/* roulang page: index */
:root {
      --primary: #FF4C29;
      --primary-hover: #E63A1C;
      --secondary-bg: #1A1C29;
      --accent-gold: #FFD700;
      --text-white: #FFFFFF;
      --text-body: #B0B3C7;
      --text-muted: #6C6F82;
      --card-bg: #242736;
      --card-border: #3A3D52;
      --footer-bg: #0F111A;
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 100px;
      --shadow-card: 0 20px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,76,41,0.2);
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--secondary-bg);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 双层导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: rgba(26, 28, 41, 0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(58, 61, 82, 0.5);
    }

    .brand-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.75rem 0;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-white);
      letter-spacing: -0.02em;
    }
    .logo span {
      color: var(--primary);
    }

    .brand-actions {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }
    .search-icon {
      font-size: 1.3rem;
      color: var(--text-white);
      cursor: pointer;
      transition: var(--transition);
    }
    .search-icon:hover {
      color: var(--primary);
    }
    .cta-btn {
      background: linear-gradient(135deg, #FF4C29, #FF6A4B);
      color: white;
      border: none;
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 8px 20px rgba(255,76,41,0.3);
    }
    .cta-btn:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
    }

    .channel-tabs {
      display: flex;
      gap: 0.5rem;
      padding-bottom: 0.8rem;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
      scrollbar-color: var(--primary) transparent;
    }
    .channel-tabs::-webkit-scrollbar {
      height: 4px;
    }
    .channel-tabs::-webkit-scrollbar-thumb {
      background: var(--primary);
      border-radius: 4px;
    }
    .pill {
      padding: 0.4rem 1.5rem;
      border-radius: var(--radius-pill);
      font-weight: 500;
      font-size: 0.9rem;
      border: 1px solid var(--card-border);
      color: var(--text-body);
      background: transparent;
      transition: var(--transition);
      cursor: pointer;
    }
    .pill.active, .pill:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: white;
    }

    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      gap: 3rem;
      padding: 4rem 0 5rem;
    }
    .hero-left {
      flex: 1;
    }
    .hero-left h1 {
      font-size: clamp(2.8rem, 6vw, 4.5rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-white);
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    .gradient-text {
      background: linear-gradient(to right, #fff, #B0B3C7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .subtitle-rotator {
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 1.5rem;
      min-height: 2.5rem;
    }
    .hero-desc {
      font-size: 1.1rem;
      margin-bottom: 2rem;
      max-width: 500px;
    }
    .hero-btns {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 0.7rem 2rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: white;
      color: var(--secondary-bg);
    }
    .hero-right {
      flex: 1;
      position: relative;
    }
    .hero-img {
      width: 100%;
      border-radius: 80px 20px 80px 20px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .hero-img img {
      object-fit: cover;
      width: 100%;
      height: auto;
    }
    .floating-badge {
      position: absolute;
      background: var(--accent-gold);
      color: #1A1C29;
      font-weight: 700;
      padding: 0.5rem 1.2rem;
      border-radius: 50px;
      font-size: 0.9rem;
      box-shadow: 0 10px 25px rgba(255,215,0,0.4);
      animation: float 3s ease-in-out infinite;
    }
    .badge-1 { top: 10%; right: -5%; }
    .badge-2 { bottom: 15%; left: -5%; animation-delay: 1.2s; }

    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0); }
    }

    /* 亮点网格 1大2小 */
    .highlights {
      padding: 4rem 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 0.5rem;
    }
    .grid-uneven {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 1.5rem;
      margin-top: 2.5rem;
    }
    .large-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .small-stack {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .small-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
    }
    .highlight-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 1rem;
    }
    .data-badge {
      background: var(--accent-gold);
      color: #1A1C29;
      display: inline-block;
      padding: 0.25rem 1rem;
      border-radius: 50px;
      font-weight: 700;
      font-size: 0.85rem;
      margin-top: 0.8rem;
    }

    /* 案例瀑布流 */
    .cases {
      padding: 4rem 0;
    }
    .masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
      margin-top: 2.5rem;
    }
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--card-border);
      transition: var(--transition);
    }
    .case-card:hover {
      border-color: var(--primary);
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
    }
    .case-img {
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    .case-info {
      padding: 1.2rem;
    }
    .odds-tag {
      background: var(--primary);
      color: white;
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 对比 */
    .comparison {
      padding: 4rem 0;
    }
    .vs-grid {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-top: 2.5rem;
    }
    .vs-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 2rem;
      flex: 1;
    }
    .vs-divider {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      margin: 1rem 0;
    }

    /* FAQ */
    .faq {
      padding: 4rem 0;
    }
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      margin-top: 2rem;
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 1.2rem;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-question {
      font-weight: 700;
      color: white;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      color: var(--text-body);
      margin-top: 0.8rem;
      display: none;
      border-left: 4px solid var(--primary);
      padding-left: 1rem;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 页脚 */
    .footer {
      background: var(--footer-bg);
      padding: 2.5rem 0;
      text-align: center;
    }
    .social i {
      font-size: 1.6rem;
      margin: 0 0.8rem;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .social i:hover { color: white; }

    @media (max-width: 1024px) {
      .hero { flex-direction: column; }
      .grid-uneven { grid-template-columns: 1fr; }
      .masonry { grid-template-columns: repeat(2, 1fr); }
      .faq-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .masonry { grid-template-columns: 1fr; }
      .vs-grid { flex-direction: column; }
      .brand-row { flex-wrap: wrap; }
      .channel-tabs { gap: 0.3rem; }
    }