.page-faq {
  --faq-sect: clamp(56px, 8vw, 104px);
  --faq-split-gap: clamp(22px, 3.4vw, 40px);
  --faq-case-pad: 18px;
  color: var(--paper);
  padding-bottom: clamp(64px, 9vw, 120px);
}

.page-faq .wrap {
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb {
  padding-top: clamp(18px, 3vw, 30px);
  font-size: 13px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero-frame {
  position: relative;
  margin-top: clamp(22px, 3.4vw, 40px);
  padding: clamp(30px, 4.6vw, 64px) clamp(18px, 3vw, 54px);
  border: 1px solid var(--line);
  background:
    radial-gradient(130% 130% at 10% -10%, rgba(212, 167, 44, 0.12), transparent 58%),
    radial-gradient(90% 90% at 100% 110%, rgba(53, 200, 255, 0.08), transparent 62%),
    linear-gradient(180deg, #0d1015, var(--ink) 72%);
  clip-path: var(--clip-lg);
  overflow: hidden;
}

.page-faq .faq-hero-frame::before,
.page-faq .faq-hero-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--gold) 0 2px, transparent 2px 46px);
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero-frame::before { top: 0; }
.page-faq .faq-hero-frame::after { bottom: 0; }

.page-faq .faq-kicker {
  margin: 0 0 18px;
  font: 600 12px/1.6 var(--font-mono);
  letter-spacing: 0.3em;
  color: var(--moss);
}

.page-faq .faq-hero-frame h1 {
  margin: 0 0 20px;
  max-width: 15em;
  font-size: clamp(32px, 5.4vw, 68px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--gray);
}

/* ---------- 四分类跳转带 ---------- */
.page-faq .faq-jump {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 3.6vw, 42px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-jump-item {
  display: block;
  padding: 16px 16px 20px;
  background: #10141a;
  color: var(--paper);
  text-decoration: none;
  transition: background 0.28s var(--ease);
}

.page-faq .faq-jump-item:hover,
.page-faq .faq-jump-item:focus-visible {
  background: #181e26;
}

.page-faq .faq-jump-bar {
  display: block;
  height: 3px;
  margin-bottom: 14px;
  background: var(--gold);
  transition: width 0.4s var(--ease);
}

.page-faq .faq-jump-item:nth-child(1) .faq-jump-bar { width: 100%; background: var(--gold); }
.page-faq .faq-jump-item:nth-child(2) .faq-jump-bar { width: 72%; background: var(--neon); }
.page-faq .faq-jump-item:nth-child(3) .faq-jump-bar { width: 56%; background: var(--clay); }
.page-faq .faq-jump-item:nth-child(4) .faq-jump-bar { width: 42%; background: var(--moss); }

.page-faq .faq-jump-num {
  display: block;
  margin-bottom: 8px;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.24em;
  color: var(--gray);
}

.page-faq .faq-jump-t {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

/* ---------- 图片 ---------- */
.page-faq .faq-hero-fig {
  margin: clamp(26px, 4vw, 46px) 0 0;
}

.page-faq .faq-hero-fig .figure-img {
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  display: block;
  border: 1px solid var(--line);
  clip-path: var(--clip-md);
}

.page-faq .faq-midfig {
  margin: var(--faq-sect) 0 0;
}

.page-faq .faq-midfig .figure-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  border: 1px solid var(--line);
  clip-path: var(--clip-md);
}

.page-faq .figure-cap {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 章节块 ---------- */
.page-faq .faq-block {
  padding-top: var(--faq-sect);
  scroll-margin-top: 96px;
}

.page-faq .faq-band {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-faq .faq-band-num {
  flex: none;
  padding: 5px 9px;
  font: 700 12px/1 var(--font-mono);
  color: var(--ink);
  background: var(--gold);
  clip-path: var(--clip-xs);
}

.page-faq .faq-band-txt {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--gray);
}

.page-faq .faq-band-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.page-faq .faq-head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-faq .faq-head h2 {
  margin: 0;
  font-size: clamp(23px, 3.1vw, 38px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.22;
  color: var(--paper);
}

.page-faq .faq-head h2::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 15px;
  background: var(--gold);
}

.page-faq .faq-head p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

/* ---------- 5/7 非对称栅格 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-split-gap);
}

/* ---------- 步骤轴 ---------- */
.page-faq .faq-axis-t {
  margin: 0 0 20px;
  font: 600 11.5px/1 var(--font-mono);
  letter-spacing: 0.26em;
  color: var(--gray);
}

