.page-faq {
  --faq-line: rgba(47, 211, 224, 0.22);
  --faq-line-soft: rgba(47, 211, 224, 0.1);
  --faq-tint: rgba(12, 43, 71, 0.62);
  --faq-pad: clamp(2.5rem, 6vw, 5rem);
  color: var(--mist);
}

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

/* 面包屑 */
.page-faq .tut-crumb {
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.page-faq .tut-crumb__sep {
  color: var(--muted);
  margin: 0 0.45rem;
}

/* 首屏 */
.page-faq .tut-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(2.4rem, 6vw, 4rem);
  background:
    radial-gradient(95% 130% at 86% -12%, rgba(18, 62, 92, 0.9), rgba(6, 26, 46, 0) 64%),
    linear-gradient(158deg, var(--grad-a) 0%, var(--grad-b) 54%, var(--ink) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .tut-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(48vw, 430px);
  height: 1px;
  background: linear-gradient(90deg, rgba(47, 211, 224, 0), var(--cyan));
  opacity: 0.55;
}

.page-faq .tut-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .tut-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0.6rem 0 0;
  max-width: 19ch;
}

.page-faq .tut-hero__lede {
  margin-top: clamp(1rem, 2.4vw, 1.5rem);
  color: var(--mist);
}

.page-faq .tut-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-faq .tut-hero__meta {
  padding: clamp(1.2rem, 3vw, 1.7rem);
  background: linear-gradient(170deg, rgba(12, 43, 71, 0.94), rgba(6, 26, 46, 0.74));
}

.page-faq .meta-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .meta-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .meta-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .meta-list__num {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3vw, 1.45rem);
  color: var(--signal);
  letter-spacing: -0.01em;
}

.page-faq .meta-list__label {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: right;
}

/* 章节通用 */
.page-faq .tut-index,
.page-faq .tut-cats,
.page-faq .tut-steps,
.page-faq .tut-desktop,
.page-faq .tut-archive,
.page-faq .tut-safety,
.page-faq .tut-help {
  padding: var(--faq-pad) 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .tut-help {
  border-bottom: 0;
}

.page-faq .sec-head {
  display: grid;
  gap: clamp(0.7rem, 2vw, 1.6rem);
  margin-bottom: clamp(1.5rem, 4vw, 2.6rem);
}

.page-faq .sec-head .bignum {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 7vw, 4.1rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-faq .sec-head__body h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.28;
  margin: 0.35rem 0 0.7rem;
}

.page-faq .sub-title {
  font-family: var(--font-head);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  font-weight: 700;
  margin: 0 0 0.8rem;
  color: var(--mist);
}

/* 01 索引 */
.page-faq .tut-index__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .cat-tab {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num head"
    "num desc";
  gap: 0.25rem 0.95rem;
  align-items: center;
  padding: 1.05rem 1.15rem 1.15rem;
  clip-path: var(--cut-corners);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 43, 71, 0.86), rgba(6, 26, 46, 0.93));
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .cat-tab__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  line-height: 1;
  color: var(--cyan);
  transition: color 0.25s var(--ease);
}

.page-faq .cat-tab__head {
  grid-area: head;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.page-faq .cat-tab__name {
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .cat-tab__count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--signal);
}

.page-faq .cat-tab__desc {
  grid-area: desc;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.page-faq .cat-tab:hover,
.page-faq .cat-tab:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(18, 62, 92, 0.96), rgba(6, 26, 46, 0.96));
}

.page-faq .cat-tab:hover .cat-tab__num,
.page-faq .cat-tab:focus-visible .cat-tab__num {
  color: var(--signal);
}

/* 02 分类问答 */
.page-faq .faq-cat {
  padding-top: clamp(1.5rem, 3.4vw, 2.2rem);
  scroll-margin-top: 6rem;
}

.page-faq .faq-cat:first-of-type {
  padding-top: 0;
}

.page-faq .faq-cat__title {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 0.9rem;
  padding-left: 0.8rem;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-head);
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-faq .faq-cat__title span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--muted);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.6rem;
  max-width: 62rem;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line-soft);
  border-left: 2px solid transparent;
  background: var(--faq-tint);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--signal);
  background: rgba(12, 43, 71, 0.86);
}

.page-faq .faq-item > summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--mist);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--cyan);
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(45deg);
  color: var(--signal);
}

.page-faq .faq-item .disclosure__body {
  padding: 0 1.1rem 1.05rem;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.78;
}

.page-faq .faq-item .disclosure__body p {
  margin: 0;
}

.page-faq .faq-item .disclosure__body a,
.page-faq .path-card a,
.page-faq .tut-help__more a,
.page-faq .safety-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-item .disclosure__body a:hover,
.page-faq .path-card a:hover,
.page-faq .tut-help__more a:hover,
.page-faq .safety-note a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

/* 03 六步图解 */
.page-faq .tut-steps__figure {
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
}

.page-faq .step-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
}

.page-faq .step-jump__label {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-right: 0.3rem;
}

.page-faq .step-jump a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.3rem 0.62rem;
  border: 1px solid var(--line);
  color: var(--cyan);
  text-decoration: none;
  transition: background 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .step-jump a:hover,
.page-faq .step-jump a:focus-visible {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
}

.page-faq .tut-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.9rem, 2.6vw, 1.7rem);
  padding: clamp(1.1rem, 2.8vw, 1.7rem) 0;
  border-top: 1px dashed var(--faq-line);
  scroll-margin-top: 6rem;
}

.page-faq .step:last-child {
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.6vw, 2rem);
  line-height: 1;
  color: var(--signal);
  letter-spacing: -0.02em;
}

.page-faq .step__title {
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  font-weight: 700;
  margin: 0 0 0.45rem;
}

.page-faq .step__body p {
  margin: 0 0 0.55rem;
  font-size: 0.96rem;
  line-height: 1.78;
}

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

.page-faq .step__hint {
  border-left: 2px solid var(--cyan);
  background: rgba(47, 211, 224, 0.07);
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--mist);
}

/* 04 电脑端 */
.page-faq .tut-desktop__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .tut-desktop__figure {
  margin: 0;
}

.page-faq .spec-list {
  list-style: none;
  margin: 0 0 clamp(1.4rem, 3vw, 2rem);
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .spec-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.72rem 0.95rem;
  clip-path: var(--cut-corners);
  border: 1px solid var(--faq-line-soft);
  background: var(--faq-tint);
  font-size: 0.94rem;
  line-height: 1.72;
}

.page-faq .spec-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 0.6rem;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-faq .spec-list--steps li::before {
  background: var(--signal);
  border-radius: 50%;
  transform: none;
}

/* 05 旧版本资料查找 */
.page-faq .path-grid {
  display: grid;
  gap: 0.9rem;
}

.page-faq .path-card {
  padding: 1.1rem 1.2rem 1.25rem;
  clip-path: var(--cut-corners);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 43, 71, 0.82), rgba(6, 26, 46, 0.92));
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .path-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-faq .path-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-faq .path-card h3 {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .path-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--mist);
}

/* 06 账号与安全 */
.page-faq .safety-three {
  list-style: none;
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-faq .safety-three li {
  padding: 1rem 1.1rem 1.1rem;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: var(--faq-tint);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-faq .safety-three b {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--signal);
  letter-spacing: 0.14em;
}

.page-faq .safety-note {
  margin: 0;
  max-width: 62rem;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.85;
}

/* 07 联系收束 */
.page-faq .tut-help__card {
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 160% at 100% 0%, rgba(18, 62, 92, 0.95), rgba(6, 26, 46, 0.92) 72%);
}

.page-faq .tut-help__grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.2rem);
}

.page-faq .tut-help__body h2 {
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  font-weight: 800;
  line-height: 1.3;
  margin: 0.4rem 0 0.8rem;
}

.page-faq .tut-help__more {
  margin: 1rem 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-faq .contact-list li {
  padding: 0.75rem 0.95rem;
  border-left: 2px solid var(--cyan);
  background: rgba(6, 26, 46, 0.55);
}

.page-faq .contact-list strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .contact-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--signal);
  word-break: break-all;
  line-height: 1.55;
}

/* 响应式 */
@media (min-width: 700px) {
  .page-faq .tut-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-faq .sec-head {
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 860px) {
  .page-faq .tut-desktop__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 3fr);
  }

  .page-faq .tut-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 3fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .tut-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: none;
  }

  .page-faq .path-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
  }

  .page-faq .cat-tab:hover,
  .page-faq .path-card:hover {
    transform: none;
  }
}