/* ==========================================================================
   嘉兴市黑光马良科技有限公司 · 官网样式
   深色科技风：品牌色取自「黑光（暗夜青）」与「红外（暖橙）」
   ========================================================================== */

:root {
  --bg: #05070d;
  --bg-1: #080b14;
  --bg-2: #0b1120;
  --panel: rgba(255, 255, 255, .038);
  --panel-2: rgba(255, 255, 255, .065);
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .17);

  --text: #e9eef7;
  --text-2: #a6b3c7;
  --text-3: #6d7b92;

  --cyan: #2fe3c4;
  --blue: #4d8cff;
  --iris: #7c5cff;
  --ir: #ff6a3d;

  --grad: linear-gradient(115deg, #2fe3c4 0%, #4d8cff 62%, #7c5cff 100%);

  --radius: 16px;
  --radius-sm: 11px;
  --maxw: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
          "Source Han Sans SC", system-ui, -apple-system, sans-serif;
}

/* ---------------------------------------------------------------- 基础 */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 650; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

::selection { background: rgba(47, 227, 196, .28); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #05070d; }
::-webkit-scrollbar-thumb { background: #1d2740; border-radius: 8px; border: 2px solid #05070d; }
::-webkit-scrollbar-thumb:hover { background: #2b3855; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

.mono { font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace; letter-spacing: .02em; }

/* 图标 */
.ic { width: 18px; height: 18px; flex: none; }
.ic-lg { width: 24px; height: 24px; flex: none; }
.ic-xs { width: 14px; height: 14px; flex: none; }
.ic-flip { transform: scaleX(-1); }

/* ---------------------------------------------------------------- 背景层 */

.bg-layer { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }

.glow { position: absolute; border-radius: 50%; filter: blur(120px); opacity: .5; }
.glow-a {
  width: 780px; height: 780px; top: -300px; left: -180px;
  background: radial-gradient(circle, rgba(47, 227, 196, .35), transparent 68%);
}
.glow-b {
  width: 900px; height: 900px; top: 12%; right: -360px;
  background: radial-gradient(circle, rgba(77, 140, 255, .3), transparent 68%);
}

.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .028) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
}

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px;
  border: 1px solid transparent; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .02em;
  cursor: pointer; white-space: nowrap;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
              background .28s var(--ease), border-color .28s var(--ease), color .28s var(--ease);
}
.btn .ic { transition: transform .28s var(--ease); }
.btn:hover .ic { transform: translateX(3px); }

.btn-primary {
  background: var(--grad); color: #04121a;
  box-shadow: 0 10px 30px -12px rgba(47, 227, 196, .55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -14px rgba(47, 227, 196, .7); }

.btn-ghost {
  border-color: var(--line-2); color: var(--text); background: rgba(255, 255, 255, .02);
}
.btn-ghost:hover { border-color: rgba(47, 227, 196, .55); background: rgba(47, 227, 196, .07); color: #fff; transform: translateY(-2px); }

.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 15px 32px; font-size: 16px; }

.link-more {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 26px; font-weight: 600; color: var(--cyan);
}
.link-more .ic { transition: transform .28s var(--ease); }
.link-more:hover { color: #6ff3dc; }
.link-more:hover .ic { transform: translateX(4px); }

/* ---------------------------------------------------------------- 头部导航 */

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(6, 9, 16, .82);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
}

.header-inner { display: flex; align-items: center; gap: 28px; height: 74px; }

.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand-mark { width: 38px; height: 38px; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 18px; font-weight: 700; letter-spacing: .06em; }
.brand-text em {
  font-style: normal; font-size: 9.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-3);
}

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link {
  position: relative; padding: 9px 15px; border-radius: 9px;
  font-size: 15px; color: var(--text-2); font-weight: 500;
}
.nav-link::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px;
  height: 2px; border-radius: 2px; background: var(--grad);
  transform: scaleX(0); transform-origin: left; transition: transform .32s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link.is-active { color: #fff; }
.nav-link.is-active::after { transform: scaleX(1); }

.header-cta { flex: none; }

.nav-toggle {
  display: none; width: 42px; height: 42px; margin-left: auto;
  flex-direction: column; justify-content: center; gap: 5px;
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line);
  border-radius: 11px; cursor: pointer;
}
.nav-toggle span {
  display: block; height: 1.8px; width: 19px; margin: 0 auto;
  background: var(--text); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* ---------------------------------------------------------------- Hero */

