/* roulang page: index */
:root {
      --primary: #0B192C;
      --primary-light: #1E3E62;
      --accent: #00D29E;
      --accent-hover: #00b386;
      --cta-orange: #FF6B35;
      --cta-orange-hover: #e85924;
      --bg-light: #F4F6F9;
      --bg-white: #FFFFFF;
      --bg-dark: #0E131F;
      --bg-dark-card: #161D2E;
      --text-main: #111827;
      --text-muted: #4B5563;
      --text-sub: #6B7280;
      --border-color: #E5E7EB;
      --border-dark: #222F43;
      --shadow-sm: 0 2px 8px rgba(11, 25, 44, 0.05);
      --shadow-md: 0 8px 24px rgba(11, 25, 44, 0.08);
      --shadow-accent: 0 8px 24px rgba(0, 210, 158, 0.16);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-pill: 9999px;
      --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
      --font-base: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-base);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Top Bar */
    .top-bar {
      background-color: #060E18;
      color: #9CA3AF;
      font-size: 13px;
      border-bottom: 1px solid #162235;
      padding: 8px 0;
    }
    .top-bar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-tags {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .badge-cert {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-family: var(--font-mono);
      font-size: 12px;
    }
    .badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: var(--accent);
      box-shadow: 0 0 6px var(--accent);
    }

    /* Main Navbar */
    .main-navbar {
      background-color: var(--primary);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
      transition: all 0.3s ease;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-symbol {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--accent) 0%, #008f6b 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06111E;
      font-weight: 800;
      font-size: 20px;
      box-shadow: 0 2px 10px rgba(0, 210, 158, 0.3);
    }
    .brand-name {
      color: #FFFFFF;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: 0.5px;
    }
    .brand-sub {
      display: block;
      color: #9CA3AF;
      font-size: 11px;
      font-weight: 400;
      font-family: var(--font-mono);
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: #D1D5DB;
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: #FFFFFF;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #06111E;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 14px rgba(0, 210, 158, 0.35);
      transform: translateY(-1px);
    }
    .btn-orange {
      background-color: var(--cta-orange);
      color: #FFFFFF;
    }
    .btn-orange:hover {
      background-color: var(--cta-orange-hover);
      box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      background: transparent;
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(0, 210, 158, 0.05);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #FFFFFF;
      font-size: 24px;
      cursor: pointer;
    }

    /* Section Base */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 600;
      font-family: var(--font-mono);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      background-color: rgba(0, 210, 158, 0.1);
      color: #009670;
      border: 1px solid rgba(0, 210, 158, 0.25);
    }
    .section-tag.dark-mode {
      background-color: rgba(0, 210, 158, 0.12);
      color: var(--accent);
      border-color: rgba(0, 210, 158, 0.3);
    }
    .section-title {
      font-size: clamp(24px, 3.2vw, 34px);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .section-title.text-white {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-desc.text-light {
      color: #9CA3AF;
    }

    /* 1. Hero (#hero) */
    .hero-section {
      background-color: var(--primary);
      background-image: linear-gradient(135deg, rgba(11, 25, 44, 0.95) 0%, rgba(6, 14, 24, 0.98) 100%), url('/assets/images/5f1dd69a6b57528c.webp');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      padding: 90px 0 100px;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(30px, 4vw, 44px);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      color: var(--accent);
    }
    .hero-content p {
      font-size: 16px;
      color: #D1D5DB;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .hero-feat-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .hero-feat-num {
      font-family: var(--font-mono);
      font-size: 20px;
      font-weight: 700;
      color: var(--accent);
    }
    .hero-feat-label {
      font-size: 13px;
      color: #9CA3AF;
    }
    .hero-visual-card {
      background: rgba(22, 29, 46, 0.85);
      border: 1px solid rgba(0, 210, 158, 0.25);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
      position: relative;
    }
    .hero-img-box {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16/10;
    }
    .hero-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .hero-img-box:hover img {
      transform: scale(1.03);
    }
    .hero-visual-bar {
      padding: 16px 20px;
      background: #09121E;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .hero-status-tag {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 2. Brand & Architecture (#about) */
    .about-section {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .about-img-wrap {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .about-img-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .about-badge-float {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(11, 25, 44, 0.95);
      color: #FFFFFF;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border-left: 4px solid var(--accent);
      font-size: 13px;
    }
    .about-badge-float strong {
      display: block;
      font-size: 16px;
      color: var(--accent);
      font-family: var(--font-mono);
      margin-bottom: 2px;
    }
    .arch-points {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-point-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .arch-num {
      width: 28px;
      height: 28px;
      border-radius: var(--radius-sm);
      background-color: rgba(11, 25, 44, 0.06);
      color: var(--primary);
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .arch-point-item p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .arch-point-item strong {
      color: var(--text-main);
    }

    /* 3. Advantages (#advantages) */
    .advantages-section {
      background-color: var(--bg-light);
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
      box-shadow: var(--shadow-accent);
    }
    .adv-icon-box {
      width: 44px;
      height: 44px;
      background-color: rgba(0, 210, 158, 0.12);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #008f6b;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 20px;
      border: 1px solid rgba(0, 210, 158, 0.25);
    }
    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .adv-tag {
      font-family: var(--font-mono);
      font-size: 12px;
      color: #009670;
      background-color: #ECFDF5;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
    }

    /* 4. Products (#products) */
    .products-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .prod-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .prod-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #94A3B8;
    }
    .prod-img-box {
      height: 220px;
      overflow: hidden;
      position: relative;
      background-color: #0B192C;
    }
    .prod-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .prod-card:hover .prod-img-box img {
      transform: scale(1.05);
    }
    .prod-code-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(11, 25, 44, 0.85);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      font-family: var(--font-mono);
      font-size: 12px;
      padding: 4px 8px;
      border-radius: 4px;
      border-left: 3px solid var(--accent);
    }
    .prod-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .prod-body h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .prod-brief {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .prod-params {
      list-style: none;
      margin-top: auto;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .prod-params li {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }
    .prod-param-label {
      color: var(--text-sub);
    }
    .prod-param-val {
      font-family: var(--font-mono);
      font-weight: 600;
      color: var(--text-main);
    }

    /* 5. Cases (#cases) */
    .cases-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      padding: 90px 0;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .case-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }
    .case-env-tag {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent);
      margin-bottom: 12px;
      display: block;
    }
    .case-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #FFFFFF;
    }
    .case-card p {
      font-size: 14px;
      color: #9CA3AF;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .case-spec-box {
      margin-top: auto;
      background: rgba(0, 0, 0, 0.25);
      border-radius: var(--radius-sm);
      padding: 12px;
      border: 1px dashed var(--border-dark);
    }
    .case-spec-row {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: #CBD5E1;
      padding: 4px 0;
    }

    /* 6. Stories (#stories) */
    .stories-section {
      background-color: #FFFFFF;
    }
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      background: var(--bg-light);
    }
    .story-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .story-meta {
      font-size: 13px;
      color: var(--text-sub);
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      gap: 16px;
    }
    .story-compare {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }
    .compare-box {
      background: #FFFFFF;
      padding: 16px;
      border-radius: var(--radius-sm);
      border-left: 3px solid #94A3B8;
    }
    .compare-box.active-plan {
      border-left-color: var(--accent);
    }
    .compare-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-sub);
      margin-bottom: 6px;
      display: block;
    }
    .compare-desc {
      font-size: 13px;
      color: var(--text-main);
      line-height: 1.5;
    }
    .story-result {
      background: #ECFDF5;
      border: 1px solid #A7F3D0;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: #065F46;
      font-weight: 500;
    }

    /* 7. Metrics (#metrics) */
    .metrics-section {
      background: linear-gradient(135deg, #09121E 0%, #111C2E 100%);
      color: #FFFFFF;
      padding: 56px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 0 16px;
      position: relative;
    }
    .metric-item:not(:last-child)::after {
      content: '';
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background-color: var(--border-dark);
    }
    .metric-value {
      font-family: var(--font-mono);
      font-size: clamp(32px, 3.5vw, 44px);
      font-weight: 700;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom:4px;
    }
    .metric-sub {
      font-size: 12px;
      color: #9CA3AF;
    }

    /* 8. Testimonials (#testimonials) */
    .testimonials-section {
      background-color: var(--bg-light);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testi-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-author-box {
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .author-role {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-company {
      font-size: 12px;
      color: var(--text-sub);
    }
    .testi-tag {
      font-family: var(--font-mono);
      font-size: 11px;
      background: #F3F4F6;
      color: #4B5563;
      padding: 2px 6px;
      border-radius: 4px;
    }

    /* 9. News (#news) */
    .news-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #FFFFFF;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }
    .news-cover {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-cover img {
      transform: scale(1.05);
    }
    .news-category {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(11, 25, 44, 0.85);
      color: #FFFFFF;
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .news-content {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-date {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .news-link {
      margin-top: auto;
      font-size: 13px;
      font-weight: 600;
      color: #008f6b;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: var(--accent-hover);
    }

