/* ============================================================
   来因科技 · 全站样式
   设计语言：浅色精密科技风（Light Precision-Tech）
   —— 发丝边框 / 蓝图网格 / 玻璃拟态 / 取景框角标 / 等宽数据标签
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 文字 */
  --ink: #071a2c;
  --ink-2: #334c66;
  --ink-soft: #334c66;      /* 兼容旧变量名 */
  --ink-3: #6a849d;
  --muted: #6a849d;         /* 兼容旧变量名 */

  /* 线与面 */
  --line: #d0e0ee;
  --line-2: #b8d2e7;
  --surface: #ffffff;
  --surface-2: #eaf3fb;
  --surface-3: #deedf9;
  --grid-line: rgba(20, 97, 159, .05);
  --grid-line-2: rgba(20, 97, 159, .085);

  /* 主色（浅蓝基调） */
  --brand-950: #041e36;
  --brand-900: #09304f;
  --brand-800: #0e4776;
  --brand-700: #14619f;
  --brand-600: #1c76ba;
  --brand-500: #3b93dc;
  --brand-200: #b9d9f2;
  --brand-100: #d3e8fa;
  --brand-50: #e0effc;
  --cyan: #159bb8;
  --amber: #f59e0b;
  --amber-dark: #b45309;

  /* 兼容旧变量名（老 HTML 里引用过） */
  --bg: #ffffff;
  --bg-soft: #eaf3fb;

  /* 形状与阴影 */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(9, 48, 79, .04), 0 10px 30px -16px rgba(9, 48, 79, .14);
  --shadow-lg: 0 2px 6px rgba(9, 48, 79, .05), 0 28px 60px -28px rgba(9, 48, 79, .28);
  --shadow-1: var(--shadow);
  --shadow-2: var(--shadow-lg);

  --ease: cubic-bezier(.22, 1, .36, 1);
  --max: 1200px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
  background-color: #f2f8fd;
  /* 蓝图网格底纹（固定不随滚动） */
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.015em;
}
p { margin: 0; }
a { color: var(--brand-700); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--brand-600); }
img { max-width: 100%; height: auto; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
svg { display: block; }

:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 行内图标（替换 emoji） */
.i {
  width: 1.05em; height: 1.05em;
  display: inline-block;
  vertical-align: -.16em;
  margin-right: .45em;
  color: var(--brand-600);
  flex: 0 0 auto;
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 200;
  height: 2px; width: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 55%, var(--cyan));
  transition: transform .1s linear;
  pointer-events: none;
}

/* 回到顶部 */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 120;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: rgba(255, 255, 255, .82);
  -webkit-backdrop-filter: blur(12px) saturate(1.6);
  backdrop-filter: blur(12px) saturate(1.6);
  color: var(--brand-700);
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, border-color .2s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--brand-500); }
.to-top svg { width: 18px; height: 18px; }

/* ---------- 3. 顶部信息条 ---------- */
.topbar {
  position: relative; z-index: 60;
  background: linear-gradient(90deg, var(--surface-3), #eaf4fc 60%, var(--surface-3));
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: .01em;
}
.topbar .container {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 40px; flex-wrap: wrap;
}
.topbar span { display: inline-flex; align-items: center; }
.topbar b { color: var(--brand-800); font-weight: 700; }
.topbar a { color: var(--brand-800); font-variant-numeric: tabular-nums; }

/* ---------- 4. 页头与导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .74);
  -webkit-backdrop-filter: blur(16px) saturate(1.7);
  backdrop-filter: blur(16px) saturate(1.7);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}
.header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 12px 28px -22px rgba(9, 48, 79, .5);
  background: rgba(255, 255, 255, .88);
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; min-height: 72px;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo-img { height: 40px; width: auto; }
.logo-text .cn {
  font-size: 17px; font-weight: 800; color: var(--ink);
  letter-spacing: .04em; line-height: 1.3;
}
.logo-text .en {
  font-family: var(--mono);
  font-size: 9.5px; color: var(--ink-3);
  letter-spacing: .1em; text-transform: uppercase; line-height: 1.4;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav > a, .nav-link {
  position: relative;
  display: inline-flex; align-items: center; gap: 5px;
  padding: 9px 14px;
  font-size: 14.5px; font-weight: 500;
  color: var(--ink-2);
  border-radius: 9px;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav > a::after, .nav-link::after {
  content: "";
  position: absolute; left: 14px; right: 14px; bottom: 3px;
  height: 1.5px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-600), var(--cyan));
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .32s var(--ease);
}
.nav > a:hover, .nav-link:hover { color: var(--ink); background: rgba(28, 118, 186, .06); }
.nav > a.active, .nav-link.active { color: var(--brand-800); font-weight: 600; }
.nav > a.active::after, .nav-link.active::after { transform: scaleX(1); }
.nav > a.header-cta {
  margin-left: 10px; padding: 10px 18px;
  color: #fff; font-weight: 600;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
  box-shadow: 0 8px 20px -12px rgba(20, 97, 159, .9);
}
.nav > a.header-cta::after { display: none; }
.nav > a.header-cta:hover { filter: brightness(1.06); color: #fff; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line-2); border-radius: 11px;
  background: rgba(255, 255, 255, .8);
  color: var(--ink);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--brand-500); }
.nav-toggle span {
  position: relative; display: block;
  width: 17px; height: 1.5px; border-radius: 2px; background: currentColor;
  transition: transform .3s var(--ease), opacity .2s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0;
  width: 17px; height: 1.5px; border-radius: 2px; background: currentColor;
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.nav-toggle span::before { top: -5.5px; }
.nav-toggle span::after { top: 5.5px; }
body.nav-open .nav-toggle span { transform: rotate(45deg); }
body.nav-open .nav-toggle span::before { top: 0; transform: rotate(-90deg); }
body.nav-open .nav-toggle span::after { top: 0; opacity: 0; }

/* ---------- 4b. 产品中心下拉大面板（Mega Menu） ---------- */
.nav-item { position: relative; }
/* 桥接 hover 间隙：鼠标从「产品中心」移向面板途中不会闪断 */
.nav-item::after {
  content: "";
  position: absolute;
  left: -8px; right: -8px; top: 100%;
  height: 14px;
}
.nav-link .caret {
  width: 10px; height: 10px;
  opacity: .7;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-item:hover .nav-link .caret,
.nav-item:focus-within .nav-link .caret,
.nav-item.open .nav-link .caret { transform: rotate(180deg); opacity: 1; }

.nav-drop {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  width: min(830px, calc(100vw - 40px));
  z-index: 92;
  opacity: 0; visibility: hidden;
  transform: translate(-50%, 10px);
  pointer-events: none;
  transition: opacity .26s var(--ease), transform .36s var(--ease), visibility .36s;
}
.nav-drop::before {
  content: "";
  position: absolute; top: -6px; left: 50%;
  width: 11px; height: 11px; margin-left: -5.5px;
  background: #ffffff;
  border-left: 1px solid var(--line-2);
  border-top: 1px solid var(--line-2);
  border-radius: 2px 0 0 0;
  transform: rotate(45deg);
}
.nav-item:hover .nav-drop,
.nav-item:focus-within .nav-drop,
.nav-item.open .nav-drop {
  opacity: 1; visibility: visible;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.nav-drop-inner {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px 6px;
  padding: 18px 18px 14px;
  /* 纯白不透明：导航面板内容密集，避免下层大字透光影响阅读 */
  background: #ffffff;
  border: 1px solid var(--line-2);
  border-radius: 18px;
  box-shadow: 0 34px 74px -32px rgba(9, 48, 79, .46),
              0 2px 8px rgba(9, 48, 79, .06);
  overflow: hidden;
}
/* 顶部一道品牌渐变线 */
.nav-drop-inner::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 46%, var(--cyan) 74%, transparent);
}

.drop-col {
  padding: 10px 12px 11px;
  border-radius: 12px;
  transition: background .22s var(--ease);
}
.drop-col:hover { background: var(--surface-2); }

.drop-head { display: block; margin-bottom: 8px; }
.drop-idx {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px; letter-spacing: .14em;
  color: var(--brand-500);
  line-height: 1.6;
}
.drop-title {
  display: block;
  font-size: 14.5px; font-weight: 700;
  color: var(--ink);
  letter-spacing: -.012em;
  line-height: 1.5;
}
.drop-head:hover .drop-title { color: var(--brand-700); }
.drop-en {
  display: block;
  font-family: var(--mono);
  font-size: 9px; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 1px;
}

.drop-col ul li a {
  position: relative;
  display: block;
  padding: 5px 8px 5px 14px;
  font-size: 13.2px;
  color: var(--ink-2);
  border-radius: 7px;
  transition: color .18s var(--ease), background .18s var(--ease), padding-left .22s var(--ease);
}
.drop-col ul li a::before {
  content: "";
  position: absolute; left: 4px; top: 50%;
  width: 4px; height: 4px; margin-top: -2px;
  border-radius: 50%;
  background: var(--line-2);
  transition: background .18s var(--ease), transform .18s var(--ease);
}
.drop-col ul li a:hover {
  color: var(--brand-700);
  background: rgba(28, 118, 186, .075);
  padding-left: 17px;
}
.drop-col ul li a:hover::before { background: var(--brand-600); transform: scale(1.4); }

.drop-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px;
  grid-column: 1 / -1;
  margin: 10px -18px -14px;
  padding: 11px 20px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface-2), #e6f2fc);
  font-size: 12.4px;
  color: var(--ink-3);
}
.drop-foot b { color: var(--brand-800); font-variant-numeric: tabular-nums; font-weight: 700; }
.drop-foot a { font-weight: 600; color: var(--brand-700); display: inline-flex; align-items: center; gap: 4px; }
.drop-foot a:hover { color: var(--brand-600); }

/* ---------- 5. 按钮 ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px;
  font-family: inherit; font-size: 15px; font-weight: 600;
  letter-spacing: .01em;
  border: 1px solid var(--line-2);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              border-color .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); border-color: var(--brand-500); color: var(--ink); }
.btn:active { transform: translateY(0); }

/* 光泽扫过 */
.btn::before {
  content: "";
  position: absolute; top: 0; bottom: 0; left: -60%; width: 45%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .55), transparent);
  transform: skewX(-18deg);
  opacity: 0;
  transition: opacity .2s;
}
.btn:hover::before { opacity: 1; animation: sweep .8s var(--ease); }
@keyframes sweep {
  from { left: -60%; }
  to { left: 115%; }
}

.btn-primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
  color: #fff;
  box-shadow: 0 10px 26px -14px rgba(14, 71, 118, .95), inset 0 1px 0 rgba(255, 255, 255, .22);
}
.btn-primary:hover { color: #fff; box-shadow: 0 16px 34px -14px rgba(14, 71, 118, 1); }

.btn-amber {
  border-color: transparent;
  background: linear-gradient(135deg, #ffb63d, var(--amber));
  color: #40260a;
  box-shadow: 0 10px 26px -14px rgba(217, 119, 6, .95), inset 0 1px 0 rgba(255, 255, 255, .4);
}
.btn-amber:hover { color: #40260a; }

.btn-ghost {
  background: rgba(255, 255, 255, .7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-color: var(--line-2);
  color: var(--brand-800);
}
.btn-ghost:hover { background: var(--surface); border-color: var(--brand-500); color: var(--brand-800); }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 68px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 460px at 12% -10%, rgba(59, 147, 220, .20), transparent 62%),
    radial-gradient(760px 420px at 88% 6%, rgba(21, 155, 184, .13), transparent 64%),
    linear-gradient(180deg, #ffffff 0%, #eaf4fc 100%);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-2) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: radial-gradient(ellipse 78% 78% at 50% 40%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse 78% 78% at 50% 40%, #000 20%, transparent 78%);
  pointer-events: none;
}
.hero > .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 52px;
  align-items: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px 7px 11px;
  font-family: var(--mono);
  font-size: 11.5px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--brand-800);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--brand-200);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.hero-badge::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(21, 155, 184, .18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(21, 155, 184, .18); }
  50% { box-shadow: 0 0 0 7px rgba(21, 155, 184, .04); }
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(30px, 4.1vw, 48px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.025em;
}
.hero h1 em {
  position: relative;
  font-style: normal;
  background: linear-gradient(100deg, var(--brand-700), var(--brand-500) 52%, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero h1 em::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -.14em;
  height: 7px;
  background: linear-gradient(90deg, rgba(59, 147, 220, .30), rgba(21, 155, 184, .05));
  border-radius: 3px;
  z-index: -1;
}

