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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang TC", "PingFang HK", "Microsoft JhengHei", sans-serif;
            line-height: 1.8;
            color: #1f2937;
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1000px;
            margin: 0 auto;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
            padding: 100px 20px 80px;
            text-align: center;
        }

        .hero h1 {
            font-size: 60px;
            font-weight: 800;
            color: #1f2937;
            margin-bottom: 16px;
            line-height: 1.1;
            letter-spacing: -1px;
        }

        .hero-subtitle {
            font-size: 20px;
            color: #6b7280;
            margin-bottom: 50px;
            font-weight: 400;
        }

        .hero-image {
            margin: 50px auto;
            max-width: 700px;
        }

        .hero-image img {
            width: 100%;
            height: auto;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: #2563eb;
            color: white;
            padding: 16px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
            transition: all 0.2s ease;
            display: inline-block;
        }

        .btn-primary:hover {
            background: #1d4ed8;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: #10b981;
            padding: 14px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 17px;
            border: 2px solid #10b981;
            transition: all 0.2s ease;
            display: inline-block;
        }

        .btn-secondary:hover {
            background: #10b981;
            color: white;
            transform: translateY(-2px);
        }

        .hero-info {
            font-size: 16px;
            color: #6b7280;
            line-height: 1.6;
        }

        .hero-info strong {
            color: #2563eb;
            font-weight: 600;
        }

        /* Content Section */
        .content {
            padding: 80px 20px;
        }

        .section {
            margin-bottom: 80px;
        }

        .section-title {
            font-size: 40px;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 32px;
            letter-spacing: -0.5px;
        }

        .intro-text {
            font-size: 18px;
            line-height: 2;
            color: #374151;
            margin-bottom: 40px;
        }

        /* Cause Cards */
        .causes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }

        .cause-card {
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 16px;
            padding: 32px;
            transition: all 0.2s ease;
        }

        .cause-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            border-color: #2563eb;
        }

        .cause-number {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cause-title {
            font-size: 20px;
            font-weight: 600;
            color: #1f2937;
            margin-bottom: 12px;
        }

        .cause-description {
            font-size: 16px;
            line-height: 1.7;
            color: #6b7280;
        }

        /* Symptoms List */
        .symptoms-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 16px;
            margin-top: 32px;
        }

        .symptom-item {
            background: #f9fafb;
            padding: 20px 24px;
            border-radius: 12px;
            border-left: 4px solid #2563eb;
            font-size: 16px;
            color: #374151;
            transition: all 0.2s ease;
        }

        .symptom-item:hover {
            background: #f3f4f6;
            transform: translateX(4px);
        }

        /* Warning Box */
        .warning-box {
            background: #fef2f2;
            border-left: 4px solid #dc2626;
            border-radius: 12px;
            padding: 32px;
            margin: 40px 0;
        }

        .warning-box h3 {
            font-size: 24px;
            font-weight: 700;
            color: #dc2626;
            margin-bottom: 16px;
        }

        .warning-box p {
            font-size: 17px;
            line-height: 1.8;
            color: #991b1b;
            margin-bottom: 12px;
        }

        .warning-box ul {
            margin-left: 20px;
        }

        .warning-box li {
            font-size: 16px;
            line-height: 1.8;
            color: #991b1b;
            margin-bottom: 8px;
        }

        /* Info Box */
        .info-box {
            background: #eff6ff;
            border-left: 4px solid #2563eb;
            border-radius: 12px;
            padding: 32px;
            margin: 40px 0;
        }

        .info-box h3 {
            font-size: 22px;
            font-weight: 700;
            color: #1e40af;
            margin-bottom: 16px;
        }

        .info-box p {
            font-size: 16px;
            line-height: 1.8;
            color: #1e40af;
        }

        /* Tips Grid */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 32px;
        }

        .tip-card {
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 12px;
            padding: 24px;
            transition: all 0.2s ease;
        }

        .tip-card:hover {
            border-color: #10b981;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.1);
        }

        .tip-title {
            font-size: 18px;
            font-weight: 600;
            color: #10b981;
            margin-bottom: 8px;
        }

        .tip-description {
            font-size: 15px;
            line-height: 1.7;
            color: #6b7280;
        }

