.page-faq {
  --faq-rail: 240px;
  --faq-line: rgba(169, 194, 208, 0.16);
  --faq-line-strong: rgba(169, 194, 208, 0.34);
  --faq-reading: rgba(244, 239, 228, 0.8);
  background: var(--ink);
  color: var(--paper);
  position: relative;
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 36px) 0 clamp(34px, 6vw, 68px);
  background:
    radial-gradient(120% 140% at 88% -20%, rgba(49, 242, 210, 0.14), transparent 62%),
    linear-gradient(150deg, var(--ink-2) 0%, var(--ink) 64%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 62%;
  height: 260px;
  background: linear-gradient(115deg, rgba(255, 107, 61, 0.28), rgba(255, 107, 61, 0) 72%);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__text .breadcrumb {
  margin-bottom: 18px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.012em;
  margin: 10px 0 0;
  max-width: 16em;
}

.page-faq .faq-hero .lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--faq-reading);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 8px 13px;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius);
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

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

.page-faq .faq-glance {
  position: relative;
  padding: 20px 22px 18px;
  background: linear-gradient(180deg, rgba(23, 60, 70, 0.72), rgba(16, 43, 64, 0.42));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-faq .faq-glance::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 2px;
  background: var(--orange);
}

.page-faq .faq-glance__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

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

.page-faq .glance-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-faq .glance-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .glance-key {
  color: var(--mist);
}

.page-faq .glance-val {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 14px;
  white-space: nowrap;
}

.page-faq .faq-glance__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 4vw, 52px);
  padding-top: clamp(28px, 5vw, 62px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-index {
  border-left: 2px solid var(--faq-line);
  padding-left: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--faq-line-strong);
  outline: none;
}

.page-faq .faq-index__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.72;
}

.page-faq .faq-section {
  border-top: 1px solid var(--faq-line);
  padding-top: clamp(22px, 3.6vw, 38px);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(34px, 6vw, 68px);
}

.page-faq .faq-section__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.06;
  letter-spacing: -0.008em;
  margin: 8px 0 0;
}

.page-faq .faq-section__intro {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--faq-reading);
}

/* ---------- 步骤条 ---------- */
.page-faq .stepper {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .step-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .step-tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .step-tab {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 15px 14px;
  cursor: pointer;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-top: 2px solid var(--faq-line-strong);
  border-radius: var(--radius);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .step-tab:hover {
  background: var(--ink-3);
}

.page-faq .step-tab__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .step-tab__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16.5px;
  line-height: 1.3;
  color: var(--ice);
}

.page-faq #faq-step1:checked ~ .step-tabs [for="faq-step1"],
.page-faq #faq-step2:checked ~ .step-tabs [for="faq-step2"],
.page-faq #faq-step3:checked ~ .step-tabs [for="faq-step3"] {
  background: rgba(23, 60, 70, 0.9);
  border-color: var(--faq-line-strong);
  border-top-color: var(--cyan);
}

.page-faq #faq-step1:checked ~ .step-tabs [for="faq-step1"] .step-tab__num,
.page-faq #faq-step2:checked ~ .step-tabs [for="faq-step2"] .step-tab__num,
.page-faq #faq-step3:checked ~ .step-tabs [for="faq-step3"] .step-tab__num {
  color: var(--cyan);
}

.page-faq #faq-step1:checked ~ .step-tabs [for="faq-step1"] .step-tab__name,
.page-faq #faq-step2:checked ~ .step-tabs [for="faq-step2"] .step-tab__name,
.page-faq #faq-step3:checked ~ .step-tabs [for="faq-step3"] .step-tab__name {
  color: var(--paper);
}

.page-faq #faq-step1:focus-visible ~ .step-tabs [for="faq-step1"],
.page-faq #faq-step2:focus-visible ~ .step-tabs [for="faq-step2"],
.page-faq #faq-step3:focus-visible ~ .step-tabs [for="faq-step3"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .step-panels {
  margin-top: 12px;
  padding: clamp(18px, 3vw, 28px);
  background: linear-gradient(180deg, rgba(23, 60, 70, 0.55), rgba(16, 43, 64, 0.34));
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
}

.page-faq .step-panel {
  display: none;
}

.page-faq #faq-step1:checked ~ .step-panels .step-panel--1,
.page-faq #faq-step2:checked ~ .step-panels .step-panel--2,
.page-faq #faq-step3:checked ~ .step-panels .step-panel--3 {
  display: block;
}

.page-faq .step-panel h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.25;
  margin: 0;
  color: var(--paper);
}

.page-faq .step-panel__lead {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-reading);
}

.page-faq .step-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .step-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--faq-reading);
}

.page-faq .step-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-tip {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--steel);
}

/* ---------- 筛选条件列表 ---------- */
.page-faq .filter-rows {
  margin-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .filter-row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .filter-row__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .filter-row__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-reading);
}

/* ---------- 要点列表 ---------- */
.page-faq .point-list {
  list-style: none;
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-faq .point-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-reading);
}

.page-faq .point-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-faq .point-list strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}

.page-faq .qa__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa__item > summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

.page-faq .qa__item > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa__item[open] > summary {
  color: var(--cyan);
}

.page-faq .qa__item[open] > summary::after {
  content: "−";
}

.page-faq .qa__item > summary:hover {
  color: var(--cyan);
}

.page-faq .qa__item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa__body {
  padding: 0 0 18px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--faq-reading);
}

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

/* ---------- 双栏区块 ---------- */
.page-faq .split {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-faq .split__figure {
  margin-top: 0;
}

/* ---------- 联系区 ---------- */
.page-faq .contact-list {
  margin-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .contact-row {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .contact-row__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-faq .contact-row__val {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-note {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-reading);
  border-left: 2px solid var(--yellow);
  padding-left: 12px;
}

.page-faq .faq-inline-link {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .filter-row {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-faq .contact-row {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .step-tabs {
    flex-direction: row;
  }

  .page-faq .step-tab {
    flex: 1 1 0;
    min-width: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 14px 15px 16px;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
  }

  .page-faq .split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index__link {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .step-tab,
  .page-faq .faq-index__link,
  .page-faq .qa__item > summary {
    transition: none;
  }
}