:root {
    --bg-dark: #0a1118;
    --surface: #142230;
    --surface-hover: #1c2f42;
    --accent-blue: #4dd0ff;
    --accent-blue-hover: #2bbfff;
    --accent-yellow: #ffd166;
    --accent-yellow-hover: #ffc233;
    --text-light: #f0faff;
    --text-muted: #8fa8b8;
    --font-display: 'Russo One', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --border-radius: 12px;
    --transition: all 0.3s ease;
  }

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

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

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

  a:hover {
    color: var(--accent-yellow);
  }

  h1, h2, h3, h4 {
    font-family: var(--font-display);
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: normal;
    letter-spacing: 0.5px;
  }

  .container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
  }

  /* BUTTONS */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-family: var(--font-display);
    font-size: 14px;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
  }

  .btn-primary {
    background-color: var(--accent-blue);
    color: var(--bg-dark);
    box-shadow: 0 4px 15px rgba(77, 208, 255, 0.3);
  }

  .btn-primary:hover {
    background-color: var(--accent-blue-hover);
    color: var(--bg-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(77, 208, 255, 0.4);
  }

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

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

  /* HEADER (Matched to Homepage Family) */
  header {
    background-color: rgba(10, 17, 24, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(77, 208, 255, 0.1);
  }

  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
  }

  .logo {
    font-family: var(--font-display);
    font-size: 28px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
  }

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

  .nav-links {
    display: none;
    gap: 20px;
  }

  .nav-links a {
    color: var(--text-light);
    font-size: 15px;
    font-weight: 600;
  }

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

  .header-ctas {
    display: none;
    gap: 12px;
  }

  .mobile-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--accent-blue);
    font-size: 28px;
    cursor: pointer;
  }

  .mobile-menu {
    display: none;
    flex-direction: column;
    background-color: var(--surface);
    padding: 20px;
    border-bottom: 1px solid rgba(77, 208, 255, 0.1);
  }

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

  .mobile-menu a {
    padding: 12px 0;
    color: var(--text-light);
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .mobile-menu .header-ctas {
    display: flex;
    flex-direction: column;
    margin-top: 20px;
  }

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

  /* HERO BANNER - KITE SKY MOTIF */
  .hero-banner {
    position: relative;
    padding: 60px 20px;
    text-align: center;
    background: radial-gradient(circle at top right, rgba(77, 208, 255, 0.15), transparent 50%),
                radial-gradient(circle at bottom left, rgba(255, 209, 102, 0.1), transparent 50%);
    border-bottom: 1px dashed rgba(77, 208, 255, 0.2);
    overflow: hidden;
  }

  /* Kite string decorative elements */
  .hero-banner::before {
    content: '';
    position: absolute;
    top: 0; left: 10%;
    width: 1px; height: 100%;
    background: repeating-linear-gradient(to bottom, rgba(255,255,255,0.1) 0, rgba(255,255,255,0.1) 10px, transparent 10px, transparent 20px);
    transform: rotate(15deg);
    z-index: 0;
  }
  .hero-banner::after {
    content: '';
    position: absolute;
    top: -20px; right: 15%;
    width: 20px; height: 20px;
    background: var(--accent-yellow);
    transform: rotate(45deg);
    z-index: 0;
    box-shadow: 0 0 20px rgba(255, 209, 102, 0.5);
  }

  .hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
  }

  .breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
    display: inline-block;
    background: rgba(20, 34, 48, 0.6);
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
  }

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

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

  .hero-banner h1 {
    font-size: clamp(28px, 5vw, 42px);
    color: var(--text-light);
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
  }

  .meta-chips {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
  }

  .chip {
    background-color: var(--surface);
    color: var(--accent-blue);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 30px;
    border: 1px solid rgba(77, 208, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  /* MAIN CONTENT AREA */
  .main-content {
    padding: 50px 0;
  }

  .content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 860px;
    margin: 0 auto;
  }

  /* INTRO BLOCKQUOTE */
  .intro-block {
    background: linear-gradient(135deg, var(--surface) 0%, rgba(20, 34, 48, 0.5) 100%);
    border-left: 4px solid var(--accent-yellow);
    padding: 30px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-light);
    position: relative;
  }

  .intro-block::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-family: var(--font-display);
    font-size: 60px;
    color: rgba(255, 209, 102, 0.1);
    line-height: 1;
  }

  /* SECTION STYLING */
  .text-section {
    background-color: var(--surface);
    padding: 35px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.03);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
  }

  .text-section::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 100px; height: 100px;
    background: radial-gradient(circle, rgba(77,208,255,0.05) 0%, transparent 70%);
    pointer-events: none;
  }

  .text-section h2 {
    color: var(--accent-blue);
    font-size: 24px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .text-section h2::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    background-color: var(--accent-yellow);
    transform: rotate(45deg);
  }

  .text-section p {
    margin-bottom: 16px;
    color: #d0e3f0;
  }

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

  /* CUSTOM LIST (Kite Theme) */
  .custom-list {
    list-style: none;
    margin-top: 20px;
  }

  .custom-list li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 15px;
    color: #d0e3f0;
  }

  .custom-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--accent-blue);
    transform: rotate(45deg);
    box-shadow: 0 0 8px rgba(77, 208, 255, 0.6);
  }

  /* FAQ SECTION */
  .faq-section {
    margin-top: 20px;
  }

  .faq-section h2 {
    text-align: center;
    color: var(--accent-yellow);
    font-size: 28px;
    margin-bottom: 30px;
  }

  details {
    background-color: var(--surface);
    border: 1px solid rgba(77, 208, 255, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
  }

  details[open] {
    border-color: var(--accent-blue);
    box-shadow: 0 4px 15px rgba(77, 208, 255, 0.1);
  }

  summary {
    padding: 20px;
    font-family: var(--font-display);
    font-size: 16px;
    color: var(--text-light);
    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-yellow);
    font-size: 24px;
    line-height: 1;
    transition: transform 0.3s;
  }

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

  details p {
    padding: 0 20px 20px;
    color: var(--text-muted);
    border-top: 1px dashed rgba(255,255,255,0.05);
    margin-top: 10px;
    padding-top: 20px;
  }

  /* RELATED PAGES - KITE TAIL NODES */
  .related-pages {
    background: rgba(20, 34, 48, 0.4);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(255, 209, 102, 0.1);
  }

  .related-pages h3 {
    color: var(--text-light);
    margin-bottom: 25px;
    font-size: 20px;
  }

  .related-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }

  .related-grid a {
    display: inline-block;
    background-color: var(--surface);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    border: 1px solid rgba(77, 208, 255, 0.15);
    position: relative;
  }

  .related-grid a:hover {
    background-color: var(--accent-blue);
    color: var(--bg-dark);
    transform: translateY(-3px);
  }

  /* FINAL CTA */
  .final-cta {
    background: linear-gradient(135deg, var(--accent-blue) 0%, #1a8bbd 100%);
    padding: 50px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    color: var(--bg-dark);
    position: relative;
    overflow: hidden;
  }

  .final-cta::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255,255,255,0.1) 20px, rgba(255,255,255,0.1) 40px);
    opacity: 0.5;
    pointer-events: none;
  }

  .final-cta h3 {
    font-size: 32px;
    margin-bottom: 15px;
    color: var(--bg-dark);
    position: relative;
    z-index: 1;
  }

  .final-cta p {
    font-size: 16px;
    margin-bottom: 30px;
    font-weight: 600;
    position: relative;
    z-index: 1;
  }

  .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    position: relative;
    z-index: 1;
  }

  .cta-buttons .btn-primary {
    background-color: var(--bg-dark);
    color: var(--accent-blue);
  }
  .cta-buttons .btn-primary:hover {
    background-color: var(--surface);
    color: var(--accent-yellow);
  }

  .cta-buttons .btn-secondary {
    border-color: var(--bg-dark);
    color: var(--bg-dark);
  }
  .cta-buttons .btn-secondary:hover {
    background-color: var(--bg-dark);
    color: var(--accent-blue);
  }

  /* FOOTER (Matched to Homepage Family) */
  footer {
    background-color: var(--surface);
    padding: 60px 0 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 40px;
  }

  .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 {
    font-family: var(--font-display);
    font-size: 32px;
    color: var(--text-light);
    margin-bottom: 15px;
  }

  .footer-brand span {
    color: var(--accent-blue);
  }

  .footer-tagline {
    color: var(--text-muted);
    font-size: 14px;
    max-width: 300px;
  }

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
  }

  .footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    width: calc(50% - 15px);
  }

  @media (min-width: 768px) {
    .footer-links a {
      width: calc(33.333% - 15px);
    }
  }

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

  .footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 14px;
  }

  /* RESPONSIVE ADJUSTMENTS */
  @media (max-width: 767px) {
    .hero-banner h1 {
      font-size: 26px;
    }
    .text-section {
      padding: 25px 20px;
    }
    .intro-block {
      padding: 20px;
      font-size: 16px;
    }
    .cta-buttons {
      flex-direction: column;
    }
    .btn {
      width: 100%;
    }
  }

  /* Touch target size for mobile */
  @media (max-width: 1024px) {
      a, button, summary {
          min-height: 44px;
      }
      .nav-links a, .footer-links a {
          display: inline-flex;
          align-items: center;
      }
  }


/* 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; }