/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0A1A2F;
            --primary-light: #0B1D33;
            --primary-dark: #0A1626;
            --accent: #1E90FF;
            --teal: #00E5CC;
            --bg: #0A1626;
            --bg-2: #0E2239;
            --text: #F0F6FF;
            --text-secondary: rgba(240, 246, 255, 0.65);
            --text-weak: rgba(240, 246, 255, 0.35);
            --text-disabled: rgba(240, 246, 255, 0.2);
            --border: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-low: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-mid: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 28px rgba(30, 144, 255, 0.4);
            --transition: all .3s ease;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: linear-gradient(160deg, var(--primary-dark) 0%, var(--bg) 40%, var(--bg-2) 100%);
            color: var(--text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--teal);
        }
        button,
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 通用区块标题 ===== */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .8125rem;
            font-weight: 500;
            letter-spacing: .04em;
            color: var(--teal);
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-label::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--teal);
            box-shadow: 0 0 12px var(--teal);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 600;
            line-height: 1.25;
            margin-bottom: 16px;
            position: relative;
            padding-left: 20px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--accent), var(--teal));
            box-shadow: 0 0 16px rgba(0, 229, 204, .5);
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 720px;
            margin-bottom: 40px;
        }
        @media (max-width: 767.98px) {
            .section-title {
                font-size: 1.5rem;
                padding-left: 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            height: 70px;
            z-index: 1050;
            background: rgba(10, 22, 38, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .site-nav.scrolled {
            background: rgba(10, 22, 38, 0.92);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--text);
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), var(--teal));
            color: var(--primary-dark);
            font-size: .875rem;
            font-weight: 800;
            letter-spacing: -.02em;
            box-shadow: 0 0 20px rgba(0, 229, 204, .35);
        }
        .brand-text {
            font-size: 1.05rem;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            position: relative;
            font-size: .9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            right: 100%;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--teal);
            box-shadow: 0 0 12px var(--teal);
            transition: right .35s ease;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--teal);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            right: 0;
        }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #00A8CC);
            color: #fff;
            font-size: .9375rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            padding: .6rem 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(30, 144, 255, 0.35);
            transition: var(--transition);
        }
        .btn-glow:hover {
            box-shadow: 0 0 28px rgba(0, 229, 204, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: scale(.97);
            box-shadow: 0 0 12px rgba(30, 144, 255, .3);
        }
        .nav-toggler {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            line-height: 1;
            padding: 4px 8px;
            border-radius: 8px;
        }
        .nav-toggler:focus {
            outline: 2px solid var(--teal);
            outline-offset: 2px;
        }

        /* 移动端导航 */
        .mobile-panel {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 1040;
            background: rgba(10, 22, 38, 0.98);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            flex-direction: column;
            justify-content: center;
            padding: 24px;
        }
        .mobile-panel.open {
            display: flex;
        }
        .mobile-panel a {
            font-size: 1.375rem;
            color: var(--text);
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            font-weight: 500;
        }
        .mobile-panel a.active {
            color: var(--teal);
        }
        .mobile-panel .btn-glow {
            margin-top: 32px;
            justify-content: center;
            width: 100%;
        }
        .mobile-close {
            position: absolute;
            top: 20px;
            right: 24px;
            background: none;
            border: none;
            color: var(--text);
            font-size: 2rem;
            line-height: 1;
        }

        @media (max-width: 991.98px) {
            .nav-menu {
                display: none;
            }
            .nav-toggler {
                display: inline-flex;
            }
            .site-nav .btn-glow {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            padding: 140px 0 120px;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .35;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(110deg, rgba(10, 22, 38, .95) 25%, rgba(10, 22, 38, .65) 60%, rgba(14, 34, 57, .4) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            padding-top: 20px;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text);
            text-shadow: 0 4px 30px rgba(0, 0, 0, .4);
        }
        .hero-sub {
            font-size: 1.125rem;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 560px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #00A8CC);
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            padding: .75rem 2rem;
            border-radius: var(--radius-sm);
            border: none;
            box-shadow: 0 0 24px rgba(30, 144, 255, .4);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(0, 229, 204, .5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(.97);
            box-shadow: 0 0 14px rgba(30, 144, 255, .3);
        }
        .btn-glass {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text);
            font-size: 1rem;
            font-weight: 500;
            padding: .75rem 1.875rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-glass:hover {
            border-color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.12);
            color: var(--teal);
        }
        .hero-scroll {
            position: absolute;
            bottom: 120px;
            left: 50%;
            transform: translateX(-50%);
            color: var(--text-weak);
            font-size: 1.5rem;
            animation: bounce 2s infinite;
            z-index: 2;
        }
        @keyframes bounce {
            0%,
            100% {
                transform: translate(-50%, 0);
            }
            50% {
                transform: translate(-50%, 10px);
            }
        }

