/* ============================
   绛雪 · 水墨丹青主题
   ============================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;700;900&display=swap');

/* ─── 色彩体系：墨·纸·朱·金 ─── */
:root {
  /* 墨色层次 */
  --mo-0:   #0d0d0d;   /* 浓墨 */
  --mo-1:   #1a1a1a;   /* 重墨 */
  --mo-2:   #2e2e2e;   /* 中墨 */
  --mo-3:   #4a4a4a;   /* 淡墨 */
  --mo-4:   #787878;   /* 墨灰 */
  --mo-5:   #a8a8a8;   /* 浅灰 */
  --mo-6:   #d4d4d4;   /* 烟色 */

  /* 宣纸 */
  --zhi-0:  #f8f4ec;   /* 宣纸白 */
  --zhi-1:  #ede8dc;   /* 旧纸 */
  --zhi-2:  #ddd6c8;   /* 纸影 */

  /* 朱砂（印章红，低饱和） */
  --zhu:    #8b2020;   /* 深朱 */
  --zhu-m:  #a83030;   /* 朱砂 */
  --zhu-l:  #c04040;   /* 淡朱 */

  /* 金箔（低饱和古金） */
  --jin:    #7a6020;   /* 古金 */
  --jin-m:  #9a7a30;   /* 金色 */
  --jin-l:  #b89a50;   /* 淡金 */

  /* 石青（低饱和） */
  --qing:   #2a4a44;   /* 深青 */
  --qing-m: #3a6a62;   /* 石青 */

  /* 发光（极克制） */
  --glow-zhu:  0 0 12px rgba(139,32,32,.4);
  --glow-jin:  0 0 12px rgba(122,96,32,.35);
  --glow-mo:   0 0 20px rgba(0,0,0,.6);

  /* 兼容旧变量 */
  --gold:        var(--jin-m);
  --gold-light:  var(--jin-l);
  --gold-pale:   #e8d8a0;
  --gold-deep:   var(--jin);
  --jade-glow:   var(--qing-m);
  --cinnabar:    var(--zhu-l);
  --parchment:   var(--zhi-0);
  --parchment-d: var(--zhi-1);
  --text-muted:  var(--mo-4);
  --text-dim:    var(--mo-5);
  --ink-black:   var(--mo-0);
  --ink-deep:    var(--mo-1);
  --ink-medium:  var(--mo-2);
  --ink-light:   var(--mo-3);
  --glow-gold:   var(--glow-jin);
  --glow-jade:   0 0 12px rgba(58,106,98,.4);
  --glow-blood:  var(--glow-zhu);
}

/* ─── 全局重置 ─── */
*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }

body {
  font-family: 'Noto Serif SC', 'STSong', 'SimSun', serif;
  background-color: var(--mo-1);
  color: var(--zhi-0);
  min-height: 100vh;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

a { color:var(--jin-l); text-decoration:none; transition:color .2s; }
a:hover { color:var(--zhi-0); }
img { max-width:100%; display:block; }

/* ─── 背景粒子 ─── */
#bg-canvas {
  position:fixed; inset:0; z-index:0;
  pointer-events:none; opacity:.15;
}

/* ─── 水墨背景（主界面用纯黑，各页面自行设置背景图） ─── */
.bg-pattern {
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-color: var(--mo-1);
}
.bg-pattern::after { display:none; }

/* ─── 内容层 ─── */
.page-wrapper { position:relative; z-index:1; min-height:100vh; }
.scroll-container { max-width:1300px; margin:0 auto; padding:0 24px; }

/* ─── 水墨分割线 ─── */
.divider {
  display:flex; align-items:center; gap:14px;
  margin:20px 0; color:var(--mo-4);
}
.divider::before, .divider::after {
  content:''; flex:1; height:1px;
  background:linear-gradient(to right,
    transparent, var(--mo-4) 30%, var(--mo-4) 70%, transparent);
}

/* ─── 顶部导航 ─── */
.navbar {
  position:sticky; top:0; z-index:100;
  background:rgba(13,13,13,.96);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(248,244,236,.08);
  box-shadow:0 1px 0 rgba(139,32,32,.3), 0 4px 24px rgba(0,0,0,.6);
  padding:0 24px;
}

.navbar-inner {
  max-width:1300px; margin:0 auto;
  height:68px; display:flex; align-items:center; gap:24px;
}

.site-logo { display:flex; align-items:center; gap:14px; flex-shrink:0; }

.site-logo .logo-char {
  font-size:30px; font-weight:900;
  color:var(--zhi-0);
  text-shadow: 0 0 30px rgba(248,244,236,.2), 0 2px 4px rgba(0,0,0,.8);
  letter-spacing:8px; line-height:1;
  position:relative; text-align:center;
}
.site-logo .logo-char::after {
  content:''; position:absolute;
  bottom:-4px; left:0; right:0; height:1px;
  background:linear-gradient(to right, transparent, var(--zhu-m), transparent);
}

.site-logo .logo-sub {
  font-size:10px; color:var(--mo-5);
  letter-spacing:4px; font-weight:300;
  text-align:center; margin-top:6px;
}

.nav-search { flex:1; max-width:480px; margin:0 auto; position:relative; }

.nav-search input {
  width:100%;
  background:rgba(255,255,255,.04);
  border:none;
  border-bottom:1px solid rgba(248,244,236,.2);
  padding:9px 44px 9px 4px;
  color:var(--zhi-0);
  font-family:inherit; font-size:14px;
  transition:border-color .2s;
  outline:none; letter-spacing:2px;
  background:transparent;
}
.nav-search input::placeholder { color:var(--mo-4); letter-spacing:2px; }
.nav-search input:focus {
  border-bottom-color:var(--zhu-m);
}

.nav-search .search-icon {
  position:absolute; right:4px; top:50%;
  transform:translateY(-50%);
  color:var(--mo-4); cursor:pointer; font-size:14px;
  transition:color .2s;
}
.nav-search .search-icon:hover { color:var(--zhi-0); }

.nav-actions { display:flex; align-items:center; gap:16px; margin-left:auto; }

.nav-btn {
  background:none;
  border:none;
  border-bottom:1px solid rgba(248,244,236,.25);
  color:var(--mo-6);
  padding:6px 4px;
  font-family:inherit; font-size:13px;
  cursor:pointer; transition:all .2s; letter-spacing:3px;
}
.nav-btn:hover {
  color:var(--zhi-0);
  border-bottom-color:var(--zhu-m);
}

.user-avatar-nav {
  width:36px; height:36px; border-radius:50%;
  border:1px solid rgba(248,244,236,.25);
  object-fit:cover; cursor:pointer;
  transition:all .2s; filter:grayscale(20%);
}
.user-avatar-nav:hover {
  border-color:var(--zhu-m);
  filter:grayscale(0%);
  box-shadow:var(--glow-zhu);
}

/* ─── 水墨卡片 ─── */
.jade-card {
  background:rgba(26,26,26,.92);
  border:1px solid rgba(248,244,236,.08);
  border-radius:2px;
  position:relative; overflow:hidden;
  box-shadow:0 4px 24px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.04);
}

.jade-card::before {
  content:''; position:absolute;
  top:0; left:0; right:0; height:1px;
  background:linear-gradient(to right,
    transparent, rgba(139,32,32,.6) 30%,
    rgba(154,122,48,.6) 50%,
    rgba(139,32,32,.6) 70%, transparent);
}

/* ─── 主按钮 ─── */
.btn-primary {
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  background:var(--zhu);
  color:var(--zhi-0);
  font-family:inherit; font-weight:700;
  font-size:14px; letter-spacing:4px;
  padding:11px 32px;
  border:1px solid rgba(248,244,236,.1);
  border-radius:1px;
  cursor:pointer; transition:all .25s;
  box-shadow:0 2px 12px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.08);
  position:relative; overflow:hidden;
}
.btn-primary::before {
  content:''; position:absolute; inset:0;
  background:linear-gradient(135deg,
    rgba(255,255,255,.06) 0%, transparent 50%);
}
.btn-primary:hover {
  background:var(--zhu-m);
  box-shadow:var(--glow-zhu), 0 4px 20px rgba(0,0,0,.5);
  letter-spacing:5px;
}
.btn-primary:active { transform:scale(.97); }

.btn-secondary {
  display:inline-flex; align-items:center; gap:6px;
  background:transparent;
  color:var(--mo-6);
  font-family:inherit; font-size:14px; letter-spacing:3px;
  padding:10px 26px;
  border:1px solid rgba(248,244,236,.2);
  border-radius:1px; cursor:pointer; transition:all .2s;
}
.btn-secondary:hover {
  border-color:var(--qing-m);
  color:var(--zhi-0);
  background:rgba(58,106,98,.1);
}

.btn-danger {
  background:rgba(139,32,32,.8);
  color:var(--zhi-1); font-family:inherit;
  font-size:13px; letter-spacing:2px;
  padding:7px 18px;
  border:1px solid rgba(139,32,32,.4);
  border-radius:1px;
  cursor:pointer; transition:all .2s;
}
.btn-danger:hover {
  background:var(--zhu-m);
  box-shadow:var(--glow-zhu);
}

/* ─── 表单样式 ─── */
.form-group { margin-bottom:24px; }

.form-group label {
  display:block; font-size:12px;
  letter-spacing:4px; color:var(--mo-5);
  margin-bottom:10px; font-weight:300;
  text-transform:uppercase;
}

