/* roulang page: index */
:root {
            --bg-deep: #0a0e27;
            --bg-card: rgba(15, 25, 50, 0.6);
            --neon-cyan: #00f0ff;
            --electric-purple: #a855f7;
            --text-primary: #e8eaed;
            --text-secondary: #a0a8c0;
            --text-muted: #6b7280;
            --border-glow: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.45);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-glow-purple: 0 0 20px rgba(168, 85, 247, 0.45);
            --shadow-glow-button: 0 0 18px rgba(0, 240, 255, 0.55);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --radius-faq: 12px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 20% 15%, rgba(0, 240, 255, 0.04) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 60%, rgba(168, 85, 247, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(0, 240, 255, 0.03) 0%, transparent 50%);
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            background-image:
                repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 240, 255, 0.015) 2px, rgba(0, 240, 255, 0.015) 2.5px),
                repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0, 240, 255, 0.015) 2px, rgba(0, 240, 255, 0.015) 2.5px);
            opacity: 0.6;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        .container-main {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 39, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 2px solid transparent;
            transition: border-color var(--transition-smooth), background var(--transition-smooth);
        }

        .site-header.scrolled {
            border-bottom-color: rgba(0, 240, 255, 0.35);
            background: rgba(10, 14, 39, 0.94);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            letter-spacing: 1px;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow-cyan);
        }

        .logo-text {
            font-weight: 700;
            font-size: 17px;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .logo-text:hover {
            color: var(--neon-cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links li a.active {
            color: var(--neon-cyan);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-purple));
            color: #fff;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            box-shadow: var(--shadow-glow-button);
            transition: all var(--transition-smooth);
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
            flex-shrink: 0;
        }

        .btn-nav-cta:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.75), 0 0 40px rgba(168, 85, 247, 0.4);
            transform: translateY(-1px);
            filter: brightness(1.1);
        }

        .btn-nav-cta:active {
            transform: scale(0.96);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }

        .btn-nav-cta:focus-visible {
            outline: 3px solid rgba(0, 240, 255, 0.7);
            outline-offset: 3px;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: #fff;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            margin: 6px 0;
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(10, 14, 39, 0.96);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .mobile-nav-overlay.show {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            padding: 12px 28px;
            border-radius: 8px;
            transition: all var(--transition-fast);
        }

        .mobile-nav-overlay a:hover {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        /* ========== 玻璃拟态卡片 ========== */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            overflow: hidden;
        }

        .glass-card:hover {
            border-color: var(--border-strong);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }

        .glass-card-highlight {
            background: rgba(20, 35, 65, 0.7);
            border: 2px solid rgba(0, 240, 255, 0.5);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(168, 85, 247, 0.3);
        }

        .glass-card-highlight:hover {
            border-color: rgba(0, 240, 255, 0.8);
            box-shadow: 0 12px 44px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 240, 255, 0.45), 0 0 48px rgba(168, 85, 247, 0.35);
        }

        /* ========== 发光按钮 ========== */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-purple));
            color: #fff;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-glow-button);
            transition: all var(--transition-smooth);
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
            letter-spacing: 0.5px;
        }

        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7), 0 0 50px rgba(168, 85, 247, 0.45);
            transform: translateY(-2px);
            filter: brightness(1.12);
        }
        .btn-glow:active {
            transform: scale(0.95);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }
        .btn-glow:focus-visible {
            outline: 3px solid rgba(0, 240, 255, 0.7);
            outline-offset: 4px;
        }

        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            background: transparent;
            color: var(--neon-cyan);
            border: 2px solid rgba(0, 240, 255, 0.5);
            cursor: pointer;
            transition: all var(--transition-smooth);
            letter-spacing: 0.5px;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.85);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            color: #fff;
        }
        .btn-outline-glow:active {
            transform: scale(0.96);
        }
        .btn-outline-glow:focus-visible {
            outline: 3px solid rgba(0, 240, 255, 0.6);
            outline-offset: 3px;
        }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 80px;
            padding-bottom: 60px;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 39, 0.75) 0%, rgba(10, 14, 39, 0.85) 50%, rgba(10, 14, 39, 0.92) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(circle at 30% 40%, rgba(0, 240, 255, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 70% 55%, rgba(168, 85, 247, 0.1) 0%, transparent 45%);
            z-index: 2;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 700px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.35);
            color: var(--neon-cyan);
            letter-spacing: 1px;
            margin-bottom: 20px;
            animation: pulse-badge 2.5s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
            }
        }

