/* Website 191 - 动态流体空间布局 (Dynamic Fluid Space Layout) */
/* Theme: Deep Blue to Cyan Gradient */

:root {
    --primary-color: #0f172a;
    --secondary-color: #0891b2;
    --accent-color: #22d3ee;
    --text-color: #1e293b;
    --text-light: #64748b;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --gradient-start: #0f172a;
    --gradient-mid: #1e3a5f;
    --gradient-end: #0891b2;
    --shadow: 0 4px 20px rgba(15, 23, 42, 0.1);
    --shadow-hover: 0 8px 40px rgba(8, 145, 178, 0.2);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Fluid Background Animation */
.fluid-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-mid) 50%, var(--gradient-end) 100%);
    overflow: hidden;
}

.fluid-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: fluidMove 15s ease-in-out infinite;
}

.fluid-shape:nth-child(1) {
    width: 500px;
    height: 500px;
    background: #22d3ee;
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.fluid-shape:nth-child(2) {
    width: 400px;
    height: 400px;
    background: #0ea5e9;
    top: 50%;
    right: -100px;
    animation-delay: -5s;
}

.fluid-shape:nth-child(3) {
    width: 350px;
    height: 350px;
    background: #06b6d4;
    bottom: -50px;
    left: 30%;
    animation-delay: -10s;
}

@keyframes fluidMove {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, 30px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 50px) scale(0.9);
    }
    75% {
        transform: translate(40px, -20px) scale(1.05);
    }
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gradient-start);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gradient-start);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 60px;
    position: relative;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 25px;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero h1 span {
    background: linear-gradient(135deg, #22d3ee, #67e8f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.btn {
    padding: 16px 36px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 20px rgba(8, 145, 178, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(8, 145, 178, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Styles */
.section {
    padding: 100px 20px;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gradient-start);
    margin-bottom: 20px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* Fluid Cards Grid */
.fluid-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.fluid-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 24px;
    padding: 40px 35px;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    box-shadow: var(--shadow);
}

.fluid-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.fluid-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

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

.fluid-card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 25px;
    color: white;
}

.fluid-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 15px;
}

.fluid-card-description {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
}

/* Features List */
.features-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 25px;
    padding: 30px;
    background: white;
    border-radius: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.feature-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 10px;
}

.feature-content p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Stats Section */
.stats-section {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    padding: 80px 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #22d3ee, #67e8f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.85;
}

/* Contact Section */
.contact-section {
    background: var(--background);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.contact-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.contact-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 25px;
    color: white;
}

.contact-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 15px;
}

.contact-card p {
    color: var(--text-light);
    font-size: 1.1rem;
    word-break: break-all;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    color: white;
    padding: 60px 20px 30px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 40px auto 0;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .feature-item {
        flex-direction: column;
        text-align: center;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* Page Content */
.page-hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 60px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
}

.page-hero p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 700px;
    margin: 0 auto;
}

.content-section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.content-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 30px;
}

.content-section p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Timeline Style */
.timeline {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 25px;
    top: 60px;
    bottom: -40px;
    width: 3px;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-icon {
    width: 54px;
    height: 54px;
    min-width: 54px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    flex: 1;
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 12px;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Service Grid */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.service-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 25px;
    color: white;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 10px;
}

.product-info p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gradient-start);
    margin-bottom: 25px;
}

.about-text p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 24px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: white;
}

@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    padding: 80px 20px;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Breadcrumb */
.breadcrumb {
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 20px;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    z-index: 999;
}

.breadcrumb-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.breadcrumb span {
    color: var(--text-light);
}