/* ============ 体验中心 / page-products ============ */
.page-products {
  --pp-line: rgba(124, 137, 180, 0.28);
  --pp-line-strong: rgba(53, 224, 224, 0.55);
  --pp-card: #151E45;
  --pp-radius: 28px;
  --pp-radius-sm: 16px;
  --pp-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  display: block;
  color: var(--mel-paper);
}

/* ---------- 面包屑 ---------- */
.page-products .exp-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}
.page-products .exp-crumb a {
  color: var(--mel-muted);
  text-decoration: none;
  transition: color 200ms var(--pp-ease);
}
.page-products .exp-crumb a:hover,
.page-products .exp-crumb a:focus-visible {
  color: var(--mel-cyan);
}

/* ---------- 首屏框景 ---------- */
.page-products .exp-hero {
  position: relative;
  padding: 22px 0 40px;
  overflow: hidden;
}
.page-products .exp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 85% at 92% -5%, rgba(53, 224, 224, 0.16), transparent 58%),
    radial-gradient(95% 80% at 2% 105%, rgba(255, 106, 26, 0.15), transparent 62%);
}
.page-products .exp-hero__inner {
  position: relative;
  border: 1px solid var(--pp-line);
  border-radius: var(--pp-radius);
  padding: 28px 20px 26px;
  background:
    linear-gradient(180deg, rgba(36, 26, 85, 0.62) 0%, rgba(11, 18, 51, 0.28) 100%);
  overflow: hidden;
}
.page-products .exp-hero__inner::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 88px;
  height: 3px;
  background: linear-gradient(90deg, var(--mel-orange), var(--mel-cyan));
}
.page-products .exp-hero__kicker {
  display: block;
  margin: 0 0 16px;
  color: var(--mel-cyan);
}
.page-products .exp-hero__title {
  margin: 0 0 18px;
  max-width: 17ch;
  font-family: var(--mel-font-sans);
  font-weight: 250;
  font-size: clamp(2rem, 8.4vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.012em;
  color: var(--mel-paper);
}
.page-products .exp-hero__lede {
  margin: 0 0 26px;
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.78;
  color: #cdd6f7;
}
.page-products .exp-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-products .exp-fact {
  border: 1px solid var(--pp-line);
  border-left: 2px solid var(--mel-orange);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(11, 18, 51, 0.55);
}
.page-products .exp-fact__num {
  display: block;
  font-family: var(--mel-font-mono);
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--mel-amber);
  line-height: 1.2;
}
.page-products .exp-fact__label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mel-muted);
}

/* ---------- 主栅格：索引条 + 内容流 ---------- */
.page-products .exp-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-bottom: 68px;
  align-items: start;
}

.page-products .exp-rail {
  position: static;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-products .exp-rail::-webkit-scrollbar {
  display: none;
}
.page-products .exp-rail__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--pp-line);
  border-radius: 999px;
  background: rgba(21, 30, 69, 0.6);
  color: var(--mel-muted);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition:
    color 200ms var(--pp-ease),
    border-color 200ms var(--pp-ease),
    background-color 200ms var(--pp-ease),
    transform 200ms var(--pp-ease);
}
.page-products .exp-rail__num {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mel-orange);
}
.page-products .exp-rail__item:hover,
.page-products .exp-rail__item:focus-visible {
  color: var(--mel-paper);
  border-color: var(--pp-line-strong);
  background: rgba(36, 26, 85, 0.85);
  transform: translateY(-3px);
  outline: none;
}

.page-products .exp-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-products .exp-step {
  padding: 30px 0 6px;
  scroll-margin-top: 96px;
}
.page-products .exp-step + .exp-step {
  margin-top: 22px;
}
.page-products .exp-step--teal {
  border-radius: var(--pp-radius);
  background: linear-gradient(180deg, rgba(14, 59, 62, 0.72) 0%, rgba(14, 59, 62, 0.2) 100%);
  border: 1px solid rgba(53, 224, 224, 0.18);
  padding: 28px 20px 30px;
}
.page-products .exp-step--wine {
  border-radius: var(--pp-radius);
  background: linear-gradient(180deg, rgba(74, 18, 48, 0.62) 0%, rgba(11, 18, 51, 0.25) 100%);
  border: 1px solid rgba(255, 62, 165, 0.22);
  padding: 28px 20px 30px;
}
.page-products .exp-step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px dashed var(--pp-line);
}
.page-products .exp-step__num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mel-orange);
}
.page-products .exp-step__title {
  margin: 0;
  font-family: var(--mel-font-sans);
  font-weight: 300;
  font-size: clamp(1.35rem, 5.6vw, 2rem);
  line-height: 1.2;
  color: var(--mel-paper);
}

/* ---------- 图文分栏 ---------- */
.page-products .exp-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}
.page-products .exp-body {
  min-width: 0;
}

.page-products .exp-media {
  margin: 0;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--pp-line);
  background: rgba(11, 18, 51, 0.6);
}
.page-products .exp-media .mel-media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-products .exp-media .mel-media__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--mel-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mel-muted);
  border-top: 1px solid var(--pp-line);
}

/* ---------- 技能树 ---------- */
.page-products .exp-tree {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-products .exp-node {
  position: relative;
  padding-left: 56px;
  padding-bottom: 24px;
}
.page-products .exp-node:last-child {
  padding-bottom: 0;
}
.page-products .exp-node::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 42px;
  bottom: 0;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--mel-cyan), rgba(255, 106, 26, 0.35));
}
.page-products .exp-node:last-child::before {
  display: none;
}
.page-products .exp-node__dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 13px;
  color: var(--mel-ink);
  background: var(--mel-orange);
  box-shadow: 0 0 0 6px rgba(255, 106, 26, 0.12);
}
.page-products .exp-node:nth-child(2) .exp-node__dot {
  background: var(--mel-cyan);
  box-shadow: 0 0 0 6px rgba(53, 224, 224, 0.12);
}
.page-products .exp-node:nth-child(3) .exp-node__dot {
  background: var(--mel-amber);
  box-shadow: 0 0 0 6px rgba(255, 194, 75, 0.12);
}
.page-products .exp-node__body {
  border: 1px solid var(--pp-line);
  border-radius: 20px;
  padding: 14px 16px;
  background: var(--pp-card);
  transition: transform 200ms var(--pp-ease), border-color 200ms var(--pp-ease);
}
.page-products .exp-node__body:hover {
  transform: translateY(-4px);
  border-color: var(--pp-line-strong);
}
.page-products .exp-node__title {
  margin: 0 0 6px;
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--mel-paper);
}
.page-products .exp-node__text {
  margin: 0 0 8px;
  font-size: 15.5px;
  line-height: 1.72;
  color: #c9d2f0;
}
.page-products .exp-node__meta {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mel-muted);
}

/* ---------- 卡片 ---------- */
.page-products .exp-card {
  position: relative;
  border: 1px solid var(--pp-line);
  border-radius: 24px;
  padding: 18px 18px 20px;
  background: var(--pp-card);
  transition: transform 200ms var(--pp-ease), border-color 200ms var(--pp-ease);
}
.page-products .exp-card + .exp-card {
  margin-top: 14px;
}
.page-products .exp-card:hover {
  transform: translateY(-4px);
  border-color: var(--pp-line-strong);
}
.page-products .exp-card--violet {
  background: linear-gradient(160deg, rgba(36, 26, 85, 0.9) 0%, rgba(21, 30, 69, 0.9) 100%);
  border-color: rgba(53, 224, 224, 0.32);
}
.page-products .exp-card--amber {
  background: linear-gradient(160deg, rgba(74, 18, 48, 0.75) 0%, rgba(21, 30, 69, 0.9) 100%);
  border-color: rgba(255, 194, 75, 0.34);
}
.page-products .exp-card--ink {
  background: rgba(11, 18, 51, 0.82);
  border-color: rgba(255, 106, 26, 0.32);
}
.page-products .exp-card__title {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mel-paper);
}
.page-products .exp-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: #c9d2f0;
}

/* ---------- 索引列表 ---------- */
.page-products .exp-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-products .exp-list__item {
  display: flex;
  gap: 11px;
  padding: 9px 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: #c9d2f0;
  border-top: 1px solid var(--pp-line);
}
.page-products .exp-list__item:first-child {
  border-top: none;
  padding-top: 0;
}
.page-products .exp-list__num {
  flex: 0 0 auto;
  min-width: 22px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mel-cyan);
  padding-top: 4px;
}

/* ---------- 城市索引 ---------- */
.page-products .exp-city {
  margin: 20px 0;
  border: 1px solid var(--pp-line);
  border-radius: 22px;
  padding: 16px 16px 18px;
  background: rgba(11, 18, 51, 0.5);
}
.page-products .exp-city__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.page-products .exp-city__total {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mel-amber);
}
.page-products .exp-city__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}
.page-products .exp-city__pill {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(53, 224, 224, 0.42);
  background: rgba(14, 59, 62, 0.72);
  color: var(--mel-paper);
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: transform 200ms var(--pp-ease), border-color 200ms var(--pp-ease);
}
.page-products .exp-city__pill:hover {
  transform: translateY(-3px);
  border-color: var(--mel-cyan);
}
.page-products .exp-city__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: #b9c3e6;
}

/* ---------- 编号结构 ---------- */
.page-products .exp-code {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 20px 0 10px;
}
.page-products .exp-code__cell {
  min-width: 34px;
  height: 44px;
  padding: 0 7px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--pp-line);
  background: rgba(11, 18, 51, 0.75);
  font-family: var(--mel-font-mono);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--mel-cyan);
}
.page-products .exp-code__cell--alpha {
  background: var(--mel-cyan);
  border-color: var(--mel-cyan);
  color: var(--mel-ink);
  font-weight: 600;
}
.page-products .exp-code__dash {
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--mel-muted);
}
.page-products .exp-code__cap {
  margin: 0 0 20px;
  font-family: var(--mel-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--mel-muted);
}
.page-products .exp-copyrow {
  margin-top: 14px;
}

