/* 杭州楚维智元科技有限公司 — cwmi.tech
   纸本 + 朱砂印。无外部字体、无 CDN，全部自持。 */

:root {
  --ink:      #14161a;
  --ink-2:    #454a52;
  --ink-3:    #7b818b;
  --paper:    #fbfaf7;
  --paper-2:  #f3f1ea;
  --line:     #e3e0d7;
  --line-2:   #cfcbbe;
  --seal:     #a8321f;
  --seal-ink: #86271a;
  --seal-bg:  rgba(168, 50, 31, 0.07);

  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, "Segoe UI", Roboto, sans-serif;
  --mono:  ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1080px;
  --gut: 28px;
}

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

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

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gut); }

/* ---------- 页眉 ---------- */

.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 20px; }

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.seal {
  width: 34px; height: 34px; flex: none;
  background: var(--seal); color: #fff;
  border-radius: 4px;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 21px; line-height: 1;
  padding-bottom: 1px;
  box-shadow: 0 1px 2px rgba(20, 22, 26, 0.18);
}
.brand-name { font-family: var(--serif); font-size: 18px; letter-spacing: 0.12em; line-height: 1.2; }
.brand-en { font-size: 10px; letter-spacing: 0.18em; color: var(--ink-3); text-transform: uppercase; line-height: 1.2; }

.nav { display: flex; align-items: center; gap: 30px; font-size: 14px; color: var(--ink-2); }
.nav a { position: relative; padding-block: 4px; transition: color 0.2s; }
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--seal); transition: right 0.28s ease;
}
.nav a:hover { color: var(--seal); }
.nav a:hover::after { right: 0; }
@media (max-width: 720px) { .nav { display: none; } }

/* ---------- 首屏 ---------- */

.hero { padding-block: 104px 76px; border-bottom: 1px solid var(--line); }
.eyebrow {
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 28px;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(38px, 6.6vw, 68px);
  line-height: 1.22; letter-spacing: 0.02em;
  font-weight: 600; margin: 0 0 28px;
}
.hero h1 em { font-style: normal; color: var(--seal); }
.lede { max-width: 40em; font-size: 17px; color: var(--ink-2); margin: 0 0 38px; }

.actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 3px; font-size: 14.5px;
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.btn:hover { background: var(--seal); border-color: var(--seal); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn.ghost:hover { border-color: var(--ink); background: transparent; color: var(--ink); }

/* 事实条 */
.facts { display: flex; flex-wrap: wrap; gap: 0 52px; margin-top: 56px; }
.facts div { padding-top: 14px; border-top: 2px solid var(--ink); }
.facts dt { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); }
.facts dd { margin: 4px 0 0; font-family: var(--serif); font-size: 19px; }

/* ---------- 章节 ---------- */

section { padding-block: 84px; border-bottom: 1px solid var(--line); }
.sec-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 46px; }
.sec-num {
  font-family: var(--mono); font-size: 12px; color: var(--seal);
  letter-spacing: 0.08em; padding-top: 6px;
}
.sec-head h2 { font-family: var(--serif); font-size: clamp(24px, 3.4vw, 32px); font-weight: 600; margin: 0; letter-spacing: 0.04em; }
.sec-head p { margin: 6px 0 0; font-size: 13.5px; color: var(--ink-3); letter-spacing: 0.06em; }

/* ---------- 产品 ---------- */

.products { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 780px) { .products { grid-template-columns: 1fr; } }

.card { background: var(--paper); padding: 34px 32px; display: flex; flex-direction: column; transition: background 0.25s; }
.card:hover { background: #fff; }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 6px; }
.card h3 { font-family: var(--serif); font-size: 23px; font-weight: 600; margin: 0; letter-spacing: 0.02em; }
.card h3 span { font-size: 15px; color: var(--ink-3); margin-left: 10px; letter-spacing: 0.04em; }
.card .plat { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.06em; margin-bottom: 16px; }
.card p { margin: 0 0 22px; font-size: 14.5px; color: var(--ink-2); }
.card .foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.tag {
  font-size: 11px; letter-spacing: 0.1em; padding: 4px 10px; border-radius: 2px;
  border: 1px solid var(--line-2); color: var(--ink-3); white-space: nowrap;
}
.tag.live { border-color: var(--seal); color: var(--seal); background: var(--seal-bg); }
.card .link { font-size: 13px; color: var(--seal); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.card .link:hover { border-color: var(--seal); }

/* ---------- 主张 ---------- */

.tenets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
@media (max-width: 780px) { .tenets { grid-template-columns: 1fr; gap: 34px; } }
.tenet h3 { font-family: var(--serif); font-size: 19px; font-weight: 600; margin: 0 0 12px; padding-top: 16px; border-top: 2px solid var(--ink); letter-spacing: 0.04em; }
.tenet p { margin: 0; font-size: 14.5px; color: var(--ink-2); }

