-home .version__main h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  color: var(--deep);
  font-weight: 700;
}

.page-home .version__lead {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--ink);
}

.page-home .version__steps {
  display: grid;
  gap: 4px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-home .version__steps li {
  padding: 13px 0 13px 16px;
  border-left: 2px solid rgba(184, 92, 56, .42);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-home .version__steps li strong {
  color: var(--deep);
  font-weight: 700;
}

.page-home .version__inner .btn {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-home .version__side {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--snow);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--home-shadow);
}

.page-home .version__side-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--clay);
}

.page-home .version__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-home .version__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-home .version__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--line-strong);
}

.page-home .version__side-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .version__side-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-home .version__side-link:hover,
.page-home .version__side-link:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 服务清单 ---------- */
.page-home .service {
  padding: clamp(46px, 7vw, 86px) 0;
  background: var(--snow);
  scroll-margin-top: 92px;
}

.page-home .service__head {
  max-width: 60ch;
}

.page-home .service__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  color: var(--deep);
  font-weight: 700;
}

.page-home .service__note {
  margin: 12px 0 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--muted);
}

.page-home .service__list {
  margin-top: clamp(20px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-home .service__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 10px;
  padding: 16px clamp(6px, 1.4vw, 14px);
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: background-color .2s ease;
}

.page-home .service__row:hover,
.page-home .service__row:focus-visible {
  background: var(--paper);
}

.page-home .service__idx {
  font-size: 11px;
  color: var(--clay);
  letter-spacing: .1em;
  padding-top: 3px;
}

.page-home .service__name {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 600;
  color: var(--deep);
}

.page-home .service__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .service__go {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--clay);
  white-space: nowrap;
}

.page-home .metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px clamp(14px, 2.4vw, 26px);
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--line);
}

.page-home .metrics__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-home .metrics__num {
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  color: var(--deep);
  letter-spacing: -.02em;
}

.page-home .metrics__num em {
  font-style: normal;
  color: var(--clay);
}

.page-home .metrics__label {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 资料库 ---------- */
.page-home .library {
  padding: clamp(46px, 7vw, 86px) 0;
  background:
    radial-gradient(90% 80% at 6% 0%, rgba(46, 127, 163, .28), transparent 58%),
    linear-gradient(160deg, var(--deep), var(--deep-2));
  color: var(--snow);
  scroll-margin-top: 92px;
}

.page-home .library__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: end;
}

.page-home .library__kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--summer-2);
}

.page-home .library__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  color: var(--snow);
  font-weight: 700;
  max-width: 20ch;
}

.page-home .library__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(247, 249, 247, .26);
}

.page-home .library__stat-num {
  font-size: clamp(26px, 3.2vw, 34px);
  line-height: 1;
  color: var(--summer-2);
}

.page-home .library__stat-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(247, 249, 247, .78);
}

.page-home .library__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: rgba(247, 249, 247, .86);
}

.page-home .doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-home .doc-card {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 11px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--snow);
  background: rgba(247, 249, 247, .07);
  border: 1px solid rgba(247, 249, 247, .18);
  border-radius: var(--radius);
}

.page-home .doc-card__idx {
  font-size: 10px;
  letter-spacing: .1em;
  color: rgba(247, 249, 247, .52);
}

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

.page-home .library__ghost {
  color: var(--snow);
  border-color: rgba(247, 249, 247, .48);
}

.page-home .library__ghost:hover,
.page-home .library__ghost:focus-visible {
  background: rgba(247, 249, 247, .12);
  color: var(--snow);
}

/* ---------- 更新机制 ---------- */
.page-home .updates {
  padding: clamp(46px, 7vw, 86px) 0;
  background: var(--snow);
}

.page-home .updates__head {
  max-width: 62ch;
}

.page-home .updates__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  color: var(--deep);
  font-weight: 700;
}

.page-home .updates__note {
  margin: 12px 0 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--muted);
}

.page-home .updates__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-home .updates__cell {
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--paper);
  border-left: 3px solid var(--line-strong);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-home .updates__cell:nth-child(1) { border-left-color: var(--spring); }
.page-home .updates__cell:nth-child(2) { border-left-color: var(--summer); }
.page-home .updates__cell:nth-child(3) { border-left-color: var(--autumn); }

.page-home .updates__num {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--clay);
}

.page-home .updates__cell h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  color: var(--deep);
  font-weight: 700;
}

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

.page-home .updates__recent {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line);
}

.page-home .updates__recent-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  color: var(--deep);
  font-weight: 600;
}

.page-home .updates__recent-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-home .updates__recent-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .updates__when {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--clay);
}

.page-home .updates__link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-home .updates__link:hover,
.page-home .updates__link:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 收束 ---------- */
.page-home .closing {
  padding: clamp(40px, 6vw, 72px) 0;
  background: linear-gradient(120deg, var(--deep), var(--deep-2));
  color: var(--snow);
}

.page-home .closing__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: center;
}

.page-home .closing__text h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.32;
  color: var(--snow);
  font-weight: 700;
}

.page-home .closing__text p {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 249, 247, .84);
}

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

.page-home .closing__ghost {
  color: var(--snow);
  border-color: rgba(247, 249, 247, .46);
}

.page-home .closing__ghost:hover,
.page-home .closing__ghost:focus-visible {
  background: rgba(247, 249, 247, .12);
  color: var(--snow);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-home .metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .updates__recent-list li {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-home .library__head {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
  }
}

@media (min-width: 900px) {
  .page-home .hero__stage {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: start;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-home .hero__collage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-areas:
      "photo photo a"
      "photo photo b"
      "c c d";
  }

  .page-home .hero__photo {
    grid-area: photo;
    min-height: 300px;
  }

  .page-home .chip--a { grid-area: a; }
  .page-home .chip--b { grid-area: b; }
  .page-home .chip--c { grid-area: c; }
  .page-home .chip--d { grid-area: d; }

  .page-home .chip__more {
    opacity: 1;
    transform: none;
  }

  .page-home .season-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
  }

  .page-home .season--spring { grid-column: 1 / span 5; }
  .page-home .season--summer { grid-column: 7 / span 6; margin-top: 52px; }
  .page-home .season--autumn { grid-column: 2 / span 4; margin-top: 30px; }
  .page-home .season--winter { grid-column: 7 / span 5; margin-top: -26px; }

  .page-home .version__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .75fr);
    align-items: start;
  }

  .page-home .service__row {
    grid-template-columns: 48px 190px minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 0 18px;
  }

  .page-home .service__desc,
  .page-home .service__go {
    grid-column: auto;
  }

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

  .page-home .closing__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr);
    justify-content: space-between;
  }

  .page-home .closing__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-home .season--spring .season__media {
    max-height: 300px;
  }

  .page-home .hero__photo {
    min-height: 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .chip,
  .page-home .chip__more,
  .page-home .season-tabs__item,
  .page-home .service__row,
  .page-home .season__link {
    transition: none;
  }

  .page-home .chip:hover,
  .page-home .chip:focus-visible,
  .page-home .season-tabs__item:hover,
  .page-home .season-tabs__item:focus-visible {
    transform: none;
  }
}