:root {
    --bg: #140505;
    --surface: #260d0d;
    --accent: #ff6b00;
    --accent-hover: #e55a00;
    --accent2: #ffd700;
    --text: #fff5f0;
    --muted: #c28888;
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Fira Sans', sans-serif;
    --container-width: 1024px;
    --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(--accent2); text-decoration: none; transition: var(--transition); }
  a:hover { color: var(--accent); }
  h1, h2, h3, h4 { font-family: var(--font-heading); text-transform: uppercase; line-height: 1.2; }

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

  /* HEADER (Part A1 Match) */
  header {
    background-color: var(--surface);
    border-bottom: 2px solid var(--accent);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
  }
  .logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
  }
  .menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.8rem;
    cursor: pointer;
  }
  nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
  }
  nav a {
    color: var(--text);
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.5px;
  }
  nav a:hover { color: var(--accent); }

  /* HERO SECTION */
  .hero {
    position: relative;
    padding: 60px 20px;
    background: linear-gradient(135deg, rgba(38,13,13,0.9) 0%, rgba(20,5,5,0.95) 100%),
                repeating-linear-gradient(45deg, #1a0707 0, #1a0707 10px, #140505 10px, #140505 20px);
    border-bottom: 4px solid var(--accent);
    text-align: center;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,107,0,0.15) 0%, transparent 60%);
    pointer-events: none;
  }
  .breadcrumb {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 20px;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 2;
  }
  .hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: #fff;
    text-shadow: 2px 2px 0px var(--accent), 4px 4px 0px rgba(0,0,0,0.5);
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
  }
  .meta-chips {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    position: relative;
    z-index: 2;
  }
  .chip {
    background: rgba(255,107,0,0.1);
    border: 1px solid var(--accent);
    color: var(--accent2);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .intro-lead {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.15rem;
    color: var(--text);
    border-left: 4px solid var(--accent2);
    padding: 15px 20px;
    background: rgba(38,13,13,0.6);
    text-align: left;
    position: relative;
    z-index: 2;
    border-radius: 0 8px 8px 0;
  }

  /* MAIN ARTICLE */
  .article-content {
    padding: 60px 0;
    counter-reset: section-counter;
  }
  .article-section {
    margin-bottom: 50px;
  }
  .article-section h2 {
    font-size: 1.8rem;
    color: var(--accent2);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid rgba(194, 136, 136, 0.2);
    padding-bottom: 10px;
  }
  .article-section h2::before {
    counter-increment: section-counter;
    content: "0" counter(section-counter);
    background: var(--accent);
    color: #fff;
    width: 40px;
    height: 40px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    transform: skewX(-10deg);
    box-shadow: 2px 2px 0 #000;
  }
  .article-section p {
    margin-bottom: 1rem;
    font-size: 1.05rem;
    color: #e0d4d4;
  }
  .article-section a {
    font-weight: 600;
    border-bottom: 1px dashed var(--accent2);
  }

  /* ILLUSTRATED CHECKLIST */
  .feature-list {
    list-style: none;
    margin: 25px 0;
    display: grid;
    gap: 15px;
  }
  .feature-list li {
    background: var(--surface);
    padding: 15px 20px 15px 55px;
    border-radius: 8px;
    position: relative;
    border-left: 4px solid var(--accent);
    font-size: 1.05rem;
  }
  .feature-list li::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 18px;
    width: 24px;
    height: 24px;
    background-color: var(--accent2);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center / contain;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center / contain;
  }

  /* PRO TIP BOX */
  .pro-tip-box {
    background: linear-gradient(to right, var(--surface), #1a0707);
    border: 2px dashed var(--accent);
    padding: 30px;
    border-radius: 12px;
    position: relative;
    margin: 40px 0;
  }
  .pro-tip-box::before {
    content: 'PIT STOP TIP';
    position: absolute;
    top: -14px;
    left: 30px;
    background: var(--accent);
    color: #fff;
    font-family: var(--font-heading);
    padding: 2px 12px;
    font-size: 0.9rem;
    border-radius: 4px;
    letter-spacing: 1px;
  }
  .pro-tip-box h2 { border: none; padding: 0; margin-bottom: 15px; }
  .pro-tip-box h2::before { display: none; }

