/* ============================================
   北京师范大学亚太实验学校
   2026届九年级六班毕业纪念册
   Design: Warm Gold + Deep Navy + Cream
   Mobile-first: 375-768px primary, 768px+ desktop
   ============================================ */

/* ============ CSS Variables ============ */
:root {
  --gold: #C9A96E;
  --gold-dark: #A6853A;
  --gold-light: #E8D5B0;
  --gold-50: rgba(201,169,110,0.08);
  --gold-100: rgba(201,169,110,0.12);
  --gold-200: rgba(201,169,110,0.22);
  --gold-300: rgba(201,169,110,0.35);
  --navy: #1A1F3D;
  --navy-light: #2D3561;
  --navy-dark: #0F1225;
  --navy-50: rgba(26,31,61,0.04);
  --cream: #FDF8F0;
  --cream-dark: #F5EDDF;
  --white: #FFFFFF;
  --gray-100: #F7F5F2;
  --gray-200: #E8E4DE;
  --gray-300: #C5BFB5;
  --gray-400: #9E9688;
  --gray-500: #6B6358;
  --gray-600: #4A443C;
  --red: #E74C3C;
  --green: #27AE60;
  --blue: #3498DB;

  --font-display: 'ZCOOL XiaoWei', serif;
  --font-body: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-emoji: 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji', sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-gold: 0 2px 12px rgba(201,169,110,0.25);

  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);

  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ============ Reset ============ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--navy);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* ============ SVG Tab Icon ============ */
.tab-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ============ Page ============ */
.page {
  display: none;
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
}

.page.active {
  display: flex;
  animation: pageIn 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Welcome Page
   ============================================ */
#page-welcome {
  flex-direction: column;
  background:
    radial-gradient(ellipse at 22% 50%, rgba(201,169,110,0.10) 0%, transparent 58%),
    radial-gradient(ellipse at 78% 28%, rgba(26,31,61,0.05) 0%, transparent 58%),
    var(--cream);
  text-align: center;
  overflow: hidden;
}

/* ============================================
   Book Cover Welcome Page (超精致书封面)
   ============================================ */
.book-cover {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(165deg, #FDF8F0 0%, #F5EDE0 100%);
}

.book-cover-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('images/welcome-bg-mobile.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: brightness(1.02) saturate(0.9);
}

@media (min-aspect-ratio: 4/3) {
  .book-cover-bg {
    background-image: url('images/welcome-bg-desktop.jpg');
  }
}

.book-cover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(253,248,240,0.25) 0%,
    rgba(253,248,240,0.08) 25%,
    rgba(253,248,240,0.03) 45%,
    rgba(253,248,240,0.12) 65%,
    rgba(253,248,240,0.45) 100%
  );
}

/* 书脊效果 - 更精致 */
.book-spine {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 14px;
  background: linear-gradient(90deg,
    rgba(201,169,110,0.35) 0%,
    rgba(201,169,110,0.15) 30%,
    rgba(201,169,110,0.05) 70%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 60px 0;
}

.spine-line {
  width: 2px;
  height: 50px;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(201,169,110,0.25) 15%,
    rgba(201,169,110,0.45) 50%,
    rgba(201,169,110,0.25) 85%,
    transparent 100%
  );
}

/* 书内容区域 */
.book-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 360px;
  padding: 12px 32px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  justify-content: center;
  gap: 6px;
}

/* 装饰线 */
.book-ornament {
  color: var(--gold);
  opacity: 0.5;
}

.book-ornament svg {
  display: block;
  margin: 0 auto;
}

/* 年份 - 更精致 */
.book-year {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--gold-dark);
  letter-spacing: 0.25em;
  margin-top: 8px;
  margin-bottom: 16px;
  padding: 4px 10px;
  border: 1px solid var(--gold-200);
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.6);
  cursor: pointer;
  user-select: none;
  transition: all 0.3s ease;
  display: inline-block;
}

.book-year:hover {
  border-color: var(--gold);
  background: rgba(255,255,255,0.85);
}

/* 标题区域 */
.book-title-area {
  margin-bottom: 16px;
  position: relative;
}

.book-school {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: 0.1em;
  margin-bottom: 2px;
  font-weight: 400;
}

.book-school-sub {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--navy-light);
  line-height: 1.3;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
  font-weight: 400;
}

.book-divider {
  color: var(--gold);
  margin-bottom: 8px;
  opacity: 0.7;
}

.book-divider svg {
  display: block;
  margin: 0 auto;
}

.book-subtitle {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-bottom: 4px;
  font-weight: 400;
}

.book-class {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--gray-500);
  letter-spacing: 0.12em;
}

/* 格言 */
.book-motto {
  margin-bottom: 12px;
  padding: 10px 20px;
  border-left: 2px solid var(--gold-200);
  border-right: 2px solid var(--gold-200);
  position: relative;
}

.book-motto::before,
.book-motto::after {
  content: '';
  position: absolute;
  left: 30%;
  right: 30%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-200), transparent);
}

.book-motto::before { top: 0; }
.book-motto::after { bottom: 0; }

.book-motto p {
  font-family: var(--font-display);
  font-size: 0.88rem;
  color: var(--navy-light);
  letter-spacing: 0.1em;
  line-height: 1.9;
}

.book-motto-small {
  font-size: 0.75rem !important;
  color: var(--gray-400) !important;
  letter-spacing: 0.06em !important;
  margin-top: 4px;
}

/* 按钮 */
.book-actions {
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: 14px;
  width: 100%;
  max-width: 320px;
  margin-bottom: 36px;
}

.book-btn {
  width: 100%;
  padding: 15px 24px;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  letter-spacing: 0.06em;
  position: relative;
  overflow: hidden;
}

.book-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.book-btn:hover::before {
  transform: translateX(100%);
}

.book-btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  box-shadow: 0 4px 20px rgba(201,169,110,0.35);
}

.book-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(201,169,110,0.45);
}

.book-btn-primary:active {
  transform: translateY(0);
}

.book-btn-secondary {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  color: var(--navy);
  border: 1.5px solid var(--gold-200);
}

