:root {
  --ink: #1a2748;
  --ink-2: #3b4a6b;
  --ink-3: #444444;
  --ink-4: #9aa3bc;
  --line: #e8ecf6;
  --line-2: #f1f4fb;
  --bg: #f4f6fc;
  --surface: #ffffff;
  --primary: #004ea2;
  --primary-2: #1c6dc4;
  --primary-3: #4a90e2;
  --primary-50: #e8f1fc;
  --violet: #1c6dc4;
  --violet-2: #4a90e2;
  --cyan: #5ec5ff;
  --green: #10b981;
  --amber: #f59e0b;
  --pink: #7eb6f0;
  --bg-grad: linear-gradient(180deg, #e8f1fc 0%, #eff6fd 52%, #f7fbff 100%);
  --bg-grad-2: linear-gradient(135deg, #c9dff7 0%, #d8e8f9 50%, #e9f2fb 100%);
  --fontCN:
    "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --fontEN: "DM Sans", var(--fontCN);
  --shadow-sm: 0 4px 14px -4px rgba(0, 78, 162, 0.12);
  --shadow-md: 0 14px 36px -10px rgba(0, 78, 162, 0.18);
  --shadow-lg: 0 30px 80px -20px rgba(0, 78, 162, 0.25);
}

#value {
  padding-top: 0px;
}

.hero-wrapper {
  overflow: hidden;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: auto 100%;
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-wrapper .hero-content {
  background: linear-gradient(
    to right,
    rgba(5, 36, 77, 0) 0%,
    rgba(5, 36, 77, 0.9) 47%,
    rgba(5, 36, 77, 0) 94%
  );
  position: absolute;
  width: auto;
  min-width: 60%;
  text-align: center;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
  align-items: center;
  padding: 50px 100px;
}
.hero-wrapper .hero-content .title {
  color: #9ecbff;
  margin: 0 auto;
  font-size: 40px;
  background-image: linear-gradient(to bottom, #ffffff 0%, #9ecbff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-wrapper .hero-content .descrip {
  color: #FFFFFF;
  margin: 0 auto;
  font-size: 14px;
}
.hero-wrapper img {
  width: 100%;
  filter: Alpha(Opacity=0);
  min-height: 120px;
}

.hydrovis-content * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.hydrovis-content a {
  color: inherit;
  text-decoration: none;
}
.hydrovis-content img,
.hydrovis-content svg {
  display: block;
  max-width: 100%;
}

.hydrovis-content {
  position: relative;
  font-family: var(--fontCN);
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.hydrovis-content .wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

.model-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 1000;
  background: rgba(0, 78, 162, 0.08);
}

.model-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--violet-2),
    var(--cyan)
  );
  box-shadow: 0 0 14px rgba(74, 144, 226, 0.45);
}

.model-quicknav {
  position: fixed;
  right: 28px;
  top: 50%;
  z-index: 50;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(0, 78, 162, 0.12);
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(16px);
  border-radius: 100px;
  box-shadow: var(--shadow-sm);
}

.model-quicknav a {
  width: 42px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  transition: all 0.2s;
}

.model-quicknav a:hover,
.model-quicknav a.active {
  background: linear-gradient(135deg, var(--primary), var(--violet-2));
  color: #fff;
  box-shadow: 0 8px 18px -8px rgba(0, 78, 162, 0.55);
}


.model-hero {
  position: relative;
  background: var(--bg-grad);
  overflow: hidden;
}

.hydrovis-content .value-grid > * {
  min-width: 0;
}

.hydrovis-content .section {
  padding: 110px 0;
  position: relative;
}

.hydrovis-content .sec-head {
  margin-bottom: 56px;
}
.hydrovis-content .sec-head.center {
  text-align: center;
}

.hydrovis-content .sec-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 14px;
}

.hydrovis-content .sec-title em {
  font-style: normal;
  background: linear-gradient(135deg, #004ea2 0%, #4a90e2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hydrovis-content .sec-desc {
  font-size: 15px;
  color: var(--ink-3);
  max-width: 760px;
  line-height: 1.8;
}

.hydrovis-content .sec-head.center .sec-desc {
  margin: 0 auto;
}

.arch-figure {
  padding: 22px;
  border-radius: 30px;
  background: #fff;
  border: 1px solid rgba(0, 78, 162, 0.1);
  box-shadow: var(--shadow-md);
}

.arch-figure img {
  width: 100%;
  border-radius: 22px;
  display: block;
}

.arch-section {
  background: linear-gradient(180deg, var(--primary-50) 0%, #fff 100%);
}

.value-grid {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.value-grid--feature {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  margin-bottom: 0;
}

.feature-card {
  min-width: 0;
  min-height: 252px;
  padding: 30px 24px 26px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, #f8fbff 100%);
  border: 1px solid rgba(0, 78, 162, 0.1);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(94, 197, 255, 0.18), transparent 52%);
  opacity: 0.85;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(28, 109, 196, 0.18);
}

.feature-icon {
  width: 76px;
  height: 76px;
  margin-bottom: 20px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #f8fbff 0%, #eaf3ff 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 10px 24px -14px rgba(0, 78, 162, 0.38);
  position: relative;
  z-index: 1;
}

.feature-icon::after {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 18px;
  border: 1px solid rgba(74, 144, 226, 0.16);
}

.feature-icon svg {
  width: 42px;
  height: 42px;
  position: relative;
  z-index: 1;
}

.feature-title {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: 26px;
  line-height: 1.2;
  color: var(--ink);
}

.feature-desc {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-3);
}





.hydrovis-content .anim {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hydrovis-content .anim.in {
  opacity: 1;
  transform: none;
}

@media (max-width: 1180px) {
  .model-quicknav {
    display: none;
  }
}

@media (max-width: 960px) {
  .hero-wrapper {
    min-height: clamp(320px, 62vw, 520px);
  }
  .hero-wrapper img {
    min-height: clamp(320px, 62vw, 520px);
    object-fit: cover;
    object-position: center;
  }
  .hero-wrapper .hero-content {
    width: calc(100% - 64px);
    min-width: 0;
    max-width: 680px;
    padding: 36px 32px;
    background: linear-gradient(
      180deg,
      rgba(5, 36, 77, 0.18) 0%,
      rgba(5, 36, 77, 0.82) 100%
    );
    border-radius: 28px;
    backdrop-filter: blur(8px);
  }
  .hero-wrapper .hero-content .title {
    font-size: clamp(30px, 5vw, 36px);
    line-height: 1.15;
  }
  .hero-wrapper .hero-content .descrip {
    font-size: 15px;
    line-height: 1.8;
  }
  .value-grid--feature {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
  }
  .feature-card {
    min-height: 228px;
    padding: 26px 20px 24px;
  }
  .feature-title {
    font-size: 22px;
  }
  .feature-desc {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .hero-wrapper {
    min-height: auto;
  }
  .hero-wrapper img {
    min-height: 360px;
    object-position: 62% center;
  }
  .hero-wrapper .hero-content {
    width: calc(100% - 32px);
    left: 16px;
    right: 16px;
    top: auto;
    bottom: 16px;
    transform: none;
    padding: 24px 18px;
    align-items: flex-start;
    text-align: left;
    border-radius: 20px;
  }
  .hero-wrapper .hero-content .title {
    margin: 0;
    font-size: 28px;
  }
  .hero-wrapper .hero-content .descrip {
    font-size: 13px;
  }
  .hydrovis-content .wrap,
  .model-hero {
    padding-top: 0;
    padding-bottom: 60px;
  }
  .hydrovis-content .section {
    padding: 56px 0;
  }
  .hydrovis-content .sec-head {
    margin-bottom: 32px;
  }
  .hydrovis-content .hero h3 {
    font-size: 38px;
    line-height: 1.05;
    letter-spacing: 0;
  }
  .hydrovis-content .sec-title {
    font-size: 28px;
  }
  .hydrovis-content .sec-desc {
    font-size: 13.5px;
  }
  .arch-figure {
    padding: 14px;
    border-radius: 20px;
  }
  .arch-figure img {
    border-radius: 14px;
  }
  .value-grid {
    gap: 14px;
    margin-bottom: 14px;
  }
  .value-grid--feature {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature-card {
    min-height: auto;
    padding: 22px 18px 20px;
    border-radius: 18px;
  }
  .feature-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    border-radius: 18px;
  }
  .feature-icon::after {
    inset: 7px;
    border-radius: 14px;
  }
  .feature-icon svg {
    width: 36px;
    height: 36px;
  }
  .feature-title {
    font-size: 20px;
    margin-bottom: 10px;
  }
  .feature-desc {
    font-size: 13px;
    line-height: 1.75;
  }
}

@media (hover: none) {
  .feature-card:hover {
    transform: none;
  }
}