:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent: #ff4d4f;
      --accent-warm: #fa8c16;
      --accent-cyan: #06b6d4;
      --accent-purple: #7c3aed;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(37, 99, 235, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
    }
    body {
      line-height: 1.6;
      background: linear-gradient(180deg, #f0fdf4 0%, #f8fafc 400px, #f1f5f9 100%);
      min-height: 100vh;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    ul, ol {
      list-style: none;
    }
    .main-container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* Header */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid #e0e7ff;
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-group img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .brand-badge {
      font-size: 0.75rem;
      font-weight: 700;
      background: #ff4d4f;
      color: #fff;
      padding: 2px 8px;
      border-radius: 999px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover {
      color: var(--primary);
      background: #eff6ff;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      background: linear-gradient(135deg, #2563eb, #7c3aed);
      color: #ffffff !important;
      font-weight: 700;
      font-size: 0.9rem;
      border-radius: 999px;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }
    .btn-nav-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
    }

    /* Section Global */
    section.section-block {
      padding: 70px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 999px;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .tag-blue { background: #dbeafe; color: #1d4ed8; }
    .tag-red { background: #ffe4e6; color: #e11d48; }
    .tag-green { background: #dcfce7; color: #15803d; }
    .tag-purple { background: #f3e8ff; color: #6b21a8; }
    .tag-orange { background: #ffedd5; color: #c2410c; }
    
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
    }

    /* Hero (No Image as required) */
    .hero-section {
      padding: 60px 0 80px;
      background: radial-gradient(circle at 10% 20%, rgba(254, 240, 138, 0.25) 0%, rgba(219, 234, 254, 0.4) 50%, rgba(241, 245, 249, 0) 100%);
      border-bottom: 1px solid #e2e8f0;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.3rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span.highlight {
      background: linear-gradient(120deg, #ff4d4f 0%, #2563eb 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }
    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.1rem;
      font-weight: 800;
      color: #ffffff;
      background: #ff4d4f;
      border: 2px solid #ff4d4f;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 20px rgba(255, 77, 79, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-primary:hover {
      background: #e03135;
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(255, 77, 79, 0.45);
    }
    .btn-hero-secondary {
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      background: #eff6ff;
      border: 2px solid #bfdbfe;
      border-radius: var(--radius-md);
    }
    .btn-hero-secondary:hover {
      background: #dbeafe;
      border-color: var(--primary);
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .hero-badge-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .hero-badge-item .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
    }

    .hero-board {
      background: #ffffff;
      border: 2px solid #3b82f6;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: 0 20px 40px rgba(37, 99, 235, 0.12);
      position: relative;
    }
    .hero-board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px dashed #e2e8f0;
      padding-bottom: 16px;
      margin-bottom: 20px;
    }
    .board-title {
      font-weight: 800;
      font-size: 1.1rem;
      color: #0f172a;
    }
    .board-pill {
      background: #fef08a;
      color: #854d0e;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .stat-box {
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
    }
    .stat-box.alt-red { border-left-color: #ff4d4f; }
    .stat-box.alt-green { border-left-color: #10b981; }
    .stat-box.alt-purple { border-left-color: #8b5cf6; }
    .stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--text-main);
      display: block;
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 600;
    }
    .hero-board-footer {
      margin-top: 20px;
      padding-top: 16px;
      border-top: 1px solid #f1f5f9;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Model Matrix Banner */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-pill {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 700;
      color: #1e293b;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    }
    .model-pill:hover {
      border-color: #2563eb;
      color: #2563eb;
      transform: translateY(-2px);
    }

    /* Card Grids */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .card-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .card-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #93c5fd;
    }
    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 16px;
      font-weight: 800;
    }
    .bg-ico-blue { background: #eff6ff; color: #2563eb; }
    .bg-ico-red { background: #fff1f2; color: #e11d48; }
    .bg-ico-green { background: #f0fdf4; color: #16a34a; }
    .bg-ico-purple { background: #faf5ff; color: #9333ea; }
    .bg-ico-orange { background: #fff7ed; color: #ea580c; }
    .bg-ico-cyan { background: #ecfeff; color: #0891b2; }

    .card-h3 {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-badge-sub {
      display: inline-block;
      margin-top: 14px;
      font-size: 0.78rem;
      font-weight: 700;
      color: #2563eb;
      background: #eff6ff;
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
    }

    /* Comparison Table */
    .table-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 2px solid #e2e8f0;
      box-shadow: var(--shadow-md);
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #f8fafc;
      font-weight: 800;
      color: var(--text-main);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.brand-col {
      background: #eff6ff;
      font-weight: 700;
      color: #1d4ed8;
    }
    .score-badge-huge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ff4d4f;
      color: #ffffff;
      padding: 6px 16px;
      border-radius: 999px;
      font-weight: 800;
      font-size: 1.1rem;
    }

    /* Image Gallery Section */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .media-card-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.03);
    }
    .media-info {
      padding: 18px;
    }
    .media-title {
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 6px;
    }
    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Process Steps */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .step-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: #2563eb;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 14px;
    }

    /* Testimonials */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.94rem;
      color: #334155;
      margin-bottom: 16px;
      line-height: 1.6;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #e2e8f0;
      padding-top: 12px;
    }
    .reviewer-avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #e0e7ff;
      color: #3730a3;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }
    .reviewer-name {
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 920px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-question {
      padding: 18px 20px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-question:hover {
      background: #f8fafc;
      color: var(--primary);
    }
    .faq-icon {
      font-weight: 800;
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 20px 18px 20px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
      border-top: 1px dashed #f1f5f9;
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #ff4d4f;
    }

    /* Form & Contact */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 2px solid #e0e7ff;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid #cbd5e1;
      font-size: 0.92rem;
      font-family: inherit;
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      font-weight: 800;
      font-size: 1rem;
      color: #ffffff;
      background: #2563eb;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      background: #1d4ed8;
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(37, 99, 235, 0.25);
    }

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 20px;
    }
    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .info-label {
      font-weight: 700;
      color: var(--text-main);
      min-width: 80px;
    }
    .info-val {
      color: var(--text-muted);
      word-break: break-all;
    }
    .qr-container {
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px dashed #cbd5e1;
      text-align: center;
      max-width: 220px;
    }
    .qr-container img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      margin: 0 auto 8px auto;
      display: block;
      border-radius: 6px;
    }
    .qr-desc {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Articles & Links */
    .article-links-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      margin-top: 24px;
    }
    .article-links-box a {
      display: inline-block;
      margin: 4px 8px;
      color: #2563eb;
      font-weight: 600;
      font-size: 0.9rem;
    }
    .article-links-box a:hover {
      text-decoration: underline;
      color: #ff4d4f;
    }

    /* Footer */
    footer.site-footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 60px 0 30px;
      border-top: 4px solid #2563eb;
      margin-top: 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-list li {
      margin-bottom: 8px;
      font-size: 0.88rem;
    }
    .footer-list a:hover {
      color: #ffffff;
    }
    .friend-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }
    .friend-links-row a {
      color: #94a3b8;
      font-size: 0.85rem;
    }
    .friend-links-row a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.84rem;
      color: #64748b;
    }

    /* Floating CTA */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #2563eb;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
      cursor: pointer;
      font-size: 1.2rem;
      font-weight: 800;
      transition: var(--transition);
    }
    .float-btn:hover {
      transform: scale(1.1);
      background: #1d4ed8;
    }
    .float-btn.btn-qr {
      background: #10b981;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
    }
    @media (max-width: 600px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .hero-h1 {
        font-size: 1.8rem;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
    }