: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-blue: #2c4a6b;
      --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;
    }

    /* Navigation */
    nav {
      position: fixed;
      top: 0; left: 0; width: 100%;
      z-index: 100;
      padding: 1rem 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.3s ease;
    }
    nav.scrolled {
      background: rgba(26, 26, 26, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0,0,0,0.15);
      padding: 0.75rem 5%;
    }
    nav .logo {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--color-gold);
      letter-spacing: 0.05em;
      text-decoration: none;
    }
    nav.scrolled .logo { color: var(--color-gold-light); }
    nav .logo .sub { font-weight: 400; font-size: 0.8rem; opacity: 0.6; }
    nav ul { display: flex; list-style: none; gap: 2rem; }
    nav a.nav-link {
      color: rgba(255,255,255,0.85);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      transition: color 0.2s;
      position: relative;
    }
    nav a.nav-link:hover, nav a.nav-link.active { color: var(--color-gold-light); }
    nav a.nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px; left: 0;
      width: 0; height: 2px;
      background: var(--color-gold-light);
      transition: width 0.3s;
    }
    nav a.nav-link:hover::after, nav a.nav-link.active::after { width: 100%; }
    .mobile-menu-btn { display: none; background: none; border: none; color: var(--color-gold); font-size: 1.5rem; cursor: pointer; }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      padding: 6rem 5% 4rem;
    }
    .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(2.8rem, 9vw, 5.5rem);
      font-weight: 700;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 0.75rem;
      letter-spacing: 0.05em;
    }
    .hero h1 .accent { color: var(--color-gold-light); }
    .hero .tagline {
      font-size: clamp(1.15rem, 2.5vw, 1.6rem);
      color: rgba(255,255,255,0.8);
      margin-bottom: 2.5rem;
      font-weight: 400;
    }
    .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; }
    .hero-cta {
      display: inline-flex;
      gap: 1rem;
      flex-wrap: wrap;
      justify-content: center;
    }
    .hero-cta a {
      display: inline-block;
      padding: 0.8rem 2rem;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      transition: all 0.25s;
    }
    .hero-cta a.primary { background: var(--color-gold); color: #1a1a1a; }
    .hero-cta a.primary:hover { background: var(--color-gold-light); transform: translateY(-2px); }
    .hero-cta a.secondary { border: 1px solid rgba(255,255,255,0.4); color: #fff; }
    .hero-cta a.secondary:hover { border-color: var(--color-gold); color: var(--color-gold-light); }
    .scroll-hint {
      position: absolute;
      bottom: 2rem; left: 50%;
      transform: translateX(-50%);
      color: rgba(255,255,255,0.5);
      font-size: 0.85rem;
      animation: bounce 2s infinite;
      cursor: pointer;
      text-decoration: none;
    }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-5px); }
    }

