:root {
  --ink: #171a1f;
  --muted: #5d6670;
  --steel: #3f4a54;
  --line: #d9dee3;
  --paper: #f4f6f7;
  --white: #ffffff;
  --safety: #f3b700;
  --safety-dark: #b47a00;
  --teal: #0f8b8d;
  --brick: #b34c32;
  --green: #2f7d57;
  --shadow: 0 20px 50px rgba(23, 26, 31, 0.16);
  --radius: 8px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}

button {
  cursor: pointer;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(217, 222, 227, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 42px;
  color: var(--ink);
  background: var(--safety);
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 800;
  font-size: 12px;
}

.brand-name {
  font-weight: 800;
  font-size: 17px;
  white-space: nowrap;
}

.nav-toggle {
  display: grid;
  gap: 4px;
  width: 42px;
  height: 42px;
  place-content: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.nav {
  position: absolute;
  top: 62px;
  left: 0;
  right: 0;
  display: none;
  grid-template-columns: repeat(4, 1fr);
  padding: 10px 12px 14px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.nav.is-open {
  display: grid;
}

.nav a {
  padding: 10px 6px;
  text-align: center;
  font-weight: 700;
  color: var(--steel);
}

.hero {
  position: relative;
  min-height: 78svh;
  overflow: hidden;
  color: var(--white);
  background: #20262d;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(23, 26, 31, 0.94), rgba(23, 26, 31, 0.68) 52%, rgba(23, 26, 31, 0.38)),
    linear-gradient(135deg, rgba(15, 139, 141, 0.3), transparent 42%),
    linear-gradient(25deg, rgba(243, 183, 0, 0.28), transparent 34%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 78svh;
  padding: 58px 20px 76px;
  max-width: 640px;
}

.eyebrow,
.section-kicker,
.mini-label {
  margin: 0 0 10px;
  color: var(--safety);
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.03;
}

.hero-lead {
  margin: 18px 0 0;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 800;
  text-align: center;
}

.button.primary {
  color: var(--ink);
  background: var(--safety);
  border-color: var(--safety);
}

.button.ghost {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.34);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 0;
  margin: 32px 0 0;
  list-style: none;
}

.proof-strip li {
  padding: 12px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.proof-strip strong,
.proof-strip span {
  display: block;
}

.proof-strip strong {
  font-size: 17px;
}

.proof-strip span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.hero-scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  min-height: 520px;
}

.factory-wall {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 92px),
    linear-gradient(180deg, #343d46, #171a1f 84%);
}

.beam {
  position: absolute;
  left: 5%;
  right: 5%;
  height: 10px;
  background: rgba(255, 255, 255, 0.14);
  transform: skewY(-7deg);
}

.beam-a {
  top: 20%;
}

.beam-b {
  top: 38%;
}

.beam-c {
  top: 56%;
}

.door-system {
  position: absolute;
  right: 4%;
  bottom: 12%;
  width: min(56vw, 620px);
  height: min(52vw, 450px);
  border: 8px solid rgba(255, 255, 255, 0.15);
  background: #29323a;
  box-shadow: var(--shadow);
}

.door-track {
  position: absolute;
  top: -8px;
  bottom: -8px;
  width: 10px;
  background: #9ba6af;
}

.door-track.left {
  left: -18px;
}

.door-track.right {
  right: -18px;
}

.door-panel {
  position: absolute;
  inset: 24px 22px 18px;
  background:
    repeating-linear-gradient(180deg, #aeb8c0 0 12px, #8c99a4 12px 16px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.25), transparent);
}

.door-window {
  position: absolute;
  top: 28%;
  left: 15%;
  right: 15%;
  height: 18%;
  border: 4px solid rgba(255, 255, 255, 0.5);
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.62), rgba(15, 139, 141, 0.18)),
    repeating-linear-gradient(90deg, transparent 0 28%, rgba(255, 255, 255, 0.35) 28% 30%);
}

.safety-line {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 16px;
  height: 9px;
  background: repeating-linear-gradient(90deg, var(--safety) 0 26px, #171a1f 26px 52px);
}

.glass-entry {
  position: absolute;
  right: 48%;
  bottom: 12%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(30vw, 260px);
  height: min(36vw, 320px);
  border: 5px solid rgba(255, 255, 255, 0.28);
  background: rgba(15, 139, 141, 0.18);
}

.glass-entry span {
  border-right: 2px solid rgba(255, 255, 255, 0.26);
  background:
    linear-gradient(125deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.06) 46%, rgba(15, 139, 141, 0.22)),
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.16));
}

.glass-entry span:last-child {
  border-right: 0;
}

.floor-grid {
  position: absolute;
  left: -20%;
  right: -20%;
  bottom: -12%;
  height: 34%;
  background:
    linear-gradient(rgba(243, 183, 0, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 183, 0, 0.2) 1px, transparent 1px),
    linear-gradient(180deg, rgba(0, 0, 0, 0.1), #11151a);
  background-size: 64px 28px, 64px 28px, 100% 100%;
  transform: perspective(340px) rotateX(58deg);
  transform-origin: bottom;
}

.section {
  padding: 58px 0;
}

.section-inner {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.section-light {
  background: var(--paper);
}

.advantage-band {
  background:
    linear-gradient(90deg, rgba(243, 183, 0, 0.2), transparent 34%),
    linear-gradient(180deg, #ffffff, #f4f6f7);
}

.advantage-grid {
  display: grid;
  gap: 14px;
}

.advantage-item {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 36px rgba(23, 26, 31, 0.08);
}

.advantage-item span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--ink);
  background: var(--safety);
  border-radius: 6px;
  font-weight: 900;
}

.advantage-item h3 {
  margin: 14px 0 8px;
  font-size: 22px;
}

.advantage-item p {
  margin: 0;
  color: var(--muted);
}

.section-dark {
  color: var(--white);
  background:
    radial-gradient(circle at 84% 18%, rgba(243, 183, 0, 0.16), transparent 30%),
    linear-gradient(145deg, #171a1f, #303944);
}

.section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.22;
}

.section-head p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
}

.dark-copy p:last-child {
  color: rgba(255, 255, 255, 0.74);
}

.product-shell {
  display: grid;
  gap: 18px;
}

.product-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.tab {
  min-height: 46px;
  padding: 10px;
  color: var(--steel);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 800;
}

.tab.is-active {
  color: var(--ink);
  background: var(--safety);
  border-color: var(--safety-dark);
}

.product-panel {
  display: grid;
  gap: 22px;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.product-visual {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 38%),
    linear-gradient(140deg, #202933, #5d6872);
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 2px, transparent 2px 54px),
    linear-gradient(180deg, transparent 0 67%, rgba(0, 0, 0, 0.34) 67%),
    linear-gradient(135deg, rgba(15, 139, 141, 0.22), transparent 42%);
}

.product-visual::after {
  content: "";
  position: absolute;
  left: -16%;
  right: -16%;
  bottom: -12%;
  z-index: -1;
  height: 38%;
  background:
    linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.26));
  background-size: 52px 22px, 52px 22px, 100% 100%;
  transform: perspective(320px) rotateX(58deg);
  transform-origin: bottom;
}

.visual-frame,
.visual-door,
.visual-door.secondary,
.visual-hardware,
.visual-highlight,
.visual-ground,
.visual-backdrop {
  position: absolute;
}

.visual-backdrop {
  left: 9%;
  right: 9%;
  top: 12%;
  height: 18%;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0 18px, transparent 18px 36px);
  opacity: 0.8;
}

.visual-frame {
  left: 14%;
  right: 14%;
  top: 20%;
  bottom: 14%;
  border: 8px solid rgba(226, 233, 238, 0.94);
  border-bottom-width: 12px;
  box-shadow:
    0 16px 40px rgba(0, 0, 0, 0.26),
    inset 0 0 0 2px rgba(255, 255, 255, 0.22);
}

.visual-door {
  left: 18%;
  top: 26%;
  bottom: 19%;
  width: 32%;
  background:
    linear-gradient(118deg, rgba(255, 255, 255, 0.82), rgba(120, 183, 195, 0.28) 46%, rgba(255, 255, 255, 0.2)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.42), transparent 32%, rgba(255, 255, 255, 0.18));
  border: 3px solid rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 0 28px rgba(15, 139, 141, 0.22);
}

.visual-door.secondary {
  left: auto;
  right: 18%;
}

.visual-hardware {
  left: calc(50% - 52px);
  top: 15%;
  width: 104px;
  height: 24px;
  background:
    linear-gradient(180deg, #f8fbfd, #bcc6ce),
    linear-gradient(90deg, transparent, rgba(15, 139, 141, 0.35), transparent);
  border: 3px solid rgba(32, 41, 51, 0.72);
  border-radius: 5px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
}

.visual-highlight {
  left: 24%;
  top: 23%;
  width: 16%;
  height: 56%;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.5), transparent 56%);
  transform: skewX(-12deg);
}

.visual-ground {
  left: 16%;
  right: 16%;
  bottom: 12%;
  height: 9px;
  background: repeating-linear-gradient(90deg, var(--safety) 0 28px, #171a1f 28px 56px);
}

.visual-sensing .visual-frame {
  border-color: rgba(222, 231, 237, 0.96);
}

.visual-floor-spring .visual-frame {
  left: 18%;
  right: 18%;
  top: 18%;
  bottom: 13%;
  border-color: rgba(229, 235, 239, 0.88);
}

.visual-floor-spring .visual-door,
.visual-floor-spring .visual-door.secondary {
  bottom: 14%;
  background:
    linear-gradient(125deg, rgba(255, 255, 255, 0.75), rgba(190, 231, 238, 0.2) 50%, rgba(255, 255, 255, 0.28)),
    repeating-linear-gradient(90deg, transparent 0 46%, rgba(255, 255, 255, 0.72) 46% 48%);
}

.visual-floor-spring .visual-hardware {
  left: 44%;
  top: 46%;
  width: 12%;
  height: 48px;
  background: linear-gradient(90deg, #c9d0d6, #ffffff, #929da7);
  border: 0;
  border-radius: 8px;
}

.visual-floor-spring .visual-ground {
  left: 27%;
  right: 27%;
  height: 14px;
  background:
    linear-gradient(90deg, #9aa3aa, #f3f6f8 18%, #7d878f 32%, transparent 32% 68%, #7d878f 68%, #f3f6f8 82%, #9aa3aa);
}

.visual-rolling .visual-frame,
.visual-sectional .visual-frame,
.visual-rapid .visual-frame {
  left: 13%;
  right: 13%;
  top: 18%;
  bottom: 12%;
  border-color: rgba(218, 226, 232, 0.9);
}

.visual-rolling .visual-door {
  left: 17%;
  right: 17%;
  width: auto;
  top: 27%;
  bottom: 18%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.34), transparent 18%, rgba(0, 0, 0, 0.12) 78%),
    repeating-linear-gradient(180deg, #d4dade 0 10px, #98a3ad 10px 14px);
  border: 0;
  box-shadow: inset 0 -12px 28px rgba(0, 0, 0, 0.18);
}

.visual-rolling .visual-door.secondary,
.visual-sectional .visual-door.secondary,
.visual-rapid .visual-door.secondary {
  display: none;
}

.visual-rolling .visual-hardware {
  left: 13%;
  right: 13%;
  top: 15%;
  width: auto;
  height: 36px;
  background:
    radial-gradient(circle at 20% 50%, #e8edf1 0 12px, #9ba5ae 12px 24px, transparent 24px),
    linear-gradient(180deg, #cfd7dd, #8e99a3);
  border: 4px solid rgba(35, 42, 50, 0.62);
  border-radius: 999px;
}

.visual-sectional .visual-door {
  left: 17%;
  right: 17%;
  width: auto;
  top: 23%;
  bottom: 18%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.38), transparent 22%, rgba(0, 0, 0, 0.12)),
    repeating-linear-gradient(180deg, #c4ccd3 0 30px, #8f9aa4 30px 35px),
    repeating-linear-gradient(90deg, transparent 0 23%, rgba(255, 255, 255, 0.34) 23% 25%);
  border: 0;
}

.visual-sectional .visual-door::after {
  content: "";
  position: absolute;
  left: 16%;
  right: 16%;
  top: 20%;
  height: 20%;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.68), rgba(15, 139, 141, 0.16)),
    repeating-linear-gradient(90deg, transparent 0 30%, rgba(255, 255, 255, 0.52) 30% 33%);
  border: 3px solid rgba(255, 255, 255, 0.45);
}

.visual-sectional .visual-hardware {
  left: auto;
  right: 10%;
  top: 17%;
  width: 54px;
  height: 126px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.64), transparent),
    repeating-linear-gradient(180deg, #bac4cc 0 10px, #6d7882 10px 14px);
  border-radius: 999px 999px 4px 4px;
}

.visual-rapid .visual-door {
  left: 20%;
  right: 20%;
  width: auto;
  top: 25%;
  bottom: 15%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.36), transparent 22%, rgba(0, 0, 0, 0.12)),
    repeating-linear-gradient(180deg, #f4b12a 0 24px, #d18b12 24px 28px);
  border: 0;
}

.visual-rapid .visual-frame {
  border-color: #d7dfe4;
}

.visual-rapid .visual-hardware {
  left: 17%;
  right: 17%;
  top: 16%;
  width: auto;
  height: 34px;
  background:
    radial-gradient(circle at 24px 50%, #f3b700 0 10px, #202933 11px 15px, transparent 16px),
    linear-gradient(180deg, #edf3f6, #a9b4bd);
  border-radius: 999px;
}

.visual-rapid .visual-highlight {
  left: 19%;
  top: 24%;
  width: 62%;
  height: 58%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.2), transparent 18%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.24) 0 3px, transparent 3px 26px);
  transform: none;
}

.visual-telescopic .visual-frame {
  left: 8%;
  right: 8%;
  top: 30%;
  bottom: 21%;
  border: 0;
  background:
    linear-gradient(90deg, #2f3841 0 10px, transparent 10px calc(100% - 10px), #2f3841 calc(100% - 10px)),
    linear-gradient(180deg, transparent 0 42%, #d7dde2 42% 48%, transparent 48% 72%, #d7dde2 72% 78%, transparent 78%);
  box-shadow: none;
}

.visual-telescopic .visual-door {
  left: 16%;
  right: 16%;
  top: 43%;
  bottom: 25%;
  width: auto;
  border: 0;
  background:
    linear-gradient(135deg, transparent 0 47%, #d7dde2 47% 52%, transparent 52%),
    linear-gradient(45deg, transparent 0 47%, #d7dde2 47% 52%, transparent 52%),
    repeating-linear-gradient(90deg, #f5f7f8 0 6px, transparent 6px 36px);
  box-shadow: 0 18px 30px rgba(0, 0, 0, 0.22);
}

.visual-telescopic .visual-door.secondary {
  display: block;
  left: 22%;
  right: 22%;
  top: 50%;
  bottom: 25%;
  opacity: 0.65;
  transform: scaleX(0.9);
}

.visual-telescopic .visual-hardware {
  left: auto;
  right: 12%;
  top: 32%;
  width: 46px;
  height: 96px;
  background: linear-gradient(180deg, var(--safety), #bd8200);
  border: 4px solid #26303a;
  border-radius: 6px;
}

.visual-telescopic .visual-highlight {
  left: 14%;
  right: 14%;
  top: 40%;
  width: auto;
  height: 5px;
  background: rgba(255, 255, 255, 0.64);
  transform: none;
}

.product-copy h3,
.case-copy h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.25;
}

.product-copy p {
  margin: 12px 0 0;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.tag-row span {
  padding: 6px 10px;
  color: var(--teal);
  background: rgba(15, 139, 141, 0.1);
  border: 1px solid rgba(15, 139, 141, 0.28);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 22px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
}

.effect-grid {
  display: grid;
  gap: 24px;
}

.comparison {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: #252b32;
  box-shadow: var(--shadow);
}

.compare-frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.compare-frame.before {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent),
    linear-gradient(135deg, #4e555b, #1f2429);
}

.compare-frame.after {
  width: var(--reveal);
  border-right: 4px solid var(--safety);
  background:
    linear-gradient(135deg, rgba(15, 139, 141, 0.32), transparent 48%),
    linear-gradient(180deg, #5d6871, #1f272f);
}

.compare-label {
  position: absolute;
  left: 14px;
  top: 14px;
  z-index: 2;
  padding: 5px 9px;
  color: var(--ink);
  background: var(--white);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.after .compare-label {
  background: var(--safety);
}

.old-door,
.new-door {
  position: absolute;
  left: 13%;
  right: 13%;
  top: 24%;
  bottom: 13%;
  border: 7px solid rgba(255, 255, 255, 0.42);
}

.old-door {
  background:
    linear-gradient(20deg, transparent 0 46%, rgba(179, 76, 50, 0.5) 46% 49%, transparent 49%),
    repeating-linear-gradient(180deg, #8c9297 0 12px, #62686d 12px 16px);
}

.new-door {
  background:
    repeating-linear-gradient(180deg, #d2d9de 0 12px, #9faab3 12px 16px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.34), transparent);
}

.old-track,
.new-track {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 11%;
  height: 10px;
  background: rgba(255, 255, 255, 0.2);
}

.warning-strip {
  position: absolute;
  left: 16%;
  bottom: 8%;
  width: 40%;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--brick) 0 20px, #1b1f23 20px 40px);
}

.clean-light {
  position: absolute;
  right: 10%;
  top: 18%;
  width: 82px;
  height: 82px;
  background: rgba(243, 183, 0, 0.28);
  border-radius: 50%;
  filter: blur(12px);
}

.compare-range {
  position: absolute;
  left: 5%;
  right: 5%;
  bottom: 18px;
  z-index: 3;
  width: 90%;
  accent-color: var(--safety);
}

.case-grid {
  display: grid;
  gap: 16px;
}

.case-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 36px rgba(23, 26, 31, 0.09);
}

.case-media {
  position: relative;
  min-height: 190px;
  overflow: hidden;
}

.case-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 2px, transparent 2px 46px),
    linear-gradient(135deg, #25303a, #5c6974);
}

.case-media span {
  position: absolute;
  left: 16%;
  right: 16%;
  bottom: 12%;
  height: 62%;
  border: 7px solid rgba(255, 255, 255, 0.5);
  background: repeating-linear-gradient(180deg, #c8d0d6 0 14px, #96a1aa 14px 18px);
}

.case-media.storefront::after,
.case-media.office::after {
  content: "";
  position: absolute;
  left: 24%;
  right: 24%;
  bottom: 12%;
  height: 58%;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.7), rgba(15, 139, 141, 0.18)),
    repeating-linear-gradient(90deg, transparent 0 48%, rgba(255, 255, 255, 0.55) 48% 51%);
  border: 5px solid rgba(255, 255, 255, 0.62);
}

.case-media.storefront span {
  background: repeating-linear-gradient(180deg, #e3e7ea 0 8px, #aeb8c1 8px 13px);
}

.case-media.office span {
  left: 10%;
  right: 10%;
  height: 50%;
  background:
    linear-gradient(135deg, rgba(15, 139, 141, 0.2), transparent),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.2) 0 4px, transparent 4px 26px);
}

.case-copy {
  padding: 18px;
}

.case-copy p {
  margin: 10px 0 0;
  color: var(--muted);
}

.process-band {
  background:
    linear-gradient(90deg, rgba(243, 183, 0, 0.18), transparent 38%),
    var(--white);
}

.process-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.process-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 4px 12px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-list span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--ink);
  background: var(--safety);
  border-radius: 6px;
  font-weight: 900;
}

.process-list strong {
  font-size: 18px;
}

.process-list p {
  margin: 0;
  color: var(--muted);
}

.contact-section {
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(15, 139, 141, 0.26), transparent 42%),
    linear-gradient(145deg, #1b2026, #37414b);
}

.contact-grid {
  display: grid;
  gap: 22px;
}

.contact-grid-simple {
  align-items: stretch;
}

.contact-copy h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.22;
}

.contact-copy p {
  color: rgba(255, 255, 255, 0.74);
}

.promise-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.promise-list li {
  position: relative;
  padding: 12px 12px 12px 34px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
}

.promise-list li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 21px;
  width: 8px;
  height: 8px;
  background: var(--safety);
  border-radius: 50%;
}

.contact-card {
  display: grid;
  gap: 18px;
  align-content: start;
  padding: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-methods {
  display: grid;
  gap: 10px;
  margin: 0;
}

.contact-methods a,
.contact-methods button {
  width: 100%;
  min-height: 46px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  text-align: left;
  padding: 12px;
}

.qr-box {
  display: inline-grid;
  gap: 10px;
  place-items: center;
  padding: 16px;
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius);
}

.qr-box span {
  width: 118px;
  height: 118px;
  background:
    linear-gradient(90deg, var(--ink) 10px, transparent 10px 20px, var(--ink) 20px 30px, transparent 30px),
    linear-gradient(var(--ink) 10px, transparent 10px 20px, var(--ink) 20px 30px, transparent 30px),
    repeating-linear-gradient(45deg, var(--ink) 0 7px, transparent 7px 14px);
  background-size: 40px 40px, 40px 40px, 18px 18px;
  border: 10px solid var(--white);
  outline: 4px solid var(--ink);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 86px;
  z-index: 40;
  width: max-content;
  max-width: calc(100% - 36px);
  padding: 10px 14px;
  color: var(--white);
  background: rgba(23, 26, 31, 0.92);
  border-radius: 8px;
  transform: translate(-50%, 18px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (min-width: 720px) {
  .topbar {
    padding-inline: 32px;
  }

  .nav-toggle {
    display: none;
  }

  .nav,
  .nav.is-open {
    position: static;
    display: flex;
    gap: 8px;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .nav a {
    padding: 8px 10px;
  }

  .hero-content {
    padding-left: 56px;
  }

  .hero h1 {
    font-size: 60px;
  }

  .product-shell {
    grid-template-columns: 260px 1fr;
    align-items: start;
  }

  .product-tabs {
    grid-template-columns: 1fr;
  }

  .product-panel {
    grid-template-columns: minmax(300px, 0.95fr) 1fr;
    align-items: center;
  }

  .effect-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
  }

  .case-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .advantage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .process-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .process-list li {
    grid-template-columns: 1fr;
  }

  .process-list span {
    grid-row: auto;
  }

  .contact-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero-lead,
  .section-head h2,
  .contact-copy h2 {
    font-size: 24px;
  }

  .proof-strip {
    grid-template-columns: 1fr;
  }

  .product-tabs {
    grid-template-columns: 1fr;
  }
}