/* ═══════════════════════════════════════════════════
   bcc-style.css — BodyCompCheck Design System
   Prefix: bcc | Theme: Body Composition Science
   ═══════════════════════════════════════════════════ */

:root {
  --cell: #00838F;
  --atom: #00ACC1;
  --mass: #E0F7FA;
  --energy: #006064;
  --force: #FF6D00;
  --bcc-primary: var(--cell);
  --bcc-secondary: var(--atom);
  --bcc-bg: var(--mass);
  --bcc-text: var(--energy);
  --bcc-accent: var(--force);
  --bcc-light: #B2EBF2;
  --bcc-border: #B0BEC5;
  --bcc-text-light: #546E7A;
  --bcc-dark: #004D40;
  --bcc-radius: 0px;
  --bcc-radius-sm: 0px;
  --bcc-font-heading: 'Orbitron', sans-serif;
  --bcc-font-body: 'Titillium Web', sans-serif;
  --bcc-font-mono: 'Nova Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--bcc-font-body);
  color: var(--bcc-text);
  background: var(--bcc-bg);
  line-height: 1.6;
}

/* ═══ 广告系统 ═══ */
.sheet {
  width: 100% !important;
  height: 200px;
  display: none;
  margin: 1rem 0;
  grid-column: 1 / -1;
  background: var(--bcc-light);
  border: 1px solid var(--bcc-border);
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.sheet.visible, .sheet.active {
  display: flex;
  opacity: 1;
}
.sheet-label {
  font-family: var(--bcc-font-mono);
  font-size: 0.75rem;
  color: var(--bcc-text-light);
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* ═══ 导航栏 ═══ */
.bcc-nav {
  background: var(--bcc-primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.bcc-logo {
  font-family: var(--bcc-font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: 1px;
}
.bcc-logo span { color: var(--bcc-accent); }
.bcc-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}
.bcc-nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.bcc-nav-links a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.bcc-nav-links a:hover { color: var(--bcc-accent); }

@media (max-width: 768px) {
  .bcc-nav-toggle { display: block; }
  .bcc-nav-links {
    display: none !important;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bcc-primary);
    flex-direction: column !important;
    padding: 16px 24px;
    gap: 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  }
  .bcc-nav-links.active {
    display: flex !important;
  }
  .bcc-nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.15);
  }
}

/* ═══ 面包屑 ═══ */
.bcc-breadcrumb {
  max-width: 1200px;
  margin: 16px auto;
  padding: 0 24px;
  font-size: 0.85rem;
  color: var(--bcc-text-light);
}
.bcc-breadcrumb a {
  color: var(--bcc-primary);
  text-decoration: none;
}
.bcc-breadcrumb a:hover { text-decoration: underline; }
.bcc-breadcrumb span { margin: 0 6px; }

/* ═══ 容器 ═══ */
.bcc-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══ 按钮 ═══ */
.bcc-btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--bcc-font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s;
  text-align: center;
}
.bcc-btn-primary {
  background: var(--bcc-primary);
  color: #fff;
  border-color: var(--bcc-primary);
}
.bcc-btn-primary:hover { background: var(--bcc-dark); border-color: var(--bcc-dark); }
.bcc-btn-outline {
  background: transparent;
  color: var(--bcc-primary);
  border-color: var(--bcc-primary);
}
.bcc-btn-outline:hover { background: var(--bcc-primary); color: #fff; }
.bcc-btn-secondary {
  background: var(--bcc-secondary);
  color: #fff;
  border-color: var(--bcc-secondary);
}

/* ═══ 文章页 ═══ */
.bcc-post-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-post-header { margin-bottom: 24px; }
.bcc-post-header h1 {
  font-family: var(--bcc-font-heading);
  font-size: 2rem;
  color: var(--bcc-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}
.bcc-post-meta {
  font-size: 0.9rem;
  color: var(--bcc-text-light);
  margin-bottom: 12px;
}
.bcc-category-badge {
  background: var(--bcc-primary);
  color: #fff;
  padding: 2px 10px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.bcc-article-tags { margin-top: 8px; }
.bcc-post-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--bcc-text);
}
.bcc-post-content p { margin-bottom: 1.2em; }
.bcc-post-content h2, .bcc-post-content h3 {
  font-family: var(--bcc-font-heading);
  color: var(--bcc-dark);
  margin: 1.5em 0 0.5em;
}
.bcc-post-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 24px 0;
}

/* ═══ 作者框 ═══ */
.bcc-author-box {
  display: flex;
  gap: 20px;
  margin-top: 40px;
  padding: 24px;
  background: var(--mass);
  border-left: 4px solid var(--bcc-primary);
}
.bcc-author-avatar {
  width: 80px;
  height: 80px;
  object-fit: cover;
  flex-shrink: 0;
}
.bcc-author-name {
  font-family: var(--bcc-font-heading);
  font-size: 1.1rem;
  color: var(--bcc-dark);
}
.bcc-author-title {
  font-size: 0.85rem;
  color: var(--bcc-text-light);
  margin-bottom: 8px;
}
.bcc-author-bio {
  font-size: 0.95rem;
  color: var(--bcc-text);
  margin-bottom: 8px;
}
.bcc-author-location {
  font-size: 0.85rem;
  color: var(--bcc-text-light);
}
.bcc-author-bio-link {
  font-size: 0.85rem;
  color: var(--bcc-primary);
  text-decoration: none;
}

/* ═══ 尾部 1栏 标签页切换 ═══ */
.bcc-post-footer {
  max-width: 800px;
  margin: 32px auto;
  padding: 0 24px;
}
.bcc-tail-tabs {
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-tail-tab-buttons {
  display: flex;
  border-bottom: 2px solid var(--bcc-border);
}
.bcc-tail-tab-btn {
  flex: 1;
  padding: 14px;
  background: none;
  border: none;
  font-family: var(--bcc-font-heading);
  font-size: 0.9rem;
  color: var(--bcc-text-light);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.bcc-tail-tab-btn.active {
  color: var(--bcc-primary);
  border-bottom: 3px solid var(--bcc-primary);
}
.bcc-tail-tab-content {
  padding: 24px;
}
.bcc-related-list, .bcc-tool-rec-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.bcc-related-card {
  display: block;
  padding: 16px;
  background: var(--mass);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s;
}
.bcc-related-card:hover {
  box-shadow: 0 0 0 1px rgba(0,0,0,0.15);
}
.bcc-related-card h4 {
  font-family: var(--bcc-font-heading);
  font-size: 1rem;
  color: var(--bcc-dark);
  margin-bottom: 4px;
}
.bcc-related-card p {
  font-size: 0.85rem;
  color: var(--bcc-text-light);
}

/* ═══ 页脚 ═══ */
.bcc-footer {
  background: var(--bcc-dark);
  color: rgba(255,255,255,0.85);
  margin-top: 48px;
  padding: 40px 0 20px;
}
.bcc-footer-tabs {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 0 24px;
}
.bcc-footer-tab-buttons {
  display: flex;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  margin-bottom: 16px;
}
.bcc-footer-tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.6);
  font-family: var(--bcc-font-heading);
  font-size: 0.85rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.bcc-footer-tab-btn.active {
  color: var(--bcc-accent);
  border-bottom: 2px solid var(--bcc-accent);
}
.bcc-footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.bcc-footer-links-grid a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
}
.bcc-footer-links-grid a:hover { color: var(--bcc-accent); }
.bcc-footer-legal {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 16px 24px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.bcc-footer-legal a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 0.8rem;
}
.bcc-footer-legal a:hover { color: var(--bcc-accent); }
.bcc-footer-bottom {
  text-align: center;
  padding: 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ═══ 首页 Hero (Layout F) ═══ */
.bcc-hero-f {
  background: linear-gradient(135deg, var(--bcc-primary) 0%, var(--bcc-dark) 100%);
  color: #fff;
  padding: 64px 24px;
  text-align: center;
}
.bcc-hero-f h1 {
  font-family: var(--bcc-font-heading);
  font-size: 2.4rem;
  margin-bottom: 16px;
}
.bcc-hero-f p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 24px;
  opacity: 0.9;
}

/* ═══ 对比网格 ═══ */
.bcc-compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.bcc-compare-card {
  background: #fff;
  padding: 24px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-compare-card h3 {
  font-family: var(--bcc-font-heading);
  font-size: 1rem;
  color: var(--bcc-dark);
  margin-bottom: 8px;
}
.accuracy {
  font-family: var(--bcc-font-mono);
  font-size: 1.4rem;
  color: var(--bcc-primary);
  margin-bottom: 8px;
}
.accuracy span {
  font-size: 0.8rem;
  color: var(--bcc-text-light);
}

/* ═══ 卡片系统 ═══ */
.bcc-card {
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
  transition: box-shadow 0.2s;
  height: 100%;
}
.bcc-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.bcc-card-body { padding: 20px; }
.bcc-card-title {
  font-family: var(--bcc-font-heading);
  font-size: 1.05rem;
  color: var(--bcc-dark);
  margin-bottom: 8px;
}
.bcc-card-excerpt {
  font-size: 0.9rem;
  color: var(--bcc-text-light);
  line-height: 1.5;
}
.bcc-card-meta {
  display: block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--bcc-text-light);
}
.bcc-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

/* 整卡片可点击 */
a.bcc-article-card, a.bcc-tool-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
a.bcc-article-card *, a.bcc-tool-card * { pointer-events: none; }

/* ═══ 文章卡片网格 ═══ */
.bcc-article-card, .bcc-tool-card {
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-meta {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--bcc-text-light);
}

/* ═══ 工具页 ═══ */
.bcc-tool-layout-d {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}
.bcc-tool-layout-d h1 {
  font-family: var(--bcc-font-heading);
  font-size: 1.8rem;
  color: var(--bcc-dark);
  margin-bottom: 8px;
}
.tool-subtitle {
  color: var(--bcc-text-light);
  margin-bottom: 24px;
}
.bcc-tool-card-minimal {
  background: #fff;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-tool-card-minimal h3 {
  font-family: var(--bcc-font-heading);
  color: var(--bcc-dark);
  margin-bottom: 12px;
}

/* ═══ 工具尾部两栏 ═══ */
.bcc-article-tail {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-top: 48px;
}
.bcc-tail-related h3, .bcc-tail-tools h3 {
  font-family: var(--bcc-font-heading);
  font-size: 1rem;
  color: var(--bcc-dark);
  margin-bottom: 16px;
}
.bcc-tail-card {
  padding: 14px;
  background: var(--mass);
  margin-bottom: 12px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.05);
}
.bcc-tail-card-title {
  font-weight: 600;
  color: var(--bcc-dark);
  text-decoration: none;
  font-size: 0.95rem;
}
.bcc-tail-card-desc {
  font-size: 0.85rem;
  color: var(--bcc-text-light);
  margin-top: 4px;
}

/* ═══ 杂志 Hero ═══ */
.bcc-magazine-hero {
  background: linear-gradient(135deg, var(--bcc-primary) 0%, var(--bcc-dark) 100%);
  color: #fff;
  padding: 48px 24px;
}
.bcc-magazine-hero .bcc-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.bcc-magazine-hero-text h1 {
  font-family: var(--bcc-font-heading);
  font-size: 2.2rem;
  margin-bottom: 16px;
}
.bcc-magazine-hero-img img {
  width: 100%;
  height: auto;
  display: block;
}

/* ═══ 仪表板头部 ═══ */
.bcc-page-header {
  background: var(--bcc-primary);
  color: #fff;
  padding: 40px 24px;
  text-align: center;
}
.bcc-page-header h1 {
  font-family: var(--bcc-font-heading);
  font-size: 2rem;
  margin-bottom: 8px;
}
.bcc-dashboard-header {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.bcc-stat-card {
  background: #fff;
  padding: 20px;
  text-align: center;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-stat-number {
  font-family: var(--bcc-font-mono);
  font-size: 2rem;
  color: var(--bcc-primary);
}
.bcc-stat-label {
  font-size: 0.85rem;
  color: var(--bcc-text-light);
}

/* ═══ About 页 ═══ */
.bcc-about-e { padding: 40px 0; }
.bcc-about-e-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: start;
}
.bcc-about-e-photo img {
  width: 100%;
  height: auto;
  display: block;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.bcc-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.bcc-credential-badge {
  background: var(--bcc-primary);
  color: #fff;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-family: var(--bcc-font-mono);
}

/* ═══ 内联工具卡片 ═══ */
a.bcc-inline-tool {
  display: flex;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  background: #fff;
  padding: 16px;
  margin: 16px 0;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
  border-left: 4px solid var(--bcc-primary);
}
a.bcc-inline-tool * { pointer-events: none; }

/* 旧类名兼容 */
a.bcc-inline-tool .icon {
  font-size: 1.5rem;
  margin-right: 12px;
}
a.bcc-inline-tool .title {
  font-family: var(--bcc-font-heading);
  font-weight: 700;
  color: var(--bcc-dark);
}
a.bcc-inline-tool .desc {
  font-size: 0.9rem;
  color: var(--bcc-text-light);
}
a.bcc-inline-tool em {
  display: block;
  font-size: 0.8rem;
  color: var(--bcc-text-light);
  margin-top: 4px;
  font-style: italic;
}

/* 新类名兼容（文章写作使用） */
a.bcc-inline-tool .bcc-inline-tool-icon {
  font-size: 1.5rem;
  margin-right: 12px;
}
a.bcc-inline-tool .bcc-inline-tool-title {
  font-family: var(--bcc-font-heading);
  font-weight: 700;
  color: var(--bcc-dark);
}
a.bcc-inline-tool .bcc-inline-tool-desc {
  font-size: 0.9rem;
  color: var(--bcc-text-light);
}
a.bcc-inline-tool .bcc-inline-tool-privacy em {
  display: block;
  font-size: 0.8rem;
  color: var(--bcc-text-light);
  margin-top: 4px;
  font-style: italic;
}

/* ═══ 响应式 ═══ */
@media (max-width: 768px) {
  .bcc-compare-grid { grid-template-columns: 1fr; }
  .bcc-magazine-hero .bcc-container { grid-template-columns: 1fr; }
  .bcc-dashboard-header { grid-template-columns: repeat(2, 1fr); }
  .bcc-about-e-grid { grid-template-columns: 1fr; }
  .bcc-article-tail { grid-template-columns: 1fr; }
  .bcc-footer-links-grid { grid-template-columns: repeat(2, 1fr); }
  .bcc-post-header h1 { font-size: 1.5rem; }
  .bcc-hero-f h1 { font-size: 1.6rem; }
}