/* 视创新云官网样式表 - 科技风格响应式设计 */

/* ==================== 变量定义 ==================== */
:root {
    /* 主题色彩 */
    --primary-color: #00D4FF;
    --primary-dark: #0099CC;
    --primary-light: #66E5FF;
    --secondary-color: #7B2DFF;
    --accent-color: #FF6B35;
    
    /* 背景色 */
    --bg-dark: #0A0E17;
    --bg-card: #111827;
    --bg-card-hover: #1F2937;
    --bg-section: #0F172A;
    
    /* 文字颜色 */
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-hero: linear-gradient(135deg, #0A0E17 0%, #1A1F35 50%, #0A0E17 100%);
    --gradient-card: linear-gradient(180deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 45, 255, 0.05) 100%);
    
    /* 边框颜色 */
    --border-color: rgba(0, 212, 255, 0.2);
    --border-hover: rgba(0, 212, 255, 0.5);
    
    /* 阴影 */
    --shadow-primary: 0 0 30px rgba(0, 212, 255, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
    
    /* 动画时长 */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ==================== 通用容器 ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

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

.section {
    padding: 120px 0;
    position: relative;
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }
}

/* ==================== 通用标题 ==================== */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-subtitle {
    display: inline-block;
    font-size: 14px;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 16px;
    position: relative;
}

.section-subtitle::before,
.section-subtitle::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: var(--primary-color);
    opacity: 0.5;
}

.section-subtitle::before {
    right: calc(100% + 20px);
}

.section-subtitle::after {
    left: calc(100% + 20px);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
    }
}

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

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 14, 23, 0.98);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--bg-dark);
}

.logo-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-text span {
    color: var(--primary-color);
}

.nav {
    display: flex;
    align-items: center;
    gap: 48px;
}

.nav-list {
    display: flex;
    gap: 40px;
}

.nav-item a {
    font-size: 15px;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-fast);
}

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

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

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

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

.nav-item.active a::after {
    width: 100%;
}

.contact-btn {
    padding: 12px 28px;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

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

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

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

@media (max-width: 1024px) {
    .nav-list {
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-dark);
        flex-direction: column;
        justify-content: flex-start;
        padding: 40px 20px;
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }
    
    .nav.active {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .nav-item {
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-item a {
        display: block;
        padding: 20px 0;
        font-size: 18px;
    }
    
    .contact-btn {
        margin-top: 40px;
        width: 100%;
        text-align: center;
    }
}

/* ==================== 底部导航栏（移动端单页跳转） ==================== */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    z-index: 999;
    padding: 8px 0;
    padding-bottom: env(safe-area-inset-bottom, 8px);
}

@media (max-width: 768px) {
    .bottom-nav {
        display: flex;
        justify-content: space-around;
    }
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    color: var(--text-muted);
    font-size: 11px;
    transition: color var(--transition-fast);
}

.bottom-nav-item.active {
    color: var(--primary-color);
}

.bottom-nav-item svg {
    width: 22px;
    height: 22px;
}

/* ==================== Hero 区域 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(123, 45, 255, 0.1), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 32px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .hero-desc {
        font-size: 16px;
    }
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: transparent;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 粒子动画背景 */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ==================== 核心能力 ==================== */
.capabilities {
    background: var(--bg-section);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

@media (max-width: 1024px) {
    .capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
}

.capability-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.capability-card:hover {
    transform: translateY(-10px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card);
}

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

.capability-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.capability-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.capability-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 产品展示 ==================== */
.products {
    background: var(--bg-dark);
}

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

@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card);
}

.product-image {
    height: 200px;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    position: relative;
    overflow: hidden;
}

.product-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(transparent, var(--bg-card));
}

.product-tag {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 6px 16px;
    background: var(--accent-color);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    z-index: 1;
}

.product-content {
    padding: 30px;
}

.product-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.product-feature {
    padding: 6px 14px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 12px;
    color: var(--primary-color);
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    transition: gap var(--transition-fast);
}

.product-link:hover {
    gap: 14px;
}

/* ==================== 解决方案 ==================== */
.solutions {
    background: var(--bg-section);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

@media (max-width: 768px) {
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 50px 40px;
    display: flex;
    gap: 30px;
    transition: all var(--transition-normal);
}

@media (max-width: 600px) {
    .solution-card {
        flex-direction: column;
        padding: 30px;
    }
}

.solution-card:hover {
    border-color: var(--border-hover);
    transform: translateX(10px);
}

.solution-icon {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.solution-info {
    flex: 1;
}

.solution-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 12px;
}

.solution-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.solution-values {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.solution-value {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--primary-color);
}

.solution-value::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    font-size: 12px;
}

/* ==================== 案例展示 ==================== */
.cases {
    background: var(--bg-dark);
}

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

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

.case-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 300px;
    cursor: pointer;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(0, 0, 0, 0.9) 100%);
    z-index: 1;
    transition: all var(--transition-normal);
}

.case-card:hover::before {
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.2) 0%, rgba(0, 0, 0, 0.95) 100%);
}

.case-image {
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    transition: transform var(--transition-slow);
}

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

.case-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    z-index: 2;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.case-card:hover .case-content {
    transform: translateY(0);
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-color);
    color: var(--bg-dark);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    margin-bottom: 12px;
}

.case-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

/* ==================== 数据统计 ==================== */
.stats {
    background: var(--bg-section);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

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

.stat-number {
    font-size: 56px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .stat-number {
        font-size: 40px;
    }
}

.stat-unit {
    font-size: 28px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.about-text h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.about-feature-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-card);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.about-feature-text {
    font-size: 14px;
    font-weight: 500;
}

.about-image {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
    position: relative;
    overflow: hidden;
}

.about-image::after {
    content: '2021';
    position: absolute;
    bottom: 30px;
    right: 30px;
    font-size: 80px;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.1;
}

/* ==================== 联系方式 ==================== */
.contact {
    background: var(--bg-section);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-info p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--border-hover);
    transform: translateX(10px);
}

.contact-item-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--bg-dark);
}

.contact-item-content {
    flex: 1;
}

.contact-item-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.contact-item-value {
    font-size: 16px;
    font-weight: 500;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form h4 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

.form-submit {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 600px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 320px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--bg-dark);
}

/* ==================== 动画效果 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease-out;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease-out;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ==================== 辅助类 ==================== */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mt-40 {
    margin-top: 40px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}

/* 移动端底部padding */
@media (max-width: 768px) {
    .footer {
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 30px));
    }
}


/* ==================== 高级动画效果增强 ==================== */

/* Hero 区域增强 */
.hero {
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* 粒子背景Canvas */
#three-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* 增强的粒子效果 */
.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 20s linear infinite;
    box-shadow: 0 0 10px var(--primary-color);
}

.particle:nth-child(odd) {
    background: var(--secondary-color);
    box-shadow: 0 0 10px var(--secondary-color);
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-100vh) scale(1);
    }
}

/* 数字计数器增强 */
.counter {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* 卡片3D悬浮效果 */
.capability-card,
.product-card,
.solution-card,
.case-card {
    transform-style: preserve-3d;
    will-change: transform;
}

.capability-card:hover .capability-icon,
.product-card:hover .product-image,
.solution-card:hover .solution-icon,
.case-card:hover .case-image {
    animation-play-state: paused;
}

/* 卡片边框光效 */
.capability-card::after,
.product-card::after,
.solution-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(
        45deg,
        transparent 30%,
        var(--primary-color) 50%,
        transparent 70%
    );
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
    filter: blur(8px);
}

.capability-card:hover::after,
.product-card:hover::after,
.solution-card:hover::after {
    opacity: 0.5;
    animation: borderGlow 2s linear infinite;
}

@keyframes borderGlow {
    0% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 200% 50%;
    }
}

/* 图标动画增强 */
.capability-icon {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.capability-card:hover .capability-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

.solution-icon {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.solution-card:hover .solution-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

/* 按钮悬停光效 */
.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::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: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

/* 链接悬停下划线动画 */
.nav-item a,
.product-link,
.footer-links a {
    position: relative;
}

.nav-item a::after,
.product-link::after,
.footer-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-item a:hover::after,
.product-link:hover::after,
.footer-links a:hover::after {
    width: 100%;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    animation: bounce 2s infinite;
}

.scroll-indicator::after {
    content: '';
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(10px);
    }
}

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

/* 案例卡片悬停效果增强 */
.case-card {
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.case-card::before {
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.case-card:hover {
    transform: translateY(-10px) scale(1.02);
}

/* 统计数据区增强 */
.stat-item {
    position: relative;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -20px;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: linear-gradient(
        180deg,
        transparent,
        var(--border-color),
        transparent
    );
}

.stat-item:first-child::before {
    display: none;
}

@media (max-width: 768px) {
    .stat-item::before {
        display: none;
    }
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s, visibility 0.5s;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 表单输入框聚焦动画 */
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 
        0 0 0 3px rgba(0, 212, 255, 0.1),
        0 0 20px rgba(0, 212, 255, 0.2);
    transform: scale(1.01);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .hero-title {
        letter-spacing: -1px;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    /* 简化移动端动画 */
    .capability-card:hover,
    .product-card:hover,
    .solution-card:hover,
    .case-card:hover {
        transform: translateY(-5px);
    }
    
    .capability-card:hover .capability-icon,
    .solution-card:hover .solution-icon {
        transform: scale(1.05);
    }
}

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

/* 打印样式隐藏动画元素 */
@media print {
    .hero-particles,
    .particle,
    .scroll-indicator,
    #three-particles {
        display: none !important;
    }
}

/* 聚焦可见性 - 无障碍 */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

/* 选择文本样式 */
::selection {
    background: var(--primary-color);
    color: var(--bg-dark);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--bg-dark);
}

/* 移动端底部padding */
@media (max-width: 768px) {
    .footer {
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 30px));
    }
}