.page-faq {
  --faq-node: 44px;
  --faq-node-gap: 20px;
  --faq-line: 1.5px;
  display: block;
}

/* 面包屑 */
.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: clamp(20px, 3vw, 32px) 0 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dim);
}
.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--cyan);
  opacity: 0.55;
}
.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}
.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan-hi);
}
.page-faq .crumbs [aria-current="page"] {
  color: var(--cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(34px, 5.5vw, 68px);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(to right, var(--cyan) 0%, rgba(31, 224, 200, 0.22) 42%, transparent 100%);
}
.page-faq .faq-hero h1 {
  margin: clamp(12px, 1.8vw, 18px) 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-geo);
  font-size: clamp(32px, 6.6vw, 74px);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 17ch;
}
.page-faq .faq-hero .lead {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3.6vw, 38px);
  border: 1px solid var(--layer);
  background: var(--layer);
}
.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2.2vw, 20px);
  background: var(--panel);
}
.page-faq .faq-hero__num {
  font-family: var(--font-geo);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 400;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: var(--num);
}
.page-faq .faq-hero__cap {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-hero__rail {
  position: relative;
  padding: clamp(18px, 2.6vw, 24px) 0 clamp(18px, 2.6vw, 24px) clamp(18px, 2.6vw, 26px);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(31, 224, 200, 0.07), transparent 76%);
}
.page-faq .faq-rail {
  margin: clamp(12px, 2vw, 18px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}
.page-faq .faq-rail a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid rgba(23, 40, 76, 0.85);
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}
.page-faq .faq-rail a:hover,
.page-faq .faq-rail a:focus-visible {
  color: var(--cyan-hi);
  padding-left: 6px;
}
.page-faq .faq-rail__n {
  font-family: var(--font-geo);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan);
  font-variant-numeric: var(--num);
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) minmax(272px, 0.52fr);
    align-items: start;
  }
}
@media (min-width: 560px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 章节骨架 */
.page-faq .faq-sec {
  padding: clamp(48px, 6.6vw, 92px) 0 0;
}
.page-faq .faq-sec__head {
  display: grid;
  gap: clamp(8px, 1.6vw, 14px);
  align-items: start;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}
.page-faq .faq-sec__head .section__num {
  font-family: var(--font-geo);
  font-size: clamp(38px, 6vw, 70px);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--cyan);
  font-variant-numeric: var(--num);
}
.page-faq .faq-sec__head .section__title {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 600;
  line-height: 1.28;
  color: var(--text);
}
.page-faq .faq-sec .prose {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-faq .faq-sec__head {
    grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
    gap: clamp(18px, 2.6vw, 32px);
  }
}

/* 准备清单 */
.page-faq .faq-prep {
  display: grid;
  gap: clamp(14px, 2vw, 18px);
  margin: 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 760px) {
  .page-faq .faq-prep {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-faq .faq-prep__item {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--panel);
  border: 1px solid var(--layer);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.page-faq .faq-prep__idx {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-geo);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--orange);
}
.page-faq .faq-prep__item h3 {
  margin: 0 0 10px;
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}
.page-faq .faq-prep__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 十一步路径 */
.page-faq .faq-steps__wrap {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
  counter-reset: faqstep;
}
.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: var(--faq-node) minmax(0, 1fr);
  gap: var(--faq-node-gap);
  padding-bottom: clamp(20px, 2.8vw, 28px);
}
.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: calc(var(--faq-node) / 2 - var(--faq-line) / 2);
  top: var(--faq-node);
  bottom: 0;
  width: var(--faq-line);
  background: linear-gradient(to bottom, rgba(31, 224, 200, 0.55), rgba(31, 224, 200, 0.14));
}
.page-faq .faq-step:last-child::before {
  display: none;
}
.page-faq .faq-step__node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--faq-node);
  height: var(--faq-node);
  border: var(--faq-line) solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
  color: var(--cyan);
  font-family: var(--font-geo);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-variant-numeric: var(--num);
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease), color 0.24s var(--ease);
}
.page-faq .faq-step:hover .faq-step__node,
.page-faq .faq-step:focus-within .faq-step__node {
  background: var(--cyan);
  border-color: var(--cyan-hi);
  color: var(--ink);
}
.page-faq .faq-step__body {
  padding-top: 6px;
  min-width: 0;
}
.page-faq .faq-step__action {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}
.page-faq .faq-step__result {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-shot {
  margin: 0;
}
.page-faq .faq-shot .media-frame {
  border: 1px solid var(--layer);
  background: var(--panel);
}
.page-faq .faq-steps__tail {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: clamp(14px, 2.2vw, 20px) clamp(16px, 2.4vw, 22px);
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.08), transparent 80%);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 980px) {
  .page-faq .faq-steps__wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(34px, 4vw, 56px);
  }
  .page-faq .faq-shot {
    position: sticky;
    top: clamp(28px, 5vw, 56px);
  }
}

