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

        body {
            font-family: "Open Sans", "Microsoft JhengHei", "微軟正黑體", sans-serif;
            background-color: #EF5100;
            color: #222222;
            min-height: 100vh;
        }

        /* ========== Decorative Elements ========== */
        .decorative-circles {
            position: fixed;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            pointer-events: none;
            overflow: visible;
            z-index: 1;
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            25% { transform: translate(-30px, 30px) rotate(90deg); }
            50% { transform: translate(-50px, 0) rotate(180deg); }
            75% { transform: translate(-30px, -30px) rotate(270deg); }
        }

        .circle {
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.3);
            animation: pulse 4s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 0.3; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.05); }
        }

        .circle-1 { width: 400px; height: 400px; top: 0; right: 0; animation-delay: 0s; }
        .circle-2 { width: 320px; height: 320px; top: 40px; right: 40px; animation-delay: 0.5s; }
        .circle-3 { width: 240px; height: 240px; top: 80px; right: 80px; animation-delay: 1s; }

        /* ========== Layout Components ========== */
        .header {
            background-color: transparent;
            padding: 20px 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo img {
            height: 40px;
            width: auto;
        }

        .main-container {
            background-color: #FFFFFF;
            margin: 20px auto;
            border-radius: 20px;
            padding: 60px 40px;
            max-width: 900px;
        }

        /* ========== Error State ========== */
        .error-section {
            display: none;
            text-align: center;
            padding: 60px 20px;
        }

        .error-section.active {
            display: block;
        }

        .error-icon {
            font-size: 64px;
            margin-bottom: 30px;
        }

        .error-title {
            font-size: 28px;
            font-weight: 700;
            color: #222222;
            margin-bottom: 20px;
        }

        .error-message {
            font-size: 16px;
            color: #555555;
            margin-bottom: 30px;
            line-height: 1.6;
            font-weight: 600;
        }

        .error-action-btn {
            background-color: #EF5100;
            color: #FFFFFF;
            padding: 12px 30px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: bold;
            text-decoration: none;
            display: inline-block;
            margin: 0 10px;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .error-action-btn:hover {
            background-color: #D44400;
            transform: translateY(-2px);
        }

        /* ========== Steps Progress (Updated) ========== */
        .steps-section {
            margin-bottom: 50px;
        }

        .steps-container {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .step-progress-line {
            position: absolute;
            top: 20px;
            height: 1px;
            background-color: #E0E0E0;
            width: 520px;
            z-index: 0;
        }

        .steps-wrapper {
            display: flex;
            justify-content: space-between;
            width: 600px;
            position: relative;
            z-index: 1;
        }

        .step-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 16px;
            background-color: #E0E0E0;
            color: #999999;
        }

        .step-item.active .step-number {
            background-color: #4CAF50;
            color: #FFFFFF;
        }

        .step-item.current .step-number {
            background-color: #EF5100;
            color: #FFFFFF;
        }

        .step-label {
            font-size: 14px;
            color: #999999;
            text-align: center;
            font-weight: 600;
        }

        .step-item.active .step-label { 
            color: #4CAF50; 
        }
        
        .step-item.current .step-label { 
            color: #EF5100; 
        }

        /* ========== Welcome Section ========== */
        .welcome-section {
            text-align: center;
            margin-bottom: 50px;
        }

        .welcome-icon {
            font-size: 48px;
            margin-bottom: 20px;
        }

        .welcome-title {
            font-size: 40px;
            font-weight: 700;
            color: #222222;
            margin-bottom: 15px;
        }

        .member-info {
            font-size: 20px;
            color: #222222;
            font-weight: 700;
            margin-bottom: 60px;
        }

        .member-info .family-name,
        .member-info .member-number {
            color: #EF5100;
            font-weight: 600;
        }

        .description-text {
            font-size: 16px;
            line-height: 1.8;
            color: #555555;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .highlight-text {
            color: #EF5100;
            font-weight: 600;
        }

        .sub-description {
            font-size: 15px;
            color: #555555;
            line-height: 1.6;
            margin: 20px 0;
            font-weight: 600;
        }

        .apply-section {
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
            color: #AAAAAA;
            font-size: 15px;
            line-height: 1.6;
            font-weight: 600;
        }

        .apply-link {
            color: #555555;
            text-decoration: underline;
            cursor: pointer;
            font-weight: 600;
        }

        .apply-link:hover {
            color: #AAAAAA;
        }

        /* ========== Arrow Divider ========== */
        .arrow-divider {
            text-align: center;
            margin: 40px 0;
            color: #EF5100;
            font-size: 24px;
        }

        /* ========== Form Styles ========== */
        .verification-section {
            background-color: #FFFFFF;
            border: 1px solid #E0E0E0;
            border-radius: 12px;
            padding: 40px;
            max-width: 500px;
            margin: 0 auto;
        }

        .section-title {
            font-size: 20px;
            font-weight: 700;
            color: #222222;
            margin-bottom: 30px;
            text-align: start;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: #222222;
            margin-bottom: 8px;
            display: block;
        }

        .input-group {
            display: flex;
            gap: 10px;
        }

        .form-input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #E0E0E0;
            border-radius: 8px;
            font-size: 16px;
            font-family: inherit;
            transition: all 0.3s;
        }

        .form-input:focus {
            outline: none;
            border-color: #EF5100;
            background-color: #FFF5F0;
        }

        .form-input.error {
            border-color: #DC3545;
            background-color: #FFEBEE;
        }

        .send-code-btn {
            padding: 12px 20px;
            background-color: #EF5100;
            color: #FFFFFF;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            white-space: nowrap;
            min-width: 120px;
        }

        .send-code-btn:hover:not(:disabled) {
            background-color: #D44400;
        }

        .send-code-btn:disabled {
            background-color: #CCCCCC;
            cursor: not-allowed;
        }

        .send-code-btn.countdown {
            background-color: #999999;
        }

        .error-msg {
            color: #DC3545;
            font-size: 12px;
            margin-top: 5px;
        }

        .success-message {
            color: #4CAF50;
            font-size: 12px;
            margin-top: 5px;
        }

        .next-btn {
            width: 100%;
            padding: 15px;
            background-color: #EF5100;
            color: #FFFFFF;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 30px;
        }

        .next-btn:hover:not(:disabled) {
            background-color: #D44400;
        }

        .next-btn:disabled {
            background-color: #CCCCCC;
            cursor: not-allowed;
        }

        /* ========== Loading State ========== */
        .loading-spinner {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid #FFFFFF;
            border-radius: 50%;
            border-top-color: transparent;
            animation: spin 0.8s linear infinite;
            margin-left: 8px;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* ========== Responsive Design ========== */
        @media (max-width: 768px) {
            .main-container {
                margin: 10px;
                padding: 40px 20px;
            }
            
            .welcome-title { font-size: 28px; }
            .member-info { font-size: 18px; }
            
            /* 步驟區塊 RWD 調整 - 保持居中 */
            .steps-wrapper { 
                width: 90%; 
                max-width: 500px;
            }
            .step-progress-line { 
                width: 85%;
                max-width: 450px;
            }
            .step-label { font-size: 12px; }
            
            .verification-section { padding: 30px 20px; }
        }

        @media (max-width: 480px) {
            .header { padding: 15px 20px; }
            .welcome-title { font-size: 24px; }
            .member-info { font-size: 16px; }
            .section-title { font-size: 18px; }
            
            /* 步驟區塊小螢幕調整 */
            .steps-wrapper { 
                width: 85%;
                max-width: 400px;
            }
            .step-progress-line { 
                width: 80%;
                max-width: 360px;
            }
            .step-label { 
                font-size: 11px;
                white-space: normal;
                width: 60px;
                line-height: 1.3;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }
            
            .input-group { flex-direction: column; }
            .send-code-btn { width: 100%; }
            
            .decorative-circles { right: -50px; top: -50px; width: 300px; height: 300px; }
            .circle-1 { width: 300px; height: 300px; }
            .circle-2 { width: 240px; height: 240px; top: 30px; right: 30px; }
            .circle-3 { width: 180px; height: 180px; top: 60px; right: 60px; }
        }