/* ============ 帮助中心 FAQ ============ */
.page-faq {
  --faq-idx: 74px;
  background: var(--abyss);
  color: var(--ice);
  overflow-x: clip;
}

.page-faq .page-faq__crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(20px, 3.5vw, 44px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.4vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-faq .faq-hero__hl {
  display: inline-block;
  color: var(--cyan);
  border-bottom: 3px solid var(--coral);
  padding-bottom: 2px;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.85;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  background: var(--panel);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
}

.page-faq .faq-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.06);
}

.page-faq .faq-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 14px;
  background: var(--cyan);
  color: var(--abyss);
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding: clamp(36px, 6vw, 76px) 0;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-section__index {
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--grid);
}

@supports not (-webkit-text-stroke: 1px red) {
  .page-faq .faq-section__index {
    color: var(--grid);
  }
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-section__note {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  position: relative;
  border: 1px solid var(--grid);
  background: rgba(12, 35, 56, 0.45);
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .qa[open] {
  border-color: rgba(43, 232, 200, 0.55);
  background: rgba(12, 35, 56, 0.92);
}

.page-faq .qa[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: var(--faq-idx) minmax(0, 1fr) 26px;
  align-items: center;
  gap: 12px;
  padding: 16px;
  min-height: 56px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-family: var(--font-num);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  color: var(--mist);
  border-left: 1px solid var(--grid);
  padding-left: 10px;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-faq .qa[open] .qa__num {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-faq .qa__q {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ice);
}

.page-faq .qa__arrow {
  position: relative;
  width: 26px;
  height: 26px;
  justify-self: end;
}

.page-faq .qa__arrow::before,
.page-faq .qa__arrow::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform 0.22s ease, background-color 0.22s ease;
}

.page-faq .qa__arrow::before {
  left: 5px;
  top: 12.5px;
  width: 16px;
  height: 1px;
}

.page-faq .qa__arrow::after {
  left: 12.5px;
  top: 5px;
  width: 1px;
  height: 16px;
}

.page-faq .qa[open] .qa__arrow::before {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__arrow::after {
  transform: scaleY(0);
}

.page-faq .qa__body {
  padding: 0 16px 20px 16px;
}

.page-faq .qa__body > p {
  margin: 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .qa__link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.5);
}

.page-faq .qa__link:hover {
  border-bottom-color: var(--cyan);
}

/* 步骤条 */
.page-faq .qa__steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa__step {
  counter-increment: faqstep;
  position: relative;
  padding-left: 28px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--ice);
}

.page-faq .qa__step::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.2em;
  font-family: var(--font-num);
  font-size: 0.7rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .qa__step::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.5em;
  bottom: -8px;
  width: 1px;
  background: var(--grid);
}

.page-faq .qa__step:last-child::after {
  display: none;
}

.page-faq .qa[open] .qa__step {
  animation: faq-step-in 0.32s ease both;
}

.page-faq .qa[open] .qa__step:nth-child(2) {
  animation-delay: 0.07s;
}

.page-faq .qa[open] .qa__step:nth-child(3) {
  animation-delay: 0.14s;
}

.page-faq .qa[open] .qa__step:nth-child(4) {
  animation-delay: 0.21s;
}

@keyframes faq-step-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 收藏区图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 20px;
}

.page-faq .faq-split__figure {
  margin: 0;
  border: 1px solid var(--grid);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-split__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.page-faq .faq-split__cap {
  display: block;
  padding: 12px 16px 16px;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--grid);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  padding: clamp(36px, 6vw, 76px) 0;
  border-top: 1px solid var(--grid);
  background:
    linear-gradient(180deg, rgba(12, 35, 56, 0.72), rgba(6, 19, 32, 0.95)),
    var(--abyss);
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-contact__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-contact__text {
  margin: 14px 0 0;
  max-width: 42ch;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.85;
}

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

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-contact__key {
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  padding-top: 3px;
}

.page-faq .faq-contact__val {
  margin: 0;
  color: var(--ice);
  font-size: 0.96rem;
  line-height: 1.65;
  word-break: break-word;
}

.page-faq .faq-contact__val a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.5);
}

.page-faq .faq-contact__val a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 768px) {
  .page-faq .qa__summary {
    padding: 18px 22px;
  }

  .page-faq .qa__body {
    padding: 0 22px 22px calc(22px + var(--faq-idx) + 12px);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq {
    --faq-idx: 88px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 5vw, 72px);
  }

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

  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-split__figure {
    transform: translateY(28px);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 36px;
  }

  .page-faq .faq-split__figure {
    transform: translateY(52px);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__num,
  .page-faq .qa__arrow::before,
  .page-faq .qa__arrow::after {
    transition: none;
  }

  .page-faq .qa__step,
  .page-faq .qa[open] .qa__step {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .page-faq .faq-split__figure {
    transform: none;
  }
}