:root {
            --bg: #04140f;
            --surface: #0a241b;
            --surface-hover: #113629;
            --accent: #f0b429;
            --accent-hover: #d99f1c;
            --accent2: #2dd4a7;
            --text: #eefbf5;
            --muted: #8fb3a5;
            --border: rgba(45, 212, 167, 0.15);
            --border-strong: rgba(45, 212, 167, 0.3);

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

            --container-px: 20px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 24px;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: var(--accent2);
            text-decoration: none;
            transition: var(--transition);
        }

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

        h1, h2, h3, h4 {
            font-family: var(--font-display);
            font-weight: 500;
            line-height: 1.1;
            margin-bottom: 1rem;
        }

        p {
            margin-bottom: 1.25rem;
            color: var(--text);
        }

        /* --- HEADER (Part A1 constraints) --- */
        header {
            background-color: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            background-color: rgba(10, 36, 27, 0.95);
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .logo {
            font-family: var(--font-display);
            font-size: 2.25rem;
            color: var(--accent);
            text-transform: uppercase;
            font-weight: 600;
            letter-spacing: 1px;
            line-height: 1;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 30px;
            height: 21px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 0;
            z-index: 1001;
        }

        .menu-toggle span {
            display: block;
            width: 100%;
            height: 3px;
            background-color: var(--accent2);
            border-radius: 3px;
            transition: var(--transition);
        }

        #main-nav ul {
            display: flex;
            gap: 32px;
            list-style: none;
        }

        #main-nav a {
            color: var(--text);
            font-family: var(--font-body);
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 0;
            display: block;
        }

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

        /* --- HERO SECTION --- */
        .hero {
            padding: 40px 0 60px;
            background: radial-gradient(circle at top right, rgba(240, 180, 41, 0.05) 0%, transparent 50%),
                        linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
            border-bottom: 1px solid var(--border);
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.3;
        }

        .breadcrumb {
            font-size: 0.875rem;
            color: var(--muted);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            color: var(--text);
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        .meta-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 32px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background-color: rgba(45, 212, 167, 0.1);
            border: 1px solid var(--border-strong);
            border-radius: 20px;
            font-size: 0.875rem;
            color: var(--accent2);
            font-weight: 600;
        }

        .intro-card {
            background-color: var(--surface);
            border: 1px solid var(--border);
            border-left: 4px solid var(--accent);
            padding: 24px 32px;
            border-radius: var(--radius-md);
            font-size: 1.125rem;
            line-height: 1.7;
            color: var(--text);
            box-shadow: 0 8px 32px rgba(0,0,0,0.2);
        }

        .intro-card p { margin: 0; }

        /* --- MAIN ARTICLE --- */
        .article-content {
            padding: 60px 0;
            display: grid;
            gap: 60px;
        }

        .content-section {
            display: grid;
            gap: 24px;
        }

        .content-section h2 {
            font-size: clamp(2rem, 3vw, 2.5rem);
            color: var(--accent);
            border-bottom: 1px solid var(--border);
            padding-bottom: 12px;
            margin-bottom: 16px;
        }

        .text-block p {
            font-size: 1.05rem;
            color: rgba(238, 251, 245, 0.9);
        }

        /* Styled Lists */
        .styled-list {
            list-style: none;
            margin: 24px 0;
            display: grid;
            gap: 16px;
        }

        .styled-list li {
            position: relative;
            padding-left: 48px;
            font-size: 1.05rem;
            background: var(--surface);
            padding: 20px 20px 20px 60px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            min-height: 64px;
        }

        /* Numbered steps for specific lists */
        .step-list {
            counter-reset: step-counter;
        }

        .step-list li::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            width: 28px;
            height: 28px;
            background-color: rgba(240, 180, 41, 0.15);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-display);
            font-size: 1.25rem;
            font-weight: 600;
            border: 1px solid rgba(240, 180, 41, 0.3);
        }

        /* Checkmark list for other lists */
        .check-list li::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            width: 20px;
            height: 20px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232dd4a7' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
            background-size: contain;
            background-repeat: no-repeat;
        }

        .callout-box {
            background: linear-gradient(135deg, var(--surface) 0%, rgba(10, 36, 27, 0.5) 100%);
            border: 1px solid var(--border-strong);
            padding: 24px;
            border-radius: var(--radius-md);
            margin: 24px 0;
        }

