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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-light: #f9fafb;
    --bg-lighter: #f3f4f6;
    --bg-dark: #1f2937;
    --bg-darker: #111827;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-dark: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
    --border-radius-lg: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.02);
}

/* Logo图标 */
.logo-icon {
    display: flex;
    align-items: center;
}

.logo-circle {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    transition: var(--transition);
}

.logo-circle:hover {
    transform: rotate(5deg) scale(1.05);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.5);
}

.logo-text {
    color: white;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 2px;
}

.logo-name {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--primary-color);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.nav-links a:hover::before {
    width: 80%;
}

/* 首页横幅 */
.hero {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 150px 20px 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    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(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(transparent, var(--white));
    pointer-events: none;
}

/* 带图片背景的区块 */
.section-bg-image {
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.section-bg-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.85) 0%, rgba(30, 64, 175, 0.85) 100%);
    pointer-events: none;
}

.section-bg-image > .container {
    position: relative;
    z-index: 1;
}

/* 首页横幅特殊处理 */
.hero.section-bg-image::before {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.75) 0%, rgba(30, 64, 175, 0.75) 100%);
}

/* 图片样式 */
.img-responsive {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.img-rounded {
    border-radius: var(--border-radius-lg);
}

.img-circle {
    border-radius: 50%;
}

.img-shadow {
    box-shadow: var(--shadow-lg);
}

.img-hover {
    transition: var(--transition);
}

.img-hover:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* 图片容器 */
.img-container {
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    position: relative;
}

.img-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.3));
    opacity: 0;
    transition: var(--transition);
}

.img-container:hover::after {
    opacity: 1;
}

.img-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.img-container:hover img {
    transform: scale(1.1);
}

/* 首页Logo */
.hero-logo {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.hero-logo-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0.1) 100%);
    border: 3px solid rgba(255, 255, 255, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), inset 0 0 20px rgba(255, 255, 255, 0.1);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.hero-logo-text {
    color: white;
    font-size: 48px;
    font-weight: bold;
    letter-spacing: 4px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-seo-text {
    max-width: 900px;
    margin: 0 auto 2rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
}

.hero-seo-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.9;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn {
    display: inline-block;
    padding: 14px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: var(--white);
}

.btn-primary:active {
    transform: translateY(-1px);
}

/* 通用区块样式 */
.section {
    padding: 100px 20px;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 700;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 1rem auto 3rem;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.text-white {
    color: var(--white);
}

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

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

.bg-dark {
    background: var(--gradient-dark);
    color: var(--white);
}

.bg-darker {
    background: var(--bg-darker);
}

/* 关于我们 */
.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    color: white;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.5) 50%, rgba(255, 255, 255, 0.3) 100%);
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-light);
    position: relative;
    padding-left: 20px;
}

.about-text p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 16px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.about-image {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-image-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-image-container {
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.about-team-img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.about-image-container:hover .about-team-img {
    transform: scale(1.05);
}

/* 占位图片样式 */
.about-placeholder-img,
.case-placeholder-img,
.news-placeholder-img {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-lighter) 100%);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.about-placeholder-img:hover,
.case-placeholder-img:hover,
.news-placeholder-img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.about-placeholder-img::before,
.case-placeholder-img::before,
.news-placeholder-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
    transition: var(--transition);
}

.about-placeholder-img:hover::before,
.case-placeholder-img:hover::before,
.news-placeholder-img:hover::before {
    opacity: 0.1;
}

.placeholder-icon {
    font-size: 4rem;
    position: relative;
    z-index: 1;
}

.placeholder-text {
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.case-image-wrapper,
.news-image-wrapper {
    margin-bottom: 1.5rem;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.news-img,
.case-img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.news-image-wrapper:hover .news-img,
.case-image-wrapper:hover .case-img {
    transform: scale(1.05);
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.tech-item {
    background: var(--white);
    padding: 1.5rem;
    text-align: center;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tech-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-item:hover::before {
    transform: scaleX(1);
}

/* 业务范围 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

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

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

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: var(--transition);
}

.service-icon-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    transition: var(--transition);
}

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

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

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 700;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 核心优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.advantage-item {
    padding: 2.5rem;
    border-left: 5px solid var(--primary-color);
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    opacity: 0.05;
    border-radius: 50%;
    transform: translate(30%, -30%);
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--accent-color);
}

.advantage-item:hover::before {
    transform: translate(20%, -20%);
    opacity: 0.1;
}

.advantage-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.15;
    margin-bottom: 1rem;
    line-height: 1;
    transition: var(--transition);
}

.advantage-item:hover .advantage-number {
    opacity: 0.25;
    transform: scale(1.05);
}

.advantage-item h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 700;
}

.advantage-item p {
    color: var(--text-light);
    line-height: 1.9;
}

/* 服务理念 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.value-item {
    text-align: center;
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.value-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: var(--transition);
}

.value-icon-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    transition: var(--transition);
}

.value-item:hover .value-icon {
    transform: scale(1.15) rotate(10deg);
}

.value-item:hover .value-icon-img {
    transform: scale(1.15) rotate(10deg);
}

.value-item h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--text-color);
    font-weight: 700;
}

.value-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 企业愿景 */
.vision-box {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 4rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.vision-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.vision-title {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.vision-text {
    font-size: 1.25rem;
    line-height: 1.9;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.contact-item {
    text-align: center;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

.contact-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: var(--transition);
}

.contact-icon-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    transform: scale(1.1);
}

.contact-item:hover .contact-icon-img {
    transform: scale(1.1);
}

.contact-item h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--white);
    font-weight: 700;
}

.contact-item p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.15rem;
    font-weight: 500;
}

/* 页脚 */
.footer {
    background: var(--gradient-dark);
    color: var(--white);
    text-align: center;
    padding: 4rem 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

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

.footer-logo-circle {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    transition: var(--transition);
}

.footer-logo-circle:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.5);
}

.footer-logo-text {
    color: white;
    font-size: 26px;
    font-weight: bold;
    letter-spacing: 2px;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-info p {
    opacity: 0.85;
    margin: 0;
    font-size: 1rem;
}

.footer-links {
    margin-top: 1rem;
    font-size: 0.95rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    text-decoration: underline;
}

.footer-seo-text {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    opacity: 0.7;
    line-height: 1.6;
    max-width: 800px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .section {
        padding: 80px 20px;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo-circle {
        width: 40px;
        height: 40px;
    }

    .logo-text {
        font-size: 16px;
    }

    .logo-name {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links a {
        padding: 0.4rem 0.8rem;
        font-size: 0.95rem;
    }

    .hero-logo-circle {
        width: 100px;
        height: 100px;
    }

    .hero-logo-text {
        font-size: 40px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .btn {
        padding: 12px 32px;
        font-size: 0.95rem;
    }

    .section {
        padding: 70px 20px;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 3rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

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

    .footer-logo-circle {
        width: 50px;
        height: 50px;
    }

    .footer-logo-text {
        font-size: 20px;
    }

    .footer {
        padding: 3rem 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 20px 80px;
    }

    .logo-circle {
        width: 35px;
        height: 35px;
    }

    .logo-text {
        font-size: 14px;
    }

    .logo-name {
        font-size: 1rem;
    }

    .hero-logo-circle {
        width: 80px;
        height: 80px;
    }

    .hero-logo-text {
        font-size: 32px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 28px;
        font-size: 0.9rem;
    }

    .section {
        padding: 60px 20px;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .tech-stack {
        grid-template-columns: 1fr;
    }

    .placeholder-icon {
        font-size: 3rem;
    }

    .placeholder-text {
        font-size: 1rem;
    }

    .footer-logo-circle {
        width: 45px;
        height: 45px;
    }

    .footer-logo-text {
        font-size: 18px;
    }

    .footer {
        padding: 2.5rem 20px;
    }

    .vision-box {
        padding: 2.5rem;
    }

    .vision-title {
        font-size: 1.7rem;
    }

    .vision-text {
        font-size: 1.1rem;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选择高亮 */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

/* 公司动态 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.news-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.news-date {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.news-date::before {
    content: '📅';
}

.news-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.4;
    font-weight: 700;
}

.news-excerpt {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    flex-grow: 1;
}

.news-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.news-link:hover {
    color: var(--secondary-color);
    transform: translateX(3px);
}

/* 成功案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 2rem;
}

.case-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-success);
    transform: scaleX(0);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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



.case-title {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.4;
    font-weight: 700;
}

.case-desc {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    flex-grow: 1;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.case-tag {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
    color: var(--success-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(16, 185, 129, 0.3);
    transition: var(--transition);
}

.case-tag:hover {
    background: var(--gradient-success);
    color: white;
    border-color: transparent;
}

.case-link {
    color: var(--success-color);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.case-link:hover {
    color: #059669;
    transform: translateX(3px);
}

/* 响应式设计 - 公司动态和案例 */
@media (max-width: 768px) {
    .news-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .news-title,
    .case-title {
        font-size: 1.3rem;
    }

    .case-image {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .news-card,
    .case-card {
        padding: 1.5rem;
    }

    .news-title,
    .case-title {
        font-size: 1.2rem;
    }

    .case-image {
        font-size: 2.5rem;
    }

    .case-tags {
        gap: 0.4rem;
    }

    .case-tag {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
    }
}

/* 关于我们 - 服务优势 */
.about-seo-info {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(30, 64, 175, 0.08) 100%);
    border-radius: var(--border-radius-lg);
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.about-seo-info::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    opacity: 0.03;
    border-radius: 50%;
    transform: translate(30%, -30%);
    transition: var(--transition);
}

.about-seo-info:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.about-seo-info:hover::before {
    transform: translate(20%, -20%);
    opacity: 0.05;
}

.about-seo-info h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
}

.about-seo-info h4::before {
    content: '🎯';
    font-size: 1.5rem;
}

.about-seo-info ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-seo-info li {
    padding: 1rem 0;
    padding-left: 2.5rem;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.05rem;
    transition: var(--transition);
    border-bottom: 1px solid rgba(37, 99, 235, 0.1);
}

.about-seo-info li:last-child {
    border-bottom: none;
}

.about-seo-info li:hover {
    color: var(--text-color);
    padding-left: 2.8rem;
    background: rgba(37, 99, 235, 0.03);
}

.about-seo-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.3rem;
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-seo-info strong {
    color: var(--text-color);
    font-weight: 700;
    margin-right: 0.3rem;
}

/* 响应式 - 服务优势 */
@media (max-width: 768px) {
    .about-seo-info {
        padding: 1.5rem;
    }

    .about-seo-info h4 {
        font-size: 1.2rem;
        margin-bottom: 1.2rem;
    }

    .about-seo-info h4::before {
        font-size: 1.3rem;
    }

    .about-seo-info li {
        padding: 0.8rem 0;
        padding-left: 2rem;
        font-size: 1rem;
    }

    .about-seo-info li:hover {
        padding-left: 2.2rem;
    }

    .about-seo-info li::before {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .about-seo-info {
        padding: 1.2rem;
    }

    .about-seo-info h4 {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }

    .about-seo-info h4::before {
        font-size: 1.2rem;
    }

    .about-seo-info li {
        padding: 0.7rem 0;
        padding-left: 1.8rem;
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .about-seo-info li:hover {
        padding-left: 2rem;
    }

    .about-seo-info li::before {
        font-size: 1.1rem;
    }

    .about-seo-info strong {
        display: block;
        margin-bottom: 0.3rem;
    }
}