/* ========================================
   公司官网 - 全局样式表 v2.0
   设计升级版 | 2025-04-27
   ======================================== */

:root {
    /* 主色系 */
    --primary: #10B981;
    --primary-dark: #059669;
    --primary-light: #D1FAE5;
    
    /* 背景色 */
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-dark: #0F172A;
    
    /* 文字色 */
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --text-light: #94A3B8;
    
    /* CTA色 */
    --cta-red: #EF4444;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --gradient-dark: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E3A5F 50%, #0F172A 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 间距 */
    --container-max: 1200px;
    --section-gap: 100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
}

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

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 40px;
    width: auto;
    border-radius: 8px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav > a {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-gray);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav > a:hover {
    color: var(--text-dark);
    background: var(--bg-light);
}

.nav > a.active {
    color: var(--primary);
    background: rgba(16, 185, 129, 0.1);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-gray);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-dropdown-btn:hover {
    color: var(--text-dark);
    background: var(--bg-light);
}

.nav-dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 8px;
    min-width: 180px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-dropdown:hover .nav-dropdown-content {
    display: block;
    animation: fadeIn 0.2s ease;
}

.nav-dropdown-content a {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--text-gray);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav-dropdown-content a:hover {
    color: var(--primary);
    background: rgba(16, 185, 129, 0.1);
}

.header-cta {
    padding: 10px 20px;
    background: var(--cta-red);
    color: white;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.header-cta:hover {
    background: #DC2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(16, 185, 129, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 40%);
    animation: float 20s ease-in-out infinite;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(16, 185, 129, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16, 185, 129, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(16, 185, 129, 0.5);
    border-radius: 50%;
    animation: particleFloat 15s ease-in-out infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 30%; top: 60%; animation-delay: 2s; }
.particle:nth-child(3) { left: 50%; top: 30%; animation-delay: 4s; }
.particle:nth-child(4) { left: 70%; top: 70%; animation-delay: 6s; }
.particle:nth-child(5) { left: 90%; top: 40%; animation-delay: 8s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -20px) rotate(5deg); }
    50% { transform: translate(-10px, 20px) rotate(-5deg); }
    75% { transform: translate(-20px, -10px) rotate(3deg); }
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.5; }
    50% { transform: translateY(-100px) scale(1.5); opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 50px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    letter-spacing: -1px;
    line-height: 1.2;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    line-height: 1.6;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 80px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Feature Cards */
.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    text-align: left;
    transition: all 0.3s ease;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
    border-color: rgba(16, 185, 129, 0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(16, 185, 129, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Section Styles ===== */
.section {
    padding: var(--section-gap) 0;
}

.section-gray {
    background: var(--bg-light);
}

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

.section-label {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

.highlight {
    color: var(--primary);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.stat-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -2px;
}

.stat-unit {
    font-size: 24px;
    color: var(--primary);
}

.stat-label {
    font-size: 15px;
    color: var(--text-gray);
}

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

.service-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.2));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap 0.2s ease;
}

.service-link:hover {
    gap: 10px;
}

/* ===== Why Choose Us ===== */
.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.why-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.why-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
}

.why-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

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

/* ===== CTA Section ===== */
.cta-section {
    background: var(--gradient-primary);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: white;
    color: var(--primary);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .logo {
    margin-bottom: 8px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.7;
    max-width: 280px;
}

.footer h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 12px;
}

.footer ul li a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer ul li a:hover {
    color: var(--primary);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 16px !important;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.2s ease;
}

.footer-bottom a:hover {
    color: white;
}

/* ===== Product Cards ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.product-card {
    display: flex;
    gap: 24px;
    background: var(--bg-white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.product-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.25));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
}

.product-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.product-content p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary);
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero h1 { font-size: 44px; }
    .section-title { font-size: 32px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav { display: none; }
    .hero h1 { font-size: 32px; }
    .hero-subtitle { font-size: 16px; }
    .hero-features { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .stats-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr; }
    .product-card { flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}