.page-faq {
  --faq-line: rgba(216, 242, 222, .16);
  --faq-pad: clamp(10px, 1.6vw, 16px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 4vw, 48px) 0 clamp(14px, 2.4vw, 26px);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.8vw, 78px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--chalk);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  color: rgba(242, 251, 244, .82);
}

.page-faq .faq-banner {
  margin: clamp(4px, 1.4vw, 14px) 0 clamp(24px, 4vw, 46px);
  border: 1px solid var(--faq-line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

/* ---------- 高频三问 ---------- */
.page-faq .faq-quick-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-quick-item {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--neon);
  background: linear-gradient(160deg, rgba(14, 42, 31, .72), rgba(7, 26, 19, .35));
  box-shadow: var(--shadow);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-quick-item:hover {
  border-color: rgba(198, 255, 61, .42);
  transform: translateY(-4px);
}

.page-faq .faq-quick-num {
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--neon);
  margin-bottom: 10px;
}

.page-faq .faq-quick-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.45;
  color: var(--chalk);
}

.page-faq .faq-quick-item p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(242, 251, 244, .78);
}

/* ---------- 主布局：索引 + 手风琴 ---------- */
.page-faq .faq-layout {
  display: block;
}

.page-faq .faq-index {
  margin-bottom: 26px;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 6px;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-list a {
  display: block;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--faq-line);
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--chalk);
  border-color: var(--neon);
  background: rgba(30, 68, 51, .55);
  outline: none;
}

/* ---------- 分类分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(30px, 4.6vw, 52px);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

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

.page-faq .faq-group-head {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule-strong);
  margin-bottom: 2px;
}

.page-faq .faq-group-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -.01em;
  color: var(--chalk);
}

.page-faq .faq-group-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--faq-line);
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-item:first-of-type {
  border-top: 0;
}

.page-faq .faq-item[open] {
  background: rgba(14, 42, 31, .45);
  border-top-color: rgba(198, 255, 61, .35);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  padding: clamp(15px, 2.2vw, 21px) var(--faq-pad);
  cursor: pointer;
  list-style: none;
  transition: background-color .2s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--mist);
  transition: color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--neon);
}

.page-faq .faq-item summary:hover::after {
  color: var(--neon);
}

.page-faq .faq-item summary:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--neon);
}

.page-faq .faq-num {
  flex: 0 0 auto;
  font-size: clamp(14px, 1.7vw, 18px);
  line-height: 1.6;
  color: rgba(198, 255, 61, .4);
  transition: color .25s var(--ease);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--neon);
}

.page-faq .faq-q {
  margin: 0;
  flex: 1 1 auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15.5px, 1.9vw, 19px);
  line-height: 1.55;
  color: var(--chalk);
}

.page-faq .faq-answer {
  padding: 0 var(--faq-pad) clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 251, 244, .8);
}

.page-faq .faq-go {
  display: inline-block;
  margin-top: 2px;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .35);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-go::after {
  content: " →";
  font-family: var(--font-mono);
}

.page-faq .faq-go:hover,
.page-faq .faq-go:focus-visible {
  color: var(--chalk);
  border-bottom-color: var(--neon);
  outline: none;
}

/* ---------- 自助排查三步 ---------- */
.page-faq .faq-steps-sec {
  margin-top: clamp(34px, 5vw, 64px);
}

.page-faq .faq-steps {
  display: grid;
  gap: clamp(22px, 3.2vw, 34px);
}

.page-faq .faq-steps-art {
  border: 1px solid var(--faq-line);
  overflow: hidden;
  max-width: 320px;
}

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

.page-faq .faq-step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 26px);
}

.page-faq .faq-step {
  position: relative;
  padding-left: 28px;
}

.page-faq .faq-step-dot {
  position: absolute;
  top: 7px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--neon);
  transform: rotate(45deg);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  bottom: calc(-1 * clamp(20px, 3vw, 26px));
  width: 1px;
  background: var(--faq-line);
}

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

.page-faq .faq-step-num {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.1vw, 21px);
  color: var(--chalk);
}

.page-faq .faq-step p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(242, 251, 244, .78);
}

/* ---------- 收束区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(36px, 5.4vw, 70px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-faq .faq-cta-box {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 52px);
  border: 1px solid var(--rule-strong);
  background: linear-gradient(135deg, rgba(14, 42, 31, .95) 0%, rgba(7, 26, 19, .92) 58%, rgba(30, 68, 51, .6) 100%);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-cta-box::after {
  content: "";
  position: absolute;
  top: -46%;
  right: -14%;
  width: 260px;
  height: 260px;
  background: linear-gradient(180deg, rgba(198, 255, 61, .2), rgba(198, 255, 61, 0));
  transform: skewX(-6deg) rotate(14deg);
  pointer-events: none;
}

.page-faq .faq-cta-box h2 {
  position: relative;
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--chalk);
}

.page-faq .faq-cta-text {
  position: relative;
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 251, 244, .8);
}

.page-faq .faq-cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-quick-list {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }

  .page-faq .faq-quick-item:nth-child(2) {
    margin-top: 18px;
  }

  .page-faq .faq-quick-item:nth-child(3) {
    margin-top: 36px;
  }

  .page-faq .faq-steps {
    grid-template-columns: minmax(200px, 300px) 1fr;
    align-items: start;
  }

  .page-faq .faq-step-list {
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(16px, 2.2vw, 26px);
  }

  .page-faq .faq-step {
    padding-left: 0;
    padding-top: 30px;
  }

  .page-faq .faq-step-dot {
    top: 5px;
    left: 0;
  }

  .page-faq .faq-step::before {
    left: 16px;
    right: calc(-1 * clamp(16px, 2.2vw, 26px));
    top: 9px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-faq .faq-answer {
    padding-left: calc(var(--faq-pad) + clamp(12px, 2vw, 22px) + 3.6em);
  }
}

/* ---------- 桌面：常驻竖排索引 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    margin-bottom: 0;
    align-self: start;
  }

  .page-faq .faq-index-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-index-list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index-list a {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 12px;
    font-size: 15px;
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    border-left-color: var(--neon);
    background: rgba(30, 68, 51, .5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick-item,
  .page-faq .faq-item summary::after,
  .page-faq .faq-go {
    transition: none;
  }

  .page-faq .faq-quick-item:hover {
    transform: none;
  }
}