* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0f172a;
    --primary-dark: #020617;
    --primary-light: #1e293b;
    --secondary: #1e40af;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --dark: #0f172a;
    --dark-gray: #334155;
    --gray: #64748b;
    --light-gray: #94a3b8;
    --light: #f1f5f9;
    --lighter: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #0f172a 0%, #1e40af 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.12);
    --shadow-hover: 0 8px 30px rgba(15, 23, 42, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 20px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

.brand-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.brand-icon {
    font-size: 1.8rem;
    color: var(--accent);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    padding: 0.5rem 0;
    font-size: 0.95rem;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-menu a:hover::after {
    width: 100%;
}

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

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

.nav-menu a.active::after {
    width: 100%;
}

/* 首页横幅 - 专业科技风格 */
.hero {
    position: relative;
    width: 100%;
    overflow: hidden;
    background: var(--gradient);
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 轮播图 */
.hero-carousel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-carousel-item.active {
    opacity: 1;
}

.hero-carousel-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.7) 0%, rgba(30, 64, 175, 0.6) 100%);
}

/* 轮播图指示器 */
.hero-carousel-indicators {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

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

.hero-carousel-indicators .indicator.active {
    background: var(--accent);
    width: 24px;
    border-radius: 6px;
}

.hero-banner {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    z-index: 2;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    color: white;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    font-weight: 400;
    line-height: 1.6;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--accent);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-primary {
    text-decoration: none;
    display: inline-flex;
}

.btn-secondary {
    text-decoration: none;
    display: inline-flex;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    padding: 1rem 2.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

/* 通用区块 */
.section {
    padding: 100px 20px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.bg-light {
    background: var(--lighter);
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.about-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.about-card:hover::before {
    transform: scaleX(1);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(15, 23, 42, 0.1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: var(--accent);
}

.about-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.about-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* 项目展示 */
.projects-controls {
    margin-bottom: 3rem;
}

.search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto 2rem;
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--white);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    color: var(--gray);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.5rem;
    border: 2px solid #e2e8f0;
    background: var(--white);
    color: var(--dark-gray);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.95rem;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(15, 23, 42, 0.1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.5rem;
}

.project-card h3 {
    color: var(--primary);
    margin-bottom: 0;
    font-size: 1.3rem;
    font-weight: 600;
    flex: 1;
}

.project-badge {
    background: var(--primary);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    margin-left: 1rem;
}

.project-name-en {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.project-tech {
    color: var(--dark-gray);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.tech-label {
    font-weight: 600;
    color: var(--primary);
}

.project-desc-wrapper {
    flex: 1;
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--gray);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-footer {
    margin-top: auto;
}

.btn-view-detail {
    width: 100%;
    padding: 0.8rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-view-detail:hover {
    background: var(--primary-light);
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.page-btn {
    padding: 0.8rem 1.5rem;
    background: var(--white);
    border: 2px solid #e2e8f0;
    color: var(--dark-gray);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover:not(:disabled) {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    color: var(--dark-gray);
    font-weight: 500;
    font-size: 0.95rem;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    height: 44px;
}

.total-info {
    color: var(--primary);
    font-size: 0.95rem;
}

/* 页码跳转 */
.page-jump {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.jump-label {
    color: var(--dark-gray);
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    height: 44px;
}

.page-input {
    width: 70px;
    padding: 0.8rem 0.8rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark-gray);
    background: var(--white);
    transition: all 0.3s;
    outline: none;
    height: 44px;
    box-sizing: border-box;
}

.page-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.1);
}

.page-input::-webkit-inner-spin-button,
.page-input::-webkit-outer-spin-button {
    opacity: 1;
}

.page-jump-btn {
    padding: 0.8rem 1.2rem;
    font-size: 0.95rem;
    height: 44px;
}

/* 加载和空状态 */
.loading {
    text-align: center;
    padding: 4rem;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #e2e8f0;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.no-data {
    text-align: center;
    padding: 4rem;
    color: var(--gray);
}

.no-data-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 2rem;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    animation: slideUp 0.3s;
    box-shadow: var(--shadow-lg);
    touch-action: pan-y;
    overscroll-behavior: contain;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--light);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
}

.modal-close:hover {
    background: var(--primary);
    color: var(--white);
    transform: rotate(90deg);
}

.project-detail h2 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.detail-name-en {
    color: var(--gray);
    font-style: italic;
    margin-bottom: 1.5rem;
}

.detail-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.detail-badge {
    background: var(--primary);
    color: var(--white);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.detail-date {
    color: var(--gray);
    font-size: 0.9rem;
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section h3 {
    color: var(--primary);
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
}

.detail-tech {
    color: var(--dark-gray);
    line-height: 1.8;
    padding: 1rem;
    background: var(--light);
    border-radius: 10px;
}

