/* ============================================
   免疫性膀胱炎之家官网 - 主题样式
   配色：浅蓝 #5BA3C9 + 浅绿 #5DB88A
   ============================================ */

:root {
    --color-primary:        #5BA3C9;
    --color-primary-light:  #E8F4FD;
    --color-primary-dark:   #3A7FA5;
    --color-secondary:      #5DB88A;
    --color-secondary-light:#E8F6F3;
    --color-secondary-dark: #3A9B6A;
    --color-text:           #333333;
    --color-text-light:     #666666;
    --color-text-muted:     #999999;
    --color-bg:             #FFFFFF;
    --color-bg-gray:        #F5F9FC;
    --color-border:         #D8EAF4;
    --color-white:          #FFFFFF;
    --font-main:            'Segoe UI', 'Microsoft YaHei', sans-serif;
    --transition:           all 0.3s ease;
    --radius:               8px;
    --shadow:               0 4px 20px rgba(91,163,201,0.12);
    --shadow-hover:         0 8px 30px rgba(91,163,201,0.25);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 15px;
}

a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); text-decoration: none; }

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

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f0f0f0; }
::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 3px; }

/* ============================================
   顶部公告栏
   ============================================ */
.top-notice {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.9);
    font-size: 13px;
    padding: 6px 0;
}
.top-notice a { color: rgba(255,255,255,0.8); }
.top-notice a:hover { color: #fff; }

/* ============================================
   导航栏
   ============================================ */
.navbar-main {
    background: #fff;
    box-shadow: 0 2px 15px rgba(91,163,201,0.15);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-main .navbar-brand {
    padding: 12px 0;
}

.navbar-main .navbar-brand img {
    height: 45px;
}

.navbar-main .brand-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.2;
}

.navbar-main .brand-text span {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: var(--color-text-muted);
}

.navbar-main .nav-link {
    color: var(--color-text) !important;
    font-size: 15px;
    font-weight: 500;
    padding: 20px 16px !important;
    position: relative;
    transition: var(--transition);
}

.navbar-main .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px 2px 0 0;
    transition: width 0.3s ease;
}

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

.navbar-main .nav-link:hover::after,
.navbar-main .nav-link.active::after {
    width: calc(100% - 32px);
}

.navbar-toggler {
    border-color: var(--color-primary) !important;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%235BA3C9' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* PC端一级菜单悬停展开二级菜单（手机端保持点击展开） */
@media (min-width: 992px) {
    .navbar-main .nav-item.dropdown:hover > .dropdown-menu {
        display: block;
        margin-top: 0;
    }
}

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

.hero-slider .swiper-slide {
    position: relative;
    height: 520px;
}

@media (max-width: 768px) {
    .hero-slider .swiper-slide { height: 300px; }
}

.hero-slider .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-slider .slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(58,127,165,0.75) 0%, rgba(58,155,106,0.55) 100%);
    display: flex;
    align-items: center;
}

.hero-slider .slide-content {
    color: #fff;
    max-width: 650px;
}

.hero-slider .slide-content h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.3;
}

.hero-slider .slide-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 24px;
}

@media (max-width: 768px) {
    .hero-slider .slide-content h2 { font-size: 1.4rem; }
    .hero-slider .slide-content p { font-size: 0.9rem; }
}

.swiper-pagination-bullet { background: #fff !important; opacity: 0.6; }
.swiper-pagination-bullet-active { background: #fff !important; opacity: 1; width: 24px !important; border-radius: 4px !important; }

.swiper-button-next,
.swiper-button-prev {
    color: #fff !important;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    width: 44px !important;
    height: 44px !important;
}

.swiper-button-next::after,
.swiper-button-prev::after { font-size: 16px !important; }

/* ============================================
   按钮
   ============================================ */
.btn-primary-custom {
    background: var(--color-primary);
    color: #fff;
    border: 2px solid var(--color-primary);
    border-radius: 25px;
    padding: 10px 28px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary-custom:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(91,163,201,0.4);
}

.btn-secondary-custom {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.8);
    border-radius: 25px;
    padding: 10px 28px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-secondary-custom:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    transform: translateY(-2px);
}

.btn-outline-primary {
    color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
}
.btn-outline-primary:hover {
    background: var(--color-primary) !important;
    color: #fff !important;
}

/* ============================================
   通用区块
   ============================================ */
.section { padding: 70px 0; }
.section-gray { background: var(--color-bg-gray); }
.section-primary { background: var(--color-primary-light); }

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
}

.section-title p {
    color: var(--color-text-light);
    margin-top: 18px;
    font-size: 0.95rem;
}

/* ============================================
   卡片组件
   ============================================ */
.card-custom {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-border);
    height: 100%;
}

.card-custom:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary);
}

.card-custom .card-img-wrap {
    overflow: hidden;
    height: 200px;
}

.card-custom .card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.card-custom:hover .card-img-wrap img {
    transform: scale(1.06);
}

.card-custom .card-body-custom {
    padding: 20px;
}

.card-custom .card-tag {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 12px;
    margin-bottom: 10px;
}

.card-custom h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-custom p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}

.card-meta {
    font-size: 12px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-meta i { margin-right: 4px; }

/* ============================================
   快捷入口块
   ============================================ */
.quick-entry-wrap {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}

.quick-entry-item {
    text-align: center;
    padding: 24px 12px;
    border-radius: var(--radius);
    background: #fff;
    border: 2px solid var(--color-border);
    transition: var(--transition);
    color: var(--color-text);
}

.quick-entry-item:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.quick-entry-item i {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 10px;
    display: block;
}

.quick-entry-item span {
    font-size: 0.88rem;
    font-weight: 600;
}

/* ============================================
   推荐内容区块
   ============================================ */
.recommend-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.recommend-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow);
}

.recommend-item .icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.recommend-item .icon-box i {
    font-size: 1.6rem;
    color: var(--color-primary);
}

.recommend-item .text-box h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.recommend-item .text-box p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin: 0;
}

/* ============================================
   侧边栏
   ============================================ */
.sidebar-widget {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    overflow: hidden;
    margin-bottom: 24px;
}

.sidebar-widget .widget-title {
    background: var(--color-primary);
    color: #fff;
    padding: 12px 18px;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
}

.sidebar-widget .widget-body {
    padding: 16px;
}

.category-list { list-style: none; padding: 0; margin: 0; }
.category-list li {
    border-bottom: 1px solid var(--color-border);
    padding: 0;
}
.category-list li:last-child { border-bottom: none; }
.category-list li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    color: var(--color-text);
    font-size: 0.9rem;
    transition: var(--transition);
}
.category-list li a:hover,
.category-list li.active a {
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding-left: 20px;
}
.category-list li a .count {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 28px;
    text-align: center;
}

.sidebar-article-item {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}
.sidebar-article-item:last-child { border-bottom: none; }
.sidebar-article-item img {
    width: 60px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}
.sidebar-article-item .info h6 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}
.sidebar-article-item .info span {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ============================================
   页面 Banner（内页顶部）
   ============================================ */
.page-banner {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary-dark) 100%);
    padding: 55px 0 45px;
    color: #fff;
    text-align: center;
}

.page-banner h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-banner .breadcrumb {
    background: transparent;
    justify-content: center;
    margin: 0;
}

.page-banner .breadcrumb-item,
.page-banner .breadcrumb-item a {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
}

.page-banner .breadcrumb-item.active { color: #fff; }
.page-banner .breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,0.5); }

/* ============================================
   文章正文
   ============================================ */
.article-content {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--color-border);
}

.article-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 28px;
    font-size: 0.88rem;
    color: var(--color-text-muted);
}

.article-meta span i { margin-right: 4px; color: var(--color-primary); }

.article-body {
    color: var(--color-text);
    line-height: 1.9;
    font-size: 15px;
}

.article-body h2, .article-body h3, .article-body h4 {
    color: var(--color-primary-dark);
    margin: 28px 0 14px;
    font-weight: 600;
}

.article-body h2 { font-size: 1.25rem; border-left: 4px solid var(--color-primary); padding-left: 12px; }
.article-body h3 { font-size: 1.1rem; }

.article-body p { margin-bottom: 16px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 16px; }
.article-body li { margin-bottom: 8px; }

.article-body blockquote {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    padding: 14px 18px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 20px 0;
    color: var(--color-text-light);
}

.article-body img { border-radius: var(--radius); margin: 12px 0; }

.article-body table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.article-body table th { background: var(--color-primary); color: #fff; padding: 10px 14px; }
.article-body table td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); }
.article-body table tr:hover td { background: var(--color-primary-light); }

/* ============================================
   分页
   ============================================ */
.pagination .page-item .page-link {
    color: var(--color-primary);
    border-color: var(--color-border);
    margin: 0 2px;
    border-radius: 6px !important;
}

.pagination .page-item.active .page-link {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.pagination .page-item .page-link:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

/* ============================================
   Tab 切换
   ============================================ */
.nav-tabs-custom {
    border-bottom: 2px solid var(--color-border);
    gap: 4px;
}

.nav-tabs-custom .nav-link {
    border: none !important;
    border-radius: var(--radius) var(--radius) 0 0 !important;
    color: var(--color-text-light);
    padding: 10px 22px;
    font-weight: 500;
    background: var(--color-bg-gray);
    transition: var(--transition);
}

.nav-tabs-custom .nav-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.nav-tabs-custom .nav-link.active {
    background: var(--color-primary) !important;
    color: #fff !important;
    border-bottom: 2px solid var(--color-primary) !important;
}

/* ============================================
   患者信息卡（案例详情）
   ============================================ */
.patient-info-card {
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
}

.patient-info-card .info-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.patient-info-card table td {
    padding: 6px 12px;
    font-size: 0.9rem;
    border: none;
}

.patient-info-card table td:first-child {
    font-weight: 600;
    color: var(--color-text-light);
    white-space: nowrap;
}

/* ============================================
   联系页面
   ============================================ */
.contact-info-card {
    background: var(--color-primary-light);
    border-radius: var(--radius);
    padding: 32px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-item .contact-icon {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.contact-item .contact-text h6 {
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.contact-item .contact-text p {
    color: var(--color-text-light);
    margin: 0;
    font-size: 0.9rem;
}

.contact-form {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
}

.contact-form .form-control {
    border-color: var(--color-border);
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.contact-form .form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(91,163,201,0.15);
}

.contact-form .btn-submit {
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 25px;
    padding: 12px 36px;
    font-weight: 600;
    font-size: 0.95rem;
    width: 100%;
    transition: var(--transition);
}

.contact-form .btn-submit:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(91,163,201,0.35);
}

/* ============================================
   视频区块
   ============================================ */
.video-section {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
    padding: 70px 0;
    color: #fff;
}

.video-wrap {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.video-wrap img {
    width: 100%;
    display: block;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.2);
    border: 3px solid #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.8rem;
    transition: var(--transition);
    cursor: pointer;
}

.video-play-btn:hover {
    background: rgba(255,255,255,0.35);
    transform: translate(-50%, -50%) scale(1.1);
}

/* ============================================
   置顶标签
   ============================================ */
.badge-top {
    background: var(--color-secondary);
    color: #fff;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    margin-right: 8px;
}

.badge-recommend {
    background: var(--color-primary);
    color: #fff;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    margin-right: 8px;
}

/* ============================================
   新闻列表
   ============================================ */
.news-list-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.news-list-item:last-child { border-bottom: none; }

.news-list-item .news-img {
    width: 150px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.news-list-item .news-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-list-item:hover .news-info h4 { color: var(--color-primary); }

.news-list-item .news-info p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
}

@media (max-width: 576px) {
    .news-list-item { flex-direction: column; }
    .news-list-item .news-img { width: 100%; height: 180px; }
}

/* ============================================
   上下篇导航
   ============================================ */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 32px;
}

.article-nav-item {
    flex: 1;
    padding: 14px 18px;
    background: var(--color-bg-gray);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    font-size: 0.88rem;
}

.article-nav-item:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.article-nav-item .nav-label {
    color: var(--color-text-muted);
    font-size: 12px;
    margin-bottom: 4px;
}

.article-nav-item .nav-title {
    color: var(--color-text);
    font-weight: 600;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   告示栏 / 免责声明
   ============================================ */
.disclaimer-bar {
    background: #fff8e1;
    border-top: 1px solid #ffe082;
    padding: 10px 0;
    font-size: 13px;
    color: #7b6300;
    text-align: center;
}

.disclaimer-bar i { margin-right: 6px; color: #f9a825; }

/* ============================================
   页脚
   ============================================ */
.footer-main {
    background: #1a3a4a;
    color: rgba(255,255,255,0.75);
    padding: 55px 0 0;
}

.footer-main h5 {
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-main h5::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 35px;
    height: 2px;
    background: var(--color-secondary);
}

.footer-main a {
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
    line-height: 2.2;
    display: block;
    transition: var(--transition);
}

.footer-main a:hover { color: var(--color-secondary); padding-left: 6px; }

.footer-main p { font-size: 0.88rem; line-height: 1.8; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 16px 0;
    margin-top: 40px;
    font-size: 13px;
    text-align: center;
    color: rgba(255,255,255,0.45);
}

.footer-bottom a { color: rgba(255,255,255,0.55); display: inline; }
.footer-bottom a:hover { color: var(--color-secondary); padding-left: 0; }

/* ============================================
   返回顶部
   ============================================ */
#back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(91,163,201,0.4);
    transition: var(--transition);
    z-index: 999;
    text-decoration: none;
}

#back-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ============================================
   AI 诊断脉冲动画（移动端圆形入口使用）
   ============================================ */
@keyframes ai-pulse {
    0% { box-shadow: 0 0 0 0 rgba(238, 90, 111, 0.4); }
    70% { box-shadow: 0 0 0 12px rgba(238, 90, 111, 0); }
    100% { box-shadow: 0 0 0 0 rgba(238, 90, 111, 0); }
}

#aiDiagnosisModal .modal-title {
    font-weight: 600;
    color: var(--color-primary-dark);
}

#aiDiagnosisModal .ai-icon-lg {
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    background: rgba(91, 163, 201, 0.1);
    color: var(--color-primary);
    font-size: 2.2rem;
    display: inline-block;
}

#aiDiagnosisModal .ai-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#aiDiagnosisModal .ai-option-btn {
    text-align: left;
    padding: 12px 16px;
    border-radius: 10px;
    border-width: 1.5px;
    transition: all 0.2s;
}

#aiDiagnosisModal .ai-option-btn:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

#aiDiagnosisModal .ai-loading-box {
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#aiDiagnosisModal .ai-result-icon {
    width: 70px;
    height: 70px;
    line-height: 70px;
    border-radius: 50%;
    background: rgba(91, 163, 201, 0.1);
    color: var(--color-primary);
    font-size: 2rem;
    display: inline-block;
}

#aiDiagnosisModal .ai-result-icon.text-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #f0ad4e;
}

#aiDiagnosisModal .ai-result-icon.text-danger {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

#aiDiagnosisModal .ai-result-icon.text-success {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

#aiDiagnosisModal .ai-result-icon.text-info {
    background: rgba(23, 162, 184, 0.1);
    color: #17a2b8;
}

#aiDiagnosisModal .ai-percent {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

#aiDiagnosisModal .ai-result-box p {
    line-height: 1.8;
}

@media (max-width: 767px) {
    #back-top {
        bottom: 24px;
        right: 16px;
        width: 40px;
        height: 40px;
    }
}

/* ============================================
   空状态提示
   ============================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-state i { font-size: 3rem; margin-bottom: 16px; display: block; opacity: 0.4; }
.empty-state p { font-size: 0.9rem; }

/* ============================================
   响应式调整
   ============================================ */
@media (max-width: 991px) {
    .section { padding: 50px 0; }
    .navbar-main .nav-link { padding: 12px 16px !important; }
    .navbar-main .nav-link::after { display: none; }
}

@media (max-width: 767px) {
    .section { padding: 36px 0; }
    .section-title h2 { font-size: 1.5rem; }
    .article-content { padding: 18px; }
    .contact-form { padding: 20px; }
    .article-nav { flex-direction: column; }
}

/* ============================================
   PDF下载按钮
   ============================================ */
.article-actions { margin: 15px 0; }
.article-actions .btn { font-size: 0.85rem; }
@media print {
    .article-actions, .sidebar-widget, .article-nav, .page-banner, 
    .footer-main, .navbar, .disclaimer-bar, .breadcrumb { display: none !important; }
    .article-body { color: #000; }
}

/* ============================================
   分页样式
   ============================================ */
.pagination {
    gap: 6px;
}

.pagination .page-item .page-link {
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-weight: 500;
    min-width: 38px;
    text-align: center;
    transition: var(--transition);
}

