/**
 * 金牛网主样式表
 * 主色调: #C2B59B (金色)
 * 辅助色: #FFFFFF (白色)
 * 文字色: #ADADAD (灰色)
 */

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #C2B59B;
    --color-primary-dark: #a8997d;
    --color-primary-light: #d4c9b5;
    --color-white: #FFFFFF;
    --color-gray: #ADADAD;
    --color-gray-light: #e0e0e0;
    --color-dark: #1a1a1a;
    --color-dark-light: #333333;
    --color-bg: #f5f5f5;
    --color-bg-dark: #0a0a0a;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

.btn-block {
    width: 100%;
}

/* 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);
    border-bottom: 1px solid rgba(194, 181, 155, 0.2);
    transition: var(--transition);
}

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

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.navbar-logo img {
    height: 40px;
    width: auto;
}

.navbar-logo span {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-dark);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.navbar-nav a {
    color: var(--color-dark-light);
    font-size: 14px;
    font-weight: 500;
    position: relative;
    padding: 8px 0;
}

.navbar-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

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

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

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 搜索框 */
.search-box {
    position: relative;
}

.search-box input {
    width: 240px;
    padding: 10px 40px 10px 16px;
    border: 1px solid var(--color-gray-light);
    border-radius: 24px;
    font-size: 14px;
    transition: var(--transition);
    background: var(--color-bg);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    width: 300px;
    background: var(--color-white);
}

.search-box button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--color-gray);
}

.search-box button:hover {
    color: var(--color-primary);
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1a1a2e 50%, var(--color-bg-dark) 100%);
    position: relative;
    overflow: hidden;
    padding: 100px 24px 60px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(194, 181, 155, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(194, 181, 155, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero h1 span {
    color: var(--color-primary);
}

.hero p {
    font-size: 20px;
    color: var(--color-gray);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-actions .btn {
    padding: 16px 32px;
    font-size: 16px;
}

/* AI聊天区域 */
.ai-section {
    width: 100%;
    max-width: 800px;
    margin: 60px auto 0;
    position: relative;
    z-index: 1;
}

.ai-container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(194, 181, 155, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.ai-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.ai-header svg {
    width: 24px;
    height: 24px;
}

.ai-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.ai-chat-area {
    min-height: 200px;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
}

.ai-message {
    margin-bottom: 16px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.ai-message.user {
    text-align: right;
}

.ai-message .bubble {
    display: inline-block;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    max-width: 80%;
    word-wrap: break-word;
}

.ai-message.user .bubble {
    background: var(--color-primary);
    color: var(--color-white);
}

.ai-message.assistant .bubble {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    text-align: left;
}

.ai-input-area {
    display: flex;
    gap: 12px;
}

.ai-input-area input {
    flex: 1;
    padding: 14px 20px;
    border: 1px solid rgba(194, 181, 155, 0.3);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
    font-size: 15px;
    transition: var(--transition);
}

.ai-input-area input::placeholder {
    color: var(--color-gray);
}

.ai-input-area input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.1);
}

.ai-input-area button {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.ai-input-area button:hover {
    background: var(--color-primary-dark);
    transform: scale(1.05);
}

.ai-input-area button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.ai-disclaimer {
    margin-top: 12px;
    font-size: 12px;
    color: var(--color-gray);
    text-align: center;
}

/* 主要内容区域 */
.main-content {
    padding: 80px 24px;
    max-width: 1400px;
    margin: 0 auto;
}

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

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

.section-header h2 span {
    color: var(--color-primary);
}

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

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(194, 181, 155, 0.1);
}

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

.card-image {
    height: 180px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-image svg {
    width: 64px;
    height: 64px;
    color: var(--color-white);
    opacity: 0.8;
}

.card-content {
    padding: 24px;
}

.card-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-dark);
}

.card-content p {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--color-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-link:hover {
    gap: 8px;
}

.card-link.disabled {
    color: var(--color-gray);
    pointer-events: none;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 24px;
    border: 1px solid var(--color-gray-light);
    border-radius: 24px;
    background: var(--color-white);
    color: var(--color-dark-light);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.category-tab:hover,
.category-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* 新闻列表 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.news-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    padding: 12px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.news-date .day {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.news-date .month {
    font-size: 12px;
    color: var(--color-gray);
    text-transform: uppercase;
}

.news-content {
    flex: 1;
}

.news-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-dark);
}

.news-content p {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
}

.news-meta {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--color-gray);
}

/* 页脚 */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 60px 24px 24px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

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

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

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

.footer-section a {
    color: var(--color-gray);
    font-size: 14px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

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

.footer-bottom a {
    color: var(--color-gray);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-nav {
        display: none;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .search-box input {
        width: 180px;
    }
    
    .search-box input:focus {
        width: 200px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(194, 181, 155, 0.3);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 提示框 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

/* 文本工具类 */
.text-muted {
    color: var(--color-gray);
}

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

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