.page-faq {
  --faq-ink-soft: rgba(18, 23, 31, 0.72);
  --faq-ink-mute: rgba(18, 23, 31, 0.56);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(28px, 5vw, 56px);
  background: var(--paper);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(110px, 22vw, 280px);
  height: clamp(110px, 22vw, 280px);
  background: linear-gradient(225deg, var(--ice) 0%, var(--ice) 48%, transparent 48.4%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: clamp(80px, 16vw, 200px);
  height: 2px;
  background: var(--orange);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 36px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
}

.page-faq .faq-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--blue-soft);
}

.page-faq .faq-crumb a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s var(--ease);
}

.page-faq .faq-crumb a:hover {
  border-bottom-color: var(--orange);
}

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--faq-ink-mute);
}

.page-faq .faq-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-64);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-faq .faq-hero__lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 三栏问题分栏 ---------- */

.page-faq .faq-triage {
  padding-bottom: clamp(30px, 5vw, 60px);
}

.page-faq .faq-triage__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--faq-ink-mute);
}

.page-faq .triage-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--paper);
}

.page-faq .triage-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  background: var(--paper);
  color: inherit;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), border-left-color 0.18s var(--ease);
}

.page-faq .triage-card--ios {
  border-left-color: var(--blue);
}

.page-faq .triage-card--login {
  border-left-color: var(--green);
}

.page-faq .triage-card--member {
  border-left-color: var(--orange);
}

.page-faq .triage-card:hover,
.page-faq .triage-card:focus-visible {
  background: var(--paper-2);
}

.page-faq .triage-card:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.page-faq .triage-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-faq .triage-card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-28);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .triage-card__desc {
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .triage-card__go {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--orange);
}

.page-faq .triage-card:hover .triage-card__go {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-triage__stat {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 68ch;
  padding-left: 14px;
  border-left: 2px solid var(--green);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--faq-ink-mute);
}

/* ---------- 单栏阅读区 ---------- */

.page-faq .faq-body {
  padding-bottom: clamp(40px, 7vw, 96px);
}

.page-faq .faq-sec {
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(32px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2.4vw, 28px);
}

.page-faq .faq-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--blue);
}

.page-faq .faq-sec__intro h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-40);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-sec__lede {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-sec__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-sec--wide .field-block,
.page-faq .faq-sec--wide .faq-figure--wide {
  margin-top: clamp(24px, 3.4vw, 40px);
}

/* ---------- 步骤条 ---------- */

.page-faq .steps {
  margin: 0 0 clamp(26px, 3.4vw, 40px);
  padding: 0;
  list-style: none;
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: clamp(18px, 2.6vw, 26px);
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--line-blue);
}

.page-faq .step:last-child::before {
  display: none;
}

.page-faq .step-node {
  position: relative;
  z-index: 1;
  justify-self: center;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  background: var(--paper);
  border: 1px solid var(--blue);
}

.page-faq .step-title {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 700;
  line-height: 1.6;
}

.page-faq .step-text {
  margin: 6px 0 0;
  max-width: 58ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-sub {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--faq-ink-mute);
}

.page-faq .qa-list {
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-17);
  line-height: 1.6;
  transition: color 0.16s var(--ease);
}

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

.page-faq .qa-head::before {
  content: "";
  flex: none;
  align-self: center;
  width: 0;
  height: 0;
  margin-top: 2px;
  border-left: 7px solid var(--blue);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transform-origin: 22% 50%;
  transition: transform 0.16s var(--ease), border-left-color 0.16s var(--ease);
}

.page-faq .qa[open] .qa-head::before {
  transform: rotate(90deg);
  border-left-color: var(--orange);
}

.page-faq .qa-head:hover::before,
.page-faq .qa[open] .qa-num {
  border-left-color: var(--orange);
  color: var(--orange);
}

.page-faq .qa-num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  color: var(--blue);
  transition: color 0.16s var(--ease);
}

.page-faq .qa-title {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-body {
  margin: 0;
  padding: 0 0 20px 35px;
}

.page-faq .qa-part {
  margin: 0 0 12px;
}

.page-faq .qa-part:last-child {
  margin-bottom: 0;
}

.page-faq .qa-part dt {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  color: var(--green);
}

.page-faq .qa-part dd {
  margin: 4px 0 0;
  max-width: 58ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 字段提示列表 ---------- */

.page-faq .field-hint {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .field-hint li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .field-hint__key {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-faq .field-hint__val {
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 路径行 ---------- */

.page-faq .path-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 30px);
  padding: 14px 16px;
  border: 1px solid var(--line-blue);
  background: var(--paper-2);
}

.page-faq .path-line__label {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  color: var(--faq-ink-mute);
}

.page-faq .path-line__step {
  padding: 4px 10px;
  border: 1px solid var(--blue-soft);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--blue);
}

.page-faq .path-line__step--end {
  border-color: var(--orange);
  color: var(--orange);
}

.page-faq .path-line__arrow {
  color: var(--blue-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
}

/* ---------- 侧栏说明块 ---------- */

.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure .media-frame {
  border: 1px solid var(--line-blue);
  background: var(--paper-2);
}

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

.page-faq .note-card {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line-blue);
  border-top: 3px solid var(--orange);
  background: var(--paper-2);
}

.page-faq .note-card--green {
  border-top-color: var(--green);
}

.page-faq .note-card__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-faq .note-card__text {
  margin: 0 0 10px;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .note-card__text:last-child {
  margin-bottom: 0;
}

/* ---------- 反馈清单块 ---------- */

.page-faq .field-block {
  padding: clamp(18px, 2.8vw, 30px);
  border: 1px solid var(--line-blue);
  border-left: 4px solid var(--blue);
  background: var(--ice);
}

.page-faq .field-block__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--blue);
}

.page-faq .field-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-faq .field-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(27, 79, 134, 0.36);
}

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

.page-faq .field-key {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--green);
}

.page-faq .field-val {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* ---------- 联系方式 ---------- */

.page-faq .contact-block {
  margin-top: clamp(24px, 3.4vw, 40px);
  border-top: 2px solid var(--blue);
}

.page-faq .contact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .contact-key {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-faq .contact-val {
  font-size: var(--fs-20);
  font-weight: 700;
  line-height: 1.5;
  word-break: break-word;
}

.page-faq .contact-val a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  transition: color 0.16s var(--ease);
}

.page-faq .contact-val a:hover {
  color: var(--orange);
}

.page-faq .contact-val--plain {
  font-weight: 500;
  color: var(--faq-ink-soft);
}

.page-faq .faq-outro {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  max-width: 68ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-outro a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--blue-soft);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-outro a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .triage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .field-hint li,
  .page-faq .field-list li,
  .page-faq .contact-row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-faq .field-list li {
    padding: 12px 0;
  }

  .page-faq .qa-part {
    display: grid;
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 14px;
  }

  .page-faq .qa-part dd {
    margin-top: 0;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-sec__cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    align-items: start;
  }

  .page-faq .faq-sec--wide .faq-sec__head,
  .page-faq .faq-sec--wide .field-block {
    max-width: 900px;
  }

  .page-faq .faq-figure--wide {
    max-width: 760px;
  }

  .page-faq .faq-sec__head {
    gap: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}
</main>