.page-home {
  --ph-gap: clamp(16px, 2.6vw, 28px);
  --ph-card-pad: clamp(16px, 2.2vw, 24px);
  background: var(--ink-900);
  color: var(--mist-100);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  padding: clamp(20px, 4vw, 44px) 0 clamp(56px, 9vw, 108px);
  overflow-x: clip;
}

.page-home *,
.page-home *::before,
.page-home *::after {
  box-sizing: border-box;
}

.page-home h1,
.page-home h2,
.page-home h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-home p {
  margin: 0;
}

.page-home ul,
.page-home ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home a {
  color: inherit;
  text-decoration: none;
}

.page-home a:focus-visible,
.page-home button:focus-visible,
.page-home summary:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px rgba(183, 243, 74, 0.16);
  border-radius: var(--r-sm);
}

/* ---------- 上下文提示 ---------- */
.page-home .ph-context {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-500);
  padding: 8px 15px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: rgba(18, 53, 43, 0.62);
}

.page-home .ph-context__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime-400);
  box-shadow: 0 0 0 4px rgba(183, 243, 74, 0.16);
  flex: none;
}

/* ---------- 首屏分屏 ---------- */
.page-home .ph-open {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ph-gap);
  margin-top: clamp(20px, 3.4vw, 36px);
}

.page-home .ph-rail {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--ink-800), rgba(11, 31, 26, 0.6));
  padding: 18px 16px;
}

.page-home .ph-rail__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-400);
  margin-bottom: 12px;
}

.page-home .ph-rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-home .ph-rail__list a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1px 10px;
  align-items: center;
  padding: 10px 10px 10px 12px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-home .ph-rail__list a:hover,
.page-home .ph-rail__list a:focus-visible {
  background: rgba(183, 243, 74, 0.1);
  border-left-color: var(--lime-400);
  transform: translateX(2px);
}

.page-home .ph-rail__dot {
  grid-row: 1 / span 2;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--steel-500);
}

.page-home .ph-rail__list a:hover .ph-rail__dot {
  background: var(--lime-400);
}

.page-home .ph-rail__v {
  font-size: 15px;
  color: var(--white);
}

.page-home .ph-rail__s {
  font-size: 12px;
  color: var(--steel-500);
}

.page-home .ph-rail__foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-mid);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--steel-500);
}

.page-home .ph-open__main {
  min-width: 0;
}

.page-home .ph-open__main h1 {
  font-size: clamp(2rem, 6.6vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: -0.028em;
  color: var(--white);
}

.page-home .ph-h1__mark {
  color: var(--lime-400);
}

.page-home .ph-lead {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 62ch;
  font-size: clamp(1rem, 1.1vw + 0.72rem, 1.14rem);
  line-height: 1.75;
  color: rgba(233, 241, 238, 0.82);
}

/* ---------- 四个短路径入口 ---------- */
.page-home .ph-dir {
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-home .ph-dir__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-home .ph-dir__item > a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 14px;
  height: 100%;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(18, 53, 43, 0.5);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-home .ph-dir__item > a:hover,
.page-home .ph-dir__item > a:focus-visible {
  border-color: var(--lime-line);
  background: rgba(18, 53, 43, 0.92);
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.36);
}

.page-home .ph-dir__idx {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-size: 12px;
  color: var(--lime-400);
}

.page-home .ph-dir__title {
  font-family: var(--font-display);
  font-size: 1.16rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-home .ph-dir__desc {
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--steel-500);
}

/* ---------- 首屏通栏图 ---------- */
.page-home .ph-band {
  margin-top: clamp(26px, 4vw, 54px);
  aspect-ratio: 16 / 9;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  position: relative;
}

.page-home .ph-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.8) saturate(0.92);
}

/* ---------- 章节通用标题 ---------- */
.page-home .ph-sec-head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-home .ph-eyebrow {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.page-home .ph-sec-head h2,
.page-home .ph-keepon__copy h2,
.page-home .ph-trust h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.5rem, 3.4vw, 2.6rem);
  line-height: 1.08;
  color: var(--white);
}

