:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --text-color: #2c3e50;
    --bg-color: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.95);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e7eb 100%);
    color: var(--text-color);
    line-height: 1.6;
}

/* 导航栏样式 */
header {
    background: var(--card-bg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: center;  /* 更新为居中对齐 */
    align-items: center;
}

.logo {
    font-size: 1.8rem;  /* 稍微增大logo字体 */
    font-weight: 600;
    color: var(--primary-color);
}

/* 移除以下导航链接相关代码 */
/* .nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
} */

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.hero {
    position: relative;
    text-align: center;
    padding: 4rem 1rem;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, 
    rgba(52, 152, 219, 0.03) 0%,
    rgba(46, 204, 113, 0.03) 50%,
    rgba(52, 152, 219, 0.03) 100%);
    border-radius: 16px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 0% 0%, rgba(52, 152, 219, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(46, 204, 113, 0.1) 0%, transparent 50%);
    animation: gradientFloat 20s ease-in-out infinite;
    z-index: -1;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%233498db' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
    z-index: -1;
    animation: patternFloat 30s linear infinite;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, 
        var(--primary-color),
        var(--secondary-color),
        #2ecc71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientText 8s ease infinite;
    background-size: 300% 300%;
    text-shadow: 0 2px 15px rgba(52, 152, 219, 0.2);
}

/* 图片画廊 */
.solution-gallery {
    margin: 4rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 1rem;
}

.video-card {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(52, 152, 219, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
    position: relative;
}

.video-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.15);
    border-color: var(--primary-color);
}

.video-info h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.video-info p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    opacity: 0.8;
    line-height: 1.6;
}

.duration {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

/* 可以移除之前的 .video-frame 相关样式 */
.video-link {
    display: block;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
    border: 1px solid rgba(52, 152, 219, 0.2);
    position: relative;
}

.video-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(31, 38, 135, 0.15);
    border-color: var(--primary-color);
}

.video-title {
    display: block;
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.video-duration {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--primary-color);
}

.video-link::before {
    content: '▶';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
    opacity: 0.8;
}
.gallery-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    transition: transform 0.3s ease;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.gallery-grid img:hover {
    transform: translateY(-5px);
}

/* 页脚 */
footer {
    background: var(--card-bg);
    padding: 2rem;
    margin-top: 4rem;
    text-align: center;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    /* 移除以下代码 */
    /* .nav-links {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    } */

    .hero h1 {
        font-size: 2rem;
    }

    .newsletter form {
        flex-direction: column;
    }
}

/* 工具提示 */
.tooltip {
    position: absolute;
    background: var(--card-bg);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    font-size: 0.875rem;
    z-index: 1000;
    pointer-events: none;
}

.problem-solver {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 
        0 8px 32px rgba(31, 38, 135, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    position: relative;
    overflow: hidden;
}

.problem-solver::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--secondary-color), 
        var(--primary-color));
    background-size: 200% 100%;
    animation: gradientMove 3s linear infinite;
}

.problem-solver h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.form-group {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(52, 152, 219, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.form-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.15);
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 500;
    color: var(--text-color);
    font-size: 1.1rem;
}

.required {
    color: #e74c3c;
    margin-left: 4px;
}

.form-group select {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(52, 152, 219, 0.2);
    border-radius: 10px;
    background: white;
    font-size: 1rem;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%233498db' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2em;
}

.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    outline: none;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    border: 1px solid rgba(52, 152, 219, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-group label:hover {
    background: rgba(52, 152, 219, 0.05);
    border-color: var(--primary-color);
}

.checkbox-group input[type="checkbox"] {
    margin-right: 12px;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.problem-solver button[type="submit"] {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.problem-solver button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.problem-solver button[type="submit"]::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        rgba(255, 255, 255, 0.2),
        rgba(255, 255, 255, 0)
    );
    transform: rotate(45deg);
    animation: buttonShine 3s ease-in-out infinite;
}

@keyframes gradientMove {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

@keyframes buttonShine {
    0% { transform: rotate(45deg) translateX(-100%); }
    100% { transform: rotate(45deg) translateX(100%); }
}

