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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #ffffff;
            color: #1a1a2e;
            line-height: 1.6;
        }

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

        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== HEADER ========== */
        .header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .logo .mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(145deg, #0d9488, #0f766e);
            border-radius: 8px;
            color: #fff;
            font-size: 16px;
            font-weight: 900;
        }

        .logo .badge {
            font-size: 11px;
            font-weight: 500;
            color: #0d9488;
            background: rgba(13, 148, 136, 0.10);
            padding: 2px 10px;
            border-radius: 20px;
            margin-left: 4px;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav a {
            font-size: 14px;
            font-weight: 500;
            color: #334155;
            padding: 6px 16px;
            border-radius: 30px;
            transition: all 0.2s;
        }

        .nav a:hover {
            background: rgba(13, 148, 136, 0.06);
            color: #0d9488;
        }

        .nav a.active {
            color: #0d9488;
            background: rgba(13, 148, 136, 0.08);
        }

        .nav .btn-solid {
            background: #0d9488;
            color: #fff;
            padding: 6px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 13px;
            transition: all 0.25s;
            border: none;
        }

        .nav .btn-solid:hover {
            background: #0f766e;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(13, 148, 136, 0.3);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
        }

        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: #1a1a2e;
            border-radius: 4px;
            transition: 0.3s;
        }

        /* ========== 页面头部 ========== */
        .page-head {
            padding: 48px 0 40px;
            background: linear-gradient(170deg, #f8fafc 0%, #ffffff 100%);
            border-bottom: 1px solid #e2e8f0;
            text-align: center;
        }

        .page-head h1 {
            font-size: 38px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }

        .page-head .accent {
            color: #0d9488;
        }

        .page-head p {
            font-size: 17px;
            color: #64748b;
            max-width: 560px;
            margin: 0 auto 10px;
        }

        .page-head .sub {
            font-size: 14px;
            color: #94a3b8;
        }

        /* ========== 通用区块头部 ========== */
        .section-head {
            text-align: center;
            max-width: 600px;
            margin: 0 auto 44px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }

        .section-head .accent {
            color: #0d9488;
        }

        .section-head p {
            font-size: 16px;
            color: #64748b;
        }

        /* ========== 快速入门步骤 ========== */
        .quick-start {
            padding: 64px 0 56px;
            background: #ffffff;
        }

        .guide-steps {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .step-item {
            display: grid;
            grid-template-columns: 40px 1fr;
            gap: 18px;
            align-items: start;
            background: #f8fafc;
            border-radius: 16px;
            padding: 20px 24px;
            border: 1px solid #f1f5f9;
            transition: all 0.2s;
        }

        .step-item:hover {
            border-color: #d1fae5;
            background: #f0fdfa;
        }

        .step-dot {
            width: 36px;
            height: 36px;
            background: #0d9488;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
        }

        .step-content .step-title {
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .step-title .icon {
            font-size: 22px;
        }

        .step-desc {
            font-size: 15px;
            color: #475569;
            margin-bottom: 6px;
        }

        .step-link {
            display: inline-block;
            font-weight: 600;
            font-size: 14px;
            color: #0d9488;
            transition: color 0.2s;
        }

        .step-link:hover {
            color: #0f766e;
        }

        .step-hint {
            display: inline-block;
            font-size: 13px;
            color: #94a3b8;
            margin-top: 4px;
        }

        /* ========== 分平台教程 (折叠面板) ========== */
        .platform-tutorials {
            padding: 64px 0 72px;
            background: #fafdfc;
            border-top: 1px solid #e8f5f3;
        }

        .platform-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .platform-card {
            background: #ffffff;
            border-radius: 18px;
            border: 1px solid #e2e8f0;
            overflow: hidden;
            transition: all 0.25s;
        }

        .platform-card[open] {
            border-color: #99f6e4;
            box-shadow: 0 8px 30px rgba(13, 148, 136, 0.06);
        }

        .platform-summary {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 24px;
            cursor: pointer;
            list-style: none;
            user-select: none;
            transition: background 0.2s;
        }

        .platform-summary::-webkit-details-marker {
            display: none;
        }

        .platform-summary:hover {
            background: #f8fafc;
        }

        .platform-icon {
            font-size: 34px;
            flex-shrink: 0;
        }

        .platform-info h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
        }

        .platform-info p {
            font-size: 13px;
            color: #94a3b8;
        }

        .expand-icon {
            margin-left: auto;
            font-size: 12px;
            color: #94a3b8;
            transition: transform 0.2s;
        }

        .platform-card[open] .expand-icon {
            transform: rotate(180deg);
            color: #0d9488;
        }

        .platform-details {
            padding: 0 24px 24px 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            border-top: 1px solid #e8f5f3;
            margin-top: 8px;
            padding-top: 20px;
        }

        .detail-item {
            display: grid;
            grid-template-columns: 32px 1fr;
            gap: 14px;
            align-items: baseline;
        }

        .detail-num {
            width: 28px;
            height: 28px;
            background: rgba(13, 148, 136, 0.08);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: #0d9488;
        }

        .detail-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 4px;
        }

        .detail-item p {
            font-size: 14px;
            color: #64748b;
            line-height: 1.65;
        }

        .detail-item code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 13px;
            color: #0d9488;
        }

