:root {
    --bg: #0a1118;
    --surface: #142230;
    --surface-hover: #1c2e40;
    --accent: #4dd0ff;
    --accent-hover: #2bbfff;
    --accent2: #ffd166;
    --text: #f0faff;
    --muted: #8fa8b8;
    --font-display: 'Russo One', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
  }

  * {
    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: var(--transition);
  }

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

  h1, h2, h3, .logo, .footer-brand {
    font-family: var(--font-display);
    font-weight: normal;
    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;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
  }

  .btn-primary {
    background-color: var(--accent2);
    color: #000;
  }

  .btn-primary:hover {
    background-color: #ffc233;
    transform: translateY(-2px);
  }

  .btn-secondary {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
  }

  .btn-secondary:hover {
    background-color: rgba(77, 208, 255, 0.1);
  }

  /* HEADER (Matched to provided HTML) */
  header {
    background-color: rgba(10, 17, 24, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(143, 168, 184, 0.2);
  }

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

  .logo {
    font-size: 24px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: lowercase;
  }

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

  .nav-links {
    display: none;
    gap: 24px;
  }

  .nav-links a {
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
  }

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

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

  .mobile-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--text);
    font-size: 24px;
    cursor: pointer;
  }

  .mobile-menu {
    display: none;
    background-color: var(--surface);
    padding: 20px;
    flex-direction: column;
    gap: 16px;
    border-bottom: 1px solid rgba(143, 168, 184, 0.2);
  }

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

  .mobile-menu a {
    color: var(--text);
    font-weight: 600;
    padding: 8px 0;
    border-bottom: 1px solid rgba(143, 168, 184, 0.1);
  }

  .mobile-menu .header-ctas {
    display: flex;
    flex-direction: column;
    margin-top: 10px;
  }

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

  /* HERO SECTION - BONUS PAGE SPECIFIC */
  .hero-bonus {
    position: relative;
    padding: 60px 0;
    background: linear-gradient(135deg, var(--surface) 0%, #0d161f 100%);
    border-bottom: 2px solid var(--accent);
    overflow: hidden;
  }

  .hero-bonus::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(77, 208, 255, 0.05) 0%, transparent 70%);
    z-index: 0;
  }

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

  .breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .hero-bonus h1 {
    font-size: clamp(32px, 5vw, 48px);
    color: var(--text);
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
  }

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

  .chip {
    background-color: rgba(143, 168, 184, 0.1);
    border: 1px solid rgba(143, 168, 184, 0.3);
    color: var(--muted);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
  }

  /* DECORATIVE KITES */
  .kite-decor {
    position: absolute;
    opacity: 0.15;
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    z-index: 0;
  }
  .kite-1 {
    width: 120px; height: 160px;
    background-color: var(--accent);
    top: 20px; right: 10%;
    transform: rotate(15deg);
  }
  .kite-2 {
    width: 80px; height: 110px;
    background-color: var(--accent2);
    bottom: 30px; right: 25%;
    transform: rotate(-10deg);
  }

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

  .content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
  }

  /* INTRO BLOCK */
  .intro-block {
    background-color: var(--surface);
    border-left: 4px solid var(--accent);
    padding: 24px 30px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 17px;
    color: var(--text);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }

  .intro-block p { margin: 0; }

  /* SECTION STYLES */
  .content-section h2 {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px dashed rgba(77, 208, 255, 0.3);
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .content-section h2::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    background-color: var(--accent2);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  }

  .content-section p {
    margin-bottom: 16px;
    color: #d1e4f0;
  }

  /* CUSTOM LIST */
  .custom-list {
    list-style: none;
    margin: 24px 0;
    padding: 0;
    background-color: rgba(20, 34, 48, 0.5);
    border-radius: var(--radius-md);
    padding: 20px;
  }

  .custom-list li {
    position: relative;
    padding-left: 36px;
    margin-bottom: 16px;
    color: var(--text);
  }

  .custom-list li:last-child { margin-bottom: 0; }

  .custom-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    background-color: rgba(255, 209, 102, 0.1);
    color: var(--accent2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
  }

  /* HIGHLIGHT CARDS */
  .highlight-card {
    background: linear-gradient(180deg, var(--surface) 0%, rgba(20,34,48,0.5) 100%);
    border: 1px solid rgba(143, 168, 184, 0.2);
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    overflow: hidden;
  }

  .highlight-card::after {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(77, 208, 255, 0.1) 0%, transparent 70%);
  }

  /* FAQ ACCORDION */
  .faq-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
  }

  details {
    background-color: var(--surface);
    border: 1px solid rgba(143, 168, 184, 0.2);
    border-radius: var(--radius-sm);
    overflow: hidden;
  }

  summary {
    padding: 18px 20px;
    font-weight: 700;
    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: 20px;
    transition: transform 0.3s;
  }

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

  details[open] summary {
    border-bottom: 1px solid rgba(143, 168, 184, 0.1);
  }

  details p {
    padding: 18px 20px;
    margin: 0;
    color: var(--muted);
    background-color: rgba(10, 17, 24, 0.3);
  }

  /* RELATED LINKS BLOCK */
  .related-nav {
    background-color: var(--surface);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: 20px;
    border-top: 3px solid var(--accent2);
  }

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

  .nav-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .nav-pills a {
    background-color: var(--bg);
    border: 1px solid rgba(143, 168, 184, 0.3);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    color: var(--muted);
  }

  .nav-pills a:hover {
    background-color: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
  }

  /* GRAND CTA */
  .grand-cta {
    background: linear-gradient(45deg, var(--surface) 0%, #1a2f45 100%);
    border-radius: var(--radius-lg);
    padding: 50px 30px;
    text-align: center;
    margin: 60px auto;
    max-width: 900px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  }

  .grand-cta::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(rgba(255, 209, 102, 0.1) 2px, transparent 2px);
    background-size: 30px 30px;
    opacity: 0.5;
  }

  .cta-content {
    position: relative;
    z-index: 1;
  }

  .grand-cta h2 {
    font-size: 32px;
    color: var(--text);
    margin-bottom: 16px;
    border: none;
    justify-content: center;
  }

  .grand-cta h2::before { display: none; }

  .grand-cta p {
    color: var(--muted);
    margin-bottom: 30px;
    font-size: 16px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
  }

  .cta-buttons .btn {
    padding: 14px 30px;
    font-size: 16px;
  }

  /* FOOTER (Matched to provided HTML) */
  footer {
    background-color: #05090d;
    padding: 60px 0 20px;
    border-top: 1px solid rgba(143, 168, 184, 0.1);
  }

  .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-size: 28px;
    color: var(--text);
    margin-bottom: 16px;
    text-transform: lowercase;
  }

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

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

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

  .footer-links a {
    color: var(--muted);
    font-size: 14px;
  }

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

  .footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(143, 168, 184, 0.1);
    color: var(--muted);
    font-size: 14px;
  }

  /* RESPONSIVE ADJUSTMENTS */
  @media (max-width: 768px) {
    .intro-block {
      padding: 20px;
      font-size: 15px;
      border-radius: var(--radius-md);
      border-left: none;
      border-top: 4px solid var(--accent);
    }
    .content-section h2 { font-size: 24px; }
    .cta-buttons { flex-direction: column; }
    .grand-cta { padding: 40px 20px; margin: 40px 20px; }
  }


/* 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; }