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

/* CSS变量定义 - 蓝红配色方案 */
:root {
    --primary-blue: #1e40af;
    --primary-blue-dark: #1e3a8a;
    --primary-blue-light: #3b82f6;
    --secondary-red: #dc2626;
    --secondary-red-dark: #b91c1c;
    --secondary-red-light: #ef4444;
    --accent-blue: #0ea5e9;
    --accent-red: #f87171;
    --neutral-dark: #1f2937;
    --neutral-medium: #6b7280;
    --neutral-light: #f9fafb;
    --white: #ffffff;
    --success-green: #10b981;
    --warning-orange: #f59e0b;
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-red) 0%, var(--accent-red) 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* 基础字体和布局 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--neutral-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(30, 64, 175, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-blue);
    text-decoration: none;
}

.nav-brand i {
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--neutral-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: var(--gradient-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links a:hover::after {
    width: 100%;
}

/* 主要横幅区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="%231e40af" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    z-index: 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--neutral-dark);
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--neutral-medium);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-blue);
    font-weight: 500;
}

.feature-item i {
    font-size: 1.2rem;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 1rem;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

/* 英雄图像 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.chart-container {
    position: relative;
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(30, 64, 175, 0.1);
}

.chart-icon {
    font-size: 6rem;
    color: var(--primary-blue);
    margin-bottom: 2rem;
    display: block;
    text-align: center;
}

.chart-data {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
}

.data-point {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

.data-point.up {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-green);
}

.data-point.down {
    background: rgba(220, 38, 38, 0.1);
    color: var(--secondary-red);
}

/* 通用区块样式 */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--neutral-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--neutral-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们区块 */
.about {
    background: var(--neutral-light);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid var(--primary-blue);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.card-icon i {
    font-size: 2rem;
    color: var(--white);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-dark);
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--neutral-medium);
    line-height: 1.6;
}

/* 服务内容区块 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid var(--secondary-red);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-dark);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--neutral-medium);
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style: none;
}

.service-card ul li {
    padding: 0.5rem 0;
    color: var(--neutral-medium);
    position: relative;
    padding-left: 1.5rem;
}

.service-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-green);
    font-weight: bold;
}

/* 分析报告区块 */
.analysis {
    background: var(--neutral-light);
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.analysis-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.analysis-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
}

.stock-symbol {
    background: var(--primary-blue);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

.price-change {
    font-weight: 600;
    font-size: 1.1rem;
}

.price-change.positive {
    color: var(--success-green);
}

.price-change.negative {
    color: var(--secondary-red);
}

.analysis-card h3 {
    padding: 0 1.5rem;
    margin: 1rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-dark);
}

.analysis-card p {
    padding: 0 1.5rem;
    color: var(--neutral-medium);
    line-height: 1.6;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-top: 1px solid #e5e7eb;
    margin-top: 1rem;
}

.rating {
    color: var(--warning-orange);
    font-weight: 500;
}

.date {
    color: var(--neutral-medium);
    font-size: 0.9rem;
}

/* WhatsApp区块 */
.whatsapp-section {
    background: var(--gradient-primary);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.whatsapp-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><circle cx="200" cy="200" r="2" fill="white" opacity="0.1"/><circle cx="800" cy="300" r="3" fill="white" opacity="0.1"/><circle cx="400" cy="600" r="2" fill="white" opacity="0.1"/><circle cx="700" cy="800" r="2" fill="white" opacity="0.1"/></svg>');
    z-index: 0;
}

.whatsapp-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.whatsapp-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.whatsapp-text p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.benefit-item i {
    color: var(--success-green);
    font-size: 1.1rem;
}

.whatsapp-cta {
    text-align: center;
}

.whatsapp-icon {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    backdrop-filter: blur(10px);
}

.whatsapp-icon i {
    font-size: 4rem;
    color: var(--white);
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: #25d366;
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.whatsapp-btn:hover {
    background: #128c7e;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.whatsapp-btn i {
    font-size: 1.5rem;
}

.disclaimer {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 联系我们区块 */
.contact {
    background: var(--neutral-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-3px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-dark);
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--neutral-medium);
}

/* 页脚 */
.footer {
    background: var(--neutral-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-section ul li i {
    margin-right: 0.5rem;
    color: var(--primary-blue-light);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-blue-light);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 1rem;
}

.close:hover {
    color: var(--neutral-dark);
}

.modal-content h3 {
    color: var(--neutral-dark);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.modal-content p {
    color: var(--neutral-medium);
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-features {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-links {
        display: none;
    }
    
    .whatsapp-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .benefits-list {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .chart-container {
        padding: 2rem;
    }
    
    .chart-icon {
        font-size: 4rem;
    }
    
    .about-card,
    .service-card {
        padding: 2rem;
    }
    
    .whatsapp-text h2 {
        font-size: 2rem;
    }
    
    .whatsapp-icon {
        width: 100px;
        height: 100px;
    }
    
    .whatsapp-icon i {
        font-size: 3rem;
    }
}

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

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

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-image {
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.whatsapp-icon {
    animation: pulse 2s infinite;
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 选择文本样式 */
::selection {
    background: var(--primary-blue-light);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-blue-light);
    color: var(--white);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue-dark);
}