/* ========================================
   乡脉智传系统 - 古籍文物智能识别系统
   参考「中国古籍图典资源库」风格
======================================== */

/* ---------- CSS 变量定义 ---------- */
:root {
    /* 主色调 */
    --color-primary: #8B2323;        /* 中国红/棕红 */
    --color-primary-light: #B84C4C;
    --color-primary-dark: #5C1616;
    
    /* 辅助色 */
    --color-brown: #8B5A2B;          /* 古铜棕 */
    --color-brown-light: #C9A66B;
    --color-gold: #C5A258;           /* 金色 */
    --color-beige: #D4C4A8;          /* 米棕色 */
    
    /* 背景色 */
    --color-bg-main: #F5F0E6;        /* 米白主背景 */
    --color-bg-warm: #EDE4D3;        /* 暖米色 */
    --color-bg-card: #FFFFFF;
    --color-bg-section: #E8DCC8;
    
    /* 文字颜色 */
    --color-text-primary: #2C2416;
    --color-text-secondary: #5C5040;
    --color-text-muted: #8B8070;
    
    /* 边框 */
    --color-border: #D4C4A8;
    --color-border-light: #E8DCC8;
    
    /* 字体 */
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Inter', -apple-system, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-main);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.particle-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ---------- 鼠标跟随光效 ---------- */
.cursor-glow {
    position: fixed;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 35, 35, 0.06) 0%, transparent 70%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9999;
    transition: opacity 0.3s ease;
    opacity: 0;
}

.cursor-glow.visible {
    opacity: 1;
}

/* ---------- 顶部导航栏 ---------- */
.top-header {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: #fff;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-text-secondary);
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-item {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-item:hover,
.nav-item.active {
    color: var(--color-primary);
}

.nav-item:hover::after,
.nav-item.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
}

.header-link {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.header-link:hover {
    color: var(--color-primary);
}

.info-modal {
    position: fixed;
    inset: 0;
    z-index: 2500;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}

.info-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.info-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 20, 24, 0.56);
    opacity: 0;
    transition: opacity 0.28s ease;
}

.info-modal-card {
    position: relative;
    z-index: 1;
    width: min(620px, calc(100% - 24px));
    margin: 10vh auto 0;
    background: linear-gradient(135deg, #fffefb, #f5efe2);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 20px 45px rgba(0,0,0,0.3);
    padding: 18px 18px 14px;
    opacity: 0;
    transform: translateY(10px) scale(0.98);
    transition: opacity 0.28s ease, transform 0.28s ease;
}

.info-modal.is-open .info-modal-backdrop {
    opacity: 1;
}

.info-modal.is-open .info-modal-card {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.info-modal-close {
    position: absolute;
    right: 10px;
    top: 10px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-primary);
    cursor: pointer;
}

.info-modal-card h3 {
    margin: 0 36px 10px 0;
    color: var(--color-primary-dark);
    font-family: var(--font-serif);
}

#infoModalContent p {
    margin: 0 0 8px;
    color: var(--color-text-secondary);
    line-height: 1.72;
}


/* ---------- 主内容区 ---------- */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    /* padding: var(--spacing-lg); */ /* Remove or adjust global padding */
    padding-bottom: var(--spacing-xl); /* Ensure enough space at the bottom */
}

/* ---------- 英雄搜索区域 (Hero Search Section) ---------- */
.hero-search-section {
    background-image:
        linear-gradient(135deg, rgba(44, 36, 22, 0.52), rgba(44, 36, 22, 0.36)),
        url('../image/hero-background.jpeg'),
        url('../public/hero-ancient-bg.svg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    text-align: center;
    padding: 80px var(--spacing-lg); /* Increased padding */
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden; /* For potential pseudo-elements or inner shadows */
    position: relative;
}

.hero-search-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 35%, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0) 60%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-search-section h1 {
    font-family: var(--font-serif);
    font-size: 3rem; /* Larger title */
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-search-section p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.8;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.4);
}

.hero-search-section .search-box {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    width: 100%;
    max-width: 600px; /* Limit search box width */
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 5;
}

.hero-search-section .search-input {
    flex: 1;
    padding: 1rem 1.5rem; /* Larger padding */
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px; /* More rounded */
    background: rgba(255, 255, 255, 0.15); /* Semi-transparent background */
    color: white;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.hero-search-section .search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.hero-search-section .search-input:focus {
    border-color: var(--color-gold);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 0 3px rgba(197, 162, 88, 0.5);
}

.hero-search-section .search-btn {
    padding: 1rem 2rem; /* Larger button */
    border-radius: 50px;
    background: var(--color-gold);
    color: white;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 6;
    pointer-events: auto;
}

.hero-search-section .search-btn:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

.search-result-panel {
    max-width: 880px;
    margin: 1rem auto 0;
    padding: 0;
    text-align: left;
    border-radius: 12px;
    border: 1px solid rgba(212, 175, 95, 0.45);
    background: linear-gradient(165deg, rgba(28, 22, 16, 0.92) 0%, rgba(18, 14, 10, 0.96) 100%);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(8px);
    overflow: hidden;
}

.search-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(212, 175, 95, 0.25);
    background: rgba(0, 0, 0, 0.2);
}

.search-result-panel h3 {
    font-size: 1rem;
    margin: 0;
    color: #e8c97a;
    font-family: var(--font-serif);
    letter-spacing: 0.06em;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.search-result-close {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.75);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.search-result-close:hover {
    background: rgba(180, 50, 40, 0.5);
    color: #fff;
    border-color: transparent;
}

.search-result-body {
    max-height: min(52vh, 520px);
    overflow-y: auto;
    padding: 0.85rem 1rem 1rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(212, 175, 95, 0.5) transparent;
}

.search-result-body::-webkit-scrollbar {
    width: 6px;
}

.search-result-body::-webkit-scrollbar-thumb {
    background: rgba(212, 175, 95, 0.45);
    border-radius: 3px;
}

.search-result-panel p {
    font-size: 0.92rem;
    line-height: 1.75;
    margin: 0;
}

.search-result-panel .ai-answer {
    display: grid;
    gap: 0.65rem;
}

.search-result-panel .ai-section {
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    border-left: 3px solid #c9a227;
    background: rgba(255, 255, 255, 0.04);
}

.search-result-panel .ai-section--keywords {
    border-left-color: #8b7355;
    background: rgba(201, 162, 39, 0.08);
}

.search-result-panel .ai-section-title {
    margin: 0 0 0.45rem;
    font-size: 0.92rem;
    font-weight: 600;
    color: #e8c97a;
    font-family: var(--font-serif);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.search-result-panel .ai-section-title i {
    font-size: 0.8rem;
    opacity: 0.85;
}

.search-result-panel .ai-section-body {
    display: grid;
    gap: 0.4rem;
}

.search-result-panel .ai-paragraph {
    margin: 0;
    line-height: 1.8;
    color: rgba(248, 244, 236, 0.92);
    font-size: 0.9rem;
    text-align: justify;
}

.search-result-panel .ai-paragraph strong {
    color: #f0d78c;
    font-weight: 600;
}

.search-result-panel .ai-list {
    margin: 0;
    padding-left: 1.15rem;
    display: grid;
    gap: 0.35rem;
}

.search-result-panel .ai-list li {
    font-size: 0.88rem;
    line-height: 1.7;
    color: rgba(240, 236, 228, 0.9);
}

.search-result-panel .ai-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.search-result-panel .ai-kw-tag {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    font-size: 0.8rem;
    line-height: 1.4;
    color: #f5e6c8;
    background: rgba(201, 162, 39, 0.18);
    border: 1px solid rgba(201, 162, 39, 0.35);
    border-radius: 999px;
    cursor: default;
}

.search-result-panel .ai-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.25rem;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

.search-result-panel .ai-error {
    color: #f5ead8;
}

.search-result-panel .demo-error-card {
    margin: 0.5rem 0;
}

.search-result-panel.is-loading .search-result-body {
    min-height: 80px;
}

.hero-search-section .hot-tags {
    justify-content: center; /* Center the hot tags */
    margin-top: var(--spacing-md);
}

.hero-search-section .hot-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.hero-search-section .tag-item {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.9);
    padding: 0.4rem 1rem;
}

.hero-search-section .tag-item:hover {
    background: var(--color-gold);
    border-color: var(--color-gold);
    color: white;
}

/* --- General Section Styling (re-usable) --- */
.main-content > section:not(.hero-search-section) {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.main-content > section:last-child {
    margin-bottom: 0;
}


/* ---------- 热门搜索标签 ---------- */
.hot-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.hot-label {
    font-size: 0.9rem;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.hot-label i {
    color: #FF6B35;
}

.tags-list {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.tag-item {
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tag-item:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.tag-item.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ---------- 搜索区域 ---------- */
.search-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.search-box {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-primary);
}

.search-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-btn:first-of-type {
    background: var(--color-primary);
    color: white;
}

.search-btn:first-of-type:hover {
    background: var(--color-primary-dark);
}

.search-btn.advanced {
    background: var(--color-gold);
    color: white;
}

.search-btn.advanced:hover {
    background: #B8943F;
}

.search-filters {
    display: flex;
    gap: var(--spacing-md);
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.filter-item input[type="checkbox"] {
    accent-color: var(--color-primary);
}

/* ---------- 区块标题 ---------- */
.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.section-title h2 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-text-primary);
    font-weight: 500;
}

.diamond-decor {
    color: var(--color-brown-light);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
}

/* ---------- 收藏/图典网格样式 ---------- */
.collections-grid,
.atlas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Responsive grid */
    gap: var(--spacing-md);
}

.simple-carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.simple-carousel .carousel-track {
    flex: 1;
}

/* 最新古籍收录：3D 轮播 */
.simple-carousel[data-carousel="collections"] .carousel-track {
    display: block;
    position: relative;
    min-height: 340px;
    overflow: visible;
}

.simple-carousel[data-carousel="collections"] {
    padding: 6px 52px 18px;
    overflow: hidden;
}

.simple-carousel[data-carousel="collections"] .collection-item {
    position: absolute;
    top: 0;
    left: 50%;
    width: min(620px, 78%);
    transform: translateX(-50%) scale(0.8);
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: transform 0.55s ease, opacity 0.45s ease, box-shadow 0.45s ease;
}

.simple-carousel[data-carousel="collections"] .collection-item.is-active {
    transform: translateX(-50%) scale(1);
    opacity: 1;
    z-index: 4;
    pointer-events: auto;
    box-shadow: 0 14px 30px rgba(0,0,0,0.16);
}

.simple-carousel[data-carousel="collections"] .collection-item.is-prev {
    transform: translateX(calc(-50% - 330px)) scale(0.84) rotateY(16deg);
    opacity: 0.55;
    z-index: 3;
    pointer-events: auto;
}

.simple-carousel[data-carousel="collections"] .collection-item.is-next {
    transform: translateX(calc(-50% + 330px)) scale(0.84) rotateY(-16deg);
    opacity: 0.55;
    z-index: 3;
    pointer-events: auto;
}

.simple-carousel[data-carousel="collections"] .collection-item.is-off {
    opacity: 0;
    z-index: 1;
}

.latest-collections-section .carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 6px;
}

.latest-collections-section .carousel-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: none;
    background: rgba(139, 90, 43, 0.3);
    cursor: pointer;
    transition: transform 0.25s ease, background-color 0.25s ease;
    padding: 0;
}

.latest-collections-section .carousel-dot.is-active {
    background: var(--color-primary);
    transform: scale(1.2);
}

.simple-carousel[data-carousel="collections"] .carousel-btn {
    position: absolute;
    top: 46%;
    transform: translateY(-50%);
    z-index: 6;
}

.simple-carousel[data-carousel="collections"] .carousel-btn.prev {
    left: 8px;
}

.simple-carousel[data-carousel="collections"] .carousel-btn.next {
    right: 8px;
}

.simple-carousel[data-carousel="collections"] .collection-item:hover {
    box-shadow: 0 14px 30px rgba(0,0,0,0.16);
}

.simple-carousel[data-carousel="collections"] .collection-item.is-active:hover {
    transform: translateX(-50%) scale(1);
}

.simple-carousel[data-carousel="collections"] .collection-item.is-prev:hover {
    transform: translateX(calc(-50% - 330px)) scale(0.84) rotateY(16deg);
}

.simple-carousel[data-carousel="collections"] .collection-item.is-next:hover {
    transform: translateX(calc(-50% + 330px)) scale(0.84) rotateY(-16deg);
}

.collection-modal {
    position: fixed;
    inset: 0;
    z-index: 2200;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}

.collection-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.collection-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(17, 19, 22, 0.62);
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.28s ease;
}

.collection-modal-card {
    position: relative;
    z-index: 1;
    width: min(980px, calc(100% - 24px));
    margin: 5vh auto 0;
    border-radius: 14px;
    background: linear-gradient(135deg, #fffefb, #f5efe2);
    border: 1px solid var(--color-border);
    box-shadow: 0 24px 48px rgba(0,0,0,0.35);
    padding: 14px;
    opacity: 0;
    transform: translateY(12px) scale(0.985);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.collection-modal.is-open .collection-modal-backdrop {
    opacity: 1;
}

.collection-modal.is-open .collection-modal-card {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.collection-modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-primary);
    cursor: pointer;
}

.collection-modal-layout {
    display: grid;
    grid-template-columns: 40% 1fr;
    gap: 18px;
    align-items: stretch;
}

.collection-modal-image-wrap {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    background: #f4ecdd;
}

.collection-modal-image-wrap img {
    width: 100%;
    height: 100%;
    min-height: 420px;
    object-fit: cover;
    display: block;
}

.collection-modal-main h3 {
    margin: 10px 42px 12px 0;
    font-family: var(--font-serif);
    font-size: 2rem;
    color: #1f2a20;
}

.collection-modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.collection-modal-tags span {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.82rem;
    color: #1f6148;
    background: #e6f2ed;
    border: 1px solid #d1e6dc;
}

.collection-modal-main h4 {
    margin: 10px 0 6px;
    font-size: 1rem;
    color: #1f6148;
    font-family: var(--font-serif);
}

.collection-modal-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.collection-3d-btn {
    border: 1px solid #c4dacc;
    background: linear-gradient(180deg, #eef8f2, #d8ebdf);
    color: #1f6148;
    border-radius: 999px;
    padding: 7px 14px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.collection-3d-btn i {
    margin-right: 6px;
}

.collection-3d-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(31, 97, 72, 0.16);
}

.collection-3d-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.collection-modal-main p,
.collection-modal-main li {
    color: var(--color-text-secondary);
    line-height: 1.72;
    font-size: 0.92rem;
}

.collection-modal-main ul {
    margin: 0;
    padding-left: 1.1rem;
}

.model-3d-modal {
    position: fixed;
    inset: 0;
    z-index: 2300;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.26s ease, visibility 0.26s ease;
}

.model-3d-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.model-3d-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(9, 11, 15, 0.72);
    backdrop-filter: blur(2px);
}

.model-3d-card {
    position: relative;
    z-index: 1;
    width: min(1040px, calc(100% - 24px));
    margin: 4vh auto 0;
    border-radius: 14px;
    padding: 16px;
    border: 1px solid rgba(229, 214, 182, 0.6);
    background: linear-gradient(140deg, #fffdf8, #f3ead9);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.42);
}

.model-3d-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-primary);
    cursor: pointer;
}

.model-3d-card h3 {
    margin: 6px 40px 12px 4px;
    color: #233127;
    font-family: var(--font-serif);
    font-size: 1.3rem;
}

.model-3d-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 14px;
    align-items: stretch;
}

.model-viewer-stage {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #d8cbb4;
    background:
        radial-gradient(ellipse 80% 60% at 50% 15%, rgba(255, 248, 230, 0.9), transparent),
        linear-gradient(165deg, #2a241c 0%, #1a1510 42%, #0f0d0a 100%);
    box-shadow: inset 0 0 80px rgba(197, 162, 88, 0.08);
}

.model-viewer-loading {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 13, 10, 0.72);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}

.model-viewer-loading.is-visible {
    opacity: 1;
    visibility: visible;
}

.model-viewer-loading-inner {
    text-align: center;
    color: #f5ead8;
    min-width: 200px;
}

.model-viewer-loading-inner p {
    margin: 0.65rem 0 0;
    font-size: 0.88rem;
    letter-spacing: 0.06em;
}

.model-viewer-progress {
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    overflow: hidden;
}

.model-viewer-progress-fill {
    height: 100%;
    width: 0%;
    border-radius: inherit;
    background: linear-gradient(90deg, #8b5a2b, #c5a258, #e8d4a8);
    transition: width 0.25s ease-out;
}

#artifactModelViewer {
    width: 100%;
    height: min(68vh, 560px);
    border-radius: 0;
    border: none;
    background: transparent;
    --progress-bar-color: #c5a258;
    --progress-bar-height: 3px;
    opacity: 0;
    transition: opacity 0.45s ease;
}

#artifactModelViewer.is-ready {
    opacity: 1;
}

.model-viewer-toolbar {
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 3;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.model-viewer-tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    border: 1px solid rgba(197, 162, 88, 0.45);
    background: rgba(20, 16, 12, 0.72);
    color: #f0e6d2;
    font-size: 0.78rem;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.model-viewer-tool-btn:hover {
    background: rgba(139, 90, 43, 0.55);
    border-color: rgba(197, 162, 88, 0.75);
}

.model-viewer-tool-btn.is-active {
    background: rgba(139, 90, 43, 0.65);
    border-color: #c5a258;
    box-shadow: 0 0 16px rgba(197, 162, 88, 0.25);
}

.model-viewer-tool-btn i {
    font-size: 0.82rem;
}

.model-3d-info {
    border: 1px solid #ddd1bb;
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(255, 252, 245, 0.95), rgba(247, 238, 224, 0.95));
    padding: 12px;
}

.model-3d-info h4 {
    margin: 0 0 10px;
    color: #2b3a30;
    font-size: 1rem;
    font-family: var(--font-serif);
}

.model-3d-info p {
    margin: 0 0 8px;
    color: #536059;
    font-size: 0.88rem;
    line-height: 1.5;
}

.model-3d-info strong {
    color: #2f4137;
}

.model-3d-info ul {
    margin: 8px 0 0;
    padding-left: 1.1rem;
}

.model-3d-info li {
    color: #5a6660;
    font-size: 0.86rem;
    line-height: 1.6;
}

/* 热门古籍图典：并列卡片轮播 */
.simple-carousel[data-carousel="atlas"] {
    align-items: stretch;
    gap: 10px;
}

.simple-carousel[data-carousel="atlas"] .carousel-track {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 4px 2px 12px;
}

.simple-carousel[data-carousel="atlas"] .carousel-track::-webkit-scrollbar {
    display: none;
}

.simple-carousel[data-carousel="atlas"] .atlas-item {
    position: relative;
    flex: 0 0 calc((100% - (var(--spacing-md) * 2)) / 3);
    min-height: 230px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(201, 166, 107, 0.25);
    background: #101b27;
    box-shadow: 0 8px 18px rgba(0,0,0,0.2);
}

.simple-carousel[data-carousel="atlas"] .atlas-item img {
    height: 230px;
    border-bottom: none;
}

.simple-carousel[data-carousel="atlas"] .atlas-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 12px 14px 10px;
    background: linear-gradient(180deg, rgba(6, 12, 20, 0.06) 0%, rgba(6, 12, 20, 0.7) 50%, rgba(6, 12, 20, 0.95) 100%);
}

.simple-carousel[data-carousel="atlas"] .atlas-item h3 {
    margin: 0 0 5px 0;
    color: #f4e2be;
    font-size: 1rem;
    line-height: 1.25;
}

.simple-carousel[data-carousel="atlas"] .atlas-item p {
    margin: 0;
    color: rgba(237, 241, 247, 0.92);
    font-size: 0.84rem;
}

.simple-carousel[data-carousel="atlas"] .atlas-overlay span {
    display: inline-block;
    margin-top: 8px;
    color: #d7b57a;
    font-size: 0.8rem;
}

.simple-carousel[data-carousel="atlas"] .atlas-item.is-active {
    border-color: rgba(201, 166, 107, 0.85);
    box-shadow: 0 12px 24px rgba(0,0,0,0.28);
}

.atlas-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}

.atlas-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.atlas-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 20, 24, 0.62);
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.28s ease;
}

.atlas-modal-card {
    position: relative;
    z-index: 1;
    width: min(680px, calc(100% - 28px));
    margin: 8vh auto 0;
    border-radius: 14px;
    background: linear-gradient(135deg, #fffefb, #f7f1e6);
    border: 1px solid var(--color-border);
    padding: 22px 22px 18px;
    box-shadow: 0 24px 50px rgba(0,0,0,0.35);
    opacity: 0;
    transform: translateY(10px) scale(0.98);
    transition: opacity 0.28s ease, transform 0.28s ease;
}

.atlas-modal.is-open .atlas-modal-backdrop {
    opacity: 1;
}

.atlas-modal.is-open .atlas-modal-card {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.atlas-modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-primary);
    cursor: pointer;
}

.atlas-modal-card h3 {
    margin: 0 42px 12px 0;
    font-family: var(--font-serif);
    color: var(--color-primary-dark);
    font-size: 1.35rem;
}

.atlas-modal-meta {
    margin: 0 0 6px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.atlas-modal-meta span {
    color: var(--color-brown);
}

.atlas-modal-actions {
    margin: 10px 0 2px;
}

.atlas-modal-content {
    margin-top: 10px;
    color: var(--color-text-primary);
    line-height: 1.78;
    font-size: 0.95rem;
}

.carousel-btn {
    width: 38px;
    height: 38px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    color: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-btn:hover {
    background: var(--color-primary);
    color: #fff;
}

.collection-item,
.atlas-item {
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
}

.collection-item.is-hidden,
.atlas-item.is-hidden {
    display: none;
}

@media (max-width: 992px) {
    .simple-carousel[data-carousel="collections"] {
        padding: 4px 36px 14px;
    }

    .simple-carousel[data-carousel="collections"] .collection-item {
        width: min(580px, 88%);
    }

    .simple-carousel[data-carousel="collections"] .collection-item.is-prev {
        transform: translateX(calc(-50% - 230px)) scale(0.82);
    }

    .simple-carousel[data-carousel="collections"] .collection-item.is-next {
        transform: translateX(calc(-50% + 230px)) scale(0.82);
    }

    .simple-carousel[data-carousel="atlas"] .atlas-item {
        flex-basis: calc((100% - var(--spacing-md)) / 2);
    }

    .collection-modal-layout {
        grid-template-columns: 1fr;
    }

    .collection-modal-image-wrap img {
        min-height: 300px;
    }

    .model-3d-card {
        margin-top: 7vh;
    }

    .model-3d-layout {
        grid-template-columns: 1fr;
    }

    .atlas-modal-card {
        margin-top: 10vh;
    }
}

@media (max-width: 768px) {
    .simple-carousel[data-carousel="collections"] .carousel-track {
        min-height: 300px;
    }

    .simple-carousel[data-carousel="collections"] .collection-item {
        width: min(520px, 92%);
    }

    .simple-carousel[data-carousel="collections"] .collection-item.is-prev,
    .simple-carousel[data-carousel="collections"] .collection-item.is-next {
        opacity: 0;
        pointer-events: none;
    }

    .simple-carousel[data-carousel="atlas"] .atlas-item {
        flex-basis: 100%;
    }

    .collection-modal-card {
        width: calc(100% - 14px);
        margin-top: 4vh;
        padding: 10px;
    }

    .collection-modal-main h3 {
        font-size: 1.45rem;
    }

    .collection-modal-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .model-3d-card {
        width: calc(100% - 14px);
        margin-top: 6vh;
        padding: 12px;
    }

    #artifactModelViewer {
        height: 52vh;
    }

    .model-3d-info {
        padding: 10px;
    }

    .atlas-modal-card {
        width: calc(100% - 16px);
        margin-top: 6vh;
        padding: 18px 14px 14px;
    }
}

.collection-item:hover,
.atlas-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.collection-item img,
.atlas-item img {
    width: 100%;
    height: 250px; /* Fixed height for images */
    object-fit: cover;
    border-bottom: 1px solid var(--color-border);
}

.collection-item h3,
.atlas-item h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-primary-dark);
    margin: var(--spacing-sm) var(--spacing-sm) 0;
}

.collection-item p,
.atlas-item p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin: 0 var(--spacing-sm) var(--spacing-sm);
}



/* ---------- 上传卡片区 ---------- */
.upload-card-section {
    margin-bottom: var(--spacing-xl);
}

 .upload-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) calc(var(--spacing-xl) + 15px); /* 增加左右内边距 */
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08); /* 增加阴影 */
    overflow: hidden;
}

.upload-card::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid var(--color-beige); /* 内部装饰边框 */
    border-radius: var(--radius-md);
    pointer-events: none;
    z-index: 1;
}

 .upload-area {
    border: 2px dashed var(--color-border-light);
    border-radius: var(--radius-md);
    padding: calc(var(--spacing-xl) + 10px) var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--color-bg-warm);
    position: relative; /* 确保 z-index 有效 */
    z-index: 2;
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: rgba(139, 35, 35, 0.03);
}

.upload-area.drag-over {
    border-color: var(--color-primary);
    background: rgba(139, 35, 35, 0.05);
    transform: scale(1.01);
}

 .upload-icon {
    margin-bottom: var(--spacing-md);
    background: rgba(139, 90, 43, 0.08); /* 棕色系淡背景 */
    border-radius: 50%;
    width: 70px; /* 增大图标背景 */
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    margin-right: auto;
}

.upload-icon i {
    font-size: 3rem; /* 增大图标 */
    color: var(--color-brown);
}

.upload-area h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem; /* 增大标题 */
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.upload-area p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.upload-hint {
    color: var(--color-text-muted) !important;
    font-size: 0.85rem !important;
    margin-top: var(--spacing-md); /* 增加间距 */
}

/* ---------- 预览区域 ---------- */
.preview-area {
    text-align: center;
}

 .preview-image-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1); /* 增加阴影 */
}

.preview-image-wrapper img {
    max-width: 100%;
    max-height: 280px;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border-light); /* 边框颜色变浅 */
}

.remove-btn {
    position: absolute;
    top: -15px; /* 调整位置 */
    right: -15px; /* 调整位置 */
    width: 32px; /* 增大按钮 */
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid var(--color-bg-card); /* 增加边框 */
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.remove-btn:hover {
    transform: scale(1.1);
    background: var(--color-primary-dark);
}

.preview-info {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

.recognize-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 2rem;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: white;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(139, 35, 35, 0.3);
}

.recognize-btn:hover {
    transform: translateY(-3px) scale(1.02); /* 更明显的动画效果 */
    box-shadow: 0 8px 25px rgba(139, 35, 35, 0.5); /* 更强的阴影 */
}







/* ---------- 加载动画区域 ---------- */
.loading-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    position: relative;
}

.loading-section.ai-loading-active {
    min-height: 50vh;
}

.ai-loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: rgba(250, 245, 235, 0.92);
    backdrop-filter: blur(6px);
    text-align: center;
    padding: 2rem;
}

.ai-loading-overlay h2 {
    font-family: var(--font-serif, 'Noto Serif SC', serif);
    color: var(--color-primary, #8b5a2b);
    font-size: 1.5rem;
    margin: 0;
}

.ai-loading-overlay p {
    color: var(--color-text-muted, #6b5b4f);
    margin: 0;
    max-width: 28rem;
}

.ai-loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(139, 90, 43, 0.2);
    border-top-color: var(--color-primary, #8b5a2b);
    border-radius: 50%;
    animation: ai-spin 0.9s linear infinite;
}