.book-btn-secondary:hover {
  border-color: var(--gold);
  background: rgba(255,255,255,0.95);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(201,169,110,0.18);
}

.book-btn-secondary:active {
  transform: translateY(0);
}

/* 底部 */
.book-footer {
  padding-top: 4px;
}

.book-credit {
  font-size: 0.6rem;
  color: var(--gray-400);
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* Override for btn-role IDs */
#btn-role-student {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  box-shadow: 0 4px 20px rgba(201,169,110,0.35);
}

#btn-role-student:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(201,169,110,0.45);
}

#btn-role-teacher {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  color: var(--navy);
  border: 1.5px solid var(--gold-200);
}

#btn-role-teacher:hover {
  border-color: var(--gold);
  background: rgba(255,255,255,0.95);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(201,169,110,0.18);
}

/* ============================================
   Main Page
   ============================================ */
#page-main {
  flex-direction: column;
  background: var(--cream);
  padding-bottom: calc(64px + var(--safe-bottom));
}

/* Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253,248,240,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--gold-100);
  padding: 0 16px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.header-logo-frame {
  display: inline-flex;
  align-items: center;
  width: 104px;
  height: 34px;
  padding: 3px 5px;
  flex: 0 0 auto;
  border: 1px solid var(--gold-300);
  border-radius: 10px;
  background: #0a0e1a;
  box-shadow: var(--shadow-sm);
}

.header-logo-frame img { display: block; width: 100%; height: 100%; object-fit: contain; }

.header-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--gold);
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.user-greeting {
  font-size: 0.76rem;
  color: var(--gray-500);
  white-space: nowrap;
}

#btn-edit-profile, #btn-logout {
  padding: 5px 10px;
  font-size: 0.76rem;
}

/* Body */
.main-body {
  flex: 1;
  padding: 8px 16px 16px;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
}

/* Stats Bar */
.stats-bar-inline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 8px 0 6px;
  font-size: 0.8rem;
  color: var(--gray-500);
}

.stat-number {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.92rem;
}

.stat-label {
  color: var(--gray-400);
  font-size: 0.76rem;
}

/* Desktop Tabs */
.main-tabs {
  display: none;
  gap: 4px;
  padding: 6px 0 10px;
  border-bottom: 1px solid var(--gray-100);
  margin-bottom: 10px;
}

.main-tab {
  flex: 1;
  padding: 7px 10px;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.84rem;
  color: var(--gray-500);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  text-align: center;
}

.main-tab.active {
  color: var(--gold-dark);
  background: var(--gold-50);
  font-weight: 600;
}

/* Panels */
.main-panel {
  display: none;
}

.main-panel.active {
  display: block;
}

/* ============================================
   Classmates Panel
   ============================================ */
#panel-classmates {
  display: none;
}

#panel-classmates.active {
  display: block;
}

.classmates-search-bar {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--gold-200);
  border-radius: var(--radius-pill);
  padding: 0 14px;
  margin-bottom: 10px;
  transition: all var(--transition);
}

.classmates-search-bar:focus-within {
  border-color: var(--gold);
  background: var(--white);
  box-shadow: 0 0 0 3px var(--gold-50);
}

.search-icon {
  color: var(--gray-400);
  flex-shrink: 0;
  margin-right: 6px;
}

.search-icon .tab-icon {
  width: 16px;
  height: 16px;
}

#classmates-search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 0;
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  outline: none;
  box-shadow: none;
  min-width: 0;
}

#classmates-search-input::placeholder {
  color: var(--gray-400);
}

#search-clear-btn {
  border: none;
  background: transparent;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
  border-radius: 50%;
  transition: all var(--transition);
}

#search-clear-btn:hover {
  color: var(--gray-600);
  background: var(--gray-100);
}

#search-clear-btn .tab-icon {
  width: 14px;
  height: 14px;
}

.classmates-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.classmate-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--white);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.classmate-card:active {
  background: var(--cream-dark);
  transform: scale(0.985);
}

.classmate-card:hover {
  border-color: var(--gold-100);
  box-shadow: var(--shadow-sm);
}

.classmate-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
}

.classmate-avatar img,
.moment-avatar img,
.detail-avatar img,
.userpage-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.classmate-info {
  flex: 1;
  min-width: 0;
}

.classmate-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy);
  line-height: 1.3;
}

.teacher-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--gold-dark);
  background: var(--gold-50);
  border: 1px solid var(--gold-200);
  border-radius: var(--radius-pill);
  padding: 0 6px;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1.6;
}

.classmate-signature {
  font-size: 0.78rem;
  color: var(--gray-400);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

.classmate-meta {
  font-size: 0.72rem;
  color: var(--gray-400);
  flex-shrink: 0;
  text-align: right;
  line-height: 1.5;
}

.classmate-hobbies {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

.classmate-hobby {
  font-size: 0.7rem;
  color: var(--gold-dark);
  background: var(--gold-50);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.classmates-search-empty {
  text-align: center;
  padding: 36px 20px;
  color: var(--gray-400);
  font-size: 0.88rem;
}

.search-empty-icon {
  display: block;
  margin: 0 auto 8px;
  opacity: 0.4;
}

.search-empty-icon .tab-icon {
  width: 36px;
  height: 36px;
}

/* ============================================
   Chat Panel
   ============================================ */
#panel-chat {
  display: none;
}

#panel-chat.active {
  display: flex;
  flex-direction: column;
}

.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - 52px - 8px - 56px - var(--safe-bottom, 0px));
  max-height: calc(100dvh - 52px - 8px - 56px - var(--safe-bottom, 0px));
  min-height: 320px;
  position: relative;
}

/* 聊天背景水印 */
.chat-watermark {
  position: absolute;
  top: 45%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-20deg);
  font-size: 13px;
  color: rgba(0, 0, 0, 0.05);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  z-index: 0;
  letter-spacing: 3px;
  font-weight: 300;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 10px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  -webkit-overflow-scrolling: touch;
  position: relative;
  z-index: 1;
}

/* Message */
.chat-message {
  display: flex;
  gap: 8px;
  max-width: 88%;
  animation: msgIn 0.3s ease;
}

