.hero {
            background: linear-gradient(135deg, #1a5fb4 0%, #667eea 100%);
            color: #fff;
            padding: 80px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: heroShine 8s ease-in-out infinite;
        }
        
        @keyframes heroShine {
            0%, 100% { transform: scale(1); opacity: 0.5; }
            50% { transform: scale(1.2); opacity: 0.8; }
        }
        
        .hero .container {
            position: relative;
            z-index: 1;
        }
        
        .hero h1 {
            font-size: 42px;
            margin-bottom: 20px;
            font-weight: 700;
            text-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .hero p {
            font-size: 18px;
            opacity: 0.95;
            margin: 0 auto 32px;
            white-space: nowrap;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-btn {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 32px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            letter-spacing: 0.5px;
        }

        .hero-btn-primary {
            background: #fff;
            color: #1a5fb4;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
        }

        .hero-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.2);
            background: #f0f4ff;
        }

        .hero-btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.5);
        }

        .hero-btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            transform: translateY(-3px);
        }

        .calculators-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            padding: 60px 0;
        }
        
        .calc-card {
            background: #fff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            text-decoration: none;
            color: inherit;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border: 2px solid transparent;
            position: relative;
            overflow: hidden;
        }
        
        .calc-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #1a5fb4, #667eea);
            transform: scaleX(0);
            transition: transform 0.4s ease;
        }
        
        .calc-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.12);
            border-color: #e0e6ed;
        }
        
        .calc-card:hover::before {
            transform: scaleX(1);
        }
        
        .calc-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, #1a5fb4 0%, #667eea 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
            box-shadow: 0 4px 15px rgba(26, 95, 180, 0.3);
        }
        
        .calc-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: #2c3e50;
            font-weight: 600;
        }
        
        .calc-card p {
            font-size: 14px;
            color: #718096;
            line-height: 1.6;
        }
        
        .features {
            background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
            padding: 60px 0;
        }
        
        .features h2 {
            text-align: center;
            font-size: 28px;
            margin-bottom: 20px;
            color: #2c3e50;
            font-weight: 600;
            position: relative;
        }
        
        .features h2::after {
            content: "";
            display: block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, #1a5fb4, #667eea);
            margin: 15px auto 0;
            border-radius: 2px;
        }

        /* 品牌主张卡片 */
        .brand-slogan {
            background: linear-gradient(135deg, #f0f4ff 0%, #e8edf8 100%);
            border-radius: 12px;
            padding: 28px 32px;
            margin: 28px auto 24px;
            max-width: 620px;
            border-left: 4px solid #1a5fb4;
            box-shadow: 0 2px 12px rgba(26,95,180,0.08);
            animation: sloganFadeIn 0.8s ease-out;
        }

        .brand-slogan p {
            text-align: center;
            font-size: 18px;
            color: #1a2a3a;
            line-height: 1.9;
            margin: 0;
            font-weight: 500;
        }

        @keyframes sloganFadeIn {
            from {
                opacity: 0;
                transform: translateY(18px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 标语到功能卡片的过渡 */
        .features-bridge {
            color: #94a3b8;
            font-size: 14px;
            margin-bottom: 28px;
        }

        /* 服务流程区块间距 */
        .section-service-flow {
            padding-top: 60px;
        }

.features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        
        .feature-item {
            text-align: center;
            padding: 30px 20px;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.06);
            transition: all 0.3s ease;
        }
        
        .feature-item .feature-icon {
            font-size: 36px;
            margin-bottom: 15px;
        }
        
        .feature-item h4 {
            font-size: 16px;
            margin-bottom: 10px;
        }
        
        .feature-item p {
            font-size: 13px;
            line-height: 1.6;
        }
        
        .feature-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .feature-icon {
            font-size: 40px;
            margin-bottom: 20px;
        }
        
        .feature-item h4 {
            font-size: 16px;
            margin-bottom: 10px;
            color: #2c3e50;
            font-weight: 600;
        }
        
        .feature-item p {
            font-size: 14px;
            color: #718096;
            line-height: 1.6;
        }
        
        .auth-buttons {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        
        .login-btn, .register-btn {
            padding: 8px 16px;
            border-radius: 20px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
.login-btn {
            background: transparent;
            color: rgba(255,255,255,0.9);
            border: 1px solid rgba(255,255,255,0.3);
        }
        
        .login-btn:hover {
            background: rgba(255,255,255,0.15);
        }
        
.register-btn {
            background: rgba(255,255,255,0.2);
            color: white;
            border: 1px solid rgba(255,255,255,0.3);
        }
        
        .register-btn:hover {
            background: rgba(255,255,255,0.3);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(255,255,255,0.2);
        }
        
        .modal {
            display: none;
            position: fixed;
            z-index: 1000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0, 0, 0, 0.5);
        }
        
        .modal-content {
            background-color: #fff;
            margin: 5% auto;
            padding: 30px;
            border-radius: 16px;
            width: 90%;
            max-width: 400px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
            animation: modalSlideIn 0.3s ease-out;
        }
        
        @keyframes modalSlideIn {
            from {
                transform: translateY(-50px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }
        
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .modal-header h2 {
            font-size: 20px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        .close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
        }
        
        .close:hover {
            color: #000;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            font-weight: 500;
            color: #2c3e50;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #e0e6ed;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #1a5fb4;
            box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
        }
        
        .btn-primary {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #1a5fb4 0%, #667eea 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(26, 95, 180, 0.3);
        }
        
        .auth-toggle {
            text-align: center;
            margin-top: 15px;
            font-size: 14px;
            color: #718096;
        }
        
        .auth-toggle a {
            color: #1a5fb4;
            text-decoration: none;
            font-weight: 500;
        }
        
        .auth-toggle a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            color: #e53e3e;
            font-size: 12px;
            margin-top: 5px;
            display: none;
        }
        
        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .remember-me {
            display: flex;
            align-items: center;
            font-size: 14px;
            color: #2c3e50;
            cursor: pointer;
        }
        
        .remember-me input {
            margin-right: 8px;
            width: auto;
        }
        
        .forgot-password {
            font-size: 14px;
            color: #1a5fb4;
            text-decoration: none;
        }
        
        .forgot-password:hover {
            text-decoration: underline;
        }
        
        .user-info {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .user-name {
            font-weight: 500;
            color: #2c3e50;
        }
        
        .logout-btn {
            padding: 6px 12px;
            background: #f1f5f9;
            color: #2c3e50;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .logout-btn:hover {
            background: #e2e8f0;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 28px;
            }

            .hero p {
                font-size: 16px;
                white-space: normal;
                max-width: 90%;
            }

            .hero-btn {
                padding: 12px 28px;
                font-size: 15px;
            }

            .hero {
                padding: 50px 0 70px;
            }

            .calculators-grid {
                padding: 30px 0;
                gap: 16px;
            }

            .calc-card {
                padding: 20px;
            }

            .calc-icon {
                width: 50px;
                height: 50px;
                font-size: 22px;
                border-radius: 12px;
            }

            .calc-card h3 {
                font-size: 16px;
            }

            .calc-card p {
                font-size: 13px;
            }

.features {
                padding: 40px 0;
            }

            .features h2 {
                font-size: 22px;
            }

            .brand-slogan {
                padding: 20px 24px;
                margin: 20px auto 18px;
                max-width: 100%;
            }

            .brand-slogan p {
                font-size: 16px;
                line-height: 1.8;
            }

            .features-bridge {
                font-size: 13px;
                margin-bottom: 20px;
            }

            .section-service-flow {
                padding-top: 40px;
            }

            .features-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }

            .feature-item {
                padding: 20px;
            }

            .auth-buttons {
                gap: 5px;
            }

            .login-btn, .register-btn {
                padding: 6px 12px;
                font-size: 14px;
            }

            .modal-content {
                padding: 20px;
                margin: 15% auto;
            }
        }