:root {
  --blue-950: #041d36;
  --blue-900: #062a4f;
  --blue-800: #003b75;
  --blue-700: #0052a5;
  --green: #00a870;
  --orange: #ff8a00;
  --ink: #17212b;
  --muted: #667585;
  --line: #dce5ee;
  --mist: #eaf5ff;
  --paper: #f7fafc;
  --white: #ffffff;

  /* 圆角梯度 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-pill: 999px;

  /* 阴影分级（轻、锐、干净） */
  --shadow-sm: 0 2px 8px rgba(4, 28, 55, 0.06);
  --shadow-md: 0 10px 28px rgba(4, 28, 55, 0.1);
  --shadow-lg: 0 20px 48px rgba(4, 28, 55, 0.14);
  --shadow: var(--shadow-lg);

  /* 语义色 */
  --danger: #c0392b;
  --overlay: rgba(0, 24, 48, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  background: var(--white);
  line-height: 1.65;
}

img,
video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 40;
  top: 0;
  left: 0;
  right: 0;
  padding: 8px clamp(16px, 4vw, 58px) 8px;
  transition: transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1), padding 180ms ease;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.4) 100%);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
}

/* 顶部鼠标感知区：扩大的不可见热区，鼠标进入即显示导航 */
.nav-hover-zone {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  z-index: 60;
  /* 完全透明且不拦截点击：顶部唤出导航由 script.js 的 document mousemove 处理，
     此层若接收事件会盖住导航栏（z-index 60 > header 40）导致点击失效 */
  pointer-events: none;
}

/* 滚动下滑时自动隐藏（spring 下移 + 轻微缩） */
.site-header.is-nav-hidden {
  transform: translateY(-100%) scaleY(0.85);
  transform-origin: center top;
}

.nav-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  width: fit-content;
  max-width: min(1120px, calc(100% - 24px));
  margin: 0 auto;
  padding: 4px 8px 4px 14px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(244, 250, 255, 0.92) 50%, rgba(255, 255, 255, 0.94) 100%);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow:
    0 6px 20px rgba(4, 28, 55, 0.08),
    0 1px 4px rgba(4, 28, 55, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(0, 59, 117, 0.03);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-radius: 999px;
  transition:
    transform 480ms cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 360ms ease,
    background 360ms ease,
    border-color 360ms ease;
  position: relative;
  transform-origin: center top;
  will-change: transform;
}

/* 药丸顶部微光（pseudo） */
.nav-toolbar::before {
  content: "";
  position: absolute;
  inset: 1px 24px auto 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.95), transparent);
  border-radius: 999px 999px 0 0;
  pointer-events: none;
}

/* 药丸底部微光环（active 时显示） */
.nav-toolbar::after {
  content: "";
  position: absolute;
  inset-inline: 8px;
  bottom: -4px;
  height: 8px;
  border-radius: 0 0 999px 999px;
  background: radial-gradient(ellipse at center, rgba(0, 168, 112, 0.32) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 280ms ease;
  pointer-events: none;
}

/* hover 药丸：弹伸缩 + 增强阴影 + 绿色微光环 */
.nav-toolbar:hover,
.site-header:not(.is-nav-hidden) .nav-toolbar:hover {
  transform: scale(1.03) translateY(-1px);
  border-color: rgba(0, 168, 112, 0.45);
  box-shadow:
    0 22px 56px rgba(4, 28, 55, 0.22),
    0 8px 20px rgba(4, 28, 55, 0.12),
    0 0 0 1px rgba(0, 168, 112, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(0, 59, 117, 0.08);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 1) 0%, rgba(240, 248, 255, 0.98) 50%, rgba(255, 255, 255, 1) 100%);
}

.nav-toolbar:hover::after,
.site-header:not(.is-nav-hidden) .nav-toolbar:hover::after {
  opacity: 1;
}

/* 点击药丸时（:active 状态）瞬间下压 */
.nav-toolbar:active {
  transform: scale(0.99) translateY(0);
  transition-duration: 80ms;
}

.site-header.is-scrolled .nav-toolbar,
.site-header.is-open .nav-toolbar {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 252, 255, 0.96) 50%, rgba(255, 255, 255, 0.96) 100%);
  box-shadow:
    0 14px 44px rgba(4, 28, 55, 0.18),
    0 4px 12px rgba(4, 28, 55, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(0, 59, 117, 0.05);
}

.brand {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 6px 10px 6px 0;
  border-radius: 8px;
  cursor: pointer;
  pointer-events: auto;
  transition: filter 300ms ease, transform 300ms ease;
}

.brand img {
  width: 148px;
  height: auto;
  transition: filter 300ms ease, transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand:hover img {
  filter: drop-shadow(0 4px 12px rgba(0, 168, 112, 0.32))
          drop-shadow(0 2px 6px rgba(0, 59, 117, 0.2));
  transform: scale(1.03);
}

.brand:focus-visible {
  outline: 2px solid var(--blue-700);
  outline-offset: 4px;
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-nav a,
.site-nav .nav-link {
  position: relative;
  white-space: nowrap;
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--blue-900);
  background: transparent;
  border: 0;
  font: inherit;
  cursor: pointer;
  pointer-events: auto;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 220ms ease, color 220ms ease, transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 链接 hover 微缩放反馈 */
.site-nav a:hover,
.site-nav a:focus-visible {
  transform: translateY(-1px);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav .nav-link:hover,
.site-nav .nav-link:focus-visible {
  background: linear-gradient(180deg, rgba(234, 245, 255, 0.9) 0%, rgba(234, 245, 255, 0.6) 100%);
  color: var(--blue-700);
  box-shadow: inset 0 0 0 1px rgba(0, 82, 165, 0.08);
}

.site-nav a::after,
.site-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue-700));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav .nav-link:hover::after,
.site-nav .nav-link:focus-visible::after {
  transform: scaleX(1);
}

/* nav-item 容器（带下拉） */
.nav-item {
  position: relative;
  pointer-events: auto;
}

/* 下拉面板 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-start: 0;
  z-index: 70;
  min-width: 260px;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  pointer-events: auto;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-dropdown-arrow {
  font-size: 10px;
  color: var(--muted);
  transition: transform 200ms ease;
}

.nav-item.is-open > .nav-dropdown-trigger {
  color: var(--blue-700);
}

.nav-item.is-open > .nav-dropdown-trigger .nav-dropdown-arrow {
  transform: rotate(180deg);
}

.nav-item.is-open > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 下拉菜单项 */
.nav-dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--blue-900);
  text-decoration: none;
  transition: background 140ms ease, color 140ms ease, transform 140ms ease;
}

.nav-dropdown-item {
  position: relative;
}

.nav-dropdown-item:hover,
.nav-dropdown-item:focus-visible {
  background: linear-gradient(90deg, var(--mist) 0%, rgba(0, 168, 112, 0.06) 100%);
  color: var(--blue-700);
  transform: translateX(4px);
  padding-inline-start: 16px;
}

[dir="rtl"] .nav-dropdown-item:hover,
[dir="rtl"] .nav-dropdown-item:focus-visible {
  transform: translateX(-4px);
}

/* 下拉项左侧指示条（hover 出现） */
.nav-dropdown-item::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--green), var(--blue-700));
  border-radius: 0 2px 2px 0;
  transform: translateY(-50%);
  transition: height 220ms ease;
}

.nav-dropdown-item:hover::before,
.nav-dropdown-item:focus-visible::before {
  height: 60%;
}

.nav-dropdown-item-content {
  flex: 1 1 auto;
  min-width: 0;
}

.nav-dropdown-item-label {
  font-size: 14px;
  font-weight: 800;
  line-height: 1.3;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-dropdown-item-desc {
  margin-top: 3px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  line-height: 1.45;
}

/* 下拉菜单项右侧的箭头（hover 时出现） */
.nav-dropdown-item::after {
  content: "→";
  flex: 0 0 auto;
  align-self: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-700);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 180ms ease, transform 180ms ease;
}

[dir="rtl"] .nav-dropdown-item::after {
  content: "←";
  transform: translateX(6px);
}

.nav-dropdown-item:hover::after,
.nav-dropdown-item:focus-visible::after {
  opacity: 1;
  transform: translateX(0);
}

.nav-dropdown-item.is-external::after {
  content: "↗";
}

[dir="rtl"] .nav-dropdown-item.is-external::after {
  content: "↗";
}

/* 下拉菜单图标：6 组主题色（替代原来的 01/02 数字） */
.nav-dropdown-item-icon {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, var(--mist) 0%, rgba(0, 168, 112, 0.12) 100%);
  color: var(--blue-700);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
  transition: transform 240ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 240ms ease;
}

.nav-dropdown-item:hover .nav-dropdown-item-icon {
  transform: scale(1.1) rotate(-6deg);
  box-shadow: 0 6px 16px rgba(0, 82, 165, 0.18);
}

[dir="rtl"] .nav-dropdown-item:hover .nav-dropdown-item-icon {
  transform: scale(1.1) rotate(6deg);
}

/* 6 组下拉的主题色（降饱和、统一"浅底+中调"配方，保留分区语义） */
[data-nav-dropdown="brand"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #e8eff9 0%, #cddcf1 100%);
  color: #244a9a;
}
[data-nav-dropdown="tech"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #e5f3ec 0%, #c7e6d5 100%);
  color: #1b7a56;
}
[data-nav-dropdown="solutions"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #fbeeda 0%, #f4d8b4 100%);
  color: #b5591a;
}
[data-nav-dropdown="products"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #ece9f6 0%, #d5cdec 100%);
  color: #6a4dab;
}
[data-nav-dropdown="cases"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #e3f3ef 0%, #c4e5db 100%);
  color: #227e6e;
}
[data-nav-dropdown="support"] .nav-dropdown-item-icon {
  background: linear-gradient(135deg, #f6e7ef 0%, #ecccdc 100%);
  color: #a8497a;
}

.nav-dropdown-item.is-external .nav-dropdown-item-icon::after {
  content: "↗";
  font-size: 12px;
}

/* 方案咨询 CTA（最后一个，无下拉） — 渐变 + 光泽扫过 */
.nav-action {
  position: relative;
  padding: 8px 16px;
  color: var(--white);
  background: linear-gradient(135deg, var(--orange) 0%, #e85d04 100%);
  border-radius: 999px;
  margin-inline-start: 6px;
  overflow: hidden;
  transition: transform 200ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 240ms ease;
  box-shadow: 0 4px 12px rgba(255, 138, 0, 0.28);
}

.nav-action::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: translateX(-150%) skewX(-15deg);
  transition: transform 700ms ease;
  pointer-events: none;
}

.nav-action:hover,
.nav-action:focus-visible {
  background: linear-gradient(135deg, #e85d04 0%, #c2410c 100%);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 138, 0, 0.42);
}

.nav-action:hover::before,
.nav-action:focus-visible::before {
  transform: translateX(180%) skewX(-15deg);
}

.nav-action::after {
  display: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid currentColor;
  color: var(--blue-900);
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media {
  background: var(--blue-950);
  transform: scale(1.02);
}

.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(0, 20, 42, 0.86), rgba(0, 55, 94, 0.46) 50%, rgba(0, 0, 0, 0.12)),
    linear-gradient(0deg, rgba(0, 20, 42, 0.76), rgba(0, 0, 0, 0.02) 44%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(860px, calc(100% - 40px));
  margin: 0 0 clamp(92px, 15vh, 152px) clamp(20px, 6vw, 92px);
}

.eyebrow,
.section-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 14px 6px 28px;
  color: var(--blue-700);
  background: var(--mist);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-radius: 999px;
  position: relative;
}

.section-kicker::before {
  content: "";
  position: absolute;
  inset-inline-start: 12px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green) 0%, var(--blue-700) 100%);
  transform: translateY(-50%);
  box-shadow: 0 0 0 3px rgba(0, 168, 112, 0.18);
}

/* 深色背景上的 kicker：青绿玻璃胶囊 + 亮薄荷文字 + 描边，醒目且高级 */
.intent-section .section-kicker,
.expo-feature .section-kicker,
.video-feature .section-kicker,
.contact-panel .section-kicker,
.purchase-strip .section-kicker,
.dark-card .section-kicker {
  color: #6ff2c1;
  background: rgba(0, 168, 112, 0.14);
  box-shadow: inset 0 0 0 1px rgba(0, 168, 112, 0.4);
}

.intent-section .section-kicker::before,
.expo-feature .section-kicker::before,
.video-feature .section-kicker::before,
.contact-panel .section-kicker::before,
.purchase-strip .section-kicker::before,
.dark-card .section-kicker::before {
  background: linear-gradient(135deg, #6ff2c1 0%, #35c68a 100%);
  box-shadow: 0 0 0 3px rgba(0, 168, 112, 0.28), 0 0 10px rgba(111, 242, 193, 0.5);
}

.hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(42px, 8vw, 90px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(18px, 2.2vw, 26px);
}

.hero-actions,
.hero-path,
.tool-tags,
.spec-note,
.system-scenes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-actions {
  gap: 14px;
  margin-top: 34px;
}

.hero-path {
  margin-top: 18px;
}

.hero-path a {
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: var(--overlay);
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 800;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-weight: 900;
  line-height: 1.2;
  cursor: pointer;
  border-radius: 999px;
  position: relative;
  overflow: hidden;
  transition: transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 240ms ease, background 220ms ease;
}

/* 通用按钮光泽扫过效果（仅 .button-primary 和 .nav-action） */
.button::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: translateX(-150%) skewX(-15deg);
  transition: transform 700ms ease;
  pointer-events: none;
}

.button:hover::before,
.button:focus-visible::before {
  transform: translateX(180%) skewX(-15deg);
}

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--orange) 0%, #e85d04 100%);
  box-shadow: 0 8px 20px rgba(255, 138, 0, 0.32);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: linear-gradient(135deg, #e85d04 0%, #c2410c 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(255, 138, 0, 0.42);
}

.button-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.85);
  transform: translateY(-1px);
}

.dark-ghost {
  color: var(--blue-900);
  border-color: rgba(0, 59, 117, 0.28);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.dark-ghost:hover,
.dark-ghost:focus-visible {
  background: var(--white);
  border-color: var(--blue-700);
  color: var(--blue-700);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 59, 117, 0.18);
}

.hero-aside {
  position: absolute;
  z-index: 1;
  right: clamp(20px, 5vw, 70px);
  bottom: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
  max-width: min(640px, calc(100% - 40px));
}

.hero-aside span {
  padding: 9px 13px;
  color: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: var(--overlay);
  backdrop-filter: blur(12px);
  font-size: 13px;
  font-weight: 800;
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--blue-950);
  color: var(--white);
}

.metric {
  min-height: 142px;
  padding: 28px clamp(18px, 3vw, 44px);
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.metric strong {
  display: block;
  color: var(--white);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
}

.metric span {
  display: block;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.section-pad {
  padding: clamp(72px, 10vw, 128px) clamp(20px, 6vw, 92px);
}

.section-heading {
  max-width: 980px;
  margin-bottom: clamp(36px, 6vw, 74px);
}

.section-heading.narrow {
  max-width: 760px;
}

.section-heading p {
  margin: 18px 0 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
}

.intro {
  background: var(--paper);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(280px, 1.08fr);
  gap: clamp(32px, 7vw, 100px);
  align-items: start;
}

.intro h2,
.section-heading h2,
.feature-copy h2,
.contact-panel h2,
.faq-title h2,
.materials-hero h1,
.purchase-strip h2 {
  margin: 0;
  color: var(--blue-900);
  font-size: clamp(30px, 4.8vw, 58px);
  line-height: 1.13;
  letter-spacing: 0;
}

.intro-copy p,
.feature-copy p,
.contact-panel p,
.faq-list p,
.solution-card p,
.case-card p,
.service-steps p,
.tech-points p,
.materials-hero p,
.library-card p,
.agent-message p {
  color: var(--muted);
}

.intro-copy p {
  margin: 0 0 18px;
  font-size: 18px;
}

.intent-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 80px);
  padding: clamp(64px, 8vw, 96px) clamp(20px, 6vw, 92px);
  color: var(--white);
  background: var(--blue-950);
}

.intent-copy h2 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 56px);
  line-height: 1.12;
}

.intent-copy p {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.intent-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.intent-grid a {
  min-height: 164px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  transition: transform 180ms ease, background 180ms ease;
}

.intent-grid a:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.1);
}

.intent-grid span,
.intent-grid strong,
.intent-grid em {
  display: block;
}

.intent-grid span,
.comparison-grid span,
.news-grid span,
.system-grid span,
.support-grid span,
.support-card-link span,
.point-index,
.solution-card span,
.service-steps span {
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.intent-grid strong {
  margin-top: 16px;
  color: var(--white);
  font-size: 18px;
  line-height: 1.3;
}

.intent-grid em {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.68);
  font-style: normal;
}

.tech-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(320px, 1.15fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.product-stage {
  position: relative;
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--mist), #ffffff 56%);
  box-shadow: var(--shadow);
}

.product-main {
  display: grid;
  min-height: 340px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(231, 244, 255, 0.96), #ffffff);
}

.product-main > img,
.product-main > video {
  grid-row: 1;
  grid-column: 1;
  width: 100%;
  height: 100%;
  max-height: 360px;
  object-fit: contain;
}

.product-main > video {
  background: #000;
  object-fit: cover;
}

.product-main > [hidden] {
  display: none;
}

.product-media-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.product-media-copy span {
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.product-media-copy strong {
  color: var(--blue-900);
  font-size: 16px;
  font-weight: 900;
  line-height: 1.4;
  text-align: right;
}

.product-thumbs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.product-thumbs button {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 6px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  cursor: pointer;
}

.product-thumbs button.is-active,
.product-thumbs button:hover {
  border-color: var(--green);
  color: var(--blue-900);
  background: rgba(0, 168, 112, 0.09);
}

.product-thumbs img {
  width: 100%;
  height: 54px;
  object-fit: cover;
}

.product-thumbs span {
  overflow: hidden;
  color: inherit;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.spec-ribbon {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.spec-ribbon span {
  padding: 10px 8px;
  border: 1px solid var(--line);
  color: var(--blue-900);
  background: rgba(255, 255, 255, 0.86);
  text-align: center;
  font-size: 13px;
  font-weight: 800;
}

.tech-points,
.comparison-grid,
.solution-grid,
.solution-taxonomy,
.news-grid,
.system-grid,
.support-grid,
.download-grid,
.product-library,
.case-grid,
.cert-row,
.service-steps {
  display: grid;
  gap: 16px;
}

.tech-points {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.tech-points article,
.solution-card,
.case-card,
.service-steps li,
.faq-list details,
.comparison-grid article,
.solution-taxonomy article,
.news-grid article,
.system-grid article,
.support-grid article,
.support-card-link,
.library-card,
.download-card {
  border: 1px solid var(--line);
  background: var(--white);
}

.tech-points article {
  min-height: 230px;
  padding: 28px;
}

.comparison-block {
  margin-top: clamp(42px, 7vw, 86px);
}

.comparison-table {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.comparison-row {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr 1.35fr 1.05fr;
  border-top: 1px solid var(--line);
}

.comparison-row:first-child {
  border-top: 0;
}

.comparison-row > * {
  margin: 0;
  padding: 20px 22px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.comparison-row > *:first-child {
  border-left: 0;
}

.comparison-row strong {
  color: var(--blue-900);
  font-size: 17px;
}

.comparison-row p:nth-child(3) {
  color: var(--blue-900);
  font-weight: 700;
}

.comparison-head {
  background: var(--blue-950);
}

.comparison-head span {
  color: var(--white);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.comparison-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tech-advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.tech-advantage-grid article {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--white);
}

.tech-advantage-grid span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--green);
  font-weight: 900;
}

.comparison-grid article,
.solution-taxonomy article,
.news-grid article,
.system-grid article,
.support-grid article,
.support-card-link,
.download-card {
  padding: 28px;
}

.comparison-grid span,
.news-grid span,
.system-grid span,
.support-grid span,
.support-card-link span {
  display: inline-block;
  margin-bottom: 16px;
}

h3 {
  margin: 0 0 12px;
  color: var(--blue-900);
  font-size: 22px;
  line-height: 1.25;
}

.solutions,
.service,
.support-hub,
.system-solution,
.technical-library,
.materials-page {
  background: var(--paper);
}

.solution-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.solution-card {
  min-height: 280px;
  padding: 30px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.solution-card:hover,
.download-card:hover,
.support-card-link:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.solution-taxonomy {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
}

.solution-taxonomy article {
  min-height: 190px;
}

.image-feature {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 680px;
  background: var(--blue-950);
}

.image-feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-media {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: clamp(620px, 44vw, 760px);
  background: #031f38;
}

.project-media > img,
.project-media > video {
  grid-row: 1;
  grid-column: 1;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
}

.project-media > video {
  background: #000;
}

.project-media > [hidden] {
  display: none;
}

.project-thumbs {
  grid-row: 2;
  grid-column: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  background: rgba(0, 24, 48, 0.94);
}

.project-thumbs button {
  display: grid;
  gap: 6px;
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.78);
  cursor: pointer;
  text-align: left;
}

.project-thumbs button.is-active,
.project-thumbs button:hover {
  border-color: var(--green);
  background: rgba(0, 168, 112, 0.16);
  color: var(--white);
}

.project-thumbs img {
  width: 100%;
  height: 58px;
  min-height: 0;
  object-fit: cover;
}

.project-thumbs span {
  font-size: 12px;
  font-weight: 800;
}

.feature-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 7vw, 92px);
}

.feature-copy h2,
.contact-panel h2,
.purchase-strip h2 {
  color: var(--white);
}

.feature-copy p,
.contact-panel p {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.feature-note {
  margin-top: 20px;
  padding-left: 16px;
  border-left: 3px solid var(--green);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
}

.case-grid {
  grid-template-columns: 1.25fr 1fr 0.85fr;
  gap: 18px;
}

.case-card {
  padding: 30px;
}

.case-card ul,
.library-card ul,
.purchase-strip ul,
.agent-message ul {
  margin: 16px 0 0;
  padding-left: 20px;
}

.case-card li + li,
.agent-message li + li {
  margin-top: 10px;
}

.customer-case-card {
  padding: 26px;
}

.customer-case-list {
  display: grid;
  gap: 12px;
}

.customer-case-list section {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.customer-case-list span {
  display: block;
  margin-bottom: 6px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.customer-case-list p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.image-card {
  padding: 0;
  overflow: hidden;
}

.image-card > img,
.case-gallery > img {
  width: 100%;
  height: 310px;
  object-fit: cover;
}

.case-gallery {
  display: grid;
  gap: 8px;
}

.case-gallery > img {
  height: 292px;
}

.case-thumbs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  padding: 0 8px 8px;
}

.case-thumbs button {
  display: block;
  height: 58px;
  padding: 0;
  border: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  overflow: hidden;
}

.case-thumbs button.is-active {
  border-color: var(--green);
}

.case-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.76;
  transition: opacity 160ms ease, transform 160ms ease;
}

.case-thumbs button:hover img,
.case-thumbs button.is-active img {
  opacity: 1;
  transform: scale(1.03);
}

.image-card div {
  padding: 26px;
}

.dark-card {
  color: var(--white);
  background: var(--blue-950);
  border-color: var(--blue-950);
}

.dark-card h3,
.dark-card strong {
  color: var(--white);
}

.dark-card strong {
  display: block;
  margin: 28px 0 10px;
  font-size: 66px;
  line-height: 1.05;
}

.dark-card p {
  color: rgba(255, 255, 255, 0.72);
}

.cert-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.cert-row figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--white);
  overflow: hidden;
}

.cert-row img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  object-position: center;
}

.cert-row figcaption {
  padding: 16px 18px;
  color: var(--blue-900);
  font-weight: 900;
}

.service-steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-steps li {
  min-height: 250px;
  padding: 30px;
}

.news-section {
  background: var(--white);
}

.news-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.news-grid article {
  min-height: 230px;
  background: var(--paper);
}

.expo-feature {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  margin-top: 22px;
  padding: clamp(22px, 4vw, 40px);
  background: var(--blue-950);
}

.expo-gallery {
  display: grid;
  gap: 10px;
}

.expo-gallery > img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.expo-thumbs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.expo-thumbs button {
  display: block;
  height: 74px;
  padding: 0;
  border: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  overflow: hidden;
}

.expo-thumbs button.is-active {
  border-color: var(--green);
}

.expo-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.76;
  transition: opacity 160ms ease, transform 160ms ease;
}

.expo-thumbs button:hover img,
.expo-thumbs button.is-active img {
  opacity: 1;
  transform: scale(1.03);
}

.expo-feature h3 {
  color: var(--white);
  font-size: clamp(26px, 3vw, 40px);
}

.expo-feature p {
  color: rgba(255, 255, 255, 0.74);
}

.text-link {
  display: inline-flex;
  margin-top: 10px;
  color: var(--white);
  font-weight: 900;
  border-bottom: 2px solid var(--green);
}

.faq {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(30px, 6vw, 80px);
}

.faq-list details {
  padding: 0 24px;
}

.faq-list details + details {
  margin-top: 12px;
}

.faq-list summary {
  cursor: pointer;
  padding: 22px 0;
  color: var(--blue-900);
  font-size: 18px;
  font-weight: 900;
}

.faq-list p {
  margin: 0 0 22px;
}

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--blue-950);
  color: var(--white);
}

.contact-media img {
  width: 100%;
  height: 100%;
  min-height: 620px;
  object-fit: cover;
}

.contact-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 7vw, 92px);
}

.contact-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 32px;
}

.contact-list a,
.contact-list span {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 700;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 92px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--white);
}

.site-footer img {
  width: 170px;
}

.site-footer p {
  margin: 0;
}

.materials-hero {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(34px, 6vw, 88px);
  align-items: center;
  min-height: 760px;
  padding: 160px clamp(20px, 6vw, 92px) 80px;
  background: linear-gradient(135deg, #eef7ff 0%, #ffffff 48%, #eaf8f2 100%);
}

.materials-hero h1 {
  max-width: 850px;
}

.materials-hero p {
  max-width: 760px;
  font-size: 18px;
}

.materials-hero-panel,
.agent-form,
.agent-panel {
  border: 1px solid var(--line);
}

.materials-hero-panel {
  padding: clamp(24px, 5vw, 52px);
  background: var(--white);
  box-shadow: var(--shadow);
}

.materials-hero-panel img {
  width: min(420px, 100%);
  margin: 0 auto 24px;
}

.materials-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.materials-badges span,
.spec-note span,
.system-scenes span {
  padding: 10px 12px;
  color: var(--blue-900);
  background: var(--mist);
  font-weight: 900;
  text-align: center;
}

.library-section,
.ai-consult {
  background: var(--white);
}

.library-tools {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(320px, 1.15fr);
  gap: 14px;
  align-items: center;
  margin-bottom: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.library-tools label,
.agent-form label {
  display: grid;
  gap: 8px;
  color: var(--blue-900);
  font-weight: 900;
}

.library-tools input,
.agent-form input,
.agent-form select,
.agent-form textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--white);
}

.tool-tags button {
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--blue-900);
  background: var(--white);
  font-weight: 900;
  cursor: pointer;
}

.tool-tags button.is-active,
.tool-tags button:hover {
  color: var(--white);
  background: var(--blue-700);
  border-color: var(--blue-700);
}

[data-search-item].is-hidden {
  display: none;
}

.product-library {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.library-card {
  min-height: 280px;
  padding: 30px;
}

.featured-card {
  grid-column: span 3;
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(280px, 1.28fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  background: linear-gradient(135deg, #f3fbff, #ffffff 64%);
}

.featured-card img {
  width: min(360px, 100%);
  margin: auto;
}

.spec-table-wrap {
  margin-top: clamp(42px, 7vw, 86px);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--line);
}

.spec-table th,
.spec-table td {
  padding: 15px 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table thead th {
  color: var(--white);
  background: var(--blue-950);
}

.spec-table tbody th {
  width: 150px;
  color: var(--blue-900);
  background: var(--mist);
}

.spec-note {
  margin-top: 14px;
}

.spec-note span {
  border: 1px solid var(--line);
  font-size: 13px;
}

.system-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.system-grid article {
  min-height: 260px;
}

.system-diagram {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background: var(--white);
  overflow: hidden;
}

.system-diagram img {
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  background: var(--white);
}

.system-diagram figcaption {
  padding: 14px 18px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.system-scenes {
  margin-top: 18px;
}

.system-scenes span {
  color: var(--white);
  background: var(--blue-800);
  font-size: 14px;
}

.download-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.download-card {
  min-height: 250px;
  padding: 28px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.download-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  min-height: 34px;
  margin-bottom: 28px;
  color: var(--white);
  background: var(--orange);
  font-size: 13px;
  font-weight: 900;
}

.support-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.support-grid article,
.support-card-link {
  min-height: 230px;
}

.support-card-link {
  display: block;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.agent-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(320px, 1.08fr);
  gap: 18px;
  align-items: stretch;
}

.agent-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 28px;
  background: var(--paper);
}

.agent-form label:nth-last-of-type(1),
.agent-form button {
  grid-column: 1 / -1;
}

.agent-form textarea {
  resize: vertical;
}

.agent-panel {
  display: flex;
  flex-direction: column;
  min-height: 520px;
  padding: 28px;
  color: var(--white);
  background: linear-gradient(180deg, rgba(0, 59, 117, 0.96), rgba(4, 29, 54, 0.98));
}

.agent-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.agent-topline span {
  color: rgba(255, 255, 255, 0.72);
}

.agent-message {
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.82);
}

.agent-message h3 {
  color: var(--white);
}

.agent-message p,
.agent-message li {
  color: rgba(255, 255, 255, 0.82);
}

.purchase-strip {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(280px, 1.1fr);
  gap: clamp(28px, 6vw, 80px);
  padding: clamp(64px, 8vw, 96px) clamp(20px, 6vw, 92px);
  color: var(--white);
  background: var(--blue-950);
}

.purchase-strip li {
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

/* === 资料库增强（搜索筛选 / 滚动进度 / 画廊控件 / 视频 / 智能体） === */

/* 搜索高亮 + 清除按钮 + 空结果 */
[data-search-item] mark {
  background: rgba(255, 138, 0, 0.22);
  color: inherit;
  padding: 0 2px;
  border-radius: 2px;
}

.search-field {
  position: relative;
  display: block;
}

.search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease;
}

.search-clear:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.library-tools label.has-value .search-clear {
  display: inline-flex;
}

.tool-tags-clear {
  min-height: 38px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--blue-900);
  background: var(--paper);
  font-weight: 900;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.tool-tags-clear:hover {
  color: var(--orange);
  background: rgba(255, 138, 0, 0.08);
}

[data-search-empty] {
  grid-column: 1 / -1;
  padding: 48px 24px;
  text-align: center;
  border: 1px dashed var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 14px;
  border-radius: var(--r-sm);
}

/* 滚动进度条 */
[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  z-index: 50;
  background: linear-gradient(90deg, var(--blue-700) 0%, var(--green) 50%, var(--orange) 100%);
  box-shadow: 0 1px 6px rgba(0, 59, 117, 0.32), 0 0 12px rgba(0, 168, 112, 0.18);
  transition: width 80ms linear;
  pointer-events: none;
  border-radius: 0 2px 2px 0;
}

[data-scroll-progress]::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.9; }
}

/* 画廊上一张 / 下一张 */
.gallery-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
}

.gallery-controls button {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--blue-900);
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.gallery-controls button:hover {
  color: var(--white);
  background: var(--blue-700);
  border-color: var(--blue-700);
}

.gallery-controls button:disabled,
.gallery-controls button[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--paper);
  color: var(--muted);
}

/* 视频展示区 */
.video-feature {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  background: var(--blue-950);
  color: var(--white);
}

.video-feature .video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: #000;
}

.video-feature video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-feature p {
  color: rgba(255, 255, 255, 0.86);
}

/* 案例对比表（复用 .comparison-row 模式） */
.case-comparison .comparison-row {
  grid-template-columns: 0.9fr 1fr 1fr 1.1fr;
}

/* 智能体加载 / 复制 / 校验 */
.agent-panel {
  position: relative;
}

.agent-panel.is-loading::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(4, 29, 54, 0.72);
  backdrop-filter: blur(2px);
  z-index: 2;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.agent-panel.is-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  margin: -16px 0 0 -16px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 720ms linear infinite;
  z-index: 3;
}

.agent-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.agent-output-header h3 {
  margin: 0;
}

.agent-copy {
  min-height: 36px;
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font-size: 13px;
  font-weight: 900;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease;
}

.agent-copy:hover {
  background: rgba(0, 168, 112, 0.18);
  border-color: var(--green);
}

.agent-copy.is-copied {
  background: var(--green);
  border-color: var(--green);
}

.field-error {
  display: block;
  margin-top: 4px;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
}

.agent-form input.is-invalid,
.agent-form select.is-invalid,
.agent-form textarea.is-invalid {
  border-color: var(--danger);
  background: #fff5f5;
}

.form-note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 14px;
  border-left: 3px solid var(--green);
  background: rgba(0, 168, 112, 0.08);
  color: var(--blue-900);
  font-size: 13px;
  font-weight: 700;
}

.agent-form .full-row {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.form-actions .button {
  flex: 0 0 auto;
}

.agent-output-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.agent-output-meta span {
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.92);
}

/* 案例对比表中的段落（用于新增的 .case-comparison） */
.case-comparison .comparison-row p {
  color: var(--muted);
}

.case-comparison .comparison-row p strong {
  color: var(--ink);
  font-weight: 900;
}

/* 区段脚注 */
.section-note {
  margin-top: 24px;
  padding: 14px 18px;
  border-left: 3px solid var(--green);
  background: var(--mist);
  color: var(--blue-900);
  font-size: 14px;
  line-height: 1.6;
}

/* 业务板块（4 列概览图） */
.business-segments {
  background: var(--paper);
}

.business-segments .segments-figure {
  margin: clamp(28px, 5vw, 60px) 0 0;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
  text-align: center;
}

.business-segments .segments-figure img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

.business-segments .segments-figure figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

/* 工程流程 */
.engineering-flow {
  background: var(--white);
}

.engineering-flow .flow-figure {
  margin: clamp(28px, 5vw, 60px) auto 0;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-align: center;
  max-width: min(1080px, 100%);
}

.engineering-flow .flow-figure img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

.engineering-flow .flow-figure figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

/* 客户 logo 墙 */
.clients-section {
  background: var(--paper);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.client-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 88px;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.client-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--green);
}

.client-card img {
  display: block;
  max-width: 100%;
  max-height: 56px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(0.2);
  transition: filter 160ms ease;
}

.client-card:hover img {
  filter: grayscale(0);
}

.clients-note {
  margin-top: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* === 资料库增强结束 === */

/* === 多语言：语言切换器 + RTL === */

/* 语言切换器：下拉菜单样式（紧贴 brand 右侧、.site-nav 之前） */
.lang-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.lang-switcher-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 96px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--blue-900);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.lang-switcher-toggle:hover {
  border-color: var(--blue-700);
  color: var(--blue-700);
}

.lang-switcher-toggle:focus-visible {
  outline: 2px solid var(--blue-700);
  outline-offset: 2px;
}

.lang-switcher-icon {
  font-size: 14px;
  line-height: 1;
}

.lang-switcher-label {
  flex: 1 1 auto;
  text-align: start;
  white-space: nowrap;
}

.lang-switcher-caret {
  font-size: 11px;
  line-height: 1;
  color: var(--muted);
  transition: transform 160ms ease;
}

.lang-switcher[data-lang-switcher-state="open"] .lang-switcher-caret {
  transform: rotate(180deg);
}

/* 下拉面板 */
.lang-switcher-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  inset-inline-start: 0;
  z-index: 60;
  min-width: 220px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  max-height: 360px;
  overflow-y: auto;
}

.lang-switcher-dropdown[hidden] {
  display: none;
}

.lang-switcher-dropdown li {
  margin: 0;
  padding: 0;
}

.lang-switcher-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--blue-900);
  font-size: 14px;
  font-weight: 700;
  text-align: start;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.lang-switcher-option:hover {
  background: var(--mist);
}

.lang-switcher-option.is-active {
  background: var(--blue-700);
  color: var(--white);
}

.lang-switcher-option.is-active .lang-switcher-option-english {
  color: rgba(255, 255, 255, 0.78);
}

.lang-switcher-option-native {
  flex: 0 0 auto;
  font-weight: 800;
}

.lang-switcher-option-english {
  flex: 1 1 auto;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}

.lang-switcher-option-check {
  flex: 0 0 auto;
  width: 16px;
  text-align: end;
  font-size: 14px;
  opacity: 0;
}

.lang-switcher-option.is-active .lang-switcher-option-check {
  opacity: 1;
}

/* 让 .site-nav 推到 nav-toolbar 右侧 */
.nav-toolbar > .site-nav {
  margin-inline-start: auto;
  flex: 0 0 auto;
}

/* RTL（Arabic）适配 */
[dir="rtl"] {
  text-align: right;
}

[lang="ar"] body {
  font-family: "Noto Sans Arabic", "Tahoma", "Microsoft YaHei", Arial, sans-serif;
}

[lang="ru"] body {
  font-family: "Inter", "Noto Sans", "Microsoft YaHei", Arial, sans-serif;
}

/* hero 旁注（hero-aside）在 RTL 下从左侧开始 */
[dir="rtl"] .hero-aside {
  right: auto;
  left: clamp(20px, 5vw, 70px);
  justify-content: flex-start;
}

/* nav 下划线从右生长（同时作用于 link 与下拉 trigger） */
[dir="rtl"] .site-nav a::after,
[dir="rtl"] .site-nav .nav-link::after {
  transform-origin: right;
}

/* metric 分隔线镜像 */
[dir="rtl"] .metric {
  border-right: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}
[dir="rtl"] .metric:first-child {
  border-left: 0;
}
[dir="rtl"] .metric:last-child {
  border-right: 1px solid rgba(255, 255, 255, 0.16);
  border-left: 0;
}

/* 搜索清除按钮 */
[dir="rtl"] .search-clear {
  right: auto;
  left: 10px;
}

/* 滚动进度条 */
[dir="rtl"] [data-scroll-progress] {
  left: auto;
  right: 0;
  background: linear-gradient(270deg, var(--green), var(--orange));
}

/* 表单备注 / 区段脚注：绿条从右 */
[dir="rtl"] .form-note,
[dir="rtl"] .section-note {
  border-left: 0;
  border-right: 3px solid var(--green);
}

/* 对比表：行内 border 镜像 */
[dir="rtl"] .comparison-row > * {
  border-left: 0;
  border-right: 1px solid var(--line);
}
[dir="rtl"] .comparison-row > *:first-child {
  border-right: 0;
}

/* 案例对比行：响应式下的边距 */
[dir="rtl"] .case-comparison .comparison-row > * {
  border-right: 0;
}

/* RTL 下画廊左右箭头视觉翻转（不改变功能语义） */
[dir="rtl"] [data-gallery-prev],
[dir="rtl"] [data-gallery-next] {
  transform: scaleX(-1);
}

/* 移动端 */
@media (max-width: 860px) {
  .lang-switcher {
    margin-inline-end: 0;
  }

  .lang-switcher-toggle {
    min-width: 0;
    height: 32px;
    padding: 0 10px;
    font-size: 12px;
    gap: 4px;
  }

  .lang-switcher-icon {
    font-size: 12px;
  }

  /* 移动端隐藏 native 名，只显示地球 + caret，节省空间 */
  .lang-switcher-toggle .lang-switcher-label {
    display: none;
  }

  .lang-switcher-dropdown {
    min-width: 180px;
    inset-inline-start: auto;
    inset-inline-end: 0;
  }
}

/* === 多语言结束 === */

@media (max-width: 1120px) {
  .solution-grid,
  .service-steps,
  .download-grid,
  .comparison-grid,
  .tech-advantage-grid,
  .solution-taxonomy,
  .news-grid,
  .system-grid,
  .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .dark-card {
    grid-column: 1 / -1;
  }

  .comparison-row {
    grid-template-columns: 0.72fr 1fr 1.15fr 0.95fr;
  }

  .comparison-row > * {
    padding: 18px;
    font-size: 14px;
  }
}

@media (max-width: 860px) {
  .site-header {
    padding: 10px 14px;
  }

  .nav-toolbar {
    position: relative;
    min-height: 56px;
    padding: 8px 12px 8px 14px;
  }

  .brand img {
    width: 148px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 18px 22px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 20px 36px rgba(4, 28, 55, 0.12);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a,
  .site-nav .nav-link {
    padding: 13px 0;
  }

  .nav-dropdown-trigger {
    width: 100%;
    justify-content: space-between;
  }

  .nav-dropdown-trigger::after {
    display: none;
  }

  /* 移动端：下拉面板改为 inline 展开（不浮动），点击触发 */
  .nav-dropdown {
    position: static;
    min-width: 0;
    padding: 4px 0 4px 12px;
    background: transparent;
    border: 0;
    border-radius: 0;
    border-inline-start: 2px solid var(--mist);
    box-shadow: none;
    margin-inline-start: 8px;
    opacity: 1;
    visibility: visible;
    transform: none;
    /* 默认收起 */
    display: none;
  }

  .nav-item.is-open > .nav-dropdown {
    display: block;
  }

  .nav-dropdown-item {
    padding: 8px 10px;
  }

  .nav-dropdown-item-icon {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  .nav-dropdown-item-desc {
    display: none; /* 移动端隐藏描述节省空间 */
  }

  .nav-action {
    margin-top: 8px;
    padding: 12px 16px;
    text-align: center;
  }

  .hero {
    min-height: 86vh;
  }

  .hero-content {
    width: calc(100% - 36px);
    margin: 0 18px 132px;
  }

  .hero h1 {
    max-width: 9em;
  }

  .hero-aside {
    left: 18px;
    right: 18px;
    justify-content: flex-start;
  }

  .metric-band {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-grid,
  .tech-layout,
  .image-feature,
  .faq,
  .contact,
  .intent-section,
  .expo-feature,
  .materials-hero,
  .library-tools,
  .agent-layout,
  .purchase-strip {
    grid-template-columns: 1fr;
  }

  .materials-hero {
    min-height: 0;
    padding-top: 112px;
  }

  .featured-card {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .product-library {
    grid-template-columns: 1fr;
  }

  .product-main {
    min-height: 320px;
  }

  .product-thumbs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .image-feature {
    min-height: 0;
  }

  .project-media {
    grid-template-rows: auto auto;
    height: auto;
    min-height: 0;
  }

  .project-media > img,
  .project-media > video {
    height: 360px;
    min-height: 360px;
  }

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

  .project-thumbs img {
    height: 64px;
    min-height: 0;
  }

  .image-feature img,
  .contact-media img {
    min-height: 360px;
  }

  .project-thumbs img {
    min-height: 0;
  }

  .spec-table-wrap {
    overflow-x: auto;
  }

  .spec-table {
    min-width: 760px;
  }

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

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 620px) {
  .hero h1 {
    font-size: 42px;
  }

  .hero-lead {
    font-size: 18px;
  }

  .button {
    width: 100%;
  }

  .metric-band,
  .tech-points,
  .intent-grid,
  .solution-grid,
  .comparison-grid,
  .tech-advantage-grid,
  .solution-taxonomy,
  .news-grid,
  .case-grid,
  .service-steps,
  .download-grid,
  .system-grid,
  .support-grid,
  .agent-form,
  .materials-badges {
    grid-template-columns: 1fr;
  }

  .metric,
  .tech-points article,
  .solution-card,
  .case-card,
  .service-steps li,
  .library-card,
  .download-card {
    min-height: 0;
  }

  .spec-ribbon {
    position: static;
    grid-template-columns: 1fr;
    margin-top: 18px;
  }

  .product-stage .spec-ribbon {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 0;
  }

  .product-media-copy {
    display: grid;
    gap: 6px;
  }

  .product-media-copy strong {
    text-align: left;
  }

  .product-main {
    min-height: 280px;
  }

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

  .comparison-table {
    border: 0;
    background: transparent;
  }

  .comparison-head {
    display: none;
  }

  .comparison-row {
    grid-template-columns: 1fr;
    gap: 0;
    margin-bottom: 12px;
    border: 1px solid var(--line);
    background: var(--white);
  }

  .comparison-row > * {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 16px 18px;
  }

  .comparison-row > *:first-child {
    border-top: 0;
  }

  .comparison-row strong {
    background: rgba(0, 168, 112, 0.08);
  }

  .comparison-row p:nth-child(2)::before,
  .comparison-row p:nth-child(3)::before,
  .comparison-row p:nth-child(4)::before {
    display: block;
    margin-bottom: 6px;
    color: var(--green);
    font-size: 12px;
    font-weight: 900;
  }

  .comparison-row p:nth-child(2)::before {
    content: "传统喷淋";
  }

  .comparison-row p:nth-child(3)::before {
    content: "天来离心雾化";
  }

  .comparison-row p:nth-child(4)::before {
    content: "技术结果";
  }

  .tech-advantage-grid article {
    min-height: 0;
  }

  /* === 资料库增强（移动端） === */
  .video-feature {
    grid-template-columns: 1fr;
  }

  .site-nav {
    max-height: 0;
    padding: 0 18px;
    overflow: hidden;
    transition: max-height 220ms ease, padding 220ms ease;
  }

  .site-nav.is-open {
    max-height: 480px;
    padding: 10px 18px 22px;
  }

  .nav-toggle span {
    transition: transform 180ms ease;
  }

  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.is-open span:nth-child(2) {
    transform: translateY(-7px) rotate(-45deg);
  }

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

  .gallery-controls {
    justify-content: center;
  }

  .client-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .business-segments .segments-figure,
  .engineering-flow .flow-figure {
    padding: 16px;
  }
  /* === 资料库增强（移动端）结束 === */
}