:root {
            --bg: #061218;
            --surface: #0d2230;
            --surface-hover: #153448;
            --accent: #22d3ee;
            --accent-glow: rgba(34, 211, 238, 0.3);
            --accent2: #a3e635;
            --text: #f0faff;
            --muted: #8fadb8;
            --border: #1e3a4c;

            --font-display: 'Chakra Petch', sans-serif;
            --font-body: 'Manrope', sans-serif;

            --container-w: 1024px;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-asym: 24px 4px 24px 4px;
        }

        * {
            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;
            overflow-x: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        h1, h2, h3, h4 {
            font-family: var(--font-display);
            line-height: 1.2;
            color: var(--text);
        }

        .container {
            width: 100%;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* HEADER (From Part A) */
        header {
            background: rgba(6, 18, 24, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }

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

        .logo {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text);
            text-transform: lowercase;
        }

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

        .nav-links {
            display: none;
            gap: 24px;
        }

        .nav-links a {
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 0;
            position: relative;
        }

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

        .mobile-toggle {
            display: block;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 8px;
            min-width: 44px;
            min-height: 44px;
        }

        @media (min-width: 1024px) {
            .mobile-toggle { display: none; }
            .nav-links { display: flex; }
        }

        /* Mobile Menu Active State */
        .nav-links.active {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 70px;
            left: 0;
            right: 0;
            background: var(--surface);
            padding: 20px;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 10px 20px rgba(0,0,0,0.5);
        }

        /* HERO SECTION */
        .hero {
            position: relative;
            padding: 60px 0 80px;
            background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
            text-align: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at 50% 0%, var(--accent-glow) 0%, transparent 60%);
            pointer-events: none;
        }

        .breadcrumb {
            font-size: 0.85rem;
            color: var(--muted);
            margin-bottom: 24px;
            display: inline-block;
            padding: 6px 16px;
            background: rgba(13, 34, 48, 0.6);
            border: 1px solid var(--border);
            border-radius: 20px;
        }

        .hero h1 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
            position: relative;
            z-index: 1;
        }

        .meta-chips {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .chip {
            font-size: 0.8rem;
            font-family: var(--font-display);
            font-weight: 600;
            color: var(--bg);
            background: var(--accent);
            padding: 4px 12px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .chip:nth-child(2) {
            background: var(--accent2);
        }

        /* Wave Divider */
        .wave-divider {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            overflow: hidden;
            line-height: 0;
            transform: translateY(1px);
        }
        .wave-divider svg {
            display: block;
            width: calc(100% + 1.3px);
            height: 40px;
        }
        .wave-divider path { fill: var(--bg); }

        /* CONTENT AREA */
        .content-area {
            padding: 40px 20px 80px;
            max-width: 800px; /* Narrower for optimal reading */
            margin: 0 auto;
        }

        .intro-box {
            background: var(--surface);
            border-left: 4px solid var(--accent);
            padding: 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-size: 1.1rem;
            color: var(--text);
            margin-bottom: 40px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }

        .content-section {
            margin-bottom: 48px;
        }

        .content-section h2 {
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .content-section h2::before {
            content: '';
            display: block;
            width: 32px;
            height: 2px;
            background: var(--accent2);
        }

        .content-section p {
            margin-bottom: 16px;
            color: var(--muted);
            font-size: 1rem;
        }

        .content-section p strong {
            color: var(--text);
        }

        /* Content Specific Layouts */
        .step-list {
            list-style: none;
            margin: 24px 0;
            padding: 0;
            display: grid;
            gap: 16px;
        }

        .step-list li {
            background: var(--surface);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .step-list li::before {
            content: '✓';
            display: flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            background: rgba(163, 230, 53, 0.1);
            color: var(--accent2);
            border-radius: 50%;
            font-weight: bold;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .feature-grid {
            list-style: none;
            margin: 24px 0;
            padding: 0;
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .feature-grid li {
            background: linear-gradient(135deg, var(--surface) 0%, rgba(13, 34, 48, 0.4) 100%);
            padding: 20px;
            border-radius: var(--radius-asym);
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
            color: var(--text);
        }

