.nav-menu ul li a {
    position: relative;
    display: inline-block;
}

.nav-menu ul li a::after {
    max-width: 100%;
    box-sizing: border-box;
}

/* ============ AI Hero ============ */
.ai-hero {
    background: linear-gradient(135deg, #0a0e27 0%, #1a1a3e 40%, #2d1b4e 70%, #1a1a2e 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.ai-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    z-index: 0;
}

.ai-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 15% 25%, rgba(0, 212, 255, 0.15) 0%, transparent 8%),
        radial-gradient(circle at 85% 15%, rgba(155, 89, 182, 0.15) 0%, transparent 8%),
        radial-gradient(circle at 75% 75%, rgba(0, 212, 255, 0.12) 0%, transparent 8%),
        radial-gradient(circle at 25% 85%, rgba(155, 89, 182, 0.12) 0%, transparent 8%),
        radial-gradient(circle at 50% 50%, rgba(233, 69, 96, 0.08) 0%, transparent 10%);
}

.neural-network::before,
.neural-network::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="600" height="400" viewBox="0 0 600 400"><g fill="none" stroke="rgba(0,212,255,0.08)" stroke-width="1"><line x1="90" y1="100" x2="300" y2="80"/><line x1="90" y1="100" x2="300" y2="200"/><line x1="90" y1="100" x2="300" y2="320"/><line x1="510" y1="100" x2="300" y2="80"/><line x1="510" y1="100" x2="300" y2="200"/><line x1="510" y1="100" x2="300" y2="320"/><line x1="510" y1="300" x2="300" y2="80"/><line x1="510" y1="300" x2="300" y2="200"/><line x1="510" y1="300" x2="300" y2="320"/><line x1="90" y1="300" x2="300" y2="80"/><line x1="90" y1="300" x2="300" y2="200"/><line x1="90" y1="300" x2="300" y2="320"/></g><g fill="rgba(0,212,255,0.4)"><circle cx="90" cy="100" r="3"/><circle cx="90" cy="300" r="3"/><circle cx="510" cy="100" r="3"/><circle cx="510" cy="300" r="3"/></g><g fill="rgba(155,89,182,0.5)"><circle cx="300" cy="80" r="4"/><circle cx="300" cy="200" r="4"/><circle cx="300" cy="320" r="4"/></g></svg>');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    opacity: 0.7;
}

.neural-network::after {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="600" height="400" viewBox="0 0 600 400"><g fill="none" stroke="rgba(155,89,182,0.06)" stroke-width="1"><line x1="30" y1="200" x2="200" y2="150"/><line x1="30" y1="200" x2="200" y2="250"/><line x1="570" y1="200" x2="400" y2="150"/><line x1="570" y1="200" x2="400" y2="250"/><line x1="200" y1="150" x2="400" y2="250"/><line x1="200" y1="250" x2="400" y2="150"/></g><g fill="rgba(0,212,255,0.3)"><circle cx="30" cy="200" r="2.5"/><circle cx="570" cy="200" r="2.5"/></g></svg>');
    opacity: 0.5;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    animation: orbFloat 12s ease-in-out infinite;
}

.glow-orb-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.4), transparent 70%);
    top: -50px;
    right: 10%;
}

.glow-orb-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(155, 89, 182, 0.35), transparent 70%);
    bottom: -80px;
    left: 5%;
    animation-delay: -4s;
}

.glow-orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.25), transparent 70%);
    top: 40%;
    left: 45%;
    animation-delay: -8s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.1); }
    66% { transform: translate(-20px, 25px) scale(0.95); }
}

.ai-hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    font-size: 0.85rem;
    color: #7dd3fc;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.hero-tag i {
    color: #00d4ff;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    font-weight: 700;
    background: linear-gradient(135deg, #00d4ff 0%, #9b59b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text .subtitle {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: #f8f9fa;
}

.hero-text .description {
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
    max-width: 550px;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-icon-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 400px;
}

.hero-icon-item {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.hero-icon-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.25);
    border-color: rgba(0, 212, 255, 0.4);
}

