:root {
    --bg: #f7f7f6;
    --surface: #ffffff;
    --text: #1e1e1e;
    --muted: #5f6368;
    --line: #dedede;
    --link: #1a73e8;
    --conference-red: #c6262e;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Noto Sans', sans-serif;
    font-size: 18px;
    line-height: 1.7;
}

.cvpr-page {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 28px 72px;
}

.section {
    margin-top: 0;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 42px 0;
}

.section + .section {
    position: relative;
    margin-top: 0;
}

.section + .section::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    top: 0;
    width: min(100%, 760px);
    margin: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(116, 132, 156, 0), rgba(116, 132, 156, 0.52), rgba(116, 132, 156, 0));
}

.hero {
    margin-top: 24px;
    text-align: center;
}

.hero.section::before {
    display: none;
}

.bibtex-section {
    position: relative;
    margin-top: 54px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 28px;
}

.bibtex-section::before {
    content: "";
    height: 1px;
    background: linear-gradient(90deg, rgba(116, 132, 156, 0), rgba(116, 132, 156, 0.52), rgba(116, 132, 156, 0));
    margin: 0;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -27px;
    width: min(100%, 760px);
}

.paper-title {
    margin: 0 auto 16px;
    max-width: 980px;
    font-family: 'Castoro', serif;
    font-size: clamp(22px, 2.5vw, 28px);
    line-height: 1.25;
    font-weight: 400;
    position: relative;
    padding-bottom: 10px;
}

.paper-title::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    width: min(56%, 520px);
    height: 2px;
    background: linear-gradient(90deg, rgba(31, 79, 166, 0), rgba(31, 79, 166, 0.65), rgba(31, 79, 166, 0));
}

.title-emoji {
    margin-right: 0.2em;
    font-size: 0.9em;
    letter-spacing: 0.08em;
    vertical-align: -0.05em;
    opacity: 0.92;
}

.title-brand {
    font-family: 'Space Grotesk', 'Noto Sans', sans-serif;
    font-size: 1.35em;
    font-weight: 700;
    letter-spacing: 0.01em;
    white-space: nowrap;
    background: linear-gradient(105deg, #0f2f73 0%, #2f62da 32%, #7ea6ff 52%, #2e5fce 72%, #143f9c 100%);
    background-size: 260% 260%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: #2c5cc5;
    text-shadow: 0 0 20px rgba(79, 126, 224, 0.28);
    filter: saturate(1.12) contrast(1.08);
    animation: brandShimmer 5.5s ease-in-out infinite;
}

.title-sep {
    margin-right: 0.14em;
}

.title-line1,
.title-line2 {
    display: block;
    color: #222;
    white-space: nowrap;
}

.title-line2 {
    font-style: italic;
}

.title-hao {
    color: #1c3d7a;
    font-style: italic;
}

.title-tags {
    margin: 0 auto 24px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.title-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-size: 14px;
    color: #2f3b53;
    background: linear-gradient(180deg, #f7f9ff 0%, #eef3ff 100%);
    border: 1px solid #d7e2ff;
    border-radius: 999px;
}

@keyframes brandShimmer {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.paper-subtitle {
    margin: 0 auto 18px;
    max-width: 860px;
    font-family: 'Castoro', serif;
    font-size: clamp(20px, 2.2vw, 26px);
    line-height: 1.4;
    color: #34363a;
}

.authors,
.affiliations {
    margin: 0;
    font-size: 18px;
    color: var(--muted);
}

.authors {
    line-height: 1.7;
}

.conference-note {
    margin: 8px 0 0;
    font-family: 'Space Grotesk', 'Noto Sans', sans-serif;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--conference-red);
}

.affiliations {
    margin-top: 8px;
}

.author-email {
    margin: 8px 0 0;
    font-size: 15px;
    color: var(--muted);
}

.author-email a {
    color: var(--muted);
    text-decoration: none;
    border-bottom: 1px solid rgba(95,99,104,0.35);
}

.author-email a:hover {
    color: var(--link);
    border-bottom-color: var(--link);
}

.author-mark {
    font-size: 0.7em;
    vertical-align: super;
    color: #8a8f98;
    font-style: normal;
}

.links-row {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    text-decoration: none;
    color: #222;
    background: #f2f3f5;
    border: 1px solid #d0d4d9;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 9px 16px;
    min-width: 170px;
}

.link-btn:hover {
    background: #e8ebef;
}

.btn-icon {
    flex-shrink: 0;
    width: 17px;
    height: 17px;
    opacity: 0.78;
}

.section-title {
    margin: 0 0 12px;
    font-family: 'Castoro', serif;
    font-size: 32px;
    line-height: 1.25;
    font-weight: 400;
}

.subsection-title {
    margin: 0 0 10px;
    font-family: 'Noto Sans', sans-serif;
    font-size: 20px;
    line-height: 1.35;
    font-weight: 600;
}

.section-intro,
.caption,
.result-card p {
    margin: 10px 0 0;
    font-size: 16px;
    color: var(--muted);
    line-height: 1.55;
}

.abstract-section p,
.bullet-panel li,
.dataset-list li {
    margin: 0;
    font-size: 18px;
    line-height: 1.75;
}

.abstract-section {
    background: transparent;
    border: none;
    border-radius: 0;
    padding-top: 8px;
    padding-bottom: 8px;
}

.media-frame {
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: #fdfdfd;
}

.media-frame img,
.media-frame video,
.result-card video {
    display: block;
    width: 100%;
    height: auto;
}

.bullet-panel {
    margin-top: 18px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fcfcfc;
}

.method-lead {
    margin: 0 0 24px;
    font-size: 17px;
    line-height: 1.75;
    color: #3a3d42;
}

.idea-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 28px;
}

.idea-card {
    display: flex;
    gap: 14px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fcfcfc;
}

.idea-card--highlight {
    background: #f5f8ff;
    border-color: #c9d8f5;
}

.idea-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: #2c5cc5;
    background: #e8effe;
    border-radius: 50%;
    margin-top: 2px;
}

.idea-card--highlight .idea-num {
    background: #d0dcfa;
}

.idea-body {
    flex: 1;
    min-width: 0;
}

.idea-title {
    margin: 0 0 8px;
    font-family: 'Noto Sans', sans-serif;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.35;
    color: #2f62da;
}

.idea-body p {
    margin: 0;
    font-size: 15px;
    line-height: 1.68;
    color: #3e4148;
}

.method-figure {
    margin-top: 18px;
    border: none;
    border-radius: 0;
    background: transparent;
}

.method-figure img {
    border-radius: 0;
}

.teaser-frame {
    border: none;
    border-radius: 0;
    background: transparent;
}

/* Teaser video 2×2 grid (desktop) / swipe gallery (mobile) */
.teaser-grid-wrap {
    position: relative;
    border: 1px solid rgba(116, 132, 156, 0.32);
    border-radius: 10px;
    overflow: hidden;
    background: rgba(116, 132, 156, 0.18);
    cursor: pointer;
    user-select: none;
    box-shadow:
        0 3px 20px rgba(26, 79, 196, 0.08),
        0 1px 4px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.teaser-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    width: 100%;
    overflow: hidden;
}

.teaser-vid {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    min-width: 0;
    background: #000;
}

.teaser-vid.video-manual-mode,
.carousel-card video.video-manual-mode {
    background: #000;
}

.video-fallback {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 150px;
    padding: 18px;
    background: linear-gradient(160deg, #f8fbff 0%, #eef4ff 100%);
    color: #17315f;
    text-decoration: none;
    border: 1px solid rgba(47, 98, 218, 0.14);
}

.video-fallback:hover {
    background: linear-gradient(160deg, #f1f7ff 0%, #e5efff 100%);
}

.video-fallback__title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.4;
}

.video-fallback__hint {
    margin-top: 8px;
    font-size: 13px;
    line-height: 1.5;
    color: #4f6488;
}

.teaser-grid-wrap--fallback {
    cursor: default;
}

.teaser-grid-wrap--fallback .teaser-pause-icon {
    display: none;
}

.teaser-grid-wrap--fallback + .teaser-controls .teaser-speed-btn {
    opacity: 0.55;
    cursor: default;
}

.teaser-pause-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.52);
    border-radius: 50%;
    color: #fff;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s;
}

.teaser-pause-icon.visible {
    opacity: 1;
}

.teaser-pause-icon svg {
    width: 22px;
    height: 22px;
}

.teaser-controls {
    display: flex;
    justify-content: flex-end;
    margin-top: 7px;
}

.teaser-speed-btn {
    padding: 3px 9px 4px;
    background: transparent;
    color: var(--muted);
    border: 1px solid rgba(116, 132, 156, 0.38);
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    line-height: 1.5;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    user-select: none;
}

.teaser-speed-btn:hover {
    background: rgba(116, 132, 156, 0.09);
    border-color: rgba(116, 132, 156, 0.6);
    color: var(--text);
}

.teaser-speed-btn:disabled {
    background: rgba(116, 132, 156, 0.06);
    border-color: rgba(116, 132, 156, 0.26);
    color: #818792;
}

.teaser-nav {
    display: none;
}

@media (max-width: 640px) {
    .teaser-grid-wrap {
        cursor: default;
        background: #000;
    }

    .teaser-grid {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 0;
    }

    .teaser-grid::-webkit-scrollbar {
        display: none;
    }

    .teaser-vid {
        flex: 0 0 100%;
        min-width: 0;
        max-width: 100%;
        scroll-snap-align: start;
    }

    .teaser-pause-icon {
        display: none;
    }

    .teaser-nav {
        display: flex;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        z-index: 10;
        width: 28px;
        height: 28px;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.86);
        border: none;
        border-radius: 50%;
        cursor: pointer;
        color: #2a2a2a;
        box-shadow: 0 1px 6px rgba(0, 0, 0, 0.22);
        padding: 0;
        transition: background 0.12s, box-shadow 0.12s;
    }

    .teaser-nav:active {
        background: rgba(230, 230, 230, 0.95);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
    }

    .teaser-nav--prev { left: 10px; }
    .teaser-nav--next { right: 10px; }

    .teaser-nav svg {
        width: 12px;
        height: 12px;
    }
}

.method-caption {
    margin-top: 8px;
    font-size: 14px;
    color: #8a8f98;
    line-height: 1.45;
}

.bullet-panel ul,
.dataset-list {
    margin: 0;
    padding-left: 24px;
    display: grid;
    gap: 8px;
}

.results-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.result-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px;
    background: #fdfdfd;
}

/* Video carousel */
.carousel-wrap {
    margin-top: 14px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
}

.video-carousel {
    flex: 1;
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
}

.video-carousel::-webkit-scrollbar {
    display: none;
}

.carousel-card {
    flex: 0 0 calc(75% - 6px);
    scroll-snap-align: start;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: #fdfdfd;
}

.carousel-card video {
    display: block;
    width: 100%;
    height: auto;
}

.carousel-card--fallback {
    display: flex;
    flex-direction: column;
}

.carousel-card--fallback .video-fallback {
    min-height: 188px;
    border: none;
}

.carousel-label {
    margin: 0;
    padding: 8px 10px;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.4;
}

.carousel-btn {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a4fc4;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: #fff;
    box-shadow: 0 2px 8px rgba(26,79,196,0.28);
    transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
}

.carousel-btn:hover {
    background: #1340a8;
    box-shadow: 0 4px 14px rgba(26,79,196,0.38);
    transform: scale(1.07);
}

.carousel-btn:active {
    transform: scale(0.97);
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
    stroke-width: 2.8;
}

.quant-grid {
    margin-top: 22px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px 24px;
}

.quant-item {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.table-frame {
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fff;
    overflow: hidden;
}

.quant-item figcaption.caption {
    margin: 0;
}

.split-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

.bibtex {
    margin: 0;
    padding: 18px;
    border-radius: 8px;
    border: 1px solid #d8d8d8;
    background: #f6f6f6;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 14px;
    line-height: 1.5;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.footer {
    text-align: center;
    color: var(--muted);
    font-size: 15px;
}

.footer.section::before {
    display: none;
}

.references-section {
    padding-top: 24px;
    padding-bottom: 16px;
}

.references-title {
    font-size: 20px;
    margin-bottom: 10px;
}

.references-list {
    margin: 0;
    padding-left: 22px;
    display: grid;
    gap: 6px;
}

.references-list li {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}

.ref-venue {
    font-style: normal;
    color: #888;
}

.ref-link {
    margin-left: 6px;
    font-size: 13px;
    color: var(--link);
    text-decoration: none;
}

.ref-link:hover {
    text-decoration: underline;
}

.ref-sup {
    font-size: 0.72em;
    vertical-align: super;
    line-height: 0;
}

.ref-sup a {
    color: #2c5cc5;
    text-decoration: none;
}

a {
    color: var(--link);
}

@media (max-width: 980px) {
    .cvpr-page {
        padding: 0 16px 52px;
    }

    .section {
        margin-top: 0;
        padding: 30px 0;
    }

    .section + .section::before {
        top: 0;
        transform: translateX(-50%) translateY(-50%);
    }

    .bibtex-section {
        margin-top: 40px;
        padding: 20px;
    }

    .bibtex-section::before {
        top: -20px;
    }

    .results-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .quant-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .split-block {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    html,
    body {
        font-size: 17px;
    }

    .paper-title {
        font-size: 22px;
        max-width: 100%;
    }

    .conference-note {
        font-size: 14px;
        letter-spacing: 0.05em;
    }

    .title-line1,
    .title-line2 {
        display: inline;
        white-space: normal;
    }

    .title-emoji {
        font-size: 0.56em;
    }

    .title-tag {
        font-size: 13px;
    }

    .paper-subtitle {
        font-size: 20px;
    }

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

    .carousel-card {
        flex: 0 0 calc(100% - 0px);
    }

    .link-btn {
        width: 100%;
        min-width: 0;
    }

    .idea-grid {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 20px;
    }

    .idea-card {
        padding: 14px 16px;
        gap: 12px;
    }

    .idea-body p {
        font-size: 14px;
        line-height: 1.62;
    }
}