/* roulang page: index */
:root {
      --primary: #C87D3A;
      --primary-dark: #8B4F1F;
      --primary-soft: rgba(200, 125, 58, 0.08);
      --bg: #F7F5F2;
      --dark: #1E2126;
      --darker: #14171c;
      --text-heading: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8C8C8C;
      --white: #FFFFFF;
      --border-light: #E5E2DD;
      --success: #2D8C4A;
      --font-digital: 'Oswald', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.05);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.10);
      --radius-sm: 6px;
      --radius-md: 10px;
      --max-width: 1200px;
      --nav-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部信息条 */
    .top-bar {
      background-color: var(--dark);
      color: rgba(255,255,255,0.75);
      font-size: 12px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      letter-spacing: 0.3px;
    }
    .top-bar .ticker {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .top-bar .ticker i {
      color: var(--primary);
      font-size: 14px;
    }
    .top-bar .actions {
      display: flex;
      align-items: center;
      gap: 20px;
      color: rgba(255,255,255,0.8);
    }
    .top-bar .actions span, .top-bar .actions i {
      cursor: pointer;
      transition: color 0.2s;
    }
    .top-bar .actions i:hover {
      color: var(--primary);
    }
    /* 主导航 */
    .main-nav {
      background: rgba(30, 33, 38, 0.92);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 100;
      height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      transition: background 0.25s;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo .graphic {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary) 0%, #6b3a1f 100%);
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      position: relative;
    }
    .logo .wordmark {
      font-weight: 700;
      font-size: 20px;
      letter-spacing: 1px;
      color: white;
    }
    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
      color: #ddd;
      font-weight: 500;
      font-size: 15px;
    }
    .nav-links a {
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-links a:hover, .nav-links a.active {
      color: #fff;
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 10px 24px;
      border-radius: 4px;
      font-weight: 600;
      letter-spacing: 0.5px;
      transition: background 0.25s, transform 0.15s;
      display: inline-block;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .btn-outline {
      border: 1.5px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 10px 24px;
      border-radius: 4px;
      font-weight: 600;
      transition: 0.25s;
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--primary-soft);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: white;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      display: flex;
      min-height: 580px;
      background: radial-gradient(circle at 20% 20%, #2a2e35, #0f1115);
      position: relative;
      overflow: hidden;
    }
    .hero-left {
      flex: 0 0 55%;
      padding: 80px 48px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      z-index: 2;
    }
    .hero-left h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      color: white;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-left .sub {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 32px;
    }
    .badge-group {
      display: flex;
      gap: 32px;
      margin-bottom: 36px;
    }
    .badge .num {
      font-family: var(--font-digital);
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
    }
    .badge .label {
      font-size: 14px;
      color: rgba(255,255,255,0.6);
    }
    .hero-actions {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-right {
      flex: 0 0 45%;
      background: url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      clip-path: polygon(8% 0%, 100% 0%, 100% 100%, 0% 100%);
      position: relative;
      opacity: 0.9;
    }
    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(15,17,21,0.4) 0%, transparent 40%);
    }
    /* 数据带 */
    .data-strip {
      background: #EAE7E2;
      padding: 48px 0;
    }
    .strip-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
    }
    .stat-item .big {
      font-family: var(--font-digital);
      font-size: 44px;
      font-weight: 700;
      color: var(--primary-dark);
    }
    .stat-item .desc {
      color: var(--text-muted);
      font-size: 15px;
    }
    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 38px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 48px;
      height: 3px;
      background: var(--primary);
      margin-top: 12px;
    }
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 36px;
      margin-top: 36px;
    }
    .advantage-item {
      display: flex;
      gap: 18px;
      align-items: flex-start;
    }
    .advantage-item i {
      font-size: 36px;
      color: var(--primary);
      width: 40px;
    }
    .adv-title {
      font-weight: 700;
      font-size: 17px;
      margin-bottom: 6px;
    }
    /* 业务卡片 */
    .filter-bar {
      display: flex;
      justify-content: flex-end;
      gap: 20px;
      margin-bottom: 32px;
    }
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .biz-card {
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: 0.25s;
    }
    .biz-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .biz-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .biz-img .overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
      display: flex;
      align-items: flex-end;
      padding: 20px;
      color: white;
      font-weight: 700;
    }
    /* 对比表 */
    .compare-row {
      display: flex;
      gap: 24px;
      margin-top: 32px;
    }
    .compare-col {
      flex:1;
      background: white;
      border-radius: var(--radius-md);
      padding: 32px;
    }
    .compare-col.highlight {
      border-left: 6px solid var(--primary);
      background: #fffbf5;
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid var(--border-light);
    }
    /* 横向滚动案例 */
    .scroll-cards {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 16px 0 24px;
      scroll-snap-type: x mandatory;
    }
    .case-card {
      flex: 0 0 280px;
      scroll-snap-align: start;
    }
    .case-card img {
      border-radius: var(--radius-sm);
      height: 180px;
      object-fit: cover;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 700;
      display: flex;
      justify-content: space-between;
    }
    /* 联系 */
    .contact-dark {
      background: #2C3038;
      color: white;
    }
    .form-line input, .form-line textarea {
      background: transparent;
      border: none;
      border-bottom: 1px solid rgba(255,255,255,0.4);
      color: white;
      padding: 12px 0;
      width: 100%;
      outline: none;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      color: #bbb;
    }
    @media (max-width: 1024px) {
      .hero { flex-direction: column; }
      .hero-right { height: 320px; clip-path: none; }
      .grid-3x2, .card-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .grid-3x2, .card-grid { grid-template-columns: 1fr; }
      .compare-row { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }