/* =========================================================
   书喜科技 — 编辑杂志风设计系统
   主色:#064e3b(深绿) | 强调:#059669(亮绿) | 对比:#ea580c(暖橙)
   字体:Source Han Serif 衬线 + 系统无衬线
   ========================================================= */
:root {
  /* 主色阶 */
  --primary: #064e3b;
  --primary-dark: #022c22;
  --primary-light: #047857;
  --primary-soft: #ecfdf5;

  /* 强调色 */
  --accent: #059669;
  --accent-2: #10b981;
  --accent-soft: #d1fae5;
  --highlight: #ea580c;  /* 暖橙,作为对比强调 */
  --highlight-soft: #fff7ed;

  /* 背景 */
  --bg: #ffffff;
  --bg-alt: #fafaf7;
  --bg-ink: #064e3b;

  /* 文字 */
  --text: #0a1f1a;
  --text-2: #4b5563;
  --text-muted: #9ca3af;
  --text-inverse: #fafaf7;

  /* 边框(直边为主) */
  --border: #0a1f1a;
  --border-soft: #e5e7eb;
  --border-faint: #f3f4f6;

  /* 圆角:杂志风用直边或极小圆角 */
  --r-sm: 2px;
  --r-md: 4px;

  /* 阴影:克制 */
  --shadow-sm: 0 1px 0 rgba(10, 31, 26, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(10, 31, 26, 0.08);

  /* 字体栈 */
  --font-serif: "Source Han Serif SC", "Source Han Serif CN", "Noto Serif CJK SC", "Songti SC", "STSong", "SimSun", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  /* 尺寸 */
  --max-w: 1280px;
  --nav-h: 68px;
}

/* === 全局 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--text); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font: inherit; border: none; outline: none; background: none; }
input, textarea { font: inherit; }

::selection { background: var(--primary); color: #fff; }

/* === 容器 === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }
.section { padding: 120px 0; position: relative; }

/* 杂志风 Kicker(英文小标) */
.kicker {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
  position: relative;
  padding-left: 28px;
}
.kicker::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 18px; height: 2px;
  background: var(--accent);
  transform: translateY(-50%);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--text);
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-2);
  margin-bottom: 72px;
  max-width: 680px;
  line-height: 1.75;
}

/* === 导航栏 === */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--bg);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all .25s;
}
.navbar.scrolled {
  border-bottom-color: var(--border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.navbar .logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.01em;
}
.navbar .logo .icon {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  border-radius: 0;
}
.nav-links { display: flex; gap: 40px; align-items: center; }
.nav-links a {
  font-family: var(--font-sans);
  color: var(--text-2);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.01em;
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width .25s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: none;
}
.hamburger span {
  display: block;
  width: 26px; height: 2px;
  background: var(--text);
  transition: all .3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* === Hero === */
.hero {
  padding: 180px 0 120px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--border);
}
.hero::before {
  content: "Issue 01 / 2026";
  position: absolute;
  top: 32px;
  right: 32px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 80px;
  background: var(--primary);
  clip-path: polygon(0 100%, 50% 50%, 100% 100%);
}
.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 80px;
  align-items: end;
}
.hero-content { position: relative; }
.hero h1 {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: 32px;
  letter-spacing: -0.03em;
  color: var(--text);
  max-width: 800px;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 700;
}
.hero .hero-desc {
  font-size: 1.15rem;
  color: var(--text-2);
  max-width: 540px;
  line-height: 1.8;
}
.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero-meta strong { color: var(--text); font-weight: 600; }
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 40px;
}

/* 按钮:直边 + 边框 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all .2s;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover {
  background: var(--text);
  color: #fff;
}

/* === 服务卡片 === */
#services { background: var(--bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 2px solid var(--border);
  border-left: 1px solid var(--border-soft);
}
.service-card {
  background: var(--bg-card);
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  padding: 48px 40px;
  position: relative;
  transition: all .25s;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}
.service-card:hover {
  background: var(--bg-alt);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card .card-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 24px;
  display: block;
}
.service-card .card-icon {
  font-size: 2.4rem;
  margin-bottom: 24px;
  display: block;
  line-height: 1;
}
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.service-card .card-desc {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 24px;
}
.service-card .card-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border-faint);
}
.service-card .card-features li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding-left: 24px;
  position: relative;
  line-height: 1.6;
}
.service-card .card-features li::before {
  content: "→";
  position: absolute;
  left: 0; top: 0;
  color: var(--accent);
  font-weight: 700;
}

/* === 核心优势 === */
#advantages { background: var(--bg-alt); }
#advantages .section-title { color: var(--text); }
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.advantage-card {
  padding: 56px 40px;
  position: relative;
  border-right: 1px solid var(--border-soft);
  background: transparent;
  transition: all .25s;
}
.advantage-card:nth-child(2n) { border-right: none; }
.advantage-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 100%;
  background: var(--primary);
  transition: width .3s;
  z-index: 0;
}
.advantage-card:hover::before { width: 100%; }
.advantage-card > * { position: relative; z-index: 1; transition: color .25s; }
.advantage-card:hover { color: #fff; }
.advantage-card:hover .adv-icon,
.advantage-card:hover h3,
.advantage-card:hover p { color: #fff; }
.advantage-card .adv-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 20px;
  display: block;
  transition: color .25s;
}
.advantage-card:hover .adv-num { color: var(--accent-2); }
.advantage-card .adv-icon {
  font-size: 2.6rem;
  margin-bottom: 20px;
  display: block;
  line-height: 1;
  transition: color .25s;
}
.advantage-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color .25s;
}
.advantage-card p {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
  transition: color .25s;
}

/* === 新闻预览 === */
#news-preview { background: var(--bg); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 2px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.news-card {
  background: var(--bg-card);
  padding: 40px 36px;
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  transition: all .3s;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
}
.news-card:nth-child(2n) { border-right: none; }
.news-card:hover {
  background: var(--bg-alt);
}
.news-card .news-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 18px;
  display: block;
}
.news-card .news-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
  letter-spacing: 0.05em;
}
.news-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card h3 a { color: inherit; transition: color .2s; }
.news-card h3 a:hover { color: var(--accent); }
.news-card .news-summary {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 20px;
}
.news-card .news-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-faint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.news-card .news-meta span { display: inline-flex; align-items: center; gap: 4px; }
.section-footer { text-align: center; padding-top: 56px; }

/* === 关于我们 === */
#about { background: var(--primary); color: var(--text-inverse); position: relative; }
#about .kicker { color: var(--accent-2); }
#about .kicker::before { background: var(--accent-2); }
#about .section-title { color: #fff; }
#about .section-title em { color: var(--accent-2); font-style: italic; }
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-content p {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.7;
  margin-bottom: 48px;
  font-weight: 400;
}
.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}
.about-info .info-item {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  padding-right: 24px;
}
.about-info .info-item:nth-child(2n) { border-right: none; padding-right: 0; padding-left: 24px; }
.about-info .info-item:nth-last-child(-n+2) { border-bottom: none; }
.about-info .info-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-2);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.about-info .info-value {
  font-size: 0.98rem;
  font-weight: 500;
  color: #fff;
  line-height: 1.5;
}
.about-aside {
  position: relative;
  padding: 48px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}
.about-aside .aside-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.8rem;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 24px;
  font-weight: 400;
}
.about-aside .aside-quote::before {
  content: """;
  font-size: 4rem;
  line-height: 0;
  color: var(--accent-2);
  font-family: var(--font-serif);
  vertical-align: -0.4em;
  margin-right: 4px;
}
.about-aside .aside-attr {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* === 页脚 === */
.site-footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  padding: 80px 0 32px;
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr;
  gap: 56px;
  margin-bottom: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand .logo-text {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
  transition: color .2s;
  line-height: 1.5;
}
.footer-col a:hover { color: var(--accent-2); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

/* === 新闻列表页 === */
.page-header {
  padding: 160px 0 80px;
  background: var(--bg);
  border-bottom: 2px solid var(--border);
  text-align: left;
  position: relative;
}
.page-header::before {
  content: "Archive / 全部资讯";
  position: absolute;
  top: 32px;
  right: 32px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.page-header h1 {
  font-family: var(--font-serif);
  font-size: 3.6rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-header p {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 640px;
  line-height: 1.7;
}
.news-list-section { padding: 72px 0 96px; }
.news-list-item {
  display: grid;
  grid-template-columns: 100px 1fr 60px;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border-soft);
  align-items: center;
  transition: all .25s;
}
.news-list-item:hover {
  padding-left: 16px;
  padding-right: 16px;
  background: var(--bg-alt);
}
.news-list-item .news-date-box {
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  line-height: 1.2;
  text-align: left;
  border-left: 3px solid var(--primary);
  padding-left: 16px;
}
.news-list-item .news-date-box .day {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.news-list-item .news-date-box .month {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
}
.news-list-item .news-info { min-width: 0; }
.news-list-item .news-info h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.news-list-item .news-info h3 a { color: var(--text); transition: color .2s; }
.news-list-item .news-info h3 a:hover { color: var(--accent); }
.news-list-item .news-info .summary {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-list-item .news-info .meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
  letter-spacing: 0.05em;
}
.news-list-item .news-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.5rem;
  transition: all .25s;
}
.news-list-item:hover .news-arrow {
  color: var(--primary);
  transform: translateX(6px);
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border-soft);
}
.pagination button, .pagination .page-num {
  min-width: 44px;
  height: 44px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-2);
  transition: all .2s;
  cursor: pointer;
  border: 1px solid transparent;
}
.pagination button:hover:not(:disabled), .pagination .page-num:hover {
  color: var(--text);
  border-color: var(--border);
}
.pagination .page-num.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.pagination button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* === 新闻详情页 === */
.article-section { padding: 160px 0 96px; background: var(--bg); }
.article-container { max-width: 820px; margin: 0 auto; }
.article-header {
  padding-bottom: 32px;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--border);
}
.article-header h1 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.article-meta {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.article-meta span { display: inline-flex; align-items: center; gap: 5px; }
.article-body {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.95;
  color: var(--text);
  font-weight: 400;
}
.article-body p {
  margin-bottom: 28px;
}
.article-body img {
  margin: 24px 0;
  border: 1px solid var(--border-soft);
}
.article-back { margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--border-soft); }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color .2s;
}
.back-link:hover { color: var(--accent); }
.back-link::before { content: "←"; font-size: 1.1rem; }

/* 加载 & 错误 */
.loading {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.error-msg { text-align: center; padding: 60px 20px; color: var(--highlight); }
.error-msg h2 { font-size: 1.5rem; margin-bottom: 8px; }
.not-found { text-align: left; padding: 80px 0; }
.not-found h2 {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  line-height: 1;
}
.not-found p { color: var(--text-2); margin-bottom: 32px; font-size: 1.1rem; }

/* === 响应式:平板 === */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 3.4rem; }
  .hero::before { position: static; display: block; margin-bottom: 24px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .container { padding: 0 20px; }
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all .3s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-faint);
    width: 100%;
  }
  .nav-links a:last-child { border-bottom: none; }

  .section { padding: 72px 0; }
  .section-title { font-size: 2.2rem; }
  .section-subtitle { margin-bottom: 48px; }
  .hero { padding: 120px 0 72px; }
  .hero h1 { font-size: 2.6rem; }
  .hero .hero-desc { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .services-grid { grid-template-columns: 1fr; }
  .service-card { padding: 36px 28px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .advantage-card { padding: 36px 28px; }
  .advantage-card:nth-child(2n) { border-right: 1px solid var(--border-soft); }
  .news-grid { grid-template-columns: 1fr; }
  .news-card { padding: 32px 24px; border-right: 1px solid var(--border-soft); }
  .news-card:nth-child(2n) { border-right: 1px solid var(--border-soft); }
  .news-list-item { grid-template-columns: 80px 1fr 40px; gap: 16px; }
  .news-list-item .news-date-box { padding-left: 12px; }
  .news-list-item .news-date-box .day { font-size: 1.6rem; }
  .article-section { padding: 100px 0 64px; }
  .article-header h1 { font-size: 2rem; }
  .article-body { font-size: 1.05rem; }
  .page-header { padding: 100px 0 56px; }
  .page-header h1 { font-size: 2.4rem; }
  .page-header::before { position: static; display: block; margin-bottom: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .not-found h2 { font-size: 3.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 1.8rem; }
  .hero { padding: 100px 0 56px; }
  .hero h1 { font-size: 2.1rem; }
  .service-card { padding: 28px 20px; }
  .news-card { padding: 24px 20px; }
  .about-content p { font-size: 1.1rem; }
  .about-info { grid-template-columns: 1fr; }
  .about-info .info-item { border-right: none; padding-left: 0 !important; padding-right: 0; }
  .about-info .info-item:nth-last-child(2) { border-bottom: 1px solid rgba(255, 255, 255, 0.2); }
  .article-header h1 { font-size: 1.6rem; }
  .page-header h1 { font-size: 1.8rem; }
  .news-list-item { grid-template-columns: 1fr; gap: 12px; padding: 20px 0; }
  .news-list-item .news-date-box { flex-direction: row; gap: 12px; align-items: baseline; border-left: 3px solid var(--primary); padding-left: 12px; }
  .news-list-item .news-date-box .day { font-size: 1.3rem; }
  .news-list-item:hover { padding-left: 0; padding-right: 0; }
  .news-list-item .news-arrow { display: none; }
  .pagination button, .pagination .page-num { min-width: 38px; height: 38px; font-size: 0.8rem; }
}