/* ==========================================================================
 * Conexuai 官网 · 首页样式（只服务 / 与 /en/ 两页，其余四页仍用 site.css）
 * --------------------------------------------------------------------------
 * 字体：Outfit 400/600/700 + Geist Mono 400 自托管拉丁子集（OFL，许可证随附在 fonts/），
 * 同源加载，零外部请求；中文回落系统字体栈。
 *
 * 主题：默认跟随系统 prefers-color-scheme；页头太阳/月亮按钮写入偏好后，
 * <head> 里的 boot.js 在首帧前设 data-theme，避免闪烁。深色值同时写在
 * 媒体查询与 [data-theme="dark"] 两处——没有脚本时也照样跟随系统。
 * ========================================================================== */

@font-face { font-family: "Outfit"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(/assets/fonts/outfit-latin-400-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Outfit"; font-style: normal; font-weight: 600; font-display: swap;
  src: url(/assets/fonts/outfit-latin-600-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Outfit"; font-style: normal; font-weight: 700; font-display: swap;
  src: url(/assets/fonts/outfit-latin-700-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Geist Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(/assets/fonts/geist-mono-latin-400-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  --sans: "Outfit", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --gutter: clamp(16px, 4.45vw, 64px);

  --accent: #FF4A1D;
  --accent-hover: #D63A12;
  --on-accent: #17181A;
  --bg: #F7F8F7;
  --fg: #17181A;
  --fg-2: #3A3C40;
  --muted: #6B6E73;
  --line: #D8DAD8;
  --surface: #FFFFFF;
  --surface-2: #F0F1F0;
  --chat: #FAFBFA;
  --ok: #2F9E6B;
  --warn: #D97706;
  --warn-bg: #FFF8EC;
  --warn-line: #F1D6A8;
  --shadow: 0 24px 60px rgba(23, 24, 26, 0.08);
  /* 炭底分区（第二屏 / 申请区） */
  --ink: #17181A;
  --ink-fg: #F7F8F7;
  --ink-line: #3A3C40;
  --ink-note: #1F2124;
  --ink-note-fg: #D8DAD8;
  --ink-sub: #B8BBB8;
  /* 第三方图标里有纯黑件，深色态垫一块浅底，图标文件字节不动 */
  --ico-bg: transparent;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17181A; --fg: #F7F8F7; --fg-2: #A0A3A8; --muted: #8A8D93; --line: #2C2F33;
    --surface: #1E2023; --surface-2: #26282B; --chat: #1A1C1F;
    --warn-bg: rgba(217, 119, 6, 0.12); --warn-line: rgba(217, 119, 6, 0.4);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    --ink: #1E2023; --ink-line: #2C2F33; --ink-note: #26282B; --ink-sub: #A0A3A8;
    --ico-bg: #F7F8F7;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17181A; --fg: #F7F8F7; --fg-2: #A0A3A8; --muted: #8A8D93; --line: #2C2F33;
  --surface: #1E2023; --surface-2: #26282B; --chat: #1A1C1F;
  --warn-bg: rgba(217, 119, 6, 0.12); --warn-line: rgba(217, 119, 6, 0.4);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --ink: #1E2023; --ink-line: #2C2F33; --ink-note: #26282B; --ink-sub: #A0A3A8;
  --ico-bg: #F7F8F7;
  color-scheme: dark;
}

/* 字标与日/月图标随主题二选一 */
.on-dark { display: none !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .on-light { display: none !important; }
  :root:not([data-theme="light"]) .on-dark { display: block !important; }
}
:root[data-theme="dark"] .on-light { display: none !important; }
:root[data-theme="dark"] .on-dark { display: block !important; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--sans); font-size: 16px; line-height: 1.55;
  overflow-wrap: anywhere;
}
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3, p { margin: 0; }
.mono { font-family: var(--mono); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; background: var(--surface); color: var(--fg); padding: 12px; border: 1px solid var(--line); border-radius: 8px; }
.skip:focus { left: 16px; top: 16px; z-index: 10; }
.ico { display: block; flex-shrink: 0; background: var(--ico-bg); border-radius: 3px; }
section[id] { scroll-margin-top: 8px; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 24px; border-radius: 8px;
  font: inherit; font-size: 16px; font-weight: 600; text-decoration: none; cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--on-accent); border: 0; }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); }
.btn-ghost { border: 1px solid var(--fg); color: var(--fg); background: transparent; font-weight: 500; padding: 0 22px; }
.btn-ghost:hover { color: var(--fg); background: var(--surface-2); }

/* ---- 页头 ---- */
.hd {
  min-height: 72px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
  gap: 16px 32px; padding: 12px var(--gutter);
}
.brand { display: inline-flex; flex-direction: column; align-items: stretch; gap: 4px; text-decoration: none; flex-shrink: 0; }
.brand img { height: 22px; width: auto; }
/* 反白字标的 viewBox 四周多 60 单位底框；放大同等比例再用负边距收回，字形与浅色版等大 */
.brand img.on-dark { height: 25.85px; margin: -1.85px; }
/* 口号逐字撑满字标宽度：每个字符一格，space-between 分布 */
.tagline { display: flex; justify-content: space-between; width: 100%; font-family: var(--mono); font-size: 10px; color: var(--muted); line-height: 1; }
.nav { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; font-size: 15px; font-weight: 500; }
.nav-links { display: contents; }
.nav-links a { color: var(--fg); text-decoration: none; }
.nav-links a:hover { color: var(--accent); }
.tools { display: inline-flex; align-items: center; gap: 6px; }
.tool {
  height: 32px; min-width: 32px; padding: 0 10px; border-radius: 8px; border: 1px solid var(--line);
  background: transparent; color: var(--fg); font-family: var(--mono); font-size: 12px;
  display: inline-flex; align-items: center; justify-content: center; text-decoration: none; cursor: pointer;
}
.tool:hover { color: var(--fg); background: var(--surface-2); }
.tool-icon { width: 32px; padding: 0; }
.cta-sm { height: 40px; padding: 0 18px; font-size: 15px; }

/* ---- 通用分区 ---- */
.sec { padding: clamp(48px, 30.2px + 4.57vw, 96px) var(--gutter); }
.sec + .sec { border-top: 1px solid var(--line); }
.in { max-width: 1312px; margin: 0 auto; display: flex; flex-direction: column; gap: 40px; }
.h2 { font-size: clamp(26px, 22.3px + 0.952vw, 36px); font-weight: 600; line-height: 1.25; }
.note {
  padding: 16px 20px; border-left: 3px solid var(--accent); background: var(--bg);
  font-size: 15px; line-height: 1.65; color: var(--fg-2); max-width: 900px;
}
.note strong { color: var(--fg); }

/* ---- 首屏 ---- */
.hero {
  display: flex; flex-wrap: wrap; align-items: center; gap: 48px;
  padding: clamp(40px, 29.7px + 2.67vw, 72px) var(--gutter) clamp(32px, 16.8px + 3.9vw, 72px);
  max-width: 1440px; margin: 0 auto;
}
.hero-text { flex: 1 1 520px; min-width: 0; max-width: 640px; display: flex; flex-direction: column; gap: 28px; }
.hero h1 { font-size: clamp(34px, 3.6vw, 52px); line-height: 1.15; font-weight: 700; letter-spacing: -0.01em; }
.hero-lead { font-size: clamp(17px, 15.9px + 0.29vw, 20px); line-height: 1.6; color: var(--fg-2); max-width: 600px; }
.clients { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; font-size: 13px; color: var(--fg-2); }
.clients span { display: inline-flex; align-items: center; gap: 7px; }
.clients .ico { width: 18px; height: 18px; }
.clients .more { color: var(--muted); }
.ctas { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 4px; }
.hero .note { font-size: 14px; max-width: 600px; }

/* ---- 模拟群卡（示意，非实时数据） ---- */
.hero-demo { flex: 1 1 480px; min-width: 0; max-width: 620px; display: flex; justify-content: center; }
.chat {
  width: 100%; max-width: 600px; margin: 0; background: var(--surface); border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
}
.chat-hd { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 12px 20px; border-bottom: 1px solid var(--line); }
.chat-title { display: flex; align-items: center; gap: 10px; min-width: 0; font-weight: 600; font-size: 15px; }
.grid4 {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--line); background: #FFFFFF;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px; padding: 3px; flex-shrink: 0;
}
.grid4 img { width: 9px; height: 9px; display: block; margin: auto; }
.chat-meta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: 8px; padding: 3px; font-size: 13px; }
.seg span { padding: 4px 12px; color: var(--muted); }
.seg .on { border-radius: 6px; background: var(--surface); color: var(--fg); font-weight: 600; box-shadow: 0 1px 2px rgba(23, 24, 26, 0.08); }
.live { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--fg-2); }
.live i { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); display: inline-block; }
.chat-body { display: flex; flex-direction: column; gap: 16px; padding: 18px 20px; background: var(--chat); }
.msg { display: flex; gap: 10px; align-items: flex-start; }
.av {
  width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--line); background: #FFFFFF;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.av img { width: 16px; height: 16px; }
.av-me { background: var(--fg); border-color: var(--fg); color: var(--bg); font-size: 13px; font-weight: 600; }
.msg-main { display: flex; flex-direction: column; gap: 6px; min-width: 0; flex: 1; }
.msg-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; font-size: 13px; color: var(--muted); }
.msg-meta strong { color: var(--fg); }
.msg-text { font-size: 15px; line-height: 1.55; }
.arrive { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); padding: 10px 14px; display: flex; flex-direction: column; gap: 8px; }
.arrive-hd { font-size: 12px; font-weight: 600; color: var(--fg-2); }
.arrive-list { display: flex; flex-wrap: wrap; gap: 14px; font-size: 12px; color: var(--muted); }
.arrive-list span { display: inline-flex; align-items: center; gap: 5px; }
.arrive-list .ico { width: 12px; height: 12px; }
.gate { display: flex; flex-direction: column; gap: 10px; background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; padding: 14px 16px; }
.gate-hd { font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.gate-text { font-size: 14px; color: var(--fg-2); }
.gate-acts { display: flex; flex-wrap: wrap; gap: 10px; }
/* 示意卡里的按钮与输入框只是画面，不可点、不可聚焦 */
.fake-btn { display: inline-flex; align-items: center; height: 36px; padding: 0 16px; border-radius: 8px; font-size: 14px; font-weight: 600; }
.fake-btn.pri { background: var(--accent); color: var(--on-accent); }
.fake-btn.sec2 { border: 1px solid var(--fg); color: var(--fg); font-weight: 500; }
.chat-ft { display: flex; align-items: center; gap: 10px; padding: 12px 20px; border-top: 1px solid var(--line); background: var(--surface); }
.fake-input {
  flex: 1 1 auto; min-width: 0; height: 40px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg);
  padding: 0 14px; font-size: 14px; color: var(--muted); display: flex; align-items: center; white-space: nowrap; overflow: hidden;
}
.fake-send { width: 40px; height: 40px; border-radius: 8px; background: #17181A; color: #F7F8F7; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }

/* ---- 第二屏 · 炭底 ---- */
.sec-ink { background: var(--ink); color: var(--ink-fg); padding-block: clamp(40px, 25.1px + 3.81vw, 80px); }
.sec-ink + .sec { border-top: 0; }
.sec-ink .note { background: var(--ink-note); color: var(--ink-note-fg); }
.sec-ink .note strong { color: var(--ink-fg); }
.pains { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: clamp(14px, 11.3px + 0.67vw, 24px); }
.pain { display: flex; flex-direction: column; gap: 14px; padding: 28px; border: 1px solid var(--ink-line); border-radius: 12px; }
.pain .mono { font-size: 12px; color: var(--accent); }
.pain p { font-size: 18px; line-height: 1.6; }

/* ---- 第三屏 · 四价值卡 ---- */
#how .in { gap: 48px; }
.h2-sub { font-size: clamp(18px, 15px + 0.76vw, 24px); font-weight: 500; color: var(--fg-2); white-space: nowrap; }
.values { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr)); gap: clamp(14px, 11.3px + 0.67vw, 24px); }
.value { display: flex; flex-direction: column; gap: 16px; padding: clamp(24px, 21.3px + 0.76vw, 32px); background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
.value h3 { font-size: 22px; font-weight: 600; line-height: 1.35; }
.value p { font-size: 16px; line-height: 1.65; color: var(--fg-2); }

/* ---- 第四屏 · 四「不是」 ---- */
.nots { display: flex; flex-direction: column; }
.not { display: flex; flex-wrap: wrap; gap: 24px; padding: 32px 0; border-top: 1px solid var(--line); }
.not:last-child { border-bottom: 1px solid var(--line); }
.not h3 { flex: 0 1 360px; min-width: 0; font-size: 22px; font-weight: 600; line-height: 1.35; }
.not p { flex: 1 1 480px; min-width: 0; font-size: 17px; line-height: 1.65; color: var(--fg-2); }

/* ---- 第五屏 · 白底 ---- */
.sec-white { background: var(--surface); }
.sec-white .h2 { max-width: 900px; }
.lead { font-size: clamp(16px, 15.3px + 0.19vw, 18px); line-height: 1.65; color: var(--fg-2); max-width: 820px; }
.trio { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: clamp(14px, 9.2px + 1.71vw, 32px); }
.trio div { display: flex; flex-direction: column; gap: 12px; }
.trio h3 { font-size: 20px; font-weight: 600; }
.trio p { font-size: 16px; line-height: 1.65; color: var(--fg-2); }
.sec-white .note { padding: 20px 24px; }

/* ---- 第六段 · 故事 + 八席矩阵 ---- */
#story .in { max-width: 900px; gap: 24px; }
.story { font-size: clamp(16px, 14.9px + 0.29vw, 19px); line-height: 1.7; color: var(--fg-2); }
.sign { margin-top: 8px; font-size: 16px; font-weight: 600; }
.matrix { margin-top: 16px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-family: var(--mono); font-size: 13px; }
.matrix div { display: grid; grid-template-columns: 1.2fr 1.4fr 2fr; gap: 8px; padding: 8px 16px; border-top: 1px solid var(--line); }
.matrix div:first-child { padding-block: 10px; border-top: 0; background: var(--surface-2); color: var(--muted); }

/* ---- 申请内测 ---- */
.apply { background: var(--ink); color: var(--ink-fg); padding: clamp(40px, 25.1px + 3.81vw, 80px) var(--gutter); }
.apply .in { flex-direction: row; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 32px; }
.apply-text { display: flex; flex-direction: column; gap: 10px; }
.apply h2 { font-size: clamp(24px, 21px + 0.76vw, 32px); font-weight: 600; }
.apply-text p { font-size: 16px; color: var(--ink-sub); }
.apply form { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.apply input {
  height: 48px; width: 320px; max-width: 100%; border-radius: 8px; border: 1px solid var(--ink-line);
  background: #FFFFFF; padding: 0 16px; font: inherit; font-size: 15px; color: #17181A;
}
.apply button { border: 0; }

/* ---- 页脚 ---- */
.ft { padding: clamp(32px, 26.1px + 1.52vw, 48px) var(--gutter); border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 32px; }
.apply + .ft { border-top: 0; }
.ft-l { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; max-width: 720px; }
.ft-l img { height: 20px; width: auto; }
.ft-l img.on-dark { height: 23.5px; margin: -1.75px; }
.ft-tag { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: 0.04em; }
.ft-cn { font-size: 16px; font-weight: 500; }
.ft-fact { margin-top: 6px; font-size: 13px; color: var(--fg-2); }
.ft-r { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; font-size: 12px; color: var(--muted); text-align: right; }
.ft-r span { max-width: 420px; line-height: 1.5; }
.ft-r a { color: var(--muted); text-decoration: none; }
.ft-r a:hover { color: var(--accent); }

/* ---- 窄屏：对齐手机端板；点击目标不小于 44px ---- */
@media (max-width: 959px) {
  .nav-links { display: none; }
  .nav { gap: 8px; flex-wrap: nowrap; }
}
@media (max-width: 719px) {
  .hd { min-height: 60px; padding-block: 8px; gap: 12px; flex-wrap: nowrap; }
  .hd { gap: 8px; }
  /* 英文页的按钮更宽：字标按剩余宽度等比缩小，按钮文字不折行 */
  .brand { min-height: 44px; justify-content: center; flex: 0 1 140px; min-width: 104px; }
  .brand img { height: auto; width: 100%; }
  .brand img.on-dark { width: 102.03%; margin: -1.016%; max-width: none; }
  .tool, .cta-sm { white-space: nowrap; }
  .tool { height: 44px; min-width: 44px; padding: 0 8px; }
  .tool-icon { width: 44px; padding: 0; }
  .nav .tools { gap: 6px; }
  .cta-sm { height: 44px; padding: 0 12px; font-size: 13px; }
  .hero { gap: 32px; }
  .hero h1 br { display: none; }
  .hero-text { flex-basis: 100%; }
  .h2-sub { display: block; }
  .not h3 { flex-basis: 100%; }
  .matrix { font-size: 12px; }
  .matrix div { grid-template-columns: 1fr 1.2fr 1.6fr; padding-inline: 12px; }
  .apply form, .apply input { width: 100%; }
  .ft { align-items: flex-start; }
  .ft-r { align-items: flex-start; text-align: left; }
  .ft-r a { display: inline-flex; align-items: center; min-height: 44px; }
}
@media (max-width: 400px) {
  .tagline { font-size: 9px; }
}