/* ============================================================
   慧农未来科技 — 企业官网样式
   ============================================================ */

:root {
  --c-primary-900: #083344;
  --c-primary-800: #0E4C5E;
  --c-primary-700: #0E7490;
  --c-primary-500: #06B6D4;
  --c-primary-300: #67E8F9;
  --c-primary-50:  #ECFEFF;

  --c-accent-700: #047857;
  --c-accent-500: #10B981;
  --c-accent-300: #6EE7B7;
  --c-accent-50:  #ECFDF5;

  --c-bg:          #FFFFFF;
  --c-bg-soft:     #F8FAFC;
  --c-bg-section:  #F1F5F9;
  --c-text:        #0F172A;
  --c-text-muted:  #475569;
  --c-text-faint:  #94A3B8;
  --c-border:      #E2E8F0;

  --c-success: #22C55E;
  --c-danger:  #EF4444;

  --grad-hero: linear-gradient(135deg, #083344 0%, #0E7490 55%, #10B981 100%);
  --grad-text: linear-gradient(90deg, #06B6D4 0%, #10B981 100%);
  --grad-card: linear-gradient(160deg, #ECFEFF 0%, #ECFDF5 100%);

  --shadow-sm:  0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md:  0 4px 12px rgba(14, 116, 144, 0.08);
  --shadow-lg:  0 20px 40px -12px rgba(14, 116, 144, 0.18);

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  24px;
  --radius-pill: 999px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --container-max: 1200px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC",
               "Helvetica Neue", Arial, sans-serif;

  --fs-hero:  clamp(2.5rem, 5.5vw + 1rem, 4.5rem);
  --fs-h2:    clamp(1.75rem, 2.5vw + 1rem, 2.5rem);
  --fs-h3:    clamp(1.15rem, 1vw + 0.9rem, 1.5rem);
  --fs-body:  1rem;
  --fs-sm:    0.875rem;
  --fs-xs:    0.75rem;

  --lh-tight:   1.2;
  --lh-base:    1.65;
  --lh-relaxed: 1.8;

  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:  180ms;
  --dur-base:  320ms;
  --dur-slow:  600ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-base);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- 工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #fff;
  color: var(--c-primary-700);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

:focus-visible {
  outline: 2px solid var(--c-primary-500);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--fs-body);
  transition: all var(--dur-base) var(--ease);
  white-space: nowrap;
  line-height: 1;
}
.btn-primary {
  background: var(--c-primary-700);
  color: #fff;
  box-shadow: 0 6px 18px -4px rgba(14, 116, 144, 0.5);
}
.btn-primary:hover {
  background: var(--c-primary-800);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -4px rgba(14, 116, 144, 0.55);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--c-primary-700);
  border: 1.5px solid var(--c-border);
}
.btn-outline:hover {
  border-color: var(--c-primary-500);
  color: var(--c-primary-700);
  background: var(--c-primary-50);
}

/* ---------- 通用 Section ---------- */
.section {
  padding-block: clamp(4rem, 8vw, 6rem);
}
.section-soft {
  position: relative;
  background:
    radial-gradient(ellipse 50% 40% at 10% 10%, rgba(103, 232, 249, 0.08), transparent 70%),
    radial-gradient(ellipse 45% 35% at 95% 90%, rgba(16, 185, 129, 0.07), transparent 70%),
    linear-gradient(180deg, #F4FBFD 0%, #F0F8F5 100%);
  overflow: hidden;
}
.section-soft > .container { position: relative; z-index: 1; }
.section-dark {
  background: var(--grad-hero);
  color: #F1F5F9;
}
.section-dark .section-title,
.section-dark .eyebrow { color: #fff; }

.section-head {
  text-align: center;
  margin-bottom: var(--space-16);
  max-width: 720px;
  margin-inline: auto;
}
.eyebrow {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: var(--c-primary-50);
  color: var(--c-primary-700);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}
.section-dark .eyebrow {
  background: rgba(255, 255, 255, 0.12);
  color: var(--c-accent-300);
}
.section-title {
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  color: var(--c-text);
  margin-bottom: var(--space-4);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-lede {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  line-height: var(--lh-relaxed);
}
.section-dark .section-lede { color: #CBD5E1; }

