/* CSS Variables - 科幻蓝色主题 */
/* =========================================
   🎨 颜色配置区域 - 您可以在这里调整所有颜色
   ========================================= */
:root {
    /* 深色系 - 背景和主色调 */
    --primary-color: #0a0f1a;        /* 深空蓝 - 主背景，更深邃 */
    --primary-light: #0f1929;       /* 浅一点的深蓝 */
    --primary-dark: #05080f;        /* 更深的蓝色 */

    /* 蓝色系 - 强调色和科技感 */
    --accent-color: #00d4ff;        /* 霓虹蓝 - 强调色，更明亮 */
    --accent-secondary: #0088cc;   /* 次级强调蓝 */
    --tech-color: #0066aa;          /* 科技蓝 */
    --tech-light: #0099dd;          /* 浅科技蓝 */
    --tech-dark: #004477;           /* 深科技蓝 */

    /* 浅蓝色系 - 可以调整这些变量来改变"浅蓝色"效果 */
    --cyan-light: #00ffff;          /* 青色 - 极亮 */
    --cyan-medium: #00cccc;         /* 青色 - 中等 */
    --cyan-dark: #009999;           /* 青色 - 深色 */
    --sky-blue: #87ceeb;            /* 天蓝色 */
    --electric-blue: #5c9aff;       /* 电光蓝 */

    /* 中性色 */
    --white: #ffffff;
    --gray-light: #f0f2f5;
    --gray-medium: #6b7280;
    --gray-dark: #374151;

    /* 渐变色 - 基于上述颜色配置 */
    --gradient-primary: linear-gradient(135deg, var(--tech-color) 0%, var(--accent-color) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--tech-dark) 0%, var(--tech-light) 100%);
    --gradient-dark: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-light) 100%);
    --gradient-glow: linear-gradient(135deg, var(--accent-color) 0%, var(--tech-light) 100%);

    /* 阴影效果 */
    --shadow-light: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
    --shadow-glow-strong: 0 0 30px rgba(0, 212, 255, 0.6);

    /* 动画 */
    --transition: all 0.3s ease;
}

/* =========================================
   📝 注意：以上变量已统一配置
   - 想要更深的科幻感：加深 --primary-color 和 --primary-light
   - 想要更亮的霓虹效果：调整 --accent-color 和 --cyan-light
   - 想要改变整体色调：修改 --tech-color 系列
   ========================================= */

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(13, 27, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow-medium);
}

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

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-dark);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 102, 170, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 30%, rgba(0, 200, 255, 0.08) 0%, transparent 40%);
    animation: bgPulse 8s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--accent-color), 0 0 12px var(--accent-color);
    animation: float 8s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 0.4;
    }
    25% {
        transform: translateY(-30px) translateX(15px) scale(1.2);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-15px) translateX(-10px) scale(0.8);
        opacity: 0.5;
    }
    75% {
        transform: translateY(-40px) translateX(8px) scale(1.1);
        opacity: 0.9;
    }
}

/* 额外的装饰性粒子 */
.particle-fast {
    animation: floatFast 4s infinite;
}

@keyframes floatFast {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-50px) translateX(20px);
        opacity: 1;
    }
}

.particle-slow {
    animation: floatSlow 12s infinite;
}

@keyframes floatSlow {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-20px) translateX(-5px);
        opacity: 0.5;
    }
}

/* 连接线效果 */
.connection-line {
    position: absolute;
    pointer-events: none;
    opacity: 0;
    transform-origin: center;
}

@keyframes lineFade {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 0.6;
    }
}

/* Case Filter Section */
.case-filter {
    padding: 3rem 0;
    background: var(--gray-light);
}

.filter-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 2rem;
    background: var(--white);
    border: 2px solid var(--tech-color);
    color: var(--tech-color);
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.filter-btn:hover {
    background: var(--tech-color);
    color: var(--white);
}

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

/* Case Gallery */
.case-gallery {
    padding: 5rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.case-album {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    opacity: 1;
}

.case-album:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

.album-cover {
    position: relative;
    height: 280px;
    cursor: pointer;
    overflow: hidden;
}

.album-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.album-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.album-title {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
}

