.yc-page {
  --ink: #08161f;
  --ink-2: #0f2a3a;
  --paper: #f6f5f0;
  --card: #ffffff;
  --text: #1a2933;
  --muted: #556a74;
  --accent: #0a7a5c;
  --accent-soft: #e2f0ea;
  --accent-light: #7fe9c6;
  --line: rgba(8, 22, 31, 0.13);
  --radius: 18px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.72;
  color: var(--text);
  background-color: var(--paper);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

.yc-page *,
.yc-page *::before,
.yc-page *::after {
  box-sizing: border-box;
}

.yc-page h1,
.yc-page h2,
.yc-page h3 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.yc-page p,
.yc-page dl,
.yc-page dd,
.yc-page figure {
  margin: 0;
}

.yc-page ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.yc-page img {
  display: block;
  max-width: 100%;
  height: auto;
}

.yc-page a {
  color: inherit;
}

.yc-page :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.yc-hero :focus-visible,
.yc-contact :focus-visible,
.yc-footer :focus-visible {
  outline-color: var(--accent-light);
}

.yc-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 0.75rem 1.25rem;
  background: var(--ink);
  color: #fff;
  border-radius: 0 0 10px 0;
  text-decoration: none;
}

.yc-skip:focus {
  left: 0;
}

/* ---------- header ---------- */
.yc-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 245, 240, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.yc-topbar {
  background: var(--ink);
  color: #dbe8ea;
  font-size: 0.78rem;
}

.yc-topbar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.45rem 1.5rem;
}

.yc-topbar-text {
  letter-spacing: 0.16em;
  color: #9db6ba;
}

.yc-topbar-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.yc-lang {
  padding: 0.1rem 0.55rem;
  border: 1px solid rgba(219, 232, 234, 0.3);
  border-radius: 999px;
  color: #c8dde0;
}

.yc-topbar-links a {
  color: var(--accent-light);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.yc-topbar-links a:hover {
  color: #fff;
}

.yc-nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
}

.yc-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.yc-brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(150deg, var(--ink) 0%, #0c3a32 100%);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0;
}

.yc-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.yc-brand-text strong {
  font-size: 1.06rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.yc-brand-text small {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.yc-menu {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.8vw, 1.6rem);
  margin-left: auto;
}

.yc-menu a {
  position: relative;
  padding: 0.4rem 0;
  font-size: 0.94rem;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.yc-menu a:not(.yc-nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.yc-menu a:not(.yc-nav-cta):hover::after,
.yc-menu a:not(.yc-nav-cta):focus-visible::after {
  transform: scaleX(1);
}

.yc-menu .yc-nav-cta {
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
}

.yc-menu .yc-nav-cta:hover {
  background: #06634a;
}

.yc-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.yc-nav-toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.yc-nav-toggle-bars i {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.yc-nav-toggle[aria-expanded="true"] .yc-nav-toggle-bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.yc-nav-toggle[aria-expanded="true"] .yc-nav-toggle-bars i:nth-child(2) {
  opacity: 0;
}

.yc-nav-toggle[aria-expanded="true"] .yc-nav-toggle-bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- hero ---------- */
.yc-hero {
  position: relative;
  isolation: isolate;
  color: #e8f1f2;
  background-color: var(--ink);
  background-image:
    radial-gradient(115% 80% at 84% 4%, rgba(13, 122, 96, 0.5) 0%, rgba(8, 22, 31, 0) 58%),
    radial-gradient(90% 70% at 4% 96%, rgba(58, 91, 122, 0.32) 0%, rgba(8, 22, 31, 0) 62%),
    linear-gradient(180deg, #08161f 0%, #0b1e29 100%);
}

.yc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.06) 0 1px, rgba(255, 255, 255, 0) 1px 110px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.06) 0 1px, rgba(255, 255, 255, 0) 1px 110px);
  pointer-events: none;
}

