.keyboard-wrapper.white-theme {
    --surface: #ffffff;
    --surface-secondary: #f3f5f8;
    --surface-page: #f8f9fa;
    --border: #d2d6dc;
    --border-strong: #9ca3af;
    --text-muted: #6b7280;
    --text-normal: #222222;
    --primary: #1d4ed8;
    --active‑ok‑bg: #b8efbc;
    --active‑ok‑border: #16a34a;
    --active‑err‑bg: #ffc8c8;
    --active‑err‑border: #dc2626;
    --card-radius: 12px;
}

.keyboard-wrapper.dark-theme {
    --surface: #242526;
    --surface-secondary: #3a3b3c;
    --surface-page: #18191a;
    --border: #444648;
    --border-strong: #686a6d;
    --text-muted: #b0b3b8;
    --text-normal: #e9e9eb;
    --primary: #4285f4;
    --active‑ok‑bg: #0f5c2e;
    --active‑ok‑border: #22c55e;
    --active‑err‑bg: #641c1c;
    --active‑err‑border: #ef4444;
    --card-radius: 12px;
}

/* 浅黄色主题 */
.keyboard-wrapper.yellow-theme {
    --surface: #fffbe8;
    --surface-secondary: #fff6d2;
    --surface-page: #fff9e3;
    --border: #e2d2a8;
    --border-strong: #c9ad6e;
    --text-muted: #8c7444;
    --text-normal: #4b3818;
    --primary: #b47b00;
    --active‑ok‑bg: #c7e298;
    --active‑ok‑border: #4d8820;
    --active‑err‑bg: #ffbcac;
    --active‑err‑border: #b93820;
    --card-radius: 12px;
}

/* 粉色主题 */
.keyboard-wrapper.pink-theme {
    --surface: #fff4f8;
    --surface-secondary: #ffe3ec;
    --surface-page: #ffeaf2;
    --border: #e8b8c8;
    --border-strong: #d894ac;
    --text-muted: #995570;
    --text-normal: #441f30;
    --primary: #c83e70;
    --active‑ok‑bg: #b9e8bc;
    --active‑ok‑border: #2f9942;
    --active‑err‑bg: #ffb4c2;
    --active‑err‑border: #b82e48;
    --card-radius: 12px;
}

* {
    box-sizing: border-box;
}

.keyboard-wrapper {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--surface-page);
    color: var(--text-normal);
    padding: 1rem;
    transition: background-color 0.3s, color 0.3s;
    border-radius: var(--card-radius);
}

.wrapper-inner {
    max-width: 920px;
    margin: 0 auto;
}

.header-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.header-bar label {
    font-weight: 500;
}

#schemeSelect, #themeSelect, #btnPause {
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    background-color: var(--surface);
    color: var(--text-normal);
}

.stat-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-around;
    padding: 10px 14px;
    background: var(--surface);
    border-radius: var(--card-radius);
    border: 1px solid var(--border);
    margin-bottom: 12px;
}

.stat-item {
    font-size: 14px;
}

.keyboard-container {
    width: 100%;
    margin: 0 auto;
    padding: clamp(0.4rem, 1.4vw, 0.6rem);
    background: var(--surface);
    border-radius: var(--card-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transition: background-color 0.3s;
}

.keyboard-grid {
    display: grid;
    justify-items: center;
    gap: clamp(0.3rem, 1.2vw, 0.5rem);
    grid-template-columns: repeat(21, minmax(0, 1fr));
}

.key-row {
    width: 100%;
    display: contents;
}

.key-wrap {
    grid-column: span 2;
    width: 100%;
    display: flex;
    justify-content: center;
}

.key-btn {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: clamp(48px, 10vw, 80px);
    height: clamp(52px, 12vw, 78px);
    border-radius: 10px;
    font-weight: 500;
    transition: all 150ms ease;
    border: 1px solid var(--border);
    overflow: hidden;
    background-color: var(--surface);
    /* 增加多层阴影，模拟实体按键层次感 */
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.12),
    0 4px 6px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
    color: var(--text-normal);
}

