/* ===== 核心品牌色彩系统 ===== */
    :root {
      --bg-primary: #e4e0dc;
      --bg-secondary: #f2f0ed;
      --bg-card: #ffffff;
      --bg-header: #3f2814;
      --bg-footer: #25160a;
      
      --accent: #dc9700;
      --accent-hover: #f0a800;
      --accent-gradient: linear-gradient(135deg, #fed107, #dd9800);
      --accent-light: rgba(220, 151, 0, 0.1);
      
      --text-main: #111827;
      --text-secondary: #374151;
      --text-muted: #6b7280;
      --text-white: #ffffff;

      --border: #d1d5db;
      --border-light: #e5e7eb;
      
      --shadow-soft: 0 4px 20px rgba(0,0,0,0.05);
      --shadow-hover: 0 10px 30px rgba(63,40,20,0.15);
      
      --radius-xl: 20px;
      --radius-lg: 12px;
      --radius-sm: 6px;
      
      --max-width: 1200px;
      --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-mono: "SF Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
    }

    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: var(--font-base); background: var(--bg-primary); color: var(--text-secondary); line-height: 1.7; font-size: 16px; }
    a { color: var(--accent); text-decoration: none; transition: 0.3s; }
    a:hover { color: var(--bg-header); }
    .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
    section { padding: 100px 0; }
    
    /* ===== 按钮重塑 ===== */
    .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; transition: 0.3s; border: none; font-size: 1rem; }
    .btn-primary { background: var(--accent-gradient); color: var(--bg-header); box-shadow: 0 4px 10px rgba(220,151,0,0.3); }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 15px rgba(220,151,0,0.4); color: var(--bg-header); }
    .btn-outline { background: transparent; color: var(--bg-header); border: 2px solid var(--bg-header); }
    .btn-outline:hover { background: var(--bg-header); color: var(--text-white); }
    .btn-large { padding: 16px 36px; font-size: 1.1rem; border-radius: 50px; }

    /* ===== 导航 (统一版) ===== */
    .nav { position: sticky; top: 0; background: var(--bg-header); border-bottom: 2px solid var(--accent); z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
    .nav-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 70px; }
    .nav-logo { font-size: 1.5rem; font-weight: 800; color: var(--accent); }
    .nav-logo span { color: var(--text-white); }
    .nav-links { display: flex; gap: 24px; align-items: center; list-style: none; }
    .nav-links a { color: rgba(255,255,255,0.85); font-weight: 600; font-size: 0.95rem; }
    .nav-links a:hover, .nav-links a.active { color: var(--accent); }
    .nav-toggle { display: none; background: transparent; border: none; color: white; font-size: 1.5rem; cursor: pointer;}

    /* ===== 非对称 Hero 首屏 ===== */
    .hero { background: var(--bg-header); color: var(--text-white); padding: 80px 0; overflow: hidden; position: relative; }
    .hero::before { content: ''; position: absolute; right: -10%; top: -20%; width: 50%; height: 140%; background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,0.03) 10px, rgba(255,255,255,0.03) 20px); transform: rotate(-10deg); pointer-events: none; }
    
    .hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
    .hero-content h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
    .hero-content .highlight { color: var(--accent); }
    .hero-content p { font-size: 1.15rem; color: rgba(255,255,255,0.8); margin-bottom: 30px; max-width: 500px; }
    .hero-badge { display: inline-block; padding: 6px 16px; background: rgba(220,151,0,0.15); border: 1px solid var(--accent); border-radius: 20px; color: var(--accent); font-weight: bold; font-size: 0.85rem; margin-bottom: 24px; }
    
    .hero-dashboard { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .dash-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); padding: 24px; border-radius: var(--radius-lg); backdrop-filter: blur(5px); }
    .dash-card.primary { background: rgba(220,151,0,0.1); border-color: rgba(220,151,0,0.3); }
    .dash-value { font-size: 2rem; font-weight: 800; color: var(--accent); line-height: 1; margin-bottom: 8px; }
    .dash-label { font-size: 0.9rem; color: rgba(255,255,255,0.6); font-weight: 600; text-transform: uppercase; }

    /* ===== 主次分明的套餐布局 ===== */
    .section-header { text-align: center; margin-bottom: 60px; }
    .section-header h2 { font-size: 2.2rem; color: var(--bg-header); font-weight: 800; margin-bottom: 16px; }
    .section-header p { font-size: 1.1rem; color: var(--text-muted); }

    .featured-plan { background: var(--bg-card); border-radius: var(--radius-xl); padding: 40px; display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 40px; align-items: center; margin-bottom: 30px; box-shadow: var(--shadow-hover); border: 2px solid var(--accent); position: relative; overflow: hidden; }
    .featured-plan::after { content: '首选推荐'; position: absolute; top: 20px; right: -30px; background: var(--accent); color: var(--bg-header); padding: 4px 40px; font-weight: 800; font-size: 0.85rem; transform: rotate(45deg); }
    .fp-price h3 { font-size: 1.5rem; color: var(--text-main); margin-bottom: 10px; }
    .fp-price .price { font-size: 3rem; color: var(--bg-header); font-weight: 800; line-height: 1; }
    .fp-price .price span { font-size: 1rem; color: var(--text-muted); }
    .fp-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .fp-features li { display: flex; align-items: center; gap: 8px; font-weight: 600; }
    .fp-features li::before { content: '✔'; color: var(--accent); font-size: 1.2rem; }
    
    .secondary-plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 20px; }
    .plan-card { background: var(--bg-card); border-radius: var(--radius-lg); padding: 30px 24px; box-shadow: var(--shadow-soft); border: 1px solid var(--border); display: flex; flex-direction: column; transition: 0.3s; }
    .plan-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
    .plan-tag { display: inline-block; padding: 4px 12px; border-radius: 4px; font-size: 0.8rem; font-weight: 700; margin-bottom: 16px; background: var(--bg-secondary); color: var(--text-secondary); }
    .plan-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
    .plan-card .price { font-size: 2rem; font-weight: 800; color: var(--bg-header); margin-bottom: 20px; }
    .plan-card .price span { font-size: 0.9rem; color: var(--text-muted); }
    .plan-specs { list-style: none; margin-bottom: 30px; flex-grow: 1; }
    .plan-specs li { padding: 8px 0; border-bottom: 1px dashed var(--border-light); font-size: 0.95rem; }
    .plan-specs li:last-child { border: none; }
    .plan-card .btn { width: 100%; border: 1px solid var(--border); background: var(--bg-secondary); color: var(--text-main); }
    .plan-card .btn:hover { background: var(--bg-header); color: var(--text-white); border-color: var(--bg-header); }

    /* ===== Bento Box 优势布局 ===== */
    .bento-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 220px; gap: 20px; }
    .bento-item { background: var(--bg-card); border-radius: var(--radius-xl); padding: 30px; border: 1px solid var(--border); box-shadow: var(--shadow-soft); display: flex; flex-direction: column; transition: 0.3s; overflow: hidden; position: relative; }
    .bento-item:hover { transform: scale(1.02); border-color: var(--accent); }
    
    .bento-item.large { grid-column: span 2; grid-row: span 2; background: linear-gradient(135deg, var(--bg-header) 0%, #25160a 100%); color: white; justify-content: center; }
    .bento-item.large h3 { font-size: 2.2rem; color: var(--accent); margin-bottom: 16px; }
    .bento-item.large p { font-size: 1.1rem; color: rgba(255,255,255,0.8); }
    
    .bento-item.wide { grid-column: span 2; }
    .bento-item.normal { grid-column: span 1; }

    .bento-icon { font-size: 2.5rem; margin-bottom: auto; }
    .bento-item h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; color: var(--bg-header); }
    .bento-item p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.5; }

    /* ===== 机房数据表块 ===== */
    .data-center-block { background: var(--bg-card); border-radius: var(--radius-xl); border: 1px solid var(--border); padding: 40px; margin-bottom: 40px; box-shadow: var(--shadow-soft); }
    .dc-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 2px solid var(--bg-primary); }
    .dc-header h3 { font-size: 1.6rem; color: var(--bg-header); }
    .dc-badge { background: rgba(220,151,0,0.15); color: #b47a00; padding: 6px 16px; border-radius: 20px; font-weight: bold; font-size: 0.9rem; }
    
