/* roulang page: index */
:root {
      --deep-purple: #180524;
      --dark-bg: #0F0A1A;
      --card-bg: rgba(30, 10, 46, 0.7);
      --neon-pink: #E91E63;
      --neon-pink-light: #FF4081;
      --gold: #C9A96E;
      --gold-dim: rgba(201, 169, 110, 0.3);
      --white: #ffffff;
      --gray-light: #e0e0e0;
      --gray-mid: #b0b0b0;
      --gray-dark: #6c6c6c;
      --border-pink: rgba(233, 30, 99, 0.35);
      --border-gold: rgba(201, 169, 110, 0.25);
      --shadow-neon: 0 0 20px rgba(233, 30, 99, 0.25);
      --shadow-card: 0 8px 28px rgba(0,0,0,0.5);
      --radius-card: 16px;
      --radius-btn: 8px;
      --font-sans: 'Inter', 'Rajdhani', '思源黑体', '阿里巴巴普惠体', 'Helvetica Neue', sans-serif;
      --transition: 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--dark-bg);
      color: var(--gray-light);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--white);
      margin-bottom: 0.75rem;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 导航 */
    .k1-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(15, 10, 26, 0.75);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-pink);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }
    .k1-nav.scrolled {
      background: #0F0A1A;
      box-shadow: 0 4px 20px rgba(0,0,0,0.7);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 1.5rem;
      max-width: 1300px;
      margin: 0 auto;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--neon-pink);
      text-shadow: 0 0 8px var(--neon-pink);
    }
    .logo-text {
      font-weight: 700;
      font-size: 1.7rem;
      letter-spacing: 1px;
      color: white;
    }
    .logo-text span {
      color: var(--neon-pink);
    }
    .desktop-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .desktop-links a {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 4px;
    }
    .desktop-links a:hover,
    .desktop-links a.active {
      color: var(--neon-pink);
    }
    .desktop-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--neon-pink);
      transition: width 0.25s ease;
    }
    .desktop-links a:hover::after,
    .desktop-links a.active::after {
      width: 100%;
    }
    .btn-nav {
      background: var(--neon-pink);
      color: white !important;
      padding: 0.5rem 1.4rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 0 14px rgba(233,30,99,0.5);
    }
    .btn-nav:hover {
      background: var(--neon-pink-light);
      box-shadow: 0 0 22px var(--neon-pink);
    }
    .mobile-toggle {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .desktop-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
    }

    /* Hero */
    .hero {
      height: 100vh;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at center, rgba(24,5,36,0.4) 0%, #0F0A1A 90%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      padding: 0 1.5rem;
    }
    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4.5rem);
      font-weight: 800;
      letter-spacing: 2px;
      text-shadow: 0 0 30px rgba(233,30,99,0.6);
    }
    .hero h1 .highlight {
      color: var(--neon-pink);
      text-shadow: 0 0 25px var(--neon-pink);
    }
    .hero-sub {
      font-size: 1.3rem;
      color: rgba(255,255,255,0.75);
      margin: 1.2rem 0 2rem;
    }
    .hero-btns {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--neon-pink);
      color: white;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      border: none;
      box-shadow: var(--shadow-neon);
      transition: var(--transition);
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--neon-pink-light);
      box-shadow: 0 0 30px var(--neon-pink);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--neon-pink);
      color: var(--neon-pink);
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(233,30,99,0.15);
      border-color: var(--neon-pink-light);
      color: white;
    }
    .scroll-indicator {
      position: absolute;
      bottom: 25px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--neon-pink);
      font-size: 1.8rem;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0);}
      40%{transform:translateX(-50%) translateY(-8px);}
      60%{transform:translateX(-50%) translateY(-4px);}
    }

    /* 通用区块 */
    section {
      padding: 5rem 0;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 60px;
      height: 4px;
      background: var(--neon-pink);
      border-radius: 2px;
    }

    /* 服务卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
      margin-top: 2rem;
    }
    .service-card {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-pink);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: all 0.3s ease;
      box-shadow: 0 6px 18px rgba(0,0,0,0.5);
    }
    .service-card:hover {
      transform: translateY(-6px);
      border-color: var(--neon-pink);
      box-shadow: 0 0 28px rgba(233,30,99,0.3);
    }
    .card-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .card-body {
      padding: 1.5rem;
    }
    .card-body h3 {
      font-size: 1.5rem;
      margin-bottom: 0.5rem;
    }
    .gold-line {
      width: 40px;
      height: 3px;
      background: var(--gold);
      margin: 0.8rem 0;
    }

    /* 优势数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
      text-align: center;
    }
    .stat-item .stat-number {
      font-family: 'Rajdhani', sans-serif;
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--neon-pink);
    }
    .stat-label {
      color: var(--gray-mid);
    }

    /* 案例卡片横向 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
    }
    .case-card {
      background: var(--card-bg);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius-card);
      padding: 1.2rem;
      display: flex;
      gap: 1rem;
      align-items: center;
    }
    .case-thumb {
      width: 80px;
      height: 80px;
      border-radius: 12px;
      background-size: cover;
    }
    .badge-gold {
      background: rgba(201,169,110,0.2);
      color: var(--gold);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* FAQ */
    .faq-item {
      background: rgba(30,10,46,0.65);
      border: 1px solid var(--border-gold);
      border-radius: 12px;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .faq-question {
      padding: 1.2rem 1.8rem;
      font-weight: 700;
      color: white;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      background: transparent;
      transition: background 0.2s;
    }
    .faq-answer {
      padding: 0 1.8rem 1.2rem;
      color: var(--gray-mid);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* 联系表单 */
    .contact-form input,
    .contact-form textarea {
      background: #1a1025;
      border: 1px solid var(--border-pink);
      color: white;
      border-radius: 8px;
      padding: 0.8rem;
    }
    .contact-form input:focus,
    .contact-form textarea:focus {
      border-color: var(--neon-pink);
      box-shadow: 0 0 10px rgba(233,30,99,0.3);
    }
    footer {
      background: #0a0512;
      border-top: 1px solid var(--gold-dim);
      padding: 2rem 0;
    }

    @media (max-width: 1024px) {
      .service-grid, .case-grid { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .service-grid, .case-grid, .stats-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.5rem; }
    }