.pagination .page-item .page-link:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.pagination .page-item.active .page-link {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.pagination .page-item.disabled .page-link {
    color: var(--color-text-light);
    background: #f8f9fa;
    border-color: var(--color-border);
}

/* ============================================
   首页右侧悬浮工具栏（公众号 + AI 诊断）
   ============================================ */
.right-float-tools {
    position: fixed;
    right: 0;
    top: 40%;
    transform: translateY(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.right-float-tools > * {
    align-self: stretch;
}

.right-float-tools .wechat-qrcode-tab,
.right-float-tools #ai-diagnosis,
.right-float-tools #message-entry {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #fff;
    padding: 14px 8px;
    border-radius: 10px 0 0 10px;
    cursor: pointer;
    font-size: 13px;
    line-height: 1.2;
    box-shadow: -2px 2px 10px rgba(0,0,0,.12);
    transition: var(--transition);
    text-decoration: none;
    width: 100%;
}

.right-float-tools .wechat-qrcode-tab:hover,
.right-float-tools #ai-diagnosis:hover,
.right-float-tools #message-entry:hover {
    background: var(--color-primary-dark);
    transform: none;
}

.right-float-tools .wechat-qrcode-tab i,
.right-float-tools #ai-diagnosis i,
.right-float-tools #message-entry i {
    font-size: 20px;
    margin-bottom: 6px;
}

@media (max-width: 767px) {
    .right-float-tools {
        top: auto;
        bottom: 76px;
        right: 16px;
        transform: none;
        gap: 0;
    }
    .right-float-tools .wechat-qrcode-tab,
    .right-float-tools #ai-diagnosis,
    .right-float-tools #message-entry {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        padding: 0;
        font-size: 1rem;
        background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
        box-shadow: 0 4px 15px rgba(238, 90, 111, 0.4);
        animation: ai-pulse 2s infinite;
    }
    .right-float-tools .wechat-qrcode-tab:hover,
    .right-float-tools #ai-diagnosis:hover,
    .right-float-tools #message-entry:hover {
        transform: translateY(-4px) scale(1.05);
        box-shadow: 0 6px 20px rgba(238, 90, 111, 0.5);
    }
    .right-float-tools .wechat-qrcode-tab i,
    .right-float-tools #ai-diagnosis i,
    .right-float-tools #message-entry i {
        font-size: 1rem;
        margin-bottom: 0;
    }
    .right-float-tools .wechat-qrcode-tab span,
    .right-float-tools #ai-diagnosis span,
    .right-float-tools #message-entry span {
        display: none;
    }
}

/* ============================================
   互动留言板
   ============================================ */
.message-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message-list > .message-item {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
    border: 1px solid var(--color-border);
}

.message-main {
    display: flex;
    gap: 14px;
}

.message-avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(91, 163, 201, 0.12);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.message-body {
    flex: 1;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.message-nickname {
    font-weight: 600;
    color: var(--color-primary-dark);
}

.message-time {
    font-size: .8rem;
    color: var(--color-text-light);
}

.message-content {
    color: var(--color-text);
    line-height: 1.7;
    word-break: break-word;
}

.message-actions {
    margin-top: 10px;
}

.message-actions a {
    color: var(--color-primary);
    font-size: .85rem;
    text-decoration: none;
}

.message-actions a:hover {
    text-decoration: underline;
}

.message-replies {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-left: 24px;
}

.message-replies .message-item {
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.message-replies .message-item .message-avatar {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
    background: rgba(91, 163, 201, 0.08);
}

.message-replies .message-replies {
    border-top: none;
    padding-top: 0;
    margin-top: 12px;
}

@media (max-width: 767px) {
    .message-replies {
        padding-left: 12px;
    }
}

/* ============================================
   首页站点数据统计条
   ============================================ */
.site-stats-bar {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 20px rgba(0,0,0,.05);
}

.stat-item {
    padding: 16px 10px;
    border-radius: 12px;
    transition: var(--transition);
}

.stat-item:hover {
    background: var(--color-primary-light);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-label {
    font-size: .9rem;
    color: var(--color-text-light);
}

.stat-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.stat-link:hover {
    color: inherit;
}

@media (max-width: 767px) {
    .stat-number {
        font-size: 1.5rem;
    }
    .stat-label {
        font-size: .8rem;
    }
}