:root {
            --bg: #12100a;
            --surface: #232012;
            --accent: #f5c542;
            --accent-hover: #dcae33;
            --accent2: #84cc16;
            --text: #fdfaf0;
            --muted: #b8b28f;
            --border: #3a3520;

            --font-display: 'Teko', sans-serif;
            --font-body: 'Nunito', sans-serif;

            --container-padding: 1.5rem;
            --transition: all 0.3s ease;
        }

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

        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: var(--font-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent-hover);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 var(--container-padding);
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
            font-weight: 500;
            line-height: 1.1;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        h1 { font-size: 2.5rem; margin-bottom: 1rem; color: var(--accent); }
        h2 { font-size: 2rem; margin-bottom: 1.25rem; color: var(--text); border-bottom: 2px solid var(--border); padding-bottom: 0.5rem; }
        h3 { font-size: 1.75rem; margin-bottom: 1rem; }
        p { margin-bottom: 1.25rem; color: var(--muted); font-size: 1rem; }

        .text-highlight { color: var(--text); }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            font-family: var(--font-display);
            font-size: 1.25rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            border: 2px solid transparent;
            font-weight: 600;
        }

        .btn-primary {
            background-color: var(--accent);
            color: var(--bg);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            color: var(--bg);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-secondary:hover {
            background-color: rgba(245, 197, 66, 0.1);
            transform: translateY(-2px);
        }

        /* HEADER (Matches Homepage constraints) */
        header {
            background-color: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-desktop { display: none; }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-desktop a {
            color: var(--text);
            font-weight: 600;
            font-size: 1.1rem;
            font-family: var(--font-display);
            text-transform: uppercase;
        }
        .nav-desktop a:hover { color: var(--accent); }

        .header-ctas { display: none; gap: 1rem; }
        .header-ctas .btn { padding: 0.4rem 1rem; font-size: 1.1rem; min-height: 38px; }

        .mobile-menu-btn {
            background: none;
            border: none;
            color: var(--accent);
            font-size: 1.75rem;
            cursor: pointer;
            min-width: 44px;
            min-height: 44px;
        }

        .mobile-nav {
            display: none;
            background-color: var(--surface);
            border-top: 1px solid var(--border);
            padding: 1rem var(--container-padding);
        }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { list-style: none; margin-bottom: 1.5rem; }
        .mobile-nav li { border-bottom: 1px solid var(--border); }
        .mobile-nav a {
            display: block;
            padding: 1rem 0;
            color: var(--text);
            font-family: var(--font-display);
            font-size: 1.25rem;
            text-transform: uppercase;
        }
        .mobile-nav .header-ctas { display: flex; flex-direction: column; width: 100%; }
        .mobile-nav .btn { width: 100%; margin-bottom: 0.5rem; }

        /* PAGE SPECIFIC: ABOUT US */

        /* Hero Banner */
        .hero-banner {
            background-color: var(--surface);
            padding: 3rem 0;
            text-align: center;
            border-bottom: 4px double var(--border);
            position: relative;
            overflow: hidden;
        }

        /* Coin stack / Ledger motif background */
        .hero-banner::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: repeating-linear-gradient(0deg, transparent, transparent 4px, rgba(245, 197, 66, 0.03) 4px, rgba(245, 197, 66, 0.03) 8px);
            z-index: 1;
            pointer-events: none;
        }

        .hero-banner .container { position: relative; z-index: 2; }

        .breadcrumb {
            font-size: 0.875rem;
            color: var(--muted);
            margin-bottom: 1.5rem;
            display: inline-block;
            background: rgba(18, 16, 10, 0.5);
            padding: 0.25rem 1rem;
            border-radius: 20px;
            border: 1px solid var(--border);
        }

        .hero-banner h1 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .meta-chips {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .chip {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text);
            background-color: var(--bg);
            border: 1px solid var(--accent);
            padding: 0.4rem 1rem;
            border-radius: 4px;
            display: inline-flex;
            align-items: center;
            box-shadow: 2px 2px 0 rgba(245, 197, 66, 0.2);
        }

        /* Main Content Layout */
        .page-wrapper {
            padding: 4rem 0;
            display: flex;
            flex-direction: column;
            gap: 4rem;
        }

        /* Intro Block */
        .intro-block {
            background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
            border-left: 6px solid var(--accent);
            padding: 2rem;
            border-radius: 0 8px 8px 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            position: relative;
        }

        .intro-block::after {
            content: '"';
            position: absolute;
            top: -10px;
            right: 20px;
            font-family: var(--font-display);
            font-size: 6rem;
            color: rgba(245, 197, 66, 0.1);
            line-height: 1;
        }

        .intro-block p {
            font-size: 1.15rem;
            color: var(--text);
            margin-bottom: 0;
            line-height: 1.8;
        }

        /* Article Sections */
        .article-grid {
            display: grid;
            gap: 3rem;
            grid-template-columns: 1fr;
        }

        .content-section p a {
            color: var(--accent);
            font-weight: 700;
            border-bottom: 1px dashed var(--accent);
        }
        .content-section p a:hover {
            color: var(--accent-hover);
            border-bottom-style: solid;
        }

        /* Custom List for Section 4 */
        .feature-list {
            list-style: none;
            margin-top: 1.5rem;
            display: grid;
            gap: 1rem;
        }

