/* roulang page: index */
:root {
            --primary-deep: #1E3A32;
            --accent-gold: #C49A6C;
            --bg-warm: #F5F3EF;
            --text-body: #3A3A3C;
            --text-muted: #6B6B6F;
            --white: #FFFFFF;
            --border-light: #E5E2DD;
            --shadow-sm: 0 2px 12px rgba(30,58,50,0.06);
            --shadow-md: 0 8px 28px rgba(30,58,50,0.12);
            --radius-md: 10px;
            --radius-sm: 8px;
            --radius-btn: 6px;
            --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', system-ui, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1200px;
            --nav-height: 72px;
            --bottom-tab-height: 60px;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--white);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 0;
            margin: 0;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* 导航 */
        .xpj-header {
            background: var(--white);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 40;
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
            border-bottom: 1px solid rgba(30,58,50,0.05);
        }

        .xpj-header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo {
            font-family: var(--font-title);
            font-weight: 700;
            font-size: 1.7rem;
            color: var(--primary-deep);
            letter-spacing: 0.5px;
            text-decoration: none;
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent-gold);
        }

        .desktop-nav {
            display: flex;
            gap: 2.2rem;
            align-items: center;
        }
        .desktop-nav a {
            font-weight: 500;
            color: var(--text-body);
            text-decoration: none;
            font-size: 1rem;
            padding-bottom: 6px;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            color: var(--accent-gold);
            border-bottom-color: var(--accent-gold);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-deep);
            cursor: pointer;
        }

        /* 移动端底部导航 */
        .mobile-bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: var(--bottom-tab-height);
            background: var(--white);
            box-shadow: 0 -2px 12px rgba(0,0,0,0.04);
            z-index: 45;
            justify-content: space-around;
            align-items: center;
            border-top: 1px solid var(--border-light);
            padding-bottom: env(safe-area-inset-bottom);
        }
        .mobile-bottom-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            text-decoration: none;
            font-size: 11px;
            font-weight: 500;
            gap: 4px;
            transition: 0.2s;
            flex: 1;
        }
        .mobile-bottom-nav a i {
            font-size: 1.4rem;
            line-height: 1;
        }
        .mobile-bottom-nav a.active {
            color: var(--primary-deep);
        }

        /* Hero */
        #hero {
            background: linear-gradient(90deg, rgba(30,58,50,0.78) 0%, rgba(30,58,50,0.25) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 75vh;
            display: flex;
            align-items: center;
            color: white;
            position: relative;
        }
        .hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
        }
        .hero-text {
            flex: 1 1 50%;
        }
        .hero-text h1 {
            font-family: var(--font-title);
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1.4rem;
            color: white;
        }
        .hero-text p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 2rem;
            max-width: 90%;
            line-height: 1.7;
        }
        .btn-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--accent-gold);
            color: white;
            padding: 0.85rem 2.3rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: 0.25s;
            border: none;
            box-shadow: 0 4px 10px rgba(196,154,108,0.3);
        }
        .btn-primary:hover {
            background: #A87D52;
            color: white;
            box-shadow: 0 8px 18px rgba(168,125,82,0.4);
        }
        .btn-outline {
            border: 2px solid white;
            color: white;
            padding: 0.8rem 2.2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            text-decoration: none;
            background: transparent;
            transition: 0.25s;
        }
        .btn-outline:hover {
            background: white;
            color: var(--primary-deep);
        }

        /* 通用板块 */
        section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            font-family: var(--font-title);
            font-size: 2.2rem;
            font-weight: 600;
            color: var(--primary-deep);
            margin-bottom: 0.8rem;
            text-align: center;
        }
        .section-sub {
            color: var(--text-muted);
            text-align: center;
            margin-bottom: 3rem;
            font-size: 1.1rem;
        }

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

        /* 卡片 */
        .card {
            background: white;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 2rem 1.8rem;
            transition: all 0.3s ease;
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .icon-circle {
            width: 60px;
            height: 60px;
            background: rgba(196,154,108,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.8rem;
            margin-bottom: 1.4rem;
        }

        .stat-number {
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--primary-deep);
            line-height: 1.2;
        }

        .case-img {
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-sm);
            width: 100%;
            transition: transform 0.35s ease;
        }
        .case-card:hover .case-img {
            transform: scale(1.03);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
        }
        .faq-question {
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 1.2rem 0;
            font-weight: 600;
            font-size: 1.15rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--primary-deep);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            color: var(--text-body);
            padding-right: 2rem;
        }

        footer {
            background: var(--primary-deep);
            color: #F5F3EF;
            padding: 3.5rem 0 2rem;
        }
        footer a {
            color: var(--accent-gold);
            text-decoration: none;
        }
        .copyright {
            border-top: 1px solid rgba(245,243,239,0.15);
            padding-top: 1.8rem;
            margin-top: 2rem;
            font-size: 0.9rem;
            color: #ccc;
        }

        @media (max-width: 1024px) {
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            .mobile-bottom-nav { display: flex; }
            body { padding-bottom: var(--bottom-tab-height); }
            #hero { min-height: 65vh; }
            .hero-text h1 { font-size: 2.5rem; }
        }

        @media (max-width: 640px) {
            .hero-text { flex: 1 1 100%; }
            .hero-content { flex-direction: column; }
            .btn-group { flex-direction: column; align-items: stretch; }
        }