/* ============================================================
   山西省元舟科技有限责任公司 · 展示官网
   设计方向：浅色精密科技风（Structured Confidence · 浅色版）
   强调色：精密蓝（主）+ 科技青（次），冷调中性色
   浏览器：现代浏览器（Chrome / Edge / Firefox / Safari）
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 中性色（冷蓝偏色，浅色主题） */
  --bg:      #f5f8fc;   /* 页面底 */
  --bg-2:    #eef3fa;   /* 交替段底 */
  --surface: #ffffff;   /* 卡片面 */
  --surface-2:#f4f8fd;  /* 浮起面 */
  --line:    #d6e0ee;   /* 描边 */
  --line-soft:#e3eaf4;  /* 弱描边 */

  --text-1: #0b1f3a;    /* 主文本（深藏青） */
  --text-2: #3d5470;    /* 次级文本 */
  --text-3: #64799a;    /* 弱文本/注释 */

  /* 强调色：精密蓝（主） + 科技青（次） */
  --accent:       #1463e0;
  --accent-strong:#2f76ff;
  --accent-deep:  #0c4ab8;
  --accent-tint:  #e8f0ff;
  --accent-line:  #c3d7ff;
  --cyan:         #0ea5e9;

  /* 阴影（浅色主题用投影表达层级） */
  --shadow-sm: 0 1px 2px rgba(11, 31, 58, 0.05), 0 4px 12px rgba(11, 31, 58, 0.06);
  --shadow-md: 0 12px 32px -12px rgba(11, 31, 58, 0.16);
  --shadow-lg: 0 30px 60px -24px rgba(11, 31, 58, 0.20);

  /* 字体 */
  --font-sans: "HarmonyOS Sans SC", "MiSans", "PingFang SC",
               "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC",
               system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Mono",
               Consolas, "Liberation Mono", monospace;

  /* 布局 */
  --container: 1200px;
  --radius: 10px;
  --radius-sm: 6px;
  --header-h: 72px;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

::selection { background: var(--accent); color: #ffffff; }

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 16px; }

/* ---------- 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding: 104px 0;
  position: relative;
}
.section--alt { background: var(--bg-2); }

.section-head { max-width: 720px; margin-bottom: 56px; }

.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent-deep);
  margin: 0 0 18px;
  text-transform: uppercase;
}
.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
  flex: none;
}

.h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

.section-intro {
  margin: 0;
  font-size: 17px;
  color: var(--text-2);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out),
              border-color 0.25s var(--ease-out), transform 0.2s var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--accent); color: #ffffff; }
.btn--primary:hover { background: var(--accent-strong); }
.btn--primary::after {
  content: "→";
  margin-left: 2px;
  transition: transform 0.25s var(--ease-out);
}
.btn--primary:hover::after { transform: translateX(3px); }

.btn--ghost {
  background: transparent;
  color: var(--text-1);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-deep); }

/* ---------- 标签 ---------- */
.chip {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-2);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(245, 248, 252, 0.85);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
}
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.brand__name small {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.22em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  position: relative;
  font-size: 14.5px;
  color: var(--text-2);
  transition: color 0.2s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--accent);
  transition: right 0.25s var(--ease-out);
}
.nav-links a:hover, .nav-links a[aria-current="true"] { color: var(--text-1); }
.nav-links a:hover::after, .nav-links a[aria-current="true"]::after { right: 0; }

.nav-cta-mobile { display: none; }

.header-actions { display: flex; align-items: center; gap: 14px; }
.header-actions .btn { padding: 10px 20px; font-size: 14px; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--text-1);
  transition: transform 0.3s var(--ease-out), opacity 0.2s ease;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 88px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(11, 31, 58, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 31, 58, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 30% 20%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 30% 20%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: 4%;
  right: -10%;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(circle, rgba(20, 99, 224, 0.09), transparent 62%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  margin-bottom: 26px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--accent-deep);
  background: var(--accent-tint);
}
.hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(38px, 5.4vw, 66px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-1);
}
.hero h1 .accent-text {
  color: var(--accent);
  background: linear-gradient(100deg, var(--accent) 10%, var(--cyan) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  margin: 0 0 34px;
  max-width: 560px;
  font-size: 17.5px;
  color: var(--text-2);
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 26px;
  border-top: 1px solid var(--line-soft);
}
.hero-trust .chip { font-family: var(--font-sans); color: var(--text-3); }

/* Hero 能力拓扑图 */
.topo-card {
  position: relative;
  padding: 20px;
  background: linear-gradient(160deg, #ffffff, #f1f6fd);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
/* 科技感角标（左上 / 右下） */
.topo-card::before,
.topo-card::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--accent);
  opacity: 0.5;
  pointer-events: none;
}
.topo-card::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: var(--radius);
}
.topo-card::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: var(--radius);
}

.topo-card__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 2px 14px;
}
.topo-card__bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}
.topo-card .topo-card__bar i:nth-child(1) { background: #ff8f7a; }
.topo-card .topo-card__bar i:nth-child(2) { background: #ffc46b; }
.topo-card .topo-card__bar i:nth-child(3) { background: var(--accent); }
.topo-card__bar span {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 0.08em;
}

.topo-node {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.topo-node b {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-1);
  font-weight: 600;
  white-space: nowrap;
}
.topo-node small {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}
.topo-node--center {
  justify-content: center;
  border-color: var(--accent-line);
  background: var(--accent-tint);
}
.topo-node--center b { color: var(--accent-deep); }

.topo-lines { stroke: #c7d6ea; }
.topo-lines--live {
  stroke: var(--cyan);
  stroke-dasharray: 5 7;
  animation: dash 14s linear infinite;
}

/* SVG 拓扑图文本使用等宽字体 */
.topo-card svg text { font-family: var(--font-mono); }

/* ---------- 数据带 ---------- */
.stats {
  padding: 0 0 96px;
  margin-top: -16px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.stat-item {
  padding: 34px 28px;
  border-left: 1px solid var(--line-soft);
}
.stat-item:first-child { border-left: 0; }
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 3.4vw, 46px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-1);
  line-height: 1.1;
}
.stat-num em {
  font-style: normal;
  color: var(--accent);
}
.stat-label { margin-top: 8px; font-size: 13.5px; color: var(--text-3); }

/* ---------- 服务列表 ---------- */
.svc-list { display: flex; flex-direction: column; }

.svc-row {
  display: grid;
  grid-template-columns: 120px 1.05fr 1fr;
  gap: 28px;
  align-items: start;
  padding: 34px 8px 34px 26px;
  border-top: 1px solid var(--line-soft);
  position: relative;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.svc-row:last-child { border-bottom: 1px solid var(--line-soft); }
.svc-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease-out);
}
.svc-row:hover { background: var(--surface); box-shadow: var(--shadow-sm); }
.svc-row:hover::before { transform: scaleY(1); }

.svc-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-3);
  padding-top: 6px;
}
.svc-row:hover .svc-num { color: var(--accent-deep); }

.svc-title {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
}
.svc-desc { margin: 8px 0 0; font-size: 15px; color: var(--text-2); }

.svc-body { display: flex; flex-direction: column; gap: 12px; padding-top: 4px; }
.svc-chips { display: flex; flex-wrap: wrap; gap: 8px; }

.svc-note {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 32px;
  padding: 18px 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-3);
  font-size: 14px;
}
.svc-note b { color: var(--text-2); }

/* ---------- AI 能力 ---------- */
.ai-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.ai-list { display: flex; flex-direction: column; margin-top: 8px; }

.ai-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 6px 16px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.ai-item:first-of-type { border-top: 1px solid var(--line-soft); }
.ai-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  padding-top: 3px;
}
.ai-item h3 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
}
.ai-item p { margin: 0; font-size: 14.5px; color: var(--text-2); }

/* 终端面板（深色焦点设备，浅色页面中的高光） */
.term {
  position: relative;
  background: #0a1930;
  border: 1px solid #16294a;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.term::before,
.term::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(34, 211, 238, 0.55);
  pointer-events: none;
}
.term::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: var(--radius);
}
.term::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: var(--radius);
}
.term .topo-card__bar i:nth-child(1) { background: #ff7a6b; }
.term .topo-card__bar i:nth-child(2) { background: #ffc46b; }
.term .topo-card__bar i:nth-child(3) { background: #22d3ee; }
.term .topo-card__bar span { color: #6f86ab; }

.term__body {
  padding: 22px 24px 26px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 2;
  color: #c8d8f0;
  overflow-x: auto;
}
.term__body .p { color: #22d3ee; }
.term__body .ok { color: #37d3a2; }
.term__body .dim { color: #6f86ab; }
.term__body .hl { color: #e8f1ff; }
.term__cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: #22d3ee;
  vertical-align: -3px;
  animation: blink 1.1s steps(1) infinite;
}
.term__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid #16294a;
  background: #0d1e3a;
}
.term__foot .chip { border-color: #22365c; color: #9db4d8; }

/* ---------- 实施路径 ---------- */
.prc-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}
.prc-item {
  position: relative;
  padding: 30px 24px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, transform 0.3s var(--ease-out), box-shadow 0.3s ease;
}
.prc-item:hover {
  border-color: var(--accent-line);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.prc-item__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 18px;
}
.prc-item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}
.prc-item p { margin: 0; font-size: 14px; color: var(--text-2); }

/* ---------- 关于元舟 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.about-lead {
  font-size: 22px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--text-1);
  margin: 0 0 18px;
}
.about-lead em { color: var(--accent-deep); font-style: normal; }
.about-copy { margin: 0 0 26px; font-size: 15.5px; }

.cert-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.value-list { display: flex; flex-direction: column; }
.value-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 18px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.value-item:first-of-type { border-top: 1px solid var(--line-soft); }
.value-item__idx {
  font-family: var(--font-mono);
  color: var(--text-3);
  font-size: 13px;
  padding-top: 3px;
}
.value-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
}
.value-item p { margin: 0; font-size: 14.5px; color: var(--text-2); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item[open] {
  border-color: var(--accent-line);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent);
  flex: none;
  transition: transform 0.3s var(--ease-out);
}
.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item__body {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-2);
}
.faq-item__body p { margin: 0; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.contact-list { display: flex; flex-direction: column; margin: 10px 0 28px; }
.contact-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.contact-item dt {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-3);
  padding-top: 3px;
}
.contact-item dd { margin: 0; font-size: 15.5px; color: var(--text-1); }
.contact-item dd small { display: block; color: var(--text-3); font-size: 12px; margin-top: 2px; }

