:root {
  --bg: #1b4679;
  --bg-alt: #25558f;
  --card: #2b629f;
  --line: #5f88bf;
  --text: #f1f7ff;
  --muted: #c8daf3;
  --primary: #2f5faa;
  --accent: #34b8d8;
  --lamp: #ffbf5f;
  --brand-red: #ff6700;
}

[data-theme="tech"] {
  --bg: #060d1c;
  --bg-alt: #0b1731;
  --card: #111f3f;
  --line: #2b3f70;
  --text: #d6e5ff;
  --muted: #98abd6;
  --primary: #1f6dff;
  --accent: #00d1ff;
  --lamp: #7bbcff;
  --brand-red: #ff6700;
}

[data-theme="tech"] body {
  background:
    radial-gradient(circle at 18% -12%, rgba(31, 109, 255, 0.3), transparent 46%),
    radial-gradient(circle at 84% 18%, rgba(0, 209, 255, 0.2), transparent 36%),
    radial-gradient(circle at 72% 72%, rgba(123, 188, 255, 0.08), transparent 30%),
    var(--bg);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at 12% -8%, rgba(193, 225, 255, 0.3), transparent 38%),
    radial-gradient(circle at 88% 18%, rgba(114, 206, 255, 0.24), transparent 34%),
    radial-gradient(circle at 72% 72%, rgba(255, 103, 0, 0.2), transparent 30%),
    var(--bg);
}

html {
  scroll-behavior: smooth;
}

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

.container {
  width: min(1320px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
  background:
    linear-gradient(180deg, rgba(22, 53, 90, 0.86), rgba(14, 39, 69, 0.82));
  border-bottom: 1px solid rgba(109, 144, 198, 0.5);
}

.nav {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(176, 198, 228, 0.78);
  box-shadow:
    0 5px 12px rgba(4, 14, 30, 0.22),
    0 1px 0 rgba(255, 255, 255, 0.9) inset;
  position: relative;
  overflow: hidden;
}

.brand-logo::after {
  content: none;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: contrast(1.08) saturate(1.08);
}

.brand-cn {
  margin: 0;
  font-size: 1.03rem;
  font-weight: 700;
}

.brand-en {
  margin: 0;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 1.8px;
}

.menu {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.menu a {
  color: var(--muted);
  font-size: 0.97rem;
  font-weight: 500;
  padding: 0.34rem 0.66rem;
  border-radius: 8px;
  transition: background-color 180ms ease, color 180ms ease;
}

.menu a:hover {
  color: #fff;
  background: rgba(31, 109, 255, 0.18);
}

.menu a.active {
  color: #eaf5ff;
  background:
    linear-gradient(180deg, rgba(52, 184, 216, 0.14), rgba(47, 95, 170, 0.14));
  border: 1px solid rgba(255, 103, 0, 0.62);
}

.theme-toggle {
  margin-left: 0.25rem;
  min-height: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(255, 103, 0, 0.52);
  background: rgba(11, 23, 49, 0.68);
  color: #d9f5ff;
  font-size: 0.84rem;
  padding: 0 0.66rem;
}

.theme-toggle:hover {
  border-color: rgba(255, 103, 0, 0.8);
}

.breadcrumb {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb a {
  color: #bfe7ff;
}

.hero {
  padding: 4rem 0 1.4rem;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  left: 8%;
  top: 18%;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(255, 103, 0, 0.24), transparent 68%);
  pointer-events: none;
}

[data-theme="tech"] .hero::before {
  background: radial-gradient(circle, rgba(110, 180, 255, 0.13), transparent 68%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.6rem;
  align-items: start;
}

.hero-copy {
  min-width: 0;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-width: 0;
  align-self: start;
}

.hero-side .metrics {
  margin-top: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
}

.hero-side .hero-adv-mini {
  margin-top: 0;
  grid-template-columns: 1fr;
  gap: 0.55rem;
}

.hero-panel {
  align-self: start;
}

.kicker {
  display: inline-block;
  margin: 0;
  padding: 0.3rem 0.7rem;
  border: 0;
  border-radius: 999px;
  color: #355273;
  font-size: 0.86rem;
  background: rgba(255, 103, 0, 0.12);
}

[data-theme="tech"] .kicker {
  background: rgba(0, 209, 255, 0.1);
}

h1 {
  margin: 1rem 0 0.9rem;
  font-size: clamp(2rem, 4.8vw, 3.3rem);
  line-height: 1.15;
}

.hero h1 {
  margin: 0.72rem 0 0.62rem;
  font-size: clamp(1.9rem, 4.25vw, 3rem);
  line-height: 1.12;
}

.hero-desc {
  color: var(--muted);
  max-width: 58ch;
  line-height: 1.72;
  margin: 0;
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow:
    0 8px 24px rgba(47, 95, 170, 0.3),
    0 0 0 1px rgba(255, 103, 0, 0.4) inset;
}

