/* ==========================================================================
   X-WAFER / 拾斛科技 官网样式
   设计基调：深色科技感。半导体 + 微光学。
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 背景层次：由深至浅，-900 最深，-500 最浅 */
  --bg-900: #05080f;
  --bg-850: #070c16;
  --bg-800: #0a111e;
  --bg-750: #0d1626;
  --bg-700: #111d30;
  --bg-600: #17263d;

  /* 品牌色：晶圆蓝紫 + 光波长
     --brand-green 为拾斛 logo 主色（取自 logo 实测值 #90BE20），
     用于 logo 光晕、强调点，与蓝紫主色形成冷暖对比 */
  --brand: #3d7dff;
  --brand-bright: #6aa5ff;
  --accent: #37e0d0;      /* 青色 */
  --accent-warm: #ffb547;  /* 暖光，用于高亮关键数据 */
  --brand-green: #90be20;  /* Logo 绿，仅用于装饰，不承载正文 */
  --brand-green-soft: rgba(144, 190, 32, 0.14);

  /* 文字 */
  --text-hi: #f2f6ff;
  --text: #b9c6dc;
  --text-lo: #7d8ba4;
  --text-faint: #55637d;

  /* 描边与分隔 */
  --line: rgba(122, 158, 214, 0.14);
  --line-strong: rgba(122, 158, 214, 0.28);

  /* 渐变 */
  --grad-brand: linear-gradient(120deg, #3d7dff 0%, #37e0d0 100%);
  --grad-text: linear-gradient(100deg, #ffffff 0%, #9dc0ff 55%, #37e0d0 100%);
  --grad-hair: linear-gradient(90deg, transparent, var(--line-strong), transparent);

  /* 排版 */
  --font: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;

  /* 尺度 */
  --shell: 1200px;
  --radius: 14px;
  --radius-sm: 9px;
  --nav-h: 72px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  margin: 0;
  background: var(--bg-900);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 全局背景纹理：晶圆同心圆 + 网格 + 顶部光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 55% at 50% -8%, rgba(61, 125, 255, 0.16), transparent 62%),
    radial-gradient(circle 900px at 88% 12%, rgba(55, 224, 208, 0.06), transparent 65%),
    linear-gradient(rgba(122, 158, 214, 0.035) 1px, transparent 1px) 0 0 / 100% 64px,
    linear-gradient(90deg, rgba(122, 158, 214, 0.035) 1px, transparent 1px) 0 0 / 64px 100%;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(61, 125, 255, 0.32); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg-850); }
::-webkit-scrollbar-thumb {
  background: var(--bg-600);
  border-radius: 6px;
  border: 3px solid var(--bg-850);
}
::-webkit-scrollbar-thumb:hover { background: #29405f; }

/* ---------- 3. 双语机制 ----------
   HTML 里同一处文案写两份：
     <span data-zh="中文" data-en="English">中文</span>

   ⚠ 关键：data-en 只是自定义属性，CSS 无法用它替换元素内容。
   所以「显示英文」靠 JS 改写元素文本（见 main.js 的 swapTexts），
   CSS 这边**不做任何显隐**，否则两套机制打架。

   保留 body.lang-en 是为了：
     1) <html lang> 语义与 SEO
     2) 必要时可按语言微调排版（目前未用到）
                                              */
body.lang-en { --i18n-scale: 1; }

/* ---------- 4. 布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 28px;
}

main { position: relative; z-index: 1; }

section { position: relative; padding: 104px 0; }
section.tight { padding: 72px 0; }

/* 章节头 */
.sec-head { max-width: 760px; margin-bottom: 56px; }
.sec-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--text-hi);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.015em;
}
h1 { font-size: clamp(36px, 5.4vw, 62px); }
h2 { font-size: clamp(27px, 3.5vw, 40px); }
h3 { font-size: clamp(19px, 2vw, 23px); }
h4 { font-size: 16px; }

.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.lead {
  font-size: 17px;
  color: var(--text);
  margin-top: 20px;
  max-width: 66ch;
}
.sec-head.center .lead { margin-inline: auto; }

.hr-grad {
  height: 1px;
  border: 0;
  background: var(--grad-hair);
  margin: 0;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.28s var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--grad-brand);
  color: #04101f;
  font-weight: 600;
  box-shadow: 0 8px 26px -10px rgba(61, 125, 255, 0.7);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px -10px rgba(61, 125, 255, 0.85);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text-hi);
  background: rgba(255, 255, 255, 0.02);
}
.btn-ghost:hover {
  border-color: var(--brand-bright);
  background: rgba(61, 125, 255, 0.1);
  transform: translateY(-2px);
}
.btn .arw { transition: transform 0.28s var(--ease); }
.btn:hover .arw { transform: translateX(3px); }

/* ---------- 6. 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s;
}
.nav.scrolled {
  background: rgba(7, 12, 22, 0.86);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  width: 100%;
}

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
/* nav 用横向完整版 logo（分子图形 + X-WAFER 文字），高度固定、宽度自适应。
   ⚠ 不能写死 width/height 方形，会把横向图压变形。
   之前曾用「简化版」（剔除 12 个外圈圆点），实测 36px 下完整版外圈圆点
   依然清晰可辨，而简化版看起来像「图案缺失」，得不偿失。 */
.brand-mark { height: 36px; width: auto; flex-shrink: 0; }
.brand-txt { line-height: 1.15; white-space: nowrap; }
.brand-cn {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-hi);
  letter-spacing: 0.06em;
}
.brand-en {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  /* 公司法定英文名，大小写必须原样显示，不做 uppercase 变换 */
  text-transform: none;
}

/* 页脚用横向完整版 logo（尺寸足够大，图形与 X-WAFER 文字都清晰）
   页脚第一列较窄，logo 与文字并排会把英文公司名挤成两行，
   所以页脚改为「logo 一行 + 文字一行」竖排。 */
.footer-brand .brand-mark { height: 46px; }
.footer-brand .brand {
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

/* logo 绿色微光：呼应"分子/光学"气质，hover 时轻微提亮 */
.brand-mark {
  filter: drop-shadow(0 0 10px rgba(144, 190, 32, 0.28));
  transition: filter 0.3s var(--ease), transform 0.3s var(--ease);
}
.brand:hover .brand-mark {
  filter: drop-shadow(0 0 16px rgba(144, 190, 32, 0.5));
  transform: scale(1.06);
}
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--text-lo);
  border-radius: 8px;
  transition: color 0.22s, background 0.22s;
}
.nav-links a:hover { color: var(--text-hi); background: rgba(255, 255, 255, 0.04); }
.nav-links a.active { color: var(--text-hi); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
}

.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* 语言切换 */
.lang-sw {
  display: flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.lang-sw button {
  padding: 6px 13px;
  color: var(--text-lo);
  transition: all 0.22s var(--ease);
}
.lang-sw button.on {
  background: var(--grad-brand);
  color: #04101f;
  font-weight: 600;
}
.lang-sw button:not(.on):hover { color: var(--text-hi); background: rgba(255, 255, 255, 0.05); }

.nav-burger { display: none; width: 40px; height: 40px; place-items: center; border-radius: 9px; border: 1px solid var(--line-strong); }
.nav-burger span { display: block; width: 17px; height: 1.5px; background: var(--text-hi); position: relative; transition: 0.3s var(--ease); }
.nav-burger span::before, .nav-burger span::after { content: ""; position: absolute; left: 0; width: 17px; height: 1.5px; background: var(--text-hi); transition: 0.3s var(--ease); }
.nav-burger span::before { top: -5.5px; }
.nav-burger span::after { top: 5.5px; }
body.menu-open .nav-burger span { background: transparent; }
body.menu-open .nav-burger span::before { top: 0; transform: rotate(45deg); }
body.menu-open .nav-burger span::after { top: 0; transform: rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: var(--nav-h) 0 auto 0;
  z-index: 99;
  background: rgba(7, 12, 22, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 18px 28px 28px;
  display: none;
  flex-direction: column;
  gap: 2px;
}
body.menu-open .drawer { display: flex; }
.drawer a {
  padding: 12px 4px;
  font-size: 16px;
  color: var(--text);
  border-bottom: 1px solid rgba(122, 158, 214, 0.07);
}
.drawer a.active { color: var(--brand-bright); }

/* ---------- 7. 首页 Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 88px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 68px;
  align-items: center;
}
.hero h1 { font-size: clamp(34px, 4.9vw, 56px); }
.hero .lead { font-size: 17.5px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 15px 6px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  font-size: 12.5px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--text-lo);
  margin-bottom: 26px;
}
.hero-tag b {
  padding: 2px 9px;
  border-radius: 100px;
  background: rgba(55, 224, 208, 0.14);
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.1em;
}

/* Hero 视觉：晶圆 */
.wafer-stage { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.wafer-stage::after {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 125, 255, 0.16), transparent 62%);
  filter: blur(38px);
  z-index: -1;
}
.wafer-svg { width: 100%; height: auto; animation: float 9s ease-in-out infinite; }

/* ---------- 7b. 首页 · 两大核心工艺（醒目区块） ---------- */
.coreproc {
  position: relative;
  padding: 74px 0 78px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 70% 120% at 50% 0%, rgba(61, 125, 255, 0.10), transparent 62%),
    linear-gradient(180deg, var(--bg-800), var(--bg-750));
}
.coreproc-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}
.coreproc-head h2 { font-size: clamp(26px, 3.2vw, 38px); }
.coreproc-head .lead { margin: 14px 0 0; max-width: 620px; }
.coreproc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.coreproc-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-800);
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}
.coreproc-card:hover { border-color: rgba(55, 224, 208, 0.42); transform: translateY(-3px); }
.coreproc-card .fig-cap { border-top: none; }
.coreproc-body { padding: 26px 28px 30px; display: flex; flex-direction: column; flex: 1; }
.coreproc-body h3 {
  margin: 0 0 6px;
  font-size: 24px;
  color: var(--text-hi);
}
.coreproc-body .sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
}
.coreproc-body > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-lo);
}
.coreproc-kpi {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: auto;
  padding: 16px 0 4px;
  border-top: 1px solid var(--line);
}
.coreproc-kpi .n {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}
.coreproc-kpi .t {
  font-size: 13px;
  color: var(--text-faint);
}
.coreproc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--brand-bright);
}
.coreproc-link:hover { color: var(--accent); }
.coreproc-link .arw { transition: transform 0.22s; }
.coreproc-link:hover .arw { transform: translateX(4px); }
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-16px) rotate(1.2deg); }
}
.wafer-halo {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(122, 158, 214, 0.12);
  animation: spin 46s linear infinite;
}
.wafer-halo::before {
  content: "";
  position: absolute;
  top: -3px; left: 50%;
  width: 5px; height: 5px;
  margin-left: -2.5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 8. 数据条 ---------- */
.statbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  background: var(--bg-800);
  padding: 30px 26px;
  transition: background 0.3s;
}
.stat:hover { background: var(--bg-750); }
.stat-n {
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.4vw, 40px);
  font-weight: 600;
  line-height: 1.1;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-n sup { font-size: 0.46em; vertical-align: super; margin-left: 2px; -webkit-text-fill-color: var(--accent); }
.stat-l {
  font-size: 13.5px;
  color: var(--text-lo);
  margin-top: 8px;
  line-height: 1.5;
}

/* ---------- 9. 卡片 ---------- */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  padding: 32px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--bg-800), var(--bg-850));
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 130px at 12% 0%, rgba(61, 125, 255, 0.13), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(61, 125, 255, 0.4);
  box-shadow: 0 20px 46px -22px rgba(0, 0, 0, 0.85);
}
.card:hover::before { opacity: 1; }
.card > * { position: relative; }

.card-ico {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: rgba(61, 125, 255, 0.11);
  border: 1px solid rgba(61, 125, 255, 0.24);
  margin-bottom: 22px;
  color: var(--brand-bright);
}
.card-ico svg { width: 22px; height: 22px; }
.card p { margin: 12px 0 0; font-size: 15px; color: var(--text-lo); }
.card h3 a { color: inherit; }

/* 编号卡 */
.card-n {
  position: absolute;
  top: 26px; right: 28px;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 600;
  color: rgba(122, 158, 214, 0.1);
  line-height: 1;
}
.card:hover .card-n { color: rgba(61, 125, 255, 0.24); }

/* 卡片内要点列表 */
.ticks { margin-top: 18px; display: flex; flex-direction: column; gap: 9px; }
.ticks li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: var(--text-lo);
  line-height: 1.6;
}
.ticks li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: rotate(45deg);
}

/* ---------- 10. 分割楔形 / 交替布局 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.split.reverse .split-media { order: -1; }
.split-figure {
  position: relative;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 0%, rgba(61, 125, 255, 0.08), transparent 62%),
    var(--bg-800);
}
.split-figure svg { width: 100%; height: auto; }
.fig-cap {
  margin-top: 18px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  text-align: center;
}

.checklist { display: flex; flex-direction: column; gap: 14px; margin-top: 30px; }
.checklist li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--text);
}
.checklist .tick {
  flex-shrink: 0;
  width: 19px; height: 19px;
  margin-top: 4px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(55, 224, 208, 0.14);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}

/* ---------- 10b. 工艺对比（薄胶 vs 厚胶） ---------- */
.vs {
  margin-top: 34px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.vs-card {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-800);
}
.vs-card.is-lead {
  border-color: rgba(55, 224, 208, 0.30);
  background:
    radial-gradient(circle at 100% 0%, rgba(55, 224, 208, 0.10), transparent 60%),
    var(--bg-800);
}
.vs-tag {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
}
.vs-card.is-lead .vs-tag { color: var(--accent); }
.vs-card h3 {
  margin: 0 0 16px;
  font-size: 19px;
  line-height: 1.35;
  color: var(--text-hi);
}
.vs-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.vs-list li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-lo);
}
.vs-list .mk {
  flex-shrink: 0;
  width: 18px; height: 18px;
  margin-top: 3px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 11px;
  font-weight: 700;
}
.vs-list .mk.no {
  background: rgba(255, 181, 71, 0.14);
  color: var(--accent-warm);
}
.vs-list .mk.yes {
  background: rgba(55, 224, 208, 0.16);
  color: var(--accent);
}
.vs-metric {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.vs-metric .num {
  display: block;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--accent);
}
.vs-metric .lbl {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* ---------- 11. 流程步骤 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.flow-step {
  position: relative;
  padding: 26px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-800);
}
.flow-step::after {
  content: "";
  position: absolute;
  top: 50%; right: -8px;
  width: 8px; height: 1px;
  background: var(--line-strong);
}
.flow-step:last-child::after { display: none; }
.flow-n {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 12px;
}
.flow-step h4 { font-size: 15.5px; margin-bottom: 8px; }
.flow-step p { font-size: 13.5px; color: var(--text-lo); margin: 0; line-height: 1.6; }

/* ---------- 12. 应用场景 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.app {
  position: relative;
  min-height: 226px;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-800);
  overflow: hidden;
  transition: all 0.35s var(--ease);
}
.app::before {
  content: "";
  position: absolute;
  inset: auto -30% -60% -30%;
  height: 180px;
  background: radial-gradient(ellipse at 50% 100%, rgba(61, 125, 255, 0.2), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}
.app:hover { border-color: rgba(55, 224, 208, 0.36); transform: translateY(-5px); }
.app:hover::before { opacity: 1; }
.app > * { position: relative; }
.app-ico { width: 40px; height: 40px; color: var(--accent); margin-bottom: 18px; }
.app h3 { font-size: 18px; }
.app p { margin: 10px 0 0; font-size: 14.5px; color: var(--text-lo); }
.app .app-tag {
  display: inline-block;
  margin-top: 16px;
  padding: 3px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* ---------- 13. 表格 ---------- */
.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-800);
}
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 620px; }
thead th {
  padding: 15px 22px;
  text-align: left;
  font-size: 12.5px;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--bg-750);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
tbody td {
  padding: 15px 22px;
  border-bottom: 1px solid rgba(122, 158, 214, 0.07);
  color: var(--text);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.22s; }
tbody tr:hover { background: rgba(61, 125, 255, 0.045); }
tbody td:first-child { color: var(--text-hi); font-weight: 500; }

/* ---------- 14. 页面头 ---------- */
.page-head {
  padding: calc(var(--nav-h) + 72px) 0 62px;
  border-bottom: 1px solid var(--line);
}
.crumbs {
  display: flex;
  gap: 9px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 22px;
}
.crumbs a:hover { color: var(--brand-bright); }
.crumbs span { opacity: 0.5; }

/* 页内章节跳转条 */
.jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}
.jump-nav a {
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-lo);
  transition: border-color 0.22s, color 0.22s, background 0.22s;
}
.jump-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(55, 224, 208, 0.08);
}

/* 锚点定位时避开固定导航条 */
section[id] { scroll-margin-top: calc(var(--nav-h) + 24px); }

/* ---------- 15. 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.info-list { display: flex; flex-direction: column; gap: 2px; margin-top: 34px; }
.info-row {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.info-ico { flex-shrink: 0; width: 21px; color: var(--accent); margin-top: 4px; }
.info-k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 5px;
}
.info-v { color: var(--text-hi); font-size: 15.5px; }
.info-v a { transition: color 0.22s; }
.info-v a:hover { color: var(--brand-bright); }

.form { display: flex; flex-direction: column; gap: 18px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--text-lo);
  margin-bottom: 8px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-800);
  color: var(--text-hi);
  font: inherit;
  font-size: 15px;
  transition: border-color 0.24s, box-shadow 0.24s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(61, 125, 255, 0.14);
}
.field textarea { resize: vertical; min-height: 130px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 12.5px; color: var(--text-faint); line-height: 1.6; }

/* ---------- 16. CTA 区块 ---------- */
.cta-band {
  position: relative;
  padding: 76px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(ellipse 70% 130% at 50% 0%, rgba(61, 125, 255, 0.2), transparent 65%),
    var(--bg-800);
  overflow: hidden;
  text-align: center;
}
.cta-band h2 { margin-bottom: 16px; }
.cta-band .lead { margin: 0 auto 32px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- 17. 时间线 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--brand), var(--accent), transparent);
  opacity: 0.5;
}
.tl-item { position: relative; padding-bottom: 40px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -31px; top: 7px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg-900);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(55, 224, 208, 0.1);
}
.tl-year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}
.tl-item h4 { margin-bottom: 7px; }
.tl-item p { margin: 0; font-size: 14.5px; color: var(--text-lo); }

/* ---------- 18. 页脚 ---------- */
.footer {
  position: relative;
  z-index: 1;
  margin-top: 30px;
  padding: 66px 0 32px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(7, 12, 22, 0.9));
}
.footer-top { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; }
.footer-brand .lead { font-size: 14.5px; margin-top: 18px; }
.fcol h5 {
  margin: 0 0 18px;
  font-size: 12.5px;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 500;
}
.fcol li { margin-bottom: 11px; }
.fcol a { font-size: 14.5px; color: var(--text-lo); transition: color 0.22s; }
.fcol a:hover { color: var(--brand-bright); }
.footer-bot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  margin-top: 52px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-faint);
}
.footer-bot a { color: var(--text-faint); transition: color 0.22s; }
.footer-bot a:hover { color: var(--brand-bright); }

/* ---------- 19. 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .wafer-stage { max-width: 480px; margin-inline: auto; order: -1; }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .vs { grid-template-columns: 1fr; }
  .coreproc-grid { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .g3, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow-step::after { display: none; }
  .statbar { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 760px) {
  section { padding: 72px 0; }
  .shell { padding: 0 20px; }
  .nav-links, .nav-actions .btn { display: none; }
  .nav-burger { display: grid; }
  .brand-mark { height: 30px; width: auto; }
  .brand-cn { font-size: 15px; }
  .g2, .g3, .g4, .app-grid, .flow { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: calc(var(--nav-h) + 56px) 0 60px; }
  .coreproc { padding: 56px 0 60px; }
  .coreproc-body { padding: 22px 20px 26px; }
  .card { padding: 26px 22px; }
  .footer-bot { flex-direction: column; gap: 8px; }
}

@media (max-width: 400px) {
  .statbar { grid-template-columns: 1fr; }
}

/* ---------- 21. 打印与降级 ---------- */
@media print {
  .nav, .drawer, .footer, .cta-band { display: none; }
  body { background: #fff; color: #000; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}