:root {
      /* Premium Global Consulting Palette */
      --primary-navy: #0A2540;     /* Deep authoritative blue */
      --primary-blue: #1D4ED8;     /* Royal action blue */
      --accent-gold: #D97706;      /* Amber/Gold for highlights */
      --accent-light: #FEF3C7;
      
      --bg-white: #ffffff;
      --bg-gray: #F8FAFC;
      --bg-blue-light: #EFF6FF;
      
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      
      --shadow-sm: 0 4px 12px rgba(10, 37, 64, 0.04);
      --shadow-md: 0 12px 30px rgba(10, 37, 64, 0.08);
      --shadow-lg: 0 24px 50px rgba(10, 37, 64, 0.12);
      
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --max-w: 1240px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "DM Sans", system-ui, -apple-system, sans-serif;
      background: var(--bg-white);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; transition: 0.3s; }
    img { max-width: 100%; display: block; }
    
    .container { width: min(var(--max-w), 100% - 48px); margin: 0 auto; }
    .section { padding: 100px 0; position: relative; }
    section[id] { scroll-margin-top: 96px; }
    .section-gray { background: var(--bg-gray); }
    .section-navy { background: var(--primary-navy); color: white; }
    .section-navy .text-muted { color: #94A3B8; }

    /* Typography */
    h1, h2, h3, h4 { font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; }
    .title-xl { font-size: clamp(2.5rem, 4vw, 3.5rem); margin-bottom: 20px; }
    .title-lg { font-size: 1.75rem; margin-bottom: 16px; }
    .title-md { font-size: 1.35rem; margin-bottom: 12px; }
    p { margin-bottom: 1rem; color: var(--text-muted); font-size: 1.05rem; }
    .section-navy p { color: rgba(255,255,255,0.8); }

    /* Badges & Eyebrows */
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 8px 16px; border-radius: 100px;
      font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
      background: var(--bg-blue-light); color: var(--primary-blue); border: 1px solid rgba(29, 78, 216, 0.2);
      margin-bottom: 24px;
    }
    .section-navy .eyebrow { background: rgba(255,255,255,0.1); color: var(--accent-light); border-color: rgba(255,255,255,0.2); }
    
    .tag {
      display: inline-flex; padding: 6px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px;
    }
    .tag-gold { background: var(--accent-light); color: var(--accent-gold); }
    .tag-blue { background: var(--bg-blue-light); color: var(--primary-blue); }
    .tag-navy { background: #E2E8F0; color: var(--primary-navy); }

    /* Buttons */
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 10px;
      padding: 18px 36px; border-radius: 100px; font-weight: 700; font-size: 1.1rem;
      border: 1px solid transparent; cursor: pointer; transition: all 0.3s ease;
    }
    .btn-primary { background: var(--accent-gold); color: white; box-shadow: 0 10px 20px rgba(217, 119, 6, 0.2); }
    .btn-primary:hover { background: #B45309; transform: translateY(-2px); box-shadow: 0 15px 30px rgba(217, 119, 6, 0.3); }
    .btn-secondary { background: white; color: var(--primary-navy); border-color: var(--border-color); box-shadow: var(--shadow-sm); }
    .btn-secondary:hover { border-color: var(--primary-navy); color: var(--primary-navy); }
    .btn-outline-white { background: transparent; color: white; border-color: rgba(255,255,255,0.3); }
    .btn-outline-white:hover { background: white; color: var(--primary-navy); }

    /* Navigation */
    .nav {
      position: fixed; top: 0; width: 100%; z-index: 100;
      background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
    .brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 1.25rem; color: var(--primary-navy); }
    .brand i { color: var(--primary-blue); font-size: 1.8rem; }
    .nav-links { display: flex; gap: 30px; font-weight: 600; font-size: 0.95rem; }
    .nav-links a:hover { color: var(--primary-blue); }


    /* =========================================
       Hero Section - 沉浸式实景背景版 (现代金融写字楼)
    ========================================= */
    .hero {
      padding: 180px 0 100px; text-align: center;
      /* 使用深色玻璃幕墙写字楼实景 */
      background: url('../images/feilvbintu.webp') center/cover no-repeat fixed;
      color: white;
      position: relative; overflow: hidden;
    }
    /* 2. 叠加深海军蓝 (Navy) 磨砂遮罩，保证文字对比度与高级感 */
    .hero::before {
      content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(180deg, rgba(10, 37, 64, 0.85) 0%, rgba(10, 37, 64, 0.95) 100%);
      z-index: 0; pointer-events: none;
    }
    /* 3. 保留皇家蓝 (Royal Blue) 的中心微光晕，增强视觉聚焦 */
    .hero::after {
      content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
      width: 1000px; height: 1000px; border-radius: 50%;
      background: radial-gradient(circle, rgba(29, 78, 216, 0.2) 0%, transparent 70%);
      z-index: 0; pointer-events: none;
    }
    /* 确保内容层在遮罩之上 */
    .hero .container { position: relative; z-index: 1; }
	
	
	
    .hero-title { font-size: clamp(3rem, 6vw, 5rem); max-width: 1000px; margin: 0 auto 24px; line-height: 1.1; }
    .hero-title span { color: var(--accent-gold); }
    .hero-sub { font-size: 1.25rem; max-width: 800px; margin: 0 auto 40px; color: rgba(255,255,255,0.8); }
    
    .proof-strip { display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; margin-top: 60px; }
    .proof-chip {
      padding: 10px 20px; border-radius: 100px; background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.2); font-size: 0.9rem; font-weight: 700; color: white;
      display: flex; align-items: center; gap: 8px; backdrop-filter: blur(5px);
    }

    /* Grids & Cards */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }

    .card {
      background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg);
      padding: 40px 30px; box-shadow: var(--shadow-sm); transition: all 0.3s ease; height: 100%;
    }
    .card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--primary-blue); }
    .card-icon {
      width: 56px; height: 56px; border-radius: 16px; display: inline-flex; align-items: center; justify-content: center;
      background: var(--bg-blue-light); color: var(--primary-blue); font-size: 1.5rem; margin-bottom: 24px;
    }
    
    .section-navy .card { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1); color: white; }
    .section-navy .card:hover { border-color: var(--accent-gold); }
    .section-navy .card-icon { background: rgba(217, 119, 6, 0.15); color: var(--accent-gold); }

    /* Lists */
    .checklist { list-style: none; margin-top: 20px; }
    .checklist li { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; font-size: 1.05rem; }
    .check-icon { color: var(--primary-blue); font-size: 1.2rem; margin-top: 2px; }
    .section-navy .check-icon { color: var(--accent-gold); }

    /* Reimagined Data Dashboard / Snapshot */
    .data-dashboard {
      background: white; border-radius: var(--radius-xl); padding: 50px;
      box-shadow: var(--shadow-lg); border: 1px solid var(--border-color); margin-top: -60px; position: relative; z-index: 10;
    }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--border-color); }
    .metric-item { border-right: 1px solid var(--border-color); padding-right: 24px; }
    .metric-item:last-child { border-right: none; }
    .metric-value { font-size: 3rem; font-weight: 900; color: var(--primary-navy); line-height: 1; margin-bottom: 8px; }

    /* Tables */
    .table-container { overflow: hidden; border-radius: var(--radius-lg); border: 1px solid var(--border-color); background: white; box-shadow: var(--shadow-sm); }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { padding: 20px 24px; border-bottom: 1px solid var(--border-color); }
    th { background: var(--bg-gray); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
    tr:last-child td { border-bottom: none; }
    td strong { color: var(--primary-navy); }

    /* Pricing */
    .pricing-card { border: 2px solid var(--border-color); position: relative; }
    .pricing-card.popular { border-color: var(--primary-blue); transform: scale(1.05); box-shadow: var(--shadow-lg); z-index: 2; }
    .price-amount { font-size: 3.5rem; font-weight: 900; color: var(--primary-navy); margin: 20px 0 10px; }
    .price-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--primary-blue); color: white; padding: 6px 16px; border-radius: 100px; font-size: 0.85rem; font-weight: 700; }

