/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --blue-skies: linear-gradient(to right, rgb(86, 204, 242), rgb(47, 128, 237));
    --roseanna: linear-gradient(to right, rgb(255, 175, 189), rgb(255, 195, 160));
    /* --radar: linear-gradient(to right, rgb(167, 112, 239), rgb(207, 139, 243), rgb(253, 185, 155)); */
    /* --radar: linear-gradient(to right, rgb(252, 0, 255), rgb(0, 219, 222)); */
    --jshine: linear-gradient(to right, rgb(18, 194, 233), rgb(196, 113, 237), rgb(246, 79, 89));
    --piggy-pink: linear-gradient(to right, rgb(238, 156, 167), rgb(255, 221, 225));
    --azur-lane: linear-gradient(to right, rgb(127, 127, 213), rgb(134, 168, 231), rgb(145, 234, 228));
    --magic: linear-gradient(to right, rgb(89, 193, 115), rgb(161, 127, 224), rgb(93, 38, 193));
    --moon-purple: linear-gradient(to right, rgb(78, 84, 200), rgb(143, 148, 251));
    --slight-ocean: linear-gradient(to right, rgb(168, 192, 255), rgb(63, 43, 150));
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* Dark theme removed - only light mode supported */
/* [data-theme="dark"] { ... } */
/* @media (prefers-color-scheme: dark) { ... } */

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Fix for anchor links with fixed navbar */
section {
    scroll-margin-top: 90px; /* navbar height (70px) + extra padding (20px) */
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 60px;
}

/* Theme toggle removed - only light mode supported */

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Banner */
.banner {
    background: var(--jshine);
    color: white;
    padding: 100px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner-title {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 10px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.banner-subtitle {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 30px;
    opacity: 0.9;
}

.authors {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.authors a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.authors a:hover {
    opacity: 0.8;
}

.banner-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.link-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* 主演示视频 */
.main-demo {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.demo-video-container {
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    position: relative;
    background: var(--bg-tertiary);
}

.main-video {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.main-video.loaded {
    opacity: 1;
}

/* Video loading indicator */
.video-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.video-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-text {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.loader-progress {
    width: 200px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto;
}

.progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
}

/* TL;DR 内容 */
.tldr-content {
    background: var(--bg-secondary);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    text-align: center;
    max-width: 1200px;
    margin: 0 auto 30px auto;
}

.tldr-content p {
    font-size: 1.3rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.tldr-content i {
    color: var(--accent-primary);
    margin-right: 8px;
}

.tldr-content strong {
    color: var(--text-primary);
}

/* Abstract 区域 */
.abstract {
    padding: 40px 0;
    background: var(--bg-primary);
}

.abstract-content {
    background: var(--bg-secondary);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    text-align: center;
    max-width: 1200px;
    margin: 0 auto 30px auto;
}

.abstract-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.abstract-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.abstract-visuals {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(360px, 0.95fr);
    gap: 24px;
    align-items: stretch;
    margin-top: 22px;
}

.head-figure {
    width: 100%;
    height: 100%;
    min-height: 460px;
    object-fit: contain;
    background: white;
    border-radius: 8px;
    display: block;
}

.metric-charts {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 18px;
}

.metric-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 130px;
    gap: 16px;
    align-items: center;
    min-height: 0;
}

.chart-panel {
    position: relative;
    height: 100%;
    min-height: 220px;
    padding: 64px 14px 8px 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background:
        repeating-linear-gradient(to top, rgba(148, 163, 184, 0.2) 0 1px, transparent 1px 28px),
        #f3f4f6;
}

.chart-title {
    position: absolute;
    top: 14px;
    left: 12px;
    right: 108px;
    color: var(--text-primary);
    font-size: 0.92rem;
    font-weight: 700;
    text-align: left;
    line-height: 1.15;
}

.chart-legend {
    position: absolute;
    top: 12px;
    right: 12px;
    display: grid;
    gap: 3px;
    color: var(--text-primary);
    font-size: 0.66rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 6px;
}

.chart-legend span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.chart-legend i {
    width: 12px;
    height: 7px;
    border: 1px solid rgba(15, 23, 42, 0.5);
    display: inline-block;
}

.legend-original,
.bar.original {
    background: #4aa3df;
}

.legend-lite3r,
.bar.lite3r {
    background: #3dbb76;
}

.bar-chart {
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 26px;
    align-items: end;
}

.bar-group {
    height: 100%;
    display: grid;
    grid-template-rows: 1fr auto;
    gap: 4px;
}

.bars {
    height: 100%;
    display: flex;
    align-items: end;
    justify-content: center;
    gap: 7px;
}

.bar {
    position: relative;
    width: clamp(28px, 34%, 48px);
    height: 0;
    border: 2px solid rgba(15, 23, 42, 0.65);
    border-bottom-width: 3px;
    transition: height 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

.metric-card.bars-animated .bar {
    height: var(--bar-height);
}

.metric-card.replay-bars .bar {
    transition: none;
    height: 0;
}

.bar span {
    position: absolute;
    left: 50%;
    top: -20px;
    transform: translateX(-50%);
    color: var(--text-primary);
    font-size: 0.72rem;
    font-weight: 800;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.25s ease 0.45s;
}

.metric-card.bars-animated .bar span {
    opacity: 1;
}

.bar-label {
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 800;
    text-align: center;
}

.chart-axis {
    position: absolute;
    left: 2px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    transform-origin: center;
    color: var(--text-primary);
    font-size: 0.72rem;
    font-weight: 700;
    white-space: nowrap;
}

.metric-callout {
    color: #000;
    font-size: clamp(1.1rem, 1.9vw, 1.55rem);
    font-weight: 800;
    line-height: 1.35;
    text-align: center;
 }

/* 性能对比 */
.benchmark-chart {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.benchmark-image {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 2.5 / 1;
    object-fit: cover;
}

/* 交互式结果 */
.interactive-results {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.method {
    padding: 40px 0;
    background: var(--bg-primary);
}

.results {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.results-chart-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    max-width: 1320px;
    margin: 0 auto;
}

.result-chart-card {
    position: relative;
    min-height: 260px;
    padding: 54px 14px 28px 42px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background:
        repeating-linear-gradient(to top, rgba(148, 163, 184, 0.2) 0 1px, transparent 1px 30px),
        #fff;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.result-chart-title {
    position: absolute;
    top: 14px;
    left: 14px;
    right: 112px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.15;
    text-align: center;
}

.summary-card .result-chart-title {
    right: 14px;
}

.quality-title {
    right: 14px;
}

.quality-title.with-left-legend {
    left: 78px;
}

.result-legend {
    top: 12px;
    right: 10px;
}

.result-legend.compact {
    left: 10px;
    right: auto;
}

.result-legend.bottom {
    top: auto;
    bottom: 36px;
}

.bar.da3,
.legend-da3 {
    background: #b07ac8;
}

.results-chart-grid .bar {
    width: clamp(24px, 32%, 44px);
}

.result-chart-card.bars-animated .bar {
    height: var(--bar-height);
}

.result-chart-card.replay-bars .bar {
    transition: none;
    height: 0;
}

.result-chart-card.bars-animated .bar span {
    opacity: 1;
}

.result-bars {
    position: relative;
    z-index: 1;
    height: 100%;
    min-height: 178px;
    display: grid;
    align-items: end;
    gap: 18px;
}

.result-bars.two-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.result-bars.four-groups {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.result-bar-group {
    height: 178px;
    display: grid;
    grid-template-rows: 1fr auto;
    gap: 6px;
}

.single-bar {
    gap: 0;
}

.single-bar .bar {
    width: clamp(34px, 58%, 58px);
}

.result-callout {
    position: absolute;
    top: 36px;
    left: 54px;
    z-index: 2;
    padding: 2px 6px;
    border: 2px solid currentColor;
    border-radius: 5px;
    background: #fff6ed;
    font-size: 0.82rem;
    font-weight: 800;
}

.result-callout.right {
    top: 104px;
    left: auto;
    right: 44px;
}

.result-callout.latency {
    color: #ef4b35;
}

.result-callout.memory {
    color: #8a3fb8;
    background: #faf5ff;
}

.baseline-line {
    position: absolute;
    left: 42px;
    right: 14px;
    bottom: 107px;
    z-index: 0;
    border-top: 2px dashed #ff3b3b;
}

.summary-card .bar-label {
    font-size: 0.66rem;
    line-height: 1.15;
}

.summary-card .chart-axis {
    font-size: 0.7rem;
}

.results-caption {
    max-width: 1120px;
    margin: 24px auto 0;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    text-align: justify;
}

.ablation-caption {
    max-width: 1120px;
    margin: 24px auto 0;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    text-align: justify;
}

.component-ablation {
    padding: 40px 0;
    background: var(--bg-primary);
}

.adaptation-sensitivity {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.adaptation-figure {
    max-width: 1180px;
    margin: 0 auto 18px;
}

.adaptation-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.adaptation-caption {
    max-width: 1120px;
    margin: 24px auto 0;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    text-align: justify;
}

.ablation-chart-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    max-width: 1320px;
    margin: 0 auto;
}

.ablation-chart-card {
    position: relative;
    min-height: 330px;
    padding: 58px 18px 30px 42px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background:
        repeating-linear-gradient(to top, rgba(148, 163, 184, 0.2) 0 1px, transparent 1px 36px),
        #fff;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.ablation-chart-title {
    position: absolute;
    top: 12px;
    left: 16px;
    right: 16px;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 800;
    text-align: center;
}

.ablation-legend {
    top: 38px;
    right: 10px;
}

.legend-rot,
.bar.rot {
    background: #ee6a5f;
}

.bar.ablation-full {
    background: #58bf87;
}

.bar.ablation-sla {
    background: #f6b640;
}

.bar.ablation-no-sla {
    background: #ee6a5f;
}

.bar.ablation-original {
    background: #aebcbc;
}

.ablation-bars {
    height: 100%;
    min-height: 240px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: end;
    gap: 12px;
}

.ablation-bar-group {
    height: 240px;
    display: grid;
    grid-template-rows: 1fr 2.6em;
    gap: 8px;
}

.ablation-chart-card .bar-label {
    min-height: 2.6em;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.ablation-chart-card .bar {
    width: clamp(28px, 36%, 46px);
}

.ablation-chart-card .single-bar .bar {
    width: clamp(42px, 62%, 70px);
}

.ablation-chart-card.bars-animated .bar {
    height: var(--bar-height);
}

.ablation-chart-card.replay-bars .bar {
    transition: none;
    height: 0;
}

.ablation-chart-card.bars-animated .bar span {
    opacity: 1;
}

.ablation-chart-card .bar strong {
    position: absolute;
    left: 50%;
    top: 58%;
    transform: translate(-50%, -50%);
    padding: 2px 6px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 4px;
    background: rgba(31, 41, 55, 0.78);
    color: #fff;
    font-size: 0.8rem;
    line-height: 1.1;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.25s ease 0.45s;
}

.ablation-chart-card.bars-animated .bar strong {
    opacity: 1;
}

.method-figure {
    max-width: 1040px;
    margin: 0 auto 18px;
}

.method-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.method-caption {
    max-width: 1040px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    text-align: justify;
}

/* Main display area for interactive examples */
.scene-viewer-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px 12px;
    max-width: 1180px;
    margin: 0 auto 24px;
}

.scene-viewer-card {
    min-width: 0;
}

.scene-viewer-label {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 800;
    line-height: 1.2;
    text-align: center;
    margin-bottom: 5px;
}

.scene-viewer-label.lite-label {
    color: #dc2626;
}

.scene-viewer-window {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 12;
    border-radius: 10px;
    background: white;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.scene-viewer-iframe {
    position: absolute;
    left: 0;
    top: -16.6667%;
    width: 100%;
    height: 133.3333%;
    display: block;
    border: none;
}

.main-display-container {
    width: 100%;
    max-width: 768px;
    margin: 0 auto 30px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--bg-tertiary);
    position: relative;
    aspect-ratio: 16 / 9;
}

.main-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.main-iframe.loaded {
    opacity: 1;
}

/* Iframe loading indicator */
.iframe-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.iframe-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Thumbnail gallery */
.scene-input-title {
    max-width: 1200px;
    margin: 0 auto 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    text-align: left;
}

.scene-image-strip {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 8px;
    max-width: 1200px;
    margin: 0 auto 14px;
    position: relative;
}

.scene-image-strip img {
    width: 100%;
    height: 88px;
    object-fit: cover;
    display: block;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    background: var(--bg-tertiary);
    cursor: zoom-in;
    position: relative;
    z-index: 1;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.scene-image-strip img:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.scene-image-preview {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    background: rgba(15, 23, 42, 0.72);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.scene-image-preview.active {
    opacity: 1;
    pointer-events: auto;
}

.scene-image-preview img {
    max-width: min(92vw, 1400px);
    max-height: 88vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: var(--shadow-xl);
    background: white;
    cursor: zoom-out;
}

.thumbnail-gallery {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
    max-width: 1200px;
    margin: 0 auto;
}

.thumbnail-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    background: var(--bg-primary);
    user-select: none;
}

.thumbnail-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.thumbnail-item:active {
    transform: translateY(-1px) scale(0.98);
}

.thumbnail-item.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.thumbnail-item.loading {
    opacity: 0.6;
    pointer-events: none;
}

.thumbnail-item img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.thumbnail-item:hover img {
    transform: scale(1.05);
}

.thumbnail-label {
    padding: 8px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-primary);
    font-size: 0.8rem;
}

.thumbnail-item.active .thumbnail-label {
    color: var(--accent-primary);
}

/* Awesome DA3 Projects styles */
.projects-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    background: var(--bg-primary);
    user-select: none;
}

.project-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.project-image-container {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.project-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.project-item:hover .project-image-container img {
    transform: scale(1.05);
}

.project-description {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 15px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1.4;
    opacity: 0;
    transform: translateY(100%);
    transition: all 0.3s ease;
}

.project-item:hover .project-description {
    opacity: 1;
    transform: translateY(0);
}

.project-name {
    padding: 12px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-primary);
    font-size: 0.9rem;
}

/* Responsive styles for projects gallery */
@media (max-width: 1100px) {
    .results-chart-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ablation-chart-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .projects-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .project-image-container {
        height: 150px;
    }
    
    .project-name {
        padding: 8px;
        font-size: 0.8rem;
    }
    
    .project-description {
        font-size: 0.75rem;
        padding: 8px 10px;
    }
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 90%;
    margin: 0 auto 40px;
    padding: 0 20px;
}

.section-description a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

.section-description a:hover {
    text-decoration: underline;
    text-decoration-color: var(--accent-primary);
    opacity: 0.9;
}
.interactive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.interactive-item {
    background: var(--bg-primary);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.interactive-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.interactive-video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 比例 */
    height: 0;
    overflow: hidden;
}

.interactive-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.interactive-info {
    padding: 20px;
}

.interactive-info h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.interactive-info p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 应用场景轮播 */
.applications {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.applications-carousel {
    position: relative;
}

.carousel-container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.carousel-btn {
    background: var(--accent-gradient);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    color: white;
    font-size: 18px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.carousel-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.carousel-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.carousel-content {
    flex: 1;
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
}

.application-slide,
.analysis-slide {
    display: none;
    padding: 40px;
}

.application-slide.active,
.analysis-slide.active {
    display: block;
}

.application-video,
.analysis-video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 15px;
    margin-bottom: 30px;
    background: var(--bg-tertiary);
}

.app-video,
.analysis-video-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.app-video.loaded,
.analysis-video-player.loaded {
    opacity: 1;
}

/* Video loaders for app and analysis sections */
.app-video-loader,
.analysis-video-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.app-video-loader.hidden,
.analysis-video-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.application-info h3,
.analysis-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.application-info p,
.analysis-info p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: var(--accent-primary);
    transform: scale(1.2);
}

/* 技术分析 */
.analysis {
    padding: 40px 0;
    background: var(--bg-primary);
}


/* 引用 */
.citation {
    padding: 40px 0;
    background: var(--bg-primary);
}

.citation-box {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    max-width: 950px;
    margin: 0 auto;
}

.citation-box pre {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-primary);
}

/* 页脚 */
.footer {
    background: var(--bg-tertiary);
    padding: 40px 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .banner {
        padding: 80px 0 40px;
    }
    
    .banner-title {
        font-size: 3rem;
    }
    
    .banner-subtitle {
        font-size: 1.2rem;
    }
    
    .banner-links {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
    }
    
    .link-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
        margin-bottom: 10px;
    }
    
    .nav-links {
        display: none;
    }
    
    .main-demo,
    .abstract,
    .interactive-results,
    .method,
    .results,
    .applications,
    .analysis,
    .citation {
        padding: 30px 0;
    }
    
    .tldr-content,
    .abstract-content {
        max-width: 100%;
        padding: 20px;
    }
    
    .tldr-content p {
        font-size: 1.1rem;
    }

    .abstract-visuals {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .head-figure {
        min-height: 0;
        height: auto;
    }

    .metric-charts {
        grid-template-rows: auto;
    }

    .metric-card {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .chart-panel {
        min-height: 230px;
    }

    .metric-callout {
        text-align: center;
        font-size: 1.5rem;
    }

    .results-chart-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .ablation-chart-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .result-chart-card {
        min-height: 250px;
    }

    .ablation-chart-card {
        min-height: 300px;
    }

    .result-chart-title {
        right: 100px;
        font-size: 0.92rem;
    }
    
    .demo-video-container {
        max-width: 100%;
    }
    
    .interactive-grid {
        grid-template-columns: 1fr;
    }
    
    .carousel-container {
        flex-direction: column;
        position: relative;
    }
    
    .carousel-btn {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
    
    /* Responsive thumbnail gallery */
    .scene-image-strip {
        grid-template-columns: repeat(12, minmax(80px, 1fr));
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 8px;
    }

    .scene-image-strip img {
        height: 64px;
    }

    .thumbnail-gallery {
        grid-template-columns: repeat(8, minmax(100px, 1fr));
        gap: 10px;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    
    .thumbnail-item img {
        height: 70px;
    }
    
    .thumbnail-label {
        padding: 6px;
        font-size: 0.7rem;
    }
    
    .main-display-container {
        aspect-ratio: 4 / 3;
    }

    .scene-viewer-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
}

/* 视频占位符样式 */
.video-placeholder {
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.2rem;
    font-weight: 500;
    border: 2px dashed var(--border-color);
    border-radius: 15px;
    min-height: 200px;
}

.video-placeholder i {
    font-size: 3rem;
    margin-bottom: 10px;
    display: block;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 4px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}