/* roulang page: index */
:root {
      --bg-base: #070b19;
      --bg-surface: #0d1527;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-card: rgba(255, 255, 255, 0.08);
      --border-hover: rgba(0, 210, 255, 0.45);
      --primary-blue: #0066ff;
      --cyan-neon: #00d2ff;
      --green-aurora: #10b981;
      --accent-glow: #00f2fe;
      --text-main: #f8fafc;
      --text-sub: #94a3b8;
      --text-muted: #64748b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-glow: 0 0 25px rgba(0, 102, 255, 0.28);
      --shadow-cyan: 0 0 30px rgba(0, 210, 255, 0.2);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-surface) 100%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      min-height: 100vh;
    }

    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--cyan-neon); }
    img { max-width: 100%; height: auto; display: block; }

    /* Top Info Bar */
    .top-bar-notice {
      background: rgba(7, 11, 25, 0.95);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
      color: var(--text-sub);
      padding: 6px 0;
    }
    .top-bar-notice a { color: var(--cyan-neon); font-weight: 500; }
    .top-bar-notice .icon-badge { color: var(--green-aurora); margin-right: 6px; }

    /* Main Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(13, 21, 39, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-card);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #ffffff;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-blue), var(--cyan-neon));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
      color: #fff;
      font-size: 1.1rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
      margin: 0;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: #fff;
    }
    .nav-link.active::after, .nav-link:hover::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--primary-blue), var(--cyan-neon));
      border-radius: 2px;
    }
    .btn-nav-action {
      background: linear-gradient(135deg, var(--primary-blue) 0%, #0088ff 100%);
      color: #ffffff !important;
      padding: 9px 22px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 50px;
      box-shadow: 0 0 16px rgba(0, 102, 255, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.15);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-nav-action:hover {
      box-shadow: 0 0 24px rgba(0, 210, 255, 0.6);
      transform: translateY(-1px);
    }

    /* Common Components & Glassmorphism */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--border-hover);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-divider {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .sec-header {
      margin-bottom: 48px;
    }
    .sec-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: 50px;
      color: var(--cyan-neon);
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .sec-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: #ffffff;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .sec-desc {
      color: var(--text-sub);
      font-size: 1.05rem;
      max-width: 680px;
      line-height: 1.7;
      margin: 0 auto;
    }
    .btn-glow-primary {
      background: linear-gradient(135deg, var(--primary-blue) 0%, var(--cyan-neon) 100%);
      color: #ffffff;
      padding: 14px 34px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 50px;
      box-shadow: 0 0 25px rgba(0, 102, 255, 0.45);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-glow-primary:hover {
      box-shadow: 0 0 35px rgba(0, 210, 255, 0.7);
      transform: translateY(-2px);
      color: #ffffff;
    }
    .btn-glow-outline {
      background: rgba(255, 255, 255, 0.05);
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 13px 30px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 50px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-glow-outline:hover {
      background: rgba(0, 210, 255, 0.1);
      border-color: var(--cyan-neon);
      color: #ffffff;
    }

    /* Section 1: Hero Banner 旗舰级双层视效 */
    .hero-section {
      position: relative;
      padding: 80px 0 100px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 102, 255, 0.15) 0%, transparent 60%),
                  url('/assets/images/c3bf985a4ec96f35.png') center/cover no-repeat;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 11, 25, 0.8) 0%, rgba(7, 11, 25, 0.95) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-series-bar {
      display: inline-flex;
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 50px;
      padding: 6px 16px;
      margin-bottom: 24px;
      backdrop-filter: blur(10px);
      gap: 16px;
    }
    .hero-series-item {
      font-size: 0.85rem;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-series-item i { color: var(--cyan-neon); font-size: 0.75rem; }
    .hero-title {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.18;
      margin-bottom: 24px;
      background: linear-gradient(180deg, #ffffff 30%, #cbd5e1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-stats-row {
      display: flex;
      justify-content: center;
      gap: 30px;
      margin-top: 45px;
      flex-wrap: wrap;
    }
    .hero-stat-box {
      text-align: left;
      border-left: 2px solid var(--cyan-neon);
      padding-left: 14px;
    }
    .hero-stat-box .val {
      font-size: 1.7rem;
      font-weight: 700;
      color: #fff;
      font-family: monospace;
    }
    .hero-stat-box .lbl {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .hero-dashboard-mockup {
      margin-top: 50px;
      background: rgba(13, 21, 39, 0.75);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: var(--radius-lg);
      padding: 16px;
      box-shadow: 0 20px 50px rgba(0,0,0,0.6);
      position: relative;
    }
    .mockup-header-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      margin-bottom: 16px;
    }
    .mockup-dots {
      display: flex;
      gap: 6px;
    }
    .mockup-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #ef4444; }
    .dot-yellow { background: #f59e0b; }
    .dot-green { background: #10b981; }

    /* Section 2: 品牌与参数标准 */
    .param-spec-box {
      padding: 24px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.06);
    }
    .param-spec-box .num {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--cyan-neon);
      margin-bottom: 4px;
    }

    /* Section 3: 核心优势矩阵 */
    .feature-icon-box {
      width: 54px;
      height: 54px;
      border-radius: var(--radius-sm);
      background: rgba(0, 102, 255, 0.15);
      border: 1px solid rgba(0, 210, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-neon);
      font-size: 1.4rem;
      margin-bottom: 20px;
    }

    /* Section 4: 热门产品与分析套件 */
    .pricing-card {
      padding: 36px 30px;
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .pricing-card.featured {
      border-color: var(--cyan-neon);
      background: linear-gradient(180deg, rgba(13, 31, 60, 0.8) 0%, rgba(15, 23, 42, 0.85) 100%);
      box-shadow: 0 0 30px rgba(0, 102, 255, 0.3);
    }
    .pricing-badge-popular {
      position: absolute;
      top: 18px;
      right: 18px;
      background: linear-gradient(90deg, #ff007a, #9900ef);
      color: #fff;
      font-size: 0.72rem;
      padding: 3px 10px;
      border-radius: 20px;
      font-weight: 700;
    }

    /* Section 5: 深色拓扑与理念架构 */
    .topo-architecture {
      background: radial-gradient(circle at 50% 50%, rgba(0, 210, 255, 0.08) 0%, transparent 70%),
                  rgba(10, 16, 32, 0.95);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .topo-step {
      padding: 20px;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.03);
      border: 1px dashed rgba(0, 210, 255, 0.25);
    }

    /* Section 7: 高亮统计条 */
    .stat-counter-panel {
      background: linear-gradient(90deg, rgba(0, 102, 255, 0.12) 0%, rgba(0, 210, 255, 0.12) 100%);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: var(--radius-md);
      padding: 40px 20px;
    }
    .counter-value {
      font-size: 2.8rem;
      font-weight: 800;
      color: #ffffff;
      text-shadow: 0 0 15px rgba(0, 210, 255, 0.6);
      font-family: monospace;
    }

    /* Section 8: 权威评价 */
    .review-stars {
      color: #fbbf24;
      font-size: 0.85rem;
      margin-bottom: 12px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: rgba(0, 210, 255, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-neon);
      font-weight: 700;
      font-size: 0.9rem;
    }

    /* Section 9: 资讯卡片 */
    .news-thumb-wrap {
      height: 200px;
      overflow: hidden;
      border-radius: var(--radius-md) var(--radius-md) 0 0;
      position: relative;
    }
    .news-thumb-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .glass-card:hover .news-thumb-wrap img {
      transform: scale(1.06);
    }
    .news-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(7, 11, 25, 0.8);
      border: 1px solid rgba(0, 210, 255, 0.3);
      padding: 3px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      color: var(--cyan-neon);
    }

    /* Section 11: FAQ 手风琴 */
    .faq-item {
      background: rgba(15, 23, 42, 0.65);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-left: 4px solid var(--cyan-neon);
      border-color: rgba(0, 210, 255, 0.3);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    .faq-title {
      padding: 20px 24px;
      font-size: 1.1rem;
      font-weight: 600;
      color: #fff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-title i {
      transition: transform 0.3s;
      color: var(--cyan-neon);
    }
    .faq-item.active .faq-title i {
      transform: rotate(180deg);
    }
    .faq-content {
      padding: 0 24px 22px;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.8;
      display: none;
    }
    .faq-item.active .faq-content {
      display: block;
    }

    /* Section 12: 转化表单 */
    .cta-box {
      background: linear-gradient(135deg, rgba(13, 31, 60, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
      border: 1px solid rgba(0, 210, 255, 0.35);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      box-shadow: 0 0 50px rgba(0, 102, 255, 0.2);
    }
    .cta-form-control {
      background: rgba(7, 11, 25, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #ffffff;
      padding: 14px 20px;
      border-radius: 50px;
      font-size: 0.95rem;
      width: 100%;
      outline: none;
      transition: var(--transition);
    }
    .cta-form-control:focus {
      border-color: var(--cyan-neon);
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
      background: rgba(7, 11, 25, 0.9);
      color: #fff;
    }

    /* Footer */
    .site-footer {
      background: #04070f;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px;
      font-size: 0.9rem;
      color: var(--text-sub);
    }
    .footer-col-title {
      font-size: 1.05rem;
      color: #fff;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .footer-link-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-link-list li {
      margin-bottom: 10px;
    }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 15px;
    }

    /* Responsive Breakpoints */
    @media screen and (max-width: 1024px) {
      .hero-title { font-size: 2.6rem; }
      .nav-menu { gap: 16px; }
    }
    @media screen and (max-width: 768px) {
      .top-bar-notice { display: none; }
      .nav-menu { display: none; }
      .hero-title { font-size: 2.1rem; }
      .section-wrap { padding: 60px 0; }
      .cta-box { padding: 36px 20px; }
      .sec-title { font-size: 1.8rem; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }