/* ============================================================
   kexue-huabao-design · 传统报纸黑白灰版式（默认）
   作用域：html.kexue-huabao（server.js 注入，默认启用）
   同时覆盖旧文章结构（hero/article-content/case-summary…）
   与新模板结构（masthead/cols2/case-box/refs-box…）
   ============================================================ */

/* ---------- 1. 调色板 · 纯黑白灰 ---------- */
html.kexue-huabao {
  --kh-paper: #f7f5f0;          /* 新闻纸米白 */
  --kh-paper-dark: #ece9e2;     /* 旧纸灰 */
  --kh-paper-light: #fcfbf8;    /* 高光纸面 */
  --kh-ink: #111111;            /* 油墨黑 */
  --kh-ink-soft: #44443f;       /* 次级油墨 */
  --kh-red: #111111;            /* 强调 = 纯黑 */
  --kh-red-dark: #000000;
  --kh-gold: #6b6b66;           /* 铜灰 */
  --kh-teal: #33333a;           /* 深灰蓝 */
  --kh-taupe: #7a7a75;
  --kh-line: rgba(17, 17, 17, 0.55);
  --kh-line-soft: rgba(17, 17, 17, 0.18);
  --kh-serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", "Georgia", "Times New Roman", serif;
  --kh-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;

  --orange: var(--kh-red);
  --charcoal: var(--kh-ink);
  --cream: var(--kh-paper);
  --smoke: var(--kh-paper-dark);
  --white: var(--kh-paper-light);
  --gold: var(--kh-gold);
  --cognac: var(--kh-ink-soft);
  --taupe: var(--kh-taupe);
  --warm-shadow: 0 3px 14px rgba(0, 0, 0, 0.08);
  --font: var(--kh-serif);
  --serif: var(--kh-serif);
}

/* ---------- 2. 纸面肌理 · 全局 ---------- */
html.kexue-huabao body {
  background-color: var(--kh-paper) !important;
  background-image:
    radial-gradient(ellipse at 18% -5%, rgba(0, 0, 0, 0.035), transparent 55%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='grain'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23grain)' opacity='0.05'/></svg>");
  color: var(--kh-ink) !important;
  font-family: var(--kh-serif) !important;
  line-height: 1.85 !important;
  letter-spacing: 0.02em;
}

html.kexue-huabao a { color: var(--kh-ink); text-decoration: underline; text-underline-offset: 3px; }
html.kexue-huabao a:hover { color: var(--kh-ink-soft); }

/* ---------- 3. 导航 · 旧结构 ---------- */
html.kexue-huabao nav {
  background: var(--kh-paper) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-bottom: 3px double var(--kh-ink) !important;
  box-shadow: none;
}
html.kexue-huabao .nav-logo { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.1em; color: var(--kh-ink); font-size: 22px; }
html.kexue-huabao .nav-logo span { color: var(--kh-ink); }
html.kexue-huabao .nav-links a {
  font-family: var(--kh-serif); font-size: 13.5px; letter-spacing: 0.14em;
  color: var(--kh-ink-soft); font-weight: 700;
}
html.kexue-huabao .nav-links a:hover { color: var(--kh-ink); }
html.kexue-huabao .lang-switch { background: var(--kh-paper); border: 1px solid var(--kh-line); border-radius: 0; font-family: var(--kh-serif); }
html.kexue-huabao .lang-switch a { color: var(--kh-ink-soft); }
html.kexue-huabao .lang-switch a.active { background: var(--kh-ink); color: var(--kh-paper); border-radius: 0; }

/* ---------- 3b. 导航 · 新模板 ---------- */
html.kexue-huabao .topline { border-bottom: 1px solid var(--kh-line); padding: 8px 0; }
html.kexue-huabao .topline-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--kh-ink-soft); letter-spacing: 0.08em; }
html.kexue-huabao .topline-links { display: flex; gap: 18px; }
html.kexue-huabao .topline-links a { color: var(--kh-ink-soft); text-decoration: none; }
html.kexue-huabao .topline-links a:hover { color: var(--kh-ink); text-decoration: underline; }
html.kexue-huabao .navbar { border-bottom: 1px solid var(--kh-ink); background: var(--kh-paper); position: sticky; top: 0; z-index: 100; }
html.kexue-huabao .navbar-inner { max-width: 1080px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
html.kexue-huabao .navbar-links { display: flex; gap: 20px; list-style: none; flex-wrap: wrap; padding: 0; }
html.kexue-huabao .navbar-links a { font-size: 0.85rem; font-weight: 700; color: var(--kh-ink); text-decoration: none; letter-spacing: 0.08em; border-bottom: 1px solid transparent; padding-bottom: 2px; }
html.kexue-huabao .navbar-links a:hover { border-bottom-color: var(--kh-ink); }
html.kexue-huabao .navbar-search { display: flex; gap: 0; }
html.kexue-huabao .navbar-search input { padding: 4px 10px; font-size: 0.8rem; border: 1px solid var(--kh-ink); background: var(--kh-paper); font-family: inherit; outline: none; width: 160px; color: var(--kh-ink); }
html.kexue-huabao .navbar-search button { padding: 4px 14px; border: 1px solid var(--kh-ink); background: var(--kh-ink); color: var(--kh-paper); font-family: inherit; font-size: 0.8rem; cursor: pointer; }

/* ---------- 4. 报头 · 旧 hero ---------- */
html.kexue-huabao .hero { background: transparent !important; min-height: auto; padding: 60px 5% 40px; border-bottom: 3px double var(--kh-ink); }
html.kexue-huabao .hero::before, html.kexue-huabao .hero::after { display: none; }
html.kexue-huabao .hero-eyebrow { color: var(--kh-ink); font-family: var(--kh-serif); letter-spacing: 0.45em; text-transform: uppercase; text-indent: 0.45em; font-weight: 700; }
html.kexue-huabao .hero h1 { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.02em; color: var(--kh-ink); }
html.kexue-huabao .hero h1 .highlight, html.kexue-huabao .hero h1 .highlight-gold { color: var(--kh-ink); font-style: normal; }
html.kexue-huabao .hero-sub { font-weight: 400; color: var(--kh-ink-soft); }
html.kexue-huabao .hero-date { color: var(--kh-taupe); }
html.kexue-huabao .hero-stat-num { font-family: var(--kh-serif); font-style: normal; font-weight: 900; color: var(--kh-ink); }
html.kexue-huabao .hero-stat-label { letter-spacing: 0.25em; color: var(--kh-taupe); }

