.page-faq {
  --faq-space: clamp(44px, 6vw, 88px);
  background: var(--ink);
  color: var(--graphite);
  padding: 0;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(22, 217, 227, 0.16) 0%, rgba(22, 217, 227, 0) 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(245, 166, 35, 0.13) 0%, rgba(245, 166, 35, 0) 62%),
    var(--ink);
  color: var(--cream);
  padding: clamp(84px, 10vw, 132px) 0 clamp(40px, 6vw, 76px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  max-width: 20ch;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-faq .faq-hero__intro {
  margin: 0 0 28px;
  max-width: 48ch;
  color: rgba(247, 241, 227, 0.78);
  font-size: clamp(0.96rem, 1.6vw, 1.08rem);
  line-height: 1.78;
}

.page-faq .faq-search {
  max-width: 560px;
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}

.page-faq .faq-search__box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px;
  background: var(--paper);
  border-radius: var(--radius-md);
  box-shadow: 0 26px 60px -42px rgba(0, 0, 0, 0.9);
  transition: box-shadow 0.2s var(--ease);
}

.page-faq .faq-search__box:focus-within {
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.72), 0 26px 60px -42px rgba(0, 0, 0, 0.9);
}

.page-faq .faq-search__input {
  width: 100%;
  min-width: 0;
  padding: 12px 14px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--graphite);
  font-family: var(--sans);
  font-size: 1rem;
}

.page-faq .faq-search__input:focus {
  outline: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--slate);
}

.page-faq .faq-search__go {
  justify-content: center;
}

.page-faq .faq-search__hint {
  margin: 12px 0 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: rgba(247, 241, 227, 0.6);
}

.page-faq .faq-hero__figure {
  margin: 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
}

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

.page-faq .media-frame__caption {
  margin: 0;
  padding: 10px 14px 12px;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: rgba(247, 241, 227, 0.62);
}

/* ---------- 奶油画板 ---------- */
.page-faq .faq-board {
  background: var(--cream);
  border-radius: clamp(24px, 4vw, 40px) clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(36px, 6vw, 72px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-board > .shell + .shell {
  margin-top: var(--faq-space);
}

.page-faq .faq-h2 {
  margin: 0 0 12px;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-h2--on-dark {
  color: var(--cream);
}

.page-faq .faq-sub {
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 64ch;
  color: var(--slate);
  font-size: clamp(0.94rem, 1.5vw, 1.04rem);
  line-height: 1.78;
}

/* ---------- 标签墙 ---------- */
.page-faq .faq-tagwall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-tagpill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px 11px 14px;
  border: 1px solid rgba(22, 217, 227, 0.55);
  border-radius: var(--radius-pill);
  background: rgba(22, 217, 227, 0.09);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-tagpill .t-mono {
  font-size: 0.7rem;
  color: var(--vermilion);
  letter-spacing: 0.06em;
}

.page-faq .faq-tagpill:hover,
.page-faq .faq-tagpill:focus-visible {
  background: rgba(22, 217, 227, 0.22);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 索引区布局 ---------- */
.page-faq .faq-index__layout {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-rail {
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-rail .rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail .rail-link {
  display: block;
  padding: 5px 0;
  border-bottom: 1px solid transparent;
  color: var(--slate);
  font-size: 0.9rem;
  text-decoration: none;
}

.page-faq .faq-rail .rail-link:hover {
  color: var(--ink);
}

.page-faq .faq-rail .rail-link.is-active {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--amber);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(22, 217, 227, 0.72);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-item__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -4px;
}

.page-faq .faq-item[open] .faq-item__summary {
  background: rgba(159, 243, 242, 0.18);
}

.page-faq .faq-item__no {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--vermilion);
}

.page-faq .faq-item__q {
  flex: 1 1 60%;
  min-width: 0;
  font-size: clamp(0.97rem, 1.8vw, 1.05rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__summary::after {
  content: "\2212";
  color: var(--vermilion);
}

.page-faq .faq-item__body {
  padding: 14px 18px 20px;
  border-top: 1px solid var(--line-light);
  color: var(--graphite);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-item__body ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

.page-faq .faq-item__body li {
  margin-bottom: 6px;
}

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

/* ---------- 排查路径 ---------- */
.page-faq .faq-path__panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: clamp(20px, 3vw, 32px);
  background: linear-gradient(155deg, var(--panel) 0%, var(--ink) 66%), var(--panel);
  color: var(--cream);
  overflow: hidden;
}

.page-faq .faq-path__sub {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 60ch;
  color: rgba(247, 241, 227, 0.72);
  font-size: 0.95rem;
  line-height: 1.78;
}

.page-faq .faq-path__steps {
  display: grid;
  gap: 14px;
  margin: 0 0 clamp(24px, 4vw, 38px);
  padding: 0;
  list-style: none;
}

.page-faq .faq-path__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 20px 22px;
  background: rgba(255, 253, 247, 0.05);
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius-md);
}

.page-faq .faq-path__card:nth-child(2) {
  border-top-color: var(--amber);
}

.page-faq .faq-path__card:nth-child(3) {
  border-top-color: var(--vermilion);
}

.page-faq .faq-path__num {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-path__card:nth-child(2) .faq-path__num {
  color: var(--amber);
}

.page-faq .faq-path__card:nth-child(3) .faq-path__num {
  color: var(--vermilion);
}

.page-faq .faq-path__card h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-faq .faq-path__row {
  display: flex;
  gap: 10px;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: rgba(247, 241, 227, 0.76);
}

.page-faq .faq-path__tag {
  flex: 0 0 auto;
  height: fit-content;
  padding: 2px 9px;
  border-radius: var(--radius-pill);
  background: var(--cyan-soft);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.page-faq .faq-path__card:nth-child(2) .faq-path__tag {
  background: var(--amber-soft);
}

.page-faq .faq-path__figure {
  margin: 0;
  overflow: hidden;
  background: rgba(11, 27, 43, 0.55);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
}

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

/* ---------- 版本差异 ---------- */
.page-faq .faq-version__inner {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(24px, 4vw, 44px);
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-left: 6px solid var(--amber);
  border-radius: var(--radius-md);
}

.page-faq .faq-version__inner .faq-sub {
  margin-bottom: 16px;
}

.page-faq .faq-version__list {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-version__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--graphite);
}

.page-faq .faq-version__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
}

.page-faq .faq-version__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-version__aside {
  padding: 20px;
  background: var(--ink);
  border-radius: var(--radius-sm);
  color: var(--cream);
  font-size: 0.88rem;
  line-height: 1.75;
}

.page-faq .faq-version__aside-title {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-version__aside ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: rgba(247, 241, 227, 0.8);
}

.page-faq .faq-version__aside li + li {
  margin-top: 8px;
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-support__grid {
  display: grid;
  gap: 12px;
  margin: 0 0 18px;
}

.page-faq .faq-support__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 18px 20px;
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
}

.page-faq .faq-support__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-support__value {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-support__meta {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--slate);
}

.page-faq .faq-support__links {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-support__links a {
  color: var(--vermilion);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-support__links a:hover {
  color: var(--ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-search__box {
    flex-direction: row;
    align-items: center;
    border-radius: var(--radius-pill);
  }

  .page-faq .faq-search__go {
    flex: 0 0 auto;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
  }

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

  .page-faq .faq-version__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index__layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .faq-rail .rail-list {
    flex-direction: column;
    gap: 2px;
  }
}

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

  .page-faq .faq-tagpill:hover,
  .page-faq .faq-tagpill:focus-visible {
    transform: none;
  }
}