/* roulang page: index */
:root {
  --graphite: #2A3036;
  --graphite-2: #343b42;
  --orange: #E85D04;
  --orange-d: #c44d03;
  --teal: #1AA89A;
  --teal-d: #14867b;
  --bg: #F3F0E8;
  --bg-2: #e8e3d6;
  --card: #ffffff;
  --dark: #14181C;
  --dark-2: #1c2228;
  --text: #1C1917;
  --muted: #57534E;
  --line: #ddd6c8;
  --line-2: #ece7db;
  --white: #f8f6f1;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 8px 24px rgba(28, 25, 23, 0.06);
  --shadow-sm: 0 2px 8px rgba(28, 25, 23, 0.04);
  --space: 88px;
  --nav-h: 64px;
  --top-h: 38px;
  --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: 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; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip {
  position: absolute; left: -999px; top: 0;
}
.skip:focus { left: 12px; top: 12px; background: #fff; padding: 8px 12px; z-index: 80; }

/* Header / dual nav */
.site-header { position: relative; z-index: 50; }
.nav-top {
  background: var(--dark);
  color: #d6d3d1;
  font-size: 13px;
  min-height: var(--top-h);
  display: flex;
  align-items: center;
}
.nav-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 6px 0;
  flex-wrap: wrap;
}
.nav-top-contacts { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
.nav-top a { color: #e7e5e4; }
.nav-top a:hover { color: var(--teal); }
.nav-top-links { display: flex; gap: 16px; }
.nav-top-links a {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
}
.nav-top-links a:hover { border-bottom-color: var(--teal); color: var(--teal); }
.ico { width: 14px; height: 14px; display: inline-block; vertical-align: -2px; margin-right: 6px; }
.nav-main {
  background: var(--graphite);
  color: var(--white);
  min-height: var(--nav-h);
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: box-shadow .2s ease;
}
.nav-main.is-stuck { box-shadow: 0 8px 24px rgba(0,0,0,.28); }
.nav-main-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: var(--nav-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: #fff;
}
.logo-mark {
  width: 36px; height: 36px;
  border: 1px solid rgba(26,168,154,.55);
  border-radius: 6px;
  display: grid;
  place-items: center;
  background: #1b2126;
}
.logo-text { font-weight: 700; font-size: 16px; letter-spacing: .04em; line-height: 1.2; }
.logo-text small { display: block; font-weight: 400; font-size: 11px; color: #a8a29e; letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: center; }
.nav-links a {
  color: #e7e5e4;
  font-size: 14px;
  padding: 8px 10px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px; bottom: 6px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}
.nav-links a:hover { color: #fff; }
.nav-links a.is-active { color: #fff; }
.nav-links a.is-active::after,
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta { flex-shrink: 0; }
.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  display: block; width: 18px; height: 2px; background: #fff;
}
.mobile-panel {
  display: none;
  background: var(--dark);
  color: #e7e5e4;
  padding: 8px 20px 28px;
}
.mobile-panel.is-open { display: block; }
.mobile-panel .nav-top-contacts { margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 13px; }
.mobile-panel a {
  display: flex; align-items: center;
  min-height: 48px;
  border-bottom: 1px solid rgba(255,255,255,.06);
  color: #f5f5f4;
  font-size: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease;
  position: relative;
  text-align: center;
}
.btn::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 6px;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transition: transform .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:hover::after { transform: scaleX(1); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-d); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,.45);
}
.btn-ghost:hover { border-color: var(--teal); color: #fff; }
.btn-line {
  background: #fff;
  color: var(--graphite);
  border: 1px solid var(--graphite);
}
.btn-line:hover { border-color: var(--orange); color: var(--orange); }
.btn-block { width: 100%; }

/* Hero */
.hero { position: relative; background: var(--dark); overflow: hidden; }
.hero-track { position: relative; min-height: 620px; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity .55s ease;
  background-size: cover;
  background-position: center;
}
.hero-slide.is-on { opacity: 1; pointer-events: auto; position: relative; }
.hero-slide::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(20,24,28,.88) 0%, rgba(20,24,28,.62) 48%, rgba(20,24,28,.28) 100%);
}
.hero-slide::after {
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(to bottom, transparent 0 7px, rgba(26,168,154,.045) 7px 8px);
  pointer-events: none;
}
.hero-copy {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0 110px;
  max-width: 760px;
  margin-left: max(20px, calc((100% - 1180px) / 2));
}
.brand-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal);
  font-size: 13px;
  letter-spacing: .18em;
  margin-bottom: 18px;
  text-transform: none;
}
.brand-chip i {
  width: 28px; height: 1px; background: var(--teal); display: inline-block;
}
.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.hero-lead {
  color: #d6d3d1;
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 28px;
  max-width: 640px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-nav {
  position: absolute;
  left: 0; right: 0; bottom: 24px;
  z-index: 3;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.hero-dots { display: flex; gap: 8px; }
.hero-dots button {
  width: 22px; height: 8px;
  border-radius: 99px;
  background: rgba(255,255,255,.28);
  min-width: 22px;
}
.hero-dots button.is-on { background: var(--orange); width: 32px; }
.hero-arrows { display: flex; gap: 8px; }
.hero-arrows button, .hero-pause {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(243,240,232,.92);
  color: var(--graphite);
  display: grid;
  place-items: center;
  font-size: 18px;
}
.hero-arrows button:hover, .hero-pause:hover { background: #fff; }
.scan-line {
  position: absolute; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  z-index: 4;
  animation: scan 9s linear infinite;
  opacity: .45;
  pointer-events: none;
}
@keyframes scan { from { top: 12%; } to { top: 88%; } }