.hero { position: relative; z-index: 1; padding: 168px 0 96px; }
.hero-inner {
  display: grid; grid-template-columns: 1.06fr .94fr;
  gap: 60px; align-items: center;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px 7px 13px; border-radius: 999px;
  background: rgba(47, 227, 196, .08);
  border: 1px solid rgba(47, 227, 196, .25);
  font-size: 13.5px; color: #9df0e2; letter-spacing: .04em;
}
.pulse-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(47, 227, 196, .7);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(47, 227, 196, .65); }
  70% { box-shadow: 0 0 0 11px rgba(47, 227, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(47, 227, 196, 0); }
}

.hero-title {
  margin: 26px 0 0;
  font-size: clamp(40px, 5.4vw, 68px);
  font-weight: 700; line-height: 1.14; letter-spacing: -.02em;
}
.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub { margin-top: 22px; max-width: 540px; font-size: 17.5px; color: var(--text-2); line-height: 1.85; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-tags li {
  position: relative; padding-left: 18px;
  font-size: 14px; color: var(--text-3); letter-spacing: .03em;
}
.hero-tags li::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 5px; height: 5px; border-radius: 1px; background: var(--cyan); opacity: .8;
}

/* 雷达可视化 */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.radar { position: relative; width: min(100%, 460px); aspect-ratio: 1; }

.radar-svg { width: 100%; height: 100%; overflow: visible; }

.sweep { transform-origin: 220px 220px; animation: sweep 5s linear infinite; }
@keyframes sweep { to { transform: rotate(360deg); } }

.tgt .ring {
  fill: none; stroke-width: 1.3;
  transform-box: fill-box; transform-origin: center;
  animation: ping 2.8s var(--d, 0s) ease-out infinite;
}
@keyframes ping {
  0% { transform: scale(1); opacity: .85; }
  100% { transform: scale(3.4); opacity: 0; }
}

.float-chip {
  position: absolute; padding: 8px 15px; border-radius: 999px;
  background: rgba(11, 17, 32, .82);
  border: 1px solid var(--line-2);
  backdrop-filter: blur(10px);
  font-size: 12.5px; letter-spacing: .04em; color: var(--text);
  box-shadow: 0 10px 28px -14px rgba(0, 0, 0, .9);
  white-space: nowrap;
  animation: floaty 6s ease-in-out infinite;
}
.chip-a { top: 6%; right: 2%; border-color: rgba(47, 227, 196, .4); }
.chip-b { bottom: 20%; left: -4%; animation-delay: -2s; border-color: rgba(255, 106, 61, .4); }
.chip-c { bottom: 2%; right: 8%; animation-delay: -4s; border-color: rgba(77, 140, 255, .4); }

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------------------------------------------------------------- 数据条 */

.stats-band { position: relative; z-index: 1; padding: 8px 0 40px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; padding: 0;
  background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  padding: 30px 26px; text-align: center;
  background: linear-gradient(180deg, rgba(11, 17, 32, .9), rgba(8, 11, 20, .9));
}
.stat-value {
  font-size: 34px; font-weight: 700; letter-spacing: -.01em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.stat-value em { margin-left: 4px; font-style: normal; font-size: 14px; font-weight: 600; }
.stat-label { margin-top: 6px; font-size: 13.5px; color: var(--text-3); letter-spacing: .05em; }

/* ---------------------------------------------------------------- 通用区块 */

.section { position: relative; z-index: 1; padding: 96px 0; }
.section--alt { background: linear-gradient(180deg, transparent, rgba(11, 17, 32, .62), transparent); }
.section--pt0 { padding-top: 0; }

.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.section-tag {
  display: inline-block; margin-bottom: 14px;
  font-size: 13px; font-weight: 600; letter-spacing: .22em;
  text-transform: uppercase; color: var(--cyan);
}
.section-title { font-size: clamp(27px, 3.4vw, 40px); font-weight: 700; letter-spacing: -.02em; }
.section-desc { margin-top: 16px; font-size: 16.5px; color: var(--text-2); line-height: 1.85; }

.lead { font-size: 16.5px; color: var(--text-2); line-height: 1.85; }
.section-foot { margin-top: 46px; text-align: center; }

