/* roulang page: index */
:root {
      --primary: #E8453C;
      --primary-dark: #B83227;
      --accent-gold: #C9A96E;
      --bg-dark: #0D0F14;
      --bg-dark-light: #1A1C23;
      --text-main: #1A1C23;
      --text-muted: #6B7280;
      --bg-card: #F4F5F7;
      --white: #FFFFFF;
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-btn: 50px;
      --shadow-card: 0 8px 30px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 40px rgba(0,0,0,0.12);
      --transition: 0.3s ease;
      --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --container-max: 1280px;
      --section-gap: 100px;
    }

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

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

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 700;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

    h1, h2, h3 {
      font-weight: 800;
      line-height: 1.3;
    }

    h1 {
      font-size: 44px;
      font-weight: 900;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    h3 {
      font-size: 22px;
      font-weight: 700;
    }

    .section-title {
      margin-bottom: 48px;
    }

    .section-title h2 {
      color: var(--bg-dark);
    }

    .section-title p {
      color: var(--text-muted);
      font-size: 18px;
      margin-top: 8px;
    }

    /* 按钮系统 */
    .btn-primary {
      background: var(--primary);
      color: var(--white);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-size: 16px;
      font-weight: 700;
      box-shadow: 0 4px 12px rgba(232,69,60,0.3);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 6px 18px rgba(184,50,39,0.4);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      font-size: 16px;
      font-weight: 700;
    }

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

    .btn-white {
      background: var(--white);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 700;
      font-size: 16px;
    }

    .btn-white:hover {
      background: #f0f0f0;
      transform: translateY(-2px);
    }

    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: transparent;
      transition: background 0.3s, backdrop-filter 0.3s;
    }

    .main-header.scrolled {
      background: rgba(13,15,20,0.85);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 24px;
      max-width: var(--container-max);
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 800;
      color: var(--white);
      letter-spacing: 1px;
    }

    .logo-icon {
      font-size: 28px;
      color: var(--accent-gold);
      filter: drop-shadow(0 0 6px rgba(201,169,110,0.6));
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 600;
      font-size: 15px;
      position: relative;
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .nav-cta {
      background: var(--primary);
      color: var(--white) !important;
      padding: 10px 24px;
      border-radius: 40px;
      font-weight: 700;
    }

    .nav-cta:hover {
      background: var(--primary-dark);
    }

    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 16px;
      left: 16px;
      right: 16px;
      background: rgba(13,15,20,0.92);
      backdrop-filter: blur(16px);
      border-radius: 40px;
      padding: 8px 16px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
      z-index: 110;
      justify-content: space-around;
    }

    .mobile-nav a {
      color: rgba(255,255,255,0.7);
      font-size: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      padding: 6px 8px;
      border-radius: 30px;
      transition: 0.2s;
    }

    .mobile-nav a i {
      font-size: 18px;
    }

    .mobile-nav a.active {
      color: var(--primary);
      background: rgba(255,255,255,0.1);
    }

    /* 各板块通用间距 */
    section {
      padding: var(--section-gap) 0;
    }

    /* Hero */
    .hero {
      background: radial-gradient(circle at 30% 20%, #1A1C23 0%, #0D0F14 100%);
      color: var(--white);
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-badge-group {
      display: flex;
      gap: 20px;
      margin: 28px 0 32px;
    }

    .badge {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(6px);
      border-radius: 40px;
      padding: 8px 20px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255,255,255,0.15);
    }

    .badge span {
      color: var(--accent-gold);
      font-size: 20px;
      font-weight: 900;
    }

    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      height: 420px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }

    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(232,69,60,0.25) 0%, rgba(13,15,20,0.7) 100%);
    }

    /* 优势不对称网格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .adv-card-large {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .adv-card-small {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .data-badge {
      color: var(--primary);
      font-weight: 900;
      font-size: 28px;
    }

    /* 方案网格 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: var(--transition);
    }

    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .solution-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }

    /* 瀑布流案例 */
    .cases-masonry {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .case-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
      background: #eee;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

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

    .case-img {
      height: 240px;
      background-size: cover;
    }

    .case-overlay {
      background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
      padding: 20px;
      color: white;
      position: absolute;
      bottom: 0;
      width: 100%;
    }

    .gold-badge {
      background: var(--accent-gold);
      color: #0D0F14;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
    }

    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      gap: 16px;
    }

    .step-item {
      text-align: center;
      flex: 1;
    }

    .step-circle {
      width: 60px;
      height: 60px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 24px;
      margin: 0 auto 16px;
    }

    /* 对比表 */
    .compare-table {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .col-highlight {
      border-left: 4px solid var(--primary);
      background: #fff9f9;
    }

    .table-header {
      background: #0D0F14;
      color: white;
      padding: 24px;
      font-weight: 800;
    }

    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }

    .faq-question {
      padding: 20px;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #E8453C 0%, #B83227 100%);
      color: white;
      text-align: center;
      border-radius: 0;
    }

    .footer {
      background: #0D0F14;
      color: #ccc;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 36px; }
      .hero-grid { gap: 32px; }
    }

    @media (max-width: 768px) {
      .main-header .nav-links { display: none; }
      .mobile-nav { display: flex; }
      .hero-grid { grid-template-columns: 1fr; }
      .hero-image { height: 300px; order: -1; }
      .advantages-grid { grid-template-columns: 1fr; }
      .solutions-grid, .cases-masonry { grid-template-columns: 1fr; }
      .compare-table { grid-template-columns: 1fr; overflow-x: auto; }
      .process-steps { flex-wrap: wrap; }
    }