.chat-message.self {
  flex-direction: row-reverse;
  align-self: flex-end;
}

.chat-message.new {
  animation: msgIn 0.45s ease;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message-avatar {
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
}

.chat-message-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.chat-message-content {
  min-width: 0;
  max-width: 100%;
}

.chat-message-header {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 3px;
}

.chat-message.self .chat-message-header {
  flex-direction: row-reverse;
}

.chat-message-name {
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--gray-500);
}

.chat-message-time {
  font-size: 0.68rem;
  color: var(--gray-400);
}

.chat-message-body {
  padding: 8px 12px;
  border-radius: 14px;
  font-size: 0.86rem;
  line-height: 1.55;
  word-break: break-word;
  position: relative;
}

.chat-message:not(.self) .chat-message-body {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-top-left-radius: 4px;
  color: var(--navy);
}

.chat-message.self .chat-message-body {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  border-top-right-radius: 4px;
}

.chat-message-actions {
  display: flex;
  gap: 4px;
  margin-top: 3px;
}

/* Quote & Reedit */
.chat-quote-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: var(--gold-50);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: var(--gray-600);
}

.chat-reedit-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--gold-50);
  border-radius: var(--radius-sm);
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--gray-500);
}

/* Input Area */
.chat-input-area {
  flex-shrink: 0;
  padding-top: 8px;
  border-top: 1px solid var(--gray-100);
  position: relative;
  z-index: 1;
}

.chat-input-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-input-row .chat-toolbar-btn {
  flex-shrink: 0;
}

.chat-input-row .chat-input {
  flex: 1;
  min-width: 0;
}

.chat-input-row .chat-send-btn {
  flex-shrink: 0;
}

.chat-toolbar-btn {
  border: none;
  background: transparent;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-500);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-toolbar-btn:hover {
  background: var(--gold-50);
  color: var(--gold-dark);
}

.chat-image-msg {
  max-width: 200px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.chat-image-msg img {
  width: 100%;
  border-radius: var(--radius-sm);
}

.chat-video-msg {
  max-width: 240px;
  border-radius: var(--radius-sm);
}

.chat-video-msg video {
  width: 100%;
  border-radius: var(--radius-sm);
}

.chat-withdrawn {
  font-style: italic;
  color: var(--gray-400);
  font-size: 0.8rem;
  text-align: center;
  padding: 4px 0;
}

#chat-input {
  flex: 1;
  padding: 8px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  background: var(--white);
  outline: none;
  transition: all var(--transition);
  min-width: 0;
}

#chat-input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-50);
}

#chat-input::placeholder {
  color: var(--gray-400);
}

#chat-send-btn {
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  padding: 8px 18px;
}

#emoji-btn {
  cursor: pointer;
}

#chat-input-file, #chat-input-video {
  display: inline-flex;
}

#quote-preview {
  margin-bottom: 6px;
}

#reedit-bar {
  margin-bottom: 6px;
}

/* 聊天室上传预览 */
.chat-upload-preview {
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 6px;
  background: rgba(245, 243, 240, 0.8);
  border-radius: 12px;
  max-height: 200px;
  overflow-y: auto;
}

.upload-preview-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  background: #fff;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,0.06);
  transition: opacity 0.3s ease;
}

.upload-preview-item.upload-preview-done {
  opacity: 0;
}

.upload-preview-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  background: #f0eeeb;
}

.upload-preview-thumb img,
.upload-preview-thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-preview-badge {
  position: absolute;
  bottom: 2px;
  right: 2px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 10px;
  padding: 1px 4px;
  border-radius: 4px;
}

.upload-preview-info {
  flex: 1;
  min-width: 0;
}

.upload-preview-name {
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.upload-preview-size {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.upload-preview-progress {
  width: 100%;
  height: 4px;
  background: #e8e4df;
  border-radius: 2px;
  margin-top: 6px;
  overflow: hidden;
}

.upload-preview-bar {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.upload-preview-cancel {
  width: 24px;
  height: 24px;
  border: none;
  background: rgba(0,0,0,0.08);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.upload-preview-cancel:hover {
  background: rgba(0,0,0,0.15);
  color: var(--text-primary);
}

/* ============================================
   Moments Panel
   ============================================ */
#panel-moments {
  display: none;
}

#panel-moments.active {
  display: block;
}

/* Composer */
.moments-composer {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--gray-100);
  margin-bottom: 12px;
}

#moments-content {
  width: 100%;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  resize: none;
  outline: none;
  line-height: 1.55;
  min-height: 42px;
}

#moments-content::placeholder {
  color: var(--gray-400);
}

.moments-composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}

.moments-composer-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

#moments-image-btn, #moments-video-btn, #moments-visibility-btn {
  border: none;
  background: transparent;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-500);
}

#moments-image-btn:hover,
#moments-video-btn:hover,
#moments-visibility-btn:hover {
  background: var(--gold-50);
  color: var(--gold-dark);
}

#moments-publish-btn {
  border-radius: var(--radius-pill);
  padding: 7px 16px;
  font-size: 0.82rem;
}

.moments-images-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

.moments-images-preview img,
.moments-images-preview video {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

/* Feed */
.moments-feed {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Moment Card */
.moment-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.moment-card:active {
  background: var(--cream-dark);
}

.moment-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.moment-avatar {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy-light), var(--navy));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
}

.moment-author {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--navy);
  line-height: 1.3;
}

.moment-time {
  font-size: 0.72rem;
  color: var(--gray-400);
}

.moment-visibility-badge {
  font-size: 0.68rem;
  color: var(--gold-dark);
  background: var(--gold-50);
  border-radius: var(--radius-pill);
  padding: 1px 8px;
  margin-left: auto;
  flex-shrink: 0;
}

.moment-content {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--navy);
  margin-bottom: 10px;
  white-space: pre-wrap;
  word-break: break-word;
}

.moment-images,
.moment-media-grid {
  display: grid;
  gap: 4px;
  margin-bottom: 10px;
}

/* 1张图：大图展示 */
.moment-media-grid.grid-1 {
  grid-template-columns: 1fr;
  max-width: 240px;
}
.moment-media-grid.grid-1 img,
.moment-media-grid.grid-1 video {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  width: 100%;
}

/* 2张图：左右并排 */
.moment-media-grid.grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 320px;
}

/* 3张图：一排3个 */
.moment-media-grid.grid-3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 320px;
}

/* 4张图：2x2 */
.moment-media-grid.grid-4 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 320px;
}

/* 5-6张图：2行3列 */
.moment-media-grid.grid-6 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 320px;
}

/* 7-9张图：3x3 */
.moment-media-grid.grid-9 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 320px;
}

.moment-media-grid img,
.moment-media-grid video {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: block;
}

.moment-image {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.moment-actions {
  display: flex;
  gap: 14px;
  padding-top: 8px;
  border-top: 1px solid var(--gray-100);
}

.moment-actions .btn-ghost {
  font-size: 0.78rem;
  color: var(--gray-500);
  padding: 4px 0;
}

.moment-likes {
  font-size: 0.8rem;
  color: var(--gray-600);
  padding: 6px 0 2px;
}

.moment-comments {
  padding: 6px 0 0;
  border-top: 1px solid var(--gray-100);
  margin-top: 4px;
}

/* 评论区域 */
.moment-comments-section {
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  margin-top: 8px;
}

.moment-comments-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.moment-comment {
  font-size: 0.8rem;
  color: var(--navy);
  padding: 2px 0;
  line-height: 1.5;
}

.moment-comment strong {
  color: var(--gold-dark);
  font-weight: 600;
  margin-right: 4px;
}

.moment-expand-btn {
  text-align: right;
  font-size: 0.75rem;
  color: var(--gold-dark);
  cursor: pointer;
  padding: 2px 0;
  user-select: none;
}

.moment-expand-btn:hover {
  color: var(--gold);
}

/* 操作按钮样式 */
.moment-actions {
  display: flex;
  gap: 16px;
  padding-top: 10px;
  margin-top: 8px;
  border-top: 1px solid var(--gray-100);
}

.moment-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-pill);
  background: var(--white);
  color: var(--gray-600);
  font-size: 0.78rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}

.moment-action-btn:hover {
  border-color: var(--gold-200);
  color: var(--gold-dark);
  background: var(--gold-50);
}

.moment-action-btn:active {
  transform: scale(0.96);
}

.moment-action-btn svg {
  flex-shrink: 0;
}

/* 评论输入框 */
.moment-comment-input-box {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--gray-100);
}

.moment-comment-input-field {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.82rem;
  outline: none;
  transition: all var(--transition);
  background: var(--gray-50);
}

.moment-comment-input-field:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 2px var(--gold-50);
  background: var(--white);
}

.moment-comment-send-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition);
}

.moment-comment-send-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 2px 8px rgba(201,169,110,0.4);
}

.moment-comment-send-btn:active {
  transform: scale(0.95);
}

/* 朋友圈删除按钮 */
.moment-delete-btn {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--gray-400);
  font-size: 0.72rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  margin-left: auto;
}

.moment-delete-btn:hover {
  color: var(--red);
  background: rgba(231,76,60,0.08);
}

/* ============================================
   Letters Panel
   ============================================ */
#panel-letters {
  display: none;
}

#panel-letters.active {
  display: block;
}

/* Compose */
.letters-compose {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--gray-100);
  margin-bottom: 10px;
}

.letters-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 10px;
}

.letters-field {
  margin-bottom: 10px;
}

/* Recipient Search */
.recipient-search-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--gold-200);
  border-radius: var(--radius-pill);
  padding: 0 14px;
  transition: all var(--transition);
}

.recipient-search-bar:focus-within {
  border-color: var(--gold);
  background: var(--white);
  box-shadow: 0 0 0 3px var(--gold-50);
}

#letter-recipient-search {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 0;
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  outline: none;
  box-shadow: none;
  min-width: 0;
}

#letter-recipient-search::placeholder {
  color: var(--gray-400);
}

.recipient-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  max-height: 180px;
  overflow-y: auto;
  z-index: 50;
  display: none;
}

.recipient-dropdown:not(:empty) {
  display: block;
}

.recipient-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  cursor: pointer;
  font-size: 0.86rem;
  color: var(--navy);
  transition: background var(--transition);
}

.recipient-dropdown-item:hover {
  background: var(--gold-50);
}

.recipient-avatar {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
}

#letter-recipient-id {
  display: none;
}

#letter-content {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  resize: vertical;
  min-height: 70px;
  line-height: 1.6;
  outline: none;
  transition: all var(--transition);
}

#letter-content:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-50);
}

#letter-content::placeholder {
  color: var(--gray-400);
}

#letter-send-btn {
  width: 100%;
  margin-top: 4px;
}

/* Mailboxes (collapsible) */
.letters-mailboxes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mailbox-section {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-100);
  overflow: hidden;
}

.mailbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  cursor: pointer;
  transition: background var(--transition);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy);
}

.mailbox-header:hover {
  background: var(--gold-50);
}

.mailbox-header.collapsed .mailbox-chevron {
  transform: rotate(-90deg);
}

.mailbox-chevron {
  transition: transform var(--transition);
  color: var(--gray-400);
}

.mailbox-chevron .tab-icon {
  width: 14px;
  height: 14px;
}

.mailbox-body {
  border-top: 1px solid var(--gray-100);
  max-height: 240px;
  overflow-y: auto;
}

.mailbox-header.collapsed + .mailbox-body {
  display: none;
}

.letters-list {
  padding: 0;
}

.letters-empty {
  text-align: center;
  padding: 20px 16px;
  color: var(--gray-400);
  font-size: 0.82rem;
}

.letter-item {
  padding: 10px 14px;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: background var(--transition);
}

.letter-item:last-child {
  border-bottom: none;
}

.letter-item:hover {
  background: var(--gold-50);
}

.letter-item .letter-from {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gold-dark);
  margin-bottom: 2px;
}

.letter-item .letter-content {
  font-size: 0.84rem;
  color: var(--navy);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.letter-item .letter-time {
  font-size: 0.7rem;
  color: var(--gray-400);
  margin-top: 4px;
}

#mailbox-inbox .mailbox-count,
#mailbox-sent .mailbox-count,
#inbox-count,
#sent-count {
  font-size: 0.72rem;
  color: var(--white);
  background: var(--gold);
  border-radius: var(--radius-pill);
  padding: 1px 7px;
  min-width: 18px;
  text-align: center;
  line-height: 1.6;
}

/* ============================================
   Modal System
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal.show {
  display: flex;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 16px;
  padding-top: 5vh;
  background: rgba(15,18,37,0.48);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow-y: auto;
}

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

@keyframes overlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-container,
.modal-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.modal-card-lg {
  max-width: 520px;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  margin-bottom: 16px;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--navy);
}

.modal-body {
  font-size: 0.88rem;
  color: var(--navy);
  line-height: 1.6;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border: none;
  background: var(--gray-100);
  color: var(--gray-500);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 5;
}

.modal-close:hover {
  background: var(--gray-200);
  color: var(--navy);
}

.btn-close-modal {
  padding: 4px 10px;
}

/* Specific modals */
#auth-modal .modal-container,
#auth-modal .modal-card { max-width: 400px; }
#profile-modal .modal-container,
#profile-modal .modal-card { max-width: 460px; }
#userpage-modal .modal-container,
#userpage-modal .modal-card { max-width: 420px; }
#detail-modal .modal-container,
#detail-modal .modal-card { max-width: 420px; }
#inbox-modal .modal-container,
#inbox-modal .modal-card { max-width: 440px; }
#agreement-modal .modal-container,
#agreement-modal .modal-card { max-width: 440px; }
#moments-visibility-modal .modal-container,
#moments-visibility-modal .modal-card { max-width: 400px; }
#media-preview-modal .modal-container,
#media-preview-modal .modal-card {
  max-width: 95vw;
  max-height: 95vh;
  background: transparent;
  padding: 0;
  box-shadow: none;
}

#media-preview-modal .modal-overlay {
  background: rgba(0,0,0,0.92);
}

/* ============================================
   Auth / Login / Register
   ============================================ */
.auth-tabs {
  display: flex;
  position: relative;
  margin-bottom: 20px;
  border-bottom: 1.5px solid var(--gray-200);
}

.auth-tab {
  flex: 1;
  padding: 10px 0;
  background: none;
  border: none;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--gray-400);
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
}

.auth-tab.active {
  color: var(--gold-dark);
}

.auth-tab-indicator {
  position: absolute;
  bottom: -1.5px;
  left: 0;
  width: 50%;
  height: 2px;
  background: var(--gold);
  transition: transform var(--transition);
  border-radius: 2px;
}

.auth-panel {
  display: none;
}

.auth-panel.active {
  display: block;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.form-switch {
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 8px;
}

.btn-link {
  background: none;
  border: none;
  color: var(--gold-dark);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: underline;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: 14px;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 5px;
}

.form-input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--navy);
  background: var(--white);
  transition: all var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-50);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-textarea {
  resize: vertical;
  min-height: 56px;
  line-height: 1.55;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%239E9688'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}

.form-note {
  font-size: 0.76rem;
  color: var(--gray-400);
  margin-top: 4px;
  line-height: 1.5;
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.965);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--white);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  box-shadow: 0 4px 18px rgba(201,169,110,0.35);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.965) translateY(0);
}

.btn-secondary {
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--gold-200);
}

.btn-secondary:hover {
  border-color: var(--gold);
  background: var(--gold-50);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-500);
  padding: 5px 10px;
}

.btn-ghost:hover {
  color: var(--navy);
  background: var(--gold-50);
}

.btn-sm {
  font-size: 0.78rem;
  padding: 5px 12px;
}

.btn-icon {
  font-size: 1rem;
  padding: 6px;
}

.btn-danger {
  background: rgba(231,76,60,0.1);
  color: var(--red);
}

.btn-danger:hover {
  background: var(--red);
  color: var(--white);
}

.btn-loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 6px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   Notifications & Toast
   ============================================ */
#dynamic-island {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%) translateY(-120px);
  z-index: 10000;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-pill);
  min-width: 80px;
  max-width: 380px;
  overflow: hidden;
  transition: all 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 6px 28px rgba(0,0,0,0.22);
}

#dynamic-island.show {
  transform: translateX(-50%) translateY(0);
}

.island-content {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  white-space: nowrap;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
}

#custom-toast {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%) translateY(-16px);
  z-index: 9999;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  max-width: 360px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
  font-size: 0.84rem;
}

#custom-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ============================================
   Emoji Picker
   ============================================ */
#emoji-picker {
  position: fixed;
  bottom: calc(60px + var(--safe-bottom) + 8px);
  left: 12px;
  right: 12px;
  z-index: 6000;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  max-height: 280px;
  display: none;
}

#emoji-picker.show {
  display: block;
  animation: slideUp 0.28s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.emoji-category {
  border: none;
  background: var(--gray-100);
  font-size: 1rem;
  padding: 5px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.emoji-category.active {
  background: var(--gold-50);
  border: 1px solid var(--gold-200);
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  max-height: 180px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.emoji-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  font-size: 1.2rem;
  font-family: var(--font-emoji);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.emoji-item:hover {
  background: var(--gold-50);
  transform: scale(1.15);
}

/* 不支持emoji的降级样式 */
.emoji-item.emoji-fallback {
  font-size: 0.55rem;
  font-family: var(--font-body);
  color: var(--gray-500);
  line-height: 1.1;
  text-align: center;
  padding: 2px;
  word-break: break-all;
}

/* ============================================
   Context Menu
   ============================================ */
#msg-context-menu {
  position: fixed;
  z-index: 7000;
  background: var(--white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px;
  min-width: 120px;
  display: none;
}

#msg-context-menu.show {
  display: block;
}

/* ============================================
   Particle Canvas
   ============================================ */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   Mobile Bottom Nav
   ============================================ */
.mobile-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: space-around;
  background: rgba(253,248,240,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--gold-100);
  height: calc(56px + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  border: none;
  background: transparent;
  color: var(--gray-400);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  min-width: 52px;
}

.mobile-nav-item.active {
  color: var(--gold);
}

.mobile-nav-item:active {
  background: var(--gold-50);
}

.mobile-nav-icon .tab-icon {
  width: 22px;
  height: 22px;
}

.mobile-nav-label {
  font-size: 0.66rem;
  font-weight: 600;
}

/* ============================================
   Footer
   ============================================ */
.main-footer {
  text-align: center;
  padding: 14px 16px;
  font-size: 0.72rem;
  color: var(--gray-400);
  letter-spacing: 0.04em;
  border-top: 1px solid var(--gray-100);
  margin-top: 6px;
}

/* ============================================
   Admin Page
   ============================================ */
#page-admin {
  flex-direction: column;
  background: var(--cream);
}

/* ============================================
   Detail Modal (同学详情)
   ============================================ */
.detail-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--white);
  margin: 0 auto 12px;
  box-shadow: 0 4px 12px rgba(201,169,110,0.3);
  overflow: hidden;
}

.detail-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--navy);
  text-align: center;
  margin-bottom: 4px;
}

.detail-role-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--gold-50);
  color: var(--gold-dark);
  margin: 0 auto 12px;
}

.detail-info {
  margin-top: 12px;
}

.detail-info-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.85rem;
}

.detail-info-item .label {
  color: var(--gray-500);
  flex-shrink: 0;
}

.detail-info-item .value {
  color: var(--navy);
  text-align: right;
  word-break: break-all;
}

.detail-hobbies {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.detail-hobby {
  padding: 3px 10px;
  background: var(--gold-50);
  color: var(--gold-dark);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
}

/* ============================================
   Userpage Modal (用户主页)
   ============================================ */
.userpage-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--white);
  margin: 0 auto 12px;
  box-shadow: 0 4px 16px rgba(201,169,110,0.35);
  overflow: hidden;
}

.userpage-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--navy);
  text-align: center;
  margin-bottom: 4px;
}

.userpage-info {
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 12px;
}

/* ============================================
   Admin Panel (后台管理)
   ============================================ */
.admin-header {
  padding: 16px 20px;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--navy);
}

.admin-body {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.admin-stat-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
  border: 1px solid var(--gray-100);
}

.admin-stat-number {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--gold-dark);
  font-weight: 700;
}

.admin-stat-label {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 2px;
}

.admin-sections {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.admin-section {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--gray-100);
}

.admin-section-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gray-100);
}

.admin-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.admin-table th {
  background: var(--cream);
  padding: 8px 10px;
  text-align: left;
  font-weight: 600;
  color: var(--navy);
  border-bottom: 2px solid var(--gold-100);
  white-space: nowrap;
}

.admin-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-600);
  vertical-align: middle;
}

.admin-table tr:hover td {
  background: var(--gold-50);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--gold);
  color: var(--gold-dark);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-outline:hover {
  background: var(--gold);
  color: var(--white);
}

/* ============================================
   Media Preview (媒体预览)
   ============================================ */
.media-preview-container {
  position: relative;
  max-width: 95vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-preview-container img,
.media-preview-container video {
  max-width: 95vw;
  max-height: 85vh;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.media-preview-close {
  position: absolute;
  top: -36px;
  right: 0;
  background: rgba(255,255,255,0.2);
  border: none;
  color: var(--white);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* ============================================
   Visibility Settings (可见性设置)
   ============================================ */
.visibility-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.visibility-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition);
}

.visibility-option:hover {
  border-color: var(--gold-200);
}

.visibility-option.selected {
  border-color: var(--gold);
  background: var(--gold-50);
}

.visibility-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy);
}

.visibility-desc {
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-top: 2px;
}

.visibility-users {
  max-height: 150px;
  overflow-y: auto;
  margin-top: 8px;
  padding: 8px;
  background: var(--cream);
  border-radius: var(--radius-sm);
}

.visibility-user-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.visibility-hint {
  font-size: 0.75rem;
  color: var(--gray-400);
  text-align: center;
  padding: 8px;
}

.visibility-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 14px;
}

/* ============================================
   Modal header row (标题+按钮并行)
   ============================================ */
.modal-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.modal-header-row .modal-title {
  margin-bottom: 0;
}

.btn-sm {
  padding: 4px 12px;
  font-size: 0.78rem;
}

/* ============================================
   Profile Modal extras (个人信息弹窗补充)
   ============================================ */
.modal-desc {
  font-size: 0.82rem;
  color: var(--gray-500);
  text-align: center;
  margin-bottom: 16px;
}

.modal-tip {
  font-size: 0.72rem;
  color: var(--gray-400);
  text-align: center;
  margin-top: 8px;
}

.profile-skip-top {
  text-align: center;
  margin-bottom: 12px;
}

.profile-skip-top button {
  background: none;
  border: none;
  color: var(--gray-400);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 4px 12px;
}

.profile-skip-top button:hover {
  color: var(--gold-dark);
}

.profile-form {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Override for full-width items in profile grid */
.profile-grid .form-group-full {
  grid-column: 1 / -1;
}

/* Profile media upload */
.pf-media-upload {
  position: relative;
}

.pf-media-input {
  display: none;
}

.pf-media-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 20px;
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-400);
  text-align: center;
}

.pf-media-dropzone:hover {
  border-color: var(--gold-300);
  background: var(--gold-50);
  color: var(--gold-dark);
}

.pf-media-dropzone-icon {
  color: var(--gray-300);
}

.pf-media-dropzone-text {
  font-size: 0.82rem;
  color: var(--gray-500);
}

.pf-media-dropzone-hint {
  font-size: 0.72rem;
  color: var(--gray-400);
}

.pf-media-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.pf-media-gallery-section {
  margin-top: 8px;
}

.pf-media-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.pf-media-gallery-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.pf-media-gallery-item img,
.pf-media-gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pf-media-gallery-note {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.5);
  color: white;
  font-size: 0.65rem;
  padding: 2px 4px;
  text-align: center;
}

/* Profile actions */
.profile-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.profile-actions .btn {
  flex: 1;
}

/* Hobby input in profile */
#pf-hobbies {
  margin-bottom: 4px;
}

/* Email add button */
#btn-add-email,
#add-email-btn,
.btn-add {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1.5px solid var(--gray-200);
  color: var(--gray-500);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
}

#btn-add-email:hover {
  border-color: var(--gold);
  color: var(--gold-dark);
  background: var(--gold-50);
}

.profile-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.email-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.email-item {
  display: flex;
  gap: 6px;
  align-items: center;
}

.email-item .form-input {
  flex: 1;
}

.hobby-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.hobby-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: var(--gold-50);
  color: var(--gold-dark);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
}

.hobby-tag button {
  background: none;
  border: none;
  color: var(--gold-dark);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0;
  line-height: 1;
}

.hobby-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.suggestion-tag {
  padding: 2px 8px;
  background: var(--gray-100);
  color: var(--gray-600);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.suggestion-tag:hover {
  background: var(--gold-50);
  color: var(--gold-dark);
}

/* Profile media upload */
.pf-media-area {
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-400);
  font-size: 0.82rem;
}

.pf-media-area:hover {
  border-color: var(--gold-300);
  background: var(--gold-50);
  color: var(--gold-dark);
}

.pf-media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.pf-media-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.pf-media-item img,
.pf-media-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pf-media-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 0.7rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pf-media-note {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.5);
  color: white;
  font-size: 0.65rem;
  padding: 2px 4px;
  text-align: center;
}

/* ============================================
   Form extras (表单补充)
   ============================================ */
.form-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--gray-600);
  cursor: pointer;
  margin: 6px 0;
}

.checkbox-input {
  width: 16px;
  height: 16px;
  accent-color: var(--gold);
  cursor: pointer;
}

.checkbox-text {
  color: var(--gray-600);
}

.checkbox-text a,
.link-agreement {
  color: var(--gold-dark);
  text-decoration: underline;
  cursor: pointer;
}

/* ============================================
   Button extras (按钮补充)
   ============================================ */
.btn-role {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 120px;
  height: 120px;
  padding: 0;
  background: var(--white);
  border: 1.5px solid var(--gold-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--navy);
  font-family: var(--font-body);
}

.btn-role:hover {
  border-color: var(--gold);
  background: var(--gold-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-label {
  font-family: var(--font-display);
  font-size: 0.95rem;
}

.btn-text {
  font-size: 0.78rem;
  color: var(--gray-500);
}

.btn-full {
  width: 100%;
}

.btn-loader {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-loading .btn-loader {
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* 保存按钮状态 */
#profile-save-btn.saving .btn-text,
#profile-save-btn.saved .btn-text {
  display: none;
}
#profile-save-btn .btn-loader {
  display: none;
}
#profile-save-btn.saving .btn-loader,
#profile-save-btn.saved .btn-loader {
  display: inline-block;
}
#profile-save-btn.saved .btn-loader {
  border-color: var(--success);
  border-top-color: transparent;
}

/* ============================================
   Chat extras (聊天补充)
   ============================================ */
.chat-file-input {
  display: none;
}

.composer-tool-btn {
  border: none;
  background: transparent;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--gray-500);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}

.composer-tool-btn:hover {
  background: var(--gold-50);
  color: var(--gold-dark);
}

.composer-file-input {
  display: none;
}

/* ============================================
   Modal card variants (弹窗变体)
   ============================================ */
.modal-card-userpage,
.modal-card-detail {
  max-width: 400px;
}

/* ============================================
   Inbox tabs (收件箱标签)
   ============================================ */
.inbox-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 12px;
  border-bottom: 1.5px solid var(--gray-200);
}

.inbox-tab {
  flex: 1;
  padding: 8px;
  background: none;
  border: none;
  font-size: 0.85rem;
  color: var(--gray-400);
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
}

.inbox-tab.active {
  color: var(--gold-dark);
}

.inbox-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1.5px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

.inbox-panel {
  display: none;
}

.inbox-panel.active {
  display: block;
}

/* ============================================
   Agreement content (协议内容)
   ============================================ */
.agreement-content {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--gray-600);
  max-height: 60vh;
  overflow-y: auto;
  padding: 8px 0;
}

.agreement-content h3 {
  font-family: var(--font-display);
  color: var(--navy);
  margin: 16px 0 6px;
  font-size: 0.95rem;
}

.agreement-content p {
  margin-bottom: 8px;
}

/* ============================================
   Welcome footer
   ============================================ */
.welcome-footer {
  text-align: center;
  font-size: 0.72rem;
  color: var(--gray-400);
  padding: 16px 0;
  margin-top: auto;
}

/* ============================================
   Emoji picker extras
   ============================================ */
.emoji-picker {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
  z-index: 50;
  max-height: 320px;
  overflow: hidden;
}

.emoji-picker.show {
  display: block;
}

.emoji-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--gray-100);
}

.emoji-picker-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--navy);
}

.emoji-picker-close {
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
  font-size: 1rem;
}

.emoji-picker-categories {
  display: flex;
  gap: 2px;
  padding: 6px 8px;
  border-bottom: 1px solid var(--gray-100);
  overflow-x: auto;
}

.emoji-picker-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  padding: 8px;
  max-height: 200px;
  overflow-y: auto;
}

/* ============================================
   Context menu extras
   ============================================ */
.msg-context-menu {
  position: fixed;
  z-index: 1000;
  background: var(--white);
  border: 1px solid var(--gold-200);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  padding: 4px 0;
  min-width: 120px;
  display: none;
}

.msg-context-menu.show {
  display: block;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.82rem;
  color: var(--gray-600);
  cursor: pointer;
  transition: background var(--transition);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.context-menu-item:hover {
  background: var(--gold-50);
  color: var(--gold-dark);
}

.context-menu-label {
  font-size: 0.72rem;
  color: var(--gray-400);
  padding: 4px 14px;
}

/* ============================================
   Toast / Island extras
   ============================================ */
.custom-toast-content {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
}

