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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, sans-serif;
            background: #fefefe;
            color: #11181c;
            line-height: 1.55;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* 导航风格 - 与首页一致 */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .header-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            flex-wrap: wrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .brand-logo-img {
            width: 38px;
            height: 38px;
            object-fit: contain;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 1.55rem;
            font-weight: 700;
            letter-spacing: -0.4px;
            color: #0c4e6e;
            white-space: nowrap;
        }
        .brand-name span {
            font-weight: 400;
            color: #5a7d8c;
            font-size: 0.85rem;
            letter-spacing: 0;
            margin-left: 2px;
        }
        .nav-links-new {
            display: flex;
            gap: 24px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links-new a {
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            color: #2c3e50;
            transition: color 0.2s, transform 0.15s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-new a:hover,
        .nav-links-new a.active {
            color: #1f7b8c;
        }
        .nav-links-new a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: #1f7b8c;
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-links-new a:hover::after,
        .nav-links-new a.active::after {
            width: 100%;
        }
        .btn-ghost {
            border: 1px solid #cbd5e1;
            padding: 7px 20px;
            border-radius: 100px;
            background: transparent;
            font-weight: 500;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.2s;
            text-decoration: none;
            color: #2c3e50;
            white-space: nowrap;
        }
        .btn-ghost:hover {
            border-color: #1f7b8c;
            color: #1f7b8c;
            background: #f0faf9;
        }

        /* 页面标题 */
        .page-hero {
            padding: 48px 0 28px;
            text-align: center;
            background: #ffffff;
        }
        .page-hero h1 {
            font-size: 2.7rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #134e6f 0%, #1e6b5e 60%, #2a7f6e 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 10px;
        }
        .page-hero .page-sub {
            color: #3e5a6c;
            font-size: 1.1rem;
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.5;
        }

        /* 教程目录 */
        .toc-section {
            padding: 30px 0 40px;
            background: #ffffff;
        }
        .toc-wrapper {
            background: #f9fbfd;
            border: 1px solid #e8eef3;
            border-radius: 28px;
            padding: 30px 32px;
            max-width: 850px;
            margin: 0 auto;
        }
        .toc-wrapper h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #1a3c4a;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .toc-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 10px;
            list-style: none;
            padding: 0;
        }
        .toc-list li a {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            color: #2c3e50;
            font-weight: 500;
            font-size: 0.93rem;
            padding: 10px 14px;
            border-radius: 12px;
            transition: all 0.2s;
            background: #ffffff;
            border: 1px solid transparent;
        }
        .toc-list li a:hover {
            border-color: #c0dfd9;
            color: #1f7b8c;
            background: #f6fbfa;
            transform: translateX(3px);
        }
        .toc-num {
            background: #e6f7f5;
            color: #0f6e6a;
            border-radius: 50%;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.82rem;
            flex-shrink: 0;
        }

        /* 教程内容区 */
        .tutorial-content {
            padding: 20px 0 60px;
            background: #f9fbfd;
        }
        .tutorial-article {
            max-width: 880px;
            margin: 0 auto;
        }
        .step-block {
            background: #ffffff;
            border-radius: 28px;
            padding: 36px 32px;
            margin-bottom: 32px;
            border: 1px solid #e8eef3;
            transition: box-shadow 0.25s;
            scroll-margin-top: 100px;
        }
        .step-block:hover {
            box-shadow: 0 8px 28px -12px rgba(0, 0, 0, 0.06);
        }
        .step-block h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: #1a3c4a;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .step-badge {
            background: linear-gradient(135deg, #134e6f, #1e6b5e);
            color: #fff;
            border-radius: 14px;
            padding: 5px 14px;
            font-size: 0.82rem;
            font-weight: 700;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .step-block h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #1a3c4a;
            margin: 20px 0 8px;
        }
        .step-block p {
            font-size: 0.96rem;
            color: #3e5a6c;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .step-block ul,
        .step-block ol {
            margin: 8px 0 16px 20px;
            color: #3e5a6c;
            font-size: 0.94rem;
            line-height: 1.7;
        }
        .step-block li {
            margin-bottom: 6px;
        }
        .step-block code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.88rem;
            color: #1a4d55;
            font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
        }
        .highlight-box {
            background: #f6faf9;
            border-left: 4px solid #1f7b8c;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 18px 0;
            font-weight: 500;
            color: #1a4d55;
            font-size: 0.93rem;
        }
        .tip-box {
            background: #fffdf5;
            border: 1px solid #f0e4b0;
            padding: 14px 18px;
            border-radius: 14px;
            margin: 18px 0;
            font-size: 0.9rem;
            color: #5c4a1f;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .tip-box .tip-icon {
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        /* 内链提示卡片 */
        .crosslink-card {
            background: #f0faf8;
            border: 1px solid #c0dfd9;
            border-radius: 18px;
            padding: 16px 20px;
            margin-top: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            text-decoration: none;
            color: #1a3c4a;
            transition: all 0.25s;
            font-weight: 500;
            font-size: 0.92rem;
        }
        .crosslink-card:hover {
            background: #e6f7f3;
            border-color: #1f7b8c;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px -8px rgba(15, 110, 106, 0.18);
        }
        .crosslink-emoji {
            font-size: 1.6rem;
            flex-shrink: 0;
        }
        .crosslink-arrow {
            margin-left: auto;
            color: #1f7b8c;
            font-weight: 700;
            white-space: nowrap;
        }

        /* 规则对比表格 */
        .rule-table-wrap {
            overflow-x: auto;
            margin: 16px 0;
        }
        .rule-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 500px;
        }
        .rule-table th {
            background: #f1f5f9;
            padding: 10px 14px;
            text-align: left;
            font-weight: 700;
            color: #1a3c4a;
            border-radius: 8px 8px 0 0;
        }
        .rule-table td {
            padding: 10px 14px;
            border-bottom: 1px solid #e8edf2;
            color: #3e5a6c;
        }
        .rule-table tr:hover td {
            background: #fafcfd;
        }

        /* 页脚 - 与首页一致 */
        .footer-alt {
            background: #f1f5f9;
            border-top: none;
            padding: 44px 0 32px;
            font-size: 0.9rem;
            color: #5c7380;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-col h5 {
            font-weight: 700;
            color: #1a3c4a;
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        .footer-col a {
            display: block;
            color: #5c7380;
            text-decoration: none;
            margin-bottom: 6px;
            transition: color 0.2s;
            font-size: 0.88rem;
        }
        .footer-col a:hover {
            color: #1f7b8c;
        }
        .footer-bottom {
            text-align: center;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid #dde4ea;
            font-size: 0.82rem;
            color: #8a9ba7;
        }

        @media (max-width: 780px) {
            .container {
                padding: 0 20px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .step-block {
                padding: 24px 18px;
                border-radius: 22px;
            }
            .step-block h2 {
                font-size: 1.25rem;
                flex-wrap: wrap;
            }
            .toc-list {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }
            .toc-list li a {
                font-size: 0.82rem;
                padding: 8px 10px;
            }
            .toc-wrapper {
                padding: 20px 18px;
            }
            .nav-links-new {
                gap: 12px;
            }
            .nav-links-new a {
                font-size: 0.85rem;
            }
            .brand-name {
                font-size: 1.3rem;
            }
            .brand-name span {
                display: none;
            }
            .crosslink-card {
                font-size: 0.85rem;
                padding: 12px 14px;
            }
            .rule-table {
                font-size: 0.78rem;
            }
        }
        @media (max-width: 480px) {
            .toc-list {
                grid-template-columns: 1fr;
            }
            .step-block {
                padding: 18px 14px;
                border-radius: 18px;
            }
            .header-flex {
                gap: 10px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .step-block h2 {
                font-size: 1.1rem;
            }
            .step-block p {
                font-size: 0.88rem;
            }
        }