/* ==================== 字体 ==================== */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@400;500;600;700&family=Share+Tech+Mono&display=swap');

/* ==================== CSS 变量 ==================== */
:root {
    --bg-primary: #080c1a;
    --bg-panel: rgba(12, 18, 36, 0.95);
    --bg-card: rgba(16, 24, 48, 0.8);
    --bg-cell: rgba(10, 14, 30, 0.9);
    --bg-cell-fixed: rgba(18, 26, 52, 0.95);
    --text-primary: #e0f0ff;
    --text-secondary: #8a9bb8;
    --text-dim: #6e7d99;
    --accent-cyan: #00d4ff;
    --accent-green: #00e676;
    --accent-magenta: #d050f0;
    --accent-yellow: #ffb300;
    --accent-red: #ff3366;
    --accent-orange: #ff6d3a;
    --border-subtle: rgba(0, 200, 255, 0.15);
    --border-glow: rgba(0, 200, 255, 0.3);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
}

/* ==================== 全局 ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 30% 20%, rgba(0, 180, 255, 0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 70% 70%, rgba(180, 60, 255, 0.05) 0%, transparent 55%),
        radial-gradient(ellipse at 50% 50%, rgba(0, 200, 200, 0.03) 0%, transparent 60%);
    min-height: 100vh; color: var(--text-secondary);
    overflow-x: hidden;
}
body::before {
    content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
    background-image:
        linear-gradient(rgba(0,200,255,0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,200,255,0.018) 1px, transparent 1px);
    background-size: 48px 48px;
}

/* ==================== 应用容器 ==================== */
.app-container {
    display: flex; flex-direction: column; height: 100vh;
    position: relative; z-index: 1;
}

/* ==================== 顶部工具栏 ==================== */
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 24px; gap: 20px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px); flex-shrink: 0;
}
.topbar-left { display: flex; align-items: center; gap: 16px; }
.logo {
    font-family: var(--font-display); font-size: 1.3em; font-weight: 900;
    letter-spacing: 4px;
    background: linear-gradient(135deg, var(--accent-cyan), #60b0ff);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.difficulty-dropdown select {
    padding: 6px 12px; font-family: var(--font-body); font-size: 0.85em; font-weight: 600;
    background: rgba(0,200,255,0.06); color: var(--text-primary);
    border: 1px solid var(--border-subtle); border-radius: var(--radius-sm);
    cursor: pointer; outline: none;
}
.difficulty-dropdown select option { background: var(--bg-panel); color: var(--text-primary); }

.topbar-center { display: flex; align-items: center; }
.timer-widget { display: flex; align-items: center; gap: 10px; }
.timer-icon { font-size: 1.1em; }
.timer-display { font-family: var(--font-mono); font-size: 1.4em; font-weight: 700; color: var(--text-primary); letter-spacing: 2px; }
.pause-btn {
    width: 30px; height: 30px; border: 1px solid var(--border-subtle);
    background: rgba(0,200,255,0.06); color: var(--text-primary);
    border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-size: 0.8em; transition: all 0.2s;
}
.pause-btn:hover { background: rgba(0,200,255,0.15); border-color: var(--accent-cyan); }

.topbar-right { display: flex; align-items: center; gap: 14px; }
.hints-widget { display: flex; align-items: center; gap: 4px; }
.hints-icon { font-size: 1em; }
.hints-text { font-size: 0.8em; color: var(--text-secondary); }
.hints-count { font-family: var(--font-mono); font-size: 0.9em; font-weight: 700; color: var(--accent-yellow); }
.hint-btn {
    padding: 4px 12px; font-family: var(--font-body); font-size: 0.78em; font-weight: 700;
    border: 1.5px solid rgba(255,179,0,0.45);
    background: rgba(255,179,0,0.1); color: var(--accent-yellow);
    border-radius: var(--radius-sm); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s; letter-spacing: 0.5px;
}
.hint-btn:hover { background: rgba(255,179,0,0.2); border-color: var(--accent-yellow); box-shadow: 0 0 10px rgba(255,179,0,0.3); }
.hint-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.error-toggle { display: flex; align-items: center; gap: 6px; }
.switch { position: relative; display: inline-block; width: 38px; height: 20px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; cursor: pointer; inset: 0;
    background: rgba(100,100,100,0.3); border-radius: 20px; border: 1px solid rgba(100,100,100,0.4); transition: 0.3s;
}
.slider:before {
    content: ""; position: absolute; height: 14px; width: 14px; left: 2px; bottom: 2px;
    background: #666; border-radius: 50%; transition: 0.3s;
}
input:checked + .slider { background: rgba(0,230,118,0.25); border-color: var(--accent-green); }
input:checked + .slider:before { transform: translateX(18px); background: var(--accent-green); box-shadow: 0 0 6px rgba(0,230,118,0.5); }
.switch-label { font-size: 0.75em; color: var(--text-secondary); white-space: nowrap; }

.icon-btn { width: 30px; height: 30px; border: 1px solid var(--border-subtle); background: rgba(0,200,255,0.04); color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1em; transition: all 0.2s; }
.icon-btn:hover { background: rgba(0,200,255,0.1); color: var(--text-primary); }

/* ==================== 主体三栏 ==================== */
.main-body { display: flex; flex: 1; overflow: hidden; }

/* --- 左侧栏 --- */
.left-panel {
    width: 220px; flex-shrink: 0;
    padding: 20px 16px; display: flex; flex-direction: column; gap: 18px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-subtle); overflow-y: auto;
}
.panel-section { }
.section-heading {
    font-family: var(--font-display); font-size: 0.75rem; font-weight: 600;
    color: var(--text-dim); text-transform: uppercase; letter-spacing: 2px;
    margin-bottom: 10px;
}

/* 模式卡片 */
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.mode-card {
    display: flex; align-items: center; justify-content: center; gap: 2px;
    padding: 10px 8px; background: var(--bg-card);
    border: 1.5px solid rgba(0,200,255,0.15); border-radius: var(--radius-sm);
    cursor: pointer; transition: all 0.2s; font-family: var(--font-mono);
}
.mode-card:hover { border-color: rgba(0,200,255,0.35); background: rgba(0,200,255,0.05); }
.mode-card.active {
    border-color: var(--accent-cyan); background: rgba(0,200,255,0.1);
    box-shadow: 0 0 14px rgba(0,200,255,0.2), inset 0 0 10px rgba(0,200,255,0.05);
}
.mode-num { font-size: 1.1em; font-weight: 700; color: var(--text-primary); }
.mode-x { font-size: 0.9em; color: var(--text-dim); }
.mode-card.active .mode-num { color: var(--accent-cyan); }

/* 难度滑动条 */
.difficulty-slider {
    width: 100%; -webkit-appearance: none; appearance: none;
    height: 6px; border-radius: 3px;
    background: linear-gradient(to right, var(--accent-green), var(--accent-yellow), var(--accent-orange), var(--accent-red), var(--accent-magenta));
    outline: none; margin-bottom: 6px;
}
.difficulty-slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 18px; height: 18px; border-radius: 50%;
    background: #fff; border: 2px solid var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0,200,255,0.5); cursor: pointer;
}
.difficulty-labels { display: flex; justify-content: space-between; }
.diff-label { font-size: 0.75rem; color: var(--text-secondary); cursor: pointer; transition: color 0.2s; }
.diff-label:hover { color: var(--text-primary); }
.diff-label.active { color: var(--text-primary); font-weight: 700; text-shadow: 0 0 6px rgba(0,200,255,0.4); }

/* 开始按钮 */
.start-btn {
    width: 100%; padding: 12px;
    font-family: var(--font-display); font-size: 0.85em; font-weight: 700;
    letter-spacing: 2px; text-transform: uppercase;
    background: linear-gradient(135deg, rgba(0,200,255,0.15), rgba(120,60,255,0.15));
    border: 1.5px solid var(--accent-cyan); color: var(--accent-cyan);
    border-radius: var(--radius-md); cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: all 0.3s; box-shadow: 0 0 16px rgba(0,200,255,0.15);
}
.start-btn:hover {
    background: linear-gradient(135deg, rgba(0,200,255,0.25), rgba(120,60,255,0.25));
    box-shadow: 0 0 28px rgba(0,200,255,0.3); transform: translateY(-1px);
}
.start-icon { font-size: 0.75rem; }

/* 主题圆点 */
.theme-section { margin-top: auto; }
.theme-row { display: flex; gap: 10px; justify-content: center; }
.theme-dot {
    width: 20px; height: 20px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.15);
    cursor: pointer; transition: all 0.2s;
}
.theme-dot[data-theme="cyber"] { background: #080c1a; border-color: #00d4ff; }
.theme-dot[data-theme="light"] { background: #f0f2f5; }
.theme-dot[data-theme="classic"] { background: #1a2332; border-color: #4a90d9; }
.theme-dot[data-theme="green"] { background: #1a2620; border-color: #5cb85c; }
.theme-dot[data-theme="dark"] { background: #0d0d0d; }
.theme-dot.active { border-color: #fff; box-shadow: 0 0 12px rgba(255,255,255,0.6), 0 0 24px rgba(255,255,255,0.2); transform: scale(1.3); }
.theme-dot:hover { transform: scale(1.15); }

/* --- 中央面板 --- */
.center-panel {
    flex: 1; display: flex; flex-direction: column; align-items: center;
    justify-content: center; padding: 16px; gap: 10px; overflow: auto;
}
.game-board { }
.auto-save-status { font-size: 0.75rem; color: var(--text-dim); margin-top: 4px; }

/* 数独网格 */
.sudoku-grid {
    display: inline-grid; gap: 0;
    border: 2px solid var(--accent-cyan);
    background: rgba(0,180,255,0.05);
    box-shadow: 0 0 30px rgba(0,180,255,0.18), 0 8px 40px rgba(0,0,0,0.6);
}
:root { --cell-size: 60px; }
.cell {
    width: var(--cell-size); height: var(--cell-size);
    border: 1px solid rgba(0,180,255,0.18);
    background: var(--bg-cell); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.12s; position: relative;
}
.cell input { font-size: calc(var(--cell-size) * 0.024); }
.cell:hover:not(.fixed) { background: rgba(0,200,255,0.08); }
.cell input {
    width: 100%; height: 100%; border: none; text-align: center;
    font-family: var(--font-mono); font-size: 1.45em; font-weight: 700;
    background: transparent; outline: none; color: var(--text-primary);
}
.cell.fixed { background: var(--bg-cell-fixed); cursor: not-allowed; }
.cell.fixed input { color: #c8d8f0; opacity: 0.85; }
.cell.selected { background: rgba(0,200,255,0.18) !important; border: 2px solid var(--accent-cyan); box-shadow: 0 0 20px rgba(0,200,255,0.5), inset 0 0 14px rgba(0,200,255,0.15); }
.cell.border-right { border-right: 2px solid var(--accent-cyan); }
.cell.border-bottom { border-bottom: 2px solid var(--accent-cyan); }

/* 格子自适应（默认尺寸由JS设置 --cell-size） */
.sudoku-grid.grid-size-4 .cell { width: var(--cell-size); height: var(--cell-size); }
.sudoku-grid.grid-size-6 .cell { width: var(--cell-size); height: var(--cell-size); }
.sudoku-grid.grid-size-8 .cell { width: var(--cell-size); height: var(--cell-size); }
.sudoku-grid.grid-size-9 .cell { width: var(--cell-size); height: var(--cell-size); }

/* 高亮 & 冲突 */
.cell.highlight-rowcol { background: rgba(0,200,255,0.08) !important; border-color: rgba(0,200,255,0.25) !important; }
.cell.highlight-box { background: rgba(0,200,255,0.04) !important; }
.cell.highlight-same-number { border-color: var(--accent-magenta) !important; box-shadow: 0 0 10px rgba(208,80,240,0.35) !important; }
.cell.highlight-same-number input { color: var(--accent-magenta); }
.cell.hint-cell { background: rgba(255,179,0,0.25) !important; border-color: var(--accent-yellow) !important; animation: hintPulse 1.5s ease; }
@keyframes hintPulse { 0%,100% { box-shadow: 0 0 20px rgba(255,179,0,0.5); } 50% { box-shadow: 0 0 40px rgba(255,179,0,0.9); } }
.cell.conflict { background: rgba(255,51,102,0.2) !important; border-color: var(--accent-red) !important; }
.cell.conflict-related { background: rgba(255,179,0,0.08) !important; }
.cell.correct { background: rgba(0,230,118,0.12) !important; border-color: var(--accent-green) !important; }
.cell.correct input { color: var(--accent-green); }
.cell.wrong { background: rgba(255,51,102,0.15) !important; border-color: var(--accent-red) !important; animation: shake 0.3s; }
.cell.wrong input { color: var(--accent-red); }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

/* 候选数 */
.cell .pencil-marks { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; height: 100%; padding: 1px; }
.cell .pencil-mark { font-size: 0.75em; color: rgba(0,200,255,0.4); display: flex; align-items: center; justify-content: center; }
.cell.pencil-mode { background: rgba(255,179,0,0.04); }

/* --- 右侧面板 --- */
.right-panel {
    width: 210px; flex-shrink: 0;
    padding: 20px 14px; display: flex; flex-direction: column; gap: 16px;
    background: var(--bg-panel);
    border-left: 1px solid var(--border-subtle); overflow-y: auto;
}

/* 工具按钮 */
.tools-row { display: flex; gap: 10px; justify-content: center; }
.tool-btn {
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.tool-circle {
    width: 44px; height: 44px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono); font-size: 1.1em; font-weight: 700;
    border: 2px solid rgba(0,200,255,0.25);
    background: rgba(0,200,255,0.05);
    color: var(--text-secondary); transition: all 0.2s;
}
.tool-btn.active .tool-circle { border-color: var(--accent-cyan); background: rgba(0,200,255,0.18); color: var(--accent-cyan); box-shadow: 0 0 14px rgba(0,200,255,0.3); }
.tool-btn:hover .tool-circle { border-color: var(--accent-cyan); background: rgba(0,200,255,0.1); }
.tool-label { font-size: 0.75rem; color: var(--text-secondary); font-weight: 600; }

/* 操作按钮 */
.ops-list { display: flex; flex-direction: column; gap: 4px; }
.op-btn {
    display: flex; justify-content: space-between; align-items: center;
    padding: 6px 10px; background: var(--bg-card);
    border: 1px solid rgba(0,200,255,0.08); border-radius: var(--radius-sm);
    cursor: pointer; transition: all 0.2s; width: 100%;
}
.op-btn:hover:not(:disabled) { border-color: rgba(0,200,255,0.3); background: rgba(0,200,255,0.06); }
.op-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.op-key { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); }
.op-name { font-family: var(--font-body); font-size: 0.8rem; color: var(--text-secondary); font-weight: 600; }

/* 游戏信息 */
.game-info { display: flex; flex-direction: column; gap: 6px; }
.info-row { display: flex; justify-content: space-between; align-items: center; }
.info-label { font-size: 0.75rem; color: var(--text-dim); }
.info-value { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-primary); font-weight: 700; }
.error-count { color: var(--accent-red); }
.progress-bar-wrapper {
    height: 10px; background: rgba(255,255,255,0.08); border-radius: 5px; overflow: hidden; margin-top: 4px;
}
.progress-bar {
    height: 100%; background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
    border-radius: 5px; transition: width 0.4s;
    box-shadow: 0 0 8px rgba(0,200,255,0.3);
}
.progress-text { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); text-align: right; }

/* 视图缩放 */
.zoom-controls { display: flex; align-items: center; gap: 6px; justify-content: center; }
.zoom-btn {
    width: 30px; height: 30px;
    font-family: var(--font-mono); font-size: 1.1em; font-weight: 700;
    border: 1px solid var(--border-subtle);
    background: rgba(0,200,255,0.04); color: var(--text-secondary);
    border-radius: var(--radius-sm); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.15s;
}
.zoom-btn:hover { background: rgba(0,200,255,0.14); color: var(--text-primary); border-color: var(--accent-cyan); }
.zoom-reset { font-size: 0.85em; }
.zoom-value { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-primary); min-width: 40px; text-align: center; }

/* 快捷键 */
.hotkeys-section { margin-top: auto; }
.hotkeys-toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; background: none; border: none; width: 100%; padding: 0; }
.hotkeys-toggle:hover .hk-arrow { color: var(--text-primary); }
.hk-arrow { font-size: 0.75rem; color: var(--text-dim); transition: transform 0.2s; display: inline-block; }
.hotkeys-toggle.open .hk-arrow { transform: rotate(90deg); }
.hotkey-grid { display: flex; flex-direction: column; gap: 3px; }
.hk-row { display: flex; align-items: center; gap: 8px; font-size: 0.75rem; color: var(--text-dim); }
.hk-row kbd {
    font-family: var(--font-mono); font-size: 0.75rem;
    background: rgba(0,200,255,0.06); border: 1px solid rgba(0,200,255,0.12);
    color: var(--text-secondary); border-radius: 3px; padding: 1px 5px; min-width: 30px; text-align: center;
}

