/* roulang page: index */
:root {
      --deep-charcoal: #1E1A2F;
      --champagne-gold: #C8A96E;
      --burgundy-red: #8B2E3E;
      --warm-white: #FAF8F5;
      --soft-gold-light: #FDF9F2;
      --pure-white: #FFFFFF;
      --text-dark: #1E1A2F;
      --text-muted: #5A5565;
      --border-light: rgba(200,169,110,0.15);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.06);
      --shadow-hover: 0 18px 32px rgba(30,26,47,0.1);
      --radius-card: 20px;
      --radius-btn: 50px;
      --radius-sm: 16px;
      --transition: 0.3s ease;
      --max-width: 1280px;
    }

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

    body {
      font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--warm-white);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    button, input {
      font-family: inherit;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 40px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      z-index: 1000;
      background: transparent;
      transition: background 0.3s ease, box-shadow 0.3s ease, color 0.2s;
      color: white;
      backdrop-filter: blur(6px);
    }
    .navbar.scrolled {
      background: rgba(255,255,255,0.96);
      box-shadow: 0 6px 20px rgba(0,0,0,0.05);
      color: var(--deep-charcoal);
      backdrop-filter: blur(12px);
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .nav-logo i {
      color: var(--champagne-gold);
      font-size: 1.8rem;
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      font-weight: 500;
      font-size: 0.95rem;
    }
    .nav-links a {
      opacity: 0.85;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover {
      opacity: 1;
      border-bottom-color: var(--champagne-gold);
    }
    .cta-btn-nav {
      background: var(--champagne-gold);
      color: var(--deep-charcoal);
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      cursor: pointer;
      white-space: nowrap;
      letter-spacing: 0.3px;
      transition: 0.25s;
    }
    .cta-btn-nav:hover {
      background: var(--burgundy-red);
      color: white;
      transform: translateY(-1px);
    }
    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .navbar {
        padding: 0 20px;
        height: 64px;
        background: rgba(30,26,47,0.9);
        color: white;
        backdrop-filter: blur(16px);
      }
      .navbar.scrolled {
        background: rgba(30,26,47,0.95);
      }
      .desktop-only {
        display: none;
      }
      .nav-logo {
        font-size: 1.3rem;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 64px;
        background: white;
        box-shadow: 0 -4px 14px rgba(0,0,0,0.06);
        justify-content: space-around;
        align-items: center;
        z-index: 999;
        padding-bottom: env(safe-area-inset-bottom);
        color: var(--text-muted);
      }
      .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        gap: 4px;
        color: var(--text-muted);
      }
      .mobile-bottom-nav i {
        font-size: 1.25rem;
      }
      .mobile-bottom-nav .active {
        color: var(--champagne-gold);
      }
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #1E1A2F 0%, #231F38 100%);
      position: relative;
      overflow: hidden;
      color: white;
      margin-bottom: 60px;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.2;
      mix-blend-mode: overlay;
    }
    .hero .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 0 0 50%;
    }
    .hero-text h1 {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 20px;
      color: white;
    }
    .hero-text p {
      font-size: 1.2rem;
      color: rgba(200,169,110,0.9);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--champagne-gold);
      color: var(--deep-charcoal);
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: 0.25s;
    }
    .btn-primary:hover {
      background: var(--burgundy-red);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: var(--champagne-gold);
      color: var(--deep-charcoal);
    }
    .hero-badges {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    .badge-item {
      text-align: left;
    }
    .badge-number {
      font-size: 2rem;
      font-weight: 700;
      color: var(--champagne-gold);
    }
    .badge-label {
      font-size: 0.85rem;
      opacity: 0.75;
    }
    @media (max-width: 1024px) {
      .hero .container {
        flex-direction: column;
        text-align: center;
      }
      .hero-text {
        flex: auto;
      }
      .hero-text p {
        margin-left: auto;
        margin-right: auto;
      }
      .hero-badges {
        justify-content: center;
      }
    }
    @media (max-width: 520px) {
      .hero-text h1 {
        font-size: 2.2rem;
      }
    }

    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--deep-charcoal);
    }
    .section-sub {
      color: var(--champagne-gold);
      margin-bottom: 40px;
      font-weight: 500;
    }

    /* 核心优势 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1fr 0.8fr;
      gap: 28px;
    }
    .adv-card {
      background: var(--pure-white);
      padding: 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .adv-icon {
      font-size: 2rem;
      color: var(--champagne-gold);
    }
    @media (max-width: 768px) {
      .advantages-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 功能分组 */
    .feature-row {
      display: flex;
      gap: 40px;
      align-items: flex-start;
    }
    .feature-left h2 {
      font-size: 2rem;
    }
    .feature-cards {
      display: flex;
      flex-direction: column;
      gap: 24px;
      flex:1;
    }
    .feat-item {
      display: flex;
      gap: 20px;
      background: white;
      padding: 24px;
      border-radius: 20px;
      box-shadow: 0 2px 14px rgba(0,0,0,0.03);
    }
    @media (max-width: 768px) {
      .feature-row {
        flex-direction: column;
      }
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .scene-card img {
      border-radius: 16px;
      aspect-ratio: 16/9;
      object-fit: cover;
      transition: 0.3s;
    }
    .scene-card:hover img {
      transform: scale(1.03);
    }
    @media (max-width: 768px) {
      .scene-grid {
        grid-template-columns: 1fr;
      }
    }

    .data-scroll {
      display: flex;
      gap: 28px;
      overflow-x: auto;
      padding-bottom: 12px;
    }
    .data-badge {
      background: white;
      border-radius: 20px;
      padding: 24px;
      min-width: 160px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .data-num {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--champagne-gold);
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .price-card {
      background: white;
      border-radius: 24px;
      padding: 36px 24px;
      box-shadow: var(--shadow-sm);
      transition: 0.3s;
      border: 2px solid transparent;
    }
    .price-card.featured {
      border-color: var(--champagne-gold);
      background: linear-gradient(white, #FDF9F2);
    }
    @media (max-width: 768px) {
      .pricing-grid {
        grid-template-columns: 1fr;
      }
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: white;
      border-radius: 16px;
      padding: 18px 24px;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    .cta-banner {
      background: var(--deep-charcoal);
      text-align: center;
      padding: 70px 20px;
      border-radius: 32px;
      color: white;
    }

    footer {
      background: #1a1725;
      color: #ddd;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }