*,
      *::before,
      *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }

      :root {
        --bg: #0b0f1c;
        --fg: #f0f4f8;
        --card: #0f1525;
        --border: #1c2636;
        --primary: #f5a620;
        --primary-fg: #0b0f1c;
        --muted: #8395a4;
        --amber: #fbbf24;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        font-family: "Noto Sans TC", sans-serif;
        background-color: var(--bg);
        color: var(--fg);
        line-height: 1.6;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
        background-image:
          radial-gradient(
            circle at top right,
            rgba(67, 150, 255, 0.05),
            transparent 40%
          ),
          radial-gradient(
            circle at bottom left,
            rgba(245, 158, 11, 0.03),
            transparent 40%
          );
      }

      a {
        color: inherit;
        text-decoration: none;
      }
      img {
        max-width: 100%;
        display: block;
      }
      hr {
        border: none;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
      }

      /* ── Typography ── */
      h1 {
        font-size: clamp(2rem, 6vw, 3.5rem);
        font-weight: 700;
        line-height: 1.1;
        letter-spacing: -0.02em;
      }
      h2 {
        font-size: clamp(1.4rem, 3.5vw, 1.875rem);
        font-weight: 700;
        line-height: 1.25;
      }
      h3 {
        font-size: 1.1rem;
        font-weight: 700;
        line-height: 1.4;
      }

      /* ── Layout helpers ── */
      .container {
        max-width: 72rem;
        margin: 0 auto;
        padding: 0 1.25rem;
      }
      .container-sm {
        max-width: 48rem;
        margin: 0 auto;
        padding: 0 1.25rem;
      }
      .container-md {
        max-width: 60rem;
        margin: 0 auto;
        padding: 0 1.25rem;
      }

      /* ── Navbar ── */
      #navbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 50;
        background: rgba(11, 15, 28, 0.85);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
      }
      .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 5rem;
        max-width: 90rem;
        margin: 0 auto;
        padding: 0 1.25rem;
      }
      .nav-logo {
        display: flex;
        align-items: center;
        gap: 0.75rem;
      }
      .nav-logo-icon {
        width: 2.5rem;
        height: 2.5rem;
        border-radius: 0.75rem;
        background: linear-gradient(135deg, var(--primary), #d97706);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 12px rgba(245, 166, 32, 0.3);
        flex-shrink: 0;
      }
      .nav-logo-text {
        font-family: "Outfit", sans-serif;
        font-size: 1.125rem;
        font-weight: 700;
      }
      .nav-logo-text span {
        color: var(--primary);
      }

      /* ── Buttons ── */
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.875rem 2rem;
        border-radius: 0.75rem;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s;
        border: none;
        text-decoration: none;
        white-space: nowrap;
      }
      .btn-primary {
        background: var(--primary);
        color: var(--primary-fg);
        box-shadow: 0 4px 16px rgba(245, 166, 32, 0.25);
      }
      .btn-primary:hover {
        background: #e09510;
        transform: translateY(-1px);
      }
      .btn-outline {
        background: rgba(255, 255, 255, 0.05);
        color: var(--fg);
        border: 1px solid rgba(255, 255, 255, 0.15);
        font-weight: 500;
      }
      .btn-outline:hover {
        background: rgba(255, 255, 255, 0.1);
      }
      .btn-ghost {
        background: transparent;
        color: var(--muted);
        padding: 0.875rem 1.5rem;
        font-weight: 500;
      }
      .btn-ghost:hover {
        color: var(--fg);
      }
      .btn-sm {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
        border-radius: 0.5rem;
      }

      /* ── Sections ── */
      section {
        padding: 6rem 0;
      }
      section.dark-card {
        background: rgba(15, 21, 37, 0.5);
      }

