.page-products {
  --pp-gold: #D4AF37;
  --pp-coral: #FF7F50;
  --pp-pearl: #F8F7F4;
  --pp-deep: #0B2036;
  --pp-mid: #123B5C;
  --pp-ink: #0A1420;
  --pp-sand: #E8DCC8;
  --pp-cyan: #7FB3D5;
  --pp-shadow: 0 8px 24px rgba(10, 20, 32, 0.3);
  --pp-radius: 14px;
  --pp-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ===== 页面头 ===== */
.page-products__head {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 4rem;
  background: linear-gradient(160deg, var(--pp-deep) 0%, var(--pp-mid) 100%);
}

.page-products__head::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 78% 30%, rgba(212, 175, 55, 0.22) 0%, rgba(255, 127, 80, 0.08) 45%, transparent 70%);
  pointer-events: none;
}

.page-products__head::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

.page-products__head-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.page-products__head-copy {
  max-width: 760px;
}

.page-products__head-title {
  margin: 1rem 0 1.25rem;
  color: var(--pp-pearl);
}

.page-products__head-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-top: 2rem;
}

.page-products__head-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.page-products__head-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  width: 100%;
  max-width: 420px;
}

.page-products__stat {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.125rem 0.875rem;
  text-align: center;
  backdrop-filter: blur(8px);
}

.page-products__stat .stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--pp-gold);
  line-height: 1.1;
}

.page-products__stat .stat__label {
  display: block;
  font-size: var(--fs-micro);
  color: var(--pp-pearl);
  opacity: 0.78;
  letter-spacing: 0.06em;
  margin-top: 0.4rem;
}

/* CSS 视觉圆环 */
.page-products__orb {
  position: relative;
  width: 220px;
  height: 220px;
}

.page-products__orb-ring {
  position: absolute;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
}

.page-products__orb-ring--1 {
  width: 220px;
  height: 220px;
  border: 1px solid rgba(212, 175, 55, 0.45);
  animation: pp-orbit-pulse 4s var(--pp-ease) infinite;
}

.page-products__orb-ring--2 {
  width: 170px;
  height: 170px;
  border: 1px dashed rgba(212, 175, 55, 0.4);
  animation: pp-orbit-rotate 14s linear infinite;
}

.page-products__orb-ring--3 {
  width: 120px;
  height: 120px;
  border: 1px solid rgba(255, 127, 80, 0.35);
}

.page-products__orb-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pp-gold) 0%, var(--pp-coral) 100%);
  box-shadow: 0 0 40px rgba(212, 175, 55, 0.45);
}

/* ===== 方案概览 ===== */
.page-products__overview {
  background: linear-gradient(180deg, var(--pp-deep) 0%, #102c45 100%);
  color: var(--pp-pearl);
}

.page-products__figure {
  margin: 2rem 0 0;
  line-height: 0;
}

.page-products__figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--pp-shadow);
  object-fit: cover;
}

.page-products__figure--arch {
  margin-top: 2.5rem;
}

.page-products__scenes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.page-products__scene-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
}

.page-products__scene-card .card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  font-weight: 700;
  margin: 0;
}

.page-products__scene-card .card__body {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
  flex: 1;
}

.page-products__scene-card .card__link {
  color: var(--pp-coral);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: 500;
  transition: color 0.2s ease;
}

.page-products__scene-card .card__link:hover {
  color: var(--pp-gold);
}

/* ===== V3中心 ===== */
.page-products__v3 {
  background: linear-gradient(140deg, #0f3047 0%, #17496f 100%);
  color: var(--pp-pearl);
}

.page-products__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
}

.page-products__split-copy .section-lead,
.page-products__v3-note {
  color: rgba(248, 247, 244, 0.78);
}

.page-products__steps {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

.page-products__steps::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  bottom: 1.25rem;
  left: 1.125rem;
  width: 1px;
  background: linear-gradient(180deg, var(--pp-gold), var(--pp-coral));
}

.page-products__step {
  position: relative;
  display: flex;
  gap: 1.25rem;
  padding: 0.875rem 0;
}

.page-products__step-num {
  flex: 0 0 2.25rem;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--pp-gold);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--pp-gold);
  background: rgba(212, 175, 55, 0.1);
}

.page-products__step-body strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  color: var(--pp-pearl);
  margin-bottom: 0.375rem;
}

.page-products__step-body p {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: rgba(248, 247, 244, 0.78);
}

.page-products__v3-note {
  margin-top: 1.5rem;
  font-size: var(--fs-small);
}

.page-products__v3-note a,
.page-products__download-actions a {
  color: var(--pp-coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 127, 80, 0.35);
  transition: border-color 0.2s ease;
}

.page-products__v3-note a:hover,
.page-products__download-actions a:hover {
  border-color: var(--pp-coral);
}

.page-products__split-visual {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-products__figure--v3 {
  margin: 0;
}

.page-products__accordion {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  overflow: hidden;
}

.page-products__accordion .accordion__summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--pp-gold);
  list-style: none;
  transition: background 0.2s ease;
}

.page-products__accordion .accordion__summary::-webkit-details-marker {
  display: none;
}

.page-products__accordion .accordion__summary::after {
  content: "+";
  float: right;
  font-size: 1.2rem;
  color: var(--pp-coral);
  transition: transform 0.25s var(--pp-ease);
}

.page-products__accordion[open] .accordion__summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-products__accordion .accordion__content {
  padding: 0 1.25rem 1.25rem;
  font-size: var(--fs-body);
  line-height: 1.7;
}

.page-products__advantage-list {
  margin: 0;
  padding-left: 1.25rem;
}

.page-products__advantage-list li {
  margin-bottom: 0.5rem;
}

/* ===== 版本对比 ===== */
.page-products__compare {
  background: var(--pp-pearl);
  color: var(--pp-ink);
}

.page-products__compare .section-lead {
  color: rgba(26, 42, 58, 0.7);
}

.page-products__figure--compare {
  margin: 2.5rem 0 0;
}

.page-products__figure--compare img {
  border: 1px solid var(--pp-sand);
}

.page-products__compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.25rem;
}

.page-products__compare-col {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem;
  background: #fff;
  border: 1px solid var(--pp-sand);
  border-radius: var(--radius-md);
  transition: box-shadow 0.25s var(--pp-ease), border-color 0.25s ease;
}

.page-products__compare-col:hover {
  border-color: var(--pp-gold);
  box-shadow: var(--pp-shadow);
}

.page-products__compare-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--pp-deep);
  color: var(--pp-gold);
  font-family: var(--font-display);
  font-size: var(--fs-micro);
  font-weight: 700;
  margin-bottom: 0.875rem;
}

.page-products__compare-title {
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  font-weight: 700;
  margin: 0 0 0.625rem;
}

.page-products__compare-col p {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
}

.page-products__tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--pp-sand);
}

/* ===== 额度与设置 ===== */
.page-products__settings {
  background: var(--pp-sand);
  color: var(--pp-ink);
}

.page-products__settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
}

.page-products__settings-copy {
  max-width: 720px;
}

.page-products__settings-copy .accordion__item {
  border: 1px solid rgba(212, 175, 55, 0.5);
  background: rgba(248, 247, 244, 0.65);
  backdrop-filter: blur(6px);
  margin-bottom: 0.75rem;
}

.page-products__settings-copy .accordion__summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--pp-deep);
  list-style: none;
}

.page-products__settings-copy .accordion__summary::-webkit-details-marker {
  display: none;
}

.page-products__settings-copy .accordion__summary::after {
  content: "+";
  float: right;
  font-size: 1.2rem;
  color: var(--pp-coral);
  transition: transform 0.25s var(--pp-ease);
}

.page-products__settings-copy .accordion__item[open] .accordion__summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-products__settings-copy .accordion__content {
  padding: 0 1.25rem 1.25rem;
  font-size: var(--fs-body);
  line-height: 1.7;
}