/* ---------- 4b. 报头 · 新模板 masthead ---------- */
html.kexue-huabao .masthead { border-bottom: 4px double var(--kh-ink); padding: 26px 0 20px; text-align: center; }
html.kexue-huabao .masthead-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
html.kexue-huabao .masthead-title { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.12em; font-size: clamp(34px, 5.5vw, 58px); color: var(--kh-ink); line-height: 1.2; }
html.kexue-huabao .masthead-title .accent { color: var(--kh-ink); }
html.kexue-huabao .masthead-sub { margin-top: 6px; font-size: 0.8rem; color: var(--kh-ink-soft); letter-spacing: 0.25em; }

/* ---------- 5. 章节 ---------- */
html.kexue-huabao section { padding: 56px 5%; }
html.kexue-huabao .section-alt { background: var(--kh-paper-dark); border-top: 1px solid var(--kh-line-soft); border-bottom: 1px solid var(--kh-line-soft); }
html.kexue-huabao .section-label { color: var(--kh-ink); font-family: var(--kh-serif); letter-spacing: 0.35em; text-indent: 0.35em; text-transform: uppercase; font-weight: 900; }
html.kexue-huabao .section-label::after { content: "——"; margin-left: 10px; color: var(--kh-ink); opacity: 0.7; }
html.kexue-huabao .section-title { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); }
html.kexue-huabao .section-title .gold { color: var(--kh-ink); font-style: normal; }
html.kexue-huabao .section-desc { color: var(--kh-ink-soft); }

/* ---------- 6. 卡片 ---------- */
html.kexue-huabao .card { background: var(--kh-paper-light); border: 1px solid var(--kh-line-soft); border-radius: 0; box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.08); }
html.kexue-huabao .card:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.12); }
html.kexue-huabao .card-num { font-family: var(--kh-serif); font-style: normal; color: var(--kh-ink); }
html.kexue-huabao .card h3 { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); }
html.kexue-huabao .card p { color: var(--kh-ink-soft); text-align: justify; }

/* ---------- 7. 引用框 ---------- */
html.kexue-huabao .highlight-box { background: var(--kh-paper-light); border: 1px solid var(--kh-line); border-left: 4px double var(--kh-ink); border-radius: 0; box-shadow: none; position: relative; }
html.kexue-huabao .highlight-box::before { content: "❝"; position: absolute; top: 8px; left: 12px; font-family: Georgia, serif; font-size: 40px; line-height: 1; color: var(--kh-ink); opacity: 0.3; }
html.kexue-huabao .highlight-box .quote { font-family: var(--kh-serif); color: var(--kh-ink); text-align: justify; }

/* ---------- 8. 分隔线 ---------- */
html.kexue-huabao .divider { height: 0; background: transparent !important; border-top: 1px solid var(--kh-line); border-bottom: 1px solid var(--kh-paper-dark); border-radius: 0; position: relative; margin: 26px 0 34px; }
html.kexue-huabao .divider::before { content: "◆"; position: absolute; top: -11px; left: 0; font-size: 11px; color: var(--kh-ink); }

/* ---------- 9. 正文 · 铅字排版 ---------- */
html.kexue-huabao .article-content { max-width: 780px; }
html.kexue-huabao .article-content p {
  font-family: var(--kh-serif); font-size: 17px; line-height: 2.05; color: var(--kh-ink);
  text-align: justify; text-indent: 2em; margin-bottom: 1.6em; letter-spacing: 0.015em;
}
html.kexue-huabao .article-content p:first-of-type::first-letter {
  float: left; font-size: 3.2em; line-height: 0.85; padding: 4px 8px 0 0;
  font-weight: 900; color: var(--kh-ink); font-family: var(--kh-serif);
}

/* ---------- 9b. 正文 · 新模板 ---------- */
html.kexue-huabao .main { max-width: 1080px; margin: 0 auto; padding: 28px 20px 48px; }
html.kexue-huabao .pagehead { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
html.kexue-huabao .page-num { font-size: 0.8rem; font-style: italic; color: var(--kh-ink-soft); }
html.kexue-huabao .section-tag { display: inline-block; background: var(--kh-ink); color: var(--kh-paper); padding: 2px 12px; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; font-family: var(--kh-sans); }
html.kexue-huabao .thick-rule { border-top: 3px solid var(--kh-ink); border-bottom: 1px solid var(--kh-ink); height: 5px; margin-bottom: 22px; }
html.kexue-huabao .double-rule { border-top: 1px solid var(--kh-ink); border-bottom: 3px solid var(--kh-ink); height: 5px; margin: 30px 0; }
html.kexue-huabao .headline { font-family: var(--kh-serif); font-weight: 900; line-height: 1.25; letter-spacing: -0.01em; font-size: clamp(26px, 4vw, 42px); margin: 16px 0 8px; color: var(--kh-ink); }
html.kexue-huabao .subheadline { font-size: clamp(15px, 1.8vw, 18px); color: var(--kh-ink-soft); font-style: italic; margin-bottom: 18px; font-weight: 500; }
html.kexue-huabao .byline { font-size: 0.85rem; color: var(--kh-ink); margin-bottom: 20px; font-weight: 700; letter-spacing: 0.06em; }
html.kexue-huabao .byline .sep { color: var(--kh-taupe); margin: 0 8px; }
html.kexue-huabao .tag-chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 18px; }
html.kexue-huabao .chip { display: inline-block; padding: 2px 12px; font-size: 0.78rem; font-weight: 700; border: 1px solid var(--kh-ink); color: var(--kh-ink); background: var(--kh-paper); font-family: var(--kh-sans); }
html.kexue-huabao .chip-ind { background: var(--kh-ink); color: var(--kh-paper); }
html.kexue-huabao .chip-scene { border-style: double; }
html.kexue-huabao .chip-tech { border-style: dashed; }
html.kexue-huabao .body { font-size: 0.95rem; line-height: 1.9; text-align: justify; color: var(--kh-ink); }
html.kexue-huabao .body p { margin-bottom: 16px; text-indent: 0; }
html.kexue-huabao .body p:first-child::first-letter {
  font-size: 3.2rem; font-weight: 900; float: left; line-height: 0.85;
  margin-right: 0.45rem; margin-top: 0.35rem; color: var(--kh-ink);
}
html.kexue-huabao .cols2 { column-count: 2; column-rule: 1px solid var(--kh-line); column-gap: 2rem; }
html.kexue-huabao .pull-quote {
  font-size: clamp(17px, 2vw, 22px); font-weight: 700; line-height: 1.5; text-align: center;
  border-top: 3px double var(--kh-ink); border-bottom: 3px double var(--kh-ink);
  padding: 18px 0; margin: 28px 0; color: var(--kh-ink);
}

/* ---------- 9c. 案例速览 · 新旧两套 ---------- */
html.kexue-huabao .case-summary { border: 2px solid var(--kh-ink); margin: 22px 0; }
html.kexue-huabao .case-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
html.kexue-huabao .case-table th { background: var(--kh-ink); color: var(--kh-paper); padding: 8px 14px; font-family: var(--kh-sans); font-weight: 700; text-align: left; }
html.kexue-huabao .case-table td { padding: 10px 14px; border-bottom: 1px solid var(--kh-line-soft); }
html.kexue-huabao .case-value { font-weight: 700; }
html.kexue-huabao .case-box { border: 2px solid var(--kh-ink); margin: 22px 0; }
html.kexue-huabao .case-box-head { background: var(--kh-ink); color: var(--kh-paper); padding: 8px 14px; font-family: var(--kh-sans); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.15em; }
html.kexue-huabao .case-row { display: flex; gap: 14px; padding: 12px 16px; border-bottom: 1px solid var(--kh-line); font-size: 0.9rem; }
html.kexue-huabao .case-row:last-child { border-bottom: none; }
html.kexue-huabao .case-label { flex: 0 0 84px; font-weight: 700; color: var(--kh-ink); font-size: 0.8rem; padding-top: 2px; }

/* ---------- 9d. 要点 / FAQ / CTA ---------- */
html.kexue-huabao .takeaway-box { border: 1px solid var(--kh-ink); padding: 20px 22px; margin: 24px 0; background: var(--kh-paper-dark); }
html.kexue-huabao .takeaway-box h2, html.kexue-huabao .faq-box h2, html.kexue-huabao .refs-box h2 {
  font-size: 1.1rem; font-weight: 900; margin-bottom: 14px; font-family: var(--kh-sans);
  border-bottom: 1px solid var(--kh-ink); padding-bottom: 8px; color: var(--kh-ink);
}
html.kexue-huabao .takeaway-list { list-style: none; padding: 0; margin: 0; }
html.kexue-huabao .takeaway-list li { position: relative; padding-left: 24px; margin-bottom: 10px; font-size: 0.92rem; line-height: 1.8; color: var(--kh-ink); }
html.kexue-huabao .takeaway-list li::before { content: "■"; position: absolute; left: 0; top: 2px; color: var(--kh-ink); font-size: 0.7rem; }
html.kexue-huabao .faq-box { margin: 26px 0; }
html.kexue-huabao .faq-block { margin: 26px 0; border: 1px solid var(--kh-line-soft); }
html.kexue-huabao .faq-item { border: 1px solid var(--kh-ink); border-bottom: none; }
html.kexue-huabao .faq-item:last-child { border-bottom: 1px solid var(--kh-ink); }
html.kexue-huabao .faq-item summary { cursor: pointer; padding: 13px 16px; font-weight: 700; font-size: 0.95rem; list-style: none; font-family: var(--kh-sans); color: var(--kh-ink); }
html.kexue-huabao .faq-item summary::-webkit-details-marker { display: none; }
html.kexue-huabao .faq-item summary::after { content: "▾"; float: right; color: var(--kh-ink); }
html.kexue-huabao .faq-item[open] summary::after { content: "▴"; }
html.kexue-huabao .faq-item p { padding: 0 16px 14px; font-size: 0.9rem; line-height: 1.85; color: var(--kh-ink-soft); }
html.kexue-huabao .cta-section { margin: 30px 0; }
html.kexue-huabao .cta-box { border: 3px double var(--kh-ink); padding: 26px 24px; text-align: center; margin: 30px 0; }
html.kexue-huabao .cta-box h3 { font-size: 1.3rem; font-weight: 900; margin-bottom: 12px; font-family: var(--kh-sans); color: var(--kh-ink); }
html.kexue-huabao .cta-box p { font-size: 0.9rem; color: var(--kh-ink-soft); margin-bottom: 16px; }
html.kexue-huabao .cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
html.kexue-huabao .cta-btn {
  display: inline-block; padding: 10px 26px; background: var(--kh-ink); color: var(--kh-paper);
  text-decoration: none; font-size: 0.9rem; font-weight: 700; letter-spacing: 0.08em;
  border: 1px solid var(--kh-ink);
}
html.kexue-huabao .cta-btn:hover { background: var(--kh-paper); color: var(--kh-ink); }
html.kexue-huabao .cta-btn-ghost { background: transparent; color: var(--kh-ink); }

/* ---------- 9e. 参考资料 · 新模板 ---------- */
html.kexue-huabao .refs-box { margin: 28px 0; }
html.kexue-huabao .refs-box ul { list-style: none; padding: 0; margin: 0; }
html.kexue-huabao .refs-box li { font-size: 0.88rem; color: var(--kh-ink); line-height: 1.7; margin-bottom: 9px; border-bottom: 1px dotted var(--kh-ink); padding-bottom: 7px; }
html.kexue-huabao .refs-box a { color: var(--kh-ink); text-decoration: underline; text-underline-offset: 2px; }
html.kexue-huabao .refs-box a:hover { color: var(--kh-ink-soft); }
html.kexue-huabao .media-tag { font-weight: 700; color: var(--kh-ink); }

/* ---------- 10. 声明与页脚 ---------- */
html.kexue-huabao .disclosure { border-top: 1px solid var(--kh-ink); border-bottom: 1px solid var(--kh-ink); padding: 18px 0; margin: 26px 0; font-size: 0.85rem; color: var(--kh-ink-soft); text-align: center; line-height: 1.9; }
html.kexue-huabao .disclosure .author { color: var(--kh-ink); font-weight: 700; }
html.kexue-huabao footer { background: var(--kh-ink); color: var(--kh-paper); border-top: 4px double var(--kh-gold); padding: 40px 5% 32px; }
html.kexue-huabao footer p { color: var(--kh-taupe); }
html.kexue-huabao footer a { color: var(--kh-paper); text-decoration: underline; text-underline-offset: 3px; }
html.kexue-huabao footer a:hover { color: var(--kh-gold); }

/* ---------- 11. 行业/组织页 ---------- */
html.kexue-huabao .org-hero { background: var(--kh-paper); color: var(--kh-ink); border-bottom: 3px double var(--kh-line); }
html.kexue-huabao .org-hero::before, html.kexue-huabao .org-hero::after { display: none; }
html.kexue-huabao .feature-header { font-family: var(--kh-serif); }
html.kexue-huabao .blog-post { background: var(--kh-paper-light); border: 1px solid var(--kh-line-soft); border-radius: 0; box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.08); }
html.kexue-huabao .blog-post h2 { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); }
html.kexue-huabao .blog-post a { text-decoration: none; }
html.kexue-huabao .back-link { color: var(--kh-ink); font-weight: 700; }

/* ---------- 12. 主题切换按钮 ---------- */
#kh-theme-toggle {
  position: fixed; bottom: 22px; right: 22px; z-index: 9999;
  padding: 10px 16px; font-family: var(--kh-serif); font-size: 13px; letter-spacing: 0.12em;
  color: var(--kh-paper); background: var(--kh-ink); border: 1px solid var(--kh-line); border-radius: 0;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.3); cursor: pointer; transition: background 0.2s, color 0.2s;
}
#kh-theme-toggle:hover { background: var(--kh-paper); color: var(--kh-ink); }

/* ---------- 13. 移动端 ---------- */
@media (max-width: 767px) {
  html.kexue-huabao .cols2 { column-count: 1; }
  html.kexue-huabao .navbar-links { display: none; }
  html.kexue-huabao .masthead-title { font-size: clamp(26px, 8vw, 40px); }
  html.kexue-huabao .body p:first-child::first-letter { font-size: 2.6rem; }
  html.kexue-huabao .hero { padding: 40px 5% 28px; }
  html.kexue-huabao section { padding: 40px 5%; }
  html.kexue-huabao .article-content p { font-size: 16px; line-height: 1.95; }
}

/* ---------- 14. 辅助 class ---------- */
html.kexue-huabao .takeaway-en { font-weight: 400; font-size: 0.8rem; color: var(--kh-ink-soft); }
html.kexue-huabao .refs-note { font-size: 0.8rem; color: var(--kh-ink-soft); margin-bottom: 12px; }
html.kexue-huabao .disclosure-note { margin-top: 8px; }
html.kexue-huabao .back-link { margin-top: 8px; font-weight: 700; }
html.kexue-huabao .blog-excerpt { font-size: 14px; color: var(--kh-ink-soft); line-height: 1.7; margin-top: 8px; }

/* ---------- 15. 旧模板容器补齐（CSS checker 审计补全）---------- */
html.kexue-huabao nav { position: static !important; background: var(--kh-paper) !important; border-bottom: 1px solid var(--kh-ink); padding: 12px 5%; backdrop-filter: none !important; -webkit-backdrop-filter: none !important; box-shadow: none !important; }
html.kexue-huabao .nav-inner { max-width: 1080px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
html.kexue-huabao .hero-stat { display: flex; gap: 0; justify-content: center; margin: 22px 0 6px; border-top: 1px solid var(--kh-line); border-bottom: 1px solid var(--kh-line); padding: 14px 0; }
html.kexue-huabao .hero-stat-item { flex: 1; max-width: 200px; text-align: center; border-right: 1px solid var(--kh-line-soft); padding: 0 12px; }
html.kexue-huabao .hero-stat-item:last-child { border-right: none; }
html.kexue-huabao .hero-stat-num { display: block; font-size: 1.8rem; }
html.kexue-huabao .hero-stat-label { display: block; font-size: 0.7rem; margin-top: 4px; }
html.kexue-huabao .section-inner { max-width: 1080px; margin: 0 auto; padding: 28px 5%; }
html.kexue-huabao .reveal { opacity: 1 !important; transform: none !important; }
html.kexue-huabao .case-rows { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 12px; }
html.kexue-huabao .faq-list { display: block; }

/* ---------- 16. 动画延迟 + 历史主题切换兜底 ---------- */
html.kexue-huabao .reveal-delay-1 { transition-delay: 0.08s; }
html.kexue-huabao .reveal-delay-2 { transition-delay: 0.16s; }
html.kexue-huabao .reveal-delay-3 { transition-delay: 0.24s; }
html.kexue-huabao .theme-toggle { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--kh-ink); background: var(--kh-paper); color: var(--kh-ink); font-family: var(--kh-sans); font-size: 0.78rem; padding: 3px 10px; cursor: pointer; }

/* ---------- 17. 博客列表/分页页（报纸版卡片）---------- */
html.kexue-huabao .breadcrumb { max-width: 1080px; margin: 18px auto 0; padding: 0 5%; font-family: var(--kh-serif); font-size: 0.8rem; color: var(--kh-taupe); }
html.kexue-huabao .breadcrumb a { color: var(--kh-ink-soft); text-decoration: none; }
html.kexue-huabao .breadcrumb a:hover { color: var(--kh-ink); }
html.kexue-huabao .sibling-links { display: flex; gap: 18px; flex-wrap: wrap; }
html.kexue-huabao .sibling-links a { font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.12em; color: var(--kh-ink); border-bottom: 2px solid var(--kh-ink); padding-bottom: 2px; text-decoration: none; }
html.kexue-huabao .sibling-links a:hover { color: var(--kh-ink-soft); border-bottom-color: var(--kh-ink-soft); }
html.kexue-huabao .blog-list { max-width: 1080px; margin: 0 auto; padding: 32px 5%; display: block; }
html.kexue-huabao .blog-post { background: var(--kh-paper) !important; border: 1px solid var(--kh-line-soft) !important; border-left: 4px solid var(--kh-ink) !important; border-radius: 0 !important; padding: 22px 24px !important; margin-bottom: 18px !important; box-shadow: none !important; cursor: pointer; transition: none !important; }
html.kexue-huabao .blog-post:hover { transform: none !important; box-shadow: none !important; background: var(--kh-paper-dark) !important; }
html.kexue-huabao .blog-post h2 { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); font-size: 1.15rem; line-height: 1.5; margin-bottom: 8px; }
html.kexue-huabao .blog-post h2 a { color: var(--kh-ink); text-decoration: none; }
html.kexue-huabao .blog-post h2 a:hover { text-decoration: underline; }
html.kexue-huabao .blog-meta { font-family: var(--kh-sans); font-size: 0.75rem; color: var(--kh-taupe); margin-bottom: 10px; }
html.kexue-huabao .blog-meta .tag { display: inline-block; background: var(--kh-ink) !important; color: var(--kh-paper) !important; border-radius: 0 !important; padding: 2px 10px; font-size: 0.68rem; letter-spacing: 0.1em; font-weight: 700; margin-right: 8px; }
html.kexue-huabao .blog-excerpt { font-family: var(--kh-serif); font-size: 0.9rem; color: var(--kh-ink-soft); line-height: 1.8; }
html.kexue-huabao .pagination { max-width: 1080px; margin: 0 auto 50px; padding: 10px 5% 0; display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap; }
html.kexue-huabao .pagination a, html.kexue-huabao .pagination span { display: inline-block; padding: 6px 14px; font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; color: var(--kh-ink); border: 1px solid var(--kh-ink); background: var(--kh-paper); text-decoration: none; }
html.kexue-huabao .pagination a:hover { background: var(--kh-ink); color: var(--kh-paper); }
html.kexue-huabao .pagination .current { background: var(--kh-ink) !important; color: var(--kh-paper) !important; border-color: var(--kh-ink); }
html.kexue-huabao .pagination .disabled { opacity: 0.4; pointer-events: none; }
html.kexue-huabao .back-link { font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.1em; color: var(--kh-ink); text-align: center; display: block; padding: 0 5% 40px; text-decoration: none; }
html.kexue-huabao .back-link:hover { text-decoration: underline; }
html.kexue-huabao .blog-list .blog-post .blog-excerpt { text-indent: 0; }

