/* roulang page: index */
:root {
            --deep-charcoal: #1C1C1E;
            --sandstone-gold: #C8A96E;
            --sandstone-gold-hover: #B8944A;
            --warm-white: #FAF8F5;
            --dove-gray: #E5E0D8;
            --deep-brown: #4A3B2F;
            --card-bg: #FFFFFF;
            --border-light: #E5E0D8;
            --text-primary: #1C1C1E;
            --text-secondary: #4A3B2F;
            --text-light: #6B6B6F;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 8px 24px rgba(28,28,30,0.06);
            --shadow-hover: 0 12px 32px rgba(28,28,30,0.12);
            --transition-base: 0.3s ease;
            --section-gap: 120px;
            --mobile-section-gap: 64px;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            background-color: var(--warm-white);
            color: var(--text-primary);
            line-height: 1.8;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            font-weight: 600;
            letter-spacing: -0.3px;
            color: var(--deep-charcoal);
            margin-top: 0;
        }

        h1 {
            font-size: 48px;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        h2 {
            font-size: 36px;
            font-weight: 600;
            line-height: 1.3;
        }
        h3 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.4;
        }

        a {
            color: var(--sandstone-gold);
            transition: color var(--transition-base);
            text-decoration: none;
        }
        a:hover {
            color: var(--sandstone-gold-hover);
        }

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

        button, .button {
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ---------- 导航 ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(28,28,30,0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200,169,110,0.25);
            transition: background var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(28,28,30,0.95);
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 24px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 1px;
            text-decoration: none;
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--sandstone-gold);
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
            display: inline-block;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: #DDDDDD;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            transition: color var(--transition-base), border-color var(--transition-base);
            text-decoration: none;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--sandstone-gold);
            border-bottom-color: var(--sandstone-gold);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 2px;
            background: #FFFFFF;
            transition: var(--transition-base);
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(28,28,30,0.98);
                flex-direction: column;
                padding: 32px 24px;
                gap: 24px;
                display: none;
            }
            .nav-links.open {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
        }

        /* ---------- 板块通用 ---------- */
        section {
            padding: var(--section-gap) 0;
        }
        @media (max-width: 768px) {
            section {
                padding: var(--mobile-section-gap) 0;
            }
            h1 { font-size: 36px; }
            h2 { font-size: 30px; }
        }

        .section-label {
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--sandstone-gold);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        /* ---------- Hero ---------- */
        #hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background-color: var(--deep-charcoal);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding-top: 72px;
            color: #FFFFFF;
        }
        #hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(200,169,110,0.15) 0%, rgba(28,28,30,0.7) 80%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 48px;
            width: 100%;
        }
        .hero-text {
            flex: 1;
        }
        .hero-text h1 {
            color: #FFFFFF;
            font-size: 56px;
            margin-bottom: 20px;
            animation: fadeUp 0.7s ease;
        }
        .hero-text .subtitle {
            font-size: 20px;
            color: #E5E0D8;
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 480px;
        }
        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--sandstone-gold);
            color: var(--deep-charcoal);
            padding: 14px 36px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            position: relative;
            overflow: hidden;
        }
        .btn-primary::after {
            content: '';
            position: absolute;
            top: 0;
            left: -75%;
            width: 50%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
            transform: skewX(-20deg);
            transition: left 0.6s;
        }
        .btn-primary:hover::after {
            left: 120%;
        }
        .btn-primary:hover {
            background: var(--sandstone-gold-hover);
        }
        .btn-ghost {
            background: transparent;
            border: 1.5px solid var(--sandstone-gold);
            color: var(--sandstone-gold);
            padding: 14px 36px;
            font-weight: 500;
        }
        .btn-ghost:hover {
            background: rgba(200,169,110,0.08);
        }
        .hero-visual {
            flex: 1;
            max-width: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
        }
        .hero-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        @media (max-width: 768px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            .hero-text h1 { font-size: 40px; }
            .hero-visual { max-width: 320px; margin-top: 24px; }
        }

        /* ---------- 痛点卡片 ---------- */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 40px;
        }
        .pain-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: all var(--transition-base);
        }
        .pain-card:hover {
            border-color: var(--sandstone-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .pain-icon {
            font-size: 32px;
            color: var(--sandstone-gold);
            margin-bottom: 16px;
        }

        /* ---------- 解决方案卡片 ---------- */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-top: 40px;
        }
        .solution-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--sandstone-gold);
        }
        .solution-card img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .solution-card-body {
            padding: 24px;
            position: relative;
        }
        .solution-card-body h3 {
            margin-bottom: 10px;
        }
        .gold-line {
            width: 40px;
            height: 3px;
            background: var(--sandstone-gold);
            margin: 16px 0;
            transition: width 0.4s ease;
        }
        .solution-card:hover .gold-line {
            width: 100%;
        }

        /* ---------- 数据条 ---------- */
        #results {
            background: var(--deep-charcoal);
            color: #FFFFFF;
        }
        .stats-grid {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 40px;
            text-align: center;
        }
        .stat-number {
            font-size: 64px;
            font-weight: 700;
            color: var(--sandstone-gold);
            line-height: 1.1;
        }
        @media (max-width: 768px) {
            .stat-number { font-size: 48px; }
        }

        /* ---------- 证言 ---------- */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 40px;
        }
        .testimonial-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.04);
            border-left: 4px solid var(--sandstone-gold);
        }

        /* ---------- FAQ ---------- */
        .accordion-faq {
            margin-top: 40px;
        }
        .accordion-item {
            border-bottom: 1px solid var(--dove-gray);
        }
        .accordion-title {
            background: transparent;
            padding: 20px 0;
            font-weight: 600;
            font-size: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--deep-charcoal);
        }
        .accordion-title .icon {
            transition: transform 0.3s;
            color: var(--sandstone-gold);
        }
        .accordion-title[aria-expanded="true"] .icon {
            transform: rotate(45deg);
        }
        .accordion-content {
            padding: 0 0 20px;
            display: none;
        }
        .accordion-content.show {
            display: block;
        }

        /* ---------- CTA ---------- */
        #cta {
            background: var(--deep-charcoal);
            text-align: center;
        }
        #cta h2 {
            color: #FFFFFF;
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: var(--deep-charcoal);
            color: #BBBBBB;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .footer-bottom {
            border-top: 1px solid #3A3A3C;
            margin-top: 40px;
            padding-top: 24px;
            text-align: center;
        }

        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @media (prefers-reduced-motion: reduce) {
            * { animation: none !important; transition: none !important; }
        }