/* ===== 帮助中心 page-faq ===== */

.page-faq {
  --faq-acc: var(--cyan);
  --faq-nav-top: 118px;
  --faq-gap: clamp(28px, 5vw, 52px);
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
  background:
    radial-gradient(1100px 520px at 10% -8%, rgba(0, 229, 255, .10), transparent 62%),
    radial-gradient(900px 440px at 94% 6%, rgba(255, 179, 0, .06), transparent 60%);
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 36px) 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, .7) 22%, rgba(255, 179, 0, .7) 58%, transparent);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 24ch;
  font-size: clamp(27px, 5.2vw, 50px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.012em;
  color: var(--panel);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: clamp(22px, 3.6vw, 32px);
  padding: 14px 18px;
  border: 2px solid var(--line-soft);
  border-left: 4px solid var(--cyan);
  border-radius: var(--radius-sm);
  background: linear-gradient(96deg, rgba(0, 229, 255, .12), rgba(17, 20, 24, .92) 46%);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-strip__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(57, 255, 20, .75);
}

.page-faq .faq-strip__label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-strip__text {
  flex: 1 1 240px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .faq-strip .btn {
  flex: 0 0 auto;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
  gap: 1px;
  margin-top: 18px;
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-stat {
  padding: 16px 18px;
  background: rgba(17, 20, 24, .93);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.15;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--gray);
}

/* ---------- 顶部宽幅图 ---------- */

.page-faq .faq-body {
  padding-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

/* ---------- 主体布局 ---------- */

.page-faq .faq-main {
  padding-top: var(--faq-gap);
}

.page-faq .faq-nav {
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-faq .faq-nav__title {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray);
}

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

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

.page-faq .faq-nav__list li {
  flex: 0 0 auto;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1.5px solid var(--line-soft);
  border-radius: var(--radius-pill);
  background: rgba(17, 20, 24, .72);
  color: var(--text);
  font-size: 13.5px;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-nav__link:hover {
  border-color: var(--cyan);
  color: var(--panel);
  text-decoration: none;
  background: rgba(0, 229, 255, .08);
}

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

.page-faq .faq-nav__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gray);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-nav__link[aria-current] {
  border-color: var(--lime);
  color: var(--panel);
  background: rgba(57, 255, 20, .08);
  text-decoration: none;
}

.page-faq .faq-nav__link[aria-current] .faq-nav__dot {
  background: var(--lime);
  box-shadow: 0 0 10px rgba(57, 255, 20, .85);
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-group {
  margin-bottom: var(--faq-gap);
  scroll-margin-top: 130px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-group--entry { --faq-acc: var(--cyan); }
.page-faq .faq-group--price { --faq-acc: var(--amber); }
.page-faq .faq-group--sub { --faq-acc: var(--lime); }
.page-faq .faq-group--account { --faq-acc: var(--violet); }
.page-faq .faq-group--contact { --faq-acc: var(--teal); }

.page-faq .faq-group__head {
  padding-top: 16px;
  margin-bottom: 18px;
  border-top: 2px solid var(--faq-acc);
}

.page-faq .faq-group__head .eyebrow {
  color: var(--faq-acc);
}

.page-faq .faq-group__title {
  margin: 8px 0 0;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.008em;
  color: var(--panel);
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gray);
}

.page-faq .faq-group__figure {
  margin: 0 0 20px;
  border: 2px solid var(--line-soft);
  border-left: 4px solid var(--lime);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  margin-bottom: 12px;
  border: 2px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(17, 20, 24, .94), rgba(10, 22, 40, .94));
  box-shadow: var(--shadow-soft);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--faq-acc);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  color: var(--panel);
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__index {
  flex: 0 0 auto;
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--faq-acc);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--faq-acc);
  transform: translateY(-50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

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

.page-faq .faq-item__a {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
  padding-top: 14px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

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

.page-faq .kbd {
  display: inline-block;
  padding: 1px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(0, 229, 255, .08);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .kbd--lime {
  border-color: rgba(57, 255, 20, .4);
  background: rgba(57, 255, 20, .1);
  color: var(--lime);
}

.page-faq .kbd--amber {
  border-color: rgba(255, 179, 0, .4);
  background: rgba(255, 179, 0, .1);
  color: var(--amber);
}

.page-faq .faq-mail {
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-all;
}

/* ---------- 底部延伸 ---------- */

.page-faq .faq-cta {
  margin-top: clamp(28px, 5vw, 48px);
}

.page-faq .faq-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 32px;
  padding: clamp(22px, 3.6vw, 34px);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(0, 229, 255, .10), transparent 46%),
    rgba(10, 22, 40, .78);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-cta__copy {
  flex: 1 1 320px;
  min-width: 0;
}

.page-faq .faq-cta__title {
  margin: 8px 0 0;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.32;
  font-weight: 800;
  color: var(--panel);
}

.page-faq .faq-cta__desc {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.76;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-item__a {
    padding-left: 60px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 258px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 74px);
    align-items: start;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: var(--faq-nav-top);
    margin-bottom: 0;
    padding: 20px;
    border: 2px solid var(--line-soft);
    border-radius: var(--radius);
    background: rgba(17, 20, 24, .88);
    box-shadow: var(--shadow-soft);
  }

  .page-faq .faq-nav__title {
    margin-bottom: 14px;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-nav__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-nav__link {
    width: 100%;
    border-color: transparent;
    border-radius: var(--radius-sm);
    background: transparent;
  }

  .page-faq .faq-nav__link[aria-current] {
    border-color: rgba(57, 255, 20, .45);
  }

  .page-faq .faq-item > summary {
    padding: 18px 22px;
  }

  .page-faq .faq-item__a {
    padding: 16px 22px 20px 64px;
  }

  .page-faq .faq-cta__actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 286px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-nav__link,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after {
    transition: none;
  }

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