/* ============================================================
           Hero 顶部横幅 - 简约大气版
           ============================================================ */
        .adv-hero {
            position: relative;
            background: #ffffff;
            border: 1px solid #eef2f6;
            border-radius: 20px;
            padding: 36px 40px;
            margin-bottom: 20px;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
            text-align: center;
        }
        .adv-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #4a6cf7, #7c3aed, #a855f7);
            opacity: 0.85;
        }
        .adv-hero::after {
            content: '';
            position: absolute;
            right: -120px;
            bottom: -120px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(74, 108, 247, 0.05), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .adv-hero-inner {
            position: relative;
            z-index: 2;
        }
        .adv-hero-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            color: #4a6cf7;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 16px;
            border: 1px solid #d0d9f0;
        }
        .adv-hero h1 {
            font-size: 30px;
            font-weight: 700;
            color: #1a202c;
            margin: 0 0 10px;
            letter-spacing: 0.3px;
        }
        .adv-hero p {
            font-size: 15px;
            color: #718096;
            margin: 0 auto;
            line-height: 1.7;
            max-width: 640px;
        }
        .adv-hero-tags {
            display: flex;
            gap: 8px;
            margin-top: 18px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .adv-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: #f8fafc;
            color: #4a5568;
            padding: 5px 14px;
            border-radius: 30px;
            font-size: 12.5px;
            border: 1px solid #eef2f6;
            transition: all 0.2s;
        }
        .adv-hero-tag i {
            color: #4a6cf7;
            font-size: 13px;
        }
        .adv-hero-tag:hover {
            border-color: #4a6cf7;
            color: #4a6cf7;
            background: #f0f5ff;
        }

        /* ============================================================
           通用卡片
           ============================================================ */
        .adv-card {
            background: #ffffff;
            border-radius: 16px;
            border: 1px solid #eef2f6;
            padding: 24px 28px;
            margin-bottom: 20px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
        }
        .adv-card-title {
            font-size: 18px;
            font-weight: 600;
            color: #1a202c;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 14px;
            border-bottom: 2px solid #f0f2f5;
        }
        .adv-card-title i {
            color: #4a6cf7;
            background: rgba(74, 108, 247, 0.1);
            padding: 7px 9px;
            border-radius: 9px;
            font-size: 18px;
        }

        /* ============================================================
           价格卡片网格
           ============================================================ */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        @media (max-width: 768px) {
            .price-grid { grid-template-columns: 1fr; gap: 14px; }
        }

        .price-card {
            position: relative;
            background: #ffffff;
            border: 1.5px solid #eef2f6;
            border-radius: 16px;
            padding: 26px 24px 24px;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            overflow: hidden;
        }
        .price-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, #4a6cf7, #7c3aed);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .price-card:hover {
            border-color: #d0d9f0;
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(74, 108, 247, 0.10);
        }
        .price-card:hover::before {
            opacity: 1;
        }

        .price-card-head {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 16px;
        }
        .price-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .price-icon.blue {
            background: rgba(74, 108, 247, 0.1);
            color: #4a6cf7;
        }
        .price-icon.purple {
            background: rgba(124, 58, 237, 0.1);
            color: #7c3aed;
        }
        .price-icon.green {
            background: rgba(56, 161, 105, 0.1);
            color: #38a169;
        }
        .price-icon.orange {
            background: rgba(237, 137, 54, 0.1);
            color: #ed8936;
        }
        .price-title {
            flex: 1;
            min-width: 0;
        }
        .price-title h3 {
            font-size: 17px;
            font-weight: 700;
            color: #1a202c;
            margin: 0 0 4px;
            line-height: 1.3;
        }
        .price-title .subtitle {
            font-size: 12.5px;
            color: #a0aec0;
            line-height: 1.5;
        }

        .price-number {
            display: flex;
            align-items: baseline;
            gap: 6px;
            margin: 14px 0 16px;
            padding: 14px 0;
            border-top: 1px dashed #eef2f6;
            border-bottom: 1px dashed #eef2f6;
        }
        .price-number .symbol {
            font-size: 18px;
            font-weight: 600;
            color: #4a6cf7;
        }
        .price-number .amount {
            font-size: 38px;
            font-weight: 800;
            color: #4a6cf7;
            line-height: 1;
            letter-spacing: -1.5px;
        }
        .price-number .unit {
            font-size: 13px;
            color: #718096;
            margin-left: 4px;
        }
        .price-number .badge-permanent {
            margin-left: auto;
            background: linear-gradient(135deg, #fff3e0, #ffe0b3);
            color: #d97706;
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .price-features {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .price-features li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 13.5px;
            color: #4a5568;
            line-height: 1.6;
        }
        .price-features li i {
            color: #38a169;
            font-size: 16px;
            flex-shrink: 0;
            margin-top: 1px;
        }