.solution-display {
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(31, 38, 135, 0.12);
    animation: fadeIn 0.5s ease-out;
}

.solution-card {
    position: relative;
}

.solution-card h3 {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.solution-summary {
    background: rgba(52, 152, 219, 0.05);
    padding: 1.2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.urgency-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    margin-bottom: 1rem;
}

.urgency-critical .urgency-label {
    background: rgba(231, 76, 60, 0.1);
    color: #c0392b;
}

.urgency-urgent .urgency-label {
    background: rgba(243, 156, 18, 0.1);
    color: #d35400;
}

.urgency-standard .urgency-label {
    background: rgba(46, 204, 113, 0.1);
    color: #27ae60;
}

.solution-steps {
    margin-bottom: 2rem;
}

.solution-steps h4 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid rgba(52, 152, 219, 0.2);
    padding-bottom: 0.5rem;
}

.solution-steps ul {
    list-style: none;
    padding: 0;
}

.solution-steps li {
    position: relative;
    padding: 0.8rem 0 0.8rem 2rem;
    line-height: 1.5;
}

.solution-steps li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.urgent-notice {
    background: rgba(231, 76, 60, 0.1);
    border-left: 4px solid #e74c3c;
    padding: 1.2rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.prevention-tips {
    background: rgba(46, 204, 113, 0.1);
    border-radius: 8px;
    padding: 1.2rem;
    margin-top: 2rem;
}

.prevention-tips h4 {
    color: #27ae60;
    margin-bottom: 1rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 主要内容区域统一宽度设置 */
.hero,
.problem-solver,
.solution-gallery {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

/* 调整各部分的间距，使布局更协调 */
.hero {
    padding: 3rem 2.5rem;
    margin-bottom: 3rem;
}

.solution-gallery {
    margin: 3rem auto;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    backdrop-filter: blur(20px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    main {
        padding: 1rem!important;
    }
    nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 0.5rem;
    }

    .nav-links {
        width: 100%;
        display: flex;
        justify-content: space-between;
        gap: 0;
    }

    .nav-links li {
        flex: 1;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    .hero,
    .problem-solver,
    .solution-gallery {
        padding: 2rem 1.5rem;
        margin: 2rem auto;
    }
}

.video-frame {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.video-frame:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(31, 38, 135, 0.15);
}

/* 可以移除之前的 .video-link 相关样式 */
.benefits-section {
    max-width: 1000px;
    margin: 0 auto 3rem;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(52, 152, 219, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.15);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.benefit-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.benefit-card p {
    color: var(--text-color);
    line-height: 1.6;
}

.cta-block {
    text-align: center;
    padding: 1.5rem;
    background: rgba(52, 152, 219, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(52, 152, 219, 0.1);
}

.cta-text {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.features-list {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.feature-item {
    background: white;
    padding: 0.5rem 1.2rem;
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--primary-color);
    border: 1px solid rgba(52, 152, 219, 0.2);
}

@media (max-width: 768px) {
    .benefits-section {
        padding: 2rem 1.5rem;
        margin: 2rem auto;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .features-list {
        gap: 1rem;
    }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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

.problem-solver button[type="submit"]:disabled {
    opacity: 0.8;
    cursor: not-allowed;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #fff;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #333;
}

.nav-links a.active {
    color: #333;
    position: relative;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 2px;
    transform: translate(50%, -50%);
    background-color: #333;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links a.active::after {
        bottom: -4px!important;
    }
    nav {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }
}

.hero h1 {
    font-size: 2rem;
}

.newsletter form {
    flex-direction: column;
}

/* 工具提示 */
.tooltip {
    position: absolute;
    background: var(--card-bg);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    font-size: 0.875rem;
    z-index: 1000;
    pointer-events: none;
}

.problem-solver {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 
        0 8px 32px rgba(31, 38, 135, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    position: relative;
    overflow: hidden;
}

.problem-solver::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--secondary-color), 
        var(--primary-color));
    background-size: 200% 100%;
    animation: gradientMove 3s linear infinite;
}

.problem-solver h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.form-group {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(52, 152, 219, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.form-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.15);
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 500;
    color: var(--text-color);
    font-size: 1.1rem;
}

.required {
    color: #e74c3c;
    margin-left: 4px;
}

.form-group select {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(52, 152, 219, 0.2);
    border-radius: 10px;
    background: white;
    font-size: 1rem;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%233498db' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2em;
}

.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    outline: none;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    border: 1px solid rgba(52, 152, 219, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-group label:hover {
    background: rgba(52, 152, 219, 0.05);
    border-color: var(--primary-color);
}

.checkbox-group input[type="checkbox"] {
    margin-right: 12px;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.problem-solver button[type="submit"] {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.problem-solver button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.problem-solver button[type="submit"]::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        rgba(255, 255, 255, 0.2),
        rgba(255, 255, 255, 0)
    );
    transform: rotate(45deg);
    animation: buttonShine 3s ease-in-out infinite;
}

@keyframes gradientMove {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

@keyframes buttonShine {
    0% { transform: rotate(45deg) translateX(-100%); }
    100% { transform: rotate(45deg) translateX(100%); }
}

.solution-display {
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(31, 38, 135, 0.12);
    animation: fadeIn 0.5s ease-out;
}

.solution-card {
    position: relative;
}

.solution-card h3 {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.solution-summary {
    background: rgba(52, 152, 219, 0.05);
    padding: 1.2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.urgency-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    margin-bottom: 1rem;
}

.urgency-critical .urgency-label {
    background: rgba(231, 76, 60, 0.1);
    color: #c0392b;
}

.urgency-urgent .urgency-label {
    background: rgba(243, 156, 18, 0.1);
    color: #d35400;
}

.urgency-standard .urgency-label {
    background: rgba(46, 204, 113, 0.1);
    color: #27ae60;
}

.solution-steps {
    margin-bottom: 2rem;
}

.solution-steps h4 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid rgba(52, 152, 219, 0.2);
    padding-bottom: 0.5rem;
}

.solution-steps ul {
    list-style: none;
    padding: 0;
}

.solution-steps li {
    position: relative;
    padding: 0.8rem 0 0.8rem 2rem;
    line-height: 1.5;
}

.solution-steps li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.urgent-notice {
    background: rgba(231, 76, 60, 0.1);
    border-left: 4px solid #e74c3c;
    padding: 1.2rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.prevention-tips {
    background: rgba(46, 204, 113, 0.1);
    border-radius: 8px;
    padding: 1.2rem;
    margin-top: 2rem;
}

.prevention-tips h4 {
    color: #27ae60;
    margin-bottom: 1rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 主要内容区域统一宽度设置 */
.hero,
.problem-solver,
.solution-gallery {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

/* 调整各部分的间距，使布局更协调 */
.hero {
    padding: 3rem 2.5rem;
    margin-bottom: 3rem;
}

.solution-gallery {
    margin: 3rem auto;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    backdrop-filter: blur(20px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero,
    .problem-solver,
    .solution-gallery {
        padding: 2rem 1.5rem;
        margin: 2rem auto;
    }
}

.video-frame {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.video-frame:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(31, 38, 135, 0.15);
}

/* 可以移除之前的 .video-link 相关样式 */
.benefits-section {
    max-width: 1000px;
    margin: 0 auto 3rem;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(52, 152, 219, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.15);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.benefit-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.benefit-card p {
    color: var(--text-color);
    line-height: 1.6;
}

.cta-block {
    text-align: center;
    padding: 1.5rem;
    background: rgba(52, 152, 219, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(52, 152, 219, 0.1);
}

.cta-text {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.features-list {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.feature-item {
    background: white;
    padding: 0.5rem 1.2rem;
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--primary-color);
    border: 1px solid rgba(52, 152, 219, 0.2);
}

@media (max-width: 768px) {
    .benefits-section {
        padding: 2rem 1.5rem;
        margin: 2rem auto;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .features-list {
        gap: 1rem;
    }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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

.problem-solver button[type="submit"]:disabled {
    opacity: 0.8;
    cursor: not-allowed;
}