:root {
      --green: #19892b;
      --green-dark: #19892b;
      --green-soft: #f4f1ef;
      --ink: #211719;
      --muted: #75696b;
      --line: #eadfe0;
      --paper: #f7f5f2;
      --white: #fff;
      --max: 1180px;
      --shadow: 0 20px 60px rgba(112, 20, 25, .12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--white);
      font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    .container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }

    .topbar {
      background: var(--green-dark);
      color: rgba(255,255,255,.86);
      font-size: 13px;
    }
    .topbar-inner {
      min-height: 34px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .topbar a { color: var(--green); font-weight: 600; }

    header {
      position: sticky;
      top: 0;
      z-index: 10;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(223,232,225,.8);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }
    .brand { display: inline-flex; align-items: center; gap: 11px; white-space: nowrap; }
    .nav .brand-mark {
      width: 180px;
      height: auto;
      aspect-ratio: 2500 / 750;
      flex: 0 0 180px;
      display: block;
      border-radius: 0;
      background: transparent;
      object-fit: contain;
      object-position: center;
      image-rendering: auto;
    }
    .brand-name { font-size: 19px; font-weight: 800; letter-spacing: .04em; }
    .brand-sub { display: block; color: var(--muted); font-size: 10px; letter-spacing: .11em; font-weight: 700; }
    .nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 600; color: #4a3b3d; }
    .nav-links a { transition: color .2s ease; }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 0 21px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta, .button-primary { background: var(--green); color: #fff; box-shadow: 0 8px 20px rgba(25,137,43,.2); }
    .nav-cta:hover, .button-primary:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 12px 25px rgba(25,137,43,.28); }
    .menu-button { display: none; border: 0; background: transparent; font-size: 26px; color: var(--ink); }

    .hero {
      position: relative;
      min-height: 650px;
      display: flex;
      align-items: center;
      overflow: hidden;
      background: #f4f2ef;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0 0 0 47%;
      background: linear-gradient(90deg, #f4f2ef 0%, rgba(244,242,239,.15) 24%, rgba(244,242,239,0) 55%), url("images/hero.jpg") center/cover no-repeat;
    }
    .hero::after {
      content: "";
      position: absolute;
      width: 480px;
      height: 480px;
      right: -170px;
      top: -190px;
      border: 1px solid rgba(25,137,43,.16);
      border-radius: 50%;
      box-shadow: 0 0 0 44px rgba(25,137,43,.04), 0 0 0 88px rgba(25,137,43,.025);
    }
    .hero-content { position: relative; z-index: 1; width: 55%; padding: 92px 0 110px; }
    .eyebrow { color: var(--green); font-size: 13px; letter-spacing: .16em; font-weight: 800; }
    h1 { max-width: 650px; margin: 18px 0 22px; font-size: clamp(40px, 5vw, 68px); line-height: 1.15; letter-spacing: -.045em; }
    h1 .hero-product { color: var(--ink); }
    h1 em { color: var(--green); font-style: normal; }
    .hero-copy { max-width: 540px; margin: 0 0 32px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; }
    .button-secondary { border: 1px solid #b8b5ae; color: var(--green-dark); background: rgba(255,255,255,.62); }
    .button-secondary:hover { border-color: var(--green); background: #fff; transform: translateY(-2px); }
    .hero-note { margin-top: 35px; display: flex; align-items: center; gap: 11px; color: var(--muted); font-size: 13px; }
    .hero-note span { width: 8px; height: 8px; background: var(--green); border-radius: 50%; box-shadow: 0 0 0 6px rgba(25,137,43,.12); }

    .trust-strip { border-bottom: 1px solid var(--line); background: #fff; }
    .trust-inner { min-height: 100px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; align-items: center; }
    .trust-item { display: flex; align-items: center; gap: 13px; color: var(--muted); font-size: 13px; }
    .trust-item strong { display: block; color: var(--ink); font-size: 18px; line-height: 1.2; }
    .trust-icon { width: 37px; height: 37px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 12px; color: var(--green); background: var(--green-soft); font-size: 18px; }

    section { padding: 110px 0; }
    .section-heading { max-width: 650px; margin-bottom: 45px; }
    .section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
    h2 { margin: 12px 0 15px; font-size: clamp(30px, 4vw, 46px); line-height: 1.2; letter-spacing: -.04em; }
    .section-heading p { margin: 0; color: var(--muted); font-size: 16px; }

