.page-products {
  --pp-sec-pad: clamp(40px, 6.4vw, 84px);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-850) 38%, var(--ink-900) 100%);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: clip;
}

.page-products img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-products .pp-hero {
  position: relative;
  padding: clamp(24px, 4vw, 52px) 0 clamp(34px, 5vw, 64px);
}

.page-products .pp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 92% at 6% 0%, rgba(34, 224, 214, 0.16) 0%, rgba(34, 224, 214, 0) 58%),
    radial-gradient(92% 84% at 98% 8%, rgba(255, 107, 44, 0.13) 0%, rgba(255, 107, 44, 0) 56%);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 100%);
  pointer-events: none;
}

.page-products .pp-hero > .wrap {
  position: relative;
}

.page-products h1 {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: clamp(28px, 5.1vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 900px;
}

.page-products .pp-lede {
  margin: 18px 0 0;
  max-width: 700px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.82;
  color: var(--paper-soft);
}

.page-products .pp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products .pp-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(26px, 3.4vw, 42px) 0 0;
  padding: 0;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-products .pp-facts > div {
  padding: 16px 18px;
  background: rgba(11, 18, 32, 0.72);
  min-width: 0;
}

.page-products .pp-facts dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-products .pp-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

/* ---------- 通用章节 ---------- */

.page-products .pp-sec {
  padding: var(--pp-sec-pad) 0;
  border-top: 1px solid var(--line-soft);
}

.page-products .pp-h2 {
  margin: 10px 0 0;
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 36px);
  line-height: 1.18;
  color: var(--paper);
  max-width: 880px;
}

.page-products .pp-intro {
  margin: 14px 0 0;
  max-width: 740px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-products .pp-shot {
  margin: clamp(22px, 3vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-950);
}

.page-products .pp-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 四分栏示意 ---------- */

.page-products .pp-quad {
  list-style: none;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-products .pp-quad__col {
  --pp-accent: var(--line);
  background: var(--ink-800);
  border-top: 3px solid var(--pp-accent);
  padding: clamp(18px, 2vw, 26px) clamp(15px, 1.6vw, 22px);
  min-width: 0;
  transition: background-color 240ms var(--ease);
}

.page-products .pp-quad__col:nth-child(1) { --pp-accent: var(--cyan); }
.page-products .pp-quad__col:nth-child(2) { --pp-accent: var(--grass); }
.page-products .pp-quad__col:nth-child(3) { --pp-accent: var(--orange); }
.page-products .pp-quad__col:nth-child(4) { --pp-accent: var(--mist); }

.page-products .pp-quad__col:hover,
.page-products .pp-quad__col:focus-within {
  background: var(--ink-900);
}

.page-products .pp-quad__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--pp-accent);
}

.page-products .pp-quad__title {
  margin: 10px 0 0;
  font-family: var(--font-narrow);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--paper);
}

.page-products .pp-quad__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper-soft);
}

@supports (animation-timeline: view()) {
  .page-products .pp-quad__col {
    animation: pp-lit linear both;
    animation-timeline: view();
    animation-range: entry 12% cover 40%;
  }

  @keyframes pp-lit {
    from { opacity: 0.5; }
    to { opacity: 1; }
  }
}

/* ---------- 三个具体问题 ---------- */

.page-products .pp-gain {
  margin-top: clamp(18px, 2.6vw, 30px);
  max-width: 880px;
}

.page-products .pp-gain__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .pp-gain__item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-products .pp-gain__no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
  opacity: 0.78;
}

.page-products .pp-gain__item h3 {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-gain__item p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-soft);
}

/* ---------- 安装步骤 ---------- */

.page-products .pp-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 24px);
}

.page-products .pp-steps__item {
  position: relative;
  padding: 26px 22px 26px;
  background: var(--ink-800);
  border-left: 3px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-products .pp-steps__item:nth-child(2) { border-left-color: var(--grass); }
.page-products .pp-steps__item:nth-child(3) { border-left-color: var(--orange); }

