/* ===== v4 暖纸人文风格体系（参考 Anthropic）=====
   主色调：米白暖纸底 (#FAF9F5) + 近黑墨字 (#1A1A17) + 陶土暖色 Accent (#B8532F) + 优雅 Serif 标题
   全端 Mobile-First 响应式布局规范
*/

:root {
  /* 品牌色与语义位 */
  --c-blue: #b8532f;          
  --c-blue-d: #9a4327;
  --c-blue-ink: #7d3620;
  --c-cyan: #c98b6b;
  --c-violet: #8a6f5c;
  --grad-star: linear-gradient(100deg, #b8532f 0%, #c98b6b 60%, #8a6f5c 100%);

  /* 墨字与中性色 */
  --c-ink: #1a1a17;            
  --c-slate: #3f3d37;          
  --c-gray: #77726a;           
  --c-line: #e3ded4;           
  --c-line-soft: #ede8de;      
  --c-soft: #f2efe6;           
  --c-tint: #f4ece5;           
  --c-bg: #faf9f5;             
  --c-card-bg: #ffffff;        

  /* 字体系统 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-serif: Georgia, 'Noto Serif SC', 'Songti SC', serif;
  --font-mono: ui-monospace, 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* 尺寸与阴影 */
  --maxw: 1180px;
  --radius: 6px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --shadow-card: 0 2px 6px rgba(26, 26, 23, 0.04), 0 1px 2px rgba(26, 26, 23, 0.06);
  --shadow-hover: 0 12px 28px -12px rgba(26, 26, 23, 0.18);
  --shadow-float: 0 24px 48px -16px rgba(26, 26, 23, 0.22);
}

/* 基础重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  background-color: var(--c-bg);
  color: var(--c-slate);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}

/* 标题排版 */
h1, h2, h3, .font-serif {
  font-family: var(--font-serif);
  color: var(--c-ink);
  letter-spacing: -0.015em;
  font-weight: 600;
  word-break: break-word;
}
h1 { font-size: 2.75rem; line-height: 1.2; }
h2 { font-size: 2.1rem; line-height: 1.25; }
h3 { font-size: 1.4rem; line-height: 1.35; }

/* 布局容器 */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header & 导航 (Mobile First) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 249, 245, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--c-ink);
  text-decoration: none;
}
.brand-logo svg { height: 26px; width: auto; flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
.nav-links a {
  color: var(--c-ink);
  font-size: 0.9375rem;
  font-weight: 500;
  opacity: 0.85;
  text-decoration: none;
}
.nav-links a:hover, .nav-links a.active {
  opacity: 1;
  color: var(--c-blue);
}

/* 移动端汉堡按钮（加 margin-left: auto 确保靠最右侧） */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--c-ink);
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto; /* 靠最右 */
  line-height: 1;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background-color: var(--c-blue);
  color: #ffffff !important;
  box-shadow: 0 2px 4px rgba(184, 83, 47, 0.2);
}
.btn-primary:hover {
  background-color: var(--c-blue-d);
  box-shadow: 0 4px 12px rgba(184, 83, 47, 0.3);
}
.btn-outline {
  background-color: transparent;
  border-color: var(--c-line);
  color: var(--c-ink) !important;
}
.btn-outline:hover {
  background-color: var(--c-soft);
  border-color: var(--c-gray);
}
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.85rem; }
.btn-lg { padding: 0.85rem 1.75rem; font-size: 1.05rem; }

/* 标签 / Eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--c-blue);
  background: rgba(184, 83, 47, 0.08);
  border: 1px solid rgba(184, 83, 47, 0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--c-blue);
}

/* 卡片系统 */
.card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(184, 83, 47, 0.3);
}

/* 响应式表格包裹容器 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 1.5rem;
}

/* 交互模态框 Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(26, 26, 23, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: 1rem;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-float);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}
.modal-overlay.active .modal-box {
  transform: scale(1);
}

/* 交互表单规范 */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--c-ink); margin-bottom: 0.375rem; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.9375rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--c-ink);
  outline: none;
}

/* 页脚 */
.site-footer {
  background: #141412;
  color: #a39f96;
  padding: 4.5rem 0 2.5rem;
  border-top: 1px solid #282824;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}
.footer-col h4 { color: #ffffff; font-size: 0.9375rem; font-weight: 600; margin-bottom: 1.25rem; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.75rem; }
.footer-col a { color: #a39f96; font-size: 0.875rem; text-decoration: none; }
.footer-col a:hover { color: #ffffff; }

/* ===== 手机与平板端响应式媒体查询 (Mobile Breakpoints) ===== */

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
}

@media (max-width: 768px) {
  h1 { font-size: 1.65rem !important; line-height: 1.25; }
  h2 { font-size: 1.35rem !important; }
  h3 { font-size: 1.15rem !important; }
  
  .container { padding: 0 1.25rem; }

  /* 显示汉堡菜单图标并靠最右边 */
  .mobile-toggle {
    display: block !important;
    margin-left: auto !important;
  }

  /* nav 容器在移动端不占用 Flex 主轴宽度 */
  nav {
    display: contents;
  }
  
  /* 折叠移动端导航菜单 */
  .nav-links {
    position: absolute;
    top: 4.25rem;
    left: 0;
    right: 0;
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-line);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1.25rem;
    box-shadow: var(--shadow-hover);
    display: none;
    z-index: 1001;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links a {
    font-size: 1.05rem;
    width: 100%;
    padding: 0.4rem 0;
  }

  /* 移动端隐藏右侧按钮组 */
  .header-actions { display: none !important; }

  .modal-box { padding: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }

  .badge-bar { flex-direction: column; align-items: flex-start; gap: 0.85rem; }
  .badge-bar > div:nth-child(even) { display: none; }
}

@media (max-width: 480px) {
  h1 { font-size: 1.55rem !important; }
  .btn { width: 100%; text-align: center; }
}

/* 积分充值与购买组件 */
.points-tier-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.25rem 0;
}
.points-tier-card {
  background: #ffffff;
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}
.points-tier-card:hover {
  border-color: var(--c-blue);
  box-shadow: var(--shadow-card);
}
.points-tier-card.active {
  border-color: var(--c-blue);
  background: rgba(184, 83, 47, 0.04);
}
.points-badge {
  position: absolute;
  top: -10px;
  right: -5px;
  background: var(--c-blue);
  color: #fff;
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}
.pay-qrcode-box {
  background: #ffffff;
  border: 1px dashed var(--c-blue);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  margin: 1.25rem 0;
}
.pay-qrcode-placeholder {
  width: 160px;
  height: 160px;
  margin: 0 auto 0.75rem;
  background: #f4ece5;
  border: 1px solid var(--c-line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--c-slate);
}
@media (max-width: 768px) {
  .points-tier-grid { grid-template-columns: 1fr 1fr; }
}

.wb-beam-v4 span { width: 6px; height: 100%; border-radius: 3px; animation: wbBeamV4 1.15s ease-in-out infinite; }
.wb-beam-v4 span:nth-child(1) { animation-delay: 0s; background-color: #b8532f; }
.wb-beam-v4 span:nth-child(2) { animation-delay: .16s; background-color: #c98b6b; }
.wb-beam-v4 span:nth-child(3) { animation-delay: .32s; background-color: #8a6f5c; }
.wb-beam-v4 span:nth-child(4) { animation-delay: .48s; background-color: #b8532f; }
@keyframes wbBeamV4 { 0%, 100% { transform: scaleY(.3); } 50% { transform: scaleY(1); } }