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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #f5a623;
    --primary-dark: #d48915;
    --primary-light: #ffc107;
    --secondary-color: #1a1a2e;
    --accent-color: #16213e;
    --text-dark: #2d3436;
    --text-light: #636e72;
    --text-muted: #b2bec3;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e8eaed;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 15px 40px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px rgba(245, 166, 35, 0.3);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.loaded .loader {
    opacity: 0;
    visibility: hidden;
}

body.loaded .hero-content h1,
body.loaded .hero-content p,
body.loaded .hero-buttons {
    animation: fadeInUp 0.8s ease forwards;
}

body.loaded .hero-content h1 { animation-delay: 0.3s; opacity: 0; }
body.loaded .hero-content p { animation-delay: 0.5s; opacity: 0; }
body.loaded .hero-buttons { animation-delay: 0.7s; opacity: 0; }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loader-icon {
    font-size: 4rem;
    color: var(--primary-color);
    animation: pulse 1.5s ease-in-out infinite;
}

.loader-text {
    color: var(--bg-white);
    font-size: 1.1rem;
    animation: fadeIn 0.5s ease;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(245, 166, 35, 0.4); }
    50% { box-shadow: 0 0 40px rgba(245, 166, 35, 0.8); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(2.5); opacity: 0; }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: var(--shadow-md);
    transform: translateY(0);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary-color);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.02);
    transition: transform var(--transition-fast);
}

.logo-img {
    width: auto;
    height: 45px;
    max-width: 180px;
    border-radius: 8px;
    object-fit: contain;
}

.logo:hover .logo-img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links li {
    margin-left: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 8px 0;
    display: inline-flex;
    align-items: center;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
    animation: slideInLeft 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
    transition: width var(--transition-normal);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: transparent;
    outline: none;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.hero {
    padding: 120px 0 100px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    color: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(245, 166, 35, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 20% 80%, rgba(245, 166, 35, 0.1) 0%, transparent 40%),
                radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    box-shadow: 0 0 10px var(--primary-color);
}

.particle:nth-child(1) { top: 20%; left: 10%; animation: float 6s ease-in-out infinite; animation-delay: 0s; }
.particle:nth-child(2) { top: 40%; left: 80%; animation: float 8s ease-in-out infinite; animation-delay: 1s; }
.particle:nth-child(3) { top: 60%; left: 20%; animation: float 7s ease-in-out infinite; animation-delay: 2s; }
.particle:nth-child(4) { top: 80%; left: 60%; animation: float 5s ease-in-out infinite; animation-delay: 0.5s; }
.particle:nth-child(5) { top: 30%; left: 50%; animation: float 9s ease-in-out infinite; animation-delay: 3s; }

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    padding-right: 40px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    line-height: 1.2;
    font-weight: 700;
    background: linear-gradient(135deg, var(--bg-white), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(245, 166, 35, 0.3);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 35px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--secondary-color);
    box-shadow: 0 4px 15px rgba(245, 166, 35, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245, 166, 35, 0.5);
}

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

.btn-secondary:hover {
    background: var(--bg-white);
    color: var(--secondary-color);
    border-color: var(--bg-white);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.hero-scroll {
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    animation: bounce 2s ease-in-out infinite;
}

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

.hero-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
}

.hero-image-wrapper {
    position: relative;
}

.hero-img {
    max-width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s ease;
}

.hero-image-wrapper:hover .hero-img {
    transform: scale(1.02);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(245, 166, 35, 0.3) 0%, transparent 70%);
    border-radius: 24px;
    animation: glow 3s ease-in-out infinite;
}

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

.section-subtitle {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(245, 166, 35, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 16px;
    animation: fadeIn 0.5s ease;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--text-dark);
    font-weight: 700;
    position: relative;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 20px auto 0;
}

.about {
    padding: 100px 0;
    background: var(--bg-white);
}

.about-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 50px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 24px;
    color: var(--text-dark);
    font-weight: 600;
}

.about-text p {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.9;
}

.stats {
    display: flex;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.stat-item {
    flex: 1;
    min-width: 140px;
    text-align: center;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 20px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.stat-item:hover {
    transform: translateY(-5px);
    background: linear-gradient(135deg, rgba(245, 166, 35, 0.1), rgba(245, 166, 35, 0.05));
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    transition: transform var(--transition-fast);
}

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

.stat-icon i {
    font-size: 1.4rem;
    color: var(--bg-white);
}

.stat-number {
    display: block;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.about-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
}

.about-image-wrapper {
    position: relative;
}

.about-img {
    max-width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.5s ease;
}

.about-image-wrapper:hover .about-img {
    transform: scale(1.02);
}

.about-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(245, 166, 35, 0.1) 0%, transparent 50%);
    border-radius: 24px;
}

.services {
    padding: 100px 0;
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 28px;
}

.service-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(245, 166, 35, 0.05), transparent);
    transition: left var(--transition-slow);
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(245, 166, 35, 0.2);
}

.service-icon {
    width: 85px;
    height: 85px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-fast);
}

.service-card:hover .service-icon {
    transform: scale(1.05);
}

.service-icon i {
    font-size: 2.4rem;
    color: var(--bg-white);
    position: relative;
    z-index: 2;
}

.service-icon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon-glow {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--text-dark);
    font-weight: 600;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.8;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.service-link:hover {
    gap: 15px;
}

.cases {
    padding: 100px 0;
    background: var(--bg-white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.case-card {
    background: var(--bg-white);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    cursor: pointer;
    position: relative;
}

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

.case-image-wrapper {
    position: relative;
    height: 230px;
    overflow: hidden;
}

.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-overlay i {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1.2rem;
    transform: scale(0.8);
    transition: transform var(--transition-fast);
}

.case-card:hover .case-overlay i {
    transform: scale(1);
}

.case-info {
    padding: 24px;
}

.case-category {
    display: inline-block;
    padding: 5px 15px;
    background: rgba(245, 166, 35, 0.1);
    color: var(--primary-color);
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.case-info h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
}

.case-info p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 70%, rgba(245, 166, 35, 0.1) 0%, transparent 40%);
}

.contact .section-header h2,
.contact .section-header p {
    color: var(--bg-white);
}

.contact-content {
    display: flex;
    justify-content: space-between;
    gap: 50px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 32px;
    transition: transform var(--transition-fast);
}

.contact-item:hover {
    transform: translateX(5px);
}

.contact-icon {
    width: 55px;
    height: 55px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-right: 18px;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.contact-item:hover .contact-icon {
    background: rgba(245, 166, 35, 0.2);
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(245, 166, 35, 0.3);
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--bg-white);
}

.contact-item p {
    color: rgba(255, 255, 255, 0.8);
}

.contact-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.form-success {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 215, 96, 0.95);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.form-success.show {
    opacity: 1;
    visibility: visible;
}

.form-success i {
    font-size: 3rem;
    color: var(--bg-white);
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.form-success p {
    color: var(--bg-white);
    font-size: 1.1rem;
    text-align: center;
}

.form-group {
    margin-bottom: 22px;
    position: relative;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 14px;
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.05);
    color: var(--bg-white);
    transition: var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(245, 166, 35, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group select option {
    background: var(--secondary-color);
    color: var(--bg-white);
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

.form-error {
    position: absolute;
    bottom: -24px;
    left: 0;
    color: #ff6b6b;
    font-size: 0.85rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.form-error.show {
    opacity: 1;
    visibility: visible;
}

.contact-form button {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--secondary-color);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.contact-form button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.contact-form button:hover::before {
    width: 300px;
    height: 300px;
}

.contact-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 166, 35, 0.4);
}

.footer {
    background: var(--text-dark);
    color: var(--bg-white);
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 45px;
    margin-bottom: 45px;
}

.footer-section h4 {
    margin-bottom: 24px;
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 14px;
}

.footer-section ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-section p {
    color: var(--text-muted);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.footer-section p i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-section a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--bg-white);
    transition: var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(245, 166, 35, 0.4);
}

.social-links .wechat-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--transition-normal);
}

.social-links .wechat-qr:hover {
    transform: scale(1.05);
}

.social-links .qr-code {
    width: 100px;
    height: 100px;
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: var(--transition-normal);
}

.social-links .wechat-qr:hover .qr-code {
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(245, 166, 35, 0.3);
}

.social-links .qr-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

.social-links .wechat-qr:hover .qr-label {
    color: var(--primary-color);
}

.social-links .wechat-qr:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
    border-radius: 12px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.focus-visible:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(245, 166, 35, 0.5);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 50%;
    color: var(--secondary-color);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(245, 166, 35, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245, 166, 35, 0.5);
}

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

.back-to-top:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
}

@media (max-width: 768px) {
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        padding: 20px;
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        gap: 10px;
        animation: slideInDown 0.3s ease;
    }

    @keyframes slideInDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 0;
    }

    .hamburger {
        display: flex;
    }

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

    .hero-content {
        padding-right: 0;
        margin-bottom: 40px;
    }

    .hero-image-wrapper {
        width: 100%;
    }

    .hero-img {
        border-radius: 16px;
    }

    .stats {
        justify-content: center;
        gap: 15px;
    }

    .stat-item {
        min-width: 120px;
        padding: 20px 15px;
    }

    .stat-number {
        font-size: 2.2rem;
    }

    .contact-content {
        flex-direction: column;
    }

    .contact-form {
        padding: 30px;
    }

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 28px;
        font-size: 0.9rem;
    }

    .service-card,
    .case-card {
        padding: 25px;
    }

    .service-icon {
        width: 70px;
        height: 70px;
    }

    .service-icon i {
        font-size: 2rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}