.hero-icon-item i {
    font-size: 2rem;
    color: #00d4ff;
}

.hero-icon-item:nth-child(1) i { color: #00d4ff; }
.hero-icon-item:nth-child(2) i { color: #9b59b6; }
.hero-icon-item:nth-child(3) i { color: #2ecc71; }
.hero-icon-item:nth-child(4) i { color: #e94560; }
.hero-icon-item:nth-child(5) i { color: #f39c12; }
.hero-icon-item:nth-child(6) i { color: #3498db; }

.hero-icon-item span {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-buttons .btn-outline {
    border-color: rgba(255, 255, 255, 0.5);
    color: #fff;
}

.hero-buttons .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

/* ============ 核心服务 ============ */
.core-services-section {
    padding: 80px 0;
}

.core-services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.core-service-card {
    background: white;
    border-radius: 16px;
    padding: 28px 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border-top: 4px solid transparent;
    position: relative;
    overflow: hidden;
}

.core-service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.03), rgba(155, 89, 182, 0.03));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.core-service-card:hover::before {
    opacity: 1;
}

.core-service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.core-service-card:nth-child(1) { border-top-color: #00d4ff; }
.core-service-card:nth-child(2) { border-top-color: #9b59b6; }
.core-service-card:nth-child(3) { border-top-color: #e94560; }
.core-service-card:nth-child(4) { border-top-color: #f39c12; }

.core-service-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.core-service-card:nth-child(1) .core-service-icon {
    background: linear-gradient(135deg, #00d4ff, #3498db);
}
.core-service-card:nth-child(2) .core-service-icon {
    background: linear-gradient(135deg, #9b59b6, #6c3483);
}
.core-service-card:nth-child(3) .core-service-icon {
    background: linear-gradient(135deg, #e94560, #c0392b);
}
.core-service-card:nth-child(4) .core-service-icon {
    background: linear-gradient(135deg, #f39c12, #e67e22);
}

.core-service-icon i {
    font-size: 1.6rem;
    color: white;
}

.core-service-card h3 {
    font-size: 1.15rem;
    color: #333;
    margin-bottom: 6px;
    position: relative;
    z-index: 1;
}

.core-service-desc {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 16px;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.core-service-list {
    list-style: none;
    padding: 0;
    position: relative;
    z-index: 1;
}

.core-service-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid #f5f5f5;
    font-size: 0.85rem;
    color: #555;
}

.core-service-list li:last-child {
    border-bottom: none;
}

.core-service-list li i {
    color: #2ecc71;
    margin-top: 4px;
    flex-shrink: 0;
}

/* ============ 技术架构 ============ */
.architecture-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.architecture-stack {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.arch-layer {
    background: white;
    border-radius: 12px;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    border-left: 5px solid #3498db;
    position: relative;
}

.arch-layer:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.arch-layer-1 { border-left-color: #00d4ff; }
.arch-layer-2 { border-left-color: #9b59b6; }
.arch-layer-3 { border-left-color: #e94560; }
.arch-layer-4 { border-left-color: #2ecc71; }
.arch-layer-5 { border-left-color: #f39c12; }

.arch-layer-label {
    flex-shrink: 0;
    min-width: 200px;
    position: relative;
}

.arch-layer-num {
    display: inline-block;
    padding: 3px 10px;
    background: #f0f3f7;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: #555;
    margin-bottom: 6px;
}

.arch-layer-1 .arch-layer-num { background: rgba(0, 212, 255, 0.15); color: #0094c6; }
.arch-layer-2 .arch-layer-num { background: rgba(155, 89, 182, 0.15); color: #6c3483; }
.arch-layer-3 .arch-layer-num { background: rgba(233, 69, 96, 0.15); color: #c0392b; }
.arch-layer-4 .arch-layer-num { background: rgba(46, 204, 113, 0.15); color: #1e8c4e; }
.arch-layer-5 .arch-layer-num { background: rgba(243, 156, 18, 0.15); color: #c87f0a; }

.arch-layer-label h3 {
    font-size: 1.15rem;
    color: #333;
    margin-bottom: 4px;
}

.arch-layer-label p {
    font-size: 0.85rem;
    color: #888;
}

.arch-layer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    flex: 1;
}

.arch-tag {
    padding: 6px 14px;
    background: #f8f9fa;
    border: 1px solid #e8e8e8;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #555;
    transition: all 0.3s ease;
}

.arch-tag:hover {
    background: #eef5fc;
    border-color: #3498db;
    color: #3498db;
    transform: translateY(-2px);
}

