/* ============================================================
   木桐未来科技 · 官网样式
   设计基调：浅色企业 SaaS 科技风，蓝紫渐变（对齐品牌 Logo 与参考站）
   ============================================================ */

:root {
  /* 品牌主色（对齐 logo 蓝→紫渐变） */
  --blue: #1677ff;          /* 主蓝 */
  --blue-deep: #3d54ff;     /* 深蓝紫 */
  --blue-bright: #0082ff;   /* 亮蓝 */
  --violet: #743eff;        /* 紫 */
  --indigo: #3863ea;        /* 靛蓝 */
  --cyan: #35c4ff;          /* 青蓝点缀 */

  /* 渐变 */
  --grad-brand: linear-gradient(120deg, #0082ff 0%, #3d54ff 46%, #743eff 100%);
  --grad-brand-soft: linear-gradient(120deg, rgba(0, 130, 255, 0.10), rgba(116, 62, 255, 0.10));

  /* 中性色 */
  --ink: #000d42;           /* 主文字 · 深蓝 */
  --navy: #18315d;          /* 深蓝 */
  --slate: #495770;         /* 次要文字 */
  --muted: #7b8496;         /* 弱文字 */
  --line: #e6eaf5;          /* 分割线 */
  --line-strong: #d4dcef;
  --bg: #ffffff;
  --bg-soft: #fafbff;       /* 主背景 · 浅蓝白 */
  --bg-tint: #f0f4ff;       /* 浅蓝底 */
  --bg-blue: #e8f3ff;       /* 极浅蓝 */

  /* 字体 */
  --display: "Inter", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei",
    "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --body: "Inter", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei",
    "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --utility: "Bahnschrift", "DIN Alternate", "Segoe UI", Arial, sans-serif;

  /* 布局 */
  --page: min(1200px, calc(100vw - 48px));
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(45, 55, 92, 0.05), 0 4px 14px rgba(45, 55, 92, 0.05);
  --shadow-md: 0 2px 4px rgba(45, 55, 92, 0.05), 0 12px 32px rgba(45, 55, 92, 0.08);
  --shadow-lg: 0 6px 16px rgba(45, 55, 92, 0.06), 0 24px 60px rgba(45, 55, 92, 0.12);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { color: #fff; background: var(--indigo); }

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; font: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 18px;
  color: #fff;
  background: var(--indigo);
  border-radius: var(--radius-sm);
  font-size: 14px;
  box-shadow: var(--shadow-md);
}
.skip-link:focus { transform: translateY(0); }

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  height: 68px;
  padding: 0 max(24px, calc((100vw - 1200px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border-bottom: 1px solid rgba(45, 55, 92, 0.08);
  transition: box-shadow 240ms ease, border-color 240ms ease;
}

.site-header.is-scrolled {
  border-bottom-color: transparent;
  box-shadow: 0 2px 12px rgba(45, 55, 92, 0.10);
}

.brand { display: flex; align-items: center; gap: 11px; }
.brand img { width: 38px; height: 38px; }
.brand-copy { display: grid; line-height: 1.15; gap: 4px; }
.brand-copy strong { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; color: var(--ink); }
.brand-copy small { font-family: var(--utility); font-size: 8px; letter-spacing: 0.2em; color: var(--indigo); }

.site-nav { display: flex; align-items: center; gap: 2px; font-size: 14.5px; }
.site-nav > a {
  position: relative;
  padding: 9px 15px;
  border-radius: 8px;
  color: var(--slate);
  font-weight: 500;
  transition: color 160ms ease, background 160ms ease;
}
.site-nav > a:not(.nav-cta):hover { color: var(--indigo); background: var(--bg-blue); }
.nav-cta {
  margin-left: 12px;
  padding: 10px 20px !important;
  color: #fff !important;
  background: var(--grad-brand);
  border-radius: 999px !important;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(61, 84, 255, 0.28);
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(61, 84, 255, 0.38); }
.nav-cta span { margin-left: 6px; }
.menu-toggle { display: none; border: 0; background: transparent; }

