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

/* 移动端视口修复 */
html {
    height: 100%;
    height: -webkit-fill-available;
}

body {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* 字体家族 - 大公司风格 */
    --font-display: 'Space Grotesk', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Poppins', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Poppins', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    font-weight: 400;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 性能优化 */
* {
    -webkit-tap-highlight-color: transparent;
}

/* 减少移动端重绘 */
@media (max-width: 768px) {
    * {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }
    
    /* 禁用移动端的悬停效果 */
    .advantage-card:hover,
    .service-card:hover,
    .partner-card:hover,
    .case-card:hover,
    .process-step:hover,
    .cert-badge:hover,
    .testimonial-card:hover,
    .ai-card:hover,
    .client-logo:hover {
        transform: none;
        box-shadow: inherit;
    }
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(180deg, rgba(10, 14, 39, 0.85) 0%, rgba(10, 14, 39, 0.7) 100%);
    backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 4px 30px rgba(37, 99, 235, 0.12), 
                inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(96, 165, 250, 0.2);
    margin: 0;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(96, 165, 250, 0.5) 50%, 
        transparent 100%);
    opacity: 0.6;
}

.navbar.scrolled {
    background: linear-gradient(180deg, rgba(10, 14, 39, 0.98) 0%, rgba(10, 14, 39, 0.95) 100%);
    backdrop-filter: blur(25px) saturate(200%);
    box-shadow: 0 8px 40px rgba(37, 99, 235, 0.25), 
                0 2px 10px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(96, 165, 250, 0.35);
}

.navbar.scrolled::before {
    opacity: 1;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 20px;
    max-width: 1400px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    font-family: var(--font-display);
    letter-spacing: -0.02em;
    transition: all 0.3s ease;
    cursor: pointer;
}

.logo-text-wrapper {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text-main {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-heading);
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, #ffffff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 12px rgba(96, 165, 250, 0.3);
}

.logo-text-sub {
    font-size: 0.65rem;
    font-weight: 400;
    font-family: var(--font-body);
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 2px;
}

.navbar.scrolled .logo {
    color: rgba(255, 255, 255, 1);
    text-shadow: 0 2px 15px rgba(96, 165, 250, 0.5);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo:hover .logo-text-main {
    background: linear-gradient(135deg, #ffffff, #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo:hover .logo-text-sub {
    color: rgba(255, 255, 255, 0.8);
}

.logo-img {
    height: 45px;
    width: auto;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.logo:hover .logo-img {
    filter: drop-shadow(0 4px 12px rgba(96, 165, 250, 0.6));
    transform: scale(1.02);
}

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

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: var(--font-heading);
    letter-spacing: -0.01em;
    font-size: 0.95rem;
    padding: 0.5rem 0.8rem;
    position: relative;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    border-radius: 8px;
}

.navbar.scrolled .nav-menu a {
    color: rgba(255, 255, 255, 1);
}

.nav-menu a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #60a5fa, #a78bfa);
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(96, 165, 250, 0.8);
    border-radius: 2px;
}

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

.nav-menu a:hover {
    color: #93c5fd;
    text-shadow: 0 0 20px rgba(147, 197, 253, 0.8), 0 2px 8px rgba(0, 0, 0, 0.4);
    transform: translateY(-1px);
}

.nav-menu a:hover::after {
    width: 80%;
}

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

.language-switcher {
    display: flex;
    gap: 0.3rem;
    margin-left: 2rem;
    padding-left: 2rem;
    border-left: 1px solid rgba(96, 165, 250, 0.2);
}

.lang-btn {
    padding: 0.4rem 0.9rem;
    background: transparent;
    border: 1px solid rgba(147, 197, 253, 0.25);
    color: rgba(255, 255, 255, 0.7);
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    color: rgba(255, 255, 255, 0.95);
    border-color: rgba(147, 197, 253, 0.5);
    background: rgba(96, 165, 250, 0.1);
}

.lang-btn.active {
    background: rgba(96, 165, 250, 0.15);
    color: rgba(255, 255, 255, 0.95);
    border-color: rgba(147, 197, 253, 0.4);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    margin-left: 1rem;
    padding: 0.5rem;
    transition: transform 0.3s ease;
}

.hamburger:hover {
    transform: scale(1.1);
}

.hamburger:hover {
    transform: scale(1.1);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: rgba(255, 255, 255, 0.9);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.navbar.scrolled .hamburger span {
    background: rgba(255, 255, 255, 0.95);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* 英雄区域 */
.hero {
    background: #0a0e27;
    color: var(--white);
    padding: 150px 0 150px;
    padding-top: calc(70px + 80px); /* 导航栏高度 + 额外空间 */
    text-align: center;
    margin-top: 0;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    /* 移动端性能优化 */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000;
    perspective: 1000;
    transform: translateZ(0);
}

/* 多层动态渐变背景 */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.5) 0%, transparent 35%),
        radial-gradient(circle at 80% 70%, rgba(147, 51, 234, 0.4) 0%, transparent 35%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 90% 20%, rgba(236, 72, 153, 0.3) 0%, transparent 30%),
        radial-gradient(circle at 10% 80%, rgba(124, 58, 237, 0.35) 0%, transparent 35%);
    animation: gradientShift 20s ease-in-out infinite;
    pointer-events: none;
    filter: blur(40px);
    will-change: transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
        opacity: 1;
    }
    25% {
        transform: translate(8%, 5%) rotate(90deg) scale(1.1);
        opacity: 0.9;
    }
    50% {
        transform: translate(-5%, 8%) rotate(180deg) scale(1.05);
        opacity: 0.95;
    }
    75% {
        transform: translate(-8%, -5%) rotate(270deg) scale(1.08);
        opacity: 0.92;
    }
}

/* 3D网格背景 */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(96, 165, 250, 0.15) 2px, transparent 2px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.15) 2px, transparent 2px),
        linear-gradient(rgba(147, 197, 253, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(147, 197, 253, 0.08) 1px, transparent 1px);
    background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
    animation: gridMove 30s linear infinite, gridPulse 4s ease-in-out infinite;
    pointer-events: none;
    opacity: 0.4;
    perspective: 1000px;
    transform-style: preserve-3d;
    will-change: transform, opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0) rotateX(0deg);
    }
    100% {
        transform: translate(100px, 100px) rotateX(360deg);
    }
}

@keyframes gridPulse {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.6;
    }
}

/* 移动端优化 - 简化动画 */
@media (max-width: 768px) {
    .hero {
        min-height: 100vh;
        min-height: -webkit-fill-available;
        padding: 120px 20px 80px;
        margin-top: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .hero .container {
        width: 100%;
    }
    
    .hero::before {
        animation: gradientShiftMobile 25s ease-in-out infinite;
        filter: blur(30px);
    }
    
    .hero::after {
        animation: gridMoveMobile 40s linear infinite;
        background-size: 80px 80px, 80px 80px, 20px 20px, 20px 20px;
        opacity: 0.3;
    }
    
    @keyframes gradientShiftMobile {
        0%, 100% {
            transform: translate(0, 0) scale(1);
            opacity: 0.9;
        }
        50% {
            transform: translate(5%, 5%) scale(1.05);
            opacity: 0.85;
        }
    }
    
    @keyframes gridMoveMobile {
        0% {
            transform: translate(0, 0);
        }
        100% {
            transform: translate(80px, 80px);
        }
    }
}

/* 光束效果 */
.hero-beams {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

.beam {
    position: absolute;
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        rgba(96, 165, 250, 0.9) 30%,
        rgba(147, 197, 253, 1) 50%, 
        rgba(96, 165, 250, 0.9) 70%,
        transparent 100%);
    animation: beamMove 10s linear infinite;
    opacity: 0;
    box-shadow: 0 0 20px rgba(96, 165, 250, 0.8),
                0 0 40px rgba(96, 165, 250, 0.5),
                0 0 60px rgba(96, 165, 250, 0.3);
    filter: blur(1px);
    will-change: transform, opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.beam:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 8s;
}

.beam:nth-child(2) {
    left: 30%;
    animation-delay: 2s;
    animation-duration: 10s;
}

.beam:nth-child(3) {
    left: 50%;
    animation-delay: 4s;
    animation-duration: 9s;
}

.beam:nth-child(4) {
    left: 70%;
    animation-delay: 6s;
    animation-duration: 11s;
}

.beam:nth-child(5) {
    left: 90%;
    animation-delay: 1s;
    animation-duration: 7s;
}

.beam:nth-child(6) {
    left: 15%;
    animation-delay: 3.5s;
    animation-duration: 9.5s;
}

.beam:nth-child(7) {
    left: 65%;
    animation-delay: 5.5s;
    animation-duration: 8.5s;
}

.beam:nth-child(8) {
    left: 40%;
    animation-delay: 7s;
    animation-duration: 10.5s;
}

@keyframes beamMove {
    0% {
        transform: translateY(-100%) scaleY(0.5);
        opacity: 0;
    }
    5% {
        opacity: 1;
    }
    50% {
        transform: translateY(0%) scaleY(1);
        opacity: 1;
    }
    95% {
        opacity: 1;
    }
    100% {
        transform: translateY(100%) scaleY(0.5);
        opacity: 0;
    }
}

/* 移动端优化 - 减少光束数量和效果 */
@media (max-width: 768px) {
    .beam {
        width: 2px;
        box-shadow: 0 0 10px rgba(96, 165, 250, 0.6);
        filter: blur(0.5px);
    }
    
    .beam:nth-child(n+5) {
        display: none; /* 隐藏额外的光束 */
    }
}

/* 浮动圆圈装饰 */
.hero-circles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

.circle {
    position: absolute;
    border-radius: 50%;
    border: 3px solid rgba(96, 165, 250, 0.4);
    animation: float 25s ease-in-out infinite;
    box-shadow: 
        0 0 30px rgba(96, 165, 250, 0.3),
        inset 0 0 30px rgba(96, 165, 250, 0.2);
    background: radial-gradient(circle at 30% 30%, 
        rgba(96, 165, 250, 0.1) 0%, 
        transparent 70%);
    will-change: transform, opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.circle::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 10%;
    right: 10%;
    bottom: 10%;
    border-radius: 50%;
    border: 2px solid rgba(147, 197, 253, 0.3);
    animation: rotate 15s linear infinite;
}

.circle:nth-child(1) {
    width: 350px;
    height: 350px;
    top: 5%;
    left: 5%;
    animation-delay: 0s;
    animation-duration: 20s;
}

.circle:nth-child(2) {
    width: 250px;
    height: 250px;
    top: 55%;
    right: 8%;
    animation-delay: 4s;
    animation-duration: 25s;
}

.circle:nth-child(3) {
    width: 180px;
    height: 180px;
    top: 25%;
    right: 18%;
    animation-delay: 8s;
    animation-duration: 22s;
}

.circle:nth-child(4) {
    width: 280px;
    height: 280px;
    bottom: 8%;
    left: 12%;
    animation-delay: 12s;
    animation-duration: 28s;
}

.circle:nth-child(5) {
    width: 200px;
    height: 200px;
    top: 40%;
    left: 50%;
    animation-delay: 6s;
    animation-duration: 24s;
}

.circle:nth-child(6) {
    width: 150px;
    height: 150px;
    bottom: 20%;
    right: 25%;
    animation-delay: 10s;
    animation-duration: 26s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1) rotate(0deg);
        opacity: 0.4;
        border-color: rgba(96, 165, 250, 0.4);
    }
    25% {
        transform: translate(40px, -40px) scale(1.15) rotate(90deg);
        opacity: 0.7;
        border-color: rgba(147, 197, 253, 0.6);
    }
    50% {
        transform: translate(-30px, 30px) scale(0.95) rotate(180deg);
        opacity: 0.5;
        border-color: rgba(124, 58, 237, 0.5);
    }
    75% {
        transform: translate(35px, 35px) scale(1.1) rotate(270deg);
        opacity: 0.6;
        border-color: rgba(236, 72, 153, 0.5);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 移动端优化 - 简化圆圈动画 */
@media (max-width: 768px) {
    .circle {
        border-width: 2px;
        box-shadow: 0 0 15px rgba(96, 165, 250, 0.2);
    }
    
    .circle::before {
        display: none; /* 移除内圈旋转 */
    }
    
    .circle:nth-child(n+4) {
        display: none; /* 只保留3个圆圈 */
    }
    
    @keyframes float {
        0%, 100% {
            transform: translate(0, 0) scale(1);
            opacity: 0.3;
        }
        50% {
            transform: translate(20px, -20px) scale(1.05);
            opacity: 0.5;
        }
    }
}

/* 星星闪烁效果 */
.hero-stars {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 2;
}

.star {
    position: absolute;
    width: 3px;
    height: 3px;
    background: white;
    border-radius: 50%;
    animation: twinkle 4s ease-in-out infinite;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.8),
                0 0 12px rgba(147, 197, 253, 0.6);
    will-change: opacity, transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
        box-shadow: 0 0 6px rgba(255, 255, 255, 0.8),
                    0 0 12px rgba(147, 197, 253, 0.6);
    }
    50% {
        opacity: 1;
        transform: scale(1.8);
        box-shadow: 0 0 12px rgba(255, 255, 255, 1),
                    0 0 24px rgba(147, 197, 253, 0.9),
                    0 0 36px rgba(96, 165, 250, 0.6);
    }
}

/* 移动端优化 - 减少星星效果 */
@media (max-width: 768px) {
    .star {
        width: 2px;
        height: 2px;
        box-shadow: 0 0 4px rgba(255, 255, 255, 0.6);
    }
    
    @keyframes twinkle {
        0%, 100% {
            opacity: 0.2;
            transform: scale(1);
        }
        50% {
            opacity: 0.8;
            transform: scale(1.3);
        }
    }
}

.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

/* 移动端优化 - 禁用粒子效果 */
@media (max-width: 768px) {
    .particle-canvas {
        display: none;
    }
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
    position: relative;
    z-index: 10;
    text-shadow: 0 0 20px rgba(37, 99, 235, 0.5),
                 0 0 40px rgba(37, 99, 235, 0.3);
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.35rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
    position: relative;
    z-index: 10;
    text-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.5;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 1s ease 0.4s backwards;
    position: relative;
    z-index: 10;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4),
                0 0 20px rgba(124, 58, 237, 0.3);
    font-family: var(--font-heading);
    letter-spacing: -0.01em;
    font-size: 1.05rem;
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.6),
                0 0 30px rgba(124, 58, 237, 0.5);
}

/* 通用区域样式 */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.75rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #7c3aed);
    margin: 1rem auto 0;
    border-radius: 2px;
}

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

.about-content {
    max-width: 1000px;
    margin: 0 auto 3rem;
}

.about-text {
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: -0.01em;
    margin-bottom: 1.5rem;
}

.about-main {
    font-size: 1.25rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.8;
}

.about-main .highlight {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.35rem;
    position: relative;
    padding: 0 0.3rem;
    letter-spacing: -0.02em;
}

.about-main .highlight::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, #7c3aed);
    opacity: 0.3;
    border-radius: 2px;
}

.about-secondary {
    font-size: 1.05rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.about-feature {
    text-align: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #faf5ff 100%);
    border-radius: 15px;
    border: 2px solid rgba(37, 99, 235, 0.1);
    transition: all 0.4s ease;
}

.about-feature:hover {
    transform: translateY(-5px);
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    transition: transform 0.4s ease;
}

.about-feature:hover .feature-icon {
    transform: scale(1.2) rotate(5deg);
}

.about-feature h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.about-feature p {
    color: var(--text-light);
    font-size: 0.95rem;
    font-family: var(--font-body);
    line-height: 1.5;
    letter-spacing: -0.01em;
}

/* 优势区域 */
.advantages {
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.advantage-card .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    transition: all 0.4s ease;
    filter: drop-shadow(0 4px 12px rgba(37, 99, 235, 0.2));
}

.advantage-card:hover .icon {
    transform: scale(1.1) translateY(-5px);
    filter: drop-shadow(0 8px 20px rgba(37, 99, 235, 0.4));
}

.advantage-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.advantage-card p {
    color: var(--text-light);
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* 服务区域 */
.services {
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--white);
}

.service-card:hover::after {
    opacity: 1;
}

.service-card .icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    color: var(--primary-color);
    position: relative;
    z-index: 1;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    position: relative;
    z-index: 1;
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.6;
    position: relative;
    z-index: 1;
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* 合作伙伴 */
.partners {
    background: var(--bg-light);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.partner-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.partner-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

.partner-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 10px;
    padding: 10px;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.partner-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: 1px;
}

.partner-card p {
    color: var(--text-light);
    line-height: 1.6;
    text-align: center;
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* 联系我们 */
.contact {
    background: #0a0e27;
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 400px;
}

/* 动态渐变背景 */
.contact::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 70% 60%, rgba(147, 51, 234, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
    pointer-events: none;
}

/* 网格背景 */
.contact::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(96, 165, 250, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    pointer-events: none;
    opacity: 0.3;
}

.contact .container {
    position: relative;
    z-index: 1;
}

/* 联系我们区域的浮动圆圈 */
.contact-circles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.contact-circles .circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid rgba(96, 165, 250, 0.3);
    animation: float 20s ease-in-out infinite;
}

.contact-circles .circle:nth-child(1) {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.contact-circles .circle:nth-child(2) {
    width: 150px;
    height: 150px;
    top: 50%;
    right: 15%;
    animation-delay: 3s;
}

.contact-circles .circle:nth-child(3) {
    width: 180px;
    height: 180px;
    bottom: 15%;
    left: 20%;
    animation-delay: 6s;
}

/* 联系我们区域的星星 */
.contact-stars {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.contact .section-title {
    color: var(--white);
}

.contact .section-title::after {
    background: linear-gradient(90deg, var(--white), rgba(255, 255, 255, 0.5));
}

.contact-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-family: var(--font-body);
    font-weight: 300;
    letter-spacing: 0.5px;
}

.contact .cta-button {
    background: var(--white);
    color: var(--primary-color);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 3rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-brand h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
}

.footer-brand p {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.footer-copyright {
    font-family: var(--font-body);
    font-weight: 300;
    letter-spacing: 0.02em;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* 服务客户 */
.clients {
    background: var(--white);
    padding: 80px 0;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2.5rem;
    align-items: center;
    justify-items: center;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
    border-radius: 15px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 120px;
    width: 100%;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.client-logo::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 15px;
    padding: 2px;
    background: linear-gradient(135deg, #60a5fa, #a78bfa, #ec4899);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.client-logo::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.client-logo:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.2),
                0 5px 15px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
}

.client-logo:hover::before {
    opacity: 1;
}

.client-logo:hover::after {
    opacity: 1;
    animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.logo-placeholder {
    color: var(--text-light);
    font-size: 0.9rem;
    text-align: center;
    opacity: 0.6;
}

.client-logo img {
    max-width: 140px;
    max-height: 70px;
    object-fit: contain;
    filter: grayscale(100%) brightness(0.8) contrast(1.2);
    opacity: 0.7;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.client-logo:hover img {
    filter: grayscale(0%) brightness(1) contrast(1);
    opacity: 1;
    transform: scale(1.1);
}

.client-logo-svg {
    width: 140px;
    height: 70px;
    filter: grayscale(100%) brightness(0.8) contrast(1.2);
    opacity: 0.7;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.client-logo:hover .client-logo-svg {
    filter: grayscale(0%) brightness(1) contrast(1);
    opacity: 1;
    transform: scale(1.1);
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--text-dark);
    opacity: 0.6;
    transition: all 0.4s ease;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.client-logo:hover .logo-text {
    opacity: 1;
    transform: scale(1.1);
    text-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

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

/* 数据展示 */
.stats {
    background: linear-gradient(135deg, #0a0e27 0%, #1e293b 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(96, 165, 250, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    color: var(--white);
    padding: 2rem;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(96, 165, 250, 0.2);
    transition: all 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(96, 165, 250, 0.4);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.3);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 2rem;
    font-weight: 700;
    color: #93c5fd;
    font-family: var(--font-display);
    letter-spacing: -0.02em;
}

.stat-card p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 0.5rem;
    font-family: var(--font-body);
    letter-spacing: -0.01em;
}

/* AI技术能力 */
.ai-capabilities {
    background: var(--white);
    padding: 80px 0;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-top: -2rem;
    margin-bottom: 3rem;
    font-family: var(--font-body);
    font-weight: 400;
    letter-spacing: -0.01em;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.ai-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2.5rem;
    border-radius: 15px;
    border: 2px solid rgba(37, 99, 235, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.ai-card:hover::before {
    opacity: 1;
    animation: shimmer 2s ease-in-out infinite;
}

.ai-card:hover {
    transform: translateY(-10px);
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.2);
}

.ai-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: transform 0.4s ease;
}

.ai-card:hover .ai-icon {
    transform: scale(1.2) rotate(5deg);
}

.ai-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.ai-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-family: var(--font-body);
    position: relative;
    z-index: 1;
}

/* 成功案例 */
.case-studies {
    background: var(--bg-light);
    padding: 80px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.case-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border-top: 4px solid var(--primary-color);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.2);
}

.case-category {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: linear-gradient(135deg, #dbeafe, #e0e7ff);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    font-family: var(--font-heading);
}

.case-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 700;
}

.case-card > p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-family: var(--font-body);
}

.case-result {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff, #faf5ff);
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.result-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
    margin-bottom: 0.5rem;
}

.result-label {
    display: block;
    color: var(--text-light);
    font-size: 1rem;
    font-family: var(--font-body);
}

.case-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.metric-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.metric-item span {
    display: block;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
    font-family: var(--font-body);
}

.metric-item strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary-color);
    font-family: var(--font-display);
    font-weight: 700;
}

/* 服务流程 */
.process {
    background: var(--white);
    padding: 80px 0;
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    position: relative;
}

.process-step {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    position: relative;
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.process-step:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
    background: var(--white);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 20px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
    font-family: var(--font-display);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.process-step h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 700;
}

.process-step p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-family: var(--font-body);
}

.step-deliverable {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #dbeafe, #e0e7ff);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-heading);
}

/* 资质认证 */
.certifications {
    background: var(--bg-light);
    padding: 80px 0;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.cert-badge {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.cert-badge:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.2);
}

.badge-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    transition: transform 0.4s ease;
}

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

.cert-badge h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 700;
}

.cert-badge p {
    color: var(--text-light);
    font-size: 0.95rem;
    font-family: var(--font-body);
}

/* 客户评价 */
.testimonials {
    background: var(--white);
    padding: 80px 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 15px;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.quote-icon {
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.2;
    line-height: 1;
    font-family: Georgia, serif;
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--text-dark);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-family: var(--font-body);
    font-style: italic;
}

.testimonial-author {
    border-top: 2px solid rgba(37, 99, 235, 0.2);
    padding-top: 1rem;
}

.testimonial-author strong {
    display: block;
    color: var(--text-dark);
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    font-family: var(--font-heading);
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 0.9rem;
    font-family: var(--font-body);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
        gap: 0;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-menu li {
        width: 100%;
        padding: 0.8rem 0;
        border-bottom: 1px solid rgba(37, 99, 235, 0.1);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu a {
        display: block;
        padding: 0.5rem 2rem;
        font-size: 1.1rem;
    }
    
    .nav-menu a::after {
        display: none;
    }

    .nav-menu.active {
        left: 0;
    }
    
    .language-switcher {
        position: fixed;
        top: 16px;
        right: 70px;
        z-index: 1001;
        margin: 0;
        padding: 0;
        border: none;
        gap: 0.25rem;
    }
    
    .lang-btn {
        padding: 0.35rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .navbar .container {
        padding: 0.8rem 20px;
    }
    
    .logo-text-main {
        font-size: 1.15rem;
    }
    
    .logo-text-sub {
        font-size: 0.6rem;
    }

    .hero-title {
        font-size: 2.25rem;
        letter-spacing: -0.02em;
    }

    .hero-subtitle {
        font-size: 1.15rem;
        letter-spacing: -0.01em;
    }

    .section-title {
        font-size: 2rem;
        letter-spacing: -0.02em;
    }

    .advantages-grid,
    .services-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .client-logo {
        padding: 1.5rem 1rem;
        min-height: 100px;
    }
    
    .client-logo img,
    .client-logo-svg {
        max-width: 100px;
        max-height: 50px;
        width: 100px;
        height: 50px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .stat-label {
        font-size: 1.5rem;
    }
    
    .ai-grid,
    .cases-grid,
    .process-timeline,
    .cert-grid,
    .testimonials-grid,
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-main {
        font-size: 1.1rem;
    }
    
    .about-main .highlight {
        font-size: 1.15rem;
    }
    
    .about-secondary {
        font-size: 1rem;
    }
    
    .case-metrics {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 15px 60px;
    }
    
    .hero-title {
        font-size: 1.75rem;
        letter-spacing: -0.02em;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1rem;
        letter-spacing: 0;
        line-height: 1.5;
    }

    .cta-button {
        padding: 0.8rem 2rem;
        font-size: 0.95rem;
    }
    
    .section-title {
        font-size: 1.75rem;
        letter-spacing: -0.02em;
    }
    
    .navbar .container {
        padding: 0.7rem 15px;
    }
    
    .logo-text-main {
        font-size: 1rem;
    }
    
    .logo-text-sub {
        font-size: 0.55rem;
    }
    
    .footer-brand h3 {
        font-size: 1.3rem;
    }
    
    .footer-brand p {
        font-size: 0.85rem;
    }
}