    .table-wrapper { overflow-x: auto; }
    .compare-table { width: 100%; border-collapse: collapse; min-width: 800px; text-align: left; }
    .compare-table th { padding: 16px; font-size: 0.9rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
    .compare-table td { padding: 16px; border-bottom: 1px solid var(--border-light); font-weight: 500; }
    .compare-table tr:hover td { background: var(--bg-secondary); }
    .compare-table .price { color: var(--bg-header); font-weight: 800; font-size: 1.05rem; }
    .compare-table a.btn-buy { background: var(--bg-header); color: #fff; padding: 8px 16px; border-radius: 4px; font-size: 0.85rem; display: inline-block; font-weight: bold; }
    .compare-table a.btn-buy:hover { background: var(--accent); color: var(--bg-header); }

    /* ===== 分栏 FAQ 布局 ===== */
    .faq-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; align-items: start; }
    .faq-sidebar { position: sticky; top: 100px; }
    .faq-sidebar h2 { font-size: 2.2rem; font-weight: 800; color: var(--bg-header); margin-bottom: 16px; }
    .faq-sidebar p { color: var(--text-muted); margin-bottom: 24px; }
    
    .faq-list { display: flex; flex-direction: column; gap: 16px; }
    .faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: 0.3s; }
    .faq-q { padding: 24px; font-weight: 700; font-size: 1.1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--text-main); }
    .faq-q::after { content: '+'; font-size: 1.5rem; color: var(--accent); transition: transform 0.3s; }
    .faq-item.open { border-color: var(--bg-header); box-shadow: var(--shadow-soft); }
    .faq-item.open .faq-q::after { transform: rotate(45deg); }
    .faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out; padding: 0 24px; color: var(--text-muted); line-height: 1.8; }
    .faq-item.open .faq-a { max-height: 400px; padding: 0 24px 24px; }

    /* ===== CTA 横幅 ===== */
    .cta-banner { background: var(--bg-header); padding: 60px; border-radius: var(--radius-xl); text-align: center; color: white; margin: 60px 0; background-image: radial-gradient(circle at center, rgba(220,151,0,0.15) 0%, transparent 70%); }
    .cta-banner h2 { font-size: 2rem; color: var(--accent); margin-bottom: 16px; }
    .cta-banner p { font-size: 1.1rem; opacity: 0.8; margin-bottom: 30px; }

    /* ===== 导航卡片 (Use Cases) ===== */
    .nav-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .n-card { background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--border); transition: 0.3s; display: block; color: var(--text-main); }
    .n-card:hover { border-color: var(--accent); box-shadow: var(--shadow-hover); transform: translateY(-5px); }
    .n-icon { font-size: 2rem; margin-bottom: 16px; }
    .n-card h3 { font-size: 1.2rem; margin-bottom: 8px; font-weight: 800; }
    .n-card p { color: var(--text-muted); font-size: 0.95rem; }

    /* ===== Footer (统一版) ===== */
    .footer { background: var(--bg-footer); color: rgba(255,255,255,0.6); padding: 80px 0 30px; margin-top: 80px; }
    .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; margin-bottom: 60px; padding: 0 24px; }
    .footer-col h4 { color: var(--text-white); font-size: 1.1rem; margin-bottom: 24px; font-weight: 700; }
    .footer-col p { line-height: 1.8; font-size: 0.95rem; }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 12px; }
    .footer-col a { color: rgba(255,255,255,0.6); font-size: 0.95rem; transition: 0.3s; }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 30px; text-align: center; font-size: 0.85rem; }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 40px; }
      .hero-content p { margin: 0 auto 30px; }
      .featured-plan { grid-template-columns: 1fr; text-align: center; padding: 30px; }
      .bento-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: auto; }
      .bento-item.large { grid-column: span 2; padding: 40px; text-align: center; }
      .bento-item.wide { grid-column: span 2; }
      .faq-layout { grid-template-columns: 1fr; gap: 30px; }
      .faq-sidebar { position: static; text-align: center; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .nav-toggle { display: block; }
      .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--bg-header); padding: 20px; border-top: 1px solid rgba(255,255,255,0.1); }
      
      .hero { padding: 60px 0; }
      .hero-content h1 { font-size: 2.2rem; }
      .dash-card { padding: 16px; }
      .dash-value { font-size: 1.5rem; }
      
      .secondary-plans, .nav-cards { grid-template-columns: 1fr; }
      .bento-grid { grid-template-columns: 1fr; }
      .bento-item.large, .bento-item.wide, .bento-item.normal { grid-column: span 1; grid-row: auto; }
      
      .dc-header { flex-direction: column; align-items: flex-start; gap: 10px; }
      .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    }