.key-btn:hover {
    background-color: var(--surface-secondary);
    border-color: var(--border-strong);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.14),
    0 6px 10px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

/* 按键提示状态 */
.key-btn.key-state-hint {
    animation: pulse 1.5s infinite;
}

/* 正确激活状态 */
.key-btn.key-active-ok, .key-btn.key-state-hint {
    background-color: var(--active‑ok‑bg);
    border-color: var(--active‑ok‑border);
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

/* 错误激活状态 */
.key-btn.key-active-err {
    background-color: var(--active‑err‑bg);
    border-color: var(--active‑err‑border);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.82;
        transform: scale(1.02);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.key-cap-char {
    position: absolute;
    top: 4px;
    left: 6px;
    font-size: clamp(9px, 2vw, 12px);
    color: var(--text-muted);
    font-weight: 600;
}

.key-initials {
    position: absolute;
    top: 4px;
    right: 6px;
    font-size: clamp(9px, 2vw, 13px);
    color: var(--text-muted);
}

.key-finals-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 4px;
}

.key-final-item {
    font-size: clamp(10px, 2.2vw, 15px);
    color: var(--primary);
    line-height: 1.2;
}

.legend-area {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 4px;
}

.dot-init {
    background-color: var(--text-muted);
    opacity: 0.5;
}

.dot-final {
    background-color: var(--primary);
}

.dot‑ok {
    background-color: var(--active‑ok‑border);
}

.dot‑err {
    background-color: var(--active‑err‑border);
}

.keyboard-wrapper .card-wrap {
    max-width: 220px;
    margin: 0 auto;
    width: 100%;
}

.keyboard-wrapper .mizige-card {
    position: relative;
    width: 100%;
    padding-top: 100%;
    border-radius: var(--card-radius);
    overflow: hidden;
    background: var(--surface);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    /* 默认1个字字号 */
    --hanzi-font-size: clamp(2rem, 8vw, 3.2rem);
}

.keyboard-wrapper .mizige-card.char-1 {
    --hanzi-font-size: clamp(6rem, 24vw, 9.4rem);
}

.keyboard-wrapper .mizige-card.char-2 {
    --hanzi-font-size: clamp(5rem, 20vw, 7.83rem);
}

.keyboard-wrapper .mizige-card.char-3 {
    --hanzi-font-size: clamp(4rem, 16vw, 6.27rem);
}

.keyboard-wrapper .mizige-card.char-4 {
    --hanzi-font-size: clamp(3rem, 12vw, 4.7rem);
}

.keyboard-wrapper .mizige-inner {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.keyboard-wrapper .mizige-card svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.keyboard-wrapper .hanzi-text {
    font-size: var(--hanzi-font-size);
    font-weight: bold;
    font-family: serif;
    z-index: 10;
    position: relative;
    color: var(--text-normal);
    white-space: nowrap;
}

.keyboard-wrapper .pinyin-top {
    /*font-family: monospace;*/
    font-weight: bold;
    margin-bottom: 8px;
}

.keyboard-wrapper .pinyin-top span {
    color: var(--primary);
    font-size: 2em;
}

.keyboard-wrapper .sp-key-wrap {
    display: flex;
    gap: 4px;
    justify-content: center;
    min-height: 32px;
    margin-top: 10px;
}

.keyboard-wrapper .sp-key {
    min-width: 38px;
    text-align: center;
    padding: 2px 4px;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-family: monospace;
    font-size: 2em;
    font-weight: bold;
    background-color: var(--surface-secondary);
    color: var(--text-muted);
}

.keyboard-wrapper .key-active {
    color: var(--primary);
    border: 2px dotted var(--primary);
}

.keyboard-wrapper .key-pass {
    background-color: var(--active‑ok‑bg);
    border-color: var(--active‑ok‑border);
}

.keyboard-wrapper .mizige-card.highlight-border {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.theme-switch-group {
    margin-bottom: 20px;
}

.keyboard-wrapper .svg-line {
    stroke: var(--border);
}

/** sp-juzi专用start **/


/*卡片基础样式*/
.keyboard-wrapper .exercise-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 16px 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    transition: all .22s ease;
    margin-bottom: 20px;
}

/*当前激活练习行卡片，左侧高亮竖条*/
.keyboard-wrapper .exercise-card.active-row {
    background-color: var(--surface-secondary);
    border-left: 4px solid var(--primary);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08);
}

/*单个字符容器：三层布局：全拼拼音｜汉字｜双拼按键*/
.keyboard-wrapper .char-unit {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    width: 2.2em;
    margin: 0 2px;
    cursor: help;
    position: relative;
}

/*顶层：完整汉语拼音*/
.keyboard-wrapper .char-pinyin-full {
    font-size: 12px;
    color: var(--text-muted);
    height: 18px;
    line-height: 18px;
    font-family: sans-serif;
}

/*中间层：汉字主体*/
.keyboard-wrapper .char-text {
    font-size: 26px;
    line-height: 1.4;
    color: var(--text-normal);
}

/*下层：双拼按键提示*/
.keyboard-wrapper .char-doublepy-hint {
    font-size: 14px;
    font-family: monospace;
    color: var(--text-muted);
    height: 22px;
    line-height: 22px;
}

.keyboard-wrapper .char-unit.focus {
    position: relative;
}

/*闪烁下划线光标，放在汉字底部位置*/
.keyboard-wrapper .char-unit.focus::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 22px;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background-color: var(--primary);
    animation: blinkCursor 0.8s infinite;
}

/*光标闪烁动画：显示/隐藏切换*/
@keyframes blinkCursor {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/*高亮状态：当前重点字符，例如正在输入的字*/
.keyboard-wrapper .char-unit.focus .char-text {
    color: var(--primary);
}

.keyboard-wrapper .char-unit.focus .char-doublepy-hint {
    color: var(--primary);
}

/*hover浮层tooltip，展示完整双拼编码*/
.keyboard-wrapper .char-unit:hover .char-tooltip {
    opacity: 1;
    visibility: visible;
}

.keyboard-wrapper .char-tooltip {
    position: absolute;
    bottom: calc(100% - 18px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    box-shadow: 0 3px 14px rgba(0, 0, 0, 0.15);
    padding: 4px 10px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s ease;
    color: var(--text-normal);
    pointer-events: none;
}

.keyboard-wrapper .tooltip-label {
    color: var(--text-muted);
    margin-right: 4px;
}

.keyboard-wrapper .tooltip-code {
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 1px;
}

/*预留输入对错样式，后面js使用*/
.keyboard-wrapper .char-unit.correct {
    background-color: var(--active‑ok‑bg);
    border-radius: 6px;
}

.keyboard-wrapper .char-unit.error {
    background-color: var(--active‑err‑bg);
    border-radius: 6px;
}

/*行容器，防止横向溢出*/
.keyboard-wrapper .line-container {
    overflow-x: auto;
    padding: 8px 0;
}

.keyboard-wrapper .line-container::-webkit-scrollbar {
    height: 4px;
}

.keyboard-wrapper .line-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}


.keyboard-wrapper .char-unit .sp-key {
    padding: 0px;
    border: none;
    font-size: 1em;
}

/*响应式适配*/
@media (max-width: 767px) {
    .keyboard-wrapper .char-text {
        font-size: 22px;
    }

    .keyboard-wrapper .char-unit {
        width: 2.0em;
    }
}

@media (max-width: 480px) {
    .keyboard-wrapper .char-text {
        font-size: 20px;
    }

    .keyboard-wrapper .char-pinyin-full {
        font-size: 11px;
    }

    .keyboard-wrapper .char-doublepy-hint {
        font-size: 12px;
    }
}
/** sp-juzi专用end **/