* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            outline: none !important;
            -webkit-tap-highlight-color: transparent !important;
        }

        body {
            background-color: #f0f4f8;
            min-height: 100vh;
            padding: 20px;
            line-height: 1.6;
        }

        .container {
            max-width: 800px;
            margin: 30px auto;
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.06);
            padding: 32px;
        }

        .header {
            text-align: center;
            margin-bottom: 28px;
            padding-bottom: 16px;
            border-bottom: 1px solid #e5e6eb;
        }

        .header h1 {
            font-size: 24px;
            color: #1d2129;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .header p {
            font-size: 15px;
            color: #86909c;
        }

        .section {
            margin-bottom: 28px;
        }

        .section h2 {
            font-size: 19px;
            color: #1d2129;
            margin-bottom: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
        }

        .section h2::before {
            content: "";
            width: 6px;
            height: 20px;
            background-color: #165DFF;
            border-radius: 3px;
            margin-right: 10px;
        }

        .section p,
        .section li {
            font-size: 15px;
            color: #4e5969;
            margin-bottom: 8px;
        }

        .section ul {
            margin-left: 20px;
        }

        .tip-box {
            padding: 12px 14px;
            border-radius: 8px;
            margin: 14px 0;
            font-size: 15px;
            display: flex;
            align-items: flex-start;
            line-height: 1.4;
        }

        .tip-box svg {
            margin-right: 8px;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .tip-box.warning {
            background: #fef7e0;
            border-left: 3px solid #ff7d00;
            color: #856404;
        }

        .tip-box.success {
            background: #e6f7ee;
            border-left: 3px solid #007d49;
            color: #005e35;
        }

        .tip-box.danger {
            background: #fee7e6;
            border-left: 3px solid #c92a2a;
            color: #721c24;
        }

        .steps {
            list-style: none;
            counter-reset: step;
            margin-left: 0;
        }

        .steps li {
            position: relative;
            padding-left: 40px;
            margin-bottom: 24px;
        }

        .steps li::before {
            content: counter(step);
            counter-increment: step;
            position: absolute;
            left: 0;
            top: 0;
            width: 28px;
            height: 28px;
            background-color: #165DFF;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 500;
            font-size: 14px;
        }

        .step-img {
            margin-top: 10px;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid #e5e6eb;
        }

        .step-img img {
            width: 100%;
            height: auto;
            display: block;
        }

        .step-img-caption {
            padding: 8px 12px;
            background: #f7f8fa;
            font-size: 14px;
            color: #86909c;
            text-align: center;
        }

        .faq-item {
            border: 1px solid #e5e6eb;
            border-radius: 8px;
            margin-bottom: 10px;
            overflow: hidden;
        }

        .faq-question {
            padding: 14px;
            background: #f7f8fa;
            font-weight: 500;
            color: #1d2129;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 15px;
        }

        .faq-answer {
            padding: 0 14px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-answer.show {
            padding: 14px;
            max-height: 600px;
        }

        .faq-icon {
            color: #165DFF;
            transition: transform 0.3s;
        }

        .faq-icon.rotate {
            transform: rotate(180deg);
        }

        .back-btn {
            background-color: #165DFF;
            color: #fff;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 500;
            cursor: pointer;
            font-size: 15px;
            transition: background 0.2s;
            text-decoration: none;
            display: inline-block;
        }

        .back-btn:hover {
            background-color: #0E42D2;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
            }
            .header h1 {
                font-size: 21px;
            }
            .tip-box {
                align-items: center;
                flex-wrap: nowrap;
                gap: 8px;
                word-break: normal;
            }
            .tip-box svg {
                margin-top: 0;
            }
        }