  /* RELATED PAGES BLOCK */
  .related-nav {
    background: var(--surface);
    padding: 40px 0;
    border-top: 1px solid #3a1515;
    border-bottom: 1px solid #3a1515;
  }
  .related-nav h3 {
    text-align: center;
    color: var(--text);
    margin-bottom: 30px;
    font-size: 1.5rem;
  }
  .related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
  }
  .related-card {
    display: block;
    background: var(--bg);
    border: 1px solid #3a1515;
    padding: 15px;
    text-align: center;
    border-radius: 6px;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    border-bottom: none;
  }
  .related-card:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255,107,0,0.2);
  }

  /* FAQ SECTION */
  .faq-section {
    padding: 60px 0;
  }
  .faq-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--accent2);
    margin-bottom: 40px;
  }
  details {
    background: var(--surface);
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #3a1515;
  }
  summary {
    padding: 20px;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    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: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s ease;
  }
  details[open] summary::after {
    transform: rotate(45deg);
  }
  details p {
    padding: 0 20px 20px;
    color: #e0d4d4;
    border-top: 1px solid #3a1515;
    margin-top: 10px;
    padding-top: 15px;
  }

  /* GRAND CTA */
  .cta-block {
    background: linear-gradient(45deg, #260d0d 0%, #140505 100%);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-top: 4px solid var(--accent);
  }
  .cta-block::after {
    content: '';
    position: absolute;
    right: 0; top: 0; bottom: 0; width: 30%;
    background: repeating-linear-gradient(90deg, transparent, transparent 20px, rgba(255,255,255,0.03) 20px, rgba(255,255,255,0.03) 40px);
    pointer-events: none;
    transform: skewX(-20deg);
  }
  .cta-block h2 {
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 15px;
    position: relative;
    z-index: 2;
  }
  .cta-block p {
    color: var(--muted);
    margin-bottom: 30px;
    font-size: 1.1rem;
    position: relative;
    z-index: 2;
  }
  .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    position: relative;
    z-index: 2;
  }
  .btn {
    display: inline-block;
    padding: 12px 30px;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    clip-path: polygon(15px 0, 100% 0, calc(100% - 15px) 100%, 0 100%);
    min-width: 160px;
    text-align: center;
    border: none;
    cursor: pointer;
  }
  .btn-primary {
    background: var(--accent);
    color: #fff;
  }
  .btn-primary:hover { background: var(--accent-hover); color: #fff; }
  .btn-outline {
    background: var(--surface);
    color: var(--accent2);
    box-shadow: inset 0 0 0 2px var(--accent2);
  }
  .btn-outline:hover { background: var(--accent2); color: var(--bg); }

  /* FOOTER (Part A2 Match) */
  footer {
    background-color: var(--surface);
    padding: 50px 0 20px;
    border-top: 1px solid #3a1515;
  }
  .footer-top {
    text-align: center;
    margin-bottom: 40px;
  }
  .footer-brand {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .footer-tagline {
    color: var(--muted);
  }
  .footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
    text-align: center;
  }
  .footer-links div {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .footer-links a {
    color: var(--muted);
    font-size: 0.95rem;
  }
  .footer-links a:hover { color: var(--accent2); }
  .footer-bottom {
    text-align: center;
    color: #664444;
    font-size: 0.85rem;
    padding-top: 20px;
    border-top: 1px solid #3a1515;
  }

  /* RESPONSIVE */
  @media (max-width: 768px) {
    .menu-toggle { display: block; }
    nav {
      position: absolute;
      top: 70px;
      left: 0;
      width: 100%;
      background: var(--surface);
      border-bottom: 2px solid var(--accent);
      display: none;
    }
    nav.active { display: block; }
    nav ul {
      flex-direction: column;
      padding: 20px;
      gap: 15px;
    }
    .cta-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 300px; }
  }
  @media (max-width: 390px) {
    .hero h1 { font-size: 1.8rem; }
    .meta-chips { flex-direction: column; align-items: center; gap: 10px; }
    .article-section h2 { font-size: 1.4rem; }
    .feature-list li { padding-left: 45px; font-size: 0.95rem; }
    .feature-list li::before { left: 10px; width: 20px; height: 20px; }
    .pro-tip-box { 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; }