:root {
      --primary: #eab308;
      --accent: #f59e0b;
      --bg: #18181b;
      --text: #fafafa;
      --border: 2px solid #fafafa;
      --shadow: 8px 8px 0px rgba(234, 179, 8, 0.6);
      --shadow-sm: 4px 4px 0px rgba(245, 158, 11, 0.5);
      --radius: 0px;
      --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: var(--font-sans);
      font-feature-settings: 'ss01' on, 'ss02' on;
      letter-spacing: 0.01em;
      margin: 0;
      overflow-x: hidden;
    }

    /* 顶部细微噪点纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      pointer-events: none;
      opacity: 0.4;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
      z-index: 1;
      mix-blend-mode: overlay;
    }

    /* 滚动进度条 */
    #scroll-progress {
      position: fixed;
      top: 0;
      left: 0;
      width: 0%;
      height: 4px;
      background: var(--primary);
      z-index: 9999;
      box-shadow: 0 0 8px var(--accent);
    }

    /* 导航 */
    .navbar-hard {
      background: rgba(24, 24, 27, 0.85);
      backdrop-filter: blur(8px);
      border-bottom: var(--border);
      border-radius: 0;
      padding: 0.8rem 1.5rem;
      z-index: 2000;
    }

    .navbar-brand {
      font-weight: 900;
      font-size: 1.9rem;
      color: var(--primary) !important;
      letter-spacing: -0.02em;
      margin-right: 2rem;
    }

    .navbar-nav .nav-link {
      color: var(--text);
      font-weight: 600;
      margin: 0 0.8rem;
      padding: 0.3rem 0;
      border-bottom: 2px solid transparent;
      transition: 0.15s;
    }

    .navbar-nav .nav-link:hover {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }

    .nav-cta {
      background: var(--primary);
      color: #18181b !important;
      padding: 0.4rem 1.2rem !important;
      font-weight: 800;
      border: 2px solid #fafafa;
      box-shadow: 3px 3px 0 #fafafa;
    }

    /* 全屏 hero */
    .hero-full {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      background: var(--bg);
      border-bottom: var(--border);
      position: relative;
      padding: 6rem 1.5rem 4rem;
      margin-bottom: 2rem;
    }

    .hero-type-container {
      font-size: clamp(2.8rem, 10vw, 6.5rem);
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -0.03em;
      text-transform: uppercase;
      color: var(--text);
      min-height: 2em;
    }

    .hero-type-container .typed-cursor {
      color: var(--primary);
      font-weight: 300;
      margin-left: 0.15em;
    }

    .hero-sub {
      font-size: 1.2rem;
      font-weight: 400;
      margin-top: 2rem;
      max-width: 700px;
      opacity: 0.9;
      border-left: 4px solid var(--primary);
      padding-left: 1.2rem;
      text-align: left;
    }

    /* 区块标题 */
    .section-title {
      font-weight: 900;
      font-size: 2.5rem;
      border-bottom: 4px solid var(--primary);
      display: inline-block;
      padding-bottom: 0.4rem;
      margin-bottom: 2.5rem;
      letter-spacing: -0.02em;
    }

    /* 三栏卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .hard-card {
      background: #212124;
      border: 2px solid var(--text);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 2rem 1.5rem;
      transition: transform 0.15s ease, box-shadow 0.15s;
      position: relative;
    }

    .hard-card:hover {
      transform: translate(-2px, -2px);
      box-shadow: 12px 12px 0 var(--primary);
    }

    .card-icon {
      font-size: 2.5rem;
      color: var(--primary);
      margin-bottom: 1.2rem;
      filter: drop-shadow(2px 2px 0 var(--accent));
    }

    .hard-card h3 {
      font-weight: 800;
      font-size: 1.6rem;
      margin-bottom: 0.8rem;
      color: var(--primary);
    }

    .hard-card p {
      color: #e4e4e7;
      font-weight: 400;
      margin-bottom: 0;
    }

    /* FAQ 折叠 */
    .faq-section {
      background: #1c1c1f;
      padding: 4rem 1.5rem;
      border-top: var(--border);
      border-bottom: var(--border);
    }

    .accordion-hard .accordion-item {
      background: transparent;
      border: 2px solid var(--text);
      border-radius: 0;
      margin-bottom: 1.2rem;
      box-shadow: 4px 4px 0 rgba(234, 179, 8, 0.3);
    }

    .accordion-hard .accordion-header .accordion-button {
      background: #26262a;
      color: var(--text);
      font-weight: 700;
      font-size: 1.2rem;
      border-radius: 0;
      box-shadow: none;
      padding: 1.2rem 1.8rem;
    }

    .accordion-hard .accordion-button:not(.collapsed) {
      background: var(--primary);
      color: #18181b;
      border-bottom: 2px solid #fafafa;
    }

    .accordion-hard .accordion-body {
      background: #1e1e21;
      color: #ddd;
      border-top: 2px solid var(--primary);
      font-weight: 400;
      padding: 1.5rem 1.8rem;
    }

    /* 介绍区块 */
    .intro-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      padding: 4rem 1.5rem;
    }

    .intro-text {
      font-size: 1.15rem;
      line-height: 1.8;
      color: #e0e0e0;
      font-weight: 300;
      border-right: 2px solid var(--primary);
      padding-right: 2rem;
    }

    .intro-text strong {
      color: var(--primary);
      font-weight: 700;
    }

    .intro-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      align-items: center;
    }

    .stat-item {
      flex: 1 1 100px;
      background: #202024;
      border: 2px solid #fafafa;
      padding: 1.2rem 0.8rem;
      text-align: center;
      box-shadow: 4px 4px 0 var(--accent);
    }

    .stat-item .num {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--primary);
      display: block;
      line-height: 1;
    }

    /* CTA */
    .cta-zone {
      padding: 5rem 1.5rem;
      text-align: center;
      border-top: var(--border);
      background: #18181b;
    }

    .cta-zone .btn-xl {
      background: var(--primary);
      color: #18181b;
      border: 2px solid #fafafa;
      font-weight: 900;
      font-size: 1.5rem;
      padding: 0.9rem 3.4rem;
      border-radius: 0;
      box-shadow: 6px 6px 0 #fafafa;
      transition: 0.1s;
    }

    .cta-zone .btn-xl:hover {
      background: var(--accent);
      box-shadow: 8px 8px 0 #fafafa;
      color: #18181b;
    }

    /* 页脚 + 友链 */
    .footer-links {
      background: #141416;
      border-top: var(--border);
      padding: 2rem 1.5rem 3rem;
      margin-top: 2rem;
    }

    .footer-links h5 {
      color: var(--primary);
      font-weight: 800;
      margin-bottom: 1rem;
    }

    .friend-links {
      color: #aaa;
      background: #1d1d1f;
      padding: 0.8rem 1.2rem;
      border: 2px solid #3f3f46;
      font-size: 0.95rem;
      display: inline-block;
      width: 100%;
      box-shadow: none;
    }

    .copyright-bar {
      background: #111113;
      border-top: 2px solid var(--primary);
      padding: 1rem 1.5rem;
      text-align: center;
      color: #b9b9c0;
      font-weight: 400;
      font-size: 0.95rem;
    }

    .copyright-bar span {
      color: var(--primary);
      font-weight: 600;
    }

    /* 通用 */
    .container-custom {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    .img-hover-play {
      position: relative;
      overflow: hidden;
      border: 2px solid #fafafa;
    }

    .img-hover-play img {
      width: 100%;
      height: auto;
      display: block;
      transition: opacity 0.2s;
    }

    .img-hover-play .play-overlay {
      position: absolute;
      inset: 0;
      background: rgba(24, 24, 27, 0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transition: 0.2s;
    }

    .img-hover-play:hover .play-overlay {
      opacity: 1;
    }

    .img-hover-play .play-overlay i {
      font-size: 3.5rem;
      color: var(--primary);
      filter: drop-shadow(2px 2px 0 #18181b);
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
      .card-grid {
        grid-template-columns: 1fr;
      }
      .intro-block {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .intro-text {
        border-right: none;
        border-bottom: 2px solid var(--primary);
        padding-right: 0;
        padding-bottom: 1.5rem;
      }
      .navbar-collapse {
        background: #18181b;
        border-top: 2px solid var(--primary);
        padding-top: 1rem;
        margin-top: 0.8rem;
      }
    }

/* --- 子页面追加 --- */
/* 保证所有卡片、容器都跟随暗色与硬边框风格，防止Bootstrap默认白底 */
    .about-card, .about-card .card-body,
    .about-feature-item, .about-list-item,
    .about-blockquote, .about-timeline-item {
      background: var(--bg) !important;
      color: var(--text) !important;
      border: var(--border) !important;
      border-radius: var(--radius) !important;
      box-shadow: var(--shadow-sm) !important;
    }
/* 覆盖可能的Bootstrap白色背景类 */
    .about-card, .about-card *,
    .about-feature-item, .about-feature-item *,
    .about-list-item, .about-list-item *,
    .about-blockquote, .about-blockquote *,
    .about-timeline-item, .about-timeline-item * {
      background-color: transparent !important;
      color: var(--text) !important;
      border-color: inherit !important;
    }
/* 硬边阴影与hover效果 */
    .about-card, .about-feature-item, .about-timeline-item {
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      border: var(--border);
    }
.about-card:hover, .about-feature-item:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow);
    }
/* 小标题强调色 */
    .about-highlight {
      color: var(--primary);
      font-weight: 800;
    }
/* 泡面菌特色引用块 */
    .about-blockquote {
      border-left: 6px solid var(--accent);
      padding: 1.5rem 2rem;
      font-style: italic;
      font-size: 1.1rem;
      box-shadow: var(--shadow-sm);
      background: var(--bg);
    }
/* 时间轴竖线 */
    .about-timeline {
      position: relative;
      padding-left: 2rem;
    }
.about-timeline::before {
      content: "";
      position: absolute;
      left: 8px;
      top: 0;
      bottom: 0;
      width: 3px;
      background: var(--accent);
      opacity: 0.35;
    }
.about-timeline-item {
      position: relative;
      margin-bottom: 2rem;
      padding: 1.5rem 1.2rem;
      border: var(--border);
      background: var(--bg);
    }
.about-timeline-item::before {
      content: "🍜";
      position: absolute;
      left: -2.2rem;
      top: 1rem;
      background: var(--bg);
      font-size: 1.4rem;
      line-height: 1;
      padding: 0 4px;
    }
/* 列表符号 */
    .about-list-item {
      list-style: none;
      padding: 0.75rem 1rem 0.75rem 2.2rem;
      background: var(--bg);
      border: var(--border);
      box-shadow: var(--shadow-sm);
      margin-bottom: 0.8rem;
      position: relative;
      font-weight: 500;
    }
.about-list-item::before {
      content: "▹";
      color: var(--accent);
      font-weight: 900;
      position: absolute;
      left: 1rem;
      font-size: 1.2rem;
    }
/* 小图标统一 */
    .about-icon {
      color: var(--primary);
      margin-right: 10px;
      font-size: 1.2rem;
    }
/* 确保Bootstrap导航链接颜色继承 */
    .navbar .nav-link {
      color: var(--text) !important;
    }
.navbar .nav-link:hover {
      color: var(--primary) !important;
    }
.navbar .nav-link.active {
      color: var(--primary) !important;
      font-weight: 700;
    }