/* ===== CSS Variables ===== */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f7f7f8;
            --bg-tertiary: #f2f2f2;
            --bg-card: #ffffff;
            --bg-elevated: #e7e6e6;
            --text-primary: #111111;
            --text-secondary: #595959;
            --text-tertiary: #7f7f7f;
            --accent: #db0052;
            --accent-light: #fd025c;
            --accent-subtle: rgba(219, 0, 82, 0.09);
            /* Author roster color coding */
            --aff-1: #db0052;      /* AFARI, Qianli Technology — brand red */
            --aff-2: #0052db;      /* MEGVII — blue */
            --role-eq: #8305a6;    /* * Equal contribution — theme purple */
            --role-lead: #0d9488;  /* ‡ Project lead — teal */
            --role-corr: #d97706;  /* † Corresponding author — amber */
            --gradient-accent: linear-gradient(135deg, #db0052 0%, #8305a6 55%, #0052db 100%);
            --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(219, 0, 82, 0.07), transparent 42%);
            --border-subtle: rgba(0, 0, 0, 0.09);
            --border-light: rgba(219, 0, 82, 0.32);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.09);
            --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 48px rgba(219, 0, 82, 0.1);
            --font-cn: "Microsoft YaHei", "微软雅黑", "Noto Sans SC", "PingFang SC", sans-serif;
            --font-en: "Microsoft YaHei", "微软雅黑", "Noto Sans SC", Arial, sans-serif;
            --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
            --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
        }

        ::selection {
            background: rgba(219, 0, 82, 0.18);
            color: #111111;
        }

        .container {
            max-width: 1080px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4 {
            font-family: var(--font-en);
            font-weight: 600;
            letter-spacing: 0;
        }

        /* ===== Navigation ===== */
        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 0;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(40px) saturate(180%);
            -webkit-backdrop-filter: blur(40px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: all 0.4s var(--ease-out-expo);
        }

        nav .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo img {
            height: 28px;
            width: auto;
            display: block;
            filter: none;
        }

        .nav-links {
            display: flex;
            gap: 36px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 13px;
            font-weight: 400;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 1px;
            background: var(--accent-light);
            transition: width 0.3s var(--ease-out-expo);
        }

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

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

        /* ===== Hero Section ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 100px 24px 80px;
            position: relative;
            overflow: hidden;
            background-color: #f7f7f8;
            background-image: url("../img/background/behavior-world-gen-bg-v2.jpg");
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: min(1180px, 100%);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: rgba(231, 230, 230, 0.58);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            backdrop-filter: blur(6px);
        }

        .team-logo {
            width: 20px;
            height: 20px;
            object-fit: contain;
            flex: 0 0 auto;
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: linear-gradient(135deg, #34c759, #30d158);
            border-radius: 50%;
        }

        .hero-team {
            margin-top: 26px;
            opacity: 0;
            transform: translateY(20px);
            animation: heroFadeIn 0.9s var(--ease-out-expo) 0.6s forwards;
        }

        .hero h1 {
            font-size: clamp(28px, 8vw, 104px);
            font-weight: 700;
            letter-spacing: 0;
            line-height: 1.05;
            margin-bottom: 20px;
            white-space: nowrap;
            color: #111111;
            opacity: 0;
            transform: translateY(30px);
            animation: heroFadeIn 0.9s var(--ease-out-expo) 0.2s forwards;
        }

        .hero .subtitle {
            font-size: clamp(22px, 4vw, 32px);
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 16px;
            opacity: 0;
            transform: translateY(30px);
            animation: heroFadeIn 0.9s var(--ease-out-expo) 0.35s forwards;
        }

        .hero .tagline {
            font-size: 17px;
            color: #444444;
            max-width: none;
            margin: 0 auto;
            line-height: 1.7;
            white-space: nowrap;
            opacity: 0;
            transform: translateY(30px);
            animation: heroFadeIn 0.9s var(--ease-out-expo) 0.5s forwards;
        }

        .hero-cta {
            margin-top: 24px;
            display: flex;
            justify-content: center;
            gap: 14px;
            opacity: 0;
            transform: translateY(30px);
            animation: heroFadeIn 0.9s var(--ease-out-expo) 0.65s forwards;
        }

        .hero-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-height: 52px;
            padding: 10px 22px;
            background: rgba(231, 230, 230, 0.58);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            color: var(--text-secondary);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            text-shadow: none;
            box-shadow: none;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
            cursor: pointer;
            font-family: inherit;
        }

        .hero-cta .btn .cta-icon {
            width: 24px;
            height: 24px;
            flex: 0 0 auto;
        }

        .hero-cta .report-link .arxiv-icon {
            width: 25px;
            height: 25px;
            object-fit: contain;
        }

        .hero-cta .btn:hover {
            color: var(--text-primary);
            border-color: var(--border-light);
            background: rgba(231, 230, 230, 0.78);
            text-shadow: none;
            box-shadow: none;
            transform: translateY(-1px);
        }

        /* ===== Film Preview Modal ===== */
        body.film-modal-open {
            overflow: hidden;
        }

        .film-modal {
            position: fixed;
            inset: 0;
            z-index: 2000;
            display: grid;
            place-items: center;
            padding: 28px;
        }

        .film-modal[hidden] {
            display: none;
        }

        .film-modal-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .film-modal-content {
            position: relative;
            width: min(1200px, 92vw);
            max-height: 88vh;
            z-index: 1;
            background: #000;
            border-radius: 10px;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
            overflow: visible;
        }

        .film-modal video {
            display: block;
            width: 100%;
            max-height: 88vh;
            border-radius: 10px;
            background: #000;
        }

        .film-modal-close {
            position: absolute;
            top: -18px;
            right: -18px;
            z-index: 2;
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            color: #fff;
            background: rgba(20, 20, 20, 0.9);
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .film-modal-close:hover {
            background: var(--accent);
            transform: scale(1.06);
        }

        .film-modal-close:focus-visible,
        .film-preview-trigger:focus-visible {
            outline: 3px solid rgba(253, 2, 92, 0.4);
            outline-offset: 3px;
        }

        /* ===== Authors & Affiliations ===== */
        /* The "AFARI World Model Team" badge doubles as the expand/collapse toggle. */
        button.hero-badge {
            cursor: pointer;
            font-family: inherit;
            font-size: 13px;
            font-weight: 500;
            transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
        }

        button.hero-badge:hover {
            color: var(--text-primary);
            border-color: var(--border-light);
        }

        .authors-chevron {
            margin-left: 2px;
            transition: transform 0.35s var(--ease-out-expo);
        }

        .authors-toggle[aria-expanded="true"] .authors-chevron {
            transform: rotate(180deg);
        }

        .authors-panel {
            display: grid;
            grid-template-rows: 1fr;
            opacity: 1;
            transition: grid-template-rows 0.45s var(--ease-out-expo), opacity 0.3s ease;
        }

        .authors-panel.is-collapsed {
            grid-template-rows: 0fr;
            opacity: 0;
        }

        .authors-panel-inner {
            overflow: hidden;
            min-height: 0;
            padding-top: 28px;
        }

        .author-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px 16px;
            max-width: 980px;
            margin: 0 auto;
            line-height: 1.3;
        }

        .author {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.005em;
        }

        .author sup {
            font-size: 0.72em;
            font-weight: 500;
            color: var(--text-secondary);
            vertical-align: super;
            margin-left: 2px;
            letter-spacing: 0.05em;
        }

        .author sup .role {
            color: var(--accent);
            font-weight: 600;
        }

        /* Color-coded affiliation numbers & role markers (author list + legends) */
        #authors-panel .a1 { color: var(--aff-1); }
        #authors-panel .a2 { color: var(--aff-2); }
        #authors-panel .sep { color: var(--text-tertiary); font-weight: 400; }
        #authors-panel .r-eq { color: var(--role-eq); font-weight: 700; }
        #authors-panel .r-lead { color: var(--role-lead); font-weight: 700; }
        #authors-panel .r-corr { color: var(--role-corr); font-weight: 700; }

        .affiliation-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 6px 26px;
            max-width: 760px;
            margin: 22px auto 0;
            line-height: 1.5;
        }

        .affiliation {
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .affiliation sup {
            font-size: 0.72em;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 3px;
            vertical-align: super;
        }

        .author-notes {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 6px 26px;
            margin: 13px auto 0;
        }

        .author-note {
            font-size: 12.5px;
            color: var(--text-secondary);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .author-note sup {
            font-size: 1em;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 4px;
            vertical-align: super;
        }

        @media (max-width: 640px) {
            .author {
                font-size: 15px;
            }

            .affiliation {
                font-size: 13px;
            }

            .author-list {
                gap: 6px 16px;
            }

            .affiliation-list,
            .author-notes {
                gap: 5px 14px;
            }
        }

       

        @keyframes heroFadeIn {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Sections ===== */
        section {
            padding: 100px 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .section-header h2 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== Intro Section ===== */
        .intro {
            background-color: #ffffff;
            background-image: url("../img/background/abstract-bg.jpg");
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .abstract-section {
            padding: 72px 0 96px;
        }

        .abstract-container {
            max-width: 1240px;
        }

        .abstract-card {
            background: rgba(247, 247, 248, 0.9);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--border-subtle);
            border-top: 4px solid var(--accent);
            border-radius: 4px;
            box-shadow: var(--shadow-sm);
            padding: 28px 38px 34px;
        }

        .abstract-card h2 {
            color: var(--text-primary);
            font-size: 32px;
            line-height: 1.2;
            margin-bottom: 28px;
            text-align: center;
        }

        .abstract-card h2::after {
            content: "";
            display: block;
            width: 44px;
            height: 3px;
            margin: 14px auto 0;
            background: var(--accent);
        }

        .abstract-card p {
            color: #404040;
            font-size: 16px;
            line-height: 1.8;
            text-align: justify;
        }

        .abstract-card strong {
            color: var(--accent);
            font-weight: 700;
        }

        .intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 28px;
            padding: 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .intro-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
        }

        .intro-card h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .intro-card p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 680px;
            margin: 0 auto;
        }

        .intro-visual {
            margin-top: 40px;
            display: flex;
            justify-content: center;
            gap: 12px;
        }

        .intro-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            opacity: 0.6;
        }

        /* ===== Core Pillars ===== */
        .pillars {
            background: var(--bg-primary);
        }

        .framework-overview {
            background-color: #f2f2f2;
            background-image: url("../img/background/framework-overview-bg.jpg");
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
            padding: 88px 0 104px;
        }

        .framework-container {
            max-width: 1280px;
        }

        .framework-title {
            color: #111111;
            font-size: 32px;
            line-height: 1.2;
            margin-bottom: 28px;
            text-align: center;
        }

        .framework-title::after {
            content: "";
            display: block;
            width: 44px;
            height: 3px;
            margin: 14px auto 0;
            background: var(--accent);
        }

        .framework-figure {
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            border-radius: 4px;
            box-shadow: var(--shadow-sm);
        }

        .framework-figure img {
            display: block;
            width: 100%;
            height: auto;
        }

        .pillars-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        @media (max-width: 900px) {
            .pillars-grid {
                grid-template-columns: 1fr;
            }
        }

        .pillar-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: 24px;
            padding: 40px 32px;
            transition: all 0.5s var(--ease-out-expo);
            position: relative;
            overflow: hidden;
        }

        .pillar-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--gradient-glow);
            opacity: 0;
            transition: opacity 0.5s ease;
        }

