/* roulang page: index */
:root {
            --brand-primary: #d4a347;
            --brand-primary-light: #e8c168;
            --brand-primary-dark: #b8892f;
            --brand-glow: rgba(212, 163, 71, 0.45);
            --brand-glow-soft: rgba(212, 163, 71, 0.18);
            --bg-dark: #0f0c08;
            --bg-darker: #0a0805;
            --bg-panel: #17130d;
            --bg-panel-hover: #1e1812;
            --bg-card: #191510;
            --bg-card-hover: #201a14;
            --text-main: #f2ead9;
            --text-soft: #cabd9f;
            --text-muted: #9a8a6b;
            --text-dim: #6e5f46;
            --border-color: #33291a;
            --border-gold: rgba(212, 163, 71, 0.3);
            --border-gold-strong: rgba(212, 163, 71, 0.55);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 10px 36px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 32px var(--brand-glow);
            --transition-base: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
            --font-serif: 'Georgia', 'STSong', 'SimSun', serif;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --section-space: clamp(64px, 8vw, 110px);
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--brand-primary);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
        }

        :focus-visible {
            outline: 2px solid var(--brand-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* Container */
        .container-custom {
            width: min(var(--container-max), calc(100% - 48px));
            margin-inline: auto;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(12, 9, 5, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(10, 8, 5, 0.97);
            border-bottom-color: var(--border-gold);
        }

        .site-header .navbar {
            padding: 14px 0;
            min-height: 68px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--brand-primary-light) !important;
            letter-spacing: 0.03em;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .navbar-brand:hover {
            color: #f0d98c !important;
            text-shadow: 0 0 18px var(--brand-glow);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
            color: #1a1208;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 16px var(--brand-glow-soft);
        }

        .navbar-nav {
            gap: 6px;
        }

        .navbar-nav .nav-link {
            color: var(--text-soft);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 10px 18px;
            border-radius: 999px;
            position: relative;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(212, 163, 71, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-primary-light);
            background: rgba(212, 163, 71, 0.12);
            text-shadow: 0 0 12px var(--brand-glow);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-primary);
            box-shadow: 0 0 10px var(--brand-glow);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
            color: #1a1208 !important;
            padding: 10px 24px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            border: none;
            transition: var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 4px 20px rgba(212, 163, 71, 0.3);
        }

        .nav-cta:hover {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
            box-shadow: 0 6px 28px rgba(212, 163, 71, 0.45);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid var(--border-gold);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--brand-primary);
            transition: var(--transition-base);
        }

        .navbar-toggler:hover {
            background: rgba(212, 163, 71, 0.1);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--brand-glow-soft);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23d4a347' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='3' y1='6' x2='21' y2='6'/%3E%3Cline x1='3' y1='12' x2='21' y2='12'/%3E%3Cline x1='3' y1='18' x2='21' y2='18'/%3E%3C/svg%3E");
        }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 86vh;
            display: flex;
            align-items: center;
            background: linear-gradient(180deg, rgba(10, 8, 5, 0.65) 0%, rgba(10, 8, 5, 0.75) 40%, rgba(15, 12, 8, 0.95) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: clamp(64px, 8vw, 100px) 0;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 20% 30%, var(--brand-glow-soft) 0%, transparent 55%), radial-gradient(ellipse at 80% 70%, rgba(212, 163, 71, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 64px;
            background: linear-gradient(0deg, var(--bg-dark) 0%, transparent 100%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .hero-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 163, 71, 0.12);
            color: var(--brand-primary-light);
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 600;
            border: 1px solid var(--border-gold);
            backdrop-filter: blur(8px);
            letter-spacing: 0.04em;
        }

        .hero-badge i {
            font-size: 0.9rem;
            color: var(--brand-primary);
        }

        .hero-title {
            font-family: var(--font-serif);
            font-size: clamp(2rem, 4.5vw, 3.4rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 0.03em;
            text-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
        }

        .hero-title .highlight {
            color: var(--brand-primary-light);
            position: relative;
            white-space: nowrap;
        }

        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, transparent, var(--brand-primary), transparent);
            box-shadow: 0 0 12px var(--brand-glow);
        }

        .hero-desc {
            font-size: 1.08rem;
            line-height: 1.9;
            color: var(--text-soft);
            margin-bottom: 32px;
            max-width: 680px;
        }

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

        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
            color: #1a1208;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: 0 6px 28px rgba(212, 163, 71, 0.35);
            letter-spacing: 0.03em;
        }

        .btn-brand:hover {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
            box-shadow: 0 10px 40px rgba(212, 163, 71, 0.5);
            transform: translateY(-2px);
            color: #1a1208;
        }

        .btn-brand:active {
            transform: translateY(0);
            box-shadow: 0 4px 16px rgba(212, 163, 71, 0.3);
        }

        .btn-outline-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--brand-primary-light);
            padding: 14px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 1.5px solid var(--border-gold-strong);
            transition: var(--transition-base);
            letter-spacing: 0.03em;
        }

        .btn-outline-brand:hover {
            background: rgba(212, 163, 71, 0.1);
            border-color: var(--brand-primary);
            color: var(--brand-primary-light);
            box-shadow: 0 0 24px var(--brand-glow-soft);
            transform: translateY(-1px);
        }

        .hero-qualify-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            padding: 16px 22px;
            background: rgba(23, 19, 13, 0.8);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            backdrop-filter: blur(12px);
        }

        .qualify-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-soft);
        }

        .qualify-item i {
            color: var(--brand-primary);
            font-size: 1rem;
        }

        .qualify-divider {
            width: 1px;
            height: 28px;
            background: var(--border-gold);
            flex-shrink: 0;
        }

        /* ========== Section Common ========== */
        .section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .section-dark {
            background: var(--bg-darker);
        }

        .section-panel {
            background: var(--bg-panel);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--brand-primary);
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--brand-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-glow);
        }

        .section-title {
            font-family: var(--font-serif);
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.35;
        }

        .section-desc {
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-soft);
            max-width: 680px;
        }

        .section-desc.text-center {
            margin-inline: auto;
        }

        /* ========== Metrics / 卖点三连 ========== */
        .metrics-row {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: start;
        }

        .metrics-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--brand-primary), transparent);
            opacity: 0;
            transition: var(--transition-base);
        }

        .metric-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .metric-card:hover::before {
            opacity: 1;
        }

        .metric-number {
            font-family: var(--font-serif);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--brand-primary-light);
            line-height: 1.2;
            margin-bottom: 6px;
            text-shadow: 0 0 20px var(--brand-glow-soft);
        }

        .metric-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .metric-sub {
            font-size: 0.78rem;
            color: var(--text-dim);
            margin-top: 4px;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(212, 163, 71, 0.08);
            color: var(--text-soft);
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.82rem;
            border: 1px solid var(--border-gold);
            transition: var(--transition-base);
        }

        .feature-tag:hover {
            background: rgba(212, 163, 71, 0.15);
            border-color: var(--brand-primary);
            color: var(--brand-primary-light);
        }

        .feature-tag i {
            color: var(--brand-primary);
            font-size: 0.85rem;
        }

        /* ========== 场景演示 ========== */
        .scene-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .scene-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .scene-image-wrap img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            transition: var(--transition-slow);
        }

        .scene-image-wrap:hover img {
            transform: scale(1.04);
        }

        .scene-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 8, 5, 0.6) 100%);
            pointer-events: none;
        }

        .scene-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .scene-step {
            display: flex;
            gap: 18px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            position: relative;
        }

        .scene-step:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
            color: #1a1208;
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 16px var(--brand-glow-soft);
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .step-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 社会认同 ========== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition-base);
            position: relative;
        }

        .testimonial-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-sm);
        }

        .testimonial-card .quote-mark {
            font-size: 2.6rem;
            color: var(--brand-primary);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
            font-family: var(--font-serif);
        }

        .testimonial-card p {
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3d2e1a, #5c4325);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-primary-light);
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .author-info .author-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .author-info .author-tag {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .testimonial-stars {
            color: var(--brand-primary);
            font-size: 0.82rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }

        /* ========== 资讯区 ========== */
        .news-layout {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 36px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            gap: 16px;
            align-items: baseline;
            padding: 18px 16px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
            border-radius: 8px;
        }

        .news-item:hover {
            background: rgba(212, 163, 71, 0.05);
            border-bottom-color: var(--border-gold);
            padding-left: 22px;
        }

        .news-date {
            font-size: 0.78rem;
            color: var(--text-dim);
            white-space: nowrap;
            flex-shrink: 0;
            font-weight: 500;
        }

        .news-title-link {
            font-size: 0.95rem;
            color: var(--text-soft);
            font-weight: 500;
            transition: var(--transition-base);
        }

        .news-title-link:hover {
            color: var(--brand-primary-light);
        }

        .news-item:hover .news-title-link {
            color: var(--brand-primary-light);
        }

        .news-recommend {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            height: fit-content;
        }

        .news-recommend .recommend-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .recommend-card {
            margin-bottom: 16px;
            transition: var(--transition-base);
        }

        .recommend-card:last-child {
            margin-bottom: 0;
        }

        .recommend-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            border: 1px solid var(--border-color);
            transition: var(--transition-base);
        }

        .recommend-card:hover img {
            border-color: var(--border-gold);
            transform: scale(1.02);
        }

        .recommend-card .rec-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-soft);
            transition: var(--transition-base);
        }

        .recommend-card:hover .rec-label {
            color: var(--brand-primary-light);
        }

        .recommend-card .rec-desc {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.6;
        }

        /* ========== 结果对比 ========== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 920px;
        }

        .compare-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px 28px;
            transition: var(--transition-base);
            position: relative;
        }

        .compare-card.compare-ours {
            border-color: var(--border-gold-strong);
            background: linear-gradient(135deg, rgba(212, 163, 71, 0.06), var(--bg-card));
            box-shadow: 0 0 32px var(--brand-glow-soft);
        }