@keyframes ai-spin {
    to { transform: rotate(360deg); }
}

/* ---------- AI 扫描动效（维度 1） ---------- */
.ai-scan-stage {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.ai-scan-hud {
    position: relative;
    padding: 1.75rem;
    background: linear-gradient(145deg, rgba(255, 252, 245, 0.95), rgba(245, 235, 220, 0.88));
    border: 1px solid rgba(139, 90, 43, 0.25);
    border-radius: var(--radius-lg, 12px);
    box-shadow:
        0 0 0 1px rgba(197, 162, 88, 0.15),
        0 20px 50px rgba(61, 50, 41, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.ai-hud-corner {
    position: absolute;
    width: 22px;
    height: 22px;
    border-color: var(--color-gold, #c5a258);
    border-style: solid;
    opacity: 0.85;
    animation: hudPulse 2s ease-in-out infinite;
}

.ai-hud-tl { top: 10px; left: 10px; border-width: 2px 0 0 2px; }
.ai-hud-tr { top: 10px; right: 10px; border-width: 2px 2px 0 0; animation-delay: 0.3s; }
.ai-hud-bl { bottom: 10px; left: 10px; border-width: 0 0 2px 2px; animation-delay: 0.6s; }
.ai-hud-br { bottom: 10px; right: 10px; border-width: 0 2px 2px 0; animation-delay: 0.9s; }

@keyframes hudPulse {
    0%, 100% { opacity: 0.5; box-shadow: 0 0 0 transparent; }
    50% { opacity: 1; box-shadow: 0 0 12px rgba(197, 162, 88, 0.45); }
}

.ai-scanner-enhanced {
    width: 100%;
    max-width: 320px;
    height: 320px;
    margin: 0 auto 1.25rem;
    border: 2px solid rgba(139, 90, 43, 0.35);
    box-shadow:
        0 0 24px rgba(197, 162, 88, 0.2),
        inset 0 0 40px rgba(139, 90, 43, 0.06);
}

.ai-scanner-enhanced img {
    filter: grayscale(60%) brightness(0.95) contrast(1.05);
    animation: scanImagePulse 2.4s ease-in-out infinite;
}

@keyframes scanImagePulse {
    0%, 100% { filter: grayscale(60%) brightness(0.95) contrast(1.05); }
    50% { filter: grayscale(30%) brightness(1.05) contrast(1.1); }
}

.ai-scan-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(197, 162, 88, 0.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(197, 162, 88, 0.12) 1px, transparent 1px);
    background-size: 18px 18px;
    pointer-events: none;
    animation: gridDrift 4s linear infinite;
    z-index: 2;
}

@keyframes gridDrift {
    from { background-position: 0 0; }
    to { background-position: 18px 18px; }
}

.scanner-line-h {
    z-index: 4;
    height: 3px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(197, 162, 88, 0.3),
        var(--color-gold, #c5a258),
        #fff,
        var(--color-gold, #c5a258),
        rgba(197, 162, 88, 0.3),
        transparent
    );
    animation: scanLineH 2.2s ease-in-out infinite;
    box-shadow: 0 0 20px var(--color-gold, #c5a258), 0 0 40px rgba(197, 162, 88, 0.4);
}

@keyframes scanLineH {
    0% { top: 0; opacity: 0.6; }
    50% { top: calc(100% - 3px); opacity: 1; }
    100% { top: 0; opacity: 0.6; }
}

.scanner-line-v {
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    z-index: 3;
    background: linear-gradient(
        180deg,
        transparent,
        rgba(139, 90, 43, 0.4),
        var(--color-primary-light, #a67c52),
        transparent
    );
    animation: scanLineV 3.1s ease-in-out infinite;
    box-shadow: 0 0 16px rgba(139, 90, 43, 0.35);
}

@keyframes scanLineV {
    0% { left: 0; opacity: 0.4; }
    50% { left: calc(100% - 3px); opacity: 0.9; }
    100% { left: 0; opacity: 0.4; }
}

.ai-scan-pulse {
    position: absolute;
    inset: 12%;
    border: 1px solid rgba(197, 162, 88, 0.35);
    border-radius: 4px;
    z-index: 1;
    animation: scanBoxPulse 2s ease-out infinite;
    pointer-events: none;
}

@keyframes scanBoxPulse {
    0% { transform: scale(0.92); opacity: 0.8; }
    70% { transform: scale(1); opacity: 0.2; }
    100% { transform: scale(1.02); opacity: 0; }
}

.ai-scan-meta {
    text-align: center;
}

.ai-scan-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.65rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: rgba(139, 90, 43, 0.08);
    border: 1px solid rgba(139, 90, 43, 0.2);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--color-primary, #8b5a2b);
    font-family: var(--font-sans, system-ui);
}

.ai-scan-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-gold, #c5a258);
    box-shadow: 0 0 10px var(--color-gold, #c5a258);
    animation: aiDotBlink 1s ease-in-out infinite;
}

@keyframes aiDotBlink {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.ai-scan-title {
    font-family: var(--font-serif, 'Noto Serif SC', serif);
    font-size: 1.35rem;
    color: var(--color-primary-dark, #6b4423);
    margin: 0 0 0.5rem;
}

.ai-scan-step {
    min-height: 1.5em;
    color: var(--color-text-muted, #6b5b4f);
    font-size: 0.92rem;
    margin: 0 0 1rem;
    animation: stepFade 0.45s ease;
}

@keyframes stepFade {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.ai-scan-progress {
    max-width: 280px;
    margin: 0 auto 0.85rem;
}

.ai-progress-fill {
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-gold), var(--color-primary-light));
    background-size: 200% 100%;
    animation: progressShimmer 1.2s linear infinite;
    transition: width 0.35s ease-out;
}

@keyframes progressShimmer {
    from { background-position: 100% 0; }
    to { background-position: -100% 0; }
}

.ai-progress-text {
    min-width: 42px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary, #8b5a2b);
    font-variant-numeric: tabular-nums;
}

.ai-scan-ticker {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    opacity: 0.55;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    font-family: ui-monospace, monospace;
    color: var(--color-brown-light, #8b7355);
}

.ai-scan-ticker span {
    padding: 0.15rem 0.45rem;
    border: 1px solid rgba(139, 90, 43, 0.15);
    border-radius: 3px;
    animation: tickerBlink 2.4s ease-in-out infinite;
}

.ai-scan-ticker span:nth-child(2) { animation-delay: 0.4s; }
.ai-scan-ticker span:nth-child(3) { animation-delay: 0.8s; }
.ai-scan-ticker span:nth-child(4) { animation-delay: 1.2s; }

@keyframes tickerBlink {
    0%, 100% { opacity: 0.35; border-color: rgba(139, 90, 43, 0.1); }
    50% { opacity: 1; border-color: rgba(197, 162, 88, 0.45); color: var(--color-primary); }
}

/* ---------- 识别结果揭示动效（维度 1） ---------- */
.result-section-reveal {
    animation: resultReveal 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes resultReveal {
    from { opacity: 0; transform: translateY(28px); filter: blur(4px); }
    to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.info-item-reveal {
    opacity: 0;
    animation: infoItemIn 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes infoItemIn {
    from { opacity: 0; transform: translateX(-12px); }
    to { opacity: 1; transform: translateX(0); }
}

.badge-glow {
    background: linear-gradient(135deg, #66bb6a, #43a047) !important;
    animation: badgeGlow 2.2s ease-in-out infinite;
}

@keyframes badgeGlow {
    0%, 100% { box-shadow: 0 2px 12px rgba(76, 175, 80, 0.35); }
    50% { box-shadow: 0 4px 22px rgba(76, 175, 80, 0.65), 0 0 30px rgba(102, 187, 106, 0.25); }
}

.highlight-text-glow {
    text-shadow: 0 0 20px rgba(197, 162, 88, 0.25);
}

.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    margin-left: 2px;
    vertical-align: text-bottom;
    background: var(--color-gold, #c5a258);
    animation: cursorBlink 0.7s step-end infinite;
}

@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.culture-tag-glow {
    opacity: 0;
    animation: tagGlowIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    box-shadow: 0 0 0 rgba(197, 162, 88, 0);
}

.culture-tag-glow:hover {
    box-shadow: 0 0 16px rgba(197, 162, 88, 0.35);
}

@keyframes tagGlowIn {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(6px);
        box-shadow: 0 0 0 rgba(197, 162, 88, 0);
    }
    60% {
        box-shadow: 0 0 18px rgba(197, 162, 88, 0.45);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
        box-shadow: 0 0 8px rgba(197, 162, 88, 0.2);
    }
}

.culture-tags-glow .culture-tag.tag-gold {
    border-color: rgba(197, 162, 88, 0.5);
    box-shadow: 0 0 12px rgba(197, 162, 88, 0.2);
}

.culture-tags-glow .culture-tag.tag-green {
    box-shadow: 0 0 12px rgba(45, 90, 90, 0.15);
}

.culture-tags-glow .culture-tag.tag-brown {
    box-shadow: 0 0 12px rgba(139, 90, 43, 0.15);
}

.recognition-flow-anchor {
    scroll-margin-top: 5.5rem;
}

.result-placeholder-section {
    padding: var(--spacing-lg) var(--spacing-md);
}

.result-placeholder-card {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px dashed var(--color-border-light, #d4c4a8);
    border-radius: var(--radius-lg, 12px);
    background: rgba(255, 252, 245, 0.6);
    color: var(--color-text-muted, #6b5b4f);
}

.result-placeholder-card i {
    font-size: 2rem;
    color: var(--color-primary, #8b5a2b);
    margin-bottom: 0.75rem;
    display: block;
}

.recognition-error {
    text-align: center;
    color: var(--color-brown, #8b5a2b);
    margin-top: 0.75rem;
    font-size: 0.9rem;
}

.recognition-error-inline {
    padding: 0.65rem 1rem;
    border-radius: var(--radius-md, 8px);
    background: rgba(139, 90, 43, 0.08);
    border: 1px solid rgba(139, 90, 43, 0.2);
}

.expandable-text {
    position: relative;
}

.expandable-text-body {
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.75;
    transition: max-height 0.35s ease;
}

.expandable-text-body.is-expanded {
    max-height: none !important;
    overflow: visible;
}

.expandable-text.text-box {
    background: rgba(255, 252, 245, 0.85);
    border: 1px solid var(--color-border-light, #e8dcc8);
    border-radius: var(--radius-md, 8px);
    padding: 0.85rem 1rem;
    font-family: var(--font-serif, 'Noto Serif SC', serif);
    font-size: 0.95rem;
}

.expandable-text.interpretation-box {
    color: var(--color-text, #3d3229);
    font-size: 0.95rem;
}

.expand-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.65rem;
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--color-primary, #8b5a2b);
    border-radius: 999px;
    background: transparent;
    color: var(--color-primary, #8b5a2b);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.expand-more-btn:hover {
    background: var(--color-primary, #8b5a2b);
    color: #fff;
}

.loading-container {
    background: var(--color-bg-warm); /* 使用暖米色背景 */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    max-width: 480px; /* 稍微增大宽度 */
    width: 100%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

 .scanner {
    position: relative;
    width: 280px; /* 增大扫描器尺寸 */
    height: 280px;
    margin: 0 auto var(--spacing-lg);
    border: 4px solid var(--color-primary-light); /* 更粗的边框，使用浅主色 */
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.scanner img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 确保图片完整显示 */
    filter: grayscale(80%) brightness(1.2); /* 增加古朴效果 */
    transition: filter 0.5s ease; /* 增加滤镜过渡 */
}

 .scanner-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px; /* 稍微加粗扫描线 */
    background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-primary-light), var(--color-gold), transparent); /* 使用金色渐变 */
    animation: scanLine 2.5s ease-in-out infinite alternate; /* 调整动画时间并增加交替方向 */
    box-shadow: 0 0 15px var(--color-gold);
}

@keyframes scanLine {
    0% { top: 0; transform: translateY(-100%); }
    50% { top: 50%; transform: translateY(-50%); }
    100% { top: 100%; transform: translateY(0%); }
}

.loading-text h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem; /* 增大标题 */
    color: var(--color-primary-dark); /* 使用深色主色 */
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.loading-text p {
    color: var(--color-text-secondary); /* 调整文字颜色 */
    font-size: 0.95rem;
}

 .loading-progress {
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-bg-main); /* 增加背景 */
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border-light);
}

.progress-bar {
    flex: 1;
    height: 10px; /* 加粗进度条 */
    background: var(--color-border-light); /* 进度条背景色 */
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary-light)); /* 渐变色 */
    border-radius: 5px;
    transition: width 0.3s ease-out;
}

#progressText {
    font-weight: 700; /* 加粗字体 */
    color: var(--color-primary); /* 使用主色 */
    min-width: 50px;
    font-family: var(--font-sans);
}

/* ---------- 结果展示区域 ---------- */
.result-section {
    animation: fadeIn 0.5s ease;
    scroll-margin-top: 5.5rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between; /* 标题和按钮左右对齐 */
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

.result-header-main {
    flex: 1;
    min-width: 200px;
}

.recognition-mode-notice {
    margin: 0.35rem 0 0;
    font-size: 0.88rem;
    color: var(--color-text-muted, #8b8070);
    line-height: 1.5;
}

.recognition-mode-notice[data-mode='LOCAL_KNOWLEDGE'] {
    color: var(--color-brown, #8b5a2b);
}

.recognition-mode-notice[data-mode='AI_OPEN_RECOGNITION'] {
    color: #7a6348;
}

.result-header h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem; /* 增大标题 */
    color: var(--color-primary-dark); /* 使用深色主色 */
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.result-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.2rem; /* 调整内边距 */
    font-size: 0.9rem;
    font-weight: 500;
    color: white;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md); /* 调整圆角 */
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px); /* 增加微弱的悬停效果 */
}

.action-btn.secondary {
    background: var(--color-bg-warm); /* 调整背景色 */
    color: var(--color-text-secondary); /* 调整文字颜色 */
    border: 1px solid var(--color-border);
}

