/* =========================================================
   合作指南 /guide/ —— 页面专属样式
   作用域：.page-faq
   ========================================================= */

.page-faq {
  --faq-shard: linear-gradient(158deg, #A63A22 0%, #C96A3F 40%, #6B4A32 100%);
  --faq-rail-w: 252px;
  --faq-rail-gap: 64px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-hero__shard {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 38%;
  background: var(--faq-shard);
  opacity: .16;
  clip-path: polygon(0 46%, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 24px;
  padding-bottom: 48px;
}

.page-faq .faq-hero .breadcrumb {
  margin: 0 0 26px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  max-width: 34rem;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.05rem, 8.4vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 0 0 32px;
  max-width: 38rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
  opacity: .86;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--rule-strong);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.page-faq .faq-hero__fact-num {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__fact-label {
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--tea);
}

/* ---------- 主栅格：左索引 + 右问答流 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 40px;
  padding-bottom: 64px;
}

.page-faq .faq-stream {
  min-width: 0;
}

/* ---------- 左侧章节索引 ---------- */

.page-faq .coord-index.faq-rail {
  position: static;
  inset: auto;
  transform: none;
  width: auto;
  max-width: none;
  height: auto;
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
  box-shadow: none;
  z-index: 1;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule-strong);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--tea);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-rail__list li {
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--rule);
  color: var(--ink);
  font-size: .8125rem;
  line-height: 1.4;
  text-decoration: none;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--clay);
}

.page-faq .faq-rail__list a:hover {
  background: var(--sand);
  border-color: var(--rule-strong);
}

.page-faq .faq-rail__list a.is-current {
  background: var(--clay);
  border-color: var(--clay);
  color: #fff;
}

.page-faq .faq-rail__list a.is-current .faq-rail__num {
  color: var(--pale-gold);
}

/* ---------- 章节块 ---------- */

.page-faq .faq-block {
  scroll-margin-top: 112px;
}

.page-faq .faq-block + .faq-block {
  margin-top: 56px;
}

.page-faq .faq-block__head {
  margin-bottom: 22px;
}

.page-faq .faq-block__head .eyebrow {
  margin: 0 0 10px;
}

.page-faq .faq-block__head .section-title {
  margin: 0 0 10px;
}

.page-faq .faq-block__head .section-note {
  margin: 0;
  max-width: 54ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--tea);
}

/* ---------- 问答手风琴 ---------- */

.page-faq .qa-list {
  border-top: 1px solid var(--rule-strong);
}

.page-faq .qa {
  border-bottom: 1px solid var(--rule);
}

.page-faq .qa__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq .qa__num {
  display: inline-block;
  padding: 4px 8px 5px;
  background: var(--clay);
  color: #fff;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1;
  letter-spacing: .07em;
  white-space: nowrap;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.page-faq .qa__row:hover .qa__num {
  background: var(--clay-soft);
  color: #fff;
}

.page-faq .qa[open] .qa__num,
.page-faq .qa[open] .qa__row:hover .qa__num {
  background: var(--gold);
  color: var(--pit);
}

.page-faq .qa__q {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.55;
  letter-spacing: .004em;
  color: var(--ink);
}

.page-faq .qa__mark {
  position: relative;
  width: 15px;
  height: 15px;
  align-self: center;
  color: var(--tea);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .qa__mark::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa__mark::after {
  left: 50%;
  top: 0;
  width: 1.5px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 0 24px;
  animation: faq-drop .26s var(--ease) both;
}

@keyframes faq-drop {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-faq .qa__body strong {
  font-weight: 700;
  color: var(--clay);
}

.page-faq .qa__body a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- 横向提示带 ---------- */

.page-faq .faq-band {
  margin: 36px 0;
  padding: 20px 22px;
  background: var(--pit);
  border-left: 3px solid var(--gold);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-faq .faq-band__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  white-space: nowrap;
}

.page-faq .faq-band__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--pale-gold);
}

/* ---------- 图版 ---------- */

.page-faq .faq-figure {
  margin: 30px 0 0;
}

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

.page-faq .media--wide img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure--contact img {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-figure .media__caption {
  margin: 10px 0 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--tea);
}

/* ---------- 章节内提示条 ---------- */

.page-faq .faq-nudge {
  margin: 28px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--rule-strong);
  border-left: 3px solid var(--clay);
  background: var(--sand);
}

.page-faq .faq-nudge p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-nudge a {
  color: var(--clay);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 结尾对接区 ---------- */

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 26px 22px;
  border: 1px solid var(--rule-strong);
  background: var(--sand);
}

.page-faq .faq-contact__lead {
  margin: 0 0 20px;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-contact__list {
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}

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

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--tea);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-contact__value {
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-contact .btn {
  justify-self: start;
}

.page-faq .faq-figure--contact {
  margin: 0;
}

/* ---------- 平板以上 ---------- */

@media (min-width: 700px) {

  .page-faq .faq-band {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 22px 26px;
    margin: 44px 0;
  }

  .page-faq .faq-contact {
    padding: 32px 30px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {

  .page-faq .faq-hero__shard {
    left: auto;
    right: 0;
    top: 0;
    bottom: 0;
    width: 44%;
    height: auto;
    opacity: 1;
    clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-faq .faq-hero__inner {
    padding-top: 44px;
    padding-bottom: 88px;
  }

  .page-faq .faq-hero__title {
    max-width: 22rem;
  }

  .page-faq .faq-hero__lead {
    max-width: 30rem;
  }

  .page-faq .faq-hero__facts {
    max-width: 52%;
  }

  .page-faq .faq-hero__fact-num {
    font-size: 2rem;
  }
}

@media (min-width: 1000px) {

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-rail-gap);
    padding-top: 72px;
    padding-bottom: 96px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    border-top: 1px solid var(--rule);
  }

  .page-faq .faq-rail__list li {
    border-bottom: 1px solid var(--rule);
  }

  .page-faq .faq-rail__list a {
    width: 100%;
    padding: 12px 2px;
    border: 0;
    justify-content: flex-start;
  }

  .page-faq .faq-rail__list a:hover {
    background: transparent;
    color: var(--clay);
  }

  .page-faq .faq-rail__list a.is-current {
    background: transparent;
    color: var(--clay);
    box-shadow: inset 3px 0 0 var(--clay);
    padding-left: 10px;
  }

  .page-faq .faq-rail__list a.is-current .faq-rail__num {
    color: var(--gold);
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding: 38px 36px;
  }

  .page-faq .qa__q {
    font-size: 1.125rem;
  }
}

/* ---------- 减弱动效 ---------- */

@media (prefers-reduced-motion: reduce) {

  .page-faq .qa__body {
    animation: none;
  }

  .page-faq .qa__num,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}