/* roulang page: index */
:root {
      --brand-green: #1B8E3F;
      --brand-green-deep: #157A34;
      --dark-scoreboard: #1A1D23;
      --bg-soft: #F5F7F5;
      --amber-accent: #FFC107;
      --text-main: #2C3E2D;
      --text-muted: #6B7B6D;
      --border-light: #DDE5DD;
      --card-shadow: 0 4px 16px rgba(0,0,0,0.04), 0 1px 4px rgba(0,0,0,0.02);
      --card-shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --transition-smooth: 0.25s ease;
      --font-mono: 'Roboto Mono', 'DIN', 'Monaco', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      background-color: var(--bg-soft);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.35;
      color: var(--text-main);
    }
    h1 {
      font-size: 2.75rem;
      font-weight: 700;
      letter-spacing: 0.02em;
    }
    h2 {
      font-size: 2rem;
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
    }
    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 3px;
      background-color: var(--brand-green);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.35rem;
    }
    .text-mono {
      font-family: var(--font-mono);
      font-weight: 700;
    }
    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0 15px;
    }
    section {
      padding: 5rem 0;
    }
    /* 导航栏 */
    .navbar-custom {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      padding: 0.8rem 0;
    }
    .navbar-brand-custom {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .navbar-brand-custom span {
      color: var(--brand-green);
    }
    .navbar-brand-custom small {
      font-size: 0.7rem;
      font-weight: 400;
      color: var(--text-muted);
      margin-left: 6px;
      letter-spacing: 0.5px;
    }
    .nav-link-custom {
      color: var(--text-main) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: var(--transition-smooth);
    }
    .nav-link-custom:hover {
      color: var(--brand-green) !important;
    }
    .nav-link-custom::after {
      content: '';
      position: absolute;
      width: 0;
      height: 2px;
      bottom: 0;
      left: 0;
      background: var(--brand-green);
      transition: width 0.25s ease;
    }
    .nav-link-custom:hover::after {
      width: 100%;
    }
    .btn-primary-custom {
      background: var(--brand-green);
      border: none;
      color: white;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      font-weight: 500;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 10px rgba(27,142,63,0.2);
    }
    .btn-primary-custom:hover {
      background: var(--brand-green-deep);
      box-shadow: 0 6px 18px rgba(27,142,63,0.4);
      color: white;
    }
    .btn-outline-custom {
      border: 1px solid var(--brand-green);
      color: var(--brand-green);
      background: transparent;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      font-weight: 500;
      transition: var(--transition-smooth);
    }
    .btn-outline-custom:hover {
      background: rgba(27,142,63,0.06);
      color: var(--brand-green);
    }
    /* Hero */
    .hero-section {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 6rem 0;
    }
    .hero-overlay {
      background: rgba(245,247,245,0.85);
      backdrop-filter: blur(4px);
    }
    .scorecard-mock {
      background: var(--dark-scoreboard);
      border-radius: 16px;
      padding: 1.5rem;
      color: white;
      box-shadow: 0 20px 35px rgba(0,0,0,0.2);
      transform: rotate(1deg);
    }
    .score-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--amber-accent);
    }
    /* 亮点网格不对称 */
    .feature-grid .col-custom:first-child {
      grid-row: span 2;
    }
    .feature-card {
      background: white;
      border-radius: var(--border-radius-card);
      padding: 2rem 1.5rem;
      box-shadow: var(--card-shadow);
      height: 100%;
      transition: var(--transition-smooth);
      border-left: 5px solid var(--brand-green);
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
    }
    /* 实时数据带 */
    .live-strip {
      background: var(--dark-scoreboard);
      overflow-x: auto;
      white-space: nowrap;
      padding: 1.5rem 0;
    }
    .live-chip {
      display: inline-block;
      background: rgba(255,255,255,0.08);
      border-radius: 30px;
      padding: 0.5rem 1.5rem;
      margin: 0 10px;
      color: white;
      font-weight: 500;
    }
    .live-chip .score {
      font-family: var(--font-mono);
      color: var(--amber-accent);
      font-weight: 700;
    }
    /* 案例瀑布流 */
    .masonry-card {
      break-inside: avoid;
      margin-bottom: 1.8rem;
      background: white;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
    }
    .masonry-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
    }
    .masonry-card img {
      width: 100%;
      display: block;
      border-radius: 12px 12px 0 0;
      transition: transform 0.3s ease;
    }
    .masonry-card:hover img {
      transform: scale(1.03);
    }
    /* 方案对比 */
    .plan-card {
      background: white;
      border-radius: 20px;
      padding: 2rem 1.5rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      border-top: 5px solid var(--brand-green);
    }
    .plan-card.recommended {
      border: 2px solid var(--brand-green);
      position: relative;
    }
    .badge-recommend {
      background: var(--amber-accent);
      color: #1A1D23;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: white;
      color: var(--brand-green);
      box-shadow: none;
      border-left: 4px solid var(--brand-green);
    }
    .accordion-button {
      font-weight: 600;
      border-left: 4px solid transparent;
    }
    /* CTA */
    .cta-section {
      background: var(--dark-scoreboard);
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-blend-mode: overlay;
    }
    .form-control-custom {
      border: 1px solid var(--border-light);
      border-radius: 8px;
      padding: 12px 15px;
    }
    .form-control-custom:focus {
      border-color: var(--brand-green);
      box-shadow: 0 0 0 3px rgba(27,142,63,0.15);
    }
    footer {
      background: #1A1D23;
      color: #B0B8B0;
    }
    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      h2 { font-size: 1.6rem; }
      section { padding: 3rem 0; }
    }