:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #3b82f6;
    --accent: #6366f1;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --dark: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
    --gradient-warm: linear-gradient(135deg, #818cf8, #4f46e5);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --radius-sm: 0.125rem;
    --radius: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--gray-50);
    overflow-x: hidden;
}

/* 现代网格布局系统 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    /* padding: 0 1.5rem; */
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-cols-6 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

/* 现代导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--gray-900);
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    transition: all 0.3s ease;
}

.logo:hover .logo-image {
    transform: scale(1.1);
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.logo:hover .logo-icon::before {
    opacity: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
    background: var(--gray-100);
}

/* 现代英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 50%, var(--gray-100) 100%);
    position: relative;
    overflow: hidden;
    padding-top: 5rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.05;
    transform: skewX(-15deg) translateX(50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-xl);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: var(--shadow);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.hero-visual {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 1.5rem;
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
}

/* 紧凑型统计 */
.stats-compact {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stats-row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stat-mini {
    background: white;
    padding: 1rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    text-align: center;
    min-width: 80px;
    transition: all 0.3s ease;
}

.stat-mini:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-mini .stat-number {
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.stat-mini .stat-label {
    font-size: 0.75rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* 主要展示区域 */
.hero-main-display {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.display-primary {
    position: relative;
}

.primary-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

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

.primary-overlay {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
}

.overlay-badge {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-600);
}

.overlay-badge i {
    color: #4285f4;
}

.overlay-stats {
    display: flex;
    gap: 0.5rem;
}

.mini-stat {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 60px;
}

.mini-number {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: #10b981;
}

.mini-label {
    display: block;
    font-size: 0.625rem;
    opacity: 0.8;
}

.display-secondary {
    margin-top: 0.5rem;
}

.secondary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.secondary-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.secondary-item:hover {
    transform: scale(1.05);
}

.secondary-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    pointer-events: none;
}

/* 动态信息流 */
.hero-info-stream {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    min-width: 200px;
}

.stream-header {
    background: var(--gradient-primary);
    color: white;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.stream-items {
    padding: 0.5rem;
}

.stream-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease;
}

.stream-item:hover {
    background: var(--gray-50);
}

.stream-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.stream-icon.success {
    background: var(--success-100);
    color: var(--success-600);
}

.stream-icon.warning {
    background: var(--warning-100);
    color: var(--warning-600);
}

.stream-icon.info {
    background: var(--primary-100);
    color: var(--primary-600);
}

.stream-content {
    flex: 1;
    min-width: 0;
}

.stream-title {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.125rem;
}

.stream-time {
    display: block;
    font-size: 0.625rem;
    color: var(--gray-500);
}

/* 图片放大功能 */
.image-zoomable {
    cursor: zoom-in;
    transition: all 0.3s ease;
}

.image-zoomable:hover {
    opacity: 0.9;
}

/* 模态框样式 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 99999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.image-modal.active {
    display: flex !important;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: zoomIn 0.3s ease;
}

.modal-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    color: var(--gray-700);
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: white;
    transform: scale(1.1);
}

.modal-info {
    position: absolute;
    bottom: -50px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem;
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--gray-700);
    font-size: 0.875rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 移动端模态框优化 */
@media (max-width: 768px) {
    .modal-content {
        max-width: 95%;
        max-height: 85%;
    }

    .modal-close {
        top: -35px;
        width: 28px;
        height: 28px;
        font-size: 16px;
    }

    .modal-info {
        bottom: -45px;
        padding: 0.75rem;
        font-size: 0.8125rem;
    }
}

.stat-item {
    text-align: center;
    padding: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* 现代卡片式内容区域 */
.section {
    padding: 5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* 特色服务 - 现代网格卡片 */
.features {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

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

.feature-icon {
    width: 3.5rem;
    height: 3.5rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* 案例展示 - 现代砖石布局 */
.cases {
    background: var(--gray-50);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.case-card {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.case-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.case-image:hover {
    transform: scale(1.05);
}

.case-content {
    padding: 1.5rem;
}

.case-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.case-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.case-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.case-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

/* 售后保障 - 现代网格布局 */
.guarantee {
    background: white;
}

.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.guarantee-card {
    background: var(--gray-50);
    padding: 2rem;
    border-radius: var(--radius-2xl);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.guarantee-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.guarantee-card:hover::before {
    opacity: 0.05;
}

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

.guarantee-icon {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.guarantee-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
    position: relative;
    z-index: 1;
}

.guarantee-card p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.875rem;
    position: relative;
    z-index: 1;
}

/* FAQ - 现代手风琴 */
.faq {
    background: var(--gray-50);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-item:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-50);
}

