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

        body {
            font-family: 'Inter', sans-serif;
            background: #f2f5f9;
            color: #1a2634;
            line-height: 1.5;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* 整体采用两列非对称布局 (仅在大屏) */
        .app-wrapper {
            display: flex;
            flex: 1;
            max-width: 1440px;
            margin: 0 auto;
            width: 100%;
            padding: 20px 24px;
            gap: 30px;
        }

        /* 左侧固定信息面板 — 全新布局特征 */
        .sidebar {
            width: 300px;
            flex-shrink: 0;
            background: #ffffff;
            border-radius: 32px;
            padding: 32px 20px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
            border: 1px solid #e4e9f0;
            height: fit-content;
            position: sticky;
            top: 20px;
        }

        .sidebar-logo {
            font-size: 1.9rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 2px solid #eef2f7;
        }

        .sidebar-logo i {
            color: #1e4f8a;
            margin-right: 8px;
        }

        .quick-stats {
            margin-bottom: 32px;
        }

        .stat-row {
            display: flex;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px dashed #d7e0e9;
        }

        .stat-label {
            color: #526477;
        }

        .stat-value {
            font-weight: 700;
            color: #0e2b44;
        }

        .telegram-card {
            background: #eef3fc;
            border-radius: 24px;
            padding: 22px 18px;
            text-align: center;
            margin: 30px 0 20px;
            border: 1px solid #cddef0;
        }

        .telegram-card i {
            font-size: 2.5rem;
            color: #229ed9;
            margin-bottom: 10px;
        }

        .telegram-user {
            font-weight: 700;
            font-size: 1.2rem;
            background: white;
            padding: 8px 12px;
            border-radius: 60px;
            display: inline-block;
            margin: 12px 0;
            border: 1px solid #b8cee8;
        }

        .sidebar-footer {
            font-size: 0.8rem;
            color: #6b84a0;
            margin-top: 30px;
        }

        /* 右侧主内容区域 */
        .main-content {
            flex: 1;
            min-width: 0;
        }

        /* 导航移到主内容上方？ 但左侧已有logo，为了整体，导航可放在右侧顶部 */
        .top-nav {
            display: flex;
            justify-content: flex-end;
            gap: 32px;
            padding-bottom: 20px;
            margin-bottom: 10px;
            border-bottom: 1px solid #dae2ec;
        }

        .top-nav a {
            text-decoration: none;
            color: #3e5670;
            font-weight: 500;
        }

        .top-nav a:hover {
            color: #0d2f52;
        }

        /* HERO 区域全新样式：文字左对齐，右侧无图，用数据列表 */
        .hero-new {
            margin-bottom: 50px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #0f233a;
            margin-bottom: 16px;
        }

        .hero-highlight {
            background: #d9e6ff;
            color: #1e4f8a;
            padding: 0 8px;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: #3c5775;
            max-width: 600px;
            margin-bottom: 30px;
        }

        .feature-metrics {
            display: flex;
            gap: 40px;
            background: #ffffff;
            padding: 20px 28px;
            border-radius: 28px;
            border: 1px solid #dee7f0;
            width: fit-content;
        }

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

        .metric-number {
            font-size: 2rem;
            font-weight: 700;
        }

        /* 好处 — 采用横向滚动卡片组 (PC上用flex wrap) */
        .benefits-row {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 40px 0;
        }

        .benefit-block {
            background: white;
            border: 1px solid #e0e8f2;
            border-radius: 24px;
            padding: 24px 28px;
            flex: 1 1 180px;
            transition: all 0.15s;
            box-shadow: 0 4px 8px rgba(0,0,0,0.02);
        }

        .benefit-block i {
            font-size: 2rem;
            color: #1e4f8a;
            margin-bottom: 16px;
        }

        .benefit-block h4 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        /* 原理区块 — 左右交错但这次用边框分隔 */
        .principle-section {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 30px;
            background: #ffffffd6;
            border: 1px solid #dbe3ed;
            border-radius: 30px;
            padding: 32px;
            margin: 40px 0;
        }

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

        .principle-list li {
            display: flex;
            gap: 14px;
            margin-bottom: 20px;
        }

        .principle-list i {
            color: #1e4f8a;
            font-size: 1.3rem;
            margin-top: 3px;
        }

        .architecture-preview {
            background: #f0f5fd;
            border-radius: 24px;
            padding: 24px;
            text-align: center;
        }

        /* 套餐 — 采用横向对比卡片，不是三列等高，而是特色突出 */
        .pricing-horizontal {
            display: flex;
            gap: 20px;
            margin: 40px 0;
            flex-wrap: wrap;
        }

        .plan-card {
            background: white;
            border: 1px solid #dae3ef;
            border-radius: 28px;
            padding: 28px 24px;
            flex: 1 1 200px;
            transition: all 0.15s;
            position: relative;
        }

        .plan-card.featured {
            border: 2px solid #1e4f8a;
            background: #fbfdff;
            transform: scale(1.02);
        }

        .plan-badge {
            background: #1e4f8a;
            color: white;
            font-size: 0.7rem;
            padding: 4px 10px;
            border-radius: 30px;
            position: absolute;
            top: -12px;
            right: 20px;
        }

        .plan-links-count {
            font-size: 2.2rem;
            font-weight: 800;
            margin: 10px 0 5px;
        }

        .plan-price {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 16px 0 8px;
        }

        .btn-block {
            width: 100%;
            margin-top: 20px;
            background: #1e4f8a;
            color: white;
            border: none;
            padding: 14px;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            text-align: center;
            display: block;
            text-decoration: none;
        }

        /* FAQ 折叠 — 全新样式：用左右结构？保持可折叠 */
        .faq-wrapper {
            margin: 50px 0 30px;
        }

        .faq-title {
            font-size: 2rem;
            margin-bottom: 24px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-entry {
            background: white;
            border: 1px solid #dde5f0;
            border-radius: 20px;
        }

        .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            cursor: pointer;
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: #fafcff;
            border-top: 0 solid #d0dceb;
        }

        .faq-a-inner {
            padding: 0 24px 20px 24px;
            color: #345172;
        }

        .faq-entry.active .faq-a {
            max-height: 200px;
            border-top-width: 1px;
        }

        .faq-entry.active .faq-q i {
            transform: rotate(180deg);
        }

        /* 联系方式 (在FAQ之后) */
        .contact-block {
            background: #ffffff;
            border-radius: 32px;
            padding: 36px 36px;
            border: 1px solid #d1e0ef;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            margin: 20px 0 40px;
        }

        .contact-left i {
            font-size: 3.2rem;
            color: #229ed9;
        }

        .contact-center {
            font-size: 1.8rem;
            font-weight: 600;
            background: #ecf3fc;
            padding: 10px 28px;
            border-radius: 60px;
        }

        /* 友情链接底部 */
        .footer-new {
            margin-top: 40px;
            padding: 28px 0;
            border-top: 1px solid #cfdceb;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .friend-links-new a {
            margin-right: 24px;
            color: #3a5b7e;
            text-decoration: none;
        }

        /* 响应式：小屏变为单列 */
        @media (max-width: 900px) {
            .app-wrapper {
                flex-direction: column;
                padding: 16px;
            }
            .sidebar {
                width: 100%;
                position: static;
                margin-bottom: 24px;
            }
            .top-nav {
                justify-content: flex-start;
                flex-wrap: wrap;
            }
            .principle-section {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 600px) {
            .feature-metrics {
                flex-wrap: wrap;
                gap: 20px;
            }
            .contact-block {
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }
            .footer-new {
                flex-direction: column;
                gap: 20px;
            }
        }