.page-faq .step {
  position: relative;
  padding: 0 0 26px 42px;
  cursor: pointer;
  outline: none;
}

.page-faq .step:last-child {
  padding-bottom: 0;
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background: var(--line);
  transition: background 0.3s var(--ease);
}

.page-faq .step:last-child::before {
  display: none;
}

.page-faq .step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  font: 700 12px/1 var(--font-mono);
  color: var(--gold);
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-xs);
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .step-body h3 {
  margin: 2px 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color 0.3s var(--ease);
}

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

.page-faq .step:hover .step-num,
.page-faq .step:focus-visible .step-num {
  border-color: var(--gold);
}

.page-faq .step:focus-visible {
  box-shadow: 0 0 0 2px rgba(53, 200, 255, 0.55);
  border-radius: 2px;
}

.page-faq .step.is-lit .step-num {
  background: var(--moss);
  border-color: var(--moss);
  color: var(--ink);
}

.page-faq .step.is-lit .step-body h3 {
  color: var(--gold-lt);
}

.page-faq .step.is-lit::before {
  background: var(--moss);
}

/* ---------- 案例卡 ---------- */
.page-faq .faq-cases {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-case {
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-sm);
  transition: border-color 0.3s var(--ease);
}

.page-faq .faq-case:hover {
  border-color: rgba(212, 167, 44, 0.5);
}

.page-faq .faq-case summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 15px var(--faq-case-pad);
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-case summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

.page-faq .faq-case summary::after {
  content: "+";
  margin-left: auto;
  font: 400 18px/1 var(--font-mono);
  color: var(--gold);
}

.page-faq .faq-case[open] summary::after {
  content: "\2212";
}

.page-faq .faq-case-num {
  flex: none;
  padding: 4px 7px;
  font: 600 11.5px/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--gold);
  border: 1px solid rgba(212, 167, 44, 0.35);
  clip-path: var(--clip-xs);
}

.page-faq .faq-case-t {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-case-body {
  margin: 0 var(--faq-case-pad) 16px;
  padding: 12px 0 0;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 工单清单 ---------- */
.page-faq .faq-check {
  max-width: 720px;
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 2.8vw, 32px);
  background:
    linear-gradient(140deg, rgba(212, 167, 44, 0.07), transparent 55%),
    var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-md);
}

.page-faq .faq-contact-t {
  margin: 0 0 18px;
  font: 600 11.5px/1 var(--font-mono);
  letter-spacing: 0.26em;
  color: var(--gold);
}

.page-faq .faq-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact-k {
  flex: none;
  min-width: 5em;
  font-size: 13px;
  color: var(--gray);
}

.page-faq .faq-contact-v {
  font: 600 15px/1.4 var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--gold-lt);
  word-break: break-all;
}

.page-faq .faq-contact .copy-btn {
  margin-left: auto;
  padding: 7px 14px;
  font: 600 12.5px/1 var(--font-sans);
  color: var(--paper);
  background: transparent;
  border: 1px solid var(--line);
  clip-path: var(--clip-xs);
  cursor: pointer;
  transition: border-color 0.28s var(--ease), color 0.28s var(--ease);
}

.page-faq .faq-contact .copy-btn:hover,
.page-faq .faq-contact .copy-btn:focus-visible {
  border-color: var(--gold);
  color: var(--gold-lt);
}

.page-faq .faq-contact .copy-btn.is-copied {
  border-color: var(--gold-lt);
  color: var(--gold-lt);
}

.page-faq .faq-contact-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-faq .faq-next-item {
  display: block;
  padding: 18px 20px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--clip-sm);
  text-decoration: none;
  transition: border-color 0.3s var(--ease);
}

.page-faq .faq-next-item:hover,
.page-faq .faq-next-item:focus-visible {
  border-color: var(--gold);
}

.page-faq .faq-next-t {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-next-d {
  display: block;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-jump {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 920px) {
  .page-faq .faq-split {
    grid-template-columns: 5fr 7fr;
    gap: clamp(32px, 4.4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-block.is-flip .faq-split {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .faq-block.is-flip .faq-steps {
    order: 2;
  }

  .page-faq .faq-block.is-flip .faq-cases {
    order: 1;
  }

  .page-faq .faq-check {
    max-width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump-item,
  .page-faq .faq-jump-bar,
  .page-faq .step-num,
  .page-faq .faq-case,
  .page-faq .faq-next-item,
  .page-faq .faq-contact .copy-btn {
    transition: none;
  }
}
</main>