/* ====================
   基础设置和变量
   ==================== */
:root {
    /* 主色调 - 专业蓝色系 */
    --primary-color: #0d47a1;
    --primary-dark: #0a3d91;
    --primary-light: #1565c0;
    --primary-lighter: #42a5f5;
    
    /* 辅助色 - 金色强调 */
    --accent-color: #ff6f00;
    --accent-light: #ff8f00;
    --accent-gold: #ffa000;
    
    /* 次要色 */
    --success-color: #2e7d32;
    --warning-color: #f57f17;
    --danger-color: #c62828;
    
    /* 中性色 */
    --text-primary: #1a1a1a;
    --text-secondary: #37474f;
    --text-light: #546e7a;
    --text-muted: #90a4ae;
    
    /* 背景色 */
    --bg-white: #ffffff;
    --bg-light: #fafbfc;
    --bg-lighter: #f1f3f5;
    --bg-dark: #0a1929;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #0d47a1 0%, #1565c0 50%, #42a5f5 100%);
    --gradient-dark: linear-gradient(135deg, #0a3d91 0%, #0d47a1 100%);
    --gradient-gold: linear-gradient(135deg, #ff6f00 0%, #ff8f00 50%, #ffa000 100%);
    --gradient-hero: linear-gradient(135deg, rgba(13, 71, 161, 0.95) 0%, rgba(21, 101, 192, 0.9) 50%, rgba(66, 165, 245, 0.85) 100%);
    --gradient-card: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
    --gradient-hover: linear-gradient(135deg, rgba(13, 71, 161, 0.05) 0%, rgba(21, 101, 192, 0.02) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-colored: 0 8px 32px rgba(13, 71, 161, 0.2);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
    
    /* 过渡 */
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

/* ====================
   通用工具类
   ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: white;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 15px;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ====================
   按钮样式
   ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 16px;
    font-weight: 700;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.btn:hover::before {
    opacity: 0.1;
}

.btn-lg {
    padding: 20px 48px;
    font-size: 18px;
    font-weight: 800;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 24px rgba(13, 71, 161, 0.3);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(13, 71, 161, 0.4);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(13, 71, 161, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 3px solid var(--primary-color);
    font-weight: 700;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(13, 71, 161, 0.25);
}

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

.btn-gold {
    background: var(--gradient-gold);
    color: white;
    box-shadow: 0 8px 24px rgba(255, 111, 0, 0.3);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(255, 111, 0, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ====================
   顶部导航
   ==================== */
.top-bar {
    background: var(--primary-dark);
    color: white;
    padding: 12px 0;
    font-size: 14px;
}

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

.top-bar-left {
    display: flex;
    gap: 30px;
}

.top-bar-left span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.phone-link {
    color: white;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--accent-color);
    border-radius: 50px;
    transition: var(--transition);
}

.phone-link:hover {
    background: var(--accent-light);
    transform: scale(1.05);
}

.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-mark {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-text-1 {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary-color);
}

.logo-text-2 {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.logo-tagline {
    padding: 4px 12px;
    background: var(--gradient-gold);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
}

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

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 10px 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

.nav-btn {
    padding: 12px 28px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50px;
    font-weight: 600;
}

.nav-btn:hover {
    background: var(--gradient-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 86, 179, 0.3);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* ====================
   Hero区域
   ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-image-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://images.unsplash.com/photo-1556911220-e15b29be8c8f?w=1920');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    animation: heroImageMove 30s linear infinite;
}

@keyframes heroImageMove {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.hero-gradient-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: patternFloat 8s ease-in-out infinite;
}

@keyframes patternFloat {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 120px 0 80px;
}

.hero-badges {
    display: flex;
    gap: 15px;
    margin-bottom: 35px;
    animation: badgesFadeIn 1s ease-out 0.3s both;
}

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

.badge-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 15px;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.badge-primary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.badge-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--gradient-gold);
    color: white;
    font-size: 15px;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 8px 24px rgba(255, 111, 0, 0.3);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.badge-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition);
}

.badge-secondary:hover::before {
    left: 100%;
}

.badge-secondary:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 12px 32px rgba(255, 111, 0, 0.4);
}

.hero-title {
    font-size: 64px;
    font-weight: 900;
    color: white;
    line-height: 1.1;
    margin-bottom: 35px;
    animation: titleFadeIn 1s ease-out 0.5s both;
}

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

.title-line {
    display: block;
    margin-bottom: 18px;
}

.title-highlight {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: textShimmer 3s ease-in-out infinite;
    background-size: 200% auto;
}

@keyframes textShimmer {
    to {
        background-position: 200% center;
    }
}

.hero-description {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.8;
    margin-bottom: 45px;
    max-width: 850px;
    animation: descriptionFadeIn 1s ease-out 0.7s both;
}

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

.hero-description strong {
    color: white;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-actions {
    display: flex;
    gap: 25px;
    margin-bottom: 70px;
    animation: actionsFadeIn 1s ease-out 0.9s both;
}

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

.hero-trust {
    display: flex;
    gap: 50px;
    padding: 45px 50px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-2xl);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
    animation: trustFadeIn 1s ease-out 1.1s both;
}

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

.trust-item {
    display: flex;
    align-items: center;
    gap: 25px;
    position: relative;
}

.trust-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -25px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
}

.trust-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    box-shadow: 0 8px 24px rgba(255, 111, 0, 0.3);
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.trust-number {
    font-size: 38px;
    font-weight: 900;
    color: white;
    line-height: 1;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.trust-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 8px;
    font-weight: 500;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: white;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-12px);
    }
    60% {
        transform: translateX(-50%) translateY(-6px);
    }
}

.scroll-text {
    font-size: 13px;
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: 1px;
}

.scroll-arrow {
    font-size: 28px;
    color: white;
}

/* ====================
   为什么选择我们
   ==================== */
.section-why-us {
    background: var(--bg-white);
    padding: 120px 0;
    position: relative;
}

.section-why-us::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 30%, rgba(13, 71, 161, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(255, 111, 0, 0.03) 0%, transparent 50%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
    position: relative;
    z-index: 1;
}

.advantage-card {
    background: var(--gradient-card);
    padding: 55px 45px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(13, 71, 161, 0.08);
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-slow);
}

.advantage-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--gradient-hover);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.advantage-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(13, 71, 161, 0.15);
}

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

.advantage-card:hover::after {
    width: 400px;
    height: 400px;
}

.advantage-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 30px;
    background: var(--bg-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--primary-color);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    box-shadow: 0 8px 24px rgba(13, 71, 161, 0.1);
}

.advantage-card:hover .advantage-icon {
    background: var(--gradient-primary);
    color: white;
    transform: scale(1.15) rotate(5deg);
    box-shadow: 0 12px 32px rgba(13, 71, 161, 0.3);
}

.advantage-number {
    font-size: 52px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.advantage-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
}

.advantage-description {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* ====================
   服务项目
   ==================== */
.section-services {
    background: var(--bg-lighter);
    padding: 100px 0;
    position: relative;
}

.services-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--bg-lighter) 0%, var(--bg-white) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    position: relative;
    z-index: 1;
}

.service-item {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    box-shadow: var(--shadow-xl);
}

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

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 20px;
    background: var(--gradient-gold);
    color: white;
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    z-index: 10;
}

.service-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.service-featured .service-image {
    height: 100%;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-item:hover .service-image img {
    transform: scale(1.1);
}

.service-content {
    padding: 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-title i {
    color: var(--primary-color);
}

.service-desc {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    margin-bottom: 25px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.service-features i {
    color: #22c55e;
    font-size: 12px;
}

.service-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    align-self: flex-start;
    margin-top: auto;
    transition: var(--transition);
}

.service-cta:hover {
    background: var(--gradient-dark);
    transform: translateX(5px);
}

/* ====================
   清洗前后对比
   ==================== */
.section-comparison {
    background: white;
    padding: 100px 0;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.comparison-item {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.comparison-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.comparison-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.comparison-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comparison-label {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 6px 16px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    z-index: 10;
}

.before .comparison-label {
    background: rgba(255, 0, 0, 0.9);
    color: white;
}

.after .comparison-label {
    background: rgba(34, 197, 94, 0.9);
    color: white;
}

.comparison-info {
    padding: 30px;
    background: white;
}

.comparison-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.comparison-info p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ====================
   成功案例
   ==================== */
.section-cases {
    background: var(--bg-lighter);
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.section-cases::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(13, 71, 161, 0.03) 0%, transparent 70%);
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 55px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.filter-btn {
    padding: 12px 32px;
    background: white;
    border: 2px solid #e8e8e8;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.filter-btn:hover::before,
.filter-btn.active::before {
    transform: scaleX(1);
    transform-origin: left;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--primary-color);
    color: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
    margin-bottom: 55px;
    position: relative;
    z-index: 1;
}

.case-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-slow);
    position: relative;
    border: 1px solid rgba(13, 71, 161, 0.06);
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
    pointer-events: none;
}

.case-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(13, 71, 161, 0.15);
}

.case-card:hover::before {
    opacity: 0.02;
}

.case-image {
    position: relative;
    height: 240px;
    overflow: hidden;
}

.case-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(13, 71, 161, 0) 0%, rgba(13, 71, 161, 0.3) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.case-card:hover .case-image::before {
    opacity: 1;
}

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

.case-card:hover .case-image img {
    transform: scale(1.15) rotate(2deg);
}

.case-category {
    position: absolute;
    top: 18px;
    right: 18px;
    padding: 8px 20px;
    background: rgba(13, 71, 161, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 12px;
    font-weight: 700;
    border-radius: 50px;
    z-index: 3;
    transition: var(--transition);
}

.case-card:hover .case-category {
    background: var(--gradient-gold);
    transform: scale(1.05);
}

.case-content {
    padding: 28px;
    position: relative;
    z-index: 2;
}

.case-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.case-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.case-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 18px;
    border-top: 1px solid #f0f0f0;
}

.case-date {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.case-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.case-link:hover {
    color: var(--primary-lighter);
    gap: 10px;
}

.cases-cta {
    text-align: center;
    padding: 50px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.cases-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hover);
    opacity: 0;
    transition: var(--transition);
}

.cases-cta:hover::before {
    opacity: 1;
}

.cases-cta p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

/* ====================
   服务流程
   ==================== */
.section-process {
    background: white;
    padding: 100px 0;
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 50px;
    right: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 900;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.3);
    position: relative;
}

.step-number::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px solid var(--primary-light);
    border-radius: 50%;
    opacity: 0.5;
}

.step-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 15px;
    background: var(--bg-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-color);
}

.step-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.step-description {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ====================
   客户评价
   ==================== */
.section-testimonials {
    background: var(--bg-lighter);
    padding: 100px 0;
}

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

.testimonial-card {
    background: white;
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.testimonial-quote {
    font-size: 40px;
    color: var(--primary-color);
    opacity: 0.2;
    margin-bottom: 20px;
}

.testimonial-rating {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.testimonial-rating i {
    color: var(--accent-color);
    font-size: 16px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 25px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--bg-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-color);
}

.author-info h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.author-info p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 3px;
}

.author-years {
    font-size: 12px;
    color: var(--primary-color);
    font-weight: 600;
}

/* ====================
   常见问题
   ==================== */
.section-faq {
    background: white;
    padding: 100px 0;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 2px solid #f0f0f0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    background: white;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.faq-question i {
    font-size: 20px;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--bg-lighter);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer {
    padding: 0 30px;
}

.faq-answer p {
    padding: 25px 0;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

.faq-answer ul {
    list-style: disc;
    padding-left: 25px;
    padding-bottom: 25px;
}

.faq-answer li {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 8px;
}

/* ====================
   联系我们
   ==================== */
.section-contact {
    background: var(--bg-lighter);
    padding: 100px 0;
    position: relative;
}

.contact-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-lighter) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    position: relative;
    z-index: 1;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 30px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contact-details p,
.contact-details .contact-phone {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
}

.contact-phone {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-top: 5px;
}

.contact-form-wrapper {
    background: white;
    padding: 50px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-header {
    text-align: center;
    margin-bottom: 40px;
}

.form-header h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.form-header p {
    font-size: 15px;
    color: var(--text-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: var(--font-primary);
    color: var(--text-primary);
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 86, 179, 0.1);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%230056b3' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
}

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

.form-privacy {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.form-privacy i {
    color: #22c55e;
}

/* ====================
   页脚
   ==================== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.footer-logo .logo-text-1 {
    font-size: 36px;
    font-weight: 900;
    color: white;
}

.footer-logo .logo-text-2 {
    font-size: 12px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.footer-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: 25px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.contact-item i {
    color: var(--accent-color);
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    color: white;
    margin-bottom: 25px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links li a {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.copyright a {
    color: var(--primary-light);
}

.footer-links-bottom {
    display: flex;
    align-items: center;
    gap: 20px;
}

.footer-links-bottom a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-links-bottom span {
    color: rgba(255, 255, 255, 0.3);
}

/* ====================
   浮动咨询按钮
   ==================== */
.floating-contact {
    position: fixed;
    right: 30px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    background: white;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition);
}

.float-btn i {
    font-size: 20px;
}

.float-phone {
    color: var(--primary-color);
}

.float-phone:hover {
    background: var(--primary-color);
    color: white;
}

.float-wechat {
    color: #07c160;
}

.float-wechat:hover {
    background: #07c160;
    color: white;
}

.float-quote {
    color: var(--accent-color);
}

.float-quote:hover {
    background: var(--accent-color);
    color: white;
}

/* ====================
   响应式设计
   ==================== */
@media (max-width: 1024px) {
    .section {
        padding: 90px 0;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .hero-title {
        font-size: 52px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .hero-trust {
        gap: 35px;
        padding: 35px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .floating-contact {
        right: 20px;
        bottom: 90px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 70px 0;
    }
    
    .section-header {
        margin-bottom: 45px;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .section-subtitle {
        font-size: 15px;
    }
    
    .top-bar {
        display: none;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 100px 20px 30px;
        gap: 20px;
        box-shadow: var(--shadow-xl);
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: 18px;
        padding: 15px 0;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-btn {
        width: 100%;
        text-align: center;
        padding: 16px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-title {
        font-size: 38px;
        line-height: 1.2;
    }
    
    .hero-description {
        font-size: 16px;
        margin-bottom: 35px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-trust {
        flex-direction: column;
        gap: 25px;
        padding: 30px 25px;
    }
    
    .trust-item:not(:last-child)::after {
        display: none;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .advantage-card {
        padding: 40px 30px;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .cases-filter {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 10px 24px;
        font-size: 13px;
    }
    
    .process-timeline {
        flex-direction: column;
        gap: 40px;
    }
    
    .process-timeline::before {
        display: none;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 35px 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
        padding: 25px 20px;
    }
    
    .floating-contact {
        right: 15px;
        bottom: 70px;
    }
    
    .float-btn span {
        display: none;
    }
    
    .float-btn {
        width: 56px;
        height: 56px;
        padding: 0;
        justify-content: center;
    }
}

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

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}