/* ===== 使用教程页 ===== */
.page-faq {
  --faq-line: rgba(31, 224, 208, 0.22);
  --faq-line-soft: rgba(198, 208, 217, 0.14);
  --faq-panel: rgba(18, 58, 90, 0.55);
  --faq-panel-soft: rgba(18, 58, 90, 0.3);
  --faq-ink: #e6eef4;
  --faq-ink-soft: #a2b6c6;

  position: relative;
  background-color: var(--abyss);
  color: var(--faq-ink);
  overflow-x: clip;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.page-faq figure {
  margin: 0;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(1.75rem, 5vw, 3.5rem));
  padding-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 90% at 88% -10%, rgba(31, 224, 208, 0.16), transparent 62%),
    radial-gradient(80% 70% at 4% 108%, rgba(255, 106, 61, 0.1), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero .wrap {
  position: relative;
}

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

.page-faq .faq-hero__lead h1 {
  margin: 0.8rem 0 1rem;
  font-family: var(--font-sans);
  font-size: clamp(1.95rem, 6.4vw, 3.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead .lede {
  margin: 0 0 1.6rem;
  max-width: 44ch;
  font-size: clamp(1rem, 2.1vw, 1.08rem);
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-faq .faq-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line-soft);
  border: 1px solid var(--faq-line-soft);
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, var(--notch) 100%, 0 calc(100% - var(--notch)));
}

.page-faq .faq-facts li {
  background: rgba(10, 31, 51, 0.9);
  padding: 1.05rem 1.1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-faq .faq-facts__n {
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-facts__t {
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--faq-ink-soft);
}

/* ---------- 分栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-side {
  display: grid;
  gap: 1.5rem;
  align-content: start;
}

/* ---------- 分类树 ---------- */
.page-faq .faq-tree {
  padding: 1.1rem 1.1rem 1.25rem;
  background: var(--faq-panel-soft);
  border: 1px solid var(--faq-line-soft);
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, var(--notch) 100%, 0 calc(100% - var(--notch)));
}

.page-faq .faq-tree__label {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-tree__root,
.page-faq .faq-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-tree__root > li + li {
  margin-top: 0.2rem;
}

.page-faq .faq-tree__sum {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--fog);
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--faq-line-soft);
}

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

.page-faq .faq-tree__sum::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: -3px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform 180ms var(--ease);
}

.page-faq .faq-tree__group[open] > .faq-tree__sum::before {
  transform: rotate(45deg);
  margin-top: 3px;
}

.page-faq .faq-tree__list {
  margin-left: 0.55rem;
  padding: 0.35rem 0 0.3rem 0.85rem;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-tree__link {
  display: block;
  padding: 0.42rem 0.55rem;
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--faq-ink-soft);
  text-decoration: none;
  border-radius: 3px;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-tree__link:hover {
  color: var(--paper);
  background: rgba(31, 224, 208, 0.08);
}

.page-faq .faq-tree__link.is-current {
  color: var(--cyan);
  background: rgba(31, 224, 208, 0.1);
  box-shadow: inset 2px 0 0 var(--coral);
}

.page-faq .faq-side__figure figcaption {
  margin-top: 0.7rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}

/* ---------- 教程卡 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.4rem);
  align-content: start;
}

.page-faq .faq-tut {
  position: relative;
  padding: clamp(1.35rem, 3.2vw, 2.25rem);
  background: linear-gradient(155deg, rgba(18, 58, 90, 0.62) 0%, rgba(10, 31, 51, 0.88) 78%);
  border: 1px solid var(--faq-line-soft);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-faq .faq-tut::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.5rem;
  bottom: 1.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(31, 224, 208, 0));
}

.page-faq .faq-tut--read::before {
  background: linear-gradient(180deg, var(--moss), rgba(79, 124, 91, 0));
}

.page-faq .faq-tut--help::before {
  background: linear-gradient(180deg, var(--coral), rgba(255, 106, 61, 0));
}

.page-faq .faq-tut__meta {
  margin: 0 0 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-tut__head h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-sans);
  font-size: clamp(1.28rem, 3.5vw, 1.8rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-tut__scene {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-tut__k {
  display: inline-block;
  margin-right: 0.45rem;
  padding: 0.1rem 0.5rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--mist);
  background: rgba(79, 124, 91, 0.32);
  border: 1px solid rgba(79, 124, 91, 0.6);
  border-radius: 2px;
}

.page-faq .faq-tut__split {
  display: grid;
  gap: 1.5rem;
}

.page-faq .faq-tut__aside figcaption {
  margin-top: 0.65rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}

/* ---------- 步骤轨 ---------- */
.page-faq .faq-steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 1.5rem;
  bottom: 0.6rem;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(31, 224, 208, 0.8), rgba(31, 224, 208, 0.04));
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0 1rem;
  padding-bottom: 1.35rem;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0.25rem;
}

.page-faq .faq-step__num {
  grid-column: 1;
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(31, 224, 208, 0.5);
  border-radius: 50%;
  background: var(--abyss);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-faq .faq-step__text {
  grid-column: 2;
  margin: 0;
  padding-top: 0.35rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--faq-ink);
}

/* ---------- 结果确认条 ---------- */
.page-faq .faq-confirm {
  margin: 1.5rem 0 0;
  padding: 0.9rem 1.05rem 0.9rem 1.15rem;
  background: rgba(79, 124, 91, 0.2);
  border-left: 3px solid var(--moss);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mist);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-faq .faq-confirm strong {
  font-weight: 700;
  color: var(--paper);
}

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

/* ---------- 栏目阅读清单 ---------- */
.page-faq .faq-read {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-line-soft);
  border: 1px solid var(--faq-line-soft);
}

.page-faq .faq-read li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.15rem 0.9rem;
  padding: 1.1rem 1.15rem 1.2rem;
  background: rgba(10, 31, 51, 0.62);
}

.page-faq .faq-read__n {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 0.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--coral);
}

.page-faq .faq-read__h {
  grid-column: 2;
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-read__p {
  grid-column: 2;
  margin: 0.15rem 0 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

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

/* ---------- 联系块 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 1.25rem;
}

.page-faq .faq-help p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--faq-ink);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-help__list li {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding-bottom: 0.6rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--faq-ink-soft);
  border-bottom: 1px dashed var(--faq-line-soft);
}

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

.page-faq .faq-help__list .mono {
  flex: none;
  min-width: 3.2rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-help .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (max-width: 759.98px) {
  .page-faq .faq-tut__aside {
    max-width: 260px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-faq .faq-tut__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 240px);
    gap: clamp(1.5rem, 3vw, 2.25rem);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 292px) minmax(0, 1fr);
    gap: clamp(2.25rem, 3.6vw, 3.75rem);
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-tut__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  }
}