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

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: background var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease),
              backdrop-filter var(--dur-base) var(--ease);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  box-shadow: 0 1px 0 rgba(14, 116, 144, 0.08), 0 8px 24px -16px rgba(15, 23, 42, 0.2);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  transition: color var(--dur-base) var(--ease);
}
.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px -4px rgba(14, 116, 144, 0.5);
}
.brand-logo img { width: 32px; height: 32px; object-fit: contain; display: block; }
.brand-name { line-height: 1; font-size: 1.4rem; font-weight: 800; letter-spacing: 0.04em; }
.site-header.scrolled .brand { color: var(--c-text); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-menu a {
  position: relative;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0;
  transition: color var(--dur-base) var(--ease);
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--c-primary-500);
  transform: translateX(-50%);
  transition: width var(--dur-base) var(--ease);
  border-radius: 2px;
}
.nav-menu a:hover,
.nav-menu a.is-active { color: #fff; }
.nav-menu a.is-active::after { width: 100%; }
.site-header.scrolled .nav-menu a { color: var(--c-text-muted); }
.site-header.scrolled .nav-menu a:hover,
.site-header.scrolled .nav-menu a.is-active { color: var(--c-primary-700); }

.nav-cta {
  padding: 0.55rem 1.1rem !important;
  background: var(--c-accent-500);
  color: #fff !important;
  border-radius: var(--radius-pill);
  font-weight: 600 !important;
  transition: all var(--dur-base) var(--ease);
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  background: var(--c-accent-700);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -4px rgba(16, 185, 129, 0.5);
}
.site-header.scrolled .nav-cta { color: #fff !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--dur-base) var(--ease);
}
.site-header.scrolled .nav-toggle span { background: var(--c-text); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--grad-hero);
  color: #fff;
  overflow: hidden;
  padding-top: 120px;
  padding-bottom: 120px;
  display: flex;
  align-items: center;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(circle, rgba(103, 232, 249, 0.25) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-waves {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  pointer-events: none;
  z-index: 1;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(16, 185, 129, 0.18);
  color: var(--c-accent-300);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: var(--space-6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero-eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent-500);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.25);
  animation: dotPulse 2s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.25); }
  50% { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0.05); }
}
.hero-title {
  font-size: var(--fs-hero);
  line-height: var(--lh-tight);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}
.hero-title .gradient-text {
  background: linear-gradient(90deg, #67E8F9 0%, #6EE7B7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lede {
  font-size: 1.15rem;
  line-height: var(--lh-relaxed);
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-bottom: var(--space-8);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}
.hero-stats {
  display: flex;
  gap: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 560px;
  flex-wrap: wrap;
}
.hero-stat .num {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  display: block;
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.hero-stat .num .u { font-size: 1.1rem; color: var(--c-accent-300); margin-left: 2px; }
.hero-stat .lbl {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.65);
}

/* Hero 右侧视觉：无人船俯视 + 雷达 */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin-left: auto;
}
.hero-visual-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(103, 232, 249, 0.3);
}
.hero-visual-ring.r2 { inset: 10%; border-color: rgba(103, 232, 249, 0.22); }
.hero-visual-ring.r3 { inset: 22%; border-color: rgba(103, 232, 249, 0.14); }
.hero-visual-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--c-primary-300);
  opacity: 0;
  animation: radarPulse 3.2s cubic-bezier(0.2, 0.7, 0.3, 1) infinite;
}
.hero-visual-pulse.d2 { animation-delay: 1.1s; }
.hero-visual-pulse.d3 { animation-delay: 2.2s; }
@keyframes radarPulse {
  0% { transform: scale(0.4); opacity: 0.75; }
  100% { transform: scale(1.1); opacity: 0; }
}
.hero-visual-boat {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 42%;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 10px 24px rgba(6, 182, 212, 0.4));
}
.hero-visual-boat svg { width: 100%; height: auto; }
.hero-visual-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-accent-500);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.8);
}
.hero-visual-dot.p1 { top: 25%; left: 30%; animation: floatY 4s ease-in-out infinite; }
.hero-visual-dot.p2 { top: 68%; left: 72%; animation: floatY 5s ease-in-out -1s infinite; }
.hero-visual-dot.p3 { top: 72%; left: 22%; animation: floatY 4.5s ease-in-out -2s infinite; }
.hero-visual-dot.p4 { top: 20%; left: 72%; animation: floatY 5.5s ease-in-out -0.5s infinite; }
@keyframes floatY {
  0%, 100% { transform: translateY(0); opacity: 0.9; }
  50% { transform: translateY(-8px); opacity: 1; }
}

