/* roulang page: index */
:root {
      --deep-ocean: #0A1F3F;
      --champagne-gold: #D4AF37;
      --warm-white: #FAF8F5;
      --pure-white: #FFFFFF;
      --text-dark: #3A3A3A;
      --text-muted: #6B6B6B;
      --coral-accent: #C8795C;
      --champagne-dark: #B8962C;
      --border-light: rgba(10,31,63,0.08);
      --shadow-card: 0 4px 20px rgba(10,31,63,0.06);
      --shadow-hover: 0 8px 30px rgba(10,31,63,0.12);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --transition: all 0.3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: var(--warm-white);
      box-shadow: 0 1px 0 var(--border-light);
      z-index: 100;
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 26px;
      color: var(--champagne-gold);
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--deep-ocean);
      letter-spacing: 1px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 6px 0;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--champagne-gold);
      transition: width 0.3s ease;
    }

    .nav-menu a:hover {
      color: var(--deep-ocean);
    }

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

    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--deep-ocean);
      cursor: pointer;
      background: none;
      border: none;
    }

    /* 移动端导航 */
    .mobile-menu {
      display: none;
    }

    @media (max-width: 640px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--deep-ocean);
        flex-direction: column;
        padding: 28px 0;
        gap: 12px;
        z-index: 99;
        display: none;
      }
      .mobile-menu.active {
        display: flex;
      }
      .mobile-menu a {
        color: var(--champagne-gold);
        font-size: 18px;
        padding: 12px 32px;
        border-bottom: 1px solid rgba(212,175,55,0.2);
      }
    }

    /* Hero */
    .hero {
      background: radial-gradient(circle at 20% 30%, #0A1F3F, #04162b);
      padding: 120px 0 80px;
      margin-top: 72px;
      color: white;
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 40px;
      align-items: center;
    }

    .hero-left h1 {
      font-size: 42px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: white;
      margin-bottom: 20px;
      line-height: 1.3;
    }

    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
    }

    .badge-group {
      display: flex;
      gap: 24px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }

    .badge {
      background: rgba(212,175,55,0.15);
      backdrop-filter: blur(4px);
      border-radius: 40px;
      padding: 10px 20px;
      display: flex;
      align-items: baseline;
      gap: 6px;
    }

    .badge-number {
      font-size: 24px;
      font-weight: 700;
      color: var(--coral-accent);
    }

    .badge-label {
      font-size: 14px;
      color: rgba(255,255,255,0.85);
    }

    .btn-primary {
      background: var(--champagne-gold);
      color: var(--deep-ocean);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      display: inline-block;
      font-size: 16px;
      letter-spacing: 1px;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(212,175,55,0.3);
    }

    .btn-primary:hover {
      background: var(--champagne-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(212,175,55,0.4);
      color: var(--deep-ocean);
    }

    .hero-right img {
      border-radius: 24px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-left {
        order: 1;
      }
      .hero-right {
        order: 0;
        margin-bottom: 30px;
      }
      .badge-group {
        justify-content: center;
      }
    }

    /* 通用板块 */
    .section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--deep-ocean);
      margin-bottom: 16px;
      text-align: center;
    }

    .section-sub {
      color: var(--text-muted);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 48px;
      font-size: 17px;
    }

    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card {
      background: var(--pure-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .icon-circle {
      font-size: 28px;
      color: var(--champagne-gold);
      margin-bottom: 20px;
    }

    .card h3 {
      font-size: 22px;
      font-weight: 600;
      color: var(--deep-ocean);
      margin-bottom: 12px;
    }

    .card p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    /* 功能分组 */
    .feature-row {
      display: flex;
      gap: 60px;
      align-items: center;
      margin-bottom: 80px;
    }

    .feature-text {
      flex: 1;
    }

    .feature-text ul {
      list-style: none;
      margin-top: 20px;
    }

    .feature-text li {
      margin-bottom: 16px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 16px;
    }

    .feature-text i {
      color: var(--champagne-gold);
      font-size: 18px;
    }

    .feature-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
    }

    @media (max-width: 768px) {
      .feature-row {
        flex-direction: column;
      }
      .card-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 场景卡片 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scene-card img {
      border-radius: var(--radius-lg) var(--radius-lg) 0 0;
      height: 200px;
      object-fit: cover;
    }

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

    .scene-card h3 {
      padding: 20px 20px 8px;
      font-size: 22px;
    }

    .scene-card p {
      padding: 0 20px 24px;
      color: var(--text-muted);
    }

    /* 案例区 */
    .testimonial-badges {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .case-card {
      background: white;
      border-radius: var(--radius-lg);
      display: flex;
      overflow: hidden;
    }

    .case-card img {
      width: 45%;
      object-fit: cover;
    }

    .case-content {
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    @media (max-width: 768px) {
      .case-grid, .scene-grid {
        grid-template-columns: 1fr;
      }
      .case-card {
        flex-direction: column;
      }
      .case-card img {
        width: 100%;
        height: 180px;
      }
    }

    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      box-shadow: var(--shadow-card);
    }

    .accordion-title {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--deep-ocean);
    }

    .accordion-content {
      padding: 0 24px 20px;
      display: none;
      color: var(--text-dark);
    }

    .accordion-item.active .accordion-content {
      display: block;
    }

    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, #D4AF37 0%, #e6c350 100%);
      padding: 80px 0;
      text-align: center;
      color: var(--deep-ocean);
    }

    .btn-reverse {
      background: var(--deep-ocean);
      color: var(--champagne-gold);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-top: 24px;
      display: inline-block;
    }

    /* 页脚 */
    .footer {
      background: var(--deep-ocean);
      color: #ccc;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }