.page-faq {
  --faq-rail-w: 244px;
  --faq-amber-ink: #8A5A0C;
  --faq-rule: 1px solid var(--mist);
  display: block;
  background: var(--silver);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 6vw, 84px) 0 clamp(48px, 6vw, 88px);
  color: var(--paper);
  background:
    linear-gradient(112deg, var(--ink) 0 60%, transparent 60%),
    linear-gradient(150deg, #16345C 0%, var(--ink-2) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(215, 222, 232, .06) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(215, 222, 232, .04) 0 1px, transparent 1px 72px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -12%;
  right: 24%;
  width: 1px;
  height: 132%;
  pointer-events: none;
  transform: rotate(19deg);
  background: linear-gradient(180deg, transparent, rgba(255, 107, 44, .5), transparent);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: end;
}

.page-faq .faq-hero-copy {
  max-width: 42ch;
}

.page-faq .faq-hero .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.page-faq .faq-hero .breadcrumb li {
  color: rgba(252, 253, 255, .5);
}

.page-faq .faq-hero .breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: rgba(252, 253, 255, .3);
}

.page-faq .faq-hero .breadcrumb a {
  color: rgba(252, 253, 255, .82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}

.page-faq .faq-hero .breadcrumb a:hover {
  border-bottom-color: rgba(252, 253, 255, .6);
}

.page-faq .faq-hero-label {
  margin: 26px 0 0;
  color: var(--cyan);
  letter-spacing: .2em;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 5.4vw, 68px);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-hero-lede {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(252, 253, 255, .76);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero .btn-ghost {
  color: var(--paper);
  border-color: rgba(215, 222, 232, .42);
}

.page-faq .faq-hero .btn-ghost:hover {
  background: rgba(252, 253, 255, .08);
  border-color: var(--paper);
}

.page-faq .faq-hero-facts {
  display: grid;
  margin: 0;
  border-top: var(--faq-rule);
  border-top-color: rgba(215, 222, 232, .22);
}

.page-faq .faq-fact {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(215, 222, 232, .22);
}

.page-faq .faq-fact dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(252, 253, 255, .58);
}

.page-faq .faq-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .04em;
  color: var(--paper);
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: clamp(32px, 4.5vw, 64px);
  padding-bottom: clamp(48px, 6vw, 88px);
}

.page-faq .faq-rail {
  margin-bottom: 28px;
}

.page-faq .faq-rail-label {
  margin: 0 0 12px;
  color: var(--muted);
}

.page-faq .faq-index {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}

.page-faq .faq-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .faq-index a:hover {
  background: var(--paper);
  border-color: var(--mist);
  transform: translateX(2px);
}

.page-faq .faq-index a.is-active {
  background: var(--paper);
  border-color: var(--mist);
  border-left-color: var(--signal);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  transition: color .2s var(--ease);
}

.page-faq .faq-index a:hover .faq-index-num,
.page-faq .faq-index a.is-active .faq-index-num {
  color: var(--signal);
}

.page-faq .faq-rail-note {
  display: none;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: var(--faq-rule);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-rail-note a {
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 110, 119, .35);
}

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

/* ---------- 章节 ---------- */

.page-faq .faq-section {
  scroll-margin-top: 96px;
  padding: clamp(34px, 4.4vw, 60px) 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-main > .faq-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-section-head {
  max-width: 64ch;
}

.page-faq .faq-section-head .index-label {
  margin: 0;
  color: var(--cyan-ink);
}

.page-faq .faq-section-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--text);
}

.page-faq .faq-section-head p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-section-head a {
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 110, 119, .35);
}

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

.page-faq .faq-inline-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-inline-note a {
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 110, 119, .35);
}

/* ---------- 图 ---------- */

.page-faq .figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-faq .figure-frame {
  border: var(--faq-rule);
  background: var(--paper);
  box-shadow: var(--shadow-panel);
}

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

.page-faq .figure-caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 六步卡点 ---------- */

.page-faq .faq-step-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step-card {
  position: relative;
  padding: 20px 20px 22px 24px;
  background: var(--paper);
  border: var(--faq-rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-faq .faq-step-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  border-radius: var(--radius) 0 0 var(--radius);
  background: var(--mist);
}

.page-faq .faq-step-card--slow::before {
  background: var(--amber);
}

.page-faq .faq-step-card:hover {
  transform: translateY(-3px);
}

.page-faq .faq-step-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-faq .faq-step-card--slow .faq-step-num {
  color: var(--faq-amber-ink);
}

.page-faq .faq-step-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-step-symptom {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-step-fix {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-step-fix a {
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 110, 119, .35);
}

