.page-products {
  --dl-rail-w: 232px;
  --dl-gap: 64px;
  --dl-section-gap: 96px;
}

@media (min-width: 1024px) {
  .page-products {
    --dl-section-gap: 128px;
  }
}

/* ---------- 首屏 ---------- */
.page-products .dl-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--ink-line);
  background:
    radial-gradient(120% 92% at 86% 4%, rgba(111, 233, 255, 0.13), transparent 58%),
    radial-gradient(90% 84% at 100% 100%, rgba(255, 107, 44, 0.11), transparent 62%),
    var(--ink-deep);
}

.page-products .dl-hero__inner {
  display: grid;
  gap: 40px;
  padding-block: 44px 56px;
}

@media (min-width: 900px) {
  .page-products .dl-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 56px;
    padding-block: 68px 80px;
  }
}

.page-products .dl-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-products .dl-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-products .dl-hero__lead {
  max-width: 46ch;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 纯 CSS 主题视觉 */
.page-products .dl-visual {
  position: relative;
  min-height: 236px;
  aspect-ratio: 5 / 4;
  border: 1px solid rgba(111, 233, 255, 0.22);
  border-radius: 20px;
  overflow: hidden;
  background:
    linear-gradient(rgba(111, 233, 255, 0.075) 1px, transparent 1px) 0 0 / 100% 40px,
    linear-gradient(90deg, rgba(111, 233, 255, 0.075) 1px, transparent 1px) 0 0 / 40px 100%,
    radial-gradient(72% 62% at 68% 28%, rgba(111, 233, 255, 0.16), transparent 72%),
    radial-gradient(58% 54% at 22% 92%, rgba(255, 107, 44, 0.14), transparent 70%),
    var(--ink-base);
  animation: dl-drift 40s linear infinite;
}

@keyframes dl-drift {
  from { background-position: 0 0, 0 0, 68% 28%, 22% 92%, 0 0; }
  to { background-position: 0 40px, 40px 0, 68% 28%, 22% 92%, 0 0; }
}

.page-products .dl-visual__frame {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 6px;
  width: 62%;
  max-width: 240px;
  padding: 20px 20px 16px;
  border: 1px solid rgba(111, 233, 255, 0.3);
  border-radius: 14px;
  background: rgba(6, 11, 24, 0.62);
  backdrop-filter: blur(6px);
}

.page-products .dl-visual__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
}

.page-products .dl-visual__num {
  font-family: var(--font-num);
  font-size: clamp(44px, 12vw, 68px);
  line-height: 0.95;
  color: var(--heat);
  font-variant-numeric: tabular-nums;
}

.page-products .dl-visual__unit {
  font-size: 13px;
  color: var(--mist);
}

.page-products .dl-visual__bars {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 34px;
  margin-top: 8px;
}

.page-products .dl-visual__bars i {
  flex: 1;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(111, 233, 255, 0.85), rgba(111, 233, 255, 0.16));
}

.page-products .dl-visual__bars i:nth-child(1) { height: 46%; }
.page-products .dl-visual__bars i:nth-child(2) { height: 78%; background: linear-gradient(180deg, var(--amber), rgba(255, 201, 77, 0.16)); }
.page-products .dl-visual__bars i:nth-child(3) { height: 60%; }
.page-products .dl-visual__bars i:nth-child(4) { height: 96%; background: linear-gradient(180deg, var(--heat), rgba(255, 107, 44, 0.16)); }
.page-products .dl-visual__bars i:nth-child(5) { height: 34%; }

.page-products .dl-visual__node {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(111, 233, 255, 0.14);
  animation: dl-pulse 3.2s var(--ease) infinite;
}

.page-products .dl-visual__node--a { left: 12%; top: 20%; }
.page-products .dl-visual__node--b { left: 22%; bottom: 16%; background: var(--heat); box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.16); animation-delay: 0.9s; }
.page-products .dl-visual__node--c { right: 12%; bottom: 24%; background: var(--violet); box-shadow: 0 0 0 4px rgba(185, 168, 255, 0.16); animation-delay: 1.8s; }

@keyframes dl-pulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.4); opacity: 0.55; }
}

/* ---------- 主体骨架 ---------- */
.page-products .dl-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-block: 40px 88px;
}

@media (min-width: 1024px) {
  .page-products .dl-layout {
    grid-template-columns: var(--dl-rail-w) minmax(0, 1fr);
    gap: var(--dl-gap);
    align-items: start;
    padding-block: 56px 104px;
  }
}

.page-products .dl-main {
  min-width: 0;
}

/* ---------- 左侧下载轨道 ---------- */
.page-products .dl-rail {
  display: grid;
  gap: 20px;
  padding: 20px;
  border: 1px solid var(--ink-line);
  border-radius: 16px;
  background: var(--ink-base);
}

@media (min-width: 1024px) {
  .page-products .dl-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border-color: rgba(111, 233, 255, 0.18);
    background:
      linear-gradient(180deg, rgba(111, 233, 255, 0.07), transparent 42%),
      var(--ink-base);
  }
}

.page-products .dl-rail__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-products .dl-rail__current {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
}

.page-products .dl-rail__current .num {
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-products .dl-rail__prev {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-rail__prev .num {
  font-family: var(--font-mono);
  color: var(--paper);
}

.page-products .dl-rail__nav {
  display: grid;
  gap: 2px;
  padding-block: 16px;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
}

.page-products .dl-rail__nav a {
  position: relative;
  display: block;
  padding: 8px 0 8px 16px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-products .dl-rail__nav a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--ink-line);
  transition: background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-products .dl-rail__nav a:hover,
.page-products .dl-rail__nav a:focus-visible {
  color: var(--cyan);
}

.page-products .dl-rail__nav a:hover::before,
.page-products .dl-rail__nav a:focus-visible::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(111, 233, 255, 0.16);
}

.page-products .dl-rail__block--req {
  padding-top: 4px;
}

.page-products .dl-rail__req {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-rail .copy-btn {
  width: 100%;
}

/* ---------- 章节通用 ---------- */
.page-products .dl-section {
  margin-bottom: var(--dl-section-gap);
}

.page-products .dl-section:last-child {
  margin-bottom: 0;
}

.page-products .coord__label {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-products .dl-section .section__lead {
  max-width: 56ch;
}

/* ---------- 版本选择 ---------- */
.page-products .dl-versions {
  margin-top: 28px;
}

.page-products .dl-version {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 20px;
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-products .dl-version:hover {
  transform: translateY(-2px);
  border-color: rgba(111, 233, 255, 0.5);
}

.page-products .dl-version__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.page-products .dl-version .card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 21px;
  color: var(--paper);
}

.page-products .dl-version__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-version__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--ink-line);
}

.page-products .dl-version__meta div {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-products .dl-version__meta dt {
  font-size: 12px;
  color: var(--mist);
}

.page-products .dl-version__meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-products .dl-version__meta dd.num {
  font-family: var(--font-num);
  font-size: 20px;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-products .dl-version .btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ---------- 网页版直连 ---------- */
.page-products .dl-web {
  margin-top: 28px;
  align-items: start;
}

.page-products .dl-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-products .dl-steps__item {
  position: relative;
  padding: 0 0 26px 46px;
  border-left: 1px solid var(--ink-line);
  margin-left: 13px;
}

.page-products .dl-steps__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-products .dl-steps__idx {
  position: absolute;
  left: -14px;
  top: 0;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(111, 233, 255, 0.4);
  background: var(--ink-deep);
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-products .dl-steps__item h3 {
  margin: 2px 0 8px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--paper);
}

.page-products .dl-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-note {
  padding: 24px 22px;
}

.page-products .dl-note__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--cyan);
}

.page-products .dl-note__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-products .dl-note__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--cyan);
}

/* ---------- 小屏与低配置 ---------- */
.page-products .dl-screen {
  margin-top: 28px;
  align-items: start;
}

.page-products .dl-screen__copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-facts {
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--ink-line);
}

.page-products .dl-facts li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-products .dl-facts .num {
  display: inline-block;
  min-width: 2.4em;
  font-family: var(--font-num);
  font-size: 24px;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-products .dl-screen__fig .media-frame__img,
.page-products .dl-install__fig .media-frame__img,
.page-products .dl-fav__figs .media-frame__img,
.page-products .dl-req__fig .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 收藏与重点场次 ---------- */
.page-products .dl-fav {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-products .dl-fav {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

