:root {
  --ios-bg: #f5f5f7;
  --ios-card-bg: #ffffff;
  --ios-text: #1d1d1f;
  --ios-text-secondary: #86868b;
  --ios-blue: #007aff;
  --ios-green: #34c759;
  --ios-red: #ff3b30;
  --ios-orange: #ff9500;
  --ios-purple: #af52de;
  --ios-border: rgba(0, 0, 0, 0.06);
  --ios-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --ios-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --ios-radius: 14px;
  --ios-radius-sm: 10px;
}

* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--ios-bg) !important;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", sans-serif !important;
  color: var(--ios-text);
  min-height: 100vh;
}

.navbar {
  background: rgba(255, 255, 255, 0.72) !important;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: none !important;
  box-shadow: 0 1px 0 var(--ios-border);
  margin-bottom: 0 !important;
  min-height: 52px !important;
  position: relative;
  z-index: 1050;
}

.navbar > .container {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  width: 100% !important;
  max-width: 1200px !important;
  padding: 0 15px !important;
  position: relative;
}

.navbar-header {
  float: none !important;
  display: flex !important;
  align-items: center !important;
}

.navbar-brand {
  float: none !important;
  font-weight: 600 !important;
  color: var(--ios-text) !important;
  font-size: 18px !important;
  letter-spacing: -0.3px;
  padding: 14px 0 !important;
  margin: 0 !important;
}

.navbar-toggle {
  display: block !important;
  float: none !important;
  position: absolute !important;
  right: 15px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  border: none !important;
  background: transparent !important;
  padding: 10px !important;
  margin: 0 !important;
  border-radius: 8px;
  transition: background 0.2s;
  z-index: 1051;
}

.navbar-toggle .icon-bar {
  background-color: var(--ios-blue) !important;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  display: block;
  margin: 5px 0;
}

.navbar-toggle:hover,
.navbar-toggle:focus {
  background: rgba(0, 122, 255, 0.1) !important;
}

.navbar-collapse {
  max-height: none !important;
  border-top: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 !important;
  width: 100% !important;
  float: none !important;
}

.navbar-collapse.collapse {
  display: none !important;
  height: 0 !important;
  overflow: hidden !important;
}

.navbar-collapse.collapse.in,
.navbar-collapse.collapsing {
  display: block !important;
  height: auto !important;
}

.navbar-collapse.in,
.navbar-collapse.collapsing {
  background: rgba(255, 255, 255, 0.98) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--ios-border) !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1) !important;
  padding: 8px 0 !important;
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  z-index: 1049;
}

.navbar-nav {
  margin: 0 !important;
  float: none !important;
  width: 100% !important;
}

.navbar-nav > li {
  float: none !important;
  width: 100% !important;
}

.navbar-nav > li > a {
  padding: 14px 20px !important;
  font-size: 16px !important;
  color: var(--ios-text) !important;
  border-bottom: 1px solid var(--ios-border);
  transition: background 0.15s;
  display: block !important;
}

.navbar-nav > li:last-child > a {
  border-bottom: none;
}

.navbar-nav > li > a:hover {
  background: rgba(0, 122, 255, 0.06) !important;
}

.navbar-nav > li.active > a {
  color: var(--ios-blue) !important;
  background: rgba(0, 122, 255, 0.06) !important;
}

.navbar-nav > li > a i {
  width: 24px;
  margin-right: 10px;
  color: var(--ios-blue);
}

.ios-container {
  padding: 32px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.ios-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.ios-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--ios-text);
  margin: 0;
  letter-spacing: -0.5px;
}

.ios-title small {
  font-size: 14px;
  color: var(--ios-text-secondary);
  font-weight: 400;
  margin-left: 12px;
}

.ios-search {
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.04);
  border-radius: var(--ios-radius-sm);
  padding: 0 4px 0 14px;
  height: 40px;
  width: 260px;
  transition: all 0.2s;
}

.ios-search:focus-within {
  background: rgba(0, 0, 0, 0.06);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.ios-search i {
  color: var(--ios-text-secondary);
  font-size: 14px;
}

.ios-search input {
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  font-size: 15px;
  padding: 0 10px !important;
  color: var(--ios-text);
  flex: 1;
  height: 100%;
}

.ios-search input::placeholder {
  color: var(--ios-text-secondary);
}

.ios-search input:focus {
  outline: none;
}

.ios-search-btn {
  background: var(--ios-blue) !important;
  border: none !important;
  border-radius: 8px !important;
  padding: 8px 16px !important;
  color: #fff !important;
  font-size: 14px !important;
  font-weight: 500;
  height: 32px;
  line-height: 1;
  transition: all 0.2s;
}

.ios-search-btn:hover {
  background: #0066d6 !important;
}

@media (max-width: 768px) {
  .ios-container { padding: 20px 16px; }
  .ios-header {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }
  .ios-title { font-size: 26px; }
  .ios-search { width: 100%; }
}

.ios-file-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

@media (max-width: 1100px) { .ios-file-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; } }
@media (max-width: 900px) { .ios-file-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; } }
@media (max-width: 600px) { 
  .ios-file-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
}

.ios-file-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.ios-file-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.ios-file-icon {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  background: linear-gradient(145deg, #f8f8fa 0%, #ececf0 100%);
  color: var(--ios-text-secondary);
}

.ios-file-icon.type-image { color: var(--ios-orange); background: linear-gradient(145deg, #fff8f0 0%, #ffeddb 100%); }
.ios-file-icon.type-video { color: var(--ios-red); background: linear-gradient(145deg, #fff5f5 0%, #ffe8e8 100%); }
.ios-file-icon.type-audio { color: var(--ios-purple); background: linear-gradient(145deg, #faf5ff 0%, #f0e6ff 100%); }
.ios-file-icon.type-archive { color: #f5a623; background: linear-gradient(145deg, #fffbf0 0%, #fff3db 100%); }
.ios-file-icon.type-document { color: var(--ios-blue); background: linear-gradient(145deg, #f0f7ff 0%, #e0efff 100%); }
.ios-file-icon.type-code { color: #5856d6; background: linear-gradient(145deg, #f5f5ff 0%, #ebebff 100%); }
.ios-file-icon.type-android { color: #3ddc84; background: linear-gradient(145deg, #f0fff5 0%, #e0ffeb 100%); }

.ios-file-info {
  padding: 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--ios-border);
}

.ios-file-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--ios-text);
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.3;
}

.ios-file-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ios-text-secondary);
}

.ios-file-actions {
  display: flex;
}

.ios-file-actions a {
  flex: 1;
  text-align: center;
  padding: 12px 8px;
  color: var(--ios-blue);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s;
}

.ios-file-actions a:hover {
  background: rgba(0, 122, 255, 0.06);
}

.ios-file-actions a:first-child {
  border-right: 1px solid var(--ios-border);
}

.ios-file-actions a i {
  margin-right: 4px;
}

@media (max-width: 600px) {
  .ios-file-card { border-radius: 12px; }
  .ios-file-icon { font-size: 26px; }
  .ios-file-info { padding: 10px; }
  .ios-file-name { font-size: 11px; margin-bottom: 4px; }
  .ios-file-meta { font-size: 9px; }
  .ios-file-actions a { padding: 10px 4px; font-size: 11px; }
  .ios-file-actions a i { display: none; }
}

.ios-pagination-wrap {
  margin-top: 32px;
  text-align: center;
}

.ios-pagination {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--ios-card-bg);
  padding: 4px;
  border-radius: var(--ios-radius);
}

.ios-pagination a,
.ios-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
}

.ios-pagination a {
  color: var(--ios-text);
}

.ios-pagination a:hover {
  background: rgba(0, 122, 255, 0.1);
  color: var(--ios-blue);
}

.ios-pagination span.current {
  background: var(--ios-blue);
  color: #fff;
}

.ios-pagination span.disabled {
  color: var(--ios-text-secondary);
  opacity: 0.4;
  cursor: not-allowed;
}

.ios-page-info {
  color: var(--ios-text-secondary);
  font-size: 13px;
  margin-top: 14px;
}

@media (max-width: 600px) {
  .ios-pagination { padding: 4px; gap: 4px; }
  .ios-pagination a, .ios-pagination span { 
    min-width: 32px; 
    height: 32px; 
    padding: 0 8px; 
    font-size: 13px; 
  }
}

.ios-empty {
  text-align: center;
  padding: 60px 20px;
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
}