/* 终端差异 */
.page-faq .faq-devices {
  display: grid;
  gap: 1px;
  border: 1px solid var(--layer);
  background: var(--layer);
}
.page-faq .faq-dev {
  background: var(--panel);
}
.page-faq .faq-dev[open] {
  background: var(--layer);
}
.page-faq .faq-dev__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.4vw, 26px);
  cursor: pointer;
  list-style: none;
  color: var(--text);
}
.page-faq .faq-dev__sum::-webkit-details-marker {
  display: none;
}
.page-faq .faq-dev__sum::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1.5px solid var(--cyan);
  flex: none;
  transition: background-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}
.page-faq .faq-dev[open] .faq-dev__sum::before {
  background: var(--cyan-hi);
  box-shadow: 0 0 0 4px rgba(124, 243, 228, 0.18);
}
.page-faq .faq-dev__name {
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 600;
}
.page-faq .faq-dev__time {
  margin-left: auto;
  font-family: var(--font-geo);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--cyan);
  font-variant-numeric: var(--num);
}
.page-faq .faq-dev__body {
  padding: 0 clamp(16px, 2.4vw, 26px) clamp(18px, 2.4vw, 24px) clamp(42px, 5vw, 52px);
}
.page-faq .faq-dev__body p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}
.page-faq .faq-dev__hint {
  padding-left: 12px;
  border-left: 2px solid rgba(255, 192, 138, 0.6);
  color: var(--orange-soft) !important;
  font-size: 14px !important;
}
.page-faq .faq-dev__body p:last-child {
  margin-bottom: 0;
}

/* 排查信息图与四类卡片 */
.page-faq .faq-diagram {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
}
.page-faq .faq-diagram .media-frame {
  border: 1px solid var(--layer);
  background: var(--panel);
}

.page-faq .faq-diag {
  display: grid;
  gap: clamp(14px, 2vw, 18px);
  margin-top: clamp(22px, 3vw, 32px);
}
@media (min-width: 720px) {
  .page-faq .faq-diag {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-faq .faq-diag__card {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--panel);
  border: 1px solid var(--layer);
  border-top: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.page-faq .faq-diag__card--a {
  border-top-color: var(--orange);
}
.page-faq .faq-diag__card--b {
  border-top-color: var(--blue);
}
.page-faq .faq-diag__card--c {
  border-top-color: var(--cyan);
}
.page-faq .faq-diag__card--d {
  border-top-color: var(--orange-soft);
}
.page-faq .faq-diag__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-bottom: clamp(12px, 2vw, 18px);
}
.page-faq .faq-diag__mk {
  font-family: var(--font-geo);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
  font-variant-numeric: var(--num);
}
.page-faq .faq-diag__head h3 {
  margin: 0;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 600;
  color: var(--text);
}
.page-faq .faq-diag__head .tag {
  margin-left: auto;
}
.page-faq .faq-diag__list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: diag;
  display: grid;
  gap: 2px;
}
.page-faq .faq-diag__list li {
  position: relative;
  padding: 9px 0 9px 26px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
  border-bottom: 1px solid rgba(23, 40, 76, 0.7);
}
.page-faq .faq-diag__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-faq .faq-diag__list li::before {
  counter-increment: diag;
  content: counter(diag, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 9px;
  font-family: var(--font-geo);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-variant-numeric: var(--num);
}

/* 版本记录 */
.page-faq .faq-vers {
  display: grid;
  gap: 1px;
  border: 1px solid var(--layer);
  background: var(--layer);
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-faq .faq-ver {
  background: var(--panel);
}
.page-faq .faq-ver[open] {
  background: linear-gradient(90deg, rgba(51, 214, 255, 0.07), transparent 70%), var(--panel);
}
.page-faq .faq-ver__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-ver__sum::-webkit-details-marker {
  display: none;
}
.page-faq .faq-ver__no {
  font-family: var(--font-geo);
  font-size: clamp(15px, 1.7vw, 19px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--blue);
  font-variant-numeric: var(--num);
}
.page-faq .faq-ver__chev {
  margin-left: auto;
  width: 10px;
  height: 10px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease);
}
.page-faq .faq-ver[open] .faq-ver__chev {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}
.page-faq .faq-ver__body {
  padding: 0 clamp(16px, 2.4vw, 26px) clamp(18px, 2.4vw, 24px);
}
.page-faq .faq-ver__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}
.page-faq .faq-sec .note-rail {
  margin: 0;
  padding: 14px 0 14px 16px;
  border-left: 1px solid rgba(31, 224, 200, 0.35);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--dim);
  max-width: 60ch;
}
.page-faq .faq-sec .note-rail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 224, 200, 0.4);
}
.page-faq .faq-sec .note-rail a:hover,
.page-faq .faq-sec .note-rail a:focus-visible {
  color: var(--cyan-hi);
}

/* 教程维护与反馈 */
.page-faq .faq-upd {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}
.page-faq .faq-upd__main p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}
.page-faq .faq-upd__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}
.page-faq .faq-upd__side {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--panel);
  border: 1px solid var(--layer);
  border-left: 2px solid var(--cyan);
}
.page-faq .faq-upd__list {
  margin: clamp(12px, 2vw, 18px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}
.page-faq .faq-upd__list li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(23, 40, 76, 0.8);
}
.page-faq .faq-upd__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-faq .faq-upd__list a {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: color 0.22s var(--ease);
}
.page-faq .faq-upd__list a:hover,
.page-faq .faq-upd__list a:focus-visible {
  color: var(--cyan-hi);
}
.page-faq .faq-upd__list span {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dim);
}

@media (min-width: 900px) {
  .page-faq .faq-upd {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step__node,
  .page-faq .faq-rail a,
  .page-faq .faq-ver__chev,
  .page-faq .faq-upd__list a {
    transition: none;
  }
}