/* ---------- About ---------- */
#about {
  position: relative;
  background:
    radial-gradient(ellipse 50% 40% at 10% 20%, rgba(103, 232, 249, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 35% at 95% 95%, rgba(16, 185, 129, 0.08), transparent 70%),
    linear-gradient(180deg, #FFFFFF 0%, #F6FDFF 50%, #FFFFFF 100%);
  overflow: hidden;
}
#about::before {
  content: "";
  position: absolute;
  top: -140px;
  left: -140px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103, 232, 249, 0.35), transparent 68%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}
#about::after {
  content: "";
  position: absolute;
  bottom: -160px;
  right: -120px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.30), transparent 65%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}
#about .container { position: relative; z-index: 1; }

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}
.about-eyebrow { margin-bottom: var(--space-4); }
.about-title {
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-6);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.about-body p {
  color: var(--c-text-muted);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-4);
  font-size: 1.02rem;
}
.about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--c-primary-50);
  color: var(--c-primary-700);
  border: 1px solid rgba(14, 116, 144, 0.15);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 600;
}
.chip svg { width: 16px; height: 16px; }
.about-visual {
  position: relative;
  aspect-ratio: 5 / 4;
  background: linear-gradient(135deg, var(--c-primary-50) 0%, var(--c-accent-50) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.about-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 116, 144, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 116, 144, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at center, #000 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 40%, transparent 80%);
}
.about-visual svg { position: relative; z-index: 1; width: 85%; height: auto; }

/* ---------- Advantages ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}
.advantage-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  transition: all var(--dur-base) var(--ease);
  overflow: hidden;
}
.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease);
}
.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.advantage-card:hover::before { transform: scaleX(1); }
.advantage-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--c-primary-50);
  color: var(--c-primary-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  transition: all var(--dur-base) var(--ease);
}
.advantage-icon svg { width: 28px; height: 28px; }
.advantage-card:hover .advantage-icon {
  background: var(--c-primary-700);
  color: #fff;
  transform: rotate(-6deg) scale(1.05);
}
.advantage-title {
  font-size: var(--fs-h3);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: var(--lh-tight);
}
.advantage-desc {
  color: var(--c-text-muted);
  font-size: 0.95rem;
  line-height: var(--lh-relaxed);
}

/* ---------- Scenarios ---------- */
.scenario-list {
  display: grid;
  gap: var(--space-8);
}
.scenario-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(var(--space-6), 3vw, var(--space-12));
  align-items: center;
  padding: clamp(var(--space-8), 3.5vw, var(--space-12));
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: all var(--dur-base) var(--ease);
}
.scenario-card:nth-child(even) { grid-template-columns: 1.1fr 0.9fr; }
.scenario-card:nth-child(even) .scenario-visual { order: 2; }
.scenario-card:hover {
  border-color: var(--c-primary-500);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.scenario-visual {
  aspect-ratio: 4 / 3;
  background: var(--grad-card);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.scenario-visual svg { width: 80%; height: auto; position: relative; z-index: 1; }
.scenario-tag {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: var(--c-accent-50);
  color: var(--c-accent-700);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
}
.scenario-title {
  font-size: clamp(1.4rem, 2vw + 0.5rem, 1.9rem);
  font-weight: 700;
  margin-bottom: var(--space-4);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
}
.scenario-desc {
  color: var(--c-text-muted);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-6);
}
.scenario-points {
  display: grid;
  gap: var(--space-3);
}
.scenario-points li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  color: var(--c-text);
  font-size: 0.95rem;
}
.scenario-points li::before {
  content: "";
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  background: var(--c-accent-500);
  mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  mask-size: contain;
  -webkit-mask-size: contain;
  mask-repeat: no-repeat;
  -webkit-mask-repeat: no-repeat;
}

/* ---------- 产品和服务 Supergroup ---------- */
#scenarios {
  position: relative;
  background:
    radial-gradient(ellipse 55% 35% at 85% 15%, rgba(103, 232, 249, 0.12), transparent 70%),
    radial-gradient(ellipse 50% 35% at 10% 55%, rgba(16, 185, 129, 0.09), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 85%, rgba(6, 182, 212, 0.08), transparent 70%),
    linear-gradient(180deg, #F6FEFF 0%, #F3FBF6 50%, #F6FEFF 100%);
  overflow: hidden;
}
#scenarios::before {
  content: "";
  position: absolute;
  top: 6%;
  right: -180px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103, 232, 249, 0.42), transparent 65%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}
#scenarios::after {
  content: "";
  position: absolute;
  bottom: 8%;
  left: -200px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.34), transparent 65%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}
#scenarios > .container { position: relative; z-index: 1; }

.ps-subgroup { margin-top: clamp(5rem, 7vw, 7.5rem); }
.ps-subgroup:first-of-type { margin-top: 0; }
.ps-subhead {
  text-align: center;
  margin-bottom: var(--space-12);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.eyebrow-sm {
  font-size: var(--fs-xs);
  padding: 0.25rem 0.75rem;
  margin-bottom: 0;
}
.ps-subtitle {
  font-size: clamp(1.3rem, 1.6vw + 0.7rem, 1.75rem);
  font-weight: 700;
  color: var(--c-text);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
}
.advantage-grid.grid-2 { grid-template-columns: repeat(2, 1fr); }
.advantage-grid.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* 浅底下的 stats 变体：覆盖深色章节的高亮渐变与浅色标签 */
.ps-subgroup .stat-value {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}
.ps-subgroup .stat-label {
  color: var(--c-text-muted);
}

/* ---------- 数据成果 面板背景 ---------- */
.ps-subgroup--stats {
  position: relative;
  padding: clamp(2.5rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 3rem);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 60% 50% at 15% 10%, rgba(103, 232, 249, 0.18), transparent 65%),
    radial-gradient(ellipse 55% 45% at 85% 90%, rgba(16, 185, 129, 0.16), transparent 65%),
    linear-gradient(160deg, #FFFFFF 0%, #F6FEFE 100%);
  border: 1px solid rgba(14, 116, 144, 0.1);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.8) inset,
    0 24px 60px -30px rgba(14, 116, 144, 0.28);
  overflow: hidden;
}
.ps-subgroup--stats::before,
.ps-subgroup--stats::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}
.ps-subgroup--stats::before {
  top: -120px;
  left: -80px;
  background: var(--c-primary-300);
}
.ps-subgroup--stats::after {
  bottom: -120px;
  right: -80px;
  background: var(--c-accent-300);
}
.ps-subgroup--stats > * { position: relative; z-index: 1; }
.ps-subgroup--stats .stat-item {
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.7);
}
.ps-subgroup--stats .stat-item:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(6, 182, 212, 0.25);
  box-shadow: 0 14px 32px -16px rgba(14, 116, 144, 0.28);
}
.ps-subgroup--stats .stat-row + .stat-row {
  border-top-color: rgba(16, 185, 129, 0.28);
}

/* ---------- Stats (shared) ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}
.stat-item { padding: var(--space-4); }
.stat-value {
  font-size: clamp(2.25rem, 3.4vw + 0.8rem, 3.25rem);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(90deg, #67E8F9 0%, #6EE7B7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
  display: block;
}
.stat-label {
  color: #CBD5E1;
  font-size: var(--fs-sm);
  letter-spacing: 0.03em;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-12);
  align-items: stretch;
}
.contact-info {
  background: linear-gradient(160deg, var(--c-primary-900) 0%, var(--c-primary-700) 100%);
  color: #fff;
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.contact-info::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.contact-info-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}
.contact-info-lede {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: var(--space-8);
  line-height: var(--lh-relaxed);
  position: relative;
  z-index: 1;
}
.contact-list {
  display: grid;
  gap: var(--space-6);
  position: relative;
  z-index: 1;
  flex: 1;
  align-content: center;
}
.contact-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary-300);
  flex-shrink: 0;
}
.contact-item-icon svg { width: 20px; height: 20px; }
.contact-item-label {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2px;
}
.contact-item-value {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 500;
}

