/* ============================================
   中维科技企业官网 - 主样式表
   风格：深色科技风 · GEO 核心
   主色调：紫蓝渐变
   ============================================ */

/* CSS变量 - 主题色系 */
:root {
    /* 主色调 - 紫蓝渐变系 */
    --primary-purple: #8B5CF6;
    --primary-blue: #3B82F6;
    --primary-cyan: #06B6D4;
    --primary-pink: #EC4899;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 50%, #06B6D4 100%);
    --gradient-hover: linear-gradient(135deg, #A78BFA 0%, #60A5FA 50%, #22D3EE 100%);
    --gradient-dark: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
    --gradient-card: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(59, 130, 246, 0.05));
    
    /* 背景色 */
    --bg-dark: #0F172A;
    --bg-darker: #020617;
    --bg-card: rgba(30, 41, 59, 0.5);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-footer: #020617;
    
    /* 文字色 */
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --text-white: #FFFFFF;
    
    /* 边框色 */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(139, 92, 246, 0.5);
    --border-blue: rgba(59, 130, 246, 0.3);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);
    --shadow-blue: 0 0 30px rgba(59, 130, 246, 0.2);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ============================================
   容器
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(2, 6, 23, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-img {
    height: 40px;
    width: 40px;
    border-radius: var(--radius-md);
    object-fit: contain;
    animation: clockMinuteRotate 60s linear infinite;
    transform-origin: center center;
}

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

.nav-logo:hover .logo-img {
    animation-play-state: paused;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-normal);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.nav-cta {
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
    display: block;
}

.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);
}

/* ============================================
   英雄区域
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
    background: var(--bg-darker);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

#particleCanvas {
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.hero-text {
    flex: 1.2;
    max-width: 700px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(139, 92, 246, 0.15);
    color: #A78BFA;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.hero-ai-demo {
    flex: 0.8;
    max-width: 420px;
}

/* AI 问答演示卡片 */
.ai-demo-card {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.ai-demo-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.ai-demo-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
}

.ai-demo-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ai-demo-status {
    font-size: 0.75rem;
    color: #22C55E;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.ai-demo-status::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #22C55E;
    border-radius: 50%;
    display: inline-block;
}

.ai-demo-question {
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    max-width: 80%;
}

.ai-demo-question p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ai-demo-answer {
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    margin-left: auto;
    max-width: 90%;
}

.ai-demo-answer p {
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.ai-demo-answer .highlight-text {
    color: #A78BFA;
    font-weight: 600;
}

.ai-demo-platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: var(--spacing-sm);
}

.ai-demo-platform-tag {
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.ai-demo-platform-tag.active {
    background: rgba(139, 92, 246, 0.2);
    color: #A78BFA;
    border-color: rgba(139, 92, 246, 0.4);
}

/* ============================================
   按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    outline: none;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-purple);
    background: rgba(139, 92, 246, 0.1);
}

.btn-large {
    padding: 1.125rem 2.25rem;
    font-size: 1.125rem;
}

.btn-arrow::after {
    content: '→';
    transition: transform var(--transition-normal);
}

.btn-arrow:hover::after {
    transform: translateX(4px);
}

/* ============================================
   区块标题
   ============================================ */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    color: #A78BFA;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(139, 92, 246, 0.1);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    letter-spacing: -0.02em;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   玻璃卡片
   ============================================ */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

/* ============================================
   数据统计
   ============================================ */
.stats {
    background: var(--bg-dark);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-lg);
}

.stat-value {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-value-suffix {
    font-size: 1.5rem;
    opacity: 0.7;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   平台覆盖
   ============================================ */
.platforms {
    background: var(--bg-dark);
    padding: var(--spacing-2xl) 0;
}

.platforms-list {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.7;
    transition: all var(--transition-normal);
}

.platform-item:hover {
    opacity: 1;
    transform: translateY(-2px);
}

.platform-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.platform-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   痛点区域
   ============================================ */
.problems {
    background: var(--bg-darker);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.problem-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    backdrop-filter: blur(10px);
}

.problem-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.problem-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.problem-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(139, 92, 246, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.problem-tag {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.problem-question {
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 3px solid var(--primary-purple);
}

.problem-context {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   服务卡片（GEO 6 项）
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.service-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(139, 92, 246, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.service-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.service-link {
    color: #A78BFA;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap var(--transition-normal);
}

.service-link:hover {
    gap: 0.5rem;
}

/* ============================================
   案例展示
   ============================================ */
.cases-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-color: transparent;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.case-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.case-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.case-tag.geo-tag {
    background: rgba(139, 92, 246, 0.2);
    color: #A78BFA;
}

.case-tag.agent-tag {
    background: rgba(251, 191, 36, 0.15);
    color: #FBBF24;
}

.case-tag.codex-tag {
    background: rgba(52, 211, 153, 0.15);
    color: #34D399;
}

.case-platform {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.case-quote {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-purple);
}

.case-quote p {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.7;
    font-style: italic;
}

.case-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

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

.result-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.result-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.case-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.95rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.author-title {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   业务流程
   ============================================ */
.process {
    background: var(--bg-dark);
}

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

.process-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    transition: all var(--transition-normal);
}

.process-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.process-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
}

.process-icon {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.process-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.process-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   核心优势
   ============================================ */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.advantage-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.advantage-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.advantage-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.advantage-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   其他业务（首页底部）
   ============================================ */
.other-business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.other-business-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.other-business-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

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

.other-business-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.other-business-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.other-business-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

/* ============================================
   时间线（关于页）
   ============================================ */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-year {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 20px;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--gradient-primary);
    border: 3px solid var(--bg-darker);
    border-radius: var(--radius-full);
    box-shadow: 0 0 0 2px var(--primary-purple);
    z-index: 1;
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.timeline-content:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.timeline-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   证书展示
   ============================================ */
.certificates {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.certificates-5col {
    grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1200px) {
    .certificates-5col {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .certificates-5col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .certificates-5col {
        grid-template-columns: 1fr;
    }
}

.cert-frame {
    border: none;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    position: relative;
}

.cert-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: none;
    pointer-events: none;
}

.cert-frame:hover {
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.3);
}

.cert-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.cert-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.cert-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cert-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.cert-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   业务详情（services 页）
   ============================================ */
.service-detail-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.service-detail-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.service-detail-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.service-detail-tagline {
    color: var(--text-secondary);
    font-size: 1rem;
}

.service-detail-body {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-2xl);
}

.service-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.feature-item:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-sm);
}

.feature-check {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.feature-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   套餐卡片
   ============================================ */
.pricing-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
}

.pricing-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured {
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: var(--shadow-glow);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: var(--spacing-md);
}

.pricing-amount {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-unit {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features li::before {
    content: '✓';
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.pricing-cta {
    display: block;
    text-align: center;
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.pricing-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   招聘
   ============================================ */
.jobs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.job-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.job-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.job-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.job-dept {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.job-tag-hot {
    background: rgba(239, 68, 68, 0.2);
    color: #F87171;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.job-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.job-meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.job-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.job-apply {
    background: rgba(139, 92, 246, 0.15);
    color: #A78BFA;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.job-apply:hover {
    background: var(--gradient-primary);
    color: var(--text-white);
}

/* ============================================
   福利
   ============================================ */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.benefit-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.benefit-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.benefit-icon {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.benefit-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   联系
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--border-glow);
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: rgba(139, 92, 246, 0.15);
    color: #A78BFA;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.contact-detail-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.contact-detail-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

/* ============================================
   表单
   ============================================ */
.contact-form {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-label .required {
    color: #F87171;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-submit {
    width: 100%;
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: 0.875rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

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

/* ============================================
   快速咨询
   ============================================ */
.quick-contact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.quick-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
}

.quick-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.quick-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-sm);
    background: rgba(139, 92, 246, 0.15);
    color: #A78BFA;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.quick-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.quick-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ============================================
   招聘流程
   ============================================ */
.apply-process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.apply-step {
    text-align: center;
    position: relative;
    padding: var(--spacing-md);
}

.apply-step-num {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.apply-step-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.apply-step-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   页面英雄区（非首页）
   ============================================ */
.page-hero {
    padding: 160px 0 80px;
    background: var(--bg-darker);
    text-align: center;
    position: relative;
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.page-hero-tag {
    display: inline-block;
    color: #A78BFA;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(139, 92, 246, 0.1);
}

.page-hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

.page-hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   CTA 区块
   ============================================ */
.cta {
    background: linear-gradient(135deg, #0F172A, #1E1B4B);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.cta-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-white {
    background: var(--text-white);
    color: var(--primary-purple);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
}

.btn-outline-white {
    background: transparent;
    color: var(--text-white);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-white);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--bg-footer);
    color: var(--text-light);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.footer-logo-text {
    font-weight: 700;
    font-size: 1.1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-muted);
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul a {
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: color var(--transition-normal);
}

.footer-col ul a:hover {
    color: #A78BFA;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-contact-item {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    .hero-text {
        max-width: 100%;
    }
    .hero-title {
        font-size: 2.75rem;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-ai-demo {
        max-width: 100%;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .services-grid,
    .cases-grid,
    .jobs-grid,
    .problem-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .advantages-grid,
    .certificates,
    .benefits-grid,
    .process-grid,
    .apply-process,
    .quick-contact {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-grid,
    .service-detail-body {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .other-business-grid {
        grid-template-columns: 1fr;
    }
    .timeline::before {
        left: 16px;
    }
    .timeline-item,
    .timeline-item:nth-child(even) {
        grid-template-columns: 1fr;
        text-align: left !important;
    }
    .timeline-item:nth-child(even) .timeline-year,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
        text-align: left;
        justify-content: flex-start;
    }
    .timeline-year {
        margin-bottom: var(--spacing-sm);
    }
    .timeline-dot {
        left: 16px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(2, 6, 23, 0.98);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
    }
    .nav-menu.open {
        display: flex;
    }
    .nav-cta {
        margin-top: var(--spacing-sm);
        text-align: center;
    }
    .nav-toggle {
        display: flex;
    }
    .hero-title,
    .page-hero-title {
        font-size: 2.25rem;
    }
    .section-title {
        font-size: 1.875rem;
    }
    .stats-grid,
    .services-grid,
    .cases-grid,
    .jobs-grid,
    .problem-grid,
    .advantages-grid,
    .certificates,
    .benefits-grid,
    .process-grid,
    .apply-process,
    .quick-contact {
        grid-template-columns: 1fr;
    }
    .stat-value {
        font-size: 2.25rem;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .service-features {
        grid-template-columns: 1fr;
    }
}


/* ============================================
   知识产权证书卡片（含图片）
   ============================================ */
.cert-card-with-image {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    gap: 1rem;
}

.cert-image-wrapper {
    width: 220px;
    height: 300px;
    border-radius: 8px;
    overflow: hidden;
    border: 4px solid #d4af37;
    background: #fff;
    box-shadow: 
        0 0 0 2px #1a1a2e,
        0 4px 15px rgba(0,0,0,0.3),
        inset 0 0 20px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    position: relative;
}

.cert-image-wrapper::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 1px solid rgba(212,175,55,0.3);
    border-radius: 4px;
    pointer-events: none;
}

.cert-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.cert-image:hover {
    transform: scale(1.02);
}

.cert-info {
    width: 100%;
}

.cert-reg {
    font-size: 0.85rem;
    color: var(--primary-purple);
    font-family: monospace;
    margin: 0.25rem 0 0.5rem;
    letter-spacing: 0.5px;
}

.cert-card-with-image .cert-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.cert-card-with-image .cert-icon {
    font-size: 2rem;
}

/* 证书3列布局 - 用于6个证书 */
.certificates-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
@media (max-width: 992px) {
    .certificates-3col {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 576px) {
    .certificates-3col {
        grid-template-columns: 1fr;
    }
}

/* 企业信用三颗星星 */
.cert-stars {
    font-size: 1.8rem;
    letter-spacing: 8px;
    margin: 10px 0 5px;
}

/* ============================================
   客户评价模块
   ============================================ */
.testimonials {
    background: var(--bg-section);
    position: relative;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.testimonial-card {
    padding: 25px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(139, 92, 246, 0.15);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    flex-shrink: 0;
}

.testimonial-info {
    flex: 1;
}

.testimonial-name {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 3px;
}

.testimonial-company {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.testimonial-stars {
    font-size: 1rem;
    letter-spacing: 2px;
}

.testimonial-body {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.testimonial-section {
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    padding: 15px;
    border-left: 3px solid var(--primary-purple);
}

.testimonial-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    padding: 3px 10px;
    border-radius: 20px;
}

.testimonial-tag.experience {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.testimonial-tag.professional {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
}

.testimonial-tag.authority {
    background: rgba(236, 72, 153, 0.2);
    color: #f472b6;
}

.testimonial-tag.trust {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.testimonial-text {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}