        .feature-list li {
            background-color: var(--surface);
            padding: 1rem 1rem 1rem 3rem;
            border-radius: 6px;
            position: relative;
            color: var(--text);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .feature-list li:hover {
            border-color: var(--accent2);
            transform: translateX(5px);
        }

        .feature-list li::before {
            content: '✓';
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent2);
            font-weight: bold;
            font-size: 1.2rem;
        }

        /* FAQ Section */
        .faq-section {
            background-color: var(--surface);
            padding: 3rem 2rem;
            border-radius: 8px;
            border: 1px solid var(--border);
        }

        .faq-section h2 {
            text-align: center;
            border-bottom: none;
            margin-bottom: 2rem;
        }

        details {
            margin-bottom: 1rem;
            border: 1px solid var(--border);
            border-radius: 4px;
            background-color: var(--bg);
            overflow: hidden;
        }

        summary {
            padding: 1.25rem;
            font-family: var(--font-display);
            font-size: 1.3rem;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            letter-spacing: 0.5px;
        }

        summary::-webkit-details-marker { display: none; }

        summary::after {
            content: '+';
            color: var(--accent);
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        details[open] summary::after {
            transform: rotate(45deg);
        }

        details p {
            padding: 0 1.25rem 1.25rem;
            margin: 0;
            border-top: 1px dashed var(--border);
            padding-top: 1rem;
        }

        /* Related Pages */
        .related-nav {
            text-align: center;
        }

        .related-nav h2 { border-bottom: none; }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            margin-top: 1.5rem;
        }

        .tags-container a {
            background-color: var(--surface);
            color: var(--muted);
            padding: 0.75rem 1.5rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 1px solid var(--border);
        }

        .tags-container a:hover {
            background-color: var(--accent);
            color: var(--bg);
            border-color: var(--accent);
        }

        /* Final CTA */
        .final-cta {
            background: linear-gradient(45deg, var(--surface) 0%, #312c17 100%);
            border: 2px solid var(--accent);
            border-radius: 8px;
            padding: 4rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        /* Ledger motif */
        .final-cta::before {
            content: '';
            position: absolute;
            top: 10px; left: 10px; right: 10px; bottom: 10px;
            border: 1px dashed rgba(245, 197, 66, 0.3);
            pointer-events: none;
        }

        .final-cta h2 {
            font-size: 2.5rem;
            color: var(--accent);
            border: none;
            margin-bottom: 1rem;
        }

        .final-cta p {
            font-size: 1.2rem;
            color: var(--text);
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-group {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* FOOTER (Matches Homepage constraints) */
        footer {
            background-color: #0a0905;
            border-top: 2px solid var(--border);
            padding: 4rem 0 0 0;
            margin-top: 4rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }

        .footer-brand .logo { margin-bottom: 1rem; }
        .footer-tagline { color: var(--muted); font-size: 0.95rem; }

        .footer-links h4 {
            color: var(--text);
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-links h4::after {
            content: '';
            position: absolute;
            left: 0; bottom: 0;
            width: 40px; height: 2px;
            background-color: var(--accent);
        }

        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.75rem; }
        .footer-links a { color: var(--muted); font-size: 0.95rem; }
        .footer-links a:hover { color: var(--accent); padding-left: 5px; }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 1.5rem 0;
            text-align: center;
            color: var(--muted);
            font-size: 0.875rem;
        }

        /* Breakpoints */
        @media (min-width: 768px) {
            h1 { font-size: 3.5rem; }
            .article-grid { grid-template-columns: 1fr 1fr; }
            .content-section:nth-child(1), .content-section:nth-child(4) { grid-column: 1 / -1; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .hero-banner { padding: 4rem 0; }
        }

        @media (min-width: 1024px) {
            .nav-desktop { display: block; }
            .header-ctas { display: flex; }
            .mobile-menu-btn { display: none; }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
            .article-grid { gap: 4rem; }
        }

        @media (min-width: 1280px) {
            h1 { font-size: 4rem; }
        }


/* pipeline image & layout guards */
html, body { overflow-x: clip; }
img { max-width: 100%; height: auto; }
img.site-logo { height: 40px; width: auto; max-width: 240px; object-fit: contain; flex: none; }
header .logo a { display: inline-flex; align-items: center; flex: none; text-decoration: none; }
img.hero-visual { width: 100%; max-width: 560px; height: auto; object-fit: cover; border-radius: 16px; display: block; margin-inline: auto; }
img[class^="strip-"], img[class*=" strip-"] { width: 100%; height: auto; display: block; border-radius: 12px; object-fit: cover; }
/* 合规声明块（zb-disclaimer，全站 footer） */
.zb-disclaimer { margin-top: 18px !important; padding: 14px 0 0 0 !important; border-top: 1px solid rgba(128,128,128,.25) !important; font-size: .72rem !important; line-height: 1.7 !important; opacity: .85 !important; display: block !important; text-align: left !important; width: 100% !important; clear: both !important; }
.zb-disclaimer .zb-18 { display: inline-block !important; padding: 2px 10px !important; border: 1.5px solid currentColor !important; border-radius: 6px !important; font-weight: 800 !important; letter-spacing: 1px !important; margin: 0 0 10px 0 !important; font-size: .78rem !important; }
.zb-disclaimer p { display: block !important; margin: 5px 0 !important; padding: 0 !important; color: inherit !important; font-size: .72rem !important; line-height: 1.7 !important; }
.zb-disclaimer p:last-child { margin-bottom: 0 !important; }