:root {
            --bn-primary: #f3ba2f;
            --bn-dark: #020617;
            --bn-bg: #01010a;
            --bn-card: #020617;
            --bn-border: #1e293b;
            --bn-text: #e5e7eb;
            --bn-muted: #9ca3af;
            --bn-accent: #22c55e;
            --bn-danger: #f97373;
        }

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

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            background:
                radial-gradient(circle at 0 0, #0b1220 0%, #020617 50%, #000 100%);
            color: var(--bn-text);
            line-height: 1.6;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        .bn-container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 16px;
        }

        /* ===== 图标样式 ===== */
        .bn-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        
        .bn-icon-logo {
            width: 24px;
            height: 24px;
            background: var(--bn-primary);
            border-radius: 6px;
            color: #020617;
            font-weight: bold;
            font-size: 14px;
        }
        
        .bn-icon-trade {
            width: 18px;
            height: 18px;
            background: linear-gradient(135deg, #f3ba2f, #f97316);
            border-radius: 4px;
            position: relative;
        }
        
        .bn-icon-trade::before {
            content: "";
            position: absolute;
            width: 8px;
            height: 8px;
            background: #020617;
            border-radius: 1px;
            top: 5px;
            left: 5px;
        }
        
        .bn-icon-security {
            width: 18px;
            height: 18px;
            background: linear-gradient(135deg, #22c55e, #16a34a);
            border-radius: 4px;
            position: relative;
        }
        
        .bn-icon-security::before {
            content: "";
            position: absolute;
            width: 10px;
            height: 8px;
            border-left: 2px solid #020617;
            border-bottom: 2px solid #020617;
            top: 3px;
            left: 4px;
            transform: rotate(-45deg);
        }
        
        .bn-icon-ui {
            width: 18px;
            height: 18px;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            border-radius: 4px;
            position: relative;
        }
        
        .bn-icon-ui::before {
            content: "";
            position: absolute;
            width: 8px;
            height: 8px;
            border: 2px solid #020617;
            border-radius: 1px;
            top: 3px;
            left: 3px;
        }
        
        .bn-icon-device {
            width: 18px;
            height: 18px;
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
            border-radius: 4px;
            position: relative;
        }
        
        .bn-icon-device::before {
            content: "";
            position: absolute;
            width: 10px;
            height: 6px;
            border: 2px solid #020617;
            border-radius: 1px;
            top: 4px;
            left: 2px;
        }
        
        .bn-icon-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: #020617;
        }
        
        .bn-avatar-trader {
            background: linear-gradient(135deg, #f3ba2f, #f97316);
        }
        
        .bn-avatar-newuser {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
        }
        
        .bn-avatar-community {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }
        
        .bn-icon-dashboard {
            width: 100%;
            height: 120px;
            background: linear-gradient(135deg, #1e293b, #334155);
            border-radius: 12px;
            position: relative;
            overflow: hidden;
        }
        
        .bn-icon-dashboard::before {
            content: "";
            position: absolute;
            width: 80%;
            height: 20px;
            background: #0f172a;
            top: 20px;
            left: 10%;
            border-radius: 4px;
        }
        
        .bn-icon-dashboard::after {
            content: "";
            position: absolute;
            width: 60%;
            height: 40px;
            background: #0f172a;
            top: 50px;
            left: 10%;
            border-radius: 4px;
        }
        
        .bn-icon-phone {
            width: 190px;
            height: 380px;
            background: linear-gradient(135deg, #1e293b, #334155);
            border-radius: 28px;
            position: relative;
            overflow: hidden;
            margin: 0 auto;
        }
        
        .bn-icon-phone::before {
            content: "";
            position: absolute;
            width: 90%;
            height: 30px;
            background: #0f172a;
            top: 20px;
            left: 5%;
            border-radius: 15px;
        }
        
        .bn-icon-phone::after {
            content: "";
            position: absolute;
            width: 80%;
            height: 280px;
            background: #0f172a;
            top: 70px;
            left: 10%;
            border-radius: 12px;
        }
        
        .bn-icon-feature {
            width: 100%;
            height: 120px;
            background: linear-gradient(135deg, #1e293b, #334155);
            border-radius: 14px;
            position: relative;
        }
        
        .bn-icon-feature::before {
            content: "";
            position: absolute;
            width: 80%;
            height: 10px;
            background: #0f172a;
            top: 30px;
            left: 10%;
            border-radius: 5px;
        }
        
        .bn-icon-feature::after {
            content: "";
            position: absolute;
            width: 60%;
            height: 10px;
            background: #0f172a;
            top: 50px;
            left: 10%;
            border-radius: 5px;
        }
        
        .bn-icon-onboarding {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, #22c55e, #16a34a);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #020617;
            font-size: 20px;
        }
        
        .bn-icon-security-visual {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1e293b, #334155);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        .bn-icon-security-visual::before {
            content: "🔒";
            font-size: 24px;
        }
        
        .bn-icon-environment {
            width: 100%;
            height: 100px;
            background: linear-gradient(135deg, #1e293b, #334155);
            border-radius: 12px;
            position: relative;
        }
        
        .bn-icon-environment::before {
            content: "";
            position: absolute;
            width: 30px;
            height: 30px;
            background: #0f172a;
            border-radius: 50%;
            top: 20px;
            left: 20px;
        }
        
        .bn-icon-environment::after {
            content: "";
            position: absolute;
            width: 40px;
            height: 30px;
            background: #0f172a;
            border-radius: 8px;
            top: 20px;
            left: 70px;
        }
        
        .bn-icon-disclaimer {
            width: 100%;
            height: 100px;
            background: linear-gradient(135deg, #1e293b, #334155);
            border-radius: 12px;
            position: relative;
        }
        
        .bn-icon-disclaimer::before {
            content: "⚠️";
            position: absolute;
            font-size: 24px;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .bn-icon-disclaimer::after {
            content: "";
            position: absolute;
            width: 80%;
            height: 10px;
            background: #0f172a;
            border-radius: 5px;
            bottom: 20px;
            left: 10%;
        }

        /* ===== 顶部导航 ===== */
        .bn-header {
            position: sticky;
            top: 0;
            z-index: 999;
            backdrop-filter: blur(18px);
            background: linear-gradient(to bottom, rgba(2,6,23,0.96), rgba(2,6,23,0.7));
            border-bottom: 1px solid rgba(148,163,184,0.2);
        }

        .bn-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
        }

        .bn-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .bn-logo-icon-wrap {
            width: 36px;
            height: 36px;
            border-radius: 12px;
            border: 1px solid rgba(248,250,252,0.35);
            background:
                radial-gradient(circle at 20% 0, #fefce8 0%, #facc15 40%, #92400e 100%);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .bn-logo-text-main {
            font-weight: 700;
            letter-spacing: 0.04em;
            font-size: 16px;
        }

        .bn-logo-text-sub {
            font-size: 11px;
            color: var(--bn-muted);
        }

        .bn-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            font-size: 14px;
        }

        .bn-nav a {
            color: var(--bn-muted);
            position: relative;
            padding-bottom: 4px;
        }

        .bn-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(to right, #f97316, var(--bn-primary));
            transition: width 0.2s ease;
        }

        .bn-nav a:hover,
        .bn-nav a.bn-nav-active {
            color: #f9fafb;
        }

        .bn-nav a:hover::after,
        .bn-nav a.bn-nav-active::after {
            width: 100%;
        }

        .bn-nav-cta {
            padding: 8px 18px;
            border-radius: 999px;
            border: 1px solid rgba(250,250,250,0.25);
            background: radial-gradient(circle at top left, #facc15, #f97316);
            color: #111827;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 10px 30px rgba(234,179,8,0.4);
            white-space: nowrap;
        }

        .bn-nav-cta:hover {
            filter: brightness(1.05);
        }

        /* ===== 主体布局 ===== */
        .bn-main {
            padding: 24px 0 80px;
        }

        .bn-layout {
            display: grid;
            grid-template-columns: minmax(0, 2.1fr) minmax(0, 0.9fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .bn-layout {
                grid-template-columns: minmax(0,1fr);
            }
        }

