/* ── OTLESS Design System v2 ── */
/* 零依赖 · 纯手写 · 灵感来自 NexBox */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

/* ── 设计令牌 ── */
:root{
  --accent:#2563EB;--accent-2:#93C5FD;--accent-soft:rgba(37,99,235,.08);
  --text-1:#1a1c2e;--text-2:#5a5f7a;--text-3:#9498b8;
  --bg:#f5f5fb;--white:#fff;--card-bg:rgba(255,255,255,.65);
  --glass-border:rgba(255,255,255,.5);
  --shadow:0 2px 24px rgba(37,99,235,.04),0 1px 3px rgba(0,0,0,.03),0 0 0 1px rgba(255,255,255,.04);
  --shadow-hover:0 8px 32px rgba(37,99,235,.08),0 1px 4px rgba(0,0,0,.04);
  --radius:18px;--radius-sm:10px;
  --max-w:1020px;
}

html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text-1);line-height:1.65;
  overflow-x:hidden;-webkit-font-smoothing:antialiased
}

/* ── 毛玻璃背景层 ── */
body::before{
  content:'';position:fixed;inset:0;z-index:-1;
  background:url('../img/bg-main.png') center/cover no-repeat fixed;
  filter:blur(8px);transform:scale(1.1)
}
body::after{
  content:'';position:fixed;inset:0;z-index:0;
  background:rgba(255,255,255,.75);pointer-events:none
}

/* ── 全局链接 ── */
a{color:var(--accent);text-decoration:none;transition:.2s}
a:hover{opacity:.8}

/* ── 交替板块（导航蓝淡色）── */
.section-alt{background:rgba(37,99,235,.03);border-top:1px solid rgba(37,99,235,.06);border-bottom:1px solid rgba(37,99,235,.06)}

/* ── 布局容器 ── */
.wrap{position:relative;z-index:2;max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}
.section{padding:5rem 0;position:relative;z-index:1}

/* ── 导航栏 ── */
.nav{
  position:sticky;top:0;z-index:200;
  display:flex;justify-content:center;
  padding:1rem 1.5rem
}
.nav-pill{position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
  max-width:var(--max-w);width:100%;
  background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.10);
  border-radius:3rem;padding:.5rem .7rem .5rem 1.5rem;
  box-shadow:0 2px 24px rgba(37,99,235,.04),0 1px 3px rgba(0,0,0,.03)
}
.nav-brand{font-weight:800;font-size:1.1rem;color:var(--text-1);white-space:nowrap;flex-shrink:0}
.nav-brand em{font-style:normal;color:var(--accent);font-weight:600}
.nav-links{display:flex;gap:.3rem;list-style:none;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--text-2);font-size:.92rem;font-weight:500;padding:.45rem .9rem;
  border-radius:2rem;transition:.2s;white-space:nowrap}
.nav-links a:hover{color:var(--accent);background:var(--accent-soft)}
.nav-links a.active{color:var(--accent);background:var(--accent-soft);font-weight:600}
.nav-btn{position:relative;display:inline-block;background:var(--accent);color:var(--white);border:none;padding:.45rem 1.2rem;
  border-radius:2rem;font-weight:600;font-size:.85rem;cursor:pointer;transition:.2s;
  white-space:nowrap;flex-shrink:0}
.nav-btn:hover{opacity:.9;transform:translateY(-1px)}
.nav-menu-btn{display:none;background:none;border:none;cursor:pointer;color:var(--text-1);flex-shrink:0}
.nav-menu-btn svg{width:22px;height:22px}

/* 移动端抽屉 */
.nav-drawer{display:none;position:fixed;top:80px;left:1rem;right:1rem;z-index:190;
  background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.5);border-radius:var(--radius);
  box-shadow:0 12px 40px rgba(0,0,0,.1);padding:1.5rem;flex-direction:column;gap:.5rem}
.nav-drawer.show{display:flex}
.nav-drawer a{display:block;padding:.65rem 1rem;border-radius:var(--radius-sm);
  color:var(--text-1);font-weight:500;font-size:.95rem;transition:.15s}
.nav-drawer a:hover{background:var(--accent-soft);color:var(--accent)}

