/* roulang page: index */
:root {
            --primary: #3A7DBF;
            --primary-hover: #2E6AA8;
            --primary-light: #E8F0F8;
            --tea-green: #DCE8D5;
            --warm-beige: #F5F1E8;
            --bg-white: #FFFFFF;
            --bg-light: #F4F7FA;
            --text-dark: #1C2833;
            --text-body: #5A6B7A;
            --text-muted: #8898A5;
            --border-color: #E0E6EC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.1), 0 12px 32px rgba(0,0,0,0.08);
            --transition: all 0.25s ease;
            --spacing-section: 72px;
            --spacing-section-mobile: 44px;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-size-h1: 38px;
            --font-size-h2: 26px;
            --font-size-h3: 18px;
            --font-size-body: 15.5px;
            --font-size-sm: 13px;
            --header-height: 64px;
        }
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-base);
            font-size: var(--font-size-body);
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-hover); }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(58,125,191,0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-base);
            color: var(--text-dark);
            margin: 0 0 12px;
            line-height: 1.35;
            font-weight: 700;
        }
        h1 { font-size: var(--font-size-h1); letter-spacing: -0.01em; }
        h2 { font-size: var(--font-size-h2); }
        h3 { font-size: var(--font-size-h3); }
        p { margin: 0 0 12px; }
        ul, ol { margin: 0 0 16px; padding-left: 20px; }
        section { padding: var(--spacing-section) 0; }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-alt { background: var(--bg-light); }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
            line-height: 1.75;
        }
        .section-heading {
            margin-bottom: 16px;
        }
        .section-heading .kicker {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            min-height: 48px;
            text-align: center;
            line-height: 1.4;
            font-family: var(--font-base);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(58,125,191,0.3); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.25);
        }
        .btn-outline:active { transform: translateY(0); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .nav-container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--header-height);
        }
        .brand-logo {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo span { color: var(--primary); }
        .brand-logo i { color: var(--primary); font-size: 20px; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-body);
            font-size: 14.5px;
            font-weight: 500;
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover { color: var(--primary); border-bottom-color: var(--primary); }
        .nav-links a.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
        .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 18px !important;
            border-radius: 6px;
            border-bottom: none !important;
            font-weight: 600;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff !important;
            border-bottom: none !important;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 98;
        }
        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: -280px;
            width: 260px;
            height: 100%;
            background: #fff;
            z-index: 99;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: right 0.3s ease;
            box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        }
        .mobile-nav-panel.open { right: 0; }
        .mobile-nav-panel a {
            color: var(--text-body);
            font-size: 15px;
            padding: 10px 4px;
            border-bottom: 1px solid var(--border-color);
            font-weight: 500;
        }
        .mobile-nav-panel a:hover { color: var(--primary); }
        .mobile-nav-panel .close-btn {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            cursor: pointer;
            align-self: flex-end;
            padding: 4px 8px;
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 0;
            background: var(--bg-light);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: var(--tea-green);
            opacity: 0.5;
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: var(--warm-beige);
            opacity: 0.7;
            z-index: 1;
        }
        .hero-inner {
            max-width: 1180px;
            margin: 0 auto;
            padding: 64px 24px 56px;
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 2;
            min-height: 520px;
        }
        .hero-content { flex: 1 1 55%; }
        .hero-content h1 {
            font-size: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.015em;
        }
        .hero-content .hero-tag {
            display: inline-block;
            background: var(--warm-beige);
            color: var(--text-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid #E8DFCE;
        }
        .hero-subtitle {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 24px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .hero-trust-bar {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .hero-trust-bar i { color: var(--primary); margin-right: 4px; }
        .hero-visual {
            flex: 1 1 45%;
            position: relative;
            min-height: 360px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }
        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
            border-radius: var(--radius-lg);
        }
        .hero-visual .hero-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(28,40,51,0.82);
            color: #fff;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        /* ===== Feature Cards (Asymmetric) ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.9fr;
            gap: 24px;
        }
        .feature-grid .feature-card:first-child {
            grid-row: span 2;
        }
        .feature-grid.non-standard {
            grid-template-columns: 1fr 1fr;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.03);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .feature-card .num {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            margin-bottom: 10px;
            display: block;
        }
        .feature-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .feature-card p {
            margin: 0;
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.75;
        }
        .feature-card .icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }

        /* ===== Scene Grid ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .scene-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .scene-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .scene-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .scene-card:hover img { transform: scale(1.04); }
        .scene-card .scene-caption {
            padding: 16px 20px;
            font-size: 14px;
            color: var(--text-body);
            font-weight: 500;
        }
        .scene-card .scene-caption i { color: var(--primary); margin-right: 6px; }

        /* ===== Testimonials ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            position: relative;
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .testimonial-card .quote-mark {
            font-size: 44px;
            color: var(--tea-green);
            line-height: 1;
            position: absolute;
            top: 16px;
            right: 20px;
            font-family: Georgia, serif;
            opacity: 0.7;
        }
        .testimonial-stars { color: #F0B429; font-size: 14px; margin-bottom: 8px; letter-spacing: 1px; }
        .testimonial-card p {
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .testimonial-user .avatar {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }

        /* ===== Comparison Table ===== */
        .comparison-wrapper {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.04);
        }
        .comparison-table { width: 100%; border-collapse: collapse; }
        .comparison-table th, .comparison-table td {
            padding: 16px 22px;
            text-align: left;
            font-size: 14.5px;
            border-bottom: 1px solid var(--border-color);
        }
        .comparison-table th {
            background: var(--bg-light);
            font-weight: 700;
            color: var(--text-dark);
            font-size: 15px;
        }
        .comparison-table td:first-child { font-weight: 600; color: var(--text-dark); width: 120px; }
        .comparison-table i.fa-check { color: var(--primary); }
        .comparison-table i.fa-minus { color: var(--text-muted); }

        /* ===== News List ===== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover img { transform: scale(1.03); }
        .news-card-body { padding: 18px 20px 20px; }
        .news-card-body h3 {
            font-size: 16px;
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .news-card-body .news-excerpt {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 10px;
        }
        .news-meta {
            font-size: 12.5px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .news-meta i { color: var(--primary); }

        /* ===== FAQ Accordion ===== */
        .faq-section .accordion {
            background: transparent;
            border: none;
        }
        .faq-section .accordion-item {
            background: #fff;
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0,0,0,0.03);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-section .accordion-item:hover { box-shadow: var(--shadow-card-hover); }
        .faq-section .accordion-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-section .accordion-title .q-icon {
            color: var(--primary);
            font-weight: 700;
            margin-right: 10px;
            font-size: 16px;
        }
        .faq-section .accordion-title .toggle-icon {
            color: var(--text-muted);
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        .faq-section .accordion-item.is-active .toggle-icon { transform: rotate(180deg); }
        .faq-section .accordion-content {
            padding: 0 22px 18px;
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.75;
        }

        /* ===== Guarantee Bar ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 16px 18px;
            box-shadow: var(--shadow-card);
            font-size: 14px;
            color: var(--text-dark);
            font-weight: 500;
        }
        .guarantee-item i {
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        /* ===== Bottom Fixed CTA ===== */
        .bottom-cta {
            background: var(--text-dark);
            color: #fff;
            padding: 18px 0;
            border-radius: var(--radius-md);
            margin: 20px 0 0;
        }
        .bottom-cta-inner {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .bottom-cta-inner .cta-text {
            font-size: 15.5px;
            font-weight: 500;
        }
        .bottom-cta-inner .cta-text strong { color: #fff; }
        .bottom-cta-inner .btn {
            background: #fff;
            color: var(--text-dark);
            border: none;
            min-height: 42px;
            padding: 9px 22px;
        }
        .bottom-cta-inner .btn:hover {
            background: var(--primary-light);
            color: var(--text-dark);
            transform: translateY(-2px);
        }
        .bottom-cta-fixed {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(28,40,51,0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            padding: 10px 0;
            box-shadow: 0 -2px 16px rgba(0,0,0,0.12);
        }
        .bottom-cta-fixed .bottom-cta-inner .cta-text { font-size: 13.5px; }