.page-home .ph-sec-lead {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(233, 241, 238, 0.74);
}

/* ---------- 版本对照 ---------- */
.page-home .ph-versions {
  margin-top: clamp(48px, 7vw, 92px);
  scroll-margin-top: calc(var(--head-h) + 20px);
}

.page-home .ph-versions__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ph-gap);
}

.page-home .ph-timeline {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-home .ph-node {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--ink-800);
  overflow: hidden;
  scroll-margin-top: calc(var(--head-h) + 24px);
  transition: border-color 0.2s var(--ease);
}

.page-home .ph-node[open] {
  border-color: var(--lime-line);
}

.page-home .ph-node__sum {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2px 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-home .ph-node__sum::-webkit-details-marker {
  display: none;
}

.page-home .ph-node__v {
  font-size: 14px;
  color: var(--lime-400);
}

.page-home .ph-node__when {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-500);
}

.page-home .ph-node__hint {
  font-size: 11.5px;
  color: var(--steel-500);
  white-space: nowrap;
}

.page-home .ph-node__hint::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s var(--ease);
}

.page-home .ph-node[open] .ph-node__hint::after {
  transform: rotate(-135deg) translateY(-2px);
}

.page-home .ph-node__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.72;
  color: rgba(233, 241, 238, 0.8);
}

.page-home .ph-node__facts {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-home .ph-node__facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--steel-500);
  padding: 5px 12px 5px 6px;
  border: 1px dashed var(--line-mid);
  border-radius: var(--r-pill);
}

.page-home .tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: var(--r-pill);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: rgba(183, 243, 74, 0.16);
  color: var(--lime-300);
}

.page-home .tag--flare {
  background: rgba(255, 90, 54, 0.18);
  color: var(--flare-300);
}

.page-home .ph-compare {
  display: flex;
  flex-direction: column;
  gap: var(--ph-gap);
  min-width: 0;
}

.page-home .ph-compare__fig {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

.page-home .ph-compare__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-home .ph-compare__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--ph-card-pad);
  border: 1px solid var(--line-soft);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-home .ph-compare__col:hover {
  transform: translateY(-2px);
}

.page-home .ph-compare__col--old:hover {
  border-color: var(--steel-500);
}

.page-home .ph-compare__col--new:hover {
  border-color: var(--lime-400);
}

.page-home .ph-compare__ver {
  font-size: 12.5px;
  color: var(--steel-500);
}

.page-home .ph-compare__col--new .ph-compare__ver {
  color: var(--lime-400);
}

.page-home .ph-compare__col h3 {
  font-size: 1.1rem;
  color: var(--white);
}

.page-home .ph-compare__list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(233, 241, 238, 0.76);
}

.page-home .ph-compare__list li {
  padding-left: 16px;
  position: relative;
}

.page-home .ph-compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 1px;
  background: var(--steel-500);
}

.page-home .ph-compare__col--new .ph-compare__list li::before {
  background: var(--lime-400);
}

/* ---------- 斜切分隔 ---------- */
.page-home .ph-slash {
  height: 2px;
  margin: clamp(44px, 6vw, 84px) 0 0;
  background: linear-gradient(90deg, transparent, var(--lime-400) 22%, var(--flare-500) 78%, transparent);
  transform: skewY(-1.1deg);
  opacity: 0.7;
}

/* ---------- 面板概览 ---------- */
.page-home .ph-board {
  margin-top: clamp(44px, 6vw, 84px);
}

.page-home .ph-board__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ph-gap);
}

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

.page-home .ph-stat {
  padding: 16px 14px 18px;
  border: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-home .ph-stat:hover {
  border-color: var(--lime-line);
  transform: translateY(-2px);
}

.page-home .ph-stat__num {
  font-size: clamp(1.6rem, 4.6vw, 2.2rem);
  line-height: 1;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-home .ph-stat__num em {
  font-style: normal;
  font-size: 0.5em;
  color: var(--lime-400);
  margin-left: 2px;
}

.page-home .ph-stat__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--steel-500);
}

.page-home .ph-board__fig {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

/* ---------- 长期跟队 ---------- */
.page-home .ph-keepon {
  margin-top: clamp(48px, 7vw, 96px);
}

.page-home .ph-keepon__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ph-gap);
  align-items: center;
}

.page-home .ph-keepon__fig {
  aspect-ratio: 4 / 3;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

.page-home .ph-keepon__copy p {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233, 241, 238, 0.78);
  max-width: 58ch;
}

.page-home .ph-keepon__list {
  margin-top: clamp(18px, 2.6vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-home .ph-keepon__list a {
  display: grid;
  gap: 2px;
  padding: 14px 16px;
  border-left: 2px solid var(--line-mid);
  background: rgba(18, 53, 43, 0.42);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-home .ph-keepon__list a:hover,
.page-home .ph-keepon__list a:focus-visible {
  border-left-color: var(--lime-400);
  background: rgba(18, 53, 43, 0.85);
  transform: translateX(3px);
}

.page-home .ph-keepon__t {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-home .ph-keepon__d {
  font-size: 13px;
  color: var(--steel-500);
  line-height: 1.6;
}

/* ---------- 联系与支持 ---------- */
.page-home .ph-trust {
  margin-top: clamp(48px, 7vw, 96px);
}

.page-home .ph-trust__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-home .ph-trust__col {
  padding: var(--ph-card-pad);
  border: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-home .ph-trust__col h3 {
  font-size: 1.12rem;
  color: var(--white);
}

.page-home .ph-trust__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(233, 241, 238, 0.78);
}

.page-home .ph-trust__list li {
  padding-left: 14px;
  position: relative;
}

.page-home .ph-trust__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--steel-500);
}

.page-home .ph-trust__list--contact li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 14px;
}

.page-home .ph-trust__list--contact li span {
  color: var(--steel-500);
  font-size: 12.5px;
}

.page-home .ph-trust__list--contact li::before {
  top: 0.6em;
}

.page-home .ph-trust__list--contact .copyline {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime-300);
  background: rgba(183, 243, 74, 0.08);
  border: 1px solid var(--lime-line);
  border-radius: var(--r-pill);
  padding: 5px 13px;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-home .ph-trust__list--contact .copyline:hover {
  background: rgba(183, 243, 74, 0.2);
  color: var(--white);
}

.page-home .ph-trust__addr {
  color: rgba(233, 241, 238, 0.78);
}

.page-home .ph-trust__note {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--steel-500);
  padding-top: 12px;
  border-top: 1px dashed var(--line-mid);
}

.page-home .ph-trust__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(233, 241, 238, 0.8);
}

.page-home .ph-trust__links a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-home .ph-trust__links a:hover,
.page-home .ph-trust__links a:focus-visible {
  border-color: var(--lime-line);
  background: rgba(183, 243, 74, 0.08);
  color: var(--white);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-home .ph-dir__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-home .ph-open {
    grid-template-columns: minmax(190px, 232px) minmax(0, 1fr);
    align-items: start;
  }

  .page-home .ph-rail {
    position: sticky;
    top: calc(var(--head-h) + 18px);
  }

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

  .page-home .ph-board__layout {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-home .ph-keepon__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-home .ph-trust__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-home .ph-open__main h1 {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .ph-rail__list a,
  .page-home .ph-dir__item > a,
  .page-home .ph-stat,
  .page-home .ph-compare__col,
  .page-home .ph-keepon__list a,
  .page-home .ph-trust__links a,
  .page-home .ph-node__hint::after {
    transition: none;
  }

  .page-home .ph-rail__list a:hover,
  .page-home .ph-dir__item > a:hover,
  .page-home .ph-stat:hover,
  .page-home .ph-compare__col:hover,
  .page-home .ph-keepon__list a:hover,
  .page-home .ph-rail__list a:focus-visible,
  .page-home .ph-dir__item > a:focus-visible,
  .page-home .ph-keepon__list a:focus-visible {
    transform: none;
  }

  .page-home .ph-slash {
    transform: none;
  }
}