/* ---------- 版本时间线 ---------- */
.page-products .exp-log {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-left: 2px solid rgba(255, 62, 165, 0.42);
}
.page-products .exp-log__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 22px 20px;
}
.page-products .exp-log__item:last-child {
  padding-bottom: 0;
}
.page-products .exp-log__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--mel-ink);
  border: 2px solid var(--mel-magenta);
}
.page-products .exp-log__item--now::before {
  border-color: var(--mel-amber);
  background: var(--mel-amber);
}
.page-products .exp-log__year {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--mel-amber);
}
.page-products .exp-log__title {
  margin: 0 0 5px;
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--mel-paper);
}
.page-products .exp-log__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: #c2cbec;
}

/* ---------- 手风琴 ---------- */
.page-products .exp-accs {
  margin-top: 4px;
}
.page-products .exp-acc {
  border: 1px solid var(--pp-line);
  border-radius: 18px;
  background: rgba(21, 30, 69, 0.55);
  padding: 0 16px;
  margin-bottom: 10px;
  transition: border-color 200ms var(--pp-ease), background-color 200ms var(--pp-ease);
}
.page-products .exp-acc[open] {
  border-color: rgba(255, 106, 26, 0.55);
  background: rgba(21, 30, 69, 0.82);
}
.page-products .exp-acc__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--mel-paper);
}
.page-products .exp-acc__q::-webkit-details-marker {
  display: none;
}
.page-products .exp-acc__q::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--mel-font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--mel-orange);
}
.page-products .exp-acc[open] .exp-acc__q::before {
  content: "–";
}
.page-products .exp-acc__a {
  margin: 0;
  padding: 0 0 17px 26px;
  font-size: 14.8px;
  line-height: 1.76;
  color: #c0c9e9;
}

/* ---------- 收尾 ---------- */
.page-products .exp-outro {
  margin-top: 22px;
  border: 1px solid var(--pp-line);
  border-radius: 22px;
  padding: 18px 18px 20px;
  background: linear-gradient(150deg, rgba(36, 26, 85, 0.6) 0%, rgba(11, 18, 51, 0.4) 100%);
}
.page-products .exp-outro__text {
  margin: 0;
  font-size: 15.2px;
  line-height: 1.78;
  color: #c5ceee;
}

/* ---------- 正文与旁注 ---------- */
.page-products .exp-prose {
  margin: 0 0 18px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: #c9d2f0;
}
.page-products .exp-prose--wide {
  max-width: 44em;
}
.page-products .exp-tail-note {
  margin: 20px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--mel-muted);
  border-radius: 0 12px 12px 0;
  background: rgba(11, 18, 51, 0.4);
  font-size: 14.5px;
  line-height: 1.76;
  color: #aab5da;
}

/* ---------- 链接态 ---------- */
.page-products a {
  color: var(--mel-cyan);
  text-decoration-color: rgba(53, 224, 224, 0.45);
  text-underline-offset: 3px;
}
.page-products a:hover,
.page-products a:focus-visible {
  color: var(--mel-amber);
  text-decoration-color: rgba(255, 194, 75, 0.6);
}

/* ============ 断点 ============ */

@media (min-width: 700px) {
  .page-products .exp-hero {
    padding: 30px 0 52px;
  }
  .page-products .exp-hero__inner {
    padding: 40px 36px 36px;
  }
  .page-products .exp-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
  .page-products .exp-step--teal,
  .page-products .exp-step--wine {
    padding: 32px 28px 34px;
  }
  .page-products .exp-log__item {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }
  .page-products .exp-log__year {
    padding-top: 3px;
  }
  .page-products .exp-code__cell {
    min-width: 38px;
    height: 48px;
    font-size: 18px;
  }
}

@media (min-width: 1000px) {
  .page-products .exp-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 46px;
  }
  .page-products .exp-rail {
    position: sticky;
    top: 88px;
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-products .exp-rail__item {
    width: 100%;
    border-radius: 14px;
    padding: 12px 14px;
    white-space: normal;
    align-items: flex-start;
    box-sizing: border-box;
  }
  .page-products .exp-rail__num {
    padding-top: 2px;
  }
  .page-products .exp-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 34px;
    align-items: start;
  }
  .page-products .exp-split--reverse {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  }
  .page-products .exp-node {
    padding-left: 62px;
  }
  .page-products .exp-media--wide {
    margin-top: 28px;
  }
  .page-products .exp-card {
    padding: 22px 22px 24px;
  }
  .page-products .exp-acc {
    padding: 0 20px;
  }
}

@media (min-width: 1240px) {
  .page-products .exp-hero__title {
    max-width: 15ch;
  }
  .page-products .exp-prose {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .exp-rail__item,
  .page-products .exp-node__body,
  .page-products .exp-card,
  .page-products .exp-city__pill,
  .page-products .exp-acc {
    transition: none;
  }
  .page-products .exp-rail__item:hover,
  .page-products .exp-node__body:hover,
  .page-products .exp-card:hover,
  .page-products .exp-city__pill:hover {
    transform: none;
  }
}
<<<END>>>