/* ==========================================================================
   ICP 备案站点 · 全局样式
   纯静态，不依赖任何外部资源（无 CDN / 无 Web Font / 无外链图片）
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --bg-sink: #eef2f9;
  --text: #161d2b;
  --text-mid: #4a5468;
  --text-muted: #808b9e;
  --border: #e4e8f0;
  --border-soft: #eef1f6;
  --brand: #1f4bd8;
  --brand-dark: #1839a8;
  --brand-soft: #eaefff;
  --accent: #0e9f8c;
  --warn: #d9622b;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(22, 29, 43, .04), 0 8px 24px rgba(22, 29, 43, .06);
  --shadow-hover: 0 2px 6px rgba(22, 29, 43, .06), 0 16px 40px rgba(22, 29, 43, .10);
  --wrap: 1120px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑",
          "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; line-height: 1.35; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.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;
}

/* ---------------------------------------------------------------- 顶部导航 */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 66px;
}

/* 左上角：公司简称 / LOGO */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
  white-space: nowrap;
}
.brand:hover { color: var(--text); text-decoration: none; }
.brand__mark { flex: none; display: block; }
.brand__sub {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .16em;
  padding-left: 10px;
  margin-left: 2px;
  border-left: 1px solid var(--border);
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  display: block;
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-mid);
  font-size: 15px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.nav a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); font-weight: 600; }

/* ------------------------------------------------------------------ 主视觉 */

.hero {
  background:
    radial-gradient(900px 380px at 12% -10%, #e7ecff 0%, rgba(231, 236, 255, 0) 62%),
    radial-gradient(700px 340px at 92% 0%, #e3f7f3 0%, rgba(227, 247, 243, 0) 60%),
    var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 64px;
}
.hero__eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  padding: 5px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
}
.hero h1 { font-size: 38px; letter-spacing: -.02em; }
.hero h1 span { color: var(--brand); }
.hero__lead {
  margin-top: 18px;
  max-width: 30em;
  color: var(--text-mid);
  font-size: 16px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero__art { display: block; width: 100%; height: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: var(--brand-dark); color: #fff; }
.btn--ghost { background: #fff; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: #c9d2e4; color: var(--text); }

/* ------------------------------------------------------------------ 版块头 */

section { padding: 60px 0; }
section.tint { background: var(--bg-soft); }

.section-head { margin-bottom: 30px; }
.section-head__row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head h2 { font-size: 25px; }
.section-head p { margin-top: 8px; color: var(--text-muted); font-size: 14px; }
.section-head__more { font-size: 14px; font-weight: 600; white-space: nowrap; }

/* -------------------------------------------------------------- 图文卡片组 */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.showcase {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow .2s, transform .2s;
}
.showcase:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.showcase__media { display: block; width: 100%; height: auto; background: var(--bg-sink); }
.showcase__body { padding: 20px 22px 24px; }
.showcase__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  border-radius: 5px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
}
.showcase h3 { font-size: 17px; }
.showcase p { margin-top: 8px; color: var(--text-mid); font-size: 14px; }

/* ---------------------------------------------------------- 资讯 · 文章卡片 */

.article-list { display: grid; gap: 18px; }

.article {
  position: relative;
  padding: 24px 26px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(22, 29, 43, .03);
  transition: box-shadow .2s, border-color .2s;
}
.article:hover { border-color: #d5dcea; box-shadow: var(--shadow); }

.article__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}
.article__meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 12.5px;
}
.article__cat {
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg-sink);
  color: var(--text-mid);
  font-weight: 600;
}
.article__dot { color: var(--border); }

/* 摘要固定 3 行，超出省略 —— 对应参考图“2-3 行文章内容” */
.article__excerpt {
  margin-top: 12px;
  color: var(--text-mid);
  font-size: 14.5px;
  line-height: 1.85;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article__foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* “付费阅读，3元/篇” 触发按钮 */
.pay-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px 6px 10px;
  border: 1px solid #f0d7c4;
  border-radius: 7px;
  background: #fff7f1;
  color: var(--warn);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.pay-btn:hover { background: #ffefe2; border-color: #e6bfa3; }
.pay-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.pay-btn svg { flex: none; }

.article__hint { color: var(--text-muted); font-size: 12.5px; }

/* ------------------------------------------------------------ 关于我们内容 */

.about-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 40px;
  align-items: start;
}
.prose p + p { margin-top: 14px; }
.prose p { color: var(--text-mid); font-size: 15px; }
.prose h3 { margin-top: 28px; margin-bottom: 10px; font-size: 17px; color: var(--text); }

.feature-list { display: grid; gap: 14px; margin-top: 18px; }
.feature-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text-mid);
  font-size: 14.5px;
}
.feature-list b { display: block; color: var(--text); font-size: 15px; margin-bottom: 2px; }
.feature-list .bullet {
  flex: none;
  width: 8px; height: 8px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--brand);
}

.info-card {
  padding: 26px 26px 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.info-card h3 { font-size: 17px; margin-bottom: 16px; }
.info-list { display: grid; gap: 14px; }
.info-list div {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  font-size: 14.5px;
}
.info-list dt { color: var(--text-muted); }
.info-list dd { margin: 0; color: var(--text); word-break: break-all; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 32px;
}
.stat {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}
.stat b { display: block; font-size: 28px; color: var(--brand); letter-spacing: -.02em; }
.stat b .unit { font-size: 15px; font-weight: 600; margin-left: 1px; }
.stat > span { display: block; margin-top: 4px; color: var(--text-muted); font-size: 13px; }

/* ---------------------------------------------------------------- 页面标题 */

.page-head {
  padding: 46px 0 34px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
}
.page-head h1 { font-size: 30px; }
.page-head p { margin-top: 10px; color: var(--text-mid); max-width: 46em; }

/* -------------------------------------------------------------- 付款弹层 */

.modal[hidden] { display: none; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(16, 21, 32, .55);
  animation: fade .16s ease-out;
}
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }

.modal__panel {
  position: relative;
  width: 100%;
  max-width: 356px;
  padding: 30px 28px 24px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(16, 21, 32, .3);
  text-align: center;
  animation: pop .18s ease-out;
}
@keyframes pop { from { opacity: 0; transform: translateY(10px) scale(.98) } to { opacity: 1; transform: none } }

.modal__close {
  position: absolute;
  top: 12px; right: 12px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: 0; border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 20px; line-height: 1;
  cursor: pointer;
}
.modal__close:hover { background: var(--bg-soft); color: var(--text); }

.modal__title { font-size: 18px; }
.modal__price { margin-top: 6px; color: var(--warn); font-size: 14px; font-weight: 600; }
.modal__qr {
  width: 200px; height: 276px;
  margin: 18px auto 14px;
  display: block;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}
.modal__for {
  margin-top: 2px;
  color: var(--text-mid);
  font-size: 13.5px;
  line-height: 1.6;
}
.modal__for b { color: var(--text); font-weight: 600; }
.modal__tip {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-muted);
  font-size: 12.5px;
  line-height: 1.7;
}

/* -------------------------------------------------------------------- 页脚 */

.site-footer {
  margin-top: 20px;
  padding: 44px 0 30px;
  background: #131a28;
  color: #9aa5b8;
  font-size: 13.5px;
}
.site-footer__top {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.site-footer h4 {
  margin-bottom: 14px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
}
.site-footer a { color: #9aa5b8; }
.site-footer a:hover { color: #fff; }
.site-footer li + li { margin-top: 8px; }
.site-footer__name { color: #e8ecf4; font-size: 15px; font-weight: 600; }
.site-footer__desc { margin-top: 10px; max-width: 26em; line-height: 1.8; }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 18px;
  padding-top: 22px;
  font-size: 13px;
}
.site-footer__legal { display: flex; flex-wrap: wrap; gap: 8px 18px; }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 34px; padding-top: 46px; padding-bottom: 46px; }
  .hero h1 { font-size: 30px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer__top { grid-template-columns: 1fr 1fr; gap: 26px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .site-header .wrap { height: 58px; }
  .brand { font-size: 15px; }
  .brand__sub { display: none; }
  .nav a { padding: 8px 10px; font-size: 14px; }
  section { padding: 42px 0; }
  .grid-3, .stat-row { grid-template-columns: 1fr; }
  .article { padding: 20px 18px 16px; }
  .article__title { font-size: 17px; }
  .site-footer__top { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
}