.btn-secondary {
  border-color: rgba(52, 184, 216, 0.58);
  color: #bde6ff;
}

.btn:hover {
  transform: translateY(-1px);
}

.metrics {
  margin-top: 1.6rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.metrics > div {
  min-width: 118px;
  padding: 0.35rem 0.45rem;
  border-radius: 0;
  border: 0;
  border-left: 2px solid rgba(52, 184, 216, 0.35);
  background: transparent;
  transition: border-color 200ms ease, transform 200ms ease;
}

.hero-side .metrics > div {
  min-width: 0;
  min-height: 56px;
  padding: 0.46rem 0.62rem;
  border-left: 3px solid rgba(52, 184, 216, 0.45);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-side .metrics > div:nth-child(1) {
  border-left-color: rgba(255, 103, 0, 0.8);
}

.hero-side .metrics > div:nth-child(2) {
  border-left-color: rgba(49, 129, 224, 0.78);
}

.hero-side .metrics > div:nth-child(3) {
  border-left-color: rgba(36, 173, 198, 0.76);
}

.metrics > div:hover {
  border-left-color: rgba(52, 184, 216, 0.7);
  transform: translateY(-1px);
}

.num {
  margin: 0;
  font-size: 1.3rem;
  color: #ffd08b;
  font-weight: 700;
}

[data-theme="tech"] .num {
  color: #cfeeff;
}

.metrics p:last-child {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.hero-side .metrics .num {
  flex: 0 0 auto;
  font-size: 1.22rem;
  line-height: 1;
}

.hero-side .metrics > div:nth-child(1) .num {
  color: #ff6700;
}

.hero-side .metrics > div:nth-child(2) .num {
  color: #2f73cd;
}

.hero-side .metrics > div:nth-child(3) .num {
  color: #1d8ea6;
}

.hero-side .metrics p:last-child {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.2;
  color: #4f6480;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero-adv-mini {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.hero-adv-mini article {
  border: 0;
  border-radius: 0;
  border-left: 3px solid var(--brand-red);
  padding: 0.28rem 0.62rem;
  background: rgba(180, 202, 232, 0.22);
}

.hero-adv-mini h3 {
  margin: 0 0 0.25rem;
  font-size: 0.88rem;
  color: #eaf4ff;
}

.hero-adv-mini p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.45;
  color: #c1d3ee;
}

.hero-panel {
  border: 1px solid rgba(43, 63, 112, 0.95);
  border-radius: 16px;
  padding: 0.95rem 1rem;
  background:
    linear-gradient(160deg, rgba(32, 215, 255, 0.08), transparent 40%),
    linear-gradient(220deg, rgba(255, 103, 0, 0.16), transparent 55%),
    rgba(37, 82, 135, 0.56);
  position: relative;
  overflow: hidden;
}

[data-theme="tech"] .hero-panel {
  background:
    linear-gradient(160deg, rgba(0, 209, 255, 0.1), transparent 40%),
    linear-gradient(220deg, rgba(31, 109, 255, 0.08), transparent 52%),
    rgba(14, 30, 58, 0.74);
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: -35% -20% auto auto;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(0, 209, 255, 0.18), transparent 65%);
  pointer-events: none;
}

.hero-panel h3 {
  margin: 0.1rem 0 0.35rem;
}

.panel-image {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(52vh, 340px);
  object-fit: contain;
  object-position: center top;
  border-radius: 10px;
  border: 1px solid rgba(0, 209, 255, 0.32);
  margin-bottom: 0.65rem;
  background: rgba(8, 20, 43, 0.72);
}

.hero-panel ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.48;
  font-size: 0.92rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(56, 104, 164, 0.32), rgba(31, 71, 122, 0.26));
  border-top: 1px solid rgba(109, 144, 198, 0.36);
  border-bottom: 1px solid rgba(109, 144, 198, 0.36);
}

.home-soft {
  background:
    linear-gradient(180deg, rgba(54, 96, 150, 0.18), rgba(33, 72, 122, 0.1));
  border-top: 1px solid rgba(109, 144, 198, 0.22);
  border-bottom: 1px solid rgba(109, 144, 198, 0.2);
}

.home-warm {
  background:
    linear-gradient(180deg, rgba(255, 103, 0, 0.16), rgba(47, 93, 149, 0.14));
  border-top: 1px solid rgba(255, 103, 0, 0.22);
  border-bottom: 1px solid rgba(109, 144, 198, 0.2);
}

.home-warm-2 {
  background:
    linear-gradient(180deg, rgba(38, 82, 134, 0.26), rgba(255, 103, 0, 0.12));
  border-top: 1px solid rgba(109, 144, 198, 0.24);
  border-bottom: 1px solid rgba(255, 103, 0, 0.22);
}

.home-deep {
  background:
    linear-gradient(180deg, rgba(33, 76, 127, 0.36), rgba(27, 62, 109, 0.28));
}

[data-theme="tech"] .section-alt {
  background:
    linear-gradient(180deg, rgba(10, 23, 50, 0.95), rgba(6, 13, 28, 0.96));
}

h2 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.6rem, 3.1vw, 2.1rem);
}

.section-intro {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.8;
}

.section-visuals {
  padding-top: 1.65rem;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.visual-card {
  border: 1px solid rgba(109, 144, 198, 0.6);
  border-radius: 14px;
  padding: 0.8rem;
  background: rgba(39, 83, 138, 0.42);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.visual-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  border-radius: 10px;
  border: 1px solid rgba(0, 209, 255, 0.28);
}

