:root {
            --bg: #050e16;
            --surface: #0c1e2e;
            --surface-hover: #112a40;
            --accent: #ffc857;
            --accent2: #22d3ee;
            --text: #f0faff;
            --muted: #8fadc2;
            --border: rgba(34, 211, 238, 0.15);
            --font-display: 'Montserrat', sans-serif;
            --font-body: 'Lora', serif;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 50px;
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.1);
            --shadow-gold: 0 0 20px rgba(255, 200, 87, 0.1);
        }

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

        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: var(--font-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            background-image:
                radial-gradient(circle at 10% 20%, rgba(34, 211, 238, 0.03) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 200, 87, 0.03) 0%, transparent 40%);
            background-attachment: fixed;
        }

        h1, h2, h3, h4, h5, h6, .logo, .btn, .nav-links a, .chip, summary {
            font-family: var(--font-display);
        }

        a {
            color: var(--accent2);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* HEADER STYLES (Matching A1 Structure) */
        header {
            background-color: rgba(5, 14, 22, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-bottom: 1px solid var(--border);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .nav-links {
            display: flex;
            gap: 24px;
        }

        .nav-links a {
            color: var(--text);
            font-weight: 600;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

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

        .nav-actions {
            display: flex;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            min-height: 44px;
        }

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

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

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

        .btn-secondary:hover {
            background-color: var(--accent2);
            color: var(--bg);
            box-shadow: var(--shadow-glow);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 28px;
            cursor: pointer;
            min-width: 44px;
            min-height: 44px;
        }

        /* HERO SECTION */
        .hero {
            padding: 140px 0 60px;
            text-align: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100vw;
            height: 100%;
            background: radial-gradient(ellipse at top, rgba(34, 211, 238, 0.1) 0%, transparent 70%);
            z-index: -1;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 20px;
            font-family: var(--font-display);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .audio-wave-decor {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            margin-bottom: 24px;
        }

        .wave-bar {
            width: 6px;
            background-color: var(--accent2);
            border-radius: 3px;
            animation: soundWave 1.2s ease-in-out infinite alternate;
        }

        .wave-bar:nth-child(1) { height: 16px; animation-delay: 0.0s; }
        .wave-bar:nth-child(2) { height: 32px; animation-delay: 0.2s; background-color: var(--accent); }
        .wave-bar:nth-child(3) { height: 24px; animation-delay: 0.4s; }
        .wave-bar:nth-child(4) { height: 40px; animation-delay: 0.6s; background-color: var(--accent); }
        .wave-bar:nth-child(5) { height: 16px; animation-delay: 0.8s; }

        @keyframes soundWave {
            0% { transform: scaleY(0.5); opacity: 0.5; }
            100% { transform: scaleY(1); opacity: 1; }
        }

        .hero h1 {
            font-size: clamp(32px, 5vw, 48px);
            color: var(--text);
            margin-bottom: 24px;
            line-height: 1.2;
            text-shadow: 0 4px 12px rgba(0,0,0, 0.5);
        }

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

        .chip {
            background-color: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--accent2);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .intro-card {
            background: linear-gradient(145deg, var(--surface), rgba(12, 30, 46, 0.5));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            max-width: 900px;
            margin: 0 auto;
            box-shadow: var(--shadow-glow);
            font-size: 18px;
            color: var(--text);
            position: relative;
            overflow: hidden;
        }

        .intro-card::after {
            content: '♫';
            position: absolute;
            bottom: -20px;
            right: 10px;
            font-size: 120px;
            color: rgba(255, 200, 87, 0.05);
            font-family: var(--font-display);
            line-height: 1;
            transform: rotate(-15deg);
        }

        /* MAIN CONTENT STYLES */
        .content-section {
            padding: 40px 0;
            max-width: 900px;
            margin: 0 auto;
        }

        .content-card {
            background-color: var(--surface);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-bottom: 40px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            border-color: rgba(34, 211, 238, 0.2);
        }

        .content-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--accent2), var(--accent));
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            opacity: 0.5;
        }

        .content-card h2 {
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .content-card h2::before {
            content: '';
            display: block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--accent2);
            box-shadow: 0 0 10px var(--accent2);
        }

        .content-card p {
            margin-bottom: 20px;
            color: rgba(240, 250, 255, 0.9);
        }

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

        .content-card a {
            border-bottom: 1px dashed var(--accent2);
            padding-bottom: 2px;
        }

        .content-card a:hover {
            border-bottom-color: var(--accent);
        }

        /* CUSTOM LIST FOR TIPS */
        .tips-list {
            list-style: none;
            margin-top: 24px;
            background: rgba(5, 14, 22, 0.5);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid rgba(255, 200, 87, 0.1);
        }

        .tips-list li {
            position: relative;
            padding-left: 40px;
            margin-bottom: 20px;
            color: var(--text);
        }

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

        .tips-list li::before {
            content: '♪';
            position: absolute;
            left: 0;
            top: -2px;
            width: 28px;
            height: 28px;
            background-color: rgba(255, 200, 87, 0.1);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-display);
            font-weight: bold;
            font-size: 14px;
            border: 1px solid rgba(255, 200, 87, 0.3);
        }

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

        .section-title {
            text-align: center;
            font-size: 28px;
            margin-bottom: 40px;
            color: var(--text);
        }

        .section-title span {
            color: var(--accent2);
        }

        details {
            background-color: rgba(5, 14, 22, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        details[open] {
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        }

        summary {
            padding: 20px 24px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--accent);
        }

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

        summary::after {
            content: '+';
            font-size: 24px;
            color: var(--accent2);
            transition: transform 0.3s ease;
        }

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

        details p {
            padding: 0 24px 24px;
            color: var(--muted);
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
            margin-top: 5px;
        }

        /* RELATED LINKS */
        .related-links {
            margin-top: 60px;
            text-align: center;
        }

        .link-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-top: 24px;
        }

        .link-card {
            background: linear-gradient(45deg, var(--surface), rgba(34, 211, 238, 0.05));
            border: 1px solid var(--border);
            padding: 16px 24px;
            border-radius: var(--radius-pill);
            font-family: var(--font-display);
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: all 0.3s ease;
        }

        .link-card::before {
            content: '✦';
            color: var(--accent);
        }

        .link-card:hover {
            background: var(--accent2);
            color: var(--bg);
            border-color: var(--accent2);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }

        .link-card:hover::before {
            color: var(--bg);
        }

        /* CTA SECTION */
        .cta-section {
            margin: 80px 0;
            background: linear-gradient(135deg, rgba(12, 30, 46, 0.9), rgba(5, 14, 22, 0.9)),
                        radial-gradient(circle at center, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
            border: 1px solid rgba(255, 200, 87, 0.2);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before, .cta-section::after {
            content: '';
            position: absolute;
            width: 150px;
            height: 150px;
            border-radius: 50%;
            background: rgba(255, 200, 87, 0.1);
            filter: blur(40px);
            z-index: 0;
        }

        .cta-section::before { top: -50px; left: -50px; }
        .cta-section::after { bottom: -50px; right: -50px; background: rgba(34, 211, 238, 0.1); }

        .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 32px;
            margin-bottom: 16px;
            color: var(--text);
        }

        .cta-section p {
            font-size: 18px;
            color: var(--muted);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .cta-buttons .btn {
            min-width: 180px;
            font-size: 16px;
            padding: 14px 28px;
        }

        /* FOOTER STYLES (Matching A2 Structure) */
        footer {
            background-color: #03080c;
            padding: 60px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-family: var(--font-display);
        }

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

        .footer-tagline {
            color: var(--muted);
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.6;
            max-width: 300px;
            font-family: var(--font-body);
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

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

        .footer-links a {
            color: var(--muted);
            font-size: 14px;
            font-weight: 500;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.05);
            color: #5a7487;
            font-size: 12px;
        }

        /* MEDIA QUERIES */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-actions {
                display: none;
            }

            .mobile-toggle {
                display: block;
            }

            header.nav-active .nav-links,
            header.nav-active .nav-actions {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: rgba(5, 14, 22, 0.98);
                padding: 20px;
                border-bottom: 1px solid var(--border);
            }

            header.nav-active .nav-actions {
                top: auto;
                bottom: -140px; /* Adjust based on nav-links height */
                position: relative;
                padding-top: 0;
                border-bottom: none;
            }

            .hero {
                padding: 120px 0 40px;
            }

            .intro-card {
                padding: 24px;
                font-size: 16px;
            }

            .content-card {
                padding: 24px;
            }

            .content-card h2 {
                font-size: 20px;
                align-items: flex-start;
            }

            .content-card h2::before {
                margin-top: 6px;
                flex-shrink: 0;
            }

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

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

        @media (max-width: 390px) {
            .footer-links {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 28px;
            }
            .meta-chips {
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }
            .chip {
                width: 100%;
                text-align: center;
                max-width: 200px;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .cta-buttons .btn {
                width: 100%;
            }
            summary {
                font-size: 16px;
                padding: 16px;
            }
            details p {
                padding: 0 16px 16px;
            }
        }


/* 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; }