/* ============================================================
   氧摄影工作室 - Oxygen Studio
   杂志编辑风 · 暗色主题 · 呼吸感排版
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg: #0d0d0d;
  --bg-alt: #141414;
  --bg-card: #1a1a1a;
  --text: #e8e4e0;
  --text-dim: #8a8580;
  --text-muted: #5c5752;
  --accent: #c9a87c;
  --accent-dim: #8b6f4e;
  --border: #2a2520;
  --border-light: #1f1b18;
  --radius: 4px;
  --radius-lg: 12px;
  --font-serif: 'Georgia', 'Times New Roman', 'Noto Serif SC', serif;
  --font-sans: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
  --max-width: 1320px;
  --gap: clamp(20px, 4vw, 60px);
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}

/* --- Typography --- */
h1,h2,h3,h4{font-weight:400;line-height:1.2}
h1{font-size:clamp(2.2rem,5vw,4.5rem);font-family:var(--font-serif);letter-spacing:-0.02em}
h2{font-size:clamp(1.6rem,3vw,2.6rem);font-family:var(--font-serif);letter-spacing:-0.01em}
h3{font-size:clamp(1.1rem,2vw,1.5rem)}
.serif{font-family:var(--font-serif)}
.mono{font-family:var(--font-mono);font-size:0.8rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent)}
.label{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--text-muted)}

/* --- Scrollbar --- */
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border)}

/* ============================================================
   HEADER - 极简导航
   ============================================================ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:24px clamp(20px,5vw,60px);
  display:flex;justify-content:space-between;align-items:center;
  transition:background 0.4s,padding 0.4s;
  mix-blend-mode:difference;
}
.header.scrolled{background:rgba(13,13,13,0.95);backdrop-filter:blur(20px);padding:16px clamp(20px,5vw,60px);mix-blend-mode:normal}
.logo{font-family:var(--font-serif);font-size:1.4rem;letter-spacing:0.04em;color:var(--text)}
.logo span{color:var(--accent)}
.nav{display:flex;gap:40px;align-items:center}
.nav a{font-size:0.85rem;letter-spacing:0.06em;position:relative;transition:color 0.3s;text-transform:uppercase}
.nav a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:1px;background:var(--accent);transition:width 0.3s}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav a:hover,.nav a.active{color:var(--accent)}
.menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;z-index:101}
.menu-btn span{width:24px;height:1px;background:var(--text);transition:all 0.3s}

/* ============================================================
   HERO - 全屏大图
   ============================================================ */
.hero{
  position:relative;height:100vh;min-height:600px;
  display:flex;align-items:flex-end;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background:linear-gradient(135deg,#1a1510 0%,#0d0d0d 30%,#0a0a0a 60%,#14100c 100%);
  z-index:0;
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse at 30% 50%,rgba(201,168,124,0.08) 0%,transparent 60%),
             radial-gradient(ellipse at 70% 30%,rgba(201,168,124,0.04) 0%,transparent 50%);
}
.hero-bg-pattern{
  position:absolute;inset:0;opacity:0.03;
  background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='none' stroke='%23c9a87c' stroke-width='0.5'/%3E%3C/svg%3E");
  background-size:60px 60px;
}
.hero-content{
  position:relative;z-index:2;
  padding:clamp(40px,8vw,120px) clamp(20px,5vw,60px);
  max-width:var(--max-width);
  width:100%;margin:0 auto;
}
.hero-eyebrow{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.2em;text-transform:uppercase;color:var(--accent);margin-bottom:20px}
.hero h1{max-width:700px;margin-bottom:16px;line-height:1.1}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-desc{max-width:440px;color:var(--text-dim);font-size:1rem;line-height:1.8;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;font-size:0.85rem;letter-spacing:0.06em;transition:all 0.3s;border:1px solid transparent}
.btn-primary{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.btn-primary:hover{background:transparent;color:var(--accent)}
.btn-outline{border-color:var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.hero-scroll{
  position:absolute;bottom:40px;left:50%;transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  animation:bounce 2s infinite;
  color:var(--text-muted);font-size:0.7rem;letter-spacing:0.1em;
}
.hero-scroll span{width:1px;height:40px;background:var(--text-muted)}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ============================================================
   SECTIONS - 通用
   ============================================================ */
.section{padding:clamp(60px,10vw,140px) clamp(20px,5vw,60px)}
.section-label{display:flex;align-items:center;gap:16px;margin-bottom:clamp(30px,5vw,60px)}
.section-label .line{flex:1;height:1px;background:var(--border)}
.section-label .mono{flex-shrink:0}

