/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #f97316;
    --dark: #1e1b4b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-400: #9ca3af;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 15px;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f5f7ff 0%, #fff5f5 50%, #f0f9ff 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-content h1 {
    font-size: 52px;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 50px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
}

/* 仪表盘预览 */
.dashboard-preview {
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.dashboard-preview:hover {
    transform: perspective(1000px) rotateY(0) rotateX(0);
}

.preview-header {
    background: var(--gray-100);
    padding: 12px 16px;
}

.preview-dots {
    display: flex;
    gap: 8px;
}

.preview-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-400);
}

.preview-dots span:first-child { background: #ef4444; }
.preview-dots span:nth-child(2) { background: #fbbf24; }
.preview-dots span:last-child { background: #22c55e; }

.preview-content {
    display: flex;
    min-height: 300px;
}

.preview-sidebar {
    width: 60px;
    background: var(--dark);
    padding: 20px 10px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sidebar-item {
    height: 40px;
    background: var(--gray-700);
    border-radius: 8px;
    opacity: 0.5;
}

.sidebar-item.active {
    background: var(--primary);
    opacity: 1;
}

.preview-main {
    flex: 1;
    padding: 30px;
    display: flex;
    align-items: flex-end;
}

.chart-placeholder {
    display: flex;
    gap: 20px;
    align-items: flex-end;
    width: 100%;
    height: 200px;
}

.chart-placeholder .bar {
    flex: 1;
    background: var(--gradient);
    border-radius: 8px 8px 0 0;
    animation: barGrow 2s ease-out infinite alternate;
}

@keyframes barGrow {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}


/* 功能特色 */
.features {
    padding: 100px 0;
    background: var(--white);
}

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

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--gray-600);
}

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

.feature-card {
    position: relative;
    background: var(--white);
    border-radius: 20px;
    padding: 40px 30px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-card.featured {
    background: var(--gradient);
    border: none;
    color: var(--white);
}

.feature-card.featured h3,
.feature-card.featured p,
.feature-card.featured li {
    color: var(--white);
}

.feature-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--secondary);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

.feature-card p {
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.feature-list li {
    padding: 8px 0;
    color: var(--gray-700);
    font-size: 14px;
}

.feature-list li::before {
    content: '✓';
    margin-right: 10px;
    color: var(--primary);
    font-weight: bold;
}

.feature-card.featured .feature-list li::before {
    color: var(--white);
}

/* 使用流程 */
.how-it-works {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.step {
    text-align: center;
    flex: 1;
    max-width: 280px;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    margin: 0 auto 24px;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.step-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.step-content p {
    color: var(--gray-600);
    font-size: 15px;
}

.step-line {
    width: 100px;
    height: 3px;
    background: var(--gradient);
    border-radius: 2px;
}

/* 价格方案 */
.pricing {
    padding: 100px 0;
    background: var(--white);
}

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

.pricing-card {
    position: relative;
    background: var(--white);
    border-radius: 20px;
    padding: 40px 30px;
    border: 1px solid var(--gray-200);
    text-align: center;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-5px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: var(--white);
    padding: 8px 24px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

.price {
    margin-bottom: 30px;
}

.currency {
    font-size: 24px;
    font-weight: 600;
    color: var(--dark);
    vertical-align: top;
}

.amount {
    font-size: 56px;
    font-weight: 700;
    color: var(--dark);
    line-height: 1;
}

.period {
    font-size: 16px;
    color: var(--gray-600);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}

.pricing-card .btn {
    width: 100%;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
}

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

.contact-info h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.contact-info p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    font-size: 18px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--white);
    font-size: 16px;
}

.contact-icon {
    font-size: 24px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 16px 20px;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-brand p {
    color: var(--gray-400);
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    padding: 8px 0;
    transition: color 0.3s;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 40px;
    }

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

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

    .hero-image {
        display: none;
    }

    .features-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-card.popular {
        transform: none;
    }

    .steps {
        flex-direction: column;
    }

    .step-line {
        width: 3px;
        height: 50px;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
        flex-wrap: wrap;
    }
}

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

    .navbar .btn {
        display: none;
    }

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

    .hero-content h1 {
        font-size: 32px;
    }

    .section-header h2 {
        font-size: 28px;
    }

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