.album-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.case-album:hover .album-overlay {
    opacity: 1;
}

.album-count {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.btn-view-album {
    background: var(--accent-color);
    color: var(--primary-color);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.btn-view-album:hover {
    background: var(--white);
    transform: scale(1.05);
}

.album-info {
    padding: 1.5rem;
}

.album-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.album-desc {
    color: var(--gray-medium);
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.album-tags .tag {
    background: rgba(0, 102, 170, 0.1);
    color: var(--tech-color);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Image Modal */
.image-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-modal.visible {
    opacity: 1;
}

.modal-container {
    background: var(--white);
    border-radius: 16px;
    max-width: 1000px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-glow-strong);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--gray-medium);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-header {
    background: var(--gradient-primary);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 16px 16px 0 0;
}

.modal-header h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin: 0;
}

.modal-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--white);
}

.nav-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover:not(:disabled) {
    background: var(--white);
    color: var(--tech-color);
    transform: scale(1.1);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.modal-body {
    padding: 2rem;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
}

.image-preview {
    background: var(--gray-light);
    border-radius: 12px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-placeholder {
    text-align: center;
    color: var(--gray-medium);
}

.placeholder-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.placeholder-content p {
    margin: 0.5rem 0;
    font-size: 1.1rem;
}

.placeholder-text {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.image-description {
    padding: 1rem;
}

.image-description h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.image-description p {
    color: var(--gray-dark);
    line-height: 1.8;
}

.modal-footer {
    padding: 1.5rem 2rem;
    background: var(--gray-light);
    border-top: 1px solid var(--gray-medium);
}

.thumbnail-list {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding: 0.5rem 0;
}

.thumbnail-item {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--white);
    border: 2px solid var(--gray-medium);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    padding: 0.5rem;
}

.thumbnail-item:hover {
    border-color: var(--tech-color);
    transform: scale(1.05);
}

.thumbnail-item.active {
    border-color: var(--accent-color);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.thumbnail-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--tech-color);
}

.thumbnail-label {
    font-size: 0.75rem;
    color: var(--gray-dark);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    animation: textGlow 3s ease-in-out infinite;
}

@keyframes textGlow {
    0%, 100% {
        filter: brightness(1);
    }
    50% {
        filter: brightness(1.2);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-medium);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.trust-badges {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    font-size: 0.95rem;
}

.badge-icon {
    font-size: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

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

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

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

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--tech-color);
    border-color: var(--tech-color);
}

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

.btn-large {
    padding: 1rem 3rem;
    font-size: 1.125rem;
}

.btn-link {
    color: var(--tech-color);
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    display: inline-block;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Values Section */
.values {
    background: var(--gray-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition);
}

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

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.value-card p {
    color: var(--gray-medium);
}

/* Services Preview */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--gray-medium);
    margin-bottom: 1rem;
}

.price {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    margin: 1rem 0;
}

/* Tech Stack */
.tech-stack {
    background: var(--gradient-dark);
    color: var(--white);
}

.tech-stack .section-title {
    color: var(--white);
}

.tech-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.tech-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.1);
}

.tech-item:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-color);
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.tech-note {
    text-align: center;
    color: var(--gray-medium);
    font-size: 0.95rem;
    margin-top:20px;
}

/* Cases Preview */
.cases-preview {
    background: var(--gray-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.case-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

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

.case-image {
    background: var(--gradient-primary);
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 600;
}

.case-info {
    padding: 1.5rem;
}

.case-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.case-tags {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.case-desc {
    color: var(--gray-medium);
    line-height: 1.6;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.cta-content p {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-content .btn {
    background: var(--white);
    color: var(--tech-color);
}

.cta-content .btn:hover {
    background: var(--gray-light);
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 4rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-section p {
    color: var(--gray-medium);
    margin-bottom: 0.5rem;
}

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

.footer-section a {
    color: var(--gray-medium);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    margin-bottom: 0.5rem;
}

.footer-section a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-medium);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Page Header */
.page-header {
    background: var(--gradient-dark);
    padding: 8rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(0, 180, 216, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 119, 182, 0.1) 0%, transparent 50%);
}

.page-title {
    position: relative;
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1rem;
}

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

/* AI Intro Section */
.ai-intro {
    padding: 5rem 0;
    background: var(--gray-light);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.intro-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.intro-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.intro-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.intro-item h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.intro-item p {
    color: var(--gray-medium);
}

/* AI Services Section */
.ai-services {
    padding: 5rem 0;
}

.ai-service-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-medium);
    border: 2px solid transparent;
    transition: var(--transition);
}

.ai-service-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-glow);
}

.service-header {
    background: var(--gradient-primary);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.service-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    opacity: 0.9;
}

.service-header h3 {
    font-size: 1.75rem;
    color: var(--white);
    font-weight: 700;
}

.service-body {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    padding: 2rem;
}

.service-image {
    background: var(--gradient-dark);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
}

.service-placeholder {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
}

.service-content {
    padding: 0.5rem 0;
}

.service-description {
    font-size: 1.1rem;
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.service-content h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin: 1.5rem 0 0.75rem;
}

.feature-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--gray-dark);
    line-height: 1.6;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: rgba(0, 180, 216, 0.1);
    color: var(--tech-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.tag:hover {
    background: var(--accent-color);
    color: var(--white);
}

.price-info {
    background: var(--gray-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.price-label {
    font-weight: 600;
    color: var(--primary-color);
}

.price-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    margin: 0 0.5rem;
}

.price-note {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

/* Process Section */
.process-section {
    padding: 5rem 0;
    background: var(--gray-light);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.process-step {
    position: relative;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-glow);
}

.step-content h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.step-content p {
    color: var(--gray-medium);
    line-height: 1.6;
}

/* Tech Stack Section */
.tech-stack-section {
    padding: 5rem 0;
}

.tech-groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-group {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.tech-group:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.tech-group h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.tech-tag {
    background: rgba(0, 119, 182, 0.1);
    color: var(--tech-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.tech-tag:hover {
    background: var(--tech-color);
    color: var(--white);
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Active Menu Item */
.nav-menu a.active {
    color: var(--accent-color);
    position: relative;
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
}

/* Services Overview */
.services-overview {
    padding: 5rem 0;
    background: var(--gray-light);
}

.pricing-tiers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tier-card {
    background: var(--white);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

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

.tier-card.tier-pro {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.tier-card.tier-pro:hover {
    transform: scale(1.05) translateY(-10px);
}

.tier-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.tier-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tier-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tier-price {
    margin-bottom: 1.5rem;
}

.price-currency {
    font-size: 1.5rem;
    color: var(--accent-color);
    vertical-align: top;
}

.price-amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.price-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
}

.tier-desc {
    color: var(--gray-medium);
    margin-bottom: 1.5rem;
}

.tier-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.tier-features li {
    padding: 0.5rem 0;
    color: var(--gray-dark);
    border-bottom: 1px solid var(--gray-light);
}

.tier-features li:last-child {
    border-bottom: none;
}

/* Graduation Service */
.graduation-service {
    padding: 5rem 0;
}

.service-highlight {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.highlight-badge {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.highlight-content h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.highlight-desc {
    font-size: 1.1rem;
    color: var(--gray-dark);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.highlight-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.feature-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.feature-text h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.feature-text p {
    color: var(--gray-medium);
    font-size: 0.95rem;
    line-height: 1.5;
}

.highlight-pricing {
    background: var(--gray-light);
    padding: 1.5rem 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid var(--accent-color);
}

.pricing-label {
    font-weight: 600;
    color: var(--primary-color);
}

.pricing-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-color);
    margin: 0 0.5rem;
}

.pricing-note {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

.highlight-visual {
    position: relative;
}

.visual-placeholder {
    background: var(--gradient-dark);
    border-radius: 16px;
    padding: 3rem;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-content {
    position: relative;
}

.code-preview {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.code-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    display: flex;
    gap: 0.5rem;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-medium);
}

.code-body {
    padding: 1.5rem;
}

.code-line {
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    margin-bottom: 0.75rem;
}

.code-line.short {
    width: 60%;
}

.code-line.medium {
    width: 80%;
}

.visual-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--accent-color);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: var(--shadow-medium);
}

/* Development Process */
.development-process {
    padding: 5rem 0;
    background: var(--gray-light);
}

.process-flow {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 3rem;
}

.process-step {
    background: var(--white);
    padding: 2rem 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    flex: 1;
    min-width: 180px;
    max-width: 200px;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.step-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.process-step h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--gray-medium);
    font-size: 0.9rem;
    line-height: 1.5;
}

.process-arrow {
    font-size: 2rem;
    color: var(--accent-color);
    padding-top: 3rem;
    font-weight: 300;
}

/* Tech Showcase */
.tech-showcase {
    padding: 5rem 0;
}

.tech-intro {
    text-align: center;
    color: var(--gray-medium);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.tech-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.tech-category h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-item {
    background: rgba(0, 119, 182, 0.1);
    color: var(--tech-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.tech-item:hover {
    background: var(--tech-color);
    color: var(--white);
}

/* FAQ Section */
.faq-section {
    padding: 5rem 0;
    background: var(--gray-light);
}

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

.faq-item {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-light);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.faq-question h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin: 0;
    flex: 1;
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: 300;
    width: 30px;
    text-align: center;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 2rem 1.5rem;
    color: var(--gray-dark);
    line-height: 1.8;
    margin: 0;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(13, 27, 42, 0.9);
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.visible {
    opacity: 1;
}

.modal-content {
    background-color: var(--white);
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    position: relative;
    box-shadow: var(--shadow-glow);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    font-weight: 300;
    color: var(--gray-medium);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-header {
    background: var(--gradient-primary);
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    border-radius: 16px 16px 0 0;
    position: relative;
}

.modal-header h2 {
    color: var(--white);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.modal-header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    margin: 0;
}

.modal-body {
    padding: 2rem;
}

.qr-code-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-code-placeholder {
    width: 280px;
    height: 280px;
    background: var(--white);
    border: 3px solid var(--accent-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-medium);
}

.qr-code-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.qr-code-inner svg {
    width: 100%;
    height: auto;
    max-height: 200px;
}

.qr-code-tip {
    margin-top: 15px;
    color: var(--gray-medium);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
}

.modal-footer {
    background: var(--gray-light);
    padding: 1.5rem;
    text-align: center;
    border-radius: 0 0 16px 16px;
}

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

.contact-info p {
    color: var(--primary-color);
    font-size: 1rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .service-body {
        grid-template-columns: 1fr;
    }
    
    .service-image {
        min-height: 200px;
    }
    
    .service-number {
        font-size: 1.5rem;
    }
    
    .service-header h3 {
        font-size: 1.25rem;
    }
    
    .price-value {
        font-size: 1.25rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.5rem;
    }
    
    .service-header {
        flex-direction: column;
        text-align: center;
    }
    
    .service-header h3 {
        font-size: 1.1rem;
    }
    
    .feature-list li {
        font-size: 0.9rem;
    }
    
    .price-info {
        padding: 1rem;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-color);
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero-cta,
    .trust-badges {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .cta-content h2 {
        font-size: 1.5rem;
    }
    
    .service-body {
        grid-template-columns: 1fr;
    }
    
    .service-image {
        min-height: 200px;
    }
    
    .service-number {
        font-size: 1.5rem;
    }
    
    .service-header h3 {
        font-size: 1.25rem;
    }
    
    .price-value {
        font-size: 1.25rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    .pricing-tiers {
        grid-template-columns: 1fr;
    }
    
    .service-highlight {
        grid-template-columns: 1fr;
    }
    
    .process-flow {
        flex-direction: column;
    }
    
    .process-arrow {
        display: none;
    }
    
    .tech-categories {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .values-grid,
    .services-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .service-header {
        flex-direction: column;
        text-align: center;
    }
    
    .service-header h3 {
        font-size: 1.1rem;
    }
    
    .feature-list li {
        font-size: 0.9rem;
    }
    
    .price-info {
        padding: 1rem;
    }
    
    .highlight-features {
        grid-template-columns: 1fr;
    }
    
    .tier-price {
        font-size: 1.5rem;
    }
    
    .tech-items {
        justify-content: center;
    }
}