/* ============================================================
   tom-design · 科学画报彩色版式（#kh-theme-toggle 切换）
   作用域：html.tom-design（kexue-huabao.js 切换）
   与 kexue-huabao 共享骨架，仅换彩色印刷风格
   ============================================================ */

/* ---------- 1b. 调色板 · 科学画报彩色 ---------- */
html.tom-design {
  --kh-paper: #ffffff;          /* 光面纸白 */
  --kh-paper-dark: #f3f1ec;     /* 暖灰 */
  --kh-paper-light: #ffffff;
  --kh-ink: #121212;            /* 墨黑 */
  --kh-ink-soft: #3f3f3c;
  --kh-red: #c8102e;            /* 报头红 */
  --kh-red-dark: #9c0b24;
  --kh-gold: #f4a300;           /* 琥珀黄 */
  --kh-teal: #0d7377;           /* 青绿 */
  --kh-blue: #0066cc;           /* 深蓝 */
  --kh-green: #00875a;          /* 草绿 */
  --kh-orange: #ff6b35;         /* 橙 */
  --kh-purple: #6b46c1;         /* 紫 */
  --kh-taupe: #8a8a85;
  --kh-line: rgba(18, 18, 18, 0.6);
  --kh-line-soft: rgba(18, 18, 18, 0.2);
  --kh-serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", "Georgia", "Times New Roman", serif;
  --kh-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;

  --orange: var(--kh-orange);
  --charcoal: var(--kh-ink);
  --cream: var(--kh-paper);
  --smoke: var(--kh-paper-dark);
  --white: var(--kh-paper-light);
  --gold: var(--kh-gold);
  --cognac: var(--kh-orange);
  --taupe: var(--kh-taupe);
  --warm-shadow: 0 3px 14px rgba(200, 16, 46, 0.12);
  --font: var(--kh-serif);
  --serif: var(--kh-serif);
}

/* ---------- 2b. 纸面 · 全局 ---------- */
html.tom-design body {
  background-color: var(--kh-paper) !important;
  background-image:
    radial-gradient(ellipse at 15% -5%, rgba(200, 16, 46, 0.05), transparent 55%),
    radial-gradient(ellipse at 85% 0%, rgba(0, 102, 204, 0.04), transparent 50%);
  color: var(--kh-ink) !important;
  font-family: var(--kh-serif) !important;
  line-height: 1.85 !important;
  letter-spacing: 0.02em;
}
html.tom-design a { color: var(--kh-blue); text-decoration: underline; text-underline-offset: 3px; }
html.tom-design a:hover { color: var(--kh-red); }

/* ---------- 3c. 导航 · 旧/新结构 ---------- */
html.tom-design nav {
  background: var(--kh-paper) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-bottom: 3px double var(--kh-red) !important;
  box-shadow: none;
}
html.tom-design .nav-logo { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.1em; color: var(--kh-red); font-size: 22px; }
html.tom-design .nav-logo span { color: var(--kh-blue); }
html.tom-design .nav-links a { font-family: var(--kh-serif); font-size: 13.5px; letter-spacing: 0.14em; color: var(--kh-ink-soft); font-weight: 700; }
html.tom-design .nav-links a:hover { color: var(--kh-red); }
html.tom-design .lang-switch { background: var(--kh-paper); border: 1px solid var(--kh-line); border-radius: 0; font-family: var(--kh-serif); }
html.tom-design .lang-switch a { color: var(--kh-ink-soft); }
html.tom-design .lang-switch a.active { background: var(--kh-red); color: var(--kh-paper); }
html.tom-design .topline { border-bottom: 1px solid var(--kh-line); padding: 8px 0; background: var(--kh-paper-dark); }
html.tom-design .topline-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--kh-ink-soft); letter-spacing: 0.08em; }
html.tom-design .topline-links { display: flex; gap: 18px; }
html.tom-design .topline-links a { color: var(--kh-ink-soft); text-decoration: none; }
html.tom-design .topline-links a:hover { color: var(--kh-red); text-decoration: underline; }
html.tom-design .navbar { border-bottom: 2px solid var(--kh-red); background: var(--kh-paper); position: sticky; top: 0; z-index: 100; }
html.tom-design .navbar-inner { max-width: 1080px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
html.tom-design .navbar-links { display: flex; gap: 20px; list-style: none; flex-wrap: wrap; padding: 0; }
html.tom-design .navbar-links a { font-size: 0.85rem; font-weight: 700; color: var(--kh-ink); text-decoration: none; letter-spacing: 0.08em; border-bottom: 2px solid transparent; padding-bottom: 2px; }
html.tom-design .navbar-links a:hover { border-bottom-color: var(--kh-red); color: var(--kh-red); }
html.tom-design .navbar-search { display: flex; gap: 0; }
html.tom-design .navbar-search input { padding: 4px 10px; font-size: 0.8rem; border: 1px solid var(--kh-blue); background: var(--kh-paper); font-family: inherit; outline: none; width: 160px; color: var(--kh-ink); }
html.tom-design .navbar-search button { padding: 4px 14px; border: 1px solid var(--kh-red); background: var(--kh-red); color: #fff; font-family: inherit; font-size: 0.8rem; cursor: pointer; }