.contact-form {
  background: #fff;
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-md);
}
.form-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.form-lede {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  margin-bottom: var(--space-8);
  line-height: var(--lh-relaxed);
}
.form-grid {
  display: grid;
  gap: var(--space-5);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-field label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
}
.form-field label .req { color: var(--c-danger); margin-left: 2px; }
.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.7rem 0.9rem;
  background: var(--c-bg-soft);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1.05rem;
  color: var(--c-text);
  transition: all var(--dur-base) var(--ease);
  width: 100%;
}
.form-field textarea { resize: vertical; min-height: 100px; }
.form-field select { cursor: pointer; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  background: #fff;
  border-color: var(--c-primary-500);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
  outline: none;
}
.form-submit {
  background: var(--c-primary-700);
  color: #fff;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-size: 1.05rem;
  font-weight: 600;
  transition: all var(--dur-base) var(--ease);
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--space-2);
}
.form-submit:hover {
  background: var(--c-primary-800);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -4px rgba(14, 116, 144, 0.5);
}
.form-status {
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  display: none;
}
.form-status.is-success {
  display: block;
  background: var(--c-accent-50);
  color: var(--c-accent-700);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0B1F28;
  color: #94A3B8;
  padding-top: var(--space-16);
  padding-bottom: var(--space-6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}
.footer-brand .brand {
  color: #fff;
  margin-bottom: var(--space-4);
}
.footer-brand p {
  color: #94A3B8;
  font-size: 0.95rem;
  line-height: var(--lh-relaxed);
  max-width: 300px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}
.footer-col ul { display: grid; gap: 0.6rem; }
.footer-col a {
  color: #94A3B8;
  font-size: 0.92rem;
  transition: color var(--dur-fast) var(--ease);
}
.footer-col a:hover { color: var(--c-primary-300); }
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--fs-sm);
  color: #64748B;
}

/* ---------- 数据成果 两行布局 ---------- */
.stat-row { position: relative; }
.stat-row + .stat-row {
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px dashed rgba(16, 185, 129, 0.22);
}
.eyebrow-mini {
  display: block;
  text-align: center;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-primary-700);
  margin-bottom: var(--space-6);
}
.stat-row--model .eyebrow-mini { color: var(--c-accent-700); }
.stat-row--model .stat-grid { grid-template-columns: repeat(2, 1fr); }

/* stat tile 微交互 */
.stat-item {
  padding: var(--space-5) var(--space-4);
  border-radius: var(--radius-md);
  transition: transform var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease),
              background var(--dur-base) var(--ease);
}
.ps-subgroup .stat-item:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 24px -12px rgba(14, 116, 144, 0.2);
}

/* ---------- 核心优势 icon 呼吸 + 卡片柔光 ---------- */
.advantage-icon {
  animation: iconBreathe 5.4s ease-in-out infinite;
  transform-origin: center;
}
.advantage-card:hover .advantage-icon { animation: none; }
.advantage-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle at 50% 0%,
    rgba(6, 182, 212, 0.14),
    transparent 70%);
  transition: opacity var(--dur-base) var(--ease);
  border-radius: inherit;
}
.advantage-card:hover::after { opacity: 1; }

/* ---------- Primary 按钮流光 ---------- */
.btn-primary { position: relative; overflow: hidden; isolation: isolate; }
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg,
    transparent 20%,
    rgba(255, 255, 255, 0.38) 50%,
    transparent 80%);
  transform: translateX(-120%);
  pointer-events: none;
  z-index: -1;
}
.btn-primary:hover::after { animation: btnShimmer 1.1s ease; }

/* ---------- 场景卡片：ghost 大字 + hover 渐变边框 ---------- */
.scenario-body { position: relative; }
.scenario-body::before {
  content: attr(data-num);
  position: absolute;
  top: -42px;
  right: -4px;
  font-size: clamp(5rem, 9vw, 8rem);
  font-weight: 900;
  color: var(--c-primary-700);
  opacity: 0.055;
  letter-spacing: -0.04em;
  line-height: 1;
  pointer-events: none;
  z-index: 0;
  font-family: var(--font-sans);
}
.scenario-body > * { position: relative; z-index: 1; }
.scenario-card:hover {
  box-shadow:
    0 24px 48px -16px rgba(6, 182, 212, 0.24),
    0 0 0 1px rgba(6, 182, 212, 0.25);
}

/* ---------- SVG 微动效 ---------- */
.hero-visual-boat {
  animation: boatBob 4.4s ease-in-out infinite;
  transform-origin: center;
  will-change: transform;
}
.hero-waves path:nth-child(1) { animation: waveDrift 16s ease-in-out infinite; }
.hero-waves path:nth-child(2) { animation: waveDrift 20s ease-in-out -4s infinite reverse; }
.hero-waves path:nth-child(3) { animation: waveDrift 24s ease-in-out -8s infinite; }

.about-bubble {
  transform-box: fill-box;
  transform-origin: center;
  animation: bubbleRise 3.6s ease-in-out infinite;
}
.about-bubble.ab-2 { animation-duration: 4.4s; animation-delay: -0.8s; }
.about-bubble.ab-3 { animation-duration: 3.2s; animation-delay: -1.6s; }
.about-bubble.ab-4 { animation-duration: 4.8s; animation-delay: -2.4s; }
.about-ring {
  transform-box: fill-box;
  transform-origin: center;
  animation: ringPulse 2.6s ease-in-out infinite;
}
.about-ring.ar-d2 { animation-delay: -0.6s; }
.about-ring.ar-d3 { animation-delay: -1.2s; }
.about-ring.ar-d4 { animation-delay: -1.8s; }

/* 投喂场景 */
.feed-zone { animation: feedZonePulse 3.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.feed-fish {
  transform-box: fill-box;
  transform-origin: center;
  animation: fishDrift 6s ease-in-out infinite;
}
.feed-fish.ff-2 { animation-duration: 7s; animation-delay: -1.4s; }
.feed-fish.ff-3 { animation-duration: 5.4s; animation-delay: -2.6s; animation-direction: reverse; }
.feed-fish.ff-4 { animation-duration: 6.6s; animation-delay: -3.2s; }
.feed-pellet {
  transform-box: fill-box;
  transform-origin: center;
  animation: pelletDrop 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
.feed-pellet.fp-2 { animation-duration: 2.8s; animation-delay: -0.6s; }
.feed-pellet.fp-3 { animation-duration: 2.2s; animation-delay: -1.2s; }
.feed-pellet.fp-4 { animation-duration: 3s;   animation-delay: -1.8s; }
.feed-pellet.fp-5 { animation-duration: 2.6s; animation-delay: -0.3s; }
.feed-pellet.fp-6 { animation-duration: 2.4s; animation-delay: -1.5s; }

/* 水质场景 */
.probe-ring {
  transform-box: fill-box;
  transform-origin: center;
  animation: ringPulse 2.4s ease-in-out infinite;
}
.probe-ring.pr-2 { animation-delay: -0.6s; }
.probe-ring.pr-3 { animation-delay: -1.2s; }
.probe-ring.pr-4 { animation-delay: -1.8s; }
.monitor-bubble {
  transform-box: fill-box;
  transform-origin: center;
  animation: bubbleRise 3.6s ease-in-out infinite;
}
.monitor-bubble.mb-2 { animation-duration: 2.8s; animation-delay: -0.8s; }
.monitor-bubble.mb-3 { animation-duration: 4s;   animation-delay: -1.5s; }
.monitor-bubble.mb-4 { animation-duration: 3.2s; animation-delay: -2.3s; }

/* 巡检场景 */
.patrol-path {
  stroke-dasharray: 8 6;
  animation: patrolDraw 7s linear infinite;
}
.patrol-ping {
  transform-box: fill-box;
  transform-origin: center;
  animation: ringPulse 2.2s ease-in-out infinite;
}
.patrol-ping.pp-inner { animation-delay: -1.1s; }

