/* ============================================
   广通软件公司网站 - 全局样式
   清新淡蓝色系主题
   ============================================ */

:root {
  /* ---- 背景色 ---- */
  --bg-base: #F6FAFF;            /* Alice Blue 主背景（淡30%） */
  --bg-card: #FFFFFF;            /* 卡片白 */
  --bg-card-2: #F2F8FF;          /* 浅蓝卡片（淡30%） */
  --bg-card-hover: #EAF5FF;      /* 卡片悬停（淡30%） */
  --bg-section-alt: #FAFCFF;     /* 交替区块背景（淡30%） */

  /* ---- 边框 ---- */
  --border: rgba(14, 165, 233, 0.15);
  --border-hover: rgba(14, 165, 233, 0.4);
  --border-card: rgba(14, 165, 233, 0.12);

  /* ---- 文字色 ---- */
  --text-primary: #0F2744;       /* 深海蓝 主标题 */
  --text-secondary: #2D5986;     /* 中蓝 正文 */
  --text-muted: #6B96C4;         /* 浅蓝灰 辅助 */
  --text-on-dark: #FFFFFF;

  /* ---- 主色 ---- */
  --blue: #0EA5E9;               /* Sky 500 主蓝 */
  --blue-deep: #0369A1;          /* Sky 700 深蓝 */
  --blue-light: #38BDF8;         /* Sky 400 亮蓝 */
  --blue-dim: rgba(14, 165, 233, 0.10);
  --blue-dim-2: rgba(14, 165, 233, 0.06);

  /* ---- 品牌橙 (Logo原色) ---- */
  --orange: #F08300;
  --orange-light: #FB923C;
  --orange-dim: rgba(240, 131, 0, 0.10);
  --orange-gradient: linear-gradient(135deg, #F08300, #FB923C);

  /* ---- 辅助色 ---- */
  --purple: #818CF8;
  --purple-dim: rgba(129, 140, 248, 0.10);
  --green: #10B981;
  --green-dim: rgba(16, 185, 129, 0.10);
  --teal: #06B6D4;
  --teal-dim: rgba(6, 182, 212, 0.10);

  /* ---- 渐变 ---- */
  --gradient-main: linear-gradient(135deg, #0EA5E9 0%, #F08300 100%);
  --gradient-hero: linear-gradient(135deg, #0EA5E9 0%, #38BDF8 50%, #F08300 100%);
  --gradient-text: linear-gradient(90deg, #0EA5E9 0%, #38BDF8 50%, #F08300 100%);
  --gradient-bg: linear-gradient(180deg, #F6FAFF 0%, #EFF7FE 100%);
  --gradient-card: linear-gradient(135deg, rgba(14,165,233,0.06) 0%, rgba(240,131,0,0.04) 100%);

  /* ---- 阴影 ---- */
  --shadow-sm: 0 2px 8px rgba(14, 165, 233, 0.08);
  --shadow-md: 0 8px 24px rgba(14, 165, 233, 0.12);
  --shadow-lg: 0 20px 48px rgba(14, 165, 233, 0.16);
  --shadow-card: 0 4px 20px rgba(3, 105, 161, 0.08);

  /* ---- 字体 ---- */
  --font-cn: 'Noto Sans SC', sans-serif;
  --font-en: 'Outfit', sans-serif;

  /* ---- 布局 ---- */
  --nav-h: 72px;
  --radius-card: 20px;
  --transition: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-cn);
  font-size: 20px;
  line-height: 1.85;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }

/* ===== UTILITIES ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 120px 0; position: relative; overflow: hidden; }

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue-deep);
  background: var(--blue-dim);
  border: 1px solid rgba(14, 165, 233, 0.25);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-cn);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-sub {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 580px;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-header .section-sub {
  margin: 0 auto;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.15);
  opacity: 0;
  transition: var(--transition);
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(14, 165, 233, 0.4); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary.w-full { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 17px;
  font-weight: 500;
  padding: 14px 28px;
  border-radius: 12px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--blue-deep);
  background: var(--blue-dim);
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up.in-view, .reveal-right.in-view {
  opacity: 1;
  transform: none;
}

.delay-1 { transition-delay: 0.1s !important; }
.delay-2 { transition-delay: 0.2s !important; }
.delay-3 { transition-delay: 0.3s !important; }
.delay-4 { transition-delay: 0.4s !important; }

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(240, 248, 255, 0.94);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-cn {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.logo-en {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 600;
  color: var(--blue-deep);
  letter-spacing: 0.2em;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  font-size: 17.5px;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  transition: var(--transition);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--blue-deep);
  background: var(--blue-dim);
}

.nav-links .nav-cta {
  background: var(--gradient-main);
  color: #fff;
  padding: 8px 20px;
  box-shadow: 0 2px 12px rgba(14, 165, 233, 0.25);
}

.nav-links .nav-cta:hover {
  background: var(--gradient-main);
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
}

.nav-links .nav-highlight {
  color: hsl(var(--hl, 200), 85%, 35%) !important;
  font-weight: 600;
}

.nav-mobile-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-mobile-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(240, 248, 255, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  z-index: 99;
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu ul {
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  font-size: 17px;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}

.mobile-menu a:hover {
  color: var(--blue-deep);
  background: var(--blue-dim);
}

/* ===== HERO ===== */
.hero {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 120px 0 80px;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  overflow: hidden;
}

/* Hero 大背景光晕 */
section#hero,
.hero {
  background: transparent;
}

/* 整个 Hero 所在的 body 顶部增加浅蓝渐变装饰 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 100vh;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(14, 165, 233, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 90%, rgba(240, 131, 0, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

#particleCanvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 500;
  color: var(--blue-deep);
  background: var(--blue-dim);
  border: 1px solid rgba(14, 165, 233, 0.3);
  padding: 7px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background: var(--blue);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(38px, 5.5vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.title-line { display: block; }

.hero-sub {
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}

.tag {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(14, 165, 233, 0.06);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 100px;
  transition: var(--transition);
}

.tag:hover {
  border-color: var(--border-hover);
  color: var(--blue-deep);
  background: var(--blue-dim);
}

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

/* ===== HERO VISUAL ===== */
.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.globe-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.globe {
  width: 280px;
  height: 280px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.globe-core {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, #38BDF8, #0369A1);
  box-shadow: 0 0 40px rgba(14, 165, 233, 0.4), 0 0 80px rgba(14, 165, 233, 0.15);
  z-index: 3;
}

.globe-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  animation: spin-ring linear infinite;
}

.ring-1 {
  width: 130px; height: 130px;
  border-color: rgba(14, 165, 233, 0.4);
  animation-duration: 8s;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.08);
}

.ring-2 {
  width: 200px; height: 200px;
  border-color: rgba(14, 165, 233, 0.2);
  border-style: dashed;
  animation-duration: 15s;
  animation-direction: reverse;
}

.ring-3 {
  width: 270px; height: 270px;
  border-color: rgba(240, 131, 0, 0.15);
  animation-duration: 25s;
}

@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.drone {
  position: absolute;
  z-index: 5;
  animation: orbit linear infinite;
  transform-origin: 0 0;
}

.drone-1 {
  animation-duration: 6s;
  top: 50%; left: 50%;
  margin-left: -65px;
  margin-top: -70px;
  animation-name: orbit1;
}

.drone-2 {
  animation-duration: 10s;
  top: 50%; left: 50%;
  margin-left: -105px;
  margin-top: -10px;
  animation-name: orbit2;
}

@keyframes orbit1 {
  0% { transform: rotate(0deg) translateX(65px) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(65px) rotate(-360deg); }
}

@keyframes orbit2 {
  0% { transform: rotate(180deg) translateX(100px) rotate(-180deg); }
  100% { transform: rotate(540deg) translateX(100px) rotate(-540deg); }
}

.signal-lines {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.signal-line {
  position: absolute;
  top: 50%; left: 50%;
  width: 2px;
  height: 60px;
  transform-origin: bottom center;
  background: linear-gradient(to top, var(--blue), transparent);
  opacity: 0;
  animation: signal-pulse 3s ease-in-out infinite;
}

.sl-1 { transform: translateX(-1px) translateY(-100%) rotate(0deg); animation-delay: 0s; }
.sl-2 { transform: translateX(-1px) translateY(-100%) rotate(120deg); animation-delay: 1s; }
.sl-3 { transform: translateX(-1px) translateY(-100%) rotate(240deg); animation-delay: 2s; }

@keyframes signal-pulse {
  0%, 100% { opacity: 0; height: 40px; }
  50% { opacity: 0.5; height: 70px; }
}

.stat-cards {
  display: flex;
  gap: 12px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  min-width: 90px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.sc-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 8px;
}

.sc-num {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.sc-num span {
  font-size: 20px;
  color: var(--orange);
}

.sc-label {
  font-size: 17px;
  color: var(--text-muted);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 17px;
  animation: float-hint 3s ease-in-out infinite;
}

.scroll-wheel {
  width: 22px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: 11px;
  position: relative;
}

.scroll-wheel::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--blue);
  border-radius: 2px;
  animation: scroll-indicator 1.5s ease-in-out infinite;
}

@keyframes scroll-indicator {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

@keyframes float-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* ===== ABOUT ===== */
.about {
  background: var(--bg-section-alt);
  position: relative;
}

.about::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-desc {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 17px;
  line-height: 1.8;
}

.about-desc strong { color: var(--blue-deep); font-weight: 600; }

.about-pillars {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.pillar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border-card);
  background: var(--bg-card);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.pillar:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.pillar-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pillar-icon.blue { background: var(--blue-dim); color: var(--blue); }
.pillar-icon.orange { background: var(--orange-dim); color: var(--orange); }
.pillar-icon.purple { background: var(--purple-dim); color: var(--purple); }
.pillar-icon.teal { background: var(--teal-dim); color: var(--teal); }

.pillar-name { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.pillar-sub { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.about-visual {
  position: relative;
}

.av-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.av-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.av-dot { width: 8px; height: 8px; border-radius: 50%; }
.av-dot.blue { background: var(--blue); box-shadow: 0 0 8px rgba(14, 165, 233, 0.4); }

.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.arch-layer {
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.layer-app { background: rgba(129, 140, 248, 0.08); border: 1px solid rgba(129, 140, 248, 0.2); }
.layer-platform { background: rgba(14, 165, 233, 0.08); border: 1px solid rgba(14, 165, 233, 0.2); }
.layer-os { background: rgba(240, 131, 0, 0.08); border: 1px solid rgba(240, 131, 0, 0.2); }
.layer-infra { background: rgba(16, 185, 129, 0.08); border: 1px solid rgba(16, 185, 129, 0.2); }

.layer-label {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 52px;
  letter-spacing: 0.05em;
}

.layer-items {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}

.layer-item {
  font-size: 17px;
  padding: 3px 10px;
  border-radius: 6px;
  background: rgba(14, 165, 233, 0.06);
  color: var(--text-secondary);
  font-weight: 500;
}

.arch-arrow {
  text-align: center;
  color: var(--blue);
  font-size: 17px;
  opacity: 0.4;
  padding: 2px 0;
}

/* ===== PRODUCTS ===== */
.products {
  background: var(--bg-base);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* 产品分层标题 */
.product-tier-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 24px 0 4px;
  padding-top: 20px;
}
.product-tier-header:first-child { margin-top: 0; padding-top: 0; }

.tier-num {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: 100px;
  white-space: nowrap;
}
.tier-num.tier-1 { color: var(--blue); background: var(--blue-dim); border: 1px solid rgba(14,165,233,0.2); }
.tier-num.tier-2 { color: var(--orange); background: var(--orange-dim); border: 1px solid rgba(240,131,0,0.2); }
.tier-num.tier-3 { color: var(--teal); background: var(--teal-dim); border: 1px solid rgba(6,182,212,0.2); }

.tier-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.tier-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
}

/* 产品分类标题 */
.product-cat-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 40px 0 20px;
}
.product-cat-header:first-of-type { margin-top: 0; }

.cat-badge {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 8px 24px;
  border-radius: 100px;
  white-space: nowrap;
}
.cat-badge.cat-sky {
  color: var(--blue-deep);
  background: linear-gradient(135deg, rgba(14,165,233,0.12), rgba(56,189,248,0.08));
  border: 1px solid rgba(14,165,233,0.25);
}
.cat-badge.cat-industrial {
  color: #0F766E;
  background: linear-gradient(135deg, rgba(6,182,212,0.12), rgba(20,184,166,0.08));
  border: 1px solid rgba(6,182,212,0.25);
}

.cat-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
  border-radius: 1px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.product-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.pc-wide {
  grid-column: span 2;
}

.pc-accent {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.pc-accent.blue { background: linear-gradient(90deg, var(--blue), transparent); }
.pc-accent.orange { background: linear-gradient(90deg, var(--orange), transparent); }
.pc-accent.purple { background: linear-gradient(90deg, var(--purple), transparent); }
.pc-accent.green { background: linear-gradient(90deg, var(--green), transparent); }

.pc-num {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.pc-icon {
  margin-bottom: 16px;
}

.pc-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.4;
}

.pc-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 22px;
}

.pc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pc-tags span {
  font-size: 17px;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(14, 165, 233, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}

.product-card:hover .pc-tags span {
  border-color: var(--border-hover);
  color: var(--blue-deep);
}

/* Product card brand badge */
.pc-brand {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--blue-deep);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-block;
  padding: 2px 10px;
  background: var(--blue-dim);
  border-radius: 4px;
  border: 1px solid rgba(14, 165, 233, 0.25);
}

.pc-title small {
  display: block;
  font-size: 17px;
  font-weight: 500;
  color: var(--blue);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

/* Product card metrics */
.pc-metrics {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  margin-bottom: 16px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pcm-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.pcm-val {
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pcm-lbl {
  font-size: 17px;
  color: var(--text-muted);
  margin-top: 2px;
  letter-spacing: 0.05em;
}

/* ===== GTMQTT5 产品详情 ===== */
.gtmqtt-detail {
  position: relative;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: 120px;
  background: var(--bg-section-alt);
}

.gtmqtt-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 20%, rgba(14, 165, 233, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(240, 131, 0, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.gtmqtt-intro {
  max-width: 800px;
  margin: 0 auto 64px;
  text-align: center;
}

.gtmqtt-intro p {
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.gtmqtt-intro strong {
  color: var(--text-primary);
  font-weight: 600;
}

.gtmqtt-capabilities {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gtmqtt-cap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 32px 36px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.gtmqtt-cap:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.gtmqtt-cap-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.gtmqtt-cap-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.gtmqtt-cap-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.gtmqtt-cap-icon.blue { background: var(--blue-dim); color: var(--blue); }
.gtmqtt-cap-icon.green { background: var(--green-dim); color: var(--green); }
.gtmqtt-cap-icon.orange { background: var(--orange-dim); color: var(--orange); }
.gtmqtt-cap-icon.purple { background: var(--purple-dim); color: var(--purple); }

.gtmqtt-cap-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.gtmqtt-cap-items.four-col {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.gtmqtt-cap-item {
  padding: 0;
}

.gtmqtt-cap-item h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  margin-top: 8px;
}

.gtmqtt-cap-item p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.gci-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--blue-dim-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  text-transform: uppercase;
}

.gci-tag.blue { background: var(--blue-dim); border-color: rgba(14,165,233,0.25); color: var(--blue-deep); }
.gci-tag.green { background: var(--green-dim); border-color: rgba(16,185,129,0.25); color: var(--green); }
.gci-tag.orange { background: var(--orange-dim); border-color: rgba(240,131,0,0.25); color: var(--orange); }
.gci-tag.purple { background: var(--purple-dim); border-color: rgba(129,140,248,0.25); color: var(--purple); }
.gci-tag.teal { background: var(--teal-dim); border-color: rgba(6,182,212,0.25); color: #0891B2; }

/* ===== CM3D-CAD 产品详情 ===== */
.cm3d-detail {
  position: relative;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: 120px;
  background: linear-gradient(180deg, #FCFEFF 0%, #F6FAFF 100%);
}

.cm3d-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 20%, rgba(6, 182, 212, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(129, 140, 248, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.cm3d-intro {
  max-width: 800px;
  margin: 0 auto 64px;
  text-align: center;
}

.cm3d-intro p {
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.cm3d-intro strong {
  color: var(--text-primary);
  font-weight: 600;
}

.cm3d-capabilities {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cm3d-cap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 32px 36px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.cm3d-cap:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.cm3d-cap-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.cm3d-cap-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.cm3d-cap-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cm3d-cap-icon.teal { background: var(--teal-dim); color: var(--teal); }
.cm3d-cap-icon.blue { background: var(--blue-dim); color: var(--blue); }
.cm3d-cap-icon.green { background: var(--green-dim); color: var(--green); }
.cm3d-cap-icon.orange { background: var(--orange-dim); color: var(--orange); }
.cm3d-cap-icon.purple { background: var(--purple-dim); color: var(--purple); }

.cm3d-cap-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.cm3d-cap-items.four-col {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.cm3d-cap-item {
  padding: 0;
}

.cm3d-cap-item h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  margin-top: 8px;
}

.cm3d-cap-item p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* CM3D metrics */
.cm3d-metrics-val {
  background: linear-gradient(135deg, var(--teal), var(--purple));
}

/* CM3D file format table */
.cm3d-formats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.cm3d-fmt {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-card-2);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  font-size: 17px;
  color: var(--text-secondary);
}

.cm3d-fmt-icon {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-dim);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

/* PC accent teal */
.pc-accent.teal { background: linear-gradient(180deg, var(--teal), #0891B2); }

@media (max-width: 768px) {
  .gtmqtt-cap { padding: 24px 20px; }
  .gtmqtt-cap-items { grid-template-columns: 1fr; }
  .cm3d-cap { padding: 24px 20px; }
  .cm3d-cap-items { grid-template-columns: 1fr; }
  .pc-metrics { gap: 12px; }
  .pcm-val { font-size: 17px; }
}

/* ===== SOLUTIONS ===== */
.solutions {
  background: var(--bg-base);
  position: relative;
}

.solutions::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(14, 165, 233, 0.05), transparent);
  pointer-events: none;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.sol-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.sol-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(14, 165, 233, 0.06), transparent 70%);
  pointer-events: none;
}

.sol-featured::before {
  background: radial-gradient(circle at 50% 0%, rgba(240, 131, 0, 0.08), transparent 70%);
}

.sol-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.sol-featured {
  border-color: rgba(240, 131, 0, 0.22);
  background: linear-gradient(135deg, #FFFAF5 0%, #FFF8EE 100%);
}

.sol-featured-blue {
  border-color: rgba(14, 165, 233, 0.25);
  background: linear-gradient(135deg, #F6FAFF 0%, #F2F8FF 100%);
}

.sol-featured-teal {
  border-color: rgba(6, 182, 212, 0.22);
  background: linear-gradient(135deg, #F0FDFF 0%, #ECFEFF 100%);
}

.sol-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}

.sol-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blue-glow { background: var(--blue-dim); box-shadow: 0 0 20px rgba(14,165,233,0.12); }
.orange-glow { background: var(--orange-dim); box-shadow: 0 0 20px rgba(240,131,0,0.15); }
.purple-glow { background: var(--purple-dim); box-shadow: 0 0 20px rgba(129,140,248,0.12); }
.teal-glow { background: var(--teal-dim); box-shadow: 0 0 20px rgba(6,182,212,0.12); }

.sol-badge {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-deep);
  background: var(--blue-dim);
  border: 1px solid rgba(14,165,233,0.2);
  padding: 4px 12px;
  border-radius: 100px;
}

.sol-badge.orange { color: var(--orange); background: var(--orange-dim); border-color: rgba(240,131,0,0.2); }
.sol-badge.purple { color: var(--purple); background: var(--purple-dim); border-color: rgba(129,140,248,0.2); }
.sol-badge.teal { color: var(--teal); background: var(--teal-dim); border-color: rgba(6,182,212,0.2); }

.sol-card h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.sol-card p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 26px;
}

.sol-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sol-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  color: var(--text-secondary);
}

.sol-features li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--blue);
  border-radius: 50%;
  flex-shrink: 0;
}

.sol-featured .sol-features li::before { background: var(--orange); }

/* ===== ECOSYSTEM ===== */
.ecosystem {
  background: var(--bg-section-alt);
  position: relative;
}

.eco-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 50%, rgba(14, 165, 233, 0.05), transparent);
  pointer-events: none;
}

.eco-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-bottom: 20px;
}

.eco-flow-v {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-bottom: 60px;
}

.eco-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.eco-node-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.eco-node-icon:hover {
  border-color: var(--border-hover);
  color: var(--blue);
  background: var(--blue-dim);
  box-shadow: var(--shadow-md);
}

.node-gov .eco-node-icon { color: var(--blue); }
.node-ops .eco-node-icon { color: var(--orange); }
.node-mfg .eco-node-icon { color: var(--green); }
.node-user .eco-node-icon { color: var(--purple); }

.eco-node span {
  font-size: 17px;
  color: var(--text-secondary);
  font-weight: 500;
}

.eco-arrow {
  font-size: 20px;
  color: var(--text-muted);
  opacity: 0.5;
}

.v-arrow { transform: rotate(90deg); }

.eco-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.eco-center-inner {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid rgba(14, 165, 233, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 0 40px rgba(14, 165, 233, 0.12);
  animation: pulse-center 3s ease-in-out infinite;
}

@keyframes pulse-center {
  0%, 100% { box-shadow: 0 0 40px rgba(14, 165, 233, 0.12); }
  50% { box-shadow: 0 0 60px rgba(14, 165, 233, 0.22); }
}

.eco-center-text { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.eco-center-sub { font-size: 13px; color: var(--text-muted); }

.eco-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.eco-stat {
  flex: 1;
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
}

.eco-stat:hover { background: var(--bg-card-hover); }

.eco-divider {
  width: 1px;
  height: 60px;
  background: var(--border);
  flex-shrink: 0;
}

.es-num {
  font-family: var(--font-en);
  font-size: 40px;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1;
}

.es-label {
  font-size: 17px;
  color: var(--text-muted);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--bg-base);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-desc {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ci-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.ci-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--blue-dim);
  border: 1px solid rgba(14, 165, 233, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--blue);
}

.ci-label { font-size: 13px; color: var(--text-muted); margin-bottom: 3px; }
.ci-value { font-size: 15px; color: var(--text-primary); font-weight: 500; }

.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
}

.required { color: var(--orange); }

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-section-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 17px;
  color: var(--text-primary);
  font-family: var(--font-cn);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 7L11 1' stroke='%232D5986' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
}

.form-group select option { background: #fff; color: var(--text-primary); }

.form-group textarea { resize: vertical; min-height: 100px; }

.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 200px;
  text-align: center;
  color: var(--green);
  font-size: 17px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--text-primary);     /* 深海蓝 底部 */
  border-top: 1px solid rgba(14, 165, 233, 0.2);
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  margin-bottom: 48px;
}

.footer-tagline {
  font-size: 17px;
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  margin-top: 16px;
}
.footer-domain {
  font-size: 17px;
  margin-top: 10px;
  color: rgba(255,255,255,0.45);
}
.footer-domain a {
  color: var(--blue-light);
  text-decoration: none;
  transition: opacity .2s;
}
.footer-domain a:hover { opacity: .75; }

.footer-links-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.footer-col-title {
  font-size: 17px;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 17px;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-col a:hover { color: var(--blue-light); }

.footer-mail-link {
  color: rgba(255,255,255,0.35) !important;
  font-size: 13px !important;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 17px;
  color: rgba(255,255,255,0.4);
}

/* Logo 在深色页脚中显示白色 */
.footer .logo-cn { color: rgba(255,255,255,0.9); }
.footer .logo-en { color: var(--blue-light); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    min-height: auto;
    padding-top: 140px;
    padding-bottom: 60px;
  }

  .hero-sub { margin: 0 auto 28px; }
  .hero-tags { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }
  .hero-scroll-hint { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { display: none; }

  .products-grid { grid-template-columns: 1fr 1fr; }
  .pc-wide { grid-column: span 2; }

  .solutions-grid { grid-template-columns: 1fr; gap: 20px; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-links-group { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }

  .section { padding: 72px 0; }

  .nav-links { display: none; }
  .nav-mobile-btn { display: flex; }

  .products-grid { grid-template-columns: 1fr; }
  .pc-wide { grid-column: span 1; }

  .eco-flow, .eco-flow-v { gap: 16px; }

  .eco-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .eco-divider { display: none; }

  .form-row { grid-template-columns: 1fr; }

  .footer-links-group { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .solutions-grid { grid-template-columns: 1fr; }

  .contact-form-wrap { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .footer-links-group { grid-template-columns: 1fr; }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: rgba(14, 165, 233, 0.25); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(14, 165, 233, 0.45); }

/* ===== SELECTION ===== */
::selection { background: rgba(14, 165, 233, 0.2); color: var(--text-primary); }

/* ===== PREFERS REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .reveal-up, .reveal-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * { animation-duration: 0.01ms !important; }
}