/* 拆分说明：本文件由原 HTML 的 <style> 样式块拆分而来；中文注释保留，便于后续维护。 */
/* 路径说明：CSS 位于 css 子文件夹，引用根目录 1.jpg 时使用 ../../shared/background.jpg。 */
:root {
            --bg: #F5F5F3;
            --text: #111111;
            --secondary: #666666;
            --muted: rgba(17, 17, 17, 0.48);
            --accent: #E8FF2A;
            --accent-cyan: #00F0FF;
            --accent-red: #FF2A2A;
            --white: #FFFFFF;
            --black: #000000;
            --border: rgba(17, 17, 17, 0.12);
            --glass: rgba(255, 255, 255, 0.50);
            --glass-strong: rgba(255, 255, 255, 0.72);
            --font-main: 'Satoshi', 'Helvetica Neue', Arial, sans-serif;
            --font-cn: 'Noto Sans SC', sans-serif;
            --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
            --ease-circ: cubic-bezier(0.85, 0, 0.15, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            overflow-x: hidden;
            background-image: url('../../shared/background.jpg');
            background-size: cover;
            background-position: center center;
            background-attachment: fixed;
            background-color: #d6cec4;
        }

        body {
            min-height: 100vh;
            font-family: var(--font-main);
            color: var(--text);
            background: transparent;
            cursor: none;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body.native-cursor {
            cursor: auto;
        }

        /* 性能版说明：关闭自定义光标时，恢复链接和按钮的系统光标，避免 static 档出现“看不见鼠标”的交互问题。 */
        body.native-cursor a,
        body.native-cursor button {
            cursor: pointer;
        }

        body.native-cursor .cursor-dot,
        body.native-cursor .cursor-ring {
            display: none;
        }

        body.loading {
            overflow: hidden;
        }

        a, button {
            color: inherit;
            font: inherit;
            text-decoration: none;
            cursor: none;
        }

        button {
            border: 0;
            background: none;
        }

        img, video {
            display: block;
            width: 100%;
            height: 100%;
        }

        #three-canvas {
            position: fixed;
            inset: 0;
            z-index: -3;
            pointer-events: none;
        }

        #liquid-glass {
            position: fixed;
            inset: 0;
            z-index: -2;
            pointer-events: none;
            overflow: hidden;
            isolation: isolate;
        }

        .glass-image-base {
            position: absolute;
            inset: -2%;
            z-index: 0;
            background-image: url('../../shared/background.jpg');
            background-size: cover;
            background-position: center center;
            opacity: 0.56;
            filter: saturate(0.92) contrast(0.96) brightness(1.08);
            transform: scale(1.02);
        }

        .glass-frosted-base {
            position: absolute;
            inset: 0;
            z-index: 1;
            background:
                linear-gradient(115deg, rgba(255,255,255,0.76) 0%, rgba(245,247,246,0.58) 48%, rgba(236,239,235,0.66) 100%),
                radial-gradient(circle at 18% 18%, rgba(255,255,255,0.38), transparent 34%),
                radial-gradient(circle at 78% 36%, rgba(210,255,244,0.18), transparent 42%);
            backdrop-filter: blur(11px) saturate(1.12) contrast(1.02);
            -webkit-backdrop-filter: blur(11px) saturate(1.12) contrast(1.02);
        }

        .glass-frosted-base::before,
        .glass-frosted-base::after {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
        }

        .glass-frosted-base::before {
            background:
                linear-gradient(90deg, rgba(255,255,255,0.40), transparent 34%, rgba(255,255,255,0.18) 72%, transparent),
                linear-gradient(180deg, rgba(255,255,255,0.34), transparent 28%, rgba(0,0,0,0.045) 100%);
            opacity: 0.62;
        }

        .glass-frosted-base::after {
            background: radial-gradient(ellipse at center, transparent 48%, rgba(255,255,255,0.22) 100%);
            opacity: 0.72;
        }

        .glass-blob {
            position: absolute;
            z-index: 2;
            border-radius: 999px;
            pointer-events: none;
            filter: blur(26px);
            opacity: 0.42;
            animation: glassBlobFloat 38s ease-in-out infinite alternate;
            will-change: transform, opacity;
        }

        .blob-1 {
            width: 38vw;
            height: 32vw;
            top: 8%;
            left: -6%;
            background: radial-gradient(ellipse at 40% 40%, rgba(255,255,255,0.42) 0%, rgba(208,255,244,0.16) 58%, transparent 80%);
        }

        .blob-2 {
            width: 34vw;
            height: 36vw;
            top: 24%;
            right: -7%;
            background: radial-gradient(ellipse at 60% 50%, rgba(255,255,255,0.36) 0%, rgba(225,232,255,0.15) 58%, transparent 80%);
            animation-duration: 44s;
            animation-delay: -12s;
        }

        .blob-3 {
            width: 36vw;
            height: 24vw;
            bottom: 3%;
            left: 28%;
            background: radial-gradient(ellipse at 50% 55%, rgba(255,255,255,0.34) 0%, rgba(246,255,210,0.13) 58%, transparent 80%);
            animation-duration: 52s;
            animation-delay: -22s;
        }

        @keyframes glassBlobFloat {
            0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.34; }
            100% { transform: translate3d(4%, -3%, 0) scale(1.05); opacity: 0.48; }
        }

        .glass-grid,
        #dense-lines {
            position: fixed;
            inset: 0;
            pointer-events: none;
        }

        .glass-grid {
            z-index: -1;
            opacity: 0.28;
            background-image:
                linear-gradient(rgba(255,255,255,0.16) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.16) 1px, transparent 1px),
                linear-gradient(rgba(0,0,0,0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0,0,0,0.035) 1px, transparent 1px);
            background-size: 72px 72px, 72px 72px, 24px 24px, 24px 24px;
            mask-image: linear-gradient(90deg, rgba(0,0,0,0.25), rgba(0,0,0,0.82) 42%, rgba(0,0,0,0.55));
            -webkit-mask-image: linear-gradient(90deg, rgba(0,0,0,0.25), rgba(0,0,0,0.82) 42%, rgba(0,0,0,0.55));
        }

        #dense-lines {
            z-index: -1;
            background: repeating-linear-gradient(90deg, rgba(0,240,255,0.03) 0px, rgba(0,240,255,0.03) 1px, transparent 1px, transparent 5px);
            opacity: 0.4;
            mix-blend-mode: screen;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            z-index: 9999;
            pointer-events: none;
            opacity: 0.028;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
            background-size: 256px 256px;
        }

        #loader {
            position: fixed;
            inset: 0;
            z-index: 10000;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--black);
            transition: opacity 0.8s var(--ease-circ), visibility 0.8s;
        }

        #loader.hide {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }

        .loader-name {
            overflow: hidden;
            color: var(--white);
            font-size: 72px;
            font-weight: 700;
            line-height: 1;
        }

        .loader-name span {
            display: inline-block;
            transform: translateY(110%);
            animation: slideUp 0.9s var(--ease-out) 0.2s forwards;
        }

        .loader-sub {
            margin-top: 16px;
            color: rgba(255,255,255,0.42);
            font-size: 14px;
            text-transform: uppercase;
            opacity: 0;
            animation: fadeIn 0.6s ease 0.8s forwards;
        }

        .loader-counter {
            position: absolute;
            right: 60px;
            bottom: 48px;
            color: rgba(255,255,255,0.42);
            font-size: 16px;
            font-feature-settings: 'tnum';
        }

        .loader-bar {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0%;
            height: 2px;
            background: var(--accent);
            transition: width 0.1s linear;
        }

        @keyframes slideUp {
            to { transform: translateY(0); }
        }

        @keyframes fadeIn {
            to { opacity: 1; }
        }

        .cursor-dot,
        .cursor-ring {
            position: fixed;
            left: 0;
            top: 0;
            border-radius: 50%;
            pointer-events: none;
            transform: translate3d(-100px, -100px, 0) translate(-50%, -50%);
            will-change: transform;
        }

        .cursor-dot {
            z-index: 9998;
            width: 10px;
            height: 10px;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent), 0 0 16px rgba(232,255,42,0.5);
            mix-blend-mode: screen;
            transition: width 0.2s, height 0.2s, box-shadow 0.2s, opacity 0.2s;
        }

        .cursor-ring {
            z-index: 9997;
            width: 40px;
            height: 40px;
            border: 2.5px solid var(--accent);
            box-shadow: 0 0 12px rgba(232,255,42,0.4), inset 0 0 8px rgba(255,255,255,0.2);
            transition: width 0.3s var(--ease-out), height 0.3s var(--ease-out), border-color 0.3s, box-shadow 0.3s;
        }

        .cursor-ring.hover {
            width: 70px;
            height: 70px;
            border-color: var(--white);
            box-shadow: 0 0 20px var(--accent-cyan), 0 0 30px var(--accent), 0 0 40px var(--accent-red), inset 0 0 15px rgba(255,255,255,0.3);
            animation: rainbowPulse 2s ease-in-out infinite;
        }

        .cursor-ring.click {
            width: 24px;
            height: 24px;
            border-color: var(--white);
        }

        .cursor-dot.hover-active {
            width: 14px;
            height: 14px;
            box-shadow: 0 0 12px var(--accent), 0 0 24px rgba(232,255,42,0.7);
        }

        @keyframes rainbowPulse {
            0%, 100% { box-shadow: 0 0 20px var(--accent-cyan), 0 0 30px var(--accent), 0 0 40px var(--accent-red); }
            50% { box-shadow: 0 0 30px var(--accent-red), 0 0 40px var(--accent), 0 0 50px var(--accent-cyan); }
        }

        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            z-index: 999;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent), var(--accent-red));
            /* 性能版说明：JS 通过 scaleX 更新进度，避免滚动时修改 width 触发布局。 */
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.1s linear;
        }

        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 500;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 28px 60px;
            transition: padding 0.4s var(--ease-out), background 0.4s, border-color 0.4s;
        }

        nav.scrolled {
            padding: 18px 60px;
            background: rgba(245,245,243,0.85);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(25px);
            -webkit-backdrop-filter: blur(25px);
        }

        .nav-logo,
        .nav-cta,
        .section-label,
        .micro,
        .meta-label,
        .shot-kind {
            text-transform: uppercase;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
        }

        .nav-logo-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 14px rgba(232,255,42,0.7);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-links a {
            position: relative;
            color: var(--secondary);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 1px;
            background: var(--text);
            transition: width 0.3s var(--ease-out);
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-icon-link,
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1.5px solid var(--text);
            transition: background 0.3s, color 0.3s, border-color 0.3s, transform 0.3s var(--ease-out);
        }

        .nav-icon-link {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            font-size: 18px;
        }

        .nav-cta {
            min-height: 42px;
            padding: 0 22px;
            font-size: 15px;
            font-weight: 600;
        }

        .nav-icon-link:hover,
        .nav-cta:hover {
            color: var(--bg);
            background: var(--text);
            transform: translateY(-2px);
        }

        main {
            position: relative;
            z-index: 2;
        }

        section {
            position: relative;
            padding: 120px 60px;
        }

        .container {
            width: min(1320px, 100%);
            margin: 0 auto;
        }

        .section-grid {
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 20px;
        }

        .section-label {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--secondary);
            font-size: 14px;
            font-weight: 600;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 1px;
            background: var(--secondary);
        }

        .reveal {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
        }

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

        .stagger-1 { transition-delay: 0.1s; }
        .stagger-2 { transition-delay: 0.2s; }
        .stagger-3 { transition-delay: 0.3s; }
        .stagger-4 { transition-delay: 0.4s; }

        #hero {
            min-height: 100vh;
            display: grid;
            grid-template-rows: 1fr auto;
            padding-top: 120px;
            overflow: hidden;
        }

        #hero-lines-stage {
            position: absolute;
            inset: 0;
            z-index: 1;
            overflow: hidden;
            pointer-events: none;
        }

        #hero-lines-canvas {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            display: block;
        }

        .hero-content {
            position: relative;
            z-index: 5;
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 20px;
            align-items: end;
            padding-bottom: 78px;
        }

