/* roulang page: index */
:root {
      --green: #2C4A34;
      --green-deep: #223a29;
      --green-night: #15221A;
      --amber: #C8962A;
      --amber-soft: #e3c36a;
      --orange: #D86B2A;
      --steel: #5E6770;
      --ink: #1C241E;
      --cream: #F3EEE4;
      --paper: #FCFAF6;
      --line: rgba(94, 103, 112, 0.18);
      --line-strong: rgba(28, 36, 30, 0.12);
      --text: #1C241E;
      --muted: #5E6770;
      --white: #FFFdf8;
      --radius-card: 10px;
      --radius-btn: 5px;
      --shadow: 0 8px 0 rgba(28, 36, 30, 0.08);
      --shadow-hover: 0 10px 0 rgba(28, 36, 30, 0.1);
      --space: 28px;
      --max: 1220px;
      --nav-h: 72px;
      --ease: 180ms ease;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html, body { margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background: var(--cream);
      font-size: 17px;
      line-height: 1.8;
      letter-spacing: 0.01em;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; color: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    h1, h2, h3, h4, p { margin: 0; }
    h1, h2, h3 { font-weight: 700; line-height: 1.28; letter-spacing: 0.02em; }
    :focus-visible {
      outline: 2px solid var(--amber);
      outline-offset: 3px;
    }
    body.nav-lock { overflow: hidden; }
    .container {
      width: min(100% - 40px, var(--max));
      margin: 0 auto;
    }
    .skip {
      position: absolute;
      left: -999px;
      top: 8px;
    }
    .skip:focus {
      left: 12px;
      z-index: 100;
      background: #fff;
      padding: 8px 12px;
    }
    .site-header { position: relative; z-index: 50; }
    .topbar {
      background: #e8efe6;
      color: var(--green);
      font-size: 13px;
      border-bottom: 1px solid var(--line);
    }
    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      padding: 6px 0;
    }
    .topbar a { color: var(--green-deep); font-weight: 500; }
    .topbar a:hover { color: var(--orange); }
    .topbar-links { display: flex; gap: 18px; flex-wrap: wrap; }
    .top-quick { display: flex; gap: 14px; }
    .top-quick a {
      padding: 4px 8px;
      min-height: 28px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(44, 74, 52, 0.18);
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.55);
    }
    .nav-main {
      position: sticky;
      top: 0;
      background: rgba(252, 250, 246, 0.96);
      border-bottom: 1px solid var(--line-strong);
      box-shadow: 0 6px 0 rgba(28, 36, 30, 0.03);
      backdrop-filter: saturate(1.1);
    }
    .nav-inner {
      min-height: var(--nav-h);
      display: grid;
      grid-template-columns: auto 1fr auto;
      align-items: center;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 44px;
      color: var(--green);
    }
    .brand-mark {
      width: 42px;
      height: 42px;
      border: 1px solid rgba(44, 74, 52, 0.25);
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: linear-gradient(180deg, #f7f3ea, #e7efe4);
      flex: none;
    }
    .brand-mark svg { width: 30px; height: 20px; fill: none; stroke: var(--green); stroke-width: 1.7; }
    .brand-name { font-size: 18px; font-weight: 700; line-height: 1.15; }
    .brand-name small {
      display: block;
      font-size: 11px;
      font-weight: 500;
      color: var(--steel);
      letter-spacing: 0.12em;
    }
    .brand-name em {
      font-style: normal;
      display: block;
      height: 2px;
      width: 42px;
      margin-top: 4px;
      background: linear-gradient(90deg, var(--amber), transparent);
    }
    .nav-links {
      display: flex;
      justify-content: center;
      gap: 4px;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 10px 11px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      color: var(--ink);
      font-size: 15px;
      font-weight: 500;
      border-radius: 5px;
    }
    .nav-links a:hover,
    .nav-links a.is-active {
      color: var(--green);
      background: rgba(44, 74, 52, 0.07);
    }
    .nav-cta { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 5px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--green);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: transform var(--ease), background var(--ease), box-shadow var(--ease), border-color var(--ease), color var(--ease);
      border: 1px solid transparent;
    }
    .btn:active { transform: translateY(1px); }
    .btn-primary {
      background: var(--green);
      color: #fff;
      box-shadow: 0 6px 0 rgba(28, 36, 30, 0.16);
    }
    .btn-primary:hover {
      background: var(--green-deep);
      border-bottom: 2px solid var(--amber);
    }
    .btn-ghost {
      background: transparent;
      color: #fff;
      border-color: rgba(255, 255, 255, 0.45);
    }
    .btn-ghost:hover { border-color: var(--amber); color: var(--amber-soft); }
    .btn-line {
      background: #fff;
      color: var(--green);
      border-color: rgba(94, 103, 112, 0.35);
    }
    .btn-line:hover {
      border-color: var(--amber);
      transform: translateY(-2px);
    }
    .drawer {
      position: fixed;
      inset: 0;
      background: var(--green-night);
      color: #fff;
      transform: translateX(100%);
      transition: transform 240ms ease;
      z-index: 80;
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .drawer.is-open { transform: none; }
    .drawer-top { display: flex; justify-content: space-between; align-items: center; }
    .drawer nav { display: grid; gap: 6px; }
    .drawer nav a {
      min-height: 48px;
      display: flex;
      align-items: center;
      padding: 0 12px;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.04);
    }
    .drawer-close {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      border-radius: 5px;
    }
    .hero {
      position: relative;
      min-height: 78vh;
      overflow: hidden;
      color: #fff;
      isolation: isolate;
    }
    .hero-slides, .hero-slide {
      position: absolute;
      inset: 0;
    }
    .hero-slide {
      background: #15221A center/cover no-repeat;
      opacity: 0;
      transform: scale(1.04);
      transition: opacity 600ms ease, transform 8s linear;
    }
    .hero-slide.is-on {
      opacity: 1;
      transform: scale(1);
      z-index: 1;
    }
    .hero-slide::after {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(21, 34, 26, 0.88) 0%, rgba(21, 34, 26, 0.55) 46%, rgba(21, 34, 26, 0.28) 100%),
        linear-gradient(180deg, rgba(21, 34, 26, 0.2), rgba(21, 34, 26, 0.45));
    }
    .hero-copy {
      position: relative;
      z-index: 3;
      padding: 92px 0 78px;
      width: min(100% - 40px, var(--max));
      margin: 0 auto;
      max-width: 720px;
    }
    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      letter-spacing: 0.18em;
      color: var(--amber-soft);
      margin-bottom: 16px;
      font-weight: 600;
    }
    .hero h1 {
      font-size: clamp(32px, 4.6vw, 52px);
      max-width: 16ch;
      margin-bottom: 18px;
    }
    .hero-lead {
      font-size: 16px;
      line-height: 1.85;
      color: rgba(255, 253, 248, 0.9);
      max-width: 38em;
      margin-bottom: 22px;
    }
    .hero-caption {
      min-height: 32px;
      color: var(--amber-soft);
      font-size: 14px;
      margin-bottom: 18px;
    }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-portrait {
      position: absolute;
      right: max(4vw, calc((100% - var(--max)) / 2));
      top: 54%;
      transform: translateY(-50%);
      width: min(30vw, 340px);
      aspect-ratio: 3 / 4;
      z-index: 4;
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid rgba(200, 150, 42, 0.4);
      box-shadow: 0 12px 0 rgba(0, 0, 0, 0.28);
    }
    .hero-portrait img { width: 100%; height: 100%; object-fit: cover; }
    .hero-ctrl {
      position: absolute;
      z-index: 5;
      bottom: 28px;
      left: 0;
      right: 0;
      width: min(100% - 40px, var(--max));
      margin: 0 auto;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 22px;
      height: 8px;
      border-radius: 2px;
      background: rgba(255, 255, 255, 0.28);
    }
    .dots button.is-on { background: var(--amber); }
    .hero-arrows { margin-left: auto; display: flex; gap: 8px; }
    .hero-arrows button,
    .hero-pause {
      width: 40px;
      height: 40px;
      border: 1px solid rgba(255, 255, 255, 0.28);
      color: #fff;
      border-radius: 4px;
      background: rgba(21, 34, 26, 0.35);
    }
    .hero-arrows button:hover,
    .hero-pause:hover { border-color: var(--amber); color: var(--amber); }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }
    .tag-cloud a {
      font-size: 13px;
      padding: 4px 10px;
      border: 1px solid var(--line);
      border-radius: 4px;
      color: var(--green);
      background: rgba(255, 255, 255, 0.6);
    }
    .tag-cloud a:hover { border-color: var(--amber); color: var(--orange); }
    section { position: relative; }
    .section {
      padding: 96px 0;
      background:
        repeating-linear-gradient(-12deg, transparent, transparent 22px, rgba(44, 74, 52, 0.03) 22px, rgba(44, 74, 52, 0.03) 23px),
        var(--cream);
    }
    .section-paper { background: var(--paper); }
    .section-alt {
      background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 42%, rgba(28, 36, 30, 0.03)),
        #efe8d8;
    }
    .section-dark {
      background: var(--green-night);
      color: #f6f1e6;
      padding: 88px 0;
    }
    .section[id] { scroll-margin-top: 84px; }
    .sec-head { margin-bottom: 28px; max-width: 760px; }
    .sec-head h2 { font-size: clamp(26px, 3vw, 36px); margin-bottom: 12px; }
    .sec-head p { color: var(--muted); font-size: 16px; line-height: 1.8; }
    .section-dark .sec-head p { color: rgba(246, 241, 230, 0.78); }
    .split {
      display: grid;
      grid-template-columns: 1.05fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .frame {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      background: #d7d0c2;
    }
    .frame img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
    .badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 8px; }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 4px;
      background: #fff;
      border: 1px solid var(--line);
      font-size: 13px;
      color: var(--green);
      font-weight: 600;
    }
    .param-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      margin-top: 16px;
      padding: 12px 0 0;
      border-top: 1px solid var(--line);
      font-size: 14px;
      color: var(--green-deep);
      font-weight: 600;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      grid-auto-rows: minmax(150px, auto);
      gap: 22px;
    }
    .m-card {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 22px;
      box-shadow: var(--shadow);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }
    .m-card:hover {
      transform: translateY(-3px);
      border-color: var(--amber);
      box-shadow: var(--shadow-hover);
    }
    .m-card.featured {
      grid-column: span 2;
      grid-row: span 2;
      background:
        linear-gradient(180deg, rgba(21, 34, 26, 0.18), rgba(21, 34, 26, 0.72)),
        url("/assets/images/d77372d1f34e4fc4.jpg") center/cover;
      color: #fff;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      min-height: 360px;
    }
    .m-card h3 { font-size: 22px; margin-bottom: 10px; }
    .m-card li { font-size: 15px; color: var(--muted); line-height: 1.7; }
    .m-card.featured li { color: rgba(255, 255, 255, 0.88); }
    .m-card a.more {
      display: inline-flex;
      margin-top: 12px;
      color: var(--orange);
      font-weight: 600;
      font-size: 14px;
    }
    .m-card.featured a.more { color: var(--amber-soft); }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .adv-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 22px;
      box-shadow: var(--shadow);
      transition: transform var(--ease), border-color var(--ease);
    }
    .adv-card:hover { transform: translateY(-3px); border-color: var(--amber); }
    .adv-ico {
      width: 40px;
      height: 40px;
      margin-bottom: 12px;
      color: var(--green);
    }
    .adv-card h3 { font-size: 18px; margin-bottom: 8px; }
    .adv-card p { font-size: 15px; color: var(--muted); }
    .product-layout {
      display: grid;
      grid-template-columns: 1.15fr 1fr 0.92fr;
      gap: 22px;
      align-items: stretch;
    }
    .p-card {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
      transition: transform var(--ease), border-color var(--ease);
    }
    .p-card:hover { transform: translateY(-4px); border-color: var(--amber); }
    .p-card img { width: 100%; height: 210px; object-fit: cover; }
    .p-card:nth-child(2) img { height: 250px; }
    .p-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .chips { display: flex; flex-wrap: wrap; gap: 6px; }
    .chip {
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      background: #edf3ea;
      color: var(--green);
      border: 1px solid rgba(44, 74, 52, 0.12);
    }
    .p-body p { font-size: 15px; color: var(--muted); }
    .p-body .btn { margin-top: auto; width: 100%; }
    .stat-bar {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      border: 1px solid var(--line);
