/* roulang page: index */
:root {
      --pine: #1F3A32;
      --pine-deep: #162922;
      --copper: #B08A5B;
      --copper-deep: #8E6D45;
      --paper: #F7F4EE;
      --mist: #EEF1EC;
      --graphite: #141816;
      --ink: #1A1C1B;
      --mute: #5C635E;
      --line: rgba(31, 58, 50, 0.12);
      --line-strong: rgba(176, 138, 91, 0.45);
      --cream: #F3EDE2;
      --white: #FFFdf8;
      --radius: 8px;
      --shadow: 0 8px 24px rgba(20, 24, 22, 0.06);
      --space: 28px;
      --max: 1260px;
      --header-top: 38px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 17px;
      line-height: 1.8;
      color: var(--ink);
      background: var(--paper);
      padding-bottom: 84px;
    }
    img { max-width: 100%; display: block; height: auto; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4 {
      font-family: "Noto Serif SC", "Noto Serif CJK SC", serif;
      letter-spacing: 0.02em;
      line-height: 1.28;
      font-weight: 600;
      color: var(--ink);
    }
    .container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
    .skip {
      position: absolute; left: -999px; top: 8px;
      background: var(--pine); color: #fff; padding: 8px 14px;
    }
    .skip:focus { left: 12px; z-index: 80; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 48px; padding: 0 22px;
      border: 1px solid var(--pine); border-radius: 4px;
      font-size: 15px; font-weight: 600; letter-spacing: 0.04em;
      transition: 0.22s ease; white-space: nowrap;
    }
    .btn-solid { background: var(--pine); color: #f6f1e8; }
    .btn-solid:hover, .btn-solid:active { background: var(--copper); border-color: var(--copper); color: #fff; }
    .btn-ghost { background: transparent; color: #f6f1e8; border-color: rgba(246,241,232,.55); }
    .btn-ghost:hover { border-color: var(--copper); color: var(--copper); }
    .btn-line { background: transparent; color: var(--pine); }
    .btn-line:hover { background: var(--pine); color: #f6f1e8; }
    .btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      outline: 2px solid var(--copper); outline-offset: 3px;
    }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--copper-deep); font-size: 13px; letter-spacing: 0.16em;
      text-transform: none; font-weight: 600;
    }
    .kicker::before {
      content: ""; width: 18px; height: 1px; background: var(--copper);
    }
    .section { padding: 118px 0; }
    .section-mist { background: var(--mist); }
    .section-paper { background: var(--paper); }
    .sec-head { max-width: 760px; margin-bottom: 48px; }
    .sec-head h2 { font-size: clamp(28px, 3.2vw, 42px); margin: 10px 0 16px; }
    .sec-head p { color: var(--mute); font-size: 17px; }

    /* header */
    .topbar {
      background: var(--graphite); color: #efe8dc; font-size: 13px; height: var(--header-top);
    }
    .topbar .container, .nav-inner {
      display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 16px;
    }
    .cert { display: flex; align-items: center; gap: 10px; color: #d8d0c4; }
    .cert b {
      border: 1px solid rgba(176,138,91,.5); color: var(--copper);
      font-size: 11px; letter-spacing: 0.08em; padding: 2px 8px; font-weight: 600;
    }
    .top-links { display: flex; gap: 18px; align-items: center; }
    .top-links a { color: #efe8dc; }
    .top-links a:hover { color: var(--copper); }
    .site-header { position: sticky; top: 0; z-index: 50; }
    .mainnav {
      background: rgba(247,244,238,.94); border-bottom: 1px solid var(--line);
      backdrop-filter: saturate(1.1);
      transition: 0.25s ease;
    }
    .nav-inner { min-height: 78px; }
    .logo { display: flex; align-items: baseline; gap: 10px; }
    .logo strong {
      font-family: "Noto Serif SC", serif; font-size: 26px; color: var(--pine);
    }
    .logo span { font-size: 12px; letter-spacing: 0.18em; color: var(--copper-deep); }
    .menu { display: flex; gap: 4px; }
    .menu a {
      position: relative; padding: 10px 12px; font-size: 15px; color: var(--mute);
    }
    .menu a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 4px;
      height: 1px; background: var(--copper); transform: scaleX(0); transform-origin: left; transition: 0.2s;
    }
    .menu a:hover, .menu a.is-active { color: var(--pine); }
    .menu a:hover::after, .menu a.is-active::after { transform: scaleX(1); }
    .nav-cta { margin-left: 8px; }
    .burger {
      display: none; width: 44px; height: 44px; position: relative;
    }
    .burger span, .burger span::before, .burger span::after {
      position: absolute; width: 20px; height: 1.5px; background: var(--pine); left: 12px;
    }
    .burger span { top: 21px; }
    .burger span::before, .burger span::after { content: ""; left: 0; }
    .burger span::before { top: -6px; }
    .burger span::after { top: 6px; }
    body.nav-open { overflow: hidden; }
    .header-compact .nav-inner { min-height: 62px; }
    .header-compact .logo strong { font-size: 22px; }

    /* drawer */
    .drawer {
      position: fixed; inset: 0; background: var(--paper); z-index: 60;
      display: none; flex-direction: column; padding: 28px 22px 32px;
    }
    body.nav-open .drawer { display: flex; }
    .drawer-top { display: flex; justify-content: space-between; align-items: center; }
    .drawer nav { margin-top: 48px; display: flex; flex-direction: column; gap: 8px; }
    .drawer nav a {
      font-family: "Noto Serif SC", serif; font-size: 32px; padding: 10px 0; min-height: 48px;
    }
    .drawer-phone { margin-top: auto; padding-top: 24px; border-top: 1px solid var(--line); }

    /* hero */
    #hero { position: relative; overflow: hidden; background: var(--graphite); }
    .slides { position: relative; min-height: 86vh; }
    .slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden;
      transition: opacity 1.1s ease, visibility 1.1s;
    }
    .slide.is-on { opacity: 1; visibility: visible; position: relative; }
    .slide img, .slide .bg {
      position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
      transform: scale(1.04); animation: ken 8s linear infinite;
    }
    @keyframes ken { from { transform: scale(1.04); } to { transform: scale(1.1); } }
    .slide::after {
      content: ""; position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(14,18,16,.72) 0%, rgba(14,18,16,.38) 48%, rgba(14,18,16,.18) 100%),
        radial-gradient(120% 80% at 80% 20%, transparent 20%, rgba(10,12,11,.35) 100%);
    }
    .hero-copy {
      position: relative; z-index: 2; color: #f7f2ea;
      max-width: 720px; padding: 150px 0 120px;
    }
    .hero-copy .brand-lock { font-size: 14px; letter-spacing: 0.22em; color: var(--copper); margin-bottom: 18px; }
    .hero-copy h1 { color: #fff; font-size: clamp(36px, 5vw, 62px); margin-bottom: 20px; }
    .hero-copy p { color: #e6dfd3; max-width: 620px; margin-bottom: 32px; font-size: 17px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-ui {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 28px;
    }
    .hero-ui .container { display: flex; justify-content: space-between; align-items: center; }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 28px; height: 44px; display: grid; place-items: center;
    }
    .dots button i {
      display: block; width: 18px; height: 2px; background: rgba(255,255,255,.35);
    }
    .dots button.is-on i { background: var(--copper); }
    .arrows { display: flex; gap: 8px; }
    .arrows button {
      width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.28); color: #fff;
    }
    .arrows button:hover { border-color: var(--copper); color: var(--copper); }
    #hero:hover .slide img, #hero:hover .slide .bg { animation-play-state: paused; }

    /* sell */
    .sell { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .sell-item { padding: 42px 32px; border-right: 1px solid var(--line); }
    .sell-item:last-child { border-right: 0; }
    .sell-no {
      font-variant-numeric: tabular-nums; font-size: 42px; color: var(--copper);
      font-family: "Noto Serif SC", serif; line-height: 1;
    }
    .sell-item h3 { font-size: 22px; margin: 16px 0 10px; }
    .sell-item p { color: var(--mute); font-size: 15px; }

    /* intro */
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
    .spec-box {
      margin-top: 26px; padding: 22px 24px; border: 1px solid var(--line-strong);
      background: var(--white);
    }
    .spec-box strong { display: block; color: var(--pine); margin-bottom: 6px; }
    .intro-pic { position: relative; }
    .intro-pic img { width: 100%; height: 560px; object-fit: cover; border-radius: 6px; }
    .intro-pic .stamp {
      position: absolute; left: -18px; bottom: 24px; background: var(--pine); color: #f3eadc;
      padding: 16px 18px; font-size: 13px; max-width: 220px;
    }

    /* scenes */
    .scene-track {
      display: grid; grid-auto-flow: column; grid-auto-columns: minmax(320px, 1fr);
      gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px;
    }
    .scene-card {
      scroll-snap-align: start; position: relative; min-height: 420px; overflow: hidden; border-radius: 6px;
    }
    .scene-card img { width: 100%; height: 420px; object-fit: cover; }
    .scene-card figcaption {
      position: absolute; left: 0; right: 0; bottom: 0; padding: 24px;
      background: linear-gradient(transparent, rgba(16,20,18,.82)); color: #f4eee4;
    }
    .scene-card h3 { color: #fff; font-size: 24px; margin-bottom: 6px; }
    .scene-card p { color: #ddd4c6; font-size: 14px; }

    /* bento */
    .bento {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
    }
    .bento article {
      background: var(--white); border: 1px solid var(--line); padding: 26px 24px;
      min-height: 180px; transition: 0.22s ease;
    }
    .bento article:hover { transform: translateY(-3px); border-color: var(--copper); }
    .bento .wide { grid-column: span 2; min-height: 230px; background: var(--pine); color: #f4eee4; }
    .bento .wide h3, .bento .wide p { color: #f4eee4; }
    .icon-line { width: 28px; height: 28px; margin-bottom: 16px; color: var(--copper); }
    .bento h3 { font-size: 20px; margin-bottom: 8px; }
    .bento p { color: var(--mute); font-size: 15px; }

    /* hot services */
    .hot { display: grid; grid-template-columns: 1.3fr .85fr .85fr; gap: 18px; }
    .panel { background: var(--white); border: 1px solid var(--line); overflow: hidden; display: flex; flex-direction: column; }
    .panel img { width: 100%; height: 220px; object-fit: cover; }
    .panel-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
    .panel h3 { font-size: 24px; }
    .panel ul { display: grid; gap: 8px; color: var(--mute); font-size: 15px; }
    .panel ul li::before { content: "— "; color: var(--copper); }
    .hot .panel:first-child img { height: 280px; }

    /* dark case */
    .dark {
      position: relative; color: #efe8dc; padding: 120px 0;
      background: #141816 center/cover no-repeat;
    }
    .dark::before {
      content: ""; position: absolute; inset: 0; background: rgba(16,20,18,.82);
    }
    .dark .container { position: relative; z-index: 1; }
    .quote {
      font-family: "Noto Serif SC", serif; font-size: clamp(28px, 3.4vw, 46px);
      max-width: 920px; line-height: 1.4; color: #f7f1e6; margin-bottom: 48px;
    }
    .slices { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .slice {
      border: 1px solid rgba(176,138,91,.4); padding: 26px 24px; background: rgba(20,24,22,.35);
    }
    .slice small { color: var(--copper); letter-spacing: 0.12em; }
    .slice h3 { color: #fff; font-size: 22px; margin: 10px 0; }
    .slice p { color: #d8d0c4; }

    /* compare */
    .compare { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); }
    .col { padding: 36px 32px; }
    .col-left { background: #ebe7df; }
    .col-right { background: var(--pine); color: #f4eee4; }
    .col h3 { font-size: 24px; margin-bottom: 18px; }
    .col-right h3 { color: #fff; }
    .col li { padding: 12px 0; border-bottom: 1px solid rgba(26,28,27,.1); font-size: 16px; }
    .col-right li { border-bottom-color: rgba(255,255,255,.12); color: #e8e0d4; }

    /* stories */
    .stories { display: grid; grid-template-columns: 1.15fr .85fr; gap: 20px; }
    .story {
      background: var(--white); border: 1px solid var(--line); overflow: hidden;
      display: grid; grid-template-columns: 180px 1fr;
    }
    .story img { width: 100%; height: 100%; object-fit: cover; min-height: 220px; }
    .story-body { padding: 24px; }
    .story h3 { font-size: 22px; margin-bottom: 8px; }
    .num { color: var(--copper); font-family: "Noto Serif SC", serif; font-size: 28px; margin-top: 10px; }
    .story.tall { grid-column: 2; grid-row: span 2; display: block; }
    .story.tall img { height: 240px; }

    /* stats */
    .stats {
      display: grid; grid-template-columns: repeat(4, 1fr);
      background: var(--mist); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    }
    .stat { padding: 48px 20px; text-align: center; border-right: 1px solid var(--line); }
    .stat:last-child { border-right: 0; }
    .stat b {
      display: block; font-size: 46px; font-variant-numeric: tabular-nums;
      font-family: "Noto Serif SC", serif; color: var(--pine); line-height: 1;
    }
    .stat span { color: var(--mute); font-size: 14px; }

    /* reviews */
    .review-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 16px; }
    .review {
      background: var(--white); border: 1px solid var(--line); padding: 26px;
    }
    .stars { color: var(--copper); letter-spacing: 2px; font-size: 13px; margin-bottom: 10px; }
    .review p { font-size: 16px; margin-bottom: 16px; }
    .who { color: var(--mute); font-size: 13px; }
    .org-bar {
      display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 28px; color: var(--mute); font-size: 13px;
    }
    .org-bar a { border: 1px solid var(--line); padding: 8px 12px; min-height: 44px; display: inline-flex; align-items: center; }

    /* timeline */
    .axis { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; position: relative; }
    .axis::before {
      content: ""; position: absolute; left: 0; right: 0; top: 18px; height: 1px; background: var(--line-strong);
    }
    .node { position: relative; padding-top: 42px; }
    .node i {
      position: absolute; top: 12px; left: 0; width: 13px; height: 13px; border-radius: 50%;
      background: var(--paper); border: 2px solid var(--copper);
    }
    .node strong { display: block; margin-bottom: 6px; }
    .node p { color: var(--mute); font-size: 14px; }

    /* news */
    .news-list { display: grid; gap: 16px; }
    .news {
      display: grid; grid-template-columns: 220px 1fr auto; gap: 22px; align-items: center;
      background: var(--white); border: 1px solid var(--line); padding: 12px 18px 12px 12px;
      transition: 0.2s ease;
    }
    .news:hover { transform: translateY(-2px); border-color: var(--copper); }
    .news img { width: 220px; height: 128px; object-fit: cover; }
    .news time { color: var(--copper-deep); font-size: 13px; }
    .news h3 { font-size: 22px; margin: 6px 0 8px; }
    .news p { color: var(--mute); font-size: 15px; }
    .more { color: var(--pine); font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; }

    /* faq */
    .faq { display: grid; gap: 8px; }
    .faq-item { border: 1px solid var(--line); background: var(--white); }
    .faq-item button {
      width: 100%; text-align: left; padding: 18px 22px; min-height: 58px;
      display: flex; justify-content: space-between; gap: 16px; font-size: 18px;
      font-family: "Noto Serif SC", serif;
    }
    .faq-item button em {
      font-style: normal; transition: 0.25s; color: var(--copper);
    }
    .faq-item.is-open button em { transform: rotate(45deg); }
    .faq-a {
      height: 0; overflow: hidden; transition: height 0.28s ease;
      background: #e8eee8;
    }
    .faq-a p { padding: 0 22px 18px; color: var(--mute); }

    /* promise */
    .promise { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .badge {
      display: flex; gap: 12px; align-items: flex-start;
      border: 1px solid var(--line); padding: 18px; background: var(--white);
    }
    .mark {
      flex: 0 0 42px; height: 42px; display: grid; place-items: center;
      border: 1px solid var(--copper); color: var(--copper); font-size: 12px; letter-spacing: 0.08em;
    }
    .badge p { color: var(--mute); font-size: 14px; }

    /* cta */
    #assess { background: #e7eee6; padding: 110px 0; }
    .cta-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
    .form {
      background: var(--white); border: 1px solid var(--line); padding: 28px;
    }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    label { display: block; font-size: 13px; margin: 12px 0 6px; color: var(--mute); }
    input, select, textarea {
      width: 100%; min-height: 46px; border: 1px solid var(--line); background: #fbfaf6;
      padding: 10px 12px; font-size: 15px; color: var(--ink);
    }
    textarea { min-height: 92px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--copper); outline: none; }
    .checks { display: flex; flex-wrap: wrap; gap: 10px 16px; margin: 12px 0 20px; }
    .checks label { margin: 0; color: var(--ink); display: flex; gap: 6px; align-items: center; min-height: 44px; }
    .form-note { font-size: 13px; color: var(--mute); margin-top: 10px; }
    .ok, .err { display: none; margin-top: 14px; padding: 12px; font-size: 14px; }
    .ok { background: #e5efe6; color: var(--pine); }
    .err { background: #f4e6dc; color: #6b3b2a; }
    .side-card { border-left: 1px solid var(--line-strong); padding-left: 28px; }
    .side-card a { color: var(--pine); font-weight: 600; }

    /* footer */
    footer { background: var(--graphite); color: #d8d0c4; padding: 64px 0 24px; }
    .foot-top { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; margin-bottom: 42px; }
    .brand-lock strong { font-family: "Noto Serif SC", serif; font-size: 26px; color: #f4eee4; display: block; }
    .brand-lock em { font-style: normal; color: var(--copper); font-size: 12px; letter-spacing: 0.18em; }
    .foot-top p { margin-top: 14px; max-width: 360px; }
    .foot-top h4 { color: #f4eee4; margin-bottom: 12px; font-size: 16px; }
    .foot-top a { display: block; padding: 4px 0; color: #d8d0c4; }
    .foot-top a:hover { color: var(--copper); }
    .copy {
      border-top: 1px solid rgba(255,255,255,.08); padding-top: 16px;
      display: flex; justify-content: space-between; gap: 12px; font-size: 13px; flex-wrap: wrap;
    }

    /* dock */
    .dock {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
      background: var(--pine); color: #f4eee4;
      transform: translateY(110%); transition: 0.28s ease;
    }
    .dock.show { transform: none; }
    .dock .container { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 12px; }
    .dock-close { width: 44px; height: 44px; color: #f4eee4; }

    .reveal { opacity: 0; transform: translateY(16px); animation: up .7s ease forwards; }
    @keyframes up { to { opacity: 1; transform: none; } }

    @media (max-width: 1440px) {
      .hero-copy { padding-top: 130px; }
    }
    @media (max-width: 1024px) {
      .menu, .nav-cta { display: none; }
      .burger { display: inline-block; }
      .intro-grid, .hot, .compare, .stories, .cta-grid, .foot-top, .review-grid { grid-template-columns: 1fr; }
      .bento { grid-template-columns: 1fr 1fr; }
      .bento .wide { grid-column: span 2; }
      .axis { grid-template-columns: 1fr 1fr 1fr; }
      .promise, .stats { grid-template-columns: 1fr 1fr; }
      .story { grid-template-columns: 140px 1fr; }
      .story.tall { grid-column: auto; grid-row: auto; }
      .news { grid-template-columns: 160px 1fr; }
      .news .more { display: none; }
      .hot .panel:first-child img, .panel img { height: 200px; }
      .section { padding: 80px 0; }
    }
    @media (max-width: 768px) {
      .top-links span, .cert span { display: none; }
      .sell { grid-template-columns: 1fr; }
      .sell-item { border-right: 0; border-bottom: 1px solid var(--line); padding: 28px 8px; }
      .slides { min-height: 78vh; }
      .hero-copy { padding: 96px 0 108px; }
      .hero-copy h1 { font-size: 32px; }
      .hero-copy p { display: none; }
      .hero-actions .btn { min-height: 48px; width: 100%; }
      .form-row, .bento, .promise, .stats, .axis { grid-template-columns: 1fr; }
      .bento .wide { grid-column: auto; }
      .intro-pic img { height: 320px; }
      .scene-card, .scene-card img { height: 360px; }
      .news { grid-template-columns: 1fr; }
      .news img { width: 100%; height: 180px; }
      .dock .hide-m { display: none; }
      .dock .container { padding: 8px 0 10px; }
      .dock-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; width: 100%; }
      .dock-actions .btn { width: 100%; }
      .side-card { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 22px; }
      .container { width: min(var(--max), calc(100% - 32px)); }
    }
    @media (max-width: 375px) {
      body { font-size: 16px; }
      .logo strong { font-size: 22px; }
      .hero-copy h1 { font-size: 28px; }
    }