/* ===========================
   淡蓝色科技小清新风格
   =========================== */

/* 颜色变量 */
:root {
    --primary: #4A90E2;           /* 主色调：淡蓝 */
    --primary-light: #7AB8F5;     /* 浅蓝 */
    --primary-dark: #2E5C8A;      /* 深蓝 */
    --accent: #5DD5C3;            /* 点缀色：青绿 */
    --dark: #2C3E50;              /* 深灰蓝 */
    --gray: #7F8C8D;              /* 灰色 */
    --light-gray: #ECF0F1;        /* 浅灰 */
    --bg-light: #F8FBFF;          /* 背景浅蓝 */
    --white: #FFFFFF;
    --border: #E3EDF7;            /* 边框浅蓝 */
    --success: #52C41A;
    --warning: #FAAD14;
    --danger: #FF4D4F;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.8;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   导航栏
   =========================== */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(74, 144, 226, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a:hover::after {
    width: 100%;
}

.cart-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white !important;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
}

.cart-btn::after {
    display: none;
}

.cart-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

/* ===========================
   主视觉区
   =========================== */
.hero {
    position: relative;
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 50%, #90CAF9 100%);
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(93, 213, 195, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(74, 144, 226, 0.15) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 80px 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--dark);
    margin-bottom: 40px;
    opacity: 0.85;
}

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

/* ===========================
   按钮样式
   =========================== */
.btn {
    padding: 14px 36px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(74, 144, 226, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

.btn-add-cart {
    width: 100%;
    background: linear-gradient(135deg, var(--accent) 0%, #4EC9B8 100%);
    color: white;
    margin-top: 16px;
    box-shadow: 0 4px 15px rgba(93, 213, 195, 0.3);
}

.btn-add-cart:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(93, 213, 195, 0.4);
}

.btn-full {
    width: 100%;
}

/* ===========================
   品牌优势横幅
   =========================== */
.features-banner {
    background: var(--white);
    padding: 40px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.feature-item h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.feature-item p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===========================
   产品区域
   =========================== */
.products-section {
    padding: 100px 20px;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 16px;
    font-weight: 700;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
}

/* 产品分类按钮 */
.product-categories {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 12px 28px;
    border: 2px solid var(--border);
    background: white;
    border-radius: 25px;
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-btn:hover,
.category-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* 产品卡片网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.08);
    transition: all 0.4s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(74, 144, 226, 0.15);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
    z-index: 10;
}

.product-badge.hot {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 100%);
}

.product-badge.new {
    background: linear-gradient(135deg, var(--accent) 0%, #4EC9B8 100%);
}

.product-badge.sale {
    background: linear-gradient(135deg, #A166FF 0%, #C766FF 100%);
}

.product-image {
    background: linear-gradient(135deg, #F0F8FF 0%, #E3F2FD 100%);
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.placeholder-img {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary);
    opacity: 0.4;
    text-align: center;
}

.product-info {
    padding: 24px;
}

.product-name {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 12px;
    font-weight: 600;
    line-height: 1.4;
}

.product-desc {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-rating {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.rating-text {
    color: var(--gray);
    font-size: 0.9rem;
}

.product-price-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.price-group {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.price-current {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.price-original {
    font-size: 1.1rem;
    color: var(--gray);
    text-decoration: line-through;
}

.price-badge {
    background: linear-gradient(135deg, #FFE5E5 0%, #FFD6D6 100%);
    color: var(--danger);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===========================
   客户评价区域
   =========================== */
.testimonials-section {
    padding: 100px 20px;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 20px;
    border: 2px solid var(--border);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(74, 144, 226, 0.1);
}

.stars {
    color: #FFB800;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.testimonial-text {
    color: var(--dark);
    line-height: 1.8;
    margin-bottom: 24px;
    font-size: 1rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.author-name {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.author-location {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===========================
   关于我们
   =========================== */
.about-section {
    padding: 100px 20px;
    background: linear-gradient(135deg, #F0F8FF 0%, #E3F2FD 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro {
    font-size: 1.2rem;
    color: var(--dark);
    margin: 24px 0 32px;
    line-height: 1.8;
}

.about-features {
    list-style: none;
    margin-bottom: 32px;
}

.about-features li {
    padding: 12px 0;
    color: var(--dark);
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border);
}

.about-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stat-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.1);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(74, 144, 226, 0.15);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--gray);
    font-size: 1rem;
}

/* ===========================
   常见问题
   =========================== */
.faq-section {
    padding: 100px 20px;
    background: white;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.faq-item {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 16px;
    border-left: 4px solid var(--primary);
    transition: all 0.3s ease;
}

.faq-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.1);
}

.faq-question {
    color: var(--dark);
    font-size: 1.15rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.faq-answer {
    color: var(--gray);
    line-height: 1.8;
}

/* ===========================
   资讯动态
   =========================== */
.news-section {
    padding: 100px 20px;
    background: var(--bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.news-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.08);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(74, 144, 226, 0.15);
}

.news-image {
    height: 220px;
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-content {
    padding: 28px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 0.85rem;
}

.news-category {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
}

.news-date {
    color: var(--gray);
}

.news-title {
    color: var(--dark);
    font-size: 1.2rem;
    margin-bottom: 12px;
    font-weight: 600;
    line-height: 1.5;
}

.news-excerpt {
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.news-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.news-link:hover {
    color: var(--primary-dark);
    gap: 8px;
}

/* ===========================
   联系我们
   =========================== */
.contact-section {
    padding: 100px 20px;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-subtitle {
    color: var(--gray);
    font-size: 1.1rem;
    margin: 16px 0 40px;
    line-height: 1.7;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.contact-icon {
    font-size: 1.8rem;
}

.contact-label {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.contact-value {
    color: var(--dark);
    font-weight: 600;
    font-size: 1.05rem;
}

/* 联系表单 */
.contact-form-wrapper {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
}

.contact-form h3 {
    color: var(--dark);
    font-size: 1.5rem;
    margin-bottom: 28px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 20px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 80px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 12px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-icon {
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin: 0 8px;
}

.footer-bottom a:hover {
    color: white;
}

/* ===========================
   响应式设计
   =========================== */
@media (max-width: 968px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .nav-menu {
        gap: 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
}