    /* FAQ */
    .faq-item { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 16px; overflow: hidden; }
    .faq-btn { width: 100%; text-align: left; padding: 24px; background: none; border: none; font-size: 1.15rem; font-weight: 700; color: var(--primary-navy); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
    .faq-btn i { color: var(--primary-blue); transition: transform 0.3s; }
    .faq-answer { max-height: 0; padding: 0 24px; transition: all 0.3s ease; opacity: 0; }
    .faq-item.active { border-color: var(--primary-blue); box-shadow: var(--shadow-sm); }
    .faq-item.active .faq-btn i { transform: rotate(180deg); }
    .faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 24px; opacity: 1; }

    /* Image Wrappers */
    .img-wrap { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); height: 100%; min-height: 400px; position: relative; }
    .img-wrap img { width: 100%; height: 100%; object-fit: cover; position: absolute; }

    /* Sticky CTA */
    .sticky-cta {
      position: fixed; bottom: 24px; right: 24px; z-index: 90;
      background: var(--primary-navy); color: white; padding: 16px 24px;
      border-radius: 100px; box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: 20px;
    }
    
    /* Reveal Animation */
    [data-reveal] { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
    [data-reveal].visible { opacity: 1; transform: translateY(0); }

    @media (max-width: 1024px) {
      .grid-2, .grid-3, .grid-4, .split-layout { grid-template-columns: 1fr; gap: 30px; }
      .nav-links { display: none; }
      .hero { padding: 140px 0 60px; }
      .data-dashboard { margin-top: 0; padding: 30px; }
      .metric-grid { grid-template-columns: 1fr 1fr; }
      .metric-item { border-right: none; border-bottom: 1px solid var(--border-color); padding: 0 0 20px 0; margin-bottom: 20px; }
      .pricing-card.popular { transform: scale(1); }
      .img-wrap { min-height: 300px; }
    }
    /* =========================================
       客户案例
    ========================================= */
    .case-featured { background: linear-gradient(135deg, var(--primary-navy), #113054); border-radius: var(--radius-lg); padding: 60px; color: white; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; box-shadow: var(--shadow-lg); margin-bottom: 30px; position: relative; overflow: hidden; }
    .case-featured::before { content: ''; position: absolute; right: -10%; top: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(217, 119, 6, 0.15) 0%, transparent 70%); pointer-events: none; }
    .case-featured h3 { color: white; font-size: 2.2rem; margin: 20px 0; line-height: 1.2; letter-spacing: -0.03em; font-weight: 800; }
    .case-text { color: rgba(255, 255, 255, 0.8); line-height: 1.7; margin-bottom: 20px; font-size: 1.05rem; }
    .metric-wrap { display: flex; flex-wrap: wrap; gap: 40px; margin-bottom: 40px; }
    .metric-item strong { display: block; font-size: 3rem; font-weight: 900; color: var(--accent-gold); line-height: 1; margin-bottom: 8px; }
    .metric-item span { font-size: 0.85rem; color: rgba(255, 255, 255, 0.6); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; }
    .testimonial-box { background: rgba(255, 255, 255, 0.05); padding: 30px; border-radius: var(--radius-md); border-left: 4px solid var(--accent-gold); backdrop-filter: blur(10px); }
    .testimonial-box p { font-style: italic; color: rgba(255, 255, 255, 0.95); margin-bottom: 15px; font-size: 1.05rem; }
    .case-results { margin-top: auto; border-top: 1px solid var(--border-color); padding-top: 20px; display: flex; gap: 20px; }
    .result-item { font-size: 0.9rem; font-weight: 700; color: var(--primary-blue); display: flex; align-items: center; gap: 8px; }
    
    @media (max-width: 1024px) {
      .case-featured { grid-template-columns: 1fr; padding: 40px 24px; gap: 30px; }
    }

	/* =========================================
       Floating TOC (左下角悬浮目录)
    ========================================= */
    .floating-toc {
      position: fixed;
      bottom: 24px;
      left: 24px;
      z-index: 95;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    .toc-toggle {
      background: var(--primary-navy);
      color: white;
      border: 1px solid rgba(255,255,255,0.1);
      padding: 14px 24px;
      border-radius: 100px;
      font-size: 0.95rem;
      font-weight: 700;
      font-family: inherit;
      cursor: pointer;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      gap: 10px;
      transition: all 0.3s ease;
    }
    .toc-toggle:hover {
      background: var(--primary-blue);
      transform: translateY(-2px);
    }
    .toc-menu {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 16px;
      box-shadow: var(--shadow-lg);
      margin-bottom: 12px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      width: max-content;
      min-width: 220px;
      max-height: calc(100vh - 120px);
      overflow-y: auto;
      overscroll-behavior: contain;
      scrollbar-width: thin;
      /* 动画属性 */
      opacity: 0;
      visibility: hidden;
      transform: translateY(20px);
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      transform-origin: bottom left;
    }
    .toc-menu.open {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .toc-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 10px 14px;
      border-radius: 12px;
      transition: all 0.2s;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .toc-link::before {
      content: '';
      width: 6px; height: 6px; border-radius: 50%;
      background: transparent;
      transition: all 0.2s;
    }
    .toc-link:hover, .toc-link.active {
      background: var(--bg-blue-light);
      color: var(--primary-blue);
    }
    .toc-link.active::before {
      background: var(--accent-gold);
      box-shadow: 0 0 8px var(--accent-gold);
    }

    /* 移动端防遮挡适配：在手机上稍微抬高，避免和右下角客服按钮打架 */
    @media (max-width: 768px) {
      .floating-toc { bottom: 90px; left: 16px; }
      .toc-toggle { padding: 12px 20px; font-size: 0.9rem; }
      .price-amount { font-size: 2.8rem; }
      .toc-menu {
        width: min(270px, calc(100vw - 32px));
        min-width: 0;
        max-height: calc(100vh - 180px);
      }
    }
	/* =========================================
       WhatsApp 悬浮动效 & 表单响应式
    ========================================= */
    .wa-container { position: fixed; bottom: 40px; right: 40px; z-index: 1000; display: flex; align-items: center; justify-content: center; text-decoration: none; width: 56px; height: 56px; }
    .wa-tooltip { position: absolute; right: 75px; background: white; color: var(--primary-navy); font-size: 0.85rem; font-weight: 700; padding: 8px 16px; border-radius: 8px; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); opacity: 0; visibility: hidden; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); pointer-events: none; white-space: nowrap; border: 1px solid var(--border-color); transform: translateX(10px); }
    .wa-container:hover .wa-tooltip { opacity: 1; visibility: visible; transform: translateX(0); }
    .wa-tooltip-arrow { position: absolute; top: 50%; right: -5px; transform: translateY(-50%) rotate(45deg); width: 10px; height: 10px; background: white; border-right: 1px solid var(--border-color); border-top: 1px solid var(--border-color); }
    .wa-button { position: relative; width: 56px; height: 56px; background-color: #25D366; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 1.875rem; box-shadow: 0 4px 14px 0 rgba(37,211,102,0.39); z-index: 10; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
    .wa-container:hover .wa-button { box-shadow: 0 6px 20px rgba(37,211,102,0.3); transform: scale(1.1); }
    .wa-ping { position: absolute; inset: 0; border-radius: 50%; border: 2px solid #25D366; opacity: 0.75; z-index: 0; animation: waPing 2s cubic-bezier(0, 0, 0.2, 1) infinite; }
    @keyframes waPing { 75%, 100% { transform: scale(1.6); opacity: 0; } }

    .contact-left { flex: 1; min-width: 320px; background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%); padding: 60px 40px; color: white; position: relative; overflow: hidden; }
    .contact-right { flex: 1.5; min-width: 320px; padding: 60px 40px; background: rgba(255, 255, 255, 0.95); }

    @media (max-width: 768px) {
        .wa-container { bottom: 20px; right: 15px; width: 50px; height: 50px; }
        .wa-button { width: 50px; height: 50px; font-size: 1.6rem; }
        .wa-tooltip { display: none; }
        .contact-left, .contact-right { padding: 40px 20px !important; flex: 1 1 100% !important; min-width: 100% !important; max-width: 100vw !important; }
    }