    /* Sections */
    section { padding: 5rem 5%; max-width: 1200px; margin: 0 auto; }
    .section-title {
      max-width: 880px;
      margin: 0 auto 3rem;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 2.6rem 2.4rem 2.4rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .section-title::before {
      content: ''; position: absolute; top: 0; left: 0;
      width: 100%; height: 4px; background: var(--color-gold);
    }
    .section-title h2 {
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 0.9rem;
      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: 1.04rem;
      max-width: 680px;
      margin: 1.7rem auto 0;
      line-height: 1.95;
    }
    /* Journey (心路历程) flowchart */
    .journey-flow {
      background: var(--color-card);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      border: 1px solid var(--color-border);
      position: relative;
      overflow: hidden;
      padding: 2.6rem 2rem;
      display: flex;
      align-items: stretch;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0;
    }
    .journey-flow::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--color-gold); }
    .flow-node {
      flex: 1 1 168px;
      max-width: 210px;
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      border-radius: 10px;
      padding: 1.5rem 1.2rem;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .flow-node .step {
      width: 34px; height: 34px;
      border-radius: 50%;
      background: var(--color-gold);
      color: #1a1a1a;
      display: flex; align-items: center; justify-content: center;
      font-weight: 700; font-size: 1rem;
      margin-bottom: 0.8rem;
    }
    .flow-node h3 { font-size: 1.12rem; margin-bottom: 0.5rem; color: var(--color-dark); }
    .flow-node p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.7; }
    .flow-arrow {
      display: flex; align-items: center; justify-content: center;
      color: var(--color-gold);
      font-size: 1.5rem; font-weight: 700;
      flex: 0 0 34px;
    }
    .journey-foot { text-align: center; margin-top: 1.8rem; }
    .journey-cta {
      display: inline-block; font-size: 1.02rem; color: var(--color-gold); font-weight: 600;
      text-decoration: none; padding: 0.75rem 2rem; border: 1px solid var(--color-gold);
      border-radius: 30px; transition: all 0.25s ease;
    }
    .journey-cta:hover { background: var(--color-gold); color: #1a1a1a; }
    /* Unified gold-top-bar tiles: subjects, humanities, articles */
    .subjects-grid, .articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
    .tile-card {
      background: var(--color-card);
      border-radius: var(--radius);
      padding: 1.9rem 1.8rem;
      box-shadow: var(--shadow);
      border: 1px solid var(--color-border);
      transition: transform 0.3s, box-shadow 0.3s;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      min-height: 214px;
    }
    .tile-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .tile-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--color-gold); }
    .tile-card .tile-tag {
      display: inline-block; align-self: flex-start;
      background: rgba(201,162,39,0.10);
      color: var(--color-gold);
      font-size: 0.7rem; font-weight: 700;
      padding: 0.22rem 0.6rem; border-radius: 4px;
      letter-spacing: 0.05em; margin-bottom: 0.85rem;
    }
    .tile-card h3 { font-size: 1.25rem; margin-bottom: 0.4rem; color: var(--color-dark); line-height: 1.4; }
    .tile-card .tile-sub { color: var(--color-text-muted); font-size: 0.82rem; margin-bottom: 0.7rem; }
    .tile-card .tile-note { color: var(--color-text-muted); font-size: 0.92rem; line-height: 1.75; flex: 1; }
    .tile-card .tile-hint {
      display: flex; align-items: center; gap: 0.4rem;
      margin-top: 1.1rem; padding-top: 1rem;
      border-top: 1px solid var(--color-border);
      color: var(--color-gold); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.03em;
    }
    .tile-card.linked { text-decoration: none; cursor: pointer; color: inherit; }
    .tile-card.linked h3, .tile-card.linked .tile-note, .tile-card.linked .tile-sub { color: inherit; }
    .tile-card.coming { opacity: 0.92; }
    .tile-card.coming::after {
      content: '即将上线'; position: absolute; top: 14px; right: 14px;
      font-size: 0.7rem; color: var(--color-text-muted);
      background: rgba(0,0,0,0.05); padding: 0.2rem 0.55rem;
      border-radius: 10px; letter-spacing: 0.05em;
    }

    /* Articles */
    .articles-section { background: var(--color-bg); }
    .articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.75rem; }
    /* (article-card cover-card styles retired — homepage now uses .tile-card) */

    /* Footer */
    footer {
      background: var(--color-dark);
      color: rgba(255,255,255,0.7);
      text-align: center;
      padding: 3rem 5%;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    footer .blog-title { color: #fff; font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; }
    footer a { color: var(--color-gold); text-decoration: none; }

    /* 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) {
      .journey-flow { flex-direction: column; align-items: center; }
      .flow-node { max-width: 360px; width: 100%; }
      .flow-arrow { flex-basis: 30px; transform: rotate(90deg); }
    }
    @media (max-width: 768px) {
      nav ul { display: none; }
      .mobile-menu-btn { display: block; }
      .hero h1 { font-size: 2.6rem; }
      .hero-quote { padding: 1.25rem; font-size: 0.95rem; }
      section { padding: 3.5rem 5%; }
    }
    @media (max-width: 480px) {
      .hero h1 { font-size: 2.1rem; }
      .subjects-grid, .articles-grid { grid-template-columns: 1fr; }
      .hero-cta a { padding: 0.7rem 1.5rem; font-size: 0.88rem; }
    }