: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;
     border-radius: var(--radius-lg);
 }

 .container {
     width: min(var(--max-w), 100% - 48px);
     margin: 0 auto;
 }

 .section {
     padding: 100px 0;
     position: relative;
 }

 .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.jpg') 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;
     }
 }

 /* =========================================
       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;
     /* 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;
     }
 }