        /* ========== 专家优化 ========== */
        .pro-tips {
            padding: 64px 0 72px;
            background: #ffffff;
            border-top: 1px solid #e2e8f0;
        }

        .tips-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 960px;
            margin: 0 auto;
        }

        .tip-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 24px 18px;
            border: 1px solid #f1f5f9;
            text-align: center;
            transition: all 0.25s;
        }

        .tip-card:hover {
            border-color: #d1fae5;
            background: #f0fdfa;
            transform: translateY(-4px);
        }

        .tip-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }

        .tip-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }

        .tip-card p {
            font-size: 13px;
            color: #64748b;
            line-height: 1.6;
        }

        /* ========== 自检与验证 ========== */
        .self-check {
            padding: 64px 0 64px;
            background: #f8fafc;
            border-top: 1px solid #e2e8f0;
        }

        .check-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 900px;
            margin: 0 auto;
        }

        .check-item {
            background: #ffffff;
            border-radius: 16px;
            padding: 24px 20px;
            border: 1px solid #e2e8f0;
            text-align: center;
            transition: all 0.2s;
        }

        .check-item:hover {
            border-color: #99f6e4;
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(13, 148, 136, 0.04);
        }

        .check-icon {
            font-size: 36px;
            margin-bottom: 10px;
        }

        .check-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 10px;
        }

        .check-item p {
            font-size: 14px;
            color: #64748b;
            line-height: 1.65;
        }

        .check-cta {
            max-width: 600px;
            margin: 32px auto 0;
            text-align: center;
            background: #f0fdfa;
            border: 1px solid #99f6e4;
            border-radius: 50px;
            padding: 12px 24px;
            font-size: 14px;
            color: #0d9488;
            font-weight: 500;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 56px 0;
            background: #ffffff;
            border-top: 1px solid #e2e8f0;
        }

        .cta-box {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
            align-items: center;
            background: #f8fafc;
            border-radius: 24px;
            padding: 44px 48px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.02);
        }

        .cta-box .text h3 {
            font-size: 26px;
            font-weight: 800;
            color: #0f172a;
            margin-bottom: 6px;
        }

        .cta-box .text p {
            font-size: 16px;
            color: #64748b;
        }

        .cta-box .action {
            text-align: right;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #0d9488;
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.25s;
            border: none;
            box-shadow: 0 4px 20px rgba(13, 148, 136, 0.25);
            cursor: pointer;
        }

        .btn-primary:hover {
            background: #0f766e;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(13, 148, 136, 0.35);
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #0f172a;
            color: #e2e8f0;
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .logo {
            color: #ffffff;
            margin-bottom: 12px;
            font-size: 20px;
        }

        .footer-brand .logo .mark {
            background: linear-gradient(145deg, #0d9488, #0f766e);
        }

        .footer-brand p {
            font-size: 14px;
            color: #94a3b8;
            max-width: 260px;
            line-height: 1.7;
        }

        .footer-brand .social {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }

        .footer-brand .social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            font-size: 16px;
            transition: all 0.2s;
            color: #94a3b8;
        }

        .footer-brand .social a:hover {
            background: rgba(13, 148, 136, 0.2);
            color: #0d9488;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #f1f5f9;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul a {
            font-size: 14px;
            color: #94a3b8;
            transition: color 0.2s;
        }

        .footer-col ul a:hover {
            color: #ffffff;
        }

        .footer-col.address {
            font-size: 14px;
            color: #94a3b8;
            line-height: 1.8;
        }

        .footer-col.address .label {
            font-weight: 500;
            color: #e2e8f0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }

        .footer-bottom .links {
            display: flex;
            gap: 24px;
        }

        .footer-bottom .links a {
            color: #64748b;
            transition: color 0.2s;
            font-size: 13px;
        }

        .footer-bottom .links a:hover {
            color: #e2e8f0;
        }

        /* ========== 响应式设计 ========== */
        @media (max-width: 1024px) {
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .check-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-box {
                grid-template-columns: 1fr;
                text-align: center;
                padding: 36px 28px;
            }
            .cta-box .action {
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: #ffffff;
                padding: 20px 28px;
                gap: 12px;
                border-bottom: 1px solid #e2e8f0;
                box-shadow: 0 8px 32px rgba(0,0,0,0.06);
                align-items: stretch;
            }
            .nav.open { display: flex; }
            .nav a { padding: 10px 16px; text-align: center; }
            .nav .btn-solid { text-align: center; padding: 10px 16px; }
            .mobile-toggle { display: flex; }

            .page-head h1 { font-size: 28px; }
            .guide-steps { gap: 14px; }
            .step-item { padding: 16px 18px; }
            .platform-summary { padding: 16px 18px; }
            .platform-details { padding: 0 18px 20px; }
            .tips-grid { grid-template-columns: 1fr; }
            .check-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 480px) {
            .container { padding: 0 18px; }
            .page-head { padding: 32px 0 28px; }
            .page-head h1 { font-size: 24px; }
            .section-head h2 { font-size: 26px; }
            .platform-icon { font-size: 28px; }
            .platform-info h3 { font-size: 16px; }
            .detail-item { gap: 10px; }
            .cta-box { padding: 24px 18px; }
            .cta-box .text h3 { font-size: 20px; }
        }