.hero .lead {
  margin-top: 22px;
  max-width: 33em;
  font-size: 16.5px;
  line-height: 1.92;
  color: var(--ink-2);
}

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

/* Hero 右侧数据面板 */
.hero-visual { position: relative; }
.hero-panel {
  position: relative;
  background: rgba(255, 255, 255, .82);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  backdrop-filter: blur(18px) saturate(1.6);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-panel::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(320px 200px at var(--mx, 50%) var(--my, 0%), rgba(59, 147, 220, .16), transparent 70%);
  opacity: 0; transition: opacity .4s var(--ease);
  pointer-events: none;
}
.hero-panel:hover::after { opacity: 1; }

.hero-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(238, 246, 252, .7);
}
.hero-panel-head .t {
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-2);
}
.hero-panel-head .s {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10.5px;
  color: #159bb8; letter-spacing: .08em;
}
.hero-panel-head .s::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: #159bb8;
  box-shadow: 0 0 0 3px rgba(21, 155, 184, .16);
}
.hero-panel svg { width: 100%; height: auto; }

.hero-chips {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 16px;
}
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  background: rgba(255, 255, 255, .8);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  box-shadow: 0 8px 20px -16px rgba(9, 48, 79, .7);
}
.chip .i { margin: 0; }

/* 取景框角标 */
.framed::before, .framed::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  pointer-events: none;
  opacity: .55;
  transition: opacity .35s var(--ease), width .35s var(--ease), height .35s var(--ease);
}
.framed::before {
  top: 10px; left: 10px;
  border-top: 1.5px solid var(--brand-500);
  border-left: 1.5px solid var(--brand-500);
  border-top-left-radius: 6px;
}
.framed::after {
  bottom: 10px; right: 10px;
  border-bottom: 1.5px solid var(--brand-500);
  border-right: 1.5px solid var(--brand-500);
  border-bottom-right-radius: 6px;
}
.framed:hover::before, .framed:hover::after { opacity: 1; width: 24px; height: 24px; }

/* ---------- 7. 数据统计条 ---------- */
.stats { position: relative; margin-top: -30px; z-index: 5; }
.stats-card {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(255, 255, 255, .9);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  backdrop-filter: blur(16px) saturate(1.6);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.stats-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 50%, var(--cyan) 78%, transparent);
}
.stat {
  padding: 30px 24px;
  text-align: center;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: none; }
.stat .num {
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(160deg, var(--brand-800), var(--brand-600) 60%, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat .num small {
  font-size: .44em; font-weight: 700; letter-spacing: 0;
  margin-left: 3px;
}
.stat .label {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .1em;
  color: var(--ink-3);
}

/* ---------- 8. 区块通用 ---------- */
.section { position: relative; padding: 92px 0; counter-increment: sec; }
.section.alt {
  background: linear-gradient(180deg, rgba(226, 240, 252, .82), rgba(241, 248, 253, .6));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head .kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--brand-700);
}
.section-head .kicker::before {
  content: counter(sec, decimal-leading-zero);
  padding: 3px 7px;
  font-size: 10px;
  color: var(--brand-800);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  border-radius: 5px;
  letter-spacing: .04em;
}
.section-head h2 {
  margin-top: 16px;
  font-size: clamp(23px, 2.7vw, 34px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.3;
}
.section-head p { margin-top: 14px; font-size: 15.5px; color: var(--ink-3); line-height: 1.85; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .kicker { justify-content: center; }

/* ---------- 9. 产品体系卡 ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cat-card {
  position: relative;
  display: flex; flex-direction: column;
  padding: 28px 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(9, 48, 79, .03);
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.cat-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-600), var(--cyan));
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .45s var(--ease);
}
.cat-card::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(260px 180px at var(--mx, 50%) var(--my, 0%), rgba(59, 147, 220, .10), transparent 70%);
  opacity: 0; transition: opacity .4s var(--ease);
  pointer-events: none;
}
.cat-card:hover {
  transform: translateY(-5px);
  border-color: var(--brand-200);
  box-shadow: var(--shadow-lg);
}
.cat-card:hover::before { transform: scaleX(1); }
.cat-card:hover::after { opacity: 1; }

.cat-icon {
  position: relative; z-index: 1;
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--brand-200);
  border-radius: 14px;
  background: linear-gradient(150deg, var(--brand-50), #ffffff);
  color: var(--brand-600);
  transition: transform .4s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.cat-icon svg { width: 26px; height: 26px; }
.cat-card:hover .cat-icon {
  transform: translateY(-2px) scale(1.04);
  border-color: var(--brand-500);
  color: var(--brand-700);
}
.cat-card h3 { position: relative; z-index: 1; margin-top: 20px; font-size: 18px; font-weight: 700; }
.cat-card p { position: relative; z-index: 1; margin-top: 10px; font-size: 14.5px; line-height: 1.85; color: var(--ink-2); }

.tags { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tags span {
  font-size: 12px;
  padding: 4px 10px;
  color: var(--brand-800);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: 6px;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}
.cat-card:hover .tags span { background: var(--brand-100); border-color: var(--brand-200); }
.tags a { display: inline-block; }

.more {
  position: relative; z-index: 1;
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: auto; padding-top: 20px;
  font-size: 14px; font-weight: 600;
  color: var(--brand-700);
}
.more::after {
  content: "";
  width: 0; height: 1.5px; border-radius: 2px;
  background: currentColor;
  transition: width .3s var(--ease);
}
.cat-card:hover .more::after { width: 18px; }

