/* ========================================================
   怕酱服务器 O3 预备管理员考试系统 - 液态玻璃 (Liquid Glass) UI
   Design System: Apple-style frosted glass + specular highlights
   ======================================================== */

:root {
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-strong: rgba(255, 255, 255, 0.85);
  --glass-bg-light: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.55);
  --glass-border-subtle: rgba(255, 255, 255, 0.3);
  --glass-highlight: rgba(255, 255, 255, 0.7);
  --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.08);
  --glass-shadow-strong: 0 12px 48px rgba(31, 38, 135, 0.12);
  --blur-glass: blur(20px) saturate(180%);
  --blur-heavy: blur(40px) saturate(200%);
  --blur-light: blur(12px) saturate(150%);
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --color-primary: #0071e3;
  --color-primary-hover: #0077ed;
  --color-danger: #ff3b30;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-text: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-text-tertiary: #86868b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 999px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: #f0f4ff;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== 动态彩色光晕背景 (Liquid Glass 需要有东西可以折射) ========== */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  z-index: 0;
  pointer-events: none;
  will-change: transform;
}
body::before {
  width: 600px; height: 600px;
  top: -200px; left: -100px;
  background: radial-gradient(circle, rgba(0, 113, 227, 0.25), rgba(123, 86, 199, 0.15) 50%, transparent 70%);
  animation: orbFloat1 20s ease-in-out infinite;
}
body::after {
  width: 500px; height: 500px;
  bottom: -150px; right: -100px;
  background: radial-gradient(circle, rgba(255, 149, 0, 0.2), rgba(255, 59, 48, 0.1) 50%, transparent 70%);
  animation: orbFloat2 25s ease-in-out infinite;
}
/* 第三颗光球 */
body > .orb-3 {
  position: fixed;
  width: 400px; height: 400px;
  top: 40%; left: 50%;
  border-radius: 50%;
  filter: blur(100px);
  background: radial-gradient(circle, rgba(52, 199, 89, 0.12), rgba(0, 199, 190, 0.08) 50%, transparent 70%);
  z-index: 0;
  pointer-events: none;
  animation: orbFloat3 30s ease-in-out infinite;
  will-change: transform;
}
@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(100px, 80px) scale(1.1); }
  66%  { transform: translate(50px, 120px) scale(0.95); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(-80px, -60px) scale(1.05); }
  66%  { transform: translate(-40px, -100px) scale(1.1); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%  { transform: translate(-30%, -60%) scale(1.2); }
}
/* 降低运动偏好：禁用光球动画 */
@media (prefers-reduced-motion: reduce) {
  body::before, body::after, .orb-3 { animation: none !important; opacity: 0.5; }
}

/* 确保所有内容在光球之上 */
.top-bar, .side-nav, .main-content, .footer, #global-announcement, #ann-popup-overlay {
  position: relative;
  z-index: 1;
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  background-clip: padding-box;
  transition: background 0.3s;
}
::-webkit-scrollbar-thumb:hover { background: rgba(0, 0, 0, 0.28); background-clip: padding-box; }

/* ========== 文本选中 ========== */
::selection { background: rgba(0, 113, 227, 0.25); color: inherit; }

/* ========== 通用工具类 ========== */
.muted { color: var(--color-text-tertiary); font-size: 13px; }
.green { color: var(--color-success); }
.red { color: var(--color-danger); }

