/* ============================================================
   CSS 变量 & 全局重置（优化版）
   ============================================================ */
:root {
    /* ---------- 品牌色 ---------- */
    --primary-dark: #0F3460;
    --primary-dark-hover: #154580;
    --primary-blue: #165DFF;
    --primary-blue-light: rgba(22, 93, 255, 0.12);
    --primary-blue-glow: rgba(22, 93, 255, 0.15);

    /* ---------- 文本色 ---------- */
    --text-black: #1a1a1a;
    --text-gray: #333;
    --text-mid: #555;
    --text-light: #666;
    --text-weak: #888;

    /* ---------- 背景 & 边框 ---------- */
    --white: #ffffff;
    --bg-light: #f5f7fa;
    --bg-soft: #f8f9fa;
    --bg-tag: #edf4fb;
    --bg-hover: #f0f4fc;
    --border-light: #e5e7eb;

    /* ---------- 阴影 ---------- */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.12);

    /* ---------- 尺寸 ---------- */
    --header-height: 80px;
    --header-height-mobile: 90px;

    /* ---------- 字体缩放（收紧范围，视觉更统一） ---------- */
    --base: 14px;
    --fs-xs: clamp(12px, 0.8vw, 13px);
    --fs-sm: clamp(13px, 1vw, 14px);
    --fs-base: clamp(14px, 1.1vw, 16px);
    --fs-md: clamp(15px, 1.3vw, 18px);
    --fs-lg: clamp(17px, 1.5vw, 22px);
    --fs-xl: clamp(19px, 1.8vw, 26px);
    --fs-2xl: clamp(23px, 2.4vw, 34px);
    --fs-3xl: clamp(27px, 2.8vw, 40px);
    --fs-4xl: clamp(31px, 3.6vw, 48px);

    /* ---------- 间距（收紧范围） ---------- */
    --sp-xs: clamp(6px, 0.4vw, 8px);
    --sp-sm: clamp(10px, 0.8vw, 14px);
    --sp-md: clamp(16px, 1.4vw, 22px);
    --sp-lg: clamp(24px, 2.2vw, 34px);
    --sp-xl: clamp(32px, 3vw, 48px);
    --sp-xxl: clamp(42px, 4.4vw, 64px);

    /* ---------- 圆角 ---------- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* ---------- 过渡 ---------- */
    --ease: 0.25s cubic-bezier(0.22, 1, 0.36, 1);
    --ease-bounce: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ============================================================
   重置 & 基础
   ============================================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: var(--base);
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

body {
    font-family: "Microsoft Yahei", Arial, sans-serif;
    color: var(--text-light);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

a {
    text-decoration: none;
    color: inherit;
}
ul {
    list-style: none;
}
img {
    max-width: 100%;
    display: block;
}

::selection {
    background: var(--primary-blue);
    color: var(--white);
}
::-moz-selection {
    background: var(--primary-blue);
    color: var(--white);
}

/* ---------- 不再单独调整移动端字体大小，保持统一 ---------- */

/* ============================================================
   标题 & 文本对齐（核心修改：正文两端对齐）
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    text-align: left;
}
.section-title h1,
.section-title h2,
.section-title h3,
.section-title h4,
.section-title h5,
.section-title h6 {
    text-align: center;
}

/* 正文类：统一使用两端对齐（左右对齐），并对中文优化 */
.text-desc,
.solution-text p,
.about-text p,
.detail-desc,
.service-card p,
.common-ul li,
.contact-item p,
.advantage-list-module li,
.feature-list li p,
.footer-text p {
    text-align: justify;
    text-justify: inter-ideograph;
    letter-spacing: 0.4px;
    line-height: 1.9;
    color: var(--text-mid);
}

/* ============================================================
   导航 Header
   ============================================================ */
header {
    width: 100%;
    height: var(--header-height);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}

.header-wrap {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--sp-sm);
    position: relative;
}

/* ----- Logo ----- */
.logo {
    position: absolute;
    left: 15px;
    top: 0;
    height: 100%;
    display: flex;
    align-items: center;
    z-index: 2;
}
.logo-img {
    height: 26px;
    width: auto;
    object-fit: contain;
}

/* ----- 汉堡菜单按钮（移动端）----- */
.menu-toggle {
    display: none;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 24px;
    z-index: 10;
    cursor: pointer;
}
.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--text-black);
    margin-bottom: 6px;
    border-radius: 2px;
    transition: transform var(--ease), opacity var(--ease);
}
.menu-toggle span:last-child {
    margin-bottom: 0;
}
.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ----- 导航遮罩 ----- */
.nav-mask {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 9997;
}
.nav-mask.show {
    display: block;
}

/* ----- 导航列表（PC）----- */
.nav-list {
    display: flex;
    height: 100%;
    margin: 0 auto;
    user-select: none;
}

.nav-item {
    position: relative;
    height: 100%;
    line-height: var(--header-height);
    padding: 0 18px;
}
.nav-item > a {
    color: var(--text-black);
    font-size: var(--fs-base);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    transition: color var(--ease);
}
.nav-item:hover > a {
    color: var(--primary-dark);
}

.arrow {
    display: inline-block;
    font-size: 12px;
    flex-shrink: 0;
    transition: transform var(--ease-bounce);
}

/* ----- 二级菜单（PC）----- */
.second-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 220px;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
    z-index: 999999;
}
.nav-item:hover .second-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.second-item {
    position: relative;
    height: 52px;
    line-height: 52px;
    padding: 0 18px;
    border-bottom: 1px solid var(--bg-light);
}
.second-item:last-child {
    border-bottom: none;
}
.second-item > a {
    color: var(--text-gray);
    font-size: var(--fs-sm);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    transition: color var(--ease), padding-left var(--ease);
}
.second-item:hover > a {
    color: var(--primary-blue);
    padding-left: 5px;
}

/* ----- 三级菜单（PC）----- */
.third-menu {
    position: absolute;
    top: 0;
    left: 100%;
    width: 220px;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateX(6px);
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
    z-index: 999999;
}
.second-item:hover .third-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.third-item {
    height: 48px;
    line-height: 48px;
    border-bottom: 1px solid var(--bg-light);
}
.third-item:last-child {
    border-bottom: none;
}
.third-item a {
    color: var(--text-light);
    font-size: var(--fs-sm);
    display: block;
    padding: 0 18px;
    transition: color var(--ease), background var(--ease);
}
.third-item:hover a {
    color: var(--primary-blue);
    background: var(--bg-hover);
}

/* ----- 产品预览浮窗 ----- */
.product-preview {
    position: absolute;
    left: 100%;
    top: 0;
    width: 180px;
    height: 130px;
    padding: 8px;
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateX(6px);
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
    z-index: 999999;
}
.third-item:hover .product-preview {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}
.product-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ----- 行业解决方案下拉（PC）----- */
.industry-menu {
    position: absolute;
    left: 0;
    right: 0;
    margin: 0 auto;
    top: 100%;
    min-width: 920px;
    padding: 12px;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px) translateX(-20px);
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
    z-index: 999999;
}
.nav-item-solution:hover .industry-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) translateX(-20px);
}
@media (max-width: 1050px) {
    .industry-menu {
        min-width: 720px;
        gap: 8px;
        padding: 8px;
        transform: translateY(6px) translateX(-15px);
    }
    .nav-item-solution:hover .industry-menu {
        transform: translateY(0) translateX(-15px);
    }
}

.industry-item {
    text-align: center;
}
.industry-item a {
    display: block;
    padding: 6px;
    border-radius: var(--radius-md);
    transition: background var(--ease);
}
.industry-item a:hover {
    background: var(--primary-dark);
}
.industry-img {
    width: 100%;
    height: clamp(120px, 14vw, 140px);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 8px;
    background: var(--bg-light);
}
.industry-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--ease);
}
.industry-item a:hover .industry-img img {
    transform: scale(1.06);
}
.industry-item span {
    font-size: var(--fs-md);
    font-weight: 700;
    color: var(--text-black);
    transition: color var(--ease);
}
.industry-item a:hover span {
    color: var(--white);
}

/* ============================================================
   移动端导航（≤ 992px）- 视觉风格与 PC 统一
   ============================================================ */
@media (max-width: 992px) {
    header {
        height: var(--header-height-mobile);
    }

    .menu-toggle {
        display: block;
    }

    .nav-list {
        position: fixed;
        top: var(--header-height-mobile);
        right: -82%;
        flex-direction: column;
        width: 82%;
        max-width: 400px;
        max-height: calc(100vh - var(--header-height-mobile));
        height: auto;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        transition: right 0.45s cubic-bezier(0.22, 1, 0.36, 1);
        padding: 16px 0 24px;
        overflow-y: auto;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
        border-radius: 24px 0 0 24px;
        box-shadow: -8px 0 40px rgba(0, 0, 0, 0.15);
        z-index: 9998;
        user-select: none;
        will-change: right;
    }
    .nav-list.show {
        right: 0;
    }

    /* ---------- 移动端：导航项（无背景、无圆角，与 PC 风格一致） ---------- */
    .nav-item {
        line-height: normal;
        padding: 0 18px;
        height: auto;
        margin-bottom: 4px;
    }
    .nav-item > a {
        padding: 12px 18px;
        min-height: 48px;
        border-radius: 0;
        background: transparent;
        font-weight: 500;
        color: var(--text-black);
        transition: color 0.2s, transform 0.15s;
        touch-action: manipulation;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 10px;
    }
    .nav-item > a:active {
        background: transparent;
        transform: scale(0.98);
    }
    .nav-item > a .arrow {
        font-size: 15px;
        font-weight: 300;
    }
    .nav-item.open > a .arrow {
        transform: rotate(180deg) scale(1.2);
    }

    /* ---------- 子菜单折叠（无背景） ---------- */
    .second-menu,
    .third-menu,
    .industry-menu {
        position: static !important;
        width: 100% !important;
        box-shadow: none !important;
        background: transparent !important;
        max-height: 0 !important;
        overflow: hidden !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        transition: max-height 0.45s cubic-bezier(0.22, 1, 0.36, 1) !important;
        will-change: max-height !important;
        display: block !important;
        grid-template-columns: none !important;
        gap: 0 !important;
        min-width: auto !important;
        margin: 0 !important;
        padding: 0 0 0 10px !important;
        border-radius: 0 !important;
    }
    .nav-item.open > .second-menu,
    .nav-item.open > .industry-menu {
        max-height: 9999px !important;
        overflow: visible !important;
    }
    .second-item.open > .third-menu {
        max-height: 9999px !important;
        overflow: visible !important;
    }

    .second-item {
        line-height: normal;
        padding: 0;
        height: auto;
        border-bottom: none;
        margin-bottom: 2px;
    }
    .second-item > a {
        padding: 10px 16px 10px 28px;
        min-height: 40px;
        border-radius: 0;
        background: transparent;
        color: var(--text-gray);
        font-weight: 400;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 10px;
        transition: color 0.2s, transform 0.15s;
        touch-action: manipulation;
    }
    .second-item > a:active {
        background: transparent;
        transform: scale(0.97);
    }
    .second-item.open > a .arrow {
        transform: rotate(180deg) scale(1.2);
    }

    .third-item {
        line-height: normal;
        padding: 0;
        height: auto;
        border-bottom: none;
        margin-bottom: 2px;
    }
    .third-item > a {
        padding: 8px 16px 8px 40px;
        min-height: 36px;
        border-radius: 0;
        background: transparent;
        color: var(--text-light);
        font-size: var(--fs-sm);
        transition: color 0.2s, transform 0.15s;
        touch-action: manipulation;
        display: block;
    }
    .third-item > a:active {
        background: transparent;
        transform: scale(0.97);
    }

    /* ---------- 移动端：行业方案卡片（无背景） ---------- */
    .industry-item {
        text-align: left !important;
        padding: 0 !important;
        margin-bottom: 2px !important;
    }
    .industry-item a {
        display: flex !important;
        align-items: center !important;
        gap: 12px !important;
        padding: 8px 16px !important;
        border-radius: 0 !important;
        background: transparent !important;
        transition: color 0.2s !important;
    }
    .industry-item a:active {
        background: transparent !important;
    }
    .industry-img {
        width: 48px !important;
        height: 48px !important;
        flex-shrink: 0 !important;
        border-radius: var(--radius-sm) !important;
        overflow: hidden !important;
        background: var(--bg-light) !important;
        margin-bottom: 0 !important;
    }
    .industry-img img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
    }
    .industry-item span {
        font-size: var(--fs-base) !important;
        font-weight: 500 !important;
        color: var(--text-gray) !important;
    }
    .industry-item a:hover {
        background: transparent !important;
    }
    .industry-item a:hover .industry-img img {
        transform: none !important;
    }
    .industry-item a:hover span {
        color: var(--text-gray) !important;
    }

    /* ---------- 移动端：隐藏预览浮窗 ---------- */
    .product-preview {
        display: none !important;
    }

    /* ---------- 移动端：悬停重置 ---------- */
    .nav-item > a:hover,
    .second-item > a:hover,
    .third-item > a:hover,
    .industry-item a:hover {
        color: inherit;
        background: transparent;
    }

    /* ---------- 移动端：Banner 修正 ---------- */
    .banner-wrap {
        margin-top: var(--header-height-mobile);
    }
    .banner-text-box {
        text-align: left;
        padding-left: 15px;
    }
    .banner-text-box h1 {
        font-size: clamp(18px, 5vw, 28px);
    }
    .banner-text-box p {
        font-size: clamp(13px, 3vw, 15px);
    }
}

/* ============================================================
   Banner 轮播
   ============================================================ */
.banner-wrap {
    margin-top: var(--header-height);
    width: 100%;
    height: clamp(280px, 45vw, 600px);
    overflow: hidden;
    position: relative;
}
.banner-list {
    width: 100%;
    height: 100%;
    display: flex;
    transition: transform 0.6s ease-out;
}
.banner-item {
    flex-shrink: 0;
    width: 100%;
    height: 100%;
    position: relative;
}
.banner-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.banner-text-box {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: left;
    color: var(--white);
    z-index: 2;
    width: 90%;
    max-width: 1200px;
    padding-left: 15px;
}
.banner-text-box h1 {
    font-size: clamp(22px, 4vw, 48px);
    margin-bottom: var(--sp-md);
    line-height: 1.3;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}
.banner-text-box p {
    font-size: clamp(14px, 1.6vw, 18px);
    line-height: 2;
    margin-bottom: var(--sp-lg);
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.25);
}
.banner-btn {
    display: inline-block;
    padding: clamp(10px, 1.4vw, 14px) clamp(24px, 3vw, 36px);
    background: var(--white);
    color: var(--primary-blue);
    font-weight: 700;
    border-radius: var(--radius-full);
    transition: background var(--ease), color var(--ease), box-shadow var(--ease);
    box-shadow: var(--shadow-md);
}
.banner-btn:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.banner-btn-pre,
.banner-btn-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(36px, 4vw, 50px);
    height: clamp(36px, 4vw, 50px);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    border: none;
    color: var(--white);
    font-size: clamp(16px, 2vw, 22px);
    cursor: pointer;
    z-index: 3;
    transition: background var(--ease);
}
.banner-btn-pre:hover,
.banner-btn-next:hover {
    background: rgba(255, 255, 255, 0.7);
}
.banner-btn-pre {
    left: 30px;
}
.banner-btn-next {
    right: 30px;
}
@media (max-width: 768px) {
    .banner-btn-pre {
        left: 10px;
    }
    .banner-btn-next {
        right: 10px;
    }
    .banner-text-box {
        text-align: left !important;
        padding-left: 15px !important;
        transform: translate(-50%, -50%);
    }
}

.banner-dots {
    position: absolute;
    bottom: clamp(16px, 3vw, 30px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: clamp(8px, 1vw, 12px);
    z-index: 3;
}
.dot {
    width: clamp(10px, 1.2vw, 14px);
    height: clamp(3px, 0.4vw, 4px);
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: width var(--ease), background var(--ease);
}
.dot.active {
    background: var(--white);
    width: clamp(22px, 3vw, 32px);
}

/* ============================================================
   通用区块
   ============================================================ */
.section {
    padding: var(--sp-xxl) 0 var(--sp-xl);
    margin-top: 90px;
    scroll-margin-top: calc(var(--header-height) + 10px);
}
.container {
    width: min(94%, 1200px);
    margin: 0 auto;
    padding: 0 var(--sp-sm);
}
.section-title {
    text-align: center;
    margin-bottom: var(--sp-xl);
}
.section-title h2 {
    font-size: var(--fs-3xl);
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-gray);
    margin-bottom: var(--sp-md);
}
.section-title p {
    color: var(--text-light);
    font-size: var(--fs-base);
    letter-spacing: 0.5px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================================
   左右图文
   ============================================================ */
.solution-wrap,
.about-wrap {
    display: flex;
    gap: var(--sp-xl);
    align-items: center;
}
.solution-img,
.about-img {
    flex: 1;
    min-width: 0;
    width: 100%;
    height: clamp(200px, 28vw, 320px);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.solution-img img,
.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--ease);
}
.solution-img img:hover,
.about-img img:hover {
    transform: scale(1.04);
}

.solution-text,
.about-text {
    flex: 1;
    min-width: 0;
}
.solution-text h3,
.about-text h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin-bottom: var(--sp-md);
}
.solution-text p,
.about-text p {
    margin-bottom: var(--sp-md);
}

@media (max-width: 992px) {
    .solution-wrap,
    .about-wrap {
        flex-direction: column;
        gap: var(--sp-lg);
    }
}
.sec-solution-2--reverse .solution-wrap {
    flex-direction: row-reverse;
}
@media (max-width: 992px) {
    .sec-solution-2--reverse .solution-wrap {
        flex-direction: column;
    }
}

.download-btn {
    display: inline-block;
    padding: clamp(8px, 1vw, 10px) clamp(18px, 2vw, 24px);
    background: var(--primary-dark);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: var(--fs-sm);
    transition: background var(--ease);
}
.download-btn:hover {
    background: var(--primary-dark-hover);
}

/* ============================================================
   产品卡片网格
   ============================================================ */
.product-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-xl);
}
@media (max-width: 1100px) {
    .product-list {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--sp-lg);
    }
}
@media (max-width: 992px) {
    .product-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-md);
    }
}
@media (max-width: 576px) {
    .product-list {
        grid-template-columns: 1fr;
        gap: var(--sp-lg);
    }
}

.product-card {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform var(--ease), box-shadow var(--ease);
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.product-img {
    width: 100%;
    height: clamp(130px, 16vw, 170px);
    background: var(--bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.product-img img {
    width: 45% !important;
    height: 45% !important;
    object-fit: contain;
}
.product-info {
    padding: var(--sp-md);
}
.product-info h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin-bottom: var(--sp-sm);
}
.product-info p {
    font-size: var(--fs-sm);
    line-height: 1.8;
    color: var(--text-light);
}

/* ============================================================
   解决方案卡片
   ============================================================ */
.solution-card-box {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-xl);
    margin-top: var(--sp-xl);
}
@media (max-width: 992px) {
    .solution-card-box {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-md);
    }
}
@media (max-width: 576px) {
    .solution-card-box {
        grid-template-columns: 1fr;
    }
}

.solution-card {
    display: block;
    background: var(--white);
    padding: clamp(22px, 3vw, 30px) clamp(14px, 2vw, 20px);
    border-radius: var(--radius-md);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform var(--ease), box-shadow var(--ease);
}
.solution-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}
.card-bg {
    width: 100%;
    height: clamp(140px, 18vw, 180px);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--sp-md);
}
.card-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.card-title {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
}

/* ============================================================
   服务卡片
   ============================================================ */
.service-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-xl);
}
@media (max-width: 992px) {
    .service-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-md);
    }
}
@media (max-width: 576px) {
    .service-list {
        grid-template-columns: 1fr;
    }
}

.service-card {
    text-align: center;
    padding: clamp(28px, 3vw, 40px) clamp(16px, 2vw, 20px);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    transition: transform var(--ease), box-shadow var(--ease);
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--primary-blue-glow);
}
.service-card h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin: var(--sp-md) 0 var(--sp-sm);
}

/* ============================================================
   联系信息
   ============================================================ */
.contact-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-xl);
    text-align: center;
}
@media (max-width: 992px) {
    .contact-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-md);
    }
}
@media (max-width: 576px) {
    .contact-list {
        grid-template-columns: 1fr;
    }
}

.contact-item {
    padding: clamp(22px, 3vw, 30px) clamp(14px, 2vw, 20px);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    transition: transform var(--ease);
}
.contact-item:hover {
    transform: translateY(-4px);
}
.contact-item h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin-bottom: var(--sp-md);
}

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
    position: fixed;
    right: clamp(14px, 2vw, 30px);
    bottom: clamp(16px, 2vw, 30px);
    width: clamp(38px, 4vw, 44px);
    height: clamp(38px, 4vw, 44px);
    background: var(--white);
    border: 1px solid var(--primary-dark);
    color: var(--primary-dark);
    border-radius: 50%;
    text-align: center;
    line-height: clamp(38px, 4vw, 44px);
    font-size: clamp(16px, 1.8vw, 18px);
    font-weight: 700;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--ease), visibility var(--ease),
        background var(--ease), color var(--ease), transform var(--ease);
    box-shadow: var(--shadow-md);
}
.back-top.show {
    opacity: 1;
    visibility: visible;
}
.back-top:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-4px);
    box-shadow: 0 6px 18px rgba(15, 52, 96, 0.18);
}

/* ============================================================
   页脚
   ============================================================ */
footer {
    width: 100%;
    padding: clamp(26px, 3vw, 40px) 15px;
    background: var(--white);
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
    margin-top: var(--sp-xxl);
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-xl);
    max-width: 1200px;
    margin: 0 auto;
}
@media (max-width: 768px) {
    .footer-inner {
        flex-direction: column;
        gap: var(--sp-lg);
        text-align: center;
    }
}
.footer-text p,
.footer-text a,
.footer-img-desc {
    font-size: var(--fs-sm);
    color: var(--text-weak);
    line-height: 2;
    letter-spacing: 0.4px;
}
.footer-text a {
    position: relative;
    transition: color 0.2s;
}
.footer-text a:hover {
    color: var(--primary-dark);
}
.footer-text a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1.5px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}
.footer-text a:hover::after {
    width: 100%;
}
.footer-right-box {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.footer-img-box {
    width: clamp(80px, 10vw, 100px);
    height: clamp(80px, 10vw, 100px);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 8px;
    background: var(--bg-light);
}

/* ============================================================
   图片预览弹窗
   ============================================================ */
.img-modal {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: clamp(12px, 3vw, 30px);
}
.img-modal.show {
    display: flex;
}
.modal-img {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
}
.img-close {
    position: absolute;
    top: clamp(10px, 2vw, 20px);
    right: clamp(16px, 3vw, 30px);
    color: #fff;
    font-size: clamp(30px, 4vw, 40px);
    cursor: pointer;
    user-select: none;
    transition: color var(--ease);
}
.img-close:hover {
    color: #ccc;
}

/* ============================================================
   全局提示弹窗
   ============================================================ */
.mask-box {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99999;
    display: none;
}
.center-tip-box {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: clamp(28px, 4vw, 40px) clamp(20px, 6vw, 60px);
    border-radius: var(--radius-md);
    text-align: center;
    width: 90%;
    max-width: 420px;
}
.tip-success h3 {
    color: #28a745;
}
.tip-error h3 {
    color: #dc3545;
}
.center-tip-box h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--sp-sm);
}
.center-tip-box p {
    color: var(--text-light);
    margin-bottom: var(--sp-md);
    line-height: 1.7;
    font-size: var(--fs-sm);
}
.tip-close {
    padding: clamp(7px, 1vw, 8px) clamp(20px, 2.6vw, 26px);
    background: var(--primary-blue);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--fs-sm);
    transition: background var(--ease);
}
.tip-close:hover {
    background: var(--primary-dark);
}

/* ============================================================
   产品详情页
   ============================================================ */
.detail-top {
    display: flex;
    gap: 48px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 16px;
}
.detail-img-box {
    flex: 1;
    min-width: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}
.detail-img-box img {
    width: 100%;
    height: auto;
    display: block;
}
.detail-info {
    flex: 1;
    min-width: 0;
}
@media (max-width: 992px) {
    .detail-top {
        flex-direction: column;
        gap: 32px;
        padding: 32px 16px;
    }
}
.detail-info h2 {
    font-size: var(--fs-2xl);
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-gray);
    margin-bottom: 18px;
}
.detail-desc {
    margin-bottom: 24px;
    max-width: 800px;
}
.detail-param {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 14px 24px;
    margin-bottom: 28px;
}
.detail-param li {
    display: contents;
}
.detail-param li span:first-child {
    font-weight: 700;
    color: var(--text-gray);
    min-width: 80px;
}
.download-box {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ----- 标签栏 ----- */
.product-tab-bar {
    margin-top: 0 !important;
    background: var(--bg-light);
    padding: 18px 0;
}
.tab-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}
.tab-item {
    padding: 9px 20px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    background: var(--white);
    transition: border-color var(--ease), color var(--ease), background var(--ease);
    cursor: pointer;
}
.tab-item:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}
.tab-item.active {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

/* ----- 详情内容 ----- */
.detail-wrap {
    max-width: 1200px;
    margin: 0 auto;
}
.detail-title-block {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin: 36px 16px 16px;
    border-left: 4px solid var(--primary-blue);
    padding-left: 12px;
}
.detail-title {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin: 28px 16px 12px;
}
.text-desc {
    margin-bottom: 12px;
    max-width: 800px;
}
.product-detail {
    padding: 0 16px;
}

/* ----- 通用列表（圆点）----- */
.common-ul {
    padding-left: 0;
    line-height: 1.85;
    color: var(--text-light);
    list-style: none;
}
.common-ul li {
    padding: 4px 0 4px 26px;
    position: relative;
    margin-bottom: 2px;
    transition: transform 0.2s ease;
}
.common-ul li::before {
    content: "▹";
    color: var(--primary-blue);
    position: absolute;
    left: 4px;
    top: 4px;
    font-weight: 700;
    font-size: 1.15em;
}
.common-ul li:hover {
    transform: translateX(2px);
}

/* ----- 表格 ----- */
.spec-table,
.file-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 28px;
}
.spec-table td,
.file-table th,
.file-table td {
    border: 1px solid var(--border-light);
    padding: 12px;
}
.file-table thead {
    background: var(--bg-light);
}
.operate-box a {
    color: var(--primary-blue);
    transition: color var(--ease);
}
.operate-box a:hover {
    color: var(--primary-dark);
}
.download-svg {
    width: 20px;
    height: 20px;
    stroke-width: 2.2;
}

/* ----- 标签 ----- */
.tag-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 16px 0;
}
.tag-item {
    padding: 6px 14px;
    background: var(--bg-tag);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    color: var(--text-gray);
    transition: background var(--ease), color var(--ease),
        transform var(--ease), box-shadow var(--ease);
    font-weight: 500;
    letter-spacing: 0.3px;
    border: 1px solid transparent;
    cursor: default;
}
.tag-item:hover {
    background: var(--primary-dark);
    color: var(--white);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(15, 52, 96, 0.15);
}

/* ============================================================
   页面容器
   ============================================================ */
.page-wrapper {
    background: var(--white);
    box-shadow: 0 0 35px rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    max-width: 1280px;
    margin: var(--header-height) auto 0;
    padding: 0;
    position: relative;
    overflow: hidden;
}
@media (max-width: 1366px) {
    .page-wrapper {
        padding: 0 8px;
    }
}
@media (max-width: 768px) {
    .page-wrapper {
        box-shadow: none;
        border-radius: 0;
        max-width: 100%;
        padding: 0;
    }
}

/* ============================================================
   优点水平卡片（保留，与下方独立列表共存）
   ============================================================ */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-lg);
    max-width: 1200px;
    margin: 0 auto;
}
.advantage-card {
    background: var(--white);
    border-radius: 16px;
    padding: var(--sp-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    text-align: left;
    position: relative;
    overflow: hidden;
}
.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.advantage-number {
    font-size: 3.6rem;
    font-weight: 700;
    color: var(--primary-blue);
    opacity: 0.20;
    line-height: 1;
    margin-bottom: 4px;
    letter-spacing: -1px;
}
.advantage-card h4 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin-bottom: var(--sp-sm);
}
.advantage-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.advantage-card ul li {
    padding: 4px 0 4px 22px;
    position: relative;
    font-size: var(--fs-sm);
    line-height: 1.7;
    color: var(--text-mid);
}
.advantage-card ul li::before {
    content: "▸";
    position: absolute;
    left: 2px;
    color: var(--primary-blue);
    font-weight: 700;
}
@media (max-width: 992px) {
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 576px) {
    .advantage-grid {
        grid-template-columns: 1fr;
        gap: var(--sp-md);
    }
    .advantage-number {
        font-size: 2.8rem;
    }
}

/* ============================================================
   浮动卡片 / 荣誉资质
   ============================================================ */
.float-card-box {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    padding: var(--sp-xl);
    transition: box-shadow var(--ease);
}
.float-card-box:hover {
    box-shadow: var(--shadow-md);
}
.float-card-box--sm {
    border-radius: var(--radius-md);
    padding: var(--sp-lg);
}
.float-card-box--lift {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    padding: var(--sp-xl);
    transition: transform var(--ease), box-shadow var(--ease);
}
.float-card-box--lift:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.float-card-box--light {
    background: var(--bg-soft);
    border-radius: 16px;
    padding: var(--sp-xl);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--ease);
}
.float-card-box--light:hover {
    box-shadow: var(--shadow-md);
}
@media (max-width: 768px) {
    .float-card-box,
    .float-card-box--lift,
    .float-card-box--light {
        padding: var(--sp-md);
        border-radius: var(--radius-md);
    }
    .float-card-box--sm {
        padding: var(--sp-md);
    }
}

.section.card-section > .container {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    padding: var(--sp-xl) var(--sp-lg);
    transition: transform var(--ease), box-shadow var(--ease);
}
.section.card-section > .container:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.section.no-float-card > .container {
    background: transparent;
    box-shadow: none;
    padding: 0 var(--sp-sm);
    transform: none;
}
@media (max-width: 768px) {
    .section.card-section > .container {
        padding: var(--sp-md) var(--sp-sm);
        border-radius: var(--radius-md);
    }
}

/* ----- 荣誉资质网格 ----- */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--sp-lg);
}
.honor-card {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--sp-md);
    transition: transform var(--ease), box-shadow var(--ease);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.honor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.honor-img {
    width: 100%;
    height: 180px;
    overflow: hidden;
    border-radius: var(--radius-sm);
    margin-bottom: var(--sp-sm);
    cursor: zoom-in;
    background: var(--white);
}
.honor-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform var(--ease);
}
.honor-img:hover img {
    transform: scale(1.03);
}
.honor-card h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-gray);
    margin-bottom: 4px;
}
.honor-card p {
    font-size: calc(var(--fs-sm) * 0.9);
    color: var(--text-light);
    flex-grow: 1;
}

@media (max-width: 1400px) {
    .honor-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media (max-width: 1100px) {
    .honor-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 768px) {
    .honor-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-md);
    }
    .honor-img {
        height: 160px;
    }
}
@media (max-width: 480px) {
    .honor-grid {
        grid-template-columns: 1fr;
    }
    .honor-img {
        height: 140px;
    }
}

/* ============================================================
   特性列表（带数字序号，左对齐）
   ============================================================ */
.feature-list {
    counter-reset: feature-counter;
    list-style: none;
    max-width: 900px;
    margin-left: 0;
    padding: 0;
}
.feature-list li {
    counter-increment: feature-counter;
    position: relative;
    padding: 16px 20px 16px 70px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--sp-sm);
    transition: transform 0.25s, box-shadow 0.25s;
    font-size: var(--fs-sm);
    line-height: 1.7;
    color: var(--text-mid);
    text-align: left;
}
.feature-list li:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.feature-list li::before {
    content: counter(feature-counter);
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
    opacity: 0.30;
    line-height: 1;
}
.feature-list li h4 {
    font-size: var(--fs-md);
    font-weight: 600;
    color: var(--text-gray);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}
.feature-list li p {
    margin-top: 4px;
    margin-bottom: 0;
    letter-spacing: 0.3px;
}
.feature-list li p + p {
    margin-top: 8px;
}
.feature-list li strong,
.feature-list li p strong {
    color: var(--text-gray);
    font-weight: 600;
}
@media (max-width: 768px) {
    .feature-list li {
        padding: 14px 14px 14px 56px;
        font-size: calc(var(--fs-sm) * 0.95);
    }
    .feature-list li::before {
        font-size: 1.5rem;
        left: 14px;
    }
    .feature-list li p {
        font-size: calc(var(--fs-sm) * 0.95);
    }
}

/* ============================================================
   功能原理图 - 规格列表（纯圆点，左对齐）
   ============================================================ */
.solution-text .spec-list {
    list-style: none;
    padding-left: 0;
    margin: 8px 0 0 0;
}
.solution-text .spec-list li {
    font-size: var(--fs-base);
    line-height: 1.9;
    color: var(--text-mid);
    padding: 2px 0 2px 22px;
    position: relative;
    margin-bottom: 0;
}
.solution-text .spec-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 700;
    color: var(--primary-blue);
    font-size: inherit;
    line-height: inherit;
}
@media (max-width: 576px) {
    .solution-text .spec-list li {
        padding-left: 18px;
        font-size: calc(var(--fs-base) * 0.95);
    }
    .solution-text .spec-list li::before {
        font-size: 0.95em;
    }
}

/* ============================================================
   产品优势列表（独立有序列表 - 左对齐）
   与 .advantage-grid 并存，用于不同场景
   ============================================================ */
.advantage-module-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 16px;
}
.advantage-module-wrapper .module-title {
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--text-black);
    margin-bottom: 24px;
    text-align: left;
    letter-spacing: 0.5px;
}
@media (max-width: 768px) {
    .advantage-module-wrapper .module-title {
        font-size: var(--fs-2xl);
    }
}

.advantage-list-module {
    counter-reset: adv-counter;
    list-style: none;
    max-width: 900px;
    margin: 0;
    padding: 0;
}
.advantage-list-module li {
    counter-increment: adv-counter;
    position: relative;
    padding: 18px 24px 18px 76px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 16px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    font-size: var(--fs-base);
    line-height: 1.8;
    color: var(--text-mid);
    border-left: 4px solid transparent;
}
.advantage-list-module li:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.advantage-list-module li::before {
    content: counter(adv-counter);
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    opacity: 0.30;
    line-height: 1;
    font-family: "Helvetica Neue", Arial, sans-serif;
}
.advantage-list-module li strong {
    color: var(--primary-dark);
    font-weight: 600;
}
@media (max-width: 768px) {
    .advantage-list-module li {
        padding: 14px 16px 14px 62px;
        font-size: calc(var(--fs-base) * 0.95);
        line-height: 1.7;
        margin-bottom: 12px;
        border-radius: var(--radius-md);
    }
    .advantage-list-module li::before {
        font-size: 1.6rem;
        left: 16px;
    }
}
@media (max-width: 480px) {
    .advantage-list-module li {
        padding: 12px 14px 12px 52px;
        font-size: calc(var(--fs-sm) * 0.95);
    }
    .advantage-list-module li::before {
        font-size: 1.4rem;
        left: 12px;
    }
}

/* ============================================================
   移动端辅助
   ============================================================ */
body.nav-open {
    overflow: hidden;
}

.nav-item .arrow,
.second-item .arrow {
    flex: 0 0 40px;
    text-align: center;
}
.nav-list {
    user-select: none;
}

/* 点击涟漪效果（移动端） */
/* .ripple {
    position: absolute;
    border-radius: 50%;
    background: var(--primary-blue-light);
    transform: scale(0);
    animation: rippleAnim 0.6s ease-out forwards;
    pointer-events: none;
    width: 100px;
    height: 100px;
    margin-left: -50px;
    margin-top: -50px;
    top: 50%;
    left: 50%;
} */
@keyframes rippleAnim {
    to {
        transform: scale(4);
        opacity: 0;
    }
}