/* ========== 全局主题变量 ========== */
:root {
  /* 深色主题（默认） */
  --bg: #0b0c10;
  --card: #121318;
  --muted: #b9c2d4;
  --text: #f0f3fc;
  --line: #2a2e45;
  --accent: #4f7cff;
  --accent2: #25c2a0;
  --danger: #ff5470;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  --transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
  --card-bg-start: rgba(79,124,255,0.06);
  --card-bg-end: rgba(37,194,160,0.04);
  --input-bg: #0d0f14;
  --header-bg: rgba(8, 9, 16, 0.85);
  --footer-bg: rgba(8, 9, 16, 0.8);
  --border-light: rgba(255, 255, 255, 0.08);
  --btn-bg: rgba(255, 255, 255, 0.04);
  --btn-hover-bg: rgba(255, 255, 255, 0.1);
  --modal-bg: #121318;
}

/* 浅色主题 */
[data-theme="light"] {
  --bg: #f5f7fb;
  --card: #ffffff;
  --muted: #5b6e8c;
  --text: #1e2a3e;
  --line: #dce5f0;
  --accent: #3b6eff;
  --accent2: #1d9e82;
  --danger: #e5484d;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  --card-bg-start: rgba(59,110,255,0.03);
  --card-bg-end: rgba(29,158,130,0.02);
  --input-bg: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.92);
  --footer-bg: rgba(245, 247, 251, 0.95);
  --border-light: rgba(0, 0, 0, 0.08);
  --btn-bg: rgba(0, 0, 0, 0.04);
  --btn-hover-bg: rgba(0, 0, 0, 0.08);
  --modal-bg: #ffffff;
}

/* 跟随系统 */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f7fb;
    --card: #ffffff;
    --muted: #5b6e8c;
    --text: #1e2a3e;
    --line: #dce5f0;
    --accent: #3b6eff;
    --accent2: #1d9e82;
    --danger: #e5484d;
    --shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    --card-bg-start: rgba(59,110,255,0.03);
    --card-bg-end: rgba(29,158,130,0.02);
    --input-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.92);
    --footer-bg: rgba(245, 247, 251, 0.95);
    --border-light: rgba(0, 0, 0, 0.08);
    --btn-bg: rgba(0, 0, 0, 0.04);
    --btn-hover-bg: rgba(0, 0, 0, 0.08);
    --modal-bg: #ffffff;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(circle at 10% 20%, var(--bg), #05060a);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  transition: background 0.2s ease, color 0.2s ease;
}

body.modal-open {
  overflow: hidden;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb {
  background: rgba(79, 124, 255, 0.5);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* 顶部栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
  transition: var(--transition);
}

.topbar-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 12px 24px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  flex: none;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.6px;
  color: #fff;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35), transparent 35%),
    linear-gradient(135deg, rgba(79, 124, 255, 0.95), rgba(37, 194, 160, 0.9));
  box-shadow: 0 8px 20px rgba(79, 124, 255, 0.3);
  transition: var(--transition);
}
.brand-mark:hover {
  transform: scale(1.02);
}

.h1 {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--accent));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.top-icon-btn {
  height: 46px;
  min-width: 46px;
  padding: 0 16px;
  border-radius: 40px;
  border: 1px solid var(--border-light);
  background: var(--btn-bg);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  backdrop-filter: blur(4px);
}
.top-icon-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: rgba(79, 124, 255, 0.15);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}
.top-icon-btn:active {
  transform: translateY(1px);
}

.coffee-btn {
  background: linear-gradient(180deg, rgba(255, 166, 77, 0.2), rgba(255, 140, 66, 0.1));
  border-color: rgba(255, 166, 77, 0.3);
}

.status .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 40px;
  background: var(--btn-bg);
  border: 1px solid var(--border-light);
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
  backdrop-filter: blur(4px);
}

.topbar-sub {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 38px;
  padding: 0 24px 12px;
  border-top: 1px solid var(--border-light);
  color: var(--muted);
  font-size: 13px;
  overflow-x: auto;
  white-space: nowrap;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 20px 48px;
}

/* 卡片 */
.card {
  background: radial-gradient(1200px 600px at 20% -10%, var(--card-bg-start), transparent 45%),
    radial-gradient(900px 600px at 120% 0%, var(--card-bg-end), transparent 38%), var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin: 20px 0;
  transition: var(--transition);
  backdrop-filter: blur(2px);
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 20px 35px rgba(0, 0, 0, 0.2);
}

.card h2 {
  margin: 0 0 16px 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.2px;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
}

/* 栅格与布局 */
.row {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.row-between {
  justify-content: space-between;
}
.row-inline {
  display: flex;
  gap: 12px;
  align-items: center;
}

