.page-products {
  --pp-gap: clamp(18px, 3vw, 34px);
  --pp-sect: clamp(48px, 8vw, 104px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-sans);
  overflow-x: hidden;
}

.page-products h1,
.page-products h2,
.page-products h3,
.page-products h4 {
  margin: 0;
}

/* ===== 首屏 ===== */
.page-products .pp-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 56px) clamp(36px, 6vw, 80px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.72), rgba(245, 241, 234, 0) 62%);
  overflow: hidden;
}

.page-products .pp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0 42px,
    rgba(11, 37, 69, 0.045) 42px 43px
  );
  pointer-events: none;
}

.page-products .pp-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -32%;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, rgba(23, 233, 209, 0.2), rgba(23, 233, 209, 0) 64%);
  pointer-events: none;
}

.page-products .pp-hero .container {
  position: relative;
  z-index: 1;
}

.page-products .pp-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pp-gap);
  margin-top: clamp(22px, 3.5vw, 44px);
}

.page-products .pp-hero__title {
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  font-size: clamp(2.6rem, 7.6vw, 6.2rem);
  font-weight: 900;
  line-height: 0.94;
  letter-spacing: -0.045em;
  color: var(--navy);
}

.page-products .pp-hero__thin {
  display: block;
  margin-top: 6px;
  font-weight: 300;
  font-size: clamp(1.7rem, 5.6vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--navy-2);
}

.page-products .pp-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--grey);
}

.page-products .pp-hero__figure {
  margin: 0;
  padding: 10px 10px 0;
  background: var(--paper-white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  transform: rotate(1.4deg);
}

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

.page-products .pp-hero__figure figcaption {
  padding: 10px 2px 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--grey);
}

/* ===== 通用区块与标题 ===== */
.page-products .pp-sect {
  padding-block: var(--pp-sect);
  border-bottom: 1px solid var(--line);
}

.page-products .pp-head {
  max-width: 62ch;
}

.page-products .pp-head__title {
  margin: 10px 0 12px;
  font-size: clamp(1.7rem, 3.7vw, 2.8rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--navy);
}

.page-products .pp-head__lead {
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--grey);
}

.page-products .pp-lead {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 56ch;
  font-size: 17px;
  line-height: 1.82;
  color: var(--grey);
}

.page-products .pp-note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 14px 16px;
  background: var(--mint);
  border-left: 3px solid var(--cyan-deep);
  font-size: 14px;
  line-height: 1.72;
  color: var(--navy-2);
}

.page-products .pp-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ===== 技能树 ===== */
.page-products .pp-tree {
  margin-top: clamp(28px, 4vw, 52px);
}

.page-products .pp-tree__trunk {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: linear-gradient(135deg, rgba(23, 233, 209, 0.14), rgba(23, 233, 209, 0) 58%), var(--navy);
  color: var(--paper-white);
}

.page-products .pp-tree__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  border: 1px solid rgba(23, 233, 209, 0.55);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .pp-tree__trunk h3 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper-white);
}

.page-products .pp-tree__trunk p {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 241, 234, 0.76);
}

.page-products .pp-tree__branches {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.page-products .pp-branch {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--paper-white);
}

.page-products .pp-branch::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
}

.page-products .pp-branch__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  min-width: 30px;
  height: 30px;
  padding: 0 7px;
  border: 1px solid var(--cyan-deep);
  border-radius: 999px;
  background: var(--mint);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-deep);
}

.page-products .pp-branch h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.page-products .pp-branch ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pp-branch ol li {
  position: relative;
  padding: 9px 0 9px 22px;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-products .pp-branch ol li:last-child {
  border-bottom: 0;
}

.page-products .pp-branch ol li::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--cyan-deep);
}

.page-products .pp-branch__link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
}

.page-products .pp-branch__link:hover,
.page-products .pp-branch__link:focus-visible {
  border-bottom-color: var(--cyan-deep);
}

/* ===== 非对称双栏 ===== */
.page-products .pp-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pp-gap);
  align-items: start;
}

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

.page-products .pp-figure {
  margin: 0;
  padding: 10px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}

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

.page-products .pp-figure figcaption {
  padding: 10px 2px 2px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--grey);
}

.page-products .pp-figure--wide {
  margin-top: clamp(24px, 3.5vw, 42px);
}

/* ===== 步骤列表 ===== */
.page-products .pp-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .pp-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding: 15px 16px;
  background: var(--paper-white);
  align-items: start;
}

.page-products .pp-step__idx {
  padding-top: 2px;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan-deep);
}

.page-products .pp-step__title {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy);
}

.page-products .pp-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
}

/* ===== 折叠说明 ===== */
.page-products .pp-acc {
  margin-top: 12px;
  background: var(--paper-white);
  border: 1px solid var(--line);
}

.page-products .pp-acc summary {
  position: relative;
  padding: 14px 46px 14px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}

.page-products .pp-acc summary::-webkit-details-marker {
  display: none;
}

.page-products .pp-acc summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan-deep);
}

.page-products .pp-acc[open] summary::after {
  content: "−";
}

.page-products .pp-acc[open] summary {
  border-bottom: 1px solid var(--line);
}

.page-products .pp-acc p {
  margin: 0;
  padding: 14px 16px 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

/* ===== 索引数字卡 ===== */
.page-products .pp-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-products .pp-index__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--paper-white);
  border: 1px solid var(--line);
}

.page-products .pp-index__num {
  font-family: var(--f-mono);
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--navy);
}

.page-products .pp-index__card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-products .pp-index__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
}

/* ===== 帮助与指引 ===== */
.page-products .pp-help__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pp-gap);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-products .pp-checks {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pp-checks li {
  position: relative;
  padding-left: 30px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-products .pp-checks li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 0.55em;
  width: 15px;
  height: 15px;
  border: 1.5px solid var(--cyan-deep);
  border-radius: 50%;
}

.page-products .pp-checks li::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.83em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan-deep);
}

.page-products .pp-checks strong {
  display: block;
  margin-bottom: 2px;
  font-weight: 700;
  color: var(--navy);
}

.page-products .pp-help__aside {
  padding: clamp(20px, 2.8vw, 28px);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--coral);
}

.page-products .pp-help__aside h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.page-products .pp-help__aside p {
  margin: 10px 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

.page-products .pp-help__link {
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-products .pp-help__link:hover,
.page-products .pp-help__link:focus-visible {
  border-bottom-color: var(--cyan-deep);
}

/* ===== 版本事实表 ===== */
.page-products .pp-facts {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
}

.page-products .pp-facts > div {
  display: grid;
  grid-template-columns: minmax(84px, 0.34fr) 1fr;
  gap: 12px;
  padding: 12px 16px;
  background: var(--paper-white);
  border-bottom: 1px solid var(--line);
}

.page-products .pp-facts > div:last-child {
  border-bottom: 0;
}

.page-products .pp-facts dt {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--cyan-deep);
}

.page-products .pp-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
}

/* ===== 结尾行动区 ===== */
.page-products .pp-next {
  position: relative;
  padding-block: var(--pp-sect);
  background: var(--navy);
  color: var(--paper-white);
  overflow: hidden;
}

.page-products .pp-next::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  border: 1px solid rgba(23, 233, 209, 0.4);
  pointer-events: none;
}

.page-products .pp-next::after {
  content: "";
  position: absolute;
  top: 12%;
  right: 6%;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 1px solid rgba(23, 233, 209, 0.22);
  pointer-events: none;
}

.page-products .pp-next .container {
  position: relative;
  z-index: 1;
}

.page-products .pp-next__inner {
  max-width: 60ch;
}

.page-products .pp-next .eyebrow {
  color: var(--cyan);
}

.page-products .pp-next h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.8rem, 4.2vw, 3.1rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--paper-white);
}

.page-products .pp-next p {
  margin: 0;
  font-size: 17px;
  line-height: 1.82;
  color: rgba(245, 241, 234, 0.78);
}

.page-products .pp-next__link {
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-products .pp-next__link:hover,
.page-products .pp-next__link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-products .pp-index__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-products .pp-help__body {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

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

@media (min-width: 880px) {
  .page-products .pp-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-products .pp-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-products .pp-split--flip {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-products .pp-android .pp-figure {
    transform: rotate(-1.2deg);
  }

  .page-products .pp-ios .pp-figure {
    transform: rotate(1.2deg);
  }

  .page-products .pp-hero__figure {
    transform: rotate(1.6deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-hero__figure,
  .page-products .pp-android .pp-figure,
  .page-products .pp-ios .pp-figure {
    transform: none;
  }
}
<<<END>>>