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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #f59e0b;
    --text-dark: #1e293b;
    --text-medium: #475569;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
}

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

.nav-link {
    display: block;
    padding: 8px 16px;
    color: var(--text-medium);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.nav-link.btn-primary {
    background: var(--primary-color);
    color: white;
}

.nav-link.btn-primary:hover {
    background: var(--primary-dark);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #dbeafe 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: var(--primary-color);
    position: relative;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-medium);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Dashboard Showcase */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.dashboard-showcase {
    width: 100%;
    max-width: 480px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: linear-gradient(135deg, #1e3a5f, #2563eb);
    color: white;
}

.dashboard-tabs {
    display: flex;
    gap: 4px;
}

.dashboard-tabs .tab {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0.7;
    transition: all 0.3s;
}

.dashboard-tabs .tab.active {
    background: rgba(255,255,255,0.2);
    opacity: 1;
}

.dashboard-time {
    font-size: 0.85rem;
    font-family: monospace;
    opacity: 0.9;
}

.dashboard-body {
    padding: 20px;
}

.kpi-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.kpi-box {
    background: #f8fafc;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}

.kpi-label {
    font-size: 0.7rem;
    color: #64748b;
    margin-bottom: 4px;
}

.kpi-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 2px;
}

.kpi-trend {
    font-size: 0.65rem;
    font-weight: 600;
}

.kpi-trend.up {
    color: #10b981;
}

.kpi-trend.down {
    color: #ef4444;
}

.chart-area {
    background: #f8fafc;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.chart-title {
    font-size: 0.8rem;
    color: #64748b;
    margin-bottom: 12px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    height: 80px;
    gap: 8px;
}

.chart-bars .bar {
    flex: 1;
    background: linear-gradient(to top, #3b82f6, #60a5fa);
    border-radius: 3px 3px 0 0;
    min-height: 20%;
    transition: all 0.3s;
}

.chart-bars .bar.active {
    background: linear-gradient(to top, #2563eb, #3b82f6);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}

.status-row {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: #64748b;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-item.running .status-dot {
    background: #10b981;
    animation: pulse 2s infinite;
}

.status-item.warning .status-dot {
    background: #f59e0b;
}

.status-item.error .status-dot {
    background: #ef4444;
}

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

.mockup-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

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

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.mockup-content {
    display: flex;
    height: 320px;
}

.mockup-sidebar {
    width: 160px;
    background: var(--bg-light);
    padding: 16px;
    border-right: 1px solid var(--border-color);
}

.sidebar-item {
    padding: 10px 12px;
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-medium);
    cursor: pointer;
    transition: var(--transition);
}

.sidebar-item:hover,
.sidebar-item.active {
    background: var(--primary-color);
    color: white;
}

.mockup-main {
    flex: 1;
    padding: 24px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.chart-placeholder {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    height: 200px;
}

.chart-bar {
    width: 40px;
    background: linear-gradient(to top, var(--primary-color), var(--primary-light));
    border-radius: 4px 4px 0 0;
}

/* 通用Section */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-medium);
}

/* 产品服务 */
.products {
    background: var(--bg-white);
}

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

.product-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.product-card.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.product-card.featured h3,
.product-card.featured p,
.product-card.featured .feature-list li {
    color: white;
}

.product-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-svg {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.product-card p {
    color: var(--text-medium);
    margin-bottom: 24px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    margin-bottom: 24px;
}

.feature-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-medium);
}

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

.product-card.featured .feature-list li::before {
    color: rgba(255, 255, 255, 0.8);
}

.link-arrow {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

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

.product-card.featured .link-arrow {
    color: white;
}

/* 解决方案 */
.solutions {
    background: var(--bg-light);
}

.solutions-tabs {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 20px;
    background: transparent;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-medium);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.tab-btn:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
}

.tab-content {
    padding: 48px;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.solution-text h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.solution-text > p {
    color: var(--text-medium);
    margin-bottom: 24px;
    line-height: 1.7;
}

.solution-features {
    list-style: none;
}

.solution-features li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-medium);
    border-bottom: 1px solid var(--border-color);
}

.solution-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.solution-visual {
    height: 300px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--bg-light), #e0f2fe);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.solution-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

/* 机械加工行业图片 - CNC加工中心 */
.solution-visual.machining {
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    position: relative;
    overflow: hidden;
}

.solution-visual.machining::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 180px;
    background: linear-gradient(180deg, #2d3748 0%, #1a202c 100%);
    border-radius: 10px 10px 0 0;
    box-shadow: 
        inset 0 10px 20px rgba(0,0,0,0.5),
        0 0 40px rgba(37, 99, 235, 0.3);
}

.solution-visual.machining::after {
    content: '';
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 80px;
    background: linear-gradient(135deg, #4a5568, #2d3748);
    border-radius: 4px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

/* 机床主轴动画 */
.solution-visual.machining .spindle {
    position: absolute;
    bottom: 140px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 60px;
    background: linear-gradient(180deg, #718096, #4a5568);
    border-radius: 2px;
    animation: spindleMove 3s ease-in-out infinite;
}

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

/* 电子制造行业图片 - 电子组装车间 */
.solution-visual.electronics {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    position: relative;
    overflow: hidden;
}

.solution-visual.electronics::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 260px;
    height: 8px;
    background: linear-gradient(90deg, transparent, #f59e0b, transparent);
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
}

.solution-visual.electronics::after {
    content: '';
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 240px;
    height: 160px;
    background: repeating-linear-gradient(
        0deg,
        #1e293b,
        #1e293b 20px,
        #334155 20px,
        #334155 40px
    );
    border-radius: 4px;
    box-shadow: inset 0 0 30px rgba(0,0,0,0.5);
}

/* 工作台效果 */
.solution-visual.electronics .workbench {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 60px;
    background: linear-gradient(180deg, #475569, #334155);
    border-radius: 4px;
}

/* 装配制造行业图片 - SMT贴片车间 */
.solution-visual.assembly {
    background: linear-gradient(180deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
    position: relative;
    overflow: hidden;
}

.solution-visual.assembly::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    height: 60px;
    background: linear-gradient(180deg, #6366f1, #4f46e5);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.4);
}

.solution-visual.assembly::after {
    content: '';
    position: absolute;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    width: 240px;
    height: 4px;
    background: #818cf8;
    border-radius: 2px;
    box-shadow: 0 0 15px rgba(129, 140, 248, 0.8);
    animation: smtLight 2s ease-in-out infinite;
}

@keyframes smtLight {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; box-shadow: 0 0 25px rgba(129, 140, 248, 1); }
}

/* PCB板效果 */
.solution-visual.assembly .pcb {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 120px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.solution-visual.assembly .pcb::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: repeating-linear-gradient(
        90deg,
        #34d399,
        #34d399 2px,
        #10b981 2px,
        #10b981 8px
    );
    border-radius: 2px;
}

/* 注塑行业图片 - 注塑车间 */
.solution-visual.injection {
    background: linear-gradient(180deg, #064e3b 0%, #065f46 50%, #047857 100%);
    position: relative;
    overflow: hidden;
}

.solution-visual.injection::before {
    content: '';
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 180px;
    height: 200px;
    background: linear-gradient(180deg, #374151 0%, #1f2937 50%, #111827 100%);
    border-radius: 10px 10px 0 0;
    box-shadow: 
        inset 0 5px 15px rgba(0,0,0,0.5),
        0 0 40px rgba(16, 185, 129, 0.2);
}

.solution-visual.injection::after {
    content: '';
    position: absolute;
    bottom: 180px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 60px;
    background: linear-gradient(180deg, #6b7280, #4b5563);
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.4);
}

/* 注塑机动画 */
.solution-visual.injection .mold {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 60px;
    background: linear-gradient(135deg, #9ca3af, #6b7280);
    border-radius: 4px;
    animation: moldCycle 4s ease-in-out infinite;
}