/* ============ 应用场景 ============ */
.scenarios-section {
    padding: 80px 0;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.scenario-card {
    background: white;
    border-radius: 14px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.scenario-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 212, 255, 0.2);
}

.scenario-icon {
    width: 55px;
    height: 55px;
    border-radius: 12px;
    background: linear-gradient(135deg, #00d4ff, #9b59b6);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.scenario-icon i {
    font-size: 1.4rem;
    color: white;
}

.scenario-card h3 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
}

.scenario-card p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.7;
    margin-bottom: 16px;
}

.scenario-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.scenario-tags span {
    padding: 4px 10px;
    background: #f0f3f7;
    border-radius: 4px;
    font-size: 0.78rem;
    color: #666;
}

/* ============ 模型支持 ============ */
.models-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.models-group {
    max-width: 1100px;
    margin: 0 auto 35px;
}

.models-group:last-child {
    margin-bottom: 0;
}

.models-group-title {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.models-group-title i {
    color: #3498db;
}

.models-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.model-tag {
    padding: 10px 18px;
    background: white;
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #555;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.model-tag:hover {
    background: linear-gradient(135deg, #00d4ff, #9b59b6);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(155, 89, 182, 0.3);
}

/* ============ 部署方案 ============ */
.deployment-section {
    padding: 80px 0;
}

.deployment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    max-width: 1100px;
    margin: 0 auto;
}

.deployment-card {
    background: white;
    border-radius: 16px;
    padding: 35px 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    border: 2px solid transparent;
}

.deployment-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.deployment-card-featured {
    border-color: #9b59b6;
    background: linear-gradient(135deg, #fff 0%, #faf5ff 100%);
}

.deployment-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: linear-gradient(135deg, #9b59b6, #6c3483);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.deployment-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.deployment-card-featured .deployment-icon {
    background: linear-gradient(135deg, #9b59b6, #6c3483);
}

.deployment-icon i {
    font-size: 1.6rem;
    color: white;
}

.deployment-card h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 8px;
}

.deployment-desc {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 20px;
    line-height: 1.6;
}

.deployment-list {
    list-style: none;
    padding: 0;
}

.deployment-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 0.9rem;
    color: #555;
    border-bottom: 1px solid #f5f5f5;
}

.deployment-list li:last-child {
    border-bottom: none;
}

.deployment-list li i {
    color: #2ecc71;
    margin-top: 4px;
    flex-shrink: 0;
}

/* ============ 优势对比（复用 Office 风格） ============ */
.advantage-section {
    padding: 80px 0;
    background: white;
}

.advantage-comparison {
    max-width: 900px;
    margin: 0 auto;
}

.comparison-table {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 50px;
}

.comparison-header,
.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1.3fr 1.3fr;
}

.comparison-header {
    background: #1a1a2e;
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

.comparison-row:nth-child(even) {
    background: #f8f9fa;
}

.comparison-row:nth-child(odd) {
    background: white;
}

.comparison-col {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.comparison-dim {
    color: #666;
}

.comparison-highlight {
    color: #6c3483;
    font-weight: 600;
    background: rgba(155, 89, 182, 0.04);
}

.comparison-header .comparison-highlight {
    background: rgba(255, 255, 255, 0.1);
    color: #bb86fc;
}

.comparison-highlight i {
    color: #2ecc71;
}

.comparison-dim i {
    color: #e74c3c;
    font-size: 0.85rem;
}

.advantage-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-summary-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: 12px;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.advantage-summary-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.advantage-summary-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #00d4ff, #9b59b6);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.advantage-summary-icon i {
    font-size: 1.4rem;
    color: white;
}

.advantage-summary-card h4 {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 8px;
}

.advantage-summary-card p {
    font-size: 0.88rem;
    color: #666;
    line-height: 1.6;
}

/* ============ 定价（复用 Office 风格） ============ */
.pricing-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.pricing-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
    color: #666;
    font-size: 1rem;
    line-height: 1.8;
}

.pricing-grid-custom {
    display: grid;
    gap: 25px;
}

.pricing-tier-cards {
    grid-template-columns: repeat(3, minmax(340px, 1fr));
    max-width: 1100px;
    margin: 0 auto 25px;
}

