/* cgos.cc 项目展示首页样式 */
:root{
  --ink:#0a1028;
  --paper:#f0e6d2;
  --accent:#e2603f;
  --accent-dim:#b34a30;
  --bamboo:#a8b06a;
  --serif:"Songti SC","Noto Serif SC","Noto Serif CJK SC","STSong","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--sans);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{ color:var(--accent); text-decoration:none; }
a:hover{ text-decoration:underline; }
.container{ width:min(1100px, 92vw); margin:0 auto; }

/* 顶部导航 */
header{
  position:fixed; top:0; left:0; right:0; z-index:50;
  background:rgba(10,16,40,.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(240,230,210,.08);
}
nav{ display:flex; align-items:center; justify-content:space-between; height:64px; }
.logo{ font-family:var(--serif); font-size:20px; letter-spacing:.18em; color:var(--paper); }
.logo a{ color:var(--paper); }
.nav-links{ display:flex; gap:28px; font-size:14px; }
.nav-links a{ color:rgba(240,230,210,.75); transition:color .2s; padding:4px 0; }
.nav-links a:hover, .nav-links a.active{ color:var(--accent); text-decoration:none; }
.menu-btn{ display:none; background:none; border:none; color:var(--paper); font-size:24px; cursor:pointer; padding:8px; }

/* Hero */
.hero{
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  padding:120px 0 80px; text-align:center; position:relative; overflow:hidden;
}
.hero::before{
  content:""; position:absolute; inset:0;
  background:radial-gradient(circle at 50% 30%, rgba(226,96,63,.12), transparent 55%),
             radial-gradient(circle at 80% 80%, rgba(168,176,106,.06), transparent 40%);
  pointer-events:none;
}
.hero h1{
  font-family:var(--serif); font-size:clamp(42px,8vw,88px);
  letter-spacing:.22em; color:var(--paper); margin-bottom:18px;
}
.hero h1 span{ color:var(--accent); }
.hero p{ font-size:clamp(15px,2.2vw,20px); color:rgba(240,230,210,.75); max-width:620px; margin:0 auto 36px; }
.cta{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 34px; border-radius:999px; border:1px solid var(--accent);
  color:var(--paper); font-size:15px; letter-spacing:.12em;
  transition:all .25s; background:transparent; cursor:pointer;
}
.cta:hover{ background:var(--accent); color:#fff; text-decoration:none; }
.cta svg{ width:18px; height:18px; }

/* 卡片通用 */
section{ padding:80px 0; }
section.alt{ background:rgba(240,230,210,.03); }
.section-title{
  font-family:var(--serif); font-size:28px; letter-spacing:.16em; margin-bottom:14px;
}
.section-sub{ color:rgba(240,230,210,.6); margin-bottom:42px; font-size:15px; }
.card-grid{ display:grid; gap:24px; grid-template-columns:repeat(auto-fit, minmax(260px,1fr)); }
.card{
  background:rgba(240,230,210,.05); border:1px solid rgba(240,230,210,.1);
  border-radius:16px; padding:26px; transition:transform .2s, border-color .2s;
}
.card:hover{ border-color:rgba(226,96,63,.35); transform:translateY(-4px); }
.card h3{ font-family:var(--serif); font-size:18px; margin-bottom:10px; color:var(--accent); }
.card p{ font-size:14px; color:rgba(240,230,210,.7); }

/* 项目展示 */
.project{ display:grid; grid-template-columns:1.2fr 1fr; gap:48px; align-items:center; }
.project-visual{
  aspect-ratio:16/10; border-radius:18px; overflow:hidden;
  border:1px solid rgba(240,230,210,.12); background:rgba(0,0,0,.2);
  position:relative; display:block;
}
.project-visual img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .6s; }
.project-visual:hover img{ transform:scale(1.04); }
.project-visual .play{
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  background:rgba(10,16,40,.35); opacity:0; transition:opacity .3s; pointer-events:none;
}
.project-visual:hover .play{ opacity:1; }
.play span{
  padding:10px 24px; border-radius:999px; border:1px solid var(--paper);
  color:var(--paper); font-size:14px; letter-spacing:.12em; backdrop-filter:blur(4px);
}
.project-info h2{ font-family:var(--serif); font-size:32px; margin-bottom:18px; }
.project-info p{ color:rgba(240,230,210,.75); margin-bottom:18px; }
.tag-list{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.tag{ font-size:12px; padding:4px 12px; border-radius:999px; border:1px solid rgba(240,230,210,.2); color:rgba(240,230,210,.7); }