.faq-question:hover {
    background: var(--gray-100);
}

.faq-answer {
    display: none;
    padding: 1.5rem;
    background: white;
    border-top: 1px solid var(--gray-200);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.faq-item.active .faq-answer {
    display: block;
    animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.faq-item {
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 1.5rem;
    background: var(--gray-50);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s ease;
}

.faq-question:hover {
    background: var(--gray-100);
}

.faq-question span:first-child {
    font-weight: 600;
    color: var(--gray-800);
}

.faq-answer p {
    color: var(--gray-600);
    line-height: 1.6;
}

.faq-toggle {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 700;
    display: inline-block;
    transition: transform 0.3s ease, color 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--secondary);
}



/* 联系我们 - 现代渐变背景 */
.contact {
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
}

.contact .section-title {
    color: white;
}

.contact .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

.contact-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--radius-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.contact-item i {
    font-size: 2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.contact-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.contact-item p {
    opacity: 0.8;
    font-size: 0.875rem;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

.modal-content {
    margin: auto;
    display: block;
    width: 90%;
    max-width: 800px;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--radius-xl);
    animation: modalZoom 0.3s ease;
}

@keyframes modalZoom {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.close {
    position: absolute;
    top: 1rem;
    right: 2rem;
    color: white;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 101;
}

.close:hover {
    color: var(--error);
    transform: scale(1.1);
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-animate.active {
    opacity: 1;
    transform: translateY(0);
}

/* 板块间交互动画 */
.section {
    transition: all 0.4s ease;
    position: relative;
}

.section:hover {
    transform: translateY(-5px);
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.section:hover::before {
    opacity: 1;
}

/* 卡片悬停动画 */
.feature-card,
.case-card,
.guarantee-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before,
.case-card::before,
.guarantee-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.feature-card:hover::before,
.case-card:hover::before,
.guarantee-card:hover::before {
    left: 100%;
}

.feature-card:hover,
.case-card:hover,
.guarantee-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* 按钮动画增强 */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

/* 图标旋转动画 */
.feature-icon,
.guarantee-icon {
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon,
.guarantee-card:hover .guarantee-icon {
    transform: rotate(360deg) scale(1.1);
}

/* 渐进式加载动画 */
.features-grid .feature-card {
    animation-delay: calc(var(--index) * 0.1s);
}

.cases-grid .case-card {
    animation-delay: calc(var(--index) * 0.15s);
}

.guarantee-grid .guarantee-card {
    animation-delay: calc(var(--index) * 0.1s);
}

/* 脉冲动画 */
@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.hero-stat:hover {
    animation: pulse 1s infinite;
}

/* 浮动动画 */
@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }
}

.contact-item {
    animation: float 3s ease-in-out infinite;
}

.contact-item:nth-child(2) {
    animation-delay: 1s;
}

.contact-item:nth-child(3) {
    animation-delay: 2s;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .stats-grid {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .container {
        padding: 0 1rem;
    }

    .hero {
        padding-top: 4rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .features-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .guarantee-grid {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stats-compact {
        order: 3;
    }

    .hero-main-display {
        order: 1;
    }

    .hero-info-stream {
        order: 2;
        min-width: auto;
    }

    .stats-row {
        flex-direction: row;
        justify-content: space-between;
    }

    .stat-mini {
        min-width: 70px;
        padding: 0.75rem;
    }

    .stat-mini .stat-number {
        font-size: 1.25rem;
    }

    .primary-image {
        height: 160px;
    }

    .primary-overlay {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }

    .overlay-stats {
        align-self: flex-end;
    }

    .mini-stat {
        min-width: 50px;
        padding: 0.375rem;
    }

    .mini-number {
        font-size: 0.75rem;
    }

    .mini-label {
        font-size: 0.5rem;
    }

    .secondary-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.375rem;
    }

    .stream-header {
        padding: 0.75rem;
        font-size: 0.8125rem;
    }

    .stream-items {
        padding: 0.375rem;
    }

    .stream-item {
        padding: 0.5rem;
        gap: 0.5rem;
    }

    .stream-icon {
        width: 20px;
        height: 20px;
        font-size: 0.625rem;
    }

    .stream-title {
        font-size: 0.6875rem;
    }

    .stream-time {
        font-size: 0.5625rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {

    .feature-card,
    .case-content,
    .guarantee-card {
        padding: 1.5rem;
    }

    .faq-question,
    .faq-answer {
        padding: 1rem;
    }

    .faq-answer.active {
        padding: 1rem;
    }

    .contact-item {
        padding: 1.5rem;
    }
}