.page-products {
  --pd-max: 1280px;
  --pd-gap: clamp(24px, 4vw, 48px);
  --pd-pad: clamp(20px, 3vw, 36px);
  --pd-deep: #101f32;
  --pd-line: rgba(241, 244, 248, 0.12);
  --pd-card: rgba(16, 42, 60, 0.5);
  --pd-tint: rgba(230, 57, 70, 0.12);
}

/* ========== 面包屑 ========== */
.page-products .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--steel);
  margin-bottom: 18px;
}
.page-products .breadcrumb a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-products .breadcrumb a:hover {
  color: var(--blue-light);
}
.page-products .breadcrumb .sep {
  opacity: 0.55;
}

/* ========== 首屏下载面板 ========== */
.page-products .product-launch {
  display: grid;
  max-width: var(--pd-max);
  margin: 0 auto clamp(48px, 8vw, 84px);
  border: 1px solid var(--pd-line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--blue-black);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
}

.page-products .launch-copy {
  position: relative;
  padding: 40px 24px 32px;
  color: var(--light);
  background:
    linear-gradient(155deg, rgba(27, 20, 30, 0.15) 0%, rgba(0, 0, 0, 0) 45%),
    linear-gradient(135deg, var(--red-dark) 0%, var(--red) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
.page-products .launch-eyebrow {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 14px;
}
.page-products .launch-copy h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 0 0 18px;
  text-transform: uppercase;
}
.page-products .launch-lead {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 0 22px;
  max-width: 56ch;
}
.page-products .launch-metrics {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 0;
  margin: 0 0 20px;
}
.page-products .launch-metrics li {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  padding: 12px 12px 10px;
  background: rgba(181, 19, 36, 0.18);
}
.page-products .launch-metrics b {
  display: block;
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}
.page-products .launch-note {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

/* ========== 平台版本切换区 ========== */
.page-products .platform-download {
  padding: 28px 20px;
  background:
    linear-gradient(180deg, rgba(29, 53, 87, 0.52), rgba(11, 29, 46, 0.86)),
    var(--blue-black);
}
.page-products .platform-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
@media (min-width: 680px) {
  .page-products .platform-tabs {
    grid-template-columns: repeat(4, 1fr);
  }
}
.page-products .platform-radio {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}
.page-products .platform-tab {
  display: block;
  text-align: center;
  padding: 12px 4px;
  border: 1px solid var(--pd-line);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--steel);
  background: rgba(16, 42, 60, 0.5);
  border-radius: 3px;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.page-products .platform-tab:hover {
  border-color: var(--blue-light);
  color: var(--white);
  transform: translateY(-1px);
}
.page-products .platform-radio:checked + .platform-tab {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  box-shadow: 0 4px 0 rgba(181, 19, 36, 0.3);
}
.page-products .platform-radio:focus-visible + .platform-tab {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.page-products .platform-card {
  display: none;
  grid-column: 1 / -1;
  margin-top: 18px;
  padding: 24px 20px;
  border: 1px solid var(--pd-line);
  border-left: 3px solid var(--red);
  border-radius: 4px;
  background: rgba(29, 53, 87, 0.5);
}
.page-products #plat-win:checked ~ #plat-card-win,
.page-products #plat-mac:checked ~ #plat-card-mac,
.page-products #plat-ios:checked ~ #plat-card-ios,
.page-products #plat-android:checked ~ #plat-card-android {
  display: block;
}
.page-products .platform-symbol {
  display: inline-block;
  font-size: 30px;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0;
}
.page-products .platform-card h2 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 26px;
  margin: 6px 0 4px;
  color: var(--white);
  letter-spacing: 0.02em;
}
.page-products .platform-version {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--gold);
  margin: 0 0 16px;
}
.page-products .platform-specs {
  margin: 0 0 20px;
  padding: 0;
}
.page-products .spec-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14px;
}
.page-products .spec-row dt {
  color: var(--steel);
  white-space: nowrap;
}
.page-products .spec-row dd {
  margin: 0;
  color: var(--white);
  text-align: right;
}
.page-products .download-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 16px 20px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%);
  border: 1px solid var(--gold);
  border-radius: 3px;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-products .download-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(181, 19, 36, 0.35);
}
.page-products .download-cta:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.page-products .platform-footnote {
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
  margin: 16px 0 0;
}

/* ========== 编号章节通用结构 ========== */
.page-products .chapter-section {
  scroll-margin-top: 100px;
  max-width: var(--pd-max);
  margin: 0 auto;
  padding: clamp(40px, 7vw, 80px) 0 0;
}
.page-products .chapter-meta {
  position: relative;
  display: grid;
  gap: 4px;
  margin-bottom: 32px;
  padding-top: 34px;
  border-top: 1px solid var(--pd-line);
}
.page-products .chapter-num {
  position: absolute;
  top: -8px;
  right: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(58px, 10vw, 104px);
  line-height: 1;
  color: rgba(201, 162, 39, 0.32);
  -webkit-text-stroke: 1px rgba(201, 162, 39, 0.42);
  pointer-events: none;
}
.page-products .chapter-meta h2 {
  position: relative;
  z-index: 1;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--white);
  margin: 0;
  max-width: 14ch;
}
.page-products .chapter-sub {
  font-size: 15px;
  color: var(--steel);
  margin: 8px 0 0;
}
.page-products .chapter-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
.page-products .chapter-copy > p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--steel);
  margin: 0 0 16px;
}
.page-products .chapter-copy .chapter-more {
  margin-top: 20px;
  font-size: 14px;
}
.page-products .chapter-more a {
  color: var(--blue-light);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}
.page-products .chapter-more a:hover {
  color: var(--gold);
}

/* ========== 章节图文排布 ========== */
.page-products .chapter-media {
  position: relative;
  margin: 0;
  padding: 8px;
  background: linear-gradient(145deg, rgba(69, 123, 157, 0.25), rgba(11, 29, 46, 0.55));
  border-radius: 6px;
  border: 1px solid rgba(69, 123, 157, 0.28);
}
.page-products .chapter-media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 3px;
  border: 1px solid rgba(241, 244, 248, 0.08);
}
.page-products .chapter-media figcaption {
  padding: 10px 2px 2px;
  font-size: 12.5px;
  color: var(--steel);
}
.page-products #data-panel .chapter-media {
  border: 1px solid rgba(69, 123, 157, 0.55);
  border-radius: 8px;
  box-shadow:
    0 0 0 6px rgba(69, 123, 157, 0.08),
    0 18px 44px rgba(0, 0, 0, 0.28);
}
.page-products #data-panel .chapter-media::after {
  content: "";
  position: absolute;
  display: block;
  right: -6px;
  top: -6px;
  width: 46px;
  height: 46px;
  border-top: 2px solid var(--red);
  border-right: 2px solid var(--red);
  border-radius: 0 8px 0 0;
  opacity: 0.8;
  pointer-events: none;
}
@media (min-width: 960px) {
  .page-products .chapter-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 48px;
  }
  .page-products .chapter-alt .chapter-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }
  .page-products .chapter-body .chapter-copy {
    order: 1;
  }
  .page-products .chapter-body .chapter-media {
    order: 2;
  }
  .page-products .chapter-alt .chapter-body .chapter-copy {
    order: 2;
  }
  .page-products .chapter-alt .chapter-body .chapter-media {
    order: 1;
  }
}

/* ========== 能力清单 ========== */
.page-products .capability-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-products .capability-list li {
  position: relative;
  padding: 14px 16px 14px 44px;
  border-radius: 3px;
  color: var(--white);
  font-size: 15px;
  line-height: 1.7;
  background: linear-gradient(90deg, var(--pd-tint), rgba(16, 42, 60, 0.42));
  border-left: 3px solid var(--red);
}
.page-products .capability-list li strong {
  color: var(--white);
  font-weight: 600;
}
.page-products .capability-list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 12px;
  height: 12px;
  transform: translateY(-50%) rotate(45deg);
  background: var(--gold);
  border-radius: 2px;
}
.page-products .guide-link {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-products .guide-link .btn {
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 3px;
  font-weight: 600;
  font-size: 14px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-products .guide-link .btn-secondary {
  color: var(--white);
  background: rgba(16, 42, 60, 0.45);
  border: 1px solid var(--blue-light);
}
.page-products .guide-link .btn-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--red);
}
.page-products .guide-link .btn:focus-visible,
.page-products .download-cta:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ========== 三级检索演示 ========== */
.page-products .retrieval-demo {
  margin-top: 24px;
  border: 1px solid var(--pd-line);
  border-radius: 4px;
  background: rgba(8, 25, 40, 0.64);
  overflow: hidden;
}
.page-products .demo-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--steel);
  border-bottom: 1px solid var(--pd-line);
  background: rgba(16, 42, 60, 0.5);
}
.page-products .demo-dots::before {
  content: "●●●";
  letter-spacing: 3px;
  color: var(--red);
}
.page-products .demo-selects {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 14px;
}
@media (min-width: 720px) {
  .page-products .demo-selects {
    grid-template-columns: repeat(3, 1fr);
  }
}
.page-products .demo-select summary {
  cursor: pointer;
  list-style: none;
  padding: 14px;
  border: 1px solid var(--pd-line);
  border-radius: 3px;
  background: var(--glass);
  color: var(--white);
  font-size: 15px;
  transition: border-color 0.2s ease;
}
.page-products .demo-select summary::-webkit-details-marker,
.page-products .demo-select summary::marker {
  display: none;
  content: "";
}
.page-products .demo-select summary::after {
  content: "＋";
  float: right;
  font-weight: 700;
  color: var(--gold);
}
.page-products .demo-select summary:hover {
  border-color: var(--blue-light);
}
.page-products .demo-select[open] summary {
  border-color: rgba(69, 123, 157, 0.6);
}
.page-products .demo-select[open] summary::after {
  content: "－";
}
.page-products .demo-options {
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--steel);
  border: 1px solid var(--pd-line);
  border-top: 0;
  border-radius: 0 0 3px 3px;
  background: rgba(11, 29, 46, 0.7);
}
.page-products .demo-options p {
  margin: 0;
}
.page-products .demo-result {
  margin: 14px 14px 16px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--white);
  padding: 12px 14px;
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(230, 57, 70, 0.18), rgba(69, 123, 157, 0.12));
}

/* ========== 资料库筛选与列表 ========== */
.page-products .library-filter {
  display: grid;
  gap: 8px;
  margin-top: 24px;
}
.page-products .library-filter label {
  font-size: 13px;
  color: var(--steel);
}
.page-products .library-filter input {
  width: 100%;
  padding: 12px 14px;
  background: var(--pd-deep);
  border: 1px solid var(--pd-line);
  border-radius: 3px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.page-products .library-filter input::placeholder {
  color: var(--steel);
}
.page-products .library-filter input:focus {
  outline: none;
  border-color: var(--blue-light);
  box-shadow: 0 0 0 2px rgba(69, 123, 157, 0.22);
}
.page-products .library-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}
.page-products .library-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--pd-line);
  border-left: 3px solid var(--red);
  border-radius: 3px;
  background: rgba(16, 42, 60, 0.32);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.page-products .library-item:hover {
  transform: translateY(-2px);
  border-left-color: var(--gold);
}
.page-products .lib-main h3 {
  font-size: 16px;
  margin: 0 0 4px;
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 600;
}
.page-products .lib-main p {
  font-size: 13.5px;
  color: var(--steel);
  margin: 0;
}
.page-products .lib-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.page-products .lib-tags span {
  font-family: var(--font-data);
  font-size: 11px;
  padding: 4px 8px;
  border: 1px solid rgba(201, 162, 39, 0.6);
  border-radius: 2px;
  color: var(--gold);
}
.page-products .format-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(201, 162, 39, 0.08);
  border: 1px solid rgba(201, 162, 39, 0.22);
  border-radius: 3px;
}
.page-products .legend-item {
  font-size: 13px;
  color: var(--steel);
}
.page-products .legend-item b {
  color: var(--gold);
  font-family: var(--font-data);
}

/* ========== 收藏迁移步骤 ========== */
.page-products .migration-steps {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}
.page-products .migration-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--pd-line);
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(69, 123, 157, 0.12), rgba(16, 42, 60, 0.3));
}
.page-products .step-num {
  display: inline-block;
  width: 40px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 26px;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, 0.6);
  border-radius: 50%;
}
.page-products .migration-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 4px;
}
.page-products .migration-step p {
  font-size: 13.5px;
  color: var(--steel);
  margin: 0;
  line-height: 1.6;
}
.page-products .migration-tip {
  margin-top: 18px;
  border: 1px solid rgba(201, 162, 39, 0.3);
  border-radius: 3px;
  background: rgba(201, 162, 39, 0.06);
}
.page-products .migration-tip summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  color: var(--gold);
  font-weight: 600;
  font-size: 14px;
}
.page-products .migration-tip summary::-webkit-details-marker,
.page-products .migration-tip summary::marker {
  display: none;
  content: "";
}
.page-products .migration-tip summary::before {
  content: "＋ ";
}
.page-products .migration-tip[open] summary::before {
  content: "－ ";
}
.page-products .migration-tip p {
  padding: 0 16px 14px;
  margin: 0;
  font-size: 14px;
  color: var(--steel);
  line-height: 1.7;
}
.page-products .migration-tip p a {
  color: var(--blue-light);
}

/* ========== 系统兼容与版本更新 ========== */
.page-products .compact-body .chapter-copy {
  max-width: none;
}
.page-products .compat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 8px;
}
@media (min-width: 640px) {
  .page-products .compat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1020px) {
  .page-products .compat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.page-products .compat-card {
  padding: 22px 18px;
  border: 1px solid var(--pd-line);
  border-radius: 4px;
  background: linear-gradient(180deg, rgba(29, 53, 87, 0.42), rgba(16, 42, 60, 0.6));
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.page-products .compat-card:hover {
  transform: translateY(-2px);
  border-color: var(--red);
}
.page-products .compat-icon {
  font-size: 30px;
  line-height: 1.2;
  color: var(--red);
}
.page-products .compat-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--white);
  margin: 8px 0 4px;
  font-weight: 600;
}
.page-products .compat-card p {
  font-size: 13px;
  color: var(--steel);
  margin: 0;
  line-height: 1.6;
}
.page-products .changelog {
  margin-top: 28px;
  padding: 20px;
  border: 1px solid rgba(69, 123, 157, 0.3);
  border-radius: 4px;
  background: rgba(69, 123, 157, 0.08);
}
.page-products .changelog h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 12px;
  font-family: var(--font-body);
}
.page-products .changelog-item {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.page-products .changelog-item:last-child {
  border-bottom: 0;
}
.page-products .version-badge {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 13px;
  color: var(--blue-light);
  border: 1px solid rgba(69, 123, 157, 0.5);
  border-radius: 2px;
  padding: 3px 8px;
  white-space: nowrap;
}
.page-products .changelog-item p {
  margin: 0;
  font-size: 14px;
  color: var(--steel);
  line-height: 1.6;
}

/* ========== 桌面端启动区布局 ========== */
@media (min-width: 880px) {
  .page-products .product-launch {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-products .launch-copy {
    padding: 48px 40px;
    border-bottom: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
  }
  .page-products .platform-download {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 36px 32px;
  }
}

/* ========== 动效与可访问性 ========== */
@media (prefers-reduced-motion: reduce) {
  .page-products *,
  .page-products *::before,
  .page-products *::after {
    transition: none !important;
    animation: none !important;
  }
}