/* roulang page: index */
/* 基础重置与设计变量 */
    :root {
      --bg-deep: #060B1A;
      --bg-primary: #0A0E27;
      --bg-card: #0D1530;
      --color-cyan: #00F0FF;
      --color-cyan-dark: #0088CC;
      --color-red: #FF4655;
      --text-light: #E6F0FA;
      --text-muted: #B0C4DE;
      --text-dim: #6B7B8D;
      --border-cyan: rgba(0, 240, 255, 0.15);
      --shadow-cyan: 0 0 18px rgba(0, 240, 255, 0.6);
      --shadow-cyan-hover: 0 0 28px rgba(0, 240, 255, 0.85);
      --glass-bg: rgba(10, 30, 50, 0.45);
      --glass-border: 1px solid rgba(0, 240, 255, 0.15);
      --radius-card: 16px;
      --radius-btn: 30px;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --spacing-section: 100px;
      --spacing-card-padding: 28px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-muted);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-sans);
      color: white;
      margin-bottom: 0.5rem;
    }

    h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.25rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.375rem;
      font-weight: 600;
      line-height: 1.4;
      color: white;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    a {
      color: var(--color-cyan);
      transition: all 0.25s ease;
      text-decoration: none;
    }

    a:hover {
      color: white;
      text-shadow: 0 0 8px rgba(0,240,255,0.5);
    }

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

    button, .button {
      cursor: pointer;
      font-family: var(--font-sans);
    }

    /* 导航组件：资讯门户吸顶式 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(6, 11, 26, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      transition: background 0.3s;
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.7rem 2rem;
      flex-wrap: wrap;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--color-cyan);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 1px;
      text-shadow: 0 0 12px rgba(0,240,255,0.5);
    }

    .logo i {
      font-size: 2rem;
      color: var(--color-cyan);
    }

    .hot-tags {
      display: flex;
      align-items: center;
      gap: 1.2rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .hot-tags span {
      background: rgba(0, 240, 255, 0.08);
      padding: 0.2rem 0.9rem;
      border-radius: 20px;
      color: var(--color-cyan);
      border: 1px solid var(--border-cyan);
    }

    .search-icon {
      color: var(--color-cyan);
      font-size: 1.3rem;
      margin-left: 0.5rem;
    }

    .nav-anchors {
      display: flex;
      justify-content: center;
      gap: 2.2rem;
      padding: 0.5rem 1rem 0.8rem;
      flex-wrap: wrap;
      background: transparent;
    }

    .nav-anchors a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 4px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .nav-anchors a.active {
      color: var(--color-cyan);
      border-bottom: 2px solid var(--color-cyan);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--color-cyan);
      font-size: 1.8rem;
    }

    /* Hero 首屏 */
    .hero {
      height: 100vh;
      background: linear-gradient(135deg, rgba(10,14,39,0.7) 0%, rgba(6,11,26,0.9) 70%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      text-align: center;
      padding-top: 120px;
    }

    .hero-content {
      max-width: 900px;
      padding: 0 20px;
    }

    .hero h1 {
      font-size: 3.8rem;
      margin-bottom: 1.2rem;
      background: linear-gradient(to right, #fff, var(--color-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: none;
    }

    .hero .subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 2.5rem;
    }

    .btn-cyan-glow {
      background: linear-gradient(135deg, var(--color-cyan), var(--color-cyan-dark));
      border: none;
      color: #0A0E27;
      font-weight: 700;
      padding: 0.9rem 2.5rem;
      border-radius: var(--radius-btn);
      box-shadow: var(--shadow-cyan);
      transition: all 0.3s;
      font-size: 1.1rem;
      margin: 0 0.8rem;
      display: inline-block;
    }

    .btn-cyan-glow:hover {
      box-shadow: var(--shadow-cyan-hover);
      transform: translateY(-2px);
      color: white;
    }

    .btn-ghost {
      background: transparent;
      border: 2px solid var(--color-cyan);
      color: var(--color-cyan);
      font-weight: 600;
      padding: 0.85rem 2.3rem;
      border-radius: var(--radius-btn);
      transition: 0.3s;
      margin: 0 0.8rem;
    }

    .btn-ghost:hover {
      background: rgba(0,240,255,0.1);
      box-shadow: 0 0 15px rgba(0,240,255,0.4);
      color: white;
    }

    .scroll-hint {
      position: absolute;
      bottom: 30px;
      color: var(--color-cyan);
      font-size: 2rem;
      animation: bounce 2s infinite;
    }

    @keyframes bounce {
      0%,100%{transform:translateY(0);} 50%{transform:translateY(-10px);}
    }

    /* 板块通用 */
    .section {
      padding: var(--spacing-section) 0;
    }

    .section-dark {
      background-color: var(--bg-primary);
    }

    .section-title {
      margin-bottom: 3rem;
      position: relative;
    }

    .section-title h2 {
      display: inline-block;
      border-left: 5px solid var(--color-cyan);
      padding-left: 20px;
    }

    /* 痛点卡片 */
    .pain-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: 0 8px 20px rgba(0,0,0,0.4);
      height: 100%;
    }

    .pain-icon {
      font-size: 2.2rem;
      color: var(--color-cyan);
      margin-bottom: 1rem;
    }

    /* 解决方案玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border: var(--glass-border);
      border-radius: var(--radius-card);
      padding: var(--spacing-card-padding);
      box-shadow: 0 8px 32px rgba(0,0,0,0.5);
      transition: all 0.3s ease;
      height: 100%;
    }

    .glass-card:hover {
      transform: translateY(-6px);
      border-color: rgba(0,240,255,0.45);
      box-shadow: 0 12px 35px rgba(0,240,255,0.25);
    }

    .icon-circle {
      background: rgba(0,240,255,0.1);
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      color: var(--color-cyan);
      margin-bottom: 1.4rem;
    }

    /* 数据块 */
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      background: linear-gradient(to right, var(--color-cyan), #fff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .testimonial-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      border: var(--glass-border);
      border-radius: var(--radius-card);
      padding: 2rem;
    }

    /* FAQ 手风琴 */
    .accordion-item {
      margin-bottom: 1rem;
      border-radius: 12px;
      overflow: hidden;
    }

    .accordion-title {
      background: rgba(10,30,50,0.6);
      padding: 1rem 1.5rem;
      font-weight: 600;
      color: white;
      border: 1px solid transparent;
      transition: 0.2s;
    }

    .accordion-title:hover {
      background: rgba(0,240,255,0.08);
    }

    .is-active .accordion-title {
      border-color: var(--color-cyan);
      background: rgba(0,240,255,0.12);
    }

    .accordion-content {
      background: rgba(6,11,26,0.8);
      color: #CCD6E0;
      padding: 1rem 1.5rem;
    }

    /* CTA 区 */
    .cta-glow {
      background: radial-gradient(circle at 30% 30%, rgba(0,240,255,0.15), transparent 60%);
    }

    .btn-huge {
      padding: 1.2rem 3.5rem;
      font-size: 1.3rem;
    }

    .footer {
      background: #04081A;
      color: var(--text-dim);
      padding: 3rem 0 2rem;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 2.5rem; }
      .nav-anchors { gap: 1.3rem; }
    }

    @media (max-width: 768px) {
      .brand-row { padding: 0.7rem 1rem; }
      .nav-anchors { display: none; flex-direction: column; background: #0A0E27; }
      .nav-anchors.open { display: flex; }
      .hamburger { display: block; }
      .hero h1 { font-size: 2.2rem; }
    }