/* ============================================
   News board-game.world — 未来档案馆
   米白背景 × 档案编号 × 未来文档系统 × 高级纸张质感
   ============================================ */

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

/* ===== CSS Variables ===== */
:root {
  /* 米白背景 - 档案纸张质感 */
  --arc-bg: #f5f3f0;
  --arc-bg-deep: #ebe8e4;
  --arc-bg-card: #faf8f5;
  --arc-bg-hero: linear-gradient(135deg, #f8f6f3 0%, #f0ede9 100%);
  
  /* 文字颜色 - 档案文档风格 */
  --arc-text-primary: #2c2c2c;
  --arc-text-secondary: #4a4a4a;
  --arc-text-muted: #6a6a6a;
  --arc-text-light: #8a8a8a;
  
  /* 档案编号主题色 - 深灰墨色 */
  --arc-accent: #1a1a1a;
  --arc-accent-light: #3a3a3a;
  --arc-accent-subtle: rgba(26, 26, 26, 0.08);
  
  /* 档案印章色 - 深红印章 */
  --arc-stamp: #8b0000;
  --arc-stamp-light: #a02020;
  --arc-stamp-glow: rgba(139, 0, 0, 0.15);
  
  /* 边框和阴影 - 档案文件风格 */
  --arc-border: rgba(26, 26, 26, 0.12);
  --arc-border-strong: rgba(26, 26, 26, 0.2);
  --arc-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --arc-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --arc-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --arc-shadow-paper: 0 2px 12px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
  
  /* 圆角 - 文档卡片 */
  --arc-radius: 4px;
  --arc-radius-lg: 8px;
  
  /* 字体 - 档案文档风格 */
  --arc-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --arc-font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --arc-font-mono: 'Courier New', Courier, monospace;
  
  /* 布局 */
  --arc-max-width: 1400px;
  --arc-section-gap: 80px;
}

/* ===== Body — 米白背景 × 纸张质感 ===== */
body {
  font-family: var(--arc-font-body);
  background: var(--arc-bg);
  color: var(--arc-text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* ===== 纸张纹理背景 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.01) 2px,
      rgba(0, 0, 0, 0.01) 4px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.01) 2px,
      rgba(0, 0, 0, 0.01) 4px
    );
  opacity: 0.5;
}

/* ===== Navigation — 档案馆导航 ===== */
.arc-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(250, 248, 245, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 2px solid var(--arc-accent);
  box-shadow: var(--arc-shadow-paper);
}

.arc-nav-inner {
  max-width: var(--arc-max-width);
  margin: 0 auto;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}

.arc-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--arc-accent);
  letter-spacing: 2px;
  text-decoration: none;
  transition: opacity 0.2s;
}

.arc-logo:hover { opacity: 0.8; }

.arc-logo-mark {
  font-size: 28px;
  font-weight: 900;
  color: var(--arc-stamp);
}

.arc-logo-text {
  font-family: var(--arc-font-mono);
  font-weight: 600;
}

.arc-nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.arc-nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--arc-text-secondary);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.2s;
  position: relative;
}

.arc-nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--arc-stamp);
  transition: width 0.3s;
}

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

.arc-nav-links a:hover::after {
  width: 100%;
}

.arc-nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.arc-search-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--arc-border);
  background: var(--arc-bg-card);
  border-radius: var(--arc-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.arc-search-btn:hover {
  border-color: var(--arc-accent);
  background: var(--arc-bg);
}

.arc-search-btn svg {
  width: 20px;
  height: 20px;
  color: var(--arc-text-secondary);
}

.arc-mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--arc-border);
  background: var(--arc-bg-card);
  border-radius: var(--arc-radius);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}

.arc-mobile-menu-btn span {
  width: 18px;
  height: 2px;
  background: var(--arc-text-secondary);
  border-radius: 1px;
}

/* ===== Search Overlay ===== */
.arc-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(245, 243, 240, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.arc-search-overlay.active {
  display: flex;
}

.arc-search-overlay-inner {
  max-width: 800px;
  width: 100%;
  position: relative;
}

.arc-search-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  font-size: 32px;
  color: var(--arc-text-secondary);
  cursor: pointer;
  transition: color 0.2s;
}

.arc-search-close:hover {
  color: var(--arc-accent);
}

.arc-search-box {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--arc-bg-card);
  border: 2px solid var(--arc-accent);
  border-radius: var(--arc-radius-lg);
  padding: 20px 24px;
  box-shadow: var(--arc-shadow-paper);
}

.arc-search-box svg {
  width: 24px;
  height: 24px;
  color: var(--arc-text-muted);
}

