/* ============================================================
   知千唯官网 · 样式
   设计语言：简约 · 大气 · 优雅
   ============================================================ */

:root {
  --bg: #FAF9F7;
  --bg-band: #F4F2ED;
  --surface: #FFFFFF;
  --ink: #1B2430;
  --ink-2: #55606E;
  --ink-3: #8B95A3;
  --line: #E8E5DF;
  --primary: #1C3D5A;
  --primary-2: #2A5478;
  --primary-soft: #EEF3F7;
  --accent: #B08D57;
  --accent-light: #D8B98A;
  --accent-soft: #F5F0E6;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-h: 72px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  --shadow-md: 0 16px 40px rgba(23, 43, 66, .10);
  --radius: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { padding-top: var(--header-h); }

a { color: inherit; }

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

.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

.icon { flex-shrink: 0; }

/* ================= 头部导航 ================= */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(250, 249, 247, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s, box-shadow .3s;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  background: rgba(250, 249, 247, .96);
  box-shadow: 0 1px 12px rgba(16, 24, 40, .03);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-mark { width: 38px; height: 38px; }
.brand-name {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--ink);
}

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--ink-2);
  text-decoration: none;
  letter-spacing: .04em;
  border-radius: 8px;
  transition: color .25s;
}
.site-nav a:hover { color: var(--primary); }
.site-nav a.active { color: var(--primary); font-weight: 500; }
.site-nav a.active::after {
  content: '';
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.header-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ================= 按钮 ================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: 8px;
  font-size: 15px;
  font-family: var(--sans);
  letter-spacing: .05em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-2); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(28, 61, 90, .25); }
.btn-ghost { background: transparent; color: var(--primary); border-color: #D5DDE6; }
.btn-ghost:hover { border-color: var(--primary); background: var(--surface); }
.btn-outline { background: var(--surface); border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(0, 0, 0, .25); }
.btn-sm { height: 38px; padding: 0 20px; font-size: 14px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none !important; }

/* ================= 首页 Hero ================= */

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(720px 480px at 88% 12%, rgba(28, 61, 90, .06), transparent 62%),
    radial-gradient(560px 420px at 6% 92%, rgba(176, 141, 87, .05), transparent 60%),
    var(--bg);
}
.hero-watermark {
  position: absolute;
  right: -5vw;
  top: 50%;
  transform: translateY(-52%);
  font-family: var(--serif);
  font-size: min(44vw, 520px);
  line-height: 1;
  color: #F0EEE9;
  user-select: none;
  pointer-events: none;
  z-index: 0;
}
.hero-inner { position: relative; z-index: 1; padding: 96px 28px; }
.hero-kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  letter-spacing: .32em;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 26px;
}
.kicker-line { display: block; width: 34px; height: 1px; background: var(--accent); }
.hero-title {
  font-family: var(--serif);
  font-size: clamp(58px, 9vw, 108px);
  font-weight: 600;
  letter-spacing: .14em;
  line-height: 1.15;
  color: var(--ink);
}
.hero-slogan {
  font-family: var(--serif);
  font-size: clamp(20px, 2.8vw, 30px);
  letter-spacing: .28em;
  color: var(--primary);
  margin-top: 22px;
  font-weight: 500;
}
.hero-desc {
  max-width: 600px;
  margin-top: 30px;
  font-size: 16px;
  line-height: 2;
  color: var(--ink-2);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 44px; }

/* ================= 数据条 ================= */

.stats-strip {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 58px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item { text-align: center; padding: 4px 16px; }
.stat-item + .stat-item { border-left: 1px solid var(--line); }
.stat-value {
  font-family: var(--serif);
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 600;
  color: var(--primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--ink-3);
}

/* ================= 区块 ================= */

.section { padding: 100px 0; }
.section-band { background: var(--bg-band); }

.section-head { text-align: center; max-width: 660px; margin: 0 auto 60px; }
.section-kicker {
  font-size: 12px;
  letter-spacing: .38em;
  color: var(--accent);
  font-weight: 600;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 600;
  letter-spacing: .05em;
  margin: 16px 0 14px;
  color: var(--ink);
}
.section-sub { color: var(--ink-2); line-height: 1.9; font-size: 15px; }
.section-more { text-align: center; margin-top: 52px; }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.mt-2 { margin-top: 12px; }
.mt-4 { margin-top: 36px; }

/* ================= 产品卡片 ================= */

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px 30px;
  text-decoration: none;
  color: inherit;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: #D8E2EC;
}
.product-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}
.product-no {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 600;
  color: #E5E1D8;
  line-height: 1;
}
.icon-tile {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .3s, color .3s;
}
.product-card:hover .icon-tile { background: var(--primary); color: #fff; }
.product-name { font-size: 20px; font-weight: 600; letter-spacing: .02em; margin-bottom: 6px; }
.product-subtitle { font-size: 13.5px; color: var(--accent); letter-spacing: .04em; margin-bottom: 12px; }
.product-desc {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.85;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-link {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}
.product-link svg { transition: transform .25s; }
.product-card:hover .product-link svg,
.news-card:hover .product-link svg { transform: translateX(4px); }

/* ================= 工具卡片 ================= */

.tool-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 26px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #D8E2EC; }
.tool-card-lg { align-items: start; }
.tool-icon {
  width: 64px; height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary-2), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(28, 61, 90, .22);
}
.tool-body { min-width: 0; }
.tool-name { font-size: 22px; font-weight: 600; letter-spacing: .03em; }
.tool-subtitle { font-size: 14px; color: var(--accent); margin: 6px 0 12px; letter-spacing: .04em; }
.tool-desc { font-size: 14.5px; color: var(--ink-2); line-height: 1.9; }
.tool-rich { margin-top: 18px; font-size: 14px; }
.tool-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag {
  font-size: 12.5px;
  padding: 5px 13px;
  border-radius: 999px;
  background: #F3F1EC;
  border: 1px solid var(--line);
  color: var(--ink-2);
  letter-spacing: .03em;
}
.tag-primary { background: var(--primary-soft); color: var(--primary); border-color: #DCE6EF; }
.tool-soon { font-size: 13px; color: var(--ink-3); letter-spacing: .12em; }

/* ================= 价值观卡片 ================= */

.value-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); border-color: #D8E2EC; }
.value-icon {
  width: 48px; height: 48px;
  border-radius: 13px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.value-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; letter-spacing: .04em; }
.value-card p { font-size: 14px; color: var(--ink-2); line-height: 1.85; }

/* ================= 新闻 ================= */

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #D8E2EC; }
.news-cover {
  height: 172px;
  background-size: cover;
  background-position: center;
  background-color: #EAE7E0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #B9B4A8;
}
.news-cover-ph { background: linear-gradient(135deg, #EFECE5, #E3DED4); }
.news-body { padding: 24px 26px 28px; display: flex; flex-direction: column; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 13px; font-size: 12.5px; color: var(--ink-3); }
.news-date { font-variant-numeric: tabular-nums; letter-spacing: .05em; }
.news-cat {
  color: var(--accent);
  border: 1px solid #EADFC9;
  background: #FBF7EF;
  padding: 3px 11px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .03em;
}
.news-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.55;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-summary {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.85;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-body .product-link { margin-top: 18px; }

/* 新闻列表页 */
.news-feature {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  margin-bottom: 40px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.news-feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #D8E2EC; }
.news-feature-cover {
  min-height: 330px;
  background-size: cover;
  background-position: center;
  background-color: #EAE7E0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #B9B4A8;
}
.news-feature-body { padding: 48px 44px; display: flex; flex-direction: column; justify-content: center; }
.news-feature-body h2 {
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 600;
  line-height: 1.5;
  margin: 14px 0;
}
.news-feature-body p { color: var(--ink-2); line-height: 1.95; margin-bottom: 22px; font-size: 14.5px; }

