:root {
    --primary-color: #ff6b35;
    --primary-hover: #e85a26;
    --secondary-color: #2ec4b6;
    --dark-color: #1e293b;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--light-bg);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航 Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-item {
    position: relative;
    padding: 24px 0;
}

.nav-link {
    font-weight: 600;
    font-size: 15px;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: white;
    min-width: 200px;
    padding: 12px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
}

.dropdown.wide {
    min-width: 280px;
    grid-template-columns: 1fr 1fr;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown-item:hover, .dropdown-item.active {
    background-color: #fff1ec;
    color: var(--primary-color);
}

/* 搜索框 */
.search-box {
    position: relative;
    width: 220px;
}

.search-input {
    width: 100%;
    padding: 8px 16px 8px 38px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background: var(--light-bg);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary-color);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 14px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark-color);
    cursor: pointer;
    padding: 4px;
}

/* 面包屑导航 Breadcrumbs */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: 13px;
    color: var(--text-muted);
}

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

.breadcrumb-separator {
    color: #cbd5e1;
}

.breadcrumb-current {
    color: var(--dark-color);
    font-weight: 600;
}

/* Hero Header Section */
.category-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-radius: var(--radius-lg);
    color: white;
    padding: 40px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.category-hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
}

.category-hero-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.category-hero-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
}

.category-hero-desc {
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
    opacity: 0.88;
    margin-bottom: 24px;
    line-height: 1.6;
}

.category-stats {
    display: flex;
    gap: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-label {
    font-size: 12px;
    opacity: 0.7;
}

.hero-bg-img {
    position: absolute;
    right: -20px;
    top: -20px;
    bottom: -20px;
    width: 50%;
    object-fit: cover;
    opacity: 0.35;
    mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
}

/* 筛选与排序 Filter Bar */
.filter-section {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
}

.filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.filter-chips {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.filter-chips::-webkit-scrollbar {
    display: none;
}

.filter-chip {
    padding: 6px 16px;
    border-radius: 20px;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
    user-select: none;
}

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

.sort-dropdown {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
}

/* 增强后的排序下拉框样式 */
.sort-select {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: white;
    font-size: 13px;
    font-weight: 600;
    color: var(--dark-color);
    outline: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.sort-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.15);
}

.sort-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

/* 食谱网格及卡片 */
.section-padding {
    padding: 20px 0 40px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.section-title {
    font-size: clamp(1.25rem, 2vw, 1.6rem);
    font-weight: 800;
    color: var(--dark-color);
}

.section-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.recipe-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.recipe-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.recipe-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.recipe-img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.recipe-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.recipe-card:hover .recipe-img {
    transform: scale(1.05);
}

.badge-fav {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    z-index: 10;
    user-select: none;
}

.badge-fav:hover {
    background: white;
    transform: scale(1.15);
}

.badge-difficulty {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(4px);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
}

.recipe-body {
    padding: 18px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.recipe-tags {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.tag {
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 600;
    background: #f1f5f9;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    z-index: 5;
}

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

.tag.highlight {
    background: #fff1ec;
    color: var(--primary-color);
}

.tag.highlight:hover {
    background: var(--primary-color);
    color: white;
}

.recipe-title {
    font-size: 16.5px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 6px;
    line-height: 1.35;
}

.recipe-desc {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recipe-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px dashed var(--border-color);
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 6px;
}

.recipe-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.rating {
    color: #f59e0b;
    font-weight: 700;
}

.reviews-count {
    color: var(--text-muted);
    font-size: 11px;
}

/* 汉堡灵魂要素技巧板块 Burger Master Guide */
.guide-section {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 32px 28px;
    margin: 40px 0;
    box-shadow: var(--shadow-sm);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.guide-card {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.guide-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.guide-icon {
    font-size: 28px;
    margin-bottom: 10px;
}

.guide-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 6px;
}

.guide-text {
    font-size: 12.5px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 智能DIY汉堡搭配器 */
.diy-builder {
    background: linear-gradient(135deg, #2ec4b6 0%, #0f766e 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    margin: 40px 0;
}

.diy-title {
    font-size: clamp(1.4rem, 2.5vw, 1.85rem);
    font-weight: 800;
    margin-bottom: 10px;
}

.diy-desc {
    font-size: 14px;
    opacity: 0.92;
    max-width: 600px;
    margin: 0 auto 24px;
    line-height: 1.5;
}

.diy-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    max-width: 900px;
    margin: 0 auto 24px;
    text-align: left;
}

.diy-step-box {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: 14px;
}

.diy-step-num {
    font-size: 11px;
    font-weight: 800;
    color: #fef08a;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.diy-step-name {
    font-size: 13.5px;
    font-weight: 700;
    margin-bottom: 8px;
}

.diy-select {
    width: 100%;
    padding: 6px;
    border-radius: var(--radius-sm);
    border: none;
    background: white;
    color: var(--dark-color);
    font-size: 12px;
    font-weight: 600;
    outline: none;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary-color);
    color: white;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 14.5px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.3);
}

/* 分页器 Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--dark-color);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Newsletter & Footer */
.newsletter-box {
    background: #fff1ec;
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    text-align: center;
    margin: 40px 0;
}

.newsletter-form {
    display: flex;
    justify-content: center;
    gap: 10px;
    max-width: 480px;
    margin: 18px auto 0;
}

.newsletter-input {
    flex: 1;
    padding: 10px 18px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    outline: none;
    font-size: 14px;
    min-width: 0;
}

footer {
    background: var(--dark-color);
    color: #94a3b8;
    padding: 50px 0 24px;
    margin-top: 50px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 30px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 12px;
}

.footer-title {
    color: white;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 14px;
}

.footer-links li {
    margin-bottom: 8px;
    font-size: 13px;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid #334155;
    text-align: center;
    font-size: 13px;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .nav-menu { display: none; }
    .mobile-toggle { display: block; }
    .search-box { width: 180px; }

    .category-hero {
        padding: 28px;
    }

    .hero-bg-img {
        width: 60%;
    }

    .diy-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 14px;
    }

    .header-inner {
        height: 58px;
    }

    .search-box {
        display: none;
    }

    .category-hero {
        padding: 20px;
    }

    .category-stats {
        gap: 16px;
    }

    .stat-value {
        font-size: 17px;
    }

    .hero-bg-img {
        display: none;
    }

    .filter-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .sort-dropdown {
        width: 100%;
        justify-content: flex-between;
    }

    .recipe-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 12px;
    }

    .recipe-body {
        padding: 12px;
    }

    .recipe-title {
        font-size: 14px;
    }

    .recipe-desc {
        display: none;
    }

    .recipe-meta {
        font-size: 11px;
        padding-top: 8px;
    }

    .diy-steps {
        grid-template-columns: 1fr;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}