/* ========== ======== 登录页 ======== ========== */
.login-page {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}
/* 登录页隐藏全局光球 */
.login-page > .orb-3 { display: none; }
/* 登录页额外光球 */
.login-page::before {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  top: -200px; right: -200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 60%);
  filter: blur(60px);
  animation: loginOrb1 15s ease-in-out infinite;
}
.login-page::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  bottom: -100px; left: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,59,48,0.2), transparent 60%);
  filter: blur(60px);
  animation: loginOrb2 18s ease-in-out infinite reverse;
}
@keyframes loginOrb1 {
  0%,100% { transform: translate(0,0); }
  50% { transform: translate(-80px, 60px); }
}
@keyframes loginOrb2 {
  0%,100% { transform: translate(0,0); }
  50% { transform: translate(60px, -80px); }
}
.login-wrap {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
  position: relative; z-index: 2;
}
.login-card {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-xl);
  padding: 40px 44px;
  width: 100%; max-width: 460px;
  box-shadow:
    0 24px 80px rgba(31, 38, 135, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
  animation: loginBounce 0.7s var(--ease-spring) both;
}
/* 卡片顶部高光条 */
.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
  border-radius: 2px;
}
.login-title {
  margin: 0 0 6px;
  font-size: 24px; font-weight: 700;
  color: var(--color-text);
  text-align: center;
  letter-spacing: -0.02em;
}
.login-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 14px;
  margin: 0 0 28px;
}
.login-form label { display: block; margin-bottom: 16px; }
.login-form label > span {
  display: block; font-size: 13px;
  margin-bottom: 6px; color: var(--color-text-secondary);
  font-weight: 500;
}
.login-form input[type="text"], .login-form input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-md);
  font-size: 15px; outline: none;
  transition: all 0.3s var(--ease-apple);
  color: var(--color-text);
}
.login-form input:focus {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
  transform: translateY(-1px);
}
.login-form .btn.primary { width: 100%; margin-top: 12px; padding: 12px; font-size: 15px; }
.role-switch {
  display: flex; gap: 8px; margin: 8px 0 16px;
  font-size: 14px;
}
.role-switch label {
  flex: 1; text-align: center;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.4);
  border: 1px solid rgba(0,0,0,0.06);
  cursor: pointer;
  margin-bottom: 0;
  transition: all 0.25s var(--ease-apple);
  font-weight: 500;
  color: var(--color-text-secondary);
}
.role-switch label:hover {
  background: rgba(255,255,255,0.6);
  transform: translateY(-1px);
}
.role-switch input[type="radio"] { display: none; }
.role-switch input[type="radio"]:checked + span {
  /* handled by wrapper */
}
.role-switch label:has(input:checked) {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}
.login-tip { margin-top: 18px; text-align: center; font-size: 12px; color: var(--color-text-tertiary); }
.footer-note {
  color: rgba(255,255,255,0.9);
  margin-top: 16px; font-size: 12px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
  position: relative; z-index: 2;
}
.changelog-link-wrap {
  text-align: center;
  margin-top: 16px;
}
.changelog-link {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  transition: all 0.25s var(--ease-apple);
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.changelog-link:hover {
  color: rgba(255, 255, 255, 1);
  border-bottom-color: rgba(255, 255, 255, 0.9);
}

/* ========== ======== 通用布局 ======== ========== */
.top-bar {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  padding: 12px 28px;
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 0 rgba(0,0,0,0.03), 0 4px 20px rgba(0,0,0,0.03);
}
.brand {
  font-weight: 700; color: var(--color-text);
  font-size: 17px; letter-spacing: -0.01em;
  background: linear-gradient(135deg, #0071e3, #7a56c7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.user-box { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.uname { color: var(--color-text); font-weight: 500; }

.side-nav {
  position: fixed; top: 52px; left: 0;
  width: 210px; height: calc(100vh - 52px);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-right: 1px solid rgba(255, 255, 255, 0.4);
  padding: 16px 12px;
  display: flex; flex-direction: column; gap: 4px;
  z-index: 99;
}
.side-nav a {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  text-decoration: none; font-size: 14px;
  font-weight: 500;
  position: relative;
  transition: all 0.25s var(--ease-apple);
  overflow: hidden;
}
.side-nav a::before {
  content: '';
  position: absolute;
  left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 0;
  background: var(--color-primary);
  border-radius: 0 3px 3px 0;
  transition: height 0.25s var(--ease-apple);
}
.side-nav a:hover {
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-primary);
  transform: translateX(4px);
}
.side-nav a:hover::before { height: 60%; }
.side-nav a.active {
  background: rgba(0, 113, 227, 0.12);
  color: var(--color-primary);
}
.side-nav a.active::before { height: 60%; }
.side-nav-divider {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  margin: 12px 8px 8px;
}

.main-content {
  margin-left: 220px; padding: 28px 32px;
  min-height: calc(100vh - 52px);
  position: relative; z-index: 1;
}
.footer {
  text-align: center; color: var(--color-text-tertiary);
  padding: 20px 14px; font-size: 12px;
  margin-left: 210px;
  position: relative; z-index: 1;
}
.page-title {
  margin: 0 0 24px;
  font-size: 26px; font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 16px;
  animation: titleSlideIn 0.5s var(--ease-apple) both;
}
.page-title::before {
  content: '';
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 4px;
  background: linear-gradient(180deg, var(--color-primary), #7a56c7);
  border-radius: 4px;
}
@keyframes titleSlideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ========== ======== 按钮 ======== ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 20px;
  border: none; border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 14px; font-weight: 500;
  text-decoration: none; line-height: 1.4;
  background: rgba(0, 0, 0, 0.04);
  color: var(--color-text);
  backdrop-filter: blur(8px);
  transition: all 0.25s var(--ease-apple);
  position: relative;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.btn::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255,255,255,0.25), transparent 50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}
.btn:hover {
  background: rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.btn:hover::after { opacity: 1; }
.btn:active {
  transform: scale(0.96) translateY(0);
  box-shadow: 0 2px 4px rgba(0,0,0,0.06);
}
.btn.primary {
  background: linear-gradient(135deg, #0071e3, #0077ed);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}
.btn.primary::after {
  background: linear-gradient(180deg, rgba(255,255,255,0.3), transparent 50%);
  opacity: 1;
}
.btn.primary:hover {
  background: linear-gradient(135deg, #0077ed, #0084ff);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
}
.btn.danger {
  background: rgba(255, 59, 48, 0.1);
  color: var(--color-danger);
}
.btn.danger:hover {
  background: rgba(255, 59, 48, 0.18);
  box-shadow: 0 4px 12px rgba(255, 59, 48, 0.15);
}
.btn.success {
  background: rgba(52, 199, 89, 0.12);
  color: var(--color-success);
}
.btn.success:hover {
  background: rgba(52, 199, 89, 0.2);
}
.btn.link {
  background: transparent; color: var(--color-primary);
  padding: 6px 12px;
  box-shadow: none;
}
.btn.link:hover {
  background: rgba(0, 113, 227, 0.08);
  box-shadow: none;
  transform: none;
}
.btn.small { padding: 5px 14px; font-size: 12px; border-radius: 14px; }
.btn.large { padding: 12px 28px; font-size: 16px; }

/* ========== ======== 玻璃卡片 ======== ========== */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  box-shadow:
    var(--glass-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  animation: cardSlideUp 0.5s var(--ease-apple) both;
}
/* 卡片顶部高光折射 */
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
}
.card h3 {
  margin: 0 0 16px;
  font-size: 17px; font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

/* 入场动画延迟（瀑布流） */
.card:nth-of-type(1) { animation-delay: 0.05s; }
.card:nth-of-type(2) { animation-delay: 0.1s; }
.card:nth-of-type(3) { animation-delay: 0.15s; }
.card:nth-of-type(4) { animation-delay: 0.2s; }
.card:nth-of-type(5) { animation-delay: 0.25s; }
.card:nth-of-type(6) { animation-delay: 0.3s; }

@keyframes cardSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ========== 统计卡片网格 ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  text-align: center;
  box-shadow:
    var(--glass-shadow),
    inset 0 1px 0 rgba(255,255,255,0.8);
  position: relative; overflow: hidden;
  transition: all 0.35s var(--ease-apple);
  animation: cardSlideUp 0.5s var(--ease-apple) both;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #7a56c7);
  opacity: 0; transition: opacity 0.3s;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-strong), inset 0 1px 0 rgba(255,255,255,0.9);
}
.stat-card:hover::before { opacity: 1; }
.stat-card .num {
  font-size: 32px; font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), #7a56c7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-card .lbl {
  margin-top: 6px; font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 500;
}
/* 仪表盘专用统计卡 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-grid .stat-card {
  text-align: left;
  padding: 24px;
}
.stat-num {
  font-size: 38px; font-weight: 700;
  background: linear-gradient(135deg, #1d1d1f, #0071e3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-label { font-size: 14px; color: var(--color-text-secondary); margin: 6px 0; font-weight: 500; }
.stat-detail { font-size: 12px; color: var(--color-text-tertiary); margin-top: 4px; }

.grid-two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ========== ======== 数据表格 ======== ========== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.3);
}
.data-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
.data-table th, .data-table td {
  padding: 12px 16px; text-align: left;
  border-bottom: 1px solid rgba(0,0,0,0.04);
  vertical-align: middle;
}
.data-table th {
  background: rgba(245, 247, 252, 0.8);
  backdrop-filter: blur(8px);
  color: var(--color-text-secondary);
  font-weight: 600; font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: sticky; top: 0;
}
.data-table th:first-child { border-radius: var(--radius-md) 0 0 0; }
.data-table th:last-child { border-radius: 0 var(--radius-md) 0 0; }
.data-table tbody tr {
  transition: all 0.2s var(--ease-apple);
  background: transparent;
}
.data-table tbody tr:hover {
  background: rgba(0, 113, 227, 0.04);
  transform: scale(1.002);
}
.data-table tbody tr:hover td {
  background: rgba(0, 113, 227, 0.02);
}
.data-table tbody tr:last-child td { border-bottom: none; }
.actions-cell { white-space: nowrap; display: flex; gap: 6px; }

/* ========== 角色标签 & 状态徽章 ========== */
.role-tag {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 600; color: #fff;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}
.role-tag.role-admin {
  background: linear-gradient(135deg, #ff3b30, #ff6b6b);
}
.role-tag.role-grader {
  background: linear-gradient(135deg, #34c759, #30d158);
}
.role-tag.role-examiner {
  background: linear-gradient(135deg, #0071e3, #5ac8fa);
}
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.02em;
}
.badge.status-draft    { background: rgba(255, 149, 0, 0.12); color: #b87400; }
.badge.status-published{ background: rgba(52, 199, 89, 0.12); color: #248a3d; }
.badge.status-closed   { background: rgba(142, 142, 147, 0.12); color: #6e6e73; }
.badge.status-submitted{ background: rgba(0, 113, 227, 0.12); color: #0071e3; }
.badge.status-graded   { background: rgba(52, 199, 89, 0.12); color: #248a3d; }

/* ========== ======== 表单 ======== ========== */
.row-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; align-items: end;
}
.row-form label {
  display: flex; flex-direction: column; gap: 6px;
  transition: transform 0.2s var(--ease-apple);
}
.row-form label:hover { transform: translateY(-2px); }
.row-form label > span {
  font-size: 12px; color: var(--color-text-secondary);
  font-weight: 500;
}
.row-form input, .row-form select, .row-form textarea,
input[type="text"], input[type="password"], input[type="number"],
input[type="email"], input[type="file"], select, textarea {
  padding: 10px 14px;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-sm);
  font-size: 14px; outline: none;
  font-family: inherit;
  color: var(--color-text);
  transition: all 0.25s var(--ease-apple);
  -webkit-appearance: none;
}
textarea { resize: vertical; min-height: 80px; line-height: 1.6; }
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
  transform: translateY(-1px);
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236e6e73' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 34px;
  cursor: pointer;
}
.alert {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  font-size: 14px;
  backdrop-filter: blur(12px);
  border: 1px solid transparent;
  animation: alertSlide 0.35s var(--ease-apple) both;
}
@keyframes alertSlide {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.alert.error {
  background: rgba(255, 59, 48, 0.08);
  border-color: rgba(255, 59, 48, 0.15);
  color: #d70015;
}
.alert.success {
  background: rgba(52, 199, 89, 0.08);
  border-color: rgba(52, 199, 89, 0.2);
  color: #248a3d;
}

.info-row { display: flex; flex-wrap: wrap; gap: 20px; font-size: 14px; padding: 8px 0; }
.check-group {
  display: flex; flex-direction: column; gap: 4px;
  max-height: 260px; overflow-y: auto; margin-bottom: 12px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.015);
}
.check-group label {
  font-size: 14px; padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  display: flex; align-items: center; gap: 8px;
}
.check-group label:hover { background: rgba(0, 113, 227, 0.06); }

/* ========== 公告横幅 ========== */
#global-announcement {
  background: linear-gradient(135deg, rgba(255, 204, 0, 0.15), rgba(255, 149, 0, 0.12));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #856404;
  padding: 12px 44px 12px 20px;
  position: relative;
  margin: 0 0 8px 210px;
  border-bottom: 1px solid rgba(255, 193, 7, 0.25);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 14px; line-height: 1.6;
  box-shadow: 0 4px 16px rgba(255, 193, 7, 0.08);
  animation: bannerDrop 0.5s var(--ease-apple) both;
}
#global-announcement .ann-close {
  position: absolute; right: 14px; top: 10px;
  cursor: pointer; font-size: 20px; font-weight: bold;
  color: #856404;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  transition: all 0.2s var(--ease-apple);
  line-height: 1;
}
#global-announcement .ann-close:hover {
  background: rgba(0,0,0,0.08);
  transform: rotate(90deg);
}
@keyframes bannerDrop {
  from { opacity: 0; transform: translateY(-100%); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== ======== 公告弹窗（Liquid Glass Modal）======== ========== */
#ann-popup-overlay {
  display: flex; position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  z-index: 99999;
  align-items: center; justify-content: center;
  animation: overlayFade 0.3s ease both;
}
@keyframes overlayFade { from { opacity: 0; } to { opacity: 1; } }
.ann-popup-card {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-xl);
  max-width: 560px; width: 90%;
  box-shadow:
    0 24px 80px rgba(0,0,0,0.2),
    inset 0 1px 0 rgba(255,255,255,0.9);
  padding: 32px 36px 24px;
  position: relative;
  animation: modalPop 0.45s var(--ease-spring) both;
  overflow: hidden;
}
.ann-popup-card::before {
  content: '';
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,1), transparent);
}
.ann-popup-card #ann-close-btn {
  position: absolute; top: 14px; right: 18px;
  background: rgba(0,0,0,0.05); border: none;
  width: 28px; height: 28px;
  border-radius: 50%;
  cursor: pointer; color: var(--color-text-secondary);
  font-size: 16px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.ann-popup-card #ann-close-btn:hover {
  background: rgba(0,0,0,0.1);
  color: var(--color-text);
  transform: rotate(90deg);
}
.ann-popup-body {
  font-size: 15px; line-height: 1.8; color: var(--color-text);
  max-height: 50vh; overflow-y: auto;
}
.ann-popup-body h4 { margin: 0 0 12px; font-size: 18px; }
.ann-popup-body ul { padding-left: 20px; }
.ann-popup-body li { margin-bottom: 6px; }
.ann-popup-body p { margin-bottom: 10px; }
#ann-countdown {
  text-align: center; margin-top: 20px;
  font-size: 12px; color: var(--color-text-tertiary);
  padding-top: 12px;
  border-top: 1px solid rgba(0,0,0,0.06);
}
@keyframes modalPop {
  0% { opacity: 0; transform: scale(0.88) translateY(20px); }
  60% { transform: scale(1.02) translateY(-4px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* ========== 登录弹入 ========== */
@keyframes loginBounce {
  0% { opacity: 0; transform: translateY(40px) scale(0.94); }
  60% { opacity: 1; transform: translateY(-6px) scale(1.01); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* ========== 公告 Tab ========== */
.ann-tabs {
  display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap;
}
.ann-tab {
  padding: 7px 16px;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.5);
  color: var(--color-text-secondary);
  cursor: pointer; font-size: 13px;
  font-weight: 500;
  transition: all 0.25s var(--ease-apple);
  backdrop-filter: blur(8px);
}
.ann-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(0,113,227,0.06);
  transform: translateY(-1px);
}
.ann-tab.active {
  background: linear-gradient(135deg, #0071e3, #0077ed);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0,113,227,0.3);
}
.ann-panel { margin-top: 6px; }
.ann-textarea {
  width: 100%; min-height: 120px;
  padding: 14px;
  border-radius: var(--radius-md);
  font-size: 14px; line-height: 1.7;
}

/* ========== 分页 ========== */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0,0,0,0.06);
  text-decoration: none; color: var(--color-text);
  font-size: 13px; font-weight: 500;
  transition: all 0.2s var(--ease-apple);
}
.pagination a:hover {
  background: var(--color-primary); color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,113,227,0.25);
}
.pagination .current {
  background: var(--color-primary); color: #fff;
  border-color: var(--color-primary);
}
.pagination .disabled { opacity: 0.4; pointer-events: none; }

/* ========== ======== 答题页 ======== ========== */
.exam-bar {
  background: rgba(255,255,255,0.75);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  padding: 14px 26px;
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.4);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  position: sticky; top: 0; z-index: 50;
}
.exam-bar h2 { margin: 0; font-size: 18px; font-weight: 700; color: var(--color-text); letter-spacing: -0.01em; }
.exam-bar .right { display: flex; gap: 14px; align-items: center; font-size: 14px; }
.timer {
  font-weight: 600; color: var(--color-success);
  padding: 4px 14px;
  background: rgba(52, 199, 89, 0.12);
  border-radius: var(--radius-pill);
  font-variant-numeric: tabular-nums;
}
.timer.warning { color: var(--color-warning); background: rgba(255, 149, 0, 0.12); animation: pulse 1s ease-in-out infinite; }
.timer.danger { color: var(--color-danger); background: rgba(255, 59, 48, 0.12); animation: pulse 0.5s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.warn {
  color: var(--color-warning); font-weight: 500;
  padding: 4px 14px;
  background: rgba(255, 149, 0, 0.1);
  border-radius: var(--radius-pill);
}
.exam-hint {
  margin: 16px 28px;
  padding: 12px 18px;
  background: rgba(0, 113, 227, 0.06);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 113, 227, 0.1);
  border-left: 3px solid var(--color-primary);
  color: #0051a2;
  font-size: 13px;
  border-radius: var(--radius-md);
  animation: cardSlideUp 0.4s var(--ease-apple) both;
}
.exam-main { padding: 8px 28px 60px; }
.doc-frame {
  background: rgba(255,255,255,0.8);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  box-shadow: var(--glass-shadow);
  line-height: 1.85;
  max-width: 860px; margin: 0 auto;
  animation: cardSlideUp 0.5s var(--ease-apple) 0.1s both;
}
.doc-frame h3 {
  margin: 0 0 16px; font-size: 18px;
  color: var(--color-text); font-weight: 700;
}
.answer-frame {
  background: rgba(255,255,255,0.8);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
  box-shadow: var(--glass-shadow);
  animation: cardSlideUp 0.5s var(--ease-apple) 0.15s both;
}
.answer-frame h3 {
  margin: 0 0 12px; font-size: 16px;
  color: var(--color-text); font-weight: 700;
}
.answer-area:focus { outline: none; }
/* 答题区输入框也用玻璃质感 */
.answer-area[contenteditable="true"] {
  min-height: 200px;
  padding: 14px 16px;
  border: 1.5px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  transition: all 0.25s var(--ease-apple);
  line-height: 1.8;
  font-size: 14px;
}
.answer-area[contenteditable="true"]:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 0 4px rgba(0,113,227,0.12);
}
.answer-float {
  position: fixed;
  width: 580px; min-height: 380px; max-height: 78vh;
  display: flex; flex-direction: column;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius-lg);
  box-shadow:
    0 16px 60px rgba(0, 0, 0, 0.14),
    0 4px 16px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);
  z-index: 99999; overflow: hidden;
  transition: width 0.35s var(--ease-apple),
              min-height 0.35s var(--ease-apple),
              box-shadow 0.3s var(--ease-apple);
}
.answer-float::before {
  content: '';
  position: absolute;
  top: 38px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
  z-index: 2; pointer-events: none;
}
.answer-float.minimized {
  width: 260px !important; min-height: 0 !important; max-height: 46px;
}
.answer-float.minimized .af-body,
.answer-float.minimized .af-footer { display: none; }
.answer-float.minimized .af-header {
  padding: 10px 16px; font-size: 13px; border-radius: var(--radius-lg);
}
.answer-float.minimized .window-dots { opacity: 0.5; }
.answer-float.minimized .af-actions button { font-size: 11px; padding: 3px 8px; }
/* macOS 风格标题栏 */
.answer-float .af-header {
  cursor: grab; user-select: none;
  background: linear-gradient(180deg, rgba(40,40,45,0.96), rgba(28,28,32,0.94));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #f5f5f7;
  padding: 12px 18px;
  display: flex; align-items: center; gap: 12px;
  font-weight: 600; font-size: 14px;
  letter-spacing: -0.01em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.answer-float .af-header:active { cursor: grabbing; }
.answer-float .af-header .window-dots {
  display: flex; gap: 8px; flex-shrink: 0;
}
.answer-float .af-header .window-dots span {
  width: 12px; height: 12px; border-radius: 50%;
  opacity: 0.9;
  transition: transform 0.2s;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 1px 1px rgba(0,0,0,0.2);
}
.answer-float .af-header .window-dots span:hover { transform: scale(1.15); }
.window-dots .dot-red { background: radial-gradient(circle at 30% 30%, #ff8080, #ff5f57); }
.window-dots .dot-yellow { background: radial-gradient(circle at 30% 30%, #ffd04f, #febc2e); }
.window-dots .dot-green { background: radial-gradient(circle at 30% 30%, #5ade68, #28c840); }
.answer-float .af-header .af-title {
  flex: 1; text-align: center; font-size: 13px;
  opacity: 0.9; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.answer-float .af-header .af-actions {
  display: flex; gap: 5px; flex-shrink: 0;
}
.answer-float .af-header .af-actions button {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: #ccc; cursor: pointer;
  padding: 4px 10px; border-radius: 6px;
  font-size: 12px; font-weight: 500;
  transition: all 0.2s var(--ease-apple);
}
.answer-float .af-header .af-actions button:hover {
  background: rgba(255,255,255,0.2); color: #fff;
}
.answer-float .af-header .af-actions button.active-size {
  background: rgba(255,255,255,0.25); color: #fff; font-weight: 600;
}