/* ==================== 数字栏（面板下方居中） ==================== */
.number-strip { display: flex; gap: 6px; align-items: center; justify-content: center; margin-top: 10px; }
.num-key {
    width: 52px; height: 64px;
    font-family: var(--font-mono); font-weight: 700;
    border: 1.5px solid rgba(0,200,255,0.3);
    background: rgba(0,200,255,0.04); color: var(--text-primary);
    border-radius: var(--radius-sm); cursor: pointer; transition: all 0.15s;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 1px; position: relative;
}
.num-count {
    font-family: var(--font-body); font-size: 0.75rem; font-weight: 600;
    color: rgba(0,200,255,0.45); line-height: 1;
}
.num-label { font-size: 1.2em; line-height: 1; }
.num-key:hover:not(.used-up) { background: rgba(0,200,255,0.14); border-color: var(--accent-cyan); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,200,255,0.2); }
.num-key:active:not(.used-up) { transform: scale(0.95); }
.num-key.used-up { opacity: 0.2; pointer-events: none; border-color: rgba(100,100,100,0.15); color: #555; }
.num-key.used-up .num-count { color: rgba(100,100,100,0.3); }
.delete-key { border-color: rgba(255,51,102,0.3); background: rgba(255,51,102,0.04); color: var(--accent-red); }
.delete-key .num-label { font-size: 1.4em; }
.delete-key:hover { background: rgba(255,51,102,0.14); border-color: var(--accent-red); box-shadow: 0 4px 12px rgba(255,51,102,0.2); }

/* ==================== 底部操作栏 ==================== */
.bottombar {
    display: flex; align-items: center; justify-content: center; gap: 16px;
    padding: 6px 24px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-subtle); flex-shrink: 0;
}
.bottombar-actions { display: flex; align-items: center; gap: 10px; }
.action-btn {
    padding: 10px 16px; font-family: var(--font-body); font-size: 0.8em; font-weight: 700;
    border: 1.5px solid; border-radius: var(--radius-sm); cursor: pointer;
    text-transform: uppercase; letter-spacing: 1px; transition: all 0.2s; white-space: nowrap;
}
.check-btn { background: rgba(0,230,118,0.06); color: var(--accent-green); border-color: rgba(0,230,118,0.35); }
.check-btn:hover { background: rgba(0,230,118,0.14); box-shadow: 0 0 12px rgba(0,230,118,0.2); }
.pause-game-btn { background: rgba(255,179,0,0.06); color: var(--accent-yellow); border-color: rgba(255,179,0,0.35); }
.pause-game-btn:hover { background: rgba(255,179,0,0.14); box-shadow: 0 0 12px rgba(255,179,0,0.2); }
.reset-btn { background: rgba(255,51,102,0.06); color: var(--accent-red); border-color: rgba(255,51,102,0.35); }
.reset-btn:hover { background: rgba(255,51,102,0.14); box-shadow: 0 0 12px rgba(255,51,102,0.2); }

.message-area {
    font-size: 0.75rem; color: var(--text-dim); max-width: 400px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    min-height: 1.2em; line-height: 1.4;
}

/* 完成庆祝 */
.sudoku-grid.completed {
    animation: celebrateGlow 0.8s ease-in-out 3;
}
@keyframes celebrateGlow {
    0%, 100% { box-shadow: 0 0 30px rgba(0,180,255,0.18), 0 8px 40px rgba(0,0,0,0.6); border-color: var(--accent-cyan); }
    50% { box-shadow: 0 0 50px rgba(0,230,118,0.6), 0 0 80px rgba(0,230,118,0.3), 0 8px 40px rgba(0,0,0,0.6); border-color: var(--accent-green); }
}

/* ==================== 无障碍 ==================== */
.cell input:focus-visible { outline: 2px solid var(--accent-cyan); outline-offset: -2px; }
button:focus-visible { outline: 2px solid var(--accent-yellow); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
    .cell, .num-key, .action-btn, .tool-btn, .mode-card { transition: none; }
    .cell.wrong { animation: none; }
}

/* ==================== H5 移动端 ==================== */

/* ===================================================================== */
/*                         H5 移动端 (< 768px)                           */
/* ===================================================================== */
@media (max-width: 767px) {
    /* 隐藏桌面面板，保留棋盘 */
    .topbar, .left-panel, .right-panel, .bottombar { display: none !important; }
    .main-body { flex-direction: column; }
    .center-panel { padding: 56px 4px 120px; }
    .app-container { flex-direction: column; height: auto; min-height: 100vh; }

    body { background: var(--bg-primary); background-image: none; overflow-x: hidden; }
    body::before { display: none; }

    /* 顶栏 */
    .mobile-topbar {
        display: flex; align-items: center; justify-content: space-between;
        padding: 8px 14px; background: var(--bg-panel);
        border-bottom: 1px solid var(--border-subtle);
        position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    }
    .mobile-logo {
        font-family: var(--font-display); font-size: 1em; font-weight: 900; letter-spacing: 3px;
        background: linear-gradient(135deg, var(--accent-cyan), #60b0ff);
        -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .mobile-timer { font-family: var(--font-mono); font-size: 1.2em; font-weight: 700; color: var(--text-primary); letter-spacing: 1px; }
    .timer-group { display: flex; align-items: center; gap: 4px; }
    .mobile-pause-btn {
        width: 30px; height: 30px; font-size: 0.9em;
        border: 1px solid var(--border-subtle); background: rgba(0,200,255,0.04);
        color: var(--text-secondary); border-radius: 50%; cursor: pointer;
        display: flex; align-items: center; justify-content: center; flex-shrink: 0;
        transition: all 0.15s; touch-action: manipulation;
    }
    .mobile-pause-btn:hover { background: rgba(0,200,255,0.12); color: var(--text-primary); }
    .mobile-pause-btn.paused { border-color: var(--accent-yellow); color: var(--accent-yellow); background: rgba(255,179,0,0.08); }
    .mobile-menu-btn {
        width: 36px; height: 36px; font-size: 1.1em;
        border: 1px solid var(--border-subtle); background: rgba(0,200,255,0.05);
        color: var(--text-primary); border-radius: var(--radius-sm); cursor: pointer;
        display: flex; align-items: center; justify-content: center;
    }

    /* 隐藏独立的移动端游戏区（使用桌面棋盘） */
    .mobile-game-area { display: none; }
    .sudoku-grid { box-shadow: 0 0 18px rgba(0,180,255,0.15); }

    /* 格子自适应移动端 */
    .cell { width: 46px; height: 46px; }
    .cell input { font-size: 1.1em; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
    .sudoku-grid.grid-size-6 .cell { width: 38px; height: 38px; }
    .sudoku-grid.grid-size-6 .cell input { font-size: 0.95em; }
    .sudoku-grid.grid-size-9 .cell { width: 34px; height: 34px; }
    .sudoku-grid.grid-size-9 .cell input { font-size: 0.82em; }

    /* 数字键盘内联，触控优化 */
    .number-strip { gap: 5px; margin-top: 8px; flex-wrap: wrap; max-width: 320px; margin-left: auto; margin-right: auto; }
    .number-strip .num-key { width: 38px; height: 50px; }
    .number-strip .num-count { font-size: 0.6rem; }
    .number-strip .num-label { font-size: 1em; }
    .num-key { touch-action: manipulation; }

    /* 底部栏 */
    .mobile-bottom-bar {
        display: flex; justify-content: space-evenly; align-items: center;
        position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
        padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
        background: var(--bg-panel); border-top: 1px solid var(--border-subtle);
    }
    .mobile-action-btn {
        padding: 10px 16px; font-family: var(--font-body); font-size: 0.85em; font-weight: 700;
        border: 1.5px solid; border-radius: var(--radius-sm); cursor: pointer;
        text-transform: uppercase; letter-spacing: 1px; white-space: nowrap;
        touch-action: manipulation; transition: all 0.15s;
    }
    .mobile-action-btn:active { transform: scale(0.92); }
    .hint-action { border-color: rgba(255,179,0,0.4); background: rgba(255,179,0,0.08); color: var(--accent-yellow); }
    .check-action { border-color: rgba(0,230,118,0.4); background: rgba(0,230,118,0.08); color: var(--accent-green); }
    .reset-action { border-color: rgba(255,51,102,0.4); background: rgba(255,51,102,0.08); color: var(--accent-red); }

    /* 抽屉 */
    .drawer-overlay { display: block; position: fixed; inset: 0; z-index: 300; background: rgba(0,0,0,0.5); opacity: 0; pointer-events: none; transition: opacity 0.3s; }
    .drawer-overlay.open { opacity: 1; pointer-events: auto; }
    .drawer { display: block; position: fixed; bottom: 0; left: 0; right: 0; z-index: 310; background: var(--bg-panel); border-radius: 18px 18px 0 0; border-top: 1px solid var(--border-glow); max-height: 75vh; overflow-y: auto; transform: translateY(100%); transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1); }
    .drawer.open { transform: translateY(0); }
    .drawer-handle { width: 36px; height: 4px; background: rgba(255,255,255,0.25); border-radius: 2px; margin: 10px auto 8px; }
    .drawer-content { padding: 0 20px 24px; }
    .drawer-section { margin-bottom: 16px; }
    .drawer-section h4 { font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 2px; margin-bottom: 10px; }
    .mode-buttons, .difficulty-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
    .mode-btn, .difficulty-btn { padding: 10px; font-family: var(--font-body); font-size: 0.82rem; font-weight: 600; border: 1.5px solid var(--border-subtle); background: var(--bg-card); color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; text-align: center; transition: all 0.15s; }
    .mode-btn.active, .difficulty-btn.active { border-color: var(--accent-cyan); background: rgba(0,200,255,0.12); color: var(--accent-cyan); }
    .theme-buttons { display: flex; flex-wrap: wrap; gap: 6px; }
    .theme-btn { padding: 8px 12px; font-family: var(--font-body); font-size: 0.75rem; font-weight: 600; border: 1.5px solid var(--border-subtle); background: rgba(255,179,0,0.05); color: var(--accent-yellow); border-radius: var(--radius-sm); cursor: pointer; flex: 1; min-width: 48px; text-align: center; }
    .theme-btn.active { background: rgba(255,179,0,0.18); border-color: var(--accent-yellow); }

    .stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
    .stat-item { background: rgba(0,200,255,0.04); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); padding: 10px; text-align: center; }
    .stat-value { display: block; font-family: var(--font-mono); font-size: 1.2em; font-weight: 700; color: var(--text-primary); }
    .stat-label { display: block; font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; margin-top: 2px; }

    .mobile-toast { display: block; position: fixed; top: 56px; left: 50%; transform: translateX(-50%); padding: 10px 18px; border-radius: 8px; font-family: var(--font-body); font-size: 0.85em; font-weight: 600; z-index: 400; pointer-events: none; opacity: 0; transition: opacity 0.3s; white-space: pre-line; text-align: center; max-width: 90vw; }
    .mobile-toast.show { opacity: 1; }
    .mobile-toast.info { background: rgba(0,200,255,0.18); color: var(--text-primary); border: 1px solid rgba(0,200,255,0.4); }
    .mobile-toast.success { background: rgba(0,230,118,0.18); color: var(--accent-green); border: 1px solid var(--accent-green); }
    .mobile-toast.error { background: rgba(255,51,102,0.18); color: var(--accent-red); border: 1px solid rgba(255,51,102,0.4); }
}

