/* 全局重置与变量 */
:root {
    --primary: #2b3e5a;
    --primary-dark: #1d2b3f;
    --accent: #f9a826;
    --accent-hover: #e0991f;
    --text-light: #ffffff;
    --text-dark: #333333;
    --bg-light: #f8f9fa;
    --border-radius: 8px;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
}

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

/* 按钮样式 (复刻官网) */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-light);
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-outline {
    background: transparent;
    color: var(--text-light);
    border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
}

.btn-large {
    padding: 14px 36px;
    font-size: 1.1rem;
}

/* 页眉 */
.site-header {
    background: var(--primary-dark);
    color: #fff;
    padding: 15px 0;
    border-bottom: 3px solid var(--accent);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo a {
    display: flex;
    align-items: center;
    color: #fff;
    text-decoration: none;
    font-size: 1.6rem;
    font-weight: 300;
}
.logo-icon {
    background: var(--accent);
    padding: 8px 10px;
    border-radius: var(--border-radius);
    margin-right: 12px;
}
.logo-icon i {
    font-size: 1.8rem;
    color: #fff;
}
.logo-text strong {
    font-weight: 700;
}
.logo-tagline {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-left: 15px;
    font-weight: 300;
}

.main-nav a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    margin: 0 15px;
    transition: var(--transition);
}
.main-nav a:hover {
    color: #fff;
}

.header-actions .btn {
    margin-left: 10px;
}

/* Hero 区域 */
.hero {
    background: var(--primary);
    color: #fff;
    padding: 80px 0;
    text-align: center;
    position: relative;
}
.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: 20px;
}
.hero-content .highlight {
    color: var(--accent);
    font-weight: 700;
}
.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 35px;
}
.hero-actions .btn {
    margin: 0 8px;
}
.hero-badge {
    margin-top: 40px;
}
.badge-new {
    background: rgba(249, 168, 38, 0.2);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    border: 1px solid var(--accent);
}

/* 通用 section */
.section-title {
    font-size: 2.2rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 10px;
}
.section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
}

/* 功能网格 */
.features-grid {
    padding: 70px 0;
    background: #fff;
}
.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.feature-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}
.feature-item i {
    font-size: 2.8rem;
    color: var(--accent);
    margin-bottom: 20px;
}
.feature-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.feature-item p {
    color: #666;
    font-size: 0.95rem;
}

/* 步骤 */
.how-it-works {
    background: var(--bg-light);
    padding: 70px 0;
}
.steps {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px 40px;
}
.step {
    display: flex;
    align-items: center;
    gap: 12px;
}
.step-number {
    background: var(--accent);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}
.step-text {
    font-size: 1.1rem;
    font-weight: 500;
}

/* 最新新闻 */
.latest-news {
    padding: 70px 0;
}
.news-item {
    padding: 25px 0;
    border-bottom: 1px solid #eee;
}
.news-item:last-child {
    border-bottom: none;
}
.news-item h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}
.news-item h3 a {
    color: var(--primary-dark);
    text-decoration: none;
}
.news-item p {
    color: #555;
    margin-bottom: 10px;
}
.read-more {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}
.news-meta {
    margin-top: 12px;
    font-size: 0.85rem;
    color: #888;
}
.news-meta span {
    margin-right: 20px;
}
.news-meta i {
    margin-right: 5px;
}

/* 页脚 */
.site-footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 30px 0;
}
.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.footer-social a {
    color: #fff;
    margin-left: 20px;
    font-size: 1.2rem;
    opacity: 0.7;
    transition: var(--transition);
}
.footer-social a:hover {
    opacity: 1;
}

/* 响应式 */
@media (max-width: 768px) {
    .grid-3col { grid-template-columns: 1fr; }
    .site-header .container { flex-direction: column; gap: 15px; }
    .hero-content h1 { font-size: 2rem; }
}
/* ===== 导航菜单专用样式 ===== */

/* 基础导航容器 */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 5px;
    flex-wrap: wrap;
}

/* 导航项 */
.nav-item {
    position: relative;
    padding: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.25s ease;
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
}

.nav-link i {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 悬停和激活状态 */
.nav-link:hover,
.nav-item.active .nav-link {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.nav-item.active .nav-link {
    background: rgba(249, 168, 38, 0.25);
    color: #f9a826;
}

/* ===== 下拉菜单 ===== */
.nav-dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-toggle .fa-chevron-down {
    font-size: 0.7rem;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-toggle .fa-chevron-down {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #ffffff;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 8px 0;
    list-style: none;
    margin: 8px 0 0 0;
    z-index: 1000;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

/* 下拉菜单小三角 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 12px;
    height: 12px;
    background: #ffffff;
    transform: rotate(45deg);
    border-left: 1px solid rgba(0, 0, 0, 0.06);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-link {
    display: block;
    padding: 8px 20px;
    color: #333333;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.15s ease;
}

.dropdown-link:hover {
    background: #f5f6f8;
    color: #1d2b3f;
}

.dropdown-link i {
    margin-right: 8px;
    color: #f9a826;
    width: 18px;
    text-align: center;
}

/* ===== 移动端响应式 ===== */
@media (max-width: 992px) {
    .main-nav {
        width: 100%;
        order: 3;
        margin-top: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 10px;
    }
    
    .nav-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: rgba(255, 255, 255, 0.05);
        margin: 5px 0 0 0;
        border-radius: 6px;
        padding: 5px 0;
        transform: none;
        opacity: 1;
        visibility: visible;
        display: none;
    }
    
    .dropdown-menu::before {
        display: none;
    }
    
    .dropdown-link {
        color: rgba(255, 255, 255, 0.8);
        padding: 6px 20px;
        font-size: 0.85rem;
    }
    
    .dropdown-link:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
    }
    
    /* 移动端点击展开下拉 */
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
}

@media (max-width: 576px) {
    .nav-list {
        gap: 2px;
    }
    
    .nav-link {
        padding: 4px 10px;
        font-size: 0.8rem;
    }
    
    .nav-link i {
        display: none; /* 小屏幕隐藏图标节省空间 */
    }
}