.ios-empty i {
  font-size: 48px;
  color: #c7c7cc;
  margin-bottom: 16px;
}

.ios-empty p {
  font-size: 15px;
  color: var(--ios-text-secondary);
  margin: 0;
}

.ios-footer {
  text-align: center;
  padding: 40px 20px 30px;
  color: var(--ios-text-secondary);
  font-size: 13px;
}

.ios-footer a {
  color: var(--ios-blue);
  text-decoration: none;
}

.ios-footer a:hover {
  text-decoration: underline;
}

.well {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin-bottom: 0 !important;
}

.btn-ios {
  background: var(--ios-blue);
  color: #fff;
  border: none;
  border-radius: var(--ios-radius-sm);
  padding: 12px 24px;
  font-weight: 500;
  font-size: 15px;
  transition: all 0.2s;
}

.btn-ios:hover {
  background: #0066d6;
  color: #fff;
  transform: scale(0.98);
}

html {
  scroll-behavior: smooth;
}

::selection {
  background: rgba(0, 122, 255, 0.2);
}

.ios-upload-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  overflow: hidden;
  margin-bottom: 16px;
}

.ios-upload-zone {
  padding: 48px 20px;
  text-align: center;
  border-bottom: 1px solid var(--ios-border);
}

.ios-upload-icon {
  font-size: 48px;
  color: #c7c7cc;
  margin-bottom: 16px;
}

.ios-upload-title {
  font-size: 16px;
  color: var(--ios-text);
  margin: 0 0 4px;
}

.ios-upload-subtitle {
  font-size: 13px;
  color: var(--ios-text-secondary);
  margin: 0 0 24px;
}

.ios-upload-actions {
  margin-top: 0;
}

.ios-btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  font-weight: 400;
  cursor: pointer;
  font-family: inherit;
}

.ios-btn-primary {
  background: var(--ios-blue);
  color: #fff;
}

.ios-btn-lg {
  padding: 11px 32px;
  font-size: 16px;
}

.ios-progress-wrap {
  padding: 20px 0;
}

.ios-progress-bar {
  height: 3px;
  background: #e5e5ea;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}

.ios-progress-fill {
  height: 100%;
  background: var(--ios-blue);
  transition: width 0.3s;
}

.ios-progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ios-text-secondary);
}

.ios-progress-filename {
  flex: 1;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 10px;
  color: var(--ios-text);
}

.ios-progress-percent {
  color: var(--ios-blue);
}

.ios-alert {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
}

.ios-alert-success {
  background: rgba(52, 199, 89, 0.1);
  color: var(--ios-green);
}

.ios-alert-danger {
  background: rgba(255, 59, 48, 0.1);
  color: var(--ios-red);
}

.ios-alert-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  opacity: 0.5;
  padding: 0;
}

.ios-upload-options {
  padding: 0;
}

.ios-checkbox {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--ios-border);
}

.ios-checkbox:last-of-type {
  border-bottom: none;
}

.ios-checkbox input {
  display: none;
}

.ios-checkbox-mark {
  width: 22px;
  height: 22px;
  border: 2px solid #c7c7cc;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ios-checkbox input:checked + .ios-checkbox-mark {
  background: var(--ios-blue);
  border-color: var(--ios-blue);
}

.ios-checkbox input:checked + .ios-checkbox-mark::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
}

.ios-checkbox-text {
  font-size: 15px;
  color: var(--ios-text);
}

.ios-input-group {
  padding: 0 16px 14px 50px;
}

.ios-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #e5e5ea;
  border-radius: 8px;
  font-size: 15px;
  color: var(--ios-text);
  background: #fff;
}

.ios-input:focus {
  outline: none;
  border-color: var(--ios-blue);
}

.ios-input::placeholder {
  color: #c7c7cc;
}

.ios-tips-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  overflow: hidden;
}

.ios-tips-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--ios-bg);
  color: var(--ios-text-secondary);
  font-size: 13px;
}

.ios-tips-body {
  padding: 0;
}

.ios-tips-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ios-text-secondary);
  border-bottom: 1px solid var(--ios-border);
}

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

.ios-tips-item i {
  width: 16px;
  text-align: center;
  font-size: 12px;
  color: #c7c7cc;
}

@media (max-width: 600px) {
  .ios-upload-zone { padding: 40px 16px; }
  .ios-upload-icon { font-size: 40px; }
  .ios-upload-title { font-size: 15px; }
  .ios-upload-subtitle { font-size: 12px; margin-bottom: 20px; }
  .ios-btn-lg { padding: 10px 28px; font-size: 15px; }
}

