/* ==========================================================
   问题解答页 · 页面专属样式
   作用域：.page-faq
   ========================================================== */

.page-faq {
  --faq-gap: clamp(16px, 2.4vw, 26px);
  background: var(--paper);
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .crumb a:hover,
.page-faq .crumb a:focus-visible {
  color: var(--zhu);
  border-bottom-color: var(--zhu);
}

.page-faq .crumb [aria-current="page"] {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 40px) 0 clamp(44px, 6.4vw, 82px);
  background: var(--paper);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -30%;
  width: 44%;
  height: 110%;
  background: var(--zhu-pale);
  transform: skewX(-11deg);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero__lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(30px, 5.2vw, 52px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__text {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-faq .faq-hero__aside {
  position: relative;
  padding: clamp(22px, 3.2vw, 32px) clamp(20px, 2.8vw, 30px);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-deep) 84%);
  color: var(--paper);
}

.page-faq .faq-hero__aside::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gold);
}

.page-faq .faq-hero__slug {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .faq-index {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .faq-index__item a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(201, 211, 222, .18);
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper);
  text-decoration: none;
  transition: transform .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

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

.page-faq .faq-index__item:nth-child(1) a { padding-left: 0; }
.page-faq .faq-index__item:nth-child(2) a { padding-left: 8px; }
.page-faq .faq-index__item:nth-child(3) a { padding-left: 16px; }
.page-faq .faq-index__item:nth-child(4) a { padding-left: 24px; }
.page-faq .faq-index__item:nth-child(5) a { padding-left: 32px; }
.page-faq .faq-index__item:nth-child(6) a { padding-left: 40px; }

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  transform: translateX(3px);
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-faq .faq-index__n {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-sec {
  padding: clamp(46px, 6vw, 84px) 0;
}

.page-faq .faq-sec--tint {
  background: var(--cool);
}

.page-faq .faq-sec__head {
  max-width: 720px;
  margin-bottom: clamp(24px, 3.2vw, 42px);
}

.page-faq .faq-sec__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--text);
}

.page-faq .faq-sec__intro {
  margin: 14px 0 0;
  max-width: 38ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 01 三项确认 ---------- */
.page-faq .faq-check {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-check__item {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--cool);
  border-top: 3px solid var(--gold);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-check__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.page-faq .faq-check__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--zhu);
}

.page-faq .faq-check__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-check__text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 02 收藏整理 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

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

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

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 0 0 clamp(16px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .faq-steps__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-steps__text {
  margin: 8px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-note {
  margin-top: clamp(20px, 2.6vw, 28px);
}

/* ---------- 03 问答列表 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--ink-mid);
}

.page-faq .faq-item[open] {
  border-color: var(--gold);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: clamp(15px, 2vw, 19px) clamp(16px, 2.2vw, 22px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  transition: color .16s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

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

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

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--zhu);
  padding-top: 3px;
}

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

.page-faq .faq-item__a {
  border-top: 1px solid var(--line);
  padding: 14px clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 22px);
  animation: faqAnswerIn .22s var(--ease) both;
}

.page-faq .faq-item__a p {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

@keyframes faqAnswerIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 04 多端对照 ---------- */
.page-faq .faq-device {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-device__table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-compare {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14.5px;
  line-height: 1.6;
}

.page-faq .faq-compare thead th {
  padding: 12px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}

.page-faq .faq-compare tbody th,
.page-faq .faq-compare tbody td {
  padding: 13px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.page-faq .faq-compare tbody th {
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.page-faq .faq-compare tbody tr {
  transition: background-color .16s var(--ease);
}

.page-faq .faq-compare tbody tr:hover {
  background: var(--zhu-pale);
}

.page-faq .faq-compare tbody tr:hover th,
.page-faq .faq-compare tbody tr:hover td {
  color: var(--text);
}

.page-faq .faq-device__media .faq-figure {
  max-width: 420px;
}

/* ---------- 05 前后衔接 ---------- */
.page-faq .faq-serve {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-serve__item {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-left-color .2s var(--ease);
}

.page-faq .faq-serve__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-left-color: var(--zhu);
}

.page-faq .faq-serve__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-serve__text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-serve__text a {
  color: var(--zhu);
  text-decoration: none;
  border-bottom: 1px solid var(--zhu-lt);
  transition: border-color .16s var(--ease);
}

.page-faq .faq-serve__text a:hover,
.page-faq .faq-serve__text a:focus-visible {
  border-bottom-color: var(--zhu);
}

/* ---------- 06 人工对接 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4vw, 50px);
  background: var(--zhu);
  color: #FFFFFF;
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 230px;
  height: 230px;
  border: 1px solid rgba(255, 255, 255, .24);
  transform: rotate(18deg);
  pointer-events: none;
}

.page-faq .faq-help__lead {
  position: relative;
  z-index: 1;
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -.015em;
  color: #FFFFFF;
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 34ch;
  font-size: 16px;
  line-height: 1.76;
  color: rgba(255, 255, 255, .88);
}

.page-faq .eyebrow--light {
  color: rgba(255, 255, 255, .8);
}

.page-faq .eyebrow--light .eyebrow__num {
  color: #FFFFFF;
}

.page-faq .faq-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: clamp(20px, 2.6vw, 28px);
  padding: 12px 24px;
  border: 1px solid rgba(255, 255, 255, .72);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-cta:hover,
.page-faq .faq-cta:focus-visible {
  background: #FFFFFF;
  color: var(--zhu);
}

.page-faq .faq-help__list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-help__item {
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .26);
}

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

.page-faq .faq-help__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .74);
  margin-bottom: 5px;
}

.page-faq .faq-help__val {
  display: block;
  font-size: 15.5px;
  line-height: 1.7;
  color: #FFFFFF;
  word-break: break-word;
}

.page-faq .faq-tail {
  margin: clamp(22px, 2.8vw, 32px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-tail a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color .16s var(--ease);
}

.page-faq .faq-tail a:hover,
.page-faq .faq-tail a:focus-visible {
  color: var(--zhu);
}

/* ---------- 响应式 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-check {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-hero__aside {
    margin-top: clamp(14px, 2vw, 28px);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.28fr);
    align-items: start;
  }

  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px clamp(16px, 2.4vw, 28px);
    align-items: start;
  }

  .page-faq .faq-item:nth-child(even) {
    margin-top: clamp(18px, 2.6vw, 36px);
  }

  .page-faq .faq-device {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.86fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-compare {
    font-size: 15px;
  }

  .page-faq .faq-compare tbody th,
  .page-faq .faq-compare tbody td {
    padding: 15px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-check__item,
  .page-faq .faq-serve__item,
  .page-faq .faq-index__item a {
    transition: none;
  }

  .page-faq .faq-check__item:hover,
  .page-faq .faq-serve__item:hover,
  .page-faq .faq-index__item a:hover {
    transform: none;
  }
}