      /* ── Hero ── */
      #hero {
        padding-top: 7rem;
        padding-bottom: 5rem;
        position: relative;
        overflow: hidden;
      }
      #hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          to bottom,
          rgba(245, 166, 32, 0.05),
          transparent 60%
        );
        pointer-events: none;
      }
      .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.375rem 0.875rem;
        border-radius: 9999px;
        background: rgba(245, 166, 32, 0.1);
        border: 1px solid rgba(245, 166, 32, 0.2);
        color: var(--primary);
        font-size: 0.875rem;
        font-weight: 600;
        margin-bottom: 2rem;
      }
      .hero-sub {
        font-size: clamp(1.1rem, 2.5vw, 1.5rem);
        color: var(--muted);
        font-weight: 400;
        margin-bottom: 2rem;
        line-height: 1.6;
      }
      .hero-body {
        font-size: 1.0625rem;
        color: var(--muted);
        margin-bottom: 1rem;
        max-width: 44rem;
        line-height: 1.75;
      }
      .hero-body strong {
        color: var(--fg);
      }
      .hero-note {
        font-size: 0.875rem;
        color: rgba(131, 149, 164, 0.7);
        margin-top: 1.25rem;
        margin-bottom: 2.5rem;
      }
      .btn-row {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
      }
      .hahow-note {
        margin-top: 1.5rem;
        font-size: 0.875rem;
        color: rgba(131, 149, 164, 0.6);
      }
      .hahow-note a {
        text-decoration: underline;
        text-underline-offset: 2px;
      }
      .hahow-note a:hover {
        color: var(--primary);
      }

      /* ── Hero 定義區 ── */
      .hero-defs {
        margin-top: 3.5rem;
        padding-top: 3rem;
        border-top: 1px solid var(--border);
      }
      .hero-defs-label {
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: rgba(131, 149, 164, 0.6);
        margin-bottom: 1.5rem;
      }
      .hero-defs-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
      }
      @media (max-width: 640px) {
        .hero-defs-grid {
          grid-template-columns: 1fr;
        }
      }
      .hero-def-card {
        background: rgba(15, 21, 37, 0.6);
        border: 1px solid var(--border);
        border-radius: 0.875rem;
        padding: 1.25rem 1.5rem;
      }
      .hero-def-term {
        display: inline-block;
        font-family: "Outfit", sans-serif;
        font-size: 0.8rem;
        font-weight: 800;
        letter-spacing: 0.08em;
        color: var(--primary);
        margin-bottom: 0.625rem;
        background: rgba(245, 166, 32, 0.08);
        border: 1px solid rgba(245, 166, 32, 0.15);
        padding: 0.2rem 0.6rem;
        border-radius: 0.25rem;
      }
      .hero-def-card h3 {
        font-size: 0.9375rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
      }
      .hero-def-card p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.65;
      }
      .hero-defs-footer {
        margin-top: 1.25rem;
        padding: 1rem 1.25rem;
        background: rgba(245, 166, 32, 0.04);
        border: 1px solid rgba(245, 166, 32, 0.12);
        border-radius: 0.75rem;
        font-size: 0.9rem;
        color: rgba(240, 244, 248, 0.85);
        line-height: 1.7;
      }
      .hero-defs-footer strong {
        color: var(--primary);
      }

      /* ── Pain points ── */
      .symptom-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 3rem;
      }
      .symptom-list li {
        display: flex;
        align-items: flex-start;
        gap: 0.75rem;
        color: rgba(240, 244, 248, 0.9);
      }
      .symptom-icon {
        width: 1.25rem;
        height: 1.25rem;
        color: var(--amber);
        flex-shrink: 0;
        margin-top: 0.1rem;
      }
      .blockquote {
        border-left: 2px solid rgba(245, 166, 32, 0.4);
        padding-left: 1.5rem;
      }
      .blockquote p {
        color: rgba(240, 244, 248, 0.8);
        margin-bottom: 0.5rem;
      }

      /* ── Compare cards ── */
      .compare-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1.25rem;
        margin-top: 2.5rem;
        margin-bottom: 2rem;
      }
      @media (max-width: 768px) {
        .compare-grid {
          grid-template-columns: 1fr;
        }
      }
      .compare-card {
        background: rgba(15, 21, 37, 0.6);
        border: 1px solid var(--border);
        border-radius: 1rem;
        padding: 1.75rem 1.5rem;
      }
      .compare-card-tag {
        display: inline-block;
        font-family: "Outfit", sans-serif;
        font-size: 0.875rem;
        font-weight: 800;
        letter-spacing: 0.06em;
        color: var(--primary);
        margin-bottom: 1rem;
        padding: 0.25rem 0.75rem;
        border-radius: 0.375rem;
        background: rgba(245, 166, 32, 0.1);
        border: 1px solid rgba(245, 166, 32, 0.2);
      }
      .compare-card h3 {
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 0.75rem;
      }
      .compare-card p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.7;
      }
      .compare-summary {
        background: rgba(245, 166, 32, 0.06);
        border: 1px solid rgba(245, 166, 32, 0.15);
        border-radius: 1rem;
        padding: 1.5rem;
        margin-top: 1rem;
        text-align: center;
        font-size: 0.9375rem;
        color: rgba(240, 244, 248, 0.9);
        line-height: 1.75;
      }
      .compare-summary strong {
        color: var(--primary);
      }

      /* ── Rebuild cards (new format) ── */
      .rebuild-cards-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1.25rem;
        margin-top: 3rem;
      }
      @media (max-width: 768px) {
        .rebuild-cards-grid {
          grid-template-columns: 1fr;
        }
      }
      .rebuild-card {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 1rem;
        padding: 2rem 1.75rem;
      }
      .rebuild-card-num {
        font-family: "Outfit", sans-serif;
        font-size: 3rem;
        font-weight: 800;
        color: rgba(245, 166, 32, 0.12);
        line-height: 1;
        margin-bottom: 1rem;
        user-select: none;
      }
      .rebuild-tag {
        display: inline-block;
        padding: 0.25rem 0.75rem;
        border-radius: 9999px;
        background: rgba(245, 166, 32, 0.1);
        border: 1px solid rgba(245, 166, 32, 0.2);
        color: var(--primary);
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.05em;
        margin-bottom: 1rem;
      }
      .rebuild-card h3 {
        font-size: 1.0625rem;
        margin-bottom: 0.75rem;
        line-height: 1.45;
      }
      .rebuild-card p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.75;
      }

      /* ── Audience ── */
      .audience-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 3rem;
      }
      @media (min-width: 768px) {
        .audience-grid {
          grid-template-columns: repeat(3, 1fr);
        }
      }
      .audience-card {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 1rem;
        padding: 1.5rem;
      }
      .check-icon {
        width: 1.25rem;
        height: 1.25rem;
        color: var(--primary);
        margin-bottom: 1rem;
      }
      .audience-card h3 {
        margin-bottom: 0.75rem;
      }
      .audience-card p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.65;
      }
      .not-for {
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 1rem;
        padding: 1.5rem;
        background: rgba(255, 255, 255, 0.01);
      }
      .not-for-header {
        display: flex;
        align-items: flex-start;
        gap: 0.75rem;
        margin-bottom: 0.75rem;
      }
      .not-for h3 {
        color: var(--muted);
        font-weight: 700;
      }
      .not-for p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.65;
        margin-left: 2rem;
        margin-bottom: 0.5rem;
      }

      /* ── Chapters (new expanded format) ── */
      .chapter-list-new {
        display: flex;
        flex-direction: column;
        gap: 1rem;
      }
      .chapter-card {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 1rem;
        overflow: hidden;
        transition: border-color 0.2s;
      }
      .chapter-card:hover {
        border-color: rgba(245, 166, 32, 0.35);
      }
      .chapter-card-head {
        display: flex;
        align-items: center;
        gap: 1.25rem;
        padding: 1.25rem 1.5rem;
        cursor: pointer;
        list-style: none;
      }
      .chapter-card-head::-webkit-details-marker {
        display: none;
      }
      .chapter-num {
        flex-shrink: 0;
        width: 2.5rem;
        height: 2.5rem;
        border-radius: 9999px;
        background: rgba(245, 166, 32, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-weight: 700;
        font-size: 0.875rem;
      }
      .chapter-card-main {
        flex: 1;
        min-width: 0;
      }
      .chapter-label-row {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 0.25rem;
      }
      .chapter-label {
        font-size: 0.75rem;
        color: var(--muted);
      }
      .chapter-badge {
        display: inline-block;
        padding: 0.125rem 0.5rem;
        border-radius: 0.25rem;
        font-size: 0.75rem;
        font-weight: 700;
        background: rgba(245, 166, 32, 0.1);
        color: var(--primary);
        border: 1px solid rgba(245, 166, 32, 0.2);
      }
      .chapter-title {
        font-weight: 700;
        font-size: 1rem;
      }
      details[open] .chapter-card {
        border-color: rgba(245, 166, 32, 0.4);
        background: var(--card);
      }
      details[open] .chapter-card-head {
        border-bottom: 1px solid var(--border);
      }
      .chapter-card-body {
        padding: 1.25rem 1.5rem 1.5rem 4.75rem;
      }
      @media (max-width: 640px) {
        .chapter-card-body {
          padding: 1.25rem 1.25rem 1.5rem;
        }
      }
      .chapter-card-row {
        margin-bottom: 0.875rem;
      }
      .chapter-card-row:last-child {
        margin-bottom: 0;
      }
      .chapter-row-label {
        font-size: 0.7rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--primary);
        margin-bottom: 0.375rem;
      }
      .chapter-row-text {
        font-size: 0.9rem;
        color: rgba(240, 244, 248, 0.85);
        line-height: 1.7;
      }
      .chapter-expand-icon {
        flex-shrink: 0;
        width: 1.25rem;
        height: 1.25rem;
        color: var(--muted);
        transition: transform 0.2s;
      }
      details[open] .chapter-expand-icon {
        transform: rotate(90deg);
      }
      /* first chapter is a direct link */
      .chapter-card-link {
        display: flex;
        align-items: center;
        gap: 1.25rem;
        padding: 1.25rem 1.5rem;
        text-decoration: none;
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 1rem;
        transition: all 0.2s;
      }
      .chapter-card-link:hover {
        background: var(--card);
        border-color: rgba(245, 166, 32, 0.4);
      }
      .chapter-card-link:hover .chapter-title {
        color: var(--primary);
      }

      /* ── Instructor ── */
      .instructor-card {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 3rem;
        align-items: start;
        max-width: 56rem;
        margin: 0 auto;
      }
      @media (max-width: 640px) {
        .instructor-card {
          grid-template-columns: 1fr;
          gap: 2rem;
          text-align: center;
        }
        .instructor-avatar {
          margin: 0 auto;
        }
      }
      .instructor-avatar {
        width: 9rem;
        height: 9rem;
        border-radius: 9999px;
        overflow: hidden;
        border: 3px solid rgba(245, 166, 32, 0.3);
        flex-shrink: 0;
        box-shadow: 0 0 0 6px rgba(245, 166, 32, 0.07);
      }
      .instructor-avatar img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
      }
      .instructor-name {
        font-size: 1.75rem;
        font-weight: 700;
        margin-bottom: 0.375rem;
      }
      .instructor-title {
        color: var(--muted);
        margin-bottom: 1.75rem;
        font-size: 0.9375rem;
      }
      .instructor-stats {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 1.75rem;
      }
      .instructor-stats li {
        display: flex;
        align-items: center;
        gap: 0.625rem;
        font-size: 0.9375rem;
      }
      @media (max-width: 640px) {
        .instructor-stats li {
          justify-content: center;
        }
      }
      .instructor-stats .star {
        color: var(--primary);
        font-size: 1rem;
      }
      .instructor-quote {
        border-left: 2px solid rgba(245, 166, 32, 0.4);
        padding: 1rem 1.25rem;
        background: rgba(245, 166, 32, 0.04);
        border-radius: 0 0.75rem 0.75rem 0;
        margin-bottom: 1.75rem;
        font-style: italic;
        color: rgba(240, 244, 248, 0.85);
        font-size: 0.9375rem;
        line-height: 1.7;
      }
      @media (max-width: 640px) {
        .instructor-quote {
          border-left: none;
          border-top: 2px solid rgba(245, 166, 32, 0.4);
          border-radius: 0.75rem;
          text-align: left;
        }
      }
      .instructor-body {
        font-size: 0.9rem;
        color: var(--muted);
        line-height: 1.8;
        margin-bottom: 1.5rem;
      }
      .instructor-body strong {
        color: rgba(240, 244, 248, 0.85);
      }

