.page-home {
  display: block;
  background: var(--ink-800);
  color: var(--text);
}

.page-home .home-link {
  color: var(--ice-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 212, 227, 0.42);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-home .home-link:hover,
.page-home .home-link:focus-visible {
  color: #FFFFFF;
  border-bottom-color: var(--amber-400);
}

/* ============ 首屏 ============ */
.page-home .home-open {
  position: relative;
  padding-block: clamp(84px, 14vh, 158px) 0;
  background:
    radial-gradient(1100px 520px at 88% -18%, rgba(46, 143, 168, 0.30), transparent 62%),
    radial-gradient(760px 500px at -8% 4%, rgba(30, 83, 72, 0.72), transparent 66%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-800) 52%, var(--pine-900) 100%);
  overflow: hidden;
}

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

.page-home .home-open__crumb {
  margin: 0 0 clamp(20px, 3vw, 34px);
}

.page-home .home-open__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(34px, 7vw, 80px);
  line-height: 1.05;
  letter-spacing: 0.005em;
  color: #EAF2F0;
  margin: 0;
  max-width: 13ch;
}

.page-home .home-open__lede {
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  max-width: 54ch;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-home .home-open__lede strong {
  color: var(--ice-300);
  font-weight: 600;
}

/* 内容索引 */
.page-home .home-index {
  list-style: none;
  margin: clamp(34px, 5vw, 58px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-2);
}

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

.page-home .home-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2.4vw, 28px);
  padding: clamp(15px, 2.2vw, 22px) clamp(8px, 1.6vw, 16px);
  color: inherit;
  text-decoration: none;
  transition: background var(--t) var(--ease), padding-left var(--t) var(--ease);
}

.page-home .home-index__link:hover,
.page-home .home-index__link:focus-visible {
  background: linear-gradient(90deg, rgba(46, 143, 168, 0.22) 0%, rgba(18, 58, 51, 0.18) 62%, rgba(11, 27, 34, 0) 100%);
  padding-left: clamp(14px, 2.4vw, 28px);
}

.page-home .home-index__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-home .home-index__name {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 500;
  letter-spacing: 0.012em;
  color: #E6EFED;
}

.page-home .home-index__desc {
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--text-dim);
}

.page-home .home-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone-400);
  white-space: nowrap;
  justify-self: end;
}

.page-home .home-index__count .num {
  font-size: 20px;
  font-weight: 600;
  margin-right: 3px;
}

.page-home .home-open__figure {
  margin: clamp(40px, 6vw, 76px) 0 0;
  position: relative;
}

.page-home .home-open__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 47, 42, 0) 42%, rgba(11, 27, 34, 0.78) 100%);
  pointer-events: none;
}

.page-home .home-open__figure img {
  display: block;
  width: 100%;
  height: clamp(220px, 42vw, 460px);
  object-fit: cover;
  opacity: 0.86;
}

/* ============ 通用章节头 ============ */
.page-home .home-head {
  max-width: 66ch;
}

.page-home .home-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ice-300);
  margin: 0 0 clamp(12px, 1.6vw, 18px);
}

.page-home .home-head__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(27px, 4.4vw, 46px);
  line-height: 1.14;
  letter-spacing: 0.008em;
  color: #EAF2F0;
  margin: 0;
}

.page-home .home-head__lead {
  margin: clamp(16px, 2vw, 22px) 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--text-dim);
  max-width: 60ch;
}

.page-home .home-sub {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 500;
  letter-spacing: 0.012em;
  color: #E6EFED;
  margin: 0;
}

/* ============ 算法章节 ============ */
.page-home .home-algo {
  background: var(--ink-800);
}

.page-home .home-algo-list {
  margin-top: clamp(30px, 4.4vw, 52px);
  display: grid;
  gap: 10px;
}

.page-home .home-algo-list__item {
  border: 1px solid var(--line);
  border-left: 3px solid rgba(46, 143, 168, 0.5);
  background: linear-gradient(90deg, rgba(18, 58, 51, 0.44) 0%, rgba(11, 27, 34, 0.7) 50%);
  transition: border-left-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-home .home-algo-list__item:hover {
  border-left-color: var(--ice-300);
  background: linear-gradient(90deg, rgba(30, 83, 72, 0.52) 0%, rgba(11, 27, 34, 0.72) 56%);
}

