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

        body {
            font-family: 'Inter', sans-serif;
            background: #0b0f1a;
            color: #e5e9f0;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 容器与布局 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部导航 (融入关键词) */
        .header {
            background: rgba(10, 15, 28, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #1e263a;
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

        .logo a {
            font-size: 1.9rem;
            font-weight: 700;
            background: linear-gradient(135deg, #a78bfa, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
            text-decoration: none;
        }

        .logo span {
            font-size: 1rem;
            background: none;
            -webkit-text-fill-color: #7f8caf;
            margin-left: 8px;
            font-weight: 400;
        }

        .nav-links {
            display: flex;
            gap: 40px;
            font-weight: 500;
        }

        .nav-links a {
            text-decoration: none;
            color: #b9c2db;
            transition: 0.2s;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a i {
            font-size: 1rem;
            color: #5f7ef2;
        }

        .nav-links a:hover {
            color: white;
        }

        .btn-download {
            background: #1f2a48;
            color: white !important;
            padding: 10px 22px;
            border-radius: 40px;
            font-weight: 600;
            border: 1px solid #354477;
            transition: 0.2s;
        }

        .btn-download:hover {
            background: #2f3d66;
            border-color: #5f7ef2;
        }

        /* HERO 主视觉 (重点突出“CF辅助”) */
        .hero {
            padding: 70px 0 90px;
            background: radial-gradient(circle at 80% 20%, #19213a, #0b0f1a 70%);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 40px;
        }

        .hero h1 {
            font-size: 3.3rem;
            font-weight: 700;
            line-height: 1.2;
            background: linear-gradient(to right, #ffffff, #c0d0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero h1 i {
            -webkit-text-fill-color: #3b82f6;
            background: none;
            font-style: normal;
            font-size: 3rem;
        }

        .hero .subhead {
            font-size: 1.2rem;
            color: #a6b3dc;
            margin: 24px 0 28px;
            max-width: 90%;
            border-left: 4px solid #3b82f6;
            padding-left: 20px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-bottom: 40px;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: #b3c7ff;
        }

        .stat-label {
            font-size: 0.9rem;
            color: #7b89b1;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .cta-group {
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .cta-primary {
            background: #3b82f6;
            border: none;
            padding: 16px 38px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.15rem;
            color: white;
            cursor: pointer;
            transition: 0.2s;
            box-shadow: 0 10px 25px -5px #1e3b73;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .cta-primary:hover {
            background: #2563eb;
            transform: scale(1.02);
        }

        .cta-secondary {
            background: transparent;
            border: 1px solid #3f5185;
            padding: 15px 32px;
            border-radius: 50px;
            font-weight: 600;
            color: #cfdbff;
            text-decoration: none;
            transition: 0.2s;
        }

        .cta-secondary:hover {
            border-color: #5f7ef2;
            color: white;
        }

        .hero-image {
            background: rgba(23, 33, 58, 0.7);
            border-radius: 24px;
            padding: 28px 22px;
            backdrop-filter: blur(8px);
            border: 1px solid #2b365a;
            box-shadow: 0 30px 40px -20px black;
            text-align: center;
        }

        .hero-image i {
            font-size: 6rem;
            color: #3b82f6;
            margin-bottom: 15px;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            margin: 25px 0 15px;
        }

        .feature-tags span {
            background: #1a2340;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            border: 1px solid #2f3e6b;
            color: #bfd0ff;
        }

        .hero-image p {
            color: #9dabda;
            font-size: 1.1rem;
            margin: 15px 0 5px;
        }

        /* 合作伙伴/信任标识 (SEO文本密度优化) */
        .trust-bar {
            background: #0f1422;
            padding: 18px 0;
            border-top: 1px solid #1d2540;
            border-bottom: 1px solid #1d2540;
        }

        .trust-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            color: #6f7da0;
            font-weight: 500;
        }

        .trust-bar span i {
            color: #3b82f6;
            margin-right: 8px;
        }

        /* 核心功能 (关键词: CF辅助,透视,自瞄,防封) */
        .features {
            padding: 80px 0;
            background: #0c101c;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .section-title span {
            color: #3b82f6;
        }

        .section-sub {
            text-align: center;
            color: #8f9fc8;
            max-width: 700px;
            margin: 0 auto 60px;
            font-size: 1.15rem;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: #131b30;
            border-radius: 28px;
            padding: 32px 22px;
            border: 1px solid #253153;
            transition: 0.3s;
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            border-color: #3b82f6;
            box-shadow: 0 20px 30px -15px #070b16;
        }

        .feature-icon {
            font-size: 2.7rem;
            color: #3b82f6;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.6rem;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .feature-card p {
            color: #a3b3da;
            font-size: 0.95rem;
        }

        /* 如何使用 + 百度优化长词描述 */
        .howto {
            padding: 70px 0;
            background: #0f1625;
        }

        .howto-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .howto-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 24px;
        }

        .howto-title i {
            color: #3b82f6;
            font-style: normal;
        }

        .howto-list {
            list-style: none;
        }

        .howto-list li {
            margin-bottom: 20px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .howto-list li i {
            background: #1f2b4a;
            padding: 12px;
            border-radius: 50%;
            color: #3b82f6;
            font-size: 1.3rem;
            width: 48px;
            text-align: center;
        }

        .howto-list li strong {
            font-size: 1.2rem;
            color: white;
        }

        .howto-list li p {
            color: #9cabcf;
        }

        .code-snippet {
            background: #0b1020;
            border-radius: 28px;
            padding: 30px;
            border: 1px solid #253758;
            font-family: 'Fira Code', monospace;
        }

        .code-snippet pre {
            color: #b7c7ff;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* FAQ 与 关键词布局 */
        .faq {
            padding: 70px 0;
            background: #0c101c;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px 40px;
            margin-top: 40px;
        }

        .faq-item {
            border-bottom: 1px solid #1f2a44;
            padding-bottom: 24px;
        }

        .faq-question {
            font-size: 1.25rem;
            font-weight: 600;
            display: flex;
            gap: 15px;
            margin-bottom: 10px;
        }

        .faq-question i {
            color: #3b82f6;
        }

        .faq-answer {
            color: #9dabda;
            margin-left: 36px;
        }

        /* 底部 */
        .footer {
            border-top: 1px solid #1a2442;
            padding: 40px 0;
            background: #080c18;
            color: #7280aa;
        }

        .footer .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .footer a {
            color: #9eafda;
            text-decoration: none;
        }

        .footer a:hover {
            color: white;
        }

        .keywords-footer {
            max-width: 500px;
            font-size: 0.85rem;
            color: #4e5c84;
        }

        /* 移动端调整 */
        @media (max-width: 1000px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero-grid,
            .howto-inner {
                grid-template-columns: 1fr;
            }

            .nav-links {
                display: none;
            }
        }

        @media (max-width: 600px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }

            .faq-grid {
                grid-template-columns: 1fr;
            }
        }