.pricing-enterprise-cards {
    grid-template-columns: 1fr minmax(340px, 1fr) minmax(340px, 1fr) 1fr;
    max-width: 1100px;
    margin: 0 auto 40px;
}

.pricing-enterprise-cards .pricing-card-custom:first-child {
    grid-column: 2;
}

.pricing-enterprise-cards .pricing-card-custom:last-child {
    grid-column: 3;
}

.pricing-card-custom {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card-custom:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.pricing-card-custom.featured {
    border: 2px solid #9b59b6;
    transform: scale(1.03);
}

.pricing-card-custom.featured:hover {
    transform: scale(1.03) translateY(-8px);
}

.pricing-badge-custom {
    position: absolute;
    top: 15px;
    right: -30px;
    background: linear-gradient(135deg, #9b59b6, #6c3483);
    color: white;
    padding: 4px 40px;
    transform: rotate(45deg);
    font-size: 0.75rem;
    font-weight: bold;
}

.pricing-header-custom {
    padding: 30px 25px 20px;
    text-align: center;
    border-bottom: 1px solid #f5f5f5;
}

.pricing-header-custom h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 8px;
}

.pricing-header-custom .pricing-desc {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 15px;
}

.pricing-header-custom .price-range {
    font-size: 1.8rem;
    font-weight: 700;
    color: #9b59b6;
}

.pricing-header-custom .price-range small {
    font-size: 0.9rem;
    font-weight: 400;
    color: #888;
}

.pricing-body-custom {
    padding: 25px;
}

.pricing-body-custom ul {
    list-style: none;
    padding: 0;
}

.pricing-body-custom ul li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: #555;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.pricing-body-custom ul li i {
    color: #2ecc71;
    margin-top: 3px;
    flex-shrink: 0;
}

.pricing-footer-custom {
    padding: 0 25px 25px;
    text-align: center;
}

.pricing-note-custom {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    font-size: 0.9rem;
    color: #666;
    line-height: 1.8;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.pricing-note-custom i {
    color: #9b59b6;
    margin-right: 5px;
}

/* ============ 合作流程（复用 Office 风格） ============ */
.process-section {
    padding: 80px 0;
}

.process-steps {
    display: flex;
    justify-content: center;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    position: relative;
    padding: 0 15px;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 35px;
    right: -15px;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, #3498db, #9b59b6);
}

.process-step-num {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #00d4ff, #9b59b6);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 15px;
    box-shadow: 0 5px 15px rgba(155, 89, 182, 0.3);
}

.process-step h4 {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.6;
}

/* ============ 联系我们（复用 Office 风格） ============ */
.contact-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.contact-section .section-header {
    margin-bottom: 40px;
}

.contact-content-custom {
    display: flex;
    gap: 50px;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info-custom {
    flex: 1;
}

.contact-item-custom {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

.contact-icon-custom {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3498db, #9b59b6);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details-custom h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: #333;
}

.contact-details-custom p {
    color: #666;
    line-height: 1.6;
}

.contact-form-custom {
    flex: 1;
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.contact-form-custom .form-group {
    margin-bottom: 20px;
}

.contact-form-custom label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 0.95rem;
}

.contact-form-custom label .required {
    color: #e74c3c;
}

.contact-form-custom input,
.contact-form-custom textarea,
.contact-form-custom select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: inherit;
}

.contact-form-custom input:focus,
.contact-form-custom textarea:focus,
.contact-form-custom select:focus {
    outline: none;
    border-color: #9b59b6;
    box-shadow: 0 0 0 3px rgba(155, 89, 182, 0.1);
}

.contact-form-custom textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============ 页脚（复用 Office 风格） ============ */
.footer {
    background: #2c3e50;
    color: #fff;
    padding-top: 50px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    flex: 1;
    max-width: 320px;
}

.footer-logo {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 12px;
    margin-bottom: 15px;
}

.footer-logo-icon {
    width: 45px;
    height: 45px;
    object-fit: contain;
    flex-shrink: 0;
}

.footer-company-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
}

.footer-slogan {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #3498db;
    transform: translateY(-3px);
}

.social-link i {
    font-size: 1rem;
}

.footer-links {
    display: flex;
    gap: 50px;
    flex: 1;
    justify-content: flex-end;
}

.footer-column h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background: #3498db;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column ul li {
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: #3498db;
}

