/* roulang page: index */
:root {
            --color-bg: #0E1116;
            --color-surface: #161B22;
            --color-surface-2: #1E252F;
            --color-primary: #FF4E3A;
            --color-primary-hover: #FF6B5A;
            --color-primary-soft: rgba(255, 78, 58, 0.12);
            --color-accent: #FFB020;
            --color-text: #F2F4F7;
            --color-text-secondary: #9BA4B0;
            --color-border: rgba(255, 255, 255, 0.08);
            --radius-xs: 8px;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 96px;
            --spacing-section-mobile: 56px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--color-primary);
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
        }

        section {
            position: relative;
        }

        a,
        button {
            outline: none;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== Header / Nav ===== */
        .custom-navbar {
            background: rgba(22, 27, 34, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
            transition: background 0.3s ease;
            z-index: 1050;
        }

        .custom-navbar.scrolled {
            background: rgba(14, 17, 22, 0.98);
        }

        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.45rem;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .custom-navbar .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--color-primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 4px 14px rgba(255, 78, 58, 0.4);
        }

        .custom-navbar .navbar-toggler {
            border: 1px solid var(--color-border);
            color: var(--color-text);
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            background: transparent;
        }

        .custom-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 4px var(--color-primary-soft);
        }

        .custom-navbar .navbar-nav {
            gap: 4px;
        }

        .custom-navbar .nav-link {
            color: var(--color-text-secondary);
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 10px 18px !important;
            border-radius: var(--radius-pill);
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .custom-navbar .nav-link:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }

        .custom-navbar .nav-link.active {
            color: var(--color-primary);
            background: var(--color-primary-soft);
            font-weight: 600;
        }

        .custom-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: var(--radius-pill);
        }

        .btn-nav-cta {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            min-height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
            margin-left: 16px;
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--color-primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 78, 58, 0.45);
        }

        /* ===== Buttons ===== */
        .btn-brand-primary,
        .btn-brand-outline,
        .btn-brand-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
        }

        .btn-brand-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
        }

        .btn-brand-primary:hover {
            background: var(--color-primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 78, 58, 0.45);
        }

        .btn-brand-primary:active {
            transform: translateY(0);
        }

        .btn-brand-outline {
            background: transparent;
            color: var(--color-text);
            border: 1px solid rgba(255, 255, 255, 0.14);
        }

        .btn-brand-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text);
            border-color: rgba(255, 255, 255, 0.28);
            transform: translateY(-2px);
        }

        .btn-brand-accent {
            background: var(--color-accent);
            color: #1a1a1a;
            box-shadow: 0 4px 16px rgba(255, 176, 32, 0.3);
        }

        .btn-brand-accent:hover {
            background: #ffc247;
            color: #1a1a1a;
            transform: translateY(-2px);
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(14, 17, 22, 0.95) 0%, rgba(22, 27, 34, 0.72) 60%, rgba(14, 17, 22, 0.9) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat, var(--color-bg);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -200px;
            left: -100px;
            width: 650px;
            height: 650px;
            background: radial-gradient(circle, rgba(255, 78, 58, 0.13) 0%, transparent 62%);
            filter: blur(50px);
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 176, 32, 0.08) 0%, transparent 60%);
            filter: blur(60px);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary-soft);
            border: 1px solid rgba(255, 78, 58, 0.25);
            color: var(--color-primary-hover);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero-title {
            font-size: clamp(2.25rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: 20px;
        }

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

        .hero-desc {
            font-size: 1.0625rem;
            line-height: 1.75;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
        }

        .hero-trust .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-secondary);
        }

        .hero-trust .trust-item i {
            color: var(--color-accent);
        }

        /* ===== Crowd Funding Card ===== */
        .crowd-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 32px 32px;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            max-width: 460px;
            margin-left: auto;
        }

        .crowd-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
        }

        .crowd-card .card-tagline {
            text-align: center;
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 20px;
        }

        .progress-ring-wrap {
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
        }

        .progress-ring {
            position: relative;
            width: 160px;
            height: 160px;
        }

        .progress-ring svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }

        .progress-ring .ring-track {
            fill: none;
            stroke: rgba(255, 255, 255, 0.06);
            stroke-width: 10;
        }

        .progress-ring .ring-fill {
            fill: none;
            stroke: var(--color-primary);
            stroke-width: 10;
            stroke-linecap: round;
            stroke-dasharray: 528;
            stroke-dashoffset: 74;
            transition: stroke-dashoffset 1s ease;
            filter: drop-shadow(0 0 6px rgba(255, 78, 58, 0.5));
        }

        .progress-ring .ring-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }

        .ring-text strong {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text);
            display: block;
            line-height: 1.2;
        }

        .ring-text span {
            font-size: 0.75rem;
            color: var(--color-text-secondary);
        }

        .crowd-info {
            text-align: center;
            margin-bottom: 24px;
        }

        .crowd-info h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .crowd-info p {
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            margin-bottom: 0;
        }

        .tier-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
        }

        .tier-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            transition: border-color 0.2s ease;
        }

        .tier-row:hover {
            border-color: rgba(255, 78, 58, 0.3);
        }

        .tier-row .tier-name {
            font-weight: 600;
            font-size: 0.9375rem;
        }

        .tier-row .tier-price {
            color: var(--color-accent);
            font-weight: 700;
            font-size: 0.9375rem;
        }

        .tier-row .tier-tag {
            font-size: 0.75rem;
            background: var(--color-primary-soft);
            color: var(--color-primary-hover);
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }

        .btn-support {
            width: 100%;
            min-height: 48px;
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
        }

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

        /* ===== Section headings ===== */
        .section-heading {
            margin-bottom: 48px;
        }

        .section-heading .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-soft);
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .section-heading h2 {
            font-size: clamp(1.75rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-heading p {
            color: var(--color-text-secondary);
            font-size: 1rem;
            max-width: 640px;
            margin: 0;
        }

        .section-heading.center {
            text-align: center;
        }

        .section-heading.center p {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== News Section ===== */
        .news-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg);
        }

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

        .news-list li {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--color-border);
            transition: background 0.2s ease;
        }

        .news-list li:last-child {
            border-bottom: none;
        }

        .news-list .news-date {
            flex-shrink: 0;
            min-width: 96px;
            text-align: center;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            font-weight: 500;
            line-height: 1.4;
        }

        .news-list .news-date strong {
            display: block;
            font-size: 1.0625rem;
            color: var(--color-text);
            font-weight: 700;
        }

        .news-list .news-link {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.5;
            transition: color 0.2s ease;
        }

        .news-list .news-link:hover {
            color: var(--color-primary);
        }

        .news-list .news-desc {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            margin-top: 4px;
        }

        .sidebar-wrap {
            padding-left: 32px;
        }

        .sidebar-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            margin-bottom: 24px;
        }

        .sidebar-card h4 {
            font-size: 1.0625rem;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h4 i {
            color: var(--color-primary);
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 0.9375rem;
            font-weight: 500;
            transition: color 0.2s ease;
        }

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

        .hot-item .hot-number {
            width: 26px;
            height: 26px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-text-secondary);
        }

        .hot-item:nth-child(2) .hot-number {
            background: var(--color-primary-soft);
            color: var(--color-primary);
        }

        .hot-item:hover {
            color: var(--color-primary);
            cursor: pointer;
        }

        .subscribe-form input {
            width: 100%;
            height: 46px;
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 0 16px;
            color: var(--color-text);
            font-size: 0.9375rem;
            margin-bottom: 12px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .subscribe-form input:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px var(--color-primary-soft);
        }

        .subscribe-form input::placeholder {
            color: var(--color-text-secondary);
        }

        .subscribe-form .btn-subscribe {
            width: 100%;
            height: 46px;
            background: var(--color-primary);
            border: none;
            border-radius: var(--radius-sm);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            transition: all 0.25s ease;
            cursor: pointer;
        }

        .subscribe-form .btn-subscribe:hover {
            background: var(--color-primary-hover);
            transform: translateY(-2px);
        }

        .subscribe-note {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            margin-top: 10px;
        }

        /* ===== Feature Cards ===== */
        .feature-section {
            padding: var(--spacing-section) 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .feature-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 78, 58, 0.3);
        }

        .feature-card:nth-child(2)::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), transparent);
        }

        .feature-card:nth-child(3)::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -40px;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(255, 176, 32, 0.08);
            pointer-events: none;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--color-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--color-primary);
            margin-bottom: 22px;
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(255, 176, 32, 0.14);
            color: var(--color-accent);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-text);
        }

        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 0.9375rem;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .feature-card .step-num {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 0.875rem;
            font-weight: 800;
            color: var(--color-border);
            letter-spacing: 0.05em;
        }

        /* ===== App / Scene Section ===== */
        .app-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg);
            overflow: hidden;
        }

        .app-devices {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-bottom: 48px;
        }

        .device-chip {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-pill);
            padding: 10px 24px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.25s ease;
        }

        .device-chip i {
            color: var(--color-primary);
        }

        .device-chip:hover {
            border-color: rgba(255, 78, 58, 0.3);
            color: var(--color-text);
            transform: translateY(-2px);
        }

        .app-showcase {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            align-items: center;
        }

        .app-image-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .app-image-wrap img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
            transition: transform 0.4s ease;
        }

        .app-image-wrap:hover img {
            transform: scale(1.02);
        }

        .app-image-wrap .img-float-label {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(14, 17, 22, 0.85);
            backdrop-filter: blur(8px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            font-size: 0.8125rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .app-image-wrap .img-float-label i {
            color: var(--color-accent);
        }

        .app-points {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .app-point {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .app-point .point-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: 12px;
            background: var(--color-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1rem;
        }

        .app-point h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .app-point p {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }

        /* ===== Social Proof ===== */
        .proof-section {
            padding: var(--spacing-section) 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .proof-stats {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 32px;
        }

        .stat-block {
            text-align: left;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--color-border);
        }

        .stat-block:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .stat-value {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }

        .stat-label {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            margin-top: 4px;
        }

        .review-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            margin-bottom: 20px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .review-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .review-stars {
            color: var(--color-accent);
            font-size: 0.875rem;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }

        .review-text {
            font-size: 0.9375rem;
            line-height: 1.75;
            color: var(--color-text);
            margin-bottom: 18px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-user .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .review-user .user-name {
            font-size: 0.9375rem;
            font-weight: 600;
        }

        .review-user .user-role {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg);
        }

        .faq-accordion .accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(255, 78, 58, 0.35);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--color-text);
            font-size: 1rem;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
            gap: 12px;
        }

        .faq-accordion .accordion-button::after {
            background: none;
            content: '\f067';
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.875rem;
            color: var(--color-primary);
            width: auto;
            height: auto;
            transition: transform 0.3s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--color-primary);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--color-primary);
            background: var(--color-primary-soft);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 4px var(--color-primary-soft);
        }

        .faq-accordion .accordion-body {
            padding: 8px 24px 24px;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
            line-height: 1.75;
            background: transparent;
        }

        /* ===== About Section ===== */
        .about-section {
            padding: var(--spacing-section) 0;
            background: linear-gradient(135deg, rgba(14, 17, 22, 0.92) 0%, rgba(14, 17, 22, 0.85) 100%), url('/assets/images/backpic/back-3.jpg') center/cover no-repeat, var(--color-bg);
            border-top: 1px solid var(--color-border);
            position: relative;
        }

        .about-inner {
            max-width: 760px;
            margin: 0 auto;
            text-align: center;
        }

        .about-inner h2 {
            font-size: clamp(1.75rem, 3vw, 2.25rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .about-inner p {
            font-size: 1rem;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .about-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 28px;
        }

        .about-tag {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-pill);
            padding: 8px 18px;
            font-size: 0.875rem;
            color: var(--color-text);
            font-weight: 500;
        }

        .about-tag i {
            color: var(--color-accent);
            margin-right: 6px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--color-border);
            padding: 64px 0 0;
        }

        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
            color: var(--color-text);
        }

        .footer-brand .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.875rem;
            color: #fff;
        }

        .footer-brand p {
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            line-height: 1.7;
            max-width: 300px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            transition: all 0.2s ease;
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--color-text);
        }

