/* ============================================================
   个人证书成就馆 · 样式表
   浅色主题 / 现代卡片风 / 响应式（桌面 → 移动）
   ============================================================ */
:root {
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --accent-2: #7c3aed;
  --ink: #1e2235;
  --ink-2: #4b5165;
  --ink-3: #8a90a5;
  --bg: #f5f6fa;
  --card: #ffffff;
  --line: #e7e9f2;
  --shadow: 0 1px 3px rgba(30, 34, 53, .06), 0 8px 24px rgba(30, 34, 53, .07);
  --shadow-lift: 0 4px 10px rgba(79, 70, 229, .12), 0 16px 40px rgba(30, 34, 53, .14);
  --radius: 16px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
.hidden { display: none !important; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #4338ca 0%, #4f46e5 45%, #7c3aed 100%);
  color: #fff;
  padding: 72px 24px 96px;
  text-align: center;
}
.hero-deco {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background:
    radial-gradient(560px 260px at 12% 8%, rgba(255,255,255,.16), transparent 60%),
    radial-gradient(480px 300px at 88% 90%, rgba(255,255,255,.12), transparent 60%),
    radial-gradient(300px 200px at 75% 12%, rgba(255,255,255,.10), transparent 65%);
}
.hero-inner { position: relative; max-width: 980px; margin: 0 auto; }
.hero-badge {
  display: inline-block;
  font-size: 12px; font-weight: 600; letter-spacing: .22em;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.28);
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 20px; backdrop-filter: blur(4px);
}
.hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800; letter-spacing: .04em;
}
.hero-sub { margin-top: 10px; font-size: 16px; color: rgba(255,255,255,.85); }
.stats {
  display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
  margin-top: 34px;
}
.stat {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius);
  padding: 14px 26px; min-width: 128px;
  backdrop-filter: blur(6px);
}
.stat b { display: block; font-size: 26px; font-weight: 800; line-height: 1.2; }
.stat span { font-size: 12.5px; color: rgba(255,255,255,.8); letter-spacing: .08em; }

/* ---------------- 容器 / 工具栏 ---------------- */
.container { max-width: 1240px; margin: -48px auto 0; padding: 0 20px 60px; position: relative; }
.toolbar {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 18px 20px 14px;
  margin-bottom: 26px;
}
.search-wrap { position: relative; margin-bottom: 14px; }
.search-ico {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px; color: var(--ink-3);
}
#search {
  width: 100%;
  font: 15px var(--font);
  padding: 12px 16px 12px 42px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: #fafbfe;
  color: var(--ink);
  outline: none;
  transition: border-color .18s, box-shadow .18s;
}
#search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); background: #fff; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip-group { display: flex; align-items: flex-start; gap: 10px; }
.chip-group + .chip-group { margin-top: 10px; }
.chip-label {
  flex-shrink: 0; font-size: 12px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); border-radius: 8px; padding: 6px 10px;
  letter-spacing: .12em; margin-top: 2px;
}
.chip-group .chips { flex: 1; min-width: 0; }
.chips.sub { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); }
.chips.sub .chip { font-size: 12.5px; padding: 5px 12px; }
.chips.sub .chip small { font-size: 10.5px; }
.chip {
  border: 1.5px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 999px;
  padding: 7px 15px;
  font-size: 13.5px; font-weight: 500;
  transition: all .16s;
}
.chip small { color: var(--ink-3); font-size: 11.5px; margin-left: 4px; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, .3);
}
.chip.active small { color: rgba(255,255,255,.75); }
.toolbar-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-top: 14px; }
.sel-wrap { display: flex; flex-direction: column; gap: 4px; }
.sel-wrap label { font-size: 11.5px; color: var(--ink-3); letter-spacing: .06em; }
.sel-wrap select {
  font: 13.5px var(--font); color: var(--ink);
  border: 1.5px solid var(--line); border-radius: 10px;
  padding: 8px 10px; background: #fff; outline: none; min-width: 160px;
}
.sel-wrap select:focus { border-color: var(--accent); }
.view-toggle {
  display: flex; gap: 4px;
  border: 1.5px solid var(--line); border-radius: 10px; padding: 3px;
  margin-left: auto;
}
.vt-btn {
  border: none; background: transparent; color: var(--ink-3);
  width: 34px; height: 30px; border-radius: 8px;
  display: grid; place-items: center; transition: all .15s;
}
.vt-btn svg { width: 17px; height: 17px; }
.vt-btn.active { background: var(--accent-soft); color: var(--accent); }
.result-line { margin-top: 12px; font-size: 13px; color: var(--ink-3); }
.result-line b { color: var(--accent); }

/* ---------------- 卡片网格 ---------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(258px, 1fr));
  gap: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
  display: flex; flex-direction: column;
  animation: rise .35s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); border-color: #d9dcf0; }
.thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #eef0f7; }
.thumb img {
  width: 100%; height: 100%; object-fit: cover; object-position: top center;
  transition: transform .3s ease;
}
.card:hover .thumb img { transform: scale(1.045); }
.thumb .ph {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #e4e7f5, #f2f0fb);
  font-size: 44px; opacity: .8;
}
.tag {
  position: absolute; top: 10px; left: 10px;
  font-size: 11px; font-weight: 600; letter-spacing: .05em;
  padding: 3px 10px; border-radius: 999px;
  backdrop-filter: blur(4px);
}
.tag.badge { background: rgba(245, 158, 11, .92); color: #fff; }
.tag.cert { background: rgba(79, 70, 229, .9); color: #fff; }
.tag.cat { left: auto; right: 10px; background: rgba(255,255,255,.9); color: var(--ink-2); }
.card-body { padding: 14px 16px 6px; flex: 1; }
.card-body h3 {
  font-size: 14.5px; font-weight: 600; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; min-height: 42px;
}
.card-desc {
  margin-top: 6px;
  font-size: 12px; color: var(--ink-2); line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  margin-top: 8px; font-size: 12px; color: var(--ink-3);
}
.card-meta .plat {
  color: var(--accent); background: var(--accent-soft);
  padding: 1.5px 8px; border-radius: 6px; font-weight: 500;
  max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px 14px; font-size: 12px; color: var(--ink-3);
}
.card-foot .date { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.card-foot .date svg { width: 13px; height: 13px; }
.stars {
  font-style: normal;
  color: #f59e0b;
  letter-spacing: 1px;
  text-shadow: 0 1px 2px rgba(245, 158, 11, .18);
}
.stars.big { font-size: 16px; }
.card-foot .more { color: var(--accent); font-weight: 600; }
.card-foot .more::after { content: " ›"; }

/* ---------------- 时间线视图 ---------------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px;
  width: 2.5px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), #c7d2fe);
}
.tl-group { margin-bottom: 34px; }
.tl-head { position: relative; margin-bottom: 14px; }
.tl-head::before {
  content: ""; position: absolute; left: -26px; top: 7px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
}
.tl-head h2 { font-size: 19px; font-weight: 700; }
.tl-head span { font-size: 13px; color: var(--ink-3); margin-left: 10px; }
.tl-group .grid { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }

.sentinel { height: 10px; }
.loading-more { text-align: center; color: var(--ink-3); font-size: 13px; padding: 18px 0 4px; }
.empty { text-align: center; padding: 70px 0; color: var(--ink-3); }
.empty-ico { font-size: 52px; margin-bottom: 12px; }

/* ---------------- 弹窗 ---------------- */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-mask { position: absolute; inset: 0; background: rgba(20, 22, 40, .55); backdrop-filter: blur(5px); animation: fade .2s ease; }
@keyframes fade { from { opacity: 0; } }
.modal-panel {
  position: relative;
  background: #fff; border-radius: 22px;
  width: min(960px, 100%); max-height: 90vh;
  display: grid; grid-template-columns: 1.15fr 1fr;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.35);
  animation: pop .25s cubic-bezier(.2, .9, .3, 1.2);
}
@keyframes pop { from { opacity: 0; transform: scale(.94) translateY(14px); } }
.modal-media { background: #eceef6; display: grid; place-items: center; overflow: auto; position: relative; }
.modal-media img { width: 100%; height: auto; max-height: 88vh; object-fit: contain; }
.modal-media .ph { font-size: 80px; opacity: .5; padding: 60px; }
.modal-media iframe { width: 100%; height: min(84vh, 900px); border: 0; background: #fff; }
.media-loading {
  position: absolute; inset: 0; z-index: 1;
  display: grid; place-items: center;
  color: var(--ink-3); font-size: 14px;
  background: #eceef6; pointer-events: none;
}
.modal-info { padding: 28px 26px; overflow-y: auto; }
.modal-close {
  position: absolute; top: 14px; right: 14px; z-index: 5;
  width: 36px; height: 36px; border-radius: 50%;
  border: none; background: rgba(255,255,255,.85); color: var(--ink-2);
  font-size: 15px; box-shadow: var(--shadow);
  transition: all .15s;
}
.modal-close:hover { background: var(--ink); color: #fff; }
.modal-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.mtag { font-size: 11.5px; font-weight: 600; padding: 3px 11px; border-radius: 999px; }
.mtag.cat { background: var(--accent-soft); color: var(--accent); }
.mtag.badge { background: #fef3c7; color: #b45309; }
.mtag.cert { background: #e0e7ff; color: var(--accent); }
.modal-info h2 { font-size: 20px; line-height: 1.45; margin-bottom: 10px; }
.modal-desc { font-size: 13.5px; color: var(--ink-2); margin-bottom: 18px; }
.modal-facts { border-top: 1px dashed var(--line); }
.modal-facts > div {
  display: flex; gap: 14px; padding: 9px 0;
  border-bottom: 1px dashed var(--line); font-size: 13px;
}
.modal-facts dt { width: 74px; flex-shrink: 0; color: var(--ink-3); }
.modal-facts dd { color: var(--ink); word-break: break-all; }
.modal-facts dd a { color: var(--accent); text-decoration: none; }
.modal-facts dd a:hover { text-decoration: underline; }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 18px; border-radius: 11px;
  font-size: 13.5px; font-weight: 600; text-decoration: none;
  border: 1.5px solid var(--line); background: #fff; color: var(--ink-2);
  transition: all .16s;
}
.btn svg { width: 15px; height: 15px; }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 16px rgba(79, 70, 229, .32);
}
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(79, 70, 229, .4); }
.btn:hover:not(.primary) { border-color: var(--accent); color: var(--accent); }

/* ---------------- 页脚 ---------------- */
.footer { text-align: center; padding: 30px 20px 46px; color: var(--ink-3); font-size: 12.5px; }
.footer code { background: #eceef6; padding: 1px 7px; border-radius: 6px; font-size: 12px; }
.footer-tip { margin-top: 6px; opacity: .8; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
  .modal-panel { grid-template-columns: 1fr; max-height: 92vh; overflow-y: auto; display: block; }
  .modal-media { max-height: 46vh; }
  .modal-media img { max-height: 46vh; }
  .modal-media iframe { height: 46vh; }
  .view-toggle { margin-left: 0; }
}
@media (max-width: 640px) {
  .hero { padding: 52px 16px 84px; }
  .stat { min-width: 96px; padding: 10px 16px; }
  .stat b { font-size: 21px; }
  .container { margin-top: -40px; padding: 0 12px 40px; }
  .toolbar { padding: 14px 14px 12px; border-radius: 16px; }
  .chips { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; -webkit-overflow-scrolling: touch; }
  .chip { flex-shrink: 0; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: 12px; }
  .card-body h3 { font-size: 13px; min-height: 38px; }
  .card-body { padding: 11px 12px 4px; }
  .card-foot { padding: 8px 12px 11px; font-size: 11px; }
  .tag { font-size: 10px; padding: 2px 8px; }
  .tl-group .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .modal-info { padding: 20px 16px; }
}