        /* ===== Hero 区 ===== */
        .bn-hero {
            padding: 26px 22px 22px;
            border-radius: 24px;
            background:
                radial-gradient(circle at top left, rgba(250,204,21,0.22), rgba(15,23,42,0.98));
            border: 1px solid rgba(148,163,184,0.4);
            box-shadow:
                0 30px 80px rgba(15,23,42,0.9),
                0 0 0 1px rgba(15,23,42,0.9) inset;
            display: grid;
            grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.15fr);
            gap: 26px;
            position: relative;
            overflow: hidden;
        }

        .bn-hero::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -120px;
            width: 260px;
            height: 260px;
            border-radius: 999px;
            background: radial-gradient(circle, rgba(248,250,252,0.07), transparent 70%);
            opacity: 0.9;
        }

        @media (max-width: 900px) {
            .bn-hero {
                grid-template-columns: minmax(0,1fr);
            }
        }

        .bn-hero-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 3px 10px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.7);
            background: rgba(15,23,42,0.6);
            font-size: 11px;
            color: var(--bn-muted);
        }

        .bn-hero-pill-dot {
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: var(--bn-accent);
            box-shadow: 0 0 12px rgba(34,197,94,0.8);
        }

        .bn-hero-title {
            font-size: 28px;
            margin: 10px 0 12px;
			color: var(--bn-primary);
        }

        .bn-hero-title span {
            color: var(--bn-primary);
        }

        .bn-hero-sub {
            font-size: 14px;
            color: var(--bn-muted);
            max-width: 520px;
        }

        .bn-hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }

        .bn-tag {
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.6);
            font-size: 11px;
            color: var(--bn-muted);
            background: rgba(15,23,42,0.7);
        }

        .bn-hero-actions {
            margin-top: 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .bn-btn-primary {
            padding: 10px 18px;
            border-radius: 999px;
            background: radial-gradient(circle at top left, #fde68a, var(--bn-primary));
            border: none;
            font-size: 14px;
            font-weight: 600;
            color: #111827;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .bn-btn-primary:hover {
            filter: brightness(1.04);
        }

        .bn-btn-outline {
            padding: 9px 16px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.8);
            background: transparent;
            font-size: 13px;
            color: var(--bn-text);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .bn-btn-outline:hover {
            background: rgba(15,23,42,0.8);
        }

        .bn-hero-meta {
            margin-top: 14px;
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-hero-meta strong {
            color: #e5e7eb;
        }

        .bn-hero-media {
            position: relative;
            z-index: 1;
        }

        .bn-hero-phone-wrap {
            position: absolute;
            right: -8px;
            top: -10px;
            width: 190px;
            transform: rotate(6deg);
            filter: drop-shadow(0 14px 36px rgba(0,0,0,0.85));
        }

        .bn-hero-dashboard-wrap {
            border-radius: 18px;
            background: radial-gradient(circle at top, #020617, #020617 55%, #000);
            border: 1px solid rgba(148,163,184,0.5);
            padding: 14px;
            box-shadow: 0 22px 60px rgba(15,23,42,0.95);
            position: relative;
            overflow: hidden;
        }

        .bn-hero-card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
            font-size: 12px;
        }

        .bn-hero-card-title {
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .bn-dot {
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: var(--bn-accent);
        }

        .bn-hero-card-badge {
            font-size: 11px;
            padding: 3px 9px;
            border-radius: 999px;
            border: 1px solid rgba(59,130,246,0.9);
            color: #bfdbfe;
        }

        .bn-hero-dashboard-img {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(55,65,81,0.7);
            margin-bottom: 10px;
        }
        
        .bn-hero-dashboard-img img{
            width: 40%;
        }

        .bn-hero-chart-footer {
            display: flex;
            justify-content: space-between;
            margin-top: 4px;
            color: var(--bn-muted);
            font-size: 11px;
        }

        .bn-hero-safe-tip {
            margin-top: 8px;
            font-size: 11px;
            padding: 7px 10px;
            border-radius: 10px;
            background: rgba(22,163,74,0.12);
            border: 1px solid rgba(34,197,94,0.4);
            color: #bbf7d0;
        }

        /* ===== 品牌条（媒体 / 合作伙伴） ===== */
        .bn-brand-strip {
            margin-top: 18px;
            padding: 10px 18px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.35);
            background: radial-gradient(circle at left, rgba(15,23,42,0.95), rgba(15,23,42,0.85));
            display: flex;
            align-items: center;
            gap: 14px;
            overflow: hidden;
        }

        .bn-brand-label {
            font-size: 12px;
            color: var(--bn-muted);
            white-space: nowrap;
        }

        .bn-brand-logos {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .bn-brand-logo-item img {
            height: 20px;
            opacity: 0.8;
        }

        /* ===== 通用模块样式 ===== */
        .bn-section {
            margin-top: 26px;
            padding: 20px 22px;
            border-radius: 20px;
            background: radial-gradient(circle at top left, rgba(15,23,42,0.98), rgba(2,6,23,0.98));
            border: 1px solid rgba(30,64,175,0.4);
        }

        .bn-section-title {
            font-size: 20px;
            margin: 0 0 6px;
        }

        .bn-section-title span {
            color: var(--bn-primary);
        }

        .bn-section-sub {
            font-size: 13px;
            color: var(--bn-muted);
            margin-bottom: 12px;
        }

        /* ===== App 下载区 ===== */
        .bn-download-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
            gap: 20px;
        }

        @media (max-width: 900px) {
            .bn-download-layout {
                grid-template-columns: minmax(0,1fr);
            }
        }

        .bn-download-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0,1fr));
            gap: 14px;
            margin-top: 8px;
        }

        @media (max-width: 900px) {
            .bn-download-grid {
                grid-template-columns: repeat(2, minmax(0,1fr));
            }
        }

        @media (max-width: 640px) {
            .bn-download-grid {
                grid-template-columns: minmax(0,1fr);
            }
        }

        .bn-download-card {
            border-radius: 14px;
            padding: 12px 12px 14px;
            background: rgba(15,23,42,0.96);
            border: 1px solid rgba(51,65,85,0.9);
            font-size: 13px;
        }

        .bn-download-tag {
            font-size: 11px;
            color: var(--bn-muted);
            margin-bottom: 4px;
        }

        .bn-download-name {
            font-weight: 600;
            margin-bottom: 6px;
        }

        .bn-download-meta {
            font-size: 11px;
            color: var(--bn-muted);
            margin-bottom: 10px;
        }

        .bn-download-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            padding: 7px 12px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.9);
            cursor: pointer;
        }

        .bn-download-btn-primary {
            border-color: transparent;
            background: linear-gradient(to right, #f97316, var(--bn-primary));
            color: #111827;
        }

        .bn-download-btn:hover {
            filter: brightness(1.05);
        }

        .bn-download-visual {
            border-radius: 18px;
            background: radial-gradient(circle at top, rgba(15,23,42,0.98), rgba(15,23,42,0.9));
            border: 1px solid rgba(55,65,81,0.9);
            padding: 12px 12px 10px;
            display: flex;
            flex-direction: column;
            gap: 8px;

            align-items: center;
            justify-content: center;
        }

        .bn-download-badges {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .bn-download-badge {
            height: 28px;
        }

        /* ===== App 截图展示 ===== */
        .bn-screenshot-hero {
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid rgba(55,65,81,0.85);
            margin-bottom: 10px;
        }

        .bn-screenshot-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 14px;
        }

        @media (max-width: 900px) {
            .bn-screenshot-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        @media (max-width: 640px) {
            .bn-screenshot-grid {
                grid-template-columns: minmax(0, 1fr);
            }
        }

        .bn-screenshot-item {
            border-radius: 14px;
            padding: 10px;
            background: rgba(15, 23, 42, 0.96);
            border: 1px solid rgba(51, 65, 85, 0.9);
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-screenshot-thumb {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(30, 64, 175, 0.7);
            margin-bottom: 6px;
        }