.answer-float .af-body {
  flex: 1; overflow: auto;
  padding: 14px 18px 10px;
  background: transparent;
}
.answer-float .af-body .template-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  padding: 10px 12px;
  background: rgba(0, 113, 227, 0.04);
  border: 1px solid rgba(0, 113, 227, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 10px; font-size: 12px;
}
.template-bar .label { color: #0066cc; font-weight: 600; margin-right: 4px; }
.template-bar button {
  border: 1px solid rgba(0,113,227,0.15);
  background: rgba(255,255,255,0.7);
  color: #0066cc;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  cursor: pointer; font-size: 11px;
  font-weight: 500;
  transition: all 0.2s var(--ease-apple);
  backdrop-filter: blur(4px);
}
.template-bar button:hover {
  background: rgba(0,113,227,0.1);
  border-color: rgba(0,113,227,0.3);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,113,227,0.1);
}
.answer-float .af-body .answer-area {
  min-height: 260px;
  max-height: calc(78vh - 220px);
  overflow: auto;
  border: 1.5px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-md);
  padding: 16px; line-height: 1.8; outline: none;
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(8px);
  transition: border-color 0.25s var(--ease-apple),
              box-shadow 0.25s var(--ease-apple),
              background 0.25s;
  font-size: 14px;
}
.answer-float .af-body .answer-area:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 0 4px rgba(0,113,227,0.12);
}
.answer-float .af-footer {
  padding: 10px 18px;
  border-top: 1px solid rgba(0,0,0,0.05);
  display: flex; align-items: center; gap: 10px;
  justify-content: space-between;
  background: rgba(245,245,247,0.5);
  backdrop-filter: blur(10px);
}
.af-footer .muted { color: var(--color-text-tertiary); font-size: 12px; }
.af-footer .btn { font-size: 13px; padding: 7px 18px; border-radius: var(--radius-pill); }

/* 文档上传内联 */
.doc-upload-inline {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 14px;
  background: rgba(0,0,0,0.03);
  border-radius: var(--radius-pill);
  font-size: 12px;
  backdrop-filter: blur(8px);
}
.doc-upload-inline .upload-icon { font-size: 15px; }
.doc-upload-inline .upload-label { color: var(--color-text-tertiary); }
.doc-upload-inline .upload-name {
  color: var(--color-text); font-weight: 500;
  max-width: 120px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.doc-upload-inline .btn-upload {
  border: none;
  background: rgba(0,113,227,0.1);
  color: var(--color-primary);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer; font-size: 12px;
  font-weight: 500; transition: all 0.2s var(--ease-apple);
}
.doc-upload-inline .btn-upload:hover {
  background: rgba(0,113,227,0.18);
  transform: translateY(-1px);
}
.doc-upload-inline .btn-upload.primary {
  background: linear-gradient(135deg, #0071e3, #0077ed);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,113,227,0.25);
}
.doc-upload-inline .btn-upload.primary:hover {
  box-shadow: 0 4px 12px rgba(0,113,227,0.35);
}

/* ========== ======== 响应式 ======== ========== */
@media (max-width: 1024px) {
  .side-nav { width: 190px; }
  .main-content { margin-left: 200px; padding: 20px; }
  .footer { margin-left: 190px; }
  #global-announcement { margin-left: 190px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-two { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  body::before, body::after, body > .orb-3 { opacity: 0.3; }
  .side-nav {
    position: static; width: 100%; height: auto;
    flex-direction: row; flex-wrap: wrap;
    padding: 10px; border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.4);
  }
  .side-nav a { flex: 1 1 30%; text-align: center; padding: 8px; font-size: 13px; }
  .side-nav a:hover { transform: translateY(-2px); }
  .main-content, .footer { margin-left: 0; padding: 16px; }
  #global-announcement { margin-left: 0; }
  .top-bar { padding: 10px 16px; }
  .brand { font-size: 15px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .data-table th, .data-table td { padding: 8px 10px; font-size: 13px; }
  .page-title { font-size: 22px; }
}

@media print { body { display: none !important; } }

/* ========== ======== 更新日志页面 ======== ========== */
.changelog-page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.changelog-page-header .page-title {
  margin: 0;
}
.changelog-back-btn {
  white-space: nowrap;
}
.changelog-search-bar {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow:
    var(--glass-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  position: relative;
  overflow: hidden;
  animation: cardSlideUp 0.5s var(--ease-apple) both;
}
.changelog-search-bar::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
}
.changelog-search-form {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.changelog-search-input {
  width: 280px;
  padding: 10px 16px;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-pill);
  font-size: 14px;
  outline: none;
  font-family: inherit;
  color: var(--color-text);
  transition: all 0.25s var(--ease-apple);
}
.changelog-search-input:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
  transform: translateY(-1px);
}
.changelog-type-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.changelog-filter-tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(0,0,0,0.06);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s var(--ease-apple);
  backdrop-filter: blur(8px);
}
.changelog-filter-tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(0,113,227,0.06);
  transform: translateY(-1px);
}
.changelog-filter-tag.active {
  background: linear-gradient(135deg, #0071e3, #0077ed);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0,113,227,0.3);
}

.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.changelog-card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  box-shadow:
    var(--glass-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  position: relative;
  overflow: hidden;
  transition: all 0.35s var(--ease-apple);
  animation: cardSlideUp 0.5s var(--ease-apple) both;
}
.changelog-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
}
.changelog-card:hover {
  transform: translateY(-4px);
  box-shadow:
    var(--glass-shadow-strong),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
.changelog-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.changelog-version {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #0071e3, #7a56c7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.changelog-date {
  font-size: 13px;
  color: var(--color-text-tertiary);
  font-weight: 500;
}
.changelog-card-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.changelog-title-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.changelog-card-content {
  line-height: 1.7;
  color: var(--color-text);
  font-size: 14px;
}
.changelog-card-content p {
  margin-bottom: 10px;
}
.changelog-card-content ul,
.changelog-card-content ol {
  padding-left: 22px;
  margin-bottom: 10px;
}
.changelog-card-content li {
  margin-bottom: 6px;
}
.changelog-card-content h1,
.changelog-card-content h2,
.changelog-card-content h3,
.changelog-card-content h4 {
  margin: 16px 0 10px;
  font-weight: 600;
}
.changelog-card-content h1 { font-size: 20px; }
.changelog-card-content h2 { font-size: 18px; }
.changelog-card-content h3 { font-size: 16px; }
.changelog-card-content h4 { font-size: 15px; }
.changelog-card-content code {
  background: rgba(0,0,0,0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, "Courier New", monospace;
  font-size: 13px;
}
.changelog-card-content pre {
  background: rgba(0,0,0,0.04);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 12px 0;
}
.changelog-card-content pre code {
  background: none;
  padding: 0;
}
.changelog-card-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 16px;
  margin: 12px 0;
  color: var(--color-text-secondary);
  background: rgba(0, 113, 227, 0.04);
  padding: 12px 16px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.changelog-card-content a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 113, 227, 0.3);
  transition: all 0.2s;
}
.changelog-card-content a:hover {
  border-bottom-color: var(--color-primary);
}

.changelog-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.changelog-badge.badge-feature {
  background: rgba(0, 113, 227, 0.12);
  color: #0071e3;
}
.changelog-badge.badge-improvement {
  background: rgba(52, 199, 89, 0.12);
  color: #248a3d;
}
.changelog-badge.badge-bugfix {
  background: rgba(255, 149, 0, 0.12);
  color: #b87400;
}
.changelog-badge.badge-security {
  background: rgba(255, 59, 48, 0.12);
  color: #d70015;
}
.changelog-badge.badge-other {
  background: rgba(142, 142, 147, 0.12);
  color: #6e6e73;
}

.changelog-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text-tertiary);
  animation: cardSlideUp 0.5s var(--ease-apple) both;
}

/* ========== 更新日志响应式 ========== */
@media (max-width: 768px) {
  .changelog-search-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 14px;
  }
  .changelog-search-form {
    flex-direction: column;
    align-items: stretch;
  }
  .changelog-search-input {
    width: 100%;
  }
  .changelog-search-form .btn {
    width: 100%;
  }
  .changelog-type-filters {
    justify-content: center;
  }
  .changelog-card {
    padding: 20px 22px;
  }
  .changelog-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .changelog-version {
    font-size: 24px;
  }
  .changelog-card-title {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .changelog-title-text {
    font-size: 16px;
  }
}