/* ── 硬件监控卡片 ── */
.hw-card{
  background:var(--white);border-radius:var(--radius);padding:2rem 1.5rem;
  box-shadow:var(--shadow);text-align:center;transition:.3s;border:1px solid rgba(0,0,0,.04)
}
.hw-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.hw-icon svg{width:22px;height:22px}
.hw-card .hw-icon{
  width:56px;height:56px;border-radius:16px;display:flex;align-items:center;
  justify-content:center;font-size:1.5rem;margin:0 auto 1rem
}
.hw-card .hw-name{font-size:2rem;font-weight:800;color:var(--text-1);margin-bottom:.2rem}
.hw-card .hw-desc{font-size:.85rem;color:var(--text-3)}

/* ── 数据横卡（NexBox AzureSource 风格）── */
.data-card{
  display:flex;align-items:center;gap:1.25rem;padding:1.5rem 2rem;
  background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid rgba(0,0,0,.04);transition:.3s
}
.data-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.data-card .data-icon{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;
  justify-content:center;font-size:1.4rem;flex-shrink:0
}
.data-card .data-info{flex:1}
.data-card .data-name{font-size:.85rem;color:var(--text-3);margin-bottom:2px}
.data-card .data-value{font-size:1.6rem;font-weight:800;color:var(--text-1)}
.data-card .data-arrow{color:var(--text-3);font-size:1.2rem;transition:.2s}
.data-card:hover .data-arrow{color:var(--accent);transform:translateX(3px)}

/* ── 区块标题 ── */
.sec-head{text-align:center;margin-bottom:2rem}
.sec-eyebrow{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--accent);margin-bottom:.3rem}
.sec-title{font-size:1.8rem;font-weight:800;color:var(--text-1);letter-spacing:-.5px}
.sec-desc{font-size:.95rem;color:var(--text-2);margin-top:.4rem}

/* ── NexBox 系统优化卡片 ── */
.opt-categories{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
.opt-cat{
  background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-radius:var(--radius);padding:1.5rem;transition:.3s;
  border:1px solid rgba(255,255,255,.50);box-shadow:var(--shadow)
}
.opt-cat:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.opt-cat-head{display:flex;align-items:center;gap:.9rem;margin-bottom:1.1rem}
.opt-cat-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex-shrink:0}
.opt-cat-icon svg{width:22px;height:22px}
.opt-cat-name{font-size:.95rem;font-weight:700;color:var(--text-1);margin-bottom:.15rem}
.opt-cat-count{font-size:.75rem;color:var(--text-3);font-weight:500}
.opt-cat-tags{display:flex;flex-wrap:wrap;gap:.45rem}
.opt-tag{font-size:.74rem;padding:.3rem .7rem;border-radius:1rem;font-weight:500}
.opt-tag{background:rgba(37,99,235,.08);color:#2563EB}
.opt-tag-amber{background:rgba(217,119,6,.08);color:#D97706}
.opt-tag-teal{background:rgba(13,148,136,.08);color:#0D9488}
.opt-tag-purple{background:rgba(124,58,237,.08);color:#7C3AED}
.opt-tag-rose{background:rgba(244,63,94,.08);color:#F43F5E}
@media(max-width:768px){.opt-categories{grid-template-columns:1fr}}

/* ── Hero ── */
.hero{text-align:center;padding:10rem 0 10rem;position:relative;z-index:1}
.section,.footer,.auth-wrap{position:relative;z-index:1}
.hero-chip{display:inline-flex;align-items:center;gap:.5rem;background:var(--accent-soft);
  color:var(--accent);font-size:.82rem;font-weight:600;padding:.35rem .9rem;
  border-radius:2rem;margin-bottom:1rem;border:1px solid rgba(37,99,235,.12)}
.hero-chip-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{font-size:2.8rem;font-weight:800;letter-spacing:-1px;line-height:1.2;margin-bottom:1.8rem}
.hero-title em{font-style:normal;color:var(--accent)}
.hero-desc{font-size:1.05rem;color:var(--text-2);max-width:600px;margin:0 auto 2rem;line-height:1.7}
.hero-actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:.65rem 1.8rem;border-radius:2rem;font-weight:600;font-size:.9rem;
  cursor:pointer;transition:.2s;border:none;text-align:center}
.btn-primary,.btn-outline{background:rgba(255,255,255,.20);color:var(--text-1);border:1px solid rgba(255,255,255,.30);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.btn-primary:hover,.btn-outline:hover{background:var(--accent);color:var(--white);border-color:var(--accent);opacity:1;transform:translateY(-1px)}

/* ── 毛玻璃容器 ── */
.glass-container{
  background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.10);border-radius:var(--radius);padding:1.5rem
}

/* ── 玻璃卡片 ── */
.card{
  background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--glass-border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:2rem;transition:.3s
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card h3{font-size:1.15rem;font-weight:700;color:var(--text-1);margin-bottom:.4rem}
.card p{font-size:.9rem;color:var(--text-2);line-height:1.6}

/* ── 网格 ── */
.grid{display:grid;gap:1.25rem}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}

/* ── 商品卡片 ── */
.prod-card,.card,.opt-card,.hw-card{
  background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-radius:var(--radius);box-shadow:var(--shadow);transition:.3s;
  cursor:pointer;border:1px solid rgba(255,255,255,.50)
}
.prod-card{overflow:hidden}
.card{padding:2rem}
.opt-card{padding:1.5rem}
.hw-card{padding:2rem 1.5rem;text-align:center}
.prod-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.prod-card .img-wrap{height:200px;overflow:hidden;background:#f0f0f8;display:flex;align-items:center;justify-content:center}
.prod-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.prod-card:hover .img-wrap img{transform:scale(1.03)}
.prod-card .info{padding:1rem}
.prod-card .info .name{font-weight:700;font-size:.92rem;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:.25rem}
.prod-card .info .cat{font-size:.75rem;color:var(--accent);background:var(--accent-soft);
  display:inline-block;padding:.15rem .5rem;border-radius:1rem;margin-bottom:.4rem}
.prod-card .info .price{font-weight:800;font-size:1.05rem;color:#e0566b}
.prod-card .info .orig{font-size:.8rem;color:var(--text-3);text-decoration:line-through;margin-left:.4rem}

/* ── 筛选侧栏 ── */
.filter-bar{display:flex;gap:1rem;flex-wrap:wrap;align-items:center;margin-bottom:1.5rem}
.filter-bar select,.filter-bar input{
  padding:.5rem 1rem;border-radius:var(--radius-sm);border:1px solid rgba(0,0,0,.08);
  background:var(--white);color:var(--text-1);font-size:.88rem;outline:none
}
.filter-bar select:focus,.filter-bar input:focus{border-color:var(--accent)}
.search-wrap{display:flex;gap:.5rem;align-items:center}
.search-wrap input{width:240px;padding:.55rem 1rem;border-radius:2rem;border:1px solid rgba(0,0,0,.08);
  background:var(--white);font-size:.88rem;outline:none;color:var(--text-1)}
.search-wrap input:focus{border-color:var(--accent)}
.search-wrap button{background:var(--accent);color:#fff;border:none;padding:.55rem 1.2rem;
  border-radius:2rem;font-weight:600;font-size:.85rem;cursor:pointer}

/* ── 分页 ── */
.pagination{display:flex;justify-content:center;gap:.4rem;margin-top:2rem}
.pagination button{width:36px;height:36px;border-radius:var(--radius-sm);border:1px solid rgba(0,0,0,.08);
  background:var(--white);color:var(--text-2);font-weight:600;cursor:pointer;transition:.15s}
.pagination button:hover{background:var(--accent-soft);color:var(--accent)}
.pagination button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.pagination button:disabled{opacity:.3;cursor:default}

