/* ========================================
   重庆长毛象科技有限公司 - 苹果风格官网
   浅色系 · 高科技 · 极简设计
   ======================================== */

/* CSS变量 - 浅色主题（默认） */
:root {
    /* 主色调 */
    --primary: #0071e3;
    --primary-hover: #0077ed;
    --primary-dark: #0051a2;
    
    /* 文字颜色 */
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --text-tertiary: #6e6e73;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #fafafa;
    
    /* 边框和分割 */
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    
    /* 渐变 */
    --gradient-blue: linear-gradient(135deg, #0071e3 0%, #42a5f5 100%);
    --gradient-text: linear-gradient(135deg, #1d1d1f 0%, #434344 50%, #1d1d1f 100%);
    --gradient-hero: linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.1);
    
    /* 动画 */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.2s;
    --duration-normal: 0.4s;
    --duration-slow: 0.8s;
    
    /* 尺寸 */
    --nav-height: 52px;
    --max-width: 1024px;
    --section-padding: 160px;
}

/* 深色主题 */
[data-theme="dark"] {
    /* 主色调 */
    --primary: #00d4ff;
    --primary-hover: #33ddff;
    --primary-dark: #00a8cc;
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-tertiary: #64748b;
    
    /* 背景色 */
    --bg-primary: #0a0f1a;
    --bg-secondary: #0a1628;
    --bg-tertiary: #0f172a;
    
    /* 边框和分割 */
    --border: rgba(0, 212, 255, 0.15);
    --border-light: rgba(0, 212, 255, 0.08);
    
    /* 渐变 */
    --gradient-blue: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
    --gradient-text: linear-gradient(135deg, #ffffff 0%, #a0aec0 50%, #ffffff 100%);
    --gradient-hero: linear-gradient(180deg, #0a1628 0%, #0a0f1a 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 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.6);
}

/* 重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

/* 选择文本颜色 */
::selection {
    background: rgba(0, 113, 227, 0.2);
    color: var(--text-primary);
}

/* ========================================
   导航栏 - 毛玻璃效果
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 9999;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--duration-fast) ease;
}

.nav-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 15px;
    transition: opacity var(--duration-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-logo svg {
    color: var(--primary);
}

.nav-logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 400;
    opacity: 0.8;
    transition: opacity var(--duration-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width var(--duration-fast);
}

.nav-link:hover {
    opacity: 1;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-cta {
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    border-radius: 980px;
    transition: all var(--duration-fast);
}

.nav-cta:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

/* 主题切换按钮 */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--duration-fast);
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

.theme-icon {
    position: absolute;
    font-size: 18px;
    transition: all var(--duration-normal) var(--ease-spring);
}

.theme-icon.light {
    opacity: 1;
    transform: translateY(0) rotate(0);
}

.theme-icon.dark {
    opacity: 0;
    transform: translateY(20px) rotate(90deg);
}

/* 深色主题时的图标切换 */
[data-theme="dark"] .theme-icon.light {
    opacity: 0;
    transform: translateY(-20px) rotate(-90deg);
}

[data-theme="dark"] .theme-icon.dark {
    opacity: 1;
    transform: translateY(0) rotate(0);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 18px;
    height: 1.5px;
    background: var(--text-primary);
    transition: all var(--duration-fast);
    border-radius: 1px;
}

/* ========================================
   Hero Section V2 - 中国移动风格
   ======================================== */
.hero-v2 {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr auto;
    gap: 40px;
    padding: calc(var(--nav-height) + 60px) 60px 40px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero-v2::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0, 113, 227, 0.03) 0%, rgba(0, 113, 227, 0.06) 100%);
    clip-path: polygon(30% 0, 100% 0, 100% 100%, 0% 100%);
}

/* 左侧内容区 */
.hero-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 2;
    padding-right: 40px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 8px 16px;
    background: rgba(0, 113, 227, 0.1);
    border: 1px solid rgba(0, 113, 227, 0.2);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 24px;
}

.tag-icon {
    font-size: 16px;
}

.hero-title-v2 {
    margin-bottom: 24px;
}

.title-main {
    display: block;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.title-sub {
    display: block;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    background: linear-gradient(135deg, #0071e3 0%, #00c853 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-desc-v2 {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn-outline {
    padding: 14px 28px;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration-fast);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-large svg {
    transition: transform var(--duration-fast);
}

.btn-large:hover svg {
    transform: translateX(4px);
}

/* 核心指标 */
.hero-metrics {
    display: flex;
    gap: 40px;
}

.metric-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.metric-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 右侧视觉区 */
.hero-right {
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 560px;
    aspect-ratio: 1;
}

.hero-image-main {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 24px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06),
        0 20px 25px -5px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
}

/* IoT 视觉动画 */
.iot-visual {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 辐射式业务图谱 */
.radiation-visual {
    overflow: hidden;
}

.radial-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.core-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(0, 113, 227, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.3); opacity: 0.3; }
}

/* 辐射轨道 */
.radial-orbits {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.orbit-1 {
    width: 140px;
    height: 140px;
    border: 2px solid rgba(0, 113, 227, 0.2);
    background: radial-gradient(circle, transparent 30%, rgba(0, 113, 227, 0.05) 100%);
    animation: orbit-rotate 20s linear infinite;
}

.orbit-2 {
    width: 220px;
    height: 220px;
    border: 1px dashed rgba(0, 113, 227, 0.15);
    animation: orbit-rotate 30s linear infinite reverse;
}

