/* ============================================================
   智慧好课堂 · 官网 UI 设计系统 v1.0
   设计者: UI Designer | 品牌: 教育墨绿 #237A57 + 暖金 #C9A227 + 米白 #FBF8F1
   配套规范: design-system.md
   ============================================================ */

/* ===== 1. 设计 Tokens ===== */
:root {
  /* 色彩系统 */
  --primary-900: #123F2D;
  --primary-700: #1B6046;
  --primary-500: #237A57;
  --primary-300: #5FA88A;
  --primary-100: #E8F5EF;
  --primary-50:  #F4FAF6;

  --gold-500: #C9A227;
  --gold-100: #FBF3DC;
  --gold-700: #8A6D1A;

  --ink:      #2B2B2B;
  --ink-soft: #5C5C5C;
  --ink-mute: #9A937F;
  --bg:       #FBF8F1;
  --card:     #FFFFFF;
  --line:     #E7E2D7;

  --success: #2E9E6B;
  --warning: #D97706;
  --error:   #DC2626;

  /* 字体 */
  --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "HarmonyOS Sans SC", sans-serif;

  /* 圆角 */
  --radius-sm: 10px;
  --radius:    14px;
  --radius-lg: 20px;

  /* 阴影 */
  --shadow:    0 6px 24px rgba(35, 122, 87, 0.08);
  --shadow-lg: 0 14px 40px rgba(35, 122, 87, 0.14);

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition:      250ms ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-500); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-700); }
img { max-width: 100%; display: block; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .container { padding: 0 16px; } }

/* ===== 2. 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px;
  font-family: var(--font-family); font-size: 15px; font-weight: 600;
  border: 2px solid transparent; cursor: pointer; text-decoration: none;
  transition: all var(--transition-fast); min-height: 46px; user-select: none;
}
.btn:focus-visible { outline: 2px solid var(--primary-500); outline-offset: 3px; }
.btn-primary { background: var(--primary-500); color: #fff; }
.btn-primary:hover { background: var(--primary-700); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary:active { transform: translateY(1px); }
.btn-outline { border-color: var(--primary-500); color: var(--primary-500); background: transparent; }
.btn-outline:hover { background: var(--primary-100); transform: translateY(-1px); }
.btn-white { background: #fff; color: var(--primary-500); }
.btn-white:hover { background: var(--gold-100); transform: translateY(-1px); }
.btn-sm { padding: 8px 18px; font-size: 13.5px; min-height: 38px; }

/* ===== 3. 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #F1E4C8; /* 米色纸底 */
  background-image: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(0,0,0,0.04));
  border-bottom: 1px solid #D8C49B;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; line-height: 0; margin-left: -190px; /* 页眉 logo 左移 5cm（1cm≈38px，5cm=190px） */ }
.brand-img { height: 60px; width: auto; display: block; transition: opacity var(--transition-fast); }
.brand:hover .brand-img { opacity: .88; }
.footer-brand-img {
  height: 52px; width: auto; display: inline-block;
  background: #fff; padding: 10px 16px; border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.18);
  margin-bottom: 14px;
}
.nav-menu { display: flex; gap: 28px; align-items: center; }
.nav-menu a {
  color: var(--primary-900); font-size: 15px; font-weight: 600;
  position: relative; padding: 6px 0; text-decoration: none;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--primary-500); }
.nav-menu a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px; border-radius: 2px; background: var(--primary-500);
}
.nav-cta { background: var(--primary-500); color: #fff !important; padding: 9px 22px !important; border-radius: 999px; font-weight: 600; }
.nav-cta:hover { background: var(--primary-700); color: #fff !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; }
.nav-toggle span { width: 24px; height: 2.5px; background: var(--primary-700); border-radius: 2px; transition: all var(--transition-fast); }

/* 移动端导航 */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: #F1E4C8;
    border-bottom: 1px solid #D8C49B;
    display: none; padding: 8px 24px 16px;
    box-shadow: 0 20px 40px rgba(18,63,45,0.10);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { width: 100%; padding: 13px 0; border-bottom: 1px solid #F3F0E8; }
  .nav-menu a.active::after { display: none; }
  .nav-menu a.active { color: var(--primary-500); font-weight: 700; }
  .nav-cta { text-align: center; margin-top: 8px; }
}

/* ===== 4. 区块与标题 ===== */
.section { padding: 72px 0; }
.section-alt { background: #fff; }
@media (max-width: 600px) { .section { padding: 48px 0; } }

.section-head { text-align: center; margin-bottom: 48px; }
.section-head .tag {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--primary-700);
  background: var(--primary-100); padding: 5px 16px; border-radius: 999px; margin-bottom: 14px;
  letter-spacing: 1.5px;
}
.section-head h2 { font-size: 32px; font-weight: 900; letter-spacing: 1px; color: var(--ink); }
.section-head p { color: var(--ink-soft); margin-top: 10px; font-size: 15px; }
.section-head.left { text-align: left; }

/* ===== 5. 网格 ===== */
.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .g-3, .g-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .g-2, .g-3, .g-4 { grid-template-columns: 1fr; } }

/* ===== 6. 卡片 ===== */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: block; text-decoration: none; color: inherit;
}
a.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); color: inherit; }
.card .ic { font-size: 34px; margin-bottom: 14px; display: block; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--ink); }
.card .meta { font-size: 12.5px; color: var(--ink-mute); margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--ink-soft); }
.card .more { display: inline-block; margin-top: 12px; font-size: 13.5px; font-weight: 600; color: var(--primary-500); }
a.card:hover .more { text-decoration: underline; }

/* 图文卡 */
.img-card { overflow: hidden; padding: 0; }
.img-card .thumb {
  height: 170px;
  background: linear-gradient(135deg, var(--success), var(--primary-500));
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.92); font-size: 44px;
  transition: transform var(--transition);
}
.img-card:hover .thumb { transform: scale(1.03); }
.img-card .body { padding: 20px 24px 24px; }

/* 视频卡 */
.video-card .video-box {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  aspect-ratio: 16/9; margin-bottom: 14px;
  background: linear-gradient(135deg, var(--primary-900), var(--primary-500));
  display: flex; align-items: center; justify-content: center;
}
.video-card .play {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,255,255,.94);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--primary-500); padding-left: 3px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25); cursor: pointer;
  transition: transform var(--transition-fast);
}
.video-card .play:hover { transform: scale(1.12); }

/* ===== 7. 徽章/标签 ===== */
.badge {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary-700);
  background: var(--primary-100); border-radius: 999px; padding: 3px 12px; margin-bottom: 10px;
}
.badge-gold { color: var(--gold-700); background: var(--gold-100); }

/* ===== 8. 提示条 / 说明条 ===== */
.notice-bar {
  background: var(--gold-100); color: var(--gold-700); text-align: center;
  font-size: 14.5px; padding: 14px 20px; line-height: 1.6;
  font-weight: 500;
}
.note {
  background: var(--gold-100); border: 1px dashed #D8BE6E; color: var(--gold-700);
  border-radius: var(--radius-sm); padding: 12px 18px; font-size: 13.5px; margin: 30px 0;
}

/* ===== 9. 文章列表 ===== */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 20px 4px; border-bottom: 1px solid var(--line);
  text-decoration: none; transition: background var(--transition-fast);
}
.news-item:hover { background: var(--primary-50); }
.news-item .date {
  min-width: 76px; text-align: center; background: var(--primary-100);
  border-radius: var(--radius-sm); padding: 10px 6px; flex-shrink: 0;
}
.news-item .date .d { font-size: 22px; font-weight: 900; color: var(--primary-700); line-height: 1.2; }
.news-item .date .m { font-size: 12px; color: var(--ink-soft); }
.news-item .tit { font-size: 16.5px; font-weight: 700; color: var(--ink); }
.news-item:hover .tit { color: var(--primary-500); }
.news-item .desc { font-size: 13.5px; color: var(--ink-soft); margin-top: 4px; }

/* ===== 10. Hero（沉浸式 v3 · 满屏首屏）===== */
.hero {
  position: relative;
  min-height: 100vh; /* 满屏首屏 */
  padding: 104px 24px 72px; overflow: hidden; color: #fff;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(1200px 700px at 15% 25%, rgba(95,168,138,0.20), transparent 55%),
    radial-gradient(1000px 600px at 85% 75%, rgba(46,158,107,0.16), transparent 60%),
    radial-gradient(800px 400px at 50% 100%, rgba(0,0,0,0.35), transparent 70%),
    linear-gradient(180deg, #1a2e44 0%, #0f1f30 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.55;
  background:
    linear-gradient(rgba(255,255,255,0.05), rgba(255,255,255,0.05)) 8% 4% / 38% 28% no-repeat,
    linear-gradient(rgba(255,255,255,0.04), rgba(255,255,255,0.04)) 60% 6% / 32% 24% no-repeat,
    linear-gradient(rgba(255,255,255,0.05), rgba(255,255,255,0.05)) 5% 76% / 90% 1px no-repeat,
    linear-gradient(rgba(255,255,255,0.04), rgba(255,255,255,0.04)) 5% 84% / 90% 1px no-repeat,
    linear-gradient(rgba(255,255,255,0.03), rgba(255,255,255,0.03)) 5% 92% / 90% 1px no-repeat,
    radial-gradient(circle at 18% 40%, rgba(180,210,235,0.08), transparent 18%),
    radial-gradient(circle at 78% 55%, rgba(180,210,235,0.06), transparent 22%);
}
/* ===== 教育场景分层背景(远景校园 / 中景教室学生 / 近景AI大数据) ===== */
.hero-scene { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.scene-layer { position: absolute; inset: -2%; width: 104%; height: 104%; }
.scene-layer svg { width: 100%; height: 100%; display: block; }
.scene-far   { filter: blur(7px);   opacity: 0.42; }
.scene-mid   { filter: blur(2.5px); opacity: 0.5; }
.scene-near  { filter: blur(0.6px); opacity: 0.55; }
.hero-center {
  text-align: center; width: 100%; margin: 0 auto;
  padding: 0 24px; /* 适度留边 */
  position: relative; z-index: 2;
}
.hero-brand-large {
  width: 94vw; /* 品牌字加大一号（容器已放开宽度限制，不再被裁剪） */
  height: auto; display: block; margin: 0 auto 38px;
  filter: drop-shadow(0 8px 30px rgba(0,0,0,0.5));
}
.hero-tagline {
  color: rgba(255,255,255,0.88);
  font-size: 16px; letter-spacing: 2px; font-weight: 400;
  margin: 0 0 34px; line-height: 1.7;
  max-width: 920px; margin-left: auto; margin-right: auto;
}
/* ===== Hero 五大主题胶囊（解读政策/了解动态/学习理论/打造品牌/走进学校）===== */
.hero-pills { display: flex; flex-wrap: nowrap; justify-content: center; gap: 8px; margin: 0 auto 48px; max-width: 88vw; padding: 0 8px; }
.hero-pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 8px 15px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; letter-spacing: 0.3px;
  border: 1.5px solid; text-decoration: none;
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.hero-pill:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0,0,0,0.25); }
/* 五色搭配（同亮度色谱，深蓝底上柔和协调）*/
.hero-pill.p1 { color: #7FD6AE; border-color: rgba(127,214,174,0.55); }
.hero-pill.p1:hover { background: rgba(127,214,174,0.16); }
.hero-pill.p2 { color: #E8C766; border-color: rgba(232,199,102,0.55); }
.hero-pill.p2:hover { background: rgba(232,199,102,0.16); }
.hero-pill.p3 { color: #7FB4E8; border-color: rgba(127,180,232,0.55); }
.hero-pill.p3:hover { background: rgba(127,180,232,0.16); }
.hero-pill.p4 { color: #F0B877; border-color: rgba(240,184,119,0.55); }
.hero-pill.p4:hover { background: rgba(240,184,119,0.16); }
.hero-pill.p5 { color: #B79BF0; border-color: rgba(183,155,240,0.55); }
.hero-pill.p5:hover { background: rgba(183,155,240,0.16); }
.hero-pill.p6 { color: #F2A6C0; border-color: rgba(242,166,192,0.55); }
.hero-pill.p6:hover { background: rgba(242,166,192,0.16); }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.hero-btns .btn-outline-light {
  border-color: rgba(255,255,255,.6); color: #fff; background: transparent;
}
.hero-btns .btn-outline-light:hover { background: rgba(255,255,255,.12); color: #fff; }
.hero-stats { display: flex; gap: 72px; margin-top: 72px; flex-wrap: wrap; justify-content: center; }
.hero-stats .num { color: #fff; font-size: 42px; }
.hero-stats .label { color: rgba(255,255,255,0.72); font-size: 15px; }

@media (max-width: 900px) {
  .hero { padding: 88px 20px 56px; min-height: 100vh; }
  .hero-brand-large { width: 96vw; }
  .hero-pills { flex-wrap: wrap; gap: 8px; max-width: 90vw; }
  .hero-stats { gap: 36px; margin-top: 48px; }
}

/* ===== 11. 内页 Hero ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary-700), var(--success));
  color: #fff; padding: 56px 0 46px; text-align: center;
}
.page-hero h1 { font-size: 34px; font-weight: 900; letter-spacing: 1px; }
.page-hero p { opacity: .9; margin-top: 10px; font-size: 15.5px; }
.crumb { font-size: 13px; opacity: .75; margin-top: 14px; }
.crumb a { color: #fff; }
.crumb a:hover { text-decoration: underline; }

/* ===== 12. 横幅 ===== */
.banner {
  background: linear-gradient(120deg, var(--primary-700), var(--success));
  border-radius: var(--radius-lg); padding: 44px 48px; color: #fff;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; box-shadow: var(--shadow-lg);
}
.banner h3 { font-size: 24px; font-weight: 800; }
.banner p { opacity: .92; margin-top: 6px; }
@media (max-width: 600px) { .banner { padding: 32px 24px; text-align: center; justify-content: center; } }

/* ===== 13. 页脚 ===== */
.site-footer { background: var(--primary-900); color: rgba(255,255,255,.72); padding: 48px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid a { display: block; color: rgba(255,255,255,.68); font-size: 13.5px; margin-bottom: 8px; text-decoration: none; }
.footer-grid a:hover { color: #fff; }
.footer-brand { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.14); margin-top: 36px; padding-top: 20px; text-align: center; font-size: 12.5px; color: rgba(255,255,255,.5); }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===== 14. 关于页 ===== */
.about-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-hero .pic {
  aspect-ratio: 4/3; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-500), var(--success));
  display: flex; align-items: center; justify-content: center;
  font-size: 64px; color: rgba(255,255,255,.9); box-shadow: var(--shadow-lg);
}
.about-org { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.about-org .chip {
  background: var(--primary-100); color: var(--primary-700);
  padding: 7px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
}
@media (max-width: 900px) { .about-hero { grid-template-columns: 1fr; } }

/* ===== 15. 无障碍 / 动效偏好 ===== */
:focus-visible { outline: 2px solid var(--primary-500); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ===== 16. 培训报道（图文 + 视频片段）===== */
.report-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
@media (max-width: 760px) { .report-list { grid-template-columns: 1fr; } }
.report-card {
  display: flex; gap: 16px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); text-decoration: none; color: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
}
.report-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); color: inherit; }
.report-card .cover {
  width: 132px; height: 92px; flex-shrink: 0; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary-700), var(--success));
  display: flex; align-items: center; justify-content: center; font-size: 34px; color: rgba(255,255,255,.92);
  overflow: hidden;
}
.report-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.report-card .info { flex: 1; min-width: 0; }
.report-card h3 { font-size: 16.5px; font-weight: 700; color: var(--ink); margin-bottom: 6px; line-height: 1.4; }
.report-card .meta { font-size: 12.5px; color: var(--ink-mute); }
.report-card .excerpt { font-size: 13px; color: var(--ink-soft); margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* 报道详情页 */
.report-article { max-width: 820px; margin: 0 auto; padding: 48px 24px 72px; }
.report-article .crumb { font-size: 13px; color: var(--ink-mute); margin-bottom: 18px; }
.report-article .crumb a { color: var(--primary-500); }
.report-article h1 { font-size: 30px; font-weight: 900; color: var(--ink); line-height: 1.35; margin-bottom: 16px; }
.report-meta {
  display: flex; flex-wrap: wrap; gap: 10px 22px;
  background: var(--primary-50); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 22px; margin-bottom: 32px;
  font-size: 14px; color: var(--ink-soft);
}
.report-meta b { color: var(--primary-700); font-weight: 700; margin-right: 4px; }
.report-article h2 { font-size: 22px; font-weight: 800; color: var(--ink); margin: 38px 0 16px; padding-left: 14px; border-left: 5px solid var(--primary-500); }
.report-article p { font-size: 15.5px; color: var(--ink-soft); margin-bottom: 14px; }
.report-points { list-style: none; counter-reset: pt; padding: 0; }
.report-points li {
  counter-increment: pt; position: relative; padding: 14px 18px 14px 52px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm);
  margin-bottom: 12px; font-size: 15px; color: var(--ink-soft);
}
.report-points li::before {
  content: counter(pt); position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 26px; height: 26px; border-radius: 50%; background: var(--primary-500); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700;
}
/* 响应式视频嵌入框（16:9，B站/腾讯视频通用）*/
.video-embed { position: relative; width: 100%; aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; margin: 18px 0; box-shadow: var(--shadow); background: #000; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.report-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 18px 0; }
@media (max-width: 600px) { .report-gallery { grid-template-columns: 1fr; } }
.report-gallery img { width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line); }
.report-quote {
  background: var(--gold-100); border-left: 4px solid var(--gold-500);
  border-radius: var(--radius-sm); padding: 16px 20px; margin: 18px 0;
  font-size: 15px; color: var(--gold-700);
}

/* ===== 17. ICP 备案号（footer 工信部要求悬挂）===== */
.beian {
  display: inline-flex; align-items: center; gap: 5px;
  margin-left: 10px; padding-left: 10px;
  border-left: 1px solid var(--line);
  font-size: 13px; color: var(--ink-2);
}
.beian::before {
  content: ""; display: inline-block; width: 14px; height: 14px;
  background: #1F4D3A;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4z'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4z'/></svg>") center/contain no-repeat;
}
.beian a { color: var(--ink-2); text-decoration: none; transition: color var(--transition-fast); }
.beian a:hover { color: var(--primary-700); text-decoration: underline; }