/* roulang page: index */
:root {
      --bg-deep: #0D0D0D;
      --gold: #C8A96E;
      --gold-light: #E2C990;
      --red-accent: #D32F2F;
      --carbon: #1A1A1A;
      --smoke: #2E2E2E;
      --warm-white: #F5F0E8;
      --text-primary: #F5F0E8;
      --text-secondary: #B7AFA7;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-card: 0 10px 25px -8px rgba(0,0,0,0.7);
      --shadow-hover: 0 20px 35px -10px rgba(200,169,110,0.2);
      --transition: 0.25s ease;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
      --font-mono: 'Oswald', 'Inter', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 导航杂志频道风格 */
    header {
      background-color: rgba(13,13,13,0.92);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid var(--smoke);
    }
    .brand-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 0;
    }
    .logo {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 2px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .logo i {
      font-size: 1.5rem;
      color: var(--gold-light);
    }
    .nav-channel-row {
      display: flex;
      gap: 0;
      padding: 0.5rem 0 0;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
      border-top: 1px solid rgba(200,169,110,0.15);
    }
    .nav-channel-row a {
      padding: 0.75rem 1.2rem;
      font-size: 0.9rem;
      font-weight: 500;
      letter-spacing: 0.5px;
      color: var(--text-secondary);
      position: relative;
      transition: color var(--transition);
      text-transform: uppercase;
    }
    .nav-channel-row a.active {
      color: var(--gold);
    }
    .nav-channel-row a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 2px;
      background: var(--gold);
    }
    .nav-channel-row a:hover {
      color: var(--gold-light);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--gold);
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .nav-channel-row {
        display: none;
        flex-direction: column;
        background: var(--carbon);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--smoke);
      }
      .nav-channel-row.open {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .brand-row {
        padding: 0.8rem 0;
      }
    }
    /* Hero暗夜竞技场 */
    #hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 5rem 0;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 5% 20%, rgba(13,13,13,0.65) 0%, #0D0D0D 95%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-left h1 {
      font-family: var(--font-serif);
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-primary);
      margin-bottom: 1.5rem;
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    .hero-left .sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2.5rem;
      max-width: 90%;
    }
    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-gold {
      background: var(--gold);
      color: #0D0D0D;
      font-weight: 600;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-sm);
      transition: all var(--transition);
      border: none;
      cursor: pointer;
      letter-spacing: 0.3px;
    }
    .btn-gold:hover {
      background: var(--gold-light);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      padding: 0.8rem 2rem;
      border-radius: var(--radius-sm);
      font-weight: 500;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: rgba(200,169,110,0.1);
      border-color: var(--gold-light);
    }
    .hero-right {
      display: flex;
      justify-content: center;
    }
    .hero-visual {
      width: 100%;
      max-width: 480px;
      aspect-ratio: 1/0.9;
      background: rgba(26,26,26,0.65);
      border: 1px solid var(--smoke);
      border-radius: var(--radius-md);
      backdrop-filter: blur(10px);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }
    .hero-visual img {
      opacity: 0.9;
      border-radius: var(--radius-md);
    }
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-left .sub {
        max-width: 100%;
      }
      .btn-group {
        justify-content: center;
      }
      .hero-right {
        order: -1;
      }
    }
    /* 板块通用 */
    section {
      padding: 5rem 0;
    }
    .section-title {
      font-family: var(--font-serif);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 1rem;
      position: relative;
    }
    .section-sub {
      color: var(--text-secondary);
      margin-bottom: 3rem;
      font-size: 1.1rem;
    }
    /* 亮点网格三列偏移 */
    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2rem;
    }
    .highlight-card {
      background: var(--carbon);
      border: 1px solid var(--smoke);
      border-radius: var(--radius-md);
      padding: 2.2rem 1.5rem;
      transition: all var(--transition);
      text-align: center;
    }
    .highlight-card:hover {
      border-color: var(--gold);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      border: 2px solid var(--gold);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      font-size: 1.8rem;
      color: var(--gold);
    }
    @media (max-width: 768px) {
      .highlight-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 特色瀑布流交替 */
    .feature-waterfall {
      display: flex;
      flex-direction: column;
      gap: 4rem;
    }
    .feature-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2.5rem;
      align-items: center;
    }
    .feature-item.reverse {
      direction: rtl;
    }
    .feature-item.reverse .feature-text {
      direction: ltr;
    }
    .feature-img {
      background: var(--carbon);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--smoke);
    }
    .feature-text h3 {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      margin-bottom: 1rem;
    }
    .feature-text p {
      color: var(--text-secondary);
      margin-bottom: 1.5rem;
    }
    .text-link {
      color: var(--gold);
      font-weight: 500;
      border-bottom: 1px solid transparent;
      transition: border var(--transition);
    }
    .text-link:hover {
      border-bottom: 1px solid var(--gold);
    }
    @media (max-width: 768px) {
      .feature-item, .feature-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
      }
    }
    /* 数据看板 */
    .stats-board {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .stat-item {
      padding: 1.5rem;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.1;
    }
    .stat-label {
      color: var(--text-secondary);
      margin-top: 0.5rem;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    @media (max-width: 768px) {
      .stats-board {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    /* FAQ双列手风琴 */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }
    .faq-item {
      background: var(--carbon);
      border: 1px solid var(--smoke);
      border-radius: var(--radius-md);
      padding: 1.2rem 1.5rem;
      cursor: pointer;
      transition: background var(--transition);
    }
    .faq-item.active {
      background: #1f1f1f;
      border-color: var(--gold);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 1rem;
    }
    @media (max-width: 768px) {
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }
    /* CTA悬浮卡片 */
    .cta-banner {
      background: #0D0D0D;
      position: relative;
      padding: 4rem 0;
    }
    .cta-card {
      background: var(--carbon);
      border: 1px solid var(--gold);
      border-radius: var(--radius-md);
      padding: 3rem;
      max-width: 600px;
      margin: 0 auto;
      text-align: center;
      box-shadow: 0 0 40px rgba(200,169,110,0.15);
    }
    .cta-input {
      display: flex;
      gap: 1rem;
      margin-top: 2rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .cta-input input {
      background: #2C2C2C;
      border: 1px solid var(--smoke);
      padding: 0.8rem 1.2rem;
      border-radius: var(--radius-sm);
      color: white;
      width: 240px;
    }
    footer {
      border-top: 1px solid var(--smoke);
      padding: 2rem 0;
      color: var(--text-secondary);
      font-size: 0.9rem;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .fade-up {
      opacity: 0;
      transform: translateY(25px);
      transition: 0.6s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }