/* ============================================================
   GEO 智擎官网 v2 · 工程极简风
   参考 sheepgeo.com：近黑单色 / 大字排版 / 真实产品 UI / 浅色收尾
   ============================================================ */

:root {
  --bg: #161616;
  --bg-elevated: #1c1c1e;
  --surface: #202023;
  --surface-2: #26262a;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f3f4f6;
  --text-2: #a6a6ad;
  --text-3: #6f6f76;
  --good: #4ade80;
  --good-dim: rgba(74, 222, 128, 0.14);
  --warn: #d29922;
  --warn-dim: rgba(210, 153, 34, 0.13);
  --info: #79b8ff;
  --info-dim: rgba(121, 184, 255, 0.12);
  --light-bg: #f2f0ea;
  --light-text: #161616;
  --light-text-2: #57575c;
  --radius: 14px;
  --radius-lg: 18px;
  --font: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(255, 255, 255, 0.22); color: #fff; }

.container {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 200;
  background: rgba(255, 255, 255, 0.85);
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
}

/* ---------- 通用文本 ---------- */
.sec-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--text-3);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.sec-title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.sec-sub {
  margin-top: 18px;
  color: var(--text-2);
  font-size: 16.5px;
  max-width: 640px;
}

.br-mobile { display: none; }
@media (max-width: 640px) { .br-mobile { display: block; } }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 11px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 14px 30px; font-size: 15.5px; }
.btn-ico { width: 16px; height: 16px; }

.btn-primary { background: var(--text); color: #131313; }
.btn-primary:hover { background: #fff; transform: translateY(-1px); }

.btn-ghost {
  color: var(--text);
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
}
.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.4); transform: translateY(-1px); }

.btn-dark { background: #161616; color: #fff; }
.btn-dark:hover { background: #000; transform: translateY(-1px); }

.btn-outline-dark { color: #161616; border-color: rgba(22, 22, 22, 0.35); }
.btn-outline-dark:hover { border-color: #161616; transform: translateY(-1px); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  /* 顶部暗渐变：球体提亮为银白后保护导航文字对比度 */
  background: linear-gradient(to bottom, rgba(22, 22, 22, 0.88), rgba(22, 22, 22, 0));
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.nav.scrolled {
  /* 不用 backdrop-filter：固定导航每帧对背景高斯模糊，iGPU 笔记本滚动掉帧主因 */
  background: rgba(22, 22, 22, 0.92);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-logo { width: 30px; height: 30px; border-radius: 8px; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: 0.01em; }
.brand-dark { color: var(--light-text); }

.nav-links {
  display: flex;
  gap: 4px;
  margin-inline: auto;
}
.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.07); }
.nav-links a.active { color: #fff; background: rgba(255, 255, 255, 0.1); }

.nav-actions { display: flex; align-items: center; gap: 10px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  padding: 10px 9px;
  cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  padding: 150px 0 40px;
  overflow: hidden;
}
/* 顶部极淡的环境光，替代霓虹渐变 */
.hero-ambient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(720px 340px at 50% -8%, rgba(255, 255, 255, 0.07), transparent 70%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 34%);
  pointer-events: none;
}
/* 鼠标感应点阵画布 */
.hero-dots {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
  z-index: -2;
}
/* 层级：环境光(-3) < 点阵(-2) < 墨迹/3D画布(-1) < 内容 */
.hero-ambient { z-index: -3; }
#inkCanvas, #stageCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}
.hero-copy,
.board-wrap { position: relative; z-index: 1; }

/* 全局鼠标环境光（screen 混合，浅色区自然隐去） */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 640px; height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.07), transparent 62%);
  /* 不用 mix-blend-mode：固定层混合强制离屏合成，弱核显滚动变卡（浅色区白光自然不可见） */
  transform: translate(-9999px, -9999px);
  opacity: 0;
  transition: opacity 0.6s;
  pointer-events: none;
  z-index: 1;
  will-change: transform;
}
body.cursor-on .cursor-glow { opacity: 1; }

.hero-copy {
  position: relative;
  text-align: center;
  max-width: 880px;
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--text-3);
  margin-bottom: 26px;
}
.hero-title {
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.015em;
}
.hero-sub {
  margin: 24px auto 0;
  max-width: 620px;
  color: var(--text-2);
  font-size: 17px;
}
.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}
.hero-trust {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
  color: var(--text-3);
  font-size: 13.5px;
}
.hero-trust i { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); }

/* ---------- 产品看板（真实后台形式） ---------- */
.board-wrap { margin-top: 72px; }

.board {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  transition: transform 0.18s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}
.hero-visual-perspective { perspective: 1100px; }

.board-chrome {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.dots { display: flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.board-title { font-size: 13px; font-weight: 600; color: var(--text-2); letter-spacing: 0.03em; }
.board-meta { margin-left: auto; display: flex; gap: 8px; }

.meta-pill {
  font-size: 12px;
  color: var(--text-2);
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

/* 状态 pill（语义色，小面积） */
.pill {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 11px;
  border-radius: 999px;
  white-space: nowrap;
}
.pill-good { color: var(--good); background: var(--good-dim); border: 1px solid rgba(74, 222, 128, 0.28); }
.pill-warn { color: var(--warn); background: var(--warn-dim); border: 1px solid rgba(210, 153, 34, 0.3); }
.pill-info { color: var(--info); background: var(--info-dim); border: 1px solid rgba(121, 184, 255, 0.26); }
.pill-muted { color: var(--text-2); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border); }

/* 助手摘要条 */
.board-summary {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 18px 20px 0;
  padding: 13px 18px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}
.summary-icon { color: var(--text-3); font-size: 15px; }
.summary-text { flex: 1; min-width: 0; }
.summary-text b { font-size: 12px; font-weight: 600; color: var(--text-3); letter-spacing: 0.04em; }
.summary-text p { font-size: 14px; color: var(--text); margin-top: 1px; }
.summary-text strong { color: var(--warn); font-weight: 600; }
.summary-run {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  padding: 7px 14px;
  border-radius: 9px;
  border: 1px solid var(--border-strong);
  white-space: nowrap;
}

/* 数据卡 */
.board-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 18px 20px 0;
}
.b-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  position: relative;
  overflow: hidden;
}
.b-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.055), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.b-card:hover::before { opacity: 1; }
.b-label { font-size: 12.5px; color: var(--text-3); }
.b-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 4px;
}
.b-row b, .impact-grid b {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
}
.b-note { font-size: 12px; color: var(--text-3); margin-top: 2px; }

/* 图表行（等宽 2×2） */
.board-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 12px 20px 0;
}
.b-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 16px 8px;
  min-width: 0;
}
.b-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
}
.b-head h3 { font-size: 14px; font-weight: 700; color: var(--text); }
.b-tag { font-size: 11.5px; color: var(--text-3); }
.chart { width: 100%; height: 250px; }

/* 平台表现列表 */
.model-list { display: grid; gap: 4px; padding: 6px 0 10px; }
.model-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(56px, 0.9fr) 42px;
  align-items: center;
  gap: 10px;
  padding: 9px 6px;
  border-radius: 9px;
}
.model-row + .model-row { border-top: 1px solid var(--border); }
.m-name { font-size: 13.5px; font-weight: 600; color: var(--text); min-width: 0; }
.m-name em {
  display: block;
  font-style: normal;
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.m-bar {
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.m-bar i { display: block; height: 100%; border-radius: inherit; background: var(--good); }
.m-bar i.warn { background: var(--warn); }
.m-val { font-size: 12.5px; font-weight: 600; color: var(--text-2); text-align: right; font-variant-numeric: tabular-nums; }

/* 实时日志条 */
.board-ticker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 20px 20px;
  padding: 10px 16px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-2);
  min-height: 41px;
  letter-spacing: 0.02em;
  overflow: hidden;
}
.board-ticker #tickText { white-space: nowrap; overflow: hidden; text-overflow: clip; }
.tick-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--good);
  flex: none;
  animation: tick-pulse 1.8s ease-in-out infinite;
}
@keyframes tick-pulse { 50% { opacity: 0.35; } }
.tick-cursor {
  display: inline-block;
  width: 7px; height: 13px;
  background: var(--text-2);
  margin-left: 2px;
  flex: none;
  animation: tick-blink 1s steps(1) infinite;
}
@keyframes tick-blink { 50% { opacity: 0; } }

/* ---------- 平台覆盖条 ---------- */
.strip { padding: 46px 0 8px; }
.strip-inner {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding-top: 34px;
  border-top: 1px solid var(--border);
}
.strip-label {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--text-3);
}
.strip-list { font-size: 15px; font-weight: 600; color: var(--text-3); text-align: center; }
.strip-list i {
  display: inline-block;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  margin: 0 12px;
  vertical-align: middle;
}

/* ---------- 通用 section ---------- */
.section { padding: 110px 0; }

.sec-head { margin-bottom: 54px; }
.sec-head-split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: end;
}
.sec-head-split .sec-desc {
  color: var(--text-2);
  font-size: 15.5px;
  padding-bottom: 6px;
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.055), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card:hover { border-color: var(--border-strong); }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-2); }

/* ---------- 看板变体（能力章节内） ---------- */
.b-plain { padding: 20px 20px 10px; box-shadow: none; }
.grid-2 .b-plain .chart { height: 300px; }

/* ---------- 内容列表表格 ---------- */
.table { padding: 8px 20px; }
.tr {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 110px 100px 90px 130px;
  gap: 12px;
  align-items: center;
  padding: 13px 8px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.tr:first-child { border-top: none; }
.tr-head {
  font-size: 12px;
  color: var(--text-3);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding-block: 10px;
}
.c-title {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tr:not(.tr-head) .c-title { color: var(--text); }
.tr:not(.tr-head):hover { background: rgba(255, 255, 255, 0.02); }
.c-hit { color: var(--text-2); font-size: 13px; font-variant-numeric: tabular-nums; }
.c-hit b { color: var(--text); font-weight: 700; }
.c-channel { color: var(--text-3); font-size: 13px; }
.table-foot {
  padding: 12px 20px 16px;
  font-size: 12.5px;
  color: var(--text-3);
  border-top: 1px solid var(--border);
}

/* ---------- 效果卡 ---------- */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.impact-grid .b-card b { display: block; margin-top: 6px; }

/* ---------- 服务闭环 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  border-top: 1px solid var(--border);
  padding-top: 44px;
  position: relative;
}
.flow-node {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  transition: color 0.25s, border-color 0.25s;
}
.flow-step:hover .flow-node { color: var(--text); border-bottom-color: var(--border-strong); }
.flow-step h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.flow-step p { font-size: 13.5px; color: var(--text-2); padding-right: 8px; }

/* ---------- 数据亮点 ---------- */
.stats { padding: 20px 0 110px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--border);
}
.stat { text-align: center; padding: 38px 18px; position: relative; }
.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0; top: 26%;
  height: 48%;
  width: 1px;
  background: var(--border);
}
.stat-num {
  display: block;
  font-size: clamp(34px, 3.6vw, 46px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.stat-num.done { animation: stat-flash 1.1s ease-out 1; }
@keyframes stat-flash {
  0% { opacity: 0.55; }
  100% { opacity: 1; }
}
.stat-label { display: block; margin-top: 8px; font-size: 14px; font-weight: 600; color: var(--text-2); }

/* ---------- CTA（浅色翻转） ---------- */
.cta-light {
  background: var(--light-bg);
  color: var(--light-text);
  padding: 120px 0 110px;
  text-align: center;
}
.cta-light h2 {
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.015em;
}
.cta-light > .container > p {
  margin: 20px auto 0;
  max-width: 540px;
  color: var(--light-text-2);
  font-size: 16.5px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}
.cta-checks {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 26px;
  color: var(--light-text-2);
  font-size: 13.5px;
  font-weight: 500;
}
.cta-checks i { width: 3px; height: 3px; border-radius: 50%; background: rgba(22, 22, 22, 0.3); align-self: center; }
.cta-note { margin-top: 34px; font-size: 13px; color: rgba(22, 22, 22, 0.45); }

/* ---------- 页脚（浅色） ---------- */
.footer-light {
  background: var(--light-bg);
  color: var(--light-text);
  border-top: 1px solid rgba(22, 22, 22, 0.08);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p { margin-top: 16px; font-size: 13.5px; color: var(--light-text-2); }
.footer-col h4 {
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-col a, .footer-col span {
  display: block;
  font-size: 13.5px;
  color: var(--light-text-2);
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: #161616; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid rgba(22, 22, 22, 0.08);
  font-size: 12.5px;
  color: rgba(22, 22, 22, 0.5);
}

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 28px; bottom: 32px;
  z-index: 90;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(32, 32, 35, 0.9);
  border: 1px solid var(--border-strong);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s, border-color 0.25s;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { border-color: rgba(255, 255, 255, 0.45); transform: translateY(-2px); }
.back-top svg { width: 17px; height: 17px; }

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s cubic-bezier(0.22, 0.8, 0.3, 1), transform 0.65s cubic-bezier(0.22, 0.8, 0.3, 1);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #111; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  border: 2px solid #111;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.3); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .board-cards { grid-template-columns: repeat(2, 1fr); }
  .board-charts { grid-template-columns: 1fr; }
  .b-span2 { grid-column: auto; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .sec-head-split { grid-template-columns: 1fr; gap: 14px; align-items: start; }
  .impact-grid { grid-template-columns: repeat(3, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    padding: 16px 24px 22px;
    background: rgba(22, 22, 22, 0.97);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: 0.28s ease;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-toggle { display: inline-flex; }
  .nav-actions .btn-ghost { display: none; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3)::before, .stat:nth-child(4)::before { display: none; }
  .stat:nth-child(-n + 2) { border-bottom: 1px solid var(--border); }
  .flow { grid-template-columns: 1fr 1fr; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .tr { grid-template-columns: minmax(0, 1fr) 84px 88px; }
  .c-hit, .c-channel { display: none; }
  .board-summary { flex-wrap: wrap; }
  .summary-run { margin-left: 29px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .section { padding: 80px 0; }
  .back-top { right: 18px; bottom: 20px; }
  .hero { padding-top: 128px; }
  .cursor-glow { display: none; }
}

