:root {
            --bg-body: #06060f;
            --bg-surface: #0d0d1f;
            --bg-card: #13132a;
            --bg-card-hover: #1a1a38;
            --bg-elevated: #0f0f24;
            --border-subtle: rgba(255, 255, 255, 0.05);
            --border-glow: rgba(100, 70, 255, 0.2);
            --border-accent: rgba(124, 77, 255, 0.25);
            --text-primary: #f0edff;
            --text-secondary: #b0acc8;
            --text-muted: #6a6688;
            --accent-1: #7c4dff;
            --accent-2: #b388ff;
            --accent-3: #18c8f0;
            --accent-4: #00e5a0;
            --accent-5: #ff6b6b;
            --gradient-main: linear-gradient(135deg, #7c4dff, #18c8f0);
            --gradient-warm: linear-gradient(135deg, #b388ff, #7c4dff);
            --gradient-cool: linear-gradient(135deg, #18c8f0, #00e5a0);
            --shadow-card: 0 12px 48px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 60px rgba(124, 77, 255, 0.08);
            --radius-xl: 28px;
            --radius-lg: 24px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1140px;
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-fast);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 12px 32px;
            border-radius: 60px;
            transition: var(--transition);
            box-shadow: 0 4px 24px rgba(124, 77, 255, 0.3);
            border: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 40px rgba(124, 77, 255, 0.45);
        }
        .btn-outline-sm {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--accent-2);
            padding: 6px 16px;
            border-radius: 30px;
            border: 1px solid rgba(179, 136, 255, 0.2);
            transition: var(--transition-fast);
            background: rgba(179, 136, 255, 0.04);
        }
        .btn-outline-sm:hover {
            background: rgba(179, 136, 255, 0.12);
            border-color: rgba(179, 136, 255, 0.4);
            color: #fff;
        }

        /* 导航栏 - 与首页完全一致 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(6, 6, 15, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition);
        }
        .navbar.scrolled {
            background: rgba(6, 6, 15, 0.94);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.55);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.2rem;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .nav-logo .logo-badge {
            width: 32px;
            height: 32px;
            background: var(--gradient-main);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: #fff;
            box-shadow: 0 0 14px rgba(124, 77, 255, 0.3);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-links a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            letter-spacing: 0.01em;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-2);
            border-radius: 1px;
            transition: width 0.3s ease;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: #b388ff;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--accent-2);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-cta .btn-primary {
            padding: 8px 22px;
            font-size: 0.85rem;
            box-shadow: 0 2px 16px rgba(124, 77, 255, 0.25);
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 6px;
            cursor: pointer;
            z-index: 1001;
        }
        .nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
            transform-origin: center;
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(4px, 4px);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(4px, -4px);
        }

        /* Hero - FAQ 专属 */
        .faq-hero {
            padding: 150px 0 55px;
            background: var(--bg-body);
            position: relative;
            text-align: center;
            overflow: hidden;
        }
        .faq-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(179, 136, 255, 0.04) 0%, rgba(24, 200, 240, 0.02) 40%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .faq-hero .container {
            position: relative;
            z-index: 1;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(179, 136, 255, 0.08);
            border: 1px solid rgba(179, 136, 255, 0.12);
            padding: 5px 20px;
            border-radius: 40px;
            font-size: 0.74rem;
            font-weight: 600;
            color: #b388ff;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 22px;
        }
        .faq-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            letter-spacing: -0.035em;
            line-height: 1.08;
            margin-bottom: 16px;
        }
        .faq-hero h1 .highlight {
            background: linear-gradient(135deg, #b388ff, #18c8f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .faq-hero p {
            font-size: 1.12rem;
            color: var(--text-secondary);
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.9;
        }
        .search-box {
            max-width: 480px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 60px;
            padding: 6px 6px 6px 20px;
            transition: var(--transition-fast);
        }
        .search-box:focus-within {
            border-color: rgba(124, 77, 255, 0.4);
            box-shadow: 0 0 30px rgba(124, 77, 255, 0.1);
        }
        .search-box input {
            flex: 1;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            font-family: var(--font);
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box .search-btn {
            background: var(--gradient-main);
            border-radius: 50%;
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            cursor: pointer;
            transition: var(--transition-fast);
            flex-shrink: 0;
        }
        .search-box .search-btn:hover {
            transform: scale(1.05);
        }

        /* 通用区块标签 */
        .section-label {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-label .badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 18px;
            border-radius: 30px;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 10px;
        }
        .section-label h2 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.025em;
            line-height: 1.25;
            margin-bottom: 6px;
        }
        .section-label p {
            color: var(--text-secondary);
            max-width: 520px;
            margin: 8px auto 0;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* 问题分类导航 - 创意版块 */
        .category-nav {
            padding: 30px 0 40px;
            background: var(--bg-body);
        }
        .category-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .category-chip {
            padding: 10px 22px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .category-chip:hover,
        .category-chip.active {
            background: rgba(124, 77, 255, 0.12);
            border-color: rgba(179, 136, 255, 0.4);
            color: #fff;
            box-shadow: 0 0 20px rgba(124, 77, 255, 0.12);
        }

        /* FAQ 列表 - 手风琴 */
        .faq-list-section {
            padding: 10px 0 60px;
            background: var(--bg-surface);
        }
        .faq-list-section .container {
            max-width: 800px;
        }
        .faq-group {
            margin-bottom: 32px;
        }
        .faq-group-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
        }
        .faq-group-title .group-icon {
            font-size: 1.4rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            transition: var(--transition-fast);
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(124, 77, 255, 0.15);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            color: var(--text-primary);
            font-size: 0.96rem;
            font-weight: 600;
            text-align: left;
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .faq-question .q-icon {
            font-size: 1.2rem;
            color: var(--accent-3);
            flex-shrink: 0;
        }
        .faq-question .arrow {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .arrow {
            transform: rotate(180deg);
            color: #b388ff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
            padding: 0 22px 18px 22px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }

        /* 热门问题快速入口 - 创意版块 */
        .hot-questions {
            padding: 60px 0 60px;
            background: var(--bg-body);
        }
        .hot-questions .section-label .badge {
            background: rgba(255, 107, 107, 0.07);
            color: #ff6b6b;
            border: 1px solid rgba(255, 107, 107, 0.07);
        }
        .hot-questions .section-label h2 {
            background: linear-gradient(135deg, #f0edff, #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        .hot-card {
            background: var(--bg-card);
            padding: 22px 18px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .hot-card:hover {
            border-color: rgba(255, 107, 107, 0.25);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }
        .hot-card .hot-icon {
            font-size: 2rem;
            display: block;
            margin-bottom: 8px;
        }
        .hot-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
        }
        .hot-card p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-top: 4px;
        }

        /* 联系支持 - 创意版块 */
        .support-cta {
            padding: 60px 0 65px;
            background: var(--bg-elevated);
        }
        .support-cta .section-label .badge {
            background: rgba(24, 200, 240, 0.07);
            color: #18c8f0;
            border: 1px solid rgba(24, 200, 240, 0.07);
        }
        .support-cta .section-label h2 {
            background: linear-gradient(135deg, #f0edff, #18c8f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .support-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
        }
        .support-card {
            background: var(--bg-card);
            padding: 24px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            text-align: center;
            transition: var(--transition);
            flex: 1 1 220px;
            max-width: 280px;
        }
        .support-card:hover {
            border-color: rgba(24, 200, 240, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .support-card .s-icon {
            font-size: 2.4rem;
            display: block;
            margin-bottom: 10px;
        }
        .support-card h4 {
            font-size: 1rem;
            font-weight: 700;
        }
        .support-card p {
            font-size: 0.84rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 6px 0 12px;
        }

        /* Footer - 统一 */
        .footer {
            background: #03030a;
            padding: 54px 0 30px;
            border-top: 1px solid var(--border-subtle);
        }
        .footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand .logo .badge {
            width: 28px;
            height: 28px;
            background: var(--gradient-main);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.86rem;
            color: rgba(255, 255, 255, 0.38);
            max-width: 300px;
            line-height: 1.8;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }
        .footer-col ul li {
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.38);
            transition: var(--transition-fast);
            cursor: pointer;
        }
        .footer-col ul li:hover {
            color: #fff;
        }
        .footer-col .contact {
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.38);
            margin-bottom: 5px;
            line-height: 1.6;
        }
        .footer-col .contact strong {
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.28);
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .footer-bottom .info-group {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .faq-hero h1 {
                font-size: 2.4rem;
            }
            .hot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .navbar .container {
                height: 60px;
            }
            .nav-links {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(6, 6, 15, 0.97);
                backdrop-filter: blur(24px);
                flex-direction: column;
                padding: 28px 20px;
                gap: 18px;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.85);
                transform: translateY(-130%);
                transition: var(--transition);
                border-bottom: 1px solid var(--border-subtle);
                align-items: stretch;
                text-align: center;
                z-index: 999;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                padding: 10px 0;
                font-size: 1rem;
                display: block;
            }
            .nav-cta .btn-primary {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .faq-hero {
                padding: 115px 0 35px;
            }
            .faq-hero h1 {
                font-size: 2rem;
            }
            .category-grid {
                gap: 8px;
            }
            .category-chip {
                padding: 8px 16px;
                font-size: 0.78rem;
            }
            .hot-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                margin: 0 auto;
            }
            .support-links {
                flex-direction: column;
                align-items: center;
            }
            .support-card {
                max-width: 100%;
            }
            .footer .container {
                grid-template-columns: 1fr;
                gap: 26px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .footer-bottom .info-group {
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .faq-hero h1 {
                font-size: 1.7rem;
            }
            .container {
                padding: 0 16px;
            }
            .faq-question {
                font-size: 0.88rem;
            }
        }