:root {
        --bg: #070d12;
        --surface: #122030;
        --surface-light: #1a2f45;
        --accent: #f97316;
        --accent-hover: #ea580c;
        --accent2: #38bdf8;
        --text: #f0f8ff;
        --muted: #8fa5b8;
        --border: rgba(56, 189, 248, 0.2);
        --font-display: 'Oswald', sans-serif;
        --font-body: 'Fira Sans', sans-serif;
        --radius: 2px;
        --transition: all 0.3s ease;
    }

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

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

    a { text-decoration: none; color: inherit; transition: var(--transition); }
    ul { list-style: none; }

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

    /* Typography */
    h1, h2, h3, .brand, .footer-brand, .btn, .nav-title {
        font-family: var(--font-display);
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 10px 20px;
        font-size: 14px;
        font-weight: 500;
        border-radius: var(--radius);
        cursor: pointer;
        min-height: 44px;
        border: 1px solid transparent;
    }
    .btn-primary {
        background-color: var(--accent);
        color: #fff;
    }
    .btn-primary:hover { background-color: var(--accent-hover); }
    .btn-secondary {
        background-color: transparent;
        color: var(--accent2);
        border-color: var(--accent2);
    }
    .btn-secondary:hover {
        background-color: rgba(56, 189, 248, 0.1);
    }

    /* HEADER STYLES (Targeting Part A1) */
    header {
        background-color: var(--surface);
        border-bottom: 2px solid var(--accent);
        position: sticky;
        top: 0;
        z-index: 100;
    }
    .nav-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 70px;
    }
    .brand {
        font-size: 24px;
        font-weight: 700;
        color: var(--accent);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .nav-links { display: none; }
    .nav-actions { display: none; }
    .menu-toggle {
        background: none;
        border: none;
        color: var(--text);
        font-size: 24px;
        cursor: pointer;
        min-width: 44px;
        min-height: 44px;
    }
    .mobile-menu {
        display: none;
        background-color: var(--surface-light);
        padding: 20px;
        border-bottom: 1px solid var(--border);
    }
    .mobile-menu.active {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    .mobile-menu a {
        font-family: var(--font-display);
        font-size: 16px;
        color: var(--text);
        text-transform: uppercase;
    }
    .mobile-menu .btn { margin-top: 10px; text-align: center; }

    @media (min-width: 1024px) {
        .menu-toggle { display: none; }
        .nav-links {
            display: flex;
            gap: 24px;
        }
        .nav-links a {
            font-family: var(--font-display);
            font-size: 14px;
            color: var(--muted);
            text-transform: uppercase;
        }
        .nav-links a:hover { color: var(--accent2); }
        .nav-actions {
            display: flex;
            gap: 12px;
        }
        .mobile-menu { display: none !important; }
    }

    /* HERO BANNER - Terminal Station Look */
    .hero {
        background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
        padding: 40px 0;
        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(rgba(56, 189, 248, 0.05) 1px, transparent 1px),
            linear-gradient(90deg, rgba(56, 189, 248, 0.05) 1px, transparent 1px);
        background-size: 20px 20px;
        z-index: 1;
    }
    .hero .container { position: relative; z-index: 2; }
    .breadcrumb {
        font-size: 12px;
        color: var(--accent2);
        margin-bottom: 20px;
        font-family: var(--font-display);
        display: inline-block;
        background: rgba(56, 189, 248, 0.1);
        padding: 4px 12px;
        border-left: 2px solid var(--accent2);
    }
    .hero h1 {
        font-size: 32px;
        color: #fff;
        margin-bottom: 20px;
        line-height: 1.2;
    }
    .meta-chips {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .chip {
        font-size: 12px;
        color: var(--muted);
        background-color: var(--surface);
        padding: 6px 12px;
        border: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .chip::before {
        content: '';
        display: inline-block;
        width: 6px; height: 6px;
        background-color: var(--accent);
    }

    /* MAIN CONTENT AREA */
    .content-area {
        padding: 40px 0;
    }
    .article-container {
        max-width: 800px;
        margin: 0 auto;
    }

    /* Intro Block */
    .intro-block {
        background-color: var(--surface);
        border-left: 4px solid var(--accent);
        padding: 24px;
        margin-bottom: 40px;
        font-size: 16px;
        color: var(--text);
        box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }

    /* Data Panels (Sections) */
    .data-panel {
        margin-bottom: 40px;
        background: rgba(18, 32, 48, 0.4);
        border: 1px solid var(--border);
        padding: 24px;
        border-radius: var(--radius);
    }
    .data-panel h2 {
        font-size: 22px;
        color: var(--accent2);
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 10px;
        border-bottom: 1px solid var(--border);
        padding-bottom: 10px;
    }
    .data-panel h2::before {
        content: '■';
        color: var(--accent);
        font-size: 14px;
    }
    .data-panel p {
        margin-bottom: 16px;
        color: var(--muted);
    }
    .data-panel p:last-child { margin-bottom: 0; }
    .data-panel a {
        color: var(--accent2);
        border-bottom: 1px dashed var(--accent2);
    }
    .data-panel a:hover { color: var(--accent); border-bottom-color: var(--accent); }

