/* roulang page: index */
:root {
      --deep-ocean: #0B2B40;
      --coral-energy: #F26B3A;
      --coral-deep: #D9562E;
      --sand-warm: #F2E8DC;
      --teal-accent: #00B4A6;
      --white-pure: #FFFFFF;
      --text-primary: #0B2B40;
      --text-secondary: #4A5B66;
      --text-on-dark: #F2E8DC;
      --card-shadow: 0 4px 20px rgba(11, 43, 64, 0.08);
      --card-hover-shadow: 0 12px 32px rgba(11, 43, 64, 0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --transition-smooth: 0.25s ease;
      --font-heading: 'Noto Sans SC', sans-serif;
      --font-body: 'Noto Sans SC', sans-serif;
      --font-number: 'Inter', system-ui, sans-serif;
    }

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

    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.75;
      background-color: var(--sand-warm);
      color: var(--text-primary);
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-body);
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition-smooth);
      font-weight: 600;
    }

    h1, h2, h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-primary);
    }

    h1 {
      font-size: clamp(2.5rem, 6vw, 3.5rem);
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: clamp(2rem, 4.5vw, 2.5rem);
      margin-bottom: 0.75rem;
    }

    h3 {
      font-size: 1.35rem;
      margin-bottom: 0.5rem;
    }

    .section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      .section {
        padding: 64px 0;
      }
    }

    .section-title-wrapper {
      text-align: center;
      margin-bottom: 56px;
    }

    .section-title-wrapper h2 {
      margin-bottom: 8px;
    }

    .decorative-line {
      width: 50px;
      height: 3px;
      background-color: var(--coral-energy);
      margin: 12px auto 16px;
      border-radius: 2px;
    }

    .section-subtitle {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    /* 导航 */
    .main-header {
      background-color: var(--white-pure);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .nav-top-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid rgba(11,43,64,0.08);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--deep-ocean);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--coral-energy);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 15l-5-5 1.41-1.41L11 14.17l7.59-7.59L20 8l-9 9z"/></svg>') no-repeat center;
      mask-size: contain;
      -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 15l-5-5 1.41-1.41L11 14.17l7.59-7.59L20 8l-9 9z"/></svg>') no-repeat center;
      -webkit-mask-size: contain;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      font-size: 1.3rem;
      color: var(--text-primary);
      opacity: 0.7;
    }

    .btn-primary-nav {
      background: var(--coral-energy);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-size: 0.95rem;
      box-shadow: 0 2px 8px rgba(242,107,58,0.3);
    }

    .btn-primary-nav:hover {
      background: var(--coral-deep);
      transform: translateY(-1px);
    }

    .channel-tabs {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 12px 0;
      overflow-x: auto;
      white-space: nowrap;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }

    .channel-tabs::-webkit-scrollbar {
      display: none;
    }

    .tab-pill {
      padding: 8px 20px;
      border-radius: var(--radius-pill);
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-secondary);
      background: transparent;
      transition: all var(--transition-smooth);
    }

    .tab-pill.active, .tab-pill:hover {
      background: var(--deep-ocean);
      color: var(--text-on-dark);
    }

    .hamburger {
      display: none;
      font-size: 1.8rem;
      background: none;
      border: none;
      color: var(--deep-ocean);
    }

    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .channel-tabs {
        gap: 4px;
      }
      .tab-pill {
        padding: 6px 16px;
      }
    }

    /* Hero */
    .hero {
      background-color: var(--sand-warm);
      background-image: radial-gradient(circle at 20% 30%, rgba(0,180,166,0.08) 0%, transparent 40%);
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      right: -10%;
      top: 20%;
      width: 500px;
      height: 500px;
      background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.04"><path d="M20 60 Q50 20 80 60 T20 60" fill="none" stroke="%230B2B40" stroke-width="2"/><path d="M30 70 Q50 40 70 70" fill="none" stroke="%23F26B3A" stroke-width="1.5"/></svg>') no-repeat;
      background-size: contain;
      pointer-events: none;
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 40px;
      min-height: 500px;
    }

    .hero-text {
      flex: 1;
    }

    .hero-text h1 {
      margin-bottom: 20px;
      color: var(--deep-ocean);
    }

    .hero-text p {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--coral-energy);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      box-shadow: 0 4px 14px rgba(242,107,58,0.4);
    }

    .btn-primary:hover {
      background: var(--coral-deep);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--deep-ocean);
      color: var(--deep-ocean);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
    }

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

    .hero-image {
      flex: 1;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(11,43,64,0.2);
    }

    .hero-image img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-text p {
        max-width: 100%;
      }
      .hero-buttons {
        justify-content: center;
      }
    }

    /* 卡片网格 */
    .grid-3, .grid-2 {
      display: grid;
      gap: 28px;
    }

    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }

    .grid-2 {
      grid-template-columns: repeat(2, 1fr);
    }

    @media (max-width: 1024px) {
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
    }

    .card {
      background: var(--white-pure);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: all var(--transition-smooth);
      border-left: 3px solid transparent;
    }

    .card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
      border-left-color: var(--teal-accent);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      color: var(--teal-accent);
      margin-bottom: 20px;
      font-size: 2.5rem;
    }

    .card h3 {
      font-size: 1.4rem;
    }

    .card p {
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .text-link {
      color: var(--coral-energy);
      font-weight: 600;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .text-link:hover {
      text-decoration: underline;
    }

    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 60px;
    }

    .scenario-row.reverse {
      flex-direction: row-reverse;
    }

    .scenario-img {
      flex: 1;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    }

    .scenario-text {
      flex: 1;
    }

    .tag {
      background: rgba(0,180,166,0.12);
      color: var(--teal-accent);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 12px;
    }

    @media (max-width: 768px) {
      .scenario-row, .scenario-row.reverse {
        flex-direction: column;
      }
    }

    /* 案例卡片 */
    .metric-number {
      font-family: var(--font-number);
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--teal-accent);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .metric-dot {
      width: 10px;
      height: 10px;
      background: var(--teal-accent);
      border-radius: 50%;
      display: inline-block;
    }

    /* 价格卡片 */
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--card-shadow);
      text-align: center;
      position: relative;
      transition: all var(--transition-smooth);
    }

    .pricing-card.featured {
      border-top: 4px solid var(--coral-energy);
      transform: scale(1.02);
    }

    .badge-recommend {
      background: var(--coral-energy);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }

    .price {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--deep-ocean);
    }

    .feature-list {
      list-style: none;
      text-align: left;
      margin: 24px 0;
    }

    .feature-list li {
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .check-green {
      color: var(--teal-accent);
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      background: white;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #F7F3EE;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 20px 24px;
    }

    .faq-item.active .faq-question {
      border-left: 3px solid var(--coral-energy);
    }

    /* 全局CTA */
    .cta-banner {
      background: var(--deep-ocean);
      padding: 80px 0;
      text-align: center;
      color: white;
      background-image: linear-gradient(rgba(11,43,64,0.9), rgba(11,43,64,0.95)), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
    }

    .cta-banner h2 {
      color: white;
    }

    .btn-light-outline {
      border: 2px solid var(--text-on-dark);
      color: var(--text-on-dark);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      background: transparent;
      font-weight: 600;
    }

    .btn-light-outline:hover {
      background: var(--text-on-dark);
      color: var(--deep-ocean);
    }

    /* 页脚 */
    .footer {
      background: var(--deep-ocean);
      color: var(--text-on-dark);
      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;
      }
    }