/* ---------- 4c. 报头 · 旧 hero / 新 masthead ---------- */
html.tom-design .hero { background: linear-gradient(180deg, rgba(200,16,46,0.05), transparent 60%) !important; min-height: auto; padding: 60px 5% 40px; border-bottom: 4px double var(--kh-red); }
html.tom-design .hero::before, html.tom-design .hero::after { display: none; }
html.tom-design .hero-eyebrow { color: var(--kh-red); font-family: var(--kh-serif); letter-spacing: 0.45em; text-transform: uppercase; text-indent: 0.45em; font-weight: 700; }
html.tom-design .hero h1 { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.02em; color: var(--kh-ink); }
html.tom-design .hero h1 .highlight, html.tom-design .hero h1 .highlight-gold { color: var(--kh-red); font-style: normal; }
html.tom-design .hero-sub { font-weight: 400; color: var(--kh-ink-soft); }
html.tom-design .hero-date { color: var(--kh-taupe); }
html.tom-design .hero-stat-num { font-family: var(--kh-serif); font-style: normal; font-weight: 900; color: var(--kh-blue); }
html.tom-design .hero-stat-label { letter-spacing: 0.25em; color: var(--kh-taupe); }
html.tom-design .masthead { border-bottom: 4px double var(--kh-red); padding: 26px 0 20px; text-align: center; background: linear-gradient(180deg, rgba(200,16,46,0.06), transparent 70%); }
html.tom-design .masthead-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
html.tom-design .masthead-title { font-family: var(--kh-serif); font-weight: 900; letter-spacing: 0.12em; font-size: clamp(34px, 5.5vw, 58px); color: var(--kh-ink); line-height: 1.2; }
html.tom-design .masthead-title .accent { color: var(--kh-red); }
html.tom-design .masthead-sub { margin-top: 6px; font-size: 0.8rem; color: var(--kh-ink-soft); letter-spacing: 0.25em; }

/* ---------- 5b. 章节 ---------- */
html.tom-design section { padding: 56px 5%; }
html.tom-design .section-alt { background: var(--kh-paper-dark); border-top: 1px solid var(--kh-line-soft); border-bottom: 1px solid var(--kh-line-soft); }
html.tom-design .section-label { color: var(--kh-red); font-family: var(--kh-serif); letter-spacing: 0.35em; text-indent: 0.35em; text-transform: uppercase; font-weight: 900; }
html.tom-design .section-label::after { content: "——"; margin-left: 10px; color: var(--kh-blue); opacity: 0.7; }
html.tom-design .section-title { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); }
html.tom-design .section-title .gold { color: var(--kh-gold); font-style: normal; }
html.tom-design .section-desc { color: var(--kh-ink-soft); }

/* ---------- 6b. 卡片 ---------- */
html.tom-design .card { background: var(--kh-paper-light); border: 1px solid var(--kh-line-soft); border-top: 4px solid var(--kh-blue); border-radius: 0; box-shadow: 2px 2px 0 rgba(0, 102, 204, 0.15); }
html.tom-design .card:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 rgba(200, 16, 46, 0.18); }
html.tom-design .card-num { font-family: var(--kh-serif); font-style: normal; color: var(--kh-red); }
html.tom-design .card h3 { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); }
html.tom-design .card p { color: var(--kh-ink-soft); text-align: justify; }

/* ---------- 7b. 引用框 ---------- */
html.tom-design .highlight-box { background: var(--kh-paper-light); border: 1px solid var(--kh-line); border-left: 4px double var(--kh-red); border-radius: 0; box-shadow: none; position: relative; }
html.tom-design .highlight-box::before { content: "❝"; position: absolute; top: 8px; left: 12px; font-family: Georgia, serif; font-size: 40px; line-height: 1; color: var(--kh-red); opacity: 0.35; }
html.tom-design .highlight-box .quote { font-family: var(--kh-serif); color: var(--kh-ink); text-align: justify; }

/* ---------- 8b. 分隔线 ---------- */
html.tom-design .divider { height: 0; background: transparent !important; border-top: 1px solid var(--kh-line); border-bottom: 1px solid var(--kh-paper-dark); border-radius: 0; position: relative; margin: 26px 0 34px; }
html.tom-design .divider::before { content: "◆"; position: absolute; top: -11px; left: 0; font-size: 11px; color: var(--kh-red); }

/* ---------- 9f. 正文 ---------- */
html.tom-design .article-content { max-width: 780px; }
html.tom-design .article-content p {
  font-family: var(--kh-serif); font-size: 17px; line-height: 2.05; color: var(--kh-ink);
  text-align: justify; text-indent: 2em; margin-bottom: 1.6em; letter-spacing: 0.015em;
}
html.tom-design .article-content p:first-of-type::first-letter {
  float: left; font-size: 3.2em; line-height: 0.85; padding: 4px 8px 0 0;
  font-weight: 900; color: var(--kh-red); font-family: var(--kh-serif);
}
html.tom-design .main { max-width: 1080px; margin: 0 auto; padding: 28px 20px 48px; }
html.tom-design .pagehead { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
html.tom-design .page-num { font-size: 0.8rem; font-style: italic; color: var(--kh-ink-soft); }
html.tom-design .section-tag { display: inline-block; background: var(--kh-blue); color: #fff; padding: 2px 12px; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; font-family: var(--kh-sans); }
html.tom-design .thick-rule { border-top: 3px solid var(--kh-ink); border-bottom: 1px solid var(--kh-ink); height: 5px; margin-bottom: 22px; }
html.tom-design .double-rule { border-top: 1px solid var(--kh-ink); border-bottom: 3px solid var(--kh-ink); height: 5px; margin: 30px 0; }
html.tom-design .headline { font-family: var(--kh-serif); font-weight: 900; line-height: 1.25; letter-spacing: -0.01em; font-size: clamp(26px, 4vw, 42px); margin: 16px 0 8px; color: var(--kh-ink); }
html.tom-design .subheadline { font-size: clamp(15px, 1.8vw, 18px); color: var(--kh-ink-soft); font-style: italic; margin-bottom: 18px; font-weight: 500; }
html.tom-design .byline { font-size: 0.85rem; color: var(--kh-ink); margin-bottom: 20px; font-weight: 700; letter-spacing: 0.06em; }
html.tom-design .byline .sep { color: var(--kh-taupe); margin: 0 8px; }
html.tom-design .tag-chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 18px; }
html.tom-design .chip { display: inline-block; padding: 2px 12px; font-size: 0.78rem; font-weight: 700; border: 1px solid var(--kh-blue); color: var(--kh-blue); background: var(--kh-paper); font-family: var(--kh-sans); }
html.tom-design .chip-ind { background: var(--kh-red); color: #fff; border-color: var(--kh-red); }
html.tom-design .chip-scene { border-style: double; border-color: var(--kh-green); color: var(--kh-green); }
html.tom-design .chip-tech { border-style: dashed; border-color: var(--kh-purple); color: var(--kh-purple); }
html.tom-design .body { font-size: 0.95rem; line-height: 1.9; text-align: justify; color: var(--kh-ink); }
html.tom-design .body p { margin-bottom: 16px; text-indent: 0; }
html.tom-design .body p:first-child::first-letter {
  font-size: 3.2rem; font-weight: 900; float: left; line-height: 0.85;
  margin-right: 0.45rem; margin-top: 0.35rem; color: var(--kh-red);
}
html.tom-design .cols2 { column-count: 2; column-rule: 1px solid var(--kh-line); column-gap: 2rem; }
html.tom-design .pull-quote {
  font-size: clamp(17px, 2vw, 22px); font-weight: 700; line-height: 1.5; text-align: center;
  border-top: 3px double var(--kh-red); border-bottom: 3px double var(--kh-blue);
  padding: 18px 0; margin: 28px 0; color: var(--kh-ink);
}

