/* ===== 常见问答页 ===== */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(20px, 4vw, 44px) 0 clamp(28px, 5vw, 56px);
  background:
    radial-gradient(112% 82% at 94% -22%, rgba(47, 243, 200, 0.14), transparent 62%),
    linear-gradient(180deg, rgba(11, 58, 44, 0.62), rgba(5, 35, 27, 0));
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(47, 243, 200, 0.06) 72%, transparent);
  transform: skewY(-1.1deg);
  opacity: 0.55;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--ff-display);
  font-size: var(--fs-display);
  line-height: 1.04;
  letter-spacing: -0.035em;
  color: var(--bone);
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 62ch;
  font-family: var(--ff-body);
  font-size: var(--fs-lead);
  line-height: 1.75;
  color: var(--mist);
}

/* 布局：窄索引栏 + 宽答案区 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding-block: clamp(28px, 5vw, 64px) clamp(44px, 7vw, 88px);
}

.page-faq .faq-index {
  border-top: 2px solid var(--hair-strong);
  padding-top: 16px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 20px;
  padding: 0;
}

.page-faq .faq-index__list li + li a {
  border-top: 1px solid var(--hair-soft);
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 2px;
  color: var(--mist);
  font-family: var(--ff-body);
  font-size: 0.9375rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--cyan);
  padding-left: 6px;
}

.page-faq .faq-index__no {
  font-family: var(--ff-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .faq-index__cta {
  width: 100%;
  justify-content: center;
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 84px);
  padding-top: clamp(30px, 5vw, 60px);
  border-top: 1px solid var(--hair-soft);
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-group__no {
  margin: 0;
  flex: 0 0 auto;
  font-family: var(--ff-mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--bone);
}

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

.page-faq .faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 问答列表 */
.page-faq .faq-list {
  border-top: 1px solid var(--hair);
}

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

.page-faq .faq-item summary {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 15px 2px;
  list-style: none;
  cursor: pointer;
  font-family: var(--ff-body);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--bone);
  transition: color 0.2s ease;
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--cyan);
}

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

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  background: rgba(47, 243, 200, 0.12);
  border: 1px solid var(--hair-strong);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 74% 100%, 0 100%);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1.5px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform 0.24s ease, opacity 0.24s ease;
}

.page-faq .faq-q__sign::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-q__sign::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

/* 答案区 */
.page-faq .faq-a {
  position: relative;
  padding: 2px 0 22px 34px;
}

.page-faq .faq-a::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 4px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 243, 200, 0.1));
}

.page-faq .faq-a p {
  margin: 0 0 12px;
  max-width: 62ch;
  color: var(--mist);
  font-family: var(--ff-body);
  font-size: 0.9688rem;
  line-height: 1.78;
}

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

.page-faq .faq-a strong {
  color: var(--bone);
  font-weight: 600;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* 步骤：切角序号块 */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  color: var(--mist);
  font-family: var(--ff-body);
  font-size: 0.9688rem;
  line-height: 1.7;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--night);
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

/* 联系区块 */
.page-faq .faq-contact {
  margin-top: clamp(44px, 7vw, 88px);
}

.page-faq .faq-contact h2 {
  color: var(--bone);
}

.page-faq .faq-contact__body > p {
  margin: 0 0 18px;
  max-width: 60ch;
  color: rgba(243, 248, 245, 0.78);
  font-family: var(--ff-body);
  font-size: 0.9688rem;
  line-height: 1.78;
}

.page-faq .faq-contact__list {
  margin: 0 0 18px;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(243, 248, 245, 0.18);
}

.page-faq .faq-contact__list dt {
  flex: 0 0 auto;
  min-width: 5.5em;
  font-family: var(--ff-serif);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-faq .faq-contact__list dd {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--bone);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__more {
  margin: 0;
}

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

/* 平板与桌面 */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(210px, 0.32fr) minmax(0, 0.68fr);
    gap: clamp(48px, 6vw, 96px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 28px);
  }

  .page-faq .faq-group__head {
    gap: 18px;
  }

  .page-faq .faq-a {
    padding-left: 42px;
  }

  .page-faq .faq-a::before {
    left: 13px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-a {
    padding-left: 24px;
  }

  .page-faq .faq-a::before {
    left: 7px;
  }

  .page-faq .faq-steps li {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-contact__list > div {
    display: grid;
    gap: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary,
  .page-faq .faq-index__list a,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after {
    transition: none;
  }
}