@media (max-width: 480px) {
  .flow { grid-template-columns: 1fr; }
  .hero-title { font-size: 38px; }
  .impact-grid { grid-template-columns: 1fr 1fr; }
  .board-cards { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 24px; }
  .stat-label { font-size: 12px; }
  .impact-grid b { font-size: 24px; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tick-dot, .tick-cursor, .stat-num.done { animation: none !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .board { transition: none; }
  .cursor-glow { display: none; }
}

/* ============================================================
   v3 · Creative-Tech 动效层
   ============================================================ */

/* ---------- 光标尾环（原生光标保持可见） ---------- */
.cursor-ring {
  position: fixed;
  top: 0; left: 0;
  z-index: 300;
  width: 42px; height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #fff;
  transition: width 0.25s, height 0.25s, background-color 0.25s, border-color 0.25s, opacity 0.3s;
}
body.cursor-ready .cursor-ring { opacity: 1; }
.cursor-ring.hover { width: 58px; height: 58px; background: rgba(255, 255, 255, 0.06); }
.cursor-ring.label {
  width: 68px; height: 68px;
  background: rgba(22, 22, 22, 0.72);
  border-color: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
/* ---------- 逐字排版动效 ---------- */
.split .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.65em) rotateX(62deg);
  filter: blur(7px);
  transform-origin: 50% 100%;
  transition: opacity 0.6s cubic-bezier(0.22, 0.8, 0.3, 1),
              transform 0.72s cubic-bezier(0.22, 0.8, 0.3, 1),
              filter 0.6s cubic-bezier(0.22, 0.8, 0.3, 1);
  transition-delay: calc(var(--i, 0) * 24ms);
  will-change: transform, opacity;
}
.split.visible .char,
.reveal.visible .split .char {
  opacity: 1;
  transform: none;
  filter: blur(0);
}

/* ---------- 按钮文字滚动 + 磁吸 ---------- */
.roll { position: relative; display: inline-block; overflow: hidden; vertical-align: bottom; }
.roll .roll-a { display: block; transition: transform 0.38s cubic-bezier(0.22, 0.8, 0.3, 1); }
.roll .roll-b {
  position: absolute;
  left: 0; top: 100%;
  display: block;
  transition: transform 0.38s cubic-bezier(0.22, 0.8, 0.3, 1);
}
.btn:hover .roll .roll-a,
.btn:hover .roll .roll-b { transform: translateY(-100%); }
.magnetic { transition: transform 0.18s ease-out; will-change: transform; }

/* ---------- 画廊 ---------- */
.gallery-wrap { position: relative; margin-top: 8px; }
.gallery-strip {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 22px;
  overflow-x: auto;
  padding: 14px max(24px, calc((100vw - 1200px) / 2)) 30px;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  cursor: grab;
}
.gallery-strip.dragging { cursor: grabbing; scroll-snap-type: none; }
.gallery-strip::-webkit-scrollbar { display: none; }
.poster-card {
  flex: 0 0 320px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  scroll-snap-align: center;
  transition: transform 0.35s cubic-bezier(0.22, 0.8, 0.3, 1), border-color 0.3s;
  will-change: transform;
}
.poster-card:hover { border-color: var(--border-strong); }
.poster-card:nth-child(even) { margin-top: 36px; }
.poster-card img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.poster-meta { padding: 14px 16px 18px; display: grid; gap: 3px; }
.poster-meta b { font-size: 15px; font-weight: 700; }
.poster-meta em { font-style: normal; font-size: 12px; color: var(--text-3); }
.poster-meta .pill { justify-self: start; margin-top: 8px; }
.gallery-hint {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
}
.trail-ghost {
  position: absolute;
  width: 110px;
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  pointer-events: none;
  z-index: 5;
  opacity: 0;
  object-fit: cover;
  animation: ghost-fade 0.85s ease-out forwards;
}
@keyframes ghost-fade {
  0% { opacity: 0.85; transform: rotate(var(--rot, 0deg)) scale(0.7); }
  100% { opacity: 0; transform: rotate(var(--rot, 0deg)) scale(1.05) translateY(-18px); }
}

@media (max-width: 760px) {
  .cursor-ring { display: none; }
  .poster-card { flex-basis: 260px; }
}

/* ---------- v3 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .split .char { opacity: 1; transform: none; filter: none; transition: none; }
  .roll .roll-a, .roll .roll-b { transition: none; }
  .trail-ghost { display: none; }
  .cursor-ring { display: none; }
}