/* ==================== IconPark 图标样式 ==================== */
.iconpark-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
}

.iconpark-icon svg {
    width: 100%;
    height: 100%;
}

/* 图标渐变色效果 */
.feature-icon .iconpark-icon svg path,
.feature-icon .iconpark-icon svg circle,
.feature-icon .iconpark-icon svg rect,
.highlight-icon .iconpark-icon svg path,
.highlight-icon .iconpark-icon svg circle,
.highlight-icon .iconpark-icon svg rect,
.tech-icon .iconpark-icon svg path,
.tech-icon .iconpark-icon svg circle,
.tech-icon .iconpark-icon svg rect {
    stroke: url(#icon-gradient) !important;
}

/* 为h4中的图标添加渐变 */
h4 .iconpark-icon svg path,
h4 .iconpark-icon svg circle,
h4 .iconpark-icon svg rect {
    stroke: url(#icon-gradient) !important;
}

/* 图标发光效果 */
.feature-icon .iconpark-icon,
.highlight-icon .iconpark-icon,
.tech-icon .iconpark-icon,
h4 .iconpark-icon {
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.5));
    transition: filter 0.3s ease;
}

/* 悬停时增强发光效果 */
.feature-card:hover .feature-icon .iconpark-icon,
.highlight-item:hover .highlight-icon .iconpark-icon,
.tech-item:hover .tech-icon .iconpark-icon {
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.8));
}

/* ==================== 全局样式 ==================== */
:root {
    /* 颜色系统 */
    --primary-color: #00d4ff;
    --secondary-color: #7b2cbf;
    --accent-color: #ff006e;
    --bg-dark: #0a0e27;
    --bg-darker: #050814;
    --bg-card: rgba(15, 23, 42, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border-color: rgba(0, 212, 255, 0.2);
    --glow-color: rgba(0, 212, 255, 0.4);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7b2cbf 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--glow-color);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(180deg, #0a0e27 0%, #050814 50%, #0a0e27 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==================== 背景动画 ==================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.15), transparent),
        radial-gradient(ellipse 60% 50% at 50% 120%, rgba(123, 44, 191, 0.15), transparent),
        radial-gradient(circle at 0% 50%, rgba(0, 212, 255, 0.08), transparent 50%),
        radial-gradient(circle at 100% 50%, rgba(255, 0, 110, 0.08), transparent 50%),
        linear-gradient(180deg, #0a0e27 0%, #050814 50%, #0a0e27 100%);
    overflow: hidden;
}

/* 添加网格效果 */
.bg-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
    animation: gridMove 20s linear infinite;
}

/* 添加光束效果 */
.bg-animation::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(0, 212, 255, 0.05) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(123, 44, 191, 0.05) 50%, transparent 70%);
    animation: lightBeam 15s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

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

.particle {
    position: absolute;
    border-radius: 50%;
    animation: float 20s infinite;
    opacity: 0.5;
    filter: blur(60px);
}

.particle:nth-child(1) {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.25) 0%, rgba(0, 212, 255, 0.1) 30%, transparent 70%);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.25) 0%, rgba(123, 44, 191, 0.1) 30%, transparent 70%);
    top: 50%;
    right: -150px;
    animation-delay: 5s;
}

.particle:nth-child(3) {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, rgba(0, 212, 255, 0.08) 30%, transparent 70%);
    bottom: -250px;
    left: 50%;
    animation-delay: 10s;
}

.particle:nth-child(4) {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 0, 110, 0.2) 0%, rgba(255, 0, 110, 0.08) 30%, transparent 70%);
    top: 30%;
    left: 20%;
    animation-delay: 15s;
}

.particle:nth-child(5) {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.2) 0%, rgba(123, 44, 191, 0.08) 30%, transparent 70%);
    bottom: 20%;
    right: 20%;
    animation-delay: 8s;
}

/* 动态光束效果 */
.light-rays {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.ray {
    position: absolute;
    width: 2px;
    height: 200px;
    background: linear-gradient(to bottom, transparent, rgba(0, 212, 255, 0.5), transparent);
    opacity: 0;
    animation: shootingStar 8s ease-in-out infinite;
}

.ray-1 {
    top: 10%;
    left: 20%;
    transform: rotate(-30deg);
    animation-delay: 0s;
}

.ray-2 {
    top: 30%;
    right: 30%;
    transform: rotate(30deg);
    animation-delay: 3s;
    background: linear-gradient(to bottom, transparent, rgba(123, 44, 191, 0.5), transparent);
}

.ray-3 {
    top: 60%;
    left: 40%;
    transform: rotate(-20deg);
    animation-delay: 6s;
    background: linear-gradient(to bottom, transparent, rgba(255, 0, 110, 0.4), transparent);
}

@keyframes shootingStar {
    0% {
        opacity: 0;
        transform: translateY(0) translateX(0) rotate(-30deg);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        opacity: 0;
        transform: translateY(100vh) translateX(100px) rotate(-30deg);
    }
}

/* ==================== 鼠标粒子效果 ==================== */
.mouse-particle {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    box-shadow: 0 0 10px currentColor, 0 0 20px currentColor, 0 0 30px currentColor;
    transition: all 0.1s ease-out;
    will-change: transform, opacity;
}

/* 鼠标光标增强效果（可选：隐藏默认光标） */
/* 如果不想隐藏默认光标，可以注释掉下面这些 */
/*
body {
    cursor: none;
}

a, button, .nav-link, .case-btn, .btn {
    cursor: none;
}
*/

/* 自定义光标跟随圆环 */
.custom-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
    animation: cursorPulse 2s ease-in-out infinite;
    mix-blend-mode: screen;
    background: linear-gradient(to bottom, rgba(96, 165, 250, 0.6), rgba(0, 212, 255, 0.6));
    box-shadow: 
        0 0 20px rgba(59, 130, 246, 0.5),
        0 0 40px rgba(0, 212, 255, 0.4),
        inset 0 0 20px rgba(255, 255, 255, 0.2);
}

@keyframes cursorPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.8;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, 50px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 80px) scale(0.9);
    }
    75% {
        transform: translate(30px, -50px) scale(1.05);
    }
}

/* ==================== 导航栏 (Upscayl风格) ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), 
                0 0 0 1px rgba(0, 212, 255, 0.1) inset;
}

.nav-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-logo .logo-img {
    height: 36px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    margin: 0;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
}

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

.nav-btn {
    padding: 10px 24px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.nav-btn-secondary {
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
}

.nav-btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
}

.nav-btn-primary {
    color: white;
    background: var(--gradient-primary);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.nav-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

/* 联系我们tooltip */
.contact-trigger {
    position: relative;
    cursor: pointer;
}

.contact-tooltip {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1001;
    pointer-events: none;
}

.contact-trigger:hover .contact-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.tooltip-content {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
    min-width: 260px;
    text-align: center;
}

.tooltip-content::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: rgba(15, 23, 42, 0.98);
    border-left: 1px solid rgba(255, 255, 255, 0.15);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.tooltip-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.tooltip-email {
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    word-break: break-all;
}

.tooltip-copy {
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tooltip-copy:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}

.tooltip-copy:active {
    transform: scale(0.98);
}

.footer-contact-trigger {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 4px 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.footer-contact-trigger:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-contact-trigger .contact-tooltip {
    left: 0;
    transform: translateX(0) translateY(10px);
    top: calc(100% + 8px);
}

.footer-contact-trigger:hover .contact-tooltip {
    transform: translateX(0) translateY(0);
}

.footer-contact-trigger .tooltip-content::before {
    left: 30px;
    transform: rotate(45deg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ==================== 首屏 Hero ==================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    overflow: hidden;
}

/* 视频背景 */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    opacity: 0.4;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(5, 8, 20, 0.7) 0%, 
        rgba(10, 14, 39, 0.8) 50%, 
        rgba(5, 8, 20, 0.9) 100%);
    z-index: 2;
}

.hero-content {
    max-width: 900px;
    z-index: 10;
    position: relative;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.2s both;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    animation: fadeInUp 1s ease 0.4s both;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    animation: fadeInUp 1s ease 0.6s both;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.8s both;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    padding: 16px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.02em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.6);
}

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

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

.btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* ==================== 浮动卡片 ==================== */
.hero-visual {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 8;
}

.floating-card {
    position: absolute;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-md);
    animation: floating 3s ease-in-out infinite;
}

.floating-card .card-icon {
    font-size: 2rem;
}

.floating-card .card-text {
    font-weight: 600;
    color: var(--text-primary);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 15%;
    animation-delay: 2s;
}

@keyframes floating {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ==================== 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: 10px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    animation: fadeIn 1s ease 1s both;
    z-index: 10;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: rotate(-45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(-45deg);
    }
    40% {
        transform: translateY(-10px) rotate(-45deg);
    }
    60% {
        transform: translateY(-5px) rotate(-45deg);
    }
}

/* ==================== Section通用样式 ==================== */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

/* 为每个section添加独特的光影效果 */
section:nth-child(odd)::before {
    content: '';
    position: absolute;
    top: 0;
    left: -10%;
    width: 40%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06), transparent 70%);
    pointer-events: none;
    animation: pulseLight 8s ease-in-out infinite;
}

section:nth-child(even)::before {
    content: '';
    position: absolute;
    top: 0;
    right: -10%;
    width: 40%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(123, 44, 191, 0.06), transparent 70%);
    pointer-events: none;
    animation: pulseLight 8s ease-in-out infinite 4s;
}

@keyframes pulseLight {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ==================== 平台介绍 ==================== */
.about-section {
    background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.03) 50%, transparent 100%);
    position: relative;
}

.about-section::before {
    content: '';
    position: absolute;
    top: 20%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.about-item {
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.about-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.about-item:hover::before {
    transform: scaleX(1);
}

.about-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.3);
}

.about-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.4);
}

.about-icon svg {
    width: 30px;
    height: 30px;
}

.about-item h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
}

.about-item p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 1.05rem;
}

/* ==================== 核心特性 ==================== */
.features-section {
    background: var(--bg-dark);
    position: relative;
    padding: 4rem 0;
}

.features-section::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

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

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.3);
}

.feature-number {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(0, 212, 255, 0.08);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

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

.cases-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.case-card {
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-12px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.3);
}

.case-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

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

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.case-btn {
    padding: 12px 28px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.case-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.case-info {
    padding: var(--spacing-md);
}

.case-info h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.case-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-color);
}

/* ==================== 使用教程 ==================== */
.tutorial-section {
    background: linear-gradient(180deg, rgba(123, 44, 191, 0.03) 0%, transparent 100%);
    position: relative;
    overflow: hidden;
}

.tutorial-section::before {
    content: '';
    position: absolute;
    top: 50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}

.tutorial-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.video-container {
    position: relative;
    width: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-normal);
}

.video-container:hover {
    border-color: var(--primary-color);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.2);
    transform: translateY(-5px);
}

.tutorial-video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 20px;
}

.tutorial-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 50px;
    transition: all var(--transition-normal);
}

.highlight-item:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.highlight-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.highlight-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
}

/* ==================== 技术架构 ==================== */
.technology-section {
    background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.03) 100%);
    position: relative;
}

.technology-section::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    background: radial-gradient(ellipse at bottom, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.tech-item {
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.tech-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.tech-item h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.tech-item ul {
    list-style: none;
    padding: 0;
}

.tech-item li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.tech-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    line-height: 1;
}

.tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.tech-feature-item {
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: var(--spacing-lg);
    color: white;
}

.tech-feature-item h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.tech-feature-item p {
    opacity: 0.9;
    line-height: 1.8;
}

/* ==================== 页脚 (Upscayl风格) ==================== */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-color) 50%, transparent 100%);
    opacity: 0.3;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    flex-shrink: 0;
}

.footer-slogan {
    height: 25px;
    width: auto;
    opacity: 0.9;
    filter: drop-shadow(0 2px 8px rgba(0, 212, 255, 0.3));
}

.footer-links-section {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    flex: 1;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-width: 120px;
}

.footer-column h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    padding: 4px 0;
}

.footer-column a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 52px;
    height: 52px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: 0 6px 24px rgba(0, 212, 255, 0.5);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 10px 35px rgba(0, 212, 255, 0.7);
}

.back-to-top:active {
    transform: scale(1.05);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* ==================== 客服浮动按钮 ==================== */
.customer-service {
    position: fixed;
    bottom: 107px;
    right: 40px;
    z-index: 999;
}

.cs-button {
    width: 52px;
    height: 52px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 24px rgba(0, 212, 255, 0.5);
    transition: all var(--transition-normal);
    position: relative;
}

.cs-button:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 35px rgba(0, 212, 255, 0.7);
}

.cs-button:active {
    transform: scale(1.05);
}

.cs-button svg {
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.cs-qrcode {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: white;
    border-radius: 16px;
    padding: var(--spacing-md);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: all var(--transition-normal);
    min-width: 220px;
}

.customer-service:hover .cs-qrcode {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.qrcode-header {
    font-size: 1rem;
    font-weight: 600;
    color: var(--bg-dark);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.cs-qrcode img {
    width: 180px;
    height: 180px;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}

.qrcode-footer {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--spacing-sm);
    color: #666;
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 968px) {
    .nav-container {
        flex-wrap: wrap;
    }
    
    .nav-content {
        width: 100%;
        justify-content: space-between;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 90px;
        flex-direction: column;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        width: calc(100% - 40px);
        margin: 0 20px;
        border-radius: 16px;
        border: 1px solid rgba(255, 255, 255, 0.1);
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md);
        gap: 4px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-actions {
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-sm);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        margin-top: var(--spacing-sm);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .floating-card {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: flex-start;
    }
    
    .footer-links-section {
        width: 100%;
        gap: var(--spacing-md);
    }
    
    .footer-column {
        flex: 1;
        min-width: 100px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-description {
        font-size: 1.05rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid,
    .features-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .tutorial-highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }
    
    .back-to-top svg {
        width: 22px;
        height: 22px;
    }
    
    .customer-service {
        bottom: 83px;
        right: 20px;
    }
    
    .cs-button {
        width: 48px;
        height: 48px;
    }
    
    .cs-button svg {
        width: 22px;
        height: 22px;
    }
    
    .cs-qrcode {
        right: 0;
        left: auto;
        transform: translateX(0);
    }
    
    .hero-video {
        opacity: 0.3;
    }
}

@media (max-width: 480px) {
    .hero-logo {
        height: 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .back-to-top {
        width: 46px;
        height: 46px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
    
    .customer-service {
        bottom: 76px;
        right: 15px;
    }
    
    .cs-button {
        width: 46px;
        height: 46px;
    }
    
    .cs-button svg {
        width: 20px;
        height: 20px;
    }
    
    .cs-qrcode {
        min-width: 200px;
    }
    
    .cs-qrcode img {
        width: 160px;
        height: 160px;
    }
    
    .hero-video {
        opacity: 0.25;
    }
    
    .nav-btn {
        font-size: 0.85rem;
        padding: 8px 20px;
    }
    
    .contact-tooltip {
        left: auto;
        right: 0;
        transform: translateX(0) translateY(10px);
        min-width: 240px;
    }
    
    .contact-trigger:hover .contact-tooltip {
        transform: translateX(0) translateY(0);
    }
    
    .tooltip-content {
        min-width: 240px;
    }
    
    .tooltip-content::before {
        left: auto;
        right: 20px;
        transform: rotate(45deg);
    }
    
    .tutorial-highlights {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .highlight-item {
        justify-content: center;
    }
    
    .footer-links-section {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-column {
        width: 100%;
    }
    
    .footer-bottom {
        text-align: center;
    }
}