/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #1A211E;
      --accent: #FF6B35;
      --bg-light: #FAF9F7;
      --bg-alt: #F0F2F0;
      --text-dark: #0F1412;
      --text-mid: #2A3530;
      --text-body: #4A5550;
      --text-light: #8A948E;
      --white: #FFFFFF;
      --border-light: rgba(15,20,18,0.08);
      --shadow-card: 0 2px 12px rgba(15,20,18,0.06);
      --shadow-hover: 0 8px 28px rgba(15,20,18,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --radius-lg: 16px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, sans-serif;
      --font-number: "Inter", "SF Pro Display", system-ui;
      --transition: 0.3s ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .number-font { font-family: var(--font-number); }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
    h1, h2, h3, h4 { color: var(--text-dark); }
    .section-padding { padding: 100px 0; }
    @media (max-width: 1024px) {
      .section-padding { padding: 80px 0; }
      .container { padding: 0 20px; }
    }
    @media (max-width: 768px) {
      .section-padding { padding: 60px 0; }
      h1 { font-size: 36px !important; }
      h2 { font-size: 28px !important; }
    }

    /* 品牌行 */
    .brand-row { height: 56px; background: var(--white); border-bottom: 1px solid var(--border-light); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
    .logo-text { font-size: 18px; font-weight: 700; color: var(--primary); letter-spacing: -0.3px; display: flex; align-items: center; gap: 8px; }
    .logo-icon { width: 28px; height: 28px; background: var(--accent); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: white; font-size: 14px; }
    .brand-actions { display: flex; align-items: center; gap: 20px; }
    .search-icon { font-size: 18px; color: var(--text-light); cursor: pointer; transition: var(--transition); }
    .search-icon:hover { color: var(--primary); }
    .lang-switch { font-size: 13px; font-weight: 500; color: var(--text-mid); cursor: pointer; }
    .btn-small { background: var(--accent); color: white; padding: 8px 18px; border-radius: 20px; font-size: 13px; font-weight: 600; transition: 0.25s; white-space: nowrap; }
    .btn-small:hover { background: #E55A2B; transform: translateY(-1px); }

    /* 频道导航 */
    .channel-nav { height: 48px; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; gap: 8px; overflow-x: auto; white-space: nowrap; padding: 0 16px; position: sticky; top: 0; z-index: 50; transition: var(--transition); }
    .channel-item { padding: 8px 18px; font-size: 14px; font-weight: 500; color: var(--text-body); border-radius: 20px; transition: var(--transition); }
    .channel-item:hover, .channel-item.active { color: var(--primary); background: rgba(26,33,30,0.05); font-weight: 600; }
    .channel-item.active { border-bottom: 3px solid var(--accent); border-radius: 0; background: transparent; }

    /* Hero */
    .hero { min-height: 85vh; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; position: relative; display: flex; align-items: center; }
    .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(26,33,30,0.85) 0%, rgba(26,33,30,0.5) 100%); }
    .hero-content { position: relative; z-index: 2; width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
    .hero-left { max-width: 580px; }
    .hero-title { font-size: 58px; font-weight: 800; line-height: 1.15; color: white; margin-bottom: 24px; }
    .hero-sub { font-size: 18px; color: rgba(255,255,255,0.9); line-height: 1.6; margin-bottom: 36px; max-width: 480px; }
    .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-primary { background: var(--accent); color: white; padding: 14px 32px; border-radius: var(--radius-btn); font-weight: 600; font-size: 16px; transition: 0.25s; display: inline-block; text-align: center; }
    .btn-primary:hover { background: #E55A2B; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255,107,53,0.3); }
    .btn-secondary { background: transparent; border: 1.5px solid white; color: white; padding: 14px 32px; border-radius: var(--radius-btn); font-weight: 600; font-size: 16px; transition: 0.25s; }
    .btn-secondary:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
    .hero-cards { display: flex; flex-direction: column; gap: 16px; }
    .float-card { background: rgba(255,255,255,0.1); backdrop-filter: blur(12px); border-radius: var(--radius-lg); padding: 24px; color: white; animation: float 4s ease-in-out infinite; }
    .float-card:nth-child(2) { animation-delay: 1.5s; margin-left: 20px; }
    .float-number { font-size: 38px; font-weight: 800; color: var(--accent); }
    .float-label { font-size: 14px; opacity: 0.8; margin-top: 4px; }
    @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

    /* 通用板块标题 */
    .section-title { font-size: 38px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; position: relative; display: inline-block; }
    .section-title::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 48px; height: 4px; background: var(--accent); border-radius: 2px; }
    .section-desc { color: var(--text-body); font-size: 17px; max-width: 700px; margin-bottom: 48px; }

    /* 卡片网格 */
    .grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
    .service-card { background: white; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); transition: var(--transition); }
    .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .card-img { height: 180px; overflow: hidden; position: relative; }
    .card-img img { width: 100%; height: 100%; object-fit: cover; transition: 0.4s ease; }
    .service-card:hover .card-img img { transform: scale(1.05); }
    .card-body { padding: 24px; }
    .card-body h3 { font-size: 20px; font-weight: 600; color: var(--text-mid); margin-bottom: 8px; }
    .card-body p { font-size: 15px; color: var(--text-body); margin-bottom: 16px; }
    .link-arrow { color: var(--accent); font-weight: 600; font-size: 14px; transition: 0.2s; }
    .link-arrow i { margin-left: 4px; transition: 0.2s; }
    .link-arrow:hover i { transform: translateX(4px); }

    /* 优势不对称 */
    .adv-grid { display: grid; grid-template-columns: 3fr 7fr; gap: 48px; align-items: center; }
    .adv-numbers { display: flex; flex-direction: column; gap: 40px; }
    .adv-number { font-size: 56px; font-weight: 800; color: var(--accent); }
    .adv-label { font-size: 16px; color: var(--primary); font-weight: 500; }
    .adv-details { display: flex; flex-direction: column; gap: 32px; }
    .adv-item h4 { font-size: 18px; font-weight: 600; color: var(--text-mid); margin-bottom: 4px; }

    /* 案例网格 */
    .grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
    .case-card { background: white; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); transition: var(--transition); }
    .case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .case-img { height: 200px; overflow: hidden; }
    .case-img img { width: 100%; height: 100%; object-fit: cover; }
    .case-info { padding: 20px; }
    .case-tag { background: rgba(255,107,53,0.1); color: var(--accent); padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; display: inline-block; margin-top: 8px; }

    /* 解决方案图文交替 */
    .solution-row { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
    .solution-row.reverse { flex-direction: row-reverse; }
    .solution-img, .solution-text { flex: 1; }
    .solution-img img { border-radius: var(--radius-lg); box-shadow: var(--shadow-card); width: 100%; }
    .solution-text h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
    .solution-text ul { list-style: none; padding: 0; margin: 16px 0; }
    .solution-text li { padding-left: 20px; position: relative; margin-bottom: 8px; }
    .solution-text li::before { content: ''; position: absolute; left: 0; top: 10px; width: 8px; height: 8px; background: var(--accent); border-radius: 50%; }

    /* FAQ */
    .faq-item { background: white; border-radius: var(--radius-card); margin-bottom: 12px; box-shadow: 0 1px 4px rgba(0,0,0,0.02); transition: var(--transition); }
    .faq-question { padding: 20px 24px; font-weight: 600; font-size: 18px; color: var(--text-dark); display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
    .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; padding: 0 24px; background: #FAFAFA; color: var(--text-body); }
    .faq-item.active .faq-answer { max-height: 200px; padding: 0 24px 20px; }
    .faq-icon { font-size: 20px; color: var(--accent); transition: 0.3s; }

    /* CTA深色区 */
    .cta-dark { background: var(--primary); padding: 100px 0; text-align: center; color: white; }
    .cta-dark h2 { color: white; font-size: 42px; font-weight: 800; }
    .form-inline { display: flex; gap: 16px; justify-content: center; margin-top: 48px; flex-wrap: wrap; }
    .input-underline { background: transparent; border: none; border-bottom: 1px solid rgba(255,255,255,0.4); padding: 12px 8px; color: white; width: 200px; outline: none; transition: 0.3s; }
    .input-underline:focus { border-bottom-color: var(--accent); }
    .input-underline::placeholder { color: rgba(255,255,255,0.5); }

    /* 页脚 */
    .footer { background: #0F1412; color: rgba(255,255,255,0.7); padding: 60px 0 30px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
    .footer-title { color: white; font-weight: 600; margin-bottom: 16px; }
    .footer a { color: rgba(255,255,255,0.6); font-size: 14px; display: block; margin-bottom: 8px; }
    .footer a:hover { color: var(--accent); }
    .copyright { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 40px; padding-top: 20px; text-align: center; font-size: 13px; opacity: 0.5; }

    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2,1fr); }
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .adv-grid { grid-template-columns: 1fr; }
      .solution-row, .solution-row.reverse { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .brand-actions .btn-small { display: none; }
      .hero-content { flex-direction: column; }
      .hero-title { font-size: 36px; }
      .grid-4, .grid-3 { grid-template-columns: 1fr; }
      .form-inline { flex-direction: column; align-items: center; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .channel-nav { justify-content: flex-start; }
    }