/* ===== 帮助中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-pad: clamp(44px, 6.2vw, 92px);
  --faq-gap: clamp(24px, 3.4vw, 44px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--c-mist) 0%, var(--c-snow) 74%);
  border-bottom: 2px solid var(--c-deep);
  padding-block: clamp(26px, 4.6vw, 52px) clamp(52px, 7.4vw, 96px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: repeating-linear-gradient(
    90deg,
    var(--c-primary) 0 76px,
    var(--c-gold) 76px 96px,
    var(--c-mid) 96px 116px
  );
  opacity: 0.85;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

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

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-size: clamp(30px, 5.6vw, 58px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-deep);
  max-width: 17ch;
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--c-ink);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-faq .faq-hero__facts {
  background: var(--c-primary);
  color: var(--c-snow);
  border: 2px solid var(--c-deep);
  box-shadow: var(--shadow-hard);
  padding: 22px 22px 14px;
  min-width: 0;
}

.page-faq .faq-hero__facts-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold-lt);
}

.page-faq .faq-facts {
  margin: 0;
  padding: 0;
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(251, 250, 247, 0.22);
}

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

.page-faq .faq-fact dt {
  font-size: 13.5px;
  color: rgba(251, 250, 247, 0.78);
  white-space: nowrap;
}

.page-faq .faq-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--c-gold-lt);
  text-align: right;
}

/* ---------- 三步对照 ---------- */
.page-faq .faq-steps {
  padding-block: var(--faq-pad);
  background: var(--c-snow);
}

.page-faq .faq-steps__head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-faq .faq-steps__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--c-deep);
}

.page-faq .faq-steps__lead {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-stone);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(30px, 4.6vw, 56px);
  border: 2px solid var(--c-deep);
  background: var(--c-mist);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-faq .faq-figure .media__inner {
  aspect-ratio: 2 / 1;
  overflow: hidden;
}

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

.page-faq .faq-figure .media__caption {
  padding: 10px 16px;
  border-top: 2px solid var(--c-deep);
  background: var(--c-snow);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--c-stone);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--c-deep);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 8px 18px;
  padding: 26px 0;
  border-bottom: var(--line-hair);
}

.page-faq .faq-step__num {
  grid-row: 1 / span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--c-deep);
  background: var(--c-gold-lt);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .faq-step__title {
  margin: 4px 0 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--c-deep);
}

.page-faq .faq-step__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-stone);
}

/* ---------- 问答库 ---------- */
.page-faq .faq-library {
  padding-block: var(--faq-pad);
  background: var(--c-snow);
  border-top: 2px solid var(--c-deep);
}

.page-faq .faq-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

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

.page-faq .faq-tools__title {
  margin: 14px 0 0;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.012em;
  color: var(--c-deep);
}

.page-faq .faq-tools__text {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-stone);
}

.page-faq .faq-tools .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-tools__media {
  margin: 0;
  border: 2px solid var(--c-deep);
  background: var(--c-mist);
  overflow: hidden;
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(38px, 5vw, 66px);
  margin-top: clamp(40px, 5.4vw, 72px);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-deep);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-deep);
  background: var(--c-gold-lt);
  border: 1px solid var(--c-deep);
  padding: 3px 8px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-deep);
}

.page-faq .faq-group__note {
  margin: 14px 0 18px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-stone);
}

/* ---------- 折叠问答条目 ---------- */
.page-faq .faq-item {
  border: 2px solid var(--c-deep);
  border-left-width: 6px;
  border-left-color: var(--c-mist);
  background: var(--c-snow);
  margin-top: 12px;
  transition: border-left-color 0.22s ease, box-shadow 0.24s ease;
}

.page-faq .faq-item:hover {
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-gold);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-deep);
}

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

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

.page-faq .faq-item__chev {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--c-primary);
  border-bottom: 2px solid var(--c-primary);
  transform: rotate(45deg);
  transition: transform 0.22s ease;
}

.page-faq .faq-item[open] .faq-item__chev {
  transform: rotate(225deg);
}

.page-faq .faq-item__a {
  padding: 0 20px 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-faq .faq-item__a > p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-item__a a {
  color: var(--c-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--c-gold);
  text-decoration: none;
}

.page-faq .faq-item__a a:hover {
  color: var(--c-deep);
  background: var(--c-gold-lt);
}

.page-faq .faq-item__ol {
  list-style: none;
  counter-reset: faqstep;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-item__ol li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 32px;
  margin-bottom: 9px;
  color: var(--c-stone);
}

.page-faq .faq-item__ol li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__ol li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 2px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-deep);
  background: var(--c-gold-lt);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

/* ---------- 人工帮助 ---------- */
.page-faq .faq-help {
  padding-block: var(--faq-pad);
  background: var(--c-deep);
  border-top: 2px solid var(--c-deep);
  color: var(--c-snow);
}

.page-faq .faq-help__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-help .eyebrow {
  color: var(--c-gold-lt);
}

.page-faq .faq-help__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1.26;
  letter-spacing: -0.015em;
  color: var(--c-snow);
}

.page-faq .faq-help__text {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(251, 250, 247, 0.8);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid rgba(251, 250, 247, 0.22);
}

.page-faq .faq-help__list li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-bottom: 1px solid rgba(251, 250, 247, 0.22);
  font-size: 15.5px;
  line-height: 1.7;
  color: rgba(251, 250, 247, 0.9);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 11px;
  height: 6px;
  border-left: 2px solid var(--c-gold);
  border-bottom: 2px solid var(--c-gold);
  transform: rotate(-45deg);
}

.page-faq .faq-help .btn {
  margin-top: 26px;
}

.page-faq .faq-help__side {
  border: 2px solid rgba(251, 250, 247, 0.28);
  background: rgba(251, 250, 247, 0.05);
  padding: 22px 22px 24px;
  min-width: 0;
}

.page-faq .faq-help__label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold-lt);
}

.page-faq .faq-help__big {
  margin: 0;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 600;
  color: var(--c-snow);
}

.page-faq .faq-help__meta {
  margin: 6px 0 20px;
  font-size: 14px;
  color: rgba(251, 250, 247, 0.72);
}

.page-faq .faq-help__value {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--c-snow);
  word-break: break-word;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-groups {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.34fr) minmax(280px, 0.82fr);
    gap: clamp(32px, 4.6vw, 64px);
  }

  .page-faq .faq-tools {
    grid-template-columns: minmax(0, 1.06fr) minmax(260px, 0.94fr);
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.32fr) minmax(260px, 0.86fr);
    gap: clamp(32px, 4.6vw, 64px);
  }
}

@media (min-width: 920px) {
  .page-faq .faq-steps__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(20px, 2.4vw, 32px);
    border-top: 0;
    padding-bottom: 62px;
    align-items: start;
  }

  .page-faq .faq-step {
    display: block;
    border: 2px solid var(--c-deep);
    background: var(--c-snow);
    box-shadow: var(--shadow-hard);
    padding: 24px 22px 26px;
    transition: transform 0.24s ease, box-shadow 0.24s ease;
  }

  .page-faq .faq-step:hover {
    transform: translateY(-2px);
  }

  .page-faq .faq-step:nth-child(2) {
    margin-top: 28px;
  }

  .page-faq .faq-step:nth-child(3) {
    margin-top: 56px;
  }

  .page-faq .faq-step__num {
    display: inline-flex;
    margin-bottom: 16px;
  }

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

@media (max-width: 479px) {
  .page-faq .faq-tools .filter-bar {
    gap: 6px;
  }

  .page-faq .faq-item__q {
    padding: 15px 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 15px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__chev,
  .page-faq .faq-step {
    transition: none;
  }

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