/**
 * 九阁网趣科技有限公司官网 - 主样式文件
 * 
 * 文件名: style.css
 * 描述: Dark Mode暗黑炫酷科技风样式
 * 创建时间: 2026-03-14
 * 
 * @author 九阁网趣科技有限公司
 * @version 1.0
 */

/* ============================================
   1. CSS变量定义
   ============================================ */
:root {
    /* Dark Mode配色体系 */
    --bg-primary: #0A0E17;      /* 主背景 - 深空黑 */
    --bg-secondary: #121826;    /* 次级背景 - 暗灰 */
    --bg-card: rgba(18, 24, 38, 0.8);  /* 卡片背景 */
    
    /* 主题色 */
    --color-primary: #007AFF;   /* 霓虹科技蓝 */
    --color-accent: #00E0FF;    /* 荧光青 - 高亮 */
    
    /* 文字色 */
    --text-primary: #E2E8F0;    /* 主文字 - 浅灰 */
    --text-secondary: #94A3B8;  /* 次要文字 - 深灰 */
    --text-muted: #64748B;      /* 弱化文字 */
    
    /* 边框与装饰 */
    --border-color: rgba(148, 163, 184, 0.2);
    --border-glow: rgba(0, 224, 255, 0.1);
    --glow-accent: rgba(0, 224, 255, 0.3);
    
    /* 间距 */
    --section-spacing: 100px;
    --container-max-width: 1200px;
    --card-radius: 8px;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   2. 基础重置与全局样式
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* 选中文字样式 */
::selection {
    background: var(--color-accent);
    color: var(--bg-primary);
}

/* 容器 */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   3. 粒子背景
   ============================================ */
.particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

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

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    width: 140px;
    height: 45px;
    object-fit: contain;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: var(--transition-fast);
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

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

/* 移动端导航切换按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   5. 按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--card-radius);
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    font-family: inherit;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    box-shadow: 0 4px 20px rgba(0, 224, 255, 0.3);
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 30px rgba(0, 224, 255, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(0, 224, 255, 0.1);
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(0, 224, 255, 0.2);
}

/* ============================================
   6. 通用标题样式
   ============================================ */
.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.text-highlight {
    color: var(--color-accent);
}

/* ============================================
   7. Hero首屏区
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 0.7fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-title .highlight {
    color: var(--color-accent);
    text-shadow: 0 0 30px rgba(0, 224, 255, 0.3);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

/* 代码预览区 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-preview {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.code-header {
    background: rgba(0, 0, 0, 0.3);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #28c840; }

.code-filename {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-muted);
}

.code-content {
    padding: 20px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content pre {
    margin: 0;
}

.code-keyword { color: #ff79c6; }
.code-variable { color: #f8f8f2; }
.code-property { color: #8be9fd; }
.code-string { color: #f1fa8c; }
.code-function { color: #50fa7b; }

/* 科技仪表板 */
.tech-dashboard {
    background: linear-gradient(135deg, rgba(18, 24, 38, 0.95) 0%, rgba(10, 14, 23, 0.98) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.dashboard-header {
    background: linear-gradient(90deg, rgba(0, 122, 255, 0.15) 0%, rgba(0, 224, 255, 0.05) 100%);
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1.5px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: #00E0FF;
    border-radius: 50%;
    box-shadow: 0 0 10px #00E0FF;
    animation: pulse 2s infinite;
}

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

.dashboard-time {
    font-size: 11px;
    color: var(--color-accent);
    font-weight: 500;
    letter-spacing: 1px;
}

.dashboard-content {
    padding: 30px 24px;
}

.metric-row {
    display: flex;
    gap: 30px;
    margin-bottom: 24px;
}

.metric-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.metric-label {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    font-weight: 500;
}

.metric-value {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 600;
}

.metric-item.wide {
    flex: 2;
}

.delivery-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(0, 224, 255, 0.1);
    border: 1px solid rgba(0, 224, 255, 0.2);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    color: var(--color-accent);
    font-weight: 500;
}

.status-active {
    color: #00E0FF;
}

.stack-icon {
    color: var(--color-accent);
    font-size: 10px;
}

/* Hero品牌标识 */
.hero-brand {
    position: absolute;
    bottom: 40px;
    right: 40px;
    z-index: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.hero-brand.hidden {
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

.brand-mark {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--text-muted);
    opacity: 0.5;
}

/* 滚动提示箭头 - 双三角推进 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    opacity: 0;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.scroll-indicator.visible {
    opacity: 1;
}

.scroll-indicator.hidden {
    opacity: 0;
    visibility: hidden;
}

.scroll-arrows {
    position: relative;
    width: 20px;
    height: 32px;
}

.scroll-arrow-item {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--text-muted);
    opacity: 0.25;
    animation: arrowPush 2.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.scroll-arrow-item:nth-child(1) {
    top: 0;
    animation-delay: 0s;
}

.scroll-arrow-item:nth-child(2) {
    top: 12px;
    animation-delay: 0.5s;
}

@keyframes arrowPush {
    0% {
        opacity: 0.15;
        transform: translateY(0);
    }
    40% {
        opacity: 0.45;
    }
    80% {
        opacity: 0.15;
        transform: translateY(6px);
    }
    100% {
        opacity: 0.15;
        transform: translateY(0);
    }
}

/* ============================================
   8. 企业品牌简介区
   ============================================ */
.about {
    padding: var(--section-spacing) 0;
    position: relative;
}

.about-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 60px;
    box-shadow: inset 0 0 60px var(--border-glow);
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.about-left {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 20px;
    min-width: 200px;
}

.about-logo {
    width: 180px;
    height: 180px;
    object-fit: contain;
    opacity: 0.9;
}

.about-slogan {
    margin-top: 20px;
    font-size: 14px;
    color: var(--color-accent);
    letter-spacing: 2px;
    text-align: center;
    font-weight: 500;
}

.about-right {
    flex: 1;
}

.about-title {
    text-align: left;
    margin-bottom: 30px;
}

.about-text-content {
    text-align: left;
}

.about-text {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-text:last-child {
    margin-bottom: 0;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   9. 全业务范围区
   ============================================ */
.services {
    padding: var(--section-spacing) 0;
}

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

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition-normal);
}

.service-card:hover {
    border-color: var(--color-accent);
    background: rgba(18, 24, 38, 0.95);
    transform: translateY(-5px);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 24px;
    color: var(--color-accent);
}

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

.service-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   10. 自研技术工具展示区
   ============================================ */
.tools {
    padding: var(--section-spacing) 0;
}

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

.tools-desc {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.tools-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--text-primary);
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: white;
    flex-shrink: 0;
}

/* 工具预览图 */
.tool-preview {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.tool-header {
    background: rgba(0, 0, 0, 0.3);
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.tool-badge {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.tool-body {
    display: flex;
    height: 280px;
}

.tool-sidebar {
    width: 100px;
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    border-right: 1px solid var(--border-color);
}

.tool-item {
    padding: 12px 20px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.tool-item:hover,
.tool-item.active {
    color: var(--color-accent);
    background: rgba(0, 224, 255, 0.1);
}

.tool-canvas {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.canvas-placeholder {
    width: 100%;
    height: 100%;
    border: 2px dashed var(--border-color);
    border-radius: var(--card-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* ============================================
   11. 项目案例展示区
   ============================================ */
.cases {
    padding: var(--section-spacing) 0;
}

/* 案例展示 - 大图+详情布局 */
.case-showcase {
    display: flex;
    gap: 60px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.case-showcase-left {
    flex: 1.2;
    background: linear-gradient(135deg, #c0392b 0%, #e74c3c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    min-height: 400px;
}

.case-image-large {
    width: 100%;
    max-width: 500px;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.case-image-large img {
    width: 100%;
    height: auto;
    display: block;
}

.case-showcase-right {
    flex: 1;
    padding: 50px 50px 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-header {
    margin-bottom: 30px;
}

.case-showcase-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.case-subtitle {
    font-size: 16px;
    color: var(--color-accent);
    font-weight: 500;
}

.case-meta {
    display: flex;
    gap: 50px;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.case-meta-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.case-meta-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.case-meta-value {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
}

.case-color-dot {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: inline-block;
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.4);
}

.case-showcase-desc {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-secondary);
}
}

.case-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--color-accent);
    color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.case-label {
    position: absolute;
    bottom: 12px;
    left: 12px;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.case-info {
    padding: 24px;
}

.case-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   12. 底部行动+版权区
   ============================================ */
.footer {
    margin-top: var(--section-spacing);
}

.footer-cta {
    background: var(--bg-secondary);
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.cta-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 40px;
    color: var(--text-primary);
}

