/* ============================================================
   page: home
   ============================================================ */
.page-home {
  --home-px: clamp(20px, 4.5vw, 56px);
  --home-block: clamp(56px, 8vw, 108px);
  --home-gap: clamp(18px, 2.2vw, 26px);
  display: block;
  background: var(--sea-900);
  color: var(--ink-100);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-home section[id] {
  scroll-margin-top: 132px;
}

/* ---------------- 01 首屏 ---------------- */
.page-home .hero-poster {
  position: relative;
  padding: clamp(44px, 7vw, 100px) 0 clamp(60px, 9vw, 118px);
  background:
    radial-gradient(880px 600px at 86% 6%, rgba(53, 224, 214, .18), transparent 64%),
    radial-gradient(720px 520px at 6% 92%, rgba(255, 107, 74, .11), transparent 62%),
    linear-gradient(168deg, var(--ink-950) 0%, var(--sea-900) 58%, var(--sea-800) 100%);
}

.page-home .hero-poster::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-cyan) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-cyan) 1px, transparent 1px);
  background-size: 92px 92px;
  -webkit-mask-image: radial-gradient(130% 110% at 50% 4%, #000 26%, transparent 76%);
          mask-image: radial-gradient(130% 110% at 50% 4%, #000 26%, transparent 76%);
  opacity: .7;
}

.page-home .hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-home .hero-title {
  margin: 14px 0 0;
  font-size: clamp(2.5rem, 6.6vw, 6rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: .02em;
  color: var(--paper-000);
  text-wrap: balance;
}

.page-home .hero-lead {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  line-height: 1.8;
  color: var(--ink-200);
}

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

.page-home .hero-readouts {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-home .hero-readouts .readout {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: var(--glass);
  border: 1px solid var(--line-glass);
  border-radius: 0 16px 0 16px;
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
}

.page-home .hero-readouts .readout-value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.4vw, 1.95rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--cyan-400);
}

.page-home .hero-readouts .readout-unit {
  font-size: .8125rem;
  color: var(--ink-100);
}

.page-home .hero-readouts .readout-label {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--muted);
}

.page-home .hero-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-home .hero-jump a {
  display: inline-block;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--ink-200);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-home .hero-jump a:hover,
.page-home .hero-jump a:focus-visible {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
}

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

.page-home .hero-figure img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-glass);
  border-radius: 0 26px 0 26px;
  box-shadow: var(--shadow-float);
}

.page-home .hero-figure figcaption {
  margin-top: 10px;
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------------- 章节骨架 ---------------- */
.page-home .section {
  position: relative;
  padding: var(--home-block) 0;
}

.page-home .section-head {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-home .section-num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 1.5rem;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-home .section-title {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper-000);
}

.page-home .section-lead {
  margin: 12px 0 0;
  max-width: 62ch;
  line-height: 1.8;
  color: var(--ink-200);
}

/* ---------------- 02 四条主线 ---------------- */
.page-home .lanes {
  background: var(--sea-900);
}

.page-home .lanes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
}

.page-home .lane {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 3vw, 32px);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-home .lane:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-400);
}

.page-home .lane-tag {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-home .lane .panel-title {
  margin: 0;
  font-size: clamp(1.1rem, 1.7vw, 1.4rem);
  line-height: 1.4;
  color: var(--paper-000);
}

.page-home .lane-text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-200);
}

.page-home .lane .action-link {
  margin-top: auto;
  padding-top: 4px;
}

.page-home .lane-wide-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-glass);
  border-radius: 0 20px 0 20px;
}

.page-home .lane-wide-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ---------------- 03 本期更新 ---------------- */
.page-home .updates {
  background: linear-gradient(180deg, var(--sea-900) 0%, var(--sea-800) 100%);
}

.page-home .update-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: 0;
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}

.page-home .update-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-float);
}

.page-home .update-media {
  position: relative;
  min-height: 210px;
}

.page-home .update-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .85;
}

.page-home .update-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(24px, 3.4vw, 40px);
}

.page-home .update-meta {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--amber-300);
}

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

.page-home .update-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-home .update-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-home .update-list li p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-200);
}

.page-home .update-idx {
  padding-top: .24em;
  font-size: .8125rem;
  color: var(--cyan-400);
}