.visual-card h3 {
  margin: 0.72rem 0 0.42rem;
  font-size: 1rem;
}

.visual-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.62;
  min-height: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.visual-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 209, 255, 0.5);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.22);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.adv-grid article {
  border: 1px solid rgba(109, 144, 198, 0.6);
  border-radius: 14px;
  padding: 1.05rem 1.1rem;
  background: linear-gradient(180deg, rgba(49, 95, 151, 0.42), rgba(32, 72, 124, 0.38));
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.adv-media {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.adv-copy {
  min-width: 0;
}

.adv-grid h3 {
  margin: 0;
  color: #eef5ff;
  font-size: 1.05rem;
}

.adv-grid p {
  margin: 0.2rem 0 0;
  color: #b8c9ea;
  line-height: 1.62;
}

.adv-icon {
  width: 50px;
  height: 50px;
  flex: 0 0 50px;
  filter: drop-shadow(0 0 10px rgba(0, 209, 255, 0.42));
}

.adv-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 209, 255, 0.62);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.26), 0 0 0 1px rgba(0, 209, 255, 0.12) inset;
}

.jump-more {
  margin: 1rem 0 0;
}

.jump-more a {
  color: #2f73cd;
  font-size: 0.92rem;
  font-weight: 600;
}

.cap-grid,
.solution-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.solution-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.1rem;
  align-items: stretch;
}

.solution-menu {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  border: 1px solid rgba(174, 195, 225, 0.82);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 20px rgba(14, 39, 71, 0.035);
  padding: 0.7rem;
  height: 100%;
}

.solution-item {
  text-align: left;
  min-height: 48px;
  border: 1px solid rgba(109, 144, 198, 0.5);
  background: rgba(255, 255, 255, 0.72);
  color: #203650;
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  font-size: 0.98rem;
  line-height: 1.5;
}

.solution-item:hover {
  transform: none;
  box-shadow: none;
  border-color: rgba(101, 153, 221, 0.6);
}

.solution-item.active {
  background: linear-gradient(180deg, rgba(52, 184, 216, 0.14), rgba(47, 95, 170, 0.1));
  border-color: rgba(255, 103, 0, 0.62);
  color: #10243c;
}

.solution-detail-card {
  border: 1px solid rgba(174, 195, 225, 0.82);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 20px rgba(14, 39, 71, 0.035);
  padding: 1.1rem 1.15rem;
  height: 100%;
}

.solution-main {
  display: grid;
  grid-template-columns: 1.28fr 0.72fr;
  gap: 1.15rem;
  align-items: start;
}

.solution-copy {
  min-width: 0;
}

.solution-visual {
  border: 0;
  border-radius: 12px;
  background: rgba(248, 252, 255, 0.92);
  padding: 0.22rem;
  box-shadow:
    0 12px 24px rgba(20, 49, 86, 0.07);
  overflow: hidden;
}

.solution-detail-card h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.6rem, 3vw, 2.05rem);
  letter-spacing: 0.2px;
  line-height: 1.22;
  font-weight: 700;
}

.solution-cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  border: 0;
  margin-bottom: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
  display: block;
}

.solution-detail-card h3 {
  margin: 1.05rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #132b46;
  position: relative;
  padding-left: 0.55rem;
  letter-spacing: 0.15px;
}

.solution-detail-card h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2rem;
  width: 3px;
  height: 1rem;
  border-radius: 2px;
  background: linear-gradient(180deg, #34b8d8, #ff6700);
}

.solution-detail-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  font-size: 1rem;
  font-weight: 400;
}

.solution-desc {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
  max-width: 72ch;
  line-height: 1.85;
}

.solution-points {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.85;
  max-width: 72ch;
}

.solution-points li {
  margin-bottom: 0.24rem;
}

.solution-points li .point-label {
  color: #ff6700;
  font-weight: 700;
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.15rem;
}

.solution-tags span {
  border: 1px solid rgba(114, 156, 214, 0.5);
  border-radius: 999px;
  padding: 0.32rem 0.68rem;
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--muted);
  background: rgba(232, 245, 255, 0.8);
}

.cap-grid article,
.solution-grid article,
.case-grid article {
  border: 1px solid rgba(109, 144, 198, 0.58);
  border-radius: 14px;
  padding: 1.05rem 1.1rem;
  background: linear-gradient(180deg, rgba(15, 34, 68, 0.82), rgba(11, 25, 50, 0.78));
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.cap-grid h3,
.solution-grid h3,
.case-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.cap-title {
  display: flex;
  align-items: center;
  gap: 0.62rem;
  margin-bottom: 0.52rem;
}

.cap-grid .cap-title h3 {
  margin: 0;
  font-size: 1.06rem;
  letter-spacing: 0.2px;
  color: #eef5ff;
}

.cap-icon {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  filter: drop-shadow(0 0 10px rgba(0, 209, 255, 0.42));
}

.cap-grid article p {
  color: #b8c9ea;
  line-height: 1.72;
}

.cap-grid article:hover {
  border-color: rgba(0, 209, 255, 0.62);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.26), 0 0 0 1px rgba(0, 209, 255, 0.12) inset;
}

.cap-grid p,
.solution-grid p,
.case-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.cap-grid article:hover,
.solution-grid article:hover,
.case-grid article:hover,
.platform-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 209, 255, 0.5);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.22);
}

.product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.product-showcase {
  margin: 0 0 1.85rem;
}

.product-showcase-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 1.2rem;
  align-items: start;
}

.product-showcase-visual {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(109, 144, 198, 0.5);
  background: rgba(8, 20, 43, 0.45);
}

.product-showcase-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(46vh, 300px);
  object-fit: contain;
  object-position: center top;
}

.product-showcase-copy h3 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.12rem, 1.5vw, 1.32rem);
}

.product-showcase-copy ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.58;
  font-size: 0.91rem;
}

.product-showcase-more {
  margin: 0.8rem 0 0;
}

.product-showcase-more a {
  font-size: 0.92rem;
  font-weight: 600;
  color: #9fd7ff;
}

.product-carousel {
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  gap: 0.7rem;
  align-items: center;
}

.product-track-wrap {
  overflow-x: hidden;
  overflow-y: visible;
  padding-top: 8px;
  /* 避免与 overflow-x 组合时纵向被裁剪，留出卡片底边与 hover 阴影 */
  padding-bottom: 18px;
  margin-bottom: 2px;
}

.product-track {
  display: flex;
  gap: 0.8rem;
  transition: transform 300ms ease;
  will-change: transform;
}

.product-card {
  min-width: calc((100% - 1.6rem) / 3);
  border: 1px solid rgba(109, 144, 198, 0.58);
  border-radius: 14px;
  padding: 0.9rem;
  background: linear-gradient(180deg, rgba(49, 95, 151, 0.42), rgba(32, 72, 124, 0.38));
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.product-photo {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  object-position: center;
  max-height: 150px;
  padding: 0.35rem;
  border-radius: 10px;
  border: 0;
  margin-bottom: 0.62rem;
  background: linear-gradient(180deg, rgba(247, 251, 255, 0.96), rgba(238, 246, 255, 0.92));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.92) inset,
    0 4px 10px rgba(38, 86, 150, 0.08);
  transition: transform 280ms ease, filter 280ms ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 184, 216, 0.72);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(52, 184, 216, 0.16) inset;
}

.product-card:hover .product-photo {
  transform: scale(1.03);
  filter: saturate(1.03) brightness(1.01);
}

.product-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.32rem;
}

.product-icon {
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  filter: drop-shadow(0 0 8px rgba(0, 209, 255, 0.35));
  display: none;
}

.product-card h3 {
  margin: 0;
  font-size: 1rem;
}

.product-card p {
  margin: 0;
  color: #b8c9ea;
  line-height: 1.6;
  font-size: 0.9rem;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  min-height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(109, 144, 198, 0.58);
  background: rgba(35, 78, 132, 0.72);
  color: #d9f5ff;
  font-size: 1.25rem;
}

.carousel-dots {
  margin-top: 0.8rem;
  display: flex;
  gap: 0.45rem;
  justify-content: center;
}

.carousel-dot {
  width: 6px;
  height: 6px;
  min-height: 6px;
  padding: 0;
  line-height: 1;
  border-radius: 999px;
  border: 0;
  background: rgba(159, 183, 224, 0.45);
  cursor: pointer;
  box-shadow: none;
  transform: none;
  transition: width 180ms ease, background-color 180ms ease;
}

.carousel-dot.active {
  width: 14px;
  background: rgba(0, 209, 255, 0.9);
}

.chip {
  border: 1px solid rgba(0, 209, 255, 0.42);
  color: #c9efff;
  border-radius: 999px;
  padding: 0.46rem 0.95rem;
  background: rgba(0, 209, 255, 0.08);
  font-size: 0.9rem;
  transition: transform 200ms ease, background-color 200ms ease;
}

.chip:hover {
  transform: translateY(-2px);
  background: rgba(0, 209, 255, 0.15);
}

.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.platform-grid article {
  border: 1px solid rgba(109, 144, 198, 0.62);
  border-radius: 14px;
  padding: 1rem;
  background: rgba(39, 83, 138, 0.42);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.platform-grid ul {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.7;
}

.about-text {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.85;
  max-width: 72ch;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.16fr 0.84fr;
  gap: 1.15rem;
}

.contact-form {
  border: 1px solid rgba(109, 144, 198, 0.62);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  padding: 1.05rem;
  display: grid;
  gap: 0.75rem;
  box-shadow: 0 10px 24px rgba(21, 49, 84, 0.055);
}

.form-tip {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.contact-form label {
  display: grid;
  gap: 0.36rem;
  font-size: 0.88rem;
  color: #5b6f86;
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  background: rgba(249, 252, 255, 0.98);
  color: #1b2f48;
  border: 1px solid rgba(176, 198, 226, 0.92);
  border-radius: 10px;
  padding: 0.66rem 0.76rem;
  font: inherit;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

input::placeholder,
textarea::placeholder {
  color: #8ca0ba;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: rgba(57, 132, 228, 0.75);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(70, 148, 234, 0.14);
}

.contact-form button {
  min-height: 42px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

button {
  min-height: 40px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #2f85ff);
  color: #fff;
  font-size: 0.94rem;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(31, 109, 255, 0.3);
}

.site-footer {
  border-top: 1px solid rgba(43, 63, 112, 0.5);
  padding: 1rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-inner p {
  margin: 0;
  line-height: 1.4;
}

.footer-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.footer-meta a {
  color: inherit;
}

.footer-meta a:hover {
  text-decoration: underline;
}

.to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(0, 209, 255, 0.45);
  background: rgba(11, 23, 49, 0.88);
  color: #d9f5ff;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease, border-color 180ms ease;
}

.to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.to-top:hover {
  border-color: rgba(0, 209, 255, 0.78);
}

.not-found-wrap {
  text-align: center;
  padding-top: 12vh;
}

.glow-title {
  text-shadow:
    0 0 22px rgba(42, 125, 255, 0.35),
    0 0 12px rgba(255, 103, 0, 0.28);
}

[data-theme="tech"] .glow-title {
  text-shadow:
    0 0 22px rgba(31, 109, 255, 0.45),
    0 0 12px rgba(0, 209, 255, 0.26);
}

[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 560ms ease, transform 560ms ease;
}

[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}

.page-hero {
  padding: 2rem 0 1rem;
  border-bottom: 1px solid rgba(109, 144, 198, 0.4);
  background:
    radial-gradient(circle at 80% -15%, rgba(42, 125, 255, 0.2), transparent 40%),
    radial-gradient(circle at 20% 10%, rgba(255, 103, 0, 0.18), transparent 42%),
    var(--bg-alt);
}

.page-hero-lead {
  display: none;
}

[data-theme="tech"] .page-hero {
  background:
    radial-gradient(circle at 80% -15%, rgba(31, 109, 255, 0.28), transparent 40%),
    radial-gradient(circle at 20% 10%, rgba(0, 209, 255, 0.1), transparent 38%),
    var(--bg);
}

[data-theme="tech"] .theme-toggle {
  border-color: rgba(0, 209, 255, 0.6);
  background: rgba(8, 18, 38, 0.88);
}

[data-theme="tech"] .menu a.active {
  border-color: rgba(255, 155, 61, 0.65);
}

/* Default theme: light background with dark text */
html:not([data-theme="tech"]) {
  --text: #142235;
  --muted: #4f647d;
}

html:not([data-theme="tech"]) body {
  color: #142235;
  background:
    radial-gradient(circle at 12% -8%, rgba(166, 209, 255, 0.25), transparent 38%),
    radial-gradient(circle at 88% 18%, rgba(120, 196, 255, 0.2), transparent 34%),
    radial-gradient(circle at 72% 72%, rgba(255, 103, 0, 0.1), transparent 28%),
    #f4f8fd;
}

html:not([data-theme="tech"]) .hero {
  background: #ffffff;
  border-bottom: 1px solid rgba(187, 204, 228, 0.5);
}

html:not([data-theme="tech"]) .site-header {
  background:
    radial-gradient(ellipse 120% 180% at 12% -40%, rgba(52, 184, 216, 0.18), transparent 55%),
    radial-gradient(ellipse 90% 120% at 92% 0%, rgba(255, 103, 0, 0.12), transparent 45%),
    linear-gradient(180deg, rgba(26, 58, 99, 0.88) 0%, rgba(20, 47, 82, 0.84) 48%, rgba(15, 39, 69, 0.84) 100%);
  border-bottom: 1px solid rgba(90, 140, 198, 0.45);
  box-shadow:
    0 8px 24px rgba(8, 22, 42, 0.28),
    0 1px 0 rgba(255, 255, 255, 0.06) inset;
}

html:not([data-theme="tech"]) .site-header .brand-cn {
  color: #f4f9ff;
}

html:not([data-theme="tech"]) .site-header .brand-en {
  color: rgba(214, 228, 245, 0.78);
  letter-spacing: 1.6px;
}

html:not([data-theme="tech"]) .site-header .brand-logo {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(176, 198, 228, 0.82);
  box-shadow:
    0 5px 12px rgba(4, 14, 30, 0.2),
    0 1px 0 rgba(255, 255, 255, 0.92) inset;
}

html:not([data-theme="tech"]) .site-header .menu a {
  color: #ffffff;
  font-weight: 520;
}

html:not([data-theme="tech"]) .site-header .menu a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

html:not([data-theme="tech"]) .site-header .menu a.active {
  color: #ff7a1f;
  font-weight: 600;
  background: transparent;
  border: 0;
  box-shadow: none;
  text-decoration: none;
}