/* 两栏 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split--reverse .split-copy { order: 2; }
.split--reverse .split-cards { order: 1; }
.split-cards { display: grid; gap: 18px; }

/* 事实列表 */
.fact-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; margin-top: 34px; }
.fact-list dt { font-size: 13px; color: var(--text-3); letter-spacing: .06em; }
.fact-list dd { margin-top: 3px; font-size: 16px; font-weight: 600; }

/* 要点列表 */
.plain-list { display: grid; gap: 13px; margin-top: 28px; }
.plain-list li {
  position: relative; padding-left: 22px; color: var(--text-2); font-size: 15.5px;
}
.plain-list li::before {
  content: ""; position: absolute; left: 0; top: 11px;
  width: 7px; height: 7px; border-radius: 2px; background: var(--grad);
}

/* ---------------------------------------------------------------- 卡片通用 */

.adv-card, .biz-card, .scene-card, .tech-card,
.coop-card, .principle-card, .patent-card {
  position: relative; padding: 30px 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.adv-card::before, .biz-card::before, .scene-card::before, .tech-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(420px circle at 50% -20%, rgba(47, 227, 196, .12), transparent 62%);
  opacity: 0; transition: opacity .4s var(--ease);
}
.adv-card:hover, .biz-card:hover, .scene-card:hover, .tech-card:hover,
.coop-card:hover, .principle-card:hover {
  transform: translateY(-5px);
  border-color: rgba(47, 227, 196, .35);
  background: var(--panel-2);
}
.adv-card:hover::before, .biz-card:hover::before,
.scene-card:hover::before, .tech-card:hover::before { opacity: 1; }

.adv-card h3, .biz-card h3, .scene-card h3, .tech-card h3,
.coop-card h3, .principle-card h3 { font-size: 19px; margin-bottom: 10px; }
.adv-card p, .biz-card p, .scene-card p, .tech-card p,
.coop-card p, .principle-card p { font-size: 15px; color: var(--text-2); line-height: 1.8; }

/* 图标容器 */
.adv-icon, .biz-icon, .scene-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 50px; height: 50px; margin-bottom: 20px;
  border-radius: 14px; color: var(--cyan);
  background: rgba(47, 227, 196, .1);
  border: 1px solid rgba(47, 227, 196, .22);
}
.biz-icon--lg { width: 60px; height: 60px; border-radius: 18px; }
.scene-icon { color: var(--blue); background: rgba(77, 140, 255, .1); border-color: rgba(77, 140, 255, .22); }

/* ---------------------------------------------------------------- 业务卡 */

.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.biz-points { display: grid; gap: 9px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.biz-points li { display: flex; align-items: flex-start; gap: 9px; font-size: 14px; color: var(--text-3); }
.biz-points .ic-xs { color: var(--cyan); margin-top: 5px; }
.biz-points--inline { grid-template-columns: repeat(3, auto); justify-content: start; gap: 12px 30px; border: 0; padding-top: 0; margin-top: 22px; }
.biz-points--inline li { font-size: 14.5px; color: var(--text-2); }

/* 业务详情行 */
.biz-detail { display: grid; gap: 0; }
.biz-row {
  display: grid; grid-template-columns: 210px 1fr; gap: 40px;
  padding: 42px 0; border-top: 1px solid var(--line);
  transition: background .35s var(--ease);
}
.biz-row:last-child { border-bottom: 1px solid var(--line); }
.biz-row:hover { background: rgba(255, 255, 255, .018); }
.biz-row-side { display: flex; flex-direction: column; gap: 16px; }
.biz-row-side .biz-icon { margin-bottom: 0; }
.biz-index { font-size: 42px; font-weight: 700; color: rgba(255, 255, 255, .07); letter-spacing: -.03em; line-height: 1; }
.biz-row-body h2 { font-size: 25px; }
.biz-row-body .lead { margin-top: 12px; }

/* ---------------------------------------------------------------- 场景 */

.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scene-grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------------------------------------------------------------- 技术 */

.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.tech-card { padding: 34px 32px; }
.tech-num {
  display: block; margin-bottom: 16px;
  font-size: 15px; font-weight: 700; letter-spacing: .12em; color: var(--cyan); opacity: .8;
}
.tech-card h3 { font-size: 21px; }

.patent-card { padding: 30px 28px; }
.patent-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.patent-badge {
  display: inline-block; padding: 5px 13px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .06em;
  color: #ffd0bd; background: rgba(255, 106, 61, .12); border: 1px solid rgba(255, 106, 61, .3);
}
.patent-no { font-family: ui-monospace, Consolas, monospace; font-size: 13px; color: var(--text-3); letter-spacing: .04em; }
.patent-no--lg { font-size: 15px; color: var(--cyan); }
.patent-title { font-size: 20px; line-height: 1.5; }
.patent-field { margin-top: 12px; font-size: 14px; color: var(--text-3); }
.patent-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--text-3); }
.patent-meta--lg { gap: 24px 46px; border: 0; padding: 0; margin: 22px 0 0; }
.patent-meta--lg dt { font-size: 12.5px; color: var(--text-3); letter-spacing: .06em; }
.patent-meta--lg dd { margin-top: 3px; font-size: 15.5px; font-weight: 600; color: var(--text); }

.patent-block {
  padding: 40px 38px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255, 106, 61, .05), rgba(255, 255, 255, .02) 45%);
}
.patent-block-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 26px; flex-wrap: wrap; }
.patent-block-head h3 { margin-top: 14px; font-size: 24px; line-height: 1.45; max-width: 720px; }
.patent-summary { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--text-2); font-size: 15.5px; line-height: 1.95; }

/* 标签云 */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 11px; }
.tag-cloud--center { justify-content: center; margin-top: 48px; }
.tag {
  padding: 9px 17px; border-radius: 999px; font-size: 13.5px;
  color: #b9c7db; background: rgba(255, 255, 255, .045);
  border: 1px solid var(--line-2);
  transition: all .3s var(--ease);
}
.tag:hover { color: #fff; border-color: rgba(47, 227, 196, .5); background: rgba(47, 227, 196, .1); transform: translateY(-2px); }

/* ---------------------------------------------------------------- 合作 / 理念 */

.coop-grid, .principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* ---------------------------------------------------------------- 时间线 */

.timeline { position: relative; display: grid; gap: 10px; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 10px; bottom: 10px; width: 1px;
  background: linear-gradient(180deg, rgba(47, 227, 196, .6), rgba(77, 140, 255, .35), transparent);
}
.timeline li { position: relative; padding: 6px 0 30px; }
.tl-dot {
  position: absolute; left: -34px; top: 12px; width: 15px; height: 15px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 227, 196, .12);
}
.tl-dot--next { border-color: var(--text-3); box-shadow: none; border-style: dashed; }
.timeline time { font-size: 13.5px; font-weight: 600; letter-spacing: .1em; color: var(--cyan); }
.timeline h3 { margin: 8px 0 8px; font-size: 20px; }
.timeline p { color: var(--text-2); font-size: 15.5px; max-width: 760px; }

/* ---------------------------------------------------------------- 信息表 */

.info-table { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.info-row {
  display: grid; grid-template-columns: 220px 1fr;
  border-bottom: 1px solid var(--line);
  transition: background .3s var(--ease);
}
.info-row:last-child { border-bottom: 0; }
.info-row:hover { background: rgba(255, 255, 255, .022); }
.info-k { padding: 18px 26px; font-size: 14.5px; color: var(--text-3); background: rgba(255, 255, 255, .022); }
.info-v { padding: 18px 26px; font-size: 15px; }

/* ---------------------------------------------------------------- 新闻 */

.news-list { display: grid; gap: 14px; }
.news-item {
  display: grid; grid-template-columns: 150px 1fr 44px; gap: 28px; align-items: center;
  padding: 26px 30px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel);
  transition: transform .32s var(--ease), border-color .32s var(--ease), background .32s var(--ease);
}
.news-item:hover { transform: translateX(5px); border-color: rgba(47, 227, 196, .35); background: var(--panel-2); }
.news-date { font-size: 13.5px; color: var(--text-3); letter-spacing: .04em; }
.news-cat {
  display: inline-block; padding: 3px 11px; border-radius: 999px;
  font-size: 12px; letter-spacing: .06em; color: #9df0e2;
  background: rgba(47, 227, 196, .1); border: 1px solid rgba(47, 227, 196, .22);
}
.news-main h3 { margin: 10px 0 7px; font-size: 18.5px; line-height: 1.5; }
.news-main p { font-size: 14.5px; color: var(--text-3); line-height: 1.75; }
.news-go {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line-2); color: var(--cyan);
  transition: all .32s var(--ease);
}
.news-item:hover .news-go { background: var(--grad); color: #04121a; border-color: transparent; }

/* ---------------------------------------------------------------- 文章 */

.article { max-width: 800px; margin: 0 auto; }
.article-head h1 { margin: 14px 0 16px; font-size: clamp(26px, 3.6vw, 38px); line-height: 1.35; }
.article-meta { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-3); }
.dot { color: var(--text-3); }
.article-body { margin-top: 38px; padding-top: 34px; border-top: 1px solid var(--line); display: grid; gap: 22px; }
.article-body p { font-size: 16.5px; line-height: 2; color: #cdd7e6; text-align: justify; }
.article-foot { margin-top: 44px; }

.related { max-width: 800px; margin: 80px auto 0; }
.related-title { margin-bottom: 22px; font-size: 18px; color: var(--text-2); }

/* ---------------------------------------------------------------- 联系我们 */

.contact-layout { display: grid; grid-template-columns: 1fr 1.28fr; gap: 44px; align-items: start; }

.contact-info {
  padding: 38px 34px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(47, 227, 196, .05), rgba(255, 255, 255, .02) 55%);
}
.contact-info-title { margin-bottom: 28px; font-size: 20px; }
.contact-item { display: flex; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); }
.contact-item:first-of-type { border-top: 0; }
.contact-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; flex: none; border-radius: 13px;
  color: var(--cyan); background: rgba(47, 227, 196, .1); border: 1px solid rgba(47, 227, 196, .22);
}
.contact-item h4 { font-size: 14px; color: var(--text-3); font-weight: 600; letter-spacing: .06em; margin-bottom: 5px; }
.contact-item p { font-size: 15.5px; line-height: 1.7; }
.contact-item a:hover { color: var(--cyan); }

.contact-form-wrap { padding: 38px 38px 40px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.form-title { font-size: 20px; }
.form-hint { margin-top: 8px; font-size: 13.5px; color: var(--text-3); }
.form-hint em { color: var(--ir); font-style: normal; }
.form-hint--small { margin: 18px 0 22px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; margin-top: 26px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field > span { font-size: 13.5px; color: var(--text-2); letter-spacing: .03em; }
.field > span em { color: var(--ir); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px;
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  font-size: 15px; color: var(--text);
  transition: border-color .28s var(--ease), background .28s var(--ease), box-shadow .28s var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; line-height: 1.7; }
.field input::placeholder, .field textarea::placeholder { color: #55617a; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: rgba(47, 227, 196, .6);
  background: rgba(47, 227, 196, .055);
  box-shadow: 0 0 0 3px rgba(47, 227, 196, .12);
}
.field select option { background: #0b1120; color: var(--text); }

.alert {
  padding: 13px 18px; margin-bottom: 20px; border-radius: var(--radius-sm);
  font-size: 14.5px; border: 1px solid transparent;
}
.alert--success { color: #9df0e2; background: rgba(47, 227, 196, .1); border-color: rgba(47, 227, 196, .3); }
.alert--error { color: #ffc4b0; background: rgba(255, 106, 61, .1); border-color: rgba(255, 106, 61, .32); }

/* ---------------------------------------------------------------- 页头 / CTA / 404 */

.page-hero { position: relative; z-index: 1; padding: 152px 0 52px; }
.page-hero--slim { padding-bottom: 22px; }
.crumb { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--text-3); }
.crumb a:hover { color: var(--cyan); }
.page-title { margin-top: 18px; font-size: clamp(32px, 4.6vw, 52px); font-weight: 700; letter-spacing: -.02em; }
.page-sub { margin-top: 16px; max-width: 640px; font-size: 16.5px; color: var(--text-2); line-height: 1.85; }

