/* ==========================================================================
   ldcms2025 俄罗斯客户官网 前端展示优化样式表
   依据《网站优化评估报告》实施：
   1. 设计令牌与全站视觉统一（配色、间距、圆角、阴影、品牌色规范）
   2. 西里尔字符（俄语）排版深度适配（Open Sans / PT Sans、断词容错、30%宽度余量）
   3. PC 端 1440px 基准布局与 3 列/末行留白优化
   4. 手机端 320px~430px 全主流机型适配（产品优先上屏、分类折叠、横向无滚动、44px触控）
   5. 旅游行程模块（时间线结构化 D1/D2/D3 徽标、城市/交通/住宿/亮点标签、手风琴折叠）
   6. 视频模块（16:9 响应式、支持本地 MP4/WebM 与 YouTube / VK Video / Rutube 外链）
   7. 图片画廊模块（4:3 / 16:9 统一规格、缩略图联动、高清大图灯箱放大）
   8. 目的地展示与资讯攻略卡片组件（参考 visitspain.com.cn & russiantravell.cn）
   9. 纯产品展示定位（详情页核心聚焦、去除冗余营销弹窗）
   ========================================================================== */

/* --------------------------------------------------------------------------
   一、设计令牌 (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* 核心品牌色：国际旅游专业深蓝（稳重、信任、商务） */
    --primary-color: #1d4ed8;
    --primary-hover: #1e40af;
    --primary-dark: #0f2d80;
    --primary-light: #eff6ff;
    --primary-border: #bfdbfe;
    --primary-rgb: 29, 78, 216;

    /* 辅助色：俄式典雅暖红/金徽（用于重要标签、天数徽章与亮点提示） */
    --accent-color: #e11d48;
    --accent-hover: #be123c;
    --accent-light: #fff1f2;
    --accent-gold: #f59e0b;

    /* 中性文本色彩阶 */
    --text-strong: #0f172a;       /* 主标题、核心强调文本 */
    --text-body: #334155;         /* 正文、常规阅读文本 */
    --text-muted: #64748b;        /* 辅助信息、日期、次要说明 */
    --text-light: #94a3b8;        /* 占位符、边注 */

    /* 背景色彩阶 */
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --bg-alt: #f1f5f9;
    --bg-dark: #0f172a;

    /* 边框与分割线 */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --border-strong: #cbd5e1;

    /* 圆角规范 */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 18px;
    --radius-pill: 9999px;

    /* 阴影规范 */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.06);
    --shadow-card: 0 8px 24px -6px rgba(15, 23, 42, 0.08), 0 4px 8px -4px rgba(15, 23, 42, 0.03);
    --shadow-hover: 0 16px 36px -8px rgba(15, 23, 42, 0.14), 0 8px 16px -6px rgba(15, 23, 42, 0.06);

    /* 动效过渡 */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;

    /* 布局基准宽度 */
    --container-max: 1380px;
}

/* --------------------------------------------------------------------------
   二、西里尔字符字体与排版适配 (Cyrillic Typography)
   -------------------------------------------------------------------------- */
body {
    font-family: "Open Sans", "PT Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.68;
    color: var(--text-body);
    background-color: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 俄语长单词换行容错：避免排版溢出或挤出容器 */
h1, h2, h3, h4, h5, h6,
.product-item-title,
.product-item-info,
.card-title,
.card-text,
.procont_ltop h2,
.procont_lbot p,
.itinerary-day__title,
.destination-title,
.guide-title {
    overflow-wrap: anywhere;
    word-break: normal;
    hyphens: auto;
    letter-spacing: -0.01em;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-strong);
    font-weight: 700;
}

/* 全站横向滚动防御规范 */
html, body {
    overflow-x: hidden;
    width: 100%;
    position: relative;
    max-width: 100vw;
}

*, *::before, *::after {
    box-sizing: border-box;
}

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

/* 容器基准适配 (PC 1440px 基准，舒适两侧留白) */
@media (min-width: 1400px) {
    .container {
        max-width: var(--container-max);
    }
}

/* --------------------------------------------------------------------------
   三、沉浸式顶部透明导航栏 (Transparent-to-White Navbar)
   依据需求：
   - 初始位于页面顶部时：背景全透明，能清晰透出背后的横幅 Banner / 视频背景；
     文字、语言选择框、搜索/购物车图标保持明亮白皙，并带有抗眩光微阴影。
   - 页面向下滚动（scrollTop > 30px）时：平滑过渡为微晶高质感白底 (rgba(255, 255, 255, 0.98))，
     带有柔和投影与轻微毛玻璃模糊，文字与图标自然过渡为高对比度深色。
   -------------------------------------------------------------------------- */
.site-header {
    width: 100%;
    z-index: 1030;
    transition: background-color 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.35s ease,
                backdrop-filter 0.35s ease,
                height 0.3s ease;
}

.site-header .logo img {
    max-height: 46px;
    width: auto;
    object-fit: contain;
    transition: filter 0.3s ease;
}

/* 下拉三角指示器继承文字颜色且去白底背景 */
.site-header .nav-pc .menu-dropdown-icon > a::after {
    background: transparent !important;
    color: inherit !important;
}

/* PC 桌面端 (>= 992px) */
@media (min-width: 992px) {
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        height: 75px;
    }

    /* 1. 初始透明状态 (未滚动) */
    .site-header:not(.header-scrolled) {
        background: linear-gradient(180deg, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.25) 65%, transparent 100%) !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.14) !important;
        box-shadow: none !important;
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
    }

    .site-header:not(.header-scrolled) .logo img {
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
    }

