:root {
      --color-bg: #f8f6f0;
      --color-dark: #1a1a1a;
      --color-gold: #c9a227;
      --color-gold-light: #e3c96d;
      --color-text: #2c2c2a;
      --color-text-muted: #5f5e5a;
      --color-card: #ffffff;
      --color-red: #8b2635;
      --color-green: #2d5a4a;
      --color-border: rgba(0,0,0,0.08);
      --radius: 12px;
      --shadow: 0 8px 30px rgba(0,0,0,0.08);
      --shadow-hover: 0 16px 45px rgba(0,0,0,0.12);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'Noto Serif SC', 'Source Han Serif SC', 'SimSun', 'STSong', Georgia, serif;
      background: var(--color-bg);
      color: var(--color-text);
      line-height: 1.8;
      overflow-x: hidden;
    }

    /* Blog top nav */
    nav.blog-nav {
      position: fixed;
      top: 0; left: 0; width: 100%;
      z-index: 100;
      padding: 1rem 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(26, 26, 26, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0,0,0,0.15);
    }
    nav.blog-nav .logo {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--color-gold);
      letter-spacing: 0.05em;
      text-decoration: none;
    }
    nav.blog-nav .logo span { color: rgba(255,255,255,0.5); font-weight: 400; font-size: 0.85rem; }
    nav.blog-nav ul { display: flex; list-style: none; gap: 1.75rem; }
    nav.blog-nav a.link {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      transition: color 0.2s;
    }
    nav.blog-nav a.link:hover { color: var(--color-gold-light); }
    nav.blog-nav .back-home {
      color: var(--color-gold);
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      padding: 0.4rem 0.9rem;
      border: 1px solid var(--color-gold);
      border-radius: 20px;
      transition: all 0.2s;
    }
    nav.blog-nav .back-home:hover { background: var(--color-gold); color: #1a1a1a; }
    .mobile-menu-btn { display: none; background: none; border: none; color: var(--color-gold); font-size: 1.5rem; cursor: pointer; }

    /* Breadcrumb */
    .breadcrumb {
      padding: 6rem 5% 0;
      max-width: 1200px;
      margin: 0 auto;
    }
    .breadcrumb a {
      color: var(--color-text-muted);
      text-decoration: none;
      font-size: 0.85rem;
    }
    .breadcrumb a:hover { color: var(--color-gold); }
    .breadcrumb span { color: var(--color-text-muted); font-size: 0.85rem; margin: 0 0.5rem; }
    .breadcrumb .current { color: var(--color-text); }

    /* Article meta */
    .article-meta {
      max-width: 1200px;
      margin: 1rem auto 0;
      padding: 0 5%;
    }
    .article-meta .tag {
      display: inline-block;
      background: var(--color-gold);
      color: #1a1a1a;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.75rem;
      border-radius: 4px;
      letter-spacing: 0.05em;
    }
    .article-meta .read-time {
      color: var(--color-text-muted);
      font-size: 0.85rem;
      margin-left: 0.75rem;
    }

    /* Hero */
    .hero {
      min-height: 80vh;
      background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      padding: 4rem 5% 4rem;
      margin-top: 1.5rem;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -50%; right: -20%;
      width: 80%; height: 150%;
      background: radial-gradient(circle, rgba(201,162,39,0.12) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-content { max-width: 900px; text-align: center; position: relative; z-index: 1; }
    .hero-subtitle-top {
      color: var(--color-gold);
      font-size: 0.95rem;
      letter-spacing: 0.3em;
      text-transform: uppercase;
      margin-bottom: 1.5rem;
      opacity: 0.9;
    }
    .hero h1 {
      font-size: clamp(3rem, 10vw, 6.5rem);
      font-weight: 700;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 0.5rem;
      letter-spacing: 0.08em;
    }
    .hero .tagline { font-size: clamp(1.25rem, 3vw, 2rem); color: var(--color-gold-light); margin-bottom: 1rem; font-weight: 600; }
    .hero .original-title { color: rgba(255,255,255,0.55); font-style: italic; font-size: 1rem; margin-bottom: 2.5rem; letter-spacing: 0.05em; }
    .hero .author { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 2rem; }
    .hero .author strong { color: var(--color-gold-light); font-weight: 700; }
    .hero-quote {
      max-width: 700px;
      margin: 0 auto 2.5rem;
      padding: 1.5rem 2rem;
      border-left: 3px solid var(--color-gold);
      background: rgba(255,255,255,0.05);
      color: rgba(255,255,255,0.85);
      font-size: 1.05rem;
      text-align: left;
      line-height: 1.9;
      border-radius: 0 8px 8px 0;
    }
    .hero-quote .source { display: block; margin-top: 0.75rem; color: var(--color-gold); font-size: 0.9rem; }

