* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
            color: #1f2937;
            background: #ffffff;
            line-height: 1.7;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            width: min(1280px, 92%);
            margin: 0 auto;
        }
        /* 头部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid #eef3fb;
            box-shadow: 0 2px 14px rgba(33, 120, 237, 0.06);
        }
        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: #2178ed;
            letter-spacing: 0.5px;
        }
        .nav-menu {
            display: flex;
            gap: 34px;
            list-style: none;
        }
        .nav-menu a {
            font-size: 15px;
            color: #374151;
            font-weight: 500;
            transition: color 0.2s;
        }
        .nav-menu a:hover {
            color: #2178ed;
        }
        .nav-action {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-input {
            width: 210px;
            height: 40px;
            border: 1px solid #d9e4f5;
            border-radius: 8px;
            padding: 0 14px;
            outline: none;
            font-size: 14px;
            background: #f7faff;
            transition: all 0.2s;
        }
        .search-input:focus {
            border-color: #2178ed;
            background: #fff;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 42px;
            padding: 0 22px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.25s;
        }
        .btn-primary {
            background: #2178ed;
            color: #fff;
        }
        .btn-primary:hover {
            background: #1667d4;
            box-shadow: 0 10px 24px rgba(33, 120, 237, 0.28);
            transform: translateY(-1px);
        }
        .btn-white {
            background: #fff;
            color: #2178ed;
            border: 1px solid #2178ed;
        }
        .btn-white:hover {
            background: #eef5ff;
        }
        /* Banner */
        .banner {
            position: relative;
            padding: 70px 0 60px;
            background:
                radial-gradient(circle at 12% 20%, rgba(255, 255, 255, 0.28), transparent 28%),
                radial-gradient(circle at 88% 10%, rgba(125, 185, 255, 0.35), transparent 32%),
                linear-gradient(135deg, #1f6fe0 0%, #024ff6 45%, #5aa0ff5c 100%);
            overflow: hidden;
        }
        .banner::before {
            content: "";
            position: absolute;
            left: -120px;
            top: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .banner::after {
            content: "";
            position: absolute;
            right: -160px;
            bottom: -180px;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: rgba(150, 200, 255, 0.18);
        }
        .banner-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 60px;
            align-items: center;
        }
                .badge-row {
            display: flex;
            gap: 10px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        /* 4个badge各自不同半透背景色 */
        .badge {
            padding: 6px 14px;
            border-radius: 999px;
            color: #fff;
            font-size: 13px;
            border: 1px solid rgba(255, 255, 255, 0.32);
            backdrop-filter: blur(6px);
        }
        .badge:nth-child(1) {
            background: rgba(255, 225, 120, 0.28);
        }
        .badge:nth-child(2) {
            background: rgba(120, 255, 210, 0.28);
        }
        .badge:nth-child(3) {
            background: rgba(200, 160, 255, 0.28);
        }
        .badge:nth-child(4) {
            background: rgba(255, 160, 180, 0.28);
        }
        .banner h1 {
            font-size: 52px;
            line-height: 1.18;
            color: #fff;
            font-weight: 800;
            margin-bottom: 22px;
            letter-spacing: -1px;
        }
        .banner h1 span {
            background: linear-gradient(90deg, #ffe27a, #fff7c7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .banner-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 34px;
            max-width: 560px;
        }
        .banner-actions {
            display: flex;
            gap: 16px;
            align-items: center;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        /* 两个按钮统一宽度，同高同宽 */
        .banner-actions .btn {
            width: 180px;
            height: 58px;
            font-size: 18px;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
        }
        .download-main {
            background: #fff;
            color: #2178ed;
        }
        .download-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 24px 48px rgba(0, 0, 0, 0.24);
        }
        .download-note {
            color: rgba(255, 255, 255, 0.86);
            font-size: 14px;
        }
        .banner-image {
            position: relative;
            z-index: 2;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.22);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: #fff;
        }
        /* 功能图标区 */
        .feature-icons {
            padding: 90px 0;
            background: #f7faff;
        }
        .section-eyebrow {
            text-align: center;
            color: #2178ed;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 2px;
            margin-bottom: 14px;
        }
        .section-title {
            text-align: center;
            font-size: 40px;
            font-weight: 800;
            color: #111827;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            font-size: 17px;
            color: #4b5563;
            margin-bottom: 64px;
        }
        .icon-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 30px;
        }
        .icon-card {
            background: #fff;
            border-radius: 16px;
            padding: 34px 20px;
            text-align: center;
            border: 1px solid #e6efff;
            transition: all 0.3s;
        }
        .icon-card:hover {
            transform: translateY(-8px);
            border-color: #2178ed;
            box-shadow: 0 20px 40px rgba(33, 120, 237, 0.14);
        }
        .icon-circle {
            width: 72px;
            height: 72px;
            border-radius: 22px;
            background: linear-gradient(135deg, #eaf3ff, #c9dcff);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 34px;
            color: #2178ed;
        }
        .icon-card h4 {
            font-size: 17px;
            margin-bottom: 8px;
            color: #111827;
        }
        .icon-card p {
            font-size: 14px;
            color: #6b7280;
        }
        /* 通用内容板块 */
        .content-section {
            padding: 100px 0;
        }
        .content-section.gray {
            background: #f7faff;
        }
        .content-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }
        .content-row.reverse .content-text {
            order: 2;
        }
        .content-row.reverse .content-media {
            order: 1;
        }
        .content-media {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(33, 120, 237, 0.12);
            border: 1px solid #e5efff;
            background: #fff;
        }
        .content-text h3 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 22px;
            color: #111827;
            line-height: 1.3;
        }
        .content-text p {
            font-size: 16px;
            color: #4b5563;
            margin-bottom: 20px;
        }
        .feature-list {
            list-style: none;
            margin-bottom: 32px;
        }
        .feature-list li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            color: #374151;
        }
        .feature-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #2178ed;
            color: #fff;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        /* 优势板块 */
        .advantages {
            padding: 100px 0;
            background:
                linear-gradient(180deg, #f7faff 0%, #eaf3ff 100%);
        }
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .advantage-card {
            background: #fff;
            border-radius: 20px;
            padding: 44px 34px;
            border: 1px solid #e6efff;
            transition: all 0.3s;
        }
        .advantage-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 24px 48px rgba(33, 120, 237, 0.14);
        }
        .advantage-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, #2178ed, #5aa0ff);
            color: #fff;
            font-size: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }
        .advantage-card h4 {
            font-size: 21px;
            margin-bottom: 14px;
            color: #111827;
        }
        .advantage-card p {
            font-size: 15px;
            color: #4b5563;
        }
        /* CTA */
        .cta-section {
            padding: 100px 0;
        }
        .cta-box {
            border-radius: 28px;
            padding: 80px 60px;
            background:
                radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.25), transparent 30%),
                linear-gradient(135deg, #1f6fe0 0%, #3c8cff 100%);
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-box h3 {
            font-size: 42px;
            margin-bottom: 18px;
            font-weight: 800;
        }
        .cta-box p {
            font-size: 18px;
            margin-bottom: 36px;
            color: rgba(255, 255, 255, 0.92);
        }
        /* 页脚 */
        footer {
            background: #0f2b5c;
            color: rgba(255, 255, 255, 0.72);
            padding: 70px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-about .logo {
            color: #fff;
            margin-bottom: 18px;
            display: inline-block;
        }
        .footer-about p {
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-column h5 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 22px;
        }
        .footer-column ul {
            list-style: none;
        }
        .footer-column li {
            margin-bottom: 12px;
            font-size: 14px;
        }
        .footer-column a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 30px;
            text-align: center;
            font-size: 13px;
        }
        /* 移动端适配 */
        @media (max-width: 1024px) {
            .icon-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .content-row,
            .content-row.reverse {
                grid-template-columns: 1fr;
                gap: 50px;
            }
            .content-row.reverse .content-text,
            .content-row.reverse .content-media {
                order: unset;
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-menu,
            .search-input {
                display: none;
            }
            .banner {
                padding: 50px 0 40px;
            }
            .banner-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .banner h1 {
                font-size: 36px;
            }
            .banner-desc {
                font-size: 16px;
            }
            .section-title {
                font-size: 30px;
            }
            .content-text h3 {
                font-size: 26px;
            }
            .icon-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
            .advantage-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 50px 30px;
            }
            .cta-box h3 {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            /* 移动端banner按钮自适应100% */
            .banner-actions {
                flex-wrap: wrap;
            }
            .banner-actions .btn {
                width: 100%;
            }
        }
        @media (max-width: 480px) {
            .icon-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .banner h1 {
                font-size: 30px;
            }
        }


/* ==================== 11. 悬浮客服 ==================== */
.float-customer-service {
    position: fixed;
    right: 22px;
    bottom: 22px;
    background: #ff0909;
    padding: 10px 16px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 3px 14px rgba(3, 183, 82, 0.4);
    cursor: pointer;
    z-index: 999;
    transition: var(--transition);
}
.float-customer-service a {
    color: #fff !important;
    text-decoration: none !important;
}
.float-customer-service:hover {
    opacity: 0.9;
    transform: scale(1.03);
}