        .pillar-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-lg);
        }

        .pillar-card:hover::before {
            opacity: 1;
        }

        .pillar-number {
            font-family: var(--font-en);
            font-size: 14px;
            font-weight: 500;
            color: var(--accent);
            margin-bottom: 20px;
            letter-spacing: 0.05em;
        }

        .pillar-card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 14px;
            position: relative;
        }

        .pillar-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            position: relative;
        }

        .pillar-icon {
            width: 48px;
            height: 48px;
            background: var(--accent-subtle);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }

        .pillar-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--accent-light);
            fill: none;
            stroke-width: 1.5;
        }

        /* ===== 30-Second AR Rollout Results ===== */
        .rollout-results {
            background-color: #f6f6f8;
            background-image:
                radial-gradient(900px circle at 88% 8%, rgba(219, 0, 82, 0.075), transparent 62%),
                radial-gradient(800px circle at 8% 92%, rgba(79, 70, 229, 0.07), transparent 62%);
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .rollout-container {
            max-width: 1240px;
        }

        .rollout-results .section-header {
            margin-bottom: 28px;
        }

        .world-simulators-header {
            margin-bottom: 28px;
        }

        .world-simulator-tabs {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            max-width: 760px;
            margin: 0 auto 38px;
            padding: 5px;
            gap: 5px;
            background: rgba(255, 255, 255, 0.72);
            border: 1px solid rgba(255, 255, 255, 0.92);
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .world-simulator-tab {
            min-height: 48px;
            padding: 12px 18px;
            border: 1px solid transparent;
            border-radius: 5px;
            background: transparent;
            color: var(--text-secondary);
            font: 600 14px/1.3 var(--font-en);
            cursor: pointer;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .world-simulator-tab:hover {
            color: var(--accent);
        }

        .world-simulator-tab.is-active {
            color: #ffffff;
            background: var(--accent);
            border-color: var(--accent);
            box-shadow: 0 6px 16px rgba(219, 0, 82, 0.18);
        }

        .world-simulator-tab:focus-visible {
            outline: 3px solid rgba(219, 0, 82, 0.2);
            outline-offset: 2px;
        }

        .world-simulator-panel[hidden] {
            display: none;
        }

        .gaussian-splatting-placeholder {
            min-height: 420px;
            padding: 48px 24px;
            background: rgba(255, 255, 255, 0.76);
            border: 1px solid rgba(255, 255, 255, 0.92);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .gaussian-splatting-placeholder h2 {
            color: var(--text-primary);
            font-size: 24px;
            font-weight: 500;
            text-align: center;
            margin-bottom: 28px;
        }

        .gaussian-splatting-showcase {
            padding: 18px;
            background: rgba(255, 255, 255, 0.76);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
        }

        .gaussian-splatting-tabs {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 10px;
            margin-bottom: 18px;
        }

        .gaussian-splatting-tab {
            min-height: 44px;
            padding: 10px 14px;
            border: 1px solid var(--border-subtle);
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.86);
            color: var(--text-secondary);
            font: 600 13px/1.2 var(--font-en);
            cursor: pointer;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .gaussian-splatting-tab:hover {
            color: var(--accent);
            border-color: var(--border-light);
            transform: translateY(-1px);
        }

        .gaussian-splatting-tab.is-active {
            color: #ffffff;
            background: var(--accent);
            border-color: var(--accent);
        }

        .gaussian-splatting-tab:focus-visible {
            outline: 3px solid rgba(219, 0, 82, 0.22);
            outline-offset: 2px;
        }

        .gaussian-splatting-player {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #000000;
            border-radius: 5px;
        }

        .gaussian-splatting-player video {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .rollout-results .rollout-section-label {
            color: #111111;
            font-size: 32px;
            line-height: 1.2;
            letter-spacing: 0;
            text-transform: none;
        }

        .rollout-results .rollout-section-label::after {
            content: "";
            display: block;
            width: 44px;
            height: 3px;
            margin: 14px auto 0;
            background: var(--accent);
        }

        .rollout-results .section-header h2 {
            font-size: 24px;
            font-weight: 500;
            margin-bottom: 0;
        }

        .world-framework-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 20px;
        }

        .world-framework-item {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 360px;
            padding: 18px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.82);
            border: 1px solid rgba(255, 255, 255, 0.92);
            border-radius: 8px;
            box-shadow: var(--shadow-md);
            transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
        }

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

        .world-framework-item img {
            display: block;
            width: 100%;
            height: 100%;
            max-height: 360px;
            object-fit: contain;
        }

        .rollout-results-header {
            margin-top: 40px;
        }

        .rollout-showcase {
            padding: 18px;
            background: rgba(255, 255, 255, 0.76);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .rollout-tabs {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-bottom: 18px;
        }

        .ar-rollout-tabs {
            grid-template-columns: repeat(4, minmax(0, 1fr));
        }

        .long-horizon-tabs {
            grid-template-columns: repeat(5, minmax(0, 1fr));
        }

        .rollout-tab {
            min-height: 44px;
            padding: 10px 14px;
            border: 1px solid var(--border-subtle);
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.86);
            color: var(--text-secondary);
            font: 600 13px/1.2 var(--font-en);
            cursor: pointer;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .rollout-tab:hover {
            color: var(--accent);
            border-color: var(--border-light);
            transform: translateY(-1px);
        }

        .rollout-tab.is-active {
            color: #ffffff;
            background: var(--accent);
            border-color: var(--accent);
        }

        .rollout-tab:focus-visible {
            outline: 3px solid rgba(219, 0, 82, 0.22);
            outline-offset: 2px;
        }

        .rollout-player {
            overflow: hidden;
            aspect-ratio: 20 / 3;
            background: #000000;
            border-radius: 5px;
        }

        .rollout-player video {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .ar-rollout-player {
            aspect-ratio: 16 / 9;
        }

        .long-horizon-showcase .rollout-player {
            aspect-ratio: 960 / 721;
        }

        .trajectory-editing-showcase .rollout-player {
            aspect-ratio: 1920 / 721;
        }

        .trajectory-comparison-labels {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 12px;
            margin-bottom: 10px;
        }

        .trajectory-comparison-labels div {
            display: flex;
            align-items: baseline;
            justify-content: center;
            gap: 8px;
            padding: 9px 12px;
            border: 1px solid var(--border-subtle);
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.82);
            font-family: var(--font-en);
            text-align: center;
        }

        .trajectory-comparison-labels span {
            color: var(--text-secondary);
            font-size: 12px;
        }

        .trajectory-comparison-labels strong {
            color: var(--accent);
            font-size: 14px;
        }

        .ar-rollout-player img {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: contain;
            background: #000000;
        }

        .scene-extrapolation-list {
            display: grid;
            gap: 18px;
        }

        .scene-extrapolation-item {
            padding: 18px;
            background: rgba(255, 255, 255, 0.76);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .scene-extrapolation-item figcaption {
            margin-bottom: 12px;
            color: var(--text-primary);
            font: 600 14px/1.2 var(--font-en);
        }

        .style-transfer-header,
        .animal-rollout-header,
        .lidar-generation-header {
            margin-top: 40px;
        }

        .style-transfer-showcase,
        .animal-rollout-showcase,
        .lidar-generation-showcase {
            padding: 18px;
            background: rgba(255, 255, 255, 0.76);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .animal-rollout-layout {
            display: grid;
            grid-template-columns: 92px minmax(0, 1fr);
            gap: 12px;
            align-items: stretch;
        }

        .animal-row-labels {
            display: grid;
            grid-template-rows: repeat(4, 1fr);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            border-radius: 5px;
            background: rgba(255, 255, 255, 0.82);
        }

        .animal-row-labels span {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px;
            color: var(--text-primary);
            font: 600 13px/1.2 var(--font-en);
            text-align: center;
        }

        .animal-row-labels span + span {
            border-top: 1px solid var(--border-subtle);
        }

        .style-transfer-player,
        .animal-rollout-player {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #000000;
            border-radius: 5px;
        }

        .style-transfer-player {
            aspect-ratio: 45 / 17;
        }

        .fog-transfer-showcase {
            margin-top: 18px;
        }

        .fog-transfer-player {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #000000;
            border-radius: 5px;
        }

        .style-transfer-player video,
        .fog-transfer-player video,
        .animal-rollout-player video {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .weather-timeline {
            --weather-progress: 0%;
            margin-top: 18px;
            padding: 12px 8px 4px;
        }

        .weather-progress {
            position: relative;
            height: 4px;
            margin: 0 calc(100% / 14);
            border-radius: 999px;
            background: rgba(94, 108, 132, 0.18);
        }

        .weather-progress-fill {
            position: absolute;
            inset: 0 auto 0 0;
            width: var(--weather-progress);
            border-radius: inherit;
            background: linear-gradient(90deg, #8fc9ff 0%, #8298e8 52%, #756bb1 100%);
        }

        .weather-progress-marker {
            position: absolute;
            top: 50%;
            left: var(--weather-progress);
            width: 13px;
            height: 13px;
            border: 3px solid #ffffff;
            border-radius: 50%;
            background: #607de0;
            box-shadow: 0 2px 8px rgba(47, 69, 142, 0.4);
            transform: translate(-50%, -50%);
        }

        .weather-stages {
            display: grid;
            grid-template-columns: repeat(7, minmax(0, 1fr));
            gap: 6px;
            margin-top: 12px;
        }

        .weather-stage {
            min-width: 0;
            padding: 7px 4px;
            border: 1px solid transparent;
            border-radius: 999px;
            color: var(--text-secondary);
            background: transparent;
            font: 500 12px/1.2 var(--font-en);
            cursor: pointer;
            transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease;
        }

        .weather-stage:hover {
            color: var(--text-primary);
            background: rgba(96, 125, 224, 0.08);
        }

        .weather-stage.is-active {
            color: #405ebf;
            border-color: rgba(96, 125, 224, 0.22);
            background: rgba(96, 125, 224, 0.12);
            font-weight: 700;
            transform: translateY(-1px);
        }

        .weather-stage:focus-visible {
            outline: 2px solid #607de0;
            outline-offset: 2px;
        }

        .fog-density-timeline {
            --fog-progress: 0%;
            margin-top: 16px;
            padding: 0 8px 4px;
        }

        .fog-comparison-key {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 16px;
        }

        .fog-comparison-key span {
            padding: 6px 11px;
            border: 1px solid rgba(100, 116, 139, 0.16);
            border-radius: 999px;
            color: var(--text-secondary);
            background: rgba(248, 250, 252, 0.82);
            font: 500 11px/1.2 var(--font-en);
        }

        .fog-comparison-key strong {
            margin-right: 4px;
            color: var(--text-primary);
            font-weight: 700;
        }

        .fog-density-heading {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin-bottom: 9px;
            color: var(--text-primary);
            font: 600 12px/1.2 var(--font-en);
        }

        .fog-density-value {
            color: #64748b;
            font-size: 13px;
            font-variant-numeric: tabular-nums;
        }

        .fog-density-track {
            position: relative;
            display: block;
            width: 100%;
            height: 8px;
            padding: 0;
            overflow: visible;
            border: 0;
            border-radius: 999px;
            background: linear-gradient(90deg, #dbe4ed 0%, #cbd5df 34%, #aab5c0 67%, #7f8a96 100%);
            cursor: pointer;
        }

        .fog-density-fill {
            position: absolute;
            inset: 0 auto 0 0;
            width: var(--fog-progress);
            border-radius: inherit;
            background: linear-gradient(90deg, rgba(245, 248, 250, 0.75), #b6c0ca 62%, #697581 100%);
            box-shadow: 0 0 10px rgba(133, 146, 158, 0.28);
        }

