/* ========================================
   全局样式重置与基础设置
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: #fff;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

a:hover {
    color: #ff6600;
}

ul, ol {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ========================================
   导航栏样式
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #fff;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(0,0,0,0.12);
}

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

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: #333;
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60%;
}

.logo span {
    color: #ff6600;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-menu a {
    padding: 8px 16px;
    font-size: 0.95em;
    font-weight: 500;
    color: #555;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #ff6600;
    background: rgba(255, 102, 0, 0.08);
}

.nav-search {
    position: relative;
    margin-left: 20px;
}

.nav-search .search-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.nav-search .search-icon:hover {
    background: rgba(255, 102, 0, 0.1);
}

.nav-search .search-box {
    position: absolute;
    right: 0;
    top: 50px;
    width: 280px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    padding: 15px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.nav-search .search-box.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-search .search-box input {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #eee;
    border-radius: 8px;
    font-size: 0.9em;
    outline: none;
    transition: border-color 0.3s ease;
}

.nav-search .search-box input:focus {
    border-color: #ff6600;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: #333;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ========================================
   Banner/页面头部样式
   ======================================== */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 0 60px;
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::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 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>') repeat;
    background-size: 100px;
    opacity: 0.3;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.page-header h1 small {
    font-size: 0.4em;
    font-weight: 400;
    opacity: 0.8;
    margin-left: 10px;
}

.page-header p {
    font-size: 1.1em;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: 80px 0;
}

.section-light {
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2em;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 1.05em;
    max-width: 600px;
    margin: 0 auto;
}

.section-title .line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* ========================================
   卡片组件样式
   ======================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.card-img {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-img img {
    transform: scale(1.08);
}

.card-img .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: 30px 20px 20px;
    color: #fff;
}

.card-img .overlay h4 {
    font-size: 1.2em;
    margin-bottom: 5px;
}

.card-img .overlay p {
    font-size: 0.9em;
    opacity: 0.9;
}

.card-body {
    padding: 25px;
}

.card-body h3 {
    font-size: 1.3em;
    color: #333;
    margin-bottom: 12px;
}

.card-body p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.card-body .btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border-radius: 25px;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.card-body .btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

/* ========================================
   统计数据样式
   ======================================== */
.stats-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item .number {
    font-size: 3em;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item .label {
    font-size: 1em;
    opacity: 0.9;
}

/* ========================================
   特色列表样式
   ======================================== */
.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.feature-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}

.feature-item .icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    color: #fff;
    font-size: 1.3em;
    flex-shrink: 0;
}

.feature-item .content h4 {
    font-size: 1.1em;
    color: #333;
    margin-bottom: 8px;
}

.feature-item .content p {
    color: #666;
    font-size: 0.9em;
    line-height: 1.6;
}

/* ========================================
   按钮样式
   ======================================== */
.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border-radius: 25px;
    font-size: 1em;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: #fff;
}

.btn-outline {
    display: inline-block;
    padding: 12px 30px;
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    border-radius: 25px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: #667eea;
    color: #fff;
}

/* ========================================
   CTA行动号召样式
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.cta-section h2 {
    font-size: 2.5em;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 1.1em;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-section .btn-cta {
    display: inline-block;
    padding: 15px 40px;
    background: #fff;
    color: #667eea;
    border-radius: 30px;
    font-size: 1.1em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-section .btn-cta:hover {
    background: #333;
    color: #fff;
    transform: scale(1.05);
}

/* ========================================
   页脚样式
   ======================================== */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h3 {
    font-size: 1.3em;
    margin-bottom: 20px;
    color: #fff;
}

.footer-col p {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 15px;
}

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

.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    transition: all 0.3s ease;
}

.footer-col ul li a:hover {
    color: #ff6600;
    padding-left: 5px;
}

.footer-col .contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    color: rgba(255,255,255,0.7);
}

.footer-col .contact-item i {
    color: #ff6600;
    font-size: 1.1em;
}

.footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 0.9em;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: #fff;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #ff6600;
    transform: translateY(-3px);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .logo {
        font-size: 1.1em;
        max-width: 55%;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1001;
    }
    
    .nav-menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }
    
    .nav-search {
        margin-left: 0;
    }
    
    .page-header {
        padding: 100px 0 40px;
    }
    
    .page-header h1 {
        font-size: 1.8em;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title h2 {
        font-size: 1.8em;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-item .number {
        font-size: 2em;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 0.95em;
        max-width: 50%;
    }
    
    .page-header h1 {
        font-size: 1.5em;
    }
    
    .page-header p {
        font-size: 0.95em;
    }
    
    .cta-section h2 {
        font-size: 1.8em;
    }
}