        /* ===== 倒计时条 ===== */
        .countdown-bar {
            position: sticky;
            top: 70px;
            z-index: 1000;
            max-width: 1160px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-pill);
            padding: 14px 28px;
            box-shadow: var(--shadow-mid);
        }
        .countdown-bar .text-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: .9375rem;
            font-weight: 500;
        }
        .countdown-bar .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--teal);
            box-shadow: 0 0 12px var(--teal);
            animation: pulse 1.4s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.4);
                opacity: .6;
            }
        }
        .countdown-timer {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .time-block {
            background: rgba(0, 0, 0, .35);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            padding: 6px 16px;
            display: flex;
            align-items: baseline;
            gap: 6px;
            min-width: 68px;
        }
        .time-block .num {
            font-family: 'JetBrains Mono', 'Courier New', monospace;
            font-size: 1.25rem;
            font-weight: 900;
            color: var(--teal);
            line-height: 1.2;
            text-shadow: 0 0 14px rgba(0, 229, 204, .35);
        }
        .time-block small {
            font-size: .75rem;
            color: var(--text-weak);
        }
        @media (max-width: 767.98px) {
            .countdown-bar {
                border-radius: 16px;
                padding: 16px 20px;
                justify-content: center;
            }
            .time-block .num {
                font-size: 1rem;
            }
        }
        @media (max-width: 575.98px) {
            .countdown-timer {
                justify-content: center;
            }
        }

        /* ===== 活动卖点 ===== */
        .features {
            padding: 96px 0;
            position: relative;
        }
        .features .container {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            border-radius: 32px;
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }
        .features .container::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(10, 22, 38, .92), rgba(14, 34, 57, .85));
            z-index: 0;
        }
        .features .row,
        .features .section-title,
        .features .section-desc,
        .features .section-label {
            position: relative;
            z-index: 1;
        }
        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            height: 100%;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(30, 144, 255, .4);
            background: rgba(255, 255, 255, 0.09);
            box-shadow: var(--shadow-mid);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(30, 144, 255, .25), rgba(0, 229, 204, .25));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--teal);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, .1);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text);
        }
        .feature-card p {
            font-size: .9375rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        @media (max-width: 991.98px) {
            .features {
                padding: 72px 0;
            }
            .features .container {
                padding: 36px 24px;
            }
            .feature-card {
                margin-bottom: 16px;
            }
        }
        @media (max-width: 575.98px) {
            .features .container {
                border-radius: 24px;
                padding: 32px 16px;
            }
        }

        /* ===== 图墙 ===== */
        .gallery-section {
            padding: 96px 0;
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 24px;
        }
        .gallery-right {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 24px;
        }
        .gallery-card {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            min-height: 260px;
            box-shadow: var(--shadow-low);
        }
        .gallery-card.large {
            min-height: 520px;
            border-radius: var(--radius-lg);
        }
        .gallery-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .gallery-card:hover img {
            transform: scale(1.02);
        }
        .gallery-overlay {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 24px;
            background: linear-gradient(transparent, rgba(0, 0, 0, .8));
            transition: var(--transition);
        }
        .gallery-card:hover .gallery-overlay {
            padding-bottom: 28px;
        }
        .gallery-overlay .g-tag {
            display: inline-block;
            font-size: .75rem;
            font-weight: 500;
            color: var(--teal);
            background: rgba(0, 229, 204, .12);
            border: 1px solid rgba(0, 229, 204, .3);
            border-radius: var(--radius-pill);
            padding: 2px 12px;
            margin-bottom: 10px;
        }
        .gallery-overlay h3 {
            font-size: 1.125rem;
            font-weight: 600;
            color: #fff;
            margin: 0;
        }
        .gallery-overlay .g-desc {
            font-size: .875rem;
            color: rgba(255, 255, 255, .7);
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .gallery-card:hover .g-desc {
            max-height: 60px;
            margin-top: 4px;
        }
        .g-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: .75rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--accent), #00A8CC);
            color: #fff;
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            box-shadow: 0 0 16px rgba(30, 144, 255, .4);
            z-index: 2;
        }
        @media (max-width: 991.98px) {
            .gallery-grid {
                grid-template-columns: 1fr;
            }
            .gallery-card.large {
                min-height: 340px;
            }
            .gallery-right {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 575.98px) {
            .gallery-right {
                grid-template-columns: 1fr;
            }
            .gallery-card,
            .gallery-card.large {
                min-height: 220px;
            }
        }

        /* ===== CTA区 ===== */
        .cta-section {
            padding: 96px 0;
            position: relative;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 22, 38, .95) 30%, rgba(14, 34, 57, .88) 80%);
        }
        .cta-card {
            position: relative;
            z-index: 1;
            max-width: 760px;
            margin: 0 auto;
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: 32px;
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow-mid);
        }
        .cta-card h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-card p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 32px;
        }
        .cta-btn-wrap {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-pulse {
            position: relative;
            z-index: 1;
        }
        .btn-pulse:hover {
            animation: pulesGlow 1s infinite;
        }
        @keyframes pulesGlow {
            0% {
                box-shadow: 0 0 16px rgba(0, 229, 204, .3);
            }
            50% {
                box-shadow: 0 0 42px rgba(0, 229, 204, .65);
            }
            100% {
                box-shadow: 0 0 16px rgba(0, 229, 204, .3);
            }
        }
        @media (max-width: 767.98px) {
            .cta-card {
                padding: 40px 24px;
                border-radius: 24px;
            }
            .cta-card h2 {
                font-size: 1.625rem;
            }
        }

        /* ===== 最新资讯 ===== */
        .news-section {
            padding: 96px 0;
            background: linear-gradient(180deg, rgba(10, 22, 38, .6), rgba(10, 22, 38, .9));
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .news-item:hover {
            border-color: rgba(30, 144, 255, .35);
            background: rgba(255, 255, 255, 0.07);
            transform: translateX(4px);
        }
        .news-badge {
            flex-shrink: 0;
            font-size: .75rem;
            font-weight: 500;
            background: rgba(0, 229, 204, .12);
            border: 1px solid rgba(0, 229, 204, .25);
            color: var(--teal);
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            white-space: nowrap;
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 6px;
            transition: var(--transition);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-body h4:hover {
            color: var(--accent);
        }
        .news-body p {
            font-size: .875rem;
            color: var(--text-secondary);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-time {
            flex-shrink: 0;
            font-size: .8125rem;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .news-time i {
            font-size: .875rem;
        }
        .news-arrow {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(30, 144, 255, .12);
            color: var(--accent);
            font-size: 1rem;
            transition: var(--transition);
        }
        .news-item:hover .news-arrow {
            background: var(--accent);
            color: #fff;
            transform: translateX(4px);
        }
        .news-empty {
            background: var(--glass-bg);
            border: 1px dashed rgba(255, 255, 255, .18);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-secondary);
            font-size: .9375rem;
        }
        @media (max-width: 767.98px) {
            .news-item {
                flex-wrap: wrap;
                padding: 16px;
            }
            .news-time {
                order: -1;
                width: 100%;
                font-size: .75rem;
            }
            .news-arrow {
                display: none;
            }
            .news-body h4 {
                white-space: normal;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 96px 0;
        }
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: var(--transition);
        }
        .faq-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(30, 144, 255, .4) !important;
            box-shadow: 0 0 20px rgba(30, 144, 255, .15);
        }
        .faq-item .accordion-button {
            background: transparent;
            color: var(--text);
            font-size: 1rem;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
        }
        .faq-item .accordion-button::after {
            background-image: none;
            font-family: 'bootstrap-icons';
            content: '\F4FE';
            font-size: 1.25rem;
            color: var(--teal);
            transition: transform .3s;
        }
        .faq-item .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .faq-item .accordion-button:not(.collapsed) {
            color: var(--teal);
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .accordion-body {
            color: var(--text-secondary);
            font-size: .9375rem;
            line-height: 1.7;
            padding: 0 24px 20px;
        }
        .faq-item {
            border-radius: var(--radius-md) !important;
        }
        @media (max-width: 575.98px) {
            .faq-item .accordion-button {
                font-size: .9375rem;
                padding: 16px 18px;
            }
            .faq-item .accordion-body {
                padding: 0 18px 16px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #071120;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 64px 0 0;
        }
        .footer-top {
            padding-bottom: 48px;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-desc {
            color: var(--text-secondary);
            font-size: .875rem;
            line-height: 1.6;
            max-width: 320px;
            margin-bottom: 20px;
        }
        .footer-title {
            font-size: .9375rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: .04em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: .875rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--teal);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            font-size: .8125rem;
            color: var(--text-weak);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: var(--text-weak);
        }
        .footer-bottom a:hover {
            color: var(--teal);
        }
        @media (max-width: 767.98px) {
            .site-footer {
                padding-top: 48px;
            }
            .footer-col {
                margin-bottom: 32px;
            }
            .footer-bottom .container {
                justify-content: center;
                text-align: center;
            }
        }

        /* ===== 通用 ===== */
        .section-muted {
            color: var(--text-weak);
            font-size: .875rem;
        }

        @media (max-width: 575.98px) {
            .hero {
                padding: 100px 0 90px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero-sub {
                font-size: .9375rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-glass {
                justify-content: center;
            }
            .features {
                padding: 56px 0;
            }
            .gallery-section {
                padding: 56px 0;
            }
            .cta-section {
                padding: 56px 0;
            }
            .news-section {
                padding: 56px 0;
            }
            .faq-section {
                padding: 56px 0;
            }
        }

/* roulang page: article */
:root {
            --primary: #0A1A2F;
            --primary-dark: #0B1D33;
            --primary-deep: #0A1626;
            --accent: #1E90FF;
            --accent-alt: #00E5CC;
            --bg-start: #0A1626;
            --bg-end: #0E2239;
            --text-main: #F0F6FF;
            --text-sub: rgba(240, 246, 255, 0.65);
            --text-weak: rgba(240, 246, 255, 0.35);
            --text-disabled: rgba(240, 246, 255, 0.2);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-bg-hover: rgba(255, 255, 255, 0.1);
            --radius-xl: 20px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-low: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 28px rgba(30, 144, 255, 0.4);
            --font-main: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
            --nav-h: 70px;
            --section-pad: 96px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-main);
            background: linear-gradient(160deg, var(--bg-start) 0%, var(--bg-end) 60%, #12283f 100%);
            background-attachment: fixed;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        body.nav-open {
            overflow: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--accent-alt);
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1320px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, #1E90FF, #00A8CC);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            line-height: 1;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 18px rgba(30, 144, 255, 0.35);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-glow:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 229, 204, 0.4);
            filter: brightness(1.1);
        }

        .btn-glow:active {
            transform: scale(0.97);
            box-shadow: 0 2px 12px rgba(30, 144, 255, 0.3);
        }

        .btn-glass {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 0.65rem 1.4rem;
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
        }

        .btn-glass:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.5);
            color: var(--text-main);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 0.5rem 1.1rem;
            font-size: 0.875rem;
        }

        /* 导航 */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-h);
            background: rgba(10, 22, 38, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.35s ease, box-shadow 0.35s ease;
        }

        .site-nav.scrolled {
            background: rgba(10, 22, 38, 0.92);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-h);
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
            font-size: 1.125rem;
            font-weight: 700;
            letter-spacing: 0.01em;
            transition: opacity 0.25s;
        }

        .brand:hover {
            color: var(--text-main);
            opacity: 0.85;
        }

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            background: linear-gradient(135deg, #1E90FF, #00E5CC);
            border-radius: 10px;
            color: #fff;
            font-size: 0.8125rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            box-shadow: 0 4px 14px rgba(30, 144, 255, 0.35);
        }

        .brand-text {
            font-size: 1.0625rem;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            color: var(--text-sub);
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 8px 2px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-alt);
            border-radius: 2px;
            box-shadow: 0 0 10px rgba(0, 229, 204, 0.5);
            transition: width 0.3s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--accent-alt);
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--accent-alt);
            box-shadow: 0 0 12px rgba(0, 229, 204, 0.7);
        }

        .nav-toggler {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            font-size: 1.25rem;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .nav-toggler:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.35);
        }

        .site-nav .btn-glow {
            margin-left: 8px;
        }

        @media (max-width: 991.98px) {
            .site-nav .btn-glow {
                display: none;
            }

