/* ==========================================================================
   SPACUUM — 页面级版式（Hero / 平铺 / 全宽 / 分栏）
   ========================================================================== */

/* ---------- Hero：白底大图 + 强排版（Apple 产品页主视觉） ---------- */

.hero {
  position: relative;
  padding-top: clamp(3rem, 7vw, 6rem);
  text-align: center;
  overflow: hidden;
}

.hero__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero__eyebrow {
  font-size: var(--fs-small);
  font-weight: var(--w-semibold);
  letter-spacing: 0.02em;
  color: var(--c-brand);
  margin-bottom: var(--space-3);
}

.hero__title {
  font-size: var(--fs-hero);
  font-weight: var(--w-semibold);
  letter-spacing: -0.04em;
  line-height: 0.96;
}

.hero__title em {
  font-style: normal;
  color: var(--c-brand);
}

.hero__sub {
  margin: var(--space-5) auto 0;
  max-width: 34ch;
  font-size: var(--fs-lead);
  line-height: 1.36;
  letter-spacing: -0.02em;
  color: var(--c-ink-2);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: var(--space-5);
}

.hero__media {
  position: relative;
  margin: clamp(2rem, 5vw, 4rem) auto 0;
  max-width: 1180px;
  padding-inline: var(--gutter);
}

.hero__media img {
  width: 100%;
  border-radius: var(--radius-xl);
  background: var(--c-bg-alt);
  aspect-ratio: 16 / 10;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

/* 带轻微缩放的入场（Apple 的 hero 常见效果） */
.hero__media img {
  animation: heroZoom 1.4s var(--ease-out) both;
}

@keyframes heroZoom {
  from {
    transform: scale(1.04);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* ---------- 平铺卡（Tiles）：两列大块产品 ---------- */

.tiles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  padding-inline: 0.75rem;
  max-width: var(--container-wide);
  margin-inline: auto;
}

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 520px;
  padding: clamp(1.75rem, 3vw, 2.75rem);
  border-radius: var(--radius-lg);
  background: var(--c-bg-alt);
  overflow: hidden;
  text-align: center;
  color: var(--c-ink);
  isolation: isolate;
  transition: box-shadow var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}

.tile:hover {
  color: var(--c-ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.tile__eyebrow {
  font-size: var(--fs-micro);
  font-weight: var(--w-semibold);
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--c-brand);
}

.tile__title {
  margin-top: 0.6rem;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  letter-spacing: -0.028em;
  line-height: 1.05;
}

.tile__text {
  margin: 0.75rem auto 0;
  max-width: 34ch;
  font-size: var(--fs-body);
  line-height: 1.42;
  color: var(--c-ink-3);
}

.tile__media {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin-top: var(--space-5);
  min-height: 220px;
}

.tile__media img {
  width: 100%;
  height: 100%;
  max-height: 320px;
  object-fit: contain;
  border-radius: var(--radius);
  transition: transform var(--dur-slow) var(--ease-out);
}

.tile:hover .tile__media img {
  transform: scale(1.035);
}

.tile--dark {
  background: var(--c-dark);
  color: var(--c-dark-ink);
}

.tile--dark:hover {
  color: var(--c-dark-ink);
}

.tile--dark .tile__text {
  color: var(--c-dark-ink-2);
}

.tile--dark .tile__eyebrow {
  color: #7fb0f0;
}

.tile--wide {
  grid-column: 1 / -1;
  min-height: 420px;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  align-items: center;
  text-align: left;
  gap: var(--space-5);
}

.tile--wide .tile__text {
  margin-inline: 0;
}

.tile--wide .tile__media {
  margin-top: 0;
  align-items: center;
}

.tile--wide .tile__media img {
  object-fit: cover;
  max-height: 100%;
  aspect-ratio: 4 / 3;
}

.tile__content {
  position: relative;
  z-index: 2;
}

/* ---------- 全宽沉浸区块（Apple 的「Bento」大图段） ---------- */

.banner {
  position: relative;
  overflow: hidden;
  min-height: clamp(360px, 52vw, 560px);
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  background: var(--c-dark);
}

.banner__media {
  position: absolute;
  inset: 0;
}

.banner__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
}

.banner__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 10, 20, 0.55) 0%,
    rgba(6, 10, 20, 0.35) 45%,
    rgba(6, 10, 20, 0.62) 100%
  );
}

.banner__inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: var(--space-8) var(--gutter);
}

.banner .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

.banner__title {
  margin-top: 0.8rem;
  font-size: clamp(2rem, 4.4vw, 3.5rem);
  letter-spacing: -0.032em;
  line-height: 1.04;
}

.banner__text {
  margin: var(--space-4) auto 0;
  max-width: 52ch;
  font-size: var(--fs-lead);
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.82);
}

.banner__actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.banner .btn--light:hover {
  background: rgba(255, 255, 255, 0.88);
}

/* ---------- 双栏叙事（图 + 文，交替方向） ---------- */

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.split + .split {
  margin-top: clamp(3rem, 7vw, 6rem);
}

.split__media img {
  width: 100%;
  border-radius: var(--radius-lg);
  background: var(--c-bg-alt);
  object-fit: cover;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-sm);
}

.split--reverse .split__media {
  order: 2;
}

.split__title {
  font-size: var(--fs-h2);
  letter-spacing: -0.024em;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}

.split__text {
  color: var(--c-ink-3);
  line-height: 1.6;
  font-size: var(--fs-body);
}

.split__text + .split__text {
  margin-top: 1rem;
}

/* ---------- 章节头 ---------- */

.section-head {
  max-width: 820px;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head__title {
  margin-top: 0.7rem;
  font-size: var(--fs-display);
  letter-spacing: -0.028em;
  line-height: 1.06;
}

.section-head__text {
  margin-top: var(--space-4);
  max-width: 62ch;
  font-size: var(--fs-lead);
  line-height: 1.45;
  color: var(--c-ink-3);
}

.section-head--center .section-head__text {
  margin-inline: auto;
}

.section--dark .section-head__text {
  color: var(--c-dark-ink-2);
}

/* ---------- 数据条 ---------- */

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-block: 1px solid var(--c-line-soft);
}

.fact {
  padding-right: var(--space-4);
}

.fact + .fact {
  border-left: 1px solid var(--c-line-soft);
  padding-left: var(--space-5);
  padding-right: 0;
}

.fact p {
  margin-top: 0.6rem;
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--c-ink-3);
}

/* ---------- 时间线 ---------- */

.timeline {
  position: relative;
  margin-top: var(--space-7);
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.55rem;
  bottom: 0.55rem;
  left: 132px;
  width: 1px;
  background: var(--c-line-soft);
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: var(--space-6);
  padding-block: 1.1rem;
}

.timeline__year {
  font-size: 1.0625rem;
  font-weight: var(--w-semibold);
  letter-spacing: -0.01em;
  color: var(--c-brand);
  text-align: right;
  padding-right: var(--space-4);
}

.timeline__item::after {
  content: "";
  position: absolute;
  left: 128px;
  top: 1.42rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 1.5px var(--c-brand);
}

.timeline__body h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.3rem;
}

.timeline__body p {
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--c-ink-3);
  max-width: 62ch;
}

/* ---------- 产品卡片列表 ---------- */

.product-card {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--c-line-soft);
}

.product-card:first-of-type {
  border-top: 0;
}

.product-card:nth-child(even) .product-card__media {
  order: 2;
}

.product-card__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg-alt);
}

.product-card__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.product-card:hover .product-card__media img {
  transform: scale(1.03);
}

.product-card__title {
  font-size: var(--fs-h2);
  letter-spacing: -0.026em;
  margin-top: 0.6rem;
}

.product-card__text {
  margin-top: var(--space-4);
  color: var(--c-ink-3);
  line-height: 1.6;
}

.product-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--c-line-soft);
  font-size: var(--fs-micro);
  color: var(--c-ink-4);
}

.product-card__meta strong {
  display: block;
  font-size: var(--fs-small);
  font-weight: var(--w-medium);
  color: var(--c-ink);
  margin-top: 0.15rem;
  letter-spacing: -0.01em;
}

/* ---------- 产品详情画廊 ---------- */

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: var(--space-5);
}

.gallery figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-bg-alt);
}

.gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.gallery figure:hover img {
  transform: scale(1.04);
}

.gallery figure:first-child {
  grid-column: 1 / -1;
}

.gallery figure:first-child img {
  aspect-ratio: 16 / 9;
}

/* ---------- 详情页头 ---------- */

.pdp {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
}

.pdp__grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.pdp__sticky {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}

.pdp__title {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  letter-spacing: -0.032em;
  line-height: 1.02;
}

.pdp__tagline {
  margin-top: var(--space-3);
  font-size: var(--fs-lead);
  color: var(--c-ink-2);
  letter-spacing: -0.018em;
  line-height: 1.4;
}

.pdp__text {
  margin-top: var(--space-5);
  color: var(--c-ink-3);
  line-height: 1.6;
}

.pdp__price-note {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  background: var(--c-bg-alt);
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--c-ink-2);
}

.pdp__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-5);
}

/* ---------- 特性列表 ---------- */

.features {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line-soft);
}

.features li {
  display: grid;
  grid-template-columns: minmax(140px, 0.7fr) minmax(0, 1.6fr);
  gap: var(--space-5);
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.features strong {
  font-size: 1.0625rem;
  font-weight: var(--w-semibold);
  letter-spacing: -0.015em;
}

.features span {
  font-size: var(--fs-small);
  line-height: 1.6;
  color: var(--c-ink-3);
}

/* ---------- 流程步骤 ---------- */

.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-5);
}

.step {
  counter-increment: step;
  padding-top: var(--space-4);
  border-top: 1px solid var(--c-line);
}

.step::before {
  content: "0" counter(step);
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-brand);
  margin-bottom: 0.75rem;
}

.step h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.4rem;
}

.step p {
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--c-ink-3);
}

/* ---------- 联系页 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items: start;
}

.contact-list {
  margin-top: var(--space-6);
  border-top: 1px solid var(--c-line-soft);
}

.contact-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.contact-list dt {
  font-size: var(--fs-micro);
  font-weight: var(--w-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-4);
  margin-bottom: 0.25rem;
}

.contact-list dd {
  margin: 0;
  font-size: var(--fs-body);
  letter-spacing: -0.01em;
}

.form-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--shadow);
}

/* ---------- 认证徽标 ---------- */

.certs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.cert {
  padding: var(--space-5);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background: #fff;
}

.cert strong {
  display: block;
  font-size: 1rem;
  font-weight: var(--w-semibold);
  letter-spacing: -0.01em;
}

.cert span {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--fs-micro);
  line-height: 1.5;
  color: var(--c-ink-3);
}

/* ---------- 错误页 ---------- */

.error-page {
  min-height: 62vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: var(--space-9);
}

.error-page__code {
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: var(--w-semibold);
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--c-line);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1000px) {
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fact:nth-child(3) { border-left: 0; padding-left: 0; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .certs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pdp__grid { grid-template-columns: minmax(0, 1fr); }
  .pdp__sticky { position: static; }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .tiles { grid-template-columns: minmax(0, 1fr); }
  .tile { min-height: 440px; }
  .tile--wide { grid-template-columns: minmax(0, 1fr); text-align: center; }
  .tile--wide .tile__text { margin-inline: auto; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .split--reverse .split__media { order: 0; }
  .product-card { grid-template-columns: minmax(0, 1fr); }
  .product-card:nth-child(even) .product-card__media { order: 0; }
  .timeline::before { left: 84px; }
  .timeline__item { grid-template-columns: 84px minmax(0, 1fr); gap: var(--space-5); }
  .timeline__item::after { left: 80px; }
}

@media (max-width: 640px) {
  .hero__media img { aspect-ratio: 4 / 3; border-radius: var(--radius-lg); }
  .facts { grid-template-columns: minmax(0, 1fr); }
  .fact,
  .fact + .fact {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--c-line-soft);
    padding-top: var(--space-4);
  }
  .facts .fact:first-child { border-top: 0; padding-top: 0; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .gallery { grid-template-columns: minmax(0, 1fr); }
  .gallery figure:first-child { grid-column: auto; }
  .gallery figure:first-child img { aspect-ratio: 1 / 1; }
  .features li { grid-template-columns: minmax(0, 1fr); gap: 0.35rem; }
  .timeline::before { display: none; }
  .timeline__item { grid-template-columns: minmax(0, 1fr); }
  .timeline__item::after { display: none; }
  .timeline__year { text-align: left; padding-right: 0; }
  .certs { grid-template-columns: minmax(0, 1fr); }
}