/* ===== Luxury Black-Gold Resume ===== */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500&family=Jost:wght@200;300;400;500;600&display=swap');

:root {
  --black:#0a0a0a;--black-warm:#111;--black-card:#1a1a1a;
  --gold:#c9a84c;--gold-light:#d4af37;--gold-pale:#e8d5a3;
  --gold-dim:#8b7340;--text-body:#b8b0a0;--text-muted:#7a7260;
  --white-soft:#f8f5f0;
  --border-gold:rgba(201,168,76,.3);--border-gold-light:rgba(201,168,76,.12);
  --font-display:'Cormorant Garamond','Noto Serif SC',serif;
  --font-body:'Jost','Noto Sans SC',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-snap-type:y mandatory;overflow-y:scroll;scrollbar-width:thin;scrollbar-color:var(--gold-dim) var(--black)}
body{background:var(--black);color:var(--text-body);font-family:var(--font-body);font-weight:300;line-height:1.65;-webkit-font-smoothing:antialiased}
body::after{content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.035;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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");background-repeat:repeat;background-size:256px 256px}

/* Nav */
.top-nav{position:fixed;top:0;left:0;right:0;z-index:1000;padding:2.5vh 5vw;transition:background .4s,padding .4s}
.top-nav.scrolled{background:rgba(5,5,5,.92);backdrop-filter:blur(20px);padding:1.8vh 5vw;border-bottom:1px solid var(--border-gold-light)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}
.nav-logo{font-family:var(--font-display);font-size:1.4rem;color:var(--gold);letter-spacing:.15em;font-weight:400}
.nav-links{display:flex;gap:3vw}
.nav-link{font-family:var(--font-body);font-size:.75rem;font-weight:400;letter-spacing:.12em;color:var(--text-muted);text-decoration:none;text-transform:uppercase;position:relative;padding:4px 0;transition:color .3s}
.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:1px;background:var(--gold);transition:width .3s}
.nav-link:hover,.nav-link.active{color:var(--gold)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-sep{width:1px;height:16px;background:var(--border-gold);align-self:center}
.nav-portfolio{font-size:.7rem!important;letter-spacing:.1em!important}

/* Slides */
.slide{width:100vw;height:100vh;scroll-snap-align:start;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;padding:8vh 8vw;padding-top:12vh}
.slide::before{content:'';position:absolute;top:4vh;left:4vw;width:50px;height:50px;border-left:1px solid var(--border-gold);border-top:1px solid var(--border-gold);pointer-events:none}
.slide::after{content:'';position:absolute;bottom:4vh;right:4vw;width:50px;height:50px;border-right:1px solid var(--border-gold);border-bottom:1px solid var(--border-gold);pointer-events:none}
.slide-inner{width:100%;max-width:1200px;position:relative;z-index:1}

/* Typography */
h1,h2,h3,h4{font-family:var(--font-display);color:var(--white-soft);font-weight:400;letter-spacing:.03em}
.gold-accent{color:var(--gold)}
.section-tag{font-family:var(--font-body);font-size:10px;font-weight:400;letter-spacing:.35em;text-transform:uppercase;color:var(--gold);margin-bottom:1.5vh}
.section-title{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:300;margin-bottom:.5vh}
.gold-line{width:50px;height:1px;background:linear-gradient(90deg,var(--gold),transparent);margin:2vh 0}
.gold-line.center{margin:2vh auto;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.gold-line.long{width:100px}
.sub{font-size:.78rem;color:var(--text-muted);letter-spacing:.05em;margin-bottom:1.5vh}
.gold-bullets{list-style:none}
.gold-bullets li{position:relative;padding-left:16px;margin-bottom:.8vh;font-size:.8rem;color:var(--text-body);line-height:1.55}
.gold-bullets li::before{content:'';position:absolute;left:0;top:.55em;width:5px;height:5px;border:1px solid var(--gold);border-radius:50%}

/* Hero */
#hero{background:radial-gradient(ellipse at 50% 35%,rgba(201,168,76,.07) 0%,transparent 65%)}
.hero-content{text-align:center}
.hero-name{font-size:clamp(3.5rem,7vw,7rem);font-weight:300;letter-spacing:.1em;line-height:1.1;color:var(--gold);font-family:var(--font-display);margin-bottom:2vh;opacity:0;animation:fadeUp 1.2s .3s forwards}
.hero-subtitle{font-size:clamp(.85rem,1.2vw,1.1rem);font-weight:300;letter-spacing:.15em;color:var(--text-body);margin-bottom:2.5vh;opacity:0;animation:fadeUp 1.2s .6s forwards}
.hero-en{font-family:var(--font-display);font-size:clamp(.75rem,1vw,.95rem);font-weight:300;letter-spacing:.4em;color:var(--gold-dim);margin-bottom:4vh;opacity:0;animation:fadeUp 1.2s .9s forwards}
.hero-contact{font-size:.75rem;letter-spacing:.1em;color:var(--text-muted);margin-bottom:3vh;opacity:0;animation:fadeUp 1.2s 1.2s forwards}
.hero-contact span{margin:0 10px}
.hero-eval{max-width:650px;margin:0 auto;padding:2.5vh 2vw;border:1px solid var(--border-gold-light);border-left:1px solid var(--gold);opacity:0;animation:fadeUp 1.2s 1.5s forwards}
.hero-eval p{font-size:.78rem;color:var(--text-body);line-height:1.7;font-style:italic}
.scroll-hint{position:absolute;bottom:3vh;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:6px;opacity:0;animation:fadeUp 1.2s 1.8s forwards}
.scroll-hint span{font-size:.55rem;letter-spacing:.25em;color:var(--text-muted)}
.scroll-hint .arrow{width:1px;height:25px;background:linear-gradient(to bottom,var(--gold),transparent);position:relative;overflow:hidden}
.scroll-hint .arrow::after{content:'';position:absolute;top:-100%;left:0;width:100%;height:100%;background:var(--gold);animation:scrollArrow 2s infinite}

/* Education */
#education{background:var(--black-warm)}
.edu-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:3vw;align-items:center}
.edu-photo{display:flex;flex-direction:column;align-items:center}
.photo-frame{position:relative;width:65%;max-width:220px;overflow:hidden}
.photo-frame::before{content:'';position:absolute;inset:-4px;border:1px solid var(--border-gold);z-index:1;pointer-events:none;opacity:.5}
.photo-frame img{width:100%;aspect-ratio:3/4;object-fit:cover;display:block;border:1px solid var(--border-gold-light)}
.photo-caption{font-family:var(--font-display);font-size:.8rem;color:var(--gold-dim);letter-spacing:.2em;margin-top:1.5vh;font-style:italic}
.edu-block{margin-bottom:2.5vh}
.edu-block h3{font-size:1.4rem;font-weight:400;margin-bottom:.2vh}

/* Internship */
#internship{background:radial-gradient(ellipse at 30% 50%,rgba(201,168,76,.04) 0%,transparent 60%)}
.intern-header{display:flex;align-items:baseline;gap:1.5vw;flex-wrap:wrap;margin-bottom:2.5vh}
.intern-header h3{font-size:1.6rem;font-weight:400}
.intern-company{font-size:.8rem;color:var(--gold);font-family:var(--font-display);font-style:italic}
.intern-meta{font-size:.7rem;color:var(--text-muted);letter-spacing:.08em;margin-left:auto}
.intern-split{display:grid;grid-template-columns:1fr 1fr;gap:2.5vw;align-items:start;margin-bottom:3vh}
.intern-video video{width:100%;border:1px solid var(--border-gold-light);background:#000;outline:none}
.video-caption{font-family:var(--font-display);font-size:.72rem;color:var(--gold-dim);text-align:center;margin-top:1vh;font-style:italic;letter-spacing:.05em}
.intern-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.2vw}
.intern-item{background:var(--black-card);border:1px solid var(--border-gold-light);padding:2.5vh 1.5vw;transition:border-color .4s}
.intern-item:hover{border-color:var(--border-gold)}
.intern-num{font-family:var(--font-display);font-size:1.8rem;color:var(--gold);opacity:.25;line-height:1;margin-bottom:.8vh}
.intern-item h4{font-size:.85rem;font-weight:500;margin-bottom:1vh}
.intern-item p{font-size:.72rem;color:var(--text-body);line-height:1.55}
.intern-side-card{background:var(--black-card);border:1px solid var(--border-gold-light);padding:2.5vh 2vw;border-left:1px solid var(--gold)}
.intern-side-card h3{font-size:1.2rem;font-weight:400;margin-bottom:.2vh}
.intern-side-text{font-size:.78rem;color:var(--text-body);line-height:1.6;margin-top:1vh}

