/* =========================================================
   page-home — 首页专属样式（全部限定在 .page-home 作用域内）
   ========================================================= */

.page-home {
  --home-sec-pad: clamp(56px, 7.5vw, 104px);
  --home-gap: clamp(20px, 3vw, 40px);
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 通用排版 ---------- */

.page-home .mono {
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

.page-home .eyebrow {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-home .link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  color: var(--cyan);
  font-size: .9375rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 212, 234, .35);
  padding-bottom: 3px;
  transition: border-color var(--ease), color var(--ease);
}

.page-home .link-arrow::after {
  content: "";
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--ease);
}

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

.page-home .link-arrow:hover::after,
.page-home .link-arrow:focus-visible::after {
  transform: rotate(45deg) translate(2px, -2px);
}

/* ---------- 首屏 ---------- */

.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: var(--line);
  background: linear-gradient(158deg, var(--slate) 0%, var(--ink) 60%);
}

.page-home .hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(43, 50, 59, .42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 50, 59, .42) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(130% 100% at 14% 6%, #000 0%, rgba(0, 0, 0, .38) 58%, transparent 84%);
          mask-image: radial-gradient(130% 100% at 14% 6%, #000 0%, rgba(0, 0, 0, .38) 58%, transparent 84%);
  pointer-events: none;
}

.page-home .hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .22;
  pointer-events: none;
}

.page-home .hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  padding-block: clamp(52px, 9vw, 116px) clamp(48px, 7vw, 88px);
}

.page-home .hero__rail {
  display: none;
}

.page-home .hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.2vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--white);
  text-wrap: balance;
}

.page-home .hero__lede {
  margin: 26px 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.1vw, 1.0625rem);
  line-height: 1.85;
  letter-spacing: .01em;
  color: var(--silver);
}

.page-home .hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

/* 首屏章节索引 */

.page-home .hero__index {
  display: grid;
  border-top: var(--line);
}

.page-home .hero__index-item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 18px 2px;
  border-bottom: var(--line);
  text-decoration: none;
  color: inherit;
  transition: background var(--ease);
}

.page-home .hero__index-item::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--amber), var(--amber-deep));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--ease);
}

.page-home .hero__index-item:hover::before,
.page-home .hero__index-item:focus-visible::before {
  transform: scaleY(1);
}

.page-home .hero__index-no {
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--mist);
  transition: color var(--ease);
}

.page-home .hero__index-item:hover .hero__index-no,
.page-home .hero__index-item:focus-visible .hero__index-no {
  color: var(--amber);
}

.page-home .hero__index-name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-home .hero__index-desc {
  display: block;
  margin-top: 5px;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .hero__index-arrow {
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--mist);
  border-right: 1px solid var(--mist);
  transform: rotate(45deg);
  transition: border-color var(--ease), transform var(--ease);
}

.page-home .hero__index-item:hover .hero__index-arrow,
.page-home .hero__index-item:focus-visible .hero__index-arrow {
  border-color: var(--amber);
  transform: rotate(45deg) translate(2px, -2px);
}

/* ---------- 章节通用骨架 ---------- */

.page-home .sec {
  position: relative;
  padding-block: var(--home-sec-pad);
  border-bottom: var(--line);
}

.page-home .sec__field {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(43, 50, 59, .28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 50, 59, .28) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

.page-home .sec > .shell {
  position: relative;
  z-index: 1;
}

.page-home .sec__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-home .sec__no {
  position: relative;
  padding-left: 18px;
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--mist);
  transition: color var(--ease);
}

.page-home .sec__no::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: -2px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber), var(--amber-deep));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--ease);
}

.page-home .sec.is-active .sec__no {
  color: var(--amber);
}

.page-home .sec.is-active .sec__no::before {
  transform: scaleY(1);
}

.page-home .sec__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-home .sec__title {
  margin: 0 0 20px;
  max-width: 26ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3vw, 2.45rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--white);
  text-wrap: balance;
}

.page-home .sec__lede {
  margin: 0 0 clamp(26px, 3.4vw, 44px);
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-home .sec__text p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-home .sec__foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-top: 18px;
  border-top: var(--line);
  max-width: 68ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 01 品牌与服务范围 ---------- */

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

.page-home .fact-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--hairline);
  overflow: hidden;
}

.page-home .fact {
  padding: 20px 16px;
  background: var(--graphite);
}

.page-home .fact__val {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--amber);
}

