/* ===== 使用说明与免责声明 页面专属样式 ===== */
.page-disclaimer {
  --pd-primary: #1A1A2E;
  --pd-secondary: #6A0DAD;
  --pd-accent: #FF6F00;
  --pd-bg-dark: #12121f;
  --pd-text-white: #f0f0f0;
  --pd-text-muted: #b0b0c0;
  --pd-border-color: #2d2d4a;
  --pd-radius-card: 16px;
  --pd-radius-pill: 50px;
  --pd-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --pd-content-max: 880px;
  --pd-gap: 28px;

  display: block;
  width: 100%;
  background-color: var(--pd-bg-dark);
  color: var(--pd-text-white);
  font-family: var(--font-body, 'Source Serif Pro', Georgia, serif);
  line-height: 1.7;
  padding: 0 0 60px 0;
}

/* 内容容器 */
.page-disclaimer .content-container {
  max-width: var(--pd-content-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* 面包屑 */
.page-disclaimer .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 10px 0;
  font-size: 0.875rem;
  color: var(--pd-text-muted);
  font-family: var(--font-heading, 'Inter', sans-serif);
  letter-spacing: 0.02em;
}

.page-disclaimer .breadcrumb a {
  color: var(--pd-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--pd-transition);
}

.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  border-bottom-color: var(--pd-accent);
}

.page-disclaimer .breadcrumb .sep {
  color: var(--pd-border-color);
  user-select: none;
}

.page-disclaimer .breadcrumb [aria-current="page"] {
  color: var(--pd-text-muted);
  font-weight: 500;
}

/* 首屏英雄区 */
.page-disclaimer .hero-band {
  text-align: center;
  padding: 20px 0 36px 0;
  position: relative;
}

.page-disclaimer .hero-icon {
  display: block;
  width: 120px;
  height: auto;
  margin: 0 auto 16px auto;
  border-radius: var(--pd-radius-card);
  background: rgba(106, 13, 173, 0.12);
  padding: 8px;
  box-shadow: 0 4px 20px rgba(106, 13, 173, 0.15);
  object-fit: contain;
}

.page-disclaimer .hero-band h1 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #ffffff;
  margin: 0 0 10px 0;
  line-height: 1.2;
}

.page-disclaimer .hero-sub {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 1rem;
  color: var(--pd-text-muted);
  max-width: 640px;
  margin: 0 auto 16px auto;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.page-disclaimer .hero-line {
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--pd-accent), var(--pd-secondary));
  border-radius: 4px;
  margin: 0 auto;
}

/* 条款区块 */
.page-disclaimer .clause {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--pd-border-color);
  border-radius: var(--pd-radius-card);
  margin-bottom: var(--pd-gap);
  overflow: hidden;
  transition: border-color var(--pd-transition), box-shadow var(--pd-transition);
}

.page-disclaimer .clause:hover {
  border-color: rgba(106, 13, 173, 0.3);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

/* 条款头部（可点击折叠） */
.page-disclaimer .clause-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  cursor: pointer;
  user-select: none;
  background: rgba(106, 13, 173, 0.06);
  border-bottom: 1px solid transparent;
  transition: background var(--pd-transition), border-color var(--pd-transition);
}

.page-disclaimer .clause-header:hover {
  background: rgba(106, 13, 173, 0.10);
}

.page-disclaimer .clause-header h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #ffffff;
  margin: 0;
  line-height: 1.3;
}

/* 折叠按钮 */
.page-disclaimer .toggle-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--pd-border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--pd-transition), transform var(--pd-transition);
  padding: 0;
  margin-left: 12px;
}

.page-disclaimer .toggle-btn:hover,
.page-disclaimer .toggle-btn:focus-visible {
  background: rgba(255, 111, 0, 0.15);
  border-color: var(--pd-accent);
  outline: none;
}

.page-disclaimer .toggle-icon {
  display: block;
  width: 12px;
  height: 12px;
  position: relative;
  transition: transform var(--pd-transition);
}

.page-disclaimer .toggle-icon::before,
.page-disclaimer .toggle-icon::after {
  content: '';
  display: block;
  position: absolute;
  background-color: var(--pd-accent);
  border-radius: 2px;
  transition: transform var(--pd-transition);
}

.page-disclaimer .toggle-icon::before {
  width: 12px;
  height: 2px;
  top: 5px;
  left: 0;
}

.page-disclaimer .toggle-icon::after {
  width: 2px;
  height: 12px;
  top: 0;
  left: 5px;
}

/* 收起状态（由JS切换 data-collapsible） */
.page-disclaimer .clause[data-collapsible="closed"] .toggle-icon {
  transform: rotate(45deg);
}

.page-disclaimer .clause[data-collapsible="closed"] .clause-header {
  border-bottom-color: transparent;
}

/* 条款正文 */
.page-disclaimer .clause-body {
  padding: 20px 24px 24px 24px;
  color: var(--pd-text-white);
  font-size: 0.95rem;
  transition: max-height 0.4s ease, opacity 0.35s ease;
  overflow: hidden;
}

/* 折叠状态由JS控制隐藏/显示，这里仅定义基础样式 */
.page-disclaimer .clause[data-collapsible="closed"] .clause-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
  overflow: hidden;
}

.page-disclaimer .clause[data-collapsible="open"] .clause-body {
  max-height: 800px;
  opacity: 1;
}

.page-disclaimer .clause-body p {
  margin: 0 0 14px 0;
}

.page-disclaimer .clause-body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause-body ul {
  margin: 0 0 16px 0;
  padding: 0 0 0 20px;
  list-style: none;
}

.page-disclaimer .clause-body ul li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--pd-text-white);
  line-height: 1.6;
}

.page-disclaimer .clause-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--pd-accent);
  border-radius: 50%;
  opacity: 0.7;
}

.page-disclaimer .clause-body a {
  color: var(--pd-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 111, 0, 0.3);
  transition: border-color var(--pd-transition), color var(--pd-transition);
}

.page-disclaimer .clause-body a:hover,
.page-disclaimer .clause-body a:focus-visible {
  border-bottom-color: var(--pd-accent);
  color: #ff8c2e;
  outline: none;
}

/* 高亮文字 */
.page-disclaimer .highlight {
  color: var(--pd-accent);
  font-weight: 500;
  border-left: 3px solid var(--pd-accent);
  padding-left: 16px;
  background: rgba(255, 111, 0, 0.06);
  border-radius: 0 4px 4px 0;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.page-disclaimer .brand-mark {
  color: var(--pd-accent);
  font-weight: 600;
}

/* 联系列表 */
.page-disclaimer .contact-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 0 14px 0 !important;
}

.page-disclaimer .contact-list li {
  padding: 4px 0 4px 0 !important;
}

.page-disclaimer .contact-list li::before {
  display: none !important;
}

.page-disclaimer .contact-label {
  font-weight: 600;
  color: var(--pd-text-muted);
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 0.875rem;
  margin-right: 4px;
}

.page-disclaimer .contact-note {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--pd-text-muted);
  font-style: italic;
  border-top: 1px solid var(--pd-border-color);
  padding-top: 8px;
}

/* 底部返回链接 */
.page-disclaimer .back-link {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--pd-border-color);
}

.page-disclaimer .btn {
  display: inline-block;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 12px 32px;
  border-radius: var(--pd-radius-pill);
  text-decoration: none;
  transition: background var(--pd-transition), transform var(--pd-transition), box-shadow var(--pd-transition);
  cursor: pointer;
  border: none;
  line-height: 1.2;
}

.page-disclaimer .btn-primary {
  background: var(--pd-secondary);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(106, 13, 173, 0.25);
}

.page-disclaimer .btn-primary:hover,
.page-disclaimer .btn-primary:focus-visible {
  background: #7c1fc7;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(106, 13, 173, 0.35);
  outline: none;
}

.page-disclaimer .btn-primary:active {
  transform: translateY(0);
}

/* 屏幕阅读器专用 */
.page-disclaimer .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 窄屏适配 (移动端优先) ===== */
@media (max-width: 599px) {
  .page-disclaimer {
    padding-bottom: 40px;
  }

  .page-disclaimer .content-container {
    padding: 0 14px;
  }

  .page-disclaimer .breadcrumb {
    font-size: 0.8rem;
    padding: 14px 0 6px 0;
  }

  .page-disclaimer .hero-band {
    padding: 12px 0 24px 0;
  }

  .page-disclaimer .hero-icon {
    width: 80px;
  }

  .page-disclaimer .hero-band h1 {
    font-size: 1.5rem;
    letter-spacing: 0.02em;
  }

  .page-disclaimer .hero-sub {
    font-size: 0.9rem;
  }

  .page-disclaimer .clause-header {
    padding: 12px 16px;
  }

  .page-disclaimer .clause-header h2 {
    font-size: 1.05rem;
  }

  .page-disclaimer .clause-body {
    padding: 14px 16px 18px 16px;
    font-size: 0.88rem;
  }

  .page-disclaimer .clause-body ul {
    padding-left: 14px;
  }

  .page-disclaimer .clause-body ul li {
    padding: 5px 0 5px 14px;
    font-size: 0.88rem;
  }

  .page-disclaimer .clause-body ul li::before {
    top: 12px;
    width: 5px;
    height: 5px;
  }

  .page-disclaimer .highlight {
    font-size: 0.85rem;
    padding-left: 12px;
  }

  .page-disclaimer .contact-note {
    font-size: 0.8rem;
  }

  .page-disclaimer .btn {
    padding: 10px 24px;
    font-size: 0.88rem;
  }

  .page-disclaimer .back-link {
    margin-top: 28px;
  }
}

/* ===== 平板向上 ===== */
@media (min-width: 600px) and (max-width: 899px) {
  .page-disclaimer .hero-band h1 {
    font-size: 1.8rem;
  }

  .page-disclaimer .clause-header h2 {
    font-size: 1.15rem;
  }

  .page-disclaimer .clause-body {
    font-size: 0.92rem;
  }
}

/* ===== 桌面宽屏微调 ===== */
@media (min-width: 900px) {
  .page-disclaimer .hero-band h1 {
    font-size: 2.2rem;
  }

  .page-disclaimer .clause {
    margin-bottom: 32px;
  }

  .page-disclaimer .clause-header {
    padding: 18px 28px;
  }

  .page-disclaimer .clause-body {
    padding: 24px 28px 28px 28px;
  }

  .page-disclaimer .back-link {
    margin-top: 48px;
  }
}

/* ===== 确保图片响应 ===== */
.page-disclaimer img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== 交互渐进增强支持 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer *,
  .page-disclaimer *::before,
  .page-disclaimer *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}