/* ===== 深空记忆 · 恋与深空主题 ===== */
:root {
  --bg: #0d0a2a;
  --bg2: #1a1348;
  --card: rgba(30, 22, 74, .82);
  --card-border: rgba(167, 139, 250, .35);
  --text: #e8e4ff;
  --muted: #9d94c9;
  --accent: #b79bff;
  --gold: #ffd98a;
  --danger: #ff8fa3;
  --radius: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: linear-gradient(160deg, var(--bg) 0%, var(--bg2) 55%, #241a5e 100%);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }

/* ---- 星空 ---- */
#starfield { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.star { position: absolute; background: #fff; border-radius: 50%; opacity: .7; animation: twinkle 3s infinite alternate; }
.star.big { background: var(--gold); box-shadow: 0 0 6px var(--gold); }
@keyframes twinkle { from { opacity: .2; } to { opacity: .9; } }

/* ---- 布局 ---- */
main { position: relative; z-index: 1; max-width: 1080px; margin: 0 auto; padding: 24px 16px 80px; }
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px);
  background: rgba(13, 10, 42, .8); border-bottom: 1px solid var(--card-border); }
.header-inner { max-width: 1080px; margin: 0 auto; display: flex; align-items: center; gap: 24px; padding: 12px 16px; }
.logo { font-weight: 700; color: var(--gold); font-size: 18px; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav a { padding: 6px 14px; border-radius: 999px; color: var(--muted); font-weight: 600; letter-spacing: .08em; }
.nav a.active { background: rgba(183, 155, 255, .18); color: var(--text); }
.header-side { font-size: 12px; color: var(--muted); }
.linkish { background: none; border: none; color: var(--accent); cursor: pointer; font-size: inherit; }
.linkish:hover { text-decoration: underline; }

.card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 17px; margin-bottom: 12px; color: var(--gold); }
.muted { color: var(--muted); font-size: 13px; margin-bottom: 12px; }

.page { display: none; }
.page.active { display: block; animation: fadein .3s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }

/* ---- 首页 ---- */
.home-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
.welcome-card { text-align: center; padding: 40px 24px; }
.welcome-sub { color: var(--muted); letter-spacing: .2em; font-size: 12px; }
.welcome-title { font-size: 42px; margin: 12px 0; background: linear-gradient(90deg, var(--gold), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.welcome-text { color: var(--muted); margin-bottom: 20px; line-height: 1.9; }
.btn-primary { background: linear-gradient(90deg, #8b5cf6, #b79bff); color: #fff; border: none;
  padding: 10px 22px; border-radius: 999px; cursor: pointer; font-weight: 600; font-size: 14px; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { background: rgba(183,155,255,.12); color: var(--text); border: 1px solid var(--card-border);
  padding: 6px 14px; border-radius: 999px; cursor: pointer; font-size: 13px; }
.center { display: block; margin: 0 auto 24px; }

.xia-card { display: flex; gap: 16px; align-items: center; }
.xia-avatar { flex: none; filter: drop-shadow(0 0 12px rgba(183,155,255,.5)); }
.xia-quote { color: var(--text); margin: 6px 0 8px; line-height: 1.7; font-style: italic; }
.xia-card h3 { color: var(--gold); font-size: 15px; }

.row-form { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.row-form input, .row-form select, .diary-form textarea {
  background: rgba(13,10,42,.6); border: 1px solid var(--card-border); color: var(--text);
  border-radius: 10px; padding: 9px 12px; font-size: 14px; font-family: inherit; }
.row-form input:focus, .diary-form textarea:focus { outline: 1px solid var(--accent); }
.row-form input[type="text"]:first-child { flex: 0 0 180px; }
.row-form input[type="text"] { flex: 1; min-width: 120px; }
.row-form input[type="url"] { flex: 1.4; min-width: 160px; }

.guestbook-list, .memo-list, .guide-list { list-style: none; }
.guestbook-list li { padding: 10px 0; border-bottom: 1px dashed rgba(157,148,201,.25); font-size: 14px; }
.guestbook-list .who { color: var(--gold); margin-right: 8px; }
.guestbook-list .when { color: var(--muted); font-size: 12px; margin-left: 8px; }
.memo-list li { display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: 7px 0; font-size: 13px; border-bottom: 1px dashed rgba(157,148,201,.2); }
.del-btn { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 14px; }

.bgm-controls { display: flex; gap: 8px; margin-bottom: 8px; }
.bgm-title { font-size: 13px; color: var(--muted); }

/* ---- 日记 ---- */
.diary-form textarea { width: 100%; resize: vertical; }
.diary-form-foot { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.file-label { background: rgba(183,155,255,.12); border: 1px dashed var(--card-border); padding: 7px 14px;
  border-radius: 999px; cursor: pointer; font-size: 13px; }
#photoCount { color: var(--muted); font-size: 12px; }
.photo-preview { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.photo-preview img { width: 72px; height: 72px; object-fit: cover; border-radius: 10px; border: 1px solid var(--card-border); }
.post { margin-bottom: 20px; }
.post-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
.post-who { color: var(--gold); font-weight: 700; }
.post-when { color: var(--muted); font-size: 12px; }
.post-text { white-space: pre-wrap; line-height: 1.8; font-size: 14px; margin-bottom: 10px; }
.post-photos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 10px; }
.post-photos img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; cursor: zoom-in; }
.post-comments { border-top: 1px dashed rgba(157,148,201,.25); padding-top: 8px; margin-top: 8px; }
.post-comments .cm { font-size: 13px; padding: 4px 0; color: var(--muted); }
.post-comments .cm b { color: var(--accent); }
.cm-form { display: flex; gap: 8px; margin-top: 8px; }
.cm-form input { flex: 1; background: rgba(13,10,42,.6); border: 1px solid var(--card-border);
  color: var(--text); border-radius: 10px; padding: 9px 12px; font-size: 14px; font-family: inherit; }
.lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); display: flex;
  align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; }
.lightbox img { max-width: 92vw; max-height: 92vh; border-radius: 12px; }

/* ---- 收藏 ---- */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { padding: 5px 14px; border-radius: 999px; font-size: 13px; cursor: pointer;
  background: rgba(183,155,255,.1); border: 1px solid transparent; color: var(--muted); }
.chip.active { background: rgba(183,155,255,.25); color: var(--text); border-color: var(--card-border); }
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.link-card { display: block; background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 16px; transition: transform .15s; }
.link-card:hover { transform: translateY(-3px); }
.link-card .t { color: var(--gold); font-weight: 700; margin-bottom: 6px; display: block; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; }
.link-card .u { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.link-card .cat { display: inline-block; font-size: 11px; background: rgba(255,217,138,.15);
  color: var(--gold); padding: 2px 10px; border-radius: 999px; margin-top: 10px; }

/* ---- 攻略 ---- */
.guide-list li { display: flex; justify-content: space-between; align-items: center; padding: 9px 0;
  border-bottom: 1px dashed rgba(157,148,201,.2); font-size: 14px; }
.viewer-head { display: flex; justify-content: space-between; align-items: center; }
.docx-body { background: #fff; color: #222; border-radius: 10px; padding: 24px; max-height: 70vh; overflow: auto; margin-top: 12px; }
.docx-wrapper { background: none !important; }

/* ---- 其他 ---- */
.progress { height: 6px; background: rgba(157,148,201,.2); border-radius: 999px; margin: 12px 0; overflow: hidden; }
.progress-bar { height: 100%; width: 0; background: linear-gradient(90deg, #8b5cf6, var(--gold)); transition: width .2s; }
.hidden { display: none !important; }
.site-footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; position: relative; z-index: 1; }
dialog { background: var(--bg2); color: var(--text); border: 1px solid var(--card-border);
  border-radius: var(--radius); max-width: 420px; padding: 24px; }
dialog::backdrop { background: rgba(0,0,0,.6); }
dialog p { font-size: 14px; line-height: 1.8; margin: 10px 0; }
dialog h2 { color: var(--gold); }

@media (max-width: 760px) {
  .home-grid { grid-template-columns: 1fr; }
  .header-side { display: none; }
  .welcome-title { font-size: 30px; }
  .post-photos { grid-template-columns: repeat(2, 1fr); }
}