/* ===== 页面专属：FAQ ===== */
.page-faq {
  --faq-gap: 28px;
  --faq-radius: 8px;
  --faq-icon-size: 28px;
  position: relative;
  background-color: var(--color-light, #F5F5F5);
  color: var(--color-black, #111111);
  font-family: var(--font-body, 'Inter', 'Helvetica Neue', sans-serif);
  overflow-x: hidden;
}

/* ---- Hero 区 ---- */
.faq__hero {
  position: relative;
  width: 100%;
  height: 340px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq__hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.faq__hero-glass {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 75, 135, 0.55) 0%, rgba(0, 75, 135, 0.25) 60%, rgba(26, 26, 26, 0.5) 100%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.faq__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: var(--max-width, 1280px);
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.85rem;
  letter-spacing: 0.3px;
}

.breadcrumb__link {
  color: var(--color-gold, #FFD700);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s;
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  opacity: 0.8;
  text-decoration: underline;
}

.breadcrumb__sep {
  color: rgba(255, 255, 255, 0.5);
  font-weight: 300;
}

.breadcrumb__current {
  color: var(--color-white, #FFFFFF);
  font-weight: 400;
  opacity: 0.85;
}

.faq__title {
  font-family: var(--font-heading, 'Helvetica Neue', 'Arial', sans-serif);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2rem, 6vw, 3.6rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 10px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.5px;
}

.faq__subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.5;
  font-weight: 400;
}

.coordinate--header {
  position: absolute;
  bottom: 12px;
  right: 20px;
  z-index: 3;
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--font-mono, 'Courier New', monospace);
  font-size: 0.75rem;
  letter-spacing: 1px;
  pointer-events: none;
}

/* ---- 问题目录 ---- */
.faq__dir {
  position: relative;
  z-index: 2;
  max-width: var(--max-width, 1280px);
  margin: -28px auto 0;
  padding: 18px 28px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 75, 135, 0.15);
  border-radius: var(--faq-radius, 8px);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.faq__dir-label {
  flex-shrink: 0;
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.faq__dir-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.faq__dir-link {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-blue, #004B87);
  color: var(--color-white, #FFFFFF);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: background 0.2s, transform 0.15s;
  letter-spacing: 0.3px;
}

.faq__dir-link:hover,
.faq__dir-link:focus-visible {
  background: var(--color-red, #E30613);
  transform: translateY(-1px);
}

/* ---- 主内容网格 ---- */
.faq__main {
  max-width: var(--max-width, 1280px);
  margin: 40px auto 0;
  padding: 0 20px 60px;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap, 28px);
  position: relative;
  z-index: 2;
}

/* ---- 每个板块 ---- */
.faq__section {
  background: var(--color-white, #FFFFFF);
  border-radius: var(--faq-radius, 8px);
  padding: 24px 20px 28px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  border-left: 4px solid var(--color-blue, #004B87);
  transition: box-shadow 0.25s;
}

.faq__section:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
}

.faq__section--panel {
  border-left-color: var(--color-red, #E30613);
}

.faq__section--download {
  border-left-color: var(--color-blue, #004B87);
}

.faq__section--member {
  border-left-color: var(--color-gold, #FFD700);
}

.faq__section--browser {
  border-left-color: var(--color-dark, #1A1A1A);
}

.faq__section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(0, 0, 0, 0.04);
}

.faq__section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--faq-icon-size, 28px);
  height: var(--faq-icon-size, 28px);
  color: var(--color-blue, #004B87);
  flex-shrink: 0;
}

.faq__section--panel .faq__section-icon {
  color: var(--color-red, #E30613);
}

.faq__section--member .faq__section-icon {
  color: var(--color-gold, #FFD700);
}

.faq__section--browser .faq__section-icon {
  color: var(--color-dark, #1A1A1A);
}

.faq__section-title {
  font-family: var(--font-heading, 'Helvetica Neue', 'Arial', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 1.4rem;
  margin: 0;
  color: var(--color-black, #111111);
  flex: 1;
}

.faq__section-header .data-label {
  font-size: 0.7rem;
  padding: 3px 10px;
  background: rgba(255, 215, 0, 0.12);
  border-radius: 20px;
  flex-shrink: 0;
}

/* ---- 资料下载区配图 ---- */
.faq__download-visual {
  margin-bottom: 20px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--color-light, #F5F5F5);
}

.faq__download-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}

/* ---- 手风琴列表 ---- */
.faq__items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq__item {
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 6px;
  overflow: hidden;
  background: var(--color-light, #F5F5F5);
  transition: border-color 0.2s;
}

.faq__item[open] {
  border-color: rgba(0, 75, 135, 0.2);
  background: var(--color-white, #FFFFFF);
}

.faq__question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--color-black, #111111);
  transition: background 0.2s, color 0.2s;
  user-select: none;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::marker {
  display: none;
  content: "";
}

.faq__question:hover {
  background: rgba(0, 75, 135, 0.04);
}

.faq__item[open] .faq__question {
  color: var(--color-blue, #004B87);
  background: rgba(0, 75, 135, 0.04);
}

.faq__q-marker {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-red, #E30613);
  color: var(--color-white, #FFFFFF);
  font-family: var(--font-heading, 'Helvetica Neue', 'Arial', sans-serif);
  font-weight: 900;
  font-size: 0.85rem;
  line-height: 1;
  transition: background 0.2s;
}

.faq__item[open] .faq__q-marker {
  background: var(--color-blue, #004B87);
}

.faq__question::after {
  content: "+";
  margin-left: auto;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold, #FFD700);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq__item[open] .faq__question::after {
  content: "−";
  transform: rotate(180deg);
}

.faq__answer {
  padding: 4px 16px 18px 54px;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-black, #111111);
  opacity: 0.92;
}

.faq__answer p {
  margin: 0 0 8px;
}

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

.faq__inline-link {
  color: var(--color-red, #E30613);
  text-decoration: underline;
  font-weight: 600;
  transition: color 0.2s;
}

.faq__inline-link:hover,
.faq__inline-link:focus-visible {
  color: var(--color-blue, #004B87);
}

/* ---- 底部CTA ---- */
.faq__cta {
  position: relative;
  z-index: 2;
  max-width: var(--max-width, 1280px);
  margin: 0 auto 60px;
  padding: 40px 28px;
  text-align: center;
  border-radius: var(--faq-radius, 8px);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 75, 135, 0.06) 0%, rgba(227, 6, 19, 0.04) 100%);
  border: 1px solid rgba(0, 75, 135, 0.1);
}

.faq__cta-glass {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 0;
}

.faq__cta-label {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-bottom: 12px;
  font-size: 0.8rem;
}

.faq__cta-text {
  position: relative;
  z-index: 1;
  font-size: 1.1rem;
  margin: 0 0 20px;
  color: var(--color-black, #111111);
  font-weight: 500;
}

.faq__cta-btn {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding: 14px 40px;
  font-size: 1rem;
}

/* ---- 蓝图装饰 ---- */
.faq__blueprint {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.18;
}

.faq__diagonal-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(135deg, var(--color-red, #E30613) 0%, var(--color-blue, #004B87) 50%, var(--color-gold, #FFD700) 100%);
  z-index: 1;
  opacity: 0.3;
}

.faq__diagonal-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(135deg, var(--color-gold, #FFD700) 0%, var(--color-blue, #004B87) 50%, var(--color-red, #E30613) 100%);
  z-index: 1;
  opacity: 0.2;
}

/* ===== 响应式：平板 768px+ ===== */
@media (min-width: 768px) {
  .faq__hero {
    height: 400px;
  }

  .faq__hero-content {
    padding: 0 40px;
  }

  .faq__dir {
    padding: 20px 36px;
    gap: 16px 32px;
  }

  .faq__dir-list {
    gap: 10px 20px;
  }

  .faq__main {
    padding: 0 32px 70px;
    gap: 32px;
  }

  .faq__section {
    padding: 28px 28px 32px;
  }

  .faq__section-title {
    font-size: 1.6rem;
  }

  .faq__download-visual {
    max-width: 400px;
  }

  .faq__question {
    padding: 16px 20px;
    font-size: 1rem;
  }

  .faq__answer {
    padding: 4px 20px 20px 62px;
    font-size: 0.95rem;
  }

  .faq__cta {
    padding: 48px 36px;
    margin: 0 32px 70px;
  }

  .faq__cta-text {
    font-size: 1.15rem;
  }
}

/* ===== 响应式：桌面 1024px+ ===== */
@media (min-width: 1024px) {
  .faq__main {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding: 0 40px 80px;
  }

  .faq__section {
    padding: 32px 30px 36px;
  }

  .faq__section-title {
    font-size: 1.7rem;
  }

  .faq__download-visual {
    max-width: 100%;
  }

  .faq__cta {
    margin: 0 40px 80px;
    padding: 56px 40px;
  }

  .faq__cta-btn {
    padding: 16px 48px;
    font-size: 1.05rem;
  }
}

/* ===== 响应式：宽屏 1400px+ ===== */
@media (min-width: 1400px) {
  .faq__hero {
    height: 440px;
  }

  .faq__main {
    gap: 32px;
  }

  .faq__section {
    padding: 36px 36px 40px;
  }
}

/* ---- 按钮样式补强（继承全局 .btn 体系） ---- */
.page-faq .btn--primary {
  background: var(--color-red, #E30613);
  color: var(--color-white, #FFFFFF);
  border: none;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 0.5px;
  transition: background 0.2s, transform 0.15s;
  border-radius: 0;
}

.page-faq .btn--primary:hover,
.page-faq .btn--primary:focus-visible {
  background: var(--color-blue, #004B87);
  transform: translateY(-2px);
}

/* ---- 焦点可见性 ---- */
.page-faq *:focus-visible {
  outline: 3px solid var(--color-gold, #FFD700);
  outline-offset: 2px;
}