        .hero-main {
            grid-column: 1 / 9;
            align-self: center;
        }

        .hero-kicker {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            min-height: 34px;
            padding: 0 12px;
            color: rgba(17,17,17,0.72);
            background: rgba(255,255,255,0.48);
            border: 1px solid rgba(17,17,17,0.12);
            border-radius: 4px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            font-size: 13px;
            font-weight: 600;
        }

        .chip.dark {
            color: var(--white);
            background: var(--text);
            border-color: var(--text);
        }

        .hero-title {
            max-width: 860px;
            color: var(--text);
            font-size: 104px;
            font-weight: 700;
            line-height: 0.94;
        }

        .hero-title .line {
            display: block;
            overflow: hidden;
        }

        .hero-title .line span {
            display: block;
            transform: translateY(110%);
            animation: slideUp 1s var(--ease-out) forwards;
        }

        .hero-title .line:nth-child(1) span { animation-delay: 0.65s; }
        .hero-title .line:nth-child(2) span { animation-delay: 0.80s; }
        .hero-title .line:nth-child(3) span { animation-delay: 0.95s; }

        .accent-stroke {
            color: transparent;
            -webkit-text-stroke: 1.5px var(--text);
        }

        .hero-side {
            grid-column: 9 / 13;
            align-self: end;
        }

        .hero-desc {
            max-width: 340px;
            margin-bottom: 28px;
            color: var(--secondary);
            font-size: 17px;
            line-height: 1.75;
        }

        .hero-cn {
            font-family: var(--font-cn);
            color: rgba(17,17,17,0.62);
            font-size: 15px;
            line-height: 1.8;
        }

        .hero-bottom {
            position: relative;
            z-index: 5;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 20px 0 0;
            border-top: 1px solid var(--border);
        }

        .hero-meta-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
        }

        .micro {
            color: var(--secondary);
            font-size: 14px;
            font-weight: 600;
        }

        .scroll-hint {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--secondary);
            animation: bounce 2s ease-in-out infinite 2s;
        }

        .scroll-arrow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border: 1px solid var(--secondary);
            border-radius: 50%;
            font-size: 12px;
        }

        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        .marquee-section {
            overflow: hidden;
            padding: 18px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            background: var(--text);
        }

        .marquee-track {
            display: flex;
            gap: 60px;
            width: max-content;
            white-space: nowrap;
            animation: marquee 30s linear infinite;
        }

        .marquee-item {
            display: flex;
            align-items: center;
            gap: 60px;
            flex-shrink: 0;
            color: var(--white);
            font-size: 15px;
            font-weight: 500;
            text-transform: uppercase;
        }

        .marquee-item .dot {
            width: 5px;
            height: 5px;
            display: inline-block;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--accent);
        }

        @keyframes marquee {
            from { transform: translateX(0); }
            to { transform: translateX(-50%); }
        }

        #watch {
            padding-top: 140px;
        }

        .watch-head {
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 20px;
            margin-bottom: 36px;
        }

        .watch-head .section-label {
            grid-column: 1 / 4;
        }

        .watch-summary {
            grid-column: 5 / 13;
            color: var(--text);
            font-size: 34px;
            font-weight: 500;
            line-height: 1.18;
        }

        .video-stage {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            min-height: 420px;
            background: rgba(10,10,10,0.92);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 8px;
            box-shadow: 0 32px 90px rgba(0,0,0,0.28);
            isolation: isolate;
        }

        .video-stage::before {
            content: '';
            position: absolute;
            inset: -1px;
            z-index: 3;
            pointer-events: none;
            background:
                linear-gradient(90deg, transparent, rgba(255,255,255,0.10), transparent),
                repeating-linear-gradient(0deg, rgba(255,255,255,0.045) 0px, rgba(255,255,255,0.045) 1px, transparent 1px, transparent 5px);
            mix-blend-mode: screen;
            opacity: 0.45;
        }

        .video-stage::after {
            content: '';
            position: absolute;
            inset: -2px;
            z-index: 1;
            background:
                radial-gradient(circle at 25% 22%, rgba(0,240,255,0.20), transparent 25%),
                radial-gradient(circle at 76% 68%, rgba(232,255,42,0.18), transparent 30%),
                radial-gradient(circle at 58% 24%, rgba(255,42,42,0.12), transparent 22%);
            filter: blur(28px);
            opacity: 0.78;
        }

        .video-el {
            position: absolute;
            inset: 0;
            z-index: 2;
            object-fit: cover;
            background: #050505;
        }

        .video-el[hidden] {
            display: none;
        }

        .video-fallback {
            position: absolute;
            inset: 0;
            z-index: 2;
            overflow: hidden;
            background:
                linear-gradient(120deg, rgba(255,255,255,0.08), transparent 32%),
                radial-gradient(circle at 62% 46%, rgba(232,255,42,0.10), transparent 18%),
                #070707;
        }

        .video-fallback::before {
            content: '';
            position: absolute;
            inset: 8%;
            border: 1px solid rgba(255,255,255,0.14);
            background:
                linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px),
                linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
            background-size: 8.333% 12.5%;
            opacity: 0.75;
        }

        .orbit-system {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 54%;
            max-width: 560px;
            aspect-ratio: 1;
            transform: translate(-50%, -50%);
            border: 1px solid rgba(232,255,42,0.22);
            border-radius: 50%;
            animation: orbitSpin 18s linear infinite;
        }

        .orbit-system::before,
        .orbit-system::after {
            content: '';
            position: absolute;
            border-radius: 50%;
        }

        .orbit-system::before {
            inset: 16%;
            border: 1px solid rgba(0,240,255,0.22);
            animation: innerOrbitSpin 12s linear infinite reverse;
        }

        .orbit-system::after {
            top: 50%;
            left: 50%;
            width: 13%;
            aspect-ratio: 1;
            background: var(--accent);
            box-shadow: 0 0 32px rgba(232,255,42,0.85);
            transform: translate(-50%, -50%);
        }

        @keyframes orbitSpin {
            from { transform: translate(-50%, -50%) rotate(0deg); }
            to { transform: translate(-50%, -50%) rotate(360deg); }
        }

