:root {
    --bg: #081018;
    --surface: #122030;
    --surface-light: #1a2f4c;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --accent2: #fbbf24;
    --text: #f0f6ff;
    --muted: #8fa0b8;
    --font-display: 'Anton', sans-serif;
    --font-body: 'Barlow', sans-serif;
    --border-color: rgba(143, 160, 184, 0.2);
  }

  * { 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;
  }

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

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

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    text-decoration: none;
  }
  .btn-primary { background: var(--accent); color: var(--bg); border: 2px solid var(--accent); }
  .btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--bg); }
  .btn-secondary { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
  .btn-secondary:hover { background: rgba(96, 165, 250, 0.1); }
  .btn-accent { background: var(--accent2); color: var(--bg); border: 2px solid var(--accent2); }
  .btn-accent:hover { background: #f59e0b; border-color: #f59e0b; color: var(--bg); }

  /* HEADER (Strict A1) */
  header { background: var(--surface); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
  .header-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
  .logo { font-family: var(--font-display); font-size: 2rem; color: var(--text); text-transform: uppercase; letter-spacing: 2px; display: flex; align-items: center; gap: 10px; }
  .nav-links { display: none; gap: 20px; }
  .nav-links a { color: var(--text); font-weight: 500; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.5px; }
  .nav-links a:hover { color: var(--accent); }
  .header-ctas { display: none; gap: 10px; }
  .header-ctas .btn { padding: 8px 16px; font-size: 0.9rem; min-height: 38px; }
  .mobile-toggle { background: none; border: none; color: var(--text); font-size: 1.8rem; cursor: pointer; padding: 5px; min-height: 44px; min-width: 44px; display: block; }
  .mobile-menu { display: none; background: var(--surface); padding: 20px; border-bottom: 1px solid var(--border-color); flex-direction: column; gap: 15px; }
  .mobile-menu.active { display: flex; }
  .mobile-menu a { color: var(--text); font-weight: 500; font-size: 1.1rem; padding: 10px 0; border-bottom: 1px solid var(--border-color); }
  .mobile-menu a:last-child { border-bottom: none; }

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

  /* FOOTER (Strict A2) */
  footer { background: var(--surface); padding: 60px 0 30px; border-top: 1px solid var(--border-color); margin-top: 60px; }
  .footer-brand { font-family: var(--font-display); font-size: 2.5rem; color: var(--text); text-transform: uppercase; letter-spacing: 2px; margin-bottom: 15px; }
  .footer-tagline { color: var(--muted); margin-bottom: 30px; max-width: 400px; }
  .footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; margin-bottom: 40px; }
  .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-color); padding-top: 20px; 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 UNIQUE DESIGN - STEEL ANCHOR MOTIF */

  /* Hero Banner */
  .hero-inner {
    background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
    padding: 60px 20px 40px;
    text-align: center;
    position: relative;
    border-bottom: 1px solid var(--surface-light);
  }

  .hero-inner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(circle at 50% 0%, rgba(96, 165, 250, 0.05) 0%, transparent 70%);
    pointer-events: none;
  }

  .breadcrumb {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 2;
  }

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

  h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    line-height: 1.1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    position: relative;
    z-index: 2;
  }

  .meta-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    position: relative;
    z-index: 2;
  }

  .chip {
    background: rgba(18, 32, 48, 0.8);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  .chip:nth-child(2) {
    border-color: var(--accent2);
    color: var(--accent2);
  }

  .intro-blockquote {
    max-width: 800px;
    margin: 0 auto;
    background: var(--surface);
    border-left: 4px solid var(--accent2);
    padding: 25px 30px;
    border-radius: 0 8px 8px 0;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #e2e8f0;
    text-align: left;
    position: relative;
    z-index: 2;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  }

  /* Main Content Area */
  .content-container {
    max-width: 840px;
    margin: 0 auto;
    padding: 40px 20px;
  }

  .content-container h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 3.5rem 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid var(--surface-light);
    padding-bottom: 10px;
  }

  /* Anchor Motif for H2 */
  .content-container h2::before {
    content: '⚓';
    font-size: 1.5rem;
    color: var(--muted);
    opacity: 0.5;
  }

  .content-container p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    color: #cbd5e1;
  }

  .content-container a {
    text-decoration: underline;
    text-decoration-color: rgba(96, 165, 250, 0.4);
    text-underline-offset: 4px;
    font-weight: 500;
  }
  .content-container a:hover {
    text-decoration-color: var(--accent);
  }