        /* ===== 功能亮点 ===== */
        .bn-feature-layout {
            display: grid;
            grid-template-columns: minmax(0,1.1fr) minmax(0,1fr);
            gap: 20px;
        }

        @media (max-width: 900px) {
            .bn-feature-layout {
                grid-template-columns: minmax(0,1fr);
            }
        }

        .bn-feature-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0,1fr));
            gap: 14px;
            margin-top: 8px;
        }

        @media (max-width: 768px) {
            .bn-feature-grid {
                grid-template-columns: minmax(0,1fr);
            }
        }

        .bn-feature-item {
            padding: 10px 12px;
            border-radius: 14px;
            background: rgba(15,23,42,0.96);
            border: 1px solid rgba(30,64,175,0.5);
            font-size: 13px;
            display: grid;
            grid-template-columns: 32px minmax(0,1fr);
            gap: 8px;
        }

        .bn-feature-icon {
            width: 32px;
            height: 32px;
            border-radius: 999px;
            background: radial-gradient(circle at top, rgba(248,250,252,0.18), rgba(15,23,42,1));
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(55,65,81,0.9);
        }

        .bn-feature-item h3 {
            margin: 0 0 4px;
            font-size: 14px;
        }

        .bn-feature-item p {
            margin: 0;
            color: var(--bn-muted);
        }

        .bn-feature-visual {
            border-radius: 18px;
            border: 1px solid rgba(55,65,81,0.9);
            background: radial-gradient(circle at top, rgba(15,23,42,0.98), rgba(2,6,23,0.98));
            padding: 10px;
        }

        /* ===== 新手三步走 ===== */
        .bn-step-list {
            margin: 8px 0 0;
            padding-left: 18px;
            font-size: 13px;
        }

        .bn-step-list li + li {
            margin-top: 4px;
        }

        .bn-step-banner {
            margin-top: 10px;
            border-radius: 14px;
            padding: 10px 12px;
            border: 1px dashed rgba(55,65,81,0.9);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--bn-muted);
        }

        /* ===== 网络评论 / 用户评价 ===== */
        .bn-review-list {
            margin-top: 10px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .bn-review-item {
            padding: 10px 12px;
            border-radius: 14px;
            background: rgba(15, 23, 42, 0.96);
            border: 1px solid rgba(55, 65, 81, 0.9);
            font-size: 13px;
            display: grid;
            grid-template-columns: 40px minmax(0,1fr);
            gap: 8px;
        }

        .bn-review-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 4px;
        }

        .bn-review-source {
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-stars {
            font-size: 12px;
            color: #facc15;
        }

        .bn-review-text {
            color: var(--bn-muted);
            margin-top: 4px;
            line-height: 1.5;
        }

        /* ===== 下载数据 / 统计 ===== */
        .bn-stat-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 14px;
            margin-top: 10px;
        }

        @media (max-width: 900px) {
            .bn-stat-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        @media (max-width: 640px) {
            .bn-stat-grid {
                grid-template-columns: minmax(0, 1fr);
            }
        }

        .bn-stat-item {
            border-radius: 14px;
            padding: 10px 12px;
            background: rgba(15, 23, 42, 0.96);
            border: 1px solid rgba(37, 99, 235, 0.7);
            font-size: 13px;
        }

        .bn-stat-label {
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-stat-value {
            margin-top: 4px;
            font-size: 18px;
            font-weight: 600;
        }

        .bn-stat-desc {
            margin-top: 4px;
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-stat-bar-track {
            margin-top: 8px;
            width: 100%;
            height: 6px;
            border-radius: 999px;
            background: rgba(15, 23, 42, 0.9);
            border: 1px solid rgba(30, 64, 175, 0.7);
            overflow: hidden;
        }

        .bn-stat-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(to right, #f97316, var(--bn-primary));
            width: 70%;
        }

        /* ===== 安全提示 ===== */
        .bn-security-list {
            margin: 6px 0 0;
            padding-left: 18px;
            font-size: 13px;
            color: var(--bn-muted);
        }

        .bn-security-visual {
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-security-warning {
            margin-top: 10px;
            font-size: 12px;
            padding: 8px 10px;
            border-radius: 10px;
            background: rgba(127,29,29,0.35);
            border: 1px solid rgba(248,113,113,0.8);
            color: #fecaca;
        }

        /* ===== FAQ ===== */
        .bn-faq-list {
            margin-top: 8px;
            font-size: 13px;
        }

        .bn-faq-item + .bn-faq-item {
            margin-top: 8px;
            padding-top: 8px;
            border-top: 1px dashed rgba(55,65,81,0.8);
        }

        .bn-faq-q {
            font-weight: 600;
            margin-bottom: 3px;
        }

        .bn-faq-a {
            color: var(--bn-muted);
        }

        /* ===== 公告 ===== */
        .bn-news-list {
            list-style: none;
            margin: 8px 0 0;
            padding: 0;
            font-size: 13px;
        }

        .bn-news-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 6px 0;
            border-bottom: 1px dashed rgba(30,64,175,0.5);
        }

        .bn-news-item:last-child {
            border-bottom: none;
        }

        .bn-news-title {
            color: #e5e7eb;
        }

        .bn-news-date {
            font-size: 11px;
            color: var(--bn-muted);
            margin-left: 10px;
            white-space: nowrap;
        }

        /* ===== 侧边栏 ===== */
        .bn-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .bn-card {
            padding: 14px 14px 16px;
            border-radius: 16px;
            background: rgba(15,23,42,0.97);
            border: 1px solid rgba(30,64,175,0.7);
            font-size: 13px;
        }

        .bn-card-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .bn-card-list {
            margin: 6px 0 0;
            padding-left: 18px;
            color: var(--bn-muted);
        }

        .bn-card-list li + li {
            margin-top: 3px;
        }

        .bn-badge-small {
            display: inline-block;
            font-size: 11px;
            padding: 2px 6px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.7);
            color: var(--bn-muted);
            margin-left: 6px;
        }

        .bn-card-img {
            margin-top: 8px;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(55,65,81,0.8);
        }

        /* ===== 底部版权 ===== */
        .bn-footer {
            border-top: 1px solid rgba(30,64,175,0.6);
            padding: 16px 0 22px;
            font-size: 12px;
            color: var(--bn-muted);
            background: radial-gradient(circle at bottom, #020617, #000 65%);
        }

        .bn-footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            align-items: center;
        }

        .bn-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .bn-footer-links a:hover {
            color: #e5e7eb;
        }

        /* ===== 移动端底部悬浮下载栏 ===== */
        .bn-mobile-download-bar {
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 999;
            padding: 8px 14px;
            background: radial-gradient(circle at top, rgba(15,23,42,0.98), rgba(0,0,0,0.98));
            border-top: 1px solid rgba(30,64,175,0.8);
            display: none;
        }

        .bn-mobile-download-inner {
            max-width: 1180px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }

        .bn-mobile-download-text {
            font-size: 12px;
            color: var(--bn-muted);
        }

        .bn-mobile-download-text strong {
            color: #e5e7eb;
        }

        .bn-mobile-download-btns {
            display: flex;
            gap: 8px;
        }

        .bn-mobile-btn {
            padding: 7px 10px;
            border-radius: 999px;
            font-size: 12px;
            border: 1px solid rgba(148,163,184,0.9);
            background: rgba(15,23,42,0.9);
            color: #e5e7eb;
            white-space: nowrap;
        }

        .bn-mobile-btn-primary {
            border-color: transparent;
            background: linear-gradient(to right, #f97316, var(--bn-primary));
            color: #111827;
        }

        @media (max-width: 768px) {
            .bn-header-inner {
                padding-inline: 12px;
            }

            .bn-nav {
                display: none; /* 小屏只保留主CTA，可自行改为汉堡菜单 */
            }

            .bn-main {
                padding-bottom: 104px; /* 预留移动端悬浮栏高度 */
            }

            .bn-mobile-download-bar {
                display: block;
            }
        }