html:not([data-theme="tech"]) .brand-en,
html:not([data-theme="tech"]) .menu a,
html:not([data-theme="tech"]) .section-intro,
html:not([data-theme="tech"]) .hero-desc,
html:not([data-theme="tech"]) .metrics p:last-child,
html:not([data-theme="tech"]) .about-text,
html:not([data-theme="tech"]) .solution-desc,
html:not([data-theme="tech"]) .solution-points,
html:not([data-theme="tech"]) .platform-grid ul,
html:not([data-theme="tech"]) .cap-grid p,
html:not([data-theme="tech"]) .solution-grid p,
html:not([data-theme="tech"]) .case-grid p,
html:not([data-theme="tech"]) .product-card p,
html:not([data-theme="tech"]) .visual-card p,
html:not([data-theme="tech"]) .adv-grid p,
html:not([data-theme="tech"]) .footer-inner,
html:not([data-theme="tech"]) .form-tip {
  color: #41566f;
}

html:not([data-theme="tech"]) .page-hero p,
html:not([data-theme="tech"]) .breadcrumb,
html:not([data-theme="tech"]) .breadcrumb a {
  color: #4b6280;
}

html:not([data-theme="tech"]) .solution-tags span {
  color: #4b6280;
}

html:not([data-theme="tech"]) .page-hero h1,
html:not([data-theme="tech"]) .solution-detail-card h2,
html:not([data-theme="tech"]) .solution-detail-card h3 {
  color: #10243c;
}

html:not([data-theme="tech"]) h1,
html:not([data-theme="tech"]) h2,
html:not([data-theme="tech"]) h3,
html:not([data-theme="tech"]) .num,
html:not([data-theme="tech"]) .hero-panel h3,
html:not([data-theme="tech"]) .cap-grid h3,
html:not([data-theme="tech"]) .solution-grid h3,
html:not([data-theme="tech"]) .case-grid h3,
html:not([data-theme="tech"]) .adv-grid h3 {
  color: #101f33;
}

html:not([data-theme="tech"]) .menu a:hover {
  color: #0f1d2f;
  background: rgba(61, 128, 214, 0.17);
}

html:not([data-theme="tech"]) .menu a.active {
  color: #10233b;
  background: linear-gradient(180deg, rgba(255, 103, 0, 0.34), rgba(255, 103, 0, 0.24));
  border-color: rgba(255, 103, 0, 0.9);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.72) inset,
    0 4px 10px rgba(255, 103, 0, 0.2);
}

html:not([data-theme="tech"]) .menu a {
  color: #23384f;
  font-weight: 550;
}

html:not([data-theme="tech"]) .brand-en {
  color: #5c6f86;
}

html:not([data-theme="tech"]) .theme-toggle {
  background: #ffffff;
  color: #142235;
  border-color: rgba(255, 103, 0, 0.6);
}

html:not([data-theme="tech"]) .hero-panel,
html:not([data-theme="tech"]) .visual-card,
html:not([data-theme="tech"]) .adv-grid article,
html:not([data-theme="tech"]) .cap-grid article,
html:not([data-theme="tech"]) .solution-grid article,
html:not([data-theme="tech"]) .case-grid article,
html:not([data-theme="tech"]) .product-card,
html:not([data-theme="tech"]) .platform-grid article,
html:not([data-theme="tech"]) .contact-form,
html:not([data-theme="tech"]) .metrics > div {
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(174, 195, 225, 0.82);
  box-shadow: 0 8px 20px rgba(14, 39, 71, 0.035);
}

html:not([data-theme="tech"]) .hero-side .metrics > div {
  background: rgba(255, 255, 255, 0.98);
  border-left-color: rgba(52, 130, 214, 0.5);
  box-shadow: 0 2px 10px rgba(14, 39, 71, 0.045);
}

html:not([data-theme="tech"]) .hero-panel {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(176, 197, 226, 0.7);
  box-shadow: 0 10px 28px rgba(14, 39, 71, 0.05);
}

html:not([data-theme="tech"]) .hero-panel::after {
  background: radial-gradient(circle, rgba(112, 173, 247, 0.1), transparent 68%);
}

html:not([data-theme="tech"]) .panel-image {
  background: linear-gradient(180deg, rgba(240, 246, 255, 0.98), rgba(228, 238, 250, 0.96));
  border-color: rgba(150, 178, 218, 0.55);
}

html:not([data-theme="tech"]) .section-alt,
html:not([data-theme="tech"]) .home-soft,
html:not([data-theme="tech"]) .home-warm,
html:not([data-theme="tech"]) .home-warm-2,
html:not([data-theme="tech"]) .home-deep {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(246, 250, 255, 0.82));
  border-top: 1px solid rgba(187, 204, 228, 0.52);
  border-bottom: 1px solid rgba(187, 204, 228, 0.52);
}

html:not([data-theme="tech"]) #products.home-soft {
  background:
    radial-gradient(circle at 12% 0%, rgba(114, 173, 245, 0.12), transparent 34%),
    radial-gradient(circle at 88% 0%, rgba(255, 103, 0, 0.09), transparent 28%),
    linear-gradient(180deg, rgba(250, 253, 255, 0.96), rgba(241, 247, 255, 0.92));
  border-top: 1px solid rgba(179, 200, 230, 0.64);
  border-bottom: 1px solid rgba(179, 200, 230, 0.64);
}

html:not([data-theme="tech"]) #cases.section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 252, 255, 0.94));
  border-top: 1px solid rgba(187, 204, 228, 0.52);
  border-bottom: 1px solid rgba(187, 204, 228, 0.52);
}

/* 产品体系：品牌橙点缀（链接、分页、标题装饰，避免整段正文全橙） */
html:not([data-theme="tech"]) #products.home-soft > .container > h2 {
  padding-left: 0.75rem;
  border-left: 4px solid var(--brand-red);
  margin-left: 0;
}

html:not([data-theme="tech"]) #products .product-card h3 {
  color: #10243c;
  font-weight: 600;
}

html:not([data-theme="tech"]) #products .jump-more a {
  color: #2f73cd;
  font-weight: 600;
}

html:not([data-theme="tech"]) #products .jump-more a:hover {
  color: var(--brand-red);
  text-decoration: underline;
}

html:not([data-theme="tech"]) .jump-more a:hover {
  color: var(--brand-red);
  text-decoration: underline;
}

html:not([data-theme="tech"]) #products .carousel-dot.active {
  background: rgba(42, 125, 200, 0.95);
}

html:not([data-theme="tech"]) #products .carousel-btn {
  border-color: rgba(130, 168, 218, 0.75);
  background: linear-gradient(145deg, rgba(36, 78, 132, 0.95), rgba(24, 58, 108, 0.98));
}

html:not([data-theme="tech"]) #products .carousel-btn:hover {
  border-color: rgba(52, 136, 220, 0.85);
  box-shadow: 0 6px 18px rgba(42, 125, 200, 0.22);
}

html:not([data-theme="tech"]) #products .product-track-wrap {
  padding-bottom: 20px;
}

html:not([data-theme="tech"]) #products .product-showcase {
  padding: 1rem 1.08rem;
  border: 1px solid rgba(174, 195, 225, 0.82);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 22px rgba(14, 39, 71, 0.045);
}

html:not([data-theme="tech"]) #products .product-showcase-visual {
  background: linear-gradient(180deg, rgba(240, 246, 255, 0.98), rgba(228, 238, 250, 0.96));
  border-color: rgba(150, 178, 218, 0.55);
}

html:not([data-theme="tech"]) #products .product-showcase-copy h3 {
  color: #10243c;
}

html:not([data-theme="tech"]) #products .product-showcase-copy ul {
  color: #4b6280;
}

html:not([data-theme="tech"]) #products .product-showcase-more a {
  color: #2f73cd;
}

html:not([data-theme="tech"]) .page-hero {
  background:
    radial-gradient(circle at 80% -15%, rgba(112, 173, 247, 0.2), transparent 40%),
    radial-gradient(circle at 20% 10%, rgba(255, 103, 0, 0.12), transparent 42%),
    #eef4fb;
  border-bottom-color: rgba(180, 200, 226, 0.6);
}

html:not([data-theme="tech"]) input,
html:not([data-theme="tech"]) textarea {
  color: #101f33;
  background: rgba(248, 251, 255, 0.95);
  border-color: rgba(170, 192, 222, 0.85);
}

html:not([data-theme="tech"]) .contact-form {
  border-color: rgba(167, 190, 221, 0.86);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 252, 255, 0.94));
}

html:not([data-theme="tech"]) .hero-panel ul,
html:not([data-theme="tech"]) .hero-panel li,
html:not([data-theme="tech"]) .hero-adv-mini p {
  color: #4e627a;
}

html:not([data-theme="tech"]) .hero-adv-mini article {
  background: rgba(180, 202, 232, 0.16);
  border-left-color: var(--brand-red);
}

html:not([data-theme="tech"]) .btn-primary {
  color: #fff;
  box-shadow: 0 6px 16px rgba(27, 102, 184, 0.18);
}

html:not([data-theme="tech"]) .btn-secondary {
  color: #234261;
  border-color: rgba(102, 146, 201, 0.6);
  background: rgba(255, 255, 255, 0.72);
}

html:not([data-theme="tech"]) .product-card p,
html:not([data-theme="tech"]) .cap-grid p,
html:not([data-theme="tech"]) .solution-grid p,
html:not([data-theme="tech"]) .case-grid p {
  color: #47607b;
}

html:not([data-theme="tech"]) .product-photo {
  border: 0;
  background: linear-gradient(180deg, rgba(248, 252, 255, 0.98), rgba(239, 247, 255, 0.95));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.95) inset,
    0 4px 10px rgba(46, 96, 161, 0.08);
}

html:not([data-theme="tech"]) .product-card:hover .product-photo {
  filter: saturate(1.02) brightness(1.02);
}

html:not([data-theme="tech"]) .adv-grid article {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 252, 255, 0.9));
  border: 1px solid rgba(180, 202, 232, 0.78);
  border-radius: 14px;
  box-shadow:
    0 10px 22px rgba(21, 49, 84, 0.045),
    0 1px 0 rgba(255, 255, 255, 0.9) inset;
}

html:not([data-theme="tech"]) .adv-grid article:hover {
  border-color: rgba(116, 165, 225, 0.72);
  box-shadow:
    0 14px 28px rgba(21, 49, 84, 0.07),
    0 0 0 1px rgba(104, 158, 223, 0.12) inset;
}

html:not([data-theme="tech"]) .adv-grid h3 {
  color: #10243c;
  letter-spacing: 0.2px;
}

html:not([data-theme="tech"]) .adv-grid p {
  color: #4b6481;
}

html:not([data-theme="tech"]) .adv-icon {
  padding: 8px;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(231, 244, 255, 0.9), rgba(220, 238, 255, 0.78));
  box-shadow: 0 4px 10px rgba(73, 122, 182, 0.12);
}

html:not([data-theme="tech"]) .table-wrap {
  border: 1px solid rgba(160, 186, 222, 0.82);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 24px rgba(21, 49, 84, 0.06);
}

html:not([data-theme="tech"]) table {
  background: #ffffff;
}

html:not([data-theme="tech"]) th {
  color: #f4f8ff;
  background: linear-gradient(180deg, #2a4d7e, #243f67);
  border-bottom: 1px solid rgba(43, 74, 116, 0.65);
}

html:not([data-theme="tech"]) td {
  color: #2d435e;
  border-bottom: 1px solid rgba(186, 205, 231, 0.72);
}

html:not([data-theme="tech"]) tbody tr:nth-child(even) td {
  background: rgba(244, 249, 255, 0.8);
}

html:not([data-theme="tech"]) tbody tr:hover td {
  background: rgba(232, 243, 255, 0.94);
}

.page-hero p {
  color: var(--muted);
  max-width: 100ch;
  font-size: 1.04rem;
  line-height: 1.85;
}

.page-hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.05rem);
  line-height: 1.16;
}

.hero-product-carousel {
  margin-top: 1rem;
}

.page-hero-products {
  padding-top: 1.4rem;
  padding-bottom: 1.2rem;
}

.section-gap-top {
  margin-top: 2rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(43, 63, 112, 0.8);
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
  background: rgba(17, 31, 63, 0.5);
}

th,
td {
  border-bottom: 1px solid rgba(43, 63, 112, 0.65);
  padding: 0.8rem;
  text-align: left;
  font-size: 0.9rem;
}

th {
  color: #cfe8ff;
  background: rgba(11, 23, 49, 0.75);
}

td {
  color: var(--muted);
}

@media (max-width: 960px) {
  .menu a {
    font-size: 0.93rem;
  }

  .theme-toggle {
    font-size: 0.8rem;
  }

  .page-hero h1 {
    font-size: clamp(1.8rem, 4.6vw, 2.2rem);
  }

  .page-hero p {
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .solution-item {
    font-size: 0.95rem;
  }

  .solution-detail-card h2 {
    font-size: clamp(1.56rem, 4vw, 1.82rem);
  }

  .solution-detail-card h3 {
    font-size: 1.05rem;
  }

  .solution-desc {
    font-size: 0.96rem;
    line-height: 1.82;
  }

  .solution-points {
    font-size: 0.96rem;
    line-height: 1.82;
  }

  .solution-tags span {
    font-size: 0.84rem;
  }

  .hero-grid,
  .contact-grid,
  .platform-grid,
  .solution-layout {
    grid-template-columns: 1fr;
  }

  .hero-side .metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.55rem;
  }

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

  .solution-main {
    grid-template-columns: 1fr;
  }

  .solution-cover {
    aspect-ratio: 16 / 9;
  }

  .cap-grid,
  .solution-grid,
  .case-grid,
  .visual-grid,
  .adv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-adv-mini {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-width: calc((100% - 0.8rem) / 2);
  }
}

@media (max-width: 640px) {
  html,
  body {
    font-size: 15px;
  }

  .brand-cn {
    font-size: 0.98rem;
  }

  .brand-en {
    font-size: 0.68rem;
  }

  .page-hero h1 {
    font-size: clamp(1.62rem, 7vw, 1.95rem);
  }

  .page-hero p {
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .solution-item {
    font-size: 0.93rem;
  }

  .solution-detail-card h2 {
    font-size: 1.42rem;
  }

  .solution-detail-card h3 {
    font-size: 1rem;
  }

  .solution-desc,
  .solution-points {
    font-size: 0.94rem;
    line-height: 1.8;
  }

  .solution-tags span {
    font-size: 0.8rem;
  }

  .menu {
    display: none;
  }

  .hero {
    padding-top: 4.5rem;
  }

  .cap-grid,
  .solution-grid,
  .case-grid,
  .visual-grid,
  .adv-grid {
    grid-template-columns: 1fr;
  }

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

  .carousel-btn {
    display: none;
  }

  .carousel-dots {
    display: none;
  }

  .product-track-wrap {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .product-track {
    width: max-content;
    padding-bottom: 0.85rem;
  }

  .product-card {
    min-width: min(84vw, 320px);
    scroll-snap-align: start;
  }

  .product-photo {
    aspect-ratio: 16 / 9;
    max-height: none;
  }
}