      /* ── 延伸閱讀 ── */
      .articles-section {
        margin-top: 5rem;
        padding-top: 4rem;
        border-top: 1px solid var(--border);
      }
      .section-label {
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--primary);
        margin-bottom: 1.5rem;
      }
      .articles-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
      }
      @media (max-width: 640px) {
        .articles-grid {
          grid-template-columns: 1fr;
        }
      }
      .article-card {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 0.875rem;
        padding: 1.25rem 1.5rem;
        transition: border-color 0.2s;
        text-decoration: none;
        display: block;
      }
      .article-card:hover {
        border-color: rgba(245, 166, 32, 0.35);
      }
      .article-card-date {
        font-size: 0.75rem;
        color: rgba(131, 149, 164, 0.6);
        margin-bottom: 0.5rem;
      }
      .article-card-title {
        font-size: 0.9375rem;
        font-weight: 700;
        color: var(--fg);
        margin-bottom: 0.5rem;
        line-height: 1.5;
      }
      .article-card:hover .article-card-title {
        color: var(--primary);
      }
      .article-card-excerpt {
        font-size: 0.8125rem;
        color: var(--muted);
        line-height: 1.65;
      }

      /* ── Chapter tags & citation ── */
      .chapter-desc {
        font-size: 0.875rem;
        color: var(--muted);
        margin-top: 0.375rem;
        line-height: 1.6;
      }
      .chapter-citation {
        margin-top: 1.25rem;
        padding: 1rem 1.25rem;
        background: rgba(11, 15, 28, 0.6);
        border: 1px solid rgba(255, 255, 255, 0.07);
        border-radius: 0.75rem;
      }
      .chapter-citation-source {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        color: rgba(131, 149, 164, 0.7);
        margin-bottom: 0.625rem;
      }
      .chapter-citation-dot {
        width: 0.375rem;
        height: 0.375rem;
        border-radius: 9999px;
        background: var(--primary);
        flex-shrink: 0;
      }
      .chapter-citation-quote {
        font-size: 0.8125rem;
        color: rgba(240, 244, 248, 0.55);
        line-height: 1.7;
        font-style: italic;
      }
      .chapter-citation-link {
        display: inline-flex;
        align-items: center;
        gap: 0.3rem;
        font-size: 0.75rem;
        color: rgba(131, 149, 164, 0.5);
        margin-top: 0.625rem;
        text-decoration: underline;
        text-underline-offset: 2px;
        transition: color 0.15s;
      }
      .chapter-citation-link:hover {
        color: var(--primary);
      }
      .chapter-expand-btn {
        display: flex;
        align-items: center;
        gap: 0.3rem;
        flex-shrink: 0;
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--primary);
        background: rgba(245, 166, 32, 0.1);
        border: 1px solid rgba(245, 166, 32, 0.2);
        border-radius: 0.375rem;
        padding: 0.3rem 0.75rem;
        white-space: nowrap;
        transition: background 0.15s;
      }
      details[open] .chapter-expand-btn {
        background: rgba(245, 166, 32, 0.18);
      }
      .chapter-expand-btn svg {
        transition: transform 0.2s;
      }
      details[open] .chapter-expand-btn svg {
        transform: rotate(90deg);
      }

