/* ============================================
   江苏银初梦曜网络科技有限公司 - 企业官网
   设计风格：简约大气，蓝白配色
   ============================================ */

/* CSS Variables */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #60A5FA;
    --primary-bg: #EFF6FF;
    --accent: #0EA5E9;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --bg-white: #FFFFFF;
    --bg-gray: #F8FAFC;
    --bg-light: #F0F7FF;
    --border: #E2E8F0;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-en: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-cn);
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-en);
    font-weight: 700;
    font-size: 20px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
    transition: var(--transition);
    cursor: pointer;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 50%, #E0E7FF 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.hero-glow-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-light);
    top: -100px;
    right: -100px;
    animation: glowFloat 8s ease-in-out infinite;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    bottom: -100px;
    left: -100px;
    animation: glowFloat 10s ease-in-out infinite reverse;
}

@keyframes glowFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 80px 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 32px;
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero-title-highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-cn);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
    transform: translateY(-2px);
}

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.stat-number {
    font-family: var(--font-en);
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-plus,
.stat-percent {
    font-family: var(--font-en);
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-left: 6px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ========== Section Common ========== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========== About Section ========== */
.about {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.about-card {
    background: var(--bg-gray);
    border-radius: var(--radius);
    padding: 36px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.about-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.about-card-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.about-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Values */
.values-section {
    text-align: center;
}

.values-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 40px;
}

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

.value-item {
    padding: 32px 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.value-item:hover {
    border-color: var(--primary-light);
    background: var(--primary-bg);
}

.value-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--primary);
}

.value-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.value-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Products Section ========== */
.products {
    background: var(--bg-gray);
}

/* Featured Product */
.featured-product {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: linear-gradient(135deg, #1E3A5F 0%, #1E40AF 50%, #312E81 100%);
    border-radius: var(--radius-lg);
    padding: 56px;
    margin-bottom: 60px;
    overflow: hidden;
}

.featured-product-bg {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(96, 165, 250, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(167, 139, 250, 0.15) 0%, transparent 50%);
}

.featured-product-content {
    position: relative;
    z-index: 1;
    color: white;
}

.featured-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.featured-name {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.featured-slogan {
    font-size: 18px;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 20px;
    font-style: italic;
}

.featured-desc {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255,255,255,0.85);
    margin-bottom: 24px;
}

.featured-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.ff-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.9);
}

.featured-product .btn-primary {
    background: white;
    color: var(--primary);
    box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}

.featured-product .btn-primary:hover {
    background: var(--primary-bg);
    transform: translateY(-2px);
}

/* Featured Product Visual */
.featured-product-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-container {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-ring {
    position: absolute;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.15);
    animation: ringRotate 8s linear infinite;
}

.visual-ring-1 {
    width: 280px;
    height: 280px;
    animation-duration: 8s;
}

.visual-ring-2 {
    width: 220px;
    height: 220px;
    animation-duration: 6s;
    animation-direction: reverse;
    border-color: rgba(96, 165, 250, 0.3);
    border-style: dashed;
}

.visual-ring-3 {
    width: 160px;
    height: 160px;
    animation-duration: 4s;
    border-color: rgba(167, 139, 250, 0.3);
}

@keyframes ringRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.visual-center {
    position: relative;
    z-index: 2;
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.2);
}

.visual-orbit {
    position: absolute;
    inset: 0;
    animation: ringRotate 10s linear infinite;
}

.orbit-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-light);
    box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

.dot-1 { top: -4px; left: 50%; transform: translateX(-50%); }
.dot-2 { bottom: -4px; left: 50%; transform: translateX(-50%); }
.dot-3 { left: -4px; top: 50%; transform: translateY(-50%); }
.dot-4 { right: -4px; top: 50%; transform: translateY(-50%); }

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.service-card-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Contact Section ========== */
.contact {
    background: var(--bg-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* Contact Form */
.contact-form {
    background: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: var(--font-cn);
    color: var(--text-primary);
    background: var(--bg-white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ========== Footer ========== */
.footer {
    background: #0F172A;
    color: rgba(255,255,255,0.7);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand p {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255,255,255,0.08);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 15px;
    padding: 6px 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-links p {
    font-size: 14px;
    padding: 4px 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    font-size: 14px;
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ========== Animations ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .featured-product {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 40px 28px;
    }
    .featured-features {
        justify-content: center;
    }
    .featured-name {
        justify-content: center;
    }
    .featured-product-visual {
        order: -1;
    }
    .visual-container {
        width: 200px;
        height: 200px;
    }
    .visual-ring-1 { width: 200px; height: 200px; }
    .visual-ring-2 { width: 160px; height: 160px; }
    .visual-ring-3 { width: 120px; height: 120px; }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .section {
        padding: 60px 0;
    }

    .about-grid,
    .values-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .featured-product {
        padding: 32px 20px;
    }

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

    .contact-form {
        padding: 24px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }
}

/* ========== prefers-reduced-motion ========== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}