/* ==========================================================================
   北京算脉科技有限公司 官网样式
   品牌色：深蓝底 #0E2148 / 主蓝 #163D7A / 强调红 #D43A2F / 米白 #F5F2EA
   页脚底 #0B0F14
   ========================================================================== */

:root {
  --ink:      #0E2148;   /* 页面底色 */
  --blue:     #163D7A;   /* 卡片 / 强调区块 */
  --red:      #D43A2F;   /* 强调色 */
  --paper:    #F5F2EA;   /* 主文字 */
  --night:    #0B0F14;   /* 页脚底色 */

  --p90: rgba(245,242,234,.90);
  --p85: rgba(245,242,234,.85);
  --p75: rgba(245,242,234,.75);
  --p72: rgba(245,242,234,.72);
  --p60: rgba(245,242,234,.60);
  --p50: rgba(245,242,234,.50);
  --p45: rgba(245,242,234,.45);
  --p25: rgba(245,242,234,.25);
  --p16: rgba(245,242,234,.16);
  --p12: rgba(245,242,234,.12);

  /* 设计稿用 Noto Sans SC + Sora（Google Fonts）。生产环境不引用
     fonts.googleapis.com——大陆网络下经常阻塞，会拖住整页文字渲染。
     改用系统字体栈，视觉上与 Noto Sans SC 接近且零网络开销。 */
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
          system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --latin: "Sora", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
           "Helvetica Neue", Arial, sans-serif;

  --maxw: 1240px;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main { flex: 1; }

a { color: var(--paper); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--red); }
::selection { background: var(--red); color: var(--paper); }

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

h1, h2, h3 { margin: 0; letter-spacing: .02em; }
p { margin: 0; text-wrap: pretty; }
img, svg { max-width: 100%; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

/* 拉丁小标签：Sora 的替代表现——大字距、小字号 */
.eyebrow {
  font-family: var(--latin);
  font-size: 12px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--p55, rgba(245,242,234,.55));
  display: block;
}
.eyebrow-red { color: var(--red); font-weight: 600; }
.mono { font-family: var(--latin); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--red); color: var(--paper); padding: 12px 20px;
}
.skip-link:focus { left: 0; color: var(--paper); }

/* ========================= 页头 ========================= */
.site-header { border-bottom: 1px solid transparent; }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px 32px; flex-wrap: wrap; padding-block: 18px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand .mark { display: block; width: 34px; height: 34px; flex-shrink: 0; fill: var(--paper); }
.brand .names { display: flex; align-items: baseline; gap: 10px; }
.brand .cn { font-size: 19px; font-weight: 700; letter-spacing: .1em; }
.brand .en { font-family: var(--latin); font-size: 11px; letter-spacing: .25em; color: var(--p60); }

.nav { display: flex; align-items: center; gap: 12px 22px; font-size: 14px; flex-wrap: wrap; }
.nav a { color: var(--p72); }
.nav a:hover { color: var(--red); }
.nav a[aria-current="page"] { color: var(--paper); font-weight: 700; }

.lang-switch {
  font-family: var(--latin); font-size: 12px; letter-spacing: .08em;
  color: rgba(245,242,234,.55); border: 1px solid var(--p25); padding: 5px 10px;
}
.lang-switch:hover { color: var(--paper); border-color: var(--p60); }

.nav-cta { border: 1px solid rgba(245,242,234,.4); padding: 9px 20px; font-size: 13px; }
/* 选择器必须压过 `.nav a:hover { color: var(--red) }`（后者 specificity 更高）。
   否则 hover 时红底 + 红字，按钮「业务咨询」会完全看不见。 */
.nav a.nav-cta:hover,
.nav a.nav-cta:focus-visible {
  background: var(--red);
  border-color: var(--red);
  color: var(--paper);
}

/* ========================= 通用区块 ========================= */
.section { padding-block: clamp(44px, 7vw, 72px); }
.section--rule { border-bottom: 1px solid var(--p16); }
.section--top-rule { border-top: 1px solid var(--p16); }