.ios-auth-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  padding: 32px 24px;
  max-width: 380px;
  margin: 32px auto;
}

.ios-auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.ios-auth-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--ios-text);
  margin: 0 0 6px;
}

.ios-auth-subtitle {
  font-size: 14px;
  color: var(--ios-text-secondary);
  margin: 0;
}

.ios-auth-form {
  margin-bottom: 20px;
}

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

.ios-form-label {
  display: block;
  font-size: 14px;
  color: var(--ios-text);
  margin-bottom: 6px;
}

.ios-btn-block {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border-radius: 10px;
  margin-top: 8px;
}

.ios-auth-switch {
  text-align: center;
  font-size: 14px;
  color: var(--ios-text-secondary);
}

.ios-auth-switch a {
  color: var(--ios-blue);
  text-decoration: none;
}

.ios-auth-divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--ios-text-secondary);
  font-size: 13px;
}

.ios-auth-divider::before,
.ios-auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--ios-border);
}

.ios-auth-divider span {
  padding: 0 14px;
}

.ios-auth-social {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.ios-social-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  text-decoration: none;
}

.ios-social-qq {
  background: #12B7F5;
}

.ios-social-wx {
  background: #1AAD19;
}

@media (max-width: 480px) {
  .ios-auth-card {
    margin: 16px 0;
    padding: 24px 16px;
    border-radius: 0;
  }
}

.ios-captcha-wrap {
  display: flex;
  gap: 12px;
  align-items: center;
}

.ios-captcha-wrap .ios-input {
  flex: 1;
}

.ios-captcha-img {
  height: 40px;
  border-radius: var(--ios-radius-sm);
  cursor: pointer;
  transition: opacity 0.2s;
}

.ios-captcha-img:hover {
  opacity: 0.8;
}

.ios-user-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.ios-user-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--ios-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: #fff;
  flex-shrink: 0;
  overflow: hidden;
}

.ios-user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.ios-user-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ios-text);
  margin: 0 0 4px;
}

.ios-user-meta {
  font-size: 13px;
  color: var(--ios-text-secondary);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ios-user-meta i {
  margin-right: 4px;
}

.ios-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.ios-stat-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  padding: 16px 12px;
  text-align: center;
}

.ios-stat-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 10px;
  background: var(--ios-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
}

.ios-stat-value {
  font-size: 20px;
  font-weight: 600;
  color: var(--ios-text);
  margin-bottom: 2px;
}

.ios-stat-label {
  font-size: 12px;
  color: var(--ios-text-secondary);
}

.ios-menu-card {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  overflow: hidden;
}

.ios-menu-header {
  padding: 10px 16px;
  font-size: 12px;
  color: var(--ios-text-secondary);
  text-transform: uppercase;
  background: var(--ios-bg);
}

.ios-menu-item {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--ios-border);
  cursor: pointer;
  text-decoration: none;
  color: var(--ios-text);
}

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

.ios-menu-item i:first-child {
  width: 24px;
  font-size: 16px;
  color: var(--ios-blue);
}

.ios-menu-item span {
  flex: 1;
  font-size: 15px;
}

.ios-menu-item i:last-child {
  color: #c7c7cc;
  font-size: 14px;
}

.ios-menu-item.ios-menu-danger {
  color: var(--ios-red);
}

.ios-menu-item.ios-menu-danger i:first-child {
  color: var(--ios-red);
}

.ios-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

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

.ios-modal-content {
  background: var(--ios-card-bg);
  border-radius: var(--ios-radius);
  width: 100%;
  max-width: 340px;
  padding: 20px;
}

.ios-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.ios-modal-header h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.ios-modal-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--ios-text-secondary);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

@media (max-width: 600px) {
  .ios-user-card { padding: 16px; gap: 14px; }
  .ios-user-avatar { width: 52px; height: 52px; font-size: 22px; }
  .ios-user-name { font-size: 16px; }
  .ios-stats-grid { gap: 8px; }
  .ios-stat-card { padding: 14px 10px; }
  .ios-stat-icon { width: 32px; height: 32px; font-size: 14px; }
  .ios-stat-value { font-size: 18px; }
}