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

:root {
    --font-en: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
    --font-cn: "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;
    --font-serif-cn: "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", "Menlo", "Courier New", monospace;

    /* 纯黑宇宙星空主题 — 黑白版 */
    --bg: #000000;
    --bg-dark: #000000;
    --bg-light: #050508;

    --text: #ffffff;
    --text-90: rgba(255,255,255,0.94);
    --text-80: rgba(255,255,255,0.84);
    --text-70: rgba(255,255,255,0.66);
    --text-50: rgba(255,255,255,0.52);
    --text-20: rgba(255,255,255,0.28);
    --text-08: rgba(255,255,255,0.10);
    --line: rgba(255,255,255,0.12);
    --accent: rgba(255,255,255,0.8);
    --accent-soft: rgba(255,255,255,0.08);

    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg);
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-en), var(--font-cn);
    background: var(--bg);
    color: var(--text);
    line-height: 1.45;
    overflow-x: hidden;
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
}

::selection { background: var(--text); color: var(--bg); }

/* ===== BACKGROUND ===== */
#bg-canvas {
    position: fixed; inset: 0;
    z-index: 0;
    pointer-events: none;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.noise-overlay {
    position: fixed; inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.vignette {
    position: fixed; inset: 0;
    z-index: 2;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, transparent 0%, transparent 45%, rgba(0,0,0,0.7) 100%);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* ===== CSS STARRY BACKGROUND ===== */
#bg-canvas { display: none !important; }

#starfield {
    position: fixed; inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
    background: #000;
}

.nebula-layer {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    mix-blend-mode: screen;
    will-change: transform;
    animation: nebulaPulse 12s ease-in-out infinite alternate;
}
.nebula-1 {
    width: 90vw; height: 90vw;
    top: -25vw; right: -25vw;
    background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
    animation-duration: 16s;
}
.nebula-2 {
    width: 70vw; height: 70vw;
    bottom: -15vw; left: -15vw;
    background: radial-gradient(circle, rgba(255,255,255,0.10) 0%, transparent 70%);
    animation-duration: 22s;
}
.nebula-3 {
    width: 50vw; height: 50vw;
    top: 35%; left: 35%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    animation-duration: 18s;
}

@keyframes nebulaPulse {
    0% { transform: translate3d(-6%, -6%, 0) scale(1); opacity: 0.35; }
    100% { transform: translate3d(6%, 6%, 0) scale(1.15); opacity: 0.6; }
}

.star-container {
    position: absolute;
    inset: 0;
    z-index: 1;
    transform: translateZ(0);
}

.star {
    position: absolute;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 6px rgba(255,255,255,0.35);
    will-change: transform, opacity;
    transform: translate3d(0, 0, 0) scale(0);
    opacity: 0;
}

@keyframes starTwinkle {
    0%, 100% { opacity: var(--min-opacity, 0.2); transform: translate3d(0,0,0) scale(0.75); }
    50% { opacity: var(--max-opacity, 1); transform: translate3d(0,0,0) scale(1.35); }
}

@keyframes starFloat {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    100% { transform: translate3d(var(--float-x, -30px), var(--float-y, -25px), 0) scale(1); }
}

@keyframes starBirth {
    0% { opacity: 0; transform: translate3d(0,0,0) scale(0); }
    40% { opacity: var(--max-opacity, 0.9); transform: translate3d(0,0,0) scale(1.6); }
    100% { opacity: var(--min-opacity, 0.25); transform: translate3d(0,0,0) scale(1); }
}

.shooting-star {
    position: absolute;
    top: 12%; left: -10%;
    width: 160px; height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.95), transparent);
    border-radius: 2px;
    opacity: 0;
    transform: rotate(-38deg) translate3d(0, 0, 0);
    animation: shoot 12s ease-in-out infinite;
    animation-delay: 5s;
    filter: blur(0.5px);
    z-index: 2;
}

@keyframes shoot {
    0% { opacity: 0; transform: rotate(-38deg) translate3d(0, 0, 0); }
    5% { opacity: 1; }
    12% { opacity: 0; transform: rotate(-38deg) translate3d(95vw, 58vh, 0); }
    100% { opacity: 0; transform: rotate(-38deg) translate3d(95vw, 58vh, 0); }
}

@media (prefers-reduced-motion: reduce) {
    .nebula-layer, .star, .shooting-star { animation: none !important; }
}

.cursor-glow {
    position: fixed;
    width: 480px; height: 480px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 2;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 35%, transparent 70%);
    opacity: 0;
    transition: opacity 0.8s var(--ease-out);
    will-change: transform;
}
body:hover .cursor-glow { opacity: 1; }

.cursor-dot {
    position: fixed;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #fff;
    pointer-events: none;
    z-index: 99999;
    transform: translate(-50%, -50%) scale(1);
    mix-blend-mode: difference;
    opacity: 0;
    transition: opacity 0.3s, transform 0.15s var(--ease-spring);
    will-change: transform;
}
body:hover .cursor-dot { opacity: 1; }
.cursor-dot.hover { transform: translate(-50%, -50%) scale(2.5); }

@media (hover: none) {
    .cursor-glow { display: none; }
    .cursor-dot { display: none; }
}

.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    width: 0%; height: 2px;
    background: linear-gradient(90deg, var(--text-70), var(--text-30));
    z-index: 1001;
    pointer-events: none;
    box-shadow: 0 0 12px rgba(255,255,255,0.2);
}

@media (hover: none) {
    .cursor-glow { display: none; }
}

/* ===== NAV ===== */
#nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 64px; height: 72px;
    background: rgba(0,0,0,0.6);
    -webkit-backdrop-filter: blur(30px);
    backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--line);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.nav-brand {
    font-family: var(--font-en);
    font-size: 16px; font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    text-decoration: none;
}

.nav-items { display: flex; gap: 44px; }

.nav-toggle {
    display: none;
    width: 32px; height: 24px;
    position: relative;
    background: none; border: none;
    cursor: pointer;
    z-index: 1002;
}
.nav-toggle span {
    position: absolute; left: 0;
    width: 100%; height: 2px;
    background: var(--text);
    transition: transform 0.3s var(--ease-out), opacity 0.3s;
}
.nav-toggle span:nth-child(1) { top: 2px; }
.nav-toggle span:nth-child(2) { top: 11px; }
.nav-toggle span:nth-child(3) { top: 20px; }
.nav-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

@media (max-width: 900px) {
    .nav-items {
        position: fixed;
        top: 72px; left: 0; right: 0; bottom: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 40px 64px;
        background: rgba(0,0,0,0.92);
        -webkit-backdrop-filter: blur(30px);
        backdrop-filter: blur(30px);
        transform: translateX(100%);
        transition: transform 0.4s var(--ease-out);
        z-index: 999;
    }
    .nav-items.open { transform: translateX(0); }
    .nav-item {
        font-size: 24px;
        padding: 16px 0;
        width: 100%;
        border-bottom: 1px solid var(--line);
    }
    .nav-item::after { display: none; }
    .nav-toggle { display: block; }
    #nav { padding: 0 24px; }
    .hero { padding: 120px 24px 60px; }
    .section { padding: 120px 24px; }
    .hero-mark { right: 24px; }
    .hero-corner-bl { left: 24px; }
    .hero-corner-br { right: 24px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: clamp(36px, 14vw, 80px); }
    .nav-item { font-size: 20px; }
    .nav-items { padding: 32px 24px; }
}

.nav-item {
    font-family: var(--font-en);
    font-size: 12px; font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-50);
    text-decoration: none;
    padding: 26px 0;
    position: relative;
    transition: color 0.3s var(--ease-out);
}
.nav-item:hover, .nav-item.active { color: var(--text); }
.nav-item::after {
    content: ''; position: absolute; bottom: 18px; left: 0;
    width: 0; height: 1px; background: var(--accent);
    transition: width 0.3s var(--ease);
}
.nav-item:hover::after { width: 100%; }
.nav-item.active::after { width: 100%; }

/* ===== HERO TITLE MOONSHOT SHIMMER ===== */
.hero-title {
    position: relative;
    display: flex;
    flex-direction: column;
    font-family: var(--font-en);
    font-size: clamp(72px, 13vw, 190px);
    font-weight: 700;
    letter-spacing: -0.06em;
    line-height: 0.84;
    text-transform: uppercase;
    color: var(--text);
    margin-top: auto;
    margin-bottom: auto;
    padding-top: 6vh;
    max-width: 1200px;
}

.hero-title-line {
    display: block;
    position: relative;
    opacity: 0;
    color: var(--text);
    transform: translateY(60px);
    animation: titleIn 1s var(--ease-out) forwards;
}
.hero-title-line:nth-child(1) { animation-delay: 0.5s; }
.hero-title-line:nth-child(2) { animation-delay: 0.7s; }

.hero-char {
    display: inline-block;
    position: relative;
    text-align: center;
    transition: transform 0.25s var(--ease-spring), filter 0.25s;
    will-change: transform;
    cursor: default;
}

.hero-char:hover {
    transform: translateY(-6px) scale(1.12);
    filter: brightness(1.2);
}

@media (max-width: 768px) {
    .hero-title { font-size: clamp(42px, 16vw, 120px); }
}

/* ===== HERO BASE ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 3;
    padding: 120px 64px 80px;
    overflow: hidden;
}

.hero-mark {
    position: absolute; top: 120px; right: 64px;
    width: 28px; height: 28px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    z-index: 4;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 1.6s forwards;
}
.hero-mark span {
    background: var(--text-20);
    border-radius: 1px;
    transition: background 0.4s;
}
.hero-mark span:nth-child(2),
.hero-mark span:nth-child(3) { background: var(--text-08); }
.hero:hover .hero-mark span:nth-child(1),
.hero:hover .hero-mark span:nth-child(4) { background: var(--text-50); }

.hero-topline {
    display: flex; align-items: center; gap: 16px;
    font-family: var(--font-en);
    font-size: 11px; font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-50);
    opacity: 0;
    animation: fadeIn 1s var(--ease) 0.4s forwards;
}

.hero-dot {
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-20);
}

.hero-subtitle {
    font-family: var(--font-cn);
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 0.12em;
    color: var(--text-50);
    margin-top: 28px;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 0.9s forwards;
}

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

.hero-bottomline {
    font-family: var(--font-cn);
    font-size: 15px; font-weight: 400;
    letter-spacing: 0.06em;
    color: var(--text-50);
    line-height: 1.8;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 1s forwards;
}
.hero-bottomline p:last-child { opacity: 0.6; }

.hero-scroll {
    position: absolute; bottom: 40px; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    z-index: 4;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 1.4s forwards;
}

.scroll-label {
    font-family: var(--font-mono);
    font-size: 10px; font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-20);
}

.scroll-line {
    width: 1px; height: 48px;
    background: var(--text-08);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    position: absolute; top: -40%; left: 0;
    width: 100%; height: 40%;
    background: var(--text);
    animation: scrollMove 2s ease infinite;
}

@keyframes scrollMove {
    0% { top: -40%; opacity: 0; }
    50% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.hero-corner {
    position: absolute;
    z-index: 4;
    display: flex; flex-direction: column; gap: 6px;
    font-family: var(--font-en);
    font-size: 11px; font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--text-20);
    opacity: 0;
    animation: fadeIn 1s var(--ease) 1.8s forwards;
}
.hero-corner span:first-child { color: var(--text-50); }
.hero-corner-bl { bottom: 40px; left: 64px; }
.hero-corner-br { bottom: 40px; right: 64px; text-align: right; }

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

/* ===== SECTIONS ===== */
.section {
    padding: 180px 64px;
    position: relative; z-index: 3;
}
.section-dark { background: rgba(255,255,255,0.01); }

.section-header {
    max-width: 1400px; margin: 0 auto 100px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--line);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.section-header.revealed {
    opacity: 1;
    transform: translateY(0);
}

.section-header-left {
    display: flex; align-items: baseline; gap: 20px;
}

.section-num {
    font-family: var(--font-mono);
    font-size: 11px; font-weight: 400;
    color: var(--text-20);
    letter-spacing: 0.02em;
    font-variant-numeric: tabular-nums;
}

.section-title {
    font-family: var(--font-en);
    font-size: 11px; font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-50);
}

.section-header-main {
    font-family: var(--font-en);
    font-size: clamp(48px, 6vw, 84px);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.95;
    text-transform: uppercase;
    color: var(--text);
}

.section-header-desc {
    font-family: var(--font-cn);
    font-size: 14px; font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--text-50);
    margin-top: 0;
    line-height: 1.8;
    max-width: 440px;
}

/* ===== PAGE SINGLE ===== */
.page-stack-single {
    max-width: 1000px; margin: 0 auto;
}

.page-figure {
    display: block; margin: 0;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(50px);
    transition: border-color 0.4s, transform 0.6s var(--ease-out), box-shadow 0.6s var(--ease-out), overflow 0.1s;
}
.page-figure.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease), border-color 0.4s, box-shadow 0.6s var(--ease-out), overflow 0.1s;
}
.page-figure.revealed:hover {
    overflow: visible;
    border-color: var(--accent);
    box-shadow: 0 40px 100px rgba(0,0,0,0.65), 0 0 0 1px var(--accent-soft);
    z-index: 10;
}
.page-figure img {
    width: 100%; height: auto; display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    border-radius: 8px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    transition: transform 0.7s var(--ease-out), opacity 0.8s var(--ease);
}
.page-figure.revealed:hover img { transform: scale(1.08) translateY(-8px); }

/* ===== GRID LABEL ===== */
.grid-label {
    max-width: 1000px; margin: 80px auto 48px;
    text-align: center;
}
.grid-label-line {
    display: block; width: 100px; height: 1px;
    background: var(--line); margin: 0 auto;
}
.grid-label-text {
    display: block; margin-top: 16px;
    font-family: var(--font-mono);
    font-size: 10px; font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-20);
}

/* ===== MASONRY GRID ===== */
.masonry-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 1000px; margin: 0 auto;
}

.page-cell {
    margin: 0 auto;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease), border-color 0.4s, box-shadow 0.6s var(--ease-out), overflow 0.1s;
}
.page-cell.revealed {
    opacity: 1;
    transform: translateY(0);
}
.page-cell.revealed:hover {
    overflow: visible;
    border-color: var(--accent);
    box-shadow: 0 40px 100px rgba(0,0,0,0.65), 0 0 0 1px var(--accent-soft);
    z-index: 10;
}
.page-cell img {
    width: 100%; height: auto; display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    border-radius: 6px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    transition: transform 0.7s var(--ease-out), opacity 0.8s var(--ease);
}
.page-cell.revealed:hover img { transform: scale(1.08) translateY(-8px); }

.page-cell:nth-child(even),
.page-cell:nth-child(odd) {
    margin-left: auto;
    margin-right: auto;
}

@media (hover: none) {
    .page-figure.revealed:hover,
    .page-cell.revealed:hover {
        transform: none;
        box-shadow: none;
        overflow: hidden;
    }
    .page-figure.revealed:hover img,
    .page-cell.revealed:hover img { transform: none; }
}

/* ===== EXPERIENCE ACCORDION ===== */
.experience-accordion-hint {
    text-align: center;
    font-family: var(--font-cn);
    font-size: 13px;
    color: var(--text-20);
    letter-spacing: 0.06em;
    margin: 40px auto 20px;
    max-width: 1000px;
}

.experience-accordion {
    max-width: 1000px; margin: 0 auto;
    border-top: 1px solid var(--line);
}

.accordion-item {
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    display: grid;
    grid-template-columns: auto 1fr auto 40px;
    align-items: center;
    gap: 24px;
    padding: 28px 0;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    text-align: left;
    transition: color 0.3s var(--ease-out);
}
.accordion-header:hover .accordion-arrow { color: var(--text); }
.accordion-header:hover .accordion-role { color: var(--text-80); }

.accordion-num {
    font-family: var(--font-en);
    font-size: 18px; font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
    font-variant-numeric: tabular-nums;
    min-width: 32px;
}

.accordion-title {
    font-family: var(--font-en);
    font-size: 18px; font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text);
}

.accordion-role {
    font-family: var(--font-cn);
    font-size: 13px;
    font-weight: 400;
    color: var(--text-50);
    letter-spacing: 0.02em;
    text-align: right;
}

.accordion-arrow {
    font-family: var(--font-en);
    font-size: 20px;
    font-weight: 300;
    color: var(--text-50);
    text-align: right;
    transition: color 0.3s var(--ease-out);
}
.accordion-item.active .accordion-arrow {
    color: var(--accent);
}

.accordion-item.active .accordion-header .accordion-title {
    color: var(--text);
}

.accordion-item.active .accordion-header .accordion-num {
    color: var(--accent);
}
.accordion-content {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.55s var(--ease-out);
}
.accordion-item.active .accordion-content {
    grid-template-rows: 1fr;
}

.accordion-inner {
    overflow: hidden;
    padding: 0 0 40px 74px;
    color: var(--text-80);
    font-size: 14px;
    line-height: 1.8;
}

.accordion-inner p {
    margin-bottom: 16px;
    font-family: var(--font-cn);
}

.accordion-inner ul {
    list-style: none;
    margin: 16px 0;
    padding: 0;
}

.accordion-inner li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 8px;
    font-family: var(--font-cn);
    color: var(--text-50);
}

.accordion-inner li::before {
    content: '';
    position: absolute; left: 0; top: 11px;
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-20);
}

.accordion-stats {
    display: flex; flex-wrap: wrap;
    gap: 40px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}

.accordion-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.accordion-time {
    font-family: var(--font-en);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--text-40);
    text-transform: uppercase;
}

.accordion-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.accordion-tag {
    font-family: var(--font-en);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-60);
    border: 1px solid var(--line);
    border-radius: 100px;
    padding: 4px 10px;
    background: rgba(255,255,255,0.03);
}

.accordion-intro {
    color: var(--text-90);
    margin-bottom: 16px;
    font-family: var(--font-cn);
}

.accordion-list {
    list-style: none;
    margin: 16px 0;
    padding: 0;
}

.accordion-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 8px;
    font-family: var(--font-cn);
    color: var(--text-50);
}

.accordion-list li::before {
    content: '';
    position: absolute; left: 0; top: 11px;
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-20);
}

.stat {
    display: flex; flex-direction: column; gap: 4px;
}

.stat-value {
    font-family: var(--font-en);
    font-size: 28px; font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.stat-label {
    font-family: var(--font-cn);
    font-size: 12px; color: var(--text-50);
    letter-spacing: 0.04em;
}

@media (max-width: 768px) {
    .accordion-header { grid-template-columns: 36px 1fr 40px; gap: 12px; }
    .accordion-role { display: none; }
    .accordion-title { font-size: 15px; }
    .accordion-inner { padding-left: 0; }
    .accordion-stats { flex-direction: column; gap: 20px; }
    .stat-value { font-size: 24px; }
}

/* ===== AI CHAT WIDGET ===== */
.ai-chat-widget {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 1000;
    font-family: var(--font-cn);
}
.ai-chat-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 22px;
    border-radius: 50px;
    border: 1px solid var(--text-20);
    background: rgba(10, 10, 12, 0.85);
    backdrop-filter: blur(20px);
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}
.ai-chat-toggle:hover {
    transform: translateY(-3px) scale(1.03);
    border-color: var(--text-50);
    box-shadow: 0 18px 50px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.08);
}
.ai-chat-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px; height: 22px;
    font-size: 16px;
    color: var(--text);
    animation: starSpin 8s linear infinite;
}
@keyframes starSpin { to { transform: rotate(360deg); } }

.ai-chat-panel {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 360px;
    max-width: calc(100vw - 40px);
    height: 520px;
    max-height: calc(100vh - 100px);
    background: rgba(10, 10, 12, 0.92);
    backdrop-filter: blur(30px);
    border: 1px solid var(--text-16);
    border-radius: 20px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.65);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px) scale(0.96);
    pointer-events: none;
    transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out);
}
.ai-chat-panel.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.ai-chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--text-10);
}
.ai-chat-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--text-20);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 16px;
    color: var(--text);
    flex-shrink: 0;
}
.ai-chat-info { flex: 1; }
.ai-chat-info h4 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}
.ai-chat-info span {
    font-size: 12px;
    color: var(--text-50);
}
.ai-chat-close {
    width: 32px; height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-50);
    font-size: 16px;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
}
.ai-chat-close:hover { color: var(--text); background: var(--text-10); }

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scroll-behavior: smooth;
}
.ai-message { display: flex; }
.ai-message.bot { justify-content: flex-start; }
.ai-message.user { justify-content: flex-end; }
.ai-message-bubble {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}
.ai-message.bot .ai-message-bubble {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--text-10);
    color: var(--text);
    border-top-left-radius: 4px;
}
.ai-message.user .ai-message-bubble {
    background: var(--text);
    color: var(--bg);
    border-top-right-radius: 4px;
}
.ai-message-typing {
    display: flex;
    gap: 4px;
    padding: 18px 16px;
}
.ai-message-typing span {
    width: 6px; height: 6px;
    background: var(--text-50);
    border-radius: 50%;
    animation: typingDot 1.4s infinite ease-in-out both;
}
.ai-message-typing span:nth-child(1) { animation-delay: -0.32s; }
.ai-message-typing span:nth-child(2) { animation-delay: -0.16s; }
@keyframes typingDot {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

.ai-chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 20px 14px;
    border-bottom: 1px solid var(--text-10);
}
.ai-suggestion {
    padding: 8px 12px;
    border-radius: 20px;
    border: 1px solid var(--text-16);
    background: rgba(255,255,255,0.03);
    color: var(--text-70);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}
.ai-suggestion:hover {
    border-color: var(--text);
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
}

.ai-chat-input {
    display: flex;
    gap: 10px;
    padding: 14px 18px 18px;
}
.ai-chat-input input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 24px;
    border: 1px solid var(--text-16);
    background: rgba(255,255,255,0.04);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.ai-chat-input input:focus {
    border-color: var(--text-50);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.06);
}
.ai-chat-input input::placeholder { color: var(--text-40); }
.ai-chat-input button {
    width: 42px; height: 42px;
    border-radius: 50%;
    border: none;
    background: var(--text);
    color: var(--bg);
    font-size: 18px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    flex-shrink: 0;
}
.ai-chat-input button:hover { transform: scale(1.08); background: rgba(255,255,255,0.85); }
.ai-chat-input button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

@media (max-width: 480px) {
    .ai-chat-widget { bottom: 16px; right: 16px; }
    .ai-chat-panel { width: calc(100vw - 32px); height: 480px; }
    .ai-chat-toggle { padding: 12px 16px; }
    .ai-chat-toggle-text { display: none; }
}

/* ===== FOOTER ===== */
.footer {
    padding: 80px 64px;
    position: relative; z-index: 3;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}
.footer-left {
    font-family: var(--font-cn);
    font-size: 14px; font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--text-50);
    display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.footer-left a {
    color: var(--text-50);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-left a:hover { color: var(--text); }

.footer-divider {
    color: var(--text-20);
}
.footer-right {
    font-family: var(--font-en);
    font-size: 11px; font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--text-20);
    text-transform: uppercase;
}

/* ===== LIGHTBOX ===== */
#lightbox {
    position: fixed; inset: 0; z-index: 10001;
    background: rgba(0,0,0,0.96);
    -webkit-backdrop-filter: blur(40px);
    backdrop-filter: blur(40px);
    display: flex; align-items: center; justify-content: center;
    padding: 40px;
    opacity: 0; visibility: hidden;
    transition: all 0.4s var(--ease);
}
#lightbox.active { opacity: 1; visibility: visible; }

.lightbox-img {
    max-width: 92vw; max-height: 92vh;
    object-fit: contain;
    border-radius: 4px;
    opacity: 0; transform: scale(0.96);
    transition: opacity 0.5s var(--ease-spring);
    touch-action: none;
    -webkit-user-drag: none;
    user-select: none;
}
#lightbox.active .lightbox-img { opacity: 1; transform: scale(1); }

.lightbox-stage {
    position: absolute;
    inset: 80px 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: none;
}

@media (max-width: 768px) {
    .lightbox-stage { inset: 60px 0; }
    .lightbox-img { max-width: 100vw; max-height: 100vh; border-radius: 0; }
}

.lightbox-close {
    position: absolute; top: 28px; right: 32px;
    background: none; border: none;
    color: var(--text-20);
    font-family: var(--font-en);
    font-size: 14px; cursor: pointer;
    transition: color 0.3s;
}
.lightbox-close:hover { color: var(--text); }

.lightbox-counter {
    position: absolute; bottom: 28px; left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 11px; color: var(--text-20);
    letter-spacing: 0.05em;
}

.lightbox-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: none; border: none;
    color: var(--text-20);
    font-size: 20px; cursor: pointer;
    padding: 24px;
    transition: color 0.3s;
}
.lightbox-nav:hover { color: var(--text); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
    #nav { padding: 0 40px; }
    .hero { padding: 120px 40px 100px; }
    .hero-mark { top: 100px; right: 40px; }
    .hero-corner { display: none; }
    .hero-title { font-size: clamp(42px, 14vw, 80px); }
    .hero-subtitle { font-size: 13px; margin-top: 20px; letter-spacing: 0.04em; }
    .hero-bottomline { font-size: 13px; }
    .section { padding: 140px 40px; }
    .section-header { grid-template-columns: 1fr; gap: 32px; }
    .masonry-grid { gap: 24px; }
}

@media (max-width: 768px) {
    #nav { padding: 0 24px; height: 60px; -webkit-backdrop-filter: none; backdrop-filter: none; background: rgba(0,0,0,0.92); }
    .nav-items { gap: 20px; }
    .nav-item { font-size: 10px; padding: 22px 0; }
    .hero { padding: 100px 24px 80px; }
    .hero-title { font-size: clamp(36px, 14vw, 64px); }
    .hero-subtitle { font-size: 12px; margin-top: 16px; }
    .hero-bottomline { font-size: 12px; }
    .hero-scroll { left: 24px; transform: none; align-items: flex-start; }
    .section { padding: 100px 24px; }
    .section-header { margin-bottom: 72px; }
    .section-header-main { font-size: clamp(32px, 9vw, 52px); letter-spacing: -0.04em; }
    .masonry-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer { padding: 48px 24px; flex-direction: column; gap: 16px; align-items: flex-start; }
    .footer-left { gap: 12px; font-size: 13px; }
    .accordion-header { grid-template-columns: auto 1fr 40px; gap: 12px; padding: 22px 0; }
    .accordion-role { display: none; }
    .accordion-title { font-size: 14px; line-height: 1.4; }
    .accordion-num { font-size: 14px; min-width: 26px; }
    .accordion-inner { padding-left: 0; }
    .accordion-stats { flex-direction: column; gap: 20px; }
    .stat-value { font-size: 24px; }
    .experience-accordion-hint { font-size: 12px; }
    #lightbox { -webkit-backdrop-filter: none; backdrop-filter: none; background: rgba(0,0,0,0.98); }
}

/* ===== DOWNLOADS ===== */
.download-grid {
    max-width: 1200px; margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.download-card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 280px;
    padding: 36px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text);
    text-decoration: none;
    overflow: hidden;
    transition: border-color 0.4s var(--ease-out), transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), background 0.4s;
    will-change: transform;
}
.download-card::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(138,156,255,0.12) 0%, transparent 55%);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}
.download-card:hover::before { opacity: 1; }
.download-card:hover {
    border-color: var(--accent);
    background: rgba(255,255,255,0.05);
    box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 0 1px var(--accent-soft);
    transform: translateY(-8px) scale(1.02);
}

.download-num {
    font-family: var(--font-en);
    font-size: 13px; font-weight: 600;
    color: var(--text-20);
    letter-spacing: 0.04em;
    margin-bottom: 24px;
}

.download-info { position: relative; z-index: 1; }

.download-label {
    display: block;
    font-family: var(--font-en);
    font-size: 11px; font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-50);
    margin-bottom: 12px;
}

.download-title {
    font-family: var(--font-cn);
    font-size: 32px; font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
    color: var(--text);
}

.download-meta {
    font-family: var(--font-cn);
    font-size: 13px;
    color: var(--text-50);
    letter-spacing: 0.02em;
}

.download-arrow {
    position: absolute;
    bottom: 32px; right: 32px;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    font-size: 18px;
    color: var(--text-50);
    transition: all 0.35s var(--ease-spring);
}
.download-card:hover .download-arrow {
    background: var(--accent);
    border-color: var(--accent);
    color: #000;
    transform: translateY(4px);
}

/* ===== MAGNETIC BUTTONS ===== */
.magnetic {
    transition: transform 0.2s var(--ease-out);
}

