/* ========== 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-display: swap;
        }
        body {
            color: var(--text-main);
            background: #ffffff;
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* ========== 导航栏（与首页完全一致） ========== */
        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; }

        /* FAQ 头部 */
        .faq-hero {
            padding: 160px 8% 60px;
            background: radial-gradient(circle at 50% 0%, rgba(239, 68, 68, 0.05) 0%, rgba(255, 255, 255, 1) 70%);
            text-align: center;
        }
        .faq-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #1f2937, #ef443b);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 16px;
        }
        .faq-hero h1 span {
            background: linear-gradient(135deg, #ef443b, #EE8D3B);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .faq-hero p {
            font-size: 1.2rem;
            max-width: 780px;
            margin: 0 auto;
            color: #4b5563;
        }

        /* FAQ 容器 */
        .faq-container {
            max-width: 960px;
            margin: 0 auto 80px;
            padding: 0 4%;
        }
        .faq-group {
            margin-bottom: 48px;
        }
        .faq-group-title {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary-red);
            margin-bottom: 24px;
            padding-left: 12px;
            border-left: 5px solid var(--primary-red);
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid #e9eef3;
            border-radius: 20px;
            margin-bottom: 18px;
            overflow: hidden;
            transition: all 0.2s;
        }
        .faq-item:hover {
            border-color: #ffcccb;
            box-shadow: 0 8px 20px rgba(239, 68, 68, 0.05);
        }
        .faq-checkbox {
            display: none;
        }
        .faq-trigger {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 22px 28px;
            cursor: pointer;
            user-select: none;
        }
        .faq-trigger h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #1f2937;
            padding-right: 20px;
        }
        .faq-icon {
            width: 18px;
            height: 18px;
            position: relative;
            flex-shrink: 0;
            transition: transform 0.25s;
        }
        .faq-icon::before, .faq-icon::after {
            content: '';
            position: absolute;
            background-color: #9ca3af;
            transition: background 0.2s;
        }
        .faq-icon::before { top: 8px; left: 0; width: 18px; height: 2px; }
        .faq-icon::after { top: 0; left: 8px; width: 2px; height: 18px; }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            background: #fefcfc;
            border-top: 1px solid transparent;
        }
        .faq-answer-content {
            padding: 0 28px 28px;
        }
        .faq-answer-content p {
            font-size: 0.98rem;
            color: #4b5563;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .faq-answer-content strong {
            color: #000;
            font-weight: 700;
        }
        .faq-checkbox:checked ~ .faq-answer {
            max-height: 800px;
            border-top-color: #f0f2f5;
        }
        .faq-checkbox:checked ~ .faq-trigger .faq-icon {
            transform: rotate(45deg);
        }
        .faq-checkbox:checked ~ .faq-trigger .faq-icon::before,
        .faq-checkbox:checked ~ .faq-trigger .faq-icon::after {
            background-color: var(--primary-red);
        }
        .faq-checkbox:checked ~ .faq-trigger h3 {
            color: var(--primary-red);
        }

        /* 创意版块：版本兼容性对照表 + 自检工具 */
        .compatibility-tool {
            max-width: 960px;
            margin: 0 auto 60px;
            background: #fef7f6;
            border-radius: 32px;
            padding: 40px 32px;
            border: 1px solid #ffe0de;
        }
        .comp-header {
            text-align: center;
            margin-bottom: 32px;
        }
        .comp-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #1f2937;
        }
        .comp-header h2 span {
            color: var(--primary-red);
        }
        .version-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        }
        .version-table th, .version-table td {
            padding: 14px 16px;
            text-align: left;
            border-bottom: 1px solid #f0e2e0;
        }
        .version-table th {
            background: #fef1ef;
            font-weight: 700;
            color: #b91c1c;
        }
        .check-badge {
            background: #e6f7e6;
            color: #2e7d32;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-block;
        }
        .warn-badge {
            background: #fff0db;
            color: #b45f06;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
        }

        .cta-diagnostic {
            margin-top: 32px;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .btn-diagnostic {
            background: var(--primary-red);
            color: white;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 700;
            transition: 0.2s;
        }
        .btn-diagnostic-outline {
            background: transparent;
            border: 2px solid var(--primary-red);
            color: var(--primary-red);
        }

        /* 页脚完全一致 */
        footer {
            background: #111111;
            color: #ffffff;
            padding: 80px 8% 40px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-logo-section img { height: 35px; margin-bottom: 20px; }
        .footer-logo-section p { color: #999; font-size: 14px; }
        .footer-column h3 {
            color: var(--primary-red); font-size: 1.2rem; font-weight: 700; margin-bottom: 25px;
            position: relative; padding-bottom: 15px;
        }
        .footer-column h3::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 1px; background: #333;
        }
        .footer-column ul { list-style: none; }
        .footer-column ul li { margin-bottom: 12px; }
        .footer-column ul li a { color: #cccccc; text-decoration: none; font-size: 14px; transition: 0.3s; }
        .footer-column ul li a:hover { color: var(--primary-red); }
        .footer-bottom {
            margin-top: 60px; padding-top: 30px; border-top: 1px solid #222;
            display: flex; justify-content: space-between; flex-wrap: wrap; font-size: 12px; color: #666;
        }
        .footer-socials { display: flex; gap: 20px; }
        .footer-socials a { color: #666; text-decoration: none; }
        .footer-socials a:hover { color: #fff; }

        @media (max-width: 1024px) {
            .footer-container { grid-template-columns: 1fr 1fr; }
            .footer-logo-section { grid-column: span 2; text-align: center; margin-bottom: 40px; }
        }
        @media (max-width: 768px) {
            .faq-hero h1 { font-size: 2.1rem; }
            .faq-trigger { padding: 18px; }
            .faq-answer-content { padding: 0 20px 20px; }
            .compatibility-tool { padding: 24px; }
        }