.orbit-3 {
    width: 300px;
    height: 300px;
    border: 1px dotted rgba(0, 113, 227, 0.1);
    opacity: 0.7;
    animation: orbit-rotate 40s linear infinite;
}

@keyframes orbit-rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 辐射节点 */
.radial-nodes {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 5;
}

.r-node {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
}

.r-node-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 18px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 113, 227, 0.1);
    animation: node-float 4s ease-in-out infinite;
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.r-node-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.r-node:hover .r-node-inner {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.15), 0 0 0 2px rgba(0, 113, 227, 0.2);
}

.r-node:hover .r-node-inner::before {
    opacity: 1;
}

.r-node-inner .node-icon {
    font-size: 24px;
    animation: icon-pulse 2s ease-in-out infinite;
}

.r-node-1 .node-icon { animation-delay: 0s; }
.r-node-2 .node-icon { animation-delay: 0.5s; }
.r-node-3 .node-icon { animation-delay: 1s; }
.r-node-4 .node-icon { animation-delay: 1.5s; }

@keyframes icon-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

@keyframes node-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.r-node-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: rgba(0, 113, 227, 0.1);
    border-radius: 16px;
    animation: node-pulse 2s ease-out infinite;
    z-index: 1;
}

@keyframes node-pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    100% { transform: translate(-50%, -50%) scale(1.4); opacity: 0; }
}

/* 辐射节点位置 - 上下左右分布 */
.r-node-1 {
    top: 8%;
    left: 50%;
    transform: translateX(-50%);
}

.r-node-2 {
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
}

.r-node-3 {
    bottom: 8%;
    left: 50%;
    transform: translateX(-50%);
}

.r-node-4 {
    top: 50%;
    left: 5%;
    transform: translateY(-50%);
}

.r-node-1 .r-node-inner { animation-delay: 0s; }
.r-node-2 .r-node-inner { animation-delay: 0.5s; }
.r-node-3 .r-node-inner { animation-delay: 1s; }
.r-node-4 .r-node-inner { animation-delay: 1.5s; }

/* 辐射连接线 */
.radial-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.radial-svg {
    width: 100%;
    height: 100%;
}

/* 基础辐射线 */
.r-line-base {
    stroke: rgba(0, 113, 227, 0.15);
    stroke-width: 1;
}

/* 动态流动辐射线 */
.r-line-flow {
    stroke: url(#radialGrad);
    stroke-width: 2;
    stroke-dasharray: 10 5;
    animation: line-flow 1.5s linear infinite;
}

/* 节点间连接弧线 - 基础 */
.r-arc {
    stroke: rgba(0, 113, 227, 0.12);
    stroke-width: 1.5;
    stroke-dasharray: 6 3;
}

/* 节点间连接弧线 - 动态流动 */
.r-arc-flow {
    stroke: url(#radialGrad);
    stroke-width: 2;
    stroke-dasharray: 8 4;
    animation: arc-flow 3s linear infinite;
    opacity: 0.8;
}

/* 中心数据波纹 */
.data-ripple {
    animation: ripple-expand 3s ease-out infinite;
    transform-origin: center;
}

.data-ripple:nth-child(2) {
    animation-delay: 1s;
}

.data-ripple:nth-child(3) {
    animation-delay: 2s;
}

@keyframes line-flow {
    0% { stroke-dashoffset: 30; }
    100% { stroke-dashoffset: 0; }
}

@keyframes arc-flow {
    0% { stroke-dashoffset: 24; }
    100% { stroke-dashoffset: 0; }
}

@keyframes ripple-expand {
    0% { transform: scale(0.8); opacity: 0.6; }
    50% { opacity: 0.3; }
    100% { transform: scale(1.2); opacity: 0; }
}

/* 数据粒子 - 从中心向外流动 */
.data-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: radial-gradient(circle, #0071e3 0%, rgba(0, 113, 227, 0.3) 100%);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 113, 227, 0.5);
}

/* 向上流动 - 到水文水利 */
.p-1 {
    top: 50%;
    left: 50%;
    animation: particle-to-top 2s ease-out infinite;
}

.p-5 {
    top: 50%;
    left: 50%;
    animation: particle-to-top 2s ease-out infinite 1s;
}

/* 向右流动 - 到智慧园区 */
.p-2 {
    top: 50%;
    left: 50%;
    animation: particle-to-right 2s ease-out infinite 0.5s;
}

.p-6 {
    top: 50%;
    left: 50%;
    animation: particle-to-right 2s ease-out infinite 1.5s;
}

/* 向下流动 - 到无人机巡检 */
.p-3 {
    top: 50%;
    left: 50%;
    animation: particle-to-bottom 2s ease-out infinite 0.25s;
}

.p-7 {
    top: 50%;
    left: 50%;
    animation: particle-to-bottom 2s ease-out infinite 1.25s;
}

/* 向左流动 - 到数字孪生 */
.p-4 {
    top: 50%;
    left: 50%;
    animation: particle-to-left 2s ease-out infinite 0.75s;
}

.p-8 {
    top: 50%;
    left: 50%;
    animation: particle-to-left 2s ease-out infinite 1.75s;
}

@keyframes particle-to-top {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    10% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    90% { transform: translate(-50%, calc(-50% - 70px)) scale(0.6); opacity: 0.6; }
    100% { transform: translate(-50%, calc(-50% - 80px)) scale(0); opacity: 0; }
}