        /* FAQ Section */
        .faq-section {
            background: #f9fafb;
            padding: 80px 20px;
        }

        .faq-title {
            font-size: 40px;
            font-weight: 700;
            color: #1f2937;
            text-align: center;
            margin-bottom: 50px;
        }

        .faq-item {
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.2s ease;
        }

        .faq-item:hover {
            border-color: #2563eb;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
        }

        .faq-question {
            background: #f9fafb;
            padding: 24px 28px;
            font-size: 18px;
            font-weight: 600;
            color: #1f2937;
        }

        .faq-answer {
            padding: 24px 28px;
            font-size: 16px;
            line-height: 1.9;
            color: #4b5563;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
            padding: 80px 20px;
            text-align: center;
            color: white;
        }

        .cta-section h2 {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .btn-white {
            background: white;
            color: #2563eb;
            padding: 16px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            transition: all 0.2s ease;
            display: inline-block;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
        }

        .btn-green {
            background: #10b981;
            color: white;
            padding: 16px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
            transition: all 0.2s ease;
            display: inline-block;
        }

        .btn-green:hover {
            background: #059669;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
        }

        .cta-info {
            font-size: 16px;
            opacity: 0.9;
        }

        /* Responsive - 完整移動端優化 */
        @media (max-width: 768px) {
            /* Hero Section */
            .hero {
                padding: 60px 20px 50px;
            }

            .hero h1 {
                font-size: 36px;
                margin-bottom: 12px;
            }

            .hero-subtitle {
                font-size: 17px;
                margin-bottom: 30px;
            }

            .hero-image {
                margin: 30px auto;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
                margin-bottom: 30px;
            }

            .hero-info {
                font-size: 15px;
            }

            /* Content Section */
            .content {
                padding: 40px 20px;
            }

            .section {
                margin-bottom: 50px;
            }

            .section-title {
                font-size: 32px;
                margin-bottom: 24px;
            }

            .intro-text {
                font-size: 17px;
                margin-bottom: 32px;
            }

            /* Buttons */
            .btn-primary,
            .btn-secondary,
            .btn-white,
            .btn-green {
                width: 100%;
                max-width: 320px;
                padding: 14px 28px;
                font-size: 16px;
            }

            /* Cards */
            .causes-grid,
            .symptoms-list,
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cause-card {
                padding: 24px;
            }

            .cause-number {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }

            .cause-title {
                font-size: 18px;
            }

            .cause-description {
                font-size: 15px;
            }

            .tip-card {
                padding: 20px;
            }

            .tip-title {
                font-size: 17px;
            }

            .tip-description {
                font-size: 14px;
            }

            /* Info / Warning Boxes */
            .info-box,
            .warning-box {
                padding: 24px;
                margin: 32px 0;
            }

            .info-box h3,
            .warning-box h3 {
                font-size: 20px;
                margin-bottom: 12px;
            }

            .info-box p,
            .warning-box p {
                font-size: 15px;
            }

            .warning-box li {
                font-size: 15px;
            }

            /* Symptoms */
            .symptom-item {
                padding: 16px 20px;
                font-size: 15px;
            }

            /* FAQ Section */
            .faq-section {
                padding: 60px 20px;
            }

            .faq-title {
                font-size: 32px;
                margin-bottom: 40px;
            }

            .faq-question {
                padding: 20px 24px;
                font-size: 17px;
            }

            .faq-answer {
                padding: 20px 24px;
                font-size: 15px;
            }

            /* CTA Section */
            .cta-section {
                padding: 60px 20px;
            }

            .cta-section h2 {
                font-size: 32px;
                margin-bottom: 12px;
            }

            .cta-section p {
                font-size: 17px;
                margin-bottom: 32px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
                margin-bottom: 32px;
            }

            .cta-info {
                font-size: 15px;
            }
        }

        /* 超小屏幕優化 (iPhone SE等) */
        @media (max-width: 375px) {
            .hero h1 {
                font-size: 32px;
            }

            .section-title,
            .faq-title,
            .cta-section h2 {
                font-size: 28px;
            }

            .cause-card,
            .info-box,
            .warning-box {
                padding: 20px;
            }
        }