/* ============================================
   Neo Newspaper — 新派数字报纸
   米白纸张 × 衬线标题 × 蓝色分隔线 × 多栏排版 × AI摘要
   ============================================ */

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

:root {
  --paper-bg: #f9f6f1;
  --paper-dark: #f2ede4;
  --ink-black: #1a1a1a;
  --ink-dark: #333333;
  --ink-muted: #666666;
  --ink-light: #888888;
  --accent-blue: #1a56db;
  --accent-blue-light: #3b82f6;
  --accent-blue-pale: #dbeafe;
  --accent-blue-faint: #eff6ff;
  --rule-color: #1a56db;
  --rule-thin: rgba(26, 86, 219, 0.25);
  --rule-thick: rgba(26, 86, 219, 0.6);
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --col-gap: 24px;
}

body {
  font-family: var(--font-body);
  background: var(--paper-bg);
  color: var(--ink-black);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  /* 纸张纹理 */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(26,86,219,0.02) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.018'/%3E%3C/svg%3E");
  background-color: var(--paper-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== 报纸顶部导航 ===== */
.nn-top-bar {
  border-bottom: 2px solid var(--rule-color);
  background: var(--paper-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nn-top-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
}

/* 报头 Logo */
.nn-masthead {
  text-align: center;
}
.nn-masthead-name {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink-black);
  line-height: 1;
}
.nn-masthead-date {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-top: 4px;
  font-weight: 500;
}

/* 导航链接 */
.nn-nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}
.nn-nav-links li a {
  display: block;
  padding: 8px 18px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink-dark);
  border-left: 1px solid var(--rule-thin);
  transition: all 0.25s;
  position: relative;
}
.nn-nav-links li:first-child a { border-left: none; }
.nn-nav-links li a:hover {
  color: var(--accent-blue);
  background: var(--accent-blue-faint);
}
.nn-nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--rule-color);
  transition: width 0.25s;
}
.nn-nav-links li a:hover::after { width: 60%; }

.nn-nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nn-search-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--rule-thin);
  border-radius: 0;
  transition: all 0.25s;
  color: var(--ink-muted);
}
.nn-search-btn:hover {
  border-color: var(--rule-color);
  color: var(--accent-blue);
  background: var(--accent-blue-faint);
}
.nn-search-btn svg { width: 16px; height: 16px; }
.nn-mobile-menu-btn {
  display: none;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  color: var(--ink-black);
  border: 1px solid var(--rule-thin);
}
.nn-mobile-menu-btn svg { width: 20px; height: 20px; }

/* ===== 搜索覆盖层 ===== */
.nn-search-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(249,246,241,0.92);
  backdrop-filter: blur(12px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 14vh;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.nn-search-overlay.active { opacity: 1; pointer-events: all; }
.nn-search-overlay-inner {
  width: 100%; max-width: 600px;
  background: #fff;
  border: 1px solid var(--rule-thin);
  padding: 32px; position: relative;
  max-height: 70vh; overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.nn-search-close {
  position: absolute; top: 12px; right: 16px;
  font-size: 28px; background: none; border: none;
  cursor: pointer; color: var(--ink-light); line-height: 1;
  transition: color 0.2s;
}
.nn-search-close:hover { color: var(--ink-black); }
.nn-search-box {
  display: flex; align-items: center; gap: 12px;
  border-bottom: 2px solid var(--rule-color);
  padding-bottom: 16px; margin-bottom: 20px;
}
.nn-search-box svg { width: 20px; height: 20px; color: var(--accent-blue); flex-shrink: 0; }
.nn-search-input {
  width: 100%; border: none; outline: none;
  font-size: 18px; font-family: var(--font-body);
  background: transparent; color: var(--ink-black);
}
.nn-search-input::placeholder { color: var(--ink-light); }
.nn-search-results { display: flex; flex-direction: column; gap: 4px; }
.nn-search-result-item {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 8px; border-radius: 0;
  text-decoration: none; color: inherit; transition: background 0.2s;
  border-bottom: 1px solid var(--paper-dark);
}
.nn-search-result-item:hover { background: var(--accent-blue-faint); }
.nn-search-result-thumb {
  width: 60px; height:44px; overflow: hidden;
  flex-shrink: 0; background: var(--paper-dark);
}
.nn-search-result-thumb img { width: 100%; height: 100%; object-fit: cover; }
.nn-search-result-info { flex: 1; min-width: 0; }
.nn-search-result-cat {
  font-size: 9px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent-blue); margin-bottom: 2px;
}
.nn-search-result-title {
  font-size: 14px; line-height: 1.4;
  color: var(--ink-dark);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nn-search-empty { text-align: center; padding: 32px; color: var(--ink-light); font-size: 14px; }

/* ===== 头版区域 ===== */
.nn-front-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* 头版日期条 */
.nn-edition-bar {
  text-align: center;
  padding: 24px 0 16px;
  border-bottom: 1px solid var(--rule-thin);
  margin-bottom: 28px;
}
.nn-edition-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--ink-light);
  font-weight: 600;
}
.nn-edition-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: 1px;
  margin-top: 6px;
  color: var(--ink-black);
}

/* 分类导航条 */
.nn-section-nav {
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 2px solid var(--rule-color);
  margin-bottom: 32px;
}
.nn-section-nav a {
  padding: 10px 28px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--ink-dark);
  border-right: 1px solid var(--rule-thin);
  transition: all 0.25s;
  position: relative;
}
.nn-section-nav a:last-child { border-right: none; }
.nn-section-nav a:hover,
.nn-section-nav a.active {
  color: var(--accent-blue);
  background: var(--accent-blue-faint);
}
.nn-section-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--rule-color);
}

/* ===== 主报道区（双栏）===== */
.nn-main-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--col-gap);
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--rule-thin);
}
.nn-main-hero {
  grid-column: span 2;
  position: relative;
  margin-bottom: var(--col-gap);
}
.nn-main-hero img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  filter: grayscale(10%) contrast(1.05);
}
.nn-main-hero-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(26,26,26,0.85), transparent);
  padding: 40px 28px 20px;
}
.nn-main-tag {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent-blue);
  padding: 4px 12px;
  margin-bottom: 12px;
}
.nn-main-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  letter-spacing: -0.5px;
}
.nn-main-lead {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-dark);
  column-count: 2;
  column-gap: var(--col-gap);
  column-rule: 1px solid var(--rule-thin);
}
.nn-main-lead p {
  margin-bottom: 14px;
  text-indent: 1.5em;
}
.nn-main-lead p:first-child {
  font-size: 19px;
  font-weight: 500;
  color: var(--ink-black);
}
.nn-main-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--rule-thin);
  font-size: 11px;
  color: var(--ink-light);
  letter-spacing: 1px;
}
.nn-main-meta span { display: flex; align-items: center; gap: 5px; }
.nn-main-meta svg { width: 13px; height: 13px; }

/* ===== AI 摘要模块 ===== */
.nn-ai-summary {
  background: var(--accent-blue-faint);
  border: 1px solid var(--rule-thin);
  border-left: 4px solid var(--accent-blue);
  padding: 24px 28px;
  margin-bottom: 40px;
  position: relative;
}
.nn-ai-summary::before {
  content: 'AI BRIEFING';
  position: absolute;
  top: -10px;
  left: 20px;
  background: var(--accent-blue);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2.5px;
  padding: 3px 12px;
}
.nn-ai-summary-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent-blue);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.nn-ai-summary-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-dark);
  font-style: italic;
}
.nn-ai-summary-text strong {
  color: var(--accent-blue);
  font-style: normal;
  font-weight: 700;
}

/* ===== 专题双栏 ===== */
.nn-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--col-gap);
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--rule-thin);
}
.nn-feature-card {
  border: 1px solid var(--rule-thin);
  padding: 0;
  transition: all 0.3s;
  background: #fff;
}
.nn-feature-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  border-color: var(--rule-thick);
}
.nn-feature-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  filter: grayscale(15%);
  transition: filter 0.4s;
}
.nn-feature-card:hover img { filter: grayscale(0%); }
.nn-feature-body {
  padding: 20px 22px 22px;
}
.nn-feature-tag {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 8px;
  display: block;
}
.nn-feature-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-black);
  margin-bottom: 8px;
}
.nn-feature-excerpt {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 数据统计栏（报纸风格）===== */
.nn-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 2px solid var(--rule-color);
  border-bottom: 2px solid var(--rule-color);
  margin-bottom: 40px;
  background: #fff;
}
.nn-stat-item {
  padding: 24px 20px;
  text-align: center;
  border-right: 1px solid var(--rule-thin);
}
.nn-stat-item:last-child { border-right: none; }
.nn-stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
}
.nn-stat-label {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 6px;
  font-weight: 600;
}
.nn-stat-sub {
  font-size: 10px;
  color: var(--ink-light);
  margin-top: 4px;
}

/* ===== 引言区 ===== */
.nn-quote-block {
  text-align: center;
  padding: 48px 40px;
  margin-bottom: 40px;
  border-top: 1px solid var(--rule-thin);
  border-bottom: 1px solid var(--rule-thin);
  position: relative;
}
.nn-quote-mark {
  font-family: var(--font-display);
  font-size: 80px;
  color: var(--accent-blue-pale);
  line-height: 1;
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
}
.nn-quote-text {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 400;
  font-style: italic;
  line-height: 1.5;
  color: var(--ink-dark);
  max-width: 720px;
  margin: 0 auto 16px;
  position: relative;
  z-index: 1;
}
.nn-quote-author {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-blue);
  font-weight: 700;
}