/* ---------- 10. 产品卡 ---------- */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.prod-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(9, 48, 79, .03);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.prod-card:hover {
  transform: translateY(-5px);
  border-color: var(--brand-200);
  box-shadow: var(--shadow-lg);
}
.prod-thumb {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(var(--grid-line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-2) 1px, transparent 1px),
    linear-gradient(160deg, #eff7fd, #e0effc);
  background-size: 22px 22px, 22px 22px, 100% 100%;
  border-bottom: 1px solid var(--line);
  color: var(--brand-600);
  overflow: hidden;
}
.prod-thumb::after {
  content: "";
  position: absolute; top: 0; left: -40%; width: 30%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .85), transparent);
  transform: skewX(-16deg);
  transition: left .7s var(--ease);
}
.prod-card:hover .prod-thumb::after { left: 130%; }
.prod-thumb svg {
  width: 52px; height: 52px;
  transition: transform .4s var(--ease);
}
.prod-card:hover .prod-thumb svg { transform: scale(1.08); }

/* 产品实拍图（由后台上传后自动替换掉默认图标） */
.prod-thumb.has-photo::after { display: none; }
.prod-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s var(--ease);
}
.prod-card:hover .prod-thumb img { transform: scale(1.05); }

.prod-body { display: flex; flex-direction: column; flex: 1; padding: 20px 20px 22px; }
.prod-body .model {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 10.5px; font-weight: 600;
  letter-spacing: .09em;
  padding: 3px 9px;
  color: var(--brand-800);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: 5px;
}
.prod-body h3 { margin-top: 12px; font-size: 16px; font-weight: 700; line-height: 1.45; }
.prod-body p { margin-top: 9px; font-size: 13.8px; line-height: 1.8; color: var(--ink-3); }
.prod-body .link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: auto; padding-top: 16px;
  font-size: 13.5px; font-weight: 600; color: var(--brand-700);
}
.prod-body .link::after {
  content: "";
  width: 0; height: 1.5px; border-radius: 2px; background: currentColor;
  transition: width .3s var(--ease);
}
.prod-card:hover .prod-body .link::after { width: 16px; }

/* ---------- 11. 核心优势 / 资质数字块 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.adv {
  position: relative;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.adv:hover { transform: translateY(-4px); border-color: var(--brand-200); box-shadow: var(--shadow); }
.adv .no {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 34px; height: 30px;
  padding: 0 8px;
  font-family: var(--mono);
  font-size: 13px; font-weight: 600;
  letter-spacing: .04em;
  color: var(--brand-800);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: 8px;
}
.adv .no svg { width: 20px; height: 20px; margin: 0; color: var(--brand-600); }
.adv h3 { margin-top: 18px; font-size: 17px; font-weight: 700; }
.adv p { margin-top: 10px; font-size: 14.2px; line-height: 1.85; color: var(--ink-2); }

/* ---------- 12. 资质条 ---------- */
.certs {
  position: relative;
  background: rgba(255, 255, 255, .72);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}
.certs .container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.cert {
  display: flex; align-items: center; gap: 13px;
  padding: 24px 20px;
  border-right: 1px solid var(--line);
}
.cert:last-child { border-right: none; }
.c-ic {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--brand-200);
  border-radius: 12px;
  background: linear-gradient(150deg, var(--brand-50), #fff);
  color: var(--brand-600);
}
.c-ic .i, .c-ic svg { width: 21px; height: 21px; margin: 0; }
.cert h4 { font-size: 14.5px; font-weight: 700; line-height: 1.4; }
.cert p {
  margin-top: 3px;
  font-family: var(--mono);
  font-size: 10.5px; letter-spacing: .06em;
  color: var(--ink-3);
}

/* ---------- 13. 解决方案 / 企业文化 ---------- */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.sol {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.sol:hover { transform: translateY(-4px); border-color: var(--brand-200); box-shadow: var(--shadow); }
.sol .ic {
  flex: 0 0 auto;
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  border: 1px solid var(--brand-200);
  border-radius: 13px;
  background: linear-gradient(150deg, var(--brand-50), #fff);
  color: var(--brand-600);
}
.sol .ic svg, .sol .ic .i { width: 23px; height: 23px; margin: 0; }
.sol h3 { font-size: 16.5px; font-weight: 700; }
.sol p { margin-top: 7px; font-size: 14px; line-height: 1.8; color: var(--ink-2); }

/* ---------- 14. 技术洞察 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.news-card {
  position: relative;
  padding: 28px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.news-card:hover { transform: translateY(-4px); border-color: var(--brand-200); box-shadow: var(--shadow); }
.news-card time {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .1em;
  color: var(--ink-3);
}
.news-card h3 { margin-top: 14px; font-size: 16.5px; font-weight: 700; line-height: 1.55; }
.news-card p { margin-top: 12px; font-size: 14px; line-height: 1.85; color: var(--ink-2); }

/* ---------- 15. CTA 蓝图面板 ---------- */
.cta {
  position: relative;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap;
  padding: 46px 48px;
  background: linear-gradient(180deg, #ffffff 0%, #e6f2fc 100%);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-2) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: linear-gradient(100deg, #000 10%, transparent 62%);
  mask-image: linear-gradient(100deg, #000 10%, transparent 62%);
  pointer-events: none;
}
.cta::after {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 45%, var(--cyan) 70%, transparent);
}
.cta > * { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(21px, 2.4vw, 28px); font-weight: 800; letter-spacing: -.02em; }
.cta p { margin-top: 10px; font-size: 15px; color: var(--ink-2); }

/* ---------- 16. FAQ ---------- */
.faq-list { display: grid; gap: 12px; max-width: 900px; }
.faq-list details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.faq-list details:hover { border-color: var(--brand-200); }
.faq-list details[open] { border-color: var(--brand-200); box-shadow: var(--shadow); }
.faq-list summary {
  position: relative;
  display: flex; align-items: center; gap: 14px;
  padding: 20px 56px 20px 22px;
  font-size: 16px; font-weight: 600; color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color .25s var(--ease);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: "";
  flex: 0 0 auto;
  width: 22px; height: 22px;
  border-radius: 6px;
  border: 1px solid var(--brand-200);
  background: var(--brand-50) center / 10px 10px no-repeat;
  background-image: linear-gradient(var(--brand-700), var(--brand-700)),
                    linear-gradient(var(--brand-700), var(--brand-700));
  background-size: 10px 1.6px, 1.6px 10px;
  transition: transform .35s var(--ease), border-color .25s var(--ease);
}
.faq-list details[open] summary::before { transform: rotate(135deg); border-color: var(--brand-500); }
.faq-list summary:hover { color: var(--brand-800); }
.faq-list summary::after {
  content: "";
  position: absolute; right: 22px; top: 50%;
  width: 7px; height: 7px;
  border-right: 1.6px solid var(--ink-3);
  border-bottom: 1.6px solid var(--ink-3);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .35s var(--ease), border-color .25s var(--ease);
}
.faq-list details[open] summary::after { transform: translateY(-30%) rotate(-135deg); border-color: var(--brand-600); }
.faq-list .answer {
  max-height: 0; overflow: hidden; opacity: 0;
  padding: 0 22px 0 58px;
  font-size: 14.8px; line-height: 1.95; color: var(--ink-2);
  transition: max-height .45s var(--ease), opacity .3s var(--ease), padding .3s var(--ease);
}
.faq-list details[open] .answer { max-height: 520px; opacity: 1; padding: 0 22px 24px 58px; }

/* ---------- 17. 内页横幅 ---------- */
.page-banner {
  position: relative;
  padding: 60px 0 56px;
  background:
    radial-gradient(720px 340px at 18% -30%, rgba(59, 147, 220, .22), transparent 66%),
    radial-gradient(620px 300px at 86% 0%, rgba(21, 155, 184, .14), transparent 66%),
    linear-gradient(180deg, #ffffff, #ecf6fd);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-2) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 92%);
  mask-image: linear-gradient(180deg, #000, transparent 92%);
  pointer-events: none;
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 {
  font-size: clamp(25px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: -.022em;
}
.page-banner p { margin-top: 12px; font-size: 15.5px; color: var(--ink-2); }
.breadcrumb {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px; letter-spacing: .1em;
  color: var(--ink-3);
}
.breadcrumb a { color: var(--brand-700); }

/* ---------- 18. 发展历程 ---------- */
.timeline {
  position: relative;
  display: grid;
  gap: 0;
  padding-left: 30px;
}
.timeline::before {
  content: "";
  position: absolute; left: 5px; top: 10px; bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--brand-200), var(--brand-500) 30%, var(--brand-200));
}
.tl-item {
  position: relative;
  padding: 0 0 34px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute; left: -30px; top: 8px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--brand-600);
  box-shadow: 0 0 0 4px rgba(28, 118, 186, .12);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.tl-item:hover::before { transform: scale(1.15); box-shadow: 0 0 0 7px rgba(28, 118, 186, .14); }
.tl-item .year {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand-800);
  padding: 3px 9px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: 5px;
}
.tl-item h3 { margin-top: 12px; font-size: 17.5px; font-weight: 700; }
.tl-item p { margin-top: 8px; font-size: 14.5px; line-height: 1.85; color: var(--ink-2); max-width: 60em; }

/* ---------- 19. 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 44px;
  align-items: start;
}
.info-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 22px 22px;
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .3s var(--ease);
}
.info-card:hover { transform: translateY(-3px); border-color: var(--brand-200); box-shadow: var(--shadow); }
.info-card .ic {
  flex: 0 0 auto;
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  border: 1px solid var(--brand-200);
  border-radius: 13px;
  background: linear-gradient(150deg, var(--brand-50), #fff);
  color: var(--brand-600);
}
.info-card .ic svg, .info-card .ic .i { width: 23px; height: 23px; margin: 0; }
.info-card h3 { font-size: 16.5px; font-weight: 700; }
.info-card p { margin-top: 7px; font-size: 14.2px; line-height: 1.8; color: var(--ink-2); }
.info-card b { color: var(--ink); font-variant-numeric: tabular-nums; }

.form-box {
  position: relative;
  padding: 34px 32px 36px;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.form-box::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 50%, var(--cyan) 76%, transparent);
}
.form-box h3 { font-size: 21px; font-weight: 800; letter-spacing: -.02em; }
.form-box .tip { margin: 10px 0 22px; font-size: 14px; color: var(--ink-3); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label {
  display: block; margin-bottom: 7px;
  font-size: 13.5px; font-weight: 600; color: var(--ink-2);
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit; font-size: 14.5px; color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.field textarea { min-height: 118px; resize: vertical; line-height: 1.8; }
.field input::placeholder, .field textarea::placeholder { color: #98adc0; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  background: var(--surface);
  border-color: var(--brand-500);
  box-shadow: 0 0 0 4px rgba(59, 147, 220, .14);
}
.form-box .btn { width: 100%; margin-top: 8px; }

/* ---------- 20. 页脚 ---------- */
.footer {
  position: relative;
  padding: 60px 0 26px;
  background: linear-gradient(180deg, #eaf4fc, #e0effc);
  border-top: 1px solid var(--line);
  color: var(--ink-2);
}
.footer::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-500) 30%, var(--cyan) 55%, transparent);
  opacity: .5;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 36px;
}
.footer .logo-img { height: 40px; }
.footer .logo-text .cn { color: var(--ink); }
.footer .brand p { margin-top: 18px; font-size: 13.6px; line-height: 1.9; color: var(--ink-2); }
.footer h4 {
  font-size: 12px;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 16px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: var(--ink-2); transition: color .2s var(--ease), padding-left .25s var(--ease); }
.footer ul li a:hover { color: var(--brand-700); padding-left: 3px; }
.footer .contact p { font-size: 14px; line-height: 1.85; margin-bottom: 10px; color: var(--ink-2); }
.hotline { font-weight: 700; color: var(--brand-800); font-variant-numeric: tabular-nums; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  margin-top: 46px; padding-top: 22px;
  border-top: 1px solid var(--line-2);
  font-size: 12.8px;
  color: var(--ink-3);
}
.footer-bottom a { color: var(--ink-3); }
.footer-bottom a:hover { color: var(--brand-700); }

/* ---------- 21. 滚动揭示动画 ---------- */
.rv { opacity: 0; transform: translateY(16px); }
.rv.in {
  opacity: 1; transform: none;
  transition: opacity .72s var(--ease), transform .72s var(--ease);
}

/* Hero 入场 */
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
.hero-grid > * { animation: rise .85s var(--ease) both; }
.hero-grid > *:nth-child(2) { animation-delay: .12s; }
.hero-badge { animation-delay: 0s !important; }

/* ---------- 22. 响应式 ---------- */
@media (max-width: 1080px) {
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .certs .container { grid-template-columns: repeat(3, 1fr); }
  .cert:nth-child(3) { border-right: none; }
  .cert:nth-child(n+4) { border-top: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 520px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .sol-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-card { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }

  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 0; z-index: 95;
    flex-direction: column; justify-content: flex-start; gap: 6px;
    padding: 88px 32px 40px;
    background: rgba(255, 255, 255, .93);
    -webkit-backdrop-filter: blur(20px) saturate(1.7);
    backdrop-filter: blur(20px) saturate(1.7);
    opacity: 0; visibility: hidden; transform: translateY(-12px);
    transition: opacity .35s var(--ease), transform .35s var(--ease), visibility .35s;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  body.nav-open .nav { opacity: 1; visibility: visible; transform: none; }
  .nav > a, .nav-link {
    width: 100%; max-width: 420px;
    padding: 15px 18px;
    font-size: 17px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }
  .nav > a:nth-child(1) { transition-delay: .04s; }
  .nav > a:nth-child(2) { transition-delay: .08s; }
  .nav > a:nth-child(3) { transition-delay: .12s; }
  .nav > a:nth-child(4) { transition-delay: .16s; }
  .nav > a::after, .nav-link::after { display: none; }

  /* 移动端：下拉面板改为内联的分类网格（无 hover 可依赖） */
  .nav-item { position: static; width: 100%; max-width: 420px; }
  .nav-item::after { display: none; }
  .nav-link { justify-content: flex-start; }
  .nav-link .caret { margin-left: auto; width: 13px; height: 13px; }
  .nav-drop {
    position: static; left: auto; top: auto;
    width: 100%; max-width: 420px;
    transform: none; opacity: 1; visibility: visible;
    pointer-events: auto;
    transition: none;
  }
  .nav-drop::before { display: none; }
  .nav-drop-inner {
    grid-template-columns: 1fr 1fr;
    gap: 0 6px;
    padding: 6px 0 12px 16px;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .nav-drop-inner::before { display: none; }
  .drop-col { padding: 5px 6px; }
  .drop-col:hover { background: transparent; }
  .drop-col ul { display: none; }
  .drop-idx { display: none; }
  .drop-foot { display: none; }
  .nav > a.header-cta {
    margin: 18px 0 0;
    border-radius: 11px;
    border-bottom: none;
    text-align: center;
    justify-content: center;
  }
  .topbar .container { justify-content: center; text-align: center; min-height: auto; padding-top: 8px; padding-bottom: 8px; }
  .topbar span:first-child { display: none; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .section { padding: 64px 0; }
  .hero { padding: 52px 0 48px; }
  .prod-grid { grid-template-columns: 1fr 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .certs .container { grid-template-columns: 1fr; }
  .cert { border-right: none; border-top: 1px solid var(--line); }
  .cert:first-child { border-top: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cta { padding: 32px 24px; }
  .cta .btn { width: 100%; }
  .form-box { padding: 26px 20px 28px; }
  .page-banner { padding: 44px 0 40px; }
  .logo-text .en { display: none; }
  .logo-img { height: 34px; }
  .faq-list summary { padding: 17px 48px 17px 18px; font-size: 15px; gap: 10px; }
  .faq-list .answer, .faq-list details[open] .answer { padding-left: 18px; padding-right: 18px; }
  .to-top { right: 16px; bottom: 16px; }
  .timeline { padding-left: 26px; }
  .tl-item::before { left: -26px; }
}

/* ---------- 23. Hero 图表容器与补充 ---------- */
body { counter-reset: sec; }
.hero-chart { position: relative; padding: 20px 22px 6px; }
.hero-chart.framed::before { top: 8px; left: 8px; }
.hero-chart.framed::after { bottom: 8px; right: 8px; }
.hero-panel .hero-panel-head + .hero-chart { margin-top: 0; }

/* 章节标题编号：让每个 section 自带 01 / 02 序号 */
.section-head .kicker { white-space: nowrap; }

/* ---------- 24. 无障碍 / 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .rv { opacity: 1; transform: none; }
  .hero-grid > * { animation: none; }
}

/* ================= 产品详情页（product-NN.html） ================= */
.pd-model {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px; letter-spacing: .08em;
  color: var(--brand-800);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  border-radius: 6px;
  padding: 4px 10px;
}
.page-banner .pd-model { margin-bottom: 14px; }
.page-banner .pd-sub { margin-top: 10px; font-size: 15px; color: var(--ink-2); }
.pd-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}
.pd-media {
  position: relative;
  margin: 0;
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(560px 260px at 50% 0%, rgba(59, 148, 220, .12), transparent 70%),
    linear-gradient(180deg, #ffffff, #f2f9ff);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.pd-media::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.pd-media svg { position: relative; width: 110px; height: 110px; color: var(--brand-600); }
.pd-media.has-photo { background: #fff; }
.pd-media.has-photo::before { display: none; }
.pd-media img { position: relative; display: block; width: 100%; height: 100%; object-fit: contain; }
.pd-panel h2 { font-size: clamp(21px, 2.3vw, 28px); font-weight: 800; letter-spacing: -.02em; }
.pd-panel .pd-lead { margin-top: 14px; font-size: 15.5px; line-height: 1.9; color: var(--ink-2); }
.pd-features { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 13px; }
.pd-features li { position: relative; padding-left: 30px; font-size: 15px; line-height: 1.75; color: var(--ink-2); }
.pd-features li::before {
  content: ""; position: absolute; left: 0; top: .42em;
  width: 17px; height: 17px; border-radius: 50%;
  background: var(--brand-50); border: 1px solid var(--brand-200);
}
.pd-features li::after {
  content: ""; position: absolute; left: 5px; top: calc(.42em + 5px);
  width: 7px; height: 3.5px;
  border-left: 1.7px solid var(--brand-700); border-bottom: 1.7px solid var(--brand-700);
  transform: rotate(-45deg);
}
.pd-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.pd-intro p { margin: 0 0 18px; font-size: 15.5px; line-height: 2; color: var(--ink-2); }
.pd-intro p:last-child { margin-bottom: 0; }
.pd-specs-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); box-shadow: var(--shadow); }
.pd-specs { width: 100%; border-collapse: collapse; }
.pd-specs th, .pd-specs td { padding: 14px 18px; font-size: 14.5px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.pd-specs th { width: 30%; font-weight: 600; color: var(--ink); background: var(--surface-2); }
.pd-specs td { color: var(--ink-2); }
.pd-specs tr:last-child th, .pd-specs tr:last-child td { border-bottom: 0; }
.rel-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.rel-item {
  display: flex; align-items: center; gap: 12px;
  padding: 15px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.rel-item:hover { transform: translateY(-2px); border-color: var(--brand-500); box-shadow: var(--shadow); }
.rel-item svg { width: 26px; height: 26px; flex: 0 0 auto; color: var(--brand-600); }
.rel-item b { display: block; font-size: 13.5px; font-weight: 600; color: var(--ink); line-height: 1.4; }
.rel-item span { display: block; margin-top: 3px; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); letter-spacing: .06em; }
@media (max-width: 980px) {
  .pd-grid { grid-template-columns: 1fr; gap: 28px; }
  .rel-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .rel-grid { grid-template-columns: 1fr; }
  .pd-specs th { width: 38%; }
  .pd-actions .btn { flex: 1 1 100%; }
}
/* ================= /产品详情页 ================= */

