.page-faq {
  --faq-rule: rgba(195, 201, 198, 0.24);
  --faq-rule-strong: rgba(195, 201, 198, 0.46);
  --faq-gap: clamp(1.75rem, 4vw, 3rem);
  --faq-panel: rgba(14, 42, 34, 0.55);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(1.25rem, 3.5vw, 2.5rem) 0 clamp(1rem, 2.5vw, 1.75rem);
}

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0.6rem 0 1rem;
  color: var(--paper);
  max-width: 18ch;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  font-size: clamp(0.98rem, 1.6vw, 1.12rem);
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-index a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.4;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--faq-rule);
  color: var(--gray);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--cyan);
  border-color: rgba(63, 224, 200, 0.55);
  background-color: rgba(63, 224, 200, 0.08);
  outline: none;
}

/* ---------- 分类入口 ---------- */

.page-faq .faq-clusters {
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
  color: var(--paper);
}

.page-faq .faq-cluster-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-faq .cluster {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.1rem 1.2rem 1.4rem;
  border: 1px solid var(--faq-rule);
  background: linear-gradient(180deg, rgba(14, 42, 34, 0.9), rgba(13, 18, 16, 0.62));
  color: var(--paper);
  text-decoration: none;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .cluster::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: var(--cyan);
  transition: width 0.4s var(--ease);
}

.page-faq .cluster:hover,
.page-faq .cluster:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(63, 224, 200, 0.5);
  outline: none;
}

.page-faq .cluster:hover::after,
.page-faq .cluster:focus-visible::after {
  width: 100%;
}

.page-faq .cluster__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .cluster__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  letter-spacing: -0.01em;
}

.page-faq .cluster__note {
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--gray);
}

@media (min-width: 760px) {
  .page-faq .faq-cluster-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-faq .cluster--a { grid-column: span 7; }
  .page-faq .cluster--b { grid-column: span 5; padding-top: 1.5rem; }
  .page-faq .cluster--c { grid-column: span 4; }
  .page-faq .cluster--d { grid-column: span 8; padding-bottom: 1.8rem; }
}

/* ---------- 主栏 + 侧栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 286px;
    align-items: start;
  }
}

.page-faq .faq-group,
.page-faq .faq-feature,
.page-faq .faq-glossary,
.page-faq .faq-contact {
  scroll-margin-top: 7rem;
}

.page-faq .faq-group,
.page-faq .faq-feature,
.page-faq .faq-glossary {
  margin-bottom: var(--faq-gap);
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  background: var(--faq-panel);
  border: 1px solid var(--faq-rule);
  padding: clamp(1.1rem, 3vw, 1.85rem);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.9rem;
  margin-bottom: 1.1rem;
}

.page-faq .faq-group__num {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  width: 100%;
  margin: 0;
  max-width: 54ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .question-list {
  border-top: 2px solid var(--faq-rule-strong);
}

.page-faq .question {
  border-bottom: 2px solid var(--faq-rule);
}

.page-faq .question:last-child {
  border-bottom: none;
}

.page-faq .question__head {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.05rem 0.4rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

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

.page-faq .question__head:hover {
  background-color: rgba(63, 224, 200, 0.06);
}

.page-faq .question__num {
  flex: 0 0 auto;
  font-size: 0.72rem;
  line-height: 1.95;
  color: var(--cyan);
}

.page-faq .question__text {
  font-size: clamp(0.97rem, 1.7vw, 1.06rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .question[open] {
  background-color: var(--paper-hi);
  box-shadow: inset 4px 0 0 var(--orange);
}

.page-faq .question[open] .question__head {
  padding-left: 1.1rem;
  background-color: transparent;
}

.page-faq .question[open] .question__text {
  color: var(--brown);
}

.page-faq .question[open] .question__num {
  color: var(--rust);
}

.page-faq .question__body {
  padding: 0.1rem 1.1rem 1.3rem 2.15rem;
  max-width: 64ch;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--brown);
}

.page-faq .question__body p {
  margin: 0 0 0.6rem;
}

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

.page-faq .question__body a {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 平台选择 ---------- */

.page-faq .faq-feature__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: center;
}

@media (min-width: 880px) {
  .page-faq .faq-feature__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }
}

.page-faq .faq-feature__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0.4rem 0 0.9rem;
  color: var(--paper);
}

.page-faq .faq-feature__lead {
  max-width: 48ch;
  margin: 0 0 1rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--gray);
}

.page-faq .pick-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .pick-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed var(--faq-rule);
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .pick-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-faq .pick-list .mono {
  font-size: 0.72rem;
  line-height: 2.1;
  color: var(--orange);
}

.page-faq .pick-list strong {
  display: block;
  color: var(--paper);
  font-weight: 700;
}

.page-faq .faq-feature__media {
  margin: 0;
  border: 1px solid var(--faq-rule);
  background: rgba(14, 42, 34, 0.45);
  overflow: hidden;
}

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

.page-faq .faq-feature__caption {
  padding: 0.75rem 0.9rem 0.9rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--gray);
  border-top: 1px solid var(--faq-rule);
}

/* ---------- 术语速查 ---------- */

.page-faq .faq-glossary__band {
  position: relative;
  border: 1px solid var(--faq-rule);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

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

.page-faq .faq-glossary__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 18, 16, 0.35), rgba(13, 18, 16, 0.9));
  pointer-events: none;
}

.page-faq .faq-glossary__lead {
  max-width: 46ch;
  margin: -0.4rem 0 1.1rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .glossary {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.page-faq .glossary th,
.page-faq .glossary td {
  text-align: left;
  vertical-align: top;
  padding: 0.85rem 0.7rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .glossary thead th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--silver);
  border-bottom: 2px solid var(--faq-rule-strong);
}

.page-faq .glossary tbody th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.82rem;
  color: var(--cyan);
  width: 34%;
}

.page-faq .glossary tbody td {
  color: var(--gray);
  line-height: 1.75;
}

.page-faq .glossary tbody tr:hover td,
.page-faq .glossary tbody tr:hover th {
  background-color: rgba(63, 224, 200, 0.05);
}

.page-faq .glossary tbody tr:hover td {
  color: var(--paper);
}

/* ---------- 联系客服 ---------- */

.page-faq .faq-contact {
  background: var(--paper);
  color: var(--brown);
  border: 1px solid var(--brown);
  box-shadow: 8px 8px 0 rgba(36, 28, 24, 0.55);
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

.page-faq .faq-contact__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.85rem;
  color: var(--brown);
}

.page-faq .faq-contact p {
  max-width: 58ch;
  margin: 0 0 1.1rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--brown);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0 0 1.15rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 0.7rem 0;
  border-top: 1px solid rgba(36, 28, 24, 0.18);
}

.page-faq .faq-contact__list li:last-child {
  border-bottom: 1px solid rgba(36, 28, 24, 0.18);
}

.page-faq .faq-contact__key {
  flex: 0 0 auto;
  min-width: 5.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--rust);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--brown);
  text-decoration: none;
  word-break: break-word;
}

.page-faq a.faq-contact__val {
  border-bottom: 2px solid rgba(216, 69, 28, 0.5);
  transition: border-color var(--dur) var(--ease);
}

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

.page-faq .faq-contact__note {
  margin-bottom: 0;
  font-size: 0.85rem;
  color: rgba(36, 28, 24, 0.78);
}

.page-faq .faq-contact__note a {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 侧栏快捷入口 ---------- */

.page-faq .faq-aside__box {
  border: 1px solid var(--faq-rule);
  background: rgba(14, 42, 34, 0.6);
  padding: 1.15rem 1.2rem 1.35rem;
}

.page-faq .faq-aside__list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-aside__list a {
  display: block;
  padding: 0.55rem 0.6rem;
  font-size: 0.87rem;
  line-height: 1.6;
  color: var(--gray);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-aside__list a:hover,
.page-faq .faq-aside__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background-color: rgba(63, 224, 200, 0.06);
  outline: none;
}

.page-faq .faq-aside__list a[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--orange);
  background-color: rgba(63, 224, 200, 0.09);
}

@media (min-width: 1000px) {
  .page-faq .faq-aside {
    position: sticky;
    top: 6.5rem;
  }
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 560px) {
  .page-faq .question__body {
    padding-left: 1.1rem;
    padding-right: 0.9rem;
  }
  .page-faq .faq-contact {
    box-shadow: 5px 5px 0 rgba(36, 28, 24, 0.5);
  }
  .page-faq .glossary tbody th {
    width: 40%;
  }
  .page-faq .faq-index a {
    font-size: 0.72rem;
    padding: 0.45rem 0.7rem;
  }
}