.detail-description {
    color: var(--gray);
    line-height: 2;
    font-size: 1.05rem;
}

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    background: var(--light);
    padding: 2.5rem;
    border-radius: 16px;
}

.contact-info h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.info-item {
    margin-bottom: 1rem;
    color: var(--dark-gray);
    line-height: 1.8;
}

.info-note {
    margin-top: 1.5rem;
    color: var(--gray);
    font-style: italic;
}

/* 二维码 */
.qrcode-container {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(15, 23, 42, 0.1);
    text-align: center;
}

.qrcode-image {
    max-width: 200px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 2px solid rgba(15, 23, 42, 0.1);
}

.contact-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.char-counter {
    text-align: right;
    font-size: 0.85rem;
    color: var(--gray);
    margin-top: 0.3rem;
}

.success-message {
    margin-top: 1rem;
    padding: 1rem;
    background: #d1fae5;
    color: #065f46;
    border-radius: 8px;
    border: 1px solid #6ee7b7;
}

.error-message {
    margin-top: 1rem;
    padding: 1rem;
    background: #fee2e2;
    color: #991b1b;
    border-radius: 8px;
    border: 1px solid #fca5a5;
}

/* 页脚 */
.footer {
    background: var(--primary);
    color: var(--white);
    padding: 3rem 20px;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.icp-info {
    font-size: 0.9rem;
    opacity: 0.8;
}

#icp-text {
    color: var(--accent);
    cursor: pointer;
}

/* 页面头部 */
.page-hero {
    background: var(--gradient);
    padding: 120px 20px 80px;
    text-align: center;
    color: white;
}

.page-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.page-subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
}

/* 服务能力展示 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.4s;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-hover);
}

.service-icon-wrapper {
    margin-bottom: 1.5rem;
}

.service-icon {
    font-size: 4rem;
    display: inline-block;
    transition: transform 0.3s;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.service-card p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.service-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.tech-tag {
    background: var(--light);
    color: var(--primary);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(15, 23, 42, 0.1);
    transition: all 0.3s;
}

.service-card:hover .tech-tag {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* 技术栈展示 */
.tech-showcase {
    position: relative;
    overflow: hidden;
}

.tech-showcase::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

.tech-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.4s;
    border: 1px solid rgba(15, 23, 42, 0.06);
    position: relative;
    overflow: hidden;
}

.tech-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.tech-item:hover::after {
    left: 100%;
}

.tech-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

.tech-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: block;
    transition: transform 0.3s;
}

.tech-item:hover .tech-icon {
    transform: scale(1.2) rotate(10deg);
}

.tech-item h4 {
    color: var(--primary);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.tech-item p {
    color: var(--gray);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 优势展示 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

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

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
    transition: transform 0.3s;
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(-5deg);
}

.feature-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* 优势列表 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    position: relative;
    border-left: 4px solid var(--accent);
}

.advantage-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-hover);
}

.advantage-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 3rem;
    font-weight: 800;
    color: var(--light);
    line-height: 1;
    opacity: 0.3;
}

.advantage-item h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
}

.advantage-item p {
    color: var(--gray);
    line-height: 1.8;
}

/* 首页特效 */
.section-services {
    position: relative;
    overflow: hidden;
}

.section-services::before,
.section-services::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(30, 64, 175, 0.08);
    filter: blur(50px);
    animation: floatDots 16s ease-in-out infinite;
    z-index: 0;
}

.section-services::before {
    top: 10%;
    left: 5%;
}

.section-services::after {
    bottom: 5%;
    right: 10%;
    animation-delay: -8s;
}

@keyframes floatDots {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.1); }
}

.section-services .container,
.section-why .container,
.tech-showcase .container {
    position: relative;
    z-index: 1;
}

.tech-item {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    animation: techPop 0.8s ease forwards;
}

@keyframes techPop {
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.tech-marquee {
    margin-top: 3rem;
    overflow: hidden;
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: var(--white);
    box-shadow: var(--shadow);
}

.marquee-track {
    display: flex;
    gap: 2rem;
    padding: 1.2rem 0;
    animation: marquee 18s linear infinite;
    min-width: max-content;
}

.marquee-track span {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.section-why {
    position: relative;
    overflow: hidden;
}

.section-why::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(245, 158, 11, 0.08), transparent 50%);
    z-index: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 0.8rem;
        font-size: 0.85rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .pagination {
        flex-direction: column;
        gap: 1rem;
    }
    
    .page-jump {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .page-input {
        width: 70px;
        padding: 0.8rem 0.8rem;
        height: 44px;
    }
    
    .page-btn,
    .page-info,
    .jump-label {
        height: 44px;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .services-grid,
    .tech-grid,
    .features-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .nav-menu {
        font-size: 0.78rem;
        gap: 0.5rem;
    }
}