/* ---------- 21b. 内页首部 · 信息中枢（products / about / contact） ---------- */
.page-banner--hub { padding: 50px 0 46px; }

.pb-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.26fr) minmax(0, 1fr);
  gap: 42px;
  align-items: stretch;
}
.pb-lead { min-width: 0; display: flex; flex-direction: column; }
.pb-side { min-width: 0; display: flex; flex-direction: column; }

.pb-kicker {
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 12px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  border-radius: 999px;
}

.pb-lead h1 { margin-top: 15px; }
.pb-lead > p { margin-top: 12px; font-size: 15.5px; line-height: 1.7; color: var(--ink-2); }
.pb-lead .breadcrumb { margin-top: 16px; margin-bottom: 26px; }

.pb-facts {
  display: flex; flex-wrap: wrap; gap: 38px;
  margin-top: auto; padding-top: 20px;
  border-top: 1px solid var(--line);
}
.pb-fact b { display: block; font-size: 27px; font-weight: 800; line-height: 1.05; letter-spacing: -.025em; color: var(--brand-700); }
.pb-fact span { display: block; margin-top: 6px; font-size: 12.5px; color: var(--ink-3); }

.pb-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); }
.pb-chips span {
  padding: 6px 14px;
  font-size: 12.5px; color: var(--brand-800);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--brand-200);
  border-radius: 999px;
}

.pb-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: auto; padding-top: 26px; }

.pb-cats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.pb-cats a {
  display: block;
  padding: 13px 15px;
  background: rgba(255, 255, 255, .86);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.pb-cats a:hover {
  transform: translateY(-2px);
  border-color: var(--brand-200);
  box-shadow: var(--shadow);
}
.pb-cats i { display: block; font-family: var(--mono); font-size: 11px; font-style: normal; letter-spacing: .12em; color: var(--brand-500); }
.pb-cats span { display: block; margin-top: 5px; font-size: 13.5px; font-weight: 600; line-height: 1.35; color: var(--ink); }

.pb-creds { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.pb-cred {
  padding: 15px;
  background: rgba(255, 255, 255, .86);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.pb-cred b { display: block; font-size: 13.5px; font-weight: 600; color: var(--ink); }
.pb-cred span { display: block; margin-top: 6px; font-size: 12px; line-height: 1.5; color: var(--ink-3); }

.pb-info {
  margin: auto 0;
  padding: 4px 20px;
  background: rgba(255, 255, 255, .9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.pb-info-row { display: flex; align-items: center; gap: 14px; padding: 15px 0; }
.pb-info-row + .pb-info-row { border-top: 1px solid var(--surface-2); }
.pb-info-ic {
  flex: none; width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
}
.pb-info-ic svg { width: 19px; height: 19px; }
.pb-info-row em { display: block; font-style: normal; font-size: 11.5px; letter-spacing: .04em; color: var(--ink-3); }
.pb-info-row b { display: block; margin-top: 3px; font-size: 14px; font-weight: 600; line-height: 1.45; color: var(--ink); }

.pb-note { margin-top: auto; padding-top: 11px; text-align: right; font-size: 12px; color: var(--ink-3); }

@media (max-width: 1000px) {
  .pb-grid { grid-template-columns: 1fr; gap: 30px; }
  .page-banner--hub { padding: 42px 0 38px; }
  .pb-lead .breadcrumb { margin-bottom: 22px; }
  .pb-info { margin: 0; }
}
@media (max-width: 560px) {
  .pb-facts { gap: 26px; }
  .pb-fact b { font-size: 22px; }
  .pb-cats span { font-size: 12.5px; }
  .pb-actions .btn { flex: 1 1 100%; }
  .pb-note { text-align: left; }
}

/* ===== ARTICLES: 文章资讯（新增栏目，勿手改） ===== */
/* 追加于 2026-09-24：文章资讯栏目（列表页 + 详情页 + 首页技术洞察改版）
   全部为新增规则，不改动任何既有选择器的语义。 */

/* ---------- 首页「技术洞察」卡片改为可点击带封面 ---------- */
.news-card { display: block; padding: 0; overflow: hidden; color: inherit; text-decoration: none; }
.news-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(160deg, #eff7fd, #e0effc);
  border-bottom: 1px solid var(--line);
}
.news-cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s var(--ease); }
.news-card:hover .news-cover img { transform: scale(1.05); }
.news-body { padding: 22px 24px 26px; }
.news-all { margin-top: 34px; text-align: center; }