.arc-search-input {
  width: 100%;
  border: none;
  background: transparent;
  font-size: 18px;
  color: var(--arc-text-primary);
  outline: none;
  font-family: var(--arc-font-mono);
}

.arc-search-input::placeholder {
  color: var(--arc-text-light);
}

.arc-search-results {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arc-search-result-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--arc-bg-card);
  border: 1px solid var(--arc-border);
  border-radius: var(--arc-radius);
  padding: 16px;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: var(--arc-shadow-sm);
}

.arc-search-result-item:hover {
  border-color: var(--arc-accent);
  transform: translateY(-2px);
  box-shadow: var(--arc-shadow-md);
}

.arc-search-result-thumb {
  width: 80px;
  height: 60px;
  border-radius: var(--arc-radius);
  overflow: hidden;
  border: 1px solid var(--arc-border);
}

.arc-search-result-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.arc-search-result-info {
  flex: 1;
}

.arc-search-result-cat {
  font-size: 11px;
  font-weight: 600;
  color: var(--arc-stamp);
  letter-spacing: 1px;
  margin-bottom: 4px;
  font-family: var(--arc-font-mono);
}

.arc-search-result-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--arc-text-primary);
  line-height: 1.4;
}

.arc-search-empty {
  text-align: center;
  padding: 40px;
  color: var(--arc-text-muted);
  font-size: 14px;
  font-family: var(--arc-font-mono);
}

/* ===== Hero — 档案记录展示 ===== */
.arc-hero {
  position: relative;
  z-index: 1;
  padding: 80px 40px 60px;
  background: var(--arc-bg-hero);
  border-bottom: 2px solid var(--arc-accent);
}

.arc-hero-inner {
  max-width: var(--arc-max-width);
  margin: 0 auto;
}

.arc-hero-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--arc-stamp);
  letter-spacing: 3px;
  margin-bottom: 24px;
  font-family: var(--arc-font-mono);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.arc-hero-label::before {
  content: '━━';
  color: var(--arc-accent);
}

.arc-hero-card {
  display: block;
  background: var(--arc-bg-card);
  border: 2px solid var(--arc-accent);
  border-radius: var(--arc-radius-lg);
  overflow: hidden;
  box-shadow: var(--arc-shadow-paper);
  transition: all 0.3s;
  position: relative;
}

.arc-hero-card::before {
  content: 'Record #001';
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 11px;
  font-weight: 700;
  color: var(--arc-stamp);
  letter-spacing: 2px;
  font-family: var(--arc-font-mono);
  background: rgba(250, 248, 245, 0.9);
  padding: 6px 12px;
  border-radius: var(--arc-radius);
  border: 1px solid var(--arc-stamp);
}

.arc-hero-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--arc-shadow-lg);
  border-color: var(--arc-stamp);
}

.arc-hero-card-inner {
  display: flex;
  gap: 0;
}

.arc-hero-card-img {
  width: 50%;
  position: relative;
  overflow: hidden;
  border-right: 2px solid var(--arc-accent);
}

.arc-hero-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.arc-hero-card:hover .arc-hero-card-img img {
  transform: scale(1.05);
}

.arc-hero-card-body {
  width: 50%;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--arc-bg-card);
  position: relative;
}

.arc-hero-card-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--arc-stamp);
  letter-spacing: 2px;
  margin-bottom: 16px;
  font-family: var(--arc-font-mono);
  display: inline-block;
  border: 1px solid var(--arc-stamp);
  padding: 4px 12px;
  border-radius: var(--arc-radius);
}

.arc-hero-card-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--arc-accent);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.arc-hero-card-excerpt {
  font-size: 15px;
  color: var(--arc-text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
  border-left: 3px solid var(--arc-border-strong);
  padding-left: 16px;
}

.arc-hero-card-meta {
  font-size: 12px;
  font-weight: 600;
  color: var(--arc-accent);
  letter-spacing: 1px;
  font-family: var(--arc-font-mono);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

.arc-hero-card-meta svg {
  width: 16px;
  height: 16px;
}

.arc-hero-card:hover .arc-hero-card-meta {
  color: var(--arc-stamp);
}

/* ===== Divider — 档案分隔线 ===== */
.arc-divider {
  padding: 40px;
  display: flex;
  justify-content: center;
}

.arc-divider-line {
  width: 100%;
  max-width: var(--arc-max-width);
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--arc-accent) 0px,
    var(--arc-accent) 20px,
    transparent 20px,
    transparent 40px
  );
}

/* ===== Section — 档案分类区域 ===== */
.arc-section {
  position: relative;
  z-index: 1;
  padding: 60px 40px;
}

.arc-section-inner {
  max-width: var(--arc-max-width);
  margin: 0 auto;
}

.arc-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--arc-accent);
}

.arc-section-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--arc-stamp);
  letter-spacing: 3px;
  margin-bottom: 8px;
  font-family: var(--arc-font-mono);
  text-transform: uppercase;
}

.arc-section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--arc-accent);
  letter-spacing: 1px;
}

.arc-section-id {
  font-size: 12px;
  font-weight: 700;
  color: var(--arc-text-muted);
  letter-spacing: 2px;
  font-family: var(--arc-font-mono);
  padding: 8px 16px;
  border: 1px solid var(--arc-border);
  border-radius: var(--arc-radius);
  background: var(--arc-bg-card);
}

/* ===== Card Grid — 档案卡片网格 ===== */
.arc-records {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.arc-card {
  display: block;
  background: var(--arc-bg-card);
  border: 2px solid var(--arc-border-strong);
  border-radius: var(--arc-radius);
  overflow: hidden;
  box-shadow: var(--arc-shadow-paper);
  transition: all 0.3s;
  text-decoration: none;
  position: relative;
}

.arc-card::before {
  content: 'Record';
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 10px;
  font-weight: 700;
  color: var(--arc-text-muted);
  letter-spacing: 1px;
  font-family: var(--arc-font-mono);
  background: rgba(250, 248, 245, 0.9);
  padding: 4px 8px;
  border-radius: var(--arc-radius);
  border: 1px solid var(--arc-border);
}

.arc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--arc-shadow-md);
  border-color: var(--arc-accent);
}

.arc-card-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  border-bottom: 2px solid var(--arc-border);
  position: relative;
}

.arc-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.arc-card:hover .arc-card-img img {
  transform: scale(1.05);
}

.arc-card-body {
  padding: 24px;
  position: relative;
}

.arc-card-tag {
  font-size: 10px;
  font-weight: 700;
  color: var(--arc-stamp);
  letter-spacing: 1px;
  margin-bottom: 12px;
  font-family: var(--arc-font-mono);
  display: inline-block;
  border: 1px solid var(--arc-stamp);
  padding: 3px 8px;
  border-radius: var(--arc-radius);
}

.arc-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--arc-accent);
  line-height: 1.4;
  margin-bottom: 12px;
  letter-spacing: 0.3px;
}

.arc-card-excerpt {
  font-size: 14px;
  color: var(--arc-text-secondary);
  line-height: 1.5;
  border-left: 2px solid var(--arc-border);
  padding-left: 12px;
}

/* ===== Footer — 档案馆底部 ===== */
.arc-footer {
  position: relative;
  z-index: 1;
  padding: 60px 40px;
  background: var(--arc-bg-deep);
  border-top: 2px solid var(--arc-accent);
  margin-top: 80px;
}

.arc-footer-inner {
  max-width: var(--arc-max-width);
  margin: 0 auto;
  text-align: center;
}

.arc-footer-text {
  font-size: 14px;
  color: var(--arc-text-secondary);
  margin-bottom: 16px;
  font-family: var(--arc-font-mono);
  letter-spacing: 1px;
}

.arc-footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
}

.arc-footer-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--arc-text-secondary);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.2s;
  font-family: var(--arc-font-mono);
}

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

/* ===== Reveal Animation ===== */
.arc-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.arc-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .arc-nav-inner { padding: 0 24px; }
  .arc-hero { padding: 60px 24px 40px; }
  .arc-section { padding: 40px 24px; }
  .arc-footer { padding: 40px 24px; }
  
  .arc-hero-card-inner {
    flex-direction: column;
  }
  
  .arc-hero-card-img,
  .arc-hero-card-body {
    width: 100%;
  }
  
  .arc-hero-card-img {
    height: 300px;
    border-right: none;
    border-bottom: 2px solid var(--arc-accent);
  }
  
  .arc-records {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .arc-nav-links { display: none; }
  .arc-mobile-menu-btn { display: flex; }
  
  .arc-hero-card-title { font-size: 24px; }
  .arc-section-title { font-size: 22px; }
  
  .arc-records {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .arc-footer-links {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .arc-nav-inner { padding: 0 16px; height: 60px; }
  .arc-logo { font-size: 18px; }
  .arc-hero { padding: 40px 16px 30px; }
  .arc-section { padding: 30px 16px; }
  .arc-footer { padding: 30px 16px; }
  
  .arc-hero-card-body { padding: 24px; }
  .arc-hero-card-title { font-size: 20px; }
  .arc-section-title { font-size: 18px; }
  .arc-card-body { padding: 16px; }
  .arc-card-title { font-size: 16px; }
}