    .problem { background: var(--paper); }
    .problem-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 70px; align-items: center; }
    .problem-image { position: relative; min-height: 480px; border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); }
    .problem-image img { width: 100%; height: 100%; min-height: 480px; object-fit: cover; }
    .image-caption { position: absolute; left: 24px; right: 24px; bottom: 24px; padding: 18px 20px; border: 1px solid rgba(255,255,255,.35); border-radius: 14px; color: #fff; background: rgba(9,30,18,.65); backdrop-filter: blur(10px); }
    .image-caption strong { display: block; font-size: 19px; }
    .image-caption span { color: rgba(255,255,255,.75); font-size: 13px; }
    .pain-list { display: grid; gap: 17px; }
    .pain-item { display: grid; grid-template-columns: 40px 1fr; gap: 15px; padding: 18px 0; border-bottom: 1px solid var(--line); }
    .pain-item:last-child { border-bottom: 0; }
    .pain-number { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: var(--green); background: var(--green-soft); font-weight: 800; font-size: 13px; }
    .pain-item h3 { margin: 0 0 3px; font-size: 17px; }
    .pain-item p { margin: 0; color: var(--muted); font-size: 14px; }

    .solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .solution-card { min-height: 270px; padding: 28px; border: 1px solid var(--line); border-radius: 17px; background: #fff; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
    .solution-card:hover { transform: translateY(-6px); border-color: #c9c7c0; box-shadow: 0 18px 38px rgba(112,20,25,.09); }
    .solution-card.featured { color: #fff; border-color: var(--green); background: var(--green); }
    .solution-icon { width: 45px; height: 45px; display: grid; place-items: center; margin-bottom: 32px; border-radius: 13px; color: var(--green); background: var(--green-soft); }
    .solution-icon svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
    .featured .solution-icon { color: #fff; background: rgba(255,255,255,.15); }
    .solution-card h3 { margin: 0 0 10px; font-size: 20px; }
    .solution-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .featured p { color: rgba(255,255,255,.75); }
    .solution-link { display: inline-block; margin-top: 20px; color: var(--green); font-size: 13px; font-weight: 800; }
    .featured .solution-link { color: #fff; }

    .capability { background: #181415; color: #fff; overflow: hidden; }
    .capability-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: center; }
    .capability .eyebrow { color: #19892b; }
    .capability p { color: rgba(255,255,255,.68); }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top: 1px solid rgba(255,255,255,.15); }
    .capability-item { padding: 25px 20px 25px 0; border-bottom: 1px solid rgba(255,255,255,.15); }
    .capability-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.15); }
    .capability-item:nth-child(even) { padding-left: 20px; }
    .capability-item strong { display: block; margin-bottom: 5px; font-size: 17px; }
    .capability-item span { color: rgba(255,255,255,.58); font-size: 13px; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: process; }
    .step { position: relative; padding: 27px 22px; border-radius: 15px; background: var(--paper); }
    .step::before { counter-increment: process; content: "0" counter(process); display: block; margin-bottom: 34px; color: #8f8983; font-size: 13px; font-weight: 800; letter-spacing: .1em; }
    .step h3 { margin: 0 0 8px; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }

    .contact { padding: 80px 0; background: linear-gradient(110deg, var(--green-dark), var(--green)); color: #fff; }
    .contact-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .85fr); align-items: center; gap: 55px; }
    .contact h2 { margin: 0 0 8px; font-size: 36px; }
    .contact p { margin: 0; color: rgba(255,255,255,.76); }
    .contact-details { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 18px; color: rgba(255,255,255,.82); font-size: 14px; }
    .contact-details a:hover { color: #fff; }
    .contact-details span { display: inline-flex; align-items: center; gap: 7px; }
    .contact-form { display: grid; gap: 14px; padding: 26px; border: 1px solid rgba(255,255,255,.24); border-radius: 4px; background: rgba(24,20,21,.2); }
    .contact-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
    .contact-field { display: grid; gap: 6px; }
    .contact-field label { color: rgba(255,255,255,.84); font-size: 13px; }
    .contact-field input, .contact-field textarea { width: 100%; box-sizing: border-box; border: 1px solid rgba(255,255,255,.3); border-radius: 3px; padding: 11px 12px; color: #24191a; background: rgba(255,255,255,.96); font: inherit; font-size: 14px; outline: none; }
    .contact-field input { min-height: 46px; }
    .contact-field textarea { min-height: 92px; resize: vertical; }
    .contact-field input:focus, .contact-field textarea:focus { border-color: #fff; box-shadow: 0 0 0 3px rgba(255,255,255,.18); }
    .contact-field input:invalid:not(:placeholder-shown), .contact-field textarea:invalid:not(:placeholder-shown) { border-color: #19892b; }
    .contact-form-actions { display: flex; align-items: center; gap: 15px; }
    .contact-form .button { min-width: 140px; color: #fff; background: var(--green); border: 0; border-radius: 4px; box-shadow: none; transform: none; transition: background .2s ease; }
    .contact-form .button:hover { background: var(--green-dark); box-shadow: none; transform: none; }
    .contact-form .button:disabled { cursor: wait; opacity: .65; }
    .contact-status { min-height: 22px; color: rgba(255,255,255,.84); font-size: 13px; }
    .contact-status.success { color: #f1eee9; }
    .contact-status.error { color: #f0c36a; }

    footer { padding: 52px 0 25px; color: #9e9495; background: #181415; font-size: 13px; }
    .footer-top { display: grid; grid-template-columns: 1.35fr 1fr 1fr 1fr; gap: 35px; padding-bottom: 42px; }
    footer .brand-name { color: #fff; }
    footer .brand-sub { color: #839087; }
    footer .brand-mark { background: #fff; }
    footer .brand-mark::after { border-color: var(--green); }
    footer .brand-mark::before { background: var(--green); }
    footer h3 { margin: 0 0 14px; color: #fff; font-size: 14px; }
    footer p { max-width: 290px; margin: 16px 0 0; line-height: 1.8; }
    footer ul { padding: 0; margin: 0; list-style: none; }
    footer li { margin: 8px 0; }
    footer li a:hover { color: #fff; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); }

    @media (max-width: 900px) {
      .nav-links { gap: 16px; }
      .hero-content { width: 68%; }
      .hero::before { inset: 0; opacity: .27; }
      .hero-content { padding: 80px 0 100px; }
      .problem-grid, .capability-grid { grid-template-columns: 1fr; gap: 42px; }
      .problem-image { min-height: 360px; }
      .problem-image img { min-height: 360px; }
      .solutions-grid { grid-template-columns: repeat(2, 1fr); }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 680px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .topbar-inner { min-height: 32px; font-size: 11px; }
      .topbar-inner span { display: none; }
      .nav { min-height: 66px; }
      .nav-links, .nav-cta { display: none; }
      .menu-button { display: block; }
      .nav.open .nav-links { position: absolute; display: flex; flex-direction: column; align-items: stretch; gap: 0; left: 16px; right: 16px; top: 74px; padding: 10px; border: 1px solid var(--line); border-radius: 15px; background: #fff; box-shadow: var(--shadow); }
      .nav.open .nav-links a { padding: 11px 13px; }
      .hero { min-height: 620px; }
      .hero-content { width: 100%; padding: 75px 0 90px; }
      .hero::before { background: linear-gradient(90deg, #f4f2ef 0%, rgba(244,242,239,.78) 58%, rgba(244,242,239,.38)), url("images/hero.jpg") center/cover no-repeat; opacity: 1; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 15px; }
      .trust-inner { grid-template-columns: repeat(2, 1fr); gap: 20px 10px; padding: 25px 0; }
      .trust-item { font-size: 11px; gap: 8px; }
      .trust-item strong { font-size: 15px; }
      .trust-icon { width: 30px; height: 30px; border-radius: 9px; font-size: 14px; }
      section { padding: 74px 0; }
      .section-heading { margin-bottom: 30px; }
      .solutions-grid, .steps { grid-template-columns: 1fr; }
      .solution-card { min-height: auto; }
      .capability-list { grid-template-columns: 1fr; }
      .capability-item:nth-child(odd) { border-right: 0; }
      .capability-item:nth-child(even) { padding-left: 0; }
      .solutions-heading h2, #services .section-heading h2, #iot .section-heading h2 { white-space: normal; }
      .contact-form { width: 100%; box-sizing: border-box; }
      .contact h2 { font-size: 30px; }
      .footer-top { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
      .footer-top > :first-child { grid-column: 1 / -1; }
      .footer-bottom { flex-direction: column; gap: 6px; }
    }
    /* Premium editorial layout */
    :root {
      --green: #19892b;
      --green-dark: #19892b;
      --green-soft: #f5f5f3;
      --ink: #1d1718;
      --muted: #756b6c;
      --line: #e8dfe0;
      --paper: #fbf8f7;
      --white: #fff;
      --max: 1280px;
      --shadow: 0 16px 45px rgba(45, 42, 38, .09);
    }