/* ===== PARALLAX LAYERS ===== */
[data-parallax] {
    will-change: transform;
    transform: translate3d(0,0,0);
}

/* ===== SECTION HEADER LINE REVEAL ===== */
.section-header {
    position: relative;
}
.section-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0%; height: 1px;
    background: var(--accent);
    transition: width 1s var(--ease-out);
}
.section-header.revealed::after {
    width: 100%;
}

/* ===== DESKTOP ADAPTIVE IMPROVEMENTS ===== */
@media (min-width: 1920px) {
    .hero { padding: 140px 120px 100px; }
    .hero-title { font-size: clamp(80px, 11vw, 220px); max-width: 1600px; }
    .section { padding: 220px 120px; }
    .section-header { max-width: 1600px; gap: 160px; }
    .page-stack-single, .masonry-grid, .experience-accordion, .download-grid { max-width: 1200px; }
    .hero-mark { top: 140px; right: 120px; }
    .hero-corner-bl { left: 120px; }
    .hero-corner-br { right: 120px; }
    #nav { padding: 0 120px; }
}

@media (min-width: 2560px) {
    .hero { padding: 160px 180px 120px; }
    .hero-title { font-size: clamp(96px, 10vw, 260px); }
    .section { padding: 260px 180px; }
    .section-header { max-width: 1800px; }
    .page-stack-single, .masonry-grid, .experience-accordion, .download-grid { max-width: 1400px; }
    #nav { padding: 0 180px; }
}

@media (min-width: 1440px) and (max-width: 1919px) {
    .hero-title { font-size: clamp(72px, 12vw, 170px); }
    .page-stack-single, .masonry-grid, .experience-accordion, .download-grid { max-width: 1100px; }
}

@media (max-width: 1024px) {
    .download-grid { grid-template-columns: 1fr; }
    .download-card { min-height: 200px; }
}

@media (max-width: 768px) {
    .download-grid { gap: 16px; }
    .download-card { padding: 24px; min-height: 180px; }
    .download-title { font-size: 24px; }
    .download-arrow { width: 40px; height: 40px; bottom: 24px; right: 24px; }
}

/* ===== REDUCE MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-parallax] { transform: none !important; }
}

/* ===== PASSWORD GATE ===== */
.password-gate {
    position: fixed; inset: 0;
    z-index: 100000;
    background: #000;
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.6s var(--ease-out), visibility 0.6s;
}
.password-gate.hidden {
    opacity: 0; visibility: hidden;
    pointer-events: none;
}
.password-gate-content {
    text-align: center;
    padding: 40px;
    max-width: 420px;
    width: 90%;
}
.password-gate-mark {
    width: 32px; height: 32px;
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 2px;
    margin: 0 auto 40px;
}
.password-gate-mark span {
    background: var(--text-20);
    border-radius: 1px;
}
.password-gate-mark span:nth-child(2),
.password-gate-mark span:nth-child(3) { background: var(--text-08); }
.password-gate-title {
    font-family: var(--font-en);
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 16px;
}
.password-gate-subtitle {
    font-family: var(--font-cn);
    font-size: 14px;
    color: var(--text-50);
    letter-spacing: 0.08em;
    margin-bottom: 48px;
}
.password-form {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.password-input {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px 18px;
    color: var(--text);
    font-family: var(--font-en);
    font-size: 14px;
    letter-spacing: 0.04em;
    outline: none;
    transition: border-color 0.3s, background 0.3s;
}
.password-input:focus {
    border-color: var(--accent);
    background: rgba(255,255,255,0.08);
}
.password-input::placeholder { color: var(--text-20); }
.password-submit {
    background: var(--text);
    color: #000;
    border: none;
    border-radius: 8px;
    padding: 14px 28px;
    font-family: var(--font-cn);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
}
.password-submit:hover { transform: scale(1.03); background: var(--text-90); }
.password-error {
    color: #ff6b6b;
    font-size: 13px;
    margin-top: 20px;
    opacity: 0;
    transition: opacity 0.3s;
}
.password-error.show { opacity: 1; }

@media (max-width: 480px) {
    .password-form { flex-direction: column; }
    .password-submit { width: 100%; }
}