.page-faq {
  --faq-index-w: 300px;
  --faq-line: rgba(222, 213, 198, 0.14);
  --faq-line-solid: rgba(222, 213, 198, 0.22);
  display: block;
  background: var(--charcoal);
  color: var(--paper);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-total) + 28px);
  background:
    repeating-linear-gradient(90deg, rgba(244, 239, 230, 0.045) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(244, 239, 230, 0.045) 0 1px, transparent 1px 84px),
    linear-gradient(178deg, var(--ink) 0%, var(--charcoal) 82%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 62%;
  height: 360px;
  background: radial-gradient(58% 100% at 50% 50%, rgba(255, 90, 31, 0.24), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding: 22px 0 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.74);
  max-width: 46ch;
}

.page-faq .faq-hero .eyebrow {
  color: var(--amber);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 34px;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-stat {
  min-width: 88px;
}

.page-faq .faq-stat__label {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(244, 239, 230, 0.52);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  margin: 0;
  color: var(--amber);
  font-weight: 700;
}

.page-faq .faq-stat__unit {
  font-family: var(--font-sans);
  font-size: 13px;
  margin-left: 4px;
  color: rgba(244, 239, 230, 0.6);
}

/* ============ 筛选条 ============ */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 34px;
  padding: 20px 0 30px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-filter__btn {
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.05em;
  padding: 8px 17px;
  border-radius: 999px;
  border: 1px solid var(--faq-line-solid);
  background: transparent;
  color: rgba(244, 239, 230, 0.76);
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--signal);
  color: var(--paper);
}

.page-faq .faq-filter__btn[aria-pressed="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: #ffffff;
}

.page-faq .faq-filter__btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ============ 主体两栏 ============ */
.page-faq .faq-body {
  background: var(--charcoal);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

/* --- 左：索引 --- */
.page-faq .faq-index {
  background: var(--ink);
  padding: 26px 20px 30px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-index__title {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--moss);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-index__nav {
  display: flex;
  flex-direction: column;
}

.page-faq .faq-index__nav a {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--faq-line);
  text-decoration: none;
  color: rgba(244, 239, 230, 0.7);
  font-size: 14px;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-index__nav a:hover {
  color: var(--paper);
  transform: translateX(4px);
  background: rgba(255, 90, 31, 0.06);
}

.page-faq .faq-index__nav a.is-active {
  color: var(--paper);
}

.page-faq .faq-index__nav a.is-active .faq-index__text {
  box-shadow: inset 0 -2px 0 0 var(--signal);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--signal);
  letter-spacing: 0.08em;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: rgba(244, 239, 230, 0.36);
}

.page-faq .faq-index__note {
  margin: 20px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.46);
}

/* --- 右：答案 --- */
.page-faq .faq-answers {
  background: var(--paper);
  color: var(--charcoal);
  padding: 6px 20px 56px;
}

.page-faq .faq-section {
  padding: 36px 0 30px;
  border-top: 1px solid var(--printline);
}

.page-faq .faq-answers .faq-section:first-child {
  border-top: 0;
  padding-top: 26px;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal);
  border: 1px solid var(--signal);
  border-radius: var(--radius);
  padding: 2px 7px;
  line-height: 1.4;
}

.page-faq .faq-section h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 25px;
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--charcoal);
}

.page-faq .faq-section__intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
  max-width: 60ch;
}

.page-faq .faq-section__tail {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
  padding-top: 18px;
  border-top: 1px dashed var(--printline);
}

.page-faq .faq-section__tail a {
  color: var(--signal);
  text-decoration: none;
  box-shadow: inset 0 -1px 0 0 rgba(255, 90, 31, 0.42);
  transition: box-shadow 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-section__tail a:hover {
  color: var(--charcoal);
  box-shadow: inset 0 -1px 0 0 var(--charcoal);
}

/* --- 三步操作 --- */
.page-faq .faq-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .faq-step {
  position: relative;
  padding-left: 46px;
  padding-bottom: 24px;
}

.page-faq .faq-step:last-child {
  padding-bottom: 4px;
}

.page-faq .faq-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  bottom: 4px;
  width: 1px;
  background: var(--printline);
}

.page-faq .faq-step__dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  border: 1px solid var(--signal);
  background: var(--paper);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.page-faq .faq-step__title {
  margin: 4px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--charcoal);
}

.page-faq .faq-step p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--stone);
}

/* --- 图 --- */
.page-faq .faq-figure {
  margin: 26px 0 0;
  border: 1px solid var(--printline);
  border-radius: var(--radius);
  background: #ffffff;
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--moss);
}

.page-faq .faq-figure figcaption {
  padding: 11px 14px;
  border-top: 1px solid var(--printline);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--stone);
}

/* --- 折叠问答 --- */
.page-faq .faq-list {
  margin-top: 24px;
  border-top: 1px solid var(--printline);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--printline);
  transition: background 0.18s var(--ease);
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-item summary {
  position: relative;
  display: block;
  cursor: pointer;
  list-style: none;
  padding: 17px 42px 17px 2px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.62;
  color: var(--charcoal);
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 24px;
  width: 12px;
  height: 12px;
  background:
    linear-gradient(var(--signal), var(--signal)) center / 12px 1.5px no-repeat,
    linear-gradient(var(--signal), var(--signal)) center / 1.5px 12px no-repeat;
  transition: opacity 0.18s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  background: linear-gradient(var(--signal), var(--signal)) center / 12px 1.5px no-repeat;
}

.page-faq .faq-item summary:hover {
  color: var(--signal);
  padding-left: 6px;
}

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

.page-faq .faq-item__a {
  padding: 0 42px 20px 2px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--stone);
}

/* ============ 人工协助 ============ */
.page-faq .faq-help {
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(31, 111, 74, 0.32), transparent 68%),
    var(--ink);
  padding: 54px 0 64px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-faq .faq-help .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-help h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 8px 0 0;
  color: var(--paper);
}

.page-faq .faq-help__intro p {
  margin: 14px 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.7);
  max-width: 46ch;
}

.page-faq .faq-help__contacts {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line-solid);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-contact {
  background: var(--ink);
  padding: 18px 18px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
}

.page-faq .faq-contact__label {
  flex: 0 0 100%;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-faq .faq-contact__value {
  font-size: 15px;
  font-family: var(--font-mono);
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-faq .faq-contact .copy-btn {
  margin-left: auto;
}

.page-faq .faq-contact__note {
  margin: 0;
  padding: 18px;
  background: var(--ink);
  font-size: 13px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.58);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-faq .faq-hero h1 {
    font-size: 38px;
  }

  .page-faq .faq-hero .lead {
    font-size: 16.5px;
  }

  .page-faq .faq-section h2 {
    font-size: 30px;
  }

  .page-faq .faq-section__intro {
    font-size: 15.5px;
  }

  .page-faq .faq-answers {
    padding: 8px 32px 64px;
  }

  .page-faq .faq-index {
    padding: 30px 28px 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--header-total) + 44px);
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: end;
    padding-top: 30px;
  }

  .page-faq .faq-hero h1 {
    font-size: 46px;
    max-width: 15ch;
  }

  .page-faq .faq-hero__stats {
    justify-content: flex-end;
    padding-top: 0;
    border-top: 0;
    border-bottom: 1px solid var(--faq-line);
    padding-bottom: 22px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: 5fr 6fr;
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) 1fr;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--header-total);
    max-height: calc(100vh - var(--header-total));
    overflow-y: auto;
    border-top: 0;
    border-right: 1px solid var(--faq-line);
    padding: 40px 26px 48px;
  }

  .page-faq .faq-index__nav a {
    grid-template-columns: 32px 1fr auto;
  }

  .page-faq .faq-answers {
    padding: 12px 54px 88px;
  }

  .page-faq .faq-answers .faq-section:first-child {
    padding-top: 34px;
  }

  .page-faq .faq-section {
    padding: 48px 0 40px;
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-index-w: 340px;
  }

  .page-faq .faq-hero h1 {
    font-size: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-filter__btn,
  .page-faq .faq-index__nav a,
  .page-faq .faq-item summary,
  .page-faq .faq-section__tail a {
    transition: none;
  }

  .page-faq .faq-index__nav a:hover,
  .page-faq .faq-item summary:hover {
    transform: none;
  }
}