/**
 * 中医肾病专科馆 - 中式国风样式
 * 主色调：中国红 #C41E3A + 古风浅黄 #F5E6C8
 * 
 * @package zhenshengtang
 * @version 1.0
 */

/* ============================================
   CSS变量定义
   ============================================ */
:root {
    /* 主色调 */
    --color-primary: #C41E3A;      /* 中国红 */
    --color-primary-dark: #8B0000; /* 深红 */
    --color-primary-light: #E8505B;
    
    /* 辅助色 */
    --color-secondary: #F5E6C8;    /* 古风浅黄 */
    --color-secondary-dark: #E8D4A8;
    --color-secondary-light: #FAF3E3;
    
    /* 中性色 */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-border: #E0D5C0;
    --color-bg: #FFFEF7;
    
    /* 字体 */
    --font-base: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    --font-title: "STKaiti", "KaiTi", "Microsoft YaHei", serif;
    
    /* 间距 */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 50px;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}

/* ============================================
   基础重置
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s;
}

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

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

ul, ol {
    list-style: none;
}

/* ============================================
   布局容器
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   顶部导航
   ============================================ */
.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-family: var(--font-title);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
    letter-spacing: 2px;
}

/* 主导航 */
.main-nav {
    display: flex;
}

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

.main-nav a {
    display: block;
    padding: 8px 16px;
    color: rgba(255,255,255,0.9);
    font-size: 15px;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.main-nav .nav-btn {
    background: var(--color-secondary);
    color: var(--color-primary);
    font-weight: bold;
}

.main-nav .nav-btn:hover {
    background: #fff;
}

/* 下拉菜单 */
.has-submenu {
    position: relative;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 140px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    padding: 10px 0;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu a {
    color: var(--color-text);
    padding: 8px 20px;
}

.submenu a:hover {
    background: var(--color-secondary-light);
    color: var(--color-primary);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    z-index: 1002;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: #fff;
    transition: all 0.3s;
}

/* 移动端导航 */
.mobile-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-primary);
    padding: 20px;
    z-index: 1001;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.mobile-nav a {
    display: block;
    padding: 12px 0;
    color: rgba(255,255,255,0.9);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mobile-nav .btn-appointment {
    background: var(--color-secondary);
    color: var(--color-primary);
    text-align: center;
    border-radius: var(--radius-md);
    margin-top: 10px;
}

/* ============================================
   Banner轮播
   ============================================ */
.banner-slider {
    position: relative;
    overflow: hidden;
}

.banner-wrapper {
    position: relative;
}

.banner-slide {
    display: none;
    position: relative;
}

.banner-slide.active {
    display: block;
}

.banner-slide img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.banner-title {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(196, 30, 58, 0.85);
    color: #fff;
    padding: 15px 40px;
    font-family: var(--font-title);
    font-size: 28px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ============================================
   页面Banner
   ============================================ */
.page-banner {
    position: relative;
    height: 320px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.page-banner .banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.page-banner .banner-bg.default-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.page-banner .banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.5) 100%);
}

.page-banner .banner-content {
    position: relative;
    z-index: 1;
    width: 100%;
    padding: var(--spacing-lg) 0;
}

.page-banner .page-title {
    font-family: var(--font-title);
    font-size: 42px;
    color: #fff;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.page-banner .breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    background: transparent;
    padding: 0;
}

.page-banner .breadcrumb a {
    color: rgba(255,255,255,0.9);
}

.page-banner .breadcrumb a:hover {
    color: var(--color-secondary);
}

.page-banner .breadcrumb .separator {
    color: rgba(255,255,255,0.5);
}

.page-banner .breadcrumb .current {
    color: var(--color-secondary);
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.banner-dots .dot {
    width: 12px;
    height: 12px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

.banner-dots .dot.active {
    background: #fff;
    transform: scale(1.2);
}

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.3);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(255,255,255,0.6);
}

.banner-prev { left: 20px; }
.banner-next { right: 20px; }

.banner-prev::before,
.banner-next::before {
    content: '';
    display: block;
    width: 15px;
    height: 15px;
    border-left: 3px solid var(--color-primary);
    border-bottom: 3px solid var(--color-primary);
    margin: auto;
}

.banner-prev::before {
    transform: rotate(45deg);
    margin-left: 18px;
}

.banner-next::before {
    transform: rotate(-135deg);
    margin-right: 18px;
}

/* ============================================
   通用区块
   ============================================ */
.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-title);
    font-size: 36px;
    color: var(--color-primary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    font-weight: 600;
}