.form-control {
  width:100%;
  background:rgba(255,255,255,.03);
  border:none;
  border-bottom:1px solid rgba(248,244,236,.2);
  padding:11px 4px;
  color:var(--zhi-0);
  font-family:inherit; font-size:14px;
  outline:none; letter-spacing:2px;
  transition:border-color .2s;
  border-radius:0;
}
.form-control:focus {
  border-bottom-color:var(--zhu-m);
  background:rgba(255,255,255,.02);
}
.form-control::placeholder { color:var(--mo-3); }

select.form-control {
  cursor:pointer; appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='%23a8a8a8'%3E%3Cpath d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 4px center;
  padding-right:24px;
}
select.form-control option { background:var(--mo-1); color:var(--zhi-0); }

.form-hint { font-size:11px; color:var(--mo-4); margin-top:6px; letter-spacing:2px; }
.form-error { font-size:12px; color:var(--zhu-l); margin-top:6px; display:none; letter-spacing:1px; }
.form-error.show { display:block; }

/* ─── 视频卡片 ─── */
.video-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(220px, 1fr));
  gap:16px; padding:20px 0;
}

.video-card {
  cursor:pointer; transition:transform .25s, box-shadow .25s;
  background:rgba(22,22,22,.95);
  border:1px solid rgba(248,244,236,.07);
  border-radius:2px;
  overflow:hidden;
}
.video-card:hover {
  transform:translateY(-4px);
  box-shadow:0 12px 32px rgba(0,0,0,.6), 0 0 0 1px rgba(139,32,32,.3);
}
.video-card:hover .video-thumb::after { opacity:1; }

.video-thumb {
  position:relative; aspect-ratio:16/9;
  background:var(--mo-2); overflow:hidden;
}
.video-thumb img {
  width:100%; height:100%; object-fit:cover;
  filter:grayscale(15%) contrast(1.05);
  transition:transform .3s, filter .3s;
}
.video-card:hover .video-thumb img {
  transform:scale(1.04);
  filter:grayscale(0%) contrast(1.1);
}

.video-thumb::after {
  content:'▶';
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  font-size:32px;
  background:rgba(13,13,13,.6);
  color:var(--zhi-0);
  opacity:0; transition:opacity .2s;
}

.video-thumb .video-duration {
  position:absolute; bottom:6px; right:8px;
  background:rgba(0,0,0,.8);
  color:var(--mo-6); font-size:11px;
  padding:2px 8px; border-radius:1px; letter-spacing:1px;
}

.video-info { padding:12px 12px 10px; }

.video-title {
  font-size:13px; color:var(--zhi-1); line-height:1.6;
  display:-webkit-box; -webkit-line-clamp:2;
  -webkit-box-orient:vertical; overflow:hidden;
  letter-spacing:1px;
}

.video-meta { display:flex; align-items:center; gap:8px; margin-top:8px; }

.uploader-avatar {
  width:20px; height:20px; border-radius:50%;
  border:1px solid rgba(248,244,236,.15); object-fit:cover;
  filter:grayscale(20%);
}

.video-meta-text {
  font-size:11px; color:var(--mo-4);
  display:flex; flex-direction:column; gap:2px;
  letter-spacing:1px;
}

/* ─── 标签页 ─── */
.tabs { display:flex; border-bottom:1px solid rgba(248,244,236,.1); margin-bottom:24px; }

.tab-btn {
  background:none; border:none;
  color:var(--mo-4); font-family:inherit;
  font-size:13px; letter-spacing:4px;
  padding:12px 22px; cursor:pointer;
  position:relative; transition:color .2s;
}
.tab-btn.active { color:var(--zhi-0); }
.tab-btn.active::after {
  content:''; position:absolute;
  bottom:-1px; left:20%; right:20%; height:1px;
  background:var(--zhu-m);
}

/* ─── 头像 ─── */
.avatar-upload {
  position:relative; width:100px; height:100px;
  border-radius:50%;
  border:1px solid rgba(248,244,236,.2);
  overflow:hidden; cursor:pointer;
}
.avatar-upload img { width:100%; height:100%; object-fit:cover; filter:grayscale(10%); }
.avatar-upload:hover::after {
  content:'换像'; position:absolute; inset:0;
  background:rgba(13,13,13,.75);
  display:flex; align-items:center; justify-content:center;
  font-size:12px; color:var(--zhi-0); letter-spacing:3px;
}
.avatar-upload input[type=file] {
  position:absolute; inset:0; opacity:0; cursor:pointer;
  width:100%; height:100%;
}

/* ─── 消息提示 ─── */
.toast-container {
  position:fixed; top:80px; right:24px;
  z-index:9999; display:flex; flex-direction:column; gap:8px;
}

.toast {
  padding:12px 20px; border-radius:1px;
  font-size:13px; letter-spacing:2px;
  min-width:220px; animation:toastIn .3s ease;
  border-left:2px solid;
  backdrop-filter:blur(12px);
}
.toast-success {
  background:rgba(20,30,26,.95);
  border-color:var(--qing-m); color:var(--mo-6);
}
.toast-error {
  background:rgba(26,14,14,.95);
  border-color:var(--zhu-m); color:var(--mo-6);
}
.toast-info {
  background:rgba(22,20,16,.95);
  border-color:var(--jin-m); color:var(--mo-6);
}

@keyframes toastIn {
  from { opacity:0; transform:translateX(30px); }
  to   { opacity:1; transform:translateX(0); }
}

/* ─── 徽章 ─── */
.badge {
  display:inline-block; font-size:10px;
  padding:2px 8px; border-radius:1px; letter-spacing:2px;
}
.badge-admin {
  background:rgba(122,96,32,.2); color:var(--jin-l);
  border:1px solid rgba(122,96,32,.35);
}
.badge-super {
  background:rgba(139,32,32,.2); color:var(--zhu-l);
  border:1px solid rgba(139,32,32,.4);
}
.badge-user {
  background:rgba(42,74,68,.2); color:var(--qing-m);
  border:1px solid rgba(42,74,68,.4);
}

/* ─── 加载动画 ─── */
.loading-overlay {
  position:fixed; inset:0; z-index:9998;
  background:var(--mo-0);
  display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:28px;
}

.loading-title {
  font-size:52px; font-weight:900;
  color:var(--zhi-0);
  text-shadow:0 0 40px rgba(248,244,236,.15), 0 2px 4px rgba(0,0,0,.8);
  letter-spacing:16px;
  animation:pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,100% { opacity:.7; }
  50% { opacity:1; }
}

.loading-dots { display:flex; gap:10px; }
.loading-dots span {
  width:6px; height:6px; border-radius:50%;
  background:var(--mo-4);
  animation:dotBounce 1.4s ease-in-out infinite;
}
.loading-dots span:nth-child(2) { animation-delay:.2s; }
.loading-dots span:nth-child(3) { animation-delay:.4s; }

@keyframes dotBounce {
  0%,80%,100% { transform:scale(0); opacity:.2; }
  40% { transform:scale(1); opacity:.8; }
}

/* ─── 空状态 ─── */
.empty-state { text-align:center; padding:64px 24px; color:var(--mo-4); }
.empty-state .empty-icon { font-size:48px; margin-bottom:16px; opacity:.3; filter:grayscale(100%); }
.empty-state p { font-size:13px; letter-spacing:4px; }

/* ─── 表格 ─── */
.data-table { width:100%; border-collapse:collapse; font-size:13px; }

.data-table th {
  background:rgba(248,244,236,.04);
  color:var(--mo-5); font-weight:400;
  letter-spacing:3px; padding:13px 16px;
  text-align:left;
  border-bottom:1px solid rgba(139,32,32,.4);
}

.data-table td {
  padding:12px 16px;
  border-bottom:1px solid rgba(248,244,236,.05);
  color:var(--zhi-1); vertical-align:middle;
}
.data-table tr:hover td { background:rgba(248,244,236,.02); }

/* ─── 表格头像 ─── */
.table-avatar {
  width:26px; height:26px; border-radius:50%;
  border:1px solid rgba(248,244,236,.15);
  object-fit:cover; margin-right:8px;
  vertical-align:middle; filter:grayscale(15%);
}

/* ─── 筛选标签 ─── */
.filter-chip {
  display:inline-block; padding:4px 14px;
  border:1px solid rgba(248,244,236,.12);
  border-radius:1px; font-size:12px;
  color:var(--mo-4); cursor:pointer;
  transition:all .2s; letter-spacing:2px;
  margin-right:6px; margin-bottom:6px;
}
.filter-chip:hover { border-color:rgba(248,244,236,.3); color:var(--mo-6); }
.filter-chip.active {
  background:rgba(139,32,32,.15);
  border-color:var(--zhu-m); color:var(--zhi-1);
}

/* ─── 操作按钮组 ─── */
.action-group { display:flex; gap:6px; flex-wrap:wrap; }

/* ─── 滚动条 ─── */
::-webkit-scrollbar { width:4px; height:4px; }
::-webkit-scrollbar-track { background:var(--mo-0); }
::-webkit-scrollbar-thumb { background:var(--mo-3); border-radius:2px; }
::-webkit-scrollbar-thumb:hover { background:var(--mo-4); }

/* ─── 响应式 ─── */
@media (max-width:768px) {
  .video-grid { grid-template-columns:repeat(2,1fr); gap:12px; }
  .navbar-inner { gap:12px; }
  .nav-search { max-width:200px; }
  .scroll-container { padding:0 16px; }
}
@media (max-width:480px) {
  .video-grid { grid-template-columns:1fr; }
  .nav-search { display:none; }
  .loading-title { font-size:36px; }
}