:root {
    --bg: #0a1118;
    --surface: #142230;
    --surface-hover: #1c2e42;
    --accent: #4dd0ff;
    --accent-hover: #3bc0f0;
    --accent2: #ffd166;
    --text: #f0faff;
    --muted: #8fa8b8;
    --font-heading: 'Russo One', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --radius: 12px;
    --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;
    overflow-x: hidden;
  }

  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-heading);
    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: 12px 24px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    min-height: 44px;
    border: none;
    transition: var(--transition);
  }
  .btn-primary {
    background-color: var(--accent2);
    color: #000;
  }
  .btn-primary:hover { background-color: #e6bc5c; transform: translateY(-2px); }
  .btn-secondary {
    background-color: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
  }
  .btn-secondary:hover { background-color: rgba(77, 208, 255, 0.1); transform: translateY(-2px); }

  /* HEADER (Verbatim CSS Support) */
  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; }
  .logo span { color: var(--accent); }
  .nav-links { display: none; gap: 20px; }
  .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 {
    background: none; border: none; color: var(--text); font-size: 28px; cursor: pointer;
    min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center;
  }
  .mobile-menu {
    display: none; flex-direction: column; background-color: var(--surface);
    position: absolute; top: 70px; left: 0; width: 100%; padding: 20px;
    border-bottom: 2px solid var(--accent);
  }
  .mobile-menu.active { display: flex; }
  .mobile-menu a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.05); color: var(--text); font-weight: 600; }
  .mobile-menu .header-ctas { display: flex; flex-direction: column; margin-top: 20px; gap: 10px; }
  .mobile-menu .header-ctas .btn { width: 100%; }

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

  /* HERO SECTION */
  .hero {
    position: relative;
    padding: 60px 0 40px;
    background: linear-gradient(135deg, var(--bg) 0%, var(--surface) 100%);
    overflow: hidden;
    text-align: center;
  }
  /* Decorative kite shapes */
  .hero::before, .hero::after {
    content: ''; position: absolute; opacity: 0.1;
  }
  .hero::before {
    width: 150px; height: 150px; background: var(--accent);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    top: -20px; left: -20px; transform: rotate(15deg);
  }
  .hero::after {
    width: 100px; height: 100px; background: var(--accent2);
    clip-path: polygon(50% 0%, 100% 30%, 50% 100%, 0% 30%);
    bottom: 20px; right: 10%; transform: rotate(-20deg);
  }
  .breadcrumb {
    font-size: 13px; color: var(--muted); margin-bottom: 20px;
    position: relative; z-index: 2;
  }
  .hero h1 {
    font-size: 32px; color: var(--text); margin-bottom: 16px;
    position: relative; z-index: 2; text-shadow: 0 4px 12px rgba(0,0,0,0.5);
  }
  .meta-chips {
    display: flex; justify-content: center; gap: 10px; flex-wrap: wrap;
    position: relative; z-index: 2;
  }
  .chip {
    background: rgba(77, 208, 255, 0.1); border: 1px solid rgba(77, 208, 255, 0.3);
    color: var(--accent); padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600;
  }

  /* MAIN CONTENT */
  .main-content { padding: 40px 0 60px; }

  .intro-box {
    background: var(--surface);
    border-left: 4px solid var(--accent);
    padding: 24px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 40px;
    font-size: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    position: relative;
  }
  .intro-box::before {
    content: '💡'; position: absolute; top: -15px; left: 15px;
    font-size: 24px; background: var(--bg); border-radius: 50%; padding: 4px;
  }

  .content-grid {
    display: grid; gap: 30px;
  }

  .content-section {
    background: var(--surface);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
  }

  /* Distinct styling for sections to avoid generic look */
  .sec-1 { border-top: 4px solid var(--accent); }
  .sec-2 { border-top: 4px solid var(--accent2); }
  .sec-3 { background: linear-gradient(180deg, var(--surface) 0%, rgba(20,34,48,0.5) 100%); }
  .sec-4 { position: relative; }
  .sec-4::after {
    content: ''; position: absolute; top: 0; right: 0; width: 100px; height: 100px;
    background: radial-gradient(circle, rgba(77,208,255,0.1) 0%, transparent 70%);
  }
  .sec-5 { border: 1px solid rgba(255, 209, 102, 0.3); }

  .content-section h2 {
    font-size: 22px; margin-bottom: 16px; color: var(--accent);
    display: flex; align-items: center; gap: 10px;
  }

  .badge-num {
    background: var(--bg); color: var(--text); width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 8px; font-size: 16px; border: 1px solid rgba(255,255,255,0.1);
  }

  .content-section p { margin-bottom: 16px; color: #d1e3f0; }
  .content-section p:last-child { margin-bottom: 0; }
  .content-section a { text-decoration: underline; text-decoration-color: rgba(77,208,255,0.4); text-underline-offset: 4px; }
  .content-section a:hover { text-decoration-color: var(--accent); }

  .custom-list {
    list-style: none; margin: 16px 0; padding-left: 10px;
  }
  .custom-list li {
    position: relative; padding-left: 28px; margin-bottom: 12px; color: #d1e3f0;
  }
  .custom-list li::before {
    content: ''; position: absolute; left: 0; top: 6px;
    width: 12px; height: 12px; background: var(--accent2);
    clip-path: polygon(50% 0%, 100% 30%, 50% 100%, 0% 30%); /* Kite bullet */
  }

  /* FAQ SECTION */
  .faq-container { margin-top: 60px; }
  .faq-container h2 {
    text-align: center; font-size: 28px; margin-bottom: 30px; color: var(--text);
  }
  .faq-item {
    background: var(--surface); margin-bottom: 16px; border-radius: var(--radius);
    overflow: hidden; border: 1px solid rgba(255,255,255,0.05);
  }
  .faq-item summary {
    padding: 20px; font-weight: 600; cursor: pointer; color: var(--text);
    display: flex; justify-content: space-between; align-items: center;
    list-style: none; min-height: 44px;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+'; font-size: 24px; color: var(--accent); transition: var(--transition);
  }
  .faq-item[open] summary::after { transform: rotate(45deg); color: var(--accent2); }
  .faq-item p {
    padding: 0 20px 20px; color: var(--muted); border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 10px; padding-top: 15px;
  }

  /* RELATED LINKS */
  .related-section { margin-top: 60px; text-align: center; }
  .related-section h2 { font-size: 24px; margin-bottom: 24px; }
  .related-grid {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  }
  .related-pill {
    background: rgba(20, 34, 48, 0.8); border: 1px solid rgba(143, 168, 184, 0.3);
    padding: 10px 20px; border-radius: 30px; font-size: 14px; font-weight: 600;
    color: var(--text); transition: var(--transition); min-height: 44px; display: inline-flex; align-items: center;
  }
  .related-pill:hover {
    background: var(--accent); color: #000; border-color: var(--accent); transform: translateY(-2px); text-decoration: none;
  }

  /* BOTTOM CTA */
  .bottom-cta {
    margin-top: 80px; text-align: center; padding: 60px 20px;
    background: linear-gradient(45deg, var(--surface) 0%, rgba(77,208,255,0.1) 100%);
    border-radius: var(--radius); border: 1px solid rgba(77,208,255,0.2);
    position: relative; overflow: hidden;
  }
  .bottom-cta h2 { font-size: 32px; margin-bottom: 16px; color: var(--accent2); }
  .bottom-cta p { font-size: 16px; color: #d1e3f0; margin-bottom: 30px; max-width: 600px; margin-left: auto; margin-right: auto; }
  .cta-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

  /* FOOTER (Verbatim CSS Support) */
  footer { background-color: #05090d; padding: 60px 0 20px; border-top: 1px solid rgba(255,255,255,0.05); margin-top: 60px; }
  .footer-grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; }
  .footer-brand { font-size: 28px; color: var(--text); margin-bottom: 16px; }
  .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; }
  .footer-links a { color: var(--muted); font-size: 14px; }
  .footer-links a:hover { color: var(--accent); padding-left: 4px; }
  .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.05); color: var(--muted); font-size: 14px; }

  @media (min-width: 768px) {
    .hero h1 { font-size: 42px; }
    .content-grid { grid-template-columns: 1fr 1fr; }
    .sec-1, .sec-5 { grid-column: 1 / -1; } /* Make some sections full width for variety */
    .footer-grid { grid-template-columns: 1fr 2fr; }
    .footer-links { grid-template-columns: repeat(3, 1fr); }
  }

  @media (min-width: 1024px) {
    .content-section { padding: 40px; }
    .intro-box { padding: 32px; font-size: 18px; }
  }


/* 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; }