/* 页面头部（内页 h1 区） */
.page-head { display: flex; flex-direction: column; gap: 18px; padding-block: clamp(36px,6vw,64px) clamp(32px,5vw,56px); }
.page-head h1 { font-size: clamp(30px, 5.5vw, 48px); font-weight: 900; letter-spacing: .04em; }
.page-head p { max-width: 640px; font-size: 16px; line-height: 1.9; color: var(--p72); }

/* 带英文小标的标题行 */
.head-row { display: flex; align-items: baseline; gap: 20px; margin-bottom: 44px; flex-wrap: wrap; }
.head-row h2 { font-size: clamp(24px, 4vw, 30px); font-weight: 700; }
.head-row .eyebrow { font-size: 12px; letter-spacing: .25em; color: var(--p50); }

/* 两栏：左说明 + 右清单 */
.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
  gap: 48px;
}
.split__intro { display: flex; flex-direction: column; gap: 14px; }
.split__intro h2 { font-size: clamp(24px, 4vw, 30px); font-weight: 700; }
.split__intro p { font-size: 15px; line-height: 1.9; color: var(--p72); }
.split__intro .num { font-family: var(--latin); font-size: 14px; color: var(--red); font-weight: 600; }
.split__intro .sub { font-family: var(--latin); font-size: 11px; letter-spacing: .18em; color: var(--p50); }

/* 圆点清单 */
.bullets { display: flex; flex-direction: column; }
.bullets li {
  display: flex; gap: 16px; padding-block: 20px;
  border-bottom: 1px solid var(--p12); list-style: none;
}
.bullets li:last-child { border-bottom: none; }
.bullets .dot { width: 8px; height: 8px; background: var(--red); margin-top: 9px; flex-shrink: 0; }
.bullets span:last-child { font-size: 15px; line-height: 1.8; color: var(--p85); }
.bullets, .bullets li { margin: 0; padding-inline: 0; }

/* 编号清单 */
.numbered { display: flex; flex-direction: column; margin: 0; padding: 0; }
.numbered li {
  display: flex; gap: 16px; padding-block: 20px;
  border-bottom: 1px solid var(--p12); list-style: none;
}
.numbered li:last-child { border-bottom: none; }
.numbered .idx { font-family: var(--latin); font-size: 13px; color: var(--red); margin-top: 2px; flex-shrink: 0; }
.numbered span:last-child { font-size: 15px; line-height: 1.8; color: var(--p85); }

/* 要点条目（方块 + 标题 + 说明） */
.points { display: flex; flex-direction: column; margin: 0; padding: 0; }
.points li {
  display: flex; gap: 20px; padding-block: 24px;
  border-bottom: 1px solid var(--p12); list-style: none;
}
.points li:last-child { border-bottom: none; }
.points .sq { width: 10px; height: 10px; background: var(--red); margin-top: 8px; flex-shrink: 0; }
.points .body { display: flex; flex-direction: column; gap: 6px; }
.points strong { font-size: 17px; font-weight: 700; }
.points .body span { font-size: 14px; line-height: 1.8; color: rgba(245,242,234,.7); }

/* ========================= 首页 ========================= */
.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 48px; align-items: center;
  padding-block: clamp(40px, 7vw, 72px) clamp(40px, 7vw, 64px);
}
.hero__text { display: flex; flex-direction: column; gap: 26px; }
.hero__text .eyebrow { font-size: 12px; letter-spacing: .32em; color: rgba(245,242,234,.55); }
.hero h1 { font-size: clamp(36px, 6vw, 64px); line-height: 1.18; font-weight: 900; letter-spacing: .04em; }
.hero p { max-width: 520px; font-size: 16px; line-height: 1.9; color: var(--p72); }
.hero__actions { display: flex; gap: 16px; margin-top: 6px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; font-size: 15px; font-weight: 500;
  font-family: inherit; border: 1px solid transparent; cursor: pointer;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.btn-primary { background: var(--red); color: var(--paper); }
.btn-primary:hover { background: #B92F26; color: var(--paper); }
.btn-ghost { border-color: rgba(245,242,234,.4); color: var(--paper); }
.btn-ghost:hover { border-color: var(--paper); color: var(--paper); }

/* 事实条 */
.facts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
  gap: 16px 32px; padding-block: 22px; font-size: 13px; color: var(--p60);
}
.facts div { display: flex; gap: 12px; align-items: baseline; }
.facts b { color: var(--paper); font-weight: 500; }
.facts .num { font-family: var(--latin); font-weight: 600; }

/* 服务卡 */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr)); gap: 24px; }
.card {
  background: var(--blue); padding: 36px 30px 40px;
  display: flex; flex-direction: column; gap: 16px;
  border-top: 2px solid transparent; color: var(--paper);
}
a.card:hover { border-top-color: var(--red); color: var(--paper); }
.card .idx { font-family: var(--latin); font-size: 13px; color: var(--p50); }
.card h3 { font-size: 21px; font-weight: 700; }
.card .sub { font-family: var(--latin); font-size: 11px; letter-spacing: .18em; color: var(--p50); }
.card p { font-size: 14px; line-height: 1.9; color: var(--p75); }
.card .sq { width: 10px; height: 10px; background: var(--red); }
.card .lines { display: flex; flex-direction: column; gap: 10px; font-size: 14px; line-height: 1.8; color: var(--p75); }

/* 行内链接（带下划线的"了解更多 →"） */
.link-arrow {
  font-size: 14px; border-bottom: 1px solid rgba(245,242,234,.4);
  align-self: flex-start; padding-bottom: 3px;
}
.link-arrow:hover { color: var(--red); border-color: var(--red); }

/* ========================= 流程网格 ========================= */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.step { background: var(--blue); padding: 24px 18px; display: flex; flex-direction: column; gap: 10px; }
.step .n { font-family: var(--latin); font-size: 12px; color: var(--p50); }
.step .n--hl { color: var(--red); }
.step strong { font-size: 15px; font-weight: 700; }
.step span:last-child { font-size: 12px; line-height: 1.7; color: rgba(245,242,234,.65); }

/* ========================= 公司信息网格 ========================= */
.info-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 1px; background: var(--p16); border: 1px solid var(--p16);
}
.info-grid div { background: var(--ink); padding: 26px 28px; display: flex; flex-direction: column; gap: 8px; }
.info-grid dt { font-size: 12px; color: var(--p50); margin: 0; }
.info-grid dd { font-size: 16px; font-weight: 500; margin: 0; }
.info-grid dd.mono { letter-spacing: .06em; }
.info-note { margin-top: 20px; font-size: 13px; color: var(--p50); }

/* ========================= 声明框 ========================= */
.statement {
  border: 1px solid var(--p25); padding: clamp(24px, 4vw, 40px);
  display: flex; flex-direction: column; gap: 14px;
}
.statement p { font-size: 17px; line-height: 2; color: var(--p90); max-width: 900px; }

/* ========================= CTA 条 ========================= */
.cta-band { background: var(--blue); }
.cta-band .wrap {
  padding-block: clamp(36px, 6vw, 64px);
  display: flex; align-items: center; justify-content: space-between;
  gap: 40px; flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(22px, 3.5vw, 26px); font-weight: 700; }
.cta-band .cta-text { display: flex; flex-direction: column; gap: 12px; }
.cta-band .cta-text p { font-size: 14px; color: rgba(245,242,234,.7); }
.mail-link {
  font-family: var(--latin); font-size: clamp(17px, 3vw, 22px); font-weight: 600;
  border-bottom: 2px solid var(--red); padding-bottom: 6px; align-self: flex-start;
  overflow-wrap: anywhere;
}
.mail-link:hover { color: var(--red); }

/* ========================= 关于 / 招聘 ========================= */
.panel {
  background: var(--blue); padding: clamp(28px, 5vw, 48px) clamp(22px, 4vw, 40px);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 48px; align-items: center;
}
.panel__col { display: flex; flex-direction: column; gap: 14px; }
.panel h2 { font-size: clamp(24px, 4vw, 30px); font-weight: 700; }
.panel p { font-size: 15px; line-height: 1.9; color: var(--p75); }

.mini-card {
  background: var(--blue); padding: 32px 30px;
  display: flex; flex-direction: column; gap: 10px;
}
.mini-card strong { font-size: 18px; }
.mini-card p { font-size: 14px; line-height: 1.8; color: var(--p75); }

/* ========================= 联系页 ========================= */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 24px;
}
.contact-main {
  background: var(--blue); padding: clamp(26px, 5vw, 44px) clamp(22px, 4vw, 40px);
  display: flex; flex-direction: column; gap: 20px; justify-content: center;
}
.contact-main .notes { display: flex; flex-direction: column; gap: 8px; font-size: 14px; line-height: 1.8; color: var(--p75); }
.contact-side { display: flex; flex-direction: column; gap: 24px; }
.contact-box {
  border: 1px solid rgba(245,242,234,.22); padding: 32px;
  display: flex; flex-direction: column; gap: 10px;
}
.contact-box strong { font-size: 17px; }
.contact-box .addr { font-size: 14px; line-height: 1.8; color: var(--p75); }
.contact-box .hint { font-size: 13px; color: var(--p50); }

/* ========================= 标识动画舞台 ========================= */
.logo-stage { display: flex; justify-content: center; }
.logo-stage svg { width: clamp(240px, 30vw, 340px); height: auto; overflow: visible; }
.logo-stage--sm svg { width: clamp(200px, 24vw, 260px); }

/* 动画元素的 transform 要以自身为原点，否则 scale 会绕 SVG 原点跑飞 */
[data-logo] [data-node] { transform-box: fill-box; transform-origin: center; }

/* ========================= 页脚 ========================= */
.site-footer { background: var(--night); color: var(--paper); margin-top: auto; }
.site-footer .wrap {
  padding-block: clamp(36px, 6vw, 56px) 32px;
  display: flex; flex-direction: column; gap: 40px;
}
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-lockup { display: flex; align-items: center; gap: 14px; }
.footer-lockup .mark { width: 44px; height: 44px; fill: var(--paper); flex-shrink: 0; }
.footer-lockup .cn { font-size: 20px; font-weight: 700; letter-spacing: .1em; display: block; }
.footer-lockup .en { font-family: var(--latin); font-size: 11px; letter-spacing: .25em; color: var(--p45); display: block; }

.footer-cols { display: flex; gap: 64px; font-size: 13px; flex-wrap: wrap; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col .h { color: var(--p45); }
.footer-col a { color: rgba(245,242,234,.8); }
.footer-col a:hover { color: var(--red); }
.footer-col .addr { color: rgba(245,242,234,.8); max-width: 280px; line-height: 1.7; }

.footer-bottom {
  border-top: 1px solid rgba(245,242,234,.14); padding-top: 20px;
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  font-size: 12px; color: var(--p45);
}
.footer-bottom .right { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-bottom a { color: var(--p45); }

/* ========================= 404 ========================= */
.notfound { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; padding-block: clamp(60px, 12vw, 140px); }
.notfound .code { font-family: var(--latin); font-size: clamp(64px, 14vw, 140px); font-weight: 700; line-height: 1; color: var(--red); }
.notfound h1 { font-size: clamp(24px, 4vw, 32px); font-weight: 700; }
.notfound p { font-size: 15px; color: var(--p72); max-width: 46ch; }

/* ========================= 响应式 ========================= */
@media (max-width: 720px) {
  .footer-cols { gap: 32px; }
  .footer-top { gap: 32px; }
  .cta-band .wrap { align-items: flex-start; }
}

/* 设计稿的页头是 flex-wrap，窄屏下导航自然换行。默认字号在 375px 上
   会让页头吃掉近 300px 高度，把首屏标题挤下去——这里只收紧字号与间距，
   不改换行策略，也不引入设计稿里没有的汉堡菜单。 */
@media (max-width: 560px) {
  .site-header .wrap { padding-block: 14px; gap: 12px 16px; }
  .brand .mark { width: 28px; height: 28px; }
  .brand .cn { font-size: 17px; }
  .brand .en { font-size: 10px; letter-spacing: .2em; }
  .nav { gap: 10px 16px; font-size: 13px; width: 100%; }
  .nav-cta { padding: 7px 14px; font-size: 12px; }
  .lang-switch { padding: 4px 8px; font-size: 11px; }
  .facts { gap: 10px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

@media print {
  .site-header, .nav, .cta-band { display: none; }
  body { background: #fff; color: #000; }
}