@keyframes particle-to-right {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    10% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    90% { transform: translate(calc(-50% + 70px), -50%) scale(0.6); opacity: 0.6; }
    100% { transform: translate(calc(-50% + 80px), -50%) scale(0); opacity: 0; }
}

@keyframes particle-to-bottom {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    10% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    90% { transform: translate(-50%, calc(-50% + 70px)) scale(0.6); opacity: 0.6; }
    100% { transform: translate(-50%, calc(-50% + 80px)) scale(0); opacity: 0; }
}

@keyframes particle-to-left {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    10% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    90% { transform: translate(calc(-50% - 70px), -50%) scale(0.6); opacity: 0.6; }
    100% { transform: translate(calc(-50% - 80px), -50%) scale(0); opacity: 0; }
}

/* 节点间数据流 */
.node-data-flow {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.flow-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #00c853;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 200, 83, 0.6);
}

/* 顺时针流动：上→右→下→左→上 */
.f-1 {
    top: 15%;
    left: 50%;
    animation: flow-clockwise-1 4s linear infinite;
}

.f-2 {
    top: 50%;
    right: 15%;
    animation: flow-clockwise-2 4s linear infinite 1s;
}

.f-3 {
    bottom: 15%;
    left: 50%;
    animation: flow-clockwise-3 4s linear infinite 2s;
}

.f-4 {
    top: 50%;
    left: 15%;
    animation: flow-clockwise-4 4s linear infinite 3s;
}

@keyframes flow-clockwise-1 {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    25% { transform: translateX(100px) translateY(50px); opacity: 0.5; }
    50% { transform: translateX(0) translateY(100px); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes flow-clockwise-2 {
    0% { transform: translateY(-50%) translateX(0); opacity: 1; }
    25% { transform: translateY(100px) translateX(-50px); opacity: 0.5; }
    50% { transform: translateY(0) translateX(-100px); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes flow-clockwise-3 {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    25% { transform: translateX(-100px) translateY(-50px); opacity: 0.5; }
    50% { transform: translateX(0) translateY(-100px); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes flow-clockwise-4 {
    0% { transform: translateY(-50%) translateX(0); opacity: 1; }
    25% { transform: translateY(-100px) translateX(50px); opacity: 0.5; }
    50% { transform: translateY(0) translateX(100px); opacity: 0; }
    100% { opacity: 0; }
}

.visual-center {
    position: relative;
    width: 120px;
    height: 120px;
}

.center-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #0071e3 0%, #42a5f5 100%);
    border-radius: 50%;
    box-shadow: 0 0 40px rgba(0, 113, 227, 0.4);
    animation: pulse-core 2s ease-in-out infinite;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.center-core-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.core-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
}

.core-rings span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid rgba(0, 113, 227, 0.2);
    border-radius: 50%;
    animation: ring-expand 3s ease-out infinite;
}

.core-rings span:nth-child(1) {
    width: 80px;
    height: 80px;
    animation-delay: 0s;
}

.core-rings span:nth-child(2) {
    width: 100px;
    height: 100px;
    animation-delay: 1s;
}

.core-rings span:nth-child(3) {
    width: 120px;
    height: 120px;
    animation-delay: 2s;
}

.visual-nodes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    animation: node-float 4s ease-in-out infinite;
}

.node-icon {
    font-size: 28px;
}

.node-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.node-1 {
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}

.node-2 {
    top: 15%;
    right: 10%;
    animation-delay: 1s;
}

.node-3 {
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

.node-4 {
    bottom: 20%;
    right: 10%;
    animation-delay: 3s;
}

.connection-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.lines-svg {
    width: 100%;
    height: 100%;
}

.line {
    fill: none;
    stroke: url(#lineGrad);
    stroke-width: 2;
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    animation: line-draw 3s ease-out infinite;
}

.line-1 { animation-delay: 0s; }
.line-2 { animation-delay: 0.5s; }
.line-3 { animation-delay: 1s; }
.line-4 { animation-delay: 1.5s; }

/* 浮动信息卡 */
.info-float-card {
    position: absolute;
    background: white;
    border-radius: 16px;
    padding: 16px 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    animation: card-float 5s ease-in-out infinite;
}

.card-digital-twin {
    top: 8%;
    left: 8%;
    animation-delay: 0s;
    width: 165px;
}

.card-data-analysis {
    bottom: 8%;
    right: 8%;
    animation-delay: 2.5s;
    width: 145px;
}

.float-image {
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    margin-top: 8px;
}

.float-card-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.float-dot.blue {
    background: #4285f4;
}

.float-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.float-dot {
    width: 8px;
    height: 8px;
    background: #ff6b6b;
    border-radius: 50%;
    animation: dot-pulse 2s ease-in-out infinite;
}

.float-dot.green {
    background: #00c853;
}

.float-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.float-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.float-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.float-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.float-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
}

.status-text {
    font-size: 16px;
    font-weight: 700;
    color: #00c853;
}

.status-uptime {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 底部产品入口栏 */
.hero-products-bar {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    z-index: 2;
    margin-top: 20px;
}

.product-entry {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all var(--duration-fast);
    cursor: pointer;
}

.product-entry:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.entry-icon {
    font-size: 32px;
}

.entry-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.entry-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.entry-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 动画定义 */
@keyframes pulse-core {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 40px rgba(0, 113, 227, 0.4);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
        box-shadow: 0 0 60px rgba(0, 113, 227, 0.6);
    }
}

@keyframes ring-expand {
    0% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

@keyframes node-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

@keyframes line-draw {
    0% {
        stroke-dashoffset: 200;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        stroke-dashoffset: -200;
        opacity: 0;
    }
}

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

@keyframes dot-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* 水文波形动画 */
@keyframes wave-flow {
    0% { stroke-dashoffset: 400; }
    100% { stroke-dashoffset: 0; }
}

.wave-path {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    animation: wave-flow 4s ease-in-out infinite alternate;
}

.wave-path-2 {
    animation-delay: 1s;
    animation-duration: 5s;
}

/* 数据实时状态指示条 */
.data-pulse {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 113, 227, 0.08);
    border: 1px solid rgba(0, 113, 227, 0.2);
    border-radius: 20px;
    padding: 5px 14px;
    white-space: nowrap;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #00c853;
    animation: pulse-core 2s ease-in-out infinite;
    flex-shrink: 0;
}

.pulse-text {
    font-size: 12px;
    color: var(--primary);
    font-weight: 500;
}

[data-theme="dark"] .data-pulse {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .pulse-text {
    color: var(--primary);
}

.hero-title {
    margin-bottom: 24px;
}

.title-line {
    display: block;
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.015em;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 1s var(--ease-out) forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.1s;
}

.gradient-text {
    background: linear-gradient(135deg, #0071e3 0%, #42a5f5 50%, #00c853 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(21px, 3vw, 28px);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s var(--ease-out) 0.2s forwards;
}

.hero-description {
    font-size: 17px;
    color: var(--text-tertiary);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto 32px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s var(--ease-out) 0.25s forwards;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 1s var(--ease-out) 0.4s forwards;
}

/* Hero 统计数据 */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 40px;
    padding: 24px 40px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    z-index: 2;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s var(--ease-out) 0.5s forwards;
}

.hero-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 32px;
}

.hero-stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    letter-spacing: -0.02em;
}

.hero-stat-number .suffix {
    font-size: 20px;
    font-weight: 600;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-weight: 500;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Hero 服务领域 */
.hero-services {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
    flex-wrap: wrap;
    z-index: 2;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 1s var(--ease-out) 0.55s forwards;
}

.service-label {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.service-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.service-tag {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--duration-fast);
}

.service-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 17px;
    font-weight: 400;
    transition: all var(--duration-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    padding: 14px 28px;
    background: var(--primary);
    color: white;
    border-radius: 980px;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.btn-secondary {
    padding: 14px 28px;
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
    border-radius: 980px;
}

.btn-secondary:hover {
    background: rgba(0, 113, 227, 0.05);
}

.btn-text {
    color: var(--primary);
    font-size: 19px;
    padding: 0;
}

.btn-text:hover {
    text-decoration: underline;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Hero 视觉元素 */
.hero-visual {
    margin-top: 20px;
    margin-bottom: 60px;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 1s var(--ease-out) 0.6s forwards;
    position: relative;
}

/* 浮动数据卡片 */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    animation: float 6s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 10%;
    left: -80px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 50%;
    right: -60px;
    animation-delay: 2s;
}

.floating-card.card-3 {
    bottom: 20%;
    left: -40px;
    animation-delay: 4s;
}

.floating-icon {
    font-size: 24px;
}

.floating-data {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.floating-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.floating-label {
    font-size: 12px;
    color: var(--text-secondary);
}

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

.hero-device {
    position: relative;
    width: 300px;
    height: 400px;
    margin: 0 auto;
}

.device-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 24px;
    box-shadow: 
        0 50px 100px -20px rgba(0, 0, 0, 0.25),
        0 30px 60px -30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    position: relative;
}

.screen-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.data-visualization {
    position: relative;
    width: 150px;
    height: 150px;
}

.viz-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    border: 3px solid rgba(0, 212, 255, 0.6);
    border-radius: 50%;
    animation: pulse-ring 2s ease-out infinite;
}

.viz-circle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: rgba(0, 212, 255, 0.3);
    border-radius: 50%;
}

.viz-lines {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.viz-lines span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.8), transparent);
    transform-origin: center;
}

.viz-lines span:nth-child(1) { transform: translate(-50%, -50%) rotate(0deg); }
.viz-lines span:nth-child(2) { transform: translate(-50%, -50%) rotate(60deg); }
.viz-lines span:nth-child(3) { transform: translate(-50%, -50%) rotate(120deg); }

.device-reflection {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 40px;
    background: radial-gradient(ellipse, rgba(0, 113, 227, 0.2) 0%, transparent 70%);
    filter: blur(20px);
}

/* 客户Logo展示 */
.hero-clients {
    text-align: center;
    z-index: 2;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 1s var(--ease-out) 0.7s forwards;
}

.clients-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 20px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.clients-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.client-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-tertiary);
    opacity: 0.5;
    transition: opacity var(--duration-fast);
}

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

/* 滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--text-secondary), transparent);
    animation: scroll-line 2s ease-in-out infinite;
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: var(--section-padding) 24px;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-eyebrow {
    display: block;
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.015em;
}

/* ========================================
   产品展示 - 卡片网格
   ======================================== */
.section-products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 500px;
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-sm);
}

.product-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-card);
}

.product-featured {
    grid-column: span 2;
    flex-direction: row;
    align-items: center;
    min-height: 600px;
}

.product-wide {
    grid-column: span 2;
    flex-direction: row;
    align-items: center;
}

.product-content {
    flex: 1;
}

.product-featured .product-content,
.product-wide .product-content {
    max-width: 400px;
}

.product-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.product-name {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.015em;
}

.product-desc {
    font-size: 19px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 24px;
}

.product-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 17px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--duration-fast);
}

.product-link:hover {
    gap: 8px;
}

.product-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 40px;
}

.product-featured .product-visual,
.product-wide .product-visual {
    margin-top: 0;
    margin-left: 40px;
}

/* 水文监测视觉 */
.water-monitoring-visual {
    position: relative;
    width: 280px;
    height: 280px;
}

.wave-animation {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(180deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 113, 227, 0.3) 100%);
    border-radius: 0 0 140px 140px;
    overflow: hidden;
}

.wave-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 20px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z' fill='rgba(0, 113, 227, 0.3)'/%3E%3C/svg%3E");
    background-size: 50% 100%;
    animation: wave 3s linear infinite;
}

.data-points {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 16px;
}

.data-point {
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    animation: data-pulse 2s ease-in-out infinite;
}

.data-point:nth-child(2) { animation-delay: 0.3s; }
.data-point:nth-child(3) { animation-delay: 0.6s; }

/* 工业视觉 */
.industrial-visual {
    width: 150px;
    height: 150px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gear-icon {
    width: 80px;
    height: 80px;
    border: 4px solid var(--primary);
    border-radius: 50%;
    border-style: dashed;
    animation: rotate 10s linear infinite;
}

/* 环境视觉 */
.environment-visual {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.leaf-icon {
    width: 60px;
    height: 60px;
    background: #4caf50;
    border-radius: 0 50% 0 50%;
    transform: rotate(-45deg);
}

/* 集成视觉 */
.integrated-visual {
    position: relative;
    width: 250px;
    height: 200px;
}

.chip-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 2px solid var(--border);
}

.chip-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 4px;
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.connection-lines::before,
.connection-lines::after {
    content: '';
    position: absolute;
    background: var(--border);
}

.connection-lines::before {
    top: 50%;
    left: 20px;
    right: 20px;
    height: 2px;
}

.connection-lines::after {
    left: 50%;
    top: 20px;
    bottom: 20px;
    width: 2px;
}

/* ========================================
   解决方案 - 左右交替布局
   ======================================== */
.section-solutions {
    background: var(--bg-primary);
}

.solutions-showcase {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

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

.solution-reverse {
    direction: rtl;
}

.solution-reverse > * {
    direction: ltr;
}

.solution-image {
    position: relative;
}

.image-placeholder {
    aspect-ratio: 4/3;
    background: var(--bg-secondary);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-placeholder.large {
    aspect-ratio: 16/10;
}

.image-placeholder.water {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.image-placeholder.industry {
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
}

.image-placeholder.environment {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
}

.placeholder-icon {
    font-size: 80px;
    opacity: 0.8;
}

.solution-content {
    max-width: 480px;
}

.solution-category {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.solution-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.015em;
    margin-bottom: 20px;
}

.solution-desc {
    font-size: 19px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.solution-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 17px;
    font-weight: 500;
}

.solution-link:hover {
    text-decoration: underline;
}

/* ========================================
   技术优势
   ======================================== */
.section-technology {
    background: var(--bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 100px;
}

.tech-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-sm);
}

.tech-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.tech-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 24px;
    color: var(--primary);
}

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

.tech-name {
    font-size: 21px;
    font-weight: 600;
    margin-bottom: 12px;
}

.tech-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 统计数据 */
.tech-stats {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 60px;
}

.stat-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-value {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-suffix {
    font-size: 32px;
    font-weight: 600;
}

.stat-label {
    font-size: 15px;
    color: var(--text-secondary);
}

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

.cases-carousel {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.case-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.case-card:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-lg);
}

.case-featured {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.case-featured .case-image {
    aspect-ratio: 16/10;
}

.case-featured .case-content {
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.cases-grid .case-card {
    display: flex;
    flex-direction: column;
}

.cases-grid .case-image {
    aspect-ratio: 16/9;
}

.cases-grid .case-content {
    padding: 32px;
}

.case-image {
    overflow: hidden;
}

.case-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.case-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 12px;
    letter-spacing: -0.015em;
}

.case-featured .case-title {
    font-size: 32px;
}

.case-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 20px;
}

.case-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    margin-top: auto;
}

.case-link:hover {
    text-decoration: underline;
}

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

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    text-align: center;
    margin-bottom: 100px;
}

.about-text .section-title {
    margin-bottom: 24px;
}

.about-desc {
    font-size: 21px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto 60px;
}

.about-features {
    display: flex;
    justify-content: center;
    gap: 80px;
}

.about-feature {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.feature-label {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 合作伙伴 */
.about-partners {
    text-align: center;
}

.partners-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-tertiary);
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 60px;
}

.partner-logo {
    font-size: 21px;
    font-weight: 600;
    color: var(--text-tertiary);
    opacity: 0.6;
    transition: opacity var(--duration-fast);
}

.partner-logo:hover {
    opacity: 1;
}

/* ========================================
   CTA 区域
   ======================================== */
.section-cta {
    background: var(--bg-primary);
    padding: 120px 24px;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(40px, 6vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.015em;
    margin-bottom: 20px;
}

.cta-desc {
    font-size: 21px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--bg-secondary);
    padding: 60px 24px 24px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

/* 简化版页脚 */
.footer-simple {
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 60px;
}

.footer-contact-simple {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-value {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
}

.contact-value:hover {
    color: var(--accent-color);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.footer-logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.footer-tagline {
    font-size: 15px;
    color: var(--text-secondary);
}

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

.footer-column h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.footer-column a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-legal a:hover {
    text-decoration: underline;
}

/* ========================================
   动画
   ======================================== */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-ring {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

@keyframes data-pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
}

@keyframes wave {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

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

@keyframes scroll-line {
    0%, 100% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* 滚动触发动画 */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   深色主题特定样式
   ======================================== */

/* Hero 区域深色适配 */
[data-theme="dark"] .hero-v2 {
    background: var(--gradient-hero);
}

[data-theme="dark"] .hero-v2::before {
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.03) 0%, rgba(0, 212, 255, 0.06) 100%);
}

[data-theme="dark"] .hero-tag {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .title-sub {
    background: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] .btn-outline {
    border-color: var(--primary);
    color: var(--primary);
}

[data-theme="dark"] .btn-outline:hover {
    background: var(--primary);
    color: #0a0f1a;
}

[data-theme="dark"] .hero-image-main {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .center-core {
    background: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

[data-theme="dark"] .core-rings span {
    border-color: rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .node,
[data-theme="dark"] .r-node-inner {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .orbit {
    border-color: rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .orbit-1 {
    background: radial-gradient(circle, transparent 30%, rgba(0, 212, 255, 0.08) 100%);
}

[data-theme="dark"] .r-line-base {
    stroke: rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .r-line-flow {
    stroke: url(#radialGradDark);
}

[data-theme="dark"] .r-arc {
    stroke: rgba(0, 212, 255, 0.15);
}

[data-theme="dark"] .r-arc-flow {
    stroke: url(#radialGradDark);
}

[data-theme="dark"] .particle {
    background: radial-gradient(circle, #00d4ff 0%, rgba(0, 212, 255, 0.3) 100%);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

[data-theme="dark"] .flow-dot {
    background: #00ff88;
    box-shadow: 0 0 8px rgba(0, 255, 136, 0.6);
}

[data-theme="dark"] .core-glow {
    background: radial-gradient(circle, rgba(0, 212, 255, 0.4) 0%, transparent 70%);
}

[data-theme="dark"] .r-node-inner {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 212, 255, 0.2);
}

[data-theme="dark"] .r-node:hover .r-node-inner {
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2), 0 0 0 2px rgba(0, 212, 255, 0.3);
}

[data-theme="dark"] .info-float-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .float-card-img {
    filter: brightness(0.95) contrast(1.1);
    border-radius: 6px;
}

[data-theme="dark"] .product-entry {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 深色主题导航栏适配 */
[data-theme="dark"] .navbar {
    background: rgba(10, 15, 26, 0.85);
    border-bottom-color: rgba(0, 212, 255, 0.15);
}

[data-theme="dark"] .nav-link {
    color: #e2e8f0;
}

[data-theme="dark"] .nav-link:hover {
    color: #00d4ff;
}

[data-theme="dark"] .product-entry:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 12px 24px rgba(0, 212, 255, 0.1);
}

/* 产品卡片深色适配 */
[data-theme="dark"] .product-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .product-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

[data-theme="dark"] .highlight-section {
    background: rgba(0, 212, 255, 0.05);
}

/* 技术栈卡片深色适配 */
[data-theme="dark"] .tech-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .tech-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

[data-theme="dark"] .tech-stats {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 重点产品卡片深色适配（3D翻转版） */
[data-theme="dark"] .fp3-front {
    background: #0f172a;
    border-color: rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .fp3-tag {
    background: #0a1628;
    border-color: rgba(0, 212, 255, 0.12);
    color: #a0aec0;
}

[data-theme="dark"] .fp3-hint {
    color: #64748b;
}

[data-theme="dark"] .solution-card-contact {
    border-color: rgba(0, 212, 255, 0.3);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.04), rgba(0, 212, 255, 0.06));
}

/* 解决方案卡片深色适配 */
[data-theme="dark"] .solution-card {
    background: #0f172a;
    border-color: rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .solution-card:hover {
    border-color: rgba(0, 212, 255, 0.25);
}

[data-theme="dark"] .solution-card-tags span {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.18);
}

/* 研发能力卡片深色适配 */
[data-theme="dark"] .rnd-card {
    background: #0f172a;
    border-color: rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .rnd-card:hover {
    border-color: rgba(0, 212, 255, 0.25);
}

[data-theme="dark"] .rnd-card-icon {
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary);
}

/* 保障体系卡片深色适配 */
[data-theme="dark"] .trust-card {
    background: #0f172a;
    border-color: rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .trust-card:hover {
    border-color: rgba(0, 212, 255, 0.25);
}

[data-theme="dark"] .trust-card-primary {
    border-color: rgba(0, 212, 255, 0.3);
    background: rgba(0, 212, 255, 0.04);
}

[data-theme="dark"] .trust-icon {
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary);
}

[data-theme="dark"] .trust-list li::before {
    color: var(--primary);
}

/* 案例卡片深色适配 */
[data-theme="dark"] .case-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 案例展示V2 - 2列网格布局 */
.cases-grid-v2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.case-card-v2 {
    background: var(--bg-secondary);
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
    display: flex;
    flex-direction: column;
}

.case-card-v2:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-image-v2 {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--gradient-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-image-v2 .image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 198, 255, 0.1) 100%);
}

.case-image-v2 .placeholder-icon {
    font-size: 48px;
    opacity: 0.8;
}

.case-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

[data-theme="dark"] .case-card-img {
    filter: brightness(0.95) contrast(1.05);
}

.case-content-v2 {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-content-v2 .case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 113, 227, 0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    width: fit-content;
}

.case-content-v2 .case-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.case-content-v2 .case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

[data-theme="dark"] .case-card-v2 {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .case-content-v2 .case-tag {
    background: rgba(0, 212, 255, 0.1);
}

@media (max-width: 768px) {
    .cases-grid-v2 {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

[data-theme="dark"] .story-card {
    background: #0f172a;
}

/* 新闻区域深色适配 */
[data-theme="dark"] .news-category {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 联系表单深色适配 */
[data-theme="dark"] .contact-form-wrapper,
[data-theme="dark"] .info-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 212, 255, 0.2);
    color: var(--text-primary);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group textarea:focus {
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.05);
}

/* 页脚深色适配 */
[data-theme="dark"] .footer {
    background: #05080f;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

/* 解决方案深色适配 */
[data-theme="dark"] .solution-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .solution-card::before {
    background: linear-gradient(90deg, #00d4ff, #00ff88);
}

[data-theme="dark"] .solution-card.highlight {
    background: rgba(0, 212, 255, 0.05);
    border-color: rgba(0, 212, 255, 0.3);
}

/* 统计区域深色适配 */
[data-theme="dark"] .stats-section {
    background: rgba(0, 212, 255, 0.03);
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 关于我们深色适配 */
[data-theme="dark"] .about-card {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .about-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .cert-item {
    background: rgba(0, 212, 255, 0.05);
}

/* 服务项深色适配 */
[data-theme="dark"] .service-item,
[data-theme="dark"] .dev-item {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .service-item:hover,
[data-theme="dark"] .dev-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

/* 合作伙伴深色适配 */
[data-theme="dark"] .partner-logo {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

[data-theme="dark"] .partner-logo:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

/* 安全卡片深色适配 */
[data-theme="dark"] .security-card,
[data-theme="dark"] .rd-card,
[data-theme="dark"] .rd-highlight {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* 政策内容深色适配 */
[data-theme="dark"] .policy-highlight {
    background: rgba(0, 212, 255, 0.05);
    border-left-color: var(--primary);
}

/* 滚动条深色适配 */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #0a0f1a;
}

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

/* 选择文本深色适配 */
[data-theme="dark"] ::selection {
    background: rgba(0, 212, 255, 0.3);
    color: #ffffff;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .hero-v2 {
        grid-template-columns: 1fr;
        padding: calc(var(--nav-height) + 40px) 40px 40px;
    }
    
    .hero-left {
        padding-right: 0;
        text-align: center;
        align-items: center;
    }
    
    .hero-desc-v2 {
        max-width: 100%;
    }
    
    .hero-metrics {
        justify-content: center;
    }
    
    .hero-right {
        order: -1;
        min-height: 400px;
    }
    
    .hero-image-wrapper {
        max-width: 400px;
    }
    
    .hero-products-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .info-float-card {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-featured,
    .product-wide {
        grid-column: span 1;
        flex-direction: column;
    }
    
    .product-featured .product-visual,
    .product-wide .product-visual {
        margin-left: 0;
        margin-top: 40px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 20px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-featured {
        grid-template-columns: 1fr;
    }
    
    .case-featured .case-content {
        padding: 40px;
    }
    
    .solution-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .solution-reverse {
        direction: ltr;
    }
    
    .about-features {
        gap: 40px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 100px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-actions {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* Hero V2 移动端适配 */
    .hero-v2 {
        padding: calc(var(--nav-height) + 30px) 24px 30px;
        gap: 30px;
    }
    
    .hero-left {
        text-align: center;
    }
    
    .hero-tag {
        margin: 0 auto 20px;
        font-size: 12px;
        padding: 6px 14px;
    }
    
    .title-main,
    .title-sub {
        font-size: 40px;
    }
    
    .hero-desc-v2 {
        font-size: 16px;
        margin-bottom: 24px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 32px;
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .hero-metrics {
        justify-content: center;
        gap: 24px;
    }
    
    .metric-value {
        font-size: 24px;
    }
    
    .metric-label {
        font-size: 12px;
    }
    
    .hero-right {
        min-height: 350px;
    }
    
    .hero-image-wrapper {
        max-width: 320px;
    }
    
    .visual-center {
        width: 100px;
        height: 100px;
    }
    
    .center-core {
        width: 50px;
        height: 50px;
    }
    
    .core-rings span:nth-child(1) { width: 70px; height: 70px; }
    .core-rings span:nth-child(2) { width: 90px; height: 90px; }
    .core-rings span:nth-child(3) { width: 110px; height: 110px; }
    
    .node,
    .r-node-inner {
        padding: 10px 14px;
    }
    
    .node-icon,
    .r-node-inner .node-icon {
        font-size: 18px;
    }
    
    .node-text,
    .r-node-inner .node-text {
        font-size: 10px;
    }
    
    .orbit-1 {
        width: 100px;
        height: 100px;
    }
    
    .orbit-2 {
        width: 160px;
        height: 160px;
    }
    
    .orbit-3 {
        width: 220px;
        height: 220px;
    }
    
    .r-node-1 { top: 5%; }
    .r-node-2 { right: 2%; }
    .r-node-3 { bottom: 5%; }
    .r-node-4 { left: 2%; }
    
    .hero-products-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-top: 10px;
    }
    
    .product-entry {
        padding: 16px;
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .entry-icon {
        font-size: 28px;
    }
    
    .entry-name {
        font-size: 14px;
    }
    
    .entry-desc {
        font-size: 12px;
    }
    
    .product-card {
        padding: 32px;
        min-height: auto;
    }
    
    .product-name {
        font-size: 24px;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-value {
        font-size: 32px;
    }
    
