/* =====================================================
   信用中国 · 首页专属样式（css/pages/index.css）
   -----------------------------------------------------
   组织约定：
   1. 整站公共样式（导航/页脚/按钮/栏目标题/资讯列表/服务卡片等）
      见 /static/website/css/styles.css，由 base.html 全局引入；
   2. 本文件只放首页独有板块的样式：
      顶部通栏(topbar) / Hero首屏 / 搜索框 / 印章视觉 / 数据条(stats) /
      资讯头条卡片(news__lead) / 资讯+公告双栏(dual-grid) / CTA横幅
   3. 样式来源：html效果图/styles.css（权威母本），响应式断点与母本一致。
===================================================== */

/* ---------- Top utility bar（顶部通栏，效果图中仅首页使用） ---------- */
.topbar {
  background: var(--ink);
  color: #d8c9b8;
  font-size: var(--fs-xs);
}
.topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 36px;
}
.topbar__left { display: flex; gap: 1.5rem; align-items: center; }
.topbar__left span { display: inline-flex; align-items: center; gap: 0.4rem; }
.topbar__right { display: flex; gap: 1.25rem; align-items: center; }
.topbar__right a { color: #d8c9b8; }
.topbar__right a:hover { color: var(--red-300); }
.topbar__sep { width: 1px; height: 12px; background: rgba(216, 201, 184, 0.2); }

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative;
  background: var(--paper);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(900px 480px at 88% 22%, rgba(200, 16, 46, 0.08), transparent 60%),
    radial-gradient(720px 380px at 12% 80%, rgba(173, 122, 47, 0.06), transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, transparent 0, transparent calc(100% - 1px), rgba(28, 18, 12, 0.04) 50%);
  background-size: 80px 100%;
  pointer-events: none;
  opacity: 0.4;
}
.hero__inner {
  position: relative;
  padding-block: clamp(3.5rem, 7vw, 5.5rem);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.9rem 0.4rem 0.5rem;
  border: 1px solid var(--red-200);
  background: var(--red-50);
  color: var(--red-600);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  border-radius: 999px;
}
.hero__eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--red-500);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.15);
}
.hero__title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-block: 1.25rem;
}
.hero__title .accent {
  color: var(--red-500);
  position: relative;
  display: inline-block;
}
.hero__title .accent::after {
  content: '';
  position: absolute;
  inset: auto 0 -8px 0;
  height: 4px;
  background: var(--red-500);
  opacity: 0.85;
}
.hero__lead {
  max-width: 36em;
  color: var(--ink-2);
  font-size: var(--fs-lg);
  line-height: 1.75;
  margin-bottom: 2.25rem;
}

/* ---------- Hero 搜索框（预留：评价结果查询入口） ---------- */
.search {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 0.5rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.search__field {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 0.75rem 1rem;
  font-size: var(--fs-base);
  color: var(--ink);
}
.search__field::placeholder { color: var(--muted-2); }
.search__divider {
  width: 1px;
  height: 24px;
  background: var(--line);
}
.search__select {
  appearance: none;
  border: none;
  background: transparent;
  padding: 0.75rem 1.25rem 0.75rem 0.5rem;
  font-size: var(--fs-sm);
  color: var(--ink-2);
  cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path d='M1 1l4 4 4-4' fill='none' stroke='%2375685A' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 1.5rem;
}
.search__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  background: var(--red-500);
  color: #fff;
  border-radius: var(--r);
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: all 200ms var(--ease-out-quart);
}
.search__btn:hover { background: var(--red-600); }
.search__btn svg { width: 16px; height: 16px; }
.search__hint {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: var(--fs-xs);
  color: var(--muted);
  align-items: center;
}
.search__hint .lbl { letter-spacing: 0.18em; }
.chip {
  padding: 0.3rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: var(--fs-xs);
  transition: all 200ms var(--ease-out-quart);
}
.chip:hover { border-color: var(--red-500); color: var(--red-500); }

/* ---------- Hero 印章视觉 ---------- */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 360px;
}
.seal {
  width: 320px;
  height: 320px;
  border: 2px solid var(--red-500);
  border-radius: 50%;
  display: grid;
  place-items: center;
  position: relative;
  background: var(--surface);
}
.seal::before {
  content: '';
  position: absolute;
  inset: 12px;
  border: 1px solid var(--red-300);
  border-radius: 50%;
}
.seal::after {
  content: '';
  position: absolute;
  inset: 24px;
  border: 1px dashed var(--red-300);
  border-radius: 50%;
  opacity: 0.6;
}
.seal__face {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
  z-index: 2;
}
.seal__zh {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: 3.5rem;
  color: var(--red-500);
  letter-spacing: 0.04em;
  line-height: 1;
}
.seal__en {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: 0.5em;
  font-size: 0.7rem;
  color: var(--red-500);
  padding-left: 0.5em;
}
.seal__date {
  margin-top: 0.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.2em;
}
.seal__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.seal__line {
  position: absolute;
  font-family: 'Noto Serif SC', serif;
  font-weight: 500;
  color: var(--red-500);
  font-size: 14px;
  letter-spacing: 0.1em;
}