/* ---------- 9g. 案例速览 ---------- */
html.tom-design .case-summary { border: 2px solid var(--kh-blue); margin: 22px 0; }
html.tom-design .case-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
html.tom-design .case-table th { background: var(--kh-blue); color: #fff; padding: 8px 14px; font-family: var(--kh-sans); font-weight: 700; text-align: left; }
html.tom-design .case-table td { padding: 10px 14px; border-bottom: 1px solid var(--kh-line-soft); }
html.tom-design .case-value { font-weight: 700; color: var(--kh-red); }
html.tom-design .case-box { border: 2px solid var(--kh-blue); margin: 22px 0; }
html.tom-design .case-box-head { background: var(--kh-blue); color: #fff; padding: 8px 14px; font-family: var(--kh-sans); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.15em; }
html.tom-design .case-row { display: flex; gap: 14px; padding: 12px 16px; border-bottom: 1px solid var(--kh-line); font-size: 0.9rem; }
html.tom-design .case-row:last-child { border-bottom: none; }
html.tom-design .case-label { flex: 0 0 84px; font-weight: 700; color: var(--kh-blue); font-size: 0.8rem; padding-top: 2px; }

/* ---------- 9h. 要点 / FAQ / CTA ---------- */
html.tom-design .takeaway-box { border: 1px solid var(--kh-blue); padding: 20px 22px; margin: 24px 0; background: var(--kh-paper-dark); border-top: 4px solid var(--kh-red); }
html.tom-design .takeaway-box h2, html.tom-design .faq-box h2, html.tom-design .refs-box h2 {
  font-size: 1.1rem; font-weight: 900; margin-bottom: 14px; font-family: var(--kh-sans);
  border-bottom: 1px solid var(--kh-blue); padding-bottom: 8px; color: var(--kh-ink);
}
html.tom-design .takeaway-list { list-style: none; padding: 0; margin: 0; }
html.tom-design .takeaway-list li { position: relative; padding-left: 24px; margin-bottom: 10px; font-size: 0.92rem; line-height: 1.8; color: var(--kh-ink); }
html.tom-design .takeaway-list li::before { content: "■"; position: absolute; left: 0; top: 2px; color: var(--kh-red); font-size: 0.7rem; }
html.tom-design .faq-box { margin: 26px 0; }
html.tom-design .faq-block { margin: 26px 0; border: 1px solid var(--kh-line-soft); }
html.tom-design .faq-item { border: 1px solid var(--kh-blue); border-bottom: none; }
html.tom-design .faq-item:last-child { border-bottom: 1px solid var(--kh-blue); }
html.tom-design .faq-item summary { cursor: pointer; padding: 13px 16px; font-weight: 700; font-size: 0.95rem; list-style: none; font-family: var(--kh-sans); color: var(--kh-ink); }
html.tom-design .faq-item summary::-webkit-details-marker { display: none; }
html.tom-design .faq-item summary::after { content: "▾"; float: right; color: var(--kh-red); }
html.tom-design .faq-item[open] summary::after { content: "▴"; }
html.tom-design .faq-item p { padding: 0 16px 14px; font-size: 0.9rem; line-height: 1.85; color: var(--kh-ink-soft); }
html.tom-design .cta-section { margin: 30px 0; }
html.tom-design .cta-box { border: 3px double var(--kh-red); padding: 26px 24px; text-align: center; margin: 30px 0; background: linear-gradient(180deg, rgba(200,16,46,0.04), transparent); }
html.tom-design .cta-box h3 { font-size: 1.3rem; font-weight: 900; margin-bottom: 12px; font-family: var(--kh-sans); color: var(--kh-ink); }
html.tom-design .cta-box p { font-size: 0.9rem; color: var(--kh-ink-soft); margin-bottom: 16px; }
html.tom-design .cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
html.tom-design .cta-btn { display: inline-block; padding: 10px 26px; background: var(--kh-red); color: #fff; text-decoration: none; font-size: 0.9rem; font-weight: 700; letter-spacing: 0.08em; border: 1px solid var(--kh-red); }
html.tom-design .cta-btn:hover { background: var(--kh-blue); border-color: var(--kh-blue); color: #fff; }
html.tom-design .cta-btn-ghost { background: transparent; color: var(--kh-red); border-color: var(--kh-blue); }

/* ---------- 9i. 参考资料 ---------- */
html.tom-design .refs-box { margin: 28px 0; }
html.tom-design .refs-box ul { list-style: none; padding: 0; margin: 0; }
html.tom-design .refs-box li { font-size: 0.88rem; color: var(--kh-ink); line-height: 1.7; margin-bottom: 9px; border-bottom: 1px dotted var(--kh-blue); padding-bottom: 7px; }
html.tom-design .refs-box a { color: var(--kh-blue); text-decoration: underline; text-underline-offset: 2px; }
html.tom-design .refs-box a:hover { color: var(--kh-red); }
html.tom-design .media-tag { font-weight: 700; color: var(--kh-red); }

