/* roulang page: index */
:root {
      --primary: #0F2642;
      --primary-dark: #0B1A2D;
      --primary-light: #1A3D68;
      --accent: #C29D59;
      --accent-hover: #A8833E;
      --accent-light: #F9F5EC;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #111827;
      --text-body: #374151;
      --text-muted: #6B7280;
      --border-color: #E2E8F0;
      --border-focus: #C29D59;
      --shadow-sm: 0 2px 8px rgba(15, 38, 66, 0.04);
      --shadow-card: 0 4px 20px -2px rgba(15, 38, 66, 0.06);
      --shadow-hover: 0 16px 32px -4px rgba(15, 38, 66, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部通栏 */
    .top-bar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 0.85rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .top-info {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .top-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-info i {
      color: var(--accent);
    }

    /* 主导航 */
    .main-header {
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .logo-badge {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #FFF;
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      border: 1px solid var(--accent);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-menu li a {
      font-weight: 500;
      color: var(--text-main);
      font-size: 0.95rem;
      position: relative;
      padding: 6px 0;
    }

    .nav-menu li a:hover,
    .nav-menu li a.active {
      color: var(--accent);
    }

    .nav-menu li a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: width 0.25s ease;
    }

    .nav-menu li a:hover::after,
    .nav-menu li a.active::after {
      width: 100%;
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 22px;
      background-color: var(--accent);
      color: #FFF;
      font-weight: 600;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(194, 157, 89, 0.3);
    }

    .nav-cta:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-gold {
      background-color: var(--accent);
      color: #FFF;
      box-shadow: 0 6px 20px rgba(194, 157, 89, 0.35);
    }

    .btn-gold:hover {
      background-color: var(--accent-hover);
      color: #FFF;
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFF;
    }

    .btn-outline:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFF;
    }

    .btn-navy {
      background-color: var(--primary);
      color: #FFF;
    }

    .btn-navy:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    /* 板块通用 */
    .section {
      padding: 85px 0;
      position: relative;
    }

    .section-dark {
      background-color: var(--primary-dark);
      color: #E2E8F0;
    }

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 55px;
    }

    .section-tag {
      display: inline-block;
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 12px;
      background: var(--accent-light);
      padding: 4px 14px;
      border-radius: 20px;
    }

    .section-dark .section-tag {
      background: rgba(194, 157, 89, 0.15);
    }

    .section-title {
      font-size: 2.15rem;
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-dark .section-title {
      color: #FFF;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块1：Hero 首屏（对比选型，推荐档高亮卡片前置） */
    .hero-section {
      position: relative;
      background-color: var(--primary-dark);
      background-image: linear-gradient(135deg, rgba(11, 26, 45, 0.95), rgba(15, 38, 66, 0.9)), url('/assets/images/f622d4b70db69400.webp');
      background-size: cover;
      background-position: center;
      color: #FFF;
      padding: 90px 0 100px;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .hero-h1 {
      font-size: 2.65rem;
      line-height: 1.25;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-lead {
      font-size: 1.05rem;
      color: #CBD5E1;
      margin-bottom: 30px;
      line-height: 1.75;
    }

    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      margin-bottom: 35px;
    }

    .hero-badge-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
    }

    .hero-badge-item i {
      color: var(--accent);
    }

    /* 对比选型推荐卡片（前置） */
    .plan-compare-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
      backdrop-filter: blur(12px);
    }

    .plan-card-featured {
      background: #FFFFFF;
      color: var(--text-main);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
      border: 2px solid var(--accent);
      position: relative;
    }

    .featured-ribbon {
      position: absolute;
      top: -14px;
      right: 20px;
      background: var(--accent);
      color: #FFF;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      box-shadow: 0 4px 10px rgba(194, 157, 89, 0.4);
    }

    .plan-header {
      margin-bottom: 20px;
    }

    .plan-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
    }

    .plan-tagline {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .plan-features-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .plan-features-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.92rem;
      margin-bottom: 12px;
      color: var(--text-body);
    }

    .plan-features-list li i {
      color: #10B981;
      margin-top: 4px;
    }

    /* 板块2：机构与体系介绍 (#about) */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-img-wrap {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .about-img-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .about-content h3 {
      font-size: 1.65rem;
      color: var(--primary);
      margin-bottom: 18px;
    }

    .about-text {
      margin-bottom: 20px;
      color: var(--text-body);
    }

    .about-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-top: 24px;
    }

    .about-point-item {
      display: flex;
      gap: 12px;
    }

    .about-point-item i {
      color: var(--accent);
      font-size: 1.25rem;
      margin-top: 4px;
    }

    .about-point-item h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .about-point-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 板块3：核心优势六宫格 (#advantages) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .adv-card {
      background: var(--bg-white);
      padding: 32px 26px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .adv-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }

    .adv-icon {
      width: 54px;
      height: 54px;
      background: var(--accent-light);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 1.45rem;
      margin-bottom: 20px;
    }

    .adv-card h3 {
      font-size: 1.2rem;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .adv-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块4：核心业务矩阵 (#services) */
    .service-card {
      background: #FFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      transition: transform 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
    }

    .service-thumb {
      height: 200px;
      overflow: hidden;
    }

    .service-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .service-card:hover .service-thumb img {
      transform: scale(1.05);
    }

    .service-body {
      padding: 28px 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .service-body h3 {
      font-size: 1.25rem;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .service-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 18px;
    }

    .service-meta-list {
      list-style: none;
      margin-top: auto;
      padding-top: 15px;
      border-top: 1px dashed var(--border-color);
    }

    .service-meta-list li {
      font-size: 0.86rem;
      color: var(--text-body);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .service-meta-list li i {
      color: var(--accent);
      font-size: 0.75rem;
    }

    /* 板块5：攻防策略对比 (#defense-concept) */
    .concept-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .concept-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 34px;
    }

    .concept-box.highlight {
      border-color: var(--accent);
      background: rgba(194, 157, 89, 0.08);
    }

    .concept-box h3 {
      font-size: 1.35rem;
      color: #FFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .concept-box h3 i {
      color: var(--accent);
    }

    .concept-box p {
      color: #94A3B8;
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .concept-items {
      list-style: none;
    }

    .concept-items li {
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.92rem;
      color: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    /* 板块6：实战案例 (#cases) */
    .grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .case-card {
      background: #FFF;
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent);
    }

    .case-tag-bar {
      display: flex;
      gap: 10px;
      margin-bottom: 14px;
    }

    .case-tag {
      background: var(--bg-light);
      color: var(--primary);
      font-size: 0.8rem;
      padding: 3px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    .case-card h3 {
      font-size: 1.25rem;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .case-desc {
      font-size: 0.92rem;
      color: var(--text-body);
      margin-bottom: 16px;
    }

    .case-result {
      background: var(--accent-light);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      color: var(--primary);
      font-weight: 500;
    }

    /* 板块7：核心业务数据条 */
    .metrics-bar-section {
      background: var(--primary);
      color: #FFF;
      padding: 48px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }

    .metric-item .num {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .metric-item .label {
      font-size: 0.95rem;
      color: #CBD5E1;
    }

    /* 板块8：客户评价与口碑 */
    .review-card {
      background: #FFF;
      padding: 28px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
    }

    .review-stars {
      color: #F59E0B;
      font-size: 0.88rem;
      margin-bottom: 14px;
    }

    .review-quote {
      font-size: 0.94rem;
      color: var(--text-body);
      margin-bottom: 20px;
      flex-grow: 1;
      font-style: italic;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 15px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .reviewer-info h4 {
      font-size: 0.95rem;
      color: var(--primary);
    }

    .reviewer-info p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 板块9：资讯与证据指南 (#trends) */
    .trend-card {
      background: #FFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }

    .trend-thumb {
      height: 180px;
    }

    .trend-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .trend-body {
      padding: 24px;
      flex-grow: 1;
    }

    .trend-date {
      font-size: 0.82rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .trend-body h3 {
      font-size: 1.15rem;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .trend-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 板块10：FAQ 疑难解答 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFF;
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.02rem;
    }

    .faq-question i {
      color: var(--accent);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-body);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    /* 板块11：服务承诺保障条 */
    .guarantees-bar {
      background: var(--bg-white);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
    }

    .guarantees-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .guarantee-item i {
      font-size: 2rem;
      color: var(--accent);
    }

    .guarantee-item h4 {
      font-size: 1rem;
      color: var(--primary);
      margin-bottom: 2px;
    }

    .guarantee-item p {
      font-size: 0.84rem;
      color: var(--text-muted);
    }

    /* 板块12：底部咨询与需求提报 (#contact) */
    .contact-card-box {
      background: #FFF;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      padding: 45px;
      border: 1px solid var(--border-color);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }

    .contact-info-panel h3 {
      font-size: 1.6rem;
      color: var(--primary);
      margin-bottom: 14px;
    }

    .contact-info-panel p {
      color: var(--text-muted);
      margin-bottom: 24px;
      font-size: 0.95rem;
    }

    .direct-list {
      list-style: none;
    }

    .direct-list li {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 18px;
      font-size: 0.96rem;
      color: var(--text-main);
    }

    .direct-list li i {
      width: 36px;
      height: 36px;
      background: var(--accent-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(194, 157, 89, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 底部固定转化条 */
    .sticky-bottom-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 38, 66, 0.96);
      backdrop-filter: blur(10px);
      color: #FFF;
      padding: 12px 0;
      z-index: 999;
      box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
      border-top: 1px solid rgba(194, 157, 89, 0.3);
    }

    .sticky-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .sticky-bar-text {
      display: flex;
      align-items: center;
      gap: 15px;
      font-size: 0.95rem;
    }

    .sticky-bar-text i {
      color: var(--accent);
      font-size: 1.25rem;
    }

    .sticky-bar-btn {
      padding: 8px 24px;
      background: var(--accent);
      color: #FFF;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
    }

    .sticky-bar-btn:hover {
      background: var(--accent-hover);
    }

    /* 页脚 */
    .footer {
      background-color: var(--primary-dark);
      color: #94A3B8;
      padding: 70px 0 90px; /* 留出底部悬浮条高度 */
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      color: #FFF;
      font-size: 1.25rem;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 15px;
    }

    .footer-links h5,
    .footer-contact h5 {
      color: #FFF;
      font-size: 1.05rem;
      margin-bottom: 18px;
    }

    .footer-links ul {
      list-style: none;
    }

    .footer-links ul li {
      margin-bottom: 10px;
    }

    .footer-links ul li a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .about-grid,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantees-grid,
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .grid-3,
      .grid-2,
      .concept-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .guarantees-grid,
      .metrics-grid {
        grid-template-columns: 1fr;
        text-align: left;
      }
      .contact-card-box {
        padding: 24px;
      }
      .sticky-bar-text span {
        display: none;
      }
    }