        /* ============================================================
           推荐卡片（高亮）
           ============================================================ */
        .price-card.hot {
            border-color: #d0d9f0;
            background: linear-gradient(145deg, #fafbff, #ffffff);
        }
        .price-card.hot::before {
            opacity: 1;
        }
        .price-card.hot::after {
            content: ' 推荐';
            position: absolute;
            top: 12px;
            right: -32px;
            background: linear-gradient(135deg, #f89250, #f1404b);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 3px 38px;
            transform: rotate(35deg);
            letter-spacing: 0.5px;
            box-shadow: 0 2px 8px rgba(241, 64, 75, 0.3);
        }

        /* ============================================================
           服务保障
           ============================================================ */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }
        @media (max-width: 900px) {
            .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 480px) {
            .guarantee-grid { grid-template-columns: 1fr; }
        }
        .guarantee-item {
            text-align: center;
            padding: 20px 14px;
            background: #f8fafc;
            border-radius: 12px;
            border: 1px solid #eef2f6;
            transition: all 0.25s;
        }
        .guarantee-item:hover {
            border-color: #4a6cf7;
            background: #f0f5ff;
            transform: translateY(-2px);
        }
        .guarantee-item i {
            font-size: 28px;
            color: #4a6cf7;
            display: block;
            margin-bottom: 8px;
        }
        .guarantee-item strong {
            display: block;
            font-size: 14px;
            color: #1a202c;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .guarantee-item span {
            display: block;
            font-size: 12px;
            color: #718096;
            line-height: 1.5;
        }

        /* ============================================================
           流程步骤
           ============================================================ */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }
        @media (max-width: 768px) {
            .flow-steps { grid-template-columns: 1fr 1fr; gap: 12px; }
        }
        .flow-step {
            text-align: center;
            padding: 20px 14px;
            background: linear-gradient(145deg, #fafbfc, #ffffff);
            border-radius: 14px;
            border: 1px solid #eef2f6;
            position: relative;
            transition: all 0.25s;
        }
        .flow-step:hover {
            border-color: #4a6cf7;
            box-shadow: 0 6px 20px rgba(74, 108, 247, 0.06);
        }
        .flow-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, #4a6cf7, #7c3aed);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
            box-shadow: 0 4px 12px rgba(74, 108, 247, 0.25);
        }
        .flow-step strong {
            display: block;
            font-size: 14px;
            color: #1a202c;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .flow-step span {
            display: block;
            font-size: 12.5px;
            color: #718096;
            line-height: 1.5;
        }

        /* ============================================================
           联系区
           ============================================================ */
        .contact-hero {
            background: linear-gradient(135deg, #f0f5ff, #e8edfc);
            border-radius: 16px;
            padding: 28px 32px;
            border-left: 4px solid #4a6cf7;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .contact-hero-left h3 {
            font-size: 18px;
            font-weight: 700;
            color: #1a202c;
            margin: 0 0 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .contact-hero-left h3 i {
            color: #4a6cf7;
        }
        .contact-hero-left p {
            font-size: 13.5px;
            color: #4a5568;
            margin: 0;
            line-height: 1.6;
        }
        .contact-hero-right {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .contact-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 11px 24px;
            border-radius: 10px;
            text-decoration: none;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .contact-btn-primary {
            background: #4a6cf7;
            color: #fff;
            box-shadow: 0 2px 8px rgba(74, 108, 247, 0.2);
        }
        .contact-btn-primary:hover {
            background: #3a5cd9;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(74, 108, 247, 0.3);
            color: #fff;
        }
        .contact-btn-outline {
            background: #ffffff;
            color: #4a5568;
            border: 1px solid #e2e8f0;
        }
        .contact-btn-outline:hover {
            border-color: #4a6cf7;
            color: #4a6cf7;
            transform: translateY(-2px);
        }

        /* ============================================================
           常见问题
           ============================================================ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            padding: 16px 20px;
            background: #f8fafc;
            border-radius: 12px;
            border: 1px solid #eef2f6;
            transition: all 0.2s;
        }
        .faq-item:hover {
            border-color: #d0d9f0;
            background: #f0f5ff;
        }
        .faq-item .q {
            font-size: 14px;
            font-weight: 600;
            color: #1a202c;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .faq-item .q i {
            color: #4a6cf7;
            font-size: 15px;
        }
        .faq-item .a {
            font-size: 13.5px;
            color: #4a5568;
            line-height: 1.7;
            padding-left: 21px;
        }

        /* ============================================================
           深色模式
           ============================================================ */
        body.dark-mode .adv-hero {
            background: #16213e;
            border-color: #2a3a5a;
        }
        body.dark-mode .adv-hero h1 {
            color: #e2e8f0;
        }
        body.dark-mode .adv-hero p {
            color: #a0aec0;
        }
        body.dark-mode .adv-hero-icon {
            background: linear-gradient(135deg, #1e2a4a, #2a3a5a);
            border-color: #3a4a6a;
            color: #6a8cff;
        }
        body.dark-mode .adv-hero-tag {
            background: #1a2a4a;
            color: #a0aec0;
            border-color: #2a3a5a;
        }
        body.dark-mode .adv-hero-tag i {
            color: #6a8cff;
        }
        body.dark-mode .adv-hero-tag:hover {
            border-color: #4a6cf7;
            color: #6a8cff;
            background: #1e2a4a;
        }

        body.dark-mode .adv-card {
            background: #16213e;
            border-color: #2a3a5a;
        }
        body.dark-mode .adv-card-title {
            color: #e2e8f0;
            border-bottom-color: #2a3a5a;
        }

        body.dark-mode .price-card {
            background: #16213e;
            border-color: #2a3a5a;
        }
        body.dark-mode .price-card:hover {
            border-color: #4a6cf7;
            background: #1a2a4a;
        }
        body.dark-mode .price-card.hot {
            background: linear-gradient(145deg, #1a2a4a, #16213e);
            border-color: #3a4a6a;
        }
        body.dark-mode .price-title h3 {
            color: #e2e8f0;
        }
        body.dark-mode .price-title .subtitle {
            color: #a0aec0;
        }
        body.dark-mode .price-number {
            border-top-color: #2a3a5a;
            border-bottom-color: #2a3a5a;
        }
        body.dark-mode .price-number .amount,
        body.dark-mode .price-number .symbol {
            color: #6a8cff;
        }
        body.dark-mode .price-number .unit {
            color: #a0aec0;
        }
        body.dark-mode .price-number .badge-permanent {
            background: linear-gradient(135deg, #3a2a1a, #4a3a1a);
            color: #f6ad55;
        }
        body.dark-mode .price-features li {
            color: #cbd5e0;
        }

        body.dark-mode .guarantee-item {
            background: #1a2a4a;
            border-color: #2a3a5a;
        }
        body.dark-mode .guarantee-item:hover {
            border-color: #4a6cf7;
            background: #1e2a4a;
        }
        body.dark-mode .guarantee-item strong {
            color: #e2e8f0;
        }
        body.dark-mode .guarantee-item span {
            color: #a0aec0;
        }

        body.dark-mode .flow-step {
            background: linear-gradient(145deg, #1a2a4a, #16213e);
            border-color: #2a3a5a;
        }
        body.dark-mode .flow-step:hover {
            border-color: #4a6cf7;
        }
        body.dark-mode .flow-step strong {
            color: #e2e8f0;
        }
        body.dark-mode .flow-step span {
            color: #a0aec0;
        }

        body.dark-mode .contact-hero {
            background: linear-gradient(135deg, #1a2a4a, #1e2a4a);
            border-left-color: #6a8cff;
        }
        body.dark-mode .contact-hero-left h3 {
            color: #e2e8f0;
        }
        body.dark-mode .contact-hero-left p {
            color: #a0aec0;
        }
        body.dark-mode .contact-btn-outline {
            background: #1e2a4a;
            color: #a0aec0;
            border-color: #2a3a5a;
        }
        body.dark-mode .contact-btn-outline:hover {
            border-color: #4a6cf7;
            color: #6a8cff;
        }

        body.dark-mode .faq-item {
            background: #1a2a4a;
            border-color: #2a3a5a;
        }
        body.dark-mode .faq-item:hover {
            border-color: #4a6cf7;
            background: #1e2a4a;
        }
        body.dark-mode .faq-item .q {
            color: #e2e8f0;
        }
        body.dark-mode .faq-item .a {
            color: #a0aec0;
        }

        /* ============================================================
           手机端
           ============================================================ */
        @media (max-width: 768px) {
            .adv-hero {
                padding: 26px 20px;
                border-radius: 16px;
            }
            .adv-hero h1 { font-size: 22px; }
            .adv-hero p { font-size: 13.5px; }
            .adv-hero-icon {
                width: 54px;
                height: 54px;
                font-size: 24px;
            }
            .adv-hero-tag { font-size: 11px; padding: 4px 11px; }

            .adv-card {
                padding: 18px 16px;
                border-radius: 14px;
            }
            .adv-card-title {
                font-size: 16px;
                margin-bottom: 16px;
            }

            .price-card { padding: 20px 18px; }
            .price-number .amount { font-size: 32px; }
            .price-icon {
                width: 42px;
                height: 42px;
                font-size: 20px;
            }
            .price-title h3 { font-size: 15.5px; }

            .contact-hero {
                padding: 22px 20px;
                flex-direction: column;
                align-items: stretch;
            }
            .contact-hero-right {
                width: 100%;
            }
            .contact-btn {
                flex: 1;
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .adv-hero { padding: 22px 16px; }
            .adv-hero h1 { font-size: 20px; }
            .price-number .amount { font-size: 28px; }
            .price-number .badge-permanent {
                font-size: 10px;
                padding: 2px 8px;
            }
        }
        @media (max-width: 768px) {
    /* 手机端：隐藏整个 navbar 行 */
    .header-banner .dh-navbar {
        display: none !important;
    }
    /* 让 .header-banner 不再留底部空白 */
    .header-banner {
        padding-bottom: 0 !important;
    }
}