.page-products {
  position: relative;
}

.page-products .pp-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-products .pp-head .n28-lead {
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */
.page-products .pp-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 14vw, 132px) 0 clamp(40px, 7vw, 72px);
}

.page-products .pp-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  top: 42%;
  width: 124%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan-450) 45%, transparent 100%);
  transform: rotate(-8deg);
  opacity: 0.4;
  pointer-events: none;
}

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

.page-products .pp-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  margin-top: clamp(22px, 4vw, 40px);
}

.page-products .pp-hero__title {
  margin: 10px 0 0;
  max-width: 16ch;
}

.page-products .pp-hero__lede .n28-lead {
  margin-top: 18px;
  max-width: 58ch;
}

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

.page-products .pp-startline {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pp-startline__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .pp-startline__item:hover,
.page-products .pp-startline__item:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan-450);
}

.page-products .pp-startline__item .n28-badge {
  align-self: flex-start;
  margin-top: 2px;
}

.page-products .pp-startline__num {
  font-size: 26px;
  line-height: 1;
  color: var(--cyan-450);
  letter-spacing: 0.06em;
}

.page-products .pp-startline__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.page-products .pp-startline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-400);
}

@media (min-width: 760px) {
  .page-products .pp-startline {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-products .pp-startline__item:nth-child(2) {
    margin-top: 20px;
  }

  .page-products .pp-startline__item:nth-child(3) {
    margin-top: 40px;
  }
}

@media (min-width: 1000px) {
  .page-products .pp-hero__grid {
    grid-template-columns: 8fr 5fr;
    align-items: end;
  }
}

/* ---------- 图片 ---------- */
.page-products .pp-shot {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-products .pp-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
}

.page-products .pp-shot figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-400);
}

.page-products .pp-shot--wide img { aspect-ratio: 3 / 2; }
.page-products .pp-shot--tall img { aspect-ratio: 9 / 11; }
.page-products .pp-shot--city img { aspect-ratio: 2 / 1; }
.page-products .pp-shot--panel img { aspect-ratio: 10 / 7; }
.page-products .pp-shot--list img { aspect-ratio: 4 / 3; }

/* ---------- 专区构成 ---------- */
.page-products .pp-overview__body {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-products .pp-cats {
  display: grid;
  gap: 14px;
}

.page-products .pp-cat {
  padding: 16px 18px;
  background: var(--ink-850);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  transition: background-color var(--dur) var(--ease);
}

.page-products .pp-cat:hover {
  background: var(--ink-700);
}

.page-products .pp-cat__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.page-products .pp-cat h3 {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-products .pp-cat p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-400);
}

@media (min-width: 640px) {
  .page-products .pp-cats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .page-products .pp-overview__body {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
}

/* ---------- 三步接入 ---------- */
.page-products .pp-steps__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-products .pp-steps__media {
  max-width: 420px;
}

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

.page-products .pp-track__item {
  display: grid;
  gap: 12px;
  grid-template-columns: auto 1fr;
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-products .pp-track__item:hover {
  border-color: var(--cyan-450);
  transform: translateY(-2px);
}

.page-products .pp-track__item .n28-track__num {
  font-size: 22px;
  line-height: 1;
  color: var(--cyan-450);
}

.page-products .pp-track__body {
  display: grid;
  gap: 10px;
}

.page-products .pp-track__body .n28-h3 {
  margin: 0;
  font-size: 20px;
}

.page-products .pp-step__row {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-products .pp-step__label {
  display: inline-block;
  min-width: 72px;
  margin-right: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-450);
  vertical-align: 1px;
}

.page-products .pp-details {
  border-top: 1px solid var(--hair);
  padding-top: 10px;
}

.page-products .pp-details summary {
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  color: var(--mist-400);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.page-products .pp-details summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 15px;
}

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

.page-products .pp-details summary:focus-visible {
  outline: 2px solid var(--cyan-450);
  outline-offset: 2px;
}

.page-products .pp-details p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-400);
}

@media (min-width: 960px) {
  .page-products .pp-steps__grid {
    grid-template-columns: 4fr 8fr;
    align-items: start;
  }
}

/* ---------- 两端对照 ---------- */
.page-products .pp-compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-products .pp-compare tr {
  display: block;
  margin-bottom: 12px;
  padding: 14px 16px;
  background: var(--ink-850);
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
}

.page-products .pp-compare th,
.page-products .pp-compare td {
  display: block;
  padding: 6px 0;
  text-align: left;
  border: 0;
  line-height: 1.7;
}

.page-products .pp-compare thead {
  display: none;
}

.page-products .pp-compare tbody th {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-450);
  border-bottom: 1px solid var(--hair);
  padding-bottom: 10px;
  margin-bottom: 4px;
}

.page-products .pp-compare td {
  color: var(--paper-050);
}

.page-products .pp-compare td::before {
  content: attr(data-label);
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist-400);
}

@media (min-width: 720px) {
  .page-products .pp-compare {
    display: table;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--hair);
    border-radius: var(--radius-m);
    overflow: hidden;
  }

  .page-products .pp-compare thead {
    display: table-header-group;
    background: var(--ink-700);
  }

  .page-products .pp-compare tbody tr {
    display: table-row;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
  }

  .page-products .pp-compare tr > * {
    display: table-cell;
    padding: 16px 18px;
    border-bottom: 1px solid var(--hair);
    vertical-align: top;
  }

  .page-products .pp-compare thead th {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--mist-400);
    text-transform: uppercase;
  }

  .page-products .pp-compare tbody th {
    font-size: 15px;
    letter-spacing: 0;
    color: var(--paper-050);
    font-weight: 700;
    border-bottom: 1px solid var(--hair);
    margin: 0;
    min-width: 120px;
  }

  .page-products .pp-compare tbody tr:hover > * {
    background: rgba(55, 225, 240, 0.05);
  }

  .page-products .pp-compare td::before {
    content: none;
  }
}

/* ---------- 四类网络 ---------- */
.page-products .pp-network__figure {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-products .pp-quads {
  display: grid;
  gap: 14px;
}

.page-products .pp-quad {
  padding: 18px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(31, 191, 167, 0.08), transparent 62%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .pp-quad:hover,
.page-products .pp-quad:focus-within {
  transform: translateY(-2px);
  border-color: var(--teal-500);
}

.page-products .pp-quad__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-products .pp-quad__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.page-products .pp-quad__sig {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-400);
}

.page-products .pp-quad__act {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
}

.page-products .pp-quad__act span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--teal-500);
}

@media (min-width: 700px) {
  .page-products .pp-quads {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 更新与代次 ---------- */
.page-products .pp-update__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-products .pp-update__text p {
  margin: 0 0 16px;
}

.page-products .pp-update__text strong {
  color: var(--cyan-450);
  font-weight: 700;
}

.page-products .pp-update__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-products .pp-panel {
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: var(--ink-850);
  padding: 18px;
}

.page-products .pp-panel__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist-400);
}

.page-products .pp-panel__list {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-products .pp-panel__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--hair);
}

.page-products .pp-panel__row:last-child {
  border-bottom: 0;
}

.page-products .pp-panel__row dt {
  font-size: 14px;
  color: var(--mist-400);
}

.page-products .pp-panel__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--paper-050);
  white-space: nowrap;
}

@media (min-width: 900px) {
  .page-products .pp-update__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

/* ---------- 下一步 ---------- */
.page-products .pp-arrow {
  display: block;
  width: clamp(120px, 26vw, 180px);
  height: auto;
  margin-bottom: 18px;
  color: var(--orange-500);
}

.page-products .pp-next__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-products .pp-next__cards {
  display: grid;
  gap: 14px;
}

.page-products .pp-next__card {
  padding: 20px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: var(--ink-850);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .pp-next__card:hover {
  transform: translateY(-2px);
  border-color: var(--orange-500);
}

.page-products .pp-next__card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
}

.page-products .pp-next__card p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-400);
}

.page-products .pp-next__side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-products .pp-checklist {
  padding: 18px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: var(--ink-850);
}

.page-products .pp-checklist__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-500);
}

.page-products .pp-checklist ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-products .pp-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-050);
}

.page-products .pp-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--orange-500);
}

.page-products .pp-checklist__more {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-400);
}

.page-products a:not(.n28-btn) {
  color: var(--cyan-450);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products a:not(.n28-btn):hover {
  color: var(--paper-050);
}

.page-products a:focus-visible,
.page-products summary:focus-visible {
  outline: 2px solid var(--cyan-450);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-products .pp-next__cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .page-products .pp-next__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-startline__item,
  .page-products .pp-cat,
  .page-products .pp-track__item,
  .page-products .pp-quad,
  .page-products .pp-next__card {
    transition: none;
  }

  .page-products .pp-startline__item:hover,
  .page-products .pp-track__item:hover,
  .page-products .pp-quad:hover,
  .page-products .pp-next__card:hover {
    transform: none;
  }
}