    /* 10. FAQ (#faq) */
    .faq-section {
      background-color: var(--bg-light);
    }
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item:hover {
      border-color: #CBD5E1;
    }
    .faq-question {
      padding: 18px 24px;
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
    }
    .faq-toggle-icon {
      width: 20px;
      height: 20px;
      position: relative;
      flex-shrink: 0;
      margin-left: 12px;
    }
    .faq-toggle-icon::before, .faq-toggle-icon::after {
      content: '';
      position: absolute;
      background-color: var(--text-sub);
      transition: transform 0.25s ease;
    }
    .faq-toggle-icon::before {
      top: 9px;
      left: 2px;
      width: 16px;
      height: 2px;
    }
    .faq-toggle-icon::after {
      top: 2px;
      left: 9px;
      width: 2px;
      height: 16px;
    }
    .faq-item.active .faq-toggle-icon::after {
      transform: rotate(90deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #FAFAFA;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 280px;
      padding: 16px 24px 24px;
      border-top: 1px solid var(--border-color);
    }
    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 11. Guarantee (#guarantee) */
    .guarantee-section {
      background-color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      border: 1px solid rgba(0, 210, 158, 0.35);
      border-radius: var(--radius-sm);
      padding: 24px 20px;
      background: #FAFDFA;
      box-shadow: 0 2px 8px rgba(0, 210, 158, 0.05);
      transition: all 0.25s ease;
    }
    .guarantee-card:hover {
      box-shadow: 0 6px 20px rgba(0, 210, 158, 0.15);
      border-color: var(--accent);
    }
    .guarantee-icon {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 16px;
      color: #009670;
      margin-bottom: 10px;
      display: inline-block;
    }
    .guarantee-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. Contact Form (#contact) */
    .contact-section {
      background-color: var(--bg-light);
      padding: 90px 0;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 48px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .contact-info-panel {
      background: var(--primary);
      color: #FFFFFF;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-panel h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #FFFFFF;
    }
    .contact-info-panel p {
      font-size: 14px;
      color: #D1D5DB;
      line-height: 1.7;
      margin-bottom: 32px;
    }
    .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-bottom: 32px;
    }
    .method-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .method-label {
      font-size: 12px;
      color: #9CA3AF;
      font-family: var(--font-mono);
      text-transform: uppercase;
    }
    .method-val {
      font-size: 16px;
      font-weight: 600;
      color: var(--accent);
    }
    .contact-notice {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 16px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: #9CA3AF;
      line-height: 1.6;
    }
    .contact-form-panel {
      padding: 48px;
    }
    .contact-form-panel h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 24px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #F9FAFB;
      transition: all 0.2s ease;
    }
    .form-control:focus {
      outline: none;
      background: #FFFFFF;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0, 210, 158, 0.2);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 15px;
      letter-spacing: 0.5px;
    }

    /* Sticky Bottom Bar */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(11, 25, 44, 0.95);
      backdrop-filter: blur(8px);
      border-top: 1px solid rgba(0, 210, 158, 0.3);
      padding: 12px 0;
      z-index: 999;
      transform: translateY(100%);
      transition: transform 0.3s ease;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
    }
    .sticky-bar.visible {
      transform: translateY(0);
    }
    .sticky-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .sticky-text {
      color: #FFFFFF;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .sticky-tag {
      background: rgba(0, 210, 158, 0.2);
      color: var(--accent);
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      font-family: var(--font-mono);
    }
    .sticky-btn-wrap {
      display: flex;
      gap: 12px;
    }

    /* Footer */
    .site-footer {
      background-color: #080E17;
      color: #9CA3AF;
      padding: 64px 0 32px;
      border-top: 1px solid #162235;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.9fr 0.9fr 1.1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #8C9BAE;
    }
    .footer-links h4, .footer-certs h4, .footer-contact h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-links h4::after, .footer-certs h4::after, .footer-contact h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background-color: var(--accent);
    }
    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-nav-list a {
      color: #9CA3AF;
      font-size: 13px;
    }
    .footer-nav-list a:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .footer-certs ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
    }
    .footer-certs li {
      display: flex;
      align-items: center;
      gap: 8px;
      color: #D1D5DB;
    }
    .footer-certs li::before {
      content: '✓';
      color: var(--accent);
      font-weight: bold;
    }
    .footer-contact p {
      font-size: 13px;
      line-height: 1.8;
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid #162235;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: #6B7280;
    }
    .footer-bottom a {
      color: #8C9BAE;
    }
    .footer-bottom a:hover {
      color: var(--accent);
    }

    /* Responsive Queries */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .about-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .adv-grid, .products-grid, .cases-grid, .news-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .metric-item:nth-child(2)::after {
        display: none;
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: var(--primary);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-dark);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-links.show {
        display: flex;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .hero-section {
        padding: 60px 0 70px;
      }
      .adv-grid, .products-grid, .cases-grid, .news-grid, .testimonials-grid, .stories-grid {
        grid-template-columns: 1fr;
      }
      .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item::after {
        display: none !important;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .contact-info-panel, .contact-form-panel {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .top-bar-content {
        justify-content: center;
      }
      .hero-features-bar {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .sticky-text {
        font-size: 13px;
      }
      .sticky-content {
        flex-direction: column;
        text-align: center;
      }
    }