:root {
    --bg: #070d12;
    --surface: #122030;
    --surface-alt: #16283b;
    --accent: #f97316;
    --accent-hover: #ea580c;
    --accent2: #38bdf8;
    --text: #f0f8ff;
    --text-muted: #8fa5b8;
    --border: #2a3f54;
    --font-display: 'Oswald', sans-serif;
    --font-body: 'Fira Sans', sans-serif;
    --radius-sm: 2px;
    --radius-md: 4px;
    --transition: all 0.2s ease-in-out;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  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 { 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: 1.2; }

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

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 20px; font-family: var(--font-display); text-transform: uppercase;
    letter-spacing: 0.5px; font-size: 14px; cursor: pointer; transition: var(--transition);
    border-radius: var(--radius-sm); min-height: 44px; text-decoration: none;
  }
  .btn-primary {
    background-color: var(--accent); color: #000; border: 1px solid var(--accent);
    font-weight: 700;
  }
  .btn-primary:hover {
    background-color: var(--accent-hover); border-color: var(--accent-hover);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.3); color: #000;
  }
  .btn-secondary {
    background-color: transparent; color: var(--accent2); border: 1px solid var(--border);
  }
  .btn-secondary:hover {
    border-color: var(--accent2); background-color: rgba(56, 189, 248, 0.05);
  }

  /* Header (A1) */
  header {
    background-color: rgba(7, 13, 18, 0.95); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100; backdrop-filter: blur(10px);
  }
  .nav-container {
    display: flex; justify-content: space-between; align-items: center; height: 70px;
  }
  .brand {
    font-family: var(--font-display); font-size: 24px; font-weight: 700;
    color: var(--accent); text-transform: uppercase; letter-spacing: 1px;
    display: flex; align-items: center; gap: 8px;
  }
  .nav-links { display: none; gap: 24px; }
  .nav-links a {
    color: var(--text); font-family: var(--font-display); text-transform: uppercase;
    font-size: 14px; letter-spacing: 0.5px;
  }
  .nav-links a:hover { color: var(--accent); }
  .nav-actions { display: none; gap: 12px; }
  .menu-toggle {
    background: none; border: none; color: var(--text); font-size: 24px;
    cursor: pointer; display: block; padding: 10px;
  }
  .mobile-menu {
    display: none; flex-direction: column; background-color: var(--surface);
    position: absolute; top: 70px; left: 0; right: 0; border-bottom: 1px solid var(--border);
    padding: 10px 20px 20px;
  }
  .mobile-menu.active { display: flex; }
  .mobile-menu a {
    padding: 12px 0; border-bottom: 1px solid var(--border); color: var(--text);
    font-family: var(--font-display); text-transform: uppercase; font-size: 14px;
  }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu .btn { margin-top: 15px; text-align: center; justify-content: center; }

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

  /* Hero Banner */
  .hero {
    padding: 60px 0 40px;
    background: linear-gradient(180deg, rgba(18,32,48,0.4) 0%, var(--bg) 100%),
                radial-gradient(circle at top right, rgba(249,115,22,0.05) 0%, transparent 50%);
    border-bottom: 1px solid var(--border);
    position: relative;
  }
  .hero::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-image: linear-gradient(var(--border) 1px, transparent 1px),
                      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px; opacity: 0.1; z-index: -1;
  }
  .breadcrumb {
    font-size: 12px; color: var(--text-muted); text-transform: uppercase;
    letter-spacing: 1px; margin-bottom: 24px; font-family: var(--font-display);
    display: inline-block; padding: 4px 12px; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
  }
  .hero h1 {
    font-size: clamp(32px, 5vw, 48px); color: var(--text); margin-bottom: 24px;
    text-transform: uppercase; letter-spacing: 1px; max-width: 900px;
  }
  .meta-chips { display: flex; gap: 12px; flex-wrap: wrap; }
  .chip {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(56, 189, 248, 0.1); border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--accent2); padding: 6px 12px; font-size: 12px; font-family: var(--font-display);
    text-transform: uppercase; letter-spacing: 0.5px; border-radius: var(--radius-sm);
  }

  /* Main Content Layout */
  .content-wrapper { padding: 40px 0 80px; }

  /* Intro Block */
  .intro-block {
    background: var(--surface); padding: 30px; border-left: 4px solid var(--accent);
    margin-bottom: 40px; border-radius: 0 var(--radius-md) var(--radius-md) 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  }
  .intro-block p { font-size: 18px; color: var(--text); font-weight: 500; }

  /* Sections */
  .section-block { margin-bottom: 60px; }
  .section-block h2 {
    font-size: 28px; margin-bottom: 24px; color: var(--accent2);
    display: flex; align-items: center; gap: 12px;
  }
  .section-block h2::before {
    content: '>'; color: var(--accent); font-weight: 700; font-size: 24px;
  }
  .section-block p { margin-bottom: 20px; font-size: 16px; color: #d1d5db; }

  /* Terminal Lists */
  .data-list {
    list-style: none; margin: 24px 0; padding: 0;
    display: grid; gap: 12px;
  }
  .data-list li {
    background: var(--surface); border: 1px solid var(--border);
    padding: 16px 20px; display: flex; align-items: flex-start; gap: 12px;
    border-radius: var(--radius-sm); transition: var(--transition);
  }
  .data-list li:hover { border-color: var(--text-muted); background: var(--surface-alt); }
  .data-list li::before {
    content: '[+]'; color: var(--accent); font-family: var(--font-display);
    font-size: 14px; margin-top: 2px; flex-shrink: 0;
  }

  /* Alternate List Style for variety */
  .grid-list {
    display: grid; grid-template-columns: 1fr; gap: 16px; margin: 24px 0;
    list-style: none;
  }
  @media (min-width: 768px) { .grid-list { grid-template-columns: 1fr 1fr; } }
  .grid-list li {
    background: rgba(18, 32, 48, 0.5); border-top: 2px solid var(--border);
    padding: 16px; font-size: 15px; color: #d1d5db;
  }
  .grid-list li::before {
    content: 'SYS_MSG:'; display: block; font-family: var(--font-display);
    color: var(--text-muted); font-size: 12px; margin-bottom: 8px; letter-spacing: 1px;
  }

  /* FAQ Accordion */
  .faq-section { margin-bottom: 60px; }
  .faq-section h2 { font-size: 28px; margin-bottom: 30px; color: var(--text); border-bottom: 1px solid var(--border); padding-bottom: 10px; }
  details {
    background: var(--surface); border: 1px solid var(--border);
    margin-bottom: 12px; border-radius: var(--radius-sm);
  }
  summary {
    padding: 20px; font-family: var(--font-display); font-size: 18px;
    cursor: pointer; list-style: none; display: flex; justify-content: space-between;
    align-items: center; color: var(--text);
  }
  summary::-webkit-details-marker { display: none; }
  summary::after {
    content: '+'; color: var(--accent); font-size: 24px; font-weight: 700;
    transition: transform 0.3s ease;
  }
  details[open] summary::after { transform: rotate(45deg); }
  details[open] summary { border-bottom: 1px solid var(--border); color: var(--accent2); }
  details p { padding: 20px; color: #d1d5db; margin: 0; }

  /* Related Pages */
  .related-pages { margin-bottom: 60px; padding: 40px; background: var(--surface-alt); border-radius: var(--radius-md); border: 1px solid var(--border); }
  .related-pages h2 { font-size: 24px; margin-bottom: 24px; text-transform: uppercase; font-family: var(--font-display); text-align: center; }
  .nav-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
  @media (min-width: 768px) { .nav-grid { grid-template-columns: repeat(3, 1fr); } }
  .nav-card {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px; background: var(--bg); border: 1px solid var(--border);
    color: var(--text); font-family: var(--font-display); text-transform: uppercase;
    letter-spacing: 1px; border-radius: var(--radius-sm);
  }
  .nav-card:hover { border-color: var(--accent); color: var(--accent); box-shadow: inset 0 0 10px rgba(249,115,22,0.1); }
  .nav-card .arrow { color: var(--accent2); font-size: 18px; }

  /* CTA Block */
  .cta-block {
    background: linear-gradient(135deg, var(--surface) 0%, #0a131c 100%);
    border: 1px solid var(--accent); padding: 50px 30px; text-align: center;
    border-radius: var(--radius-md); position: relative; overflow: hidden;
  }
  .cta-block::after {
    content: ''; position: absolute; top: 0; right: 0; width: 100px; height: 100px;
    background: radial-gradient(circle, rgba(249,115,22,0.2) 0%, transparent 70%);
  }
  .cta-block h2 { font-size: 32px; color: var(--text); margin-bottom: 16px; text-transform: uppercase; }
  .cta-block p { font-size: 18px; color: var(--text-muted); margin-bottom: 30px; max-width: 600px; margin-inline: auto; }
  .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
  .cta-actions .btn { min-width: 160px; }

  /* Footer (A2) */
  footer {
    background-color: #04080b; border-top: 1px solid var(--border);
    padding: 60px 0 30px; margin-top: auto;
  }
  .footer-brand {
    font-family: var(--font-display); font-size: 32px; font-weight: 700;
    color: var(--accent); text-transform: uppercase; letter-spacing: 2px;
    margin-bottom: 16px;
  }
  .footer-tagline { color: var(--text-muted); margin-bottom: 30px; max-width: 400px; }
  .footer-links {
    display: flex; flex-wrap: wrap; gap: 16px 24px; margin-bottom: 40px;
  }
  .footer-links a {
    color: var(--text); font-size: 14px; text-decoration: none;
  }
  .footer-links a:hover { color: var(--accent); }
  .copyright {
    color: var(--text-muted); font-size: 14px; border-top: 1px solid var(--border);
    padding-top: 20px;
  }

  /* Inline Link Style inside body text */
  .section-block p a {
    color: var(--accent2); border-bottom: 1px dashed var(--accent2);
    font-weight: 500; padding-bottom: 2px;
  }
  .section-block p a:hover {
    color: var(--accent); border-bottom-color: var(--accent);
  }


/* 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; }