    /* 一级导航文字颜色：白底防眩光 */
    .site-header:not(.header-scrolled) .nav-pc .menu > ul > li > a {
        color: #ffffff !important;
        text-shadow: 0 1px 3px rgba(0, 0, 0, 0.65);
        font-weight: 500;
        padding: 10px 16px;
        border-radius: var(--radius-sm);
        background: transparent !important;
        transition: color 0.2s ease, background-color 0.2s ease, text-shadow 0.2s ease;
    }

    .site-header:not(.header-scrolled) .nav-pc .menu > ul > li > a:hover {
        color: #93c5fd !important;
        background: rgba(255, 255, 255, 0.12) !important;
        text-shadow: 0 2px 6px rgba(0, 0, 0, 0.8);
    }

    .site-header:not(.header-scrolled) .nav-pc .menu > ul > li > a.active {
        color: #60a5fa !important;
        background: rgba(255, 255, 255, 0.18) !important;
        font-weight: 600;
        text-shadow: 0 2px 8px rgba(37, 99, 235, 0.6);
    }

    /* 语言切换器 */
    .site-header:not(.header-scrolled) .lang-wrapper .lang-btn {
        color: #ffffff !important;
        border-color: rgba(255, 255, 255, 0.45);
        background: rgba(255, 255, 255, 0.12);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
        transition: all 0.25s ease;
    }

    .site-header:not(.header-scrolled) .lang-wrapper .lang-btn:hover {
        background: rgba(255, 255, 255, 0.24);
        border-color: rgba(255, 255, 255, 0.75);
    }

    .site-header:not(.header-scrolled) .lang-wrapper .lang-icon {
        stroke: #ffffff !important;
    }

    .site-header:not(.header-scrolled) .lang-wrapper .lang-text {
        color: #ffffff !important;
    }

    /* 搜索与购物车图标 */
    .site-header:not(.header-scrolled) .search-icon {
        color: #ffffff !important;
        filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.65));
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .site-header:not(.header-scrolled) .search-icon:hover {
        transform: scale(1.1);
        color: #93c5fd !important;
    }

    .site-header:not(.header-scrolled) .cart svg path,
    .site-header:not(.header-scrolled) .cart svg rect {
        stroke: #ffffff !important;
        filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.65));
    }

    /* 2. 页面上滑后激活状态 (白底质感) */
    .site-header.header-scrolled {
        background: rgba(255, 255, 255, 0.98) !important;
        border-bottom: 1px solid rgba(226, 232, 240, 0.85) !important;
        box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.08) !important;
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .site-header.header-scrolled .logo img {
        filter: none;
    }

    .site-header.header-scrolled .nav-pc .menu > ul > li > a {
        color: var(--text-strong) !important;
        text-shadow: none !important;
        font-weight: 500;
        padding: 10px 16px;
        border-radius: var(--radius-sm);
        background: transparent !important;
        transition: color 0.2s ease, background-color 0.2s ease;
    }

    .site-header.header-scrolled .nav-pc .menu > ul > li > a:hover {
        color: var(--primary-color) !important;
        background-color: var(--primary-light) !important;
    }

    .site-header.header-scrolled .nav-pc .menu > ul > li > a.active {
        color: var(--primary-color) !important;
        background-color: var(--primary-light) !important;
        font-weight: 600;
    }

    .site-header.header-scrolled .lang-wrapper .lang-btn {
        color: var(--text-body);
        border-color: var(--border);
        background: #f8fafc;
        box-shadow: none;
        transition: all 0.25s ease;
    }

    .site-header.header-scrolled .lang-wrapper .lang-btn:hover {
        border-color: var(--primary-color);
        background: #ffffff;
    }

    .site-header.header-scrolled .lang-wrapper .lang-icon {
        stroke: var(--text-body) !important;
    }

    .site-header.header-scrolled .lang-wrapper .lang-text {
        color: var(--text-body) !important;
    }

    .site-header.header-scrolled .search-icon {
        color: var(--text-strong) !important;
        filter: none;
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .site-header.header-scrolled .search-icon:hover {
        transform: scale(1.1);
        color: var(--primary-color) !important;
    }

    .site-header.header-scrolled .cart svg path,
    .site-header.header-scrolled .cart svg rect {
        stroke: #333333 !important;
        filter: none;
    }

    /* ----------------------------------------------------------------------
       子目录下拉浮窗 (PC端完美居中、自适应尺寸与微投影)
       解决原问题：
       1. 父级 li 缺少 relative 定位导致定位飘到其他菜单下方；
       2. menu > ul 存在 overflow:hidden 限制；
       3. 子菜单强制 min-height:80px 导致单项内容呈现巨大空方块。
       ---------------------------------------------------------------------- */
    .site-header .nav-pc,
    .site-header .nav-pc .menu,
    .site-header .nav-pc .menu > ul {
        overflow: visible !important;
    }

    .site-header .nav-pc .menu > ul > li {
        position: relative !important;
    }

    .site-header .nav-pc .menu-dropdown-icon > a::after {
        float: none !important;
        margin-left: 6px !important;
        display: inline-block !important;
        font-size: 11px !important;
        line-height: 1 !important;
        vertical-align: middle !important;
        transition: transform 0.25s ease !important;
    }

    .site-header .nav-pc .menu-dropdown-icon.rotate-icon > a::after {
        transform: rotate(180deg) !important;
    }

    .site-header .nav-pc .menu > ul > li > .sub-menu {
        position: absolute !important;
        top: calc(100% + 8px) !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        margin: 0 !important;
        margin-left: 0 !important;
        min-width: 140px !important;
        width: max-content !important;
        max-width: 220px !important;
        padding: 6px 0 !important;
        background: #ffffff !important;
        border-radius: 10px !important;
        box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.16), 0 4px 10px -2px rgba(15, 23, 42, 0.06) !important;
        border: 1px solid rgba(226, 232, 240, 0.9) !important;
        z-index: 1050 !important;
    }

    /* 悬停连接桥：消除导航文字到浮窗之间的空隙，防止鼠标滑下时失焦关闭 */
    .site-header .nav-pc .menu > ul > li > .sub-menu::before {
        content: "";
        position: absolute;
        top: -12px;
        left: 0;
        width: 100%;
        height: 12px;
    }

    /* 顶部居中微三角指示器 */
    .site-header .nav-pc .menu > ul > li > .sub-menu::after {
        content: "";
        position: absolute;
        top: -5px;
        left: 50%;
        transform: translateX(-50%) rotate(45deg);
        width: 10px;
        height: 10px;
        background: #ffffff;
        border-top: 1px solid rgba(226, 232, 240, 0.9);
        border-left: 1px solid rgba(226, 232, 240, 0.9);
    }

    .site-header .nav-pc .menu > ul > li > .sub-menu .sub-menu-list {
        min-height: 0 !important;
        padding: 0 !important;
        margin: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: stretch !important;
    }

    .site-header .nav-pc .menu > ul > li > .sub-menu .sub-menu-item {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        border-bottom: none !important;
    }

    .site-header .nav-pc .menu > ul > li > .sub-menu .sub-menu-item a {
        display: block !important;
        font-size: 14px !important;
        line-height: 1.5 !important;
        font-weight: 500 !important;
        color: #334155 !important;
        text-shadow: none !important;
        text-align: center !important;
        padding: 8px 18px !important;
        margin: 2px 6px !important;
        border-radius: 6px !important;
        white-space: nowrap !important;
        background: transparent !important;
        transition: all 0.2s ease !important;
    }

    .site-header .nav-pc .menu > ul > li > .sub-menu .sub-menu-item a:hover {
        color: var(--primary-color) !important;
        background-color: #f1f5f9 !important;
    }

    .site-header .lang-wrapper .lang-dropdown ul {
        background: #ffffff !important;
        border-radius: 12px;
        box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
        border: 1px solid rgba(226, 232, 240, 0.85);
        padding: 10px 8px;
    }

    .site-header .lang-wrapper .lang-dropdown ul li a {
        color: #334155 !important;
        text-shadow: none !important;
        border-radius: 6px;
        transition: all 0.2s ease;
    }

    .site-header .lang-wrapper .lang-dropdown ul li a:hover {
        color: var(--primary-color) !important;
        background-color: #f1f5f9 !important;
    }

    /* 内页 Banner 在 PC 端保证充足高度与顶部间距，展示透出效果且不遮挡文字 */
    .neibanner {
        min-height: 280px;
        max-height: 380px;
        padding-top: 75px;
    }
}

/* 移动端 (< 992px) 稳定白底与吸顶 */
@media (max-width: 991.98px) {
    .site-header {
        position: sticky;
        top: 0;
        height: 60px;
        background: #ffffff !important;
        box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06) !important;
        border-bottom: 1px solid var(--border);
    }

    .site-header .nav-pc .menu > ul > li > a {
        color: var(--text-strong);
    }
}

/* --------------------------------------------------------------------------
   四、内页顶部 Banner (手机端优先上屏优化)
   -------------------------------------------------------------------------- */
.neibanner {
    position: relative;
    min-height: 180px;
    max-height: 260px;
    overflow: hidden;
    background-color: #1e293b;
    display: flex;
    align-items: center;
}

.neibanner img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.55;
    filter: brightness(0.85);
}

.neibannerdesc {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 40px 0 20px;
}

.neibannerdesc-title h2 {
    color: #fff;
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 8px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.neibannerdesc-title p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

/* 内页面包屑导航 */
.neinav {
    background: transparent;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    margin-top: 20px;
    padding-top: 14px;
}

.neinav-wrapper li a {
    color: rgba(255, 255, 255, 0.9);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.12);
    font-size: 13px;
    margin-right: 8px;
    transition: var(--transition);
}

.neinav-wrapper li.active a,
.neinav-wrapper li a:hover {
    background: var(--primary-color);
    color: #fff;
}

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

.neiposition a {
    color: rgba(255, 255, 255, 0.9);
}

/* --------------------------------------------------------------------------
   五、产品分类与筛选栏 (支持手机端折叠收起)
   -------------------------------------------------------------------------- */
.product-filter {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 22px;
    margin: 24px 0 28px;
    box-shadow: var(--shadow-xs);
}

.filter-row {
    align-items: center;
}

.filter-title {
    font-weight: 700;
    color: var(--text-strong);
    min-width: 80px;
    font-size: 14px;
}

.filter-values ul {
    margin: 0;
    padding: 0;
    list-style: none;
    gap: 8px;
}

.filter-values li a {
    display: inline-flex;
    align-items: center;
    padding: 7px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-body);
    background: var(--bg-alt);
    border-radius: var(--radius-pill);
    transition: var(--transition);
    text-decoration: none;
}

.filter-values li.active a,
.filter-values li a:hover {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.25);
}

/* 手机端筛选折叠切换条 */
.mobile-filter-bar {
    display: none;
}

.mobile-filter-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 18px;
    font-weight: 600;
    color: var(--text-strong);
    font-size: 14px;
    box-shadow: var(--shadow-xs);
    cursor: pointer;
    margin-bottom: 16px;
}

.mobile-filter-toggle i {
    color: var(--primary-color);
    transition: transform 0.2s ease;
}

.mobile-filter-toggle.active i.fa-chevron-down {
    transform: rotate(180deg);
}

/* --------------------------------------------------------------------------
   六、产品列表页 PC 端 3 列规范与末行留白解决方案
   -------------------------------------------------------------------------- */
.product-wrapper {
    padding-bottom: 50px;
}

/* PC 端统一采用 3 列网格布局，信息充实，完美解决 4 列末行留白问题 */
@media (min-width: 992px) {
    .product-list.row > .product-item {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
}

.product-list.row {
    margin-left: -12px;
    margin-right: -12px;
    align-items: stretch;
}

.product-item {
    padding-left: 12px;
    padding-right: 12px;
    margin-bottom: 26px;
    display: flex;
}

/* 产品卡片整体规范 */
.product-item-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none !important;
    position: relative;
}

.product-item-wrapper:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-border);
}

/* 产品封面图：统一 4:3 比例，高清自适应 */
.product-item-wrapper .pic {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #e2e8f0;
    overflow: hidden;
    position: relative;
    display: block;
}

.product-item-wrapper .pic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: block;
}

.product-item-wrapper:hover .pic img {
    transform: scale(1.06);
}

/* 产品卡片内容区 */
.product-item-wrapper .content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px 22px;
    text-align: left !important;
    background: #fff;
}

/* 核心标题：俄语 2 行截断 */
.product-item-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.45;
    color: var(--text-strong);
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 48px;
    transition: color 0.2s ease;
}

.product-item-wrapper:hover .product-item-title {
    color: var(--primary-color);
}

/* 核心亮点/摘要 */
.product-item-info {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-muted);
    margin: 0 0 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 42px;
}

/* 卡片底栏 */
.product-item-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

/* 价格标签（可选） */
.product-item-bottom .price {
    color: var(--accent-color);
    font-size: 18px;
    font-weight: 700;
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
}

.product-item-bottom .price .price-unit {
    font-size: 13px;
    font-weight: 600;
}

/* 统一「查看详情」胶囊按钮 */
.product-item-wrapper .public-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color) !important;
    background-color: var(--primary-light);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-pill);
    transition: var(--transition);
    cursor: pointer;
    margin-left: auto;
}

.product-item-wrapper:hover .public-more {
    background-color: var(--primary-color);
    color: #fff !important;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.3);
}

.product-item-wrapper .public-more i {
    font-size: 12px;
    transition: transform 0.2s ease;
}

.product-item-wrapper:hover .public-more i {
    transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   七、产品详情页纯展示体验规范 (Product Detail Pure Showcase)
   -------------------------------------------------------------------------- */
.product-content-info {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 28px;
    margin: 30px 0 35px;
}

/* 左侧图片画廊轮播 */
.procontent1_l {
    margin-bottom: 20px;
}

.gallery-top {
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius);
    overflow: hidden;
    background: #0f172a;
    position: relative;
}

.gallery-top .swiper-slide {
    position: relative;
    cursor: zoom-in;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-top .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 提示点击放大的悬浮角标 */
.gallery-top::after {
    content: "\f00e  Нажмите для увеличения / 点击放大";
    font-family: "FontAwesome", "Open Sans", sans-serif;
    position: absolute;
    right: 12px;
    bottom: 12px;
    background: rgba(15, 23, 42, 0.72);
    color: #fff;
    padding: 5px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 500;
    pointer-events: none;
    z-index: 5;
    backdrop-filter: blur(4px);
    transition: opacity 0.2s ease;
}

.gallery-thumbs {
    margin-top: 12px;
    box-sizing: border-box;
    padding: 4px 0;
}

.gallery-thumbs .swiper-slide {
    aspect-ratio: 4 / 3;
    height: 72px;
    opacity: 0.55;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.gallery-thumbs .swiper-slide-thumb-active,
.gallery-thumbs .swiper-slide:hover {
    opacity: 1;
    border-color: var(--primary-color);
}

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

/* 右侧产品核心信息 */
.procontent1_r {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.procont_ltop h2 {
    font-size: 26px;
    line-height: 1.35;
    color: var(--text-strong);
    margin: 0 0 10px;
    font-weight: 700;
}

.procont_ltop p {
    font-size: 15px;
    color: var(--text-muted);
    margin: 0 0 18px;
    font-weight: 500;
}

.procont_lbot {
    background: var(--bg-page);
    border-left: 3px solid var(--primary-color);
    padding: 14px 18px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 20px;
}

.procont_lbot p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    margin: 0;
}

/* 产品核心展示标签与快捷定位 */
.product-quick-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.spec-badge {
    background: var(--bg-page);
    border: 1px solid var(--border);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 10px;
}

.spec-badge i {
    font-size: 16px;
    color: var(--primary-color);
    width: 22px;
    text-align: center;
}

.spec-badge-text {
    font-size: 13px;
    color: var(--text-strong);
    font-weight: 600;
}

.spec-badge-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* 详情页展示操作栏（纯展示定位，无营销烦扰） */
.procontent_zx {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.product-info-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-color);
    background: var(--accent-light);
    border: 1px solid rgba(225, 29, 72, 0.2);
    padding: 8px 22px;
    border-radius: var(--radius-pill);
    display: inline-flex;
    align-items: baseline;
    gap: 4px;
}

.btn-anchor-jump {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    background: var(--primary-color);
    color: #fff !important;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid var(--primary-color);
    transition: var(--transition);
    text-decoration: none;
}

.btn-anchor-jump:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.35);
}

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

.btn-anchor-jump.btn-outline:hover {
    background: var(--primary-light);
}

/* 详情页选项卡与内容体 */
.page-content-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 50px;
}

.page-content-card .tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: #fafbfc;
    padding: 0 16px;
    overflow-x: auto;
}

.page-content-card .tabs-item {
    padding: 18px 26px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.page-content-card .tabs-item:hover {
    color: var(--primary-color);
}

.page-content-card .tabs-item.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: #fff;
}

.page-content-card .card-body {
    padding: 36px 32px;
    font-size: 15px;
    line-height: 1.85;
    color: var(--text-body);
}