        @keyframes innerOrbitSpin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .scanline {
            position: absolute;
            left: 8%;
            right: 8%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent), transparent);
            opacity: 0.75;
            animation: scanMove 4s ease-in-out infinite;
        }

        @keyframes scanMove {
            0%, 100% { top: 16%; }
            50% { top: 82%; }
        }

        .video-hud {
            position: absolute;
            inset: 28px;
            z-index: 4;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            pointer-events: none;
        }

        .video-hud-top,
        .video-hud-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .video-code {
            color: rgba(255,255,255,0.74);
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
        }

        .timecode {
            color: var(--accent);
            font-size: 24px;
            font-weight: 700;
            font-feature-settings: 'tnum';
        }

        .video-title {
            max-width: 600px;
            color: var(--white);
            font-size: 46px;
            font-weight: 700;
            line-height: 1.02;
            text-shadow: 0 0 28px rgba(0,0,0,0.6);
        }

        .play-button {
            position: absolute;
            left: 50%;
            top: 50%;
            z-index: 6;
            display: none;
            width: 72px;
            height: 72px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255,255,255,0.36);
            border-radius: 50%;
            background: rgba(255,255,255,0.16);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transform: translate(-50%, -50%);
            transition: transform 0.3s var(--ease-out), background 0.3s;
        }

        .play-button::before {
            content: '';
            width: 0;
            height: 0;
            margin-left: 4px;
            border-top: 13px solid transparent;
            border-bottom: 13px solid transparent;
            border-left: 20px solid var(--white);
        }

        .play-button.is-visible {
            display: flex;
        }

        .play-button:hover {
            background: rgba(232,255,42,0.26);
            transform: translate(-50%, -50%) scale(1.08);
        }

        #info {
            padding-top: 40px;
        }

        .info-intro {
            grid-column: 1 / 6;
        }

        .info-intro p {
            margin-top: 26px;
            color: var(--secondary);
            font-size: 18px;
            line-height: 1.75;
        }

        .info-table {
            grid-column: 7 / 13;
            display: grid;
            gap: 1px;
            background: var(--border);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
        }

        .info-row {
            display: grid;
            grid-template-columns: minmax(120px, 0.34fr) 1fr;
            gap: 20px;
            padding: 24px;
            background: var(--glass-strong);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .meta-label {
            color: var(--muted);
            font-size: 13px;
            font-weight: 700;
        }

        .meta-value {
            color: var(--text);
            font-size: 16px;
            line-height: 1.55;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            min-height: 30px;
            padding: 0 10px;
            color: rgba(17,17,17,0.76);
            background: rgba(255,255,255,0.48);
            border: 1px solid rgba(17,17,17,0.10);
            border-radius: 4px;
            font-size: 13px;
            font-weight: 600;
        }

        #process {
            padding-top: 130px;
        }

        .process-head {
            grid-column: 1 / 4;
        }

        .process-copy {
            grid-column: 5 / 12;
            color: var(--text);
            font-size: 42px;
            font-weight: 500;
            line-height: 1.18;
        }

        .process-list {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 20px;
            margin-top: 54px;
        }

        .process-card {
            min-height: 330px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 26px;
            overflow: hidden;
            position: relative;
            background: rgba(255,255,255,0.58);
            border: 1px solid rgba(17,17,17,0.10);
            border-radius: 8px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: transform 0.45s var(--ease-out), border-color 0.45s, box-shadow 0.45s;
        }

        .process-card::before {
            content: '';
            position: absolute;
            inset: -2px;
            z-index: -1;
            opacity: 0;
            background: linear-gradient(45deg, var(--accent-cyan), var(--accent), var(--accent-red));
            filter: blur(14px);
            transition: opacity 0.45s var(--ease-out);
        }

        .process-card:hover {
            transform: translateY(-8px);
            border-color: rgba(17,17,17,0.24);
            box-shadow: 0 24px 70px rgba(0,0,0,0.14);
        }

        .process-card:hover::before {
            opacity: 0.46;
        }

        .process-num {
            color: var(--secondary);
            font-size: 14px;
            font-weight: 700;
        }

        .process-card h3 {
            margin-top: 48px;
            color: var(--text);
            font-size: 24px;
            line-height: 1.15;
        }

        .process-card p {
            margin-top: 18px;
            color: var(--secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        #shots {
            padding-top: 130px;
        }

        .shots-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 44px;
        }

        .shots-title {
            margin-top: 22px;
            color: var(--text);
            font-size: 64px;
            line-height: 0.98;
        }

        .shots-note {
            max-width: 360px;
            color: var(--secondary);
            font-size: 16px;
            line-height: 1.7;
        }

        .shot-grid {
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 20px;
        }

        .shot-card {
            position: relative;
            grid-column: span 4;
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: #0a0a0a;
            border-radius: 8px;
            border: 1px solid rgba(255,255,255,0.14);
            isolation: isolate;
        }

        .shot-card.large {
            grid-column: span 8;
            aspect-ratio: 16 / 7;
        }

        .shot-visual {
            position: absolute;
            inset: 0;
            background:
                linear-gradient(120deg, rgba(255,255,255,0.08), transparent 35%),
                radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(232,255,42,0.18), transparent 25%),
                #0a0a0a;
            transition: transform 0.8s var(--ease-out);
        }

        .shot-card:nth-child(2) .shot-visual {
            --x: 22%;
            --y: 70%;
            background:
                linear-gradient(135deg, rgba(0,240,255,0.18), transparent 34%),
                radial-gradient(circle at 72% 34%, rgba(255,42,42,0.14), transparent 26%),
                #111;
        }

        .shot-card:nth-child(3) .shot-visual {
            --x: 70%;
            --y: 42%;
            background:
                repeating-linear-gradient(90deg, rgba(255,255,255,0.07) 0 1px, transparent 1px 13px),
                radial-gradient(circle at 28% 48%, rgba(232,255,42,0.18), transparent 26%),
                #080808;
        }

        .shot-card:nth-child(4) .shot-visual {
            --x: 48%;
            --y: 22%;
            background:
                linear-gradient(160deg, rgba(255,42,42,0.13), transparent 30%),
                radial-gradient(circle at 62% 62%, rgba(0,240,255,0.18), transparent 26%),
                #0d0d0d;
        }

        .shot-card:hover .shot-visual {
            transform: scale(1.05);
        }

        .shot-visual::before {
            content: '';
            position: absolute;
            inset: 9%;
            border: 1px solid rgba(255,255,255,0.12);
            background:
                linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px),
                linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px);
            background-size: 12.5% 20%;
        }

        .shot-overlay {
            position: absolute;
            inset: 0;
            z-index: 2;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px;
            background: linear-gradient(180deg, transparent 20%, rgba(0,0,0,0.76) 100%);
        }

        .shot-kind {
            color: var(--accent);
            font-size: 12px;
            font-weight: 700;
        }

        .shot-name {
            margin-top: 8px;
            color: var(--white);
            font-size: 22px;
            font-weight: 700;
            line-height: 1.15;
        }

        .shot-desc {
            margin-top: 8px;
            max-width: 520px;
            color: rgba(255,255,255,0.68);
            font-size: 14px;
            line-height: 1.55;
        }

        #next {
            padding-bottom: 80px;
        }

        .next-panel {
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 20px;
            align-items: end;
            padding: 42px;
            background: rgba(17,17,17,0.92);
            color: var(--white);
            border-radius: 8px;
            overflow: hidden;
            position: relative;
        }

        .next-panel::before {
            content: '';
            position: absolute;
            inset: -40%;
            background:
                radial-gradient(circle at 26% 42%, rgba(0,240,255,0.18), transparent 26%),
                radial-gradient(circle at 72% 56%, rgba(232,255,42,0.16), transparent 28%),
                radial-gradient(circle at 58% 18%, rgba(255,42,42,0.12), transparent 22%);
            filter: blur(18px);
            opacity: 0.88;
        }

        .next-copy {
            position: relative;
            z-index: 2;
            grid-column: 1 / 8;
        }

        .next-copy h2 {
            font-size: 56px;
            line-height: 1;
        }

        .next-copy p {
            max-width: 520px;
            margin-top: 20px;
            color: rgba(255,255,255,0.68);
            font-size: 17px;
            line-height: 1.7;
        }

        .next-actions {
            position: relative;
            z-index: 2;
            grid-column: 9 / 13;
            display: flex;
            justify-content: flex-end;
            gap: 12px;
            flex-wrap: wrap;
        }

        .ghost-button,
        .solid-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            padding: 0 22px;
            border-radius: 4px;
            font-size: 15px;
            font-weight: 700;
            transition: transform 0.3s var(--ease-out), background 0.3s, color 0.3s;
        }

        .ghost-button {
            color: var(--white);
            border: 1px solid rgba(255,255,255,0.36);
        }

        .solid-button {
            color: var(--text);
            background: var(--accent);
            border: 1px solid var(--accent);
        }

        .ghost-button:hover,
        .solid-button:hover {
            transform: translateY(-2px);
        }

        footer {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            padding: 28px 60px;
            color: var(--secondary);
            border-top: 1px solid var(--border);
            font-size: 14px;
        }

        @media (max-width: 1180px) {
            nav {
                padding: 24px 36px;
            }

            nav.scrolled {
                padding: 16px 36px;
            }

            section {
                padding-left: 36px;
                padding-right: 36px;
            }

            .hero-title {
                font-size: 78px;
            }

            .hero-main {
                grid-column: 1 / 9;
            }

            .hero-side {
                grid-column: 9 / 13;
            }

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

        @media (max-width: 900px) {
            .nav-links {
                display: none;
            }

            .hero-content,
            .section-grid,
            .watch-head {
                grid-template-columns: 1fr;
            }

            .hero-main,
            .hero-side,
            .watch-head .section-label,
            .watch-summary,
            .info-intro,
            .info-table,
            .process-head,
            .process-copy,
            .next-copy,
            .next-actions {
                grid-column: 1;
            }

            .hero-content {
                align-content: end;
                padding-bottom: 52px;
            }

            .hero-side {
                max-width: 520px;
            }

            .hero-title {
                font-size: 68px;
            }

            .watch-summary,
            .process-copy {
                font-size: 30px;
            }

            .video-stage {
                min-height: 0;
            }

            .video-title {
                font-size: 34px;
            }

            .timecode {
                font-size: 20px;
            }

            .shots-head {
                align-items: flex-start;
                flex-direction: column;
            }

            .shots-title {
                font-size: 48px;
            }

            .shot-card,
            .shot-card.large {
                grid-column: span 12;
                aspect-ratio: 16 / 10;
            }

            .next-panel {
                grid-template-columns: 1fr;
            }

            .next-actions {
                justify-content: flex-start;
            }
        }

        @media (max-width: 640px) {
            body {
                cursor: auto;
            }

            a, button {
                cursor: pointer;
            }

            .cursor-dot,
            .cursor-ring {
                display: none;
            }

            nav {
                padding: 18px 20px;
            }

            nav.scrolled {
                padding: 14px 20px;
            }

            .nav-logo {
                font-size: 15px;
            }

            .nav-cta {
                display: none;
            }

            section {
                padding: 84px 20px;
            }

            #hero {
                min-height: 92vh;
                padding-top: 104px;
            }

            .hero-title {
                font-size: 46px;
                line-height: 1;
            }

            .hero-kicker {
                gap: 8px;
                margin-bottom: 24px;
            }

            .chip {
                min-height: 30px;
                font-size: 12px;
            }

            .hero-desc {
                font-size: 16px;
            }

            .hero-bottom {
                align-items: flex-start;
                flex-direction: column;
            }

            .marquee-track {
                gap: 36px;
            }

            .marquee-item {
                gap: 36px;
                font-size: 13px;
            }

            .watch-summary,
            .process-copy {
                font-size: 25px;
            }

            .video-hud {
                inset: 18px;
            }

            .video-code {
                font-size: 11px;
            }

            .video-title {
                font-size: 24px;
            }

            .timecode {
                display: none;
            }

            .info-row {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 20px;
            }

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

            .process-card {
                min-height: 260px;
            }

            .shots-title,
            .next-copy h2 {
                font-size: 38px;
            }

            .next-panel {
                padding: 28px;
            }

            footer {
                flex-direction: column;
                padding: 24px 20px;
            }
        }

        /* ═══════════════════════════════════════════
           紧凑侧栏版覆盖层
           说明：按你的要求，原有 CSS 先不删除。下面这些规则放在原样式后面，
           专门覆盖“首页式大间距”和“普通 shots section”布局，让详情页更密集。
        ═══════════════════════════════════════════ */

        /* 页面主布局：用右侧窄栏承载 Frames。展开时改变 grid 列宽，
           主内容会被重新分配宽度，而不是被侧栏覆盖。 */
        .detail-layout {
            width: min(1540px, calc(100% - 96px));
            margin: 0 auto;
            padding-top: 96px;
            display: grid;
            grid-template-columns: minmax(0, 1fr) 72px;
            gap: 20px;
            align-items: start;
            transition: grid-template-columns 0.42s var(--ease-out), gap 0.42s var(--ease-out);
        }

        body.shots-open .detail-layout {
            grid-template-columns: minmax(0, 1fr) minmax(360px, 420px);
        }

        .detail-main {
            min-width: 0;
        }

        /* 间距压缩：原页面 section 是 120px 上下，且部分 section 又叠加
           130px/140px 顶部空白。这里统一改成详情页密度，方便同屏显示更多信息。 */
        .detail-main section {
            padding: 56px 0;
        }

        .detail-main #watch {
            padding-top: 0;
            padding-bottom: 48px;
        }

        .detail-main #info,
        .detail-main #process,
        .detail-main #next {
            padding-top: 48px;
        }

        .detail-main #next {
            padding-bottom: 56px;
        }

        /* 项目信息迁移区：hero HTML 已删除，但这些 ID 继续存在于 watch 顶部，
           这样旧的 PROJECT_DATA 渲染逻辑不用大拆，也不会因为找不到节点报错。 */
        .compact-project-head {
            margin-bottom: 28px;
            padding: 24px;
            background: rgba(255,255,255,0.54);
            border: 1px solid rgba(17,17,17,0.10);
            border-radius: 8px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .compact-project-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 20px;
        }

        .compact-project-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(260px, 0.42fr);
            gap: 24px;
            align-items: end;
        }

        .compact-project-title {
            max-width: none;
            font-size: clamp(42px, 6.4vw, 86px);
            line-height: 0.94;
        }

        .compact-project-copy {
            padding-bottom: 6px;
        }

        .compact-project-copy .hero-desc {
            max-width: 420px;
            margin-bottom: 12px;
            font-size: 16px;
            line-height: 1.62;
        }

        .compact-project-copy .hero-cn {
            font-size: 14px;
            line-height: 1.7;
        }

        .compact-meta-strip {
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        /* 内容密度微调：缩短标题、视频、过程卡片和 CTA 的内部间距。 */
        .watch-head {
            margin-bottom: 24px;
        }

        .watch-summary {
            font-size: clamp(24px, 3.2vw, 32px);
            line-height: 1.16;
        }

        .video-stage {
            min-height: 360px;
        }

        .info-intro p {
            margin-top: 18px;
            font-size: 17px;
            line-height: 1.65;
        }

        .info-row {
            padding: 18px 20px;
        }

        .process-copy {
            font-size: clamp(26px, 3.6vw, 36px);
        }

        .process-list {
            margin-top: 32px;
            gap: 16px;
        }

        .process-card {
            min-height: 250px;
            padding: 22px;
        }

        .process-card h3 {
            margin-top: 32px;
            font-size: 22px;
        }

        .process-card p {
            margin-top: 12px;
            line-height: 1.58;
        }

        .next-panel {
            padding: 32px;
        }

        .next-copy h2 {
            font-size: clamp(34px, 4.8vw, 50px);
        }

        .next-copy p {
            margin-top: 16px;
            font-size: 16px;
            line-height: 1.62;
        }

        .compact-marquee {
            margin: 0;
            padding: 12px 0;
            border-color: rgba(17,17,17,0.10);
        }

        /* V5 Back 区域覆盖层：
           这里复刻 project-detail-v4.html 中 #back 的 Next Work 面板视觉。
           选择器全部限定在 #back 内，避免覆盖视频页其他 .next-panel / .next-actions 风格。 */
        .detail-main #back {
            padding-top: 48px;
            padding-bottom: 56px;
        }

        #back .next-panel {
            position: relative;
            min-height: 360px;
            border-radius: 8px;
            padding: 46px;
            background: rgba(255,255,255,0.46);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255,255,255,0.42);
            overflow: hidden;
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            column-gap: 20px;
            align-items: end;
            color: var(--text);
            transition: background 0.2s var(--ease-out), border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
        }

        /* V6/V5 hover 修复说明：
           project-detail-v4.html 的淡彩 hover 来自 .next-panel::before 渐变层。
           上一版这里使用 content: none 会直接关闭该层，所以鼠标移入时白色玻璃面板不会变成淡彩背景。
           现在把渐变层限定恢复到 #back 内，并用 200ms 左右的 opacity 过渡做快速渐显，
           避免鼠标移入时从白色背景瞬间跳成淡彩背景。 */
        #back .next-panel::before {
            content: '';
            position: absolute;
            inset: -2px;
            background: linear-gradient(45deg, var(--accent-cyan), var(--accent), var(--accent-red));
            opacity: 0;
            z-index: -1;
            filter: blur(12px);
            transition: opacity 0.2s var(--ease-out), filter 0.2s var(--ease-out);
            border-radius: 8px;
        }

        #back .next-panel:hover::before {
            opacity: 0.45;
        }

        #back .next-panel:hover {
            border-color: rgba(255,255,255,0.62);
            box-shadow: 0 24px 70px rgba(0,0,0,0.12);
        }

        #back .next-panel::after {
            content: 'NEXT';
            position: absolute;
            right: -2vw;
            top: 10px;
            font-size: clamp(120px, 20vw, 280px);
            font-weight: 900;
            letter-spacing: -0.08em;
            color: rgba(17,17,17,0.035);
            pointer-events: none;
        }

