/* ========== FAQ / 帮助问答页面专属 ========== */
.page-faq {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---- Hero ---- */
.faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--ink) 0%, var(--slate) 100%);
  color: var(--paper);
  padding: 1.75rem 1.25rem 4rem;
}

.faq-hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--content-max);
  margin: 0 auto;
}

.faq-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.faq-hero .breadcrumb a {
  color: rgba(245, 240, 230, 0.7);
  text-decoration: none;
  transition: color var(--transition);
}

.faq-hero .breadcrumb a:hover {
  color: var(--warm-orange);
}

.faq-hero .breadcrumb__separator {
  color: rgba(245, 240, 230, 0.4);
}

.faq-hero .breadcrumb [aria-current="page"] {
  color: var(--warm-orange);
}

.faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.16em;
  color: var(--warm-orange);
  margin: 0 0 0.6rem;
}

.faq-hero__eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--orange);
}

.faq-hero h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 0.9rem;
  color: var(--white);
}

.faq-hero__lead {
  font-size: 0.98rem;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.85);
  max-width: 40rem;
  margin-bottom: 1.4rem;
}

.faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  border-top: 1px solid rgba(245, 240, 230, 0.2);
  padding-top: 1.2rem;
}

.faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.faq-hero__stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.faq-hero__stat-label {
  font-size: 0.8rem;
  color: rgba(245, 240, 230, 0.6);
}

.faq-hero__curve {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  width: 100%;
  height: 50px;
  z-index: 1;
  pointer-events: none;
}

/* 入场动效 */
@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.faq-hero__inner > * {
  animation: faqFadeIn 0.5s ease both;
}

.faq-hero__inner > *:nth-child(2) {
  animation-delay: 0.05s;
}

.faq-hero__inner > *:nth-child(3) {
  animation-delay: 0.1s;
}

.faq-hero__inner > *:nth-child(4) {
  animation-delay: 0.15s;
}

.faq-hero__inner > *:nth-child(5) {
  animation-delay: 0.2s;
}

/* ---- 目录 ---- */
.faq-layout.container {
  padding: 0 1.25rem 3rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.faq-toc {
  position: relative;
  margin: -1.8rem 0 2rem;
  background: var(--slate);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  color: var(--white);
  box-shadow: var(--shadow);
  z-index: 3;
}

.faq-toc__seal {
  display: none;
}

.faq-toc__label {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--warm-orange);
  margin: 0 0 0.7rem;
}

.faq-toc__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 0.6rem;
  padding: 0;
}

.faq-toc__link {
  display: block;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.88rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.faq-toc__link:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

.faq-toc__tip {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  margin: 0.8rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 0.7rem;
}

/* ---- 主答疑区 ---- */
.faq-main {
  min-width: 0;
}

.faq-group {
  scroll-margin-top: 1.5rem;
  margin-bottom: 3.2rem;
}

.faq-group__header {
  margin-bottom: 1.2rem;
}

.faq-group__tag {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--slate);
  font-weight: 600;
  margin-bottom: 0.5rem;
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--slate);
  border-radius: 999px;
}

.faq-group h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--ink);
  margin: 0 0 0.4rem;
  position: relative;
  padding-left: 0.8rem;
}

.faq-group h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.25rem;
  bottom: 0.2rem;
  width: 4px;
  border-radius: 2px;
  background: var(--slate);
}

.faq-group__desc {
  color: var(--deep-gray);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}

.faq-group__figure {
  margin: 1.2rem 0;
}

.faq-group__image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--light-gray);
  box-shadow: 0 2px 12px rgba(43, 43, 43, 0.05);
  object-fit: cover;
}

.faq-group__caption {
  font-size: 0.8rem;
  color: #666666;
  margin-top: 0.45rem;
  text-align: center;
}

/* 手风琴 */
.faq-accordion {
  display: grid;
  gap: 0.7rem;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-left: 3px solid var(--slate);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:hover {
  box-shadow: 0 4px 16px rgba(43, 43, 43, 0.06);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 0.95rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  transition: color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--light-gray);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--orange);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.faq-item[open] summary::after {
  content: "−";
  background: var(--orange);
  color: var(--white);
  border-color: var(--orange);
  transform: rotate(180deg);
}

.faq-item__body {
  padding: 0 1.1rem 1rem;
  color: var(--deep-gray);
  font-size: 0.92rem;
  line-height: 1.7;
}

.faq-item__body p {
  margin: 0 0 0.5rem;
}

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

/* 分组色调节奏 */
.faq-group--start .faq-group__tag {
  color: var(--slate);
  border-color: var(--slate);
}

.faq-group--start h2::before {
  background: var(--slate);
}

.faq-group--feature .faq-item {
  border-left-color: var(--blue);
}

.faq-group--feature .faq-group__tag {
  color: var(--blue);
  border-color: var(--blue);
}

.faq-group--feature h2::before {
  background: var(--blue);
}

.faq-group--data .faq-item {
  border-left-color: var(--orange);
}

.faq-group--data .faq-group__tag {
  color: var(--orange);
  border-color: var(--orange);
}

.faq-group--data h2::before {
  background: var(--orange);
}

/* 联系支持区 */
.faq-group--support {
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 14px;
  padding: 2rem 1.5rem;
  text-align: center;
}

.faq-group--support .faq-group__header {
  margin-bottom: 1rem;
}

.faq-group--support h2::before {
  display: none;
}

.faq-group--support .faq-group__tag {
  color: var(--slate);
  border-color: var(--slate);
}

/* ---- 小屏微调 ---- */
@media (max-width: 767px) {
  .faq-hero h1 {
    font-size: 1.65rem;
  }

  .faq-hero__lead {
    font-size: 0.92rem;
  }
}

/* ---- 桌面端 ---- */
@media (min-width: 768px) {
  .faq-hero {
    padding: 2.5rem 2rem 4.5rem;
  }

  .faq-hero h1 {
    font-size: 2.6rem;
  }

  .faq-hero__lead {
    font-size: 1.05rem;
    max-width: 44rem;
  }

  .faq-hero__stats {
    gap: 2rem 3rem;
  }

  .faq-hero__stat-num {
    font-size: 1.8rem;
  }

  .faq-toc {
    position: sticky;
    top: 2rem;
    margin: -2.2rem 0 0;
    padding: 1.5rem 1.4rem;
  }

  .faq-toc__seal {
    display: flex;
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 36px;
    height: 36px;
    border: 2px solid rgba(255, 158, 0, 0.7);
    border-radius: 6px;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: rgba(255, 158, 0, 0.8);
    background: rgba(255, 158, 0, 0.06);
  }

  .faq-toc__list {
    flex-direction: column;
    gap: 0.35rem;
  }

  .faq-toc__link {
    font-size: 0.92rem;
    padding: 0.55rem 0.95rem;
  }

  .faq-layout.container {
    display: grid;
    grid-template-columns: 230px 1fr;
    gap: 2.2rem;
    align-items: start;
    padding: 0 2rem 4rem;
  }

  .faq-group {
    margin-bottom: 3.8rem;
  }

  .faq-group__figure {
    margin: 1.4rem 0 1.6rem;
  }

  .faq-group h2 {
    font-size: 1.8rem;
  }

  .faq-group__desc {
    font-size: 0.95rem;
  }

  .faq-item summary {
    font-size: 1rem;
    padding: 1.05rem 1.3rem;
  }

  .faq-item__body {
    font-size: 0.95rem;
    padding: 0 1.3rem 1.15rem;
  }

  .faq-group--support {
    padding: 2.5rem 2rem;
  }
}

@media (min-width: 1024px) {
  .faq-layout.container {
    grid-template-columns: 250px 1fr;
    gap: 3rem;
  }

  .faq-group--start .faq-group__image {
    max-width: 400px;
  }

  .faq-group__figure--data {
    margin-left: 3rem;
    max-width: 500px;
  }
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  .faq-hero__inner > * {
    animation: none;
  }

  .faq-item summary::after,
  .faq-toc__link {
    transition: none;
  }
}