/* AIcodinggroup - 科技风样式 */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #7ee787;
    --accent-pink: #f778ba;
    --accent-orange: #ffa657;
    --border-color: #30363d;
    --font-code: 'JetBrains Mono', monospace;
    --font-cn: 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-cn);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-family: var(--font-code);
    color: var(--accent-blue);
    font-size: 28px;
    font-weight: 700;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-blue);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
}

/* 首屏区域 */
.hero {
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(88, 166, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(126, 231, 135, 0.08) 0%, transparent 40%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: -1;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.code-bracket {
    font-family: var(--font-code);
    color: var(--accent-blue);
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: var(--font-code);
}

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

.hero-visual {
    display: flex;
    justify-content: center;
}

.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    font-family: var(--font-code);
    font-size: 14px;
    line-height: 1.8;
}

.code-line {
    white-space: pre;
}

.keyword { color: var(--accent-pink); }
.var { color: var(--accent-orange); }
.property { color: var(--accent-blue); }
.string { color: var(--accent-green); }
.function { color: var(--accent-blue); }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: #79b8ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.3);
}

/* 通用区块 */
.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 48px;
}

/* 分类卡片 */
.categories {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s;
}

.category-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(88, 166, 255, 0.1);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.category-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.category-count {
    font-size: 12px;
    color: var(--accent-blue);
    font-family: var(--font-code);
}

/* 特性区块 */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent-green);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
}

/* 群组页面 */
.groups-section {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.page-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 40px;
}

.search-area {
    max-width: 800px;
    margin: 0 auto 40px;
}

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 14px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.search-btn {
    padding: 14px 24px;
    background: var(--accent-blue);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.filter-tag {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

.filter-tag:hover,
.filter-tag.active {
    background: var(--accent-blue);
    color: var(--bg-primary);
    border-color: var(--accent-blue);
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.group-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s;
}

.group-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
}

.group-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.group-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.group-tag {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    color: var(--accent-blue);
    font-family: var(--font-code);
}

.group-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.group-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.group-count {
    font-size: 14px;
    color: var(--text-secondary);
}

.group-count span {
    color: var(--accent-green);
    font-weight: 500;
}

.group-category {
    font-size: 12px;
    padding: 4px 10px;
    background: rgba(88, 166, 255, 0.1);
    border-radius: 4px;
    color: var(--accent-blue);
}

.btn-join {
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-join:hover {
    background: var(--accent-blue);
    color: var(--bg-primary);
}

.no-result {
    text-align: center;
    padding: 60px;
    color: var(--text-secondary);
}

/* 关于页面 */
.about-section {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-block {
    margin-bottom: 48px;
}

.about-block h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--accent-blue);
}

.about-block > p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.value-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.value-icon {
    font-size: 32px;
    margin-bottom: 12px;
    display: block;
}

.value-item h3 {
    margin-bottom: 8px;
}

.value-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: var(--accent-blue);
    border-radius: 50%;
}

.timeline-content h3 {
    color: var(--accent-blue);
    margin-bottom: 4px;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* 联系页面 */
.contact-section {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-wechat {
    text-align: center;
    margin-bottom: 48px;
}

.contact-wechat h2 {
    margin-bottom: 8px;
}

.contact-wechat > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.wechat-qr {
    display: flex;
    justify-content: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.info-icon {
    font-size: 32px;
}

.info-item h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.info-item p {
    font-size: 16px;
}

.contact-form-section h2 {
    margin-bottom: 24px;
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    font-family: var(--font-cn);
}

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

.form-tip {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    max-width: 400px;
    width: 90%;
    position: relative;
    text-align: center;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

.qr-box {
    width: 180px;
    height: 180px;
    background: white;
    margin: 20px auto;
    border-radius: 8px;
}

.modal-tip {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 页脚 - 三栏对称布局 */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 28px 0;
    margin-top: 80px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-section {
    display: flex;
    align-items: center;
}

/* 左侧 - 公司名称 */
.footer-section.footer-brand {
    flex: 1;
    min-width: 200px;
}

.company-name {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 中间 - 链接 */
.footer-section.footer-links {
    flex: 2;
    justify-content: center;
    gap: 0;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 12px;
    transition: color 0.3s;
}

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

.footer-divider {
    color: var(--border-color);
    font-size: 14px;
    user-select: none;
}

/* 右侧 - 备案号 */
.footer-section.footer-icp {
    flex: 1;
    justify-content: flex-end;
    min-width: 200px;
}

.icp-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.icp-link:hover {
    color: var(--accent-blue);
}

/* 响应式 */
@media (max-width: 1024px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .groups-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .category-grid,
    .feature-grid,
    .groups-grid,
    .values-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-section {
        justify-content: center !important;
        flex-wrap: wrap;
    }
    
    .footer-section.footer-brand,
    .footer-section.footer-icp {
        min-width: auto;
    }
    
    .footer-section.footer-links {
        order: -1;
        flex-wrap: wrap;
    }
    
    .footer-links a {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .company-name {
        font-size: 13px;
    }
    
    .icp-link {
        font-size: 13px;
    }
}
/* 导航高亮样式 */
.nav-link.highlight,
.nav-menu a.highlight {
    color: #7ee787 !important;
    font-weight: 600;
}
.nav-link.highlight:hover,
.nav-menu a.highlight:hover {
    color: #58a6ff !important;
}

/* 导航动态图标 */
.nav-animate {
    display: inline-block;
    animation: arrowRight 1s ease-in-out infinite;
}
@keyframes arrowRight {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(4px); }
}

/* 底部备案号 */
.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.footer-brand {
    text-align: left;
}
.footer-links {
    display: flex;
    gap: 24px;
}
.footer-beian {
    text-align: center;
    width: 100%;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 12px;
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 12px;
}
.footer-bottom .footer-links {
    display: flex;
    gap: 16px;
}
.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
}
.footer-bottom a:hover {
    color: var(--accent-blue);
}
.footer-beian a {
    color: var(--text-secondary);
    text-decoration: none;
}
.footer-beian a:hover {
    color: var(--accent-blue);
}

@media (max-width: 768px) {
    .footer-top {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .footer-brand {
        text-align: center;
    }
    .footer-links {
        justify-content: center;
    }
}