: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: 1px solid rgba(63, 177, 203, 0.25);
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(63, 177, 203, 0.12);
}

* {
  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;
}

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

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

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

/* 导航复用样式 */
.emblem {
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(63, 177, 203, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.beacon {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 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;
  gap: 1.5rem;
  align-items: center;
}

.aileron {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  transition: all 0.25s ease;
}

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

.aileron.active {
  color: var(--accent);
  background: rgba(63, 177, 203, 0.15);
  border: 1px solid rgba(63, 177, 203, 0.3);
}

/* 主体内容区域 */
.fuselage {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  flex: 1;
}

/* 顶部导言模块 (Hero/Intro) */
.zenith-hangar {
  background: rgba(19, 27, 41, 0.92);
  backdrop-filter: blur(16px);
  border: var(--border);
  border-radius: var(--radius);
  padding: 3rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2.5rem;
}

.strato-hangar {
  flex: 1 1 500px;
  min-width: 0;
}

.plume-h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 1rem;
}

.visor-lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}

.flange-status {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.spool-dock {
  background: var(--bg-surface);
  border: 1px solid rgba(63, 177, 203, 0.2);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  flex: 1 1 220px;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.rudder-glow {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(63, 177, 203, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.rudder-glow svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.visor-spool {
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 600;
}

.visor-sub {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.ribbon-frame {
  flex: 1 1 400px;
  min-width: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(63, 177, 203, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  background: var(--bg-surface);
}

.ribbon-view {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.ribbon-frame:hover .ribbon-view {
  transform: scale(1.02);
}

/* 模块 2：防封号核心对比策略 */
.apogee-radome {
  background: rgba(19, 27, 41, 0.7);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}

.plume-h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.visor-desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.strut-matrix {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.spool-tier {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  transition: border-color 0.25s ease;
}

.spool-tier:hover {
  border-color: rgba(63, 177, 203, 0.4);
}

.visor-risk {
  flex: 1 1 280px;
  min-width: 0;
  color: #ff6b6b;
  font-weight: 600;
  font-size: 0.98rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.visor-safe {
  flex: 2 1 340px;
  min-width: 0;
  color: var(--text-main);
  font-size: 0.95rem;
}

/* 模块 3：5个高级安全与隐私设置 */
.hangar-checklist {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

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

.nacelle-step {
  background: rgba(19, 27, 41, 0.85);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  flex: 1 1 320px;
  min-width: 0;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nacelle-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.plume-h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.4;
}

.visor-body {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.strut-hatch {
  display: inline-block;
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(63, 177, 203, 0.3);
}

/* 模块 4：解除双向限制教程 */
.hangar-tutorial {
  background: linear-gradient(135deg, rgba(19, 27, 41, 0.95) 0%, rgba(11, 15, 23, 0.9) 100%);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}

.flange-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.nacelle-guide {
  background: var(--bg-surface);
  border: 1px solid rgba(63, 177, 203, 0.2);
  border-radius: 12px;
  padding: 1.5rem;
  flex: 1 1 240px;
  min-width: 0;
  position: relative;
}

.strut-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.7;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.thrust-bot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.8rem;
  background: linear-gradient(135deg, #3fb1cb 0%, #288fa7 100%);
  color: #ffffff;
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(63, 177, 203, 0.22);
  transition: all 0.25s ease;
}

.thrust-bot:hover {
  background: linear-gradient(135deg, #54c4dd 0%, #3fb1cb 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(63, 177, 203, 0.35);
}

/* 页脚区域 */
.tarmac {
  background: #070a0f;
  border-top: 1px solid rgba(63, 177, 203, 0.15);
  padding: 3rem 1.5rem 2rem;
  margin-top: auto;
}

.anchor {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  align-items: center;
}

.base {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.plume-brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.visor-visor {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.rivet-info {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .beacon {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .vector {
    width: 100%;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .aileron {
    padding: 0.3rem 0.5rem;
    font-size: 0.85rem;
  }

  .zenith-hangar {
    padding: 1.8rem;
  }

  .apogee-radome,
  .hangar-tutorial {
    padding: 1.5rem;
  }

  .spool-tier {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .anchor {
    flex-direction: column;
    align-items: flex-start;
  }
}

.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;
            }}