.page-faq {
  --faq-gap: 20px;
  --faq-r: 16px;
  --faq-line: 1px solid var(--line-200);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 8px;
  background:
    radial-gradient(circle at 84% 4%, rgba(63, 214, 208, 0.2), transparent 46%),
    radial-gradient(circle at 6% 0%, rgba(44, 143, 224, 0.16), transparent 44%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image:
    radial-gradient(circle, var(--blue-700) 1px, transparent 1px),
    radial-gradient(circle, var(--blue-700) 1px, transparent 1px);
  background-size: 46px 46px, 92px 92px;
  background-position: 0 0, 23px 23px;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  padding-bottom: 24px;
}

.page-faq .crumbs {
  margin-bottom: 20px;
  font-size: 13px;
}

.page-faq .crumbs ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--text-500);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-200);
}

.page-faq .crumbs a {
  color: var(--blue-700);
  text-decoration: none;
}

.page-faq .crumbs a:hover {
  text-decoration: underline;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: 30px;
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-950);
}

.page-faq .faq-hero__title .grad-text {
  display: inline-block;
}

.page-faq .faq-hero__copy .lead {
  margin-top: 18px;
  max-width: 60ch;
  color: var(--text-700);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 诊断面板 */

.page-faq .faq-panel {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid rgba(201, 222, 243, 0.9);
  background: linear-gradient(158deg, #ffffff 0%, var(--frost-050) 62%, #e8f4fb 100%);
  box-shadow: var(--shadow-soft);
  padding: 22px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-panel__cap {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-700);
  opacity: 0.75;
}

.page-faq .faq-panel__grid {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-faq .faq-panel__cell {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-400);
}

.page-faq .faq-panel__cell dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-500);
}

.page-faq .faq-panel__cell dd {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-panel__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-200);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-500);
}

/* ---------- 四步验证 ---------- */

.page-faq .faq-lead-figure {
  margin: 0 0 40px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--faq-line);
}

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

.page-faq .faq-node {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: #ffffff;
  text-decoration: none;
  color: inherit;
  transition: border-color 220ms var(--ease), transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-faq .faq-node:hover,
.page-faq .faq-node:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan-400);
  box-shadow: 0 16px 34px -24px rgba(18, 78, 140, 0.6);
}

.page-faq .faq-ring {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 15px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--blue-700);
  background: linear-gradient(145deg, rgba(44, 143, 224, 0.12), rgba(63, 214, 208, 0.22));
  border: 1px solid rgba(44, 143, 224, 0.34);
  transition: background 240ms var(--ease), color 240ms var(--ease), box-shadow 240ms var(--ease), border-color 240ms var(--ease);
}

.page-faq .faq-node:hover .faq-ring,
.page-faq .faq-node:focus-visible .faq-ring {
  background: linear-gradient(145deg, var(--blue-500), var(--cyan-400));
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 0 0 6px rgba(63, 214, 208, 0.16);
}

.page-faq .faq-node__label {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-node__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-500);
}

.page-faq .faq-steps__cards {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 36px;
}

.page-faq .faq-step {
  position: relative;
  padding: 24px 22px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: #ffffff;
  scroll-margin-top: 96px;
  transition: border-color 260ms var(--ease), box-shadow 260ms var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 0;
  width: 3px;
  height: 34px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--blue-500), var(--cyan-400));
}

.page-faq .faq-step:target {
  border-color: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(63, 214, 208, 0.2), var(--shadow-soft);
}

.page-faq .faq-step__num {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--blue-500);
}

.page-faq .faq-step__title {
  margin: 8px 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-step__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-700);
}

.page-faq .faq-step__meta,
.page-faq .faq-step__feedback {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-700);
}

.page-faq .faq-step__meta .mono,
.page-faq .faq-step__feedback .mono {
  display: inline-block;
  min-width: 42px;
  margin-right: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-500);
}

.page-faq .faq-step__feedback {
  padding-top: 12px;
  border-top: 1px dashed var(--line-200);
  color: var(--blue-700);
}

/* ---------- 故障分类 ---------- */

.page-faq .faq-faults__list {
  display: grid;
  gap: 0;
  border-top: var(--faq-line);
}

.page-faq .faq-fault {
  display: grid;
  gap: 18px;
  padding: 28px 0;
  border-bottom: var(--faq-line);
}

.page-faq .faq-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-200);
  background: var(--frost-050);
  color: var(--blue-700);
}

.page-faq .faq-tag--quota {
  color: #b6481a;
  background: #fff2e9;
  border-color: #ffd8c1;
}

.page-faq .faq-tag--ghost {
  color: var(--blue-700);
  background: #eaf3fc;
  border-color: var(--line-200);
}

.page-faq .faq-tag--code {
  color: #0e6b67;
  background: #e6f8f5;
  border-color: #b8ece5;
}

.page-faq .faq-tag--net {
  color: #14507f;
  background: #eef7fb;
  border-color: #cfe8f5;
}

.page-faq .faq-fault__title {
  margin: 12px 0 0;
  font-size: 19px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-fault__hint {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-500);
}

.page-faq .faq-fault__actions {
  counter-reset: faqact;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-fault__actions li {
  counter-increment: faqact;
  position: relative;
  padding-left: 42px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-700);
}

.page-faq .faq-fault__actions li::before {
  content: counter(faqact, decimal-leading-zero);
  position: absolute;
  top: 2px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--blue-500);
}

.page-faq .faq-fault__actions li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 22px;
  bottom: -14px;
  left: 30px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-200), rgba(201, 222, 243, 0));
}

/* ---------- 换平板 / 内嵌图 ---------- */

.page-faq .faq-inline-figure {
  margin: 0 auto;
  max-width: 900px;
  padding: 0 24px;
  border-radius: var(--r-lg);
}

.page-faq .faq-inline-figure .media-frame__caption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-500);
}

.page-faq .faq-sequence {
  counter-reset: seq;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-sequence li {
  counter-increment: seq;
  position: relative;
  padding: 22px 22px 22px 68px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: linear-gradient(118deg, #ffffff 0%, var(--frost-050) 100%);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-faq .faq-sequence li:hover {
  transform: translateX(4px);
  border-color: var(--cyan-400);
}

.page-faq .faq-sequence li::before {
  content: counter(seq, decimal-leading-zero);
  position: absolute;
  top: 24px;
  left: 22px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--blue-500);
}

.page-faq .faq-sequence li::after {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 54px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(63, 214, 208, 0));
}

.page-faq .faq-sequence h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-sequence p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-700);
}

/* ---------- 验证码 ---------- */

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

.page-faq .faq-channel {
  padding: 24px 22px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: #ffffff;
}

.page-faq .faq-channel--alt {
  background: linear-gradient(150deg, #ffffff 0%, #eef9f8 100%);
  border-color: rgba(63, 214, 208, 0.5);
}

.page-faq .faq-channel__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--blue-500);
}

.page-faq .faq-channel__title {
  margin: 10px 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-channel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-700);
}

.page-faq .faq-channel__meta {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--line-200);
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.06em;
  color: var(--blue-700) !important;
}

.page-faq .faq-timing {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-timing li {
  padding: 15px 4px;
  border-bottom: 1px dashed var(--line-200);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-700);
}

.page-faq .faq-timing__k {
  display: inline-block;
  min-width: 52px;
  margin-right: 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  color: #1fa79f;
}

/* ---------- 设备名额 ---------- */

.page-faq .faq-devices__inner {
  display: grid;
  gap: 32px;
}

.page-faq .faq-devices__copy p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-700);
}

.page-faq .faq-devices__copy .btn {
  margin-top: 24px;
}

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

.page-faq .faq-device-card {
  padding: 24px 22px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: linear-gradient(155deg, #ffffff 0%, var(--frost-050) 100%);
  min-height: 172px;
}

.page-faq .faq-device-card__num {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--blue-500), var(--cyan-400));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .faq-device-card h3 {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-device-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-700);
}

.page-faq .faq-device-card--wide {
  background: linear-gradient(150deg, #eaf3fc 0%, #e6f8f7 100%);
  border-color: rgba(44, 143, 224, 0.3);
}

/* ---------- 联系前准备 ---------- */

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

.page-faq .faq-check {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--faq-r);
  border: var(--faq-line);
  background: #ffffff;
  cursor: pointer;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-check:hover {
  border-color: var(--cyan-400);
}

.page-faq .faq-check input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.page-faq .faq-check__box {
  grid-column: 1;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 7px;
  border: 1px solid var(--line-200);
  background: var(--frost-050);
  position: relative;
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-check__box::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 3px;
  width: 6px;
  height: 11px;
  border: solid #ffffff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0.4);
  opacity: 0;
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.page-faq .faq-check input:checked + .faq-check__box {
  background: linear-gradient(140deg, var(--blue-500), var(--cyan-400));
  border-color: transparent;
}

.page-faq .faq-check input:checked + .faq-check__box::after {
  opacity: 1;
  transform: rotate(45deg) scale(1);
}

.page-faq .faq-check input:focus-visible + .faq-check__box {
  box-shadow: 0 0 0 4px rgba(63, 214, 208, 0.28);
}

.page-faq .faq-check__text {
  grid-column: 2;
  display: grid;
  gap: 4px;
}

.page-faq .faq-check__text strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-check__text span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-500);
}

.page-faq .faq-handoff {
  margin-top: 30px;
  padding: 24px 22px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(201, 222, 243, 0.9);
  background: linear-gradient(150deg, #f1f7fd 0%, #eaf6fb 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-handoff__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-700);
}

.page-faq .faq-handoff p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-700);
}

.page-faq .faq-handoff a {
  color: var(--blue-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-handoff a:hover {
  color: var(--blue-500);
}

.page-faq .faq-handoff__alt {
  margin-top: 14px !important;
  padding-top: 14px;
  border-top: 1px dashed var(--line-200);
  font-size: 14px !important;
  color: var(--text-500) !important;
}

/* ---------- 固定返回链接 ---------- */

.page-faq .faq-jump {
  display: none;
}

/* ---------- 复位 ---------- */

.page-faq figure {
  margin-left: 0;
  margin-right: 0;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero__title {
    font-size: 36px;
  }

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

  .page-faq .faq-panel__cell:first-child {
    padding-left: 14px;
  }

  .page-faq .faq-track {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

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

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

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

  .page-faq .faq-device-card--wide {
    grid-column: span 2;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 44px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-hero__title {
    font-size: 44px;
    line-height: 1.24;
  }

  .page-faq .faq-panel {
    padding: 26px 24px;
    position: sticky;
    top: 88px;
  }

  .page-faq .faq-panel__grid {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-track {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-faq .faq-track__node {
    position: relative;
  }

  .page-faq .faq-track__node:not(:first-child)::before {
    content: "";
    position: absolute;
    top: 39px;
    left: -16px;
    width: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan-400), var(--blue-500));
    opacity: 0.5;
  }

  .page-faq .faq-fault {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-inline-figure {
    padding: 0;
  }

  .page-faq .faq-devices__inner {
    grid-template-columns: 6fr 6fr;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-jump {
    display: inline-flex;
    align-items: center;
    position: fixed;
    right: 20px;
    bottom: 92px;
    z-index: 40;
    padding: 10px 18px;
    border-radius: var(--r-pill);
    border: 1px solid rgba(201, 222, 243, 0.9);
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(10px);
    font-size: 13px;
    color: var(--blue-700);
    text-decoration: none;
    box-shadow: var(--shadow-soft);
    transition: transform 220ms var(--ease), color 220ms var(--ease), border-color 220ms var(--ease);
  }

  .page-faq .faq-jump:hover {
    transform: translateY(-2px);
    color: var(--blue-500);
    border-color: var(--cyan-400);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-steps__cards {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-sequence {
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
  }

  .page-faq .faq-sequence li {
    padding: 22px 18px 22px 18px;
  }

  .page-faq .faq-sequence li::before {
    position: static;
    display: block;
    margin-bottom: 8px;
  }

  .page-faq .faq-sequence li::after {
    top: 36px;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan-400), rgba(63, 214, 208, 0));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}