/* roulang page: index */
:root {
      --primary: #D4380D;
      --primary-deep: #B0300A;
      --gold: #F5A623;
      --dark-bg: #1A1A2E;
      --light-bg: #FAFAFA;
      --card-bg: #FFFFFF;
      --text-main: #333333;
      --text-light: #888888;
      --white: #FFFFFF;
      --border-light: #E0E0E0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --radius-lg: 16px;
      --radius-md: 8px;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      color: var(--text-main);
      background-color: var(--light-bg);
      line-height: 1.8;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 字阶 */
    .heading-xl {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    .heading-lg {
      font-size: 36px;
      font-weight: 600;
      line-height: 1.3;
    }
    .heading-md {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
    }
    .text-body {
      font-size: 16px;
      font-weight: 400;
      color: var(--text-main);
    }
    .text-helper {
      font-size: 14px;
      color: var(--text-light);
    }
    .numeral {
      font-family: "Inter", "Roboto", sans-serif;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    button, .btn {
      cursor: pointer;
      border: none;
      background: transparent;
      font-family: inherit;
    }
    input, textarea {
      font-family: inherit;
      outline: none;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      z-index: 50;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      transition: background 0.3s, backdrop-filter 0.3s;
      background: transparent;
      backdrop-filter: blur(0px);
    }
    .site-header.scrolled {
      background: rgba(26, 26, 46, 0.92);
      backdrop-filter: blur(12px);
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 1px;
    }
    .logo .cloud-icon {
      font-size: 28px;
      color: var(--gold);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: rgba(255,255,255,0.85);
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--white);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-nav-cta {
      background: var(--white);
      color: var(--primary) !important;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      transition: background 0.2s;
      margin-left: 12px;
    }
    .btn-nav-cta:hover {
      background: #f0f0f0;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      z-index: 60;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 2px;
      transition: 0.3s;
    }
    .hamburger .dot {
      width: 6px;
      height: 6px;
      background: var(--gold);
      border-radius: 50%;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 70%;
      max-width: 320px;
      height: 100vh;
      background: var(--dark-bg);
      display: flex;
      flex-direction: column;
      padding: 100px 30px 40px;
      z-index: 55;
      transition: right 0.35s ease;
      gap: 24px;
    }
    .mobile-menu.open {
      right: 0;
    }
    .mobile-menu a {
      color: var(--white);
      font-size: 18px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 12px;
    }
    /* Hero */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(212,56,13,0.8) 0%, rgba(26,26,46,0.92) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      padding-top: 80px;
    }
    .hero-content {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero-text h1 {
      font-size: 52px;
      font-weight: 700;
      color: white;
      line-height: 1.2;
    }
    .gold-word {
      color: var(--gold);
    }
    .hero-sub {
      color: rgba(255,255,245,0.9);
      font-size: 18px;
      margin: 24px 0 32px;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: white;
      color: var(--primary);
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-primary:hover {
      background: var(--primary);
      color: white;
    }
    .btn-outline {
      border: 1px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: white;
      color: var(--primary);
    }
    .hero-card {
      flex: 0 0 300px;
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(16px);
      border-radius: 24px;
      padding: 28px;
      color: white;
    }
    /* 通用区块 */
    .section {
      padding: 100px 0;
    }
    .section-dark {
      background: var(--dark-bg);
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      color: var(--dark-bg);
      display: inline-block;
      padding-bottom: 16px;
      border-bottom: 4px solid var(--gold);
    }
    .section-dark .section-title h2 {
      color: white;
    }
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .stat-card {
      background: rgba(255,255,255,0.07);
      padding: 32px;
      border-radius: var(--radius-lg);
      text-align: center;
      color: white;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--gold);
    }
    .services-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 28px;
    }
    .service-card {
      background: var(--card-bg);
      padding: 36px 28px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      width: 54px;
      margin-bottom: 20px;
    }
    .compare-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .plan-card {
      background: white;
      border-radius: 20px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border: 1px solid #eee;
    }
    .plan-popular {
      border: 2px solid var(--gold);
      transform: scale(1.02);
      position: relative;
    }
    .badge {
      background: var(--gold);
      color: #fff;
      padding: 4px 16px;
      border-radius: 20px;
    }
    .faq-item {
      border-bottom: 1px solid #ddd;
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      cursor: pointer;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .footer {
      background: var(--dark-bg);
      color: #ccc;
      padding: 50px 0 20px;
    }
    @media(max-width:1024px){
      .data-grid{ grid-template-columns:repeat(2,1fr);}
    }
    @media(max-width:768px){
      .nav-links{display:none;}
      .hamburger{display:flex;}
      .hero-content{flex-direction:column; text-align:center;}
      .hero-text h1{font-size:38px;}
      .services-grid{grid-template-columns:1fr;}
      .compare-grid{grid-template-columns:1fr;}
      .contact-grid{grid-template-columns:1fr;}
      .data-grid{grid-template-columns:1fr;}
    }

.form-input{width:100%; padding:14px; margin-bottom:12px; border:1px solid var(--border-light); border-radius:8px;}.price{font-size:2rem;color:var(--primary);margin:10px 0;}