/* ===== 基础变量 ===== */
:root {
    --bg: #030508;
    --bg-elevated: #0a0c10;
    --bg-card: #0f1218;
    --bg-card-hover: #161a22;
    --border: rgba(255,255,255,0.06);
    --border-light: rgba(255,255,255,0.03);
    
    --text: #f0f2f5;
    --text-secondary: #9aa3b2;
    --text-muted: #5e6675;
    
    --cyan: #00d4ff;
    --cyan-dim: rgba(0,212,255,0.15);
    --purple: #8b5cf6;
    --purple-dim: rgba(139,92,246,0.15);
    --blue: #3b82f6;
    
    --radius: 12px;
    --radius-sm: 6px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 & 基础 ===== */
*, *::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);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

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

/* ===== 渐变文字 ===== */
.gradient-text {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    gap: 8px;
    font-family: inherit;
    letter-spacing: 0.02em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 100%);
    color: #000;
    font-weight: 600;
    box-shadow: 0 4px 24px rgba(0,212,255,0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,212,255,0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    background: var(--cyan-dim);
}

/* ===== 导航 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(3, 5, 8, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.logo-mark {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: #000;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

.nav-link:hover {
    color: var(--text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--cyan);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 1px;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, var(--bg) 70%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 32px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--cyan);
    font-weight: 500;
    margin-bottom: 32px;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.2rem, 5.5vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-desc {
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    opacity: 0.5;
}

.mouse {
    width: 22px;
    height: 34px;
    border: 1.5px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 3px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

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

/* ===== 通用板块标题 ===== */
.section-header {
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--cyan);
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* ===== 关于我们 ===== */
.about {
    padding: 140px 0;
    background: var(--bg);
}

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

.about-text {
    max-width: 520px;
}

.about-lead {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 24px;
    line-height: 1.6;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.about-stat {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.about-stat-num {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cyan);
}

.about-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 微观结构视觉 */
.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.micro-structure {
    width: 320px;
    height: 320px;
    position: relative;
    perspective: 800px;
}

.micro-layer {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid var(--border);
    animation: microPulse 6s ease-in-out infinite;
}

.micro-layer.layer-1 {
    animation-delay: 0s;
}

.micro-layer.layer-2 {
    inset: 40px;
    animation-delay: -2s;
}

.micro-layer.layer-3 {
    inset: 80px;
    animation-delay: -4s;
}

@keyframes microPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; border-color: var(--border); }
    50% { transform: scale(1.05); opacity: 0.6; border-color: var(--cyan-dim); }
}

.micro-nodes {
    position: absolute;
    inset: 0;
}

.micro-nodes span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--cyan-dim);
    animation: nodeFloat 4s ease-in-out infinite;
}

.micro-nodes span:nth-child(1) { top: 20%; left: 30%; animation-delay: 0s; }
.micro-nodes span:nth-child(2) { top: 35%; left: 70%; animation-delay: -0.5s; }
.micro-nodes span:nth-child(3) { top: 50%; left: 20%; animation-delay: -1s; }
.micro-nodes span:nth-child(4) { top: 60%; left: 75%; animation-delay: -1.5s; }
.micro-nodes span:nth-child(5) { top: 75%; left: 45%; animation-delay: -2s; }
.micro-nodes span:nth-child(6) { top: 25%; left: 55%; animation-delay: -2.5s; }
.micro-nodes span:nth-child(7) { top: 45%; left: 85%; animation-delay: -3s; }
.micro-nodes span:nth-child(8) { top: 70%; left: 25%; animation-delay: -3.5s; }
.micro-nodes span:nth-child(9) { top: 80%; left: 60%; animation-delay: -4s; }

@keyframes nodeFloat {
    0%, 100% { transform: translate(0, 0); opacity: 0.6; }
    50% { transform: translate(5px, -5px); opacity: 1; }
}

/* ===== 技术平台 ===== */
.technology {
    padding: 140px 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    transition: var(--transition);
}

.tech-card:hover {
    border-color: var(--cyan-dim);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

.tech-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.tech-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--cyan-dim), var(--purple-dim));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
}

.tech-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.tech-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 28px;
    line-height: 1.7;
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.tech-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tech-dot {
    width: 6px;
    height: 6px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--cyan-dim);
    flex-shrink: 0;
}

.tech-divider {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 80px;
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.tech-divider-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.tech-process {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.process-step {
    text-align: center;
    flex: 1;
}

.process-num {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
}

.process-step h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.process-arrow {
    width: 32px;
    height: 1px;
    background: linear-gradient(90deg, var(--border), var(--cyan-dim), var(--border));
    flex-shrink: 0;
    position: relative;
}

.process-arrow::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    width: 7px;
    height: 7px;
    border-top: 1px solid var(--cyan-dim);
    border-right: 1px solid var(--cyan-dim);
    transform: rotate(45deg);
}