        .fog-density-marker {
            position: absolute;
            top: 50%;
            left: var(--fog-progress);
            width: 15px;
            height: 15px;
            border: 3px solid #ffffff;
            border-radius: 50%;
            background: #748290;
            box-shadow: 0 2px 8px rgba(51, 65, 85, 0.34);
            transform: translate(-50%, -50%);
        }

        .fog-density-track:focus-visible {
            outline: 2px solid #748290;
            outline-offset: 4px;
        }

        .fog-density-scale {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            margin-top: 9px;
            color: var(--text-secondary);
            font: 500 10px/1.2 var(--font-en);
        }

        .fog-density-scale span:nth-child(2),
        .fog-density-scale span:nth-child(3) {
            text-align: center;
        }

        .fog-density-scale span:last-child {
            text-align: right;
        }

        .lidar-generation-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 14px;
        }

        .lidar-generation-grid video {
            display: block;
            width: 100%;
            aspect-ratio: 28 / 9;
            object-fit: contain;
            background: #000000;
            border-radius: 5px;
        }

        @media (max-width: 640px) {
            .rollout-showcase {
                padding: 10px;
            }

            .long-horizon-tabs {
                grid-template-columns: repeat(5, minmax(74px, 1fr));
                overflow-x: auto;
                padding-bottom: 4px;
            }

            .trajectory-comparison-labels div {
                flex-direction: column;
                align-items: center;
                gap: 3px;
            }

            .gaussian-splatting-placeholder {
                padding: 28px 12px;
            }

            .gaussian-splatting-showcase {
                padding: 10px;
            }

            .gaussian-splatting-tabs {
                grid-template-columns: repeat(4, minmax(74px, 1fr));
                overflow-x: auto;
                padding-bottom: 4px;
            }

            .style-transfer-showcase,
            .animal-rollout-showcase,
            .lidar-generation-showcase {
                padding: 10px;
            }

            .weather-timeline {
                margin-top: 12px;
                padding-inline: 0;
            }

            .weather-stages {
                gap: 2px;
            }

            .weather-stage {
                padding: 6px 1px;
                font-size: 9px;
            }

            .fog-density-timeline {
                padding-inline: 0;
            }

            .fog-comparison-key {
                gap: 5px;
                margin-bottom: 13px;
            }

            .fog-comparison-key span {
                padding: 5px 8px;
                font-size: 9px;
            }

            .animal-rollout-layout {
                grid-template-columns: 68px minmax(0, 1fr);
                gap: 7px;
            }

            .animal-row-labels span {
                padding: 4px;
                font-size: 10px;
            }

            .world-framework-grid,
            .lidar-generation-grid {
                grid-template-columns: 1fr;
            }

            .world-framework-item {
                min-height: 0;
            }

            .world-simulator-tabs {
                grid-template-columns: 1fr;
            }

            .world-simulator-tab {
                min-height: 44px;
                font-size: 13px;
            }

            .rollout-tabs {
                grid-template-columns: repeat(3, minmax(74px, 1fr));
                overflow-x: auto;
                padding-bottom: 4px;
            }

            .ar-rollout-tabs {
                grid-template-columns: repeat(4, minmax(74px, 1fr));
            }

            .scene-extrapolation-item {
                padding: 10px;
            }
        }

        /* ===== BehaviorFlow Section ===== */
        .behavior-flow {
            min-height: 520px;
            background-color: #f7f7f8;
            background-image:
                radial-gradient(840px circle at 10% 90%, rgba(219, 92, 0, 0.075), transparent 62%),
                radial-gradient(780px circle at 90% 10%, rgba(219, 0, 82, 0.065), transparent 62%);
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .behavior-flow-title {
            color: #111111;
            font-size: 32px;
            line-height: 1.2;
            text-align: center;
        }

        .behavior-flow-title::after {
            content: "";
            display: block;
            width: 44px;
            height: 3px;
            margin: 14px auto 0;
            background: var(--accent);
        }

        .behavior-flow-group {
            margin-top: 40px;
        }

        .behavior-flow-group h3 {
            margin-bottom: 18px;
            color: var(--text-primary);
            font-size: 22px;
            font-weight: 500;
        }

        .behavior-flow-description {
            margin: -8px 0 18px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .behavior-flow-video-list {
            display: grid;
            gap: 18px;
        }

        .behavior-flow-video-card {
            padding: 18px;
            background: rgba(255, 255, 255, 0.78);
            border: 1px solid rgba(255, 255, 255, 0.92);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .behavior-flow-player {
            overflow: hidden;
            aspect-ratio: 32 / 9;
            background: #000000;
            border-radius: 5px;
        }

        .behavior-flow-player video {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .behavior-flow-variant {
            margin-top: 14px;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.55;
        }

        .behavior-flow-variant strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .behavior-flow {
                min-height: 360px;
            }

            .behavior-flow-title {
                font-size: 28px;
            }

            .behavior-flow-video-card {
                padding: 10px;
            }
        }

        /* ===== Quantitative Results Section ===== */
        .quantitative-results {
            background-color: #f7f7f8;
            background-image:
                radial-gradient(880px circle at 12% 4%, rgba(219, 0, 82, 0.07), transparent 62%),
                radial-gradient(760px circle at 92% 96%, rgba(0, 82, 219, 0.06), transparent 62%);
            /* 若后续准备了专属背景图，把下面这行替换上面的 background-image 即可：
               background-image: url("../img/background/quantitative-results-bg.jpg"); */
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
            padding: 88px 0 104px;
        }

        .qr-container {
            max-width: 1360px;
        }

        .qr-title {
            color: #111111;
            font-size: 32px;
            line-height: 1.2;
            text-align: center;
        }

        .qr-title::after {
            content: "";
            display: block;
            width: 44px;
            height: 3px;
            margin: 14px auto 0;
            background: var(--accent);
        }

        .qr-intro {
            max-width: 880px;
            margin: 24px auto 0;
            color: #404040;
            font-size: 15px;
            line-height: 1.8;
            text-align: center;
        }

        .qr-intro strong {
            color: var(--accent);
            font-weight: 700;
        }

        .qr-legend {
            display: block;
            margin-top: 8px;
            color: var(--text-tertiary);
            font-size: 13px;
        }

        .qr-legend .qr-best {
            color: var(--text-secondary);
        }

        .qr-legend .qr-delta {
            margin-left: 0;
        }

        .qr-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 26px;
            margin-top: 44px;
            align-items: start;
        }

        .qr-column {
            display: flex;
            flex-direction: column;
            gap: 22px;
            min-width: 0;
        }

        .qr-column-head {
            text-align: center;
        }

        .qr-column-tag {
            display: inline-block;
            padding: 8px 20px;
            background: var(--accent);
            border-radius: 50px;
            box-shadow: 0 6px 16px rgba(219, 0, 82, 0.18);
            color: #ffffff;
            font: 600 14px/1.3 var(--font-en);
            letter-spacing: 0.03em;
        }

        .qr-column-head p {
            margin-top: 10px;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.6;
        }

        .qr-card {
            display: flex;
            flex-direction: column;
            padding: 22px 22px 18px;
            background: rgba(255, 255, 255, 0.78);
            border: 1px solid rgba(255, 255, 255, 0.92);
            border-top: 3px solid var(--accent);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            min-width: 0;
        }

        .qr-card-head {
            margin-bottom: 16px;
        }

        .qr-card-index {
            display: block;
            margin-bottom: 6px;
            color: var(--accent);
            font: 600 11px/1.2 var(--font-en);
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }

        .qr-card-head h3 {
            color: var(--text-primary);
            font-size: 21px;
            font-weight: 600;
            line-height: 1.25;
        }

        .qr-card-head p {
            margin-top: 8px;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.65;
        }

        .qr-inline-range {
            font-family: var(--font-en);
            font-weight: 600;
            color: var(--text-primary);
        }

        .qr-table-scroll {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .qr-table {
            /* ↓↓↓ 就是调这个：第一列（Method / Range）的固定宽度，
               剩下的宽度由 6 个数值列平均分。
               调大 = 数值区变窄并整体右移；调小 = 数值区变宽，
               但小于 158px 时 "Hydra-MDP-V8192-W-EP" 会折成两行。 */
            --qr-method-col: 168px;
            width: 100%;
            table-layout: fixed;
            border-collapse: collapse;
            font-family: var(--font-en);
            font-size: 12.5px;
            font-variant-numeric: tabular-nums;
            color: var(--text-primary);
        }

        /* 低分场景表第一列是 Range，内容短得多，想让它更紧凑就单独调小这个值；
           保持和上面一致（168px）则四张表的列网格完全对齐。 */
        .qr-table-lowscore {
            --qr-method-col: 168px;
        }

        .qr-table thead th:first-child {
            width: var(--qr-method-col);
        }

        .qr-table thead th {
            padding: 0 4px 7px;
            border-top: 2px solid rgba(17, 17, 17, 0.82);
            border-bottom: 1px solid rgba(17, 17, 17, 0.5);
            color: var(--text-secondary);
            font-size: 11.5px;
            font-weight: 600;
            letter-spacing: 0.02em;
            text-align: center;
            white-space: nowrap;
        }

        .qr-table thead th:first-child {
            padding-top: 0;
        }

        .qr-table thead th abbr {
            text-decoration: none;
            border-bottom: none;
            cursor: help;
        }

        .qr-table thead th.qr-col-method,
        .qr-table thead th.qr-col-range {
            text-align: left;
            padding-left: 2px;
        }

        .qr-table tbody th {
            padding: 6px 10px 6px 2px;
            color: var(--text-primary);
            font-size: 12.5px;
            font-weight: 500;
            text-align: left;
            line-height: 1.35;
        }

        .qr-table tbody td {
            padding: 6px 4px;
            text-align: center;
            white-space: nowrap;
            color: var(--text-secondary);
        }

        .qr-table tbody tr + tr th,
        .qr-table tbody tr + tr td {
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .qr-table tbody tr.qr-rule-after th,
        .qr-table tbody tr.qr-rule-after td {
            border-bottom: 1px solid rgba(17, 17, 17, 0.32);
        }

        .qr-table tbody tr:last-child th,
        .qr-table tbody tr:last-child td {
            border-bottom: 2px solid rgba(17, 17, 17, 0.82);
        }

        .qr-venue {
            display: inline-block;
            margin-left: 5px;
            color: var(--text-tertiary);
            font-size: 10.5px;
            font-weight: 400;
            white-space: nowrap;
        }

        .qr-sub {
            font-size: 10.5px;
            vertical-align: -0.15em;
            letter-spacing: 0.01em;
        }

        .qr-best {
            color: var(--text-primary);
            font-weight: 700;
        }

        .qr-second {
            text-decoration: underline;
            text-decoration-thickness: 1px;
            text-underline-offset: 2.5px;
            text-decoration-color: rgba(17, 17, 17, 0.42);
        }

        .qr-row-baseline th,
        .qr-row-baseline td {
            border-top: 1px solid rgba(17, 17, 17, 0.32) !important;
        }

        .qr-row-ours {
            background: var(--accent-subtle);
        }

        .qr-row-ours th,
        .qr-row-ours td {
            border-top: 1px solid rgba(17, 17, 17, 0.32) !important;
        }

        .qr-row-ours th {
            color: var(--accent);
            font-weight: 700;
        }

        .qr-row-ours .qr-best,
        .qr-row-ours td {
            color: var(--text-primary);
        }

        .qr-delta {
            margin-left: 4px;
            color: var(--accent);
            font-size: 10.5px;
            font-weight: 600;
            letter-spacing: 0;
        }