  /* Visual Checklist / Step List */
  .step-list {
    list-style: none;
    margin: 2.5rem 0;
    counter-reset: custom-counter;
  }

  .step-list li {
    position: relative;
    background: var(--surface);
    margin-bottom: 15px;
    padding: 20px 20px 20px 70px;
    border-radius: 8px;
    border: 1px solid var(--surface-light);
    font-size: 1.05rem;
    font-weight: 500;
    transition: transform 0.2s, border-color 0.2s;
  }

  .step-list li:hover {
    transform: translateX(5px);
    border-color: var(--accent);
  }

  .step-list li::before {
    counter-increment: custom-counter;
    content: counter(custom-counter);
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--surface-light);
    color: var(--accent);
    font-family: var(--font-display);
    font-size: 1.2rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    border: 1px solid rgba(96, 165, 250, 0.3);
  }

  /* Highlight Card (Section 3) */
  .highlight-card {
    background: linear-gradient(135deg, var(--surface) 0%, var(--surface-light) 100%);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid rgba(96, 165, 250, 0.2);
    margin: 3rem 0;
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
    position: relative;
    overflow: hidden;
  }

  .highlight-card::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px;
    width: 150px; height: 150px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
  }

  .highlight-card h2 {
    margin-top: 0;
    border-bottom: none;
    color: var(--accent);
  }
  .highlight-card h2::before { display: none; }
  .highlight-card p:last-child { margin-bottom: 0; }

  /* Tips Box (Section 6) */
  .tips-box {
    background: rgba(251, 191, 36, 0.05);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-left: 4px solid var(--accent2);
    padding: 30px;
    border-radius: 0 8px 8px 0;
    margin: 3rem 0;
  }

  .tips-box h2 {
    margin-top: 0;
    color: var(--accent2);
    border-bottom-color: rgba(251, 191, 36, 0.2);
  }
  .tips-box h2::before { content: '💡'; opacity: 1; filter: grayscale(1) sepia(1) hue-rotate(5deg) saturate(5); }
  .tips-box p:last-child { margin-bottom: 0; }

  /* FAQ Section */
  .faq-section {
    margin: 4rem 0;
  }

  .faq-section h2 {
    margin-bottom: 2rem;
  }

  details {
    background: var(--surface);
    border: 1px solid var(--surface-light);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s;
  }

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

  summary {
    padding: 20px;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--text);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,0.02);
    letter-spacing: 0.5px;
  }

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

  summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent);
    transition: transform 0.3s;
  }

  details[open] summary::after {
    content: '−';
    transform: rotate(180deg);
  }

  details p {
    padding: 0 20px 20px;
    margin: 0;
    color: #cbd5e1;
    border-top: 1px solid transparent;
  }
  details[open] p { border-top-color: rgba(255,255,255,0.05); padding-top: 20px; }

  /* Related Pages Nav */
  .related-nav {
    margin: 4rem 0;
    padding: 30px;
    background: var(--surface);
    border-radius: 12px;
    text-align: center;
  }

  .related-nav h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    text-transform: uppercase;
    margin-bottom: 20px;
    color: var(--muted);
  }

  .related-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .related-grid a {
    background: var(--bg);
    color: var(--text);
    padding: 10px 20px;
    border-radius: 6px;
    border: 1px solid var(--surface-light);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
  }

  .related-grid a:hover {
    background: var(--surface-light);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
  }

  /* Grand CTA */
  .grand-cta {
    background: linear-gradient(135deg, var(--surface-light) 0%, var(--surface) 100%);
    border: 1px solid var(--border-color);
    border-top: 4px solid var(--accent);
    border-radius: 16px;
    padding: 50px 30px;
    text-align: center;
    margin: 4rem 0 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    position: relative;
    overflow: hidden;
  }

  .grand-cta::after {
    content: '⚓';
    position: absolute;
    right: -20px;
    bottom: -40px;
    font-size: 150px;
    color: rgba(255,255,255,0.02);
    pointer-events: none;
    transform: rotate(-15deg);
  }

  .grand-cta h3 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
    color: var(--text);
  }

  .grand-cta p {
    font-size: 1.1rem;
    color: var(--muted);
    margin-bottom: 30px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    justify-content: center;
    position: relative;
    z-index: 2;
  }

  @media (min-width: 600px) {
    .cta-buttons { flex-direction: row; }
    .grand-cta { padding: 60px 40px; }
  }


/* 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; }