.page-faq {
  --faq-qa-num: clamp(44px, 6vw, 68px);
  --faq-block-gap: clamp(20px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 48px) 0 clamp(36px, 6vw, 68px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: min(620px, 78vw);
  height: 150%;
  background: linear-gradient(152deg, rgba(43, 245, 200, 0.15), rgba(43, 245, 200, 0) 66%);
  clip-path: polygon(42% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(20px, 4vw, 36px);
}

.page-faq .faq-hero__lead {
  max-width: 46em;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(34px, 8vw, 82px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero__lede {
  margin-top: clamp(16px, 2.5vw, 24px);
}

.page-faq .faq-hero__jump {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-hero__jump li {
  background: var(--ink-950);
}

.page-faq .faq-hero__jump a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-left-color: var(--signal);
  background: var(--ink-800);
  outline: none;
}

.page-faq .faq-hero__jump .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-section {
  padding: clamp(40px, 7vw, 84px) 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-faq .faq-head {
  max-width: 52em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-head .lede {
  margin-top: 12px;
}

/* ---------- 三步流程条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.5vw, 22px);
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  border-top-color: var(--signal);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-step__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(26px, 4.5vw, 46px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  object-fit: cover;
  background: var(--ink-800);
}

.page-faq .faq-figure__cap {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 问答列表 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  padding-left: clamp(12px, 2vw, 22px);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(43, 245, 200, 0.07), rgba(43, 245, 200, 0) 42%);
}

.page-faq .qa:target {
  border-left-color: var(--signal);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: var(--faq-qa-num) 1fr 18px;
  align-items: center;
  gap: 4px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__head:focus-visible {
  outline: 1px solid var(--line-strong);
  outline-offset: 4px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--cyan);
}

.page-faq .qa__q {
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__head:hover .qa__q {
  color: var(--cyan-soft);
}

.page-faq .qa__icon {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .qa__icon::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1.5px;
}

.page-faq .qa__icon::after {
  top: 0;
  left: 6px;
  width: 1.5px;
  height: 14px;
}

.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
}

.page-faq .qa[open] .qa__icon::before {
  background: var(--signal);
}

.page-faq .qa__a {
  padding: 0 0 clamp(20px, 3vw, 28px) calc(var(--faq-qa-num) + 14px);
  max-width: 46em;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__note {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--cyan-soft);
  background: rgba(11, 42, 35, 0.7);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .qa-steps {
  list-style: none;
  counter-reset: qa-step;
  display: grid;
  gap: 9px;
  margin: 14px 0 14px;
  padding: 0;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: qa-step;
  padding-left: 34px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .qa-steps li::before {
  content: counter(qa-step);
  position: absolute;
  top: 3px;
  left: 0;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal);
  border: 1px solid rgba(255, 106, 31, 0.55);
  border-radius: 50%;
}

/* ---------- 章节尾部动作 ---------- */
.page-faq .faq-more {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-section--help {
  background: var(--ink-800);
}

.page-faq .help {
  border: 1px solid var(--line-strong);
  background: var(--ink-950);
  padding: clamp(22px, 4vw, 40px);
}

.page-faq .help__grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-faq .help__item {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-faq .help__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .help__val {
  margin: 8px 0 0;
  font-size: clamp(19px, 2.6vw, 24px);
  color: var(--text);
  word-break: break-word;
}

.page-faq .help__val--mail {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2vw, 18px);
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.page-faq .help__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .help__foot {
  margin-top: clamp(22px, 3.5vw, 34px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 16px;
  align-items: center;
}

.page-faq .help__foottext {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-links {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-links li {
  background: var(--ink-800);
}

.page-faq .faq-links a {
  display: block;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

/* ---------- 窄屏 ---------- */
@media (max-width: 520px) {
  .page-faq .qa__head {
    grid-template-columns: 34px 1fr 16px;
    gap: 4px 10px;
  }

  .page-faq .qa__a {
    padding-left: 0;
  }

  .page-faq .qa {
    padding-left: 10px;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.85fr);
    align-items: start;
  }

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

  .page-faq .help__foot {
    grid-template-columns: 1fr auto;
  }

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

/* ---------- 宽屏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 0;
    width: 12px;
    height: 12px;
    translate: 62% -50%;
    rotate: 45deg;
    border-top: 1px solid var(--cyan);
    border-right: 1px solid var(--cyan);
  }

  .page-faq .faq-figure--inline {
    max-width: 760px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__num,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-step,
  .page-faq .faq-hero__jump a,
  .page-faq .faq-links a {
    transition: none;
  }

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