    body { background: #fff; color: var(--ink); letter-spacing: .005em; }
    .container { width: min(var(--max), calc(100% - 72px)); }
    .topbar { background: #f5f5f3; color: #756b6c; border-bottom: 1px solid var(--line); letter-spacing: .035em; }
    .topbar-inner { min-height: 38px; }
    header { background: rgba(255,255,255,.97); border-bottom-color: #eee6e6; }
    .nav { min-height: 86px; gap: 42px; }
    .brand { gap: 14px; }
    .brand-mark { width: 180px; height: auto; aspect-ratio: 2500 / 750; flex-basis: 180px; border-radius: 0; }
    .brand-name, .brand-sub { display: none; }
    .nav-links { gap: 32px; font-size: 16px; font-weight: 400; color: #2b2021; letter-spacing: .035em; }
    .nav-cta, .button { min-height: 50px; padding: 0 27px; border-radius: 4px; letter-spacing: .04em; }
    .nav-cta { min-height: 44px; padding: 0 23px; }
    .nav-cta, .button-primary { box-shadow: 0 10px 24px rgba(25,137,43,.2); }

    .hero { height: min(720px, calc(100vh - 124px)); min-height: 520px; background: #f4f2ef; }
    .hero::before {
      inset: 0;
      background: linear-gradient(90deg, rgba(244,242,239,.98) 0%, rgba(244,242,239,.91) 34%, rgba(244,242,239,.24) 70%, rgba(244,242,239,0) 100%), url("images/hero.jpg") center/cover no-repeat;
    }
    .hero::after { width: 580px; height: 580px; right: -220px; top: -240px; border-color: rgba(25,137,43,.2); box-shadow: 0 0 0 48px rgba(25,137,43,.05), 0 0 0 96px rgba(25,137,43,.025); }
    .hero-content { width: 61%; padding: 40px 0; }
    .eyebrow { font-size: 12px; letter-spacing: .25em; }
    h1 { max-width: 760px; margin: 24px 0 28px; font-size: clamp(48px, 6.3vw, 88px); line-height: 1.08; letter-spacing: -.065em; }
    .hero-copy { max-width: 570px; margin-bottom: 39px; color: #655a5b; font-size: 18px; line-height: 1.9; }
    .hero-actions { gap: 16px; }
    .button-secondary { border-color: #aaa49c; background: rgba(255,255,255,.55); }
    .hero-note { margin-top: 43px; padding-top: 20px; border-top: 1px solid rgba(45,42,38,.18); color: #796e6f; }

    .trust-strip { border-bottom: 1px solid var(--line); background: #f5f5f3; color: var(--ink); }
    .trust-inner { min-height: 116px; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .trust-item { min-height: 56px; padding: 0 30px; border-right: 1px solid var(--line); color: var(--muted); }
    .trust-item:first-child { padding-left: 0; }
    .trust-item:last-child { border-right: 0; }
    .trust-item strong { color: var(--ink); font-size: 20px; }
    .trust-icon { width: 42px; height: 42px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 4px; color: #fff; background: var(--green); }
    .trust-icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

    section { padding: 145px 0; }
    .section-heading { max-width: 710px; margin-bottom: 58px; }
    .section-heading .eyebrow { font-size: 15px; line-height: 1.4; letter-spacing: .14em; }
    .section-heading.center { max-width: 780px; }
    .solutions-heading { max-width: 1080px !important; }
    .solutions-heading h2, #services .section-heading h2, #iot .section-heading h2 { white-space: nowrap; }
    h2 { margin: 15px 0 20px; font-size: clamp(36px, 4.5vw, 60px); line-height: 1.1; letter-spacing: -.06em; }
    .section-heading p { font-size: 17px; line-height: 1.9; }
    .problem { background: #fbf8f7; }
    .problem-grid { grid-template-columns: 1.05fr .95fr; gap: 110px; }
    .problem-image { min-height: 600px; border-radius: 3px; box-shadow: var(--shadow); }
    .problem-image img { min-height: 600px; }
    .image-caption { left: 28px; right: 28px; bottom: 28px; padding: 22px 24px; border-radius: 3px; background: rgba(25,18,19,.78); }
    .image-caption strong { font-size: 21px; }
    .pain-list { gap: 0; }
    .pain-item { grid-template-columns: 48px 1fr; gap: 20px; padding: 25px 0; }
    .pain-number { width: 38px; height: 38px; border-radius: 3px; font-size: 15px; }
    .pain-item h3 { margin-bottom: 7px; font-size: 19px; }
    .pain-item p { font-size: 15px; line-height: 1.8; }

    .solutions-grid { grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .solution-card { min-height: 320px; padding: 35px 32px; border: 0; border-radius: 0; }
    .solution-card:hover { transform: none; box-shadow: inset 0 0 0 2px var(--green); }
    .solution-card.featured { border: 0; }
    .solution-icon { width: 50px; height: 50px; margin-bottom: 48px; border-radius: 3px; }
    .solution-icon svg { width: 25px; height: 25px; }
    .solution-card h3 { font-size: 22px; }
    .solution-card p { font-size: 15px; line-height: 1.8; }
    .solution-link { margin-top: 25px; }

    .ecosystem, .iot-section { background: #fff; }
    .ecosystem-heading { max-width: 820px; }
    .ecosystem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
    .ecosystem-card { min-height: 220px; padding: 30px; background: #fff; }
    .ecosystem-card:hover { box-shadow: inset 0 0 0 2px var(--green); }
    .ecosystem-mark { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 28px; border: 1px solid var(--line); border-radius: 4px; color: var(--green); background: var(--green-soft); font-size: 14px; font-weight: 800; letter-spacing: .03em; }
    .ecosystem-mark img { width: 30px; height: 30px; object-fit: contain; }
    .ecosystem-card h3 { margin: 0 0 9px; font-size: 21px; }
    .ecosystem-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
    .integration-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 58px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .flow-step { position: relative; min-height: 150px; padding: 28px 28px 28px 0; border-right: 1px solid var(--line); }
    .flow-step:not(:first-child) { padding-left: 28px; }
    .flow-step:last-child { border-right: 0; }
    .flow-step::before { content: attr(data-step); display: block; margin-bottom: 22px; color: var(--green); font-size: 16px; font-weight: 900; letter-spacing: .1em; }
    .flow-step h3 { margin: 0 0 7px; font-size: 18px; }
    .flow-step p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
    .iot-section { background: var(--paper); }
    .iot-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 100px; align-items: center; }
    .iot-panel { padding: 38px; border: 1px solid var(--line); background: #fff; }
    .iot-panel-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding-bottom: 25px; border-bottom: 1px solid var(--line); }
    .iot-panel-header strong { display: block; font-size: 21px; }
    .iot-panel-header span { color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
    .iot-list { display: grid; gap: 0; }
    .iot-item { display: grid; grid-template-columns: 30px 1fr; gap: 15px; padding: 20px 0; border-bottom: 1px solid var(--line); }
    .iot-item:last-child { border-bottom: 0; padding-bottom: 0; }
    .iot-item:first-child { padding-top: 25px; }
    .iot-number { color: var(--green); font-size: 15px; font-weight: 900; letter-spacing: .04em; }
    .iot-item strong { display: block; margin-bottom: 3px; font-size: 16px; }
    .iot-item span { color: var(--muted); font-size: 13px; line-height: 1.7; }
    .scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
    .scenario-card { min-height: 180px; padding: 27px; background: #fff; }
    .scenario-card h3 { margin: 0 0 11px; font-size: 19px; }
    .scenario-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
    .contact-intent { margin-top: 24px; color: var(--muted); font-size: 14px; line-height: 1.8; }
    .contact-intent strong { color: var(--ink); }

    .capability { background: #f5f5f3; color: var(--ink); }
    .capability .eyebrow { color: var(--green-dark); font-size: 15px; line-height: 1.4; letter-spacing: .12em; }
    .capability h2 { color: var(--ink); }
    .capability p { color: var(--muted); }
    .capability-cta { margin-top: 22px; background: #19892b; color: #fff; }

    .capability-list { border-top-color: var(--line); }
    .capability-item:nth-child(odd) { border-right-color: var(--line); }
    .capability-item { padding: 29px 24px 29px 0; color: var(--ink); }
    .capability-item:nth-child(even) { padding-left: 24px; }
    .capability-item strong { font-size: 18px; color: var(--ink); }
    .capability-item span { color: var(--muted); font-size: 14px; line-height: 1.65; }

    .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { min-height: 220px; padding: 30px 30px 30px 0; border-radius: 0; background: transparent; border-right: 1px solid var(--line); }
    .step:not(:first-child) { padding-left: 30px; }
    .step:nth-child(3n + 1) { padding-left: 0; }
    .step:nth-child(3n) { border-right: 0; }
    .step:nth-child(-n + 3) { border-bottom: 1px solid var(--line); }
    .step:last-child { border-right: 0; border-bottom: 0; }
    .step::before { margin-bottom: 45px; color: var(--green); font-size: 30px; line-height: 1; font-weight: 800; letter-spacing: .08em; }
    .step h3 { font-size: 21px; }
    .step p { font-size: 14px; line-height: 1.8; }

    .contact { padding: 96px 0; background: #f5f5f3; color: var(--ink); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .contact-inner { grid-template-columns: minmax(0, 1fr) minmax(420px, .9fr); gap: 70px; }
    .contact h2 { color: var(--ink); }
    .contact p { color: var(--muted); }
    .contact-details { color: var(--muted); }
    .contact .button { min-width: 170px; color: #fff; background: var(--green); }
    .contact-form { border-color: var(--line); background: #fff; box-shadow: 0 12px 35px rgba(45,42,38,.08); }
    .contact-field label { color: var(--ink); }
    .contact-field input, .contact-field textarea { color: var(--ink); border-color: var(--line); background: #fff; }
    .contact-field input:focus, .contact-field textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(25,137,43,.12); }
    .contact-form .button { color: #fff; background: var(--green); box-shadow: none; transform: none; }
    .contact-form .button:hover { background: var(--green-dark); box-shadow: none; transform: none; }
    .contact-status { color: var(--muted); }
    .contact-status.success { color: var(--green-dark); }
    .contact-status.error { color: #a56b00; }
    .contact h2 { max-width: 720px; margin-bottom: 13px; font-size: clamp(34px, 4.2vw, 56px); line-height: 1.12; letter-spacing: -.055em; }
    .contact p { font-size: 16px; }
    .contact-form { padding: 26px; }

    footer { padding: 72px 0 28px; background: #181415; }
    .footer-top { grid-template-columns: 1.45fr 1fr 1fr 1.25fr .85fr; gap: 42px; padding-bottom: 60px; }
    footer .brand-mark { width: 52px; height: 50px; padding: 5px; aspect-ratio: 400 / 389; flex-basis: 52px; border-radius: 8px; object-fit: contain; }
    footer p { margin-top: 22px; color: #9e9495; font-size: 14px; }
    footer h3 { margin-bottom: 20px; font-size: 13px; letter-spacing: .12em; }
    footer li { margin: 11px 0; color: #9e9495; }
    .footer-address { white-space: nowrap; }
    .footer-qr { display: block; width: 96px; height: 96px; margin-top: 18px; padding: 5px; border-radius: 0; background: #fff; object-fit: contain; }
    .footer-qr-label { margin-top: 8px; color: #9e9495; font-size: 12px; }
    .footer-bottom { padding-top: 24px; border-top-color: rgba(255,255,255,.14); }

    @media (max-width: 900px) {
      .container { width: min(var(--max), calc(100% - 48px)); }
      .nav { gap: 20px; }
      .nav-links { gap: 22px; font-size: 15px; font-weight: 400; }
      .hero { height: min(620px, calc(100vh - 106px)); min-height: 480px; }
      .hero-content { width: 70%; padding: 32px 0; }
      .problem-grid, .capability-grid, .iot-grid { gap: 60px; }
      .problem-image, .problem-image img { min-height: 500px; }
      .capability-grid { grid-template-columns: 1fr; }
      .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-grid { grid-template-columns: repeat(2, 1fr); }
      .integration-flow { grid-template-columns: repeat(2, 1fr); }
      .flow-step:nth-child(2) { border-right: 0; }
      .flow-step:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
      .flow-step:nth-child(3) { padding-left: 0; }
      .iot-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(3, 1fr); }
      .step:nth-child(3n + 1) { padding-left: 0; }
      .step:nth-child(3n) { border-right: 0; }
      .step:nth-child(-n + 3) { border-bottom: 1px solid var(--line); }
      .step:last-child { border-bottom: 0; }
      .footer-top { gap: 35px 25px; grid-template-columns: 1.35fr 1fr 1fr 1.2fr; }
    }

    @media (max-width: 680px) {
      .container { width: calc(100% - 32px); }
      .topbar-inner { min-height: 34px; }
      .nav { min-height: 72px; }
      .nav .brand-mark { width: 145px; height: auto; aspect-ratio: 2500 / 750; flex-basis: 145px; }
      footer .brand-mark { width: 54px; height: 53px; aspect-ratio: 400 / 389; flex-basis: 54px; border-radius: 7px; }
      .brand-name { font-size: 17px; }
      .nav.open .nav-links { top: 80px; border-radius: 4px; font-size: 17px; font-weight: 400; }
      .hero { height: min(590px, calc(100vh - 72px)); min-height: 500px; }
      .hero::before { background: linear-gradient(90deg, rgba(244,242,239,.98), rgba(244,242,239,.72)), url("images/hero.jpg") center/cover no-repeat; }
      .hero-content { width: 100%; padding: 28px 0; }
      h1 { font-size: 48px; }
      .hero-copy { font-size: 15px; line-height: 1.8; }
      .trust-inner { grid-template-columns: repeat(2, 1fr); padding: 22px 0; }
      .trust-item, .trust-item:first-child { min-height: 62px; padding: 10px 12px 10px 0; border-right: 0; }
      .trust-item strong { font-size: 16px; }
      section { padding: 90px 0; }
      h2 { font-size: 39px; }
      .problem-grid { gap: 45px; }
      .problem-image, .problem-image img { min-height: 390px; }
      .solutions-grid { grid-template-columns: 1fr; }
      .solution-card { min-height: 255px; padding: 30px 25px; }
      .solution-icon { margin-bottom: 30px; }
      .ecosystem-grid, .scenario-grid { grid-template-columns: 1fr; }
      .ecosystem-card { min-height: auto; padding: 26px; }
      .integration-flow { grid-template-columns: 1fr; margin-top: 40px; }
      .flow-step, .flow-step:not(:first-child) { min-height: auto; padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .flow-step:last-child { border-bottom: 0; }
      .iot-panel { padding: 25px; }
      .scenario-card { min-height: auto; padding: 25px; }
      .capability-list { grid-template-columns: 1fr; }
      .capability-item, .capability-item:nth-child(even) { padding: 23px 0; border-right: 0; }
      .steps { grid-template-columns: 1fr; }
      .step, .step:not(:first-child) { min-height: auto; padding: 25px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .step:last-child { border-bottom: 0; }
      .step::before { margin-bottom: 24px; }
      .contact { padding: 80px 0; }
      .contact-inner { align-items: flex-start; }
      .contact h2 { font-size: 38px; }
      .footer-top { grid-template-columns: 1fr 1fr; gap: 35px 20px; }
      .footer-top > div:last-child { grid-column: 2; }
      .footer-qr { width: 84px; height: 84px; }
    }