:root {
    --bg-main: #0b0f17;
    --bg-surface: #131b29;
    --bg-card: #1a2538;
    --accent: #3fb1cb;
    --accent-hover: #54c4dd;
    --accent-glow: rgba(63, 177, 203, 0.22);
    --accent-soft: rgba(63, 177, 203, 0.1);
    --text-main: #f0f4f8;
    --text-muted: #8e9db3;
    --radius: 14px;
    --border: rgba(63, 177, 203, 0.25);
  }

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

  body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    word-break: break-word;
    overflow-wrap: break-word;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.25s ease, opacity 0.25s ease;
  }

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

  .radome {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  /* 导航栏样式复用 */
  .emblem {
    width: 100%;
    background: rgba(11, 15, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  .beacon {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }

  .crest {
    display: flex;
    align-items: center;
    min-width: 0;
  }

  .crest img {
    height: 38px;
    width: auto;
    display: block;
  }

  .vector {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
  }

  .aileron {
    padding: 0.5rem 1rem;
    color: var(--text-muted);
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.25s ease;
    word-break: keep-all;
    min-width: 0;
  }

  .aileron:hover {
    color: var(--text-main);
    background: var(--accent-soft);
  }

  .aileron.active {
    color: var(--accent);
    background: var(--accent-soft);
    font-weight: 600;
  }

  /* 主内容区块 */
  .fuselage {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
  }

  /* 顶层区块 1: Hero (Intro) */
  .zenith {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2.5rem;
    padding: 3rem 2.5rem;
    background: rgba(19, 27, 41, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 24px var(--accent-glow);
    position: relative;
    overflow: hidden;
  }

  .strato {
    flex: 1 1 500px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .glint {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    border-radius: 50px;
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 600;
    width: fit-content;
  }

  .plume-h1 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800;
    line-height: 1.3;
    color: #ffffff;
    word-break: break-word;
  }

  .visor {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
  }

  .spool-flange {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
  }

  .spool {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-main);
    font-size: 0.975rem;
  }

  .rudder {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    color: var(--accent);
    margin-top: 2px;
  }

  .thrust-flange {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
  }

  .thrust {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    background: linear-gradient(135deg, #3fb1cb 0%, #288fa7 100%);
    color: #ffffff;
    font-weight: 600;
    padding: 0.85rem 1.8rem;
    border-radius: 10px;
    box-shadow: 0 6px 20px var(--accent-glow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    min-width: 0;
  }

  .thrust:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(63, 177, 203, 0.4);
    color: #ffffff;
  }

  .thrust-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-main);
    box-shadow: none;
  }

  .thrust-secondary:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
  }

  /* 浮动悬浮预览组件 (card_float 衍生) */
  .apogee-preview {
    flex: 1 1 360px;
    min-width: 0;
    display: flex;
    justify-content: center;
    position: relative;
  }

  .cabin-float {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    position: relative;
    transform: translateY(0);
    transition: transform 0.3s ease;
  }

  .cabin-float:hover {
    transform: translateY(-5px);
  }

  .float-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 1.25rem;
  }

  .float-hatch {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.6rem;
    background: rgba(63, 177, 203, 0.15);
    color: var(--accent);
    border-radius: 6px;
  }

  .preview-spool {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    margin-bottom: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.25s ease;
  }

  .preview-spool:hover {
    border-color: var(--accent-glow);
  }

  /* 顶层区块 2: Language Selector (Comparison - <div>) */
  .apogee {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .plume-h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
    font-weight: 700;
    color: #ffffff;
    position: relative;
    padding-left: 1rem;
    border-left: 4px solid var(--accent);
  }

  .nacelle-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .nacelle {
    flex: 1 1 300px;
    min-width: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    transition: all 0.25s ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  }

  .nacelle:hover {
    border-color: var(--accent);
    box-shadow: 0 12px 30px var(--accent-glow);
    transform: translateY(-3px);
  }

  .nacelle-top {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .nacelle-tag {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    background: var(--accent-soft);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    width: fit-content;
  }

  .nacelle-plume {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
  }

  .nacelle-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .propel {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1.2rem;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.25s ease;
  }

  .propel:hover {
    background: var(--accent);
    color: #ffffff;
  }

  /* 顶层区块 3: Step Guide (Steps - <aside>) */
  .bay-aside {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  }

  .rune-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
  }

  .spool-step {
    flex: 1 1 260px;
    min-width: 0;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
  }

  .step-num {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #3fb1cb, #1d6e82);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px var(--accent-glow);
  }

  .step-rune {
    font-size: 0.975rem;
    color: var(--text-main);
    line-height: 1.6;
  }

  /* 顶层区块 4: Troubleshooting (FAQ - <section>) */
  .azimuth {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .flange-faq {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .cabin-faq {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    transition: border-color 0.25s ease;
  }

  .cabin-faq:hover {
    border-color: var(--accent);
  }

  .faq-q {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }

  .faq-q .rudder {
    color: var(--accent);
  }

  .faq-a {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
    padding-left: 2rem;
  }

  /* 页脚区域 */
  .rivet {
    background: #070a10;
    border-top: 1px solid var(--border);
    padding: 3.5rem 1.5rem 2rem 1.5rem;
    margin-top: auto;
  }

  .tarmac {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
    justify-content: space-between;
    margin-bottom: 3rem;
  }

  .anchor {
    flex: 1 1 200px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
  }

  .anchor-plume {
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.25rem;
  }

  .anchor a {
    color: var(--text-muted);
    font-size: 0.9rem;
  }

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

  .base {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
  }

  .strut-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    width: 100%;
    margin: 0.5rem 0;
  }

  /* 响应式断点控制 */
  @media (max-width: 768px) {
    .beacon {
      flex-direction: column;
      gap: 1rem;
      align-items: flex-start;
    }

    .vector {
      width: 100%;
      justify-content: space-between;
    }

    .aileron {
      padding: 0.4rem 0.6rem;
      font-size: 0.875rem;
    }

    .zenith {
      padding: 1.75rem 1.25rem;
    }

    .bay-aside {
      padding: 1.5rem 1.25rem;
    }

    .tarmac {
      flex-direction: column;
      gap: 1.75rem;
    }

    .base {
      flex-direction: column;
      text-align: center;
    }

    .faq-a {
      padding-left: 0;
    }
  }

.vector-emblem{
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 15, 23, 0.88);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(63, 177, 203, 0.2);
        }

.vector-emblem .vector-beacon{
            max-width: 1320px;
            margin: 0 auto;
            padding: 1rem 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

.vector-emblem .vector-crest{
            display: flex;
            align-items: center;
            min-width: 0;
        }

.vector-emblem .vector-crest img{
            height: 38px;
            width: auto;
            object-fit: contain;
        }

.vector-emblem .vector-vector{
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            min-width: 0;
        }

.vector-emblem .vector-aileron{
            padding: 0.5rem 1.1rem;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #8e9db3;
            border: 1px solid transparent;
            transition: all 0.25s ease;
        }

.vector-emblem .vector-aileron:hover{
            color: #f0f4f8;
            background: rgba(63, 177, 203, 0.1);
            border-color: rgba(63, 177, 203, 0.2);
        }

.vector-emblem .vector-aileron.active{
            color: #ffffff;
            background: #3fb1cb;
            box-shadow: 0 0 14px rgba(63, 177, 203, 0.22);
        }

@media (max-width: 768px){.vector-emblem .vector-beacon{
                flex-direction: column;
                align-items: flex-start;
            }

.vector-emblem .vector-vector{
                width: 100%;
                justify-content: flex-start;
                overflow-x: auto;
                padding-bottom: 0.25rem;
            }}

.vector-emblem {
    background: rgb(11, 15, 23);
    background-image: none;
}

.tarmac-tarmac {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    word-break: break-word;
    color: var(--text-main);
}
.tarmac-tarmac,
.tarmac-tarmac *,
.tarmac-tarmac *::before,
.tarmac-tarmac *::after {
    box-sizing: border-box;
}

.tarmac-tarmac nav,
.tarmac-tarmac div,
.tarmac-tarmac section,
.tarmac-tarmac article,
.tarmac-tarmac aside,
.tarmac-tarmac p,
.tarmac-tarmac h1,
.tarmac-tarmac h2,
.tarmac-tarmac h3,
.tarmac-tarmac h4,
.tarmac-tarmac h5,
.tarmac-tarmac h6,
.tarmac-tarmac a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

.tarmac-tarmac p,
.tarmac-tarmac h1,
.tarmac-tarmac h2,
.tarmac-tarmac h3,
.tarmac-tarmac h4,
.tarmac-tarmac h5,
.tarmac-tarmac h6 {
    text-decoration: none;
}

.tarmac-tarmac img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.tarmac-tarmac {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.tarmac-tarmac a,
.tarmac-tarmac a:hover,
.tarmac-tarmac a:focus,
.tarmac-tarmac a:active {
    background: transparent;
    box-shadow: none;
    outline: none;
    text-decoration: none;
}

.tarmac-tarmac .tarmac-visor-cabin{
            font-size: 0.95rem;
            color: #8e9db3;
            line-height: 1.65;
        }

.tarmac-tarmac{
            background: #070a10;
            border-top: 1px solid rgba(63, 177, 203, 0.2);
            padding: 4rem 1.5rem 2.5rem 1.5rem;
            color: #8e9db3;
            font-size: 0.92rem;
        }

.tarmac-tarmac .tarmac-anchor{
            max-width: 1320px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 3rem;
            justify-content: space-between;
            margin-bottom: 3rem;
        }

.tarmac-tarmac .tarmac-base-info{
            flex: 1 1 320px;
            min-width: 0;
        }

.tarmac-tarmac .tarmac-base-brand{
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 1rem;
        }

.tarmac-tarmac .tarmac-base-links{
            flex: 2 1 500px;
            min-width: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            justify-content: flex-end;
        }

.tarmac-tarmac .tarmac-rivet-flange{
            display: flex;
            flex-direction: column;
            gap: 0.65rem;
            min-width: 130px;
        }

.tarmac-tarmac .tarmac-rivet-head{
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 0.5rem;
        }

.tarmac-tarmac .tarmac-rivet-flange a{
            color: #8e9db3;
        }

.tarmac-tarmac .tarmac-rivet-flange a:hover{
            color: #3fb1cb;
        }

.tarmac-tarmac .tarmac-tarmac-bottom{
            max-width: 1320px;
            margin: 0 auto;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.88rem;
        }

@media (max-width: 768px){.tarmac-tarmac .tarmac-base-links{
                justify-content: flex-start;
            }}