@keyframes moldCycle {
    0%, 100% { transform: translateX(-50%) scaleY(1); }
    50% { transform: translateX(-50%) scaleY(0.9); }
}

/* 蒸汽效果 */
.solution-visual.injection .steam {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 80px;
    background: radial-gradient(ellipse, rgba(255,255,255,0.2), transparent);
    border-radius: 50%;
    animation: steamRise 3s ease-out infinite;
}

@keyframes steamRise {
    0% { transform: translateX(-50%) translateY(0) scale(1); opacity: 0.6; }
    100% { transform: translateX(-50%) translateY(-30px) scale(1.5); opacity: 0; }
}

/* 客户案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.case-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

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

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.case-industry {
    padding: 6px 12px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 4px;
}

.case-result {
    font-size: 1.5rem;
    font-weight: 700;
    color: #10b981;
}

.case-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.case-card > p {
    color: var(--text-medium);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 24px;
}

.case-metrics {
    display: flex;
    gap: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* 运营方案 */
.operation {
    background: linear-gradient(180deg, var(--bg-light) 0%, white 100%);
}

.operation-overview {
    margin-bottom: 60px;
}

.operation-goals h3 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 32px;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.goal-item {
    background: white;
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.goal-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.goal-item h4 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.goal-item p {
    color: var(--text-medium);
}

.subsection-title {
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: 40px;
}

.platforms-section {
    margin-bottom: 80px;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.platform-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.platform-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.platform-card.douyin .platform-header {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: white;
}

.platform-card.xhs .platform-header {
    background: linear-gradient(135deg, #ff2442, #ff6b7a);
    color: white;
}

.platform-icon {
    font-size: 2rem;
}

.platform-header h4 {
    font-size: 1.5rem;
}

.platform-content {
    padding: 24px;
}

.platform-desc {
    color: var(--text-medium);
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.content-types h5 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.content-types ul {
    list-style: none;
}

.content-types li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-medium);
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    min-width: 40px;
    text-align: center;
}

.platform-kpi {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 时间线 */
.timeline-section {
    margin-bottom: 80px;
}

.timeline {
    display: flex;
    gap: 32px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 24px;
    right: 24px;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.timeline-item {
    flex: 1;
    position: relative;
    z-index: 1;
}

.timeline-marker {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    box-shadow: 0 0 0 8px white;
}

.timeline-content {
    background: white;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.timeline-content h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.timeline-content > p {
    color: var(--text-medium);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.timeline-content ul {
    list-style: none;
    font-size: 0.85rem;
}

.timeline-content li {
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
    color: var(--text-light);
}

.timeline-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* KPI区域 */
.kpi-section {
    margin-bottom: 80px;
}

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

.kpi-card {
    background: white;
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.kpi-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

/* 预算表格 */
.budget-section {
    max-width: 800px;
    margin: 0 auto;
}

.budget-table {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.budget-row {
    display: grid;
    grid-template-columns: 1fr 120px 1fr;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

.budget-row.header {
    background: var(--bg-light);
    font-weight: 600;
}

.budget-row.total {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.budget-amount {
    font-weight: 600;
    color: var(--primary-color);
}

.budget-row.total .budget-amount {
    color: white;
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.about-text > p {
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.advantage-item {
    display: flex;
    gap: 16px;
}

.advantage-icon {
    font-size: 2rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-svg {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.advantage-item h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.about-visual {
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.building-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-visual:hover .building-img {
    transform: scale(1.05);
}

.building-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}

.location-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255,255,255,0.95);
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

/* 联系我们 */
.contact {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 100px 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 16px;
}

.contact-info > p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
}

.method-icon {
    font-size: 2rem;
}

.method-label {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.method-value {
    display: block;
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

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

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: white;
}

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

.footer-column li {
    margin-bottom: 8px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid,
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-content,
    .about-content,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        flex-direction: column;
    }
    
    .timeline::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .products-grid,
    .cases-grid,
    .platforms-grid,
    .goals-grid,
    .kpi-grid,
    .advantages {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1 1 50%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}