/* roulang page: index */
:root {
            --bs-primary: #0B3D3A;
            --bs-secondary: #FF6B4A;
            --bs-success: #0B8A7E;
            --bs-warning: #F5A623;
            --bs-border-radius-lg: 16px;
            --bs-border-radius: 12px;
            --deep-teal: #0B3D3A;
            --coral-orange: #FF6B4A;
            --warm-white: #FAF8F5;
            --pure-white: #FFFFFF;
            --dark-bg: #0A2E2B;
            --text-primary: #1A1A1A;
            --text-secondary: #5C5C5C;
            --text-light: #D4E5E3;
            --gold-yellow: #F5A623;
            --gradient-hero: linear-gradient(135deg, #0B3D3A 0%, #0F4F4A 50%, #0A2E2B 100%);
            --gradient-btn: linear-gradient(135deg, #FF6B4A 0%, #E85D3A 100%);
            --gradient-badge: linear-gradient(135deg, #F5A623 0%, #E5941A 100%);
            --shadow-default: 0 2px 12px rgba(11, 61, 58, 0.06);
            --shadow-hover: 0 8px 30px rgba(11, 61, 58, 0.12);
            --shadow-highlight: 0 4px 24px rgba(255, 107, 74, 0.15);
            --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
            background-color: var(--warm-white);
            color: var(--text-primary);
            line-height: 1.7;
            font-weight: 400;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        .num-font {
            font-family: "Inter", "SF Pro Display", system-ui, sans-serif;
            font-weight: 800;
        }

        h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
            font-weight: 700;
            letter-spacing: -0.3px;
        }
        h1 { font-size: 48px; line-height: 1.2; }
        h2 { font-size: 36px; line-height: 1.3; }
        h3 { font-size: 24px; font-weight: 600; line-height: 1.4; }
        h4 { font-size: 20px; font-weight: 600; }

        .text-muted-custom { color: var(--text-secondary) !important; }
        .text-light-custom { color: var(--text-light) !important; }

        .section-padding { padding: 80px 0; }

        /* 导航栏 */
        .navbar {
            background: rgba(250, 248, 245, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
            transition: var(--transition-smooth);
            z-index: 1030;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.6rem;
            color: var(--deep-teal) !important;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 1px;
        }
        .navbar-brand .whale-icon {
            width: 32px;
            height: 32px;
            background: var(--gradient-hero);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
        }
        .nav-chip {
            border-radius: 24px;
            padding: 8px 20px;
            margin: 0 4px;
            background: #F0EDEA;
            color: var(--text-primary);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition-smooth);
            border: none;
            white-space: nowrap;
        }
        .nav-chip:hover, .nav-chip.active {
            background: var(--deep-teal);
            color: white;
            box-shadow: 0 2px 8px rgba(11,61,58,0.2);
        }
        .nav-cta-btn {
            border-radius: 50px;
            padding: 10px 28px;
            font-weight: 600;
            background: var(--gradient-btn);
            color: white;
            border: none;
            transition: var(--transition-smooth);
            box-shadow: 0 4px 12px rgba(255,107,74,0.3);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: linear-gradient(135deg, #E85D3A 0%, #CC4A2A 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(255,107,74,0.4);
            color: white;
        }
        .navbar-toggler { border: none; color: var(--deep-teal); }
        .navbar-toggler:focus { box-shadow: none; }

        @media (max-width: 991.98px) {
            .navbar-nav { align-items: center; gap: 8px; padding-top: 16px; }
            .nav-chip { width: 100%; text-align: center; margin: 4px 0; }
        }

        /* Hero */
        .hero-section {
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
            padding: 100px 0 80px;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            right: -10%;
            bottom: -20%;
            width: 60%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" opacity="0.08"><path d="M40 140 Q80 20 160 80" stroke="white" stroke-width="2" fill="none"/><path d="M20 160 Q60 60 140 100" stroke="white" stroke-width="1.5" fill="none"/><circle cx="150" cy="60" r="8" fill="white"/></svg>') no-repeat;
            background-size: contain;
            pointer-events: none;
        }
        .hero-title {
            color: white;
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .hero-subtitle {
            color: var(--text-light);
            font-size: 18px;
            margin-bottom: 40px;
        }
        .btn-primary-custom {
            background: var(--gradient-btn);
            color: white;
            border-radius: 50px;
            padding: 14px 36px;
            font-weight: 600;
            border: none;
            transition: var(--transition-smooth);
            box-shadow: 0 4px 14px rgba(255,107,74,0.35);
        }
        .btn-primary-custom:hover {
            background: linear-gradient(135deg, #E85D3A 0%, #CC4A2A 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(255,107,74,0.45);
            color: white;
        }
        .btn-outline-coral {
            background: transparent;
            color: var(--coral-orange);
            border: 2px solid var(--coral-orange);
            border-radius: 50px;
            padding: 14px 36px;
            font-weight: 600;
            transition: var(--transition-smooth);
        }
        .btn-outline-coral:hover {
            background: var(--coral-orange);
            color: white;
            border-color: var(--coral-orange);
            transform: translateY(-2px);
        }
        .hero-badge {
            background: rgba(255,255,255,0.12);
            border-radius: 12px;
            padding: 12px 20px;
            color: white;
            backdrop-filter: blur(4px);
        }
        .hero-badge .num-font {
            background: var(--gradient-badge);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 28px;
        }
        .hero-img-placeholder {
            width: 100%;
            height: auto;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.3);
        }

        /* 亮点卡片 */
        .highlight-card {
            background: var(--pure-white);
            border-radius: 16px;
            padding: 32px 28px;
            box-shadow: var(--shadow-default);
            transition: var(--transition-smooth);
            border: 1px solid rgba(0,0,0,0.03);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .highlight-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(11,61,58,0.08);
        }
        .icon-circle {
            width: 64px;
            height: 64px;
            background: rgba(11,61,58,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--deep-teal);
            margin-bottom: 24px;
            transition: var(--transition-smooth);
        }
        .highlight-card:hover .icon-circle {
            background: var(--coral-orange);
            color: white;
            box-shadow: 0 4px 12px rgba(255,107,74,0.3);
        }
        .micro-badge {
            background: rgba(245,166,35,0.1);
            color: var(--gold-yellow);
            font-weight: 600;
            border-radius: 20px;
            padding: 4px 12px;
            font-size: 13px;
            display: inline-block;
            align-self: flex-start;
            margin-top: auto;
        }

        /* 案例瀑布流 */
        .masonry-grid {
            column-count: 3;
            column-gap: 24px;
        }
        .case-card {
            background: var(--pure-white);
            border-radius: 12px;
            box-shadow: var(--shadow-default);
            margin-bottom: 24px;
            break-inside: avoid;
            overflow: hidden;
            transition: var(--transition-smooth);
            border: 1px solid rgba(0,0,0,0.02);
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .case-img {
            width: 100%;
            display: block;
            aspect-ratio: 4/3;
            object-fit: cover;
            background-color: #e9ecef;
        }
        .case-content {
            padding: 20px;
        }
        .chip-tag {
            background: #F0EDEA;
            color: var(--text-secondary);
            border-radius: 24px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            display: inline-block;
            margin-bottom: 8px;
        }
        @media (max-width: 991.98px) {
            .masonry-grid { column-count: 2; }
        }
        @media (max-width: 767.98px) {
            .masonry-grid { column-count: 1; }
            h1 { font-size: 36px; }
            h2 { font-size: 28px; }
            .hero-section { padding: 80px 0 60px; }
            .section-padding { padding: 60px 0; }
        }

        /* 方案对比 */
        .plan-card {
            background: white;
            border-radius: 20px;
            padding: 40px 32px;
            box-shadow: var(--shadow-default);
            transition: var(--transition-smooth);
            border: 2px solid transparent;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .plan-card.recommended {
            border-color: var(--coral-orange);
            box-shadow: var(--shadow-highlight);
            position: relative;
        }
        .recommended-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--gradient-badge);
            color: white;
            border-radius: 50px;
            padding: 6px 24px;
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0;
        }
        .feature-list li {
            padding: 10px 0;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid #f0f0f0;
        }
        .feature-list li i {
            font-size: 1.2rem;
        }
        .text-success-custom { color: var(--bs-success) !important; }

        /* FAQ */
        .accordion-button {
            font-weight: 600;
            font-size: 18px;
            color: var(--text-primary);
            background: white;
            box-shadow: none;
            padding: 24px 28px;
        }
        .accordion-button:not(.collapsed) {
            background: white;
            color: var(--coral-orange);
            box-shadow: none;
        }
        .accordion-button:focus {
            border-color: rgba(11,61,58,0.15);
            box-shadow: 0 0 0 0.15rem rgba(11,61,58,0.1);
        }
        .accordion-item {
            border: none;
            margin-bottom: 12px;
            border-radius: 16px !important;
            overflow: hidden;
            box-shadow: var(--shadow-default);
        }
        .accordion-body {
            padding: 0 28px 24px;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 16px;
        }

        /* CTA 横幅 */
        .cta-banner {
            background: linear-gradient(135deg, #0B3D3A 0%, #0A2E2B 100%);
            border-radius: 32px;
            padding: 80px 40px;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.03)" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom repeat-x;
            background-size: cover;
            pointer-events: none;
        }

        /* 页脚 */
        .footer {
            background: var(--deep-teal);
            color: var(--text-light);
            padding: 60px 0 0;
        }
        .footer a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer a:hover { color: var(--coral-orange); }
        .footer-bottom {
            background: #082522;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 16px 0;
            margin-top: 40px;
        }
        .qr-placeholder {
            width: 90px;
            height: 90px;
            background: rgba(255,255,255,0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 12px;
        }