.page-faq {
  --faq-gap: clamp(20px, 3vw, 34px);
  --faq-cut: 18px;
  position: relative;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vh, 48px) 0 clamp(56px, 9vh, 92px);
  background:
    radial-gradient(120% 100% at 92% -10%, rgba(21, 87, 255, .28), transparent 62%),
    linear-gradient(102deg, transparent 58%, rgba(43, 245, 216, .08) 58.2%, transparent 59.6%),
    linear-gradient(102deg, transparent 74%, rgba(255, 106, 31, .07) 74.2%, transparent 75.4%),
    var(--bg);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(26px, 4vh, 46px);
  align-items: start;
}

.page-faq .faq-hero__copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 10px 0 18px;
}

.page-faq .faq-hero__copy .lede {
  color: var(--text-dim);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  max-width: 46ch;
  margin: 0 0 26px;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
  list-style: none;
  padding: 22px 0 0;
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .datum {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding-left: 34px;
}

.page-faq .datum::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 24px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .datum__value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -.01em;
}

.page-faq .datum__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .datum__label {
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .faq-hero__fig {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  clip-path: polygon(0 12%, 100% 0, 100% 88%, 0 100%);
  box-shadow: 0 0 0 1px rgba(43, 245, 216, .5);
  background: var(--rock);
}

.page-faq .faq-hero__fig figcaption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ---------- 热门问题条带 ---------- */
.page-faq .faq-hot {
  padding: clamp(40px, 7vh, 76px) 0 0;
}

.page-faq .faq-sec__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.18;
  letter-spacing: -.015em;
  margin: 8px 0 0;
}

.page-faq .faq-hot__strip {
  display: flex;
  gap: 16px;
  margin-top: 30px;
  padding-bottom: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .hotcard {
  flex: 0 0 84%;
  min-width: 0;
  scroll-snap-align: start;
  background: var(--rock);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  padding: 4px 18px 4px 16px;
  transition: box-shadow .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .hotcard:has([aria-expanded="true"]) {
  box-shadow: inset 0 0 0 1px var(--line), inset 4px 0 0 var(--orange);
  background: #1A2029;
}

.page-faq .hotcard:nth-child(3n) {
  flex-basis: 90%;
}

.page-faq .hotcard__h {
  margin: 0;
}

.page-faq .hotcard__q {
  font-size: 16px;
  line-height: 1.5;
}

.page-faq .faq-hot__hint {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 可展开条目通用 ---------- */
.page-faq .acc__btn {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .16s var(--ease);
}

.page-faq .acc__btn:hover,
.page-faq .acc__btn:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-faq .acc__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--mist);
  transition: border-color .16s var(--ease), color .16s var(--ease), transform .16s var(--ease);
}

.page-faq .acc__mark::before {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1px;
  background: currentColor;
  transform: translateY(-50%);
}

.page-faq .acc__mark::after {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1px;
  background: currentColor;
  transform: translateX(-50%);
  transition: opacity .16s var(--ease);
}

.page-faq .acc__item:has([aria-expanded="true"]) .acc__mark {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: rotate(90deg);
}

.page-faq .acc__item:has([aria-expanded="true"]) .acc__mark::after {
  opacity: 0;
}

.page-faq .acc__panel {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0;
  transition: max-height .36s var(--ease), opacity .24s var(--ease);
}

.page-faq .acc__item:has([aria-expanded="true"]) .acc__panel {
  max-height: 60rem;
  opacity: 1;
}

.page-faq .acc__panel p {
  margin: 0 0 10px;
  padding-bottom: 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-dim);
  max-width: 64ch;
}

.page-faq .acc__panel ol {
  padding-bottom: 12px;
}

.page-faq .acc__panel a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 216, .4);
  transition: border-color .16s var(--ease);
}

.page-faq .acc__panel a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 主体：窄栏索引 + 宽栏问答 ---------- */
.page-faq .faq-body {
  padding: clamp(56px, 10vh, 110px) 0 0;
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-nav__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-nav__list li {
  width: 100%;
}

.page-faq .faq-nav__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0 11px 14px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  outline: none;
}

.page-faq .faq-nav__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-nav__link:hover .faq-nav__idx {
  color: var(--cyan);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(52px, 8vh, 88px);
}

.page-faq .chapter__num {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1;
  margin: 0 0 6px;
  color: rgba(43, 245, 216, .35);
}

.page-faq .chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -.015em;
  margin: 0 0 10px;
}

.page-faq .chapter__lead {
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.75;
  max-width: 54ch;
  margin: 0 0 22px;
}

.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-list .acc__item {
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  padding-left: 16px;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-list .acc__item:has([aria-expanded="true"]) {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 106, 31, .07), transparent 62%);
}

.page-faq .faq-list .acc__item h3 {
  margin: 0;
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 4px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  padding-top: 4px;
}

/* ---------- 费用小卡 ---------- */
.page-faq .faq-price {
  display: grid;
  gap: 14px;
  margin: 0 0 34px;
}

.page-faq .faq-price__cell {
  padding: 20px 18px;
  background: var(--rock);
}

.page-faq .faq-price__cell .datum {
  padding-left: 32px;
  margin: 6px 0 8px;
}

.page-faq .faq-price__cell .datum::before {
  width: 22px;
}

.page-faq .faq-price__cell .datum__value {
  font-size: 24px;
}

.page-faq .faq-price__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-price__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 帮助文档 ---------- */
.page-faq .faq-docs {
  padding: clamp(64px, 10vh, 116px) 0 clamp(48px, 7vh, 76px);
}

.page-faq .faq-docs__split {
  display: grid;
  gap: clamp(30px, 4vw, 50px);
  align-items: start;
}

.page-faq .faq-docs__left h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.18;
  letter-spacing: -.015em;
  margin: 8px 0 12px;
}

.page-faq .faq-docs__left .lede {
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
  max-width: 52ch;
  margin: 0 0 26px;
}

.page-faq .faq-docs__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-faq .faq-doc {
  padding: 16px 14px;
  background: var(--rock);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-doc:hover {
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-faq .faq-doc__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-doc__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

.page-faq .faq-doc__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .faq-docs__fig {
  margin: 0;
}

.page-faq .faq-docs__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
  box-shadow: 0 0 0 1px rgba(43, 245, 216, .45);
  background: var(--rock);
}

.page-faq .faq-docs__fig figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 反馈收束 ---------- */
.page-faq .faq-help {
  margin-top: clamp(40px, 6vh, 68px);
  padding: clamp(24px, 3.4vw, 40px);
  background: var(--rock);
  display: grid;
  gap: 22px;
}

.page-faq .faq-help__text h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.25;
  margin: 0 0 10px;
}

.page-faq .faq-help__text p {
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
  max-width: 56ch;
}

.page-faq .faq-help__contact {
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__k {
  flex: 0 0 68px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-dim);
}

.page-faq .faq-help__v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-help .btnrow {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .hotcard {
    flex-basis: 46%;
  }

  .page-faq .hotcard:nth-child(3n) {
    flex-basis: 54%;
  }

  .page-faq .faq-docs__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-price {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
  }

  .page-faq .faq-docs__split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

  .page-faq .faq-docs__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-help .btnrow {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
  }

  .page-faq .faq-price {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .hotcard {
    flex-basis: 300px;
  }

  .page-faq .hotcard:nth-child(3n) {
    flex-basis: 360px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-docs__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .acc__panel,
  .page-faq .acc__mark,
  .page-faq .faq-doc {
    transition: opacity .01ms linear;
  }

  .page-faq .faq-doc:hover {
    transform: none;
  }
}