:root {
            --bg-color: #12100a;
            --surface-color: #232012;
            --surface-hover: #2d2918;
            --accent-gold: #f5c542;
            --accent-green: #84cc16;
            --text-main: #fdfaf0;
            --text-muted: #b8b28f;
            --border-color: #3a351f;

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

            --container-width: 1200px;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
        }

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

        a:hover {
            color: #ffda73;
        }

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

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* --- BUTTONS --- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            font-family: var(--font-display);
            font-size: 1.125rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            text-align: center;
        }

        .btn-primary {
            background-color: var(--accent-gold);
            color: #000;
            border: 2px solid var(--accent-gold);
            font-weight: 600;
        }

        .btn-primary:hover {
            background-color: transparent;
            color: var(--accent-gold);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--accent-gold);
            border: 2px solid var(--border-color);
        }

        .btn-secondary:hover {
            border-color: var(--accent-gold);
            background-color: rgba(245, 197, 66, 0.1);
        }

        /* --- HEADER (A1) --- */
        header {
            background-color: var(--surface-color);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
        }

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

        .logo {
            font-size: 2rem;
            color: var(--accent-gold);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 24px;
        }

        .nav-desktop a {
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.95rem;
        }

        .nav-desktop a:hover {
            color: var(--accent-gold);
        }

        .header-ctas {
            display: flex;
            gap: 12px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--accent-gold);
            font-size: 1.5rem;
            cursor: pointer;
            min-width: 44px;
            min-height: 44px;
        }

        .mobile-nav {
            display: none;
            background-color: var(--surface-color);
            border-top: 1px solid var(--border-color);
            padding: 20px;
        }

        .mobile-nav.active {
            display: block;
        }

        .mobile-nav ul {
            list-style: none;
            margin-bottom: 20px;
        }

        .mobile-nav li {
            margin-bottom: 15px;
        }

        .mobile-nav a {
            color: var(--text-main);
            font-size: 1.1rem;
            font-weight: 600;
            display: block;
            padding: 5px 0;
        }

        /* --- HERO BANNER --- */
        .hero-banner {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);
            border-bottom: 1px dashed var(--border-color);
            overflow: hidden;
        }

        /* Coin stack motif via CSS pattern */
        .hero-banner::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.3;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .breadcrumb {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: inline-block;
            background: rgba(35, 32, 18, 0.8);
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
        }

        .hero-banner h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            color: var(--accent-gold);
            margin-bottom: 24px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .meta-chips {
            display: flex;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .chip {
            background-color: var(--surface-color);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .chip::before {
            content: '';
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--accent-green);
            border-radius: 50%;
        }

        .intro-box {
            background-color: var(--surface-color);
            border-left: 4px solid var(--accent-gold);
            padding: 24px 32px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-size: 1.125rem;
            color: var(--text-main);
            text-align: left;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            position: relative;
        }

        /* --- MAIN CONTENT --- */
        .content-area {
            padding: 60px 0;
            max-width: 800px;
            margin: 0 auto;
        }

        .section-block {
            margin-bottom: 60px;
            position: relative;
        }

        .section-block h2 {
            font-size: 2.25rem;
            color: var(--accent-gold);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 15px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 10px;
        }

        .section-block h2::before {
            content: '';
            display: block;
            width: 24px;
            height: 24px;
            background: repeating-linear-gradient(
                0deg,
                var(--accent-gold),
                var(--accent-gold) 4px,
                transparent 4px,
                transparent 8px
            );
            border-radius: 2px;
        }

        .section-block p {
            margin-bottom: 20px;
            color: var(--text-muted);
        }

        .section-block p a {
            color: var(--accent-gold);
            font-weight: 700;
            border-bottom: 1px dashed var(--accent-gold);
        }

        .section-block p a:hover {
            border-bottom-style: solid;
        }

        /* Custom List Styling (Ledger Style) */
        .styled-list {
            list-style: none;
            margin: 30px 0;
            background-color: var(--surface-color);
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .styled-list li {
            position: relative;
            padding-left: 40px;
            margin-bottom: 16px;
            color: var(--text-main);
            font-weight: 600;
        }

        .styled-list li:last-child {
            margin-bottom: 0;
        }

        .styled-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 24px;
            height: 24px;
            background-color: rgba(132, 204, 22, 0.1);
            border: 1px solid var(--accent-green);
            color: var(--accent-green);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 0.8rem;
        }

        /* --- FAQ SECTION --- */
        .faq-section {
            background-color: var(--surface-color);
            padding: 60px 0;
            border-top: 1px dashed var(--border-color);
            border-bottom: 1px dashed var(--border-color);
        }

        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-wrapper h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 40px;
            color: var(--accent-gold);
        }

        details {
            background-color: var(--bg-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        details[open] {
            border-color: var(--accent-gold);
            box-shadow: 0 4px 12px rgba(245, 197, 66, 0.05);
        }

        summary {
            padding: 20px 24px;
            font-family: var(--font-display);
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--text-main);
            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-gold);
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        details[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }

        details p {
            padding: 0 24px 24px;
            color: var(--text-muted);
            margin: 0;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        /* --- RELATED LINKS --- */
        .related-section {
            padding: 60px 0;
            max-width: 800px;
            margin: 0 auto;
        }

        .related-section h2 {
            font-size: 2rem;
            margin-bottom: 30px;
            text-align: center;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }

        .related-card {
            background-color: var(--surface-color);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
        }

        .related-card:hover {
            border-color: var(--accent-gold);
            background-color: var(--surface-hover);
            transform: translateY(-2px);
        }

        .related-card a {
            font-family: var(--font-display);
            font-size: 1.25rem;
            color: var(--text-main);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .related-card:hover a {
            color: var(--accent-gold);
        }

        /* --- FINAL CTA --- */
        .final-cta {
            background: linear-gradient(45deg, var(--surface-color), #2a2512);
            border: 1px solid var(--accent-gold);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            margin: 40px auto 80px;
            max-width: 800px;
            position: relative;
            overflow: hidden;
        }

        .final-cta::before {
            content: '';
            position: absolute;
            top: -50%; left: -50%; width: 200%; height: 200%;
            background: radial-gradient(circle, rgba(245,197,66,0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .final-cta h2 {
            font-size: 2.5rem;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .final-cta p {
            color: var(--text-muted);
            margin-bottom: 32px;
            font-size: 1.125rem;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            position: relative;
            z-index: 1;
        }

        /* --- FOOTER (A2) --- */
        footer {
            background-color: var(--bg-color);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-tagline {
            color: var(--text-muted);
            margin-top: 15px;
            font-size: 0.95rem;
        }

        .footer-links h4 {
            color: var(--text-main);
            font-size: 1.25rem;
            margin-bottom: 20px;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .footer-links a:hover {
            color: var(--accent-gold);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        /* --- MEDIA QUERIES --- */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop, .header-inner .header-ctas {
                display: none;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero-banner {
                padding: 40px 0 30px;
            }

            .intro-box {
                padding: 20px;
                font-size: 1rem;
            }

            .section-block h2 {
                font-size: 1.75rem;
            }

            .faq-wrapper h2, .final-cta h2, .related-section h2 {
                font-size: 2rem;
            }

            .cta-buttons {
                flex-direction: column;
            }

            .final-cta {
                padding: 40px 20px;
            }
        }

        @media (max-width: 390px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .hero-banner h1 {
                font-size: 2.25rem;
            }

            .meta-chips {
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }

            .mobile-nav .header-ctas {
                flex-direction: column;
                gap: 10px;
            }

            .btn {
                width: 100%;
            }
        }


/* 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; }