/* roulang page: index */
:root {
      --deep-black: #0A0E17;
      --lava-orange: #FF4D00;
      --electric-purple: #B347EA;
      --card-bg: rgba(20, 25, 35, 0.8);
      --text-white: #FFFFFF;
      --text-gray: #B0B8C5;
      --border-glow: rgba(255, 77, 0, 0.25);
      --purple-glow: rgba(179, 71, 234, 0.2);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 50px;
      --shadow-card: 0 10px 30px -10px rgba(0,0,0,0.7);
      --shadow-hover: 0 20px 35px -12px rgba(179, 71, 234, 0.3);
      --transition-smooth: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--deep-black);
    }

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--deep-black);
      color: var(--text-gray);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    /* 沉浸式顶部导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: linear-gradient(to bottom, rgba(10,14,23,0.96) 0%, rgba(10,14,23,0.75) 80%, rgba(10,14,23,0) 100%);
      backdrop-filter: blur(8px);
      padding: 15px 0;
      transition: var(--transition-smooth);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: white;
    }

    .logo-icon {
      font-size: 2rem;
      color: var(--lava-orange);
      filter: drop-shadow(0 0 8px rgba(255,77,0,0.6));
    }

    .logo-text {
      font-weight: 800;
      font-size: 1.6rem;
      letter-spacing: -0.3px;
      background: linear-gradient(to right, #fff, #e0e0e0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.2rem;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-gray);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
      padding: 5px 0;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--lava-orange);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--lava-orange);
      transition: width 0.25s;
    }

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

    .btn-login {
      background: linear-gradient(135deg, var(--lava-orange) 0%, var(--electric-purple) 100%);
      border: none;
      color: white;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      cursor: pointer;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 14px rgba(255,77,0,0.4);
      letter-spacing: 0.4px;
    }

    .btn-login:hover {
      filter: brightness(1.2);
      box-shadow: 0 8px 22px rgba(179,71,234,0.5);
      transform: translateY(-1px);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    /* Hero */
    .hero {
      padding: 160px 0 100px;
      display: flex;
      align-items: center;
      min-height: 90vh;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      position: relative;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(179,71,234,0.25) 0%, rgba(10,14,23,0.85) 70%);
    }

    .hero .container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }

    .hero-left h1 {
      font-size: clamp(2.8rem, 6vw, 4.8rem);
      font-weight: 900;
      line-height: 1.15;
      letter-spacing: -0.02em;
      background: linear-gradient(to right, #FF4D00, #FF8C42, #B347EA);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.2rem;
    }

    .hero-sub {
      font-size: 1.4rem;
      font-weight: 600;
      color: white;
      margin-bottom: 1rem;
    }

    .hero-desc {
      font-size: 1.1rem;
      color: #CCD6E0;
      margin-bottom: 2rem;
    }

    .hero-badges {
      display: flex;
      gap: 1.8rem;
      margin-bottom: 2.2rem;
      flex-wrap: wrap;
    }

    .badge {
      background: rgba(179,71,234,0.18);
      backdrop-filter: blur(8px);
      border-radius: 40px;
      padding: 8px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      color: white;
      font-weight: 600;
      border: 1px solid rgba(255,77,0,0.5);
    }

    .badge i {
      color: var(--lava-orange);
    }

    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #FF4D00, #B347EA);
      border: none;
      padding: 16px 38px;
      border-radius: 50px;
      font-weight: 700;
      color: white;
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition-smooth);
      box-shadow: 0 8px 24px rgba(255,77,0,0.45);
    }

    .btn-primary:hover {
      filter: brightness(1.15);
      transform: translateY(-3px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--lava-orange);
      padding: 16px 38px;
      border-radius: 50px;
      font-weight: 600;
      color: white;
      cursor: pointer;
      transition: var(--transition-smooth);
    }

    .btn-outline:hover {
      background: rgba(255,77,0,0.1);
      border-color: #ff8c42;
    }

    .hero-right {
      background: rgba(20,25,35,0.5);
      backdrop-filter: blur(12px);
      border-radius: 32px;
      overflow: hidden;
      border: 1px solid rgba(255,77,0,0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 380px;
    }

    .hero-right img {
      width: 100%;
      height: auto;
      object-fit: cover;
      opacity: 0.9;
    }

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

    .section-title {
      font-size: 2.6rem;
      font-weight: 700;
      color: white;
      margin-bottom: 1rem;
      text-align: center;
    }

    .section-sub {
      color: #B0B8C5;
      text-align: center;
      max-width: 700px;
      margin: 0 auto 3.5rem;
    }

    /* 非对称网格 */
    .features-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 24px;
    }

    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-glow);
      transition: var(--transition-smooth);
    }

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

    .feature-large {
      grid-row: span 2;
    }

    .icon-purple {
      font-size: 2.4rem;
      color: var(--electric-purple);
      margin-bottom: 1rem;
    }

    .feature-card h3 {
      color: white;
      font-size: 1.7rem;
      margin-bottom: 0.8rem;
    }

    .stat-highlight {
      font-family: 'DIN Alternate', sans-serif;
      font-weight: 700;
      font-size: 2rem;
      color: var(--lava-orange);
    }

    /* 瀑布流赛事 */
    .masonry-grid {
      columns: 3;
      column-gap: 24px;
    }

    .tour-card {
      break-inside: avoid;
      background: rgba(20,25,35,0.7);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      overflow: hidden;
      margin-bottom: 24px;
      border: 1px solid rgba(255,77,0,0.15);
      transition: var(--transition-smooth);
    }

    .tour-card:hover {
      border-color: var(--electric-purple);
      transform: translateY(-5px);
    }

    .tour-card img {
      width: 100%;
      display: block;
    }

    .tour-info {
      padding: 1.5rem;
    }

    .prize {
      color: var(--lava-orange);
      font-weight: 700;
      font-size: 1.4rem;
    }

    /* 方案对比表 */
    .plans-table {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .plan-card {
      background: rgba(20,25,35,0.6);
      backdrop-filter: blur(10px);
      border-radius: 24px;
      padding: 2rem 1.5rem;
      border: 1px solid rgba(255,255,255,0.08);
      text-align: center;
      transition: var(--transition-smooth);
    }

    .plan-card.highlight {
      border: 2px solid var(--lava-orange);
      transform: scale(1.03);
      background: rgba(255,77,0,0.08);
    }

    .badge-popular {
      background: var(--lava-orange);
      color: white;
      border-radius: 30px;
      padding: 4px 16px;
      font-size: 0.8rem;
      font-weight: 700;
      display: inline-block;
      margin-bottom: 0.8rem;
    }

    /* FAQ */
    .faq-grid {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: rgba(20,25,35,0.6);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      margin-bottom: 16px;
      padding: 1.2rem 1.8rem;
      border-left: 4px solid var(--electric-purple);
      cursor: pointer;
    }

    .faq-question {
      font-weight: 700;
      color: white;
      display: flex;
      justify-content: space-between;
    }

    /* CTA */
    .cta-band {
      background: linear-gradient(135deg, #0f1219 0%, #1a1025 100%);
      text-align: center;
      border-top: 1px solid rgba(179,71,234,0.3);
      border-bottom: 1px solid rgba(179,71,234,0.3);
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-top: 2.5rem;
      padding-top: 1.8rem;
      text-align: center;
      color: #8892a4;
    }

    @media (max-width: 1024px) {
      .hero .container { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr 1fr; }
      .plans-table { grid-template-columns: repeat(2,1fr); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        width: 100%;
        background: rgba(10,14,23,0.9);
        backdrop-filter: blur(20px);
        justify-content: space-around;
        padding: 12px;
        z-index: 999;
        border-top: 1px solid rgba(255,77,0,0.3);
      }
      .masonry-grid { columns: 2; }
      .features-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }