:root {
    --bg: #140505;
    --surface: #260d0d;
    --surface-light: #3a1414;
    --accent: #ff6b00;
    --accent2: #ffd700;
    --text: #fff5f0;
    --muted: #c28888;
    --font-display: 'Oswald', sans-serif;
    --font-body: 'Fira Sans', sans-serif;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3, .font-display {
    font-family: var(--font-display);
    text-transform: uppercase;
    margin-top: 0;
  }

  a {
    color: var(--accent2);
    text-decoration: none;
    transition: color 0.2s ease;
  }

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

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

  /* --- HEADER STYLES --- */
  header {
    background-color: var(--surface);
    border-bottom: 3px solid var(--accent);
    position: sticky;
    top: 0;
    z-index: 1000;
  }

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

  .logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
  }

  .menu-toggle {
    background: none;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 1.5rem;
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 4px;
    display: block;
  }

  header nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--surface);
    border-bottom: 3px solid var(--accent);
    padding: 20px 0;
  }

  header nav.active { display: block; }

  header nav ul {
    list-style: none;
    margin: 0;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  header nav a {
    color: var(--text);
    font-family: var(--font-display);
    font-size: 1.1rem;
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--surface-light);
  }

  header nav a:hover { color: var(--accent); border-bottom-color: var(--accent); }

  @media (min-width: 1024px) {
    .menu-toggle { display: none; }
    header nav {
      display: block;
      position: static;
      width: auto;
      border: none;
      padding: 0;
    }
    header nav ul {
      flex-direction: row;
      padding: 0;
      gap: 25px;
    }
    header nav a {
      border: none;
      padding: 5px 0;
      position: relative;
    }
    header nav a::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.3s;
    }
    header nav a:hover::after { width: 100%; }
  }

  /* --- HERO BANNER --- */
  .hero {
    background: linear-gradient(to bottom, rgba(38, 13, 13, 0.9), rgba(20, 5, 5, 1)),
                repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255, 107, 0, 0.03) 10px, rgba(255, 107, 0, 0.03) 20px);
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid var(--surface-light);
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,107,0,0.1) 0%, transparent 60%);
    z-index: 0;
    pointer-events: none;
  }

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

  .breadcrumb {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 20px;
    display: inline-block;
    background: var(--surface);
    padding: 5px 15px;
    border-radius: 20px;
    border: 1px solid var(--surface-light);
  }

  .hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--text);
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    letter-spacing: 1px;
  }

  .hero h1::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 15px auto 0;
  }

  .meta-chips {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
  }

  .chip {
    background: var(--surface-light);
    color: var(--accent2);
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    border-left: 2px solid var(--accent);
  }

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

  .intro-block {
    background: var(--surface);
    border: 1px solid var(--surface-light);
    border-left: 5px solid var(--accent);
    padding: 30px;
    font-size: 1.15rem;
    margin-bottom: 50px;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    position: relative;
  }

  .intro-block::before {
    content: '"';
    position: absolute;
    top: -10px;
    right: 20px;
    font-family: var(--font-display);
    font-size: 5rem;
    color: var(--surface-light);
    line-height: 1;
  }

  .content-section {
    margin-bottom: 60px;
    background: rgba(38, 13, 13, 0.3);
    padding: 30px;
    border-radius: 8px;
    border-top: 1px solid var(--surface-light);
  }

  .content-section h2 {
    color: var(--accent);
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px dashed var(--muted);
    padding-bottom: 15px;
  }

  .content-section h2::before {
    counter-increment: section-counter;
    content: "0" counter(section-counter);
    background: var(--accent);
    color: var(--bg);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 1.2rem;
    font-weight: 700;
  }

  .content-section p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: #e8d5d5;
  }

  /* Visual Checklist */
  .mechanic-list {
    list-style: none;
    padding: 0;
    margin: 30px 0;
    background: var(--surface);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--surface-light);
  }

  .mechanic-list li {
    position: relative;
    padding-left: 40px;
    margin-bottom: 15px;
    font-size: 1.05rem;
  }

