/* ===== APP下载页 ===== */
.page-products .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

/* --- 首屏 --- */
.page-products .prod-hero {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 7vw, 96px);
}

.page-products .prod-hero__frame {
  border-color: var(--line-inv);
  background: linear-gradient(158deg, rgba(28, 53, 73, .86) 0%, rgba(11, 22, 34, .98) 64%);
  padding: clamp(20px, 3.6vw, 56px);
}

.page-products .prod-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-products .prod-hero .eyebrow {
  color: var(--copper-2);
}

.page-products .prod-hero h1 {
  margin: 12px 0 clamp(14px, 2vw, 22px);
  font-size: clamp(30px, 6.2vw, 62px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-products .prod-hero__lede {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(244, 239, 230, .76);
}

.page-products .prod-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-products .prod-hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 26px);
  margin-top: clamp(24px, 3.4vw, 40px);
  padding-top: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--line-inv);
}

.page-products .prod-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-products .prod-hero__meta-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate-2);
}

.page-products .prod-hero__meta-val {
  font-size: clamp(14px, 1.7vw, 18px);
  font-weight: 600;
  color: var(--copper-2);
}

.page-products .prod-hero__shot {
  margin: 0;
}

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

@media (min-width: 900px) {
  .page-products .prod-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .82fr);
  }
}

/* --- 运行环境 --- */
.page-products .prod-specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(24px, 3.4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .prod-spec {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  min-height: 112px;
  padding: clamp(16px, 2.4vw, 28px);
  background: var(--paper);
}

.page-products .prod-spec__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-products .prod-spec__v {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}

.page-products .prod-spec--signal {
  background: var(--signal);
}

.page-products .prod-spec--signal .prod-spec__k,
.page-products .prod-spec--signal .prod-spec__v {
  color: var(--paper);
}

.page-products .prod-notes {
  border-top: 1px solid var(--line-2);
}

.page-products .prod-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(14px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--line);
}

.page-products .prod-note__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--copper);
}

.page-products .prod-note__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-products .prod-specs__shot {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

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

@media (min-width: 760px) {
  .page-products .prod-specs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .prod-note {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 44px);
    align-items: baseline;
  }
}

/* --- 安装步骤 --- */
.page-products .prod-install {
  background: var(--paper-2);
}

.page-products .prod-install__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-products .prod-steps {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .prod-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 30px);
  padding: clamp(18px, 2.8vw, 30px) 0;
  border-top: 1px solid var(--line);
}

.page-products .prod-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-products .prod-step__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 300;
  line-height: 1;
  color: var(--copper);
}

.page-products .prod-step:first-child .prod-step__no {
  color: var(--signal);
}

.page-products .prod-step__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-products .prod-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-products .prod-install__shot {
  margin: 0;
}

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

@media (min-width: 1000px) {
  .page-products .prod-install__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, .68fr);
  }
}

/* --- 客户端能力 --- */
.page-products .prod-cap {
  background: var(--ink);
  color: var(--paper);
}

.page-products .prod-cap .section__title {
  color: var(--paper);
}

.page-products .prod-cap .section__lede {
  color: rgba(244, 239, 230, .7);
}

.page-products .prod-cap .section__index {
  color: var(--copper-2);
}

.page-products .prod-caps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-inv);
  border: 1px solid var(--line-inv);
}

.page-products .prod-cap-card {
  padding: clamp(20px, 3vw, 36px);
  background: var(--ink-2);
  border-top: 2px solid var(--copper);
}

.page-products .prod-cap-card__tag {
  margin: 0 0 clamp(12px, 2vw, 20px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--copper-2);
}

.page-products .prod-cap-card__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-products .prod-cap-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 230, .72);
}

@media (min-width: 880px) {
  .page-products .prod-caps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* --- 获取方式 --- */
.page-products .prod-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-products .prod-channel {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-products .prod-channel__title {
  margin: clamp(14px, 2vw, 20px) 0 10px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-products .prod-channel__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-products .prod-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  margin-top: clamp(28px, 4vw, 52px);
  padding: clamp(20px, 3vw, 36px);
  border-left: 3px solid var(--signal);
  background: var(--paper-2);
}

.page-products .prod-band__shot {
  margin: 0;
}

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

.page-products .prod-band__title {
  margin: 10px 0 12px;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 300;
  line-height: 1.3;
  color: var(--ink);
}

.page-products .prod-band__text {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

@media (min-width: 820px) {
  .page-products .prod-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .prod-band {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  }
}

/* --- 常见问题 --- */
.page-products .prod-help {
  background: var(--paper-2);
}

.page-products .prod-faq {
  margin-top: clamp(20px, 3vw, 34px);
  border-top: 1px solid var(--line-2);
}

.page-products .prod-faq__item {
  border-bottom: 1px solid var(--line);
}

.page-products .prod-faq__q {
  padding: clamp(16px, 2.2vw, 22px) clamp(30px, 4vw, 44px) clamp(16px, 2.2vw, 22px) 0;
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  position: relative;
}

.page-products .prod-faq__q::-webkit-details-marker {
  display: none;
}

.page-products .prod-faq__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: clamp(16px, 2.2vw, 22px);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--copper);
}

.page-products .prod-faq__item[open] .prod-faq__q::after {
  content: "–";
  color: var(--signal);
}

.page-products .prod-faq__item[open] .prod-faq__q {
  color: var(--signal-2);
}

.page-products .prod-faq__a {
  margin: 0;
  padding: 0 clamp(30px, 4vw, 44px) clamp(18px, 2.4vw, 24px) 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* --- 下一步 --- */
.page-products .prod-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
  padding: clamp(22px, 3.4vw, 44px);
  border: 1px solid var(--line-2);
  background: linear-gradient(120deg, var(--paper-3) 0%, var(--paper) 72%);
}

.page-products .prod-cta__title {
  margin: 10px 0 12px;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 300;
  line-height: 1.25;
  color: var(--ink);
}

.page-products .prod-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-products .prod-cta__mail {
  color: var(--signal-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 840px) {
  .page-products .prod-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

/* --- 窄屏兜底 --- */
@media (max-width: 400px) {
  .page-products .prod-hero__meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-products .prod-spec {
    min-height: 0;
  }
}
</main>