.page-home .home-algo-list__item.matter-coral {
  border-left-color: rgba(228, 89, 63, 0.62);
}

.page-home .home-algo-list__item.matter-coral:hover {
  border-left-color: var(--coral-500);
}

.page-home .home-algo-list__h {
  margin: 0;
  font-size: 100%;
  font-weight: inherit;
}

.page-home .home-algo-list__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  width: 100%;
  padding: clamp(14px, 2vw, 20px) clamp(13px, 2vw, 22px);
  background: none;
  border: 0;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.page-home .home-algo-list__trigger:focus-visible {
  outline: 2px solid var(--ice-300);
  outline-offset: -2px;
}

.page-home .home-algo-list__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-home .home-algo-list__name {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 500;
  letter-spacing: 0.012em;
  color: #E6EFED;
}

.page-home .home-algo-list__hint {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-home .home-algo-list__chev {
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--ice-300);
  border-bottom: 1.5px solid var(--ice-300);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--t) var(--ease);
  flex: none;
}

.page-home .home-algo-list__trigger[aria-expanded="true"] .home-algo-list__chev {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-home .home-algo-list__panel {
  padding: 0 clamp(13px, 2vw, 22px) clamp(16px, 2vw, 22px);
}

.page-home .home-algo-list__panel[hidden] {
  display: none;
}

.page-home .home-algo-list__rows {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--line-2);
  display: grid;
  gap: 9px;
}

.page-home .home-algo-list__rows li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-home .home-algo-list__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ice-600);
}

.page-home .home-algo__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  padding-left: 14px;
  border-left: 2px solid var(--amber-400);
}

/* ============ 禁手章节 ============ */
.page-home .home-forbid {
  background: linear-gradient(180deg, var(--pine-900) 0%, var(--ink-800) 100%);
  border-top: 1px solid var(--line);
}

.page-home .home-forbid__grid {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 46px);
}

.page-home .home-forbid__label {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone-400);
}

.page-home .home-forbid__label .num {
  font-size: 34px;
  line-height: 1;
  font-weight: 600;
  color: var(--coral-500);
}

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

.page-home .home-forbid__item {
  position: relative;
  padding: 13px 16px 13px 18px;
  border-left: 3px solid var(--coral-500);
  background: linear-gradient(90deg, rgba(228, 89, 63, 0.16) 0%, rgba(228, 89, 63, 0.025) 72%);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-home .home-forbid__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 房间章节 ============ */
.page-home .home-rooms {
  background: var(--ink-800);
}

.page-home .home-rooms__grid {
  margin-top: clamp(28px, 4vw, 46px);
  align-items: start;
}

.page-home .home-rooms__list {
  min-width: 0;
}

.page-home .home-room {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 26px);
  align-items: start;
  padding-block: clamp(16px, 2.2vw, 24px);
  border-bottom: 1px solid var(--line);
}

.page-home .home-room:first-child {
  border-top: 1px solid var(--line-2);
}

.page-home .home-room__badge {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  border: 1px solid rgba(46, 143, 168, 0.5);
  background: rgba(46, 143, 168, 0.12);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--ice-300);
  flex: none;
}

.page-home .home-room__body {
  min-width: 0;
}

.page-home .home-room__time {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.3vw, 24px);
  font-weight: 600;
  color: var(--amber-400);
  letter-spacing: 0.02em;
}

.page-home .home-room__time small {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--stone-400);
  margin-left: 8px;
}

.page-home .home-room__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

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

.page-home .home-rooms__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line-2);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

/* ============ 换桌与残局章节 ============ */
.page-home .home-swap {
  background: var(--pine-900);
  border-top: 1px solid var(--line);
}

.page-home .home-swap__block {
  margin-top: clamp(30px, 4.4vw, 54px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
}

.page-home .home-swap__block--levels {
  padding-top: clamp(24px, 3.4vw, 44px);
  border-top: 1px dashed var(--line-2);
}

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

.page-home .home-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-2);
}

.page-home .home-fig--wide img {
  aspect-ratio: 2 / 1;
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.page-home .home-fig--level {
  margin-top: clamp(20px, 2.6vw, 32px);
}

.page-home .home-fig--level img {
  aspect-ratio: 3 / 2;
  clip-path: polygon(16px 0, 100% 0, 100% 100%, 0 100%, 0 16px);
}

