.page-home {
  --home-gap: clamp(52px, 7vw, 96px);
  --home-line: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

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

.page-home .mono {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 页内编号索引带 ---------- */
.page-home .home-rail {
  display: none;
}

@media (min-width: 1440px) {
  .page-home .home-rail {
    display: flex;
    flex-direction: column;
    gap: 3px;
    position: fixed;
    top: 50%;
    right: 22px;
    transform: translateY(-50%);
    z-index: 20;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .page-home .home-rail .num-rail__item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    border-left: 2px solid var(--line);
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 12px;
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  }

  .page-home .home-rail .num-rail__item:hover,
  .page-home .home-rail .num-rail__item:focus-visible {
    border-left-color: var(--blue-mid);
    color: var(--blue);
  }

  .page-home .home-rail .num-rail__item[data-active] {
    border-left-color: var(--blue);
    color: var(--blue);
  }
}

.page-home .home-rail__label {
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* ---------- 首屏 ---------- */
.page-home .home-hero {
  background: linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 68%);
  border-bottom: var(--home-line);
  padding: clamp(26px, 4vw, 52px) 0 var(--home-gap);
}

.page-home .home-hero__grid {
  display: grid;
  gap: clamp(34px, 5vw, 68px);
  align-items: start;
}

@media (min-width: 940px) {
  .page-home .home-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.82fr);
  }

  .page-home .home-hero__right {
    margin-top: clamp(38px, 5vw, 76px);
  }
}

.page-home .breadcrumb {
  margin-bottom: 20px;
}

.page-home .home-kicker {
  margin: 0 0 16px;
  padding-left: 10px;
  border-left: 2px solid var(--blue);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-mid);
}

.page-home .home-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 16ch;
}

.page-home .home-hero__lead {
  margin: 0 0 26px;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ink-soft);
}

/* 编号输入组件 */
.page-home .code-entry {
  border: var(--home-line);
  background: var(--paper);
  padding: clamp(15px, 2.2vw, 22px);
  box-shadow: 0 1px 0 var(--line), 0 18px 34px -32px var(--blue-deep);
}

.page-home .code-entry__label {
  display: block;
  margin-bottom: 9px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.page-home .code-entry__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-home .code-entry__input {
  flex: 1 1 190px;
  min-width: 0;
  padding: 12px 14px;
  border: var(--home-line);
  border-radius: 0;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.04em;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-home .code-entry__input::placeholder {
  color: var(--ink-soft);
  opacity: 0.7;
}

.page-home .code-entry__input:focus {
  outline: 2px solid var(--blue-mid);
  outline-offset: 1px;
  border-color: var(--blue-mid);
  background: var(--paper);
}

.page-home .code-entry__btn {
  flex: 0 0 auto;
}

.page-home .code-entry__hint {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
}

.page-home .code-entry__sample-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: var(--home-line);
}

.page-home .code-entry__sample {
  margin: 0;
  padding: 4px 10px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.page-home .code-entry__copy {
  font-size: 12px;
}

/* 编号结构三段 */
.page-home .code-anatomy {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

@media (min-width: 560px) {
  .page-home .code-anatomy {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-home .code-anatomy__seg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--paper);
}

.page-home .code-anatomy__seg:first-child {
  box-shadow: inset 2px 0 0 var(--blue);
}

.page-home .code-anatomy__val {
  font-size: 20px;
  color: var(--blue);
  letter-spacing: 0.06em;
}

.page-home .code-anatomy__key {
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

/* 首屏右：段位阶梯 + 主视觉 */
.page-home .home-hero__right {
  display: grid;
  gap: 20px;
}

.page-home .code-ladder {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

.page-home .code-ladder__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 11px 14px;
  background: var(--paper);
  transition: background var(--dur) var(--ease);
}

.page-home .code-ladder__row:hover {
  background: var(--blue-soft);
}

.page-home .code-ladder__key {
  font-size: 13px;
  color: var(--blue);
  letter-spacing: 0.08em;
}

.page-home .code-ladder__bar {
  height: 6px;
  background: var(--blue-soft);
  border-left: 2px solid var(--blue-mid);
}

.page-home .code-ladder__row:nth-child(1) .code-ladder__bar { width: 40%; }
.page-home .code-ladder__row:nth-child(2) .code-ladder__bar { width: 58%; }
.page-home .code-ladder__row:nth-child(3) .code-ladder__bar { width: 78%; }
.page-home .code-ladder__row:nth-child(4) .code-ladder__bar { width: 100%; }

.page-home .home-hero__media {
  margin: 0;
  border: var(--home-line);
  background: var(--paper-2);
}

.page-home .home-hero__media .media-frame__img {
  object-fit: cover;
}

/* ---------- 章节通用 ---------- */
.page-home .home-section {
  padding: var(--home-gap) 0;
  border-bottom: var(--home-line);
}

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

.page-home .home-section > .wrap > .section-label {
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-home .home-section__lead {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 01 四类编号索引 ---------- */
.page-home .code-index__list {
  border-top: var(--home-line);
}

.page-home .code-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 0 20px;
  border-bottom: var(--home-line);
  transition: background var(--dur) var(--ease);
}

.page-home .code-row:hover {
  background: var(--paper-2);
}

.page-home .code-row__key {
  grid-column: 1;
  grid-row: 1 / span 3;
  margin: 0;
  font-size: 17px;
  color: var(--blue);
  letter-spacing: 0.06em;
}

.page-home .code-row__main,
.page-home .code-row__term {
  grid-column: 2;
}

.page-home .code-row__title {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-home .code-row__desc {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-home .code-row__term {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-home .code-row__unit {
  margin-left: 4px;
  font-size: 12px;
  color: var(--ink-soft);
}

