* {
      box-sizing: border-box;
    }

    :root {
      --bg: #f5f7f2;
      --surface: #ffffff;
      --text: #0f1720;
      --muted: #667085;
      --line: #e6ece2;
      --green: #49b14d;
      --green-dark: #2f7d32;
      --green-soft: #ecf8ec;
      --shadow: 0 20px 50px rgba(19, 31, 23, 0.08);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --container: 1240px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, #edf8eb 0, transparent 28%),
        linear-gradient(180deg, #f6f9f4 0%, #f5f7f2 100%);
    }

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

    .container {
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
      background: rgba(245, 247, 242, 0.88);
      border-bottom: 1px solid rgba(15, 23, 32, 0.05);
    }

    .nav {
      min-height: 78px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      display: flex;
      align-items: center;
    }

    .brand-logo {
      height: 54px;
      width: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      color: #4f5f56;
      font-size: 15px;
      font-weight: 700;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      border-radius: 999px;
      padding: 13px 22px;
      font-size: 15px;
      font-weight: 900;
      transition: 0.2s ease;
    }

    .btn-outline {
      background: #fff;
      color: var(--text);
      border: 1px solid var(--line);
    }

    .btn-primary {
      background: var(--green);
      color: #fff;
      box-shadow: 0 16px 32px rgba(73, 177, 77, 0.25);
    }

    .btn-light {
      background: rgba(255,255,255,0.14);
      color: #fff;
      border: 1px solid rgba(255,255,255,0.28);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover,
    .btn-primary:hover,
    .btn-light:hover {
      transform: translateY(-1px);
    }

    .btn-primary:hover {
      background: #40a744;
    }

    .btn-light:hover {
      background: rgba(255,255,255,0.22);
    }

    .hero-slider {
      position: relative;
      min-height: 760px;
      display: flex;
      align-items: center;
      overflow: hidden;
    }

    .hero-slider-bg {
      position: absolute;
      inset: 0;
      z-index: 1;
    }

    .hero-slide {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center center;
      opacity: 0;
      transform: scale(1.03);
      transition: opacity 0.9s ease, transform 5s ease;
    }

    .hero-slide.active {
      opacity: 1;
      transform: scale(1);
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      z-index: 2;
      background:
        linear-gradient(90deg, rgba(13, 23, 17, 0.72) 0%, rgba(13, 23, 17, 0.48) 35%, rgba(13, 23, 17, 0.22) 100%),
        linear-gradient(180deg, rgba(0,0,0,0.14), rgba(0,0,0,0.24));
    }

    .hero-slider-content {
      position: relative;
      z-index: 3;
      color: #fff;
      padding-top: 90px;
      padding-bottom: 90px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 10px 16px;
      margin-bottom: 20px;
      border-radius: 999px;
      background: rgba(255,255,255,0.14);
      border: 1px solid rgba(255,255,255,0.20);
      backdrop-filter: blur(8px);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0.3px;
    }

    .hero-slider-content h1 {
      max-width: 920px;
      margin: 0 0 20px;
      font-size: clamp(40px, 5vw, 78px);
      line-height: 0.98;
      letter-spacing: -1.8px;
      font-weight: 900;
    }

    .hero-slider-content p {
      max-width: 760px;
      margin: 0 0 28px;
      font-size: 18px;
      line-height: 1.7;
      color: rgba(255,255,255,0.92);
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .hero-dots {
      display: flex;
      gap: 10px;
      margin-top: 18px;
    }

    .hero-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: none;
      cursor: pointer;
      background: rgba(255,255,255,0.42);
      transition: 0.2s ease;
    }

    .hero-dot.active {
      background: #fff;
      transform: scale(1.08);
    }

    .section {
      padding: 34px 0 64px;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 24px;
    }

    .section-head h2 {
      margin: 0 0 8px;
      font-size: clamp(28px, 4vw, 48px);
      line-height: 1.02;
      font-weight: 900;
      letter-spacing: -1px;
    }

    .section-head p {
      margin: 0;
      color: #607166;
      max-width: 680px;
      font-size: 16px;
      line-height: 1.6;
    }

    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 24px;
    }

    .solution-card {
      background: rgba(255,255,255,0.92);
      border: 1px solid rgba(15,23,32,0.05);
      border-radius: 28px;
      padding: 28px;
      box-shadow: 0 18px 44px rgba(19,31,23,0.08);
    }

    .solution-icon {
      width: 62px;
      height: 62px;
      border-radius: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #eef9ee, #e4f4e4);
      font-size: 28px;
      margin-bottom: 16px;
    }