      background: #fff;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow);
    }
    .stat {
      padding: 28px 18px;
      text-align: center;
      border-right: 1px solid var(--line);
    }
    .stat:last-child { border-right: 0; }
    .stat b {
      display: block;
      font-size: 34px;
      color: var(--green);
      font-variant-numeric: tabular-nums;
      line-height: 1.1;
    }
    .stat span { display: block; color: var(--muted); font-size: 13px; margin-top: 6px; }
    .timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      counter-reset: step;
    }
    .step {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 20px 16px 18px;
      position: relative;
      box-shadow: var(--shadow);
    }
    .step::before {
      counter-increment: step;
      content: counter(step);
      display: inline-flex;
      width: 28px;
      height: 28px;
      border-radius: 4px;
      background: var(--green);
      color: #fff;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step h3 { font-size: 17px; margin-bottom: 8px; }
    .step p { font-size: 14px; color: var(--muted); }
    .insight-grid {
      display: grid;
      grid-template-columns: 1fr 1.05fr;
      gap: 36px;
      align-items: center;
    }
    .quote {
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .insight-list { display: grid; gap: 10px; margin: 16px 0 22px; }
    .insight-list li {
      padding-left: 16px;
      border-left: 3px solid var(--amber);
      color: rgba(246, 241, 230, 0.86);
    }
    .compare {
      display: inline-flex;
      gap: 18px;
      padding: 10px 14px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(200, 150, 42, 0.3);
      border-radius: 6px;
      font-size: 14px;
    }
    .compare b { color: var(--amber-soft); }
    .case-wall {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      grid-template-rows: 220px 220px;
      gap: 16px;
    }
    .case {
      position: relative;
      overflow: hidden;
      border-radius: 10px;
      border: 1px solid var(--line);
      cursor: pointer;
      min-height: 160px;
    }
    .case:nth-child(1),
    .case:nth-child(2) { grid-row: span 2; min-height: 456px; }
    .case img { width: 100%; height: 100%; object-fit: cover; }
    .case figcaption {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      padding: 16px;
      background: linear-gradient(transparent, rgba(21, 34, 26, 0.86));
      color: #fff;
    }
    .case:hover { outline: 1px solid var(--amber); }
    .case small { display: block; opacity: 0.86; font-size: 12px; margin-bottom: 4px; }
    .layer {
      position: fixed;
      inset: 0;
      background: rgba(21, 34, 26, 0.72);
      z-index: 90;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }
    .layer.is-open { display: flex; }
    .layer-card {
      width: min(720px, 100%);
      background: var(--paper);
      border-radius: 12px;
      overflow: hidden;
      position: relative;
      border: 1px solid var(--line);
    }
    .layer-card img { width: 100%; height: 280px; object-fit: cover; }
    .layer-card .txt { padding: 18px 20px 22px; }
    .layer-close {
      position: absolute;
      top: 10px;
      right: 10px;
      width: 44px;
      height: 44px;
      background: rgba(21, 34, 26, 0.7);
      color: #fff;
      border-radius: 4px;
    }
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .story {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 16px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow);
    }
    .story img { width: 100%; height: 100%; object-fit: cover; min-height: 180px; }
    .story blockquote { padding: 18px 18px 16px 0; font-size: 15px; }
    .story cite { display: block; margin-top: 10px; color: var(--green); font-style: normal; font-weight: 700; font-size: 14px; }
    .ops-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: var(--green);
      color: #fff;
      border-radius: 10px;
      overflow: hidden;
    }
    .ops {
      padding: 28px 20px;
      border-right: 1px solid rgba(255, 255, 255, 0.08);
    }
    .ops:last-child { border-right: 0; }
    .ops b { display: block; font-size: 28px; color: var(--amber-soft); }
    .ops span { font-size: 14px; opacity: 0.86; }
    .review-wrap {
      display: grid;
      grid-template-columns: 0.8fr 1.4fr;
      gap: 24px;
    }
    .rank {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow);
    }
    .rank h3 { padding: 16px 16px 8px; font-size: 18px; }
    .rank li {
      display: grid;
      grid-template-columns: 28px 1fr auto;
      gap: 8px;
      padding: 10px 16px;
      border-top: 1px solid var(--line);
      font-size: 14px;
      align-items: center;
    }
    .rank i {
      font-style: normal;
      width: 22px;
      height: 22px;
      display: grid;
      place-items: center;
      background: var(--green);
      color: #fff;
      border-radius: 3px;
      font-size: 12px;
    }
    .rank em { font-style: normal; color: var(--orange); font-size: 12px; }
    .review-grid { display: grid; gap: 14px; }
    .review {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 16px 18px;
    }
    .stars { color: var(--amber); letter-spacing: 2px; font-size: 13px; }
    .label {
      display: inline-block;
      margin-left: 8px;
      font-size: 12px;
      padding: 1px 7px;
      border: 1px solid rgba(216, 107, 42, 0.35);
      color: var(--orange);
      border-radius: 3px;
    }
    .review p { margin-top: 8px; font-size: 15px; }
    .news-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 18px;
    }
    .news-feature {
      position: relative;
      min-height: 320px;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--line);
    }
    .news-feature img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
    .news-feature div {
      position: absolute;
      inset: auto 0 0 0;
      padding: 18px;
      background: linear-gradient(transparent, rgba(21, 34, 26, 0.88));
      color: #fff;
    }
    .news-list li {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px solid var(--line);
    }
    .news-list time { color: var(--green); font-weight: 700; font-size: 14px; }
    .news-list h3 { font-size: 17px; }
    .news-list p { font-size: 14px; color: var(--muted); }
    .news-more { margin-top: 12px; display: inline-flex; }
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 12px;
    }
    .partner {
      min-height: 86px;
      border: 1px solid var(--line);
      border-radius: 8px;
      overflow: hidden;
      position: relative;
      filter: grayscale(1);
      opacity: 0.78;
      transition: filter var(--ease), opacity var(--ease), transform var(--ease);
    }
    .partner img { width: 100%; height: 86px; object-fit: cover; }
    .partner span {
      position: absolute;
      inset: auto 0 0 0;
      background: rgba(252, 250, 246, 0.9);
      font-size: 12px;
      padding: 4px 6px;
      text-align: center;
      color: var(--green);
      font-weight: 600;
    }
    .partner:hover { filter: none; opacity: 1; transform: translateY(-2px); }
    .faq-list { display: grid; gap: 10px; }
    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-q {
      width: 100%;
      text-align: left;
      min-height: 56px;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-weight: 650;
    }
    .faq-q:hover { color: var(--green); }
    .faq-icon {
      width: 28px;
      height: 28px;
      border: 1px solid var(--line);
      border-radius: 4px;
      display: grid;
      place-items: center;
      flex: none;
      transition: transform 200ms ease;
    }
    .faq-item.is-open .faq-icon { transform: rotate(45deg); border-color: var(--amber); }
    .faq-a {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 200ms ease;
    }
    .faq-item.is-open .faq-a { grid-template-rows: 1fr; }
    .faq-a > div { overflow: hidden; }
    .faq-a p { padding: 0 16px 16px; color: var(--muted); font-size: 15px; }
    .promise-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .promise {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 18px;
      display: grid;
      grid-template-columns: 36px 1fr;
      gap: 10px;
      align-items: start;
      box-shadow: var(--shadow);
    }
    .promise svg { width: 32px; height: 32px; stroke: var(--green); fill: none; stroke-width: 1.7; }
    .promise h3 { font-size: 16px; }
    .promise p { font-size: 14px; color: var(--muted); }
    .contact-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 28px;
      align-items: stretch;
    }
    .contact-side {
      background: var(--green);
      color: #fff;
      border-radius: 12px;
      padding: 28px;
      box-shadow: var(--shadow);
    }
    .contact-side h2 { margin-bottom: 12px; }
    .contact-side p { color: rgba(255, 255, 255, 0.86); margin-bottom: 16px; }
    .contact-side dl { display: grid; gap: 10px; font-size: 15px; }
    .contact-side dt { color: var(--amber-soft); font-size: 12px; letter-spacing: 0.08em; }
    .contact-side a { color: #fff; }
    .contact-side a:hover { color: var(--amber-soft); }
    .contact-photo {
      margin-top: 18px;
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid rgba(200, 150, 42, 0.3);
    }
    .contact-photo img { width: 100%; height: 170px; object-fit: cover; }
    .form {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow);
    }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 14px; font-weight: 600; color: var(--green-deep); }
    input, select, textarea {
      width: 100%;
      border: 1px solid rgba(94, 103, 112, 0.28);
      border-radius: 12px;
      padding: 10px 12px;
      background: var(--paper);
      min-height: 44px;
    }
    textarea { min-height: 110px; resize: vertical; }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--green);
      box-shadow: 0 0 0 3px rgba(44, 74, 52, 0.12);
    }
    .field.error input,
    .field.error select,
    .field.error textarea { border-color: var(--orange); }
    .err { color: var(--orange); font-size: 12px; display: none; }
    .field.error .err { display: block; }
    .form-note { font-size: 13px; color: var(--muted); margin-top: 8px; }
    .form-ok {
      display: none;
      margin-top: 10px;
      padding: 10px 12px;
      background: #edf3ea;
      color: var(--green);
      border-radius: 6px;
    }
    .site-footer {
      background: #121a14;
      color: #d9d3c6;
      padding: 56px 0 24px;
    }
    .foot-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1.1fr 0.9fr;
      gap: 28px;
      margin-bottom: 28px;
    }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
    .site-footer a { display: inline-block; min-height: 32px; color: #d9d3c6; }
    .site-footer a:hover { color: var(--amber-soft); }
    .copy {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 16px;
      font-size: 13px;
      color: #9aa198;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }
    @media (max-width: 1280px) {
      .hero-portrait { width: 280px; right: 24px; }
      .product-layout, .matrix-grid { gap: 16px; }
    }
    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .menu-toggle { display: inline-flex; }
      .nav-inner { grid-template-columns: auto auto; justify-content: space-between; }
      .hero-portrait { display: none; }
      .hero { min-height: 68vh; }
      .split, .insight-grid, .story-grid, .review-wrap, .news-grid, .contact-grid, .foot-grid {
        grid-template-columns: 1fr 1fr;
      }
      .matrix-grid { grid-template-columns: 1fr 1fr; }
      .m-card.featured { grid-column: span 2; grid-row: span 1; min-height: 280px; }
      .product-layout, .adv-grid, .timeline, .stat-bar, .ops-bar, .promise-grid, .partner-grid {
        grid-template-columns: 1fr 1fr;
      }
      .case-wall { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
      .case:nth-child(1), .case:nth-child(2) { grid-row: auto; min-height: 240px; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      body { font-size: 16px; }
      .section, .section-dark { padding: 56px 0; }
      .container, .hero-copy { width: min(100% - 28px, var(--max)); }
      .hero-copy { padding: 64px 0 86px; max-width: none; }
      .hero-arrows { display: none; }
      .split, .insight-grid, .story-grid, .review-wrap, .news-grid, .contact-grid, .product-layout, .adv-grid, .timeline, .stat-bar, .ops-bar, .form-grid, .foot-grid {
        grid-template-columns: 1fr;
      }
      .story { grid-template-columns: 1fr; }
      .story img { min-height: 200px; }
      .matrix-grid, .partner-grid, .promise-grid { grid-template-columns: 1fr 1fr; }
      .stat, .ops { border-right: 0; border-bottom: 1px solid var(--line); }
      .ops { border-bottom-color: rgba(255,255,255,.08); }
      .top-quick { width: 100%; }
      .nav-cta .btn { display: none; }
    }
    @media (max-width: 375px) {
      .container { width: min(100% - 20px, var(--max)); }
      .hero h1 { font-size: 28px; }
      .matrix-grid, .partner-grid, .case-wall { grid-template-columns: 1fr; }
      .m-card.featured { grid-column: auto; }
      .btn { width: 100%; }
      .hero-actions { flex-direction: column; }
      .hero-actions .btn { width: calc(100% - 4px); }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      * { transition: none !important; animation: none !important; }
    }

