:root {
    --primary: #ff7b6b;
    --primary-dark: #e76b5b;
    --secondary: #5d9cec;
    --accent: #4cd964;
    --light: #fff9f5;
    --dark: #4a3f35;
    --gray: #f8f5f0;
    --gray-dark: #e9e5de;
    --shadow: 0 8px 24px rgba(93, 64, 55, 0.08);
    --shadow-hover: 0 12px 32px rgba(93, 64, 55, 0.15);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--light);
    color: #333;
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.top-bar {
    background: var(--dark);
    color: white;
    padding: 8px 0;
    font-size: 0.9rem;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.contact-info {
    display: flex;
    gap: 20px;
}

.contact-info span {
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.social-top a {
    color: white;
    transition: var(--transition);
}

.social-top a:hover {
    color: var(--primary);
}

/* 主导航栏 */
header {
    background: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--dark);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text h1 {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
}

.logo-text span {
    font-size: 0.9rem;
    color: #777;
    font-weight: 400;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-list a {
    display: block;
    padding: 12px 20px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
    border-radius: 25px;
    transition: var(--transition);
    position: relative;
}

.nav-list a:hover, .nav-list a.active {
    color: var(--primary);
    background: rgba(255, 123, 107, 0.08);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.nav-list a:hover::after, .nav-list a.active::after {
    transform: scaleX(1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-btn, .cart-btn, .user-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray);
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.search-btn:hover, .cart-btn:hover, .user-btn:hover {
    background: var(--primary);
    color: white;
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(255, 250, 245, 0.9), rgba(255, 245, 240, 0.9)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.05"><path d="M20,20 Q40,5 60,20 T100,20 L80,80 Q60,95 40,80 T0,80 Z" fill="%234a3f35"/></svg>');
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(45deg, rgba(255, 123, 107, 0.1), rgba(93, 156, 236, 0.1));
    clip-path: polygon(100% 0, 100% 100%, 0 0);
}

.hero-content {
    position: relative;
    max-width: 700px;
}

.hero h2 {
    font-size: 3.5rem;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 800;
}

.hero h2 span {
    color: var(--primary);
}

.hero p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 30px;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 123, 107, 0.3);
    background: var(--primary-dark);
}

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

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

.btn-secondary {
    background: var(--secondary);
}

.btn-secondary:hover {
    background: #4a8be0;
    box-shadow: 0 10px 20px rgba(93, 156, 236, 0.3);
}

/* 功能卡片 */
.section {
    padding: 100px 0;
}

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

.section-subtitle {
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.8rem;
    color: var(--dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.section-desc {
    color: #666;
    max-width: 700px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* 材料展示 */
.materials {
    background: var(--gray);
}

.material-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: white;
    border: 2px solid var(--gray-dark);
    border-radius: 30px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.material-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.material-img {
    height: 200px;
    background: linear-gradient(135deg, #ff7b6b, #5d9cec);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3.5rem;
}

.material-content {
    padding: 25px;
}

.material-content h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.material-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 12px;
    background: var(--gray);
    border-radius: 20px;
    font-size: 0.85rem;
    color: #666;
}

/* 社区作品 */
.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.community-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.community-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.community-img {
    height: 250px;
    background: linear-gradient(45deg, var(--secondary), var(--accent));
    position: relative;
    overflow: hidden;
}

.community-img::after {
    content: '作品展示';
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0,0,0,0.3);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.community-content {
    padding: 20px;
}

.community-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.author-info h5 {
    font-size: 1rem;
    margin-bottom: 3px;
}

.author-info span {
    font-size: 0.85rem;
    color: #888;
}

.likes {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #ff4757;
}

/* 商城 */
.shop {
    background: var(--gray);
}

.swiper-container {
    width: 100%;
    padding: 20px 0 40px;
}

.swiper-slide {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.swiper-slide:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.product-img {
    height: 200px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.product-info {
    padding: 20px;
}

.product-category {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.product-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.product-price {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 15px;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.price del {
    font-size: 1rem;
    color: #999;
    margin-left: 5px;
}

/* 底部 */
footer {
    background: var(--dark);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-links i {
    width: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.newsletter {
    margin-top: 20px;
}

.newsletter p {
    margin-bottom: 15px;
    color: #ccc;
}

.newsletter-form {
    display: flex;
}

.newsletter-input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 30px 0 0 30px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.newsletter-input::placeholder {
    color: #aaa;
}

.newsletter-btn {
    padding: 0 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0 30px 30px 0;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-btn:hover {
    background: var(--primary-dark);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h2 {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 100;
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: 5px;
    }

    .hero h2 {
        font-size: 2.3rem;
    }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 70px 0;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* 动画类 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(255, 123, 107, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}