.page-faq {
  --faq-rail-w: 224px;
  --faq-gap: clamp(22px, 3.2vw, 48px);
  --faq-rule: 1px solid rgba(46, 124, 155, 0.3);
  --faq-rule-soft: 1px solid rgba(46, 124, 155, 0.18);
  --faq-panel: rgba(15, 51, 46, 0.52);
  --faq-well: rgba(7, 23, 26, 0.55);
  background: var(--ink);
  color: var(--snow);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 58px) 0 clamp(28px, 4.6vw, 56px);
  border-bottom: 1px solid rgba(46, 124, 155, 0.28);
  background:
    radial-gradient(120% 92% at 10% 0%, rgba(46, 124, 155, 0.24), transparent 62%),
    linear-gradient(158deg, var(--deep) 0%, var(--ink) 72%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -70px;
  height: 130px;
  background: linear-gradient(90deg, rgba(255, 106, 26, 0) 0%, rgba(255, 106, 26, 0.55) 46%, rgba(255, 106, 26, 0) 100%);
  transform: rotate(-2.4deg);
  pointer-events: none;
  opacity: 0.6;
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__crumb {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero__lead {
  min-width: 0;
}

.page-faq .faq-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 5.3vw, 56px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--snow);
  max-width: 17em;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--frost);
  max-width: 34em;
}

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

.page-faq .faq-hero__figure {
  margin: 0;
  transform: rotate(-1.1deg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 场景快捷跳转 ---------- */

.page-faq .faq-jump {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(46, 124, 155, 0.24);
  border-bottom: 1px solid rgba(46, 124, 155, 0.24);
  background: rgba(15, 51, 46, 0.6);
}

.page-faq .faq-jump__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 12px;
  padding-bottom: 12px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-faq .faq-jump__label {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--data);
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.page-faq .faq-jump__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--snow);
  text-decoration: none;
  border: 1px solid rgba(46, 124, 155, 0.42);
  background: rgba(7, 23, 26, 0.62);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-jump__list a .num {
  color: var(--path);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  color: var(--path);
  border-color: rgba(255, 106, 26, 0.72);
  background: rgba(23, 74, 99, 0.5);
}

/* ---------- 两栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(30px, 5vw, 72px);
  padding-bottom: clamp(48px, 7vw, 104px);
  align-items: start;
}

.page-faq .faq-rail {
  position: relative;
  padding: 20px 18px 18px;
  border: var(--faq-rule-soft);
  background: var(--faq-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--frost);
}

.page-faq .faq-rail__list {
  position: relative;
  margin: 16px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-faq .faq-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(46, 124, 155, 0.6), rgba(46, 124, 155, 0.06));
}

.page-faq .faq-rail__item {
  position: relative;
  padding: 7px 0;
}

.page-faq .faq-rail__dot {
  position: absolute;
  left: -22px;
  top: 12px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--water);
  border: 1px solid rgba(143, 208, 223, 0.65);
  transition: background 220ms var(--ease), box-shadow 220ms var(--ease), transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-faq .faq-rail__link {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--data);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--path);
}

.page-faq .faq-rail__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(46, 124, 155, 0.28);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--data);
}

.page-faq:has([data-scene="entry"][open]) [data-dot="entry"],
.page-faq:has([data-scene="map"][open]) [data-dot="map"],
.page-faq:has([data-scene="data"][open]) [data-dot="data"],
.page-faq:has([data-scene="device"][open]) [data-dot="device"],
.page-faq:has([data-scene="report"][open]) [data-dot="report"] {
  background: var(--path);
  border-color: var(--path);
  box-shadow: 0 0 0 5px rgba(255, 106, 26, 0.16);
  transform: scale(1.18);
}

.page-faq:has([data-scene="entry"][open]) [data-rail="entry"],
.page-faq:has([data-scene="map"][open]) [data-rail="map"],
.page-faq:has([data-scene="data"][open]) [data-rail="data"],
.page-faq:has([data-scene="device"][open]) [data-rail="device"],
.page-faq:has([data-scene="report"][open]) [data-rail="report"] {
  color: var(--snow);
}

/* ---------- 右栏主体 ---------- */

.page-faq .faq-main {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  min-width: 0;
}