/* roulang page: index */
:root {
      --green: #2C4A34;
      --green-deep: #22382a;
      --green-hover: #1c3124;
      --night: #15221A;
      --amber: #C8962A;
      --amber-soft: #e8d7a8;
      --orange: #D86B2A;
      --steel: #5E6770;
      --ink: #1C241E;
      --muted: #5d675f;
      --straw: #F3EEE4;
      --paper: #FCFAF6;
      --white: #fffdf8;
      --line: rgba(94, 103, 112, 0.14);
      --radius-card: 10px;
      --radius-btn: 5px;
      --shadow: 0 8px 0 rgba(28, 36, 30, 0.03), 0 10px 18px rgba(28, 36, 30, 0.08);
      --shadow-hover: 0 12px 0 rgba(28, 36, 30, 0.03), 0 14px 22px rgba(28, 36, 30, 0.1);
      --w: 1220px;
      --nav-h: 68px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 17px;
      line-height: 1.8;
      color: var(--ink);
      background: var(--straw);
      overflow-x: hidden;
    }
    body.lock { overflow: hidden; }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, p { margin: 0; }
    ul { margin: 0; padding: 0; list-style: none; }
    .container { width: min(var(--w), calc(100% - 40px)); margin: 0 auto; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 20px; border-radius: var(--radius-btn);
      border: 1px solid transparent; font-size: 15px; font-weight: 600;
      transition: background .2s, border-color .2s, transform .2s, color .2s, box-shadow .2s;
    }
    .btn:focus-visible, .nav-list a:focus-visible, .topbar a:focus-visible, .faq-q:focus-visible, .icon-btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .reel-item:focus-visible {
      outline: 2px solid var(--amber);
      outline-offset: 3px;
    }
    .btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 14px rgba(44, 74, 52, 0.18); }
    .btn-primary:hover { background: var(--green-hover); transform: translateY(-2px); box-shadow: 0 0 0 1px var(--amber), 0 10px 16px rgba(44, 74, 52, 0.2); }
    .btn-primary:active { transform: translateY(0); }
    .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
    .btn-ghost:hover { border-color: var(--amber); color: var(--amber-soft); }
    .btn-line { background: transparent; color: var(--ink); border-color: rgba(94,103,112,.35); }
    .btn-line:hover { border-color: var(--green); color: var(--green); transform: translateY(-2px); }
    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      min-height: 34px; padding: 0 12px; border-radius: 4px;
      background: rgba(44,74,52,.08); color: var(--green); font-size: 13px; font-weight: 600;
      border: 1px solid rgba(44,74,52,.12);
    }
    .chip {
      display: inline-flex; align-items: center; min-height: 30px; padding: 0 10px;
      border-radius: 4px; background: var(--straw); color: var(--steel); font-size: 12px; font-weight: 600;
      border: 1px solid var(--line);
    }
    .section { padding: 96px 0; position: relative; }
    .section-head { margin-bottom: 36px; max-width: 760px; }
    .section-head.wide { max-width: none; display: flex; justify-content: space-between; gap: 24px; align-items: end; }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--amber); font-size: 13px; font-weight: 700; letter-spacing: .12em;
      margin-bottom: 10px;
    }
    .kicker::before { content: ""; width: 18px; height: 2px; background: var(--amber); }
    h2 { font-size: 32px; line-height: 1.28; font-weight: 700; color: var(--ink); }
    .lead { margin-top: 14px; color: var(--muted); font-size: 16px; line-height: 1.85; }
    .ridge { background-image: repeating-linear-gradient(90deg, transparent, transparent 46px, rgba(44,74,52,.035) 46px, rgba(44,74,52,.035) 47px); }
    .metal { background-image: repeating-linear-gradient(135deg, rgba(28,36,30,.035) 0 1px, transparent 1px 7px); }

    .site-header { position: relative; z-index: 50; }
    .topbar { background: var(--green); color: #e8eadc; font-size: 13px; }
    .topbar-inner {
      width: min(var(--w), calc(100% - 40px));
      margin: 0 auto; min-height: 38px;
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
    }
    .topbar-left, .topbar-right { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
    .topbar a { color: #e8eadc; }
    .topbar a:hover { color: var(--amber-soft); }
    .dot-split::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--amber); display: inline-block; margin-right: 8px; vertical-align: middle; }
    .navbar {
      background: var(--paper);
      border-bottom: 1px solid var(--line);
      position: sticky; top: 0; z-index: 60;
      transition: box-shadow .2s;
    }
    .navbar.is-stuck { box-shadow: 0 8px 18px rgba(28,36,30,.08); }
    .navbar-inner {
      width: min(var(--w), calc(100% - 40px));
      margin: 0 auto; min-height: var(--nav-h);
      display: flex; align-items: center; gap: 20px;
    }
    .logo { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--ink); }
    .logo svg { width: 36px; height: 36px; }
    .logo-text { display: flex; flex-direction: column; line-height: 1.1; }
    .logo-text b { font-size: 18px; font-weight: 700; }
    .logo-text span { font-size: 12px; color: var(--steel); letter-spacing: .18em; margin-top: 3px; }
    .nav-list { display: flex; align-items: center; gap: 4px; margin-left: auto; }
    .nav-list a {
      display: flex; align-items: center; min-height: 44px; padding: 0 10px;
      font-size: 14px; font-weight: 600; color: var(--steel); border-radius: 4px;
    }
    .nav-list a:hover, .nav-list a.is-active { color: var(--green); background: rgba(44,74,52,.06); }
    .nav-cta { margin-left: 8px; flex: 0 0 auto; }
    .nav-toggle {
      display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line);
      background: var(--white); border-radius: 5px; align-items: center; justify-content: center; flex-direction: column; gap: 5px;
    }
    .nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); }
    .nav-drawer, .nav-mask { display: none; }
    .icon-btn {
      width: 44px; height: 44px; border-radius: 5px; border: 1px solid rgba(255,255,255,.28);
      background: rgba(21,34,26,.35); color: #fff; display: inline-flex; align-items: center; justify-content: center;
    }
    .icon-btn:hover { border-color: var(--amber); color: var(--amber-soft); }

    .hero { padding: 0; position: relative; background: var(--night); }
    .hero-frame { position: relative; min-height: 92vh; overflow: hidden; }
    .slides { position: absolute; inset: 0; }
    .slide {
      position: absolute; inset: 0; opacity: 0; transition: opacity .7s ease;
      background-size: cover; background-position: center 38%;
    }
    .slide.is-on { opacity: 1; }
    .slide::after {
      content: ""; position: absolute; inset: 0;
      background:
        linear-gradient(180deg, rgba(21,34,26,.18) 0%, rgba(21,34,26,.12) 38%, rgba(21,34,26,.78) 100%),
        linear-gradient(90deg, rgba(21,34,26,.55) 0%, rgba(21,34,26,.12) 55%, rgba(21,34,26,.35) 100%);
    }
    .hero-content {
      position: relative; z-index: 5;
      width: min(var(--w), calc(100% - 40px));
      margin: 0 auto;
      min-height: 92vh;
      display: flex; flex-direction: column; justify-content: flex-end;
      padding: 96px 0 92px;
      max-width: 680px;
      margin-left: max(20px, calc((100% - var(--w)) / 2));
    }
    .brand-mark {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--amber-soft); font-size: 13px; font-weight: 700; letter-spacing: .18em; margin-bottom: 14px;
    }
    .brand-mark i { width: 8px; height: 8px; background: var(--orange); display: inline-block; border-radius: 1px; }
    .hero h1 { color: #fff; font-size: 46px; line-height: 1.16; font-weight: 700; max-width: 12em; }
    .hero-lead { margin-top: 16px; color: #d7ddd4; font-size: 16px; line-height: 1.85; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
    .hero-caption { margin-top: 18px; color: #c5cdc3; font-size: 13px; font-weight: 600; letter-spacing: .08em; }
    .hero-controls {
      position: absolute; z-index: 6; left: 0; right: 0; bottom: 28px;
      width: min(var(--w), calc(100% - 40px)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
    }
    .dots { display: flex; gap: 8px; }
    .dots button { width: 28px; height: 4px; border: 0; padding: 0; background: rgba(255,255,255,.35); border-radius: 1px; }
    .dots button.is-on { background: var(--amber); }
    .hero-arrows { display: flex; gap: 8px; }
    .hero-arrows .icon-btn { width: 40px; height: 40px; }
    .reel {
      position: absolute; z-index: 6; top: 50%; transform: translateY(-50%);
      right: max(20px, calc((100% - var(--w)) / 2));
      display: flex; flex-direction: column; gap: 10px;
    }
    .reel-item {
      width: 74px; height: 108px; padding: 0; border: 2px solid rgba(255,255,255,.28);
      border-radius: 8px; overflow: hidden; background: #000;
    }
    .reel-item img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.9); }
    .reel-item.is-on { border-color: var(--amber); box-shadow: 0 8px 16px rgba(0,0,0,.28); }

    .tag-rail { background: #e8e1d2; border-bottom: 1px solid var(--line); padding: 14px 0; }
    .tag-rail-inner { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-rail a {
      min-height: 36px; padding: 0 12px; display: inline-flex; align-items: center;
      border: 1px solid rgba(44,74,52,.16); border-radius: 4px; background: var(--paper);
      font-size: 13px; font-weight: 600; color: var(--green);
    }
    .tag-rail a:hover { border-color: var(--amber); color: var(--ink); }

    #matrix { background: var(--straw); }
    .matrix-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .m-card {
      background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-card);
      padding: 22px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s, border-color .2s;
    }
    .m-card:hover { transform: translateY(-3px); border-color: var(--amber); box-shadow: var(--shadow-hover); }
    .m-card.feature {
      grid-column: span 2; grid-row: span 2; color: #fff; position: relative; overflow: hidden; min-height: 340px;
      background: var(--green) url("/assets/images/dceda43616e1734d.webp") center/cover no-repeat;
    }
    .m-card.feature::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(21,34,26,.18), rgba(21,34,26,.82)); }
    .m-card.feature > * { position: relative; z-index: 1; }
    .m-card h3 { font-size: 20px; margin-bottom: 10px; }
    .m-card p, .m-card li { font-size: 14px; line-height: 1.75; color: var(--muted); }
    .m-card.feature p, .m-card.feature li { color: #d7ddd4; }
    .m-card ul { margin: 8px 0 16px; }
    .m-card li { padding-left: 14px; position: relative; margin-bottom: 6px; }
    .m-card li::before { content: ""; width: 6px; height: 6px; background: var(--amber); position: absolute; left: 0; top: .55em; }
    .m-link { font-size: 13px; font-weight: 700; color: var(--green); }
    .m-card.feature .m-link { color: var(--amber-soft); }

    #intro { background: var(--paper); }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .intro-pic { position: relative; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
    .intro-pic img { width: 100%; height: 460px; object-fit: cover; }
    .intro-pic figcaption {
      position: absolute; left: 12px; bottom: 12px; background: rgba(21,34,26,.78); color: #fff;
      font-size: 12px; padding: 6px 10px; border-radius: 4px;
    }
    .intro-copy p { color: var(--muted); }
    .intro-copy p + p { margin-top: .95em; }
    .param-strip { margin-top: 22px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .param-strip div { background: var(--straw); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
    .param-strip b { display: block; font-size: 18px; color: var(--green); }
    .param-strip span { font-size: 12px; color: var(--steel); }
    .badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

    #nearby { background: var(--straw); }
    .near-track { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 16px; }
    .near-card {
      position: relative; overflow: hidden; min-height: 280px; border-radius: 12px;
      border: 1px solid var(--line); box-shadow: var(--shadow); color: #fff; display: flex; align-items: flex-end;
    }
    .near-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
    .near-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(21,34,26,.88)); }
    .near-body { position: relative; z-index: 1; padding: 20px; }
    .near-body h3 { font-size: 20px; margin-bottom: 6px; }
    .near-body p { font-size: 14px; color: #d5dbd2; }
    .near-tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
    .near-tags span { font-size: 11px; background: rgba(255,255,255,.16); padding: 2px 8px; border-radius: 3px; }

    #models { background: var(--paper); }
    .product-grid { display: grid; grid-template-columns: 1.25fr .9fr .9fr; gap: 20px; }
    .p-card {
      background: var(--white); border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
      box-shadow: var(--shadow); display: flex; flex-direction: column; transition: transform .2s, border-color .2s;
    }
    .p-card:hover { transform: translateY(-4px); border-color: var(--amber); }
    .p-card img { width: 100%; height: 210px; object-fit: cover; }
    .p-card.tall img { height: 280px; }
    .p-body { padding: 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
    .p-body h3 { font-size: 20px; }
    .p-body p { font-size: 14px; color: var(--muted); }
    .chips { display: flex; flex-wrap: wrap; gap: 6px; }
    .p-body .btn { margin-top: auto; align-self: flex-start; }

    #reviews { background: var(--straw); }
    .review-layout { display: grid; grid-template-columns: 1.4fr .8fr; gap: 24px; }
    .review-track { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
    .review-card {
      min-width: min(340px, 84vw); scroll-snap-align: start; background: var(--paper);
      border: 1px solid var(--line); border-radius: 10px; padding: 20px; box-shadow: var(--shadow);
    }
    .stars { color: var(--amber); letter-spacing: 2px; font-size: 14px; margin-bottom: 8px; }
    .tag-rec { display: inline-block; font-size: 12px; font-weight: 700; color: var(--green); background: rgba(44,74,52,.08); padding: 2px 8px; border-radius: 3px; margin-bottom: 10px; }
    .review-card p { font-size: 14px; color: var(--muted); }
    .review-card .who { margin-top: 12px; font-size: 13px; color: var(--steel); font-weight: 600; }
    .rank { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 18px; box-shadow: var(--shadow); }
    .rank h3 { font-size: 16px; margin-bottom: 12px; }
    .rank-row { display: grid; grid-template-columns: 28px 1fr auto; gap: 8px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
    .rank-row b { color: var(--amber); }
    .trend { color: var(--green); font-weight: 700; }

    #advantages { background: var(--paper); }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .adv-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 24px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s; }
    .adv-card:hover { transform: translateY(-3px); border-color: var(--amber); }
    .adv-ico { width: 42px; height: 42px; border-radius: 6px; display: flex; align-items: center; justify-content: center; background: rgba(44,74,52,.08); color: var(--green); margin-bottom: 14px; }
    .adv-card h3 { font-size: 18px; margin-bottom: 8px; }
    .adv-card p { font-size: 14px; color: var(--muted); line-height: 1.8; }

    #stats { background: #efe8d8; padding: 42px 0; }
    .stat-bar { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .stat-item { padding: 8px 8px 8px 16px; border-left: 3px solid var(--amber); }
    .stat-item b { display: block; font-size: 32px; line-height: 1.1; color: var(--green); font-weight: 700; }
    .stat-item span { display: block; font-size: 13px; color: var(--steel); margin-top: 6px; }

    #guarantee { background: var(--paper); padding: 48px 0; }
    .pledge { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .pledge-item { display: grid; grid-template-columns: 42px 1fr; gap: 12px; background: var(--straw); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
    .pledge-item svg { color: var(--green); }
    .pledge-item h3 { font-size: 15px; }
    .pledge-item p { font-size: 13px; color: var(--muted); }

    #plan { background: var(--straw); }
    .timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; position: relative; }
    .timeline::before { content: ""; position: absolute; left: 6%; right: 6%; top: 27px; height: 2px; background: rgba(44,74,52,.16); }
    .step { position: relative; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 22px 18px 18px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s; }
    .step:hover { border-color: var(--amber); transform: translateY(-3px); }
    .step-no { width: 34px; height: 34px; border-radius: 4px; background: var(--green); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; margin-bottom: 12px; }
    .step h3 { font-size: 16px; margin-bottom: 8px; }
    .step p { font-size: 14px; color: var(--muted); }

    #idea { background: var(--night); color: #e7ece4; padding: 0; }
    .idea-grid { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 520px; }
    .idea-copy { padding: 92px 48px 92px 0; display: flex; flex-direction: column; justify-content: center; }
    .idea-copy h2 { color: #fff; font-size: 34px; max-width: 12em; }
    .idea-copy .lead { color: #c5cdc3; }
    .idea-points { margin-top: 22px; }
    .idea-points li { padding: 10px 0 10px 18px; position: relative; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 15px; }
    .idea-points li::before { content: ""; width: 8px; height: 8px; background: var(--amber); position: absolute; left: 0; top: 18px; }
    .compare { margin-top: 24px; display: flex; gap: 24px; align-items: end; flex-wrap: wrap; }
    .compare b { font-size: 36px; color: var(--amber-soft); display: block; line-height: 1; }
    .compare span { font-size: 13px; color: #b7c0b4; }
    .idea-pic { position: relative; min-height: 420px; }
    .idea-pic img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }

    #cases { background: var(--straw); }
    .case-wall { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 170px; gap: 14px; }
    .case-tile {
      position: relative; overflow: hidden; border-radius: 10px; border: 1px solid var(--line);
      cursor: pointer; box-shadow: var(--shadow); padding: 0; text-align: left; color: #fff;
    }
    .case-tile img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); transition: transform .35s; }
    .case-tile:hover img { transform: scale(1.07); }
    .case-tile:hover { border-color: var(--amber); }
    .case-tile:nth-child(1) { grid-column: span 2; grid-row: span 2; }
    .case-tile:nth-child(2) { grid-column: span 2; }
    .case-info { position: absolute; inset: auto 0 0 0; padding: 14px 14px 12px; background: linear-gradient(180deg, transparent, rgba(21,34,26,.86)); }
    .case-info h3 { font-size: 16px; }
    .case-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
    .case-tags span { font-size: 11px; background: rgba(255,255,255,.14); padding: 2px 7px; border-radius: 3px; }
    .case-info p { font-size: 13px; color: #d5dbd2; }
    .layer { position: fixed; inset: 0; background: rgba(21,34,26,.62); z-index: 80; display: none; align-items: center; justify-content: center; padding: 24px; }
    .layer.show { display: flex; }
    .layer-card { width: min(720px, 100%); background: var(--paper); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-hover); position: relative; }
    .layer-card img { width: 100%; height: 260px; object-fit: cover; }
    .layer-body { padding: 22px; }
    .layer-close { position: absolute; top: 10px; right: 10px; width: 44px; height: 44px; border: 0; border-radius: 4px; background: rgba(21,34,26,.72); color: #fff; font-size: 22px; }

    #stories { background: var(--paper); }
    .story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .story { display: grid; grid-template-columns: 168px 1fr; overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
    .story img { width: 100%; height: 100%; object-fit: cover; min-height: 220px; }
    .story-body { padding: 24px; }
    .story-body h3 { font-size: 16px; margin-bottom: 6px; }
    .story-body .who { font-size: 13px; color: var(--steel); margin-bottom: 12px; }
    .story-body q { font-size: 15px; color: var(--muted); }

    #ops { background: var(--night); color: #e7ece4; }
    .ops-grid { display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 40px; align-items: center; }
    .ops-nums { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .ops-num { border: 1px solid rgba(255,255,255,.1); border-radius: 10px; padding: 18px; background: rgba(255,255,255,.03); }
    .ops-num b { display: block; font-size: 28px; color: var(--amber-soft); }
    .ops-num span { font-size: 13px; color: #b7c0b4; }
    .ops-copy h2 { color: #fff; }
    .ops-copy .lead { color: #c5cdc3; }

    #news { background: var(--paper); }
    .news-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; }
    .news-feature { position: relative; border-radius: 12px; overflow: hidden; min-height: 360px; border: 1px solid var(--line); }
    .news-feature img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .news-feature .nf { position: absolute; inset: auto 0 0 0; padding: 22px; background: linear-gradient(180deg, transparent, rgba(21,34,26,.88)); color: #fff; }
    .news-item { display: grid; grid-template-columns: 92px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .news-item time { font-size: 13px; color: var(--steel); font-weight: 700; }
    .news-item h3 { font-size: 16px; }
    .news-item p { font-size: 13px; color: var(--muted); margin-top: 4px; }
    .more-link { display: inline-flex; margin-top: 16px; font-size: 14px; font-weight: 700; color: var(--green); }

    #partners { background: var(--straw); }
    .partner-wall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
    .partner { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; min-height: 92px; position: relative; display: flex; align-items: flex-end; }
    .partner img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.05); opacity: .55; transition: filter .25s, opacity .25s; }
    .partner:hover img { filter: grayscale(0); opacity: .9; }
    .partner span { position: relative; z-index: 1; width: 100%; padding: 8px 10px; font-size: 12px; font-weight: 700; background: rgba(252,250,246,.88); color: var(--green); }

    #faq { background: var(--paper); }
    .faq-list { display: flex; flex-direction: column; gap: 10px; }
    .faq-item { border: 1px solid var(--line); border-radius: 8px; background: var(--white); overflow: hidden; }
    .faq-q {
      width: 100%; text-align: left; background: transparent; border: 0; min-height: 56px;
      padding: 14px 52px 14px 18px; font-size: 16px; font-weight: 700; color: var(--ink); position: relative;
    }
    .faq-q::after {
      content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
      width: 28px; height: 28px; border: 1px solid var(--line); display: flex; align-items: center; justify-content: center;
      color: var(--green); font-size: 20px; line-height: 1; border-radius: 4px;
    }
    .faq-item.open .faq-q::after { content: "–"; background: var(--green); color: #fff; border-color: var(--green); }
    .faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .2s ease; }
    .faq-item.open .faq-a { grid-template-rows: 1fr; }
    .faq-a > div { overflow: hidden; }
    .faq-a p { padding: 0 18px 16px; color: var(--muted); font-size: 15px; }

    #contact { background: var(--green); color: #e7ece4; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 36px; align-items: stretch; }
    .contact-info h2 { color: #fff; }
    .contact-info .lead { color: #c9d2c6; }
    .info-list { margin-top: 22px; display: flex; flex-direction: column; gap: 12px; }
    .info-list li { font-size: 15px; }
    .info-list a:hover { color: var(--amber-soft); }
    .contact-aside { margin-top: 22px; border-radius: 10px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); }
    .contact-aside img { width: 100%; height: 180px; object-fit: cover; }
    .form-card { background: var(--paper); color: var(--ink); border-radius: 12px; padding: 26px; box-shadow: var(--shadow-hover); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; color: var(--ink); }
    input, select, textarea {
      width: 100%; border: 1px solid rgba(94,103,112,.28); border-radius: 12px; background: #fff;
      min-height: 44px; padding: 8px 12px; font-size: 15px; color: var(--ink);
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(44,74,52,.12); outline: none; }
    .field.error input, .field.error select, .field.error textarea { border-color: var(--orange); }
    .err { display: none; color: var(--orange); font-size: 12px; }
    .field.error .err { display: block; }
    .form-note { font-size: 13px; color: var(--steel); margin: 8px 0 0; }
    .form-ok { display: none; margin-top: 12px; padding: 10px 12px; background: rgba(44,74,52,.08); color: var(--green); font-size: 14px; border-radius: 6px; }
    .form-ok.show { display: block; }

    .site-footer { background: #10180f; color: #c5cdc3; padding: 56px 0 28px; font-size: 14px; }
    .foot-grid { display: grid; grid-template-columns: 1.3fr .9fr 1.1fr .9fr; gap: 28px; }
    .foot-brand strong { display: block; color: #fff; font-size: 18px; margin-bottom: 10px; }
    .foot-grid h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
    .foot-grid a { display: inline-block; min-height: 32px; color: #c5cdc3; }
    .foot-grid a:hover { color: var(--amber-soft); }
    .foot-bottom { margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.08); display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between; color: #9aa398; font-size: 13px; }

    @media (max-width: 1280px) {
      h2 { font-size: 28px; }
      .hero h1 { font-size: 40px; }
      .product-grid { grid-template-columns: 1fr 1fr 1fr; }
    }
    @media (max-width: 1024px) {
      .section { padding: 76px 0; }
      .nav-list, .nav-cta, .reel, .hero-arrows { display: none; }
      .nav-toggle { display: inline-flex; }
      .nav-mask { display: block; position: fixed; inset: 0; background: rgba(21,34,26,.45); opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 70; }
      .nav-drawer {
        display: flex; flex-direction: column; gap: 4px; position: fixed; top: 0; right: 0;
        width: min(360px, 88vw); height: 100%; background: var(--paper); z-index: 71; padding: 18px 16px 24px;
        transform: translateX(100%); transition: transform .25s ease; box-shadow: var(--shadow-hover);
      }
      body.nav-open .nav-drawer { transform: translateX(0); }
      body.nav-open .nav-mask { opacity: 1; pointer-events: auto; }
      .drawer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
      .nav-drawer a { min-height: 48px; display: flex; align-items: center; padding: 0 12px; border-radius: 6px; font-weight: 600; }
      .intro-grid, .idea-grid, .ops-grid, .review-layout, .news-grid, .contact-grid, .story, .near-track { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr 1fr; }
      .m-card.feature { grid-column: span 2; grid-row: auto; min-height: 260px; }
      .adv-grid { grid-template-columns: 1fr 1fr; }
      .product-grid { grid-template-columns: 1fr; }
      .stat-bar { grid-template-columns: 1fr 1fr; gap: 18px; }
      .timeline { grid-template-columns: 1fr; }
      .timeline::before { display: none; }
      .case-wall { grid-template-columns: 1fr 1fr; grid-auto-rows: 190px; }
      .case-tile:nth-child(1), .case-tile:nth-child(2) { grid-column: span 2; }
      .partner-wall { grid-template-columns: repeat(4, 1fr); }
      .pledge { grid-template-columns: 1fr 1fr; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .idea-copy { padding: 64px 0 24px; }
      .idea-pic { min-height: 280px; }
      .idea-pic img { position: relative; height: 280px; }
      .near-card { min-height: 240px; }
    }
    @media (max-width: 768px) {
      .section { padding: 58px 0; }
      body { font-size: 16px; }
      .container, .topbar-inner, .navbar-inner, .hero-content, .hero-controls { width: min(var(--w), calc(100% - 32px)); }
      .hero-frame, .hero-content { min-height: 78vh; }
      .hero h1 { font-size: 30px; max-width: none; }
      .hero-content { padding: 72px 0 88px; margin-left: auto; margin-right: auto; }
      .param-strip, .ops-nums, .form-grid { grid-template-columns: 1fr; }
      .adv-grid, .matrix-grid { grid-template-columns: 1fr; }
      .m-card.feature { grid-column: auto; }
      .case-wall { grid-template-columns: 1fr; grid-auto-rows: 220px; }
      .case-tile:nth-child(1), .case-tile:nth-child(2) { grid-column: auto; }
      .partner-wall { grid-template-columns: 1fr 1fr; }
      .foot-grid { grid-template-columns: 1fr; }
      .section-head.wide { flex-direction: column; align-items: flex-start; }
      .intro-pic img { height: 240px; }
    }
    @media (max-width: 520px) {
      .hero h1 { font-size: 26px; }
      h2 { font-size: 24px; }
      .stat-bar, .pledge { grid-template-columns: 1fr; }
      .hero-actions .btn { width: 100%; }
      .topbar-right { display: none; }
    }
    @media (max-width: 375px) {
      .logo-text span { display: none; }
    }