.page-faq {
  --faq-line: rgba(143, 163, 184, 0.26);
  --faq-line-soft: rgba(143, 163, 184, 0.14);
  --faq-amber-ink: #a35f00;
  background:
    radial-gradient(1100px 640px at 84% -10%, rgba(122, 92, 255, 0.22), transparent 62%),
    radial-gradient(900px 560px at 2% 8%, rgba(45, 226, 230, 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(45, 226, 230, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 226, 230, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 76%);
}

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

.page-faq .breadcrumb {
  font-size: 13px;
  color: var(--steel);
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .breadcrumb a {
  color: var(--cyan-soft);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-faq h1 {
  font-size: clamp(30px, 6.4vw, 58px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 15em;
}

.page-faq .lede {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 36em;
  margin: 0 0 26px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .faq-hero__meta li::before {
  content: "▚ ";
  color: var(--amber);
}

/* ---------- 快捷路径面板 ---------- */
.page-faq .quick-panel {
  position: relative;
  background: linear-gradient(165deg, rgba(11, 30, 54, 0.97), rgba(7, 20, 38, 0.97));
  border: 2px solid var(--faq-line);
  box-shadow: 10px 10px 0 rgba(45, 226, 230, 0.18), 0 24px 60px rgba(0, 0, 0, 0.45);
  padding: clamp(18px, 3vw, 26px);
}

.page-faq .quick-panel__title {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 8px;
}

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

.page-faq .quick-item {
  position: relative;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .quick-item:first-child {
  border-top: 0;
}

.page-faq .quick-item__check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .quick-item__label {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 22px;
  grid-template-areas:
    "num title box"
    "num text box";
  align-items: center;
  column-gap: 12px;
  row-gap: 2px;
  padding: 13px 0;
  cursor: pointer;
}

.page-faq .quick-item__num {
  grid-area: num;
  font-size: 22px;
  font-weight: 700;
  color: rgba(45, 226, 230, 0.7);
  line-height: 1;
}

.page-faq .quick-item__title {
  grid-area: title;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .quick-item__text {
  grid-area: text;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-faq .quick-item__box {
  grid-area: box;
  width: 20px;
  height: 20px;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  position: relative;
}

.page-faq .quick-item__check:checked + .quick-item__label .quick-item__num {
  color: var(--green);
}

.page-faq .quick-item__check:checked + .quick-item__label .quick-item__box {
  border-color: var(--green);
  background: rgba(61, 220, 151, 0.16);
}

.page-faq .quick-item__check:checked + .quick-item__label .quick-item__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border: solid var(--green);
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}

.page-faq .quick-item__check:focus-visible + .quick-item__label {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .quick-panel__foot {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding: clamp(36px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-section__head {
  border-left: 3px solid var(--amber);
  padding-left: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-section__index {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-faq .faq-section h2 {
  font-size: clamp(21px, 3.4vw, 33px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-faq .faq-section__lede {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 42em;
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

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

.page-faq .step {
  display: grid;
  grid-template-columns: clamp(42px, 8vw, 62px) minmax(0, 1fr);
  gap: clamp(10px, 2vw, 18px);
  align-items: start;
  padding: clamp(14px, 2.4vw, 20px);
  background: linear-gradient(180deg, rgba(11, 30, 54, 0.86), rgba(7, 20, 38, 0.86));
  border: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-faq .step:hover {
  border-color: rgba(45, 226, 230, 0.45);
  box-shadow: 6px 6px 0 rgba(45, 226, 230, 0.12);
  transform: translateY(-2px);
}

.page-faq .step--key {
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(255, 159, 28, 0.1), rgba(7, 20, 38, 0.92));
}

.page-faq .step__num {
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: rgba(45, 226, 230, 0.5);
  letter-spacing: -0.04em;
}

.page-faq .step--key .step__num {
  color: var(--amber);
}

.page-faq .step__title {
  margin: 0 0 6px;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  color: var(--text);
}

.page-faq .step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 2px solid var(--faq-line);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 rgba(122, 92, 255, 0.2);
}

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

.page-faq .faq-figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
  padding: 10px 12px;
  border-top: 1px solid var(--faq-line-soft);
}

/* ---------- 平台切换 ---------- */
.page-faq .platform-tabs {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .platform-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .platform-tab {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  padding: 8px 15px;
  min-height: 40px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .platform-tab:hover {
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

.page-faq .platform-tab[aria-selected="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .platform-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .platform-panel {
  padding: clamp(16px, 2.5vw, 24px);
  background: rgba(11, 30, 54, 0.72);
  border: 1px solid var(--faq-line);
  border-top: 0;
}

.page-faq .platform-panel[hidden] {
  display: none;
}

.page-faq .platform-panel__name {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan-soft);
  margin: 0 0 12px;
}

.page-faq .platform-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .platform-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .platform-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  opacity: 0.75;
}

.page-faq .checksum {
  color: var(--sand);
  letter-spacing: 0.04em;
  word-break: break-all;
}

/* ---------- 提示条 ---------- */
.page-faq .faq-note {
  margin-top: clamp(18px, 3vw, 26px);
  border: 2px solid rgba(255, 159, 28, 0.4);
  border-left-width: 6px;
  background: rgba(255, 159, 28, 0.08);
  padding: 14px 16px;
}

.page-faq .faq-note__title {
  display: block;
  font-size: 14px;
  color: var(--sand);
  margin-bottom: 8px;
}

.page-faq .faq-note__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-note__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-aside {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel);
  border-left: 2px solid var(--faq-line);
  padding-left: 12px;
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 16px;
  align-items: center;
  padding: clamp(16px, 2.6vw, 24px);
  border: 2px solid var(--faq-line);
  background: linear-gradient(120deg, rgba(45, 226, 230, 0.09), rgba(122, 92, 255, 0.1));
}

.page-faq .faq-cta__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

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

/* ---------- 问答区 ---------- */
.page-faq .faq-qa {
  background: var(--mist);
  color: var(--ink);
  padding: clamp(36px, 6vw, 76px) 0;
  margin-top: clamp(8px, 2vw, 16px);
}

.page-faq .faq-section__head--dark {
  border-left-color: var(--ink-2);
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-section__head--dark .faq-section__index {
  color: #0c6a70;
}

.page-faq .faq-qa h2 {
  font-size: clamp(21px, 3.4vw, 32px);
  font-weight: 900;
  line-height: 1.28;
  color: var(--ink);
  margin: 0;
}

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

.page-faq .qa {
  border: 1px solid rgba(7, 20, 38, 0.16);
  border-left: 4px solid rgba(7, 20, 38, 0.2);
  background: rgba(255, 255, 255, 0.8);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .qa[open] {
  border-left-color: var(--amber);
  background: #fff;
}

.page-faq .qa summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--ink-2);
  flex: none;
  margin-top: 2px;
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--faq-amber-ink);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid #0c6a70;
  outline-offset: -2px;
}

.page-faq .qa__body {
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: #1b3550;
}

.page-faq .qa-foot {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: #2c4a66;
}

.page-faq .faq-qa a.link-underline {
  color: #0b4f57;
  text-decoration-color: #0c6a70;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }

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

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

  .page-faq .qa-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-split--reverse .steps {
    order: 2;
  }

  .page-faq .faq-split--reverse .faq-figure {
    order: 1;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .qa,
  .page-faq .platform-tab {
    transition: none;
  }

  .page-faq .step:hover {
    transform: none;
  }
}