.cta-band { position: relative; z-index: 1; padding: 0 0 96px; }
.cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap;
  padding: 52px 54px; border-radius: 22px;
  border: 1px solid rgba(47, 227, 196, .24);
  background:
    radial-gradient(600px circle at 12% 0%, rgba(47, 227, 196, .14), transparent 62%),
    radial-gradient(600px circle at 92% 100%, rgba(124, 92, 255, .16), transparent 62%),
    rgba(11, 17, 32, .72);
}
.cta-inner h2 { font-size: clamp(23px, 2.9vw, 32px); }
.cta-inner p { margin-top: 12px; font-size: 16px; color: var(--text-2); max-width: 560px; }

.error-page { padding: 180px 0 130px; text-align: center; }
.error-inner { max-width: 560px; }
.error-code {
  font-size: clamp(80px, 14vw, 150px); font-weight: 700; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  letter-spacing: -.04em;
}
.error-inner h1 { margin: 8px 0 14px; font-size: 28px; }
.error-desc { color: var(--text-2); }
.error-inner .hero-actions { justify-content: center; }

/* ---------------------------------------------------------------- 页脚 */

.site-footer { position: relative; z-index: 1; margin-top: 40px; border-top: 1px solid var(--line); background: rgba(6, 9, 16, .6); }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1.3fr; gap: 48px; padding: 64px 28px 48px; }
.brand--footer { margin-bottom: 18px; }
.footer-desc { font-size: 14.5px; color: var(--text-3); line-height: 1.85; max-width: 380px; }
.footer-col h4 { margin-bottom: 20px; font-size: 15px; color: var(--text); }
.footer-col ul { display: grid; gap: 11px; }
.footer-col a, .footer-contact span { font-size: 14.5px; color: var(--text-3); }
.footer-col a:hover { color: var(--cyan); }
.footer-contact li { display: flex; gap: 11px; align-items: flex-start; }
.footer-contact .ic { width: 16px; height: 16px; margin-top: 5px; color: var(--cyan); opacity: .8; }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding: 24px 28px 32px; border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--text-3);
}
.footer-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-bottom a:hover { color: var(--cyan); }

/* ---------------------------------------------------------------- 动画 */

.js .reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity .8s var(--ease) var(--delay, 0ms), transform .8s var(--ease) var(--delay, 0ms);
  will-change: opacity, transform;
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 1080px) {
  .hero { padding-top: 140px; }
  .hero-inner { grid-template-columns: 1fr; gap: 54px; }
  .hero-visual { order: -1; }
  .radar { width: min(88%, 380px); }
  .biz-grid, .scene-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .split--reverse .split-copy { order: 1; }
  .split--reverse .split-cards { order: 2; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav {
    position: fixed; inset: 74px 0 auto; margin: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 18px 24px 26px;
    background: rgba(7, 10, 18, .97);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .3s var(--ease), transform .3s var(--ease);
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-link { padding: 13px 14px; font-size: 16px; }
  .nav-link::after { display: none; }
  .nav-link.is-active { background: rgba(47, 227, 196, .1); color: #fff; }
  .header-cta { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .section { padding: 68px 0; }
  .hero { padding: 122px 0 60px; }
  .hero-title { font-size: clamp(32px, 8.4vw, 44px); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 24px 18px; }
  .stat-value { font-size: 27px; }
  .biz-grid, .scene-grid, .scene-grid--4, .tech-grid, .coop-grid, .principle-grid { grid-template-columns: 1fr; }
  .fact-list { grid-template-columns: 1fr; gap: 14px; }
  .biz-row { grid-template-columns: 1fr; gap: 18px; padding: 32px 0; }
  .biz-row-side { flex-direction: row; align-items: center; justify-content: space-between; }
  .biz-points--inline { grid-template-columns: 1fr; }
  .info-row { grid-template-columns: 1fr; }
  .info-k { padding: 12px 20px 4px; background: transparent; }
  .info-v { padding: 4px 20px 16px; }
  .news-item { grid-template-columns: 1fr; gap: 12px; padding: 22px 20px; }
  .news-go { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .contact-form-wrap, .contact-info, .patent-block { padding: 28px 22px; }
  .cta-inner { padding: 34px 26px; }
  .footer-top { grid-template-columns: 1fr; gap: 34px; padding: 48px 20px 32px; }
  .footer-bottom { padding: 22px 20px 28px; }
  .patent-block-head { flex-direction: column; gap: 12px; }
  .float-chip { font-size: 11.5px; padding: 6px 12px; }
  .chip-b { left: 0; }
}