.custom-toast-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.custom-toast-text {
  font-size: 0.82rem;
  color: var(--gray-700);
}

.island-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

.island-text {
  font-size: 0.82rem;
  color: var(--gray-700);
}

/* ============================================
   Moments composer extras
   ============================================ */
.moments-composer-text {
  font-size: 0.85rem;
  color: var(--gray-600);
  min-height: 60px;
}

/* ============================================
   Me Page (我的)
   ============================================ */
.me-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 20px 32px;
  max-width: 400px;
  margin: 0 auto;
}

/* 我的页面激活时隐藏统计栏 */
#panel-me.active ~ .stats-bar-inline,
#panel-me.active + .stats-bar-inline {
  display: none;
}

/* 通过JS控制：当me面板或聊天面板激活时隐藏统计栏 */
body.me-panel-active .stats-bar-inline,
body.chat-panel-active .stats-bar-inline {
  display: none;
}

/* 聊天面板激活时去掉main-body底部padding，让输入框贴着dock栏 */
body.chat-panel-active .main-body {
  padding-bottom: 0;
}
body.chat-panel-active .main-footer {
  display: none;
}
body.chat-panel-active #page-main {
  padding-bottom: calc(56px + var(--safe-bottom, 0px));
}

.me-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 8px;
  box-shadow: 0 4px 12px rgba(201,169,110,0.3);
  cursor: pointer;
  transition: all var(--transition);
  overflow: hidden;
  position: relative;
}

.me-avatar:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 18px rgba(201,169,110,0.4);
}

.me-avatar::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  transition: border-color var(--transition);
}

.me-avatar:hover::after {
  border-color: var(--gold);
}

/* 头像上的相机图标提示 */
.me-avatar-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: 8px;
}
.me-avatar-wrap::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 22px;
  height: 22px;
  background: var(--white);
  border-radius: 50%;
  border: 2px solid var(--gold-200);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='%23c9a96e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z'/%3E%3Ccircle cx='12' cy='13' r='4'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
}

.me-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 2px;
}

.me-role {
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-bottom: 20px;
}

.me-menu {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
}

.me-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--navy);
  transition: background var(--transition);
}

.me-menu-item:hover {
  background: var(--cream);
}

.me-menu-item:active {
  background: var(--gray-100);
}

.me-menu-item svg:first-child {
  color: var(--gold-dark);
  flex-shrink: 0;
}

.me-menu-item span {
  flex: 1;
}

.me-arrow {
  color: var(--gray-400);
  flex-shrink: 0;
}

.me-menu-item-danger {
  color: #e74c3c;
}

.me-menu-item-danger svg:first-child {
  color: #e74c3c;
}

/* ============================================
   Quote preview extras
   ============================================ */
.quote-preview-content {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 6px 10px;
  background: var(--cream);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--gold-300);
  font-size: 0.78rem;
  color: var(--gray-500);
}

.quote-preview-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.quote-preview-close {
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
}

/* ============================================
   Reedit bar
   ============================================ */
#reedit-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--cream);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  color: var(--gray-500);
}

.btn-reedit {
  background: none;
  border: none;
  color: var(--gold-dark);
  cursor: pointer;
  font-size: 0.78rem;
  text-decoration: underline;
}

/* ============================================
   Responsive: Desktop (min-width: 768px)
   ============================================ */
@media (min-width: 768px) {
  #page-main {
    padding-bottom: 0;
  }

  .mobile-bottom-nav {
    display: none;
  }

  .main-tabs {
    display: flex;
  }

  .main-body {
    padding: 12px 20px 24px;
    max-width: 640px;
  }

  .main-header {
    height: 56px;
    padding: 0 20px;
  }

  .header-title {
    font-size: 1.1rem;
  }

  .user-greeting {
    font-size: 0.82rem;
  }

  .chat-container {
    height: calc(100dvh - 56px - 8px - 56px - var(--safe-bottom, 0px));
    max-height: none;
  }

  .chat-message {
    max-width: 72%;
  }

  .classmates-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .classmate-card:hover {
    border-color: var(--gold-100);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
  }

  .moments-feed {
    gap: 14px;
  }

  .moment-card:hover {
    box-shadow: var(--shadow-sm);
  }

  #emoji-picker {
    left: auto;
    right: 16px;
    width: 300px;
  }

  .emoji-grid {
    grid-template-columns: repeat(7, 1fr);
  }

  .welcome-bg {
    padding: 48px 32px;
  }

  .welcome-crest {
    width: 76px;
    height: 76px;
  }

  .welcome-center .title-line-1 {
    font-size: 1.8rem;
  }

  .welcome-center .title-line-2 {
    font-size: 2.2rem;
  }

  .welcome-subtitle {
    font-size: 1.3rem;
  }

  .modal-container,
  .modal-card {
    padding: 28px 24px;
  }
}

@media (min-width: 1024px) {
  .main-body {
    max-width: 720px;
  }

  .classmates-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .chat-container {
    max-height: none;
  }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--gray-200);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-300);
}

/* ============================================
   Selection
   ============================================ */
::selection {
  background: var(--gold-200);
  color: var(--navy);
}
/* ============ 加载开屏 ============ */
.yatai-boot {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--cream);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease, visibility .6s ease;
}
.yatai-boot.done { opacity: 0; visibility: hidden; }
.yatai-boot-inner { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.yatai-boot-logo { width: 56px; height: 56px; border-radius: 13px; overflow: hidden; }
.yatai-boot-logo img { width: 100%; height: 100%; object-fit: contain; display: block; }
.yatai-boot b { font-family: 'Noto Serif SC', serif; font-weight: 600; font-size: 15px; letter-spacing: .2em; color: var(--navy); }
.yatai-boot i { width: 130px; height: 2px; background: var(--gold-200); position: relative; overflow: hidden; border-radius: 2px; }
.yatai-boot i::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, var(--gold), transparent); transform: translateX(-100%); animation: yataiBootLoad 1.2s infinite; }
@keyframes yataiBootLoad { to { transform: translateX(100%); } }