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

/* 联系信息区 */
.footer-contact {
    background: var(--bg-secondary);
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

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

.contact-info {
    flex: 1;
}

.contact-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-label {
    font-size: 14px;
    color: var(--text-muted);
    min-width: 80px;
}

.contact-value {
    font-size: 18px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.contact-qrcode {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.qrcode-img {
    width: 140px;
    height: 140px;
    border-radius: var(--card-radius);
    border: 2px solid var(--border-color);
}

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

.footer-bottom {
    background: var(--bg-primary);
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-accent);
}

.copyright {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
}

.copyright a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.copyright a:hover {
    color: var(--color-accent);
}

.ga-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.ga-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
}

/* ============================================
   13. 滚动动画
   ============================================ */
.scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   14. 响应式适配
   ============================================ */

/* 平板端 (768px - 1024px) */
@media (max-width: 1024px) {
    :root {
        --section-spacing: 80px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .code-preview {
        max-width: 400px;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .tools-visual {
        order: -1;
    }
  /* 案例 */
    .case-showcase {
        gap: 40px;
    }
    
    .case-showcase-left {
        padding: 30px;
        min-height: 300px;
    }
    
    .case-showcase-right {
        padding: 30px;
    }
    
    .case-showcase-title {
        font-size: 24px;
    }
    
    /* 关于 */
    .about-content {
        padding: 50px 40px;
        gap: 40px;
    }
    
    .about-logo {
        width: 140px;
        height: 140px;
    }
    
    /* 联系信息 */
    .contact-content {
        gap: 40px;
    }
}

/* 手机端 (< 768px) */
@media (max-width: 768px) {
    :root {
        --section-spacing: 60px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    /* 导航 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        gap: 20px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        transition: var(--transition-normal);
        opacity: 0;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-toggle {
        display: flex;
    }

    .logo-img {
        width: 120px;
        height: 40px;
    }

    .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);
    }
    
    /* Hero */
    .hero {
        padding: 100px 0 60px;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 2;
        margin-top: 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .tech-dashboard {
        max-width: 100%;
    }

    .dashboard-content {
        padding: 24px 20px;
    }

    .metric-row {
        gap: 20px;
    }

    .metric-value {
        font-size: 13px;
    }

    .hero-brand {
        display: none;
    }

    .scroll-indicator {
        display: none;
    }
    
    /* 关于 */
    .about-content {
        padding: 40px 24px;
        flex-direction: column;
        gap: 40px;
        align-items: center;
    }
    
    .about-left {
        padding: 0;
    }
    
    .about-logo {
        width: 120px;
        height: 120px;
    }
    
    .about-slogan {
        margin-top: 16px;
        font-size: 13px;
    }
    
    .about-title {
        text-align: center;
    }
    
    .about-text-content {
        text-align: center;
    }
    
    .about-text {
        font-size: 15px;
    }
    
    /* 服务 */
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    /* 工具 */
    .tool-body {
        height: 220px;
    }
    
    .tool-sidebar {
        width: 80px;
    }
    
    /* 案例 */
    .case-showcase {
        flex-direction: column;
        gap: 0;
    }
    
    .case-showcase-left {
        min-height: auto;
        padding: 30px;
    }
    
    .case-showcase-right {
        padding: 30px 24px;
    }
    
    .case-showcase-title {
        font-size: 22px;
    }
    
    .case-meta {
        gap: 24px;
    }
    
    .case-btn {
        align-self: stretch;
        width: 100%;
    }
    
    /* 联系信息 */
    .contact-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .contact-info {
        width: 100%;
    }
    
    .contact-title {
        text-align: center;
    }
    
    .contact-item {
        flex-direction: column;
        gap: 8px;
    }
    
    .contact-label {
        min-width: auto;
    }
    
    /* 底部 */
    .cta-title {
        font-size: 22px;
    }
    
    .footer-nav {
        gap: 20px;
    }
}

/* 横屏模式 (height < 600px) */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 80px 0 40px;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 2;
        margin-top: 30px;
    }

    .tech-dashboard {
        max-width: 400px;
        margin: 0 auto;
    }

    .hero-brand {
        display: none;
    }

    .scroll-indicator {
        display: none;
    }
}

/* 小屏手机 (< 480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

    .service-card {
        padding: 30px 20px;
    }
    
    .about-content {
        padding: 30px 20px;
    }
}