        /* ===== Tea Master Slider ===== */
        .master-scroll {
            display: flex;
            gap: 18px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding-bottom: 12px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) var(--bg-light);
        }
        .master-scroll::-webkit-scrollbar { height: 6px; }
        .master-scroll::-webkit-scrollbar-track { background: var(--bg-light); border-radius: 3px; }
        .master-scroll::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
        .master-card {
            scroll-snap-align: start;
            flex: 0 0 260px;
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .master-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .master-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .master-card-body { padding: 18px 20px 20px; }
        .master-card-body h3 { font-size: 16.5px; margin-bottom: 4px; }
        .master-card-body .master-tag {
            display: inline-block;
            background: var(--tea-green);
            color: var(--text-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 14px;
            margin-bottom: 8px;
        }
        .master-card-body p { font-size: 13.5px; color: var(--text-muted); margin: 0; line-height: 1.65; }

        /* ===== Gallery Grid ===== */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }
        .gallery-grid img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            cursor: pointer;
        }
        .gallery-grid img:hover {
            box-shadow: var(--shadow-card-hover);
            transform: scale(1.03);
        }

        /* ===== Recommendation Cards ===== */
        .reco-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .reco-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
        }
        .reco-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .reco-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .reco-card:hover img { transform: scale(1.04); }
        .reco-card-body { padding: 16px 20px 20px; }
        .reco-card-body h3 { font-size: 15.5px; margin-bottom: 6px; }
        .reco-card-body p { font-size: 13px; color: var(--text-muted); margin: 0; line-height: 1.6; }
        .reco-rank {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 14px;
            letter-spacing: 0.02em;
        }
        .reco-tag {
            display: inline-block;
            background: var(--warm-beige);
            color: var(--text-dark);
            font-size: 11.5px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 10px;
            margin-right: 4px;
            margin-bottom: 4px;
        }

        /* ===== Brand Trust ===== */
        .brand-trust {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }
        .brand-trust-text { flex: 1 1 55%; }
        .brand-trust-text p { margin-bottom: 12px; }
        .brand-stats {
            flex: 1 1 40%;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .brand-stat-item {
            text-align: center;
            padding: 16px 10px;
            background: var(--bg-light);
            border-radius: var(--radius-md);
        }
        .brand-stat-item .stat-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }
        .brand-stat-item .stat-label {
            font-size: 12.5px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== Contact Form ===== */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 32px;
            align-items: start;
        }
        .contact-info-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .contact-info-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 14.5px;
            color: var(--text-body);
        }
        .contact-info-list li:last-child { border-bottom: none; }
        .contact-info-list i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
            width: 22px;
            text-align: center;
            flex-shrink: 0;
        }
        .contact-form {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0,0,0,0.04);
        }
        .form-group { margin-bottom: 16px; }
        .form-group label {
            display: block;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 11px 14px;
            font-size: 14.5px;
            font-family: var(--font-base);
            color: var(--text-dark);
            background: #fff;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
            -webkit-appearance: none;
            appearance: none;
        }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(58,125,191,0.12);
        }
        .form-group textarea { min-height: 100px; resize: vertical; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-dark);
            color: #B8C4CC;
            padding: 48px 0 28px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer h3 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .site-footer p { margin-bottom: 8px; line-height: 1.7; }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li { margin-bottom: 6px; }
        .footer-links a {
            color: #B8C4CC;
            font-size: 13.5px;
            transition: var(--transition);
        }
        .footer-links a:hover { color: #fff; }
        .footer-brand {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand span { color: var(--primary); }
        .footer-copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 12.5px;
            color: #8898A5;
        }
        .footer-copyright a { color: #8898A5; }
        .footer-copyright a:hover { color: #fff; }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
        }
        .breadcrumb-nav {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-nav a { color: var(--primary); font-weight: 500; }
        .breadcrumb-nav a:hover { color: var(--primary-hover); }
        .breadcrumb-nav .sep { color: #B0BEC5; }

