/* roulang page: index */
:root {
      --mg-silver: #B0BEC5;
      --electro-cyan: #006064;
      --amber-warning: #FF6F00;
      --cold-bg: #F5F7FA;
      --card-bg: #FFFFFF;
      --deep-slate: #1C2833;
      --text-primary: #263238;
      --text-secondary: #455A64;
      --border-light: #E0E8EF;
      --shadow-card: 0 2px 12px rgba(0,96,100,0.06);
      --shadow-hover: 0 8px 24px rgba(0,96,100,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--cold-bg);
      color: var(--text-primary);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: var(--electro-cyan);
      text-decoration: none;
      transition: color 0.2s;
    }

    a:hover {
      text-decoration: underline;
      color: #004D40;
    }

    h1, h2, h3 {
      font-weight: 700;
      margin-top: 0;
    }

    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      margin-bottom: 24px;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }

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

    .section {
      padding: 120px 0;
    }

    /* 导航栏 */
    .nav-branding {
      background: rgba(28, 40, 51, 0.95);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(176,190,197,0.2);
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      padding: 12px 0;
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      color: var(--mg-silver);
      font-size: 1.5rem;
      letter-spacing: 0.5px;
      text-decoration: none;
    }

    .logo:hover {
      text-decoration: none;
      color: white;
    }

    .mg-icon {
      background: var(--electro-cyan);
      width: 34px;
      height: 34px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 6px;
      font-weight: 700;
      color: white;
      font-size: 1.2rem;
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: #CFD8DC;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

    .nav-links a:hover {
      color: white;
      border-bottom-color: var(--electro-cyan);
      text-decoration: none;
    }

    .nav-cta {
      background: var(--amber-warning);
      color: white !important;
      padding: 10px 20px !important;
      border-radius: 30px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
      border: none;
      margin-left: 12px;
    }

    .status-badge {
      background: rgba(255,111,0,0.15);
      color: var(--amber-warning);
      font-size: 0.75rem;
      padding: 4px 12px;
      border-radius: 20px;
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: 12px;
      white-space: nowrap;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background: #FF3D00;
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(1.2); }
      100% { opacity: 1; transform: scale(1); }
    }

    .hamburger {
      display: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(90deg, #F5F7FA 0%, #ECEFF4 100%);
      padding-top: 80px;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-text {
      flex: 1;
    }

    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 450px;
      border-radius: 24px;
      box-shadow: var(--shadow-hover);
      border: 1px solid rgba(0,96,100,0.1);
    }

    .data-badges {
      display: flex;
      gap: 24px;
      margin: 32px 0;
    }

    .badge {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 16px 24px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--electro-cyan);
    }

    .badge-number {
      font-size: 2rem;
      font-weight: 700;
      color: var(--amber-warning);
      font-family: var(--font-mono);
    }

    .btn {
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      display: inline-block;
      transition: all 0.2s;
      text-decoration: none;
      border: none;
      cursor: pointer;
      font-size: 1rem;
    }

    .btn-primary {
      background: var(--electro-cyan);
      color: white;
    }

    .btn-primary:hover {
      background: #004D40;
      text-decoration: none;
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--electro-cyan);
      color: var(--electro-cyan);
    }

    .btn-outline:hover {
      background: var(--electro-cyan);
      color: white;
      text-decoration: none;
    }

    .btn-cta {
      background: var(--amber-warning);
      color: white;
      animation: subtlePulse 2s infinite;
    }

    @keyframes subtlePulse {
      0% { box-shadow: 0 0 0 0 rgba(255,111,0,0.4); }
      70% { box-shadow: 0 0 0 10px rgba(255,111,0,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,111,0,0); }
    }

    /* 功能卡片 2:1 权重 */
    .features-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
      border: 1px solid transparent;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0,96,100,0.2);
      border-left: 3px solid var(--electro-cyan);
    }

    .card img {
      border-radius: 8px;
      margin-bottom: 20px;
    }

    .tag {
      background: #ECEFF1;
      color: var(--electro-cyan);
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 600;
    }

    /* 场景横滑 */
    .scenario-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      padding-bottom: 12px;
    }

    .scenario-card {
      min-width: 280px;
      flex: 0 0 auto;
      scroll-snap-align: start;
      background: white;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    /* 流程竖线 */
    .process-steps {
      display: flex;
      flex-direction: column;
      gap: 32px;
      position: relative;
      padding-left: 40px;
    }

    .step-item {
      display: flex;
      gap: 24px;
      align-items: flex-start;
      position: relative;
    }

    .step-marker {
      width: 24px;
      height: 24px;
      background: var(--electro-cyan);
      border-radius: 50%;
      position: absolute;
      left: -52px;
      top: 5px;
      border: 3px solid white;
      box-shadow: 0 0 0 2px var(--electro-cyan);
    }

    .chem-text {
      font-family: var(--font-mono);
      background: #F0F4F8;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.9rem;
    }

    /* FAQ */
    .accordion-title {
      font-size: 1rem;
      font-weight: 600;
      border-left: 3px solid var(--electro-cyan);
      padding-left: 16px;
      background: transparent;
    }

    /* CTA区块 */
    #cta {
      background: var(--deep-slate);
      background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5 L55 20 L55 45 L30 60 L5 45 L5 20 Z' fill='none' stroke='%23006064' stroke-width='1' stroke-opacity='0.2'/%3E%3C/svg%3E");
      color: white;
    }

    .form-input {
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 6px;
      color: white;
      padding: 12px;
    }

    .footer-links a {
      color: #B0BEC5;
      font-size: 0.9rem;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 36px; }
      .features-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 640px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .hero-grid { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr; }
      .section { padding: 60px 0; }
      .data-badges { flex-direction: column; }
    }