.page-home .update-body .action-link {
  align-self: flex-start;
}

/* ---------------- 04 规模读数 ---------------- */
.page-home .scale {
  background: linear-gradient(180deg, var(--paper-050) 0%, var(--paper-000) 100%);
  color: var(--ink-950);
}

.page-home .scale .section-num {
  color: var(--cyan-700);
}

.page-home .scale .section-title {
  color: var(--ink-950);
}

.page-home .scale .section-lead {
  color: var(--slate-500);
}

.page-home .scale-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
}

.page-home .scale-card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.6vw, 28px);
  color: var(--ink-950);
}

.page-home .scale-value {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 8px;
}

.page-home .scale-value .readout-value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 3.6vw, 2.9rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--cyan-700);
}

.page-home .scale-value .readout-unit {
  font-size: .875rem;
  color: var(--slate-500);
}

.page-home .scale-card .readout-label {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--slate-500);
}

.page-home .tick-bar {
  display: block;
  height: 4px;
  margin-top: auto;
  padding-top: 0;
  border-radius: 999px;
  background: rgba(11, 110, 107, .14);
  overflow: hidden;
  transform: translateY(12px);
}

.page-home .tick-bar-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan-700), var(--cyan-400));
}

/* ---------------- 05 三步上手 ---------------- */
.page-home .steps {
  background: var(--sea-900);
}

.page-home .step-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
}

.page-home .step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(24px, 2.8vw, 32px) clamp(20px, 2.4vw, 28px);
  background: var(--glass);
  border: 1px solid var(--line-glass);
  border-radius: 0 20px 0 20px;
}

.page-home .step::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(20px, 2.4vw, 28px);
  right: clamp(20px, 2.4vw, 28px);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-400), transparent);
}

.page-home .step-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1;
  color: var(--cyan-400);
}

.page-home .step-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--paper-000);
}

.page-home .step p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-200);
}

.page-home .step .action-link {
  margin-top: auto;
  padding-top: 6px;
}

/* ---------------- 06 常见入口 ---------------- */
.page-home .next {
  background: linear-gradient(180deg, var(--sea-900) 0%, var(--ink-950) 100%);
}

.page-home .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
}

.page-home .next-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 186px;
  padding: clamp(20px, 2.4vw, 26px);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-home .next-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-400);
}

.page-home .next-card h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--paper-000);
}

.page-home .next-card p {
  flex: 1;
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ink-200);
}

/* ---------------- 地域条带 ---------------- */
.page-home .region-strip {
  padding: clamp(28px, 4vw, 48px) 0 clamp(20px, 3vw, 32px);
  background: var(--ink-950);
  border-top: 1px solid var(--line-soft);
}

.page-home .region-inner {
  display: grid;
  gap: 12px;
}

.page-home .region-figure {
  margin: 0;
  overflow: hidden;
  border-radius: 0 18px 0 18px;
}

.page-home .region-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .8;
}

.page-home .region-text {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------------- 媒体查询 ---------------- */
@media (min-width: 640px) {
  .page-home .scale-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-home .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-home .hero-readouts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .section-head {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: clamp(16px, 2vw, 32px);
    align-items: start;
  }

  .page-home .section-num {
    grid-column: 1;
    grid-row: 1 / span 2;
    margin-bottom: 0;
    padding-top: .12em;
    font-size: clamp(2.1rem, 3.4vw, 3.2rem);
    line-height: 1;
  }

  .page-home .section-title {
    grid-column: 2;
  }

  .page-home .section-lead {
    grid-column: 2;
    margin-top: 14px;
  }

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

  .page-home .lane--wide,
  .page-home .lane--plain {
    grid-column: 1 / -1;
  }

  .page-home .lane--wide {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: clamp(20px, 3vw, 40px);
  }

  .page-home .lane--plain {
    max-width: 760px;
  }

  .page-home .update-card {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }

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

@media (min-width: 960px) {
  .page-home .hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

@media (min-width: 1080px) {
  .page-home .next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 940px) {
  .page-home section[id] {
    scroll-margin-top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .update-card,
  .page-home .lane,
  .page-home .next-card {
    transition: none;
  }

  .page-home .update-card:hover,
  .page-home .lane:hover,
  .page-home .next-card:hover {
    transform: none;
  }
}