/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fadeIn {
    animation: fadeIn 1s ease-out forwards;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* 头部和导航 */
header {
    background: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    padding: 10px 18px;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 15px;
}

.nav-links a:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.nav-btn {
    background: var(--gradient-primary) !important;
    color: var(--white) !important;
    padding: 10px 24px !important;
    border-radius: 25px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease !important;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.4) !important;
}

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://picsum.photos/seed/ouyihero/1920/1080') center/cover no-repeat;
    opacity: 0.15;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-delay: 1s; }
.particle:nth-child(3) { left: 30%; animation-delay: 2s; }
.particle:nth-child(4) { left: 40%; animation-delay: 3s; }
.particle:nth-child(5) { left: 50%; animation-delay: 4s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.particle:nth-child(7) { left: 70%; animation-delay: 0.5s; }
.particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
.particle:nth-child(9) { left: 90%; animation-delay: 2.5s; }

.hero-content {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.hero-text {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 8px 16px;
    border-radius: 25px;
    font-size: 14px;
    color: #60a5fa;
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-title span {
    background: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 18px;
    color: #94a3b8;
    margin-bottom: 35px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.hero-image {
    position: relative;
    animation: fadeIn 1s ease-out 0.8s both;
}

.hero-image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
    animation: float 4s ease-in-out infinite;
}

.hero-image-wrapper img {
    width: 100%;
    display: block;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
    animation: fadeInUp 0.8s ease-out 1s both;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: #94a3b8;
}

/* 核心特性区域 */
#features {
    padding: 100px 0;
    background: var(--light-bg);
}

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

.section-badge {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.feature-description {
    color: var(--text-light);
    line-height: 1.8;
}

/* 服务介绍区域 */
#services {
    padding: 100px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.service-card {
    display: flex;
    gap: 30px;
    padding: 40px;
    background: var(--light-bg);
    border-radius: 20px;
    transition: all 0.4s ease;
    align-items: flex-start;
}

.service-card:hover {
    background: var(--white);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    transform: translateX(10px);
}

.service-number {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--white);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.service-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.service-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.service-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* 详细信息区域 */
#details {
    padding: 100px 0;
    background: var(--gradient-dark);
    color: var(--white);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.details-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
}

.details-image img {
    width: 100%;
    display: block;
}

.details-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 25px;
}

.details-content p {
    color: #94a3b8;
    font-size: 17px;
    line-height: 1.9;
    margin-bottom: 30px;
}

.details-list {
    list-style: none;
}

.details-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 16px;
}

.details-list li:last-child {
    border-bottom: none;
}

.check-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    background: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

/* 数据统计区域 */
#statistics {
    padding: 80px 0;
    background: var(--white);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-box {
    text-align: center;
    padding: 40px 20px;
    background: var(--light-bg);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
}

.stat-value {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.stat-title {
    font-size: 16px;
    color: var(--text-light);
}

/* 常见问题区域 */
#faq {
    padding: 100px 0;
    background: var(--light-bg);
}

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

.faq-item {
    background: var(--white);
    margin-bottom: 15px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 17px;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    width: 30px;
    height: 30px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 18px;
}

.faq-item.active .faq-icon {
    background: var(--primary-color);
    color: var(--white);
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer-content {
    padding: 0 30px 25px;
    color: var(--text-light);
    line-height: 1.9;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

/* 行动号召区域 */
#cta {
    padding: 100px 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

#cta::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: float 10s ease-in-out infinite;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 10;
    color: var(--white);
}

.cta-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-white {
    background: var(--white);
    color: var(--primary-color);
    padding: 18px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 17px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.btn-outline-white {
    background: transparent;
    color: var(--white);
    padding: 18px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 17px;
    border: 2px solid var(--white);
    transition: all 0.3s ease;
}

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

/* 页脚 */
footer {
    background: var(--dark-bg);
    color: var(--white);
    padding-top: 80px;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.footer-brand {
    max-width: 350px;
}

.footer-brand .logo {
    margin-bottom: 25px;
}

.footer-brand .logo-text {
    font-size: 24px;
}

.footer-brand p {
    color: #94a3b8;
    line-height: 1.8;
    margin-bottom: 25px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 18px;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-column h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--white);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 15px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 30px 20px;
    text-align: center;
}

.footer-bottom-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 14px;
}

.footer-bottom-links {
    display: flex;
    gap: 30px;
}

.footer-bottom-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
    color: var(--white);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-title {
        font-size: 42px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .details-image {
        order: -1;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stat-item {
        padding: 15px;
    }

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

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

    .stats-container {
        grid-template-columns: 1fr;
    }

    .cta-content h2 {
        font-size: 32px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-white, .btn-outline-white {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .social-links {
        justify-content: center;
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

/* 移动端菜单展开 */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    gap: 10px;
}

.nav-links.active a {
    padding: 15px;
    text-align: center;
}