.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-row {
  display: grid;
  grid-template-columns: 190px 1fr auto;
  gap: 26px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px 20px 20px;
  text-decoration: none;
  color: inherit;
  transition: border-color .3s, box-shadow .3s;
}
.news-row:hover { border-color: #D8E2EC; box-shadow: var(--shadow-sm); }
.news-row-cover {
  height: 100px;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
  background-color: #EAE7E0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #B9B4A8;
}
.news-row-body { min-width: 0; }
.news-row-body h3 { font-size: 19px; font-weight: 600; margin: 8px 0; }
.news-row-body p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-row-arrow { color: #C9C4B8; transition: color .3s, transform .3s; }
.news-row:hover .news-row-arrow { color: var(--primary); transform: translateX(4px); }

/* ================= CTA 横幅 ================= */

.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #152C44 0%, #1C3D5A 55%, #24507A 100%);
  color: #fff;
  padding: 88px 0;
}
.cta-band::before,
.cta-band::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .07);
}
.cta-band::before { width: 420px; height: 420px; right: -120px; top: -160px; }
.cta-band::after { width: 300px; height: 300px; right: 40px; bottom: -180px; }
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  flex-wrap: wrap;
}
.cta-text h2 {
  font-family: var(--serif);
  font-size: clamp(25px, 3vw, 35px);
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.5;
}
.cta-text p { margin-top: 14px; color: rgba(255, 255, 255, .72); font-size: 15px; line-height: 1.9; }

/* ================= 页脚 ================= */

.site-footer { background: #141D27; color: rgba(255, 255, 255, .62); padding-top: 76px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 60px; }
.site-footer .brand-name { color: #fff; }
.footer-slogan { color: var(--accent-light); letter-spacing: .24em; font-size: 13.5px; margin: 20px 0 12px; }
.footer-desc { font-size: 13.5px; line-height: 1.95; color: rgba(255, 255, 255, .5); }
.footer-col h4 { font-size: 15px; color: #fff; font-weight: 600; letter-spacing: .1em; margin-bottom: 22px; }
.footer-col a { display: block; padding: 7px 0; font-size: 14px; color: rgba(255, 255, 255, .58); text-decoration: none; transition: color .25s; }
.footer-col a:hover { color: #fff; }
.footer-contact { list-style: none; }
.footer-contact li { display: flex; gap: 11px; align-items: flex-start; padding: 7px 0; font-size: 14px; line-height: 1.7; }
.footer-contact svg { color: var(--accent-light); margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); }
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}

/* ================= 子页头部 ================= */

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 68px;
  background: linear-gradient(180deg, var(--bg-band), var(--bg));
  border-bottom: 1px solid var(--line);
}
.page-hero-watermark {
  position: absolute;
  right: 2vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--serif);
  font-size: min(24vw, 260px);
  line-height: 1;
  color: #EFEDE7;
  user-select: none;
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb { font-size: 13px; color: var(--ink-3); margin-bottom: 20px; }
.breadcrumb a { text-decoration: none; transition: color .25s; }
.breadcrumb a:hover { color: var(--primary); }
.crumb-sep { margin: 0 9px; color: #C9C4B8; }
.page-hero-title {
  font-family: var(--serif);
  font-size: clamp(32px, 4.4vw, 50px);
  font-weight: 600;
  letter-spacing: .07em;
}
.page-hero-desc { margin-top: 18px; color: var(--ink-2); max-width: 680px; line-height: 1.95; font-size: 15px; }

/* ================= 筛选 ================= */

.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.filter-chip {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 13.5px;
  font-family: var(--sans);
  color: var(--ink-2);
  cursor: pointer;
  transition: all .25s;
  letter-spacing: .03em;
}
.filter-chip:hover { border-color: var(--primary); color: var(--primary); }
.filter-chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ================= 详情页 ================= */

.detail-grid { display: grid; grid-template-columns: 1fr 340px; gap: 52px; align-items: start; }
.detail-meta { display: flex; align-items: center; gap: 16px; margin-bottom: 30px; font-size: 13px; color: var(--ink-3); }
.detail-date { display: inline-flex; align-items: center; gap: 6px; }
.detail-cover {
  height: 400px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  background-color: #EAE7E0;
  border: 1px solid var(--line);
  margin-bottom: 40px;
}
.detail-side { position: sticky; top: calc(var(--header-h) + 24px); }

.rich-content { font-size: 15.5px; line-height: 2.05; color: #3A4450; }
.rich-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 42px 0 18px;
  padding-left: 15px;
  border-left: 3px solid var(--accent);
  letter-spacing: .03em;
}
.rich-content h3:first-child { margin-top: 0; }
.rich-content p { margin-bottom: 18px; }
.rich-content ul, .rich-content ol { padding-left: 1.5em; margin-bottom: 18px; }
.rich-content li { margin-bottom: 9px; }
.rich-content strong { color: var(--ink); font-weight: 600; }
.rich-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.rich-content img { max-width: 100%; border-radius: 12px; margin: 22px 0; }
.rich-content blockquote {
  border-left: 3px solid var(--line);
  padding: 4px 0 4px 20px;
  color: var(--ink-2);
  margin: 22px 0;
}

.side-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  margin-bottom: 26px;
}
.side-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  letter-spacing: .04em;
}
.feature-list { list-style: none; }
.feature-list li { display: flex; gap: 13px; padding: 13px 0; border-bottom: 1px dashed #EFEDE7; }
.feature-list li:last-child { border-bottom: none; padding-bottom: 0; }
.feature-list strong { display: block; font-size: 14.5px; margin-bottom: 4px; }
.feature-list p { font-size: 13px; color: var(--ink-2); line-height: 1.75; }
.feature-icon { color: var(--accent); margin-top: 3px; }

.side-card-cta { background: linear-gradient(160deg, #1F4468, #152C44); border: none; color: #fff; }
.side-card-cta .side-card-title { border-bottom-color: rgba(255, 255, 255, .14); }
.side-card-cta p { color: rgba(255, 255, 255, .7); font-size: 13.5px; line-height: 1.85; margin-bottom: 22px; }
.side-card-cta .btn-outline { background: transparent; border-color: rgba(255, 255, 255, .32); color: #fff; }
.side-card-cta .btn-outline:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .08); }

/* ================= 关于我们 ================= */

.about-grid { display: grid; grid-template-columns: 1fr 1.35fr; gap: 60px; align-items: start; }
.about-lead { position: sticky; top: calc(var(--header-h) + 32px); }
.about-lead-text {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 600;
  line-height: 1.75;
  color: var(--primary);
  letter-spacing: .08em;
  padding-left: 26px;
  border-left: 3px solid var(--accent);
}
.mission-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 32px;
  transition: transform .3s, box-shadow .3s;
}
.mission-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.mission-card h3 { font-size: 18px; font-weight: 600; margin: 18px 0 12px; letter-spacing: .05em; }
.mission-card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.95; }

.timeline { position: relative; max-width: 880px; margin: 0 auto; padding: 12px 0; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 1px;
  background: var(--line);
}
.timeline-item { position: relative; width: 50%; padding: 0 48px 44px 0; }
.timeline-item-right { margin-left: 50%; padding: 0 0 44px 48px; }
.timeline-dot {
  position: absolute;
  top: 8px;
  right: -5.5px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1px var(--line);
  z-index: 1;
}
.timeline-item-right .timeline-dot { right: auto; left: -5.5px; }
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 26px;
  transition: border-color .3s, box-shadow .3s;
}
.timeline-card:hover { border-color: #D8E2EC; box-shadow: var(--shadow-sm); }
.timeline-year {
  display: block;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: .05em;
}
.timeline-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.timeline-card p { font-size: 13.5px; color: var(--ink-2); line-height: 1.85; }

/* ================= 联系我们 ================= */

.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 52px; align-items: start; }
.contact-card {
  display: flex;
  gap: 17px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  margin-bottom: 16px;
  transition: border-color .3s, box-shadow .3s;
}
.contact-card:hover { border-color: #D8E2EC; box-shadow: var(--shadow-sm); }
.contact-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-label { font-size: 12.5px; color: var(--ink-3); letter-spacing: .12em; margin-bottom: 6px; }
.contact-value { font-size: 15px; color: var(--ink); font-weight: 500; line-height: 1.65; text-decoration: none; }
a.contact-value:hover { color: var(--primary); }

.contact-form-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 42px 40px;
  box-shadow: 0 12px 40px rgba(23, 43, 66, .06);
}
.contact-form-title { font-size: 23px; font-weight: 600; letter-spacing: .03em; }
.contact-form-sub { font-size: 13.5px; color: var(--ink-3); margin: 10px 0 30px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: 13.5px; color: var(--ink-2); margin-bottom: 9px; font-weight: 500; letter-spacing: .03em; }
.form-field label i { color: var(--accent); font-style: normal; margin-left: 2px; }
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 15px;
  font-size: 14.5px;
  font-family: var(--sans);
  background: #FCFCFB;
  color: var(--ink);
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(28, 61, 90, .08);
}
.form-field textarea { resize: vertical; line-height: 1.75; min-height: 120px; }
.form-tip { margin-top: 16px; font-size: 13.5px; text-align: center; letter-spacing: .03em; }
.form-tip.ok { color: #2E7D4F; }
.form-tip.err { color: #C0504A; }

/* ================= 文章页 ================= */

.article-wrap { max-width: 780px; margin: 0 auto; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--ink-3);
  font-size: 13.5px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-back { margin-top: 52px; text-align: center; }

/* ================= 其它 ================= */

.empty-state { text-align: center; padding: 90px 0; color: var(--ink-3); font-size: 15px; letter-spacing: .06em; }

.notfound { text-align: center; padding: 150px 0; }
.notfound-code {
  font-family: var(--serif);
  font-size: clamp(90px, 16vw, 180px);
  font-weight: 600;
  color: #E7E4DC;
  line-height: 1;
}
.notfound-title { font-size: 24px; font-weight: 600; margin: 10px 0 16px; letter-spacing: .06em; }
.notfound-desc { color: var(--ink-3); margin-bottom: 40px; }

/* ================= 滚动渐显 ================= */

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.22, .61, .36, 1), transform .8s cubic-bezier(.22, .61, .36, 1); }
.reveal.visible { opacity: 1; transform: none; }

/* ================= 响应式 ================= */

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-lead { position: static; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .news-feature { grid-template-columns: 1fr; }
  .news-feature-cover { min-height: 220px; }
  .news-feature-body { padding: 34px 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 860px) {
  .site-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-nav.open {
    display: flex;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    padding: 10px 28px 20px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(16, 24, 40, .08);
  }
  .site-nav.open a { padding: 15px 4px; border-bottom: 1px solid #F1EFEA; border-radius: 0; }
  .site-nav.open a:last-child { border-bottom: none; }
  .site-nav.open a.active::after { display: none; }
  .site-nav.open a.active { color: var(--primary); }
  .header-actions .btn-primary { display: none; }
}

@media (max-width: 720px) {
  .section { padding: 72px 0; }
  .stats-strip { padding: 44px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 0; }
  .stat-item:nth-child(3) { border-left: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .tool-card { grid-template-columns: 1fr; gap: 18px; }
  .tool-action { width: 100%; }
  .tool-action .btn { width: 100%; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .news-row { grid-template-columns: 110px 1fr; }
  .news-row-arrow { display: none; }
  .news-row-cover { height: 76px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-form-card { padding: 30px 24px; }
  .hero-inner { padding: 72px 28px; }
  .page-hero { padding: 64px 0 52px; }
  .detail-cover { height: 230px; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ================= 小程序二维码 ================= */

/* 工具卡片二维码列 */
.tool-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.tool-qr img {
  width: 96px;
  height: 96px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 6px;
}
.tool-qr-hint {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .14em;
  white-space: nowrap;
}

/* 首页扫码体验专区 */
.qr-band { background: linear-gradient(180deg, #FBF9F5 0%, #F4F1EA 100%); }
.qr-inner {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 64px;
  align-items: center;
}
.qr-text .section-kicker { margin-bottom: 18px; }
.qr-text .section-title { text-align: left; }
.qr-text .section-title::after { margin-left: 0; }
.qr-desc {
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.9;
  margin: 18px 0 26px;
  max-width: 520px;
}
.qr-points {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.qr-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-2);
}
.qr-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.qr-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow-md);
  max-width: 320px;
  margin-left: auto;
}
.qr-card-frame {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
}
.qr-card-frame img {
  display: block;
  width: 100%;
  height: auto;
}
.qr-card-hint {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-3);
  letter-spacing: .18em;
}

/* 产品详情侧栏二维码 */
.side-qr {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  margin-bottom: 14px;
}
.side-qr img { display: block; width: 100%; height: auto; }
.side-qr-hint { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; }

@media (max-width: 960px) {
  .qr-inner { grid-template-columns: 1fr; gap: 36px; }
  .qr-card { margin: 0 auto; }
}
@media (max-width: 720px) {
  .tool-card { grid-template-columns: 1fr; gap: 18px; }
  .tool-qr { flex-direction: row; justify-content: flex-start; }
  .tool-qr img { width: 80px; height: 80px; }
}

/* ================= 产品详情页二维码 ================= */

/* ---------- 产品详情：小程序码入口 ---------- */
.qr-trigger {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  padding: 12px 22px 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  text-align: left;
  transition: border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}
.qr-trigger:hover {
  border-color: var(--accent-light);
  box-shadow: 0 8px 24px rgba(28, 61, 90, .08);
  transform: translateY(-1px);
}
.qr-trigger-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #EDF6EF 0%, #DCEDE2 100%);
  color: #07C160;
  flex: none;
}
.qr-trigger-text { display: flex; flex-direction: column; gap: 3px; }
.qr-trigger-text strong { font-size: 15px; font-weight: 600; color: var(--ink); letter-spacing: .04em; }
.qr-trigger-text em { font-style: normal; font-size: 13px; color: var(--ink-2); }
.qr-trigger-arrow { color: var(--ink-3); transition: transform .25s ease, color .25s ease; }
.qr-trigger:hover .qr-trigger-arrow { transform: translateX(3px); color: var(--accent); }

/* ---------- 小程序码弹窗 ---------- */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  visibility: hidden;
  opacity: 0;
  transition: opacity .25s ease, visibility .25s ease;
}
.qr-modal.open { visibility: visible; opacity: 1; }
.qr-mask {
  position: absolute;
  inset: 0;
  background: rgba(20, 38, 54, .55);
}
.qr-dialog {
  position: relative;
  width: min(320px, 100%);
  padding: 38px 28px 28px;
  background: var(--surface);
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(15, 30, 45, .25);
  transform: translateY(12px) scale(.97);
  transition: transform .25s ease;
}
.qr-modal.open .qr-dialog { transform: translateY(0) scale(1); }
.qr-close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--ink-3);
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}
.qr-close:hover { background: var(--bg-band); color: var(--ink); }
.qr-dialog-title { margin-bottom: 6px; font-size: 19px; color: var(--ink); }
.qr-dialog-sub { margin-bottom: 20px; font-size: 14px; color: var(--ink-2); }
.qr-dialog-img {
  padding: 14px;
  background: #FBF9F5;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.qr-dialog-img img {
  display: block;
  width: 220px;
  height: 220px;
  margin: 0 auto;
  border-radius: 10px;
  background: #fff;
}
.qr-dialog-hint { margin-top: 16px; font-size: 12.5px; color: var(--ink-3); letter-spacing: .04em; }

@media (max-width: 720px) {
  .qr-trigger { width: 100%; }
  .qr-dialog-img img { width: 180px; height: 180px; }
}