/* --------------------------------------------------------------------------
   八、结构化旅游行程模块 (Structured Itinerary Timeline)
   -------------------------------------------------------------------------- */
.itinerary-container {
    margin: 28px 0;
}

.itinerary-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 0 0 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.itinerary-section-title i {
    color: var(--primary-color);
}

.itinerary-timeline {
    position: relative;
    padding-left: 54px;
}

/* 时间线中轴 */
.itinerary-timeline::before {
    content: "";
    position: absolute;
    left: 20px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color) 0%, #cbd5e1 100%);
}

.itinerary-day {
    position: relative;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 26px;
    margin-bottom: 22px;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
}

.itinerary-day:hover {
    border-color: var(--primary-border);
    box-shadow: var(--shadow-sm);
}

/* D1 / D2 / D3 徽标 */
.itinerary-day__badge {
    position: absolute;
    left: -54px;
    top: 18px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    font-weight: 800;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 4px #fff, 0 4px 10px rgba(var(--primary-rgb), 0.35);
    z-index: 2;
    transition: var(--transition);
}

.itinerary-day:hover .itinerary-day__badge {
    transform: scale(1.1);
}

/* 每日行程标题栏与折叠触发 */
.itinerary-day__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    margin-bottom: 14px;
}

.itinerary-day__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 0;
    line-height: 1.4;
}

.itinerary-day__toggle {
    color: var(--text-muted);
    font-size: 14px;
    padding: 4px;
    transition: transform 0.2s ease;
}

.itinerary-day.collapsed .itinerary-day__toggle i {
    transform: rotate(-90deg);
}

/* 行程元数据标签栏 (城市、交通、餐饮、住宿、亮点) */
.itinerary-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px dashed var(--border);
}

.itinerary-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    background: var(--bg-alt);
    color: var(--text-body);
}

.itinerary-chip i {
    font-size: 12px;
}

.itinerary-chip.chip-city {
    background: #e0f2fe;
    color: #0369a1;
}

.itinerary-chip.chip-traffic {
    background: #fef3c7;
    color: #b45309;
}

.itinerary-chip.chip-meal {
    background: #dcfce7;
    color: #15803d;
}

.itinerary-chip.chip-hotel {
    background: #f3e8ff;
    color: #7e22ce;
}

.itinerary-chip.chip-highlight {
    background: #ffe4e6;
    color: #be123c;
}

/* 行程详述内容 */
.itinerary-day__body {
    color: var(--text-body);
    font-size: 14px;
    line-height: 1.8;
}

.itinerary-day.collapsed .itinerary-day__body {
    display: none;
}

.itinerary-day__body p {
    margin: 0 0 10px;
}

/* --------------------------------------------------------------------------
   九、高清图片画廊模块 (HD Photo Gallery & Lightbox)
   -------------------------------------------------------------------------- */
.gallery-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 32px 0 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin: 20px 0 35px;
}

.gallery-item {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: zoom-in;
    background: #e2e8f0;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.06);
}

.gallery-item__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.gallery-item:hover .gallery-item__overlay {
    opacity: 1;
}

.gallery-item__overlay i {
    color: #fff;
    font-size: 24px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.4));
}

/* 自主全屏灯箱 Modal (独立于后台，零依赖支持手势与关闭) */
.hd-lightbox-modal {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(15, 23, 42, 0.94);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.hd-lightbox-modal.active {
    display: flex;
}

.hd-lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 88vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hd-lightbox-img {
    max-width: 100%;
    max-height: 86vh;
    border-radius: var(--radius);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    object-fit: contain;
}

.hd-lightbox-close,
.hd-lightbox-prev,
.hd-lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.hd-lightbox-close:hover,
.hd-lightbox-prev:hover,
.hd-lightbox-next:hover {
    background: var(--primary-color);
}

.hd-lightbox-close {
    top: 24px;
    right: 24px;
}

.hd-lightbox-prev {
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
}

.hd-lightbox-next {
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
}

/* --------------------------------------------------------------------------
   十、视频模块 (16:9 响应式播放器：本地上传 + 外链嵌入)
   -------------------------------------------------------------------------- */
.video-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 32px 0 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.video-section-title i {
    color: var(--accent-color);
}

.product-videos-container {
    margin: 20px 0 32px;
}

.video-embed-wrapper {
    background: #0f172a;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    margin-bottom: 22px;
}

.video-embed-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 10px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #e2e8f0;
    font-size: 13px;
    font-weight: 600;
}

.video-embed-header .video-source-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.1);
    font-size: 11px;
}

.video-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
}

/* 针对较老浏览器无 aspect-ratio 时的兜底 */
@supports not (aspect-ratio: 16 / 9) {
    .video-embed {
        padding-top: 56.25%;
        height: 0;
    }
}

.video-embed iframe,
.video-embed video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* 多视频网格（支持1~3个视频同时或自适应排列） */
.video-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.video-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

/* --------------------------------------------------------------------------
   十一、目的地展示与资讯攻略卡片规范 (参考竞品范式)
   -------------------------------------------------------------------------- */
/* 目的地卡片 (参考 visitspain.com.cn 大图实景优先与胶囊跳转) */
.destination-card,
.case-item {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    margin-bottom: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.destination-card:hover,
.case-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-border);
}

.destination-img,
.case-item-img {
    aspect-ratio: 16 / 10;
    width: 100%;
    overflow: hidden;
    position: relative;
}

.destination-img img,
.case-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.destination-card:hover .destination-img img,
.case-item:hover .case-item-img img {
    transform: scale(1.06);
}

.destination-body,
.case-content-wrapper {
    padding: 18px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.destination-title,
.case-item-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 0 0 8px;
}