.page-home .home-swap__body {
  min-width: 0;
}

.page-home .home-swap__cases {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-top: 1px solid var(--line);
}

.page-home .home-swap__case {
  display: grid;
  grid-template-columns: auto minmax(0, 20%) minmax(0, 1fr);
  gap: clamp(10px, 1.8vw, 20px);
  align-items: baseline;
  padding-block: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.66;
}

.page-home .home-swap__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ice-600);
}

.page-home .home-swap__k {
  color: #E6EFED;
}

.page-home .home-swap__v {
  color: var(--text-dim);
}

.page-home .home-levels__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 62ch;
}

.page-home .home-levels {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 4px 2px 18px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-home .home-levels::-webkit-scrollbar {
  height: 6px;
}

.page-home .home-levels::-webkit-scrollbar-track {
  background: rgba(138, 212, 227, 0.08);
}

.page-home .home-levels::-webkit-scrollbar-thumb {
  background: rgba(138, 212, 227, 0.3);
  border-radius: 99px;
}

.page-home .home-level {
  scroll-snap-align: start;
  flex: 0 0 clamp(212px, 62vw, 258px);
  padding: 15px 18px 18px;
  border: 1px solid var(--line-2);
  border-top: 2px solid var(--amber-400);
  background: linear-gradient(165deg, rgba(30, 83, 72, 0.5) 0%, rgba(11, 27, 34, 0.9) 66%);
}

.page-home .home-level__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-home .home-level__no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ice-300);
  line-height: 1;
}

.page-home .home-level__tier {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stone-400);
}

.page-home .home-level__room {
  margin: 10px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--stone-400);
}

.page-home .home-level__rows {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 8px;
}

.page-home .home-level__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-dim);
}

.page-home .home-level__row b {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--amber-400);
}

.page-home .home-swap__foot {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 阅读路径章节 ============ */
.page-home .home-paths {
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--pine-900) 100%);
  border-top: 1px solid var(--line);
}

.page-home .home-paths__list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border-top: 1px solid var(--line-2);
}

.page-home .home-path {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px clamp(14px, 2.4vw, 28px);
  align-items: baseline;
  padding-block: clamp(20px, 2.8vw, 30px);
  border-bottom: 1px solid var(--line);
}

.page-home .home-path__no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--amber-400);
  grid-row: span 3;
  padding-top: 3px;
}

.page-home .home-path__title {
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 500;
  letter-spacing: 0.012em;
  color: #E6EFED;
  margin: 0;
}

.page-home .home-path__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 62ch;
}

.page-home .home-path__link {
  justify-self: start;
  align-self: center;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ice-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 212, 227, 0.45);
  padding-bottom: 2px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-home .home-path__link:hover,
.page-home .home-path__link:focus-visible {
  color: #FFFFFF;
  border-bottom-color: var(--amber-400);
}

.page-home .home-paths__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ============ 响应式 ============ */
@media (max-width: 640px) {
  .page-home .home-open {
    padding-block-start: clamp(88px, 18vh, 130px);
  }

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

  .page-home .home-index__count {
    grid-column: 2;
    justify-self: start;
    margin-top: 2px;
  }

  .page-home .home-open__figure img {
    height: clamp(180px, 52vw, 260px);
  }

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

  .page-home .home-swap__v {
    grid-column: 2;
  }

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

  .page-home .home-path__no {
    grid-row: auto;
    padding-top: 0;
  }

  .page-home .home-path__link {
    margin-top: 8px;
  }
}

@media (min-width: 760px) {
  .page-home .home-forbid__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .home-swap__block {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

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

  .page-home .home-path {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: clamp(22px, 2.6vw, 32px) clamp(16px, 2vw, 26px);
    border-top: 1px solid var(--line-2);
  }

  .page-home .home-path + .home-path {
    border-left: 1px solid var(--line);
  }

  .page-home .home-path__no {
    grid-row: auto;
    padding-top: 0;
  }
}

@media (min-width: 1080px) {
  .page-home .home-open {
    padding-block-start: clamp(52px, 7vh, 88px);
  }

  .page-home .home-open__title {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-index__link,
  .page-home .home-algo-list__item,
  .page-home .home-algo-list__chev,
  .page-home .home-path__link,
  .page-home .home-link {
    transition: none;
  }
}