        .qr-delta-block {
            display: block;
            margin-left: 0;
            margin-top: 1px;
            line-height: 1.2;
        }

        .qr-delta-flat {
            color: var(--text-tertiary);
        }

        .qr-group-row th {
            padding: 9px 2px 6px;
            border-top: 1px solid rgba(17, 17, 17, 0.32);
            color: var(--text-primary);
            font-size: 12.5px;
            font-weight: 700;
            text-align: left;
        }

        .qr-group-row-ours th {
            color: var(--accent);
        }

        .qr-table-lowscore tbody th {
            white-space: nowrap;
        }

        .qr-note {
            margin-top: 12px;
            color: var(--text-tertiary);
            font-size: 11.5px;
            line-height: 1.6;
        }

        .qr-note sup {
            color: var(--accent);
        }

        /* 两列布局下窗口偏窄时数值列会挤到 ~51px，行内的 +0.2 增量会溢出，
           这里把它挪到数字下面一行（和低分场景表一样的处理） */
        @media (max-width: 1240px) and (min-width: 1121px) {
            .qr-delta {
                display: block;
                margin-left: 0;
                margin-top: 1px;
                line-height: 1.2;
            }
        }

        @media (max-width: 1120px) {
            .qr-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }
        }

        @media (max-width: 768px) {
            .quantitative-results {
                padding: 72px 0 80px;
            }

            .qr-title {
                font-size: 28px;
            }

            .qr-intro {
                font-size: 14px;
                text-align: left;
            }

            .qr-card {
                padding: 16px 14px 14px;
            }

            .qr-card-head h3 {
                font-size: 19px;
            }

            .qr-table {
                /* 窄屏改回按内容自适应，避免固定列宽把方法名挤成多行 */
                table-layout: auto;
                font-size: 11.5px;
            }

            .qr-table tbody th {
                font-size: 11.5px;
                padding-right: 6px;
            }

            .qr-table thead th {
                font-size: 10.5px;
                padding-left: 2px;
                padding-right: 2px;
            }

            .qr-table tbody td {
                padding: 5px 2px;
            }

            .qr-venue {
                display: block;
                margin-left: 0;
            }
        }

        @media (max-width: 430px) {
            .qr-table,
            .qr-table tbody th {
                font-size: 10.5px;
            }

            .qr-table tbody th {
                padding-right: 4px;
            }

            .qr-table tbody td {
                padding: 5px 1px;
            }

            .qr-delta {
                font-size: 9.5px;
            }
        }


        /* ===== Architecture Section ===== */
        .architecture {
            background: var(--bg-secondary);
        }

        .arch-container {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 28px;
            padding: 56px;
            position: relative;
            overflow: hidden;
        }

        .arch-flow {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .arch-block {
            padding: 28px 36px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: 18px;
            text-align: center;
            transition: all 0.4s var(--ease-out-expo);
            min-width: 160px;
        }

        .arch-block:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .arch-block.input { border-top: 3px solid #34c759; }
        .arch-block.process { border-top: 3px solid var(--accent); }
        .arch-block.output { border-top: 3px solid #ff9f0a; }

        .arch-block h4 {
            font-size: 11px;
            font-weight: 600;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 10px;
        }

        .arch-block p {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .arch-arrow {
            font-size: 20px;
            color: var(--text-tertiary);
        }

        .arch-note {
            margin-top: 44px;
            padding: 24px 32px;
            background: var(--bg-tertiary);
            border-radius: 16px;
            text-align: center;
            border: 1px solid var(--border-subtle);
        }

        .arch-note p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== Data Section ===== */
        .data {
            background-color: var(--bg-primary);
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .data-grid {
display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 32px;
            align-items: start;
        }

        @media (max-width: 800px) {
            .data-grid {
                grid-template-columns: 1fr;
            }
        }

        .camera-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: 24px;
            padding: 40px;
            text-align: center;
        }

        .camera-visual {
            position: relative;
            width: 220px;
            height: 220px;
            margin: 0 auto 28px;
        }

        .camera-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            background: var(--gradient-accent);
            border-radius: 50%;
            box-shadow: 0 0 40px rgba(10, 132, 255, 0.4);
        }

        .camera-point {
            position: absolute;
            width: 16px;
            height: 16px;
            background: linear-gradient(135deg, #34c759, #30d158);
            border-radius: 50%;
            border: 3px solid var(--bg-tertiary);
            box-shadow: 0 0 12px rgba(52, 199, 89, 0.4);
        }

        .camera-point.front { top: 8%; left: 50%; transform: translateX(-50%); }
        .camera-point.front-left { top: 22%; left: 12%; }
        .camera-point.front-right { top: 22%; right: 12%; }
        .camera-point.side-left { top: 50%; left: 2%; transform: translateY(-50%); }
        .camera-point.side-right { top: 50%; right: 2%; transform: translateY(-50%); }
        .camera-point.rear-left { bottom: 22%; left: 12%; }
        .camera-point.rear-right { bottom: 22%; right: 12%; }

        .camera-label {
            font-size: 11px;
            color: var(--text-tertiary);
            position: absolute;
        }

        .camera-label.front { top: 2%; left: 50%; transform: translateX(-50%); }
        .camera-label.front-left { top: 16%; left: 6%; }
        .camera-label.front-right { top: 16%; right: 6%; }
        .camera-label.side-left { top: 50%; left: -4%; transform: translateY(-50%); }
        .camera-label.side-right { top: 50%; right: -4%; transform: translateY(-50%); }
        .camera-label.rear-left { bottom: 16%; left: 6%; }
        .camera-label.rear-right { bottom: 16%; right: 6%; }

        .camera-desc {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .stats-container {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .stat-row {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: 16px;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: all 0.3s ease;
        }

        .stat-row:hover {
            border-color: var(--border-light);
            transform: translateX(4px);
        }

        .stat-label {
            min-width: 140px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .stat-bar {
            flex: 1;
            height: 8px;
            background: var(--bg-elevated);
            border-radius: 4px;
            overflow: hidden;
        }

        .stat-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 1.2s var(--ease-out-expo);
        }

        .stat-fill.green { background: linear-gradient(90deg, #34c759, #30d158); }
        .stat-fill.blue { background: linear-gradient(90deg, #0052db, #477de0); }
        .stat-fill.orange { background: linear-gradient(90deg, #ff9f0a, #ffb340); }
        .stat-fill.red { background: linear-gradient(90deg, #ff453a, #ff6961); }

        .stat-value {
            min-width: 50px;
            text-align: right;
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-en);
        }

        /* ===== Demo Section ===== */
        .demos {
            background: var(--bg-secondary);
        }

        .demo-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        @media (max-width: 768px) {
            .demo-grid {
                grid-template-columns: 1fr;
            }
        }

        .demo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 6px;
            overflow: hidden;
            transition: all 0.5s var(--ease-out-expo);
        }

        .demo-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-light);
        }

        .demo-video {
            aspect-ratio: 16/9;
            background: var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            cursor: pointer;
            overflow: hidden;
        }

        .demo-video::after {
            content: '';
            position: absolute;
            inset: 0;
            border-bottom: 1px solid var(--border-subtle);
        }

        .video-placeholder {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 14px;
            color: var(--text-tertiary);
            transition: all 0.3s ease;
        }

        .demo-card:hover .video-placeholder {
            color: var(--text-secondary);
        }

        .play-btn {
            width: 56px;
            height: 56px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.4s var(--ease-out-expo);
        }

        .demo-card:hover .play-btn {
            background: var(--accent);
            border-color: var(--accent);
            transform: scale(1.1);
        }

        .play-btn svg {
            width: 20px;
            height: 20px;
            fill: var(--text-secondary);
            margin-left: 2px;
            transition: fill 0.3s ease;
        }

        .demo-card:hover .play-btn svg {
            fill: white;
        }

        .video-hint {
            font-size: 12px;
        }

        .demo-info {
            padding: 28px;
        }

        .demo-tag {
            display: inline-block;
            padding: 5px 10px;
            background: var(--accent-subtle);
            color: var(--accent-light);
            border-radius: 3px;
            font-size: 11px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .demo-info h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .demo-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Custom Video Player ===== */
        .video-wrapper {
            position: relative;
            overflow: hidden;
            background: #000;
            cursor: pointer;
            -webkit-user-select: none;
            user-select: none;
        }

        .video-wrapper video {
            display: block;
            width: 100%;
            pointer-events: none;
        }

        .video-ctrl-bar {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 18px 14px;
            background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, transparent 100%);
            display: flex;
            align-items: center;
            gap: 10px;
            opacity: 0;
            transition: opacity 0.35s ease;
        }

        .video-wrapper:hover .video-ctrl-bar,
        .video-wrapper.is-paused .video-ctrl-bar {
            opacity: 1;
        }

        .v-btn {
            width: 34px;
            height: 34px;
            background: rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
            flex-shrink: 0;
        }

        .v-btn:hover {
            background: rgba(255, 255, 255, 0.26);
            transform: scale(1.1);
        }

        .v-btn svg {
            width: 13px;
            height: 13px;
            fill: rgba(255, 255, 255, 0.92);
        }

        .v-btn .v-icon-play {
            margin-left: 2px;
        }

        .v-status {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.6);
            font-family: var(--font-en);
            letter-spacing: 0.04em;
        }

        /* ===== Summary Section ===== */
        .summary {
            background: var(--bg-primary);
            text-align: center;
        }

        .summary-card {
            background: #fff7fa;
            border: 1px solid var(--border-subtle);
            border-top: 4px solid var(--accent);
            border-radius: 4px;
            padding: 72px;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }

        .summary-card::before {
            content: '';
            position: absolute;
            top: -200px;
            left: -200px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(219, 0, 82, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .summary-card h2 {
            font-size: 32px;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
        }

        .summary-card p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 620px;
            margin: 0 auto 36px;
            position: relative;
        }

        .summary-features {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
        }

        .summary-feature {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .summary-feature svg {
            width: 18px;
            height: 18px;
            stroke: var(--accent);
            fill: none;
        }

        /* ===== Footer ===== */
        footer {
            background: #f2f2f2;
            padding: 56px 0;
            border-top: 1px solid var(--border-subtle);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-subtle);
            border-radius: 4px;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.4s var(--ease-out-expo);
        }

        .footer-link:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: white;
            transform: translateY(-2px);
        }

        .footer-link svg {
            width: 16px;
            height: 16px;
            fill: currentColor;
        }

        .footer-copy {
            text-align: center;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-tertiary);
        }

        /* ===== Scroll Animations ===== */
        .reveal {
            opacity: 0;
            transform: translateY(40px);
            transition: all 0.8s var(--ease-out-expo);
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive ===== */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero .tagline {
                max-width: 340px;
                padding: 0 8px;
                font-size: 15px;
                line-height: 1.65;
                white-space: normal;
            }

            section {
                padding: 72px 0;
            }

            .intro-card,
            .abstract-card,
            .arch-container,
            .summary-card {
                padding: 40px 24px;
            }

            .abstract-card h2 {
                font-size: 28px;
                margin-bottom: 22px;
            }

            .framework-title {
                font-size: 28px;
            }

            .rollout-results .rollout-section-label {
                font-size: 28px;
            }

            .rollout-results .section-header h2 {
                font-size: 20px;
            }

            .abstract-card p {
                font-size: 15px;
                text-align: left;
            }

            .arch-flow {
                flex-direction: column;
            }

            .arch-arrow {
                transform: rotate(90deg);
            }

            .summary-features {
                flex-direction: column;
                align-items: center;
            }
        }


        /* ===== Smooth Scroll ===== */
        html {
            scroll-padding-top: 80px;
        }