.page-home .fact__label {
  display: block;
  margin-top: 8px;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-home .range-band {
  position: relative;
  margin-top: clamp(32px, 4vw, 52px);
  overflow: hidden;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--slate);
}

.page-home .range-band__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .18;
  pointer-events: none;
}

.page-home .range-band__inner {
  position: relative;
  z-index: 1;
  padding: clamp(24px, 3vw, 38px);
  background: linear-gradient(92deg, rgba(20, 24, 31, .92) 0%, rgba(11, 13, 16, .66) 100%);
}

.page-home .range-band__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-home .range-band__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .range-band__list li {
  padding: 5px 11px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background: rgba(28, 34, 43, .72);
  font-size: .875rem;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 02 资费速览 ---------- */

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

.page-home .fee-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-home .fee-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px;
  background: var(--graphite);
  border: var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform var(--ease), border-color var(--ease);
}

.page-home .fee-card:hover,
.page-home .fee-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--amber-deep);
}

.page-home .fee-card:focus-within {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-home .fee-card .data-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .01em;
  color: var(--white);
}

.page-home .fee-card__desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--silver);
}

.page-home .fee-card .data-card__list {
  margin: 0;
  padding: 14px 0 0;
  border-top: var(--line);
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-home .fee-card .data-card__list li {
  position: relative;
  padding-left: 14px;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .fee-card .data-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 5px;
  height: 1px;
  background: var(--amber-deep);
}

.page-home .fee-visual {
  margin: 0;
}

.page-home .fee-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--graphite);
}

.page-home .fee-visual figcaption {
  margin-top: 12px;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 03 版本与旧版节点 ---------- */

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

.page-home .ver-visual {
  margin: 0;
}

.page-home .ver-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--graphite);
}

.page-home .vline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--hairline);
  overflow: hidden;
}

.page-home .vline__item {
  position: relative;
  padding: 20px 16px;
  background: var(--graphite);
}

.page-home .vline__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--hairline);
}

.page-home .vline__item--now::before {
  background: linear-gradient(90deg, var(--amber), var(--amber-deep));
}

.page-home .vline__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-home .vline__item--now .vline__no {
  color: var(--amber);
}

.page-home .vline__txt {
  display: block;
  margin-top: 9px;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-home .migrate {
  margin-top: 28px;
  padding: 22px 20px;
  border-left: 2px solid var(--amber);
  background: linear-gradient(90deg, rgba(28, 34, 43, .9), rgba(11, 13, 16, .35));
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-home .migrate__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-home .steps {
  counter-reset: step;
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-home .steps li {
  counter-increment: step;
  position: relative;
  padding-left: 42px;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-home .steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .18em;
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 04 帮助与联系通道 ---------- */

.page-home .help-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--hairline);
  overflow: hidden;
}

.page-home .help-card {
  padding: clamp(24px, 3vw, 40px);
  background: var(--graphite);
}

.page-home .help-card--dock {
  background: linear-gradient(160deg, var(--slate) 0%, var(--graphite) 100%);
}

.page-home .help-card__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-home .help-card p {
  margin: 0 0 14px;
  font-size: .9375rem;
  line-height: 1.82;
  color: var(--silver);
}

.page-home .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 22px;
}

.page-home .contact-list {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
}

.page-home .contact-list div {
  padding-bottom: 14px;
  border-bottom: var(--line);
}

.page-home .contact-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-home .contact-list dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-home .contact-list dd {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--white);
  word-break: break-word;
}

.page-home .help-card__note {
  margin: 20px 0 0 !important;
  padding-top: 16px;
  border-top: var(--line);
  font-size: .8125rem !important;
  line-height: 1.8;
  color: var(--mist) !important;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-home .fee-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-home .brand-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 980px) {
  .page-home .fee-layout {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    align-items: start;
  }

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

  .page-home .fee-visual {
    position: sticky;
    top: calc(var(--header-h-min) + 24px);
  }

  .page-home .ver-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-home .hero__inner {
    grid-template-columns: 44px minmax(0, 1.25fr) minmax(340px, .85fr);
    gap: clamp(24px, 3.2vw, 52px);
    align-items: start;
  }

  .page-home .hero__rail {
    display: grid;
    gap: 20px;
    justify-items: center;
    align-content: start;
    padding-top: 8px;
    border-right: var(--line);
    min-height: 180px;
  }

  .page-home .hero__rail span {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: .6875rem;
    letter-spacing: .22em;
    color: var(--mist);
  }

  .page-home .hero__index {
    border-bottom: var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home *,
  .page-home *::before,
  .page-home *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }
}