.page-faq {
  --faq-rule: 2px solid var(--moss);
  --faq-gap: clamp(28px, 5vw, 56px);
  background: var(--ink);
  color: var(--bone);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-faq .wrap {
  padding-top: clamp(16px, 3vw, 32px);
}

.page-faq .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 36px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

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

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 0 0 clamp(28px, 5vw, 52px);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-eyebrow {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0 0 20px;
  max-width: 18ch;
  font-size: clamp(32px, 6.2vw, 68px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-faq .lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
}

.page-faq .faq-hero-facts li {
  border: var(--faq-rule);
  background: var(--pine);
  padding: 12px 14px;
}

.page-faq .faq-fact-num {
  display: block;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.1;
  color: var(--bone);
  letter-spacing: -0.01em;
}

.page-faq .faq-fact-key {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节头 ---------- */

.page-faq .faq-sec {
  padding-top: var(--faq-gap);
}

.page-faq .faq-sec-head {
  display: grid;
  gap: 10px;
  padding-top: 20px;
  border-top: var(--faq-rule);
  margin-bottom: clamp(22px, 3.5vw, 36px);
}

.page-faq .faq-sec-num {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-sec-head h2 {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 38px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-faq .faq-sec-head p {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 媒体 ---------- */

.page-faq .media {
  margin: 0 0 clamp(22px, 3.5vw, 34px);
  border: var(--faq-rule);
  background: var(--pine);
  overflow: hidden;
}

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

.page-faq .media-caption {
  display: block;
  padding: 10px 14px;
  border-top: var(--faq-rule);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
  background: var(--ink);
}

/* ---------- 四步卡片 ---------- */

.page-faq .step-track {
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.page-faq .step-item {
  counter-increment: faqstep;
  position: relative;
  padding: 20px 18px 20px;
  background: var(--pine);
  border: var(--faq-rule);
  box-shadow: 8px 8px 0 var(--black);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .step-item:hover,
.page-faq .step-item:focus-within {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-faq .step-item::before {
  content: "0" counter(faqstep);
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 8px;
  border: 1px solid var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .step-item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-faq .step-item p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .step-check {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--moss);
  font-size: 13px;
  line-height: 1.6;
  color: var(--bone);
}

.page-faq .step-check b {
  flex: none;
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 对照演示 ---------- */

.page-faq .faq-demo-grid {
  display: grid;
  gap: 20px;
  align-items: start;
}

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

.page-faq .zone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: var(--faq-rule);
  background: var(--pine);
}

.page-faq .zone-list li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 14px;
  padding: 15px 16px;
  border-bottom: 1px solid var(--moss);
}

.page-faq .zone-list li:last-child {
  border-bottom: 0;
}

.page-faq .zone-key {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--moss);
  font-size: 12.5px;
  color: var(--cyan);
}

.page-faq .zone-list h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 800;
}

.page-faq .zone-list p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */

.page-faq .expander {
  margin-bottom: 10px;
  border: var(--faq-rule);
  background: var(--ink);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .expander[data-open] {
  border-left: 4px solid var(--cyan);
}

.page-faq .expander-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 0;
  background: var(--pine);
  color: var(--bone);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-faq .expander-toggle:hover {
  background: var(--moss);
}

.page-faq .expander-icon {
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
}

.page-faq .expander-panel {
  padding: 0 18px 18px;
}

.page-faq .expander-panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 三步排查 ---------- */

.page-faq .triage {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
}

.page-faq .triage li {
  position: relative;
  padding: 18px 18px 18px 58px;
  background: var(--pine);
  border: var(--faq-rule);
}

.page-faq .triage-num {
  position: absolute;
  left: 14px;
  top: 17px;
  padding: 3px 7px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 11.5px;
  letter-spacing: 0.1em;
}

.page-faq .triage h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
}

.page-faq .triage p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

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

/* ---------- 联系 ---------- */

.page-faq .support-grid {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-faq .support-card {
  padding: 18px;
  border: var(--faq-rule);
  background: var(--pine);
  box-shadow: 8px 8px 0 var(--black);
}

.page-faq .support-key {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .support-val {
  margin: 0 0 8px;
  font-size: clamp(15px, 1.9vw, 18px);
  font-weight: 800;
  line-height: 1.4;
  word-break: break-word;
}

.page-faq .support-val a {
  color: var(--bone);
  text-decoration: none;
  border-bottom: 2px solid var(--moss);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .support-val a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .support-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .support-list {
  list-style: none;
  margin: 0 0 10px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .support-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--bone);
}

.page-faq .support-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--orange);
}

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

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 2px solid var(--moss);
  background: transparent;
  color: var(--bone);
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .btn:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .btn-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--black);
}

.page-faq .btn-primary:hover {
  background: var(--orange);
  border-color: var(--bone);
  color: var(--black);
}

.page-faq .btn-ghost {
  border-color: var(--moss);
  color: var(--mist);
}

.page-faq .btn-ghost:hover {
  color: var(--bone);
  border-color: var(--mist);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .support-card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq .step-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }

  .page-faq .step-item::after {
    content: "";
    position: absolute;
    top: 36px;
    left: 100%;
    width: 26px;
    height: 2px;
    background: var(--cyan);
  }

  .page-faq .step-item:last-child::after {
    content: none;
  }

  .page-faq .faq-demo-grid {
    grid-template-columns: 7fr 5fr;
    gap: 30px;
  }

  .page-faq .faq-sec-head {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "num title"
      ".   text";
    column-gap: 18px;
  }

  .page-faq .faq-sec-num {
    grid-area: num;
    padding-top: 8px;
  }

  .page-faq .faq-sec-head h2 {
    grid-area: title;
  }

  .page-faq .faq-sec-head p {
    grid-area: text;
  }
}

@media (min-width: 1200px) {
  .page-faq .triage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .triage li {
    padding: 20px 20px 20px;
  }

  .page-faq .triage-num {
    position: static;
    display: inline-block;
    margin-bottom: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-item,
  .page-faq .btn,
  .page-faq .expander-toggle {
    transition: none;
  }

  .page-faq .step-item:hover,
  .page-faq .step-item:focus-within,
  .page-faq .btn:hover {
    transform: none;
  }
}