/* roulang page: index */
:root {
            --primary: #0F172A;
            --primary-dark: #0B0F19;
            --accent: #00E599;
            --accent-blue: #3B82F6;
            --bg-light: #FAFAFC;
            --bg-white: #FFFFFF;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: rgba(15, 23, 42, 0.08);
            --border-hover: rgba(0, 229, 153, 0.4);
            --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --shadow-lift: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
            --radius-sm: 4px;
            --radius-md: 8px;
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            --container-width: 1280px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: var(--container-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部导航与信号条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-signal-bar {
            background-color: var(--primary-dark);
            color: #94A3B8;
            font-size: 0.75rem;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .top-signal-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .signal-indicator {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .signal-pulse {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .brand-logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-blue) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 1rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-link-item {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-body);
        }

        .nav-link-item:hover {
            color: var(--accent-blue);
        }

        .header-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            background-color: var(--primary);
            color: #fff;
            font-size: 0.875rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--primary);
            transition: var(--transition-smooth);
        }

        .header-cta-btn:hover {
            background-color: var(--accent);
            border-color: var(--accent);
            color: var(--primary);
        }

        /* Hero 沉浸区 */
        .hero-banner {
            position: relative;
            background-color: var(--primary-dark);
            color: #FFFFFF;
            padding: 100px 0 90px;
            overflow: hidden;
            background-image: linear-gradient(to bottom, rgba(11, 15, 25, 0.85), rgba(11, 15, 25, 0.95)), url('/assets/images/95b0a8b0d21e30f9.webp');
            background-size: cover;
            background-position: center;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge-wrap {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8125rem;
            color: var(--accent);
            margin-bottom: 24px;
        }

        .hero-h1 {
            font-size: clamp(2.25rem, 4.5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 24px;
            color: #FFFFFF;
        }

        .hero-h1 span {
            color: var(--accent);
        }

        .hero-lead-text {
            font-size: 1.0625rem;
            line-height: 1.8;
            color: #CBD5E1;
            margin-bottom: 36px;
        }

        .hero-action-group {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
        }

        .btn-prime {
            padding: 14px 28px;
            background-color: var(--accent);
            color: var(--primary);
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: 1px solid var(--accent);
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .btn-prime:hover {
            background-color: #fff;
            border-color: #fff;
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-ghost {
            padding: 14px 28px;
            background-color: transparent;
            color: #fff;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }

        .hero-countdown-box {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(8px);
        }

        .countdown-title {
            font-size: 0.875rem;
            color: #94A3B8;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .countdown-slots {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            text-align: center;
        }

        .slot-card {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 12px 6px;
            border-radius: var(--radius-sm);
        }

        .slot-num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            display: block;
        }

        .slot-desc {
            font-size: 0.75rem;
            color: #94A3B8;
        }

        /* 通用板块样式 */
        .section-block {
            padding: 90px 0;
            position: relative;
        }

        .section-block-alt {
            background-color: #FFFFFF;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-block-dark {
            background-color: var(--primary-dark);
            color: #FFFFFF;
        }

        .section-header {
            margin-bottom: 56px;
        }

        .section-subtitle {
            font-size: 0.8125rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-blue);
            font-weight: 700;
            margin-bottom: 10px;
            display: block;
        }

        .section-header-dark .section-subtitle {
            color: var(--accent);
        }

        .section-title {
            font-size: clamp(1.75rem, 3vw, 2.375rem);
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .section-header-dark .section-title {
            color: #FFFFFF;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.7;
        }

        .section-header-dark .section-desc {
            color: #94A3B8;
        }

        /* 规格参数标准条 */
        .specs-strip {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            padding: 32px 0;
        }

        .specs-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .spec-item {
            border-left: 2px solid var(--accent);
            padding-left: 18px;
        }

        .spec-num {
            font-size: 1.625rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .spec-label {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 矩阵卡片体系 */
        .grid-3col {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-2col {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 36px;
        }

        .content-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 32px;
            transition: var(--transition-smooth);
            position: relative;
        }

        .content-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lift);
        }

        .card-tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(59, 130, 246, 0.08);
            color: var(--accent-blue);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }

        .card-heading {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .card-paragraph {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .card-feature-list {
            list-style: none;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        .card-feature-list li {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card-feature-list li::before {
            content: "✓";
            color: var(--accent);
            font-weight: bold;
        }

        /* 图文横排版 */
        .dual-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .panel-visual-box {
            position: relative;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
        }

        .panel-badge-overlay {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(6px);
            color: #fff;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        /* 演播与制作深色卡片 */
        .dark-card {
            background: #151D2E;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm);
            padding: 30px;
            transition: var(--transition-smooth);
        }

        .dark-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }

        .dark-card-title {
            font-size: 1.1875rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .dark-card-text {
            font-size: 0.9375rem;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 进度与交付节点 */
        .roadmap-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .track-node {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-sm);
            position: relative;
        }

        .track-index {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-blue);
            opacity: 0.8;
            margin-bottom: 8px;
            display: block;
        }

        /* 成果墙媒体陈列 */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .gallery-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .gallery-thumb {
            height: 200px;
            overflow: hidden;
        }

        .gallery-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .gallery-item:hover .gallery-thumb img {
            transform: scale(1.05);
        }

        .gallery-info {
            padding: 20px;
            flex-grow: 1;
        }

        /* 对比表格面板 */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: #FFFFFF;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .comparison-table th,
        .comparison-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9375rem;
        }

        .comparison-table th {
            background: #F1F5F9;
            color: var(--primary);
            font-weight: 700;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .highlight-col {
            background-color: rgba(0, 229, 153, 0.04);
            font-weight: 600;
            color: var(--primary);
        }

        /* FAQ 手风琴逻辑 */
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question::after {
            content: "+";
            font-size: 1.25rem;
            font-weight: 400;
            color: var(--text-muted);
            transition: var(--transition-smooth);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
            color: var(--accent-blue);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-bottom: 20px;
        }

        /* 转化表单区 */
        .form-wrap-box {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 44px;
            box-shadow: var(--shadow-lift);
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .form-full {
            grid-column: span 2;
        }

        .form-field-label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .input-element {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.9375rem;
            outline: none;
            transition: var(--transition-smooth);
        }

        .input-element:focus {
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        /* 悬浮转化条 */
        .sticky-action-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 0;
            z-index: 990;
            transform: translateY(100%);
            transition: transform 0.35s ease;
        }

        .sticky-action-bar.visible {
            transform: translateY(0);
        }

        .sticky-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .sticky-text {
            color: #FFFFFF;
            font-size: 0.9375rem;
            font-weight: 500;
        }

        .sticky-text span {
            color: var(--accent);
            font-weight: 700;
        }

        /* 页脚体系 */
        .site-footer {
            background-color: var(--primary-dark);
            color: #94A3B8;
            padding: 80px 0 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.875rem;
        }

        .footer-cols {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-text {
            line-height: 1.7;
            margin-bottom: 20px;
            color: #64748B;
        }

        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 20px;
        }

        .footer-links-list {
            list-style: none;
        }

        .footer-links-list li {
            margin-bottom: 12px;
        }

        .footer-links-list a:hover {
            color: var(--accent);
        }

        .footer-bottom-bar {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .hero-layout {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .grid-3col, .gallery-grid, .roadmap-track {
                grid-template-columns: repeat(2, 1fr);
            }
            .specs-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-cols {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .grid-3col, .grid-2col, .gallery-grid, .dual-panel, .roadmap-track, .specs-grid {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-full {
                grid-column: span 1;
            }
            .footer-cols {
                grid-template-columns: 1fr;
            }
            .sticky-inner {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
        }