:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.5);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: white;
    color: var(--primary-color);
    border-color: white;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .section-desc {
    margin: 0 auto;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 24px;
    font-weight: 700;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-md);
}

.logo-text {
    color: var(--text-primary);
}

.navbar:not(.scrolled) .logo-text {
    color: white;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.navbar.scrolled .nav-link {
    color: var(--text-secondary);
}

.nav-link:hover,
.nav-link.active {
    color: white;
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: white;
    transition: var(--transition);
}

.navbar.scrolled .hamburger span {
    background: var(--text-primary);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 50%, var(--primary-color) 100%);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    color: white;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #60a5fa, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-item * {
    color: inherit;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: white;
}

.stat-percent {
    font-size: 36px;
    font-weight: 700;
    color: white;
}

.stat-plus {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

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

.hero-image {
    position: relative;
    width: 400px;
    height: 400px;
}

.hero-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.3), rgba(14, 165, 233, 0.3));
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.3;
    }
}

.floating-card {
    position: absolute;
    background: white;
    padding: 20px 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 4s ease-in-out infinite;
}

.floating-card i {
    font-size: 24px;
    color: var(--primary-color);
}

.floating-card span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-1 {
    top: 20px;
    left: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
    animation-delay: 1s;
}

.card-3 {
    bottom: 20px;
    left: 20px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.card-2 {
    animation: float2 4s ease-in-out infinite;
    animation-delay: 1s;
}

@keyframes float2 {
    0%, 100% {
        transform: translateY(-50%);
    }
    50% {
        transform: translateY(calc(-50% - 15px));
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.6);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.services {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.service-card.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.service-card.featured .service-desc,
.service-card.featured .service-features li {
    color: rgba(255, 255, 255, 0.9);
}

.service-card.featured .service-link {
    color: white;
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon i {
    font-size: 32px;
    color: var(--primary-color);
}

.service-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-features {
    margin-bottom: 24px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.service-features li i {
    color: var(--primary-color);
    font-size: 12px;
}

.service-card.featured .service-features li i {
    color: white;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-color);
}

.service-link:hover {
    gap: 12px;
}

.about {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-img-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.about-shape {
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    opacity: 0.2;
}

.about-placeholder {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    height: 450px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    border-radius: var(--radius-xl);
}

.about-placeholder i {
    font-size: 80px;
    margin-bottom: 20px;
    opacity: 0.8;
}

.about-placeholder span {
    font-size: 24px;
    font-weight: 500;
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: white;
    padding: 24px 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.exp-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.exp-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.about-text .section-tag {
    margin-bottom: 12px;
}

.about-text .section-title {
    margin-bottom: 24px;
}

.about-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 20px;
    color: var(--primary-color);
}

.feature-text h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 14px;
    color: var(--text-secondary);
}

.advantages {
    padding: 80px 0;
    background: var(--bg-dark);
    position: relative;
}

.advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.advantages .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.advantages .section-title {
    color: white;
}

.advantages .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    position: relative;
}

.advantage-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition);
}

.advantage-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.advantage-icon i {
    font-size: 28px;
    color: white;
}

.advantage-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.process {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

.process-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin: 0 auto 24px;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
}

.process-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.process-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.contact {
    padding: 80px 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-title {
    margin-bottom: 20px;
}

.contact-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 20px;
    color: var(--primary-color);
}

.contact-label {
    display: block;
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.form-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    font-size: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-family: inherit;
    outline: none;
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
}

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

.form-note {
    text-align: center;
    font-size: 13px;
    color: var(--text-light);
    margin-top: 16px;
}

.feishu-form {
    width: 100%;
    height: 400px;
    border: none;
    border-radius: var(--radius-md);
}

.footer {
    background: var(--bg-dark);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 80px;
    margin-bottom: 50px;
    align-items: start;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    margin-bottom: 24px;
    max-width: 320px;
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    text-align: center;
    margin-top: 10px;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        display: none;
    }

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

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

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }

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

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-dark);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-menu .nav-link {
        font-size: 24px;
        color: white;
    }

    .nav-actions {
        display: none;
    }

    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 36px;
    }

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

    .hero-stats {
        flex-wrap: wrap;
        gap: 30px;
    }

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

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

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

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

    .contact-wrapper {
        gap: 40px;
    }

    .contact-details {
        gap: 16px;
    }

    .footer-content {
        gap: 32px;
    }

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

    .about-features {
        gap: 20px;
    }
}

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

    .hero {
        padding: 100px 0 60px;
    }

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

    .hero-subtitle {
        font-size: 14px;
    }

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

    .btn-lg {
        padding: 12px 24px;
        font-size: 14px;
    }

    .stat-item {
        flex: 1;
        min-width: 80px;
    }

    .stat-number {
        font-size: 28px;
    }

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

    .section-desc {
        font-size: 14px;
    }

    .service-card {
        padding: 24px 20px;
    }

    .service-title {
        font-size: 18px;
    }

    .advantage-item {
        padding: 20px;
    }

    .advantage-item h3 {
        font-size: 16px;
    }

    .contact-form-wrapper {
        padding: 24px 16px;
    }

    .form-title {
        font-size: 20px;
    }

    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .contact-icon {
        width: 40px;
        height: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-column h4 {
        font-size: 16px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }

    .navbar {
        padding: 12px 0;
    }

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

    .about-feature {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
    }

    .experience-badge {
        padding: 12px 16px;
    }

    .exp-number {
        font-size: 24px;
    }
}

/* 额外的移动端优化 */
@media (max-width: 768px) {
    /* 触摸友好的按钮和链接 */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .nav-link {
        padding: 12px 0;
    }

    .service-link {
        padding: 12px 0;
    }

    /* 表单元素优化 */
    input, select, textarea {
        font-size: 16px !important;
    }

    /* 防止横向滚动 */
    html, body {
        overflow-x: hidden;
    }

    /* 图片自适应 */
    img {
        max-width: 100%;
        height: auto;
    }

    /* 表格优化 */
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .btn {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* 打印样式 */
@media print {
    .navbar, .back-to-top, .hamburger {
        display: none !important;
    }

    .hero {
        padding-top: 20px;
    }

    body {
        font-size: 12pt;
    }
}