/* ===========================
   高端现代设计系统 - 白泽传媒
   =========================== */

/* 导入高端字体 */
@import url('https://fonts.font.im/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:wght@700;900&display=swap');

/* CSS 变量定义 */
:root {
    /* 优雅配色系统 */
    --primary: #0052CC;
    --primary-light: #2684FF;
    --primary-dark: #003A8C;
    --secondary: #5243AA;
    --accent: #FF5630;
    --success: #36B37E;
    --warning: #FFAB00;
    
    /* 中性色调 */
    --gray-900: #091E42;
    --gray-800: #172B4D;
    --gray-700: #253858;
    --gray-600: #344563;
    --gray-500: #42526E;
    --gray-400: #5E6C84;
    --gray-300: #7A869A;
    --gray-200: #97A0AF;
    --gray-100: #B3BAC5;
    --gray-50: #F4F5F7;
    --white: #FFFFFF;
    
    /* 优雅渐变 */
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    /* 阴影系统 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 间距系统 */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    
    /* 动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 暗色主题 */
[data-theme="dark"] {
    /* 优雅配色系统 */
    --primary: #2684FF;
    --primary-light: #5BA3FF;
    --primary-dark: #0052CC;
    --secondary: #7B68EE;
    --accent: #FF6B4A;
    --success: #52C41A;
    --warning: #FAAD14;
    
    /* 中性色调 - 暗色模式 */
    --gray-900: #F4F5F7;
    --gray-800: #E4E7EB;
    --gray-700: #C9CDD2;
    --gray-600: #9EA5AD;
    --gray-500: #737D89;
    --gray-400: #505966;
    --gray-300: #374151;
    --gray-200: #2D3748;
    --gray-100: #1F2937;
    --gray-50: #111827;
    --white: #0F172A;
    
    /* 优雅渐变 - 暗色调整 */
    --gradient-1: linear-gradient(135deg, #7B68EE 0%, #9B59B6 100%);
    --gradient-2: linear-gradient(135deg, #FF6B9D 0%, #FE5858 100%);
    --gradient-3: linear-gradient(135deg, #66D3FA 0%, #3DAFFF 100%);
    --gradient-4: linear-gradient(135deg, #FDB913 0%, #F97B8B 100%);
    
    /* 阴影系统 - 暗色模式 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ===========================
   基础样式 & 性能优化
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* 避免不必要的重绘 */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* 滚动容器优化 */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    /* 启用平滑滚动的同时保持性能 */
    -webkit-overflow-scrolling: touch;
    /* 主题切换过渡 */
    transition: background-color var(--transition-base);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-900);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
    /* 优化渲染性能 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* 主题切换过渡 */
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* 对频繁动画的元素使用 will-change */
.navbar,
.hero-decoration,
.orbit,
.stat-card,
.service-item,
.feature-card,
.bento-item,
.info-card,
.scroll-top {
    will-change: transform;
}

/* 主题切换通用过渡 */
.navbar::before,
.nav-link,
.theme-toggle,
.hero,
.stat-card,
.bento-item,
.service-item,
.feature-card,
.info-card,
.contact-form-wrapper,
.notification,
.footer,
.badge,
.section-label,
.section-title,
.section-subtitle {
    transition: background-color var(--transition-base), 
                color var(--transition-base), 
                border-color var(--transition-base),
                box-shadow var(--transition-base);
}

/* 动画结束后移除 will-change */
.animated {
    will-change: auto;
}

/* 优雅的选中样式 */
::selection {
    background: var(--primary-light);
    color: var(--white);
}

/* 暗色模式特定样式 */
[data-theme="dark"] body {
    background: var(--gray-50);
    color: var(--gray-900);
}

[data-theme="dark"] ::selection {
    background: var(--primary);
    color: var(--gray-50);
}

/* 高端滚动条 */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--gray-50);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
    border: 3px solid var(--gray-50);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===========================
   布局容器
   =========================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }
}

/* ===========================
   加载动画
   =========================== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-inner {
    width: 80px;
    height: 80px;
    position: relative;
}

.loader-inner span {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: loader-spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

.loader-inner span:nth-child(2) {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-top-color: var(--secondary);
    animation-delay: 0.2s;
}

.loader-inner span:nth-child(3) {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    border-top-color: var(--accent);
    animation-delay: 0.4s;
}

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

/* ===========================
   导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: transform var(--transition-base);
    /* 使用 transform 而不是 top 以获得更好的性能 */
    transform: translateY(0);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: -1;
}

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

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.brand-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--white);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base);
}

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

.brand-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
}

.nav-link {
    padding: var(--space-sm) var(--space-lg);
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--gray-50);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(0, 82, 204, 0.08);
}

.theme-toggle {
    width: 42px;
    height: 42px;
    border: none;
    background: var(--gray-50);
    color: var(--gray-700);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: var(--space-md);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--gray-100);
    transform: rotate(180deg);
}

.hamburger {
    display: none;
}

/* ===========================
   英雄区 - 极简主义
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow: hidden;
    /* 创建独立的合成层 */
    transform: translateZ(0);
    /* 防止子元素溢出影响性能 */
    contain: layout style paint;
}

/* 动态背景 */
.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(0, 242, 254, 0.1) 0%, transparent 50%);
    animation: gradient-animation 30s ease infinite;
    /* 使用 GPU 加速 */
    transform: translateZ(0);
}

@keyframes gradient-animation {
    0% { transform: translateZ(0) rotate(0deg); }
    100% { transform: translateZ(0) rotate(360deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-lg);
    background: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-xl);
}

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

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
}

/* 高端按钮设计 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: 0.9375rem;
    position: relative;
    overflow: hidden;
    /* 使用 transform 而不是改变尺寸 */
    transform: translateZ(0);
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(0, 82, 204, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(0, 82, 204, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 82, 204, 0.04);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.0625rem;
}

/* 英雄区右侧 - 数据展示 */
.hero-visual {
    position: relative;
}

.hero-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.stat-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
    /* 创建合成层 */
    transform: translateZ(0);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
}

.stat-card:nth-child(2)::before { background: var(--gradient-2); }
.stat-card:nth-child(3)::before { background: var(--gradient-3); }
.stat-card:nth-child(4)::before { background: var(--gradient-4); }

.stat-card:hover {
    transform: translate3d(0, -8px, 0);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
    font-variant-numeric: tabular-nums;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-unit {
    font-size: 0.75rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 进度条卡片 */
.stat-progress {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto;
}

.stat-progress svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: var(--gray-100);
    stroke-width: 8;
}

.progress-fill {
    fill: none;
    stroke: url(#gradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    /* GPU 加速 */
    transform: translateZ(0);
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
}

.progress-label {
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* 装饰元素 */
.hero-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) translateZ(0);
    width: 600px;
    height: 600px;
    pointer-events: none;
    opacity: 0.1;
    /* 降低复杂度 */
    will-change: transform;
}

.orbit {
    position: absolute;
    border: 2px solid var(--primary);
    border-radius: 50%;
    /* GPU 加速 */
    transform: translateZ(0);
}

.orbit-1 {
    width: 100%;
    height: 100%;
    animation: orbit 30s linear infinite;
}

.orbit-2 {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    animation: orbit 20s linear infinite reverse;
    border-color: var(--secondary);
}

.orbit-3 {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    animation: orbit 15s linear infinite;
    border-color: var(--accent);
}

@keyframes orbit {
    from { transform: translateZ(0) rotate(0deg); }
    to { transform: translateZ(0) rotate(360deg); }
}

/* ===========================
   关于我们 - 优雅布局
   =========================== */
.about-section {
    padding: var(--space-4xl) 0;
    background: var(--gray-50);
    /* 创建独立的合成层 */
    transform: translateZ(0);
    /* 防止子元素溢出影响性能 */
    contain: layout style paint;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-lg);
    grid-auto-rows: minmax(100px, auto);
}

.bento-item {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.bento-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.bento-large {
    grid-column: span 12;
    grid-row: span 2;
}

.bento-medium {
    grid-column: span 6;
    grid-row: span 2;
}

.bento-small {
    grid-column: span 4;
    grid-row: span 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bento-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-lg);
}

.bento-content p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.team-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-1);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.bento-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.bento-medium:nth-child(3) .bento-icon {
    background: var(--gradient-2);
}

.counter-box {
    text-align: center;
}

.counter-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
}

.counter-label {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

.gradient-card {
    background: var(--gradient-1);
    color: var(--white);
}

.gradient-card .counter-value,
.gradient-card .counter-label {
    color: var(--white);
}

/* ===========================
   服务产品 - 卡片设计
   =========================== */
.services-section {
    padding: var(--space-4xl) 0;
    background: var(--white);
}

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.service-item {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
    /* 创建合成层 */
    transform: translateZ(0);
}

.service-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-item:hover {
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translate3d(0, -8px, 0);
}

.service-item:hover::after {
    transform: scaleX(1);
}

.service-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.service-icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.service-item:nth-child(2) .service-icon-wrapper {
    background: var(--gradient-2);
}

.service-item:nth-child(3) .service-icon-wrapper {
    background: var(--gradient-3);
}

.service-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-50);
    line-height: 1;
}

.service-item h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.service-item p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.service-features i {
    color: var(--success);
    font-size: 14px;
}

/* 询盘通特别展示 */
.special-service {
    background: var(--gradient-1);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    color: var(--white);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    overflow: hidden;
}

.special-service::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.5); opacity: 0.8; }
}

.special-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.special-service h3 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-lg);
}

.special-service p {
    font-size: 1.125rem;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.special-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.feature-item {
    text-align: center;
}

.feature-item i {
    font-size: 32px;
    margin-bottom: var(--space-sm);
}

.feature-item span {
    display: block;
    font-weight: 600;
}

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

.visual-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    transform: rotate(3deg);
    transition: all var(--transition-base);
}

.special-service:hover .visual-card {
    transform: rotate(-3deg) scale(1.05);
}

.visual-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin: 0 auto var(--space-lg);
}

.visual-stats {
    display: flex;
    gap: var(--space-2xl);
    justify-content: center;
}

.stat span {
    display: block;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
}

/* ===========================
   核心优势 - 网格布局
   =========================== */
.features-section {
    padding: var(--space-4xl) 0;
    background: var(--gray-50);
}

.features-mosaic {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
    /* 创建合成层 */
    transform: translateZ(0);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-1);
    opacity: 0.05;
    transform: rotate(45deg);
    transition: all var(--transition-base);
}

.feature-card:hover::before {
    opacity: 0.1;
}

.feature-card:hover {
    transform: translate3d(0, -8px, 0);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.feature-risk .feature-icon { background: var(--gradient-2); }
.feature-global .feature-icon { background: var(--gradient-3); }
.feature-data .feature-icon { background: var(--gradient-4); }

.feature-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.feature-highlight {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

/* ===========================
   联系我们 - 现代布局
   =========================== */
.contact-section {
    padding: var(--space-4xl) 0;
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin: var(--space-2xl) 0;
}

.info-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.info-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.info-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
}

.info-content p {
    color: var(--gray-600);
    margin: 0;
}

.social-links h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.social-icons {
    display: flex;
    gap: var(--space-md);
}

.social-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-700);
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-icon:hover {
    background: var(--gradient-1);
    color: var(--white);
    transform: translateY(-4px);
}

/* 表单设计 */
.contact-form-wrapper {
    background: var(--gray-50);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
}

.form-header {
    margin-bottom: var(--space-xl);
}

.form-header h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
}

.form-header p {
    color: var(--gray-600);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.form-group {
    position: relative;
}

.form-group-full {
    grid-column: span 2;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    padding-top: var(--space-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: var(--white);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.form-group label {
    position: absolute;
    top: 50%;
    left: var(--space-md);
    transform: translateY(-50%);
    color: var(--gray-500);
    font-size: 1rem;
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group textarea + label {
    top: var(--space-lg);
    transform: translateY(0);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group select:valid + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: var(--space-xs);
    font-size: 0.75rem;
    color: var(--primary);
    background: var(--white);
    padding: 0 var(--space-xs);
}

/* ===========================
   页脚 - 简约设计
   =========================== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-main {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-brand .brand-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--white);
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-desc {
    color: var(--gray-300);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-column a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--white);
}

.footer-column li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray-300);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--gray-800);
}

.footer-badges {
    display: flex;
    gap: var(--space-md);
}

.badge {
    padding: var(--space-xs) var(--space-md);
    background: var(--gray-800);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

/* ===========================
   返回顶部按钮
   =========================== */
.scroll-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ===========================
   响应式设计
   =========================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        margin-top: var(--space-2xl);
    }
    
    .bento-medium {
        grid-column: span 12;
    }
    
    .bento-small {
        grid-column: span 6;
    }
    
    .features-mosaic {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .special-service {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .special-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
        flex-direction: column;
        gap: 4px;
        cursor: pointer;
    }
    
    .hamburger span {
        width: 24px;
        height: 2px;
        background: var(--gray-700);
        transition: all var(--transition-base);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
        padding: var(--space-xl) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .services-container {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-group {
        grid-column: span 1 !important;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .bento-small {
        grid-column: span 12;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ===========================
   动画效果
   =========================== */
[data-aos] {
    transition-property: transform, opacity;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
    opacity: 0;
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
    opacity: 1;
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
    opacity: 0;
}

[data-aos="fade-down"].aos-animate {
    transform: translateY(0);
    opacity: 1;
}

[data-aos="fade-left"] {
    transform: translateX(30px);
    opacity: 0;
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
    opacity: 1;
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
    opacity: 0;
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
    opacity: 1;
}

/* 高级动画 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

/* 辅助类 */
.text-center { text-align: center; }
.text-gradient { 
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 性能优化 */
.will-change-transform {
    will-change: transform;
}

/* ===========================
   通知系统
   =========================== */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transform: translate3d(400px, 0, 0);
    transition: transform var(--transition-base);
    z-index: 9999;
    max-width: 360px;
    border-left: 4px solid var(--primary);
}

.notification.show {
    transform: translate3d(0, 0, 0);
}

.notification-success {
    border-left-color: var(--success);
}

.notification-success i {
    color: var(--success);
}

.notification-error {
    border-left-color: var(--accent);
}

.notification-error i {
    color: var(--accent);
}

/* ===========================
   涟漪效果
   =========================== */
.btn, .social-icon {
    position: relative;
    overflow: hidden;
}

.ripple {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: translate(-50%, -50%) scale(20);
        opacity: 0;
    }
}

/* ===========================
   表单错误状态
   =========================== */
.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--accent);
}

.error-message {
    display: block;
    color: var(--accent);
    font-size: 0.75rem;
    margin-top: var(--space-xs);
    animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .scroll-top,
    .hamburger,
    .theme-toggle,
    .hero-decoration {
        display: none !important;
    }
    
    body {
        color: black;
        background: white;
    }
    
    .section-title {
        color: black;
    }
}

/* 减少动画复杂度 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 移动端性能优化 */
@media (max-width: 768px) {
    /* 移动端禁用某些动画 */
    .hero::before,
    .hero-decoration,
    .orbit {
        animation: none;
    }
    
    /* 简化阴影 */
    .stat-card,
    .service-item,
    .feature-card {
        box-shadow: var(--shadow-sm);
    }
    
    /* 禁用 will-change */
    * {
        will-change: auto !important;
    }
}

/* 优化滚动性能 */
.hero,
.about-section,
.services-section,
.features-section,
.contact-section {
    /* 创建独立的合成层 */
    transform: translateZ(0);
    /* 防止子元素溢出影响性能 */
    contain: layout style paint;
}

/* 优化图片和图标 */
img,
svg {
    /* 防止布局偏移 */
    height: auto;
    max-width: 100%;
    /* GPU 加速 */
    transform: translateZ(0);
}

/* 优化表单输入 */
.form-group input,
.form-group select,
.form-group textarea {
    /* 避免移动端缩放 */
    font-size: 16px;
    /* 优化聚焦性能 */
    outline-offset: -2px;
}

/* 优化按钮交互 */
.btn:active {
    transform: translateZ(0) scale(0.98);
}

/* ===========================
   暗色主题样式覆盖
   =========================== */

/* 导航栏 */
[data-theme="dark"] .navbar::before {
    background: rgba(17, 24, 39, 0.95);
}

[data-theme="dark"] .navbar.scrolled {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .nav-link {
    color: var(--gray-300);
}

[data-theme="dark"] .nav-link:hover {
    color: var(--primary);
    background: var(--gray-100);
}

[data-theme="dark"] .nav-link.active {
    color: var(--primary);
    background: rgba(38, 132, 255, 0.1);
}

[data-theme="dark"] .theme-toggle {
    background: var(--gray-100);
    color: var(--gray-300);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--gray-200);
}

/* 英雄区 */
[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1a1f36 0%, #0f172a 100%);
}

[data-theme="dark"] .hero-badge {
    background: var(--gray-100);
    color: var(--gray-300);
}

[data-theme="dark"] .stat-card {
    background: rgba(31, 41, 55, 0.8);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .stat-icon {
    background: var(--gray-100);
    color: var(--primary);
}

/* 关于我们 */
[data-theme="dark"] .about-section {
    background: var(--gray-100);
}

[data-theme="dark"] .bento-item {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .gradient-card {
    background: var(--gradient-1);
}

/* 服务产品 */
[data-theme="dark"] .services-section {
    background: var(--gray-50);
}

[data-theme="dark"] .service-item {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .special-service {
    background: var(--gradient-1);
}

[data-theme="dark"] .visual-card {
    background: rgba(31, 41, 55, 0.2);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

/* 核心优势 */
[data-theme="dark"] .features-section {
    background: var(--gray-100);
}

[data-theme="dark"] .feature-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .feature-highlight {
    background: var(--gray-100);
    color: var(--primary);
}

/* 联系我们 */
[data-theme="dark"] .contact-section {
    background: var(--gray-50);
}

[data-theme="dark"] .info-card {
    background: var(--gray-100);
}

[data-theme="dark"] .info-card:hover {
    background: var(--gray-200);
}

[data-theme="dark"] .social-icon {
    background: var(--gray-100);
    color: var(--gray-300);
}

[data-theme="dark"] .social-icon:hover {
    background: var(--gradient-1);
    color: var(--gray-50);
}

[data-theme="dark"] .contact-form-wrapper {
    background: var(--gray-100);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea {
    background: var(--gray-50);
    border-color: var(--gray-200);
    color: var(--gray-900);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus,
[data-theme="dark"] .form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(38, 132, 255, 0.2);
}

[data-theme="dark"] .form-group label {
    color: var(--gray-400);
}

[data-theme="dark"] .form-group input:focus + label,
[data-theme="dark"] .form-group input:not(:placeholder-shown) + label,
[data-theme="dark"] .form-group select:valid + label,
[data-theme="dark"] .form-group textarea:focus + label,
[data-theme="dark"] .form-group textarea:not(:placeholder-shown) + label {
    background: var(--gray-50);
}

/* 页脚 */
[data-theme="dark"] .footer {
    background: #080c14;
    border-top: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .footer h3,
[data-theme="dark"] .footer h4 {
    color: #E4E7EB;
}

[data-theme="dark"] .footer-desc,
[data-theme="dark"] .footer-column a,
[data-theme="dark"] .footer-column li {
    color: #9EA5AD;
}

[data-theme="dark"] .footer-column a:hover {
    color: var(--primary);
}

[data-theme="dark"] .footer-bottom {
    border-top-color: rgba(75, 85, 99, 0.3);
    color: #9EA5AD;
}

[data-theme="dark"] .badge {
    background: rgba(31, 41, 55, 0.6);
    color: #9EA5AD;
}

/* 通知 */
[data-theme="dark"] .notification {
    background: var(--gray-100);
    color: var(--gray-900);
}

/* 滚动条 */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--gray-100);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border: 3px solid var(--gray-100);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* 汉堡菜单 */
[data-theme="dark"] .hamburger span {
    background: var(--gray-300);
}

/* 标题和标签 */
[data-theme="dark"] .section-label {
    color: var(--primary);
}

[data-theme="dark"] .section-title {
    color: var(--gray-900);
}

[data-theme="dark"] .section-subtitle {
    color: var(--gray-400);
}

/* 加载动画 */
[data-theme="dark"] .loader {
    background: var(--gray-50);
}

/* 返回顶部按钮 */
[data-theme="dark"] .scroll-top {
    background: var(--gradient-1);
}

/* 品牌图标 */
[data-theme="dark"] .brand-icon {
    background: var(--gradient-1);
}

/* 数字单位 */
[data-theme="dark"] .stat-unit {
    color: var(--gray-400);
}

/* 服务编号 */
[data-theme="dark"] .service-number {
    color: var(--gray-200);
}

/* 轨道装饰 */
[data-theme="dark"] .orbit {
    border-color: var(--primary);
    opacity: 0.3;
}