/* ---------- 新增 keyframes ---------- */
@keyframes iconBreathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.035); }
}
@keyframes btnShimmer {
  0%   { transform: translateX(-120%); }
  100% { transform: translateX(220%); }
}
@keyframes boatBob {
  0%, 100% { transform: translateY(0) rotate(-0.6deg); }
  50%      { transform: translateY(-5px) rotate(0.6deg); }
}
@keyframes waveDrift {
  0%, 100% { transform: translateX(0); }
  50%      { transform: translateX(-14px); }
}
@keyframes bubbleRise {
  0%   { transform: translateY(0);    opacity: 0.75; }
  50%  { transform: translateY(-10px); opacity: 1; }
  100% { transform: translateY(-18px); opacity: 0; }
}
@keyframes ringPulse {
  0%, 100% { transform: scale(0.9); opacity: 0.25; }
  50%      { transform: scale(1.15); opacity: 0.55; }
}
@keyframes feedZonePulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.55; }
}
@keyframes fishDrift {
  0%, 100% { transform: translateX(0); }
  50%      { transform: translateX(8px); }
}
@keyframes pelletDrop {
  0%   { transform: translateY(-10px); opacity: 0; }
  10%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { transform: translateY(16px); opacity: 0; }
}
@keyframes patrolDraw {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -280; }
}

/* ---------- Reveal 动画 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}
.fade-in.is-visible { opacity: 1; transform: none; }
.fade-in.delay-1 { transition-delay: 100ms; }
.fade-in.delay-2 { transition-delay: 200ms; }
.fade-in.delay-3 { transition-delay: 300ms; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .advantage-grid { gap: var(--space-5); }
  .stat-grid { gap: var(--space-6); }
}

@media (max-width: 1024px) {
  .hero-grid,
  .about-grid,
  .contact-grid { gap: var(--space-12); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid.grid-2 { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid.grid-3 { grid-template-columns: repeat(3, 1fr); }
  .scenario-card { padding: var(--space-8); gap: var(--space-8); }
}

@media (max-width: 768px) {
  :root {
    --fs-hero: 2rem;
    --fs-h2: 1.5rem;
  }
  .section { padding-block: 3.5rem; }
  .section-head { margin-bottom: var(--space-10); }
  .hero-lede { font-size: 1.05rem; }
  .nav-toggle { display: inline-flex; }
  .nav-menu {
    position: fixed;
    inset: 72px 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4) var(--space-6) var(--space-8);
    transform: translateY(-120%);
    visibility: hidden;
    transition: transform var(--dur-base) var(--ease), visibility 0s linear var(--dur-base);
    box-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.2);
    border-top: 1px solid var(--c-border);
  }
  .nav-menu.is-open {
    transform: none;
    visibility: visible;
    transition: transform var(--dur-base) var(--ease);
  }
  .nav-menu a {
    padding: 0.85rem 0;
    color: var(--c-text) !important;
    border-bottom: 1px solid var(--c-border);
  }
  .nav-menu a::after { display: none; }
  .nav-menu li:last-child a { border-bottom: none; margin-top: var(--space-3); }
  .nav-cta { text-align: center; }

  .hero { padding-top: 100px; min-height: auto; }
  .hero-grid,
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 320px; margin: var(--space-8) auto 0; }
  .about-visual { aspect-ratio: 5/4; }
  .scenario-card,
  .scenario-card:nth-child(even) {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-6);
  }
  .scenario-card:nth-child(even) .scenario-visual { order: 0; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .advantage-grid.grid-3 { grid-template-columns: 1fr; }
  .contact-info,
  .contact-form { padding: var(--space-8); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  :root {
    --fs-hero: 1.8rem;
    --fs-h2: 1.45rem;
  }
  .brand-logo { width: 34px; height: 34px; }
  .brand-logo img { width: 27px; height: 27px; }
  .brand-name { font-size: 1.25rem; }
  .contact-info-title,
  .form-title { font-size: 1.5rem; }
  .stat-value { font-size: 1.75rem; }
  .ps-subgroup .stat-value { white-space: normal; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { gap: var(--space-6); }
  .advantage-grid { grid-template-columns: 1fr; }
  .advantage-grid.grid-2,
  .advantage-grid.grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto; }
  .fade-in { opacity: 1; transform: none; }
}