/* Common sections */
.section { padding: var(--space) 0; position: relative; }
.section-h {
  margin-bottom: 36px;
}
.section-h h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: .01em;
}
.section-h p {
  color: var(--muted);
  max-width: 760px;
  line-height: 1.8;
  margin-bottom: .8em;
}
.kicker {
  color: var(--teal-d);
  font-size: 12px;
  letter-spacing: .16em;
  margin-bottom: 8px;
  font-weight: 500;
}
.dots-bg {
  background-image: radial-gradient(rgba(42,48,54,.07) 1px, transparent 1px);
  background-size: 18px 18px;
}
.band { background: var(--bg-2); }
.slash {
  clip-path: polygon(0 18px, 100% 0, 100% 100%, 0 100%);
  padding-top: calc(var(--space) + 18px);
}

/* Metrics dashboard */
.metrics { background: #ece8de; }
.board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.metric {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  box-shadow: var(--shadow-sm);
  min-height: 148px;
}
.metric-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--muted);
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(26,168,154,.18);
}
.dot.warn { background: var(--orange); box-shadow: 0 0 0 3px rgba(232,93,4,.16); }
.metric .num {
  font-variant-numeric: tabular-nums;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  letter-spacing: -.02em;
}
.metric .num em {
  font-style: normal;
  font-size: 14px;
  color: var(--muted);
  margin-left: 4px;
  font-weight: 500;
}
.metric .delta { font-size: 12px; color: var(--teal-d); margin-top: 6px; }
.metric svg { width: 100%; height: 28px; margin-top: 8px; display: block; }
.stat-bar {
  margin-top: 18px;
  background: var(--graphite);
  color: #fff;
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.stat-item {
  padding: 18px 16px;
  border-right: 1px solid rgba(255,255,255,.08);
  text-align: left;
}
.stat-item:last-child { border-right: 0; }
.stat-item b {
  display: block;
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}
.stat-item b span { font-size: 13px; font-weight: 500; color: var(--orange); margin-left: 4px; }
.stat-item small { display: block; font-size: 12px; color: #a8a29e; margin-top: 4px; letter-spacing: .04em; }

/* Split product */
.split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.split-pic {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #ddd;
}
.split-pic img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
.param-list { margin-top: 18px; display: grid; gap: 10px; }
.param-list li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-2);
  font-size: 14px;
  line-height: 1.65;
}
.param-list b { color: var(--graphite); font-weight: 600; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 4px;
  font-size: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--graphite);
}
.badge-teal { border-color: rgba(26,168,154,.4); color: var(--teal-d); background: rgba(26,168,154,.08); }

/* 6 cards */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.mx-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
  min-height: 196px;
}
.mx-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.mx-ico {
  width: 40px; height: 40px;
  border: 1px solid var(--teal);
  color: var(--teal-d);
  border-radius: 6px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.mx-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.mx-card p { color: var(--muted); font-size: 14px; line-height: 1.75; }
.mx-card .probe {
  margin-top: 12px;
  font-size: 12px;
  color: var(--teal-d);
  letter-spacing: .02em;
}

/* Models 1 large 2 small */
.models-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}
.model {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.model img { width: 100%; height: 180px; object-fit: cover; }
.model:first-child img { height: 260px; }
.model-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.model h3 { font-size: 18px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 2px 8px;
  color: var(--muted);
}
.kv { font-size: 13px; color: var(--muted); }
.kv li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--line-2);
  font-variant-numeric: tabular-nums;
}
.kv strong { color: var(--text); font-weight: 600; }
.model .btn { margin-top: auto; }

/* Scenes */
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.scene {
  display: grid;
  grid-template-columns: 180px 1fr;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 170px;
  transition: border-color .18s ease;
}
.scene:hover { border-color: var(--orange); }
.scene img { width: 100%; height: 100%; object-fit: cover; min-height: 170px; }
.scene-body { padding: 18px 18px 16px; }
.scene h3 { font-size: 18px; margin-bottom: 8px; }
.scene p { color: var(--muted); font-size: 14px; }
.scene a { display: inline-flex; margin-top: 10px; color: var(--orange); font-size: 14px; min-height: 32px; align-items: center; }

/* Compare */
.compare-wrap { overflow-x: auto; }
.compare {
  min-width: 640px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.compare th, .compare td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
  line-height: 1.65;
}
.compare thead th {
  background: var(--graphite);
  color: #fff;
  font-weight: 600;
}
.compare thead th:last-child { background: #3a2418; }
.compare tbody td:last-child { background: rgba(232,93,4,.08); font-weight: 500; }
.compare tbody tr:hover td:first-child { color: var(--orange); }
.compare-cta { margin-top: 20px; }

/* Dark cases */
.cases {
  background: var(--dark) url("/assets/images/7545380dfea8a03e.webp") center/cover no-repeat;
  color: #fff;
  position: relative;
}
.cases::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,24,28,.88), rgba(20,24,28,.92));
}
.cases .container { position: relative; z-index: 1; }
.cases .section-h p { color: #d6d3d1; }
.case-list { display: grid; gap: 12px; }
.case-row {
  display: grid;
  grid-template-columns: 220px 1fr 180px;
  gap: 16px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid rgba(255,255,255,.1);
  background: rgba(20,24,28,.45);
  border-radius: 8px;
}
.case-row .when { color: var(--teal); font-variant-numeric: tabular-nums; font-size: 14px; }
.case-row h3 { font-size: 17px; margin-bottom: 6px; }
.case-row p { color: #d6d3d1; font-size: 14px; }
.case-row .result { color: var(--orange); font-weight: 600; font-size: 15px; text-align: right; }
.idea {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--teal);
  color: #e7e5e4;
  font-size: 15px;
}

/* Timeline */
.timeline { position: relative; max-width: 820px; margin-left: 12px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--teal);
}
.tl-item { position: relative; padding: 0 0 28px 36px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: 2px; top: 8px;
  width: 12px; height: 12px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(26,168,154,.16);
}
.tl-year {
  font-variant-numeric: tabular-nums;
  color: var(--orange);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 4px;
}
.tl-item h3 { font-size: 17px; margin-bottom: 4px; }
.tl-item p { color: var(--muted); font-size: 14px; }

/* Stories */
.story {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}
.story img { width: 100%; height: 100%; object-fit: cover; min-height: 220px; }
.story-body { padding: 24px 24px 24px 0; }
.story h3 { font-size: 18px; margin-bottom: 10px; }
.story p { color: var(--muted); font-size: 15px; margin-bottom: .8em; }
.flow { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.flow span {
  background: var(--bg);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--graphite);
}

/* Reviews */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.review {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  min-height: 180px;
}
.review q {
  display: block;
  quotes: "「" "」";
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}
.review q::before { content: open-quote; color: var(--orange); }
.review q::after { content: close-quote; color: var(--orange); }
.review-meta {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}
.pill {
  font-size: 12px;
  border: 1px solid rgba(26,168,154,.4);
  color: var(--teal-d);
  border-radius: 99px;
  padding: 2px 8px;
}

/* News */
.news-list { display: grid; gap: 12px; }
.news-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 132px;
}
.news-item img { width: 100%; height: 100%; object-fit: cover; min-height: 132px; }
.news-item.compact { grid-template-columns: 1fr; padding: 16px 18px; }
.news-body { padding: 16px 16px 16px 0; }
.news-item.compact .news-body { padding: 0; }
.news-item h3 { font-size: 17px; margin-bottom: 6px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-item p { color: var(--muted); font-size: 14px; }
.news-item time { font-size: 12px; color: #a8a29e; font-variant-numeric: tabular-nums; }
.more-link {
  display: inline-flex;
  margin-top: 16px;
  min-height: 44px;
  align-items: center;
  color: var(--orange);
  font-weight: 500;
}

/* Guarantee */
.g-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.g-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}
.g-card h3 { font-size: 17px; margin: 8px 0; }
.g-card p { color: var(--muted); font-size: 14px; }
.g-no { color: var(--orange); font-variant-numeric: tabular-nums; font-weight: 700; font-size: 13px; letter-spacing: .08em; }

/* Quick answers */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  color: var(--graphite);
  transition: border-color .18s ease, color .18s ease;
}
.chip:hover, .chip:focus-visible { border-color: var(--orange); color: var(--orange); }

/* FAQ */
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
}
.faq-item button {
  width: 100%;
  text-align: left;
  min-height: 56px;
  padding: 14px 48px 14px 18px;
  font-size: 16px;
  font-weight: 600;
  position: relative;
  color: var(--text);
}
.faq-item button::after {
  content: "";
  position: absolute;
  right: 18px; top: 50%;
  width: 10px; height: 10px;
  border-right: 2px solid var(--graphite);
  border-bottom: 2px solid var(--graphite);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .2s ease;
}
.faq-item.is-open button::after { transform: translateY(-30%) rotate(225deg); }
.faq-panel {
  display: none;
  padding: 0 18px 16px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.is-open .faq-panel { display: block; }

/* Lead form */
.lead {
  background: var(--dark-2);
  color: #fff;
  padding: var(--space) 0;
}
.lead-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 40px;
  align-items: start;
}
.lead h2 { color: #fff; }
.lead .section-h p { color: #d6d3d1; }
.lead-points { margin: 18px 0 22px; }
.lead-points li {
  padding: 8px 0 8px 18px;
  position: relative;
  color: #e7e5e4;
  font-size: 15px;
}
.lead-points li::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--teal);
  position: absolute;
  left: 0; top: 16px;
}
.lead-contact a { color: #fff; }
.lead-contact p { color: #a8a29e; font-size: 14px; margin-top: 6px; }
.form-box {
  background: #1b2127;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 22px;
}
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
  color: #d6d3d1;
}
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid rgba(255,255,255,.14);
  background: #14181c;
  color: #fff;
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 15px;
}
.field textarea { min-height: 96px; resize: vertical; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--teal);
  border-color: transparent;
}
.field.is-error input, .field.is-error select, .field.is-error textarea {
  border-color: var(--orange);
}
.err { display: none; color: var(--orange); font-size: 12px; margin-top: 4px; }
.field.is-error .err { display: block; }
.form-note { margin-top: 12px; font-size: 13px; color: #a8a29e; }
.form-ok {
  display: none;
  background: rgba(26,168,154,.12);
  border: 1px solid var(--teal);
  color: #d1faf4;
  padding: 12px 14px;
  border-radius: 6px;
  margin-bottom: 12px;
}

/* Footer */
.site-footer {
  background: #101418;
  color: #d6d3d1;
  padding: 48px 0 20px;
  font-size: 14px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  gap: 28px;
  margin-bottom: 28px;
}
.site-footer h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.site-footer a { color: #d6d3d1; display: inline-flex; min-height: 32px; align-items: center; }
.site-footer a:hover { color: var(--teal); }
.foot-brand .logo-text { color: #fff; margin-bottom: 10px; }
.foot-brand p { line-height: 1.8; color: #a8a29e; }
.foot-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: #78716c;
  font-size: 13px;
}

@media (max-width: 1024px) {
  :root { --space: 68px; }
  .board { grid-template-columns: repeat(2, 1fr); }
  .matrix-grid { grid-template-columns: 1fr 1fr; }
  .models-grid { grid-template-columns: 1fr 1fr; }
  .model:first-child { grid-column: 1 / -1; }
  .model:first-child img { height: 240px; }
  .split, .lead-grid { grid-template-columns: 1fr; gap: 24px; }
  .g-grid { grid-template-columns: 1fr 1fr; }
  .review-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-links a { padding: 8px 7px; font-size: 13px; }
  .case-row { grid-template-columns: 1fr; }
  .case-row .result { text-align: left; }
  .story { grid-template-columns: 1fr; }
  .story-body { padding: 18px; }
}
@media (max-width: 768px) {
  :root { --space: 56px; }
  .container, .nav-top-inner, .nav-main-inner, .hero-copy, .hero-nav { width: min(100% - 32px, 1180px); }
  .nav-links, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .nav-top .hours { display: none; }
  .hero-track { min-height: 0; }
  .hero-copy { padding: 56px 0 96px; margin-left: auto; margin-right: auto; }
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .board, .stat-bar, .matrix-grid, .models-grid, .review-grid, .g-grid, .foot-grid {
    grid-template-columns: 1fr;
  }
  .stat-item { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .scene-grid {
    display: flex;
    overflow-x: auto;
    gap: 12px;
    scroll-snap-type: x mandatory;
    padding-bottom: 6px;
  }
  .scene {
    min-width: 82%;
    scroll-snap-align: start;
    grid-template-columns: 1fr;
  }
  .scene img { min-height: 160px; max-height: 180px; }
  .news-item { grid-template-columns: 1fr; }
  .news-body { padding: 14px; }
  .split-pic img { min-height: 220px; }
  .param-list li { grid-template-columns: 1fr; gap: 2px; }
}
@media (max-width: 520px) {
  body { font-size: 15px; }
  .metric .num { font-size: 26px; }
  .logo-text { font-size: 14px; }
  .nav-top-contacts { gap: 6px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}