@media (min-width: 880px) {
  .page-home .code-row {
    grid-template-columns: 90px minmax(0, 1fr) 118px;
    align-items: start;
    padding: 22px 0 24px;
  }

  .page-home .code-row__term {
    grid-column: 3;
    grid-row: 1;
    text-align: right;
  }
}

.page-home .code-index__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-home .code-index__media {
  margin: 0;
  border: var(--home-line);
  background: var(--paper-2);
}

.page-home .code-index__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-home .code-index__link {
  justify-self: start;
}

/* ---------- 02 两条路径 ---------- */
.page-home .path-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: var(--home-line);
}

@media (min-width: 880px) {
  .page-home .path-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .path-card--manual {
    margin-top: 34px;
  }
}

.page-home .path-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--paper);
  transition: background var(--dur) var(--ease);
}

.page-home .path-card:hover {
  background: var(--paper-2);
}

.page-home .path-card__chip {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-mid);
}

.page-home .path-card__title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-home .path-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink-soft);
}

.page-home .path-card__label {
  margin: 6px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.page-home .path-card__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  border-top: var(--home-line);
  padding-top: 12px;
}

.page-home .path-card__btn {
  align-self: flex-start;
  margin-top: auto;
}

/* 结果字段 */
.page-home .result-fields {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(34px, 5vw, 56px);
  padding-top: clamp(24px, 3.4vw, 38px);
  border-top: var(--home-line);
}

@media (min-width: 880px) {
  .page-home .result-fields {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

.page-home .result-fields__title {
  margin: 0 0 16px;
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
}

.page-home .result-fields__media {
  margin: 0;
  border: var(--home-line);
  background: var(--paper-2);
}

/* ---------- 03 工艺六段 ---------- */
.page-home .craft-media {
  margin: 0 0 clamp(26px, 3.6vw, 40px);
  border: var(--home-line);
  background: var(--paper-2);
}

.page-home .craft-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

.page-home .craft-step {
  background: var(--paper);
}

.page-home .craft-step__head {
  width: 100%;
}

@media (min-width: 900px) {
  .page-home .craft-step:nth-child(2) { margin-left: 18px; }
  .page-home .craft-step:nth-child(3) { margin-left: 36px; }
  .page-home .craft-step:nth-child(4) { margin-left: 54px; }
  .page-home .craft-step:nth-child(5) { margin-left: 72px; }
  .page-home .craft-step:nth-child(6) { margin-left: 90px; }
}

/* ---------- 04 规模与触点 ---------- */
.page-home .scale-grid {
  row-gap: clamp(28px, 4vw, 44px);
}

.page-home .scale-main {
  border-left: 2px solid var(--blue);
  padding-left: clamp(16px, 2vw, 24px);
}

.page-home .scale-main__figure {
  margin: 0;
  font-size: clamp(46px, 7vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-home .scale-main__label {
  margin: 8px 0 20px;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-home .scale-roles {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

.page-home .scale-roles li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px;
  background: var(--paper);
  font-size: 15px;
  color: var(--ink);
}

.page-home .scale-roles__n {
  min-width: 42px;
  font-size: 15px;
  color: var(--blue);
}

.page-home .scale-main__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-home .scale-net__figure {
  margin: 0;
  font-size: clamp(46px, 7vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-home .scale-net__label {
  margin: 8px 0 20px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-home .scale-net__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

.page-home .scale-net__list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 12px;
  background: var(--paper);
  font-size: 14px;
  color: var(--ink);
}

.page-home .scale-net__list .mono {
  font-size: 16px;
  color: var(--blue);
}

.page-home .scale-net__note {
  margin: 18px 0 20px;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-home .scale-net__link {
  justify-self: start;
}

/* ---------- 05 文档导航摘要 ---------- */
.page-home .guide-summary {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

@media (min-width: 880px) {
  .page-home .guide-summary {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-home .guide-summary__lead {
  margin: 0 0 22px;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-home .guide-summary__btn {
  justify-self: start;
}

.page-home .guide-chapters {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: var(--home-line);
}

.page-home .guide-chapters__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  background: var(--paper);
  transition: background var(--dur) var(--ease);
}

.page-home .guide-chapters__item:hover {
  background: var(--blue-soft);
}

.page-home .guide-chapters__num {
  font-size: 13px;
  color: var(--blue-mid);
}

.page-home .guide-chapters__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-home .guide-summary__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ---------- 06 生效与核对 ---------- */
.page-home .version-grid {
  row-gap: 22px;
}

@media (min-width: 880px) {
  .page-home .version-card--offset {
    margin-top: 30px;
  }
}

.page-home .version-card {
  border: var(--home-line);
  background: var(--paper-2);
  padding: clamp(20px, 3vw, 28px);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .version-card:hover {
  background: var(--paper);
  border-color: var(--line-strong);
}

.page-home .version-card__key {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-mid);
}

.page-home .version-card__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-home .version-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink-soft);
}

.page-home .version-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3.6vw, 40px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: var(--home-line);
}

/* ---------- 窄屏校正 ---------- */
@media (max-width: 559px) {
  .page-home .code-ladder__row {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 10px;
  }

  .page-home .code-row {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 4px 12px;
  }

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

  .page-home .version-links .btn {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .code-entry__input,
  .page-home .code-ladder__row,
  .page-home .code-row,
  .page-home .path-card,
  .page-home .guide-chapters__item,
  .page-home .version-card,
  .page-home .home-rail .num-rail__item {
    transition: none;
  }
}