/* ---------- 列表页卡片 ---------- */
.art-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.art-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  color: inherit; text-decoration: none;
  box-shadow: 0 1px 2px rgba(9, 48, 79, .03);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
}
.art-card:hover { transform: translateY(-5px); border-color: var(--brand-200); box-shadow: var(--shadow-lg); }
.art-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(160deg, #eff7fd, #e0effc);
  border-bottom: 1px solid var(--line);
}
.art-cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s var(--ease); }
.art-card:hover .art-cover img { transform: scale(1.05); }
.art-tag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 3px 10px;
  font-family: var(--mono);
  font-size: 10.5px; font-weight: 500; letter-spacing: .08em;
  color: #fff;
  background: rgba(9, 48, 79, .78);
  border-radius: 5px;
}
.art-body-card { display: flex; flex-direction: column; flex: 1; padding: 22px 22px 24px; }
.art-body-card time {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .1em;
  color: var(--ink-3);
}
.art-body-card h3 { margin-top: 12px; font-size: 16.5px; font-weight: 700; line-height: 1.5; }
.art-body-card p { margin-top: 11px; font-size: 13.8px; line-height: 1.85; color: var(--ink-3); }
.art-more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: auto; padding-top: 16px;
  font-size: 13.5px; font-weight: 600; color: var(--brand-700);
}
.art-more::after {
  content: "";
  width: 0; height: 1.5px; border-radius: 2px;
  background: currentColor;
  transition: width .3s var(--ease);
}
.art-card:hover .art-more::after { width: 16px; }

/* ---------- 详情页 ---------- */
.pb-cover {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(160deg, #eff7fd, #e0effc);
  box-shadow: var(--shadow);
}
.pb-cover img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.pb-side .pb-note { margin-top: 14px; }

.art-wrap { max-width: 860px; margin: 0 auto; }
.art-content h2 {
  margin: 42px 0 14px;
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 800; letter-spacing: -.01em; line-height: 1.45;
}
.art-content h2:first-child { margin-top: 0; }
.art-content p { margin: 0 0 18px; font-size: 15.8px; line-height: 2.05; color: var(--ink-2); }
.art-content ul { margin: 0 0 20px; padding: 0; list-style: none; }
.art-content ul li {
  position: relative;
  padding-left: 22px; margin-bottom: 10px;
  font-size: 15.5px; line-height: 2; color: var(--ink-2);
}
.art-content ul li::before {
  content: ""; position: absolute; left: 4px; top: 14px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand-500);
}
.art-content strong, .art-content b { color: var(--ink); font-weight: 700; }
.art-note {
  margin: 30px 0 0; padding: 20px 22px;
  font-size: 14.6px; line-height: 1.95; color: var(--ink-2);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius);
}
.art-note b { color: var(--brand-800); }
.art-pager {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 44px; padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.art-pager a { font-weight: 600; color: var(--brand-700); }
.art-pager span { color: var(--ink-3); }

/* ---------- 表格（选型对照表，利于 AI 摘取） ---------- */
.art-table { margin: 4px 0 26px; overflow-x: auto; }
.art-table table { width: 100%; border-collapse: collapse; font-size: 14.8px; }
.art-table th, .art-table td {
  padding: 12px 14px; text-align: left; vertical-align: top;
  border: 1px solid var(--line);
}
.art-table th { background: var(--brand-50); color: var(--ink); font-weight: 700; white-space: nowrap; }
.art-table td { color: var(--ink-2); line-height: 1.8; }

/* ---------- FAQ 问答对（多平台 + AI 收录） ---------- */
.art-faq { margin: 6px 0 8px; }
.art-faq-item {
  padding: 16px 20px; margin-bottom: 14px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius);
}
.art-faq-q { margin: 0 0 8px; font-size: 15.4px; line-height: 1.7; }
.art-faq-a { margin: 0; font-size: 14.6px; line-height: 1.95; color: var(--ink-2); }

/* ---------- 正文插图（多平台 + AI 收录，2026-10-10 新增） ---------- */
.art-figure { margin: 28px 0 30px; text-align: center; }
.art-figure img {
  display: block; margin: 0 auto; max-width: 100%; height: auto;
  border: 1px solid var(--brand-100); border-radius: var(--radius);
  background: #fff;
}
.art-figure--shot img { width: 400px; }
.art-figure--wide img { width: 640px; }
.art-figure figcaption {
  margin: 10px auto 0; max-width: 640px;
  font-size: 13px; line-height: 1.7; color: var(--ink-3);
}
@media (max-width: 640px) {
  .art-figure--shot img, .art-figure--wide img { width: 100%; }
}

/* ---------- 文章底部相关产品 ---------- */
.art-prods { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.art-prods--3 { grid-template-columns: repeat(3, 1fr); }
.art-prods--2 { grid-template-columns: repeat(2, 1fr); max-width: 820px; }
.art-prods--1 { grid-template-columns: 1fr; max-width: 420px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .art-prods { grid-template-columns: repeat(3, 1fr); }
  .art-prods--3 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 980px) {
  .art-grid { grid-template-columns: repeat(2, 1fr); }
  .art-prods, .art-prods--2, .art-prods--1 { grid-template-columns: repeat(2, 1fr); max-width: none; }
}
@media (max-width: 640px) {
  .art-grid, .art-prods, .art-prods--2, .art-prods--1, .art-prods--3 {
    grid-template-columns: 1fr; max-width: none;
  }
  .art-content p { font-size: 15.2px; }
  .art-pager { flex-direction: column; gap: 10px; }
}
/* ===== /ARTICLES ===== */




/* ===== PRODUCT FAQ: 产品页常见问题（新增，勿手改） ===== */
/* 追加于 2026-10-09：产品详情页「常见问题（FAQ）」区 + FAQPage 结构化数据。
   全部为新增规则，不改动任何既有选择器的语义。 */
.pd-faq { display: grid; gap: 14px; max-width: 900px; margin-top: 6px; }
.pd-faq-item {
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(9, 48, 79, .03);
}
.pd-faq-q { margin: 0 0 9px; font-size: 15.6px; line-height: 1.7; color: var(--ink); }
.pd-faq-q strong { font-weight: 700; }
.pd-faq-a { margin: 0; font-size: 14.8px; line-height: 1.95; color: var(--ink-2); }
@media (max-width: 640px) { .pd-faq-item { padding: 17px 18px; } .pd-faq-q { font-size: 15px; } }
/* ===== /PRODUCT FAQ ===== */