/* ===== 使用教程页 · 手册式双栏 ===== */

.page-faq {
  background-color: var(--navy);
  color: var(--mist);
  font-family: var(--font-body);
  padding-bottom: 84px;
}

.page-faq [data-reveal] {
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

/* ---- 面包屑 ---- */
.page-faq .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(215, 225, 234, .62);
}
.page-faq .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}
.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  text-decoration: underline;
  outline: none;
}
.page-faq .crumbs__sep {
  margin: 0 8px;
  color: var(--rock);
}

/* ---- 封面带 ---- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 42px;
  border-bottom: 1px solid var(--line-soft);
  background-image:
    radial-gradient(860px 320px at 84% -30%, rgba(0, 229, 199, .14), transparent 72%),
    radial-gradient(600px 260px at 6% 110%, rgba(255, 122, 69, .10), transparent 70%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  background-position: center, center, center, center;
}

.page-faq .faq-hero__eyebrow {
  margin: 30px 0 14px;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: 0 0 32px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  overflow: hidden;
}

.page-faq .faq-stat {
  background: var(--navy-deep);
  padding: 15px 18px;
}

.page-faq .faq-stat__v {
  display: block;
  font-size: 21px;
  letter-spacing: .02em;
  color: var(--cyan);
  line-height: 1.2;
}

.page-faq .faq-stat__k {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.4;
  color: rgba(215, 225, 234, .68);
}

/* ---- 双栏骨架 ---- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-top: 40px;
}

/* ---- 操作目录 ---- */
.page-faq .faq-toc {
  background: var(--navy-deep);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 18px 16px 16px;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(215, 225, 234, .55);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--white);
  background: rgba(0, 229, 199, .09);
  border-left-color: var(--cyan);
  outline: none;
}

.page-faq .faq-toc__num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--rock);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover .faq-toc__num,
.page-faq .faq-toc__link:focus-visible .faq-toc__num {
  color: var(--cyan);
}

/* ---- 章节通用 ---- */
.page-faq .faq-sec {
  padding: 32px 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 90px;
}

.page-faq .faq-flow > .faq-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-sec__head {
  margin-bottom: 22px;
}

.page-faq .faq-sec__eyebrow {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-sec__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-sec__lede {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(215, 225, 234, .82);
}

/* ---- 步骤 ---- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 18px;
  background: var(--navy-deep);
  border-left: 2px solid rgba(0, 229, 199, .5);
  border-radius: 0 6px 6px 0;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-step:hover {
  border-left-color: var(--cyan);
  transform: translateX(2px);
}

.page-faq .faq-step__n {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-step__t {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-faq .faq-step__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(215, 225, 234, .84);
}

.page-faq .faq-step__body {
  min-width: 0;
}

/* ---- 注册章节图文并排 ---- */
.page-faq .faq-media-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  overflow: hidden;
  background: var(--navy-deep);
}

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

/* ---- 常见问题折叠 ---- */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
}

.page-faq .faq-qa__item {
  background: var(--navy-deep);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-qa__item[open] {
  border-color: rgba(0, 229, 199, .42);
}

.page-faq .faq-qa__q {
  position: relative;
  padding: 14px 46px 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa__q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-faq .faq-qa__item[open] .faq-qa__q::after {
  content: "–";
}

.page-faq .faq-qa__q:hover,
.page-faq .faq-qa__q:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-qa__a {
  margin: 0;
  padding: 0 16px 16px;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(215, 225, 234, .84);
}

/* ---- 米白字段横带 ---- */
.page-faq .faq-fields {
  margin: 26px 0;
  padding: 26px 20px 22px;
  background: var(--cream);
  color: var(--navy);
  border-radius: 4px 4px 6px 6px;
  border-top: 3px solid var(--cyan-ink);
}

.page-faq .faq-fields__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.25;
  color: var(--navy);
}

.page-faq .faq-fields__lede {
  margin: 0 0 20px;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(10, 37, 64, .78);
}

.page-faq .faq-fields__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(10, 37, 64, .16);
  border: 1px solid rgba(10, 37, 64, .16);
}

.page-faq .faq-field {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--cream);
}

.page-faq .faq-field__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan-ink);
}

.page-faq .faq-field__v {
  font-size: 14px;
  line-height: 1.62;
  color: rgba(10, 37, 64, .88);
}

/* ---- 宽幅场景图 ---- */
.page-faq .faq-wide-figure {
  margin: 28px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  overflow: hidden;
  background: var(--navy-deep);
}

.page-faq .faq-wide-figure img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-wide-figure__cap {
  padding: 11px 15px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(215, 225, 234, .62);
}

/* ---- 退换情形 ---- */
.page-faq .faq-returns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-return {
  padding: 14px 16px;
  background: var(--navy-deep);
  border-left: 2px solid var(--orange);
  border-radius: 0 6px 6px 0;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-return:hover {
  background: rgba(255, 122, 69, .07);
}

.page-faq .faq-return__n {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-faq .faq-return__t {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-faq .faq-return__d {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: rgba(215, 225, 234, .8);
}

.page-faq .faq-returns__note {
  margin: 18px 0 0;
  max-width: 68ch;
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(215, 225, 234, .74);
}

/* ---- 人工帮助 ---- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-help__contact {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-faq .faq-copy {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 13px 15px;
  text-align: left;
  background: var(--navy-deep);
  border: 1px dashed var(--line);
  border-radius: 6px;
  color: var(--mist);
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  border-color: var(--cyan);
  background: rgba(0, 229, 199, .08);
  outline: none;
}

.page-faq .faq-copy.is-done {
  border-color: var(--moss);
  background: rgba(94, 122, 90, .14);
}

.page-faq .faq-copy__k {
  flex: none;
  min-width: 50px;
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(215, 225, 234, .55);
}

.page-faq .faq-copy__v {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-copy__s {
  flex: none;
  font-size: 12px;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-help__hint {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(215, 225, 234, .7);
}

.page-faq .faq-links {
  display: grid;
  gap: 10px;
}

.page-faq .faq-link {
  display: block;
  padding: 14px 16px;
  background: var(--navy-deep);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
  outline: none;
}

.page-faq .faq-link__t {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-link__d {
  display: block;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(215, 225, 234, .72);
}

/* ---- 平板及以上 ---- */
@media (min-width: 641px) {
  .page-faq .faq-fields__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

/* ---- 桌面：目录固定 + 内容右置 ---- */
@media (min-width: 901px) {
  .page-faq .faq-hero {
    padding: 30px 0 52px;
  }

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

  .page-faq .faq-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 52px;
    padding-top: 48px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 84px;
    align-self: start;
  }

  .page-faq .faq-sec {
    padding: 38px 0;
  }

  .page-faq .faq-media-row {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 24px;
  }

  .page-faq .faq-fields {
    padding: 30px 26px 26px;
  }
}

/* ---- 宽屏 ---- */
@media (min-width: 1181px) {
  .page-faq .faq-returns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 64px;
  }
}

/* ---- 降级 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .page-faq .faq-step,
  .page-faq .faq-link,
  .page-faq .faq-copy,
  .page-faq .faq-toc__link {
    transition: none;
  }

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