      /* ── FAQ ── */
      #faq {
        padding: 6rem 0;
      }
      .faq-list {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-top: 2.5rem;
      }
      .faq-item {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid var(--border);
        border-radius: 1rem;
        overflow: hidden;
      }
      .faq-item details {
      }
      .faq-q {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 1rem;
        padding: 1.25rem 1.5rem;
        cursor: pointer;
        list-style: none;
        font-weight: 700;
        font-size: 0.9375rem;
        color: var(--fg);
      }
      .faq-q::-webkit-details-marker {
        display: none;
      }
      .faq-icon {
        flex-shrink: 0;
        width: 1.25rem;
        height: 1.25rem;
        color: var(--primary);
        margin-top: 0.1rem;
        transition: transform 0.2s;
      }
      details[open] .faq-icon {
        transform: rotate(45deg);
      }
      details[open] .faq-item {
        border-color: rgba(245, 166, 32, 0.3);
        background: var(--card);
      }
      .faq-a {
        padding: 0 1.5rem 1.5rem;
        font-size: 0.9rem;
        color: var(--muted);
        line-height: 1.8;
        border-top: 1px solid var(--border);
        padding-top: 1rem;
      }

      /* ── Diff box ── */
      .diff-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 2.5rem;
      }
      .diff-list li {
        display: flex;
        align-items: flex-start;
        gap: 0.75rem;
        color: rgba(240, 244, 248, 0.9);
      }
      .diff-icon {
        width: 1rem;
        height: 1rem;
        color: var(--primary);
        flex-shrink: 0;
        margin-top: 0.25rem;
      }
      .info-box {
        background: rgba(15, 21, 37, 0.5);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 1rem;
        padding: 1.5rem;
        margin-bottom: 2.5rem;
      }
      .info-box h3 {
        margin-bottom: 1rem;
      }
      .info-box p {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.75;
        margin-bottom: 0.75rem;
      }
      .info-box p:last-child {
        margin-bottom: 0;
      }

      /* ── Final CTA gradient ── */
      #final-cta {
        background: linear-gradient(
          to top,
          rgba(245, 166, 32, 0.08),
          var(--bg)
        );
        text-align: center;
      }
      #final-cta h2 {
        margin-bottom: 1.5rem;
      }
      #final-cta .sub {
        color: var(--muted);
        margin-bottom: 1rem;
      }
      #final-cta .body {
        color: rgba(240, 244, 248, 0.9);
        margin-bottom: 3rem;
        max-width: 36rem;
        margin-left: auto;
        margin-right: auto;
      }
      #final-cta .btn-row {
        justify-content: center;
      }

      /* ── Footer ── */
      footer {
        background: var(--bg);
        border-top: 1px solid var(--border);
        padding: 3rem 0;
        margin-top: 5rem;
        text-align: center;
        color: var(--muted);
      }
      .footer-logo {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        margin-bottom: 1rem;
        opacity: 0.5;
      }
      .footer-logo span {
        font-family: "Outfit", sans-serif;
        font-size: 1.125rem;
        font-weight: 700;
      }
      .footer-nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: .5rem 2rem;
        margin-bottom: 2rem;
        font-size: .8375rem;
      }
      .footer-nav a {
        color: var(--muted);
        text-decoration: none;
        transition: color .15s;
      }
      .footer-nav a:hover { color: var(--primary); }
      .footer-nav-sep {
        color: var(--border);
        user-select: none;
      }

      /* ── Responsive ── */
      @media (max-width: 640px) {
        .btn-row {
          flex-direction: column;
        }
        .btn {
          width: 100%;
        }
        section {
          padding: 4rem 0;
        }
        #hero {
          padding-top: 6rem;
          padding-bottom: 3.5rem;
        }
      }