/* ============================================================
   ABOUT - 摄影哲学
   ============================================================ */
.about-grid{
  display:grid;grid-template-columns:1fr 1fr;
  gap:var(--gap);max-width:var(--max-width);margin:0 auto;
  align-items:center;
}
.about-visual{
  position:relative;
  aspect-ratio:4/5;
  background:var(--bg-card);
  overflow:hidden;
}
.about-visual .frame{
  position:absolute;inset:12px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
}
.about-visual .frame-inner{
  width:60%;aspect-ratio:1;
  border:1px solid var(--accent-dim);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--accent);font-family:var(--font-serif);font-size:2rem;
}
.about-text h2{margin-bottom:24px;line-height:1.3}
.about-text h2 em{font-style:normal;color:var(--accent)}
.about-text p{color:var(--text-dim);margin-bottom:16px;font-size:0.95rem}
.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;padding-top:40px;border-top:1px solid var(--border)}
.stat-num{font-family:var(--font-serif);font-size:2.2rem;color:var(--accent)}
.stat-label{font-size:0.75rem;color:var(--text-muted);margin-top:4px;letter-spacing:0.04em}

/* ============================================================
   GALLERY PREVIEW - 首页作品展示
   ============================================================ */
.gallery-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  grid-template-rows:300px 300px;
  gap:4px;max-width:var(--max-width);margin:0 auto;
}
.gallery-item{
  position:relative;overflow:hidden;cursor:pointer;
  background:var(--bg-card);
}
.gallery-item:first-child{grid-row:span 2}
.gallery-item .gi-img{
  width:100%;height:100%;
  background:linear-gradient(135deg,var(--bg-card),var(--border-light));
  transition:transform 0.6s;
}
.gallery-item:hover .gi-img{transform:scale(1.05)}
.gallery-item .gi-overlay{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(0,0,0,0.7),transparent 50%);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:24px;opacity:0;transition:opacity 0.3s;
}
.gallery-item:hover .gi-overlay{opacity:1}
.gi-overlay .gi-cat{font-family:var(--font-mono);font-size:0.65rem;letter-spacing:0.1em;color:var(--accent);text-transform:uppercase}
.gi-overlay .gi-title{font-size:1.1rem;margin-top:4px}

.gallery-cta{text-align:center;margin-top:40px}

/* ============================================================
   SERVICES - 服务项目
   ============================================================ */
.services-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;max-width:var(--max-width);margin:0 auto;
  background:var(--border);
}
.service-card{
  background:var(--bg-card);padding:48px 32px;
  transition:background 0.3s;
  display:flex;flex-direction:column;
}
.service-card:hover{background:var(--bg-alt)}
.service-card .sv-num{font-family:var(--font-serif);font-size:3rem;color:var(--accent-dim);opacity:0.3;margin-bottom:16px}
.service-card h3{font-size:1.2rem;margin-bottom:12px;font-family:var(--font-serif)}
.service-card p{color:var(--text-dim);font-size:0.85rem;line-height:1.7;flex:1}
.service-card .sv-link{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:0.8rem;letter-spacing:0.06em;color:var(--accent);transition:gap 0.3s}
.service-card .sv-link:hover{gap:12px}

/* ============================================================
   QUOTE - 引用区
   ============================================================ */
.quote-section{
  text-align:center;padding:clamp(80px,12vw,160px) clamp(20px,5vw,60px);
  background:var(--bg-alt);position:relative;overflow:hidden;
}
.quote-section::before{
  content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:600px;height:600px;
  background:radial-gradient(circle,rgba(201,168,124,0.04) 0%,transparent 70%);
  pointer-events:none;
}
.quote-mark{font-family:var(--font-serif);font-size:8rem;color:var(--accent-dim);opacity:0.15;line-height:1;margin-bottom:-40px}
.quote-text{font-family:var(--font-serif);font-size:clamp(1.4rem,3vw,2rem);max-width:700px;margin:0 auto 24px;line-height:1.5;color:var(--text)}
.quote-author{color:var(--text-muted);font-size:0.85rem;letter-spacing:0.04em}

/* ============================================================
   PORTFOLIO PAGE - 作品画廊
   ============================================================ */
.portfolio-header{
  padding:140px clamp(20px,5vw,60px) 60px;
  text-align:center;max-width:var(--max-width);margin:0 auto;
}
.portfolio-header h1{margin-bottom:12px}
.portfolio-header p{color:var(--text-dim);max-width:500px;margin:0 auto}

.filter-bar{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-bottom:40px}
.filter-btn{
  padding:8px 20px;font-size:0.8rem;letter-spacing:0.06em;
  border:1px solid var(--border);transition:all 0.3s;
  text-transform:uppercase;
}
.filter-btn:hover,.filter-btn.active{background:var(--accent);color:var(--bg);border-color:var(--accent)}

