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

        :root {
            --primary: #1a5cff;
            --primary-deep: #0b3fb5;
            --primary-dark: #0d47c4;
            --primary-light: #e8edff;
            --primary-glow: #4d82ff;
            --accent: #00c9a7;
            --accent-light: #e6faf6;
            --text-dark: #0a0e1a;
            --text-mid: #2d3348;
            --text-gray: #4a5068;
            --text-light: #8a92a8;
            --text-muted: #aab2c4;
            --bg-white: #ffffff;
            --bg-gray: #f6f8fc;
            --bg-dark: #080c1a;
            --border-color: #e2e8f0;
            --border-light: #eef1f7;
            --shadow: 0 4px 24px rgba(26, 92, 255, 0.10);
            --shadow-hover: 0 14px 52px rgba(26, 92, 255, 0.18);
            --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 24px 80px rgba(26, 92, 255, 0.14);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-dark);
            background: var(--bg-white);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-title {
            font-size: 2.3rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .section-title .accent-dot {
            color: var(--primary);
            display: inline-block;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-gray);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.30);
            letter-spacing: 0.01em;
            position: relative;
            overflow: hidden;
        }

        .btn-primary::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 60%);
            pointer-events: none;
            border-radius: 50px;
        }

        .btn-primary:hover {
            background: var(--primary-deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 36px rgba(26, 92, 255, 0.40);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-white);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: 50px;
            border: 1.5px solid var(--border-color);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 20px rgba(26, 92, 255, 0.10);
            background: #fafcff;
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.55);
            transition: var(--transition);
        }

        .navbar.scrolled {
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.07);
            background: rgba(255, 255, 255, 0.96);
        }

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            flex-shrink: 0;
            transition: var(--transition-fast);
        }

        .nav-logo:hover {
            color: var(--primary);
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            box-shadow: 0 2px 10px rgba(26, 92, 255, 0.25);
        }

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

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-gray);
            transition: var(--transition-fast);
            position: relative;
            padding: 4px 0;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-cta .btn-primary {
            padding: 10px 22px;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(26, 92, 255, 0.22);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }

        .nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: var(--transition);
        }

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

        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* 页面标题区 */
        .page-hero {
            padding: 150px 0 70px;
            background: linear-gradient(168deg, #f0f5ff 0%, #fafcff 35%, #ffffff 70%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(26, 92, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .page-hero .version-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 5px 22px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 14px;
            line-height: 1.2;
        }

        .page-hero h1 .highlight {
            color: var(--primary);
            position: relative;
        }

        .page-hero h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 8px;
            background: rgba(26, 92, 255, 0.12);
            border-radius: 4px;
            z-index: -1;
        }

        .page-hero .sub {
            font-size: 1.15rem;
            color: var(--text-gray);
            max-width: 640px;
            margin: 0 auto 16px;
            line-height: 1.9;
        }

        .page-hero .meta-info {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px 36px;
            margin-top: 18px;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .page-hero .meta-info span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* 三步极速上手（新增创意版块） */
        .quick-start {
            padding: 50px 0 70px;
            background: var(--bg-white);
        }

        .steps-horizontal {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 20px;
        }

        .qs-step {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 30px 25px;
            text-align: center;
            width: 240px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
        }

        .qs-step:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .qs-step .step-circle {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 16px;
            transition: var(--transition);
        }

        .qs-step:hover .step-circle {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 28px rgba(26, 92, 255, 0.30);
        }

        .qs-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .qs-step p {
            font-size: 0.9rem;
            color: var(--text-gray);
            line-height: 1.6;
        }

        .qs-step .time-badge {
            display: inline-block;
            margin-top: 12px;
            background: var(--accent-light);
            color: var(--accent);
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* 教程步骤详情区 */
        .tutorial-section {
            padding: 40px 0 70px;
            background: var(--bg-gray);
        }

        .tutorial-step {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 40px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .tutorial-step:last-of-type {
            border-bottom: none;
        }

        .tutorial-step.reverse {
            direction: rtl;
        }

        .tutorial-step.reverse>* {
            direction: ltr;
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 50%;
            margin-bottom: 12px;
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(26, 92, 255, 0.3);
        }

        .step-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .step-content p {
            color: var(--text-gray);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .step-content ul {
            list-style: none;
            padding: 0;
            margin: 12px 0 16px;
        }

        .step-content ul li {
            padding-left: 24px;
            position: relative;
            margin-bottom: 8px;
            color: var(--text-gray);
            font-size: 0.95rem;
        }

        .step-content ul li::before {
            content: '▹';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 600;
        }

        .step-content .code-tip {
            background: #fff;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            font-family: monospace;
            font-size: 0.85rem;
            color: var(--text-dark);
            border-left: 3px solid var(--primary);
            margin-top: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }

        .step-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .step-img {
            width: 100%;
            max-width: 400px;
            aspect-ratio: 4/3;
            border-radius: var(--radius-lg);
            background: linear-gradient(145deg, #e8edff, #d4deff);
            display: block;
            border: 1px solid rgba(26, 92, 255, 0.08);
            object-fit: cover;
            box-shadow: 0 12px 30px rgba(26, 92, 255, 0.10);
        }

        /* 视频教程版块（新增创意版块） */
        .video-tutorial {
            padding: 70px 0;
            background: var(--bg-white);
        }

        .video-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
            margin-top: 20px;
        }

        .video-card {
            background: var(--bg-gray);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }

        .video-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .video-thumb {
            aspect-ratio: 16/9;
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 2.2rem;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .video-thumb::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }

        .video-thumb:hover::after {
            background: rgba(0, 0, 0, 0.35);
        }

        .video-thumb .play-icon {
            position: relative;
            z-index: 1;
            width: 60px;
            height: 60px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(4px);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .video-card h4 {
            padding: 16px 16px 6px;
            font-weight: 700;
            font-size: 1rem;
        }

        .video-card p {
            padding: 0 16px 16px;
            font-size: 0.85rem;
            color: var(--text-gray);
        }

        /* 最佳实践 */
        .tips-section {
            background: var(--bg-gray);
            padding: 70px 0 80px;
        }

        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 28px;
            margin-top: 16px;
        }

        .tip-card {
            background: var(--bg-white);
            padding: 28px 22px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }

        .tip-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .tip-card .emoji {
            font-size: 2rem;
            display: block;
            margin-bottom: 10px;
        }

        .tip-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .tip-card p {
            font-size: 0.92rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* Footer */
        .footer {
            background: #0a0e1a;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-brand .logo .icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 340px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition-fast);
        }

        .footer-col ul li:hover {
            color: #fff;
        }

        .footer-col ul li a {
            color: inherit;
        }

        .footer-col .contact-item {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 6px;
        }

        .footer-col .contact-item strong {
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom .info-group {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-bottom .info-group span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .tutorial-step {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .tutorial-step.reverse {
                direction: ltr;
            }
            .step-content ul {
                text-align: left;
                max-width: 480px;
                margin: 12px auto 16px;
            }
            .step-number {
                margin: 0 auto 12px;
            }
            .footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .navbar .container {
                height: 64px;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 24px 32px 32px;
                gap: 20px;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
                transform: translateY(-120%);
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
                align-items: stretch;
                text-align: center;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                font-size: 1.05rem;
                padding: 8px 0;
            }
            .nav-cta .btn-primary {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .page-hero {
                padding: 120px 0 50px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero .sub {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .tutorial-step {
                padding: 28px 0;
            }
            .step-content h2 {
                font-size: 1.3rem;
            }
            .step-img {
                max-width: 100%;
            }
            .steps-horizontal {
                flex-direction: column;
                align-items: center;
            }
            .qs-step {
                width: 100%;
                max-width: 320px;
            }
            .video-grid {
                grid-template-columns: 1fr;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .footer .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .footer-bottom .info-group {
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero .meta-info {
                flex-direction: column;
                gap: 6px;
                align-items: center;
            }
            .container {
                padding: 0 16px;
            }
            .qs-step {
                padding: 20px 16px;
            }
        }