/* ==================== 主题 ==================== */
body[data-theme="light"] {
    --bg-primary: #f0f2f5; --bg-panel: #ffffff; --bg-card: #f8fafc;
    --bg-cell: #ffffff; --bg-cell-fixed: #eef2f6;
    --text-primary: #0f172a; --text-secondary: #475569; --text-dim: #64748b;
    --accent-cyan: #2563eb; --accent-green: #059669; --accent-magenta: #6d28d9;
    --accent-yellow: #b45309; --accent-red: #dc2626; --accent-orange: #ea580c;
    --border-subtle: #cbd5e1; --border-glow: #93c5fd;
    background: #f0f2f5; background-image: none;
}
body[data-theme="light"]::before { display: none; }
body[data-theme="light"] .logo { background: linear-gradient(135deg, #2563eb, #6d28d9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
body[data-theme="light"] .timer-display,
body[data-theme="light"] .timer-label,
body[data-theme="light"] .timer-icon { color: #0f172a; }
body[data-theme="light"] .timer-btn { border-color: #cbd5e1; background: rgba(37,99,235,0.06); color: #2563eb; }
body[data-theme="light"] .sudoku-grid { box-shadow: 0 2px 20px rgba(0,0,0,0.06); border-color: #2563eb; }
body[data-theme="light"] .cell { border-color: #cbd5e1; }
body[data-theme="light"] .cell.fixed input { color: #334155; }
body[data-theme="light"] .cell .pencil-mark { color: rgba(37,99,235,0.5); }
body[data-theme="light"] .cell.border-right { border-right-color: #93c5fd; }
body[data-theme="light"] .cell.border-bottom { border-bottom-color: #93c5fd; }
body[data-theme="light"] .cell.highlight-rowcol { background: rgba(37,99,235,0.06) !important; border-color: rgba(37,99,235,0.2) !important; }
body[data-theme="light"] .cell.highlight-box { background: rgba(37,99,235,0.03) !important; }
body[data-theme="light"] .cell.highlight-same-number,
body[data-theme="light"] .cell.highlight-same-number input { border-color: #6d28d9 !important; color: #6d28d9; }
body[data-theme="light"] .num-key { border-color: #cbd5e1; background: rgba(37,99,235,0.04); color: #0f172a; }
body[data-theme="light"] .num-key:hover { background: rgba(37,99,235,0.1); border-color: #2563eb; }
body[data-theme="light"] .num-count { color: #64748b; }
body[data-theme="light"] .num-key.used-up { opacity: 0.25; border-color: #d1d5db; color: #94a3b8; }
body[data-theme="light"] .num-key.used-up .num-count { color: #94a3b8; }
body[data-theme="light"] .delete-key { border-color: rgba(220,38,38,0.3); color: #dc2626; }
body[data-theme="light"] .hint-btn { border-color: #cbd5e1; background: rgba(180,83,9,0.08); color: #b45309; }
body[data-theme="light"] .hints-count { color: #b45309; }
body[data-theme="light"] .hints-text { color: #475569; }
body[data-theme="light"] .switch-label { color: #475569; }
body[data-theme="light"] .settings-btn { color: #475569; }
body[data-theme="light"] .control-btn { box-shadow: none; }
body[data-theme="light"] .mode-card { border-color: #cbd5e1; background: #f8fafc; }
body[data-theme="light"] .mode-card .mode-num { color: #0f172a; }
body[data-theme="light"] .mode-card .mode-x { color: #64748b; }
body[data-theme="light"] .mode-card.active { border-color: #2563eb; background: #eff6ff; }
body[data-theme="light"] .mode-card.active .mode-num { color: #2563eb; }
body[data-theme="light"] .difficulty-slider { background: linear-gradient(to right, #059669, #b45309, #ea580c, #dc2626, #6d28d9); }
body[data-theme="light"] .diff-label.active { color: #0f172a; }
body[data-theme="light"] .theme-dot { border-color: #cbd5e1; }
body[data-theme="light"] .theme-dot.active { border-color: #0f172a; }
body[data-theme="light"] .start-btn { border-color: #2563eb; color: #2563eb; background: #eff6ff; }
body[data-theme="light"] .tool-circle { border-color: #cbd5e1; background: #f8fafc; color: #64748b; }
body[data-theme="light"] .tool-btn.active .tool-circle { border-color: #2563eb; background: #eff6ff; color: #2563eb; }
body[data-theme="light"] .op-btn { border-color: #e5e7eb; background: #f8fafc; }
body[data-theme="light"] .op-btn:hover:not(:disabled) { border-color: #2563eb; background: #eff6ff; }
body[data-theme="light"] .op-name { color: #0f172a; }
body[data-theme="light"] .op-key { color: #64748b; }
body[data-theme="light"] .section-heading { color: #475569; }
body[data-theme="light"] .info-label { color: #64748b; }
body[data-theme="light"] .info-value { color: #0f172a; }
body[data-theme="light"] .progress-bar-wrapper { background: #e5e7eb; }
body[data-theme="light"] .message-area { color: #475569; }
body[data-theme="light"] .auto-save-status { color: #64748b; }
body[data-theme="light"] .hk-row { color: #64748b; }
body[data-theme="light"] .hk-row kbd { background: #f1f5f9; border-color: #cbd5e1; color: #475569; }
body[data-theme="light"] .hk-arrow { color: #64748b; }
body[data-theme="light"] .zoom-btn { border-color: #cbd5e1; background: #f8fafc; color: #64748b; }
body[data-theme="light"] .zoom-btn:hover { background: #eff6ff; color: #2563eb; }
body[data-theme="light"] .zoom-value { color: #0f172a; }
body[data-theme="light"] .realtime-check-container { background: #f8fafc; border-color: #cbd5e1; }
body[data-theme="light"] .hint-count,
body[data-theme="light"] .timer-container { background: #f8fafc; border-color: #cbd5e1; }

