/* 考试卷网 — mobile-first, no external assets (China-friendly) */
:root {
  --primary: #e8590c;
  --primary-dark: #d9480f;
  --primary-soft: #fff4ec;
  --ink: #1f2933;
  --ink-2: #52606d;
  --ink-3: #9aa5b1;
  --line: #e4e7eb;
  --bg: #f7f8fa;
  --card: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(31, 41, 51, .06), 0 8px 24px -16px rgba(31, 41, 51, .18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink); background: var(--bg);
  font-size: 15px; line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1024px; margin: 0 auto; padding: 0 16px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; white-space: nowrap; }
.brand-logo { width: 28px; height: 28px; border-radius: 8px; display: block; }
.main-nav { display: none; gap: 4px; margin-left: 8px; flex: 1; }
.main-nav a {
  padding: 6px 12px; border-radius: 8px; color: var(--ink-2); font-size: 14px;
}
.main-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.main-nav a.active { background: var(--primary-soft); color: var(--primary-dark); font-weight: 600; }
.search-form { display: flex; flex: 1; margin-left: auto; max-width: 300px; }
.search-form input {
  flex: 1; min-width: 0; border: 1px solid var(--line); border-right: 0;
  border-radius: 8px 0 0 8px; padding: 7px 12px; font-size: 14px; outline: none;
  background: var(--bg);
}
.search-form input:focus { border-color: var(--primary); background: #fff; }
.search-form button {
  border: 1px solid var(--primary); background: var(--primary); color: #fff;
  border-radius: 0 8px 8px 0; padding: 0 14px; font-size: 14px; cursor: pointer;
}
@media (min-width: 720px) {
  .main-nav { display: flex; }
  .search-form { flex: 0 1 300px; }
}

/* ---------- hero ---------- */
.hero {
  margin: 20px 0 16px; padding: 28px 20px;
  background: linear-gradient(135deg, #fff4ec 0%, #fff 55%);
  border: 1px solid #ffe3d0; border-radius: 16px;
}
.hero h1 { font-size: 24px; margin-bottom: 8px; }
.hero p { color: var(--ink-2); }
.hero b { color: var(--primary-dark); }

/* ---------- grade cards / subject chips ---------- */
.grade-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 640px) { .grade-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grade-grid { grid-template-columns: repeat(3, 1fr); } }
.grade-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow); transition: transform .12s, border-color .12s;
}
.grade-card:hover { transform: translateY(-2px); border-color: #ffc9a3; }
.grade-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
.grade-name { font-size: 20px; font-weight: 800; }
.grade-count { color: var(--ink-3); font-size: 13px; }
.term-links { display: flex; flex-wrap: wrap; gap: 8px; }
.term-links a {
  padding: 6px 13px; border-radius: 999px; background: var(--primary-soft);
  color: var(--primary-dark); font-size: 13px; font-weight: 600; transition: background .12s;
}
.term-links a:hover { background: #ffe3d0; }
.term-links a i { font-style: normal; font-weight: 400; color: #dd8a5f; margin-left: 5px; font-size: 12px; }

.chip-grid.subject { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
.chip {
  display: flex; flex-direction: column; gap: 2px; align-items: center; text-align: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 6px; box-shadow: var(--shadow); transition: transform .12s, border-color .12s;
}
.chip:hover { transform: translateY(-2px); border-color: #ffc9a3; }
.chip-name { font-weight: 700; }
.chip-count { font-size: 12px; color: var(--ink-3); }

/* ---------- sections & lists ---------- */
.section { margin: 24px 0; }
.section-title { font-size: 18px; margin-bottom: 12px; }
.page-h1 { font-size: 22px; margin: 18px 0 6px; }
.page-sub { color: var(--ink-2); margin-bottom: 16px; }

.paper-list { list-style: none; }
.paper-list li + li { border-top: 1px solid var(--line); }
.paper-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--card); padding: 13px 14px; transition: background .12s;
}
.paper-item:hover { background: var(--primary-soft); }
.tag {
  flex: none; font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: #eef1f4; color: var(--ink-2); white-space: nowrap;
}
.tag-yuwen { background: #fff0e8; color: #d9480f; }
.tag-shuxue { background: #e7f0ff; color: #1c64d9; }
.tag-yingyu { background: #e8f7ef; color: #0c8a52; }
.tag-kexue { background: #f3ecfe; color: #7048c8; }
.tag-wuli { background: #e3f2fd; color: #1565c0; }
.tag-huaxue { background: #e6f4ea; color: #2e7d32; }
.tag-lishi { background: #fdf3d7; color: #a3620a; }
.tag-zhengzhi { background: #fdecea; color: #c62828; }
.tag-dili { background: #e0f2f1; color: #00695c; }
.tag-shengwu { background: #f1f8e9; color: #558b2f; }
.paper-title {
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.paper-meta { flex: none; font-size: 12px; color: var(--ink-3); text-transform: uppercase; }

/* ---------- crumbs / pager ---------- */
.crumbs { display: flex; align-items: center; gap: 8px; margin-top: 16px; color: var(--ink-3); font-size: 13px; }
.crumbs a:hover { color: var(--primary-dark); }
.crumbs i { font-style: normal; }
.crumbs span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 60%; }
.pager { display: flex; align-items: center; justify-content: center; gap: 16px; margin: 20px 0; }
.pager a {
  padding: 8px 16px; background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; font-size: 14px;
}
.pager a:hover { border-color: var(--primary); color: var(--primary-dark); }
.pager-cur { color: var(--ink-3); font-size: 14px; }

/* ---------- filter chips (edition filters) ---------- */
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 14px; }
.filter-label { color: var(--ink-2); font-size: 13px; }
.filter-chip {
  padding: 5px 12px; border-radius: 999px; background: var(--card);
  border: 1px solid var(--line); font-size: 13px; color: var(--ink-2);
  transition: border-color .12s, color .12s;
}
.filter-chip:hover { border-color: var(--primary); color: var(--primary-dark); }
.filter-chip i { font-style: normal; color: var(--ink-3); margin-left: 4px; font-size: 12px; }
.ed-link { color: var(--primary-dark); font-weight: 600; }

/* ---------- paper page ---------- */
.paper-info { display: flex; flex-wrap: wrap; gap: 12px; color: var(--ink-2); font-size: 13px; margin-bottom: 16px; }
.download-card {
  background: linear-gradient(135deg, #fff4ec, #fff);
  border: 1px solid #ffe3d0; border-radius: var(--radius);
  padding: 22px 20px; text-align: center; margin: 8px 0 4px;
}
.btn-download {
  display: inline-block; background: linear-gradient(135deg, #ff922b, var(--primary));
  color: #fff; font-size: 17px; font-weight: 600;
  padding: 12px 48px; border-radius: 999px; box-shadow: 0 6px 18px -6px rgba(232, 89, 12, .5);
}
.btn-download:hover { background: linear-gradient(135deg, #fd7e14, var(--primary-dark)); }
.btn-download.disabled { background: #ced4da; box-shadow: none; cursor: not-allowed; }
.dl-note { margin-top: 10px; color: var(--ink-2); font-size: 13px; }
.dl-note b { color: var(--primary-dark); }
.btn-print {
  display: inline-block; background: #fff; border: 2px solid var(--primary);
  color: var(--primary-dark); font-size: 16px; font-weight: 600;
  padding: 10px 40px; border-radius: 999px; cursor: pointer;
}
.btn-print:hover { background: var(--primary-soft); }

.paper-content {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 18px; line-height: 1.9; font-size: 16px;
}
.paper-content p { margin-bottom: 10px; }
.paper-content h2 { font-size: 17px; margin: 14px 0 8px; }
.content-more { color: var(--ink-3); text-align: center; }
.empty-note { color: var(--ink-2); background: var(--card); border: 1px dashed var(--line);
  border-radius: var(--radius); padding: 24px; text-align: center; }
.empty-note a { color: var(--primary-dark); font-weight: 600; }
.about-text p { margin-bottom: 12px; }

/* ---------- footer ---------- */
.site-footer {
  margin-top: 48px; padding: 28px 0 36px; border-top: 1px solid var(--line);
  color: var(--ink-3); font-size: 13px; text-align: center;
}
.site-footer p { margin-bottom: 6px; }
.site-footer a { color: var(--ink-2); }