.grid2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* 表单元素 */
.lab {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin: 12px 0 8px;
  letter-spacing: 0.3px;
}

.input,
.textarea,
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--input-bg);
  border: 1px solid var(--border-light);
  color: var(--text);
  outline: none;
  transition: var(--transition);
  font-size: 14px;
}
.input:focus,
.textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.2);
}

.textarea {
  resize: vertical;
  min-height: 90px;
}

/* 自定义复选框 */
.chk {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}
.chk input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

/* 按钮通用 */
.btn {
  padding: 10px 18px;
  border-radius: 40px;
  border: 1px solid var(--border-light);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.btn:hover {
  background: var(--btn-hover-bg);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(1px);
}
.btn.primary {
  background: linear-gradient(105deg, var(--accent), var(--accent2));
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(79, 124, 255, 0.3);
}
.btn.primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 14px rgba(79, 124, 255, 0.4);
}
.btn.danger {
  background: linear-gradient(105deg, var(--danger), #c03e4a);
  border-color: transparent;
}

.hint {
  margin-top: 14px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  background: rgba(79, 124, 255, 0.03);
  border-radius: 0 8px 8px 0;
}

/* 输出区域 */
.output {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 12px;
}
.item {
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 16px;
  background: rgba(13, 15, 20, 0.8);
  backdrop-filter: blur(4px);
  transition: var(--transition);
}
[data-theme="light"] .item {
  background: rgba(255, 255, 255, 0.8);
}
.item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.3);
}
.item h3 {
  margin: 0 0 8px 0;
  font-size: 15px;
  font-weight: 600;
}
.item .meta {
  font-size: 12px;
  color: var(--muted);
  margin: 6px 0;
}
.item img,
.item video {
  max-width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border-light);
  transition: transform 0.25s ease;
}
.item img:hover,
.item video:hover {
  transform: scale(1.02);
}
.item pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #090a0f;
  border: 1px solid var(--border-light);
  padding: 12px;
  border-radius: 16px;
  color: #cbd5e1;
  font-size: 12px;
  max-height: 280px;
  overflow: auto;
}
[data-theme="light"] .item pre {
  background: #f0f2f5;
  color: #1e2a3e;
}

/* 赞助弹窗 */
.donate-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}
.donate-modal.show {
  display: flex;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    backdrop-filter: blur(0);
  }
  to {
    opacity: 1;
    backdrop-filter: blur(6px);
  }
}
.donate-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
}
.donate-panel {
  position: relative;
  width: min(92vw, 440px);
  margin: auto;
  padding: 28px 24px 24px;
  border-radius: 32px;
  border: 1px solid var(--border-light);
  background: var(--modal-bg);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}
@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
.donate-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  font-size: 24px;
  transition: var(--transition);
}
.donate-close:hover {
  background: var(--danger);
  transform: rotate(90deg);
  color: white;
}
.donate-eyebrow {
  color: #ffb45c;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.donate-panel h3 {
  margin: 0 0 12px;
  font-size: 26px;
  font-weight: 700;
}
.donate-text {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.donate-image {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0 auto 20px;
  border-radius: 24px;
  border: 1px solid var(--border-light);
  background: #fff;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.donate-download {
  width: 100%;
  justify-content: center;
  text-decoration: none;
  display: inline-flex;
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--line);
  padding: 18px 24px;
  color: var(--muted);
  font-size: 12px;
  background: var(--footer-bg);
  backdrop-filter: blur(10px);
  text-align: center;
}

/* 加载指示器 */
.global-loading {
  text-align: center;
  margin: 30px 0;
}
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(79, 124, 255, 0.2);
  border-top: 4px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* 图片预览 */
.image-preview {
  margin-top: 8px;
  max-width: 120px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  overflow: hidden;
}
.image-preview img {
  width: 100%;
  height: auto;
  display: block;
}

/* 响应式 */
@media (max-width: 880px) {
  .grid2,
  .grid3 {
    grid-template-columns: 1fr;
  }
  .output {
    grid-template-columns: 1fr;
  }
  .topbar-main {
    padding: 10px 16px;
  }
  .topbar-sub {
    padding: 0 16px 10px;
  }
  .card {
    padding: 16px;
  }
  .btn {
    padding: 8px 16px;
  }
}

@media (max-width: 520px) {
  .top-icon-btn span {
    display: none;
  }
  .top-icon-btn {
    width: 42px;
    min-width: 42px;
    padding: 0;
    border-radius: 50%;
  }
  .status .badge {
    max-width: 130px;
    font-size: 11px;
    padding: 6px 10px;
  }
  .h1 {
    font-size: 16px;
  }
  .container {
    padding: 0 12px 32px;
  }
}