.action-btn.secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-bg-main); /* 悬停时背景更亮 */
}

.action-btn.speaking {
    animation: pulse 0.8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 结果内容区 */
 .result-content {
    display: grid;
    grid-template-columns: 1fr 2fr; /* 调整图片和信息区域比例 */
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-image-card,
.result-info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg); /* 增加内边距 */
    box-shadow: 0 5px 15px rgba(0,0,0,0.05); /* 增加阴影 */
}

 .image-frame {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 3px solid var(--color-beige); /* 更粗的边框，使用米棕色 */
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease; /* 增加图片hover动画 */
}

.image-frame:hover img {
    transform: scale(1.05);
}

.image-info {
    margin-top: var(--spacing-sm);
    text-align: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(45deg, #A5D6A7, #66BB6A); /* 渐变背景 */
    color: white;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
    letter-spacing: 0.05em;
}

/* 结果信息 */
.info-item {
    margin-bottom: var(--spacing-md);
}

.info-item:last-child {
    margin-bottom: 0;
}

 .info-item label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-brown-light); /* 标签颜色使用浅棕色 */
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.info-item p {
    color: var(--color-text-primary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.highlight-text {
    font-family: var(--font-serif);
    font-size: 1.3rem !important; /* 显著增大高亮文字 */
    color: var(--color-primary-dark) !important; /* 使用深色主色 */
    font-weight: 700;
    letter-spacing: 0.05em;
}

.info-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); /* 响应式布局 */
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.info-item-small {
    margin-bottom: 0; /* 移除底部间距 */
}

.info-item-small label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--color-brown);
    margin-bottom: 0.25rem;
}

.info-item-small p {
    font-size: 0.85rem;
    color: var(--color-text-primary);
}

.text-box {
    background: var(--color-bg-warm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    max-height: 150px; /* 限制高度 */
    overflow-y: auto;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    font-family: var(--font-serif); /* 使用衬线字体 */
}

.book-reference {
    font-style: italic;
    color: var(--color-brown-light); /* 使用浅棕色 */
}

/* 文化标签 */
.culture-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.culture-tag {
    background: var(--color-beige);
    color: var(--color-text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
    cursor: default;
}

.culture-tag:hover {
    background: var(--color-brown-light);
    color: white;
}

.culture-tag.tag-gold {
    background: rgba(197, 162, 88, 0.15);
    color: #8B7323;
    border: 1px solid rgba(197, 162, 88, 0.3);
}

.culture-tag.tag-green {
    background: rgba(45, 90, 90, 0.15);
    color: #2D5A5A;
    border: 1px solid rgba(45, 90, 90, 0.3);
}

.culture-tag.tag-brown {
    background: rgba(139, 90, 43, 0.15);
    color: #8B5A2B;
    border: 1px solid rgba(139, 90, 43, 0.3);
}

/* ---------- 关联文物推荐 ---------- */
.related-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.related-section h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.related-scroll {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.related-scroll::-webkit-scrollbar {
    height: 6px;
}

.related-scroll::-webkit-scrollbar-track {
    background: var(--color-bg-main);
    border-radius: 3px;
}

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

.related-item {
    flex: 0 0 200px;
    background: var(--color-bg-main);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.related-item:hover {
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.related-image {
    width: 100%;
    height: 120px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-warm);
}

.related-image i {
    font-size: 2rem;
    color: var(--color-brown-light);
}

.related-image .related-cover {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.related-image.has-image .related-cover {
    display: block;
}

.related-image.has-image i {
    display: none;
}

.related-info {
    padding: var(--spacing-sm);
}

.related-info h4 {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.related-info p {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- 知识小贴士 ---------- */
.knowledge-tip {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--color-gold);
}

.tip-icon {
    width: 45px;
    height: 45px;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-gold), #B8943F);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tip-icon i {
    font-size: 1.2rem;
    color: white;
}

.tip-content h4 {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.tip-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ---------- 图表区域 ---------- */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-lg);
}

.chart-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.chart-container h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chart {
    width: 100%;
    height: 280px;
}

/* ---------- 页脚 ---------- */
.site-footer {
    background: var(--color-primary);
    color: white;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.footer-content p {
    opacity: 0.8;
    font-size: 0.9rem;
}

.copyright {
    margin-top: var(--spacing-md);
    font-size: 0.8rem !important;
    opacity: 0.6 !important;
}

/* ---------- 复制成功提示 ---------- */
.copy-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: 50px;
    font-size: 0.9rem;
    z-index: 10000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.copy-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ---------- 滚动动画 ---------- */
.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 维度3：演示兜底与错误态 ---------- */
.demo-toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    z-index: 10050;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    max-width: min(92vw, 520px);
    padding: 0.85rem 1.25rem;
    border-radius: 999px;
    background: rgba(44, 36, 22, 0.92);
    color: #f8f0e3;
    font-size: 0.92rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    border: 1px solid rgba(197, 162, 88, 0.35);
    opacity: 0;
    transform: translateX(-50%) translateY(16px);
    pointer-events: none;
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.demo-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.demo-toast--warn i {
    color: var(--color-gold, #c5a258);
}

.demo-error-card {
    max-width: 640px;
    margin: 0 auto;
    padding: 1.5rem 1.35rem;
    text-align: center;
    border-radius: var(--radius-lg, 12px);
    border: 1px solid rgba(197, 162, 88, 0.35);
    background: linear-gradient(160deg, rgba(255, 252, 245, 0.98), rgba(245, 235, 218, 0.95));
    box-shadow: 0 10px 28px rgba(92, 22, 22, 0.08);
}

.demo-error-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 0.85rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 90, 43, 0.1);
    color: var(--color-primary, #8b2323);
    font-size: 1.25rem;
}

.demo-error-title {
    margin: 0 0 0.5rem;
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-primary-dark, #5c1616);
}

.demo-error-message {
    margin: 0 0 0.45rem;
    color: var(--color-text-primary, #2c2416);
    font-size: 0.95rem;
    line-height: 1.65;
}

.demo-error-hint {
    margin: 0 0 1rem;
    color: var(--color-text-muted, #8b8070);
    font-size: 0.86rem;
    line-height: 1.6;
}

.demo-error-retry,
.demo-error-dismiss {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.demo-error-retry {
    border: 1px solid var(--color-primary, #8b2323);
    background: var(--color-primary, #8b2323);
    color: #fff;
}

.demo-error-retry:hover {
    background: var(--color-primary-dark, #5c1616);
}

.demo-error-dismiss {
    margin-left: 0.5rem;
    border: 1px solid var(--color-border, #d4c4a8);
    background: transparent;
    color: var(--color-text-secondary, #5c5040);
}

.demo-error-dismiss:hover {
    background: rgba(139, 90, 43, 0.08);
}

.demo-status-section {
    padding: var(--spacing-lg) var(--spacing-md);
}

.demo-status-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

/* ---------- 维度3：大屏/投影可读性增强 ---------- */
@media (min-width: 1400px), (min-height: 900px) {
    html {
        font-size: 17px;
    }

    .hero-search-section h1 {
        font-size: 3.35rem;
        letter-spacing: 0.04em;
    }

    .hero-search-section p {
        font-size: 1.28rem;
    }

    .hero-search-section .search-input,
    .hero-search-section .search-btn {
        font-size: 1.05rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .result-header h2 {
        font-size: 2rem;
    }

    .highlight-text,
    .highlight-text-glow {
        font-size: 1.48rem !important;
    }

    .info-item label {
        font-size: 0.98rem;
    }

    .info-item p,
    .expandable-text.text-box,
    .expandable-text.interpretation-box {
        font-size: 1rem;
        line-height: 1.85;
    }

    .search-result-panel h3 {
        font-size: 1.08rem;
    }

    .search-result-panel .ai-paragraph,
    .search-result-panel .ai-list li {
        font-size: 0.98rem;
        line-height: 1.75;
    }

    .search-result-body {
        max-height: min(52vh, 520px);
    }

    .demo-error-title {
        font-size: 1.28rem;
    }

    .demo-error-message {
        font-size: 1.02rem;
    }

    .collection-item h3,
    .atlas-overlay h3 {
        font-size: 1.15rem;
    }

    .related-info h4 {
        font-size: 1.05rem;
    }

    .related-info p {
        font-size: 0.92rem;
        line-height: 1.65;
    }
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1200px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scroll-cards {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 992px) {
    .main-nav {
        display: none;
    }
    
    .result-content {
        grid-template-columns: 1fr;
    }
    
    .category-content {
        flex-direction: column;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .carousel-card {
        flex: 0 0 calc(33.333% - 11px);
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .header-actions {
        display: none;
    }
    
    .search-box {
        flex-wrap: wrap;
    }
    
    .search-input {
        flex: 1 1 100%;
    }
    
    .search-btn {
        flex: 1;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .info-row {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .carousel-card {
        flex: 0 0 calc(50% - 8px);
    }
    
    .result-actions {
        flex-wrap: wrap;
    }
    
    .knowledge-tip {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* =====================================================
   手机端自适应补丁（768px 以下 + 小屏 480px）
===================================================== */
img, video, canvas {
    max-width: 100%;
}

html, body {
    overflow-x: hidden;
}

body {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

/* ---------- 汉堡菜单按钮 + 移动端导航 ---------- */
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-primary);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
    display: none;
    border-top: 1px solid var(--color-border-light);
    background: #fff;
    padding: 0.5rem 1rem 1rem;
}

.mobile-nav.is-open {
    display: block;
    animation: fadeIn 0.25s ease;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
}

.mobile-nav-links .nav-item {
    padding: 0.8rem 0.25rem;
    font-size: 1.02rem;
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-links .nav-item::after {
    display: none;
}

.mobile-nav-actions {
    display: flex;
    gap: 1rem;
    padding-top: 0.8rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

@media (max-width: 992px) {
    .top-header {
        position: sticky;
    }

    .header-container {
        gap: 0.6rem;
    }

    .menu-toggle {
        display: inline-flex;
        flex-shrink: 0;
    }

    /* 主导航收进汉堡菜单，避免直接 display:none 导致手机无入口 */
    .main-nav {
        display: none;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .main-content {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .main-content > section:not(.hero-search-section) {
        padding: 1.1rem 0.9rem;
        border-radius: 14px;
        margin-bottom: 1rem;
    }

    .hero-search-section {
        padding: 2.2rem 1rem 1.8rem;
        margin-bottom: 1rem;
        border-radius: 14px;
    }

    .hero-search-section h1 {
        font-size: clamp(1.6rem, 8vw, 2.1rem);
        letter-spacing: 1px;
    }

    .hero-search-section p {
        font-size: 0.95rem;
        margin-bottom: 1.2rem;
    }

    .hero-search-section .search-box {
        flex-direction: column;
        max-width: 100%;
    }

    .hero-search-section .search-input,
    .hero-search-section .search-btn {
        width: 100%;
    }

    .hero-search-section .search-btn {
        justify-content: center;
        padding: 0.9rem 1rem;
    }

    .search-result-body {
        max-height: 60vh;
    }

    .hot-tags {
        justify-content: center;
    }

    /* 上传 / 识别 */
    .upload-card {
        padding: 1rem 0.9rem;
        max-width: 100%;
    }

    .upload-card::before {
        top: 6px;
        left: 6px;
        right: 6px;
        bottom: 6px;
    }

    .upload-area {
        padding: 1.4rem 0.9rem;
    }

    .preview-image-wrapper img {
        max-height: 52vw;
    }

    .recognize-btn {
        width: 100%;
        justify-content: center;
    }

    .ai-scan-stage {
        padding: 0.75rem 0.25rem;
    }

    .ai-scanner-enhanced {
        max-width: 100%;
        height: min(68vw, 300px);
    }

    /* 结果区 */
    .result-header h2 {
        font-size: 1.3rem;
    }

    .result-actions {
        width: 100%;
    }

    .result-actions .action-btn {
        flex: 1 1 100%;
        justify-content: center;
        min-height: 44px;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .chart {
        height: 240px;
    }

    .related-item {
        flex-basis: 72%;
    }

    /* 轮播按钮不遮挡内容 */
    .simple-carousel[data-carousel="collections"] {
        padding-left: 34px;
        padding-right: 34px;
    }

    .simple-carousel[data-carousel="collections"] .carousel-btn,
    .simple-carousel[data-carousel="atlas"] .carousel-btn {
        min-width: 34px;
        min-height: 34px;
    }

    .collection-item img,
    .atlas-item img {
        height: 190px;
    }

    /* 弹窗全屏化 */
    .collection-modal-card,
    .model-3d-card,
    .atlas-modal-card,
    .info-modal-card {
        max-height: 92vh;
        max-height: 92dvh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .model-viewer-toolbar {
        position: static;
        margin-top: 10px;
    }

    #artifactModelViewer {
        height: 52vh;
        height: 52dvh;
    }

    /* 页脚 */
    .site-footer {
        padding: 2rem 1rem;
    }

    .footer-content h2 {
        font-size: 1.4rem;
    }

    /* 触屏设备关闭鼠标光效，减少干扰 */
    .cursor-glow {
        display: none;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .header-container {
        padding: 0.6rem 0.8rem;
    }

    .logo-text {
        font-size: 0.95rem;
    }

    .tags-list {
        gap: 0.45rem;
    }

    .tag-item {
        font-size: 0.8rem;
    }

    .related-item {
        flex-basis: 82%;
    }

    .collection-item img,
    .atlas-item img {
        height: 170px;
    }

    .search-result-panel .ai-section {
        padding: 0.55rem 0.6rem;
    }

    .copy-toast,
    .demo-toast {
        width: calc(100% - 24px);
        max-width: none;
        text-align: center;
        justify-content: center;
    }
}

/* 安全区适配（刘海屏） */
@supports (padding: max(0px)) {
    .top-header,
    .site-footer {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
    }
}

/* 减少动态效果（低端机 / 省电模式更流畅） */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .scanner-line,
    .scanner-line-h,
    .scanner-line-v {
        animation: none;
    }
}