    .solution-card h3 {
      margin: 0 0 12px;
      font-size: 28px;
      line-height: 1.12;
      font-weight: 900;
      letter-spacing: -0.5px;
    }

    .solution-card p {
      margin: 0 0 18px;
      color: #5d6d63;
      font-size: 15px;
      line-height: 1.7;
    }

    .solution-list {
      margin: 0;
      padding-left: 18px;
      color: #24442b;
    }

    .solution-list li {
      margin-bottom: 10px;
      line-height: 1.5;
      font-size: 14px;
      font-weight: 700;
    }

    .calc-shell {
      display: grid;
      grid-template-columns: minmax(0, 1.12fr) 390px;
      gap: 24px;
      align-items: start;
    }

    .panel {
      background: rgba(255,255,255,0.92);
      border: 1px solid rgba(15, 23, 32, 0.05);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow);
      padding: 26px;
      backdrop-filter: blur(6px);
    }

    .panel + .panel {
      margin-top: 22px;
    }

    .panel-title {
      margin: 0 0 18px;
      font-size: 20px;
      font-weight: 900;
      letter-spacing: -0.2px;
    }

    .field {
      margin-bottom: 22px;
    }

    .field:last-child {
      margin-bottom: 0;
    }

    .label-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      margin-bottom: 10px;
    }

    .label-row label {
      font-size: 14px;
      font-weight: 800;
    }

    .value-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 98px;
      padding: 8px 12px;
      border-radius: 999px;
      background: linear-gradient(135deg, #57bf5c, #3aa944);
      color: #fff;
      font-size: 14px;
      font-weight: 900;
      box-shadow: 0 12px 24px rgba(73,177,77,0.22);
      white-space: nowrap;
    }

    input[type="range"] {
      width: 100%;
      accent-color: var(--green);
      cursor: pointer;
    }

    .help {
      margin-top: 8px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.55;
    }

    .switch-row {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 12px;
    }

    .switch-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 11px 14px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: #fff;
      cursor: pointer;
      font-size: 14px;
      font-weight: 800;
    }

    .switch-pill input {
      accent-color: var(--green);
    }

    .soft-box {
      border: 1px solid #e6eee3;
      background: linear-gradient(180deg, #fbfdf9, #f5faf2);
      border-radius: 22px;
      padding: 16px;
    }

    .soft-box-title {
      font-size: 14px;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .soft-box-text {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.6;
    }

    .manual-box {
      display: none;
    }

    .manual-row {
      display: grid;
      grid-template-columns: 1fr 100px;
      gap: 12px;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px solid #edf2ea;
    }

    .manual-row:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .manual-row:first-child {
      padding-top: 0;
    }

    .manual-title {
      font-size: 14px;
      font-weight: 800;
      line-height: 1.4;
    }

    .manual-sub {
      font-size: 12px;
      color: var(--muted);
      margin-top: 4px;
    }

    .qty-input,
    .text-input {
      width: 100%;
      padding: 13px 14px;
      border: 1px solid var(--line);
      background: #fff;
      border-radius: 16px;
      font-size: 14px;
      outline: none;
      transition: 0.2s ease;
    }

    .qty-input:focus,
    .text-input:focus {
      border-color: #8bcf84;
      box-shadow: 0 0 0 4px rgba(73,177,77,0.10);
    }

    .option-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .option-card {
      position: relative;
    }

    .option-card input[type="radio"] {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }

    .option-card label {
      display: block;
      height: 100%;
      padding: 16px;
      border: 1px solid var(--line);
      background: #fff;
      border-radius: 22px;
      cursor: pointer;
      transition: 0.2s ease;
      box-shadow: 0 6px 16px rgba(0,0,0,0.02);
    }

    .option-card label:hover {
      transform: translateY(-1px);
      border-color: #cfe6cb;
    }

    .option-card input[type="radio"]:checked + label {
      border-color: #85ce7f;
      background: linear-gradient(180deg, #ffffff, #f3fbf1);
      box-shadow: 0 0 0 3px rgba(73,177,77,0.08);
    }

    .option-title {
      display: block;
      font-size: 14px;
      line-height: 1.4;
      font-weight: 900;
      margin-bottom: 7px;
    }

    .option-sub {
      display: block;
      color: var(--muted);
      font-size: 12px;
        /* line-height: 1.5;
      margin-bottom: 10px; */
      min-height: 28px;
    }

    .option-price {
      display: inline-block;
      padding: 7px 12px;
      border-radius: 999px;
      background: #eef9ee;
      color: #2f7d32;
      font-size: 13px;
      font-weight: 900;
    }

    .checkbox-row {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 16px 18px;
      border: 1px solid var(--line);
      background: linear-gradient(180deg, #ffffff, #fafdf9);
      border-radius: 20px;
    }

    .checkbox-row input[type="checkbox"] {
      margin-top: 2px;
      width: 18px;
      height: 18px;
      accent-color: var(--green);
      cursor: pointer;
      flex: 0 0 auto;
    }

    .checkbox-row label {
      font-size: 14px;
      line-height: 1.55;
      cursor: pointer;
      font-weight: 700;
    }

    #map {
      height: 360px;
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
    }

    .map-info {
      margin-top: 14px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      padding: 14px 16px;
      border: 1px solid var(--line);
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff, #fafdf9);
      font-size: 14px;
    }

    .map-info span {
      color: var(--muted);
    }

    .map-info strong {
      text-align: right;
    }

    .submit-btn {
      width: 100%;
      border: none;
      border-radius: 999px;
      background: linear-gradient(135deg, #53bc58, #3aa943);
      color: #fff;
      padding: 15px 20px;
      font-size: 15px;
      font-weight: 900;
      cursor: pointer;
      box-shadow: 0 18px 34px rgba(73,177,77,0.24);
      transition: 0.2s ease;
    }

    .submit-btn:hover {
      transform: translateY(-1px);
      background: linear-gradient(135deg, #49b14d, #34983c);
    }

    .submit-btn:disabled {
      opacity: 0.75;
      cursor: wait;
    }

    .status-message {
      margin-top: 12px;
      font-size: 13px;
      min-height: 18px;
      line-height: 1.45;
    }

    .summary-card {
      position: sticky;
      top: 96px;
      background: linear-gradient(180deg, rgba(255,255,255,0.97), rgba(250,252,248,0.97));
      border: 1px solid rgba(15,23,32,0.05);
      border-radius: 30px;
      box-shadow: var(--shadow);
      padding: 26px;
      backdrop-filter: blur(10px);
    }

    .summary-title {
      margin: 0 0 18px;
      font-size: 22px;
      font-weight: 900;
      letter-spacing: -0.3px;
    }

    .summary-item {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 8px 0;
      border-bottom: 1px solid #edf2ea;
      font-size: 14px;
      /* line-height: 1.5; */
    }

    .summary-item:last-of-type {
      border-bottom: 0;
    }

    .summary-item span {
      color: var(--muted);
    }

    .summary-item strong {
      max-width: 62%;
      text-align: right;
      word-break: break-word;
      font-weight: 800;
    }

    .total-box {
      margin-top: 20px;
      border-radius: 24px;
      padding: 20px;
      background: linear-gradient(180deg, #f8fcf6, #eef8eb);
      border: 1px solid #dcead8;
      text-align: center;
    }

    .total-box small {
      display: block;
      color: var(--muted);
      font-size: 13px;
      margin-bottom: 8px;
    }

    .total-box .total {
      font-size: 36px;
      line-height: 1.08;
      font-weight: 900;
      letter-spacing: -1px;
    }

    .info-box {
      margin-top: 18px;
      border-radius: 20px;
      padding: 15px 16px;
      background: #eef9ee;
      border: 1px solid #dcebd9;
      color: #255b2b;
      font-size: 13px;
      line-height: 1.6;
    }

    .footer {
      padding: 34px 0 50px;
      color: #718177;
      font-size: 14px;
    }

    @media (max-width: 1140px) {
      .calc-shell,
      .solutions-grid {
        grid-template-columns: 1fr;
      }

      .summary-card {
        position: static;
      }
    }

    @media (max-width: 900px) {
      .hero-slider {
        min-height: 620px;
      }

      .hero-slider-content {
        padding-top: 70px;
        padding-bottom: 70px;
      }

      .brand-logo {
        height: 44px;
      }
    }

    @media (max-width: 820px) {
      .nav-links {
        display: none;
      }

      .option-grid {
        grid-template-columns: 1fr;
      }

      .manual-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(var(--container), calc(100% - 20px));
      }

      .nav {
        min-height: 70px;
      }

      .hero-slider {
        min-height: 560px;
      }

      .hero-slider-content h1 {
        font-size: clamp(34px, 11vw, 52px);
      }

      .hero-slider-content p {
        font-size: 16px;
      }

      .panel,
      .summary-card,
      .solution-card {
        padding: 18px;
        border-radius: 22px;
      }

      #map {
        height: 280px;
      }

      .summary-item strong {
        max-width: 56%;
      }

      .total-box .total {
        font-size: 30px;
      }

      .nav-actions .btn-outline {
        display: none;
      }
    }