            .nav-menu {
                display: none;
                position: fixed;
                top: var(--nav-h);
                left: 0;
                right: 0;
                bottom: 0;
                flex-direction: column;
                justify-content: flex-start;
                align-items: center;
                gap: 8px;
                padding: 32px 24px 120px;
                background: rgba(10, 22, 38, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                z-index: 1049;
                overflow-y: auto;
                margin-left: 0;
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu .nav-link {
                font-size: 1.0625rem;
                padding: 16px 8px;
                width: 100%;
                max-width: 420px;
                text-align: center;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                color: var(--text-sub);
            }

            .nav-menu .nav-link.active {
                color: var(--accent-alt);
            }

            .nav-menu .nav-link::after {
                display: none;
            }

            .nav-toggler {
                display: inline-flex;
            }

            body.nav-open .site-nav {
                background: rgba(10, 22, 38, 0.98);
            }
        }

        /* 面包屑 */
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.8125rem;
            color: var(--text-weak);
            margin-bottom: 18px;
        }

        .breadcrumb-nav a {
            color: var(--text-sub);
            transition: color 0.2s;
        }

        .breadcrumb-nav a:hover {
            color: var(--accent-alt);
        }

        .breadcrumb-nav .bi-chevron-right {
            font-size: 0.625rem;
            opacity: 0.6;
        }

        .breadcrumb-nav .current {
            color: var(--accent-alt);
            font-weight: 500;
        }

        /* 文章 Hero */
        .article-hero {
            position: relative;
            padding: calc(var(--nav-h) + 64px) 0 56px;
            background:
                linear-gradient(rgba(10, 22, 38, 0.85), rgba(10, 22, 38, 0.92)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .article-hero-inner {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .article-title {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-main);
            margin-bottom: 16px;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.875rem;
            color: var(--text-sub);
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta .badge-cat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(0, 229, 204, 0.15);
            border: 1px solid rgba(0, 229, 204, 0.3);
            color: var(--accent-alt);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.02em;
        }

        @media (max-width: 575.98px) {
            .article-hero {
                padding: calc(var(--nav-h) + 36px) 0 40px;
            }

            .article-title {
                font-size: 1.75rem;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.8125rem;
            }
        }

        /* 文章主体 */
        .article-section {
            padding: 56px 0 72px;
        }

        .article-body {
            max-width: 760px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-xl);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 48px 56px;
            box-shadow: var(--shadow-low);
            line-height: 1.8;
            font-size: 1rem;
            color: var(--text-main);
            word-break: break-word;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 600;
            line-height: 1.4;
            margin: 2em 0 0.8em;
            color: var(--text-main);
            padding-left: 14px;
            border-left: 3px solid var(--accent-alt);
            box-shadow: -6px 0 18px rgba(0, 229, 204, 0.12);
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            line-height: 1.4;
            margin: 1.8em 0 0.6em;
            color: var(--text-main);
            padding-left: 14px;
            border-left: 3px solid rgba(0, 229, 204, 0.6);
            box-shadow: -4px 0 12px rgba(0, 229, 204, 0.08);
        }

        .article-body p {
            margin-bottom: 1.5em;
            color: rgba(240, 246, 255, 0.85);
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5em;
            padding-left: 1.5em;
            color: rgba(240, 246, 255, 0.85);
        }

        .article-body li {
            margin-bottom: 0.4em;
        }

        .article-body blockquote {
            margin: 1.5em 0;
            padding: 16px 24px;
            background: rgba(255, 255, 255, 0.05);
            border-left: 4px solid var(--accent-alt);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-sub);
            font-style: normal;
        }

        .article-body img {
            width: auto;
            max-width: 100%;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.1);
            margin: 1.5em 0;
        }

        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-decoration-color: rgba(30, 144, 255, 0.4);
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--accent-alt);
            text-decoration-color: var(--accent-alt);
        }

        .article-body code {
            font-family: var(--font-mono);
            font-size: 0.875em;
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 8px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-body table {
            width: 100%;
            margin-bottom: 1.5em;
            border-collapse: collapse;
            font-size: 0.9375rem;
        }

        .article-body th,
        .article-body td {
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-align: left;
        }

        .article-body th {
            background: rgba(255, 255, 255, 0.06);
            font-weight: 600;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin: 2em 0;
        }

        .article-body iframe {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 1.5em 0;
        }

        @media (max-width: 767.98px) {
            .article-section {
                padding: 40px 0 56px;
            }

            .article-body {
                padding: 32px 24px;
                border-radius: var(--radius-lg);
            }
        }

        @media (max-width: 575.98px) {
            .article-body {
                padding: 24px 18px;
                border-radius: 14px;
            }

