/* ── HERO ── */
    .hero {
      background: var(--ink);
      padding: 9rem 2rem 5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse 60% 50% at 50% 80%, rgba(196,149,106,0.1) 0%, transparent 65%),
        linear-gradient(160deg, #1c1a17 0%, #252018 60%, #1e1b14 100%);
    }
    .hero-lines {
      position: absolute; inset: 0; pointer-events: none;
    }
    .hero-lines svg { width: 100%; height: 100%; }

    .hero-inner {
      position: relative; z-index: 2;
      max-width: 620px;
      margin: 0 auto;
    }
    .hero-label {
      font-family: 'EB Garamond', serif;
      font-style: italic;
      font-size: 0.88rem;
      color: var(--accent3);
      letter-spacing: 0.25em;
      margin-bottom: 1.4rem;
      opacity: 0;
      animation: fadeUp 0.9s 0.2s ease forwards;
    }
    .hero-title {
      font-family: 'Noto Serif TC', serif;
      font-size: clamp(1.8rem, 5vw, 2.8rem);
      font-weight: 600;
      color: var(--paper);
      letter-spacing: 0.08em;
      line-height: 1.25;
      margin-bottom: 1.2rem;
      opacity: 0;
      animation: fadeUp 0.9s 0.4s ease forwards;
    }
    .hero-divider {
      width: 40px; height: 1px;
      background: linear-gradient(90deg, transparent, var(--accent3), transparent);
      margin: 0 auto 1.4rem;
      opacity: 0;
      animation: fadeIn 0.9s 0.6s ease forwards;
    }
    .hero-desc {
      font-size: 0.85rem;
      color: rgba(250,247,242,0.45);
      letter-spacing: 0.06em;
      line-height: 2;
      opacity: 0;
      animation: fadeUp 0.9s 0.75s ease forwards;
    }

    /* ── TOOLS GRID ── */
    .tools-section {
      padding: 5rem 2rem 7rem;
      max-width: 900px;
      margin: 0 auto;
    }

    .tools-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
      gap: 1.5px;
      background: rgba(0,0,0,0.07);
      border: 1px solid rgba(0,0,0,0.07);
    }

    .tool-card {
      background: var(--paper);
      padding: 2.4rem 2.2rem;
      position: relative;
      overflow: hidden;
      transition: background 0.3s, transform 0.3s;
      text-decoration: none;
      display: block;
      color: inherit;
    }
    .tool-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0;
      width: 0; height: 3px;
      background: linear-gradient(90deg, var(--accent3), var(--accent2));
      transition: width 0.4s ease;
    }
    .tool-card:hover {
      background: var(--paper-warm);
      transform: translateY(-2px);
    }
    .tool-card:hover::before {
      width: 100%;
    }

    .tool-category {
      font-family: 'EB Garamond', serif;
      font-style: italic;
      font-size: 0.72rem;
      letter-spacing: 0.22em;
      color: var(--accent2);
      margin-bottom: 0.6rem;
    }
    .tool-name {
      font-family: 'Noto Serif TC', serif;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      letter-spacing: 0.06em;
      margin-bottom: 0.8rem;
      line-height: 1.4;
    }
    .tool-desc {
      font-size: 0.78rem;
      color: var(--text-soft);
      line-height: 1.9;
      margin-bottom: 1.4rem;
    }
    .tool-arrow {
      font-size: 0.75rem;
      color: var(--accent3);
      letter-spacing: 0.18em;
      font-family: 'EB Garamond', serif;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      transition: gap 0.2s;
    }
    .tool-card:hover .tool-arrow {
      gap: 0.7rem;
    }

    .tool-tag {
      display: inline-block;
      font-size: 0.62rem;
      letter-spacing: 0.12em;
      padding: 0.2rem 0.6rem;
      background: var(--paper-mid);
      color: var(--text-soft);
      border-radius: 2px;
      margin-bottom: 1rem;
    }
    .tool-tag.highlight {
      background: rgba(196,149,106,0.15);
      color: var(--accent1);
    }

    /* ── BACK CTA ── */
    .back-cta {
      text-align: center;
      padding: 4rem 2rem 6rem;
      background: var(--ink);
    }
    .back-cta-label {
      font-family: 'EB Garamond', serif;
      font-style: italic;
      font-size: 0.82rem;
      letter-spacing: 0.25em;
      color: rgba(250,247,242,0.3);
      margin-bottom: 1.2rem;
    }
    .back-cta-text {
      font-family: 'Noto Serif TC', serif;
      font-size: 1rem;
      color: rgba(250,247,242,0.7);
      letter-spacing: 0.06em;
      margin-bottom: 1.8rem;
    }
    .btn-back {
      display: inline-block;
      padding: 0.85rem 2.2rem;
      background: transparent;
      border: 1px solid rgba(250,247,242,0.25);
      color: rgba(250,247,242,0.6);
      font-family: 'Noto Serif TC', serif;
      font-size: 0.82rem;
      letter-spacing: 0.18em;
      text-decoration: none;
      transition: border-color 0.3s, color 0.3s;
    }
    .btn-back:hover {
      border-color: var(--accent3);
      color: var(--accent3);
    }

    /* ── FOOTER ── */
    footer {
      background: var(--ink);
      color: rgba(250,247,242,0.55);
      padding: 2.5rem 2rem;
      text-align: center;
      border-top: 1px solid rgba(250,247,242,0.06);
      font-size: 0.78rem;
      line-height: 2;
      letter-spacing: 0.04em;
    }
    footer .inner { max-width: 600px; margin: 0 auto; }
    .footer-copy {
      font-size: 0.68rem;
      color: rgba(250,247,242,0.3);
      letter-spacing: 0.06em;
    }

    /* ── ANIMATIONS ── */

    /* ── RESPONSIVE ── */
    @media (max-width: 680px) {
      .tools-grid { grid-template-columns: 1fr; }
      .nav-title { display: none; }
    }