/* Entrepreneurship */
#entrepreneurship{background:var(--black-warm)}
.ent-main{margin-bottom:3vh}
.ent-header{display:flex;align-items:baseline;gap:1.5vw;flex-wrap:wrap;margin-bottom:2vh}
.ent-header h3{font-size:1.6rem;font-weight:400}
.ent-role{font-size:.8rem;color:var(--gold);font-family:var(--font-display);font-style:italic}
.ent-date{font-size:.7rem;color:var(--text-muted);letter-spacing:.1em;margin-left:auto}
.ent-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5vw}
.ent-card{background:var(--black-card);border:1px solid var(--border-gold-light);padding:2.5vh 1.8vw;transition:border-color .4s}
.ent-card:hover{border-color:var(--border-gold)}
.ent-num{font-family:var(--font-display);font-size:2rem;color:var(--gold);opacity:.25;line-height:1;margin-bottom:.8vh}
.ent-card h4{font-size:.9rem;font-weight:500;margin-bottom:1vh}
.ent-card p{font-size:.74rem;color:var(--text-body);line-height:1.6}
.ent-sub{margin-bottom:2vh}
.ent-sub h3{font-size:1.2rem;font-weight:400;margin-bottom:.2vh}

/* ===== Portfolio Pages ===== */
.portfolio-slide{background:var(--black-warm)}

/* 分类索引标签 */
.pf-cat{position:absolute;top:6vh;right:4vw;z-index:2}
.pf-cat span{font-family:var(--font-body);font-size:9px;font-weight:400;letter-spacing:.25em;text-transform:uppercase;color:var(--gold);border:1px solid var(--border-gold);padding:4px 14px}

.pf-single{display:grid;grid-template-columns:1.2fr .8fr;gap:4vw;align-items:center}
.pf-split{display:grid;grid-template-columns:.9fr 1.1fr;gap:4vw;align-items:center}

/* Media containers */
.pf-media{position:relative;overflow:hidden;border:1px solid var(--border-gold-light);background:#000}
.pf-media.landscape{aspect-ratio:16/9}
.pf-media.portrait{aspect-ratio:9/16;max-height:55vh;margin:0 auto}

/* 横屏 cover，竖屏 contain 不裁切 */
.pf-media.landscape video,
.pf-media.landscape img{width:100%;height:100%;object-fit:cover;display:block}
.pf-media.portrait video,
.pf-media.portrait img{width:100%;height:100%;object-fit:contain;display:block;background:var(--black)}

/* Info */
.pf-info h2{font-size:clamp(1.6rem,2.5vw,2.2rem);font-weight:300;margin-bottom:.5vh}
.pf-sub{font-size:.8rem;color:var(--gold);font-family:var(--font-display);font-style:italic}
.pf-desc{font-size:.82rem;color:var(--text-body);line-height:1.7;margin-top:1.5vh}

/* IP 页面：视频左 + 右侧文字+截图 */
.pf-ip-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:3vw;align-items:start}
.pf-ip-right{display:flex;flex-direction:column;height:100%}
.pf-ip-right .pf-info{margin-bottom:auto}
.pf-ip-right .pf-info h2{font-size:clamp(1.4rem,2.2vw,2rem)}

/* Data strip: 运营数据截图横排，紧凑排列 */
.data-strip{display:flex;gap:.6vw;margin-top:2vh}
.data-item{flex:1;min-width:0;max-height:26vh;border:1px solid var(--border-gold-light);overflow:hidden;background:var(--black-card);transition:border-color .4s}
.data-item:hover{border-color:var(--border-gold)}
.data-item img{width:100%;height:100%;object-fit:contain;display:block;padding:2px}

/* Fashion grid */
.fashion-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1.2vw}
.fashion-item{position:relative;overflow:hidden;border:1px solid var(--border-gold-light);aspect-ratio:3/4;transition:border-color .4s,transform .4s}
.fashion-item:hover{border-color:var(--gold);transform:translateY(-3px)}
.fashion-item img{width:100%;height:100%;object-fit:contain;display:block;background:var(--black-card)}
.fashion-item span{position:absolute;bottom:0;left:0;right:0;padding:1vh .8vw;background:linear-gradient(transparent,rgba(0,0,0,.85));font-size:.65rem;color:var(--gold-pale);letter-spacing:.08em;text-align:center}

/* Data analysis gallery */
.data-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2vw}
.data-gallery-item{position:relative;overflow:hidden;border:1px solid var(--border-gold-light);aspect-ratio:4/3;transition:border-color .4s,transform .4s}
.data-gallery-item:hover{border-color:var(--gold);transform:translateY(-3px)}
.data-gallery-item img{width:100%;height:100%;object-fit:contain;display:block;background:var(--black-card);padding:6px}
.data-gallery-item span{position:absolute;bottom:0;left:0;right:0;padding:1vh .8vw;background:linear-gradient(transparent,rgba(0,0,0,.85));font-size:.65rem;color:var(--gold-pale);letter-spacing:.08em;text-align:center}

/* Skills */
#skills{background:radial-gradient(ellipse at 70% 50%,rgba(201,168,76,.04) 0%,transparent 60%)}
.skills-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:5vw}
.skill-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:1.5vh}
.skill-tag{font-size:.7rem;padding:5px 14px;border:1px solid var(--border-gold);color:var(--gold-pale);letter-spacing:.05em;transition:all .3s}
.skill-tag:hover{background:rgba(201,168,76,.1);border-color:var(--gold)}
.lang-row{display:flex;gap:3vw;margin-top:1vh}
.lang-name{font-size:.8rem;color:var(--white-soft);font-family:var(--font-display)}
.lang-level{font-size:.68rem;color:var(--text-muted)}
.hobby-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:1vh}
.hobby-tag{font-size:.68rem;color:var(--text-muted);padding:3px 10px;border:1px solid var(--border-gold-light)}

/* Animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes scrollArrow{0%{top:-100%}100%{top:100%}}
.reveal{opacity:0;transform:translateY(35px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}

/* Responsive */
@media(max-width:768px){
  .slide{padding:5vh 5vw}
  .slide::before,.slide::after{display:none}
  .nav-links{gap:4vw}
  .nav-link{font-size:.65rem}
  .hero-name{font-size:2.5rem}
  .ent-cards{grid-template-columns:1fr}
  .intern-split,.intern-grid-2{grid-template-columns:1fr}
  .pf-single,.pf-split{grid-template-columns:1fr}
  .edu-layout{grid-template-columns:1fr}
  .edu-photo{max-width:160px;margin:0 auto}
  .pf-ip-layout{grid-template-columns:1fr}
  .pf-media.portrait{max-height:40vh}
  .data-strip{flex-wrap:wrap}
  .data-item{flex:0 0 48%;max-height:14vh}
  .fashion-grid{grid-template-columns:repeat(3,1fr)}
  .data-gallery{grid-template-columns:repeat(2,1fr)}
  .skills-layout{grid-template-columns:1fr}
}