/* ===== 操作指引页 /guide/ ===== */
.page-faq {
  --faq-edge: 16px;
  --faq-gap: clamp(18px, 2.6vw, 32px);
  --faq-paper-mute: #6E645B;
  background-color: var(--ink);
  color: var(--graphite);
  overflow-x: hidden;
}

.page-faq .section {
  padding: clamp(46px, 7vw, 78px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .section-head {
  max-width: 62ch;
}

.page-faq .lede {
  max-width: 60ch;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(36px, 6.5vw, 72px) 0 clamp(30px, 4.5vw, 52px);
  border-bottom: 1px solid var(--line);
  background-image:
    radial-gradient(90% 62% at 86% 0%, rgba(56, 224, 206, 0.14), transparent 62%),
    repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px var(--unit)),
    repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px var(--unit));
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 8.4vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-faq .faq-hero .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.8;
  color: var(--graphite);
  max-width: 58ch;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(30px, 5vw, 52px);
}

.page-faq .faq-flow-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silent);
}

.page-faq .flow-3 {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .flow-step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: linear-gradient(158deg, rgba(15, 26, 34, 0.96), rgba(7, 12, 17, 0.96));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-edge)) 0, 100% var(--faq-edge), 100% 100%, 0 100%);
}

.page-faq .flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ember);
}

.page-faq .step-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.16rem;
  letter-spacing: 0.01em;
  color: #fff;
}

.page-faq .step-note {
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--silent);
}

.page-faq .faq-legacy {
  padding: clamp(20px, 3vw, 28px);
  background: rgba(15, 26, 34, 0.72);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-legacy .eyebrow {
  color: var(--clay);
}

.page-faq .legacy-steps {
  list-style: none;
  counter-reset: legacy;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .legacy-steps li {
  counter-increment: legacy;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(124, 140, 150, 0.2);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--silent);
}

.page-faq .legacy-steps li::before {
  content: counter(legacy, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--clay);
}

.page-faq .legacy-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 三步详解 ---------- */
.page-faq .step-detail-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-faq .faq-step-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 22px 20px 24px;
  background: var(--night);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-edge)) 0, 100% var(--faq-edge), 100% 100%, 0 100%);
}

.page-faq .faq-step-card header {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-step-card .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  padding: 3px 8px;
  border: 1px solid rgba(255, 122, 61, 0.5);
  background: rgba(255, 122, 61, 0.1);
}

.page-faq .faq-step-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.46rem;
  letter-spacing: 0.01em;
  color: #fff;
}

.page-faq .step-facts {
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}

.page-faq .step-facts > div {
  display: grid;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .step-facts dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .step-facts dd {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.72;
  color: var(--graphite);
}

/* ---------- 图片位 ---------- */
.page-faq .faq-figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  background: var(--night);
  border: 1px solid var(--line);
}

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

.page-faq .faq-figure .media-caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.05em;
  color: var(--silent);
}

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

/* ---------- 五步 / 三步对照（牛皮纸） ---------- */
.page-faq .faq-paper {
  padding: clamp(24px, 4.5vw, 48px);
  background: var(--paper);
  color: var(--soot);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-paper .eyebrow {
  color: var(--clay);
}

.page-faq .faq-paper .editorial-title,
.page-faq .faq-paper h3 {
  color: var(--soot);
}

.page-faq .faq-paper .lede {
  color: #4a3f36;
}

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

.page-faq .diff-cols {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(22px, 3.6vw, 34px);
}

.page-faq .diff-col h3 {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faq-paper-mute);
}

.page-faq .diff-col:last-child h3 {
  color: var(--teal);
}

.page-faq .diff-steps {
  list-style: none;
  counter-reset: ds;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .diff-steps li {
  counter-increment: ds;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 11px 12px;
  border-left: 2px solid var(--line-paper);
  background: rgba(34, 27, 22, 0.05);
  font-size: 0.93rem;
  line-height: 1.6;
  color: var(--faq-paper-mute);
}

.page-faq .diff-steps li::before {
  content: counter(ds, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-faq .diff-steps--new li {
  border-left-color: var(--teal);
  background: rgba(14, 95, 90, 0.1);
  color: var(--soot);
}

.page-faq .diff-notes {
  list-style: none;
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: clamp(18px, 3vw, 24px) 0 0;
  border-top: 1px solid var(--line-paper);
  display: grid;
  gap: 10px;
}

.page-faq .diff-notes li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  font-size: 0.93rem;
  line-height: 1.7;
  color: #3a312a;
}

.page-faq .diff-notes li::before {
  content: "→";
  font-family: var(--font-mono);
  color: var(--clay);
}

.page-faq .paper-foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--faq-paper-mute);
}

/* ---------- 换设备验证 ---------- */
.page-faq .device-grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(24px, 4vw, 38px);
}

.page-faq .device-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .device-steps li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .device-steps li:first-child {
  padding-top: 0;
}

.page-faq .device-steps .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-top: 2px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.page-faq .device-steps p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--graphite);
}

.page-faq .tip-band {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: 16px 22px;
  border: 1px solid rgba(194, 84, 43, 0.55);
  border-left: 4px solid var(--ember);
  background: linear-gradient(90deg, rgba(255, 122, 61, 0.12), transparent 72%);
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--graphite);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

/* ---------- 入口查找 ---------- */
.page-faq .check-list {
  list-style: none;
  counter-reset: chk;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .check-list li {
  counter-increment: chk;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: rgba(15, 26, 34, 0.65);
  border: 1px solid var(--line);
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--graphite);
}

.page-faq .check-list li::before {
  content: counter(chk, decimal-leading-zero);
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--ember);
}

/* ---------- 常见失败情形 ---------- */
.page-faq .faq-qa {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-qa-item {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 24px) 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-qa dt {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  line-height: 1.55;
  color: #fff;
}

.page-faq .faq-qa dd {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-soft);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 人工协助 ---------- */
.page-faq .help-band {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
  padding: clamp(24px, 4.5vw, 46px);
  background: linear-gradient(135deg, rgba(15, 26, 34, 0.96), rgba(7, 12, 17, 0.96) 66%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .help-copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.08;
  color: #fff;
}

.page-faq .help-copy p {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--graphite);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .help-contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .help-contacts .contact-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .help-contacts .contact-label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silent);
}

.page-faq .help-contacts .contact-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  word-break: break-word;
  color: #fff;
}

.page-faq .help-contacts .contact-value--text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-faq .help-contacts .copy-btn {
  white-space: nowrap;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .flow-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-faq .diff-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-faq .step-detail-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .step-detail-grid > :nth-child(2) {
    margin-top: 26px;
  }

  .page-faq .step-detail-grid > :nth-child(3) {
    margin-top: 52px;
  }
}

@media (min-width: 860px) {
  .page-faq .help-band {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .device-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-qa-item {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-qa dd {
    padding-left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .flow-step,
  .page-faq .faq-step-card,
  .page-faq .tip-band,
  .page-faq .help-band {
    clip-path: none;
  }
}