        .compare-card:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-sm);
        }

        .compare-card .compare-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .compare-card.compare-ours .compare-tag {
            background: rgba(212, 163, 71, 0.15);
            color: var(--brand-primary-light);
        }

        .compare-card.compare-traditional .compare-tag {
            background: rgba(158, 138, 107, 0.15);
            color: var(--text-muted);
        }

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

        .compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.88rem;
            color: var(--text-soft);
            padding: 8px 0;
            line-height: 1.6;
        }

        .compare-list li i {
            margin-top: 4px;
            flex-shrink: 0;
        }

        .compare-card.compare-ours .compare-list li i {
            color: var(--brand-primary);
        }

        .compare-card.compare-traditional .compare-list li i {
            color: var(--text-dim);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-item:hover {
            border-color: var(--border-gold);
        }

        .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 22px;
            border: none;
            transition: var(--transition-base);
            gap: 12px;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(212, 163, 71, 0.08);
            color: var(--brand-primary-light);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--brand-primary);
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23d4a347' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
            background-size: 20px;
            width: 20px;
            height: 20px;
        }

        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23e8c168' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='18 15 12 9 6 15'/%3E%3C/svg%3E");
        }

        .accordion-body {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.8;
            padding: 0 22px 20px;
            background: transparent;
        }

        /* ========== 转化表单 ========== */
        .form-section {
            position: relative;
            background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-darker) 100%);
        }

        .form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4vw, 48px);
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .form-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, transparent, var(--brand-primary), var(--brand-primary-light), var(--brand-primary), transparent);
            background-size: 200% 100%;
            animation: shimmer-line 3s linear infinite;
        }

        @keyframes shimmer-line {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }

        .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-soft);
            margin-bottom: 6px;
        }

        .form-control,
        .form-select {
            background: var(--bg-darker);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-main);
            padding: 12px 16px;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }

        .form-control:focus,
        .form-select:focus {
            background: var(--bg-darker);
            border-color: var(--brand-primary);
            color: var(--text-main);
            box-shadow: 0 0 0 3px var(--brand-glow-soft);
        }

        .form-control::placeholder {
            color: var(--text-dim);
        }

        .form-select option {
            background: var(--bg-panel);
            color: var(--text-main);
        }

        .form-check-input {
            background-color: var(--bg-darker);
            border-color: var(--border-gold);
        }

        .form-check-input:checked {
            background-color: var(--brand-primary);
            border-color: var(--brand-primary);
        }

        .form-check-label {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .form-hint {
            font-size: 0.78rem;
            color: var(--text-dim);
            margin-top: 6px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }

        .footer-brand {
            font-family: var(--font-serif);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--brand-primary-light);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-soft);
            transition: var(--transition-base);
        }

        .footer-links a:hover {
            color: var(--brand-primary-light);
        }

        .footer-copyright {
            font-size: 0.78rem;
            color: var(--text-dim);
            text-align: center;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid var(--border-color);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(15, 12, 8, 0.98);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
            }

            .navbar-nav .nav-link.active::after {
                display: none;
            }

            .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }

            .metrics-row {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .metrics-cards {
                grid-template-columns: repeat(3, 1fr);
            }

            .scene-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .scene-image-wrap img {
                height: 320px;
            }

            .news-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .compare-grid {
                grid-template-columns: 1fr;
                max-width: 600px;
            }
        }

        @media (max-width: 767.98px) {
            .container-custom {
                width: calc(100% - 32px);
            }

            .hero-section {
                min-height: auto;
                padding: 48px 0 64px;
            }

            .hero-title {
                font-size: 1.7rem;
            }

            .hero-desc {
                font-size: 0.95rem;
            }

            .hero-cta-group {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-brand,
            .btn-outline-brand {
                justify-content: center;
            }

            .hero-qualify-bar {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }

            .qualify-divider {
                display: none;
            }

            .metrics-cards {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .metric-card {
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
                padding: 16px 20px;
            }

            .metric-number {
                font-size: 1.8rem;
                min-width: 80px;
                text-align: center;
            }

            .section-title {
                font-size: 1.45rem;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .news-item {
                flex-direction: column;
                gap: 6px;
                padding: 14px 12px;
            }

            .news-item:hover {
                padding-left: 16px;
            }

            .form-card {
                padding: 24px 18px;
            }

            .footer-links {
                gap: 14px;
                flex-direction: column;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                width: calc(100% - 24px);
            }

            .hero-title {
                font-size: 1.45rem;
            }

            .hero-badge {
                font-size: 0.72rem;
                padding: 6px 12px;
            }

            .hero-badge-group {
                gap: 8px;
            }

            .btn-brand,
            .btn-outline-brand {
                padding: 12px 22px;
                font-size: 0.9rem;
            }

            .section {
                padding: 48px 0;
            }

            .scene-step {
                padding: 14px 16px;
            }

            .scene-image-wrap img {
                height: 240px;
            }

            .compare-card {
                padding: 20px 18px;
            }

            .accordion-button {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
        }

/* 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}