/* ========================================
           GLOBAL RESET & VARIABLES (与主站完全一致)
        ======================================== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-blue: #2a7de1;
            --primary-deep: #1a5bbf;
            --primary-bright: #5b9cf5;
            --primary-glow: rgba(42, 125, 225, 0.25);
            --primary-soft-bg: rgba(42, 125, 225, 0.08);

            --bg-body: #f4f8fe;
            --bg-surface: #ffffff;
            --bg-hero: linear-gradient(135deg, #eaf2fc 0%, #ffffff 100%);
            --bg-footer: #eaf2fc;

            --text-primary: #0b1a30;
            --text-secondary: #2c3e5a;
            --text-muted: #5e6f8a;
            --text-inverse: #ffffff;

            --border-color: #dce5f0;
            --shadow-sm: 0 8px 20px rgba(0, 20, 50, 0.06);
            --shadow-md: 0 12px 30px rgba(0, 20, 50, 0.10);
            --shadow-hover: 0 16px 40px rgba(42, 125, 225, 0.15);

            --font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
            --radius-card: 24px;
            --radius-btn: 60px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

            --scrollbar-track: #dce5f0;
            --scrollbar-thumb: #b0c4de;
        }

        /* 暗色模式 */
        @media (prefers-color-scheme: dark) {
            :root {
                --bg-body: #0f172a;
                --bg-surface: #1e293b;
                --bg-hero: linear-gradient(135deg, #131e3a 0%, #1e293b 100%);
                --bg-footer: #131e3a;
                --text-primary: #f1f5f9;
                --text-secondary: #cbd5e1;
                --text-muted: #94a3b8;
                --border-color: #334155;
                --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.4);
                --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.5);
                --shadow-hover: 0 16px 40px rgba(42, 125, 225, 0.25);
                --primary-soft-bg: rgba(42, 125, 225, 0.15);
                --scrollbar-track: #1e293b;
                --scrollbar-thumb: #475569;
            }
            .step-card,
            .download-box,
            .faq-item,
            .tip-box {
                background: #1e293b !important;
            }
            .header {
                background-color: rgba(15, 23, 42, 0.92) !important;
                border-bottom-color: #334155 !important;
            }
            .nav-menu {
                background-color: #1e293b !important;
            }
            .logo-text {
                background: linear-gradient(135deg, #f1f5f9 0%, var(--primary-bright) 100%);
                background-clip: text;
                -webkit-background-clip: text;
            }
            .hero-title {
                background: linear-gradient(135deg, #f1f5f9, var(--primary-bright));
                background-clip: text;
                -webkit-background-clip: text;
            }
            .breadcrumb a {
                color: #94a3b8;
            }
            .breadcrumb a:hover {
                color: var(--primary-bright);
            }
            .breadcrumb .current {
                color: #cbd5e1;
            }
        }

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            transition: background-color 0.3s, color 0.3s;
            -webkit-font-smoothing: antialiased;
        }

        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--scrollbar-track);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--scrollbar-thumb);
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-blue);
        }

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

        /* ===== HEADER (与主站完全一致) ===== */
        .header {
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s, border-color 0.3s;
            min-height: 64px;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 64px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-icon {
            color: var(--primary-blue);
            font-size: 26px;
            filter: drop-shadow(0 0 6px var(--primary-glow));
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            background: linear-gradient(135deg, #0b1a30 0%, var(--primary-blue) 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            white-space: nowrap;
        }
        .logo-text span {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-bright));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
            padding: 6px 0;
            position: relative;
            letter-spacing: 0.2px;
        }

        .nav-menu a:hover {
            color: var(--primary-blue);
        }
        .nav-menu .active {
            color: var(--primary-blue);
        }
        .nav-menu .active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary-blue);
            border-radius: 4px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 10px 8px;
            margin-right: -8px;
            border-radius: 12px;
            transition: background 0.2s;
            min-width: 48px;
            min-height: 48px;
            justify-content: center;
            align-items: center;
        }
        .mobile-menu-btn:active {
            background: var(--primary-soft-bg);
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: linear-gradient(105deg, var(--primary-blue), var(--primary-deep));
            color: #fff;
            text-decoration: none;
            padding: 14px 34px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(42, 125, 225, 0.25);
            min-height: 52px;
            min-width: 48px;
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            background: linear-gradient(105deg, var(--primary-deep), var(--primary-blue));
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 24px rgba(42, 125, 225, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.96);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary-blue);
            border: 2px solid var(--primary-blue);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--primary-blue);
            color: #fff;
        }

        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            color: var(--text-primary);
            margin-bottom: 32px;
            text-align: center;
            font-weight: 600;
            position: relative;
        }
        .section-title:after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-blue), transparent);
            margin: 12px auto 0;
            border-radius: 4px;
        }

        /* ===== 面包屑导航 ===== */
        .breadcrumb {
            padding: 16px 0 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary-blue);
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== HERO ===== */
        .hero-tutorial {
            background: var(--bg-hero);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin: 12px 0 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: background 0.3s, border-color 0.3s;
        }
        .hero-tutorial .hero-tag {
            display: inline-block;
            background: var(--primary-soft-bg);
            color: var(--primary-blue);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .hero-tutorial h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            background: linear-gradient(135deg, #0b1a30, var(--primary-blue));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 12px;
            line-height: 1.2;
            font-weight: 700;
        }
        .hero-tutorial p {
            font-size: clamp(1rem, 1.1vw, 1.15rem);
            color: var(--text-secondary);
            max-width: 700px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 16px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .hero-meta i {
            margin-right: 6px;
            color: var(--primary-blue);
        }

        /* ===== 教程步骤 ===== */
        .tutorial-steps {
            display: flex;
            flex-direction: column;
            gap: 28px;
            margin-bottom: 40px;
        }

        .step-card {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .step-card:hover {
            border-color: var(--primary-blue);
            box-shadow: var(--shadow-md);
        }

        .step-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
        }
        .step-number {
            background: var(--primary-blue);
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .step-header h2 {
            font-size: 1.4rem;
            color: var(--text-primary);
            font-weight: 600;
        }

        .step-body {
            color: var(--text-secondary);
            padding-left: 60px;
        }
        .step-body p {
            margin-bottom: 10px;
        }
        .step-body ul,
        .step-body ol {
            padding-left: 20px;
            margin-bottom: 12px;
        }
        .step-body li {
            margin-bottom: 6px;
        }
        .step-body .highlight {
            background: var(--primary-soft-bg);
            padding: 2px 10px;
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            color: var(--primary-blue);
            border: 1px solid rgba(42, 125, 225, 0.15);
        }
        .step-body .success-msg {
            background: rgba(42, 125, 225, 0.08);
            border-left: 4px solid var(--primary-blue);
            padding: 12px 18px;
            border-radius: 0 12px 12px 0;
            margin: 12px 0;
            font-weight: 500;
            color: var(--primary-blue);
        }
        .step-body .warning-msg {
            background: rgba(230, 126, 34, 0.08);
            border-left: 4px solid #e67e22;
            padding: 12px 18px;
            border-radius: 0 12px 12px 0;
            margin: 12px 0;
            color: #b85e0a;
        }
        .step-body .warning-msg i {
            color: #e67e22;
            margin-right: 8px;
        }
        .step-body code {
            background: var(--primary-soft-bg);
            padding: 2px 10px;
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            color: var(--primary-blue);
        }

        /* ===== 新增：教程图片样式 (居中、自适应、圆角、阴影) ===== */
        .tutorial-img {
            display: block;
            max-width: 100%;
            height: auto;
            margin: 16px auto;
            border-radius: 16px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--border-color);
            transition: box-shadow 0.3s, border-color 0.3s;
        }
        .tutorial-img:hover {
            box-shadow: 0 8px 28px rgba(42, 125, 225, 0.12);
            border-color: var(--primary-blue);
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: -4px;
            margin-bottom: 12px;
        }

        /* ===== 下载地址区域 ===== */
        .download-box {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            margin-bottom: 32px;
            border: 2px solid var(--primary-blue);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .download-box:hover {
            box-shadow: var(--shadow-hover);
        }
        .download-box .box-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .download-box .box-title i {
            color: var(--primary-blue);
        }
        .download-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            background: var(--bg-body);
            padding: 16px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }
        .download-row .label {
            font-weight: 600;
            color: var(--text-secondary);
            min-width: 80px;
        }
        .download-row .url {
            color: var(--primary-blue);
            word-break: break-all;
            font-size: 0.95rem;
            flex: 1;
        }
        .download-row .url a {
            color: var(--primary-blue);
            text-decoration: none;
        }
        .download-row .url a:hover {
            text-decoration: underline;
        }
        .download-row .extract {
            background: var(--primary-soft-bg);
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 600;
            color: var(--primary-blue);
            font-size: 0.9rem;
        }
        .version-table {
            width: 100%;
            border-collapse: collapse;
            margin: 12px 0 8px;
            font-size: 0.95rem;
        }
        .version-table th,
        .version-table td {
            padding: 10px 16px;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        .version-table th {
            background: var(--primary-soft-bg);
            font-weight: 600;
            color: var(--text-primary);
        }
        .version-table td {
            color: var(--text-secondary);
        }

        /* ===== 常见问题 ===== */
        .faq-section {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color 0.2s;
        }
        .faq-item:hover {
            border-color: var(--primary-blue);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            text-align: left;
            transition: background 0.2s;
            font-family: var(--font-family);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--primary-soft-bg);
        }
        .faq-question i {
            color: var(--primary-blue);
            transition: transform 0.3s;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 24px 24px;
        }

        /* ===== 温馨提示 ===== */
        .tip-box {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            margin-bottom: 32px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .tip-box .tip-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .tip-box .tip-title i {
            color: #e67e22;
        }
        .tip-box ul {
            padding-left: 24px;
            color: var(--text-secondary);
        }
        .tip-box ul li {
            margin-bottom: 6px;
        }

        /* ===== 返回链接 ===== */
        .back-link {
            text-align: center;
            margin: 32px 0 16px;
        }
        .back-link a {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
        }
        .back-link a:hover {
            text-decoration: underline;
            color: var(--primary-deep);
        }

        /* ===== FOOTER ===== */
        .footer {
            background-color: var(--bg-footer);
            color: var(--text-secondary);
            padding: 40px 0 20px;
            margin-top: 40px;
            border-top: 1px solid var(--border-color);
            transition: background 0.3s, border-color 0.3s;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-column h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--primary-blue);
            font-weight: 600;
        }
        .footer-column ul {
            list-style: none;
        }
        .footer-column ul li {
            margin-bottom: 8px;
        }
        .footer-column ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
            font-size: 0.92rem;
        }
        .footer-column ul li a:hover {
            color: var(--primary-blue);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(42, 125, 225, 0.15);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ========================================
           RESPONSIVE (与主站一致)
        ======================================== */
        @media (max-width: 992px) {
            .hero-tutorial {
                text-align: center;
                padding: 32px 24px;
            }
            .hero-tutorial p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-meta {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .nav-container {
                height: 60px;
                padding: 0 12px;
            }
            .logo-text {
                font-size: 19px;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: var(--bg-surface);
                padding: 20px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                border-bottom: 1px solid var(--border-color);
                gap: 8px;
                z-index: 999;
                transition: background 0.3s;
            }
            .nav-menu.show {
                display: flex;
                animation: slideDown 0.25s ease forwards;
            }
            @keyframes slideDown {
                0% { opacity: 0; transform: translateY(-8px); }
                100% { opacity: 1; transform: translateY(0); }
            }
            .nav-menu a {
                padding: 12px 16px;
                border-radius: 12px;
                font-size: 1rem;
                width: 100%;
            }
            .nav-menu a:active {
                background: var(--primary-soft-bg);
            }
            .nav-menu .active::after {
                display: none;
            }
            .nav-menu .active {
                background: var(--primary-soft-bg);
                color: var(--primary-blue);
                border-radius: 12px;
            }

            .container {
                padding: 0 12px;
            }

            .hero-tutorial {
                padding: 24px 16px;
                margin: 8px 0 24px;
                border-radius: 20px;
            }
            .hero-tutorial h1 {
                font-size: 1.6rem;
            }

            .step-card {
                padding: 24px 16px;
                border-radius: 20px;
            }
            .step-body {
                padding-left: 0;
                margin-top: 12px;
            }
            .step-header h2 {
                font-size: 1.2rem;
            }
            .step-number {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }

            .download-box {
                padding: 24px 16px;
                border-radius: 20px;
            }
            .download-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .download-row .url {
                font-size: 0.85rem;
            }
            .version-table {
                font-size: 0.85rem;
            }
            .version-table th,
            .version-table td {
                padding: 6px 10px;
            }

            .faq-section {
                padding: 28px 16px;
                border-radius: 20px;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 0.9rem;
            }

            .tip-box {
                padding: 20px 16px;
                border-radius: 20px;
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
                padding: 0 12px;
            }
            .btn-primary {
                padding: 12px 24px;
                font-size: 0.95rem;
                min-height: 48px;
                width: 100%;
                max-width: 320px;
            }

            /* 移动端图片自适应 */
            .tutorial-img {
                max-width: 100%;
                margin: 12px auto;
            }
        }

        @media (max-width: 420px) {
            .logo-text {
                font-size: 17px;
            }
            .hero-tutorial h1 {
                font-size: 1.4rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            .download-row .label {
                min-width: 60px;
                font-size: 0.85rem;
            }
        }