        #back .next-copy {
            grid-column: 1 / 7;
            position: relative;
            z-index: 2;
        }

        #back .next-copy h2 {
            font-size: clamp(42px, 6vw, 86px);
            font-weight: 700;
            line-height: 0.96;
            letter-spacing: -0.05em;
            margin-top: 24px;
        }

        #back .next-actions {
            grid-column: 8 / 13;
            position: relative;
            z-index: 2;
            display: flex;
            align-items: flex-end;
            justify-content: flex-end;
            gap: 16px;
            flex-wrap: wrap;
        }

        #back .action-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-height: 48px;
            padding: 0 22px;
            border: 1.5px solid var(--text);
            border-radius: 4px;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            transition: background 0.3s, color 0.3s, gap 0.3s, transform 0.3s var(--ease-out);
        }

        #back .action-link.primary {
            background: var(--text);
            color: var(--bg);
        }

        #back .action-link:hover {
            gap: 15px;
            transform: translateY(-2px);
        }

        /* Frames 右侧栏：保留 #shots 和 #shotGrid，让旧数据渲染继续工作；
           默认折叠成窄 rail，展开后只占右侧 grid 列，不使用覆盖式抽屉。 */
        #shots.shots-sidebar {
            position: sticky;
            top: 92px;
            height: calc(100vh - 112px);
            min-height: 520px;
            padding: 0;
            overflow: hidden;
            background: rgba(17,17,17,0.88);
            border: 1px solid rgba(255,255,255,0.16);
            border-radius: 8px;
            color: var(--white);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            box-shadow: 0 24px 70px rgba(0,0,0,0.20);
        }

        .shots-toggle {
            position: relative;
            z-index: 4;
            width: 100%;
            height: 100%;
            display: grid;
            grid-template-rows: auto 1fr auto;
            align-items: center;
            justify-items: center;
            gap: 14px;
            padding: 18px 10px;
            color: var(--white);
            border: 0;
            background: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.03));
            transition: background 0.3s var(--ease-out);
        }

        .shots-toggle:hover {
            background: linear-gradient(180deg, rgba(232,255,42,0.18), rgba(0,240,255,0.08));
        }

        .shots-toggle-index,
        .shots-toggle-icon {
            color: var(--accent);
            font-size: 13px;
            font-weight: 800;
        }

        .shots-toggle-label {
            writing-mode: vertical-rl;
            transform: rotate(180deg);
            letter-spacing: 0.18em;
            text-transform: uppercase;
            font-size: 13px;
            font-weight: 800;
        }

        body.shots-open .shots-toggle {
            height: 58px;
            grid-template-columns: auto 1fr auto;
            grid-template-rows: 1fr;
            justify-items: stretch;
            padding: 0 18px;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }

        body.shots-open .shots-toggle-label {
            writing-mode: horizontal-tb;
            transform: none;
        }

        .shots-panel-body {
            height: calc(100% - 58px);
            padding: 0 16px 18px;
            overflow: auto;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transform: translateX(12px);
            transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out), visibility 0.3s;
        }

        body.shots-open .shots-panel-body {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(0);
        }

        .shots-sidebar .shots-head {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 16px;
            margin: 18px 0 18px;
        }

        .shots-sidebar .shots-title {
            margin-top: 12px;
            font-size: 36px;
        }

        .shots-sidebar .shots-note {
            max-width: none;
            color: rgba(255,255,255,0.62);
            font-size: 14px;
            line-height: 1.58;
        }

        .shots-sidebar .section-label {
            color: rgba(255,255,255,0.58);
        }

        .shots-sidebar .section-label::before {
            background: rgba(255,255,255,0.36);
        }

        .shots-sidebar .shot-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
        }

        .shots-sidebar .shot-card,
        .shots-sidebar .shot-card.large {
            grid-column: 1;
            aspect-ratio: 16 / 10;
            min-height: 168px;
        }

        .shots-sidebar .shot-overlay {
            padding: 18px;
        }

        .shots-sidebar .shot-name {
            font-size: 18px;
        }

        .shots-sidebar .shot-desc {
            font-size: 13px;
            line-height: 1.45;
        }

        /* 中等屏幕：右侧栏展开时给它稍小的宽度，避免主视频被压得过窄。 */
        @media (max-width: 1180px) {
            .detail-layout,
            body.shots-open .detail-layout {
                width: min(100% - 72px, 1180px);
                grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
            }

            body:not(.shots-open) .detail-layout {
                grid-template-columns: minmax(0, 1fr) 64px;
            }

            .compact-project-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 移动端：没有右侧空白时，Frames 变成普通内联折叠模块；
           展开会把下面内容推开，不做浮层遮挡。 */
        @media (max-width: 900px) {
            .detail-layout,
            body.shots-open .detail-layout,
            body:not(.shots-open) .detail-layout {
                width: calc(100% - 40px);
                padding-top: 88px;
                display: block;
            }

            .detail-main section {
                padding: 44px 0;
            }

            .detail-main #watch {
                padding-top: 0;
            }

            .compact-project-head {
                padding: 20px;
            }

            #shots.shots-sidebar {
                position: relative;
                top: auto;
                height: auto;
                min-height: 0;
                margin: 10px 0 44px;
            }

            .shots-toggle,
            body.shots-open .shots-toggle {
                height: 56px;
                min-height: 56px;
                grid-template-columns: auto 1fr auto;
                grid-template-rows: 1fr;
                justify-items: stretch;
                padding: 0 18px;
            }

            .shots-toggle-label {
                writing-mode: horizontal-tb;
                transform: none;
            }

            .shots-panel-body {
                height: auto;
                max-height: 0;
                padding: 0 16px;
                overflow: hidden;
            }

            body.shots-open .shots-panel-body {
                max-height: none;
                padding: 0 16px 18px;
                overflow: visible;
            }

            /* V5 Back 区域移动端说明：
               V4 桌面版使用 12 栅格；手机端必须收成单列，
               避免 #back 内的 next-copy / next-actions 生成隐形网格列导致横向溢出。 */
            #back .next-panel {
                grid-template-columns: 1fr;
                min-height: auto;
                padding: 34px;
                row-gap: 28px;
            }

            #back .next-copy,
            #back .next-actions {
                grid-column: 1;
            }

            #back .next-actions {
                justify-content: flex-start;
            }
        }

        @media (max-width: 640px) {
            .detail-layout,
            body.shots-open .detail-layout,
            body:not(.shots-open) .detail-layout {
                width: calc(100% - 32px);
                padding-top: 82px;
            }

            .detail-main section {
                padding: 38px 0;
            }

            .compact-project-title {
                font-size: 42px;
            }

            .compact-meta-strip {
                gap: 12px;
            }

            .video-stage {
                min-height: 0;
            }

            #back .next-panel {
                padding: 28px;
            }

            #back .next-copy h2 {
                font-size: 38px;
            }
        }

        /* ═══════════════════════════════════════════
           V5 性能优化覆盖层
           目标：保持 V21/V4 的玻璃拟态、网格、霓虹和作品详情构图，
           但取消会长期占用 GPU 的装饰性持续动画与大面积高强度模糊。
        ═══════════════════════════════════════════ */

        /* 全屏玻璃层仍保留，但降低 backdrop-filter 强度。
           这是整页最昂贵的合成层之一，轻微降模糊能显著减轻核显压力。 */
        .glass-frosted-base {
            backdrop-filter: blur(7px) saturate(1.04) contrast(1.01);
            -webkit-backdrop-filter: blur(7px) saturate(1.04) contrast(1.01);
        }

        .glass-blob {
            filter: blur(16px);
            opacity: 0.30;
            animation: none;
            will-change: auto;
        }

        /* 详情页不需要持续跑马灯来证明动效能力。
           保留黑底信息条和关键词，停止无限位移动画，降低长期绘制成本。 */
        .marquee-track {
            animation: none;
            transform: none;
        }

        /* 视频占位视觉改为静态 HUD。
           轨道与扫描线仍可见，但停止无限旋转/扫描，避免无视频时仍持续占 GPU。 */
        .orbit-system,
        .orbit-system::before,
        .scanline {
            animation: none;
        }

        .scanline {
            top: 58%;
        }

        .video-stage::after {
            filter: blur(18px);
            opacity: 0.62;
        }

        /* 右侧边栏、项目头、信息表等玻璃卡片降低模糊强度。
           视觉仍是半透明玻璃，但不再叠加过多高成本模糊层。 */
        .compact-project-head,
        .info-row,
        .process-card,
        #back .next-panel,
        #shots.shots-sidebar {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        #back .next-panel::before {
            filter: blur(8px);
        }

        .process-card::before {
            filter: blur(8px);
        }

        /* 自定义光标保留，但去掉循环彩虹脉冲，避免 hover 时也持续动画。 */
        .cursor-ring.hover {
            animation: none;
        }

        /* 下方内容在接近视口前延后布局/绘制，减少打开页面瞬间的工作量。
           contain-intrinsic-size 给浏览器一个预估高度，避免滚动条大幅跳动。 */
        #info,
        #process,
        #back,
        #shots {
            content-visibility: auto;
            contain-intrinsic-size: 720px;
        }

        /* V6 局部动效恢复说明：
           V5 为了压低核显占用关闭了所有持续动画；这里仅恢复用户点名的跑马灯和视频舞台内部动效。
           动画必须依赖 .motion-in-view 状态类，只有元素进入视口时才运行，避免整页后台持续绘制。 */
        .compact-marquee .marquee-track {
            animation: none;
            transform: translate3d(0, 0, 0);
            will-change: auto;
        }

        .compact-marquee.motion-in-view .marquee-track {
            animation: marquee 46s linear infinite;
            will-change: transform;
        }

        /* V6 视频舞台动效说明：
           只恢复 #videoStage 内部的占位轨道和扫描线，不恢复全局 WebGL 循环、玻璃光斑漂移或大面积模糊动画。
           当真实视频接入并显示时，fallback 会被隐藏，因此这些占位动画不会叠在播放器上。 */
        #videoStage .orbit-system,
        #videoStage .orbit-system::before,
        #videoStage .scanline {
            animation: none;
            will-change: auto;
        }

        #videoStage.motion-in-view:not(.has-video) .orbit-system {
            animation: orbitSpin 28s linear infinite;
            will-change: transform;
        }

        #videoStage.motion-in-view:not(.has-video) .orbit-system::before {
            animation: innerOrbitSpin 20s linear infinite reverse;
            will-change: transform;
        }

        #videoStage.motion-in-view:not(.has-video) .scanline {
            animation: scanMove 6s ease-in-out infinite;
            will-change: top;
        }

        /* V6 播放器状态说明：
           外层 #videoStage 是视觉容器；真正播放视频的是内部 <video>。
           播放期间淡出 HUD，避免说明文字遮住原生 controls；暂停或结束后再显示播放入口。 */
        #videoStage.has-video .video-hud {
            transition: opacity 0.22s var(--ease-out);
        }

        #videoStage.has-video.is-playing .video-hud {
            opacity: 0;
        }

        #videoStage.has-video-error .video-hud {
            opacity: 1;
        }

        /* 性能版 static 档：保留视觉层次，但停止长期合成成本最高的装饰动画。 */
        html.performance-static .glass-blob,
        html.performance-static .marquee-track,
        html.performance-static .orbit-system,
        html.performance-static .scanline {
            animation: none !important;
            will-change: auto !important;
        }

        html.performance-static #three-canvas {
            display: none;
        }

        html.performance-static .glass-frosted-base {
            backdrop-filter: blur(6px) saturate(1.03) contrast(1.01);
            -webkit-backdrop-filter: blur(6px) saturate(1.03) contrast(1.01);
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
                transition-duration: 0.01ms !important;
            }

            /* V5 可访问性与性能说明：减少动态时直接隐藏 WebGL canvas，
               玻璃背景和静态网格仍能维持视觉风格。 */
            #three-canvas {
                display: none;
            }
        }