        /* ===== Category Page Specific ===== */
        .category-h1-section {
            padding: 32px 0 16px;
        }
        .category-h1-section h1 {
            font-size: 30px;
            margin-bottom: 8px;
        }
        .category-h1-section .cat-sub {
            color: var(--text-muted);
            font-size: 15px;
        }
        .cat-intro-section {
            background: var(--bg-light);
            padding: 32px 0;
            border-radius: var(--radius-md);
            margin-bottom: 24px;
        }
        .tag-filter-bar {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .tag-filter-btn {
            background: #fff;
            border: 1px solid var(--border-color);
            color: var(--text-body);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .tag-filter-btn:hover, .tag-filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --font-size-h1: 32px;
                --font-size-h2: 23px;
            }
            .hero-inner { gap: 32px; min-height: 440px; }
            .hero-content h1 { font-size: 32px; }
            .feature-grid { grid-template-columns: 1fr 1fr; }
            .feature-grid .feature-card:first-child { grid-row: auto; }
            .scene-grid { grid-template-columns: repeat(2, 1fr); }
            .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
            .news-list { grid-template-columns: repeat(2, 1fr); }
            .guarantee-grid { grid-template-columns: repeat(3, 1fr); }
            .gallery-grid { grid-template-columns: repeat(3, 1fr); }
            .reco-grid { grid-template-columns: repeat(2, 1fr); }
            .brand-trust { flex-direction: column; }
            .contact-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 768px) {
            :root {
                --font-size-h1: 27px;
                --font-size-h2: 21px;
                --spacing-section: 48px;
            }
            .nav-links { display: none; }
            .hamburger { display: block; }
            .mobile-nav-overlay.show { display: block; }
            .hero-inner { flex-direction: column; min-height: auto; padding: 40px 24px 32px; }
            .hero-content h1 { font-size: 26px; }
            .hero-visual { min-height: 240px; width: 100%; }
            .hero-visual img { min-height: 240px; }
            .feature-grid { grid-template-columns: 1fr; }
            .feature-grid .feature-card:first-child { grid-row: auto; }
            .scene-grid { grid-template-columns: 1fr 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }
            .news-list { grid-template-columns: 1fr; }
            .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
            .gallery-grid { grid-template-columns: repeat(2, 1fr); }
            .reco-grid { grid-template-columns: 1fr 1fr; }
            .brand-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .comparison-table th, .comparison-table td { padding: 12px 14px; font-size: 13px; }
            .comparison-table td:first-child { width: 90px; }
        }
        @media (max-width: 520px) {
            :root {
                --font-size-h1: 24px;
                --font-size-h2: 19px;
                --spacing-section: 40px;
            }
            .container { padding: 0 16px; }
            .nav-container { padding: 0 16px; }
            .hero-inner { padding: 28px 16px 24px; }
            .hero-content h1 { font-size: 23px; }
            .hero-subtitle { font-size: 14.5px; }
            .hero-cta-group { flex-direction: column; }
            .btn { width: 100%; }
            .scene-grid { grid-template-columns: 1fr; }
            .guarantee-grid { grid-template-columns: 1fr; }
            .gallery-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
            .gallery-grid img { height: 120px; }
            .reco-grid { grid-template-columns: 1fr; }
            .master-card { flex: 0 0 220px; }
            .brand-trust { padding: 20px; }
            .brand-stats { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
            .brand-stat-item .stat-num { font-size: 22px; }
            .brand-stat-item .stat-label { font-size: 11px; }
            .bottom-cta-inner { flex-direction: column; text-align: center; gap: 10px; }
            .bottom-cta-inner .btn { width: 100%; }
            .contact-form { padding: 18px; }
            .footer-grid { grid-template-columns: 1fr; }
            .breadcrumb-nav { padding: 0 16px; }
        }

/* roulang page: category1 */
:root {
            --primary: #3A7DBF;
            --primary-hover: #2E6AA8;
            --primary-light: #E8F0F8;
            --tea-green: #DCE8D5;
            --warm-beige: #F5F1E8;
            --bg-white: #FFFFFF;
            --bg-light: #F4F7FA;
            --text-dark: #1C2833;
            --text-body: #5A6B7A;
            --text-muted: #8898A5;
            --border-color: #E0E6EC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.1), 0 12px 32px rgba(0,0,0,0.08);
            --transition: all 0.25s ease;
            --spacing-section: 72px;
            --spacing-section-mobile: 44px;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-size-h1: 32px;
            --font-size-h2: 23px;
            --font-size-h3: 18px;
            --font-size-body: 15.5px;
            --font-size-sm: 13px;
            --header-height: 64px;
        }

        @media (max-width: 639px) {
            :root {
                --font-size-h1: 27px;
                --font-size-h2: 21px;
                --spacing-section: 48px;
            }
        }
        @media (max-width: 480px) {
            :root {
                --font-size-h1: 24px;
                --font-size-h2: 19px;
                --spacing-section: 40px;
            }
        }

        html { scroll-behavior: smooth; box-sizing: border-box; }
        *, *::before, *::after { box-sizing: inherit; }

        body {
            font-family: var(--font-base);
            font-size: var(--font-size-body);
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-hover); }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(58,125,191,0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }
        section { padding: var(--spacing-section) 0; }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-alt { background: var(--bg-light); }
        .section-heading { margin-bottom: 16px; }
        .section-heading .kicker {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .section-heading h2 {
            font-size: var(--font-size-h2);
            color: var(--text-dark);
            margin: 0 0 8px 0;
            font-weight: 700;
            line-height: 1.3;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            min-height: 48px;
            text-align: center;
            line-height: 1.4;
            font-family: var(--font-base);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(58,125,191,0.3); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.25);
        }
        .btn-outline:active { transform: translateY(0); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .nav-container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--header-height);
        }
        .brand-logo {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo span { color: var(--primary); }
        .brand-logo i { color: var(--primary); font-size: 20px; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-body);
            font-size: 14.5px;
            font-weight: 500;
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-links .nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            border: none;
            font-weight: 600;
        }
        .nav-links .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 8px;
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 90;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .mobile-nav-overlay.show { opacity: 1; }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            background: #fff;
            z-index: 95;
            box-shadow: -4px 0 24px rgba(0,0,0,0.1);
            transform: translateX(100%);
            transition: transform 0.3s;
            padding: 24px;
            flex-direction: column;
            gap: 16px;
        }
        .mobile-nav-panel.show { transform: translateX(0); }
        .mobile-nav-panel .close-btn {
            align-self: flex-end;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-dark);
        }
        .mobile-nav-panel a {
            font-size: 16px;
            color: var(--text-body);
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .mobile-nav-panel a:hover { color: var(--primary); }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }
        .breadcrumb {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .separator { color: var(--border-color); }
        .breadcrumb .current { color: var(--text-dark); font-weight: 600; }

        /* ===== Category Intro ===== */
        .category-intro-section {
            background: var(--bg-light);
            padding: 48px 0;
        }
        .category-intro-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            max-width: 800px;
        }
        .category-intro-card h2 {
            font-size: var(--font-size-h2);
            color: var(--text-dark);
            margin: 0 0 12px 0;
            font-weight: 700;
        }
        .category-intro-card p {
            color: var(--text-body);
            line-height: 1.8;
            margin: 0;
        }

        /* ===== Grid Cards ===== */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .env-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .env-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .env-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .env-card:hover img { transform: scale(1.03); }
        .env-card-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .env-card-body h3 {
            font-size: 18px;
            color: var(--text-dark);
            margin: 0 0 8px 0;
            font-weight: 600;
            line-height: 1.4;
        }
        .env-card-body p {
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.6;
            margin: 0 0 16px 0;
            flex: 1;
        }
        .env-card-body .btn-link {
            align-self: flex-start;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .env-card-body .btn-link:hover { color: var(--primary-hover); gap: 10px; }

        /* ===== Tags ===== */
        .tags-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 32px;
        }
        .tag-item {
            background: #fff;
            border: 1px solid var(--border-color);
            color: var(--text-body);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            cursor: default;
            white-space: nowrap;
        }
        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        /* ===== Recommendation Cards ===== */
        .rec-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .rec-card {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .rec-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .rec-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .rec-card-body {
            padding: 20px;
        }
        .rec-card-body h3 {
            font-size: 16px;
            color: var(--text-dark);
            margin: 0 0 6px 0;
            font-weight: 600;
        }
        .rec-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            margin-top: 32px;
            max-width: 800px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-base);
            font-size: 15px;
            gap: 16px;
        }
        .faq-question .q-icon {
            color: var(--primary);
            font-weight: 700;
            margin-right: 8px;
        }
        .faq-question .fa-chevron-down {
            color: var(--text-muted);
            transition: transform 0.3s;
        }
        .faq-item.open .faq-question .fa-chevron-down { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-body);
            font-size: 14.5px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            padding: 0 24px 18px;
            max-height: 300px;
        }

        /* ===== Guarantee Bar ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin-top: 32px;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .guarantee-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guarantee-item i {
            color: var(--primary);
            font-size: 20px;
            margin-top: 2px;
        }
        .guarantee-item .guarantee-text {
            font-size: 14px;
            color: var(--text-body);
            font-weight: 500;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-light);
            padding: 48px 0;
        }
        .cta-inner {
            background: linear-gradient(135deg, var(--primary) 0%, #2E6AA8 100%);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            color: #fff;
        }
        .cta-inner h2 {
            font-size: var(--font-size-h2);
            margin: 0 0 12px 0;
            font-weight: 700;
        }
        .cta-inner p {
            font-size: 16px;
            opacity: 0.95;
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .cta-inner .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-inner .btn-primary:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.2);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-dark);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand i { color: var(--primary); }
        .footer-brand span { color: #fff; }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover { color: #fff; }
        .site-footer h3 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 16px 0;
        }
        .footer-copyright {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
        }
        .footer-copyright a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
        }
        .footer-copyright a:hover { color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 640px) {
            .hamburger { display: block; }
            .nav-links { display: none; }
            .mobile-nav-overlay, .mobile-nav-panel { display: flex; }
            .mobile-nav-panel { flex-direction: column; }
            .mobile-nav-panel.show { transform: translateX(0); }
            .mobile-nav-overlay.show { display: block; }
            .grid-cards { grid-template-columns: 1fr; }
            .rec-cards { grid-template-columns: 1fr; }
            .guarantee-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .env-card img { height: 180px; }
        }
        @media (max-width: 480px) {
            .guarantee-grid { grid-template-columns: 1fr; }
            .cta-inner { padding: 32px 20px; }
            .env-card img { height: 160px; }
            .breadcrumb li { font-size: 13px; }
        }

/* roulang page: category2 */
:root {
            --primary: #3A7DBF;
            --primary-hover: #2E6AA8;
            --primary-light: #E8F0F8;
            --tea-green: #DCE8D5;
            --warm-beige: #F5F1E8;
            --bg-white: #FFFFFF;
            --bg-light: #F4F7FA;
            --text-dark: #1C2833;
            --text-body: #5A6B7A;
            --text-muted: #8898A5;
            --border-color: #E0E6EC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.1), 0 12px 32px rgba(0,0,0,0.08);
            --transition: all 0.25s ease;
            --spacing-section: 72px;
            --spacing-section-mobile: 44px;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-size-h1: 38px;
            --font-size-h2: 26px;
            --font-size-h3: 18px;
            --font-size-body: 15.5px;
            --font-size-sm: 13px;
            --header-height: 64px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            font-size: var(--font-size-body);
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-hover);
        }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(58,125,191,0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

        section {
            padding: var(--spacing-section) 0;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .section-subtitle {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
            line-height: 1.75;
        }

        .section-heading {
            margin-bottom: 16px;
        }

        .section-heading .kicker {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            min-height: 48px;
            text-align: center;
            line-height: 1.4;
            font-family: var(--font-base);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(58,125,191,0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(58,125,191,0.25);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-sm {
            padding: 8px 18px;
            min-height: 36px;
            font-size: 14px;
            border-radius: 6px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .nav-container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--header-height);
        }

        .brand-logo {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo span {
            color: var(--primary);
        }
        .brand-logo i {
            color: var(--primary);
            font-size: 20px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-body);
            font-size: 14.5px;
            font-weight: 500;
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .nav-links .nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            border-bottom: none;
            font-weight: 600;
        }
        .nav-links .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            border-bottom: none;
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 8px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.45);
            z-index: 199;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            opacity: 1;
        }

        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            max-width: 85vw;
            height: 100vh;
            background: var(--bg-white);
            z-index: 200;
            box-shadow: -4px 0 20px rgba(0,0,0,0.15);
            padding: 24px 20px;
            transition: right 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-nav-panel.open {
            right: 0;
        }
        .mobile-nav-panel .close-btn {
            align-self: flex-end;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-muted);
            cursor: pointer;
            padding: 4px 8px;
            transition: var(--transition);
        }
        .mobile-nav-panel .close-btn:hover {
            color: var(--text-dark);
        }
        .mobile-nav-panel a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 10px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-nav-panel a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .mobile-nav-panel a.active {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-bar a {
            color: var(--text-muted);
            font-size: 13px;
            transition: var(--transition);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .sep {
            color: var(--text-muted);
            font-size: 13px;
        }
        .breadcrumb-bar .current {
            color: var(--text-dark);
            font-size: 13px;
            font-weight: 500;
        }
        .breadcrumb-bar .back-link {
            margin-left: auto;
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .breadcrumb-bar .back-link:hover {
            color: var(--primary-hover);
        }

        /* ===== Page Header ===== */
        .page-header {
            padding: 32px 0 20px;
            background: var(--bg-white);
        }
        .page-header .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .page-header .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .page-header .breadcrumb a:hover {
            color: var(--primary);
        }
        .page-header .breadcrumb .sep {
            color: var(--border-color);
        }
        .page-header .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 500;
        }
        .page-header h1 {
            font-size: var(--font-size-h1);
            color: var(--text-dark);
            font-weight: 700;
            margin: 0 0 8px;
            line-height: 1.3;
        }
        .page-header .page-sub {
            color: var(--text-body);
            font-size: 15px;
            max-width: 700px;
            line-height: 1.7;
        }

        /* ===== Category Intro ===== */
        .category-intro {
            background: var(--bg-light);
            padding: 24px 28px;
            border-radius: var(--radius-lg);
            margin-top: 8px;
        }
        .category-intro h2 {
            font-size: var(--font-size-h3);
            color: var(--text-dark);
            font-weight: 600;
            margin: 0 0 8px;
        }
        .category-intro p {
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Tea Master Cards - Horizontal Scroll ===== */
        .masters-scroll-wrapper {
            position: relative;
            margin: 0 -24px;
            padding: 0 24px;
        }
        .masters-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding: 8px 0 24px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) var(--border-color);
        }
        .masters-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .masters-scroll::-webkit-scrollbar-track {
            background: var(--border-color);
            border-radius: 3px;
        }
        .masters-scroll::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 3px;
        }

        .master-card {
            flex: 0 0 300px;
            min-width: 280px;
            max-width: 320px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 20px;
            scroll-snap-align: start;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .master-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .master-card .master-img {
            width: 100%;
            aspect-ratio: 1 / 1;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            background: var(--bg-light);
        }
        .master-card .master-name {
            font-size: var(--font-size-h3);
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 4px;
        }
        .master-card .master-specialty {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
        }
        .master-card .master-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.6;
            margin: 0 0 14px;
        }
        .master-card .master-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .master-card .master-link:hover {
            color: var(--primary-hover);
            gap: 6px;
        }

        /* ===== Tag Filter Area ===== */
        .tags-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding: 4px 0;
        }
        .tags-row .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-white);
            color: var(--text-body);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .tags-row .tag-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .tags-row .tag-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .tags-row .tag-pill i {
            font-size: 12px;
        }

        /* ===== Related Recommend ===== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .related-card .related-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .related-card .related-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .related-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 6px;
            line-height: 1.45;
        }
        .related-card .related-desc {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 12px;
            flex: 1;
        }
        .related-card .related-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .related-card .related-link:hover {
            color: var(--primary-hover);
        }

        /* ===== Reviews ===== */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .review-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .review-card .review-stars {
            color: #F5A623;
            font-size: 15px;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }
        .review-card .review-text {
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0 0 12px;
        }
        .review-card .review-author {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .review-card .review-author i {
            color: var(--primary);
        }

        /* ===== Guarantee Bar ===== */
        .guarantee-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .guarantee-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }
        .guarantee-item i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .guarantee-item .g-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 2px;
        }
        .guarantee-item .g-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-size: var(--font-size-h2);
            font-weight: 700;
            margin: 0 0 10px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.88);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            font-weight: 700;
        }
        .cta-section .btn:hover {
            background: var(--primary-hover);
            color: #fff;
            border-color: var(--primary-hover);
            box-shadow: 0 6px 16px rgba(0,0,0,0.25);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-dark);
            color: rgba(255,255,255,0.75);
            padding: 52px 0 0;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand span {
            color: var(--primary-light);
        }
        .site-footer .footer-brand i {
            color: var(--primary);
        }
        .site-footer p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }
        .site-footer h3 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 12px;
        }
        .site-footer .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .site-footer .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-links li {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
        }
        .site-footer .footer-copyright {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding: 18px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .site-footer .footer-copyright a {
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .site-footer .footer-copyright a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --font-size-h1: 32px;
                --font-size-h2: 23px;
            }

            .master-card {
                flex: 0 0 280px;
                min-width: 260px;
            }

            .related-grid,
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .guarantee-strip {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-size-h1: 27px;
                --font-size-h2: 21px;
                --spacing-section: 48px;
            }

            .nav-links {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav-overlay {
                display: block;
            }

            .masters-scroll-wrapper {
                margin: 0 -16px;
                padding: 0 16px;
            }
            .master-card {
                flex: 0 0 260px;
                min-width: 240px;
                padding: 16px;
            }

            .related-grid,
            .reviews-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .guarantee-strip {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .cta-section {
                padding: 28px 20px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .page-header h1 {
                font-size: 24px;
            }
            .category-intro {
                padding: 18px 16px;
            }
            .breadcrumb-bar .back-link {
                margin-left: 0;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-size-h1: 24px;
                --font-size-h2: 19px;
                --spacing-section: 40px;
            }

            .container {
                padding: 0 16px;
            }

            .master-card {
                flex: 0 0 240px;
                min-width: 220px;
            }
            .master-card .master-img {
                aspect-ratio: 4 / 3;
            }

            .tags-row {
                gap: 8px;
            }
            .tags-row .tag-pill {
                font-size: 12px;
                padding: 6px 12px;
            }

            .cta-section h2 {
                font-size: 18px;
            }
            .cta-section p {
                font-size: 14px;
            }
            .btn {
                font-size: 14px;
                padding: 10px 20px;
                min-height: 44px;
            }
        }