.section-title::before,
.section-title::after {
    content: '❖';
    color: var(--color-secondary-dark);
    margin: 0 15px;
    font-size: 18px;
    vertical-align: middle;
}

.section-subtitle {
    color: var(--color-text-light);
    font-size: 16px;
    letter-spacing: 2px;
}

.section-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.3);
    border: none;
    cursor: pointer;
}

.btn-more::after {
    content: '→';
    transition: transform 0.3s ease;
}

.btn-more:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #8B0000 100%);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(196, 30, 58, 0.4);
}

.btn-more:hover::after {
    transform: translateX(5px);
}

/* ============================================
   医师团队
   ============================================ */
.doctors-section {
    background: var(--color-secondary-light);
}

.doctor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.doctor-card-small {
    background: linear-gradient(145deg, #ffffff 0%, #fdfcfa 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(196, 30, 58, 0.08);
    position: relative;
    overflow: hidden;
}

.doctor-card-small::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.doctor-card-small:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 50px rgba(196, 30, 58, 0.12);
    border-color: rgba(196, 30, 58, 0.2);
}

.doctor-card-small:hover::before {
    transform: scaleX(1);
}

.doctor-avatar {
    width: 130px;
    height: 130px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid transparent;
    background: linear-gradient(135deg, var(--color-secondary), #e8d4a8) padding-box,
                linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)) border-box;
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.15);
    position: relative;
}

.doctor-avatar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.5);
    pointer-events: none;
}

.doctor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #6b0f1a 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 52px;
    font-family: var(--font-title);
}

.doctor-name {
    font-family: var(--font-title);
    font-size: 20px;
    color: var(--color-text);
    margin-bottom: 5px;
}

.doctor-title {
    color: var(--color-primary);
    font-size: 14px;
    margin-bottom: 10px;
}

.doctor-specialty {
    color: var(--color-text-light);
    font-size: 13px;
    margin-bottom: 15px;
}

.btn-detail {
    display: inline-block;
    padding: 8px 20px;
    background: var(--color-secondary);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    transition: all 0.3s;
}

.btn-detail:hover {
    background: var(--color-primary);
    color: #fff;
}

/* ============================================
   医馆简介
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text .section-title {
    text-align: left;
}

.about-desc {
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: var(--spacing-lg);
}

.image-frame {
    border: 8px solid var(--color-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-frame img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

/* 医馆环境轮播 */
.gallery-carousel {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.carousel-track {
    width: 100%;
    height: 100%;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-carousel .carousel-dots {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 5;
}

.gallery-carousel .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: all 0.3s;
}

.gallery-carousel .dot.active {
    background: #fff;
    transform: scale(1.2);
}

/* ============================================
   诊疗步骤
   ============================================ */
.steps-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
}

.steps-section .section-title {
    color: #fff;
}

.steps-section .section-title::before,
.steps-section .section-title::after {
    color: rgba(255,255,255,0.5);
}

.steps-section .section-subtitle {
    color: rgba(255,255,255,0.8);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
}

.step-item {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: linear-gradient(145deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
    border-radius: var(--radius-lg);
    position: relative;
    border: 1px solid rgba(245, 230, 200, 0.2);
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
}

.step-item:hover {
    background: linear-gradient(145deg, rgba(255,255,255,0.25) 0%, rgba(255,255,255,0.1) 100%);
    transform: translateY(-5px);
    border-color: rgba(245, 230, 200, 0.4);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, #fff 0%, #fff5e6 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    font-size: 42px;
    line-height: 1;
}

.step-item h3 {
    font-family: var(--font-title);
    font-size: 18px;
    margin-bottom: 10px;
}

.step-item p {
    font-size: 13px;
    color: rgba(255,255,255,0.8);
}

/* ============================================
   肾病专区
   ============================================ */
.kidney-section {
    background: var(--color-secondary-light);
}

.kidney-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.kidney-card {
    background: linear-gradient(145deg, #ffffff 0%, #faf8f3 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    box-shadow: 0 4px 20px rgba(196, 30, 58, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(196, 30, 58, 0.1);
    position: relative;
    overflow: hidden;
}

.kidney-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.kidney-card:hover {
    border-color: rgba(196, 30, 58, 0.3);
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(196, 30, 58, 0.15);
}

.kidney-card:hover::before {
    transform: scaleX(1);
}

.kidney-card .card-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #6b0f1a 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-family: var(--font-title);
    font-weight: bold;
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.3);
    position: relative;
    z-index: 1;
}

.kidney-card .card-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, transparent 50%);
    top: 0;
    left: 0;
}

.kidney-card h3 {
    font-family: var(--font-title);
    font-size: 20px;
    color: var(--color-text);
    margin-bottom: 10px;
}

.kidney-card p {
    color: var(--color-text-light);
    font-size: 14px;
}

/* ============================================
   医馆动态
   ============================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.news-card {
    background: linear-gradient(145deg, #ffffff 0%, #fdfcfa 100%);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(196, 30, 58, 0.08);
    position: relative;
}

.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    transform: scaleX(0);
    transition: transform 0.4s ease;
    z-index: 1;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 50px rgba(196, 30, 58, 0.12);
    border-color: rgba(196, 30, 58, 0.15);
}

.news-card:hover::before {
    transform: scaleX(1);
}

.news-thumb {
    height: 180px;
    overflow: hidden;
    position: relative;
}

.news-thumb::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.2) 100%);
    pointer-events: none;
}

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

.news-card:hover .news-thumb img {
    transform: scale(1.1);
}

.news-content {
    padding: var(--spacing-lg);
}

.news-date {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #e8d4a8 100%);
    color: var(--color-primary);
    font-size: 12px;
    border-radius: 20px;
    font-weight: 500;
}

.news-content h3 {
    font-size: 16px;
    margin-top: 12px;
    line-height: 1.5;
    font-weight: 500;
}

.news-content h3 a {
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content h3 a:hover {
    color: var(--color-primary);
}

/* ============================================
   预约横幅
   ============================================ */
.appointment-section {
    padding: 0;
}

.appointment-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 60px;
    text-align: center;
    color: #fff;
}

.appointment-banner h2 {
    font-family: var(--font-title);
    font-size: 36px;
    margin-bottom: 15px;
}

.appointment-banner p {
    font-size: 18px;
    margin-bottom: 25px;
    color: rgba(255,255,255,0.9);
}

.btn-appointment {
    display: inline-block;
    padding: 15px 40px;
    background: var(--color-secondary);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s;
}

.btn-appointment:hover {
    background: #fff;
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   页面Banner
   ============================================ */
.page-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.page-banner.small {
    padding: 40px 0;
}

.page-banner h1 {
    font-family: var(--font-title);
    font-size: 36px;
    margin-bottom: 10px;
}

.page-banner p {
    font-size: 16px;
    color: rgba(255,255,255,0.9);
}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb {
    background: var(--color-secondary-light);
    padding: 15px 0;
    font-size: 14px;
    color: var(--color-text-light);
}

/* 页面Banner内的面包屑样式重置 */
.page-banner .breadcrumb {
    background: transparent;
    padding: 0;
}

.breadcrumb a {
    color: var(--color-text-light);
}

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

/* ============================================
   页面内容
   ============================================ */
.page-content {
    padding: var(--spacing-xl) 0;
}

.content-wrapper {
    background: #fff;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.rich-content {
    line-height: 2;
}

.rich-content h2,
.rich-content h3 {
    font-family: var(--font-title);
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.rich-content p {
    margin-bottom: var(--spacing-md);
}

.rich-content img {
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

/* ============================================
   文章列表
   ============================================ */
.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-item {
    display: flex;
    gap: var(--spacing-lg);
    background: linear-gradient(145deg, #ffffff 0%, #fdfcfa 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(196, 30, 58, 0.08);
    position: relative;
    overflow: hidden;
}

.article-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-primary), var(--color-primary-dark));
    transform: scaleY(0);
    transition: transform 0.4s ease;
}

.article-item:hover {
    box-shadow: 0 12px 40px rgba(196, 30, 58, 0.12);
    transform: translateX(5px);
    border-color: rgba(196, 30, 58, 0.15);
}

.article-item:hover::before {
    transform: scaleY(1);
}

.article-thumb {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    position: relative;
}

.article-thumb::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
}

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

.article-item:hover .article-thumb img {
    transform: scale(1.08);
}

.article-content {
    flex: 1;
}

.article-title {
    font-size: 18px;
    margin-bottom: 10px;
}

.article-title a {
    color: var(--color-text);
}

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

.article-category {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
}

.article-summary {
    color: var(--color-text-light);
    font-size: 14px;
    margin-bottom: 10px;
}

.article-meta {
    font-size: 13px;
    color: var(--color-text-muted);
}

.article-meta span {
    margin-right: 15px;
}

/* ============================================
   医师详情
   ============================================ */
.doctor-detail {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.doctor-header {
    display: flex;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.doctor-photo {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 4px solid var(--color-secondary);
}

.doctor-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.doctor-info {
    flex: 1;
}

.doctor-info .doctor-name {
    font-size: 28px;
    margin-bottom: 10px;
}

.doctor-info .doctor-title {
    font-size: 16px;
    margin-bottom: 15px;
}

.doctor-info .doctor-specialty {
    font-size: 15px;
    margin-bottom: 20px;
}

.doctor-intro h2 {
    font-family: var(--font-title);
    font-size: 20px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.intro-content {
    line-height: 2;
    color: var(--color-text-light);
}

/* ============================================
   文章详情
   ============================================ */
.article-detail {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.article-header {
    text-align: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.article-detail .article-title {
    font-family: var(--font-title);
    font-size: 28px;
    color: var(--color-text);
    margin-bottom: 15px;
}

.article-detail .article-meta {
    font-size: 14px;
}

.article-content {
    line-height: 2;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.article-nav a {
    color: var(--color-text-light);
}

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

.article-nav span {
    font-size: 13px;
    color: var(--color-text-muted);
}

.article-nav p {
    margin-top: 5px;
}

/* ============================================
   侧边栏布局
   ============================================ */
.content-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-lg);
}

.sidebar {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    height: fit-content;
}

.sidebar-widget {
    margin-bottom: var(--spacing-md);
}

.widget-title {
    font-family: var(--font-title);
    font-size: 18px;
    color: var(--color-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
    margin-bottom: 15px;
}

.category-list li {
    margin-bottom: 5px;
}

.category-list a {
    display: block;
    padding: 10px 15px;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.category-list a:hover,
.category-list li.active a {
    background: var(--color-secondary-light);
    color: var(--color-primary);
}

/* ============================================
   相册
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: #fff;
    padding: 30px 15px 15px;
    font-size: 14px;
}

.gallery-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.9);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.gallery-modal.active {
    display: flex;
}

.gallery-modal img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-md);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: #fff;
    background: none;
    border: none;
    cursor: pointer;
}

/* ============================================
   联系我们
   ============================================ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-lg);
}

.contact-map {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.info-card h3 {
    font-family: var(--font-title);
    font-size: 16px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.info-card p {
    color: var(--color-text-light);
    font-size: 14px;
    margin-bottom: 5px;
}

.qrcode-card img {
    width: 150px;
    margin-top: 10px;
}

/* ============================================
   预约表单
   ============================================ */
.appointment-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.appointment-form-wrapper {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.appointment-form-wrapper h2 {
    font-family: var(--font-title);
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.form-error {
    background: #fee;
    color: #c00;
    padding: 15px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--color-text);
    font-weight: 500;
}

.required {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.form-actions {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.btn-submit {
    padding: 15px 50px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-reset {
    padding: 15px 30px;
    background: var(--color-secondary);
    color: var(--color-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    cursor: pointer;
    margin-left: 15px;
    transition: all 0.3s;
}

.btn-reset:hover {
    background: var(--color-secondary-dark);
}

/* 预约成功 */
.appointment-success {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, #52c41a, #389e0d);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

.appointment-success h2 {
    font-family: var(--font-title);
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.appointment-success p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.submitted-info {
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.submitted-info h3 {
    font-family: var(--font-title);
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.submitted-info li {
    padding: 8px 0;
    border-bottom: 1px dashed var(--color-border);
}

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

.submitted-info span {
    color: var(--color-text-muted);
    margin-right: 10px;
}

.btn-retry {
    display: inline-block;
    padding: 12px 30px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
}

/* ============================================
   分页
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
    margin-top: var(--spacing-lg);
}

.pagination a,
.pagination span {
    display: inline-block;
    padding: 8px 15px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    transition: all 0.3s;
}

.pagination a:hover {
    background: var(--color-secondary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination .current {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.pagination .disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
}

/* ============================================
   底部
   ============================================ */
.site-footer {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.footer-logo img {
    height: 50px;
    margin-bottom: 15px;
}

.footer-logo h3 {
    font-family: var(--font-title);
    font-size: 22px;
    margin-bottom: 15px;
}

.footer-desc {
    color: rgba(255,255,255,0.8);
    margin-bottom: 15px;
}

.footer-contact p {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-nav h4 {
    font-family: var(--font-title);
    font-size: 16px;
    margin-bottom: 15px;
}

.footer-nav a {
    display: block;
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    margin-bottom: 10px;
    transition: all 0.3s;
}

.footer-nav a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer-qrcode h4 {
    font-family: var(--font-title);
    font-size: 16px;
    margin-bottom: 15px;
}

.footer-qrcode img {
    width: 120px;
    border-radius: var(--radius-sm);
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: rgba(255,255,255,0.8);
}

.footer-bottom {
    text-align: center;
    padding: var(--spacing-md) 0;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.footer-bottom p {
    margin-bottom: 5px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.7);
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-links {
    margin-top: 10px;
}

/* ============================================
   返回顶部
   ============================================ */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 100;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

.back-to-top i {
    display: block;
    width: 15px;
    height: 15px;
    border-left: 3px solid #fff;
    border-top: 3px solid #fff;
    transform: rotate(45deg);
    margin-top: 5px;
}

/* ============================================
   空状态
   ============================================ */
.empty-text {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .doctor-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .kidney-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .banner-slide img {
        height: 300px;
    }
    
    .banner-title {
        font-size: 20px;
        padding: 10px 25px;
        bottom: 30px;
    }
    
    .doctor-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .kidney-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .content-layout {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-group.full-width {
        grid-column: span 1;
    }
    
    .article-item {
        flex-direction: column;
    }
    
    .article-thumb {
        width: 100%;
        height: 180px;
    }
    
    .doctor-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-nav a:hover {
        padding-left: 0;
    }
    
    .footer-qrcode img,
    .qrcode-placeholder {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header-inner {
        height: 60px;
    }
    
    .mobile-nav {
        top: 60px;
        max-height: calc(100vh - 60px);
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .banner-slide img {
        height: 200px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .appointment-banner {
        padding: 40px 20px;
    }
    
    .appointment-banner h2 {
        font-size: 24px;
    }
    
    .page-banner h1 {
        font-size: 28px;
    }
}

/* ============================================
   肾病专区 - 分类标签栏
   ============================================ */
.kidney-cat-bar {
    background: var(--color-secondary-light);
    padding: var(--spacing-lg) 0;
    border-bottom: 2px solid var(--color-border);
}

.kidney-cat-list {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.kidney-cat-tag {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: #fff;
    border: 2px solid var(--color-border);
    border-radius: 50px;
    color: var(--color-text);
    font-size: 15px;
    transition: all 0.3s;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.kidney-cat-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kidney-cat-tag.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-color: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.kidney-cat-tag .tag-icon {
    width: 36px;
    height: 36px;
    background: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-weight: bold;
    font-size: 14px;
    color: var(--color-primary);
    flex-shrink: 0;
    transition: all 0.3s;
}

.kidney-cat-tag.active .tag-icon {
    background: rgba(255,255,255,0.25);
    color: #fff;
}

.kidney-cat-tag:hover .tag-icon {
    background: var(--color-primary);
    color: #fff;
}

.kidney-cat-tag.active:hover .tag-icon {
    background: rgba(255,255,255,0.25);
    color: #fff;
}

.kidney-cat-tag .tag-name {
    font-weight: 500;
}

/* 当前分类标题 */
.kidney-current-cat {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.kidney-current-cat h2 {
    font-family: var(--font-title);
    font-size: 26px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.kidney-current-cat p {
    color: var(--color-text-light);
    font-size: 15px;
}

/* 肾病专区标签响应式 */
@media (max-width: 768px) {
    .kidney-cat-list {
        gap: 10px;
    }
    
    .kidney-cat-tag {
        padding: 10px 18px;
        font-size: 14px;
    }
    
    .kidney-cat-tag .tag-icon {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .kidney-cat-list {
        flex-direction: column;
        align-items: stretch;
    }
    
    .kidney-cat-tag {
        justify-content: center;
    }
}

/* ============================================
   文章卡片网格样式
   ============================================ */
.article-grid {
    display: grid;
    gap: var(--spacing-lg);
}

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

.article-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.article-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.article-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    box-shadow: 0 12px 40px rgba(196, 30, 58, 0.15);
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.card-thumb {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
}

.card-thumb a {
    display: block;
    width: 100%;
    height: 100%;
}

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

.article-card:hover .card-thumb img {
    transform: scale(1.1);
}

.card-thumb-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-secondary-light) 0%, #f0f0f0 100%);
}

.placeholder-icon {
    font-size: 48px;
    opacity: 0.5;
}

.card-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-category {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(196, 30, 58, 0.1);
    color: var(--color-primary);
    font-size: 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    align-self: flex-start;
}

.card-title {
    font-size: 16px;
    margin-bottom: 10px;
    line-height: 1.4;
    flex: 1;
}

.card-title a {
    color: var(--color-text);
    transition: color 0.3s;
}

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

.card-summary {
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-muted);
    padding-top: 10px;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-meta i {
    color: var(--color-primary);
}

/* 响应式 - 文章卡片 */
@media (max-width: 1024px) {
    .article-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .article-grid-2,
    .article-grid-3,
    .article-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .card-thumb {
        height: 150px;
    }
}

@media (max-width: 480px) {
    .article-grid-2,
    .article-grid-3,
    .article-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .card-thumb {
        height: 180px;
    }
}