:root {
            --primary: #4c6ef5;
            --primary-dark: #3b5bdb;
            --secondary: #fa5252;
            --secondary-dark: #e03131;
            --accent: #ff922b;
            --light: #f8f9fa;
            --dark: #343a40;
            --gray: #6c757d;
            --success: #40c057;
            --border-radius: 12px;
            --shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        * {
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: #444;
            background-color: #fafbfc;
        }
        
        /* 头部导航优化 */
        #header {
            background: #fff;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            padding: 12px 15px;
        }
        
        #logo img {
            transition: var(--transition);
        }
        
        #logo img:hover {
            transform: scale(1.03);
        }
        
        /* 主内容区优化 */
        .main-content {
            padding: 30px 0;
        }
        
        .post-single {
            background: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 30px;
        }
        
        .post-header {
            padding: 40px 40px 20px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
        }
        
        .post-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 15px;
            line-height: 1.3;
        }
        
        .post-meta {
            margin-top: 20px;
        }
        
        .post-meta ul {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            padding: 0;
            margin: 0;
            list-style: none;
        }
        
        .post-meta li {
            display: flex;
            align-items: center;
            color: var(--gray);
            font-size: 0.95rem;
        }
        
        .post-meta i {
            margin-right: 8px;
            color: var(--primary);
        }
        
        .post-meta a {
            color: var(--gray);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .post-meta a:hover {
            color: var(--primary);
        }
        
        .post-content {
            padding: 40px;
        }
        
        /* 横幅广告样式 */
        .banner {
            margin: 30px 0;
            text-align: center;
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
        }
        
        .banner:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .banner img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        
        .top-banner {
            margin-top: 0;
        }
        
        /* 计算器样式优化 */
        .calculator {
            background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f5 100%);
            border-radius: var(--border-radius);
            padding: 35px;
            margin: 40px 0;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }
        
        .calculator::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        
        .calculator h2 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: var(--dark);
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }
        
        .calculator h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        
        .input-group {
            margin-bottom: 25px;
        }
        
        .input-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: var(--dark);
            font-size: 1.05rem;
        }
        
        .input-group input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e9ecef;
            border-radius: 10px;
            font-size: 1.1rem;
            transition: var(--transition);
            background: #fff;
        }
        
        .input-group input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(76, 110, 245, 0.15);
            outline: none;
        }
        
        .rate-comparison {
            display: flex;
            justify-content: space-between;
            margin: 30px 0;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .rate-card {
            flex: 1;
            min-width: 220px;
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        
        .rate-card:hover {
            transform: translateY(-5px);
        }
        
        .rate-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: rgba(255, 255, 255, 0.3);
        }
        
        .our-rate {
            background: linear-gradient(145deg, var(--primary), var(--primary-dark));
            color: white;
        }
        
        .competitor-rate {
            background: linear-gradient(145deg, #fff, #f8f9fa);
            border: 1px solid #e9ecef;
            color: var(--dark);
        }
        
        .rate-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            margin-bottom: 15px;
        }
        
        .rate-card p {
            font-size: 1.8rem;
            font-weight: 800;
            margin: 10px 0 0;
        }
        
        .competitor-rate p {
            color: var(--gray);
        }
        
        .result, .save-amount {
            font-size: 1.2rem;
            margin: 25px 0;
            padding: 20px;
            background: #fff;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-left: 4px solid var(--primary);
        }
        
        .save-amount {
            border-left-color: var(--accent);
            color: var(--accent);
            font-weight: 700;
        }
        
        #fee, #saving {
            font-weight: 800;
            font-size: 1.4rem;
        }
        
        .btn-apply {
            display: block;
            background: linear-gradient(145deg, var(--secondary), var(--secondary-dark));
            color: white;
            text-align: center;
            padding: 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            text-decoration: none;
            transition: var(--transition);
            margin-top: 30px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(250, 82, 82, 0.3);
        }
        
        .btn-apply:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(250, 82, 82, 0.4);
        }
        
        .btn-apply::after {
            content: '→';
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            transition: var(--transition);
        }
        
        .btn-apply:hover::after {
            transform: translate(5px, -50%);
        }
        
        .btn-call-to-action {
            display: block;
            background: linear-gradient(145deg, var(--secondary), var(--secondary-dark));
            color: white;
            text-align: center;
            padding: 22px;
            border-radius: 12px;
            font-weight: 800;
            font-size: 1.4rem;
            text-decoration: none;
            transition: var(--transition);
            margin: 40px 0;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(250, 82, 82, 0.35);
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
        }
        
        .btn-call-to-action:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 30px rgba(250, 82, 82, 0.45);
        }
        
        .btn-call-to-action::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
            transform: rotate(45deg);
            transition: var(--transition);
            animation: shine 3s infinite;
        }
        
        @keyframes shine {
            0% {
                left: -50%;
            }
            100% {
                left: 100%;
            }
        }
        
        .footer-banner {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 40px 0;
            text-align: center;
            border-left: 5px solid var(--primary);
        }
        
        .footer-banner p {
            margin: 10px 0;
            font-size: 1.1rem;
        }
        
        .footer-banner a {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
        }
        
        .footer-banner a:hover {
            text-decoration: underline;
        }
        
        /* 移动端适配 */
        @media (max-width: 992px) {
            .post-header, .post-content {
                padding: 30px;
            }
            
            .post-title {
                font-size: 1.8rem;
            }
        }
        
        @media (max-width: 768px) {
            #header {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                width: 100%;
                z-index: 9999;
            }
            .main-content {
                padding-top: 84px;
            }
            .post-header, .post-content {
                padding: 18px 12px;
            }
            
            .post-title {
                font-size: 1.6rem;
            }
            
            .post-meta ul {
                gap: 15px;
            }
            
            .calculator {
                padding: 25px 20px;
            }
            
            .rate-comparison {
                flex-direction: column;
            }
            
            .rate-card {
                margin: 0 0 20px 0;
                width: 100%;
            }
            
            .input-group input {
                padding: 16px 15px;
            }
            
            .btn-call-to-action {
                padding: 18px;
                font-size: 1.2rem;
            }
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .post-single {
            animation: fadeIn 0.6s ease-out;
        }
        
        .calculator {
            animation: fadeIn 0.8s ease-out;
        }
        
        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }
        
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        .post-content h2 {
            margin: 1.4em 0 0.7em;
            font-size: 1.35em;
            font-weight: 700;
            color: #343a40;
            border-left: 4px solid #4c6ef5;
            padding-left: 12px;
            line-height: 1.4;
        }

        /* ===== 正文排版优化 ===== */
        .post-content > p {
            font-size: 16px;
            line-height: 1.85;
            color: #333;
            margin: 0 0 1.2em;
            word-wrap: break-word;
        }
        .post-content > h3 {
            margin: 1.5em 0 0.8em;
            font-size: 1.15em;
            font-weight: 700;
            color: #343a40;
            border-left: 3px solid #4c6ef5;
            padding-left: 10px;
            line-height: 1.5;
        }
        /* 正文图片统一居中显示 */
        .post-content > p img,
        .post-content > img,
        .post-content > p > a > img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            display: block;
            margin-left: auto;
            margin-right: auto;
        }
        .post-content > p a {
            color: #4c6ef5;
            text-decoration: none;
            border-bottom: 1px solid rgba(76, 110, 245, 0.3);
            transition: all 0.3s ease;
        }
        .post-content > p a:hover {
            color: #3b5bdb;
            border-bottom-color: #3b5bdb;
        }
        /* 目录导航 TOC */
        .post-content > h2 + ul {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 20px 20px 20px 40px;
            margin: 0.5em 0 1.6em;
        }
        .post-content > h2 + ul li {
            line-height: 2;
        }
        .post-content > h2 + ul a {
            color: #444;
            border-bottom: none;
        }
        .post-content > h2 + ul a:hover {
            color: #4c6ef5;
        }

        /* ===== 相关推荐卡片 + 区块分隔 ===== */
        .related-posts-section {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid #f1f3f5;
        }
        .post-content h2.related-posts-title {
            border-left: none;
            padding-left: 12px;
            text-align: left;
            font-size: 1.15rem;
            font-weight: 600;
            margin: 0 0 20px;
            padding-bottom: 0;
            position: relative;
        }
        .post-content h2.related-posts-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 2px;
            width: 3px;
            height: calc(100% - 4px);
            background: #4c6ef5;
            border-radius: 2px;
        }
        .post-content h2.related-posts-title::after {
            content: none;
        }
        .related-posts-grid {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .related-card {
            display: flex;
            align-items: stretch;
            background: #fff;
            border: 1px solid #eef1f4;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .related-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
            border-color: rgba(76, 110, 245, 0.35);
        }
        .related-thumb {
            flex: 0 0 168px;
            width: 168px;
            min-height: 105px;
            position: relative;
            overflow: hidden;
            background: #f1f3f5;
            display: block;
        }
        .related-thumb img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
            border-radius: 0;
            box-shadow: none;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.05);
        }
        .related-body {
            flex: 1;
            min-width: 0;
            padding: 14px 18px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .related-card h3.related-item-title {
            font-size: 1rem;
            font-weight: 600;
            color: #343a40;
            line-height: 1.5;
            margin: 0;
            border-left: none;
            padding-left: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card h3.related-item-title::before {
            content: none;
        }
        .related-card h3.related-item-title a {
            color: #343a40;
            text-decoration: none;
            border-bottom: none;
            transition: color 0.3s ease;
        }
        .related-card:hover h3.related-item-title a {
            color: #4c6ef5;
        }
        .related-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.78rem;
            color: #9099a3;
            line-height: 1;
            margin-top: 10px;
        }
        .related-meta .fa {
            margin-right: 3px;
            color: #b6bcc4;
        }
        .no-related-posts-tip {
            text-align: center;
            color: #6c757d;
            padding: 20px 0;
        }
        @media (max-width: 768px) {
            .related-posts-section {
                margin-top: 28px;
                padding-top: 18px;
            }
            .post-content h2.related-posts-title {
                font-size: 1rem;
                margin-bottom: 14px;
            }
            .related-posts-grid {
                gap: 10px;
            }
            .related-thumb {
                flex: 0 0 104px;
                width: 104px;
                min-height: 80px;
            }
            .related-body {
                padding: 10px 10px;
            }
            .related-card h3.related-item-title {
                font-size: 0.9rem;
            }
            .related-meta {
                font-size: 0.72rem;
                margin-top: 8px;
            }
        }

/* [ 文章详情 ] - 面包屑
-------------------------------------------------------------- */
.post-crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px;
    font-size: 0.875rem;
    line-height: 1.6;
    color: #868e96;
    background: #fff;
    border: 1px solid rgba(76, 110, 245, 0.12);
    border-left: 3px solid var(--primary);
    border-radius: 10px;
    padding: 9px 16px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.post-crumb .post-crumb-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #868e96;
    text-decoration: none;
    padding: 3px 8px;
    border-radius: 6px;
    transition: var(--transition);
}

.post-crumb .post-crumb-item i {
    font-size: 0.9em;
}

.post-crumb .post-crumb-item:hover {
    color: var(--primary);
    background: rgba(76, 110, 245, 0.08);
}

.post-crumb .post-crumb-sep {
    color: #ced4da;
    font-size: 0.95em;
    margin: 0 4px;
}

.post-crumb .post-crumb-current {
    display: inline-block;
    max-width: 560px;
    padding-left: 12px;
    margin-left: 4px;
    border-left: 1px solid #e9ecef;
    color: #343a40;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .post-crumb {
        padding: 8px 12px;
        font-size: 0.8rem;
        border-radius: 8px;
    }

    .post-crumb .post-crumb-item {
        padding: 2px 6px;
    }

    .post-crumb .post-crumb-sep {
        margin: 0 2px;
    }

    .post-crumb .post-crumb-current {
        max-width: 100%;
        padding-left: 10px;
        font-weight: 500;
    }
}