:root {
  --ocean-900: #021526;
  --ocean-800: #03223f;
  --ocean-700: #0a4a63;
  --ocean-600: #0e6e99;
  --ocean-500: #1496d6;
  --ocean-400: #38bdf8;
  --ocean-300: #67e8f9;
  --ocean-200: #a5f3fc;
  --ocean-100: #cffafe;
  --sand-50: #f0f9ff;
  --sand-100: #e0f2fe;
  --ink: #f0f9ff;
  --muted: #94a3b8;
  --danger: #f87171;
  --success: #4ade80;
  --warn: #fbbf24;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
  --font: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.12);
}

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

body {
  font-family: var(--font);
  color: var(--ink);
  background: #021526;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* ===== 水下背景 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 80%, rgba(14,110,153,0.4) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(56,189,248,0.3) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(10,74,99,0.5) 0%, transparent 70%),
    linear-gradient(180deg, #021526 0%, #03223f 20%, #0a4a63 50%, #0e6e99 80%, #1496d6 100%);
  z-index: -2;
}

/* ===== 光线效果 ===== */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 30% 20%, rgba(56,189,248,0.08) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 40%, rgba(103,232,249,0.06) 0%, transparent 35%),
    radial-gradient(ellipse at 50% 10%, rgba(165,243,252,0.05) 0%, transparent 30%);
  animation: light-ray 20s ease-in-out infinite;
  z-index: -1;
  pointer-events: none;
}

@keyframes light-ray {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -1%) rotate(1deg); }
  66% { transform: translate(-1%, 2%) rotate(-1deg); }
}

a { color: var(--ocean-300); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--ocean-200); }

/* ===== 气泡动画 ===== */
@keyframes bubble-rise {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.3; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

@keyframes bubble-wobble {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(5px); }
  75% { transform: translateX(-5px); }
}

.bubbles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bubble {
  position: absolute;
  bottom: -20px;
  width: var(--size, 8px);
  height: var(--size, 8px);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.5), rgba(103,232,249,0.2));
  border: 1px solid rgba(255,255,255,0.2);
  animation: bubble-rise var(--dur, 12s) var(--delay, 0s) infinite ease-in,
             bubble-wobble 3s ease-in-out infinite;
  left: var(--x, 50%);
  box-shadow: inset 0 -2px 4px rgba(0,0,0,0.1);
}

/* ===== 海草动画 ===== */
@keyframes seaweed-sway {
  0%, 100% { transform: rotate(-5deg) scaleY(1); }
  50% { transform: rotate(5deg) scaleY(1.02); }
}

.seaweed {
  position: fixed;
  bottom: 0;
  width: 30px;
  height: 120px;
  background: linear-gradient(180deg, rgba(34,197,94,0.6), rgba(22,163,74,0.8));
  border-radius: 50% 50% 0 0;
  transform-origin: bottom center;
  animation: seaweed-sway 4s ease-in-out infinite;
  z-index: 0;
  opacity: 0.4;
}

.seaweed:nth-child(1) { left: 5%; height: 100px; animation-delay: 0s; }
.seaweed:nth-child(2) { left: 15%; height: 140px; animation-delay: 0.5s; }
.seaweed:nth-child(3) { left: 85%; height: 110px; animation-delay: 1s; }
.seaweed:nth-child(4) { left: 95%; height: 130px; animation-delay: 1.5s; }

/* ===== 导航栏 ===== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(2, 21, 38, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--glass-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.brand .wave { font-size: 1.6rem; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 0.88rem;
  padding: 7px 14px;
  border-radius: 10px;
  color: var(--ocean-200);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  transition: all 0.2s;
  font-weight: 500;
}

.nav-link:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-color: rgba(255,255,255,0.25);
}

.lang-btn {
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: 8px;
  color: var(--ocean-300);
  background: transparent;
  border: 1px solid var(--ocean-600);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}

.lang-btn:hover {
  background: var(--ocean-600);
  color: #fff;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 100px 24px 60px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(ellipse at 50% 100%, rgba(56,189,248,0.2) 0%, transparent 50%),
    radial-gradient(circle at 20% 50%, rgba(103,232,249,0.1) 0%, transparent 30%),
    radial-gradient(circle at 80% 50%, rgba(165,243,252,0.1) 0%, transparent 30%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2.2rem, 7vw, 4rem);
  color: #fff;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 30px rgba(0,0,0,0.4);
  position: relative;
}

.hero p {
  color: var(--ocean-200);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.15rem;
  opacity: 0.9;
  position: relative;
}

/* ===== 波浪分割 ===== */
.wave-divider {
  position: relative;
  height: 80px;
  overflow: hidden;
  margin-top: -1px;
}

.wave-divider svg {
  position: absolute;
  bottom: 0;
  width: 200%;
  height: 80px;
}

/* ===== 容器 ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  position: relative;
  z-index: 1;
}

/* ===== 功能入口 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--ocean-400), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(103,232,249,0.3);
  box-shadow: 0 16px 48px rgba(14,110,153,0.35);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.feature-card h3 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0;
}

/* ===== 课程卡片 ===== */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.course-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ocean-400), var(--ocean-300), var(--ocean-400));
  opacity: 0;
  transition: opacity 0.3s;
}

.course-card:hover {
  transform: translateY(-6px);
  border-color: rgba(103,232,249,0.25);
  box-shadow: 0 12px 40px rgba(14,110,153,0.3);
}

.course-card:hover::before { opacity: 1; }

.course-card .tag {
  align-self: flex-start;
  font-size: 0.72rem;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(56,189,248,0.15);
  color: var(--ocean-300);
  font-weight: 600;
  border: 1px solid rgba(56,189,248,0.2);
}

.course-card h3 {
  font-size: 1.3rem;
  color: #fff;
  font-weight: 700;
}

.course-card .desc {
  color: var(--muted);
  font-size: 0.92rem;
  flex: 1;
  white-space: pre-line;
}

.course-card .meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--ocean-100);
}

.course-card .meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.price {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--ocean-300);
}

.price small {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 400;
}

.slots {
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  color: var(--ocean-200);
  border: 1px solid var(--glass-border);
}

.slots.full {
  background: rgba(248,113,113,0.15);
  color: var(--danger);
  border-color: rgba(248,113,113,0.3);
}

/* ===== 课程联络方式 ===== */
.course-contact {
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.06);
}

.contact-row {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.contact-row a {
  color: var(--ocean-300);
  text-decoration: none;
}

.contact-row a:hover {
  color: var(--ocean-200);
}

.payment-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.82rem;
}

.payment-label {
  color: var(--muted);
  white-space: nowrap;
}

.payment-methods {
  color: var(--ocean-300);
  font-weight: 500;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  padding: 12px 20px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--ocean-500), var(--ocean-400));
  color: #fff;
  box-shadow: 0 4px 16px rgba(20,150,214,0.4);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 24px rgba(20,150,214,0.5);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-outline {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--ocean-200);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.btn-danger {
  background: rgba(248,113,113,0.15);
  color: var(--danger);
  border: 1px solid rgba(248,113,113,0.3);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: 8px;
}

/* ===== 空状态 ===== */
.empty {
  text-align: center;
  color: var(--muted);
  padding: 48px 24px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2,21,38,0.85);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: linear-gradient(145deg, rgba(10,74,99,0.95), rgba(3,34,63,0.98));
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
}

.modal h2, .modal h3 {
  color: #fff;
  margin-bottom: 4px;
}

.modal .sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255,255,255,0.1);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--muted);
  transition: all 0.2s;
}

.modal-close:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ocean-200);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  background: rgba(255,255,255,0.06);
  color: #fff;
  transition: all 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--ocean-400);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.15);
  background: rgba(255,255,255,0.1);
}

.form-group textarea { resize: vertical; min-height: 64px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(10,74,99,0.95);
  backdrop-filter: blur(12px);
  color: #fff;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 200;
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error { background: rgba(220,38,38,0.9); }

/* ===== Footer ===== */
footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 40px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 60px;
  position: relative;
  z-index: 1;
}

/* ===== Admin ===== */
.admin-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  position: relative;
  z-index: 1;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.admin-header h1 { color: #fff; font-size: 1.5rem; }

.tabs {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid rgba(255,255,255,0.08);
  margin-bottom: 20px;
}

.tab {
  padding: 10px 18px;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

.tab:hover { color: var(--ocean-200); }

.tab.active {
  color: var(--ocean-300);
  border-bottom-color: var(--ocean-400);
}

.panel { display: none; }
.panel.active { display: block; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.stat-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 20px;
}

.stat-card .label {
  font-size: 0.8rem;
  color: var(--muted);
}

.stat-card .value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ocean-300);
}

.table-wrap {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
  overflow-x: auto;
}

table { width: 100%; border-collapse: collapse; min-width: 700px; }

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.9rem;
  vertical-align: middle;
}

th {
  background: rgba(255,255,255,0.04);
  color: var(--ocean-200);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tr:hover td { background: rgba(255,255,255,0.03); }

.status-pill {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.status-pending { background: rgba(251,191,36,0.15); color: var(--warn); }
.status-paid { background: rgba(74,222,128,0.15); color: var(--success); }
.status-confirmed { background: rgba(56,189,248,0.15); color: var(--ocean-400); }
.status-cancelled { background: rgba(248,113,113,0.15); color: var(--danger); }
.status-refunded { background: rgba(148,163,184,0.15); color: var(--muted); }

.login-wrap {
  max-width: 400px;
  margin: 80px auto;
  background: linear-gradient(145deg, rgba(10,74,99,0.9), rgba(3,34,63,0.95));
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  padding: 36px;
}

.login-wrap h2 {
  color: #fff;
  margin-bottom: 20px;
  text-align: center;
}

.muted { color: var(--muted); }

.row-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.hidden { display: none !important; }

/* ===== 学员墙 ===== */
#map {
  height: 400px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.1);
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.profile-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 24px;
  transition: all 0.3s;
}

.profile-card:hover {
  border-color: rgba(103,232,249,0.25);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(14,110,153,0.25);
}

.profile-card h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 6px;
}

.profile-card .loc {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.profile-card .cert {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(56,189,248,0.15);
  color: var(--ocean-300);
  display: inline-block;
  margin-bottom: 8px;
  border: 1px solid rgba(56,189,248,0.2);
}

.profile-card .bio {
  color: var(--ocean-100);
  font-size: 0.88rem;
  white-space: pre-line;
  opacity: 0.85;
}

/* ===== 学员档案 ===== */
.tab-bar {
  display: flex;
  gap: 2px;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}

.tab-btn {
  flex: 1;
  padding: 10px 6px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--ocean-500);
  color: #fff;
}

.section { display: none; }
.section.active { display: block; }

.stat-card .stat-val {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ocean-300);
}

.stat-card .stat-lbl {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 4px;
}

.pb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.pb-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 16px;
  text-align: center;
  transition: all 0.2s;
}

.pb-card:hover {
  border-color: rgba(103,232,249,0.25);
}

.pb-disc {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ocean-400);
  margin-bottom: 4px;
}

.pb-val {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
}

.pb-date {
  font-size: 0.68rem;
  color: var(--muted);
  margin-top: 2px;
}

.log-item {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 18px;
  margin-bottom: 12px;
}

.log-date {
  font-weight: 700;
  color: var(--ocean-300);
}

.log-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.review-chart {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 24px;
  margin-bottom: 16px;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.bar-label {
  width: 60px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: right;
}

.bar-track {
  flex: 1;
  height: 22px;
  background: rgba(255,255,255,0.06);
  border-radius: 11px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ocean-500), var(--ocean-400));
  border-radius: 11px;
  transition: width 0.6s ease;
}

.bar-val {
  width: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ocean-200);
}

/* ===== 课程日历 ===== */
.cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.cal-nav {
  display: flex;
  gap: 8px;
}

.cal-nav button {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: var(--ocean-200);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.cal-nav button:hover {
  background: var(--ocean-500);
  color: #fff;
  border-color: var(--ocean-500);
}

.view-toggle {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 3px;
  border: 1px solid rgba(255,255,255,0.1);
}

.view-btn {
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  background: transparent;
  color: var(--muted);
  transition: all 0.2s;
}

.view-btn.active {
  background: var(--ocean-500);
  color: #fff;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  position: relative;
  z-index: 1;
}

.cal-head {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ocean-300);
  padding: 8px 0;
}

.cal-day {
  min-height: 80px;
  border-radius: 10px;
  padding: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.03);
}

.cal-day:hover {
  border-color: rgba(103,232,249,0.25);
  background: rgba(255,255,255,0.06);
}

.cal-day.today {
  border: 2px solid var(--ocean-400);
  background: rgba(56,189,248,0.08);
}

.cal-day.other-month { opacity: 0.25; }

.cal-day .day-num {
  font-weight: 600;
  color: var(--ocean-100);
  margin-bottom: 4px;
}

.cal-event {
  font-size: 0.62rem;
  padding: 2px 6px;
  border-radius: 4px;
  margin-bottom: 2px;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cal-event.course1 { background: var(--ocean-500); }
.cal-event.course2 { background: #0ea5e9; }
.cal-event.course3 { background: #06b6d4; }

.week-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  gap: 1px;
  position: relative;
  z-index: 1;
}

.week-header {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ocean-300);
  padding: 8px 0;
}

.week-time {
  font-size: 0.7rem;
  color: var(--muted);
  padding: 4px 0;
  text-align: right;
}

.week-slot {
  min-height: 40px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
  padding: 2px;
  font-size: 0.65rem;
  cursor: pointer;
  transition: background 0.2s;
}

.week-slot:hover { background: rgba(56,189,248,0.08); }

.day-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.day-event {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(16px);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 18px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.day-event .time {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ocean-300);
  min-width: 50px;
}

.day-event .info { flex: 1; }

.day-event .title {
  font-weight: 600;
  color: #fff;
}

.day-event .meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

/* ===== 学员档案 header ===== */
.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
}

.profile-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ocean-500), var(--ocean-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(20,150,214,0.4);
}

.profile-name { margin: 0; color: #fff; }
.profile-email { margin: 4px 0 0; color: var(--muted); font-size: 0.85rem; }

/* ===== 响应式 ===== */
@media (max-width: 640px) {
  .hero { padding: 60px 16px 30px; }
  .container { padding: 16px; }
  .modal { padding: 24px; }
  .table-wrap { min-width: 100%; }
  .cal-day { min-height: 60px; padding: 4px; font-size: 0.7rem; }
  .week-grid { grid-template-columns: 40px repeat(7, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}