:root {
            --bg: #081018;
            --surface: #122030;
            --surface-alt: #16283d;
            --accent: #60a5fa;
            --accent-hover: #3b82f6;
            --accent2: #fbbf24;
            --accent2-hover: #f59e0b;
            --text: #f0f6ff;
            --muted: #8fa0b8;
            --border: rgba(96, 165, 250, 0.15);
            --border-highlight: rgba(96, 165, 250, 0.4);

            --font-display: 'Anton', sans-serif;
            --font-body: 'Barlow', sans-serif;

            --container-px: 20px;
            --radius: 4px; /* Sharp edges for steel motif */
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            background-image:
                linear-gradient(rgba(8, 16, 24, 0.95), rgba(8, 16, 24, 0.95)),
                repeating-linear-gradient(45deg, rgba(96, 165, 250, 0.03) 0px, rgba(96, 165, 250, 0.03) 1px, transparent 1px, transparent 10px);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--container-px);
            padding-right: var(--container-px);
        }

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

        a:hover {
            color: var(--accent2);
        }

        /* BUTTONS */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            min-height: 44px;
            font-family: var(--font-display);
            font-size: 1rem;
        }

        .btn-primary {
            background-color: var(--accent2);
            color: #000;
            border: 1px solid var(--accent2);
        }

        .btn-primary:hover {
            background-color: var(--accent2-hover);
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .btn-secondary:hover {
            background-color: rgba(96, 165, 250, 0.1);
            color: var(--text);
            border-color: var(--text);
        }

        /* HEADER (Verbatim styling) */
        header {
            background-color: rgba(8, 16, 24, 0.98);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(10px);
        }

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

        .logo {
            font-family: var(--font-display);
            font-size: 28px;
            color: var(--text);
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo:hover {
            color: var(--accent);
        }

        .nav-links {
            display: none;
        }

        .nav-links a {
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            padding: 10px;
        }

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

        .header-ctas {
            display: none;
            gap: 12px;
        }

        .mobile-toggle {
            display: block;
            background: none;
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 24px;
            cursor: pointer;
            padding: 6px 12px;
            border-radius: var(--radius);
            min-height: 44px;
            min-width: 44px;
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background-color: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 10px var(--container-px);
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            padding: 12px 0;
            color: var(--text);
            font-weight: 600;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            min-height: 44px;
            display: flex;
            align-items: center;
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        /* HERO SECTION */
        .hero {
            padding: 60px 0 40px;
            background: radial-gradient(circle at top right, rgba(96, 165, 250, 0.15), transparent 50%),
                        linear-gradient(180deg, transparent, var(--bg));
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: linear-gradient(90deg, var(--border) 1px, transparent 1px),
                              linear-gradient(var(--border) 1px, transparent 1px);
            background-size: 40px 40px;
            opacity: 0.2;
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: inline-block;
            background: var(--surface);
            padding: 6px 12px;
            border-radius: 2px;
            border-left: 3px solid var(--accent);
        }

        h1 {
            font-family: var(--font-display);
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            line-height: 1.1;
            color: var(--text);
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }

        .meta-chips {
            display: flex;
            gap: 12px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .chip {
            background-color: var(--surface-alt);
            color: var(--muted);
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid var(--border);
            border-radius: 20px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .chip::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 6px;
            background-color: var(--accent);
            border-radius: 50%;
        }

        .intro-blockquote {
            background-color: var(--surface);
            border: 1px solid var(--border-highlight);
            padding: 24px;
            font-size: 1.1rem;
            color: var(--text);
            position: relative;
            box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
        }

        .intro-blockquote::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 4px;
            height: 100%;
            background-color: var(--accent);
        }

        /* MAIN CONTENT */
        .content-area {
            padding: 60px 0;
        }

        .section-grid {
            display: grid;
            gap: 40px;
        }

        .data-card {
            background-color: var(--surface);
            border: 1px solid var(--border);
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }

        .data-card:hover {
            border-color: var(--border-highlight);
            background-color: var(--surface-alt);
        }

        .card-badge {
            position: absolute;
            top: -15px;
            left: 20px;
            background: var(--bg);
            color: var(--accent2);
            font-family: var(--font-display);
            font-size: 1.2rem;
            padding: 0 10px;
            border: 1px solid var(--border);
            letter-spacing: 2px;
        }

        .data-card h2 {
            font-family: var(--font-display);
            font-size: 1.8rem;
            color: var(--text);
            margin-bottom: 20px;
            line-height: 1.2;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            border-bottom: 1px dashed var(--border);
            padding-bottom: 15px;
        }

        .data-card p {
            color: var(--muted);
            margin-bottom: 16px;
            font-size: 1.05rem;
        }

        .data-card p:last-child {
            margin-bottom: 0;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-family: var(--font-display);
            font-size: 2.5rem;
            color: var(--text);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

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

        summary {
            padding: 20px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            position: relative;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 44px;
        }

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

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

        details[open] summary::after {
            content: '-';
            color: var(--accent2);
        }

        details[open] summary {
            background-color: rgba(96, 165, 250, 0.05);
            border-bottom: 1px solid var(--border);
        }

        details p {
            padding: 20px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* RELATED LINKS */
        .related-section {
            padding: 60px 0;
        }

        .related-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
        }

        .related-link {
            display: inline-block;
            background-color: var(--surface);
            border: 1px solid var(--border);
            padding: 12px 24px;
            color: var(--text);
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.9rem;
            letter-spacing: 1px;
            border-radius: 30px;
        }

        .related-link:hover {
            background-color: var(--accent);
            color: #000;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* CTA SECTION */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--surface-alt) 0%, var(--bg) 100%);
            border-top: 1px solid var(--border-highlight);
            text-align: center;
            position: relative;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: 0; left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--accent2);
        }

        .cta-content {
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-family: var(--font-display);
            font-size: 3rem;
            margin-bottom: 20px;
            text-transform: uppercase;
            line-height: 1.1;
        }

        .cta-content p {
            color: var(--muted);
            font-size: 1.1rem;
            margin-bottom: 30px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* FOOTER (Verbatim styling) */
        footer {
            background-color: #050a0f;
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
            text-align: center;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 32px;
            color: var(--text);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .footer-tagline {
            color: var(--muted);
            margin-bottom: 30px;
            font-size: 15px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px 25px;
            margin-bottom: 40px;
            max-width: 800px;
            margin-inline: auto;
        }

        .footer-links a {
            color: var(--muted);
            font-size: 14px;
        }

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

        .footer-copy {
            color: #4a5568;
            font-size: 14px;
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
        }

        /* MEDIA QUERIES */
        @media (min-width: 768px) {
            .header-inner {
                height: 80px;
            }
            .mobile-toggle {
                display: none;
            }
            .nav-links {
                display: flex;
                gap: 5px;
            }
            .header-ctas {
                display: flex;
            }
            .section-grid {
                grid-template-columns: 1fr 1fr;
            }
            .data-card:nth-child(3),
            .data-card:nth-child(4) {
                grid-column: span 2;
            }
            .data-card:nth-child(4) {
                background: linear-gradient(to right, var(--surface), var(--surface-alt));
                border-left: 4px solid var(--accent);
            }
        }

        @media (min-width: 1024px) {
            .data-card:nth-child(3),
            .data-card:nth-child(4) {
                grid-column: span 1;
            }
            .data-card:nth-child(4) {
                background: var(--surface);
                border-left: 1px solid var(--border);
            }
            .section-grid {
                grid-template-columns: 1fr 1fr;
            }
        }


/* 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; }