/* roulang page: index */
:root {
      --primary-blue: #0A6EFF;
      --energy-orange: #FF6B2B;
      --bg-frost: #F7F9FC;
      --card-white: #FFFFFF;
      --text-dark: #1A1D28;
      --text-secondary: #5A6070;
      --shadow-sm: 0 4px 24px rgba(10, 110, 255, 0.06);
      --shadow-hover: 0 12px 32px rgba(10, 110, 255, 0.12);
      --radius-card: 16px;
      --space-big: 100px;
      --space-md: 24px;
      --max-width: 1280px;
      --transition: 0.25s ease;
      --glass-bg: rgba(255,255,255,0.96);
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--bg-frost);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 通用区块 */
    section {
      padding: var(--space-big) 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      :root {
        --space-md: 20px;
      }
    }

    /* 导航 (抖店风格 PF) */
    header {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      font-size: 28px;
      color: var(--primary-blue);
    }
    .logo-text {
      font-weight: 700;
      font-size: 24px;
      color: var(--text-dark);
    }
    .logo-domain {
      font-size: 12px;
      color: var(--text-secondary);
      margin-left: 6px;
      font-weight: 400;
    }

    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 16px;
      color: var(--text-dark);
      position: relative;
      padding-bottom: 5px;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-blue);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--primary-blue);
    }
    .nav-links a:hover::after {
      width: 100%;
    }

    .hamburger {
      display: none;
      cursor: pointer;
      font-size: 24px;
      color: #1a1d28;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        padding: 32px 24px;
        gap: 24px;
        box-shadow: 0 12px 24px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      nav {
        height: 64px;
      }
    }

    /* 按钮 */
    .btn {
      padding: 12px 28px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      transition: all 0.25s;
      cursor: pointer;
      border: 2px solid transparent;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-blue);
      color: var(--primary-blue);
    }
    .btn-outline:hover {
      background: rgba(10,110,255,0.05);
    }
    .btn-primary {
      background: var(--energy-orange);
      color: white;
      border: 2px solid var(--energy-orange);
    }
    .btn-primary:hover {
      background: #E55A1F;
      border-color: #E55A1F;
    }
    .btn-white {
      background: white;
      color: var(--primary-blue);
      border: 2px solid white;
    }

    /* Hero */
    .hero {
      padding: 70px 0 80px;
      background: radial-gradient(circle at 85% 20%, rgba(10,110,255,0.12) 0%, transparent 45%);
    }
    .hero-grid {
      display: flex;
      gap: 48px;
      align-items: center;
    }
    .hero-left {
      flex: 0 0 55%;
    }
    .hero-right {
      flex: 1;
      position: relative;
      min-height: 400px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      color: #0D1A2F;
    }
    .hero h1 span {
      color: var(--primary-blue);
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 480px;
    }

    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero-left { flex: auto; }
      .hero h1 { font-size: 36px; }
      .hero-sub { margin-left: auto; margin-right: auto; }
      .hero-right { min-height: 300px; width: 100%; }
    }

    /* 亮点网格 */
    .grid-bento {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      grid-auto-rows: auto;
      gap: 24px;
    }
    .grid-item {
      background: var(--card-white);
      border-radius: 22px;
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .grid-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .item-tall {
      grid-row: span 2;
    }
    .icon-blue {
      font-size: 36px;
      color: var(--primary-blue);
      margin-bottom: 18px;
    }
    .grid-item h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .grid-item p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.6;
    }
    .bg-cover-block {
      background: url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      position: relative;
      border-radius: 22px;
      overflow: hidden;
      color: white;
      display: flex;
      align-items: flex-end;
      min-height: 220px;
    }
    .bg-cover-block .overlay-text {
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      padding: 28px;
      width: 100%;
    }
    @media (max-width: 768px) {
      .grid-bento {
        grid-template-columns: 1fr;
      }
      .item-tall { grid-row: auto; }
    }

    /* 案例瀑布 */
    .masonry {
      display: flex;
      gap: 20px;
    }
    .column {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      position: relative;
      overflow: hidden;
    }
    .case-img img {
      transition: 0.4s ease;
      aspect-ratio: 16/9;
      object-fit: cover;
    }
    .case-card:hover .case-img img {
      transform: scale(1.05);
    }
    .case-hover {
      position: absolute;
      inset: 0;
      background: rgba(10,110,255,0.35);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 600;
      opacity: 0;
      transition: 0.3s;
    }
    .case-card:hover .case-hover {
      opacity: 1;
    }
    .case-info {
      padding: 16px 20px 20px;
    }
    .case-tag {
      display: inline-block;
      background: #EBF2FF;
      color: #0A6EFF;
      border-radius: 20px;
      padding: 2px 12px;
      font-size: 13px;
    }
    @media (max-width: 768px) {
      .masonry { flex-direction: column; }
    }

    /* 方案对比 */
    .table-compare {
      display: flex;
      gap: 0;
      background: white;
      border-radius: 20px;
      overflow: auto;
      box-shadow: var(--shadow-sm);
    }
    .col-feature, .col-plan {
      min-width: 180px;
      flex: 1;
    }
    .col-plan.highlight {
      background: #F0F6FF;
      border-left: 1px solid rgba(10,110,255,0.2);
      position: relative;
    }
    .badge-recommend {
      background: var(--energy-orange);
      color: white;
      font-size: 13px;
      padding: 4px 15px;
      border-radius: 20px;
      position: absolute;
      top: 20px;
      right: 20px;
    }
    .row {
      padding: 18px 24px;
      border-bottom: 1px solid #eee;
    }
    .check-blue { color: var(--primary-blue); }
    @media (max-width: 768px) {
      .table-compare { min-width: 640px; }
    }

    /* FAQ */
    .faq-layout {
      display: flex;
      gap: 40px;
    }
    .faq-tabs {
      flex: 0 0 180px;
    }
    .faq-tab {
      padding: 10px 16px;
      border-radius: 30px;
      margin-bottom: 10px;
      cursor: pointer;
    }
    .faq-tab.active {
      background: #EBF2FF;
      color: #0A6EFF;
      font-weight: 600;
    }
    .accordion-item {
      border-bottom: 1px solid #ddd;
    }
    .accordion-q {
      font-weight: 600;
      padding: 18px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .accordion-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }
    @media (max-width: 768px) {
      .faq-layout { flex-direction: column; }
    }

    footer {
      background: #0A1628;
      color: #CCC;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }