/* --- 字体与基础设置 --- */
@import url('https://npm.elemecdn.com/lxgw-wenkai-screen-webfont/style.css');

:root {
    --gold: #FFD700;
    --dark-bg: #050505;
    --box-size: 200px;
}

body {
    margin: 0; background-color: var(--dark-bg); color: white;
    font-family: 'LXGW WenKai Screen', sans-serif; overflow-x: hidden; width: 100vw; 
    transition: background 2s ease;
    cursor: url('data:image/svg+xml;utf8,<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><circle cx="12" cy="12" r="4" fill="%23FFD700" fill-opacity="0.8"/><circle cx="12" cy="12" r="8" stroke="%23FFD700" stroke-width="1" stroke-opacity="0.5"/></svg>') 12 12, auto;
}

button:hover, a:hover, .poster-card:hover, .gift-box:hover, #music-btn:hover {
    cursor: url('data:image/svg+xml;utf8,<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><circle cx="12" cy="12" r="6" fill="%23FFD700"/><path d="M12 2V6M12 18V22M2 12H6M18 12H22" stroke="%23FFD700" stroke-width="2"/></svg>') 12 12, pointer;
}

html.midnight-mode body { background-color: #000000; }
html.midnight-mode #particleCanvas { opacity: 0.6; }
.midnight-greeting { display: none; text-align: center; color: #a29bfe; font-size: 1rem; margin-top: -20px; margin-bottom: 30px; opacity: 0; animation: fadeIn 2s forwards 1s; }
html.midnight-mode .midnight-greeting { display: block; }

html.wall-mode #intro-section { display: none !important; }
html.wall-mode #timeline-section { display: block !important; opacity: 1 !important; }

/* ✨ 视觉优化：中心区域更干净 */
#particleCanvas { 
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; 
    background: radial-gradient(circle at center, #2a1b3d 0%, #000 90%); 
    opacity: 0.8; transition: opacity 2s; 
}

#hesitation-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #000; z-index: 99999; display: flex; flex-direction: column; justify-content: center; align-items: center; transition: opacity 1.5s ease; }
.hesitation-text { font-size: 1.5rem; color: #aaa; letter-spacing: 3px; margin-bottom: 20px; opacity: 0; animation: textFadeIn 1s forwards 0.5s; }
.hesitation-sub { font-size: 0.9rem; color: #555; opacity: 0; animation: textFadeIn 1s forwards 1.5s; }
@keyframes textFadeIn { to { opacity: 1; } }

#music-btn { position: fixed; top: 30px; right: 30px; z-index: 100; cursor: pointer; opacity: 0.6; font-size: 1.5rem; transition: 0.3s; animation: bounceHint 2s infinite; }
#music-btn:active { transform: scale(0.8); }
#music-btn.playing { animation: spin 4s linear infinite !important; opacity: 1; color: var(--gold); text-shadow: 0 0 15px var(--gold); }
@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes bounceHint { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }

#intro-section { height: 100vh; width: 100%; display: flex; justify-content: center; align-items: center; position: fixed; z-index: 50; transition: all 1s ease; }
.scene { width: var(--box-size); height: var(--box-size); perspective: 1200px; position: relative; }
.gift-box { width: 100%; height: 100%; position: relative; transform-style: preserve-3d; transform: rotateX(-20deg) rotateY(45deg); transition: transform 1s; cursor: pointer; animation: floatBox 3s infinite; }
.gift-box.locked { filter: grayscale(100%); cursor: not-allowed; animation: none; opacity: 0.5; }
@keyframes floatBox { 0%,100%{transform:rotateX(-20deg) rotateY(45deg) translateY(0);} 50%{transform:rotateX(-20deg) rotateY(45deg) translateY(-15px);} }
.face { position: absolute; width: 100%; height: 100%; background: linear-gradient(135deg, #FFD700 10%, #FFC107 50%, #DAA520 100%); border: 1px solid #B8860B; }
.front::before, .back::before, .left::before, .right::before { content: ''; position: absolute; width: 25px; height: 100%; left: 50%; background: linear-gradient(to right, #d63031, #ff7675, #d63031); transform: translateX(-50%); box-shadow: 0 0 2px rgba(0,0,0,0.2); }
.front{transform:translateZ(100px);} .back{transform:rotateY(180deg) translateZ(100px);} .right{transform:rotateY(90deg) translateZ(100px);} .left{transform:rotateY(-90deg) translateZ(100px);} .bottom{transform:rotateX(-90deg) translateZ(100px); background:#8B4513;}
.top{transform:rotateX(90deg) translateZ(100px); background:radial-gradient(circle, #ffe066, #FFD700); border-bottom:2px solid #B8860B; transition:0.8s; z-index:10;}
.ribbon-cross-v{position:absolute; width:25px; height:100%; left:50%; transform:translateX(-50%); background:linear-gradient(to right, #d63031, #ff7675, #d63031);}
.ribbon-cross-h{position:absolute; width:100%; height:25px; top:50%; transform:translateY(-50%); background:linear-gradient(to bottom, #d63031, #ff7675, #d63031);}
.bow{position:absolute; top:50%; left:50%; transform:translate(-50%, -50%) rotateX(-90deg); font-size:65px; z-index:20; animation:pulseBow 2s infinite;}
@keyframes pulseBow{0%,100%{transform:translate(-50%, -50%) rotateX(-90deg) scale(1);} 50%{transform:translate(-50%, -50%) rotateX(-90deg) scale(1.1);}}
.gift-box.open .top{transform:rotateX(120deg) translateZ(300px) rotateZ(15deg); opacity:0;}
.vanish { opacity: 0.05 !important; pointer-events: none; filter: blur(20px) grayscale(100%); transform: scale(3) rotateZ(10deg); transition: all 2s ease; }
.click-hint { position: absolute; bottom: -80px; width: 100%; text-align: center; color: #888; font-size: 0.9rem; letter-spacing: 2px; animation: textBreathe 3s ease-in-out infinite; }
@keyframes textBreathe { 0%, 100% { opacity: 0.4; transform: scale(0.98); } 50% { opacity: 1; transform: scale(1); text-shadow: 0 0 10px rgba(255,255,255,0.3); } }

#timeline-section { position: relative; z-index: 10; padding: 60px 20px 150px 20px; max-width: 1200px; margin: 0 auto; opacity: 0; transition: opacity 1s; background: radial-gradient(ellipse at bottom, rgba(255, 215, 0, 0.05) 0%, transparent 60%); background-position: bottom center; background-repeat: no-repeat; background-size: 100% 300px; }
.hidden { display: none !important; }

.wall-title { text-align: center; font-size: 5rem; margin: 0 0 40px 0; font-weight: 900; color: rgba(255, 255, 255, 0.05); letter-spacing: 10px; font-family: Arial, sans-serif; pointer-events: none; opacity: 0; animation: fadeInTitle 2s forwards 1s; }
@keyframes fadeInTitle { to { opacity: 1; } }

.letter-box { text-align: center; color: var(--neon-blue); font-size: 1.5rem; margin-bottom: 50px; min-height: 40px; letter-spacing: 2px; background: linear-gradient(90deg, transparent, rgba(0, 243, 255, 0.05), transparent); padding: 10px 0; text-shadow: 0 0 15px var(--neon-blue); position: relative; margin-top: 20px;}
.letter-box::before, .letter-box::after { content: ''; position: absolute; left: 50%; transform: translateX(-50%); width: 200px; height: 1px; background: linear-gradient(90deg, transparent, var(--neon-blue), transparent); }
.letter-box::before { top: 0; } .letter-box::after { bottom: 0; }

#timelineContainer { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; perspective: 1000px; }

/* --- 卡片 (3D & 物理属性) --- */
.poster-card { width: 260px; height: 400px; background: radial-gradient(circle at top right, #222, #111); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; position: relative; overflow: hidden; cursor: pointer; opacity: 0; transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s ease, filter 0.5s ease; transform-style: preserve-3d; box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 20px rgba(255, 215, 0, 0.05); }

/* ✨ 优化：已读标记（金色圆点） */
.poster-card.visited::after {
    content: ''; position: absolute; top: 15px; left: 15px; 
    width: 8px; height: 8px; background-color: var(--gold); border-radius: 50%;
    box-shadow: 0 0 10px var(--gold), 0 0 20px var(--gold); z-index: 10;
    opacity: 0; animation: fadeInDot 0.5s ease forwards;
}
@keyframes fadeInDot { from { opacity: 0; transform: scale(0); } to { opacity: 0.8; transform: scale(1); } }

/* ✨ 优化：已读卡片呼吸光晕 */
.poster-card.visited {
    border-color: rgba(255, 215, 0, 0.8);
    box-shadow: 0 0 25px rgba(255, 215, 0, 0.2);
    animation: goldBreath 4s ease-in-out infinite alternate;
}
@keyframes goldBreath {
    0% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.15); border-color: rgba(255, 215, 0, 0.5); }
    100% { box-shadow: 0 0 40px rgba(255, 215, 0, 0.3); border-color: rgba(255, 215, 0, 0.9); }
}

.poster-card.worn-out { filter: grayscale(80%) brightness(0.7) !important; border-color: #444 !important; box-shadow: none !important; animation-duration: 10s !important; }
.poster-card.worn-out::after { content: ''; }
.poster-card.worn-out:hover { transform: translateY(-2px) scale(1.01) !important; box-shadow: 0 5px 10px rgba(255,255,255,0.1) !important; }

.card-heavy { border-bottom: 3px solid #555; }
.card-light { border-bottom: 3px solid var(--neon-blue); animation: lightFloat 6s infinite; }
@keyframes lightFloat { 0%,100%{transform:translateY(0);} 50%{transform:translateY(-8px);} }
.card-future { border: 1px dashed var(--gold); filter: blur(8px) grayscale(80%); transition: all 0.8s ease; }
.card-future:hover { filter: blur(0) grayscale(0); }

/* ✨ 优化：错位排版 (打破秩序) */
/* 偶数个卡片向下偏移一点，制造呼吸感 */
.poster-card:nth-child(even) { margin-top: 40px; }

.poster-img { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; transition: 0.5s; filter: grayscale(40%); transform: translateZ(-20px); }
.poster-overlay { position: absolute; bottom: 0; left: 0; width: 100%; padding: 20px; background: linear-gradient(to top, rgba(0,0,0,0.95), transparent); transform: translateZ(20px); box-sizing: border-box; }
.poster-year { position: absolute; top: 15px; right: 15px; font-size: 2.5rem; font-weight: bold; color: rgba(255,255,255,0.15); transform: translateZ(10px); transition: color 0.3s; }
.poster-title { margin: 0; color: #FFD700; font-size: 1.6rem; text-shadow: 0 2px 5px rgba(0,0,0,0.5); }
.poster-desc { color: #ccc; font-size: 0.9rem; margin-top: 8px; line-height: 1.4; }

.poster-card:hover { transform: translateY(-10px) scale(1.03); box-shadow: 0 15px 40px rgba(255, 215, 0, 0.2); border-color: rgba(255, 215, 0, 0.5); z-index: 10; }
.poster-card:hover .poster-img { opacity: 1; filter: grayscale(0); }
.poster-card:hover .poster-year { color: #FFD700; opacity: 1; }
.card-enter { animation: slideUp 0.8s ease forwards; }
@keyframes slideUp { from { transform: translateY(100px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.final-trigger { text-align: center; margin-top: 100px; opacity: 0; transition: opacity 1s; }
.final-btn { background: transparent; border: 1px solid var(--gold); color: var(--gold); padding: 15px 40px; font-size: 1.2rem; border-radius: 50px; cursor: pointer; transition: 0.5s; font-family: inherit; opacity: 0; pointer-events: none; transition: opacity 1s; }
.final-btn.visible { opacity: 1; pointer-events: all; }
.final-btn:hover { background: var(--gold); color: #000; box-shadow: 0 0 30px var(--gold); transform: scale(1.05); }
.final-btn.glowing { animation: pulseBtn 1.5s infinite; }
@keyframes pulseBtn { 0%,100%{transform:scale(1);} 50%{transform:scale(1.05); box-shadow:0 0 30px var(--gold);} }
.final-btn.disabled { border-color: #555; color: #555; cursor: default; pointer-events: none; box-shadow: none; transform: none; animation: none; }

#final-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #000; z-index: 9999; display: flex; justify-content: center; align-items: center; opacity: 0; pointer-events: none; transition: opacity 2s; flex-direction: column; }
#final-text { text-align: center; color: #fff; font-size: 1.8rem; line-height: 2.5; }
.final-line { opacity: 0; transform: translateY(20px); animation: fadeInUp 1.5s forwards; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.9); z-index: 2000; justify-content: center; align-items: center; }
.modal.show { display: flex; animation: fadeIn 0.3s; }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
.modal-content { background: #1a1a1a; padding: 30px; width: 85%; max-width: 600px; border-radius: 10px; border: 1px solid #FFD700; text-align: center; }
.modal-img { max-width: 100%; max-height: 300px; border-radius: 5px; margin-bottom: 20px; object-fit: contain;}
.close-btn { position: absolute; top: 10px; right: 20px; font-size: 30px; cursor: pointer; color: #666; }

#backBtn { position: fixed; top: 20px; left: 20px; background: rgba(0,0,0,0.5); color: #FFD700; border: 1px solid #FFD700; padding: 8px 20px; border-radius: 20px; cursor: pointer; z-index: 100; backdrop-filter: blur(5px); }

@media (max-width: 768px) {
    :root { --box-size: 160px; }
    .poster-card { width: 90%; height: 400px; }
    .poster-card:nth-child(even) { margin-top: 0; } /* 手机上取消错位，否则太乱 */
    .wall-title { font-size: 3rem; margin-bottom: 30px; }
    .letter-box { font-size: 1.2rem; }
}