/* main.css - ami998.com 全站公共样式（每条规则一行） */

/* ----- 重置 & 主题变量 ----- */
*{margin:0;padding:0;box-sizing:border-box;}
:root{--bg-primary:#121212;--bg-secondary:#1e1e1e;--bg-card:#252525;--bg-hover:#2d2d2d;--text-primary:#f0f0f0;--text-secondary:#b0b0b0;--text-muted:#7a7a7a;--border-light:#333333;--accent:#7c6aff;--accent-hover:#9a8aff;--radius:12px;--shadow:0 20px 40px -12px rgba(0,0,0,0.6);--transition:0.25s cubic-bezier(0.25,0.46,0.45,0.94);}
body{font-family:'Inter','Noto Sans SC',sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
a{color:var(--text-secondary);text-decoration:none;transition:color var(--transition);}
a:hover{color:var(--text-primary);}

/* ----- 导航栏 ----- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(18,18,18,0.8);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,0.04);padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between;}
.navbar .logo{font-size:1.5rem;font-weight:700;color:#fff;letter-spacing:-0.5px;display:flex;align-items:center;gap:6px;}
.navbar .logo i{color:var(--accent);}
.navbar .logo span{color:var(--accent);font-size:16px;}
.navbar .logo .sub{font-size:0.75rem;font-weight:400;color:var(--text-muted);letter-spacing:0;}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none;font-size:0.95rem;font-weight:500;}
.nav-links a{color:var(--text-secondary);transition:color var(--transition);position:relative;}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--accent);transition:width var(--transition);}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:#fff;}
.nav-links a.active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:16px;}
.btn-outline{background:transparent;border:1px solid var(--border-light);color:var(--text-secondary);padding:8px 18px;border-radius:40px;font-size:0.9rem;font-weight:500;cursor:pointer;transition:all var(--transition);}
.btn-outline:hover{border-color:var(--accent);color:#fff;background:rgba(124,106,255,0.08);}
.btn-primary{background:var(--accent);border:none;color:#fff;padding:8px 24px;border-radius:40px;font-size:0.9rem;font-weight:600;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 12px rgba(124,106,255,0.25);}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 20px rgba(124,106,255,0.35);}
.menu-toggle{display:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;}

/* 移动端菜单展开样式（由 /js/main.js 控制） */
.nav-links.open{display:flex !important;flex-direction:column;position:absolute;top:72px;left:0;right:0;background:var(--bg-primary);padding:24px;gap:16px;border-bottom:1px solid var(--border-light);}

/* ----- 子页通用页头 ----- */
.page-header{padding:140px 0 60px;background:radial-gradient(ellipse at 30% 20%,#1f1a2e,var(--bg-primary) 70%);text-align:center;}
.page-header h1{font-size:3.2rem;font-weight:700;letter-spacing:-0.02em;}
.page-header h1 .highlight{color:var(--accent);}
.page-header p{color:var(--text-secondary);font-size:1.2rem;max-width:700px;margin:12px auto 0;}

/* ----- 通用标题区 ----- */
.section-header{text-align:center;margin-bottom:56px;}
.section-header .tag{display:inline-block;font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;color:var(--accent);border:1px solid var(--accent);padding:2px 16px;border-radius:20px;margin-bottom:12px;}
.section-header h2{font-size:2.4rem;font-weight:600;letter-spacing:-0.02em;}
.section-header p{color:var(--text-secondary);font-size:1.1rem;margin-top:8px;}

/* ----- 微动画 ----- */
.fade-up{opacity:0;transform:translateY(20px);animation:fadeUp 0.7s ease forwards;}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}
.delay-1{animation-delay:0.1s;}
.delay-2{animation-delay:0.2s;}
.delay-3{animation-delay:0.3s;}

/* ----- 页脚 ----- */
.footer{padding:48px 0 32px;background:var(--bg-primary);border-top:1px solid var(--border-light);}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;}
.footer-brand .logo{font-size:1.6rem;font-weight:700;color:#fff;display:flex;align-items:center;gap:8px;}
.footer-brand .logo i{color:var(--accent);}
.footer-brand .logo span{color:var(--accent);}
.footer-brand .logo .sub{font-size:0.7rem;font-weight:400;color:var(--text-muted);}
.footer-brand p{color:var(--text-secondary);font-size:0.9rem;margin-top:8px;max-width:300px;}
.footer-brand p strong{color:var(--text-primary);}
.footer-col h5{font-weight:600;margin-bottom:12px;font-size:1rem;}
.footer-col ul{list-style:none;}
.footer-col ul li{margin-bottom:8px;}
.footer-col ul a{color:var(--text-secondary);font-size:0.9rem;transition:color var(--transition);}
.footer-col ul a:hover{color:#fff;}
.footer-col ul a i{margin-right:6px;}
.footer-bottom{border-top:1px solid var(--border-light);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;color:var(--text-muted);font-size:0.85rem;}
.footer-social a{margin-left:20px;color:var(--text-muted);font-size:1.2rem;transition:color var(--transition);}
.footer-social a:hover{color:var(--accent);}

/* ----- 公共响应式适配 ----- */
@media (max-width:992px){.page-header h1{font-size:2.6rem;}.footer-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:768px){.nav-links{display:none;}.menu-toggle{display:block;}.page-header h1{font-size:2rem;}.section-header h2{font-size:1.8rem;}.footer-grid{grid-template-columns:1fr;gap:24px;}.footer-bottom{flex-direction:column;align-items:flex-start;}.footer-social a{margin-left:0;margin-right:16px;}}