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

:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --primary-dark: #4338ca;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-3xl: 0 50px 100px -20px rgb(0 0 0 / 0.3);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    line-height: 1.8;
    color: var(--gray-700);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 48px;
}

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

ul {
    list-style: none;
}

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

.section-padding {
    padding: 160px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(16, 185, 129, 0.08));
    border: 1px solid rgba(79, 70, 229, 0.15);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.5;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-500);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 36px;
    border-radius: 16px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: 0 4px 14px -4px rgba(79, 70, 229, 0.5);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px -8px rgba(79, 70, 229, 0.6);
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-primary:hover::after {
    opacity: 1;
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.btn-glow {
    background: linear-gradient(135deg, var(--secondary), #059669);
    color: white;
    box-shadow: 0 4px 14px -4px rgba(16, 185, 129, 0.5);
}

.btn-glow:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px -8px rgba(16, 185, 129, 0.6);
}

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

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
    transition: all var(--transition);
}

.logo-icon:hover {
    transform: rotate(10deg) scale(1.1);
}

.logo-text {
    font-size: 1.625rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gray-900), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 12px 24px;
    color: var(--gray-600);
    font-weight: 500;
    border-radius: 12px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(16, 185, 129, 0.08));
    border-radius: 12px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-links a:hover {
    color: var(--gray-900);
}

.nav-links a:hover::before {
    opacity: 1;
}

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

.nav-links a.active::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(16, 185, 129, 0.1));
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: 12px;
    cursor: pointer;
    padding: 14px;
    transition: all var(--transition);
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition);
}

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

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

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

/* 首页横幅 */
.hero {
    min-height: 100vh;
    background: linear-gradient(160deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    padding: 120px 24px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(79, 70, 229, 0.3), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(16, 185, 129, 0.2), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(245, 158, 11, 0.15), transparent);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
    50% { transform: translateY(-30px) scale(1.2); opacity: 0.6; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1000px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    color: white;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-badge i {
    color: var(--secondary);
}

.hero-content h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 28px;
    letter-spacing: -0.03em;
    animation: fadeInUp 0.8s ease 0.1s forwards;
    opacity: 0;
}

.hero-content h1 span {
    background: linear-gradient(135deg, #a5b4fc, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content > p {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 80px;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, white, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    font-weight: 500;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 关于我们 */
.about {
    padding: 160px 0;
    background: var(--white);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.about-images {
    position: relative;
}

.about-main-image {
    width: 100%;
    height: 600px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 6rem;
    font-weight: 800;
    box-shadow: var(--shadow-3xl);
    position: relative;
    overflow: hidden;
}

.about-main-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.about-badge {
    position: absolute;
    bottom: 40px;
    right: -30px;
    background: var(--white);
    padding: 28px 36px;
    border-radius: 24px;
    box-shadow: var(--shadow-2xl);
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

.about-badge-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-badge-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 600;
    margin-top: 4px;
}

.about-content {
    padding-left: 20px;
}

.about-content .section-label {
    justify-content: center;
}

.about-content .section-title {
    text-align: center;
    font-size: 2.75rem;
    margin-bottom: 28px;
}

.about-content .section-subtitle {
    margin-bottom: 48px;
}

.about-intro {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.9;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 48px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 24px;
    background: var(--gray-50);
    border-radius: 20px;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.about-feature:hover {
    background: var(--white);
    border-color: var(--gray-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.about-feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    transition: all var(--transition);
}

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

.about-feature-text h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.about-feature-text p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin: 0;
    line-height: 1.6;
}

.about-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 服务项目 */
.services {
    padding: 160px 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--white);
    border-radius: 32px;
    padding: 40px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--gray-100);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform var(--transition);
}

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

.service-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-2xl);
}

.service-card-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 28px;
}

.service-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
    transition: all var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(8deg);
    box-shadow: 0 12px 32px rgba(79, 70, 229, 0.4);
}

.service-card-title {
    flex: 1;
    padding-top: 8px;
}

.service-card-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.service-card-title .tag {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(16, 185, 129, 0.1));
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}

.service-card > p {
    color: var(--gray-600);
    margin-bottom: 28px;
    line-height: 1.8;
    font-size: 1rem;
}

.service-features {
    margin-bottom: 32px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.95rem;
}

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

.service-features li i {
    width: 26px;
    height: 26px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.service-card-btn {
    width: 100%;
    padding: 16px;
    background: var(--gray-50);
    border: 2px solid var(--gray-100);
    border-radius: 16px;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

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

.service-card-btn i {
    transition: transform var(--transition-fast);
}

.service-card-btn:hover i {
    transform: translateX(6px);
}

/* 核心优势 */
.advantages {
    padding: 160px 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.advantages-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1200px;
    height: 1200px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
}

.advantage-card {
    text-align: center;
    padding: 48px 32px;
    background: var(--white);
    border-radius: 32px;
    border: 1px solid var(--gray-100);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity var(--transition);
}

.advantage-card:hover::before {
    opacity: 0.03;
}

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

.advantage-icon {
    width: 96px;
    height: 96px;
    margin: 0 auto 28px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(16, 185, 129, 0.1));
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition);
}

.advantage-icon::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 32px;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition);
}

.advantage-card:hover .advantage-icon::before {
    opacity: 1;
}

.advantage-icon i {
    font-size: 2.5rem;
    color: var(--primary);
    transition: all var(--transition);
}

.advantage-card:hover .advantage-icon i {
    color: var(--primary-dark);
}

.advantage-card h4 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.advantage-card p {
    color: var(--gray-500);
    font-size: 1rem;
    line-height: 1.7;
}

/* 联系我们 */
.contact {
    padding: 160px 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 50%, var(--gray-50) 100%);
    position: relative;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 60px;
    align-items: stretch;
}

.contact-info {
    padding: 56px;
    background: linear-gradient(145deg, var(--primary), var(--primary-dark));
    border-radius: 32px;
    color: white;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.contact-info::before {
    content: '';
    position: absolute;
    top: -150px;
    right: -150px;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.contact-info::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.contact-info > p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    position: relative;
    font-size: 1.05rem;
}

.contact-items {
    flex: 1;
    position: relative;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.375rem;
    flex-shrink: 0;
    transition: all var(--transition);
}

.contact-item:hover .contact-item-icon {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.08);
}

.contact-item-content h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-item-content p {
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
}

.contact-social {
    margin-top: auto;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    position: relative;
}

.contact-social h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.social-links {
    display: flex;
    gap: 14px;
}

.social-links a {
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    transition: all var(--transition);
}

.social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-6px);
}

.contact-form-wrapper {
    background: var(--white);
    border-radius: 32px;
    padding: 56px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-100);
}

.contact-form-wrapper h3 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.contact-form-wrapper > p {
    color: var(--gray-500);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.contact-form {
    display: grid;
    gap: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 10px;
}

.form-group label .required {
    color: #ef4444;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 18px 24px;
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    font-size: 1rem;
    transition: all var(--transition-fast);
    font-family: inherit;
    background: var(--gray-50);
    color: var(--gray-700);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 6px rgba(79, 70, 229, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group textarea {
    resize: vertical;
    min-height: 160px;
}

.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='%236b7280' 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 16px center;
    background-size: 20px;
    padding-right: 48px;
}

.contact-form .btn {
    padding: 20px 40px;
    font-size: 1.1rem;
    margin-top: 12px;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    color: white;
    padding: 100px 0 0;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 28px;
}

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

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.9;
    margin-bottom: 32px;
    font-size: 1rem;
}

.footer-brand-stats {
    display: flex;
    gap: 40px;
}

.footer-brand-stat {
    text-align: center;
}

.footer-brand-stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #a5b4fc, var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand-stat-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 28px;
    color: white;
}

.footer-section ul li {
    margin-bottom: 16px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.6);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.footer-section ul li a:hover {
    color: white;
    transform: translateX(6px);
}

.footer-section ul li a i {
    font-size: 0.75rem;
    opacity: 0;
    transition: all var(--transition);
}

.footer-section ul li a:hover i {
    opacity: 1;
}

.footer-bottom {
    padding: 32px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: white;
}

.footer-bottom-links {
    display: flex;
    gap: 32px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-bottom-links a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 1280px) {
    .container {
        max-width: 1024px;
        padding: 0 32px;
    }

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

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

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

@media (max-width: 992px) {
    .section-padding {
        padding: 120px 0;
    }

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

    .about-images {
        order: -1;
    }

    .about-main-image {
        height: 450px;
    }

    .about-badge {
        right: 20px;
        bottom: -20px;
        padding: 20px 28px;
    }

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

    .contact-info {
        padding: 48px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .nav-links {
        position: fixed;
        top: 100px;
        left: 20px;
        right: 20px;
        background: var(--white);
        flex-direction: column;
        padding: 28px;
        gap: 8px;
        box-shadow: var(--shadow-2xl);
        border-radius: 24px;
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links a {
        width: 100%;
        text-align: center;
        padding: 16px;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 140px 20px 100px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }

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

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

    .about-features {
        grid-template-columns: 1fr;
    }

    .about-cta {
        flex-direction: column;
    }

    .about-cta .btn {
        width: 100%;
    }

    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand .logo {
        justify-content: center;
    }

    .footer-brand-stats {
        justify-content: center;
    }

    .footer-section ul li a {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .contact-form-wrapper {
        padding: 40px 28px;
    }

    .contact-info {
        padding: 40px 28px;
    }
}