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

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--color-text-secondary);
            font-size: 0.875rem;
            margin-bottom: 14px;
        }

        .footer-contact li i {
            color: var(--color-accent);
            margin-top: 5px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            margin-top: 48px;
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            margin: 0;
        }

        .footer-bottom a {
            color: var(--color-text-secondary);
        }

        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* ===== Sticky Bottom Bar ===== */
        .sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(22, 27, 34, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--color-border);
            padding: 12px 24px;
            min-height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            transform: translateY(0);
            transition: transform 0.3s ease;
        }

        .sticky-bar.hidden {
            transform: translateY(100%);
        }

        .sticky-bar .sticky-text {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            white-space: nowrap;
        }

        .sticky-bar .sticky-text i {
            color: var(--color-primary);
            margin-right: 6px;
        }

        .sticky-bar .btn-sticky {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.9375rem;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
        }

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

        body {
            padding-bottom: 64px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .sidebar-wrap {
                padding-left: 0;
                margin-top: 32px;
            }

            .app-showcase {
                grid-template-columns: 1fr;
            }

            .crowd-card {
                margin: 48px auto 0;
            }

            .hero-section {
                padding: 90px 0 70px;
            }

            .custom-navbar .navbar-collapse {
                background: var(--color-surface);
                border-radius: var(--radius-sm);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--color-border);
                box-shadow: var(--shadow-card);
            }

            .custom-navbar .navbar-nav {
                gap: 4px;
                margin-bottom: 12px;
            }

            .custom-navbar .btn-nav-cta {
                margin-left: 0;
                width: 100%;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --spacing-section: var(--spacing-section-mobile);
            }

            .hero-title {
                font-size: clamp(1.85rem, 6vw, 2.4rem);
            }

            .hero-desc {
                font-size: 0.9375rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn-brand-primary,
            .hero-actions .btn-brand-outline {
                width: 100%;
            }

            .hero-trust {
                gap: 14px;
            }

            .hero-trust .trust-item {
                font-size: 0.8125rem;
            }

            .news-list li {
                flex-direction: column;
                gap: 10px;
            }

            .news-list .news-date {
                min-width: auto;
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 5px 12px;
            }

            .news-list .news-date strong {
                display: inline;
                font-size: 0.875rem;
            }

            .feature-card {
                margin-bottom: 16px;
            }

            .proof-stats {
                margin-bottom: 32px;
            }

            .sticky-bar {
                padding: 10px 16px;
                min-height: 56px;
                gap: 14px;
            }

            .sticky-bar .sticky-text {
                font-size: 0.875rem;
            }

            .sticky-bar .btn-sticky {
                min-height: 40px;
                padding: 0 20px;
                font-size: 0.875rem;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer-col {
                margin-bottom: 32px;
            }

            .section-heading {
                margin-bottom: 32px;
            }

            .stat-value {
                font-size: 1.75rem;
            }
        }

        @media (max-width: 575.98px) {
            .sticky-bar {
                justify-content: space-between;
            }

            .sticky-bar .sticky-text {
                font-size: 0.8125rem;
            }

            .sticky-bar .btn-sticky {
                min-height: 44px;
                padding: 0 18px;
                font-size: 0.875rem;
            }
        }

/* roulang page: category1 */
:root {
  --color-bg: #0E1116;
  --color-surface: #161B22;
  --color-surface-2: #1E252F;
  --color-primary: #FF4E3A;
  --color-primary-hover: #FF6B5A;
  --color-primary-soft: rgba(255, 78, 58, 0.12);
  --color-accent: #FFB020;
  --color-text: #F2F4F7;
  --color-text-secondary: #9BA4B0;
  --color-border: rgba(255, 255, 255, 0.08);
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5);
  --spacing-section: 96px;
  --spacing-section-mobile: 56px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px;
}

* { box-sizing: border-box; }

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--color-primary); }

button, input { font-family: inherit; }

.container { max-width: 1200px; }

section { position: relative; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== Header / Nav ===== */
.custom-navbar {
  background: rgba(22, 27, 34, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  min-height: 72px;
  padding-top: 0;
  padding-bottom: 0;
  transition: background 0.3s ease;
  z-index: 1050;
}
.custom-navbar.scrolled { background: rgba(14, 17, 22, 0.98); }
.custom-navbar .navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.custom-navbar .navbar-brand .brand-icon {
  width: 38px;
  height: 38px;
  background: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(255, 78, 58, 0.4);
}
.custom-navbar .navbar-toggler {
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  background: transparent;
}
.custom-navbar .navbar-toggler:focus { box-shadow: 0 0 0 4px var(--color-primary-soft); }
.custom-navbar .navbar-nav { gap: 4px; }
.custom-navbar .nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 10px 18px !important;
  border-radius: var(--radius-pill);
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}
.custom-navbar .nav-link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}
.custom-navbar .nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 600;
}
.custom-navbar .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
}
.btn-nav-cta {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9375rem;
  min-height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
  margin-left: 16px;
  white-space: nowrap;
}
.btn-nav-cta:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 78, 58, 0.45);
}

/* ===== Buttons ===== */
.btn-brand-primary,
.btn-brand-outline,
.btn-brand-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
}
.btn-brand-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 78, 58, 0.35);
}
.btn-brand-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 78, 58, 0.45);
}
.btn-brand-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.btn-brand-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  transform: translateY(-2px);
}
.btn-brand-accent {
  background: var(--color-accent);
  color: #0a0c10;
  box-shadow: 0 4px 16px rgba(255, 176, 32, 0.35);
}
.btn-brand-accent:hover {
  background: #ffc247;
  color: #0a0c10;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 176, 32, 0.45);
}

/* ===== Page Hero / Breadcrumb ===== */
.page-hero {
  padding: 140px 0 72px;
  background: linear-gradient(135deg, rgba(14, 17, 22, 0.95), rgba(14, 17, 22, 0.88)), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-primary-soft), transparent 70%);
  border-radius: 50%;
}
.page-hero .breadcrumb-wrap {
  margin-bottom: 20px;
}
.page-hero .breadcrumb {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  display: inline-flex;
  align-items: center;
  backdrop-filter: blur(8px);
}
.page-hero .breadcrumb-item {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.page-hero .breadcrumb-item a:hover { color: var(--color-primary); }
.page-hero .breadcrumb-item.active { color: var(--color-primary); }
.page-hero .breadcrumb-item + .breadcrumb-item::before {
  content: '›';
  color: var(--color-text-secondary);
  padding: 0 8px;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}
.page-hero h1 .text-gradient {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero .lead-desc {
  max-width: 680px;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.page-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
  z-index: 1;
}
.page-hero .hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  position: relative;
  z-index: 1;
}
.page-hero .hero-stats .stat-item .stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}
.page-hero .hero-stats .stat-item .stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ===== Filter Tags ===== */
.filter-bar {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.filter-bar .filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-bar .filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
}
.filter-bar .filter-tag:hover {
  color: var(--color-text);
  border-color: rgba(255, 78, 58, 0.3);
  background: var(--color-surface-2);
}
.filter-bar .filter-tag.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 78, 58, 0.35);
}
.filter-result-info {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.filter-result-info i { color: var(--color-primary); }

/* ===== Content Cards Grid ===== */
.content-section {
  padding: 64px 0 80px;
}
.content-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 78, 58, 0.3);
}
.content-card .card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.content-card .card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.content-card:hover .card-thumb img { transform: scale(1.05); }
.content-card .card-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(14, 17, 22, 0.4), transparent 60%);
  pointer-events: none;
}
.content-card .card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(255, 78, 58, 0.4);
}
.content-card .card-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 52px;
  height: 52px;
  background: rgba(14, 17, 22, 0.75);
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 2;
  backdrop-filter: blur(4px);
}
.content-card:hover .card-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.content-card .card-body-info {
  padding: 22px 22px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.content-card .card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}
.content-card .card-title a:hover { color: var(--color-primary); }
.content-card .card-summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.content-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.content-card .card-tags .tag {
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.content-card .card-tags .tag.highlight {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: transparent;
}
.content-card .card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}
.content-card .card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.content-card .card-meta i { color: var(--color-accent); }
.content-card .card-meta .meta-rating i { color: var(--color-accent); }

/* ===== Sidebar ===== */
.sidebar-widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px;
  margin-bottom: 24px;
}
.sidebar-widget .widget-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}
.sidebar-widget .widget-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
}
.sidebar-widget .hot-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-widget .hot-list .hot-item {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}
.sidebar-widget .hot-list .hot-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-widget .hot-list .hot-rank {
  width: 30px;
  height: 30px;
  background: var(--color-surface-2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.sidebar-widget .hot-list .hot-rank.top-1 { background: var(--color-primary); color: #fff; }
.sidebar-widget .hot-list .hot-rank.top-2 { background: var(--color-accent); color: #0a0c10; }
.sidebar-widget .hot-list .hot-rank.top-3 { background: var(--color-surface-2); color: var(--color-accent); border: 1px solid rgba(255, 176, 32, 0.3); }
.sidebar-widget .hot-list .hot-item .hot-info { flex: 1; min-width: 0; }
.sidebar-widget .hot-list .hot-item .hot-info .hot-name {
  font-size: 0.9375rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.sidebar-widget .hot-list .hot-item .hot-info .hot-name a:hover { color: var(--color-primary); }
.sidebar-widget .hot-list .hot-item .hot-info .hot-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}
.sidebar-widget .cat-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-widget .cat-list li {
  margin-bottom: 4px;
}
.sidebar-widget .cat-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}
.sidebar-widget .cat-list a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.sidebar-widget .cat-list a .cat-count {
  font-size: 0.75rem;
  background: var(--color-surface-2);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
}
.sidebar-widget .cat-list a:hover .cat-count {
  background: var(--color-primary);
  color: #fff;
}
.sidebar-widget .subscribe-card {
  text-align: center;
}
.sidebar-widget .subscribe-card p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: 18px;
}
.sidebar-widget .subscribe-card .form-control {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  height: 46px;
  padding: 0 16px;
  color: var(--color-text);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}
.sidebar-widget .subscribe-card .form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
  background: var(--color-surface-2);
  color: var(--color-text);
}
.sidebar-widget .subscribe-card .form-control::placeholder { color: var(--color-text-secondary); }
.sidebar-widget .subscribe-card .btn-submit {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  border: none;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.sidebar-widget .subscribe-card .btn-submit:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 78, 58, 0.4);
}
.sidebar-widget .subscribe-card .subscribe-note {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 10px;
}

/* ===== Pagination ===== */
.pagination-section {
  padding: 24px 0 56px;
}
.pagination-custom {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.pagination-custom a,
.pagination-custom span {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.pagination-custom a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  border-color: var(--color-border);
}
.pagination-custom .page-current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 78, 58, 0.35);
}
.pagination-custom .page-arrow {
  width: auto;
  padding: 0 16px;
  gap: 6px;
}
.pagination-custom .page-dots {
  border: none;
  color: var(--color-text-secondary);
}

/* ===== Advantages ===== */
.advantages-section {
  padding: 80px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.section-heading {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-heading h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-heading p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}
.advantage-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.advantage-card:nth-child(2)::before { background: var(--color-accent); }
.advantage-card:nth-child(3)::before { background: var(--color-primary); }
.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 78, 58, 0.25);
}
.advantage-card:hover::before { opacity: 1; }
.advantage-card .advantage-icon {
  width: 52px;
  height: 52px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 20px;
}
.advantage-card:nth-child(2) .advantage-icon {
  background: rgba(255, 176, 32, 0.12);
  color: var(--color-accent);
}
.advantage-card:nth-child(3) .advantage-icon {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.advantage-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.advantage-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== Scenarios ===== */
.scenarios-section {
  padding: 80px 0;
  background: var(--color-bg);
}
.scenario-row {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 64px;
}
.scenario-row:last-child { margin-bottom: 0; }
.scenario-row.reverse {
  flex-direction: row-reverse;
}
.scenario-media {
  flex: 0 0 48%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  position: relative;
}
.scenario-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.scenario-media .scenario-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(14, 17, 22, 0.8);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 176, 32, 0.3);
}
.scenario-content {
  flex: 1;
}
.scenario-content .num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}
.scenario-content h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.scenario-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.scenario-content .scenario-points {
  list-style: none;
  padding: 0;
  margin: 0;
}
.scenario-content .scenario-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-text);
  font-size: 0.9375rem;
  margin-bottom: 8px;
}
.scenario-content .scenario-points li i {
  color: var(--color-primary);
  margin-top: 4px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.faq-wrapper {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(255, 78, 58, 0.2);
}
.faq-item .faq-title {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  transition: color 0.2s ease;
}
.faq-item .faq-title .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
.faq-item .faq-title:hover { color: var(--color-primary); }
.faq-item .faq-title[aria-expanded="true"] { color: var(--color-primary); }
.faq-item .faq-title[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.faq-item .faq-body {
  padding: 0 24px 20px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 76px 0;
  background: linear-gradient(135deg, rgba(255, 78, 58, 0.15), transparent 60%), var(--color-bg);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--color-primary-soft), transparent 70%);
  border-radius: 50%;
}
.cta-banner .cta-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-banner h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-banner p {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  margin-bottom: 28px;
}
.cta-banner .cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: #0A0C10;
  border-top: 1px solid var(--color-border);
  padding-top: 64px;
  padding-bottom: 24px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-text);
}
.footer-brand .footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 78, 58, 0.35);
}
.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}
.footer-social a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.footer-col h5 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--color-text);
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col ul a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}
.footer-col .footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}
.footer-col .footer-contact li i {
  color: var(--color-primary);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
  padding-top: 20px;
}
.footer-bottom p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}
.footer-bottom a {
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  margin-left: 18px;
}
.footer-bottom a:hover { color: var(--color-primary); }

/* ===== Sticky Bottom Bar ===== */
.sticky-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1020;
  background: rgba(22, 27, 34, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  padding: 10px 0;
}
.sticky-bottom-bar .bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.sticky-bottom-bar .bar-text {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-bottom-bar .bar-text i {
  color: var(--color-primary);
  margin-right: 6px;
}
.sticky-bottom-bar .bar-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  min-height: 40px;
  padding: 0 24px;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease;
}
.sticky-bottom-bar .bar-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .page-hero { padding: 120px 0 56px; }
  .scenario-row, .scenario-row.reverse {
    flex-direction: column;
    gap: 32px;
  }
  .scenario-media { flex: 0 0 100%; }
  .sidebar-widget { margin-top: 32px; }
  .navbar-collapse {
    background: var(--color-surface);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    margin-top: 8px;
  }
  .btn-nav-cta {
    margin-left: 0;
    width: 100%;
    margin-top: 12px;
  }
}

@media (max-width: 767px) {
  .page-hero { padding: 100px 0 40px; }
  .page-hero h1 { font-size: 1.75rem; }
  .page-hero .hero-stats { gap: 20px; flex-wrap: wrap; }
  .page-hero .hero-stats .stat-item .stat-num { font-size: 1.25rem; }
  .content-section { padding: 40px 0 56px; }
  .filter-result-info { margin-top: 16px; }
  .scenarios-section { padding: 56px 0; }
  .faq-section { padding: 56px 0; }
  .cta-banner { padding: 56px 0; }
  .sticky-bottom-bar .bar-text { font-size: 0.8125rem; }
  .sticky-bottom-bar .bar-cta { min-height: 36px; padding: 0 16px; font-size: 0.8125rem; }
  .pagination-custom a, .pagination-custom span { width: 36px; height: 36px; }
  .footer-bottom .text-md-end { margin-top: 10px; }
  .footer-bottom a { margin-left: 0; margin-right: 16px; }
}

@media (max-width: 575px) {
  .btn-brand-primary, .btn-brand-outline, .btn-brand-accent {
    min-height: 44px;
    width: 100%;
    padding: 0 20px;
  }
  .page-hero .hero-actions { flex-direction: column; }
  .filter-bar .filter-tags { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .filter-bar .filter-tag { flex-shrink: 0; }
  .sticky-bottom-bar { padding: 8px 0; }
  .sticky-bottom-bar .bar-text { max-width: 55%; }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}