.contact-note {
  padding: 18px 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-3);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
}
.field label i { color: var(--accent); font-style: normal; }

.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  background: #f6f9fd;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: #93a4bd; }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

.form .btn { align-self: flex-start; margin-top: 4px; }
.form-tip {
  margin: 0;
  font-size: 12.5px;
  color: var(--text-3);
}

.form-success {
  display: none;
  padding: 14px 16px;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius-sm);
  background: var(--accent-tint);
  color: var(--accent-deep);
  font-size: 14px;
}
.form-success.show { display: block; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand p { margin: 16px 0 0; font-size: 14px; color: var(--text-3); max-width: 300px; }
.footer-col h4 {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-1);
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: 14px; color: var(--text-3); transition: color 0.2s ease; }
.footer-col a:hover { color: var(--accent-deep); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- 滚动显现（必须 fail-open：默认可见） ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--d, 0s);
}
html.js .reveal.revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 动效 ---------- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}
@keyframes dash {
  to { stroke-dashoffset: -240; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .topo-card { max-width: 560px; }
  .ai-wrap { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .prc-list { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(3) { border-left: 0; }
  .stat-item:nth-child(n + 3) { border-top: 1px solid var(--line-soft); }
}

@media (max-width: 860px) {
  body { font-size: 15px; }
  .section { padding: 80px 0; }

  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 28px 24px 40px;
    background: var(--bg);
    border-top: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { display: block; padding: 13px 0; font-size: 19px; font-weight: 600; }
  .nav-links a::after { display: none; }
  .nav-links .nav-cta-mobile { margin-top: 18px; }
  .nav-cta-mobile { display: block; }
  .nav-cta-desktop { display: none; }

  .svc-row { grid-template-columns: 64px 1fr; gap: 12px 18px; }
  .svc-body { grid-column: 1 / -1; }

  .prc-list { grid-template-columns: 1fr; }

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

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

@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 24px 20px; }
  .hero { padding-top: calc(var(--header-h) + 48px); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-cta .btn { width: 100%; }
}

/* ================= 行业方案与案例 ================= */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 8px;
}

.industry-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.industry-card::before,
.industry-card::after {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  border: 2px solid var(--accent);
  opacity: .45;
  pointer-events: none;
  transition: opacity .25s ease;
}
.industry-card::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; border-top-left-radius: var(--radius); }
.industry-card::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; border-bottom-right-radius: var(--radius); }
.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-line);
}
.industry-card:hover::before,
.industry-card:hover::after { opacity: .9; }

.industry-card__head { display: flex; align-items: flex-start; gap: 16px; }
.industry-card__icon {
  flex: 0 0 48px;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--accent-tint);
  border: 1px solid var(--accent-line);
  color: var(--accent);
}
.industry-card__icon svg { width: 24px; height: 24px; }
.industry-card__head h3 { font-size: 20px; margin: 2px 0 6px; }
.industry-card__head p { font-size: 13.5px; color: var(--text-2); line-height: 1.6; margin: 0; }

.industry-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.industry-tags li {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-deep);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
  letter-spacing: .02em;
}

.industry-case {
  position: relative;
  background: linear-gradient(180deg, #f2f7ff, #eaf2ff);
  border: 1px solid var(--accent-line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 18px 18px 16px;
  margin-top: 2px;
}
.case-badge {
  position: absolute; top: 12px; right: 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: var(--accent-deep);
  border: 1px dashed var(--accent);
  border-radius: 999px;
  padding: 2px 9px;
  background: rgba(255, 255, 255, .6);
}
.industry-case h4 { font-size: 15px; margin: 0 0 6px; padding-right: 64px; }
.case-scene { font-size: 13px; color: var(--text-2); line-height: 1.6; margin: 0 0 14px; }

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  border-top: 1px dashed var(--accent-line);
  padding-top: 14px;
}
.case-metric { display: flex; flex-direction: column; gap: 3px; }
.case-metric__num.stat-num { font-size: 24px; letter-spacing: -0.01em; }
.case-metric__num em { font-style: normal; font-size: 14px; color: var(--cyan); }
.case-metric__label { font-size: 12px; color: var(--text-3); line-height: 1.4; }

.industry-card__cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.industry-card__cta span { transition: transform .2s ease; }
.industry-card__cta:hover span { transform: translateX(4px); }

.industry-note { margin: 22px 0 0; font-size: 12.5px; color: var(--text-3); }

/* 区块标题渐变强调 */
.section .accent-text {
  color: var(--accent);
  background: linear-gradient(100deg, var(--accent) 10%, var(--cyan) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (max-width: 860px) {
  .industry-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .industry-card { padding: 24px 20px 22px; }
  .case-metric__num.stat-num { font-size: 20px; }
}