/* ========== 全局重置与变量 ========== */
        :root {
            --primary-red: #ef443b;
            --text-main: #1f2937;
            --gradient-start: #ef443b;
            --gradient-end: #EE8D3B;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Noto Sans', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-style: normal;
            font-weight: 400;
            font-display: swap;
        }
        body {
            color: var(--text-main);
            background: #ffffff;
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* ========== 导航栏 ========== */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 8%;
            height: 80px;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            background: radial-gradient(circle at 10% 20%, rgba(239, 68, 68, 0.03) 0%, rgba(255, 255, 255, 1) 50%);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #f3f4f6;
        }
        .nav-left {
            display: flex;
            align-items: center;
        }
        .logo {
            margin-right: 40px;
        }
        .logo img {
            height: 30px;
            width: 158px;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 15px;
            border-bottom: 3px solid transparent;
        }
        .nav-links li:hover {
            border-bottom: 3px solid #FFD5D6;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
        }
        .nav-links-svg {
            width: 12px;
            height: 12px;
        }
        .nav-right {
            display: flex;
            align-items: center;
        }
        .btn-link {
            text-decoration: none;
            color: var(--primary-red);
            padding: 10px 24px;
            border: 2px solid var(--primary-red);
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            margin-left: 12px;
            transition: 0.3s;
        }
        .btn-link:hover {
            background: var(--primary-red);
            color: #fff;
        }
        .btn-outline {
            text-decoration: none;
            color: #fff;
            background: var(--primary-red);
            padding: 11px 24px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            transition: 0.3s;
        }
        .btn-outline:hover {
            background: #d93833;
        }

        /* ========== 英雄区 ========== */
        .hero {
            padding: 180px 8% 100px;
            display: flex;
            background: radial-gradient(circle at 10% 20%, rgba(239, 68, 68, 0.03) 0%, rgba(255, 255, 255, 1) 50%);
            min-height: 85vh;
            align-items: center;
        }
        .hero-text {
            flex: 1;
            padding-right: 40px;
        }
        .hero-text h1 {
            font-size: 4.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #ef443b, #EE8D3B);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .hero-badge {
            background: rgba(239,68,59,0.1);
            display: inline-block;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary-red);
            margin-bottom: 20px;
        }
        .hero-text p {
            font-size: 1.3rem;
            line-height: 1.5;
            color: #2d3e50;
            font-weight: 500;
            margin-bottom: 30px;
            max-width: 580px;
        }
        .hero-list {
            display: flex;
            gap: 28px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .hero-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            list-style: none;
            font-weight: 500;
        }
        .hero-list img {
            width: 20px;
            height: 20px;
        }
        .cta-group {
            display: flex;
            gap: 16px;
        }
        .btn-hero-main {
            background: var(--primary-red);
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 700;
            box-shadow: 0 10px 20px rgba(239,68,68,0.2);
        }
        .btn-hero-sec {
            border: 2px solid var(--primary-red);
            color: var(--primary-red);
            padding: 12px 32px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 700;
        }
        .hero-figure {
            flex: 1;
            text-align: center;
        }
        .hero-figure img {
            width: 100%;
            max-width: 380px;
            border-radius: 28px;
            box-shadow: 0 30px 40px rgba(0,0,0,0.08);
        }

        /* ========== 网页版核心优势卡片 ========== */
        .web-native-section {
            padding: 80px 8%;
            background: #fef9f9;
        }
        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 60px;
        }
        .section-header h2 {
            font-size: 2.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #ef443b, #EE8D3B);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .section-header p {
            font-size: 1.2rem;
            color: #4b5563;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 35px;
        }
        .feature-card-web {
            background: white;
            padding: 32px 24px;
            border-radius: 32px;
            transition: all 0.3s;
            box-shadow: 0 12px 30px rgba(0,0,0,0.03);
            border: 1px solid #fff0f0;
        }
        .feature-card-web:hover {
            transform: translateY(-8px);
            border-color: #ef443b20;
            box-shadow: 0 25px 40px rgba(239,68,59,0.08);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            background: #ffe8e6;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }
        .feature-icon img {
            width: 32px;
            height: 32px;
        }
        .feature-card-web h3 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #1f2937;
        }
        .feature-card-web p {
            color: #5f6c80;
            line-height: 1.6;
        }
        .weaknet-extra {
            margin-top: 50px;
            background: linear-gradient(120deg, #ef443b08, #fff);
            border-radius: 48px;
            padding: 30px 40px;
            text-align: center;
            border-left: 6px solid var(--primary-red);
        }
        .weaknet-extra h4 {
            font-size: 1.6rem;
            color: #ef443b;
            margin-bottom: 12px;
        }

        /* ========== 轻量访问展示区 (替代原feature-split) ========== */
        .global-access {
            padding: 100px 8%;
            display: flex;
            align-items: center;
            gap: 60px;
            flex-wrap: wrap;
        }
        .global-text {
            flex: 1;
        }
        .global-text h2 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .global-text h2 span {
            color: var(--primary-red);
        }
        .global-text p {
            font-size: 1.1rem;
            line-height: 1.7;
            margin-bottom: 24px;
            color: #374151;
        }
        .tech-badge {
            display: inline-flex;
            background: #f3f4f6;
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 600;
            margin-top: 12px;
        }
        .global-img {
            flex: 1;
            text-align: center;
        }
        .global-img img {
            width: 100%;
            max-width: 480px;
            border-radius: 28px;
        }

        /* ========== 信任区 ========== */
        .trust-section {
            padding: 60px 8%;
            text-align: center;
            background: #fff;
        }
        .trust-section h2 {
            font-size: 2.4rem;
            font-weight: 500;
        }
        .logo-wall {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 40px;
        }
        .logo-wall img {
            height: 50px;
            opacity: 0.7;
            transition: 0.3s;
        }

        /* ========== 场景解决方案卡片 (原需求区改造) ========== */
        .solutions-section {
            padding: 80px 8%;
            background: #f9fafb;
        }
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            margin-top: 20px;
        }
        .solution-card {
            background: white;
            border-radius: 32px;
            padding: 40px 28px;
            text-align: center;
            transition: all 0.3s;
        }
        .solution-card:hover {
            transform: scale(1.02);
            box-shadow: 0 25px 40px rgba(0,0,0,0.05);
        }
        .solution-icon {
            background: #ef443b10;
            width: 80px;
            height: 80px;
            border-radius: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 28px;
        }
        .solution-card h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .solution-card p {
            color: #5a6a85;
            line-height: 1.6;
        }

        /* ========== 定价版块保持创意 ========== */
        .pricing-section {
            padding: 80px 8%;
            text-align: center;
        }
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin: 50px 0;
        }
        .pricing-card {
            background: #fff;
            border-radius: 28px;
            padding: 32px 20px;
            border: 1px solid #f0f0f0;
            transition: 0.3s;
        }
        .pricing-card-recommend {
            border: 2px solid var(--primary-red);
            position: relative;
        }
        .pricing-ribbon {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--primary-red);
            color: white;
            padding: 4px 18px;
            border-radius: 40px;
            font-weight: 700;
        }
        .pricing-price {
            font-size: 3rem;
            font-weight: 800;
            margin: 20px 0;
        }
        .pricing-features {
            list-style: none;
            text-align: left;
            margin: 25px 0;
        }
        .pricing-features li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-pricing {
            display: inline-block;
            background: var(--primary-red);
            color: white;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
        }
        .btn-pricing-outline {
            border: 2px solid var(--primary-red);
            color: var(--primary-red);
            background: transparent;
        }

        footer {
            background: #111111;
            color: #ffffff;
            padding: 60px 8% 30px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-bottom {
            border-top: 1px solid #333;
            margin-top: 50px;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        @media (max-width: 1000px) {
            .hero { flex-direction: column; text-align: center; }
            .hero-text { padding-right: 0; }
            .hero-list { justify-content: center; }
            .cta-group { justify-content: center; }
            .solutions-grid, .pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin-left: auto; margin-right: auto; }
            .footer-container { grid-template-columns: 1fr 1fr; }
        }