/* 首页专用样式 - index.css */

/* Hero Banner */
.hero-banner {
    background: linear-gradient(135deg, #e53937 0%, #ff6b6b 100%);
    color: #fff;
    padding: 80px 0 100px;
    margin-bottom: 30px;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

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

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    letter-spacing: 2px;
    animation: fadeInDown 0.8s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    letter-spacing: 1px;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-search {
    max-width: 800px;
    margin: 0 auto 30px;
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-search input {
    width: 100%;
    padding: 22px 180px 22px 25px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transition: all 0.3s;
}

.hero-search input:focus {
    outline: none;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.hero-search button {
    position: absolute;
    right: 5px;
    top: 5px;
    padding: 17px 45px;
    background: linear-gradient(135deg, #333 0%, #555 100%);
    color: #fff;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-search button:hover {
    background: linear-gradient(135deg, #222 0%, #444 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 热门搜索标签 */
.hot-searches {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.hot-label {
    font-size: 14px;
    opacity: 0.9;
    margin-right: 5px;
}

.hot-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hot-tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 功能卡片 */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.feature-card {
    background-color: #fff;
    padding: 30px 20px;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid #f0f0f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    border-color: #e53937;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-card h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 18px;
}

.feature-card p {
    color: #666;
    font-size: 13px;
}

/* 统计数据 */
.stats-section {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #e53937;
    margin-bottom: 10px;
}

.stat-label {
    color: #666;
    font-size: 14px;
}

/* 最新标准 */
.latest-standards {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.standards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.standard-card {
    padding: 20px;
    border: 1px solid #eee;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.standard-card:hover {
    border-color: #e53937;
    box-shadow: 0 2px 8px rgba(229,57,55,0.1);
    transform: translateX(5px);
}

.standard-card h4 {
    color: #019EFF;
    margin-bottom: 10px;
    font-size: 16px;
}

.standard-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .feature-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .standards-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .feature-cards {
        grid-template-columns: 1fr;
    }
}