    .about-features {
        flex-direction: column;
        gap: 32px;
    }
    
    .partners-logos {
        gap: 32px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 80px 20px;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .hero-v2 {
        padding: calc(var(--nav-height) + 20px) 16px 20px;
    }
    
    .title-main,
    .title-sub {
        font-size: 32px;
    }
    
    .hero-desc-v2 {
        font-size: 14px;
    }
    
    .hero-metrics {
        flex-direction: column;
        gap: 16px;
    }
    
    .metric-item {
        flex-direction: row;
        align-items: center;
        gap: 8px;
    }
    
    .hero-right {
        min-height: 300px;
    }
    
    .hero-image-wrapper {
        max-width: 280px;
    }
    
    .hero-products-bar {
        grid-template-columns: 1fr;
    }
    
    .product-entry {
        flex-direction: row;
        text-align: left;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .product-card {
        padding: 24px;
    }
    
    .tech-stats {
        padding: 40px 24px;
    }
}

/* ====================================
   首页四大重点产品展示区（3D翻转卡片）
   ==================================== */
.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.featured-products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
    perspective: 1200px;
}

/* 3D翻转卡片容器 */
.fp3-card {
    height: 440px;
    cursor: pointer;
    perspective: 800px;
}

.fp3-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.34, 1.3, 0.64, 1);
    border-radius: 20px;
}

.fp3-card:hover .fp3-inner {
    transform: rotateY(180deg);
}

/* 正面 */
.fp3-front,
.fp3-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 20px;
    overflow: hidden;
}

.fp3-front {
    background: var(--bg-primary);
    border: 1px solid var(--border-color, var(--border));
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.fp3-img-wrap {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.fp3-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.fp3-card:hover .fp3-img {
    transform: scale(1.06);
}

.fp3-icon-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 72px;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary, var(--bg-secondary)));
}

.fp3-gradient-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.fp3-front-body {
    padding: 18px 20px 8px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.fp3-category {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.fp3-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.fp3-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 4px;
}

.fp3-tag {
    font-size: 10px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color, var(--border));
    border-radius: 5px;
    padding: 2px 7px;
}

.fp3-hint {
    padding: 10px 20px 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* 背面 */
.fp3-back {
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 28px;
    gap: 16px;
    color: white;
    text-align: center;
}

.fp3-back-icon {
    font-size: 52px;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.2));
    animation: fp3-float 3s ease-in-out infinite;
}

@keyframes fp3-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.fp3-back-name {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.3;
    color: #fff;
}

.fp3-back-desc {
    font-size: 13px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.88);
    flex: 1;
}

.fp3-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    background: rgba(255, 255, 255, 0.2);
    border: 1.5px solid rgba(255, 255, 255, 0.6);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    backdrop-filter: blur(4px);
    transition: background 0.2s, transform 0.2s;
}

.fp3-card:hover .fp3-back-btn {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.04);
}

.products-cta {
    text-align: center;
    margin-top: 40px;
}

/* ====================================
   六大解决方案卡片网格
   ==================================== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.solution-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 32px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.solution-card-icon {
    font-size: 36px;
    line-height: 1;
}

.solution-card-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.solution-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

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

.solution-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.solution-card-tags span {
    font-size: 11px;
    font-weight: 500;
    color: var(--primary);
    background: rgba(0, 113, 227, 0.08);
    border-radius: 6px;
    padding: 3px 10px;
    border: 1px solid rgba(0, 113, 227, 0.2);
}

/* "更多详情方案"联系卡片 */
.solution-card-contact {
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.04) 0%, rgba(66, 165, 245, 0.06) 100%);
    border: 2px dashed rgba(0, 113, 227, 0.3);
    position: relative;
    overflow: hidden;
}

.solution-card-contact::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.06), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.solution-card-contact:hover::before {
    opacity: 1;
}

.solution-contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    align-self: flex-start;
}

.solution-contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 113, 227, 0.35);
}

/* ====================================
   研发能力板块
   ==================================== */
.section-rnd {
    background: var(--bg-primary);
}

.rnd-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.rnd-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 36px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    border: 1px solid var(--border-color);
    transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

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

.rnd-card-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    background: rgba(0, 113, 227, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    color: var(--primary);
}

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

.rnd-card-content {
    flex: 1;
}

.rnd-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.rnd-card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====================================
   数据安全与可靠性保障板块
   ==================================== */
.section-trust {
    background: var(--bg-secondary);
}

.trust-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.trust-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 36px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.trust-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.trust-card-primary {
    border-color: var(--primary);
    background: rgba(0, 113, 227, 0.03);
}

.trust-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

.trust-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: rgba(0, 113, 227, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    color: var(--primary);
}

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

.trust-card-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.trust-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.trust-list li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
}

.trust-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
}

/* ====================================
   响应式适配：新板块
   ==================================== */
@media (max-width: 1100px) {
    .featured-products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .featured-products-grid {
        grid-template-columns: 1fr 1fr;
    }
    .fp3-card {
        height: 400px;
    }
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    .rnd-grid {
        grid-template-columns: 1fr;
    }
    .trust-layout {
        grid-template-columns: 1fr;
    }
    .rnd-card {
        flex-direction: column;
        gap: 16px;
    }
    .section-subtitle {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .featured-products-grid {
        grid-template-columns: 1fr;
    }
    .fp3-card {
        height: 420px;
    }
}