    /* Sections */
    section { padding: 5rem 5%; max-width: 1200px; margin: 0 auto; }
    .section-title { text-align: center; margin-bottom: 3.5rem; }
    .section-title h2 {
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 0.75rem;
      position: relative;
      display: inline-block;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -8px; left: 50%;
      transform: translateX(-50%);
      width: 60px; height: 3px;
      background: var(--color-gold);
    }
    .section-title p { color: var(--color-text-muted); font-size: 1.05rem; max-width: 600px; margin: 1.5rem auto 0; }

    /* About Author */
    .about-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; align-items: center; }
    .author-card { background: var(--color-card); border-radius: var(--radius); padding: 2.5rem; box-shadow: var(--shadow); text-align: center; border: 1px solid var(--color-border); }
    .author-avatar { width: 140px; height: 140px; border-radius: 50%; background: linear-gradient(135deg, var(--color-gold) 0%, #8b6914 100%); display: flex; align-items: center; justify-content: center; margin: 0 auto 1.5rem; font-size: 3.5rem; color: #fff; font-weight: 700; box-shadow: 0 8px 25px rgba(201,162,39,0.3); }
    .author-card h3 { font-size: 1.5rem; margin-bottom: 0.5rem; color: var(--color-dark); }
    .author-card .role { color: var(--color-gold); font-weight: 600; font-size: 0.95rem; margin-bottom: 1.5rem; }
    .author-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
    .stat-item { padding: 1rem; background: var(--color-bg); border-radius: 8px; }
    .stat-item .number { font-size: 1.5rem; font-weight: 700; color: var(--color-dark); display: block; }
    .stat-item .label { font-size: 0.8rem; color: var(--color-text-muted); }
    .about-text h3 { font-size: 1.8rem; margin-bottom: 1.5rem; color: var(--color-dark); }
    .about-text p { margin-bottom: 1.25rem; color: var(--color-text); font-size: 1.05rem; }
    .about-text .highlight { color: var(--color-gold); font-weight: 700; }

    /* Core Ideas */
    .ideas-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
    .idea-card { background: var(--color-card); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); border: 1px solid var(--color-border); transition: transform 0.3s, box-shadow 0.3s; position: relative; overflow: hidden; }
    .idea-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .idea-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--color-gold); }
    .idea-icon { font-size: 2rem; margin-bottom: 1rem; color: var(--color-gold); font-weight: 700; }
    .idea-card h3 { font-size: 1.25rem; margin-bottom: 0.75rem; color: var(--color-dark); }
    .idea-card p { color: var(--color-text-muted); font-size: 0.95rem; line-height: 1.8; }

    /* Chapters (interpretation) */
    .chapters-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
    .chapter-card { background: var(--color-card); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); border: 1px solid var(--color-border); transition: transform 0.3s, box-shadow 0.3s; }
    .chapter-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .chapter-number { display: inline-flex; width: 38px; height: 38px; border-radius: 50%; background: var(--color-dark); color: var(--color-gold-light); align-items: center; justify-content: center; font-weight: 700; font-size: 0.9rem; margin-bottom: 1rem; }
    .chapter-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; color: var(--color-dark); }
    .chapter-card p { color: var(--color-text-muted); font-size: 0.95rem; line-height: 1.85; }
    .chapter-card .note { display: block; margin-top: 0.9rem; padding-top: 0.9rem; border-top: 1px dashed var(--color-border); font-size: 0.88rem; color: var(--color-text); }
    .chapter-card .note b { color: var(--color-gold); }

