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

/* ===== CSS变量：中式古典配色 ===== */
:root {
    --bg-main: #F5F0E8;
    --bg-card: #FFFDF7;
    --bg-header: #3D2B1F;
    --color-primary: #5C3D2E;
    --color-accent: #B5451B;
    --color-accent-light: #E8845A;
    --color-gold: #C9A84C;
    --color-gold-light: #F9E4B7;
    --color-text: #2C1A0E;
    --color-text-muted: #7A5C44;
    --color-border: #D4B896;
    --color-tag-bg: #F9E4B7;
    --color-tag-border: #C9A84C;
    --color-tag-text: #6B4423;
    --color-highlight: #FFD700;
    --shadow-card: 0 2px 12px rgba(92, 61, 46, 0.10), 0 1px 3px rgba(92, 61, 46, 0.08);
    --shadow-hover: 0 6px 24px rgba(92, 61, 46, 0.18), 0 2px 8px rgba(92, 61, 46, 0.12);
    --radius-card: 12px;
    --radius-tag: 20px;
    --radius-btn: 8px;
    --font-main: 'Noto Serif SC', 'Source Han Serif CN', Georgia, serif;
    --font-mono: 'Courier New', Courier, monospace;
    --transition: 0.25s ease;
}

/* ===== 全局 ===== */
body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(201, 168, 76, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(181, 69, 27, 0.04) 0%, transparent 50%);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.7;
}

/* ===== 头部 ===== */
.site-header {
    background: var(--bg-header);
    background-image: linear-gradient(135deg, #3D2B1F 0%, #5C3D2E 50%, #3D2B1F 100%);
    color: #F5F0E8;
    padding: 28px 24px 20px;
    text-align: center;
    position: relative;
    border-bottom: 3px solid var(--color-gold);
}

.site-header::before,
.site-header::after {
    content: '❧';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gold);
    font-size: 1.4rem;
    opacity: 0.7;
}

.site-header::before {
    left: 24px;
}

.site-header::after {
    right: 24px;
}

.site-header h1 {
    font-size: clamp(1.3rem, 4vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--color-gold);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

.site-header p {
    font-size: 0.82rem;
    color: #C8B89A;
    margin-top: 6px;
    letter-spacing: 0.06em;
}

/* ===== 主容器 ===== */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 16px 48px;
}

/* ===== 八卦速查面板 ===== */
.trigram-panel {
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-gold);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    margin-bottom: 20px;
    overflow: hidden;
}

.trigram-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    cursor: pointer;
    user-select: none;
    background: linear-gradient(90deg, #FAF3E0 0%, var(--bg-card) 100%);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.trigram-panel__header.open {
    border-bottom-color: var(--color-border);
}

.trigram-panel__title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.trigram-panel__title::before {
    content: '☯';
    color: var(--color-gold);
    font-size: 1.1rem;
}

.trigram-panel__arrow {
    color: var(--color-gold);
    font-size: 0.85rem;
    transition: transform var(--transition);
}

.trigram-panel__arrow.open {
    transform: rotate(180deg);
}

.trigram-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    padding: 16px 18px;
}

.trigram-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    background: #FAF6ED;
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.trigram-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
}

.trigram-info strong {
    display: block;
    font-size: 0.88rem;
    color: var(--color-primary);
}

.trigram-info span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ===== 搜索区域 ===== */
.search-section {
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 20px;
    margin-bottom: 20px;
}

.search-row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.search-input-wrap {
    flex: 1;
    min-width: 220px;
    position: relative;
}

.search-input-wrap::before {
    content: '🔍';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 10px 14px 10px 36px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-btn);
    font-family: var(--font-main);
    font-size: 0.92rem;
    color: var(--color-text);
    background: #FDFAF4;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.15);
}

.filter-select {
    padding: 10px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-btn);
    font-family: var(--font-main);
    font-size: 0.88rem;
    color: var(--color-text);
    background: #FDFAF4;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition);
    min-width: 100px;
}

.filter-select:focus {
    border-color: var(--color-gold);
}

.btn-reset {
    padding: 10px 18px;
    background: transparent;
    border: 1.5px solid var(--color-accent);
    border-radius: var(--radius-btn);
    color: var(--color-accent);
    font-family: var(--font-main);
    font-size: 0.88rem;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.btn-reset:hover {
    background: var(--color-accent);
    color: #fff;
}

/* 标签筛选 */
.tags-filter-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tags-filter-label::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 2px;
    background: var(--color-gold);
    border-radius: 2px;
}

.tags-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-btn {
    padding: 5px 14px;
    background: var(--color-tag-bg);
    border: 1.5px solid var(--color-tag-border);
    border-radius: var(--radius-tag);
    color: var(--color-tag-text);
    font-family: var(--font-main);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.tag-btn:hover {
    background: var(--color-gold);
    border-color: var(--color-gold);
    color: #fff;
}

.tag-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* ===== 结果统计栏 ===== */
.result-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
}

.result-count {
    font-size: 0.86rem;
    color: var(--color-text-muted);
}

.result-count strong {
    color: var(--color-accent);
    font-size: 1rem;
}

/* ===== 病例列表 ===== */
.cases-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

/* ===== 病例卡片 ===== */
.case-card {
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
    cursor: pointer;
    position: relative;
}

.case-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.case-card.expanded {
    grid-column: 1 / -1;
    cursor: default;
}

.case-card__header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px 12px;
    background: linear-gradient(135deg, #FAF3E0 0%, #FDF9F0 100%);
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

.case-id {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    background: var(--color-primary);
    color: var(--color-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0;
    border: 2px solid var(--color-gold);
}

.case-meta {
    flex: 1;
    min-width: 0;
}

.case-meta__name {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.case-meta__name strong {
    color: var(--color-primary);
    font-size: 0.88rem;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 5px;
}

.case-tag {
    display: inline-block;
    padding: 2px 9px;
    background: var(--color-tag-bg);
    border: 1px solid var(--color-tag-border);
    border-radius: var(--radius-tag);
    font-size: 0.72rem;
    color: var(--color-tag-text);
}

.case-tag.highlight-tag {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.case-toggle-icon {
    flex-shrink: 0;
    color: var(--color-gold);
    font-size: 1rem;
    transition: transform var(--transition);
}

.case-card.expanded .case-toggle-icon {
    transform: rotate(180deg);
}

/* 卡片摘要区（收起时显示） */
.case-card__summary {
    padding: 12px 16px;
}

.symptoms-preview {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.symptoms-preview .keyword-highlight {
    background: var(--color-highlight);
    color: var(--color-text);
    border-radius: 2px;
    padding: 0 2px;
}

/* 卡片详情区（展开时显示） */
.case-card__detail {
    display: none;
    padding: 0 16px 20px;
    border-top: 1px dashed var(--color-border);
    margin-top: 0;
}

.case-card.expanded .case-card__detail {
    display: block;
}

.case-card.expanded .case-card__summary {
    display: none;
}

/* 详情内部区块 */
.detail-section {
    margin-top: 16px;
}

.detail-section__title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.detail-section__title::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* 症状列表 */
.symptoms-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.symptom-chip {
    display: inline-block;
    padding: 3px 10px;
    background: #F0EAD6;
    border: 1px solid #D4B896;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-text);
}

.symptom-chip .keyword-highlight {
    background: var(--color-highlight);
    color: var(--color-text);
    border-radius: 2px;
    padding: 0 2px;
}

/* 证型 & 治则 */
.tcm-info {
    background: #FAF6ED;
    border-left: 3px solid var(--color-gold);
    border-radius: 0 6px 6px 0;
    padding: 10px 14px;
    font-size: 0.85rem;
    line-height: 1.7;
}

.tcm-info p+p {
    margin-top: 4px;
}

.tcm-label {
    color: var(--color-text-muted);
    font-size: 0.78rem;
}

.tcm-value {
    color: var(--color-text);
}

.tcm-value .keyword-highlight {
    background: var(--color-highlight);
    color: var(--color-text);
    border-radius: 2px;
    padding: 0 2px;
}

/* 方药列表 */
.formula-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.formula-item {
    background: #FDFAF4;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.formula-item__code-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: linear-gradient(90deg, #F5EDD6 0%, #FDF9F0 100%);
    border-bottom: 1px solid var(--color-border);
}

.formula-code {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    background: rgba(181, 69, 27, 0.08);
    padding: 2px 10px;
    border-radius: 4px;
    border: 1px solid rgba(181, 69, 27, 0.2);
}

.formula-code .keyword-highlight {
    background: var(--color-highlight);
    color: var(--color-text);
    border-radius: 2px;
    padding: 0 2px;
}

.formula-role {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    background: #fff;
    border: 1px solid var(--color-border);
    padding: 2px 8px;
    border-radius: 20px;
}

.formula-item__body {
    padding: 10px 14px;
    font-size: 0.84rem;
    line-height: 1.75;
}

.formula-effects {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 6px;
}

.formula-meaning {
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.formula-meaning .keyword-highlight {
    background: var(--color-highlight);
    color: var(--color-text);
    border-radius: 2px;
    padding: 0 2px;
}

/* ===== 无结果提示 ===== */
.no-result {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
    grid-column: 1 / -1;
}

.no-result__icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.no-result p {
    font-size: 0.92rem;
}

/* ===== 页脚 ===== */
.site-footer {
    text-align: center;
    padding: 20px;
    color: var(--color-text-muted);
    font-size: 0.78rem;
    border-top: 1px solid var(--color-border);
    margin-top: 32px;
}

/* ===== 分割线装饰 ===== */
.divider {
    text-align: center;
    color: var(--color-gold);
    font-size: 1rem;
    letter-spacing: 0.5em;
    margin: 8px 0;
    opacity: 0.6;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-main);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {

    .site-header::before,
    .site-header::after {
        display: none;
    }

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

    .cases-list {
        grid-template-columns: 1fr;
    }

    .case-card.expanded {
        grid-column: 1;
    }

    .search-row {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-select,
    .btn-reset {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 16px 10px 40px;
    }

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

    .site-header h1 {
        font-size: 1.15rem;
    }
}