/* ========================================
           基础重置与字体
           ======================================== */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Inter', 'Microsoft YaHei', 'PingFang SC', sans-serif;
            line-height: 1.6;
            /* 深空蓝基底：.page-cosmos 实际提供 fixed 全屏背景，此处兜底 */
            background: #04102a;
            color: #fff;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { text-decoration: none; color: inherit; }
        button { cursor: pointer; border: none; font-family: inherit; }
        ul, ol { list-style: none; }
        img { max-width: 100%; height: auto; }
        
        /* ========================================
           设计系统变量 (BEM 规范)
           ======================================== */
        :root {
            /* 品牌色 */
            --brand-deep: #003B73;
            --brand-bright: #00A5FF;
            --brand-orange: #FF6B35;
            --success-green: #10B981;
            --warning-yellow: #F59E0B;
            --error-red: #EF4444;
            --info-blue: #3B82F6;
            
            /* 中性色 */
            --text-black: #000000;
            --text-dark: #333333;
            --text-medium: #666666;
            --text-light: #999999;
            --border-gray: #E5E7EB;
            --bg-gray: #F5F5F5;
            --bg-white: #FFFFFF;
            
            /* 阴影 */
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-hover: 0 20px 40px rgba(0,0,0,0.08);
            --shadow-nav: 0 1px 10px rgba(0,0,0,0.08);
            
            /* 圆角 */
            --radius-card: 16px;
            --radius-button: 12px;
            --radius-input: 8px;
            
            /* 间距 */
            --space-section-pc: 120px;
            --space-section-tablet: 100px;
            --space-section-mobile: 80px;
            --pad-card: 32px;
            --pad-button: 16px 40px;
            --gap-card-pc: 32px;
            --gap-card-mobile: 24px;
        }
        
        /* ========================================
           工具类
           ======================================== */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 40px;
        }
        
        .section {
            padding: var(--space-section-pc) 0;
        }
        
        .section__header {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section__title {
            font-size: 48px;
            font-weight: 700;
            color: var(--text-black);
            line-height: 1.2;
            margin-bottom: 16px;
        }
        
        .section__subtitle {
            font-size: 18px;
            color: var(--text-medium);
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: var(--pad-button);
            border-radius: var(--radius-button);
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        
        .btn--primary {
            background: var(--brand-orange);
            color: #fff;
        }
        
        .btn--primary:hover {
            background: #E55A24;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255,107,53,0.3);
        }
        
        .btn--secondary {
            background: var(--brand-bright);
            color: #fff;
        }
        
        .btn--secondary:hover {
            background: #0094E6;
            transform: translateY(-2px);
        }
        
        .btn--outline {
            background: transparent;
            color: var(--brand-bright);
            border: 2px solid var(--brand-bright);
        }
        
        .btn--outline:hover {
            background: var(--brand-bright);
            color: #fff;
        }
        
        .btn--white {
            background: #fff;
            color: var(--brand-deep);
            font-weight: 700;
        }
        
        .btn--white:hover {
            background: #f0f0f0;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        
        /* 滚动渐入动画 */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* ========================================
           1. 导航栏 (Navbar)
           ======================================== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        
        .navbar.scrolled {
            background: rgba(8, 18, 40, 0.65);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        
        .navbar__inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 16px 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .navbar__logo {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: color 0.3s ease;
            text-decoration: none;
        }
        
        .navbar.scrolled .navbar__logo {
            color: #fff;
        }
        
        .navbar__logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--brand-deep), var(--brand-bright));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            flex-shrink: 0;
        }
        
        .navbar__links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }
        
        .navbar__link {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255,255,255,0.9);
            transition: color 0.2s ease;
            text-decoration: none;
            position: relative;
        }
        
        .navbar.scrolled .navbar__link {
            color: rgba(255,255,255,0.92);
        }
        
        .navbar__link:hover {
            color: var(--brand-bright);
        }
        
        .navbar.scrolled .navbar__link:hover {
            color: var(--brand-bright);
        }
        
        /* CTA 与 lang-toggle 同款造型（不同色）。
           关键：两者必须规则完全镜像才能像素级对齐。同一基线：
           - 同样的 padding (10px 24px)
           - 同样的 font-size/font-weight/font-family/line-height
           - 同样的 display:inline-flex + align-items:center（让 line-height=1 也把字竖直居中）
           - 同样的 min-height: 40px（防止 <button> UA 默认 min-height 偷涨）
           - 同样的 box-sizing: border-box
           - lang-toggle 额外需 appearance:none + border:0（去掉 UA 默认外观） */

        .navbar__cta {
            background: var(--brand-orange);
            color: #fff !important;
            padding: 10px 24px;
            border-radius: var(--radius-button);
            font-size: 14px;
            font-weight: 600;
            font-family: inherit;
            line-height: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 40px;
            box-sizing: border-box;
            text-decoration: none;
            transition: background 0.2s ease;
        }

        .navbar__cta:hover {
            background: #E55A24;
        }

        .navbar__lang-toggle {
            background: var(--brand-bright);
            color: #fff !important;
            padding: 10px 24px;
            border: 0;
            border-radius: var(--radius-button);
            font-size: 14px;
            font-weight: 600;
            font-family: inherit;
            line-height: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 40px;
            box-sizing: border-box;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
        }
        
        .navbar__lang-toggle:hover {
            background: #0088D4;
            transform: translateY(-1px);
        }
        
        /* 移动端菜单按钮 */
        .navbar__toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            padding: 5px;
            border: none;
            cursor: pointer;
        }
        
        .navbar__toggle span {
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled .navbar__toggle span {
            background: #fff;
        }
        
        .navbar__toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        
        .navbar__toggle.active span:nth-child(2) {
            opacity: 0;
        }
        
        .navbar__toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }
        
        /* ========================================
           1.5 列表页顶部条 (Page Topbar)
           列表页（services/products/news/faq）用细条面包屑替代完整导航栏：
           左侧"← 返回首页"链接回首页，sticky 吸顶 + 深色毛玻璃。
           ======================================== */
        .page-topbar {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(8, 18, 40, 0.72);
            -webkit-backdrop-filter: blur(14px) saturate(140%);
            backdrop-filter: blur(14px) saturate(140%);
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .page-topbar__inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 40px;
            height: 56px;
            display: flex;
            align-items: center;
        }
        .page-topbar__home {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #fff;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            opacity: 0.9;
            transition: opacity 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }
        .page-topbar__home:hover {
            opacity: 1;
            color: var(--brand-bright);
            transform: translateX(-2px);
        }
        .page-topbar__arrow {
            font-size: 16px;
            line-height: 1;
        }
        @media (max-width: 768px) {
            .page-topbar__inner { padding: 0 20px; height: 52px; }
            .page-topbar__home { font-size: 13px; }
        }

