.page-home {
  --home-lead: clamp(16px, 1.5vw, 18px);
  --home-rule: 1px solid var(--c-steel);
  --home-block: clamp(48px, 8vw, 104px);
}

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

.page-home .section,
.page-home section {
  position: relative;
}

/* ============ 首屏 ============ */
.page-home .hero {
  position: relative;
  padding: clamp(36px, 7vw, 80px) 0 clamp(56px, 10vw, 120px);
  overflow: hidden;
}

.page-home .hero-cut {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 88% 8%, rgba(139, 92, 246, 0.28), transparent 58%),
    radial-gradient(circle at 6% 82%, rgba(47, 224, 224, 0.16), transparent 55%),
    linear-gradient(126deg, rgba(47, 224, 224, 0.14) 0%, rgba(139, 92, 246, 0.10) 46%, rgba(6, 11, 24, 0) 46.4%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 92%);
}

.page-home .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-home .hero-copy h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--c-paper);
  max-width: 18ch;
}

.page-home .hero-lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: var(--home-lead);
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-home .hero-facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  font-size: 14px;
  color: var(--c-mist);
}

.page-home .hero-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--c-steel);
}

.page-home .hero-facts .mono {
  color: var(--c-cyan);
  font-weight: 700;
}

.page-home .hero-art {
  margin: 0;
  border: 2px solid var(--c-steel);
  box-shadow: var(--shadow-block);
  background: var(--c-deep);
  overflow: hidden;
}

.page-home .hero-art img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

/* ============ 两步进入会员中心 ============ */
.page-home .member {
  padding: var(--home-block) 0;
}

.page-home .member-grid {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-home .member-head h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-home .member-head p {
  margin: 16px 0 0;
  max-width: 48ch;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .step-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-home .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  padding: 20px 22px;
  border: 1px solid var(--c-steel);
  background: var(--c-deep);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-home .step:hover {
  border-color: var(--c-cyan);
  box-shadow: 4px 4px 0 0 rgba(47, 224, 224, 0.35);
  transform: translate(-2px, -2px);
}

.page-home .step-num {
  grid-row: span 2;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-violet);
  transition: color 0.25s ease;
}

.page-home .step:hover .step-num {
  color: var(--c-orange);
}

.page-home .step h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-home .step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-home .step-figure {
  margin: 0;
  border: 2px solid var(--c-steel);
  background: var(--c-deep);
  overflow: hidden;
}

.page-home .step-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

/* ============ 十二栏目总览 ============ */
.page-home .cats {
  position: relative;
  padding: var(--home-block) 0;
  overflow: hidden;
}

.page-home .cats-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.16;
  pointer-events: none;
}

.page-home .cats-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.page-home .cats-head {
  max-width: 60ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-home .cats-head h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .cats-head p {
  margin: 16px 0 0;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .cat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1px;
  background: var(--c-steel);
  border: 1px solid var(--c-steel);
}

.page-home .cat-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 20px 24px;
  background: var(--c-void);
  transition: background 0.25s ease;
}

.page-home .cat-card:hover {
  background: var(--c-deep);
}

.page-home .cat-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-violet);
  transition: color 0.25s ease;
}

.page-home .cat-card:hover .cat-num {
  color: var(--c-orange);
}

.page-home .cat-name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-home .cat-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-mist);
}

/* ============ 双语同步 ============ */
.page-home .bilingual {
  padding: var(--home-block) 0;
}

.page-home .bilingual-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-home .bi-art {
  margin: 0;
  border: 2px solid var(--c-steel);
  box-shadow: var(--shadow-steel);
  background: var(--c-deep);
  overflow: hidden;
}

.page-home .bi-art img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-home .bi-copy h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .bi-copy > p {
  margin: 16px 0 0;
  max-width: 54ch;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .bi-pairs {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  background: var(--c-steel);
  border: var(--home-rule);
}

.page-home .bi-pair {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  background: var(--c-deep);
}

.page-home .bi-cn {
  font-size: 15px;
  color: var(--c-paper);
}

.page-home .bi-en {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--c-mist);
}

.page-home .bi-pair:hover .bi-en {
  color: var(--c-cyan);
}

.page-home .bi-note {
  margin: 22px 0 0;
  font-size: 15px;
}

.page-home .bi-note a {
  color: var(--c-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 47, 0.45);
  padding-bottom: 2px;
}

.page-home .bi-note a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ============ 移动端体验 ============ */
.page-home .mobile {
  padding: var(--home-block) 0;
}

.page-home .mobile-head {
  max-width: 58ch;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-home .mobile-head h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .mobile-head p {
  margin: 16px 0 0;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .metric-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-steel);
  border: var(--home-rule);
}

.page-home .metric {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px 20px;
  background: var(--c-void);
}

