/* 杏树林官网 - 通用样式 */

:root {
    --primary-bg: #0a0e1a;
    --secondary-bg: #151923;
    --text-light: #e8eaed;
    --text-secondary: #9aa0a6;
    --accent-color: #ff9900;
    --accent-hover: #cc7a00;
    --border-color: #2d3139;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    /* border-bottom: 1px solid var(--border-color); */
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    /*justify-content: space-between;*/
    align-items: center;
    transition: padding 0.3s ease;
}

.navbar.scrolled .nav-container {
    padding: 0.6rem 2rem;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo-img {
    height: 30px;
    width: auto;
    transition: all 0.3s ease;
}

.navbar.scrolled .logo-img {
    height: 32px;
}

.company-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    cursor: pointer;
    user-select: none;
    position: relative;
    display: inline-block;
}

.navbar.scrolled .company-name {
    font-size: 1.3rem;
}

.company-name span {
    display: inline-block;
    position: relative;
    color: #ffffff;
}

/* 保持空格可见 */
.company-name span.space {
    width: 0.5em;
}

.logo-wrapper:hover .company-name {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin-left: auto;
}

.nav-menu > li {
    position: relative;
}

.nav-menu a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    display: block;
    padding: 0.5rem 0;
}

.navbar.scrolled .nav-menu a {
    font-size: 0.95rem;
}

.nav-menu a:hover {
    color: var(--accent-color);
}

.nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-menu > li > a:hover::after {
    width: 100%;
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(21, 25, 35, 0.98);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 200px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
    margin-top: 0.5rem;
}

.nav-menu > li:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    padding: 0.8rem 1.5rem;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.dropdown-menu a:hover {
    background: rgba(255, 153, 0, 0.1);
    color: var(--accent-color);
    padding-left: 2rem;
}

.dropdown-menu a::after {
    display: none;
}

/* 主要内容区域 */
.main-content {
    margin-top: 40px;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

/* Hero 区域 */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    isolation: isolate;
}

/* WebGL Canvas 背景 */
.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.hero-content {
    position: relative;
    z-index: 100;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #ffffff;
    margin-bottom: 3rem;
    line-height: 1.8;
}

/* AI Chat 输入框 */
.ai-chat-input {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 1rem;
}

.ai-chat-input input {
    flex: 1;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: #ffffff;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.ai-chat-input input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.ai-chat-input input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
}

.ai-chat-input input:focus::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.ai-chat-input button {
    padding: 1rem 2.5rem;
    background: var(--accent-color);
    border: none;
    border-radius: 50px;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.ai-chat-input button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 153, 0, 0.3);
}

/* 三板块价值主张 */
.value-propositions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.value-card {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.value-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.value-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.value-keywords {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.value-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
}

.value-link:hover {
    gap: 1rem;
}

/* 数据展示 */
.data-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.data-item {
    text-align: center;
    padding: 2rem;
}

.data-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.data-label {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 特色板块 */
.feature-section {
    margin: 4rem 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.feature-image {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.feature-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.feature-list {
    list-style: none;
    margin: 2rem 0;
}

.feature-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

/* 按钮 */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent-color);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 153, 0, 0.3);
}

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

.btn-secondary:hover {
    background: var(--accent-color);
    color: #fff;
}

/* 客户Logo墙 */
.logo-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    padding: 3rem 0;
    opacity: 0.7;
}

.logo-wall img {
    height: 50px;
    filter: grayscale(100%);
    transition: all 0.3s ease;
}

.logo-wall img:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* 新闻卡片 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.news-card {
    background: var(--secondary-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.news-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.news-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.news-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

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

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }

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

    .value-propositions {
        grid-template-columns: 1fr;
    }

    .data-showcase {
        grid-template-columns: 1fr 1fr;
    }
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease-out;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 标题样式 */
.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 4rem;
}