/* ── 弹窗 ── */
.modal-overlay{display:none;position:fixed;inset:0;z-index:9999;
  background:rgba(0,0,0,.3);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  align-items:center;justify-content:center;padding:1.5rem}
.modal-overlay.show{display:flex}
.modal-box{background:var(--white);border-radius:var(--radius);max-width:480px;width:100%;
  max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.15);position:relative}
.modal-close{position:absolute;top:12px;right:12px;z-index:2;width:32px;height:32px;
  border-radius:50%;border:none;background:rgba(0,0,0,.3);color:#fff;font-size:1rem;cursor:pointer}
.modal-img{height:280px;background:#f0f0f8;display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius) var(--radius) 0 0;overflow:hidden}
.modal-img img{width:100%;height:100%;object-fit:cover}
.modal-info{padding:1.5rem}
.modal-info h3{font-size:1.2rem;font-weight:700;margin-bottom:.5rem}
.modal-info .desc{color:var(--text-2);font-size:.88rem;line-height:1.6;margin-bottom:1rem}
.modal-info .price{font-size:1.4rem;font-weight:800;color:#e0566b}

/* ── 登录页 ── */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem
}
.auth-card{
  background:var(--card-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);border-radius:var(--radius);box-shadow:var(--shadow);
  width:100%;max-width:400px;padding:2.5rem 2rem;text-align:center
}
.auth-card h3{font-size:1.3rem;font-weight:700;margin-bottom:.3rem}
.auth-card .sub{color:var(--text-3);font-size:.88rem;margin-bottom:1.5rem}
.auth-card .field{margin-bottom:1rem;text-align:left}
.auth-card .field input{width:100%;padding:.65rem .9rem;border-radius:var(--radius-sm);
  border:1px solid rgba(0,0,0,.1);font-size:.9rem;color:var(--text-1);outline:none}
.auth-card .field input:focus{border-color:var(--accent)}
.auth-card button{width:100%;padding:.65rem;border-radius:2rem;background:var(--accent);
  color:#fff;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:.2s}
.auth-card button:hover{opacity:.9}
.auth-card .link{margin-top:1rem;font-size:.85rem;color:var(--text-3)}
.auth-card .link a{font-weight:600}

/* ── 错误提示 ── */
.error-msg{display:none;color:#e74c3c;font-size:.85rem;text-align:center;
  margin-bottom:1rem;padding:.5rem;background:#fde8e8;border-radius:var(--radius-sm)}

/* ── 页脚 ── */
.footer{text-align:center;padding:3rem 0;border-top:1px solid rgba(0,0,0,.04)}
.footer .brand{font-weight:700;font-size:1.1rem;margin-bottom:.4rem}
.footer .brand em{font-style:normal;color:var(--accent)}
.footer .note{color:var(--text-3);font-size:.82rem}

/* ── 滚动渐显动画 ── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ── 响应式 ── */
@media(max-width:768px){
  .grid-3,.grid-4,.grid-5{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .hero h1{font-size:2rem}
  .nav-links,.nav-btn{display:none}
  .nav-menu-btn{display:block}
  .nav-pill{position:relative;padding:.5rem 1.2rem}
  .wrap{padding:0 1.5rem}
  .section{padding:3rem 0}
}
@media(max-width:480px){
  .grid-3,.grid-4,.grid-5{grid-template-columns:1fr}
  .hero h1{font-size:1.6rem}
  .hero p{font-size:.95rem}
  .search-wrap input{width:150px}
}