/* ===== 最新资讯列表（报纸目录风格）===== */
.nn-latest-section {
  margin-bottom: 48px;
}
.nn-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--rule-color);
}
.nn-section-header-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-blue);
}
.nn-section-header h2 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink-black);
  letter-spacing: 0.5px;
}
.nn-view-all {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s;
}
.nn-view-all:hover { gap: 10px; }
.nn-view-all svg { width: 13px; height: 13px; }

/* 文章流 - 报纸目录式 */
.nn-news-list {
  list-style: none;
}
.nn-news-item {
  display: grid;
  grid-template-columns: 70px 1fr auto;
  gap: 20px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px dotted var(--rule-thin);
  transition: background 0.2s;
  cursor: pointer;
}
.nn-news-item:hover { background: var(--accent-blue-faint); }
.nn-news-date {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-light);
  letter-spacing: 0.5px;
  font-variant-numeric: tabular-nums;
}
.nn-news-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink-black);
  transition: color 0.2s;
}
.nn-news-item:hover .nn-news-title { color: var(--accent-blue); }
.nn-news-cat {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-blue);
  border: 1px solid var(--rule-thin);
  padding: 3px 10px;
  white-space: nowrap;
}

/* ===== 精选网格 ===== */
.nn-featured-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--col-gap);
  margin-bottom: 40px;
}
.nn-featured-main {
  border: 1px solid var(--rule-thin);
  background: #fff;
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.nn-featured-main:hover { box-shadow: 0 4px 24px rgba(0,0,0,0.06); }
.nn-featured-main img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  filter: grayscale(10%);
  transition: filter 0.4s;
}
.nn-featured-main:hover img { filter: grayscale(0%); }
.nn-featured-main-body { padding: 22px 24px 24px; }
.nn-featured-side {
  display: flex;
  flex-direction: column;
  gap: var(--col-gap);
}
.nn-featured-sm {
  border: 1px solid var(--rule-thin);
  background: #fff;
  overflow: hidden;
  flex: 1;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s;
}
.nn-featured-sm:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.05); }
.nn-featured-sm img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  filter: grayscale(15%);
  transition: filter 0.4s;
}
.nn-featured-sm:hover img { filter: grayscale(0%); }
.nn-featured-sm-body { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }

/* ===== Footer（报纸版脚）===== */
.nn-footer {
  border-top: 3px double var(--rule-color);
  background: var(--paper-dark);
  padding: 48px 0 32px;
  margin-top: 48px;
}
.nn-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}
.nn-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 36px;
}
.nn-footer-brand {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-black);
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.nn-footer-desc {
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.7;
  max-width: 300px;
}
.nn-footer-heading {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule-thin);
}
.nn-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.nn-footer-links a {
  font-size: 13px;
  color: var(--ink-dark);
  transition: color 0.2s;
  padding: 2px 0;
}
.nn-footer-links a:hover { color: var(--accent-blue); }
.nn-footer-bottom {
  border-top: 1px solid var(--rule-thin);
  padding-top: 20px;
  text-align: center;
  font-size: 11px;
  color: var(--ink-light);
  letter-spacing: 1px;
}

/* ===== 进入动画 ===== */
.nn-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.nn-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   详情页样式 — 报纸文章排版
   ============================================ */

/* 文章头部 */
.nn-article-header {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 32px 24px;
  text-align: center;
}
.nn-article-kicker {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-blue);
  border: 1px solid var(--rule-thin);
  padding: 4px 16px;
  margin-bottom: 18px;
}
.nn-article-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--ink-black);
  margin-bottom: 18px;
}
.nn-article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.5px;
  padding-top: 14px;
  border-top: 1px solid var(--rule-thin);
}
.nn-article-meta span { display: flex; align-items: center; gap: 5px; }
.nn-article-meta svg { width: 14px; height: 14px; }

/* 文章封面图 */
.nn-article-cover {
  max-width: 900px;
  margin: 0 auto 32px;
  padding: 0 32px;
}
.nn-article-cover img {
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: cover;
  border: 1px solid var(--rule-thin);
}
.nn-article-cover-caption {
  font-size: 11px;
  color: var(--ink-light);
  text-align: right;
  margin-top: 8px;
  font-style: italic;
}

/* 文章正文 — 双栏报纸排版 */
.nn-article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px 64px;
}
.nn-article-columns {
  column-count: 2;
  column-gap: 36px;
  column-rule: 1px solid var(--rule-thin);
}
.nn-article-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dark);
  margin-bottom: 16px;
  text-align: justify;
  hyphens: auto;
}
.nn-article-body p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 700;
  float: left;
  line-height: 0.82;
  margin-right: 10px;
  margin-top: 4px;
  color: var(--accent-blue);
}
.nn-article-body h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  margin: 32px 0 14px;
  color: var(--ink-black);
  column-span: all;
  break-after: avoid;
  border-bottom: 1px solid var(--rule-thin);
  padding-bottom: 8px;
}
.nn-article-body blockquote {
  border-left: 3px solid var(--accent-blue);
  padding: 16px 0 16px 24px;
  margin: 24px 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-style: italic;
  line-height: 1.6;
  color: var(--ink-dark);
  background: var(--accent-blue-faint);
  column-span: all;
  break-inside: avoid;
}

/* AI 摘要（详情页内嵌） */
.nn-inline-ai {
  background: var(--accent-blue-faint);
  border: 1px solid var(--rule-thin);
  border-left: 4px solid var(--accent-blue);
  padding: 20px 24px;
  margin: 28px 0;
  column-span: all;
  break-inside: avoid;
}
.nn-inline-ai-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nn-inline-ai-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dark);
  font-style: italic;
}

/* 相关媒体 */
.nn-related-media {
  max-width: 900px;
  margin: 0 auto 48px;
  padding: 0 32px;
}
.nn-related-media-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule-thin);
}
.nn-related-media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.nn-related-media-item {
  border: 1px solid var(--rule-thin);
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.3s;
}
.nn-related-media-item:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.05); }
.nn-related-media-item img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  filter: grayscale(10%);
  transition: filter 0.4s;
}
.nn-related-media-item:hover img { filter: grayscale(0%); }

/* 相关文章 */
.nn-related-articles {
  max-width: 900px;
  margin: 0 auto 48px;
  padding: 0 32px;
}
.nn-related-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-black);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--rule-color);
}
.nn-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.nn-related-card {
  border: 1px solid var(--rule-thin);
  background: #fff;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s;
}
.nn-related-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  border-color: var(--rule-thick);
}
.nn-related-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  filter: grayscale(15%);
  transition: filter 0.4s;
}
.nn-related-card:hover img { filter: grayscale(0%); }
.nn-related-card-body { padding: 14px 16px 16px; }
.nn-related-card-tag {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 6px;
}
.nn-related-card-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-black);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nn-main-story { grid-template-columns: 1fr; }
  .nn-main-hero { grid-column: span 1; }
  .nn-main-lead { column-count: 1; }
  .nn-features { grid-template-columns: 1fr; }
  .nn-stats-row { grid-template-columns: repeat(2, 1fr); }
  .nn-featured-grid { grid-template-columns: 1fr; }
  .nn-footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .nn-article-columns { column-count: 1; }
  .nn-related-grid { grid-template-columns: repeat(2, 1fr); }
  .nn-related-media-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --col-gap: 16px; }
  .nn-front-page { padding: 0 20px; }
  .nn-top-bar-inner { padding: 10px 20px; flex-wrap: wrap; gap: 10px; }
  .nn-masthead-name { font-size: 22px; }
  .nn-nav-links { display: none; }
  .nn-mobile-menu-btn { display: flex; }
  .nn-section-nav { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .nn-section-nav a { white-space: nowrap; padding: 10px 20px; font-size: 11px; }
  .nn-main-hero img { height: 280px; }
  .nn-main-headline { font-size: 24px; }
  .nn-stats-row { grid-template-columns: repeat(2, 1fr); }
  .nn-stat-item { padding: 18px 14px; }
  .nn-stat-num { font-size: 28px; }
  .nn-news-item { grid-template-columns: 60px 1fr; gap: 12px; }
  .nn-news-cat { display: none; }
  .nn-quote-block { padding: 32px 20px; }
  .nn-quote-mark { font-size: 50px; }
  .nn-footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .nn-article-header { padding: 28px 20px 20px; }
  .nn-article-title { font-size: 26px; }
  .nn-article-cover { padding: 0 20px; }
  .nn-article-body { padding: 0 20px 48px; }
  .nn-related-media, .nn-related-articles { padding: 0 20px; }
  .nn-related-grid { grid-template-columns: 1fr; }
  .nn-related-media-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .nn-masthead-name { font-size: 18px; letter-spacing: 1px; }
  .nn-edition-title { font-size: 24px; }
  .nn-main-headline { font-size: 20px; }
  .nn-stats-row { grid-template-columns: 1fr 1fr; }
  .nn-stat-num { font-size: 24px; }
  .nn-feature-title { font-size: 16px; }
  .nn-news-title { font-size: 14px; }
  .nn-article-body p { font-size: 14px; }
  .nn-article-body p:first-of-type::first-letter { font-size: 42px; }
}