            .article-body h2 {
                font-size: 1.3rem;
            }

            .article-body h3 {
                font-size: 1.125rem;
            }
        }

        /* 内容未找到 */
        .not-found {
            text-align: center;
            padding: 48px 20px;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--text-weak);
        }

        .not-found h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .not-found p {
            color: var(--text-sub);
            margin-bottom: 24px;
            max-width: 420px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 相关阅读 */
        .related-posts {
            padding: 64px 0 24px;
            background: rgba(7, 17, 32, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: center;
            margin-bottom: 12px;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-sub);
            font-size: 0.9375rem;
            margin-bottom: 40px;
        }

        .related-card {
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            height: 100%;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(30, 144, 255, 0.4);
            box-shadow: var(--shadow-md);
        }

        .related-card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(7, 17, 32, 0.8) 100%);
        }

        .related-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card-body h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .related-card-body h3 a {
            color: var(--text-main);
            transition: color 0.2s;
        }

        .related-card-body h3 a:hover {
            color: var(--accent);
        }

        .related-card-body p {
            font-size: 0.875rem;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-weak);
        }

        @media (max-width: 767.98px) {
            .related-posts {
                padding: 48px 0 16px;
            }
        }

        /* CTA 区 */
        .page-cta {
            padding: 72px 0 96px;
        }

        .cta-card {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 56px 48px;
            background: linear-gradient(135deg, rgba(30, 144, 255, 0.1), rgba(0, 229, 204, 0.06));
            border: 1px solid rgba(30, 144, 255, 0.25);
            border-radius: var(--radius-xl);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 80px rgba(30, 144, 255, 0.08);
        }

        .cta-card h2 {
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .cta-card p {
            color: var(--text-sub);
            font-size: 0.9375rem;
            margin-bottom: 28px;
        }

        .cta-card .btn-glow {
            font-size: 1rem;
            padding: 0.875rem 2rem;
        }

        @media (max-width: 575.98px) {
            .page-cta {
                padding: 48px 0 64px;
            }

            .cta-card {
                padding: 40px 24px;
            }

            .cta-card h2 {
                font-size: 1.4rem;
            }
        }

        /* 页脚 */
        .site-footer {
            background: #071120;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 64px;
        }

        .footer-top {
            padding-bottom: 48px;
        }

        .footer-col {
            margin-bottom: 24px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-desc {
            color: var(--text-sub);
            font-size: 0.875rem;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-sub);
            font-size: 0.875rem;
            transition: all 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .footer-links a:hover {
            color: var(--accent-alt);
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-weak);
            font-size: 0.8125rem;
        }

        .footer-legal-links {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-legal-links a {
            color: var(--text-sub);
            font-size: 0.8125rem;
        }

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

        .footer-legal-links .divider {
            opacity: 0.4;
        }

        @media (max-width: 991.98px) {
            .footer-col {
                margin-bottom: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .site-footer {
                padding-top: 48px;
            }

            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
        }

        /* 通用 */
        .focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent-alt);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .back-to-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1E90FF, #00A8CC);
            color: #fff;
            border: none;
            font-size: 1.125rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(30, 144, 255, 0.4);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
            z-index: 1040;
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            filter: brightness(1.1);
            transform: translateY(-3px);
        }

/* roulang page: category1 */
:root {
            --primary-blue: #1E90FF;
            --accent-cyan: #00E5CC;
            --bg-dark: #0A1626;
            --bg-deep: #0B1D33;
            --bg-card: rgba(255,255,255,0.06);
            --bg-card-hover: rgba(255,255,255,0.10);
            --border-glass: rgba(255,255,255,0.12);
            --border-light: rgba(255,255,255,0.20);
            --text-main: #F0F6FF;
            --text-secondary: rgba(240,246,255,0.65);
            --text-muted: rgba(240,246,255,0.35);
            --text-faint: rgba(240,246,255,0.20);
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --radius-btn: 12px;
            --shadow-card: 0 4px 12px rgba(0,0,0,0.25);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.35);
            --shadow-glow: 0 0 28px rgba(30,144,255,0.40);
            --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
            --transition: all 0.3s ease;
            --section-pad: 96px;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: linear-gradient(135deg, #0A1626 0%, #0E2239 50%, #0A1626 100%);
            background-attachment: fixed;
            color: var(--text-main);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button {
            font-family: inherit;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(30,144,255,0.40);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(30,144,255,0.60);
        }
        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-pad {
            padding: var(--section-pad) 0;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            background: rgba(0,229,204,0.10);
            border: 1px solid rgba(0,229,204,0.25);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 18px;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary-blue), var(--accent-cyan));
            box-shadow: 0 0 12px rgba(0,229,204,0.50);
        }

        /* === 导航 === */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: 70px;
            background: rgba(10,22,38,0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-nav.scrolled {
            background: rgba(10,22,38,0.92);
            box-shadow: 0 4px 20px rgba(0,0,0,0.30);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--text-main);
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 0.85rem;
            letter-spacing: 0.02em;
            box-shadow: 0 0 16px rgba(30,144,255,0.35);
        }
        .brand-text {
            font-weight: 700;
            letter-spacing: 0.01em;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-block;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: 8px;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255,255,255,0.04);
        }
        .nav-link.active {
            color: var(--accent-cyan);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 8px rgba(0,229,204,0.50);
        }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, #1E90FF, #00A8CC);
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 600;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(30,144,255,0.30);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-glow:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0,229,204,0.40);
            filter: brightness(1.10);
        }
        .btn-glow:active {
            transform: scale(0.97);
            box-shadow: 0 0 12px rgba(30,144,255,0.25);
        }
        .nav-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-main);
            font-size: 1.4rem;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggler:hover {
            border-color: var(--border-light);
            background: rgba(255,255,255,0.06);
        }

        /* === 页面 Hero === */
        .page-hero {
            position: relative;
            padding: 150px 0 64px;
            background: linear-gradient(135deg, rgba(10,22,38,0.90) 0%, rgba(14,34,57,0.80) 100%),
                        url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--border-glass);
        }
        .breadcrumb-nav {
            margin-bottom: 22px;
        }
        .breadcrumb-nav .breadcrumb {
            margin: 0;
            padding: 0;
            background: none;
        }
        .breadcrumb-nav .breadcrumb-item {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .breadcrumb-nav .breadcrumb-item::before {
            color: var(--text-muted);
        }
        .breadcrumb-nav .breadcrumb-item a {
            color: var(--text-secondary);
        }
        .breadcrumb-nav .breadcrumb-item a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-nav .breadcrumb-item.active {
            color: var(--accent-cyan);
        }
        .page-hero-inner {
            max-width: 680px;
        }
        .page-title {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin: 0 0 16px 0;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }
        .page-subtitle {
            font-size: 1.0625rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
            max-width: 600px;
        }

        /* === 内容主体 === */
        .cat-main {
            padding: 72px 0 56px;
        }
        .cat-overview,
        .rule-modules,
        .cat-scenarios,
        .cat-process {
            margin-bottom: 56px;
        }
        .cat-overview p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .overview-points {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 20px;
        }
        .overview-point {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
        }
        .overview-point i {
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        /* 规则卡 */
        .rule-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            height: 100%;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: var(--transition);
        }
        .rule-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(30,144,255,0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .rule-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(30,144,255,0.25), rgba(0,229,204,0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            border: 1px solid rgba(0,229,204,0.20);
        }
        .rule-card h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .rule-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* 场景卡 */
        .scenario-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }
        .scenario-card:hover {
            border-color: rgba(0,229,204,0.35);
            box-shadow: 0 8px 24px rgba(0,0,0,0.30);
            transform: translateY(-3px);
        }
        .scenario-num {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 800;
            color: rgba(30,144,255,0.25);
            line-height: 1;
            display: block;
            margin-bottom: 14px;
        }
        .scenario-card h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .scenario-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 流程 */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .process-item {
            display: flex;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            position: relative;
        }
        .process-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .process-item:first-child {
            padding-top: 0;
        }
        .process-step {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
            color: #fff;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 0.9375rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 14px rgba(30,144,255,0.30);
        }
        .process-item h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .process-item p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* CTA条带 */
        .cat-cta {
            background: linear-gradient(135deg, rgba(30,144,255,0.12), rgba(0,229,204,0.08));
            border: 1px solid rgba(0,229,204,0.25);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .cat-cta h3 {
            font-size: 1.375rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .cat-cta p {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            margin-bottom: 20px;
        }
        .cat-cta .btn-glow {
            font-size: 1rem;
            padding: 12px 28px;
        }

        /* 侧栏 */
        .cat-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 90px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .sidebar-title {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            position: relative;
        }
        .sidebar-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -1px;
            width: 36px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .badge-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.05);
            border: 1px solid var(--border-glass);
            border-radius: 999px;
            padding: 5px 14px;
            transition: var(--transition);
        }
        .badge-tag:hover {
            color: var(--accent-cyan);
            border-color: rgba(0,229,204,0.40);
            background: rgba(0,229,204,0.08);
            transform: translateY(-1px);
        }
        .sidebar-cover {
            padding: 0;
            overflow: hidden;
            position: relative;
        }
        .sidebar-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .sidebar-cover-text {
            padding: 16px 20px 20px;
        }
        .badge-hot {
            display: inline-block;
            font-size: 0.6875rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
            border-radius: 999px;
            padding: 3px 12px;
            margin-bottom: 10px;
        }
        .sidebar-cover-text p {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* === FAQ === */
        .cat-faq {
            padding: 72px 0 96px;
        }
        .faq-header {
            margin-bottom: 32px;
        }
        .accordion {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass) !important;
            border-radius: var(--radius-md) !important;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(0,229,204,0.35) !important;
            box-shadow: 0 0 20px rgba(0,229,204,0.08);
        }
        .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 18px 22px;
            border: none;
            line-height: 1.4;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(255,255,255,0.02);
            color: var(--accent-cyan);
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5CC'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            width: 1rem;
            height: 1rem;
            transition: transform 0.3s ease;
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }
        .accordion-body {
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.7;
            padding: 4px 22px 20px;
            background: transparent;
        }

        /* === 页脚 === */
        .site-footer {
            background: #071120;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-top {
            padding: 60px 0 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
            max-width: 320px;
        }
        .btn-glass {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.18);
            color: var(--text-main);
            font-size: 0.875rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
        }
        .btn-glass:hover {
            border-color: rgba(255,255,255,0.50);
            background: rgba(255,255,255,0.12);
            color: var(--text-main);
        }
        .btn-glass.btn-sm {
            font-size: 0.8125rem;
            padding: 6px 14px;
        }
        .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        .footer-bottom {
            background: rgba(0,0,0,0.25);
            padding: 18px 0;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
        }
        .footer-bottom-links a {
            color: var(--text-muted);
        }
        .footer-bottom-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom-links .divider {
            color: rgba(255,255,255,0.15);
        }

        /* === 响应式 === */
        @media (max-width: 1200px) {
            .container {
                max-width: 1140px;
            }
        }
        @media (max-width: 991.98px) {
            :root {
                --section-pad: 72px;
            }
            .nav-toggler {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(10,22,38,0.96);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                padding: 100px 32px 32px;
                gap: 4px;
                transform: translateX(100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s ease;
                z-index: 1040;
            }
            .nav-menu.open {
                transform: translateX(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-menu .nav-link {
                font-size: 1.0625rem;
                padding: 18px 12px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .nav-menu .nav-link.active::after {
                left: 12px;
                right: auto;
                width: 32px;
            }
            .nav-wrap .btn-glow {
                display: none;
            }
            .nav-menu .nav-cta-mobile {
                display: flex;
                margin-top: auto;
                margin-bottom: 32px;
            }
            .cat-sidebar {
                position: static;
            }
            .page-title {
                font-size: 2rem;
            }
        }
        @media (min-width: 992px) {
            .nav-menu .nav-cta-mobile {
                display: none;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --section-pad: 56px;
            }
            .page-hero {
                padding: 130px 0 48px;
            }
            .page-title {
                font-size: 1.75rem;
            }
            .page-subtitle {
                font-size: 0.9375rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .cat-main {
                padding: 48px 0 40px;
            }
            .cat-cta {
                padding: 28px 20px;
            }
            .footer-top {
                padding: 44px 0 32px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-title {
                font-size: 1.5rem;
            }
            .overview-point {
                font-size: 0.8125rem;
                padding: 8px 12px;
            }
            .rule-card {
                padding: 20px 16px;
            }
            .scenario-card {
                padding: 18px 16px;
            }
            .process-item {
                gap: 14px;
                padding: 16px 0;
            }
            .process-step {
                width: 30px;
                height: 30px;
                font-size: 0.8125rem;
            }
            .cat-cta h3 {
                font-size: 1.125rem;
            }
            .accordion-button {
                font-size: 0.875rem;
                padding: 14px 16px;
            }
            .accordion-body {
                padding: 0 16px 16px;
                font-size: 0.8125rem;
            }
            .brand-text {
                font-size: 0.95rem;
            }
        }