:root {
    --bg: #081018;
    --surface: #122030;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --accent2: #fbbf24;
    --accent2-hover: #f59e0b;
    --text: #f0f6ff;
    --muted: #8fa0b8;
    --border: rgba(96, 165, 250, 0.2);
    --font-display: 'Anton', sans-serif;
    --font-body: 'Barlow', sans-serif;
    --header-height: 70px;
  }

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

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

  a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease, text-shadow 0.2s ease;
  }

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

  /* Typography */
  h1, h2, h3, .font-display {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.2;
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    border: none;
  }

  .btn-primary {
    background-color: var(--accent);
    color: var(--bg);
    box-shadow: 0 4px 14px rgba(96, 165, 250, 0.3);
  }

  .btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(96, 165, 250, 0.4);
  }

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

  .btn-secondary:hover {
    background-color: var(--accent2);
    color: var(--bg);
    transform: translateY(-2px);
  }

  /* Container */
  .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.25rem;
  }

  /* --- HEADER (Part A1 Styles) --- */
  header {
    background-color: rgba(8, 16, 24, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    height: var(--header-height);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
  }

  .logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--text);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

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

  .nav-links {
    display: none;
    gap: 1.5rem;
  }

  .nav-links a {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

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

  .header-ctas {
    display: none;
    gap: 1rem;
  }

  .mobile-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
  }

  .mobile-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  .mobile-menu.active {
    display: flex;
  }

  .mobile-menu a {
    color: var(--text);
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

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

  /* --- FOOTER (Part A2 Styles) --- */
  footer {
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
  }

  .footer-brand {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--text);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
  }

  .footer-tagline {
    color: var(--muted);
    max-width: 400px;
    margin-bottom: 2rem;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 3rem;
  }

  .footer-links a {
    color: var(--muted);
    font-size: 0.9rem;
  }

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

  .footer-copy {
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    text-align: center;
  }

  @media (min-width: 768px) {
    .footer-links { grid-template-columns: repeat(3, 1fr); }
  }
  @media (min-width: 1024px) {
    .footer-links { grid-template-columns: repeat(4, 1fr); }
  }

  /* --- INNER PAGE STYLES (Part B & C) --- */
  main {
    padding-top: var(--header-height);
  }

  /* Hero Banner */
  .hero {
    position: relative;
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--bg) 0%, var(--surface) 100%);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
  }

  /* Steel Grid Motif */
  .hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
      linear-gradient(rgba(96, 165, 250, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(96, 165, 250, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
    pointer-events: none;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
  }

  .breadcrumb {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(96, 165, 250, 0.1);
    border-radius: 20px;
    border: 1px solid var(--border);
  }

  .hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--text);
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 20px rgba(0,0,0,0.5);
  }

  .meta-chips {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
  }

  .chip {
    display: inline-flex;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bg);
    background-color: var(--accent2);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .chip-secondary {
    background-color: var(--surface);
    color: var(--muted);
    border: 1px solid var(--border);
  }

  /* Content Layout */
  .page-layout {
    padding: 4rem 0;
    max-width: 900px;
    margin: 0 auto;
  }

  .intro-block {
    font-size: 1.125rem;
    color: var(--text);
    border-left: 4px solid var(--accent);
    padding-left: 1.5rem;
    margin-bottom: 3rem;
    background: linear-gradient(90deg, rgba(96, 165, 250, 0.05) 0%, transparent 100%);
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
  }

  .content-section {
    margin-bottom: 3.5rem;
    background-color: var(--surface);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
  }

  .content-section h2 {
    font-size: 1.75rem;
    color: var(--accent);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .content-section h2::before {
    content: '';
    display: block;
    width: 24px;
    height: 4px;
    background-color: var(--accent2);
  }

  .content-section p {
    margin-bottom: 1.25rem;
    color: var(--muted);
  }

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

  .content-section a {
    font-weight: 600;
    border-bottom: 1px dashed var(--accent);
  }

  .content-section a:hover {
    border-bottom-style: solid;
  }

  /* Custom List */
  .feature-list {
    list-style: none;
    margin-top: 1.5rem;
    display: grid;
    gap: 1rem;
  }

  .feature-list li {
    position: relative;
    padding-left: 2rem;
    color: var(--text);
    background: rgba(8, 16, 24, 0.5);
    padding: 1rem 1rem 1rem 3rem;
    border-radius: 4px;
    border-left: 2px solid var(--accent);
  }

  .feature-list li::before {
    content: '→';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent2);
    font-weight: bold;
    font-family: var(--font-display);
  }

  @media (min-width: 768px) {
    .feature-list {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  /* FAQ Section */
  .faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  details {
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
  }

  summary {
    padding: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text);
    transition: background-color 0.2s ease;
  }

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

  summary::after {
    content: '+';
    font-family: var(--font-display);
    color: var(--accent);
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.3s ease;
  }

  details[open] summary {
    background-color: rgba(96, 165, 250, 0.05);
    border-bottom: 1px solid var(--border);
  }

  details[open] summary::after {
    transform: rotate(45deg);
    color: var(--accent2);
  }

  details p {
    padding: 1.25rem;
    color: var(--muted);
    margin: 0;
  }

  /* Related Pages Block */
  .related-nav {
    margin: 4rem 0;
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
  }

  .related-nav h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 1.5rem;
  }

  .related-links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .related-links-grid a {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: rgba(96, 165, 250, 0.1);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .related-links-grid a:hover {
    background-color: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.2);
  }

  /* CTA Block */
  .cta-mega {
    margin-top: 4rem;
    padding: 4rem 2rem;
    background: linear-gradient(45deg, var(--surface) 0%, rgba(96, 165, 250, 0.1) 100%);
    border: 1px solid var(--accent);
    border-radius: 8px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cta-mega::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.1) 0%, transparent 50%);
    pointer-events: none;
  }

  .cta-mega h2 {
    font-size: 2.5rem;
    color: var(--text);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
  }

  .cta-mega p {
    color: var(--muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
  }

  .cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
  }

  @media (max-width: 767px) {
    .content-section { padding: 1.5rem; }
    .hero { padding: 3rem 0; }
    .cta-mega { padding: 3rem 1.5rem; }
  }


/* 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; }