.page-home .metric-num {
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
}

.page-home .metric-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mist);
}

.page-home .mobile-tail {
  margin: 24px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
  padding-left: 16px;
  border-left: 3px solid var(--c-violet);
}

/* ============ 运营节奏 ============ */
.page-home .scale {
  padding: var(--home-block) 0;
}

.page-home .scale-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-home .scale-copy h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .scale-copy p {
  margin: 16px 0 24px;
  max-width: 48ch;
  line-height: 1.75;
  color: var(--c-mist);
}

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

.page-home .scale-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 22px;
  background: var(--c-deep);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-paper);
  transition: background 0.25s ease;
}

.page-home .scale-list li:hover {
  background: #111d3a;
}

.page-home .scale-idx {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-mint);
  padding-top: 3px;
}

/* ============ 最近更新与专题 ============ */
.page-home .digest {
  padding: var(--home-block) 0;
}

.page-home .digest-head {
  max-width: 60ch;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-home .digest-head h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .digest-head p {
  margin: 16px 0 0;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-home .digest-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-home .digest-list li {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 22px 22px 26px;
  background: var(--c-deep);
  border: 1px solid var(--c-steel);
  border-left: 4px solid var(--c-violet);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-home .digest-list li:hover {
  border-left-color: var(--c-orange);
  box-shadow: var(--shadow-violet);
  transform: translate(-2px, -2px);
}

.page-home .digest-list .tag {
  justify-self: start;
}

.page-home .digest-list h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-home .digest-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-home .series-head {
  margin: clamp(34px, 5vw, 52px) 0 18px;
}

.page-home .series-head h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-paper);
}

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

.page-home .series-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px 22px;
  border: 1px dashed var(--c-steel);
  background: rgba(13, 23, 48, 0.6);
  transition: border-color 0.25s ease;
}

.page-home .series-item:hover {
  border-color: var(--c-cyan);
}

.page-home .series-mark {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 40px;
  border: 1px solid var(--c-violet);
  color: var(--c-cyan);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-home .series-item h4 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-home .series-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-home .digest-more {
  margin: 28px 0 0;
}

/* ============ 常见疑问 ============ */
.page-home .qa {
  padding: 0 0 clamp(64px, 10vw, 120px);
}

.page-home .qa-head {
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-home .qa-head h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-home .qa-list {
  display: grid;
  gap: 1px;
  background: var(--c-steel);
  border: var(--home-rule);
}

.page-home .qa-item {
  background: var(--c-void);
}

.page-home .qa-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-paper);
  transition: color 0.2s ease, background 0.2s ease;
}

.page-home .qa-item summary::-webkit-details-marker {
  display: none;
}

.page-home .qa-item summary:hover {
  color: var(--c-cyan);
  background: var(--c-deep);
}

.page-home .qa-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border: 2px solid var(--c-cyan);
  transform: rotate(45deg);
  transition: background 0.2s ease, border-color 0.25s ease, transform 0.3s ease;
}

.page-home .qa-item[open] .qa-dot {
  background: var(--c-orange);
  border-color: var(--c-orange);
  transform: rotate(225deg);
}

.page-home .qa-item p {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-home .qa-cta {
  margin-top: 30px;
  padding: 24px 22px;
  background: var(--c-deep);
  border: 1px solid var(--c-steel);
  border-left: 4px solid var(--c-orange);
}

.page-home .qa-cta p {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-paper);
}

.page-home .qa-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ============ 断点 ============ */
@media (min-width: 640px) {
  .page-home .hero-actions {
    gap: 16px;
  }

  .page-home .qa-cta {
    padding: 28px 30px;
  }
}

@media (min-width: 900px) {
  .page-home .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    column-gap: clamp(36px, 5vw, 80px);
  }

  .page-home .hero-art {
    transform: translateY(26px);
  }

  .page-home .member-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    grid-template-areas:
      "head figure"
      "rail figure";
    align-items: start;
    column-gap: clamp(36px, 5vw, 72px);
    row-gap: 28px;
  }

  .page-home .member-head { grid-area: head; }
  .page-home .step-rail { grid-area: rail; }
  .page-home .step-figure { grid-area: figure; }

  .page-home .bilingual-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    column-gap: clamp(36px, 5vw, 64px);
  }

  .page-home .metric-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .scale-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    column-gap: clamp(36px, 5vw, 64px);
  }

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

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

@media (min-width: 1180px) {
  .page-home .hero-copy h1 {
    max-width: 16ch;
  }

  .page-home .cat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .step,
  .page-home .digest-list li,
  .page-home .cat-card,
  .page-home .series-item,
  .page-home .qa-dot {
    transition: none;
  }

  .page-home .step:hover,
  .page-home .digest-list li:hover {
    transform: none;
  }
}