/* ===== 应用场景 ===== */
.applications {
    padding: 140px 0;
    background: var(--bg);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.app-card:hover {
    border-color: var(--cyan-dim);
    transform: translateY(-4px);
}

.app-card.app-wide {
    grid-column: span 2;
}

.app-visual {
    width: 56px;
    height: 56px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
    margin-bottom: 24px;
    position: relative;
}

.app-pulse {
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--cyan);
    opacity: 0;
    animation: appPulse 3s ease-in-out infinite;
}

@keyframes appPulse {
    0%, 100% { opacity: 0; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(1.05); }
}

.app-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.app-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 智能制造 ===== */
.intelligent {
    padding: 140px 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

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

.intelligent-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.data-flow {
    display: flex;
    align-items: center;
    gap: 8px;
}

.flow-node {
    width: 64px;
    height: 64px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flow-ring {
    position: absolute;
    inset: 0;
    border: 1.5px solid var(--border);
    border-radius: 50%;
    animation: flowRing 3s ease-in-out infinite;
}

.flow-core {
    width: 12px;
    height: 12px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--cyan-dim);
    animation: flowCore 3s ease-in-out infinite;
}

.flow-node:nth-child(1) .flow-ring,
.flow-node:nth-child(1) .flow-core { animation-delay: 0s; }
.flow-node:nth-child(3) .flow-ring,
.flow-node:nth-child(3) .flow-core { animation-delay: 0.5s; }
.flow-node:nth-child(5) .flow-ring,
.flow-node:nth-child(5) .flow-core { animation-delay: 1s; }
.flow-node:nth-child(7) .flow-ring,
.flow-node:nth-child(7) .flow-core { animation-delay: 1.5s; }

@keyframes flowRing {
    0%, 100% { transform: scale(1); opacity: 0.3; border-color: var(--border); }
    50% { transform: scale(1.3); opacity: 0.6; border-color: var(--cyan); }
}

@keyframes flowCore {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.3); opacity: 1; }
}

.flow-connector {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, var(--border), var(--cyan-dim), var(--border));
    position: relative;
}

.flow-connector::after {
    content: '';
    position: absolute;
    right: 0;
    top: -2px;
    width: 5px;
    height: 5px;
    border-top: 1px solid var(--cyan-dim);
    border-right: 1px solid var(--cyan-dim);
    transform: rotate(45deg);
}

.flow-node::before {
    content: attr(data-label);
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    letter-spacing: 0.05em;
}

.intelligent-text {
    max-width: 480px;
}

.intelligent-lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 40px;
    line-height: 1.6;
}

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

.if-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.if-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
    flex-shrink: 0;
}

.if-text h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.if-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== 新闻动态 ===== */
.news {
    padding: 140px 0;
    background: var(--bg);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 32px;
    transition: var(--transition);
    display: flex;
    gap: 24px;
}

.news-card:hover {
    border-color: var(--cyan-dim);
    transform: translateY(-4px);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 56px;
}

.news-month {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.news-day {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--cyan);
}

.news-category {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--cyan);
    margin-bottom: 14px;
}

.news-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 联系我们 ===== */
.contact {
    padding: 100px 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
}

.contact-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.contact-text {
    max-width: 400px;
}

.contact-text h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    margin: 16px 0 16px;
    letter-spacing: -0.02em;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-item svg {
    color: var(--cyan);
    flex-shrink: 0;
}

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

.footer-main {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 280px;
}

.footer-nav {
    display: flex;
    gap: 80px;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

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

.footer-col a {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-col a:hover {
    color: var(--cyan);
}

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */

/* 触摸友好：最小点击区域 */
.btn,
.nav-link,
.nav-toggle,
.news-list-readmore,
.footer-col a,
.contact-item,
.news-content a,
.app-card,
.tech-card {
    min-height: 44px;
}

.nav-link,
.footer-col a,
.contact-item,
.news-content a {
    display: inline-flex;
    align-items: center;
}

/* 确保移动端点击区域 */
a, button {
    -webkit-tap-highlight-color: transparent;
}

a:focus,
button:focus {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
}

@media (max-width: 1024px) {
    .about-content,
    .intelligent-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-visual,
    .intelligent-visual {
        order: -1;
    }
    
    .about-stats {
        gap: 32px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .app-card.app-wide {
        grid-column: span 2;
    }
    
    .app-card {
        padding: 28px 24px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-process {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .process-arrow {
        display: none;
    }
    
    .process-step {
        min-width: 140px;
        margin-bottom: 30px;
    }
    
    .section-header {
        margin-bottom: 60px;
    }
    
    .about,
    .technology,
    .applications,
    .intelligent,
    .news {
        padding: 100px 0;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-elevated);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        transition: var(--transition);
        border-left: 1px solid var(--border);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .app-card.app-wide {
        grid-column: span 1;
    }
    
    .app-card {
        padding: 24px 20px;
    }
    
    .intelligent-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .data-flow {
        flex-direction: column;
        gap: 40px;
    }
    