/* ---------- 通用容器 ---------- */
.section-shell { width: var(--page); margin-inline: auto; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 156px max(24px, calc((100vw - 1200px) / 2)) 68px;
  overflow: hidden;
  background:
    radial-gradient(900px 480px at 84% -10%, rgba(0, 130, 255, 0.10), transparent 62%),
    radial-gradient(760px 460px at -6% 24%, rgba(116, 62, 255, 0.08), transparent 60%),
    linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
}

/* 细网格 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 99, 234, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 99, 234, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 72% at 50% 0%, #000 0%, transparent 74%);
  -webkit-mask-image: radial-gradient(ellipse 90% 72% at 50% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  align-items: center;
  gap: 56px;
}

.eyebrow, .section-kicker {
  margin: 0 0 22px;
  font-family: var(--utility);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--indigo);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--bg-blue);
  border-radius: 999px;
  color: var(--indigo);
}
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(46px, 5.6vw, 72px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.hero h1 em {
  display: block;
  font-style: normal;
  background: linear-gradient(100deg, var(--blue-bright) 0%, var(--blue-deep) 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-lead {
  max-width: 560px;
  margin: 26px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--slate);
}

.hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 40px; }

/* ---------- 按钮 ---------- */
.button {
  min-height: 50px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.button-primary {
  color: #fff;
  background: var(--grad-brand);
  box-shadow: 0 6px 20px rgba(61, 84, 255, 0.32);
}
.button-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(61, 84, 255, 0.44); }
.button-light { color: var(--indigo); background: #fff; border: 1px solid var(--line-strong); box-shadow: var(--shadow-sm); }
.button-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--blue); }
.button span { transition: transform 160ms ease; }
.button-primary:hover span { transform: translateY(2px); }

.text-link {
  padding: 12px 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--indigo);
  border-bottom: 2px solid var(--blue);
  transition: color 160ms ease, border-color 160ms ease;
}
.text-link:hover { color: var(--violet); border-color: var(--violet); }

/* ---------- 产品系统示意图 ---------- */
.growth-system {
  position: relative;
  width: min(100%, 500px);
  aspect-ratio: 1 / 1;
  margin-left: auto;
}

.growth-system::after {
  content: "";
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 130, 255, 0.10), transparent 64%);
  pointer-events: none;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(56, 99, 234, 0.20);
  border-radius: 50%;
}
.orbit::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px dashed rgba(56, 99, 234, 0.20);
  border-radius: inherit;
}
.orbit-a { inset: 3%; animation: spin 30s linear infinite; }
.orbit-b { inset: 15%; animation: spinReverse 22s linear infinite; }
.orbit-c { inset: 28%; border-color: rgba(116, 62, 255, 0.30); animation: breathe 5s ease-in-out infinite; }

.system-axis {
  position: absolute;
  z-index: 1;
  width: 1px;
  height: 58%;
  left: 50%;
  top: 22%;
  background: linear-gradient(transparent, var(--violet) 27%, var(--violet) 73%, transparent);
  opacity: 0.5;
}
.system-axis::before, .system-axis::after {
  content: "";
  position: absolute;
  left: -4px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--violet);
  border-radius: 2px;
  transform: rotate(45deg);
}
.system-axis::before { top: 16%; }
.system-axis::after { bottom: 4%; }

.system-core {
  position: absolute;
  z-index: 4;
  left: 50%;
  top: 50%;
  width: 148px;
  height: 148px;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  background: linear-gradient(150deg, #3d54ff, #743eff);
  border-radius: 20px;
  box-shadow: 0 18px 44px rgba(61, 84, 255, 0.32);
}
.system-core small { font-family: var(--utility); font-size: 8px; letter-spacing: 0.18em; color: #cfe0ff; }
.system-core strong { margin-top: 7px; font-size: 18px; line-height: 1.35; font-weight: 700; }
.core-pulse {
  position: absolute;
  inset: -8px;
  border: 1px solid rgba(61, 84, 255, 0.35);
  border-radius: 26px;
  animation: pulse 3s ease-in-out infinite;
}

.system-node {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  background: #fff;
  padding: 9px 13px 9px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}
.system-node i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(0, 130, 255, 0.14);
  flex: none;
}
.system-node span { display: grid; gap: 1px; font-weight: 600; color: var(--ink); }
.system-node small { font-family: var(--utility); font-size: 7px; letter-spacing: 0.14em; color: var(--indigo); }
.node-one { left: 0; top: 26%; }
.node-two { right: -1%; top: 19%; }
.node-three { right: 1%; bottom: 20%; }
.node-four { left: 4%; bottom: 16%; }
.system-caption {
  position: absolute;
  right: 5%;
  bottom: 2%;
  margin: 0;
  font-family: var(--utility);
  font-size: 8px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ---------- 数据条 ---------- */
.proof-strip {
  position: relative;
  margin-top: 68px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.proof-strip > div {
  padding: 20px 24px;
  display: grid;
  gap: 4px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color 200ms ease, transform 200ms ease;
}
.proof-strip > div:hover { border-color: var(--blue); transform: translateY(-2px); }
.proof-strip strong { font-family: var(--utility); font-size: 22px; font-weight: 700; letter-spacing: -0.01em; color: var(--indigo); }
.proof-strip span { font-size: 12.5px; color: var(--slate); }

/* ---------- 主张 ---------- */
.statement { padding-block: 110px; }
.statement .section-kicker { text-align: center; }
.statement-text {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
  font-size: clamp(30px, 3.8vw, 54px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.statement-text span {
  position: relative;
  color: var(--indigo);
  white-space: nowrap;
}
.statement-text span::after {
  content: "";
  position: absolute;
  left: 4%;
  right: 4%;
  bottom: -2px;
  height: 6px;
  background: linear-gradient(90deg, var(--blue-bright), var(--violet));
  border-radius: 4px;
}

/* ---------- 区块标题 ---------- */
.section-heading {
  display: grid;
  grid-template-columns: 1.15fr 0.7fr;
  align-items: end;
  gap: 64px;
  margin-bottom: 52px;
}
.section-heading h2, .about h2, .cooperate h2, .capability-intro h2 {
  margin: 0;
  font-weight: 800;
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.section-heading > p { margin: 0; font-size: 15.5px; line-height: 1.85; color: var(--slate); }

/* ---------- 产品区 ---------- */
.products { padding-block: 90px 120px; background: var(--bg-soft); }

.product-feature {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  min-height: 540px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.product-story { padding: 52px; display: flex; flex-direction: column; align-items: flex-start; background: var(--bg-soft); }
.product-index {
  padding: 6px 13px;
  font-family: var(--utility);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--indigo);
  background: var(--bg-blue);
  border-radius: 999px;
}
.product-name { display: flex; align-items: center; gap: 18px; margin-top: 44px; }
.product-name img { width: 62px; height: 62px; flex: none; }
.product-name h3 { margin: 0; font-family: var(--utility); font-size: 40px; font-weight: 700; line-height: 1; letter-spacing: -0.03em; color: var(--ink); }
.product-name p { margin: 7px 0 0; font-size: 13px; color: var(--slate); }
.product-description { margin: 30px 0 0; font-size: 16px; line-height: 1.9; color: var(--slate); }
.check-list {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
}
.check-list li {
  position: relative;
  padding-left: 22px;
  font-size: 13px;
  color: var(--navy);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--grad-brand);
}

/* 产品界面示意窗口 */
.product-window {
  margin: 38px 38px 38px 0;
  background: #fff;
  color: var(--ink);
  border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(45, 55, 92, 0.10);
  overflow: hidden;
}
.window-bar {
  height: 44px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 7px;
  background: #f7f8fc;
  border-bottom: 1px solid var(--line);
}
.window-bar > span { width: 9px; height: 9px; border-radius: 50%; background: #c7cfe0; }
.window-bar > span:first-child { background: var(--blue); }
.window-bar em {
  margin-left: auto;
  font-family: var(--utility);
  font-size: 8px;
  font-style: normal;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.window-body { min-height: 460px; display: grid; grid-template-columns: 148px 1fr; }
.window-body aside {
  padding: 22px 14px;
  background: #fafbff;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--line);
}
.mini-logo {
  margin-bottom: 26px;
  font-family: var(--utility);
  font-size: 26px;
  font-weight: 700;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mini-logo span { color: var(--violet); }
.window-body aside b {
  padding: 10px 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--slate);
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
}
.window-body aside b.active { color: var(--indigo); background: var(--bg-blue); border-color: var(--blue); }
.window-main { padding: 36px 28px; }
.window-title { display: flex; justify-content: space-between; align-items: flex-start; }
.window-title div { display: grid; gap: 6px; }
.window-title small, .config-card small, .window-grid small { font-size: 9px; color: var(--muted); }
.window-title strong { font-size: 22px; font-weight: 700; }
.window-title i { font-size: 9px; font-style: normal; color: var(--blue); }
.window-title i::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  border-radius: 50%;
  background: #2bc48a;
}
.config-card {
  margin-top: 34px;
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fafbff;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.config-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: none;
  color: #fff;
  background: linear-gradient(140deg, #25c6f7, #7468f8 64%, #d44df1);
  border-radius: 10px;
  font-family: var(--utility);
  font-weight: 600;
}
.config-card div { display: grid; gap: 4px; }
.config-card strong { font-family: var(--utility); font-size: 14px; font-weight: 600; }
.config-card em {
  margin-left: auto;
  padding: 5px 9px;
  background: #e1f7ef;
  color: #1e8b72;
  font-size: 8px;
  font-style: normal;
  border-radius: 999px;
}
.window-grid { margin-top: 14px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.window-grid > div {
  padding: 16px;
  display: grid;
  gap: 4px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.window-grid strong { font-family: var(--utility); font-size: 26px; font-weight: 700; color: var(--indigo); }
.window-grid span { font-size: 9px; color: var(--muted); }
.activity-line {
  margin-top: 22px;
  padding-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--line);
}
.activity-line > span { width: 8px; height: 8px; border-radius: 50%; background: #2bc48a; flex: none; }
.activity-line p { margin: 0; display: grid; gap: 3px; }
.activity-line b { font-size: 11px; }
.activity-line small { font-size: 8px; color: var(--muted); }
.activity-line time { margin-left: auto; font-size: 8px; color: var(--muted); }

/* 产品卡片网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 24px;
}
.product-grid article {
  min-height: 360px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.product-grid article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity 200ms ease;
}
.product-grid article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(61, 84, 255, 0.4);
}
.product-grid article:hover::before { opacity: 1; }
.product-tag {
  margin: 26px 0 7px;
  font-family: var(--utility);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--indigo);
}
.product-grid h3 { margin: 0; font-size: 23px; font-weight: 700; color: var(--ink); }
.product-grid article > p:not(.product-tag) {
  margin: 15px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}
.product-meta {
  margin-top: auto;
  padding-top: 20px;
  font-size: 11.5px;
  color: var(--indigo);
  border-top: 1px solid var(--line);
}

.product-symbol {
  position: relative;
  width: 64px;
  height: 64px;
  display: block;
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(0, 130, 255, 0.10), rgba(116, 62, 255, 0.06));
  border: 1px solid rgba(61, 84, 255, 0.22);
}
.product-symbol i { position: absolute; display: block; }
.installer-symbol i:nth-child(1), .installer-symbol i:nth-child(2), .installer-symbol i:nth-child(3) {
  width: 32px;
  height: 2px;
  left: 16px;
  background: var(--blue-deep);
  border-radius: 2px;
}
.installer-symbol i:nth-child(1) { top: 21px; }
.installer-symbol i:nth-child(2) { top: 31px; }
.installer-symbol i:nth-child(3) { top: 41px; }
.control-symbol { background: linear-gradient(145deg, rgba(116, 62, 255, 0.12), rgba(116, 62, 255, 0.04)); border-color: rgba(116, 62, 255, 0.28); }
.control-symbol i { width: 24px; height: 24px; border: 2px solid var(--violet); border-radius: 6px; }
.control-symbol i:nth-child(1) { top: 10px; left: 10px; background: var(--violet); }
.control-symbol i:nth-child(2) { top: 10px; right: 10px; }
.control-symbol i:nth-child(3) { bottom: 10px; left: 10px; }
.control-symbol i:nth-child(4) { bottom: 10px; right: 10px; }
.transfer-symbol i { width: 30px; height: 30px; border: 2px solid var(--blue-deep); border-radius: 6px; transform: rotate(45deg); }
.transfer-symbol i:nth-child(1) { left: 6px; top: 18px; }
.transfer-symbol i:nth-child(2) { right: 6px; top: 18px; }
.transfer-symbol i:nth-child(3) { left: 18px; top: 18px; background: var(--blue-deep); opacity: 0.22; }

/* ---------- 能力区 ---------- */
.capabilities {
  padding-block: 120px;
  background:
    radial-gradient(900px 500px at 100% 0%, rgba(61, 84, 255, 0.10), transparent 60%),
    linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}
.capabilities-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 96px;
}
.section-kicker.light { color: var(--indigo); }
.capability-intro { position: sticky; top: 110px; align-self: start; }
.capability-intro h2 { font-size: clamp(38px, 4.6vw, 58px); }
.capability-intro > p:last-child {
  max-width: 380px;
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}
.capability-list { border-top: 1px solid var(--line); }
.capability-list article {
  min-height: 210px;
  padding: 32px 0 32px 118px;
  position: relative;
  display: grid;
  align-content: start;
  border-bottom: 1px solid var(--line);
  transition: background 200ms ease;
}
.capability-list article:hover { background: var(--bg-blue); }
.capability-list article > span {
  position: absolute;
  left: 0;
  top: 36px;
  padding: 5px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--indigo);
  background: var(--bg-blue);
  border-radius: 999px;
}
.capability-list h3 { margin: 0; font-size: 24px; font-weight: 700; color: var(--ink); }
.capability-list p {
  max-width: 520px;
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}
.capability-list b {
  margin-top: 20px;
  font-family: var(--utility);
  font-size: 8px;
  letter-spacing: 0.18em;
  color: var(--violet);
}

/* ---------- 交付方式 ---------- */
.method { padding-block: 120px; }
.method-flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.method-flow li {
  min-height: 270px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.method-flow li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(61, 84, 255, 0.4);
}
.method-flow li > span {
  font-family: var(--utility);
  font-size: 14px;
  font-weight: 700;
  color: var(--indigo);
}
.method-flow li > div { margin-top: auto; }
.method-flow small { font-family: var(--utility); font-size: 8px; letter-spacing: 0.16em; color: var(--violet); }
.method-flow h3 { margin: 9px 0 0; font-size: 22px; font-weight: 700; color: var(--ink); }
.method-flow p { margin: 11px 0 0; font-size: 13.5px; line-height: 1.8; color: var(--slate); }

/* ---------- 关于 ---------- */
.about {
  padding-block: 100px 140px;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: center;
  gap: 100px;
}
.about-mark {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, #eef2ff, #f7f0ff);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about-mark::before, .about-mark::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(61, 84, 255, 0.22);
  border-radius: 50%;
}
.about-mark::before { inset: 12%; animation: spin 40s linear infinite; }
.about-mark::after { inset: 28%; border-color: rgba(116, 62, 255, 0.28); animation: spinReverse 30s linear infinite; }
.about-mark img { width: 40%; position: relative; z-index: 2; }
.about-mark > span {
  position: absolute;
  right: 16px;
  bottom: 12px;
  font-family: var(--utility);
  font-size: 13px;
  color: var(--indigo);
}
.about-copy > p:not(.section-kicker) {
  max-width: 680px;
  margin: 28px 0 0;
  font-size: 16px;
  line-height: 1.95;
  color: var(--slate);
}
.about-values { margin-top: 32px; display: flex; gap: 14px; }
.about-values span {
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--indigo);
  background: var(--bg-blue);
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* ---------- 合作区 ---------- */
.cooperate {
  padding: 116px 32px;
  color: #fff;
  background:
    radial-gradient(800px 500px at 88% 20%, rgba(116, 62, 255, 0.35), transparent 60%),
    radial-gradient(600px 420px at 8% 80%, rgba(0, 130, 255, 0.35), transparent 60%),
    linear-gradient(150deg, #1a2fa8, #4b2fb8 55%, #6a2fd8);
  position: relative;
  overflow: hidden;
}
.cooperate::after {
  content: "";
  position: absolute;
  width: 700px;
  height: 700px;
  right: -200px;
  top: -260px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  box-shadow: inset 0 0 0 90px rgba(255, 255, 255, 0.03), inset 0 0 0 180px rgba(255, 255, 255, 0.03);
  animation: spin 50s linear infinite;
  pointer-events: none;
}
.cooperate-shell { position: relative; z-index: 1; }
.cooperate h2 { max-width: 760px; font-size: clamp(42px, 6vw, 70px); color: #fff; }
.cooperate-shell > p:not(.section-kicker):not(.contact-note) {
  max-width: 580px;
  margin: 26px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}
.cooperate-actions { display: flex; align-items: center; gap: 18px; margin-top: 40px; }
.cooperate .button-light { color: var(--indigo); }
.button-light:hover span { transform: translate(3px, -3px); }
.contact-note { margin: 18px 0 0; font-size: 11.5px; color: rgba(255, 255, 255, 0.7); }

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 42px max(24px, calc((100vw - 1200px) / 2));
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  background: #f7f8fc;
  border-top: 1px solid var(--line);
}
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand img { width: 42px; height: 42px; }
.footer-brand div { display: grid; gap: 5px; }
.footer-brand strong { font-size: 14px; font-weight: 700; letter-spacing: 0.02em; color: var(--ink); }
.footer-brand small { font-family: var(--utility); font-size: 7px; letter-spacing: 0.15em; color: var(--muted); }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  font-size: 11px;
  color: var(--muted);
}
.footer-meta a[data-icp],
.footer-meta a {
  color: var(--muted);
  transition: color 160ms ease;
}
.footer-meta a:hover { color: var(--indigo); }
.footer-meta span[data-icp] img {
  display: inline-block;
  margin-right: 6px;
  vertical-align: -3px;
}

/* ---------- 入场动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 650ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 650ms cubic-bezier(0.2, 0.7, 0.2, 1);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ---------- 动效 ---------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spinReverse { to { transform: rotate(-360deg); } }
@keyframes breathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.04); } }
@keyframes pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1040px) {
  :root { --page: min(100% - 40px, 860px); }
  .hero { padding-top: 150px; }
  .hero-grid { grid-template-columns: 1fr 0.9fr; gap: 32px; }
  .growth-system { transform: scale(0.9); transform-origin: right center; }
  .product-feature { grid-template-columns: 1fr; }
  .product-story { min-height: auto; }
  .product-window { margin: 0 38px 38px; }
  .capabilities-shell { grid-template-columns: 1fr 1.3fr; gap: 52px; }
  .about { gap: 56px; }
}

@media (max-width: 760px) {
  :root { --page: calc(100vw - 32px); }
  .site-header { height: 62px; padding-inline: 16px; }
  .site-header.is-open { background: #fff; }
  .brand img { width: 33px; height: 33px; }
  .brand-copy strong { font-size: 15px; }
  .menu-toggle { width: 42px; height: 42px; display: grid; place-content: center; gap: 7px; }
  .menu-toggle > span:not(.sr-only) {
    width: 23px;
    height: 2px;
    display: block;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 180ms ease;
  }
  .menu-toggle[aria-expanded="true"] > span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }
  .site-nav {
    position: fixed;
    inset: 62px 0 auto;
    padding: 12px 16px 24px;
    display: grid;
    gap: 4px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(45, 55, 92, 0.10);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform 240ms ease, opacity 180ms ease;
  }
  .site-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .site-nav > a { padding: 13px 8px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .site-nav > a:not(.nav-cta):hover { background: transparent; }
  .nav-cta { margin: 14px 0 0; justify-self: start; }

  .hero { padding: 118px 16px 44px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: clamp(38px, 12vw, 52px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 12px; }
  .growth-system { width: min(112%, 460px); margin: 0 auto; transform: scale(1); }
  .system-node { padding: 7px 10px 7px 7px; }
  .system-node span { font-size: 9px; }
  .system-node small { font-size: 6px; }
  .system-core { width: 118px; height: 118px; }
  .system-core strong { font-size: 15px; }
  .proof-strip { grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 26px; }
  .proof-strip > div { padding: 16px; }
  .proof-strip strong { font-size: 19px; }

  .statement { padding-block: 88px; }
  .statement-text { font-size: 28px; }
  .products { padding-block: 76px 88px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; margin-bottom: 38px; }
  .section-heading h2, .about h2, .capability-intro h2 { font-size: 32px; }
  .product-story { padding: 30px 24px; }
  .product-name { margin-top: 36px; }
  .product-name h3 { font-size: 34px; }
  .check-list { grid-template-columns: 1fr; }
  .product-window { margin: 0; border-radius: 0 0 12px 12px; }
  .window-body { grid-template-columns: 76px 1fr; min-height: 380px; }
  .window-body aside { padding: 16px 7px; }
  .mini-logo { margin-bottom: 20px; }
  .window-body aside b { padding: 8px 6px; font-size: 7px; }
  .window-main { padding: 22px 16px; }
  .window-title strong { font-size: 17px; }
  .config-card { padding: 13px; margin-top: 24px; }
  .config-card strong { font-size: 10px; }
  .config-icon { width: 34px; height: 34px; border-radius: 8px; }
  .window-grid { grid-template-columns: 1fr; }
  .window-grid > div { padding: 12px; }
  .window-grid strong { font-size: 21px; }
  .activity-line { display: none; }
  .product-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 16px; }
  .product-grid article { min-height: 280px; padding: 28px; }

  .capabilities { padding-block: 88px; }
  .capabilities-shell { grid-template-columns: 1fr; gap: 52px; }
  .capability-intro { position: static; }
  .capability-list article { padding-left: 0; padding-top: 72px; }
  .capability-list article > span { top: 26px; }

  .method { padding-block: 88px; }
  .method-flow { grid-template-columns: 1fr 1fr; gap: 14px; }
  .method-flow li { min-height: 230px; padding: 22px; }
  .about { padding-block: 30px 96px; grid-template-columns: 1fr; gap: 44px; }
  .about-mark { width: min(100%, 360px); }
  .about-values { flex-wrap: wrap; gap: 10px; }
  .cooperate { padding: 88px 18px; }
  .cooperate h2 { font-size: 40px; }
  .cooperate-actions { align-items: stretch; flex-direction: column; }
  .site-footer { padding: 30px 18px; align-items: flex-start; flex-direction: column; gap: 22px; }
  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 430px) {
  .hero h1 { font-size: 35px; }
  .growth-system { width: 110%; margin-left: -5%; }
  .proof-strip strong { font-size: 17px; }
  .section-heading h2, .about h2, .capability-intro h2 { font-size: 30px; }
  .method-flow { grid-template-columns: 1fr; }
  .method-flow li { min-height: 200px; }
}

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