/* ============================================
   SiC模法学院 - 样式表
   设计系统与 superones.top 统一
   ============================================ */

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #fafafa;
  --text-primary: #111111;
  --text-body: #374151;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --accent: #2563eb;
  --divider: #e5e7eb;
  --hover-bg: #f9fafb;
  --btn-primary: #111827;
  --btn-secondary: #f3f4f6;
  --error: #dc2626;
  --code-bg: #0d1117;
}

body {
  font-family: 'Inter', 'Noto Serif SC', -apple-system, 'PingFang SC', system-ui, sans-serif;
  background-color: var(--bg);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 16px;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color 0.3s;
}

.navbar.scrolled {
  border-bottom-color: var(--divider);
}

.nav-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-brand:hover {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-primary);
  cursor: pointer;
}

/* 主容器 */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  min-height: calc(100vh - 200px);
}

/* Hero 区块 */
.hero {
  padding-top: 8px;
  margin-bottom: 120px;
}

.hero-quote {
  font-family: 'Noto Serif SC', serif;
  font-size: 15px;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 32px;
  white-space: pre-line;
}

.hero-name {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.2;
}

@media (min-width: 640px) {
  .hero-name {
    font-size: 36px;
  }
}

.hero-tags {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 关于区块 */
.about {
  margin-bottom: 120px;
}

.section-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.about p {
  font-size: 15px;
  line-height: 2;
  color: var(--text-body);
  margin-bottom: 16px;
}

.about-project {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--divider);
}

/* 文章区块 */
.articles {
  margin-bottom: 120px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-header .view-all {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

.section-header .view-all:hover {
  opacity: 0.7;
}

.article-list {
  border-top: 1px solid var(--divider);
}

.article-item {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid var(--divider);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.2s;
}

.article-item:hover {
  background-color: var(--hover-bg);
  margin: 0 -12px;
  padding: 20px 12px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.article-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-tertiary);
}

.article-category {
  font-size: 12px;
  color: var(--text-tertiary);
}

.article-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.article-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-tags {
  margin-top: 8px;
}

.article-tags span {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* 项目区块 */
.projects {
  margin-bottom: 120px;
}

.project-list {
  border-top: 1px solid var(--divider);
}

.project-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--divider);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.2s;
}

.project-item:hover {
  background-color: var(--hover-bg);
  margin: 0 -12px;
  padding: 20px 12px;
}

.project-info {
  flex: 1;
}

.project-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.project-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.project-arrow {
  font-size: 14px;
  color: var(--text-tertiary);
  opacity: 0;
  transition: opacity 0.2s;
}

.project-item:hover .project-arrow {
  opacity: 1;
}

/* 订阅区块 */
.subscribe {
  margin-bottom: 120px;
}

.subscribe-form {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.subscribe-input {
  flex: 1;
  padding: 10px 16px;
  font-size: 14px;
  border: 1px solid var(--divider);
  border-radius: 6px;
  background: white;
  outline: none;
  transition: border-color 0.2s;
}

.subscribe-input:focus {
  border-color: var(--accent);
}

.subscribe-btn {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: white;
  background: var(--btn-primary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.subscribe-btn:hover {
  opacity: 0.9;
}

.subscribe-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.subscribe-message {
  margin-top: 12px;
  font-size: 14px;
}

.subscribe-message.success {
  color: var(--text-secondary);
}

.subscribe-message.error {
  color: var(--error);
}

/* 文章详情页 */
.article-detail {
  padding-top: 8px;
}

.article-detail .back-link {
  display: inline-block;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 32px;
}

.article-detail .back-link:hover {
  opacity: 0.7;
}

.article-detail h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.article-detail .meta {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.article-content {
  font-size: 16px;
  line-height: 2;
  color: var(--text-body);
}

.article-content h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  font-size: 15px;
  font-style: italic;
  color: var(--text-secondary);
  border-left: 2px solid var(--divider);
  padding-left: 16px;
  margin: 24px 0;
}

.article-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  background: var(--btn-secondary);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-content pre {
  background: var(--code-bg);
  border-radius: 8px;
  padding: 20px;
  margin: 24px 0;
  overflow-x: auto;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: #e6edf3;
  font-size: 13px;
  line-height: 1.6;
}

/* 项目列表页 */
.project-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.project-card {
  display: block;
  padding: 24px;
  background: white;
  border: 1px solid var(--divider);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.project-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.project-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 分类筛选 */
.category-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.category-tab {
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s;
}

.category-tab.active {
  background: var(--btn-primary);
  color: white;
}

.category-tab:not(.active) {
  background: var(--btn-secondary);
  color: var(--text-secondary);
}

.category-tab:hover:not(.active) {
  background: var(--divider);
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--divider);
  padding: 40px 24px;
  text-align: center;
}

.footer-content {
  max-width: 680px;
  margin: 0 auto;
}

.footer-contact {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copyright {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* 加载状态 */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--divider);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 移动端适配 */
@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--divider);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .hero-name {
    font-size: 28px;
  }
}