/* ---------- 企业信息 ---------- */

.registry { border: 1px solid var(--line); background: #fff; }
.registry .band { height: 3px; background: var(--seal); }
.registry .body { padding: 36px 34px; }
@media (max-width: 600px) { .registry .body { padding: 26px 20px; } }

.reg-head { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 20px; padding-bottom: 26px; margin-bottom: 26px; border-bottom: 1px solid var(--line); }
.reg-head h3 { font-size: 20px; font-weight: 600; margin: 0 0 6px; letter-spacing: 0.01em; }
.reg-head .zh { font-family: var(--serif); font-size: 17px; color: var(--ink-2); margin: 0; }
.status { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--seal); border: 1px solid var(--seal); background: var(--seal-bg); padding: 6px 13px; border-radius: 2px; white-space: nowrap; }
.status i { width: 6px; height: 6px; border-radius: 50%; background: var(--seal); display: block; }

.reg-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px 40px; }
@media (max-width: 600px) { .reg-grid { grid-template-columns: 1fr; } }
.reg-grid .full { grid-column: 1 / -1; }
.reg-grid dt { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 7px; }
.reg-grid dd { margin: 0; font-size: 15px; }
.reg-grid dd.code { font-family: var(--mono); font-size: 15px; letter-spacing: 0.04em; }
.reg-grid dd.addr { font-size: 14.5px; line-height: 1.7; }
.reg-grid dd .en { display: block; color: var(--ink-3); font-size: 13px; margin-top: 4px; }

/* ---------- 联系 ---------- */

.contact { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 780px) { .contact { grid-template-columns: 1fr; gap: 32px; } }
.mail { font-family: var(--serif); font-size: clamp(24px, 4vw, 34px); color: var(--ink); border-bottom: 2px solid var(--seal); padding-bottom: 4px; }
.mail:hover { color: var(--seal); }
.contact p { color: var(--ink-2); font-size: 15px; }
.contact .rows dt { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); }
.contact .rows dd { margin: 5px 0 20px; font-size: 14.5px; }

/* ---------- 页脚 ---------- */

footer { background: var(--ink); color: #a7adb7; padding-block: 52px; font-size: 13.5px; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; }
footer .zh { font-family: var(--serif); color: #f0eee9; font-size: 15px; margin: 0 0 6px; letter-spacing: 0.04em; }
footer .en { margin: 0; color: #818994; font-size: 12.5px; }
footer nav { display: flex; gap: 24px; align-items: flex-start; }
footer nav a { color: #a7adb7; border-bottom: 1px solid transparent; transition: color 0.2s, border-color 0.2s; }
footer nav a:hover { color: #fff; border-color: #6d7480; }
footer .copy { width: 100%; padding-top: 22px; border-top: 1px solid #272b31; color: #6d7480; font-size: 12px; }

/* ---------- 文档页（支持 / 隐私） ---------- */

.doc { padding-block: 76px 96px; }
.doc-head { padding-bottom: 30px; margin-bottom: 42px; border-bottom: 2px solid var(--ink); }
.doc-head h1 { font-family: var(--serif); font-size: clamp(30px, 5vw, 44px); font-weight: 600; margin: 0 0 10px; letter-spacing: 0.03em; }
.doc-head .meta { font-size: 13px; color: var(--ink-3); letter-spacing: 0.06em; }
.doc article { max-width: 46em; }
.doc h2 { font-family: var(--serif); font-size: 22px; font-weight: 600; margin: 46px 0 14px; letter-spacing: 0.03em; }
.doc h2:first-child { margin-top: 0; }
.doc h3 { font-size: 16px; font-weight: 600; margin: 26px 0 8px; }
.doc p, .doc li { color: var(--ink-2); font-size: 15px; }
.doc ul { padding-left: 1.25em; }
.doc li { margin-bottom: 8px; }
.doc li::marker { color: var(--seal); }
.doc a { color: var(--seal); border-bottom: 1px solid var(--line-2); }
.doc a:hover { border-color: var(--seal); }
.doc strong { color: var(--ink); font-weight: 600; }
.callout { background: var(--paper-2); border-left: 3px solid var(--seal); padding: 20px 24px; margin: 28px 0; }
.callout p { margin: 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14.5px; }
.doc th, .doc td { text-align: left; padding: 11px 14px; border: 1px solid var(--line); vertical-align: top; }
.doc th { background: var(--paper-2); font-weight: 600; color: var(--ink); font-size: 13px; letter-spacing: 0.04em; }
.doc td { color: var(--ink-2); }
.back { display: inline-block; margin-bottom: 30px; font-size: 13.5px; color: var(--ink-3); }
.back:hover { color: var(--seal); }