.page-products__settings-copy .accordion__content a {
  color: var(--pp-coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 127, 80, 0.35);
}

.page-products__figure--gauge {
  margin: 0;
}

.page-products__figure--gauge img {
  max-width: min(100%, 480px);
  margin: 0 auto;
  display: block;
}

/* ===== 下载区域 ===== */
.page-products__download {
  background: linear-gradient(150deg, var(--pp-ink) 0%, #0d1d2e 100%);
  color: var(--pp-pearl);
}

.page-products__download-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.page-products__download-copy .section-lead {
  color: rgba(248, 247, 244, 0.78);
}

.page-products__download-list {
  list-style: none;
  margin: 1.75rem 0 2rem;
  padding: 0;
}

.page-products__download-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.875rem;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: rgba(248, 247, 244, 0.85);
}

.page-products__download-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pp-gold);
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.6);
}

.page-products__download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.page-products__figure--flow {
  margin: 0;
}

.page-products__figure--flow img {
  border: 1px solid rgba(212, 175, 55, 0.18);
}

/* ===== 标签筛选（CSS-only） ===== */
.page-products__filter {
  margin-top: 2rem;
  position: relative;
}

.page-products__filter-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.page-products__filter-btn {
  cursor: pointer;
  padding: 0.5rem 1rem;
  border: 1px solid var(--pp-sand);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-display);
  font-size: var(--fs-micro);
  font-weight: 500;
  color: var(--pp-ink);
  transition: all 0.2s ease;
}

.page-products__filter-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.page-products__filter-input:checked + .page-products__filter-btn {
  background: var(--pp-deep);
  color: var(--pp-gold);
  border-color: var(--pp-deep);
}

.page-products__filter-grid {
  display: none;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-products__filter-input--all:checked ~ .page-products__filter-grid {
  display: grid;
}

.page-products__filter-input--ui:checked ~ .page-products__filter-grid .page-products__filter-card--ui {
  display: grid;
}

.page-products__filter-input--feature:checked ~ .page-products__filter-grid .page-products__filter-card--feature {
  display: grid;
}

.page-products__filter-card {
  background: #fff;
  border: 1px solid var(--pp-sand);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-size: var(--fs-body);
  line-height: 1.6;
}

.page-products__filter-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  color: var(--pp-deep);
  margin-bottom: 0.25rem;
}

/* ===== 动画 ===== */
@keyframes pp-orbit-rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes pp-orbit-pulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .page-products__orb-ring {
    animation: none !important;
  }
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-products__head {
    padding-bottom: 5rem;
  }

  .page-products__head-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }

  .page-products__scenes {
    grid-template-columns: 1.1fr 0.95fr 0.95fr;
    gap: 1.5rem;
  }

  .page-products__split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-products__compare-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .page-products__settings-grid {
    grid-template-columns: 1fr 0.8fr;
    gap: 3rem;
  }

  .page-products__download-grid {
    grid-template-columns: 1fr 0.85fr;
    gap: 3rem;
  }

  .page-products__head-stats {
    max-width: 430px;
  }

  .page-products__figure--arch {
    margin-top: 3rem;
  }
}

@media (min-width: 1200px) {
  .page-products__head {
    padding-top: calc(var(--header-h) + 4.5rem);
  }

  .page-products__head-title {
    font-size: var(--fs-hero);
    max-width: 720px;
  }

  .page-products__orb {
    width: 260px;
    height: 260px;
  }

  .page-products__orb-ring--1 {
    width: 260px;
    height: 260px;
  }

  .page-products__orb-ring--2 {
    width: 205px;
    height: 205px;
  }

  .page-products__orb-ring--3 {
    width: 145px;
    height: 145px;
  }

  .page-products__orb-core {
    width: 84px;
    height: 84px;
  }

  .page-products__filter-grid {
    grid-template-columns: 1fr 1fr;
  }
}
```