    /* Quotes */
    .quotes-section { background: var(--color-dark); color: #fff; position: relative; }
    .quotes-section .section-title h2 { color: #fff; }
    .quotes-section .section-title h2::after { background: var(--color-gold); }
    .quotes-section .section-title p { color: rgba(255,255,255,0.6); }
    .quotes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
    .quote-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 2rem; position: relative; transition: transform 0.3s, background 0.3s; }
    .quote-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
    .quote-mark { font-size: 4rem; color: var(--color-gold); line-height: 1; margin-bottom: 0.5rem; font-family: Georgia, serif; }
    .quote-text { font-size: 1.02rem; line-height: 1.9; color: rgba(255,255,255,0.9); margin-bottom: 1rem; }
    .quote-source { color: var(--color-gold-light); font-size: 0.85rem; font-weight: 600; }

    /* Ben's takeaway */
    .takeaway {
      background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
      color: #fff;
      border-radius: var(--radius);
      padding: 3rem;
      max-width: 860px;
      margin: 4rem auto;
      box-shadow: var(--shadow);
      position: relative;
    }
    .takeaway::before { content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%; background: var(--color-gold); border-radius: var(--radius) 0 0 var(--radius); }
    .takeaway .label { color: var(--color-gold); font-size: 0.85rem; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 1rem; }
    .takeaway h3 { font-size: 1.6rem; margin-bottom: 1.25rem; color: #fff; }
    .takeaway p { color: rgba(255,255,255,0.85); margin-bottom: 1rem; line-height: 1.9; }
    .takeaway .sign { color: var(--color-gold-light); font-style: italic; margin-top: 1.5rem; }

    /* Footer */
    footer { background: var(--color-dark); color: rgba(255,255,255,0.7); text-align: center; padding: 3rem 5%; font-size: 0.9rem; }
    footer a { color: var(--color-gold); text-decoration: none; }
    footer .book-title { color: #fff; font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
    footer .back-link { display: inline-block; margin-top: 1rem; padding: 0.5rem 1.5rem; border: 1px solid var(--color-gold); border-radius: 24px; color: var(--color-gold); font-weight: 600; transition: all 0.2s; }
    footer .back-link:hover { background: var(--color-gold); color: #1a1a1a; }

    /* Reveal Animation */
    .js .reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
    .reveal.active { opacity: 1; transform: translateY(0); }

    /* Responsive */
    @media (max-width: 900px) {
      .about-grid { grid-template-columns: 1fr; gap: 2rem; }
    }
    @media (max-width: 768px) {
      nav.blog-nav ul { display: none; }
      .mobile-menu-btn { display: block; }
      .hero h1 { font-size: 2.8rem; }
      .hero-quote { padding: 1.25rem; font-size: 0.95rem; }
      section { padding: 3.5rem 5%; }
      .author-stats { grid-template-columns: 1fr; }
      .takeaway { padding: 2rem 1.5rem; }
    }
    @media (max-width: 480px) {
      .hero h1 { font-size: 2.2rem; }
      .ideas-grid, .chapters-grid, .quotes-grid { grid-template-columns: 1fr; }
    }

    /* Ben's takeaway cards (归纳 Ben 的看法的卡片) */
    .ben-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; margin: 1.5rem 0 0.5rem; }
    .ben-card { background: var(--color-card); border-radius: var(--radius); padding: 1.75rem; box-shadow: var(--shadow); border: 1px solid var(--color-border); transition: transform 0.3s, box-shadow 0.3s; position: relative; overflow: hidden; }
    .ben-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .ben-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--color-gold); }
    .ben-card h4 { font-size: 1.08rem; margin-bottom: 0.75rem; color: var(--color-dark); line-height: 1.55; font-weight: 700; }
    .ben-card p { color: var(--color-text); font-size: 0.97rem; line-height: 1.85; margin-bottom: 0; }