.page-faq {
  --faq-gap: clamp(18px, 3vw, 34px);
  --faq-pad: clamp(44px, 7vw, 92px);
  --faq-rail: 176px;
  --faq-sticky: 68px;
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-wrap: break-word;
}

.page-faq .shell {
  width: 100%;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  color: var(--stone);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--stone);
  opacity: 0.6;
}

.page-faq .breadcrumbs a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumbs li[aria-current="page"] {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 100% at 88% 0%, rgba(70, 240, 190, 0.13), transparent 58%),
    radial-gradient(90% 90% at 6% 100%, rgba(184, 87, 66, 0.12), transparent 60%),
    linear-gradient(180deg, var(--night) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0 0 24px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--stone);
}

.page-faq .faq-hero__meta-item {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-hero__meta-item .num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
}

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

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius-m);
  background: linear-gradient(140deg, var(--moss), var(--deep));
}

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

.page-faq .faq-figure--hero {
  aspect-ratio: 2 / 1;
}

.page-faq .faq-figure--side {
  aspect-ratio: 10 / 7;
}

/* ---------- 主题跳转条 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: var(--faq-sticky);
  z-index: 20;
  background: rgba(6, 18, 29, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.page-faq .faq-jump__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
  white-space: nowrap;
}

.page-faq .faq-jump__list {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(70, 240, 190, 0.08);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  padding: var(--faq-pad) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-block--alt {
  background:
    linear-gradient(180deg, rgba(14, 32, 54, 0.92), rgba(10, 31, 25, 0.96)),
    var(--night);
}

.page-faq .faq-block__grid {
  display: grid;
  gap: clamp(14px, 2.4vw, 26px);
}

.page-faq .rail {
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

.page-faq .rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-faq .faq-block__body {
  max-width: 74ch;
}

.page-faq .faq-block h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.8vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-block__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-block__body a,
.page-faq .faq-feedback a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 240, 190, 0.4);
}

.page-faq .faq-block__body a:hover,
.page-faq .faq-block__body a:focus-visible,
.page-faq .faq-feedback a:hover,
.page-faq .faq-feedback a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-block__note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 操作步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 42px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

/* ---------- 战术板装饰 ---------- */
.page-faq .faq-board {
  position: relative;
  margin-top: clamp(18px, 3vw, 28px);
  aspect-ratio: 16 / 6;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-color: rgba(6, 18, 29, 0.62);
  background-image:
    repeating-linear-gradient(to right, rgba(139, 154, 147, 0.16) 0 1px, transparent 1px 12.5%),
    repeating-linear-gradient(to bottom, rgba(139, 154, 147, 0.12) 0 1px, transparent 1px 50%);
  overflow: hidden;
}

.page-faq .faq-board__tile {
  position: absolute;
  width: 12%;
  aspect-ratio: 1 / 1;
  border-radius: 6px;
  border: 1px solid var(--glass-brd);
  background: var(--glass);
}

.page-faq .faq-board__tile--a {
  left: 8%;
  top: 18%;
  border-color: rgba(70, 240, 190, 0.6);
  box-shadow: 0 0 0 4px rgba(70, 240, 190, 0.12);
}

.page-faq .faq-board__tile--b {
  left: 34%;
  top: 46%;
  border-color: rgba(70, 240, 190, 0.5);
  background: rgba(70, 240, 190, 0.18);
}

.page-faq .faq-board__tile--c {
  left: 60%;
  top: 14%;
  border-color: rgba(255, 138, 61, 0.55);
  background: rgba(255, 138, 61, 0.16);
}

.page-faq .faq-board__tile--d {
  left: 80%;
  top: 52%;
  border-color: rgba(184, 87, 66, 0.7);
  background: rgba(184, 87, 66, 0.22);
}

/* ---------- 刷新节奏表 ---------- */
.page-faq .faq-rhythm {
  margin: 0 0 22px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-rhythm__row {
  display: grid;
  gap: 4px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-rhythm dt {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-rhythm dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 客户端四类情况 ---------- */
.page-faq .faq-cases {
  display: grid;
  gap: 14px;
  margin: 22px 0;
}

.page-faq .faq-case {
  padding: 16px 18px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line-soft);
  background: rgba(28, 58, 48, 0.42);
}

.page-faq .faq-case h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-case p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 通用小列表 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 8px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--stone);
}

.page-faq .faq-list--tight li {
  font-size: 14px;
}

/* ---------- 反馈区（浅色纸面） ---------- */
.page-faq .faq-feedback {
  padding: var(--faq-pad) 0;
  background: var(--paper);
  color: var(--ink);
}

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

.page-faq .faq-feedback__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-faq .faq-feedback h2 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-feedback__main p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: #24413A;
}

.page-faq .faq-channels {
  display: grid;
  gap: 12px;
  margin: 22px 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-channels li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 14px 16px;
  border: 1px solid rgba(139, 154, 147, 0.5);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius-s);
  background: rgba(213, 227, 221, 0.5);
}

.page-faq .faq-channels__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-faq .faq-channels__val {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.page-faq .faq-feedback__note {
  font-size: 14px;
  line-height: 1.8;
  color: #3C5A52;
}

.page-faq .faq-feedback a {
  color: #8E3E2C;
  border-bottom-color: rgba(184, 87, 66, 0.5);
}

.page-faq .faq-feedback__aside {
  padding: 20px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(139, 154, 147, 0.4);
  background: rgba(255, 255, 255, 0.42);
}

.page-faq .faq-feedback__aside-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-feedback__aside .faq-list li {
  color: #24413A;
}

.page-faq .faq-feedback__aside .faq-list li::before {
  background: var(--clay);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-block--qa {
  border-bottom: none;
}

.page-faq .faq-group {
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-faq .faq-group__title {
  margin: 0 0 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  padding-left: 14px;
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(70, 240, 190, 0.07), transparent 62%);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 6px 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 500;
  color: var(--paper);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--stone);
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--cyan);
}

.page-faq .faq-item > summary:hover::after,
.page-faq .faq-item > summary:focus-visible::after {
  color: var(--cyan);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

.page-faq .faq-item__body {
  padding: 0 6px 18px 0;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-block__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-block__grid--reverse {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr) minmax(0, 5fr);
  }

  .page-faq .faq-rhythm__row {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-feedback__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-item > summary {
    font-size: 17px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --faq-sticky: 76px;
  }

  .page-faq .faq-figure--hero {
    aspect-ratio: 21 / 9;
  }

  .page-faq .faq-figure--side {
    align-self: start;
    position: sticky;
    top: calc(var(--faq-sticky) + 76px);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-jump__label {
    display: none;
  }

  .page-faq .faq-jump__link {
    padding: 5px 11px;
    font-size: 12.5px;
  }

  .page-faq .faq-hero__meta {
    gap: 8px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-jump__link {
    transition: none;
  }
}