.page-faq {
  --faq-side: 244px;
  --faq-gap: clamp(28px, 5vw, 64px);
  --faq-ink-soft: rgba(16, 19, 23, .74);
  --faq-ink-mute: rgba(16, 19, 23, .58);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray);
}
.page-faq .breadcrumb a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}
.page-faq .breadcrumb span[aria-hidden] {
  margin: 0 8px;
  color: rgba(138, 143, 152, .55);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px) var(--gutter) 0;
}
.page-faq .faq-hero .kicker {
  color: var(--red);
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: 14px 0 0;
  max-width: 16ch;
}
.page-faq .faq-hero-lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero-media {
  margin: clamp(26px, 4vw, 42px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-faq .faq-hero-facts {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-hero-facts li {
  background: var(--paper);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-faq .faq-fact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
  text-transform: uppercase;
}
.page-faq .faq-fact-val {
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.35;
  color: var(--ink);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  max-width: var(--wrap);
  margin: clamp(44px, 6vw, 78px) auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  display: none;
}
.page-faq .faq-index .index-bar {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}
.page-faq .faq-index-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
}
.page-faq .faq-index-list li {
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 2px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
  transition: color var(--t-fast), padding-left var(--t-fast);
}
.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
  transition: color var(--t-fast);
}
.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--red);
  padding-left: 6px;
}
.page-faq .faq-index-list a:hover .faq-index-num,
.page-faq .faq-index-list a:focus-visible .faq-index-num {
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 88px;
}
.page-faq .faq-section + .faq-section {
  margin-top: clamp(48px, 7vw, 84px);
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line);
}
.page-faq .faq-section .index-bar {
  color: var(--gray);
}
.page-faq .faq-section h2 {
  font-family: var(--font-display);
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  max-width: 22ch;
}
.page-faq .faq-intro {
  margin: 14px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-ink-mute);
}
.page-faq .faq-intro + .faq-list,
.page-faq .faq-intro + .faq-pulse {
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 一周节奏可视化 ---------- */
.page-faq .faq-pulse {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
  color: var(--on-dark);
}
.page-faq .faq-pulse-head {
  padding: clamp(18px, 3vw, 26px) clamp(16px, 4vw, 30px) 0;
}
.page-faq .faq-pulse-head .kicker {
  color: var(--cyan);
}
.page-faq .faq-pulse-head p:last-child {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark);
}
.page-faq .faq-pulse-track {
  position: relative;
  display: flex;
  align-items: flex-start;
  padding: 28px clamp(16px, 4vw, 30px) 24px;
}
.page-faq .faq-pulse-track::before {
  content: "";
  position: absolute;
  left: clamp(16px, 4vw, 30px);
  right: clamp(16px, 4vw, 30px);
  top: 32px;
  height: 1px;
  background: rgba(244, 239, 230, .18);
}
.page-faq .pulse-node {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding-top: 20px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--on-dark-dim);
}
.page-faq .pulse-node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--gray);
  box-shadow: 0 0 0 3px var(--ink);
}
.page-faq .pulse-node--key::before {
  background: var(--orange);
}
.page-faq .pulse-node--data::before {
  background: var(--cyan);
}

.page-faq .faq-pulse-figure {
  margin: 18px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--blue);
}
.page-faq .faq-pulse-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-faq .faq-pulse-figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--on-dark-dim);
  background: var(--ink);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  margin-top: clamp(20px, 3vw, 28px);
}
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t-mid);
}
.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--line);
}
.page-faq .faq-item[open] {
  border-bottom-color: var(--red);
}
.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 18px 48px 18px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  transition: color var(--t-mid), padding-left var(--t-mid);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::marker {
  content: "";
}
.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--red);
  padding-left: 6px;
}
.page-faq .faq-item[open] summary {
  color: var(--red);
}
.page-faq .faq-item summary::before,
.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  background: var(--red);
  transition: transform var(--t-mid), background var(--t-mid);
}
.page-faq .faq-item summary::before {
  width: 13px;
  height: 1.5px;
  margin-top: -0.75px;
}
.page-faq .faq-item summary::after {
  width: 1.5px;
  height: 13px;
  margin-top: -6.5px;
  margin-right: 5.75px;
}
.page-faq .faq-item[open] summary::after {
  transform: scaleY(0);
}

.page-faq .faq-answer {
  padding: 0 0 22px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}
.page-faq .faq-answer p {
  margin: 0 0 12px;
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-answer a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--red);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* 长回答内的两栏对照 */
.page-faq .faq-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 16px 0 4px;
}
.page-faq .faq-col {
  border: 1px solid var(--line);
  border-left: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: rgba(22, 50, 79, .04);
  transition: border-color var(--t-mid), box-shadow var(--t-mid);
}
.page-faq .faq-col:hover {
  border-left-color: var(--red);
  box-shadow: var(--shadow-2);
}
.page-faq .faq-col-title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink);
}
.page-faq .faq-col p:not(.faq-col-title) {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--faq-ink-mute);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-contact-card {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-contact-main {
  background: var(--paper);
  padding: clamp(20px, 3vw, 30px);
}
.page-faq .faq-contact-main .kicker {
  color: var(--red);
}
.page-faq .faq-contact-list {
  margin: 14px 0 0;
  padding: 0;
}
.page-faq .faq-contact-list > div {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-contact-list > div:last-child {
  border-bottom: 0;
}
.page-faq .faq-contact-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
  text-transform: uppercase;
}
.page-faq .faq-contact-list dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 20px);
  font-weight: 600;
  letter-spacing: .01em;
}
.page-faq .faq-contact-list dd a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-faq .faq-contact-list dd a:hover,
.page-faq .faq-contact-list dd a:focus-visible {
  color: var(--red);
  border-bottom-color: var(--red);
}
.page-faq .faq-contact-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-ink-mute);
}
.page-faq .faq-contact-side {
  background: var(--blue);
  color: var(--on-dark);
  padding: clamp(20px, 3vw, 30px);
}
.page-faq .faq-contact-side-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--cyan);
}
.page-faq .faq-contact-side p:not(.faq-contact-side-title) {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--on-dark);
}
.page-faq .faq-contact-side a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  transition: color var(--t-fast);
}
.page-faq .faq-contact-side a:hover,
.page-faq .faq-contact-side a:focus-visible {
  color: var(--orange);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
  }
  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: 92px;
  }
  .page-faq .faq-contact-card {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }
  .page-faq .faq-item summary {
    padding-right: 56px;
  }
  .page-faq .faq-pulse-track {
    padding-left: clamp(24px, 4vw, 40px);
    padding-right: clamp(24px, 4vw, 40px);
  }
  .page-faq .faq-pulse-track::before {
    left: clamp(24px, 4vw, 40px);
    right: clamp(24px, 4vw, 40px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero h1 {
    max-width: 18ch;
  }
  .page-faq .faq-pulse-head {
    padding-left: clamp(28px, 4vw, 40px);
    padding-right: clamp(28px, 4vw, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .breadcrumb a,
  .page-faq .faq-index-list a,
  .page-faq .faq-index-num,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::before,
  .page-faq .faq-item summary::after,
  .page-faq .faq-answer a,
  .page-faq .faq-col,
  .page-faq .faq-contact-list dd a {
    transition: none;
  }
}
</PAGE_CSS>