/* ---------- 10b. 声明与页脚 ---------- */
html.tom-design .disclosure { border-top: 1px solid var(--kh-blue); border-bottom: 1px solid var(--kh-blue); padding: 18px 0; margin: 26px 0; font-size: 0.85rem; color: var(--kh-ink-soft); text-align: center; line-height: 1.9; }
html.tom-design .disclosure .author { color: var(--kh-red); font-weight: 700; }
html.tom-design footer { background: var(--kh-ink); color: #fff; border-top: 4px double var(--kh-gold); padding: 40px 5% 32px; }
html.tom-design footer p { color: var(--kh-taupe); }
html.tom-design footer a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
html.tom-design footer a:hover { color: var(--kh-gold); }

/* ---------- 11b. 行业/组织页 ---------- */
html.tom-design .org-hero { background: linear-gradient(180deg, rgba(200,16,46,0.05), transparent); color: var(--kh-ink); border-bottom: 3px double var(--kh-red); }
html.tom-design .org-hero::before, html.tom-design .org-hero::after { display: none; }
html.tom-design .feature-header { font-family: var(--kh-serif); }

/* ---------- 15b. 旧模板容器 ---------- */
html.tom-design nav { position: static !important; background: var(--kh-paper) !important; border-bottom: 2px solid var(--kh-blue); padding: 12px 5%; backdrop-filter: none !important; -webkit-backdrop-filter: none !important; box-shadow: none !important; }
html.tom-design .nav-inner { max-width: 1080px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
html.tom-design .hero-stat { display: flex; gap: 0; justify-content: center; margin: 22px 0 6px; border-top: 1px solid var(--kh-line); border-bottom: 1px solid var(--kh-line); padding: 14px 0; }
html.tom-design .hero-stat-item { flex: 1; max-width: 200px; text-align: center; border-right: 1px solid var(--kh-line-soft); padding: 0 12px; }
html.tom-design .hero-stat-item:last-child { border-right: none; }
html.tom-design .hero-stat-num { display: block; font-size: 1.8rem; }
html.tom-design .hero-stat-label { display: block; font-size: 0.7rem; margin-top: 4px; }
html.tom-design .section-inner { max-width: 1080px; margin: 0 auto; padding: 28px 5%; }
html.tom-design .reveal { opacity: 1 !important; transform: none !important; }
html.tom-design .case-rows { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 12px; }
html.tom-design .faq-list { display: block; }
html.tom-design .reveal-delay-1 { transition-delay: 0.08s; }
html.tom-design .reveal-delay-2 { transition-delay: 0.16s; }
html.tom-design .reveal-delay-3 { transition-delay: 0.24s; }

/* ---------- 17b. 博客列表/分页页 · 彩色卡片 ---------- */
html.tom-design .breadcrumb { max-width: 1080px; margin: 18px auto 0; padding: 0 5%; font-family: var(--kh-serif); font-size: 0.8rem; color: var(--kh-taupe); }
html.tom-design .breadcrumb a { color: var(--kh-blue); text-decoration: none; }
html.tom-design .breadcrumb a:hover { color: var(--kh-red); }
html.tom-design .sibling-links { display: flex; gap: 18px; flex-wrap: wrap; }
html.tom-design .sibling-links a { font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.12em; color: var(--kh-red); border-bottom: 2px solid var(--kh-red); padding-bottom: 2px; text-decoration: none; }
html.tom-design .sibling-links a:hover { color: var(--kh-blue); border-bottom-color: var(--kh-blue); }
html.tom-design .blog-list { max-width: 1080px; margin: 0 auto; padding: 32px 5%; display: block; }
html.tom-design .blog-post { background: var(--kh-paper) !important; border: 1px solid var(--kh-line-soft) !important; border-left: 4px solid var(--kh-blue) !important; border-radius: 0 !important; padding: 22px 24px !important; margin-bottom: 18px !important; box-shadow: none !important; cursor: pointer; transition: none !important; }
html.tom-design .blog-post:hover { transform: none !important; box-shadow: none !important; background: var(--kh-paper-dark) !important; }
html.tom-design .blog-post h2 { font-family: var(--kh-serif); font-weight: 900; color: var(--kh-ink); font-size: 1.15rem; line-height: 1.5; margin-bottom: 8px; }
html.tom-design .blog-post h2 a { color: var(--kh-ink); text-decoration: none; }
html.tom-design .blog-post h2 a:hover { color: var(--kh-red); text-decoration: underline; }
html.tom-design .blog-meta { font-family: var(--kh-sans); font-size: 0.75rem; color: var(--kh-taupe); margin-bottom: 10px; }
html.tom-design .blog-meta .tag { display: inline-block; background: var(--kh-red) !important; color: #fff !important; border-radius: 0 !important; padding: 2px 10px; font-size: 0.68rem; letter-spacing: 0.1em; font-weight: 700; margin-right: 8px; }
html.tom-design .blog-excerpt { font-family: var(--kh-serif); font-size: 0.9rem; color: var(--kh-ink-soft); line-height: 1.8; }
html.tom-design .pagination { max-width: 1080px; margin: 0 auto 50px; padding: 10px 5% 0; display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap; }
html.tom-design .pagination a, html.tom-design .pagination span { display: inline-block; padding: 6px 14px; font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; color: var(--kh-blue); border: 1px solid var(--kh-blue); background: var(--kh-paper); text-decoration: none; }
html.tom-design .pagination a:hover { background: var(--kh-blue); color: #fff; }
html.tom-design .pagination .current { background: var(--kh-red) !important; color: #fff !important; border-color: var(--kh-red); }
html.tom-design .pagination .disabled { opacity: 0.4; pointer-events: none; }
html.tom-design .back-link { font-family: var(--kh-serif); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.1em; color: var(--kh-red); text-align: center; display: block; padding: 0 5% 40px; text-decoration: none; }
html.tom-design .back-link:hover { text-decoration: underline; }
html.tom-design .blog-list .blog-post .blog-excerpt { text-indent: 0; }

/* ---------- 18. 辅助 class · 科学画报版 ---------- */
html.tom-design .takeaway-en { font-weight: 400; font-size: 0.8rem; color: var(--kh-ink-soft); }
html.tom-design .refs-note { font-size: 0.8rem; color: var(--kh-ink-soft); margin-bottom: 12px; }
html.tom-design .disclosure-note { margin-top: 8px; }
html.tom-design .back-link { margin-top: 8px; font-weight: 700; }
html.tom-design .blog-excerpt { font-size: 14px; color: var(--kh-ink-soft); line-height: 1.7; margin-top: 8px; }
html.tom-design .theme-toggle { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--kh-blue); background: var(--kh-paper); color: var(--kh-blue); font-family: var(--kh-sans); font-size: 0.78rem; padding: 3px 10px; cursor: pointer; }