        .feature-grid li::after {
            content: '';
            position: absolute;
            top: 0; right: 0;
            width: 60px; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.05));
            transform: skewX(-15deg);
        }

        .security-box {
            background: rgba(34, 211, 238, 0.05);
            border: 1px dashed var(--accent);
            padding: 24px;
            border-radius: var(--radius-md);
            margin-top: 24px;
        }

        .security-box p:last-child {
            margin-bottom: 0;
        }

        /* FAQ Section */
        .faq-section {
            margin-top: 60px;
            background: var(--surface);
            padding: 40px 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
        }

        .faq-section h2 {
            text-align: center;
            margin-bottom: 30px;
            color: var(--text);
        }

        .faq-section h2::before { display: none; }

        details {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        details[open] {
            border-color: var(--accent);
            box-shadow: 0 4px 12px rgba(34, 211, 238, 0.1);
        }

        summary {
            padding: 16px 20px;
            font-family: var(--font-display);
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            min-height: 56px;
        }

        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);
            color: var(--accent2);
        }

        details p {
            padding: 0 20px 20px;
            color: var(--muted);
            margin: 0;
        }

        /* RELATED LINKS */
        .related-links {
            margin: 60px 0;
        }

        .related-links h2 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            text-align: center;
        }
        .related-links h2::before { display: none; }

        .links-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .links-grid a {
            display: inline-flex;
            align-items: center;
            padding: 12px 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--muted);
            min-height: 44px;
        }

        .links-grid a:hover {
            background: var(--surface-hover);
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* GRAND CTA */
        .grand-cta {
            background: linear-gradient(135deg, var(--surface) 0%, #081b26 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 60px 20px;
            text-align: center;
            margin-bottom: 40px;
            position: relative;
            overflow: hidden;
        }

        .grand-cta::before {
            content: '';
            position: absolute;
            top: -50%; left: -50%;
            width: 200%; height: 200%;
            background: radial-gradient(circle at center, rgba(163, 230, 53, 0.05) 0%, transparent 50%);
            pointer-events: none;
        }

        .grand-cta h2 {
            font-size: 2rem;
            margin-bottom: 16px;
            color: var(--text);
            justify-content: center;
        }
        .grand-cta h2::before { display: none; }

        .grand-cta p {
            color: var(--muted);
            margin-bottom: 32px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: 30px;
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            min-height: 48px;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--bg);
            box-shadow: 0 4px 15px rgba(34, 211, 238, 0.3);
        }

        .btn-primary:hover {
            background: #1cb8d1;
            color: var(--bg);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(34, 211, 238, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: var(--accent2);
            border: 2px solid var(--accent2);
        }

        .btn-secondary:hover {
            background: rgba(163, 230, 53, 0.1);
            color: var(--accent2);
            transform: translateY(-2px);
        }

        /* FOOTER (From Part A) */
        footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 60px 0 20px;
            margin-top: 40px;
        }

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

        .footer-brand p {
            color: var(--muted);
            margin-top: 16px;
            font-size: 0.9rem;
            max-width: 300px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .footer-links div {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: var(--muted);
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            color: var(--muted);
            font-size: 0.85rem;
        }

        /* MEDIA QUERIES */
        @media (min-width: 768px) {
            .hero h1 { font-size: 2.8rem; }
            .content-area { padding: 60px 20px 100px; }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 2fr; }
            .footer-links { grid-template-columns: repeat(3, 1fr); }
            .wave-divider svg { height: 60px; }
        }

        @media (min-width: 1024px) {
            .hero { padding: 80px 0 100px; }
            .hero h1 { font-size: 3.2rem; }
        }


/* 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; }