/* ============================================================
   yttaichang.com — 炫酷科技 + 环保 主题 (静态站版)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-dark: #050d1a;
  --bg-deep: #081424;
  --bg-card: rgba(15, 30, 50, 0.50);

  --eco-green: #00ffaa;
  --eco-cyan:  #00d4ff;
  --eco-blue:  #0099ff;
  --eco-grad:  linear-gradient(135deg, #00ffaa 0%, #00d4ff 50%, #0099ff 100%);

  --text-light: #e8f4ff;
  --text-dim:   #8aa5c7;
  --text-muted: #5a7799;
  --on-accent:  #050d1a;

  --border-soft: rgba(0, 255, 170, 0.15);
  --border-mid:  rgba(0, 255, 170, 0.30);
  --border-strong: rgba(0, 255, 170, 0.60);

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 20px;
  --r-pill: 30px;

  --font-body: "Inter","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --header-h: 80px;
  --container: 1400px;
  --transition: 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
}

@media (min-width: 1025px) and (hover: hover) {
  body.cursor-neon, body.cursor-neon * { cursor: none; }
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }
::selection { background: var(--eco-green); color: var(--on-accent); }

h1, h2, h3, h4 {
  color: var(--text-light);
  font-weight: 800;
  line-height: 1.2;
  margin: 0;
}
p { margin: 0 0 1em; color: var(--text-dim); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 5%;
  position: relative;
}

.gradient-text {
  background: var(--eco-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
  display: inline-block;
}
@keyframes gradientShift {
  0%,100% { background-position: 0% 50%; }
  50%     { background-position: 100% 50%; }
}

section { padding: 100px 0; position: relative; }
.section--alt { background: var(--bg-deep); }
.section-head { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0,255,170,0.10);
  border: 1px solid var(--border-mid);
  border-radius: var(--r-pill);
  font-size: 0.78rem;
  color: var(--eco-green);
  margin-bottom: 18px;
  letter-spacing: 2px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.section-title { font-size: clamp(1.85rem, 3.6vw, 2.9rem); font-weight: 800; margin-bottom: 14px; }
.section-desc { color: var(--text-dim); font-size: 1rem; max-width: 700px; margin: 0 auto; line-height: 1.8; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border-radius: var(--r-pill);
  font-size: 0.98rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  font-family: inherit;
  position: relative; overflow: hidden;
}
.btn--primary {
  background: var(--eco-grad);
  color: var(--on-accent);
  box-shadow: 0 4px 30px rgba(0,255,170,0.35);
}
.btn--primary::before {
  content: ''; position: absolute;
  top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.6s;
}
.btn--primary:hover::before { left: 100%; }
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(0,255,170,0.65);
}
.btn--secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text-light);
  border: 1px solid var(--border-mid);
  backdrop-filter: blur(10px);
}
.btn--secondary:hover {
  background: rgba(0,255,170,0.10);
  border-color: var(--eco-green);
  transform: translateY(-3px);
}

/* ===== Glass ===== */
.glass {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

:focus-visible { outline: 2px solid var(--eco-green); outline-offset: 3px; border-radius: 4px; }

/* ===== Background layers ===== */
.bg-glow {
  position: fixed;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.30;
  z-index: -1;
  pointer-events: none;
  animation: floatGlow 22s ease-in-out infinite;
}
.bg-glow--1 { background: var(--eco-green); top: 10%; left: -10%; }
.bg-glow--2 { background: var(--eco-blue);  bottom: 10%; right: -10%; animation-delay: -10s; }
@keyframes floatGlow {
  0%,100% { transform: translate(0,0); }
  50%     { transform: translate(120px,-120px); }
}
.particle-canvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: -2; pointer-events: none;
}

/* ===== Fade-in on scroll ===== */
.fade-in { opacity: 0; transform: translateY(40px); transition: opacity 0.8s, transform 0.8s; }
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

/* ===== Eyebrow ===== */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: rgba(0,255,170,0.10);
  border: 1px solid var(--border-mid);
  border-radius: var(--r-pill);
  font-size: 0.82rem;
  color: var(--eco-green);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}
.eyebrow__dot {
  width: 8px; height: 8px;
  background: var(--eco-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--eco-green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: 0.5; transform: scale(1.3); }
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  padding: 0 5%;
  display: flex; align-items: center;
  background: rgba(5,13,26,0.30);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,255,170,0.10);
  transition: padding 0.3s ease, background 0.3s ease, border-color 0.3s ease, height 0.3s ease;
}
.site-header.is-scrolled {
  height: 64px;
  background: rgba(5,13,26,0.85);
  border-bottom: 1px solid var(--border-mid);
}
.site-header__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 12px; font-size: 1.2rem; font-weight: 700; letter-spacing: 1px; }
.logo__mark { width: 40px; height: 40px; display: grid; place-items: center; filter: drop-shadow(0 0 10px rgba(0,255,170,0.5)); }
.logo__text { font-size: 1.15rem; }
.nav { display: flex; gap: 32px; list-style: none; margin: 0; padding: 0; }
.nav a {
  position: relative;
  color: var(--text-light);
  font-size: 0.92rem;
  padding: 6px 0;
  transition: color 0.3s;
}
.nav a::after {
  content: ''; position: absolute;
  left: 0; right: 0; bottom: -6px; height: 2px;
  background: var(--eco-grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s ease;
}
.nav a:hover, .nav a.is-active { color: var(--eco-green); }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); }

.site-header__tools { display: flex; align-items: center; gap: 14px; }
.nav-cta { padding: 10px 22px; font-size: 0.88rem; }

.menu-toggle {
  display: none;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: 10px;
  flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; cursor: pointer;
}
.menu-toggle span {
  display: block; width: 18px; height: 2px;
  background: var(--text-light); border-radius: 1px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1024px) {
  .nav-cta { display: none; }
  .nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(5,13,26,0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-mid);
    padding: 12px 5%;
    transform: translateY(-200%); opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    z-index: 49;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; }
  .nav a { padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav a::after { display: none; }
  .menu-toggle { display: flex; }
}

/* ===== Footer ===== */
.site-footer {
  background: #030810;
  color: var(--text-dim);
  padding: 70px 5% 28px;
  border-top: 1px solid rgba(0,255,170,0.10);
}
.site-footer__grid {
  max-width: var(--container);
  margin: 0 auto 50px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
}
.footer-brand__title { font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
.footer-brand__partners { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.footer-brand__partners span {
  padding: 4px 12px;
  background: rgba(0,255,170,0.08);
  border: 1px solid var(--border-soft);
  border-radius: 30px;
  color: var(--eco-green);
  font-size: 0.74rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}
.footer-col h4 {
  color: var(--eco-green);
  font-size: 0.9rem;
  margin-bottom: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-col a { color: var(--text-dim); font-size: 0.9rem; transition: color 0.3s; }
.footer-col a:hover { color: var(--eco-green); }
.footer-contact li { font-size: 0.88rem; line-height: 1.6; }
.site-footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(0,255,170,0.10);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.site-footer__bottom a { color: var(--text-muted); transition: color 0.3s; }
.site-footer__bottom a:hover { color: var(--eco-green); }
@media (max-width: 1024px) { .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; } }
@media (max-width: 640px) {
  .site-footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ===== Page wrapper ===== */
.page { padding-top: var(--header-h); min-height: calc(100vh - var(--header-h)); }
.page-hero { text-align: center; padding: 80px 0 50px; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin: 18px 0 14px; font-weight: 900; }
.page-hero p { color: var(--text-dim); max-width: 700px; margin: 0 auto; line-height: 1.85; }

/* ============ HOME: Hero ============ */
.hero {
  min-height: calc(100vh - var(--header-h));
  display: flex; align-items: center;
  position: relative; padding: 80px 0; overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 60px; align-items: center;
}
.hero__title {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  font-weight: 900; line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 26px 0 22px;
}
.hero__sub {
  font-size: 1.05rem; color: var(--text-dim);
  line-height: 1.85; margin-bottom: 36px; max-width: 540px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }
.hero__visual { display: grid; place-items: center; }

@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero__sub { margin-left: auto; margin-right: auto; }
  .hero__cta { justify-content: center; }
}

/* ============ Rotating Orb ============ */
.hero-orb { position: relative; width: clamp(260px, 36vw, 400px); aspect-ratio: 1; }
.hero-orb__ring {
  position: absolute; inset: 0;
  border: 2px solid transparent; border-radius: 50%;
  border-top-color: var(--eco-green);
  border-right-color: var(--eco-cyan);
  animation: orbSpin 8s linear infinite;
}
.hero-orb__ring:nth-child(2) {
  inset: 8%;
  border-top-color: var(--eco-cyan);
  border-left-color: var(--eco-green);
  animation: orbSpin 6s linear infinite reverse;
}
.hero-orb__ring:nth-child(3) {
  inset: 16%;
  border-bottom-color: var(--eco-green);
  border-left-color: var(--eco-blue);
  animation: orbSpin 11s linear infinite;
}
@keyframes orbSpin { to { transform: rotate(360deg); } }
.hero-orb__core {
  position: absolute; inset: 24%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--eco-green), var(--eco-cyan), var(--eco-blue));
  display: grid; place-items: center;
  box-shadow: 0 0 80px rgba(0,255,170,0.6), inset 0 0 60px rgba(255,255,255,0.2);
  animation: orbPulse 4s ease-in-out infinite;
}
@keyframes orbPulse {
  0%,100% { box-shadow: 0 0 80px rgba(0,255,170,0.55), inset 0 0 60px rgba(255,255,255,0.20); }
  50%     { box-shadow: 0 0 120px rgba(0,255,170,0.90), inset 0 0 80px rgba(255,255,255,0.30); }
}
.hero-orb__core svg {
  width: 50%; height: 50%;
  filter: drop-shadow(0 0 18px white);
  animation: orbFloat 3s ease-in-out infinite;
}
@keyframes orbFloat {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-8px); }
}
.hero-orb__icon {
  position: absolute;
  width: 56px; height: 56px;
  background: rgba(15,30,50,0.65);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-mid);
  border-radius: 14px;
  display: grid; place-items: center;
  box-shadow: 0 8px 32px rgba(0,255,170,0.20);
  animation: iconFloat 4s ease-in-out infinite;
}
.hero-orb__icon--1 { top: 5%;  right: 8%;  animation-delay: 0s; }
.hero-orb__icon--2 { top: 30%; left: -6%;  animation-delay: -1s; }
.hero-orb__icon--3 { bottom: 25%; right: -6%; animation-delay: -2s; }
.hero-orb__icon--4 { bottom: 5%;  left: 12%; animation-delay: -3s; }
@keyframes iconFloat {
  0%,100% { transform: translateY(0) rotate(0); }
  50%     { transform: translateY(-12px) rotate(4deg); }
}

/* ============ Wave divider ============ */
.wave-divider { width: 100%; height: 90px; line-height: 0; margin-top: -90px; pointer-events: none; }
.wave-divider svg { width: 100%; height: 100%; display: block; }

/* ============ Stats ============ */
.stats { padding: 80px 0; }
.stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.stats__cell { text-align: center; padding: 36px 18px; border-radius: var(--r-lg); }
.stats__num {
  font-weight: 900; letter-spacing: -0.02em;
  display: inline-flex; align-items: baseline;
}
.stats__num span:first-child { font-size: clamp(2.4rem, 4vw, 3.2rem); }
.stats__num span:last-child  { font-size: clamp(1.6rem, 2.6vw, 2rem); margin-left: 2px; }
.stats__label {
  margin-top: 8px;
  color: var(--text-dim);
  font-size: 0.92rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
@media (max-width: 760px) { .stats__grid { grid-template-columns: repeat(2, 1fr); } }

/* ============ 100% custom ============ */
.custom__layout {
  display: grid; grid-template-columns: 1fr 1.25fr; gap: 64px; align-items: center;
}
.custom__list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.custom__card {
  padding: 24px;
  border-radius: var(--r-md);
  position: relative;
  transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
}
.custom__card:hover {
  transform: translateY(-6px);
  border-color: var(--eco-green);
  box-shadow: 0 12px 36px rgba(0,255,170,0.20);
}
.custom__num {
  font-family: var(--font-mono);
  font-size: 0.82rem; color: var(--eco-green);
  letter-spacing: 0.1em; margin-bottom: 12px;
}
.custom__card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.custom__card p  { font-size: 0.88rem; line-height: 1.65; margin: 0; }
@media (max-width: 980px) {
  .custom__layout { grid-template-columns: 1fr; gap: 48px; }
  .custom__list { grid-template-columns: 1fr; }
}

/* ============ Hex grid ============ */
.hex-grid {
  position: relative;
  width: 100%; height: 500px;
  max-width: 480px; margin: 0 auto;
}
.hex-cell {
  position: absolute;
  width: 130px; height: 150px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-mid);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px;
  color: var(--text-light);
  transition: transform 0.4s, background 0.4s, box-shadow 0.4s;
}
.hex-cell svg { width: 36px; height: 36px; color: var(--eco-green); }
.hex-cell span { font-size: 0.86rem; font-weight: 500; }
.hex-cell:hover {
  background: linear-gradient(135deg, rgba(0,255,170,0.20), rgba(0,153,255,0.20));
  border-color: var(--eco-green);
  transform: scale(1.10);
  box-shadow: 0 0 40px rgba(0,255,170,0.45);
  z-index: 2;
}
.hex-cell:nth-child(1) { top: 20px;  left: 50%; transform: translateX(-50%); }
.hex-cell:nth-child(2) { top: 130px; left: 8%; }
.hex-cell:nth-child(3) { top: 130px; right: 8%; }
.hex-cell:nth-child(4) { top: 240px; left: 50%; transform: translateX(-50%); }
.hex-cell:nth-child(5) { top: 350px; left: 8%; }
.hex-cell:nth-child(6) { top: 350px; right: 8%; }
.hex-cell:nth-child(1):hover, .hex-cell:nth-child(4):hover { transform: translateX(-50%) scale(1.10); }
@media (max-width: 640px) {
  .hex-grid { height: 420px; max-width: 360px; }
  .hex-cell { width: 110px; height: 128px; }
  .hex-cell span { font-size: 0.78rem; }
  .hex-cell:nth-child(1) { top: 14px; }
  .hex-cell:nth-child(2), .hex-cell:nth-child(3) { top: 110px; }
  .hex-cell:nth-child(4) { top: 206px; }
  .hex-cell:nth-child(5), .hex-cell:nth-child(6) { top: 302px; }
}

/* ============ Product card ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 980px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .product-grid { grid-template-columns: 1fr; } }

.product-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1), border-color 0.4s, box-shadow 0.4s;
}
.product-card:hover {
  transform: translateY(-12px);
  border-color: var(--eco-green);
  box-shadow: 0 20px 60px rgba(0,255,170,0.25);
}
.product-card__image {
  position: relative;
  width: 100%; aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #0a1828, #061224);
  overflow: hidden;
}
.product-card__image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
  filter: saturate(0.85) hue-rotate(140deg) brightness(0.92) contrast(1.05);
}
.product-card:hover .product-card__image img {
  transform: scale(1.10);
  filter: saturate(1.0) hue-rotate(150deg) brightness(1.0) contrast(1.05);
}
.product-card__image::after {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, transparent 50%, rgba(5,13,26,0.85) 100%),
    linear-gradient(135deg, rgba(0,255,170,0.10), rgba(0,153,255,0.18));
  background-blend-mode: normal, multiply;
  pointer-events: none;
}
.product-card__badge {
  position: absolute;
  top: 14px; left: 14px;
  padding: 5px 12px;
  background: rgba(0,255,170,0.92);
  color: var(--on-accent);
  border-radius: var(--r-pill);
  font-size: 0.72rem; font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  z-index: 2;
}
.product-card__body {
  padding: 22px 24px 24px;
  display: flex; flex-direction: column; gap: 8px; flex: 1;
}
.product-card__title {
  font-size: 1.1rem; font-weight: 700;
  color: var(--text-light); line-height: 1.35;
}
.product-card__summary {
  color: var(--text-dim);
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 4px 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card__link {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: auto;
  color: var(--eco-green);
  font-family: var(--font-mono);
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.05em;
  transition: gap 0.3s;
}
.product-card:hover .product-card__link { gap: 14px; }

/* ============ Product chips ============ */
.chips {
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: center; margin-bottom: 50px;
}
.chip {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-pill);
  padding: 10px 22px;
  font-size: 0.9rem; font-family: inherit;
  color: var(--text-light); cursor: pointer;
  transition: background 0.3s, color 0.3s, transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  font-weight: 500;
}
.chip:hover { border-color: var(--eco-green); color: var(--eco-green); }
.chip.is-active {
  background: var(--eco-grad);
  color: var(--on-accent);
  border-color: transparent;
  box-shadow: 0 6px 24px rgba(0,255,170,0.40);
  font-weight: 700;
}

/* ============ Cases ============ */
.cases__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.case-card {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
}
.case-card:hover {
  transform: translateY(-8px);
  border-color: var(--eco-green);
  box-shadow: 0 18px 48px rgba(0,255,170,0.20);
}
.case-card__img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.case-card__img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
  filter: saturate(0.85) hue-rotate(140deg) brightness(0.9);
}
.case-card:hover .case-card__img img { transform: scale(1.08); }
.case-card__img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,13,26,0.85) 100%);
  pointer-events: none;
}
.case-card__tag {
  position: absolute; top: 16px; left: 16px;
  padding: 5px 12px;
  background: var(--eco-grad);
  color: var(--on-accent);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.04em; z-index: 2;
}
.case-card__body { padding: 22px 24px 26px; }
.case-card__body h3 { font-size: 1.08rem; margin: 0 0 8px; color: var(--text-light); }
.case-card__body p { color: var(--text-dim); font-size: 0.88rem; margin: 0; line-height: 1.6; }
@media (max-width: 760px) { .cases__grid { grid-template-columns: 1fr; } }

/* ============ News ============ */
.news__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card {
  padding: 28px 26px;
  border-radius: var(--r-md);
  display: flex; flex-direction: column; gap: 12px;
  transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
}
.news-card:hover {
  transform: translateY(-6px);
  border-color: var(--eco-green);
  box-shadow: 0 12px 36px rgba(0,255,170,0.18);
}
.news-card__meta {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem; letter-spacing: 0.04em;
}
.news-card__cat {
  padding: 3px 10px;
  background: rgba(0,255,170,0.10);
  border: 1px solid var(--border-mid);
  border-radius: var(--r-pill);
  color: var(--eco-green);
}
.news-card__date { color: var(--text-muted); }
.news-card h3 { font-size: 1rem; line-height: 1.4; }
.news-card p {
  color: var(--text-dim); font-size: 0.86rem; margin: 0; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card__more {
  align-self: flex-end;
  color: var(--eco-green);
  font-size: 1.2rem;
  transition: transform 0.3s;
}
.news-card:hover .news-card__more { transform: translateX(6px); }
@media (max-width: 980px) { .news__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .news__grid { grid-template-columns: 1fr; } }

/* ============ Partners ============ */
.partners__row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.partner-chip {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: var(--r-pill);
}
.partner-chip__name { font-weight: 700; font-size: 1rem; letter-spacing: 0.06em; }
.partner-chip__country { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); }

/* ============ CTA ============ */
.cta { padding: 80px 0 100px; }
.cta__box {
  text-align: center;
  padding: 60px 36px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border-mid);
  background: linear-gradient(135deg, rgba(0,255,170,0.08), rgba(0,153,255,0.10));
}
.cta__box h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 12px; }
.cta__box p { color: var(--text-dim); margin: 0 0 28px; }
.cta__buttons { display: inline-flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ============ About ============ */
.about-grid__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
}
.about-card { padding: 36px 32px; border-radius: var(--r-lg); }
.about-card h3 {
  color: var(--eco-green);
  font-size: 1.1rem; margin: 0 0 16px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.about-card p { color: var(--text-dim); line-height: 1.8; margin: 0; }
.about-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.about-card li {
  display: flex; align-items: center; gap: 10px;
  color: var(--text-light); font-size: 0.94rem;
}
.about-card li svg { color: var(--eco-green); flex-shrink: 0; }
@media (max-width: 880px) { .about-grid__inner { grid-template-columns: 1fr; } }

/* ============ Contact ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 30px;
  align-items: start;
}
.contact-info { display: grid; gap: 16px; }
.info-card {
  padding: 22px 26px;
  border-radius: var(--r-md);
  display: flex; flex-direction: column; gap: 6px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.info-card:hover {
  transform: translateY(-3px);
  border-color: var(--eco-green);
  box-shadow: 0 10px 28px rgba(0,255,170,0.20);
}
.info-card__label {
  font-family: var(--font-mono);
  font-size: 0.74rem; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.info-card__value { font-size: 1.05rem; font-weight: 600; color: var(--text-light); }
.contact-form { padding: 36px 32px; border-radius: var(--r-lg); }
.contact-form h3 {
  margin: 0 0 24px;
  font-size: 1.2rem;
  color: var(--eco-green);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.field { display: block; margin-bottom: 18px; }
.field span {
  display: block; font-size: 0.82rem; color: var(--text-dim);
  margin-bottom: 6px; font-family: var(--font-mono); letter-spacing: 0.04em;
}
.field input, .field textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(5,13,26,0.5);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-sm);
  color: var(--text-light);
  font-family: inherit; font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--eco-green);
  box-shadow: 0 0 0 3px rgba(0,255,170,0.18);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-muted); }
.form-success {
  margin: 18px 0 0;
  padding: 12px 16px;
  background: rgba(0,255,170,0.10);
  border: 1px solid var(--border-mid);
  border-radius: var(--r-sm);
  color: var(--eco-green);
  font-size: 0.9rem;
}
.form-error { margin: 18px 0 0; color: #ff6b8a; font-size: 0.9rem; }
@media (max-width: 980px) { .contact-grid { grid-template-columns: 1fr; } }

/* ============ Detail page ============ */
.detail__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px; align-items: start;
}
.detail__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #0a1828, #061224);
  border: 1px solid var(--border-soft);
  aspect-ratio: 4/3;
}
.detail__media img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(0.9) hue-rotate(140deg) brightness(0.95);
}
.detail__badge {
  position: absolute; top: 20px; left: 20px;
  padding: 6px 14px;
  background: var(--eco-grad);
  color: var(--on-accent);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.04em;
}
.detail__back {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--eco-green);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.detail__title { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 900; margin: 0 0 18px; }
.detail__summary { color: var(--text-dim); font-size: 1rem; line-height: 1.85; margin-bottom: 32px; }
.detail__h3 {
  font-size: 1.05rem; margin: 0 0 14px;
  color: var(--eco-green);
  font-family: var(--font-mono);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.detail__highlights {
  list-style: none; padding: 0; margin: 0 0 36px;
  display: grid; gap: 12px;
}
.detail__highlights li {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: rgba(0,255,170,0.06);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-sm);
  color: var(--text-light);
  font-size: 0.94rem;
}
.detail__highlights svg { color: var(--eco-green); flex-shrink: 0; }
.detail__cta { display: flex; flex-wrap: wrap; gap: 14px; }
@media (max-width: 980px) { .detail__inner { grid-template-columns: 1fr; gap: 36px; } }

/* ============ Floating contact (FAB) ============ */
.floating-contact {
  position: fixed;
  bottom: 28px; right: 28px;
  z-index: 999;
  display: flex; flex-direction: column; gap: 12px;
}
.fc-btn {
  width: 54px; height: 54px;
  border-radius: 50%;
  background: var(--eco-grad);
  display: grid; place-items: center;
  border: none; color: var(--on-accent);
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,255,170,0.40);
  transition: transform 0.3s, box-shadow 0.3s, opacity 0.3s;
}
.fc-btn:hover { transform: scale(1.10); box-shadow: 0 6px 30px rgba(0,255,170,0.70); }
.fc-btn.is-hidden { opacity: 0; pointer-events: none; }
@media (max-width: 640px) {
  .floating-contact { bottom: 18px; right: 18px; }
  .fc-btn { width: 48px; height: 48px; }
}

/* ============ Lang switcher ============ */
.lang-switcher {
  display: inline-flex;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-pill);
  overflow: hidden;
  background: rgba(255,255,255,0.04);
}
.lang-switcher button {
  border: 0; background: transparent;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-dim); cursor: pointer;
  transition: all 0.3s;
}
.lang-switcher button:hover { color: var(--eco-green); }
.lang-switcher button.is-active {
  background: var(--eco-grad);
  color: var(--on-accent);
  font-weight: 600;
}

/* ============ Neon cursor ============ */
.neon-cursor {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 10000;
  will-change: transform;
  transform: translate3d(-100px, -100px, 0);
}
.neon-cursor--ring {
  width: 24px; height: 24px;
  border: 2px solid var(--eco-green);
  border-radius: 50%;
  transition: width 0.2s ease, height 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.neon-cursor--ring.is-hover {
  width: 44px; height: 44px;
  border-color: var(--eco-cyan);
  background: rgba(0,212,255,0.10);
}
.neon-cursor--dot {
  width: 6px; height: 6px;
  background: var(--eco-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--eco-cyan);
  z-index: 10001;
}
@media (max-width: 1024px), (hover: none) { .neon-cursor { display: none; } }
@media (prefers-reduced-motion: reduce) { .neon-cursor { display: none; } }

/* ============ Click ripple ============ */
.ripple {
  position: fixed;
  width: 12px; height: 12px;
  margin-left: -6px; margin-top: -6px;
  border-radius: 50%;
  background: var(--eco-green);
  pointer-events: none;
  z-index: 9999;
  opacity: 0.7;
  animation: rippleOut 0.7s ease-out forwards;
  mix-blend-mode: screen;
}
@keyframes rippleOut { to { transform: scale(20); opacity: 0; } }