/* roulang page: index */
:root {
            --deep-wood: #3B2F2F;
            --warm-copper: #C49A6C;
            --silk-gray: #F7F4EF;
            --card-white: #FFFCF7;
            --charcoal: #1E1C1A;
            --body-text: #4A4543;
            --muted-text: #8C8279;
            --jade-green: #2D5A4B;
            --border-light: #E8E2DA;
            --bg-accent: #F0EBE3;
            --radius-card: 8px;
            --radius-btn: 6px;
            --radius-input: 4px;
            --shadow-sm: 0 2px 16px rgba(59,47,47,0.06);
            --shadow-md: 0 6px 24px rgba(59,47,47,0.12);
            --transition: all 0.3s ease;
            --font-serif: "Noto Serif SC", "STSong", "Songti SC", "SimSun", serif;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--silk-gray);
            color: var(--body-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, .serif {
            font-family: var(--font-serif);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 导航 */
        .top-bar {
            background: rgba(247,244,239,0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid transparent;
            transition: var(--transition);
            padding: 0.5rem 0;
        }
        .top-bar.sticky {
            border-bottom: 1px solid var(--warm-copper);
            box-shadow: 0 2px 12px rgba(59,47,47,0.04);
        }
        .top-bar .menu li a {
            color: var(--body-text);
            font-size: 16px;
            font-weight: 400;
            padding: 0.75rem 1rem;
            transition: var(--transition);
            position: relative;
        }
        .top-bar .menu li a::after {
            content: '';
            position: absolute;
            bottom: 6px;
            left: 1rem;
            width: 0;
            height: 2px;
            background: var(--warm-copper);
            transition: width 0.25s ease;
        }
        .top-bar .menu li a:hover {
            color: var(--warm-copper);
        }
        .top-bar .menu li a:hover::after {
            width: calc(100% - 2rem);
        }
        .logo-text {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 22px;
            color: var(--deep-wood);
            letter-spacing: 0.02em;
        }
        .logo-decor {
            color: var(--warm-copper);
            font-size: 14px;
            margin-left: 6px;
        }
        .search-icon {
            color: var(--muted-text);
            font-size: 18px;
            margin-left: 1.5rem;
            cursor: default;
        }
        .off-canvas {
            background: var(--deep-wood);
        }
        .off-canvas .menu li a {
            color: var(--silk-gray);
            font-size: 18px;
            padding: 0.8rem 1.5rem;
        }

        /* 板块通用 */
        section {
            padding: 90px 0 100px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 600;
            color: var(--deep-wood);
            margin-bottom: 1.2rem;
            position: relative;
            display: inline-block;
            letter-spacing: 0.02em;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 48px;
            height: 2px;
            background: var(--warm-copper);
            margin-top: 0.6rem;
        }
        .section-sub {
            font-size: 16px;
            color: var(--muted-text);
            margin-bottom: 3rem;
            max-width: 600px;
        }

        /* Hero */
        #hero {
            padding: 120px 0 100px;
            background: linear-gradient(90deg, rgba(247,244,239,0.92) 0%, rgba(247,244,239,0.7) 55%, rgba(247,244,239,0.2) 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-image {
            position: absolute;
            right: 0;
            top: 0;
            width: 50%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-tag {
            font-size: 18px;
            color: var(--warm-copper);
            letter-spacing: 0.08em;
            margin-bottom: 0.8rem;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 700;
            color: var(--deep-wood);
            line-height: 1.2;
            margin-bottom: 1.5rem;
            letter-spacing: 0.02em;
        }
        .hero-desc {
            font-size: 18px;
            color: var(--body-text);
            max-width: 480px;
            line-height: 1.8;
            margin-bottom: 2.5rem;
        }
        .btn-primary {
            background: var(--deep-wood);
            color: var(--card-white);
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            letter-spacing: 0.04em;
            display: inline-block;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--warm-copper);
            color: var(--charcoal);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--deep-wood);
            color: var(--deep-wood);
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            letter-spacing: 0.04em;
            display: inline-block;
            transition: var(--transition);
            margin-left: 16px;
        }
        .btn-outline:hover {
            background: var(--deep-wood);
            color: var(--card-white);
        }
        .hero-line {
            width: 60px;
            height: 2px;
            background: var(--warm-copper);
            margin-bottom: 1.8rem;
        }

        /* 服务卡片 */
        .service-card {
            background: var(--card-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: left;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--warm-copper);
        }
        .service-icon {
            font-size: 40px;
            color: var(--warm-copper);
            margin-bottom: 1.2rem;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--charcoal);
            margin-bottom: 0.8rem;
        }
        .service-card p {
            font-size: 16px;
            color: var(--body-text);
            margin-bottom: 1.2rem;
        }
        .text-link {
            color: var(--warm-copper);
            font-weight: 500;
            font-size: 15px;
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: var(--transition);
        }
        .text-link:hover {
            border-bottom: 1px solid var(--warm-copper);
        }

        /* 优势 */
        #advantages {
            background: var(--bg-accent);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--jade-green);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 16px;
            color: var(--deep-wood);
            margin: 0.5rem 0;
        }
        .stat-line {
            width: 32px;
            height: 3px;
            background: var(--warm-copper);
            margin: 0.5rem auto 0;
        }

        /* 流程 */
        .step-circle {
            width: 44px;
            height: 44px;
            background: var(--deep-wood);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 1rem;
        }
        .step-dash {
            width: 60px;
            height: 1px;
            border-top: 2px dashed var(--border-light);
            margin: 0 8px;
            align-self: center;
        }

        /* 案例卡片 */
        .case-card {
            background: var(--card-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .case-card:hover {
            box-shadow: var(--shadow-md);
        }
        .case-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .case-body {
            padding: 1.5rem;
        }
        .badge {
            background: var(--bg-accent);
            color: var(--muted-text);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            margin-right: 8px;
            transition: var(--transition);
        }
        .badge:hover {
            background: var(--warm-copper);
            color: white;
        }

        /* FAQ */
        .accordion-title {
            font-size: 18px;
            font-weight: 500;
            color: var(--deep-wood);
            border-left: 4px solid var(--warm-copper);
            padding-left: 16px;
            background: var(--card-white);
            border-radius: 0;
        }
        .accordion-content {
            background: var(--card-white);
            color: var(--body-text);
            font-size: 16px;
            line-height: 1.8;
            padding: 1rem 1.5rem;
        }

        /* 联系 */
        #contact {
            background: var(--deep-wood);
            color: var(--silk-gray);
        }
        #contact .section-title {
            color: white;
        }
        .contact-input {
            background: #4A4543;
            border: none;
            color: var(--silk-gray);
            padding: 12px 16px;
            border-radius: var(--radius-input);
            margin-bottom: 1rem;
            width: 100%;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }
        .contact-input:focus {
            outline: none;
            border-bottom: 2px solid var(--warm-copper);
            background: #5A5553;
        }
        .contact-input::placeholder {
            color: var(--muted-text);
        }
        .btn-gold {
            background: var(--warm-copper);
            color: var(--charcoal);
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-gold:hover {
            background: #D4AE7C;
        }
        .contact-info h4 {
            color: var(--warm-copper);
        }

        /* 页脚 */
        #footer {
            background: var(--charcoal);
            color: var(--muted-text);
            padding: 60px 0 30px;
            border-top: 2px solid var(--warm-copper);
        }
        .footer-links a {
            color: var(--muted-text);
            display: block;
            margin-bottom: 0.5rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--warm-copper);
        }
        .social-icons i {
            font-size: 22px;
            margin-right: 18px;
            color: var(--muted-text);
            transition: var(--transition);
            cursor: pointer;
        }
        .social-icons i:hover {
            color: var(--warm-copper);
        }
        .copyright {
            font-size: 13px;
            text-align: center;
            margin-top: 40px;
            border-top: 1px solid #3a3533;
            padding-top: 20px;
        }

        @media (max-width: 1024px) {
            .hero-image {
                width: 40%;
            }
        }
        @media (max-width: 768px) {
            .hero-image {
                display: none;
            }
            .hero-title {
                font-size: 36px;
            }
            .btn-outline {
                margin-left: 0;
                margin-top: 12px;
            }
            .step-dash {
                display: none;
            }
        }