/* 白皮书落地页专属样式 */

.whitepaper-page {
    padding-top: 0;
}

/* Hero区块 */
.whitepaper-hero {
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.whitepaper-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,122.7C960,117,1056,171,1152,192C1248,213,1344,203,1392,197.3L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.whitepaper-hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.whitepaper-hero .subtitle {
    font-size: 28px;
    opacity: 0.95;
    margin-bottom: 25px;
    font-weight: 300;
}

.whitepaper-hero .lead {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.8;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 核心内容区块 */
.content-overview {
    padding: 80px 0;
    background: #f8f9fa;
}

.content-overview h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 50px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.content-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.content-card.featured {
    border: 3px solid #2ECC71;
}

.content-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: #2ECC71;
    color: white;
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
}

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

.content-card h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 22px;
}

.content-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.content-card li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
    line-height: 1.6;
    border-bottom: 1px solid #f0f0f0;
}

.content-card li:last-child {
    border-bottom: none;
}

.content-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2ECC71;
    font-weight: bold;
    font-size: 16px;
}

/* 数据摘要区块 */
.data-summary {
    padding: 80px 0;
    background: white;
}

.data-summary h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 50px;
}

.data-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    max-width: 1000px;
    margin: 0 auto;
}

.data-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f5e9 100%);
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.data-card:hover {
    transform: translateY(-5px);
}

.data-card.highlight {
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
    color: white;
}

.data-number {
    font-size: 48px;
    font-weight: 700;
    color: #2ECC71;
    margin-bottom: 10px;
}

.data-card.highlight .data-number {
    color: white;
}

.data-label {
    font-size: 16px;
    color: #666;
    font-weight: 500;
}

.data-card.highlight .data-label {
    color: rgba(255,255,255,0.9);
}

/* 白皮书封面展示 */
.whitepaper-cover {
    padding: 80px 0;
    background: #f8f9fa;
}

.whitepaper-cover h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 50px;
}

.cover-display {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 50px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.cover-image {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

.cover-placeholder {
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
    color: white;
    padding: 60px 30px;
    border-radius: 8px;
    text-align: center;
    position: relative;
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.cover-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 30px;
}

.cover-year {
    display: block;
    font-size: 48px;
    margin-bottom: 15px;
}

.cover-subtitle {
    display: block;
    font-size: 24px;
    font-weight: 300;
}

.cover-author {
    font-size: 16px;
    opacity: 0.9;
    margin-top: 40px;
}

.cover-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: white;
    color: #2ECC71;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.cover-info {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.cover-info h3 {
    color: #333;
    margin-bottom: 25px;
    font-size: 24px;
}

.cover-info ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.cover-info li {
    padding: 15px 0;
    font-size: 18px;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}

.cover-info li:last-child {
    border-bottom: none;
}

/* 领取方式区块 */
.领取方式 {
    padding: 80px 0;
    background: white;
}

.领取方式 h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 50px;
}

.领取方式-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.领取方式-card {
    background: #f8f9fa;
    padding: 35px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s ease;
}

.领取方式-card:hover {
    transform: translateY(-5px);
}

.领取方式-card.featured {
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
    color: white;
}

.领取方式-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.领取方式-card h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 22px;
}

.领取方式-card.featured h3 {
    color: white;
}

.领取方式-value {
    font-size: 20px;
    font-weight: bold;
    color: #2ECC71;
    margin-bottom: 10px;
}

.领取方式-card.featured .领取方式-value {
    color: white;
}

.领取方式-desc {
    color: #666;
    font-size: 14px;
}

.领取方式-card.featured .领取方式-desc {
    color: rgba(255,255,255,0.9);
}

/* 预约表单区块 */
.whitepaper-form {
    max-width: 800px;
    margin: 0 auto;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* FAQ区块 */
.faq {
    padding: 80px 0;
    background: #f8f9fa;
}

.faq h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 50px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.faq-item:hover {
    transform: translateX(10px);
}

.faq-question {
    display: flex;
    align-items: center;
    padding: 25px 30px;
    cursor: pointer;
    background: white;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-icon {
    width: 30px;
    height: 30px;
    background: #2ECC71;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 15px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: #E74C3C;
}

.faq-title {
    font-size: 18px;
    color: #333;
    margin: 0;
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 30px 25px;
}

.faq-answer p {
    color: #555;
    line-height: 1.8;
    margin: 0;
}

/* CTA区块 */
.cta-final {
    padding: 80px 0;
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
    color: white;
    text-align: center;
}

.cta-final h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta-final p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: #2ECC71;
    color: white;
}

.btn-primary:hover {
    background: #27AE60;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(46, 204, 113, 0.4);
}

.btn-secondary {
    background: white;
    color: #2ECC71;
}

.btn-secondary:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.btn-large {
    padding: 18px 50px;
    font-size: 20px;
}

.btn-block {
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .cover-display {
        grid-template-columns: 1fr;
    }
    
    .data-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .领取方式-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .whitepaper-hero h1 {
        font-size: 32px;
    }
    
    .whitepaper-hero .subtitle {
        font-size: 22px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .content-overview h2,
    .data-summary h2,
    .whitepaper-cover h2,
    .领取方式 h2,
    .faq h2 {
        font-size: 28px;
    }
    
    .data-cards {
        grid-template-columns: 1fr;
    }
    
    .faq-question {
        padding: 20px;
    }
    
    .faq-answer {
        padding: 0 20px;
    }
    
    .cta-final h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .whitepaper-hero {
        padding: 60px 0;
    }
    
    .whitepaper-hero h1 {
        font-size: 26px;
    }
    
    .content-card {
        padding: 25px;
    }
    
    .cover-placeholder {
        min-height: 350px;
        padding: 40px 20px;
    }
    
    .cover-title {
        font-size: 24px;
    }
    
    .cover-year {
        font-size: 36px;
    }
    
    .cover-subtitle {
        font-size: 18px;
    }
    
    .cover-info {
        padding: 30px;
    }
}