.page-faq {
  --faq-accent: var(--cyan);
  --faq-soft: rgba(127, 231, 255, 0.09);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 34px) 0 clamp(34px, 5vw, 64px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -14%;
  width: min(720px, 96vw);
  height: 150%;
  background: linear-gradient(142deg, rgba(127, 231, 255, 0.13), rgba(127, 231, 255, 0) 62%);
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 58%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -40%;
  width: min(520px, 80vw);
  height: 90%;
  background: linear-gradient(20deg, rgba(255, 138, 61, 0.1), rgba(255, 138, 61, 0) 68%);
  clip-path: polygon(0 40%, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(29px, 5.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.032em;
  margin: 14px 0 16px;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  max-width: 52ch;
}

.page-faq .faq-hero .btn-row {
  margin-top: 22px;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 10px;
}

.page-faq .faq-hero__stats li {
  border: var(--hair);
  border-radius: var(--r-m);
  background: linear-gradient(162deg, rgba(21, 34, 56, 0.92), rgba(14, 22, 38, 0.55));
  box-shadow: var(--shadow-1);
  padding: 13px 15px;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-faq .faq-hero__stats li:hover {
  border-color: rgba(127, 231, 255, 0.38);
  transform: translateY(-2px);
}

.page-faq .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 25px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .stat-num small {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  margin-left: 3px;
}

.page-faq .faq-hero__stats em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
}

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

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

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

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

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  border: var(--hair);
  border-radius: var(--r-m);
  background: linear-gradient(180deg, rgba(21, 34, 56, 0.72), rgba(14, 22, 38, 0.9));
  box-shadow: var(--shadow-1);
  padding: 16px;
}

.page-faq .faq-index__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 16px;
  padding-top: 16px;
  border-top: var(--hair);
}

.page-faq .faq-index__head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--r-s);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}

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

.page-faq .faq-index__head:hover,
.page-faq .faq-index__head:focus-visible {
  background: var(--faq-soft);
  color: var(--cyan);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0 0 0 6px;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 6px 9px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-s) var(--r-s) 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text);
  background: var(--faq-soft);
  border-left-color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 6vw, 68px);
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: 18px;
  margin-bottom: 16px;
}

.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(127, 231, 255, 0.06));
}

.page-faq .faq-group__head .eyebrow .mono {
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.026em;
  margin: 8px 0 8px;
  max-width: 22ch;
}

.page-faq .faq-group__head p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.68;
  max-width: 56ch;
  margin: 0;
}

/* ---------- 问答卡 ---------- */
.page-faq .qa {
  border: var(--hair);
  border-radius: var(--r-m);
  background: linear-gradient(180deg, rgba(21, 34, 56, 0.5), rgba(14, 22, 38, 0.88));
  overflow: hidden;
  scroll-margin-top: 96px;
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

.page-faq .qa:hover {
  border-color: rgba(127, 231, 255, 0.34);
}

.page-faq .qa[open] {
  border-color: rgba(127, 231, 255, 0.3);
  box-shadow: var(--shadow-1);
}

.page-faq .qa__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t) var(--ease);
}

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

.page-faq .qa__head:hover {
  background: var(--faq-soft);
}

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__idx {
  flex: none;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
  background: var(--cyan-soft);
  border-radius: var(--r-s);
  padding: 4px 8px;
  margin-top: 1px;
}

.page-faq .qa__title {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.45;
  letter-spacing: -0.012em;
}

.page-faq .qa__chev {
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(225deg);
  border-color: var(--cyan);
}

.page-faq .qa__body {
  padding: 15px 16px 18px;
  border-top: var(--hair);
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .qa__body > * + * {
  margin-top: 12px;
}

.page-faq .qa__body p {
  margin: 0;
}

.page-faq .qa__body a {
  color: var(--cyan);
}

.page-faq .qa__note {
  font-size: 13px;
  line-height: 1.65;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  color: var(--muted);
}

.page-faq .qa__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .qa__media {
  margin-top: 14px;
}

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

/* ---------- 步骤卡 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .step {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-m);
  background: rgba(127, 231, 255, 0.045);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-faq .step:hover {
  background: rgba(127, 231, 255, 0.1);
  border-color: rgba(127, 231, 255, 0.32);
  transform: translateX(3px);
}

.page-faq .step__num {
  flex: none;
  width: 28px;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-faq .step__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14.5px;
  line-height: 1.4;
  color: var(--text);
  margin: 0;
}

.page-faq .step__text {
  margin: 3px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 联系方式行 ---------- */
.page-faq .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  border: var(--hair);
  border-radius: var(--r-m);
  background: rgba(7, 11, 20, 0.5);
}

.page-faq .contact-line + .contact-line {
  margin-top: 9px;
}

.page-faq .contact-line__label {
  flex: none;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-faq .contact-line__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 尾部 ---------- */
.page-faq .faq-tail__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 20px;
  border: var(--hair);
  border-radius: var(--r-l);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(255, 138, 61, 0.16), rgba(255, 138, 61, 0) 58%),
    linear-gradient(150deg, rgba(21, 34, 56, 0.95), rgba(7, 11, 20, 0.96));
  box-shadow: var(--shadow-2);
  padding: clamp(22px, 4vw, 40px);
}

.page-faq .faq-tail__copy h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.22;
  letter-spacing: -0.026em;
  margin: 10px 0 10px;
  max-width: 24ch;
}

.page-faq .faq-tail__copy p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
  margin: 0;
  max-width: 58ch;
}

.page-faq .faq-tail__actions {
  align-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-tail__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 266px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: 1fr;
  }

  .page-faq .qa__head {
    padding: 13px 13px;
    gap: 9px;
  }

  .page-faq .qa__body {
    padding: 13px 13px 16px;
  }

  .page-faq .contact-line__value {
    font-size: 13px;
  }

  .page-faq .step {
    gap: 10px;
    padding: 11px 12px;
  }
}