        .hero-burst-tag {
            position: absolute;
            top: 20px;
            right: 40px;
            z-index: 4;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: linear-gradient(135deg, #ff4d6a, #ff6b8a);
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            text-align: center;
            line-height: 1.3;
            box-shadow: 0 0 30px rgba(255, 77, 106, 0.6), 0 0 60px rgba(255, 77, 106, 0.3);
            animation: burst-rotate 8s ease-in-out infinite;
            letter-spacing: 1px;
            transform: rotate(12deg);
        }

        @keyframes burst-rotate {
            0%,
            100% {
                transform: rotate(12deg) scale(1);
            }
            30% {
                transform: rotate(14deg) scale(1.06);
            }
            60% {
                transform: rotate(10deg) scale(0.97);
            }
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, var(--neon-cyan) 0%, #ffffff 55%, #c4b5fd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-kpi-row {
            display: flex;
            gap: 32px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .hero-kpi {
            text-align: left;
        }

        .hero-kpi .kpi-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--neon-cyan);
            text-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            line-height: 1;
        }

        .hero-kpi .kpi-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ========== 板块通用 ========== */
        .section-block {
            padding: 80px 0;
            position: relative;
            z-index: 1;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin-bottom: 8px;
        }

        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            color: #fff;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 36px;
        }

        /* ========== 标签 ========== */
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--neon-cyan);
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .tag-purple {
            background: rgba(168, 85, 247, 0.12);
            color: var(--electric-purple);
            border: 1px solid rgba(168, 85, 247, 0.35);
        }

        .tag-hot {
            background: rgba(255, 77, 106, 0.15);
            color: #ff6b8a;
            border: 1px solid rgba(255, 77, 106, 0.4);
            animation: pulse-badge 2s ease-in-out infinite;
        }

        /* ========== 评价星标 ========== */
        .stars {
            display: inline-flex;
            gap: 2px;
            color: #fbbf24;
            font-size: 1rem;
        }

        /* ========== FAQ ========== */
        .faq-item {
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-faq);
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: var(--border-strong);
        }

        .faq-item.active {
            border-color: rgba(0, 240, 255, 0.55);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            background: rgba(20, 35, 65, 0.7);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            user-select: none;
            gap: 16px;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform var(--transition-smooth);
            font-size: 1.2rem;
            color: var(--neon-cyan);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: rgba(0, 240, 255, 0.3);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px 22px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: rgba(8, 12, 30, 0.9);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 60px 0 30px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 10px;
        }

        .footer-heading {
            font-weight: 700;
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links li a:hover {
            color: var(--neon-cyan);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }

        .footer-contact-item .icon-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-cyan);
            flex-shrink: 0;
            box-shadow: 0 0 6px rgba(0, 240, 255, 0.6);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-burst-tag {
                right: 16px;
                top: 100px;
                width: 70px;
                height: 70px;
                font-size: 12px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .btn-nav-cta.desktop-only {
                display: none;
            }
            .hamburger-btn {
                display: block;
            }
            .section-block {
                padding: 50px 0;
            }
            .hero-section {
                min-height: auto;
                padding-top: 100px;
                padding-bottom: 50px;
            }
            .hero-burst-tag {
                right: 10px;
                top: 90px;
                width: 60px;
                height: 60px;
                font-size: 11px;
            }
            .hero-kpi-row {
                gap: 18px;
            }
            .hero-kpi .kpi-num {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .hero-cta-group .btn-glow,
            .hero-cta-group .btn-outline-glow {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container-main {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .hero-burst-tag {
                display: none;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .glass-card {
                border-radius: 12px;
            }
        }

        /* 表单焦点发光 */
        input:focus,
        textarea:focus {
            border-color: var(--neon-cyan) !important;
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.4) !important;
            outline: none;
        }

        /* 滚动条 */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 240, 255, 0.25);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 240, 255, 0.45);
        }