/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #2563eb;
    --primary-orange: #f97316;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    font-weight: 400;
    letter-spacing: -0.01em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 2px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-brand .tagline {
    font-size: 12px;
    color: var(--text-light);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    letter-spacing: -0.01em;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-blue);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-blue);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s;
}

/* Hero区域 */
.hero {
    position: relative;
    height: 70vh;
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 20px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-orange);
}

.hero-desc {
    font-size: 18px;
    margin-bottom: 25px;
    line-height: 1.8;
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: var(--primary-orange);
    transform: scale(1.2);
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-orange);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: #ea580c;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

.btn-large {
    padding: 15px 40px;
    font-size: 18px;
}

/* 核心优势 */
.advantages {
    padding: 80px 0;
    background: var(--bg-light);
}
/* 核心优势 */
.team-members-section {
    padding: 0px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--text-dark);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: left;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.advantage-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--primary-blue);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.advantage-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 64px;
    font-weight: 700;
    color: rgba(37, 99, 235, 0.08);
    line-height: 1;
    font-family: 'Inter', sans-serif;
    z-index: 0;
}

.advantage-card h3,
.advantage-card p {
    position: relative;
    z-index: 1;
}

/* CTA区域 */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1e40af 100%);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 15px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.cta-section p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 30px 0;
    text-align: center;
}

/* 案例页面样式 */
.cases-nav {
    padding: 40px 0 20px;
    background: var(--bg-light);
}

.cases-nav-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    list-style: none;
    flex-wrap: wrap;
}

.cases-nav-list button {
    padding: 10px 25px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    color: var(--text-dark);
}

.cases-nav-list button.active,
.cases-nav-list button:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    padding: 40px 0;
}

.case-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.case-card-content {
    padding: 20px;
}

.case-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.case-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: 10px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    z-index: 10;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.7);
}

.modal-video {
    width: 100%;
    height: auto;
    display: block;
}

.modal-info {
    padding: 30px;
}

.modal-info h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-blue);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.modal-info p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 10px;
}

/* 服务页面样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 40px 0;
}

.service-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
}

.service-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 5px 20px rgba(37, 99, 235, 0.1);
}

.service-card h3 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.service-card .price {
    font-size: 32px;
    color: var(--primary-orange);
    font-weight: bold;
    margin: 20px 0;
}

.service-features {
    list-style: none;
    text-align: left;
    margin: 20px 0;
}

.service-features li {
    padding: 10px 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

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

.service-features li::before {
    content: '✓ ';
    color: var(--primary-blue);
    font-weight: bold;
    margin-right: 10px;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    padding: 40px 0;
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step::after {
    content: '→';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 30px;
    color: var(--primary-blue);
}

.process-step:last-child::after {
    display: none;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 15px;
}

.process-step h4 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 团队页面样式 */
.team-intro {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.team-intro h2 {
    font-size: 42px;
    margin-bottom: 30px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-dark);
}

.team-intro p {
    font-size: 18px;
    color: var(--text-light);
    max-width: 1200px;
    margin: 0 auto;
    line-height: 1.8;
}

.team-description {
    font-size: 18px;
    color: var(--text-dark);
    max-width: 1000px;
    margin: 0 auto;
    line-height: 2;
    text-align: left;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.team-members {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 10px 0;
}

.team-member {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.team-member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-orange));
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.team-member h3 {
    font-size: 20px;
    margin-bottom: 5px;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.team-member .role {
    color: var(--primary-blue);
    font-size: 14px;
    margin-bottom: 15px;
}

.team-member p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

.team-values {
    padding: 60px 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.value-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
}

.value-card h3 {
    font-size: 20px;
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 业务合作方向样式 */
.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    padding: 10px 0;
}

.cooperation-card {
    background: white;
    padding: 40px 35px;
    border-radius: 12px;
    text-align: left;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.cooperation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
    border-color: var(--primary-blue);
}

.cooperation-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    line-height: 1;
}

.cooperation-card h3 {
    font-size: 22px;
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-top: 10px;
}

.cooperation-card p {
    color: var(--text-light);
    line-height: 1.8;
    text-align: left;
    font-size: 15px;
}

/* 联系页面样式 */
.contact-section {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.contact-card {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
}

.contact-card h3 {
    font-size: 22px;
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.contact-card p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

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

.form-group .required {
    color: var(--primary-orange);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .advantages-grid,
    .cases-grid,
    .services-grid,
    .team-members,
    .cooperation-grid {
        grid-template-columns: 1fr;
    }

    .team-description {
        font-size: 16px;
        padding: 30px 20px;
        line-height: 1.8;
    }

    .team-intro h2 {
        font-size: 32px;
        margin-bottom: 25px;
    }

    .advantage-number {
        font-size: 36px;
        top: 15px;
        right: 15px;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .process-step::after {
        display: none;
    }

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

    .hero {
        height: 60vh;
        min-height: 400px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-content {
        padding: 15px;
    }

    .advantage-card,
    .service-card,
    .contact-form,
    .cooperation-card {
        padding: 25px 20px;
    }

    .cooperation-icon {
        font-size: 36px;
        margin-bottom: 15px;
    }

    .team-description {
        font-size: 15px;
        padding: 25px 15px;
    }

    .team-intro {
        padding: 50px 0;
    }

    .team-intro h2 {
        font-size: 28px;
    }
}