/* 统计 */
.stats-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.stat-card{ text-align:center; padding:24px; border-radius:14px; background:rgba(240,230,210,.05); border:1px solid rgba(240,230,210,.1); }
.stat-card .num{ font-family:var(--serif); font-size:36px; color:var(--accent); min-height:44px; }
.stat-card .num.loading{ animation:pulse 1.4s ease-in-out infinite; opacity:.5; }
.stat-card .label{ font-size:13px; color:rgba(240,230,210,.6); margin-top:6px; }
@keyframes pulse{ 0%,100%{ opacity:.5; } 50%{ opacity:1; } }

/* 表单与列表 */
.form-group{ margin-bottom:16px; }
.form-group label{ display:block; font-size:13px; color:rgba(240,230,210,.7); margin-bottom:6px; }
.form-group input, .form-group textarea{
  width:100%; padding:12px 14px; border-radius:10px;
  background:rgba(240,230,210,.08); border:1px solid rgba(240,230,210,.15);
  color:var(--paper); font-size:14px; outline:none; transition:border-color .2s, background .2s;
}
.form-group input:focus, .form-group textarea:focus{ border-color:var(--accent); background:rgba(240,230,210,.1); }
.form-group textarea{ min-height:90px; resize:vertical; }
.btn{
  padding:11px 26px; border-radius:999px; border:1px solid var(--accent);
  background:transparent; color:var(--paper); font-size:14px; cursor:pointer; transition:all .2s;
}
.btn:hover{ background:var(--accent); color:#fff; }
.btn:disabled{ opacity:.5; cursor:not-allowed; }
.msg{ margin-top:12px; font-size:13px; color:var(--bamboo); min-height:20px; }
.msg.error{ color:var(--accent); }

.list{ margin-top:24px; display:flex; flex-direction:column; gap:14px; }
.list-item{
  padding:14px 16px; border-radius:12px; background:rgba(240,230,210,.05);
  border:1px solid rgba(240,230,210,.08); animation:fadeIn .35s ease;
}
.list-item .meta{ display:flex; justify-content:space-between; font-size:12px; color:rgba(240,230,210,.5); margin-bottom:6px; }
.list-item .body{ font-size:14px; color:rgba(240,230,210,.85); word-break:break-word; }
.list-empty{ padding:20px; text-align:center; color:rgba(240,230,210,.45); font-size:14px; border:1px dashed rgba(240,230,210,.15); border-radius:12px; }
.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:36px; }
@keyframes fadeIn{ from{ opacity:0; transform:translateY(6px); } to{ opacity:1; transform:translateY(0); } }

/* 页脚 */
footer{
  padding:60px 0 30px;
  border-top:1px solid rgba(240,230,210,.08);
  background:rgba(10,16,40,.5);
}
.footer-content{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:40px;
  margin-bottom:40px;
}
.footer-section h3{
  font-family:var(--serif);
  font-size:16px;
  color:var(--paper);
  margin-bottom:16px;
  letter-spacing:.05em;
}
.footer-section p{
  font-size:13px;
  color:rgba(240,230,210,.6);
  line-height:1.8;
  margin-bottom:8px;
}
.footer-section ul{
  list-style:none;
}
.footer-section ul li{
  margin-bottom:10px;
}
.footer-section ul li a{
  font-size:13px;
  color:rgba(240,230,210,.6);
  transition:color .2s;
}
.footer-section ul li a:hover{
  color:var(--accent);
  text-decoration:none;
}
.footer-bottom{
  padding-top:30px;
  border-top:1px solid rgba(240,230,210,.08);
  text-align:center;
}
.footer-bottom p{
  font-size:12px;
  color:rgba(240,230,210,.4);
  margin-bottom:8px;
}
.footer-bottom a{
  color:rgba(240,230,210,.5);
}
.footer-bottom a:hover{
  color:var(--accent);
}

@media (max-width:800px){
  .nav-links{
    display:none; position:fixed; top:64px; left:0; right:0;
    flex-direction:column; gap:0; padding:12px 0;
    background:rgba(10,16,40,.95); border-bottom:1px solid rgba(240,230,210,.1);
  }
  .nav-links.open{ display:flex; }
  .nav-links a{ padding:14px 24px; }
  .menu-btn{ display:block; }
  .project, .two-col{ grid-template-columns:1fr; }
  .stats-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-content{ grid-template-columns:repeat(2,1fr); gap:30px; }
}
@media (max-width:500px){
  .footer-content{ grid-template-columns:1fr; gap:24px; }
}