/* roulang page: index */
:root {
      --brand-red: #E8453C;
      --brand-red-dark: #D6342A;
      --deep-blue: #1A1A2E;
      --deep-blue-dark: #141428;
      --soft-gray: #F5F5F7;
      --gold: #FFB800;
      --white: #FFFFFF;
      --text-dark: #1A1A2E;
      --text-mid: #333333;
      --text-light: #CCCCCC;
      --text-muted: #999999;
      --border-light: #E0E0E0;
      --border-card: #EEEEEE;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-btn: 10px;
      --transition: 0.25s ease;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --container-max: 1200px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-heading);
      background-color: var(--white);
      color: var(--text-dark);
      margin: 0;
      padding: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    .container-custom {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航栏 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(26, 26, 46, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      transition: background 0.3s ease;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--brand-red);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13.5 5.5c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2zM18 10c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm-9 0c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm9 5c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zM4.5 5.5c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2z"/></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="M13.5 5.5c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2zM18 10c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm-9 0c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm9 5c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zM4.5 5.5c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2z"/></svg>') no-repeat center;
      -webkit-mask-size: contain;
    }

    .logo-text {
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 2px;
      line-height: 1;
    }

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

    .nav-links a {
      color: var(--white);
      font-weight: 500;
      font-size: 16px;
      transition: color var(--transition);
      white-space: nowrap;
    }

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

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .cta-button {
      background: var(--brand-red);
      color: var(--white);
      padding: 10px 24px;
      border-radius: 6px;
      font-weight: 600;
      transition: all var(--transition);
      white-space: nowrap;
      font-size: 15px;
    }

    .cta-button:hover {
      background: #ff5a4f;
      transform: scale(1.03);
      color: var(--white);
    }

    .online-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      color: #4ade80;
      font-size: 13px;
      font-weight: 500;
      background: rgba(255,255,255,0.1);
      padding: 4px 12px;
      border-radius: 20px;
    }

    .online-dot {
      width: 8px;
      height: 8px;
      background: #4ade80;
      border-radius: 50%;
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.2); }
      100% { opacity: 1; transform: scale(1); }
    }

    .hamburger {
      display: none;
      color: white;
      font-size: 28px;
      cursor: pointer;
    }

    /* Hero */
    .hero-section {
      padding: 120px 0 80px;
      background: linear-gradient(135deg, #1A1A2E 0%, #2c2c44 100%);
      min-height: 85vh;
      display: flex;
      align-items: center;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }

    .hero-left {
      flex: 0 0 55%;
    }

    .hero-right {
      flex: 1;
      position: relative;
    }

    .hero-title {
      font-size: 52px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--white);
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
      line-height: 1.6;
    }

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

    .data-badge {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 16px 24px;
      color: white;
    }

    .badge-number {
      font-size: 30px;
      font-weight: 700;
      color: var(--gold);
      display: block;
    }

    .badge-label {
      font-size: 14px;
      opacity: 0.85;
    }

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

    .btn-primary {
      background: var(--brand-red);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-primary:hover {
      background: #ff5a4f;
      transform: scale(1.03);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
    }

    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      color: white;
    }

    .hero-image {
      width: 100%;
      border-radius: 24px;
      object-fit: cover;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      aspect-ratio: 4/3;
    }

    .image-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(232,69,60,0.2) 0%, transparent 70%);
      border-radius: 24px;
      pointer-events: none;
    }

    /* 通用板块 */
    .section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 38px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--deep-blue);
    }

    .title-underline {
      width: 60px;
      height: 3px;
      background: var(--brand-red);
      margin: 0 auto 48px;
    }

    /* 核心优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid var(--border-card);
    }

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

    .feature-icon {
      font-size: 40px;
      color: var(--brand-red);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .feature-desc {
      color: #555;
      margin-bottom: 16px;
    }

    .micro-stat {
      font-size: 14px;
      font-weight: 600;
      color: var(--brand-red);
      border-left: 3px solid var(--brand-red);
      padding-left: 12px;
    }

    /* 服务瀑布流 */
    .service-masonry {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .service-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }

    .service-info {
      padding: 20px;
    }

    .service-tag {
      background: var(--gold);
      color: #1A1A2E;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 12px;
    }

    .left-offset {
      margin-top: 30px;
    }

    /* 方案对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: start;
    }

    .plan-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-card);
      text-align: center;
      transition: all 0.3s;
    }

    .plan-highlight {
      border: 2px solid var(--brand-red);
      transform: scale(1.02);
      position: relative;
    }

    .popular-badge {
      background: var(--gold);
      color: #1A1A2E;
      font-weight: 700;
      padding: 6px 18px;
      border-radius: 20px;
      font-size: 14px;
      display: inline-block;
      margin-bottom: 16px;
    }

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

    .plan-list li {
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .plan-list i {
      color: var(--brand-red);
    }

    /* 案例 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
    }

    .case-card {
      min-width: 280px;
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-card img {
      height: 200px;
      object-fit: cover;
    }

    .case-info {
      padding: 16px;
    }

    .big-number {
      font-size: 28px;
      font-weight: 700;
      color: var(--brand-red);
    }

    /* FAQ */
    .accordion-item {
      background: white;
      border-bottom: 1px solid var(--border-light);
    }

    .accordion-title {
      font-weight: 600;
      padding: 18px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #FAFAFA;
      padding: 0 16px;
    }

    .accordion-item.active .accordion-content {
      max-height: 200px;
      padding: 16px;
    }

    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, #E8453C, #1A1A2E);
      text-align: center;
      padding: 80px 20px;
      color: white;
    }

    .footer-dark {
      background: #1A1A2E;
      color: #CCCCCC;
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1fr;
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr 1fr; }
      .pricing-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta .online-badge { display: none; }
      .hamburger { display: block; }
      .hero-title { font-size: 36px; }
      .service-masonry { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }