/* ========================================
   深圳市云绘科技有限公司 - 企业网站样式
   优化版：专业科技风格 + 精致色彩系统
   ======================================== */

/* CSS Variables - 优化色彩系统 */
:root {
    /* 主色调 - 深空蓝科技感 */
    --bg-primary: #0B1426;
    --bg-secondary: #0F1D35;
    --bg-card: rgba(15, 29, 53, 0.8);
    
    /* 强调色 - 激光蓝+翡翠绿 */
    --accent-blue: #00B4D8;
    --accent-blue-light: #48CAE4;
    --accent-blue-dark: #0096B7;
    --accent-green: #00E5A0;
    --accent-green-light: #34D399;
    --accent-cyan: #22D3EE;
    
    /* 文字层级 */
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --text-accent: #00B4D8;
    
    /* 边框与玻璃效果 */
    --border-color: rgba(0, 180, 216, 0.12);
    --border-hover: rgba(0, 180, 216, 0.35);
    --glass-bg: rgba(15, 29, 53, 0.65);
    --glass-border: rgba(0, 180, 216, 0.1);
    --glass-blur: blur(24px);
    
    /* 光影效果 */
    --glow-blue: 0 0 20px rgba(0, 180, 216, 0.2);
    --glow-blue-strong: 0 0 40px rgba(0, 180, 216, 0.35);
    --glow-green: 0 0 20px rgba(0, 229, 160, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.4);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    --gradient-blue: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    --gradient-text: linear-gradient(135deg, #ffffff 0%, var(--accent-blue-light) 50%, var(--accent-green) 100%);
    
    /* 动画 */
    --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 10001;
    transition: width 0.1s linear;
    box-shadow: 0 0 10px rgba(0, 180, 216, 0.5);
}

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 180, 216, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 180, 216, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* Particle Canvas */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10000;
    transition: var(--transition-medium);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(11, 20, 38, 0.92);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
    padding: 0.75rem 2.5rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.navbar-brand .logo {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--bg-primary);
    box-shadow: var(--glow-blue);
    transition: var(--transition-fast);
}

.navbar-brand:hover .logo {
    transform: scale(1.05);
    box-shadow: var(--glow-blue-strong);
}

.navbar-brand .brand-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

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

.navbar-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.navbar-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
    box-shadow: var(--glow-blue);
    transform: translateX(-50%);
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--text-primary);
}

.navbar-menu a:hover::after,
.navbar-menu a.active::after {
    width: 100%;
}

.navbar-cta {
    background: var(--gradient-blue);
    color: #fff;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition-fast);
    box-shadow: var(--glow-blue);
}

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

/* ========================================
   Buttons
   ======================================== */
.btn-primary {
    background: var(--gradient-blue);
    color: #fff;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
    box-shadow: var(--glow-blue);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: var(--transition-medium);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--glow-blue-strong);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--glass-bg);
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 7rem 2rem 5rem;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('images/hero-bg.jpg') center center/cover;
    filter: brightness(0.25) saturate(0.9);
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        rgba(11, 20, 38, 0.6) 0%,
        rgba(11, 20, 38, 0.4) 50%,
        rgba(11, 20, 38, 0.85) 100%
    );
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--accent-blue-light);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(12px);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 8px var(--accent-green);
}

.hero-title {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 2.5rem;
    min-height: 1.5em;
    line-height: 1.8;
}

.typing-text {
    display: inline;
    border-right: 2px solid var(--accent-blue);
    animation: blink 0.8s infinite;
}

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

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
    padding: 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.stat-item:hover {
    background: rgba(0, 180, 216, 0.05);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

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

/* ========================================
   Sections
   ======================================== */
section {
    padding: 7rem 2rem;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-badge {
    display: inline-block;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 1.2rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--accent-blue-light);
    margin-bottom: 1rem;
    backdrop-filter: blur(12px);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========================================
   Glass Card
   ======================================== */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: var(--glass-blur);
    transition: var(--transition-medium);
    box-shadow: var(--shadow-card);
}

.glass-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover), var(--glow-blue);
}

/* ========================================
   Services Section
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.service-card {
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-fast);
}

.service-card:hover::before {
    opacity: 1;
}

/* Service Icon - 优化图标样式 */
.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.15), rgba(0, 229, 160, 0.08));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.25), rgba(0, 229, 160, 0.15));
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
    transform: scale(1.05);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.service-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ========================================
   Advantage Section
   ======================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.advantage-card {
    text-align: center;
    padding: 2.5rem 2rem;
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.12), rgba(0, 229, 160, 0.08));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.advantage-card:hover .advantage-icon {
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.2), rgba(0, 229, 160, 0.12));
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
    transform: scale(1.08);
}

.advantage-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.advantage-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ========================================
   Partners Section
   ======================================== */
.partners-section {
    background: var(--bg-secondary);
}

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

.partners-category h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--accent-blue-light);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.partners-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.partner-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.partner-item:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
    box-shadow: var(--glow-blue);
}

/* ========================================
   News / Blog Section
   ======================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-category {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-blue-light);
    margin-bottom: 1rem;
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent-blue);
}

.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent-blue-light);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--accent-blue);
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-bottom {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin: 0.3rem 0;
}

/* ========================================
   Mobile Menu
   ======================================== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: 2px;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background: rgba(11, 20, 38, 0.98);
    backdrop-filter: var(--glass-blur);
    padding: 1rem;
    z-index: 9999;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-nav-link {
    display: block;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

/* ========================================
   Animations
   ======================================== */
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

@keyframes blink {
    0%, 100% { border-color: var(--accent-blue); }
    50% { border-color: transparent; }
}

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

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .navbar-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 6rem 1.5rem 3rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    section {
        padding: 4rem 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   Page Header (for inner pages)
   ======================================== */
.page-header {
    text-align: center;
    padding: 10rem 2rem 4rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ========================================
   About Page
   ======================================== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-intro img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

@media (max-width: 768px) {
    .about-intro {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ========================================
   Contact Page
   ======================================== */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.08), rgba(0, 229, 160, 0.04));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    margin: 4rem 0;
}

.cta-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-section p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}