/* roulang page: index */
:root {
      --primary: #0B2F3A;
      --primary-dark: #06181E;
      --primary-light: #164e5f;
      --accent: #FF5E1F;
      --accent-hover: #e04b10;
      --bg-light: #F4F7F6;
      --bg-white: #FFFFFF;
      --text-main: #1D2D35;
      --text-muted: #5C6E75;
      --border: #DDE5E4;
      --card-shadow: 0 4px 20px rgba(11, 47, 58, 0.06);
      --card-shadow-hover: 0 8px 30px rgba(11, 47, 58, 0.12);
      --radius: 6px;
      --radius-lg: 12px;
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .text-center { text-align: center; }
    .badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.5px;
    }
    .badge-accent {
      background: rgba(255, 94, 31, 0.12);
      color: var(--accent);
    }
    .badge-primary {
      background: rgba(11, 47, 58, 0.08);
      color: var(--primary);
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
      margin-top: 12px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 14px auto 0;
      line-height: 1.7;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.2s ease;
      white-space: nowrap;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(255, 94, 31, 0.35);
    }
    .btn-outline {
      border-color: var(--border);
      color: var(--primary);
      background: #fff;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--bg-light);
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.3);
      color: #fff;
      background: transparent;
    }
    .btn-outline-white:hover {
      border-color: #fff;
      background: rgba(255, 255, 255, 0.1);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: #fff;
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }
    .topline-bar {
      background: var(--primary-dark);
      color: #9cb1b8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .topline-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .main-nav-bar {
      padding: 16px 0;
    }
    .main-nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .brand-logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.5px;
    }
    .brand-logo span {
      background: var(--primary);
      color: #fff;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 14px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
    }
    .nav-links a:hover {
      color: var(--accent);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 优惠券墙 Hero */
    .hero-section {
      background: linear-gradient(135deg, rgba(11, 47, 58, 0.95), rgba(6, 24, 30, 0.92)), url('/assets/images/9a7ce10122194df4.webp') center/cover no-repeat;
      color: #fff;
      padding: 80px 0 100px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      color: #ffffff;
    }
    .hero-content p {
      font-size: 17px;
      line-height: 1.8;
      color: #d1dede;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-tags {
      display: flex;
      gap: 20px;
      font-size: 13px;
      color: #9cb1b8;
    }
    .hero-tags span {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 优惠券墙组件 */
    .coupon-wall {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      backdrop-filter: blur(10px);
    }
    .coupon-wall-header {
      font-size: 14px;
      color: #a4c0c7;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .main-coupon-card {
      background: #ffffff;
      color: var(--primary-dark);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
      overflow: hidden;
      margin-bottom: 16px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.3);
      border-left: 6px solid var(--accent);
    }
    .main-coupon-card::before, .main-coupon-card::after {
      content: '';
      position: absolute;
      width: 18px;
      height: 18px;
      background: var(--primary-dark);
      border-radius: 50%;
      top: 50%;
      transform: translateY(-50%);
    }
    .main-coupon-card::before { left: -9px; }
    .main-coupon-card::after { right: -9px; }
    .coupon-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      background: rgba(255, 94, 31, 0.12);
      padding: 2px 8px;
      border-radius: 3px;
      margin-bottom: 8px;
    }
    .coupon-value {
      font-size: 34px;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .coupon-value small {
      font-size: 14px;
      font-weight: normal;
      color: var(--text-muted);
    }
    .coupon-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin: 8px 0 16px;
    }
    .sub-coupon-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .sub-coupon-item {
      background: rgba(255, 255, 255, 0.08);
      border: 1px dashed rgba(255, 255, 255, 0.2);
      border-radius: var(--radius);
      padding: 12px 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .sub-coupon-item h4 {
      font-size: 14px;
      color: #fff;
    }
    .sub-coupon-item p {
      font-size: 12px;
      color: #9cb1b8;
    }
    .sub-coupon-btn {
      color: var(--accent);
      background: #fff;
      border: none;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: bold;
      cursor: pointer;
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-dark {
      background-color: var(--primary-dark);
      color: #fff;
    }
    .section-dark .section-title {
      color: #fff;
    }
    .section-dark .section-desc {
      color: #9cb1b8;
    }

    /* 1. KPI看板 */
    .kpi-board {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: -40px;
      position: relative;
      z-index: 10;
    }
    .kpi-card {
      background: #fff;
      padding: 28px;
      border-radius: var(--radius);
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border);
    }
    .kpi-num {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      font-feature-settings: "tnum";
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .kpi-num span {
      font-size: 18px;
      color: var(--accent);
    }
    .kpi-label {
      font-size: 15px;
      font-weight: 600;
      margin: 12px 0 6px;
      color: var(--text-main);
    }
    .kpi-detail {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 2. 服务矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--card-shadow);
      transition: transform 0.2s ease, border-color 0.2s ease;
      display: flex;
      flex-direction: column;
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
    }
    .matrix-tag {
      font-size: 12px;
      background: var(--bg-light);
      color: var(--primary);
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 14px;
    }
    .matrix-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .matrix-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .matrix-footer {
      border-top: 1px dashed var(--border);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    .matrix-footer span {
      color: var(--text-muted);
    }
    .matrix-footer a {
      color: var(--accent);
      font-weight: 600;
    }

    /* 3. 结果对比看板 */
    .compare-container {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .compare-head {
      display: grid;
      grid-template-columns: 240px 1fr 1fr;
      background: var(--primary);
      color: #fff;
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
    }
    .compare-row {
      display: grid;
      grid-template-columns: 240px 1fr 1fr;
      padding: 22px 24px;
      border-bottom: 1px solid var(--border);
      align-items: center;
    }
    .compare-row:last-child { border-bottom: none; }
    .compare-row:nth-child(even) {
      background-color: var(--bg-light);
    }
    .compare-dim {
      font-weight: 600;
      color: var(--primary);
      font-size: 15px;
    }
    .compare-trad {
      color: var(--text-muted);
      font-size: 14px;
      padding-right: 20px;
    }
    .compare-plat {
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      padding-right: 20px;
    }
    .compare-plat em {
      font-style: normal;
      color: var(--accent);
    }

    /* 4. 履约里程碑 */
    .milestone-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .milestone-step {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-idx {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. 标杆案例 */
    .case-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .case-media img {
      border-radius: var(--radius-lg);
      box-shadow: 0 12px 36px rgba(0,0,0,0.25);
    }
    .case-specs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin: 24px 0;
    }
    .spec-item {
      background: rgba(255, 255, 255, 0.06);
      padding: 16px;
      border-radius: var(--radius);
      border-left: 3px solid var(--accent);
    }
    .spec-item h5 {
      font-size: 13px;
      color: #9cb1b8;
      margin-bottom: 4px;
    }
    .spec-item p {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
    }

    /* 6. 热门选型卡片 */
    .product-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .prod-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .prod-card-body {
      padding: 24px;
    }
    .prod-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .prod-meta {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.5;
    }
    .prod-standards {
      list-style: none;
      border-top: 1px solid var(--border);
      padding-top: 12px;
      margin-bottom: 18px;
    }
    .prod-standards li {
      font-size: 13px;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .prod-standards li::before {
      content: '✓';
      color: var(--accent);
      font-weight: bold;
    }

    /* 7. 采供指南与资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .news-item img {
      height: 190px;
      object-fit: cover;
      width: 100%;
    }
    .news-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-heading {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
    }

    /* 8. 平台合规保障体系 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guar-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
    }
    .guar-icon {
      font-size: 32px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .guar-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .guar-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 客户口碑与证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .testi-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
      flex-grow: 1;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }
    .testi-info h4 {
      font-size: 15px;
      color: var(--primary);
    }
    .testi-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 快速解答与常见问题 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-quest {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
      border: none;
      width: 100%;
      text-align: left;
    }
    .faq-quest::after {
      content: '+';
      font-size: 20px;
      color: var(--accent);
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-quest::after {
      content: '−';
    }
    .faq-ans {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-ans {
      display: block;
    }

    /* 11. 集中询价表单转化区 */
    .inquiry-box {
      background: #fff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      box-shadow: 0 10px 40px rgba(0,0,0,0.06);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      overflow: hidden;
    }
    .inquiry-info {
      background: var(--primary);
      color: #fff;
      padding: 48px;
    }
    .inquiry-info h3 {
      font-size: 26px;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .inquiry-info p {
      font-size: 14px;
      color: #b0c9cf;
      line-height: 1.7;
      margin-bottom: 32px;
    }
    .contact-item {
      margin-bottom: 16px;
      font-size: 14px;
    }
    .contact-item strong {
      display: block;
      color: #fff;
      margin-bottom: 4px;
    }
    .inquiry-form {
      padding: 48px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(255, 94, 31, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 12. 页脚信誉系统 */
    .site-footer {
      background: var(--primary-dark);
      color: #a8bec3;
      padding: 60px 0 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h3 {
      font-size: 20px;
      color: #fff;
      margin-bottom: 14px;
      font-weight: 800;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background: var(--accent);
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #728a90;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .matrix-grid, .news-grid, .product-cards, .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
      .kpi-board, .guarantee-grid, .milestone-timeline { grid-template-columns: repeat(2, 1fr); }
      .case-grid, .inquiry-box { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-links.active { display: flex; }
      .nav-actions { display: none; }
      .topline-inner { flex-direction: column; gap: 4px; text-align: center; }
      .hero-content h1 { font-size: 32px; }
      .hero-actions { flex-direction: column; }
      .matrix-grid, .news-grid, .product-cards, .testimonial-grid, .kpi-board, .guarantee-grid, .milestone-timeline, .footer-grid { grid-template-columns: 1fr; }
      .compare-head, .compare-row { grid-template-columns: 1fr; gap: 8px; }
      .compare-head div:first-child, .compare-row .compare-dim { font-weight: 800; }
      .sub-coupon-list { grid-template-columns: 1fr; }
      .inquiry-info, .inquiry-form { padding: 24px; }
    }