/* ==========================================================
   页面作用域：支持中心 /support/  faq
   所有选择器均限定在 .page-faq 内，不影响其他页面
   ========================================================== */
.page-faq {
  --faq-clip-panel: polygon(0 16px, calc(100% - 32px) 0, 100% calc(100% - 16px), 20px 100%);
  --faq-clip-sm: polygon(0 8px, calc(100% - 20px) 0, 100% calc(100% - 8px), 12px 100%);
  --faq-clip-img: polygon(0 10px, calc(100% - 28px) 0, 100% calc(100% - 12px), 16px 100%);
  --faq-stripe: repeating-linear-gradient(
    -45deg,
    rgba(255, 79, 0, 0.06) 0 10px,
    transparent 10px 20px
  );
  background: var(--ff-deep);
  color: var(--ff-text);
}

/* ---------- 通用标签 ---------- */
.page-faq .faq-kicker {
  display: inline-block;
  margin: 0 0 18px;
  padding-left: 12px;
  border-left: 3px solid var(--ff-orange);
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ff-orange);
}

/* ---------- Hero 首屏 ---------- */
.page-faq .page-faq-hero {
  position: relative;
  padding: 36px 0 56px;
  overflow: hidden;
}

.page-faq .page-faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 76%;
  height: 5px;
  background: linear-gradient(90deg, transparent, var(--ff-orange) 40%, var(--ff-orange));
}

.page-faq .page-faq-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -80px;
  width: 460px;
  height: 160%;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 18px,
    rgba(255, 79, 0, 0.08) 18px 20px
  );
  transform: skewX(-15deg);
  pointer-events: none;
  z-index: 0;
}

.page-faq .page-faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-breadcrumb {
  margin-bottom: 36px;
}

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

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero-copy::before {
  content: "";
  display: block;
  width: 92px;
  height: 6px;
  margin-bottom: 22px;
  background: linear-gradient(90deg, var(--ff-orange), var(--ff-purple));
}

.page-faq .faq-hero-title {
  margin: 0 0 20px;
  font-size: clamp(30px, 5vw, 54px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ff-white);
  max-width: 780px;
}

.page-faq .faq-hero-desc {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ff-muted);
  max-width: 560px;
}

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

.page-faq .faq-btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--ff-white);
}

.page-faq .faq-btn-ghost:hover,
.page-faq .faq-btn-ghost:focus-visible {
  border-color: var(--ff-orange);
  color: var(--ff-orange);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-faq .faq-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-hero-stat-num {
  font-family: var(--ff-mono);
  font-size: 24px;
  font-weight: 900;
  font-style: italic;
  line-height: 1;
  color: var(--ff-orange);
}

.page-faq .faq-hero-stat-label {
  font-size: 12px;
  color: var(--ff-muted);
}

.page-faq .faq-hero-visual {
  overflow: hidden;
  max-width: 520px;
}

.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: var(--faq-clip-img);
  border: 1px solid rgba(255, 79, 0, 0.5);
  box-shadow: var(--ff-glow);
}

/* ---------- 热门问题主体区 ---------- */
.page-faq .faq-main {
  padding: 64px 0 40px;
  background:
    var(--faq-stripe),
    linear-gradient(180deg, #101729 0%, var(--ff-deep) 240px);
}

.page-faq .faq-main-head {
  margin-bottom: 36px;
}

.page-faq .faq-main-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  font-style: italic;
  color: var(--ff-white);
}

.page-faq .faq-main-desc {
  margin: 0;
  font-size: 15px;
  color: var(--ff-muted);
}

/* ---------- 双列布局：索引 + 答案 ---------- */
.page-faq .faq-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

/* --- 左列：问题索引 --- */
.page-faq .faq-index {
  background: linear-gradient(150deg, #141c2e 0%, var(--ff-deep) 100%);
  border: 1px solid rgba(255, 79, 0, 0.28);
  clip-path: var(--faq-clip-panel);
  padding: 26px 22px;
}

.page-faq .faq-index-title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ff-orange);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faqIndex;
}

.page-faq .faq-index-list li {
  counter-increment: faqIndex;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-faq .faq-index-list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-index-list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 12px 6px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ff-text);
  text-decoration: none;
  transition: color var(--ff-transition), padding-left var(--ff-transition);
}

.page-faq .faq-index-list a::before {
  content: counter(faqIndex, decimal-leading-zero);
  flex-shrink: 0;
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ff-orange);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--ff-orange);
  padding-left: 12px;
}

.page-faq .faq-index-callout {
  margin-top: 20px;
  padding: 16px 14px;
  border-left: 3px solid var(--ff-blue);
  background: rgba(0, 180, 216, 0.08);
}

.page-faq .faq-index-callout-title {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ff-white);
}

.page-faq .faq-index-callout p:last-child {
  margin: 0;
  font-size: 13px;
  color: var(--ff-muted);
}

.page-faq .faq-index-callout a {
  color: var(--ff-blue);
  text-decoration: none;
}

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

/* --- 右列：折叠答案 --- */
.page-faq .faq-answers {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .faq-item {
  background: var(--ff-paper);
  color: var(--ff-charcoal);
  border-left: 4px solid var(--ff-orange);
  clip-path: var(--faq-clip-sm);
  box-shadow: var(--ff-shadow);
}

.page-faq .faq-item[open] .faq-question {
  background: rgba(255, 79, 0, 0.08);
}

.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  transition: background var(--ff-transition);
}

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

.page-faq .faq-question::marker {
  content: none;
}

.page-faq .faq-question-num {
  flex-shrink: 0;
  width: 28px;
  text-align: right;
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 900;
  color: var(--ff-orange);
}

.page-faq .faq-question-text {
  flex: 1;
}

.page-faq .faq-question-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  font-family: var(--ff-mono);
  font-size: 20px;
  color: var(--ff-orange);
  border: 1px solid var(--ff-orange);
  transition: transform var(--ff-transition), background var(--ff-transition), color var(--ff-transition);
}

.page-faq .faq-question:hover .faq-question-toggle,
.page-faq .faq-item[open] .faq-question-toggle {
  background: var(--ff-orange);
  color: var(--ff-white);
}

.page-faq .faq-item[open] .faq-question-toggle {
  transform: rotate(45deg);
}

.page-faq .faq-answer {
  padding: 4px 16px 20px 36px;
  font-size: 15px;
  line-height: 1.75;
  border-top: 1px dashed rgba(30, 41, 59, 0.25);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(255, 79, 0, 0.03) 0 8px,
    transparent 8px 16px
  );
}

.page-faq .faq-item[open] .faq-answer {
  animation: faqFadeIn 0.35s var(--ff-ease);
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-browser-img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  margin-top: 18px;
  clip-path: var(--faq-clip-sm);
  border: 1px solid rgba(30, 41, 59, 0.2);
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 联系支持团队 ---------- */
.page-faq .faq-contact {
  position: relative;
  padding: 60px 0 72px;
  border-top: 1px solid rgba(255, 79, 0, 0.3);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ff-orange) 0%, transparent 100%);
}

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

.page-faq .faq-contact-heading {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 900;
  font-style: italic;
  color: var(--ff-white);
}

.page-faq .faq-contact-desc {
  margin: 0;
  max-width: 540px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ff-muted);
}

.page-faq .faq-contact-cards {
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact-card {
  display: grid;
  grid-template-columns: 40px 1fr;
  grid-template-areas:
    "icon label"
    "icon value";
  gap: 2px 12px;
  padding: 16px 18px;
  background: linear-gradient(145deg, #141d32 0%, var(--ff-deep) 100%);
  border: 1px solid rgba(255, 79, 0, 0.35);
  clip-path: var(--faq-clip-sm);
  color: var(--ff-text);
  text-decoration: none;
  transition: border-color var(--ff-transition), box-shadow var(--ff-transition);
}

.page-faq a.faq-contact-card:hover,
.page-faq a.faq-contact-card:focus-visible {
  border-color: var(--ff-orange);
  box-shadow: var(--ff-glow);
}

.page-faq .faq-contact-icon {
  grid-area: icon;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-style: normal;
  font-size: 18px;
  color: var(--ff-orange);
  background: rgba(255, 79, 0, 0.15);
  border: 1px solid rgba(255, 79, 0, 0.4);
}

.page-faq .faq-contact-label {
  grid-area: label;
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ff-muted);
}

.page-faq .faq-contact-value {
  grid-area: value;
  font-size: 15px;
  font-weight: 700;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.page-faq .faq-contact-address .faq-contact-value {
  font-weight: 400;
  line-height: 1.6;
}

/* ==========================================================
   响应式：桌面端栅格
   ========================================================== */
@media (max-width: 639px) {
  .page-faq .faq-hero-visual {
    order: 2;
    margin: 0 auto;
  }

  .page-faq .faq-hero-copy {
    order: 1;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-contact-card {
    grid-template-columns: 48px 120px 1fr;
    grid-template-areas: "icon label value";
    align-items: center;
    gap: 0 16px;
    padding: 18px 20px;
  }

  .page-faq .faq-contact-icon {
    width: 48px;
    height: 48px;
  }
}

@media (min-width: 992px) {
  .page-faq .page-faq-hero {
    padding: 48px 0 72px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) 420px;
    align-items: center;
    gap: 56px;
  }

  .page-faq .faq-hero-desc {
    font-size: 17px;
  }

  .page-faq .faq-main {
    padding: 88px 0 48px;
  }

  .page-faq .faq-grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 40px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--ff-header-h) + 24px);
  }

  .page-faq .faq-answers {
    gap: 18px;
  }

  .page-faq .faq-question {
    padding: 20px 22px;
    font-size: 17px;
  }

  .page-faq .faq-answer {
    padding: 6px 24px 24px 60px;
    font-size: 15px;
  }

  .page-faq .faq-contact {
    padding: 72px 0 88px;
  }

  .page-faq .faq-contact-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 480px);
    align-items: center;
    gap: 80px;
  }
}