.portfolio-masonry{
  columns:3;column-gap:4px;
  max-width:var(--max-width);margin:0 auto;
  padding:0 clamp(20px,5vw,60px);
}
.portfolio-masonry .pm-item{
  break-inside:avoid;margin-bottom:4px;
  position:relative;overflow:hidden;cursor:pointer;
  background:var(--bg-card);
}
.portfolio-masonry .pm-item img{width:100%;display:block;transition:transform 0.6s}
.portfolio-masonry .pm-item:hover img{transform:scale(1.04)}
.portfolio-masonry .pm-item .pm-overlay{
  position:absolute;inset:0;
  background:rgba(0,0,0,0.6);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:20px;opacity:0;transition:opacity 0.3s;
}
.portfolio-masonry .pm-item:hover .pm-overlay{opacity:1}

/* ============================================================
   NEWS - 摄影资讯
   ============================================================ */
.news-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:var(--gap);max-width:var(--max-width);margin:0 auto;
}
.news-card{position:relative;overflow:hidden}
.news-card .nc-thumb{
  aspect-ratio:16/10;background:var(--bg-card);
  margin-bottom:20px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);font-size:2rem;
  transition:transform 0.4s;
}
.news-card:hover .nc-thumb{transform:scale(1.02)}
.news-card .nc-date{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.08em;color:var(--accent);margin-bottom:8px}
.news-card h3{font-size:1.1rem;margin-bottom:8px;transition:color 0.3s;line-height:1.4}
.news-card:hover h3{color:var(--accent)}
.news-card .nc-desc{color:var(--text-dim);font-size:0.85rem;line-height:1.6}

/* ============================================================
   ARTICLE DETAIL
   ============================================================ */
.article-page{padding:140px clamp(20px,5vw,60px) 80px;max-width:780px;margin:0 auto}
.article-page .article-header{margin-bottom:40px;text-align:center}
.article-page .article-header .mono{margin-bottom:12px}
.article-page .article-header h1{font-size:clamp(1.6rem,3.5vw,2.6rem);margin-bottom:16px}
.article-page .article-body{line-height:1.9;color:var(--text-dim)}
.article-page .article-body h2{font-size:1.3rem;color:var(--text);margin:40px 0 16px;font-family:var(--font-sans)}
.article-page .article-body p{margin-bottom:16px;font-size:0.95rem}
.article-page .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:40px;padding-top:40px;border-top:1px solid var(--border)}
.article-page .article-tags .tag{padding:6px 16px;border:1px solid var(--border);font-size:0.75rem;transition:all 0.3s;letter-spacing:0.04em}
.article-page .article-tags .tag:hover{border-color:var(--accent);color:var(--accent)}

/* ============================================================
   CONTACT BAR - 底部联系栏
   ============================================================ */
.contact-bar{
  padding:clamp(60px,8vw,100px) clamp(20px,5vw,60px);
  background:var(--bg-alt);
  border-top:1px solid var(--border);
}
.contact-bar-inner{
  max-width:var(--max-width);margin:0 auto;
  display:grid;grid-template-columns:2fr 1fr 1fr;
  gap:var(--gap);
}
.contact-bar h3{font-family:var(--font-serif);font-size:1.3rem;margin-bottom:16px}
.contact-bar p,.contact-bar li{color:var(--text-dim);font-size:0.85rem;line-height:2}
.contact-bar .cb-social{display:flex;gap:16px;margin-top:16px}
.contact-bar .cb-social a{
  width:40px;height:40px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  transition:all 0.3s;font-size:0.8rem;
}
.contact-bar .cb-social a:hover{border-color:var(--accent);color:var(--accent)}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{text-align:center;padding:32px;border-top:1px solid var(--border);color:var(--text-muted);font-size:0.75rem;letter-spacing:0.04em}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:0.8rem;color:var(--text-muted);margin-bottom:40px;flex-wrap:wrap}
.breadcrumb a{transition:color 0.3s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{color:var(--text-dim)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .about-grid{grid-template-columns:1fr}
  .about-visual{aspect-ratio:3/2;max-width:400px;margin:0 auto}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{grid-template-columns:1fr 1fr;grid-template-rows:250px 250px}
  .gallery-item:first-child{grid-row:span 1;grid-column:span 2}
  .portfolio-masonry{columns:2}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .contact-bar-inner{grid-template-columns:1fr 1fr}
}

@media (max-width:768px){
  .nav{display:none}
  .menu-btn{display:flex}
  .nav.open{display:flex;flex-direction:column;position:fixed;inset:0;background:var(--bg);justify-content:center;align-items:center;gap:32px;z-index:100}
  .nav.open a{font-size:1.4rem;font-family:var(--font-serif)}
  .hero{padding-top:80px}
  .hero-content{padding:60px 20px}
  .services-grid{grid-template-columns:1fr}
  .about-stats{grid-template-columns:repeat(3,1fr);gap:16px}
  .stat-num{font-size:1.6rem}
  .gallery-grid{grid-template-columns:1fr;grid-template-rows:200px 200px 200px}
  .gallery-item:first-child{grid-column:span 1}
  .portfolio-masonry{columns:1}
  .news-grid{grid-template-columns:1fr}
  .contact-bar-inner{grid-template-columns:1fr;gap:32px}
}