/* --- 经典蓝主题 --- */
body[data-theme="classic"] {
    --bg-primary: #1a2332; --bg-panel: #1e2d3d; --bg-card: #243447;
    --bg-cell: rgba(26,35,50,0.9); --bg-cell-fixed: rgba(74,144,217,0.1);
    --text-primary: #c8ddf0; --text-secondary: #8fadc9; --text-dim: #5a7a9a;
    --accent-cyan: #4a90d9; --accent-green: #5cb85c; --accent-magenta: #e8913a;
    --accent-yellow: #f0c040; --accent-red: #d9534f; --accent-orange: #e8803a;
    --border-subtle: rgba(74,144,217,0.2); --border-glow: rgba(74,144,217,0.35);
    background: #1a2332; background-image: none;
}
body[data-theme="classic"]::before { display: none; }
body[data-theme="classic"] .logo { background: linear-gradient(135deg, #4a90d9, #5cb85c); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
body[data-theme="classic"] .sudoku-grid { border-color: #4a90d9; box-shadow: 0 0 24px rgba(74,144,217,0.15); }
body[data-theme="classic"] .cell { border-color: rgba(74,144,217,0.18); }
body[data-theme="classic"] .cell.border-right,
body[data-theme="classic"] .cell.border-bottom { border-color: #4a90d9; }
body[data-theme="classic"] .cell.selected { border-color: #4a90d9; box-shadow: 0 0 16px rgba(74,144,217,0.4); }
body[data-theme="classic"] .cell .pencil-mark { color: rgba(74,144,217,0.5); }
body[data-theme="classic"] .cell.highlight-rowcol { background: rgba(74,144,217,0.08) !important; border-color: rgba(74,144,217,0.25) !important; }
body[data-theme="classic"] .cell.highlight-box { background: rgba(74,144,217,0.04) !important; }
body[data-theme="classic"] .cell.highlight-same-number,
body[data-theme="classic"] .cell.highlight-same-number input { border-color: #e8913a !important; color: #e8913a; }
body[data-theme="classic"] .num-key { border-color: rgba(74,144,217,0.3); background: rgba(74,144,217,0.05); color: #c8ddf0; }
body[data-theme="classic"] .num-key:hover { background: rgba(74,144,217,0.15); border-color: #4a90d9; }
body[data-theme="classic"] .num-count { color: rgba(74,144,217,0.55); }
body[data-theme="classic"] .num-key.used-up { border-color: rgba(100,120,150,0.2); }
body[data-theme="classic"] .delete-key { border-color: rgba(217,83,79,0.3); }
body[data-theme="classic"] .timer-display,
body[data-theme="classic"] .timer-label,
body[data-theme="classic"] .timer-icon { color: #c8ddf0; }
body[data-theme="classic"] .timer-btn { border-color: rgba(74,144,217,0.3); background: rgba(74,144,217,0.08); color: #4a90d9; }
body[data-theme="classic"] .mode-card { border-color: rgba(74,144,217,0.2); background: #243447; }
body[data-theme="classic"] .mode-card.active { border-color: #4a90d9; background: rgba(74,144,217,0.15); }
body[data-theme="classic"] .mode-card.active .mode-num { color: #4a90d9; }
body[data-theme="classic"] .section-heading { color: #5a7a9a; }
body[data-theme="classic"] .description { color: #8fadc9; }
body[data-theme="classic"] .guarantee { color: #5cb85c; }

/* --- 护眼绿主题 --- */
body[data-theme="green"] {
    --bg-primary: #1a2620; --bg-panel: rgba(25,38,32,0.95); --bg-card: rgba(30,44,36,0.8);
    --bg-cell: rgba(26,38,32,0.9); --bg-cell-fixed: rgba(92,184,92,0.08);
    --text-primary: #c8e6c8; --text-secondary: #8fad93; --text-dim: #5a7a5e;
    --accent-cyan: #5cb85c; --accent-green: #4cae4c; --accent-magenta: #f0ad4e;
    --accent-yellow: #f0c040; --accent-red: #d9534f; --accent-orange: #e8983a;
    --border-subtle: rgba(92,184,92,0.2); --border-glow: rgba(92,184,92,0.3);
    background: #1a2620; background-image: none;
}
body[data-theme="green"]::before { display: none; }
body[data-theme="green"] .logo { background: linear-gradient(135deg, #5cb85c, #4cae4c); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
body[data-theme="green"] .sudoku-grid { border-color: #5cb85c; box-shadow: 0 0 24px rgba(92,184,92,0.12); }
body[data-theme="green"] .cell { border-color: rgba(92,184,92,0.16); }
body[data-theme="green"] .cell.border-right,
body[data-theme="green"] .cell.border-bottom { border-color: #5cb85c; }
body[data-theme="green"] .cell.selected { border-color: #5cb85c; box-shadow: 0 0 16px rgba(92,184,92,0.35); }
body[data-theme="green"] .cell .pencil-mark { color: rgba(92,184,92,0.5); }
body[data-theme="green"] .cell.highlight-rowcol { background: rgba(92,184,92,0.08) !important; border-color: rgba(92,184,92,0.25) !important; }
body[data-theme="green"] .cell.highlight-box { background: rgba(92,184,92,0.04) !important; }
body[data-theme="green"] .cell.highlight-same-number,
body[data-theme="green"] .cell.highlight-same-number input { border-color: #f0ad4e !important; color: #f0ad4e; }
body[data-theme="green"] .num-key { border-color: rgba(92,184,92,0.3); background: rgba(92,184,92,0.05); color: #c8e6c8; }
body[data-theme="green"] .num-key:hover { background: rgba(92,184,92,0.15); border-color: #5cb85c; }
body[data-theme="green"] .num-count { color: rgba(92,184,92,0.55); }
body[data-theme="green"] .num-key.used-up { border-color: rgba(80,120,100,0.2); }
body[data-theme="green"] .delete-key { border-color: rgba(217,83,79,0.3); }
body[data-theme="green"] .timer-display,
body[data-theme="green"] .timer-label,
body[data-theme="green"] .timer-icon { color: #c8e6c8; }
body[data-theme="green"] .timer-btn { border-color: rgba(92,184,92,0.3); background: rgba(92,184,92,0.08); color: #5cb85c; }
body[data-theme="green"] .mode-card { border-color: rgba(92,184,92,0.2); background: rgba(30,44,36,0.8); }
body[data-theme="green"] .mode-card.active { border-color: #5cb85c; background: rgba(92,184,92,0.15); }
body[data-theme="green"] .mode-card.active .mode-num { color: #5cb85c; }
body[data-theme="green"] .section-heading { color: #5a7a5e; }
body[data-theme="green"] .description { color: #8fad93; }
body[data-theme="green"] .guarantee { color: #4cae4c; }

/* --- 纯黑深色主题 --- */
body[data-theme="dark"] {
    --bg-primary: #0a0a0a; --bg-panel: #141414; --bg-card: #1a1a1a;
    --bg-cell: #1a1a1a; --bg-cell-fixed: #1f1f1f;
    --text-primary: #d0d0d0; --text-secondary: #7a7a7a; --text-dim: #4a4a4a;
    --accent-cyan: #a0a0a0; --accent-green: #6abf69; --accent-magenta: #b0b0b0;
    --accent-yellow: #b0b0b0; --accent-red: #d9534f; --accent-orange: #b08050;
    --border-subtle: #2a2a2a; --border-glow: #3a3a3a;
    background: #0a0a0a; background-image: none;
}
body[data-theme="dark"]::before { display: none; }
body[data-theme="dark"] .logo { background: linear-gradient(135deg, #c0c0c0, #a0a0a0); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
body[data-theme="dark"] .sudoku-grid { border-color: #3a3a3a; box-shadow: none; }
body[data-theme="dark"] .cell { border-color: #2a2a2a; }
body[data-theme="dark"] .cell.border-right,
body[data-theme="dark"] .cell.border-bottom { border-color: #3a3a3a; }
body[data-theme="dark"] .cell.selected { border-color: #a0a0a0; box-shadow: 0 0 12px rgba(160,160,160,0.25); }
body[data-theme="dark"] .cell .pencil-mark { color: rgba(160,160,160,0.35); }
body[data-theme="dark"] .cell.highlight-rowcol { background: rgba(160,160,160,0.06) !important; border-color: rgba(160,160,160,0.2) !important; }
body[data-theme="dark"] .cell.highlight-box { background: rgba(160,160,160,0.03) !important; }
body[data-theme="dark"] .cell.highlight-same-number,
body[data-theme="dark"] .cell.highlight-same-number input { border-color: #b0b0b0 !important; color: #b0b0b0; }
body[data-theme="dark"] .num-key { border-color: #2a2a2a; background: rgba(255,255,255,0.03); color: #d0d0d0; }
body[data-theme="dark"] .num-key:hover { background: rgba(255,255,255,0.08); border-color: #5a5a5a; }
body[data-theme="dark"] .num-count { color: #5a5a5a; }
body[data-theme="dark"] .num-key.used-up { border-color: #222; }
body[data-theme="dark"] .delete-key { border-color: rgba(217,83,79,0.25); }
body[data-theme="dark"] .timer-display,
body[data-theme="dark"] .timer-label,
body[data-theme="dark"] .timer-icon { color: #d0d0d0; }
body[data-theme="dark"] .timer-btn { border-color: #2a2a2a; background: rgba(255,255,255,0.04); color: #a0a0a0; }
body[data-theme="dark"] .mode-card { border-color: #2a2a2a; background: #1a1a1a; }
body[data-theme="dark"] .mode-card.active { border-color: #5a5a5a; background: #2a2a2a; }
body[data-theme="dark"] .mode-card.active .mode-num { color: #d0d0d0; }
body[data-theme="dark"] .section-heading { color: #4a4a4a; }
body[data-theme="dark"] .description { color: #7a7a7a; }
body[data-theme="dark"] .guarantee { color: #6abf69; }

/* ==================== 桌面端隐藏移动叠加层 ==================== */
@media (min-width: 768px) {
    .mobile-topbar, .mobile-bottom-bar, .drawer-overlay, .drawer, .mobile-toast, .mobile-game-area { display: none !important; }
}

/* ==================== 检查结果弹窗 ==================== */
.modal-overlay {
    display: none; position: fixed; inset: 0; z-index: 500;
    background: rgba(0,0,0,0.55); align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-box {
    background: var(--bg-panel); border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg); max-width: 380px; width: 85vw;
    box-shadow: 0 0 40px rgba(0,0,0,0.5); position: relative;
    padding: 28px 24px 24px; text-align: center;
}
.modal-close-btn {
    position: absolute; top: 10px; right: 12px;
    width: 28px; height: 28px; border: none;
    background: rgba(255,255,255,0.05); color: var(--text-dim);
    border-radius: 50%; cursor: pointer; font-size: 1.2em;
    display: flex; align-items: center; justify-content: center;
}
.modal-close-btn:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); }

/* 弹窗内容 */
.modal-content { font-family: var(--font-body); color: var(--text-secondary); line-height: 1.6; }
.modal-content .modal-title { font-family: var(--font-display); font-size: 1em; font-weight: 700; letter-spacing: 2px; color: var(--text-primary); display: block; margin-bottom: 12px; }
.modal-content .modal-msg { font-size: 0.9em; margin-bottom: 16px; display: block; }
.modal-content .modal-ok-btn {
    padding: 10px 28px; font-family: var(--font-body); font-size: 0.85em; font-weight: 700;
    border: 1.5px solid; border-radius: var(--radius-sm); cursor: pointer;
    text-transform: uppercase; letter-spacing: 1px; margin-top: 8px;
    background: rgba(0,200,255,0.08); color: var(--accent-cyan); border-color: rgba(0,200,255,0.35);
}
.modal-content .modal-ok-btn:hover { background: rgba(0,200,255,0.16); }

/* 弹窗错误列表 */
.modal-content .modal-error-list { list-style: none; padding: 0; margin: 0 0 12px; text-align: left; }
.modal-content .modal-error-list li {
    padding: 6px 10px; margin-bottom: 4px;
    background: rgba(255,51,102,0.06); border-left: 3px solid var(--accent-red);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.82em; color: var(--text-primary);
}
.modal-content .modal-success-icon { font-size: 2.2em; text-align: center; margin-bottom: 6px; }
.modal-content .modal-success-time { font-size: 0.9em; color: var(--accent-green); font-weight: 700; display: block; margin-bottom: 16px; }