.page-faq .faq-scene {
  position: relative;
  padding: clamp(20px, 2.8vw, 34px);
  border: var(--faq-rule-soft);
  background: linear-gradient(155deg, rgba(23, 74, 99, 0.26), rgba(7, 23, 26, 0.22));
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-faq .faq-scene--report {
  background: linear-gradient(150deg, rgba(255, 106, 26, 0.1), rgba(15, 51, 46, 0.55) 62%, rgba(7, 23, 26, 0.3));
}

.page-faq .faq-scene__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  row-gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(46, 124, 155, 0.26);
}

.page-faq .faq-scene__index {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--path);
  background: rgba(255, 106, 26, 0.12);
  border: 1px solid rgba(255, 106, 26, 0.34);
  padding: 3px 8px;
  line-height: 1.5;
}

.page-faq .faq-scene__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 29px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-faq .faq-scene__lede {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--data);
  max-width: 40em;
}

/* ---------- 步骤列表 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: none;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: var(--faq-well);
  border-left: 2px solid rgba(255, 106, 26, 0.55);
}

.page-faq .faq-steps__no {
  display: block;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--path);
}

.page-faq .faq-steps__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--frost);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--snow);
}

/* ---------- 分组卡片 ---------- */

.page-faq .faq-groups {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-groups__item {
  padding: 16px 18px;
  background: var(--faq-well);
  border-top: 2px solid rgba(46, 124, 155, 0.55);
}

.page-faq .faq-groups__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--path);
}

.page-faq .faq-groups__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--snow);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-qa-group {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-qa {
  border: 1px solid rgba(46, 124, 155, 0.3);
  background: rgba(15, 51, 46, 0.46);
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-faq .faq-qa[open] {
  border-color: rgba(255, 106, 26, 0.5);
  background: rgba(23, 74, 99, 0.42);
}

.page-faq .faq-qa__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--snow);
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-qa__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-qa__q::marker {
  content: "";
}

.page-faq .faq-qa__marker {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: var(--water);
  transform: rotate(45deg);
  transition: background 220ms var(--ease), transform 220ms var(--ease);
}

.page-faq .faq-qa[open] .faq-qa__marker {
  background: var(--path);
  transform: rotate(225deg);
}

.page-faq .faq-qa__a {
  padding: 0 16px 16px 37px;
}

.page-faq .faq-qa__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--frost);
}

/* ---------- 小屏配图 ---------- */

.page-faq .faq-device__figure {
  margin: 22px 0 0;
  transform: rotate(0.7deg);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-device__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 10 / 8;
}

/* ---------- 反馈准备 ---------- */

.page-faq .faq-prep {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-prep__item {
  padding: 16px 18px;
  background: rgba(7, 23, 26, 0.62);
  border: 1px solid rgba(46, 124, 155, 0.26);
  border-left: 3px solid var(--path);
}

.page-faq .faq-prep__item h3 {
  margin: 0 0 7px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--snow);
}

.page-faq .faq-prep__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--data);
}

.page-faq .faq-contact {
  margin-top: 24px;
  padding: 20px 20px 22px;
  background: rgba(7, 23, 26, 0.68);
  border: 1px solid rgba(255, 106, 26, 0.34);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-contact__lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--snow);
  max-width: 40em;
}

.page-faq .faq-contact__meta {
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(46, 124, 155, 0.26);
}

.page-faq .faq-contact__row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact__meta dt {
  font-size: 13px;
  color: var(--data);
  letter-spacing: 0.06em;
}

.page-faq .faq-contact__meta dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--frost);
  word-break: break-word;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-groups,
  .page-faq .faq-prep {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 64px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-main {
    padding-left: clamp(0px, 1.6vw, 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__dot,
  .page-faq .faq-qa,
  .page-faq .faq-qa__marker,
  .page-faq .faq-jump__list a,
  .page-faq .faq-rail__link {
    transition: opacity 200ms linear;
  }

  .page-faq .faq-hero__figure,
  .page-faq .faq-device__figure {
    transform: none;
  }

  .page-faq:has([data-scene="entry"][open]) [data-dot="entry"],
  .page-faq:has([data-scene="map"][open]) [data-dot="map"],
  .page-faq:has([data-scene="data"][open]) [data-dot="data"],
  .page-faq:has([data-scene="device"][open]) [data-dot="device"],
  .page-faq:has([data-scene="report"][open]) [data-dot="report"] {
    transform: none;
  }
}