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

.page-faq {
  --faq-index-w: 236px;
  --faq-hero-top: 128px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: var(--faq-hero-top) 0 var(--hf-space-6);
  color: var(--hf-sand);
  background-color: var(--hf-rock-deep);
  background-image:
    radial-gradient(circle at 16% 8%, rgba(180, 118, 47, .18), transparent 48%),
    repeating-radial-gradient(ellipse 130% 92% at 92% 112%,
      transparent 0 44px,
      rgba(243, 237, 227, .06) 44px 45px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hf-copper), transparent);
  opacity: .55;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--hf-space-5);
  align-items: end;
}

.page-faq .faq-hero .hf-breadcrumb__link {
  color: rgba(243, 237, 227, .7);
  text-decoration: none;
}

.page-faq .faq-hero .hf-breadcrumb__link:hover {
  color: var(--hf-copper-mist);
}

.page-faq .faq-hero .hf-breadcrumb__sep {
  color: rgba(243, 237, 227, .35);
}

.page-faq .faq-hero .hf-breadcrumb__current {
  color: var(--hf-copper-mist);
}

.page-faq .faq-hero__eyebrow {
  margin: var(--hf-space-4) 0 0;
  color: var(--hf-copper-mist);
}

.page-faq .faq-hero__title {
  margin: var(--hf-space-2) 0 0;
  font-weight: 200;
  letter-spacing: -.02em;
  color: var(--hf-sand);
  line-height: 1.02;
}

.page-faq .faq-hero__sub {
  margin: var(--hf-space-2) 0 0;
  font-size: var(--hf-fs-lead);
  font-weight: 300;
  letter-spacing: .01em;
  color: var(--hf-copper-mist);
}

.page-faq .faq-hero__lead {
  margin: var(--hf-space-3) 0 0;
  max-width: 32em;
  color: rgba(243, 237, 227, .82);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hf-space-2);
  margin-top: var(--hf-space-4);
}

.page-faq .faq-hero .hf-btn--ghost {
  color: var(--hf-sand);
  border-color: rgba(243, 237, 227, .38);
}

.page-faq .faq-hero .hf-btn--ghost:hover {
  border-color: var(--hf-copper-mist);
  color: var(--hf-copper-mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid rgba(243, 237, 227, .16);
  border-radius: var(--hf-r-lg);
  background-color: var(--hf-rock);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.82) contrast(1.04);
}

.page-faq .faq-hero__media .hf-media__caption {
  padding: 10px 14px;
  font-size: var(--hf-fs-index);
  letter-spacing: .08em;
  color: rgba(243, 237, 227, .62);
  background-color: rgba(14, 27, 42, .72);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: var(--hf-space-6) 0 var(--hf-space-7);
  background-color: var(--hf-bg);
}

.page-faq .faq-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--hf-space-5);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index__inner {
  position: static;
}

.page-faq .faq-index__label {
  margin: 0 0 var(--hf-space-2);
  color: var(--hf-copper);
  letter-spacing: .18em;
}

.page-faq .faq-index__label--sub {
  margin-top: var(--hf-space-5);
  color: var(--hf-rock-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hf-line);
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0 9px 18px;
  border-bottom: 1px solid var(--hf-line);
  color: var(--hf-fg);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--hf-dur) var(--hf-ease), background-color var(--hf-dur) var(--hf-ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 2px;
  background-color: var(--hf-copper);
  transform: translateY(-50%);
  transition: width var(--hf-dur) var(--hf-ease);
}

.page-faq .faq-index__link:hover {
  color: var(--hf-fg-strong);
  background-color: rgba(232, 201, 160, .3);
}

.page-faq .faq-index__link[aria-current="true"] {
  color: var(--hf-fg-strong);
  font-weight: 600;
}

.page-faq .faq-index__link[aria-current="true"]::before {
  width: 11px;
}

.page-faq .faq-index__link[aria-current="true"] .faq-index__num {
  color: var(--hf-copper);
}

.page-faq .faq-index__num {
  flex: none;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--hf-rock-soft);
  transition: color var(--hf-dur) var(--hf-ease);
}

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

.page-faq .faq-index__count {
  flex: none;
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--hf-ink);
  opacity: .55;
}

.page-faq .faq-index__list--sub .faq-index__link {
  font-size: 13px;
}

/* ---------- 右侧内容 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block {
  margin-bottom: var(--hf-space-7);
}

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

.page-faq .faq-block__head {
  margin-bottom: var(--hf-space-5);
}

.page-faq .faq-block__head .hf-index {
  margin: 0 0 var(--hf-space-2);
  color: var(--hf-copper);
  letter-spacing: .18em;
}

.page-faq .faq-block__head .hf-h2 {
  margin: 0;
  color: var(--hf-fg-strong);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.01em;
}

.page-faq .faq-block__intro {
  margin: var(--hf-space-3) 0 0;
}

/* ---------- 三步查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--hf-space-5);
}

.page-faq .faq-step {
  position: relative;
  padding-right: var(--hf-space-3);
}

.page-faq .faq-step__dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--hf-copper);
  border-radius: 50%;
  background-color: var(--hf-bg);
  color: var(--hf-copper);
  font-size: var(--hf-fs-index-lg);
  letter-spacing: .06em;
  position: relative;
  z-index: 1;
}

.page-faq .faq-step__title {
  margin: var(--hf-space-3) 0 var(--hf-space-2);
  color: var(--hf-fg-strong);
  font-weight: 700;
}

.page-faq .faq-step__text {
  margin: 0;
  max-width: 30em;
  font-size: var(--hf-fs-body-sm);
  line-height: 1.8;
  color: var(--hf-fg);
}

.page-faq .faq-step__tip {
  margin: var(--hf-space-2) 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--hf-fg);
  opacity: .5;
  transition: opacity var(--hf-dur) var(--hf-ease), color var(--hf-dur) var(--hf-ease);
}

.page-faq .faq-step:hover .faq-step__tip,
.page-faq .faq-step:focus-within .faq-step__tip {
  opacity: 1;
  color: var(--hf-copper);
}

/* ---------- 12 类问答分组 ---------- */
.page-faq .faq-groups {
  margin-bottom: var(--hf-space-7);
}

.page-faq .faq-group {
  margin-bottom: var(--hf-space-6);
  scroll-margin-top: 100px;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: var(--hf-space-2);
  border-bottom: 2px solid var(--hf-rock-deep);
}

.page-faq .faq-group__num {
  flex: none;
  font-size: var(--hf-fs-index-lg);
  letter-spacing: .08em;
  color: var(--hf-copper);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-size: var(--hf-fs-h3);
  font-weight: 700;
  line-height: 1.3;
  color: var(--hf-fg-strong);
}

.page-faq .faq-group__count {
  flex: none;
  font-size: var(--hf-fs-index);
  letter-spacing: .04em;
  color: var(--hf-ink);
  opacity: .6;
}

.page-faq .faq-item {
  position: relative;
  margin: 0 calc(var(--hf-space-3) * -1);
  padding: 0 var(--hf-space-3);
  border-bottom: 1px solid var(--hf-line);
  border-radius: var(--hf-r);
  transition: background-color var(--hf-dur) var(--hf-ease);
}

.page-faq .faq-item[open] {
  background-color: var(--hf-sand-alt);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: var(--hf-fs-body-sm);
  font-weight: 500;
  line-height: 1.62;
  color: var(--hf-fg-strong);
  transition: color var(--hf-dur) var(--hf-ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-top: 2px;
  font-family: var(--hf-font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--hf-copper);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "−";
}

.page-faq .faq-item__q:hover {
  color: var(--hf-copper);
}

.page-faq .faq-item__code {
  flex: none;
  padding-top: 3px;
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--hf-rock-soft);
}

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

.page-faq .faq-item__a {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 2px solid var(--hf-copper-mist);
  font-size: var(--hf-fs-body-sm);
  line-height: 1.85;
  color: var(--hf-fg);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 44em;
}

/* ---------- 版本对照 ---------- */
.page-faq .faq-compare {
  border-top: 1px solid var(--hf-rock-deep);
}

.page-faq .faq-compare__head,
.page-faq .faq-compare__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: var(--hf-space-3) 0;
  border-bottom: 1px solid var(--hf-line);
}

.page-faq .faq-compare__head {
  display: none;
}

.page-faq .faq-compare__key {
  font-size: var(--hf-fs-index-lg);
  letter-spacing: .1em;
  color: var(--hf-copper);
  font-family: var(--hf-font-mono);
}

.page-faq .faq-compare__old,
.page-faq .faq-compare__new {
  font-size: var(--hf-fs-body-sm);
  line-height: 1.7;
}

.page-faq .faq-compare__old {
  color: var(--hf-ink);
  opacity: .72;
}

.page-faq .faq-compare__new {
  color: var(--hf-fg-strong);
  font-weight: 500;
}

/* ---------- 按年份找旧版 ---------- */
.page-faq .faq-route {
  display: grid;
  gap: var(--hf-space-5);
}

.page-faq .faq-route__body {
  display: grid;
  gap: var(--hf-space-5);
}

.page-faq .faq-route__item {
  padding-left: var(--hf-space-3);
  border-left: 3px solid var(--hf-copper);
}

.page-faq .faq-route__item .hf-index {
  margin: 0 0 var(--hf-space-2);
  color: var(--hf-rock-soft);
  letter-spacing: .16em;
}

.page-faq .faq-route__item .hf-h3 {
  margin: 0 0 var(--hf-space-2);
  color: var(--hf-fg-strong);
  font-weight: 700;
}

.page-faq .faq-route__item p {
  margin: 0 0 var(--hf-space-3);
  max-width: 34em;
  font-size: var(--hf-fs-body-sm);
  line-height: 1.85;
  color: var(--hf-fg);
}

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

.page-faq .faq-route__media {
  margin: 0;
  border-radius: var(--hf-r-lg);
  overflow: hidden;
}

.page-faq .faq-route__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.86);
}

.page-faq .faq-route__media .hf-media__caption {
  padding: 10px 14px;
  font-size: var(--hf-fs-index);
  letter-spacing: .06em;
  color: var(--hf-ink);
  background-color: var(--hf-sand-alt);
}

/* ---------- 还没找到答案 ---------- */
.page-faq .faq-block--stuck {
  margin-bottom: 0;
}

.page-faq .faq-stuck {
  display: grid;
  gap: var(--hf-space-5);
  padding: var(--hf-space-5) var(--hf-space-4);
  border-radius: var(--hf-r-lg);
  background-color: var(--hf-rock);
  background-image:
    repeating-linear-gradient(135deg,
      rgba(243, 237, 227, .035) 0 12px,
      transparent 12px 24px);
  color: var(--hf-sand);
}

.page-faq .faq-stuck .hf-index {
  margin: 0 0 var(--hf-space-2);
  color: var(--hf-copper-mist);
  letter-spacing: .18em;
}

.page-faq .faq-stuck .hf-h2 {
  margin: 0 0 var(--hf-space-3);
  color: var(--hf-sand);
  font-weight: 700;
  line-height: 1.28;
}

.page-faq .faq-stuck__text p {
  margin: 0 0 var(--hf-space-3);
  max-width: 36em;
  font-size: var(--hf-fs-body-sm);
  line-height: 1.85;
  color: rgba(243, 237, 227, .82);
}

.page-faq .faq-stuck__list {
  list-style: none;
  margin: 0 0 var(--hf-space-4);
  padding: 0;
  border-top: 1px solid rgba(243, 237, 227, .18);
}

.page-faq .faq-stuck__list li {
  position: relative;
  padding: 12px 0 12px 22px;
  border-bottom: 1px solid rgba(243, 237, 227, .18);
  font-size: var(--hf-fs-body-sm);
  line-height: 1.7;
  color: rgba(243, 237, 227, .9);
}

.page-faq .faq-stuck__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 2px;
  background-color: var(--hf-copper);
}

.page-faq .faq-stuck__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hf-space-2);
}

.page-faq .faq-stuck .hf-btn--line {
  color: var(--hf-sand);
  border-color: rgba(243, 237, 227, .4);
}

.page-faq .faq-stuck .hf-btn--line:hover {
  border-color: var(--hf-copper-mist);
  color: var(--hf-copper-mist);
}

.page-faq .faq-stuck__aside .hf-index {
  color: rgba(243, 237, 227, .5);
  letter-spacing: .16em;
}

.page-faq .faq-stuck__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(243, 237, 227, .18);
}

.page-faq .faq-stuck__links li {
  border-bottom: 1px solid rgba(243, 237, 227, .18);
}

.page-faq .faq-stuck__links a {
  display: block;
  padding: 12px 0;
  color: var(--hf-copper-mist);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--hf-dur) var(--hf-ease), padding-left var(--hf-dur) var(--hf-ease);
}

.page-faq .faq-stuck__links a:hover {
  color: var(--hf-sand);
  padding-left: 6px;
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--hf-copper);
  outline-offset: 3px;
  border-radius: var(--hf-r-sm);
}

/* ---------- 窄屏：索引两列压缩 ---------- */
@media (max-width: 599px) {
  .page-faq {
    --faq-hero-top: 104px;
  }

  .page-faq .faq-index__list--cat {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 14px;
  }

  .page-faq .faq-index__list--cat .faq-index__link {
    padding-left: 12px;
    font-size: 13px;
  }

  .page-faq .faq-index__count {
    display: none;
  }

  .page-faq .faq-item {
    margin: 0 -12px;
    padding: 0 12px;
  }

  .page-faq .faq-item__q {
    gap: 8px;
    padding: 15px 0;
  }

  .page-faq .faq-item__code {
    display: none;
  }
}

/* ---------- 中屏 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-compare__head {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--hf-space-3);
    align-items: baseline;
    border-bottom: 1px solid var(--hf-rock-deep);
    font-size: var(--hf-fs-index);
    letter-spacing: .16em;
    color: var(--hf-rock-soft);
    padding-bottom: 10px;
  }

  .page-faq .faq-compare__row {
    grid-template-columns: 116px minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--hf-space-3);
    align-items: baseline;
  }

  .page-faq .faq-compare__key {
    padding-top: 2px;
  }

  .page-faq .faq-route__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：左索引 + 右阅读栏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-body__inner {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: var(--hf-space-6);
  }

  .page-faq .faq-index__inner {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .faq-step {
    padding-right: var(--hf-space-5);
  }

  .page-faq .faq-step:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 48px;
    right: 10px;
    top: 19px;
    border-top: 1px dashed var(--hf-copper-mist);
  }

  .page-faq .faq-route {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: start;
  }

  .page-faq .faq-stuck {
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: var(--hf-space-6);
    padding: var(--hf-space-6) var(--hf-space-5);
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 1200px) {
  .page-faq {
    --faq-index-w: 262px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: var(--hf-space-6);
  }

  .page-faq .faq-item__a {
    padding-left: 22px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}