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

.page-faq .faq-fix-key {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan-ink);
}

.page-faq .faq-step-badge {
  display: inline-block;
  margin-top: 14px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--faq-amber-ink);
  background: rgba(244, 166, 59, .16);
  border: 1px solid rgba(244, 166, 59, .45);
  border-radius: 999px;
}

/* ---------- 通用面板 ---------- */

.page-faq .faq-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-two-col--tight {
  margin-top: 14px;
}

.page-faq .faq-panel-card {
  padding: clamp(18px, 2.2vw, 28px);
  background: var(--paper);
  border: var(--faq-rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-panel-card--amber {
  border-top: 3px solid var(--amber);
}

.page-faq .faq-panel-card--cyan {
  border-top: 3px solid var(--cyan);
}

.page-faq .faq-panel-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-panel-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-panel-card ul {
  margin: 0;
  padding-left: 18px;
}

.page-faq .faq-panel-card li {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-panel-card li:first-child {
  margin-top: 0;
}

.page-faq .faq-panel-card li::marker {
  color: var(--signal);
}

/* ---------- 回执时间刻度 ---------- */

.page-faq .faq-receipt {
  margin-top: 14px;
}

.page-faq .faq-timeline {
  margin-top: 22px;
}

.page-faq .faq-timeline-track {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: var(--mist);
}

.page-faq .faq-timeline-span {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 64%, var(--amber) 100%);
}

.page-faq .faq-timeline-mark {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--cyan);
}

.page-faq .faq-timeline-mark--1 {
  left: 0;
  transform: translate(0, -50%);
}

.page-faq .faq-timeline-mark--2 {
  left: 33%;
}

.page-faq .faq-timeline-mark--3 {
  left: 66%;
}

.page-faq .faq-timeline-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 订阅范围 ---------- */

.page-faq .faq-scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-scope-card {
  padding: 20px;
  background: var(--paper);
  border: var(--faq-rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-scope-switch {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.page-faq .faq-scope-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--mist);
  background: transparent;
}

.page-faq .faq-scope-dot--on {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(22, 194, 200, .14);
}

.page-faq .faq-scope-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-scope-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 加载速度 ---------- */

.page-faq .faq-speed {
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-meter-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) 62px;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-meter-row + .faq-meter-row {
  margin-top: 16px;
}

.page-faq .faq-meter-label {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-meter {
  height: 10px;
  border-radius: 999px;
  background: var(--silver);
  overflow: hidden;
}

.page-faq .faq-meter-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-faq .faq-meter-fill--slow {
  width: 100%;
  background: linear-gradient(90deg, #93A6C0, var(--muted));
}

.page-faq .faq-meter-fill--fast {
  width: 50%;
  background: linear-gradient(90deg, var(--cyan-ink), var(--cyan));
}

.page-faq .faq-meter-value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  text-align: right;
  color: var(--text);
}

/* ---------- 常见疑问 ---------- */

.page-faq .faq-qa {
  margin-top: 12px;
  background: var(--paper);
  border: var(--faq-rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-qa:first-of-type {
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-qa > summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 17px 20px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--signal);
}

.page-faq .faq-qa[open] > summary::after {
  content: "−";
}

.page-faq .faq-qa[open] > summary {
  border-bottom: var(--faq-rule);
}

.page-faq .faq-qa-body {
  padding: 16px 20px 20px;
}

.page-faq .faq-qa-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--muted);
}

/* ---------- 反馈 ---------- */

.page-faq .faq-feedback {
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-checklist {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-checklist li::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border: 2px solid var(--signal);
  border-radius: 50%;
}

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

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  .page-faq .faq-hero::after {
    display: none;
  }

  .page-faq .faq-meter-row {
    grid-template-columns: minmax(0, 1fr) 58px;
    grid-template-areas:
      "label value"
      "bar bar";
    row-gap: 8px;
  }

  .page-faq .faq-meter-label {
    grid-area: label;
  }

  .page-faq .faq-meter {
    grid-area: bar;
  }

  .page-faq .faq-meter-value {
    grid-area: value;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-faq .faq-hero-copy {
    max-width: 46ch;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 68px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    align-self: start;
    margin-bottom: 0;
  }

  .page-faq .faq-index {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index a {
    white-space: normal;
    flex: initial;
  }

  .page-faq .faq-rail-note {
    display: block;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-step-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step-card,
  .page-faq .faq-index a {
    transition: none;
  }

  .page-faq .faq-index a:hover,
  .page-faq .faq-step-card:hover {
    transform: none;
  }
}