    .flow-connector {
        width: 1px;
        height: 30px;
        background: linear-gradient(180deg, var(--border), var(--cyan-dim), var(--border));
    }
    
    .flow-connector::after {
        right: -3px;
        top: auto;
        bottom: 0;
        transform: rotate(135deg);
    }
    
    .flow-node::before {
        bottom: auto;
        top: -28px;
    }
    
    .contact-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 40px;
    }
    
    .contact {
        padding: 80px 0;
    }
    
    .footer-main {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-nav {
        gap: 32px;
        flex-wrap: wrap;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .micro-structure {
        width: 240px;
        height: 240px;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .about,
    .technology,
    .applications,
    .intelligent,
    .news {
        padding: 80px 0;
    }
    
    .about-content,
    .intelligent-content {
        gap: 40px;
    }
    
    .about-stats {
        margin-top: 32px;
        padding-top: 28px;
        gap: 20px;
    }
    
    .about-stat-num {
        font-size: 1.1rem;
    }
    
    .about-stat-label {
        font-size: 0.85rem;
    }
    
    .tech-card {
        padding: 36px 28px;
    }
    
    .tech-card-header {
        gap: 12px;
    }
    
    .tech-icon {
        width: 44px;
        height: 44px;
    }
    
    .tech-card h3 {
        font-size: 1.15rem;
    }
    
    .news-card {
        padding: 28px 24px;
        gap: 16px;
    }
    
    .news-card-image {
        min-height: 160px;
    }
    
    .news-content h3 {
        font-size: 0.95rem;
    }
    
    .news-content p {
        font-size: 0.85rem;
    }
    
    .hero-tag {
        font-size: 0.78rem;
        padding: 6px 16px;
        margin-bottom: 24px;
    }
}

@media (max-width: 480px) {
    .about-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .about-stat-num {
        font-size: 1rem;
    }
    
    .about-stat-label {
        font-size: 0.8rem;
    }
    
    .tech-card {
        padding: 28px 20px;
    }
    
    .tech-card h3 {
        font-size: 1.05rem;
    }
    
    .tech-desc {
        font-size: 0.88rem;
        margin-bottom: 20px;
    }
    
    .tech-list li {
        font-size: 0.85rem;
    }
    
    .news-card {
        flex-direction: column;
        gap: 16px;
        padding: 24px 20px;
    }
    
    .news-date {
        flex-direction: row;
        gap: 8px;
        align-items: baseline;
    }
    
    .news-content h3 {
        font-size: 0.9rem;
    }
    
    .news-content p {
        font-size: 0.82rem;
    }
    
    .app-card {
        padding: 20px 16px;
    }
    
    .app-visual {
        width: 48px;
        height: 48px;
        margin-bottom: 18px;
    }
    
    .app-card h3 {
        font-size: 1rem;
    }
    
    .app-card p {
        font-size: 0.82rem;
    }
    
    .intelligent-lead {
        font-size: 1.05rem;
        margin-bottom: 28px;
    }
    
    .if-item {
        gap: 10px;
    }
    
    .if-icon {
        width: 36px;
        height: 36px;
    }
    
    .if-text h4 {
        font-size: 0.88rem;
    }
    
    .if-text p {
        font-size: 0.78rem;
    }
    
    .contact-text h2 {
        font-size: 1.4rem;
    }
    
    .contact-text p {
        font-size: 0.88rem;
    }
    
    .contact-item {
        font-size: 0.85rem;
    }
    
    .footer-brand p {
        font-size: 0.85rem;
    }
    
    .footer-col h4 {
        font-size: 0.8rem;
        margin-bottom: 16px;
    }
    
    .footer-col a {
        font-size: 0.8rem;
    }
    
    .section-header {
        margin-bottom: 36px;
    }
    
    .about,
    .technology,
    .applications,
    .intelligent,
    .news {
        padding: 60px 0;
    }
    
    .about-lead {
        font-size: 1.1rem;
    }
    
    .about-text p {
        font-size: 0.88rem;
    }
    
    .micro-structure {
        width: 200px;
        height: 200px;
    }
    
    .micro-layer.layer-2 {
        inset: 30px;
    }
    
    .micro-layer.layer-3 {
        inset: 60px;
    }
    
    .process-step {
        min-width: 120px;
    }
    
    .process-num {
        font-size: 2rem;
    }
    
    .process-step h4 {
        font-size: 0.9rem;
    }
    
    .process-step p {
        font-size: 0.8rem;
    }
    
    .hero-title {
        font-size: clamp(1.8rem, 8vw, 2.2rem);
    }
    
    .hero-desc {
        font-size: clamp(0.9rem, 3vw, 1rem);
        margin-bottom: 36px;
    }
    
    .hero-tag {
        font-size: 0.72rem;
        padding: 5px 14px;
        margin-bottom: 20px;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .nav-container {
        padding: 0 20px;
    }
    
    .hero-content {
        padding: 0 20px;
    }
}