/* roulang page: index */
:root {
            --primary: hsl(215, 45%, 18%);
            --primary-hover: hsl(215, 50%, 14%);
            --accent: hsl(165, 78%, 41%);
            --accent-hover: hsl(165, 85%, 35%);
            --bg-neutral: hsl(210, 20%, 98%);
            --dark-container: hsl(220, 35%, 11%);
            --text-main: hsl(215, 25%, 20%);
            --text-muted: hsl(215, 15%, 50%);
            --text-title: hsl(215, 60%, 10%);
            --border-light: rgba(215, 225, 235, 0.7);
            --card-shadow: 0 10px 30px -10px rgba(15, 30, 60, 0.08);
            --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: #ffffff;
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input {
            font-family: inherit;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部双行导航 */
        .site-header {
            width: 100%;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }

        .top-notice-bar {
            background-color: var(--primary);
            color: #dbeafe;
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .main-nav-bar {
            padding: 16px 0;
        }

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

        .brand-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.02em;
        }

        .brand-logo-badge {
            background-color: var(--accent);
            color: #ffffff;
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

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

        .nav-item-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 4px 0;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 10px 22px;
            border-radius: 8px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition-smooth);
            text-align: center;
        }

        .btn-accent {
            background-color: var(--accent);
            color: #ffffff;
        }

        .btn-accent:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
        }

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

        .btn-outline {
            border-color: var(--border-light);
            background-color: #ffffff;
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 1.05rem;
            border-radius: 10px;
        }

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--primary);
        }

        /* 通用 Section 规范 */
        .section-spacing {
            padding: 88px 0;
        }

        .bg-light-neutral {
            background-color: var(--bg-neutral);
        }

        .bg-dark-container {
            background-color: var(--dark-container);
            color: #f1f5f9;
        }

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            text-transform: uppercase;
            padding: 4px 12px;
            border-radius: 20px;
            background-color: rgba(16, 185, 129, 0.12);
            color: var(--accent);
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }

        .section-title {
            font-size: 2.125rem;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.3;
            margin-bottom: 16px;
        }

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

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

        .section-header-dark .section-desc {
            color: #94a3b8;
        }

        /* 1. Hero 优惠券墙入口（硬性蓝图） */
        .hero-coupon-section {
            background: radial-gradient(circle at top right, rgba(16, 185, 129, 0.08), transparent 50%),
                        linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
            padding: 60px 0 80px;
            position: relative;
            overflow: hidden;
        }

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

        .hero-badge-live {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #ffffff;
            border: 1px solid var(--border-light);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.8125rem;
            color: var(--primary);
            margin-bottom: 20px;
            box-shadow: 0 2px 6px rgba(0,0,0,0.03);
        }

        .hero-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }

        .hero-heading {
            font-size: 2.75rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-title);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero-lead-text {
            font-size: 1.0625rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 32px;
        }

        /* 券面放大组件 */
        .coupon-wall-card {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            border-radius: 18px;
            padding: 32px;
            position: relative;
            box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #ffffff;
        }

        .coupon-wall-card::before, .coupon-wall-card::after {
            content: '';
            position: absolute;
            width: 28px;
            height: 28px;
            background: #ffffff;
            border-radius: 50%;
            top: 55%;
            transform: translateY(-50%);
        }

        .coupon-wall-card::before { left: -14px; }
        .coupon-wall-card::after { right: -14px; }

        .coupon-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
            padding-bottom: 20px;
            margin-bottom: 20px;
        }

        .coupon-discount {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }

        .coupon-discount span {
            font-size: 1rem;
            color: #94a3b8;
            font-weight: normal;
        }

        .coupon-limit-badge {
            background: rgba(16, 185, 129, 0.2);
            border: 1px solid rgba(16, 185, 129, 0.4);
            color: #34d399;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .coupon-items-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 24px;
        }

        .coupon-items-list li {
            font-size: 0.875rem;
            color: #cbd5e1;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .coupon-items-list li::before {
            content: '✓';
            color: var(--accent);
            font-weight: bold;
        }

        /* 2. 品牌故事板块 */
        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .story-image-wrap {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
            aspect-ratio: 16/10;
        }

        .story-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .story-text-content {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .tech-pill-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .tech-pill {
            background: rgba(15, 30, 60, 0.05);
            padding: 6px 14px;
            border-radius: 6px;
            font-size: 0.8125rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* 3. 系列导航板块 */
        .series-nav-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .series-item-box {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 24px;
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .series-item-box:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--card-shadow);
        }

        .series-tag-icon {
            width: 44px;
            height: 44px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.15rem;
        }

        .series-box-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-title);
        }

        .series-box-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 4. 爆款网格 (6张卡片) */
        .grid-cards-six {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 30px;
            transition: var(--transition-smooth);
            position: relative;
        }

        .feature-card:hover {
            border-color: rgba(16, 185, 129, 0.5);
            transform: translateY(-4px);
            box-shadow: 0 14px 28px -10px rgba(15, 30, 60, 0.12);
        }

        .card-num-marker {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 1.25rem;
            font-weight: 800;
            color: rgba(203, 213, 225, 0.6);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 5. 会员权益与对比选型 */
        .tier-cards-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: stretch;
        }

        .tier-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 16px;
            padding: 36px 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            transition: var(--transition-smooth);
        }

        .tier-card.highlighted {
            border-color: var(--accent);
            box-shadow: 0 16px 36px -12px rgba(16, 185, 129, 0.25);
            transform: scale(1.02);
        }

        .tier-recommended-ribbon {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.05em;
        }

        .tier-name {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 8px;
        }

        .tier-subhead {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .tier-spec-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-bottom: 32px;
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
        }

        .tier-spec-list li {
            font-size: 0.875rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .tier-spec-list li::before {
            content: "•";
            color: var(--accent);
            font-weight: bold;
            font-size: 1.2rem;
        }

        /* 6. 资讯与行业深度动态 */
        .news-grid-four {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .news-item-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: var(--transition-smooth);
        }

        .news-item-card:hover {
            border-color: var(--accent);
            box-shadow: var(--card-shadow);
        }

        .news-date-meta {
            font-size: 0.8125rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .news-title-link {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.4;
        }

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

        .news-excerpt {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 7. 保障条规范 */
        .guarantee-bar-flex {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .guarantee-box {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 24px 20px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .guarantee-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-title);
        }

        .guarantee-desc {
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 8. 口碑与评价墙 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 20px;
        }

        .testimonial-stars {
            color: #f59e0b;
            font-size: 0.95rem;
            letter-spacing: 2px;
        }

        .testimonial-quote {
            font-size: 0.9375rem;
            color: var(--text-main);
            line-height: 1.7;
        }

        .testimonial-author-box {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: #e2e8f0;
            object-fit: cover;
        }

        .author-info h4 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--text-title);
        }

        .author-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 9. 进店入口（预约体验与服务网点） */
        .store-portal-box {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: 20px;
            padding: 56px 48px;
            color: #ffffff;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }

        .store-portal-left h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ffffff;
        }

        .store-portal-left p {
            font-size: 1rem;
            color: #94a3b8;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .store-contact-row {
            display: flex;
            gap: 32px;
        }

        .contact-col-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .contact-col-item .lbl {
            font-size: 0.75rem;
            color: #94a3b8;
        }

        .contact-col-item .val {
            font-size: 1.125rem;
            font-weight: 700;
            color: #34d399;
        }

        .store-portal-form {
            background: #ffffff;
            padding: 32px;
            border-radius: 14px;
            color: var(--text-main);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }

        .form-group-item {
            margin-bottom: 16px;
        }

        .form-group-item label {
            display: block;
            font-size: 0.8125rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-title);
        }

        .form-control-input {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            font-size: 0.875rem;
            transition: var(--transition-smooth);
        }

        .form-control-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
        }

        /* 10. 沉浸式技术底座（第5板块在扩展列表中） */
        .tech-engine-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .metric-digits-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .metric-digits-card .num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            font-family: monospace, sans-serif;
        }

The code block defines CSS styles for elements with the class `.metric-digits-card .num`, specifically targeting the display of numerical metrics. The styles include font size, weight, color, line height, and font family to achieve a visual presentation. The location of this code, within the `<style>` tag inside the `<head>` of the HTML document, is noted for context.