/* ---------- Stats 数据条 ---------- */
.stats {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
.stats::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 200px at 20% 50%, rgba(200, 16, 46, 0.18), transparent 70%),
    radial-gradient(800px 200px at 80% 50%, rgba(173, 122, 47, 0.12), transparent 70%);
  pointer-events: none;
}
.stats__grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding-block: 3.5rem;
}
.stat {
  position: relative;
  padding: 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.stat + .stat::before {
  content: '';
  position: absolute;
  left: 0;
  top: 25%;
  height: 50%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(247, 242, 233, 0.18), transparent);
}
.stat__num {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(2rem, 3.5vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}
.stat__num .unit {
  font-size: 1rem;
  color: var(--muted-2);
  font-weight: 500;
  margin-left: 0.25rem;
}
.stat__lbl {
  font-size: var(--fs-sm);
  color: var(--muted-2);
  letter-spacing: 0.1em;
}

/* ---------- 资讯头条卡片（首页左栏大卡） ---------- */
.news__lead {
  display: block;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
  transition: all 320ms var(--ease-out-quart);
}
.news__lead::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--red-500);
}
.news__lead:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--red-100);
}
.news__lead-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  background: var(--red-500);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
  border-radius: 2px;
}
.news__lead-title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.45;
  color: var(--ink);
  margin-bottom: 0.85rem;
  letter-spacing: 0.02em;
}
.news__lead:hover .news__lead-title { color: var(--red-500); }
.news__lead-excerpt {
  font-size: var(--fs-base);
  color: var(--ink-2);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news__lead-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: var(--fs-xs);
  color: var(--muted);
  letter-spacing: 0.08em;
}
.news__lead-meta .src {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--red-600);
  font-weight: 500;
}
.news__lead-meta .src::before {
  content: '●';
  font-size: 8px;
  color: var(--red-500);
}
.news__lead-meta .dot { width: 3px; height: 3px; background: var(--muted-2); border-radius: 50%; }

/* ---------- 资讯 + 公告 左右双栏（首页） ---------- */
.dual-grid {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: 2.5rem;
}
.dual-grid__col {
  display: flex;
  flex-direction: column;
}
/* 资讯列左右栏用竖向分隔线 */
.dual-grid__col + .dual-grid__col {
  position: relative;
  padding-left: 2.5rem;
}
.dual-grid__col + .dual-grid__col::before {
  content: '';
  position: absolute;
  left: 0; top: 4.5rem; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--line), transparent);
}

/* ---------- CTA 行动横幅 ---------- */
.cta {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
  padding-block: clamp(3.5rem, 6vw, 5.5rem);
}
.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(600px 280px at 90% 50%, rgba(200, 16, 46, 0.22), transparent 70%),
    radial-gradient(500px 280px at 5% 50%, rgba(173, 122, 47, 0.18), transparent 70%);
}
.cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: center;
}
.cta__title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: var(--fs-4xl);
  line-height: 1.2;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}
.cta__title .accent { color: var(--red-300); }
.cta__lead {
  font-size: var(--fs-lg);
  color: var(--muted-2);
  max-width: 38em;
  line-height: 1.7;
}
.cta__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-end;
}
.cta__actions .btn {
  width: 100%;
  max-width: 280px;
  justify-content: space-between;
}
.cta__actions .btn svg { width: 16px; height: 16px; }

/* ---------- 首页响应式（断点与效果图母本一致） ---------- */
@media (max-width: 900px) {
  .hero__inner,
  .cta__inner { grid-template-columns: 1fr; }
  .hero__visual { order: -1; min-height: 280px; }
  .seal { width: 240px; height: 240px; }
  .seal__zh { font-size: 2.5rem; }
  .stats__grid { grid-template-columns: 1fr 1fr; padding-block: 2rem; }
  .stat + .stat::before { display: none; }
  .cta__actions { align-items: stretch; }
  .dual-grid { grid-template-columns: 1fr; gap: 2rem; }
  .dual-grid__col + .dual-grid__col {
    padding-left: 0;
    padding-top: 2rem;
    border-top: 1px dashed var(--line);
  }
  .dual-grid__col + .dual-grid__col::before { display: none; }
}
@media (max-width: 560px) {
  .stats__grid { grid-template-columns: 1fr; }
  .hero__title { font-size: 2rem; }
}