.destination-desc,
.case-item-info {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* 资讯/攻略卡片 (参考 russiantravell.cn) */
.news-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
    margin-bottom: 24px;
}

.news-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-border);
}

.news-item-img {
    aspect-ratio: 16 / 11;
    overflow: hidden;
}

.news-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.news-item .card-body {
    padding: 16px 20px;
}

.news-item .card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 8px;
}

.news-item .card-info {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    gap: 14px;
}

.news-item .card-text {
    font-size: 13px;
    color: var(--text-body);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   十二、移动端与响应式断点深度适配 (320px ~ 430px 全面覆盖)
   -------------------------------------------------------------------------- */
/* 小屏可点击区域不小于 44×44px，避免手持误触 */
@media (max-width: 768px) {
    .filter-values li a,
    .product-item-wrapper .public-more,
    .neinav-wrapper li a,
    .search-submit,
    .menu-mobile,
    .btn-anchor-jump,
    .itinerary-day__header {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
    }
}

/* 平板与手机端折叠分类栏 */
@media (max-width: 991px) {
    .mobile-filter-bar {
        display: block;
    }

    .product-filter {
        display: none;
        margin-top: 0;
    }

    .product-filter.is-open {
        display: block;
        animation: fadeInDown 0.25s ease;
    }

    .filter-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* 手机端主流大屏 (390px ~ 430px：iPhone 12/13/14/15/Plus/Pro Max, Android主流) */
@media (max-width: 430px) {
    .neibanner {
        min-height: 130px;
        max-height: 150px;
    }

    .neibannerdesc {
        padding: 20px 0 10px;
    }

    .neibannerdesc-title h2 {
        font-size: 22px;
    }

    .neibannerdesc-title p {
        font-size: 12px;
    }

    /* 产品卡片单列全宽展示，内容清晰舒适 */
    .product-list.row > .product-item {
        flex: 0 0 100%;
        max-width: 100%;
        padding-left: 6px;
        padding-right: 6px;
    }

    .product-item-wrapper .content-wrapper {
        padding: 16px;
    }

    .product-item-title {
        font-size: 16px;
        min-height: auto;
    }

    /* 详情页手机端上屏优化 */
    .product-content-info {
        padding: 16px;
        margin: 16px 0 24px;
        border-radius: var(--radius);
    }

    .procont_ltop h2 {
        font-size: 20px;
    }

    .gallery-top {
        aspect-ratio: 4 / 3;
    }

    .gallery-thumbs .swiper-slide {
        height: 56px;
    }

    .product-quick-specs {
        grid-template-columns: 1fr;
    }

    .procontent_zx {
        flex-direction: column;
        align-items: stretch;
    }

    .product-info-price,
    .btn-anchor-jump {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .page-content-card .tabs-item {
        padding: 14px 16px;
        font-size: 14px;
    }

    .page-content-card .card-body {
        padding: 20px 16px;
    }

    /* 行程模块在手机端紧凑纵向排列 */
    .itinerary-timeline {
        padding-left: 44px;
    }

    .itinerary-timeline::before {
        left: 16px;
    }

    .itinerary-day {
        padding: 16px;
    }

    .itinerary-day__badge {
        left: -44px;
        width: 34px;
        height: 34px;
        font-size: 13px;
    }

    .itinerary-day__title {
        font-size: 16px;
    }

    .video-grid-2,
    .video-grid-3 {
        grid-template-columns: 1fr;
    }
}

/* 手机端中等屏 (360px ~ 389px) */
@media (max-width: 389px) {
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }

    .main-slider h2 {
        font-size: 22px;
        line-height: 1.3;
    }

    .procont_ltop h2 {
        font-size: 19px;
    }
}

/* 超小屏适配 (320px ~ 359px：iPhone SE 1代及紧凑机型) */
@media (max-width: 359px) {
    body {
        font-size: 14px;
    }

    .neibannerdesc-title h2 {
        font-size: 20px;
    }

    .product-item-title {
        font-size: 15px;
    }

    .product-item-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .product-item-wrapper .public-more {
        margin-left: 0;
        width: 100%;
    }

    .itinerary-timeline {
        padding-left: 36px;
    }

    .itinerary-day__badge {
        left: -36px;
        width: 28px;
        height: 28px;
        font-size: 11px;
    }
}

/* 适配 iOS 刘海屏与底部横条安全区 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    footer {
        padding-bottom: calc(20px + env(safe-area-inset-bottom));
    }
}

/* 详情与列表锚点留出固定导航栏空间，手机端侧栏默认收起 */
#sec-itinerary,
#sec-gallery,
#sec-video {
    scroll-margin-top: 96px;
}

@media (max-width: 991px) {
    .mobile-filter-bar {
        margin: 18px 0 12px;
    }

    .mobile-filter-toggle {
        min-height: 48px;
        margin-bottom: 0;
        text-align: left;
    }

    .mobile-filter-toggle > span {
        min-width: 0;
        overflow-wrap: anywhere;
    }

    .mobile-collapsible-filter {
        display: none;
    }

    .mobile-collapsible-filter.is-open {
        display: block;
    }

    .hd-lightbox-modal {
        padding: max(12px, env(safe-area-inset-top)) 12px max(12px, env(safe-area-inset-bottom));
        touch-action: pan-y;
    }

    .hd-lightbox-content,
    .hd-lightbox-img {
        max-width: 100%;
        max-height: 82vh;
    }

    .hd-lightbox-close {
        top: max(12px, env(safe-area-inset-top));
        right: 12px;
    }

    .hd-lightbox-prev {
        left: 8px;
    }

    .hd-lightbox-next {
        right: 8px;
    }
}

/* --------------------------------------------------------------------------
   十三、优化联系方式模块与底部展示 (规整 lianxi.html 破坏)
   -------------------------------------------------------------------------- */
.contact-fast-wrapper {
    max-width: 640px;
    width: 100%;
    margin: 30px auto;
    padding: 0 16px;
}

.contact-fast-wrapper .btn {
    border-radius: var(--radius);
    padding: 14px 18px;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
}

.contact-fast-wrapper .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   十四、为什么选择我们 / 核心服务优势 (借鉴 russiantravell.cn)
   -------------------------------------------------------------------------- */
.why-us-wrapper {
    background: #ffffff;
    padding: 60px 0;
    margin: 40px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.why-us-item {
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 22px;
    text-align: center;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

.why-us-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-border);
    background: #fff;
}

.why-us-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light) 0%, #e0e7ff 100%);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 18px;
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.15);
    transition: var(--transition);
}

.why-us-item:hover .why-us-icon {
    transform: scale(1.1) rotate(6deg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
}

.why-us-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-strong);
    margin: 0 0 6px;
}

.why-us-subtitle {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.why-us-desc {
    font-size: 13px;
    line-height: 1.65;
    color: var(--text-muted);
    margin: 0;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------------------------------
   十五、文章富文本与内页优化 (Content Typography & In-depth refinement)
   -------------------------------------------------------------------------- */
.content-typography {
    font-size: 15px;
    line-height: 1.85;
    color: #334155;
    word-break: break-word;
}

.content-typography img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: var(--radius);
    margin: 16px 0;
    box-shadow: var(--shadow-xs);
}

.content-typography table {
    width: 100% !important;
    margin: 16px 0;
    border-collapse: collapse;
    overflow-x: auto;
    display: block;
}

.content-typography table th,
.content-typography table td {
    padding: 10px 14px;
    border: 1px solid #e2e8f0;
}

/* 下载列表项 */
.download-item:hover {
    background-color: #f8fafc;
}

/* 侧边联系工具栏：独立白色卡片与金色图标 */
#backTop.backtop-toolbar {
    position: fixed;
    top: auto;
    right: max(20px, env(safe-area-inset-right));
    bottom: max(32px, env(safe-area-inset-bottom));
    transform: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 62px;
    background: transparent;
    box-shadow: none;
    z-index: 900;
}

#backTop .backtop-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 62px;
    min-height: 62px;
    padding: 10px 5px;
    border: 1px solid #f1eee9;
    border-radius: 10px;
    background: #fff;
    color: #b58b4d;
    box-shadow: 0 3px 16px rgba(25, 35, 48, .09);
    font: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: background .2s ease, color .2s ease, box-shadow .2s ease;
}

#backTop .backtop-action:hover,
#backTop .backtop-action[aria-expanded="true"] {
    background: #faf6ef;
    color: #8d672f;
    box-shadow: 0 5px 18px rgba(25, 35, 48, .13);
}

#backTop .backtop-action:focus-visible {
    outline: 2px solid #b58b4d;
    outline-offset: 3px;
}

#backTop .backtop-action i {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    color: inherit;
    font-size: 26px;
    line-height: 1;
}

#backTop .backtop-label {
    font-style: normal;
    font-size: 12px;
    line-height: 1.4;
    text-align: center;
    overflow-wrap: anywhere;
}

#backTop .backtop-contact {
    min-height: 112px;
}

#backTop .backtop-contact.is-vertical .backtop-label {
    writing-mode: vertical-rl;
    letter-spacing: 2px;
    font-size: 16px;
}

#backTop .backtop-wechat {
    position: relative;
}

#backTop .backtop-popover {
    position: absolute;
    right: calc(100% + 12px);
    bottom: 0;
    width: 218px;
    max-width: calc(100vw - 96px);
    padding: 16px;
    border: 1px solid #eee8de;
    border-radius: 12px;
    background: #fff;
    color: #334155;
    box-shadow: 0 6px 28px rgba(15, 23, 42, .14);
    text-align: center;
}

/* 覆盖弹层与按钮之间的间隙，鼠标移入二维码时保持展开。 */
#backTop .backtop-popover::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 100%;
    width: 14px;
}

#backTop .backtop-popover[hidden],
#backTop .backtop-popover [hidden] {
    display: none;
}

#backTop .backtop-qr {
    display: block;
    width: 184px;
    max-width: 100%;
    height: auto;
    margin: 10px auto;
    padding: 6px;
    background: #fff;
    object-fit: contain;
}

#backTop .backtop-popover p {
    margin: 10px 0 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.6;
}

#site-contact {
    scroll-margin-top: 96px;
}

@media (max-width: 767.98px) {
    #backTop.backtop-toolbar {
        right: max(10px, env(safe-area-inset-right));
        bottom: max(16px, env(safe-area-inset-bottom));
        width: 46px;
        gap: 8px;
    }

    #backTop .backtop-action {
        width: 46px;
        min-height: 46px;
        padding: 8px 4px;
        gap: 4px;
        border-radius: 8px;
    }

    #backTop .backtop-action i {
        font-size: 22px;
    }

    #backTop .backtop-contact {
        min-height: 92px;
    }

    #backTop .backtop-label {
        font-size: 10px;
    }

    #backTop .backtop-popover {
        width: 200px;
        max-width: calc(100vw - 80px);
        padding: 12px;
    }
}

/* --------------------------------------------------------------------------
   十六、首页顶部轮播图高度精细化重构 (Hero Banner Optimization)
   解决默认 800px 造成首屏过高压迫、内容无法露出的问题
   -------------------------------------------------------------------------- */
.main-slider {
    position: relative;
    width: 100%;
    /* PC端黄金高度：480px，既呈现电影级宽幅全景，又让首屏自然露出下方内容 */
    height: 480px !important;
    max-height: 480px !important;
    overflow: hidden;
    background-color: #0f172a;
}

.main-slider .swiper-wrapper,
.main-slider .swiper-slide {
    height: 100% !important;
    position: relative;
}

.main-slider .swiper-slide .swiper-silde-img {
    width: 100%;
    height: 100% !important;
    min-height: auto !important;
    max-height: none !important;
    object-fit: cover;
    object-position: center center;
    transform: scale(1);
    transition: transform 7000ms ease;
    display: block;
}

.main-slider .swiper-slide-active .swiper-silde-img {
    transform: scale(1.08);
}

/* 遮罩层微调，保证文字无论在雪地、晚霞、蓝冰下都清晰可读 */
.main-slider .image-layer-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        rgba(15, 23, 42, 0.65) 0%,
        rgba(15, 23, 42, 0.35) 45%,
        rgba(15, 23, 42, 0.1) 100%
    );
    z-index: 2;
    pointer-events: none;
}

/* 轮播文字排版比例协调 */
.main-slider .swiper-slide-content {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    align-items: center;
}

.main-slider__content {
    max-width: 720px;
}

.main-slider__content h2 {
    font-size: 38px !important;
    font-weight: 800 !important;
    line-height: 1.25 !important;
    color: #ffffff;
    margin-bottom: 14px !important;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.5px;
}

.main-slider__content p {
    font-size: 15px !important;
    line-height: 1.6 !important;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 22px !important;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    max-width: 600px;
}

.main-slider__content .more {
    font-size: 13px !important;
    padding: 10px 28px !important;
    letter-spacing: 1px !important;
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
}

/* 分页器和箭头调整 */
#main-slider-pagination {
    bottom: 18px !important;
}

#main-slider-pagination .swiper-pagination-bullet {
    width: 28px;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

#main-slider-pagination .swiper-pagination-bullet-active {
    width: 44px;
    background: var(--primary-color, #0056b3);
}

.main-slider__nav .swiper-button-prev,
.main-slider__nav .swiper-button-next {
    width: 44px;
    height: 44px;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.main-slider__nav .swiper-button-prev:hover,
.main-slider__nav .swiper-button-next:hover {
    background: var(--primary-color, #0056b3);
    border-color: var(--primary-color, #0056b3);
}

/* 响应式断点控制 */
@media (max-width: 1199.98px) {
    .main-slider {
        height: 420px !important;
        max-height: 420px !important;
    }
    .main-slider__content h2 {
        font-size: 34px !important;
    }
}

@media (max-width: 991.98px) {
    .main-slider {
        height: 360px !important;
        max-height: 360px !important;
    }
    .main-slider__content h2 {
        font-size: 28px !important;
        margin-bottom: 10px !important;
    }
    .main-slider__content p {
        font-size: 14px !important;
        margin-bottom: 18px !important;
    }
    .main-slider__content .more {
        font-size: 12px !important;
        padding: 8px 22px !important;
    }
}

@media (max-width: 767.98px) {
    .main-slider {
        height: 280px !important;
        max-height: 280px !important;
    }
    .main-slider .image-layer-overlay {
        background: linear-gradient(
            180deg,
            rgba(15, 23, 42, 0.3) 0%,
            rgba(15, 23, 42, 0.7) 100%
        );
    }
    .main-slider__content {
        padding: 0 10px;
    }
    .main-slider__content h2 {
        font-size: 22px !important;
        line-height: 1.3 !important;
        margin-bottom: 8px !important;
    }
    .main-slider__content p {
        font-size: 13px !important;
        line-height: 1.4 !important;
        margin-bottom: 14px !important;
        -webkit-line-clamp: 2;
    }
    .main-slider__content .more {
        font-size: 12px !important;
        padding: 6px 18px !important;
    }
}

@media (max-width: 430px) {
    .main-slider {
        height: 250px !important;
        max-height: 250px !important;
    }
    .main-slider__content h2 {
        font-size: 19px !important;
    }
    .main-slider__content p {
        font-size: 12px !important;
        margin-bottom: 12px !important;
    }
}

/* 详情页内容区紧凑布局：减少产品卡片与标签栏之间的空白 */
#product-detail-sections.page-content {
    padding: 14px 0 40px;
}

#product-detail-sections .page-content-card {
    margin-top: 0;
    margin-bottom: 32px;
}

#product-detail-sections .page-content-card .tabs {
    min-height: 64px;
    padding: 0 18px;
    align-items: stretch;
}

#product-detail-sections .page-content-card .tabs-item {
    min-height: 64px;
    padding: 17px 20px;
    line-height: 1.35;
    white-space: nowrap;
}

#product-detail-sections .page-content-card .card-body {
    padding: 26px 30px;
}

#product-detail-sections .page-content-card .card-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.product-content-info {
    margin-bottom: 16px;
}

.procontent_zx .btn-anchor-jump {
    white-space: nowrap;
    flex: 0 0 auto;
    width: auto;
    min-width: 0;
    height: auto;
    min-height: 40px;
    padding-left: 16px;
    padding-right: 16px;
}

@media (max-width: 767.98px) {
    #product-detail-sections.page-content {
        padding: 8px 0 28px;
    }

    #product-detail-sections .page-content-card .tabs {
        min-height: 54px;
        padding: 0 8px;
    }

    #product-detail-sections .page-content-card .tabs-item {
        min-height: 54px;
        padding: 14px 12px;
        font-size: 13px;
    }

    #product-detail-sections .page-content-card .card-body {
        padding: 18px 14px;
    }

    .product-content-info {
        margin-bottom: 12px;
    }

    .procontent_zx .btn-anchor-jump {
        width: 100%;
        justify-content: center;
        padding-left: 12px;
        padding-right: 12px;
    }
}