.page-products .dl-fav__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-fav__text p:last-child {
  margin-bottom: 0;
}

.page-products .dl-sync {
  padding: 22px 20px;
  border-radius: 16px;
  border: 1px solid rgba(255, 107, 44, 0.28);
  background:
    linear-gradient(180deg, rgba(255, 107, 44, 0.09), transparent 60%),
    var(--ink-base);
}

.page-products .dl-sync__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--paper);
}

.page-products .dl-sync__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-products .dl-sync__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-sync__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--heat);
}

.page-products .dl-sync__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 107, 44, 0.3);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-fav__figs {
  margin-top: 28px;
}

.page-products .dl-fav__figs .media-frame {
  aspect-ratio: 14 / 9;
}

/* ---------- 安装与升级 ---------- */
.page-products .dl-install {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

@media (min-width: 1024px) {
  .page-products .dl-install {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
}

.page-products .dl-accordion-group {
  display: grid;
  gap: 10px;
}

.page-products .dl-accordion-group .accordion {
  border: 1px solid var(--ink-line);
  border-radius: 12px;
  background: var(--ink-base);
  overflow: hidden;
}

.page-products .dl-accordion-group .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
  text-align: left;
  cursor: pointer;
}

.page-products .dl-accordion-group .accordion__trigger:hover {
  color: var(--cyan);
}

.page-products .dl-step-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-products .dl-accordion-group .accordion__inner {
  padding: 0 18px 18px 46px;
}

.page-products .dl-accordion-group .accordion__inner p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-accordion-group .accordion__inner p:last-child {
  margin-bottom: 0;
}

.page-products .dl-install__fig .media-frame__img {
  object-fit: contain;
  background: var(--ink-base);
}

.page-products .dl-install__more {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ink-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-install__more a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 系统要求 ---------- */
.page-products .dl-req-table-wrap {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--ink-line);
  border-radius: 14px;
  background: var(--ink-base);
}

.page-products .dl-req-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.page-products .dl-req-table th,
.page-products .dl-req-table td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  line-height: 1.6;
  border-bottom: 1px solid var(--ink-line);
}

.page-products .dl-req-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  background: rgba(111, 233, 255, 0.05);
}

.page-products .dl-req-table tbody th {
  font-weight: 500;
  color: var(--paper);
  white-space: nowrap;
}

.page-products .dl-req-table tbody td {
  color: var(--mist);
}

.page-products .dl-req-table tbody tr:last-child th,
.page-products .dl-req-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .dl-req-table tbody tr:hover td,
.page-products .dl-req-table tbody tr:hover th {
  background: rgba(111, 233, 255, 0.04);
}

.page-products .dl-compat {
  margin-top: 24px;
}

.page-products .dl-compat__item {
  padding: 18px;
}

.page-products .dl-compat__item .card__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--paper);
}

.page-products .dl-compat__state {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-products .dl-compat__state.is-on {
  border: 1px solid rgba(185, 168, 255, 0.5);
  background: rgba(185, 168, 255, 0.14);
  color: var(--violet);
}

.page-products .dl-compat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .dl-req__fig {
  margin-top: 32px;
}

/* ---------- 收束 ---------- */
.page-products .dl-outro {
  border-top: 1px solid var(--ink-line);
  background:
    radial-gradient(100% 140% at 88% 0%, rgba(255, 107, 44, 0.12), transparent 60%),
    var(--ink-base);
}

.page-products .dl-outro__inner {
  display: grid;
  gap: 24px;
  padding-block: 48px 56px;
}

@media (min-width: 860px) {
  .page-products .dl-outro__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
  }
}

.page-products .dl-outro__copy h2 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 3.6vw, 30px);
  color: var(--paper);
}

.page-products .dl-outro__copy p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .dl-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .backtop {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 20;
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products .dl-visual,
  .page-products .dl-visual__node {
    animation: none;
  }
  .page-products .dl-version:hover {
    transform: none;
  }
}
<<<END>>>