.page-faq {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--body-font);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq p {
  margin: 0;
}

.page-faq a {
  color: var(--ice);
}

.page-faq .bb-section {
  padding: clamp(44px, 6.5vw, 92px) 0;
}

.page-faq .bb-section__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-faq .bb-section__head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.1vw, 38px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .bb-section__head p {
  margin-top: 14px;
  color: var(--mist);
  font-size: clamp(15px, 1.1vw, 16.5px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(28px, 5vw, 64px)) 0 0;
  background:
    radial-gradient(120% 92% at 86% -12%, rgba(86, 199, 242, .20), transparent 62%),
    radial-gradient(85% 72% at 4% 8%, rgba(61, 44, 107, .38), transparent 66%),
    var(--ink);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .7;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 0%, #000 18%, transparent 78%);
  mask-image: radial-gradient(120% 100% at 50% 0%, #000 18%, transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero > .bb-container {
  position: relative;
  z-index: 1;
}

.page-faq .bb-breadcrumb {
  font-size: 13px;
  color: var(--mist);
}

.page-faq .bb-breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .bb-breadcrumb a:hover {
  color: var(--ice);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  padding-top: clamp(18px, 3vw, 32px);
  padding-bottom: clamp(32px, 4vw, 56px);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 5.2vw, 62px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  max-width: 17ch;
}

.page-faq .faq-hero__text {
  margin-top: 20px;
  max-width: 56ch;
  color: var(--mist);
  font-size: clamp(15px, 1.15vw, 17px);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 520px;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__stats li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-stat__num {
  flex: 0 0 auto;
  min-width: 82px;
  font-family: var(--mono-font);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.1;
  color: var(--amber);
  letter-spacing: -.01em;
}

.page-faq .faq-stat__label {
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
}

.page-faq .faq-hero__side {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--orange);
  padding: clamp(18px, 2.4vw, 28px);
  background: linear-gradient(180deg, rgba(14, 42, 71, .88), rgba(7, 24, 46, .62));
}

.page-faq .faq-hero__side-title {
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-faq .faq-hero__side-list {
  list-style: none;
  counter-reset: side;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-hero__side-list li {
  counter-increment: side;
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  color: var(--paper);
  line-height: 1.55;
}

.page-faq .faq-hero__side-list li::before {
  content: counter(side, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--orange);
}

.page-faq .bb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--body-font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 11px 22px;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

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

.page-faq .bb-btn--primary:hover,
.page-faq .bb-btn--primary:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
}

.page-faq .bb-btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line-strong);
}

.page-faq .bb-btn--ghost:hover,
.page-faq .bb-btn--ghost:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .bb-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 六步进度带 ---------- */
.page-faq .faq-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail li {
  flex: 0 0 auto;
  min-width: 136px;
  border-right: 1px solid var(--line);
}

.page-faq .faq-rail li:last-child {
  border-right: 0;
}

.page-faq .faq-rail a {
  display: block;
  padding: 15px 16px 17px;
  text-decoration: none;
  color: var(--mist);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-rail a:hover,
.page-faq .faq-rail a:focus-visible {
  color: var(--paper);
  background: rgba(86, 199, 242, .10);
}

.page-faq .faq-rail a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-rail__num {
  display: block;
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-faq .faq-rail__label {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.35;
}

/* ---------- 六步清单 ---------- */
.page-faq .faq-steps {
  background: linear-gradient(180deg, rgba(14, 42, 71, .35), transparent 70%);
}

.page-faq .faq-steps__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-steps__list {
  min-width: 0;
}

.page-faq .faq-acc {
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel);
  background: rgba(14, 42, 71, .45);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-acc + .faq-acc {
  margin-top: 8px;
}

.page-faq .faq-acc[open] {
  border-left-color: var(--orange);
  background: rgba(23, 63, 95, .58);
}

.page-faq .faq-acc summary {
  display: flex;
  align-items: baseline;
  gap: clamp(10px, 1.6vw, 18px);
  padding: 15px clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-acc summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-acc summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--mono-font);
  font-size: 18px;
  line-height: 1;
  color: var(--ice);
}

.page-faq .faq-acc[open] summary::after {
  content: "\2212";
  color: var(--orange);
}

.page-faq .faq-acc__num {
  flex: 0 0 auto;
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-faq .faq-acc__title {
  font-size: clamp(15px, 1.4vw, 17px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-acc__tag {
  display: none;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .faq-acc__body {
  padding: 14px clamp(14px, 2vw, 20px) 18px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-2);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 46px;
  height: 46px;
  border-left: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  pointer-events: none;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist);
}

/* ---------- 打不开排查 ---------- */
.page-faq .faq-sym {
  border: 1px solid var(--line-strong);
  background: rgba(7, 24, 46, .4);
}

.page-faq .faq-sym__row {
  display: grid;
  gap: 6px;
  padding: 16px clamp(14px, 2vw, 22px);
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-sym__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-sym__row:hover {
  border-left-color: var(--ice);
  background: rgba(86, 199, 242, .06);
}

.page-faq .faq-sym__what {
  font-weight: 700;
  font-size: 15px;
  color: var(--paper);
  line-height: 1.5;
}

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

/* ---------- 登录异常 ---------- */
.page-faq .faq-login {
  background:
    radial-gradient(90% 70% at 12% 0%, rgba(61, 44, 107, .30), transparent 62%),
    var(--ink);
}

.page-faq .bb-filter {
  list-style: none;
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .bb-filter__btn {
  font-family: var(--body-font);
  font-size: 13px;
  font-weight: 600;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-strong);
  padding: 8px 16px;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .bb-filter__btn:hover {
  color: var(--paper);
  border-color: var(--ice);
}

.page-faq .bb-filter__btn[aria-pressed="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .bb-filter__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-quads {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-faq .faq-quad {
  --faq-accent: var(--ice);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 28px) clamp(16px, 2vw, 24px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 42, 71, .78), rgba(7, 24, 46, .58));
  overflow: hidden;
}

.page-faq .faq-quad[hidden] {
  display: none;
}

.page-faq .faq-quad::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--faq-accent);
  opacity: .9;
}

.page-faq .faq-quad--code {
  --faq-accent: var(--cyan);
}

.page-faq .faq-quad--net {
  --faq-accent: var(--ice);
}

.page-faq .faq-quad--ver {
  --faq-accent: var(--amber);
}

.page-faq .faq-quad--acct {
  --faq-accent: var(--orange);
}

.page-faq .faq-quad__code {
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--faq-accent);
}

.page-faq .faq-quad h3 {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 800;
  line-height: 1.32;
  color: var(--paper);
}

.page-faq .faq-quad__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-faq .faq-quad__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-quad__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 6px;
  height: 6px;
  background: var(--faq-accent);
  opacity: .75;
}

/* ---------- 平板端 ---------- */
.page-faq .faq-tablet {
  background: linear-gradient(180deg, transparent, rgba(23, 63, 95, .30) 45%, transparent);
}

.page-faq .faq-split {
  display: grid;
  gap: clamp(22px, 3.2vw, 44px);
}

.page-faq .faq-split h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 2.9vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
}

.page-faq .faq-split__text {
  margin-top: 14px;
  color: var(--mist);
  font-size: clamp(15px, 1.1vw, 16.5px);
  max-width: 56ch;
}

/* ---------- 编号核对清单 ---------- */
.page-faq .faq-check {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-check li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-check__n {
  font-family: var(--mono-font);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
  padding-top: 3px;
}

.page-faq .faq-check strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  line-height: 1.45;
}

.page-faq .faq-check p {
  margin-top: 5px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-check--wide {
  max-width: 100%;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  background: linear-gradient(180deg, transparent, rgba(7, 24, 46, .9));
}

.page-faq .faq-contact__panel {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--orange);
  background:
    linear-gradient(135deg, rgba(255, 107, 26, .12), transparent 55%),
    rgba(14, 42, 71, .62);
  padding: clamp(24px, 4vw, 48px);
}

.page-faq .faq-contact h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
}

.page-faq .faq-contact__text {
  margin-top: 14px;
  color: var(--mist);
  font-size: clamp(15px, 1.1vw, 16.5px);
  max-width: 54ch;
}

.page-faq .faq-mail {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  margin-top: clamp(20px, 2.6vw, 28px);
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(255, 182, 92, .45);
}

.page-faq .faq-mail__key {
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-mail__val {
  font-family: var(--mono-font);
  font-size: clamp(14px, 1.7vw, 19px);
  color: var(--amber);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 52ch;
}

.page-faq .faq-contact__aside {
  border-left: 1px solid var(--line-strong);
  padding-left: clamp(16px, 2.4vw, 28px);
}

.page-faq .faq-contact__aside-title {
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-contact__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-contact__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 1px;
  background: var(--orange);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-acc__tag {
    display: inline;
  }

  .page-faq .faq-rail li {
    flex: 1 1 0;
    min-width: 0;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-quads {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-sym__row {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.5fr);
    align-items: baseline;
    gap: 6px 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: center;
  }

  .page-faq .faq-contact__panel {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-steps__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-figure {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (max-width: 599px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-contact__aside {
    border-left: 0;
    border-top: 1px solid var(--line-strong);
    padding-left: 0;
    padding-top: 20px;
  }

  .page-faq .faq-stat__num {
    min-width: 70px;
  }

  .page-faq .faq-acc summary {
    flex-wrap: wrap;
  }

  .page-faq .faq-acc summary::after {
    position: absolute;
    right: 14px;
  }

  .page-faq .faq-acc summary {
    position: relative;
    padding-right: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .bb-btn,
  .page-faq .faq-acc,
  .page-faq .faq-sym__row,
  .page-faq .bb-filter__btn,
  .page-faq .faq-rail a {
    transition: none;
  }
}