        /* ========================================
           2. Hero 区域
           ======================================== */
        .hero {
            min-height: 90vh;
            min-height: 90svh;
            /* hero 自身透明：深空蓝底色由 body 提供，戴森球/星点由 .page-cosmos 全屏 fixed 渲染 */
            background: transparent;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;     /* 居中 */
            padding: 96px 40px 76px;
            position: relative;
            overflow: hidden;
        }

        /* hero 内不再放 FAQ，已迁出到留资弹层 */

        /* ===== 动态背景：戴森球 + 星际旅行（纯 CSS / GPU 合成 / 低开销） ===== */
        .hero__bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            overflow: hidden;
            pointer-events: none;
        }
        /* ===== 全局动态背景：戴森球 + 星际旅行（fixed 全屏，纯 CSS / GPU 合成 / 低开销） =====
           戴森球放大到固定在视口正中（vmin 自适应），背景星点缓慢漂移营造航行感。
           Hero 自身透明，让此层在所有 section 之上均可见（卡片毛玻璃上戴森球若隐若现）。 */
        .page-cosmos {
            position: fixed;
            inset: 0;
            z-index: -1;
            overflow: hidden;
            pointer-events: none;
            perspective: 1400px;
            perspective-origin: 50% 46%;
            background:
                radial-gradient(ellipse at 50% 100%, rgba(0, 60, 113, 0.55) 0%, transparent 55%),
                linear-gradient(180deg, #04102a 0%, #061a3e 45%, #062a55 100%);
        }
        /* 星空分两层（视差景深）：远层慢而暗、近层快而亮。
           两层均用「整层 CSS 动画」而非逐元素 opacity，保证 GPU 合成、零 CPU 负担。
           随机明灭观感由不同周期的 twinkle 错相 + 平铺渐变随机尺寸自然呈现。 */
        /* ===== 星空：双层 Canvas 粒子流（替代原 CSS 平铺渐变三层） =====
           远景层(#starfield-far) + 主层(#starfield)，共用同一引擎，各层独立
           速度/尺寸/密度/倾角系数。星星从右侧随机高度发射、向左漂移，出屏回收重置；
           每颗星独立大小/亮度/闪烁相位与速度，彻底消除平铺重复、不再整层同步闪烁。
           主层倾角系数 0.6 + 加高 210% → 初始不过扁且高倾角仍满屏；
           远景层更慢(speedScale 0.35)/更小/更暗 + 倾角系数 0.3 → 深空静谧背景。
           太阳/行星的 CSS 3D 结构不动，两 canvas 置于 .page-cosmos__scene 之前。 */
        .page-cosmos__stars-canvas {
            position: absolute;
            top: -55%;
            left: 0;
            width: 100%;
            height: 210%;                 /* (b) 加高：高倾角投影后仍基本满屏 */
            display: block;
            pointer-events: none;
            /* (a) 主层倾角系数 0.6：较原 1.0 更柔和，初始不再过扁 */
            transform: rotateX(calc(var(--sysTilt, 75deg) * 0.6));
            transform-origin: center center;
            will-change: transform;
        }
        /* 远景层：DOM 更早(位于主层之后绘制)，更慢/更小/更暗 + 倾角系数更小(0.3) */
        .page-cosmos__stars-far {
            top: -65%;
            height: 230%;
            opacity: 0.85;
            transform: rotateX(calc(var(--sysTilt, 75deg) * 0.3));
        }
        /* ===== 太阳系 ===== */
        /* 太阳系 3D 场景：sun 与 system 同处一个 preserve-3d 上下文，
           由外层 .page-cosmos 提供 perspective。两层真实深度排序：
           近端行星(translateZ>0)自动排到太阳前面，远端(translateZ<0)在太阳后面，消除穿帮。
           注意 overflow:hidden 会使 transform-style 失效，故 preserve-3d 放在此内层，不放在 .page-cosmos 上 */
        .page-cosmos__scene {
            position: absolute;
            inset: 0;
            transform-style: preserve-3d;
        }
        /* 太阳：高亮核心 + 模糊边缘（径向渐变淡出 + 柔光）+ 加大大气光晕；轻微搏动。
           位于场景正中(translateZ 0)，不受轨道倾斜影响，保持正圆球体 */
        .page-cosmos__sun {
            position: absolute;
            top: 50%;
            left: 50%;
            width: min(130px, 13vmin);
            height: min(130px, 13vmin);
            transform: translate(-50%, -50%);
            border-radius: 50%;
            background: radial-gradient(circle at 50% 48%,
                #ffffff 0%,
                #fff6d8 16%,
                #ffd64d 42%,
                #ff9d1c 70%,
                rgba(255,140,0,0.18) 100%);
            box-shadow:
                0 0 70px 18px rgba(255,206,96,0.90),
                0 0 150px 60px rgba(255,150,30,0.55),
                0 0 300px 130px rgba(255,120,0,0.32);
            filter: blur(0.4px) drop-shadow(0 0 40px rgba(255,180,80,0.85));
            animation: sunPulse 7s ease-in-out infinite;
        }
        @keyframes sunPulse {
            0%, 100% {
                filter: blur(0.4px) drop-shadow(0 0 38px rgba(255,180,80,0.80));
                box-shadow:
                    0 0 70px 18px rgba(255,206,96,0.90),
                    0 0 150px 60px rgba(255,150,30,0.55),
                    0 0 300px 130px rgba(255,120,0,0.32);
            }
            50% {
                filter: blur(0.4px) drop-shadow(0 0 54px rgba(255,190,90,0.95));
                box-shadow:
                    0 0 86px 22px rgba(255,214,110,0.95),
                    0 0 172px 72px rgba(255,160,40,0.60),
                    0 0 340px 150px rgba(255,130,0,0.36);
            }
        }
        /* 轨道平面容器：整体倾斜（默认30°，随滚动过渡到75°），preserve-3d 让子轨道进入同一 3D 空间 */
        .page-cosmos__system {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            transform: rotateX(var(--sysTilt, 75deg));
            transform-style: preserve-3d;
        }
        /* 行星轨道（同心圆，缓慢公转） */
        .orbit {
            position: absolute;
            top: 50%;
            left: 50%;
            border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.07);
            transform: translate(-50%, -50%);
            animation: orbit-spin var(--t) linear infinite;
            will-change: transform;
            transform-style: preserve-3d; /* 让行星的反向 rotateX 在真实 3D 中抵消倾斜 */
        }
        /* 行星本体：置于轨道顶端，公转时反向自转保持姿态稳定（土星环不歪） */
        .planet {
            position: absolute;
            top: 0;
            left: 50%;
            width: var(--p);
            height: var(--p);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            animation: planet-upright var(--t) linear infinite;
            will-change: transform;
        }
        @keyframes orbit-spin {
            from { transform: translate(-50%, -50%) rotate(0deg); }
            to   { transform: translate(-50%, -50%) rotate(360deg); }
        }
        @keyframes planet-upright {
            from { transform: translate(-50%, -50%) rotate(0deg) rotateX(calc(-1 * var(--sysTilt, 75deg))); }
            to   { transform: translate(-50%, -50%) rotate(-360deg) rotateX(calc(-1 * var(--sysTilt, 75deg))); }
        }
        /* 各行星：轨道直径(--d) / 公转周期(--t) / 星体大小(--p)（内快外慢） */
        .orbit--mercury { --d: 24vmin; --t: 11s;  --p: 5px;  }
        .orbit--venus   { --d: 36vmin; --t: 19s;  --p: 8px;  }
        .orbit--earth   { --d: 50vmin; --t: 29s;  --p: 9px;  }
        .orbit--mars    { --d: 64vmin; --t: 41s;  --p: 7px;  }
        .orbit--jupiter { --d: 80vmin; --t: 66s;  --p: 16px; }
        .orbit--saturn  { --d: 96vmin; --t: 90s;  --p: 13px; }
        .orbit--mercury, .orbit--venus, .orbit--earth,
        .orbit--mars, .orbit--jupiter, .orbit--saturn {
            width: var(--d);
            height: var(--d);
        }
        /* 行星外观（球面高光 + 颜色 + 微光晕） */
        .planet--mercury { background: radial-gradient(circle at 35% 32%, #d9d2c6, #8d847a); box-shadow: 0 0 6px rgba(200,190,170,0.5); }
        .planet--venus   { background: radial-gradient(circle at 35% 32%, #ffeccb, #d9a441); box-shadow: 0 0 8px rgba(255,210,130,0.5); }
        .planet--earth   { background: radial-gradient(circle at 35% 32%, #9fe0ff, #2b6fb0 70%, #1c4f86); box-shadow: 0 0 9px rgba(120,190,255,0.55); }
        .planet--mars    { background: radial-gradient(circle at 35% 32%, #ff9f73, #c1440e 75%); box-shadow: 0 0 8px rgba(255,120,70,0.5); }
        .planet--jupiter { background: radial-gradient(circle at 35% 32%, #f3ddb6, #b07b4f 80%); box-shadow: 0 0 14px rgba(220,180,130,0.5); }
        .planet--saturn  { background: radial-gradient(circle at 35% 32%, #f6e6bf, #c9a96a 80%); box-shadow: 0 0 12px rgba(220,190,130,0.5); }
        /* 土星环 */
        .planet--saturn::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 230%;
            height: 64%;
            transform: translate(-50%, -50%) rotate(-20deg);
            border: 3px solid rgba(225,205,155,0.55);
            border-radius: 50%;
            box-sizing: border-box;
        }

        .hero__content {
            position: relative;
            z-index: 2;
            margin: 0 auto;
            max-width: 720px;
            text-align: center;     /* 子元素（标题/副标题/按钮）全部居中对齐 */
        }
        
        .hero__badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            padding: 8px 20px;
            border-radius: 20px;
            font-size: 14px;
            margin-bottom: 28px;
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .hero__title {
            font-size: 72px;
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }
        
        .hero__subtitle {
            font-size: 24px;
            opacity: 0.9;
            margin: 0 0 32px;
            max-width: 620px;
            line-height: 1.5;
        }
        
        .hero__buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .hero__btn--primary {
            background: #fff;
            color: var(--brand-deep);
            padding: 18px 44px;
            border-radius: var(--radius-button);
            font-weight: 700;
            font-size: 17px;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .hero__btn--primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.2);
        }
        
        .hero__btn--secondary {
            background: rgba(255,255,255,0.15);
            color: #fff;
            padding: 18px 44px;
            border-radius: var(--radius-button);
            font-weight: 600;
            font-size: 17px;
            border: 1.5px solid rgba(255,255,255,0.3);
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .hero__btn--secondary:hover {
            background: rgba(255,255,255,0.25);
            transform: translateY(-3px);
        }

        /* Hero 单栏居中布局：FAQ 已迁出到留资弹层，内容回到垂直居中+水平居中 */
        .hero__inner {
            display: block;          /* 单栏，去掉原来的 flex 两栏 */
            width: 100%;
            max-width: 880px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            text-align: center;     /* 居中 */
        }
        /* HERO 内不再放 FAQ；FAQ 已迁移至留资弹层右侧，作为"免费咨询"触发的引导内容 */

        /* ========================================
           3. 数据统计条 (Stats Bar)
           ======================================== */
        .stats {
            /* 已去灰底：透明 section，由 body 全屏 page-cosmos 提供底色 */
            background: transparent;
            padding: 0 40px;
            margin-top: -80px;
            position: relative;
            z-index: 3;
        }
        
        .stats__inner {
            max-width: 1100px;
            margin: 0 auto;
            /* 毛玻璃悬浮卡片（不透明版，与商品/工具卡片一致） */
            background: rgba(255,255,255,0.82);
            border: 1px solid rgba(255,255,255,0.6);
            border-radius: 20px;
            backdrop-filter: blur(20px) saturate(140%);
            -webkit-backdrop-filter: blur(20px) saturate(140%);
            box-shadow: 0 18px 42px rgba(8, 18, 40, 0.22);
            padding: 60px 50px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
        }
        
        .stats__item {
            text-align: center;
        }
        
        .stats__number {
            font-size: 52px;
            font-weight: 800;
            color: var(--brand-bright);
            display: block;
            margin-bottom: 8px;
            line-height: 1.1;
        }
        
        .stats__suffix {
            font-size: 28px;
            font-weight: 700;
        }
        
        .stats__label {
            font-size: 15px;
            color: #2a3a5e;
            font-weight: 600;
        }
        
        /* ========================================
           4. 核心服务 (Services) — 已并入 products 区块；保留类名以防他处引用
           ======================================== */
        .services {
            background: transparent;
            padding: var(--space-section-pc) 40px;
        }

        .services__header {
            text-align: center;
            margin-bottom: 60px;
        }

        .services__title {
            font-size: 48px;
            font-weight: 700;
            /* 暗背景上显示：白字 */
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .services__subtitle {
            font-size: 18px;
            color: rgba(255,255,255,0.78);
        }
        
        .services__grid {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card-pc);
        }
        
        .service-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: var(--pad-card);
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }
        
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }
        
        .service-card__icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, rgba(0,59,115,0.08), rgba(0,165,255,0.08));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
        }
        
        .service-card__title {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-black);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        
        .service-card__desc {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-medium);
        }

        .service-card__price {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            color: #854F0B;
            background: #FAEEDA;
            border-radius: 999px;
        }

        .service-card__more {
            display: inline-block;
            margin-top: 14px;
            padding: 0;
            border: none;
            background: none;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-blue, #185FA5);
            cursor: pointer;
        }

        /* 服务详情面板 */
        .service-detail {
            margin-top: 40px;
            padding: 40px;
            background: var(--bg-white);
            border: 1px solid var(--border-light, #E6E8EB);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }
        .service-detail[hidden] { display: none; }

        .sd-head {
            display: flex;
            align-items: center;
            gap: 18px;
            position: relative;
            margin-bottom: 20px;
        }
        .sd-head__icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(0,59,115,0.08), rgba(0,165,255,0.08));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-blue, #185FA5);
            flex-shrink: 0;
        }
        .sd-head__title {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-black);
            margin: 0 0 4px;
        }
        .sd-head__price {
            font-size: 14px;
            font-weight: 600;
            color: #854F0B;
        }
        .sd-close {
            position: absolute;
            top: -10px;
            right: -10px;
            width: 32px;
            height: 32px;
            border: none;
            border-radius: 50%;
            background: #F1EFE8;
            color: #5F5E5A;
            font-size: 20px;
            line-height: 1;
            cursor: pointer;
        }
        .sd-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-medium);
            margin: 0 0 24px;
        }
        .sd-subtitle {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-black);
            margin: 0 0 14px;
        }
        .sd-process {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            margin-bottom: 24px;
        }
        .sd-step {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
        }
        .sd-step__num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-blue, #185FA5);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sd-step__label {
            font-size: 13px;
            color: var(--text-medium);
        }
        .sd-step__arrow {
            color: #B4B2A9;
            font-size: 16px;
        }
        .sd-features {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .sd-chip {
            padding: 6px 14px;
            font-size: 13px;
            color: #27500A;
            background: #EAF3DE;
            border-radius: 999px;
        }

        /* 常见问题 FAQ */
        .services-faq {
            padding: var(--space-section-pc) 40px;
            background: transparent;
        }
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-light, #E6E8EB);
            border-radius: 12px;
            background: var(--bg-white);
            margin-bottom: 16px;
            padding: 18px 22px;
        }
        .faq-item__q {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-black);
            margin: 0 0 10px;
        }
        .faq-item__q::before {
            content: "问";
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--brand-bright);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-top: 1px;
        }
        .faq-item__a {
            margin: 0;
            padding-left: 34px;
        }
        .faq-item__a p {
            margin: 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-medium);
        }

        @media (max-width: 768px) {
            .service-detail { padding: 24px; }
            .sd-process { gap: 6px; }
            .sd-step__label { font-size: 12px; }
        }
        
        /* ========================================
           5. 关于我们 (About)
           ======================================== */
        .about {
            padding: var(--space-section-pc) 40px;
            background: transparent;
        }
        
        .about__inner {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }
        
        .about__content {
            padding-right: 40px;
        }
        
        .about__label {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-bright);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
        }
        
        .about__title {
            font-size: 48px;
            font-weight: 700;
            /* 暗背景上显示：白字 */
            color: #fff;
            line-height: 1.2;
            margin-bottom: 24px;
        }

        .about__desc {
            font-size: 16px;
            line-height: 1.8;
            /* 暗背景上显示：浅灰文 */
            color: rgba(255,255,255,0.78);
            margin-bottom: 32px;
        }
        
        .about__advantages {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .about__advantage {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }
        
        .about__advantage-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--brand-deep), var(--brand-bright));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }
        
        .about__advantage-text h4 {
            font-size: 16px;
            font-weight: 600;
            /* 暗背景上：白字 */
            color: #fff;
            margin-bottom: 4px;
        }

        .about__advantage-text p {
            font-size: 14px;
            color: rgba(255,255,255,0.72);
            line-height: 1.5;
        }
        
        /* About 右侧图片区域 */
        .about__image {
            position: relative;
            height: 500px;
            border-radius: 20px;
            overflow: hidden;
            background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand-bright) 100%);
        }
        
        .about__image-placeholder {
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            gap: 16px;
        }
        
        .about__image-placeholder-icon {
            font-size: 80px;
            opacity: 0.6;
        }
        
        .about__image-placeholder-text {
            font-size: 14px;
            opacity: 0.7;
        }
        
        /* CTA 横幅已删除（原"需要专业的IT服务？"模块）：用户已并入留资弹层（FAQ + 表单）二合一 */
        /* ========================================
           7. Footer
           ======================================== */
        .footer {
            background: linear-gradient(135deg, #000000 0%, var(--brand-deep) 100%);
            color: rgba(255,255,255,0.8);
            padding: 80px 40px 40px;
            position: relative;
            border-top: 1px solid rgba(255,255,255,0.10);
        }

        .footer__grid {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 60px;
            padding-bottom: 40px;
            /* 中部横线已去除（原 border-bottom 1px） */
        }
        
        .footer__col-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .footer__col-text {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
        }
        
        .footer__logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
            text-decoration: none;
        }
        
        .footer__logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-deep), var(--brand-bright));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
        }
        
        .footer__links {
            list-style: none;
        }
        
        .footer__links li {
            margin-bottom: 12px;
        }
        
        .footer__links a {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
            transition: color 0.2s ease;
            text-decoration: none;
        }
        
        .footer__links a:hover {
            color: var(--brand-bright);
        }
        
        .footer__contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 14px;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
        }
        
        .footer__contact-icon {
            flex-shrink: 0;
            margin-top: 2px;
        }
        
        .footer__bottom {
            max-width: 1280px;
            margin: 30px auto 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 10px;
        }

        /* 页脚底部一行：版权 / ICP与计数器 水平平齐 */
        .footer__bottom-right {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
        }

        .footer__bottom-links {
            display: flex;
            gap: 20px;
        }
        
        .footer__bottom-links a {
            color: rgba(255,255,255,0.5);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        .footer__bottom-links a:hover {
            color: var(--brand-bright);
        }
        
        /* 页脚访客计数器：与 ICP 备案号水平平齐，同色低对比 */
        .site-counter {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255,255,255,0.5);
            font-size: 13px;
            letter-spacing: .02em;
            background: transparent;
            white-space: nowrap;
        }

        /* ========================================
           响应式设计 - 1024px (平板横屏)
           ======================================== */
        @media (max-width: 1024px) {
            .services__grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .about__inner {
                gap: 60px;
            }
            
            .about__content {
                padding-right: 0;
            }
        }
        
        /* ========================================
           响应式设计 - 768px (平板竖屏)
           ======================================== */
        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            
            /* 导航栏移动端 */
            .navbar__inner {
                padding: 14px 20px;
            }
            
            .navbar__links {
                display: none;
                position: fixed;
                top: 73px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px 20px;
                box-shadow: 0 10px 30px rgba(0,0,0,0.1);
                gap: 0;
            }
            
            .navbar__links.open {
                display: flex;
            }
            
            .navbar__links li {
                width: 100%;
            }
            
            .navbar__link {
                display: block;
                padding: 12px 0;
                color: var(--text-dark) !important;
                border-bottom: 1px solid var(--border-gray);
            }
            
            .navbar__cta {
                display: block;
                text-align: center;
                margin-top: 12px;
                border-radius: var(--radius-button);
            }
            
            .navbar__toggle {
                display: flex;
            }
            
            /* Hero 移动端 */
            .hero {
                padding: 120px 20px 60px;
                min-height: auto;
            }
            .hero__inner {
                /* 单栏居中继承桌面端，无需 column 切换 */
                padding: 0 8px;
            }
            .hero__content {
                max-width: 100%;
            }
            /* 移动端：太阳缩小、略上挪避免被 navbar 遮挡；星点降速省电但仍快于原值 */
            .page-cosmos__sun {
                width: min(104px, 16vmin);
                height: min(104px, 16vmin);
                top: 42%;
            }

            .hero__title {
                font-size: 40px;
            }

            .hero__subtitle {
                font-size: 18px;
            }

            .hero__buttons {
                flex-direction: column;
                align-items: center;
            }

            .hero__btn--primary,
            .hero__btn--secondary {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }

            /* 数据统计条移动端 */
            .stats {
                padding: 0 20px;
                margin-top: -60px;
            }

            .stats__inner {
                grid-template-columns: repeat(2, 1fr);
                padding: 40px 24px;
                gap: 30px;
            }

            .stats__number {
                font-size: 36px;
            }

            .stats__suffix {
                font-size: 20px;
            }

            /* 区块标题移动端 */
            .section {
                padding: var(--space-section-mobile) 0;
            }

            .services {
                padding: var(--space-section-mobile) 20px;
            }

            .services__title {
                font-size: 32px;
            }

            .services__grid {
                grid-template-columns: 1fr;
                gap: var(--gap-card-mobile);
            }

            /* 关于我们移动端 */
            .about {
                padding: var(--space-section-mobile) 20px;
            }

            .about__inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .about__title {
                font-size: 32px;
            }

            .about__image {
                height: 300px;
            }

            /* cta-banner 已删除 */

            /* Footer 移动端 */
            .footer {
                padding: 60px 20px 30px;
            }
            
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            
            .footer__bottom {
                flex-direction: column;
                text-align: center;
                gap: 15px;
            }
        }
        
        /* ========================================
           响应式设计 - 480px (手机)
           ======================================== */
        @media (max-width: 480px) {
            .hero__title {
                font-size: 32px;
            }
            
            .hero__subtitle {
                font-size: 16px;
            }
            
            .stats__inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                padding: 32px 16px;
            }
            
            .stats__number {
                font-size: 28px;
            }
            
            .stats__suffix {
                font-size: 16px;
            }
            
            .stats__label {
                font-size: 13px;
            }
            
            .services__title {
                font-size: 28px;
            }
            
            .about__title {
                font-size: 28px;
            }

            /* cta-banner 移动端样式已删除（该区块整块移除） */

            .footer__grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===================== 工具 / 商品 / 故障DIY / IT资讯 栏目（已去除灰底） =====================
           body 全屏 page-cosmos 提供深空蓝底色，各 section 透明，卡片用毛玻璃悬浮 */
        .tools, .products, .diy, .itnews, .news {
            max-width: 1200px;
            margin: 0 auto;
            padding: 72px 24px;
        }
        .tools__cat { margin: 28px 0 14px; }
        .products, .tools, .news {
            padding: var(--space-section-pc) 40px;
            background: transparent;
        }
        .products { background: transparent; }
        .tools { background: transparent; }
        .news { background: transparent; }
        .tools__grid, .products__grid, .diy__grid, .itnews__grid, .news__grid {
            display: grid; gap: 22px;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }
        .products__grid, .tools__grid, .news__grid {
            max-width: 1280px; margin: 0 auto;
        }
        /* ====================== 毛玻璃卡片悬浮 ======================
           工具 / 商品 / 故障DIY / IT资讯 / 外部工具 卡片统一改成玻璃态：
           半透明白底 + 背景模糊 + 柔光边框 + 微阴影，营造"悬浮于深空蓝背景之上"感 */
        .tool-card, .product-card, .diy-card, .news-card {
            background: rgba(255,255,255,0.82);
            border: 1px solid rgba(255,255,255,0.6);
            border-radius: 18px;
            padding: 24px;
            display: flex; flex-direction: column; gap: 10px;
            backdrop-filter: blur(20px) saturate(140%);
            -webkit-backdrop-filter: blur(20px) saturate(140%);
            box-shadow: 0 8px 32px rgba(8, 18, 40, 0.18), 0 1px 0 rgba(255,255,255,0.5) inset;
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
        }
        .tool-card:hover, .product-card:hover, .diy-card:hover, .news-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 42px rgba(8, 18, 40, 0.28), 0 1px 0 rgba(255,255,255,0.6) inset;
            border-color: rgba(255,255,255,0.7);
            background: rgba(255,255,255,0.94);
        }
        .tool-card__icon, .product-card__cover, .diy-card__cover {
            width: 56px; height: 56px; border-radius: 14px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(0,59,115,.08), rgba(0,165,255,.10));
            color: #1664ff; margin-bottom: 4px;
        }
        .product-card__cover { width: 100%; height: 140px; border-radius: 12px; overflow: hidden; position: relative; }
        .product-card__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
        .tool-card__title, .product-card__title, .diy-card__title, .news-card__title {
            font-size: 18px; font-weight: 700; color: #0a2540; margin: 0;
        }
        .tool-card__desc, .product-card__desc, .diy-card__summary, .news-card__summary {
            font-size: 14px; color: #1f2a44; line-height: 1.6; margin: 0;
        }
        .tool-card__tag, .product-card__tag, .diy-card__level {
            align-self: flex-start; font-size: 12px; font-weight: 600;
            color: #1664ff; background: rgba(22,100,255,.08);
            padding: 3px 10px; border-radius: 999px;
        }
        .product-card__tag {
            position: absolute; top: 16px; right: 16px;
            color: #fff; background: #1664ff;
        }
        .product-card { position: relative; }
        .product-card__price {
            font-size: 18px; font-weight: 800; color: #e5484d;
        }
        .product-card__specs { display: flex; flex-wrap: wrap; gap: 6px; }
        .product-card__spec {
            font-size: 12px; color: #2a3a4a; background: #f1f5fa;
            padding: 3px 9px; border-radius: 6px;
        }
        .product-card__actions { display: flex; gap: 10px; margin-top: auto; padding-top: 8px; }
        .btn-wechat, .btn-lead, .btn-detail, .diy-card__toggle, .tw-btn {
            border: none; border-radius: 10px; font-size: 14px; font-weight: 600;
            padding: 10px 16px; cursor: pointer; transition: .2s; font-family: inherit;
        }
        .btn-wechat { background: #2bbf7a; color: #fff; flex: 1; }
        .btn-wechat:hover { background: #229e66; }
        .btn-lead { background: #1664ff; color: #fff; flex: 1; }
        .btn-lead:hover { background: #0f4fd0; }
        .btn-detail { background: #fff; color: #1664ff; border: 1px solid #1664ff; flex: 1;
            text-align: center; text-decoration: none; display: flex; align-items: center; justify-content: center; }
        .btn-detail:hover { background: #eef4ff; }

        /* 实用工具：标题 + 引导图 同一行 */
        /* 实用工具卡片：缩短高度为圆角长方形（无"打开"按钮）；与外部工具卡片等高 */
        .tool-card--compact {
            flex-direction: row; align-items: center; gap: 12px;
            padding: 12px 18px; border-radius: 14px; cursor: pointer; min-height: 96px;
        }
        .tool-card--compact .tool-card__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
        .tool-card--compact .tool-card__icon { width: 36px; height: 36px; border-radius: 10px; margin-bottom: 0; flex: 0 0 auto; }
        .tool-card--compact .tool-card__icon svg { width: 18px; height: 18px; }
        .tool-card--compact .tool-card__title { font-size: 15px; }
        .tool-card--compact .tool-card__desc { font-size: 12px; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

        /* 外部工具：占满一整列（与实用工具卡片同宽同高），4 个按钮 2×2 横向居中 */
        .tool-ext-cluster {
            display: flex; flex-wrap: wrap; justify-content: center; align-content: center;
            gap: 10px; padding: 14px; min-height: 96px; width: 100%;
            /* 毛玻璃 */
            background: rgba(255,255,255,0.42);
            border: 1px solid rgba(255,255,255,0.42);
            border-radius: 14px;
            backdrop-filter: blur(20px) saturate(140%);
            -webkit-backdrop-filter: blur(20px) saturate(140%);
            box-shadow: 0 8px 32px rgba(8, 18, 40, 0.18);
            transition: transform .2s, box-shadow .2s, border-color .2s, background .2s;
        }
        .tool-ext-cluster:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 42px rgba(8, 18, 40, 0.28);
            border-color: rgba(255,255,255,0.6);
            background: rgba(255,255,255,0.55);
        }
        .tool-ext-btn {
            display: flex; align-items: center; justify-content: center; gap: 6px;
            width: 120px; height: 44px; border-radius: 10px; padding: 0 8px;
            background: linear-gradient(135deg, #f3f8ff, #e6f1ff);
            color: #1664ff; text-decoration: none;
            border: 1px solid #dce9ff; transition: .2s;
        }
        .tool-ext-btn:hover { background: #dce9ff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(22,100,255,.18); }
        .tool-ext-btn__icon { display: flex; flex: 0 0 auto; }
        .tool-ext-btn__icon svg { width: 18px; height: 18px; }
        .tool-ext-btn__name { font-size: 12px; font-weight: 600; line-height: 1.1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        /* 电脑故障DIY 步骤展开 */
        .diy-card__steps { margin-top: 6px; padding-top: 12px; border-top: 1px solid #eef2f7; }
        .diy-card__tools { font-size: 13px; color: #5a6b7b; margin-bottom: 8px; }
        .diy-card__tool { display: inline-block; font-size: 12px; color: #2a3a4a; background: #f1f5fa; padding: 2px 8px; border-radius: 6px; margin: 0 4px 4px 0; }
        .diy-card__list { margin: 0; padding-left: 20px; color: #2a3a4a; line-height: 1.7; font-size: 14px; }
        .diy-card__list li { margin-bottom: 6px; }
        /* IT资讯聚合 */
        .news-card { text-decoration: none; color: inherit; cursor: pointer; height: 100%; }
        .news-card__top { display: flex; align-items: center; gap: 10px; font-size: 12px; color: #9aa7b4; }
        .news-card__source { color: #1664ff; font-weight: 600; }
        .news-card__more { align-self: flex-start; color: #1664ff; font-weight: 600; font-size: 14px; margin-top: auto; }
        .itnews__note { text-align: center; font-size: 13px; color: #9aa7b4; margin-top: 18px; }

        /* 资讯卡片：与 .news-card--diy 统一 padding，避免两类卡片内边距不同导致整行错位 */
        .news-card--compact { padding: 24px; }
        .news-card--compact .news-card__top,
        .news-card--compact .news-card__more { display: none; }
        .news-card--compact .news-card__title { font-size: 15px; line-height: 1.35; margin: 0 0 6px; }
        .news-card--compact .news-card__summary {
            font-size: 13px; line-height: 1.6; margin: 0;
            display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
            overflow: hidden;
        }
        /* AI 摘要徽标 + 来源作者行 */
        .news-card__ai-badge {
            display: inline-block;
            font-size: 11px; line-height: 1; font-weight: 600;
            color: #7a4bff; background: #f1ecff;
            border: 1px solid #d9ccff; border-radius: 999px;
            padding: 4px 9px; margin: 2px 0 8px;
        }
        .news-card__meta {
            font-size: 12px; color: #9aa7b4; margin-top: 8px;
            display: flex; flex-wrap: wrap; gap: 6px;
        }
        /* 卡片底部行：margin-top:auto 把来源/日期压到卡片最底，使同排卡片视觉底缘对齐 */
        .news-card__foot {
            margin-top: auto; padding-top: 10px;
            border-top: 1px solid rgba(10, 37, 64, .08);
            display: flex; justify-content: space-between; align-items: center; gap: 8px;
            font-size: 12px; color: #9aa7b4;
        }
        .news-card__foot .news-card__src { color: #1664ff; font-weight: 600; }
        .news-card__foot .news-card__date { color: #9aa7b4; }

        /* 工具面板 */
        .tool-panel {
            max-width: 720px; margin: 24px auto 0; background: #fff;
            border: 1px solid #e6ecf2; border-radius: 16px; padding: 22px 24px;
            box-shadow: 0 8px 28px rgba(10,37,64,.10);
        }
        .tool-panel__head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
        .tool-panel__icon {
            width: 44px; height: 44px; border-radius: 12px; color: #1664ff;
            background: linear-gradient(135deg, rgba(0,59,115,.08), rgba(0,165,255,.10));
            display: flex; align-items: center; justify-content: center;
        }
        .tool-panel__title { font-size: 18px; color: #0a2540; margin: 0; flex: 1; }
        .tool-panel__close {
            border: none; background: #f1f5fa; color: #5a6b7b; font-size: 22px;
            width: 34px; height: 34px; border-radius: 9px; cursor: pointer; line-height: 1;
        }
        .tool-panel__close:hover { background: #e2e9f1; }
        /* 工具悬浮窗（复用留资弹层遮罩，避免内联注入导致页面抖动） */
        .tool-modal {
            position: fixed; inset: 0; background: rgba(10,37,64,.5);
            display: flex; align-items: center; justify-content: center; z-index: 999;
            padding: 20px;
        }
        .tool-modal[hidden] { display: none; }
        .tool-modal__box {
            background: #fff; border-radius: 18px; padding: 28px; width: 100%;
            max-width: 460px; position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.25);
            max-height: 86vh; overflow-y: auto;
        }
        .tool-panel__body { margin-top: 4px; }
        .tw { display: flex; flex-direction: column; gap: 10px; }
        .tw-input, .tw-label, .lead-form__row input, .lead-form__row textarea {
            width: 100%; padding: 11px 13px; border: 1px solid #d6dee7; border-radius: 10px;
            font-size: 15px; font-family: inherit; box-sizing: border-box;
        }
        .tw-label { border: none; padding: 0; color: #2a3a4a; font-weight: 600; font-size: 14px; }
        .tw-btn {
            align-self: flex-start; background: #1664ff; color: #fff;
        }
        .tw-btn:hover { background: #0f4fd0; }
        .tw-out { font-size: 15px; color: #0a2540; line-height: 1.7; }
        .tw-tip { font-size: 13px; color: #9aa7b4; margin: 0; }
        .pw-bar { height: 8px; border-radius: 999px; background: #eef2f7; overflow: hidden; }
        .pw-bar span { display: block; height: 100%; width: 0; transition: width .25s, background .25s; }
        .pw-label { font-size: 14px; color: #2a3a4a; min-height: 20px; font-weight: 600; }
        .ext-list { display: flex; flex-direction: column; gap: 8px; }
        .ext-item {
            display: flex; align-items: center; gap: 10px; text-decoration: none;
            padding: 12px 14px; border: 1px solid #e6ecf2; border-radius: 10px;
            color: #0a2540; transition: .2s;
        }
        .ext-item:hover { border-color: #1664ff; background: #f5f9ff; }
        .ext-item__name { font-weight: 600; }
        .ext-item__desc { font-size: 13px; color: #5a6b7b; flex: 1; }
        .ext-item__arrow { color: #1664ff; }
        .sym-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
        .sym-item { display: flex; align-items: center; gap: 8px; font-size: 14px; color: #2a3a4a; cursor: pointer; }
        .sym-row { padding: 10px 0; border-top: 1px solid #eef2f7; }
        .sym-send { color: #e5484d; font-weight: 600; margin: 6px 0 0; }

        /* 留资弹层：两栏布局（左侧表单 / 右侧常见问题），宽 ~880px，移动端堆叠 */
        .lead-modal {
            position: fixed; inset: 0; background: rgba(10,37,64,.55);
            display: flex; align-items: center; justify-content: center; z-index: 999;
            padding: 20px;
        }
        .lead-modal[hidden] { display: none; }
        .lead-modal__box {
            background: #fff; border-radius: 18px; padding: 0;
            width: 100%; max-width: 880px;
            position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.35);
            display: flex; flex-direction: column;
            max-height: 90vh;
            overflow: hidden;             /* 子两栏自己滚动 */
        }
        .lead-modal__close {
            position: absolute; top: 14px; right: 14px; border: none; background: #f1f5fa;
            color: #5a6b7b; font-size: 22px; width: 34px; height: 34px; border-radius: 9px; cursor: pointer;
            z-index: 2;
        }
        .lead-modal__title { font-size: 20px; color: #0a2540; margin: 0 0 4px; }
        .lead-modal__sub { font-size: 14px; color: #5a6b7b; margin: 0 0 18px; }

        /* 弹层 body：左右两栏（移动端堆叠） */
        .lead-modal__body {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            min-height: 0;
        }
        .lead-modal__col {
            padding: 30px 32px 28px;
            overflow-y: auto;
            min-height: 0;
        }
        .lead-modal__col--form {
            border-right: 1px solid #eef2f7;
        }
        .lead-modal__col--faq {
            background: #f7faff;     /* 极淡蓝灰，让 FAQ 区与表单区分 */
            border-top-right-radius: 18px;
            border-bottom-right-radius: 18px;
        }
        .lead-modal__faq-title {
            font-size: 17px;
            font-weight: 700;
            color: #0a2540;
            margin: 0 0 14px;
            display: flex; align-items: center; gap: 8px;
        }
        .lead-modal__faq-title::before {
            content: '';
            display: inline-block;
            width: 4px; height: 18px;
            background: var(--brand-orange, #FF6B35);
            border-radius: 2px;
        }
        .lead-form { display: flex; flex-direction: column; gap: 14px; }
        .lead-form__row { display: flex; flex-direction: column; gap: 6px; }
        .lead-form__row label { font-size: 13px; font-weight: 600; color: #2a3a4a; }
        .lead-form__row textarea { min-height: 72px; resize: vertical; }
        .lead-form__submit { background: #1664ff; color: #fff; border: none; padding: 13px; border-radius: 10px; font-size: 15px; font-weight: 700; cursor: pointer; }
        .lead-form__submit:hover { background: #0f4fd0; }
        .lead-form__submit:disabled { opacity: .6; cursor: not-allowed; }
        .lead-form__hint { font-size: 13px; min-height: 18px; }
        .lead-form__hint.ok { color: #2bbf7a; }
        .lead-form__hint.err { color: #e5484d; }

        /* 弹层 FAQ 条目：精简样式 */
        .lead-modal__faq-list { display: flex; flex-direction: column; gap: 10px; }
        .lead-faq-item {
            background: #fff;
            border: 1px solid #e6ecf2;
            border-radius: 10px;
            overflow: hidden;
        }
        .lead-faq-item__q {
            width: 100%;
            display: flex; align-items: center; justify-content: space-between;
            padding: 12px 14px;
            border: none; background: none;
            font-size: 14px; font-weight: 600; color: #0a2540;
            text-align: left; cursor: pointer;
        }
        .lead-faq-item__chevron {
            flex: 0 0 auto;
            color: #1664ff;
            font-size: 13px;
            transition: transform 0.25s ease;
        }
        .lead-faq-item.open .lead-faq-item__chevron { transform: rotate(180deg); }
        .lead-faq-item__a {
            max-height: 0; overflow: hidden;
            transition: max-height 0.25s ease;
        }
        .lead-faq-item.open .lead-faq-item__a { max-height: 320px; }
        .lead-faq-item__a-inner {
            padding: 0 14px 14px;
            font-size: 13px; line-height: 1.7;
            color: #3a4a5a;
        }
        .lead-modal__faq-more {
            margin-top: 14px;
            text-align: center;
            font-size: 13px;
            color: #1664ff;
        }
        .lead-modal__faq-more a {
            color: #1664ff;
            text-decoration: none;
            font-weight: 600;
        }
        .lead-modal__faq-more a:hover { text-decoration: underline; }

