/* 全局平滑滚动 */
html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 定义色彩变量 - 核心色系 */
:root {
    /* 页面背景 */
    --bg-body: #ffffff;
    --bg-card: #ffffff;
    /* 统一天际蓝基调 - 用于图标、卡片背景等 */
    --bg-icon-area: #F0F9FF; /* 极淡天际蓝 */
    --bg-section: #F0F9FF; /* Stats区背景 */
    --bg-hover: #E0F2FE; /* 悬浮色 (稍深一点的蓝) */
    --bg-footer: #374151; /* 深色Footer背景 */

    --border-subtle: #e2e8f0;
    --border-hover: #BAE6FD;
    /* 优化 1：将大标题颜色从深蓝黑 (#0F172A) 调整为柔和的深灰 (#334155) */
    --text-title: #334155;
    --text-desc: #64748B;
    --text-accent: #0EA5E9; /* 天际蓝 (主题色) */

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 10px 15px -5px rgba(14, 165, 233, 0.15), 0 10px 10px -5px rgba(14, 165, 233, 0.1);
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: var(--bg-body);
    min-height: 1440px;
    padding: 0;
    color: #333;
    overflow-x: scroll;
}

/* 通用容器 */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 60px 40px 40px;
    position: relative;
}

/* =========================================
      "乐其云"使用的字体
   =========================================*/
@font-face {
    font-family: 'LogoTextFont';
    src: url('/fonts/leqiyun.otf') format('opentype');
}

/* -----------------------
           顶部导航栏样式
           ----------------------- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: rgba(255,255,255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 2000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    /* 初始状态：透明背景，无阴影 */
    background: transparent;
    box-shadow: none;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 100px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 5px;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--text-accent) 0%, #0099CC 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
    box-shadow: 0 4px 10px rgba(14, 165, 233, 0.4);
    flex-shrink: 0;
}

.logo-text {
    font-family: 'LogoTextFont', 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: 30px;
    font-weight: 400;
    background: linear-gradient(135deg, #0F172A 0%, var(--text-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    white-space: nowrap;
}

.main-nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    margin-left: 20px;
}

    .main-nav ul {
        display: flex;
        list-style: none;
        gap: 24px;
        align-items: center;
        white-space: nowrap;
    }

    .main-nav li {
        position: relative;
        display: flex;
        align-items: center;
        gap: 12px;
    }

.nav-link {
    text-decoration: none;
    color: #334155;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 0;
    white-space: nowrap;
    cursor: pointer;
}

    .nav-link:hover {
        color: var(--text-accent);
    }

.arrow-down {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.dropdown.active .arrow-down {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(15px);
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    width: auto;
    min-width: 1100px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    padding: 30px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid #f1f5f9;
    justify-content: flex-start;
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(20px);
}

.dropdown-item {
    display: flex;
    flex: 0 0 auto;
    min-width: 300px;
    padding: 12px 24px;
    color: #475569;
    text-decoration: none;
    font-size: 13px;
    transition: all 0.2s ease;
    background: var(--bg-icon-area);
    border-radius: 12px;
    text-align: left;
    border: 1px solid transparent;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    height: auto;
    min-height: 88px;
    white-space: nowrap;
}

    .dropdown-item:hover {
        background: var(--bg-hover);
        color: var(--text-accent);
        border-color: var(--border-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(14, 165, 233, 0.1);
    }

.dropdown-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    background-color: transparent;
    border: none;
}

    .dropdown-item-icon img {
        width: 64px;
        height: 64px;
        display: block;
        object-fit: contain;
    }

.dropdown-item_title {
    font-weight: 700;
    font-size: 14px;
    line-height: 1.4;
    color: #64748B;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-accent);
    font-weight: 700;
    font-size: 16px;
    padding-left: 20px;
    border-left: 1px solid #e2e8f0;
    height: 20px;
    white-space: nowrap;
}

.phone-icon {
    width: 18px;
    height: 18px;
    color: var(--text-accent);
}

.svg-icon {
    color: var(--text-accent);
    fill: #1296db
}

/* =========================================
           导航栏变色逻辑样式
   ========================================= */

/* 状态1：未滚动 (透明背景，白色文字) */
.main-header:not(.scrolled) .nav-link {
    color: #ffffff;
}

    .main-header:not(.scrolled) .nav-link:hover {
        color: #E0F2FE;
    }

.main-header:not(.scrolled) .logo-text {
    color: #ffffff;
    background: none; /* 移除渐变 */
    -webkit-text-fill-color: #ffffff;
}