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

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

        .faq-header h2 {
            font-size: 3rem;
            color: var(--accent);
            display: inline-block;
            position: relative;
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

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

        details[open] {
            border-color: var(--accent2);
            box-shadow: 0 4px 20px rgba(45, 212, 167, 0.05);
        }

        summary {
            padding: 20px 24px;
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            user-select: none;
        }

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

        summary::after {
            content: '+';
            font-family: var(--font-display);
            font-size: 1.8rem;
            color: var(--accent2);
            line-height: 1;
            transition: transform 0.3s ease;
        }

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

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

        details[open] p {
            border-top-color: var(--border);
            padding-top: 20px;
        }

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

        .related-section h2 {
            text-align: center;
            margin-bottom: 32px;
        }

        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .link-card {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
            background-color: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            font-family: var(--font-display);
            font-size: 1.5rem;
            color: var(--text);
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .link-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; width: 4px; height: 100%;
            background-color: var(--accent2);
            transform: scaleY(0);
            transition: transform 0.3s ease;
            transform-origin: bottom;
        }

        .link-card:hover {
            background-color: var(--surface-hover);
            border-color: var(--accent2);
            color: var(--accent);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }

        .link-card:hover::before {
            transform: scaleY(1);
        }

        /* --- CTA BLOCK --- */
        .cta-block {
            margin: 40px 0 80px;
            padding: 60px 40px;
            background: linear-gradient(135deg, var(--surface) 0%, #061b14 100%);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::after {
            content: '';
            position: absolute;
            top: -50%; right: -10%;
            width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(240, 180, 41, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-block h2 {
            font-size: clamp(2.5rem, 4vw, 3.5rem);
            margin-bottom: 16px;
            color: var(--text);
        }

        .cta-block p {
            font-size: 1.125rem;
            color: var(--muted);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: var(--radius-sm);
            min-width: 180px;
            min-height: 48px; /* Touch target */
            transition: var(--transition);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

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

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(240, 180, 41, 0.3);
        }

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

        .btn-secondary:hover {
            background-color: rgba(240, 180, 41, 0.1);
            color: var(--accent);
            transform: translateY(-2px);
        }

        /* --- FOOTER (Part A2 constraints) --- */
        footer {
            background-color: var(--surface);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 3rem;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 20px;
            line-height: 1;
        }

        .footer-tagline {
            color: var(--muted);
            margin-bottom: 40px;
            max-width: 600px;
            font-size: 1rem;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 16px;
            margin-bottom: 40px;
        }

        .footer-links a {
            color: var(--text);
            font-size: 0.95rem;
            padding: 8px 0;
            display: inline-block;
        }

        .footer-links a:hover {
            color: var(--accent2);
            padding-left: 4px;
        }

        .copyright {
            color: var(--muted);
            font-size: 0.875rem;
            border-top: 1px solid var(--border);
            padding-top: 24px;
            text-align: center;
        }

        /* --- RESPONSIVE DESIGN --- */
        @media (max-width: 1024px) {
            .article-content { gap: 40px; }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: flex; }

            #main-nav {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background-color: var(--surface);
                border-bottom: 1px solid var(--border);
                padding: 20px;
                transform: translateY(-150%);
                opacity: 0;
                transition: var(--transition);
                z-index: 999;
                box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            }

            #main-nav.active {
                transform: translateY(0);
                opacity: 1;
            }

            #main-nav ul {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }

            #main-nav a {
                padding: 12px;
                font-size: 1.1rem;
            }

            .intro-card {
                padding: 20px;
            }

            .styled-list li {
                padding: 16px 16px 16px 50px;
            }

            .step-list li::before {
                left: 12px;
                width: 24px;
                height: 24px;
                font-size: 1rem;
            }

            .check-list li::before {
                left: 16px;
                width: 18px;
                height: 18px;
            }

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

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

            .btn { width: 100%; }
        }

        @media (max-width: 390px) {
            .hero h1 { font-size: 2.2rem; }
            .content-section h2 { font-size: 1.8rem; }
            .faq-header h2 { font-size: 2.5rem; }
            .footer-links { 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; }