.footer-column ul li i {
    margin-right: 8px;
    color: #3498db;
    width: 16px;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 25px 0;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    gap: 10px;
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom .icp-info a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom .icp-info a:hover {
    color: #3498db;
}

.footer-bottom .visitor-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-bottom .visitor-stats span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.footer-bottom .visitor-stats i {
    font-size: 12px;
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
    color: #3498db;
}

.footer-bottom-links .divider {
    color: rgba(255, 255, 255, 0.3);
}

/* ============ 返回顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #3498db, #9b59b6);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(155, 89, 182, 0.4);
}

/* ============ 响应式 ============ */
@media (max-width: 992px) {
    .ai-hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-text .description {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-icon-grid {
        max-width: 320px;
    }

    .core-services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .arch-layer {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }

    .arch-layer-label {
        min-width: auto;
    }

    .contact-content-custom {
        flex-direction: column;
        gap: 30px;
    }

    .process-steps {
        gap: 20px;
    }

    .process-step:not(:last-child)::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .ai-hero {
        padding: 100px 0 60px;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }

    .hero-text .subtitle {
        font-size: 1.3rem;
    }

    .hero-icon-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .hero-icon-item {
        width: 80px;
        height: 80px;
    }

    .hero-icon-item i {
        font-size: 1.5rem;
    }

    .hero-icon-item span {
        font-size: 0.65rem;
    }

    .core-services-grid {
        grid-template-columns: 1fr;
    }

    .comparison-header,
    .comparison-row {
        grid-template-columns: 0.8fr 1.1fr 1.1fr;
    }

    .comparison-col {
        padding: 12px 10px;
        font-size: 0.82rem;
    }

    .advantage-summary {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .scenarios-grid {
        grid-template-columns: 1fr;
    }

    .pricing-tier-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-enterprise-cards {
        grid-template-columns: repeat(2, 1fr);
        max-width: 100%;
    }

    .pricing-enterprise-cards .pricing-card-custom:first-child,
    .pricing-enterprise-cards .pricing-card-custom:last-child {
        grid-column: auto;
        max-width: none;
        justify-self: center;
    }

    .pricing-card-custom.featured {
        transform: none;
    }

    .pricing-card-custom.featured:hover {
        transform: translateY(-8px);
    }

    .process-steps {
        flex-direction: column;
        align-items: center;
    }

    .process-step {
        min-width: auto;
        max-width: 300px;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-brand {
        max-width: 100%;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 30px;
    }

    .footer-column {
        text-align: center;
        min-width: 140px;
    }

    .footer-column h4::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-column ul li i {
        display: none;
    }

    .footer-bottom {
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-text h1 {
        font-size: 1.8rem;
    }

    .hero-text .subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .section {
        padding: 50px 0;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .pricing-tier-cards,
    .pricing-enterprise-cards {
        grid-template-columns: 1fr !important;
        max-width: 100%;
        gap: 15px;
    }

    .pricing-enterprise-cards .pricing-card-custom:first-child,
    .pricing-enterprise-cards .pricing-card-custom:last-child {
        grid-column: auto;
    }

    .pricing-card-custom {
        padding: 25px 20px;
        transform: none !important;
    }

    .pricing-card-custom.featured {
        transform: none !important;
    }

    .pricing-badge-custom {
        position: static;
        transform: none;
        display: inline-block;
        padding: 4px 12px;
        margin-bottom: 10px;
        font-size: 0.75rem;
    }

    .pricing-header-custom {
        padding-top: 20px;
    }

    .pricing-header-custom h3 {
        font-size: 1.3rem;
    }

    .price-range {
        font-size: 1.5rem;
    }

    .hero-icon-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .hero-icon-item {
        width: 70px;
        height: 70px;
    }

    .hero-icon-item i {
        font-size: 1.3rem;
    }

    .hero-icon-item span {
        font-size: 0.6rem;
    }

    .process-step {
        min-width: 100%;
    }

    .contact-info-custom {
        padding: 25px;
    }

    .contact-form-custom {
        padding: 20px;
    }

    .comparison-col {
        padding: 10px 8px;
        font-size: 0.78rem;
    }

    .advantage-summary {
        grid-template-columns: 1fr;
    }

    .comparison-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .comparison-header,
    .comparison-row {
        min-width: 400px;
    }
}