.main-header:not(.scrolled) .nav-phone {
    color: #ffffff;
    border-left: 1px solid rgba(255,255,255,0.4);
}

.main-header:not(.scrolled) .phone-icon {
    color: #ffffff;
}

.main-header:not(.scrolled) .logo-icon {
    background: transparent;
    border: none;
    box-shadow: none;
}

.main-header:not(.scrolled) .logo-icon .svg-logo {
    fill: #ffffff;
}

/* 状态2：已滚动 (白色背景，恢复原色) */
.main-header.scrolled {
    background: rgba(255,255,255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.main-header.scrolled .nav-link {
    color: #6b7280;
}

    .main-header.scrolled .nav-link:hover {
        color: var(--text-accent);
    }

.main-header.scrolled .logo-text {
    background: linear-gradient(135deg, #0F172A 0%, var(--text-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-header.scrolled .nav-phone {
    color: var(--text-accent);
    border-left: 1px solid #e2e8f0;
}

.main-header.scrolled .phone-icon {
    color: var(--text-accent);
}

.main-header.scrolled .logo-icon {
    background: transparent;
    border: none;
    box-shadow: none;
}

.main-header.scrolled .logo-icon .svg-logo {
    fill: var(--text-accent);
}

/* -----------------------
           顶部 Hero 区域 (流星 + 动态平衡星座版)
           ----------------------- */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #0369a1 30%, #0EA5E9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    perspective: 1200px;
    padding-top: 80px;
}

/* Canvas 星座动画容器 */
#constellation-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1; /* 在背景之上，流星之下 */
    pointer-events: none;
}

/* 流星样式 */
.meteor {
    position: absolute;
    height: 2px;
    width: 100px;
    /* 使用 CSS 变量 --meteor-color 来定义颜色 */
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, var(--meteor-color, rgba(255,255,255,0.6)) 90%, #ffffff 100%);
    border-radius: 0 2px 2px 0;
    z-index: 3;
    pointer-events: none;
    opacity: 0;
    /* 优化：使用 transform 定位，初始不设置 top/left */
    top: 0;
    left: 0;
    will-change: transform, opacity; /* 提示浏览器开启硬件加速 */
}

    /* 流星头部 */
    .meteor::before {
        content: '';
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 4px;
        height: 4px;
        background: #ffffff;
        border-radius: 50%;
        /* 
               优化：减少 box-shadow 层数和模糊半径以提升性能 
               原为4层叠加，现简化为2层
            */
        box-shadow: 0 0 10px var(--meteor-color, rgba(255,255,255,1)), 0 0 20px var(--meteor-color, rgba(255,255,255,0.5));
    }

.hero-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 1400px;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.hero-text {
    flex: 0 0 auto;
    max-width: 600px;
    color: #ffffff;
    animation: slideInLeft 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    margin-right: 20px;
}

/* 主标题 */
.hero_title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, #0EA5E9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleFadeIn 1s cubic-bezier(0.2, 0.8, 0.2, 1), titleColorShift 3s ease-in-out infinite alternate;
    text-shadow: 0 0 15px rgba(14, 165, 233, 0.3);
    position: relative;
}

@keyframes titleFadeIn {
    0% {
        opacity: 0;
        transform: translateY(-20px);
        filter: blur(10px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

@keyframes titleColorShift {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 100% 50%;
    }
}

.hero_subtitle {
    font-size: 16px;
    font-weight: 400;
    color: #CBD5E1;
    color: #FFFFFF;
    margin-bottom: 30px;
    line-height: 1.6;
    text-align: justify;
}

.hero_buttons {
    display: flex;
    gap: 16px;
}

.btn-hero {
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #0EA5E9 0%, #0099CC 100%);
    color: #ffffff;
    border: 1px solid rgba(14, 165, 233, 0.4);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 30px rgba(14, 165, 233, 0.4);
    }

.btn-secondary {
    background: rgba(255,255,255, 0.1);
    color: #E2E8F0;
    border: 1px solid rgba(14, 165, 233, 0.3);
    backdrop-filter: blur(5px);
}

    .btn-secondary:hover {
        background: rgba(255,255,255, 0.15);
        border-color: #0EA5E9;
        color: #fff;
    }

/* -----------------------
           旋转木马 (3D Carousel - 明亮蓝玻璃版)
           ----------------------- */
.hero-visual {
    flex: 0 0 auto;
    width: 800px;
    height: 600px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1200px;
    margin-left: auto;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

    .hero-visual:active {
        cursor: grabbing;
    }

.carousel-scene {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transform: rotateY(0deg) rotateX(20deg) translateY(-40px);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.card-3d {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 280px;
    height: 200px;
    margin-top: -100px;
    margin-left: -140px;
    transform-style: preserve-3d;
    border-radius: 16px;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

    .card-3d:nth-child(1) {
        transform: rotateY(0deg) translateZ(250px);
    }

    .card-3d:nth-child(2) {
        transform: rotateY(72deg) translateZ(250px);
    }

    .card-3d:nth-child(3) {
        transform: rotateY(144deg) translateZ(250px);
    }

    .card-3d:nth-child(4) {
        transform: rotateY(216deg) translateZ(250px);
    }

    .card-3d:nth-child(5) {
        transform: rotateY(288deg) translateZ(250px);
    }

.card-faces {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    height: 200px;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.face {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    height: 200px;
    transform-style: preserve-3d;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.front {
    z-index: 2;
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid rgba(14, 165, 233, 0.3);
    box-shadow: 0 0 15px rgba(14, 165, 233, 0.1), inset 0 0 20px rgba(0,0,0,0.1);
    backdrop-filter: blur(5px);
}

.back {
    transform: rotateY(180deg);
    z-index: 1;
    background: linear-gradient(135deg, #0099CC 0%, #38BDF8 100%);
    border: 1px solid #38BDF8;
    color: white;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.face::before {
    content: '';
    position: absolute;
    top: 0;
    right: -8px;
    width: 8px;
    height: 100%;
    background: linear-gradient(to right, rgba(59, 130, 246, 0.3), rgba(255,255,255,0.1));
    transform: rotateY(90deg);
    transform-origin: left;
}

.face::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 8px;
    background: linear-gradient(to bottom, rgba(59, 130, 246, 0.3), rgba(255,255,255,0.1));
    transform: rotateX(90deg);
    transform-origin: top;
}

.back::before {
    content: '';
    position: absolute;
    top: 0;
    left: -8px;
    width: 8px;
    height: 100%;
    background: linear-gradient(to left, rgba(0,0,0,0.3), rgba(255,255,255,0.1));
    transform: rotateY(-90deg);
    transform-origin: right;
}

.back::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 8px;
    background: linear-gradient(to top, rgba(0,0,0,0.3), rgba(255,255,255,0.1));
    transform: rotateX(-90deg);
    transform-origin: bottom;
}

.card-top {
    flex: 0 0 134px;
    width: 100%;
    background: rgba(56, 189, 248, 0.15);
    border-radius: 16px 16px 0 0;
    border-bottom: 1px solid rgba(56, 189, 248, 0.2);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-bottom {
    flex: 0 0 66px;
    width: 100%;
    background: linear-gradient(180deg, rgba(14, 165, 233, 0.6) 0%, rgba(56, 189, 248, 0.25) 100%);
    border-radius: 0 0 16px 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 0 36px;
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: #ffffff;
    line-height: 1.2;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.card-desc {
    font-size: 13px;
    color: #e0f2fe;
    line-height: 1.2;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.back .card-top {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 16px 16px 0 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.back .card-img {
    transform: scaleX(-1);
    filter: brightness(1.1);
    opacity: 1;
}

.back .card-title {
    color: #ffffff;
    transform: scaleX(-1);
}

.back .card-desc {
    color: #f0f9ff;
    transform: scaleX(-1);
    text-align: right;
}

.card-img {
    width: 80%;
    height: 80%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    pointer-events: none;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 核心数据区 */
.stats-section {
    background: #F0F9FF;
    padding: 60px 40px;
    margin-bottom: 60px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.02);
    border-bottom: 1px solid #f1f5f9;
}

.stats-grid {
    max-width: 1300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: #E0F2FE;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0EA5E9;
    margin-bottom: 10px;
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.1;
    background: linear-gradient(135deg, #0EA5E9, #0099CC);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 16px;
    color: #64748b;
    font-weight: 500;
}

/* 为什么选择我们 */
.why-choose-section {
    margin-bottom: 80px;
}

/* 优化 1：全局大标题颜色调整 (使用 --text-title) */
.section-title {
    text-align: center;
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

    .section-title::after {
        content: '';
        display: block;
        width: 40px;
        height: 0px;
        background: var(--text-accent);
        margin: 10px auto 0;
        border-radius: 2px;
    }

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    padding: 30px 24px;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    text-align: center;
}

.feature-icon-box {
    background: transparent;
    width: 80px;
    height: 80px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-accent);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 12px;
}

.feature_desc {
    font-size: 14px;
    color: var(--text_desc);
    line-height: 1.6;
}

/* =========================================
           产品列表 - 一行3个，四方型卡片
           ========================================= */
.products_header {
    margin-bottom: 50px;
}
/* 优化 1：全局大标题颜色调整 */
.products_title {
    text-align: center;
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

    .products_title::after {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--text_accent);
        margin: 10px auto 0;
        border-radius: 2px;
    }

.products_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.product-card {
    background: var(--bg_card);
    border-radius: 16px;
    box-shadow: var(--shadow_md);
    display: flex;
    flex-direction: column;
    min-height: 420px;
    border: 1px solid #E2E8F0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

    .product-card:hover {
        box-shadow: var(--shadow_hover);
        border-color: #0EA5E9;
        transform: translateY(-5px);
        background-color: #F0F9FF;
    }

.product_icon {
    width: 100%;
    height: 180px;
    background: var(--bg-icon-area);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px 16px 0 0;
    transition: background-color 0.3s ease;
}

.product-card:hover .product_icon {
    background-color: #E0F2FE;
}

.product_icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform 0.3s ease;
}

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

.product_info {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: #fff;
    border-radius: 0 0 16px 16px;
    transition: background-color 0.3s ease;
}

.product-card:hover .product_info {
    background-color: #F0F9FF;
}

.product_name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 12px;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.product-card:hover .product_name {
    color: var(--text_accent);
}

.product_description {
    color: var(--text_desc);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
    transition: color 0.3s ease;
    text-align: justify;
}

.product-card:hover .product_description {
    color: #475569;
}

.button_group {
    display: flex;
    gap: 10px;
    margin-top: auto;
    flex-wrap: wrap;
}

.btn {
    flex: 1;
    padding: 10px 0;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-download {
    background: #38BDF8;
    color: white;
    box-shadow: 0 2px 4px rgba(56, 189, 248, 0.3);
}

    .btn-download:hover {
        background: #0EA5E9;
        box-shadow: 0 4px 6px rgba(14, 165, 233, 0.35);
    }

.btn-detail {
    background: #F1F5F9;
    color: #475569;
    border: 1px solid #E2E8F0;
}

    .btn-detail:hover {
        background: #E2E8F0;
        color: #0F172A;
        border-color: #CBD5E1;
    }

.btn-price {
    background: #fff7ed;
    color: #ea580c;
    border: 1px solid #ffedd5;
}

    .btn-price:hover {
        background: #ffedd5;
        border-color: #fdba74;
    }

/* =========================================
新增板块：支持量身定制的系统
========================================= */
.custom-systems-section {
    padding: 80px 0;
    background: #ffffff;
    border-top: 1px solid #f1f5f9;
}

.custom-systems-header {
    text-align: center;
    margin-bottom: 50px;
}

.custom-systems-title {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    position: relative;
    display: inline-block;
}

.custom-systems-subtitle {
    font-size: 15px;
    color: var(--text-desc);
    margin-top: 16px;
}

.custom-systems-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.system-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: default;

    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
    border-color: #BAE6FD;
    /*background: #F8FAFC;*/
}

    .system-card:hover {
        
    }

.system-icon-box {
    width: 64px;
    height: 64px;
    background: var(--bg-icon-area);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--text-accent);
    transition: background-color 0.3s ease;

    background: var(--bg-hover);
}

.system-card:hover .system-icon-box {
    
}

.system-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-title);
    line-height: 1.4;
}

/* =========================================
           覆盖行业区域
           ========================================= */
.industries-section {
    padding: 40px 0 80px;
    background: linear-gradient(180deg, #ffffff 0%, #F0F9FF 100%);
}

.industries_header {
    text-align: center;
    margin-bottom: 50px;
}

/* 优化 1：全局大标题颜色调整 */
.industries_title {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    position: relative;
    display: inline-block;
}

    .industries_title::after {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--text_accent);
        margin: 10px auto 0;
        border-radius: 2px;
    }

.industries_subtitle {
    font-size: 15px;
    color: var(--text_desc);
    margin-top: 16px;
}

.industries_grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 0 40px;
}

.industry-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

.industry-icon {
    width: 96px;
    height: 96px;
    background: var(--bg-icon-area);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-accent);
}

.industry_name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 8px;
}


/* 技术生态 */
.partners-section {
    padding: 60px 0;
    margin-bottom: 60px;
    border: 1px solid var(--border-subtle);
    background: #fafafa;
    text-align: center;
}

.partners_title {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    position: relative;
    display: inline-block;
}

    .partners_title::after {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--text_accent);
        margin: 10px auto 0;
        border-radius: 2px;
    }





.partners_content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.partner_category {
    width: 100%;
}

.partner_list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.partner_tag {
    background: white;
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    color: var(--text_desc);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

    .partner_tag svg {
        width: 20px;
        height: 20px;
        color: #94a3b8;
    }

.partners-section .section-title {
    margin-bottom: 60px;
}

/* 客户证言 */
.testimonials-section {
    margin-bottom: 80px;
}

    .testimonials-section .section-title {
        margin-bottom: 70px;
    }

.testimonials_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: #fff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-subtle);
    position: relative;
}

.quote-icon {
    color: var(--text-accent);
    font-size: 40px;
    position: absolute;
    top: 20px;
    left: 20px;
    font-family: serif;
}

.testimonial_text {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
    margin-bottom: 24px;
    padding-top: 10px;
    font-style: italic;
    text-align: left;
}

.testimonial-user {
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: center;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 2px;
}

.user-info p {
    font-size: 13px;
    color: var(--text_desc);
}

/* 成功客户板块 */
.customers_section {
    padding: 60px 0;
    margin-bottom: 60px;
    overflow: hidden;
}
/* 优化 1：全局大标题颜色调整 */
.customers_title {
    text-align: center;
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

    .customers_title::after {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--text_accent);
        margin: 10px auto 0;
        border-radius: 2px;
    }

.customers_row {
    margin-bottom: 24px;
}

.customers-scroll_track {
    display: flex;
    width: fit-content;
}

.customers-scroll_track:hover {
    animation-play-state: paused;
}

@keyframes scrollLeft {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

@keyframes scrollRight {
    0% {
        transform: translateX(-50%);
    }

    100% {
        transform: translateX(0);
    }
}

.row-odd {
    animation: scrollRight 75s linear infinite;
}

.row-even {
    animation: scrollLeft 75s linear infinite;
}

.customer-logo {
    background: #ffffff;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    width: 250px;
    height: 80px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 20px;
    margin-right: 20px;
    position: relative;
    cursor: pointer;
    flex-shrink: 0;
}

    .customer-logo img {
        width: 50px;
        height: 50px;
        object-fit: contain;
        border-radius: 10px;
        background-color: transparent;
        padding: 0;
        opacity: 0.8;
    }

.company_name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-title);
    /*white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;*/
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
}

/* 底部 CTA */
.cta_section {
    background: linear-gradient(135deg, #0099CC 0%, #007799 100%);
    border-radius: 24px;
    padding: 60px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 60px;
    color: white;
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.25);
    position: relative;
    overflow: hidden;
}

    .cta_section::before {
        content: '';
        position: absolute;
        top: -50px;
        right: -50px;
        width: 300px;
        height: 300px;
        background: rgba(255,255,255,0.1);
        border-radius: 50%;
    }

.cta_content {
    flex: 1;
    padding-right: 60px;
}

.cta_title {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta_desc {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 0;
}

.cta-form_container {
    width: 380px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.2);
}

.form-group {
    margin-bottom: 16px;
}

.form_input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 8px;
    border: none;
    background: white;
    color: #333;
    font-size: 15px;
    outline: none;
    transition: box-shadow 0.2s;
}

    .form_input:focus {
        box-shadow: 0 0 0 3px rgba(255,255,255,0.5);
    }

.btn-cta {
    width: 100%;
    padding: 14px;
    background: #fbbf24;
    color: #064e3b;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

    .btn-cta:hover {
        background: #f59e0b;
        transform: translateY(-2px);
    }

/* Footer */
footer {
    text-align: center;
    padding: 40px;
    background: var(--bg-footer);
    color: #FFFFFF;
    font-size: 15px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 -10px 40px rgba(0,0,0,0.05);
}

.footer-link {
    text-decoration: none;
    color:white;
}

.footer-link:hover {
    text-decoration: underline;
    color: var(--text-accent);
}