/* roulang page: index */
:root {
      --primary: #E83A5F;
      --primary-deep: #C92D4A;
      --secondary-dark: #1E1B2E;
      --accent-gold: #F9C74F;
      --bg-warm: #FAF8F5;
      --text-dark: #2D2A3A;
      --text-soft: #5A5568;
      --white: #FFFFFF;
      --gray-light: #F3F1EE;
      --border-light: rgba(30,27,46,0.08);
      --shadow-card: 0 4px 20px rgba(30,27,46,0.06);
      --shadow-hover: 0 8px 32px rgba(30,27,46,0.12);
      --radius-lg: 16px;
      --radius-xl: 24px;
      --radius-pill: 40px;
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --max-width: 1280px;
      --nav-pc-width: 72px;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.75;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      position: relative;
    }
    
    /* 主内容区域考虑PC左侧导航和移动端底部导航 */
    .main-wrapper {
      display: flex;
      flex: 1;
      width: 100%;
      margin-left: 0;
      transition: margin-left 0.2s ease;
    }
    
    .content-area {
      flex: 1;
      width: 100%;
      padding-bottom: 20px;
    }
    
    /* PC左侧沉浸式频道导航 */
    .pc-nav {
      display: none;
      width: var(--nav-pc-width);
      background-color: var(--secondary-dark);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: fixed;
      top: 0;
      left: 0;
      height: 100vh;
      z-index: 1000;
      box-shadow: 4px 0 20px rgba(0,0,0,0.08);
    }
    
    .pc-nav .logo-placeholder {
      margin-bottom: 32px;
      writing-mode: vertical-rl;
      text-orientation: mixed;
      font-weight: 800;
      font-size: 20px;
      color: var(--white);
      letter-spacing: 4px;
      background: linear-gradient(135deg, var(--accent-gold), var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 28px;
      align-items: center;
    }
    
    .nav-item {
      writing-mode: vertical-rl;
      text-orientation: mixed;
    }
    
    .nav-item a {
      display: flex;
      align-items: center;
      gap: 10px;
      color: rgba(255,255,255,0.75);
      text-decoration: none;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 2px;
      position: relative;
      padding: 8px 6px;
      transition: all 0.2s;
      white-space: nowrap;
    }
    
    .nav-item a i {
      font-size: 20px;
      writing-mode: horizontal-tb;
      display: inline-block;
      margin-bottom: 6px;
    }
    
    .nav-item a:hover,
    .nav-item.active a {
      color: var(--accent-gold);
      background: rgba(255,255,255,0.06);
      border-radius: 12px;
    }
    
    .nav-item.active::before {
      content: "";
      position: absolute;
      left: 0;
      top: 10%;
      height: 80%;
      width: 3px;
      background: var(--accent-gold);
      border-radius: 0 4px 4px 0;
    }
    
    /* 移动端底部胶囊导航 */
    .mobile-nav {
      display: flex;
      position: fixed;
      bottom: 16px;
      left: 20px;
      right: 20px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 8px 28px rgba(0,0,0,0.12);
      border-radius: 28px;
      padding: 8px 16px;
      justify-content: space-around;
      z-index: 999;
      border: 1px solid rgba(255,255,255,0.5);
    }
    
    .mobile-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: var(--text-soft);
      text-decoration: none;
      font-size: 11px;
      font-weight: 600;
      transition: all 0.2s;
      padding: 6px 10px;
      border-radius: 24px;
      position: relative;
    }
    
    .mobile-nav a i {
      font-size: 20px;
      margin-bottom: 2px;
    }
    
    .mobile-nav a.active {
      color: var(--primary);
      background: rgba(232, 58, 95, 0.08);
      transform: translateY(-2px);
    }
    
    /* 通用容器 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* Hero */
    #hero {
      padding: 48px 0 60px;
      display: flex;
      align-items: center;
    }
    
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 32px;
      align-items: center;
    }
    
    .hero-left h1 {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      color: var(--secondary-dark);
    }
    
    .dynamic-sub {
      font-size: 1.25rem;
      color: var(--text-soft);
      margin-bottom: 28px;
      min-height: 60px;
    }
    
    .cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      text-decoration: none;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      font-size: 1rem;
    }
    
    .btn-primary {
      background: var(--primary);
      color: white;
      box-shadow: 0 8px 18px rgba(232,58,95,0.3);
    }
    
    .btn-primary:hover {
      background: var(--primary-deep);
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(201,45,74,0.4);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }
    
    .btn-outline:hover {
      background: rgba(232,58,95,0.08);
    }
    
    .btn-gold {
      background: var(--accent-gold);
      color: #2D2A3A;
      font-weight: 700;
    }
    
    .hero-right {
      position: relative;
      height: 370px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .image-stack {
      position: relative;
      width: 100%;
      height: 320px;
    }
    
    .stack-img {
      position: absolute;
      width: 85%;
      height: auto;
      max-height: 260px;
      object-fit: cover;
      border-radius: 24px;
      border: 5px solid white;
      box-shadow: 0 12px 30px rgba(0,0,0,0.1);
    }
    
    .img1 { transform: rotate(-5deg); z-index: 1; left: 5%; top: 5%; }
    .img2 { transform: rotate(4deg); z-index: 2; left: 10%; top: 20%; }
    .img3 { transform: rotate(-2deg); z-index: 3; left: 15%; top: 35%; }
    
    /* 区块标题 */
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 10px;
      position: relative;
      display: inline-block;
    }
    .gold-line {
      width: 56px;
      height: 4px;
      background: var(--accent-gold);
      border-radius: 2px;
      margin-top: 8px;
    みmargin-bottom: 32px;
    }
    
    /* 亮点网格 */
    #highlights {
      padding: 70px 0;
    }
    .highlight-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
    }
    .big-card {
      background: var(--secondary-dark);
      color: white;
      padding: 32px;
      border-radius: var(--radius-lg);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .small-card {
      background: white;
      padding: 28px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: all 0.2s;
    }
    .small-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    /* 对比表 */
    .compare-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 20px;
    }
    .vs-badge {
      background: var(--accent-gold);
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #2D2A3A;
      box-shadow: 0 0 20px rgba(249,199,79,0.5);
      animation: pulse 2s infinite;
    }
    @keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(249,199,79,0.6); } 70% { box-shadow: 0 0 0 15px rgba(249,199,79,0); } 100% { box-shadow: 0 0 0 0 rgba(249,199,79,0); } }
    
    .faq-item {
      background: var(--gray-light);
      border-radius: 12px;
      margin-bottom: 12px;
    }
    
    footer {
      background: var(--secondary-dark);
      color: #ddd;
    }
    
    /* 响应式 */
    @media (min-width: 768px) {
      .hero-grid { grid-template-columns: 55% 45%; }
      .highlight-grid { grid-template-columns: 2fr 1fr 1fr; }
      .pc-nav { display: flex; }
      .main-wrapper { margin-left: var(--nav-pc-width); }
      .mobile-nav { display: none; }
      #hero { padding: 80px 0; }
      .hero-left h1 { font-size: 3.2rem; }
    }
    
    @media (max-width: 767px) {
      .pc-nav { display: none; }
      .mobile-nav { display: flex; }
      .main-wrapper { margin-left: 0; padding-bottom: 80px; }
      .image-stack { height: 280px; }
    }