        /* Toast */
        .site-toast {
            position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%) translateY(20px);
            background: #0a2540; color: #fff; padding: 12px 20px; border-radius: 10px;
            font-size: 14px; opacity: 0; transition: .3s; z-index: 1000; max-width: 90vw;
        }
        .site-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

        @media (max-width: 768px) {
            .tools, .products, .diy, .itnews, .news { padding: 52px 16px; }
            .sym-grid { grid-template-columns: 1fr; }
            .product-card__actions { flex-direction: column; }
            /* 留资弹层移动端：左右两栏堆叠为上下两栏 */
            .lead-modal__body { grid-template-columns: 1fr; }
            .lead-modal__col--form { border-right: none; border-bottom: 1px solid #eef2f7; }
            .lead-modal__col--faq { border-top-right-radius: 0; border-bottom-left-radius: 18px; border-bottom-right-radius: 18px; }
            .lead-modal { padding: 12px; }
        }

        /* 合并后新增：商品/资讯过滤按钮、关于我们联系块、AI 卡片 */
        .products__filters, .news__filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 8px 0 22px; }
        .products__filter, .news__filter { border: 1px solid #d6dee7; background: #fff; color: #2a3a4a; padding: 8px 18px; border-radius: 999px; font-size: 14px; cursor: pointer; transition: .2s; }
        .products__filter:hover, .news__filter:hover { border-color: #1664ff; color: #1664ff; }
        .products__filter.is-active, .news__filter.is-active { background: #1664ff; border-color: #1664ff; color: #fff; }

        /* 客户端分页控件 */
        .pagination { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 26px; }
        .pagination__btn {
            min-width: 38px; height: 38px; padding: 0 10px;
            border: 1px solid #d6dee7; background: #fff; color: #2a3a4a;
            border-radius: 10px; font-size: 14px; font-weight: 600; cursor: pointer;
            transition: .2s; display: inline-flex; align-items: center; justify-content: center;
        }
        .pagination__btn:hover:not(:disabled) { border-color: #1664ff; color: #1664ff; }
        .pagination__btn.is-active { background: #1664ff; border-color: #1664ff; color: #fff; }
        .pagination__btn:disabled { opacity: .4; cursor: not-allowed; }
        .pagination__ellipsis { color: #9aa7b4; padding: 0 6px; align-self: center; font-size: 14px; }
        .product-card__toggle { margin-top: 10px; background: #eef4ff; border: none; color: #1664ff; font-weight: 600; padding: 8px 14px; border-radius: 10px; cursor: pointer; font-size: 13px; }
        .product-card__toggle:hover { background: #dce9ff; }
        .product-card__detail { margin-top: 12px; padding-top: 12px; border-top: 1px solid #eef2f7; text-align: left; }
        .pc-detail__sub { font-size: 14px; color: #0a2540; margin: 10px 0 6px; }
        .pc-detail__list { margin: 0; padding-left: 20px; line-height: 1.7; font-size: 14px; color: #2a3a4a; }
        .pc-detail__list li { margin-bottom: 4px; }
        .pc-detail__chips { display: flex; flex-wrap: wrap; gap: 6px; }
        .pc-detail__desc { font-size: 14px; color: #2a3a4a; line-height: 1.6; margin: 0; }
        .news-card--diy { cursor: default; }

        /* 工具分类标题在 grid 中占满整行，防止错位 */
        .tools__cat { margin: 28px 0 14px; grid-column: 1 / -1; }
        .tools__cat:first-child { margin-top: 0; }

        /* 区块过渡：商品、FAQ 顶部圆角浮层已移除（深空蓝基底全统一，无需浅色伪元素桥接） */
    

/* =========================================================
   静态列表页专属样式（由 build-static-pages.js 生成页面使用）
   ========================================================= */
.page-hero { background: linear-gradient(135deg, #003B73 0%, #00A5FF 100%); color: #fff; padding: 48px 0 40px; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,.7); margin-bottom: 16px; }
.breadcrumb a { color: rgba(255,255,255,.85); }
.breadcrumb a:hover { text-decoration: underline; }
.page-title { font-size: 34px; font-weight: 800; margin-bottom: 10px; }
.page-sub { font-size: 16px; color: rgba(255,255,255,.85); margin-bottom: 0; }
.page-subtitle { font-size: 24px; font-weight: 700; margin: 48px 0 20px; color: #003B73; }

/* 服务详情页 */
.services-grid { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }
.service-detail { display: flex; flex-direction: column; }
.service-long { font-size: 14px; color: #2a3a4a; line-height: 1.7; margin: 8px 0; }
.service-meta { display: flex; flex-direction: column; gap: 8px; margin: 8px 0; }
.service-price { font-weight: 700; color: #FF6B35; font-size: 15px; }
.service-features { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.service-features li { background: #eef4ff; color: #1664ff; font-size: 12px; padding: 4px 10px; border-radius: 20px; }
.service-process { padding-left: 20px; line-height: 1.9; font-size: 14px; color: #2a3a4a; margin: 8px 0; }
.btn-lead { margin-top: auto; background: var(--brand-bright); color: #fff; border: none; padding: 10px 18px; border-radius: 10px; font-weight: 600; cursor: pointer; font-size: 14px; }
.btn-lead:hover { background: #0090e0; }

/* 资讯中心分类 Tab */
.news-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 28px; }
.news-tab { background: #fff; border: 1px solid #e5e7eb; color: #333; padding: 8px 18px; border-radius: 20px; cursor: pointer; font-size: 14px; font-weight: 500; }
.news-tab.active { background: var(--brand-bright); color: #fff; border-color: var(--brand-bright); }
.news-tab:hover { border-color: var(--brand-bright); }

/* 页脚：列表页直接复用首页 .footer / .footer__grid 体系（见上文 1127 起的 footer 区块），
   不再在此重复定义；footer 由 scripts/build-static-pages.js 的 footerHTML() 组件统一注入。 */


/* 区块"查看全部"入口链接 */
.section__more { display: inline-block; margin-top: 16px; color: var(--brand-bright); font-weight: 600; font-size: 15px; text-decoration: none; }
.section__more:hover { text-decoration: underline; }