:root {
            --bg: #061218;
            --surface: #0d2230;
            --surface-hover: #153246;
            --accent: #22d3ee;
            --accent-glow: rgba(34, 211, 238, 0.4);
            --accent2: #a3e635;
            --accent2-hover: #8cc92a;
            --text: #f0faff;
            --muted: #8fadb8;
            --border: rgba(143, 173, 184, 0.2);

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

            --container-w: 1140px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { 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;
        }

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

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

        /* --- HEADER (Part A1 Styles) --- */
        header {
            background-color: rgba(6, 18, 24, 0.95);
            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 {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            text-transform: lowercase;
        }
        .logo span { color: var(--accent); }
        .nav-links {
            display: none;
            gap: 24px;
        }
        .nav-links a {
            color: var(--text);
            font-family: var(--font-display);
            font-weight: 600;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .nav-links a:hover { color: var(--accent); text-shadow: 0 0 10px var(--accent-glow); }
        .mobile-toggle {
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
            display: block;
            padding: 5px;
        }

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

        /* Mobile Menu Active State */
        .nav-links.active {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--surface);
            padding: 20px;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }

        /* --- HERO BANNER --- */
        .hero {
            position: relative;
            padding: 60px 0 80px;
            background: radial-gradient(circle at top right, rgba(34,211,238,0.1) 0%, transparent 50%),
                        linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        /* Subtle Wave Decorative SVG via CSS */
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0; height: 100px;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 1200 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0v46.29c47.79 22.2 103.59 32.17 158 28 70.36-5.37 136.33-33.31 206.8-37.5 73.84-4.36 147.54 16.88 218.2 35.26 69.27 18 138.3 24.88 209.4 13.08 36.15-6 69.85-17.84 104.45-29.34C989.49 25 1113-14.29 1200 52.47V0z' fill='%23061218' fill-opacity='.2'/%3E%3C/svg%3E");
            background-size: cover;
            background-position: center bottom;
            pointer-events: none;
        }

        .breadcrumb {
            font-size: 0.85rem;
            color: var(--muted);
            margin-bottom: 20px;
            font-weight: 500;
        }
        .breadcrumb span { color: var(--accent); }

        h1 {
            font-family: var(--font-display);
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--text);
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 0 4px 20px rgba(0,0,0,0.5);
        }
        h1 span { color: var(--accent); }

        .meta-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .chip {
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--accent);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            font-family: var(--font-display);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .chip::before {
            content: '';
            display: inline-block;
            width: 6px; height: 6px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent);
        }

        /* --- LAYOUT --- */
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            padding-top: 60px;
            padding-bottom: 60px;
        }
        @media (min-width: 1024px) {
            .content-wrapper { grid-template-columns: 2fr 1fr; gap: 60px; }
        }

        /* --- MAIN CONTENT --- */
        .intro-lead {
            font-size: 1.1rem;
            color: var(--text);
            background: var(--surface);
            padding: 24px;
            border-left: 4px solid var(--accent);
            border-radius: 0 8px 8px 0;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }

        .guide-section { margin-bottom: 50px; position: relative; }

        .guide-section h2 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            color: var(--text);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* Stylized numbers for sections */
        .guide-section { counter-increment: step-counter; }
        .guide-section h2::before {
            content: "0" counter(step-counter);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px; height: 36px;
            background: var(--accent);
            color: var(--bg);
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 700;
            transform: rotate(-5deg);
        }

        .guide-section p {
            color: var(--muted);
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .guide-section p a {
            color: var(--accent);
            text-decoration: underline;
            text-decoration-color: rgba(34, 211, 238, 0.4);
            text-underline-offset: 4px;
            font-weight: 600;
        }
        .guide-section p a:hover {
            color: var(--accent2);
            text-decoration-color: var(--accent2);
        }

        /* Custom List */
        .custom-list {
            list-style: none;
            margin: 20px 0;
            padding: 24px;
            background: rgba(13, 34, 48, 0.5);
            border: 1px solid var(--border);
            border-radius: 12px;
        }
        .custom-list li {
            position: relative;
            padding-left: 32px;
            margin-bottom: 12px;
            color: var(--text);
        }
        .custom-list li:last-child { margin-bottom: 0; }
        .custom-list li::before {
            content: '✓';
            position: absolute;
            left: 0; top: 0;
            color: var(--accent2);
            font-weight: bold;
            font-family: var(--font-display);
            background: rgba(163, 230, 53, 0.1);
            width: 20px; height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 0.8rem;
        }

        /* --- FAQ SECTION --- */
        .faq-container h2 {
            font-family: var(--font-display);
            font-size: 1.8rem;
            margin-bottom: 24px;
            text-align: center;
            color: var(--text);
        }
        details {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        details:hover { border-color: rgba(34, 211, 238, 0.4); box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
        summary {
            padding: 20px;
            font-family: var(--font-display);
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        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[open] summary { border-bottom: 1px solid var(--border); }
        details p {
            padding: 20px;
            color: var(--muted);
            margin: 0;
        }

        /* --- SIDEBAR --- */
        .sidebar-widget {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            position: sticky;
            top: 90px;
        }
        .sidebar-widget h3 {
            font-family: var(--font-display);
            color: var(--accent);
            font-size: 1.2rem;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h3::before {
            content: '';
            display: block;
            width: 12px; height: 12px;
            background: var(--accent2);
            border-radius: 2px;
            transform: rotate(45deg);
        }
        .related-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .related-links a {
            display: block;
            padding: 12px 16px;
            background: rgba(6, 18, 24, 0.5);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text);
            font-weight: 500;
            transition: var(--transition);
        }
        .related-links a:hover {
            background: var(--accent);
            color: var(--bg);
            border-color: var(--accent);
            transform: translateX(5px);
        }

        /* --- CTA BLOCK --- */
        .cta-block {
            background: linear-gradient(135deg, var(--surface) 0%, #0a1924 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 60px 20px;
            text-align: center;
            margin-top: 40px;
        }
        .cta-content {
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            margin-bottom: 16px;
            color: var(--text);
        }
        .cta-content p { color: var(--muted); margin-bottom: 32px; }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: 8px;
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            cursor: pointer;
            min-width: 160px;
            min-height: 44px; /* Touch target */
        }
        .btn-primary {
            background: var(--accent2);
            color: var(--bg);
            border: none;
            box-shadow: 0 4px 15px rgba(163, 230, 53, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent2-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(163, 230, 53, 0.4);
            color: var(--bg);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
        }
        .btn-outline:hover {
            background: rgba(34, 211, 238, 0.1);
            color: var(--text);
        }

        /* --- FOOTER (Part A2 Styles) --- */
        footer {
            background-color: #040c11;
            padding: 60px 0 20px;
            border-top: 1px solid var(--border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (min-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 2fr; }
        }
        .footer-brand p {
            color: var(--muted);
            margin-top: 16px;
            font-size: 0.9rem;
            max-width: 300px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }
        @media (min-width: 480px) {
            .footer-links { grid-template-columns: repeat(2, 1fr); }
        }
        @media (min-width: 1024px) {
            .footer-links { grid-template-columns: repeat(3, 1fr); }
        }
        .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); padding-left: 4px; }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(143, 173, 184, 0.1);
            color: var(--muted);
            font-size: 0.8rem;
        }


/* 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; }