:root {
    --primary: #15336e;
    --secondary: #866A2D;
    --accent: #f7b733;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray: #6c757d;
    --light-gray: #e9ecef;
    --transition: all 0.3s ease;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.15);
}


.w {
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 20px;
}

.space {
    height: 60px;
}

.header-placeholder {
    height: 80px;
    background: linear-gradient(to right, var(--primary), #2a5298);
}

/* 页面标题区域 */
.page-banner {
    position: relative;
    height: 50vh;
    min-height: 400px;
    overflow: hidden;
    border-radius: 0 0 20px 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(26, 42, 108, 0.85), rgba(26, 42, 108, 0.85)), url('https://images.unsplash.com/photo-1561070791-2526d30994b5?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
}

.banner-content {
    text-align: center;
    color: white;
    max-width: 1000px;
    padding: 0 20px;
}

.banner-content h1 {
    font-size: 3.8rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.banner-content p {
    font-size: 1.5rem;
    opacity: 0.9;
    margin-bottom: 40px;
}

.banner-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-top: 30px;
}

.btn {
    padding: 16px 40px;
    background: linear-gradient(to right, #b17d0b, #f7b733);
    color: #fff;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    box-shadow: 0 6px 15px rgba(134, 106, 45, 0.3);
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(134, 106, 45, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
}

/* 评标流程区域 */
.evaluation-process {
    padding: 100px 0;
    background: white;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
    position: relative;
}

.section-header h2 {
    font-size: 2.8rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.25rem;
    color: #6c757d;
    max-width: 800px;
    margin: 25px auto 0;
}

.process-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
    position: relative;
}

.process-container::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 50px;
    right: 50px;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    z-index: 1;
}

.process-step {
    flex: 0 0 calc(20% - 30px);
    min-width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.step-icon {
    width: 120px;
    height: 120px;
    background: white;
    border: 3px solid #f7b733;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.process-step:hover .step-icon {
    transform: scale(0.9);
    background: linear-gradient(to bottom, var(--primary), #2a5298);
    color: white;
    border-color: var(--primary);
}

.step-content h3 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.step-content p {
    color: var(--gray);
    line-height: 1.7;
}

/* 服务优势区域 */
.benefits-section {
    padding: 100px 0;
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
    position: relative;
}

.benefits-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.benefit-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.benefit-header {
    background: linear-gradient(to right, var(--primary), #2a5298);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.benefit-icon {
    font-size: 2.5rem;
    color: #f7b733;
}

.benefit-title {
    color: white;
    font-size: 1.8rem;
}

.benefit-content {
    padding: 30px;
    flex-grow: 1;
}

.benefit-content p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.benefit-list {
    list-style: none;
    margin-top: 20px;
}

.benefit-list li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 15px;
    color: var(--dark);
    line-height: 1.6;
}

.benefit-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
    font-size: 1.2rem;
}

/* 服务范围区域 */
.services-section {
    padding: 100px 0;
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid var(--light-gray);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

.service-icon {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary);
    background: linear-gradient(to bottom, rgba(26, 42, 108, 0.05), rgba(26, 42, 108, 0.1));
}

.service-content {
    padding: 30px;
    text-align: center;
}

.service-content h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.service-content p {
    color: var(--gray);
    line-height: 1.8;
}

/* 数据展示区域 */
.stats-section {
    padding: 100px 0;
    background: linear-gradient(to right, var(--primary), #2a5298);
    color: white;
}

.stats-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 40px;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.stat-number {
    font-size: 4.5rem;
    font-weight: 700;
    color: #f7b733;
    margin-bottom: 10px;
    line-height: 1;
}

.stat-label {
    font-size: 1.3rem;
    opacity: 0.9;
}

/* 专家团队区域 */
.experts-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.experts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.expert-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.expert-image {
    height: 300px;
    overflow: hidden;
}

.expert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.expert-card:hover .expert-image img {
    transform: scale(1.05);
}

.expert-info {
    padding: 25px;
    text-align: center;
}

.expert-name {
    font-size: 1.7rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.expert-title {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 15px;
}

.expert-bio {
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.expert-contact {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.expert-contact a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    transition: var(--transition);
}

.expert-contact a:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .process-step {
        flex: 0 0 calc(25% - 30px);
    }

    .process-container::before {
        display: none;
    }
}

@media (max-width: 992px) {
    .banner-content h1 {
        font-size: 3rem;
    }

    .process-step {
        flex: 0 0 calc(33.333% - 30px);
    }

    .section-header h2 {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .page-banner {
        height: 40vh;
    }

    .banner-content h1 {
        font-size: 2.4rem;
    }

    .banner-content p {
        font-size: 1.2rem;
    }

    .banner-buttons {
        flex-direction: column;
        align-items: center;
    }

    .process-step {
        flex: 0 0 calc(50% - 30px);
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .banner-content h1 {
        font-size: 2rem;
    }

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

    .stat-number {
        font-size: 3.5rem;
    }

    .process-step {
        flex: 0 0 100%;
    }
}

:root {
    --primary: #2b418e;
    --secondary: #4361ee;
    --accent: #F7B733FF;
    --light-gray: #e9ecef;
    --transition-base: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* 1. 原有动画基础样式保留 */
header {
    transition: background-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}
header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.animate-in {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.animate-in:nth-child(2n) { transition-delay: 0.1s; }
.animate-in:nth-child(3n) { transition-delay: 0.2s; }
.animate-in:nth-child(4n) { transition-delay: 0.3s; }

.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: var(--transition-base);
}
.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%) scale(0);
    border-radius: 50%;
    transition: transform 0.6s ease;
    z-index: -1;
}
.btn:hover::after {
    transform: translate(-50%, -50%) scale(1);
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(43, 65, 142, 0.2);
}
.btn.btn-outline:hover {
    background-color: rgba(247, 37, 133, 0.1);
}

.process-step {
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}
.process-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background-color: var(--accent);
    transition: height 0.3s ease;
}
.process-step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    background-color: rgba(255, 255, 255, 0.8);
}
.process-step:hover::before {
    height: 100%;
}

.benefit-card {
    transition: var(--transition-base);
    overflow: hidden;
}
.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.benefit-card:hover .benefit-icon {
    color: var(--accent);
    transform: scale(1.15);
}
.benefit-list li {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}
.benefit-card:hover .benefit-list li {
    opacity: 1;
}

.service-card {
    transition: var(--transition-base);
    position: relative;
}
.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    background-color: rgba(255, 255, 255, 0.9);
}
.service-card:hover::after {
    transform: scaleX(1);
}

.section-header {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.section-header.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 2. AI新增动画效果 */
.ai-flow-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    animation: flow 3s linear infinite;
    transform-origin: left;
    z-index: -1;
}
@keyframes flow {
    0% { background-position: -100% 0; }
    100% { background-position: 200% 0; }
}
.ai-pulse {
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}