.hw-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.hw-item{background:rgba(255,255,255,.20);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius);padding:2rem 1.5rem;text-align:center;transition:.3s;border:1px solid rgba(255,255,255,.50);box-shadow:var(--shadow)}
.hw-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.hw-icon{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;margin:0 auto .75rem;font-size:1.5rem}
.hw-name{font-size:1.05rem;font-weight:700;color:var(--text-1);margin-bottom:.2rem}
.hw-desc{font-size:.85rem;color:var(--text-3)}
.hw-icon-blue{background:rgba(37,99,235,.08);color:#2563EB}
.hw-icon-amber{background:rgba(217,119,6,.08);color:#D97706}
.hw-icon-teal{background:rgba(13,148,136,.08);color:#0D9488}
.hw-icon-purple{background:rgba(124,58,237,.08);color:#7C3AED}
.hw-icon-red{background:rgba(220,38,38,.08);color:#DC2626}
.hw-icon-slate{background:rgba(71,85,105,.08);color:#475569}
@media(max-width:768px){.hw-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.hw-grid{grid-template-columns:1fr}}
.pw-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);cursor:pointer;font-size:1.1rem;opacity:.5;user-select:none;transition:.15s}
.pw-toggle:hover{opacity:1}
.pw-toggle svg{width:20px;height:20px;color:#5a5f7a}
.nav-avatar{width:22px;height:22px;display:inline-block;border-radius:50%;cursor:pointer;transition:.2s;vertical-align:middle}.nav-avatar:hover{opacity:.8;transform:scale(1.05)}
.nav-user-btn{display:inline-flex;align-items:center;gap:8px;padding:4px 12px 4px 4px;border-radius:2rem;cursor:pointer;transition:.2s;text-decoration:none;position:relative;white-space:nowrap;flex-shrink:0;border:none;background:none}
.nav-user-btn:hover{background:var(--accent-soft)}
.nav-user-avatar{width:26px;min-width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.75rem;flex-shrink:0}
.nav-user-name{font-size:.92rem;font-weight:500;color:var(--text-2)}
.user-card{display:none;position:absolute;top:calc(100% + 8px);right:0;background:rgba(255,255,255,.95);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid rgba(0,0,0,.06);border-radius:16px;box-shadow:0 16px 48px rgba(0,0,0,.12);padding:1.25rem;min-width:220px;z-index:300}
.user-card.show{display:block}
.uc-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem}
.uc-avatar{width:44px;height:44px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;flex-shrink:0}
.uc-name{font-weight:700;font-size:.95rem;color:var(--text-1)}
.uc-email{font-size:.78rem;color:var(--text-3);margin-top:2px}
.uc-divider{height:1px;background:rgba(0,0,0,.06);margin:.75rem 0}
.uc-info{display:flex;flex-direction:column;gap:.4rem;font-size:.8rem;color:var(--text-2)}
.uc-link{display:block;text-align:center;padding:.4rem;border-radius:8px;font-size:.82rem;font-weight:600;color:var(--accent);text-decoration:none;transition:.15s}
.uc-link:hover{background:rgba(37,99,235,.06)}
@media(max-width:768px){.nav-user-name{display:none}}
.uc-link-logout{color:#e74c3c!important}.uc-link-logout:hover{background:rgba(231,76,60,.06)!important}
.uc-input{width:100%;padding:.4rem .6rem;border:1px solid rgba(0,0,0,.1);border-radius:8px;font-size:.82rem;color:var(--text-1);margin-bottom:.4rem;outline:none;box-sizing:border-box}
.uc-input:focus{border-color:var(--accent)}
.uc-btn-save{padding:.35rem 1rem;border-radius:6px;border:none;background:var(--accent);color:#fff;font-size:.8rem;font-weight:600;cursor:pointer;flex:1}
.uc-btn-cancel{padding:.35rem 1rem;border-radius:6px;border:1px solid rgba(0,0,0,.1);background:#fff;color:var(--text-2);font-size:.8rem;font-weight:600;cursor:pointer;flex:1}
.uc-link{display:block;text-align:center;padding:.4rem;border-radius:8px;font-size:.82rem;font-weight:600;color:var(--accent);text-decoration:none;transition:.15s}
.uc-link:hover{background:rgba(37,99,235,.06)}
.uc-link-logout{display:block;text-align:center;padding:.4rem;border-radius:8px;font-size:.82rem;font-weight:600;color:#e74c3c!important;text-decoration:none;transition:.15s}
.uc-link-logout:hover{background:rgba(231,76,60,.06)}