.yc-slider-viewport {
  position: relative;
  max-width: 1320px;
  margin: 0 auto;
  padding: clamp(0.9rem, 2.4vw, 1.75rem) clamp(0.75rem, 2.4vw, 1.75rem) 0;
}

.yc-slides {
  display: grid;
  overflow: hidden;
  border-radius: 26px;
  box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.95);
}

.yc-slide {
  position: relative;
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  min-height: clamp(430px, calc(300px + 26vw), 620px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.yc-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.yc-page .yc-slide-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  transform-origin: 50% 50%;
  transition: transform 0.9s ease, object-position 0.9s ease;
}

/* 三张幻灯共用同一张源图：分别取左 / 中 / 右画幅，裁出不同的构图 */
.yc-slide--crop-left .yc-slide-img {
  object-position: 0% 50%;
  transform: scale(1.08) translateX(2.5%);
}

.yc-slide--crop-center .yc-slide-img {
  object-position: 50% 50%;
  transform: scale(1.04);
}

.yc-slide--crop-right .yc-slide-img {
  object-position: 100% 50%;
  transform: scale(1.08) translateX(-2.5%);
}

.yc-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(96deg, rgba(6, 17, 24, 0.93) 0%, rgba(6, 17, 24, 0.8) 40%, rgba(6, 17, 24, 0.3) 78%, rgba(6, 17, 24, 0.14) 100%),
    linear-gradient(0deg, rgba(6, 17, 24, 0.72) 0%, rgba(6, 17, 24, 0.12) 26%, rgba(6, 17, 24, 0) 46%),
    radial-gradient(70% 90% at 88% 8%, rgba(13, 122, 96, 0.34) 0%, rgba(6, 17, 24, 0) 62%);
}

.yc-slide-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(2rem, 4.5vw, 3.5rem) clamp(1.25rem, 4vw, 3.25rem) clamp(5rem, 9vw, 6.5rem);
}

.yc-slide-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: #9fe8cf;
}

.yc-slide-tag::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--accent-light);
}

.yc-slide h1,
.yc-slide h2 {
  max-width: 22em;
  margin-top: 1.1rem;
  color: #fff;
  font-size: clamp(1.85rem, calc(1.1rem + 3.1vw), 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.yc-slide-lead {
  max-width: 36em;
  margin-top: 1.15rem;
  color: rgba(232, 241, 242, 0.82);
  font-size: clamp(0.94rem, calc(0.9rem + 0.2vw), 1.05rem);
}

.yc-slide-lead strong {
  color: #fff;
  font-weight: 600;
}

.yc-slide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}

.yc-slider-controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3.25rem) clamp(1.1rem, 2.6vw, 1.6rem);
}

.yc-slider-dots {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.4rem);
}

.yc-slider-dot {
  position: relative;
  padding: 0.3rem 0.1rem 0.55rem;
  border: 0;
  background: none;
  color: rgba(232, 241, 242, 0.5);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: color 0.2s ease;
}

.yc-slider-dot::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.24);
}

.yc-slider-dot:hover {
  color: #fff;
}

.yc-slider-dot[aria-current="true"] {
  color: #fff;
}

.yc-slider-dot[aria-current="true"]::after {
  background: var(--accent-light);
}

.yc-slider-nav {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.yc-slider-arrow {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 50%;
  background: rgba(8, 22, 31, 0.35);
  color: #fff;
  font-family: inherit;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.yc-slider-arrow:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.6);
}

.yc-slider-pause {
  margin-right: 0.35rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(8, 22, 31, 0.35);
  color: rgba(232, 241, 242, 0.85);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.yc-slider-pause:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.yc-hero-facts-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 1.75rem);
}

.yc-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.78rem 1.5rem;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.yc-btn-primary {
  background: #0a7a5c;
  color: #fff;
  box-shadow: 0 14px 28px -16px rgba(10, 122, 92, 0.95);
}

.yc-btn-primary:hover {
  background: #086048;
  transform: translateY(-2px);
}

.yc-btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: #fff;
}

.yc-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.yc-hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-top: 2.4rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.yc-hero-facts dt {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: rgba(232, 241, 242, 0.55);
}

.yc-hero-facts dd {
  margin-top: 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

.yc-hero-facts dd a {
  color: var(--accent-light);
  text-decoration: none;
}

.yc-hero-facts dd a:hover {
  color: #fff;
}


/* ---------- capabilities ---------- */
.yc-capabilities {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.yc-capabilities ul {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1200px;
  margin: 0 auto;
}

.yc-capabilities li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.5rem clamp(1rem, 2.5vw, 1.75rem);
  border-left: 1px solid var(--line);
  transition: background-color 0.25s ease;
}

.yc-capabilities li:first-child {
  border-left: 0;
}

.yc-capabilities li:hover {
  background: #f1f7f3;
}

.yc-cap-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.yc-cap-name {
  font-size: clamp(1rem, calc(0.9rem + 0.3vw), 1.2rem);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink);
}

/* ---------- sections ---------- */
.yc-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(2.75rem, calc(1.6rem + 3.6vw), 4.75rem) 1.5rem;
}

.yc-sec-head {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.yc-sec-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.yc-sec-index {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.yc-sec-head h2,
.yc-about h2 {
  font-size: clamp(1.6rem, calc(1.1rem + 1.7vw), 2.4rem);
  max-width: 26em;
}

.yc-sec-lead {
  max-width: 46em;
  color: var(--muted);
}

.yc-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.yc-link span {
  transition: transform 0.2s ease;
}

.yc-link:hover span {
  transform: translateX(4px);
}

.yc-link:hover {
  color: #05553f;
}

/* ---------- products ---------- */
.yc-grid {
  display: grid;
  gap: clamp(0.85rem, 1.6vw, 1.35rem);
}

.yc-grid-products {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.yc-product {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.yc-product:hover {
  transform: translateY(-4px);
  border-color: rgba(10, 122, 92, 0.45);
  box-shadow: 0 26px 48px -32px rgba(8, 22, 31, 0.55);
}

.yc-product-media {
  position: relative;
  background: linear-gradient(150deg, #e8efe9 0%, #d9e5e0 100%);
}

.yc-product-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.85;
  mix-blend-mode: multiply;
}

.yc-product-badge {
  position: absolute;
  left: 0.85rem;
  top: 0.85rem;
  padding: 0.26rem 0.6rem;
  border-radius: 6px;
  background: rgba(8, 22, 31, 0.84);
  color: #eaf6f1;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
}

.yc-product-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 1.2rem 1.3rem;
}

.yc-product-body h3 {
  font-size: 1.02rem;
  line-height: 1.45;
}

.yc-product-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.yc-product-body .yc-link {
  margin-top: 0.2rem;
}

/* ---------- scenes ---------- */
.yc-grid-scenes {
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
}

.yc-scene {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.6rem;
  min-height: 128px;
  padding: 1.2rem 1.25rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  transition: background-color 0.28s ease, border-color 0.28s ease, transform 0.28s ease;
}

.yc-scene::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 104px;
  height: 104px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.09;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.yc-scene-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.yc-scene-name {
  position: relative;
  z-index: 1;
  font-size: clamp(1.02rem, calc(0.94rem + 0.3vw), 1.18rem);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.yc-scene:hover {
  background: var(--ink);
  border-color: var(--ink);
  transform: translateY(-3px);
}

.yc-scene:hover .yc-scene-name {
  color: #fff;
}

.yc-scene:hover .yc-scene-num {
  color: var(--accent-light);
}

.yc-scene:hover::after {
  opacity: 0.35;
  transform: scale(1.15);
}

/* ---------- about ---------- */
.yc-about {
  border-top: 1px solid var(--line);
}

.yc-about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: start;
  gap: clamp(1.75rem, 4vw, 3.5rem);
}

.yc-about h2 {
  margin-top: 0.75rem;
}

.yc-about-copy p:not(.yc-sec-index) {
  margin-top: 1.05rem;
  color: var(--muted);
  font-size: 0.98rem;
  text-align: justify;
}

.yc-about-copy .yc-link {
  margin-top: 1.5rem;
}

.yc-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.yc-stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.35rem;
  padding: clamp(1rem, 2vw, 1.5rem);
  background: var(--card);
}

.yc-stat dt {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.yc-stat dd {
  font-family: var(--mono);
  font-size: clamp(1.5rem, calc(1.1rem + 1.2vw), 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.yc-stat dd em {
  margin-left: 0.1em;
  font-style: normal;
  font-size: 0.52em;
  color: var(--accent);
}

/* ---------- news ---------- */
.yc-news {
  border-top: 1px solid var(--line);
}

.yc-news-list {
  border-top: 1px solid var(--line);
}

.yc-news-item {
  border-bottom: 1px solid var(--line);
}

.yc-news-item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: clamp(0.7rem, 2vw, 1.5rem);
  padding: 1.1rem 0.35rem;
  text-decoration: none;
  transition: background-color 0.2s ease, padding-left 0.2s ease;
}

.yc-news-item a:hover {
  background: #fff;
  padding-left: 0.85rem;
}

.yc-tag {
  padding: 0.22rem 0.62rem;
  border: 1px solid rgba(10, 122, 92, 0.35);
  border-radius: 999px;
  background: var(--accent-soft);
  color: #06604a;
  font-size: 0.74rem;
  white-space: nowrap;
}

.yc-news-title {
  color: var(--ink);
  font-size: 1rem;
  transition: color 0.2s ease;
}

.yc-news-item a:hover .yc-news-title {
  color: var(--accent);
}

.yc-news-date {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.yc-news-arrow {
  color: var(--accent);
  transition: transform 0.2s ease;
}

.yc-news-item a:hover .yc-news-arrow {
  transform: translateX(4px);
}

/* ---------- contact ---------- */
.yc-contact {
  position: relative;
  overflow: hidden;
  color: #e6f0f0;
  background-color: var(--ink);
  background-image:
    radial-gradient(90% 120% at 92% 10%, rgba(13, 122, 96, 0.42) 0%, rgba(8, 22, 31, 0) 60%),
    linear-gradient(180deg, #08161f 0%, #061118 100%);
}

.yc-contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3.75rem);
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(2.5rem, calc(1.5rem + 3.5vw), 4.5rem) 1.5rem;
}

.yc-contact .yc-sec-index {
  color: var(--accent-light);
}

.yc-contact h2 {
  margin-top: 0.75rem;
  color: #fff;
  font-size: clamp(1.45rem, calc(1.05rem + 1.4vw), 2.1rem);
  max-width: 24em;
}

.yc-contact-lead {
  max-width: 30em;
  margin-top: 0.9rem;
  color: rgba(230, 240, 240, 0.72);
  font-size: 0.95rem;
}

.yc-contact-phone-label {
  margin-top: 1.9rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: rgba(230, 240, 240, 0.55);
}

.yc-contact-phone {
  display: inline-block;
  margin-top: 0.35rem;
  padding-bottom: 0.15rem;
  border-bottom: 2px solid rgba(127, 233, 198, 0.5);
  color: #fff;
  font-family: var(--mono);
  font-size: clamp(1.7rem, calc(1.15rem + 2.2vw), 2.6rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.yc-contact-phone:hover {
  color: var(--accent-light);
  border-color: var(--accent-light);
}

.yc-addresses {
  display: grid;
  gap: 1.15rem;
  align-content: start;
}

.yc-addresses > div {
  padding-left: 1rem;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

.yc-addresses dt {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--accent-light);
}

.yc-addresses dd {
  margin-top: 0.25rem;
  color: rgba(230, 240, 240, 0.76);
  font-size: 0.88rem;
  line-height: 1.65;
}

/* ---------- footer ---------- */
.yc-footer {
  background: #050f15;
  color: #9fb3bb;
  font-size: 0.82rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.yc-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.yc-footer-name {
  color: #e6f0f0;
  font-size: 0.94rem;
  letter-spacing: 0.06em;
}

.yc-footer-copy {
  margin-top: 0.25rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.yc-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.yc-footer-nav a,
.yc-footer-icp {
  color: #9fb3bb;
  text-decoration: none;
}

.yc-footer-nav a:hover {
  color: #fff;
}

.yc-footer-icp {
  font-size: 0.78rem;
}

/* ---------- motion opt-in ---------- */
.yc-reveal-enabled .yc-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.yc-reveal-enabled .yc-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .yc-about-grid,
  .yc-contact-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .yc-capabilities ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .yc-capabilities li:nth-child(odd) {
    border-left: 0;
  }

  .yc-capabilities li:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 900px) {
  .yc-nav-toggle {
    display: inline-flex;
  }

  .yc-menu {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 0.35rem 1.5rem 1.25rem;
    border-bottom: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 24px 40px -30px rgba(8, 22, 31, 0.7);
  }

  .yc-menu.is-open {
    display: flex;
  }

  .yc-menu a {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.95rem;
  }

  .yc-menu a:not(.yc-nav-cta)::after {
    display: none;
  }

  .yc-menu .yc-nav-cta {
    margin-top: 0.85rem;
    text-align: center;
    border-bottom: 0;
  }
}

@media (max-width: 720px) {
  .yc-topbar-inner {
    padding: 0.45rem 1.1rem;
  }

  .yc-topbar-text {
    display: none;
  }

  .yc-topbar-links {
    justify-content: space-between;
    width: 100%;
  }

  .yc-nav {
    padding: 0.65rem 1.1rem;
  }

  .yc-section {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .yc-contact-inner {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .yc-slide-inner {
    padding-bottom: 6.75rem;
  }

  .yc-slide::after {
    background-image:
      linear-gradient(96deg, rgba(6, 17, 24, 0.95) 0%, rgba(6, 17, 24, 0.86) 52%, rgba(6, 17, 24, 0.5) 100%),
      linear-gradient(0deg, rgba(6, 17, 24, 0.82) 0%, rgba(6, 17, 24, 0.16) 30%, rgba(6, 17, 24, 0) 52%);
  }

  .yc-slide--crop-left .yc-slide-img {
    object-position: 18% 50%;
    transform: scale(1.02);
  }

  .yc-slide--crop-right .yc-slide-img {
    object-position: 82% 50%;
    transform: scale(1.02);
  }

  .yc-slider-controls {
    gap: 0.7rem 1rem;
  }

  .yc-slider-pause {
    font-size: 0.6rem;
    padding: 0.34rem 0.62rem;
  }

  .yc-news-item a {
    grid-template-columns: auto minmax(0, 1fr) auto;
    row-gap: 0.5rem;
  }

  .yc-news-title {
    grid-column: 1 / -1;
    order: 3;
    font-size: 0.96rem;
  }

  .yc-news-date {
    justify-self: end;
  }

  .yc-scene {
    min-height: 110px;
  }

  .yc-footer-inner {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
}

@media (max-width: 420px) {
  .yc-brand-text small {
    display: none;
  }

  .yc-slide-actions {
    gap: 0.6rem;
  }

  .yc-slide-inner {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .yc-slider-controls {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .yc-slider-arrow {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }

  .yc-slider-dots {
    gap: 0.7rem;
  }

  .yc-btn {
    flex: 1 1 auto;
    justify-content: center;
    padding: 0.7rem 1.1rem;
  }

  .yc-grid-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .yc-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .yc-scene {
    padding: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .yc-page *,
  .yc-page *::before,
  .yc-page *::after {
    transition-duration: 0.01ms !important;
  }

  .yc-reveal-enabled .yc-reveal {
    opacity: 1;
    transform: none;
  }
}