/* roulang page: index */
/* 设计变量 */
    :root {
      --primary: #E60012;
      --primary-dark: #B8000F;
      --secondary-dark: #1A1A2E;
      --gold: #D4A843;
      --gold-light: #F0E6C8;
      --bg: #F5F5F7;
      --card-bg: #FFFFFF;
      --text-main: #1A1A2E;
      --text-sub: #5C5C6E;
      --text-white: #FFFFFF;
      --border-light: #E8E8EC;
      --shadow-card: 0 2px 12px rgba(26,26,46,0.06);
      --shadow-card-hover: 0 8px 28px rgba(230,0,18,0.12);
      --shadow-btn: 0 4px 16px rgba(230,0,18,0.3);
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --radius-pill: 24px;
      --spacing-section: 100px;
      --spacing-card: 32px;
      --grid-gap: 24px;
      --max-width: 1200px;
      --header-height: 72px;
      --font-zh: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-en: "Inter", "Poppins", sans-serif;
    }
    
    /* 基础重置 */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      font-family: var(--font-zh);
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, input, textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
      border: none;
    }
    
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航 */
    #header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(10px);
      height: var(--header-height);
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(0,0,0,0.05);
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }
    
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .logo i {
      font-size: 1.8rem;
      color: var(--gold);
    }
    
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    
    .nav-links a {
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 0;
      position: relative;
      font-size: 0.95rem;
    }
    
    .nav-links a:hover {
      color: var(--primary);
    }
    
    .nav-links a.active {
      color: var(--primary);
      border-bottom: 3px solid var(--primary);
    }
    
    .hamburger {
      display: none;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--text-main);
    }
    
    /* 首屏 Hero */
    #hero {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      position: relative;
      overflow: hidden;
      padding: 80px 0;
      color: var(--text-white);
    }
    
    #hero::before {
      content: "";
      position: absolute;
      top: -50%;
      right: -20%;
      width: 700px;
      height: 700px;
      background: radial-gradient(circle, rgba(212,168,67,0.15) 0%, transparent 70%);
      border-radius: 50%;
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 2;
    }
    
    .hero-left {
      flex: 1 1 55%;
    }
    
    .hero-right {
      flex: 1 1 45%;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    
    .hero-badge {
      display: inline-flex;
      align-items: center;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-pill);
      padding: 8px 20px;
      font-size: 0.9rem;
      margin-bottom: 24px;
      border: 1px solid rgba(255,255,255,0.25);
    }
    
    h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    
    .hero-sub {
      font-size: 1.1rem;
      color: rgba(255,255,255,0.9);
      margin-bottom: 32px;
      max-width: 480px;
    }
    
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--gold) 100%);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-block;
      box-shadow: 0 4px 12px rgba(230,0,18,0.2);
    }
    
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-btn);
      filter: brightness(1.05);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.25s;
    }
    
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: var(--gold);
    }
    
    .hero-image {
      width: 100%;
      border-radius: var(--radius-lg);
      object-fit: cover;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
    }
    
    .badge-row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .badge-capsule {
      background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
      color: var(--secondary-dark);
      border-radius: var(--radius-pill);
      padding: 10px 20px;
      font-weight: 700;
      font-family: var(--font-en);
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    
    .badge-capsule span {
      font-size: 0.8rem;
      font-weight: 500;
      color: #3a2e1e;
    }
    
    /* 通用板块 */
    section {
      padding: var(--spacing-section) 0;
    }
    
    .section-title {
      text-align: center;
      margin-bottom: 56px;
    }
    
    h2 {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    
    .section-desc {
      color: var(--text-sub);
      max-width: 600px;
      margin: 0 auto;
    }
    
    /* 亮点 Highlights */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--grid-gap);
    }
    
    .highlight-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: var(--spacing-card);
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
      border-top: 4px solid var(--primary);
      text-align: center;
    }
    
    .highlight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-top-color: var(--gold);
    }
    
    .highlight-icon {
      font-size: 2.2rem;
      color: var(--gold);
      margin-bottom: 16px;
    }
    
    .highlight-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary);
      font-family: var(--font-en);
    }
    
    .highlight-label {
      color: var(--text-sub);
      font-size: 0.9rem;
      margin-top: 8px;
    }
    
    /* 案例瀑布 Showcase */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--grid-gap);
    }
    
    .showcase-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: 0.3s;
    }
    
    .showcase-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    
    .showcase-img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      transition: transform 0.4s;
    }
    
    .showcase-card:hover .showcase-img {
      transform: scale(1.03);
    }
    
    .showcase-content {
      padding: 20px;
    }
    
    .tag {
      background: var(--primary);
      color: white;
      font-size: 0.75rem;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-bottom: 8px;
    }
    
    h3 {
      font-size: 1.3rem;
      font-weight: 600;
      margin-bottom: 8px;
    }
    
    /* 对比表 */
    .compare-table {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    
    .table-row {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
    }
    
    .table-header {
      background: var(--secondary-dark);
      color: white;
      font-weight: 600;
      padding: 16px 20px;
    }
    
    .table-cell {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      display: flex;
      align-items: center;
    }
    
    .feature-name {
      font-weight: 600;
    }
    
    .check-gold {
      color: var(--gold);
      font-size: 1.2rem;
    }
    
    .cross-gray {
      color: #aaa;
    }
    
    .recommended {
      background: #FFF9F0;
    }
    
    .badge-recommend {
      background: var(--gold);
      color: #1A1A2E;
      font-size: 0.7rem;
      padding: 2px 10px;
      border-radius: 20px;
      margin-left: 8px;
    }
    
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    
    .faq-question {
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.1rem;
    }
    
    .faq-icon {
      transition: transform 0.3s;
      color: var(--primary);
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.2s;
      color: var(--text-sub);
    }
    
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    
    /* 联系 CTA */
    #contact {
      background: var(--secondary-dark);
      color: white;
    }
    
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    
    .contact-form input, .contact-form textarea {
      width: 100%;
      padding: 14px;
      margin-bottom: 16px;
      border-radius: var(--radius-sm);
      background: white;
      color: var(--text-main);
    }
    
    .contact-info i {
      color: var(--gold);
      margin-right: 10px;
    }
    
    /* 页脚 */
    footer {
      background: #0F0F1A;
      color: #aaa;
      padding: 48px 0 24px;
      border-top: 4px solid var(--primary);
    }
    
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
    }
    
    /* 响应式 */
    @media (max-width: 1024px) {
      .highlights-grid { grid-template-columns: repeat(2, 1fr); }
      .showcase-grid { grid-template-columns: repeat(2, 1fr); }
      .table-row { grid-template-columns: 1fr; display: block; }
      .table-header { display: none; }
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; background: white; width: 100%; padding: 20px; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
      .nav-links.active { display: flex; }
      .hamburger { display: block; }
      .hero-grid { flex-direction: column; }
      .highlights-grid { grid-template-columns: 1fr; }
      .showcase-grid { grid-template-columns: 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
      h1 { font-size: 2.2rem; }
    }