.page-home {
  background: var(--paper-100);
  color: var(--ink-900);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  overflow-x: hidden;
}

.page-home h1,
.page-home h2,
.page-home h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0;
}

.page-home p {
  margin: 0 0 1rem;
}

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

.page-home ul,
.page-home ol,
.page-home dl {
  margin: 0;
  padding: 0;
}

/* ---------- 首屏 ---------- */

.page-home .hero {
  position: relative;
  background: var(--indigo-950);
  color: var(--paper-100);
  overflow: hidden;
}

.page-home .hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -20%;
  width: 74%;
  height: 140%;
  background: linear-gradient(142deg, rgba(200, 162, 74, 0.20), rgba(47, 212, 198, 0.10) 54%, transparent 80%);
  transform: skewY(-9deg);
  pointer-events: none;
}

.page-home .hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sand-500) 28%, var(--cyan-400) 72%, transparent);
  opacity: 0.72;
}

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

.page-home .hero__grid {
  display: grid;
  gap: clamp(2rem, 6vw, 3.4rem);
  align-items: center;
  padding-top: clamp(2.6rem, 7vw, 5rem);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
}

.page-home .hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--sand-500);
  text-transform: none;
  margin: 0 0 0.9rem;
}

.page-home .hero h1 {
  font-size: clamp(1.95rem, 6.2vw, 3.2rem);
  color: #fff;
  max-width: 20ch;
}

.page-home .hero__lede {
  margin-top: clamp(1rem, 3vw, 1.5rem);
  max-width: 44ch;
  font-size: clamp(1rem, 2.1vw, 1.08rem);
  line-height: 1.95;
  color: var(--on-dark);
}

.page-home .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(1.4rem, 4vw, 2rem);
}

.page-home .hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 5vw, 2.6rem);
  list-style: none;
  margin-top: clamp(1.8rem, 5vw, 2.6rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--on-dark-muted);
}

.page-home .hero__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--sand-500);
  font-variant-numeric: tabular-nums;
}

.page-home .hero__visual {
  position: relative;
  margin: 0;
}

.page-home .hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 5%, 100% 0, 100% 100%, 0 95%);
}

.page-home .hero__badge {
  position: absolute;
  left: clamp(0.6rem, 2vw, 1.3rem);
  bottom: clamp(0.6rem, 2vw, 1.3rem);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.55rem 0.85rem;
  background: rgba(11, 18, 48, 0.86);
  border: 1px solid var(--sand-500);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
}

.page-home .hero__badge-k {
  color: var(--jade-500);
  letter-spacing: 0.1em;
}

.page-home .hero__badge-v {
  color: var(--sand-200);
}

/* ---------- 通用章节 ---------- */

.page-home .band {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  position: relative;
}

.page-home .band--paper {
  background: var(--paper-100);
}

.page-home .band--deep {
  background: var(--indigo-950);
  color: var(--on-dark);
}

.page-home .band--sand {
  background: var(--indigo-800);
  color: var(--on-dark);
}

.page-home .sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-home .sec-head--inverse {
  border-top-color: var(--line-dark);
}

.page-home .sec-head__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--sand-500);
}

.page-home .sec-head__title {
  font-size: clamp(1.45rem, 3.6vw, 2.15rem);
}

.page-home .sec-head__note {
  flex: 1 1 100%;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--slate-400);
  letter-spacing: 0.02em;
}

.page-home .band--deep .sec-head__title,
.page-home .band--sand .sec-head__title {
  color: #fff;
}

.page-home .band--deep .sec-head__note,
.page-home .band--sand .sec-head__note {
  color: var(--on-dark-muted);
}

/* ---------- 变化速览 ---------- */

.page-home .change-list {
  border-top: 1px solid var(--line-dark);
}

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

.page-home .change__btn {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(0.7rem, 3vw, 1.6rem);
  align-items: center;
  width: 100%;
  padding: clamp(1rem, 3vw, 1.5rem) 0;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur-2) ease;
}

.page-home .change__btn:hover {
  background: rgba(200, 162, 74, 0.08);
}

.page-home .change__btn:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-home .change__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--sand-500);
  font-variant-numeric: tabular-nums;
}

.page-home .change__head {
  display: block;
}

.page-home .change__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 2.4vw, 1.16rem);
  color: #fff;
}

.page-home .change__sum {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.88rem;
  color: var(--on-dark-muted);
}

.page-home .change__mark {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-home .change__mark::before,
.page-home .change__mark::after {
  content: "";
  position: absolute;
  background: var(--sand-500);
  transition: transform var(--dur-3) ease;
}

.page-home .change__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1.5px;
}

.page-home .change__mark::after {
  top: 0;
  left: 6px;
  width: 1.5px;
  height: 14px;
}

.page-home .change__btn[aria-expanded="true"] .change__mark::after {
  transform: scaleY(0);
}

.page-home .change__panel {
  padding: 0;
}

.page-home .change__panel-inner {
  max-width: 62ch;
  padding: 0 0 clamp(1rem, 3vw, 1.5rem) clamp(0rem, 6vw, 3.4rem);
  font-size: 0.96rem;
  color: var(--on-dark-muted);
}

/* ---------- 两条主线 ---------- */

.page-home .lines {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.5rem);
}

.page-home .line {
  position: relative;
  background: var(--paper-050);
  border: 1px solid var(--line);
  border-left: 3px solid var(--sand-500);
  padding: clamp(1.4rem, 4vw, 2.2rem);
  transition: box-shadow var(--dur-2) ease, transform var(--dur-2) ease;
}

.page-home .line--scope {
  border-left-color: var(--jade-500);
}

.page-home .line:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.page-home .line__kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--slate-400);
  margin: 0 0 0.7rem;
}

.page-home .line__title {
  font-size: clamp(1.15rem, 2.8vw, 1.4rem);
  margin-bottom: 0.85rem;
}

.page-home .line__body {
  font-size: 0.98rem;
  line-height: 1.95;
  color: var(--ink-900);
}

.page-home .line__points {
  list-style: none;
  margin-top: 1rem;
  border-top: 1px dashed var(--line-strong);
}

.page-home .line__points li {
  padding: 0.45rem 0 0.45rem 1.1rem;
  position: relative;
  font-size: 0.9rem;
  color: var(--slate-400);
  border-bottom: 1px dashed var(--line);
}

.page-home .line__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05rem;
  width: 5px;
  height: 5px;
  background: var(--sand-500);
  transform: rotate(45deg);
}

.page-home .line__cta {
  margin-top: 1.3rem;
}

.page-home .changes-visual {
  margin: clamp(1.8rem, 5vw, 2.8rem) 0 0;
}

.page-home .changes-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.94;
}

/* ---------- 栏目索引长卷 ---------- */

.page-home .index-list {
  list-style: none;
  border-top: 1px solid var(--line-dark);
  counter-reset: none;
}

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

.page-home .index-list__link {
  position: relative;
  display: grid;
  grid-template-columns: minmax(2.4rem, auto) 1fr;
  grid-template-areas:
    "num name"
    "num desc";
  gap: 0.15rem clamp(0.8rem, 3vw, 1.6rem);
  align-items: baseline;
  padding: clamp(0.9rem, 2.6vw, 1.2rem) 2.6rem clamp(0.9rem, 2.6vw, 1.2rem) clamp(0.4rem, 1.5vw, 0.9rem);
  text-decoration: none;
  color: inherit;
  transition: background-color var(--dur-2) ease, padding-left var(--dur-2) ease;
}

.page-home .index-list__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--sand-500);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur-2) ease;
}

.page-home .index-list__link:hover,
.page-home .index-list__link:focus-visible {
  background: rgba(47, 212, 198, 0.07);
  padding-left: clamp(0.7rem, 2.2vw, 1.4rem);
}

.page-home .index-list__link:hover::before,
.page-home .index-list__link:focus-visible::before {
  transform: scaleY(1);
}

.page-home .index-list__link:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: -1px;
}

.page-home .index-list__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--sand-500);
  font-variant-numeric: tabular-nums;
}

.page-home .index-list__name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  color: #fff;
}

.page-home .index-list__desc {
  grid-area: desc;
  font-size: 0.87rem;
  color: var(--on-dark-muted);
}

.page-home .index-list__arrow {
  position: absolute;
  right: clamp(0.5rem, 1.6vw, 1rem);
  top: 50%;
  transform: translate(-8px, -50%);
  opacity: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan-400);
  transition: opacity var(--dur-2) ease, transform var(--dur-2) ease;
}

.page-home .index-list__link:hover .index-list__arrow,
.page-home .index-list__link:focus-visible .index-list__arrow {
  opacity: 1;
  transform: translate(0, -50%);
}

.page-home .index-visual {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
}

.page-home .index-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.85;
}

/* ---------- 移动端 ---------- */

.page-home .mobile-split {
  display: grid;
  gap: clamp(1.6rem, 5vw, 2.8rem);
  align-items: center;
}

.page-home .mobile-copy .lede {
  font-size: clamp(1rem, 2.2vw, 1.08rem);
  line-height: 1.95;
}

.page-home .mobile-copy p {
  max-width: 58ch;
}

.page-home .mobile-cta {
  margin-top: 1.4rem;
}

.page-home .mobile-figure {
  margin: 0;
  border: 1px solid var(--line);
  padding: clamp(0.5rem, 2vw, 1rem);
  background: var(--paper-050);
}

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

/* ---------- 联系 ---------- */

.page-home .band--contact {
  background: var(--paper-050);
  border-top: 1px solid var(--line-strong);
}

.page-home .contact-block {
  display: grid;
  gap: clamp(1.6rem, 5vw, 2.8rem);
  align-items: start;
}

.page-home .contact-lede {
  max-width: 56ch;
  font-size: 0.99rem;
  line-height: 1.95;
}

.page-home .contact-meta {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-home .contact-meta__row {
  display: grid;
  gap: 0.25rem 1.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.page-home .contact-meta dt {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--slate-400);
}

.page-home .contact-meta dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-900);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-home .contact-meta__row {
    grid-template-columns: 6.5rem 1fr;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-home .hero__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-home .lines {
    grid-template-columns: 5fr 7fr;
  }

  .page-home .mobile-split {
    grid-template-columns: 6fr 6fr;
  }

  .page-home .contact-block {
    grid-template-columns: 7fr 5fr;
  }

  .page-home .index-list__link {
    grid-template-columns: minmax(3.2rem, auto) 16rem 1fr;
    grid-template-areas: "num name desc";
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .line,
  .page-home .change__btn,
  .page-home .change__mark::before,
  .page-home .change__mark::after,
  .page-home .index-list__link,
  .page-home .index-list__link::before,
  .page-home .index-list__arrow {
    transition: none !important;
  }

  .page-home .line:hover {
    transform: none;
  }
}