/* css/style.css */
/* ========== 基础变量与重置 ========== */
:root{
  --bg: #0b1020;              /* 背景（深色） */
  --panel: #0f172a;           /* 面板底色 */
  --card: #111827;            /* 卡片底色 */
  --text: #e5e7eb;            /* 主文本 */
  --muted: #a6adbb;           /* 次级文本 */
  --brand: #60a5fa;           /* 品牌高亮 */
  --brand-2: #34d399;         /* 辅助高亮 */
  --danger: #ef4444;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --w: 1120px;
  --nav-h: 64px;
  --gap: 20px;
}
*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  margin:0;
  font: 16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,
        "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",
        "Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2240 0%, transparent 60%) ,
              radial-gradient(900px 400px at 90% -20%, #0e3448 0%, transparent 60%) ,
              var(--bg);
  background-attachment: fixed;
}
img{max-width:100%;height:auto;display:block}

/* ========== 统一圆角渲染（所有用户/项目图片） ========== */
img, .rounded { border-radius: var(--radius-sm); }

/* ========== 布局与容器 ========== */
.container{max-width:var(--w);padding:0 20px;margin:0 auto}
section{padding:72px 0; scroll-margin-top: calc(var(--nav-h) + 12px);}
.muted{color:var(--muted)}
.brand{color:var(--brand)}
.accent{color:var(--brand-2)}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  background:linear-gradient(135deg,var(--brand),#7c3aed);
  color:#fff;border:none;border-radius:12px;padding:12px 16px;
  font-weight:600;text-decoration:none;box-shadow:var(--shadow);
  transition:transform .15s ease, filter .2s ease;
}
.btn:hover{transform:translateY(-1px);filter:saturate(1.1)}
.btn.ghost{
  background:transparent;border:1px solid #32405b;color:var(--text);
  box-shadow:none;
}
.pill{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:#16233f;color:#b7c3d7;font-size:12px;border:1px solid #223359;
}

/* ========== 顶部导航 ========== */
.site-header{
  position:sticky;top:0;z-index:20;height:var(--nav-h);
  backdrop-filter:saturate(1.2) blur(10px);
  background: color-mix(in oklab, var(--panel) 90%, transparent);
  border-bottom:1px solid #1f2937;
}
.nav{
  height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;
  gap:16px;
}
.brandmark{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.brandmark .logo{
  width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:conic-gradient(from 210deg, #60a5fa, #34d399, #7c3aed, #60a5fa);
  box-shadow:0 4px 14px rgba(96,165,250,.35);
  font-weight:900;color:#0b1020;font-size:14px;
}
.brandmark .title{font-weight:800;letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-links a{
  color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:10px;
  transition:color .2s ease, background .2s ease;
}
.nav-links a.active, .nav-links a:hover{color:#fff;background:#1a243a}
.menu-btn{display:none}

/* ========== 区域（首页） ========== */
.hero{
  display:grid;gap:28px;align-items:center;
  grid-template-columns: 1.25fr 1fr;
}
.hero h1{margin:0 0 10px;font-size:40px;line-height:1.15}
.hero p{margin:0 0 18px;color:#cdd5e1}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{
  padding:16px;background:linear-gradient(180deg,#0f1b34,#0b1326);
  border:1px solid #1f2d4a;border-radius:var(--radius);box-shadow:var(--shadow);
}
.hero-visual img{width:100%;height:auto}

/* ========== 卡片与网格 ========== */
.grid{
  display:grid;gap:18px;
  grid-template-columns: repeat(12, 1fr);
}
.col-12{grid-column: span 12}
.col-6{grid-column: span 6}
.col-4{grid-column: span 4}
.card{
  background:linear-gradient(180deg,#0e162b,#0b1326);
  border:1px solid #1f2d4a;border-radius:var(--radius);padding:18px;
  box-shadow: var(--shadow);
}
.card h3{margin:0 0 6px}
.card .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}

/* ========== 团队头像卡片 ========== */
.member{
  display:flex;gap:14px;align-items:center
}
.avatar{
  width:64px;height:64px;flex:0 0 auto;border-radius:12px;overflow:hidden;
  border:1px solid #1f2d4a;background:#0d1324;
}
.avatar img{width:100%;height:100%;object-fit:cover}

/* ========== 底部与杂项 ========== */
footer{padding:28px 0;color:#9da7bb;border-top:1px solid #1f2937;margin-top:20px}

/* ========== 响应式 ========== */
@media (max-width: 960px){
  .hero{grid-template-columns: 1fr}
  .col-6{grid-column: span 12}
  .col-4{grid-column: span 12}
}
@media (max-width: 720px){
  .nav{gap:8px}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:#1a243a;border:1px solid #25324a;color:#cdd5e1}
  .nav-links{display:none;position:absolute;left:0;right:0;top:var(--nav-h);padding:10px 20px;background:#0f172a;border-bottom:1px solid #1f2937}
  .nav-links.show{display:flex}
  .hero h1{font-size:32px}
}

/* ========== 小动画 ========== */
.fade-in{opacity:0;transform:translateY(6px);animation:fade .6s ease both}
@keyframes fade{to{opacity:1;transform:none}}

/* 模态框背景 */
.modal {
display: none;
position: fixed;
z-index: 1000;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: rgb(0,0,0);
background-color: rgba(0,0,0,0.9);
}

/* 模态框内容 */
.modal-content {
margin: auto;
display: block;
width: 80%;
max-width: 700px;
}

/* 关闭按钮 */
.close {
position: absolute;
top: 15px;
right: 35px;
color: #f1f1f1;
font-size: 40px;
font-weight: bold;
transition: 0.3s;
}

.close:hover,
.close:focus {
color: #bbb;
text-decoration: none;
cursor: pointer;
}

/* 动画效果 */
.modal-content, #caption {  
animation-name: zoom;
animation-duration: 0.6s;
}

@keyframes zoom {
from {transform:scale(0)} 
to {transform:scale(1)}
}