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

  .mechanic-list li::before {
    content: '⚙';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent);
    font-size: 1.4rem;
    line-height: 1.2;
  }

  /* In-text links styling */
  .content-section p a {
    color: var(--accent2);
    border-bottom: 1px dotted var(--accent2);
    font-weight: 500;
  }
  .content-section p a:hover {
    color: var(--accent);
    border-bottom-style: solid;
  }

  /* --- FAQ SECTION --- */
  .faq-section {
    margin-top: 60px;
  }

  .faq-section h2 {
    text-align: center;
    color: var(--text);
    font-size: 2.5rem;
    margin-bottom: 30px;
  }

  .faq-section h2 span { color: var(--accent); }

  .faq-item {
    background: var(--surface);
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid var(--surface-light);
    overflow: hidden;
  }

  .faq-item summary {
    padding: 20px;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent2);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0,0,0,0.2);
  }

  .faq-item summary::-webkit-details-marker { display: none; }

  .faq-item summary::after {
    content: '▼';
    color: var(--accent);
    font-size: 1rem;
    transition: transform 0.3s;
  }

  .faq-item[open] summary::after { transform: rotate(180deg); }

  .faq-item p {
    padding: 20px;
    margin: 0;
    border-top: 1px solid var(--surface-light);
    color: #e8d5d5;
  }

  /* --- RELATED LINKS SECTION --- */
  .related-section {
    margin: 60px 0;
    padding: 40px;
    background: var(--surface);
    border-radius: 8px;
    text-align: center;
  }

  .related-section h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--muted);
  }

  .related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
  }

  .related-link {
    display: block;
    padding: 15px;
    background: var(--bg);
    border: 1px solid var(--surface-light);
    color: var(--text);
    font-family: var(--font-display);
    text-transform: uppercase;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }

  .related-link::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,107,0,0.2), transparent);
    transition: left 0.5s;
  }

  .related-link:hover {
    background: var(--surface-light);
    border-color: var(--accent);
    color: var(--accent2);
  }

  .related-link:hover::before { left: 100%; }

  /* --- GRAND CTA --- */
  .grand-cta {
    background: linear-gradient(135deg, #3a0a0a 0%, var(--surface) 100%);
    border: 2px solid var(--accent);
    border-radius: 12px;
    padding: 50px 30px;
    text-align: center;
    margin: 60px 0;
    box-shadow: 0 0 40px rgba(255, 107, 0, 0.15);
  }

  .grand-cta h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--text);
    margin-bottom: 15px;
  }

  .grand-cta p {
    font-size: 1.2rem;
    color: var(--muted);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 40px;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 4px;
    cursor: pointer;
    min-width: 200px;
    min-height: 44px;
    transition: transform 0.2s, box-shadow 0.2s;
  }

  .btn-primary {
    background: var(--accent);
    color: #000;
    border: none;
    box-shadow: 0 4px 15px rgba(255, 107, 0, 0.4);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 0, 0.6);
    color: #000;
  }

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

  .btn-secondary:hover {
    background: rgba(255, 215, 0, 0.1);
    transform: translateY(-2px);
    color: var(--accent2);
  }

  /* --- FOOTER STYLES --- */
  footer {
    background-color: var(--surface);
    border-top: 3px solid var(--accent);
    padding: 50px 0 20px;
    font-size: 0.95rem;
  }

  .footer-top {
    text-align: center;
    margin-bottom: 40px;
  }

  .footer-brand {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 10px;
  }

  .footer-tagline { color: var(--muted); }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
  }

  .footer-links div {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-links a {
    color: var(--text);
    padding-left: 10px;
    border-left: 2px solid transparent;
  }

  .footer-links a:hover {
    color: var(--accent2);
    border-left-color: var(--accent);
  }

  .footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--surface-light);
    color: var(--muted);
    font-size: 0.85rem;
  }

  /* Breakpoints */
  @media (max-width: 767px) {
    .cta-buttons { flex-direction: column; }
    .btn { width: 100%; }
    .content-section { padding: 20px 15px; }
    .intro-block { padding: 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; }