    /* Terminal Lists */
    .terminal-list {
        margin-top: 16px;
        background: var(--bg);
        padding: 16px;
        border: 1px solid var(--border);
    }
    .terminal-list li {
        position: relative;
        padding-left: 24px;
        margin-bottom: 12px;
        color: var(--text);
        font-size: 15px;
    }
    .terminal-list li:last-child { margin-bottom: 0; }
    .terminal-list li::before {
        content: '>';
        position: absolute;
        left: 0;
        top: 0;
        color: var(--accent);
        font-family: var(--font-display);
        font-weight: bold;
    }

    /* FAQ Section */
    .faq-section {
        margin-top: 60px;
    }
    .faq-section h2 {
        font-size: 24px;
        margin-bottom: 24px;
        text-align: center;
        color: #fff;
    }
    details {
        background-color: var(--surface);
        border: 1px solid var(--border);
        margin-bottom: 10px;
        border-radius: var(--radius);
    }
    summary {
        padding: 16px 20px;
        font-family: var(--font-display);
        font-size: 16px;
        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(--accent2);
        font-size: 20px;
    }
    details[open] summary::after { content: '-'; color: var(--accent); }
    details[open] summary { border-bottom: 1px solid var(--border); }
    details p {
        padding: 20px;
        color: var(--muted);
        background: rgba(7, 13, 18, 0.5);
    }

    /* Related Pages Block */
    .related-nav {
        margin-top: 60px;
        background: var(--surface);
        padding: 30px;
        border-top: 2px solid var(--accent2);
    }
    .nav-title {
        font-size: 14px;
        color: var(--muted);
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .nav-title::before, .nav-title::after {
        content: '';
        height: 1px;
        flex-grow: 1;
        background: var(--border);
    }
    .nav-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .nav-card {
        background: var(--bg);
        border: 1px solid var(--border);
        padding: 16px;
        display: flex;
        align-items: center;
        gap: 12px;
        font-family: var(--font-display);
        text-transform: uppercase;
        color: var(--text);
    }
    .nav-card::before {
        content: '⮞';
        color: var(--accent);
    }
    .nav-card:hover {
        border-color: var(--accent2);
        background: var(--surface-light);
        color: var(--accent2);
    }

    /* CTA Block */
    .cta-block {
        margin-top: 60px;
        margin-bottom: 60px;
        background: linear-gradient(135deg, var(--surface) 0%, var(--surface-light) 100%);
        padding: 40px 20px;
        text-align: center;
        border: 1px solid var(--accent);
        position: relative;
    }
    .cta-block::before {
        content: '';
        position: absolute;
        top: 0; left: 0; width: 30px; height: 30px;
        border-top: 3px solid var(--accent);
        border-left: 3px solid var(--accent);
    }
    .cta-block::after {
        content: '';
        position: absolute;
        bottom: 0; right: 0; width: 30px; height: 30px;
        border-bottom: 3px solid var(--accent);
        border-right: 3px solid var(--accent);
    }
    .cta-block h2 {
        font-size: 28px;
        color: #fff;
        margin-bottom: 16px;
    }
    .cta-block p {
        color: var(--muted);
        margin-bottom: 24px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    .cta-actions {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .cta-actions .btn {
        min-width: 160px;
        font-size: 16px;
    }

    /* FOOTER STYLES (Targeting Part A2) */
    footer {
        background-color: var(--surface);
        padding: 60px 0 30px;
        border-top: 1px solid var(--border);
        text-align: center;
    }
    .footer-brand {
        font-size: 32px;
        color: var(--accent);
        margin-bottom: 16px;
    }
    .footer-tagline {
        color: var(--muted);
        margin-bottom: 30px;
        font-size: 14px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    .footer-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px 24px;
        margin-bottom: 40px;
    }
    .footer-links a {
        color: var(--text);
        font-size: 14px;
    }
    .footer-links a:hover { color: var(--accent2); }
    .copyright {
        color: var(--muted);
        font-size: 12px;
        border-top: 1px solid var(--border);
        padding-top: 20px;
    }

    /* Breakpoints */
    @media (min-width: 768px) {
        .hero h1 { font-size: 42px; }
        .nav-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (min-width: 1024px) {
        .hero { padding: 60px 0; }
        .hero h1 { font-size: 48px; }
    }


/* 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; }