.page-faq {
  --faq-rail-w: 258px;
  --faq-hair: rgba(244, 247, 242, .12);
  --faq-muted: rgba(244, 247, 242, .74);
  padding-top: var(--h-header);
  background: var(--c-night);
  color: var(--c-line);
  font-family: var(--f-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 48px) 0 clamp(44px, 7vw, 82px);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(200, 255, 61, .12), transparent 58%),
    linear-gradient(158deg, var(--c-stand) 0%, var(--c-night) 58%, #0A2A20 100%);
  border-bottom: 1px solid var(--faq-hair);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(244, 247, 242, .05) 0 1px, transparent 1px 36px);
  -webkit-mask-image: linear-gradient(to left, #000, transparent 72%);
  mask-image: linear-gradient(to left, #000, transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  color: var(--c-mist);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(143, 183, 168, .5);
}

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

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--c-lime);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--c-line);
}

.page-faq .faq-hero .eyebrow {
  margin: 22px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(38px, 7.2vw, 84px);
  line-height: .96;
  letter-spacing: -.035em;
  color: var(--c-line);
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--c-lime);
}

.page-faq .faq-hero-lead {
  max-width: 40em;
  margin: 22px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--faq-muted);
}

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

.page-faq .faq-wire {
  position: relative;
  max-width: 320px;
  margin: 0 auto;
  padding: 10px;
}

.page-faq .faq-wire::before {
  content: "";
  position: absolute;
  inset: 8% 0 6%;
  background: radial-gradient(circle at 50% 45%, rgba(200, 255, 61, .22), transparent 68%);
  filter: blur(6px);
  pointer-events: none;
}

.page-faq .faq-wire svg {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .wire-frame rect {
  fill: none;
  stroke: rgba(244, 247, 242, .34);
  stroke-width: 2;
}

.page-faq .wire-soft rect {
  fill: rgba(244, 247, 242, .1);
}

.page-faq .wire-lime rect,
.page-faq .wire-lime circle {
  fill: var(--c-lime);
}

.page-faq .wire-orange rect {
  fill: var(--c-orange);
}

/* ---------- 主体分屏 ---------- */
.page-faq .faq-body {
  max-width: var(--w-container);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 68px) var(--pad-x) clamp(56px, 8vw, 96px);
  display: grid;
  gap: 34px;
}

.page-faq .rail-inner {
  display: grid;
  gap: 18px;
}

.page-faq .rail-label {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-mist);
}

.page-faq .rail-nav {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .rail-nav a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  font-size: 14px;
  color: rgba(244, 247, 242, .74);
  text-decoration: none;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}

.page-faq .rail-nav a:hover,
.page-faq .rail-nav a:focus-visible {
  color: var(--c-line);
  background: rgba(200, 255, 61, .09);
  border-left-color: var(--c-lime);
}

.page-faq .rail-nav .mono {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-orange);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  appearance: none;
  cursor: pointer;
  padding: 7px 13px;
  border: 1px solid rgba(244, 247, 242, .2);
  border-radius: 999px;
  background: transparent;
  font: inherit;
  font-size: 12.5px;
  color: rgba(244, 247, 242, .76);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-faq .filter-btn:hover {
  color: var(--c-line);
  border-color: rgba(200, 255, 61, .5);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-stand);
  font-weight: 700;
}

.page-faq .glass-card {
  border: 1px solid rgba(200, 255, 61, .22);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(29, 58, 50, .85), rgba(8, 35, 28, .62));
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lift);
}

.page-faq .rail-help {
  padding: 16px 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--faq-muted);
}

.page-faq .rail-help-label {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-lime);
}

.page-faq .rail-help p {
  margin: 0;
}

.page-faq .rail-help-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 42, .45);
}

.page-faq .rail-help-link:hover,
.page-faq .rail-help-link:focus-visible {
  color: var(--c-line);
  border-bottom-color: var(--c-line);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-bottom: clamp(36px, 5vw, 56px);
  margin-bottom: clamp(30px, 4.5vw, 52px);
  border-bottom: 1px solid var(--faq-hair);
  scroll-margin-top: calc(var(--h-header) + 22px);
}

.page-faq .faq-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-section .eyebrow {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-orange);
}

.page-faq .faq-section h2 {
  margin: 12px 0 0;
  font-family: var(--f-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--c-line);
}

.page-faq .faq-lead {
  max-width: 46ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-muted);
}

/* ---------- 三步入口 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 16px;
  margin-top: 28px;
  padding-bottom: 8px;
}

.page-faq .faq-step {
  padding: 22px 20px 20px;
  border: 1px solid var(--faq-hair);
  border-top: 2px solid rgba(200, 255, 61, .6);
  border-radius: var(--r-md);
  background: linear-gradient(172deg, rgba(29, 58, 50, .55), rgba(11, 15, 14, .55));
  transition: border-color .2s ease, background .2s ease;
}

.page-faq .faq-step:hover {
  border-color: rgba(200, 255, 61, .38);
  background: linear-gradient(172deg, rgba(29, 58, 50, .78), rgba(11, 15, 14, .6));
}

.page-faq .faq-step-num {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  color: var(--c-orange);
  letter-spacing: -.02em;
}

.page-faq .faq-step h3 {
  margin: 14px 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-line);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-step-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .35);
}

.page-faq .faq-step-link:hover,
.page-faq .faq-step-link:focus-visible {
  color: var(--c-line);
  border-bottom-color: var(--c-line);
}

/* ---------- 苹果版步骤 ---------- */
.page-faq .ios-grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

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

.page-faq .media--4x3,
.page-faq .media--3x2 {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
}

.page-faq .media--4x3 {
  aspect-ratio: 4 / 3;
}

.page-faq .media--3x2 {
  aspect-ratio: 3 / 2;
}

.page-faq .media--4x3 img,
.page-faq .media--3x2 img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-mist);
}

.page-faq .ios-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ios;
  display: grid;
  gap: 18px;
}

.page-faq .ios-steps li {
  position: relative;
  padding-left: 46px;
}

.page-faq .ios-steps li::before {
  counter-increment: ios;
  content: counter(ios, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--c-lime);
  color: var(--c-stand);
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .ios-steps strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-line);
}

.page-faq .ios-steps p {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-tip {
  margin-top: 24px;
  padding: 16px 18px 16px 20px;
  border-left: 3px solid var(--c-orange);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-tip-label {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-orange);
}

.page-faq .faq-tip p {
  margin: 0;
}

/* ---------- 收藏入口 ---------- */
.page-faq .saved-grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-faq .saved-tips {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .saved-tips li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px dashed rgba(244, 247, 242, .16);
}

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

.page-faq .saved-num {
  font-size: 13px;
  line-height: 1.9;
  color: var(--c-orange);
  letter-spacing: .04em;
}

.page-faq .saved-tips strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--c-line);
}

.page-faq .saved-tips p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .saved-copy .btn {
  margin-top: 22px;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: 26px;
}

.page-faq .qa-item {
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
  background: rgba(29, 58, 50, .26);
  transition: border-color .2s ease, background .2s ease;
}

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

.page-faq .qa-item[open] {
  border-color: rgba(200, 255, 61, .45);
  background: rgba(29, 58, 50, .5);
}

.page-faq .qa-item summary {
  position: relative;
  padding: 16px 52px 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-line);
}

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

.page-faq .qa-item summary:hover {
  color: var(--c-lime);
}

.page-faq .qa-item summary:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .qa-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-lime);
}

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

.page-faq .qa-answer {
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-muted);
}

.page-faq .qa-answer p {
  margin: 0;
}

.page-faq .qa-answer .tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 106, 42, .16);
  border: 1px solid rgba(255, 106, 42, .4);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-orange);
}

/* ---------- 联络 ---------- */
.page-faq .contact-grid {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-faq .contact-copy h3 {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-line);
}

.page-faq .contact-how {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .contact-how li::marker {
  color: var(--c-lime);
  font-family: var(--f-mono);
}

.page-faq .link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .link-row a {
  padding: 7px 13px;
  border: 1px solid rgba(244, 247, 242, .18);
  border-radius: 999px;
  font-size: 12.5px;
  color: rgba(244, 247, 242, .8);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .link-row a:hover,
.page-faq .link-row a:focus-visible {
  color: var(--c-lime);
  border-color: rgba(200, 255, 61, .55);
}

.page-faq .contact-card {
  padding: 20px;
}

.page-faq .contact-card-title {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-lime);
}

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

.page-faq .contact-rows li {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(244, 247, 242, .1);
}

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

.page-faq .contact-key {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

.page-faq .contact-val {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--c-line);
  word-break: break-word;
}

.page-faq .contact-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .contact-btn {
  margin-top: 16px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-step:nth-child(2) {
    margin-top: 20px;
  }

  .page-faq .faq-step:nth-child(3) {
    margin-top: 40px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
    gap: 48px;
  }

  .page-faq .faq-wire {
    max-width: 100%;
    margin: 0;
  }

  .page-faq .ios-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 34px;
    align-items: start;
  }

  .page-faq .saved-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 34px;
    align-items: start;
  }

  .page-faq .contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .rail-inner {
    position: sticky;
    top: calc(var(--h-header) + 26px);
  }
}

@media (max-width: 979px) {
  .page-faq .rail-nav {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .page-faq .rail-nav a {
    border-left: 0;
    border: 1px solid rgba(244, 247, 242, .16);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .rail-nav a,
  .page-faq .filter-btn,
  .page-faq .qa-item,
  .page-faq .faq-step,
  .page-faq .link-row a {
    transition: none;
  }
}