.page-products .pp-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-products .pp-steps__item:nth-child(2) .pp-steps__no { color: var(--grass); }
.page-products .pp-steps__item:nth-child(3) .pp-steps__no { color: var(--orange); }

.page-products .pp-steps__item h3 {
  margin: 14px 0 0;
  font-family: var(--font-narrow);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-steps__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--paper-soft);
}

/* ---------- 图文分栏 ---------- */

.page-products .pp-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-products .pp-split .pp-shot {
  margin: 0;
}

.page-products .pp-split__text {
  min-width: 0;
}

.page-products .pp-split__text h3 {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-split__text p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-soft);
}

/* ---------- 细目列表 ---------- */

.page-products .pp-ticks {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .pp-ticks li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-products .pp-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 悬浮比分条演示 ---------- */

.page-products .pp-sticky-demo {
  margin-top: clamp(24px, 3vw, 40px);
  border: 1px solid var(--line);
  background: var(--ink-850);
}

.page-products .pp-scorebar-demo {
  position: sticky;
  top: var(--bar-h);
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 18px;
  background: rgba(6, 11, 20, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-products .pp-scorebar-demo__live {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-950);
  background: var(--cyan);
  padding: 3px 8px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
}

.page-products .pp-scorebar-demo__score {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-products .pp-scorebar-demo__meta {
  margin-left: auto;
  color: var(--mist);
}

.page-products .pp-sticky-demo__body {
  padding: clamp(20px, 2.8vw, 34px);
}

.page-products .pp-sticky-demo__body h3 {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-sticky-demo__body p {
  margin: 12px 0 0;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-soft);
}

/* ---------- 单图带图注 ---------- */

.page-products .pp-figure {
  margin: clamp(24px, 3vw, 40px) 0 0;
}

.page-products .pp-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-products .pp-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 排名查询方式 ---------- */

.page-products .pp-modes {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .pp-modes li {
  padding: 12px 0 12px 16px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.74;
  color: var(--paper-soft);
}

.page-products .pp-modes li:nth-child(1) { border-left-color: var(--cyan); }
.page-products .pp-modes li:nth-child(2) { border-left-color: var(--grass); }
.page-products .pp-modes li:nth-child(3) { border-left-color: var(--orange); }

.page-products .pp-modes strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-narrow);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-products .pp-route {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin-top: 24px;
}

.page-products .pp-route__in,
.page-products .pp-route__out {
  fill: none;
}

.page-products .pp-route__in { stroke: var(--line); }
.page-products .pp-route__out { stroke: var(--cyan); }

/* ---------- 版本刻度 ---------- */

.page-products .pp-timeline {
  list-style: none;
  margin: clamp(22px, 3vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-products .pp-timeline__item {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--line);
}

.page-products .pp-timeline__item::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  border-radius: 50%;
}

.page-products .pp-timeline__version {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-products .pp-timeline__year {
  display: inline-block;
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-products .pp-timeline__item h3 {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-timeline__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--paper-soft);
}

/* ---------- 使用建议 ---------- */

.page-products .pp-tips {
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  max-width: 940px;
}

.page-products .pp-tips__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .pp-tips__row:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-products .pp-tips dt {
  font-family: var(--font-narrow);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-products .pp-tips dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-soft);
}

/* ---------- 尾部导航 ---------- */

.page-products .pp-sec--tail {
  background: rgba(6, 11, 20, 0.42);
}

.page-products .pp-next {
  list-style: none;
  margin: clamp(22px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-products .pp-next li {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-products .pp-next h3 {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pp-next p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--paper-soft);
}

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

.page-products .pp-next a:hover {
  color: var(--orange);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-products .pp-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .pp-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pp-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pp-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 32px;
  }
}

@media (min-width: 768px) {
  .page-products .pp-tips__row {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-products .pp-timeline__item {
    padding-right: 20px;
  }
}

@media (min-width: 900px) {
  .page-products .pp-quad {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pp-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 34px;
  }

  .page-products .pp-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-products .pp-split--wide-left {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 1080px) {
  .page-products .pp-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-quad__col {
    animation: none;
    transition: none;
  }
}